What factors affect the precision tolerance of chemical etching?

What factors affect the precision tolerance of chemical etching?

By in Industries

Chemical etching is based on the original surface of the part. Unlike most mechanical processing methods, it is not based on the reference surface of the metal cutting machine tool as the processing reference.

Its processing deviation is only affected by the inherent processing accuracy of the machine tool. Therefore, the processing tolerance that can be achieved by chemical etching is mainly affected by the following factors.

  1. The influence of part material: The different etching speeds and effects produced by the same material will also have different corrosion tolerances in the same etching solution.
  2. The influence of part size: The larger the part size, the different positions in the etching tank, so the possibility of corrosion differences in each part is greater, mainly due to the difference in etching speed.
  3. The influence of part suspension method: If a large plate part is placed vertically in the etching tank, it will appear a cone after etching, so when calculating the tolerance, this tolerance caused by the etching process itself should also be included in the total tolerance.
  4. The influence of corrosive agent: The concentration range of the chemical composition of the corrosive solution must be strictly controlled to keep the temperature distribution of the corrosive agent in each part of the etching tank uniform, and to keep the concentration of the corrosive solution in each part of the etching tank uniform.
  5. Influence of etching depth: The deeper the etching depth, the longer the parts are immersed in the etching solution, and the longer the time, the greater the changes in the various chemical components of the etching solution, which in turn increases the changes in the etching speed and the corrosion effect.
  6. Influence of template accuracy and pattern transfer accuracy: 1. The template used for engraving the pattern, the accuracy of this template is greatly affected by the template processing cost. 2. The photographic film used for photographic and silk-screen pattern transfer can be very accurate, especially for photographic pattern transfer, which can achieve a pattern transfer accuracy that is almost exactly the same as that of photographic film.
  7. Influence of the etching process. To ensure the accuracy of the corrosion level, the side etching rate must be determined experimentally, and the precise size range of the pattern template must be determined accordingly. Due to the influence of chemical etching changes in the horizontal direction, it is not advisable to use grooves or ribs with very precise processing dimensions. Since the horizontal tolerance is required to be within the range of ±0.25mm-±0.5mm, processing has been widely used, especially in special industries such as aircraft industry and ships.
Metal Etching China

We Can Take Care Of Your Metal Etching Needs.

BE-CU metal etching china company’s strength lies in our investment in chemical etching production line. Chemical etching production line are the foremost innovation to the metal etching industry.

The programmability of Chemical etching production line gives us quick and accurate repeatability. This constant replication allows for better finishes, tighter tolerances and most importantly – faster cycles for metal forming.

By engaging our etching company, you can also get the much-needed support to design your part for any specific purpose. Our team can provide custom design tips, such as ensuring consistent wall thickness and avoiding overly thick sections that can sink.

Are you designing new products for projects companies? We can help! Here at BE-CU Metal Etching China Company, we offer a reasonably priced rapid metal etching service that will allow you to make an amazing prototype that will impress your clients. Get a free project review here so we can get started for your metal etching products!

Comments are closed.