A hot press forming device for bolt processing

Abstract

This invention belongs to the field of metal forging technology, specifically a hot pressing forming device for bolt processing. It includes a base, with a lower die and a fixed rod fixedly connected to the upper surface of the base. A movable stage is slidably connected to the surface of the fixed rod, and an upper die is fixedly connected to the lower surface of the movable stage. A cooling assembly is provided on one side of the base, and an ejection assembly is provided inside the base. The ejection assembly includes a movable plate slidably connected inside the base, a movable rod fixedly connected to the upper surface of the movable plate, and a top plate slidably and rotatably connected inside the movable rod. By adjusting the positions of the movable rod and the top plate inside the lower die, precise adaptation and stable support for bolts of different lengths are achieved. Hot forging can be completed without changing the die, significantly improving production efficiency, forming accuracy, and equipment versatility.

Description

Technical Field

[0001] This invention belongs to the field of metal forging technology, specifically a hot pressing forming device for bolt processing. Background Technology

[0002] A bolt is a threaded fastener, typically consisting of a head and a thread, used in conjunction with a nut to connect two or more parts. By using a thermoforming device to process bolts, problems such as cracking, mold wear, and equipment overload that cannot be overcome by cold working can be solved, while meeting the stringent requirements of high-end fields such as aerospace and energy equipment for high-performance bolts.

[0003] A patent with publication number CN118926465B discloses a hot pressing forming device for bolt processing, including a processing table, a forming component in the inner cavity of the processing table, a hydraulic cylinder fixedly installed on the top and bottom walls of the processing table, and a second piston rod slidably connected to the inner cavity of the hydraulic cylinder.

[0004] The aforementioned existing hot pressing forming device for bolt processing can be adapted to perform hot pressing forming operations on bolts of different lengths.

[0005] During the operation of the existing hot pressing forming device for bolt processing, the oxide scale on the surface of the bolt is subjected to shearing and extrusion during the hot forging operation, forming impurities that adhere to the inner wall of the lower die. The coolant entering the lower die will wash away the impurities, causing them to adhere to the upper surface of the moving rod. This results in the accumulation of oxide scale residue, changes in the internal gap of the lower die, and indentations on the lower surface of the bolt during hot forging.

[0006] Therefore, the present invention provides a hot pressing forming apparatus for bolt processing. Summary of the Invention

[0007] To overcome the shortcomings of the existing technology and solve the problems mentioned in the background technology, such as the accumulation of oxide scale residue, which leads to changes in the internal gap of the lower die and the appearance of indentations on the lower surface of the bolt during hot forging.

[0008] The technical solution adopted by the present invention to solve its technical problem is as follows: The hot pressing forming device for bolt processing of the present invention includes a base, a lower mold and a fixed rod are fixedly connected to the upper surface of the base, a movable stage is slidably connected to the surface of the fixed rod, an upper mold is fixedly connected to the lower surface of the movable stage, a cooling component is provided on one side of the base, and an ejection component is provided inside the base. The ejection component includes a movable plate slidably connected inside the base, a movable rod is fixedly connected to the upper surface of the movable plate, and a top plate is slidably and rotatably connected inside the movable rod.

[0009] Preferably, a fixed platform is fixedly connected to the upper surface of the fixed rod, and a hydraulic cylinder is fixedly connected to the upper surface of the fixed platform. The telescopic end of the hydraulic cylinder is fixedly connected to the upper surface of the upper mold.

[0010] Preferably, the cooling assembly includes a water tank fixedly connected to one side of the base, a pump fixedly connected to the upper surface of the water tank, a spray pipe fixedly connected to the output end of the pump, and a flexible hose fixedly connected between the water tank and the moving rod.

[0011] Preferably, a first positioning rod is slidably connected inside the movable plate, the first positioning rod is fixedly connected to the inside of the base, a first lead screw is threadedly connected inside the movable plate, the first lead screw is rotatably connected to the inside of the base, a first motor is fixedly connected inside the base, a drive gear is fixedly connected to the output end of the first motor, a driven gear is fixedly connected to one end of the first lead screw, and the drive gear and the driven gear mesh with each other.

[0012] Preferably, a limiting plate is slidably connected to the upper surface of the movable plate, the limiting plate is provided with an ascending section, a first cleaning section is provided on one side of the ascending section, a descending section is provided on one side of the first cleaning section, a second cleaning section is provided on one side of the descending section, and a reset section is provided on one side of the second cleaning section. The reset section communicates with one side of the ascending section.

