Automobile camshaft forging die and forging method

Abstract

The invention discloses an automobile camshaft forging die and a forging method, and relates to the technical field of forging dies, the automobile camshaft forging die comprises an upper die base and a lower die base, the upper portion of the upper die base and the lower portion of the lower die base are connected with die plates used for being installed on a workbench of a machine tool, and the die plates are connected with the upper die base and the lower die base. Die cavities are formed in the opposite faces of the upper die base and the lower die base correspondingly, and a jacking mechanism used for jacking out forged and pressed finished products is arranged in the lower die base. The problems that in the prior art, in the forging manufacturing process through a forging die, after die casting is completed, due to the fact that the outer wall of a cam shaft is attached to the wall of a die cavity, the cam shaft is inconvenient to clamp through pliers, and then operation is inconvenient during material taking are solved. The cam shaft die-casting die has the advantages that the jacking mechanism is arranged in the lower die, so that after die-casting is completed, the jacking mechanism can automatically jack out the cam shaft, the cam shaft is separated from the die cavity, and workers can conveniently clamp the cam shaft.

Description

Technical Field

[0001] The invention relates to the technical field of forging dies, and in particular to a forging die and a forging method for an automobile camshaft. Background Art

[0002] The automobile camshaft is a component in a piston engine. Its function is to control the opening and closing of the valves. The main body of the camshaft is a cylindrical rod with a length approximately the same as that of the cylinder group. It is covered with several cams for driving the valves.

[0003] In the prior art, camshafts are generally manufactured by forging during the manufacturing process. The steel billet is burned red and then placed in a forging die, and die-casting is performed by closing the upper and lower dies. During the forging manufacturing process using the forging die, the camshaft is generally taken out by the staff using pliers to clamp and take out the camshaft. However, in the actual process, after the die-casting is completed, the outer wall of the camshaft fits against the wall of the mold cavity, making it inconvenient to clamp the camshaft with pliers, which makes it inconvenient to operate when taking out the material.

[0004] In view of the above technical problems, the present invention discloses a forging die and a forging method for an automobile camshaft. The present invention has the advantages that a lifting mechanism is arranged inside the lower die, and after the die-casting is completed, the lifting mechanism can automatically eject the camshaft, so that the camshaft is separated from the die cavity, making it convenient for the staff to clamp the camshaft. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a forging die and a forging method for an automobile camshaft to solve the technical problems in the prior art that, in the forging manufacturing process using a forging die, after die-casting is completed, the outer wall of the camshaft fits against the wall of the die cavity, making it inconvenient to clamp the camshaft with pliers, thereby making it inconvenient to operate when taking out the material. The present invention has the advantages of a lifting mechanism being arranged inside the lower die, and after die-casting is completed, the lifting mechanism can automatically eject the camshaft, so that the camshaft is separated from the die cavity, making it convenient for the staff to clamp the camshaft, etc.

[0006] The present invention is realized by the following technical scheme: The present invention discloses a forging die for an automobile camshaft, comprising an upper die seat and a lower die seat, the upper part of the upper die seat and the lower part of the lower die seat are both connected with a template for mounting on a workbench of a machine tool, a die cavity is respectively provided on the opposite sides of the upper die seat and the lower die seat, a guide column and a guide sleeve are provided between the upper die seat and the lower die seat for limiting, and a lifting mechanism for ejecting a forged finished product is provided inside the lower die seat;

[0007] The lifting mechanism includes an ejector column, a plug-in slot and a control component. The ejector column is retracted and arranged inside the lower mold base. The plug-in slot is opened inside the lower mold base, and the plug-in slot penetrates the bottom cavity wall of the mold cavity of the lower mold base. The ejector column is movably plugged into the plug-in slot, and the top surface of the ejector column smoothly transitions with the curved surface of the bottom wall of the mold cavity of the lower mold base to form a complete curved surface. The ejection of the ejector column is controlled by the control component.

[0008] Furthermore, at least two plug-in grooves are provided, and the plurality of plug-in grooves are evenly distributed along the length direction of the mold cavity of the lower mold base, and the outer wall of the ejector column is fitted and slidably matched with the inner wall of the plug-in groove.

