Cold forging trimming die for triangular flange shaft sleeve
By designing a cold forging edge cutting mold for triangular flange flange sleeves, the nitrogen spring links the presser and the edge cutting punch, the problem of deformation of the forging during the hot edge cutting process is solved, and an efficient and stable edge cutting process and an improved yield is achieved.
Patent Information
- Application Number
- CN202421301904.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-07
AI Technical Summary
The triangular flange flange sleeve is prone to deformation during the hot cutting process, resulting in about 30% of the forgings being scrapped, and the prior art is difficult to effectively solve this problem.
A cold forged edge cutting mold for triangular flange flange sleeve is designed, and a nitrogen spring is used to link the presser to make the presser and the cutting punch move relative to each other. The force provided by the nitrogen spring makes the forging fly on the lower cutting mold, and slide out of the mold directly through the cut channel and the chute channel.
It effectively reduces the deformation of the forging during the cutting process, improves the yield of the product, simplifies the mold output process of the forging, improves the working efficiency, and solves the problem of the edge cutting ring sticking to the punch.
Smart Images
Figure CN222607710U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of molds, in particular to a cold forging trimming mold for a triangular flange sleeve. Background Art
[0002] The triangular flange sleeve is one of the important parts of the automobile transmission system. It is usually made by hot die forging process: upsetting, pre-forging, forming, punching, trimming. Due to the significant asymmetry of the cross-sectional structure of the triangular flange sleeve and the thinness of the flange, the shear force during the hot trimming process causes the bottom of the forging flange to be easily deformed. In the actual production process, about 30% of the forgings are scrapped due to deformation. In order to reduce the scrap rate of products after hot die forging, the forging forming process is adjusted and the hot forging + cold cutting flash process is used for manufacturing.
[0003] Therefore, it is necessary to provide a new technical solution. Utility Model Content
[0004] In order to solve the technical problems existing in the prior art, the utility model discloses a cold forging trimming die for a triangular flange sleeve, and the specific technical scheme is as follows:
[0005] The utility model provides a cold forging trimming die for a triangular flange sleeve, comprising an upper die and a lower die, wherein the upper die comprises an upper die plate, an upper die sleeve, a fixing plate, an elastic device, a trimming punch and a press.
[0006] The upper mold sleeve is fixed to the bottom of the upper mold plate.
[0007] The fixing plate is arranged in the mold cavity of the upper mold sleeve and contacts the bottom of the upper mold plate.
[0008] The trimming punch is arranged in the die cavity of the upper die sleeve and is fixedly connected with the upper die sleeve. The top of the trimming punch contacts the fixing plate, and the lower end of the trimming punch extends out of the upper die sleeve.
[0009] One end of the elastic device is fixed to the fixed plate, and the other end of the elastic device extends out of the upper die sleeve and is connected to the presser.
[0010] The presser is movably sleeved on the portion of the trimming punch extending out of the upper die sleeve, and the bottom shape of the presser matches the top edge shape of the forging.
[0011] When the trimming punch descends, the presser first presses on the edge of the forging, and the trimming punch continues to descend until the top of the presser contacts the bottom of the upper die sleeve and presses the forging tightly, and the trimming punch continues to descend to squeeze the forging downward until it is separated from the flash.
[0012] Furthermore, the lower die includes a lower die plate, a lower die sleeve, a trimming lower die, a pressing plate and a pressure block.
[0013] The lower mold sleeve is fixed on the top of the lower mold plate.
[0014] The trimming lower die is fixed to the top of the lower die sleeve through the pressing plate, and the die cavity of the trimming lower die is connected to the die cavity of the lower die sleeve.
[0015] The pressure block is arranged in the mold cavity of the lower mold sleeve below the trimming lower mold, and the top of the pressure block is in contact with the bottom of the trimming lower mold.
[0016] Furthermore, a raised step is provided on the side wall of the trimming punch and is clamped and fixed to the upper die sleeve.