[0013] Preferably, the first cleaning section has a first protrusion fixedly connected inside, the second cleaning section has a second protrusion fixedly connected inside, the height of the first protrusion is greater than the height of the second protrusion, the groove depth of the descending section is greater than the groove depth of the first cleaning section, and the groove depth of the ascending section is greater than the groove depth of the reset section.

[0014] Preferably, a second lead screw is threaded to the back of the limiting plate, the second lead screw is rotatably connected to both sides of the moving plate, a second motor is fixedly connected to one side of the moving plate, the output end of the second motor is fixedly connected to one end of the second lead screw, and a second positioning rod is slidably connected inside the limiting plate, the second positioning rod is fixedly connected to both sides of the moving plate.

[0015] Preferably, a connecting block is rotatably connected to one end of the top plate, a rotating gear is fixedly connected to one end of the top plate, a rack is slidably connected inside the connecting block, the rack and the rotating gear mesh with each other, and a second spring is fixedly connected to one side of the rack and the inner wall of the connecting block.

[0016] Preferably, a limiting rod is slidably connected inside the connecting block, a first spring is fixedly connected between the limiting rod and the connecting block, a third spring is fixedly connected between the top plate and the moving rod, and one end of the limiting rod is slidably connected to the interior of the rising section, the falling section, the first cleaning section, the second cleaning section and the reset section.

[0017] Preferably, the movable rod has a longitudinal groove inside, a transverse groove on one side of the longitudinal groove, a sealing ring fixedly connected to the outer wall of the movable rod, and a brush inside the movable rod.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The hot pressing forming device for bolt processing described in this invention allows for the hot forging of bolts of different sizes. When a moving plate and moving rod are required, the moving rod drives the top plate to rise synchronously and slide to a suitable height inside the lower mold. The upper surfaces of the connecting plate and the top plate form a supporting plane. The bolt is then placed inside the lower mold and supported and limited by the connecting plate and the top plate. The upper mold then descends and engages with the lower mold to perform the hot forging operation. This device achieves precise adaptation and stable support for bolts of different lengths by adjusting the positions of the moving rod and the top plate inside the lower mold. Hot forging can be completed without changing the mold, significantly improving production efficiency, forming accuracy, and equipment versatility. It also avoids the problems of unstable support, cumbersome operation, safety hazards, and high costs associated with traditional fixed molds or pads.

[0020] 2. The hot pressing forming device for bolt processing described in this invention allows for the demolding of bolts after forming. When demolding is required, a top plate can be driven to slide upwards inside a moving rod. The top plate pushes the bolt upwards inside the lower mold, thus demolding the bolt. Simultaneously, coolant enters the lower mold. Rotating the top plate opens the groove above the moving plate, allowing coolant to flow into the moving rod and into a water tank via a hose. Simultaneously, the rotation of the top plate pushes impurities washed away by the coolant from the upper surface of the moving rod into its interior. The rotation of the top plate actively pushes oxide scale residue adhering to the upper surface of the moving rod into its inner cavity, where it is discharged with the coolant, preventing oxide scale residue buildup that could cause changes in the internal gap of the lower mold and indentations on the lower surface of the bolt during hot forging. This reduces the adaptability to bolts of different lengths and the surface quality of the bolts.

[0021] 3. In the hot pressing forming device for bolt processing described in this invention, when the top plate is reset, the top plate descends into the interior of the moving rod, and the brush on the upper surface of the top plate contacts the brush on the lower inner surface of the moving rod. Then the top plate rotates again, and the impurities on the upper surface of the top plate can be cleaned again by the brush on the lower surface of the moving rod. This avoids the problem of impurities adhering to the upper surface of the top plate, which would cause a decrease in the accuracy of bolt size adjustment and a decrease in the quality of bolt hot forging. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

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

[0024] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0025] Figure 3 This is a cross-sectional view of the overall structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the overall structure of the ejector component of the present invention;

[0027] Figure 5 This is a structural schematic diagram of the ejector component of the present invention from another perspective;

[0028] Figure 6 This is a cross-sectional view of the moving rod of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the limiting plate and the top plate of the present invention;

[0030] Figure 8 This is a schematic diagram of the top plate of the present invention;

