Roll stamping die for changing the flow mode of sheet material

Abstract

The present invention relates to a roll stamping die for changing the flow mode of a sheet in the technical field of sheet forming, which includes a first die set, a second die set, a spacing adjustment component and an auxiliary die set; the first die set and the second die set are used to drive the sheet to form by the cooperation of a punch and a forming groove; the spacing adjustment component includes a connecting piece and a spacer, the spacer is sleeved on the connecting piece, the auxiliary die set includes multiple pairs of auxiliary dies arranged in pairs, and each pair of auxiliary dies is symmetrically connected to the opposite sides of the first die through the connecting piece, and the two spacers are respectively clamped between the first auxiliary die and the first die and between the second auxiliary die and the first die; during the process of driving the sheet to form by the cooperation of the punch and the forming groove, the first auxiliary die and the second auxiliary die respectively contact the sheet and change the flow mode of the sheet by changing the shape of the sheet. This application weakens the stress influence of the subsequent forming process on the formed structure in the previous process and improves the forming accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal forming, and more particularly, to a roll stamping die for changing the flow mode of a sheet metal. Background Art

[0002] The roll stamping process is a composite forming process. By combining the stamping process and the roll pressing process, the roll stamping process can manufacture long straight beam parts through an incremental forming method.

[0003] During the roll stamping process, due to the incremental forming characteristics, discrete die blocks often cannot provide sufficient restraint to the material, resulting in the accuracy of sheet metal forming being affected. For example, the patent with the publication number CN209238831U discloses a forming die, which includes a first die assembly and a second die assembly. The first die assembly includes two first modules, at least one first adjusting piece and a plurality of first connecting pieces, and at least one first adjusting piece extends along a first horizontal direction respectively. Each first adjusting piece is arranged in sequence in a second horizontal direction and is clamped between the two first modules. The second die assembly includes two second modules, at least one second adjusting piece and a plurality of second connecting pieces, and at least one second adjusting piece extends along the first horizontal direction respectively. Each second adjusting piece is arranged in sequence in the second horizontal direction and is clamped between the two second modules. The first die assembly and the second die assembly are matched with each other, and the forming die is configured to form the sheet metal by pressing the first die assembly and the second die assembly against both sides of the sheet metal respectively. The above problems exist in this patented technology. Summary of the Invention

[0004] Aiming at the defects in the prior art, the purpose of the present invention is to provide a roll stamping die for changing the flow mode of a sheet metal.

[0005] According to a roll stamping die for changing the flow mode of a sheet metal provided by the present invention, it includes a first die set, a second die set, a spacing adjustment component and an auxiliary die set;

[0006] The first die set includes a plurality of first dies, and the first dies are provided with punches. The second die set includes a plurality of second dies, and the second dies are provided with forming grooves. The first dies and the second dies are arranged in an adapted manner, and the punches and the forming grooves cooperate to drive the sheet metal to form;

[0007] The spacing adjustment assembly includes a connecting member and a spacer. The spacer is sleeved on the connecting member. The auxiliary mold set includes multiple pairs of auxiliary molds. Two molds in each pair of auxiliary molds are respectively denoted as a first auxiliary mold and a second auxiliary mold. The first auxiliary mold and the second auxiliary mold are symmetrically connected to opposite sides of the first mold through the connecting member respectively. The connecting member connecting the first auxiliary mold and the first mold is denoted as a first connecting member, and the connecting member connecting the second auxiliary mold and the first mold is denoted as a second connecting member. Two groups of spacers are respectively clamped between the first auxiliary mold and the first mold and between the second auxiliary mold and the first mold. The two groups of spacers are respectively denoted as a first spacer and a second spacer;

[0008] During the process that the punch cooperates with the forming groove to drive the forming of the sheet, the first auxiliary mold and the second auxiliary mold are respectively in contact with the sheet, and the first auxiliary mold and the second auxiliary mold change the flow mode of the sheet by changing the shape of the sheet.

[0009] In some embodiments, the axial lengths of the first spacer and the second spacer are equal or unequal.

[0010] In some embodiments, the first connecting member is a screw. One end of the first connecting member sequentially passes through the first auxiliary mold and the first spacer and then is connected to the first mold, and the other end of the first connecting member is connected to a nut. By screwing the nut, the first spacer is clamped between the first mold and the first auxiliary mold.

