螺纹环规是我厂的主要产品。过去用来研磨螺纹环规的研磨杆总是因为消耗太快而供应不上。由于研磨杆的消耗太快,浪费了很多的铸铁料和工时。在技术革命运动中,王福印同志改进成功一种六瓣可调节研磨杆,克服了研磨杆消耗太快的缺点。六瓣可调节研磨杆的结构和使用结构很简单,如附图,由心杆1、调节螺帽2、研磨瓣3和调节螺帽4组成。这种研磨杆对于ф30～250公厘(或再大一些)的螺纹环规和圆孔都可以使用。使用时首先将螺帽2、4和研磨瓣3装入心杆1上,然后将心杆1带锥度 Thread ring is the main product of our factory. Grinding rods used to grind thread ring gauges are always out of supply because they are consumed too quickly. As the consumption of grinding rod too fast, a lot of waste of cast iron materials and working hours. In the technical revolution movement, Comrade Wang Fuyin succeeded in improving a six-way adjustable grinding rod, which overcomes the disadvantage that the grinding rod consumes too fast. The structure and use structure of the six-blade adjustable grinding rod is very simple, as shown in the figure, composed of a mandrel 1, an adjusting nut 2, a grinding petal 3 and an adjusting nut 4. This grinding rod for ф30 ~ 250 mm (or larger) thread ring and hole can be used. When used first nut 2, 4 and grinding flap 3 mounted on the mandrel 1, and then the mandrel 1 taper