CN212350411U

CN212350411U - Tooling for machining section of stepped shaft part

Info

Publication number: CN212350411U
Application number: CN202020038997.0U
Authority: CN
Inventors: 王桂香; 张瀚文
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2021-01-15
Anticipated expiration: 2030-01-07

Abstract

The utility model discloses a frock is used in section processing of step shaft part mainly relates to lathe frock field. Including chuck, clamping jaw and cooperation claw, the clamping jaw is equipped with three one end that sets up at the chuck along chuck circumferencial direction, the cooperation claw includes link, first chuck and second chuck, the link middle part is close to chuck axis one side with the clamping jaw and rotates and be connected, link length direction is the same with chuck axial direction, first chuck sets up one section at the link, the second chuck sets up the other end at the link, first chuck and second chuck extend to chuck axis. The beneficial effects of the utility model reside in that: the clamping precision of the common mechanical chuck can be improved.

Description

Tooling for machining section of stepped shaft part

Technical Field

The utility model relates to a lathe frock field specifically is a frock is used in processing of step shaft part section.

Background

The end face is the reference for axial positioning and measurement of the part, and the part is generally turned out firstly in turning. However, in the case of a high requirement on the overall length of a part, such as an aviation bolt, an elongated shaft part such as an engine crankshaft bolt with a high requirement on weight needs to be aligned with the overall length after the outer circle is finely turned, so that the length error of the part in the same batch is distributed in a smaller tolerance zone. And grinding is needed to be carried out on part of the long shaft pieces after the turning is finished, the machined surface is used as a fine reference, a central hole is drilled on the end face again, and the fine reference is guaranteed to have small relative jump when the shaft pieces are pushed against the central holes. The existing common processing mode is that a copper claw is arranged on a three-claw hydraulic chuck, the hydraulic chuck is tightened, and an inner hole cutter is used for turning the copper claw, so that the diameter of a holding part formed on a processed part is close to that of the copper claw. Hydraulic chuck is more common on the numerical control lathe, but this type of end face machining general process time is shorter, uses the numerical control machine tool to add the processing cost higher, and the common lathe uses mechanical three-jaw chuck, and the processing needs to increase hydraulic chuck and hydraulic power unit, and the cost is too high like this, and the rate of utilization is not high again. Therefore, a tool suitable for a common vehicle is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a frock is used in processing of step shaft part section, it can improve ordinary mechanical chuck's clamping precision.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

the utility model provides a frock is used in section processing of step shaft part, includes chuck, clamping jaw and cooperation claw, the clamping jaw is equipped with the three one end that sets up at the chuck along chuck circumferencial direction, the cooperation claw includes link, first chuck and second chuck, the link middle part is close to chuck axis one side with the clamping jaw and rotates and be connected, link length direction is the same with chuck axial direction, first chuck sets up one section at the link, the second chuck sets up the other end at the link, first chuck and second chuck extend to chuck axis.

The end, far away from the connecting frame, of the first chuck is provided with a first insert, the end, far away from the connecting frame, of the second chuck is provided with a second insert, and the first insert and the second insert are made of red copper materials.

The clamping jaw includes installation claw and removal claw, remove claw and chuck cooperation, it has the mounting groove to open in the one side that the plane screw thread was kept away from to the removal claw, the mounting groove perpendicular with the length direction who removes the claw and run through the removal jack catch, be provided with the installation falcon with mounting groove matched with on the installation claw, the installation falcon cooperatees with the mounting groove.

The mounting jaw is close to chuck center one end and is provided with the groove of stepping down that is parallel with the chuck axis and runs through the mounting jaw, it is provided with first pivot to step down between the groove both sides wall, first pivot perpendicular to chuck axis direction, link middle part and first pivot swivelling joint.

The movable claw is provided with a mounting hole in one face away from the plane threads, the mounting hole is a threaded hole, the mounting hole is respectively arranged on two sides of the mounting groove along the length direction of the movable claw, a through hole is formed in the mounting claw corresponding to the mounting hole, and a bolt is arranged in the through hole and is matched with the mounting hole to fixedly connect the mounting claw and the movable claw.

Contrast prior art, the beneficial effects of the utility model reside in that:

when the clamping device is used, a cylinder part slightly larger than the diameter of a workpiece is firstly clamped by the connecting frame, the length of the cylinder is slightly smaller than the distance between the first clamping head and the second clamping head, and the wall thickness of the cylinder is smaller than the length of the first clamping head or the second clamping head. And at the moment, the moving claw moves towards the center of the chuck, the connecting frame clamps the cylinder, and the first insert and the second insert are turned by the inner hole cutter according to the size of the workpiece to be machined, so that the surfaces of the first insert and the second insert can be well matched with the workpiece. The first insert and the second insert can be respectively positioned on different shaft sections or on the same shaft section. The machining precision of the end face of the workpiece after clamping is higher than that of a common mechanical chuck, so that high-precision cutting can be completed on a common lathe, and the machining cost is reduced.

