CN215824167U - Lower female die device for friction press to forge spline hub - Google Patents

Abstract

Lower die device for friction press forging spline hub, including die carrier and die subassembly down, the die carrier includes the lower bolster that the level set up, the connecting hole has been seted up down on the lower bolster, wear to be equipped with in the lower connecting hole with the fixed station threaded connection's of friction press lower fastening bolt, lower fastening bolt is with lower bolster fastening connection at the fixed station top of friction press, the die subassembly sets up at the die plate top, set up the guide hole that communicates with port under the die subassembly in the lower bolster, be equipped with the ejector pin subassembly in the guide hole. The lower die frame and the female die assembly are simple in structure, small in machining difficulty, small in size and low in production cost. The concave die body is a complete revolving body, the processing difficulty is small, the precision of the integral die is easy to guarantee, and the production cost is favorably reduced. The die body is made of an integrated structure, burrs of the spline hub forging in the circumferential direction are avoided, the coaxiality of the overall dimension of the forging can be guaranteed, and the product quality of the spline hub is improved.

Description

Lower female die device for friction press to forge spline hub

Technical Field

The utility model belongs to the technical field of automobile industry, and particularly relates to a lower female die device for a friction press to forge a spline hub.

Background

The splined hub forging is of a hollow tubular construction and, as shown in fig. 1, includes a head portion 43, a conical connecting portion 44 and a long stem portion 45. At present, a flat forging machine is generally adopted to forge a spline hub, the flat forging machine is also called a horizontal forging machine, a tubular blank is horizontally placed, the central lines of a male die device and a female die device are arranged along the horizontal direction, and the flat forging machine has the following problems in the process of forging the spline hub:

1) the die device of the horizontal forging machine has large size, complex structure and complicated die processing process;

2) in the process of installing the die by workers, the coaxiality and the fit clearance between the male die device and the female die device are ensured by adjusting the die and the die frame, and the installation and adjustment have high requirements on the operation of the workers and are relatively complex.

3) The female die of the female die device is arranged on the female die body through fastening screws, each female die tile needs four fastening screws, and eight female die tiles are required to be arranged. The threads on the die body are long in service time and easy to lose effectiveness, and the threads are troublesome to repair and labor-consuming.

4) Limited by the self equipment precision of the horizontal forging machine and the processing precision of the die, after the horizontal forging machine is clamped, a small gap can exist between the female dies on the left side and the right side. In the finish forging process, a small part of the heated pipe blank has metal flowing into a gap, so that burrs are formed, polishing treatment is needed in the later period, the quality of the spline hub forging is influenced, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides the lower female die device for the friction press to forge the spline hub, which has the advantages of simple structure, easiness in manufacturing, difficulty in damage, convenience in operation and low production cost.

In order to solve the technical problems, the utility model adopts the following technical scheme: lower die device for friction press forging spline hub, including die carrier and die subassembly down, the die carrier includes the lower bolster that the level set up, the connecting hole has been seted up down on the lower bolster, wear to be equipped with in the lower connecting hole with the fixed station threaded connection's of friction press lower fastening bolt, lower fastening bolt is with lower bolster fastening connection at the fixed station top of friction press, the die subassembly sets up at the die plate top, set up the guide hole that communicates with port under the die subassembly in the lower bolster, be equipped with the ejector pin subassembly in the guide hole.

The female die assembly comprises a female die body, a pressing ring and a positioning base plate, a groove with an opening at the top is formed in the lower die plate, an annular connecting seat located on the outer side of the groove is integrally arranged on the upper surface of the lower die plate, the positioning base plate is arranged in the groove, a positioning groove is formed in the upper surface of the positioning base plate, the lower end of the female die body is assembled in the positioning groove, the lower end of the female die body is in contact with the bottom of the positioning groove, a positioning hole with the diameter larger than the inner diameter of the female die body is formed in the center of the positioning base plate, the pressing ring is fixedly arranged on the outer wall of the female die body, and the pressing ring is connected with the annular connecting seat through a vertically arranged connecting bolt; the concave die body is internally provided with a through die cavity, the inner diameter of the upper section of the die cavity is larger than that of the middle-lower section, and the upper section of the die cavity and the middle-lower section are in transition by adopting a conical surface structure at the joint.

The ejector pin subassembly includes uide bushing, ejector pin and cushion, and uide bushing upper end excircle an organic whole is equipped with the stop collar, and stop collar excircle diameter equals the locating hole internal diameter of locating backing plate, and uide bushing and stop collar up end flush with locating backing plate up end, and the cushion is circular, and the cushion diameter equals the die cavity middle and lower section aperture of die body, and the cushion setting is inside the die body and sets up at the uide bushing up end, and the ejector pin is vertical to be worn to establish inside the uide bushing.

