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Plasma cutting electrode vacuum soldering method

A technology of cutting electrodes and brazing method, applied in the field of vacuum brazing of ion cutting electrodes, can solve problems such as ineffective welding, and achieve the effects of good surface quality, stable quality, uniform and dense welding

Inactive Publication Date: 2004-05-05
上海市机械制造工艺研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional vacuum brazing method cannot effectively weld the copper sleeve, silver body and hafnium wire core in the plasma cutting electrode.

Method used

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  • Plasma cutting electrode vacuum soldering method
  • Plasma cutting electrode vacuum soldering method
  • Plasma cutting electrode vacuum soldering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to attached figure 1 First, assemble the oxygen-free copper sleeve and the silver body, the silver body and the hafnium wire core at a gap of 0.04mm, and place silver-copper brazing wire and silver-copper brazing sheet in the gap. Then, the assembly is placed on a rack and pushed into a vacuum furnace for vacuum brazing. Described vacuum furnace is commercially available routine product. Vacuum the vacuum furnace to 5 x 10 -2 pa, and raise the temperature of the vacuum furnace to 600°C (heating (1) in the block diagram), keep it warm for 1 hour (heating (1) in the block diagram), and then raise the temperature to 840°C (heating (2) in the block diagram), and keep it warm for 10 minutes ( Insulation (2)) in the block diagram, filled with nitrogen, cooled and released to obtain qualified products.

Embodiment 2

[0027] Select a gap of 0.03mm between the oxygen-free copper sleeve and the silver body, and the silver body and the hafnium wire core, and vacuum the vacuum furnace to 3×10 -2 pa, first raise the temperature to 600°C, keep it warm for 1 hour, then raise the temperature to 830°C, keep it warm for 10 minutes, fill it with nitrogen, and take it out of the furnace after cooling to obtain a qualified product. Others are as in Example 1.

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Abstract

A vacuum soldering technology for the plasma cutting electrode includes assembling the non-oxygen copper sleeve, silver body and wire feeding coaxial core together, arranging solder, putting the assembly in vacuum furnace, vacuumizing to 1-5X10 to the power -1 - -2 Pa, heating and holding the temp twice at 820-880 deg.C, filling N2, and cooling. The resultant electrode features high quality and long service life (500 m for cutting steel plate).

Description

1. Technical field: [0001] The invention relates to a vacuum brazing method, and in particular discloses a vacuum brazing method for a plasma cutting electrode. The vacuum brazing method is used to make the oxygen-free copper sleeve, the silver inner ring and the hafnium wire in the plasma cutting electrode three effective welding. The invention replaces imported plasma cutting electrodes used in high-efficiency numerically controlled plasma cutting equipment for marine steel plates imported from my country. 2. Background technology: [0002] my country's high-efficiency CNC plasma cutting equipment for marine steel plates currently relies on imports. When importing such equipment, the "plasma cutting electrode", a key vulnerable part in the equipment, must be purchased as an accessory at the same time, and its price is expensive. Moreover, the imported electrode is combined with copper sleeve, silver body and hafnium wire core with three coaxial mechanical heat pressing. D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K10/00B23K31/02
Inventor 陆建明张辅龙钱建华郭健尤忠德王丽莲王琦吴怀成
Owner 上海市机械制造工艺研究所有限公司
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