A four-stage progressive stamping die system for fixing tube slots

Abstract

This utility model discloses a four-stage progressive stamping die system for pipe slot fixing clips, comprising four sets of dedicated dies: a blanking die, a first forming die, a second forming die, and a third forming die. It employs a progressive forming process to gradually process 1.5mm galvanized sheet into precision pipe slot fixing clips. The blanking die uses a cold-stamped cast iron precision rear die frame structure to ensure blanking accuracy. The three forming dies utilize a staged bending forming technology to sequentially complete 145° and 65° double bending, R1.25 arc forming, and final R2 arc precision forming, ensuring that the final product dimensional tolerances are strictly controlled within the allowable range. This system solves the technical challenges of springback control and precision maintenance in multi-stage forming of thin sheets, and has significant advantages such as stable forming, good product consistency, and high production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of stamping die technology, and specifically relates to a four-stage progressive stamping die system with a tube groove fixing clip. Background Technology

[0002] In the field of greenhouse installation, pipe groove fixing clips require precise geometric dimensions and stable molding quality. Traditional single-set molds cannot meet the multi-stage molding requirements of such parts, while ordinary multi-mold systems have technical problems such as inaccurate process connection and large cumulative errors.

[0003] The existing technology has the following main shortcomings: 1. Large cumulative error in multi-process molding: In the continuous production process of multiple sets of molds, the inconsistent positioning benchmarks lead to the accumulation of dimensional deviations between processes, resulting in the final product exceeding tolerances.

[0004] 2. Difficulty in controlling springback during thin sheet forming: 1.5mm galvanized sheet exhibits elastic springback during bending, which traditional molds struggle to compensate for precisely, affecting angle and dimensional accuracy.

[0005] 3. Low production efficiency: Long changeover time between molds and complex positioning adjustments affect overall production efficiency.

[0006] 4. Poor product consistency: Due to the lack of systematic molding process planning, deformation in each process affects each other, resulting in fluctuations in product quality.

[0007] Therefore, the above problems urgently need to be solved. Utility Model Content

[0008] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a four-stage progressive stamping die system for tube groove fixing clips. Through scientifically planned process routes and special die design, it solves the problems of precision control, springback compensation and production efficiency in multi-process forming.

[0009] Technical Solution: To achieve the above objectives, this utility model provides a four-stage progressive stamping die system for tube groove fixing clips, comprising: A blanking mold, comprising an upper template and a lower template, wherein the bottom of the upper template is provided with a punch and the bottom of the upper template is also connected to a stripper plate via an elastic rod; and the top of the lower template is provided with a concave mold. The first forming die includes a first upper forming die and a first lower forming die. The bottom of the first upper forming die is a bent stamping head, and the surface of the first lower forming die is a shape that fits the bottom of the first upper forming die. The first lower forming die is provided with a set of first positioning supports. The second forming mold includes a second upper forming mold and a second lower forming mold. The bottom of the second upper forming mold is a second pressure head with an arc that matches the arc of the fixed card. The surface of the second lower forming mold is provided with a second arc-shaped groove that matches the bottom of the second upper forming mold. The second lower forming mold is provided with a set of second positioning backings. The third forming mold includes a third forming upper mold and a third forming lower mold. The bottom of the third forming upper mold is a third pressure head with an arc consistent with the setting of the fixing card. The surface of the third forming lower mold is provided with a third arc-shaped groove that matches the bottom of the third forming upper mold. The third forming lower mold is provided with a set of third positioning backings. The angles of the second and third arc-shaped grooves are both smaller than the preset bending angle of the tube groove fixing clip.

[0010] Furthermore, the bottom of the upper template is provided with a punch fixing plate for fixing the punch, and the bottom of the lower template is fixedly provided with a lower template pad.

[0011] Furthermore, the first upper forming die is provided with a first forming die handle, and the bottom of the first lower forming die is provided with a first forming die fixing base plate. The first forming die handle is mounted on a press, and the first upper forming die is pressed down by the press.

[0012] Furthermore, the second upper forming mold is provided with a second forming mold handle, and the bottom of the second lower forming mold is provided with a second forming mold fixing base plate; The second forming lower die has a recessed relief part on the right side, which forms a relief groove with the second positioning backing on the right side. The relief groove can accommodate the workpiece that has been bent after being processed by the first forming die.

[0013] Furthermore, the third upper forming mold is provided with a third forming mold handle, and the bottom of the third lower forming mold is provided with a third forming mold fixing base plate; The right side of the third forming lower die is provided with a backrest ramp. The workpiece, after being bent in the previous step, rests against the backrest ramp and is positioned by the third positioning backrest.

[0014] Furthermore, the bottom of the first molding upper mold has a double-bend structure.

