Bending stamping forming module and method thereof

Abstract

The invention discloses a bending stamping forming module group and a method thereof. The bending stamping forming module group comprises a bending die and a first shaping die. The bending die is provided with a bending convex inflection point, and the first shaping die is provided with a shaping convex inflection point, which can form a bending inner angle of an obtuse structure during the bending and shaping of a workpiece. The bending stamping forming module group method forms an obtuse bending inner angle of the workpiece during the bending and shaping, thereby reducing the rebound in the bending and shaping process, improving the dimensional stability, and improving the quality qualification rate.

Description

Technical Field

[0001] The invention relates to the field of stamping technology, and in particular to a bending stamping forming module and a method thereof. Background Art

[0002] The bending angle of the existing bending and shaping mold is an arc structure. The corresponding arc bending angle is formed in the workpiece bending and shaping process. The arc bending angle is easy to form, but there is a problem of large springback, which leads to dimensional instability and greatly affects product quality. Summary of the invention

[0003] The object of the present invention is to provide a bending and stamping forming module group, the bending surface of the bending die is provided with an obtuse-angled bending convex inflection point, and the shaping surface of the first shaping die is provided with an obtuse-angled bending convex inflection point, so that the workpiece has an obtuse-angled bending inner angle during bending and shaping, which is beneficial to reduce bending springback, thereby improving dimensional stability, improving quality qualification rate, optimizing the bending and shaping forming process, and solving the problem that the inner angle of the bending angle during bending and forming in the existing bending and forming process is an arc structure, which easily causes workpiece springback and affects dimensional stability.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] The bending stamping forming die set comprises a bending die and a first shaping die, wherein the bending die comprises an upper bending die and a lower bending die;

[0006] The connection of the bending surface of the upper bending die is provided with an obtuse upper bending convex inflection point;

[0007] The connection of the bending surface of the lower bending die is provided with an obtuse lower bending convex inflection point;

[0008] The first shaping mold includes a first shaping upper mold and a first shaping lower mold;

[0009] The connection between the shaping surfaces of the first shaping upper mold is provided with an obtuse upper shaping convex inflection point;

[0010] An obtuse lower shaping convex inflection point is provided at the connection of the shaping surfaces of the first shaping lower die.

[0011] Therefore, when the workpiece is in the bending mold, because the bending upper mold and the bending lower mold are both provided with obtuse upper bending convex inflection points and lower bending convex inflection points, the inner angle of the bending angle of the workpiece can form an obtuse angle structure. When the workpiece is in shaping, because the first shaping upper mold and the first shaping lower mold are both provided with obtuse upper shaping convex inflection points and lower shaping convex inflection points, the inner angle of the bending angle of the workpiece can maintain an obtuse angle structure in the shaping process. In the bending and shaping processes, the inner angle of the bending angle of the workpiece is an obtuse angle structure, which can improve the stability and accuracy of the workpiece forming size and reduce the springback of the workpiece, thereby solving the problem that the inner angle of the bending angle during bending and forming in the existing bending and forming process is an arc structure, which is easy to cause the workpiece to rebound and affect the dimensional stability.

[0012] In some embodiments, a circular arc-shaped upper bending concave inflection point is further provided at the connection of the bending surface of the upper bending mold;

[0013] The connection of the bending surface of the lower bending die is also provided with an arc-shaped lower bending concave inflection point;

[0014] The connection between the shaping surfaces of the first shaping upper mold is also provided with an arc-shaped upper shaping concave inflection point;

[0015] The connection of the shaping surface of the first shaping lower mold is also provided with an arc-shaped lower shaping concave inflection point.

[0016] Therefore, the upper bending concave inflection point and the lower bending concave inflection point of the bending upper mold and the bending lower mold can make the outer angle of the bending angle of the workpiece form an arc structure, and make the outer angle and inner angle of the bending angle form an arc-type and obtuse-angle structure coordination. In this way, the bending process of the workpiece is less affected, and the dimensional stability of the workpiece after bending can be improved, and the springback is reduced; when the workpiece is shaped, the upper shaping concave inflection point and the lower shaping concave inflection point of the arc type are also provided, so that the bending angle of the workpiece during shaping keeps the outer angle as an arc type and the inner angle as an obtuse angle type, thereby reducing the springback of the workpiece.

[0017] In some embodiments, the upper bending mold includes an upper first bending surface, an upper second bending surface, and an upper third bending surface;

[0018] The connection between the upper first bending surface and the upper second bending surface forms an upper bending convex inflection point; the connection between the upper second bending surface and the upper third bending surface forms an upper bending concave inflection point;

[0019] The lower bending die comprises a lower first bending surface, a lower second bending surface and a lower third bending surface;

[0020] A lower bending concave inflection point is formed at a connection between the lower first bending surface and the lower second bending surface;

[0021] A lower bending convex inflection point is formed at a connection between the lower second bending surface and the lower third bending surface.

