Spline housing cold heading forming equipment

Abstract

The invention relates to spline housing cold heading forming equipment, and relates to the technical field of spline housing machining equipment, the spline housing cold heading forming equipment comprises a workbench, a fixed die holder mounted on the workbench and a movable die holder matched with the fixed die holder, and further comprises a demolding mechanism mounted on the workbench and used for demolding a formed spline housing; the demolding mechanism comprises a driving box installed on the workbench, a lifting assembly installed in the driving box and used for driving the fixed mold base to vertically move, a first threaded rod driven by the lifting assembly to rotate, and an oil storage box installed in the driving box. The driving and conveying assembly is driven by the first threaded rod and sprays lubricating oil stored in the oil storage tank to the fixed mold base and the spline housing; and the overturning assembly is mounted in the driving box and is used for driving the fixed mold base to overturn when the fixed mold base vertically moves. The spline housing demolding device has the effect that indentation and deformation cannot be caused to the surface when the spline housing is demolded.

Description

A cold heading forming equipment for spline sleeves Technical Field

[0001] This invention relates to the field of spline sleeve processing equipment, and in particular to a cold heading forming equipment for spline sleeves. Background Technology

[0002] Spline sleeves are key components in mechanical transmission and are widely used in automobiles, construction machinery, machine tools and other fields. They transmit torque through the meshing of spline teeth and spline shafts, requiring high dimensional accuracy, tooth profile regularity and mechanical strength.

[0003] An existing cold heading forming equipment for spline sleeves includes a worktable, a fixed mold base, a moving mold base, a drive mechanism, and a lifting mechanism. During operation, the fixed mold base is first fixed on the worktable. Then, the blank to be processed is placed inside the fixed mold base. Next, the drive mechanism drives the moving mold base to close with the fixed mold base, thereby cold heading the blank to form a spline sleeve. Finally, the lifting mechanism is activated to eject the formed spline sleeve from the fixed mold base, achieving automatic demolding.

[0004] In the above structure, when the lifting mechanism pushes out the formed spline sleeve, it is easy to cause indentations on the pushed-out part of the spline sleeve, and at the same time, it will also cause the spline sleeve to deform, thus greatly reducing the quality of the product. Summary of the Invention

[0005] In order to prevent the spline sleeve from causing indentations and deformation on the surface during ejection, the present invention provides a cold heading forming device for spline sleeves.

[0006] This invention provides a cold heading forming equipment for spline sleeves, employing the following technical solution: A cold heading forming equipment for spline sleeves includes a worktable, a fixed mold base mounted on the worktable, and a movable mold base cooperating with the fixed mold base. It also includes a demolding mechanism mounted on the worktable for demolding the formed spline sleeve. The demolding mechanism includes a drive box mounted on the worktable, a lifting assembly mounted in the drive box for driving the fixed mold base to move vertically, a first threaded rod driven to rotate by the lifting assembly, an oil storage tank mounted in the drive box, a drive conveying assembly driven by the first threaded rod to spray lubricating oil stored in the oil storage tank onto the fixed mold base and the spline sleeve, and a flipping assembly mounted in the drive box for driving the fixed mold base to flip when it moves vertically.

[0007] By adopting the above technical solution, there is no need to eject the formed spline sleeve during demolding. Instead, the lifting component drives the fixed mold base to rise vertically and detach from the worktable. At the same time as the vertical rise, the conveying component drives the lubricating oil to be precisely sprayed onto the fixed mold base and the formed spline sleeve, reducing demolding friction. Then, the flipping component drives the fixed mold base to flip. Under the weight of the formed spline sleeve itself and the lubrication of the lubricating oil, the spline sleeve falls out of the fixed mold base, achieving automatic demolding. This avoids indentations and deformation on the surface of the spline sleeve, thereby greatly improving the quality of the product.

[0008] Optionally, the drive box has an oil storage chamber, the moving mold base has an oil delivery chamber, and the bottom of the oil delivery chamber has an oil delivery hole; the drive delivery assembly includes a drive plate threadedly connected to the first threaded rod, a limiting plate slidably mounted on the first threaded rod, a piston plate mounted on the limiting plate and slidably mounted in the oil storage tank, an oil outlet pipe connecting to the oil storage tank and delivering lubricating oil to the oil storage chamber, an oil delivery pipe connecting to the oil storage chamber and delivering lubricating oil in the oil storage chamber to the oil delivery chamber, and a first compression spring installed between the drive plate and the limiting plate; the first compression spring drives the limiting plate to always have an upward tendency.

[0009] By adopting the above technical solution, when the first threaded rod rotates, it drives the drive plate to move. Then, the first compression spring is compressed, pushing the limit plate and piston plate to move upward. When the piston plate moves upward, it squeezes the lubricating oil, causing the one-way valve structure to be in the open state. This allows the lubricating oil in the oil tank to flow to the oil storage chamber through the oil outlet pipe. Then, the lubricating oil is transported to the oil delivery chamber through the oil delivery pipe. Finally, the lubricating oil is sprayed onto the fixed mold base and the formed spline sleeve through the oil delivery hole for lubrication, thereby reducing frictional damage during demolding.

[0010] Optionally, the lifting assembly includes a bidirectional threaded rod rotatably mounted in the drive box, a drive block threadedly connected to the bidirectional threaded rod, a lifting plate threadedly connected to the first threaded rod, a drive rod hinged between the lifting plate and the drive block, and a first motor mounted on the drive box for driving the bidirectional threaded rod to rotate.

[0011] By adopting the above technical solution, the first motor drives the bidirectional threaded rod to rotate, which in turn drives the two drive blocks to move relative to each other. Then, it drives the drive rod to rotate. When the drive rod rotates, it drives the lifting plate to move vertically upward, thereby realizing the smooth lifting and lowering of the fixed mold base and the formed spline sleeve, and avoiding the uneven force on the spline sleeve caused by the shaking of the fixed mold base during the lifting process.