[0011] In some embodiments, the second connecting member is a screw. One end of the second connecting member sequentially passes through the second auxiliary mold and the second spacer and then is connected to the first mold, and the other end of the second connecting member is connected to the nut. By screwing the nut, the second spacer is clamped between the first mold and the second auxiliary mold.

[0012] In some embodiments, the first spacer and the second spacer are of a sleeve structure.

[0013] In some embodiments, the first spacer and the second spacer are elastomers.

[0014] In some embodiments, the elastomer is a rubber sleeve or a spring.

[0015] In some embodiments, a first crimping portion is formed on a side of the first auxiliary mold adjacent to the first mold. The first crimping portion is formed with an inclined surface or a factory-shaped structural surface by cutting, and the first crimping portion is in contact with the sheet.

[0016] In some embodiments, a second crimping portion is formed on a side of the second auxiliary mold adjacent to the first mold. The second crimping portion is formed with an inclined surface or a factory-shaped structural surface by material removal, and the second crimping portion contacts the plate.

[0017] In some embodiments, the first mold is a convex-shaped structure.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present application, by arranging auxiliary molds on both sides of the first mold to contact the plate and apply corresponding binding forces during the forming process of the plate, the stress influence of the current forming process on the already formed structure in the previous process is weakened, and the forming accuracy is improved.

[0020] 2. In the present application, by changing the structural characteristics of the spacer, that is, the spacer is set as an elastic member, the axial length of the spacer can be changed by the elastic force of the elastic member, which is convenient to operate and reduces costs.

[0021] 3. In the present application, by changing the deformation of the auxiliary mold structure, the constraint conditions of the auxiliary mold on the plate are changed, and the forming accuracy of the plate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present invention will become more apparent:

[0023] Figure 1 It is a schematic diagram of the overall structure of the roll stamping die of the present invention;

[0024] Figure 2 For Figure 1 Partial sectional structure diagram;

[0025] Figure 3 It is a schematic diagram of the structure of the first mold and the auxiliary mold of the roll stamping die of the present invention under adjustment;

[0026] Figure 4 It is a schematic diagram of the structure of an embodiment of the spacing adjustment assembly of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of an embodiment in which the spacer in the spacing adjustment assembly of the present invention is an elastic member;

[0028] Figure 6 For Figure 5 Partial structural sectional view. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those of ordinary skill in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0030] Embodiment 1

[0031] This embodiment provides a roll punching forming die for changing the flow mode of a sheet, including a first die set 1, a second die set 2, a spacing adjustment assembly 3, and an auxiliary die set 4. The first die set 1 and the second die set 2 are arranged in an upper and lower matching manner. The first die set 1 is mainly composed of a plurality of independent first dies 11, and the shapes of the first dies 11 in the same first die set 1 are the same. The shape of the first die 11 is a convex shape, and the protruding end part thereof is a punch 111. The second die set 2 is mainly composed of a plurality of independent second dies 21, and the shapes of the second dies in the same second die set 2 are the same. A forming groove 211 is provided on the end face of the second die 21. The forming groove 211 is adapted to be provided with parameters such as the shape and size of the punch 111, and the sheet is driven to be formed through the cooperation of the forming groove 211 and the punch 111.

[0032] The spacing adjustment assembly 3 is used to adjust the spacing between the auxiliary die set 4 and the first die set 1. The spacing adjustment assembly 3 includes a connecting member 31 and a spacer 32, and the spacer 32 is sleeved on the connecting member 31. In some embodiments, a relative sliding sleeving method of the connecting member 31 and the spacer 32 is adopted. In some embodiments, the connecting member 31 is a screw rod, and the spacer 32 is a sleeve. Among them, a profile surface adapted to the spacer 32 of the sleeve structure is provided in the middle of the connecting member 31 of the screw rod structure. The auxiliary die set 4 is mainly composed of a plurality of pairs of first auxiliary dies 41 and second auxiliary dies 42 arranged in pairs. The number of pairs of the first auxiliary dies 41 and the second auxiliary dies 42 arranged in pairs is the same as the number of groups of the first dies 11. Each pair of the first auxiliary dies 41 and the second auxiliary dies 42 are symmetrically connected to the opposite sides of the first die 11 through the spacing adjustment assembly 3. The connecting member 31 and the spacer 32 used for connecting the first auxiliary die 41 and the first die 11 are denoted as the first connecting member 311 and the first spacer 321. The connecting member 31 and the spacer 32 used for connecting the second auxiliary die 42 and the first die 11 are denoted as the second connecting member 312 and the second spacer 321.

