Fine blanking die for cutting, bending and forming
By setting forming punches and counter punches in the fine blanking die and combining them into an opposing arrangement, the problem of requiring multiple stations for forming Z-shaped bending structure parts in the prior art is solved, realizing efficient forming of parts and miniaturization of the die.
Patent Information
- Application Number
- CN202520419327.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-03-11
AI Technical Summary
In the existing technology, the forming of Z-shaped bending structure parts requires at least two stations, which leads to an increase in the overall size of the forming mold.
Design a precision stamping die for cutting and bending sheet metal. By setting forming punches and forming counter-punches in the upper and lower die assemblies, the sheet metal can be cut and bent in one stamping step. The punch assemblies are set in two opposing groups to balance the lateral forces.
It enables the sheet metal punching and stamping bending of parts to be completed in a single stamping step, reducing the number of stations, reducing the overall size of the forming die, and ensuring fine stamping accuracy.
Smart Images
Figure CN223801333U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of forming die, especially relates to a fine blanking die of cutting and bending forming. BACKGROUND
[0002] In the prior art, for the part (as shown in the accompanying drawings) with Z-shaped bending structure, the general forming step is to perform blanking on the plate by adopting the appearance pre- blanking first, and then to perform stamping and bending forming on the cut part; in this way, at least two stations are needed, resulting in the increase of the overall size of the forming die. Figure 1
[0003] It should be noted that the above content is only used to assist in understanding the technical scheme of the utility model, and does not mean that the above content is prior art. UTILITY MODEL CONTENT
[0004] The main purpose of the utility model is to provide a fine blanking die of cutting and bending forming, which can complete the blanking and stamping and bending forming of the part in one stamping step, and the overall size of the forming die is reduced by reducing the required stations.
[0005] To achieve the above purpose, the utility model provides a fine blanking die of cutting and bending forming;
[0006] Specifically, the fine blanking die comprises an upper die assembly and a lower die assembly, and a gap for placing a plate is arranged between the upper die assembly and the lower die assembly; wherein the upper die assembly comprises a pressing plate and a forming punch, the lower die assembly comprises a die plate and a forming counter punch, the die plate is provided with a concave die cavity arranged concavely, and the forming counter punch is slidingly connected in the concave die cavity; the forming punch and the forming counter punch are arranged in vertical alignment, and the forming punch and the forming counter punch combine to form a stamping surface with a curved structure.
[0007] When the upper die assembly and the lower die assembly perform the die closing action, the plate is pressed between the pressing plate and the die plate, and the forming punch and the forming counter punch combine to perform blanking on the plate to form a part with a curved structure.
[0008] The forming punch and the forming counter punch are combined to define a punch assembly, the fine blanking die comprises two punch assemblies, and the stamping surfaces of the two punch assemblies are arranged opposite to each other.
[0009] In an embodiment, the upper die assembly further comprises an upper die plate and an upper backing plate, which are sequentially arranged from top to bottom; the upper die plate is fixedly connected with the upper backing plate, and the forming punch is fixedly installed on the side of the upper backing plate away from the upper die plate; the upper die assembly further comprises an upper transmission rod, the lower end of the upper transmission rod sequentially passes through the upper die plate and the upper backing plate and is fixedly connected with the pressure plate, and the upper transmission rod is in sliding connection with the upper die plate and the upper backing plate.
[0010] In an embodiment, at least two upper transmission rods are provided, and the at least two upper transmission rods are symmetrically arranged on the left and right sides of the pressure plate.
[0011] In an embodiment, before the upper die assembly and the lower die assembly perform a closing action, the lower end surface of the forming punch is higher than the lower end surface of the pressure plate, and the height difference therebetween is 0.4-0.8 mm.
[0012] In an embodiment, the middle part of the pressure plate is provided with a through-going avoiding hole, and the forming punch is slidingly arranged in the avoiding hole; the inside of the pressure plate is provided with a first lubricating oil groove, and the first lubricating oil groove communicates with the sliding fit clearance between the forming punch and the avoiding hole.
