A high draw ratio mold for thin-walled automotive parts

Abstract

This utility model provides a high draw ratio mold for thin-walled automotive parts, belonging to the field of automotive parts processing technology. It solves the problems of inconvenient processing of existing thin-walled automotive parts. This high draw ratio mold for thin-walled automotive parts includes a mold frame, a punch, and an ejector pin. A lower mold cavity is embedded through the center of the inner wall of the mold frame. A placement groove is formed at the center of the top of the lower mold cavity. A ejector hole is formed at the bottom of the inner wall of the placement groove, and a rounded corner for the die inlet is formed at the top of the inner wall of the placement groove. The placement groove works in conjunction with the punch, and the ejector hole works in conjunction with the ejector pin. Coolant inflow holes are formed sequentially from top to bottom on one side of the mold frame, and coolant outflow holes are formed sequentially from top to bottom on the other side of the mold frame. Several annular flow cavities connect the coolant inflow holes and the coolant outflow holes. This utility model has the advantages of high processing efficiency and high processing precision.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts processing technology, and relates to a mold, particularly a high draw ratio mold for thin-walled automotive parts. Background Technology

[0002] Thin-walled automotive parts are a type of critical component in automobile manufacturing that features a thin-walled structure (typically with a wall thickness ≤ 1.5mm). Their design, materials, and manufacturing processes must meet the requirements of lightweighting, high strength, and precision molding.

[0003] Traditional cold stamping processes often result in excessive excess material, necessitating further machining. This leads to inconsistent dimensional accuracy, low efficiency, and high costs. Therefore, to address these issues, we propose a high draw ratio mold for thin-walled automotive parts. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a high draw ratio mold for automotive thin-walled parts that can stamp thin-walled workpieces into place in one step without further machining.

[0005] The objective of this utility model can be achieved through the following technical solution: A high draw ratio mold for thin-walled automotive parts includes a mold frame, a punch, and an ejector pin. A lower mold cavity is embedded through the center of the inner wall of the mold frame. A placement groove is formed at the center of the top of the lower mold cavity. An ejector hole is formed at the bottom of the inner wall of the placement groove. A rounded corner for the die inlet is formed at the top of the inner wall of the placement groove. The placement groove is used in conjunction with the punch. The ejector hole is used in conjunction with the ejector pin. Coolant inflow holes are formed sequentially from top to bottom on one side of the mold frame. Coolant outflow holes are formed sequentially from top to bottom on the other side of the mold frame. Several annular flow cavities are connected between the coolant inflow holes and the coolant outflow holes.

[0006] This high draw ratio mold for thin-walled automotive parts, through the coordinated use of the mold frame, ejector hole, lower mold cavity, placement groove, die entrance fillet, punch, and ejector pin, can stamp thin-walled workpieces in one pass without further machining. This avoids the low stamping efficiency of traditional multi-pass stamping, while producing thin-walled workpieces with high and stable dimensional accuracy, solving the problem of unstable dimensions in traditional stamping.

[0007] In the aforementioned high draw ratio mold for thin-walled automotive parts, both the punch and the lower die cavity are made of tungsten steel, and the bottom of the ejector hole penetrates the lower die cavity. The ejector hole facilitates the raising and lowering of the ejector pin.

[0008] In the aforementioned high draw ratio mold for thin-walled automotive parts, quick connectors are embedded on the opposite sides of the inner walls of the coolant inlet and outlet holes. These quick connectors facilitate the connection between the coolant inlet and outlet holes, allowing for easy connection between external coolant inlet pipes and coolant outlet pipes.

[0009] In the aforementioned high draw ratio mold for thin-walled automotive parts, the inner wall of the placement groove is provided with several storage holes, and the inner wall of each storage hole is inlaid with microcapsule lubricant. The microcapsule lubricant can be stored and collected through these storage holes.

[0010] In the aforementioned high draw ratio mold for thin-walled automotive parts, the inner wall of the receiving hole near the placement groove is filled with nano-silver paste. The nano-silver paste allows for the directional release of microcapsule lubricant, thereby lubricating the punch and the inner wall of the placement groove.

[0011] Compared with existing technologies, this high draw ratio mold for thin-walled automotive parts, through the coordinated use of the mold frame, ejector hole, lower mold cavity, placement groove, die entrance fillet, punch, and ejector pin, can stamp thin-walled workpieces in one pass without further machining. This avoids the low stamping efficiency of traditional multi-pass stamping, while producing thin-walled workpieces with high and stable dimensional accuracy, solving the problem of unstable dimensions in traditional stamping. Attached Figure Description

[0012] Figure 1 This is a system structure block diagram of this utility model.

[0013] Figure 2 This is a top view of the outer frame of the mold frame of this utility model.

[0014] Figure 3 This is a schematic diagram of the punch structure of this utility model.

[0015] Figure 4 This is a utility model Figure 3 Top view.

[0016] Figure 5 This is a schematic diagram of the top rod structure of this utility model.

