Printer scraper machining method

Abstract

The invention relates to a printer scraper machining method. The method comprises the following steps that firstly, supplied materials are inspected; secondly, punching is conducted on the metal plate through a first die, and a first machining plate is obtained; the width of the first processing plate is equal to the sum of the width of the two unfolded printer scrapers and the width of the preset connecting section; thirdly, the two side ends of the first machining plate are bent through a second die, and a second machining plate is obtained; the second processing plate comprises a bottom plate and two first bending sections which are bent relative to the bottom plate; fourthly, a third mold is adopted for slitting the bottom plate, materials of a preset connecting section in the middle of the bottom plate are removed, two separated second bent sections are formed on the remaining part of the bottom plate, and two L-shaped crude products are obtained; and (5) shaping. The method can shorten the working procedures, improve the production efficiency, reduce the dependence on people and achieve high product percent of pass.

Description

Technical Field

[0001] This invention relates to the field of scraper processing, and more specifically to a method for processing printer scrapers. Background Technology

[0002] The doctor blade is a key component in a printer, typically consisting of an L-shaped metal blade base. It is used, or connected to an adhesive strip, to remove residual toner from the surface of the photosensitive drum in the toner cartridge. Current printer doctor blade manufacturing methods mainly include incoming material inspection, blanking, forming, grinding, deburring, and shaping processes. The specific steps are as follows:

[0003] Step 1: Incoming material inspection. Let the incoming material stand for a period of time to release stress and check for defects such as warping, deformation, and crushing.

[0004] Step 2: Blanking. Blanking involves cutting sheet metal to the unfolded dimensions of the product using a die. Each sheet metal piece is used to make an L-shaped scraper. The sheet metal is checked to ensure it is free of pressure marks, scratches, etc.

[0005] Step 3: Shaping. The sheet metal obtained in step 2 is bent and shaped using a bending die.

[0006] Step 4: Grinding: After the shaped scraper has been left to stand for a period of time, the working edges are ground.

[0007] Step 5: Deburring: Use sandpaper of 1500 grit or higher or an oilstone to polish and remove the burrs produced after the scraper is ground.

[0008] Step 6: Level the flatness of the scraper.

[0009] Existing printer scraper processing methods suffer from numerous steps, high reliance on manual labor for grinding and deburring, low production efficiency, easy generation of waste, and low pass rate. Summary of the Invention

[0010] To address the shortcomings of existing technologies, the purpose of this invention is to provide a printer scraper processing method that can shorten the process, improve production efficiency, reduce reliance on human labor, and achieve a high product qualification rate.

[0011] To achieve the objective of this invention, a printer scraper processing method is provided, comprising the following steps:

[0012] Step 1: Obtain metal sheets and conduct incoming material inspection;

[0013] Step 2: The metal sheet is punched using the first mold to obtain the first processed sheet material; the length of the first processed sheet material is equal to the length of the printer blade, and the width of the first processed sheet material is equal to the sum of the width of the two printer blades after unfolding and the width of the preset connecting section;

[0014] Step 3: Using a second mold, bend both ends of the first processed sheet material along the length direction parallel to the first processed sheet material to obtain a second processed sheet material; the second processed sheet material includes a base plate and two first bent segments connected to both sides of the base plate and bent relative to the base plate;

[0015] Step 4: Using a third mold, the base plate is cut along the length direction parallel to the second processed plate, and the material of the preset connecting section in the middle of the base plate is removed. The remaining part of the base plate forms two separated second bending sections. Each second bending section is connected to a first bending section, so that each second processed plate is cut into two L-shaped rough products.

[0016] Step 5: Shape the rough product to obtain the printer scraper.

[0017] In some embodiments of the present invention, in the second step, the chamfer or rounded corner of the first bent segment is punched out in a mirror-symmetrical manner with respect to the center line in the width direction of the first processed sheet.

[0018] In some embodiments of the present invention, in the second step, through holes for the first bending segment or the second bending segment are punched out in a mirror-symmetrical manner with respect to the center line in the width direction of the first processed sheet.

[0019] In some embodiments of the present invention, in the second step, multiple first processing plates are punched out at one time from a whole sheet of metal using a first mold.

[0020] In some embodiments of the present invention, in the third step, a second mold is used to simultaneously bend both ends of the first processed sheet material, and the two first bent sections on both sides of the base plate are formed simultaneously.

[0021] In some embodiments of the present invention, in the fourth step, a third mold is used to simultaneously punch both sides of the preset connecting segment, punching out two second bending segments in one go.

