Stress State During The Forming Process After the strip is processed into a spiral tube blank, the stress generated by the tube wall is mainly affected by the forming force during the strip forming process. According to the plastic deformation theory, when the relative bending radius of the strip is equal to 100, the plastic…
What Is Semi-Solid Technology? Semi-solid technology refers to the use of heating materials to a semi-solid state to form a semi-solid structure in which the solid phase and the liquid phase are uniformly mixed. The solid phase rate is controlled by adjusting the heating temperature and time, and processing is performed in this state. Methods.…
Semi-Solid Deformation Theory 1. Dendritic stirring fracture theory The core of the semi-solid billet is to generate non-dendritic equiaxed crystals, and the material is stirred in a semi-solid state. During the stirring process, the stirring force and speed are increased, and the shear force of the crystal grains is The impact from the liquid will…
Mechanical Stirring Method And Electromagnetic Stirring Method 1.Mechanical stirring method The mechanical stirring method is the oldest and simple stirring method. It is different from the electromagnetic stirring method in that the stirring function is realized by the rotation of the blade or the stirring rod. The principle of forming the non-dendritic crystal is similar…
Microforming Process System Like the traditional forming process, the micro-forming process system is composed of four parts: material, forming process, tooling, and equipment (including tooling). In the micro-forming process, it is also necessary to consider the design of the mold, the optimization of the process parameters, the wear and treatment of the material, etc., but…
Micro-Molding Materials And Micro-Mold Manufacturing At micro-dimensions, various properties of the material have changed, and theoretical models at the macroscopic level can no longer be used to explain changes in materials during micro-forming. Therefore, experiments are needed to study the effects of material grain, surface grain and internal grain size, and material anisotropy during microforming,…
Laser Welding The laser welding technology has a solution purification effect, which can purify the weld metal and is suitable for welding between the same and different metal materials. Laser welding has a high energy density and is particularly advantageous for metal welding with high melting point, high reflectivity, high thermal conductivity and physical properties.…
Application Of Electron Beam Rapid Prototyping Technology The electron beam rapid prototyping technology using electron beam as a processing heat source can not only prepare a three-dimensional structure of titanium alloy, but also has great advantages in preparing a porous structural material. According to the differences in its characteristics and performance, it can be divided…
Shape Design Of Profiles 1.Vacuum setting The close contact between the profile and the sizing device is achieved by vacuuming the vacuum grooves and holes in the outer wall of the given device. If there is no floating plug in the profile, just increase the atmospheric pressure. However, for closed hollow profiles, there are a…
Fuse Injection Molding Technology Fuse injection molding has developed into a specialized injection molding branch. With the demand for polymer materials in the automotive industry, some parts have been mass-produced. For example, the tennis racket handle is the first large-volume production of molten core injection molded products; The all-plastic integrated intake manifold of the automobile…