Development of auxiliary devices for dies for cutting off section rolled products with displacement with a differentiated clamp
Keywords:
billet, rolling, stop, step feed, shear cut, stamp, differential clamp, quality, prime cost.Abstract
Karnaukh S., Chosta N. Development of auxiliary devices for dies for cutting off section rolled products with displacement with a differentiated clamp
Procurement costs make up a significant share in the cost of finished products. Therefore, the task of improving technology and equipment for the implementation of separation processes is relevant. One of the promising ways of dividing long products into dimensional billets is waste-free cutting by shear. One of the progressive separation schemes for long products is the sectioning scheme with an active differential clamp. The profitability of the die operation essentially depends on the mechanization of auxiliary operations, in particular, on the stop device and the rolling feed mechanism. The purpose of the work is to develop auxiliary equipment and mechanisms for feeding the bar into the working area of the die with a differentiated clamping of rolled stock. The analysis of design options for auxiliary devices for dies with differential clamping of rolled products was carried out using the theory of graphs. Based on the analysis of the developed graph of designs of front stops for dies with differential clamping of rolled products, an original design of the stop has been developed in Donbass State Engineering Academy. The proposed design of the stop mechanism allows expanding technological capabilities and improving the quality of cut blanks. The work of the stop is synchronized with the process of cutting off the workpiece, which allows cutting workpieces of any length, including short ones. Since the stop moves against the direction of the bar feed (from the side of the roller table), the rebound of the rolled stock from the stop is excluded, and high precision of cut blanks along the length is ensured. An alternative solution to the use of a front stop is the developed design of a step-by-step feed of rolled products into a stamp with a differential clamp. The proposed design of the step feed provides a more accurate measurement of the length, since it excludes the influence of angular feed inaccuracy, non-flatness, non-perpendicularity of the end, rebound of the bar when hitting the stop. This increases the geometric accuracy and quality of cut blanks and production culture.
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