CA1175296A - Thin-wall spline forming machine - Google Patents
Thin-wall spline forming machineInfo
- Publication number
- CA1175296A CA1175296A CA000391463A CA391463A CA1175296A CA 1175296 A CA1175296 A CA 1175296A CA 000391463 A CA000391463 A CA 000391463A CA 391463 A CA391463 A CA 391463A CA 1175296 A CA1175296 A CA 1175296A
- Authority
- CA
- Canada
- Prior art keywords
- mandrel
- teeth
- forming
- racks
- drive gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000006872 improvement Effects 0.000 claims 2
- 230000033001 locomotion Effects 0.000 abstract description 9
- 238000009740 moulding (composite fabrication) Methods 0.000 description 33
- 238000005096 rolling process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H5/00—Making gear wheels, racks, spline shafts or worms
- B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
- B21H5/027—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls by rolling using reciprocating flat dies, e.g. racks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
- B21D53/28—Making other particular articles wheels or the like gear wheels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19642—Directly cooperating gears
- Y10T74/1967—Rack and pinion
Abstract
.
ABSTRACT OF THE DISCLOSURE
Thin-wall spline forming apparatus (20) disclosed includes toothed forming racks (24) having associated tooth pitch lines (48) and a toothed mandrel (22) hav-ing a tooth pitch circle (50) that is tangent to the forming rack pitch lines and of a diameter equal to the mean diameter of thin-wall splines (44) formed by meshing the rack and mandrel teeth with a thin-wall sleeve (38) of a power transmission member mounted on the mandrel between the meshing teeth. A mandrel drive gear (60) drives the mandrel in coordination with the forming racks (24) and is driven by a pair of drive racks (62) mounted for movement with the forming racks.
Best results are achieved when the mandrel (22) has the same number of teeth (40) as the number of teeth (64) of the drive gear (60) and with the mandrel and drive gear teeth aligned with each other.
ABSTRACT OF THE DISCLOSURE
Thin-wall spline forming apparatus (20) disclosed includes toothed forming racks (24) having associated tooth pitch lines (48) and a toothed mandrel (22) hav-ing a tooth pitch circle (50) that is tangent to the forming rack pitch lines and of a diameter equal to the mean diameter of thin-wall splines (44) formed by meshing the rack and mandrel teeth with a thin-wall sleeve (38) of a power transmission member mounted on the mandrel between the meshing teeth. A mandrel drive gear (60) drives the mandrel in coordination with the forming racks (24) and is driven by a pair of drive racks (62) mounted for movement with the forming racks.
Best results are achieved when the mandrel (22) has the same number of teeth (40) as the number of teeth (64) of the drive gear (60) and with the mandrel and drive gear teeth aligned with each other.
Description
~. ~75296 THIN-WALL SPLINE FORMING MACHI~E
TECHNICAL FIELD
This invention relates to apparatus for splining thin-wall sleeves of power transmission members by a pair of toothed forming racks and an associated toothed mandrel.
BACKGROUND ART
United States Patent 3,982,415, which is assi.gned to the assignee of the present invention, discloses a machine having apparatus for splining an annular thin-wall sleeve of a power transmission member by meshing die and mandrel teeth with the sleeve located therebe-tween so as to form splines in the sleeve. This spline forming process takes place in a rolling manner as the mandrel on which the power transmission member is mounted rotates upon movement of a pair of toothed dies in opposite directions on opposite sides of the mandrel.
An end wall of the pow,er transmission member is clamped against an end of the mandrel during the spline rolling process so as to insure precise forming of the splines.
Clutch hubs for automatic transmissions of road vehicles is one usage for which this spline forming process has particular utility in replacing prior impacting opera-tions used to form clutch hub splines.
United States Patent 4, 028,9~2, which is also as-signed to the assignee of the present invention, dis-closes apparatus having toothed dies with different groups of teeth that cooperate with a toothed mandrel ~;
~ 1 7~
to form splines in a thin-wall sleeve of a power trans-mission member by the rolling process discussed above.
Each toothed die includes a first tooth group of farther spaced teeth that form a first set of splines in the thin-wall sleeve in cooperation with the mandrel, and a second group of closer spaced teeth of each die there-after cooperates with the mandrel to form a second set of splines between the first set of splines while mesh-ing with the first set. Finally, the splined sleeve is again meshed with farther spaced teeth to provide cor-rection of any out-of roundness.
