CN120133379B - Fine blanking die applied to step part forming - Google Patents

Fine blanking die applied to step part forming

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Publication number
CN120133379B
CN120133379B CN202510630937.5A CN202510630937A CN120133379B CN 120133379 B CN120133379 B CN 120133379B CN 202510630937 A CN202510630937 A CN 202510630937A CN 120133379 B CN120133379 B CN 120133379B
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CN
China
Prior art keywords
punch
plate
die
forming
die assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
CN202510630937.5A
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Chinese (zh)
Other versions
CN120133379A (en
Inventor
陈登
潘岱煌
黄宏伟
陈洁琳
何维
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Huaguan Fine Blanking Compoments Co ltd
Original Assignee
Guangzhou Huaguan Fine Blanking Compoments Co ltd
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Application filed by Guangzhou Huaguan Fine Blanking Compoments Co ltd filed Critical Guangzhou Huaguan Fine Blanking Compoments Co ltd
Priority to CN202510630937.5A priority Critical patent/CN120133379B/en
Publication of CN120133379A publication Critical patent/CN120133379A/en
Application granted granted Critical
Publication of CN120133379B publication Critical patent/CN120133379B/en
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Classifications

    • 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
    • B21D37/08—Dies with different parts for several steps in a process
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/14—Dies
    • 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
    • B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/38—Making other particular articles locksmith's goods, e.g. handles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

本发明公开了一种应用于台阶零件成形的精冲模具，涉及成形模具技术领域；所述精冲模具包括上模组件以及下模组件，所述上模组件与所述下模组件之间设有用于放置板料的间隙；所述精冲模具沿所述板料的前进方向依次设置有第一工位、第二工位以及第三工位；所述第一工位用于冲切零件的台阶面的外围区域，所述第二工位用于对所述零件的台阶面进行压扁处理，所述第三工位用于对所述零件的主平面以及台阶面进行整体冲切成形；本发明提供的技术方案能够提高零件的成品质量。

The present invention discloses a precision stamping die for forming step parts, and relates to the technical field of forming dies; the precision stamping die comprises an upper die assembly and a lower die assembly, and a gap for placing a sheet material is provided between the upper die assembly and the lower die assembly; the precision stamping die is provided with a first station, a second station and a third station in sequence along the forward direction of the sheet material; the first station is used for punching the peripheral area of the step surface of the part, the second station is used for flattening the step surface of the part, and the third station is used for punching and forming the main plane and the step surface of the part as a whole; the technical solution provided by the present invention can improve the quality of the finished product of the part.

Description

Fine blanking die applied to step part forming
Technical Field
The invention relates to the technical field of fine blanking dies, in particular to a fine blanking die applied to step part forming.
Background
In the prior art, a general forming step is to form a plurality of parts by adopting continuous die processing on a plate, wherein a main plane (the thickness of the main plane is the same as that of the plate) and a step surface (the thickness of the step surface is lower than that of the plate) of the part in the step structure are respectively subjected to finish contour processing, so that obvious punching interfaces exist at the connection positions of contour lines corresponding to the main plane and the step surface, namely, the contour lines corresponding to the main plane and the step surface are in non-complete smooth transition, and the quality of finished products of the parts is poor.
Disclosure of Invention
The invention mainly aims to provide a fine blanking die applied to step part forming, and aims to improve the quality of finished products of parts.
In order to achieve the purpose, the invention provides a fine blanking die applied to step part forming, which comprises an upper die assembly and a lower die assembly, wherein a gap for placing a plate is arranged between the upper die assembly and the lower die assembly, the fine blanking die is sequentially provided with a first station, a second station and a third station along the advancing direction of the plate, the first station is used for punching the peripheral area of the step surface of a part, the second station is used for flattening the step surface of the part, and the third station is used for integrally punching and forming the main plane and the step surface of the part.
In an embodiment, the upper die assembly comprises an upper die plate, an upper base plate and a pressing plate which are sequentially arranged from top to bottom, wherein the upper die plate is fixedly connected with the upper base plate, the pressing plate can slide up and down relative to the upper base plate, the upper die assembly further comprises an upper dowel bar, the lower end of the upper dowel bar sequentially slides through the upper die plate and the upper base plate and is fixedly connected with the pressing plate, the lower die assembly comprises a lower die plate, a lower base plate and a concave die plate which are sequentially arranged from bottom to top, the lower die plate is fixedly connected with the lower base plate, the concave die plate can slide up and down relative to the lower base plate, the lower die assembly further comprises a floating ejector rod, the upper end of the floating ejector rod sequentially slides through the lower die plate and is fixedly connected with the concave die plate, a limiting ring is arranged at the top end of the floating ejector rod, the upper end of the floating ejector rod is sleeved with a spring piece, the upper end of the spring piece is respectively abutted against the limiting ring and the lower die plate, and the concave die plate is pressed between the die assembly and the die plate when the die assembly is pressed down.
