Stamping and shaping method for automobile support

Abstract

The invention discloses a stamping and shaping method for an automobile support. The stamping and shaping method comprises the steps of pre-bending, 90-degree bending, parallelism adjustment and the like. In this way, according to the stamping and shaping method for the automobile support, certain bending deformation is applied by pre-bending the material strip, springback of the bent part of the material strip is reduced, the product size precision is guaranteed, meanwhile, stress states of the material strip in all the bent areas are adapted in advance through synchronous bending and parallelism adjustment on the two sides, and the stamping and shaping efficiency of the automobile support is improved. The size deviation caused by non-uniform deformation of materials is reduced, the stress is dispersed, secondary positioning or sequence turning is reduced, and the product parallelism precision is improved, so that the product yield and the working efficiency are improved, the service life of a mold can be prolonged, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of stamping equipment technology, and in particular to a stamping and shaping method for automobile brackets. Background Technology

[0002] In the production process of automotive brackets, traditional stamping equipment performs only one stamping operation during side bending. However, this method is prone to problems such as incomplete bending and asymmetrical shape after bending, which seriously affects the accuracy and effect of stamping and shaping, thereby reducing the product yield. In addition, after bending and shaping, the strip often gets stuck on the mold and cannot be easily unloaded, affecting work efficiency and production capacity. Therefore, improvements are needed. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A stamping and forming method for an automotive bracket is provided, the steps of which include: S1. First, pre-bend the strip so that the strip on both sides bends downward at 45°. By pre-bending the strip, a certain bending deformation is applied to reduce the springback of the bent part of the strip and ensure the dimensional accuracy of the product. S2. When the material belt moves to the next station, the material belt is bent twice, so that the material belt on both sides bends downward by 90°; S3. Perform a second 90° bend on the strip to ensure that the bending angle of the strip meets the design requirements; S4. Use the stamping die to simultaneously adjust the parallelism of the 90° bends on both sides of the strip.

[0004] In a preferred embodiment of the present invention, a stamping and shaping die is included, the stamping and shaping die comprising: The upper die module includes an upper die base, an upper backing plate, an upper clamping plate, a stripper plate, and an upper punch. The upper backing plate is fixedly connected to the bottom surface of the upper die base, and the upper clamping plate is disposed on the bottom surface of the upper backing plate. The stripper plate is movably connected to the upper die base via an elastic element. The two upper punches are disposed opposite to each other, and the top of the upper punch is fixedly connected to the upper clamping plate or the upper backing plate. The lower part of the upper punch is movably connected to the stripper plate to extend or retract from the stripper plate. The bottom of the upper punch is provided with a driving slope. The lower die module includes a lower die base, a lower die bending insert, an ejector pin, and forming components. The lower die bending insert is fixedly connected to the lower die base. A vertical ejector slot is vertically provided inside the lower die bending insert. The ejector pin is movably connected to the ejector slot, and the bottom of the ejector pin is connected to the lower die base via a first spring. This allows the ejector pin to move upwards and reposition itself under the action of the spring, extending beyond the top surface of the lower die bending insert. A set of forming components is provided on each side of the lower die base of the lower die bending insert. The two sets of forming components move synchronously relative to each other under the drive of the upper punch to cooperate with the lower die bending insert for bending. The shaping assembly includes a wedge block, a rectangular spring, a height-equalizing sleeve, a height-equalizing screw, a wedge correction block, and a wedge slider. The wedge block is fixedly connected to the lower die base, and the wedge slider is fixedly connected to the lower die base between the lower die bending insert and the wedge block. The wedge correction block is movably connected to the wedge slider to guide its movement. The outer end of the wedge correction block is connected to the wedge block via a rectangular spring to ensure proper movement under the influence of the rectangular spring. The wedge is reset by moving downwards towards the wedge block. The wedge correction block is connected to a height equalizing screw. The wedge block is provided with a height equalizing sleeve that is movably connected to the height equalizing screw. The upper punch is movably connected between the wedge block and the wedge correction block. The outer wall of the upper punch contacts the wedge block and the driving inclined surface abuts against the inclined surface on the wedge correction block, so as to drive the wedge correction block to move towards the lower die bending insert, so that the bending part on the wedge correction block cooperates with the lower die bending insert to bend and shape the strip.

[0005] In a preferred embodiment of the present invention, a stop plate is provided on the top surface of the stripping plate.

[0006] In a preferred embodiment of the present invention, the stop plate and the stripper plate are provided with through slots that allow the upper punch to pass through.

[0007] In a preferred embodiment of the present invention, one of the upper punches cooperates with a set of the shaping components to perform side shaping.

[0008] In a preferred embodiment of the present invention, the wedge slider has a U-shaped structure, and the wedge correction block is movably connected in the groove of the wedge slider.

[0009] In a preferred embodiment of the present invention, a bent portion is provided on the inner end of the wedge correction block.