United States Patent 4,155,237, which is likewise assigned to the assignee of the present invention, dis-closes an automatic loader for a machine that splines thin-wall sleeves of power transmission members by the rolling process discussed above.
DISCLOSURE OF INVENTION
An object of the present invention is to provide improve~ apparatus for forming splines in a thin-wall sleeve of a power transmission member, the apparatus being of the type including a toothed mandrel on which the sleeve is mounted in preparation for splining and also including a pair of toothed forming racks that are driven in opposite directions on opposite sides of the mandrel such that meshing of the forming racks and the mandrel with the sleeve therebetween forms splines in the sleeve.
In carrying out the above object,,the forming racks have associated tooth pitch lines and the mandrel has a ~. 17529~
tooth pitch circle that is tangent to the forming rack pitch lines and of a diameter equal to the mean diame-ter of the formed splines. One half of the formedsplines are located radially inward of the mandrel pitch circle and the other one half of the formed splines are located radially outward of the mandrel pitch circle.
Good results are achieved in rolling thin~wall splines with a toothed mandrel and toothed forming racks having this construction.
A mandrel drive gear is preferably mounted for ro-tation with the mandrel and has teeth with a tooth pitch circie of the same diameter as and in a concentric re-lationship with the tooth pitch circle of the mandrel.
A pair of mandrel drive racks are respectively driven with the pair of forming racks and include teeth that mesh with the mandrel drive gear and have tooth pitch lines tangent with the pitch circle of the mandrel drive gear and parallel with the pitch lines of the forming racks. Best results are achieved with the mandrel and the mandrel drive gear having the same number of teeth as each other and with the mandrel and drive gear teeth aligned with each other.
The preferred type of machine in which the spline forming apparatus is incorporated includes lower and upper bas~s and a rear connecting portion extending therebetween and cooperating therewith to define a forwardly opening workspace within which the toothed mandrel and the pair of toothed forming racks are located. The mandrel drive gear is also located within the workspace mounted for rotation with the mandrel and located to the rear of the mandrel. Slides respec-
TECHNICAL FIELD
This invention relates to apparatus for splining thin-wall sleeves of power transmission members by a pair of toothed forming racks and an associated toothed mandrel.
BACKGROUND ART
United States Patent 3,982,415, which is assi.gned to the assignee of the present invention, discloses a machine having apparatus for splining an annular thin-wall sleeve of a power transmission member by meshing die and mandrel teeth with the sleeve located therebe-tween so as to form splines in the sleeve. This spline forming process takes place in a rolling manner as the mandrel on which the power transmission member is mounted rotates upon movement of a pair of toothed dies in opposite directions on opposite sides of the mandrel.
An end wall of the pow,er transmission member is clamped against an end of the mandrel during the spline rolling process so as to insure precise forming of the splines.
Clutch hubs for automatic transmissions of road vehicles is one usage for which this spline forming process has particular utility in replacing prior impacting opera-tions used to form clutch hub splines.
United States Patent 4, 028,9~2, which is also as-signed to the assignee of the present invention, dis-closes apparatus having toothed dies with different groups of teeth that cooperate with a toothed mandrel ~;
~ 1 7~
to form splines in a thin-wall sleeve of a power trans-mission member by the rolling process discussed above.
Each toothed die includes a first tooth group of farther spaced teeth that form a first set of splines in the thin-wall sleeve in cooperation with the mandrel, and a second group of closer spaced teeth of each die there-after cooperates with the mandrel to form a second set of splines between the first set of splines while mesh-ing with the first set. Finally, the splined sleeve is again meshed with farther spaced teeth to provide cor-rection of any out-of roundness.
United States Patent 4,155,237, which is likewise assigned to the assignee of the present invention, dis-closes an automatic loader for a machine that splines thin-wall sleeves of power transmission members by the rolling process discussed above.
DISCLOSURE OF INVENTION
An object of the present invention is to provide improve~ apparatus for forming splines in a thin-wall sleeve of a power transmission member, the apparatus being of the type including a toothed mandrel on which the sleeve is mounted in preparation for splining and also including a pair of toothed forming racks that are driven in opposite directions on opposite sides of the mandrel such that meshing of the forming racks and the mandrel with the sleeve therebetween forms splines in the sleeve.
