A welding nut forming die and a process method thereof

Abstract

The present application belongs to the technical field of welding nut forming, and particularly relates to a welding nut forming die and a process method thereof, which comprises a supporting frame, a forming frame, a processing frame, a die type cold heading mechanism and an elliptical type conveying mechanism. The forming frame is arranged on the upper wall of the supporting frame. The processing frame is arranged on the end side wall of the supporting frame close to the forming frame. The die type cold heading mechanism is arranged on the end away from the supporting frame of the processing frame. The elliptical type conveying mechanism is arranged on the die type cold heading mechanism. The die type cold heading mechanism comprises an upper die assembly, a lower die assembly, a material supporting assembly and a testing assembly. The present application provides a welding nut forming die and a process method thereof, which can perform one-time forming on the welding nut in multiple processes, can control the forming length of the blank, and can guarantee the size specification of the formed welding nut.

Description

Technical Field

[0001] This invention belongs to the field of welding nut forming technology, specifically referring to a welding nut forming mold and its process method. Background Technology

[0002] In the automotive welding nut manufacturing industry, cold heading has become a mainstream processing technology due to its significant advantages. This process achieves near-net-shape forming through plastic deformation of metal blanks at room temperature. It not only has the characteristics of efficient continuous production, but also improves material utilization due to its non-cutting characteristics. In addition, the fibrous streamline structure formed inside the cold-headed parts processed by this process can significantly enhance the tensile strength and fatigue life of the nuts. Therefore, it is particularly suitable for the stringent requirements of the automotive industry for high-strength connectors and has become a key manufacturing technology to ensure the safety of the vehicle body structure.

[0003] The existing welding nut forming molds currently have the following problems:

[0004] Existing welding nut forming molds lack the ability to perform multi-process one-time forming of welding nuts, which prolongs the production cycle and reduces the forming efficiency of welding nuts; in addition, traditional welding nut forming molds also lack the ability to control the forming length of the blank, resulting in the size specifications of the formed welding nuts failing to meet the requirements.

[0005] Therefore, it cannot meet the existing requirements for the use of welding nut forming molds. Summary of the Invention

[0006] In view of the above situation and to overcome the defects of the prior art, this solution provides a welding nut forming mold and its process method that can perform multi-process one-time forming of welding nuts and can control the forming length of the blank to ensure the size and specifications of the welding nut after forming.

[0007] The technical solution adopted in this solution is as follows: This solution proposes a welding nut forming mold, including a support frame, a forming frame, a processing frame, a molding cold heading mechanism, and an elliptical transport mechanism. The forming frame is located on the upper wall of the support frame, the processing frame is located on the side wall of the support frame near the forming frame, the molding cold heading mechanism is located at the end of the processing frame away from the support frame, and the elliptical transport mechanism is located on the molding cold heading mechanism. The molding cold heading mechanism includes an upper mold assembly, a lower mold assembly, a material support assembly, and a testing assembly. The upper mold assembly is located at the end of the forming frame away from the support frame, the lower mold assembly is located at the end of the processing frame away from the support frame, the material support assembly is located inside the lower mold assembly, and the testing assembly is located on the bottom wall of the support frame. The elliptical transport mechanism includes an elliptical support assembly, a conveying assembly, a driving assembly, and a feeding assembly. The elliptical support assembly is located on the lower mold assembly, the conveying assembly is located outside the elliptical support assembly, the driving assembly is located on the elliptical support assembly, and the feeding assembly is located on the elliptical support assembly.

[0008] As a further preferred embodiment of the present invention, the upper mold assembly includes a hydraulic cylinder and an upper mold, wherein the hydraulic cylinder is located at the end of the forming frame away from the support frame, and the upper mold is located at the power end of the hydraulic cylinder; the lower mold assembly includes a guide cylinder and a lower mold, wherein the guide cylinder is located at the end of the processing frame away from the support frame and is a through-type structure, and the lower mold is located on the inner wall of the top of the guide cylinder; the material support assembly includes a magnetic ring block, a limiting ring block, a material support rod, a measuring block, and a return spring, wherein the magnetic ring block is slidably disposed on the inner wall of the guide cylinder, and the limiting ring blocks are symmetrically disposed above and below the magnetic ring block. The inner wall of the guide cylinder has a measuring block located below a limiting ring block below a magnetic ring block. A reset spring is located between the measuring block and the magnetic ring block. The material support rod passes through the lower mold, the magnetic ring block, and the limiting ring block sequentially. The measuring block is located inside the reset spring. The testing assembly includes a testing column, a groove, a proximity switch, and a testing electromagnet. The testing column is located on the bottom wall of the support frame and is vertically coaxial with the guide cylinder. The groove is located on the upper wall of the testing column and has an opening at the top. The proximity switch is located inside the groove, and the testing electromagnet is located on the top side wall of the testing column.

