CN113399694A

CN113399694A - Polygonal soft claw

Info

Publication number: CN113399694A
Application number: CN202110744501.0A
Authority: CN
Inventors: 李琳; 张朝; 凌志国; 张乾让; 雷柱家; 史争峰; 路爱君; 刘向军
Original assignee: AECC Aviation Power Co Ltd
Current assignee: AECC Aviation Power Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-09-17

Abstract

The invention discloses a polygonal soft claw, which comprises a head part and a tail part; the head end face is polygonal, a first threaded through hole is formed in the center of the head end face, the front end of the tail portion is attached to the side edge of the head portion, and a second threaded through hole is formed in the rear end of the tail portion. Through adopting the terminal surface to be polygonal soft claw head, polygonal every angle homoenergetic can regard as a processing part, treat the machined part and carry out the centre gripping, front end through the afterbody and the side laminating of head 1, it is fixed to carry out the angle to head 1, through first screw thread through-hole and second screw thread through-hole, can adopt the bolt to fix head 1 and afterbody, through the polygon transposition, can carry out the centre gripping to not unidimensional work piece, improve the availability factor of soft claw greatly, and simultaneously, when processing not unidimensional work piece, can reduce the production preparation time that the frock was made a round trip to dismantle, improve car machining efficiency greatly. The service life of the soft claw is prolonged by several times, and the production cost is saved.

Description

Polygonal soft claw

Technical Field

The invention belongs to the field of machining and relates to a polygonal soft claw.

Background

The three-jaw chuck is a machine tool accessory for clamping and positioning a workpiece by utilizing radial movement of three movable jaws uniformly distributed on a chuck body, and the jaw head is divided into a hard jaw and a soft jaw.

The common soft claw only has one processing part, even if the soft claw is used for processing workpieces with similar sizes, the size of the soft claw can be changed every time when the claw is bored, the soft claw is slowly scrapped, the service life is short, and the cost for replacing the soft claw is high.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a polygonal soft claw, which increases the processing part of the soft claw and prolongs the service life.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:

a polygonal soft claw comprises a head part and a tail part;

the head end face is polygonal, a first threaded through hole is formed in the center of the head end face, the front end of the tail portion is attached to the side edge of the head portion, and a second threaded through hole is formed in the rear end of the tail portion.

Preferably, the tail part is made by removing the head part of the waste soft claw.

Preferably, the head is of an upper-layer step structure and a lower-layer step structure, the end faces of the two-layer step structures are the same in shape, the end face size of the upper-layer step is larger than that of the lower-layer step, and the side face of the lower-layer step is attached to the front end of the tail.

Preferably, the thickness of the tail is the same as the height of the lower step.

Preferably, one end of the head part is provided with a boss, and one surface of the tail part corresponding to the end surface is provided with a key.

Preferably, each corner of the head is machined with a concave cambered surface.

Preferably, if the number of the edges of the end surface of the head part is even, the front end of the tail part is provided with a V-shaped groove matched with the vertex angle of the head part; if the number of the edges of the head end surface is odd, the front end of the tail part is a plane.

Preferably, the head end face is pentagonal.

Preferably, two or three groups of soft claws are adopted, and the vertex angles of the heads are opposite and are uniformly arranged along the circumferential direction.

Preferably, the first threaded through hole and the second threaded through hole are stepped holes, and the threads are arranged at the small holes of the stepped holes.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the soft claw head with the polygonal end face is adopted, each polygonal angle can be used as a processing part to clamp a workpiece to be processed, the front end of the tail part is attached to the side edge of the head part 1 to fix the angle of the head part 1, the head part 1 and the tail part can be fixed by bolts through the first threaded through hole and the second threaded through hole, workpieces with different sizes can be clamped through polygonal transposition, the use efficiency of the soft claw is greatly improved, meanwhile, when workpieces with different sizes are processed, the production preparation time for the tool to be dismounted back and forth can be reduced, and the turning efficiency is greatly improved. The service life of the soft claw is prolonged by several times, and if the soft claw is scrapped, only the polygonal head needs to be replaced again, so that the production cost is saved.

