The precision forging process of straight bevel gear are simulated by using finite element software DEFORM-3D. key parameters (heating temperature, upper die movement velocity, friction factor, web thickness and the height) forming optimized orthogonal test. Taking minimum load good corner filling as goals, technological for obtained, that is, heating temperature is 1200 degrees Celsius, veloci...

Traditional fibre-optic drawing involves a thermally mediated geometric scaling where both the fibre materials and their relative positions are identical to those found in the fibre preform. To date, all thermally drawn fibres are limited to the preform composition and geometry. Here, we fabricate a metre-long crystalline silicon-core, silica-cladded fibre from a preform that does not contain a...

The synthesis of a high-melting temperature semiconductor in a low-temperature fiber drawing process is demonstrated, substantially expanding the set of materials that can be incorporated into fibers. Reagents in the solid state are arranged in proximate domains within a fiber preform. The preform is fluidized at elevated temperatures and drawn into fiber, reducing the lateral dimensions and br...

Friction has an important influence in metal forming operations as it contributes to the success or failure of the process. In the present investigation, the effect of friction on metal forming was studied by conducting compression tests of cylindrical Al-Mg alloy using Finite Element Method (FEM) technique. Three kinds of compression tests were performed. For the first test, a constant coeffic...

OBJECTIVES Direct-filling resin composites are used in relatively small restorations and are not recommended for large restorations with severe occlusal-stresses. The aim of this study was to reinforce composites with fiber preforms, and to investigate the effects of layer thickness and configurations on composite properties. It was hypothesized that fiber preforms would significantly increase ...

Abstract The current study presents a novel Tailored Forming process chain developed for the production of hybrid bearing bushings. In first step, semi-finished products in form locally reinforced hollow profiles were produced using new co-extrusion process. For this purpose, modular tool concept was which steel tube made case-hardening steel, either C15 (AISI 1015) or 20MnCr5 5120), is fed lat...

precision forging process is widely used for the production of spur gears due to its advantages such asimproved strength and surface finish, little waste of materials and reduction in the machining time ofthe gear. an important aspect of precision forging process is the load required to perform the processsuccessfully and design the forging tools. in this research, a new kinematically admissibl...

Abstract The current study strives to improve the precision and accuracy of a die reduce unnecessary production steps. Upset cold forging for thick coin-like carbon steel parts were studied redesigned single operation. slug used in this experiment was an annealed AISI 1020 bar sheared into cylinders having height diameter ratio (h 0 /d ) 2.07. design problem is prevent inclined surface due roug...