[0009] Preferably, the elliptical support assembly includes a material support plate and an elliptical frame. The material support plate is symmetrically arranged on the top and bottom side walls of the guide cylinder, with the upper and bottom walls of the material support plate flush with the upper and bottom walls of the guide cylinder, respectively. The elliptical frame is symmetrically arranged on both sides of the material support plate. The conveying assembly includes a toothed conveyor belt and rubber sleeves. The toothed conveyor belt is rotatably disposed between the elliptical frames, with its inner wall slidingly fitted against the side wall of the material support plate. Multiple sets of rubber sleeves are disposed through the side wall of the toothed conveyor belt. The driving assembly includes a motor frame, a drive motor, and a drive gear. The motor frame is symmetrically arranged between the material support plate and the elliptical frame. The drive motor... The drive gear is located at the end of the motor frame away from the material support plate, and meshes with the transmission belt. The feeding assembly includes a pushing electromagnet, a carrying magnetic plate, a feeding cylinder, a feeding trough, and a discharging cylinder. The feeding cylinder is disposed through one end of the material support plate and is a through-type structure. The pushing electromagnet is located on the bottom inner wall of the feeding cylinder. The carrying magnetic plate is slidably disposed on the inner wall of the feeding cylinder above the pushing electromagnet. The feeding trough is located on the top side wall of the feeding cylinder and is a through-type structure. The discharging cylinder is disposed through the end of the material support plate away from the feeding cylinder and is a through-type structure.

[0010] A process method for forming a welding nut mold, comprising the following steps:

[0011] Step 1: The cut cylindrical blank is placed through the feeding chute onto the upper wall of the loading magnetic plate inside the feeding cylinder. Initially, the rubber sleeve and guide cylinder are coaxially and vertically positioned. The pushing electromagnet is energized and generates magnetism. The pushing electromagnet and the loading magnetic plate are set with the same poles. The pushing electromagnet is fixed to the bottom inner wall of the feeding cylinder and pushes the loading magnetic plate through repulsion. The loading magnetic plate slides up along the feeding cylinder, raising the bottom wall of the cylindrical blank to a position flush with the bottom wall of the rubber sleeve. The drive motor drives the drive gear to rotate. The drive gear meshes with the transmission toothed belt, which drives the transmission toothed belt to rotate along the elliptical frame. The transmission toothed belt moves the cylindrical blank towards station one through the rubber sleeve. Under the drive of the transmission toothed belt, the cylindrical blank slides along the upper wall of the support plate into the first set of guide cylinders and fits against the upper wall of the support rod. The hydraulic cylinder power end is in the shortened state, and the distance between the upper mold and the lower mold assembly is at its maximum. At this time, the testing electromagnet is energized and generates magnetism. The electromagnet and magnetic ring are set with the same pole. The electromagnet is fixed to the top side wall of the test column and pushes the magnetic ring with repulsive force. The magnetic ring moves the cylindrical blank to the top position of the rubber sleeve through the material support rod. The magnetic ring fits against the bottom wall of the limiting ring above it. The power end of the hydraulic cylinder extends and drives the upper mold to descend. The cylindrical blank enters the upper mold and the upper mold continues to press down on the cylindrical blank. The cylindrical blank uses the deformation characteristics of the return spring to press down the material support rod and the magnetic ring into the guide cylinder. The magnetic ring stops moving downward under the obstruction of the limiting ring below it. The material support rod continues to descend and drives the measuring block to fit against the upper wall of the test column. The upper mold and the lower mold squeeze the cylindrical blank. The proximity switch senses the measuring block and the power end of the hydraulic cylinder stops extending. The cylindrical blank is squeezed by the upper mold and the lower mold of the first station to form the top and bottom rounded corners, completing the cold heading operation of the cylindrical blank in one station.

[0012] Step Two: After the cylindrical blank is processed in the first step, the hydraulic cylinder shortens, causing the upper mold to rise away from the cylindrical blank. The return spring deforms and rebounds, pushing the cylindrical blank out of the guide cylinder through the material support rod until it is flush with its upper wall. Simultaneously, the pusher electromagnet inside the loading cylinder is energized and generates magnetism, using repulsive force to push the loading magnetic plate upward. The loading magnetic plate pushes the second set of cylindrical blanks to a position flush with the loading cylinder. The drive motor drives the drive gear to rotate through the power end. The drive gear drives the transmission belt to rotate around the elliptical frame. The transmission belt, through the rubber sleeve, carries the cylindrical blanks processed in the first step. The material moves to the second process, and the newly added cylindrical blank enters the first process. The pre-formed cylindrical blank slides along the upper wall of the support plate into station two. The newly added cylindrical blank and the pre-formed cylindrical blank are respectively attached to the upper wall of the support rod. After the test electromagnet is energized, it uses repulsive force to push the magnetic ring block. The magnetic ring block slides up along the inner wall of the guide cylinder and attaches to the bottom wall of the limiting ring block above it. The magnetic ring block drives the support rod through the reset spring to push the cylindrical blank to the top inner wall of the rubber sleeve. The two sets of hydraulic cylinders start at the same time to drive the upper mold to process the new cylindrical blank and the pre-formed cylindrical blank synchronously.

