CN114054562A - Manufacturing process, structure and manufacturing die of sheet self-forming rivet - Google Patents
Manufacturing process, structure and manufacturing die of sheet self-forming rivet Download PDFInfo
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- CN114054562A CN114054562A CN202010740783.2A CN202010740783A CN114054562A CN 114054562 A CN114054562 A CN 114054562A CN 202010740783 A CN202010740783 A CN 202010740783A CN 114054562 A CN114054562 A CN 114054562A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims description 47
- 238000007599 discharging Methods 0.000 claims description 31
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000004080 punching Methods 0.000 claims description 9
- 238000000641 cold extrusion Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 238000007652 sheet-forming process Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
- B21G3/00—Making pins, nails, or the like
- B21G3/18—Making pins, nails, or the like by operations not restricted to one of the groups B21G3/12 - B21G3/16
- B21G3/28—Making pins, nails, or the like by operations not restricted to one of the groups B21G3/12 - B21G3/16 by forging or pressing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/04—Rivets; Spigots or the like fastened by riveting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forging (AREA)
Abstract
The invention provides a manufacturing process, a structure and a manufacturing die of a sheet self-forming rivet, which comprise a material body, a cavity and a rivet, wherein one side of the material body forms an integrated rivet through the manufacturing process of the sheet self-forming rivet, and the cavity formed by the process of the claim 1 is arranged at one side of the rivet close to the material body. The invention overcomes the unfavorable condition of material flow in the thickness direction in the sheet forming process through twice forming, is stable and efficient, and forms a rivet-like structure with certain strength and height on the sheet, thereby realizing the purposes of simplifying the working procedure and reducing the cost.
Description
Technical Field
The invention mainly relates to the field of punch forming, in particular to a manufacturing process, a structure and a manufacturing die of a sheet self-forming rivet.
Background
In the design of automobile parts, a rivet structure for limiting, bearing, motion transmission and other requirements is often needed, if the mode of adding rivets on a plate is high in cost and multiple in process, in the field of stamping forming, a large amount of materials on the front surface of a thick plate of 4-5mm are extruded to the other side to obtain a rivet-like structure of 4mm by using a volume forming method for reducing cost, but due to the flowing relationship of the materials, the extruded rivet materials can only reach 40% -60% of the extruded materials, and the forming force is very large. Because the utilization rate of the extruded material is low, the height of the extruded rivet structure is greatly limited, when the rivet structure with the height close to 3.5mm needs to be manufactured on a 2-3mm thin plate, the material is easier to diffuse to the periphery instead of transferring to the thickness direction in the thin material forming process, so that the forming height is lower than the forming height of a thick material, and the working procedure of adding the riveting rivet on the thin plate is often adopted, so that the working procedure process and the cost are increased.
The published Chinese invention patent, application number CN201822176203.2, patent name: a rapid cooling rivet mold having a spiral groove, as of the filing date: 20181225, the invention relates to a rapid cooling rivet mould with spiral groove, comprising an upper template, a lower template, an upper mould and a lower mould, wherein the lower end of the upper template is fixed with the upper mould, the top end of the upper template is provided with a circular diversion trench, and the diversion trench extends downwards to the inside of the upper template and is provided with a double T-shaped air cooling trench; a spiral cooling tank is arranged between the lower die and the lower die plate, the bottom of the spiral cooling tank is communicated with a water storage tank, and a water inlet pipe and a water outlet pipe are arranged on one side of the water storage tank; the upper die plate is provided with the double T-shaped air cooling grooves, so that the strength of the whole die is enhanced, the upper die plate is not easy to deform in the pressing process, and the service life of the whole die is prolonged; the water storage tank arranged on the lower template is provided with a water inlet pipe and a water outlet pipe, so that cooling water can be replaced in time, the cooling effect is improved, and the overall quality of the rivet is enhanced; the lower template is provided with the spiral cooling tank and communicates with each other with the aqua storage tank, and is big to the cooling area of lower template, and the cooling effect is better.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a manufacturing process, a structure and a manufacturing die of a sheet self-forming rivet, wherein the rivet structure obtained by the method reduces the process procedures and reduces the production cost, and specifically comprises the following steps:
the manufacturing process of the sheet self-forming rivet is characterized by comprising the following steps:
step S1: in the initial state, the mould is in the mould opening state, and a workpiece is placed on a floating block 19 of the mould and positioned;
step S2: the punching machine works, the die descends, the upper die base 1, the upper backing plate 2, the upper fixing plate 3, the discharging backing plate 4 and the discharging plate 5 start to descend, and the discharging plate insert 13 contacts with a workpiece firstly;
step S3: continuing descending, wherein the upper die base 1, the upper backing plate 2, the upper fixing plate 3, the discharging backing plate 4 and the discharging plate 5 are elastically connected, the buoyancy lifting block 19 is tightly attached to the lower backing plate 7, the buoyancy lifting block 19 descends by 5.0mm, the gap between the upper die and the lower die is 2.5mm, and the discharging plate 5 and the discharging plate insert 13 are tightly pressed on a workpiece;
step S4: when the slide block of the punch press machine tool continues to move downwards, the stroke is compressed until the upper die moves downwards to the bottom dead center of the machine tool, a part of material is extruded into a lower cavity by a first extrusion punch 11 with the diameter similar to that of a rivet, a conical cavity is formed above the material, after the extrusion forming of a workpiece is finished, the slide block of the punch press starts to move upwards after the punching operation is finished, and the workpiece taking is finished until the die returns to the top dead center;
step S5: and (5) continuously repeating the steps S1 to S4 by using the second extrusion punch 21, wherein the second extrusion punch 21 continuously extrudes the material downwards into the lower conical cavity, the material moves inwards firstly and then moves downwards, and finally, a rivet structure integrated with the material is formed on the surface of the material with the thickness of 2.5 mm.
