Where do burrs on stainless steel heat exchange tubes come from? Can we just ignore it?
By: mxgy,
The burrs on stainless steel heat exchange tubes mainly come from machining processes such as cutting and welding. Burrs can affect the heat transfer efficiency and fluid flow characteristics of stainless steel heat exchange tubes, and may even lead to equipment failure. So we can’t just ignore it!
Mechanical deburring is the most traditional and widely used method, mainly including the following techniques:
Scraper method: By using a device with a blade to rotate and expand the pipe, burrs are scraped off, and the scraped burrs are discharged from the hole. This method is suitable for removing larger burrs and has high efficiency.
Rolling method: By using a rolling device inserted into the pipe, the internal burrs are subjected to plastic deformation, achieving the effect of reducing the height of burrs. This method causes minimal damage to the pipe wall and is suitable for batch processing.
Inner hole brush method: Use a high-speed rotating inner hole brush (with a speed of up to 14000 revolutions per minute) to remove burrs, and can handle burrs with a minimum diameter of 1.5mm. This method can not only remove cross hole burrs, but also remove burrs at the bottom of the hole and polish it.
Hand pulling method: For small burrs, they can be directly pulled out by hand, but safety precautions should be taken to avoid being cut by sharp burrs.
Chemical methods soften or dissolve burrs through chemical reactions, mainly including:
Chemical polishing: Using chemical polishing solution (mainly composed of sulfuric acid and phosphoric acid) under electrolytic action, the burr area is preferentially dissolved to achieve a smooth effect. This method is suitable for irregularly shaped workpieces, but strict control of solution concentration and processing time is required.
Pickling treatment: Soak stainless steel products in an acidic solution and remove burrs and surface oxides through chemical corrosion. During operation, safety precautions should be taken to avoid acid damage.
Electrolytic polishing: The workpiece is immersed in electrolyte as a positive electrode, and after being electrified, an oxide film is formed on the surface. The burr area is preferentially dissolved due to contact with more solution. This method can achieve a mirror effect, but it requires regular replacement of the electrolyte.
Physical methods use energy fields or physical effects to remove burrs:
Laser deburring: Using laser equipment to accurately irradiate the burr area, quickly remove it without touching the surface of the workpiece. This method has high accuracy and is suitable for occasions with strict requirements for surface quality.
Flame polishing: Heat the burr area with a flame to soften it, and then remove it with a metal scraper or grinding wheel. Suitable for fine burr treatment, but attention should be paid to operational safety.
Oxidation method: Oxygen flow is introduced during welding to use welding waste heat to oxidize and remove burrs. This method, combined with welding technology, has high efficiency.
Pulling method: When the steel pipe passes through the mold, the inner burrs are removed under the action of the circular blade of the floating plug. This method is suitable for continuous production.
When choosing a deburring method, it is necessary to comprehensively consider the material, specifications, production batch, and final usage requirements of stainless steel heat exchange tubes to achieve the best cost-effectiveness.
Where do burrs on stainless steel heat exchange tubes come from? Can we just ignore it?
By: mxgy,
The burrs on stainless steel heat exchange tubes mainly come from machining processes such as cutting and welding. Burrs can affect the heat transfer efficiency and fluid flow characteristics of stainless steel heat exchange tubes, and may even lead to equipment failure. So we can’t just ignore it!
Mechanical deburring is the most traditional and widely used method, mainly including the following techniques:
Scraper method: By using a device with a blade to rotate and expand the pipe, burrs are scraped off, and the scraped burrs are discharged from the hole. This method is suitable for removing larger burrs and has high efficiency.
Rolling method: By using a rolling device inserted into the pipe, the internal burrs are subjected to plastic deformation, achieving the effect of reducing the height of burrs. This method causes minimal damage to the pipe wall and is suitable for batch processing.
Inner hole brush method: Use a high-speed rotating inner hole brush (with a speed of up to 14000 revolutions per minute) to remove burrs, and can handle burrs with a minimum diameter of 1.5mm. This method can not only remove cross hole burrs, but also remove burrs at the bottom of the hole and polish it.
Hand pulling method: For small burrs, they can be directly pulled out by hand, but safety precautions should be taken to avoid being cut by sharp burrs.
Chemical methods soften or dissolve burrs through chemical reactions, mainly including:
Chemical polishing: Using chemical polishing solution (mainly composed of sulfuric acid and phosphoric acid) under electrolytic action, the burr area is preferentially dissolved to achieve a smooth effect. This method is suitable for irregularly shaped workpieces, but strict control of solution concentration and processing time is required.
Pickling treatment: Soak stainless steel products in an acidic solution and remove burrs and surface oxides through chemical corrosion. During operation, safety precautions should be taken to avoid acid damage.
Electrolytic polishing: The workpiece is immersed in electrolyte as a positive electrode, and after being electrified, an oxide film is formed on the surface. The burr area is preferentially dissolved due to contact with more solution. This method can achieve a mirror effect, but it requires regular replacement of the electrolyte.
Physical methods use energy fields or physical effects to remove burrs:
Laser deburring: Using laser equipment to accurately irradiate the burr area, quickly remove it without touching the surface of the workpiece. This method has high accuracy and is suitable for occasions with strict requirements for surface quality.
Flame polishing: Heat the burr area with a flame to soften it, and then remove it with a metal scraper or grinding wheel. Suitable for fine burr treatment, but attention should be paid to operational safety.
Oxidation method: Oxygen flow is introduced during welding to use welding waste heat to oxidize and remove burrs. This method, combined with welding technology, has high efficiency.
Pulling method: When the steel pipe passes through the mold, the inner burrs are removed under the action of the circular blade of the floating plug. This method is suitable for continuous production.
When choosing a deburring method, it is necessary to comprehensively consider the material, specifications, production batch, and final usage requirements of stainless steel heat exchange tubes to achieve the best cost-effectiveness.
