A die and die forging process for producing high-hardness pipe plugging wire

Abstract

The present invention relates to a die and die forging process for producing high-hardness pipe plugging wires, and belongs to the technical field of forging devices; a die for producing high-hardness pipe plugging wires, comprising: arranging a double guide rod to link a trapezoidal plate and a rack mechanism, driving a material-taking arm to rotate unidirectionally to complete material unloading; utilizing an electromagnet to control the clamping arm in conjunction with a spring reset to realize automatic loading; and a built-in spring bearing plate in the base to realize ejection and reset of the forged piece. The die structure integrates a conveyor belt for automatic feeding, a double magnet energy-saving clamping device, and an inclined self-locking device, eliminating manual intervention links and solving the problems of high-temperature burns and efficiency bottlenecks. The device is mainly used for high-temperature die forging of metal pipe plugging wires, and significantly improves production safety and automation level through the synergistic effect of mechanical linkage and electromagnetic control.

Description

Technical Field

[0001] The present invention relates to the technical field of forging devices, and in particular to a die and die forging process for manufacturing high-hardness pipe plugging wires. Background Art

[0002] The pipe plug is a crucial component of a water pipe plug, typically forming a complete plugging device together with the main body of the plug. A water pipe plug is typically made of metal (such as copper, iron, etc.) or plastic and consists of a pipe plug, internal threads, and a sealing ring.

[0003] When forging pipe plug wire, the workpiece needs to be heated to 1200℃ in a heating furnace, and then pre-forged to form a rough blank. The temperature of the rough blank after pre-forging is 1150℃, and then the rough blank is placed in a die forging die for die forging.

[0004] However, the current die forging process still has the following technical bottlenecks:

[0005] 1. The temperature of the blank during the forging process can reach up to 1150°C, and manual handling can easily cause burns, which does not comply with modern industrial safety standards;

[0006] 2. Manual operation makes it difficult to compress the die forging cycle, and the overall production capacity is limited by the efficiency of human-machine collaboration, making it difficult to meet large-scale production needs.

[0007] In response to the above problems, the present invention document proposes a die and die forging process for producing high-hardness pipe plug wires. Summary of the Invention

[0008] The purpose of the present invention is to solve the shortcomings of the existing manual loading and unloading and manual operation that greatly reduces the die forging efficiency of pipe plugging wires, and to propose a die and die forging process for making high-hardness pipe plugging wires.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A mold for making high-hardness pipe plugging wires, comprising:

[0011] A base, the top of which is fixed with a top plate via a support column;

[0012] A hydraulic cylinder is fixedly provided through the top plate, and its piston rod is connected to the mold base;

[0013] The upper die is fixed to the bottom of the die base and forms a forging cavity with the lower die on the top of the base;

[0014] The first guide rod and the second guide rod are vertically fixed on both sides of the top of the mold base and slide through the top plate;

[0015] The conveyor is set on one side of the base and is used to transport the rough embryos;

[0016] Two rotating arms are rotatably mounted on the top of the base via a rotating shaft and are used to transfer the rough blank to the lower mold;

[0017] The material taking arm is arranged on the top of the base at one side away from the rotating arm;

[0018] The unloading structure includes a trapezoidal plate linked to the first guide rod, a second rack slidably connected to the top plate, and a one-way bearing connected to the retrieving arm for driving the retrieving arm to rotate in one direction to complete unloading;

[0019] The feeding structure includes a pushing block linked to the second guide rod, a first rack slidably connected to the top plate, and a torsion spring transmission-connected to the rotating arm, which is used to drive the rotating arm to reset and clamp the rough blank.

[0020] In a possible design, the blanking structure further includes:

[0021] A rotating rod is rotatably mounted between the base and the top plate;

[0022] A one-way bearing, the inner ring of which is fixedly sleeved on the outer wall of the rotating rod, and the outer ring is fixedly connected to the second gear;

[0023] a trapezoidal block, fixedly connected to the second rack and elastically connected to the top plate via a fourth spring;

[0024] Among them, the trapezoidal plate squeezes the trapezoidal block when the first guide rod moves upward, driving the second rack to move horizontally, so that the second gear drives the rotating rod and the material taking arm to rotate 180 degrees through the one-way bearing.

[0025] In one possible design, the feeding arm is provided with a feeding notch, in which a polyurethane wear-resistant layer with a hardness of 90 Shore A is embedded; a limit rod is provided between the rotating rod and the top plate, which slides through the trapezoidal block and is sleeved with a fourth spring.

[0026] In a possible design, the feeding structure further includes:

[0027] The base is fixed on the top of the base, and the two ends of the rotating shaft are rotatably connected to the base;

[0028] a first gear fixed to one end of the rotating shaft and meshing with the first rack;

[0029] An L-shaped plate fixed to the outer wall of the first rack and elastically connected to the top plate via a plurality of first springs;

[0030] The pushing block pushes the L-shaped plate as the second guide rod moves upward, drives the first rack to move upward and drives the rotating shaft to rotate, so that the rotating arm swings toward the forging station.

