【正文】 ition of the control handle it is necessary to determine the speed. These disadvantages must be eliminated in the design of new machines, It is also necessary to improve removal of accumulated metal dust from the horizontal portion of the exhaust line, which is in a difficult to reach location about 4 m above the floor tevel. To provide more convenient placement of the individual units of the shot blast machine and simplify i~maintenance, the Institute of Ferrous Metallurgy has developed and turned over to Zaporozhstal Plant remendations which have been partially put into use on the existing machine and will be studied in designing similar new machines. The improvement in the SM2 pneumatic shot blasting machine has made it easily possible to controt and maintain the specified sequence for blasting work rolls for cold rolling and skin pass sheet stands. As a result, Zaporozhstal Plant is mass producing cold roiled constructional sheet with a surface roughness meeting Ferrous Metallurgy Technical Specifications 168369 and 168669. 8 外文翻譯譯文 用拋丸清理機(jī)對(duì)板材軋輥進(jìn)行拋丸處理 V. I. Meleshko, A. P. Kachailov, V. G. Boikov, V. L. Mazur, T. P, Kobka, 和 I. I. Krivolapov 目前，軋制品的質(zhì)量受到許多關(guān)注，特別是板料。 薄鋼板 最終 微 表面的形成是通過對(duì)已用金屬球粗加工過的表 面進(jìn)行工作輾壓得到的。 拋丸過 程中的穩(wěn)定性也是由送入噴管的彈丸的數(shù)量所決定的。機(jī)器的連續(xù)工作使磨料通過沒有控制裝置的三至四個(gè)噴管，在磨料增加到標(biāo)準(zhǔn)要求 650kg 后，上述彈丸的運(yùn)輸才變?yōu)榭赡堋Ｄチ仙涞杰堓伇砻媸峭ㄟ^一個(gè)安裝在肘形槍管（圖 2）上的噴管完成的。在這個(gè)氣壓下，即使用尺寸最合適的彈丸，輥的粗糙度也在上限（粗糙度為 ） 。排氣線的水平部分累積的金屬垃圾的清除也有必要改善。然而，觀察輥表面的拋丸過程是很困難的。 在 臺(tái)車 重量 和 它 沿著導(dǎo)軌 運(yùn)動(dòng) 導(dǎo)致的振蕩的作用下 ，傳送帶離開對(duì)準(zhǔn)線。這一堆彈丸阻塞在垂直管內(nèi)，阻礙了磨料沿著垂直管到達(dá)收集室的過程，也打亂了拋丸過程中彈丸拋向空中的最佳比例。裝載噴口由控制裝置輪流打開。整臺(tái)設(shè)備的總重量是 15 噸。 4. simplicity in control and convenience in maintenance. The SM2 machine (Fig. 1) consists of a stationary closed chamber ! with a trolley on wheels aad movab!enozzles 2~ which under the action of pressed air discharge shot on to the roll surface, a worm conveyor 8, an elevator with a separator 4, the shot blast equipment 5, and an exhaust system 6. The equipment is mounted on a special foundation 1905 mm below the floor level The length of the machine withthe trolley out is 15fl00 ram, the height 4070 ram, and the width 4600 mr~ The dimensions of the rolls handled are 400500 mm in diameter and 20204000 mm in length. The total weight of the equipment is 15 tons. As research has shown, the dynamics of the wear of a working mixture of abrasive and the original condition of the shot changes during operation. During blasting, the shot takes on a wider size range and is worn down, forming many fine particles. The conditions under which the parts are blasted depend upon the size of the shot used. The contamination of the specified size by fine particles disrupts the process, producing a poor quality surface on the rolls and consequently on the sheet. To eliminate these problems it is necessary to either 3 regularly measure the position of the shot and make appropriate changes in the blasting sequence, which is difficult to do in practice, or to screen the shot during operation of the machine to provide the specified particle size. Stability in the blasting process is also determined by the quantity of shot delivered to the nozzles. It was experimentally established that supplying kg/sec of shot to the two nozzles in operating with an air pressure of atm provided stable operation. Equipping the mac