Magnetic roller shell surface roughening processing technology

Abstract

A magnetic roller shell surface roughening processing technology relates to the technical field of magnetic roller metal surface processing for printers and the like, a magnetic polishing machine is adopted, a polishing groove is formed in the magnetic polishing machine, partitions are arranged in the polishing groove to divide the polishing groove into N cells, the cells are used for placing collision materials and a magnetic roller shell, medium water is placed in the polishing groove, and the magnetic roller shell is placed in the medium water. The collision material is driven by the magnetic field to collide the surface of the magnetic roller shell in medium water to form a pit, and the magnetic roller shell is collided to rotate, so that the whole outer surface of the magnetic roller shell can be collided; and the pits which are impacted by the collision material for multiple times are overlapped in a staggered manner to realize the surface roughening treatment of the magnetic roller shell. Therefore, the overall abrasive resistance of the magnetic roller shell is improved, the conductivity is improved, the negative direct current bias overload phenomenon is reduced, the drum core is better protected, and the carbon powder consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface processing of magnetic rollers used in printers and the like, and in particular to a surface roughening processing technology for a magnetic roller shell. Background Art

[0002] In existing magnetic roller production for copiers and printers, the surface roughness of the metal or alumina shells used for the rollers directly affects charge distribution, even leading to intermittent, blank areas during printing. Therefore, surface roughening is necessary to increase surface area, improve toner carrying efficiency, and prevent toner agglomeration. Traditionally, roughening is achieved by spraying a mixture of chemical coatings and auxiliary materials. This requires precise coating mixing techniques, and the spraying and high-temperature baking process produce powder and toxic gases, polluting the environment.

[0003] CN116618845A discloses a laser melting process for producing magnetic rollers. The process utilizes a high-power laser beam to strike the surface of the roller shell. The heat from the beam vaporizes the surface material, forming pits and roughening the shell. However, this process relies on a high-precision, high-power laser generator, requiring highly precise and fragile core optical components. This leads to high energy consumption, high operating costs, and low production efficiency.

[0004] In summary, how to manufacture a magnetic roller shell with qualified roughness while overcoming the defects in chemical spraying treatment and avoiding the shortcomings of high cost and low production efficiency of laser treatment has become a key issue that the industry urgently needs to solve. Summary of the Invention

[0005] The present invention provides a surface roughening process for a magnetic roller shell, which solves the problems existing in the background technology.

[0006] The technical solution of the present invention is: a surface roughening processing process for a magnetic roller shell, characterized by: using a magnetic polishing machine, the magnetic polishing machine is provided with a polishing tank, the polishing tank is provided with a baffle to divide the polishing tank into N cells, the cells are used to place a collision material and a magnetic roller shell, medium water is placed in the polishing tank, the collision material is driven by a magnetic field to impact the surface of the magnetic roller shell in the medium water to form pits, the magnetic roller shell is subjected to a rotational motion due to the impact, so that the entire outer surface of the magnetic roller shell is impacted; after the collision material is impacted multiple times, the pits are staggered and superimposed to achieve surface roughening of the magnetic roller shell; the steps are as follows: 1. Place the magnetic roller shell and the impact material to be processed into the polishing tank of the magnetic polishing machine, and inject water medium into the polishing tank; 2. After starting the magnetic polishing machine, the impact material hits the surface of the magnetic roller shell under the action of its magnetic field, forming pits on the surface; at the same time, the magnetic roller shell continuously rolls and rotates under the action of water, so that the impact material can hit different positions of the shell; as time goes by, the impact position gradually covers the entire surface of the magnetic roller shell until the pits cover the entire shell, eventually forming a rough surface of the magnetic roller shell.

[0007] A further process for roughening the surface of a magnetic roller shell is described, characterized in that: the cells are arranged in a rectangular shape, the long sides of the cells are parallel to the long sides of the polishing grooves, the length of the long sides of the cells is greater than the length of the magnetic roller shell being processed, and the length of the short sides of the cells is less than the length of the magnetic roller shell being processed.

[0008] A further process for roughening the surface of a magnetic roller shell is characterized in that: the cell barriers adopt longitudinal partitions and transverse partitions with through-holes, and the longitudinal partitions and the transverse partitions are installed at right angles to each other to ensure that the magnetic roller shell can only rotate radially within the cell and cannot flip axially. The impact material is limited to moving within the cell and cannot move to other cells, ensuring that the amount of impact material in each cell is even, so that the impact material can evenly and comprehensively impact the surface of the magnetic roller shell.

