磨粒参数优化对钎焊金刚石磨抛盘磨抛性能的影响

Influences of abrasive parameter optimization on grinding properties of brazed diamond grinding disc

为解决传统钎焊金刚石磨抛盘在磨抛高强度钢时存在的磨削效率低、寿命短,磨粒易磨损,切屑易堵塞磨削面等问题,对金刚石磨粒的品级、粒度、配比等参数进行优化设计,并讨论了新型磨抛盘磨粒参数匹配机理。采用外径125 mm的新型钎焊金刚石磨抛盘对牌号为AH36的高强度钢进行磨抛试验,通过测量单位时间内金属去除量与纯磨削噪声来评价磨粒参数对磨抛效率与寿命的影响。结果表明:磨粒粒度越大,磨抛噪音愈大,磨削效率越高;磨粒品级高,磨削效率高;高品级大粒度与中低品级小粒度搭配可得到高散热空间,较高的磨抛效率,较长的磨抛寿命。

In order to solve the problem of low grinding efficiency, low tool life, easy abrasive wear and chip clogging of traditiorlal brazed diamond grinding disc in grinding high strength steel, the parameters of diamond abrasive grades, size and ratio were optimized and the matching mechanism of abrasive parameters was discussed. The grinding tests were operated on high-strength steel AH36 by a new brazed diamond grinding disc with 125 mm outside diameters. By measuring the metal removal rate and pure grinding noise, the influences of grinding parameters on grinding efficiency and tool life was evaluated. The result shows that larger grit size causes greater grinding noise and higher grinding efficiency; higher abrasive grade brings about higher grinding efficiency; the abrasive collocation of high-grade large size with low-grade small size can obtain higher heat dissipation space, higher grinding and polishing efficiency and longer tool life.