A production process for circular air valve body

Abstract

The invention relates to a production process for a circular air valve body, comprising the following steps: S1, pressing a galvanized sheet to form a thin plate body; S2, when welding a longitudinal seam, passing a welding groove from one welding slot to another Welding trough, so as to form a hollow cylindrical billet with integrated longitudinal seam and stable welding, and cut and separate the two ends of the hollow cylindrical billet from the roller body through the cutting head and the welding groove; S3, blank the hollow cylindrical billet into a special whole On the circular flanging device, the full-circle flanging device includes a frame, a full-circle fixing structure and a flanging driving structure; S5, making the cylinder rotate in a circle inside the hollow cylindrical billet to realize the roundness of the hollow cylindrical billet; S6 1. Make the hollow cylindrical billet turn outward while rotating in a circle, and complete the single-side flanging of the hollow cylindrical billet; S7. Perform flanging at the other end of the hollow cylindrical billet to finally form the damper valve body. The invention has the following advantages: ensuring the structural strength of the circular air valve body, avoiding cracking at the edge of the flanging, and ensuring the quality of the flanging.

Description

Technical fields: [0001] The present invention relates to the field of damper production, specifically a production process for a circular damper valve body. Background: [0002] The damper is an indispensable central air conditioning terminal accessory in ventilation, air conditioning regulation and air purification engineering, which is generally used in air conditioning and ventilation system pipes to adjust the air volume of branch pipes, and is also used for mixed regulation of fresh air and return air. The round damper body is a more common valve structure in the field of damper valves, which requires flanging at the end of the circular valve body. [0003] At present, in the production of the circular damper valve body, in order to facilitate flanging, first flange the two sides of the thin plate body, and then form a circular valve body structure through longitudinal seam welding, although this operation is conducive to flanging, but not conducive to welding, welding lon...

AI Technical Summary

Problems solved by technology

[0003] At present, in the production of circular damper valve bodies, in order to facilitate flanging, the two sides of the thin plate body are flanged first, and then the circular valve body structure is formed by longitudinal seam welding. Although this operation is conducive to flanging edge, but it is not conducive to welding. The welding longitudinal seam is a U-shaped structure. Firstly, it is a difficult point to clamp and fix this structure during the welding process. Secondly, the welding strength is inconsistent, which affects the structural strength and connection stability of the entire air valve body. , the welding stress of the longitudinal seam at the flange is concentrated, and defects such as welding joints are prone to occur, and the stress at the transition between the flange and the valve body is more concentrated;

[0004] Therefore in this application, the production process of the circular damper valve body is changed into the operation of first longitudinal seam welding and then flanging, but the following defects still exist in the actual operation process: 1. When the horizontal longitudinal seam is welded, the weld seam The head and tail ends cannot be penetrated during welding, so concave welds are prone to appear at the head and tail ends, and the stress at the head and tail ends is concentrated. When the flanging is processed in the later stage, the edge of the longitudinal seam of the flanging will be cracked, which will increase the product scrap rate; 2. Due to wind The valve body is rolled and welded by a thin plate to form a hollow cylindrical billet, and then flanged, so the roundness of the hollow cylindrical billet cannot be guaranteed, and it is prone to deformation during the flanging process, resulting in bending at the transition of the flanging and other phenomena, the quality of flanging cannot be guaranteed

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