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一、问题的提出随着液压技术的发展,使用工作压力愈来愈高,目前最高工作压力已达450公斤力/厘米~2。压力的提高,对液压元件材料、强度、质量的要求也随之提高。这对液压件的设计者和制造者来说,合理地进行强度安全设计及质量控制,是十分重要的。例如近几年来一些工厂生产的内曲线液压马达,其中一个关键件——内曲线形的定子“废品率”很高(上海某厂生产的内曲线马达
First, the issue raised With the development of hydraulic technology, the use of higher and higher working pressure, the maximum working pressure has reached 450 kg / cm ~ 2. Pressure increases, the hydraulic components of the material, strength, quality requirements also will be increased. It is very important to designers and manufacturers of hydraulic components to reasonably conduct strength and safety design and quality control. For example, some factories in recent years, the production of internal curve hydraulic motor, one of the key pieces - internal curved stator “rejection rate” is very high (Shanghai factory production curve motor