Cold heading forming module of bolt pin structural component
By designing the cold heading forming module of pin pin structural parts, the problems of high production costs and long cycles caused by traditional processing methods are solved, and high-precision forming and structural strength are achieved, which is suitable for mass production.
Patent Information
- Application Number
- CN202323561087.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2033-12-26
AI Technical Summary
Traditional machining or the combination of cold heading and machining leads to high production costs and long cycles, making it difficult to ensure product structural strength and molding accuracy.
A cold heading forming module for pin-stud structural parts is designed, including a crude embryo cold heading mold, a cut-side cold heading mold and a finished cold heading mold. Through the combination of combined molds, combined continuous cold heading molds can be achieved.
It achieves high-precision molding, shortens the processing cycle, improves the structural strength and production efficiency of the product, is suitable for batch cold heading production, and has high economic value.
Smart Images
Figure CN222569157U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a cold heading forming die set for a pin bolt structural part, belonging to the technical field of cold heading dies. Background Art
[0002] Cold upsetting is a forging method that uses a die to upset (usually partially upset) a metal bar at room temperature. It is usually used to make the heads of screws, bolts, rivets, etc. It can reduce or replace cutting processing.
[0003] There is currently a pin bolt structure, which includes a pin column and a bolt head, a connecting ring is provided between the bolt head and the pin column, the bolt head has two opposite first cut sections, and the connecting ring is provided with two second cut sections corresponding to the first cut sections one by one, and its structure is relatively complex.
[0004] In traditional processes, machining is generally used, which has many cutting steps and a large amount of cutting, making it difficult to guarantee processing costs and product structural strength. In order to reduce costs and improve product quality, cold heading is used to perform rough cold heading of pins and bolt heads. After cold heading, machining and fine milling are performed. The combination of machining and cold heading can ensure product quality, but the molding cycle is long, which undoubtedly increases production costs. Utility Model Content
[0005] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art, and to propose a cold heading forming module for pin bolt structural parts in view of the problems of high production cost and long cycle caused by traditional machining or the combination of cold heading and machining.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] A cold heading forming die set for a pin bolt structure, the pin bolt structure comprises a pin column and a bolt head, a connecting ring is arranged between the bolt head and the pin column, the bolt head has two opposite first cut-away portions, and the connecting ring is provided with two second cut-away portions arranged one-to-one corresponding to the first cut-away portions.
[0008] The cold heading forming module comprises a rough blank cold heading die for forming the pin and the bolt head, a cut surface ring cold heading die for forming the first cut surface and the connecting ring, and a finished product cold heading die for forming the second cut surface.
[0009] The rough blank cold heading die comprises a rough blank cold heading bottom die seat and a rough blank cold heading top die seat with a punching stroke toward the rough blank cold heading bottom die, a rough blank forming cavity and a pin forming ejector located at the bottom of the rough blank forming cavity are provided in the rough blank cold heading bottom die, and a bolt head forming ejector used for bolt head forming is provided on the rough blank cold heading top die seat;
[0010] The faceted ring stage cold heading die comprises a faceted ring stage bottom die seat and a faceted ring stage top die seat facing the faceted ring stage bottom die seat, a pin column positioning cavity for carrying the pin column is provided in the faceted ring stage bottom die seat, a bolt head positioning cavity and a faceted ring stage punching block with a punching stroke located in the bolt head positioning cavity are provided on the faceted ring stage top die seat, and two first faceted section forming parts for forming the first faceted section are provided on the faceted ring stage punching block;
[0011] The finished cold heading die comprises a finished cold heading bottom die seat and a finished cold heading top die seat having a punching stroke toward the finished cold heading bottom die seat, the finished cold heading bottom die seat is provided with a pin locking cavity for carrying the pin, the finished cold heading top die seat is provided with a cutting knife seat, the cutting knife seat is provided with a bolt head channel for cooperating with the bolt head, and a second section forming cutting blade for forming the second section portion.
[0012] Preferably, the cold heading forming module comprises a section ring stage transition cold heading die arranged between the rough blank cold heading die and the section ring stage cold heading die.
