Mirror finishing method and workpiece formed by mirror finishing method

Abstract

The invention discloses a mirror surface machining method and a workpiece formed by the mirror surface machining method. The mirror surface machining method comprises the steps that a to-be-machined workpiece with the needed size is selected; a workpiece to be machined is clamped on a machining machine table; a first milling cutter is selected to conduct semi-finish machining on the shape and size of the workpiece to the needed standard size, and then a second milling cutter and a cutter path are adopted to directly cut the machining face of the workpiece through the mirror face machining technology; the workpiece is cooled while being milled, so that the situation that the temperature is too high in the milling process, tool deformation is caused, and cuttings adhere to the tool is prevented; the mirror surface machining method has the beneficial effects that the numerical control machine is used for milling the workpiece through the mirror surface machining method by adopting a special tool and a tool path, so that the finish degree of the machined surface of the workpiece can be improved by more than three levels (the roughness Ra value can reach below 0.2 mu m), and the machining precision of the workpiece is improved by more than three levels (the roughness Ra value can reach below 0.2 mu m). And the surface micro-hardness of the workpiece is improved by more than 10%, and the surface wear resistance and corrosion resistance of the workpiece are greatly improved.

Description

[Technical field]

[0001] The invention relates to the technical field of mirror surface processing technology, in particular to a mirror surface processing method and a workpiece formed thereby. [Background technology]

[0002] The general workpiece processing technology is a milling process of stainless steel and other materials using a hard end mill. When the workpiece is semi-finished, chipping sometimes occurs on the tip of the end mill, and scratches, wear marks and other undesirable processing marks are easily generated on the workpiece processing surface. The workpiece processing surface needs to be mirror polished later.

[0003] Mirror finishing technology is a process that mainly uses CNC machines to reduce the surface roughness of workpieces through milling with special tools and tool path paths. It can perform ultra-high-precision (small processing volume, generally between 0.002 and 0.005 mm) finishing milling on the scratches and wear marks produced on the workpiece surface during semi-finishing, which can eliminate bad processing marks on the workpiece surface. There is no need to mirror polish the workpiece surface later, and the mirror finishing effect can be directly achieved.

[0004] In view of this, it is necessary to provide a mirror surface processing method and a workpiece formed thereby to solve the above problems. [Summary of the invention]

[0005] The technical problem to be solved by the present invention is that during the semi-finishing process of the workpiece, the tip of the end mill will produce chipping, and the workpiece will easily produce bad processing marks such as scratches and wear marks on the workpiece processing surface. The workpiece processing surface needs to be mirror polished in the later stage. The mirror processing technology can use the CNC machine to use the special tool and tool path to adopt the milling process to reduce the surface roughness of the workpiece. The scratches and wear marks produced on the workpiece processing surface during the semi-finishing process are subjected to ultra-high-precision finishing milling, which can eliminate the bad processing marks on the workpiece surface to achieve the mirror finishing effect. Therefore, the present invention provides a mirror processing method and the workpiece formed by it to solve the above problems.

[0006] The solution of the present invention to solve the technical problem is: a mirror processing method, comprising the following steps:

[0007] S1: Workpiece to be processed: Select a workpiece of required size to be processed;

[0008] S2: Fixing the workpiece: clamping the workpiece to be processed on the processing machine;

[0009] S3: Milling workpiece: Select the first milling cutter to semi-finish the shape and size of the workpiece into the required standard size, and then use the second milling cutter and tool path to directly cut the machining surface of the workpiece through the mirror machining process;

[0010] S4: Cooling the workpiece: Cooling the workpiece while it is being milled to prevent the temperature from being too high during the milling process, causing tool deformation and chips sticking to the tool;

[0011] S5: Pick up: After the workpiece is processed, remove the workpiece from the machine, which means the required workpiece is processed.

[0012] Preferably, the workpiece may be made of stainless steel (S136 / S136H) suitable for high-gloss mirror processing, and its material hardness is HRC<52°.

[0013] Preferably, the machine can use Makino V56 for high-gloss mirror grinding, which has high accuracy and good precision performance. The spindle speed can be set to S=8000rpm / min or above (room temperature is kept within 25 degrees), and the feed speed can be F=1000mm / min, so that its processing accuracy can reach 0.005mm.

[0014] Preferably, the first milling cutter can be a tungsten steel milling cutter.

[0015] Preferably, the second milling cutter can be a diamond milling cutter, which has a very small friction coefficient with non-ferrous metals, and the chips are not easy to stick to the tool and no built-up edge will be generated. Therefore, during the processing, the blade always keeps cutting directly on the workpiece, which can ensure the smoothness of the workpiece surface.

[0016] Preferably, after the first milling cutter in the semi-finishing is replaced by the second milling cutter in the finishing, dynamic balancing (referring to a precise adjustment of the machine through dynamic balancing technology to achieve the best processing effect) must be performed to reduce the ripples on the workpiece surface caused by dynamic imbalance.

[0017] Preferably, the tool path can use a single-track tool path to grind the workpiece.

[0018] Preferably, the workpiece is cooled by blowing air, and the blowing direction is consistent with the milling direction to prevent hair chips from scratching the machined surface of the workpiece.

[0019] In addition, the present invention also provides a workpiece, which is a workpiece formed by the above-mentioned mirror processing method.

[0020] The beneficial effect of the present invention is that, through a mirror processing method, the present invention uses a CNC machine with a special tool and a tool path to mill the workpiece, which can improve the smoothness of the workpiece processing surface by more than 3 levels (the roughness Ra value can reach below 0.2μm), and the surface microhardness of the workpiece is increased by more than 10%, thereby greatly improving the surface wear resistance and corrosion resistance of the workpiece.

