Product press working method and die

Abstract

The present application relates to the field of stamping, in particular to a product stamping processing method and die. The method comprises the following steps: punching a positioning hole for positioning position and angle at the middle position of the product area of the material belt; stamping the product area after the material belt drives the product area with the positioning hole to move to the product area stamping station each time; the product area is separated from the material belt after the product area is stamped at the last product area stamping station, and a middle product is obtained; stamping the middle product after the material belt pushes the middle product to move to the product stamping processing station each time; the steps of each stamping processing are as follows: in the process of the upper die descending, first, the positioning punch is matched with the positioning hole to correct the position and angle of the middle product; then, the middle product is stamped. The present application can realize the position and angle requirements of the middle product in the stamping process without the process thin belt, reduce the material cost, and reduce the die station.

Description

Technical Field

[0001] This invention relates to the field of stamping, and more specifically to a product stamping process method and mold. Background Technology

[0002] In the field of precision stamping manufacturing, progressive die processing typically employs continuous strip feeding to achieve multi-stage product forming. In traditional processes, to ensure the positioning accuracy and stability of the sheet g during transport, at least one process strip f is commonly formed outside the product area a by increasing the width of the strip 1 or widening the spacing between adjacent products. This process strip f connects the sheet g to the strip 1, as detailed below. Figure 1 As shown.

[0003] Although this process can meet the relative position requirements between the sheet g and the strip 1 during the transfer process, it has the following inherent drawbacks:

[0004] Firstly, the introduction of the process tape f directly leads to an increase in the width of the material tape 1, or to a larger product spacing in the feeding direction, resulting in low material utilization and increased costs.

[0005] Secondly, in order to meet the processing of the fine strip f and the final cutting, the mold must be equipped with additional stations, which not only increases the complexity and manufacturing cost of the mold, but also reduces the effective molding process that can be integrated into a single mold due to the limited number of stations.

[0006] Third, thick products require greater stamping pressure during the stamping process, and the thin process strip may not be able to meet the positional requirements of thick products during the stamping process. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a product stamping processing method that can realize the position and angle requirements of intermediate products during the stamping process without the need for process strips, thereby reducing material costs and reducing the number of mold stations.

[0008] To solve the above-mentioned technical problems, the technical solution of the present invention is: a product stamping process method, comprising:

[0009] A positioning hole is punched in the middle of the product area of ​​the material strip for positioning the position and angle;

[0010] After the material strip moves the product area with the positioning hole to the product area stamping station each time, the product area is stamped; wherein,

[0011] After the product area is stamped at the last stamping station, the product area is separated from the strip and an intermediate product of the desired shape is obtained.

[0012] After the material strip pushes the intermediate product to the product stamping station each time, the intermediate product is stamped; wherein, the steps of each stamping process are as follows:

[0013] During the downward movement of the upper die, the intermediate product is first corrected in position and angle by the positioning punch cooperating with the positioning hole, and the shape of the positioning punch matches the shape of the positioning hole; then the intermediate product is stamped.

[0014] Furthermore, the positioning hole is teardrop-shaped, and the positioning punch is a frustum-shaped structure with its small end face facing down and its cross-section shaped like a teardrop.

[0015] Furthermore, the product area has at least two stamping stations, two of which are a half-shearing station and a stamping forming station;

[0016] The stamping process performed on the product area includes at least the following:

[0017] First, the edge of the product area is partially cut at the half-cutting station; then, the product area is stamped at the stamping station to completely separate the product area from the strip and form it into an intermediate product of the desired shape.

[0018] Furthermore, the product stamping processing station is provided with at least two stations, two of which are a partial stamping station and a punching station;

[0019] The stamping process performed on the intermediate product includes at least the following:

[0020] First, the intermediate product is partially stamped at the partial stamping station; then, the intermediate area including the positioning hole is punched away at the punching station to form a center hole.

