CN215391892U

CN215391892U - V-shaped spinning belt pulley positioning tool

Info

Publication number: CN215391892U
Application number: CN202121692279.6U
Authority: CN
Inventors: 孙芽; 鄢荣清; 潘从勇; 贾锋; 刘惠
Original assignee: Dongfeng Xiangyang Spinning Technology Co Ltd
Current assignee: Dongfeng Xiangyang Spinning Technology Co Ltd
Priority date: 2021-07-24
Filing date: 2021-07-24
Publication date: 2022-01-04
Anticipated expiration: 2031-07-24

Abstract

A V-shaped spinning belt pulley positioning tool comprises a hydraulic chuck which is arranged on a female die in a sliding fit manner; the outer end of the hydraulic chuck is circumferentially provided with more than two hydraulic clamping jaws, the inner sides of the hydraulic clamping jaws are in a step shape gradually rising from inside to outside, the positioning heads are fixed at the upper parts of the inner sides of the hydraulic clamping jaws, and the head parts of the positioning heads are matched with the tooth groove profile of the outer wall of the V-shaped spinning belt pulley to be processed; the positioning head comprises a tail part, a connecting neck and a head part which are connected in sequence, and the rear end of the tail part and the lower surface of the tail part are abutted against steps on the inner side of the hydraulic clamping jaw; the head is a V-shaped head formed by an upper inclined plane and a lower inclined plane, and the intersection of the two inclined planes is rounded. The hydraulic chuck can realize the switching among different parts, realizes the multipurpose of a plate, reduces the cost of a die, realizes the linkage of the hydraulic chuck and equipment, and is efficient and safe.

Description

V-shaped spinning belt pulley positioning tool

Technical Field

The utility model belongs to the technical field of machining positioning, and relates to a V-shaped spinning belt pulley positioning tool.

Background

The spinning forming technology can be used for manufacturing an integral hollow rotary part. The V-shaped spinning belt pulley is widely applied in an automobile engine, the inner wall and the outer wall of a tooth groove of the V-shaped spinning belt pulley are both in a tooth groove shape and matched with a V-shaped belt, when the spinning belt pulley is used as a crankshaft belt pulley, the spinning belt pulley is assembled at the top end of a crankshaft to serve as power output for the whole engine, and when the spinning belt pulley is used as a fan, a water pump, a motor and other gear trains, the spinning belt pulley is assembled on a corresponding hub to drive corresponding accessories to rotate.

The inner wall and the outer wall of the V-shaped spinning belt pulley do not have straight edges after the tooth grooves are spun, and the center hole of the spun V-shaped spinning belt pulley cannot be punched by positioning the inner walls of the straight edges.

Therefore, a wheel positioning tool needs to be designed.

Disclosure of Invention

The utility model provides a V-shaped spinning belt pulley positioning tool which is clamped by a hydraulic chuck, can realize quick replacement of parts of different varieties, and is efficient and safe in automatic clamping.

The technical scheme of the utility model is as follows: comprises a hydraulic chuck which is used for being matched on a female die in a sliding way; the outer end of the hydraulic chuck is circumferentially provided with more than two hydraulic clamping jaws, the inner sides of the hydraulic clamping jaws are in a step shape gradually rising from inside to outside, the positioning heads are fixed at the upper parts of the inner sides of the hydraulic clamping jaws, and the head parts of the positioning heads are matched with the tooth groove profile of the outer wall of the V-shaped spinning belt pulley to be processed; the positioning head comprises a tail part, a connecting neck and a head part which are connected in sequence, and the rear end of the tail part and the lower surface of the tail part are abutted against steps on the inner side of the hydraulic clamping jaw; the head is a V-shaped head formed by an upper inclined plane and a lower inclined plane, and the intersection of the two inclined planes is rounded.

An included angle a1 between the upper inclined plane and the upper end face of the connecting neck, an included angle a2 between the lower inclined plane and the lower end face of the connecting neck, and a half of a tooth groove angle a of the belt pulley. The empty division of ability like this, prevent to interfere with the tank bottom, lead to the location inaccurate, upper and lower inclined plane is pressing from both sides tight fit state, and the inclined plane of cooperation in belt pulley tooth's socket will be shorter than the inclined plane of flute angle, and half is 2/3 of two inclined plane lengths of flute angle, mainly also prevents to interfere, leads to the location inaccurate.

