长期以来,安全阀阀芯阀座结合面的研磨修理大多是在专用研磨工具上用研磨沙(膏)进行研磨的。这种修理方法有以下不足之处: ①研磨工具材质和光洁度要求很高。②研磨修理技术难度大,要求高。③工效慢。④在研磨时,研磨结合面两侧的研磨沙容易脱落,研磨结束后会使结合面形成中间凹两侧凸的形状,影响密封效果如图1所示。 For a long time, most of the grinding and repairing of the valve seat and valve seat of the safety valve are lapped with grinding sand (paste) on special grinding tools. This method of repair has the following deficiencies: ① grinding tool material and finish requirements are high. ② grinding repair technology is difficult, demanding. ③ slow efficiency. ④ When grinding, the grinding sand on both sides of the bonding surface is easy to peel off. When the grinding is finished, the bonding surface will form a convex shape on both sides of the center concave, affecting the sealing effect as shown in FIG. 1.