[0021] Furthermore, the partial stamping operation is an internal locking point operation, configured to be performed radially along the intermediate product.

[0022] Furthermore, the internal locking point operation is performed based on an internal locking point assembly, which includes a plurality of internal locking point structures evenly arranged along the circumference of the intermediate product. Each internal locking point structure includes a insert, a slide bar, and a reset elastic element. The insert and the slide bar are both mounted on the upper die, and the reset elastic element is disposed between the upper die and the slide bar.

[0023] The lower end of the insert is tapered or inclined, and is used to push the slide bar radially along the intermediate product during the downward movement of the upper die to punch out an inner locking point in the edge area of ​​the intermediate product; the reset elastic element is used to reset the slide bar by its rebound during the upward movement of the insert with the upper die.

[0024] Furthermore, the intermediate product is stamped to obtain the final product, which is a thrust pad.

[0025] This invention also relates to a product stamping die, comprising a punching assembly, at least one product area stamping assembly, and at least one product stamping processing assembly arranged sequentially along the progressive direction of the strip; wherein,

[0026] The punching assembly is used to punch positioning holes in the middle of the product area of ​​the strip for positioning the position and angle.

[0027] The product area stamping assembly is used to stamp the product area; wherein, after the last product area stamping assembly stamps the product area, the product area is separated from the strip and an intermediate product of the desired shape is obtained.

[0028] The product stamping assembly is used to stamp the intermediate product; wherein each stamping process is as follows: during the downward movement of the upper die, the intermediate product is first corrected in position and angle by means of a positioning punch cooperating with the positioning hole, the shape of the positioning punch matching the shape of the positioning hole; and then the intermediate product is stamped.

[0029] By adopting the above solution, the present invention has the following beneficial effects:

[0030] This invention utilizes a positioning punch and positioning hole to center and correct the angle of intermediate products at the stamping station before stamping. This ensures that the intermediate products meet the relative position and angle requirements for stamping, eliminating the need to widen the material strip to produce the required width for the process strip, or to adjust the spacing between adjacent intermediate products to the required size for the process strip. Compared to traditional processes that rely on process strips to achieve relative positional requirements, this invention significantly reduces material usage and costs. Furthermore, the simpler mold structure and fewer mold stations further reduce mold costs, enhancing the product's price competitiveness. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of traditional stamping material layout.

[0032] Figure 2 This is a schematic diagram of the stamping and unloading process of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the intermediate product of the present invention after stamping at the last product stamping station;

[0034] Figure 4 This is a schematic diagram of the positioning punch of the present invention;

[0035] Figure 5 This is a schematic diagram of the internal locking point assembly of the present invention;

[0036] Figure 6 This is a schematic diagram of the product stamping die of the present invention;

[0037] Figure 7 This is a diagram showing the correspondence between the stamping die and the stamping layout of the product according to the present invention;

[0038] Figure 8 This is a schematic diagram of the upper die of the stamping die of the present invention;

[0039] Figure 9 This is a schematic diagram of the lower die of the stamping die of the present invention;

[0040] In the diagram, 1. Strip material; 2. Positioning hole; 3. Upper die; 4. Positioning punch; 41. Frustum; 42. Triangular frustum; 5. Lower die; 6. Punching assembly; 7. Product area stamping assembly; 7a. Half-shear assembly; 7b. Stamping forming assembly; 8. Product stamping processing assembly; 8a. Internal locking point assembly; 81a. Insert cutter; 82a. Slide rod; 8b. External locking point assembly; 8c. Precision cutting assembly; 9. Blanking hole; 10. Center hole;

[0041] a. Product area; b. Intermediate products; c. Final products; d. Inner locking point; e. Outer locking point; f. Process strip; g. Material sheet. Detailed Implementation

[0042] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0043] like Figures 2 to 9 As shown, a product stamping process includes:

[0044] A positioning hole 2 is punched in the middle of the product area a of the material strip 1 for positioning the position and angle;

[0045] Each time the material strip 1 moves the product area a with the positioning hole 2 to the product area stamping station, the product area a is stamped; wherein,

[0046] After stamping product area a at the last stamping station, product area a is separated from material strip 1, and intermediate product b of the expected shape is obtained.

