Hardware stamping parts can also be subdivided into a lot of processing technology, today, a rotary processing process is toned. The so-called rotation process is cleverly utilized a strip tool called \”drive rod\”, pressurized to the metal plate in high-speed rotation close to the mold, and presses the metal plate mold into a variety of cylindrical products. The rotary processing can form a rotating body composed of a plurality of curves such as cylindrical, cylindrical, and parabolic, and can produce a complicated stamping die part.
Hardware stamping parts have a wide range of applications. The product of the rotating part can be used in a stamping process. There is a shortcoming in stamping, that is, the productivity is low. Most of the products used for small batch production are higher than normal stamping parts. Rotary processing includes: pulling a deep rotation, shear rotation (tapered thin rotation), cylindrical deformation, shrimping, shrinkage, bulk, rolling, corrugated, corrugated rib sheet metal stamping surface finishing, etc. Suitable for spinning processing materials: iron, aluminum, stainless steel, copper, brass, carbon steel, silver and other metal materials. Among them, carbon steel, aluminum plate and stainless steel plate have a large share. Rotary molding has the following characteristics.
(1) Short production cycle and low product cost
The mold is not required to be a general stamping process, the core die is one, single mode, and the structure is very simple. The spinning wheel is very versatile, and the rotary compression molding is short. Rotary modifications can change the shape of the blank, high material utilization, low product cost. The rotating molding is to clamp the hollow blank of the sheet on the core, drive the core by the rotary press.
(2) The degree of deformation is large and the adaptation range is wide During the spinning process, the material is extruded by the spinning wheel. The workpiece material between the rolls and the mandrel belongs to the three-dimensional pressure stress, belongs to local plastic deformation, with strain dispersion effect. Greatly, the plasticity of the material is given, and a large deformation is obtained. Many materials that are difficult to processed by ordinary stamping are used for spinning. (3) Improve material performance During the rotation process, the grains of the material are refined and elongated along the bus bar of the workpiece, thereby improving the yield strength of the stamped material, the limit Hardness and mechanical properties. Rotating forming has advantages in a metal forming article having an abnormal shape and having a large thickness. For metal stretching, stamping, and stretching of the same thickness is 3-5 times that of the spin pressure. When the metal wall thickness exceeds a certain value, the rotation ratio stamping and drawing is more advantageous; there are a variety of rotation processes, including bulging, turning, rolling, shrinkage and turning. Spinning has a good process flexibility in the shaped part. Most products have a fast productivity is not as fast as stamping and stretching. The stamping and stretching of the same shaped product requires many processes, which means that the stamping and stretching loading and unloading requires more labor, and the turnover of the product is more complicated. It requires a large-area turnover process, and the spinning process is less. Most of them can be formed once, one person can operate multiple machines, saving labor costs and stamping plantscost.