A convexity punching die

Abstract

The utility model relates to the technical field of shell processing, disclose a convex hull punch -out die, including mutually cooperate's upper die holder and lower die holder, the upper die holder includes the die block, the middle position of die block lower surface forms has the first contact surface, the first contact surface is the cambered surface and presents the concave shape, the lower die holder includes the die block, the module includes the main part and is located the pressure block above the main part, the top surface of pressure block is the second contact surface, the central position of first contact surface top forms has the first compensation surface, the central position of second contact surface top forms has the second compensation surface, through setting first compensation surface and the second compensation surface, the local area of convex hull both sides is limited, makes the deformation of convex hull both sides under the action of external force to the inside, to offset the external force in the stamping process, reduce the deformation of convex hull both sides, avoid shell out the out of round phenomenon, guarantee the processing quality and assembly accuracy of shell.

Description

Technical Field

[0001] This utility model belongs to the field of shell processing technology, specifically relating to a convex hull stamping die. Background Technology

[0002] Typically, an engine rotor housing has a protrusion that contacts the stator trigger as the rotor rotates, thereby generating current and an ignition signal.

[0003] In the existing technology, special molds are usually used to stamp the shell to form the convex bulge. However, the following technical problems often exist: 1. The two sides of the convex bulge will also deform under the impact force, causing the shell to become out of round, which affects the processing quality and reduces the assembly accuracy of the shell; 2. For different models of shells, especially when the diameter is different, it is necessary to change the corresponding mold to stamp the convex bulge, which is cumbersome and has low work efficiency. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a convex hull stamping die to solve the technical problem in the prior art where deformation on both sides of the convex hull causes the overall shell to become out of round.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A convex stamping die includes an upper die base and a lower die base that cooperate with each other. The upper die base includes a concave module. A first contact surface is formed at the middle position of the lower surface of the concave module. The first contact surface is an arc surface and is concave. The lower die base includes a concave module. The module includes a main body and a pressure block located above the main body. The main body and the pressure block are detachably connected. The top surface of the pressure block is a second contact surface. The second contact surface is an arc surface and is convex. A first limiting hole is formed at the center position of the top of the first contact surface. A second limiting hole is formed at the center position of the top of the second contact surface. A punch is provided in the second limiting hole. A first compensation surface is formed at the center position of the top of the first contact surface. The curvature of the first compensation surface is less than the curvature of the first contact surface. A second compensation surface is formed at the center position of the top of the second contact surface. The curvature of the second compensation surface is less than the curvature of the second contact surface.

[0007] Furthermore, both the upper mold base and the lower mold base are located on the base plate. The upper mold base includes a top plate located above the lower mold base. The top plate and the base plate are connected by a lifting rod. A recessed module is provided on the lower surface of the top plate away from the lifting rod. The recessed module is in the shape of a cuboid.

[0008] Furthermore, the lower mold base includes a vertical plate located above the base plate and in a vertical direction. The horizontal extension direction of the vertical plate is parallel to the horizontal extension direction of the concave module. A convex module is provided on the vertical side of the vertical plate away from the lifting rod, and the convex module is located directly below the concave module.

[0009] Furthermore, the longitudinal section of the main body is a superior arc shape, while the longitudinal section of the pressure-bearing block is a inferior arc shape;

[0010] Furthermore, the first limiting hole extends vertically upward and completely penetrates the recessed module, while the second limiting hole extends vertically downward until it reaches the interior of the main body. The first limiting hole and the second limiting hole are directly opposite each other, and their cross-sectional dimensions are the same.

[0011] Furthermore, the vertical distance between the vertex of the first compensation surface and the virtual vertex of the first contact surface is 0.2mm, and the first compensation surface is achieved by filling at the center position of the first contact surface; the vertical distance between the vertex of the second compensation surface and the virtual vertex of the second contact surface is 0.2mm, and the second compensation surface is achieved by wire cutting at the center position of the second contact surface.

[0012] The beneficial effects of this utility model are as follows:

[0013] Compared with the existing technology, by setting the first compensation surface and the second compensation surface, the local areas on both sides of the convex hull are limited, so that the two sides of the convex hull deform inward under the action of external force, thereby offsetting the outward force during the stamping process, reducing the amount of deformation on both sides of the convex hull, avoiding the phenomenon of the shell going out of round, and ensuring the processing quality and assembly accuracy of the shell. Attached Figure Description

[0014] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0015] Figure 1 This is a schematic diagram of the overall convex bulge stamping die in Embodiment 1 of this utility model;

[0016] Figure 2 This is a cross-sectional view of the convex stamping die in Embodiment 1 of this utility model;

[0017] Figure 3 This is a front view of the concave module in Embodiment 1 of this utility model;

[0018] Figure 4 for Figure 3 Enlarged view at point A1;

[0019] Figure 5 This is a front view of the pressure-bearing block in Embodiment 1 of this utility model;

[0020] Figure 6 for Figure 5 Enlarged view of section A2 in the middle.