[0012] Optionally, the flipping assembly includes a connecting rod mounted on the lifting plate and detachably mounted to the fixed mold base, a gear mounted on the connecting rod, a telescopic column mounted on the limiting plate, a rack mounted on the telescopic column, and a second compression spring sleeved on the telescopic column and connected between the limiting plate and the rack; the second compression spring drives the rack to always have an upward tendency; when the limiting plate abuts against the oil tank and no longer moves, the gear continues to move upward and begins to mesh with the rack, thereby driving the fixed mold base to flip.

[0013] By adopting the above technical solution, the limiting plate stops moving after it abuts against the oil tank. At this time, the lifting plate continues to drive the fixed mold base to rise, thereby driving the gear to continue to move upward and mesh with the rack. The cooperation between the second compression spring and the telescopic column ensures that the rack and gear mesh accurately. After the gear meshes with the rack, it continues to rise and drive the gear to rotate. When the gear rotates, it drives the connecting rod to rotate. When the connecting rod rotates, it drives the fixed mold base to flip, so that the spline sleeve can be smoothly dislodged under the action of gravity and lubrication.

[0014] Optionally, a clamping box is installed on the fixed mold base, and an inner and outer clamping mechanism is provided inside the clamping box for simultaneously clamping the blank inside and outside; the inner and outer clamping mechanism includes an outer clamping assembly for clamping the outer side of the blank and an inner clamping assembly for clamping the inner side of the blank; the inner clamping assembly includes a rotating shaft mounted on the clamping box, a rotating disk mounted on the rotating shaft, a hinge shaft slidably mounted on the rotating disk, an inner sliding plate mounted on the hinge shaft and slidably connected to the fixed mold base, an inner clamping plate mounted on the inner sliding plate for clamping the inner side of the blank, and a second motor mounted on the clamping box for driving the rotating shaft to rotate.

[0015] By adopting the above technical solution, when the second motor drives the rotating shaft to rotate the rotating disk, the hinge shaft slides along the arc-shaped hole and pushes the inner sliding plate to expand outward, thereby driving the inner clamping plate to achieve centering clamping from the inside of the billet, thus avoiding deformation caused by force concentration on the inside of the billet. At the same time, the cooperation between the inner sliding plate and the inner sliding hole ensures that the clamping action is accurate and stable.

[0016] Optionally, the external clamping assembly includes a second threaded rod rotatably mounted on the clamping box, an external sliding plate threadedly connected to the second threaded rod and slidably mounted on the fixed mold base, and an external clamping half-ring mounted on the external sliding plate for clamping the outer side of the blank; the internal and external clamping mechanism further includes a helical gear structure for connecting the second threaded rod and the rotating shaft, wherein when the second motor drives the rotating shaft to rotate, the helical gear structure synchronously drives the second threaded rod to rotate.

[0017] By adopting the above technical solution, when the rotating shaft rotates, the second threaded rod is driven to rotate synchronously through the helical gear structure. When the second threaded rod rotates, it drives the outer sliding plate connected to it to move inward. When the outer sliding plate moves, it drives the outer clamping half ring to move inward, thereby clamping the outer side of the billet. This achieves synchronous application of clamping force on both the inner and outer sides of the billet, ensuring accurate positioning of the billet during cold heading without deviation or shaking.

[0018] Optionally, a fixing mechanism for fixing the outer side of the fixed mold base is installed on the worktable; the fixing mechanism includes a rotating shaft rotatably mounted on the worktable, a third threaded rod rotatably mounted on the worktable, a synchronization structure for driving the rotating shaft and the third threaded rod to rotate synchronously, a fixing slide plate threadedly connected to the third threaded rod, a fixing half ring mounted on the fixing slide plate for fixing the outer side of the fixed mold base, and a dual-axis motor mounted inside the worktable for driving the rotating shaft to rotate.

[0019] By adopting the above technical solution, when the dual-axis motor drives the rotating shaft to rotate, the third threaded rod is synchronously driven to rotate synchronously through the synchronous structure. When the third threaded rod rotates, it drives the fixed sliding plate connected to it to move in opposite directions, which in turn drives the fixed half ring to move in opposite directions, thereby achieving a stable clamping of the outer side of the fixed mold base, avoiding displacement or vibration of the fixed mold base due to impact force during the cold heading process, and ensuring mold closing accuracy.

[0020] Optionally, the drive box is equipped with a drive mechanism for driving the moving mold base and the fixed mold base to close; the drive mechanism includes a hydraulic cylinder mounted on the drive box for driving the moving mold base and the fixed mold base to close, and a limiting telescopic guide column mounted on the fixed mold base for limiting and guiding the movement of the fixed mold base; the moving mold base includes a mold base body and a mold core slidably mounted in the mold base body; a third compression spring is connected between the mold base body and the mold core, and the third compression spring drives the mold core to always have a downward tendency.

[0021] By adopting the above technical solution, the hydraulic cylinder drives the moving mold base and the fixed mold base to close the mold. During the mold closing, the limiting telescopic guide column is used to limit and guide the mold to avoid misalignment. At the same time, the mold core is inserted into the fixed mold base first under the action of the third compression spring. Then, the main body of the mold base compresses the third compression spring to apply cold heading force to the blank. The elastic buffer of the third compression spring can avoid the blank damage caused by excessive impact force in the early stage of cold heading, thus ensuring the forming quality.

[0022] Optionally, the worktable is provided with a positioning hole, and the fixed mold base is inserted into the positioning hole. A collection mechanism is provided directly below the positioning hole for collecting the formed spline sleeve and sprayed lubricating oil. The collection mechanism includes a collection box that is slidably installed on the worktable for collecting lubricating oil and spline sleeve, and an absorbent sponge that is detachably installed in the collection box. The absorbent sponge is used to absorb the lubricating oil and protect the spline sleeve. The collection box is provided with a handle groove for easy pulling of the collection box.

