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A Study Of The Die Roll Height Of SHP-1 And SCP-1 Materials In The Fine Blanking Process

Lee C. K., Kim Y. C.

Archives of Metallurgy and Materials

2015

Vol. 60, iss. 2B

1397--1402

The height of the die roll, the distance of the V-ring, and the shear rate were varied with the aim of investigating the effects of the applied changes on the fine blanking line in a cold-rolled and a pickled steel sheet, referred to as SCP-1 and SHP-1, respectively. Both materials consisted primarily of a ferrite phase with small amounts of impurities including F, Mn, and Cr. The distance was found to be a very important factor in controlling the shear of the V-ring in the fine blanking process. When the position of the V-ring was set at distances of 1.5 mm and 2 mm, the die roll height increased with increasing shear speeds from 6.4 m/min to 10 and 16 m/min. Analysis of the influence of the shear rate revealed that low rates resulted in the lowest die roll heights since the flow of material was effectively inhibited.

A note on p-injectivity

Yue Chi Ming R.

Demonstratio Mathematica

2004

Vol. 37, nr 1

45--54

This note contains results related to p-injectivity and YJ-injectivity. Conditions are given for rings to be (i) V-rings; (ii) VNR; (iii) self-injective regular or strongly regular. A characterization of principal ideal quasi-Frobenius rings is given in terms of p-injectivity. A condition is given for a fully right idempotent ring to have a von Neumann regular classical left quotient ring. It is also proved that if A is a fully right idempotent, right Goldie ring, then every two-sided ideal of A is generated by a central idempotent.