Cold forming is a plastic processing technique in which plastic deformation is applied to room temperature materials, and a shape is formed in a die which is close to the final (net) shape. Tsukiboshi has taken this technique and is working towards achieving ‘near-net shape’ production. As long as the die can be designed to suit, it can work even for complex shapes, and a high standard of dimensional accuracy and surface smoothness can be maintained.
And since forming can be carried out without cutting the grain flow (grain texture) of the material, superior strength can be achieved. Compared with warm or hot forming, cold forming is characterized by a high degree of processing accuracy with a reduction in manufacturing steps. In addition, dies last longer, there is less scrap, and material is not being wasted, which leads to big gains in production efficiency and cost reduction. At Tsukiboshi Manufacturing, we have used our own unique innovations since our inauguration to advance cold forming techniques.
It is now a core technique which is indispensable in meeting our customers’ increasingly sophisticated and diversified needs.

Secondary processing is a finalizing process in which near-net shape product blanks created in the cold forming process undergo precision processing. At Tsukiboshi Manufacturing, we stretch the boundaries of plastic processing by striving to get a near-net shape by making use of cold forming, thus creating a finished product for the customer while reducing waste from cutting in the secondary or tertiary processing stages. These processes highlight the limits of deformation processing.
The main processing techniques are cutting, grinding and thread rolling, and in surface reforming there is shot blasting and polishing. In addition, modifying the mechanical property of materials involves heat treatment, which we carry out by working closely with a partner factory.