Automobile part drawing die

Abstract

The utility model discloses a kind of automobile parts stretch dies, including upper die and lower die, upper die and lower die are equipped with: forming structure, including the core of being equipped in upper die and the cavity of being equipped in lower die, core and cavity are adapted;Guiding structure, including multiple guide posts of being equipped in upper die and multiple sliding holes of being equipped in lower die, multiple guide posts are one-to-one corresponding and inserted in multiple sliding holes;Embrace structure, including multiple limit blocks of being equipped in upper die and multiple limit grooves of being equipped in lower die, multiple limit blocks are one-to-one corresponding and inserted in multiple limit grooves, the side of limit block towards core is equipped with limit surface, limit surface and the groove wall of limit groove are attached. By setting embrace structure, limit block can exert force towards cavity to lower die when forming, the stress from inside to outside that cavity is subjected to when forming is offset to a certain extent, reach the purpose that stretch die is not easy to crack.

Description

Technical Field

[0001] This utility model relates to the field of metal stamping technology, and in particular to a stretching die for automotive parts. Background Technology

[0002] Automotive stretching dies are mainly used to process metal sheets into open hollow parts through plastic deformation. Compared with trimming dies and punching dies, stretching dies experience greater stress during operation and are more prone to cracking, which seriously affects the precision of the produced parts. Therefore, it is necessary to design a stretching die that is not prone to cracking. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a stretching die for automotive parts.

[0004] An automotive parts stretching die according to an embodiment of the present utility model includes an upper die and a lower die, wherein a space is provided between the upper die and the lower die. The molding structure includes a core disposed in the upper mold and a cavity disposed in the lower mold, wherein the core and the cavity are adapted to each other. The guide structure includes a plurality of guide posts disposed on the upper mold and a plurality of sliding holes disposed on the lower mold, wherein the plurality of guide posts are inserted into the plurality of sliding holes in a one-to-one correspondence. The clamping structure includes multiple limiting blocks provided on the upper mold and multiple limiting grooves provided on the lower mold. The multiple limiting blocks are inserted into the multiple limiting grooves one by one. Each limiting block has a limiting surface on the side facing the core, and the limiting surface is in contact with the groove wall of the limiting groove.

[0005] According to the embodiments of the present utility model, the automotive parts stretching die has at least the following technical effects: by setting the clamping structure, the limiting block can apply a force toward the cavity to the lower die during molding, thereby offsetting the stress from the inside to the outside of the cavity during molding to a certain extent, so as to make the stretching die less prone to cracking.

[0006] According to some embodiments of the present invention, the cavity is a horizontally extending strip, and there are two limiting blocks, which are respectively located in front of and behind the core.

[0007] According to some embodiments of the present invention, the limiting block is in the form of a horizontally extending strip.

[0008] According to some embodiments of the present invention, the lower mold includes a first module, a second module, and a third module. The first module is located in front of the second module, and a trapezoidal groove is provided between the first module and the second module. The third module is located within the trapezoidal groove, and the cavity is located within the third module. The lower mold is detachably provided with multiple front-to-back extending tie rods, which are connected between the first module and the second module.

[0009] According to some embodiments of the present invention, the lower mold is provided with a plurality of first through holes, and the plurality of tie rods are respectively disposed in the plurality of first through holes.

[0010] According to some embodiments of this utility model, the tie rod is a smooth bolt.

[0011] According to some embodiments of the present invention, a wavy contact surface is provided between the first module and the second module, and the crest line of the contact surface is vertically arranged.

[0012] According to some embodiments of the present invention, the top of the lower mold is provided with a boss, and the third module is located in the middle of the boss.

[0013] According to some embodiments of this utility model, the front edge and rear edge of the lower mold are respectively provided with multiple positioning holes.

[0014] According to some embodiments of this utility model, the edges of the positioning port and the limiting groove are both rounded.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded structural diagram of an automotive parts stretching die according to an embodiment of the present invention; Figure 2 yes Figure 1 A top view of the structure of the first module in the diagram; Figure 3 yes Figure 2 Right sectional view of the first module in the diagram; Figure 4 yes Figure 2 A front view diagram of the second module in the diagram; In the attached image: 100-Upper mold; 110-Guide post; 120-Core; 130-Limiting block; 201-Positioning port; 202-Boss; 203-Sliding hole; 204-Limiting groove; 205-First through hole; 206-Trapezoidal groove; 209-Contact surface; 210-First module; 220-Second module; 230-Tie rod; 300-Third module; 301-Cavity; 302-Allowing clearance. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicating the orientation or positional relationship, are 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 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. Furthermore, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number, while "above," "below," "within," etc., are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] The following is for reference. Figures 1 to 4 This invention describes an embodiment of an automotive parts stretching die.