[0031] In one possible design, a clamping structure is provided in the rotating arm, including:

[0032] A rotating shaft rotates and penetrates the rotating arm, and a ring-shaped electromagnet is embedded at one end thereof;

[0033] A sleeve is slidably mounted on the outer wall of the rotating shaft, one end of which is connected to the splint;

[0034] The first magnet block is fixed on the side of the clamping plate close to the rotating shaft and is magnetically engaged with the annular electromagnet;

[0035] The second spring has two ends respectively connected to the rotating shaft and the first magnet block, and is used for pushing the clamping plate to reset and clamp the rough blank.

[0036] In one possible design, a clamping structure is provided in the rotating arm, including:

[0037] Sliding grooves are provided on both sides of the rotating arm, in which the iron sliders are slidably connected;

[0038] A rotating shaft, rotating through the rotating arm;

[0039] A sleeve is slidably mounted on the outer wall of the rotating shaft, one end of which is connected to the splint;

[0040] The second spring has two ends connected to the rotating shaft and the clamping plate, and is used to push the clamping plate to return to its original position and clamp the rough blank;

[0041] A pull rope, one end of which is connected to the splint, and the other end passes through the shaft and is connected to the iron slider;

[0042] The base plate is fixed on one side of the lower mold, and the second magnet block is fixed on the inner side of the base plate;

[0043] Among them, when the rotating arm rotates to the give way slot, the second magnet block absorbs the iron slider and pulls down the pull rope, forcing the clamp to release the rough blank; the contact surface of the clamp is provided with a slope, which cooperates with the wedge shape at the top of the rough blank to achieve self-locking clamping.

[0044] In a possible design, the contact surface of the splint is provided with a frosted layer; the annular electromagnet adopts an N35 neodymium iron boron core; and the first magnet block is a sintered samarium cobalt magnet with a nickel-plated surface.

[0045] In one possible design, the base is provided with:

[0046] a circular cavity in which a plurality of vertical rods are fixed;

[0047] The connecting plate is slidably sleeved on the outer wall of the vertical rod and elastically connected to the bottom of the circular cavity through a third spring;

[0048] A connecting rod, one end of which fixes the connecting plate and the other end extends into the lower mold and fixes the carrying plate;

[0049] During forging, the carrier plate is pressed and moves downward, and after forging is completed, the third spring drives the carrier plate to move upward and reset.

[0050] In a possible design, the lower mold is provided with a clearance groove on both sides for avoiding the rotation trajectory of the rotating arm; the top height of the pushing block is lower than the top height of the trapezoidal plate, so that the loading structure is triggered only after the unloading action is completed.

[0051] In this application, a die forging process for making a high-hardness pipe plugging wire mold includes the following steps:

[0052] S1: Hydraulic cylinder drives forging and resetting:

[0053] The piston rod pushes the die seat and the upper die downward to forge the rough blank. During forging, the rough blank presses down the bearing plate and the connecting plate, and the third spring is compressed to store energy. After forging is completed, the piston rod drives the die upward to reset, and the third spring releases its elastic force to push the bearing plate and the forming pipe plug upward to reset.

[0054] S2: Trapezoidal plate linkage blanking mechanism:

[0055] When the mold base moves upward, the first guide rod drives the trapezoidal plate upward, and the trapezoidal plate and the trapezoidal block cooperate to push the second rack outward; the second rack drives the one-way bearing through the second gear to lock the rotating rod, driving the material picking arm to rotate 180 degrees to grab the pipe plug to the base side; when the mold moves downward, the fourth spring resets the second rack, and the one-way bearing switches to a free rotation state;

[0056] S3: Rack and pinion driven automatic loading:

[0057] When the mold seat continues to move upward, the push block drives the L-shaped plate and the first rack to move upward to compress the first spring. The first rack drives the rotating shaft and the rotating arm to rotate through the first gear, and the rough blank clamped by the clamp is transported; the annular electromagnet electromagnetically attracts the first magnet block to release the clamping of the clamp, and the loading is completed; when the mold moves downward, the rotating arm is reset under the action of the spring and torsion spring, and cooperates with the conveyor to transport the new rough blank to the clamping position. After the electromagnet is powered off, the second spring drives the clamp to re-clamp.

[0058] Compared with the prior art, the present invention has the following beneficial effects: the material picking arm is fixedly sleeved on the outer wall of the rotating rod, the outer wall of the rotating rod is sleeved with a one-way bearing, the outer ring of the one-way bearing is fixedly sleeved with a second gear, the bottom of the top plate is slidably connected to the second rack, and the second rack is meshed with the second gear, a trapezoidal block is fixed on one side of the second rack, and a trapezoidal plate is fixed on one side of the first guide rod; the trapezoidal plate moves up and cooperates with the trapezoidal block to drive the second rack to move outward, and the second rack drives the one-way bearing and the rotating rod to rotate through the second gear, and the pipe plug is grabbed through the material picking notch, thereby automatically completing the unloading of the pipe plug;

