Fender stamping equipment

Abstract

The utility model provides a fender stamping device which comprises an upper die, a lower die, a gasket, a pair of rotary punches, an elastic component and a punch driver, the upper die and the lower die are oppositely arranged up and down, the gasket is installed at the bottom end of the upper die through the elastic component, and the rotary punches are arranged on the lower die through the elastic component. The rotary punches are symmetrically arranged on the left side and the right side of the upper die through the punch drivers correspondingly, the punch drivers are used for pressing the rotary punches from the upper portion to enable the rotary punches to rotate, and lower die side forming surfaces are arranged on the outer edges of the left side and the right side of the lower die correspondingly. The pair of rotary punches is matched with the pair of lower die side forming surfaces correspondingly and used for bending and forming the edges of the plates. By adopting the fender stamping equipment, the rotary punch can be used for bending the plate for 90 degrees without damaging the surface of the plate, so that even if the plate is provided with a coating, the problem of peeling of the coating can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of fender manufacturing technology, specifically to a fender stamping equipment. Background Technology

[0002] The fender is the outer body panel that covers the wheels. It is named for its resemblance to a bird's wing in shape and position on older vehicles. Based on its installation location, it is divided into front fenders and rear fenders. The front fender is installed at the front wheel and must ensure maximum clearance when the front wheel rotates and bounces.

[0003] Fender materials need to balance strength, lightweight, and cost. Typically, fenders are stamped from steel or aluminum alloy, with sheet steel or aluminum alloy blanks being stamped into shape using a stamping die. In existing technology, during fender stamping, the upper die descends, along with the retainer and upper liner, and the upper liner first contacts the surface of the sheet metal. As the upper die continues to descend, the upper liner, mounted on one side of the retainer, moves vertically while pressing the sheet metal, simultaneously pressing the end of the sheet metal together with the lower punch to form a flange-shaped machining portion. However, as mentioned above, because the upper liner of the retainer moves vertically to bend the end of the material, the surface of the fender is prone to damage, and if other coatings are applied to the surface, peeling of the coating may occur. Utility Model Content

[0004] In view of the defects existing in the prior art, the purpose of this utility model is to provide a fender stamping equipment that can prevent damage to the surface of the sheet metal during bending and forming.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This application provides a fender stamping device, including an upper die, a lower die, a liner, a pair of rotating punches, an elastic member, and a punch driver. The upper die and the lower die are arranged vertically opposite each other. The liner is installed at the bottom end of the upper die through the elastic member. The pair of rotating punches are symmetrically arranged on the left and right sides of the upper die through the punch driver. The punch driver is used to press the rotating punches from above to make them rotate. The left and right outer edges of the lower die are respectively provided with lower die side forming surfaces. The pair of rotating punches respectively cooperate with the pair of lower die side forming surfaces for bending and forming the edge of the sheet metal.

[0007] Furthermore, it also includes a pair of punch holders, which are symmetrically fixedly installed on the left and right sides of the upper mold. The punch holders are block structures with a rectangular cross-section and have cavities. The rotating punch is rotatably installed in the cavities.

[0008] Furthermore, the lower mold side forming surface includes a first lower mold side forming surface extending downward at the outer edge of the left and right sides of the lower mold and a second lower mold side forming surface extending outward from the bottom end of the first lower mold side forming surface.

[0009] Furthermore, the lower side of the rotary punch includes a first punch forming surface and a second punch forming surface. The first punch forming surface is formed with an upwardly inclined shape as it gets closer to the liner, and the second punch forming surface is formed with an upwardly inclined shape as it gets further away from the liner.

[0010] Furthermore, the punch driver includes a first pressing portion, a second pressing portion, and a third pressing portion located toward the rotating punch, the first pressing portion, the second pressing portion, and the third pressing portion being connected to the outer side of the upper die.

[0011] Furthermore, the top end of the third pressing part is higher than the top end of the first pressing part, and the second pressing part has a surface that slopes upward toward the inside of the upper mold. The second pressing part is connected to the first pressing part and the third pressing part.

[0012] Furthermore, the punch holder has a guide hole, in which a rotating shaft is rotatably mounted, and the rotating punch is fixedly mounted on the rotating shaft.