In carrying out the above object,,the forming racks have associated tooth pitch lines and the mandrel has a ~. 17529~
tooth pitch circle that is tangent to the forming rack pitch lines and of a diameter equal to the mean diame-ter of the formed splines. One half of the formedsplines are located radially inward of the mandrel pitch circle and the other one half of the formed splines are located radially outward of the mandrel pitch circle.
Good results are achieved in rolling thin~wall splines with a toothed mandrel and toothed forming racks having this construction.
A mandrel drive gear is preferably mounted for ro-tation with the mandrel and has teeth with a tooth pitch circie of the same diameter as and in a concentric re-lationship with the tooth pitch circle of the mandrel.
A pair of mandrel drive racks are respectively driven with the pair of forming racks and include teeth that mesh with the mandrel drive gear and have tooth pitch lines tangent with the pitch circle of the mandrel drive gear and parallel with the pitch lines of the forming racks. Best results are achieved with the mandrel and the mandrel drive gear having the same number of teeth as each other and with the mandrel and drive gear teeth aligned with each other.
The preferred type of machine in which the spline forming apparatus is incorporated includes lower and upper bas~s and a rear connecting portion extending therebetween and cooperating therewith to define a forwardly opening workspace within which the toothed mandrel and the pair of toothed forming racks are located. The mandrel drive gear is also located within the workspace mounted for rotation with the mandrel and located to the rear of the mandrel. Slides respec-
2 9 ~
tively movable along slideways on the lower and upper bases of the machine each mount one of the forming racks and one of the mandrel drive racks such that the drive racks are driven with the forming racks so as to insure mandrel rotation in coordination with the forming racks.
The objects, features, and advantages of the pre-sent invention are readily apparent from the following detailed description of the best mode for carrying out the invention when taken in connection with the accom-panying drawings.
BRIEF DESCRIPTION OF DRAWINGS
.
FIGURE 1 is a front elevation view of a machine including a toothed mandrel and toothed forming racks for cooperatively forming splines in a thin-wall sleeve of a power transmission member in accordance with the invention;
FIGURF 2 is a partially sectioned view illustrating the power transmission member to be splined and the toothed mandrel on which the power transmission member is mounted during the splining;
FIGURE 3 is a sectional view through one of- the toothed racks and the toothed mandrel as well as through the thin-wall sleeve and illustrates the manner in which the splines are formed in the sleeve by meshing of the rack and mandrel teeth with the sleeve between the meshing teeth;
FIGURE 4 is an enlarged view illustrating one of the formed splines in relationship .to a tooth pitch circle of the mandrel and a tooth pitch line of one of the racks;
FIGURE 5 is a perspective view of the spline form-ing machine and illustrates a mandrel drive gear and associated drive racks that mesh with the drive gear and are driven with the toothed forming racks to coor-dinate the mandrel rotation with the forming racks move-ment; and FIGURE 6 is a schematic view illustrating the man-drel drive gear and the associated drive racks.
BEST MODE FOR CARRYING OUT THE INVENTION
Referring to FIGURE 1 of the drawings, a spline forming machine indicated generally by 10 includes lower and upper bases 12 and 14 that are interconnected by a vertically extending rear connecting portion 16 and which project forwardly therefrom so as to define a workspace 18 thàt opens to the front side of the ma-chine. Within the workspace 18, thin-wall splining ap-paratus constructed in accordance with the present in vention is indicated collectively by reference numeral 20 and includes a schematically indicated toothed man-drel 22 rotatable about an axis A as well as-a pair of lower and upper toothed forming racks 24 respectively associated with the lower and upper bases 12 and 14.
Upwardly and downwardly facing slideways 26 on the lower and upper bases 12 and 14, respectively, support asso-ciated slides 28 on which the racks 24 are secured by ~ ~7529~
bolted clamps 30 that engage end flanges 32 of the racks. A schematically indicated drive mechanism 34, such as of the type disclosed by the United States Pat-ent of Anderson 3,793,866, moves the slides 28 and the racks 24 mounted thereon rectilinearly in the direction of arrows 36 from the end-to-end relationship shown into an overlapping relationship and then reciprocally drives the racks back to the end-to-end position. During such driving, a thin-wall sleeve 38 of a power transmission member is splined by meshing of rack and mandrel teeth with the sleeve between the meshing teeth.