[0013] In an embodiment, the lower die assembly comprises a lower die plate and a lower backing plate, which are sequentially fixedly arranged from top to bottom; the lower die assembly further comprises a lower transmission rod, the upper end of the lower transmission rod sequentially passes through the lower die and the lower backing plate and is fixedly connected with the forming counter punch, and the lower transmission rod is in sliding connection with the lower die and the lower backing plate.
[0014] In an embodiment, the lower transmission rod corresponding to each forming counter punch is provided with at least two lower transmission rods, and the at least two lower transmission rods are respectively connected with the high side and the low side of the stamping surface of the forming counter punch.
[0015] In an embodiment, the upper end surface of each lower transmission rod is connected with the forming counter punch in at least two-thirds of the area.
[0016] In an embodiment, the middle part of the lower transmission rod is provided with a limiting ring, and the limiting ring is used to abut against the lower backing plate; when the limiting ring and the lower backing plate abut against each other, the upper end surface of the forming counter punch and the upper end surface of the lower die plate are flush with each other.
[0017] In an embodiment, the inside of the lower die plate is provided with a second lubricating oil groove, and the second lubricating oil groove communicates with the sliding fit clearance between the forming counter punch and the lower die cavity.
[0018] The technical scheme of the utility model discloses through setting the forming punch and the forming counter punch in the upper die assembly and the lower die assembly respectively, and the forming punch and the forming counter punch combine to form the stamping surface with the curved structure;When the upper die assembly and the lower die assembly perform the die closing action, the plate material is pressed between the pressure plate and the die plate, and the forming punch and the forming counter punch combine to punch the plate material to form the part with the curved structure;Thus, the plate material punching and the stamping bending forming of the part can be completed in one stamping step, and the overall size of the forming die is reduced by reducing the required station.
[0019] Meanwhile, the utility model discloses the punch assembly formed by the combination of the forming punch and the forming counter punch is set as two groups, and the stamping surfaces of the two groups of punch assemblies are oppositely arranged;In this way, the lateral force in the punching and stamping bending forming process can be balanced, so that the lateral displacement of the plate material during the stamping process is prevented, and the fine blanking precision is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.
[0021] Figure 1 The structure diagram of the part with the curved structure in the background art;
[0022] Figure 2 The structure diagram of one embodiment of the fine blanking die for the cutting and bending forming provided by the utility model is shown in one (before the die closing action);
[0023] Figure 3 The structure diagram of one embodiment of the fine blanking die for the cutting and bending forming provided by the utility model is shown in one (when the die closing action);
[0024] Figure 4 The structure diagram of the forming counter punch and the lower transmission rod in one embodiment of the fine blanking die for the cutting and bending forming provided by the utility model. Figure 3 The local enlarged view of A in the figure;
[0025] Figure 5 The structure diagram of the forming counter punch and the lower transmission rod in one embodiment of the fine blanking die for the cutting and bending forming provided by the utility model.
[0026] MARKS OF THE DRAWINGS:
[0027] 100, the upper die assembly;110, the pressure plate;111, the avoiding hole;120, the forming punch;130, the upper die plate;140, the upper pad plate;150, the upper transmission rod;
[0028] 200, lower die assembly; 210, die plate; 211, die cavity; 220, forming ejector; 230, lower die plate; 240, lower bolster plate; 250, lower force transmission rod; 251, limiting ring;
[0029] 300, sheet metal; 310, part;
[0030] The realization, functional features and advantages of the utility model will be further described in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION
[0031] The technical solutions in the utility model will be clearly and completely described in combination with the drawings in the utility model. Obviously, only some of the embodiments of the utility model are described, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.
[0032] It should be noted that if the utility model embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings). If the certain posture changes, the directional indications also change accordingly.
[0033] In addition, it should be noted that the description involving "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of the various embodiments can be combined with each other, but must be based on the realization of the ordinary skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the utility model.