[0010] The beneficial effects of this invention are as follows: by pre-bending the strip to apply a certain bending deformation, the springback of the bent part of the strip is reduced, ensuring the dimensional accuracy of the product. At the same time, by simultaneously bending on both sides and adjusting the parallelism, the stress state of the strip in each bending area is adapted in advance, reducing dimensional deviations caused by uneven material deformation and dispersing stress, reducing secondary positioning or transfer, improving the parallelism accuracy of the product, thereby improving the product yield and work efficiency, and also extending the mold life and reducing production costs. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic cross-sectional view of the stamping and forming die in the closed state in this invention. Figure 2 This is a cross-sectional view of the stamping forming die in the closed state from another angle in this invention. Figure 3 This is a schematic cross-sectional view of the stamping and shaping die in the open state of the present invention. Detailed Implementation

[0012] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] Please see Figure 1-3 The embodiments of the present invention include: A stamping and forming die for a stainless steel automotive connecting plate, the structure of which includes an upper die assembly and a lower die assembly.

[0014] The upper mold assembly includes an upper mold base 1, an upper backing plate 2, an upper clamping plate 3, a stop plate 4, a stripper 5, and an upper punch 6.

[0015] The upper pad is fixedly connected to the bottom surface of the upper mold base, the upper clamping plate is set on the bottom surface of the upper pad, the stripper plate is movably connected to the upper mold base through an elastic element, the top surface of the stripper plate is provided with a stop plate, the two upper punches are arranged opposite each other, and the top of the upper punches is fixedly connected to the upper clamping plate or the upper pad, the lower part of the upper punches is movably connected to the stripper plate to extend or retract the stripper plate, and the bottom of the upper punches is provided with a driving slope.

[0016] In a further preferred embodiment, the stop plate and the stripper plate are provided with through slots that allow the upper punch to pass through.

[0017] The lower mold assembly includes a lower mold base 7, a lower mold bending insert 8, an ejector pin 9, and a shaping component.

[0018] The lower die bending insert is fixedly connected to the lower die base. A vertical ejector slot is provided inside the lower die bending insert. The ejector pin is movably connected to the ejector slot, and the bottom of the ejector pin is connected to the lower die base through a spring. The ejector pin moves upward and resets under the action of the spring 10, so that the top of the ejector pin extends out of the top surface of the lower die bending insert, thereby completing the ejection. A set of shaping components is provided on each side of the lower die base of the lower die bending insert. The two sets of shaping components move synchronously relative to each other under the drive of the upper punch to cooperate with the lower die bending insert for bending.

[0019] A set of shaping components includes a wedge block 11, a rectangular spring 12, a height equalizing sleeve 13, a height equalizing screw 14, a wedge correction block 15, and a wedge slider 16.

[0020] The wedge block is fixedly connected to the lower die base, and the wedge slider is fixedly connected to the lower die base between the lower die bending insert and the wedge block. The wedge correction block is movably connected to the wedge slider to guide the movement of the wedge correction block. The outer end of the wedge correction block is connected to the wedge block through a rectangular spring to move and reset in the direction of the wedge block under the action of the rectangular spring. The wedge correction block is connected to an equal-height screw, and the wedge block is provided with an equal-height sleeve that is movably connected to the equal-height screw. This improves the accuracy of the movement of the wedge correction block, thereby ensuring the accuracy and efficiency of stamping.

[0021] The inner end of the wedge correction block is provided with a bending part. The upper punch is movably connected between the wedge support block and the wedge correction block. The outer wall of the upper punch is in contact with the wedge support block, and the driving inclined surface on the upper punch abuts against the inclined surface on the wedge correction block, so as to drive the wedge correction block to move in the direction of the lower die bending insert, so that the bending part on the wedge correction block cooperates with the lower die bending insert to bend and shape the strip.

[0022] A further preferred embodiment involves an upper punch working in conjunction with a set of shaping components for side shaping.

[0023] In a further preferred embodiment, the wedge slider has a U-shaped structure, and the wedge correction block is movably connected in the groove of the wedge slider.

[0024] During mold closing, the upper mold base drives the stripper plate and the upper punch to descend, pressing the strip 17 onto the lower mold base (lower mold bending insert). As the upper mold base continues to descend, the upper punch inserts between the wedge correction block and the wedge abutment block, causing the inner ends of the two sets of wedge correction blocks to move inward synchronously to approach the lower mold bending insert, thereby achieving parallel and 90° bending shaping of the strip. At this time, the spring on the ejector pin is in a compressed state.

[0025] When the mold opens, the upper punch moves upward under the drive of the upper mold base to disengage from the wedge correction block first. The wedge correction block moves outward under the action of the rectangular spring to move away from the lower mold bending insert. The stripper plate releases the strip under the drive of the upper mold base, and the ejector pin moves upward under the action of the spring force and extends out of the lower mold bending insert to push the strip upward and disengage from the lower mold bending insert, thereby completing the strip removal.

[0026] The stamping die of this application has the following advantages: (1) Reduce mold stress concentration, reduce mold wear, greatly reduce maintenance costs, reduce mold adjustment difficulty, greatly shorten mold debugging time, and improve work efficiency and production capacity.

[0027] (2) High molding precision. By applying force on both sides simultaneously, symmetrical molding is achieved, avoiding displacement and uneven springback caused by force on one side, resulting in better dimensional stability.

