Tailor welding method for impeller rear disc of large centrifugal fan

A technology of impeller rear plate and centrifugal fan, which is applied in welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of easy cracks due to stress concentration, large welding seam restraint, and large welding deformation, so as to reduce the restraint degree , reduce the probability of weld cracks, and reduce the effect of deformation

Pending Publication Date: 2021-08-20
江苏盾安环控系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The tailor welding of the impeller of a large centrifugal fan with unequal thickness generally adopts the circular tailor welding method. This method has a large degree of restraint in the weld seam, and welding defects such as cracks are likely to occur due to stress concentration. Post-shaping is difficult, therefore, improvements are necessary

Method used

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  • Tailor welding method for impeller rear disc of large centrifugal fan

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] see figure 1 , the present invention provides the following technical solutions: a large centrifugal fan impeller rear disc tailor welding method, comprising the following steps:

[0022] A. Grind and clean the welding area of ​​the thin plate of the impeller rear disc;

[0023] B. Put the cleaned sheet into an oven for drying;

[0024] C. Splicing and fixing the four dried impeller rear disk sheets with a positioning device;

[0025] D. Finally, weld the positioned impeller rear disk thin plate to form the centrifugal fan impeller rear disk.

[0026] In this embodiment, the drying temperature in step B is 80° C., and the drying time is 30 minutes.

[0027] In this embodiment, the application provides a tailor-welding method for the rear disc of a large centrifugal fan impeller, wherein the positioning device in step C adopts an I-shaped clamp.

[0028] In this embodiment, the application provides a large centrifugal fan impeller back plate tailor welding method, wh...

Embodiment 2

[0032] A large centrifugal fan impeller rear disk tailor welding method, comprising the following steps:

[0033] A. Grind and clean the welding area of ​​the thin plate of the impeller rear disc;

[0034] B. Put the cleaned sheet into an oven for drying;

[0035] C. Splicing and fixing the four dried impeller rear disk sheets with a positioning device;

[0036] D. Finally, weld the positioned impeller rear disk thin plate to form the centrifugal fan impeller rear disk.

[0037] In this embodiment, the drying temperature in step B is 100° C., and the drying time is 40 minutes.

[0038] In this embodiment, the application provides a tailor-welding method for the rear disc of a large centrifugal fan impeller, wherein the positioning device in step C adopts an I-shaped clamp.

[0039] In this embodiment, the application provides a large centrifugal fan impeller back plate tailor welding method, wherein, in the step D, CO 2 Shielded welding.

[0040] In this embodiment, the a...

Embodiment 3

[0043] A large centrifugal fan impeller rear disk tailor welding method, comprising the following steps:

[0044] A. Grind and clean the welding area of ​​the thin plate of the impeller rear disc;

[0045] B. Put the cleaned sheet into an oven for drying;

[0046] C. Splicing and fixing the four dried impeller rear disk sheets with a positioning device;

[0047] D. Finally, weld the positioned impeller rear disk thin plate to form the centrifugal fan impeller rear disk.

[0048] In this embodiment, the drying temperature in step B is 85° C., and the drying time is 32 minutes.

[0049] In this embodiment, the application provides a tailor-welding method for the rear disc of a large centrifugal fan impeller, wherein the positioning device in step C adopts an I-shaped clamp.

[0050] In this embodiment, the application provides a large centrifugal fan impeller back plate tailor welding method, wherein, in the step D, CO 2 Shielded welding.

[0051] In this embodiment, the ap...

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PUM

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Abstract

The invention discloses a tailor welding method for an impeller rear disc of a large centrifugal fan. The tailor welding method comprises the following steps that A, polishing and cleaning are carried out on a welding area of impeller rear disc thin plates; B, the cleaned thin plates are put into a drying oven for drying; C, splicing and fixing are carried out on the four dried impeller rear disc thin plates by adopting a positioning device; and D, finally, the positioned impeller rear disc thin plates are welded to form the impeller rear disc of the centrifugal fan. The operation method is simple, the restraint degree of a welding seam is reduced, stress is better released, the risk that welding defects such as cracks are generated in the welding seam is reduced, the welding amount is reduced, welding deformation is reduced, materials are saved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of tailor welding of impeller rear discs, in particular to a tailor welding method for the rear disc of a large centrifugal fan impeller. Background technique [0002] The centrifugal fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and induction of boilers and industrial furnaces; cooling and cooling of air conditioning equipment and household appliances Ventilation; drying and selection of grain; wind tunnel wind source and inflation and propulsion of hovercraft, etc. [0003] The tailor welding of the impeller of a large centrifugal fan with unequal thickness generally adopts the circular tailor welding method. This method has a large degree of restrain...

Claims

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Application Information

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IPC IPC(8): B23K9/16B23K9/32B23K9/235
CPCB23K9/16B23K9/235B23K9/32
Inventor 姜刚焦斌
Owner 江苏盾安环控系统有限公司
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