[0013] Step 3: Following the above operations, after the preliminary cylindrical blank undergoes secondary extrusion molding through the upper and lower molds, the upper and lower parts of the cylindrical blank will form upper and lower holes. After the newly formed cylindrical blank undergoes extrusion molding through the upper and lower molds, the top and bottom will form rounded corners.

[0014] Step 4: Following the above operations, move the cylindrical blank formed by the second cold heading to the third process, and move the initially formed cylindrical blank to the second process.

[0015] Step 5: Following the above operations, the upper and lower holes of the secondary cold-headed cylindrical blank are formed to perform piercing operations, and the preliminarily formed cylindrical blank is pressed to perform piercing operations. At the same time, a new set of cylindrical blanks enters station one for preliminary forming processing.

[0016] Step Six: Following the above operation, the cylindrical blank, which has undergone three cold heading processes, enters the upper part of the feeding cylinder under the drive of the conveyor belt. The cylindrical blank slides down along the feeding cylinder, completing the multi-process forming operation of the cylindrical blank.

[0017] Specifically, the support frame is equipped with a controller on its side wall.

[0018] The controller is electrically connected to the hydraulic cylinder, proximity switch, test electromagnet and drive motor respectively.

[0019] The beneficial effects achieved by this solution using the above structure are as follows:

[0020] Compared with existing technologies, this solution combines a molding-type cold heading mechanism with an elliptical transport mechanism. Through the setting of upper mold assembly, lower mold assembly, material support assembly, testing assembly, elliptical support assembly, conveying assembly, driving assembly and feeding assembly, when manufacturing circular double-ended welded nut blanks, the elliptical rotational force can be used to process the cylindrical blanks in multiple processes, realizing one-time forming of the cylindrical blanks, avoiding secondary processing, improving material utilization, shortening the production cycle of circular double-ended welded nuts, and greatly improving the cold heading forming efficiency of circular double-ended welded nut blanks;

[0021] Furthermore, by pre-pushing the cylindrical blank with the material support rod, the cutting length of the cylindrical blank can be monitored. When the length of the cylindrical blank is short, after the power end of the hydraulic cylinder extends to the preset distance, the cylindrical blank cannot be driven by the material support rod to bring the measuring block into contact with the test column. As a result, the proximity switch cannot sense the measuring block and remind the operator that the cylindrical blank does not meet the specified specifications. When the length of the cylindrical blank is long, the power end of the hydraulic cylinder cannot extend to the preset distance, so the proximity switch senses the measuring block and reminds the operator that the cylindrical blank exceeds the specified specifications. This ensures the dimensions of the formed circular double-headed welded nut. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this solution;

[0023] Figure 2 This is the front perspective stereoscopic view of this solution;

[0024] Figure 3 This is a bottom-view perspective of the design.

[0025] Figure 4 This is a schematic diagram of the molding cold heading mechanism in this scheme;

[0026] Figure 5 This is a schematic diagram of the combined structure of the elliptical support component and the drive component in this scheme;

[0027] Figure 6 This is the main view of this solution;

[0028] Figure 7 This is a side view of the design.

[0029] Figure 8 This is a top view of the plan;

[0030] Figure 9 for Figure 6 Sectional view of AA section;

[0031] Figure 10 for Figure 8 Sectional view of BB section;

[0032] Figure 11 for Figure 9 Enlarged structural view of section I;

[0033] Figure 12 for Figure 10 Enlarged structural view of Part II;

[0034] Figure 13 for Figure 4 Enlarged structural view of Part III.

[0035] The components include: 1. Support frame; 2. Forming frame; 3. Processing frame; 4. Molding cold heading mechanism; 5. Upper mold assembly; 6. Hydraulic cylinder; 7. Upper mold; 8. Lower mold assembly; 9. Guide cylinder; 10. Lower mold; 11. Material support assembly; 12. Magnetic ring block; 13. Limiting ring block; 14. Material support rod; 15. Positioning block; 16. Return spring; 17. Test assembly; 18. Test column; 19. Groove; 20. Proximity switch; 21. 1. Test electromagnet, 22. Elliptical transport mechanism, 23. Elliptical support assembly, 24. Material support plate, 25. Elliptical frame, 26. Conveying assembly, 27. Transmission toothed belt, 28. Rubber sleeve, 29. Drive assembly, 30. Motor frame, 31. Drive motor, 32. Drive gear, 33. Feeding assembly, 34. Pushing electromagnet, 35. Carrying magnetic plate, 36. Feeding cylinder, 37. Feeding trough, 38. Unloading cylinder, 39. Controller.

[0036] The accompanying drawings are provided to further understand the present solution and form part of the specification. They are used together with the embodiments of the present solution to explain the present solution and do not constitute a limitation thereof. Detailed Implementation

[0037] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this solution, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this solution without creative effort are within the scope of protection of this solution.

[0038] In the description of this solution, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this solution.