[0009] Furthermore, the control component includes a connecting rod, a connecting plate, a cross plate, a rotating column, a rotating shaft, a clamping block, a drag rod and a rotating part. The ejector column is located at one end of the plug-in slot and is fixedly provided with connecting rods on both sides thereof. The plug-in slot is provided with clearance grooves on both sides thereof. The other end of the connecting rod extends to both sides of the lower mold base through the clearance grooves. A connecting plate is fixedly provided at one end of the connecting rod located on one side of the lower mold base. A cross plate is also fixedly provided on one side of the connecting plate. A rotating column is rotatably provided above the cross plate through a rotating shaft. A clamping block is provided on the outer circumferential wall of the rotating column. The clamping block and the rotating column are arranged to be elastically telescopically connected. The part of the clamping block located on the outer wall of the rotating column is arranged to be triangular. Drag rods matching with the clamping block are provided on both sides of the upper mold base. The rotating part is used to control the rotating column to rotate.

[0010] Furthermore, the tow rod includes a straight rod and a support plate, the straight rod is fixedly connected to the upper mold base, the support plate is fixedly arranged on the outer wall on the side facing the upper mold base at the bottom end of the straight rod, the end face of the support plate facing the upper mold base is slidably fitted with the outer wall of the outer side of the rotating column, the height of the yield groove is greater than the height of the connecting rod, the connecting plate is slidably fitted with the facing surface of the lower mold base, the clamping block is arranged on the side of the rotating column opposite to the lower mold base, the end of the clamping block located at the top of the outside of the rotating column extends longitudinally downward from the outer wall of the rotating column and at the same time extends in the lateral direction away from the outer wall of the rotating column, the upper end of the clamping block located on the outside of the rotating column is a pointed end and the upper end smoothly transitions to the outer wall of the rotating column.

[0011] Furthermore, the rotating part includes a limit column, a lower wedge block, a fixed plate, a limit sleeve and an upper wedge block. The limit column is fixedly arranged above the rotating column and are concentric with each other. The outer wall of the limit column is fixedly arranged with a lower wedge block, and there are multiple lower wedge blocks, and the multiple lower wedge blocks are arranged in a ring array, and a bevel is arranged at one end of the lower wedge block. A fixed plate is fixedly arranged at a position corresponding to the upper end surface of the lower mold base and the rotating column, and the fixed plate is arranged as an L-shaped plate, and a limit sleeve is fixedly arranged on the lower end surface of one end of the fixed plate, and the limit sleeve is arranged on the same vertical axis as the center of the rotating column, the limit column and the limit sleeve are plugged into and matched, and an upper wedge block is fixedly arranged on the outer wall of the limit sleeve, and the upper wedge block is the same in number as the lower wedge block and is arranged in a ring array, the upper wedge block and the lower wedge block are arranged facing each other, and the end of the upper wedge block facing the lower wedge block is also arranged as a bevel.

[0012] Furthermore, a torsion spring is installed at the rotating shaft, and the torsion spring enables the rotating column and the cross plate to be elastically connected.

[0013] Furthermore, a movable groove is provided inside the rotating column, and the movable groove is provided inside one end of the rotating column. An extension groove is provided on one side of the movable groove. A movable plate is laterally movably inserted inside the movable groove. A clamping block is fixedly provided on one side of the movable plate toward the extension groove, and the triangular portion of the clamping block extends to the outside of the rotating column. A spring is provided on the other side of the movable plate.

[0014] A forging method for a camshaft forging die for an automobile comprises the following steps:

[0015] Step 1: Install the upper die base and the lower die base on the machine tool respectively, and then place the red-hot steel billet into the die cavity of the lower die base by clamping it with pliers;

[0016] Step 2: Operate the machine tool so that the upper die seat moves down to close the die, and the upper die seat and the lower die seat close the die to forge the steel billet;

[0017] Step 3: When the upper die seat moves down to close the mold, the straight rod and the support plate move down. When the support plate moves down with the upper die seat, the inner side of the support plate fits with the outer side of the rotating column. As the support plate moves down continuously, the card block can be squeezed into the rotating column by the card block arranged in a triangle, so that the card block shrinks into the rotating column. After that, when the support plate moves to the bottom of the card block, the card block pops out after losing the squeeze of the support plate.