As seen by additional reference to FIGURES 2 and
tively movable along slideways on the lower and upper bases of the machine each mount one of the forming racks and one of the mandrel drive racks such that the drive racks are driven with the forming racks so as to insure mandrel rotation in coordination with the forming racks.
The objects, features, and advantages of the pre-sent invention are readily apparent from the following detailed description of the best mode for carrying out the invention when taken in connection with the accom-panying drawings.
BRIEF DESCRIPTION OF DRAWINGS
.
FIGURE 1 is a front elevation view of a machine including a toothed mandrel and toothed forming racks for cooperatively forming splines in a thin-wall sleeve of a power transmission member in accordance with the invention;
FIGURF 2 is a partially sectioned view illustrating the power transmission member to be splined and the toothed mandrel on which the power transmission member is mounted during the splining;
FIGURE 3 is a sectional view through one of- the toothed racks and the toothed mandrel as well as through the thin-wall sleeve and illustrates the manner in which the splines are formed in the sleeve by meshing of the rack and mandrel teeth with the sleeve between the meshing teeth;
FIGURE 4 is an enlarged view illustrating one of the formed splines in relationship .to a tooth pitch circle of the mandrel and a tooth pitch line of one of the racks;
FIGURE 5 is a perspective view of the spline form-ing machine and illustrates a mandrel drive gear and associated drive racks that mesh with the drive gear and are driven with the toothed forming racks to coor-dinate the mandrel rotation with the forming racks move-ment; and FIGURE 6 is a schematic view illustrating the man-drel drive gear and the associated drive racks.
BEST MODE FOR CARRYING OUT THE INVENTION
Referring to FIGURE 1 of the drawings, a spline forming machine indicated generally by 10 includes lower and upper bases 12 and 14 that are interconnected by a vertically extending rear connecting portion 16 and which project forwardly therefrom so as to define a workspace 18 thàt opens to the front side of the ma-chine. Within the workspace 18, thin-wall splining ap-paratus constructed in accordance with the present in vention is indicated collectively by reference numeral 20 and includes a schematically indicated toothed man-drel 22 rotatable about an axis A as well as-a pair of lower and upper toothed forming racks 24 respectively associated with the lower and upper bases 12 and 14.
Upwardly and downwardly facing slideways 26 on the lower and upper bases 12 and 14, respectively, support asso-ciated slides 28 on which the racks 24 are secured by ~ ~7529~
bolted clamps 30 that engage end flanges 32 of the racks. A schematically indicated drive mechanism 34, such as of the type disclosed by the United States Pat-ent of Anderson 3,793,866, moves the slides 28 and the racks 24 mounted thereon rectilinearly in the direction of arrows 36 from the end-to-end relationship shown into an overlapping relationship and then reciprocally drives the racks back to the end-to-end position. During such driving, a thin-wall sleeve 38 of a power transmission member is splined by meshing of rack and mandrel teeth with the sleeve between the meshing teeth.
As seen by additional reference to FIGURES 2 and
3, the mandrel 22 includes teeth 40 whose tips support the inner surface of the thin-wall sleeve 38 mounted thereon in preparation for the spline rolling process.
Each forming rack 24 includes teeth 42 positioned along its length in an oppositely facing direction from the associated slide 28 for meshing with the mandrel teeth 40 with the thin-wall sleeve 38 located between the meshing teeth. Such meshing of the mandrel teeth 40 and the rack teeth 42 deforms the sleeve 38 at diame-trically opposite upper and lower positions to formsplines or teeth 44 in a rolling manner as the mandrel 22 rotates as shown by arrow 45 in FIGURE 3 in coordi-nation with the movement of each rack 24 in the direc-tion of arrow 36. An end wall 46 of the power trans-mission member 47 is shown in FIGURE 2 and is locatedat one axial end of the sleeve 38. Clamping of end wall 46 against an end of the mandrel 22 securely locates the sleeve 38 on the mandrel as the splines 44 are formed by the meshing rack and mandrel teeth.
~ ~7529~
As illustrated in FIGUR~ 3, each forming rack 24 has an associated tooth pitch line 48 and the mandrel 22 has a tooth pitch circle 50 that is tangent to the rack pitch lines at a radial position where the mandrel teeth 40 have the same circumferential rate of movement as the linear rate of movement of the rack teeth 42.
Pitch circle 50 has a diameter D (FIGURE 4) equal to the mean diameter of the formed splines 44 such that one half of each formed spline is radially inward of the mandrel pitch circle and one half of each formed spline is radially outward of the mandrel pitch circle.
Splines 44 include inner lands 52 located within the mandrel pitch circle 50, side walls 54 extending from the inner lands across the mandrel pitch circle, and outer lands 56 located outwardly of the pitch circle.
Circumferential midpoints of the outer lands 56 are identified in FIGURE 4 by radial lines 58. The total cross-sectional area of the two halves of the outer lands 56 illustrated in FIGURE 4 and the outer por-tions of the two side walls 54 connected thereto out-side of the mandrel pitch circle 50 is thus equal to the total cross-sectional area of the inner land 52 and the portions of the two side walls 54 connected thereto inwardly of the mandrel pitch `circle. Most preferably, the splines 44 are formed such that the portions thereof inward of the mandrel pitch circle 50 are congruent to the portions thereof outward of the mandrel pitch circle.
It should be mentioned that while the term "thin-wall" is defined in standard engineering terminology to mean a round wall having an inner diameter to wall thickness ratio greater than 10, this ratio is much ~ ~7S29~
greater for sleeves splined in accordance with the spline forming process herein disclosed. Normally, this ratio is on the order of 50 or more; for example, an internal diameter of 4 and 1/8 inches and a wall thickness of about 1/16 of an inch is a ratio of 66.
With additional reference to FIGURES 5 and 6, the splining apparatus 20 also includes a mandrel drive gear 60 mounted for rotation about the mandrel axis A
and rotatively fixed to the mandrel 22 in any suitable manner at the rear thereof within the forwardly opening workspace 18. A pair of drive racks 62 are respectively mounted on the pair of slides 28 for movement with the forming racks 24 in a side-by-side relationship. Drive racks 62 mesh with the drive gear 60 such that driving rotation thereof rotates the mandrel 22 in coordination with the forming racks 24 during thè spline forming operation.
As seen in FI~URE 6, the mandrel drive gear 60 includes teeth 64 which have a pitch circle 66 of the same diameter D as the pitch circle of the toothed man-drel and located in a concentric relationship therewithabout the axis of mandrel rotation A. Teeth 68 of the drive racks 62 mesh with the drive gear teeth Ç4 and have associated pitch lines 70 tangent to the pitch circle 66 thereof at a radial location where the cir cumferential rate of movement of the gear teeth is equal to the rectilinear rate of movement of the drive rack teeth.
Best results are achieved when the mandrel 22 il-lustrated in FIGURE 2 has the same number of teeth 40 ~ ~529~
as the number of teeth 64 of the drive 60 illustrated in FIGURE 6. The mandrel teeth are also aligned with the gear teeth such that meshing of each mandrel tooth with the associated forming rack teeth during the splin-ing operation is accompanied by meshing of one of the gear teeth with the associated drive rack teeth.
:, Drive gear 60 illustrated in FIGURE 6 does not have to have the same diameter at the tips of its teeth 64 as the mandrel 22 at the tips of its teeth 40. Only the tooth pitch circle 66 of the drive gear 60 must be the same as the tooth`pitch circle 50 of the mandrel~ As such, in many instances! the drive gear 60 can take the form of a standard gear without the necessity and consequent extra cost of being specially manufactured.
In regard to the pre~erred const~uction of the ~.
teeth of the forming racks, reference should be made to U.S. Patent No. 4,399,678 lssuèd-August 23, 1983 which is being filed concurrently herewith and is as-signed to the assignee of the prèsent invention.
While the best mode for carrying out the invention has been de~cribed in detail, those familiar with the art to which this invention relates-will reco~nize other ~-modes for ~racticing the invention as defined by the 30 following claims. ~; .. . ~ ~ ; .
' ~
~
.
~ ~ . .
Each forming rack 24 includes teeth 42 positioned along its length in an oppositely facing direction from the associated slide 28 for meshing with the mandrel teeth 40 with the thin-wall sleeve 38 located between the meshing teeth. Such meshing of the mandrel teeth 40 and the rack teeth 42 deforms the sleeve 38 at diame-trically opposite upper and lower positions to formsplines or teeth 44 in a rolling manner as the mandrel 22 rotates as shown by arrow 45 in FIGURE 3 in coordi-nation with the movement of each rack 24 in the direc-tion of arrow 36. An end wall 46 of the power trans-mission member 47 is shown in FIGURE 2 and is locatedat one axial end of the sleeve 38. Clamping of end wall 46 against an end of the mandrel 22 securely locates the sleeve 38 on the mandrel as the splines 44 are formed by the meshing rack and mandrel teeth.
~ ~7529~
As illustrated in FIGUR~ 3, each forming rack 24 has an associated tooth pitch line 48 and the mandrel 22 has a tooth pitch circle 50 that is tangent to the rack pitch lines at a radial position where the mandrel teeth 40 have the same circumferential rate of movement as the linear rate of movement of the rack teeth 42.
Pitch circle 50 has a diameter D (FIGURE 4) equal to the mean diameter of the formed splines 44 such that one half of each formed spline is radially inward of the mandrel pitch circle and one half of each formed spline is radially outward of the mandrel pitch circle.
Splines 44 include inner lands 52 located within the mandrel pitch circle 50, side walls 54 extending from the inner lands across the mandrel pitch circle, and outer lands 56 located outwardly of the pitch circle.
Circumferential midpoints of the outer lands 56 are identified in FIGURE 4 by radial lines 58. The total cross-sectional area of the two halves of the outer lands 56 illustrated in FIGURE 4 and the outer por-tions of the two side walls 54 connected thereto out-side of the mandrel pitch circle 50 is thus equal to the total cross-sectional area of the inner land 52 and the portions of the two side walls 54 connected thereto inwardly of the mandrel pitch `circle. Most preferably, the splines 44 are formed such that the portions thereof inward of the mandrel pitch circle 50 are congruent to the portions thereof outward of the mandrel pitch circle.
It should be mentioned that while the term "thin-wall" is defined in standard engineering terminology to mean a round wall having an inner diameter to wall thickness ratio greater than 10, this ratio is much ~ ~7S29~
greater for sleeves splined in accordance with the spline forming process herein disclosed. Normally, this ratio is on the order of 50 or more; for example, an internal diameter of 4 and 1/8 inches and a wall thickness of about 1/16 of an inch is a ratio of 66.
With additional reference to FIGURES 5 and 6, the splining apparatus 20 also includes a mandrel drive gear 60 mounted for rotation about the mandrel axis A
and rotatively fixed to the mandrel 22 in any suitable manner at the rear thereof within the forwardly opening workspace 18. A pair of drive racks 62 are respectively mounted on the pair of slides 28 for movement with the forming racks 24 in a side-by-side relationship. Drive racks 62 mesh with the drive gear 60 such that driving rotation thereof rotates the mandrel 22 in coordination with the forming racks 24 during thè spline forming operation.
As seen in FI~URE 6, the mandrel drive gear 60 includes teeth 64 which have a pitch circle 66 of the same diameter D as the pitch circle of the toothed man-drel and located in a concentric relationship therewithabout the axis of mandrel rotation A. Teeth 68 of the drive racks 62 mesh with the drive gear teeth Ç4 and have associated pitch lines 70 tangent to the pitch circle 66 thereof at a radial location where the cir cumferential rate of movement of the gear teeth is equal to the rectilinear rate of movement of the drive rack teeth.
Best results are achieved when the mandrel 22 il-lustrated in FIGURE 2 has the same number of teeth 40 ~ ~529~
as the number of teeth 64 of the drive 60 illustrated in FIGURE 6. The mandrel teeth are also aligned with the gear teeth such that meshing of each mandrel tooth with the associated forming rack teeth during the splin-ing operation is accompanied by meshing of one of the gear teeth with the associated drive rack teeth.
:, Drive gear 60 illustrated in FIGURE 6 does not have to have the same diameter at the tips of its teeth 64 as the mandrel 22 at the tips of its teeth 40. Only the tooth pitch circle 66 of the drive gear 60 must be the same as the tooth`pitch circle 50 of the mandrel~ As such, in many instances! the drive gear 60 can take the form of a standard gear without the necessity and consequent extra cost of being specially manufactured.
In regard to the pre~erred const~uction of the ~.
teeth of the forming racks, reference should be made to U.S. Patent No. 4,399,678 lssuèd-August 23, 1983 which is being filed concurrently herewith and is as-signed to the assignee of the prèsent invention.
While the best mode for carrying out the invention has been de~cribed in detail, those familiar with the art to which this invention relates-will reco~nize other ~-modes for ~racticing the invention as defined by the 30 following claims. ~; .. . ~ ~ ; .