[0034] In the prior art, for the parts with Z-shaped bending structure (as shown in the drawings), the general forming steps are to perform sheet metal punching by using outer shape pre-punching, and then to perform stamping and bending forming on the cut parts; in this way, at least two stations are needed, which leads to the increase of the overall size of the forming die. Figure 1
[0035] In order to solve the above technical problems, the utility model provides a fine blanking die for cutting and bending forming.
[0036] Please refer to Figures 2-3 In an embodiment of the utility model, this fine punch die includes upper die assembly 100 and lower die assembly 200, and the gap for placing the plate material 300 is arranged between upper die assembly 100 and lower die assembly 200;Wherein, upper die assembly 100 includes the pressing plate 110 and the forming punch 120, and lower die assembly 200 includes the die plate 210 and the forming counter punch 220, the die plate 210 is provided with the concave die cavity 211 of concave setting, and the forming counter punch 220 is slidingly connected in the concave die cavity 211;The forming punch 120 and the forming counter punch 220 are vertically aligned, and the forming punch 120 and the forming counter punch 220 combine to form the bending structure stamping surface;It can be understood that the forming punch 120 has the first protruding part and the first recessed part;The forming counter punch 220 has the second protruding part and the second recessed part, wherein the first protruding part and the second recessed part are embeddedly matched, and the first recessed part and the second protruding part are embeddedly matched with each other, so that the forming punch 120 and the forming counter punch 220 combine to form the bending structure stamping surface;
[0037] When the upper die assembly 100 and the lower die assembly 200 perform the die closing action, the plate material 300 is pressed between the pressing plate 110 and the die plate 210, and the forming punch 120 and the forming counter punch 220 combine to punch the plate material 300 to form the part 310 with the bending structure;
[0038] The forming punch 120 and the forming counter punch 220 are combined to define the punch assembly, and the fine punch die includes two punch assemblies, and the stamping surfaces of the two punch assemblies are oppositely arranged.
[0039] The technical scheme of the utility model forms the bending structure stamping surface by arranging the forming punch 120 and the forming counter punch 220 on the upper die assembly 100 and the lower die assembly 200 respectively, and combining the forming punch 120 and the forming counter punch 220;When the upper die assembly 100 and the lower die assembly 200 perform the die closing action, the plate material 300 is pressed between the pressing plate 110 and the die plate 210, and the forming punch 120 and the forming counter punch 220 combine to punch the plate material 300 to form the part 310 with the bending structure;Thus, the plate material 300 punching and bending forming of the part 310 can be completed in one stamping step, and the overall size of the forming die is reduced by reducing the required stations;
[0040] Meanwhile, the punch assembly formed by the combination of the forming punch 120 and the forming counter punch 220 is provided as two groups, and the stamping surfaces of the two groups of punch assemblies are oppositely arranged; in this way, the lateral force in the punching and stamping bending forming process can be balanced, so as to ensure that the sheet metal 300 does not displace laterally in the stamping process, and the fine punching precision is beneficially ensured. Understandably, the stamping surface of the bent structure will generate a vertical force and a horizontal force (i.e. lateral force) during the stamping process, wherein the vertical force is counteracted by the upper die assembly and the lower die assembly; due to the oppositely arranged stamping surfaces of the two groups of punch assemblies, the horizontal forces thereof are also oppositely arranged to counteract each other, so as to achieve the purpose that the stamping process does not displace laterally.
