Automobile metal plate stamping device convenient to demould

Abstract

The utility model relates to the technical field of stamping, in particular to an automobile metal plate stamping device convenient to demould, which comprises a base, an upper mould, an extension frame and a lower mould, the extension frame is mounted on the base, the upper mould is slidably mounted on the extension frame, the lower mould is mounted on the base, and a stamping groove is arranged on the lower surface of the upper mould. A stamping block corresponding to the stamping groove in position is arranged on the upper surface of the lower die, a demolding mechanism is arranged on the upper die, and the demolding mechanism is provided with a demolding part capable of extending into the stamping groove in the stamping direction. According to the automobile metal plate stamping device convenient to demould, on the premise that normal stamping operation is not affected, the demoulding mechanism is arranged so that a product can conveniently fall off from the mould, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile stamping, and more specifically to an automobile sheet metal stamping device that is easy to demould Background Art

[0002] Automotive sheet metal refers to the metal parts on the outside of the car body, including doors, roofs, window frames, hoods, trunk lids, etc. Automotive sheet metal is usually made of steel, aluminum alloy or other special alloys. In automobile manufacturing, the shape of sheet metal parts is made by stamping and die making, which can ensure that they meet the design requirements. Automotive sheet metal stamping refers to the processing of automotive sheet metal materials into the required shape and size through stamping technology for the manufacture and repair of automobile bodies.

[0003] The stamping of automobile sheet metal parts is completed by closing the upper and lower molds. The stamping can be completed by pulling the upper and lower molds together by a driving part. Usually, the upper and lower molds are respectively provided with a stamping head and a stamping groove to facilitate the forming of the sheet metal parts. However, most of the sheet metal parts will remain in the stamping groove after stamping. Due to the large impact force of the stamping, the sheet metal parts are easy to fit tightly with the stamping groove, resulting in difficulty in demolding. Therefore, it is necessary to propose an automobile sheet metal stamping device that is easy to demold to solve the above-mentioned problems.

[0004] There is a Chinese utility model with application number 201921051428.3, which discloses a stamping die with easy demoulding and simple replacement, including a die handle, an upper die plate fixedly connected to the bottom of the die handle, an upper pad fixedly connected to the bottom of the upper die plate by pins, an upper punch fixing plate fixedly connected to the lower surface of the upper pad by pins, an upper punch fixing plate fixedly connected to the middle of the upper punch fixing plate, guide sleeves fixedly installed on the left and right sides of the bottom of the upper die plate, a die fixing sleeve fixedly connected to the upper end of the lower die plate by bolts, a pressure plate fixedly connected to the top of the die fixing sleeve by bolts, a lower pad fixedly connected to the middle of the die fixing sleeve, a combined die fixedly connected to the upper end of the lower pad, a push rod movably connected to the middle of the combined die, and a pedal movably connected to the lower end of the push rod.

[0005] In the above technical solution, the demoulding operation needs to be performed manually by stepping on a pedal to drive the ejector to eject the product. Manually stepping on the pedal increases the workload of the workers, and it is difficult to control the force manually, which may cause the force applied by the ejector to the product to deviate and cause product damage. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a mold-release automobile sheet metal stamping device, by arranging a demoulding mechanism in the upper die, so that the stamping assembly can be easily separated from the upper die, thereby avoiding equipment failure and inability to continue working due to the product being stuck in the upper die after stamping, thereby improving the working efficiency of the device.

[0007] In order to solve the above technical problems, the utility model provides a mold-easy automobile sheet metal stamping device, including a machine base, an upper die, an extension frame and a lower die, the extension frame is installed on the machine base, the upper die can be slidably installed on the extension frame, the lower die is installed on the machine base, a stamping groove is provided on the lower surface of the upper die, a stamping block corresponding to the position of the stamping groove is provided on the upper surface of the lower die, a demolding mechanism is provided on the upper die, and the demolding mechanism has a demolding portion that can extend into the stamping groove along the stamping direction.

