TWI573641B - Camshaft forging cam angle twisting forming module - Google Patents

Description

Camshaft forging cam angle torsion forming module

The invention relates to a camshaft tonnage cam angle torsion forming module, which utilizes a double-acting module forming mechanism and a floating mold base with a spiral guide and a fixed guide block with a spiral groove, and the forged The camshaft is twisted to create a specific angle between the cams, which not only has high production efficiency, but also improves the life of the front engineering forging die and reduces the cost.

Press, the engine camshaft is one of the most important parts of the engine. The engine camshaft is designed to provide valve opening and closing, so the engine camshaft must be designed as a shaft with several different angle cams depending on the number of pistons.

For the forming method of the angle between the cams of the engine camshaft, there are two kinds of direct forging and forging and forging, and the direct forging causes the shape line to change too much, the forging die design is not easy, and the service life of the die is short. The forging die design is easier and the die life is relatively long. Therefore, if it can improve its production efficiency while reducing costs and increasing the life of the mold, it has become the research and development direction of the mold industry.

The inventor specializes in the mold production technology, in order to solve the problem that the direct curve method of the camshaft angle of the engine is low in efficiency, limited in output, relatively high in cost, etc., so it is a hard work to solve the problem, and rely on its own professional With years of research experience, and after several trials, corrections and improvements, the cam angle torsion forming module of the engine camshaft forging of the present invention was finally born.

The invention relates to an engine camshaft forging cam angle torsion forming module, which is coupled with a floating mold base at the bottom of the lower mold of the double acting forming module, and a spiral guide rail is formed on the outer side of the floating mold base, and the floating mold base is formed. The outer guiding block is respectively disposed on the two sides, and the inner side of the outer guiding block is formed with a spiral groove, which is a spiral guide for the floating mold base. The method is that after the hydraulic press is actuated, the piston can be pushed to raise the lower mold and the floating mold base to the highest position, and the convex shape will be formed at this time. The axle forgings are heated to 750 degrees C to 900 degrees C, and then placed in the lower mold cavity. Then, after the upper mold moves downward and the lower mold is closed, the individual cams form a click with the upper and lower mold holes, and then the downward direction of the forging machine is utilized. The force moves the lower mold downward, and the mutual movement of the spiral guide rail of the floating mold base and the spiral groove of the outer guide block causes the lower mold to rotate to drive the cam of the engine camshaft forging to be twisted, so that the individual cams are interposed. A specific angle is created to complete the twisting of the cam angle of the engine camshaft.

The object of the present invention is to provide a cam angle torsion forming module for an engine camshaft forging. Therefore, the present invention uses a module to twist individual cams of a forged camshaft at a high temperature to obtain a camshaft having cams with different angles. Not only the forging die design of the former project is relatively easy, but also the die life is long, which can achieve high production efficiency and low cost.

[this creation]

1‧‧‧Twisted Forming Module

10‧‧‧上模

101‧‧‧Upper template

102‧‧‧ Guide column

11‧‧‧下模

110‧‧‧Floating die holder

1101‧‧‧Spiral guide

111‧‧‧External guide block

1111‧‧‧Spiral groove

112‧‧‧Mold pad

12‧‧‧ positioning ring

13‧‧‧中中

14‧‧‧Piston

15‧‧‧Hydraulic cylinder

16‧‧‧Hydraulic unit

2‧‧‧Camshaft

Figure 1 is a schematic view of the structure of the present invention.

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

Figure 3 is a schematic view of the implementation of the present invention.

Figure 4 is a schematic diagram 2 of the implementation of the present invention.

First, referring to FIG. 1 , which is a schematic structural view of the present invention, the torsional forming module 1 mainly has a mold 10 and a lower mold 11 which can be combined with each other, and a positioning ring 12 is disposed between the two molds. The upper die 10 is fixed on the upper die plate 101, and the upper die plate 101 is coupled to a guide post 102. The die is controlled by the lifting and lowering of the guide post 102 to open and close the mold; the bottom of the lower die 11 is combined with a floating die holder 110 with a guide rail. The two corresponding sides of the lower die 11 are provided with a grooved outer guiding block 111 which is fixed to the inner end of the middle holding member 13. The lower end of the floating mold base 110 is coupled to the piston 14 by a die pad 112. The piston 14 is movable up and down in the hydraulic cylinder 15, and the piston 14 is driven by the external hydraulic unit 16.

2, which is a perspective exploded view of the mold of the present invention, the bottom of the lower mold 11 is coupled with a floating mold base 110 having a guide rail 110, and a spiral guide 1101 is formed on the outer side of the floating mold base 110; Then, a guiding block 11 with a groove is respectively provided 1. The inner guiding block 111 has a spiral groove 1111 on the inner side thereof. When the floating mold base 110 moves downward, the spiral guide 1101 can be locked in the spiral groove 1111, and can be guided by the spiral guide 1101 and the outer guide. The spiral groove 1111 in the block is rotated to drive the lower mold 11 to rotate.

