钣金电焊手锤是钣金加工中常用的工具之一，所以钣金工对手锤不但会使用，而且也应该会维护。当锤柄装入锤头时，锤柄中心线与锤头中心线要垂直，且柄的比较大椭圆直径方向要与锤头中心线一致。为了使锤头安装紧固不松动，避免锤头脱落，必须用金属楔子或者木楔子，打入锤柄内加以紧固。锤柄必须平整，锤面应光滑平坦。手柄不可当作撬棍和用以清理铁屑及砂粒。

　　在使用手锤时应注意如下几点安全事项：

　　(1)不适用锤柄楔子松动、脱落和有裂纹的手锤，以防锤头飞出造成事故。

　　(2)应避免锤柄、锤面有油。手出汗时，应擦干净后再握持手锤。

　　(3)在扬锤打击以前，必须注意四周，以免发生事故，并酗洒和疲劳操作锤头正面对人。

Sheet metal welding hammer is one of the commonly used tools in sheet metal processing, so sheet metal workers not only can use the hammer, but also should be able to maintain it. When the handle is installed into the hammer head, the center line of the handle shall be vertical to the center line of the hammer head, and the direction of the maximum elliptical diameter of the handle shall be consistent with the center line of the hammer head. In order to make the hammerhead not loose and avoid falling off, a metal wedge or a wood wedge must be used to drive into the handle of the hammer for fastening. The handle of the hammer must be flat and the surface of the hammer should be smooth and flat. The handle shall not be used as a crowbar or for cleaning iron and sand.

Pay attention to the following safety precautions when using the hammer:

(1) It is not suitable for hammers with loose handle wedge, falling off and crack to prevent accidents caused by hammer head flying out.

(2) Avoid oil on the handle and surface of the hammer. When your hands are sweating, wipe them clean before holding the hammer.

(3) Before striking with the hammer, it is necessary to pay attention to the surroundings to avoid accidents and prohibit the head of the hammer from facing people.