A mechanical ejector device for forging press

Abstract

The present invention relates to the technical field of ejection mechanisms of forging presses, and specifically discloses a mechanical ejection device of a forging press, including a forging press body for forging workpieces, a molding cavity fixedly installed on the upper surface of the lower end of the forging press body, and an upper mold movable up and down is arranged above the molding cavity, and a hydraulic cylinder is fixedly installed above the upper mold, and a mold plate arranged transversely is installed inside the molding cavity, and an up and down sliding structure is formed between the mold plate and the molding cavity. The mechanical ejection device of the forging press adopts a new structural design, and the driving mechanism drives the transmission screw to rotate by the driven gear while driving, so that the piston plate installed with threads passing through the outside of the transmission screw moves in the negative pressure chamber, so that negative pressure is formed inside the negative pressure chamber, and under the action of the negative pressure, the oxide layer falling off the surface of the workpiece during forging falls into the interior of the forging press body through the dust removal hole, so as to achieve the purpose of cleaning the fallen impurities.

Description

Technical Field

[0001] The invention relates to the technical field of forging presses, in particular to a mechanical ejection device of a forging press. Background Art

[0002] A forging press is a mechanical equipment used for processing metal materials. Its main function is to forge and press metal materials. It is usually composed of a frame, a slide, a transmission system and a control system. It is widely used in aerospace, automobile manufacturing, railway transportation and other industries to produce various metal parts and products. The forging process requires the use of a mold so that the forged product can form a specific shape. Therefore, after the forging is completed, the ejector mechanism needs to be used to eject the product in the mold.

[0003] In the prior art, a Chinese patent with publication number CN112676523A discloses an ejection mechanism of a forging machine, including a bottom frame, bearings are embedded at the center of the inner surface walls on both sides of the bottom frame, a bidirectional threaded rod is embedded between the two bearings, and the outer surfaces of the bidirectional threaded rods are threadedly connected with moving plates near the two end edges, and the outer surface of one side of each moving plate is fixedly connected with a cushion frame, and the two cushion frames are provided with a first limiting groove at the center of the relative outer surfaces. When the metal block is completed by forging, the first oil cylinder is controlled to firmly fit the support cushion block again, and at the same time, by controlling the motor, the bidirectional threaded rod can effectively move the cushion frame out from the bottom of the cushion block, so that the first oil cylinder can effectively lower the use height of the cushion block, and at the same time, the third oil cylinder is controlled to lift the transfer plate with the second support shaft as the rotation center, so that the second oil cylinder can slowly lift the loading plate with the first support shaft as the rotation center, so that the top metal block can slowly slide to the top of the transfer plate.

[0004] The above-mentioned device uses a cylinder to eject the forged product, but in actual use, the metal product needs to be calcined first. Since the temperature of the calcined product is too high, an oxide layer will be produced on the surface. During forging, the oxide layer will fall off and remain in the device. The fallen oxide layer will affect the subsequent normal use.

[0005] In the prior art, a Chinese patent with publication number CN113070434A discloses a forging device that can automatically eject forgings during the forging process, including a frame, the upper end of the frame is rotatably connected to a screw, and a moving block is meshedly connected to the screw. The device drives the moving block to move through the screw, and the moving block can drive the moving wheel to rotate and move at the lower end of the screw during the movement process. During the rotation of the moving wheel, the eccentric rod can be used to drive the movable connecting rod to extend or shorten. When the movable connecting rod is extended, the forging plate can be pushed to move downward between the guide plates, so that the metal material can be forged. The forging device can decompose the vertical force into a part of the left and right forces to avoid excessive force on the forging head and damage. At the same time, there is a certain force buffer between the movable connecting rods, which can also protect the forging plate, thereby achieving a protective effect.

