25-08-2017, 09:32 PM
Abstracts: This invention relates to a rolling mill apparatus and a method of shape control of a rolled rod which enables satisfactory shape control even in extremely small rolling. A rolling mill apparatus of this invention has a rolling mill, which rolls a rolled rod between upper and lower work rolls; a shape detecting portion, which detects the degree of flatness of the rolled rod in the width direction of rolled rod which has been rolled by the rolling mill; a spray portion, having a plurality of spray nozzles arranged along the length direction of the upper and lower work rolls, which sprays the upper and lower work rolls with coolant C; and, a shape control portion, which adjusts the spray amount and/or temperature of the coolant C sprayed from the spray portion based on detected information from the shape detecting portion, to control the shape of the rolled rod . The shape control portion has two control modes, in which the relationship of the detected information of the shape detecting portion and the spray amount and/or temperature of the coolant C sprayed from the spray portion are inversely proportional, and switches between these two control modes based on the rod size of the rolled rod.The hardness of a material varies depending on the composition of material, and how it is treated when processed. In this module, students observe the changes in hardness of brass resulting from different percentages of rolling, along with the accompanying changes in micro structure. The brass samples are subsequently annealed, and changes in hardness and micro structure demonstrated. These are shown using a Power Point presentation, intended as an introduction the effects of rolling and annealing on material properties. No testing equipment is needed for this module.