SU992130A1 - Collet chuck for clamping ring parts - Google Patents

Description

(54) COLLAPSE FOR CLAMPING RINGS

one

The invention relates to metal working and can be used to clamp ring parts, for example bearing rings.

A known collet chuck for clamping annular parts, comprising a stepped stop attached to the body with elastic petals on the tip, collet and pressure conical element 1.

The disadvantage of the device is the low clamping accuracy of the ring parts.

The purpose of the invention is to improve the accuracy of the clamp.

The goal is achieved by the fact that the end surface of the stepped stop is made inclined, and on the outer surface of the jaws of the collet there is a shoulder with chamfers on both ends, and the outer surface of the elastic petals of the stop is spherical.

This embodiment improves the accuracy of clamping ring parts.

FIG. 1 shows the cartridge, general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 - cartridge with clamped detail.

DETAILS

The collet chuck consists of a case I, to which the stop 2 is rigidly attached (Fig. 1). A package of disc springs 4 and a collet 5 is installed on the cylindrical body of case 3, which has the possibility of

S axial displacement. The stop 2 is made stepped with elastic petals 6 at the end. The end surface of the 7-speed stop 2 is inclined, and on the outer surface of the jaws of the collet 5 there is a shoulder 8 with chamfers on both ends. In the opening of the housing 1 there is a pressure conical element 9 with a jack, a catfish 10. The collet 5 travel is limited by a screw 11, the outer surface of the elastic petals 6 of the anvil 2 can be made spherical with radius R.

The cartridge works as follows.

In the initial position, the pressure conical element 9 is pushed to the right. At the same time, there is a gap a between the surfaces of the cone 10 and 20 of the jaws of the collet 5 (Fig. 1). The workpiece 12 is moved by the operator (or auto operator) in the axial direction, first before contact with the bevel of the collar 8 (Fig. 3) of the jaws of the collet 5,

inserting them at the same time, and then before contact with the end surface 7 of the stop 2. In this case, the jaws of the collet 5 assume the initial position. Then, the pressure conical element 9, moving to the left, selects a gap between the cones 10 and the collet 5, and then moves it, compressing the cup springs 54, until the part 12 is securely clamped.

Cutting tools 13 (Fig. 3), mounted on the cross. the machine caliper, the trimming of both ends of the part 12 is made. Then the pressure conical element 9 under the action of the hydraulic system of the machine, and the collet 5 from the force of the compressed disc springs 4 are moved to the right, while the stroke of the collet 5 limits the screw 14 screwed into the body 1 through the slot of the collet 5. The operator (auto operator) removes the part 12 by moving it in the axial direction to the right. In this case, the jaws of the collet 5 first come together and then diverge in the radial direction. The cycle is repeated.

The angle of the cone 10 is determined to be optimal depending on the specific parameters of the cartridge so that the deformation of the collet 5 is minimal with reliable clamping of the part 12.. Technical and economic efficiency in the application of the proposed device is due to the increased accuracy of clamping ring parts.

Claims (2)

1. A collet chuck for clamping ring parts comprising a stepped stop attached to the body with elastic lobes at the end, a collet and a pressure conical element, characterized in that, in order to increase the clamping accuracy, the end surface of the stepped stop inclined, and a collar with chamfers on both ends on the outer surface of the jaws of the collet. 2. The cartridge according to claim 1, is distinguished by the fact that the outer surface of the elastic petals of the support is made spherical. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 730489, cl. B 23 B 31/20, 1978.