[0018] Step 4: After the forging is completed, the upper die seat moves upward. At the same time, because the support plate moves to the bottom of the clamping block, through the blocking of one end of the bottom of the clamping block, when the upper die seat moves upward, the support plate can drive the cross plate and the connecting plate to move upward through the clamping block, and then drive the connecting rod to move upward, so that the connecting rod drives the ejection column to move upward to eject the finished product;

[0019] Step 5: When the finished product is ejected away from the mold cavity along with the ejection column, the staff clamps the finished product with pliers, the upper mold base continues to move upward and causes the rotating column to continue to move upward, and then the lower wedge block contacts the upper wedge block, and the bevel at one end of the upper wedge block contacts the bevel at one end of the lower wedge block. Since the rotating column is rotatably connected to the cross plate, the lower wedge block is pushed to perform an annular displacement as the lower wedge block continues to move horizontally, causing the rotating column to rotate, and then causing the clamping block to rotate to the side separated from the support plate, thereby losing the limit on the support plate, and the upper mold base is reset;

[0020] Step 5: The staff takes out the finished product using pliers.

[0021] The present invention has the following advantages:

[0022] The present invention provides an ejection mechanism, so that after each forging is completed, in the process of the upper die seat being reset and moved upward, the upper die seat can be moved upward to drive the ejection column to move upward, and then the finished product in the die cavity can be ejected by the ejection column, so that the finished product can be lifted above the lower die seat, and then the finished product is kept away from the lower die cavity, which is convenient for the staff to clamp and take out the finished product with pliers, and avoids the situation that after the die-casting is completed, the outer wall of the camshaft fits the wall of the die cavity, making it inconvenient to clamp the camshaft with pliers, thereby preventing the inconvenience of operating when taking out the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the lower die base of the present invention;

[0025] Figure 3 This is a structural schematic diagram of the support plate of the present invention being located below the clamping block;

[0026] Figure 4 For the present invention Figure 3 A schematic diagram of the local enlarged structure at B;

[0027] Figure 5 For the present invention Figure 1 A local enlarged structural schematic diagram;

[0028] Figure 6 For the present invention Figure 4 A schematic diagram of the local enlarged structure at C;

[0029] Figure 7 It is a schematic diagram of the cross-sectional structure of the rotating column of the present invention.

[0030] In the figure: 1. lower die base; 2. upper die base; 3. template; 4. die cavity; 5. lifting mechanism; 6. guide column; 7. guide sleeve; 8. slider; 9. slide groove; 10. torsion spring; 11. movable groove; 12. extension groove; 13. movable plate; 14. spring; 15. clearance groove; 501. ejector column; 502. plug-in slot; 503. control component; 531. connecting rod; 532. connecting plate; 533. cross plate; 534. rotating column; 535. rotating shaft; 536. block; 537. drag rod; 538. rotating part; 5381. limiting column; 5382. lower wedge block; 5383. fixed plate; 5384. limiting sleeve; 5385. upper wedge block; 5371. straight rod; 5372. support plate. DETAILED DESCRIPTION

[0031] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given. However, the protection scope of the present invention is not limited to the following embodiments. In the description of the present invention, words indicating directions or positional relationships such as "front", "rear", "left", and "right" are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] The embodiment discloses a camshaft forging die for an automobile, such as Figure 1-Figure 7 As shown, it includes an upper die base 2 and a lower die base 1, wherein a template 3 is connected to the upper part of the upper die base 2 and the lower part of the lower die base 1, and is detachably connected by screws, and the template 3 is used to be installed on the workbench of the machine tool, and a mold cavity 4 is respectively opened on the opposite side of the upper die base 2 and the lower die base 1, and the upper die base 2 and the lower die base 1 are molded together, and the steel billet is forged through the mold cavity 4 after the mold is closed. It should be noted that a guide column 6 and a guide sleeve 7 are also provided between the upper die base 2 and the lower die base 1 for limiting. The guide column 6 is arranged on the lower end surface of the template 3 of the upper die base 2, and the guide sleeve 7 is arranged on the upper end surface of the template 3 of the lower die base 1. The sleeve holes of the guide column 6 and the guide sleeve 7 are plugged in and matched to limit the mold closing of the upper die base 2 and the lower die base 1;

[0033] In order to make it easier for the staff to take out the forged products after the forging of the billet is completed, Figure 1 As shown, a lifting mechanism 5 is provided inside the lower die base 1, and the finished product completed by forging inside the lower die cavity 4 is ejected by the lifting mechanism 5, so that the finished product can be lifted above the lower die base 1, and then the finished product is kept away from the lower die cavity 4, making it convenient for the staff to clamp and take out the finished product by pliers.