[0017] Furthermore, the upper mold sleeve includes an outer sleeve and an inner sleeve, the outer sleeve is arranged on the outside of the inner sleeve, the top of the inner sleeve is in contact with the fixed plate, the bottom of the inner sleeve is lower than the bottom of the outer sleeve, and the outer side of the bottom of the inner sleeve is provided with a step and is fixed to the outer sleeve by a cap.
[0018] Furthermore, the bottom of the inner sleeve and the top of the press are in matching planar shapes.
[0019] Furthermore, the elastic device and the trimming punch are arranged in the mold cavity of the inner sleeve, and three elastic devices are provided and are evenly arranged along the circumferential direction.
[0020] Furthermore, the elastic device is a nitrogen spring.
[0021] Furthermore, a feed channel connected to the trimming lower die cavity is provided in the center of the pressure block, a downward inclined slide channel is provided at the lower part of the pressure block, the top of the slide channel is connected to the bottom of the feed channel, and the slide channel passes through to the outside of the lower die sleeve.
[0022] Further, the pressure block includes a first pressure block and a second pressure block, the top of the first pressure block contacts the bottom of the trimming lower mold, the top of the second pressure block contacts the bottom of the first pressure block, and the bottom of the second pressure block contacts the lower mold plate,
[0023] A material discharge channel is arranged at the center of the first pressure block, the top of the second pressure block is arranged as a downwardly inclined structure, the lower part of the first pressure block is arranged with an inclined surface parallel to the top of the second pressure block, and the inclined surface and the second pressure block form a slide channel.
[0024] The utility model has the following beneficial effects:
[0025] 1. The cold forging trimming die of the triangular flange sleeve provided by the utility model uses a nitrogen spring to connect the presser, so that the presser can move relative to the trimming punch. When the forging is trimmed, the presser uses the force provided by the nitrogen spring to keep the flash of the forging always on the trimming lower die.
[0026] 2. The cold forging trimming die of the triangular flange sleeve provided by the utility model can directly slide out of the die through the feeding channel and the chute channel, which saves time and labor and improves work efficiency.
[0027] 3. The cold forging trimming die of the triangular flange sleeve provided by the utility model can realize that the presser can always press the flash of the forging before and after trimming under the action of the nitrogen spring, so that the position of the forging and the trimming lower die can be fixed during trimming, and the problem of slanting material during trimming will not occur due to uneven shear force caused by the asymmetry of the forging.
[0028] 4. The cold forging trimming die of the triangular flange sleeve provided by the utility model can perform relative movement between the presser and the trimming punch after the forging is trimmed. While the punch is returning, the presser still acts on the flash ring to complete the separation of the flash and the trimming punch, thereby solving the problem of the trimming ring sticking to the punch.
[0029] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0031] Figure 1 The utility model is a schematic diagram of the assembly structure of a cold forging trimming die for a triangular flange sleeve provided in one embodiment.
[0032] Figure 2 yes Figure 1 Schematic diagram of the structure of the fixed plate.
[0033] Figure 3 yes Figure 1 Schematic diagram of the top view of the middle and upper mold sleeve.
[0034] Figure 4 yes Figure 1 Schematic diagram of the structure of the center trimming punch.
[0035] Figure 5 yes Figure 1 Schematic diagram of the structure of the medium press feeder.
[0036] Figure 6 yes Figure 1 Schematic diagram of the structure of the middle trimming lower die. DETAILED DESCRIPTION
[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.