Preferably, the first extrusion punch 11 is a conical punch matched with the diameter of the rivet, and the second extrusion punch 21 is a positive extrusion punch.
A sheet metal self-forming rivet structure comprises a material body 23, a cavity 24 and a rivet 25, wherein one side of the material body 23 is provided with the rivet 25 formed in an integral manner through the manufacturing process of the sheet metal self-forming rivet according to the claim 1, and one side of the rivet 25, which is close to the material body 23, is provided with the cavity 24 formed through the process according to the claim 1.
A manufacturing die for a sheet self-forming rivet comprises an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die base 1, an upper padding plate 2, an upper fixing plate 3, a discharging padding plate 4 and a discharging plate 5 which are sequentially connected in parallel and elastically from top to bottom, and the upper die base 1, the upper padding plate 2 and the upper fixing plate 3 are sequentially fixed from top to bottom to form an upper half section which can move in time along with a press; the unloading backing plate 4 and the unloading plate 5 are fixed to form a buffer section;
a first extrusion punch 11 and a second extrusion punch 21 are arranged on different stations on the upper fixing plate 3, the first extrusion punch 11 is a conical punch, the second extrusion punch 21 comprises a punch body 211 and a forming boss 212, and the forming boss 212 is arranged on one side of the punch body 211 close to the lower die assembly;
the lower mould subassembly is located the mould subassembly under, lower mould subassembly from the top down includes: the die comprises a concave die plate 6, a lower backing plate 7 and a lower die holder 8, wherein the concave die plate 6, the lower backing plate 7 and the lower die holder 8 are fixedly arranged;
the die plate 6 is provided with a floating block 19 corresponding to the first extrusion punch 11, a positioning pin 17, a stop block 18 and a positioning block 16 are arranged in the floating block 19, a transmission rod 20 penetrating through the lower die assembly is arranged below the floating block 19, a die insert 22 is fixedly mounted on the lower backing plate 7 through an inner hexagonal screw, and the fillet at the inlet of the die insert 22 is 0.2-0.3mm larger than that of a cold extrusion part.
Preferably, a stripper plate insert 13 is arranged in the stripper plate 5, and the stripper plate insert 13 is sleeved outside the first extrusion punch 11.
Preferably, the lower backing plate 7 is fixedly provided with a limiting column 15 through a hexagon socket head cap screw, and the positioning pin 17 is arranged corresponding to the reference hole of the positioning part.
Preferably, one end of the transmission rod 20, which is far away from the lower die assembly, is connected with an upper striking plate 9, one end of the upper striking plate 9, which is far away from the transmission rod 20, is provided with a lower striking plate 10 in parallel, and a discharging screw and a rectangular spring are arranged between the upper striking plate 9 and the lower striking plate 10.
Preferably, the upper half section and the buffer section are mutually independent, and equal-height screws 12 and rectangular springs are arranged between the discharging backing plate 5 and the upper die holder 1, the upper backing plate 2 and the upper fixing plate 3.
The invention has the beneficial effects that: the condition that materials flow in the thickness direction in the thin plate forming process is overcome through twice forming, stability and high efficiency are achieved, and the rivet-like structure with certain strength and height is formed on the thin plate, so that the purposes of simplifying the process and reducing the cost are achieved.
