CN212577594U

CN212577594U - Special fixture based on crosshead part bores, hole enlargement to hole process

Info

Publication number: CN212577594U
Application number: CN202020217012.0U
Authority: CN
Inventors: 陈建超; 张恺; 李云峰; 白秀勇; 郝欣晴; 赵东云
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2021-02-23
Anticipated expiration: 2030-02-27

Abstract

The utility model discloses a special fixture based on the working procedures of crosshead part drilling and hole expanding, wherein the positioning part comprises a V-shaped block and a screw; the clamping part comprises a front flange cylinder, a bolt I, a spring washer I, a nut I, a clamp seat, a cylinder top, a hinge, a shifting fork and a cylinder; the drill template part comprises a drill bushing, a drill bushing seat, a bolt II, a spring washer II and a taper pin. Crosshead part passes through V type piece location, and the front flange cylinder drives cylinder top and steps up and the cylinder drive shift fork compresses tightly center both sides and guarantees the position degree and provide the precision assurance for boring, hole enlargement to the hole. The utility model discloses simple structure, the volume is less, and is high-efficient convenient, and the practicality is strong, and the precision is high, can once the processing of crosshead part radial through-hole can be accomplished to the clamping.

Description

Special fixture based on crosshead part bores, hole enlargement to hole process

Technical Field

The utility model relates to a cross head anchor clamps field, especially a special fixture to hole process is bored, is expanded based on cross head part.

Background

The crosshead part is mainly a part connecting the connecting rod and the piston rod, and is a joint converting a rotary motion into a reciprocating motion. The crosshead blank is mostly cast by a metal mold machine, and the requirements on the machining precision and the surface roughness of the finished product are strict. Because cross head part bulk production can be aimed at a certain process and design one set of comparatively automatic special fixture and come to reduce process time raise the efficiency to reduce cost. At present, the types of clamps for processing radial holes of crosshead parts are fewer, the processing flow is complicated, the precision is difficult to guarantee, and the consumed time is longer.

A special fixture based on the procedures of drilling and expanding a hole on a crosshead part is an optional method.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the utility model is to provide a special fixture of high-efficient convenient, high accuracy to the hole process based on cross head part bores, expands. Which comprises a positioning part, a clamping part and a drilling template part.

The positioning part is distributed at the lower part of the special fixture, the clamping part is distributed at the middle part of the special fixture, and the drilling template part is distributed at the upper part of the special fixture.

The special fixture positioning part comprises a V-shaped block and a screw, and the V-shaped block of the special fixture positioning part is fixedly connected with the fixture seat through the screw.

Clamping part includes preceding flange cylinder, bolt I, spring washer I, nut I, anchor clamps seat, cylinder top, hinge, shift fork and cylinder, preceding flange cylinder pass through bolt I, spring washer I, nut I fixed mounting on anchor clamps seat, cylinder top fixed mounting is on preceding flange cylinder, the shift fork pass through the hinge and be connected with anchor clamps seat, shift fork one end is passed through the hinge and is connected with cylinder piston rod front end, one end is used for compressing tightly the cross head part.

The special fixture drill jig plate comprises a drill bushing, a drill bushing seat, a bolt II, a spring washer II and a taper pin, the drill bushing is installed in a corresponding hole of the drill bushing seat, and the drill jig plate is connected with the upper end of the fixture seat through the bolt II, the spring washer II and the taper pin.

Compared with the prior art, the utility model have following advantage:

simple structure, the volume is less, and is high-efficient convenient, and the practicality is strong, and the precision is high, can once the clamping can accomplish the processing of the radial through-hole of cross head part.

Drawings

Fig. 1 is a front view of the special fixture for the process of drilling and expanding a hole based on a crosshead part of the utility model.

Fig. 2 is a plan view of the special jig for the hole-expanding process based on the crosshead part of the present invention.

Fig. 3 is a side view of the special jig for the hole-expanding process based on the crosshead part of the present invention.

Fig. 4 is a view of the shift fork of the present invention in the direction of a.