The radius of the fillet is larger than that of the top of the tooth socket corner, and the fillet is mainly used for opening in the air and preventing interference.

The connecting neck is narrower than the tail part and is mainly used for empty opening to prevent interference.

And the axis of the female die is superposed with the axis of the hydraulic chuck.

The female die is a stepped cylinder and comprises a small cylindrical section at the upper end and a large cylindrical section at the lower end; the outer wall of the small cylindrical section is spaced from the tooth groove of the V-shaped spinning belt pulley to be processed, so that interference is prevented. The moving stroke of the jaws on the chuck is 7-10 mm. When in positioning, the range of the clamping force between the positioning head and the tooth groove of the V-shaped spinning belt pulley to be processed is 0.5-3 Mpa.

The V-shaped spinning belt pulley to be processed is positioned and spun by the hydraulic clamping jaws on the hydraulic clamping chuck which is matched with the female die in a sliding mode, and then the V-shaped gear groove with the large diameter is used for positioning, a central hole with the small diameter is processed, and the coaxiality error is reduced. By utilizing the positioning blank of the utility model, the coaxiality of the V-shaped spinning belt pulley central hole and the V-shaped tooth groove is good, the small bounce can be ensured in the using process, and the operation is smooth. According to the utility model, the tooth grooves of the V-shaped belt pulley are automatically clamped by the hydraulic clamping jaws to position and punch, so that the defect that the V-shaped spinning belt pulley cannot be positioned when being punched is overcome, and the V-shaped spinning belt pulley can be punched after being spun, thereby overcoming the defects of central hole deformation and large part jumping caused by the fact that the V-shaped spinning belt pulley is punched first and then is spun. The hydraulic chuck not only can realize the switching between the different parts, realizes a dish multi-purpose, reduces the mould cost, and hydraulic chuck and equipment realize the linkage moreover, and is high-efficient safety.

Drawings

FIG. 1 is a state diagram of the use of the present invention;

FIG. 2 is a schematic structural diagram of a hydraulic chuck which is slidably fitted on a female die;

FIG. 3 is a schematic diagram of the structure of a hydraulic chuck and hydraulic jaws;

FIG. 4 is a top view of FIG. 3;

in the figure, 1, an upper template; 2. a die shank; 3. an upper base plate; 4. a fixing plate; 5. a central hole punch; 6. punching heads of bolt holes; 7. a material returning plate; 8. returning rubber; 9. returning the material screw; 10. assembling screws; 11. assembling the pin; 12. a lower template; 13. a female die; 14. a hydraulic chuck; 15. a hydraulic jack catch; 16. assembling screws; 17. assembling the pin; 18. producing a product; 21. the device comprises a fixed seat 22, a lower connecting disc 31, a lower core die 51, an inner core die 52, a positioning groove 53, an ejector 61, an upper connecting disc 71 and an upper core die.

Detailed Description

In fig. 1, an upper die plate 1 with a guide sleeve at the rear side, a die shank 2 for tightly fitting in the upper die plate 1, an upper backing plate 3, a fixing plate 4, a center hole punch 5, a bolt hole punch 6, a stripper plate 7, a polyurethane rubber 8 for stripping, a stripping screw 9, an assembling screw 10 and an assembling pin 11 are assembled together to form an upper die of a punching tool; the central hole punch 6 and the bolt hole punch 6 are assembled in the fixing plate 4 in an interference fit mode, the upper padding plate 3 and the fixing plate 4 are assembled at the central position of the upper die plate 1 through the assembling screw 10 and the assembling pin 11, and the assembling pin 11 is mainly used for preventing the fixing plate 4 from rotating in the working state after assembly. Holes matched with the central hole punch 5 and the bolt hole punch 6 are formed in the middle of the stripper plate 7, a group of bolt holes are uniformly distributed in the outer ring of the stripper plate 7, stripper screws 9 penetrate through polyurethane rubber 8 to assemble the stripper plate 7 on the upper die plate 1, and when certain pressure is applied to the stripper plate 7, the stripper plate 7 can move relative to the upper die plate 1 along the central hole punch 5 and the bolt hole punch 6, so that the purpose of stripping is achieved.

