Strengthening, toughening and straightening process for deep hole machining gun-drill drill rod

Abstract

The invention relates to the technical field of machining methods of deep hole machining equipment, in particular to a strengthening, toughening and straightening process for a deep hole machining gun-drill drill rod. The process includes the following steps that 1) material selection, pipe manufacturing and forming are conducted, and superior alloy steel or tool steel or carburizing steel is selected and machined to form the deep hole machining gun-drill drill rod before heat treatment; 2) heat treatment strengthening, toughening and straightening are integrated, the deep hole machining gun-drill drill rod before heat treatment is vertically hung on a tool, a balance weight is hung at the bottom end of the deep hole machining gun-drill drill rod, and carburizing, quenching, balance weight automatic straightening or quenching and automatic straightening are conducted; and 3) tempering, straightening and cooling are conducted. Compared with the prior art, the superior alloy steel or tool steel or carburizing steel is selected as raw materials, through heat treatment of a controlled atmosphere furnace, a vacuum furnace and a high-frequency furnace and under the gravity effect of the balance weight, automatic straightening or carburizing steel carburizing and quenching are conducted, the carbon content is increased, and toughness is enhanced; heat treatment strengthening, toughening and straightening are integrated, and automatic straightening is achieved in the tempering process.

Description

technical field [0001] The invention relates to the technical field of processing methods for deep hole processing equipment, in particular to the strengthening and toughening and straightening process of gun drill drill rods for deep hole processing. Background technique [0002] The gun drill includes a drill drill, a drill rod and a cutter head. The specific structure is as attached figure 1 As shown, the deep hole processing technology is widely used in China's equipment manufacturing industry in China. In recent years, the manufacturing technology of domestic deep hole processing machine tools has been developed by leaps and bounds, and the supporting tools (gun drill for deep hole processing) , Under service conditions, it is required to have extremely high strength and toughness, and the processing hole diameter is various, and the manufacturing process is difficult to standardize; and the materials used in imported gun drill pipes are produced by domestic manufactur...

AI Technical Summary

Problems solved by technology

In recent years, the manufacturing technology of domestic deep hole processing machine tools has been developed by leaps and bounds, and the supporting tool (deep hole processing gun drill), due to the slender gun drill rod (diameter 3mm-40mm, length 500mm-3000mm) , Under service conditions, it is required to have extremely high strength and toughness, and the processing hole diameters are various, and the manufacturing process is difficult to standardize; and the materials used in imported gun drill pipes are produced by domestic manufacturers due to various specifications, low consumption, and cost. The mechanical properties of the drill pipe produced by the traditional process cannot meet the basic performance requirements of the parts; the heat treatment and straightening process can achieve the mechanical properties required by the parts and meet the technical requirements under service conditions, and the heat treatment deformation is absolute

Since the gun shaft is a special-shaped and slender part, a large amount of manpower and material resources are required to straighten it after heat treatment, and the straightness of the manual straightening gun shaft cannot meet the technical requirements of the design at all.

Therefore, at present, cutting tools basically rely on imports, and it is difficult to reduce processing costs and improve processing efficiency

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