[0059] In the present invention, the two rotating arms are fixedly sleeved on the outer wall of the rotating shaft, one end of the rotating shaft is fixed with a first gear, a first rack is slidably penetrated in the top plate, an L-shaped plate is fixedly sleeved on the outer wall of the first rack, and a pushing block is fixed on one side of the second guide rod; the mold seat drives the L-shaped plate and the first rack to move upward through the pushing block, driving the rotating shaft and the rotating arm to rotate, and transporting the rough blank clamped by the clamping plate to the top of the lower mold, and then the annular electromagnet is energized, and the magnetic attraction of the annular electromagnet to the first magnet block pulls the clamping plate to one side, releasing the clamping plate from the rough blank, thereby completing the automatic loading operation;

[0060] In the present invention, the outer wall sliding sleeves of the plurality of vertical rods are provided with a common connecting plate, a plurality of third springs are fixed between the bottom of the connecting plate and the bottom inner wall of the circular cavity, and a carrying plate is fixed to the top of the connecting plate via a connecting rod; after the forging is completed, the piston rod of the hydraulic cylinder drives the die seat and the upper die to move upward and reset, and the third spring drives the carrying plate to move upward and reset the forged pipe plug, making it easier for the material removal arm to remove the pipe plug from the lower die later;

[0061] In the present invention, an iron slider is slidably connected in the sliding groove, a pull rope is fixed to one side of the clamping plate, one end of the pull rope is fixedly connected to the corresponding iron slider, and a second magnet block is fixed on the side of the two base plates that are close to each other; the rotating arm rotates in opposite directions under the action of the torsion spring and the first spring, and the clamping plate clamps the rough blank under the action of the inclined surface. When the rotating arm is loaded later, the second magnet block generates a magnetic attraction force on the iron slider, and the clamping plate is pulled outward by the pull rope, so that the rough blank can be placed on the carrying plate, avoiding the clamping of the rough blank by energizing and de-energizing the annular electromagnet, thereby saving energy consumption.

[0062] In the present invention, the mold base is driven upward by the hydraulic cylinder, and the trapezoidal plate, trapezoidal block, push block and L-shaped plate are coordinated in sequence to automatically complete unloading and loading, reducing the risks brought about by manual operation and greatly improving the forging efficiency of pipe plugging wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a schematic diagram of the three-dimensional structure of a mold for manufacturing high-hardness pipe plugging wires provided in Example 1 of the present invention;

[0064] Figure 2 This is a schematic diagram of a three-dimensional cross-sectional structure of a mold for manufacturing high-hardness pipe plugging wires provided in Example 1 of the present invention;

[0065] Figure 3 This is a partial three-dimensional cross-sectional structural diagram of a base and a lower mold of a mold for manufacturing high-hardness pipe plugging wires provided in Example 1 of the present invention;

[0066] Figure 4This is a schematic diagram of a three-dimensional exploded structure of a mold base, a first guide rod, and a second guide rod of a mold for manufacturing a high-hardness pipe plug provided in Example 1 of the present invention;

[0067] Figure 5 This is a schematic diagram of a three-dimensional exploded structure of a rotating rod, a second gear, and a first guide rod of a mold for manufacturing a high-hardness pipe plug provided by Example 1 of the present invention;

[0068] Figure 6 This is a schematic diagram of the three-dimensional structure of a rotating arm, an L-shaped plate, and a second guide rod of a mold for manufacturing a high-hardness pipe plug provided by Example 1 of the present invention;

[0069] Figure 7 This is a schematic diagram of a three-dimensional exploded structure of a rotating shaft, a torsion spring, and a second guide rod of a mold for manufacturing a high-hardness pipe plug provided in Example 1 of the present invention;

[0070] Figure 8 This is a schematic three-dimensional cross-sectional view of a rotating arm and a torsion spring of a mold for manufacturing a high-hardness pipe plug provided in Example 1 of the present invention;

[0071] Figure 9 This is a schematic diagram of the three-dimensional structure of a rotating arm, a lower mold, and a base plate of a mold for manufacturing high-hardness pipe plugging wires provided in Example 2 of the present invention;

[0072] Figure 10 This is a schematic diagram of a three-dimensional exploded structure of an iron slider and a second magnet block of a mold for manufacturing high-hardness pipe plugging wires provided in Example 2 of the present invention;

[0073] Figure 11 This is a schematic diagram of the three-dimensional exploded structure of a material removal notch, a sleeve and a rotating shaft of a mold for manufacturing high-hardness pipe plugging wire provided in Example 2 of the present invention.

