Electric cabinet part thick material one-step bending stamping die structure
Through the one-step bending stamping mold structure and the design of nitrogen cylinder floating material plate, the complex and cost-effective development of thick molds in existing electrical cabinet parts is solved, and an efficient and low-cost forming process is achieved, and product quality is improved.
Patent Information
- Application Number
- CN202421352757.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The mold development of existing electrical cabinet parts thick materials requires two steps of bending, resulting in complex processes and high mold development costs, and increasing difficulty in controlling material size.
The one-step bending stamping mold structure is adopted, through the fixed connection between the upper mold seat and the bent block, combined with the design of the nitrogen cylinder and the floating material plate, the one-step bending and forming of the material is realized, and the design of the bent punch and wear-resistant plate reduces friction and avoids scratches during the forming process.
One-step bending forming is achieved, which reduces the cost of mold development, simplifies the process flow, improves product quality, and effectively avoids scratch problems in the material during the forming process.
Smart Images
Figure CN222625960U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of parts processing moulds, in particular to a one-step bending and stamping mould structure for thick material of electric cabinet parts. Background Art
[0002] An electrical cabinet is a box or rack used to manage, protect, control, distribute and detect electrical equipment, usually containing components and equipment such as switches, fuses, cables, sockets, torque, etc. The main function of an electrical cabinet is to manage and control electrical equipment or systems, and to protect personnel and equipment from accidents. In addition, electrical cabinets can also effectively control the distribution and use of electrical energy, and enhance the safety and reliability of the power system.
[0003] The existing electrical cabinet parts are stamped materials with a thickness of 3mm and a length of 1000mm. The U-shaped bending parts of high-strength materials have a very complex shape. Due to the specific matching relationship, the dimensional tolerance of the workpiece is relatively small, and the overall flatness of the assembly tolerance material is 0.4. The overall U-shaped opening size should be controlled within ±0.2mm.
[0004] For ordinary mold development, two-step bending is generally used to ensure the angle and opening size of the material. Since the annual demand for domestic production of this imported material is not large, it is necessary to reduce the development cost of the mold. From a process perspective, it is necessary to reduce a set of molds to save mold development costs, but the difficulty of material size control is significantly increased. Utility Model Content
[0005] In view of the deficiencies in the prior art, the utility model provides a one-step bending stamping die structure for thick material of electric cabinet parts, which solves the problems raised in the above-mentioned background technology.
[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a one-step bending stamping die structure for thick materials of electrical cabinet parts, including an upper die seat, a bending block for bending is arranged in the middle of the bottom end of the upper die seat, and knives for limiting are symmetrically distributed on the left and right ends of the bending block, and upper limit columns and lower limit columns are arranged at the ends of the two groups of knives, and a bending punch is arranged on one side of each of the knives close to the bending block, a wear-resistant plate for support and friction is arranged under one of the bending punches, and a bending punch base for support is arranged under the other bending punch.
[0007] A further improvement of the technical solution of the utility model is that: the upper die seat is fixedly connected to the bending block, and the two knives are limitedly connected to the upper die seat by fasteners, the upper limit column is installed at the bottom of the upper die seat, and the two bending punches are movably connected to the wear-resistant plate and the bending punch base correspondingly arranged below, and the wear-resistant plate and the bending punch base are respectively provided with corresponding abutting side stop blocks on the side away from the bending block.
[0008] A further improvement of the technical solution of the utility model is that a lower die seat is arranged below the upper die seat, a lifting slot seat is arranged at the same longitudinal position of the lower die seat and the bending block, a nitrogen cylinder for popping up is arranged on the lifting slot seat, a push rod is arranged on the top of the nitrogen cylinder, a floating plate for placing the workpiece to be processed is arranged on the top of the push rod, and materials are arranged on the floating plate.
[0009] The material is placed on the floating plate of the lower die to determine the position. When the upper die seat starts to press down and the bending block contacts the material, the punching force passes through the floating plate, the ejector rod, and the nitrogen cylinder. The nitrogen cylinder starts to work, so the force of the nitrogen cylinder is greater than the pressing force of the material.
