Ultra slender shaft tapered core bar, manufacturing method of ultra slender shaft tapered core bar and manufacturing method of ultra slender tapered spiral line

A slender shaft and helix technology, which is applied in the field of helix preparation, can solve the problems of performance degradation, high frequency damage of helical traveling wave tubes, and high precision requirements.

Active Publication Date: 2014-11-05
NANJING SANLE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is extremely difficult to prepare the ultra-slender tapered core rod and the ultra-slender tapered helix, in which the ultra-slender tapered helix consists of three sections, and the tapered size of each section of the helix is ​​different. The dimensional accuracy of a section of helix is ​​particularly high, and there are many bottleneck problems, such as: 1. The size of the helix is ​​small and the precision is high; 2. Secondly, the mechanical properties of the helix material (tungsten), the relative bending radius is small, and the tension and other factors 3. It is difficult to control the winding of each pitch jump; 4. It is difficult to control the s

Method used

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  • Ultra slender shaft tapered core bar, manufacturing method of ultra slender shaft tapered core bar and manufacturing method of ultra slender tapered spiral line
  • Ultra slender shaft tapered core bar, manufacturing method of ultra slender shaft tapered core bar and manufacturing method of ultra slender tapered spiral line
  • Ultra slender shaft tapered core bar, manufacturing method of ultra slender shaft tapered core bar and manufacturing method of ultra slender tapered spiral line

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Experimental program
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Effect test

Embodiment 1

[0060] An ultra-slender long-axis tapered core rod, which includes a straight section of 30mm at both ends and a tapered section of 70mm in the middle, the diameter of the straight section at one end is 0.55 ± 0.003mm, and the diameter of the straight section at the other end is diameter 0.7±0.003mm, the taper of the middle tapered section is 7′27″.

Embodiment 2

[0062] A preparation method of an ultra-slender long-axis tapered core rod, comprising the following steps:

[0063] a. Take a polished molybdenum rod (2) with a diameter of 1mm and a length of 170mm, clamp it into the collet (6), and tighten it through the fixing rods (15) at both ends.

[0064] b. Steps of EDM core rod grinding:

[0065] Such as image 3 As shown, fix the EDM fixture base (3) on the EDM base plate (9) by the fixing screw (1), turn on the DC adjustable speed motor (12), and control it between 300 and 500rpm, the adjustable speed motor (12) drive the transmission shaft (10) to rotate through the synchronous toothed belt (14) and the synchronous toothed wheel (13), and the transmission shaft (10) transfers the power of the DC adjustable speed motor (12) through four gears (4) The shafts (7) transmitted to both ends drive the collets (6) at both ends and the molybdenum rods (2) clamped on the collets (6) to rotate synchronously;

[0066] Then use a 130mm wide...

Embodiment 3

[0072] A method for preparing an ultra-slender tapered helix, comprising the following steps:

[0073] Such as figure 2 and Figure 4 Shown:

[0074] a. Take the two ends of the ultra-slender long-axis tapered mandrel (13) described in the above embodiment 1 and fix it on the servo motor (14), install the tapered support nozzle clamp (15) on the high-precision spiral winding machine , and ensure that it closely fits with the ultra-slender tapered helical core rod, the tungsten strip (16) is pulled out through the pay-off mechanism (17), and then the tension is checked by the tension detection device (18), and the electric heating device ( 19) heating the tungsten strip (16), and then winding it on the ultra-slender long-axis tapered mandrel (13);

[0075] b. Place the helical wire wound in step a in a hot alkaline solution, use an ultrasonic cleaner to remove greasy and foreign matter on the surface of the helical wire, and after ultrasonication for about 10 to 15 minutes,...

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Abstract

The invention discloses an ultra slender shaft tapered core bar, a manufacturing method of the ultra slender shaft tapered core bar and a manufacturing method of an ultra slender tapered spiral line. The core bar comprises 30 mm linear segments at the two ends and a 70 mm tapered segment in the middle, the diameter of the linear segment at one end ranges 0.55+/-0.003 mm, the diameter of the other linear segment at the other end ranges from 0.7 mm +/-0.003 mm, and the taper of the middle tapered segment is 7'27''. The core bar is high in precision, the manufacturing method of the ultra slender shaft tapered core bar is high in operability and can overcome many bottleneck problems in the prior art, the ultra slender shaft tapered core bar which is high in requirements of diameter accuracy and taper accuracy is manufactured, the error is smaller than 0.002 mm, through the core bar, the three-section type ultra slender tapered spiral line with the three sections different in size and taper is manufactured, and the ultra slender tapered spiral line can be applied to traveling-wave tubes which are wide in frequency, high in output power and large in duty cycle and has important application value.

Description

technical field [0001] The invention relates to a method for preparing a helix in a traveling wave tube, in particular to an ultra-slim long-axis tapered core rod, a preparation method thereof, and a preparation method for an ultra-slim long-axis tapered helix. Background technique [0002] The characteristics of modern warfare can be found in local wars in the world in recent years. Electronic countermeasures and air strikes will become important forms of non-contact warfare. Most military electronic systems are inseparable from power traveling wave tubes, and military equipment using millimeter wave technology More and more, its importance is obvious. Compared with microwave, millimeter wave has the advantages of large information capacity, strong anti-interference ability, good directionality, high resolution, small antenna size, and good mobility; compared with light wave and infrared wave band, it has strong ability to penetrate smoke and dust , basically works around ...

Claims

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Application Information

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IPC IPC(8): B23H5/04B23H9/18
Inventor 刘宏林魏建新张春晖高志强张劲松徐婷马丽叶
Owner NANJING SANLE GROUP
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