RU1814997C - Spring-collet chuck - Google Patents

Abstract

Usage: in machine tools for fixing piece blanks such as bushings or bearing rings on automatic lathes. SUMMARY OF THE INVENTION: In case 1, collets 2,3,4 are placed in one another. The sponges of each collet from the set are placed between the lips of the other. The working surfaces of the jaws of the collets are made stepwise. Moreover, the difference in diameters between adjacent steps of one collet is equal to the product of the number of collets by the difference in diameters between the same steps of neighboring collets. Longitudinal grooves 8 are made in the shank of each collet, and holes 9 are made on the ends of the jaws. A screw groove 7 is made on the stem 6, and protrusions 12 are made on its end. stem 7 rotates 90 °. The protrusions 12 of the rod 6 coincide with the longitudinal grooves 8 on the shank of the collet and the manipulator 11 moves to the right with the collet. As a result, the changeover of the cartridge occurs. 5 ill.

Description

The invention relates to machine tool industry and can be used to fix piece blanks such as bushings or bearing rings on automatic lathes.

The purpose of the invention is to expand technological capabilities by increasing the diameter range of clamped workpieces.

In FIG. 1 shows a longitudinal section AA of a collet chuck .; Fig. 2 - gripper of a manipulator for changing collets; on figs - view along arrow B in fig. 1; figure 4 is a view along arrow B in figure 1; figure 5 - the position of the protrusions of the rod when changing collets.

The cartridge consists of a housing 1, inside of which collets 2, 3, 4 with elastic petals 5 are placed inside one another. In this case, the sponges of each collet from the set are placed between

sponges another. The working surfaces of the collet jaws are made stepwise, and the difference in diameters between adjacent steps of one collet is equal to the product of the number of collets by the difference in diameters between the same steps of adjacent collets. The collet drive includes a rod 6, on which a helical groove 7 is made. Longitudinal grooves are made on the shank of each collet 8. At the ends of the collet lips, holes 9 are made for interacting with tongs-plugs 10 of the manipulator 11, At the end of the rod 6 are made protrusions 12 for engaging with collet shanks. A pin 13 is installed in the housing 1, which is secured by the locking screw 14 and designed to interact with the screw groove 7 of the rod 6. From rotation

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but the collet bodies 1 are held by dowels 15,

The cartridge works as follows. To change the collet with the help of the manipulator 11, tongs-plugs -10 are introduced into the holes 9 of the collet. Then, the stem 6 from the clamp drive moves to the right and, due to the screw groove 7, rotates 90 ° relative to the fixed pin 13 in the housing 1. In this case, the protrusions 12 of the end face of the rod 6 coincide with the longitudinal grooves 8 on the shank of the collet. Then the manipulator 1.1 moves to the right along with the removed collet. As a result, the cartridge is shifted to another stage. When the rod 6 moves to the left, it rotates 90 ° in the opposite direction. With further movement of the rod b to the left, the part is clamped with the necessary collet.

Claims (1)

SUMMARY OF THE INVENTION A collet chuck in which a conical surface is made and a set of collets are arranged coaxially arranged in one another, the jaws of each collet of a set being placed between the jaws of the other, and collet shanks are designed to interact with their movement drive, including a rod, characterized in that, in order to expand technological capabilities by increasing the range of fastened parts, the working surfaces of the collet jaws are stepped, and the diameter difference between adjacent steps of one collet is equal to the product of the number collets for the difference in diameters between the same steps of adjacent collets, while on each collet there is an external conical surface designed for interaction with a conical surface of the body, and longitudinal grooves are made on the shank of each collet, while on the end of the actuator stem there are protrusions designed to interact with the longitudinal grooves of the shanks, and on the outer surface of the stem a helical groove designed to interact with a finger inserted into the cartridge, rigidly fixed in the housing, and the rod is mounted in the housing with the possibility of rotation. View in FSM Fie. 5