[0015] Furthermore, the elastic rod is a polyurethane rubber rod, which provides uniform unloading force and prevents the sheet from deforming.

[0016] As can be seen from the above technical solution, this utility model has the following beneficial effects: 1. Progressive molding technology: Through four sets of molds, the material is molded in stages, which effectively disperses material stress, reduces the impact of springback, and improves dimensional stability.

[0017] 2. Unified reference system: Each mold adopts a backing positioning system to ensure consistent reference between processes and reduce cumulative errors.

[0018] 3. Springback compensation design: A springback compensation mechanism is integrated into the second and third forming dies to offset material springback through bending technology, ensuring angular and dimensional accuracy.

[0019] 4. Efficient production process: Each mold has a simple structure and is easy to operate, enabling rapid mold changeover and continuous production. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the material feeding mold described in this utility model; Figure 2 This is a schematic diagram of the structure of the first molding die described in this utility model; Figure 3 This is a schematic diagram of the structure of the second molding die described in this utility model; Figure 4 This is a schematic diagram of the structure of the third molding die described in this utility model; Figure 5 This is a schematic diagram of the structure of the pipe groove fixing clip described in this utility model.

[0021] In the picture: 1- Blanking mold, 11- Upper template, 12- Lower template, 13- Punch, 14- Elastic bar, 15- Stripper plate, 16- Die, 17- Punch fixing plate, 18- Lower template pad; 2-First forming mold, 21-First forming upper mold, 22-First forming lower mold, 23-First positioning support, 24-First forming mold handle, 25-First forming mold base plate; 3-Second forming mold, 31-Second forming upper mold, 32-Second forming lower mold, 33-Second positioning support, 34-Second arc-shaped groove, 35-Second forming mold handle, 36-Second forming mold bottom plate, 37-Allowing part; 4-Third forming mold, 41-Third forming upper mold, 42-Third forming lower mold, 43-Third positioning backrest, 44-Third arc groove, 45-Third forming mold handle, 46-Third forming mold bottom plate, 47-Backrest slope; 5- Pipe groove fixing clip. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0023] In this embodiment, as Figures 1-5 This utility model discloses a four-stage progressive stamping die system for fixing tube slots, comprising: The blanking mold 1 includes an upper template 11 and a lower template 12. The bottom of the upper template 11 is provided with a punch 13, and the bottom of the upper template 11 is also connected to a stripper plate 15 via an elastic rod 14. The top of the lower template 12 is provided with a concave mold 16. The first forming mold 2 includes a first upper forming mold 21 and a first lower forming mold 22. The bottom of the first upper forming mold 21 is a bent stamping head. The surface of the first lower forming mold 22 is a shape that fits the bottom of the first upper forming mold 21. A set of first positioning backings 23 are provided on the first lower forming mold 22. The second forming mold 3 includes a second forming upper mold 31 and a second forming lower mold 32. The bottom of the second forming upper mold 31 is a second pressure head with an arc consistent with the arc of the fixed card. The surface of the second forming lower mold 32 is provided with a second arc-shaped groove 34 that matches the bottom of the second forming upper mold 31. The second forming lower mold 32 is provided with a set of second positioning backings 33. The third forming mold 4 includes a third forming upper mold 41 and a third forming lower mold 42. The bottom of the third forming upper mold 41 is a third pressure head with an arc consistent with the setting of the fixing card. The surface of the third forming lower mold 42 is provided with a third arc-shaped groove 44 that matches the bottom of the third forming upper mold 41. A set of third positioning backings 43 are provided on the third forming lower mold 42. The angles of the second arc-shaped groove 34 and the third arc-shaped groove 44 are both smaller than the preset bending angle of the tube groove fixing clip. For example... Figure 3-5 In the middle, the arc angles on both sides of the tube groove fixing card 5 are α2 and β2, respectively, which correspond to the second arc groove 34 angle α1 and the third arc groove 44 angle β1 respectively, where α1 < α2 and β1 < β2.

[0024] Specifically, the bottom of the upper template 11 is provided with a punch fixing plate 17 for fixing the punch 13, and the bottom of the lower template 12 is fixedly provided with a lower template pad 18.

[0025] The first upper forming mold 21 is provided with a first forming mold handle 24, and the bottom of the first lower forming mold 22 is provided with a first forming mold fixing base plate 25.

[0026] Specifically, the second upper forming mold 31 is provided with a second forming mold handle 35, and the bottom of the second lower forming mold 32 is provided with a second forming mold fixing base plate 36; The second forming lower mold 32 has a recessed relief part 37 on the right side, and the relief part 37 and the second positioning backing 33 on the right side form a relief groove.

