A lubrication method for blank grinding and vibration assistance during gas cylinder forming process

Abstract

This invention relates to the field of aluminum alloy high-pressure gas cylinder forming technology, and provides a method for lubrication using blank grinding and vibration assistance during the gas cylinder forming process. The method includes the following steps: material preparation, preparing aluminum alloy blanks of a predetermined length and diameter according to production requirements; surface treatment, treating the surface roughness of the aluminum alloy blanks; lubrication, spraying or applying lubricant to the aluminum alloy blanks on a vibration device; and finally, gas cylinder extrusion forming. This invention utilizes the synergistic effect of surface microstructure adhesion and vibration assistance to achieve lubricant leveling. Specifically, the adhesion effect of the physical structure and the adsorption of the lubricant itself enhance the adhesion effect. The uniform, interlaced microgrooves formed by cross-grinding form a strong bond with the lubricant and have a certain oil storage and slow-release effect. Simultaneously, the fully adhered and uniform lubricated layer formed by vibration-assisted spraying effectively extends the effective lubrication time, making the lubrication effect more durable and stable.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy high-pressure gas cylinder forming technology, and in particular to a lubrication method for blank grinding and vibration assistance during the gas cylinder forming process. Background Technology

[0002] In the field of aluminum alloy extrusion molding, especially in the manufacturing of high-performance products such as high-pressure gas cylinders, lubrication of the billet before extrusion is a crucial step in reducing friction, minimizing defects, and ensuring molding quality. Currently, the industry standard lubrication method is atmospheric pressure spraying, where lubricant is directly sprayed onto the surface of the conventionally cleaned billet, forming a physically adhered lubricating film. However, the high friction, high temperature, and high pressure environment during aluminum alloy gas cylinder extrusion can easily lead to lubrication failure, resulting in issues such as aluminum sticking to the die, uneven cylinder wall thickness, and scratches on the inner surface.

[0003] To further enhance lubrication, optimization is typically achieved through the selection of lubricants, but this significantly increases production costs. This application aims to improve the adhesion of lubricants to the billet surface, thereby increasing the retention rate of the lubricating film on the billet surface before and after it reaches the extrusion die. Based on this, this application proposes a vibration-assisted spraying and billet surface microstructure synergistic lubrication method to improve the sustainability of the lubrication effect. Summary of the Invention

[0004] (a) Technical problems to be solved This invention addresses the aforementioned deficiencies in existing technologies by proposing a lubrication method involving blank grinding and vibration assistance during gas cylinder forming. This method aims to solve the problem of poor lubrication and difficulty in maintaining long-term lubrication during the extrusion forming of aluminum alloy gas cylinders.

[0005] (II) Technical Solution To solve the above-mentioned technical problems, the present invention provides a method for blank grinding and vibration-assisted lubrication during the gas cylinder forming process, which includes the following steps: S1: Material preparation, prepare aluminum alloy blanks of preset length and diameter according to production needs; S2: Surface treatment, which involves treating the surface roughness of aluminum alloy blanks; S3: Lubrication, applying or coating lubricant to the aluminum alloy blank on the vibrating device; S4: Molding, gas cylinder extrusion molding.

[0006] S1 also includes pretreatment of the aluminum alloy blank, which includes cleaning and drying.

[0007] In S2, the surface roughness is treated by grinding the aluminum alloy blank. The polishing steps are as follows: First, grind along the first grinding direction on the surface of the aluminum alloy blank; Then grind along the second grinding direction on the surface of the aluminum alloy blank; The first grinding direction and the second grinding direction are set perpendicularly or nearly perpendicularly.

[0008] In S2, the surface roughness is treated by sandblasting the aluminum alloy blank.

[0009] In this process, the aluminum alloy blank is preheated after surface treatment, and then lubrication is achieved by spraying the aluminum alloy blank with atomized spraying.

[0010] In S3, the aluminum alloy blank begins low-frequency pre-vibration after being placed on the vibration device, and the vibration is maintained for 5 to 10 seconds after the lubricant spraying is completed.

[0011] In S3, the vibration device selects a vibration frequency during the vibration process that causes the lubricant to enter a liquid film flow state on the surface of the aluminum alloy blank.

[0012] The vibration device uses a V-shaped roller.

[0013] (III) Beneficial Effects Compared with existing technologies, this invention achieves a synergistic effect of lubricant leveling through the fixation of surface microstructures and vibration assistance. Specifically, the adhesion effect of the physical structure and the adsorption of the lubricant itself enhance the adhesion effect. The uniform and interlaced micro-grooves formed by cross-polishing form a firm bond with the lubricant and have a certain oil storage and slow-release effect. At the same time, the fully adhered and uniform lubricating layer formed by vibration-assisted spraying can effectively extend the effective lubrication time, making the lubrication effect more durable and stable. Detailed Implementation

[0014] The specific embodiments of the present invention will be described in further detail below with reference to the examples. These examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0015] This embodiment provides a method for lubrication of blank grinding and vibration assistance during the gas cylinder forming process, and its specific implementation steps are as follows: S1: Material preparation and pretreatment. Based on the production requirements of high-pressure gas cylinders, prepare aluminum alloy blanks with preset lengths and diameters. Before lubrication treatment, the blanks are pretreated, including cleaning and drying, to obtain a clean and dry aluminum alloy surface, preparing for subsequent surface structuring treatment.