[0039] like Figures 1-13As shown, the proposed solution provides a welding nut forming mold, comprising a support frame 1, a forming frame 2, a processing frame 3, a molding-type cold heading mechanism 4, and an elliptical transport mechanism 22. The forming frame 2 is located on the upper wall of the support frame 1, the processing frame 3 is located on the side wall of the support frame 1 near the forming frame 2, the molding-type cold heading mechanism 4 is located at the end of the processing frame 3 away from the support frame 1, and the elliptical transport mechanism 22 is mounted on the molding-type cold heading mechanism 4. The molding-type cold heading mechanism 4 includes an upper mold assembly 5, a lower mold assembly 8, a material support assembly 11, and a testing assembly 17. The upper mold assembly... The lower mold assembly 8 is located at the end of the forming frame 2 away from the support frame 1. The material support assembly 11 is located inside the lower mold assembly 8. The test assembly 17 is located on the bottom wall of the support frame 1. The elliptical transport mechanism 22 includes an elliptical support assembly 23, a conveying assembly 26, a driving assembly 29, and a loading assembly 33. The elliptical support assembly 23 is located on the lower mold assembly 8. The conveying assembly 26 is located outside the elliptical support assembly 23. The driving assembly 29 is located on the elliptical support assembly 23. The loading assembly 33 is located on the elliptical support assembly 23.

[0040] The upper mold assembly 5 includes a hydraulic cylinder 6 and an upper mold 7. The hydraulic cylinder 6 is located at the end of the forming frame 2 away from the support frame 1, and the upper mold 7 is located at the power end of the hydraulic cylinder 6. The lower mold assembly 8 includes a guide cylinder 9 and a lower mold 10. The guide cylinder 9 is located at the end of the processing frame 3 away from the support frame 1 and is through-type. The lower mold 10 is located on the inner wall of the top of the guide cylinder 9. The material support assembly 11 includes a magnetic ring block 12, a limiting ring block 13, a material support rod 14, a measuring block 15, and a return spring 16. The magnetic ring block 12 is slidably disposed on the inner wall of the guide cylinder 9. The limiting ring block 13 is symmetrically disposed on the inner wall of the guide cylinder 9 above and below the magnetic ring block 12. The measuring block 15 is located on the inner wall of the guide cylinder 9. Below the limiting ring block 13 below the magnetic ring block 12, the reset spring 16 is located between the measuring block 15 and the magnetic ring block 12. The material support rod 14 passes through the lower mold 10, the magnetic ring block 12 and the limiting ring block 13 in sequence and is located on the upper wall of the measuring block 15 inside the reset spring 16. The test assembly 17 includes a test column 18, a groove 19, a proximity switch 20 and a test electromagnet 21. The test column 18 is located on the bottom wall of the support frame 1 and is vertically arranged coaxially with the guide cylinder 9. The groove 19 is located on the upper wall of the test column 18 and is open at the top. The proximity switch 20 is located inside the groove 19 and the test electromagnet 21 is located on the top side wall of the test column 18.

[0041] The elliptical support assembly 23 includes a material support plate 24 and an elliptical frame 25. The material support plate 24 is symmetrically arranged on the top and bottom side walls of the guide cylinder 9, and its upper and bottom walls are flush with the upper and bottom walls of the guide cylinder 9, respectively. The elliptical frame 25 is symmetrically arranged on both sides of the material support plate 24. The conveying assembly 26 includes a toothed conveyor belt 27 and rubber sleeves 28. The toothed conveyor belt 27 is rotatably disposed between the elliptical frames 25, and its inner wall slides against the side wall of the material support plate 24. Multiple sets of rubber sleeves 28 are disposed through the side wall of the toothed conveyor belt 27. The driving assembly 29 includes a motor frame 30, a drive motor 31, and a drive gear 32. The motor frame 30 is symmetrically arranged between the material support plate 24 and the elliptical frame 25, and the drive motor 31 is disposed between the motor frame 24 and the elliptical frame 25. At the end of the frame 30 away from the material support plate 24, the drive gear 32 is located at the power end of the drive motor 31 and meshes with the transmission belt 27; the feeding assembly 33 includes a pushing electromagnet 34, a carrying magnetic plate 35, a feeding cylinder 36, a feeding trough 37, and a discharging cylinder 38. The feeding cylinder 36 is disposed through one end of the material support plate 24 and is through-connected. The pushing electromagnet 34 is located on the bottom inner wall of the feeding cylinder 36. The carrying magnetic plate 35 is slidably disposed on the inner wall of the feeding cylinder 36 above the pushing electromagnet 34. The feeding trough 37 is located on the top side wall of the feeding cylinder 36 and is through-connected. The discharging cylinder 38 is disposed through the end of the material support plate 24 away from the feeding cylinder 36 and is through-connected.

[0042] The support frame 1 is equipped with a controller 39 on its side wall.

[0043] The controller 39 is electrically connected to the hydraulic cylinder 6, the proximity switch 20, the test electromagnet 21, and the drive motor 31, respectively.