Furthermore, the waste soft claws are adopted, the head parts of the waste soft claws are removed, and the tail parts with proper sizes are reserved, so that the cost of the processing tool can be obviously reduced, and the production rhythm is accelerated.

Furthermore, the head part and the tail part can be fixed more firmly through the lug bosses and the keys.

Drawings

FIG. 1 is a schematic structural diagram of the front side of a soft claw according to the present invention;

FIG. 2 is a side cross-sectional view of the soft jaw of the present invention;

FIG. 3 is a schematic structural diagram of the front side of the waste soft claw of the present invention;

FIG. 4 is a side sectional view of the waste soft jaw of the present invention;

fig. 5 is a schematic diagram of the matching of a plurality of soft claws of the invention.

Wherein: 1-a head; 2-tail; 3-a first threaded through hole; 4-a second threaded through hole; a 5-bond; 6-boss.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

as shown in fig. 1 and 2, the polygonal soft jaw of the present invention comprises a head portion 1 and a tail portion 2.

The end face of the head part 1 is polygonal, the whole structure is polygonal column-shaped, and a first threaded through hole 3 is formed in the center of the end face of the head part 1 and used for being connected and fixed with the bottom claw; the head 1 is an upper-layer step structure and a lower-layer step structure, the end faces of the two layer step structures are the same in shape, the size of the end face of the upper-layer step is larger than that of the end face of the lower-layer step, the end face of the lower-layer step is located at the center of the end face of the upper-layer step, the step face is arranged, boring can be conveniently conducted, machining time is shortened, and machining efficiency is improved.

The rear end of the tail part 2 is provided with a second threaded through hole 4 which is used for connecting and fixing with the bottom claw; the front end of afterbody 2 sets up with the side laminating of head 1, specifically is the side of lower floor's step and the laminating of 2 front ends of afterbody, and 2 thicknesses of afterbody are the same with the height of lower floor's step, and 2 front ends of afterbody support head 1, prevent that head 1 from taking place to rotate in the course of the work.

If the number of the edges of the end surface of the head part 1 is even, the front end of the tail part 2 is provided with a V-shaped groove matched with the vertex angle of the head part 1; if the number of the edges of the end surface of the head part 1 is odd, the front end of the tail part 2 is a plane. In this embodiment, the end surface of the head portion 1 is pentagonal, and the front end of the tail portion 2 is a plane.

The lower step end face of the head part 1 is provided with a boss 6, and one face of the tail part 2 corresponding to the end face is provided with a key 5, so that the head part 1 and the tail part 2 can be fixed more firmly respectively.

The first threaded through hole 3 and the second threaded through hole 4 are stepped holes, and threads are arranged at small hole parts of the stepped holes and used for arranging the bolt head 1 in the stepped holes so as to avoid interference of the bolt head on other parts in the working process of the machine tool.

The tail part 2 is made by removing the head part 1 of the waste soft claw. As shown in fig. 3 and 4, the head part 1 and the tail part 2 of the waste soft claw are integrated, the head part 1 is removed through the waste soft claw, the usable part of the tail part 2 is left, the pentagonal soft claw head is processed by a bar material, and the pentagonal soft claw head and the usable tail part 2 of the original soft claw are combined into a new soft claw after modification. The self-made soft claw is convenient to process and high in use efficiency. The self-control degree of difficulty is little, realizes easily. This patent technology is showing and is improving the frock utilization ratio, has saved the frock expense. The manufacturing cost of the simple soft claws is 1000 yuan, and the price of 5 pairs of soft claws is 5000 yuan. The cost of the self-made process is about 200, and the manufacturing cost of one pair of soft claws is saved by 4800 yuan, so that the economic benefit is considerable.

Firstly, the waste soft claw 1 pair is taken out, the head part 1 of the waste soft claw is removed, and the tail part 2 with proper size is reserved for standby application.

Secondly, a new soft claw head 1 is manufactured, the structure is selected to be a step pentagon, five positions can be quickly converted by utilizing the pentagon, the outer molded surface can be made into a pentagon with a larger size according to the processing requirement, and the processing range is expanded.