[0023] By adopting the above technical solution, the positioning hole provides initial positioning for the fixed mold base, and the collection box is set directly below the positioning hole to ensure that the spline sleeve and lubricating oil can be collected through the collection box when the spline sleeve is demolded. At the same time, when the spline sleeve falls into the collection box, the internal absorbent sponge can buffer the impact force of the spline sleeve during demolding to avoid collision damage, and can also absorb excess lubricating oil for recycling.

[0024] Optionally, a one-way valve structure is provided between the oil outlet pipe and the oil outlet of the oil reservoir to control the lubricating oil to flow into the oil outlet pipe in only one direction; the one-way valve structure includes a blocking block installed in the oil outlet pipe, a sealing valve core slidably installed in the oil outlet pipe for sealing the oil outlet of the oil reservoir, and a fourth compression spring connected between the blocking block and the sealing valve core; the fourth compression spring drives the sealing valve core to always tend to insert into the oil outlet of the oil reservoir for sealing.

[0025] By adopting the above technical solution, when the piston plate squeezes the lubricating oil, the oil pressure overcomes the elastic force of the fourth compression spring and pushes the sealing valve core to move, so that an oil supply gap is formed between the sealing valve core and the oil outlet of the oil reservoir to drive the lubricating oil to be transported to the oil storage chamber through the oil outlet pipe. When the piston plate returns to its original position, the fourth compression spring and the negative pressure in the oil reservoir work together to seal the oil outlet of the sealing valve core, prevent the lubricating oil from flowing back, and ensure the one-way delivery of the lubricating oil.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The lifting assembly drives the fixed mold base to rise vertically and detach from the worktable. Simultaneously, the conveying assembly precisely sprays lubricating oil onto the fixed mold base and the formed spline sleeve, reducing demolding friction. Then, the tilting assembly drives the fixed mold base to tilt. Under the weight of the formed spline sleeve itself and the lubrication of the lubricating oil, the spline sleeve detaches from the fixed mold base, achieving automatic demolding. This avoids indentations and deformation on the surface of the spline sleeve, thereby greatly improving product quality; 2. When the second motor drives the rotating shaft to rotate the rotating disk, it drives the inner clamping plate to center and clamp the blank from the inside. Tightening prevents deformation caused by concentrated stress on the inner side of the billet. Simultaneously, the helical gear structure synchronously drives the second threaded rod to rotate, causing the outer clamping half-ring to move inward to clamp the outer side of the billet. This achieves synchronous clamping force on both the inner and outer sides of the billet, ensuring accurate positioning of the billet during cold heading without deviation or shaking. 3. By placing the collection box directly below the positioning hole, it ensures that the spline sleeve and lubricating oil can be collected through the collection box when the spline sleeve is demolded. At the same time, when the spline sleeve falls into the collection box, the internal absorbent sponge can buffer the impact force of the spline sleeve during demolding, avoiding collision damage, and can also absorb excess lubricating oil for recycling. Attached Figure Description

[0027] Figure 1 is a schematic diagram of the overall structure of a cold heading forming equipment for spline sleeves; Figure 2 is a front sectional view of a cold heading forming equipment for spline sleeves; Figure 3 is a schematic diagram of the fixing mechanism; Figure 4 is a sectional view of the inner and outer clamping mechanism; Figure 5 is a side sectional view of a cold heading forming equipment for spline sleeves; Figure 6 is a sectional view of the drive box; Figure 7 is a partial enlarged view of part A in Figure 5.

[0028] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Worktable; 11. Fixed mold base; 12. Moving mold base; 121. Mold base body; 122. Mold core; 123. Third compression spring; 124. Oil supply chamber; 125. Oil supply hole; 13. Clamping box; 14. Mounting chamber; 15. Positioning hole; 16. Positioning groove; 2. Fixing mechanism; 21. Rotating shaft; 22. Third threaded rod; 23. Fixed slide plate; 24. Fixed semi-ring; 25. Dual-axis motor; 26. Synchronization structure; 261. Synchronization pulley; 262. Synchronization belt; 27. Fixed base; 28. Sliding hole 3. Internal and external clamping mechanism; 31. Internal clamping assembly; 311. Rotating shaft; 312. Rotating disk; 313. Hinge shaft; 314. Internal sliding plate; 315. Internal clamping plate; 316. Second motor; 317. Arc-shaped hole; 318. Internal sliding hole; 32. External clamping assembly; 321. Second threaded rod; 322. External sliding plate; 323. External clamping half ring; 324. Support plate; 325. External sliding hole; 33. Helical gear structure; 331. First helical gear; 332. Second helical gear; 34. Protective box; 35. Oil vent; 4. Drive mechanism; 41. Hydraulic cylinder; 42. Limiting telescopic guide column; 43. Connecting block; 5. Demolding mechanism; 51. Lifting assembly; 511. Bidirectional threaded rod; 512. Drive block; 513. Lifting plate; 514. Drive rod; 515. First motor; 516. Guide plate; 517. Slide groove; 518. Sliding block; 52. Oil tank; 521. Oil inlet pipe; 522. Control valve; 53. Drive box; 531. Oil storage chamber; 532. Support block; 54. First threaded rod; 55. Drive conveying assembly; 551. Drive plate; 552. Limiting plate; 553. Piston plate; 554. 555 Oil outlet pipe; 556 Oil delivery pipe; 557 First compression spring; 558 Moving block; 559 Moving groove; 550 Support rod; 56. One-way valve structure; 561 Fixed block; 562 Blocking round block; 563 Sealing valve core; 564 Fourth compression spring; 57. Tilting assembly; 571 Connecting rod; 572 Gear; 573 Telescopic column; 574 Rack; 575 Second compression spring; 576 Arc-shaped block; 577 Lifting hole; 6. Collection mechanism; 61 Collection box; 62 Absorbent sponge; 63 Sliding bar; 64 Guide groove; 65 Handle groove. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] This invention discloses a cold heading forming equipment for spline sleeves.

