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连杆齿形的强力磨削是指在连杆体与大端盖的接合面上,用成形砂轮把平面加工成齿形面。采用强力磨削工艺具有加工效率高、齿形的光洁度好、两者接触面积达到70％以上等优点。我厂生产的12V240型柴油机连杆的材料为42CrMo合金钢,调质后硬度为HB270～300。连杆体与大端盖的结合面采用60°齿形定位连接,齿距为6±0.025毫米、齿深为3.5毫米、齿根的R为0.6毫米,光洁度要求为▽6,接触面积要求达到70％以上。该齿形面长期以来一直用铣削工艺加工,虽然经过多次改进,
The strong grinding of the connecting rod tooth shape means that the surface of the connecting rod body and the large end cap are machined into the tooth surface by the forming grinding wheel. The use of powerful grinding process with high processing efficiency, good tooth profile, the contact area between the two reached more than 70% and so on. The 12V240 diesel engine connecting rod produced by our factory is made of 42CrMo alloy steel and the hardness after quenched and tempered is HB270 ~ 300. Connecting rod body with a large end cover with 60 ° tooth shape positioning connection, pitch 6 ± 0.025 mm, tooth depth 3.5 mm, root R of 0.6 mm, the finish required ▽ 6, the contact area required to reach More than 70%. The toothed surface has long been used milling process, although after many improvements,