[0008] In this technical solution, the stamping function is realized by the upper die and the lower die, and the function of the machine base is to fix the position of the upper die and the lower die, and to provide power for stamping. An extension frame is arranged above the machine base, the lower die is fixed on the machine base, the upper die is located above the lower die, and is slidably connected to the extension frame, and the upper die can move in the vertical direction along the extension frame, ensuring that the trajectory of the upper die is controllable during the movement and will not be offset. When stamping, it is only necessary to place the automobile sheet metal between the lower die and the upper die, start the equipment, and the upper die moves downward along the extension plate and presses on the automobile sheet metal to deform the automobile sheet metal until the automobile sheet metal is completely fitted with the upper die and the lower die, so that the automobile sheet metal reaches a preset shape. When the mold is opened, since the automobile sheet metal is completely fitted with the upper die and the lower die, there is a large friction between the automobile sheet metal and the upper die and the lower die. If the automobile sheet metal is left on the lower die after the mold is opened, since the surface of the automobile sheet metal is exposed, it is easy to find a force point to separate the automobile sheet metal from the lower die. If the automobile sheet metal is left in the upper mold, the outer surface of the automobile sheet metal is wrapped by the upper mold, and it is difficult to find an ideal force point to remove the automobile sheet metal from the upper mold. If it is forcibly removed, it may cause damage to the product or device. In order to solve this problem, a demoulding mechanism is set in the upper mold. After the mold is opened, if the automobile sheet metal is stuck in the upper mold, the demoulding mechanism can push the automobile sheet metal out of the upper mold, so that the two can be easily separated from each other.

[0009] Preferably, the demoulding mechanism comprises a demoulding plate and a connecting rod, wherein the demoulding plate is installed in the stamping groove, one end of the connecting rod is connected to the demoulding plate, and the other end of the connecting rod passes through the upper mold and is slidably connected to the upper mold.

[0010] Preferably, the shape of the stripping plate is the same as the shape of the bottom of the punching groove.

[0011] Preferably, a first guide structure is provided on the stripping plate, and the first guide structure is slidably connected to the stamping groove.

[0012] Preferably, the first guide structure comprises guide bars, the guide bars are arranged at both ends of the stripping plate, the inner side surface of the stamping groove is provided with a groove, and the guide bar is slidably connected to the stamping groove.

[0013] Preferably, one end of the connecting rod extending out of the upper mold is connected to a top plate.

[0014] Preferably, the lower surface of the top plate is also connected to a push rod, which passes through the upper mold and is slidably connected to the upper mold.

[0015] Preferably, the length of the push rod is longer than the height of the upper die, and the length of the push rod is shorter than the sum of the depth of the stamping groove and the length of the connecting rod.

[0016] Preferably, a second guide structure is further provided between the upper die and the lower die.

[0017] Preferably, the second guide structure includes a guide rod, which is installed on the upper surface of the lower mold. A guide hole is opened on the bottom surface of the upper mold. The guide rod is aligned with the guide hole in the vertical direction. The guide rod can be inserted into the guide hole and slidably connected with the guide hole.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: the easy-to-demold automobile sheet metal stamping device, by setting a demolding structure in the upper die, makes it easy for the product to be separated from the upper die, and the upper end of the demolding structure is fixed to the top plate, and the top plate can move to different positions according to different working states during stamping, thereby automatically driving the demolding structure to work. A first guide structure is set at both ends of the demolding plate to ensure that the demolding plate will not deviate during operation, thereby causing deformation of the product and affecting product quality. A second guide structure is also set between the upper die and the lower die to ensure that the upper die and the lower die are aligned in the vertical direction during the stamping process without deviation, causing poor stamping and affecting product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the overall structure of the utility model, which is convenient for demoulding automobile sheet metal stamping device;

[0020] Figure 2 It is a structural schematic diagram of an upper die of a mold-releasing automobile sheet metal stamping device of the utility model;

[0021] Figure 3 The utility model is a bottom view of the upper die of the automobile sheet metal stamping device which is convenient for demoulding.

[0022] In the accompanying drawings: 1, machine base; 2, upper mold; 3, extension frame; 4, lower mold; 5, demoulding mechanism; 6, second guide structure; 21, stamping groove; 22, top plate; 23, push rod; 41, stamping block; 51, demoulding plate; 61, guide rod; 62, guide hole; 411, groove; 511, guide strip. DETAILED DESCRIPTION

