The new valve stem processing technology adopts self-made forging and cold extrusion technology, which has high thread strength and precision. The concentricity of the thread part and the polishing rod part is the same, which overcomes the problems of easy deformation, easy deformation and easy damage in the traditional non-chip thread rolling. After the polishing rod parts adopt this technology, the precision reaches the mirror effect, the opening and closing is easier, and the sealing performance is good. In addition, the key components of the stem are molded at one time through CNC, tensile and torsional sealing, ensuring the quality of the product components in many ways.

First of all, the valve stem is formed by self-made forging and cold extrusion, which has high thread strength and accurate precision, which completely solves the problem of inaccurate thread accuracy when the traditional valve stem thread uses a spiral flying knife.

The second is that the concentricity of the thread part and the polishing rod part is the same, thus overcoming the long-standing difficulties in the domestic thread rolling process. The traditional non-chip wire rolling is easy to twist, deform and damage the wire rolling die.

Third, the polishing rod parts use technical precision to achieve the mirror effect, easy to open and close, and good sealing performance, which solves the problems of low precision and time-consuming of the original polishing rod grinder.

Fourth, through the numerical control technology to shape the inverted parts at one time, the precision is high, and the handstand sealing performance is good. It also eliminates the fact that the original handstand part uses two fixtures reverse flip seal, the concentricity is poor, and the inverted seal is easy to leak. The end is separated by a milling machine. Dial-up indexing problems, slow processing as well as many processes and time-consuming.