In one embodiment, the first station comprises a precut punch arranged on the upper die assembly and a first female die cavity arranged on the female die plate, and when the upper die assembly and the lower die assembly perform die closing action, the precut punch and the first female die cavity are combined to punch the peripheral area of the step surface of the part.
In one embodiment, the pre-cutting punch is fixedly connected with the upper base plate, the pressing plate is provided with a first avoiding hole, the pre-cutting punch penetrates through the first avoiding hole to be in sliding connection with the pressing plate, the lower end face of the pre-cutting punch is higher than the lower end face of the pressing plate before the upper die assembly and the lower die assembly perform die assembly, and the height difference between the lower end face of the pre-cutting punch and the lower end face of the pressing plate is 0.4-0.8 mm.
In one embodiment, the second station comprises a flattening punch arranged on the lower die assembly, and when the upper die assembly and the lower die assembly perform die clamping action, the material pressing plate and the flattening punch are combined to flatten the step surface of the part.
In one embodiment, the flattening punch is fixedly connected with the lower base plate, the female die plate is provided with a second avoidance hole, the flattening punch penetrates through the second avoidance hole to be in sliding connection with the female die plate, the upper end face of the flattening punch is lower than the upper end face of the female die plate before the upper die assembly and the lower die assembly perform die assembly, and the height difference between the upper end face of the flattening punch and the upper end face of the female die plate is 0.4-0.8 mm.
In one embodiment, the third station comprises a forming punch head arranged on the upper die assembly and a forming counter punch head arranged on the lower die assembly, wherein the stamping surface of the forming punch head or the forming counter punch head is provided with a step structure, and when the upper die assembly and the lower die assembly perform die clamping action, the forming punch head and the forming counter punch head are combined to perform integral die cutting forming on a main plane and a step surface of the part.
In an embodiment, the forming punch is fixedly connected with the upper base plate, the material pressing plate is provided with a third avoidance hole, the forming punch penetrates through the third avoidance hole to be in sliding connection with the material pressing plate, the die plate is provided with a second die cavity which is arranged in an indent mode, the forming counter punch is in sliding connection with the second die cavity, and before the upper die assembly and the lower die assembly perform die assembly action, the lower end face of the forming punch is higher than the lower end face of the material pressing plate, and the height difference between the lower end face and the lower end face is 0.4-0.8 mm.
In one embodiment, the lower die assembly further comprises a lower dowel bar, and the upper end of the lower dowel bar sequentially slides through the lower die plate and the lower backing plate and is fixedly connected with the forming recoil head.
In one embodiment, the lower die assembly further comprises a hole punch, the hole punch is fixedly connected with the lower base plate, the forming counter punch is provided with a fourth avoidance hole, and the hole punch penetrates through the fourth avoidance hole to be in sliding connection with the forming counter punch.
According to the technical scheme, the peripheral area of the step surface of the part is punched through the first station, so that the step surface of the subsequent part has enough flattening deformation space, the step surface of the part is flattened through the second station, so that the thickness of the step surface is lower than that of a plate material, and finally the main plane and the step surface of the part are integrally punched through the third station. In the invention, the contour lines corresponding to the main plane and the step surface are complete and smooth transition and have no contour shearing surface of any punching interface, so that the aim of improving the quality of finished products of parts is achieved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a part with a step structure in the background art;
FIG. 2 is a schematic diagram of an embodiment of a fine blanking die (before die closing) for forming a step part according to the present invention;
FIG. 3 is a schematic diagram of a second embodiment of a fine blanking die for forming a step part (during die closing operation);
fig. 4 is a partial enlarged view at a in fig. 3.
Reference numerals illustrate:
100. An upper die assembly; 110 parts of upper die plate, 120 parts of upper base plate, 130 parts of pressing plate, 131 parts of first avoiding holes, 132 parts of third avoiding holes, 140 parts of upper dowel bar, 150 parts of pre-cutting punch, 160 parts of forming punch;
200. The lower die assembly, 210, a lower die plate, 220, a lower backing plate, 230, a female die plate, 231, a first female die cavity, 232, a second avoidance hole, 233, a second female die cavity, 240, a floating ejector rod, 241, a limiting ring, 242, a spring piece, 250, a flattening punch, 260, a forming counter punch, 261, a fourth avoidance hole, 270, a lower dowel bar, 280 and a hole punch;
300. plate material 310, parts 311, a main plane 312, a step surface 313 and a through hole part.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the present invention will be made more fully hereinafter with reference to the accompanying drawings, in which it is shown, however, some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if the directional indication (such as up, down, left, right, front, and rear) is included in the embodiments of the present invention, the directional indication is only used to explain the relative positional relationship, movement, etc. between the components at a particular pose and if the particular pose changes, the directional indication changes accordingly.
