Water-drop type two-step mold

Abstract

The utility model discloses a kind of water drop type double-process moulds, including upper die and lower die;The upper surface of the upper die is formed with first forming groove, the bottom surface of the upper die is formed with second forming groove;Reset spring is arranged between the upper die and the lower die;Upper die upper still is provided with pressure head, and the pressure head is coaxially arranged with the first forming groove.The beneficial effects of the utility model are reflected in that: first forming groove and second forming groove are arranged on the upper die, the sheet to be processed and the semi-finished product sheet are placed in the first forming groove and the second forming groove respectively, and the sheet to be processed can be processed into the semi-finished product sheet by using the pressure head stamping, while the semi-finished product sheet is processed into shape;Reduce the number of stations, and then reduce the required floor space and production cost, while reducing the carrying distance, improve work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of mold processing technology, and in particular relates to a teardrop-shaped two-process mold. Background Technology

[0002] Sheet metal parts are widely used in industrial production, and bending is a crucial step in the forming process. Currently, common bending methods primarily utilize a pressure head to press against the workpiece placed on an upper die. The die's action causes plastic deformation of the sheet metal, achieving a bend at a preset angle or radius. However, this method is limited by the die structure and movement, typically only capable of bending at fixed angles or simple arcs. It struggles to process workpieces with complex three-dimensional geometry or specific continuous variable cross-sectional shapes, such as teardrop-shaped structures.

[0003] To fabricate sheet metal bending parts with special shapes such as teardrops, existing technologies often employ progressive die processing. This method involves setting up multiple consecutive stations in the die system, where each station sequentially performs partial stamping or bending on the sheet material. The workpiece is gradually shaped across multiple stations, eventually accumulating to form the desired teardrop shape. Although this method can process complex shapes, it still has significant drawbacks: firstly, the progressive die structure is complex and occupies a large area, resulting in high equipment and maintenance costs; secondly, the workpiece needs to be transferred and positioned sequentially through multiple stations, leading to a long processing flow and unavoidable cumulative positioning errors, which not only affect forming accuracy but also significantly reduce production efficiency.

[0004] Therefore, there is an urgent need to develop a sheet bending forming technology that can balance processing flexibility, equipment compactness, and production efficiency. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned problems in the prior art and to provide a teardrop-shaped two-process mold.

[0006] The objective of this utility model is achieved through the following technical solution: A teardrop-shaped two-stage mold includes an upper mold and a lower mold; a first forming groove is formed on the upper surface of the upper mold, and a second forming groove is formed on the bottom surface of the upper mold; a return spring is provided between the upper mold and the lower mold; a pressure head is also provided above the upper mold, and the pressure head is coaxially arranged with the first forming groove.

[0007] Preferably, the angle between the first bottom surface of the upper mold and its side wall is between 92°±1°; the first bottom surface matches the first top surface of the lower mold, and the angle between the first top surface and the side wall of the lower mold is between 88°±1°.

[0008] Preferably, the bottom of the upper mold has a protrusion protruding from the first bottom surface; the protrusion is located outside the second forming groove; the lower mold has a groove, and the protrusion is located in the groove during use.

[0009] Preferably, both the upper mold and the lower mold are provided with bolts, and the two ends of the return spring are sleeved on the bolts, and the return spring abuts against the bottom surface of the upper mold and the bottom of the groove.

[0010] Preferably, the first forming groove and the second forming groove are V-shaped, and the bottom of both grooves is arc-shaped.

[0011] Preferably, one of the groove walls of the second forming groove is the side wall of the protrusion; the outer wall of the semi-finished sheet abuts against the other groove wall of the second forming groove and the first top surface, and the bent part of the semi-finished sheet is located at the bottom of the second forming groove.

[0012] The advantages of this utility model's technical solution are mainly reflected in: A first forming groove and a second forming groove are set on the upper mold. The sheet to be processed and the semi-finished sheet are placed in the first forming groove and the second forming groove respectively. The sheet to be processed can be processed into a semi-finished sheet by pressing with a press head. At the same time, the semi-finished sheet is formed. This reduces the number of workstations, thereby reducing the required floor space and production costs, while also reducing the handling distance and improving work efficiency. The first bottom surface of the upper mold is tilted downwards so that the angle between it and the side wall of the upper mold is greater than 90°, which provides a certain springback space for the formed sheet, making the formed sheet more in line with production requirements and improving processing quality. The upper mold is driven to move upward by a return spring, which separates the upper mold from the lower mold and provides space for the semi-finished sheet material; this makes the operation process smoother and further improves work efficiency. Attached Figure Description

[0013] Figure 1 : A structural diagram of the preferred embodiment of this utility model in the state before processing; Figure 2 : A structural diagram of the processing and forming state of a preferred embodiment of this utility model. Detailed Implementation

[0014] The purpose, advantages, and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of applying the technical solutions of this utility model, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this utility model.

[0015] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the solution, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0016] This utility model discloses a teardrop-shaped two-stage mold, including as follows: Figure 1 The upper die 1 and lower die 2 are shown. Further, the bottom of the upper die 1 has a protrusion 12 protruding from the first bottom surface 11; the lower die 2 has a groove 22 formed therein, and the protrusion 12 is located within the groove 22 during use. The protrusion 12 serves as a guide during use, effectively preventing movement and misalignment during stamping and improving the yield rate.

