What is cold heading forging process?
Cold heading forging, also called block forging, is an advanced flash-free precision forming technology. Under this process, when the mold tooth profile accuracy reaches level 6, the gear accuracy can reach level 8-9 under mass production conditions. Such products are generally suitable for use in trucks and light vehicles, and are particularly suitable for low-speed, heavy-load and high-noise working environments.
However, during long-term use, the failure mode of cold heading forged gears is mainly tooth surface failure, and its proportion is higher than tooth body failure. Common failure modes are wear and pitting corrosion.
What is hot precision forging process?
The hot precision forging process usually adopts the "one fire, two forging" technology, that is, after the gear is hot forged and trimmed, the waste heat of the forging is used for finishing. After this process, the accuracy of the gear can usually reach level 8-9. After years of development, hot precision forging technology has been widely used in the mass production of gear parts and has significant advantages in precision mold manufacturing.
Summarize
Whether it is cold heading forging or hot precision forging, each has its own applicable fields, advantages and disadvantages. Cold heading forging is suitable for low speed and heavy load conditions, but attention needs to be paid to tooth surface wear and pitting corrosion. Hot precision forging can improve production efficiency while ensuring high precision, and is suitable for application scenarios that require higher precision.
