汽车附件——气泵缸盖(图1),材质是铝合金。其内螺纹M22×1.5经常滑扣,产生漏气而不能使用。为使报废的气泵缸盖复活,我们进行了气泵缸盖内螺纹的修复工作,其工艺如下:1.把气泵缸盖原内螺纹扩大为M 25×1.5。2.配制螺纹套(图2),材料A_3或黄铜。螺纹套应先加工内螺纹M22×1.5,再加工外 Auto Accessories - cylinder head pump (Figure 1), the material is aluminum alloy. Its internal thread M22 × 1.5 often slip, resulting in leaks and can not be used. In order to revitalize the scrapped cylinder head, we carried out the repair of the internal thread of the cylinder head of the gas pump. The process is as follows: 1. Expand the original internal thread of the cylinder head of the air pump to M 25 × 1.5.2. , Material A_3 or brass. Threaded sleeve should be processed first M22 × 1.5, then processing