Drawings
FIG. 1 is a block diagram of step S1 according to the present invention;
FIG. 2 is a block diagram of step S2 according to the present invention;
FIG. 3 is a block diagram of step S3 according to the present invention;
FIG. 4 is a block diagram of step S4 according to the present invention;
FIG. 5 is a view showing the structure of a first press punch according to the present invention;
FIG. 6 is a block diagram of the die insert of the present invention;
FIG. 7 is a view showing the structure of a second type of extruding punch according to the present invention;
FIG. 8 is a structural view of the present invention with respect to a sheet self-forming rivet;
in the figure, the position of the upper end of the main shaft,
1. an upper die holder; 2. an upper base plate; 3. an upper fixing plate; 4. unloading a base plate; 5. a stripper plate; 6. a cavity plate; 7. a lower base plate; 8. a lower die holder; 9. putting a beating plate; 10. a lower striking plate; 11. a first extrusion punch; 12. an equal-height screw; 13. a stripper plate insert; 15. a limiting column; 16. positioning blocks; 17. positioning pins; 18. a stopper; 19. a buoyant lift block; 20. a transfer lever; 21. a second extrusion punch 211, a punch body 212 and a forming boss; 22. a concave die insert; 23. a material body; 24. a cavity; 25. and (4) riveting.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
As shown in fig. 1-8, a process for manufacturing a sheet self-forming rivet comprises the steps of:
the method comprises the following steps:
step S1: in the initial state, the mould is in the mould opening state, and a workpiece is placed on a floating block 19 of the mould and positioned;
step S2: the punching machine works, the die descends, the upper die base 1, the upper backing plate 2, the upper fixing plate 3, the discharging backing plate 4 and the discharging plate 5 start to descend, and the discharging plate insert 13 contacts with a workpiece firstly;
step S3: continuing descending, wherein the upper die base 1, the upper backing plate 2, the upper fixing plate 3, the discharging backing plate 4 and the discharging plate 5 are elastically connected, the buoyancy lifting block 19 is tightly attached to the lower backing plate 7, the buoyancy lifting block 19 descends by 5.0mm, the gap between the upper die and the lower die is 2.5mm, and the discharging plate 5 and the discharging plate insert 13 are tightly pressed on a workpiece;
step S4: when the slide block of the punch press machine tool continues to move downwards, the stroke is compressed until the upper die moves downwards to the bottom dead center of the machine tool, a part of material is extruded into a lower cavity by a first extrusion punch 11 with the diameter similar to that of a rivet, a conical cavity is formed above the material, after the extrusion forming of a workpiece is finished, the slide block of the punch press starts to move upwards after the punching operation is finished, and the workpiece taking is finished until the die returns to the top dead center;
step S5: and (5) continuously repeating the steps S1 to S4 by using the second extrusion punch 21, wherein the second extrusion punch 21 continuously extrudes the material downwards into the lower conical cavity, the material moves inwards firstly and then moves downwards, and finally, a rivet structure integrated with the material is formed on the surface of the material with the thickness of 2.5 mm.
In the present embodiment, it is preferable that the first extrusion punch 11 is a tapered punch matching the rivet diameter, and the second extrusion punch 21 is a positive extrusion punch.
With the structure, the extrusion punch 11 is made into a conical punch with the diameter similar to that of the rivet, the forming size of the extrusion punch is not required to be a single cylinder, and the extrusion punch is made into a cylinder material which is easier to diffuse towards the periphery rather than transfer towards the forming height direction of the rivet, so that the forming height of the rivet is more unreachable than that of the rivet;
A sheet metal self-forming rivet structure comprises a material body 23, a cavity 24 and a rivet 25, wherein one side of the material body 23 is provided with the rivet 25 formed in an integral manner through the manufacturing process of the sheet metal self-forming rivet according to the claim 1, and one side of the rivet 25, which is close to the material body 23, is provided with the cavity 24 formed through the process according to the claim 1.