[0034] Specifically, Figure 1-Figure 5As shown, the lifting mechanism 5 includes an ejector column 501, a plug-in slot 502 and a control component 503, wherein the ejector column 501 is retracted and arranged inside the lower mold base 1 through the plug-in slot 502, and the top end of the ejector column 501 can be extended upward from the mold cavity 4 of the lower mold base 1, thereby ejecting the finished product inside the mold cavity 4. More specifically, a plug-in slot 502 is opened inside the lower mold base 1, and at least two plug-in slots 502 are provided. In this embodiment, two plug-in slots 502 are provided, and the two plug-in slots 502 are respectively arranged at both ends of the mold cavity 4 along the length direction of the mold cavity 4 of the lower mold base 1, and the plug-in slot 502 runs through the lower mold base 1. The bottom cavity wall of the die cavity 4 of the die base 1, and correspondingly, an ejector column 501 is movably inserted in the plug-in groove 502, and the top surface of the ejector column 501 and the bottom wall curved surface of the die cavity 4 of the lower die base 1 smoothly transition to form a complete curved surface, so as to avoid the plug-in groove 502 affecting the forging work. It should be noted that the outer wall of the ejector column 501 fits and slides with the inner wall of the plug-in groove 502, and the ejection of the ejector column 501 is controlled by the control component 503. The control component 503 is configured so that when the upper die base 2 moves down to close the mold and then moves up, the upper die base 2 moves up and drives the ejector column 501 to move up and eject through the control component 503;

[0035] The control assembly 503 includes a connecting rod 531, a connecting plate 532, a cross plate 533, a rotating column 534, a rotating shaft 535, a block 536, a drag rod 537 and a rotating portion 538, wherein connecting rods 531 are fixedly arranged on both sides of one end of each ejection column 501 located inside the plug-in slot 502, and correspondingly, a clearance groove 15 is opened on both sides of each plug-in slot 502, and the other end of the connecting rod 531 extends to both sides of the lower mold base 1 through the clearance groove 15, and the height of the clearance groove 15 is greater than the height of the connecting rod 531, so that the connecting rod 531 can have space for longitudinal movement inside the clearance groove 15, and the end of the connecting rod 531 located on one side of the lower mold base 1 is fixedly arranged with a connecting plate 532, and the connecting rod 531 is fixedly arranged on one end of the lower mold base 1. The connecting plate 532 is slidably matched with the facing surface of the lower die base 1. Specifically, the connecting plate 532 is plugged into and matched with the side wall of the lower die base 1 through the slider 8 and the slide groove 9, and a horizontal plate 533 is fixedly provided on one side of the connecting plate 532, and a rotating column 534 is provided above the horizontal plate 533. A rotating shaft 535 is fixedly provided at the bottom end of the rotating column 534, and the rotating shaft 535 is rotatably connected with the horizontal plate 533, so that the rotating column 534 can rotate above the horizontal plate 533. In addition, a clamping block 536 is provided on the outer wall of the outer circumference of the rotating column 534 and specifically on the side opposite to the side wall of the lower die base 1, and the clamping block 536 and the rotating column 534 are arranged to be elastically telescopically connected, so that the clamping block 536 can be retracted to the inside of the rotating column 534 when squeezed;

