A composite mold structure suitable for bending parts

Abstract

The present invention discloses a composite mold structure suitable for bending parts, comprising an upper mold part, a lower mold part and a base part; the upper mold part comprises a blanking assembly, a punching assembly and an upper mold elastic assembly; the blanking assembly passes through the punching assembly and can move relative to the upper mold elastic assembly; the lower mold part comprises a lower mold fixed part and a lower mold sliding part; the lower mold fixed part passes through the lower mold sliding part and can move relative to the base part; the blanking assembly also comprises an upper punch core; the punching assembly also comprises an upper die; the lower mold fixed part also comprises a lower punch; the lower punch and the upper die are adapted to cut out the shape of the part, and the lower punch cooperates with the upper punch core to complete the bending of the part. The beneficial effect of the present invention is that, since the blanking and bending processes are combined together, qualified parts can be punched out in one go; punching in one go avoids the defect of non-coincidence of the mold bases, while saving mold costs, processing hours, labor costs, and reducing machine tool occupancy.

Description

Technical Field

[0001] The invention relates to a die structure, in particular to a blanking, bending and back-punching composite die structure with curvature of the punched part. Background Art

[0002] Punched parts often have relatively simple shapes but also incorporate curved structures. Typically, two or more stamping steps are used to complete the part: first, the outer shape is punched out, and then the outer shape is used to position the bend. This approach reduces the processing difficulty of each step, but it also results in wasted labor, increased machine tool and labor usage, and higher mold costs. Furthermore, due to the step-by-step punching process, problems such as inconsistent secondary positioning datums and deviations in part contours can occur in terms of precision.

[0003] If the above situation occurs with the existing structure, the repeated repair process will not only cause the original mold precision to be lost, but also increase the processing cost and assembly time exponentially. This is especially prone to occur when the part has small dimensions and high contour requirements, often resulting in the scrapping of the mold and part.

[0004] Figure 1 This is a schematic diagram of an existing mold structure. Using this die structure for blanking, the first step is to cut out the part's shape. Then, the bending equipment or tooling is replaced and the part is bent in steps using shape positioning. The secondary positioning during bending increases relative positioning errors and can damage the part's shape. This makes it unsuitable for applications requiring high surface finish. Step-by-step blanking wastes work time, and secondary positioning can cause errors in the part's positioning reference, resulting in a high repair workload. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a composite mold structure with high mold punching precision, reduced number of tooling used, and reduced cost and processing time.

[0006] The technical solution adopted by the present invention is a composite mold structure suitable for bending parts, comprising an upper mold part, a lower mold part, and a base part; the upper mold part comprises a blanking assembly, a punching assembly, and an upper mold elastic assembly; the blanking assembly passes through the punching assembly and can move relative to the upper mold elastic assembly;

[0007] The lower mold part includes a lower mold fixed part and a lower mold sliding part; the lower mold fixed part passes through the lower mold sliding part and can move relative to the base part;

[0008] The blanking assembly further includes an upper punch core;

[0009] The punching assembly also includes an upper die; the lower die fixed part also includes a lower punch; the lower punch and the upper die are adapted to cut out the shape of the part, and the lower punch cooperates with the upper punch core to complete the bending of the part.

[0010] The blanking assembly includes an upper ejector rod and an upper knocking rod;

[0011] The blanking assembly includes an upper punch core, an upper die and an upper die base;

[0012] The upper mold elastic component includes an adjustment device and an elastic device;

[0013] The upper die base is fixed to the upper die as a whole, and the upper punch core, the adjusting device and the elastic device are installed in the cavity of the upper die.

[0014] The lower die fixing part includes a lower fixing plate, a slider and a lower punch;

[0015] The lower die sliding part includes a lower guide plate and a lower die base;

[0016] The base portion includes a base, a sleeve and an elastic layer;

[0017] The lower die base is fixed as a whole with the lower guide plate, the lower punch and the lower fixed plate are respectively fixed as a whole with the slider, the slider and the base are fixedly installed in the lower die base; the elastic layer is installed between the base and the lower die base, and the sleeve can slide downward in the base.

[0018] The elastic layer is a spring, fabric, rubber and / or silicone.

[0019] The angles of the bent punch at the lower end of the convex core of the upper punch supporting core and the concave core of the lower punch are adapted to the processed parts, and the angles are determined according to the processed parts.

[0020] The angle between the lower end of the convex core of the upper punch supporting core and the concave core of the lower punch is greater than or equal to 90 degrees.

[0021] The adjusting device in the upper mold elastic component is an adjusting block, and the elastic device is a rectangular spring; the adjusting block is composed of a plurality of adjusting sheets of the same thickness, and the increase or decrease of the adjusting block can adjust the bending force and control the bending quality.

[0022] When the adjusting block is thickened, the preload force of the rectangular spring becomes larger and the pressing force becomes larger; when the adjusting block is thinned, the corresponding compression amount of the rectangular spring becomes smaller and the pressing force becomes smaller.

[0023] The upper die elastic component includes an adjusting nut and a rectangular spring. When the adjusting nut is tightened downward, the pre-tightening force of the rectangular spring increases, and the pressing force gradually increases.

[0024] The cooperation of the upper concave die, the lower punch and the upper punch core is completed at one time.

[0025] The beneficial effect of the present invention is that, since the blanking and bending processes are combined together, qualified parts can be punched out in one go; punching in one go avoids the defect of non-overlapping mold datums, while saving mold costs, processing hours, labor costs, and reducing machine tool occupancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the existing mold structure;

[0027] Figure 2 Schematic diagram of the processed parts;

[0028] Figure 3 Schematic diagram of the mold structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the upper mold structure of the present invention;

[0030] Figure 5 Schematic diagram of a second embodiment of the upper mold structure of the present invention;

[0031] Figure 6 It is a schematic diagram of the lower mold structure of the present invention.

[0032] In the picture:

[0033] 1: Upper ejector 2: Upper punch core 3: Upper punch rod 4: Lower fixed plate

[0034] 5: Slider 6: Elastic layer 7: Base 8: Adjustment block

[0035] 8': Adjusting nut 9: Rectangular spring 10: Upper die base 11: Upper die

[0036] 12: Lower guide plate 13: Lower punch 14: Lower die base 15: Sleeve. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0038] like Figures 3 to 5As shown, the present invention provides a composite mold structure suitable for bending parts, comprising an upper mold part, a lower mold part, and a base part; the upper mold part comprises: a blanking assembly, a punching assembly, and an upper mold elastic assembly. The blanking assembly passes through the punching assembly and can move relative to the upper mold elastic assembly. The blanking assembly comprises an upper ejector rod 1 and an upper punching rod 3; the punching assembly comprises an upper punch core 2, an upper die 11, and an upper mold base 10. The upper mold elastic assembly comprises an adjustment device and an elastic device; the upper mold base 10 is fixed to the upper die 11 as a whole, and the upper punch core 2, the adjustment device, and the elastic device are installed in the cavity of the upper die 11. The upper mold elastic assembly is the pressing force required for bending the part. The adjustment device in the upper mold elastic assembly is an adjustment block 8, and the elastic device is a rectangular spring 9; the adjustment block 8 is composed of a plurality of adjustment sheets of the same thickness. The increase or decrease of the adjustment block can adjust the bending force and control the bending quality. That is, as the adjusting block 8 becomes thicker, the preload of the rectangular spring 9 becomes larger and the pressing force becomes larger; as the adjusting block 8 becomes thinner, the corresponding compression of the rectangular spring 9 becomes smaller and the pressing force becomes smaller. Figure 5 As the adjusting nut 8' in the figure is tightened downward, the preload force of the rectangular spring 9 increases, and the pressing force gradually increases.

[0039] The die is a composite back-punch structure. The upper die 11 is fixed to the upper die base 10 with screws and pins, and the lower guide plate 12 and the slider 5 are mounted on the lower die base 14. During blanking, the lower punch 13 cooperates with the upper die 11 to punch out part of the part's shape. The lower punch 13 cooperates with the upper die core 2 to complete the part's bending. The lower punch 13 then cooperates with the upper die 11 to punch out another part of the part's shape.