[0074] In the figure: 1. Base; 2. Top plate; 3. Lower mold; 4. Hydraulic cylinder; 5. Mold base; 6. Upper mold; 7. First guide rod; 8. Second guide rod; 9. Conveyor; 10. Base; 11. Rotating shaft; 12. Rotating arm; 13. Torsion spring; 14. First gear; 15. First rack; 16. L-shaped plate; 17. Sliding rod; 18. First spring; 19. Push block; 20. Gap; 21. Rotating shaft; 22. Ring electromagnet; 23. Sleeve; 24. Second spring; 25. Clamp ; 26. First magnet block; 27. Carrying plate; 28. Connecting rod; 29. ​​Circular cavity; 30. Connecting plate; 31. Vertical rod; 32. Third spring; 33. Rotating rod; 34. Pick-up arm; 35. Pick-up notch; 36. One-way bearing; 37. Second gear; 38. Second rack; 39. Trapezoidal block; 40. Limiting rod; 41. Fourth spring; 42. Trapezoidal plate; 43. Sliding groove; 44. Iron slider; 45. Pull rope; 46. Base plate; 47. Second magnet block; 48. Inclined plane. DETAILED DESCRIPTION

[0075] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0076] Example 1: Reference Figure 1 and Figure 2 The mold relates to the technical field of forging devices. The mold includes a base 1 made of Q235 carbon steel. The top of the base 1 is fixed with a 304 stainless steel top plate 2 via a GCr15 bearing steel support column (diameter φ50-80mm). A hydraulic cylinder 4 is fixed through the top plate 2. The piston rod of the hydraulic cylinder 4 is connected to the mold base 5 via a 42CrMo alloy steel connector. The bottom of the mold base 5 is fixed with an SKD11 mold steel upper mold 6 with a hardness of HRC58-62. The top of the base 1 is fixed with a lower mold 3 that cooperates with the upper mold 6. In this way, the hydraulic cylinder 4 can drive the mold base 5 and the upper mold 6 to move up and down to complete the forging of the pipe plug.

[0077] Reference Figure 1 and Figure 2 Furthermore, a first guide rod 7 and a second guide rod 8 are fixed to either side of the top of the mold base 5, and the top ends of the first and second guide rods 7 and 8 slide through the top plate 2. This ensures the stability of the mold base 5 during its up and down movement. A conveyor 9 is provided on one side of the base 1. This can be a belt conveyor with grooves adapted for the rough blanks (the belt can be coated with a 2-4mm thick alumina ceramic coating to improve high-temperature resistance), which is used to transport the rough blanks. Two rotating arms 12 (the main body of the rotating arms 12 is made of 304 stainless steel) are provided on the top of the base 1. These rotating arms 12 are used to transport the rough blanks from the conveyor 9 to the lower mold 3.

[0078] Reference Figure 1 、 Figure 2 、 Figure 4 and Figure 5 To achieve automatic unloading, a pick-up arm 34 is provided on the top side of the base 1, away from the rotating arm 12. The pick-up arm 34 is used to remove the forged pipe plug from the lower die 3. To enable the rotation of the pick-up arm 34, a unloading structure is provided. This unloading structure includes a rotating rod 33 that rotates between the base 1 and the top plate 2. The pick-up arm 34 is fixedly mounted on the outer wall of the rotating rod 33 and positioned above the lower die 3. A pick-up notch 35 is provided on one side of the pick-up arm 34 for receiving the pipe plug. The main body of the pick-up arm 34 is made of aluminum alloy 6061, and the pick-up notch 35 is inlaid with a polyurethane wear-resistant layer (hardness 90 Shore A). A one-way bearing 36 is mounted on the outer wall of the rotating rod 33, and the inner ring of the one-way bearing 36 is mounted on the outer wall of the rotating rod 33. A second gear 37 is fixedly mounted on the outer ring of the one-way bearing 36, thereby driving the rotating rod 33 to rotate in one direction. A second rack 38 is slidably connected to the bottom of the top plate 2, and the second rack 38 meshes with the second gear 37. A trapezoidal block 39 is fixed to one side of the second rack 38, which is slidably connected to the bottom of the top plate 2. A limit rod 40 is fixed to the bottom of the top plate 2 via a fixed plate. One end of the limit rod 40 slides through the trapezoidal block 39. A fourth spring 41 (with a stiffness coefficient of 50 N / mm) is sleeved on the outer wall of the limit rod 40. One end of the fourth spring 41 is fixedly connected to the trapezoidal block 39, and the other end is fixedly connected to the fixed plate. A trapezoidal plate 42 is fixed to the side of the first guide rod 7 near the trapezoidal block 39.

[0079] Specifically, when the die holder 5 moves upward, it also moves the first guide rod 7 and the trapezoidal plate 42 upward. The combination of the trapezoidal plate 42 and the trapezoidal block 39 drives the second rack 38 outward. The second rack 38, via the second gear 37, rotates the one-way bearing 36. Because the one-way bearing 36 is locked with the rotating rod 33, the rotating rod 33 drives the pick-up arm 34 to rotate 180°. During this rotation, the pick-up arm 34 can grab the pipe plug through the pick-up notch 35 and move the plug to the side of the base 1, facilitating collection of the forged wire.

