69results about How to "Expand the range of industrial applications" patented technology

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.

The invention discloses a method for manufacturing a fine-grain magnesium alloy through alternate inverted extrusion and belongs to the technical field of magnesium alloy processing. The method includes the steps that a magnesium alloy cylindrical bar is obtained through cutting; secondly, the bar is heated; thirdly, a die is preheated; fourthly, alternate inverted extrusion is conducted, wherein the magnesium alloy cylindrical bar is subjected to 3-6 passes of inverted extrusion, and a magnesium alloy deformation part is manufactured; the operation sequences of all passes of inverted extrusion are the same; one time of blank remelting heating is conducted between every two adjacent passes of inverted extrusion, and a blank is overturned to be subjected to the next pass of inverted extrusion; and in the first time of inverted extrusion, the magnesium alloy cylindrical bar is placed at the bottom of a female die, a center male die descends and is then unloaded, and then a hollow male die descends; and fifthly, the final pass of forging is conducted, wherein the center male die and the hollow male die descend to conduct extrusion at the same time, and the fine-grain magnesium alloy is obtained. According to the method, the fine-grain magnesium alloy with the manufacturing strength and plasticity obviously improved and with the average grain size being smaller than 10 microns is manufactured through alternate inverted extrusion; and equipment is simple, cost is low, efficiency is high, operation is easy, and industrialization is achieved.