[0013] The section ring stage transition cold heading die comprises a transition cold heading bottom die seat and a transition cold heading top die seat with a punching stroke toward the transition cold heading bottom die seat, a transition pin positioning cavity for carrying the pin is provided in the transition cold heading bottom die seat, a transition bolt head positioning cavity and a transition punching block with a punching stroke located in the transition bolt head positioning cavity are provided on the transition cold heading top die seat, two first section section transition forming portions for transition forming of the first section section are provided on the transition punching block, and any of the first section section transition forming portions is provided with a transition forming end for transition forming of the connecting ring stage.
[0014] Preferably, the cold heading forming module comprises a first section preforming cold heading die arranged between the rough blank cold heading die and the section ring stage transition cold heading die,
[0015] The first section preforming cold heading die comprises a preforming cold heading bottom die seat and a preforming cold heading top die seat having a punching stroke toward the preforming cold heading bottom die seat,
[0016] The preforming cold forging bottom die seat is provided with a preforming positioning cavity for carrying the pin, the preforming cold forging top die seat is provided with a preforming bolt head positioning cavity, and a preforming punch block with a punching stroke located in the preforming bolt head positioning cavity, and the preforming punch block is provided with two preforming ends for preforming the first cut surface portion.
[0017] Preferably, the cold heading forming module comprises a shaft material supply die, the shaft material supply die comprises a shaft material supply base having a shaft material supply channel and a cutting ring seat having a shaft material loading channel, and the cutting ring seat has horizontal displacement.
[0018] Preferably, the cold heading forming module comprises a pin preforming cold heading die arranged between the shaft material supply die and the rough blank cold heading die.
[0019] The pin preforming cold heading die comprises a pin preforming cold heading bottom die seat and a pin preforming cold heading top die seat having a punching stroke toward the pin preforming cold heading bottom die seat.
[0020] The pin preforming cold heading bottom die seat is provided with a preforming cavity, the preforming cavity is provided with a preforming cone for preforming the pin, and the pin preforming cold heading top die seat is provided with a preforming cold heading top rod for probing into the preforming cavity.
[0021] Preferably, a transition platform is provided on the pin, a transition platform forming portion for forming the transition platform is provided in the pin positioning cavity, and a secondary forming portion for forming the transition platform is provided in the pin locking cavity.
[0022] The beneficial effects of the utility model are mainly reflected in:
[0023] 1. It can meet the combined continuous cold heading forming of pin bolt structural parts, and can meet the high-precision forming requirements without processing. The product production efficiency is high and the product structural strength is greatly improved.
[0024] 2. The combined mold design is ingenious, the targeted extrusion deformation gradient changes evenly, and the product molding accuracy is guaranteed.
[0025] 3. Suitable for batch cold heading production and has high economic value. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:
[0027] Figure 1 The utility model is a schematic diagram of the overall structure of a cold heading forming module for a pin bolt structural member.
[0028] Figure 2 It is a structural schematic diagram of a rough blank cold heading die of the utility model.
[0029] Figure 3 It is a structural schematic diagram of a cold heading die for a middle section ring table of the utility model.
[0030] Figure 4It is a structural schematic diagram of a finished product cold heading die in the utility model.
[0031] Figure 5 It is a structural schematic diagram of a section ring transition cold heading die of the utility model.
[0032] Figure 6 It is a structural schematic diagram of the first section preforming cold heading die in the utility model.
[0033] Figure 7 It is a structural schematic diagram of the shaft material supply mold in the utility model.
[0034] Figure 8 It is a structural schematic diagram of a pin preforming cold heading die in the utility model.
[0035] Fig. 9 The utility model is a schematic diagram of the forming structure of a pin bolt structural part in a cold heading forming module of the pin bolt structural part. DETAILED DESCRIPTION
[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0037] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the relevant utility model are shown in the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0038] The utility model provides a cold forging forming die set for a pin bolt structural part, such as Fig. 9 As shown, the pin bolt structure includes a pin column 100 and a bolt head 200, a connecting ring 300 is provided between the bolt head 200 and the pin column 100, the bolt head has two opposite first section portions 210, and the connecting ring 300 is provided with two second section portions 310 which are arranged one-to-one corresponding to the first section portions.
[0039] The traditional processing method uses direct machining of shaft materials, which requires milling of the pins and then milling of the sections. The cutting workload is large and material is wasted, and the structural strength of the product is difficult to ensure. To address this situation, the existing technology first performs rough cold heading of the pins and bolt heads, and then performs machining and milling, which has a relatively long processing cycle.
