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A mirror grinding wheel with capillary pores and preparation method thereof

A technology of mirror grinding and fine pores, which is applied in the direction of grinding/polishing equipment, grinding devices, abrasives, etc., can solve the problems of complex devices, pellet resin dissolution, and large elasticity of grinding wheels, so as to avoid uneven dispersion and adsorption Large potential energy and high polishing efficiency

Active Publication Date: 2020-06-16
杭州量创科技咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the abrasive grains on the surface of the grinding wheel are worn away, the passivation film is scraped and removed by the workpiece material to continue. The method is complicated and the cost of the electrolytic grinding wheel is high; there are also special low-elastic binders at home and abroad, such as PVA, PVB, polyurethane, etc. The mixed resin binds the fine abrasive grains to achieve excellent mirror grinding. It is called a sponge mirror polishing grinding wheel, which is characterized by a sponge-like structure. However, the grinding wheel has a large elasticity and is suitable for surface finishing, not for surface processing ( Yuan Weijie, Deng Ritao, etc. Research on mirror grinding process of aluminum alloy with elastic grinding wheel[J].Surface Technology,2018,47(7),21-27)
[0004] The invention patent with the publication number 106944939B discloses a self-sharpening ultra-hard micro-abrasive pellet with soluble resin material and its preparation method. The "soluble" resin material on the surface of the abrasive is dissolved by the grinding liquid to form pores between the binders. , to reduce the strength of the binder and its holding force on the surrounding abrasive particles, so as to achieve the purpose of automatic on-line controllable sharpening of the abrasive tool, but this method is easy to dissolve the resin inside the pellet, resulting in a decrease in strength; the publication number is The invention patent of 104944956A discloses a method for preparing polycrystalline nano-diamond abrasive tools based on gelation reaction. The method uses polyacrylonitrile for gelation, which has high hardness and is suitable for the grinding stage; the invention patent with the publication number of 108081159A discloses a This kind of polyvinyl acetal resin mill has an organic gel forming method, which cannot be applied to water-based systems. At the same time, a single resin cannot be carbonized to form capillary pores

Method used

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  • A mirror grinding wheel with capillary pores and preparation method thereof
  • A mirror grinding wheel with capillary pores and preparation method thereof
  • A mirror grinding wheel with capillary pores and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this example, a mirror grinding wheel with fine pores was prepared, and a silicon plane lens was mirror-ground on an end grinder.

[0039] Step 1: Prepare aluminum nitride powder with a water-resistant film on the surface

[0040] By weight, mix 100g of aluminum nitride powder with an average particle size of 1 micron and 1kg of absolute ethanol, stir evenly, and heat up to 40°C in a water bath to obtain an ethanol dispersion of aluminum nitride; at the same time, dilute 600g of absolute ethanol 80g tetraethyl orthosilicate (TEOS), and 100g ammonia water diluted with 600g absolute ethanol and 100g water were added dropwise to the aluminum nitride ethanol dispersion, and the dropping rate was controlled at 2 drops / second. After reacting in a water bath for 6 hours, stop the reaction, vacuum filter, wash the product 3 times with absolute ethanol, then dry the obtained product at room temperature for 12 hours, and then calcinate at 300°C for 2 hours After cooling, pass...

Embodiment 2

[0053] Polishing comparison test: using the traditional method of powder mixing-hot pressing to prepare a mirror grinding wheel to grind the silicon flat lens, the surface morphology of the silicon flat lens obtained by grinding is as follows Figure 6 As shown, comparing the surface topography and surface diagram of the silicon plane lens of Example 1, the fine cut marks on the surface of the silicon plane lens obtained by polishing in Example 1 are uniform, while the surface roughness of the silicon plane lens prepared by the hot pressing method is It is 10.77nm, and the definition of mirror grinding is that the surface roughness after grinding is less than 10nm, so it is difficult to meet the requirements of mirror grinding. The uniform dispersion among materials of different densities is prone to agglomeration of powder particles when making fine-grained mirror grinding wheels.

[0054] At the same time, the durability comparison experiment of the grouting mirror grinding ...

Embodiment 3

[0056] The mirror grinding emery wheel that embodiment 1 obtains is carried out grinding process in the grinding fluid of different pH value (7,8,9,10,11,12,13), sodium carbonate is as acid pH regulator, other grinding parameters Consistent, observe the wear rate of the abrasive tool, such as Figure 8 shown. It can be seen from the figure that as the pH value increases, the wear rate of the grinding wheel also increases. Therefore, considering the life of the grinding wheel, it is necessary to adjust the pH value and sharpen the grinding wheel according to the passivation degree of the grinding wheel during use. At the same time, the wear of the grinding wheel is controlled. For the aluminum nitride of the water-resistant coating in the emery wheel that embodiment 1 obtains, when the material removal rate is higher, the pH value of the grinding fluid can be controlled below 9, slowing down the wear of the emery wheel, and when the material removal rate declines, the Add sod...

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Abstract

The invention discloses a mirror surface grinding wheel with fine holes and a preparation method of the mirror surface grinding wheel with the fine holes, and belongs to the field of precision machining grinding and polishing. According to the mirror surface grinding wheel, the mirror surface grinding wheel is prepared by casting a PVB and alcohol-soluble resin liquid, so that the problem of uneven powder forming and dispersing is avoided; and firstly, the characteristic that a PVB glue is high in strength after being the PCB cured is utilized to form a blank, after sintering, the alcohol-soluble resin is cured, the PVB is carbonized, the sintering and curing temperature of the alcohol-soluble resin is also a PVB carbonization temperature, a large number of fine holes are generated after the PVB carbonization, and the holes generated by adding a hole forming agent are closed holes compared with directly adding powder. According to the wheel and the method, the fine holes generated in the mirror surface grinding wheel are through fine holes, the water absorption capacity is strong, the water-soluble aluminum nitride with the water-resistant coating is added, after an aluminum nitride particle water-resistant coating on the surface layer of the mirror surface grinding wheel is ground, the aluminum nitride is hydrolyzed, the strength is reduced, the surface layer self-sharpening effect is achieved, an aluminum nitride water-resistant coating inside the mirror surface grinding wheel is protected, and it is guaranteed that the internal strength of the mirror surface grinding wheel is stable.

Description

technical field [0001] The invention belongs to the field of precision machining grinding and polishing, and relates to a mirror grinding wheel with capillary pores and a preparation method thereof. Background technique [0002] Mirror grinding refers to the workpiece after grinding, the surface roughness Ra is not more than 0.01μm, the light is like a mirror, and it can be clearly imaged, so it is called mirror grinding. Mirror grinding is mainly to remove the surface allowance of the workpiece by the micro blade of abrasive grains, and at the same time become blunt due to abrasive wear, and produce friction, extrusion, calendering and polishing on the surface of the workpiece. Therefore, to achieve mirror surface grinding generally, two measures are taken. One is to use a fine abrasive grinding wheel and use a rubber bonded elastic grinding wheel to squeeze and polish to achieve a mirror surface. This mirror surface grinding requires rough grinding-fine grinding-half Fine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/10B24D3/34B24D18/00B22F9/04B22F3/04B22F3/10C22C9/00C22C26/00C22C32/00
CPCB22F3/04B22F3/1017B22F9/04B22F2009/043B24D3/10B24D3/342B24D18/0009C22C9/00C22C32/0047C22C2026/007
Inventor 冯凯萍欧进乾周兆忠赵天晨许庆华
Owner 杭州量创科技咨询有限公司
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