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Method for preparing grinding wheel according to wet method

A grinding wheel, wet process technology, applied in manufacturing tools, metal processing equipment, grinding/polishing equipment, etc., can solve the problems of uneven distribution and size of pores, irregular formation of pores, cracks in products, etc. and porosity, size and distribution uniformity, uniformity and strength improvement

Active Publication Date: 2012-07-11
东莞市脉拓表面处理科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the mixing and stirring and the pores produced by the surfactant are greatly affected by the fluidity, viscosity and stirring intensity of the mixing system, and the above factors cannot be quantitatively controlled, and the generated bubbles are unstable, which leads to the final formation of pores. The distribution and size are not uniform; in addition, due to the high curing temperature of phenolic resin, the water evaporates quickly, the formation of pores is also irregular, and it is easy to cause cracks in the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for wet preparation of emery wheels, comprising the following preparation steps:

[0039] Step A, calculated by weight percentage, put 30% powder glue, 10% rice starch, 1% urea-formaldehyde resin, 0.1% polyvinyl alcohol and water into the reactor and stir for 20 minutes to mix, the stirring speed is: 400 revs / min, obtain mixed substance I;

[0040] Step B, the mixed substance I obtained in step A was left to stand for 7 minutes;

[0041] Step C, adding silicon carbide into the reactor, the weight ratio of the mixed substance I to the silicon carbide in the reactor is 1.2:1; stirring for 20 minutes for mixing, the stirring speed is: 400 rpm, and the mixed substance II is obtained;

[0042] Step D, then add 3% curing agent (curing agent: oxalic acid) into the reactor, the volume percent concentration of the curing agent is 0.1%; stir for 10 minutes to mix, the stirring speed is: 300 rpm, to obtain the mixed Substance III;

[0043] Step E, pouring the mixed sub...

Embodiment 2

[0048] A method for wet preparation of emery wheels, comprising the following preparation steps:

[0049] Step A, calculated by weight percentage, put 35% powder glue, 15% potato starch, 2% urea-formaldehyde resin, 0.2% polyurethane resin and water in the reactor and stir for 25 minutes to mix, the stirring speed is: 450 revs / min, obtain mixed substance I;

[0050] Step B, the mixed substance I obtained in step A was left to stand for 8 minutes;

[0051] Step C, adding silicon carbide into the reactor, the weight ratio of the mixed substance I in the reactor to silicon carbide is 1.4:1; stirring for 25 minutes for mixing, the stirring speed is: 450 rpm, and the mixed substance II is obtained;

[0052] Step D, adding 4% acetic acid into the reactor, the volume percent concentration of the acetic acid is 0.3%; stirring for 18 minutes for mixing, the stirring speed is: 380 rpm, to obtain the mixed substance III;

[0053] Step E, pouring the mixed substance III obtained in step D,...

Embodiment 3

[0058] A method for wet preparation of emery wheels, comprising the following preparation steps:

[0059] Step A, calculated by weight percentage, with 42% powder glue, 10% starch (including 2% millet starch, 2% corn starch and 6% sweet potato starch), 3% urea-formaldehyde resin, 0.2% The polyvinyl acetal resin and water were placed in the reactor and stirred for 32 minutes to mix, the stirring speed was: 500 rpm, and the mixed substance I was obtained;

[0060] Step B, the mixed substance I obtained in step A was left to stand for 8 minutes;

[0061] Step C, adding silicon carbide into the reactor, the weight ratio of the mixed substance I in the reactor to silicon carbide is 1.6:1; stirring for 30 minutes for mixing, the stirring speed is: 550 rpm, and the mixed substance II is obtained;

[0062] Step D, add 5% curing agent (wherein, comprise 2% malic acid and 3% citrate) in reactor again, the volume percentage concentration of described curing agent is 0.2%; Stir 12 minute...

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PUM

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Abstract

The invention belongs to the technical field of grinding wheel preparation and particularly relates to a method for preparing a grinding wheel according to a wet method. The method comprises the following steps: respectively adding powder glue, water, starch, binder, foaming agent and curing agent in proportion at different time, and then controlling the stirring speed, temperature and pouring speed in different preparing steps. The method provided by the invention has the advantages of simple technology and production equipment; the prepared grinding wheel is uniform in pore size and distribution; the mechanical strength, the abrasive resistance and the grinding property of the grinding wheel are greatly increased; and especially, the maximum porosity can reach 75%.

Description

technical field [0001] The invention relates to the technical field of grinding wheel manufacturing, in particular to a method for preparing grinding wheels by a wet method. technical background [0002] The traditional silicon carbide grinding wheel preparation method is usually a dry preparation process, that is, the abrasive, binder, wetting agent, and binder are mixed, sieved, formed, sintered, and processed. For example, the Chinese Patent No. is ZL90109282, which discloses a method of improving a bonded silicon carbide grinding wheel, mainly by using 13% to 20% of boron glass, 20% to 30% of clay, 50% to 65% of feldspar, Fusion binder and other substances are mixed and then sintered at 1320°C to 1370°C. However, due to the need for high-temperature sintering, the traditional method is prone to black cores and has a high scrap rate. [0003] With the development of technology, in order to improve productivity, people have gradually developed a method for preparing grind...

Claims

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Application Information

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IPC IPC(8): B24D18/00
Inventor 张贵明
Owner 东莞市脉拓表面处理科技有限公司
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