[0031] Figure 9 This is a cross-sectional view of the connecting block of the present invention;

[0032] Figure 10 This is a schematic diagram of the structure of the limiting plate of the present invention;

[0033] In the diagram: 1. Base; 11. Lower mold; 12. Fixed rod; 13. Moving table; 131. Upper mold; 14. Fixed table; 141. Hydraulic cylinder; 2. Water tank; 21. Pump; 22. Nozzle; 3. Ejection assembly; 31. First lead screw; 311. Driven gear; 32. First positioning rod; 33. Moving plate; 34. Moving rod; 341. Hose; 342. Sealing ring; 343. Longitudinal groove; 344. Transverse groove; 35. Top plate; 351. Connecting block; 35 2. Limiting rod; 353. First spring; 354. Rack; 355. Second spring; 356. Rotating gear; 357. Third spring; 36. Limiting plate; 361. Rising section; 362. First cleaning section; 363. First protrusion; 364. Falling section; 365. Second cleaning section; 366. Second protrusion; 367. Reset section; 37. First motor; 371. Drive gear; 38. Second motor; 381. Second lead screw; 382. Second positioning rod. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] Example 1: As Figures 1 to 10 As shown in the embodiment of the present invention, a hot pressing forming device for bolt processing includes a base 1. A lower mold 11 and a fixed rod 12 are fixedly connected to the upper surface of the base 1. A movable stage 13 is slidably connected to the surface of the fixed rod 12. An upper mold 131 is fixedly connected to the lower surface of the movable stage 13. A cooling component is provided on one side of the base 1. An ejection component 3 is provided inside the base 1. The ejection component 3 includes a movable plate 33 slidably connected inside the base 1. A movable rod 34 is fixedly connected to the upper surface of the movable plate 33. A top plate 35 is slidably and rotatably connected inside the movable rod 34.

[0036] like Figure 2 As shown, the cooling assembly includes a water tank 2 fixedly connected to one side of the base 1, a pump 21 fixedly connected to the upper surface of the water tank 2, a spray pipe 22 fixedly connected to the output end of the pump 21, and a hose 341 fixedly connected between the water tank 2 and the moving rod 34.

[0037] Specifically, in the existing hot pressing forming device for bolt processing, the position of the internal moving rod 34 can be adjusted to adapt to bolts of different sizes for hot forging. After the bolt is hot forged, coolant is needed to cool the formed bolt. During the hot forging operation, the oxide scale on the surface of the bolt is subjected to shearing and extrusion to form impurities that adhere to the inner wall of the lower die 11. The coolant entering the lower die 11 will wash away the impurities, causing them to adhere to the upper surface of the moving rod 34. This results in the accumulation of oxide scale residue, causing changes in the internal gap of the lower die 11, and indentations appearing on the lower surface of the bolt during hot forging.

[0038] To avoid the above problems, this device is used as follows: When it is necessary to hot forge bolts of different sizes, the movable plate 33 can be driven to slide inside the base 1. The movable plate 33 drives the movable rod 34 to slide synchronously inside the base 1. The movable rod 34 drives the top plate 35 to slide synchronously to the appropriate position inside the lower mold 11. Then the bolt is inserted into the lower mold 11. The supporting plane formed by the movable rod 34 and the top plate 35 supports one end of the lower mold 11. Then the movable table 13 is driven to lower the upper mold 131. The upper mold 131 hot presses the bolt inside the lower mold 11. At the same time, the pump 21 works and pumps coolant from the water tank 2. The coolant is sprayed out through the spray pipe 22 to the lower mold 11. The coolant can cool the hot-pressed bolt.

[0039] After molding is completed, the top plate 35 is driven to rise and slide inside the moving rod 34. The top plate 35 pushes the bolt to rise, and then the user can use tools to remove the bolt from the inside of the lower mold 11. At this time, the lower surface of the top plate 35 and the upper surface of the moving rod 34 are in contact.

[0040] After the bolts are removed, the coolant enters the interior of the lower mold 11 and flushes the impurities on the inner wall of the lower mold 11. At this time, the top plate 35 is driven to rotate. The rotation of the top plate 35 causes the groove on the upper surface of the moving rod 34 to open. The coolant can carry the flushed impurities into the interior of the moving rod 34 and finally enter the interior of the water tank 2 through the hose 341. During the rotation of the top plate 35, the impurities attached to the upper surface of the moving rod 34 can be pushed and cleaned, so that the impurities on the upper surface of the moving rod 34 enter the interior of the moving rod 34 through the groove.