[0031] Referring to Figures 1 and 2, a cold heading forming device for spline sleeves includes a worktable 1, a fixed mold base 11, a moving mold base 12, a clamping box 13, an inner and outer clamping mechanism 3, a fixing mechanism 2, a driving mechanism 4, and a demolding mechanism 5. The demolding mechanism 5 includes a driving box 53.

[0032] A positioning hole 15 is provided on the top of the worktable 1, and the fixed mold base 11 is movably inserted into the positioning hole 15. A positioning groove 16 is provided in the fixed mold base 11 for preliminary positioning of the blank. The drive mechanism 4 is installed on the drive box 53 and is used to drive the moving mold base 12 and the fixed mold base 11 to close the mold and cold-forge the blank. The clamping box 13 is fixedly installed on the fixed mold base 11. The inner and outer clamping mechanisms 3 are installed in the clamping box 13 and are used to clamp the blank simultaneously from the inside and outside. The fixing mechanism 2 is fixedly installed on the worktable 1 and is used to fix the fixed mold base 11 to the worktable 1. The demolding mechanism 5 is fixedly installed on the worktable 1 and is used to demold the formed spline sleeve.

[0033] During operation, the fixed mold base 11 and clamping box 13 are first inserted into the positioning hole 15 for initial positioning. Then, the fixing mechanism 2 is activated to clamp and fix the fixed mold base 11 to the worktable 1, preventing displacement or vibration of the fixed mold base 11 due to the cold heading impact. Next, the blank is inserted into the positioning groove 16, and then the inner and outer clamping mechanisms 3 are activated to clamp the blank from the inside and outside, preventing displacement or shaking during cold heading and improving product forming accuracy. Then, the driving mechanism 4 is activated to drive the moving mold base 12 to close with the fixed mold base 11 and perform cold heading of the blank. After cold heading, the demolding mechanism 5 is activated to remove the formed spline sleeve from the fixed mold base 11.

[0034] Referring to Figures 1 and 3, the fixing mechanism 2 includes a rotating shaft 21, a third threaded rod 22, a fixing slide plate 23, a fixing half-ring 24, a dual-axis motor 25, and a synchronization structure 26. The synchronization structure 26 includes two synchronization pulleys 261 and a synchronization belt 262.

[0035] The workbench 1 has an internal mounting chamber 14, and the fixing mechanism 2 is installed inside the mounting chamber 14. A fixing seat 27 is fixedly installed on the inner bottom wall of the mounting chamber 14. A dual-axis motor 25 is fixedly installed on the fixing seat 27. The output end of the dual-axis motor 25 is fixedly connected to a rotating shaft 21 via a coupling. The end of the rotating shaft 21 is rotatably mounted on the side wall of the mounting chamber 14. Both ends of the third threaded rod 22 are rotatably mounted on the side wall of the mounting chamber 14. A fixing slide plate 23 is threadedly connected to the outer side of the third threaded rod 22, and a fixing half-ring 24 is fixedly mounted on the fixing slide plate 23. A sliding hole 28 is provided on the top of the workbench 1, and the fixing slide plate 23 is slidably installed within the sliding hole 28.

[0036] Both the third threaded rod 22 and the outer side of the rotating shaft 21 are fixedly mounted with synchronous pulleys 261. The synchronous belt 262 is sleeved on the outer side of the two synchronous pulleys 261. When the dual-shaft motor 25 drives the rotating shaft 21 to rotate, the third threaded rod 22 is driven to rotate synchronously with the cooperation of the synchronous pulleys 261 and the synchronous belt 262.

[0037] In this embodiment, the number of the synchronization structure 26, the rotating shaft 21, the third threaded rod 22, the fixed slide plate 23, the sliding hole 28, and the fixed half ring 24 are all two and are symmetrically arranged with the worktable 1 as the center.

[0038] During operation, the dual-axis motor 25 drives the two rotating shafts 21 to rotate. When the two rotating shafts 21 rotate, the synchronous pulley 261 and the synchronous belt 262 drive the two third threaded rods 22 to rotate synchronously. When the two third threaded rods 22 rotate, they drive the fixed sliding plate 23 connected to them to move towards each other along the sliding hole 28, thereby driving the two fixed half rings 24 to move towards each other along the sliding hole 28. This fixes the fixed mold base 11 and the worktable 1 with the two fixed half rings 24, preventing the fixed mold base 11 from being displaced or vibrating due to the cold forging impact force.

[0039] Referring to Figure 4, the inner and outer clamping mechanism 3 includes an outer clamping component 32, an inner clamping component 31, and a helical gear structure 33. The helical gear structure 33 includes a first helical gear 331 and a second helical gear 332.

[0040] The inner clamping assembly 31 includes a rotating shaft 311, a rotating disk 312, a hinge shaft 313, an inner sliding plate 314, an inner clamping plate 315, and a second motor 316.

[0041] The second motor 316 is fixedly mounted on the inner bottom wall of the clamping box 13, and the output end of the second motor 316 is fixedly connected to the rotating shaft 311 via a coupling. The rotating disk 312 is fixedly mounted on the top of the rotating shaft 311, and an arc-shaped hole 317 is opened on the surface of the rotating disk 312. The hinge shaft 313 is slidably mounted in the arc-shaped hole 317, and the inner sliding plate 314 is fixedly mounted on the hinge shaft 313. An inner sliding hole 318 is opened on the inner bottom wall of the fixed mold base 11, and the inner sliding plate 314 is slidably mounted in the inner sliding hole 318. An inner clamping plate 315 is fixedly mounted on the top of the inner sliding plate 314.

