Toughening and Straightening Technology of Gun Drilling Drill Rod for Deep Hole Processing

Abstract

The present invention relates to the technical field of processing methods for deep hole processing equipment, in particular to the process of toughening and straightening gun drill rods for deep hole processing, comprising the following steps: 1) material selection, pipe making and forming, selecting high-quality alloy steel, tool steel or Carburized steel, processed into a deep hole processing gun drill pipe before heat treatment; 2) heat treatment strengthening and toughening and straightening integration, the deep hole processing gun drill pipe before heat treatment is hung vertically on the tooling, deep The counterweight is mounted on the bottom end of the hole processing gun drill drill pipe for carburizing, quenching, self-alignment of the counterweight or quenching and self-straightening; 3) tempering, straightening, and cooling. Compared with the prior art, this The invention uses high-quality alloy steel, tool steel or carburizing steel as raw materials, and through heat treatment in a protective gas furnace, vacuum furnace, and high-frequency furnace, under the gravity of the counterweight, self-alignment or carburizing and quenching of carburizing steel improves The carbon content is lowered, the toughness is strengthened; the heat treatment is strengthened and toughened and straightened, and the tempering process is self-aligned.

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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