[0044] A process method for forming a welding nut mold, comprising the following steps:

[0045] Step 1: The cut cylindrical blank is placed through the feeding groove 37 onto the upper wall of the loading magnetic plate 35 inside the feeding cylinder 36. Initially, the rubber sleeve 28 and the guide cylinder 9 are coaxially and vertically arranged. The pushing electromagnet 34 is energized and generates magnetism. The pushing electromagnet 34 and the loading magnetic plate 35 are set with the same pole. The pushing electromagnet 34 is fixed to the bottom inner wall of the feeding cylinder 36 and pushes the loading magnetic plate 35 through repulsion. The loading magnetic plate 35 slides and rises along the feeding cylinder 36, raising the bottom wall of the cylindrical blank to a position flush with the bottom wall of the rubber sleeve 28. The driving electromagnet... The power end of machine 31 drives the drive gear 32 to rotate. The drive gear 32 meshes with the transmission toothed belt 27. The drive gear 32 drives the transmission toothed belt 27 to rotate along the elliptical frame 25. The transmission toothed belt 27 drives the cylindrical blank to move towards the first workstation through the rubber sleeve 28. Under the drive of the transmission toothed belt 27, the cylindrical blank slides along the upper wall of the support plate 24 and enters the upper part of the first set of guide cylinders 9, where it is in contact with the upper wall of the support rod 14. The power end of the hydraulic cylinder 6 is in the shortened state, and the distance between the upper mold 7 and the lower mold assembly 8 is at its longest. At this time, the test electromagnet 21 is energized. Magnetism is generated. The testing electromagnet 21 and the magnetic ring block 12 are set with the same poles. The testing electromagnet 21 is fixed to the top side wall of the testing column 18 and pushes the magnetic ring block 12 through repulsion. The magnetic ring block 12 drives the cylindrical blank to rise to the top position of the rubber sleeve 28 through the material support rod 14. The magnetic ring block 12 is in contact with the bottom wall of the limiting ring block 13 above it. The power end of the hydraulic cylinder 6 extends and drives the upper mold 7 to descend. The cylindrical blank enters the interior of the upper mold 7. The upper mold 7 continues to press down on the cylindrical blank. The cylindrical blank utilizes the deformation characteristics of the return spring 16. The downward support rod 14 and the magnetic ring block 12 enter the guide cylinder 9. The magnetic ring block 12 stops moving downward under the obstruction of the limiting ring block 13 below it. The support rod 14 continues to descend, causing the measuring block 15 to fit against the upper wall of the test column 18. The upper mold 7 and the lower mold 10 extrude the cylindrical blank. The proximity switch 20 senses the measuring block 15, and the power end of the hydraulic cylinder 6 stops extending. The cylindrical blank is extruded by the upper mold and the lower mold of the first station to form the top and bottom rounded corners, completing the cold heading operation of the cylindrical blank in one station.

[0046] Step Two: After the cylindrical blank is processed in the first process, the hydraulic cylinder 6 shortens, causing the upper mold 7 to rise away from the cylindrical blank. The return spring 16 deforms and rebounds, causing the cylindrical blank to extend out of the guide cylinder 9 through the material support rod 14 and become flush with its upper wall. At the same time, the pusher electromagnet 34 inside the loading cylinder 36 is energized and generates magnetism, using repulsive force to push the loading magnetic plate 35 upward. The loading magnetic plate 35 pushes the second set of cylindrical blanks to a position flush with the loading cylinder 36. The drive motor 31 drives the drive gear 32 to rotate through the power end. The drive gear 32 drives the transmission toothed belt 27 to rotate around the elliptical frame 25. The transmission toothed belt 27 drives the cylindrical blanks processed in the first process through the rubber sleeve 28. The cylindrical blank moves to the second process, and the newly placed cylindrical blank enters the first process. The pre-formed cylindrical blank slides along the upper wall of the support plate 24 into station two. The newly placed cylindrical blank and the pre-formed cylindrical blank are respectively attached to the upper wall of the support rod 14. After the test electromagnet 21 is energized, it uses repulsive force to push the magnetic ring block 12. The magnetic ring block 12 slides up along the inner wall of the guide cylinder 9 and is attached to the bottom wall of the limiting ring block 13 above it. The magnetic ring block 12 drives the support rod 14 through the reset spring 16 to push the cylindrical blank to the top inner wall of the rubber sleeve 28. The two sets of hydraulic cylinders 6 are started at the same time to drive the upper mold 7 to process the new cylindrical blank and the pre-formed cylindrical blank synchronously.

[0047] Step 3: Following the above operation, after the preliminary cylindrical blank is processed by the upper mold 7 and the lower mold 10 for secondary extrusion molding, the upper part and the bottom of the cylindrical blank form an upper hole and a bottom hole. After the newly formed cylindrical blank is processed by the upper mold 7 and the lower mold 10 for extrusion molding, the top and bottom form rounded corners.

[0048] Step 4: Following the above operations, move the cylindrical blank formed by the second cold heading to the third process, and move the initially formed cylindrical blank to the second process.

