What problems exist when processing stainless steel flanges and how to solve them?
The weld defects of stainless steel flanges are quite serious. If manual mechanical polishing is used to compensate, the resulting polishing marks will cause surface unevenness, affecting aesthetics.
Nov 14,2022
Weld seam defects: The weld seam defects of stainless steel flanges are quite serious. If manual mechanical polishing is used to compensate, the resulting polishing marks will cause surface unevenness, affecting aesthetics; uneven polishing and passivation: After manual polishing and then acid pickling and passivation treatment, it is difficult to achieve a uniform treatment effect for large workpieces, resulting in an unsatisfactory uniform surface. Additionally, there are drawbacks such as high labor costs and auxiliary material costs.
Difficult to remove scratches: Overall acid pickling and passivation can lead to chemical or electrochemical corrosion and rusting in the presence of corrosive media, and it cannot remove impurities such as carbon steel and spatter that adhere to the stainless steel surface due to scratches and welding spatter.
How to solve the processing problems of stainless steel flanges?
1. Choose the blanking process, and after completion, proceed to the next process. Different stainless steel workpieces enter the corresponding processes based on processing requirements.
2. When bending, first determine the thickness of the stainless steel 304 seamless pipe material based on the dimensions on the drawing to select the appropriate tools and grooves for bending, avoiding deformation caused by collisions between the product and the tools. The selection of the upper mold is crucial (different models of upper molds may be used for the same product), while the selection of the lower mold is determined by the thickness of the sheet.
3. To ensure strong welding, create raised points on the workpiece to be welded, allowing the raised points to make uniform contact with the flat plate before electric welding, ensuring consistent heating at all points. It also helps to determine the welding position. When welding is required, adjust the pre-pressure time, holding time, maintenance time, and rest time to ensure the workpiece can be spot welded securely.
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