[0022] In some embodiments of the present invention, in the first step, the incoming material inspection includes letting the metal sheet stand for at least 10 hours, observing that the metal sheet has no visible warping, scratches, or dents, and then proceeding to the second step.

[0023] In some embodiments of the present invention, after the second step, the third step is performed only after confirming that the first processed sheet material is free of pressure marks, surface burrs, and scratches.

[0024] In some embodiments of the present invention, after the third step, the second processed sheet is left to stand for at least 3 days before proceeding to the fourth step.

[0025] In some embodiments of the present invention, in the fifth step, the shaping is performed by using a leveling machine to level the flatness of the rough product.

[0026] In some embodiments of the present invention, in the third step, the inner side of the groove formed by the base plate and the two first bending segments on both sides of the base plate is a non-burr surface, and the outer side is a burr surface; in the fourth step, the third mold punches the base plate from the non-burr surface.

[0027] In some embodiments of the present invention, the width of the second bent segment is greater than the width of the first bent segment.

[0028] In some embodiments of the present invention, the width of the second bent segment is greater than the width of the preset connecting segment.

[0029] In some embodiments of the present invention, the width of the preset connecting segment is greater than the width of the first bending segment.

[0030] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0031] The printer scraper processing method proposed in this invention mainly includes steps such as incoming material inspection, blanking, forming, slitting, and shaping. By processing two printer scrapers symmetrically on a single sheet metal sheet, the production efficiency of printer scrapers is greatly improved. Furthermore, the scraper experiences uniform cutting force, good straightness, and reduces the need for grinding and leveling. In addition, the resulting non-burr surface reduces the need for deburring. Therefore, compared to the existing one-to-one manufacturing process, this invention achieves one-to-two production, directly improving production efficiency and reducing processes, especially the labor-intensive grinding and deburring processes. This significantly increases production efficiency, reduces the defect rate, and improves the product qualification rate, effectively solving the problems of low production efficiency and extremely low qualification rate of printer scrapers in existing technologies, and is conducive to expanding the production scale of printer scrapers. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the first processed sheet in the second step of the embodiment of the printer scraper processing method of the present invention. In the figure, (a) is the front view of the first processed sheet and (b) is the side view of the first processed sheet.

[0033] Figure 2 This is a schematic diagram of the structure of the second processed sheet in the third step of the embodiment of the printer scraper processing method of the present invention. In the figure, (a) is the front view of the second processed sheet and (b) is the side view of the second processed sheet.

[0034] Figure 3This is a schematic diagram of the third step of the printer scraper processing method embodiment of the present invention.

[0035] Figure 4 This is a schematic diagram of the structure for cutting the second processing board in the fourth step of the embodiment of the printer scraper processing method of the present invention. In the figure, (a) is the front view of cutting the second processing board and (b) is the side view of cutting the second processing board.

[0036] Figure 5 This is a schematic diagram of the fourth step of the printer scraper processing method embodiment of the present invention.

[0037] Figure 6 This is a front view of the printer scraper obtained from an embodiment of the printer scraper processing method of the present invention.

[0038] Figure 7 This is a bottom view of the printer scraper obtained from an embodiment of the printer scraper processing method of the present invention.

[0039] Figure 8 This is a side view of the printer scraper obtained from an embodiment of the printer scraper processing method of the present invention.

[0040] In the above diagram, 1-first processed sheet, 2-second processed sheet, 3-first bending section, 4-base plate, 5-second bending section, 6-rounded corner or chamfer, 7-through hole, 8-preset connecting section, 9-second mold, 10-third mold.

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0042] like Figures 1 to 8 As shown, this invention provides a method for processing printer doctor blades. This method is suitable for processing and shaping printer doctor blades, which helps improve processing efficiency and product quality, and facilitates large-scale production of printer doctor blades. The resulting product is an L-shaped printer doctor blade, which can be a magnetic doctor blade, and can be used, or in conjunction with an adhesive strip, to remove residual toner from the surface of the photosensitive drum of the toner cartridge in a printer.

[0043] Specifically, the printer scraper processing method includes steps such as incoming material inspection, blanking, forming, slitting, and shaping, as follows:

[0044] The first step is incoming material inspection: Obtain metal sheets and conduct incoming material inspection. Metal sheets can be obtained through purchasing, extrusion, cold stamping, hot stamping, casting, cutting, etc., and the material can be iron or stainless steel. Incoming material inspection can employ the same methods as existing scraper processing methods. After incoming material inspection, defective products are removed before proceeding to the second step.

