DE1237879B - Workpiece rotary table that can be switched step by step with electrical triggering of a machining process - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B23d

German class: 49 c -31/01

Number: 1237 879

File number: H32698Ib / 49c

Filing date: March 15, 1958

Open date: March 30, 1967

The invention relates to a step-by-step switchable workpiece rotary table with electrical actuation a machining process.

When machining workpieces with the greatest precision, it is necessary that only after fixing of the workpiece table triggers the control signal for a machining process that is now to be carried out will. There are already known arrangements to meet these requirements, in which a The latch that engages in the notches of the rotary table while its position changes to an electrical one Acts switch that triggers the machining process. To carry out the highest precision work However, these devices are not suitable because the switching on of the circuit is not immediate Dependence on the system of the pawl locking the rotary table in a notch on the rotary table takes place, but via auxiliary bodies that have sources of error in the transmission.

The invention is based on the task of switching on the circuit for triggering the To make machining process directly dependent on the latching position of the pawl.

This object is achieved according to the invention in that the pawl as well as the rotary table with its notches are placed in the circuit for the initiation of a machining process and the conductive The pawl is insulated and at its free locking end an insulating roller for the known Way, after an automatic change of direction of rotation of the rotary table, it engages in the notches, on each of which one corresponding to the section of the insulating roller protruding beyond the pawl Recess is provided.

The advantage achieved by the invention is that the attack of the machining tools can only take place on the workpiece after the circuit for initiating the machining process closed is.

An embodiment of the invention is shown schematically in the drawing and is described below described in more detail. It shows

Fig. 1 a part of a workpiece rotary table with notches and corresponding pawl in side view and A b b. 2 is a plan view.

The mode of operation is as follows: The pawl b rests under spring pressure against the rotating detent disk α with the fitting pieces c forming the detents. The insulating roller e, which is held in the pawl, rolls on the rising part of the notch until it has passed the most outstanding, step-by-step switchable workpiece rotary table
with electrical release of a
Machining process

Applicant:

Rheinstahl Henschel Aktiengesellschaft,

Kassel, Henschelstr. 2

Named as inventor:
Joseph Post, Kassel;
Adalbert Kleinsteuber,
Homberghausen (District Kassel)

Claimed priority:

5th European Machine Tool Exhibition

Hanover 1957,

Hanover, opening day September 15, 1957

Point is pressed into the notch bed with the fitting piece c. Each fitting piece c is provided with a recess / for receiving the insulating roller e . As soon as the insulating roller e has reached the area of the recess /, the pawl b comes to rest on the fitting piece c by automatically changing the direction of rotation of the detent disk a , the insulating roller e projecting into the recess /. The circuit is thus closed via c and b and the machining process is only automatically triggered when the rotary table is in the locked position. The eccentric mounting of the pawl b enables readjustment of the workpiece fixtures, which may become necessary, to be carried out without changing the indexing accuracy. The locking pawl δ is secured against making contact when the table is turned further by the insulation ^ and the insulating roller e.

Claims (1)

Claim: Step-by-step switchable workpiece edge table with notches for a locking pawl as a locking device, in which the electrical switching on of a machining process is triggered by the locking movement of the pawl, characterized in that the pawl (δ) as well as the rotary table (ß) with its notches (c) in the Circuit for the initiation of a machining process are laid and the conductive pawl (b) 709 547/130