[0006] The above device uses an ejector rod to eject the product, but in actual use, the temperature during forging production is generally 800-1000 degrees Celsius, so if effective cooling measures are not taken, the device may affect its service life due to long-term high temperature. Summary of the invention

[0007] The object of the present invention is to provide a mechanical ejector device for a forging press to solve the problems in the above background technology that the oxide layer of the workpiece falls off and affects the subsequent use and the cooling effect is poor.

[0008] To achieve the above object, the present invention provides the following technical solution: a forging press mechanical ejector device, comprising a forging press body for forging a workpiece, a forming cavity is fixedly installed on the upper surface of the lower end of the forging press body, an upper die movable up and down is arranged above the forming cavity, and a hydraulic cylinder is fixedly installed above the upper die, and further comprising:

[0009] A mold plate arranged transversely is installed inside the molding cavity, and an up-and-down sliding structure is formed between the mold plate and the molding cavity, and a push rod for driving the mold plate to move is fixedly installed on the lower surface of the mold plate, and a return spring is installed outside the lower end of the push rod;

[0010] A cam roller for pressing and pushing the push rod upward is rotatably installed inside the forging press body, and a driving mechanism for driving the cam roller to rotate is installed inside the forging press body;

[0011] A negative pressure mechanism for sucking metal oxides dropped from the forming cavity is arranged inside the forging press body, the negative pressure mechanism comprises a negative pressure bin arranged inside the forging press body and a filter screen fixedly installed on the upper surface of the negative pressure bin, and a vibration mechanism for driving the die plate to vibrate is installed inside the push rod;

[0012] A cooling mechanism for cooling the molding cavity mold body is arranged inside the molding cavity mold body, and the cooling mechanism comprises a tubular cooling groove opened inside the molding cavity mold body, and an atomizing nozzle connected with the cooling groove is fixedly installed on the upper surface of the molding cavity mold body.

[0013] Preferably, the driving mechanism comprises a transmission gear coaxially fixedly mounted on the side of the cam roller, and the side of the transmission gear is meshedly connected with a driving gear, and the driving gear is driven by a driving motor fixedly mounted inside the forging machine body.

[0014] Preferably, a piston plate is slidably installed inside the negative pressure chamber, and a transmission screw is threadedly installed inside the piston plate, and the transmission screw rotates synchronously with the driven gear through a belt, and the driven gear is meshingly connected with the transmission gear.

[0015] Preferably, a dust collection hole is provided in the mold plate which passes through the mold plate from top to bottom, and a sealing block is fixedly installed on the lower surface of the molding cavity.

[0016] Preferably, the sealing block and the dust collecting hole correspond to each other in vertical position, and the height of the sealing block is the same as the height of the dust collecting hole.

[0017] Preferably, the vibration mechanism comprises a vibration block movably mounted inside the push rod, and a pulling spring for driving the vibration block to move upward is fixedly mounted on the upper surface of the vibration block, and the vibration block is made of magnetic material.

[0018] Preferably, wedge-shaped blocks with an inclined structure are fixedly installed at the upper and lower ends inside the push rod, and the vibration block and the adsorption magnetic strip fixedly installed inside the cam roller are magnetically adsorbed to each other.

[0019] Preferably, the cooling tank is communicated with a refrigeration bin disposed inside the forging machine body through a conveying pipe, and a refrigerator is fixedly installed inside the refrigeration bin.

[0020] Preferably, a connecting pipe is fixedly installed through the lower end of the refrigeration bin, and the connecting pipe draws water inside the water storage bin into the refrigeration bin, and a stirring rod is installed inside the refrigeration bin and is fixedly installed coaxially with the transmission screw.