The lower die plate 12 with the guide post on the rear side, the female die 13, the hydraulic chuck 14, the hydraulic clamping jaws 15, the assembling screws 16 and the assembling pins 17 form a lower die, wherein the female die 13 is assembled at the central position of the lower die plate 12 through the assembling screws 16 and the assembling pins 17, and the assembling pins 17 are mainly used for preventing the female die 13 from rotating in a working state after assembly. The hydraulic chuck 14 is in sliding fit on the female die 13, the inner diameter of the hydraulic chuck is subjected to finish turning and is in sliding fit with the outer diameter of the lower end of the female die which is subjected to finish turning in the same way so as to ensure that a central hole of the female die and a chuck jaw are concentric, and the outline of the inclined surface of the head part of the positioning head 151 of the hydraulic jaw 15 is matched with a tooth groove of a workpiece to be processed and is mainly used for positioning a part during punching.

In fig. 2, 3 and 4, the inclined plane profile of the head part of the positioning head 151 of the hydraulic clamping jaw 15 is matched with the tooth groove of a workpiece to be machined, and the inclined plane profile is mainly used for positioning a part during punching. The positioning head 151 comprises a tail part, a connecting neck and a head part which are connected in sequence, and the rear end of the tail part and the lower surface of the tail part are abutted against steps on the inner side of the hydraulic clamping jaw 15; the head is by the V type head that two upper and lower inclined planes formed, the crossing department fillet in two inclined planes, go up the inclined plane and connect neck up end contained angle a1 angle = down inclined plane and be connected neck down end contained angle a2 angle = the half of the tooth socket angle an of belt pulley, the radius of fillet is greater than the fillet at tooth socket angle top, just so can the idle division, prevent to interfere with the tank bottom, lead to the location inaccurate, upper and lower inclined plane is pressing from both sides tight fit state, the inclined plane of cooperation in belt pulley tooth's socket is than the inclined plane of tooth socket angle and will be short, half is 2/3 of two inclined plane lengths in tooth socket angle, mainly also prevent interfering, lead to the location inaccurate, it is narrower to connect the neck, the main function is idle division, prevent interfering.

Claims

1. The utility model provides a V type spinning belt pulley location frock which characterized in that: comprises a hydraulic chuck (14) which is arranged on a female die (13) in a sliding way; the outer end of the hydraulic chuck (14) is circumferentially provided with more than two hydraulic clamping jaws (15), the inner sides of the hydraulic clamping jaws (15) are in a step shape which gradually rises from inside to outside, a positioning head (151) is fixed on the upper part of the inner side of the hydraulic clamping jaws (15), and the head part of the positioning head (151) is matched with the outline of the tooth socket of the outer wall of the V-shaped spinning belt pulley to be processed; the positioning head (151) comprises a tail part, a connecting neck and a head part which are sequentially connected, and the rear end of the tail part and the lower surface of the tail part are abutted against steps on the inner side of the hydraulic clamping jaw (15); the head is a V-shaped head formed by an upper inclined plane and a lower inclined plane, and the intersection of the two inclined planes is rounded.

2. The V-shaped spinning belt pulley positioning tool according to claim 1, characterized in that: an included angle a1 between the upper inclined plane and the upper end face of the connecting neck, an included angle a2 between the lower inclined plane and the lower end face of the connecting neck, and a half of a tooth groove angle a of the belt pulley.

3. The V-shaped spinning belt pulley positioning tool according to claim 1, characterized in that: the radius of the fillet is larger than that of the top of the tooth socket corner.

4. The V-shaped spinning belt pulley positioning tool according to claim 1, characterized in that: the connecting neck is narrower than the tail.

5. The V-shaped spinning belt pulley positioning tool according to claim 1, characterized in that: the axis of the female die (13) is superposed with the axis of the hydraulic chuck (14).

6. The V-shaped spinning belt pulley positioning tool according to claim 1, characterized in that: the female die (13) is a step-shaped cylinder and comprises a small cylindrical section at the upper end and a large cylindrical section at the lower end.