By adopting the technical scheme, the lower die carrier is arranged on the fixed workbench of the friction press, and the lower die carrier is provided with the female die component which corresponds to the male die component up and down and has a superposed central line. When the spline hub forging operation is carried out, the heated tubular blank is vertically placed inside the female die assembly; and starting the friction press, driving the upper die frame and the male die to move downwards by the lifting slide block, pressing the tubular blank into a spline hub forging in the die cavity in the female die body by the male die, and driving the upper die frame and the male die to move upwards to the original positions and then stopping by the lifting slide block. The top rod assembly arranged at the bottom of the lower die frame is used for ejecting the spline hub forging upwards from the female die assembly, the lower end of the top rod is connected with a cylinder, the cylinder drives the top rod to upwards eject the top block along the guide sleeve, the top block drives the spline hub forging to upwards move along the inner wall of the die cavity of the female die body, and as the die cavity of the female die body is internally provided with the draft angle, after the head of the spline hub forging upwards ejects the female die body, a worker clamps the upper end of the spline hub forging by using a pliers to take out the spline hub forging; meanwhile, the cylinder drives the ejector rod to move downwards, and the cushion block also slides to the upper end part of the guide sleeve along with the sliding.

And a female die body of the female die component is fixed on the lower die plate through a pressing ring, a lower fastening bolt, a positioning base plate and the like. The stop collar of the guide sleeve upper end integrated structure plays a role in supporting the base plate and limiting the axial position of the positioning sleeve.

The die body is the main part of the die assembly, and when the pipe-shaped blank is placed in the die body during forging, the die body plays a role in positioning and forming the blank. The cushion block is matched with a die cavity in the female die body and can move up and down in the female die body. After the forging is finished, the cushion block ejects the spline hub forging upwards under the action of the ejector rod, and the purpose of demolding is achieved.

In conclusion, the lower die frame and the female die assembly are reasonable in structural design, simple in structure, small in machining difficulty, small in size of the die frame and low in production cost. The concave die body is a complete revolving body, the processing difficulty is small, the precision of the integral die is easy to guarantee, and the production cost is favorably reduced. The concave die body is made of an integrated structure, the structure is simple, die accessories are few, and the processing and the installation are convenient. The die body is an integral die, burrs are prevented from being generated on the spline hub forging piece in the circumferential direction, the coaxiality of the overall dimension of the forging piece can be guaranteed, and the product quality of the spline hub is improved.

Drawings

FIG. 1 is a schematic structural view of a prior art splined hub forging;

fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

As shown in fig. 2, the lower female die device for forging the spline hub by the friction press comprises a lower die frame and a female die assembly, wherein the lower die frame comprises a lower die plate 1 which is horizontally arranged, a lower connecting hole 2 is formed in the lower die plate 1, a lower fastening bolt in threaded connection with a fixed workbench of the friction press penetrates through the lower connecting hole 2, the lower die plate 1 is fastened and connected to the top of the fixed workbench of the friction press by the lower fastening bolt, the female die assembly is arranged on the top of the lower die plate 1, a guide hole communicated with a lower port of the female die assembly is formed in the lower die plate 1, and a push rod assembly is arranged in the guide hole.

The female die assembly comprises a female die body 3, a pressing ring 4 and a positioning base plate 5, a groove with an opening at the top is arranged in the lower die plate 1, an annular connecting seat 6 located outside the groove is integrally arranged on the upper surface of the lower die plate 1, the positioning base plate 5 is arranged in the groove, a positioning groove is arranged on the upper surface of the positioning base plate 5, the lower end of the female die body 3 is assembled in the positioning groove, the lower end of the female die body 3 is contacted with the bottom of the positioning groove, a positioning hole with the diameter larger than the inner diameter of the female die body 3 is formed in the center of the positioning base plate 5, the pressing ring 4 is fixedly arranged on the outer wall of the female die body 3, and the pressing ring 4 is connected with the annular connecting seat 6 through a vertically arranged connecting bolt 7; the concave die body 3 is internally provided with a through die cavity, the inner diameter of the upper section of the die cavity is larger than that of the middle-lower section, and the upper section of the die cavity and the middle-lower section are in transition by adopting a conical surface structure at the joint.