[0021] Preferably, a heat dissipation net corresponding to the driving mechanism is fixedly installed inside the forging machine body, and the heat dissipation net and the conveying pipe are in contact with each other, and a heat dissipation fan corresponding to the heat dissipation net is fixedly installed inside the forging machine body.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the mechanical ejector device of the forging press adopts a new structural design, and its specific contents are as follows:

[0023] 1. The driving mechanism drives the cam roller to rotate, so that the cam roller squeezes the push rod, so that the push rod drives the die plate to move upward, so that the die plate ejects the forged workpiece, which is convenient for subsequent retrieval. The driving mechanism consists of a smaller driving gear and a larger transmission gear. Due to the difference in the number of teeth, the purpose of increasing the torque can be achieved;

[0024] Furthermore, the driving mechanism drives the transmission screw by the driven gear while driving, so that the piston plate installed with threads passing through the outside of the transmission screw moves in the negative pressure chamber, so that negative pressure is formed inside the negative pressure chamber. Under the action of the negative pressure, the oxide layer falling off the surface of the workpiece during forging falls into the inside of the forging machine body through the dust removal hole, thereby achieving the purpose of cleaning the fallen impurities.

[0025] Furthermore, when the cam roller rotates upward, the adsorption effect between the adsorption magnetic strip and the vibration block is used to drive the vibration block to move downward, so that the vibration block hits the wedge block, and the wedge block is used to convert the longitudinal force into a lateral force, so that the mold plate vibrates, so that the product is separated from the mold plate, which is convenient for taking out. When the cam roller rotates downward, the spring is pulled to pull the vibration block upward, generating vibration again, thereby accelerating the falling oxide layer to pass through the dust collection hole.

[0026] 2. Use the conveying pipe to transport the cooling water in the refrigeration bin to the cooling tank, so as to cool down the forming cavity and avoid the subsequent use affected by excessive temperature. The cooling water in the refrigeration bin is stirred by the stirring rod to improve the refrigeration effect of the refrigerator. Finally, the cooling water in the cooling tank is sprayed from the atomizing nozzle to initially cool down the forged product and avoid deformation of the product due to excessive temperature during the subsequent clamping process;

[0027] Furthermore, the middle section of the delivery pipe is curved and fits the surface of the heat dissipation net, thereby cooling the air passing through the heat dissipation net, so that the air flow driven by the heat dissipation fan can better cool the drive mechanism and reduce damage to the drive mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the main structure of the forging machine of the present invention;

[0029] Figure 2 It is a schematic diagram of the cross-sectional structure of the main body of the forging machine of the present invention;

[0030] Figure 3 It is a schematic diagram of the meshing relationship structure of the transmission gears of the present invention;

[0031] Figure 4 It is a schematic diagram of the cross-sectional structure of the molding cavity of the present invention;

[0032] Figure 5 This is a schematic diagram of the sealing block structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the lower surface structure of the mold plate of the present invention;

[0034] Figure 7 This is a schematic diagram of the cam roller structure of the present invention;

[0035] Figure 8 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0036] Fig. 9 This is a schematic diagram of the refrigeration warehouse structure of the present invention;

[0037] Fig.10 It is a schematic diagram of the structure of the delivery pipe of the present invention.

[0038] In the figure: 1. forging machine body; 2. forming cavity; 3. upper die; 4. hydraulic cylinder; 5. die plate; 6. push rod; 7. reset spring; 8. cam roller; 9. transmission gear; 10. driving gear; 11. driving motor; 12. dust collection hole; 13. sealing block; 14. negative pressure chamber; 1401, filter screen; 15. piston plate; 16. transmission screw; 17. driven gear; 18. vibration block; 19. pulling spring; 20. wedge block; 21. adsorption magnetic strip; 22. cooling trough; 23. conveying pipe; 24. refrigeration chamber; 25. refrigerator; 26. connecting pipe; 27. water storage tank; 28. stirring rod; 29. ​​atomizing nozzle; 30. heat dissipation net; 31. cooling fan. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1: Please refer to Figure 1-Figure 3In order to achieve the purpose of automatic ejection, the present embodiment provides the following technical solutions, which specifically disclose: a forging press body 1 for forging workpieces, a forming cavity 2 is fixedly installed on the upper surface of the lower end of the forging press body 1, and an upper die 3 that moves up and down is arranged above the forming cavity 2, and a hydraulic cylinder 4 is fixedly installed above the upper die 3, a transversely arranged die plate 5 is installed inside the forming cavity 2, and an up and down sliding structure is formed between the die plate 5 and the forming cavity 2, and a push rod 6 for driving the movement is fixedly installed on the lower surface of the die plate 5, and a return spring 7 is installed on the outer side of the lower end of the push rod 6, a cam roller 8 for squeezing the push rod 6 to move upward is rotatably installed inside the forging press body 1, and a driving mechanism for driving the cam roller 8 to rotate is installed inside the forging press body 1, and the driving mechanism includes a transmission gear 9 coaxially fixedly installed on the side of the cam roller 8, and the side of the transmission gear 9 is meshed with a driving gear 10, and the driving gear 10 is driven by a driving motor 11 fixedly installed inside the forging press body 1.

