An in-die lubrication mold structure for aluminum stamping

Abstract

This utility model proposes an in-die lubrication mold structure for aluminum stamping, including an upper die assembly, a lower die assembly, a blank holder assembly, and an oil supply assembly. The upper and lower die assemblies are positioned opposite each other to achieve precise stamping. The blank holder assembly is mounted on the upper die assembly and moves up and down with it, stabilizing and pressing the aluminum material before stamping to prevent positional displacement. The oil supply assembly continuously supplies oil to the blank holder assembly, forming a stable lubricating oil film in the stamping area, reducing aluminum chip generation, preventing chip adhesion, and significantly improving product surface quality. The overall structure is simple and reliable, effectively extending mold life and meeting the lightweight, high-quality stamping requirements of new energy vehicles.

Description

Technical Field

[0001] This utility model relates to the field of punching die technology, and more specifically, to an in-die oil-lubricated die structure for aluminum stamping. Background Technology

[0002] With the rapid development and popularization of new energy vehicles, vehicle lightweighting has become one of the important technological development directions in the automotive manufacturing field. Lightweighting refers to reducing the weight of the vehicle body by optimizing structural design and selecting lightweight materials, thereby improving the energy efficiency of new energy vehicles, extending their driving range, and reducing carbon emissions. Currently, one of the main ways to achieve vehicle lightweighting is to replace traditional steel with lightweight materials such as aluminum alloys to effectively reduce the overall vehicle weight.

[0003] However, during the stamping process, aluminum alloys, due to their high ductility and relatively low hardness, are prone to generating a large amount of aluminum chips. These aluminum chips easily adhere to the die cutting edges and punch surfaces during processing, causing die blockage and scratches and indentations on the product surface, seriously affecting the appearance quality and dimensional accuracy of the product, and also reducing the service life of the die.

[0004] The closest existing technology to this application is disclosed in patent application number CN205147018U, which discloses an anti-clogging aluminum punching die, comprising an upper die and a lower die that cooperate with each other; the upper die includes an upper die base, an upper clamping plate, a stop plate and a stripper plate connected in sequence, the upper clamping plate is fixed with a punch, and the punch passes through the stop plate and the stripper plate; the lower die includes a lower die base, a lower backing plate and a lower template connected in sequence, the lower template is fixed with a cutting edge block, and the cutting edge block is fitted with a cutting tool; the cutting tool includes a cutting edge for cooperating with the punch to punch holes, and a cutting tool channel communicating with the cutting edge, the cutting tool channel being configured as a frustum-shaped cutting tool channel; the lower backing plate has a first scrap channel communicating with the cutting tool channel, and the lower die base has a second scrap channel communicating with the first scrap channel.

[0005] Existing aluminum alloy stamping die structures only optimize the scrap discharge channel to reduce die blockage, but they lack a dedicated in-die lubrication structure and effective pressing and limiting functions. This makes it easy for aluminum alloy sheets to generate aluminum chips and deviate during the stamping process, which seriously affects the surface quality of the product and shortens the service life of the die.

[0006] Therefore, there is an urgent need for a new type of aluminum alloy stamping die structure that can reduce aluminum chip generation from the source through active lubrication within the die and precise blanking limit control, thereby improving the stamping quality of products and the durability of the die to meet the development needs of lightweight new energy vehicles. Utility Model Content

[0007] In view of this, this utility model proposes an in-mold oil supply lubrication mold structure for aluminum stamping that features in-mold active lubrication and a simple structure.

[0008] An in-die lubrication mold structure for aluminum stamping is characterized by comprising an upper die assembly 10, a lower die assembly 20, a blanking assembly 30, and an oil supply assembly 40. The upper die assembly 10 and the lower die assembly 20 are arranged opposite to each other and cooperate to realize the stamping action. The blanking assembly 30 is mounted on the upper die assembly 10 and can move up and down relative to the lower die assembly 20 with the upper die assembly 10. The oil supply assembly 40 is used to continuously supply oil to the blanking assembly 30 to achieve lubrication during the stamping process. This structure as a whole achieves stable clamping and in-die lubrication of the aluminum blank, preventing aluminum chips and improving the surface quality of the product.

[0009] In some embodiments, the upper die assembly 10 includes an upper die base 101, an upper backing plate 102, and an upper clamping plate 103, which are fixedly connected in sequence. An upper clamping plate 103 insert is installed within the upper clamping plate 103, and a punch 104 is fixed within the upper clamping plate 103 insert and is fixedly connected to the upper die base 101 by fasteners passing through the upper backing plate 102. The upper clamping plate 103 insert facilitates the installation and maintenance of the punch 104, better ensuring punching accuracy.

[0010] In some embodiments, the lower mold assembly 20 includes a lower mold base 201, a lower backing plate 202, and a lower template 203 that are sequentially connected and fixed. A cutting edge 204 is embedded within the lower template 203, and the cutting edge 204 is fixedly connected to the lower mold base 201 via fasteners on the lower backing plate 202. This embedded cutting edge 204 structure in the lower template 203 facilitates quick replacement and maintenance of the cutting edge 204, ensuring mold life and accuracy.

[0011] In some embodiments, the pressing assembly 30 includes a pressing plate 301 and a stop plate 302, with a sponge 303 sandwiched between the pressing plate 301 and the stop plate 302. An oil passage groove 304 communicating with the sponge 303 is formed on the surface of the pressing plate 301. The sponge 303 sandwiched between the pressing plate 301 and the stop plate 302, along with the oil passage groove 304, enables a uniform supply of lubricating oil, providing continuous lubrication to the punching area.

[0012] Furthermore, the pressure plate 301 and the stop plate 302 are connected and fixed by fastening screws, forming a clamping cavity between their opposing surfaces to hold the sponge 303. The height of the clamping cavity is less than the original thickness of the sponge 303, so that the sponge 303 is in a pre-compressed state. This clamping cavity structure ensures that the sponge 303 continuously releases oil and provides a stable pressure buffering effect.

[0013] Furthermore, the oil passage 304 is configured as an annular or mesh-like channel along the surface of the pressure plate 301, and has an oil supply opening near the punch 104, so that the lubricating oil is preferentially applied to the punching area. The annular or mesh-like oil passage structure plays a role in precisely guiding the lubricating oil and preferentially lubricating key areas.

[0014] In some embodiments, a guide and limiting component is also included. This component comprises an inner guide post 50 fixed to the upper die assembly 10 and an inner guide sleeve 60 fixed to the lower die assembly 20. The inner guide post 50 and the inner guide sleeve 60 slide against each other to guide the upper die assembly 10 and the lower die assembly 20. This guide and limiting component ensures smooth and precise die-cutting movement and prevents lateral displacement during cutting.

[0015] Furthermore, a lubricating grease or a wear-resistant bushing is provided between the inner guide post 50 and the inner guide sleeve 60. The lubricating grease or wear-resistant bushing serves to reduce friction and wear between the inner guide post 50 and the inner guide sleeve 60, thereby extending the service life of the mold.

[0016] In some embodiments, the pressing assembly 30 is equipped with a nitrogen spring 70, which is installed between the upper die base 101 and the stop plate 302. The nitrogen spring 70 pushes against the stop plate 302 and drives the pressing assembly 30 downward to press the aluminum material, and resets after the punching is completed. The nitrogen spring 70 serves to ensure that the pressing assembly 30 accurately and stably presses the aluminum material and automatically resets.

[0017] In some embodiments, a limiting screw 80 is also included. One end of the limiting screw 80 is fixed to the upper die holder 101, and the other end abuts against the stop plate 302, thereby limiting the maximum downward stroke of the pressing assembly 30. The limiting screw 80 controls the pressing stroke of the pressing assembly 30, preventing excessive pressing and ensuring punching accuracy and product quality.

[0018] The beneficial effects of this utility model are as follows: This utility model proposes an in-die lubrication mold structure for aluminum stamping, including an upper die assembly 10, a lower die assembly 20, a blanking assembly 30, and an oil supply assembly 40. The upper die assembly 10 and the lower die assembly 20 are arranged opposite each other to achieve precise stamping action. The blanking assembly 30 is disposed on the upper die assembly 10 and moves up and down with it, stabilizing and pressing the aluminum material before stamping and preventing positional displacement. The oil supply assembly 40 continuously supplies oil to the blanking assembly 30, forming a stable lubricating oil film in the stamping area, reducing aluminum chip generation, preventing aluminum chip adhesion, and significantly improving product surface quality. The overall structure is simple and reliable, effectively extending mold life and meeting the lightweight, high-quality stamping processing requirements of new energy vehicles. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an in-mold oil-lubricating mold structure for aluminum stamping according to this application.

[0020] Figure 2 This is a cross-sectional view of an in-mold oil-lubricated die structure for aluminum stamping according to this application.

[0021] Explanation of key component symbols: Upper mold assembly 10, upper mold base 101, upper backing plate 102, upper clamping plate 103, punch 104, lower mold assembly 20, lower mold base 201, lower backing plate 202, lower template 203, cutting edge 204, pressure assembly 30, pressure plate 301, stop plate 302, sponge 303, oil channel groove 304, oil supply assembly 40, inner guide post 50, inner guide sleeve 60, nitrogen spring 70, limit screw 80.

[0022] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0023] The following embodiments are described to aid in understanding this application. These embodiments are not, and should not be, construed in any way as limiting the scope of protection of this application.

[0024] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as individual functional units (which may include subunits), but those skilled in the art will recognize that various components or portions thereof may be divided into individual components or may be integrated together (including integrated within a single system or component).

