The standard for burr length in sheet metal processing is not fixed, but depends on different industries, processes, and product requirements. Generally speaking,
in the field of sheet metal manufacturing, the burr length should be controlled within 0.1-0.3 millimeters to ensure product quality and safety. This standard mainly refers to the common practices and quality control requirements of this industry in various countries around the world. As a sheet metal service provider in China, Mulan Group also strictly follows this requirement to produce and process sheet metal products for export to various countries. Regarding the generation and treatment of burrs, Mulan Group briefly introduces the following:
Definition and causes of burrs
Burrs refer to small protrusions that occur at the edges of workpieces during metal processing due to cutting, grinding, and other operations. These protrusions not only affect the appearance quality of the product, but may also pose potential threats to its performance and safety. Therefore, controlling the length of burrs has become a focus of attention in many industries.
The standards for burrs on sheet metal parts mainly include the following aspects:
1. Burr height:
Products with smooth surfaces usually require a burr height of ≤ 0.06mm, while ordinary products require a burr height of ≤ 0.1mm. For the case of plate thickness δ ≤ 1.2mm, the burr height should also be ≤ 0.1mm; For cases where the plate thickness δ>1.2mm, the burr height should be ≤ 5% of the plate thickness.
2. Number of burrs:
It is usually required that the number of burrs on sheet metal should not exceed 20 per square meter.
3. Burr shape:
The shape of the burr should be blunt, not pointed or sharp.
4. Burr location:
It is usually required that burrs must be in a specific area, rather than on critical surfaces or edges of the product.
Methods for handling burrs on sheet metal parts:
1. Prevention:
Optimizing the process can reduce the occurrence of burrs on sheet metal. Specific measures include selecting appropriate stamping processes and materials, conducting thorough inspections and maintenance of molds, using appropriate coolants and cutting fluids, and adopting appropriate process parameters such as machining speed and die pressure.
2. Remove:
If burrs appear on the sheet metal, the following methods can be used to remove them.
Use manual or mechanical tools to remove burrs, taking care not to damage the surface of the sheet metal.
a、 Grinding or polishing treatment should be carried out. If high gloss treatment is required, it should be carried out near the polishing machine after polishing.
b、 Acid washing or electrolytic treatment can effectively remove burrs on the surface of sheet metal, but care should be taken not to cause secondary damage to the sheet metal.
Of course, the current mainstream methods for sheet metal processing and manufacturing are grinding and pickling to remove burrs.
The importance of controlling burr length
Controlling the length of burrs is crucial for ensuring product quality and safety. Excessive burrs may cause problems such as jamming and increased wear during product use, and may even lead to safety accidents. Therefore, manufacturers must strictly control the length of burrs during the production process to ensure that the product meets the predetermined performance standards.
Methods to reduce burrs
Of course, in the entire production process of sheet metal parts, sheet metal manufacturers often adopt a series of methods to reduce the generation of burrs, such as optimizing processing technology, selecting suitable cutting tools and parameters, and strengthening sheet metal equipment maintenance. These are all effective ways to reduce burr length.
In short, the standard for burr length varies by industry and product, but it is usually controlled within a certain range to ensure product quality and safety. As a professional sheet metal manufacturing service provider in China, Mulan Group has been satisfied with the sheet metal products delivered to customers from various countries in the past, and has also encouraged customers from multiple countries around the world to actively establish long-term cooperative relationships.
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