[0041] When using the device, first put the calcined metal workpiece into the forming cavity 2 of the forging machine body 1, and then push the upper die 3 downward through the hydraulic cylinder 4, so as to utilize the extrusion force to cooperate with the die plate 5 to realize the forging operation and form the product. After the forging is completed, the upper die 3 moves upward, and the drive motor 11 is turned on at the same time, so that the drive motor 11 drives the driving gear 10 to rotate. At this time, the transmission gear 9 meshing with the driving gear 10 drives the cam roller 8 to rotate. The rotation of the cam roller 8 drives the push rod 6 to move the die plate 5 upward, so that the die plate 5 ejects the forged product, which is convenient for subsequent removal.

[0042] Example 2: Please refer to Figure 2-Figure 7In order to solve the problem that oxides on the surface of metal products fall off into the forming cavity 2 during use of the conventional device and affect the subsequent use, the present embodiment provides the following technical solution, which utilizes the negative pressure generated by the negative pressure mechanism to absorb the oxides that fall off during forging into the forging machine body 1. Specifically disclosed is: a negative pressure mechanism for sucking the metal oxides that fall into the forming cavity 2 is arranged inside the forging machine body 1, the negative pressure mechanism comprises a negative pressure bin 14 provided inside the forging machine body 1 and a filter screen 1401 fixedly installed on the upper surface of the negative pressure bin 14, and a vibration mechanism for driving the mold plate 5 to vibrate is installed inside the push rod 6, a piston plate 15 is slidably installed inside the negative pressure bin 14, and a transmission screw 16 is threadedly installed inside the piston plate 15, and the transmission screw 16 passes through the threaded part of ... The belt rotates synchronously with the driven gear 17, and the driven gear 17 is meshed with the transmission gear 9. A dust collection hole 12 is opened in the mold plate 5 and runs through it from top to bottom. A sealing block 13 is fixedly installed on the lower surface of the molding cavity 2. The positions of the sealing block 13 and the dust collection hole 12 correspond to each other up and down, and the height of the sealing block 13 is the same as the height of the dust collection hole 12. The vibration mechanism includes a vibration block 18 movably installed in the push rod 6, and a pulling spring 19 for driving it to move upward is fixedly installed on the upper surface of the vibration block 18, and the vibration block 18 is set to a magnetic material, and wedge blocks 20 with an inclined structure are fixedly installed at the upper and lower ends of the push rod 6, and the vibration block 18 and the adsorption magnetic strip 21 fixedly installed in the cam roller 8 are magnetically adsorbed to each other.