Furthermore, it should be noted that the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
In the prior art, for a part with a step structure (as shown in fig. 1), a continuous die is adopted for processing a plate material to form a plurality of parts in a general forming step, wherein a main plane (the thickness of the main plane is the same as that of the plate material) and a step surface (the thickness of the step surface is lower than that of the plate material) of the step structure of the part are respectively subjected to finish contour processing, so that an obvious punching interface exists at the connection part of the main plane and a contour line corresponding to the step surface, namely, the contour line corresponding to the main plane and the step surface is in incomplete smooth transition, and the quality of a finished product of the part is poor.
In order to solve the technical problems, the invention provides a fine blanking die applied to step part forming.
Referring to fig. 2-4, in an embodiment of the present invention, the fine blanking die includes an upper die assembly 100 and a lower die assembly 200, a gap for placing a plate 300 is provided between the upper die assembly 100 and the lower die assembly 200, the fine blanking die is sequentially provided with a first station, a second station and a third station along a advancing direction of the plate 300, the first station is used for punching a peripheral area of a step surface 312 of a part 310, the second station is used for flattening the step surface 312 of the part 310, and the third station is used for integrally punching and forming a main plane 311 and the step surface 312 of the part 310.
According to the technical scheme, the peripheral area of the step surface 312 of the part 310 is punched through a first station, so that the step surface 312 of the subsequent part 310 has enough lateral flattening deformation space, then the step surface 312 of the part 310 is flattened through a second station, so that the thickness of the step surface 312 is lower than that of the plate 300, and finally the main plane 311 and the step surface 312 of the part 310 are integrally punched through a third station. In the invention, because the outline of the main plane 311 and the outline of the step surface 312 are processed by integral finish cutting, the outline lines corresponding to the main plane 311 and the step surface 312 are completely and smoothly transited without any outline shearing surface of a punching interface, thereby achieving the purpose of improving the quality of the finished product of the part 310.
Specifically, the upper die assembly 100 comprises an upper die plate 110, an upper base plate 120 and a material pressing plate 130 which are sequentially arranged from top to bottom, wherein the upper die plate 110 is fixedly connected with the upper base plate 120, the material pressing plate 130 can slide up and down relative to the upper base plate 120, the upper die assembly 100 further comprises an upper dowel 140, the lower end of the upper dowel 140 sequentially slides through the upper die plate 110 and the upper base plate 120 and is fixedly connected with the material pressing plate 130, and the lower die assembly 200 comprises a lower die plate 210 which is sequentially arranged from bottom to top, The lower die assembly 200 further comprises a floating ejector rod 240, the upper end of the floating ejector rod 240 sequentially slides through the lower die plate 210 and the lower die plate 220 and is fixedly connected with the die plate 230, a limiting ring 241 is arranged at the top end of the floating ejector rod 240, a spring piece 242 is sleeved on the floating ejector rod 240, the upper end and the lower end of the spring piece 242 are respectively abutted against the limiting ring 241 and the lower die plate 220, and when the upper die assembly 100 and the lower die assembly 200 perform die assembly, the plate 300 is pressed between the pressing plate 130 and the die plate 230. The upper die assembly 100 is integrally moved down to the lower bolster 220 by the spring force of the spring member 242, the lower platen 130 is firstly contacted with the plate 300 and extrudes the die plate 230 to enable the die plate 230 to move down to contact with the lower bolster 220 against the spring force of the spring member 242, the die plate 130 and the die plate 230 are combined to compress the plate 300 at the moment, the upper die assembly 100 is continuously moved down to drive the pre-cutting punch 150 and the forming punch 160 to move down to die-cut the corresponding position of the plate 300 along with the integral movement of the upper die assembly 100, the die plate 230 is pressed down to contact with the lower bolster 220 by the pressing punch 250, the pressing punch 250 is moved up relative to the die plate 230 to enable the pressing punch 250 to be processed by the lower upper die plate to press the step surface 312 of the part 310, the pressing plate 130 is continuously moved down to the pressing plate 130 along with the vertical direction of the pressing bar 130, and the vertical force of the pressing bar 130 is always kept by the upper die assembly 130 in order to ensure that the vertical pressing bar assembly 130 is continuously moved along with respect to the pressing bar 130. Similarly, the vertically arranged floating pin 240 can also ensure that the cavity plate 230 can move in the vertical direction when moving downward relative to the lower plate 220.