[0021] The automotive parts stretching die of this utility model embodiment is referred to... Figure 1The device includes an upper die 100 and a lower die. The upper die 100 is positioned above the lower die. The upper die 100 and the lower die have a separated state and a closed state. In the separated state, the upper die 100 and the lower die are spaced apart. In the closed state, the upper die 100 and the lower die are in contact. During use, the lower die is fixedly installed on the worktable of the stamping equipment, and the upper die 100 is fixedly installed on the slider of the stamping equipment. When the stamping equipment is running, the automotive parts stretching die can be driven from the separated state to the closed state to complete the stretching and forming of the automotive parts. A forming structure, a guiding structure, and a clamping structure are provided between the upper die 100 and the lower die.

[0022] Taking the mold-closed state as an example, the molding structure includes a core 120 provided in the upper mold 100 and a cavity 301 provided in the lower mold. The core 120 protrudes downward from the bottom of the upper mold 100, and the cavity 301 is recessed downward from the top of the lower mold. The core 120 and the cavity 301 are adapted to each other, so that after the core 120 moves downward and inserts into the cavity 301, there will be a molding gap between the core 120 and the cavity 301 to accommodate the stretched metal component.

[0023] The guiding structure includes multiple guide posts 110 on the upper die 100 and multiple sliding holes 203 on the lower die. The guide posts 110 extend downward from the bottom of the upper die 100, and the sliding holes 203 are vertically arranged. The number of guide posts 110 and the number of sliding holes 203 can both be four. The four guide posts 110 are located at the four corners of the upper die 100, and the multiple guide posts 110 are inserted into the multiple sliding holes 203 one by one. In this way, when the stamping equipment drives the upper die 100 to move downward during operation, the guide posts 110 first insert into the sliding holes 203 to position the upper die 100 and the lower die, thus avoiding misalignment between the upper die 100 and the lower die.

[0024] The engaging structure includes multiple limiting blocks 130 provided on the upper mold 100 and multiple limiting grooves 204 provided on the lower mold. The limiting blocks 130 protrude downward from the bottom of the upper mold 100, and the limiting grooves 204 are recessed downward from the top of the lower mold. The multiple limiting blocks 130 are inserted into the multiple limiting grooves 204 one by one. The limiting blocks 130 have a limiting surface on the side facing the core 120, and the limiting surface fits against the groove wall of the limiting groove 204.

[0025] Understandably, the lower part of a stretching die is generally prone to cracking because it experiences greater stress due to gravity. The cavity 301 of the stretching die is also prone to cracking because the stress on it during molding is directed from the inside out. This invention places the cavity 301 in the lower die, making the lower die a more vulnerable part. This means that crack prevention design primarily focuses on the lower die. By incorporating a clamping structure, the limiting block 130 applies a force towards the cavity 301 to the lower die during molding, thus mitigating the inside-out stress on the cavity 301 and preventing cracking of the stretching die.

[0026] In some embodiments of this utility model, the cavity 301 is a horizontally extending strip, and there are two limiting blocks 130, which are respectively located in front of and behind the core 120. Correspondingly, two limiting grooves 204 are respectively located in front of and behind the cavity 301. The strip-shaped cavity 301 is the basic structure for manufacturing automotive front bumpers, rear bumpers, and other parts, and has a wide range of applications. It can be understood that, since the cavity 301 is a horizontally extending strip, the stress on the lower mold during molding is mostly the stress from the cavity 301 backward and the stress from the cavity 301 forward. By setting the two limiting blocks 130 in front of and behind the core 120, the forces applied by the two limiting blocks 130 to the lower mold are backward and forward, which are adapted to the stress on the lower mold.

[0027] In some embodiments of this utility model, the limiting block 130 is a horizontally extending strip. This results in a larger contact area between the limiting block 130 and the limiting groove 204, enabling it to withstand greater force transmission and providing a more stable structure. Furthermore, the edges of the limiting block 130 are rounded to avoid stress concentration and to facilitate smoother insertion into the limiting groove 204.

[0028] In some embodiments of this utility model, reference is made to Figure 3 The lower mold includes a first module 210, a second module 220, and a third module 300. The first module 210 is located in front of the second module 220. A trapezoidal groove 206 is provided between the first module 210 and the second module 220. A first groove is provided on the upper rear side of the first module 210. (Refer to...) Figure 4The second module 220 has a second groove on its upper front side. The trapezoidal groove 206 is formed by combining the first groove and the second groove. The front side of the trapezoidal groove 206 has a first wall extending downward from front to back, and the rear side of the trapezoidal groove 206 has a second wall extending upward from front to back. The third module 300 is disposed in the trapezoidal groove 206. The front side of the third module 300 has a first inclined surface that fits against the first wall. The rear side of the third module 300 has a second inclined surface that fits against the second wall. A clearance gap 302 is provided between the bottom surface of the third module 300 and the bottom surface of the trapezoidal groove 206. The cavity 301 is disposed in the third module. When block 300 and cavity 301 are subjected to a downward force, part of the force will be converted into a force that causes the first module 210 to move forward and the second module 220 to move backward. The lower mold is detachably provided with multiple front-to-back extending tie rods 230, which connect the first module 210 and the second module 220. In the event of an accident that may cause the mold to crack, such as the upper and lower molds colliding hard or two plates being mistakenly stacked together and fed in, the tie rods 230 will deform and break first to avoid damage to the lower mold. During maintenance, the tie rods 230 can be replaced. The replacement of the lower mold is avoided by replacing the tie rods 230, which greatly reduces maintenance costs.