[0043] During the ejection process, when the cam roller 8 rotates the adsorption magnetic strip 21 upward, the positions of the adsorption magnetic strip 21 and the vibration block 18 correspond to each other, so that under the action of magnetic adsorption, the vibration block 18 moves downward and knocks the wedge block 20, so that the wedge block 20 drives the push rod 6 and the mold plate 5 to vibrate, so that the product is separated from the mold plate 5 to avoid sticking between the two and making it inconvenient to take out. After the product is taken out, the cam roller 8 rotates downward, and the mold plate 5 is reset downward under the action of the reset spring 7. At the same time, the adsorption magnetic strip 21 is separated from the adsorption effect between the vibration block 18. At this time, the vibration block 18 is pulled upward under the pulling action of the pull spring 19. The die plate 5 is moved upward to strike the wedge block 20 again, so that the mold plate 5 vibrates again, thereby assisting the fallen oxide layer to pass through the dust collecting hole 12. At the same time, the transmission gear 9 drives the driven gear 17 to rotate, and the driven gear 17 drives the transmission screw 16 to rotate through the belt. During the rotation process, the transmission screw 16 drives the piston plate 15 installed with threads passing through its outside to move, so that negative pressure is formed inside the negative pressure chamber 14, thereby sucking the oxide layer from the forming cavity 2 into the inside of the forging machine body 1. Finally, the die plate 5 moves to the bottom. At this time, the dust collecting hole 12 and the sealing block 13 cooperate with each other to seal, so that the sealing inside the forming cavity 2 is guaranteed during the next forging. The push rod 6 slides through the top of the forging machine body 1, and the push rod 6 and the top of the forging machine body 1 have a certain sliding resistance, so that the vibration block 18 first moves upward to strike the wedge block 20 under the action of the pull spring 19, and the push rod 6 drives the die plate 5 to move downward and reset under the action of the reset spring 7.

[0044] Example 3: Please refer to Figure 8-Figure 10 In order to solve the problem that the molding cavity 2 is overheated for a long time during the use of the conventional device, the present embodiment provides the following technical solution, which uses a cooling structure to cool the molding cavity 2. Specifically, the molding cavity 2 is provided with a cooling mechanism for cooling the molding cavity 2. The cooling mechanism includes a tubular cooling groove 22 provided inside the molding cavity 2. The upper surface of the molding cavity 2 is fixedly provided with an atomizing nozzle 29 connected to the cooling groove 22. The cooling groove 22 is connected to the refrigeration chamber provided inside the forging machine body 1 through a conveying pipe 23. 24 are interconnected, and a refrigerator 25 is fixedly installed inside the refrigeration bin 24, a connecting pipe 26 is fixedly installed at the lower end of the refrigeration bin 24, and the connecting pipe 26 draws water inside the water storage bin 27 into the refrigeration bin 24, and a stirring rod 28 coaxially fixed with the transmission screw 16 is installed inside the refrigeration bin 24, a heat dissipation net 30 corresponding to the driving mechanism is fixedly installed inside the forging machine body 1, and the heat dissipation net 30 and the conveying pipe 23 are fitted with each other, and a heat dissipation fan 31 corresponding to the heat dissipation net 30 is fixedly installed inside the forging machine body 1.

