Method for producing voltage-bearing aluminum alloy tank body of ultra-high voltage switch by V-process

An aluminum alloy tank body and casting production technology, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., to achieve good economic benefits, reduce cleaning workload, and improve mechanical properties

Active Publication Date: 2010-04-14
NANYANG HUISEN PRECISION INSTR CASTING
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

There are no successful cases of suitable casting methods for the production of pressure-bearing aluminum alloy tanks for ultra-high voltage switches

Method used

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  • Method for producing voltage-bearing aluminum alloy tank body of ultra-high voltage switch by V-process
  • Method for producing voltage-bearing aluminum alloy tank body of ultra-high voltage switch by V-process
  • Method for producing voltage-bearing aluminum alloy tank body of ultra-high voltage switch by V-process

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Embodiment Construction

[0028] The method of the present invention will be further described in conjunction with the accompanying drawings.

[0029] The casting system includes an upper mold 2 and a lower mold 1 divided by a parting surface 3 , the upper mold 2 is provided with a stomach 4 , a ventilation hole 5 and a vertical tube 6 ; the lower mold is provided with an ingate 7 . The material of the produced pressure-resistant tank is aluminum alloy ZL101A-T6, the overall size of the tank is 1272mm×862mm×720mm, the weight of the casting is 167kg, and the Ra value of the surface roughness of the inner cavity is required to be no greater than 6.3μm. Design pressure: 0.6Mpa (20°C gauge pressure); withstand pressure: 1.2Mpa (20°C gauge pressure); burst pressure: 3Mpa (20°C gauge pressure); routine test: filled with SF6 or helium 0.4 Mpa (20°C gauge pressure) quantitative leak detection, the air leakage rate is not more than 0.5Pa.cm 3 / 3.

[0030]The size of the casting is large, and the wall thicknes...

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Abstract

The invention discloses a method for producing a voltage-bearing aluminum alloy tank body of an ultra-high voltage switch by a V-process, comprising the following steps: model making, thin film heating, thin film shaping (film absorbing), coating spraying, sandbox placing, ram-jolting by adding sand , back film covering, film loosening, core setting, box folding, pouring, removing box and shaking out. After the process is improved, an intermediate frequency furnace is utilized to melt and a crucible heat preserving furnace is utilized to modify and refine. When melting in the intermediate frequency furnace, microelements such as tombarthite and the like are replenished and a new non-stirring melting and refining technology is adopted so as to reduce oxide inclusion content in alloy liquid. Modification and refining treatment in the crucible heat preserving furnace ensures high purity degree and high component precision of aluminum liquid, and using pure aluminum alloy liquid can increase the ratio of acquiring qualified pressure-proof tank body foundry products.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy tank body casting, and in particular relates to a method for producing an ultra-high voltage switch pressurized aluminum alloy tank body by V-method casting. Background technique [0002] The pressure-bearing aluminum alloy tank body of the ultra-high voltage switch is a key component of high-voltage power transmission and transformation equipment, and the overall quality requirements of the pressure-resistant aluminum alloy tank body castings are high. Since high-voltage power transmission and transformation electrical equipment requires no maintenance for 15 years, the technical regulations require water pressure, air pressure strength tests and SF6 air tightness leak detection tests for castings one by one. The material of this kind of parts is aluminum alloy ZL101A-T6. The wall thickness is between 10-14mm, and the volume is between 1800×1500×800. Belongs to large thin-walled parts. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/03B22C9/24
Inventor 徐通生赵松庆王宏伟杨焕乔
Owner NANYANG HUISEN PRECISION INSTR CASTING
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