Further, at least two upper dowel bars 140 are provided, and at least two upper dowel bars 140 are symmetrically provided on the left and right sides of the pressing plate 130. By arranging at least two upper dowel bars 140 symmetrically arranged, the compaction force applied to the material pressing plate 130 can be balanced in left and right stress. In this embodiment, two upper dowel bars are provided.
Further, at least two floating ejector rods 240 are provided, and at least two floating ejector rods 240 are symmetrically disposed at the left and right sides of the female mold plate 230. By arranging at least two floating ejector rods 240 symmetrically arranged, the supporting force applied to the female die plate 230 can be balanced in left and right stress. In this embodiment, two floating ejector pins are provided.
As a preferable mode of the above embodiment, the first station includes the precut punch 150 provided to the upper die assembly 100 and the first die cavity 231 provided to the die plate 230, and when the upper die assembly 100 and the lower die assembly 200 perform the die clamping operation, the precut punch 150 and the first die cavity 231 are combined to punch the peripheral region of the stepped surface 312 of the part 310. It will be appreciated that when the sheet 300 is moved to the point where the open area of the first die cavity 231 and the peripheral area of the step surface 312 of the part 310 overlap each other, the peripheral area of the precut punch 150 is cut into the interior of the first die cavity 231 when the precut punch 150 is punched downward, thereby completing the cutting of the peripheral area of the step surface 312 of the part 310, since the cut surface profile of the precut punch 150 coincides with the peripheral area of the step surface 312 of the part 310.
Specifically, the pre-cutting punch 150 is fixedly connected with the upper base plate 120, the pressing plate 130 is provided with a first avoiding hole 131, the pre-cutting punch 150 penetrates through the first avoiding hole 131 and is in sliding connection with the pressing plate 130, so that the mutual interference of moving tracks of the pre-cutting punch 150 and the pressing plate 130 is avoided, and before the upper die assembly 100 and the lower die assembly 200 perform die assembly action, the lower end face of the pre-cutting punch 150 is higher than the lower end face of the pressing plate 130, and the height difference between the lower end face and the pressing plate is 0.4-0.8 mm. So configured, the height difference is used as a punching distance to ensure that the pre-cutting punch 150 has a sufficient punching distance to punch the peripheral area as the upper die assembly 100 continues to descend entirely after the blank 300 is pressed by the blank holder 130 and the die holder 230. In the present embodiment, the height difference between the lower end surface of the precut punch 150 and the lower end surface of the platen 130 is 0.5mm.
Further, a first oil groove (not shown in the drawings) is provided in the pressing plate 130, and the first oil groove communicates with the sliding gap between the precut punch 150 and the first relief hole 131. So set up, through setting up first lubrication groove in order to pour into the lubrication grease into the smooth fit clearance of precutting punch 150 and first dodge hole 131 to ensure that the relative displacement between precutting punch 150 and the pressure plate 130 is smooth and easy.
Preferably, the second station includes a flattening punch 250 provided in the lower die assembly 200, and the pressing plate 130 is coupled to the flattening punch 250 to flatten the stepped surface 312 of the part 310 when the upper die assembly 100 and the lower die assembly 200 are clamped. So set up, in the course of carrying out the compound die action, after the upper die assembly 100 wholly descends so as to make the blank holder 130 combine with the die plate 230 to compress the plate 300, along with the continued wholly descending of the upper die assembly 100, the upper die assembly 100 drives the die plate 230 to overcome the elastic force of the spring member 242 so as to make the die plate 230 move down to contact with the lower backing plate 220, and because the flattening punch 250 is mounted on the lower backing plate 220, namely, the position of the flattening punch 250 is unchanged in the downward moving process of the die plate 230, at this time, the flattening punch 250 moves up relatively to the die plate 230, so that the flattening punch 250 can flatten the step surface 312 of the part 310 from bottom to top, which is simple in structure and strong in practicability.
Specifically, the flattening punch 250 is fixedly connected with the lower base plate 220, the female die plate 230 is provided with a second avoiding hole 232, the flattening punch 250 passes through the second avoiding hole 232 and is slidably connected with the female die plate 230, so that the mutual interference of the moving track of the flattening punch 250 and the female die plate 230 is avoided, the upper end surface of the flattening punch 250 is lower than the upper end surface of the female die plate 230 before the upper die assembly 100 and the lower die assembly 200 perform die assembly operation, and the height difference between the upper end surface and the lower end surface is 0.4-0.8 mm. So configured, the height differential is utilized as a flattening distance to ensure that the downward displacement of the die plate 230 is sufficient to cause the flattening punch 250 to flatten the step surface 312 during further downward displacement of the die plate 230 by the upper die assembly 100. In this embodiment, the difference in height between the upper end surface of the flattening punch 250 and the upper end surface of the die plate 230 is 0.5mm.
