304 stainless steel pipe is a hollow round steel, which is widely used in various architectural decoration fields such as staircase handrails, fence railings, courtyard gates and so on. In the process of bending, it is required to be smooth, accurate in angle, and not to burst.
304 stainless steel pipe bending method
Hot bending
Carry several rollers in a circular arc according to the outer diameter of the 304 stainless steel pipe, and then fix the rollers firmly on the iron plate, fill the iron pipe with sand, plug both ends with wooden stoppers, and heat the places that need to be bent with flames. bending.
Process difficulties
During processing, the friction between the workpiece and the tool will generate high heat, which is easy to wear the tool. Therefore, the requirements for tool materials are relatively strict, which require wear resistance and high temperature resistance. And also to satisfy the sharp edge.
The processing speed is slow, because the force will be greater during cutting, resulting in low production efficiency. In addition, due to the high calorific value, it is necessary to choose a good cooling oil, usually sulfur chloride, which will have a better effect.
The hardest part is actually drilling deep holes and tapping. Therefore, when processing 304 stainless steel pipes, workers must have excellent experience and skills.
Precautions
Elbow: The normal requirement for round pipe elbow R is: the radius of the bend core (center line) R¡Ý1.5~2 times the diameter. If the R angle is too small, the R angle part of the tube will be flat. The bending R angle of the same tube should generally be kept consistent, so that the consistency of the wheel mold can be met. The straight side length of the elbow should be ¡Ý2 times the diameter, otherwise the elbow mold cannot be clamped smoothly.
Process holes: For pipes involving welding, consider preserving process holes for welding slag.
Machining performance: First of all, we must pay attention to the processing performance of 304 stainless steel pipe. Stainless steel has large plasticity and high toughness during cutting, consumes high energy during cutting, high cutting temperature, low thermal conductivity of stainless steel, and poor heat dissipation can easily lead to tool temperature. Elevated. Stainless steel has strong bonding and condensing weldability, and it is easy to generate buildup when cutting. Stainless steel has a strong tendency to harden. It is easy to form a hardened layer on the cutting surface.