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秦川机床厂于1982年3月试制成功成形磨削渐开线圆柱直齿齿轮的YS7332型成形砂轮磨齿机。从鉴定情况来看,该机床体现了一定的设计水平,成形砂轮修整器的设计也有可取之处。该修整器从适应加工规格及齿形要求出发,采用4∶1放大的典型四连杆机构,但比诸国内外同类型修整器有自己的特点。为了说明它的特点,有必要简述成形砂轮磨齿机的一般四连杆机构成形砂轮修整器所存在的问题:
Qinchuan Machine Tool Factory in March 1982 successfully trial-shaped grinding involute cylindrical spur gear YS7332-shaped grinding wheel grinding machine. From the identification of the situation, the machine reflects a certain level of design, forming wheel dresser design also has merit. The dresser to adapt to processing specifications and tooth profile requirements, using 4: 1 magnification of the typical four-bar linkage, but than the same type of dresser at home and abroad have their own characteristics. In order to explain its characteristics, it is necessary to briefly describe the problems existing in the forming wheel dresser of the general four-bar linkage forming wheel grinding machine: