PRODUCTION METHOD OF LONG SCALE STOCK AND SHORT SCALE STOCK OF CARPENTER'S SQUARE

摘要

PURPOSE: To effectively and surely execute a joining operation by forming a non-rolled part without existence of a recessing groove at a joining end part in a time making a right angle state by joining a stock of long scale piece and a stock of short scale piece. ;CONSTITUTION: Inclining surfaces inclining both sides toward outer sides are formed on inside and outside of a hoop material 5 by continuously feeding the hoop material 5 wound in a roll like to a rolling roll, and a recessed groove is formed on a central part in a longitudinal direction by leaving this inclining surface. The formation of this recessed groove is executed so as to form a non-rolled part 7 without existence of the recessed groove on every definite interval L. This hoop material 5 is cut at a position a-line of the non-rolled part 7 after executing quenching, etc. A suitable hoop material 5 among the cut hoop material is further cut at a b-line. When it is cut at the a-line, a long scale stock 2 is formed, when it is cut at the b-line, two stock of short scale pieces 3 are formed, and the L is decided in considering them. When the non-rolled parts of the stock of long scale piece and the blank of short scale piece, and an L shaped joining member are welded, the stock of carpenter's square is produced.;COPYRIGHT: (C)1994,JPO&Japio