[0010] The upper die seat continues to move downward. Under the force of the bending block, the material, floating plate, push rod, and the piston of the nitrogen cylinder that moves downward begin to compress. When the material moves downward and contacts the bending punch, the bending punch on one side withdraws toward the knife and slides in the bending punch base, and the bottom surface of the bending punch on the other side is supported by a wear-resistant plate and can rub. The bending punch retreats to both sides to the side stop block. At this time, the gap between the bending punch and the bending block is greater than one material thickness. This is the key to the first step of forming. Different from ordinary bending, a gap greater than one material thickness can prevent the bending punch and the material from having such a large friction during relative movement, and the material is not prone to scratches during the forming process.
[0011] A further improvement of the technical solution of the utility model is that the wear-resistant plate and the bending punch base are symmetrically arranged on the lower die seat on both sides of the floating plate, the lower limit column is located on the lower die seat, and an outer guide column assembly for guiding is arranged between the upper die seat and the lower die seat.
[0012] The upper die continues to move downward, and when the bending punch begins to contact the knife, the bending punch not only moves vertically relative to the material, but also moves toward the middle under the force of the knife slope, until the floating plate contacts the lower die seat and the bending block and the bending punch have a gap of exactly the thickness of the material. The negative angles released on the sides of the bending block and the bending punch can easily solve the problem of springback and the problem of negative return angles. The material angle adjustment only needs to adjust the height of the knife, and the mold adjustment becomes easier. It effectively solves the side scratches and product angle springback of the one-step bending, and it is relatively easy to ensure the product forming tolerance, thereby saving mold costs and improving product quality.
[0013] A further improvement of the technical solution of the utility model is that: in order to ensure the bending stability of the entire device, a nitrogen cylinder fixed pad for buffering and protection is arranged between the nitrogen cylinder and the lifting slot seat, and pads for support are symmetrically distributed at both ends of the bottom of the lower mold seat, and the bottom of the two groups of pads and the bottom of the lifting slot seat are provided with support plates.
[0014] The further improvement of the technical solution of the utility model is that: the two ends of the floating material plate are provided with guide fixing seats, and the tops of the two guide fixing seats are provided with limit cover plates for limiting, and the floating material plate slides in the two groups of guide fixing seats. In order to ensure the positioning accuracy between the floating material plate and the material, the floating material plate is provided with several groups of positioning holes corresponding to the material. Preferably, in the mold opening state, the nitrogen cylinder piston is in a pop-up state, and the push rod and the floating material plate are lifted up at the same time. The floating material plate can slide freely up and down in the guide fixing seats at both ends and the accuracy can be guaranteed. The control stroke is the same as the compression stroke of the nitrogen cylinder within the range of the limit cover plate, and a gap is placed in the vertical direction so that the nitrogen cylinder is not subjected to force in the mold opening state.
[0015] The purpose of setting the positioning holes corresponding to the materials on the floating plate is that when the material is a long strip of parts to be stamped, the previous process part is a flat material and has the positioning holes required by this process. Therefore, the material has an accurate position in the mold. The material is placed on the floating plate and there are two positioning holes corresponding to the material, ensuring the accuracy of the relative position.
[0016] Beneficial Effects
[0017] The utility model provides a one-step bending stamping die structure for thick material of electric cabinet parts. Compared with the prior art, it has the following beneficial effects:
[0018] 1. The one-step bending stamping die structure of the thick material of the electric cabinet parts, during the bending process, the bending punch on one side withdraws toward the knife direction and slides in the bending punch base, and the bottom surface of the bending punch on the other side rubs against the wear-resistant plate. The bending punch retreats to both sides to the side stop block, and the gap formed by the bending punch and the bending block is greater than the thickness of the material, so that the bending punch and the material do not have such a large friction during relative movement, and the material is not easy to produce scratches during the forming process.
[0019] 2. The one-step bending stamping die structure for thick materials of the electric cabinet parts can solve the problem of springback and negative return angle by releasing negative angles on the sides of the bending block and the bending punch. The angle adjustment of the material only needs to adjust the height of the knife, and the die adjustment becomes easier. It effectively solves the side scratches and product angle springback of the one-step bending, and it is relatively easy to ensure the production forming tolerance, thereby saving mold costs and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a front view of an embodiment of the utility model;
[0021] Figure 2 Schematic diagram of the structure of the lower mold in this embodiment;
[0022] Figure 3 It is the main cross-sectional view of the mold structure.