[0009] A further process for roughening the surface of a magnetic roller shell is described, characterized in that the magnetic polishing machine works for 2-30 minutes each time, the magnetic polishing machine disk rotates forward and reverse for half the time, the rotation speed is 800-1800 r / min, and the translation frequency is 10-50 times / min.

[0010] A further process for roughening the surface of a magnetic roller shell is characterized in that the ratio of the total mass of the impact material placed in the polishing tank to the total mass of the magnetic roller shell is 1 to 5:1, ensuring that the impact material can impact the surface of the magnetic roller shell in an all-round manner in a short time.

[0011] The surface roughening process of the magnetic roller shell is further characterized in that the height of the water medium injected into the polishing tank is 1-5 times the stacking height of the magnetic roller shell to be processed, ensuring that the magnetic roller shell is in a suspended state when moving in water.

[0012] The above-mentioned magnetic roller shell surface roughening process is further characterized in that the hardness of the material of the impact material is higher than the hardness of the magnetic roller shell material.

[0013] The above-mentioned magnetic roller shell surface roughening process is further characterized in that the material of the impact material is magnetic stainless steel.

[0014] The further described magnetic roller shell surface roughening processing technology is characterized in that: the impact material is needle-shaped or spherical, and when it is spherical, the diameter range is 0.1mm≤d≤3mm; when it is needle-shaped, the needle length is 3-16mm, and the needle body diameter is 0.1mm≤d≤3mm.

[0015] The further described magnetic roller shell surface roughening processing technology is characterized in that: the magnetic polishing machine is a magnetic polishing translation machine, the magnetic field strength is 0.1-1.2T, the rotation speed is 800-1800r / min, and the translation reciprocating frequency is 10-50 times / min.

[0016] Beneficial effects of the present invention: The traditional magnetic polishing machine is used to roughen the metal surface of the magnetic roller, which is a new invention of the polishing machine.

[0017] Traditionally, the surface of the magnetic roller shell is roughened using a spray coating process. This process involves spraying a conductive material onto the surface of the roller shell to create a rough, convex surface. However, this convex surface is affected by the action of the powder scraper and the distance between the drum core and the roller during use, keeping the roughness below 2.0 microns. Otherwise, the coating will easily fall off due to the powder scraper, shortening its service life. However, the present invention uses impact to create pits on the surface of the magnetic roller shell, achieving a surface roughness of 1.7-10.41 microns, enabling bottom-free printing. Because the pitted surface is roughened, it is unaffected by the action of the powder scraper and the distance between the drum core and the roller, extending its service life.

[0018] Specifically, a surface roughening process for a magnetic roller shell is provided. Polishing grooves are arranged to form N unit cells. The magnetic roller shell is positioned longitudinally within the polishing grooves, ensuring that the length of the magnetic roller shell is parallel to the long sides of the polishing grooves. This prevents the magnetic roller shell from piling up in the polishing grooves, which could affect the impact of the material. Furthermore, the material, driven by the magnetic field and the resistance of the water, impacts the surface of the magnetic roller shell perpendicularly. Simultaneously, the magnetic roller shell rotates radially in the water under the disturbance of the water, achieving effective all-round impact on the surface of the magnetic roller shell. The water guides the impact direction of the material, preventing random impact or splashing. The high-speed impact of the material forms pits on the surface of the magnetic roller shell. The overlapping and staggered pits create the desired roughness. The setting of the cell structure ensures that the impact material moves within the cells of the same row of the entire polishing groove, ensures the acceleration distance of the impact material, limits the disordered movement of the magnetic roller shell in the polishing groove, and ensures that the movement direction of the impact material intersects with the surface of the magnetic roller shell, thereby increasing the probability of impact and shortening the impact time. At the same time, the impact material is limited to moving within its own cell and cannot move to other cells, ensuring that the number of impact materials in each cell is average, avoiding radial aggregation of impact materials, resulting in the problem that the surface of the magnetic roller shell is partially not impacted, and realizing comprehensive impact of the impact material on the surface of the magnetic roller shell.