[0041] As a preferred scheme of the above-mentioned embodiment, reference is made to the accompanying drawings Figures 2-3 The upper die assembly 100 further comprises an upper die plate 130 and an upper backing plate 140, which are sequentially arranged from top to bottom; the upper die plate 130 is fixedly connected with the upper backing plate 140, and the forming punch 120 is fixedly installed on the side of the upper backing plate 140 away from the upper die plate 130; the upper die assembly 100 further comprises an upper transmission rod 150, the lower end of which sequentially penetrates through the upper die plate 130 and the upper backing plate 140 and is fixedly connected with the pressure plate 110, and the upper transmission rod 150 is slidingly connected with the upper die plate 130 and the upper backing plate 140. In this way, during the clamping action, the pressure plate 110 on the lower side will first be combined with the concave die plate 210 to press the sheet metal 300, and then the upper die plate 130 continues to drive the forming punch 120 to descend to punch and form the sheet metal 300; in order to ensure that the pressure plate 110 always maintains pressure to press the sheet metal 300 during the subsequent descending process of the upper die plate 130, the first force of the upper transmission rod 150 towards the concave die plate 210 needs to be applied to the pressure plate 110, and the first force of the upper transmission rod 150 is used to ensure that the pressure plate 110 always maintains pressure to press the sheet metal 300.
[0042] Further, the upper transmission rod 150 is provided as at least two, which are symmetrically arranged on the left and right sides of the pressure plate 110. In this way, by arranging the at least two symmetrically arranged upper transmission rods 150, it is ensured that the first force applied by the pressure plate 110 can be balanced in left and right directions.
[0043] As a preferred scheme of the above embodiment, the lower end surface of the forming punch 120 is higher than the lower end surface of the pressure plate 110 before the upper die assembly 100 and the lower die assembly 200 perform the closing action, and the height difference between the two is 0.4-0.8 mm. In this way, the height difference is used as the punching distance to ensure that after the pressure plate 110 and the concave die plate 210 press the sheet metal 300, the forming punch 120 still has enough punching distance to punch the sheet metal 300 as the upper die plate 130 continues to drop. In this embodiment, the height difference between the lower end surface of the forming punch 120 and the lower end surface of the pressure plate 110 is 0.5 mm.
[0044] As a preferred scheme of the above embodiment, the middle part of the pressure plate 110 is provided with a through hole 111, and the forming punch 120 is slidingly arranged in the through hole 111; the inside of the pressure plate 110 is provided with a first lubricating oil groove (not shown in the figure), and the first lubricating oil groove communicates with the sliding fit gap between the forming punch 120 and the through hole 111. In this way, by setting the first lubricating oil groove to inject lubricating oil into the sliding fit gap between the forming punch 120 and the through hole 111, the relative displacement between the forming punch 120 and the pressure plate 110 is ensured to be smooth.
[0045] As a preferred scheme of the above embodiment, referring to the accompanying Figures 2-3 The lower die assembly 200 includes a lower die plate 230 and a lower backing plate 240, and the concave die plate 210, the lower backing plate 240, and the lower die plate 230 are sequentially fixed from top to bottom. The lower die assembly 200 further includes a lower transmission rod 250, the upper end of the lower transmission rod 250 sequentially penetrates the lower die and the lower backing plate 240 and is fixedly connected with the forming counter punch 220, and the lower transmission rod 250 is slidingly connected with the lower die and the lower backing plate 240. In this way, after the forming punch 120 and the forming counter punch 220 form the part 310, the part 310 will be embedded in the concave die cavity 211 of the concave die plate 210, at which time the forming counter punch 220 is lifted up by the lower transmission rod 250 to lift the part 310 above the upper end surface of the concave die plate 210, thereby facilitating the operator to take out the part 310.
[0046] Further, the lower transmission rod 250 corresponding to each forming counter punch 220 is provided with at least two, and the at least two lower transmission rods 250 are respectively connected with the high side and the low side of the punching surface of the forming counter punch 220. In this way, considering that the forming counter punch 220 is provided with a curved punching surface, in order to ensure that the stress of the forming counter punch 220 is balanced during the lifting process, the lower transmission rod 250 is provided in multiple in this embodiment, and the multiple forming counter punches 220 are respectively connected with the high side and the low side of the punching surface of the forming counter punch 220.