[0023] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0026] Example 1

[0027] like Figure 1 , 2As shown, a stamping device for automobile sheet metal that is easy to demould comprises a machine base 1, an upper die 2, an extension frame 3 and a lower die 4. The extension frame 3 is mounted on the machine base 1, the upper die 2 can be slidably mounted on the extension frame 3, the lower die 4 is mounted on the machine base 1, a stamping groove 21 is arranged on the lower surface of the upper die 2, a stamping block 41 corresponding to the position of the stamping groove 21 is arranged on the upper surface of the lower die 4, and a demoulding mechanism 5 is arranged on the upper die 2, and the demoulding mechanism 5 has a demoulding portion that can extend into the stamping groove 21 along the stamping direction. The stamping function is realized by the upper die 2 and the lower die 4, and the function of the machine base 1 is to fix the positions of the upper die 2 and the lower die 4, and to provide power for stamping. An extension frame 3 is arranged above the machine base 1, the lower die 4 is fixed on the machine base 1, the upper die 2 is located above the lower die 4, and is slidably connected to the extension frame 3, and the upper die 2 can move in the vertical direction along the extension frame 3, ensuring that the trajectory of the upper die 2 is controllable during the movement and will not deviate. When stamping, it is only necessary to place the automobile sheet metal between the lower mold 4 and the upper mold 2, start the equipment, and the upper mold 2 moves downward along the extension plate 3 and presses on the automobile sheet metal to deform the automobile sheet metal until the automobile sheet metal is completely fitted with the upper mold 2 and the lower mold 4, so that the automobile sheet metal reaches a preset shape. When the mold is opened, since the automobile sheet metal is completely fitted with the upper mold 2 and the lower mold 4, there is a large friction between the automobile sheet metal and the upper mold 2 and the lower mold 4. If the automobile sheet metal is left on the lower mold 4 after the mold is opened, since the surface of the automobile sheet metal is exposed to the outside, it is easy to find a force point to separate the automobile sheet metal from the lower mold 4. If the automobile sheet metal is left in the upper mold 2, the outer surface of the automobile sheet metal is wrapped by the upper mold 2, and it is difficult to find an ideal force point to remove the automobile sheet metal from the upper mold 2. If it is forcibly removed, it may cause damage to the product or device. In order to solve this problem, a demoulding mechanism 5 is provided in the upper die 2. After the mold is opened, if the automobile sheet metal is stuck in the upper die 2, the demoulding mechanism 5 can push the automobile sheet metal out of the upper die 2, so that the two can be easily separated from each other. The shapes of the punching groove 21 and the punching block 41 are designed according to the product, wherein the shape of the punching groove 21 determines the external shape of the product, and the shape of the punching block 41 determines the internal shape of the product. During stamping, the automobile sheet metal is placed between the upper die 2 and the lower die 4, and the positions of the punching groove 21 and the punching block 41 are aligned. After the stamping starts, the lower die 4 remains stationary and the upper die 2 moves downward. Under the pressure of the upper die 2 and the lower die 4, the automobile sheet metal is deformed, the lower surface of the automobile sheet metal is fitted with the surface of the punching block 41, and the upper surface of the automobile sheet metal is fitted with the punching groove 21, and finally the automobile sheet metal is stamped into a product. When the stamping is completed, if the product is stuck in the punching groove 21, it is difficult to disengage. Therefore, the demoulding mechanism 5 is arranged in the stamping groove 21. When the stamping is completed, the upper mold 2 moves upward. When the top of the upper mold 2 contacts the machine base 1, the demoulding mechanism 5 moves downward to eject the product from the stamping groove 21 to realize the demoulding of the product.

[0028] like Figure 2As shown, the demoulding mechanism 5 includes a demoulding plate 51 and a connecting rod 52. The demoulding plate 51 is installed in the stamping groove 21. One end of the connecting rod 52 is connected to the demoulding plate 51, and the other end of the connecting rod 52 passes through the upper mold 2 and is slidably connected to the upper mold 2. The demoulding mechanism 5 pushes the demoulding plate 51 through the connecting rod 52 to push the product out of the stamping groove 21 in the upper mold 2. When the mold is opened, the upper mold 2 moves upward. When the upper mold 2 moves upward and approaches the highest point, the connecting rod 52 first conflicts with the machine base 1, and the demoulding plate 51 connected to the connecting rod 52 also stops moving. The connecting rod 52 is slidably connected to the upper mold 2, and the upper mold 2 can still move upward, so that the demoulding plate 51 in the stamping groove 21 moves downward relative to the upper mold 2, and the product in the stamping groove 21 can be ejected to achieve demoulding.