' ~
~
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~ ~ . .
Claims (5)
1. In apparatus for forming splines in a thin-wall sleeve of a power transmission member, said ap-paratus including a toothed mandrel on which the sleeve is mounted in preparation for splines and a pair of toothed forming racks that are driven in opposite direc-tions on opposite sides of the mandrel such that mesh-ing of the forming racks and the mandrel with the sleeve therebetween forms splines in the sleeve, the improve-ment comprising: the forming racks having associated tooth pitch lines and the mandrel having a tooth pitch circle that is tangent to the forming rack pitch lines and of a diameter equal to the mean diameter of the formed splines such that one half of the formed splines are radially inward of the mandrel pitch circle and one half of the formed splines are radially outward of the mandrel pitch circle.
2. Apparatus as in Claim 1 further including a mandrel drive gear mounted for rotation with the man-drel and having teeth with a tooth pitch circle of the same diameter as the mandrel pitch circle and in a con-centric relationship therewith, and a pair of mandrel drive racks respectively driven with the pair of forming racks and including teeth that mesh with the mandrel drive gear and have tooth pitch lines tangent with the pitch circle of the mandrel drive gear and parallel with the pitch lines of the forming racks.
3. Apparatus as in Claim 2 wherein the mandrel and the mandrel drive gear have the same number of teeth as each other.
4. Apparatus as in Claim 3 wherein the mandrel teeth and the drive gear teeth are aligned with each other.
5. In a machine including lower and upper bases and a rear connecting portion extending therebetween and cooperating therewith to define a forwardly opening workspace, apparatus within the workspace for forming splines in a thin-wall sleeve of a power transmission member, said apparatus including a toothed mandrel on which the sleeve is mounted in preparation for splining and a pair of toothed forming racks that are driven in opposite directions on opposite sides of the mandrel such that meshing of the forming racks and the mandrel with the sleeve therebetween forms splines in the sleeve, the improvement comprising: the forming racks having associated tooth pitch lines and the mandrel having a tooth pitch circle that is tangent to the forming rack pitch lines and of a diameter equal to the mean dia-meter of the formed splines such that one half of the formed splines are radially inward of the mandrel pitch circle and one half of the formed splines are radially outward of the mandrel pitch circle; a mandrel drive gear mounted for rotation with the mandrel to the rear thereof and having teeth with a pitch circle of the same diameter as the mandrel pitch circle and in a con-centric relationship therewith; the mandrel drive gear having the same number of teeth as the mandrel; the teeth of the mandrel and the drive gear being aligned with each other; and a pair of mandrel drive racks re-spectively driven with the pair of forming racks and including teeth that mesh with the mandrel drive gear and have tooth pitch lines tangent with the pitch circle of the mandrel drive gear in a parallel relationship with the pitch lines of the forming racks.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/239,266 US4380918A (en) | 1981-03-02 | 1981-03-02 | Thin-wall spline forming machine |
| US239,266 | 1981-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1175296A true CA1175296A (en) | 1984-10-02 |
Family
ID=22901390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000391463A Expired CA1175296A (en) | 1981-03-02 | 1981-12-03 | Thin-wall spline forming machine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4380918A (en) |
| EP (1) | EP0059584B1 (en) |
| JP (1) | JPS57149040A (en) |
| AT (1) | ATE20199T1 (en) |
| CA (1) | CA1175296A (en) |
| DE (1) | DE3271499D1 (en) |
| IE (1) | IE52129B1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4487047A (en) * | 1981-03-02 | 1984-12-11 | Anderson-Cook, Inc. | Thin-wall spline forming |
| US4610154A (en) * | 1982-02-10 | 1986-09-09 | Ex-Cell-O Corporation | Tooth forming tool with toothless clamping section for splining tubular elements |
