1. Development of foreign pipe thread lathe processing
At present, computer technology is widely used in the industrial field, and the processing of pipe thread lathes has achieved numerical control and unmanned operation. Some pipe thread lathe processing equipment production companies in the United States and Japan rely on their strong strength in precision machinery manufacturing to solve the A series of substantive problems in EDM technology j. Candy has high seminal vesicles. j The machine tools with high rigidity, high automation and high machining surface roughness are constantly appearing, so that the processing function and the size of the cake continue to expand. Internationally, EDM can process molds and parts weighing dozens of tons. , down to pores as small as a few microns in diameter.
In the aspect of wire cutting of pipe thread lathes, it has now transitioned to the stage of comprehensive computer control. The wire cutting technology of variable cross-section 3D graphics, automatic wire threading system and mirror wire cutting technology have all reached the practical stage.
2. Development of Pipe Thread Lathe Processing in China
In the early 1950s, my country began to research and trial-produce EDM coating equipment, that is, to coat cemented carbide on high-speed steel metal cutting tools and cold stamping dies by pipe thread lathe technology. At the same time, my country has also successfully developed an EDM punching machine, which is widely used in the processing of small holes in diesel engine nozzles.
In the early 1960s, the Institute of Electrical Engineering of the Chinese Academy of Sciences successfully developed the first cutting machine tool in my country that relies on an imitation-shaped pipe thread lathe. Subsequently, a new process of "steel-to-steel" for cold punching dies with Chinese characteristics appeared, that is, the method of punching punches with punches when machining cold punches with EDM technology, which ensures the uniformity of punch and punch dies and greatly simplifies crafting process.
In the late 1960s, engineer Zhang Weiliang of Shanghai Electric Meter Factory invented my country's unique high-speed wire-cutting machine tool on the basis of anode cutting. Shanghai Fudan University developed a CNC system for wire EDM.
In the 1970s, with the continuous progress of the pipe thread lathe technology and equipment, the pipe thread lathe cavity mold forming process has matured. The wire EDM process has also evolved from processing small cold punches to being able to process medium and larger dies. The cutting thickness continues to increase, and the machining accuracy also continues to improve.