[0013] The beneficial effects of this utility model are as follows:

[0014] By using the aforementioned fender stamping equipment, since the sheet metal can be bent 90 degrees without damaging its surface using a rotating punch, problems such as coating peeling can be prevented even if the sheet metal has a coating. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the structural principle of the fender stamping equipment in the embodiments of this application.

[0016] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the diagram.

[0017] Figure 3 This is a schematic diagram of the structure in which a rotating punch bends a sheet metal at a 90-degree angle in an embodiment of this application.

[0018] Figure 4 This is a schematic diagram of the structure of the rotating punch in this application embodiment for bending the sheet metal at an acute angle.

[0019] Figure 5 This is a schematic diagram of the structure in which the upper mold drives the rotating punch to move downward in an embodiment of this application.

[0020] Figure 6 This is a schematic diagram of the structural state when the upper mold drives the rotating punch to move downward and contact the sheet metal in an embodiment of this application.

[0021] Figure 7 This is a schematic diagram of the structural state in which the rotating punch flips over and presses the sheet metal onto the forming surface of the lower mold in an embodiment of this application.

[0022] Figure 8 This is a schematic diagram of the structural state in which the rotating punch completely presses and adheres the sheet metal to the forming surface of the lower mold in the embodiment of this application. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] See appendix Figure 1 As shown, this embodiment provides a fender stamping apparatus 100, including a lower die 110, an upper die 120, a liner 130, a rotating punch 140, a punch holder 150, and a punch driver 160. The lower die 110 places a sheet metal 10 on its upper surface. The sheet metal 10 may be formed of coated aluminum or the like. The left and right edges of the sheet metal 10 may include a first bent portion 11a and a second bent portion 11b. The first bent portion 11a bends downward at an angle smaller than the final bending angle (e.g., from the center of the sheet metal 10), and the second bent portion 11b bends upward at an angle 90 degrees larger than the first bent portion 11a. A lower die-side forming surface 111 is formed on the outer side of the lower die 110. For example, the lower die 110 may be formed with a central portion protruding upward, creating a height difference with the left and right edges. The lower die 110 can place the central portion of the sheet metal 10, excluding the edges to be bent, on its upper surface. That is, the lower mold side forming surface 111 can be formed on the left and right sides of the central portion of the lower mold 110 and the upper surface of the left and right edges of the lower mold 110. In other words, the lower mold side forming surface 111 can include a first lower mold side forming surface 111a formed on the left and right sides of the central portion of the lower mold 110 and a second lower mold side forming surface 111b formed on the upper surface of the left and right edges of the lower mold 110. When the first bent portion 11a of the sheet 10 is bent 90 degrees relative to the central portion of the sheet 10, and the second bent portion 11b of the sheet 10 is bent 90 degrees relative to the first bent portion 11a of the sheet 10, the first lower mold side forming surface 111a is vertical.

[0025] The upper die 120 descends from the lower die 110 in an upward shape separation state, thereby engaging with the shape of the lower die 110. The upper die 120 is connected to a movable frame (not shown) of a hydraulic or mechanical stamping device. When the movable frame is raised or lowered, the upper die 120 can rise or fall together with the movable frame. The pad 130 is elastically supported at the lower center of the upper die 120. When the upper die 120 descends, it applies pressure to the plate 10 placed on the upper surface of the lower die 110 to fix it.

[0026] The lower surface of the pad 130 can have the same area as the upper surface of the lower die 110, and the upper central portion of the plate 10 can be stably fixed with the widest possible area. The pad 130 can be connected to the upper die via an elastic member such as a gas spring 131. The gas spring 131 performs a spring function using the elasticity of the gas filled in a closed space. During the process of the upper die 120 descending from the position where the pad 130 is in contact with the plate 10 to the molding end position, the gas spring 131 applies a spring force to the pad 130. Therefore, the pad 130 no longer descends with the upper die 120 when in contact with the plate 10, so that while the rotating punch 140 and the lower die 110 bend the edge of the plate 10, the plate 10 can be restrained together with the lower die 110. The rotating punch 140 rises while rotating relative to the upper die 120 to bend the edge of the plate 10 from the outside of the pad 130 toward the molding surface 111 of the lower die while the plate 10 is placed on the upper surface of the lower die 110. Here, the liner 130 may be equipped with a punch stop 132 that contacts the rotating punch 140 in its standby state, preventing the rotating punch 140 from rotating further toward the liner 130. Furthermore, the punch stop 132 repeatedly contacts the rotating punch 140 instead of the liner 130, thereby protecting the liner 130. The punch stop 132 may be made of a material with excellent wear resistance.

