Small holes, such as the flame cylinder and blade air film hole of aero engine, chemical fiber mechanical spinneret, etc., have small and many hole diameters, which are difficult to polish and have low efficiency.
Liquid abrasive flow processing technology is a processing method that uses the friction and impact between the abrasive particles and the surface of the workpiece to achieve material removal by pressing the liquid medium containing abrasive particles into the workpiece through a high-pressure pump.
For the processing of fine holes, liquid abrasive flow processing technology can effectively solve this problem.
First of all, for the fine polishing of the surface of the fine pores, the liquid abrasive flow industry can reach Ra01-0.3 or so.
Secondly, the inlet and outlet of the fine pores can be obtained by using the abrasive flow process05-0.3. Even larger rounded corners.
In addition, metamorphic layers such as laser beams, electron beams, and remelting layers generated by EDM are processed. Because aerospace parts mostly work under high temperature and high pressure load conditions, the existence of remelting layer and its microcracks will have a serious impact on the working reliability and life of the parts, therefore, the removal of the recasting layer and remelting layer by liquid abrasive flow is often an indispensable post-treatment process for aerospace products.
The smallest pore size that can be machined in the liquid abrasive flow process is currently 01. As far as fine hole processing is concerned, it has the following characteristics:
1. In addition to the improvement of processing accuracy and surface quality, liquid abrasive flow processing technology also has the advantages of high processing efficiency and low processing cost.
2. Liquid abrasive flow processing does not require complex tools and fixtures, so it can greatly shorten the processing cycle and reduce the processing cost.
3. Due to the scouring effect of abrasive flow during processing, it can also reduce the thermal deformation and residual stress of the workpiece, and further improve the stability and reliability of the workpiece.