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Cold bulk metal forming process with using mechanical type simulations. Introduction The aim of the task is to prepare a model of the process of the cylindrical sample compression test with dimensions: diameter=100mm and height=150mm. The sample is to be compress with two flat tools with diameter=200mm each.
Metal forming can be defined as a process in which the desired size and shape are obtained through the deformation of metals plastically under the action of externally applied forces. Metal forming processes like rolling, forging, drawing etc. are gaining ground lately.
Cold working, (or cold forming), is a metal forming process that is carried out at room temperature or a little above it. In cold working, plastic deformation of the work causes strain hardening as discussed earlier. The yield point of a metal is also higher at the lower temperature range of cold forming.
Objectives. By the end of today you should be able to... ...describe different forming processes, when they might be used, and compare their production rates, costs and environmental impacts. ...calculate forming forces, predict part defects (tearing, wrinkling, dimensional inaccuracy), and propose. solutions.
Cold working: Generally done at room temperature or slightly above RT. Advantages compared to hot forming: (1) closer tolerances can be achieved; (2) good surface finish; (3) because of strain
Cold working is plastic deformation of metals below their recrystallization temperature. It is generally performed at room temperature. Advantages: No heating. Better surface finish. Superior dimension control. Improved strength. Directional properties can be imparted (bestow a quality). Contamination problems are minimized.
Based on the nature of deformation force applied on the material, during forming, metal forming processes are also classified into several types as shown below: Forming is also classified as cold forming, hot forming or warm forming. Hot forming is the deformation carried out at temperatures above recrystallization temperatures.