[0033] One end of the first connecting member 311 of the screw structure sequentially passes through the first auxiliary mold 41 and the first spacer 321 and is tightly connected to one side surface of the first mold 11 by an interference fit or a threaded connection. A nut 5 is threadedly connected to the other end of the first connecting member 311. By screwing the nut 5, the first spacer 321 is clamped between the first auxiliary mold 41 and the first mold 11. One end of the second connecting member 312 of the screw structure sequentially passes through the second auxiliary mold 42 and the second spacer 321 and is tightly connected to the other side surface of the first mold 11 by an interference fit or a threaded connection. A nut 5 is threadedly connected to the other end of the second connecting member 312. By screwing the nut 5, the second spacer 322 is clamped between the second auxiliary mold 42 and the first mold 11. In some embodiments, after the first auxiliary mold 41 and the second auxiliary mold 42 are connected to opposite side surfaces of the first mold 11, the upper end surfaces of the first auxiliary mold 41, the first mold 11, and the second auxiliary mold 42 are substantially flush, and the lower end surfaces of the three can be kept substantially flush or adjusted to be of different heights according to actual situations.

[0034] In this embodiment, by connecting the first auxiliary mold 41 and the second auxiliary mold 42 to opposite sides of the first mold 11 respectively, when the sheet is roll-punched and formed by the cooperation of the punch 11 and the forming groove 21, the first auxiliary mold 41 and the second auxiliary mold 42 are respectively used to contact and limit the upward warping of the sheet parts on both sides of the punch 11, thereby changing the V-shaped structure presented by the sheet during the roll-punching process into a wavy shape and changing the flow mode of the sheet during the forming process. That is, in this embodiment, by arranging auxiliary molds that contact the sheet and apply corresponding binding forces to the sheet during the forming process on both sides of the first mold, the stress influence of the subsequent forming process on the already formed structure in the previous process is weakened, and the forming accuracy is improved.

[0035] In the above embodiments, the axial lengths of the first spacer 321 and the second spacer 322 of the sleeve structure may be equal or unequal. The axial length L1 of the first spacer 321 and the axial length L2 of the second spacer 322 located on both sides of the first mold 11 are mainly adapted according to the final roll-punched forming shape of the sheet.

[0036] Embodiment 2

[0037] This Embodiment 2 is a variant formed on the basis of Embodiment 1. By changing the structural characteristics of the spacer, that is, the spacer is set as an elastic member, the axial length of the spacer can be changed by the elastic force of the elastic member, which is convenient to operate and reduces costs. Specifically:

[0038] The spacer 32 is an elastic structure. In some embodiments, the spacer 32 is a sleeve structure made of rubber material. In some embodiments, the spacer 32 is a spring structure. In some embodiments, the first spacer 321 and the second spacer 322 are elastic structures made of the same material, such as both being rubber sleeves or both being springs. In some embodiments, the first spacer 321 and the second spacer 322 are elastic structures made of different materials, such as the first spacer 321 being a rubber sleeve and the second spacer 322 being a spring.

[0039] Embodiment 3

[0040] This Embodiment 3 is formed on the basis of Embodiment 1 or Embodiment 2. By changing the deformation of the auxiliary mold structure, the constraint conditions of the auxiliary mold on the plate are changed, and the forming accuracy of the plate is improved. Specifically:

[0041] In some embodiments, a first crimping portion 411 with a flat inclined surface structure is formed on the side of the first auxiliary mold 41 adjacent to the first mold 11 by cutting off the bottom corner. When the inclined first crimping portion 411 contacts the plate, it can be a line contact at the bottom or a surface contact. In some other embodiments, a first crimping portion 411 with a factory-shaped structure is formed on one side of the first auxiliary mold 41 adjacent to the first mold by removing materials. The contact between the factory-shaped first crimping portion 411 and the plate can be the upper and lower two edges, so as to deform the plate with a larger bending angle.