[0045] The second step is blanking: A first die is used to punch-cut the metal sheet, resulting in the first processed sheet material 1. The first die can be a punching die. The length of the first processed sheet material 1 is equal to the length of the printer blade, and the width of the first processed sheet material 1 is equal to the sum of the width of the two printer blades after unfolding and the width of the preset connecting section 8. That is, one first processed sheet material 1 can produce two printer blades, which are connected by the preset connecting section 8, achieving a one-to-two output. The preset connecting section 8 has a certain width, which facilitates the cutting and separation of the two printer blades and allows for dimensional control.

[0046] The third step is forming: using a second mold 9, the two ends of the first processed sheet 1 are bent along the length direction parallel to the first processed sheet 1 to obtain the second processed sheet 2. The second mold 9 can be a pressing mold, and it can include a pressing block pressed into the middle of the first processed sheet 1 and a recessed block that cooperates with the pressing block, thereby forming the second processed sheet 2. The second processed sheet 2 includes a base plate 4 and two first bent segments 3 connected to both sides of the base plate 4 and bent relative to the base plate 4, forming a groove as a whole.

[0047] The fourth step is slitting: The base plate 4 is slitted along the length of the second processed sheet 2 using a third mold 10. The third mold 10 can be a punching die. After punching, the material in the preset connecting section 8 in the middle of the base plate 4 is removed, and the remaining part of the base plate 4 forms two separated second bending sections 5. Each second bending section 5 is connected to a first bending section 3, so that each second processed sheet 2 is slitted to obtain two L-shaped rough products.

[0048] Step 5, Shaping: Shaping the rough product, for example, correcting the flatness of the first bending segment 3 and the second bending segment 5 to meet the requirements of the drawing, thus obtaining the printer scraper.

[0049] This embodiment of the printer scraper processing method improves the magnetic scraper pass rate and production efficiency by adjusting the product process route. Compared to the existing printer scraper processing method, which requires six processes including incoming material inspection, blanking, forming, grinding, deburring, and shaping, and has a product pass rate of about 30%, this embodiment reduces the process to five processes, achieving a product pass rate of over 90%, and increasing production efficiency by five times. Existing methods require grinding and deburring, which are inefficient, highly dependent on manual labor, and prone to waste. This embodiment uses a one-out-two forming method with die-cutting, resulting in higher efficiency, reduced reliance on manual labor, and mirror-symmetrical processing by the two scrapers, ensuring uniform force distribution, good straightness, and a high product pass rate.

[0050] In some examples, in the second step, while the outer contour of the first processed sheet 1 is punched out using the first mold, the rounded corners or chamfers 6 of the first bent section 3 are punched out symmetrically with respect to the center line in the width direction of the first processed sheet 1, so as to avoid sharp edges and facilitate the simultaneous forming of the rounded corners or chamfers 6 of the two scrapers.

[0051] In some examples, in the second step, while the outer contour of the first processed sheet 1 is punched out using the first mold, the through holes 7 of the first bent section 3 or the second bent section 5 are punched out in a mirror-symmetrical manner with respect to the center line in the width direction of the first processed sheet 1, so that the through holes 7 of the two scrapers can be formed at the same time.

[0052] In some examples, in the second step, multiple first processing plates 1 are punched out at once on the whole sheet metal using the first mold, further improving production efficiency.

[0053] In some examples, in the third step, the second mold 9 is used to bend both ends of the first processed sheet 1 simultaneously, and the two first bending sections 3 on both sides of the base plate 4 are formed at the same time, which further improves production efficiency and is conducive to the uniform stress on the first processed sheet 1, and is conducive to the forming and shape control of the two first bending sections 3.

[0054] In some examples, in the fourth step, the third mold 10 is used to simultaneously punch both sides of the preset connecting section 8, punching out two second bending sections 5 in one go. This is beneficial for the second processing plate 2 to be subjected to uniform force, and for the forming and shape control of the two second bending sections 5.

[0055] In some examples, the first step of incoming material inspection includes letting the metal sheet stand for at least 10 hours, which can be comparable to the standing time in the incoming material inspection steps of the prior art. This allows the stress on the metal sheet to be released, and then the metal sheet is observed to be free of defects such as warping, scratches, and dents that are not visible to the naked eye. The second step is then carried out to further improve the product qualification rate.

[0056] In some examples, after the second step, the third step is carried out only after confirming that the first processed sheet 1 is free of pressure marks, surface burrs and scratches, in order to further improve the product qualification rate.

[0057] In some examples, after the third step, the second processed sheet 2 is left to stand for at least 3 days, which can be comparable to the standing time before grinding in the prior art, to fully eliminate stress before proceeding to the fourth step, thereby further improving the product qualification rate.

[0058] In some examples, in step five, shaping involves using a leveling machine to level the flatness of the rough product, so that the flatness of the first bending segment 3 and the second bending segment 5 meets the required standards.