[0040] In view of this situation, this case proposes the following Figures 1 to 8 The cold heading forming module shown includes a rough blank cold heading die 1 for forming pins and bolt heads, a cut surface ring platform cold heading die 2 for forming the first cut surface portion and the connecting ring platform, and a finished product cold heading die 3 for forming the second cut surface portion.
[0041] like Figure 1 and Figure 2 As shown, the rough blank cold heading die 1 includes a rough blank cold heading bottom die seat 11 and a rough blank cold heading top die seat 12 having a punching stroke toward the rough blank cold heading bottom die, a rough blank forming cavity 111 and a pin forming ejector pin 112 located at the bottom of the rough blank forming cavity 111 are provided in the rough blank cold heading bottom die 11, and a bolt head forming ejector pin 121 for bolt head forming is provided on the rough blank cold heading top die seat 12.
[0042] Specifically, the rough blank cold heading die 1 belongs to the prior art, that is, the shaft material 400 is placed in the rough blank forming cavity 111, and the cold heading is achieved by the bolt head forming ejector 121. Fig. 9 The forming of the medium rough blank 500 will not be described in detail here.
[0043] like Figure 1 and Figure 3 As shown, the facet ring stage cold heading die 2 includes a facet ring stage bottom die seat 21 and a facet ring stage top die seat 22 facing the facet ring stage bottom die seat, a pin positioning cavity 211 for carrying a pin is provided in the facet ring stage bottom die seat 21, a bolt head positioning cavity 221 and a facet ring stage stamping block 222 with a stamping stroke located in the bolt head positioning cavity are provided on the facet ring stage top die seat 22, and two first facet section forming portions 2220 for forming the first facet section are provided on the facet ring stage stamping block 222.
[0044] Specifically, when the facet ring stage is formed, the rough blank is placed in the pin positioning cavity 211, and its bolt head is located in the bolt head positioning cavity 221. At this time, the facet ring stage stamping block 222 is moved downward, so that the first facet portion is squeezed out on the bolt head through the first facet portion forming part 2220, thereby meeting the forming requirements of the connecting ring stage 300.
[0045] like Figure 1 and Figure 4As shown, the finished cold heading mold 3 includes a finished cold heading bottom die seat 31 and a finished cold heading top die seat 32 having a punching stroke toward the finished cold heading bottom die seat, a pin locking cavity 311 for carrying a pin is provided in the finished cold heading bottom die seat, a cutting tool seat 321 is provided on the finished cold heading top die seat, and a bolt head channel 3211 for cooperating with a bolt head and a second section forming cutting edge 3212 for forming a second section portion are provided in the cutting tool seat 321.
[0046] Specifically, when the second cut surface is formed, the workpiece is positioned and mounted through the pin locking cavity 311, and is high-precision aligned and guided through the bolt head channel 3211. At this time, the second cut surface forming cutting edge 3212 is squeezed to form the second cut surface.
[0047] In this way, the combination of the rough blank cold heading die 1, the cut surface ring cold heading die 2, and the finished product cold heading die 3 can meet the sequential cold heading forming requirements of the pin bolt structural parts, shorten the processing cycle, and control the product quality.
[0048] In a specific embodiment, Figure 1 and Figure 5 As shown, the cold heading forming module group includes a cut surface ring stage transition cold heading die 4 arranged between the rough blank cold heading die and the cut surface ring stage cold heading die.
[0049] The section ring stage transition cold heading die comprises a transition cold heading bottom die seat 41 and a transition cold heading top die seat 42 having a punching stroke toward the transition cold heading bottom die seat, a transition pin positioning cavity 411 for carrying a pin is provided in the transition cold heading bottom die seat 41, a transition bolt head positioning cavity 421 and a transition punch block 422 with a punching stroke located in the transition bolt head positioning cavity are provided on the transition cold heading top die seat 42, two first section section transition forming portions 4221 for transition forming of the first section section are provided on the transition punch block 422, and any first section section transition forming portion is provided with a transition forming end 4222 for connecting the ring stage transition forming.
[0050] Specifically, when the first cut surface 210 and the connecting ring 300 are directly extruded and cold headed, the deformation will be relatively large. In order to make the transition smoother, a cut surface and ring transition cold head die is used.