[0036] It should be noted that if Figure 1-Figure 7As shown, the portion of the block 536 located on the outer wall of the rotating column 534 is configured as a triangle. Specifically, one end of the block 536 located on the top of the outer side of the rotating column 534 extends longitudinally downward from the outer wall of the rotating column 534 and at the same time extends in the transverse direction toward the outer wall of the principle rotating column 534, so that the end of the block 536 located on the outside of the rotating column 534 presents a tip at the top, and the tip at the top smoothly transitions with the outer wall of the rotating column 534, and drag rods 537 that cooperate with the block 536 are respectively provided on both sides of the upper mold base 2, and the drag rod 537 is specifically configured to include a straight rod 5371 and a support plate 5372, wherein the straight rod 5371 is fixedly connected to the upper mold base 2, and the support plate 5372 is fixedly arranged on the outer wall of the bottom end of the straight rod 5371, and is specifically arranged on the side of the straight rod 5371 facing the lower mold base 1, and the end surface of the support plate 5372 facing the upper mold base 2 is slidably matched with the outer wall of the outer side of the rotating column 534. The support plate 5372, the rotating column 534 and the block 536 are configured such that when the upper die holder 2 moves downward, the support plate 5372 moves downward along with the upper die holder 2, and then when the support plate 5372 moves to the rotating column 534, the inner side surface of the support plate 5372 fits with the outer side surface of the rotating column 534, and as the support plate 5372 continues to move downward, the block 536 arranged in a triangle can be pressed toward the inside of the rotating column 534, thereby making the block 536 36 is retracted to the inside of the rotating column 534, and then, when the support plate 5372 moves to the bottom of the block 536, the block 536 pops out after losing the squeezing of the support plate 5372, and the block 536 is blocked at one end of the bottom of the block 536, so that when the upper die holder 2 moves up, the support plate 5372 can drive the cross plate 533 and the connecting plate 532 to move up through the block 536, and then drive the connecting rod 531 to move up, so that the connecting rod 531 drives the ejection column 501 to move up to eject the finished product;

[0037] When the upper die base 2 drives the support plate 5372 to move upward, and then when the ejection column 501 ejects the finished product, in order to separate the support plate 5372 from the clamping block 536, and thus avoid the connection between the clamping block 536 and the support plate 5372 affecting the reset of the upper die base 2, a rotating part 538 is provided, so that after the ejection column 501 ejects the finished product, the rotating column 534 is rotated by the rotating part 538, so that the clamping block 536 rotates to the opposite direction of the lower die base 1, and the clamping block 536 is separated from the support plate 5372, and then the support plate 5372 directly rises;

[0038] Specifically, Figure 1-Figure 5As shown, the rotating part 538 includes a limiting column 5381, a lower wedge block 5382, a fixing plate 5383, a limiting sleeve 5384 and an upper wedge block 5385. The limiting column 5381 is fixedly arranged above the rotating column 534, and the limiting column 5381 is arranged concentrically with the rotating column 534. A plurality of lower wedge blocks 5382 are arranged in an annular array on the outer wall of the limiting column 5381, and one end of each lower wedge block 5382 is provided with a bevel. In addition, the upper end surface of the lower die seat 1 is connected to the rotating die seat 1. A fixed plate 5383 is fixedly arranged at the corresponding position of the column 534, and a corresponding fixed plate 5383 is arranged above each rotating column 534, and the fixed plate 5383 is arranged as an L-shaped plate, one end of the horizontal plate 533 on the fixed plate 5383 extends to the top of the rotating column 534, and a limiting sleeve 5384 is fixedly arranged on the lower end surface of the horizontal plate 533 on the fixed plate 5383, and the limiting sleeve 5384 is arranged on the same vertical axis as the center of the rotating column 534, and the limiting column 5381 is arranged on the same vertical axis as the center of the rotating column 534. The limiting sleeve 5384 is plug-in matched, and the outer wall of the limiting sleeve 5384 is provided with a plurality of upper wedge blocks 5385 in an annular array, and the upper wedge blocks 5385 are arranged opposite to the lower wedge blocks 5382, and the number of the upper wedge blocks 5385 is the same as that of the lower wedge blocks 5382. In addition, one end of the upper wedge block 5385 facing the lower wedge block 5382 is also provided with a bevel, and the bevel edges of the upper wedge block 5385 and one end of the lower wedge block 5382 are configured so that when the lower wedge block 5382 faces the upper wedge block 5385, the upper wedge block 5385 is provided with a bevel edge. When moving in the direction 85, the bevel at one end of the upper wedge block 5385 contacts the bevel at one end of the lower wedge block 5382. Since the rotating column 534 is rotatably connected to the cross plate 533, the lower wedge block 5382 is pushed to perform an annular displacement as the lower wedge block 5382 continues to move upward, causing the rotating column 534 to rotate, thereby causing the clamping block 536 to rotate to the side separated from the support plate 5372, thereby losing the limit on the support plate 5372, avoiding affecting the reset of the upper die holder 2;

[0039] In addition, a torsion spring 10 is also installed at the rotating shaft 535, through which the rotating column 534 and the cross plate 533 are elastically connected. After the rotating column 534 moves downward to separate the lower wedge block 5382 from the upper wedge block 5385, the rotating column 534 can be reset by the torsion spring 10, so that the clamping block 536 continues to move to the outside and the side opposite to the side wall of the lower mold base 1.