[0080] Reference Figure 2 、 Figure 4 、 Figure 6 and Figure 7In order to achieve automatic loading, a loading structure is provided. The loading structure includes two bases 10 fixed to the top of the base 1, and a common rotating shaft 11 is rotatably passed through the two bases 10. Two rotating arms 12 are fixedly sleeved on the outer wall of the rotating shaft 11. Two torsion springs 13 are sleeved on the outer wall of the rotating shaft 11. The two torsion springs 13 are fixedly connected to the two rotating arms 12 at one end close to each other, and the other ends are fixedly connected to the two bases 10. In this way, when the rotating shaft 11 rotates, the torsion springs 13 generate torque, so that the rotating arms 12 can return to their initial positions when no external force is applied. One end of the rotating shaft 11 rotates through one of the bases 10 and is fixed with a first gear 14. A first rack 15 is slidably passed through the top plate 2 and is meshed with the first gear 14. In this way, when the first rack 15 moves, it can drive the first gear 14 and the rotating shaft 11 to rotate. An L-shaped plate 16 is fixedly mounted on the outer wall of the first rack 15. A plurality of slide bars 17 are fixed to the top of the L-shaped plate 16, and the top ends of the plurality of slide bars 17 slide through the top plate 2. A plurality of first springs 18 (wire diameter φ4mm, center diameter φ25mm, material 60Si2MnA) are fixed between the bottom of the top plate 2 and the top of the L-shaped plate 16, and the plurality of first springs 18 are respectively mounted on the outer walls of the corresponding slide bars 17. In this way, when the L-shaped plate 16 moves up and down, the first springs 18 are compressed or restored, thereby acting as a buffer. A push block 19 is fixed to the side of the second guide rod 8 close to the L-shaped plate 16, and the push block 19 is used to push the first rack 15 upward through the L-shaped plate 16.

[0081] Specifically, after the mold base 5 moves upward to complete the unloading of the pipe plug wire, it will continue to move upward. At this time, the trapezoidal plate 42 continues to squeeze the trapezoidal block 39. At the same time, the mold base 5 drives the L-shaped plate 16 and the first rack 15 upward through the push block 19, compressing the first spring 18. The first rack 15 cooperates with the first gear 14 to drive the rotating shaft 11 and the rotating arm 12 to rotate, transporting the rough blank clamped by the clamping plate 25 to the top of the lower mold 3. Then, the annular electromagnet 22 is energized, generating a magnetic attraction force on the first magnet block 26, pulling the clamping plate 25 to one side, thereby releasing the clamping plate 25 from clamping the rough blank. This completes the automatic loading operation.

[0082] Reference Figure 6 and Figure 8To clamp the rough blank, each of the two rotating arms 12 is equipped with a clamping structure. This structure includes a rotating shaft 21, made of H62 brass, that rotates through the rotating arm 12. An annular electromagnet 22 is fixedly mounted at one end of the shaft 21. This annular electromagnet 22 generates a magnetic field to control the movement of the clamping plate. A sleeve 23 is slidably mounted on the outer wall of the shaft 21. A clamping plate 25 is fixedly connected to one end of the sleeve 23 to clamp the rough blank. A first magnet 26 is fixedly mounted on the side of the clamping plate 25 near the shaft 21. This first magnet 26 generates a magnetic attraction with the annular electromagnet 22, thereby controlling the movement of the clamping plate. The sleeve 23 is lined with a PTFE wear-resistant coating. The annular electromagnet 22 uses an N35 neodymium iron boron core, with 500±10 turns and an operating voltage of 24 VDC. The first magnet 26 is a sintered samarium cobalt magnet with a nickel-plated surface. In order to maintain the position of the clamping plate 25 when it is not subject to magnetic attraction, a second spring 24 is fixed between the rotating shaft 21 and the first magnet block 26. This spring is used to push the clamping plate 25 to move, so that the two clamping plates 25 can clamp the rough blank under the action of the second spring 24.

[0083] Specifically, when the annular electromagnet 22 is energized, it attracts the first magnet 26, causing the clamping plate 25 to move toward the rotating shaft 21, thereby releasing the rough blank. When the annular electromagnet 22 is de-energized, the magnetic attraction disappears, and the elastic force of the second spring 24 pushes the clamping plate 25 back to its original position, clamping the rough blank.

[0084] Reference Figure 2 and Figure 3 The base 1 has a circular cavity 29 within which multiple vertical rods 31 are fixed. A common connecting plate 30 is slidably mounted on the outer walls of these vertical rods 31. Multiple third springs 32 (with a maximum load of 2000N) are secured between the bottom of the connecting plate 30 and the inner wall of the bottom of the circular cavity 29. These springs are respectively mounted on the outer walls of their respective vertical rods 31. These third springs 32 drive the connecting plate 30 upward. A connecting rod 28 is secured to the top of the connecting plate 30. The top end of this connecting rod 28 extends into the lower mold 3 and is secured to a supporting plate 27. This supporting plate 27 is used to support the rough blank.

[0085] Specifically, during the forging process, the supporting plate 27 will descend together with the rough blank. When the forging is completed, the piston rod of the hydraulic cylinder 4 drives the die seat 5 and the upper die 6 to move up and reset. At this time, the elastic force of the third spring 32 will drive the supporting plate 27 to move up, so that the forged pipe plug wire will move up and reset, making it easier for the later material removal arm 34 to remove the pipe plug wire from the lower die 3.