[0047] Further, referring to the accompanying Figure 5At least two-thirds of the upper end surface of each lower force transmission rod 250 is connected to the forming counter punch 220. In this way, the distance between adjacent lower force transmission rods 250 is as far as possible to avoid the multiple lower force transmission rods 250 being too close to increase the layout difficulty; based on the above consideration, the embodiment provides that at least two-thirds of the upper end surface of each lower force transmission rod 250 is connected to the forming counter punch 220, that is, the remaining one-third area can be located outside the forming counter punch 220, so that the distance between adjacent lower force transmission rods 250 can be further, thereby reducing the layout difficulty of the lower force transmission rod 250.
[0048] Further, with reference to the accompanying drawings Figures 3-4 Further, the middle part of the lower force transmission rod 250 is provided with a limiting ring 251, which is used to abut against the lower bolster plate 240; when the limiting ring abuts against the lower bolster plate 240, the upper end surface of the forming counter punch 220 is flush with the upper end surface of the die holder 210. In this way, in order to avoid the lower force transmission rod 250 being lifted too high to make the upper end surface of the forming counter punch 220 higher than the upper end surface of the die holder 210, so that the placement plane of the plate material 300 appears concave-convex, which is not convenient for the placement of the plate material 300. Therefore, the embodiment provides the limiting ring 251 on the lower force transmission rod 250, when the lower force transmission rod 250 is lifted to the position that the limiting ring 251 abuts against the lower bolster plate 240, the lower force transmission rod 250 cannot continue to lift, at this time, the upper end surface of the forming counter punch 220 is flush with the upper end surface of the die holder 210, so as to ensure that the plate material 300 can be placed stably on the die holder 210.
[0049] As a preferred embodiment of the above embodiment, the die holder 210 is internally provided with a second lubricating oil groove (not shown in the drawings), which communicates with the sliding fit gap between the forming counter punch 220 and the die cavity 211. In this way, by providing the second lubricating oil groove to inject lubricating oil into the sliding fit gap between the forming counter punch 220 and the die cavity 211, the relative displacement between the forming counter punch 220 and the die holder 210 is ensured to be smooth.
[0050] The stamping steps of the fine blanking die of the present application will be described in detail below in combination with the above embodiment:
[0051] Before the die closing action, the upper force transmission rod 150 presses the pressure plate 110, so that the lower end surface of the pressure plate 110 is at a distance of 0.5 mm from the lower end surface of the forming punch 120; the distance between the lower end surface of the pressure plate 110 and the upper end surface of the die holder 210 is about 100 mm; the lower force transmission rod 250 supports the forming counter punch 220, so that the upper end surface of the forming counter punch is basically flush with the upper end surface of the die holder 210.
[0052] When the die closing action is performed, the upper die assembly 100 as a whole goes down, the pressure plate 110 first contacts the plate 300, and continues to go down until the plate 300 is tightly attached to the upper end surface of the concave die plate 210; the upper die assembly 100 continues to go down as a whole, the pressure plate 110 is tightly pressed against the plate 300 in opposition to the concave die plate 210 under the support of the upper transmission force rod 150, at this time, the pressure plate 110 stops going down relative to the concave die plate 210; while the upper die assembly 100 continues to drive the forming punch 120 to go down, and the forming counter-punch 220 supported by the lower transmission force rod 250 is pressed against the plate 300, because the downward force applied to the forming punch 120 is greater than the upward force of the forming counter-punch 220, the forming punch 120 and the forming counter-punch 220 press the plate 300 at the same time, and after the height distance of the bending structure relative to the concave die plate 210 is bent, the cutting and forming of the bending structure are completed. At this time, the upper die assembly 100 stops going down.
[0053] The upper die assembly 100 goes up and returns, and after going up for a certain distance, the upper transmission force rod 150 goes down relative to the upper die plate 130, pushes the pressure plate 110 downward relative to the forming punch 120, so as to separate the plate 300 clamped on the periphery of the forming punch 120. At the same time, the lower transmission force rod 250 pushes the forming counter-punch 220 upward, the forming counter-punch 220 pushes the part 310 out of the concave die cavity 211, at this time, the part 310 is taken out.