A manufacturing die for a sheet self-forming rivet comprises an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die base 1, an upper padding plate 2, an upper fixing plate 3, a discharging padding plate 4 and a discharging plate 5 which are sequentially connected in parallel and elastically from top to bottom, and the upper die base 1, the upper padding plate 2 and the upper fixing plate 3 are sequentially fixed from top to bottom to form an upper half section which can move in time along with a press; the unloading backing plate 4 and the unloading plate 5 are fixed to form a buffer section;
a first extrusion punch 11 and a second extrusion punch 21 are arranged on different stations on the upper fixing plate 3, the first extrusion punch 11 is a conical punch, the second extrusion punch 21 comprises a punch body 211 and a forming boss 212, and the forming boss 212 is arranged on one side of the punch body 211 close to the lower die assembly;
the lower mould subassembly is located the mould subassembly under, lower mould subassembly from the top down includes: the die comprises a concave die plate 6, a lower backing plate 7 and a lower die holder 8, wherein the concave die plate 6, the lower backing plate 7 and the lower die holder 8 are fixedly arranged;
the female die plate 6 is provided with a floating block 19 corresponding to the first extrusion punch 11, a positioning pin 17, a stop block 18 and a positioning block 16 are arranged in the floating block 19, a transmission rod 20 penetrating through the lower die assembly is arranged below the floating block 19, a female die insert 22 is fixedly arranged on the lower backing plate 7 through an inner hexagonal screw, and the fillet at the inlet of the female die insert 22 is 0.2-0.3mm larger than that of a cold extrusion part; the die insert 22 has a significant impact on molding, the R fillet at the entrance should be 0.2 to 0.3 greater than the R fillet of the part to facilitate material flow, and the die insert cavity roughness ra0.1 to ra0.2 and coating to facilitate material flow and unloading.
In use, two forming processes are adopted, firstly, a part of material is extruded to a lower cavity by using a conical punch with the diameter similar to that of a rivet, secondly, the material is continuously extruded downwards to the lower cavity by using the punch with the slightly larger diameter through special design, and as a conical cavity is formed above the material after the first forming, the material can firstly move inwards and then move downwards during the second forming, so that the outward flowing amount of the material is reduced.
In this embodiment, preferably, a stripper plate insert 13 is arranged in the stripper plate 5, and the stripper plate insert 13 is sleeved outside the first extrusion punch 11.
By adopting the structure, the stripper plate insert 13 presses the workpiece in the descending process of the die, so that the plastic deformation of the blank around the extrusion process of the workpiece is prevented.
In this embodiment, preferably, the lower backing plate 7 is fixedly provided with a limiting column 15 through a hexagon socket head cap screw, and the positioning pin 17 is arranged corresponding to the reference hole of the positioning member.
Set up above-mentioned structure, prevent the excessive collision of mould assembly and lower mould subassembly through setting up of spacing post 15, play the guard action to product and mould, utilize locating pin 17 to play the positioning action to cold extrusion finished piece, improve the punching press precision.
In this embodiment, preferably, one end of the transmission rod 20, which is far away from the lower die assembly, is connected with an upper striking plate 9, one end of the upper striking plate 9, which is far away from the transmission rod 20, is provided with a lower striking plate 10 in parallel, and a discharge screw and a rectangular spring are installed between the upper striking plate 9 and the lower striking plate 10.
Set up above-mentioned structure, improve transmission efficiency, and play buffering and stable effect to the mould, improve life.
In the embodiment, the upper half section and the buffer section are preferably independent from each other, and the equal-height screws 12 and the rectangular springs are arranged between the discharging backing plate 5 and the upper die holder 1, the upper backing plate 2 and the upper fixing plate 3.
The structure is provided, and the equal-height screw 12 and the rectangular spring of the elastic element are installed to generate relative motion, so that the functions of stability and buffering are achieved.
The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of this patent application.
Claims (8)
1. The manufacturing process of the sheet self-forming rivet is characterized by comprising the following steps:
step S1: in the initial state, the mould is in a mould opening state, and a workpiece is placed on a floating block (19) of the mould and positioned;
step S2: the punching machine works, the die descends, the upper die base (1), the upper backing plate (2), the upper fixing plate (3), the discharging backing plate (4) and the discharging plate (5) start to descend, and the discharging plate insert (13) contacts with a workpiece firstly;
step S3: continuing descending, wherein the upper die base (1), the upper backing plate (2), the upper fixing plate (3), the discharging backing plate (4) and the discharging plate (5) are elastically connected, the buoyancy lifting block (19) is tightly attached to the lower backing plate (7), the buoyancy lifting block (19) descends by 5.0mm, the gap between the upper die and the lower die is 2.5mm, and the discharging plate (5) and the discharging plate insert (13) tightly press a workpiece;
step S4: when the slide block of the punch press machine tool continues to move downwards, the stroke is compressed until the upper die moves downwards to the bottom dead center of the machine tool, a part of material is extruded into a lower cavity by a first extrusion punch (11) with the diameter similar to that of the rivet, a conical cavity is formed above the material, after the extrusion forming of a workpiece is finished, the slide block of the punch press starts to move upwards after the punching operation is finished, and the workpiece taking is finished until the die returns to the top dead center;
step S5: and (3) continuously repeating the steps S1 to S4 by using a second extrusion punch (21), continuously extruding the material downwards into the lower conical cavity by using the second extrusion punch (21), moving the material inwards firstly and then downwards, and finally forming a rivet structure integrated with the material on the surface of the material with the thickness of 2.5 mm.