[0051] During the transition cold heading process, when the first section 210 is extruded, it is not necessary to perform cold heading in place at one time. The first section transition forming part 4221 forms a deformation transition amount between 1 / 2 and 1 / 5, and during its deformation process, the transition forming end 4222 is used for associated cooperation. The transition forming end 4222 is generally designed with a wedge structure, and other structures that can achieve extrusion forming can also be used. In this way, the extrusion deformation amount is reduced in steps, and the quality of cold heading forming is more reliable.
[0052] In a specific embodiment, Figure 1 and Figure 6 As shown, the cold heading forming module group includes a first section preforming cold heading die 5 arranged between a rough blank cold heading die and a section ring stage transition cold heading die.
[0053] The first cutting surface preforming cold heading die comprises a preforming cold heading bottom die seat 51 and a preforming cold heading top die seat 52 having a punching stroke toward the preforming cold heading bottom die seat.
[0054] A preforming positioning cavity 511 for carrying a pin is provided in the preforming cold forging bottom die seat 51, a preforming bolt head positioning cavity 521 and a preforming punch block 522 with a punching stroke located in the preforming bolt head positioning cavity are provided on the preforming cold forging top die seat, and two preforming ends 5220 for preforming the first cut surface are provided on the preforming punch block.
[0055] The specific implementation process and principle are described. The deformation of the first section portion during one-time forming is also relatively large. A certain preforming transition can be achieved through the preforming end 5220. The preforming end 5220 is similar in structure to the transition forming end 4222. It is a wedge-shaped extrusion structure used to extrude into the material, and the forming accuracy can be controlled in steps.
[0056] In a specific embodiment, Figure 1 and Figure 7 As shown, the cold heading forming module includes an axle material supplying die 6, which includes an axle material supplying base 61 having an axle material supplying channel and a cutting ring seat 62 having an axle material loading channel, and the cutting ring seat has horizontal displacement.
[0057] The shaft material supply mold 6 belongs to the prior art, that is, it is used to cut the material shaft into shaft materials 400, and its structure and operation are not described in detail here.
[0058] In a specific embodiment, Figure 1 and Figure 8 As shown, the cold heading forming module assembly includes a pin preforming cold heading die 7 arranged between the shaft material supply die and the rough blank cold heading die.
[0059] The pin preforming cold heading die comprises a pin preforming cold heading bottom die seat 71 and a pin preforming cold heading top die seat 72 having a punching stroke toward the pin preforming cold heading bottom die seat.
[0060] A preforming cavity 711 is provided in the pin preforming cold heading bottom die seat, a preforming cone 7110 for pin preforming is provided in the preforming cavity, and a preforming cold heading top rod 720 for probing into the preforming cavity is provided on the pin preforming cold heading top die seat.
[0061] That is, the pin preforming cold heading die 7 is combined with the rough blank cold heading die 1, so that the phase variable of the rough blank 500 is more reliable and the rough blank forming accuracy is better.
[0062] In a specific embodiment, Figure 1 , Figure 3 and Figure 4 As shown, a transition platform 110 is provided on the pin 100, a transition platform forming portion 2110 for forming the transition platform is provided in the pin positioning cavity 211, and a secondary forming portion 3110 for forming the transition platform is provided in the pin locking cavity 311.
[0063] That is, the transition stage forming part 2110 and the secondary shaping part 3110 are used to form the transition stage 110 in their respective cold heading dies, and the forming does not require the aid of other cold heading dies, which meets the forming accuracy requirements.
[0064] From the above description, it can be found that the cold forging forming module of the pin bolt structural part of the utility model can meet the combined continuous cold forging forming of the pin bolt structural part, and can meet the high-precision forming requirements without processing. The product production efficiency is high and the product structural strength is greatly improved. The combined mold is cleverly designed, the gradient of the targeted extrusion deformation changes evenly, and the product forming accuracy is guaranteed. It is suitable for batch cold forging production and has high economic value.
[0065] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.
