The six die six punch forming cold upsetting machine is more accurately called "cold forming machine for cylindrical parts", because in addition to being used to process nuts (in fact, if only nuts are processed, five stations are enough), it can also implement upsetting, forward extrusion, reverse extrusion and closed extrusion (radial expansion) processes to process cylindrical parts with small length diameter ratio, such as pipe joints and spark plugs. Corresponding to the "cold forming machine for cylindrical parts", there is a so-called "cold forming machine for rod parts", which is commonly referred to as the five station bolt cold upsetting machine.

The design goal of the three station machine of the six die six punch forming cold heading machine is to process conventional/low strength products. With the widespread application of high-strength products and the emergence of a large number of special-shaped products, the three station computers are increasingly exposing their functional defects. The effective process for high-strength products is the secondary necking (large material with small deformation) process, and the special-shaped products require multiple upsetting. Three station machines are difficult to implement these processes, so they are gradually eliminated and replaced by four and five station machines. It is recommended to purchase a multi station computer. If conditions permit, it is better to use a four or five station computer, at least a four station computer. Practice has proved that the four station machine is more reasonable and economical than the three station machine, even if conventional products are produced. On the surface, there are many four station molds. In fact, the mold structure of the four station process is more reasonable, has a longer life, is easier to manage, and is more economical. For example, for the trimming hexagon head bolt, the three station cold heading process is: initial punching - fine blanking and necking - trimming. The second station fine blanking lower die is a combination die, which contains a necking die core that is closely matched with the die sleeve (cylindrical surface matching or conical surface matching) and whose axial position is fixed, and it is only suitable for one product length; To adapt to all product lengths within the functional range of the machine, multiple sets of molds must be available.