CS242303B1 - Clamping device with automatic ejector - Google Patents

Abstract

The subject of the invention is a clamping device for rotating, piece workpieces with an automatic reversible workpiece ejector, which also serves as a stop when clamping workpieces, and thus this clamp is particularly suitable for semi-automatic or automatic machine tools arranged in automatic cycles or lines, such as turning lines, lines for grinding rotating parts, e.g. bearing rings, etc.

Description

(54) Clamping device with self-ejector

SUMMARY OF THE INVENTION The subject of the invention is a clamping device for rotary, piece workpieces with an automatic return ejector for workpieces, which also serves as a stop for clamping workpieces, making this clamp particularly suitable for semi-automatic or automatic machine tools for grinding rotary parts, eg. bearing rings and the like.

FIG. 1

The subject of the invention is a clamping device with a self-resetting workpiece ejector after release, the device being suitable for clamping workpieces during automatic cycle machining.

Clamping devices used to date contained workpiece ejectors either machined or unmounted, either mechanically operated, which, due to their complexity, are unreliable or fixed, which is not particularly satisfactory in automatic bending or ejection cycles which ejected the workpiece but remained extended only once direction and if no workpiece has been inserted, the ejector has been extended, the machine cycle has continued and the tools caused the machine to crash due to the ejector being extended. Another example of an automatic ejector is used for grinding machines. This system is different from the proposed one due to the operation of the stop by a special cam.

These problems are solved by the present clamping device with an automatic return ejector.

The advantage of this self-ejecting chuck is that when the workpiece is removed, the ejector is ejected and ejects the workpiece from the chuck, and immediately returns to the starting position of the machine when the air pressure drops. The essence of the invention is that the clamping device with an automatic return ejector enables reliable operation of the whole device and eliminates the accident.

An example of the solution of the clamping device with the automatic return ejector according to the invention is shown in the attached drawings. Fig. 1 shows a side view of the device. Fig. 2 shows a front view of the device.

In the body 1, the collet 2 is connected and actuated by a rod 3 into which the return ejector 4 is inserted with a nut 5, which is configured as a piston in a cylinder.

The device operates as follows: the collet 2 in the initial position is pulled out of the body 1 and opened elastically. In this position, the workpiece is inserted into the collet 2 up to the face of the return ejector 4, which is pressed by the spring 6 onto the fixed stop 7. By actuating the actuating mechanism on the rod 3, the collet 2 is retracted into the body 1, clamping the workpiece. After machining, the collet 2 automatically extends and releases the workpiece, the return ejector 4 is forced out of the clamp by compressed air on the nut 5, thereby ejecting the workpiece from the fixture, the return ejector 4 immediately returns to its starting position. This precludes machine failure.

The described principle of the clamping device with the automatic return ejector 4 can be applied in all areas of engineering production, but in particular in semi-automated and automated production.

Claims (2)

ARTICLE Clamping device with automatic ejector consisting of body, collet, fixed stop and ejector spring, characterized in that the collet (2) clamped firmly with the control rod (3) into which it is inserted is clamped in the body (1) return ejector (4) with screwed nut (5). 2 sheets of drawings 242303 FIG. I 242303 FIG. 2 Severografla, n. P., Race 7, Most Price 2.40 KCs