[0029] like Figure 2 As shown, the shape of the stripper plate 51 is the same as the shape of the bottom of the punching groove 21. The stripper plate 51 is installed in the punching groove 21. During punching, the stripper plate 51 will directly contact the sheet metal, so the shape of the product is affected by the shape of the stripper plate 51. In order to ensure that the shape of the product after punching can be the same as the pre-designed shape, the shape of the stripper plate 51 needs to be the same as the shape of the product, that is, the same as the shape of the bottom of the punching groove 21.

[0030] like Figure 2 As shown, a first guide structure is provided on the stripping plate 51, and the first guide structure is slidably connected to the stamping groove 21. When the stripping plate 51 moves downward, the stripping plate 51 may tilt due to uneven force. On the one hand, the tilting of the stripping plate 51 may cause damage to the part connected to the connecting rod 52. On the other hand, the tilted stripping plate 51 will cause different pressures to be provided to products at different positions, which may cause deformation of the products and affect product quality. Therefore, it is necessary to ensure that the stripping plate 51 remains horizontal during operation. Therefore, a first guide structure is provided at both ends of the stripping plate 51 to ensure that the stripping plate 51 can move along a determined track without tilting.

[0031] like Figure 3 As shown, the first guide structure includes guide bars 511, which are arranged at both ends of the stripper plate 51. The inner side of the punching groove 21 is provided with a groove 411, and the guide bars 511 are slidably connected with the punching groove 21. The moving track of the stripper plate 51 is limited to move only in the vertical direction along the direction of the groove 411. When the stripper plate 51 is tilted, the guide bars 511 fixed at both ends of the stripper plate 511 will conflict with the groove 411, thereby limiting the tilt of the stripper plate 511 and keeping the stripper plate 511 horizontal.

[0032] Example 2

[0033] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 2As shown, one end of the connecting rod 52 extending out of the upper mold 2 is connected to the top plate 22, the top plate 22 is slidably connected to the upper mold 2, and the lower surface of the top plate 22 is fixedly connected to the upper end of the connecting rod 52. The upper surface area of ​​the connecting rod 22 is relatively small. During stamping and demoulding, the position where the base 1 and the connecting rod 22 are in contact will generate a relatively large pressure, which may damage the surface of the base 1. A top plate 22 is additionally provided at the upper end of the connecting rod 22. The upper surface area of ​​the top plate 22 is relatively large. During stamping and demoulding, the larger surface area of ​​the top plate 22 under the same pressure makes the pressure at the contact position between the base 1 and the top plate 22 smaller, thereby avoiding damage to the surface of the base 1.

[0034] like Figure 2 As shown, the lower surface of the top plate 22 is also connected to a push rod 23, which penetrates the upper mold 2 and is slidably connected to the upper mold 2. Since the pressure of the demoulding mechanism 5 comes from the top plate 22, in order to ensure that the demoulding mechanism 5 is evenly stressed, the top plate 22 should be kept in a horizontal state. The push rod 22 connects the top plate 22 with the upper mold 2, restricting the top plate 22 to move only along the length direction of the push rod 23. When the top plate 22 tilts, it will drive the push rod 23 to tilt, which will cause the push rod 23 to conflict with the upper mold 2, inhibiting the tilt of the push rod 23, and ensuring that the top plate 22 is in a horizontal state.

[0035] like Figure 2 As shown, the length of the push rod 23 is longer than the height of the upper die 2, and the length of the push rod 23 is shorter than the sum of the depth of the stamping groove 21 and the length of the connecting rod 52. When the demoulding work is completed, the upper surface of the top plate 22 abuts against the machine base 1, and the lower surface of the top plate 22 abuts against the upper die 2. Since the length of the push rod 23 is longer than the height of the upper die 2, the lower end of the push rod 23 extends from the lower surface of the upper die 2. When the stamping operation is performed, the upper die 2 moves downward. In this process, the lower end of the push rod 23 will first contact the upper surface of the lower die 4, thereby driving the top plate 2 and the demoulding mechanism 5 to stop moving downward, while the upper die 2 keeps moving downward. Finally, the demoulding mechanism 5 is reset in the upper die 2 without affecting the stamping process. At the same time, the length of the push rod 23 is shorter than the sum of the depth of the stamping groove 21 and the length of the connecting rod 52, ensuring that the top plate 22 will not break between the demoulding plate 51 and the top plate 22 due to excessive upward movement relative to the upper die.

