Production process of laser melting magnetic roller

Abstract

The invention discloses a laser melting magnetic roller production process, and relates to the technical field of magnetic roller production, and the specific implementation mode of the production process is as follows: a magnetic roller aluminum pipe is placed at the focus of a focused laser beam emitted by a short-wavelength laser, a magnetic roller rotates at a constant speed, and a burnt and melted nanoscale pit is formed at the focus; and the surface of the magnetic roller aluminum pipe is instantly burnt and melted, so that nanoscale pits are formed on the surface of the magnetic roller aluminum pipe in order. According to the method, the surface of the aluminum tube is treated through the high-power short-wavelength laser, no coating is needed, and the aluminum tube is formed through laser high-density firing and melting, so that adverse factors of chemical treatment are all solved, and the undesirable phenomena of bottom ash, edge ash, periodic blackening, high carbon powder consumption and the like during printing are solved.

Description

Technical Field

[0001] This invention relates to the field of magnetic roller manufacturing technology, specifically a laser melting magnetic roller manufacturing process. Background Technology

[0002] The improved process involves the manufacturing of the magnetic roller, a component of the toner cartridge. Traditional magnetic roller production uses chemical coatings for surface treatment, requiring precise control of various chemical proportions, making coating preparation difficult. The chemical coating process and high-temperature baking all produce toxic powders and gases, causing environmental pollution. The production process and use are highly susceptible to external environmental influences. Raw material and production costs are also high.

[0003] For example, the invention patent with application number CN114939833A discloses a process for surface treatment of toner drum magnetic rollers based on suction-type multi-jet nozzle sandblasting. The magnetic roller surface is treated by sandblasting, but the sand is consumed. During the production process, the sand is easily worn into a round shape, which reduces or loses the impact force, resulting in inconsistent depth of the workpiece surface. Different electrical loads lead to different powder feeding amounts. Inconsistent powder feeding amounts will cause different font sizes during printing, affecting the printing quality. Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and proposed a laser melting magnetic roller production process. Summary of the Invention

[0004] The purpose of this invention is to provide a laser melting magnetic roller manufacturing process to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A laser melting magnetic roller manufacturing process is specifically implemented as follows: the magnetic roller aluminum tube is placed at the focal point of a focused laser beam emitted by a short-wavelength laser, the magnetic roller rotates at a uniform speed, and the nanoscale pits formed at the focal point instantly burn and melt the surface of the magnetic roller aluminum tube, so that the nanoscale pits on the surface of the magnetic roller aluminum tube are arranged in an orderly manner.

[0006] Based on the above technical solutions, the present invention also provides the following optional technical solutions: In one alternative: the external optical path of the short-wavelength laser is a flying optical path system, and the laser beam emitted by the short-wavelength laser passes through the flying optical path system to form a multi-point laser beam in the shape of a fan or line.

[0007] In one alternative: the beam emitted by the short-wavelength laser needs to pass through at least three reflecting mirrors and a focusing lens before being focused onto the surface of the magnetic roller aluminum tube to be processed.

[0008] In one alternative embodiment: the laser beam emitted by the short-wavelength laser is focused to a minimum spot diameter of 0.1 mm, and the power density at the focal point is 10⁶ W / cm². 2 .

[0009] In one alternative: the melting point of the aluminum material on the surface of the magnetic roller aluminum tube is 580-740℃.

[0010] In one alternative: the reflector can be a combination of a galvanometer, a field lens, and a lens.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a high-power short-wavelength laser to treat the surface of aluminum tubes without any coating. The laser is used to burn and melt the aluminum tubes at high density, thus solving all the adverse factors of chemical treatment. It also solves the problems of background gray, edge gray, periodic blackening, and high toner consumption during printing. The toner consumption is reduced by about 15% compared to the original process. 2. In the laser metal cutting process, the present invention can also add an auxiliary gas suitable for the material being cut. The aluminum material on the surface of the magnetic roller uses nitrogen as an auxiliary gas to generate an exothermic chemical reaction with the molten metal, while helping to blow away the slag in the cut. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the surface structure of the magnetic roller in this invention.

[0013] Figure 2 This is a schematic diagram of the axial structure of the magnetic roller surface in this invention. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments listed herein are merely illustrative and not intended to limit the scope of the invention. Any obvious modifications or alterations made to this invention do not depart from the spirit and scope of the invention.

[0015] In one embodiment, such as Figure 1 and Figure 2 As shown, a laser melting magnetic roller manufacturing process is described; the specific steps are as follows: The magnetic roller aluminum tube rotates at a uniform speed. A high-intensity focused laser beam emitted by a high-power short-wavelength laser forms a highly precise micro-pit at the focal point, causing it to melt and ignite. During laser melting, the laser beam emitted from the laser generator is focused into a high-power laser beam through an external circuit system. The heat output of the beam far exceeds the heat reflected, conducted, or diffused by the aluminum on the magnetic roller surface, quickly heating the material to its vaporization temperature and evaporating to form nanoscale pits. As the beam moves linearly relative to the material, these nanoscale pits continuously form, creating nanoscale pit intervals on the surface of the magnetic roller aluminum tube. The orderly arrangement of these identical nanoscale pits creates surface roughness and increases the surface charge. The process parameters and motion trajectory during the high-power short-wavelength laser irradiation are controlled by a CNC system, and the molten slag is blown away by an auxiliary gas under a certain pressure.