Drawings

Fig. 1 is a perspective view of the structure of the present invention.

Fig. 2 is a perspective view of the present invention.

Fig. 3 is a perspective view of the structure of the fitting claw, the mounting claw and the moving claw of the present invention.

Fig. 4 is a perspective view of the structure of the fitting claw, the mounting claw and the moving claw of the present invention.

Reference numerals shown in the drawings:

1. a chuck; 2. a mating claw; 3. mounting claws; 4. a movable claw; 5. a bolt; 6. mounting tenons; 7. a yielding groove; 8. a connecting pin; 9. a connecting frame; 10. a first chuck; 11. a second chuck; 12. a first insert; 13. a second insert.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

Example 1:

the end face is the reference for axial positioning and measurement of the part, and the part is generally turned out firstly in turning. However, in the case of a high requirement on the overall length of a part, such as an aviation bolt 5, an elongated shaft part such as an engine crankshaft bolt 5 with a high requirement on weight needs to be aligned with the overall length after the outer circle is finely turned, so that the length error of the part in the same batch is distributed in a smaller tolerance zone. And grinding is needed to be carried out on part of the long shaft pieces after the turning is finished, the machined surface is used as a fine reference, a central hole is drilled on the end face again, and the fine reference is guaranteed to have small relative jump when the shaft pieces are pushed against the central holes. The existing common processing mode is that a copper claw is arranged on a three-claw hydraulic chuck 1, the hydraulic chuck 1 is tightened, and an inner hole cutter is used for turning the copper claw, so that the diameter of a holding part formed on a processed part is close to that of the copper claw. The hydraulic chuck 1 is common on a numerical control lathe, but the general processing time of the end face processing is short, the processing cost is high by using the numerical control lathe, the mechanical three-jaw chuck 1 is used on a common lathe, the hydraulic chuck 1 and a hydraulic pump station are needed to be added for processing, the cost is too high, and the utilization rate is not high. The labor cost of the common lathe is generally 10-15 yuan, and the cost per hour and the breaking cost of the equipment are generally about 20 yuan. The labor hour cost of the numerical control lathe is generally more than 25 yuan, the cost per hour and the breaking cost of the equipment can be different according to different equipment (generally, the rated power of a 16-unit general lathe is 15kwh, and only the electricity charge needs 18 yuan), the general economic type lathe is about 25 yuan, and the middle-grade lathe is about 35 yuan. The end face machining mainly comprises repeated feeding and discharging, the efficiency of the numerical control machine tool is not reflected, and time consumed in the process of clamping parts is mainly spent manually. Therefore, the common lathe is selected to play a great role in saving cost, and the tool is designed aiming at the condition that only the end face needs to be machined.

A tooling for machining the section of a stepped shaft part comprises a chuck 1, a matching claw 2, a mounting claw 3 and a moving claw 4. The chuck 1 is a mechanical chuck 1. Remove claw 4 and be the cuboid structure, the one side of removing claw 4 is plane thread structure, the length direction that removes claw 4 is the same with plane screw thread extending direction, it has the mounting groove to open in the one side that removes claw 4 and keep away from plane screw thread, the mounting groove perpendicular with the length direction who removes claw 4 and run through the removal jack catch, it is provided with the mounting hole to remove claw 4 in the one side of keeping away from plane screw thread, the mounting hole is the screw hole, the mounting hole sets up the both sides at the mounting groove respectively along removing claw 4 length direction.

Remove claw 4 and have threely, a terminal surface on the chuck 1 is provided with three spout along the circumferencial direction equipartition, remove claw 4 and pack into three spout along the circumferencial direction in proper order to with the inside plane screw-thread fit of chuck 1, realize driving three removal claw 4 simultaneously and remove or keep away from chuck 1 center and remove to chuck 1 center.