[0040] The lower die portion includes a fixed lower die portion and a sliding lower die portion. The fixed lower die portion passes through the sliding lower die portion and is capable of relative motion with the base portion. The fixed lower die portion includes a lower fixed plate 4, a slider 5, and a lower punch 13; the sliding lower die portion includes a lower guide plate 12 and a lower die base 14; the base portion includes a base 7, a sleeve 15, and an elastic layer 6. The lower die base 14 is integrally fixed to the lower guide plate 12, the lower punch 13 and the lower fixed plate 4 are each integrally fixed to the slider 5, and the slider 5 and base 7 are fixedly mounted within the lower die base 14 via bolts. The elastic layer 6 is mounted between the base 7 and the lower die base 14. The lower punch 13 and the upper die 11 cooperate to cut out the part's shape, and the lower punch 13 cooperates with the upper die core 2 to complete the part's bending. The sleeve 15 is capable of sliding downward within the base 7. The elastic layer 6 is made of an elastic material with a high resilience, such as a spring, fabric, rubber, and / or silicone.

[0041] Figure 4Schematic diagram of the upper die structure of the present invention. When the upper die moves downward, the upper die 11 and the lower punch 13 complete the step-by-step blanking of the part. The upper punch core 2 is installed in the upper die 11 and completes the bending action with the lower punch 13 under the action of the preload force of the rectangular spring 9.

[0042] Figure 6 Schematic diagram of the lower die structure of the present invention. Slider 5, mounted within lower die holder 14, is bolted to base 7. Therefore, lower fixed plate 4 and lower punch 13, connected to slider 5, do not move. When the lower die descends, upper die 11 presses against lower guide plate 12, pushing lower die holder 14 along the guide portion of slider 5. Lower guide plate 12, fixed to lower die holder 14, slides relative to lower punch 13, pushing sleeve 15 downward within base 7. The upper and lower dies close, completing one pass of part processing.

[0043] The processed parts such as Figure 2 As shown, the angle is greater than or equal to 90 degrees. The angle of the lower end bending punch of the upper punch core 2 and the lower punch core 13 is designed according to the part angle. The angle of the lower end bending punch of the upper punch core 2 and the lower punch core 13 is greater than or equal to 90 degrees.

[0044] This patent uses the case where the part angle is 90° as an example for design.

[0045] The working method of the present invention is as follows: when processing the above-mentioned bent parts, the operator operates the equipment, the punch press moves downward, the upper die part moves downward, and presses the lower die part, wherein the upper die 11, the lower punch 13, and the upper punch core 2 of the component cooperate with each other to complete the part processing at one time. Specifically and detailedly decomposed, the process is as follows: the upper die moves downward, and when it contacts the material, the upper punch rod 3 and the upper punch core 2 retract successively. When the lower plane of the upper die 11 contacts the upper plane of the lower guide plate 12, the lower guide plate 12 together with the lower die seat 14 slides downward on the slider 5 fixed to the base 7, the elastic layer 6 begins to compress, the sleeve 15 slides down in the base 7, and the lower punch 13 cooperates with the upper die 11 to punch out the left and right ends of the part; the upper and lower dies continue to move downward, the elastic layer 6 continues to compress, and the lower punch 13 and the upper punch core 2 The core 2 cooperates with the preload force of the rectangular spring 9 to complete the bending action of the part, and then the lower punch 13 continues to cooperate with the upper die 11 to complete the cutting of the middle part of the part; after completing one stroke, the punch press drives the upper die to rise, and the rectangular spring 9 rebounds to push the upper punch core 2 to push the part out of the upper die 11. When the upper die rises to the punching beam, the upper push rod 1 is knocked down, pushing the punching rod 3 to remove the bent part from the upper punch core 2, and the part punching is completed; at the same time, the elastic layer 6 also gradually rebounds, and the lower die rises back to its original position.

[0046] It is worth pointing out that the protection scope of the present invention is not limited to the above-mentioned specific examples. According to the basic technical concept of the present invention, basically the same structure can also be used to achieve the purpose of the present invention. As long as ordinary technicians in this field can think of implementation methods without creative work, they all fall within the protection scope of the present invention.