[0017] Figure 6 This is a utility model Figure 1 A magnified view of A in the middle.

[0018] In the diagram: 1. Mold frame; 2. Coolant inlet hole; 3. Quick connector; 4. Annular flow cavity; 5. Ejector hole; 6. Coolant outlet hole; 7. Lower mold cavity; 8. Placement groove; 9. Die entrance fillet; 10. Punch; 11. Ejector pin; 12. Storage hole; 13. Microcapsule lubricant; 14. Nano silver paste. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the high draw ratio mold for thin-walled automotive parts includes a mold frame 1, a punch 10, and an ejector pin 11. A lower mold cavity 7 is embedded through the center of the inner wall of the mold frame 1. A placement groove 8 is provided at the center of the top of the lower mold cavity 7. An ejector hole 5 is provided at the bottom of the inner wall of the placement groove 8. A die inlet fillet 9 is provided at the top of the inner wall of the placement groove 8. The placement groove 8 is used in conjunction with the punch 10, and the ejector hole 5 is used in conjunction with the ejector pin 11. Coolant inlet holes 2 are provided sequentially from top to bottom on one side of the mold frame 1, and coolant outlet holes 6 are provided sequentially from top to bottom on the other side of the mold frame 1. Several annular flow cavities 4 are connected between the coolant inlet holes 2 and the coolant outlet holes 6.

[0021] To elaborate further, both the punch 10 and the lower die cavity 7 are made of tungsten steel, and the bottom of the ejector hole 5 penetrates through the lower die cavity 7. Quick connectors 3 are embedded on the opposite sides of the inner walls of the coolant inlet hole 2 and the coolant outlet hole 6.

[0022] The inner wall of the placement groove 8 has several storage holes 12, and the inner wall of the storage holes 12 is inlaid with microcapsule lubricant 13. The side of the inner wall of the storage hole 12 near the placement groove 8 is filled with nano silver paste 14.

[0023] In use, the punch 10 and the outer frame 1 of the mold base are both installed at specific positions on the hydraulic press. The operator takes the stamping blank and places it into the placement groove 8, starts the hydraulic press, and the punch 10 moves down to stamp the blank in the placement groove 8. After stamping is completed, the ejector rod 11 moves up to push the workpiece out, and the worker takes the workpiece away. This application can stamp the workpiece in one go without further machining, avoiding the problem of low stamping efficiency in traditional multi-pass stamping; furthermore, the workpiece processed by this application has high and stable dimensional accuracy, solving the problem of unstable dimensions of traditional stamped workpieces. It should be noted that during the stamping process, the microcapsule lubricant 13 is released through the nano silver paste 14 to provide lubrication between the punch 10 and the placement groove 8, avoiding dry friction between the two and the formation of burrs; during the further stamping process, the external coolant inlet pipe is connected to the quick connector 3 at the coolant inlet hole 2, and the external coolant outlet pipe is connected to the quick connector 3 at the coolant outlet hole 6, so that the external coolant provides a continuous supply of cooling water to the outer frame 1 of the mold base, avoiding large deformation of the outer frame 1 of the mold base and the lower mold cavity 7 due to excessive temperature changes.

[0024] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A high draw ratio mold for thin-walled automotive parts, comprising a mold frame (1), a punch (10), and an ejector pin (11), characterized in that: The lower mold cavity (7) is embedded through the center of the inner wall of the outer frame (1) of the mold frame. The lower mold cavity (7) has a placement groove (8) at the center of the top. The bottom of the inner wall of the placement groove (8) has a top material hole (5). The top of the inner wall of the placement groove (8) has a die inlet rounded corner (9). The placement groove (8) is used in conjunction with the punch (10). The top material hole (5) is used in conjunction with the ejector rod (11). Coolant inlet holes (2) are opened sequentially from top to bottom on one side of the outer frame (1) of the mold frame. Coolant outlet holes (6) are opened sequentially from top to bottom on the other side of the outer frame (1). Several annular flow cavities (4) are connected between the coolant inlet holes (2) and the coolant outlet holes (6).

2. A high stretch ratio die for a thin-walled automotive part according to claim 1, wherein: The punch (10) and the lower die cavity (7) are both made of tungsten steel, and the bottom of the ejector hole (5) penetrates the lower die cavity (7).

3. A high stretch ratio die for a thin-walled automotive part according to claim 1, wherein: Quick connectors (3) are embedded on the opposite sides of the inner walls of the coolant inlet hole (2) and coolant outlet hole (6).

4. A high stretch ratio die for a thin-walled automotive part according to claim 1, wherein: The inner wall of the placement groove (8) is provided with a number of storage holes (12), and the inner wall of the storage holes (12) is inlaid with microcapsule lubricant (13).

5. A high stretch ratio die for a thin-walled automotive part according to claim 4, wherein: The inner wall of the storage hole (12) near the placement groove (8) is filled with nano silver paste (14).

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