[0042] The external clamping assembly 32 includes a second threaded rod 321, an external sliding plate 322, and an external clamping half ring 323.

[0043] A support plate 324 is fixedly installed on the inner bottom wall of the clamping box 13. The end of the second threaded rod 321 is rotatably installed on the inner side wall of the clamping box 13, and the outer side of the second threaded rod 321 is rotatably installed on the support plate 324. The outer sliding plate 322 is threadedly connected to the second threaded rod 321. The outer clamping half ring 323 is fixedly installed on the outer sliding plate 322. An outer sliding hole 325 is opened on the inner bottom wall of the fixed mold base 11, and the outer sliding plate 322 is slidably installed in the outer sliding hole 325.

[0044] The first helical gear 331 is fixedly installed on the outside of the second threaded rod 321, and the second helical gear 332 is fixedly installed on the outside of the rotating shaft 311. The second helical gear 332 meshes with the first helical gear 331.

[0045] The inner bottom wall of the clamping box 13 has multiple oil penetration holes 35 and an installation groove. A protective box 34 is installed in the installation groove. The protective box 34 is fitted on the outside of the second motor 316 to protect the second motor 316.

[0046] During operation, after the billet is placed in the positioning groove 16, the second motor 316 is started to drive the rotating shaft 311 to rotate. When the rotating shaft 311 rotates, it drives the rotating disk 312 to rotate. When the rotating disk 312 rotates, it drives the hinge shaft 313 to slide along the arc-shaped hole 317, which in turn drives the inner sliding plate 314 to expand outward along the inner sliding hole 318, and further drives the inner clamping plate 315 to expand outward along the inner sliding hole 318 to clamp the inner side of the billet.

[0047] On the other hand, it drives the second helical gear 332 to rotate. When the second helical gear 332 rotates, it drives the first helical gear 331 that meshes with it to rotate. When the first helical gear 331 rotates, it drives the second threaded rod 321 to rotate. When the second threaded rod 321 rotates, it drives the outer sliding plate 322 that is threaded to it to move along the outer sliding hole 325. This further drives the outer clamping half ring 323 to move along the outer sliding hole 325 and clamp the outside of the blank.

[0048] Meanwhile, since the second helical gear 332 has more teeth than the first helical gear 331, when the second helical gear 332 rotates once, the first helical gear 331 rotates more times than the second helical gear 332 rotates once. This ensures that the inner clamping plate 315 and the outer clamping half ring 323 can clamp the inner and outer sides of the blank simultaneously, preventing the blank from shifting or shaking during the cold heading process and improving the product forming accuracy.

[0049] Referring to Figure 5, the drive mechanism 4 includes a hydraulic cylinder 41 and a limiting telescopic guide post 42. The moving mold base 12 includes a mold base body 121 and a mold core 122.

[0050] Hydraulic cylinder 41 is fixedly installed on the top inner side of drive box 53, and the output end of hydraulic cylinder 41 is fixedly connected to mold base body 121. Connecting block 43 is fixedly installed on the outer side of mold base body 121. One end of limiting telescopic guide post 42 is fixedly installed on the top inner side of drive box 53, and the other end of limiting telescopic guide post 42 is fixedly installed on connecting block 43.

[0051] The mold core 122 is slidably installed inside the mold base body 121. A third compression spring 123 is fixedly connected to the inner side of the mold base body 121, and the other end of the third compression spring 123 is fixedly connected to the mold core 122. The third compression spring 123 drives the mold core 122 to always have a downward tendency.

[0052] During operation, the hydraulic cylinder 41 drives the moving mold base 12 to move downwards. During this downward movement, the limiting telescopic guide post 42 provides guidance and limits the movement, ensuring the moving mold base 12 remains stable. Simultaneously, as the moving mold base 12 moves downwards, the mold core 122 first inserts into the fixed mold base 11. As it continues to move downwards, the mold core 122 stops moving, and the mold base body 121 continues to move downwards, compressing the third compression spring 123 and pressing the blank, thus cold-forging the blank and preventing deformation during the cold-forging process.

[0053] Referring to Figures 5 and 6, the demolding mechanism 5 also includes a lifting assembly 51, a first threaded rod 54, an oil tank 52, a drive and conveying assembly 55, and a tilting assembly 57.

[0054] The lifting assembly 51 is used to drive the fixed mold base 11 to move vertically.

[0055] Referring to Figure 6, the lifting assembly 51 includes a bidirectional threaded rod 511, a drive block 512, a lifting plate 513, a drive rod 514, and a first motor 515.

[0056] The first motor 515 is fixedly mounted on the drive housing 53. Both ends of the bidirectional threaded rod 511 are rotatably mounted on the inner sidewall of the drive housing 53. The outer side of the bidirectional threaded rod 511 is provided with two external threads with opposite directions. The output end of the first motor 515 is fixedly connected to one end of the bidirectional threaded rod 511 via a coupling. The drive block 512 is threadedly connected to the bidirectional threaded rod 511. One end of the drive rod 514 is hinged to the drive block 512, and the other end of the drive rod 514 is hinged to the lifting plate 513. The lifting plate 513 is threadedly connected to the first threaded rod 54. A guide plate 516 is fixedly mounted on the inner side of the drive housing 53. The drive block 512 is slidably sleeved on the guide plate 516. A slide groove 517 is provided on the inner sidewall of the drive housing 53. A slider 518 is fixedly mounted on the outer side of the lifting plate 513. The slider 518 is slidably mounted in the slide groove 517.

[0057] Referring to Figure 5, an oil storage chamber 531 is provided inside the drive box 53, and an oil delivery chamber 124 is provided inside the mold base body 121. An oil delivery hole 125 is provided at the bottom of the oil delivery chamber 124. The oil storage tank 52 is fixedly installed inside the drive box 53. A support block 532 is fixedly installed on the inner wall of the drive box 53. One end of the first threaded rod 54 is rotatably installed on the drive box 53, and the other end of the first threaded rod 54 is rotatably installed on the support block 532. The oil inlet of the oil storage tank 52 is connected to an oil inlet pipe 521, and the oil inlet pipe 521 passes through the drive box 53. A control valve 522 is provided on the outside of the oil inlet pipe 521 to facilitate the opening and closing of the oil inlet pipe 521.