[0047] After each push of intermediate product b by conveyor belt 1 to the product stamping station, intermediate product b is stamped; the steps of each stamping process are as follows:

[0048] During the downward movement of the upper die 3, the position and angle of the intermediate product b are first corrected by the positioning punch 4 cooperating with the positioning hole 2, and the shape of the positioning punch 4 matches the shape of the positioning hole 2; then the intermediate product b is stamped.

[0049] In this embodiment, product area a is stamped, which can be done by half-shearing, stamping, precision cutting, etc.; intermediate product b is stamped, which can be done by grooving, pressing and locking points, etc.; after the intermediate product b is stamped at the last product stamping station, the final product c is obtained.

[0050] Specifically, after the intermediate product b detaches from the strip 1, it inevitably undergoes a certain degree of rotation and center offset during the pushing process by the strip 1. In this embodiment, the positioning punch 4, in cooperation with the positioning hole 2, performs center alignment and angle correction on the intermediate product b at the product stamping station before it is stamped. This ensures that the intermediate product b meets the relative position and angle requirements for stamping, eliminating the need to widen the strip 1 to produce the process strip f, and also eliminating the need to set the spacing between adjacent intermediate products b to the size required to produce the process strip f. Compared to the traditional process that achieves relative position requirements through the process strip f, this embodiment significantly reduces material usage and material costs. Simultaneously, the mold structure is simpler, with fewer mold stations, effectively reducing mold costs and enhancing the product's price advantage.

[0051] like Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the positioning hole 2 is teardrop-shaped, and the positioning punch 4 is a frustum-shaped structure with its small end face facing downwards and its cross-section shaped like a teardrop. For example, the teardrop shape can be a circle and two isosceles triangles with two sides tangent to the circle, and the apex of the isosceles triangle can be rounded. The frustum-shaped structure with the small end face facing downwards is a structure whose cross-section gradually increases from bottom to top. For example, the frustum-shaped structure of the positioning punch 4 can include a frustum-shaped portion 41 and a truncated triangular portion 42, with two sides of the truncated triangular portion 42 tangent to the outer peripheral surface of the frustum-shaped portion 41, and the other side intersecting with the frustum-shaped portion 41.

[0052] It should be noted that the shape of the positioning hole 2 is not limited to this. As long as it can be used for position and angle positioning, it can also be triangular, square, etc. The positioning punch 4 is still a truncated cone structure with the small end face facing down, and the cross-section is a shape that matches the shape of the positioning hole 2.

[0053] The method in this embodiment is applicable to products that have relative requirements for position and angle during the stamping process, including but not limited to thrust gaskets, tension cylinder liners, etc.

[0054] The methods described in the above embodiments will be explained in detail below, taking into account the stamping process of the thrust pad.

[0055] The thrust pad is stamped using a progressive die, which includes an upper die 3 and a lower die 5 that cooperate with each other, with multiple stamping components arranged between them.

[0056] like Figures 2 to 9 As shown, the specific process of stamping a thrust pad during the first stage of the material strip feeding is as follows:

[0057] The first step is to punch a positioning hole 2 in the middle of the product area a of the material strip 1, which is directly opposite the punching station, using the punching assembly 6 to locate the position and angle.

[0058] In the second step, the strip 1 moves the product area a with positioning holes 2 to the first product area stamping station (i.e., the half-shear station). The first product area stamping component 7 (i.e., the half-shear component 7a) performs a half-shear operation on the edge of the product area a, so that the edge of the product area a is partially separated from the strip 1 in the thickness direction.