[0040] When the lower wedge block 5382 and the upper wedge block 5385 are in contact, the ejector column 501 can lift the finished product to the top of the lower mold base 1 and away from the mold cavity 4, and when the lower wedge block 5382 and the upper wedge block 5385 are in contact, the ejector column 501 continues to have space to move up, that is, when the lower wedge block 5382 and the upper wedge block 5385 are in contact, there is a distance between the connecting rod 531 and the top wall of the give way groove 15, and then the lower wedge block 5382 continues to move up and contacts the upper wedge block 5385 to rotate, and the clamping block 536 loses the obstruction to the support plate 5372, and the upper mold base 2 is reset. When the lower wedge block 5382 and the upper wedge block 5385 are in contact, the finished product is ejected from the top of the upper mold base 2. During this process, the staff clamps the finished product with pliers, and then the clamping block 536 loses the obstruction to the support plate 5372, and then the ejector column 501 moves down for reset due to its own weight.

[0041] A movable groove 11 is provided inside the rotating column 534. The movable groove 11 is provided inside one end of the rotating column 534, and an extension groove 12 is provided on one side of the movable groove 11. The movable groove 11 is connected to the outside through the extension groove 12. A movable plate 13 is laterally movably inserted inside the movable groove 11. A clamping block 536 is fixedly provided on one side of the movable plate 13 facing the extension groove 12. The triangular portion of the clamping block 536 extends to the outside of the rotating column 534, and a spring 14 is provided on the other side of the movable plate 13. The spring 14 is used to rebound the movable plate 13 toward the extension groove 12.

[0042] A forging method for a camshaft forging die for an automobile comprises the following steps:

[0043] Step 1: Install the upper die base 2 and the lower die base 1 on the machine tool respectively, and then place the red-hot steel billet into the die cavity 4 of the lower die base 1 by clamping it with pliers;

[0044] Step 2: Control the machine tool so that the upper die base 2 moves downward to close the die, and the upper die base 2 closes the die base 1 to forge the steel billet;

[0045] Step 3: When the upper mold base 2 moves down to close the mold, the straight rod 5371 and the support plate 5372 move down. When the support plate 5372 moves down with the upper mold base 2, the inner side of the support plate 5372 fits with the outer side of the rotating column 534 when the support plate 5372 moves to the rotating column 534. As the support plate 5372 continues to move down, the block 536 arranged in a triangle can be used to squeeze the block 536 into the rotating column 534, so that the block 536 shrinks into the rotating column 534. Afterwards, when the support plate 5372 moves to the bottom of the block 536, the block 536 pops out after losing the squeezing of the support plate 5372.

[0046] Step 4: After the forging is completed, the upper die seat 2 moves upward. At the same time, because the support plate 5372 moves to the bottom of the block 536, through the blocking of one end of the bottom of the block 536, when the upper die seat 2 moves upward, the support plate 5372 can drive the cross plate 533 and the connecting plate 532 to move upward through the block 536, and then drive the connecting rod 531 to move upward, so that the connecting rod 531 drives the ejection column 501 to move upward to eject the finished product;

[0047] Step 5: After the finished product is ejected away from the mold cavity 4 along with the ejection column 501, the staff clamps the finished product with pliers, and the upper mold base 2 continues to move upward and causes the rotating column 534 to continue to move upward, and then the lower wedge block 5382 contacts the upper wedge block 5385, and the hypotenuse at one end of the upper wedge block 5385 contacts the hypotenuse at one end of the lower wedge block 5382. Since the rotating column 534 is rotatably connected to the cross plate 533, the lower wedge block 5382 is pushed to perform an annular displacement as the lower wedge block 5382 continues to move horizontally, causing the rotating column 534 to rotate, and then causing the clamping block 536 to rotate to the side separated from the support plate 5372, thereby losing the limit on the support plate 5372, and the upper mold base 2 is reset;

