機(jī)械專(zhuān)業(yè)畢業(yè)設(shè)計(jì)(論文)外文翻譯---用拋丸清理機(jī)對(duì)板材軋輥進(jìn)行拋丸處理-資料下載頁(yè)
2025-05-12 00:18本頁(yè)面
【導(dǎo)讀】目前，軋制品的質(zhì)量受到許多關(guān)注，特別是板料。這從相當(dāng)大的程度上取決于軋。許多公司著手提高軋輥表面處理的質(zhì)量，為輾壓作準(zhǔn)備。者來(lái)自Zaporozhstal公司，Magogorsk冶金聯(lián)合企業(yè)的人員，有色冶金研究所,Dnepropetrovsk和Magogorsk采礦和冶金學(xué)院，來(lái)研究這個(gè)現(xiàn)實(shí)的問(wèn)題。這塊板料部分的最終質(zhì)量有影響。薄鋼板最終微表面的形成是通過(guò)對(duì)已用金屬球粗加。工過(guò)的表面進(jìn)行工作輾壓得到的。在使用中的經(jīng)驗(yàn)表明國(guó)家鋼鐵廠使用的氣動(dòng)機(jī)不能滿足輥板表面拋丸處理的高。究了SM-2型拋丸清理機(jī)，發(fā)現(xiàn)了一些它結(jié)構(gòu)上的缺點(diǎn)。拋丸機(jī)設(shè)計(jì)的基本要求是確定的。拋丸過(guò)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。Zaporozhstal公司在SM-1和TsKb_P-1拋丸清理機(jī)的實(shí)際操作經(jīng)驗(yàn)都證實(shí)了這一點(diǎn)。格，并配備一個(gè)電子氣動(dòng)控制裝置。到標(biāo)準(zhǔn)要求650kg后，上述彈丸的運(yùn)輸才變?yōu)榭赡堋Ｒ虼?，在?duì)一個(gè)輥板進(jìn)行拋丸后有必要關(guān)閉機(jī)器將累積的彈丸推到。個(gè)問(wèn)題，而且使輥表面質(zhì)量變得更令人滿意。
【正文】 ight angle, but glancing, which produces a poorer surface quality. Placing a strip under the gun eliminated this problem, and the roll surface quality became satisfactory. In the first period of operation the pressed air tn the SM2 machine was obtained from the shop main i39。,ine, which has a pressure of 6 atm. According to readings on a manometer placed before the collector of the shot btaat unit, the air pressure in it did not exceed aim. With this pressure, even with the use of the finest shot (), the roughness of the rolls is at the upper limit (R a = ). Therefore, it was necessary to reduce the working pressure of the air. An air valve was used to control the pressure, but it was very sensitive to changes in air pressure, and operation of the shot blast machine was unstaSle. As a result, a reducing valve was placed between the oil moisture separator and the shot blast equipment. This made it possible to control the air pressure in the collector from to atm with an accuracy of atrr. The use of this valve provides stable operation of the shot blast equipment. To blast rolls of different diameters it is necessary each time to change the position of the blast gun, which is not provided for in the design of the SM2 machine. For example, at the present time to blast a 400 mm diameter roll after a 500 mm roll the machine must be shut down for adjustment. In designing new shot blast machines the possibility of changing the height of the gun must be specified. To observe the blasting process, special observation windows were cut in the long wal! of the lighted working chamber. Noheless, observation of the surface of the roll being blasted was difficult. Therefore, three additional 500 W lights, protected by louvers, were placed on the ceiling of the working chamber. 14 Fig .3 Control of the machine (Fig. 3) is from the control panel 2, the valve 5 at the air line, the rheostats for con. trolling the speed of rotation of the roll and the movement of the nozzles, and the push bu~on for starting up the exhaust fan motor, which is behind the machine. Such an arrangement of the SM2 shot blast machine equipment is not convenient for control The rheostats for controlling the speeds do not have graduated scales, which makes choice of the correct speed difficuR. Actual: 15 for each new position 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.
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