[0058] The drive delivery assembly 55 includes a drive plate 551, a limit plate 552, a piston plate 553, an oil outlet pipe 554, an oil delivery pipe 555, and a first compression spring 556.

[0059] Referring to Figures 5 and 6, the drive plate 551 is threaded to the outside of the first threaded rod 54. A movable block 557 is fixedly installed on the outside of the drive plate 551. A movable groove 558 is provided on the inner side of the drive box 53, and the movable block 557 is slidably installed in the movable groove 558. One end of the first compression spring 556 is fixedly connected to the top of the drive plate 551, and the other end of the first compression spring 556 is fixedly connected to the bottom of the limiting plate 552. The first compression spring 556 drives the limiting plate 552 to always have an upward tendency. The limiting plate 552 is slidably installed on the first threaded rod 54. A support rod 559 is fixedly installed on the top of the limiting plate 552. The top of the support rod 559 is fixedly installed on the piston plate 553 and passes through the oil reservoir 52. The piston plate 553 is slidably installed in the oil reservoir 52. The oil outlet pipe 554 of the oil reservoir 52 is connected to the oil storage chamber 531. The inlet of the oil pipeline 555 is connected to the oil storage chamber 531, and the outlet of the oil pipeline 555 is connected to the oil delivery chamber 124.

[0060] Referring to Figure 7, a one-way valve structure 56 is provided between the oil outlet pipe 554 and the oil outlet of the oil storage tank 52 to control the lubricating oil to flow into the oil outlet pipe 554 in only one direction.

[0061] The one-way valve structure 56 includes a blocking block 562, a sealing valve core 563, and a fourth compression spring 564.

[0062] A fixing block 561 is installed inside the oil outlet pipe 554, and a blocking block 562 is fixedly installed on the fixing block 561. A sealing valve core 563 is slidably installed inside the oil outlet pipe 554. One end of a fourth compression spring 564 is fixedly connected to the sealing valve core 563, and the other end of the fourth compression spring 564 is fixedly connected to the blocking block 562. The fourth compression spring 564 drives the sealing valve core 563 to always tend to insert into the oil outlet of the oil reservoir 52 for sealing.

[0063] The one-way valve structure 56 has an open state and a sealed state.

[0064] When the one-way valve structure 56 is in a sealed state, the piston plate 553 moves towards the side closer to the limit plate 552, causing the lubricating oil in the oil reservoir 52 to move downward and generate negative pressure. At this time, the negative pressure and the reset force of the fourth compression spring 564 together drive the sealing valve core 563 to move towards the side closer to the oil reservoir 52, pressing the sealing valve core 563 against the oil outlet of the oil reservoir 52 to seal it and prevent the lubricating oil in the oil reservoir 52 from flowing back to the oil outlet pipe 554.

[0065] When the one-way valve structure 56 is in the open state, the piston plate 553 moves away from the limit plate 552, causing the sealing valve core 563 to move away from the oil reservoir 52 against the elastic box of the fourth compression spring 564. This causes the sealing valve core 563 to no longer seal the oil outlet of the oil reservoir 52, thereby creating an oil supply gap between the sealing valve core 563 and the oil outlet of the oil reservoir 52 to drive the lubricating oil to be transported to the oil reservoir 531 through the oil outlet pipe 554.

[0066] Referring to Figures 5 and 6, the flipping assembly 57 includes a connecting rod 571, a gear 572, a telescopic column 573, a rack 574, and a second compression spring 575.

[0067] An arc-shaped block 576 is fixedly installed on the lifting plate 513. A connecting rod 571 is rotatably installed on the arc-shaped block 576, and the connecting rod 571 is fixed to the fixed mold base 11 by bolts. A lifting hole 577 is opened on the drive box 53, and the connecting rod 571 is slidably installed in the lifting hole 577. A gear 572 is fixedly installed on the connecting rod 571. One end of the telescopic column 573 is fixedly installed on the limiting plate 552, and the other end of the telescopic column 573 is fixedly installed on the rack 574. A second compression spring 575 is sleeved on the outside of the telescopic column 573. One end of the second compression spring 575 is fixedly connected to the limiting plate 552, and the other end of the second compression spring 575 is fixedly connected to the rack 574. The second compression spring 575 drives the rack 574 to always have an upward tendency. A limiting structure is connected between the limiting plate 552 and the rack 574. Under the action of the limiting structure, the telescopic column 573 and the second compression spring 575, the rack 574 can only move vertically within a small range, so that the gear 572 and the rack 574 mesh more accurately.

[0068] During operation, when the blank needs to be demolded after cold heading, the oil inlet pipe 521 is first connected to the external oil storage device. Then, the control valve 522 is opened to deliver external lubricating oil to the oil storage tank 52 through the oil inlet pipe 521. Then, the control valve 522 is closed to prevent lubricating oil from flowing back from the oil inlet pipe 521 to the external oil storage device. Then, the fixing mechanism 2 is activated so that the fixed mold base 11 is no longer fixed to the worktable 1. Then, the first motor 515 is started to drive the bidirectional threaded rod 511 to rotate. When the bidirectional threaded rod 511 rotates, it drives the drive block 512 to move along the guide plate 516. When the drive block 512 moves, it drives the drive rod 514 to rotate. When the drive rod 514 rotates, it drives the lifting plate 513 to move upward along the slide groove 517. When the lifting plate 513 moves upward, it drives the connecting rod 571 and the fixed mold base 11 to move upward along the lifting hole 577, and at the same time, it drives the first threaded rod 54 to rotate.