[0041] This device achieves precise adaptation and stable support for bolts of different lengths by adjusting the position of the moving rod 34 and the top plate 35 inside the lower mold 11. Hot forging can be completed without changing the mold, which significantly improves production efficiency, forming accuracy and equipment versatility. At the same time, it avoids the problems of unstable support, cumbersome operation, safety hazards and high cost caused by traditional fixed mold or pad block methods.

[0042] Meanwhile, the rotation of the top plate 35 can actively push the oxide scale residue adhering to the upper surface of the moving rod 34 into the inner cavity of the moving rod 34, and drain it away with the coolant. This avoids the accumulation of oxide scale residue, which would cause changes in the internal gap of the lower die 11 and the problem of indentation on the lower surface of the bolt during hot forging. This reduces the compatibility with bolts of different lengths and the surface quality of the bolts. In addition, the moving rod 34 can be opened to facilitate the flow of impurities and coolant into the water tank 2 for recycling.

[0043] like Figure 2 As shown, a fixed platform 14 is fixedly connected to the upper surface of the fixed rod 12, and a hydraulic cylinder 141 is fixedly connected to the upper surface of the fixed platform 14. The telescopic end of the hydraulic cylinder 141 is fixedly connected to the upper surface of the upper mold 131.

[0044] Specifically, when it is necessary to drive the moving platform 13 to descend, the hydraulic cylinder 141 can be opened. The hydraulic cylinder 141 drives the moving platform 13 to slide on the surface of the fixed rod 12, and the moving platform 13 can drive the upper mold 131 to descend.

[0045] like Figure 3 and Figure 4 As shown, a first positioning rod 32 is slidably connected inside the movable plate 33. The first positioning rod 32 is fixedly connected to the inside of the base 1. A first lead screw 31 is threadedly connected inside the movable plate 33. The first lead screw 31 is rotatably connected to the inside of the base 1. A first motor 37 is fixedly connected inside the base 1. A drive gear 371 is fixedly connected to the output end of the first motor 37. A driven gear 311 is fixedly connected to one end of the first lead screw 31. The drive gear 371 and the driven gear 311 mesh with each other.

[0046] Specifically, when it is necessary to drive the moving plate 33 to move upward, the first motor 37 can be turned on. The first motor 37 drives the drive gear 371 to rotate. The drive gear 371 and the driven gear 311 mesh, so that the driven gear 311 drives the first lead screw 31 to rotate. The first lead screw 31 drives the moving plate 33 to slide on the first positioning rod 32, so that the moving plate 33 can move the moving rod 34 and the top plate 35 to rise synchronously.

[0047] like Figure 4 and Figure 10 As shown, a limiting plate 36 is slidably connected to the upper surface of the movable plate 33. The limiting plate 36 has an upward section 361 inside. A first cleaning section 362 is provided on one side of the upward section 361. A first protrusion 363 is fixedly connected inside the first cleaning section 362.

[0048] like Figure 6 and Figure 7 As shown, a second lead screw 381 is threadedly connected to the back of the limiting plate 36. The second lead screw 381 is rotatably connected to both sides of the moving plate 33. A second motor 38 is fixedly connected to one side of the moving plate 33. The output end of the second motor 38 is fixedly connected to one end of the second lead screw 381. A second positioning rod 382 is slidably connected inside the limiting plate 36. The second positioning rod 382 is fixedly connected to both sides of the moving plate 33.

[0049] like Figure 8 and Figure 9 As shown, a connecting block 351 is rotatably connected to one end of the top plate 35, and a rotating gear 356 is fixedly connected to one end of the top plate 35. A rack 354 is slidably connected inside the connecting block 351, and the rack 354 and the rotating gear 356 mesh with each other. A second spring 355 is fixedly connected to one side of the rack 354 and the inner wall of the connecting block 351. A limit rod 352 is slidably connected inside the connecting block 351. A first spring 353 is fixedly connected between the limit rod 352 and the connecting block 351. A third spring 357 is fixedly connected between the top plate 35 and the moving rod 34. One end of the limit rod 352 is slidably connected to the interior of the rising section 361, the falling section 364, the first cleaning section 362, the second cleaning section 365, and the reset section 367.

