Cold heading forming die of self-punching rivet
By designing a self-piercing rivet cold heading die, and utilizing the combination of a heavy-duty spring and a lower punch rod, effective die demolding was achieved, solving the problems of reduced forming quality and difficult separation caused by die wear, and improving production efficiency.
Patent Information
- Application Number
- CN202520020473.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-06
AI Technical Summary
After prolonged use, cold heading dies experience wear on the working parts, dulling of the punch, and deformation of the die cavity, resulting in a rough die surface that affects the quality of blank forming and separation, and is prone to jamming.
The cold heading die using self-piercing rivets achieves demolding through the compression of a heavy-duty spring in the main die pad and the sliding of the lower punch, in conjunction with the lower punch sleeve. The buffering and rebound force of the heavy-duty spring provides the power for demolding, and the lower punch separates from the self-piercing rivet body, allowing the rivet blank to be smoothly removed.
It effectively solves the problems of decreased molding quality and separation difficulties caused by mold wear, ensures that rivet blanks can be smoothly ejected, avoids equipment jamming, and improves production efficiency.
Smart Images
Figure CN223733756U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to cold heading forming die technical field, especially in kind of cold heading forming die of self -piercing rivet. BACKGROUND
[0002] Cold heading forming die is a kind of tool for metal cold heading forming process, it is usually composed of upper die and lower die, by the action of press, metal material is carried out cold heading forming in die, the size precision requirement of self -piercing rivet is higher, uses cold heading forming die processing, in practical application, cold heading forming die usually needs following technology:
[0003] 1, upper die part, stamping is carried out to raw material;
[0004] 2, lower die part, cooperate with punch, form raw material;
[0005] 3, ejection mechanism, after cold heading forming, the self -piercing rivet formed is ejected from the concave die;
[0006] Put the raw material handled into cold heading forming die, the die is usually composed of upper die and lower die, the shape of rivet is formed between upper die and lower die, by the pressure action of cold heading machine, raw material is carried out cold heading forming in die, and raw material gradually deforms into the shape of rivet.
[0007] After long time use, the working part of die can appear wear, punch dull, concave die cavity deformation and die surface become rough, which can affect the forming quality and separation effect of blank, rough surface can increase friction, make blank separation difficult, and can cause equipment to appear jamming failure. UTILITY MODEL CONTENTS
[0008] In view of the deficiencies of prior art, the utility model provides a kind of cold heading forming die of self -piercing rivet, solve long time use, the working part of die can appear wear, punch dull, concave die cavity deformation and die surface become rough, which can affect the forming quality and separation effect of blank, rough surface can increase friction, make blank separation difficult, and can cause equipment to appear jamming failure technical problem.
[0009] To realize above-mentioned purpose, the utility model is realized by the following technical schemes:
[0010] A kind of cold heading forming die of self -piercing rivet, including punch, main module, main die cushion block and baffle base, the side end of the main die cushion block is provided with the lower punch ejector rod that can horizontally slide, the side end of the main die cushion block is provided with the heavy load spring of spiral compression, the top of the baffle base is provided with the fixed cover plate that can be butt-jointed fixed, the top of the fixed cover plate is provided with the push spring that can be compressed, the top of the fixed cover plate is provided with the die front baffle that can vertically slide.
[0011] Preferably, the inside of the main mold pad is provided with a lower punch small sleeve that can be used for sliding friction, and a horizontally sliding lower punch rod is slidingly installed in the inside of the lower punch small sleeve
[0012] The side end of the fixed cover plate is provided with a slidingly installed limiting bolt, and the end of the limiting bolt is inserted into the inside of the fixed cover plate.
[0013] Preferably, the outside of the baffle base is rotationally installed with a butt-joint fixed fastening bolt, and the outside of the fixed cover plate is rotationally installed with a butt-joint fixed locking bolt.
[0014] The top end of the lower punch rod is provided with a self-punching rivet body for butt-joint installation.
[0015] The side end of the punch mold is horizontally aligned with the main mold block, and the top end of the front baffle is vertically aligned with the top end of the lower punch rod.
[0016] Compared with the prior art, the utility model has the following beneficial effects.
[0017] In the utility model, the heavy load spring in the main mold pad starts to compress, and then starts to rebound after the compression of the lower punch top rod, the heavy load spring plays a role of buffering and providing rebound force in the process, and prepares power for demolding, the lower punch rod slides to the inside of the main mold block, the end of the lower punch rod enters the inside of the lower punch small sleeve, and the lower punch rod and the self-punching rivet body are separated to realize the demolding effect, and the lower punch rod and the lower punch small sleeve cooperate to realize the demolding action, so that the rivet blank after processing is demolded from the mold.
