Tool cathode and method for improving flatness of electrolytic milling bottom surface

Abstract

The invention relates to a tool cathode capable of improving the flatness of the bottom face subjected to electrolytic milling and grinding machining and a method and belongs to the field of electrolytic milling and grinding composite machining. A plurality of water outlet holes are distributed in the end face of the tool cathode and covered with an abrasive grain layer. The radii of the end facewater outlet holes are equal, and the circular centers of the water outlet holes are located on intersection points of a plurality of concentric circles and straight lines. The circular centers of theconcentric circles serve as the center of the end face of the tool cathode, and the radii of the concentric circles are increased sequentially. The straight lines all pass through the center of the end face of the tool cathode, the number of the straight lines is equal to the number of the concentric circles, and the included angles between all the adjacent straight lines are equal. All the end face water outlet holes are symmetrically distributed along the straight line. In work, because of the effect of the end face water outlet holes, an electrolyte rapidly flows towards the two sides of the machined bottom face of a workpiece, flowing of the electrolyte in the middle area of the machined bottom face of the workpiece is restrained, and finally the machined bottom face, with the good flatness, of the workpiece can be obtained. The flatness of the bottom face subjected to electrolytic milling and grinding machining can be effectively improved, and application and popularization of the technology are promoted.

Description

technical field [0001] The invention relates to a tool cathode and a method for improving the smoothness of the bottom of electrolytic milling and grinding, and belongs to the field of electrolytic grinding combined processing. Background technique [0002] With the development of the aviation industry, integral structural parts have been used as much as possible in new models, such as integral casings, integral blisks, integral frame structures, integral panels and girders, etc. These integral components are mostly made of difficult-to-cut materials such as titanium alloys, nickel-based superalloys, and metal-based composite materials, and have large sizes, complex features, and light and thin structures, and have a high material removal ratio. When machining technology is used, due to the large cutting force and high cutting temperature, the tool wears quickly and the parts have residual stress and deformation. Although thermal processing technologies such as EDM do not g...

AI Technical Summary

Problems solved by technology

However, since the end of the insulating tool needs to be insulated, the water outlet holes can only be distributed on the side wall, so that the machining can only start from the side wall of the workpiece, which limits the application range of this technology

In addition, affected by factors such as grinding force, electrolyte scouring, Joule heat, etc., when processing with a large grinding force or a high current density, the insulating material of the tool is prone to damage, resulting in redistribution of the electric field on the bottom surface of the workpiece, resulting in insulation failure

Images