[0086] Reference Figure 8A frosted layer is fixed to the side of the clamping plate 25 away from the sleeve 23. This layer increases the friction between the clamping plate 25 and the rough blank, preventing it from slipping during the forging process. Furthermore, the magnetic attraction between the annular electromagnet 22 and the first magnet 26 is designed to be greater than the elastic force of the second spring 24, ensuring that the annular electromagnet 22 can effectively control the movement of the clamping plate 25.

[0087] Reference Figure 6 , the lower mold 3 is provided with two make way grooves 20 on one side close to the rotating arm 12. The main function of these two make way grooves 20 is to provide necessary space for the rotating arm 12 to avoid interference when the rotating arm 12 rotates, thereby ensuring that the rotating arm 12 can rotate smoothly.

[0088] Reference Figure 4 The mold also includes a pusher block 19, whose top height is lower than the top height of the trapezoidal plate 42. This design ensures that the pusher block 19 has the opportunity to cooperate with the L-shaped plate 16 to load the material only after the trapezoidal plate 42 and the trapezoidal block 39 complete the material removal operation. This design sequence ensures the stability and accuracy of the mold during operation.

[0089] Example 2: Reference Figures 9-11 Another embodiment of the clamping structure includes a rotating shaft 21 that rotates through a rotating arm 12. A sleeve 23 is slidably mounted on the outer wall of the rotating shaft 21. A clamping plate 25 is fixedly connected to one end of the sleeve 23 for clamping the rough blank. A second spring 24 is fixed between the rotating shaft 21 and the clamping plate 25. This spring pushes the clamping plate 25, enabling the two clamping plates 25 to clamp the rough blank. Sliding grooves 43 are provided on the sides of the two rotating arms 12 that face away from each other. An iron slider 44 is slidably connected within each sliding groove 43. Furthermore, pull ropes 45 are fixed to the sides of the two clamping plates 25 that face away from each other. The other ends of these pull ropes 45 pass through the corresponding rotating shaft 21 and are fixedly connected to the iron slider 44. This allows the iron slider 44 to pull the clamping plate 25 via the pull ropes 45. Two base plates 46 are fixed to the side of the lower mold 3 near the clearance groove 20, one on each side of the two rotating arms 12. Second magnets 47 are fixed to the adjacent sides of the two base plates 46. These second magnets 47 generate magnetic attraction with the iron slider 44. This design allows the second magnets 47 to exert magnetic attraction on the iron slider 44 when the pivoting arm 12 rotates into the clearance slot 20. This pull cord 45 pulls the clamping plate 25 outward, releasing the clamped rough stock. The iron slider 44 is made of electrical pure iron DT4C with a phosphated surface. The breaking force of the pull cord 45 is ≥2kN. The base plates 46 are made of aluminum alloy 6061, and the second magnets 47 are made of N42UH neodymium iron boron.

[0090] refer to Figure 10 and Figure 11 The two clamps 25 are designed with inclined surfaces 48 on the side close to each other. These inclined surfaces 48 cooperate with the top of the rough blank, so that when the conveyor 9 conveys the rough blank between the two rotating arms 12, as the rotating arms 12 rotate in the opposite direction under the action of the torsion spring 13 and the first spring 18, the clamps 25 will cooperate with the rough blank under the action of the inclined surfaces 48 to clamp the rough blank.

[0091] When the conveyor 9 delivers the rough blank to the space between the two rotating arms 12, it stops. The rotating arms 12 then rotate in the opposite direction under the action of the torsion spring 13 and the first spring 18. Simultaneously, the clamping plates 25, acting on the inclined surfaces 48, engage the rough blank to clamp it. This ensures that the rough blank is stably held between the two rotating arms 12.

[0092] This design avoids the need to clamp the rough blank by energizing and de-energizing the annular electromagnet 22 in Example 1, thereby saving energy consumption and improving the energy efficiency of the mold. Furthermore, this design improves the stability and accuracy of the mold, ensuring the production quality of high-hardness pipe plugs.

[0093] A die forging process for producing a high-hardness pipe plugging wire die comprises the following steps:

[0094] S1: The piston rod of the hydraulic cylinder 4 pushes the die holder 5 and the upper die 6 downward to forge the rough blank placed on the lower die 3. During the forging process, the rough blank pushes the carrier plate 27 and the connecting plate 30 downward, and the third spring 32 is compressed. When the forging is completed, the piston rod of the hydraulic cylinder 4 drives the die holder 5 and the upper die 6 upward and reset. The third spring 32 drives the carrier plate 27 upward, so that the forged pipe plug moves upward and resets.