[0045] After forging is completed, the water pump pumps the cooling water in the refrigeration bin 24 into the delivery pipe 23 (the refrigerator 25 in the refrigeration bin 24 cools the water, and at the same time, the transmission screw 16 drives the stirring rod 28 to rotate to achieve a better refrigeration effect, and the refrigeration bin 24 replenishes water from the water storage bin 27 through the connecting pipe 26), and then the cooling water is transported to the cooling tank 22 through the delivery pipe 23 to cool the forming cavity 2. After that, the water in the cooling tank 22 is sprayed out from the atomizing nozzle 29 to initially cool the product that has just been forged to avoid deformation of the product due to excessive temperature during the subsequent clamping process. At the same time, the delivery pipe 23 is attached to the heat dissipation net 30 to cool the air passing through the heat dissipation net 30 (the heat dissipation fan 31 is turned on during the operation of the device to drive the air flow, thereby inhaling air from the heat dissipation net 30 to cool the drive mechanism), so a better cooling effect can be achieved.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forging press mechanical ejection device, comprising a forging press body (1) for forging a workpiece, wherein a forming cavity (2) is fixedly mounted on the upper surface of the lower end of the forging press body (1), and an upper die (3) movable up and down is arranged above the forming cavity (2), and a hydraulic cylinder (4) is fixedly mounted above the upper die (3), characterized in that: Also includes: A mold plate (5) arranged transversely is installed inside the molding cavity (2), and an up-and-down sliding structure is formed between the mold plate (5) and the molding cavity (2), and a push rod (6) for driving the mold plate (5) to move is fixedly installed on the lower surface of the mold plate (5), and a return spring (7) is installed on the outside of the lower end of the push rod (6); A cam roller (8) for pressing the push rod (6) to move upward is rotatably mounted inside the forging machine body (1), and a driving mechanism for driving the cam roller (8) to rotate is mounted inside the forging machine body (1); A negative pressure mechanism for sucking metal oxides dropped from the molding cavity (2) is arranged inside the forging machine body (1), the negative pressure mechanism comprising a negative pressure bin (14) disposed inside the forging machine body (1) and a filter screen (1401) fixedly mounted on the upper surface of the negative pressure bin (14), and a vibration mechanism for driving the mold plate (5) to vibrate is installed inside the push rod (6); A cooling mechanism for cooling the molding cavity (2) is provided inside the molding body, the cooling mechanism comprising a tubular cooling groove (22) provided inside the molding body of the molding cavity (2), and an atomizing nozzle (29) in communication with the cooling groove (22) is fixedly mounted on the upper surface of the molding body of the molding cavity (2); The driving mechanism comprises a transmission gear (9) coaxially fixedly mounted on the side of the cam roller (8), and the side of the transmission gear (9) is meshedly connected with a driving gear (10), and the driving gear (10) is driven by a driving motor (11) fixedly mounted inside the forging machine body (1); A piston plate (15) is slidably mounted inside the negative pressure chamber (14), and a transmission screw (16) is threadedly mounted inside the piston plate (15), and the transmission screw (16) rotates synchronously with a driven gear (17) via a belt, and the driven gear (17) is meshingly connected with the transmission gear (9); The vibration mechanism comprises a vibration block (18) movably mounted inside the push rod (6), a pulling spring (19) for driving the vibration block (18) to move upwards is fixedly mounted on the upper surface of the vibration block (18), and the vibration block (18) is made of a magnetic material; Wedge-shaped blocks (20) with an inclined structure are fixedly installed at the upper and lower ends inside the push rod (6), and the vibration block (18) and the adsorption magnetic strip (21) fixedly installed inside the cam roller (8) are magnetically adsorbed to each other.

2. A mechanical ejector device for a forging press according to claim 1, characterized in that: A dust collection hole (12) penetrating from top to bottom is provided inside the mold plate (5), and a sealing block (13) is fixedly mounted on the lower surface of the molding cavity (2).

3. A mechanical ejector device for a forging press according to claim 2, characterized in that: The sealing block (13) and the dust collecting hole (12) correspond to each other in vertical position, and the height of the sealing block (13) is the same as that of the dust collecting hole (12).

4. A mechanical ejector device for a forging press according to claim 1, characterized in that: The cooling groove (22) is communicated with a refrigeration bin (24) disposed inside the forging machine body (1) via a delivery pipe (23), and a refrigerator (25) is fixedly installed inside the refrigeration bin (24).

5. A mechanical ejector device for a forging press according to claim 4, characterized in that: A connecting pipe (26) is fixedly installed through the lower end of the refrigeration bin (24), and the connecting pipe (26) draws water from the water storage bin (27) into the refrigeration bin (24). A stirring rod (28) is installed inside the refrigeration bin (24) and is coaxially fixed with the transmission screw (16).

6. A mechanical ejector device for a forging press according to claim 4, characterized in that: A heat dissipation net (30) corresponding to the drive mechanism is fixedly installed inside the forging machine body (1), and the heat dissipation net (30) and the conveying pipe (23) are in contact with each other. A heat dissipation fan (31) corresponding to the heat dissipation net (30) is fixedly installed inside the forging machine body (1).

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