Welded nut forming die and technological method thereof

Abstract

The invention belongs to the technical field of welding nut forming, and particularly relates to a welding nut forming die and a technological method.The welding nut forming die comprises a supporting frame, a forming frame, a machining frame, a die pressing type cold heading mechanism and an oval transformation type conveying mechanism, the forming frame is arranged on the upper wall of the supporting frame, and the machining frame is arranged on the side wall of the end, close to the forming frame, of the supporting frame; the mold pressing type cold heading mechanism is arranged at the end, away from the supporting frame, of the machining frame, the elliptic transition type conveying mechanism is arranged on the mold pressing type cold heading mechanism, and the mold pressing type cold heading mechanism comprises an upper mold assembly, a lower mold assembly, a material supporting assembly and a time measuring assembly. According to the welding nut forming die and the technological method thereof, multi-procedure one-time forming can be conducted on a welding nut, the forming length of a blank can be controlled, and the size specification of the formed welding nut is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of welding nut forming, and particularly relates to a welding nut forming die and a process method thereof. BACKGROUND

[0002] In the automobile welding nut manufacturing industry, the cold heading forming process has become the mainstream processing technology due to its obvious advantages. The process realizes near-net forming through plastic deformation of metal blank at room temperature, has the characteristics of efficient continuous production, and improves material utilization due to the characteristics of no cutting processing. In addition, the fiber flow line structure formed in the cold heading part processed by the process can significantly enhance the tensile strength and fatigue life of the nut, and therefore the process is particularly suitable for the stringent requirements of the automobile industry on high-strength connecting parts, and becomes a key manufacturing technology for ensuring the safety of vehicle body structure.

[0003] The existing welding nut forming die has the following problems: The existing welding nut forming die does not have the capability of one-time forming of the welding nut in multiple processes, prolongs the production cycle, and reduces the forming efficiency of the welding nut. In addition, the traditional welding nut forming die also does not have the capability of controlling the forming length of the blank, so that the size specification of the formed welding nut cannot meet the size requirement. Therefore, the existing welding nut forming die cannot meet the use requirements. SUMMARY

[0004] In view of the above problems, the present application provides a welding nut forming die and a process method thereof, which can form the welding nut in multiple processes at one time and control the forming length of the blank to ensure the size specification of the formed welding nut.

[0005] The technical scheme adopted by the present application is as follows: the welding nut forming die provided by the present application comprises a support 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 support frame. The processing frame is arranged on the end wall of the support frame close to the forming frame. The die type cold heading mechanism is arranged on the end of the processing frame away from the support 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 timing assembly. The upper die assembly is arranged on the end of the forming frame away from the support frame. The lower die assembly is arranged on the end of the processing frame away from the support frame. The material supporting assembly is arranged in the lower die assembly. The timing assembly is arranged on the bottom wall of the support frame. The elliptical type conveying mechanism comprises an elliptical support assembly, a conveying assembly, a driving assembly and a feeding assembly. The elliptical support assembly is arranged on the lower die assembly. The conveying assembly is arranged on the outer side of the elliptical support assembly. The driving assembly is arranged on the elliptical support assembly. The feeding assembly is arranged on the elliptical support assembly.

[0006] As a further preferred embodiment of the present application, the upper die assembly comprises a hydraulic cylinder and an upper die, the hydraulic cylinder is arranged at the end of the forming frame away from the support frame, and the upper die is arranged at the power end of the hydraulic cylinder; the lower die assembly comprises a guide cylinder and a lower die, the guide cylinder is arranged at the end of the processing frame away from the support frame, the guide cylinder is arranged in a through manner, and the lower die is arranged on the inner wall of the top of the guide cylinder; 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 arranged in a sliding manner 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 in a penetrating manner on the upper wall of the position measuring block inside the return spring, sequentially penetrating the lower die, the magnetic ring block and the limiting ring block; the time measuring assembly comprises a test column, a groove, a proximity switch and a test electromagnet, the test column is arranged on the bottom wall of the support frame, the test column is arranged in a vertical coaxial manner with the guide cylinder, the groove is arranged on the upper wall of the test column, the groove is arranged in an open upper end manner, the proximity switch is arranged inside the groove, and the test electromagnet is arranged on the top side wall of the test column.