| EP0127997B1 (en) * | 1983-06-03 | 1989-07-26 | Ex-Cell-O Corporation | Method and machine for splining clutch hubs with close tolerance spline bellmouth and oil seal surface roundness |
| EP0166758A4 (en) * | 1983-12-21 | 1987-10-19 | Anderson Cook Inc | Threading and projection forming on different size diameters. |
| US4712409A (en) * | 1983-12-21 | 1987-12-15 | Anderson-Cook, Inc. | Threading and projection forming on different size diameters |
| DE19506391B4 (en) * | 1995-02-23 | 2010-01-07 | Allgaier Werke Gmbh | Method for producing a toothed or wavy profile having transmission component of a sheet metal blank |
| US5950471A (en) * | 1998-02-27 | 1999-09-14 | Anderson-Cook, Inc. | Vertical rack spline forming machine |
| US6047581A (en) * | 1998-02-27 | 2000-04-11 | Anderson Cook, Inc. | Drive system for vertical rack spline-forming machine |
| US6634078B1 (en) * | 1999-04-28 | 2003-10-21 | Torque-Traction Technologies, Inc. | Method of manufacturing a splined member for use in a slip joint |
| US7824132B1 (en) * | 2000-08-01 | 2010-11-02 | American Piledriving Equipment, Inc. | Automatically adjustable caisson clamp |
| US7694747B1 (en) | 2002-09-17 | 2010-04-13 | American Piledriving Equipment, Inc. | Preloaded drop hammer for driving piles |
| US8763719B2 (en) | 2010-01-06 | 2014-07-01 | American Piledriving Equipment, Inc. | Pile driving systems and methods employing preloaded drop hammer |
| US8434969B2 (en) | 2010-04-02 | 2013-05-07 | American Piledriving Equipment, Inc. | Internal pipe clamp |
| US9249551B1 (en) | 2012-11-30 | 2016-02-02 | American Piledriving Equipment, Inc. | Concrete sheet pile clamp assemblies and methods and pile driving systems for concrete sheet piles |
| US9371624B2 (en) | 2013-07-05 | 2016-06-21 | American Piledriving Equipment, Inc. | Accessory connection systems and methods for use with helical piledriving systems |
| US10273646B2 (en) | 2015-12-14 | 2019-04-30 | American Piledriving Equipment, Inc. | Guide systems and methods for diesel hammers |
| US10538892B2 (en) | 2016-06-30 | 2020-01-21 | American Piledriving Equipment, Inc. | Hydraulic impact hammer systems and methods |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB794946A (en) * | 1955-12-01 | 1958-05-14 | Michigan Tool Co | Machine for forming toothed elements |
| US3040717A (en) * | 1958-09-08 | 1962-06-26 | Houdaille Industries Inc | Piston-rack rotary actuator |
| GB951562A (en) * | 1961-08-30 | 1964-03-04 | Bishop Arthur E | Improvements in or relating to variable ratio steering gears |
| US3267763A (en) * | 1964-01-23 | 1966-08-23 | Merritt & Co Engineering Ltd | Variable-ratio toothed gearing mechanism |
| US3793866A (en) * | 1972-04-04 | 1974-02-26 | Anderson Cook Inc | Gear forming machines |
| US3982415A (en) * | 1975-01-02 | 1976-09-28 | Anderson-Cook, Inc. | Forming method and machine for splining power transmission members |
| US4028922A (en) * | 1976-10-15 | 1977-06-14 | Anderson-Cook, Inc. | Apparatus and method for splining power transmission members |
| US4155237A (en) * | 1978-01-23 | 1979-05-22 | Anderson-Cook, Inc. | Machine for splining thin-walled power transmission members |
| US4270375A (en) * | 1979-07-10 | 1981-06-02 | Anderson-Cook, Inc. | Forming machine including rotary drive mechanism |
-
1981
- 1981-03-02 US US06/239,266 patent/US4380918A/en not_active Expired - Lifetime
- 1981-11-30 IE IE2801/81A patent/IE52129B1/en unknown
- 1981-12-03 CA CA000391463A patent/CA1175296A/en not_active Expired
- 1981-12-22 JP JP56207941A patent/JPS57149040A/en active Pending
-
1982
- 1982-02-23 AT AT82300904T patent/ATE20199T1/en active
- 1982-02-23 EP EP82300904A patent/EP0059584B1/en not_active Expired
- 1982-02-23 DE DE8282300904T patent/DE3271499D1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0059584B1 (en) | 1986-06-04 |
| IE52129B1 (en) | 1987-06-24 |
| ATE20199T1 (en) | 1986-06-15 |
| DE3271499D1 (en) | 1986-07-10 |
| JPS57149040A (en) | 1982-09-14 |
| IE812801L (en) | 1982-09-02 |
| EP0059584A3 (en) | 1982-10-13 |
| EP0059584A2 (en) | 1982-09-08 |
| US4380918A (en) | 1983-04-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |