Hot jacket type hard alloy cutting knife

The utility model discloses a shrinkage fit type hard alloy cutting knife which comprises a knife body and a cutting assembly, one end face of the knife body is provided with a hole, the cutting assembly comprises a hard alloy rod and a cutting blade arranged on the hard alloy rod, and the hard alloy rod is connected with the hole in an interference fit mode. Compared with a common solder welding type cutting knife, the shrinkage fit knife body is composed of the knife handle single body, precision reduction caused by part combination is avoided, high temperature of a solder melting point is avoided, the cutting edge is clamped in a metal shrinkage mode, precision stability is high, and the cutting knife is convenient to use. The shrinkage fit cutter has high clamping torque, high bending rigidity and high dynamic balance. 本实用新型公开了一种热套式硬质合金开料刀，包括刀体、切削组件，刀体一端面设有孔，切削组件包括硬质合金棒和设在硬质合金棒上的切削刀刃，硬质合金棒与孔通过过盈配合连接。本实用新型与一般的焊料焊接式开料刀相比，热套刀体由于是由刀柄单体构成，没有零件组合带来的精度降低，也没有焊料熔点的高温，并且是依靠金属的收缩方式夹持切削刀刃，精度稳定性高，热套刀具具有较高的夹持扭矩、高弯曲刚性及高