The mounting claw 3 is of a cuboid structure, a mounting tenon 6 matched with the mounting groove is arranged on the mounting claw 3, a through hole is arranged on the mounting claw 3 corresponding to the mounting hole, a bolt 5 is arranged in the through hole and matched with the mounting hole to fixedly connect the mounting claw 3 with the movable claw 4,

the installation claw 3 is close to chuck 1 center one end and is provided with and parallel and run through the groove 7 of stepping down of installation claw 3 with chuck 1 axis, it is provided with relative swing hole on the wall of 7 both sides in groove to step down, the downthehole connecting pin 8 that is provided with swings, circlip restriction connecting pin 8 is passed through along axial removal at the both ends of connecting pin 8. A first rotating shaft is arranged between two side walls of the abdicating groove 7 and is vertical to the axial direction of the chuck 1,

the cooperation claw 2 includes link 9, first chuck 10 and second chuck 11, link 9 middle part is rotated with connecting pin 8 and is connected, link 9 length direction is the same with the 7 length direction of groove of stepping down, first chuck 10 sets up one section at link 9, second chuck 11 sets up the other end at link 9, first chuck 10 and second chuck 11 extend to chuck 1 axis, the one end that link 9 was kept away from to first chuck 10 is provided with first insert 12, the one end that link 9 was kept away from to second chuck 11 is provided with second insert 13, first insert 12 and second insert 13 all are red copper material, prevent to press from both sides and hinder the work piece.

The mounting claw 3 is easy to detach, so that the mounting claw 3 and the mating claw 2 are used as a whole, and the mating claws 2 with different sizes can be replaced for use only by detaching the mounting claw 3 from the moving claw 4.

When the clamping device is used, a cylindrical part slightly larger than the diameter of a workpiece is clamped by the connecting frame 9, the connecting frame 9 is in a [ -shape, the end face of the concave part on the inner side of the connecting frame is a plane and is used for matching the peripheral side outer wall of the cylindrical part. The length of the cylinder should be slightly less than the distance between the first cartridge 10 and the second cartridge 11 and the wall thickness of the cylinder should be less than the length of the first cartridge 10 or the second cartridge 11. The moving jaw 4 is moved towards the center of the chuck 1, the connecting frame 9 clamps the cylinder, and the first insert 12 and the second insert 13 are lathed according to the size of the workpiece by using an inner hole cutter, so that the surfaces of the first insert 12 and the second insert 13 can be well matched with the workpiece. The first insert 12 and the second insert 13 may be located in different shaft sections or in the same shaft section. The machining precision of the end face of the workpiece after clamping is higher than that of the common mechanical chuck 1, so that high-precision cutting can be finished on a common lathe, and the machining cost is reduced.

Example 2:

different from the embodiment 1, the connecting frame 9 is in a shape of a cross, the middle lower part of the connecting frame 9 is provided with a bend, the bend is an included angle of 120 degrees, the bend of the connecting frame 9 is rotatably connected with the connecting pin 8, the distance between the first chuck 10 and the connecting pin is half of the distance between the second chuck 11 and the connecting pin, and the connecting pin is used for being matched with a workpiece with large diameter change and has a firmer clamping effect.

Claims

1. The utility model provides a frock is used in section processing of step shaft part which characterized in that: including chuck, clamping jaw and cooperation claw, the clamping jaw is equipped with three one end that sets up at the chuck along chuck circumferencial direction, the cooperation claw includes link, first chuck and second chuck, the link middle part is close to chuck axis one side with the clamping jaw and rotates and be connected, link length direction is the same with chuck axial direction, first chuck sets up one section at the link, the second chuck sets up the other end at the link, first chuck and second chuck extend to chuck axis.

2. The tooling for machining the section of the stepped shaft part according to claim 1, characterized in that: the end, far away from the connecting frame, of the first chuck is provided with a first insert, the end, far away from the connecting frame, of the second chuck is provided with a second insert, and the first insert and the second insert are made of red copper materials.

3. The tooling for machining the section of the stepped shaft part as claimed in claim 1 or 2, wherein: the clamping jaw includes installation claw and removal claw, remove claw and chuck cooperation, it has the mounting groove to open in the one side that the plane screw thread was kept away from to the removal claw, the mounting groove perpendicular with the length direction who removes the claw and run through the removal jack catch, be provided with the installation falcon with mounting groove matched with on the installation claw, the installation falcon cooperatees with the mounting groove.

4. The tooling for machining the section of the stepped shaft part according to claim 3, wherein: the mounting jaw is close to chuck center one end and is provided with the groove of stepping down that is parallel with the chuck axis and runs through the mounting jaw, it is provided with first pivot to step down between the groove both sides wall, first pivot perpendicular to chuck axis direction, link middle part and first pivot swivelling joint.

5. The tooling for machining the section of the stepped shaft part according to claim 3, wherein: the movable claw is provided with a mounting hole in one face away from the plane threads, the mounting hole is a threaded hole, the mounting hole is respectively arranged on two sides of the mounting groove along the length direction of the movable claw, a through hole is formed in the mounting claw corresponding to the mounting hole, and a bolt is arranged in the through hole and is matched with the mounting hole to fixedly connect the mounting claw and the movable claw.