Further, a second lubrication groove (not shown in the drawings) is provided in the die plate 230, and the second lubrication groove communicates with the sliding gap between the flattening punch 250 and the second avoidance hole 232. So set up, through setting up the second lubrication groove in order to pour into the lubrication grease into the smooth fit clearance of flattening punch 250 and second dodge hole 232 to ensure that the relative displacement between flattening punch 250 and die plate 230 is smooth and easy.
As a preferred embodiment of the above embodiment, referring to fig. 4, the third station includes a forming punch 160 provided on the upper die assembly 100 and a forming counter punch 260 provided on the lower die assembly 200, wherein the forming punch 160 or the stamping surface of the forming counter punch 260 has a stepped structure, and when the upper die assembly 100 and the lower die assembly 200 perform the die-locking operation, the forming punch 160 and the forming counter punch 260 combine to perform the integral die-cutting forming of the main plane 311 and the stepped surface 312 of the part 310. So configured, during the mold closing operation, the lower pressing plate 130 is first combined with the die plate 230 to press the plate 300, and then the upper mold assembly 100 continues to descend to drive the forming punch 160, so that the forming punch 160 and the forming counter punch 260 are combined to integrally die-cut the part 310, so as to integrally die-cut the main plane 311 and the step surface 312 of the part 310. In the present embodiment, the step structure is provided on the punching surface of the forming counter punch 260.
Specifically, the forming punch 160 is fixedly connected with the upper backing plate 120, the pressing plate 130 is provided with a third avoiding hole 132, the forming punch 160 is slidably connected with the pressing plate 130 through the third avoiding hole 132, so as to avoid mutual interference of moving tracks of the forming punch 160 and the pressing plate 130, the die plate 230 is provided with a second die cavity 233 concavely arranged, the forming counter punch 260 is slidably connected in the second die cavity 233, and before the upper die assembly 100 and the lower die assembly 200 perform die clamping action, the lower end surface of the forming punch 160 is higher than the lower end surface of the pressing plate 130, and the height difference between the lower end surface and the lower end surface is 0.4-0.8 mm. So configured, the height difference is used as a punching distance to ensure that the forming punch 160 has sufficient punching distance to punch the part 310 as the upper die assembly 100 continues to descend entirely after the blank 300 is compressed by the blank holder 130 and the die holder 230. In the present embodiment, the height difference between the lower end surface of the forming punch 160 and the lower end surface of the blank holder 130 is 0.5mm.
Further, a third oil groove (not shown in the drawings) is provided in the pressing plate 130, the third oil groove communicates with the slip gap between the forming punch 160 and the third relief hole 132, and/or a fourth oil groove (not shown in the drawings) is provided in the die plate 230, the fourth oil groove communicates with the slip gap between the forming counter punch 260 and the second die cavity 233. By arranging the third lubricating oil groove to inject lubricating grease into the sliding gap between the forming punch 160 and the third avoiding hole 132, the relative displacement between the forming punch 160 and the blank holder 130 is ensured to be smooth, and by arranging the fourth lubricating oil groove to inject lubricating grease into the sliding gap between the forming counter punch 260 and the second die cavity 233, the relative displacement between the forming counter punch 260 and the die plate 230 is ensured to be smooth.
Further, the lower die assembly 200 further includes a lower dowel 270, and an upper end of the lower dowel 270 is sequentially slid through the lower die plate 210 and the lower backing plate 220 and fixedly coupled to the forming counter punch 260. After the forming punch 160 and the forming counter punch 260 form the part 310, the part 310 is embedded in the second die cavity 233, and the external driving device drives the lower dowel 270 to lift up to jack up the forming counter punch 260, so that the part 310 is lifted up to the upper end face of the die plate 230, and the operator can take out the part 310 conveniently.
Further, the lower die assembly 200 further comprises a hole punch 280, wherein the hole punch 280 is fixedly connected with the lower base plate 220, the forming counter punch 260 is provided with a fourth avoiding hole 261, and the hole punch 280 passes through the fourth avoiding hole 261 to be in sliding connection with the forming counter punch 260. In this way, since some manufacturers require the part 310 to be provided with the through hole 313, the application is provided with the hole punch 280 for the reasons described above, and when the part 310 is driven by the forming punch 160 to move to the second die cavity 233 in the process of die assembly, the hole punch 280 is mounted on the lower base plate 220, that is, the position of the hole punch 280 is unchanged in the process of moving down the forming counter punch 260, at this time, the position corresponds to that the hole punch 280 moves up relative to the forming counter punch 260, so that the hole punch 280 can process the part 310 from bottom to top to form the through hole 313, and the application has simple structure and strong practicability. In other embodiments, the through hole 313 may be designed as a blind hole, and the hole punch 280 may be designed such that a certain distance remains between the upper end surface and the lower end surface of the forming punch 160.
