最近水泵外殼加工廠批量生產水泵外殼時，發現水泵外殼表面有些劃痕，不知道是什么原因造成的。經過分析，發現是刀具的磨損導致的。水泵外殼表面劃痕主要有兩個原因：

　　1、水泵外殼表面材料較軟，刀具磨損較快。

　　2、水泵外殼表面的硬度較低，易產生劃痕。

　　針對上述兩個原因，可以采取以下措施加以改善：

　　1、使用耐磨材料的刀具。這樣可以減少刀具的磨損，延長刀具的使用壽命。

　　2、調節刀具的磨削參數。通過調節刀具的磨削參數，可以有效提高刀具的磨損耐久性。

　　如果以上措施仍無法改善水泵外殼表面劃痕的現象，建議采用防止刀具磨損的措施。比如，可以采用隔離膜來防止刀具與水泵外殼表面直接接觸。

　　The recent processing of water pump casing, found that the surface of water pump casing have some scratches, don't know what cause. After analysis, it is found that the tool wear caused by. The surface of water pump casing scratches have two main reasons:

　　1, the surface material of water pump casing is soft, tool wear quickly.

　　2, the surface hardness of water pump casing is low, easy to scratch.

　　For the above two reasons, can take the following measures to improve:

　　1, the use of wear-resistant material tools. This can reduce the tool wear, prolong the service life of the tool.

　　2, adjust the grinding parameters of the tool. Through adjusting the grinding parameters of the tool, can effectively improve the wear resistance of the tool.

　　If the above measures can not improve the phenomenon of surface scratches of water pump casing, it is recommended to use the tool to prevent wear measures. For example, can use the isolation membrane to prevent the tool and the surface of water pump casing contact.