[0036] Example 3

[0037] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 1 , 2As shown, a second guide structure 6 is also provided between the upper die 2 and the lower die 4. During the stamping process, the upper die 2 and the lower die 4 need to apply a large pressure to the automobile sheet metal to cause it to deform. During this process, the upper die 2 and the lower die 4 may be relatively offset. Therefore, a second guide structure 6 is required to ensure that the upper die 2 and the lower die 4 remain aligned in the vertical direction during the stamping process.

[0038] like Figure 1 , 2 As shown, the second guide structure 6 includes a guide rod 61, which is mounted on the upper surface of the lower mold 4. A guide hole 62 is provided on the bottom surface of the upper mold 2. The guide rod 61 is aligned with the guide hole 62 in the vertical direction. The guide rod 61 can be inserted into the guide hole 62 and slidably connected with the guide hole 62. When the upper mold 2 and the lower mold 4 are relatively offset, the guide rod 61 and the guide hole 62 will conflict with each other, limiting the relative movement of the upper mold 2 and the lower mold 4 in the horizontal direction, thereby ensuring that the upper mold 2 and the lower mold 4 remain aligned in the vertical direction.

[0039] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A stamping device for automobile sheet metal that is easy to demould, comprising a machine base (1), an upper die (2), an extension frame (3) and a lower die (4), wherein the extension frame (3) is mounted on the machine base (1), the upper die (2) is slidably mounted on the extension frame (3), the lower die (4) is mounted on the machine base (1), a stamping groove (21) is arranged on the lower surface of the upper die (2), and a stamping block (41) corresponding to the position of the stamping groove (21) is arranged on the upper surface of the lower die (4), characterized in that: A demoulding mechanism (5) is provided on the upper die (2), and the demoulding mechanism (5) has a demoulding portion along the stamping direction that can extend into the stamping groove (21).

2. The easy-to-demold automobile sheet metal stamping device according to claim 1, characterized in that: The demoulding mechanism (5) comprises a demoulding plate (51) and a connecting rod (52); the demoulding plate (51) is installed in the stamping groove (21); one end of the connecting rod (52) is connected to the demoulding plate (51); the other end of the connecting rod (52) passes through the upper mold (2) and is slidably connected to the upper mold (2).

3. The easy-to-demold automobile sheet metal stamping device according to claim 2, characterized in that: The shape of the stripping plate (51) is the same as the shape of the bottom of the punching groove (21).

4. The easy-to-demold automobile sheet metal stamping device according to claim 2, characterized in that: The stripping plate (51) is provided with a first guide structure, and the first guide structure is slidably connected to the punching groove (21).

5. The easy-to-demold automobile sheet metal stamping device according to claim 4, characterized in that: The first guide structure comprises guide bars (511), the guide bars (511) are arranged at both ends of the stripping plate (51), the inner side surface of the punching groove (21) is provided with a groove (411), and the guide bars (511) are slidably connected to the punching groove (21).

6. The easy-to-demold automobile sheet metal stamping device according to any one of claims 2 to 5, characterized in that: One end of the connecting rod (52) extending out of the upper mold (2) is connected to a top plate (22).

7. The easy-to-demold automobile sheet metal stamping device according to claim 6, characterized in that: The lower surface of the top plate (22) is also connected to a push rod (23), and the push rod (23) passes through the upper mold (2) and is slidably connected to the upper mold (2).

8. The easy-to-demold automobile sheet metal stamping device according to claim 7, characterized in that: The length of the push rod (23) is longer than the height of the upper die (2), and the length of the push rod (23) is shorter than the sum of the depth of the stamping groove (21) and the length of the connecting rod (52).

9. The easy-to-demold automobile sheet metal stamping device according to claim 1, characterized in that: A second guide structure (6) is also provided between the upper die (2) and the lower die (4).

10. The easy-to-demold automobile sheet metal stamping device according to claim 9, characterized in that: The second guide structure (6) comprises a guide rod (61), wherein the guide rod (61) is mounted on the upper surface of the lower mold (4), and a guide hole (62) is provided on the bottom surface of the upper mold (2). The guide rod (61) is aligned with the guide hole (62) in the vertical direction, and the guide rod (61) can be inserted into the guide hole (62) and slidably connected to the guide hole (62).

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