How to press out a fully automatic screwdriver?

Rolling is a process that uses a rolling tool with a certain cross-section to roll the blanks of certain materials of the Jin Dynasty to produce geographic deformation and form pits with corresponding cross-sectional shapes.

It can be seen that the hydraulic screw is a chipless method. The essence of the automatic screwdriver is to use some plastic materials to add in the cold state, so that the blank is plastically deformed under the rolling tool, and the corresponding thread is rolled. In the hydraulic threading process, the actual thread is the result of the redistribution of the blank metal from the working thread of the rolling tool.

The process of rolling threads in cold conditions began in 1831, when the bolts used to fasten railway sleepers were rubbed by a wire control machine. However, until the 1940 prints, roll precision threading had not been widely used. This is mainly due to the fact that the blank material is not suitable for rolling at the end of the nineteenth century and the beginning of the twentieth century. With the further improvement of the mechanical properties of the blank, and the successful development of high-precision hydraulic tools and high-tech rolling machine tools, the rolling technology of screw threads on the spiral rolling mill has been popularized, and the wind force has become more and more powerful. It can be used for sodium carbonate and alloy steel (such as taps, engine anchor bolts and power bolts, spindle and screw threads, hollow thin-walled parts, etc.).

In bronze, brass, aluminum, plastic, drilling, nickel, powder metallurgy, plastic and other blanks, various threads (including precision threads) are rolled on various types of parts (such as taps, engine anchor bolts) And power boring bolts, spindles and threads). Reading, hollow thin-walled parts, etc.).