The stamping step of the fine stamping die of the present application will be specifically described below with reference to the above embodiments:
Before the clamping operation, the upper dowel 140 presses the platen 130 so that the lower end surface of the platen 130 is 0.5mm from the lower end surface of the precut punch 150, the distance between the lower end surface of the platen 130 and the upper end surface of the die plate 230 is about 80mm, and the lower dowel 270 supports the counter punch 260 so that the upper end surface of the counter punch 260 is substantially flush with the upper end surface of the die plate 230.
When the die closing operation is performed, the upper die assembly 100 is wholly moved down, the material pressing plate 130 is firstly contacted with the plate 300 and is continuously moved down until the plate 300 is closely attached to the upper end face of the floating die plate 230, the upper die assembly 100 is continuously moved down wholly, the material pressing plate 130 and the die plate 230 are supported by the floating ejector rod 240 under the supporting action of the upper force transmission rod 140, the plate 300 is oppositely pressed and continuously moved down, at the same time, the flattening punch 250 of the second station is moved up relative to the die plate 230, flattening treatment is started to be performed on the step face 312 of the part 310 until the step face 312 is synchronously completed to flatten the part 310 until the die plate 230 and the lower base plate 220 are mutually attached, at the same time, the material pressing plate 130 stops moving down relative to the die plate 230, the precutting punch 150 and the forming punch 160 are continuously moved down, the precutting punch 150 of the first station punches the plate 300, namely, the peripheral area of the step face 312 of the part 310 is completed to complete precutting holes, and at the third station, the forming counter punch 260 is pressed and the forming counter punch 160 is pressed and moved down continuously because the downward force applied to the forming punch 160 is larger than the upward force of the forming counter punch 260 supported by the lower punch 270. At this time, the upper die assembly 100 stops descending. The pre-cutting punch 150 and the forming punch 160 have the same downward stroke.
The upper die assembly 100 goes upward and returns, after going upward a certain distance, the upper dowel 140 goes downward relative to the upper die plate 110, and pushes the pressing plate 130 downward relative to the pre-cutting punch 150 and the forming punch 160, so as to separate the plate 300 clamped at the peripheries of the pre-cutting punch 150 and the forming punch 160. Simultaneously, the lower dowel 270 pushes the forming counter punch 260 upward under the action of the external driving device until the upper end surface of the forming counter punch 260 is substantially flush with the upper end surface of the cavity plate 230, so that the forming counter punch 260 can push the part 310 out of the second cavity 233, and at this time, the operator can take out the part 310. When the upper die assembly 100 is moved up until the pressing plate 130 and the die plate 230 are separated from each other, the spring member 242 is forced to move up the die plate 230 by its own elastic force due to the lack of the extrusion of the upper die assembly 100, so that the die plate 230 is separated from the lower plate 220 to complete the reset.
In addition, according to the above description, the peripheral area is punched from top to bottom by using the pre-cutting punch 150, the step surface 312 is flattened from bottom to top by using the flattening punch 250, and the forming fine punching is punched from top to bottom by using the forming punch 160 and the forming counter punch 260, so that the part 310 is prevented from being repeatedly stressed on one side during the repeated up and down punching process, which is beneficial to reducing the punching damage rate of the part 310.
Meanwhile, in the third station, the part 310 is subjected to the pressing force provided by the pressing of the pressing plate 130 against the die plate 230 on the first side, the counter pressure from the forming counter punch 260 provided by the lower dowel 270 on the second side, and the blanking force from the forming punch 160 provided by the entire downward movement of the upper die assembly 100 on the third side. In this way, the part 310 in the shearing area is in a three-way compressive stress state in the fine blanking process, so that the plasticity of the material is improved, and further, the dimensional tolerance of the blanking part is small, the shape and position precision is high, the blanking surface is smooth, and the surface is flat.
It should be noted that, other contents of the fine blanking die applied to step part forming disclosed in the present invention are the prior art, and are not described herein.
The foregoing is merely an alternative embodiment of the present invention, and is not intended to limit the scope of the present invention, and all applications of the present invention directly/indirectly in other related technical fields are included in the scope of the present invention.