[0049] Step 5: Following the above operations, the upper and lower holes of the secondary cold-headed cylindrical blank are formed to perform piercing operations, and the preliminarily formed cylindrical blank is pressed to perform piercing operations. At the same time, a new set of cylindrical blanks enters station one for preliminary forming processing.

[0050] Step Six: Following the above operation, the cylindrical blank, which has undergone three cold heading processes, enters the upper part of the feeding cylinder 38 under the drive of the conveyor belt 27. The cylindrical blank slides down along the feeding cylinder 38, completing the multi-process forming operation of the cylindrical blank.

[0051] In actual use, in the initial state, the return spring 16 is in the shortened state, the material support rod 14 is flush with the upper wall of the guide cylinder 9 and the upper wall of the material support plate 24 respectively, the rubber sleeve 28 is coaxially and vertically set with the guide cylinder 9, the power end of the hydraulic cylinder 6 is in the shortened state, and the distance between the upper mold 7 and the lower mold assembly 8 is at its longest.

[0052] The cylindrical blank is cold-headed. The cut cylindrical blank is placed on the upper wall of the material-carrying magnetic plate 35 inside the feeding cylinder 36 through the feeding groove 37. The controller 39 controls the pusher electromagnet 34 to start. The pusher electromagnet 34 generates magnetism when energized. The pusher electromagnet 34 and the material-carrying magnetic plate 35 are set with the same pole. The pusher electromagnet 34 is fixed to the bottom inner wall of the feeding cylinder 36 and pushes the material-carrying magnetic plate 35 through repulsion. The material-carrying magnetic plate 35 slides and rises along the feeding cylinder 36, raising the bottom wall of the cylindrical blank to the rubber. At the position flush with the bottom wall of sleeve 28, controller 39 controls drive motor 31 to start. Drive motor 31 drives drive gear 32 to rotate. Drive gear 32 meshes with transmission belt 27. Drive gear 32 drives transmission belt 27 to rotate along elliptical frame 25. Transmission belt 27 drives cylindrical blank to move towards station 1 through rubber sleeve 28. Under the drive of transmission belt 27, cylindrical blank slides along the upper wall of support plate 24 into the upper part of first guide cylinder 9 and fits against the upper wall of support rod 14.

[0053] To prevent shorter cylindrical blanks from being mixed in and processed, affecting the overall processing quality and dimensions, when the power end of the hydraulic cylinder 6 extends to a certain length or the proximity switch 20 senses the position sensor block 15, the power end of the hydraulic cylinder 6 stops extending and performs a reverse shortening operation:

[0054] When the length of the cylindrical blank is short, after the power end of the hydraulic cylinder 6 extends to the preset distance, the cylindrical blank cannot drive the measuring block 15 to fit with the test column 18 through the material support rod 14, thus the proximity switch 20 cannot sense the measuring block 15 and remind the operator that the cylindrical blank has not met the specified specifications.

[0055] When the length of the cylindrical blank is too long, the power end of the hydraulic cylinder 6 cannot extend to the preset distance, so the proximity switch 20 senses the measuring block 15 and reminds the operator that the cylindrical blank exceeds the specified specifications.

[0056] The controller 39 controls the start of the test electromagnet 21. The test electromagnet 21 is energized and generates magnetism. The test electromagnet 21 and the magnetic ring block 12 are set with the same pole. The test electromagnet 21 is fixed to the top side wall of the test column 18 and pushes the magnetic ring block 12 through repulsion. The magnetic ring block 12 drives the cylindrical blank to rise to the top position of the rubber sleeve 28 through the material support rod 14. The magnetic ring block 12 is in contact with the bottom wall of the limiting ring block 13 above it.

[0057] The controller 39 controls the hydraulic cylinder 6 to start, and the power end of the hydraulic cylinder 6 extends to drive the upper mold 7 to descend. The cylindrical blank enters the interior of the upper mold 7. The upper mold 7 continues to press down on the cylindrical blank. The cylindrical blank uses the deformation characteristics of the return spring 16 to press down the material support rod 14 and the magnetic ring block 12 to enter the guide cylinder 9. The magnetic ring block 12 stops moving downward under the obstruction of the limiting ring block 13 below it. The material support rod 14 continues to descend, causing the measuring block 15 to fit against the upper wall of the test column 18, so that the upper mold 7 and the lower mold 10 extrude the cylindrical blank. At the same time, the proximity switch 20 senses the measuring block 15, and the controller 39 controls the power end of the hydraulic cylinder 6 to stop extending. The cylindrical blank is extruded by the upper mold and the lower mold of the first station to form the top and bottom rounded corners, completing the cold heading forming operation of the cylindrical blank in the first station.

