Stretching belt flange product flange thickness adjustable stamping mechanism

Abstract

The utility model discloses a kind of flange thickness adjustable punch press mechanisms of stretch belt flange product flange, including upper die holder and lower die holder, four punch stations are sequentially arranged between the upper die holder and lower die holder: half stretch station, stretch and oblique stretch station, back to the mound station, hit flat station.The beneficial effects of the present utility model are: through oblique pull and back to the mound process, the flange can be increased to the thickness required, thereby meeting the needs of production.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and in particular to a stamping mechanism for adjustable flange thickness of a tension strip flange product. Background Technology

[0002] In the stamping field, when there are holes in the drawn parts, it is generally preferred to stamp from the outside to the inside to ensure that there is enough space to design the punch and blanking and stripping mechanism. In this way, the burrs generated by stamping will be on the inner wall of the product. Once the customer requires the inner wall to be smooth and burr-free, it is not possible to design it according to the stamping method from the outside to the inside. Utility Model Content

[0003] The purpose of this utility model is to provide a stamping mechanism for adjustable flange thickness of stretch strip flange products that solves or partially solves the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An adjustable-thickness stamping mechanism for stretching flange products is disclosed, used for stamping cup-shaped flanged finished products, wherein the flange thickness is greater than the inner wall thickness; it includes an upper die base and a lower die base, a stripper plate is movably disposed on the upper die base, and four stamping stations are sequentially arranged between the upper die base and the lower die base:

[0006] The semi-drawing station is used to stamp round sheet material into a cup-shaped first semi-finished product with a flange on the cup mouth. The height of the first semi-finished product is 60-80% of the height of the finished product.

[0007] The stretching and oblique stretching station is used to stamp the height of the first semi-finished product to the finished product height, and to stretch its flange upwards obliquely into an S-shaped inclined structure to obtain the second semi-finished product.

[0008] At the back-brick station, the flange of the second semi-finished product is pressed inward and downward to obtain a third semi-finished product with a flange thickness that exceeds the thickness of the finished product by 5-20% and the flange is raised upward.

[0009] At the flattening station, the flange of the third semi-finished product is pressed downwards and flattened into the finished product shape to obtain the finished product;

[0010] The return die station includes a third die cavity set on the lower die base and a third punch set on the upper die base. The third punch includes a front part for extending into the interior of the third semi-finished product and a stepped part located behind the front part for stamping the flange. An annular die cavity inner support is provided in the third die cavity corresponding to the position of the stepped part. An annular limiting block is provided on the unloading plate. The limiting block is sleeved on the third punch. An annular limiting groove for receiving the flange is provided on the lower end face of the limiting block.

[0011] Preferably, the third punch has an exhaust channel along its axial direction, and the corner of the stepped portion has a plurality of air holes that connect to the exhaust channel.

[0012] Preferably, the stretching and oblique stretching station includes a second die, an outer die is fitted over the second die, the second die has a cup-shaped die hole for receiving the workpiece, and the outer die has a flange-shaped die hole for receiving the flange.

[0013] Preferably, the upper die base is provided with a pad, and the pad is provided with a fixing plate. The fixing plate is provided with a first punch, a second punch, and a fourth punch corresponding to the semi-stretching station, the stretching and oblique stretching station, and the flattening station. The lower die base is provided with a first die cavity and a fourth die cavity corresponding to the semi-stretching station and the flattening station.

[0014] Preferably, a lower pad is provided below the lower mold base, and a support foot is provided between the lower pad and the lower mold base to support the lower mold base.

[0015] Preferably, both the first and fourth dies are provided with inner supports in their cavities, and nitrogen springs are provided at the semi-stretching station and the flattening station. The nitrogen springs are located between the lower pad and the lower die base and abut against the inner supports of the first and fourth dies via push rods.

[0016] The beneficial effects of this invention are: by using the diagonal tensioning and back-bending process, the flange can be increased to the required thickness, thereby meeting production needs. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural schematic diagram of the present invention;

[0018] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0019] Figure 3 This is a product process illustration diagram of this utility model. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0021] In the description of this utility model, it should be noted that the terms "inner", "outer", "upper", "lower", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figure 3 As shown, this utility model discloses a stamping mechanism for a stretch flange product with adjustable flange thickness, which adopts a four-step process: semi-stretching, stretching and oblique stretching, back-bending and flattening, to stamp a cup-shaped finished product with flange, wherein the thickness of the flange is greater than the thickness of the inner wall. Figure 3 The image shows the changes in the workpiece during the four-step process.

[0023] like Figures 1 to 2 As shown, the present invention provides a stamping mechanism for adjustable flange thickness of a stretch strip flange product, which includes an upper die base 10 and a lower die base 12. A stripper plate 14 is movably disposed on the upper die base 10, a pad plate 16 is disposed on the upper die base 10, a fixing plate 18 is disposed on the pad plate 16, a lower pad plate 17 is disposed below the lower die base 12, and a support foot 20 for supporting the lower die base 12 is disposed between the lower pad plate 17 and the lower die base 12.

[0024] Four stamping stations are arranged sequentially between the upper die holder 10 and the lower die holder 12:

[0025] The semi-drawing station is used to stamp round sheet material into a cup shape with a flange on the outside of the cup mouth. The height of the first semi-finished product is 60 to 80% of the height of the finished product. It stamps the product in steps, reducing the amount of stretching at one time and reducing the occurrence of breakage.

[0026] The stretching and oblique stretching station is used to stamp the height of the first semi-finished product to the finished product height, and to stretch its flange upwards into an S-shaped inclined structure to obtain the second semi-finished product; it is used to increase the thickness of the flange to store materials.