[0050] Specifically, when it is necessary to drive the bolt for demolding, the second motor 38 can be turned on. The second motor 38 drives the second lead screw 381 to rotate. The second lead screw 381 drives the limiting plate 36 to slide on the second positioning rod 382. In the initial position, one end of the limiting rod 352 is in the rising section 361. When the limiting plate 36 slides, one end of the limiting rod 352 slides in the rising section 361. When the limiting rod 352 slides to the interface between the rising section 361 and the first cleaning section 362, the limiting rod 352 drives the connecting block 351 to rise. The connecting block 351 drives the top plate 35 to press the third spring 357 to rise synchronously. The rise of the top plate 35 can push the bolt for demolding.

[0051] After the bolt demolding operation is completed, the limiting plate 36 can be driven to continue sliding, so that the limiting rod 352 slides into the first cleaning section 362. At this time, the lower surface of the top plate 35 contacts the upper surface of the moving rod 34, and one end of the limiting rod 352 presses against one side of the first spring 353 and the rack 354. As the limiting rod 352 continues to slide in the first cleaning section 362 and contacts the first protrusion 363, the first protrusion 363 presses against the limiting rod 352, so that the limiting rod 352 presses against the first spring 353 again and pushes the rack 354 to slide. The rack 354 stretches the second spring 355 and meshes with the rotating gear 356. The rotating gear 356 drives the top plate 35 to rotate. The rotation of the top plate 35 can clean the impurities on the upper surface of the moving rod 34 and open the upper surface of the moving rod 34, so that the coolant and impurities can enter the interior of the moving rod 34. Repeating the above operation can clean the impurities on the upper surface of the moving rod 34.

[0052] Example 2: Figures 8 to 10 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a descending segment 364 is provided on one side of the first cleaning segment 362, a second cleaning segment 365 is provided on one side of the descending segment 364, a reset segment 367 is provided on one side of the second cleaning segment 365, and the reset segment 367 communicates with one side of the rising segment 361.

[0053] like Figure 10 As shown, the second cleaning section 365 is internally fixedly connected to a second protrusion 366. The height of the first protrusion 363 is greater than the height of the second protrusion 366. The groove depth of the descending section 364 is greater than the groove depth of the first cleaning section 362. The groove depth of the ascending section 361 is greater than the groove depth of the reset section 367.

[0054] like Figure 5 As shown, the movable rod 34 has a longitudinal groove 343 inside, a transverse groove 344 on one side of the longitudinal groove 343, a sealing ring 342 fixedly connected to the outer wall of the movable rod 34, and a brush inside the movable rod 34.

[0055] Specifically, after the top plate 35 cleans the impurities on the upper surface of the moving rod 34, some impurities will adhere to the upper surface of the top plate 35 due to the flushing of the coolant. Therefore, when the top plate 35 and the upper surface of the moving plate 33 are in contact, the impurities will still cause a decrease in the accuracy of bolt size adjustment and a decrease in the quality of bolt hot forging.

[0056] To avoid the aforementioned problems, this device operates as follows: when the limiting rod 352 slides from the first cleaning section 362 into the descending section 364 and slides within the descending section 364, the third spring 357 drives the connecting block 351 to reset. The connecting block 351 then drives the top plate 35 to descend. The descent of the top plate 35 can push and clean the impurities stuck in the groove of the moving rod 34. When the limiting rod 352 slides to the interface between the second cleaning section 365 and the descending section 364, the top plate 35 slides inside the longitudinal groove 343, and the top plate 35 is in a longitudinal position. At the interface between the groove 343 and the transverse groove 344, the upper surface of the top plate 35 contacts the inner upper surface of the moving plate 33. A brush is provided inside the moving rod 34. Then, the limiting rod 352 slides in the second cleaning section 365 and contacts the second protrusion 366, so that the limiting rod 352 pushes the rack 354 to slide again. The rack 354 meshes with the rotating gear 356, so that the top plate 35 slides in the transverse section and rotates in contact with the brush inside the moving rod 34. The impurities on the upper surface of the top plate 35 can be cleaned by the brush.

[0057] When the limiting rod 352 slides in the reset section 367, the top plate 35 rises inside the longitudinal groove 343. When the limiting rod 352 slides to the rising section 361, the top plate 35 resets to its initial state and remains horizontal with the surface of the moving rod 34.

