Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for reducing resin diamond grinding wheel bubble and raising its service life

A diamond grinding wheel and resin technology, applied in metal processing equipment, grinding equipment, grinding/polishing equipment, etc., can solve the problems of grinding wheel quality degradation

Inactive Publication Date: 2005-07-20
WUHAN UNIV OF TECH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, it is ignored that during the use of the resin diamond grinding wheel, the instantaneous temperature on the surface of the grinding wheel reaches a high temperature of about 600 ° C, which is enough to cause the phase structure of the powder filler to change, resulting in a decrease in the quality of the grinding wheel

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The powder filler chromium oxide and zinc oxide are subjected to high-temperature calcination heat treatment. First, the chromium oxide and zinc oxide are calcined at 550°C for 2 hours, and then cooled to room temperature with the furnace to obtain the surface-activated powder filler. The phenolic resin diamond grinding wheel is produced with high-temperature calcined and non-high-temperature calcined powder fillers. The ambient humidity of the grinding wheel is about 80%. In order to conduct a comparative study, except for the different powder fillers, the formulations and The production process is exactly the same, and the formula of the grinding wheel is as follows (calculated by weight percentage, excluding the weight of diamond): phenolic resin powder: 34.8%, graphite: 5.5%, copper powder: 17.9%, chromium oxide: 27.8%, zinc oxide: 14.0 %. The pressing temperature is 190° C., and the temperature and time of secondary curing are 170° C. and 15 hours, respectively. 2...

Embodiment 2

[0037] The selected resin is polyimide resin powder, except that the resin powder used is different, other such as powder filler chromium oxide and zinc oxide for high-temperature calcination activation heat treatment process and conditions, grinding wheel formula and production process are all the same as in Example 1. In each of the 20 grinding wheels produced, the polyimide resin diamond grinding wheel produced with high-temperature calcined powder filler as raw material did not find any grinding wheel with air bubbles; The imide resin diamond grinding wheel found that there were bubbles in 3 grinding wheels; the grinding test results showed that: the polyimide resin diamond grinding wheel produced with high-temperature calcined powder filler as raw material had an average grinding wheel wear ratio Ms of 0.0023329, However, the polyimide resin diamond grinding wheel produced with uncalcined powder filler as raw material has an average wear ratio Ms of 0.0024335. After the po...

Embodiment 3

[0039]The powder filler chromium oxide and zinc oxide are subjected to high-temperature calcination heat treatment. First, the chromium oxide and zinc oxide are calcined at 300 ° C for 4 hours, and then cooled to room temperature with the furnace to obtain the surface-activated powder filler. Except that the temperature and time of high-temperature calcination heat treatment are different, other processes and conditions, grinding wheel formula and production process of powder filler chromium oxide and zinc oxide for high-temperature calcination activation heat treatment are exactly the same as in Example 1. In each production of 20 grinding wheels, the phenolic resin diamond grinding wheel produced with high-temperature calcined powder filler as raw material did not find the occurrence of bubbles; on the contrary, the phenolic resin diamond grinding wheel produced with uncalcined powder filler as raw material It was found that there were bubbles in 2 grinding wheels; the grindi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The method for reducing resin diamond grinding wheel bubble and raising its service life includes the following steps: making high-temp. calcination activation heat-treatment of powder filler, cooling to room temp., adopting conventional powder hot-press forming process to make production of resin diamond grinding wheel, its heat treatment temp. is 300-850 deg.C, time is 1-6 hr, atmospere is air and pressure is normal pressure. Said invented high-temp. calcination heat treatment can remove physisorption water and chemically bound water from powder filler, at the same time can make powder filler form stable phase structure, and form fresh surface on the surface of filler granules so as to reduce formation of bubble in the course of production and use of resin diamond grinding wheel.

Description

technical field [0001] The invention relates to an improved process for producing a resin diamond grinding wheel, in particular to a method for reducing air bubbles of the resin diamond grinding wheel and improving its service life. Background technique [0002] Since Bakelite obtained the first phenolic resin finger diamond grinding wheel patent (EP1,537,454) in 1926, with the development of the artificial diamond industry and the wide application of resin grinding wheels, resins for resin diamond grinding wheels have also achieved rapid development, and successively appeared Epoxy resin, urea-formaldehyde resin, polyester, polyamide plastic, etc. However, practice has proved that these resins are not suitable for the manufacture of resin diamond grinding wheels. The disadvantages are that these resins have poor heat resistance. When the temperature exceeds 150 ° C, the mechanical strength is low and the quality of the grinding wheel is not high. The bonding agent used in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B24D18/00
Inventor 余家国程蓓赵修建
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com