滚压加工,是一种无切屑的压力光整加工,可使工件的疲劳强度,耐磨性和耐腐蚀性均有显著改善。我厂产品300g立式注射机的主体机筒,其内孔最后工序采用笔者设计的可调内孔滚压头(以下简称滚压头)进行滚压加工,使内孔粗糙度由原Ra3.2降至Ra0.4或Ra0.8,椭圆度≤0.01mm现将其结构介绍如下: 滚压头由7种零件组成见图,滚头体1材料40Cr调质;垫块2,材料T10,淬硬,并磨两面至Ra0.08;保持盖3是为了防止钢球掉出;钢球4为φ20钢球;螺栓6,材料T10,顶端局部淬硬并研磨至Ra0.08。滚压头外露两钢球(两工作钢球)的尺寸可调,调整范围约4mm,可用千分尺测量所选择的滚压过盈量,螺栓旋入,尺寸增大,旋出尺寸减小.滚压头两工作钢球与孔壁接触施压时,两钢球受力则自动平衡,因此能 Rolling is a chipless pressure finishing process that provides significant improvements in fatigue strength, wear resistance, and corrosion resistance. I plant the product 300g vertical injection machine barrel, the inner hole of the final process using the author’s adjustable inner hole rolling head (hereinafter referred to as the rolling head) for rolling processing, the hole roughness from the original Ra3. 2 to Ra0.4 or Ra0.8, ellipticity ≤ 0.01mm Now the structure is introduced as follows: Rolling head consists of seven kinds of parts shown in Figure, the body of a rolling body 40Cr quenched and tempered; pad 2, the material T10, Hardened, and ground both sides to Ra0.08; to keep the cover 3 is to prevent the ball from falling out; ball 4 φ20 ball; bolt 6, material T10, the top of the local hardening and grinding Ra0.08. Rolling head exposed two steel balls (two work ball) adjustable size, adjust the range of about 4mm, can be measured with a micrometer selected rolling interference, screwed in, the size increases, screw out size decreases. Indenter work two holes and hole wall contact pressure, the two steel ball is automatically balanced by the force, it can