[0025] Furthermore, the connection between components or systems is not intended to be limited to a direct connection; on the contrary, data between these components may be modified, reformatted, or otherwise altered by intermediate components. Additionally, other or fewer connections may be used. It should also be noted that the terms "connection," "link," or "input" should be understood to include direct connections, indirect connections via one or more intermediate devices, and wireless connections.

[0026] Example 1: like Figure 1 The diagram shown is an overall structural schematic of an in-die lubrication mold structure for aluminum stamping according to this application; as shown... Figure 2 The image shown is a cross-sectional view of an in-mold oil-lubricated die structure for aluminum stamping according to this application.

[0027] An in-die lubrication mold structure for aluminum stamping is characterized by comprising an upper die assembly 10, a lower die assembly 20, a blanking assembly 30, and an oil supply assembly 40. The upper die assembly 10 and the lower die assembly 20 are arranged opposite to each other and cooperate to realize the stamping action. The blanking assembly 30 is mounted on the upper die assembly 10 and can move up and down relative to the lower die assembly 20 with the upper die assembly 10. The oil supply assembly 40 is used to continuously supply oil to the blanking assembly 30 to achieve lubrication during the stamping process. This structure as a whole achieves stable clamping and in-die lubrication of the aluminum blank, preventing aluminum chips and improving the surface quality of the product.

[0028] The upper die assembly 10 includes an upper die base 101, an upper backing plate 102, and an upper clamping plate 103, which are fixedly connected in sequence. An upper clamping plate 103 insert is installed within the upper clamping plate 103. The punch 104 is fixed within the upper clamping plate 103 insert and is fixedly connected to the upper die base 101 via fasteners passing through the upper backing plate 102. The upper clamping plate 103 insert facilitates the installation and maintenance of the punch 104, better ensuring punching accuracy.

[0029] The lower mold assembly 20 includes a lower mold base 201, a lower backing plate 202, and a lower mold template 203, which are connected and fixed in sequence. A cutting edge 204 is embedded within the lower mold template 203, and the cutting edge 204 is fixedly connected to the lower mold base 201 via fasteners on the lower backing plate 202. The structure of the cutting edge 204 embedded within the lower mold template 203 facilitates quick replacement and maintenance of the cutting edge 204, ensuring mold life and precision.

[0030] The pressing assembly 30 includes a pressing plate 301 and a stop plate 302. A sponge 303 is sandwiched between the pressing plate 301 and the stop plate 302. An oil passage groove 304 communicating with the sponge 303 is formed on the surface of the pressing plate 301. The sponge 303 sandwiched between the pressing plate 301 and the stop plate 302, in conjunction with the oil passage groove 304, can achieve a uniform supply of lubricating oil, thereby continuously lubricating the punching area.

[0031] The pressure plate 301 and the stop plate 302 are connected and fixed by fastening screws, forming a clamping cavity between their opposing surfaces to hold the sponge 303. The height of the clamping cavity is less than the original thickness of the sponge 303, so that the sponge 303 is in a pre-compressed state. This clamping cavity structure ensures that the sponge 303 continuously releases oil and provides a stable pressure buffering effect.

[0032] The oil passage 304 is configured as an annular or mesh-like channel along the surface of the pressure plate 301, and has an oil supply opening near the punch 104, so that the lubricating oil is preferentially applied to the punching area. The annular or mesh-like oil passage structure plays a role in precisely guiding the lubricating oil and prioritizing the lubrication of key areas.

[0033] It also includes a guide and limiting assembly, which comprises an inner guide post 50 fixed on the upper die assembly 10 and an inner guide sleeve 60 fixed on the lower die assembly 20. The inner guide post 50 and the inner guide sleeve 60 slide together to guide the upper die assembly 10 and the lower die assembly 20. The guide and limiting assembly ensures smooth and precise die punching movement and prevents lateral displacement during punching.

[0034] A lubricating grease or a wear-resistant bushing is provided between the inner guide post 50 and the inner guide sleeve 60. The lubricating grease or wear-resistant bushing serves to reduce friction and wear between the inner guide post 50 and the inner guide sleeve 60, and to extend the service life of the mold.

[0035] The pressing assembly 30 is equipped with a nitrogen spring 70, which is installed between the upper die base 101 and the stop plate 302. The nitrogen spring 70 pushes against the stop plate 302 and drives the pressing assembly 30 downward to press the aluminum material, and resets after the punching is completed. The nitrogen spring 70 serves to ensure that the pressing assembly 30 accurately and stably presses the aluminum material and automatically resets.

[0036] It also includes a limiting screw 80, one end of which is fixed to the upper die base 101, and the other end abuts against the stop plate 302, used to limit the maximum downward stroke of the pressing assembly 30. The limiting screw 80 controls the pressing stroke of the pressing assembly 30, prevents excessive pressing, and ensures punching accuracy and product quality.

