High-strength bolt production process

Abstract

The invention discloses a high-strength bolt production process. The high-strength bolt production process includes the following steps that bar-shaped raw materials are selected and used, the raw materials are medium-carbon alloy steel, base materials are upset through hot upsetting dies, and therefore semi-finished bolt workpieces are acquired; solution treatment is conducted on the semi-finished bolt workpieces; bolt blanks are placed in a bell jar furnace for heat preservation and cooling; quenching is conducted; formed pieces are quenched in a salt bath furnace; tempering is conducted; the semi-finished bolt workpieces are coarsely machined in the aspects of the appearance and the size; the semi-finished bolt workpieces are finely machined in the aspects of the appearance and the size, rods of the semi-finished bolt workpieces are rolled to machine external threads, and therefore finished bolt workpieces are acquired; carbonization is conducted; the surfaces of the blanks are treated. By the adoption of the high-strength bolt production process, the strength of bolts can be improved, the technological process is simple, manufacturing cost is low, the technological process is good in continuity, and production efficiency is high.

Description

【Technical field】 [0001] The invention relates to the technical field of bolt production technology, in particular to the technical field of high-strength bolt production technology. 【Background technique】 [0002] Bolts hold everything together, from the screws in electric toothbrushes and door hinges, to the multitude of bolts used to hold concrete pillars in buildings. Threads date back to 400 BC, but modern bolt and screw craft However, the most important developments in the field have been made in the past 150 years, and experts disagree on the origin of the trivial nuts and bolts. An article "Nuts and Bolts" suggests that threaded bolts and associated nuts have been used as fasteners only as far back as the 15th century. He based his conclusions on the first printed record of a screw in a book in the early 15th century. However, many admit that while threaded bolts date back to the 15th century, unthreaded bolts date back to Roman times, when these bolts were used to...

AI Technical Summary

Problems solved by technology

[0007] The technology of bolts is continuously improved, and the performance of bolts is also changing according to the needs. Modern industry has higher and higher requirements for bolts, especially for the strength r