Cold Stamping & Forming Technology

Cold press forming is a kind of processing technology that uses stamping equipment and molds at room temperature to make various kinds of sheet materials of different specifications change into the required shapes under the action of pressure. The cold press forming of materials is related to the material properties, which generally require the materials to have good mechanical properties, large deformation capacity and ideal metallurgical organization, among which, the mechanical properties include the yield strength, tensile strength, elongation, hardness, plasticity strain ratio r and other parameters of the material.

The formability of titanium alloy sheet at room temperature is very limited, and its room temperature mechanical properties and microstructure exhibit flow lines with obvious anisotropy, which are prone to defects during the forming process. Therefore, cold forming technology is only suitable for the processing of titanium alloy sheet.

Superplastic forming technology

Superplastic forming is the use of metal materials at a certain temperature and strain rate under the superplasticity (with superplastic material can be elongated a number of times without necking and fracture), the billet processed into the required size and shape of the process. Generally, superplastic forming is a process of applying gas forming pressure to one or both sides of a titanium alloy plate under sealed conditions, relying on the thinning of the plate to obtain a structural part shape similar to the mold cavity. Superplastic forming process has the advantages of good formability, large deformation, high dimensional accuracy, good surface quality, no residual stress, reduce the number of parts processing, etc. It is not easy to rebound, rupture and other phenomena occurring in the traditional forming process of the plate, and shows great superiority in reducing the weight of the aircraft structure and reducing the production cost.

According to the conditions for realizing superplasticity, superplasticity is mainly divided into phase change superplasticity and tissue superplasticity. Phase change superplasticity, also known as dynamic superplasticity or environmental superplasticity, refers to the material at a certain temperature and under the condition of applied load, through many cycles of phase change or isotropic transformation to obtain a large elongation. The realization of tissue superplasticity generally needs to meet the organizational conditions, strain rate conditions and temperature conditions.

Spin molding technology

Spinning is a traditional molding process, which is characterized by small deformation force and raw material saving. In recent years, with the introduction of mechatronic control, high-precision real-time measurement and big data artificial intelligence technology, spinning forming technology and equipment has been developed significantly, and has become an important method of metal pressure processing. At present, spinning equipment is developing in the direction of serialization and standardization. In many industrially developed countries, the degree of standardization of spinning equipment is very high, the spinning forming process is stable, the products are diverse, and the scope of application is increasingly wide.

Hot push forming technology

Hot push forming is a ring pipe and elbow products commonly used forming method, which uses a special elbow push system, elbow forming mandrel and induction coil heating device, so that the set of blanks on the mold tube in the push system under the impetus of forward movement, heating, expansion and bending forming process. This forming method avoids the phenomenon of uneven wall thickness of the bent pipe caused by the convex edge of the wall being thinned by pulling and the concave edge of the wall being thickened by pressure during the forming of the bent pipe by the traditional bending process, which is of great significance for the preparation of high pressure vessels for aerospace applications.

Hot-die forging forming technology

Hot-die forging is one of the common methods of titanium alloy processing and forming, which makes full use of the characteristics of titanium alloy with low rheological stress at high temperature and easy to form, and processes it into various shapes of products. Compared with isothermal die forging, hot die forging has lower cost and higher productivity.