[0037] The beneficial effects of this utility model are as follows: This utility model proposes an in-die lubrication mold structure for aluminum stamping, including an upper die assembly 10, a lower die assembly 20, a blanking assembly 30, and an oil supply assembly 40. The upper die assembly 10 and the lower die assembly 20 are arranged opposite each other to achieve precise stamping action. The blanking assembly 30 is disposed on the upper die assembly 10 and moves up and down with it, stabilizing and pressing the aluminum material before stamping and preventing positional displacement. The oil supply assembly 40 continuously supplies oil to the blanking assembly 30, forming a stable lubricating oil film in the stamping area, reducing aluminum chip generation, preventing aluminum chip adhesion, and significantly improving product surface quality. The overall structure is simple and reliable, effectively extending mold life and meeting the lightweight, high-quality stamping processing requirements of new energy vehicles.

[0038] Although this application discloses several aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art. Various modifications and improvements can be made without departing from the concept of this application, and these all fall within the scope of protection of this application. The various aspects and embodiments disclosed in this application are for illustrative purposes only and are not intended to limit this application. The actual scope of protection of this application is determined by the claims.

Claims

1. An in-die lubrication mold structure for aluminum stamping, characterized in that, It includes an upper die assembly (10), a lower die assembly (20), a blanking assembly (30), and an oil supply assembly (40); the upper die assembly (10) and the lower die assembly (20) are arranged opposite to each other and cooperate to realize the blanking action; the blanking assembly (30) is installed on the upper die assembly (10) and can move up and down relative to the lower die assembly (20) with the upper die assembly (10); the oil supply assembly (40) is used to continuously supply oil to the blanking assembly (30) to achieve lubrication during the blanking process.

2. The in-die lubrication mold structure for aluminum stamping as described in claim 1, characterized in that: The upper mold assembly (10) includes an upper mold base (101), an upper pad (102), and an upper clamping plate (103) that are fixedly connected in sequence. An upper clamping plate (103) insert is installed inside the upper clamping plate (103). A punch (104) is fixed inside the upper clamping plate (103) insert and is fixedly connected to the upper mold base (101) by fasteners passing through the upper pad (102).

3. The in-die lubrication mold structure for aluminum stamping as described in claim 1, characterized in that: The lower mold assembly (20) includes a lower mold base (201), a lower pad (202), and a lower template (203) that are connected and fixed in sequence. The lower template (203) is fitted with a cutting edge (204), and the cutting edge (204) is fixedly connected to the lower mold base (201) by fasteners on the lower pad (202).

4. The in-die lubrication mold structure for aluminum stamping as described in claim 2, characterized in that: The pressing assembly (30) includes a pressing plate (301) and a stop plate (302). A sponge (303) is sandwiched between the pressing plate (301) and the stop plate (302). An oil passage groove (304) communicating with the sponge (303) is opened on the surface of the pressing plate (301).

5. The in-die lubrication mold structure for aluminum stamping as described in claim 4, characterized in that: The pressure plate (301) and the stop plate (302) are connected and fixed by fastening screws, and a clamping cavity for clamping the sponge (303) is formed between the opposite surfaces. The height of the clamping cavity is less than the original thickness of the sponge (303) so that the sponge (303) is in a pre-compressed state.

6. The in-die lubrication mold structure for aluminum stamping as described in claim 4, characterized in that: The oil passage (304) is configured as an annular or grid-like channel along the surface of the pressure plate (301), and an oil supply opening is provided near the punch (104) so ​​that the lubricating oil is preferentially applied to the punching area.

7. The in-die lubrication mold structure for aluminum stamping as described in claim 1, characterized in that: It also includes a guide limiting component, which includes an inner guide post (50) fixed on the upper mold assembly (10) and an inner guide sleeve (60) fixed on the lower mold assembly (20). The inner guide post (50) and the inner guide sleeve (60) slide together to achieve guidance between the upper mold assembly (10) and the lower mold assembly (20).

8. The in-die lubrication mold structure for aluminum stamping as described in claim 7, characterized in that: A lubricating grease or a wear-resistant bushing is provided between the inner guide post (50) and the inner guide sleeve (60).

9. The in-die lubrication mold structure for aluminum stamping as described in claim 4, characterized in that: The pressing assembly (30) is provided with a nitrogen spring (70), which is installed between the upper die base (101) and the stop plate (302). The nitrogen spring (70) pushes the stop plate (302) and drives the pressing assembly (30) to move down to press the aluminum material, and resets after the punching is completed.

10. The in-die lubrication mold structure for aluminum stamping as described in claim 4, characterized in that: It also includes a limiting screw (80), one end of which is fixed to the upper mold base (101), and the other end abuts against the stop plate (302) to limit the maximum downward stroke of the pressing assembly (30).

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