一、缓进磨削工艺随着精铸、精锻件水平的提高,加工余量日益减少。在出现少余量或无余量精铸、精锻时就提出了能否将毛坯一次磨削成型的设想。在六十年代中期和后期,相继出现了高速磨削和强力磨削。高速磨削,磨轮圆周速度达到50～60米/秒,金属去除率也很高。但人们发现高速磨削有几个不易解决的问题,如高速磨削耐热合金时易产生烧伤或表 First, slow grinding process As the casting, forging the level of improvement, reducing the allowance. In the presence of surplus or no margin casting, precision forging put forward the idea of ​​whether to grind the rough shape once. In the mid and late 1960s, high-speed grinding and intensive grinding successively occurred. High-speed grinding, grinding wheel circumference speed of 50 to 60 m / s, the metal removal rate is also high. However, it has been found that high-speed grinding has several problems that are not easily solved, such as high-speed grinding heat-resistant alloys prone to burn or table