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Metal Fabrication Processes - Guillotining, Shearing, Cropping and Notching
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Guillotining or metal shearing is a process used to cut steel and other metals to size with a shearing action. Guillotines come in different sizes with lighter ones being for thinner gauge metals and large, robust machines being used for heavy gauge steels. The material is fed into the guillotine to the correct position for the desired size. When the guillotine is engaged, a heavy flywheel stores a large amount of kinetic energy which drives the guillotine blade down rapidly to shear off the material.
Guillotine cutting is a very quick and cost effective process. Stops can be set up and a large volume of material can be cut to size in a short time. CNC guillotine machines are also available for high volume production.
The disadvantages are that some deformation of the cut edge takes place and the cut itself has a fairly rough appearance. Guillotining is an ideal process for parts not requiring visual appeal or which are to be subsequently welded into fabricated assemblies.
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