[0042] In some embodiments, the second auxiliary mold 42 forms a second crimping portion 421 with a flat inclined surface or a factory-shaped structure in the same manner as the first auxiliary mold 41 to meet the requirements of the deformation of the plate.

[0043] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0044] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined arbitrarily.

Claims

1. A roll stamping die for changing the flow mode of a sheet, characterized in that, it includes a first die set (1), a second die set (2), a spacing adjustment component (3) and an auxiliary die set (4); The first die set (1) includes a plurality of first dies (11), the first die (11) is provided with a punch (111), the second die set (2) includes a plurality of second dies (21), the second die (21) is provided with a forming groove (211), the first die (11) is adaptively arranged with the second die (21), and the punch (111) and the forming groove (211) cooperate to drive the sheet to form; The spacing adjustment component (3) includes a connecting piece (31) and a spacer (32), the spacer (32) is sleeved on the connecting piece (31), the auxiliary die set (4) includes multiple pairs of auxiliary dies, and the two in each pair of auxiliary dies are respectively denoted as a first auxiliary die (41) and a second auxiliary die (42), the first auxiliary die (41) and the second auxiliary die (42) are symmetrically connected to the opposite sides of the first die (11) through the connecting piece (31) respectively, the connecting piece (31) connecting the first auxiliary die (41) and the first die (11) is denoted as a first connecting piece (311), the connecting piece (31) connecting the second auxiliary die (42) and the first die (11) is denoted as a second connecting piece (312), and the two groups of spacers (32) are respectively clamped between the first auxiliary die (41) and the first die (11) and between the second auxiliary die (42) and the first die (11), and the two groups of spacers (32) are respectively denoted as a first spacer (321) and a second spacer (322); During the process that the punch (111) and the forming groove (211) cooperate to drive the sheet to form, the first auxiliary die (41) and the second auxiliary die (42) are respectively in contact with the sheet, and the first auxiliary die (41) and the second auxiliary die (42) change the flow mode of the sheet by changing the shape of the sheet.

2. The roll stamping die for changing the flow mode of a sheet according to claim 1, characterized in that, The first connecting piece (311) is a screw, one end of the first connecting piece (311) sequentially passes through the first auxiliary die (41) and the first spacer (321) and then is connected to the first die (11), and the other end of the first connecting piece (311) is connected to a nut (5), and by screwing the nut (5), the first spacer (321) is clamped between the first die (11) and the first auxiliary die (41).

3. The roll stamping die for changing the flow mode of a sheet according to claim 1, characterized in that, The second connecting member (312) is a screw rod. One end of the second connecting member (312) sequentially passes through the second auxiliary mold (42) and the second spacer (322) and then is connected to the first mold (11). The other end of the second connecting member (312) is connected to a nut (5). By screwing the nut (5), the second spacer (322) is clamped between the first mold (11) and the second auxiliary mold (42).

4. The roll stamping die for changing the flow mode of the sheet according to any one of claims 1-3, characterized in that, the first spacer (321) and the second spacer (322) are sleeve structures.

5. The roll stamping die for changing the flow mode of the sheet according to claim 4, characterized in that, the first spacer (321) and the second spacer (322) are elastic bodies.

6. The roll stamping die for changing the flow mode of the sheet according to claim 5, characterized in that, the elastic body is a rubber sleeve or a spring.

7. The roll stamping die for changing the flow mode of the sheet according to claim 5, characterized in that, a first crimping portion (411) is formed on one side of the first auxiliary mold (41) adjacent to the first mold (11). The first crimping portion (411) is formed with an inclined surface or a factory-shaped structural surface by a cutting method. The first crimping portion (411) contacts the sheet.

8. The roll stamping die for changing the flow mode of the sheet according to any one of claims 5-7, characterized in that, a second crimping portion (421) is formed on one side of the second auxiliary mold (42) adjacent to the first mold. The second crimping portion (421) is formed with an inclined surface or a factory-shaped structural surface by a material cutting method. The second crimping portion (421) contacts the sheet.

9. The roll stamping die for changing the flow mode of the sheet according to claim 1, characterized in that, the first mold (11) is a convex-shaped structure body.

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