[0007] Preferably, the elliptical support 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 respectively, and the elliptical frame is symmetrically arranged on both sides of the material supporting plate; the conveying assembly comprises a transmission tooth belt and a rubber sleeve, the transmission tooth belt is arranged in a rotating manner between the elliptical frames, the inner wall of the transmission tooth belt is in sliding fit with the side wall of the material supporting plate, and a plurality of rubber sleeves are arranged in a penetrating manner on the side wall of the transmission tooth belt; 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 at the end of the motor frame away from the material supporting plate, and the driving gear is arranged at the power end of the driving motor and engaged with the transmission tooth belt; 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 manner between the ends of the material supporting plate, the feeding cylinder is arranged in a through manner, the pushing electromagnet is arranged on the inner wall of the bottom of the feeding cylinder, the material carrying magnetic plate is arranged in a sliding manner 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 through manner, and the discharging cylinder is arranged in a penetrating manner at the end of the material supporting plate away from the feeding cylinder, the discharging cylinder is arranged in a through manner.

[0008] A process method of a welding nut forming die, the steps are as follows: Step one: the sheared cylindrical blank is placed on the loading magnetic plate wall inside the loading cylinder through the feeding slot. In the initial state, the rubber sleeve is coaxially and vertically arranged with the guide cylinder. The push magnet is electrified to generate magnetism. The push magnet and the loading magnetic plate are arranged with the same polarity. The push magnet is fixed on the bottom inner wall of the loading cylinder and pushes the loading magnetic plate through repulsion. The loading magnetic plate slides up along the loading 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. The driving motor drives the driving gear to rotate. The driving gear is engaged with the transmission belt. The driving gear drives the transmission belt to rotate along the oval frame. The transmission belt drives the cylindrical blank to move to the first station through the rubber sleeve. The cylindrical blank slides along the upper wall of the supporting plate under the drive of the transmission belt and enters the first group of guide cylinders above the supporting rod. The power end of the hydraulic cylinder is in the shortening state. The upper die and the lower die assembly are in the longest distance. At this time, the test magnet is electrified to generate magnetism. The test magnet and the magnetic ring block are arranged with the same polarity. The test magnet is fixed on 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 position 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 elongated to drive the upper die to descend. The cylindrical blank enters the inside of the upper die. The upper die continues to press down the cylindrical blank. The cylindrical blank presses down the supporting rod and the magnetic ring block into the guide cylinder by using the deformation characteristics of the return spring. The magnetic ring block stops moving downward under the block of the limiting ring block below it. The supporting rod continues to descend to drive the measuring block to attach to the upper wall of the test column. The upper die and the lower die extrude the cylindrical blank. The proximity switch senses the measuring block. The power end of the hydraulic cylinder stops elongation. The cylindrical blank is extruded by the upper die and the lower die of the first station to form the top and bottom round corners. The cold heading forming operation of the cylindrical blank in the first station is completed. Step two: after the first process is completed, the hydraulic cylinder power end is shortened to drive the upper mold to rise away from the cylindrical blank, the reset spring is deformed to pop out the cylindrical blank into the guiding cylinder, and the load plate is pushed up by the magnetic force of the electromagnet in the upper cylinder, the second group of cylindrical blanks is pushed to the position of the upper cylinder, the driving motor drives the driving gear to rotate, the driving gear drives the transmission belt to rotate around the oval frame, the transmission belt drives the cylindrical blank after the first process to move to the second process, the newly added cylindrical blank enters the first process, the cylindrical blank after the first process slides along the upper wall of the supporting plate into the second process, the newly added cylindrical blank and the cylindrical blank after the first process are respectively attached to the upper wall of the supporting plate, the test electromagnet is energized to push the magnetic ring block by repulsive force, the magnetic ring block slides along the inner wall of the guiding cylinder and rises to the bottom wall of the limiting ring block above, the cylindrical blank is pushed to the top inner wall of the rubber sleeve by the supporting rod driven by the reset spring, and the two groups of hydraulic cylinders are started to drive the upper mold to process the new cylindrical blank and the cylindrical blank after the first process simultaneously. Step three: according to the above operation, after the cylindrical blank after the first process is processed by the upper mold and the lower mold, the upper part and the bottom part of the cylindrical blank form upper holes and bottom holes, and after the newly added cylindrical blank is processed by the upper mold and the lower mold, the top and the bottom form a rounded corner. Step four: according to the above operation, move the cylindrical blank after the second cold heading to the third process, and move the cylindrical blank after the first process to the second process. Step five: according to the above operation, the upper part and the bottom part of the cylindrical blank after the second cold heading are perforated, the cylindrical blank after the first process is pressed, and a new group of cylindrical blanks enters the first process for preliminary forming. Step six: according to the above operation, the cylindrical blank after the third cold heading is driven by the transmission belt into the upper part of the discharging cylinder, and the cylindrical blank slides down along the discharging cylinder to complete the multi-process forming operation of the cylindrical blank.