[0027] The rotary punch 140 may include a first punch forming surface 141a and a second punch forming surface 141b on its lower side. In the standby state of the rotary punch 140, the first punch forming surface 141a may be formed in a shape that slopes upwards as it gets closer to the liner 130, and the second punch forming surface 141b may be formed in a shape that slopes upwards as it gets further away from the liner 130. The first punch forming surface 141a, together with the first lower die side forming surface 111a, applies pressure to the first bent portion 11a of the sheet metal 10, thereby enabling the first bent portion 11a of the sheet metal 10 to bend at a final angle relative to the center of the sheet metal 10, for example, 90 degrees. The second punch forming surface 141b and the second lower die side forming surface 111b together press the second curved portion 11b of the plate 10, so that when the first curved portion 11a of the plate 10 is bent at 90 degrees relative to the center portion of the plate 10 and the second curved portion 11b of the plate 10 is bent at 90 degrees relative to the first curved portion 11a of the plate 10, the first punch forming surface 141a and the second punch forming surface 141b can be connected to form a 90-degree angle.

[0028] As another example, such as Figure 4 As shown, when the first curved portion 11a of the sheet metal 10 is undercut at an acute angle of less than 90 degrees relative to the center of the sheet metal 10, and the second curved portion 11b of the sheet metal 10 is bent at 90 degrees relative to the first curved portion 11a, the first lower die side forming surface 111a can be inclined inward and downward, and the second lower die side forming surface 111b can be inclined outward and downward. Here, the first punch forming surface 141a and the second punch forming surface 141b face each other at the undercut bending operation position of the rotating punch 140. The lower end of the return pin 171 is closer to the liner 130 eccentrically than the rotation center of the rotating punch 140, so that it is slidably supported by the upper die 120 in a state facing the upper surface of the rotating punch 140. The return pin spring 172 keeps the lower end of the return pin 171 in close contact with the upper surface of the rotating punch 140 by its elastic force. The return pin spring 172 can be made of a compression coil spring. Even if the rotating punch 140 is not configured to return to the standby state due to its own weight, the rotating punch 171 can rotate the rotating punch 140 to the standby state by the elastic force of the rotating punch spring 172. Furthermore, when the rotating punch 140 does not return to the standby state due to its own weight, the return pin 171 and the return pin spring 172 allow the rotating punch 140 to be forced back to the standby state, and the punch holder 150 guides the rotation and lifting operation of the rotating punch 140 while it is fixed to the upper die 120.

[0029] The punch holder 150 can be fixed to the upper die 120 via a holder (not shown). The punch holder 150 moves up and down together with the upper die 120. The punch holder 150 may be formed with a guide hole 151, which guides the rotating shaft 140a of the rotating punch 140 vertically when inserted into it. In the standby position of the rotating punch 140, the guide hole 151 hangs the rotating shaft 140a of the rotating punch 140 on the lower edge, and in the bending operation position of the rotating punch 140, it hangs the rotating shaft 140a of the rotating punch 140 on the upper edge. Therefore, the guide hole 151 can determine the vertical position of the rotating punch 140. When the upper die 120 is lowered while the punch driver 160 is fixed to the upper die 120, it presses the rotating punch 140 from above, causing the rotating punch 140 to rotate. The punch driver 160 is positioned above the rotating punch 140 and is in standby mode. When the upper die 120 descends, the punch driver 160 descends together with the upper die 120 and applies pressure to the rotating punch 140.