[0048] Step 5: The staff takes out the finished product using pliers.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A forging die for an automobile camshaft, comprising an upper die seat (2) and a lower die seat (1), characterized in that: The upper part of the upper die seat (2) and the lower part of the lower die seat (1) are both connected to a template (3) for mounting on a workbench of a machine tool; the upper die seat (2) and the lower die seat (1) are each provided with a die cavity (4) on the opposite sides thereof; a guide column (6) and a guide sleeve (7) are provided between the upper die seat (2) and the lower die seat (1) for limiting the position; and a lifting mechanism (5) for ejecting a forged finished product is provided inside the lower die seat (1); The ejection mechanism (5) comprises an ejector column (501), a plug-in slot (502) and a control component (503); the ejector column (501) is retracted and arranged inside the lower die base (1); the plug-in slot (502) is provided inside the lower die base (1), and the plug-in slot (502) penetrates the bottom cavity wall of the die cavity (4) of the lower die base (1); the ejector column (501) is movably plugged into the plug-in slot (502), and the top surface of the ejector column (501) smoothly transitions with the curved surface of the bottom wall of the die cavity (4) of the lower die base (1) to form a complete curved surface; the ejection of the ejector column (501) is controlled by the control component (503).

2. The automotive camshaft forging die according to claim 1, characterized in that: At least two of the plug-in grooves (502) are provided, and the plurality of the plug-in grooves (502) are evenly distributed along the length direction of the mold cavity (4) of the lower mold base (1), and the outer wall of the ejection column (501) fits and slides with the inner wall of the plug-in groove (502).

3. The automotive camshaft forging die according to claim 2, characterized in that: The control assembly (503) comprises a connecting rod (531), a connecting plate (532), a transverse plate (533), a rotating column (534), a rotating shaft (535), a block (536), a drag rod (537) and a rotating portion (538); the ejection column (501) is fixedly provided with connecting rods (531) on both sides of one end inside the plug-in slot (502); the plug-in slot (502) is provided with a clearance groove (15) on both sides; the other end of the connecting rod (531) extends to both sides of the lower die base (1) through the clearance groove (15); the end of the connecting rod (531) located on one side of the lower die base (1) is fixedly provided with a connecting rod (531) A plate (532), a transverse plate (533) is fixedly provided on one side of the connecting plate (532), a rotating column (534) is rotatably provided above the transverse plate (533) via a rotating shaft (535), a clamping block (536) is provided on the outer wall of the outer circumference of the rotating column (534), the clamping block (536) and the rotating column (534) are arranged to be elastically telescopically connected, the portion of the clamping block (536) located on the outer wall of the rotating column (534) is arranged to be triangular, and drag rods (537) cooperating with the clamping block (536) are respectively provided on both sides of the upper mold base (2), and the rotating portion (538) is used to control the rotating column (534) to rotate.

4. The automobile camshaft forging die according to claim 3, characterized in that: The drag rod (537) comprises a straight rod (5371) and a support plate (5372), wherein the straight rod (5371) is fixedly connected to the upper die seat (2), and the support plate (5372) is fixedly arranged on the outer wall of the bottom end of the straight rod (5371) facing the upper die seat (2), and the end surface of the support plate (5372) facing the upper die seat (2) is slidably matched with the outer wall of the rotating column (534), the height of the clearance groove is greater than the height of the connecting rod (531), and the connecting plate (532) is connected to the lower die seat (2). The opposing surfaces of the base (1) are slidably matched, the block (536) is arranged on the side of the rotating column (534) opposite to the lower mold base (1), the end of the block (536) located at the top of the outside of the rotating column (534) extends longitudinally downward from the outer wall of the rotating column (534) and at the same time extends in the transverse direction away from the outer wall of the rotating column (534), the upper end of the block (536) located on the outside of the rotating column (534) is a pointed end and the upper end smoothly transitions to the outer wall of the rotating column (534).

