碾环是指通过专用设备碾环机生产不同直径的环形零件，主要用来生产汽车轮毂、火车车轮等轮形零件。特种锻造包括辊锻、楔横轧、径向锻造、液态模锻等锻造方式，这些方式都比较适用于生产特殊形状的零件。

Roller ring refers to the production of circular parts with different diameters through the roller ring machine of special equipment, which is mainly used to produce wheel hub, train wheel and other wheel shaped parts. Special forgings include roll forging, cross wedge rolling, radial forging, liquid forging and so on. These methods are suitable for producing parts with special shape.

选择好的锻件产品跟锻造工艺或者锻造厂家肯定是有关系的，现在有越来越多的锻件厂走向市场，对此，用户挑选锻件产品的难度就增加了。如果对锻件缺乏***的认识，那么，在选择的时候就会多很多顾忌。

The selection of good forging products is closely related to forging process or forging factories. Now more and more forgings factories are going to the market. Therefore, users' difficulty in selecting forgings is increasing. If the forgings are lack of professional knowledge, there will be a lot of scruples when choosing.

在现代工业生产中，机器自由锻已成为锻造生产的主要方法，在重型机械制造中，它具有特别重要的作用。而产生的锻件形状和尺寸主要由操作工的技术水平决定。

In modern industrial production, machine free forging has become the main method of forging production, and it plays a particularly important in he***y machinery manufacturing. The shape and size of the forgings are mainly determined by the technical level of the operator.