Claims (6)

1.一种应用于台阶零件成形的精冲模具，其特征在于：所述精冲模具包括上模组件以及下模组件，所述上模组件与所述下模组件之间设有用于放置板料的间隙；1. A fine blanking die for forming stepped parts, characterized in that: the fine blanking die comprises an upper die assembly and a lower die assembly, wherein a gap is provided between the upper die assembly and the lower die assembly for placing a sheet material; 所述精冲模具沿所述板料的前进方向依次设置有第一工位、第二工位以及第三工位；所述第一工位用于冲切零件的台阶面的外围区域，所述第二工位用于对所述零件的台阶面进行压扁处理，所述第三工位用于对所述零件的主平面以及台阶面进行整体冲切成形；The fine blanking die is sequentially provided with a first station, a second station, and a third station along the advancing direction of the sheet material; the first station is used for punching the peripheral area of the step surface of the part, the second station is used for flattening the step surface of the part, and the third station is used for punching and forming the main plane and the step surface of the part as a whole; 具体地，所述上模组件包括由上至下依次设置的上模板、上垫板以及压料板，其中所述上模板与所述上垫板固定连接，所述压料板可相对于所述上垫板进行上下滑动；所述上模组件还包括上传力杆，所述上传力杆的下端依次滑动穿过所述上模板以及所述上垫板并与所述压料板固定连接；Specifically, the upper die assembly includes an upper die plate, an upper pad, and a pressure plate arranged in sequence from top to bottom, wherein the upper die plate is fixedly connected to the upper pad, and the pressure plate can slide up and down relative to the upper pad; the upper die assembly also includes a force transmitting rod, the lower end of which slides through the upper die plate and the upper pad in sequence and is fixedly connected to the pressure plate; 所述下模组件包括由下至上依次设置的下模板、下垫板以及凹模板，其中所述下模板与所述下垫板固定连接，所述凹模板可相对于所述下垫板进行上下滑动；所述下模组件还包括浮动顶杆，所述浮动顶杆的上端依次滑动穿过所述下模板以及所述下垫板并与所述凹模板固定连接；所述浮动顶杆的顶端设置有限位环，所述浮动顶杆套设有弹簧件，所述弹簧件的上下两端分别抵接所述限位环以及所述下垫板；The lower die assembly includes a lower die plate, a lower pad, and a concave die plate, which are arranged in sequence from bottom to top, wherein the lower die plate is fixedly connected to the lower pad, and the concave die plate can slide up and down relative to the lower pad; the lower die assembly also includes a floating ejector rod, the upper end of which slides through the lower die plate and the lower pad in sequence and is fixedly connected to the concave die plate; a limit ring is provided at the top end of the floating ejector rod, and a spring member is sleeved on the floating ejector rod, and the upper and lower ends of the spring member respectively abut against the limit ring and the lower pad; 当所述上模组件与所述下模组件进行合模动作时，所述板料压紧于所述压料板与所述凹模板之间；When the upper mold assembly and the lower mold assembly perform a mold closing action, the sheet material is pressed tightly between the pressing plate and the concave mold plate; 其中，所述第三工位包括设置于所述上模组件的成形冲头以及设置于所述下模组件的成形反冲头，其中所述成形冲头或者所述成形反冲头的冲压面具有台阶结构；当所述上模组件与所述下模组件进行合模动作时，所述成形冲头与所述成形反冲头相结合对所述零件的主平面以及台阶面进行整体冲切成形；The third workstation includes a forming punch provided on the upper die assembly and a forming back punch provided on the lower die assembly, wherein the punching surface of the forming punch or the forming back punch has a step structure; when the upper die assembly and the lower die assembly are clamped, the forming punch and the forming back punch are combined to integrally punch and form the main plane and the step surface of the part; 所述成形冲头与所述上垫板固定连接，所述压料板设有第三避让孔，所述成形冲头穿过所述第三避让孔与所述压料板滑动连接；所述凹模板设有内凹设置的第二凹模型腔，所述成形反冲头滑动连接于所述第二凹模型腔中；在所述上模组件与所述下模组件进行合模动作之前，所述成形冲头的下端面高于所述压料板的下端面，二者之间的高度差为0.4~0.8mm；The forming punch is fixedly connected to the upper pad, the press plate is provided with a third avoidance hole, the forming punch passes through the third avoidance hole and is slidably connected to the press plate; the concave mold plate is provided with a second concave mold cavity with an inward concave setting, and the forming counter-punch is slidably connected to the second concave mold cavity; before the upper mold assembly and the lower mold assembly perform a mold closing action, the lower end surface of the forming punch is higher than the lower end surface of the press plate, and the height difference between the two is 0.4~0.8mm; 所述下模组件还包括下传力杆，所述下传力杆的上端依次滑动穿过所述下模板以及所述下垫板并与所述成形反冲头固定连接。