CN103177913A - Mold and forming method for high-precision helical lines - Google Patents

Abstract

The invention discloses a mold and a forming method for high-precision helical lines, and belongs to the field of vacuum electronic devices. The mold comprises collets arranged at two ends of a precise helical line winding machine and a mandrel disposed in the middle. Two hollow mandrel fixing clamps are arranged at two ends of the mandrel and provided with clamp slots, and the mandrel is integrally welded with ends of the fixing clamps on two sides. The forming method includes six manufacturing steps from a to f. By the forming method, winding of the high-precision helical lines for space traveling-wave tubes can be achieved conveniently, winding yield is increased greatly, and winding tolerance is not higher than 2 micrometers. After being processed, the helical lines have higher surface smooth finish and better strength and flexibility, and are easy to assemble.

Description

Tool and mould and forming manufacturing method that the high-precision spiral line uses

Technical field

The invention belongs to the vacuum electron device field, specially refer to tool and mould and forming manufacturing method that the high band space travelling wave tube uses with the high-precision spiral line.

Background technology

The high band space travelling wave tube will be mainly used in interspace satellite communication future.The specific (special) requirements of using due to the space makes space travelling wave tube have to improve homogeneous tube efficient, to save power supply power consumption.It is reported, space travelling wave tube homogeneous tube efficient improves one percentage point, and whole space loading system energy consumption will obviously descend, and economic benefit is up to several ten million dollars.Therefore the efficient that improves space travelling wave tube is very important.

Determine that space travelling wave tube efficient key factor is that interaction efficiency is electronic efficiency, and in travelling wave tube, helix pitch precision directly has influence on the raising of electronic efficiency, because the helix size in the high band space travelling wave tube is very little, general pitch is less than 0.3mm; Interior diameter is less than 0.4mm, and overall diameter just requires helix pitch precision to be no more than 2um less than 0.5mm for obtaining higher electronic efficiency.

adopt traditional manufacture method, coiling core bar two ends directly are fixed in the winding equipment dop, as shown in Figure 1, due to the general coiling core bar of high-frequency space travelling wave tube diameter less than 0.4mm, for such coiling core bar, when the helix band rotates in core bar surface coiling, core bar is out of shape because of stressed, can't guarantee the normal coiling of helix, even complete reluctantly coiling, its product percent of pass is less than 1/10 also, and measure and find that the pitch precision surpasses 7um, for the high-frequency space travelling wave tube, usually helix pitch is less than 0.3mm, if precision surpasses the raising that 7um will have a strong impact on travelling wave tube electronic efficiency and homogeneous tube efficient, therefore requirements at the higher level have been proposed technical process.

This invention is for above problem, in order to guarantee the smooth coiling of fine pitch, high-precision spiral line, at first design and process specific winding mould, then mould and core bar are welded as a whole, adopt core bar and mould integral structure to complete the coiling of high-precision spiral line, the helix of completing for coiling needs the intensity, toughness of tight PROCESS FOR TREATMENT guarantee helix to carry out the assembling of helix.Therefore, this invention has very strong actual application value.

Summary of the invention

The technical issues that need to address of the present invention are, thereby, the coiling rate of finished products extremely low problem that affect space travelling wave tube manufacturing difficult with high-precision spiral wire-wound system for the high band space travelling wave tube, just need to improve helix winding rate of finished products and pitch precision, purpose of the present invention is exactly tool and mould and the forming manufacturing method that will provide a kind of high-precision spiral line to use, the PROCESS FOR TREATMENT that this method comprises helix winding and coiling after completing.

For realizing purpose of the present invention, the technical scheme of taking is as follows, the tool and mould that a kind of high-precision spiral line uses, comprise the dop that is placed in the accurate winding-machine bed of helix two ends, the core bar that is placed in the middle part, it is characterized in that, the core bar two ends are provided with the core bar stationary fixture of two hollow shape, and this fixture is provided with draw-in groove; Core bar and described stationary fixture both side ends are welded as a whole.