[0022] Therefore, the upper bending die and the lower bending die are both provided with three bending surfaces to form a "Z"-shaped structure.

[0023] To further illustrate, the upper second bending surface is an inclined surface, and the upper first bending surface and the upper third bending surface are arranged in parallel.

[0024] To further illustrate, the lower second bending surface is an inclined surface, and the lower first bending surface and the lower third bending surface are arranged in parallel.

[0025] In some embodiments, the first shaping upper mold includes an upper first shaping surface, an upper second shaping surface, and an upper third shaping surface;

[0026] The connection between the upper first shaping surface and the upper second shaping surface forms an upper shaping convex inflection point;

[0027] The connection between the upper second shaping surface and the upper third shaping surface forms an upper shaping concave inflection point;

[0028] The first shaping lower mold comprises a lower first shaping surface, a lower second shaping surface and a lower third shaping surface;

[0029] A lower shaping concave inflection point is formed at a connection between the lower first shaping surface and the lower second shaping surface;

[0030] The connection between the lower second shaping surface and the lower third shaping surface forms a lower shaping convex inflection point.

[0031] Therefore, the first shaping upper mold and the first shaping lower mold are both provided with three shaping surfaces to form a "Z"-shaped structure.

[0032] In some embodiments, the upper third shaping surface is arranged to extend upwardly and obliquely, and the lower third shaping surface is arranged to extend upwardly and obliquely.

[0033] Therefore, the inclined arrangement of the upper third shaping surface and the lower third shaping surface is conducive to the shaping of the workpiece in stages, thereby improving the accuracy and dimensional stability of the workpiece.

[0034] In some embodiments, the inclination angle of the upper third shaping surface is between 0.5 and 1.5 degrees, and the inclination angle of the lower third shaping surface is between 0.5 and 1.5 degrees.

[0035] In some embodiments, the mold set further includes a second shaping mold, and the second shaping mold includes a second shaping upper mold and a second shaping lower mold.

[0036] Therefore, the second shaping die is used to perform secondary shaping on the workpiece to form the final shape and size. Performing shaping twice is beneficial to improving the shaping accuracy, reducing springback, and improving dimensional stability.

[0037] In some embodiments, the second shaping die further includes a correction block, which abuts against the upper surface of the workpiece.

[0038] Therefore, the correction block is used to correct the bending degree of the workpiece and improve the dimensional accuracy of the workpiece.

[0039] In some embodiments, the connection points of the shaping surfaces of the second shaping upper mold are all arc connections; and the connection points of the shaping surfaces of the second shaping lower mold are all arc connections.

[0040] Therefore, the shaping surfaces of the second shaping upper mold and the second shaping lower mold are composed of three surfaces, and the connection between each surface is an arc connection, so that the inner angle and outer angle of the bending angle of the workpiece after the secondary shaping are both arc structures, thereby improving the strength of the bending angle.

[0041] The bending and stamping forming method is characterized by comprising the following steps:

[0042] The workpiece is placed in a bending die for bending, and the outer angle of the bending angle of the workpiece forms an arc structure, and the inner angle of the bending angle forms an obtuse angle structure;

[0043] The workpiece is placed in a first shaping die for primary shaping, and the outer angle of the bending angle of the workpiece is kept in an arc structure, and the inner angle of the bending angle is kept in an obtuse angle structure;

[0044] The workpiece is placed in a second shaping die for secondary shaping, and the inner angle of the bending angle of the workpiece is formed into an arc structure.

[0045] The beneficial effects of the present invention are as follows: the bending surface of the bending die is provided with an obtuse-angled bending convex inflection point, and the shaping surface of the first shaping die is provided with an obtuse-angled bending convex inflection point, so that the workpiece has an obtuse-angled bending inner angle when bending and shaping, which is beneficial to reduce bending springback, thereby improving dimensional stability, improving quality qualification rate, and optimizing the bending shaping molding process;

[0046] In addition, the bending die is also provided with an arc-shaped concave inflection point, and the first shaping die is also provided with an arc-shaped shaping concave inflection point. The arc-shaped concave inflection point and the obtuse-angle convex inflection point cooperate to make the outer angle of the bending angle an arc structure and the inner angle an obtuse-angle structure, which does not affect the bending process while reducing the springback of the workpiece;