[0039] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0040] The utility model discloses a cold forging trimming die for a triangular flange sleeve. Figures 1 to 6, comprising an upper die 1 and a lower die 2, wherein the upper die comprises an upper die plate 11, an upper die sleeve 12, a fixing plate 13, an elastic device 14, a trimming punch 15 and a press 16. The upper die sleeve 12 is fixed to the bottom of the upper die plate 11, the fixing plate 13 is arranged in the die cavity of the upper die sleeve 12 and contacts the bottom of the upper die plate 11, the trimming punch 15 is arranged in the die cavity of the upper die sleeve 12 and is clamped and fixed to the upper die sleeve 12, the top of the trimming punch 15 contacts the fixing plate 13, the lower end of the trimming punch 15 extends out of the upper die sleeve 12, one end of the elastic device 14 is fixed to the fixing plate 13, the other end of the elastic device 14 extends out of the upper die sleeve 12 and is connected to the press 16, the press 16 is movably sleeved on the portion of the trimming punch 15 extending out of the upper die sleeve 12, and the bottom shape of the press 16 matches the top edge shape of the forging. When the trimming punch 15 descends, the presser 16 first presses on the edge of the forging, and the trimming punch 15 continues to descend until the top of the presser 16 contacts the bottom of the upper die sleeve 12 and presses the forging, and the trimming punch 15 continues to descend to squeeze the forging downward until it is separated from the flash.
[0041] The lower die 2 comprises a lower die plate 21, a lower die sleeve 22, a trimming lower die 23, a pressing plate 24 and a pressure block 25. The lower die sleeve 22 is fixed to the top of the lower die plate 21, the trimming lower die 23 is fixed to the top of the lower die sleeve 22 through the pressing plate 24, the die cavity of the trimming lower die 23 is connected to the die cavity of the lower die sleeve 22, the pressure block 25 is arranged in the die cavity of the lower die sleeve 22 below the trimming lower die 23, and the top of the pressure block 25 is in contact with the bottom of the trimming lower die 23.
[0042] The side wall of the trimming punch 15 is provided with a raised step which is clamped and fixed to the upper die sleeve 12 .
[0043] In one embodiment, the upper mold sleeve 12 includes an outer sleeve 121 and an inner sleeve 122, the outer sleeve 121 is sleeved on the outside of the inner sleeve 122, the top of the inner sleeve 122 is in contact with the fixed plate 13, the bottom of the inner sleeve 122 is lower than the bottom of the outer sleeve 121, and the outer side of the bottom of the inner sleeve 122 is provided with a step and is fixed to the outer sleeve 121 through a cap.
[0044] In one embodiment, the bottom of the inner sleeve 122 and the top of the press 16 are matching planar shapes.
[0045] In one embodiment, the elastic device 14 and the trimming punch 15 are arranged in the mold cavity of the inner sleeve 122, and the elastic device 14 is provided with three and is evenly arranged along the circumferential direction. Figure 2A schematic structural diagram of the fixing plate 13 , wherein the fixing plate 13 is connected to the elastic device 14 via the strip grooves thereon.
[0046] The elastic device 14 is a nitrogen spring, which can better control the stroke position of the presser 16.
[0047] In one embodiment, a feed channel 251 connected to the cavity of the trimming lower die 23 is provided in the center of the pressure block 25, and a downward inclined slide channel 252 is provided at the lower part of the pressure block 25, the top of the slide channel 252 is connected to the bottom of the feed channel 251, and the slide channel 252 passes through to the outside of the lower die sleeve 22.
[0048] In one embodiment, the pressure block includes a first pressure block 25a and a second pressure block 25b, wherein the top of the first pressure block 25a contacts the bottom of the trimming lower die 23, the top of the second pressure block 25b contacts the bottom of the first pressure block 25a, and the bottom of the second pressure block 25b contacts the lower die 21.
[0049] A material discharge channel 251 is arranged at the center of the first pressure block 25a, the top of the second pressure block 25b is arranged as a downwardly inclined structure, the lower part of the first pressure block 25a is arranged with an inclined surface parallel to the top of the second pressure block 25b, and the inclined surface and the second pressure block 25b form a slide channel 252.
[0050] The working principle of the utility model is: the presser is connected with the nitrogen spring so that the presser can move relative to the trimming punch. When the forging is trimmed, the presser uses the force provided by the nitrogen spring to keep the forging flash on the trimming lower die, and the forging can slide out of the die directly through the discharge channel and the chute channel.