[0058] After the cylindrical blank is processed in the first step, the controller 39 controls the hydraulic cylinder 6 to start. The power end of the hydraulic cylinder 6 shortens, causing the upper mold 7 to rise away from the cylindrical blank. The return spring 16 deforms and rebounds, causing the cylindrical blank to extend out of the guide cylinder 9 through the material support rod 14. The cylindrical blank is flush with the upper wall of the guide cylinder 9. At the same time, the controller 39 controls the pusher electromagnet 34 inside the loading cylinder 36 to be energized and generate magnetism. It then uses repulsive force to push the loading magnetic plate 35 to rise. The loading magnetic plate 35 pushes the second set of cylindrical blanks to a position flush with the loading cylinder 36. The drive motor 31 drives the drive gear 32 to rotate through the power end. The drive gear 32 drives the transmission toothed belt 27 to rotate around the elliptical frame 25. The transmission toothed belt 27 passes through the rubber sleeve 28. The cylindrical blank processed in the first process is moved to the second process. The newly added cylindrical blank enters the first process. The pre-formed cylindrical blank slides along the upper wall of the support plate 24 into the second station. The newly added cylindrical blank and the pre-formed cylindrical blank are respectively attached to the upper wall of the support rod 14. After the test electromagnet 21 is energized, it uses repulsive force to push the magnetic ring block 12. The magnetic ring block 12 slides up along the inner wall of the guide cylinder 9 and is attached to the bottom wall of the limiting ring block 13 above it. The magnetic ring block 12 drives the support rod 14 through the reset spring 16 to push the cylindrical blank to the top inner wall of the rubber sleeve 28. The two sets of hydraulic cylinders 6 are started at the same time to drive the upper mold 7 to process the new cylindrical blank and the pre-formed cylindrical blank synchronously.

[0059] Following the above operation, after the preliminary cylindrical blank undergoes secondary extrusion molding through the upper mold 7 and the lower mold 10, the upper and lower parts of the cylindrical blank form upper holes and bottom holes, and after the newly formed cylindrical blank undergoes extrusion molding through the upper mold 7 and the lower mold 10, the top and bottom form rounded corners.

[0060] Following the above operations, the cylindrical blank formed by the second cold heading is moved to the third process, and the initially formed cylindrical blank is moved to the second process.

[0061] Following the above operations, the upper and lower holes of the secondary cold-headed cylindrical blank are formed for perforation, and the pre-formed cylindrical blank is pressed for perforation. At the same time, a new set of cylindrical blanks enters station one for preliminary forming processing.

[0062] Following the above operation, the cylindrical blank, after being cold-forged three times, enters the upper part of the feeding cylinder 38 under the drive of the conveyor belt 27. The cylindrical blank slides down along the feeding cylinder 38, completing the multi-process forming operation of the cylindrical blank. The above operation can be repeated for the next use.

[0063] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] The present solution and its implementation methods have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present solution; the actual structure is not limited to this. In conclusion, if a person skilled in the art, inspired by this description, designs a similar structure and embodiment without departing from the inventive intent of this solution, such design should fall within the protection scope of this solution.

Claims

1. A welding nut forming die comprising a support frame, a forming frame and a machining frame, characterized in that: The moulding type cold heading mechanism and the elliptical type conveying mechanism are arranged on the upper wall of the supporting frame, the processing frame is arranged on the side wall of the supporting frame close to the moulding frame, the moulding type cold heading mechanism is arranged on the end of the processing frame away from the supporting frame, the elliptical type conveying mechanism is arranged on the moulding type cold heading mechanism, the moulding type cold heading mechanism comprises an upper die assembly, a lower die assembly, a material supporting assembly and a testing assembly, the upper die assembly is arranged on the end of the moulding frame away from the supporting frame, the lower die assembly is arranged on the end of the processing frame away from the supporting frame, the material supporting assembly is arranged in the lower die assembly, the testing assembly is arranged on the bottom wall of the supporting frame, the elliptical type conveying mechanism comprises an elliptical supporting assembly, a conveying assembly, a driving assembly and a feeding assembly, the elliptical supporting assembly is arranged on the lower die assembly, the conveying assembly is arranged outside the elliptical supporting assembly, the driving assembly is arranged on the elliptical supporting assembly, and the feeding assembly is arranged on the elliptical supporting assembly. The lower die assembly comprises a guide cylinder and a lower die. The material supporting assembly comprises a magnetic ring block, a limiting ring block, a material supporting rod, a position measuring block and a return spring, the magnetic ring block is slidably arranged on the inner wall of the guide cylinder, the limiting ring block is symmetrically arranged on the inner wall of the guide cylinder above and below the magnetic ring block, the position measuring block is arranged below the limiting ring block below the magnetic ring block, the return spring is arranged between the position measuring block and the magnetic ring block, and the material supporting rod is arranged on the upper wall of the position measuring block in the return spring and sequentially penetrates the lower die, the magnetic ring block and the limiting ring block. The testing assembly comprises a testing column, a groove, a proximity switch and a testing electromagnet, the testing column is arranged on the bottom wall of the supporting frame, the testing column is coaxially and vertically arranged with the guide cylinder, the groove is arranged on the upper wall of the testing column, the groove is arranged with an open upper end, the proximity switch is arranged in the groove, and the testing electromagnet is arranged on the side wall of the top of the testing column.

2. A swage nut forming die according to claim 1, wherein: The upper die assembly comprises a hydraulic cylinder and an upper die, the hydraulic cylinder is arranged on the end of the moulding frame away from the supporting frame, and the upper die is arranged on the power end of the hydraulic cylinder.

