Computer Aided & Optical Design Of Thread Steel Bar

As one of the important steel material products in modern industry, the thread steel bar is used for the architecture primarily. The steel bar produced in our country is not good as that produced by steel developed country in terms of mechanic character, dimensional accuracy etc. It is important to produce high performance and dimensional accuracy steel bar for the marketplace and link orbit of international marketplace. As animportant step, the roll groove design-the selection of the roll groove system andthe determination of the dimension, makes the decisive effect on the dimensional accuracy and the mechanic character of the tread steel bar.This article discussed the development and the basic design methods of the "Computer Aided Roll Pass Design" , researched and analysised the CARD technology systematically. This research job analysised the extending roll pass system the finish roll pass system and the ultimate roll groove. The mathematical models and experience formulations used for roll pass design are corrected according to the basic theory and the practical experience of the engineerings. The thread steel bar CARD was set up with the visual program tool-VisualBasic6.0, based on the method of the structural program design. This system has the friendly windows for dialogue between person and machine, can draw and label the plan of each roll groove with the way of parameterization drawing, under the condition that giving the size of the rough blank the specifications of the finished product and the technical parameters of the roll, selecting the minimum consumption as the target function, adopting the optimization, adopting the boundary condition of the grip the strength of roll and the check of the power-generating. Moreover, the plan can be outputted in the software of AutoCAD. In addition, the design result can be outputted in the format of text, referred by the engneerings.This paper based on the theory and the practice. The mathematical models established was suitable with the practical procedure, so the thread steel bar CARD system will have the better practicability. Designing with this CARD system can shorten the design cycle of the new product, lowering the consumptions of the mills and the production cost, advancing the dimensional accuracy and the mechanical character of the finished thread steel bar. It has the important significance for increasing the economic benefit of the enterprise.