[0059] The third step involves the strip 1 moving the product area a with the positioning hole 2 to the second product area stamping station (i.e., the stamping forming station). The second product area stamping assembly 7 (i.e., the stamping forming assembly 7b) then stamps and forms the product area a, completely separating it from the strip 1 and shaping it into an intermediate product b with upturned edges.

[0060] In the fourth step, the material belt 1 pushes the intermediate product b to the first product stamping processing station (i.e., the internal locking point station), and the first product stamping processing component 8 (i.e., the internal locking point component 8a) performs an internal locking operation on the upper edge of the flipped part of the intermediate product b to form the internal locking point d.

[0061] Fifth step, the material belt 1 pushes the intermediate product b to the second product stamping processing station (i.e., the external locking point station), and the second product stamping processing component 8 (i.e., the external locking point component 8b) performs the external locking point operation on the flipped part of the intermediate product b to form the external locking point e;

[0062] Step 6: The material strip 1 pushes the intermediate product b to the third product stamping processing station (i.e., the precision cutting station). The intermediate area of ​​the intermediate product b, including the positioning hole 2, is punched away by the third product stamping processing component 8 (i.e., the precision cutting component 8c) to form the center hole 10, thus obtaining the final product c.

[0063] Step 7: The conveyor belt 1 pushes the final product c to the unloading station and unloads it through the unloading hole 9.

[0064] In the fourth, fifth and sixth steps, during the downward movement of the upper die 3, the position and angle of the intermediate product b are first corrected by the positioning punch 4 cooperating with the positioning hole 2, and then the intermediate product b is stamped.

[0065] In this embodiment, preferably, the internal locking point operation is performed based on the internal locking point assembly 8a. The internal locking point assembly 8a includes a plurality of internal locking point structures evenly arranged along the circumference of the intermediate product b. Each internal locking point structure includes a insert 81a, a slide bar 82a, and a reset elastic element. The insert 81a and the slide bar 82a are both mounted on the upper mold 3, and the reset elastic element is disposed between the upper mold 3 and the slide bar 82a.

[0066] The lower end of the insert 81a is tapered or inclined, and is used to push the slide bar 82a radially along the intermediate product b during the downward movement of the upper mold 3 to punch out an inner locking point in the edge area of ​​the intermediate product b; the reset elastic element is used to reset the slide bar 82a by its rebound during the upward movement of the insert 81a along the upper mold 3.

[0067] This type of internal locking point assembly 8a allows for the radial stamping of an internal locking point d along the edge of the intermediate product b. Traditional stamping methods involve axial force. When pressing the internal locking point d using an axially stressed die structure, the material at the locking point deforms in two directions due to the axial force. The inner diameter movement forms the internal locking point d, while the outer diameter movement affects the product's outer diameter, causing quality issues. In this embodiment, the radially stressed die structure (i.e., the internal locking point assembly 8a) only exerts radial force on the material at the locking point d through the sliding rod 82a, moving it from the outer radial direction to the inner diameter. The material moves inward through the sliding rod 82a, forming the internal locking point d. The outer diameter conforms to the drawing requirements, thus ensuring product accuracy and resulting in higher quality products.

[0068] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A product stamping process, characterized in that, include: A positioning hole (2) is punched in the middle of the product area (a) of the strip (1) for positioning the position and angle. After the material strip (1) moves the product area (a) with the positioning hole (2) to the product area stamping station each time, the product area (a) is stamped; wherein, after the product area (a) is stamped at the last product area stamping station, the product area (a) is completely separated from the material strip (1) to obtain an intermediate product (b) of the expected shape. After the material strip (1) pushes the intermediate product (b) to the product stamping station each time, the intermediate product (b) is stamped; wherein, the steps of each stamping process are as follows: during the downward movement of the upper die (3), the intermediate product (b) is first corrected in position and angle by the positioning punch (4) cooperating with the positioning hole (2) so that the intermediate product (b) meets the relative position and angle requirements required for stamping, and the shape of the positioning punch (4) matches the shape of the positioning hole (2); then the intermediate product (b) is stamped. The positioning hole (2) is teardrop-shaped, and the positioning punch (4) is a frustum structure with the small end face facing down and the cross-section in the shape of a teardrop. The teardrop shape includes a circle and two isosceles triangles with their waists tangent to the circle. The apex of the isosceles triangle is rounded. The frustum structure of the positioning punch (4) includes a frustum (41) and a truncated triangular frustum (42). Two sides of the truncated triangular frustum (42) are tangent to the outer periphery of the frustum (41), and the other side intersects with the frustum (41).

