Blanking is the process of cutting or shearing blank from sheet or strip material.
In the production of many articles from sheet metal under a press or by spinning, the process of blanking is often the first operation in the production cycle. Simply expressed, blanking is the process of shearing from sheet or strip metal a blank of a given shape. The term normally implies two things:
(i) The process is carried out under some type of press, and
(ii) The entire edge of the resultant blank has been subjected to a shearing operation.
Reduced to simplest terms, a set of blanking tools consists of a bed and punch. The latter is attached to the ram of the machine and the former is clamped to the bed to the press. When the tools are set, the punch should first enter the bed without touching the sides in such a manner as to damage the cutting edge. The clearance between the cutting edges is regulated to suit the bed for the minimumm distance necessary to give complete shear. If it is permitted to enter too far, the punch is subjected to unnecessary wear. With tools in position and properly set, the tail end of surrounding metal cannot enter, hence is sheared off. In order to obtain a blank free from burr, that is, with a clean sheared edge particular attention should be given to the clearance and condition of the cutting edge.
Credit:- Author- R.K.RAJPUT
In the production of many articles from sheet metal under a press or by spinning, the process of blanking is often the first operation in the production cycle. Simply expressed, blanking is the process of shearing from sheet or strip metal a blank of a given shape. The term normally implies two things:
(i) The process is carried out under some type of press, and
(ii) The entire edge of the resultant blank has been subjected to a shearing operation.
Reduced to simplest terms, a set of blanking tools consists of a bed and punch. The latter is attached to the ram of the machine and the former is clamped to the bed to the press. When the tools are set, the punch should first enter the bed without touching the sides in such a manner as to damage the cutting edge. The clearance between the cutting edges is regulated to suit the bed for the minimumm distance necessary to give complete shear. If it is permitted to enter too far, the punch is subjected to unnecessary wear. With tools in position and properly set, the tail end of surrounding metal cannot enter, hence is sheared off. In order to obtain a blank free from burr, that is, with a clean sheared edge particular attention should be given to the clearance and condition of the cutting edge.
Credit:- Author- R.K.RAJPUT
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