[0047] Furthermore, the connection points of the shaping surfaces of the second shaping die are all arc-shaped, so that the inner and outer angles of the bending angle of the workpiece are arc structures, so that the strength of the bending angle of the workpiece is not weakened; in this way, the inner bending angle of the workpiece first forms an obtuse angle structure and then recovers to an arc structure, which reduces springback, improves dimensional stability, and improves the bending process. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A structural diagram of a bending die of a bending and stamping forming module set according to an embodiment of the present invention;

[0049] Figure 2 It is a structural diagram of a first shaping die of a bending and stamping forming die set according to an embodiment of the present invention;

[0050] Figure 3 It is a structural diagram of a second shaping die of a bending and stamping forming die set according to an embodiment of the present invention;

[0051] Figure 4 A bending and stamping flow chart of a bending and stamping forming module according to an embodiment of the present invention;

[0052] Figure 5 A deformation flow chart of a workpiece bending, stamping and shaping process of a bending, stamping and forming module according to an embodiment of the present invention;

[0053] Wherein: 1-bending mold; 11-bending upper mold; 111-upper bending convex inflection point; 112-upper bending concave inflection point; 11a-upper first bending surface; 11b-upper second bending surface; 11c-upper third bending surface; 12-bending lower mold; 121-lower bending convex inflection point; 122-lower bending concave inflection point; 12a-lower first bending surface; 12b-lower second bending surface; 12c-lower third bending surface;

[0054] 2-first shaping mold; 21-first shaping upper mold; 211-upper shaping convex inflection point; 212-upper shaping concave inflection point; 21a-upper first shaping surface; 21b-upper second shaping surface; 21c-upper third shaping surface; 22-first shaping lower mold; 221-lower shaping convex inflection point; 222-lower shaping concave inflection point; 22a-lower first shaping surface; 22b-lower second shaping surface; 22c-lower third shaping surface;

[0055] 3-second shaping mold; 31-second shaping upper mold; 32-second shaping lower mold; 33-correction block;

[0056] 4-workpiece; 41-upper wall; 42-lower wall; 43-connecting wall. DETAILED DESCRIPTION

[0057] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0058] refer to Figures 1 to 5 , a bending and stamping forming module group, including a bending die 1 and a first shaping die 2, the bending die 1 including a bending upper die 11 and a bending lower die 12;

[0059] The connection of the bending surface of the upper bending mold 11 is provided with an obtuse upper bending convex inflection point 111;

[0060] The connection of the bending surface of the lower bending die 12 is provided with an obtuse lower bending convex inflection point 121;

[0061] The first shaping mold 2 includes a first shaping upper mold 21 and a first shaping lower mold 22;

[0062] The connection between the shaping surfaces of the first shaping upper mold 21 is provided with an obtuse upper shaping convex inflection point 211;

[0063] An obtuse lower shaping convex inflection point 221 is provided at the connection of the shaping surfaces of the first shaping lower die 22 .

[0064] Further explanation, the connection of the bending surface of the upper bending mold 11 is also provided with an arc-shaped upper bending concave inflection point 112;

[0065] The connection of the bending surface of the lower bending die 12 is also provided with an arc-shaped lower bending concave inflection point 122;

[0066] The connection between the shaping surfaces of the first shaping upper mold 21 is also provided with an arc-shaped upper shaping concave inflection point 212;

[0067] A circular arc-shaped lower shaping concave inflection point 222 is further provided at the connection of the shaping surfaces of the first shaping lower mold 22 .

[0068] To further illustrate, the upper bending mold 11 includes an upper first bending surface 11a, an upper second bending surface 11b and an upper third bending surface 11c;

[0069] The connection between the upper first bending surface 11a and the upper second bending surface 11b forms an upper bending convex inflection point 111; the connection between the upper second bending surface 11b and the upper third bending surface 11c forms an upper bending concave inflection point 112;

[0070] The lower bending mold 12 includes a lower first bending surface 12a, a lower second bending surface 12b and a lower third bending surface 12c;

[0071] A lower bending concave inflection point 122 is formed at the connection between the lower first bending surface 12a and the lower second bending surface 12b;

[0072] A lower bending convex inflection point 121 is formed at a connection between the lower second bending surface 12b and the lower third bending surface 12c.

[0073] To further explain, the upper second bending surface 11b is an inclined surface, and the upper first bending surface 11a and the upper third bending surface 11c are arranged in parallel.

[0074] To further illustrate, the lower second bending surface 12b is an inclined surface, and the lower first bending surface 12a and the lower third bending surface 12c are arranged in parallel.