[0030] The punch driver 160 has a first pressing portion 161a, a second pressing portion 161b, and a third pressing portion 161c at the portion facing the rotating punch 140. The first pressing portion 161a, the second pressing portion 161b, and the third pressing portion 161c are sequentially connected from the outside to the inside of the upper die 120. The third pressing portion 161c may have a higher horizontal plane than the first pressing portion 161a. The second pressing portion 161b may have an upwardly inclined surface facing the inside of the upper die 120 and may be connected to the first pressing portion 161a and the third pressing portion 161c. The rotating punch 140 may have a first contact portion 142a, a second contact portion 142b, and a third contact portion 142c at the portion facing the punch driver 160. The first contact portion 142a, the second contact portion 142b, and the third contact portion 142c are sequentially connected from the outside to the inside of the upper die 120. The second contact portion 142b forms the same inclined surface as the second pressing portion 161b at the bending operation position of the rotating punch 140, thereby enabling uniform contact. After the rotating punch 140 is rotated while the first pressing portion 161a sequentially presses the first contact portion 142a and the second contact portion 142b, the second pressing portion 161b and the third pressing portion 161c press the second contact portion 142b and the third contact portion 142c to hold the rotating punch 140 in its final rotating state. At this time, in the rotating punch 140, the upper side of the first punch forming surface 141a is in contact with the punch stop portion 132, and the rotating shaft 140a is locked in the lower edge of the guide hole 151 of the punch holder 150 and is ready. In this state, the sheet metal 10 is placed on the upper surface of the lower die 110. Next, as shown in the attached... Figure 5 To be continued Figure 8As shown, when the upper mold 120 and the pad 130 descend together, the pad 130 contacts the central portion of the plate 10 placed on the upper surface of the lower mold 110, and then the plate 10 and the lower mold 110 are pressed and fixed together by the gas spring 131. Next, as... Figure 7 As shown, if the upper die 120 continues to descend, the punch driver 160 causes the rotating punch 140 to rotate. At this time, the rotating punch 140 rotates and rises via the rotating shaft 140, guided by the guide hole 151 of the punch holder 150. Then, the edge of the sheet metal 10 begins to bend, and then, as... Figure 8 As shown, when the upper die 120 descends to a position where it engages with the lower die 110, the rotating punch 140 continues to rotate and rise as it is pressed by the punch driver 160. At this time, the rotating punch 140 rotates and rises until the rotating shaft 140 reaches the upper edge of the guide hole 151 of the punch holder 150. Thus, the edge of the sheet metal 10 is bent by the pressure of the rotating punch 140 and the lower die 110. At this time, the first bent portion 11a of the sheet metal 10 can be bent 90 degrees relative to the center portion of the sheet metal 10. As described above, according to the rotary bending stamping die of this embodiment, the rotating punch 140 can be used to bend the sheet metal 10 by 90 degrees or undercut it without surface damage. Therefore, even if the sheet metal 10 is coated, the problem of coating peeling can be prevented.

[0031] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fender press apparatus characterized by, The device includes an upper die, a lower die, a liner, a pair of rotating punches, an elastic component, and a punch driver. The upper die and the lower die are arranged vertically opposite each other. The liner is installed at the bottom of the upper die via the elastic component. The pair of rotating punches are symmetrically arranged on the left and right sides of the upper die via the punch driver. The punch driver is used to press the rotating punches from above to make them rotate. The outer edges of the left and right sides of the lower die are respectively provided with lower die side forming surfaces. The pair of rotating punches respectively cooperate with the pair of lower die side forming surfaces for bending and forming the edges of the sheet metal.

2. The fender stamping apparatus of claim 1, wherein, It also includes a pair of punch holders, which are symmetrically fixedly installed on the left and right sides of the upper mold. The punch holders are block structures with a rectangular cross-section and have cavities. The rotating punch is rotatably installed in the cavities.

3. A fender stamping apparatus as claimed in claim 1 or 2, characterized in that The lower mold side forming surface includes a first lower mold side forming surface extending downward at the outer edge of the left and right sides of the lower mold and a second lower mold side forming surface extending outward from the bottom end of the first lower mold side forming surface.

4. The fender stamping apparatus of claim 1, wherein, The lower side of the rotary punch includes a first punch forming surface and a second punch forming surface. The first punch forming surface is shaped to be more inclined upwards as it gets closer to the liner, and the second punch forming surface is shaped to be more inclined upwards as it gets further away from the liner.

5. A fender stamping apparatus as defined in claim 4, wherein, The punch driver includes a first pressing part, a second pressing part, and a third pressing part located toward the rotating punch, and the first pressing part, the second pressing part, and the third pressing part are connected to the outer side of the upper mold.

6. A fender stamping apparatus as defined in claim 5, wherein, The top end of the third pressing part is higher than the top end of the first pressing part. The second pressing part has a surface that is inclined upward toward the inside of the upper mold. The second pressing part is connected to the first pressing part and the third pressing part.

7. The fender stamping apparatus of claim 2, wherein, The punch holder has a guide hole, and a rotating shaft is rotatably installed in the guide hole. The rotating punch is fixedly installed on the rotating shaft.

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