Welding process for large equipment supporting end cover plate
A large-scale equipment and welding process technology, applied in welding equipment, arc welding equipment, metal processing equipment, etc., can solve problems such as cracked welds, damage, weld corrosion, etc., to achieve short residence time, broad application prospects, prevent The effect of intergranular corrosion
Active Publication Date: 2019-03-08
苏州市东望医疗设备有限公司
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Problems solved by technology
In addition, the stress and strain generated in the joint due to pressure difference, vibration and thermal cycle, etc., may cause cracks in the weld with defects and damage the weld, or due to corrosion of the weld during use, it may also cause damage to the weld. lead to leak formation
Method used
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Experimental program
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Effect test
Embodiment Construction
[0029] The present invention proposes a welding process for supporting end cover plates of large-scale equipment, comprising the following steps:
[0030] S1. Grinding step before welding, check the welding equipment and welding positioner, and grind the cover plate and cover plate flange components to be welded. The scope of grinding the cover plate and cover plate flange components to be welded is the area to be welded on the cover plate and cover plate flange components and the 20mm area around the position to be welded.
[0031] S2. The pre-welding step is to combine the cover plate and the flange components of the cover plate, and pre-weld the joint position.
[0032] The specific operation steps are: connect the cover plate and the flange components of the cover plate without gaps, and weld the joint position. During the welding process, the welding current is 210A~230A, the welding voltage is 11V~15V, and the length of the weld bead is 10mm~25mm, the spacing is 100mm~2...
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The invention discloses a welding process for a large equipment supporting end cover plate. The process comprises the following steps that S1, grinding is conducted before welding, specifically, welding equipment and a welding positioner are inspected, and the to-be-welded cover plate and a cover plate flange secondary member are ground; S2, pre-welding is conducted, specifically, the cover plateand the cover plate flange secondary member are combined, and the combination position is pre-welded; S3, welding is conducted, specifically, the pre-welded cover plate and the cover plate flange secondary member are fixedly mounted on the welding positioner, the welding positioner is adjusted to a welding station, and then the cover plate and the cover plate flange secondary member are welded; and S4, detecting is conducted, specifically, a finished product subjected to welding and cooling is taken down from the welding positioner and detected. The welding process is stable in quality, good in root fusion and capable of well controlling the welding linear energy, formed welds are good in compactness, surface forming is attractive, appearance defects are avoided, and the pass rate of weldhelium mass spectrometer leak detection is greatly increased.
Description
technical field [0001] The invention relates to a welding process, in particular to a welding process for supporting end cover plates of large-scale equipment, and belongs to the technical field of machining parts processing. Background technique [0002] The equipment supporting end cover, also known as the head in the industry, is an essential and important part of various large-scale equipment. Take the low-temperature superconducting nuclear magnetic resonance vacuum container used in the medical field as an example, this kind of cover plate is required on the container. Due to the particularity of the medical field, the requirements for equipment precision are very high. Correspondingly, the requirements for the welding seam on the cover are also extremely strict. [0003] Traditional manual argon tungsten arc welding is a high-quality welding method, so it is widely used in industrial processing industries. Manual argon tungsten arc welding has the characteristics of...
Claims
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IPC IPC(8): B23K9/167B23K9/235
CPCB23K9/167B23K9/235
Inventor 董常友王宏张建平
Owner 苏州市东望医疗设备有限公司