[0028] (3) Lateral force balance: the double-sided inclined wedge sliders are symmetrically arranged, the lateral forces cancel each other out, reduce mold wear and punch press eccentric load, and extend mold life.

[0029] (4) Improve production efficiency. Simultaneously adjust the 90° bending and shaping on both sides during one stamping, reduce secondary positioning or transfer, and improve the accuracy of product parallelism.

[0030] A stamping and forming method for an automobile bracket, comprising the following steps: S1. First, pre-bend the strip so that the strips on both sides are bent downwards at 45°; S2. When the material belt moves to the next station, the material belt is bent twice, so that the material belt on both sides bends downward by 90°; S3. Perform a second 90° bend on the strip to ensure that the bending angle of the strip meets the design requirements; S4. Use a stamping die to adjust the parallelism of the 90° bends on both sides of the strip.

[0031] The above-mentioned stamping and forming method has the following advantages: (1) By pre-bending the strip, a certain bending deformation is applied to reduce the springback of the bent part of the strip and ensure the dimensional accuracy of the product; (2) By step-by-step bending and parallelism adjustment, the stress state of the strip in each bending area can be adapted in advance, reducing the dimensional deviation caused by uneven material deformation, and can also disperse stress, avoiding surface scratches, wrinkles and other defects in the strip during a large deformation bending process.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A stamping and forming method for an automobile bracket, characterized in that the steps include... include: S1. First, pre-bend the strip so that the strip on both sides bends downward at 45°. By pre-bending the strip, a certain bending deformation is applied to reduce the springback of the bent part of the strip and ensure the dimensional accuracy of the product. S2. When the material belt moves to the next station, the material belt is bent twice, so that the material belt on both sides bends downward by 90°; S3. Perform a second 90° bend on the strip to ensure that the bending angle of the strip meets the design requirements; S4. Use the stamping die to simultaneously adjust the parallelism of the 90° bends on both sides of the strip.

2. The stamping and forming method for an automobile bracket according to claim 1, characterized in that, Including stamping and forming dies, which include: The upper die module includes an upper die base, an upper backing plate, an upper clamping plate, a stripper plate, and an upper punch. The upper backing plate is fixedly connected to the bottom surface of the upper die base, and the upper clamping plate is disposed on the bottom surface of the upper backing plate. The stripper plate is movably connected to the upper die base via an elastic element. The two upper punches are disposed opposite to each other, and the top of the upper punch is fixedly connected to the upper clamping plate or the upper backing plate. The lower part of the upper punch is movably connected to the stripper plate to extend or retract from the stripper plate. The bottom of the upper punch is provided with a driving slope. The lower die module includes a lower die base, a lower die bending insert, an ejector pin, and forming components. The lower die bending insert is fixedly connected to the lower die base. A vertical ejector slot is vertically provided inside the lower die bending insert. The ejector pin is movably connected to the ejector slot, and the bottom of the ejector pin is connected to the lower die base via a first spring. This allows the ejector pin to move upwards and reposition itself under the action of the spring, extending beyond the top surface of the lower die bending insert. A set of forming components is provided on each side of the lower die base of the lower die bending insert. The two sets of forming components move synchronously relative to each other under the drive of the upper punch to cooperate with the lower die bending insert for bending. The shaping assembly includes a wedge block, a rectangular spring, a height-equalizing sleeve, a height-equalizing screw, a wedge correction block, and a wedge slider. The wedge block is fixedly connected to the lower die base, and the wedge slider is fixedly connected to the lower die base between the lower die bending insert and the wedge block. The wedge correction block is movably connected to the wedge slider to guide its movement. The outer end of the wedge correction block is connected to the wedge block via a rectangular spring to ensure proper movement under the influence of the rectangular spring. The wedge is reset by moving downwards towards the wedge block. The wedge correction block is connected to a height equalizing screw. The wedge block is provided with a height equalizing sleeve that is movably connected to the height equalizing screw. The upper punch is movably connected between the wedge block and the wedge correction block. The outer wall of the upper punch contacts the wedge block and the driving inclined surface abuts against the inclined surface on the wedge correction block, so as to drive the wedge correction block to move towards the lower die bending insert, so that the bending part on the wedge correction block cooperates with the lower die bending insert to bend and shape the strip.

3. The stamping and forming method for an automobile bracket according to claim 2, characterized in that, A stop plate is provided on the top surface of the stripping plate.

4. The stamping and forming method for an automobile bracket according to claim 2, characterized in that, The stop plate and the stripper plate are provided with through slots that allow the upper punch to pass through.

5. The stamping and forming method for an automobile bracket according to claim 2, characterized in that, One of the upper punches works in conjunction with a set of the shaping components to perform side shaping.

6. The stamping and forming method for an automobile bracket according to claim 2, characterized in that, The wedge slider has a concave structure, and the wedge correction block is movably connected in the groove of the wedge slider.

7. The stamping and forming method for an automobile bracket according to claim 2, characterized in that, The inner end of the wedge correction block is provided with a bending part.

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