Brief Description of the Drawings

[0021] Figure 1It is a flow chart of a mirror processing method of the present invention.

[0022] Figure 2 It is a structural schematic diagram of a workpiece formed by a mirror surface processing method of the present invention. [Specific implementation method]

[0023] To further illustrate the technical means and effects adopted by the present invention, the following is a detailed description in conjunction with the embodiments of the present invention and the accompanying drawings.

[0024] The present invention provides a mirror processing method, comprising the following steps:

[0025] S1: Workpiece to be processed: Select a workpiece of required size to be processed;

[0026] S2: Fixing the workpiece: clamping the workpiece to be processed on the processing machine;

[0027] S3: Milling workpiece: Select the first milling cutter to semi-finish the shape and size of the workpiece into the required standard size, and then use the second milling cutter and tool path to directly cut the machining surface of the workpiece through the mirror machining process;

[0028] S4: Cooling the workpiece: Cooling the workpiece while it is being milled to prevent the temperature from being too high during the milling process, causing tool deformation and chips sticking to the tool;

[0029] S5: Pick up: After the workpiece is processed, remove the workpiece from the machine, which means the required workpiece is processed.

[0030] The workpiece may be made of stainless steel (S136 / S136H) suitable for high-gloss mirror processing, and its material hardness is HRC<52°.

[0031] Among them, the machine can use Makino V56 for high-gloss mirror grinding processing, which has high accuracy and good precision performance. The spindle speed can be set to S=8000rpm / min or above (room temperature is kept within 25 degrees), and the feed speed can be F=1000mm / min, so that its processing accuracy can reach 0.005mm.

[0032] Wherein, the first milling cutter can be a tungsten steel milling cutter.

[0033] Among them, the second milling cutter can use a diamond milling cutter. A diamond milling cutter (diamond cutter) is an ultra-precision machining tool that can evenly remove metal layers or non-metal layers that are not greater than the machining accuracy of the workpiece and are extremely thin. In addition, the friction coefficient between it and non-ferrous metals is very small, and the chips are not easy to stick to the tool and no built-up edge is generated. Therefore, the blade always keeps cutting directly on the workpiece during the machining process, which can ensure the smoothness of the workpiece surface.

[0034] Among them, after the first milling cutter in the semi-finishing is replaced by the second milling cutter in the finishing, dynamic balancing (referring to a precise adjustment of the machine through dynamic balancing technology to achieve the best processing effect) must be performed to reduce the ripples on the workpiece surface caused by dynamic imbalance.

[0035] Wherein, the tool path can use a single-track tool path to grind the workpiece.

[0036] The workpiece is cooled by blowing air, and the blowing direction is consistent with the milling direction to prevent hair chips from scratching the machined surface of the workpiece.

[0037] In addition, the present invention also provides a workpiece, which is a workpiece formed by the above-mentioned mirror processing method.

[0038] The beneficial effect of the present invention is that, through a mirror processing method, the present invention uses a CNC machine with a special tool and a tool path to mill the workpiece, which can improve the smoothness of the workpiece processing surface by more than 3 levels (the roughness Ra value can reach below 0.2μm), and the surface microhardness of the workpiece is increased by more than 10%, thereby greatly improving the surface wear resistance and corrosion resistance of the workpiece.

[0039] It should be pointed out that the present invention is not limited to the above-mentioned implementation modes, and any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments by any technician familiar with the profession based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A mirror processing method, characterized in that: It includes the following steps: S1: Workpiece to be processed: Select a workpiece of required size to be processed; S2: Fixing the workpiece: clamping the workpiece to be processed on the processing machine; S3: Milling workpiece: Select the first milling cutter to semi-finish the shape and size of the workpiece into the required standard size, and then use the second milling cutter and tool path to directly cut the machining surface of the workpiece through the mirror machining process; S4: Cooling the workpiece: Cooling the workpiece while it is being milled to prevent the temperature from being too high during the milling process, causing tool deformation and chips sticking to the tool; S5: Pick up: After the workpiece is processed, remove the workpiece from the machine, which means the required workpiece is processed.

2. A mirror processing method according to claim 1, characterized in that: The material of the workpiece may be stainless steel (S136 / S136H) suitable for high-gloss mirror processing, and the material hardness is HRC<52°.

3. A mirror processing method according to claim 1, characterized in that: The machine can use Makino MAKINO V56 for high-gloss mirror grinding processing, which has high accuracy and good precision performance. The spindle speed can be set to S=8000rpm / min or above (room temperature is kept within 25 degrees), and the feed speed can be F=1000mm / min, so its processing accuracy can reach 0.005mm.

4. A mirror processing method according to claim 1, characterized in that: The first milling cutter can be a tungsten steel milling cutter.

5. A mirror processing method according to claim 1, characterized in that: The second milling cutter may be a diamond milling cutter.

6. A mirror processing method according to claim 1, characterized in that: After the first milling cutter in the semi-finishing process is replaced with the second milling cutter in the finishing process, dynamic balancing must be performed to reduce the ripples on the workpiece surface caused by dynamic imbalance.

7. A mirror surface processing method as claimed in claim 1, characterized in that: The tool path can use a single-track tool path to grind the workpiece.

8. A mirror surface processing method as claimed in claim 1, characterized in that: The workpiece is cooled by air blowing, and the blowing direction is consistent with the milling direction to prevent hair chips from scratching the machined surface of the workpiece.

9. A workpiece, characterized in that: The workpiece is formed by the mirror processing method according to any one of claims 1 to 8.

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