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How to address issues that arise during the machining of stainless steel flanges.
Release time:
Apr 20,2020
To ensure a strong weld, raised bumps are created on the workpieces to be welded. These bumps allow for even contact with the flat surface before electric current is applied for welding, thereby guaranteeing uniform heating at each point.
The machining of stainless steel flanges requires understanding and attention to certain issues:
1. Weld Defects: The weld defects in stainless steel flanges are relatively severe. If these defects are addressed using manual mechanical grinding, the resulting grinding marks will create an uneven surface, thereby affecting the aesthetic appearance.
2. Uneven polishing and passivation: After manual polishing and buffing, the workpiece undergoes acid pickling and passivation treatment. For larger-area components, it is difficult to achieve a uniformly consistent treatment effect, making it impossible to obtain an ideally uniform surface. Additionally, this process has drawbacks such as high labor costs and relatively high auxiliary material expenses.
3. Scratches are difficult to remove: Although overall pickling and passivation can prevent corrosion under conditions where corrosive media are present, chemical or electrochemical corrosion leading to rusting may still occur. Moreover, impurities such as carbon steel and spatter that have adhered to the stainless steel surface due to scratches or welding splashes cannot be removed by this process.
So, how can we solve the problems encountered in stainless steel flange machining?
1. After selecting the blanking process and completing it, proceed to the next operation. Different stainless steel workpieces will enter the corresponding processes based on their specific machining requirements.
2. When bending, first determine the tools and die slots to be used based on the dimensions specified in the drawing and the thickness of the 304 stainless steel seamless steel pipe material. It is crucial to select the upper die carefully to prevent collisions between the product and the tool, which could cause deformation. (In the same product, different models of upper dies may be used.) The selection of the lower die should be based on the thickness of the sheet material.
3. To ensure a strong weld, embossment points are created on the workpieces to be welded. These embossments allow for uniform contact with the flat surface before electric current is applied, guaranteeing consistent heating at each point. At the same time, they help accurately determine the welding positions. Before starting the welding process, it’s essential to properly adjust the pre-pressure time, hold-pressure time, maintenance time, and rest time to ensure that the workpieces are securely spot-welded.
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