[0069] When the first threaded rod 54 rotates, it drives the drive plate 551, which is threaded to it, to move upward along the moving groove 558. After the drive plate 551 moves upward a certain distance, it overcomes the elastic force of the first compression spring 556 and pushes the limit plate 552 to move upward synchronously. When the limit plate 552 moves upward, it pushes the piston plate 553 to slide upward in the oil storage tank 52. When the piston plate 553 moves upward, it squeezes the lubricating oil, causing the one-way valve structure 56 to be in the open state, so that the lubricating oil in the oil storage tank 52 flows to the oil storage chamber 531 through the oil outlet pipe 554. Then, the lubricating oil is transported to the oil delivery chamber 124 through the oil delivery pipe 555. Finally, the lubricating oil is sprayed onto the fixed mold base 11 and the formed spline sleeve through the oil delivery hole 125 for lubrication.

[0070] When the limiting plate 552 continues to move upward and comes into contact with the oil reservoir 52, the piston plate 553 stops moving and no longer supplies lubricating oil from the oil reservoir 52. Meanwhile, the lifting plate 513 and the fixed mold base 11 continue to move upward. At this time, the gear 572 moves upward and meshes with the rack 574. During meshing, the limiting structure, the telescopic column 573, and the second compression spring 575 ensure accurate meshing of the gear 572 and rack 574. When the lifting plate 513 continues to move upward, the meshing of the gear 572 and rack 574 causes the gear 572 to rotate. The rotation of the gear 572 causes the connecting rod 571 to rotate, and the rotation of the connecting rod 571 causes the fixed mold base 11 to flip. Under the weight of the formed spline sleeve and the lubrication of the lubricating oil, the spline sleeve detaches from the fixed mold base 11, achieving automatic demolding. This avoids indentations and deformation on the surface of the spline sleeve, thus greatly improving product quality.

[0071] Meanwhile, the sprayed lubricating oil can also generate an oil film on the surface of the fixed mold base 11 and the formed spline sleeve, thereby preventing the fixed mold base 11 and the formed spline sleeve from rusting.

[0072] A collection mechanism 6 is provided directly below the positioning hole 15 to collect the formed spline sleeve and the sprayed lubricating oil.

[0073] Referring to Figure 2, the collection mechanism 6 includes a collection box 61 and an absorbent sponge 62 that is detachably installed inside the collection box 61.

[0074] A sliding strip 63 is fixedly installed on the collection box 61, and a guide groove 64 is provided on the worktable 1. The sliding strip 63 is slidably installed in the guide groove 64. An absorbent sponge 62 is laid on the inner bottom wall of the collection box 61. The absorbent sponge 62 is used to absorb lubricating oil and protect the spline sleeve. A handle groove 65 is provided on the collection box 61 to facilitate pulling the collection box 61.

[0075] During operation, when the fixed mold base 11 is flipped, the spline sleeve and lubricating oil will fall off. The fallen spline sleeve and lubricating oil will fall into the collection box 61 through the positioning hole 15. At this time, the absorbent sponge 62 will protect the fallen spline sleeve and absorb the lubricating oil attached to the surface. It will also absorb the fallen lubricating oil, thus facilitating the absorption and recycling of the lubricating oil.

[0076] Meanwhile, when it is necessary to replace the absorbent sponge 62, the collection box 61 can be pulled out of the workbench 1 by pulling the handle groove 65, and then the absorbent sponge 62 can be taken out of the collection box 61 and the new absorbent sponge 62 can be laid on the inner bottom wall of the collection box 61.

[0077] When the lubricating oil is sprayed onto the fixed mold base 11 and the formed spline sleeve for lubrication, the lubricating oil will enter the fixed mold base 11. Subsequently, the lubricating oil will enter the clamping box 13 through the inner sliding hole 318 and the outer sliding hole 325. At this time, the protective box 34 protects the second motor 316 to prevent the lubricating oil from entering the second motor 316 and causing damage. At the same time, the lubricating oil entering the clamping box 13 can be transported through the oil penetration hole 35 and fall into the collection box 61 for collection.

[0078] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A cold heading forming device for spline sleeves, comprising a worktable (1), a fixed mold base (11) mounted on the worktable (1), and a movable mold base (12) cooperating with the fixed mold base (11), characterized in that, It also includes a demolding mechanism (5) installed on the worktable (1) for demolding the formed spline sleeve; the demolding mechanism (5) includes a drive box (53) installed on the worktable (1), a lifting assembly (51) installed in the drive box (53) for driving the fixed mold base (11) to move vertically, a first threaded rod (54) driven by the lifting assembly (51) to rotate, an oil storage tank (52) installed in the drive box (53), a drive delivery assembly (55) driven by the first threaded rod (54) to spray the lubricating oil stored in the oil storage tank (52) onto the fixed mold base (11) and the spline sleeve, and a flipping assembly (57) installed in the drive box (53) for driving the fixed mold base (11) to flip when the fixed mold base (11) moves vertically.

2. The cold heading forming equipment for spline sleeves according to claim 1, characterized in that, The drive box (53) has an oil storage chamber (531) and the moving mold base (12) has an oil delivery chamber (124). The bottom of the oil delivery chamber (124) has an oil delivery hole (125). The drive delivery assembly (55) includes a drive plate (551) threadedly connected to the first threaded rod (54), a limiting plate (552) slidably mounted on the first threaded rod (54), and a piston plate mounted on the limiting plate (552) and slidably mounted in the oil storage tank (52). (553) An oil outlet pipe (554) connecting the oil storage tank (52) and conveying lubricating oil to the oil storage cavity (531), an oil delivery pipe (555) connecting the oil storage cavity (531) and conveying lubricating oil in the oil storage cavity (531) to the oil delivery cavity (124), and a first compression spring (556) installed between the drive plate (551) and the limiting plate (552); the first compression spring (556) drives the limiting plate (552) to always have an upward tendency.