[0058] Working principle: When hot forging of bolts of different sizes is required, the first motor 37 is turned on, and the first motor 37 drives the drive gear 371 to rotate. The drive gear 371 and the driven gear 311 mesh, so that the driven gear 311 drives the first lead screw 31 to rotate. The first lead screw 31 drives the moving plate 33 to slide on the first positioning rod 32. The moving plate 33 drives the moving rod 34 to slide synchronously inside the base 1. The moving rod 34 drives the top plate 35 to slide synchronously to the appropriate position inside the lower mold 11. Then the bolt is inserted into the lower mold 11. The supporting plane formed by the moving rod 34 and the top plate 35 supports one end of the lower mold 11.

[0059] When the hydraulic cylinder 141 is opened, the hydraulic cylinder 141 drives the moving table 13 to slide on the surface of the fixed rod 12. The moving table 13 can then drive the upper mold 131 to descend. The upper mold 131 hot-presses the bolts inside the lower mold 11. At the same time, the pump 21 works and draws coolant from the water tank 2. The coolant is sprayed through the nozzle 22 to the lower mold 11, and the coolant can cool the hot-pressed bolts.

[0060] After molding is completed, the second motor 38 can be turned on. The second motor 38 drives the second lead screw 381 to rotate. The second lead screw 381 drives the limiting plate 36 to slide on the second positioning rod 382. In the initial position, one end of the limiting rod 352 is in the rising section 361. When the limiting plate 36 slides, one end of the limiting rod 352 slides in the rising section 361. When the limiting rod 352 slides to the interface between the rising section 361 and the first cleaning section 362, the limiting rod 352 drives the connecting block 351 to rise. The connecting block 351 drives the top plate 35 to press the third spring 357 to rise synchronously. The rise of the top plate 35 can push the bolt to perform the demolding operation.

[0061] After the bolt demolding operation is completed, the limiting plate 36 can be driven to continue sliding, so that the limiting rod 352 slides into the first cleaning section 362. At this time, the lower surface of the top plate 35 and the upper surface of the moving rod 34 are in contact, and one end of the limiting rod 352 presses against the first spring 353 and one side of the rack 354. As the limiting rod 352 continues to slide in the first cleaning section 362 and contacts the first protrusion 363, the first protrusion 363 presses against the limiting rod 352, so that the limiting rod 352 presses against the first spring 353 again and pushes the rack 354 to slide. The rack 354 stretches the second spring 355 and meshes with the rotating gear 356. The rotating gear 356 drives the top plate 35 to rotate. The rotation of the top plate 35 can clean the impurities on the upper surface of the moving rod 34 and open the upper surface of the moving rod 34, so that the coolant and impurities can enter the interior of the moving rod 34. Repeat the above operation to clean the impurities on the upper surface of the moving rod 34.

[0062] When the limiting rod 352 slides from the first cleaning section 362 into the descending section 364 and slides within the descending section 364, the third spring 357 drives the connecting block 351 to reset. The connecting block 351 then drives the top plate 35 to descend. The descent of the top plate 35 can push and clean the impurities stuck in the groove of the moving rod 34. When the limiting rod 352 slides to the interface between the second cleaning section 365 and the descending section 364, the top plate 35 slides inside the longitudinal groove 343, and the top plate 35 is located between the longitudinal groove 343 and the transverse groove. At the interface of 344, the upper surface of the top plate 35 and the inner upper surface of the moving plate 33 are in contact. A brush is provided inside the moving rod 34. Then the limiting rod 352 slides in the second cleaning section 365 and contacts the second protrusion 366, so that the limiting rod 352 pushes the rack 354 to slide again. The rack 354 meshes with the rotating gear 356, so that the top plate 35 slides in the transverse section and rotates in contact with the brush inside the moving rod 34. The impurities on the upper surface of the top plate 35 can be cleaned by the brush.

