众所周知,键联接在生产上广泛应用,尤其是平键联接,更是量大面广。但要在孔内加工高精度键槽并非易事,而且现有传统加工方法均有不足。例如,用插削法需要专用机床,用刨削法或电加工效率均较低,用拉削法拉刀制造成本高,用铣削法无法在小内孔内完成等等。更为重要的是,以上诸法一般都只能在直通孔内加工键槽,而对盲孔内的键槽或有障碍台肩的键槽则都难有作为,不能满足生产发展的需要。对于一般性的中小企业也不可能 As we all know, the key link widely used in the production, especially flat key connection, it is a large amount of information. However, it is not easy to process high precision keyway in the hole, and the existing traditional processing methods are not enough. For example, the use of insert-cut method requires a dedicated machine, planing or electrical processing efficiency are lower, with broaching broach manufacturing costs, with the milling method can not be completed within the small bore and so on. More importantly, most of the above-mentioned laws generally only work with keyways in through-holes, while those with keyways in blind holes or with keyed shoulders are hard to fulfill and can not meet the needs of production development. For the general SMEs can not