[0029] In some embodiments of this utility model, the lower mold is provided with multiple first through holes 205, and multiple tie rods 230 are correspondingly arranged in the multiple first through holes 205. The multiple first through holes are arranged sequentially and spaced apart along the transverse direction below the trapezoidal groove 206, so that there are more points of force transmission between the first module 210 and the second module 220, which is conducive to uniform force transmission between the first module 210 and the second module 220 and structural stability.

[0030] In some embodiments of this utility model, the pull rod 230 is a smooth bolt, and each pull rod 230 is threaded with a nut. The pull rod 230 extends into the first through hole 205 from one end, passes through the first through hole 205, and is connected to the nut, thus realizing the connection between the first module 210 and the second module 220; the structure is simple and the pull rod 230 is easy to assemble and disassemble.

[0031] In some embodiments of this utility model, reference is made to Figure 2 A wavy contact surface 209 is provided between the first module 210 and the second module 220, with the crests of the contact surface 209 arranged vertically. This avoids the problem of left-right misalignment between the first module 210 and the second module 220, resulting in a more stable structure.

[0032] In some embodiments of this utility model, a boss 202 is provided on the top of the lower mold, and a third module 300 is provided in the middle of the boss 202. Correspondingly, a relief recess is provided on the bottom of the upper mold 100 at the location of the boss 202. The edge of the boss 202 smoothly transitions with the lower mold, and the boss 202 has the function of strengthening the structural strength of the stress-bearing part of the lower mold.

[0033] In some embodiments of this utility model, the front edge and rear edge of the lower die are respectively provided with multiple positioning holes 201. The positioning holes 201 are used to set bolts to install the lower die on the worktable of the stamping equipment; this facilitates the positioning and installation of the lower die on the worktable of the stamping equipment, and can also offset the forward and backward stresses on the lower die during forming to a certain extent.

[0034] In some embodiments of this invention, the edges of the positioning port 201 and the limiting groove 204 are rounded. This avoids stress concentration and better prevents mold cracking.

[0035] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An automotive part stretch die characterized by: It includes an upper mold and a lower mold, and a space is provided between the upper mold and the lower mold: The molding structure includes a core disposed in the upper mold and a cavity disposed in the lower mold, wherein the core and the cavity are adapted to each other. The guide structure includes a plurality of guide posts disposed on the upper mold and a plurality of sliding holes disposed on the lower mold, wherein the plurality of guide posts are inserted into the plurality of sliding holes in a one-to-one correspondence. The clamping structure includes multiple limiting blocks provided on the upper mold and multiple limiting grooves provided on the lower mold. The multiple limiting blocks are inserted into the multiple limiting grooves one by one. Each limiting block has a limiting surface on the side facing the core, and the limiting surface is in contact with the groove wall of the limiting groove.

2. The automotive part stretch-die of claim 1, wherein: The cavity is a horizontally extending strip, and there are two limiting blocks, which are respectively located in front of and behind the core.

3. The automotive part stretch-die of claim 2, wherein: The limiting block is in the shape of a horizontally extending strip.

4. The automotive part stretch-die of claim 1, wherein: The lower mold includes a first module, a second module, and a third module. The first module is located in front of the second module, and a trapezoidal groove is provided between the first module and the second module. The third module is located in the trapezoidal groove, and the cavity is located in the third module. The lower mold is detachably provided with multiple front-to-back extending tie rods, which are connected between the first module and the second module.

5. The automotive part stretch-die of claim 4, wherein: The lower mold is provided with multiple first through holes, and multiple tie rods are respectively arranged in the multiple first through holes.

6. The automotive part stretch-die of claim 5, wherein: The tie rod is a smooth bolt.

7. The automotive part stretch-die of claim 4, wherein: A wavy contact surface is provided between the first module and the second module, and the crest line of the contact surface is set vertically.

8. The automotive part stretch-die of claim 4, wherein: The lower mold has a boss on its top, and the third module is located in the middle of the boss.

9. The automotive part stretch-die of claim 1, wherein: The lower mold has multiple positioning holes on its front and rear edges.

10. The automotive part stretch-die of claim 9, wherein: The edges of both the positioning port and the limiting groove are rounded.

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