2. The process for manufacturing a sheet self-forming rivet according to claim 1, wherein: the first extrusion punch head (11) adopts a conical punch head matched with the diameter of the rivet, and the second extrusion punch head (21) adopts a positive extrusion forming punch head.
3. A sheet self-forming rivet structure is characterized by comprising a material body (23), a cavity (24) and a rivet (25), wherein the rivet (25) is integrally formed on one side of the material body (23) through the manufacturing process of the sheet self-forming rivet according to the claim 1, and the cavity (24) formed by the process according to the claim 1 is arranged on one side, close to the material body (23), of the rivet (25).
4. The manufacturing die for the sheet self-forming rivet is characterized by comprising an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die base (1), an upper base plate (2), an upper fixing plate (3), a discharging base plate (4) and a discharging plate (5) which are sequentially and parallelly and elastically connected from top to bottom, and the upper die base (1), the upper base plate (2) and the upper fixing plate (3) are sequentially fixed from top to bottom to form an upper half section which can move in time along with a press; the unloading base plate (4) and the unloading plate (5) are fixed to form a buffer section;
a first extrusion punch head (11) and a second extrusion punch head (21) are arranged on different stations on the upper fixing plate (3), the first extrusion punch head (11) adopts a conical punch head, the second extrusion punch head (21) comprises a punch head body (211) and a forming boss (212), and the forming boss (212) is arranged on one side, close to the lower die assembly, of the punch head body (211);
the lower mould subassembly is located the mould subassembly under, lower mould subassembly from the top down includes: the die comprises a concave die plate (6), a lower backing plate (7) and a lower die base (8), wherein the concave die plate (6), the lower backing plate (7) and the lower die base (8) are fixedly arranged;
the die plate (6) is provided with a floating block (19) corresponding to the first extrusion punch (11), a positioning pin (17), a stop block (18) and a positioning block (16) are arranged in the floating block (19), a transmission rod (20) penetrating through the lower die assembly is arranged below the floating block (19), a die insert (22) is fixedly mounted on the lower backing plate (7) through an inner hexagonal screw, and the fillet at the inlet of the die insert (22) is 0.2-0.3mm larger than that of a cold extrusion pressing piece.
5. The mold for manufacturing a sheet self-forming rivet according to claim 3, wherein: the novel extrusion punching die is characterized in that a stripper plate insert (13) is arranged in the stripper plate (5), and the stripper plate insert (13) is sleeved outside the first extrusion punching head (11).
6. The mold for manufacturing a sheet self-forming rivet according to claim 4, wherein: and the lower backing plate (7) is fixedly provided with a limiting column (15) through an inner hexagonal screw, and the positioning pin (17) is arranged corresponding to the datum hole of the positioning part.
7. The mold for manufacturing a sheet self-forming rivet according to claim 5, wherein: one end, far away from the lower mould subassembly, of the transfer rod (20) is connected with an upper knockout plate (9), one end, far away from the transfer rod (20), of the upper knockout plate (9) is parallelly provided with a lower knockout plate (10), and an unloading screw and a rectangular spring are arranged between the upper knockout plate (9) and the lower knockout plate (10).
8. The mold for manufacturing a sheet self-forming rivet according to claim 6, wherein: the upper half section and the buffer section are mutually independent, and equal-height screws (12) and rectangular springs are arranged among the discharging base plate (5), the upper die base (1), the upper base plate (2) and the upper fixing plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010740783.2A CN114054562A (en) | 2020-07-29 | 2020-07-29 | Manufacturing process, structure and manufacturing die of sheet self-forming rivet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010740783.2A CN114054562A (en) | 2020-07-29 | 2020-07-29 | Manufacturing process, structure and manufacturing die of sheet self-forming rivet |
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| Publication Number | Publication Date |
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| CN114054562A true CN114054562A (en) | 2022-02-18 |
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| CN202010740783.2A Pending CN114054562A (en) | 2020-07-29 | 2020-07-29 | Manufacturing process, structure and manufacturing die of sheet self-forming rivet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116441476A (en) * | 2023-06-16 | 2023-07-18 | 天津津荣天宇精密机械股份有限公司 | Forming die of half frame support of car blet C type |
-
2020
- 2020-07-29 CN CN202010740783.2A patent/CN114054562A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116441476A (en) * | 2023-06-16 | 2023-07-18 | 天津津荣天宇精密机械股份有限公司 | Forming die of half frame support of car blet C type |
| CN116441476B (en) * | 2023-06-16 | 2023-08-11 | 天津津荣天宇精密机械股份有限公司 | Forming die of half frame support of car blet C type |
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