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Fan welding process

A welding process and fan technology, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve problems affecting the performance of centrifugal fans, etc., achieve the effects of eliminating welding residual stress, facilitating butt welding, and enhancing overall performance

Active Publication Date: 2021-04-09
陕西广大重型机械有限公司
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Problems solved by technology

[0004] In view of the above-mentioned related technologies, welding stress exists after the straight edge section, the volute tongue section, the gradually changing arc section of the coaming plate, and the outer straight edge section of the air outlet are welded, which will affect the performance of the centrifugal fan when used for a long time

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Embodiment Construction

[0053] The following is attached Figure 1-2 The application is described in further detail.

[0054] The embodiment of the present application discloses a fan welding process. The process steps of the fan welding process are as follows:

[0055] S1. Shell butt welding:

[0056] S11. Pre-welding treatment: clean the welding position and the vicinity of the upper casing and the lower casing with a high-pressure nozzle;

[0057] S12. Positioning of the upper casing and the lower casing: limit the upper casing and the lower casing by welding tooling, fine-tune the upper casing and the lower casing to align the upper casing and the lower casing, and then pass the positioning pin Carry out preliminary positioning, and then perform spot welding positioning on the upper casing and the lower casing;

[0058] S13. Perform preheating treatment on the welding seam position of the upper casing and the lower casing, and the temperature of the welding seam position of the upper casing an...

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Abstract

The invention relates to the technical field of fan production, in particular to a fan welding process. The fan welding process comprises the following process steps of S1, butt welding of a machine shell; S2, oil pipe welding, specifically, S21, rough machining; S22, segmented welding; S3, weld inspection; S4, kerosene penetration test; S5, heat treatment, wherein a jacking oil pipe, an oil return pipe and a threading pipe are made of 304 stainless steel, a fan casing is made of Q345C, heat treatment is conducted on the fan casing, the jacking oil pipe, the oil return pipe and the threading pipe according to the heat treatment requirements of the 304 stainless steel and the Q345C, the fan casing, the jacking oil pipe, the oil return pipe and the threading pipe are heated to 400-500 DEG C, and heat preservation time is 24 hours; S6, hydraulic pressure test; and S7, paint spraying. By means of the compiled fan welding process, the welding residual stress of the weld position of the fan casing and the weld position of the oil pipe can be eliminated, the connecting performance of the fan casing and the oil pipe is improved, then the overall performance of the fan casing is enhanced, and the service life of the fan casing is prolonged.

Description

technical field [0001] The present application relates to the technical field of fan production, in particular to a fan welding process. Background technique [0002] The fan is a mechanical device that converts the input mechanical energy into gas pressure and kinetic energy, and the gas pressure discharges the gas. It mainly includes a casing, an impeller, a motor transmission, a condenser, and an oil pipe. At present, the commonly used fan casing welding methods mainly include single-arc welding and semi-arc tailor welding. [0003] The Chinese patent with the application number 201611142069.3 discloses a welding process for the casing of the centrifugal fan of the range hood. The axially projected outer contour of the centrifugal fan casing includes the inner straight edge section of the air outlet, the volute tongue section, and the gradually changing arc section of the shroud. The outer straight section of the air outlet also includes a gradual arc circle seam welding...

Claims

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Application Information

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IPC IPC(8): B23K31/02B23K37/053B23P15/00
CPCB23K31/02B23K37/053B23P15/00B23K2101/04Y02E10/72
Inventor 曾林
Owner 陕西广大重型机械有限公司
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