Forging technology for gear transmission head with rod part

Abstract

The invention discloses a forging technology for a gear transmission head with a rod part. The forging technology includes the following steps that firstly, a blank is selected, wherein the long-bar-shaped blank with the diameter of 15 mm and the length of 235 mm is selected; secondly, the blank is heated, wherein induction heating is conducted on the part, with the length of 95 mm, of the blank to the temperature of 800-850 DEG C; thirdly, head heading is conducted, wherein an electric heading machine device is used for heading the heated part of the blank, and the heated part of the blank is integrally headed to be 186 mm from 235 mm; fourthly, dummying and bending are conducted, wherein the 30 mm position of the heated part of the blank is bent by 90 degrees, and the headed head is kept to be perpendicular to the rod part; fifthly, finish forging is conducted, wherein the blank obtained after dummying is put into a finish forging cavity, the heated head is molded, and the accurate appearance of a part is forged; sixthly, trimming is conducted, wherein the forge piece obtained after finish forging is put into a trimming die, and the forge piece and trimmings can be separated under the shearing action of the part and a lower die; seventhly, cooling is conducted, wherein the forge piece obtained after forging is put into a heat insulation box to be slowly cooled to the room temperature; and eighthly, heat treatment is conducted, wherein the forge piece is heated to 600-750 DEG C and subjected to heat insulation and then is cooled along with a furnace. By means of special technology processes, inner and surface defects such as cracking, folding and decarbonizing of a product are avoided.

Description

technical field [0001] The invention relates to a forging process of a gear transmission head with a rod, and belongs to the technical field of forging processing. Background technique [0002] The gear drive head with shaft is suitable for heavy-duty environments and requires high strength and hardness. Therefore, martensitic stainless steel is usually used as raw material for forging. [0003] In general, martensitic stainless steel has higher strength, can be strengthened by heat treatment, has good mechanical properties and high temperature oxidation resistance. This kind of steel has good corrosion medium in the atmosphere, water and weak corrosion medium such as saline solution, dilute nitric acid and some organic acids with low concentration, and the temperature is not high. [0004] 11cr17 is a high-carbon, high-chromium martensitic stainless steel with a carbon content (mass fraction) of about 1%. In order to improve corrosion resistance, on the basis of Cr13 stai...

AI Technical Summary

Problems solved by technology

[0005] However, 11cr17 steel has high carbon content, and it is difficult to control the temperature during forging. It may encounter problems such as decarburization, cracking and folding. It is a more difficult forging steel type.