[0066] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. A cold heading forming die set for a pin bolt structure, the pin bolt structure comprising a pin column and a bolt head, a connecting ring platform is arranged between the bolt head and the pin column, the bolt head has two opposite first cut-away portions, and the connecting ring platform is provided with two second cut-away portions arranged one-to-one corresponding to the first cut-away portions, characterized in that: The cold heading forming module comprises a rough blank cold heading die for forming the pin and the bolt head, a cut surface ring cold heading die for forming the first cut surface and the connecting ring, and a finished product cold heading die for forming the second cut surface. The rough blank cold heading die comprises a rough blank cold heading bottom die seat and a rough blank cold heading top die seat with a punching stroke toward the rough blank cold heading bottom die seat, a rough blank forming cavity and a pin forming ejector located at the bottom of the rough blank forming cavity are provided in the rough blank cold heading bottom die, and a bolt head forming ejector used for bolt head forming is provided on the rough blank cold heading top die seat; The faceted ring stage cold heading die comprises a faceted ring stage bottom die seat and a faceted ring stage top die seat facing the faceted ring stage bottom die seat, a pin column positioning cavity for carrying the pin column is provided in the faceted ring stage bottom die seat, a bolt head positioning cavity and a faceted ring stage punching block with a punching stroke located in the bolt head positioning cavity are provided on the faceted ring stage top die seat, and two first faceted section forming parts for forming the first faceted section are provided on the faceted ring stage punching block; The finished cold heading die comprises a finished cold heading bottom die seat and a finished cold heading top die seat having a punching stroke toward the finished cold heading bottom die seat, the finished cold heading bottom die seat is provided with a pin locking cavity for carrying the pin, the finished cold heading top die seat is provided with a cutting knife seat, the cutting knife seat is provided with a bolt head channel for cooperating with the bolt head, and a second section forming cutting blade for forming the second section portion.
2. According to claim 1, a cold heading forming die set for a pin structure, characterized in that: The cold heading forming module comprises a section ring stage transition cold heading die arranged between the rough blank cold heading die and the section ring stage cold heading die. The section ring stage transition cold heading die comprises a transition cold heading bottom die seat and a transition cold heading top die seat with a punching stroke toward the transition cold heading bottom die seat, a transition pin positioning cavity for carrying the pin is provided in the transition cold heading bottom die seat, a transition bolt head positioning cavity and a transition punching block with a punching stroke located in the transition bolt head positioning cavity are provided on the transition cold heading top die seat, two first section section transition forming portions for transition forming of the first section section are provided on the transition punching block, and any of the first section section transition forming portions is provided with a transition forming end for transition forming of the connecting ring stage.
3. According to the cold heading forming die set of the pin structure member of claim 2, it is characterized in that: The cold heading forming module group includes a first section preforming cold heading die arranged between the rough blank cold heading die and the section ring stage transition cold heading die, The first section preforming cold heading die comprises a preforming cold heading bottom die seat and a preforming cold heading top die seat having a punching stroke toward the preforming cold heading bottom die seat, The preforming cold forging bottom die seat is provided with a preforming positioning cavity for carrying the pin, the preforming cold forging top die seat is provided with a preforming bolt head positioning cavity, and a preforming punch block with a punching stroke located in the preforming bolt head positioning cavity, and the preforming punch block is provided with two preforming ends for preforming the first cut surface portion.
4. According to the cold heading forming die set of the pin structure member of claim 1, it is characterized in that: The cold heading forming module comprises a shaft material supplying die, and the shaft material supplying die comprises a shaft material supplying base provided with a shaft material supplying channel and a cutting ring seat provided with a shaft material loading channel, and the cutting ring seat has horizontal displacement.
5. The cold heading forming die set for a pin structure according to claim 4, characterized in that: The cold heading forming module group includes a pin preforming cold heading die arranged between the shaft material supply die and the rough blank cold heading die. The pin preforming cold heading die comprises a pin preforming cold heading bottom die seat and a pin preforming cold heading top die seat having a punching stroke toward the pin preforming cold heading bottom die seat. The pin preforming cold heading bottom die seat is provided with a preforming cavity, the preforming cavity is provided with a preforming cone for preforming the pin, and the pin preforming cold heading top die seat is provided with a preforming cold heading top rod for probing into the preforming cavity.
6. The cold heading forming die set for a pin structure according to claim 1, characterized in that: A transition platform is arranged on the pin, a transition platform forming part for forming the transition platform is arranged in the pin positioning cavity, and a secondary forming part for forming the transition platform is arranged in the pin locking cavity.