[0017] Specifically, such as Figure 1 or Figure 2 As shown, the upper surface of the upper mold 1 has a first forming groove 101 for preventing the sheet material to be processed, and the bottom surface of the upper mold 1 has a second forming groove 102 for the semi-finished sheet material. Furthermore, the first forming groove 101 and the second forming groove 102 are V-shaped, and the bottom of both grooves is arc-shaped.

[0018] Furthermore, one of the walls of the second forming groove 102 is the side wall of the protrusion 12, that is, the protrusion 12 is located on the outside of the second forming groove 102. Figure 2 As shown, the outer wall of the semi-finished sheet abuts against another wall of the second forming groove 102 and the first top surface 21, and the bent part of the semi-finished sheet is located at the bottom of the second forming groove 102.

[0019] like Figure 1 and Figure 2 As shown, the angle between the first bottom surface 11 of the upper mold 1 and its side wall is between 92° and 1°. The first bottom surface 11 matches the first top surface 21 on the lower mold 2, and the angle between the first top surface 21 and the side wall of the lower mold 2 is between 88° and 1°. The first bottom surface of the upper mold is tilted downwards, so that the angle between it and the side wall of the upper mold is greater than 90°, providing a certain amount of springback space for the formed sheet, making the formed sheet more in line with production requirements and improving processing quality.

[0020] A return spring 3 is provided between the upper mold 1 and the lower mold 2. Bolts 31 are provided on both the upper mold 1 and the lower mold 2. The two ends of the return spring 3 are sleeved on the bolts 31, and the return spring 3 abuts against the bottom surface of the upper mold 1 and the bottom of the groove 22. The return spring drives the upper mold to move upward, separating the upper mold from the lower mold and providing space for the semi-finished sheet material; this makes the operation process smoother and further improves work efficiency.

[0021] A pressure head 4 is also provided above the upper mold 1, and the pressure head 4 is coaxially arranged with the first forming groove 101. The pressure head 4 is connected to a linear drive mechanism, which includes known structures such as hydraulic cylinders and air cylinders that have linear drive functions. Since the structure of the linear drive mechanism is known, it will not be described in detail here.

[0022] In this invention, a first forming groove and a second forming groove are provided on the upper mold. The sheet to be processed and the semi-finished sheet are placed in the first and second forming grooves respectively. The sheet is then pressed by a pressure head to process it into a semi-finished sheet, and the semi-finished sheet is simultaneously formed. This reduces the number of workstations, thereby reducing the required floor space and production costs, while also reducing transport distances and improving work efficiency. Specifically, the sheet to be processed is placed on the top surface of the upper mold 1, and the pressure head 4 is activated to bend the sheet into the first forming groove 101, forming a semi-finished sheet; the pressure head 4 then retracts. The semi-finished sheet is then removed from the first forming groove 101 and placed on the first top surface 21 of the lower mold 2, while the next sheet to be processed is placed on the top surface of the upper mold 1. The pressure head 4 is activated again to process the semi-finished sheet in the second forming groove 102, and the next sheet to be processed is processed into a semi-finished sheet; this process is repeated. Furthermore, the sheet-like material described in this utility model includes, but is not limited to, sheet metal parts, and sheet metal parts are preferred in this utility model.

[0023] This utility model has many other embodiments. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A teardrop-shaped two-stage mold, comprising an upper mold (1) and a lower mold (2); characterized in that: The upper surface of the upper mold (1) is formed with a first forming groove (101), and the bottom surface of the upper mold (1) is formed with a second forming groove (102); a return spring (3) is provided between the upper mold (1) and the lower mold (2); a pressure head (4) is also provided above the upper mold (1), and the pressure head (4) is coaxially arranged with the first forming groove (101).

2. The teardrop-shaped dual-process mold according to claim 1, characterized in that: The angle between the first bottom surface (11) of the upper mold (1) and its side wall is between 92°±1°; the first bottom surface (11) matches the first top surface (21) on the lower mold (2), and the angle between the first top surface (21) and the side wall of the lower mold (2) is between 88°±1°.

3. The teardrop-shaped dual-process mold according to claim 2, characterized in that: The bottom of the upper mold (1) has a protrusion (12) protruding from the first bottom surface (11); the protrusion (12) is located outside the second forming groove (102); the lower mold (2) has a groove (22) formed on it, and the protrusion (12) is located in the groove (22) when in use.

4. The teardrop-shaped two-stage mold according to claim 3, characterized in that: Bolts (31) are provided on both the upper mold (1) and the lower mold (2). The two ends of the return spring (3) are sleeved on the bolts (31), and the return spring (3) abuts against the bottom surface of the upper mold (1) and the bottom of the groove (22).

5. The teardrop-shaped two-stage mold according to claim 1, characterized in that: The first forming groove (101) and the second forming groove (102) are V-shaped, and the bottom of both grooves is arc-shaped.

6. The teardrop-shaped two-stage mold according to claim 3, characterized in that: One of the groove walls of the second forming groove (102) is the side wall of the protrusion (12); the outer wall of the semi-finished sheet abuts against the other groove wall of the second forming groove (102) and the first top surface (21), and the bent part of the semi-finished sheet is located at the bottom of the second forming groove (102).

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