3. The cold heading forming equipment for spline sleeves according to claim 2, characterized in that, The lifting assembly (51) includes a bidirectional threaded rod (511) rotatably mounted in the drive box (53), a drive block (512) threadedly connected to the bidirectional threaded rod (511), a lifting plate (513) threadedly connected to the first threaded rod (54), a drive rod (514) hinged between the lifting plate (513) and the drive block (512), and a first motor (515) mounted on the drive box (53) for driving the bidirectional threaded rod (511) to rotate.

4. The cold heading forming equipment for spline sleeves according to claim 3, characterized in that, The flipping assembly (57) includes a connecting rod (571) mounted on the lifting plate (513) and detachably mounted on the fixed mold base (11), a gear (572) mounted on the connecting rod (571), a telescopic column (573) mounted on the limiting plate (552), a rack (574) mounted on the telescopic column (573), and a second compression spring (575) sleeved on the telescopic column (573) and connected between the limiting plate (552) and the rack (574); the second compression spring (575) drives the rack (574) to always have an upward tendency; when the limiting plate (552) abuts against the oil tank (52) and no longer moves, the gear (572) continues to move upward and begins to mesh with the rack (574), thereby driving the fixed mold base (11) to flip.

5. The cold heading forming equipment for spline sleeves according to claim 1, characterized in that, A clamping box (13) is installed on the fixed mold base (11). The clamping box (13) is provided with an inner and outer clamping mechanism (3) for simultaneously clamping the blank inside and outside. The inner and outer clamping mechanism (3) includes an outer clamping assembly (32) for clamping the outer side of the blank and an inner clamping assembly (31) for clamping the inner side of the blank. The inner clamping assembly (31) includes a rotating shaft (311) installed on the clamping box (13) and a clamping device (311) installed on the rotating shaft (311). The rotating disk (312) on the 11), the hinge shaft (313) slidably mounted on the rotating disk (312), the inner sliding plate (314) mounted on the hinge shaft (313) and slidably connected to the fixed mold base (11), the inner clamping plate (315) mounted on the inner sliding plate (314) and used to clamp the inner side of the blank, and the second motor (316) mounted on the clamping box (13) and used to drive the rotating shaft (311) to rotate.

6. The cold heading forming equipment for spline sleeves according to claim 5, characterized in that, The external clamping assembly (32) includes a second threaded rod (321) rotatably mounted on the clamping box (13), an external sliding plate (322) threadedly connected to the second threaded rod (321) and slidably mounted on the fixed mold base (11), and an external clamping half ring (323) mounted on the external sliding plate (322) for clamping the outer side of the blank; the internal and external clamping mechanism (3) also includes a helical gear structure (33), which is used to connect the second threaded rod (321) and the rotating shaft (311). When the second motor (316) drives the rotating shaft (311) to rotate, the helical gear structure (33) synchronously drives the second threaded rod (321) to rotate.

7. The cold heading forming equipment for spline sleeves according to claim 1, characterized in that, The workbench (1) is equipped with a fixing mechanism (2) for fixing the outside of the fixed mold base (11); the fixing mechanism (2) includes a rotating shaft (21) rotatably mounted on the workbench (1), a third threaded rod (22) rotatably mounted on the workbench (1), a synchronization structure (26) for driving the rotating shaft (21) and the third threaded rod (22) to rotate synchronously, a fixing slide plate (23) threadedly connected to the third threaded rod (22), a fixing half ring (24) mounted on the fixing slide plate (23) for fixing the outside of the fixed mold base (11), and a dual-axis motor (25) mounted inside the workbench (1) for driving the rotating shaft (21) to rotate.

8. The cold heading forming equipment for spline sleeves according to claim 1, characterized in that, The drive box (53) is equipped with a drive mechanism (4) for driving the moving mold base (12) and the fixed mold base (11) to close the mold; the drive mechanism (4) includes a hydraulic cylinder (41) installed on the drive box (53) for driving the moving mold base (12) and the fixed mold base (11) to close the mold, and a limiting telescopic guide column (42) installed on the fixed mold base (11) for limiting and guiding the movement of the fixed mold base (11); the moving mold base (12) includes a mold base body (121) and a mold core (122) slidably installed in the mold base body (121); a third compression spring (123) is connected between the mold base body (121) and the mold core (122), and the third compression spring (123) drives the mold core (122) to always have a downward tendency.

9. The cold heading forming equipment for spline sleeves according to claim 1, characterized in that, The workbench (1) is provided with a positioning hole (15), and the fixed mold base (11) is inserted into the positioning hole (15). A collection mechanism (6) for collecting the formed spline sleeve and sprayed lubricating oil is provided directly below the positioning hole (15). The collection mechanism (6) includes a collection box (61) that is slidably installed on the workbench (1) for collecting lubricating oil and spline sleeve, and an absorbent sponge (62) that is detachably installed in the collection box (61). The absorbent sponge (62) is used to absorb the lubricating oil and protect the spline sleeve. A handle groove (65) is provided on the collection box (61) for easy pulling of the collection box (61).

10. A cold heading forming equipment for spline sleeves according to claim 2, characterized in that, A one-way valve structure (56) is provided between the oil outlet pipe (554) and the oil outlet of the oil reservoir (52) to control the lubricating oil to flow into the oil outlet pipe (554) in only one direction. The one-way valve structure (56) includes a blocking block (562) installed in the oil outlet pipe (554), a sealing valve core (563) slidably installed in the oil outlet pipe (554) for sealing the oil outlet of the oil reservoir (52), and a fourth compression spring (564) connected between the blocking block (562) and the sealing valve core (563). The fourth compression spring (564) drives the sealing valve core (563) to always have the tendency to insert into the oil outlet of the oil reservoir (52) for sealing.

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