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Rolling is the process of passing plastically deforming metal between a pair of rolls rotating in opposite direction placing one (cw rotation) above the other (ccw rotation) maintaining certain gap(will be explained in future postings) between them. During the process of deformation of metal passing between rolls, is subjected to high compressive forces generated by rotating rolls. This leads to high compressive stresses, because of the friction generated between the surfaces of the rotating rolls and metal. As the metal is under compression, it gets squeezed between the surfaces of pair of rotating rolls, the thickness of metal reduces and length increases (i.e. reduction in cross sectional area). Rolling is generally a hot working process unless specifically mentioned as cold rolling.
Basing on the temperatures of metal, rolling is classified into two processes,
1.Hot rolling 2.Cold rolling
Grooved rolls are rolls which are machined from blank rolls in CNC machine shop, of roll shop of rolling mills in steel industry. Grooved rolls are turned on CNC lathes according to the tool paths generated from CNC programs developed manually or any cam packages like Edge cam Mastercam, and Gibbs cam etc., by CNC programmer. These grooved rolls as a pair, are used in rolling mills for metal deforming process called rolling.
A branch point in Mastercam chaining, is a point where the end point of two or more entities meet. While creating geometry, for example to create hatch in specific region “BCDEB” of a boundary “ABCDEA” as shown in figure, I have drawn an entity line from one point B to point E in that boundary. That line separated full boundary “ABCDEA” into two regions as ABEA and BCDEB as shown in image. Then clicked on Mastercam create menu, drafting and X-hatch. It asked me to select pattern. I selected pattern and set the parameters clicked ok. Mastercam interface shown the chaining dialog box continuous chaining highlighted by default. I have clicked on entity BC, chaining started from BC and stopped at point E. At point E it shown branch point reached select next branch point. Then I selected the entity EB and click ok, as hatching needs closed boundary and my required region is selected. Later chained region is filled with selected hatch pattern.
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