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Preparation method of high-voltage switch bracket

A high-voltage switch, support plate technology, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problem of difficulty in obtaining defect-free tungsten brackets

Active Publication Date: 2020-12-18
辽宁蓝煜新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using the overall sintering method, it is difficult to obtain a tungsten stent with no defects and a good bonding surface, because Sn element is precipitated on the bonding surface during sintering, which affects the strength of the bonding surface
[0003] In summary, the above two methods have certain limitations when preparing tungsten stents.

Method used

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  • Preparation method of high-voltage switch bracket
  • Preparation method of high-voltage switch bracket
  • Preparation method of high-voltage switch bracket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The present invention can be better understood in conjunction with the accompanying drawings and specific implementation descriptions.

[0035] The present invention obtains copper tungsten 80 and red copper blanks through integral sintering, processes the blanks by machining, and then obtains copper-tungsten alloy conductive columns to be welded; obtains CuSn12 raw materials by casting, and obtains CuSn12 raw materials by machining. Way to obtain CuSn12 support plate to be welded. And the copper-tungsten alloy and CuSn12 are processed to meet the welding shape.

[0036] Wherein, further, the weight ratio of the components of the copper-tungsten 80 alloy is: W: 78%-82%, Cu: 18%-22%, and the impurity is <0.5%.

[0037] Further, the grouping of CuSn12 is: Cu: 85-88.5%, Sn: 11-13%, Ni≤2%, and other impurities.

[0038] Thoroughly clean the oil in the machined conductive columns and support plates; grind the parts to be welded before welding to make the welding surface sm...

Embodiment 2

[0052] The difference from Implementation 1 lies in the specific welding parameters.

[0053] In this embodiment, put the assembled welded parts into the vacuum welding chamber to evacuate, so that the vacuum degree in the welding chamber reaches 6×10 -2 Pa for welding preheating.

[0054]Specific preheating parameters: accelerating voltage: 85kV; focusing: 425mA; welding beam current: 23mA; welding speed: 9mm / s.

[0055] The preheating position is 3mm from the welding seam. Near cast tin copper 12 places. And the upper focusing method is used for preheating, and linear motion is performed once at CuSn12.

[0056] Weld the parts to be welded after welding preheating, and perform welding in a straight line welding method. The welding workpiece does not move, and the welding beam is deflected to the 0.3mm side of the copper end, focusing on the subsurface for welding.

[0057] Specific welding parameters: accelerating voltage: 85kV; focusing: 420mA; welding beam current: 45m...

Embodiment 3

[0059] The difference from Implementation 1 lies in the specific welding parameters.

[0060] In this embodiment, put the assembled welded parts into the vacuum welding chamber to evacuate, so that the vacuum degree in the welding chamber reaches 6×10 -2 Pa for welding preheating.

[0061] Specific preheating parameters: accelerating voltage: 85kV; focusing: 430mA; welding beam current: 25mA; welding speed: 8mm / s;

[0062] Near cast tin copper 12 places. And the upper focusing method is used for preheating, and linear motion is performed once at CuSn12.

[0063] Weld the parts to be welded after welding preheating, and perform welding in a straight line welding method. The welding workpiece does not move, and the welding beam is deflected to the 0.3mm side of the copper end, focusing on the subsurface for welding.

[0064] Specific welding parameters: accelerating voltage: 85kV; focusing: 420mA; welding beam current: 50mA; welding speed: 12mm / s; waveform: triangle wave, amp...

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Abstract

The invention belongs to the technical field of tungsten bracket preparation, and provides a preparation method of a high-voltage switch bracket. The preparation method specifically comprises the following steps that 1, a copper-tungsten 80 alloy is obtained in an integral sintering manner; 2, CuSn12 is obtained in a casting manner; 3, the copper-tungsten 80 alloy is machined to obtain a pre-welded part conductive column, and the CuSn12 is machined to obtain a pre-welded part supporting plate; 3, oil liquid in the machined conductive column and the supporting plate is thoroughly cleaned; 4, the conductive column and the support plate are fixedly assembled by using a welding fixture; 5, vacuumizing is carried out, and welding parameters including electron beam acceleration voltage, focusingcurrent, welding height and filament current are set; 6, the conductive column and the supporting plate are preheated in an electron beam welding manner; 7, welding is carried out in a linear weldingmanner, a welding workpiece is fixed, a welding beam deflects towards the conductive column, and welding is carried out; and 8, after the welding is completed, heat preservation is conducted in a welding chamber.

Description

technical field [0001] The invention belongs to the technical field of copper-tungsten alloy bracket preparation, and particularly provides a method for preparing a high-voltage switch bracket. Background technique [0002] With the continuous development of the high-voltage switch industry, higher requirements are put forward for some components in the high-voltage switch. Among them, the copper-tungsten 80 tungsten bracket is an important contact element. The structure of the copper-tungsten bracket includes CuW alloy and CuSn12. At present, the way to make the two into a whole can be brazing or integral sintering, but both of these two processes have different disadvantages. The brazing method is used to weld parts of this type of structure, and the silver-based solder is used. Since the directional solidification conditions cannot be met during welding, defects such as welding pores and welding interlayers are prone to appear on the welding surface, and the performance a...

Claims

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Application Information

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IPC IPC(8): B23K15/00B23K15/06
CPCB23K15/0026B23K15/0033B23K15/06
Inventor 韩会秋王博肖春林蔡艳伟王刚贾立强赵弟孟凡东季啸麟梁可心
Owner 辽宁蓝煜新材料有限公司