Process according to above-mentioned tool and mould coiling and shaping is characterized in that, operates by following process step:

A. the helix completed of coiling is placed in the hydrogen stove and finalizes the design, and is warming up to 1000 ℃, is incubated 20 minutes;

B. the rear screw line of finalizing the design is pulled down from core bar, carries out electrochemical polish, inside and outside two-way polishing, polishing time 20 seconds;

C. with polishing rear screw line annealing in hydrogen atmosphere in the hydrogen stove, the deoxidation layer, 800 ℃ of temperature are incubated 10 minutes;

D. many helixes are fixed on mould, adopt the ion sputtering mode at the helix copper coating, sputter thickness 5-10um;

E. sputter rear screw line hydrogen furnace treatment reason, 780 ℃ of temperature rise to 850 ℃, are incubated 15 minutes;

F. adopt specialized detection, measure helix pitch, tape thickness, bandwidth.

The invention has the beneficial effects as follows, the coiling of high band space travelling wave tube helix is achieved, and easy to operate, and the helix winding rate of finished products is greatly improved, and rate of finished products has surpassed 80%, and the coiling precision is not more than 2um; After the adopting process method was processed, the helix surface smoothness obviously improved, and helix intensity and pliability obviously improve, and are conducive to the assembling of helix.

Description of drawings

Fig. 1 is traditional helix winding core bar fixing means schematic diagram;

Fig. 2 is the present invention's core bar fixed mould schematic diagram used;

Fig. 3 is core bar and mould integral structure schematic diagram;

Fig. 4 is that the high-precision spiral wire-wound is made the total schematic diagram of shape;

Fig. 5 is the surperficial splatter metal material of helix mould therefor schematic diagram;

Fig. 6 is the tool and mould shaped structure schematic diagram that high-precision spiral line of the present invention uses.

Embodiment

With reference to Fig. 1, represent that traditional helix winding core bar is fixed on the schematic diagram on accurate winding-machine bed 1, mid portion is the core bar 5 that coiling is used, and accurate winding-machine bed two ends device symmetrically have dop 6 that core bar is clamped, and the centering problem in winding process is a difficult problem always.With reference to Fig. 2, Fig. 3, the core bar stationary fixture 2 that is hollow form that adopts in expression the present invention, fixture is provided with draw-in groove.Core bar and described fixture both side ends are welded as a whole.Owing to having overcome the centering problem in the winding process, coiling precision and product percent of pass have all obviously improved.With reference to Fig. 4, represent that high-precision spiral line shown in the present is disturbed to make the total schematic diagram of shape, in figure, 3 are the coiling tenslator, 4 for being turned to the sheet metal strip of high-precision spiral line.With reference to Fig. 5, be illustrated in the schematic diagram that metal sputtering mould 7 is carried out on the helix surface, in figure, expression is fixed simultaneously many helixes 8 and is carried out metal sputtering.

Represent with reference to Fig. 6 the tool and mould forming manufacturing method flow chart that high-precision spiral line of the present invention uses.The tool and mould forming manufacturing method that the high-precision spiral line uses, press following method of operation:

A. the helix completed of coiling is placed in the hydrogen stove and finalizes the design, and is warming up to 1000 ℃, is incubated 20 minutes;

B. the rear screw line of finalizing the design is pulled down from core bar, carries out electrochemical polish, inside and outside two-way polishing, polishing time 20 seconds;

C. with polishing rear screw line annealing in hydrogen atmosphere in the hydrogen stove, the deoxidation layer, 800 ℃ of temperature are incubated 10 minutes;

D. many helixes are fixed on mould, adopt the ion sputtering mode at the helix copper coating, sputter thickness 5-10um;

E. sputter rear screw line hydrogen furnace treatment reason, 780 ℃ of temperature rise to 850 ℃, are incubated 15 minutes;

F. adopt specialized detection, measure helix pitch, tape thickness, bandwidth.

Claims (2)

1. the tool and mould that uses of a high-precision spiral line, comprise the dop that is placed in the accurate winding-machine bed of helix two ends, the core bar that is placed in the middle part, it is characterized in that, core bar two ends are provided with the core bar stationary fixture of two hollow shape, and this fixture is provided with draw-in groove; Core bar and described stationary fixture both side ends are welded as a whole.

2. the high-precision spiral line uses the forming manufacturing method of tool and mould according to claim 1, it is characterized in that, by following process step operation:

A. the helix completed of coiling is placed in the hydrogen stove and finalizes the design, and is warming up to 1000 ℃, is incubated 20 minutes;

B. the rear screw line of finalizing the design is pulled down from core bar, carries out electrochemical polish, inside and outside two-way polishing, polishing time 20 seconds;

C. with polishing rear screw line annealing in hydrogen atmosphere in the hydrogen stove, the deoxidation layer, 800 ℃ of temperature are incubated 10 minutes;

D. many helixes are fixed on mould, adopt the ion sputtering mode at the helix copper coating, sputter thickness 5-10um;

E. sputter rear screw line hydrogen furnace treatment reason, 780 ℃ of temperature rise to 850 ℃, are incubated 15 minutes;

F. adopt specialized detection, measure helix pitch, tape thickness, bandwidth.

Images