Cold Forging

Cold forging is a metal shaping & manufacturing process in which bar stock is inserted into a die and squeezed into a second closed die. The process, completed is at room temperature or below the metal’s austenite temperature; to form a metal into a desired shape or configuration. It is an efficient and economical metal deforming process for the production of high volumes of parts at low cost. There are three methods of forging that differ according to temperature, which can be cold, warm, or hot and involve the use of hammers, dies, or presses to shape, squeeze, deform, and roll metals. It should not be confused with machining or casting since the end result is a stronger and higher quality product. Unlike warm or hot forging, cold forging shapes and deforms bar stock at room temperature using localized, compressive force. Depending on the requirements of the parts design, the workpiece may pass through multiple dies or be struck several times in succession to achieve the proper shape.


The low cost of cold forging is due to the reduction in labor costs and the removal of secondary processing. Parts are rapidly and efficiently produced at rates as high as 1000 per hour, which lowers the per unit cost. Production is simply a matter of feeding a coil and letting the machines quickly and cost effectively do the work. Finished products from cold forging have perfect surface finishes and improved dimensional stability as can be seen in the image below. The different processes enhance the strength and durability of the workpiece producing long lasting products or parts. The process is particularly suited to high production rates and is ideally suited to the needs of high volume industries such as automotive, machinery, automation, electronics. In the absence of heating the billets, the pressure exerted by the presses is higher than with other forging processes and therefore requires the use of powerful presses.


Advantage of Cold Forging:



Proto MFG specializes in cold forging, and we are ISO certified, so you know you can trust our products for quality and value. We provide service for a wide variety of industries, including transportation, gears, fabrication, power generation, and many others. Single or multiple die designs available. Various materials include aluminum, copper, brass, bronze, gold, carbon steel, platinum. Secondary operations such as knurling, tapping, threading, and roll forming available. Proto MFG is one of the best cold forging supplier in China supplying quality cold forged parts to OEMs.

cold forging
Cold forging