[0027] At the back-brick station, the flange of the second semi-finished product is pressed inward and downward to obtain a third semi-finished product with a flange thickness that exceeds the thickness of the finished flange by 5-20% and the flange is raised upward; it is used to squeeze and force the metal material at the front 34 of the flange to flow to the middle and rear of the flange, thereby increasing the thickness of the flange.

[0028] At the flattening station, the flange of the third semi-finished product is pressed downwards and flattened into the finished product shape to obtain the finished product; this is the shaping process, which can complete the final plasticity of the flange and further improve the shape and smoothness of other parts of the finished product.

[0029] Specifically:

[0030] The stretching and oblique stretching station includes a second die 22, an outer die 24 is fitted over the second die 22, the second die 22 is provided with a cup body die hole 26 for receiving the workpiece, and the outer die 24 is provided with a flange die hole 28 for receiving the flange.

[0031] The return die station includes a third die 30 mounted on the lower die base 12 and a third punch 32 mounted on the upper die base 10. The third punch 32 includes a front part 34 for extending into the interior of the third semi-finished product and a stepped part 36 located behind the front part 34 for stamping the flange. A ring-shaped die inner support 38 is provided inside the third die 30 corresponding to the stepped part 36. A ring-shaped limiting block 40 is provided on the stripper plate 14. The limiting block 40 is sleeved on the third punch 32. A ring-shaped limiting groove 42 for receiving the flange is provided on the lower end face of the limiting block 40. The limiting groove 42 cooperates with the third die 30 to limit the shape of the workpiece, so that the metal flows to the designated position.

[0032] The fixed plate 18 is provided with a first punch 44, a second punch 46 and a fourth punch 48 corresponding to the semi-stretching station, the stretching and oblique stretching station and the flattening station; the lower die base 12 is provided with a first die 50 and a fourth die 52 corresponding to the semi-stretching station and the flattening station.

[0033] An exhaust channel 54 is provided along the axial direction of the third punch 32, and several air holes 56 connected to the exhaust channel 54 are provided at the corner of the step 36 to discharge air from the workpiece and avoid affecting the shape of the final product.

[0034] Both the first die cavity 50 and the fourth die cavity 52 are equipped with die inner supports 38. Nitrogen springs 60 are installed at the semi-drawing station and the flattening station. The nitrogen springs 60 are located between the lower pad plate 16 and the lower die base 12, and abut against the die inner supports 38 of the first die cavity 50 and the fourth die cavity 52 via push rods. The nitrogen springs 60 are used to push the die inner supports 38 upwards, and indirectly push the workpiece, so that it is disengaged from the die cavity.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A stamping mechanism for adjustable flange thickness of a stretched flange product, used for stamping cup-shaped flanged finished products, wherein the flange thickness is greater than the inner wall thickness; comprising an upper die base and a lower die base, wherein a stripper plate is movably disposed on the upper die base, characterized in that, Four stamping stations are arranged sequentially between the upper die base and the lower die base: The semi-drawing station is used to stamp round sheet material into a cup shape with a flange on the outside of the cup mouth. The height of the first semi-finished product is 60 to 80% of the height of the finished product. The stretching and oblique stretching station is used to stamp the height of the first semi-finished product to the finished product height, and to stretch its flange upwards obliquely into an S-shaped inclined structure to obtain the second semi-finished product. At the return-to-base station, the flange of the second semi-finished product is pressed inward and downward to obtain a third semi-finished product with a flange thickness that exceeds the thickness of the finished product by 5 to 20% and the flange is raised upward. At the flattening station, the flange of the third semi-finished product is pressed downwards and flattened into the finished product shape to obtain the finished product; The return die station includes a third die cavity set on the lower die base and a third punch set on the upper die base. The third punch includes a front part for extending into the interior of the third semi-finished product and a stepped part located behind the front part for stamping the flange. An annular die cavity inner support is provided in the third die cavity corresponding to the position of the stepped part. An annular limiting block is provided on the unloading plate. The limiting block is sleeved on the third punch. An annular limiting groove for receiving the flange is provided on the lower end face of the limiting block.

2. The adjustable flange thickness stamping mechanism for a tension strip flange product according to claim 1, characterized in that, The third punch has an exhaust channel along its axial direction, and the corner of the stepped portion has several air holes that connect to the exhaust channel.

3. The adjustable flange thickness stamping mechanism for a tension strip flange product according to claim 1, characterized in that, The stretching and oblique stretching station includes a second die, an outer die is fitted over the second die, the second die has a cup-shaped die hole for receiving the workpiece, and the outer die has a flange-shaped die hole for receiving the flange.

4. The adjustable flange thickness stamping mechanism for a tension strip flange product according to claim 1, characterized in that, The upper die base is provided with a pad, and the pad is provided with a fixing plate. The fixing plate is provided with a first punch, a second punch, and a fourth punch corresponding to the semi-stretching station, the stretching and oblique stretching station, and the flattening station. The lower die base is provided with a first die cavity and a fourth die cavity corresponding to the semi-stretching station and the flattening station.

5. The adjustable flange thickness stamping mechanism for a tension strip flange product according to claim 4, characterized in that, A lower pad is provided below the lower mold base, and a support foot is provided between the lower pad and the lower mold base to support the lower mold base.

6. The adjustable flange thickness stamping mechanism for a tension strip flange product according to claim 5, characterized in that, Both the first and fourth cavities are provided with inner supports. Nitrogen springs are provided at the semi-stretching station and the flattening station. The nitrogen springs are located between the lower pad and the lower mold base and abut against the inner supports of the first and fourth cavities via push rods.

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