[0075] Further explained, the first shaping upper mold 21 includes an upper first shaping surface 21a, an upper second shaping surface 21b and an upper third shaping surface 21c;

[0076] The connection between the upper first shaping surface 21a and the upper second shaping surface 21b forms an upper shaping convex inflection point 211;

[0077] The connection between the upper second shaping surface 21b and the upper third shaping surface 21c forms an upper shaping concave inflection point 212;

[0078] The first shaping lower mold 22 includes a lower first shaping surface 22a, a lower second shaping surface 22b and a lower third shaping surface 22c;

[0079] A lower shaping concave inflection point 222 is formed at the connection between the lower first shaping surface 22a and the lower second shaping surface 22b;

[0080] A lower shaping convex inflection point 221 is formed at a connection between the lower second shaping surface 22 b and the lower third shaping surface 22 c.

[0081] To further explain, the upper third shaping surface 21c is arranged to extend upwardly and obliquely, and the lower third shaping surface 22c is arranged to extend upwardly and obliquely.

[0082] To further illustrate, the inclination angle of the upper third shaping surface 21c is between 0.5-1.5 degrees.

[0083] To further illustrate, the inclination angle of the lower third shaping surface 22c is between 0.5-1.5 degrees.

[0084] To further explain, the bending and stamping forming module set also includes a second shaping die 3 , and the second shaping die 3 includes a second shaping upper die 31 and a second shaping lower die 32 .

[0085] To further explain, the second shaping die 3 further includes a correction block 33 , which abuts against the upper surface of the workpiece 4 .

[0086] To further explain, the correction block 33 is in contact with the upper surface of the upper wall 41 of the workpiece 4 .

[0087] To further illustrate, the connection points of the shaping surfaces of the second shaping upper mold 31 are all arc connections; and the connection points of the shaping surfaces of the second shaping lower mold 32 are all arc connections.

[0088] The bending and stamping forming method comprises the following steps:

[0089] The workpiece 4 is placed in the bending die 1 for bending, and the outer angle of the bending angle of the workpiece 4 forms an arc structure, and the inner angle of the bending angle forms an obtuse angle structure;

[0090] The workpiece 4 is placed in the first shaping die 2 for primary shaping, and the outer angle of the bending angle of the workpiece 4 is kept in an arc structure, and the inner angle of the bending angle is kept in an obtuse angle structure;

[0091] The workpiece 4 is placed in the second shaping die 3 for secondary shaping, and the inner angle of the bending angle of the workpiece 4 is formed into an arc structure.

[0092] Working principle:

[0093] The workpiece 4 is a “Z”-shaped bending stamping part consisting of an upper wall 41 , a lower wall 42 and a connecting wall 43 . The bending stamping forming die is used to bend and shape the plate of the workpiece 4 .

[0094] The bending and stamping forming die comprises a bending die 1, a first shaping die 2 and a second shaping die 3. The workpiece 4 is first bent and then subjected to secondary shaping to obtain a final product.

[0095] The bending surface of the upper bending mold 11 is provided with an arc-shaped upper bending concave inflection point 112 and an obtuse-angle upper bending convex inflection point 111, and the corresponding bending surface of the lower bending mold 12 is provided with an obtuse-angle lower bending convex inflection point 121 and an arc-shaped lower bending concave inflection point 122. The arc-shaped and obtuse-angle structures are matched so that the outer angle of the bending angle is an arc structure and the inner angle of the bending angle is an obtuse-angle structure.

[0096] The arc structure is conducive to forming and has high strength, while the obtuse angle structure is conducive to reducing springback. The two work together to not only ensure the bending process, but also reduce the springback of the workpiece 4 to a certain extent, improve dimensional stability, and be more conducive to subsequent shaping processes.

[0097] The first shaping die 2 comprises a first shaping upper die 21 and a first shaping lower die 22. The shaping surface of the first shaping upper die 21 is provided with an obtuse upper shaping convex inflection point 211 and an arc-shaped upper shaping concave inflection point 212. The second shaping lower die 32 is provided with a matching arc-shaped lower shaping concave inflection point 222 and an obtuse lower shaping convex inflection point 221, so that the workpiece 4 maintains an obtuse inner angle of the bending angle and an arc outer angle in a single shaping, thereby reducing the rebound of the single shaping and improving the shaping accuracy and dimensional stability.

[0098] The workpiece 4 is shaped for the second time in the second shaping mold 3 to obtain the final product. The connection between the shaping surfaces of the second shaping upper mold 31 and the second shaping lower mold 32 are both arc structures. After shaping, the inner angle of the bending angle of the workpiece 4 is formed into an arc structure, so that the workpiece 4 conforms to the final shape and improves the strength at the bending angle.