[0009] Specifically, the side wall of the supporting frame is provided with a controller.

[0010] The controller is electrically connected with the hydraulic cylinder, the proximity switch, the test electromagnet and the driving motor respectively.

[0011] The above structure has the following beneficial effects: Compared with the prior art, the scheme adopts the mode of combining the die pressing type cold heading mechanism with the elliptical rotation type conveying mechanism, through the upper die assembly, the lower die assembly, the material supporting assembly, the timing assembly, the elliptical supporting assembly, the conveying assembly, the driving assembly and the feeding assembly, when the circular double-head welded nut blank is manufactured, the cylindrical blank can be processed in multiple processes by using the elliptical rotation force, one-time forming of the cylindrical blank is realized, secondary processing is avoided, the utilization rate of the material is improved, the production cycle of the circular double-head welded nut is shortened, and the cold heading forming efficiency of the circular double-head welded nut blank is greatly improved. And through the pre-push of the cylindrical blank by the material supporting rod, the length of the cut cylindrical blank can be monitored, when the length of the cylindrical blank is short, the power end of the hydraulic cylinder is elongated to the preset distance, the cylindrical blank cannot be driven by the material supporting rod to adhere to the test column with the measuring block, and then the proximity switch cannot sense the measuring block and remind the operator that the cylindrical blank does not reach the specified specification; when the length of the cylindrical blank is long, the power end of the hydraulic cylinder cannot be elongated to the preset distance, so that the proximity switch senses the measuring block, reminding the operator that the cylindrical blank exceeds the specified specification; the size of the formed circular double-head welded nut is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the scheme; Figure 2 It is a front view of the scheme; Figure 3 It is a bottom view of the scheme; Figure 4 It is a schematic diagram of the structure of the die pressing type cold heading mechanism of the scheme; Figure 5 It is a combined structure schematic diagram of the elliptical supporting assembly and the driving assembly of the scheme; Figure 6 It is a front view of the scheme; Figure 7 It is a side view of the scheme; Figure 8 It is a top view of the scheme; Figure 9 It is Figure 6 A-A sectional view of the scheme; Figure 10 It is Figure 8 B-B sectional view of the scheme; Figure 11 It is Figure 9 I enlarged structure view of the scheme; Figure 12 It is Figure 10 II enlarged structure view of the scheme; Figure 13 It is Figure 4Part III of the enlarged structural view of the application.

[0013] Wherein, 1, support frame, 2, forming frame, 3, processing frame, 4, die type cold heading mechanism, 5, upper die assembly, 6, hydraulic cylinder, 7, upper die, 8, lower die assembly, 9, guide cylinder, 10, lower die, 11, material supporting assembly, 12, magnetic ring block, 13, limit ring block, 14, material supporting rod, 15, position measuring block, 16, return spring, 17, time measuring assembly, 18, test column, 19, groove, 20, proximity switch, 21, test electromagnet, 22, oval type conveying mechanism, 23, oval supporting assembly, 24, material supporting plate, 25, oval frame, 26, conveying assembly, 27, transmission tooth belt, 28, rubber sleeve, 29, driving assembly, 30, motor frame, 31, driving motor, 32, driving gear, 33, feeding assembly, 34, pushing electromagnet, 35, material carrying magnetic plate, 36, feeding cylinder, 37, feeding groove, 38, discharging cylinder, 39, controller.

[0014] The accompanying drawings are used to provide further understanding of the present application, and form a part of the specification, which are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0016] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application.