[0019] By adjusting the polishing machine speed, changing the size and depth of the pits during impact, and controlling the impact duration, the present invention effectively controls the surface roughness of the magnetic roller shell to between 1.7 and 10.41 microns. This improves the overall wear resistance of the magnetic roller shell, increases its electrical conductivity, reduces negative DC bias overload, and ultimately better protects the drum core while reducing carbon powder consumption. In summary, the present invention not only produces magnetic rollers with acceptable roughness, but also overcomes the technical requirements of chemical spraying processes, which are associated with environmental pollution from powder and toxic gases, and avoids the high costs and low production efficiency of laser processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a top view of the polishing tank of the present invention containing materials; Figure 2 This is a schematic diagram of the three-dimensional structure of the polishing tank of the present invention; Figure 3 Comparison photos of the surface of the magnetic roller shell before and after roughening processing of the present invention; In the figure: cell 1, magnetic roller shell 2, baffle 3, polishing groove 4, impact material 5, longitudinal partition 6, transverse partition 7; Figure 3 The upper magnetic roller in the middle is before processing, and the lower magnetic roller is after processing. DETAILED DESCRIPTION

[0021] A magnetic roller shell surface roughening processing technology adopts a magnetic polishing machine. The magnetic polishing machine is provided with a polishing groove 4. The polishing groove 4 is provided with a baffle 3 to divide the polishing groove 4 into N cells 1. The cells 1 are used to place a collision material 5, a magnetic roller shell 2 and a medium water. The collision material 5 is driven by a magnetic field to impact the surface of the magnetic roller shell 2 in the medium water to form pits. The magnetic roller shell 2 is subjected to a rotational motion by the collision, so that the entire surface of the magnetic roller shell 2 can be impacted. After multiple collisions by the collision material 5, the pits of the magnetic roller shell 2 are staggered and superimposed to achieve surface roughening treatment.

[0022] The cell 1 is arranged in a rectangular shape, with the long side of the cell 1 parallel to the long side of the polishing groove 4. The size of the cell 1 is based on the length of the long side being greater than the length of the magnetic roller shell 2 being processed; the cell baffle 3 adopts a longitudinal partition 6 with a through opening and a transverse partition 7 with a through opening, and the longitudinal partition 6 and the transverse partition 7 are installed at right angles.

[0023] The surface roughening process of the magnetic roller shell comprises the following steps: 1. Place the magnetic roller shell 2 and the impact material 5 to be processed into the polishing tank 4 of the magnetic polishing machine, and inject water into the polishing tank 4; 2. After starting the magnetic polishing machine, the impact material 5 impacts the surface of the magnetic roller shell 2 under the action of its magnetic field, forming pits on the surface; at the same time, the magnetic roller shell 2 continuously rolls and rotates under the action of water, so that the impact material 5 can impact different positions of the magnetic roller shell 2; as time goes by, the impact position gradually covers the entire surface of the magnetic roller shell 2 until the pits cover the entire shell, eventually forming a rough surface of the magnetic roller shell 2.

[0024] The total mass ratio of the impact material 5 placed in the polishing tank 4 to the total mass of the magnetic roller shell 2 is 1~5:1; the height of the water medium injected into the polishing tank 4 is 1-5 times the stacking height of the magnetic roller shell 2 to be processed; the material hardness of the impact material 5 is higher than the material hardness of the magnetic roller shell 2; the impact material 5 is needle-shaped or spherical.

[0025] A magnetic polishing translation machine is used, with a magnetic field strength of 0.1-1.2T, a rotation speed of 800-1800r / min, and a translation reciprocating frequency of 10-50 times / min; the magnetic polishing machine works for 2-30 minutes each time. Example 1

[0026] On the basis of the above, the total mass ratio of the impact material 5 placed in the polishing tank 4 to the total mass of the magnetic roller shell 2 is 1:1. The height of the water medium injected into the polishing tank 4 is 3 times the stacking height of the magnetic roller shell 2 to be processed. The material of the impact material 5 is a magnetic stainless steel ball, and the diameter of the impact material 5 is 2mm. A magnetic polishing translation machine is used, the magnetic field strength is selected to be 0.1T, the rotation speed is 800r / min, and the translation reciprocating frequency is 10 times / min; the magnetic polishing machine works for 30 minutes each time. The roughness of the magnetic roller shell surface after processing is effectively controlled at 3.744 microns. Printing test data: the average blackness value of the black version of the first page is 1.31, the bottom gray of the white version is 0.02, and the average blackness value of the black version of 1000 pages is 1.19. Example 2

[0027] On the basis of the above, the total mass ratio of the impact material 5 placed in the polishing tank 4 to the total mass of the magnetic roller shell 2 is 2:1. The height of the water medium injected into the polishing tank 4 is 3 times the stacking height of the magnetic roller shell 2 to be processed. The material of the impact material 5 is preferably a magnetic stainless steel ball with a diameter of 0.1mm. A magnetic polishing translation machine is used, the magnetic field strength is selected to be 0.5T, the rotation speed is 1000r / min, and the translation frequency is 50 times / min; the magnetic polishing machine works for 20 minutes each time, and the magnetic polishing machine disk has half the forward and reverse time. The roughness of the surface of the magnetic roller shell 2 after processing is effectively controlled at 3.306 microns. Printing test data: the average blackness value of the black version of the first page is 1.36, the white version has a gray background of 0.02, and the average blackness value of the black version of 1000 pages is 1.31. Example 3

[0028] The total mass ratio of the impact material 5 placed in the polishing tank 4 to the total mass of the magnetic roller shell 2 is 2:1. The height of the aqueous medium injected into the polishing tank 4 is three times the stacked height of the magnetic roller shell 2 to be processed. The material hardness of the impact material 5 is higher than the material hardness of the magnetic roller shell 2. The impact material 5 is made of magnetic stainless steel balls. The diameter of the impact material 5 is 3 mm.

[0029] A magnetic polishing machine was used, with a magnetic field strength of 0.9T, a rotation speed of 1500 rpm, and a translation frequency of 10 times / min. Each operating period of the machine lasted 20 minutes, with half the time spent in forward and reverse rotation. The surface roughness of the magnetic roller shell after processing was effectively controlled at 4.858 microns. Printing test data showed that the average blackness value of the first black page was 1.51, the white page background gray was 0.02, and the average blackness value of 1000 pages printed on the black page was 1.5. Example 4

[0030] The total mass ratio of the impact material 5 placed in the polishing tank 4 to the total mass of the magnetic roller shell 2 is 3:1. The height of the aqueous medium injected into the polishing tank 4 is 1 times the stacked height of the magnetic roller shell 2 to be processed. The impact material 5 is made of a magnetic stainless steel needle. The diameter of the impact material 5 is 1.2 mm and the length is 3 mm.

[0031] A magnetic polishing machine was used, with a magnetic field strength of 0.6T, a rotation speed of 1200 rpm, and a translation frequency of 10 times / min. Each operating period of the machine lasted 20 minutes, with half the time spent in forward and reverse rotation. The surface roughness of the magnetic roller shell after processing was effectively controlled at 3.326 microns. Printing test data showed that the average blackness value of the first black page was 1.49, the white page background gray was 0.02, and the average blackness value of 1000 pages of printing was 1.48. Example 5

[0032] The total mass ratio of the impact material 5 placed in the polishing tank 4 to the total mass of the magnetic roller shell 2 is 5:1. The height of the aqueous medium injected into the polishing tank 4 is 5 times the stacked height of the magnetic roller shell 2 to be processed. The impact material 5 is made of a magnetic stainless steel needle. The diameter of the impact material 5 is 0.1 mm and the length is 6 mm.

[0033] A magnetic polishing machine was used, with a magnetic field strength of 1.2T, a rotation speed of 1800 rpm, and a translation frequency of 30 times / min. Each operating period of the machine lasted two minutes, with half the time spent in forward and reverse rotations. The surface roughness of the magnetic roller housing 2 after processing was effectively controlled at 10.21 microns. Printing test data showed that the average blackness value of the first black page was 1.58, and the white page background gray was 0.02. After printing 1000 pages, the average blackness value of the black page was 1.58. Example 6

[0034] The ratio of the total mass of the impact material 5 placed in the polishing tank 4 to the total mass of the magnetic roller shell 2 is 5:1. The height of the water medium injected in the polishing tank 4 is 5 times the stacking height of the magnetic roller shell 2 to be processed. The material of the impact material 5 is magnetic stainless steel needle. The diameter of the impact material 5 is 3 mm, and the length is 16 mm.