[0059] In some examples, in the third step, the inner side of the groove formed by the base plate 4 and the two first bending segments 3 on both sides of the base plate 4 is a non-burr surface, and the outer side is a burr surface. For example, in the first step, the first mold punches from the upper surface to the lower surface of the base plate 4, so that the upper surface forms a non-burr surface, which further forms the inner side of the groove. The lower surface may have burrs due to punching, forming a burr surface, which further forms the outer side of the groove. The non-burr surface can serve as the working surface of the scraper, and the non-burr surface does not require further processing. In the fourth step, the third mold 10 punches from the non-burr surface of the base plate 4, avoiding the formation of burrs on the non-burr surface, so that this embodiment does not require separate treatment of the burr problem.

[0060] In some examples, the width of the second bending segment 5 is greater than the width of the first bending segment 3, that is, the relatively shorter bending segment of the L-shaped scraper is formed first, and the relatively longer bending segment is formed later, which is beneficial to leave more space on the bottom plate 4 for the third mold 10 to punch during the fourth step of cutting.

[0061] In some examples, the width of the second bend segment 5 is greater than the width of the preset connecting segment 8, reducing material waste.

[0062] In some examples, the width of the pre-defined connecting segment 8 is greater than the width of the first bending segment 3, which is beneficial for the third mold 10 to cut.

[0063] Finally, it should be emphasized that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for processing a printer scraper, characterized in that... Includes the following steps: Step 1: Obtain metal sheets and conduct incoming material inspection; Step 2: Use the first mold to punch and cut the metal sheet to obtain the first processed sheet material; The length of the first processed sheet is equal to the length of the printer blade, and the width of the first processed sheet is equal to the sum of the width of the two printer blades after unfolding and the width of the preset connecting section; Step 3: Using a second mold, bend both ends of the first processed sheet material along the length direction parallel to the first processed sheet material to obtain a second processed sheet material; the second processed sheet material includes a base plate and two first bent segments connected to both sides of the base plate and bent relative to the base plate; Step 4: Using a third mold, the base plate is cut along the length direction parallel to the second processed plate, and the material of the preset connecting section in the middle of the base plate is removed. The remaining part of the base plate forms two separated second bending sections. Each second bending section is connected to a first bending section, so that each second processed plate is cut into two L-shaped rough products. Step 5: Shape the rough product to obtain the printer scraper.

2. The printer scraper processing method according to claim 1, characterized in that: In the second step, the chamfer or rounded corner of the first bent section is punched out using a first mold in a mirror-symmetrical manner with respect to the center line in the width direction of the first processed sheet material. And / or, in the second step, a first die is used to punch out through holes in the first bent section or the second bent section in a mirror-symmetrical manner with respect to the center line in the width direction of the first processed sheet.

3. A printer scraper processing method according to claim 1 or 2, characterized in that: In the second step, multiple first-processed plates are punched out from the entire metal sheet using the first mold in one go.

4. A printer scraper processing method according to claim 1 or 2, characterized in that: In the third step, a second mold is used to simultaneously bend both ends of the first processed sheet material, and the two first bent sections on both sides of the base plate are formed simultaneously.

5. A printer scraper processing method according to claim 1 or 2, characterized in that: In the fourth step, a third mold is used to simultaneously punch both sides of the preset connecting section, punching out two second bending sections in one go.

6. A printer scraper processing method according to claim 1 or 2, characterized in that: In the first step, the incoming material inspection includes letting the metal sheet stand for at least 10 hours, observing that the metal sheet has no visible warping, scratches, or dents, and then proceeding to the second step.

7. A printer scraper processing method according to claim 1 or 2, characterized in that: After the second step, confirm that the first processed sheet material is free of pressure marks, surface burrs and scratches before proceeding to the third step; After the third step, the second processed sheet material is left to stand for at least 3 days before proceeding to the fourth step.

8. A printer scraper processing method according to claim 1 or 2, characterized in that: In the fifth step, the shaping process involves using a leveling machine to level the flatness of the rough product.

9. A printer scraper processing method according to claim 1 or 2, characterized in that: In the third step, the inner side of the groove formed by the base plate and the two first bending segments on both sides of the base plate is a non-burr surface, and the outer side is a burr surface; In the fourth step, the third die punches the base plate from the burr-free surface.

10. A printer scraper processing method according to claim 1 or 2, characterized in that: The width of the second bend is greater than the width of the first bend; The width of the second bent segment is greater than the width of the preset connecting segment; The width of the preset connecting segment is greater than the width of the first bending segment.

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