[0017] As Figures 1-13As shown, the welding nut forming die provided by the present scheme comprises a support frame 1, a forming frame 2, a processing frame 3, a die type cold heading mechanism 4 and an elliptical type conveying mechanism 22, the forming frame 2 is arranged on the upper wall of the support frame 1, the processing frame 3 is arranged on the end side wall of the support frame 1 close to the forming frame 2, the die type cold heading mechanism 4 is arranged on the end of the processing frame 3 away from the support frame 1, the die type cold heading mechanism 4 is arranged on the processing frame 3, the die type cold heading mechanism 4 comprises an upper die assembly 5, a lower die assembly 8, a material supporting assembly 11 and a timing assembly 17, the upper die assembly 5 is arranged on the end of the forming frame 2 away from the support frame 1, the lower die assembly 8 is arranged on the end of the processing frame 3 away from the support frame 1, the material supporting assembly 11 is arranged inside the lower die assembly 8, and the timing assembly 17 is arranged on the bottom wall of the support frame 1, the elliptical type conveying mechanism 22 comprises an elliptical support assembly 23, a conveying assembly 26, a driving assembly 29 and a feeding assembly 33, the elliptical support assembly 23 is arranged on the lower die assembly 8, the conveying assembly 26 is arranged outside the elliptical support assembly 23, the driving assembly 29 is arranged on the elliptical support assembly 23, and the feeding assembly 33 is arranged on the elliptical support assembly 23.

[0018] The upper die assembly 5 comprises a hydraulic cylinder 6 and an upper die 7, the hydraulic cylinder 6 is arranged on the end of the forming frame 2 away from the support frame 1, and the upper die 7 is arranged on the power end of the hydraulic cylinder 6; the lower die assembly 8 comprises a guide cylinder 9 and a lower die 10, the guide cylinder 9 is arranged on the end of the processing frame 3 away from the support frame 1, the guide cylinder 9 is arranged in a penetrating manner, and the lower die 10 is arranged on the inner wall of the top of the guide cylinder 9; the material supporting assembly 11 comprises a magnetic ring block 12, a limiting ring block 13, a material supporting rod 14, a position measuring block 15 and a return spring 16, the magnetic ring block 12 is arranged in a sliding manner on the inner wall of the guide cylinder 9, the limiting ring block 13 is symmetrically arranged on the inner wall of the guide cylinder 9 above and below the magnetic ring block 12, the position measuring block 15 is arranged below the limiting ring block 13 below the magnetic ring block 12, the return spring 16 is arranged between the position measuring block 15 and the magnetic ring block 12, and the material supporting rod 14 penetrates the lower die 10, the magnetic ring block 12 and the limiting ring block 13 in sequence and is arranged on the upper wall of the position measuring block 15 inside the return spring 16; the timing assembly 17 comprises a test column 18, a groove 19, a proximity switch 20 and a test electromagnet 21, the test column 18 is arranged on the bottom wall of the support frame 1, the test column 18 is arranged in a coaxial and vertical manner with the guide cylinder 9, the groove 19 is arranged on the upper wall of the test column 18, the groove 19 is arranged in an open upper end manner, the proximity switch 20 is arranged inside the groove 19, and the test electromagnet 21 is arranged on the top side wall of the test column 18.

[0019] The elliptical support assembly 23 comprises a material supporting plate 24 and an elliptical frame 25, the material supporting plate 24 is symmetrically arranged on the top side wall and the bottom side wall of the guide cylinder 9, the upper wall and the bottom wall of the material supporting plate 24 are flush with the upper wall and the bottom wall of the guide cylinder 9 respectively, and the elliptical frame 25 is symmetrically arranged on both sides of the material supporting plate 24; the conveying assembly 26 comprises a transmission toothed belt 27 and a rubber sleeve 28, the transmission toothed belt 27 is rotatably arranged between the elliptical frames 25, the inner wall of the transmission toothed belt 27 is slidably attached to the side wall of the material supporting plate 24, and a plurality of rubber sleeves 28 are penetratingly arranged on the side wall of the transmission toothed belt 27; the driving assembly 29 comprises a motor frame 30, a driving motor 31 and a driving gear 32, the motor frame 30 is symmetrically arranged between the material supporting plate 24 and the elliptical frame 25, the driving motor 31 is arranged at one end of the motor frame 30 away from the material supporting plate 24, and the driving gear 32 is arranged at the power end of the driving motor 31, and the driving gear 32 is engaged with the transmission toothed belt 27; the feeding assembly 33 comprises a material pushing electromagnet 34, a material carrying magnetic plate 35, a feeding cylinder 36, a feeding groove 37 and a discharging cylinder 38, the feeding cylinder 36 is penetratingly arranged between one end of the material supporting plate 24, and the feeding cylinder 36 is penetratingly arranged, the material pushing electromagnet 34 is arranged on the inner wall of the bottom of the feeding cylinder 36, the material carrying magnetic plate 35 is slidably arranged on the inner wall of the feeding cylinder 36 above the material pushing electromagnet 34, the feeding groove 37 is arranged on the top side wall of the feeding cylinder 36, and the feeding groove 37 is penetratingly arranged, and the discharging cylinder 38 is penetratingly arranged at one end of the material supporting plate 24 away from the feeding cylinder 36, and the discharging cylinder 38 is penetratingly arranged.

