SU1606304A1 - Arrangement for pressfitting parts of stud type - Google Patents

Abstract

The invention relates to an assembly production, in particular, to devices for pressing in parts of the type of pins. The purpose of the invention is to expand the technological capabilities of the device. The device contains a stationary power cylinder 1, the rod of which is made in the form of a pusher 2 of variable cross section, as well as a guide bushing 5. The pusher 2 is provided with a sleeve 3 rigidly fixed on it, the internal cavity of which is stepped. The product guide sleeve 5 is fixed on the side of the free end of the pusher 2 at the end of the sleeve-case 4 located in the inner cavity of the sleeve 3 and its outer surface conjugates with the surface of the cavity of a smaller cross section of the sleeve 3, and the inner surface with the surface of the pusher part of the larger section. The movable sleeve-case 4 is provided with at least a pair of coaxial radial windows in which rushes 17 are movable in the radial direction. In addition, the sleeve case 4 is equipped with locking elements 16, spring-loaded in the radial direction and in contact with a recess made on the surface of the pusher portion 2 larger sections. The locking elements provide a non-rigid axial fixation of the pusher 2 relative to the sleeve-housing 4, and the power cylinder 1 is additionally equipped with a driving throttling exhaust mechanism made in the form of a servo cylinder 6. The latter is connected to the power cylinder 1 through a pressure relay, and the movable member of this throttling exhaust mechanism with the outlet 8 of the power cylinder. 1 hp ff, 6 ill.

Description

The invention relates to a press-fit assembly and can be used to press pin-type products.

The purpose of the invention is the expansion of technological capabilities.

FIG. 1 shows the proposed device in the initial position, a general view; in fig. 2 - section A-A in FIG. 1; in fig. 3-device at the time of work, a general view; in fig. 4 shows a section BB in FIG. 3; in fig. 5 - the device at the time of completion of the work, general view; in fig. 6 is a sectional view BB in FIG.

ABOUT

The device for pressing the pin-type products contains a stationary power cylinder 1, the rod of which is made in the form of a variable cross-section rod - a pusher 2 rigidly connected to the sleeve 3, inside which the sleeve-case 4 is arranged for mutual longitudinal movement, the sleeve 5, rigidly mounted on the end of the sleeve-housing 4 from the free end of the pusher 2. The power cylinder 1 is equipped with a throttling exhaust mechanism, made in the form of a servo cylinder 6, the rod 7 of which is coupled with the exhaust 8 of the power cylinder 1. The pusher 2 is rigidly connected to the piston 9 of the power cylinder 1 on one side and has the largest section on this side, on which the groove 10 opposite to the piston is made. On the middle part 11, the plunger 2 has the same section. Two mutually parallel flats 12 and two blind holes for pins 13 are made, rigidly connecting the pusher 2 with the sleeve 3. The free (unfixed) part 14 of the pusher 2 is cylindrical with a diameter equal to the diameter of the pressed product (pin 15). The sleeve 3 seizes the inner surface of the cavity of a smaller section with the outer surface of the sleeve-housing 4. In the body of the sleeve 3 there are through holes for the pins 13. The sleeve-housing 4 with its inner surface is connected to the surface of the part of the pusher 2 of the largest cross section and is loosely fixed on it with the locking elements 16, which are spring-loaded in the radial direction, are located in the radial holes, uniformly made at the end of the sleeve-housing 4 from the side of the power cylinder 1 and are in contact with the annular groove 10. The sleeve-body 4 is provided with two pairs of coaxial radial windows in which there are crumbs 17 having a possibility of movement in the radial direction, and through the longitudinal grooves 18 under the pins 13,

made in the plane perpendicular to the longitudinal axis of the radial windows (the length of the grooves corresponds to the stroke of the pusher 2). On the end surface of each of the crackers 17, from the side of the pusher, a semi-cylindrical groove 19 is made for a part of the pusher of the smallest section and a bevel 20 towards the part of the pusher of the larger section. The device also contains a fixed stop 21, in which the nut .22 is fastened with the assembled tube 23.

The device works as follows.

A working pressure is injected into the rodless cavity of the power cylinder of the cylinder 1, and the pusher 2 moves to the right together with the sleeve 3, the sleeve housing 4 and the product guide sleeve 5 (Fig. 3). When the pressure in this cavity reaches a certain value, the pressure relay (not shown) is triggered and the servo cylinder b rod 7 releases the outlet 8 of the pneumatic cylinder 1 (Fig. 5). The speed of movement, the pusher increases dramatically, it overcomes the force of the springs of the locking elements 17, which release the groove 10 and deprive the sleeve-body of a rigid axial fixation relative to the pusher 2. This gives an additional impetus to the rapid movement of the pusher with significant working force. Further, the pusher moves only together with the sleeve 3. The part 14 of the smallest pusher is located in the annular groove 20 of the crackers 18, which prevents

5 is its bending at the initial moment of pressing in and later in the event of significant bending forces. Upon further movement of the pusher 2 with the sleeve 3, the part 14 of the smallest cross section of the pusher is located in the product guide sleeve 5, and the crumbs 17, interacting with their bevels 20 with the middle part 11 of the pusher 2, move apart in the radial direction, while their ends are from

5 pushers are located on the planes of the lip 12 of the middle part 11 of the pusher, and the ends on the side opposite to the pusher are located in the cavity of the sleeve 3 of the largest cross section.

0

At the end of the stroke of the pusher, the entire pin 15 is pressed into the hole and permanently connects the nut 22 to the tube 23.

The use of the proposed device for pressing in the articles prevents bending (breaking) of the pusher in the event of large bending forces, and thus makes it possible to carry out products of relatively greater length.

Claims (2)

1. A device for pressing in parts of the type of pins, comprising a stationary cylinder mounted on the base, the movable element of which is rigidly connected with a stepped cylindrical pusher, as well as a sleeve located on the pusher for guiding the pressed product, characterized in that it is equipped with a sleeve-body mounted movably at a greater stage of the pusher with at least one pair of coaxial radial windows, crackers made with a bevel and for the sake of Flax recess at a lower level of the pusher and sleeve with a stepped bore, a mating surface at level with the outer surface of the sleeve-body, the crackers are movable in a radial direction ten 15 20  / the housings of the housing and facing their bevels toward the larger step of the pusher, and the sleeve for guiding the pressed product is fixed on the end of the hub of the housing from the free end of the pusher. 2. The device is pop, 1, characterized in that it is provided with clamps made in the form of spring-loaded elements placed in the radial openings of the sleeve-housing, while at a larger stage of the pusher ring groove under said spring-loaded elements of the clamp is made, and the cylinder is equipped with a driving throttling exhaust mechanism, made in the form of a servo cylinder, connected to the power cylinder through a pressure switch, with an outlet in the return cavity of the power cylinder, and a movable the servo-cylinder body is associated with the indicated opening. Fiyo Fig “Vl FIG. 6