Next, referring to FIG. 3, in the first embodiment of the present invention, when the hydraulic unit 16 starts to actuate the oil and then inputs the oil into the hydraulic cylinder 15, the piston 14 can be driven to actuate the lower mold. 11 is moved upward to a height at which it can be closed with the upper mold 10. At this time, the cam shaft forging 2 is placed in the lower mold 11, and the upper mold 10 and the lower mold 11 are closed.

Next, referring to FIG. 4, which is a schematic diagram of the second embodiment of the present invention, when the upper mold 10 and the lower mold 11 are closed, the downward movement is performed, and at this time, the piston 14 of the hydraulic cylinder 15 is also moved downward at the same time. The hydraulic oil inside the pressure cylinder 15 is pushed back to the oil pressure unit 16 via the pressure relief valve, and when the upper mold 10 and the lower mold 11 are moved downward, the floating mold base 110 also moves downward and simultaneously enters the outer guide block 111. At this time, after the spiral guide 1101 of the floating mold base 110 and the spiral groove 1111 on the inner side of the outer guide block 111 are locked, the floating mold base 110 also rotates when moving downward, and also drives the upper end of the floating mold base 110. The lower mold 11 produces a rotation. When the lower mold 11 is rotated, the positioning ring 12 between the lower mold 10 and the upper mold 10 can maintain the positioning between the lower mold 11 and the upper mold 10 without causing an offset. When the downward movement is completed, since the upper mold 10 is fixed to the upper die plate 101, the camshaft forging 2 in the cavity can be twisted by the rotation of the lower die 11, and the difference in the angle between the cams is generated.

Therefore, the camshaft torsion cam angle torsion forming module 1 of the present invention is attached to the floating mold base 110 at the bottom of the lower mold 11 of the double-acting forming module, and the spiral guide 1101 is provided on the outer side thereof (please refer to FIG. 2 An outer guiding block 111 is disposed on each side of the lower die 11 , and a spiral groove 1111 is disposed on the inner side of the outer guiding block 111 for locking the spiral guide 1101 of the floating die holder 110 . Using the downward force of the forging machine, the lower mold 11 is moved downward, and the lower mold 11 is rotated by the spiral guide 1101 and the spiral groove 1111 to drive the forging of the engine camshaft 2 placed in the cavity to be twisted. In order to make the angle between the cams, and to avoid the normal temperature torsion, the forgings are heated to 750 degrees C to 900 degrees C to be twisted, and the cam angle of the engine camshaft 2 can be rotated. A major breakthrough in the manufacturing method of the engine camshaft 2.

Therefore, by using the camshaft forging member cam angle torsion forming module 1 of the present invention, Less has the following advantages:

(1) The present invention utilizes the double-acting torsional forming module 1 to twist the cam angle after forging the forging of the camshaft 2. Since the cam is at the same angle and the parting line is flat, the forging die design and manufacture are relatively easy. The mold life is also relatively long.

(2) The present invention utilizes a double-acting torsion forming module, which first forges the camshaft 2 into a shape and then twists the cam angle, and has a high production yield, which can effectively reduce the production cost and increase the profit.

(3) The present invention utilizes a screw mechanism to cause the floating die holder 110 to drive the lower die 11 to rotate, and to generate an angle between the cams of the engine camshaft 2, thereby improving production efficiency.

In summary, the present invention rotates the lower mold by the spiral guide of the floating mold base and the spiral groove of the outer guide block, and then the engine camshaft forging is heated to increase the formability and then twist, so that the cam can be used. The difference in angle between them, which can save the cost of the former engineering forging mold, improve the production efficiency and reduce the cost, has been more advanced than the traditional camshaft forging method, and has not been seen in the publication, which has met the patent requirements of the invention. File a patent application according to law.

1‧‧‧Twisted Forming Module

10‧‧‧With the mold cavity

101‧‧‧Upper template

102‧‧‧ Guide column

11‧‧‧With the mold cavity

110‧‧‧Floating die holder with spiral guide

111‧‧‧guided blocks with spiral grooves

112‧‧‧Mold pad

12‧‧‧ positioning ring

13‧‧‧中中

14‧‧‧Piston

15‧‧‧Hydraulic cylinder

16‧‧‧Hydraulic unit

Claims (4)

A camshaft torsion forming cam angle torsion forming module, which utilizes a double acting forming module, cooperates with a spiral guide rail and a spiral groove to perform a cam angle twist of an engine camshaft forging, and the system includes at least an upper die, a lower die, and a floating a mold base and an outer guide block; the floating mold base is coupled to the bottom end of the lower mold, the outer guide block is disposed on the outer ring of the lower mold and the floating mold base; A spiral guide is engaged with the spiral groove of the outer guide block. The camshaft forging cam angle torsion forming module according to claim 1, wherein a positioning ring is disposed between the upper die and the lower die to maintain the closing and positioning of the upper and lower die cavities. The camshaft forging cam angle torsion forming module according to claim 1, wherein the floating mold base is coupled to the piston and supplied by the oil pressure unit for the piston to move. The camshaft forging cam angle torsion forming module according to claim 1 is characterized in that the camshaft forging member is heated to 750 degrees C to 900 degrees C during forming to increase the formability of the object and avoid the phenomenon of torsional fracture.