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Polyurethane grinding wheel

A technology of polyurethane and polyurethane resin, which is applied in the field of grinding wheels, can solve the problems of high manufacturing cost, complicated process, and pollution of grinding wheels, and achieve the effects of small blank retention, good balance of grinding wheels, and low sintering temperature

Inactive Publication Date: 2017-07-11
龙口东润砂轮有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The problem to be solved by the present invention is that the existing grinding wheel has high manufacturing cost, time-consuming, complex process and even pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A polyurethane ceramic grinding wheel

[0075] 1. Raw materials

[0076] Brown fused alumina 46#: 90kg

[0077] Polyurethane A: 5.2kg

[0078] Polyurethane B: 5.3kg

[0079] Silica: 0.8kg

[0080] 2. Production process

[0081] The first step: mixing materials: put brown corundum 46#, polyurethane A material into the mixer and mix, then add polyurethane B material and mix, then add silicon dioxide and mix evenly;

[0082] The second step: sieve the mixture and put it into the mold, and press it with a hydraulic press;

[0083] Step 3: Put the green body into the sintering furnace for sintering for 16 hours. The temperature in the furnace will continue to rise from room temperature to 160°C at a constant speed. After 16 hours of sintering, it will just rise to 160°C. Then close the furnace; open the furnace door and let it cool for 1 hour before taking it out of the furnace.

Embodiment 2

[0085] A polyurethane ceramic grinding wheel

[0086] 1. Raw materials

[0087] Brown fused alumina 60#: 100kg

[0088] Polyurethane A: 5.4kg

[0089] Polyurethane B: 5.5kg

[0090] Silica: 0.7kg

[0091] 2. Production process

[0092] The first step: mixing materials: put brown corundum 60#, polyurethane A material into the mixer and mix, then add polyurethane B material and mix, then add silicon dioxide and mix evenly;

[0093] The second step: sieve the mixture and put it into the mold, and press it with a hydraulic press;

[0094] Step 3: Put the green body into the sintering furnace for sintering for 21 hours. The temperature in the furnace will continue to rise from room temperature to 150°C at a constant speed. After sintering for 21 hours, it will just rise to 150°C. Then close the furnace; open the furnace door and let it cool for 1 hour before taking it out of the furnace.

Embodiment 3

[0096] A polyurethane ceramic grinding wheel

[0097] 1. Raw materials

[0098] White corundum 80#: 100kg

[0099] Polyurethane A: 5.5kg

[0100] Polyurethane B: 5.7kg

[0101] Silica: 0.8kg

[0102] 2. Production process

[0103] The first step: mixing materials: put white corundum 80# and polyurethane A material into the mixer for mixing, then add polyurethane B material and mix, then add silicon dioxide and mix evenly;

[0104] The second step: sieve the mixture and put it into the mold, and press it with a hydraulic press;

[0105] Step 3: Put the green body into the sintering furnace for sintering for 22 hours. The temperature in the furnace will continue to rise from room temperature to 160°C at a constant speed. After sintering for 22 hours, it will just rise to 160°C. Then close the furnace; open the furnace door and let it cool for 1 hour before taking it out of the furnace.

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Abstract

The invention discloses a polyurethane grinding wheel and a production process thereof. According to the polyurethane grinding wheel, abrasive materials in raw materials are carborundum, and polyurethane is adopted as a binding agent; and the polyurethane comprises a polyurethane material A and a polyurethane material B. The production process includes the steps that material mixing is firstly carried out, wherein the carborundum and the polyurethane material A are put into a material mixing machine to be mixed, and the polyurethane material B and auxiliary materials are sequentially added to be evenly mixed; then a mixed material is screened to be placed into a die to be subject to pressing molding; and finally, a green body is sintered for 8 h to 24 h at the temperature ranging from 125 DEG C to 165 DEG C, and is cooled to be discharged out of a furnace. According to the production process, the polyurethane serves as the binding agent to produce the grinding wheel, the auxiliary materials in an existing grinding wheel recipe can be applied to the method according to the production requirement, and the manufactured grinding wheel has the beneficial effects that the sintering temperature is low, saved energy resources are many, pollution is avoided, the molding density is large, the grinding wheel balance is good, the rotating speed is high, the grinding performance is high, and the production period is short, and the quality of products in the machine tool industry, the bearing industry, the bent axle industry, the engine industry and the steel rolling industry is improved.

Description

technical field [0001] The invention relates to a polyurethane grinding wheel, which belongs to the technical field of grinding wheels. Background technique [0002] Grinding wheel, also known as bonded abrasive, is a bonded abrasive with a certain strength by pressing ordinary abrasives into a certain shape (mostly round, with a through hole in the center) by a binder. It is generally composed of abrasives, binders and pores. These three parts are often called the three elements of bonded abrasives. According to different classifications of bonds, the common ones are ceramic (bond) grinding wheels, resin (bond) grinding wheels, and rubber (bond) grinding wheels. Grinding wheel is the most widely used type of grinding tool. It rotates at high speed when used, and can be used for rough grinding, semi-finishing and Fine grinding as well as grooving and parting off etc. Grinding wheel is the most important type of abrasive tool in grinding process. The grinding wheel is a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/28B24D3/34B24D18/00
CPCB24D3/28B24D3/34B24D18/0009
Inventor 刘玉举
Owner 龙口东润砂轮有限公司
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