[0023] In the figure: 1. upper die seat; 2. bending block; 3. knife; 4. upper limit column; 5. lower limit column; 6. outer guide column assembly; 7. material; 8. bending punch; 9. wear-resistant plate; 10. floating plate; 11. bending head base; 12. side stop block; 13. lower die seat; 14. ejector rod; 15. nitrogen cylinder; 16. nitrogen cylinder fixing pad; 17. pad; 18. support plate; 19. guide fixing seat; 20. limit cover plate. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] The utility model provides three technical solutions:
[0026] Figure 1-3 The first embodiment is shown: a one-step bending stamping die structure for thick materials of electric cabinet parts, including an upper die base 1, a bending block 2 for bending is arranged in the middle of the bottom end of the upper die base 1, and knives 3 for limiting are symmetrically distributed on the left and right ends of the bending block 2, and upper limit columns 4 and lower limit columns 5 are arranged at the ends of two groups of knives 3, and a bending punch 8 is arranged on the side of each knife 3 close to the bending block 2, a wear-resistant plate 9 for support and friction is arranged under one of the bending punches 8, and a bending punch base 11 for support is arranged under the other bending punch 8.
[0027] The upper die base 1 is fixedly connected to the bending block 2, and the two knives 3 are limitedly connected to the upper die base 1 by fasteners. The upper limit column 4 is installed at the bottom of the upper die base 1. The two bending punches 8 are movably connected to the wear-resistant plate 9 and the bending punch base 11 correspondingly arranged below. The wear-resistant plate 9 and the bending punch base 11 are respectively provided with corresponding side stop blocks 12 on the side away from the bending block 2.
[0028] Figure 2-3 A second embodiment is shown, which mainly differs from the first embodiment in that a lower die base 13 is arranged below the upper die base 1, a lifting slot base is arranged at the same longitudinal position of the lower die base 13 and the bending block 2, a nitrogen cylinder 15 for popping up is arranged on the lifting slot base, a push rod 14 is arranged on the top of the nitrogen cylinder 15, a floating plate 10 for placing the workpiece to be processed is arranged on the top of the push rod 14, and a material 7 is arranged on the floating plate 10.
[0029] The material is placed on the floating plate 10 of the lower die to determine the position. When the upper die seat 1 starts to press the bending block 2 to contact the material 7, the punching force passes through the floating plate 10, the ejector rod 14, and the nitrogen cylinder 15. The nitrogen cylinder 15 starts to work, so the force of the nitrogen cylinder 15 is greater than the pressing force of the material.
[0030] The upper die seat 1 continues to move downward. Under the action of the bending block 2, the material 7, the floating plate 10, the push rod 14, and the force piston of the downward moving nitrogen cylinder 15 begin to compress; when the material 7 moves downward and contacts the bending punch 8, the bending punch 8 on one side withdraws toward the knife 3 and slides in the base of the bending punch 11, and the bottom surface of the bending punch 8 on the other side is supported by the wear-resistant plate 9 and can rub. The bending punch 8 retreats to both sides to the side stop block 12. At this time, the gap between the bending punch 8 and the bending block 2 is greater than one material thickness. This is the key to the first step of forming. Different from ordinary bending, a gap greater than one material thickness can make the bending punch 8 and the material 7 not have such a large friction during relative movement, and the material 7 is not easy to produce scratches during the forming process.
[0031] The wear-resistant plate 9 and the bending punch base 11 are symmetrically arranged on the lower die base 13 on both sides of the floating plate 10, and the lower limit column 5 is located on the lower die base 13, wherein an outer guide column assembly 6 for guiding is arranged between the upper die base 1 and the lower die base 13.
[0032] The upper die continues to move downward, and when the bending punch 8 begins to contact the knife 3, the bending punch 8 not only moves vertically relative to the material 7, but also moves toward the middle under the action of the inclined surface of the knife 3, until the floating plate 10 and the lower die seat 13 are in contact, and there is just a gap of the thickness of the material 7 between the 2 bending blocks and the bending punch 8. The negative angles of the bending block 2 and the bending punch 8 are released on the sides, which can easily solve the rebound and the problem of the negative angle of the return stroke. The angle adjustment of the material only needs to adjust the height of the knife 3, and the mold adjustment becomes easier, which effectively solves the side scratches and product angle rebound of the one-step bending, and is relatively easy to ensure the forming tolerance, thereby saving mold costs and improving product quality.
[0033] Figure 3 A third embodiment is shown, which mainly differs from the first embodiment in that, in order to ensure the bending stability of the entire device, nitrogen cylinder fixed feet 16 for buffering and protection are arranged between the nitrogen cylinder 15 and the lifting slot seat, and feet 17 for support are symmetrically distributed at both ends of the bottom of the lower mold seat 13, and support plates 18 are arranged at the bottom of the two groups of feet 17 and the bottom of the lifting slot seat.