[0018] In the utility model, the punch mold slides horizontally to retreat to one side, at this time, the material blocking structure starts to rise upward, this step prepares for the subsequent material pushing and demolding actions, the punch mold retreats to leave space, the material blocking structure rises to prepare for blocking the rivet blank, the lower punch top rod starts to push the self-punching rivet body cold upsetting blank to the left, and the lower punch top rod plays a role of pushing the rivet blank to move in a specific direction. BRIEF DESCRIPTION OF DRAWINGS
[0019] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and the content of the specification can be implemented, the following preferred embodiments of the utility model are described in detail with reference to the drawings.
[0020] Figure 1 It is a structure diagram of the punch mold of the utility model;
[0021] Figure 2 It is a structure diagram of the baffle base of the utility model;
[0022] Figure 3 It is the structure diagram of the material module of the utility model.
[0023] Figure 4 It is the structure diagram of the material module of the utility model.
[0024] Legend: 11, die; 12, self-punching rivet body; 13, main module; 14, lower punch rod; 15, lower punch small sleeve; 16, heavy load spring; 17, main module pad; 18, lower punch ejector rod; 19, baffle base; 21, fastening bolt; 22, locking bolt; 23, fixed cover plate; 24, push spring; 25, front die baffle; 26, limit bolt. DETAILED DESCRIPTION
[0025] The cold upsetting forming die of the self-punching rivet provided in the embodiment of the application effectively solves the technical problems that the working part of the die will be worn, the punch will be blunt, the concave die cavity will be deformed, and the surface of the die will become rough after long-time use, which will affect the forming quality and separation effect of the blank, the rough surface will increase the friction force, the blank will be difficult to separate, and the equipment will be prone to material jamming failure. The heavy load spring in the main module pad starts to compress, starts to rebound after the compression of the lower punch ejector rod, plays a role of buffering and providing rebound force in the process, prepares power for demolding, the lower punch rod slides into the interior of the main module, the end of the lower punch rod enters the interior of the lower punch small sleeve, and the lower punch rod and the self-punching rivet body are separated to realize the demolding effect, the lower punch rod and the lower punch small sleeve cooperate to realize the demolding action, and the rivet blank after processing is demolded from the die.
[0026] EMBODIMENT
[0027] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the technical scheme in the embodiment of the application effectively solves the technical problems that the working part of the die will be worn, the punch will be blunt, the concave die cavity will be deformed, and the surface of the die will become rough after long-time use, which will affect the forming quality and separation effect of the blank, the rough surface will increase the friction force, the blank will be difficult to separate, and the equipment will be prone to material jamming failure, and the overall idea is as follows:
[0028] In view of the problems in the prior art, the utility model provides a cold heading forming die of self -punching rivet, including punch 11, main module 13, main mould pad 17 and baffle base 19, the side end of main mould pad 17 is provided with the lower punch rod 18 of horizontal sliding, the side end of main mould pad 17 is provided with the heavy load spring 16 of spiral compression, the top of baffle base 19 is provided with the fixed cover plate 23 of butt joint fixed, the top of fixed cover plate 23 is provided with the push spring 24 of compression, the top of fixed cover plate 23 is provided with the die front baffle 25 of vertical sliding, drive die front baffle 25 moves, make die front baffle 25 can block self -punching rivet body 12, and die front baffle 25 blocks self -punching rivet body 12, ensure its correct position and carry out stripping operation;
[0029] The inside of main mould pad 17 is provided with the lower punch small sleeve 15 for sliding friction, the inside sliding installation of lower punch small sleeve 15 has the horizontal sliding lower punch rod 14, and the lower punch rod 14 is combined to realize stripping operation with main module 13 and lower punch small sleeve 15, and the lower punch small sleeve 15 is combined with the lower punch rod 14 to provide orientation and limit for the sliding of lower punch rod 14;
[0030] The side end of fixed cover plate 23 is provided with the limit pin 26 of sliding installation, the tail end of limit pin 26 is inserted into the inside of fixed cover plate 23, the outside of baffle base 19 is rotatably installed with the butt joint fixed fastening bolt 21, the outside of fixed cover plate 23 is rotatably installed with the butt joint fixed locking bolt 22, and the fastening bolt 21 and locking bolt 22 can be used to quickly combine and install fixed cover plate 23, which is convenient for disassembly and assembly in the later period;
[0031] The top of lower punch rod 14 is provided with the self -punching rivet body 12 for butt joint installation, and the self -punching rivet body 12 is blocked after being lifted, so that the rivet is operated in the fixed position subsequently;
[0032] The side end of punch 11 is aligned with main module 13 in the horizontal direction, and the top of die front baffle 25 is aligned with the top of lower punch rod 14 in the vertical direction, and the die front baffle 25 is used to butt joint and position the self -punching rivet body 12 in the later period.