The lower die assembly further comprises a lower force transmission rod, the upper end of which slides through the lower die plate and the lower pad in sequence and is fixedly connected to the forming recoil punch. 2.如权利要求1所述的应用于台阶零件成形的精冲模具，其特征在于：所述第一工位包括设置于所述上模组件的预切冲头以及设置于所述凹模板的第一凹模型腔；当所述上模组件与所述下模组件进行合模动作时，所述预切冲头与所述第一凹模型腔相结合对所述零件的台阶面的外围区域进行冲切。2. The precision stamping die for forming step parts according to claim 1 is characterized in that: the first workstation includes a pre-cutting punch arranged on the upper die assembly and a first concave model cavity arranged on the concave die plate; when the upper die assembly and the lower die assembly perform a mold closing action, the pre-cutting punch is combined with the first concave model cavity to punch the outer area of the step surface of the part. 3.如权利要求2所述的应用于台阶零件成形的精冲模具，其特征在于：所述预切冲头与所述上垫板固定连接，所述压料板设有第一避让孔，所述预切冲头穿过所述第一避让孔与所述压料板滑动连接；在所述上模组件与所述下模组件进行合模动作之前，所述预切冲头的下端面高于所述压料板的下端面，所述预切冲头的下端面与所述压料板的下端面之间的高度差为0.4~0.8mm。3. The precision stamping die for step part forming as described in claim 2 is characterized in that: the pre-cutting punch is fixedly connected to the upper pad, the pressure plate is provided with a first avoidance hole, and the pre-cutting punch passes through the first avoidance hole and is slidably connected to the pressure plate; before the upper mold assembly and the lower mold assembly perform the mold closing action, the lower end face of the pre-cutting punch is higher than the lower end face of the pressure plate, and the height difference between the lower end face of the pre-cutting punch and the lower end face of the pressure plate is 0.4~0.8mm. 4.如权利要求1所述的应用于台阶零件成形的精冲模具，其特征在于：所述第二工位包括设置于所述下模组件的压扁冲头；当所述上模组件与所述下模组件进行合模动作时，所述压料板与所述压扁冲头相结合对所述零件的台阶面进行压扁处理。4. The precision stamping die for forming step parts as described in claim 1 is characterized in that: the second workstation includes a flattening punch arranged on the lower die assembly; when the upper die assembly and the lower die assembly perform a mold closing action, the pressure plate is combined with the flattening punch to flatten the step surface of the part. 5.如权利要求4所述的应用于台阶零件成形的精冲模具，其特征在于：所述压扁冲头与所述下垫板固定连接，所述凹模板设有第二避让孔，所述压扁冲头穿过所述第二避让孔与所述凹模板滑动连接；在所述上模组件与所述下模组件进行合模动作之前，所述压扁冲头的上端面低于所述凹模板的上端面，所述压扁冲头的上端面与所述凹模板的上端面之间的高度差为0.4~0.8mm。5. The precision stamping die for step part forming as described in claim 4 is characterized in that: the flattening punch is fixedly connected to the lower pad, the concave template is provided with a second avoidance hole, and the flattening punch passes through the second avoidance hole and is slidably connected to the concave template; before the upper mold assembly and the lower mold assembly perform the mold closing action, the upper end face of the flattening punch is lower than the upper end face of the concave template, and the height difference between the upper end face of the flattening punch and the upper end face of the concave template is 0.4~0.8mm. 6.如权利要求1所述的应用于台阶零件成形的精冲模具，其特征在于：所述下模组件还包括孔冲头，所述孔冲头与所述下垫板固定连接；所述成形反冲头设有第四避让孔，所述孔冲头穿过所述第四避让孔与所述成形反冲头滑动连接。6. The precision stamping die for step part forming as described in claim 1 is characterized in that: the lower die assembly also includes a hole punch, and the hole punch is fixedly connected to the lower pad; the forming recoil punch is provided with a fourth avoidance hole, and the hole punch passes through the fourth avoidance hole and is slidably connected to the forming recoil punch.
CN202510630937.5A 2025-05-16 2025-05-16 Fine blanking die applied to step part forming Active CN120133379B (en)

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CN108405719A (en) * 2018-01-29 2018-08-17 龙口市蓝牙数控装备有限公司 A kind of multi-station digital-controlled automatic extrusion forming die

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CN206997509U (en) * 2017-05-31 2018-02-13 广州市华冠精冲零件有限公司 Latch hook fine blanking die
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CH641066A5 (en) * 1979-09-25 1984-02-15 Hydrel Ag Device for the fine blanking of a workpiece
CN108405719A (en) * 2018-01-29 2018-08-17 龙口市蓝牙数控装备有限公司 A kind of multi-station digital-controlled automatic extrusion forming die

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