Pre-bending die

Abstract

The utility model discloses a pre-bending die which comprises two upper die plates, two lower die plates, a material pressing plate and a nitrogen spring, one upper die plate is located above one lower die plate, a first machining cavity position exists between the two lower die plates, the material pressing plate is located in the first machining cavity position, and the nitrogen spring is located under the material pressing plate. The driving end of the nitrogen spring is vertically upwards connected with the lower end of the material pressing plate, and the material pressing plate moves between the upper die plate and the lower die plate in the vertical direction. According to the pre-bending die, under the condition that the die is crowded, the structure of lateral pushing and sliding block walking is not needed, the pre-bending die is suitable for bending and forming products on automobile parts, the process forming procedure is omitted, and the manufacturing cost of the die is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a pre-bending mold. Background Art

[0002] Most of the automotive parts are formed by molds, especially "Z-type" bent parts and "W-type" bent parts. In the process of crowded molds, side pushing and sliding blocks are conventionally used for bending. This processing adds process steps, increases the manufacturing cost of the mold, and affects the production process. Utility Model Content

[0003] One purpose of the utility model is to provide a pre-bent mold, which can save processing and forming procedures and reduce the cost of mold production.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A pre-bending mold comprises two upper templates, two lower templates, a pressure plate and a nitrogen spring. One of the upper templates is located above one of the lower templates. There is a first processing cavity between the two lower templates. The pressure plate is in the first processing cavity. The nitrogen spring is located directly below the pressure plate. The driving end of the nitrogen spring is vertically connected to the lower end of the pressure plate. The pressure plate moves between the upper template and the lower template along the vertical direction.

[0006] As a preferred technical solution, a guide post is fixed to the lower end of the pressing plate, a guide sleeve is arranged on the outer side of the guide post, and the guide post is slidably connected along the guide sleeve.

[0007] As a preferred technical solution, a spring mounting plate is fixed to the outer side of the fixed end of the nitrogen spring, and a connecting hole for fixed installation is provided on the edge of the spring mounting plate.

[0008] As a preferred technical solution, there is a second processing cavity between the two upper templates, and a cushion block is arranged in the second processing cavity, and the cushion block is located above the pressing plate.

[0009] As a preferred technical solution, a conical guide pin for product positioning is installed at the lower end of the cushion block, and a guide hole is provided on the pressing plate. The conical guide pin passes through the product and is inserted into the guide hole.

[0010] The beneficial effects of the utility model are: providing a pre-bending mold, which does not need to adopt a side push and sliding block structure in the case of a crowded mold, is suitable for bending and forming products on automotive parts, saves process forming procedures, and further reduces the manufacturing cost of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described in detail below based on the drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the first overall structure of a pre-bending mold described in an embodiment;

[0013] Figure 2 A second overall structural schematic diagram of a pre-bending mold according to an embodiment;

[0014] Figure 3 A cross-sectional view of a pre-bent mold according to an embodiment;

[0015] Figure 4 A cross-sectional view of a pre-bending mold described in an embodiment.

[0016] Figures 1 to 4 middle:

[0017] 1. Upper template; 2. Lower template; 3. Pressing plate; 4. Nitrogen spring; 5. Guide pin; 6. Guide sleeve; 7. Spring mounting plate; 8. Spacer; 9. Conical guide pin; 10. Guide hole; 11. Product. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0019] like Figures 1 to 4 As shown, in this embodiment, a pre-bending mold includes two upper templates 1, two lower templates 2, a pressure plate 3 and a nitrogen spring 4. An upper template 1 is located above a lower template 2. There is a first processing cavity between the two lower templates 2. The pressure plate 3 is in the first processing cavity. The nitrogen spring 4 is located directly below the pressure plate 3. The driving end of the nitrogen spring 4 is vertically connected to the lower end of the pressure plate 3, and the pressure plate 3 moves between the upper template 1 and the lower template 2 along the vertical direction.

[0020] During the processing, the upper template 1 and the lower template 2 are closed, and the strip surface clamped between the upper template 1 and the lower template 2 is pre-bent upward. Then the nitrogen spring 4 controls the pressing plate 3 to move upward, and the middle part of the strip surface is also bent. After other process structures are formed, the strip surface is finally pressed back to the initial state and cut off.

[0021] A guide column 5 is fixed at the lower end of the pressing plate 3, and a guide sleeve 6 is arranged on the outer side of the guide column 5. The guide column 5 is slidably connected along the guide sleeve 6. When the nitrogen spring 4 controls the pressing plate 3 to move up and down, the guide column 5 assists the movement of the pressing plate 3. The guide sleeve 6 and the nitrogen spring 4 are fixed at the same position, so that the guide column 5 and the driving end of the nitrogen spring 4 can move up and down synchronously.

[0022] A spring mounting plate 7 is fixed to the outside of the fixed end of the nitrogen spring 4, and a connecting hole for fixed installation is provided on the edge of the spring mounting plate 7. The nitrogen spring 4 is fixed to the mold by means of the spring mounting plate 7, and can be fixed by screws, bolts or other fixing structures through the connecting hole.

[0023] There is a second processing cavity between the two upper templates 1, and a pad 8 is arranged in the second processing cavity. The pad 8 is located above the pressing plate 3, and the pad 8 supports the upper middle part of the product 11. When the pressing plate 3 bends the product 11 upward, the pad 8 keeps the middle part of the product 11 flat.

[0024] A conical guide pin 9 for positioning the product 11 is installed at the lower end of the cushion block 8, and a guide hole 10 is provided on the pressing plate 3. The conical guide pin 9 passes through the product 11 and is inserted into the guide hole 10. The conical guide pin 9 on the cushion block 8 passes through the positioning hole of the product 11 and is then inserted into the guide hole 10 of the pressing plate 3, so that the product 11 is fixed between the upper template 1 and the lower template 2.

[0025] It should be stated that the above-mentioned specific implementation methods are only preferred embodiments of the present utility model and the technical principles used. Within the technical scope disclosed by the present utility model, any changes or substitutions that can be easily thought of by technicians familiar with this technical field should be included in the protection scope of the present utility model.

Claims

1. A pre-bending mold, characterized in that: It includes two upper templates, two lower templates, a pressure plate and a nitrogen spring. One of the upper templates is located above one of the lower templates. There is a first processing cavity between the two lower templates. The pressure plate is in the first processing cavity. The nitrogen spring is located directly below the pressure plate. The driving end of the nitrogen spring is vertically connected to the lower end of the pressure plate. The pressure plate moves between the upper template and the lower template along the vertical direction.

2. A pre-bending mold according to claim 1, characterized in that: A guide post is fixed to the lower end of the pressing plate, a guide sleeve is arranged on the outer side of the guide post, and the guide post is slidably connected along the guide sleeve.

3. A pre-bending mold according to claim 1, characterized in that: A spring mounting plate is fixed to the outer side of the fixed end of the nitrogen spring, and a connecting hole for fixed installation is arranged at the edge of the spring mounting plate.

4. A pre-bending mold according to claim 1, characterized in that: There is a second processing cavity between the two upper templates, and a cushion block is arranged in the second processing cavity, and the cushion block is located above the pressing plate.

5. A pre-bending mold according to claim 4, characterized in that: A conical guide pin for positioning the product is installed at the lower end of the cushion block, and a guide hole is provided on the pressing plate. The conical guide pin passes through the product and is inserted into the guide hole.

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