[0099] The entire stamping process is bending first and then secondary shaping, using the obtuse angle structure to reduce the springback of bending, thereby improving dimensional stability, dimensional accuracy, bending process and quality.

[0100] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the invention.

Claims

1. Bending and stamping forming module, characterized in that: It comprises a bending die (1) and a first shaping die (2), wherein the bending die (1) comprises an upper bending die (11) and a lower bending die (12); The connection of the bending surface of the upper bending mold (11) is provided with an obtuse-angle upper bending convex inflection point (111) and an arc-shaped upper bending concave inflection point (112); The connection of the bending surface of the lower bending mold (12) is provided with an obtuse-angle lower bending convex inflection point (121) and an arc-shaped lower bending concave inflection point (122); The obtuse upper bending convex inflection point (111) matches the arc-shaped lower bending concave inflection point (122); The arc-shaped upper bending concave inflection point (112) matches the obtuse-angled lower bending convex inflection point (121); The first shaping mold (2) comprises a first shaping upper mold (21) and a first shaping lower mold (22); The connection between the shaping surfaces of the first shaping upper mold (21) is provided with an obtuse-angle upper shaping convex inflection point (211) and an arc-shaped upper shaping concave inflection point (212); The connection of the shaping surface of the first shaping lower mold (22) is provided with an obtuse-angle lower shaping convex inflection point (221) and an arc-shaped lower shaping concave inflection point (222); The upper shaping convex inflection point (211) of obtuse angle matches the lower shaping concave inflection point (222) of circular arc; The arc-shaped upper shaping concave inflection point (212) matches the obtuse-angled lower shaping convex inflection point (221); It also includes a second shaping mold (3), wherein the second shaping mold (3) includes a second shaping upper mold (31) and a second shaping lower mold (32); The connection points of the shaping surfaces of the second shaping upper mold (31) are all arc connections; and the connection points of the shaping surfaces of the second shaping lower mold (32) are all arc connections.

2. The bending and stamping forming module according to claim 1, characterized in that: The upper bending mold (11) comprises an upper first bending surface (11a), an upper second bending surface (11b) and an upper third bending surface (11c); The upper convex bending point (111) is formed at the connection between the upper first bending surface (11a) and the upper second bending surface (11b); The upper concave bending point (112) is formed at the connection between the upper second bending surface (11b) and the upper third bending surface (11c); The lower bending mold (12) comprises a lower first bending surface (12a), a lower second bending surface (12b) and a lower third bending surface (12c); The connection between the lower first bending surface (12a) and the lower second bending surface (12b) forms the lower bending concave inflection point (122); The connection between the lower second bending surface (12b) and the lower third bending surface (12c) forms the lower bending convex inflection point (121).

3. The bending and stamping forming module according to claim 1, characterized in that: The first shaping upper mold (21) comprises an upper first shaping surface (21a), an upper second shaping surface (21b) and an upper third shaping surface (21c); The upper shaping convex inflection point (211) is formed at the connection between the upper first shaping surface (21a) and the upper second shaping surface (21b); The upper shaping concave inflection point (212) is formed at the connection between the upper second shaping surface (21b) and the upper third shaping surface (21c); The first shaping lower mold (22) comprises a lower first shaping surface (22a), a lower second shaping surface (22b) and a lower third shaping surface (22c); The connection between the lower first shaping surface (22a) and the lower second shaping surface (22b) forms the lower shaping concave inflection point (222); The connection between the lower second shaping surface (22b) and the lower third shaping surface (22c) forms the lower shaping convex inflection point (221).

4. The bending and stamping forming module according to claim 3, characterized in that: The upper third shaping surface (21c) is arranged to extend upwardly and obliquely, and the lower third shaping surface (22c) is arranged to extend upwardly and obliquely.

5. The bending and stamping forming module according to claim 1, characterized in that: The second shaping die (3) further comprises a correction block (33), wherein the correction block (33) abuts against the upper surface of the workpiece (4).

6. A bending and stamping forming method, based on the bending and stamping forming module set according to claim 1, comprising the following steps: Placing a workpiece (4) in a bending die (1) for bending, and making the outer angle of the bending angle of the workpiece (4) form an arc structure, and the inner angle of the bending angle form an obtuse angle structure; The workpiece (4) is placed in a first shaping die (2) for primary shaping, and the outer angle of the bending angle of the workpiece (4) is kept in an arc structure, and the inner angle of the bending angle is kept in an obtuse angle structure; The workpiece (4) is placed in a second shaping die (3) for secondary shaping, and the inner angle of the bending angle of the workpiece (4) is formed into an arc structure.

Images