Analysis of structures of drill-bit roller cutters with helical cutting equipment
The analysis of existing designs of drill-bit roller cutters with helical cutting devices is performed. The operational principles of the most interesting design solutions are described. The advantages of previously developed helical gear devices as compared with the standard spur-type equipment of drill-bit roller cutters are substantiated. Some disadvantages of both the designs and manufacturing technologies of the existing drilling tools with helical devices are identified. The most rational technical solutions used in the design of cone drill-bit roller cutters with helical devices that allow improving of drilling tools reliability as well as effective influencing on drilling basic parameters are determined. The analysis of designs of the most illustrative specimen of drill-bit roller cutters with helical devices, conducted in the paper, allowed making the conclusion that usage of this type of the equipment is highly prospective, but at present there exists no structures, maximally revealing the potential of this type of the equipment.