The ejector pin subassembly includes uide bushing 8, ejector pin 9 and cushion 10, 8 upper end excircle integrations of uide bushing are equipped with stop collar 11, 11 excircle diameters of stop collar equals the locating hole internal diameter of locating pad 5, uide bushing 8 and 11 up end of stop collar flush with 5 up end of locating pad, cushion 10 is circular, cushion 10 diameters equals die cavity middle and lower section aperture of die cavity 3, cushion 10 sets up inside the die cavity 3 and sets up at 8 up ends of uide bushing, ejector pin 9 is vertical to be worn to establish inside the uide bushing 8.

The lower die frame is arranged on the fixed workbench of the friction press, and the lower die frame is provided with a female die assembly which corresponds to the male die assembly up and down and has a coincident central line. When the spline hub forging operation is carried out, the heated tubular blank 12 is vertically placed in the female die assembly; and starting the friction press, driving the upper die frame and the male die to move downwards by the lifting slide block, pressing the tubular blank 12 in the die cavity in the female die body 3 by the male die to form a spline hub forging, and driving the upper die frame and the male die to move upwards to the original positions by the lifting slide block to stop. An ejector rod 9 assembly arranged at the bottom of the lower die frame ejects the spline hub forging upwards from the female die assembly, the lower end of the ejector rod 9 is connected with a cylinder, the cylinder drives the ejector rod 9 to upwards eject an ejector block along a guide sleeve 8, the ejector block drives the spline hub forging to upwards move along the inner wall of the die cavity of the female die body 3, and after the head of the spline hub forging upwards ejects the female die body 3, a worker clamps the upper end of the spline hub forging by using pliers to take out the spline hub forging as a drawing slope is arranged inside the die cavity of the female die body 3; meanwhile, the cylinder drives the mandril 9 to move downwards, and the cushion block 10 also slides to the upper end part of the guide sleeve 8 along with the movement.

And a concave die body 3 of the concave die component is fixed on the lower template 1 through a pressing ring 4, a lower fastening bolt, a positioning base plate 5 and the like. The limiting sleeve 11 of the upper end integrated structure of the guide sleeve 8 plays a role in supporting the cushion plate and limiting the axial position of the positioning sleeve.

The die body 3 is the main body part of the die assembly, the tubular blank 12 is placed in the die body 3 during forging, and the die body 3 plays a role in positioning and forming the blank. The cushion block 10 is matched with a die cavity in the die cavity 3 and can move up and down in the die cavity 3. After the forging is finished, the cushion block 10 ejects the spline hub forging upwards under the action of the ejector rod 9, so that the purpose of demolding is achieved.

Claims (3)

1. Lower die device for friction press forging spline hub, its characterized in that: including die carrier and die subassembly down, the die carrier includes the lower bolster that the level set up, has seted up the lower connecting hole on the lower bolster, wear to be equipped with in the lower connecting hole with the fixed station threaded connection's of friction press lower fastening bolt, lower fastening bolt is at the fixed station top of friction press with lower bolster fastening connection, the die subassembly sets up at the lower bolster top, set up in the lower bolster with the guide hole of die subassembly lower port intercommunication, be equipped with the ejector pin subassembly in the guide hole.

2. The lower die apparatus for a friction press for forging a splined hub according to claim 1, wherein: the female die assembly comprises a female die body, a pressing ring and a positioning base plate, a groove with an opening at the top is formed in the lower die plate, an annular connecting seat located on the outer side of the groove is integrally arranged on the upper surface of the lower die plate, the positioning base plate is arranged in the groove, a positioning groove is formed in the upper surface of the positioning base plate, the lower end of the female die body is assembled in the positioning groove, the lower end of the female die body is in contact with the bottom of the positioning groove, a positioning hole with the diameter larger than the inner diameter of the female die body is formed in the center of the positioning base plate, the pressing ring is fixedly arranged on the outer wall of the female die body, and the pressing ring is connected with the annular connecting seat through a vertically arranged connecting bolt; the concave die body is internally provided with a through die cavity, the inner diameter of the upper section of the die cavity is larger than that of the middle-lower section, and the upper section of the die cavity and the middle-lower section are in transition by adopting a conical surface structure at the joint.

3. The lower die apparatus for a friction press for forging a splined hub according to claim 2, wherein: the ejector pin subassembly includes uide bushing, ejector pin and cushion, and uide bushing upper end excircle an organic whole is equipped with the stop collar, and stop collar excircle diameter equals the locating hole internal diameter of locating backing plate, and uide bushing and stop collar up end flush with locating backing plate up end, and the cushion is circular, and the cushion diameter equals the die cavity middle and lower section aperture of die body, and the cushion setting is inside the die body and sets up at the uide bushing up end, and the ejector pin is vertical to be worn to establish inside the uide bushing.

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