And finally, combining the tail part 2 of the soft claw to be used with the self-made head part 1 of the soft claw, fastening the tail part on the bottom claw by using a key 5 groove and a positioning boss 6 and using a bolt, and finishing the manufacture of a pair of modified new soft claws.

Turning and milling a bar material, self-manufacturing a step pentagonal soft claw head 1, and processing R1, R2, R3, R4 and R5 five round corners on a pentagonal soft claw for distinguishing processing positions. The machining position can be identified by R1, R2, R3, R4, R5. When the R1 position is used, 3R 1 of the split claws are placed at the position to be machined, fastened by bolts and bored to the required size for machining. Similarly, other 4 orientations of R2, R3, R4 and R5 of the head part 1 of the replaceable soft claw can be changed, the whole soft claw can work at the position 5, which is equivalent to the position 5 changed from the original waste soft claw machinable part 1, and the modified soft claw can finish 5 machining with similar size.

Step pentagon soft claw head. The inner step pentagon is mainly used for positioning and conversion, and the outer step pentagon is a working surface. After the soft claw is made into the step shape, the outline size of the outer pentagon can be properly enlarged according to production requirements, and therefore the processing range of the soft claw is enlarged. The functions of quick positioning, transposition, machining range expansion and the like are easily realized by utilizing the step pentagon.

And (3) fastening the self-made pentagonal soft claw head part 1 and the processed standby soft claw tail part 2 on the bottom claw by using bolts, and modifying the soft claw to finish the process.

The head part 1 and the tail part 2 of two or three groups of soft claws need to be arranged on one pair of soft claws, the vertex angles of the head part 1 are opposite and are uniformly arranged along the circumferential direction, the embodiment adopts three groups of soft claws, and the state to be used is shown in figure 5.

The soft claw head 1 bolt is loosened, the machining positions can be quickly switched, and the machining of 5 sizes in total corresponding to five positions R1, R2, R3, R4 and R5 is realized.

In the use process, each angle of the head part is processed with an inwards concave cambered surface. The corresponding relation of the three claw-separating heads 1 is noticed, and the consistent use positions of the three claw-separating heads are ensured. For example: three partial claws are simultaneously positioned at the R1 position or three partial claws are simultaneously positioned at the R2 position.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims

1. The polygonal soft claw is characterized by comprising a head part (1) and a tail part (2);

the end face of the head (1) is polygonal, a first threaded through hole (3) is formed in the center of the end face of the head (1), the front end of the tail (2) is attached to the side edge of the head (1), and a second threaded through hole (4) is formed in the rear end of the tail (2).

2. The polygonal soft claw according to claim 1, wherein the tail part (2) is made of waste soft claws with the head part (1) removed.

3. The polygonal soft claw according to claim 1, wherein the head part (1) is of a two-layer step structure, the end surfaces of the two-layer step structure are the same in shape, the end surface size of the upper layer step is larger than that of the lower layer step, and the side surface of the lower layer step is attached to the front end of the tail part (2).

4. The polygonal soft jaw according to claim 1, characterized in that the thickness of the tail portion (2) is the same as the height of the lower step.

5. The polygonal soft jaw according to claim 1, characterized in that a boss (6) is arranged at one end of the head part (1), and a key (5) is arranged at one surface of the tail part (2) corresponding to the end surface.

6. The polygonal soft jaw according to claim 1, characterized in that each corner of the head (1) is machined with a concave arc.

7. The polygonal soft claw according to claim 1, wherein if the number of the edges of the end surface of the head part (1) is even, the front end of the tail part (2) is provided with a V-shaped groove matched with the vertex angle of the head part (1); if the number of the edges of the end surface of the head part (1) is odd, the front end of the tail part (2) is a plane.

8. The polygonal soft jaw according to claim 1, characterized in that the end surface of the head (1) is pentagonal.

9. The polygonal soft jaw according to claim 1, characterized in that two or three groups of soft jaws are adopted, and the vertex angles of the heads (1) are opposite and uniformly arranged along the circumferential direction.

10. The polygonal soft jaw according to claim 1, wherein the first threaded through hole (3) and the second threaded through hole (4) are stepped holes, and the threads are arranged at the small hole parts of the stepped holes.