[0020] The side wall of the support frame 1 is provided with a controller 39.

[0021] The controller 39 is electrically connected with the hydraulic cylinder 6, the proximity switch 20, the test electromagnet 21 and the driving motor 31 respectively.

[0022] A process method of a welding nut forming die, the steps are as follows: Step one: the sheared cylindrical blank is placed into the upper loading slot 37 and onto the upper wall of the loading magnetic plate 35 inside the upper loading cylinder 36. In the initial state, the rubber sleeve 28 is coaxially and vertically arranged with the guide cylinder 9. The push magnet 34 is electrified to generate magnetism. The push magnet 34 is arranged with the same polarity as the loading magnetic plate 35. The push magnet 34 is fixed to the inner wall of the bottom of the upper loading cylinder 36 and pushes the loading magnetic plate 35 through repulsion. The loading magnetic plate 35 slides upwards along the upper loading cylinder 36 to lift the bottom wall of the cylindrical blank to a position level with the bottom wall of the rubber sleeve 28. The driving motor 31 drives the driving gear 32 to rotate. The driving gear 32 is engaged with the transmission tooth belt 27. The driving gear 32 drives the transmission tooth belt 27 to rotate along the oval frame 25. The transmission tooth belt 27 drives the cylindrical blank to move towards the first station through the rubber sleeve 28. The cylindrical blank slides along the upper wall of the supporting plate 24 under the drive of the transmission tooth belt 27 and enters the first group of guide cylinders 9 above the supporting rod 14. The power end of the hydraulic cylinder 6 is in a shortened state. The upper die 7 and the lower die assembly 8 are at the longest distance. At this time, the test magnet 21 is electrified to generate magnetism. The test magnet 21 is arranged with the same polarity as the magnetic ring block 12. The test magnet 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 supporting rod 14. The magnetic ring block 12 is attached to the bottom wall of the limiting ring block 13 above it. The power end of the hydraulic cylinder 6 is elongated to drive the upper die 7 to descend. The cylindrical blank enters the inside of the upper die 7. The upper die 7 continuously presses the cylindrical blank downward. The cylindrical blank presses the supporting rod 14 and the magnetic ring block 12 into the guide cylinder 9 by using the deformation characteristics of the return spring 16. The magnetic ring block 12 stops moving downward under the block of the limiting ring block 13 below it. The supporting rod 14 continues to descend to drive the measuring block 15 to attach to the upper wall of the test column 18. The upper die 7 and the lower die 10 extrude the cylindrical blank. The proximity switch 20 senses the measuring block 15. The power end of the hydraulic cylinder 6 stops elongation. The cylindrical blank is extruded by the upper die and the lower die of the first station to form the top and bottom corners. The cold heading forming operation of the cylindrical blank in one station is completed. Step two: After the first process is completed, the hydraulic cylinder 6 power end shortens to drive the upper die 7 to rise away from the cylindrical blank, and the reset spring 16 deforms to return to the original position. The cylindrical blank is brought out of the guide cylinder 9 and is flush with the upper wall. At the same time, the pusher electromagnet 34 in the feeding cylinder 36 generates a magnetic force to push the load magnetic plate 35 up. The load magnetic plate 35 pushes the second group of cylindrical blanks to the position flush with the feeding cylinder 36. The driving motor 31 drives the driving gear 32 to rotate through the power end. The driving gear 32 drives the transmission belt 27 to rotate around the oval frame 25. The transmission belt 27 drives the cylindrical blank processed in the first process to move to the second process. The newly added cylindrical blank enters the first process. The cylindrical blank is initially formed along the upper wall of the supporting plate 24 and enters the second process. The newly added cylindrical blank and the cylindrical blank are respectively attached to the upper wall of the supporting plate 24. The test electromagnet 21 generates a magnetic force to push the magnetic ring block 12. The magnetic ring block 12 slides along the inner wall of the guide cylinder 9 and rises to the bottom wall of the limiting ring block 13. The magnetic ring block 12 drives the cylindrical blank to the top of the rubber sleeve 28 through the reset spring 16. The two hydraulic cylinders 6 are started simultaneously to drive the upper die 7 to process the new cylindrical blank and the cylindrical blank simultaneously. Step three: According to the above operation, after the cylindrical blank is processed by the upper die 7 and the lower die 10, the upper part and the bottom part of the cylindrical blank form an upper hole and a bottom hole. After the newly added cylindrical blank is processed by the upper die 7 and the lower die 10, the top and the bottom form a round corner. Step four: According to the above operation, the twice cold heading formed cylindrical blank is moved to the third process, and the initially formed cylindrical blank is moved to the second process. Step five: According to the above operation, the upper part and the bottom part of the twice cold heading formed cylindrical blank are perforated, and the cylindrical blank is pressed. At the same time, a new group of cylindrical blanks enters the first process for initial forming. Step six: According to the above operation, the cylindrical blank is brought into the upper part of the discharging cylinder 38 under the driving of the transmission belt 27. The cylindrical blank slides along the discharging cylinder 38 and falls, completing the multi-process forming operation of the cylindrical blank.

