El trueque es el presente y el futuro del comercio internacional, especialmente para las personas que se inician en el negocio de importación y exportación. El trueque y más, operaciones triangulares.
La segmentación perfecta para sus propuestas de negocio, Sus lugares de destino, además de su clase de clientes objetivo, además de sus artículos y categorías.
Ring forging is the product of forging industry, a type of forgings. Is the metal billet (not including plate) to apply external force, through the plastic deformation molding requirements into the appropriate compression force of the annular objects. This force is typically achieved by the use of a hammer or pressure. The forging process builds a fine granular structure and improves the physical properties of the metal. Ring forgings can be seen everywhere in our daily life, which is an industrial product. Ring forgings have a history of thousands of years in China. Machine forging is carried out with forging tools on various forging equipment. According to the different equipment and tools used, machine forging can be divided into four types: free forging, mold forging, die forging and special forging.
1. According to the different compression and deformation directions of ring parts in the rolling process, it can be divided into radial rolling and radial and axial rolling.
2. According to the different groove forms of the reaming machine, the rolling process can be divided into two kinds: open rolling and closed rolling.
