CAD/CAE application in centering EDM machine design
The centering EDM machine can be completed online centering hole processing. Traveling by the high speed line feed mechanism, low speed line feed mechanism, rotating body, lifting body, auto body for baseball, Swing components, such as buffer baffle. The advantage of this approach is: a small device, processing consistency, and efficient processing, process automation, and effective in the elimination round billet rolling wear puncher into a capillary formed by the iron handle. In order to design the machine, the CAD/CAE technology, basing on the conception of global structure, dwelling on selecting motor, 3D modeling with solidworks, dynamic simulation with cosmosmotion, and analysis the key parts using finite element method were presented.
Development of new material and heat treatment for tools ensuring high performance in hot seamless tube rolling
Abstract A new technology has been developed to improve the life of tools used for high temperature steel rolling in seamless tube manufacturing. It is a joint technology combining a new chemical composition and a special heat treatment. The new steel tool material has high Cr, C, and Ni contents compared with those of the conventional tools in order to increase the volume fraction of carbide which increases wear resistance. Through the new heat treatment, the macroscopic distribution pattern of eutectic carbide changes from meshlike to granular form increasing resistance against crack propagation. The validity of the results in the laboratory has been verified on the production line.
InTlP — a proposed infrared detector material
In1−xTlxP is proposed as a promising material for infrared detectors. A number of key optical and structural properties are studied within local density‐functional theory. In1−xTlxP at x=0.67 and In1−xTlxAs at x=0.15 are estimated to have a gap of 0.1 eV. Their binding energies are larger than that of InSb, and they are found to form stable zinc‐blende alloys for all x. In1−xTlxP nearly lattice matches to InP, and offers the potential to integrate detector array and read‐out circuit.