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　　水表是一种普遍使用的计量设备，用于监测自来水、污水、工业废水、汽车冷却水等管道输送中的流量。水表外壳是水表的主要结构部件，可以把水表分为两大类：一类是全封闭式水表，其外壳中有密封胶密封，不会引起水雾腐蚀，而结构简单，成本较低，适用于普通自来水管道监测；另一类是半封闭式水表，其外壳需要配合工业气体进行加压封闭，适用于监测含有颗粒、水雾、有害气体的工业废水、污水、汽车冷却水等管道。

　　无论是全封闭式水表还是半封闭式水表的外壳，其材料都可以根据水质的不同而选择，一般来说，如果水质较差，外壳材料应该选择钢板，如果水质较好，外壳材料应该选择不锈钢。半封闭式水表外壳的典型材料是钢板加工成的，而其制造工艺也比较简单。但是半封闭式水表外壳需要进行压力封闭，否则水雾和气体会导致内部部件的腐蚀，使水表的使用寿命大大缩短。

　　对于水表外壳加工工艺，根据水表的不同类型和使用要求，可以采用不同的工艺方法，进行水表外壳的加工。如果要制造一个全封闭式水表外壳，可以采用钣金加工、冲压加工等方法；如果要制造一个半封闭式水表外壳，可以采用锻造或锻压加工方法；如果要制造一个普通水表外壳，则可以采用注塑或铸造加工方法。

　　目前市场上使用最广泛的水表外壳加工方法是钣金加工。钣金加工又称为冲压加工，是一种采用冲床或其他机床将工件的表面压到所需形状的加工方法。钣金加工相对于其他加工方法来说，具有成本低、速度快、工艺简单的优点。一般来说，采用钣金加工制造水表外壳的成本大约是其他加工方法的一半。因此，钣金加工是制造水表外壳的首选方法。

　　中国现在发展迅速，水表制造业也在不断发展壮大，水表厂家想要在市场上占据一席之地，就必须不断提高产品质量，提高水表外壳加工水平。

　　Water meters are a commonly used measuring device to monitor the flow of water, wastewater, industrial wastewater, automotive cooling water and other pipeline transmission. The water meter shell is the main structural component of the water meter, which can be divided into two categories: one is the fully sealed water meter, which has sealing glue sealing in the shell, will not cause water mist corrosion, and the structure is simple, the cost is low, suitable for ordinary water pipeline monitoring; The other is a semi-closed water meter, which requires pressure sealing with industrial gas in the shell, and is suitable for monitoring industrial wastewater, sewage, automotive cooling water and other pipelines with particles, water mist, harmful gases.

　　Whether it is a fully sealed water meter or a semi-closed water meter, the material of the shell can be selected according to the different water quality. Generally speaking, if the water quality is poor, the shell material should be steel plate, and if the water quality is good, the shell material should be stainless steel. The typical material of the semi-closed water meter shell is processed by steel plate, and the manufacturing process is also relatively simple. However, the semi-closed water meter shell needs to be sealed under pressure, otherwise the water mist and gas will cause corrosion of the internal components and greatly shorten the service life of the water meter.

　　For water meter shell processing technology, according to the different types of water meters and use requirements, different processing methods can be used for water meter shell processing. If you want to manufacture a fully sealed water meter shell, you can use sheet metal processing, stamping processing, etc.; if you want to manufacture a semi-closed water meter shell, you can use forging or forging processing; if you want to manufacture an ordinary water meter shell, you can use injection molding or casting processing.

　　The most widely used processing method for water meter housings on the market is sheet metal processing. Sheet metal processing is also called stamping processing, which is a processing method that uses press or other machine tools to press the surface of the workpiece into the required shape. Sheet metal processing has the advantages of low cost, fast speed and simple process compared with other processing methods. Generally speaking, the cost of manufacturing water meter housings by sheet metal processing is about half of that of other processing methods. Therefore, sheet metal processing is the first choice for manufacturing water meter housings.

　　Now China is developing rapidly, the water meter manufacturing industry is also growing rapidly, water meter manufacturers want to occupy a place in the market, we must continuously improve product quality, improve water meter shell processing level.