[0027] Specifically, the third upper forming mold 41 is provided with a third forming mold handle 45, and the bottom of the third lower forming mold 42 is provided with a third forming mold fixing base plate 46; The third molding lower mold 42 is provided with a backrest ramp 47 on its right side.

[0028] Specifically, the bottom of the first molding upper mold 21 has a double-bend structure.

[0029] Specifically, the elastic rod 14 is a polyurethane rubber rod.

[0030] The working process of this utility model's four-stage progressive stamping die system for fixing tube slots is as follows, please refer to it here. Figures 1-4 : The upper template 11 of the blanking mold 1 is connected to the press slide. During operation, a 1.5mm galvanized sheet is placed in the positioning position, the press moves downward to complete the blanking, the elastic rod 14 pushes the stripper plate 15 to remove the waste material from the punch 13, and the finished product is discharged from the cavity of the die 16.

[0031] The first forming upper die 21 is mounted on the press via the first forming die shank 24, and the first forming lower die 22 is fixed on the worktable. The first positioning backing 23 precisely positions the unloaded semi-finished product, and the first forming upper die 21 forms a double bend of 145° and 65° in sequence as it descends.

[0032] Based on the initial molding, a 6mm straight edge and a 1.25 R1 arc are formed on one side by replacing the dedicated second molding upper mold 31; then, the third molding upper mold 31 is replaced to form a 6mm straight edge and a 2 R2 arc on the other side. During the arc formation process, since the angles of the second arc-shaped groove 34 and the third arc-shaped groove 44 are both smaller than the preset bending angle of the tube groove fixing clip, the material springback is offset by the bending technique, ensuring the accuracy of angles and dimensions.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A four-stage progressive stamping die system for fixing tube slots, characterized in that: include: The blanking mold (1) includes an upper template (11) and a lower template (12). The bottom of the upper template (11) is provided with a punch (13), and the bottom of the upper template (11) is also connected to a stripper plate (15) via an elastic rod (14). The top of the lower template (12) is provided with a concave mold (16). The first forming mold (2) includes a first forming upper mold (21) and a first forming lower mold (22). The bottom of the first forming upper mold (21) is a bent stamping head, and the surface of the first forming lower mold (22) is a shape that fits the bottom of the first forming upper mold (21). A set of first positioning backings (23) are provided on the first forming lower mold (22). The second molding die (3) includes a second upper molding die (31) and a second lower molding die (32). The bottom of the second upper molding die (31) is a second pressure head with an arc consistent with the arc of the fixed card. The surface of the second lower molding die (32) is provided with a second arc-shaped groove (34) that matches the bottom of the second upper molding die (31). The second lower molding die (32) is provided with a set of second positioning backings (33). The third forming mold (4) includes a third forming upper mold (41) and a third forming lower mold (42). The bottom of the third forming upper mold (41) is a third pressure head with an arc consistent with the setting of the fixing card. The surface of the third forming lower mold (42) is provided with a third arc-shaped groove (44) that matches the bottom of the third forming upper mold (41). The third forming lower mold (42) is provided with a set of third positioning backings (43). The angles of the second arc-shaped groove (34) and the third arc-shaped groove (44) are both smaller than the preset bending angle of the tube groove fixing card.

2. The four-stage progressive stamping die system for fixing a tube groove as described in claim 1, characterized in that: The bottom of the upper template (11) is provided with a punch fixing plate (17) for fixing the punch (13), and the bottom of the lower template (12) is provided with a lower template pad (18).

3. The four-stage progressive stamping die system for fixing a tube groove as described in claim 1, characterized in that: The first upper forming mold (21) is provided with a first forming mold handle (24), and the bottom of the first lower forming mold (22) is provided with a first forming mold fixing base plate (25).

4. The four-stage progressive stamping die system for fixing a tube groove as described in claim 1, characterized in that: The second upper forming mold (31) is provided with a second forming mold handle (35), and the bottom of the second lower forming mold (32) is provided with a second forming mold fixing base plate (36). The second molding lower mold (32) has a recessed relief part (37) on the right side, and the relief part (37) and the second positioning backing (33) on the right side form a relief groove.

5. The four-stage progressive stamping die system for fixing a tube groove according to claim 1, characterized in that: The third upper forming mold (41) is provided with a third forming mold handle (45), and the bottom of the third lower forming mold (42) is provided with a third forming mold fixing base plate (46). The third molding lower mold (42) is provided with a backrest ramp (47) on the right side.

6. The four-stage progressive stamping die system for fixing a tube groove according to claim 1, characterized in that: The bottom of the first molding upper mold (21) has a double-bend structure.

7. The four-stage progressive stamping die system for fixing a tube groove according to claim 1, characterized in that: The elastic rod (14) is a polyurethane rubber rod.

Images