[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.
[0052] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify and vary the above embodiments within the scope of the present invention.
Claims
1. A cold forging trimming die for a triangular flange sleeve, comprising an upper die and a lower die, characterized in that: The upper die includes an upper die plate, an upper die sleeve, a fixing plate, an elastic device, a trimming punch and a press. The upper mold sleeve is fixed to the bottom of the upper mold plate. The fixing plate is arranged in the mold cavity of the upper mold sleeve and contacts the bottom of the upper mold plate. The trimming punch is arranged in the die cavity of the upper die sleeve and is fixedly connected with the upper die sleeve. The top of the trimming punch contacts the fixed plate, and the lower end of the trimming punch extends out of the upper die sleeve. One end of the elastic device is fixed to the fixed plate, and the other end of the elastic device extends out of the upper die sleeve and is connected to the presser. The presser is movably sleeved on the portion of the trimming punch extending out of the upper die sleeve, and the bottom shape of the presser matches the top edge shape of the forging. When the trimming punch descends, the presser first presses on the edge of the forging, and the trimming punch continues to descend until the top of the presser contacts the bottom of the upper die sleeve and presses the forging tightly, and the trimming punch continues to descend to squeeze the forging downward until it is separated from the flash.
2. The cold forging trimming die of the triangular flange sleeve according to claim 1, characterized in that: The lower die comprises a lower die plate, a lower die sleeve, a trimming lower die, a pressing plate and a pressure block. The lower mold sleeve is fixed on the top of the lower mold plate. The trimming lower die is fixed to the top of the lower die sleeve through the pressing plate, and the die cavity of the trimming lower die is connected to the die cavity of the lower die sleeve. The pressure block is arranged in the mold cavity of the lower mold sleeve below the trimming lower mold, and the top of the pressure block is in contact with the bottom of the trimming lower mold.
3. The cold forging trimming die of the triangular flange sleeve according to claim 1, characterized in that: A raised step is arranged on the side wall of the trimming punch and is clamped and fixed with the upper die sleeve.
4. The cold forging trimming die for the triangular flange sleeve according to claim 1, characterized in that: The upper mold sleeve includes an outer sleeve and an inner sleeve, the outer sleeve is arranged on the outer side of the inner sleeve, the top of the inner sleeve is in contact with the fixed plate, the bottom of the inner sleeve is lower than the bottom of the outer sleeve, and the outer side of the bottom of the inner sleeve is provided with a step and is fixed to the outer sleeve through a cap.
5. The cold forging trimming die for the triangular flange sleeve according to claim 4, characterized in that: The bottom of the inner sleeve and the top of the press are in matching plane shapes.
6. The cold forging trimming die for the triangular flange sleeve according to claim 4, characterized in that: The elastic device and the trimming punch are arranged in the mold cavity of the inner sleeve. There are three elastic devices and they are evenly arranged along the circumferential direction.
7. The cold forging trimming die for the triangular flange sleeve according to claim 4, characterized in that: The elastic device is a nitrogen spring.
8. The cold forging trimming die for the triangular flange sleeve according to claim 2, characterized in that: A material discharge channel connected to the trimming lower die cavity is arranged in the center of the pressure block, a downward inclined slide channel is arranged at the lower part of the pressure block, the top of the slide channel is connected to the bottom of the material discharge channel, and the slide channel passes through to the outside of the lower die sleeve.
9. The cold forging trimming die for the triangular flange sleeve according to claim 8, characterized in that: The pressure block includes a first pressure block and a second pressure block, the top of the first pressure block contacts the bottom of the trimming lower die, the top of the second pressure block contacts the bottom of the first pressure block, and the bottom of the second pressure block contacts the lower die. A material discharge channel is arranged at the center of the first pressure block, the top of the second pressure block is arranged as a downwardly inclined structure, the lower part of the first pressure block is arranged with an inclined surface parallel to the top of the second pressure block, and the inclined surface and the second pressure block form a slide channel.