The invention relates to a processing method of a composite slow-wave tube shell. The composite slow-wave tube shell comprises docking pole shoes, pole shoes, spaced rings, transfer pole shoes, an adapter and a positioning core rod. The processing method comprises the following steps: mounting and welding the docking pole shoes, the pole shoes, the spaced rings, the transfer pole shoes and the adapter, and then forming an inner hole processing channel of the tube shell; linearly cutting and processing the inner hole processing channel to the honing size of an inner hole channel, and forming an inner hole honing channel; honing the inner hole honing channel to reach a design size of the inner hole channel; testing; carrying out oil removal cleaning; performing an air-tightness test. According to the method, an advanced slow-wire cutting processing technology and an inner circle honing process are used for processing the inner hole channel of the composite slow-wave tube shell for a helix traveling-wave tube. The method disclosed by the invention has the advantages of high inner-diameter precision of the processed tube shell, good inner surface smoothness, high concentricity, low air leak rate of the processed composite tube shell, and the like.

Processing method of composite slow-wave tube shell

The invention provides a thin-walled elongated pipe member whole precision processing method. The thin-walled elongated pipe member whole precision processing method comprises the following steps of S1, blanking; S2, hot working; S3, rough turning of the end face and the outer circle; S4, drilling and boring of an inner hole; S5, honing of the inner hole; S6, semi-finish turning and finish turningof the outer circle; S7, fine grinding of the outer circle; S8, micro-extrusion correction; S9, finish turning of the end face; and S10, inspection and packaging. By means of the method, the whole precision machining of thin-walled elongated pipe members which are made of austenitic stainless steel materials, have the maximum length being 575 mm, have the minimum pipe diameter being 24 mm, have the maximum draw ratio being 24 and have the thinnest wall thickness being 0.3 mm can be achieved, and the inner hole and outer circle precision reaches the IT5 stage, the coaxiality reaches 0.025 mm,the straightness reaches 0.025mm, the surface roughness reaches Ra0.8, and the method is a high-efficiency, precise and low-cost thin-walled elongated pipe member processing method.

Thin-walled elongated pipe member whole precision processing method

The invention discloses a method for accurately machining a deep hole. The method comprises the following steps of 1, drilling a metal material by taking the axis of a designed deep hole as the centerto obtain the metal material with a threading hole; 2, carrying out wire cutting treatment on the metal material with the threading hole by taking the axis of the designed deep hole as the center, and obtaining the metal material with a guide hole; and 3, carrying out deep-hole accurate machining on the metal material with the guide hole along the guide hole through a drill bit, and obtaining themetal material with the precisely machined deep hole. According to the method, the threading hole is machined in the metal, it is guaranteed that a wire electrode for electric spark wire cutting cansmoothly penetrate through the threading hole, the guide hole with the perpendicularity meeting the requirement is machined through wire cutting, the advancing path of the drill bit is kept parallel to the guide hole, the deep hole is machined by the drill bit, and deep-hole accurate machining is achieved, the method is controllable in precision and extremely high in success rate, and the roughness and the form and location tolerance of the machined deep hole completely meet the design requirements.

Method for accurately machining deep hole

The invention relates to a method for producing a small-diameter TA18 titanium alloy seamless tube. The method comprises the following steps of: step a. preparing a small-diameter TA18 titanium alloyround rod (1); step b. drilling a perforative threading hole (2) on one end surface of the TA18 titanium alloy round rod (1); step c. inserting a wire-cutting wire into the threading hole (2), and cutting out a TA18 titanium alloy tube blank (11) by taking the distance from the wire-cutting wire to the center of the TA18 titanium alloy round rod (1) as the radius; step d. processing the outer circle of the TA18 titanium alloy tube blank (11); and step e. performing cold rolling on the TA18 titanium alloy tube blank (11) on a cold reducing mill to form the TA18 titanium alloy tube finished product. The method has a short production process cycle, a high yield rate, and few processes; the sizes and various properties of the finished products are uniform and controllable; and a cylinder cut out by wire cutting can also be used for producing a TA18 titanium alloy seamless tube with the relatively small diameter. The method provides a new choice for the production of titanium seamless tubeswith relatively small diameters, and has broad application prospects.

Method for producing small-diameter TA18 titanium alloy seamless tube

The invention provides a hole opening method for a thin-walled rare metal pipe. The hole opening method comprises the steps as follows: a steel pipe is nested in a rare metal pipe after the rare metal pipe is heated, then the rare metal pipe nested with the steel pipe is subjected to hole opening processing, after hole opening, the whole rare metal pipe nested with the steel pipe is subjected to annealing, the rare metal pipe and the steel pipe are separated after annealing, and the hole-opened rare metal pipe is obtained. According to the method, the problems that the thin-walled rare metal pipe is prone to deformation in a clamping process during hole opening, large-scale hole opening is difficult and residual stress after hole opening is overlarge are effectively solved, and the method is particularly applicable to rare metal pipes with the higher radius-thickness ratio and the larger opening number.

Hole opening method for thin-walled rare metal pipe

The invention belongs to the technical field of molybdenum alloy machining, and discloses an inner hole machining method for a molybdenum alloy thin-walled long pipe of a reactor. The method is a combined machining method in which gun drilling, linear cutting and honing are organically combined, and comprises the following steps: (1) outer circle reference machining of a molybdenum alloy bar, (2) gun drilling of a threading hole, (3) linear cutting of an inner hole and (4) honing finish machining of the inner hole. The linearity of the machined inner hole of the molybdenum alloy thin-walled long pipe is higher than 0.03 mm, the cylindricity of the inner hole is higher than 5 [mu]m, and the roughness of the inner hole is better than 0.2 [mu]m.

Wang Zhendong

Papers

Inner hole machining method for molybdenum alloy thin-walled long pipe