[0023] In specific use, in the initial state, the reset spring 16 is in a shortened state, the supporting rod 14 is flush with the upper wall of the guide cylinder 9 and the upper wall of the supporting plate 24, the rubber sleeve 28 is coaxial and vertically arranged with the guide cylinder 9, and the power end of the hydraulic cylinder 6 is in a shortened state. The upper die 7 and the lower die assembly 8 are in the longest distance. The cylindrical blank is cold upsetting processed, the sheared cylindrical blank is placed on the upper wall of the loading magnetic plate 35 inside the loading cylinder 36 through the loading slot 37, the controller 39 controls the pushing electromagnet 34 to start, the pushing electromagnet 34 generates magnetism after being electrified, the pushing electromagnet 34 is arranged with the same polarity as the loading magnetic plate 35, the pushing electromagnet 34 is fixed on the bottom inner wall of the loading cylinder 36 and pushes the loading magnetic plate 35 through repulsion, the loading magnetic plate 35 slides upwards along the loading cylinder 36 to lift the bottom wall of the cylindrical blank to a position flat with the bottom wall of the rubber sleeve 28, the controller 39 controls the driving motor 31 to start, the driving motor 31 drives the driving gear 32 to rotate through the power end, the driving gear 32 is engaged with the transmission toothed belt 27, the driving gear 32 drives the transmission toothed belt 27 to rotate along the oval frame 25, the transmission toothed belt 27 drives the cylindrical blank to move to the first station through the rubber sleeve 28, the cylindrical blank slides along the upper wall of the supporting plate 24 under the driving of the transmission toothed belt 27 to enter the above of the first group of guide cylinders 9 and adhere to the upper wall of the supporting rod 14; In order to prevent the cylindrical blanks with shorter length from being mixed and processed, affecting the overall processing quality and size, when the power end of the hydraulic cylinder 6 is stretched to a certain length or close to the sensing block 15 sensed by the proximity switch 20, the power end of the hydraulic cylinder 6 stops stretching and performs reverse shortening operation: When the length of the cylindrical blank is shorter, the cylindrical blank cannot adhere to the test column 18 with the sensing block 15 driven by the supporting rod 14 after the power end of the hydraulic cylinder 6 is stretched to the preset distance, so that the proximity switch 20 cannot sense the sensing block 15 and remind the operator that the cylindrical blank does not reach the specified specification; When the length of the cylindrical blank is longer, the power end of the hydraulic cylinder 6 cannot be stretched to the preset distance, so that the proximity switch 20 senses the sensing block 15, reminding the operator that the cylindrical blank exceeds the specified specification; The controller 39 controls the test electromagnet 21 to start, the test electromagnet 21 generates magnetism after being electrified, the test electromagnet 21 is arranged with the same polarity as the magnetic ring block 12, the test electromagnet 21 is fixed on 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 supporting rod 14, and the magnetic ring block 12 adheres to the bottom wall of the limiting ring block 13 above it; The controller 39 controls the hydraulic cylinder 6 to start, and the power end of the hydraulic cylinder 6 is elongated to drive the upper die 7 to descend, the cylindrical blank enters the inside of the upper die 7, the upper die 7 continuously presses the cylindrical blank, the cylindrical blank is pressed into the inside of the guide cylinder 9 by the reset spring 16, the magnetic ring block 12 stops moving downward under the block of the limiting ring block 13 below, the material supporting rod 14 continues to descend to drive the measuring block 15 to be attached to the upper wall of the test column 18, so that the upper die 7 and the lower die 10 extrude the cylindrical blank, and the proximity switch 20 senses the measuring block 15, the controller 39 controls the power end of the hydraulic cylinder 6 to stop elongation, and the cylindrical blank is extruded to form top and bottom round corners by the upper die and the lower die of the first station, and the cold heading forming operation of the cylindrical blank in the first