[0033] Working principle:
[0034] The first step, the die 11 slides horizontally to one side and retreats, at this time the material blocking structure starts to rise upward, this step prepares for the subsequent pushing and demolding actions, the die 11 retreats to leave space, the material blocking structure rises to prepare to block the rivet blank, the lower punch rod 18 with the pushing structure starts to push the cold upsetting blank of the self-punching rivet body 12 to run to the left, the lower punch rod 18 plays the role of pushing the rivet blank to move in a specific direction, the lower punch rod 18 slides to the inside of the main die pad 17, the top end of the lower punch rod 18 stops moving after being connected with the inside of the main die pad 17, at the same time, the baffle base 19 moves upward, the front die baffle 25 continues to run until it blocks the self-punching rivet body 12, the main die pad 17 provides sliding support and positioning for the lower punch rod 18, the front die baffle 25 blocks the rivet blank to ensure that it is in a fixed position for subsequent operations, when the material blocking structure blocks the self-punching rivet body 12, the heavy load spring 16 in the inside of the main die pad 17 starts to compress, after being compressed by the lower punch rod 18, it starts to rebound, the heavy load spring 16 plays the role of buffering and providing rebound force in this process, and prepares power for demolding, the lower punch rod 14 slides to the inside of the main die block 13, the end of the lower punch rod 14 enters the inside of the lower small sleeve 15, at the same time, the lower punch rod 14 and the self-punching rivet body 12 are separated to realize the demolding effect, the lower punch rod 14 and the lower small sleeve 15 cooperate to realize the demolding action, so that the processed rivet blank is demolded from the die.
[0035] Finally, it should be noted that: obviously, the above embodiments are only examples for clearly illustrating the utility model, and are not limited to the implementation mode. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the implementation modes. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.
Claims
1. A cold heading forming die for a self-piercing rivet comprising a punch (11), a main die block (13), a main die pad (17) and a baffle base (19), characterized in that, The side end of the main mold pad (17) is provided with a lower punch rod (18) that can slide horizontally, the side end of the main mold pad (17) is provided with a heavy load spring (16) that can be compressed spirally, the top end of the baffle base (19) is provided with a fixed cover plate (23) that can be fixed in abutment, the top end of the fixed cover plate (23) is provided with a push-out spring (24) that can be compressed, and the top end of the fixed cover plate (23) is provided with a front mold baffle (25) that can slide vertically.
2. A cold-upsetting forming die for a self-piercing rivet as defined in claim 1, characterized in that The inside of the main mold pad (17) is provided with a lower punch small sleeve (15) that can be used for sliding friction, and the inside of the lower punch small sleeve (15) is slidingly installed with a lower punch rod (14) that can slide horizontally.
3. A cold-upsetting forming die for a self-piercing rivet as defined in claim 1, characterized in that, The side end of the fixed cover plate (23) is provided with a limit bolt (26) that is slidingly installed, and the end of the limit bolt (26) is inserted into the inside of the fixed cover plate (23).
4. A cold-upsetting forming die for a self-piercing rivet as defined in claim 1, characterized in that, The outside of the baffle base (19) is rotatably installed with a fastening bolt (21) that is fixed in abutment, and the outside of the fixed cover plate (23) is rotatably installed with a locking bolt (22) that is fixed in abutment.
5. A cold-upsetting forming die for self-piercing rivets as claimed in claim 2, characterized in that, The top end of the lower punch rod (14) is provided with a self-punch rivet body (12) for abutment installation.
6. A cold-upsetting forming die for self-piercing rivets as claimed in claim 1, characterized in that, The side end of the punch mold (11) is horizontally aligned with the main mold block (13), and the top end of the front mold baffle (25) is vertically aligned with the top end of the lower punch rod (14).