5. The automobile camshaft forging die according to claim 4, characterized in that: The rotating part (538) includes a limiting column (5381), a lower wedge block (5382), a fixing plate (5383), a limiting sleeve (5384) and an upper wedge block (5385). The limiting column (5381) is fixedly arranged above the rotating column (534) and is concentric with each other. The outer wall of the limiting column (5381) is fixedly arranged with a lower wedge block (5382), and a plurality of lower wedge blocks (5382) are arranged in a ring array. One end of the lower wedge block (5382) is provided with a bevel. The fixing plate (5383) is fixedly arranged at a position corresponding to the rotating column (534) on the upper end surface of the lower mold base (1). The plate (5383) is configured as an L-shaped plate, and a limiting sleeve (5384) is fixedly provided on the lower end surface of one end of the fixed plate (5383), and the limiting sleeve (5384) is arranged on the same vertical axis as the center of the rotating column (534), the limiting column (5381) and the limiting sleeve (5384) are plugged into each other, and an upper wedge block (5385) is fixedly provided on the outer wall of the limiting sleeve (5384), and the upper wedge blocks (5385) and the lower wedge blocks (5382) are the same in number and are arranged in a circular array, the upper wedge blocks (5385) and the lower wedge blocks (5382) are arranged opposite to each other, and the end of the upper wedge block (5385) facing the lower wedge block (5382) is also configured as a hypotenuse.

6. The automobile camshaft forging die according to claim 5, characterized in that: A torsion spring (10) is also installed at the rotating shaft (535), and the torsion spring (10) enables the rotating column (534) and the horizontal plate (533) to be elastically connected.

7. The automobile camshaft forging die according to claim 6, characterized in that: A movable groove (11) is provided inside the rotating column (534), and the movable groove (11) is provided inside one end of the rotating column (534). An extension groove (12) is provided on one side of the movable groove (11). A movable plate (13) is inserted into the movable groove (11) in a transverse and movable manner. A clamping block (536) is fixedly provided on one side of the movable plate (13) facing the extension groove (12), and a triangular portion of the clamping block (536) extends to the outside of the rotating column (534). A spring (14) is provided on the other side of the movable plate (13).

8. A forging method for an automobile camshaft forging die according to claim 7, characterized in that: The following steps are involved: Step 1: Install the upper die base (2) and the lower die base (1) on the machine tool respectively, and then place the red-hot steel billet into the die cavity (4) of the lower die base (1) by clamping it with pliers; Step 2: Control the machine tool so that the upper die base (2) moves downward to close the die, and the upper die base (2) and the lower die base (1) close the die to forge the steel billet; Step 3: When the upper mold base (2) moves down to close the mold, the straight rod (5371) and the support plate (5372) move down. When the support plate (5372) moves down with the upper mold base (2), the inner side surface of the support plate (5372) fits with the outer side surface of the rotating column (534), and as the support plate (5372) continues to move down, the block (536) arranged in a triangle can be used to squeeze the block (536) into the rotating column (534), so that the block (536) shrinks into the rotating column (534). Afterwards, when the support plate (5372) moves to the bottom of the block (536), the block (536) pops out after losing the squeezing of the support plate (5372). Step 4: After the forging is completed, the upper die seat (2) moves upward, and at the same time, because the support plate (5372) moves to the bottom of the block (536), through the blocking of the bottom end of the block (536), when the upper die seat (2) moves upward, the support plate (5372) can drive the cross plate (533) and the connecting plate (532) to move upward through the block (536), and then drive the connecting rod (531) to move upward, so that the connecting rod (531) drives the ejection column (501) to move upward to eject the finished product; Step 5: After the finished product is ejected away from the mold cavity (4) along with the ejection column (501), the staff clamps the finished product with pliers, and the upper mold base (2) continues to move upward and causes the rotating column (534) to continue to move upward, and then the lower wedge block (5382) contacts the upper wedge block (5385), and the beveled edge of one end of the upper wedge block (5385) contacts the beveled edge of one end of the lower wedge block (5382). Since the rotating column (534) is rotatably connected to the cross plate (533), the lower wedge block (5382) is pushed to perform a circular displacement as the lower wedge block (5382) continues to move horizontally, causing the rotating column (534) to rotate, and then causing the clamping block (536) to rotate to the side separated from the support plate (5372), thereby losing the limit on the support plate (5372), and the upper mold base (2) is reset; Step 5: The staff takes out the finished product using pliers.

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