2. The product stamping method according to claim 1, characterized in that, The product area has at least two stamping stations, two of which are a half-shearing station and a stamping forming station; The stamping process performed on the product area (a) includes at least the following: First, the edge of the product area (a) is partially cut at the half-cutting station; then, the product area (a) is stamped at the stamping station to completely separate the product area (a) from the strip (1) and form it into an intermediate product (b) of the expected shape.

3. The product stamping method according to claim 1, characterized in that, The product stamping processing station is provided with at least two, two of which are a partial stamping station and a punching station; The stamping process performed on the intermediate product (b) includes at least the following: First, the intermediate product (b) is partially stamped at the local stamping station; then, the intermediate area of ​​the intermediate product (b), including the positioning hole (2), is punched away at the punching station to form a center hole (10).

4. The product stamping method according to claim 3, characterized in that, The partial stamping operation is an internal locking point operation, configured to be performed radially along the intermediate product (b).

5. The product stamping method according to claim 4, characterized in that, The internal locking point operation is performed based on the internal locking point assembly (8a), which includes a plurality of internal locking point structures evenly arranged along the circumference of the intermediate product (b). Each internal locking point structure includes a insert (81a), a slide rod (82a), and a reset elastic element. The insert (81a) and the slide rod (82a) are both mounted on the upper mold (3), and the reset elastic element is disposed between the upper mold (3) and the slide rod (82a). The lower end of the insert (81a) is tapered or inclined, and is used to push the slide bar (82a) radially along the intermediate product (b) during the downward movement of the upper mold (3) to punch out an inner locking point (d) in the edge region of the intermediate product (b); the reset elastic element is used to reset the slide bar (82a) by its rebound during the upward movement of the insert (81a) along the upper mold (3).

6. The product stamping method according to any one of claims 1-5, characterized in that, The intermediate product (b) is stamped to obtain the final product (c), which is a thrust pad.

7. A product stamping die, characterized in that, It includes a punching assembly (6) arranged sequentially along the progressive direction of the strip (1), at least one product area stamping assembly (7), and at least one product stamping processing assembly (8); wherein, The punching assembly (6) is used to punch a positioning hole (2) in the middle of the product area (a) of the strip (1) for positioning the position and angle. The product area stamping assembly (7) is used to stamp the product area (a); wherein, after the last product area stamping assembly (7) stamps the product area (a), the product area (a) is completely separated from the strip (1) to obtain an intermediate product (b) of the expected shape. The product stamping assembly (8) is used to stamp the intermediate product (b); wherein, each stamping process is as follows: during the downward movement of the upper die (3), the intermediate product (b) is first corrected in position and angle by the positioning punch (4) cooperating with the positioning hole (2), and the shape of the positioning punch (4) matches the shape of the positioning hole (2); then the intermediate product (b) is stamped; wherein, The positioning hole (2) is teardrop-shaped, and the positioning punch (4) is a frustum structure with the small end face facing down and the cross-section in the shape of a teardrop. The teardrop shape includes a circle and two isosceles triangles with their waists tangent to the circle. The apex of the isosceles triangle is rounded. The frustum structure of the positioning punch (4) includes a frustum (41) and a truncated triangular frustum (42). Two sides of the truncated triangular frustum (42) are tangent to the outer periphery of the frustum (41), and the other side intersects with the frustum (41).

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