[0016] S2: Surface structuring treatment, which involves treating the surface roughness of the pretreated aluminum alloy blank to form a fine uneven structure. In this embodiment, mechanical grinding is preferred, and the specific grinding steps are as follows: First, polish along the first polishing direction on the surface of the aluminum alloy blank.

[0017] Then, polish along the second polishing direction on the surface of the aluminum alloy blank.

[0018] In this process, the first and second grinding directions are perpendicular or nearly perpendicular. This multi-directional cross-grinding process can form uniform, interlaced fine grooves on the surface of the blank, significantly increasing the effective specific surface area and enabling more effective adhesion of the lubricant. In this embodiment, the surface roughness Ra value is controlled within the range of 0.5-1.5 μm, which can be achieved using a belt sander. As another optional implementation, surface roughness treatment can also be achieved using sandblasting to achieve a similar structuring effect.

[0019] S3: Vibration-assisted lubrication involves placing the surface-treated aluminum alloy blank onto a vibration device and spraying lubricant. In this embodiment, the vibration device uses V-shaped rollers to stably support the cylindrical blank and effectively transmit vibration.

[0020] During the lubrication process, after the aluminum alloy blank is placed on the vibrating device, the device begins low-frequency pre-vibration to stabilize the contact between the blank and the roller. While maintaining vibration, lubricant is sprayed onto the surface of the blank through atomization. In this process, the vibration frequency selected by the vibrating device allows the lubricant to enter a liquid film flow state on the surface of the aluminum alloy blank, promoting rapid wetting, uniform spreading, and penetration into the fine grooves formed in step S2, with high adhesion.

[0021] Post-treatment vibration: After the lubricant spraying is completed, maintain vibration for 5 to 10 seconds. This continuous vibration further promotes the uniform distribution and full penetration of the lubricant on the surface of the aluminum alloy blank, ensuring the formation of a thin, uniform, and firmly adhered lubricating film.

[0022] S4: Forming. The blank that has undergone the above grinding and vibration-assisted lubrication treatment is sent into the subsequent heating and extrusion mold for hot extrusion forming of the gas cylinder.

[0023] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A lubrication method for blank grinding and vibration-assisted lubrication during gas cylinder forming process, characterized in that, The blank grinding and vibration-assisted lubrication method during the gas cylinder forming process includes the following steps: S1: Material preparation, prepare aluminum alloy blanks of preset length and diameter according to production needs; S2: Surface treatment, which involves treating the surface roughness of aluminum alloy blanks; S3: Lubrication, applying or coating lubricant to the aluminum alloy blank on the vibrating device; S4: Molding, gas cylinder extrusion molding.

2. The lubrication method for blank grinding and vibration assistance during gas cylinder forming as described in claim 1, characterized in that, S1 also includes pretreatment of the aluminum alloy blank, which includes cleaning and drying.

3. The lubrication method for blank grinding and vibration assistance during gas cylinder forming as described in claim 1, characterized in that, In S2, the surface roughness is treated by grinding the aluminum alloy blank; The polishing steps are as follows: First, grind along the first grinding direction on the surface of the aluminum alloy blank; Then grind along the second grinding direction on the surface of the aluminum alloy blank; The first grinding direction and the second grinding direction are set perpendicularly or nearly perpendicularly.

4. The lubrication method for blank grinding and vibration assistance during gas cylinder forming as described in claim 1, characterized in that, In S2, the surface roughness is treated by sandblasting the aluminum alloy blank.

5. The lubrication method for blank grinding and vibration assistance during gas cylinder forming as described in claim 1, characterized in that, After surface treatment, the aluminum alloy blank is preheated and then coated with atomized spray to achieve lubrication.

6. The lubrication method for blank grinding and vibration assistance during gas cylinder forming as described in claim 1, characterized in that, In S3, after the aluminum alloy blank is placed on the vibration device, it begins low-frequency pre-vibration, and the vibration state is maintained for 5 to 10 seconds after the lubricant spraying is completed.

7. The lubrication method for blank grinding and vibration assistance during gas cylinder forming as described in claim 1, characterized in that, In S3, the vibration device selects a vibration frequency during the vibration process that causes the lubricant to enter a liquid film flow state on the surface of the aluminum alloy blank.

8. The lubrication method for blank grinding and vibration assistance during gas cylinder forming as described in claim 1, characterized in that, The vibration device uses a V-shaped idler roller.