station is completed; After the cylindrical blank is processed in the first station, the controller 39 controls the hydraulic cylinder 6 to start, and the power end of the hydraulic cylinder 6 is shortened to drive the upper die 7 to ascend away from the cylindrical blank, the reset spring 16 is deformed to rebound to drive the cylindrical blank to extend into the inside of the guide cylinder 9, the cylindrical blank is flush with the upper wall of the guide cylinder 9, at the same time, the controller 39 controls the pushing electromagnet 34 in the feeding cylinder 36 to generate magnetism after being electrified, and the load material magnetic plate 35 is pushed to ascend by repulsive force, the load material magnetic plate 35 pushes the second group of cylindrical blanks to the position flush with the feeding cylinder 36, the driving motor 31 drives the driving gear 32 to rotate through the power end, the driving gear 32 drives the transmission tooth belt 27 to rotate around the oval frame 25, the transmission tooth belt 27 drives the cylindrical blank processed in the first station to move to the second station through the rubber sleeve 28, the newly added cylindrical blank enters the first station, and the preliminarily formed cylindrical blank slides along the upper wall of the material supporting plate 24 to enter the second station, the newly added cylindrical blank and the preliminarily formed cylindrical blank are respectively attached to the upper wall of the material supporting rod 14, the test electromagnet 21 respectively generates magnetism after being electrified to push the magnetic ring block 12 by repulsive force, the magnetic ring block 12 slides along the inner wall of the guide cylinder 9 to ascend and is attached to the bottom wall of the limiting ring block 13 above, the magnetic ring block 12 drives the material supporting rod 14 to push the cylindrical blank to the top inner wall of the rubber sleeve 28 through the reset spring 16, and the two hydraulic cylinders 6 are started at the same time to drive the upper die 7 to process the new cylindrical blank and the preliminarily formed cylindrical blank synchronously; According to the above operation, after the preliminarily formed cylindrical blank is processed by the upper die 7 and the lower die 10 twice, the upper part and the bottom part of the cylindrical blank form upper holes and bottom holes, and after the newly added cylindrical blank is processed by the upper die 7 and the lower die 10, the top and the bottom form round corners; According to the above operation, the twice cold heading formed cylindrical blank is moved to the third station, and the preliminarily formed cylindrical blank is moved to the second station; According to the above operation, the upper hole and the bottom hole are formed by the piercing operation on the upper part and the bottom part of the cylindrical blank formed by the secondary cold upsetting, and the preliminary formed cylindrical blank is subjected to the piercing operation, and meanwhile, a new group of cylindrical blanks enters the work station one for the preliminary forming operation; According to the above operation, the cylindrical blank formed by the three times of cold upsetting is driven into the upper part of the blanking cylinder 38 under the driving of the transmission tooth belt 27, and the cylindrical blank slides and falls along the blanking cylinder 38, and the multi-process forming operation on the cylindrical blank is completed; the above operation can be repeated for the next use.

[0024] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that includes a list of elements not only includes those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0025] The above describes the technical scheme and the embodiments thereof, which are not limited, and the embodiments shown in the drawings are only one of the embodiments of the technical scheme, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the technical scheme, similar structure modes and embodiments can be designed without creative design, which should belong to the protection scope of the technical scheme.

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 timing 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, and the timing 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 timing 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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