[0063] When the limiting rod 352 slides in the reset section 367, the top plate 35 rises inside the longitudinal groove 343. When the limiting rod 352 slides to the rising section 361, the top plate 35 resets to its initial state and remains horizontal with the surface of the moving rod 34, so that the bolt can be placed for another hot pressing operation.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot pressing forming apparatus for bolt processing, characterized in that: The base (1) includes a base (1), on the upper surface of which a lower mold (11) and a fixed rod (12) are fixedly connected. A movable stage (13) is slidably connected to the surface of the fixed rod (12), and an upper mold (131) is fixedly connected to the lower surface of the movable stage (13). A cooling assembly is provided on one side of the base (1), and an ejection assembly (3) is provided inside the base (1). The ejection assembly (3) includes a movable plate (33) slidably connected inside the base (1). A movable rod (34) is fixedly connected to the upper surface of the movable plate (33), and a top plate (35) is slidably and rotatably connected inside the movable rod (34). A limiting plate (36) is slidably connected to the upper surface of the movable plate (33). The limiting plate (36) is provided with an ascending section (361) inside. A first cleaning section (362) is provided on one side of the ascending section (361). A descending section (364) is provided on one side of the first cleaning section (362). A second cleaning section (365) is provided on one side of the descending section (364). A reset section (367) is provided on one side of the second cleaning section (365). The reset section (367) communicates with one side of the ascending section (361). The first cleaning section (362) has a first protrusion (363) fixedly connected inside, and the second cleaning section (365) has a second protrusion (366) fixedly connected inside. The height of the first protrusion (363) is greater than the height of the second protrusion (366). The groove depth of the descending section (364) is greater than the groove depth of the first cleaning section (362). The groove depth of the ascending section (361) is greater than the groove depth of the reset section (367). One end of the top plate (35) is rotatably connected to a connecting block (351), and a limit rod (352) is slidably connected inside the connecting block (351). A first spring (353) is fixedly connected between the limit rod (352) and the connecting block (351), and a third spring (357) is fixedly connected between the top plate (35) and the moving rod (34). One end of the limit rod (352) is slidably connected to the interior of the rising section (361), the falling section (364), the first cleaning section (362), the second cleaning section (365), and the reset section (367).

2. The hot pressing forming device for bolt processing according to claim 1, characterized in that: A fixed platform (14) is fixedly connected to the upper surface of the fixed rod (12), and a hydraulic cylinder (141) is fixedly connected to the upper surface of the fixed platform (14). The telescopic end of the hydraulic cylinder (141) is fixedly connected to the upper surface of the upper mold (131).

3. The hot pressing forming device for bolt processing according to claim 2, characterized in that: The cooling assembly includes a water tank (2) fixedly connected to one side of the base (1), a pump (21) fixedly connected to the upper surface of the water tank (2), a nozzle (22) fixedly connected to the output end of the pump (21), and a hose (341) fixedly connected between the water tank (2) and the moving rod (34).

4. The hot pressing forming apparatus for bolt processing according to claim 3, characterized in that: The movable plate (33) is internally slidably connected to a first positioning rod (32), which is internally fixedly connected to the base (1). The movable plate (33) is internally threadedly connected to a first lead screw (31), which is internally rotatably connected to the base (1). The base (1) is internally fixedly connected to a first motor (37), which is fixedly connected to a drive gear (371) at its output end. One end of the first lead screw (31) is fixedly connected to a driven gear (311), which meshes with the drive gear (371) and the driven gear (311).

5. The hot pressing forming apparatus for bolt processing according to claim 1, characterized in that: The back of the limiting plate (36) is threaded with a second lead screw (381), the second lead screw (381) is rotatably connected to both sides of the moving plate (33), a second motor (38) is fixedly connected to one side of the moving plate (33), the output end of the second motor (38) is fixedly connected to one end of the second lead screw (381), and a second positioning rod (382) is slidably connected inside the limiting plate (36), the second positioning rod (382) is fixedly connected to both sides of the moving plate (33).

6. The hot pressing forming apparatus for bolt processing according to claim 1, characterized in that: A rotating gear (356) is fixedly connected to one end of the top plate (35), and a rack (354) is slidably connected inside the connecting block (351). The rack (354) and the rotating gear (356) mesh with each other, and a second spring (355) is fixedly connected to one side of the rack (354) and the inner wall of the connecting block (351).

7. The hot pressing forming apparatus for bolt processing according to claim 1, characterized in that: The moving rod (34) has a longitudinal groove (343) inside, and a transverse groove (344) is provided on one side of the longitudinal groove (343). A sealing ring (342) is fixedly connected to the outer wall of the moving rod (34), and a brush is provided inside the moving rod (34).

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