[0095] When the die seat 5 moves up, the first guide rod 7 and the trapezoidal plate 42 move up, and the trapezoidal plate 42 cooperates with the trapezoidal block 39 to drive the second rack 38 to move outward, and the second rack 38 drives the one-way bearing 36 to rotate through the second gear 37. The one-way bearing 36 is now in a locked state with the rotating rod 33, and the rotating rod 33 drives the material picking arm 34 to rotate 180 degrees, and during the rotation process, it can just pass through the material picking notch 35 to complete the grabbing of the pipe plug, and with the rotation of the material picking arm 34, the pipe plug can be moved to one side of the base 1, which is convenient for collecting the forged pipe plug. The unloading of the pipe plug can be automatically completed by the rising of the die seat 5. When the die seat 5 moves down for forging in the later stage, the second rack 38 is reset under the action of the fourth spring 41, and the second rack 38 drives the one-way bearing 36 to rotate through the second gear 37. The one-way bearing 36 is in a rotating state with the rotating rod 33 at this time;

[0096] S3. After the mold base 5 moves up to complete the blanking of the pipe plug, it continues to move up. The trapezoidal plate 42 continues to squeeze the trapezoidal block 39, and the mold base 5 drives the L-shaped plate 16 and the first rack 15 to move up through the push block 19. The first spring 18 is compressed. The first rack 15 cooperates with the first gear 14 to drive the rotating shaft 11 and the rotating arm 12 to rotate, and the rough blank clamped by the clamping plate 25 is transported to the top of the lower mold 3. Then the annular electromagnet 22 is energized, and the annular electromagnet 22 presses the first magnet block 2 The magnetic attraction of 6 pulls the clamping plate 25 to one side, releasing the clamping plate 25 from the rough blank, thereby completing the automatic loading operation; when the die base 5 moves down to forge again, the rotating arm 12 resets and rotates under the action of the first spring 18 and the torsion spring 13, and during the reset process, the rough blank conveyed by the conveyor 9 just moves between the two rotating arms 12 again. By disconnecting the power of the annular electromagnet 22, the two clamping plates 25 can clamp the rough blank under the action of the second spring 24, which is convenient for subsequent loading;

[0097] Another embodiment of the clamping structure: when the conveyor 9 conveys the rough blank to between the two rotating arms 12, the conveyor 9 stops running, and the rotating arm 12 rotates in the opposite direction under the action of the torsion spring 13 and the first spring 18. The clamping plate 25 cooperates with the rough blank under the action of the inclined surface 48 to clamp the rough blank. When the rotating arm 12 rotates again to load the material later, the rotating arm 12 rotates into the give way groove 20, and the second magnet block 47 generates a magnetic attraction force on the iron slider 44. The clamping plate 25 is pulled outward by the pull rope 45, so that the rough blank can be placed on the carrying plate 27, avoiding the clamping of the rough blank by the power on and off of the annular electromagnet 22, thereby saving energy consumption.

[0098] However, as is well known to those skilled in the art, the working principles and wiring methods of the hydraulic cylinder 4, conveyor 9 and annular electromagnet 22 are commonplace, and are conventional means or common knowledge, so they will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0099] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A mold for making high-hardness pipe plugging wire, characterized in that: include: A base (1) having a top plate (2) fixed on top thereof via support columns; A hydraulic cylinder (4) is fixedly provided through the top plate (2), and its piston rod is connected to the mold base (5); The upper die (6) is fixed to the bottom of the die base (5) and forms a forging cavity with the lower die (3) on the top of the base (1); A first guide rod (7) and a second guide rod (8) are vertically fixed to both sides of the top of the mold base (5) and slide through the top plate (2); A conveyor (9) is provided on one side of the base (1) and is used for conveying rough embryos; Two rotating arms (12) are rotatably mounted on the top of the base (1) via a rotating shaft (11) and are used to transfer the rough blank to the lower mold (3); A material taking arm (34) is arranged on a side of the top of the base (1) away from the rotating arm (12); The material unloading structure includes a trapezoidal plate (42) linked to the first guide rod (7), a second rack (38) slidably connected to the top plate (2), and a one-way bearing (36) drivingly connected to the material unloading arm (34), and is used to drive the material unloading arm (34) to rotate in one direction to complete the unloading; A feeding structure comprising a pushing block (19) linked to the second guide rod (8), a first rack (15) slidably connected to the top plate (2), and a torsion spring (13) transmission-connected to the rotating arm (12), for driving the rotating arm (12) to reset and clamp the rough blank; The feeding structure further comprises: A base (10) is fixed to the top of the base (1), and both ends of the rotating shaft (11) are rotatably connected to the base (10); A first gear (14) is fixed to one end of the rotating shaft (11) and meshes with the first rack (15); An L-shaped plate (16) is fixed to the outer wall of the first rack (15) and elastically connected to the top plate (2) via a plurality of first springs (18); The pushing block (19) pushes the L-shaped plate (16) as the second guide rod (8) moves upward, driving the first rack (15) to move upward and driving the rotating shaft (11) to rotate, so that the rotating arm (12) swings toward the forging station; A clamping structure is provided in the rotating arm (12), comprising: Sliding grooves (43) are provided on both sides of the rotating arm (12), and the iron sliders (44) are slidably connected therein; A rotating shaft (21) is rotatably connected to and extends through the rotating arm (12); A sleeve (23) is slidably mounted on the outer wall of the rotating shaft (21), one end of which is connected to the clamping plate (25); A second spring (24), with two ends respectively connected to the rotating shaft (21) and the clamping plate (25), is used to push the clamping plate (25) to reset and clamp the rough blank; A pull rope (45), one end of which is connected to the splint (25), and the other end of which passes through the rotating shaft (21) and is connected to the iron slider (44); A base plate (46) is fixed to one side of the lower mold (3), and a second magnet block (47) is fixed on the inner side of the base plate; When the rotating arm (12) rotates to the clearance groove (20), the second magnet block (47) attracts the iron slider (44) to pull down the pull rope (45), forcing the clamping plate (25) to release the rough blank; the contact surface of the clamping plate (25) is provided with an inclined surface (48), which cooperates with the wedge shape of the top of the rough blank to achieve self-locking clamping.