Claims

1. A composite mold structure suitable for bending parts, comprising an upper mold portion, a lower mold portion, and a base portion; The upper die part includes a blanking component and an upper die elastic component; The lower mold part includes a lower mold fixed part and a lower mold sliding part; the lower mold fixed part passes through the lower mold sliding part, and the lower mold sliding part can move relative to the base part; It is characterized by: The punching assembly comprises an upper punch core (2), an upper die (11) and an upper die base (10), wherein the upper die (11) is fixed to the upper die base (10); the upper punch core (2) and the upper die elastic assembly are installed in the cavity of the upper die (11); The lower die fixed part includes a lower punch (13); the upper die (11), the lower punch (13), and the upper punch core (2) cooperate with each other to complete part processing at one time; When the upper die portion moves downward, the lower die sliding portion slides relatively along the lower punch (13), so that the lower punch (13) and the upper die (11) are adapted to punch out the left and right end portions of the part, cooperate with the upper punch core (2) to complete the bending of the part, and continue to cooperate with the upper die (11) to complete the cutting of the middle portion of the part.

2. The composite mold structure suitable for bending parts according to claim 1, characterized in that: The upper die part also includes a blanking assembly, which passes through the punching assembly and can move relative to the upper die elastic assembly; The blanking assembly comprises an upper ejector rod (1) and an upper punching rod (3); the upper die portion rises to the punching beam, the upper ejector rod (1) is knocked down, and the upper punching rod (3) is pushed to remove the part; The upper mold elastic component includes an adjusting device and an elastic device.

3. The composite mold structure suitable for bending parts according to claim 1, characterized in that: The lower mold fixing part also includes a lower fixing plate (4) and a slider (5); The lower die sliding portion includes a lower guide plate (12) and a lower die base (14); The base portion comprises a base (7), a sleeve (15) and an elastic layer (6); The lower die base (14) is fixed to the lower guide plate (12) as a whole, the lower punch (13) and the lower fixed plate (4) are fixed to the slider (5) as a whole, and the slider (5) is located in the lower die base (14) and fixedly mounted on the base (7); The elastic layer (6) is installed between the base (7) and the lower die base (14), and the sleeve (15) can slide downward in the base (7).

4. The composite mold structure suitable for bending parts according to claim 3, characterized in that: The elastic layer (6) is a spring, fabric, rubber and / or silicone; after processing is completed, the elastic layer (6) gradually rebounds, and the lower mold sliding part rises and returns to its original position.

5. The composite mold structure suitable for bending parts according to claim 1, characterized in that The lower end of the convex core of the upper punch core (2) is bent into a convex die, and the concave core of the lower punch (13) is adapted to the processed parts.

6. The composite mold structure suitable for bending parts according to claim 2, characterized in that: When the upper die moves downward and contacts the material, the upper punch rod (3) and the upper punch core (2) retract first.

7. The composite mold structure suitable for bending parts according to claim 2, characterized in that: The adjusting device in the upper die elastic component is an adjusting block (8), and the elastic device is a rectangular spring (9); the adjusting block (8) is composed of a plurality of adjusting sheets of the same thickness, and the increase or decrease of the adjusting block can adjust the bending force.

8. The composite mold structure suitable for bending parts according to claim 7, characterized in that When the adjusting block (8) is thickened, the preload force of the rectangular spring (9) becomes larger, and the pressing force becomes larger; when the adjusting block (8) is thinned, the corresponding compression amount of the rectangular spring (9) becomes smaller, and the pressing force becomes smaller.

9. The composite mold structure suitable for bending parts according to claim 1, characterized in that The upper die elastic component comprises an adjusting nut (8') and a rectangular spring (9). When the adjusting nut (8') is tightened downward, the pre-tightening force of the rectangular spring (9) increases, and the pressing force gradually increases.

10. The composite mold structure suitable for bending parts according to claim 5, characterized in that: The angle between the lower end of the convex core of the upper punch core (2) and the concave core of the lower punch (13) is greater than or equal to 90 degrees.

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