[0034] Guide fixing seats 19 are provided at both ends of the floating plate 10, and a limiting cover plate 20 for limiting is provided on the top of the two guide fixing seats 19, and the floating plate 10 slides in the two groups of guide fixing seats 19. To ensure the positioning accuracy between the floating plate 10 and the material 7, a plurality of positioning holes corresponding to the material 7 are provided on the floating plate 10. Preferably, in the mold opening state, the piston of the nitrogen cylinder 15 is in a pop-up state, and the push rod 14 and the floating plate 10 are lifted up at the same time. The floating plate 10 can slide freely up and down in the guide fixing seats 19 at both ends and the accuracy can be ensured. The control stroke is the same as the compression stroke of the nitrogen cylinder 15 within the range of the limiting cover plate 20, and a gap is placed in the vertical direction so that the nitrogen cylinder 15 is not subjected to force in the mold opening state.
[0035] The purpose of setting the positioning holes corresponding to the material 7 on the floating plate 10 is that when the material 7 is a long strip of parts to be stamped, the previous process part is a flat material and has the positioning holes required by this process. Therefore, the material has an accurate position in the mold. The material is placed on the floating plate 10 and there are two positioning holes corresponding to the material, ensuring the accuracy of the relative position.
[0036] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A one-step bending stamping die structure for thick material of electric cabinet parts, comprising an upper die base (1), characterized in that: A bending block (2) for bending is arranged in the middle of the bottom end of the upper die seat (1), and knives (3) for limiting are symmetrically distributed on the left and right ends of the bending block (2), and upper limit columns (4) and lower limit columns (5) are arranged at the ends of the two groups of knives (3), and a bending punch (8) is arranged on the side of each of the knives (3) close to the bending block (2), and a wear-resistant plate (9) for support and friction is arranged below one of the bending punches (8), and a bending punch base (11) for support is arranged below the other bending punch (8).
2. The one-step bending stamping die structure for thick material of electric cabinet parts according to claim 1 is characterized in that: The upper die base (1) is fixedly connected to the bending block (2), and the two knives (3) are both connected to the upper die base (1) by fasteners, the upper limit column (4) is installed at the bottom of the upper die base (1), and the two bending punches (8) are movably connected to the wear-resistant plate (9) and the bending punch base (11) correspondingly arranged below, and the wear-resistant plate (9) and the bending punch base (11) are respectively provided with corresponding side stop blocks (12) on the side away from the bending block (2).
3. The one-step bending stamping die structure for thick material of electric cabinet parts according to claim 1 is characterized in that: A lower die seat (13) is arranged below the upper die seat (1); a lifting slot seat is arranged at the same longitudinal position of the lower die seat (13) and the bending block (2); a nitrogen cylinder (15) for popping up is arranged on the lifting slot seat; a push rod (14) is arranged on the top of the nitrogen cylinder (15); a floating plate (10) for placing a workpiece to be processed is arranged on the top of the push rod (14); and a material (7) is arranged on the floating plate (10).
4. The one-step bending stamping die structure for thick material of electric cabinet parts according to claim 3 is characterized in that: The wear-resistant plate (9) and the bending punch base (11) are symmetrically arranged on the lower die seat (13) on both sides of the floating plate (10), and the lower limit column (5) is located on the lower die seat (13), wherein an outer guide column assembly (6) for guiding is arranged between the upper die seat (1) and the lower die seat (13).
5. The one-step bending stamping die structure for thick material of electric cabinet parts according to claim 4 is characterized in that: A nitrogen cylinder fixing foot (16) for buffering and protection is arranged between the nitrogen cylinder (15) and the lifting slot seat, and foot pads (17) for support are symmetrically distributed at both ends of the bottom of the lower mold seat (13), and a support plate (18) is arranged at the bottom of the two groups of foot pads (17) and the bottom of the lifting slot seat.
6. The one-step bending stamping die structure for thick material of electric cabinet parts according to claim 3 is characterized in that: The floating plate (10) is provided with guide fixing seats (19) at both ends, and the tops of the two guide fixing seats (19) are provided with limiting cover plates (20) for limiting, and the floating plate (10) slides in the two groups of guide fixing seats (19), and the floating plate (10) is provided with a plurality of groups of positioning holes corresponding to the materials (7).