[0054] It should be noted that other contents of the fine blanking die for cutting and bending forming disclosed by the utility model are prior art, and will not be described here.
[0055] The above is only an optional embodiment of the utility model, and does not limit the patent range of the utility model, and any direct / indirect application of the utility model in other related technical fields is included in the patent protection range of the utility model.
Claims
1. A fine-blanking die for bending and forming a cut piece, characterized by, The fine blanking die comprises an upper die assembly and a lower die assembly, and a gap for placing a plate is arranged between the upper die assembly and the lower die assembly; The upper die assembly comprises a pressure plate and a forming punch, and the lower die assembly comprises a die plate and a forming counter punch, the die plate is provided with a concave die cavity arranged in a concave manner, and the forming counter punch is slidingly connected in the concave die cavity; the forming punch and the forming counter punch combine to form a stamping surface with a curved structure; When the upper die assembly and the lower die assembly perform a die closing action, the plate is pressed between the pressure plate and the die plate, and the forming punch and the forming counter punch combine to punch the plate to form a part with a curved structure; The fine blanking die comprises two sets of punch assemblies, and the stamping surfaces of the two sets of punch assemblies are oppositely arranged.
2. The fine blanking die of claim 1, wherein: The upper die assembly further comprises an upper die plate and an upper pad, and the upper die plate, the upper pad and the pressure plate are sequentially arranged from top to bottom; the upper die plate and the upper pad are fixedly connected, and the forming punch is fixedly installed on the side of the upper pad away from the upper die plate; The upper die assembly further comprises an upper transmission rod, the lower end of the upper transmission rod sequentially penetrates through the upper die plate and the upper pad and is fixedly connected with the pressure plate, and the upper transmission rod is slidingly connected with the upper die plate and the upper pad.
3. The fine blanking die of claim 2, wherein: The upper transmission rod is provided with at least two, and the at least two upper transmission rods are symmetrically arranged on the left and right sides of the pressure plate.
4. The fine blanking die of claim 1, wherein: Before the upper die assembly and the lower die assembly perform a die closing action, the lower end surface of the forming punch is higher than the lower end surface of the pressure plate, and the height difference therebetween is 0.4-0.8 mm.
5. The fine blanking die of claim 1, wherein: The middle part of the pressure plate is provided with a through hole, and the forming punch is slidingly arranged in the through hole; the inside of the pressure plate is provided with a first lubricating oil groove, and the first lubricating oil groove communicates with the sliding fit gap between the forming punch and the through hole.
6. The fine blanking die of claim 1, wherein: The lower die assembly comprises a lower die plate and a lower pad, and the die plate, the lower pad and the lower die plate are sequentially fixedly arranged from top to bottom; The lower die assembly further comprises a lower transmission rod, the upper end of the lower transmission rod sequentially penetrates through the lower die and the lower pad and is fixedly connected with the forming counter punch, and the lower transmission rod is slidingly connected with the lower die and the lower pad.
7. The fine blanking die of claim 6, wherein: Each forming counter punch corresponds to at least two lower transmission rods, and the at least two lower transmission rods are respectively connected to the high side and the low side of the stamping surface of the forming counter punch.
8. The fine blanking die of claim 7, wherein: The upper end surface of each lower transmission rod is connected to the forming counter punch in at least two-thirds of the area.
9. The fine blanking die of claim 7, wherein: The middle part of the lower transmission rod is provided with a limiting ring, and the limiting ring is used to abut against the lower pad; when the limiting ring and the lower pad abut against each other, the upper end surface of the forming counter punch and the upper end surface of the die plate are flush with each other.
10. The fine blanking die of claim 7, wherein: The inside of the die plate is provided with a second lubricating oil groove, and the second lubricating oil groove communicates with the sliding fit gap between the forming counter punch and the concave die cavity.