[0035] The magnetic force polishing translation machine is used, the magnetic field strength is selected as 1.2T, the rotating speed is 1800r / min, the translation back and forth frequency is 30 times / min; the working time of the magnetic force polishing machine is 2 minutes each time, and the positive and negative rotating time of the magnetic disk of the magnetic force polishing machine is half. After the surface processing of the magnetic roller shell 2, the effective control of the roughness is 10.41 microns. The printing data is that the average blackness value of the first page black version is 1.56, the white version bottom gray is 0.02, and the average blackness value of the black version after printing 1000 pages is 1.57.

Claims

1. A process for roughening the surface of a magnetic roller shell, characterized by: A magnetic polishing machine is used. The magnetic polishing machine is provided with a polishing tank. The polishing tank is provided with a baffle to separate the polishing tank into N cells. The cells are used to place the impact material and the magnetic roller shell. The medium water is placed in the polishing tank. The impact material is driven by the magnetic field to hit the surface of the magnetic roller shell in the medium water to form pits. The magnetic roller shell is hit and rotates, so that the entire outer surface of the magnetic roller shell is impacted. After multiple impacts by the impact material, the pits are staggered and superimposed to achieve the surface roughening of the magnetic roller shell. The steps are as follows: 1) Place the magnetic roller shell and the impact material to be processed into the polishing tank of the magnetic polishing machine, and inject water medium into the polishing tank; 2) After the magnetic polishing machine is started, the impact material hits the surface of the magnetic roller shell under the action of its magnetic field, forming pits on the surface; at the same time, the magnetic roller shell continuously rolls and rotates under the action of water, so that the impact material can hit different positions of the shell; As time goes by, the impact positions gradually cover the entire surface of the magnetic roller shell until the pits cover the entire shell, eventually forming a rough surface of the magnetic roller shell.

2. The process for roughening the surface of a magnetic roller shell according to claim 1, wherein: The cells are arranged in a rectangular shape, with the long sides of the cells parallel to the long sides of the polishing grooves. The length of the long sides of the cells is greater than the length of the processed magnetic roller shell, and the length of the short sides of the cells is less than the length of the processed magnetic roller shell.

3. The process for roughening the surface of a magnetic roller shell according to claim 1, wherein: The cells are separated by longitudinal and transverse partitions with through openings, which are installed at right angles to each other to ensure that the magnetic roller shell can only rotate radially in the cells and cannot flip axially. The impact material is limited to moving within the cells and cannot move to other cells, ensuring that the amount of impact material in each cell is even, so that the impact material can have a uniform and comprehensive impact on the surface of the magnetic roller shell.

4. The process for roughening the surface of a magnetic roller shell according to any one of claims 1 to 3, wherein: The working time of the magnetic polishing machine is 2-30 minutes each time: the magnetic polishing machine disk rotates forward and reverse for half the time, and the speed is: 800-1800r / min.

5. The process for roughening the surface of a magnetic roller shell according to claim 4, wherein: The ratio of the total mass of the impact material placed in the polishing tank to the total mass of the magnetic roller shell is 1~5:1, ensuring that the impact material can impact the surface of the magnetic roller shell in an all-round manner in a short time.

6. The process for roughening the surface of a magnetic roller shell according to claim 4, wherein: The height of the water medium injected into the polishing tank is 1-5 times the stacking height of the magnetic roller shell to be processed.

7. The process for roughening the surface of a magnetic roller shell according to claim 4, wherein: The material hardness of the impact material is higher than the hardness of the magnetic roller shell material.

8. The process for roughening the surface of a magnetic roller shell according to claim 4, wherein: The impact material is needle-shaped or spherical. When it is spherical, the diameter range is 0.1mm≤d≤3mm; when it is needle-shaped, the needle length is 3-16mm, and the needle body diameter is 0.1mm≤d≤3mm.

9. The process for roughening the surface of a magnetic roller shell according to claim 4, wherein: The magnetic polishing machine is a magnetic polishing translation machine with a magnetic field strength of 0.1-1.2T.

10. The process for roughening the surface of a magnetic roller shell according to claim 4, wherein: The magnetic polishing machine is a magnetic polishing translation machine, and the translation reciprocating frequency is 10-50 times / min.

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