2. A mold for making high-hardness pipe plugging wire according to claim 1, characterized in that: The blanking structure also includes: A rotating rod (33) is rotatably mounted between the base (1) and the top plate (2); A one-way bearing (36), the inner ring of which is fixedly sleeved on the outer wall of the rotating rod (33), and the outer ring of which is fixedly connected to the second gear (37); A trapezoidal block (39) is fixedly connected to the second rack (38) and elastically connected to the top plate (2) via a fourth spring (41); The trapezoidal plate (42) squeezes the trapezoidal block (39) as the first guide rod (7) moves upward, driving the second rack (38) to move laterally, so that the second gear (37) drives the rotating rod (33) and the material taking arm (34) to rotate 180 degrees through the one-way bearing (36).

3. A mold for making high-hardness pipe plugging wire according to claim 2, characterized in that: The feeding arm (34) is provided with a feeding notch (35), in which a polyurethane wear-resistant layer with a hardness of 90 Shore A is embedded; a limiting rod (40) is provided between the rotating rod (33) and the top plate (2), and the limiting rod (40) slides through the trapezoidal block (39) and is sleeved with a fourth spring (41).

4. A mold for making high-hardness pipe plugging wire according to claim 3, characterized in that: The base (1) is provided with: A circular cavity (29) in which a plurality of vertical rods (31) are fixed; A connecting plate (30) is slidably sleeved on the outer wall of the vertical rod (31) and elastically connected to the bottom of the circular cavity (29) via a third spring (32); A connecting rod (28), one end of which fixes the connecting plate (30) and the other end of which extends into the lower mold (3) and fixes the carrier plate (27); During forging, the carrier plate (27) is pressed and moves downward, and after forging is completed, the third spring (32) drives the carrier plate (27) to move upward and reset.

5. The mold for making high-hardness pipe plugging wire according to claim 4, characterized in that: The lower mold (3) is provided with a clearance groove (20) on both sides for avoiding the rotation track of the rotating arm (12); the top height of the pushing block (19) is lower than the top height of the trapezoidal plate (42), so that the loading structure is triggered only after the unloading action is completed.

6. A die forging process using the die for making a high-hardness pipe plug wire according to claim 5, characterized in that: The following steps are involved: S1: The hydraulic cylinder (4) drives forging and resetting: The piston rod of the hydraulic cylinder (4) pushes the die seat (5) and the upper die (6) downward to forge the rough blank. During forging, the rough blank presses down the bearing plate (27) and the connecting plate (30), and the third spring (32) compresses and stores energy. After the forging is completed, the piston rod drives the die to move upward and reset, and the third spring (32) releases the elastic force to push the bearing plate (27) and the forming pipe plug upward and reset; S2: Trapezoidal plate (42) linkage unloading mechanism: When the mold base (5) moves upward, the trapezoidal plate (42) is driven upward by the first guide rod (7), and the trapezoidal plate (42) cooperates with the trapezoidal block (39) to push the second rack (38) outward; the second rack (38) drives the one-way bearing (36) through the second gear (37) to lock the rotating rod (33), driving the material picking arm (34) to rotate 180 degrees to grab the pipe plug to the side of the base (1); when the mold moves downward, the fourth spring (41) resets the second rack (38), and the one-way bearing (36) switches to a free rotation state; S3: Rack and pinion driven automatic loading: When the mold base (5) continues to move upward, the push block (19) drives the L-shaped plate (16) and the first rack (15) to move upward to compress the first spring (18), and the first rack (15) drives the rotating shaft (11) and the rotating arm (12) to rotate through the first gear (14), and transports the rough blank clamped by the clamp (25); the annular electromagnet (22) electromagnetically attracts the first magnet block (26) to release the clamping of the clamp, and the loading is completed; when the mold moves downward, the rotating arm (12) is reset under the action of the spring and the torsion spring (13), and cooperates with the conveyor (9) to transport the new rough blank to the clamping position. After the electromagnet is powered off, the second spring (24) drives the clamp to clamp again.

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