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为了不断提高WY60A 挖掘机的整机装配质量,我们主要采取了以下几项措施:1.卡套式管接头的改进先导操纵系统压力3MPa,采用卡套式连接结构。常有漏油现象,影响了整机质量。原因是拧紧过程中产生轴向力和径向力,迫使卡套唇口卡入钢管圆周壁,形成密封条件。所用的两种无缝钢管中,(?)10×1的一种壁薄,承受不了螺母旋紧时的径向分力,引起管壁变形(图1a),使卡套唇口与钢管无法形成密封条件。为
In order to continuously improve the overall assembly quality of the WY60A excavator, we have mainly adopted the following measures: 1. Improvement of the card-type pipe fittings The pressure of the pilot control system is 3 MPa, and a card-type connection structure is adopted. Oil leakage often affects the quality of the whole machine. The reason is that during the tightening process, axial force and radial force are generated, forcing the sleeve lip into the circumferential wall of the steel pipe to form a sealing condition. Among the two types of seamless steel tubes used, a thin wall of (?)10x1 can not withstand the radial force when the nut is tightened, causing deformation of the tube wall (Fig. 1a), making the sleeve lip and steel tube incapable of fitting. Form a sealed condition. for