[0016] In one embodiment of the invention, the laser beam emitted by the high-power short-wavelength laser can be focused to a minimum spot diameter of less than 0.1 mm, which can maintain a uniform amount of toner to reduce toner consumption, and the power density of the focal spot reaches 106 W / cm², which can improve resolution and print clarity.

[0017] Furthermore, the external optical path of the high-power short-wavelength laser adopts a flying optical path system, in which the laser beam emitted by the laser passes through the flying optical path system to form a high-frequency, high-energy multi-point laser beam in the shape of a fan or line.

[0018] In addition, a high-power short-wavelength laser, through a lens consisting of at least three reflectors including a galvanometer, a field mirror, and a lens, can precisely control and focus the laser beam, improving the accuracy of the pits on the surface of the magnetic roller aluminum tube.

[0019] In this embodiment of the invention, by adjusting the precision of the lens, if the diameter of the pit needs to be changed, pits of micrometer or millimeter size can also be formed in addition to nanometer-scale pits, in order to form magnetic rollers with different requirements.

[0020] In one embodiment of the invention, a beam emitted by a high-power, short-wavelength laser passes through at least three mirrors to a focusing lens on the cutting head, where it is focused to form a light spot on the surface of the magnetic roller to be processed. A beam expander compresses the beam divergence angle and increases the beam diameter to ensure precise size and shape of the focused spot. A galvanometer reduces the laser power density, improving the equipment's lifespan. The lens shapes the focused spot into a fan or line shape, increasing the irradiation area and improving work efficiency.

[0021] The aluminum material on the surface of the magnetic roller has a melting point of at least 580-740℃. By irradiating the surface of the aluminum tube with a laser beam, the temperature approaches the melting point, thus achieving the effect of quenching and hardening the aluminum material.

[0022] The laser melting magnetic roller production process of this invention utilizes a high-power short-wavelength laser to emit a high-frequency, high-energy laser beam. The laser beam irradiates the focal point, creating an instantaneous high temperature and forming highly precise micro-pits at the focal point. This instantaneous melting of the aluminum tube surface of the magnetic roller results in an orderly arrangement of micro-pits on the surface of the aluminum tube. These micro-pits increase the amount of toner adsorbed, and the orderly arrangement of the micro-pits makes the amount of toner adsorbed more uniform and the quantity more stable.

[0023] This laser melting magnetic roller production process utilizes a high-frequency, high-energy laser beam to instantly quench the surface of a newly formed material at high temperatures. The high-temperature quenching also hardens the tube body. The process employs a fiber laser to emit a short-wavelength laser to quench the surface of the aluminum tube at high temperatures, melting and vaporizing the surface to form the desired shape. Compared to existing chemical spraying technologies, which require high precision in paint mixing but generate harmful gases and solid waste, and involve cumbersome processing, this process eliminates all the disadvantages of chemical treatment. It also resolves issues such as background graying, edge graying, periodic blackening, short lifespan, low resolution, and high toner consumption during printing. Toner consumption is reduced by 15%, lifespan is doubled, and resolution is improved by 10%.

[0024] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A laser melting magnetic roller manufacturing process, characterized in that, The specific implementation method is as follows: the magnetic roller aluminum tube is placed at the focal point of the focused laser beam emitted by the short-wavelength laser. The magnetic roller rotates at a constant speed, and the nanoscale pits formed at the focal point burn and melt the surface of the magnetic roller aluminum tube instantly, so that the nanoscale pits on the surface of the magnetic roller aluminum tube are arranged in an orderly manner.

2. The laser melting magnetic roller production process according to claim 1, characterized in that, The external optical path of the short-wavelength laser is a flying optical path system. The laser beam emitted by the short-wavelength laser passes through the flying optical path system to form a multi-point laser beam in the shape of a fan or line.

3. The laser melting magnetic roller production process according to claim 1, characterized in that, The beam emitted by the short-wavelength laser needs to pass through at least three reflecting mirrors and a focusing lens before being focused onto the surface of the magnetic roller aluminum tube to be processed.

4. The laser melting magnetic roller production process according to claim 1, characterized in that, The short-wavelength laser emits a laser beam that is focused to a minimum spot diameter of 0.1 mm, and the power density at the focal point is 10⁶ W / cm². 2 .

5. The laser melting magnetic roller production process according to claim 1, characterized in that, The melting point of the aluminum material on the surface of the magnetic roller aluminum tube is 580-740℃.

6. The laser melting magnetic roller production process according to claim 3, characterized in that, The reflector can be a combination of a galvanometer, a field lens, and a lens.

Images