3. A weld nut forming die according to claim 2, wherein: The guide cylinder is arranged on the end of the processing frame away from the supporting frame, the guide cylinder is arranged in a penetrating mode, and the lower die is arranged on the inner wall of the top of the guide cylinder.

4. A weld nut forming die according to claim 3, wherein: The elliptical supporting assembly comprises a material supporting plate and an elliptical frame, the material supporting plate is symmetrically arranged on the top side wall and the bottom side wall of the guide cylinder, the upper wall and the bottom wall of the material supporting plate are flush with the upper wall and the bottom wall of the guide cylinder, and the elliptical frame is symmetrically arranged on the two sides of the material supporting plate.

5. A weld nut forming die according to claim 4, wherein: The conveying assembly comprises a transmission tooth belt and a rubber sleeve, the transmission tooth belt is rotatably arranged between the elliptical frames, the inner wall of the transmission tooth belt is slidably attached to the side wall of the material supporting plate, and a plurality of rubber sleeves are arranged in a penetrating mode on the side wall of the transmission tooth belt.

6. A weld nut forming die according to claim 5, wherein: The driving assembly comprises a motor frame, a driving motor and a driving gear, the motor frame is symmetrically arranged between the material supporting plate and the elliptical frame, the driving motor is arranged on the end of the motor frame away from the material supporting plate, the driving gear is arranged on the power end of the driving motor, and the driving gear is engaged with the transmission tooth belt.

7. A weld nut forming die according to claim 6, wherein: The feeding assembly comprises a pushing electromagnet, a material carrying magnetic plate, a feeding cylinder, a feeding groove and a discharging cylinder, the feeding cylinder is arranged in a penetrating mode on the one end of the material supporting plate, the feeding cylinder is arranged in a penetrating mode, the pushing electromagnet is arranged on the inner wall of the bottom of the feeding cylinder, the material carrying magnetic plate is slidably arranged on the inner wall of the feeding cylinder above the pushing electromagnet, the feeding groove is arranged on the top side wall of the feeding cylinder, the feeding groove is arranged in a penetrating mode, and the discharging cylinder is arranged in a penetrating mode on the end of the material supporting plate away from the feeding cylinder.

8. The process for forming a welding nut mold according to claim 7, characterized in that: Step one: in the initial state, the rubber sleeve is coaxially vertically arranged with the guide cylinder, the pusher electromagnet is electrified to generate magnetism, the pusher electromagnet is arranged with the same polarity as the carrier magnetic plate, the pusher electromagnet is fixed to the inner wall of the bottom of the feeding cylinder and pushes the carrier magnetic plate through repulsion, the carrier magnetic plate slides up along the feeding cylinder to lift the bottom wall of the cylindrical blank to the position where it is flush with the bottom wall of the rubber sleeve; Step two: the driving motor drives the driving gear to rotate, the driving gear is engaged with the transmission tooth belt, the driving gear drives the transmission tooth belt to rotate along the oval frame, the transmission tooth belt drives the cylindrical blank to move to the first station through the rubber sleeve, and the cylindrical blank slides along the upper wall of the supporting plate under the drive of the transmission tooth belt and enters the upper part of the first group of guide cylinders and is attached to the upper wall of the supporting rod; Step three: the test electromagnet is electrified to generate magnetism, the test electromagnet is arranged with the same polarity as the magnetic ring block, the test electromagnet is fixed to the top side wall of the test column and pushes the magnetic ring block through repulsion, the magnetic ring block drives the cylindrical blank to rise to the top of the rubber sleeve through the supporting rod, the magnetic ring block is attached to the bottom wall of the limiting ring block above it, the power end of the hydraulic cylinder is extended to drive the upper mold to descend, the cylindrical blank enters the inside of the upper mold, and the upper mold continues to press the cylindrical blank; Step four: the power end of the hydraulic cylinder is shortened to drive the upper mold to rise away from the cylindrical blank, the reset spring is deformed and rebounds to drive the cylindrical blank to extend out of the guide cylinder through the supporting rod, and the cylindrical blank is flush with the upper wall of the guide cylinder, at the same time, the pusher electromagnet in the feeding cylinder is electrified to generate magnetism and push the carrier magnetic plate up by repulsion, and the carrier magnetic plate pushes the second group of cylindrical blanks to the position where they are flush with the feeding cylinder; Step five: the newly added cylindrical blank and the preliminarily formed cylindrical blank are respectively attached to the upper wall of the supporting rod, the test electromagnet is respectively electrified to push the magnetic ring block through repulsion, the magnetic ring block slides up along the inner wall of the guide cylinder and is attached to the bottom wall of the limiting ring block above it, the magnetic ring block drives the supporting rod to push the cylindrical blank to the top inner wall of the rubber sleeve through the reset spring, and the two hydraulic cylinders are started at the same time to drive the upper mold to process the new cylindrical blank and the preliminarily formed cylindrical blank simultaneously.

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