The reference numbers: 1. front flange cylinder, 2, bolts I, 3, spring washers I, 4, nuts I, 5, clamp seats, 6, cylinder heads, 7, V-shaped blocks, 8, screws, 9, crosshead parts, 10, drill bushings, 11, drill bushing seats, 12, bolts II, 13, spring washers II, 14, hinges, 15, shifting forks, 16, cylinders, 17 and taper pins.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

Because drilling process requires highly to the axiality, must guarantee that cross head part 9 can not incline and rotate, chooses the last plane of cross head part 9 for use as the reference surface, and the left side withstands the lower plane of cross head part 9 with preceding flange cylinder 1, makes its right inner wall with anchor clamps tightly laminate, fixes a position the lower plane, uses V type piece 7 to support, fixes a position the excircle surface, restricts five degrees of freedom of cross head part 9 simultaneously, has also guaranteed that cross head part 9 can not incline. Finally, a fork 15 is used to press the inner wall of the crosshead part 9 to ensure the position and limit the rotation. The clamping device is positioned completely, and the stability of drilling machining can be guaranteed.

Example (b): as shown in fig. 1, 2, 3 and 4, a special jig is used in a step of drilling and expanding a hole by using a crosshead member. The positioning part is distributed at the lower part of the special fixture, the clamping part is distributed at the middle part of the special fixture, and the drilling template part is distributed at the upper part of the special fixture. The special fixture positioning part V-shaped block 7 of the positioning part is fixedly connected with the fixture seat 5 through a screw 8. The front flange air cylinder 1 of the clamping part is fixedly arranged on the clamp seat 5 through a bolt I2, a spring washer I3 and a nut I4, the air cylinder top 6 is fixedly arranged on the front flange air cylinder 1, the shifting fork 15 is connected with the clamp seat 5 through a hinge 14, one end of the shifting fork 15 is connected with the front end of a piston rod of the air cylinder 16 through a hinge, and the other end of the shifting fork is used for compressing the crosshead part 9. The drill bushing 10 of the drill plate part is arranged in a corresponding hole of the drill bushing seat 11, and the drill plate is connected with the upper end of the clamp seat 5 through a bolt II12, a spring washer II13 and a taper pin 17.

The working principle is as follows:

when the assembly line operation, the crosshead part 9 falls into the V-shaped block from the front end of the cylinder top 6, and the working piston rod of the front flange cylinder 1 stretches out to drive the cylinder top 6 to push the crosshead part 9 to be fastened with the side wall of the clamp seat 5 through the track of the V-shaped groove. The front end of the cylinder top 6 is designed to be an arc-shaped top made of rubber, scratches are left on the lower plane of the cross head part 9 after contact is avoided, the surface quality of the part is guaranteed, and the defective rate is reduced. The working piston rod of the air cylinder 16 extends out to drive one end of the shifting fork 15 to rotate around the pin shaft of the hinge 14, so that the other end of the shifting fork is tightly pressed against the central position of an inner hole to be drilled and expanded of the crosshead part 9. The drill bit can be extended down through the drill bushing 10 on the drill plate to complete the processing of the radial through hole of the crosshead part 9 at one time. After the drilling and expanding process is finished, the piston rods of the rear air cylinder 16 and the front flange air cylinder 1 are retracted, and the crosshead part 9 is dismounted to finish the process and manufacture of the working procedure.

Claims

1. The utility model provides a special fixture based on cross head part bores, expands hole to hole process, includes location portion, clamping part and jig plate portion, its characterized in that: the positioning part is distributed at the lower part of the special fixture, the clamping part is distributed at the middle part of the special fixture, and the drilling template part is distributed at the upper part of the special fixture;

the positioning part comprises a V-shaped block (7) and a screw (8), and the V-shaped block (7) of the special clamp positioning part is fixedly connected with the clamp seat (5) through the screw (8);

the clamping part comprises a front flange cylinder (1), a bolt I (2), a spring washer I (3), a nut I (4), a clamp seat (5), a cylinder top head (6), a hinge (14), a shifting fork (15) and a cylinder (16), the front flange cylinder (1) is fixedly arranged on the clamp seat (5) through the bolt I (2), the spring washer I (3) and the nut I (4), the cylinder top head (6) is fixedly arranged on the front flange cylinder (1), the shifting fork (15) is connected with the clamp seat (5) through the hinge (14), one end of the shifting fork (15) is connected with the front end of a piston rod of the cylinder (16) through the hinge, and the other end of the shifting fork is used for compressing a part (9);

the drill jig plate part comprises a drill bushing (10), a drill bushing seat (11), a bolt II (12), a spring washer II (13) and a taper pin (17), the drill bushing (10) of the drill jig plate part of the special fixture is installed in a corresponding hole of the drill bushing seat (11), and the drill jig plate is connected with the upper end of the fixture seat (5) through the bolt II (12), the spring washer II (13) and the taper pin (17).