Pre-grinding is consisted of cycle pre-grinding, hybrid grinding, and combination grinding and semi-finished grinding.
预粉磨分为循环预粉磨、混合粉磨、联合粉磨和半终粉磨。
2
As for flat roll of F4 ~ F6 stands, their pre-grinding crowns were optimized and the flatness of strips was greatly improved.
对F4 ~ F6机架平辊的预磨凸度进行优选，明显改善了带钢的平直度。
3
Gives a new method which designs tooth forms of pre-grinding hob according to thepartical demands on hob of gear, and designs a kind of pre-grinding hob used in high-speed traction gears.