[0021] The following labels are shown in the attached diagram:

[0022] Upper mold base 1, top plate 101, lifting rod 102, concave module 103, first compensation surface 104, first limiting hole 105, lower mold base 2, upright plate 201, reinforcing rib 202, convex module 203, main body 204, limiting groove 205, pressure block 206, limiting protrusion 207, second compensation surface 208, second limiting hole 209, punch 210, base plate 3. Detailed Implementation

[0023] Example 1, specifically as follows Figures 1-6 As shown.

[0024] A punching die for a convex shape includes an upper die holder 1 and a lower die holder 2 that cooperate with each other.

[0025] like Figure 1 As shown, both the upper mold base 1 and the lower mold base 2 are located on the base plate 3. The upper mold base 1 includes a top plate 101 located above the lower mold base 2. The top plate 101 is horizontal. The top plate 101 and the base plate 3 are connected by a lifting rod 102. In this embodiment, two lifting rods 102 are provided and located on the same side of the top plate 101. The two ends of the lifting rod 102 are welded and fixed to the upper surface of the base plate 3 and the lower surface of the top plate 101, respectively. The lifting rod 102 adopts an electro-hydraulic lifting rod, which is the prior art and will not be described in detail here.

[0026] A recessed module 103 is provided on the side of the lower surface of the top plate 101 away from the lifting rod 102. The recessed module 103 is fixedly connected to the top plate 101 by bolts. The recessed module 103 is generally rectangular, and a first contact surface is formed at the middle position of its lower surface. The first contact surface is an arc surface and is concave.

[0027] The lower mold base 2 includes a vertical plate 201 situated above the base plate 3. The horizontal extension direction of the vertical plate 201 is parallel to the horizontal extension direction of the recessed module 103. The vertical plate 201 and the base plate 3 are fixedly connected by welding. A protruding module 203 is provided on the vertical side of the vertical plate 201 away from the lifting rod 102. The protruding module 203 is located directly below the recessed module 103 and is fixed to the vertical plate 201 by bolts. During use, the protruding module 203 and the vertical plate 201 will be subjected to a large external force. In severe cases, the vertical plate 201 may tip over towards the protruding module 203, causing damage to the mold. Therefore, in this embodiment, a triangular reinforcing rib 202 is provided on the outer surface of the vertical plate 201 away from the lifting rod 102. The reinforcing rib 202 is located on both sides of the protruding module 203, and supports the vertical plate 201 to prevent it from tipping over.

[0028] The recessed module 103 includes a main body 204 and a pressure block 206 located above the main body 204. The longitudinal section of the main body 204 is in the shape of a superior arc, and the longitudinal section of the pressure block 206 is in the shape of a inferior arc. The main body 204 and the pressure block 206 are detachably connected, and the pressure block 206 can be replaced with a matching one according to the different sizes of the shell.

[0029] Specifically, a limiting groove 205 is formed on the horizontal top surface of the main body 204, and a limiting protrusion 207 matching the limiting groove 205 is provided on the horizontal bottom surface of the pressure block 206. The pressure block 206 and the limiting protrusion 207 are integrally formed, and the limiting protrusion 207 is inserted into the limiting groove 205 and further reinforced by screws. It is necessary to further explain that the top surface of the pressure block 206 is the second contact surface, which is an arc surface and convex upward, and the first contact surface is adapted to the second contact surface.

[0030] A square first limiting hole 105 is provided at the center of the top of the first contact surface. The first limiting hole 105 extends vertically upward and completely penetrates the recessed module 103. Similarly, a square second limiting hole 209 is provided at the center of the top of the second contact surface. The second limiting hole 209 extends vertically downward into the interior of the main body 204. It is worth emphasizing that the first limiting hole 105 and the second limiting hole 209 are directly opposite each other, and their cross-sectional dimensions are the same.

[0031] A cuboid punch 210 is provided inside the second limiting hole 209. The punch 210 is located inside the main body 204. The cross-sectional dimensions of the punch 210 are the same as those of the second limiting hole 209. Under hydraulic drive, the punch 210 can move in the vertical direction.

[0032] In use, firstly, select and install a convex module 203 that matches the size of the housing, and then fit the housing onto the arc surface of the convex module 203. Drive the top plate 101 and the concave module 103 to descend by the lifting rod 102, so that the first contact surface contacts and presses against the housing. Then, open the punch 210 to make it rise. The punch 210 makes partial contact with the side wall of the housing and pushes out and deforms toward the first limiting hole 105 to form a convex bulge.

[0033] However, in actual production, the two sides of the convex hull will also deform under the impact force, causing the shell to become out of round, which affects the processing quality and reduces the assembly accuracy of the shell.

[0034] Therefore, a compensation mechanism is needed to prevent deformation on both sides of the convex hull. Specifically, a first compensation surface 104 is formed at the center of the top of the first contact surface, and a first limiting hole 105 is located within the first compensation surface 104. The curvature of the first compensation surface 104 is less than the curvature of the first contact surface, that is, the first compensation surface 104 is located below the first contact surface. The vertical distance between the vertex of the first compensation surface 104 and the virtual vertex of the first contact surface is 0.2 mm. The first compensation surface 104 is achieved by filling the center of the first contact surface.

[0035] Similarly, a second compensation surface 208 is formed at the center of the top of the second contact surface, and a second limiting hole 209 is located inside the second compensation surface 208. The curvature of the second compensation surface 208 is less than the curvature of the second contact surface, that is, the second compensation surface 208 is located below the second contact surface. The vertical distance between the vertex of the second compensation surface 208 and the virtual vertex of the second contact surface is 0.2 mm. The second compensation surface 208 is achieved by wire cutting at the center of the second contact surface.

[0036] By setting the first compensation surface 104 and the second compensation surface 208, the local areas on both sides of the convex hull are limited, so that the two sides of the convex hull deform inward under the action of external force, thereby offsetting the outward force during the stamping process, reducing the amount of deformation on both sides of the convex hull, avoiding the phenomenon of the shell going out of round, and ensuring the processing quality and assembly accuracy of the shell.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A punching die for a convex bulge, characterized in that, The device includes an upper mold base and a lower mold base that cooperate with each other. The upper mold base includes a concave module. A first contact surface is formed at the middle position of the lower surface of the concave module. The first contact surface is an arc surface and is concave. The lower mold base includes a concave module. The module includes a main body and a pressure block located above the main body. The main body and the pressure block are detachably connected. The top surface of the pressure block is a second contact surface. The second contact surface is an arc surface and is convex. A first limiting hole is formed at the center position of the top of the first contact surface. A second limiting hole is formed at the center position of the top of the second contact surface. A punch is provided in the second limiting hole. A first compensation surface is formed at the center position of the top of the first contact surface. The curvature of the first compensation surface is less than the curvature of the first contact surface. A second compensation surface is formed at the center position of the top of the second contact surface. The curvature of the second compensation surface is less than the curvature of the second contact surface.

2. The convex stamping die according to claim 1, characterized in that, Both the upper mold base and the lower mold base are located on the base plate. The upper mold base includes a top plate located above the lower mold base. The top plate and the base plate are connected by a lifting rod. A recessed module is provided on the lower surface of the top plate away from the lifting rod. The recessed module is in the shape of a cuboid.

3. The convex stamping die according to claim 2, characterized in that, The lower mold base includes a vertical plate located above the base plate. The horizontal extension direction of the vertical plate is parallel to the horizontal extension direction of the concave module. A convex module is provided on the vertical side of the vertical plate away from the lifting rod, and the convex module is located directly below the concave module.

4. The convex stamping die according to claim 3, characterized in that, The longitudinal section of the main body is in the shape of a superior arc, while the longitudinal section of the bearing block is in the shape of a inferior arc.

5. The convex stamping die according to claim 4, characterized in that, The first limiting hole extends vertically upward and completely penetrates the recessed module, while the second limiting hole extends vertically downward until it reaches the interior of the main body. The first limiting hole and the second limiting hole are directly opposite each other, and their cross-sectional dimensions are the same.

6. The convex stamping die according to claim 5, characterized in that, The vertical distance between the vertex of the first compensation surface and the virtual vertex of the first contact surface is 0.2 mm, and the first compensation surface is achieved by filling at the center position of the first contact surface; the vertical distance between the vertex of the second compensation surface and the virtual vertex of the second contact surface is 0.2 mm, and the second compensation surface is achieved by wire cutting at the center position of the second contact surface.

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