機(jī)械類外文文翻譯--拋丸清理機(jī)對(duì)板材軋輥進(jìn)行拋丸處理-文庫(kù)吧在線文庫(kù)
【正文】 sratio must be kept constant. Since during blasting it is difficult to make corrections, it was necessary ~o improve the design and increase the wear resistance of the parts. For this purpose a new design of blast guns, in which the diameter of the channels was increased (Fig. 2 b) and the shape of the transition from the channel to the channel and nozzle was changed, was proposed and tested, The new nozzle design is much more effective. After five months of operation,noticeable signs of wear in the elbowand nozzle have not been found, while the old design elbows wore out in a month. 6 The blast guns are moved along the roll by a conveyor belt. Under the action of the weight of the and oscillations caused by its movement along the guides on which shot falling from the surface of the rolls accumulates, the belt gets out of alignment. As a result, the impact of the stream of shot on the surface is not at a right 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。 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質(zhì)量要求。整臺(tái)設(shè)備的總重量是 15 噸。給機(jī)器裝配一個(gè)篩選裝置是一個(gè)保持彈丸尺寸的有效方法。裝載噴口由控制裝置輪流打開。 可用的彈丸是由工作室的收集艙收集的，然后落入蠕蟲傳送機(jī)的接受槽。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。交匯處是一個(gè)直角，這導(dǎo)致了肘形槍的快速磨損，管道和噴管的交界區(qū)域增加。 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。空氣閥是用來控制壓力的，但它對(duì)空氣壓力的變化非常敏感，而且拋丸機(jī)的操作也不穩(wěn)定。然而，觀察輥表面的拋丸過程是很困難的。 為了給拋丸機(jī)的獨(dú)立單元提供更多方便和簡(jiǎn)化它的維護(hù)， 鋼鐵冶金研究所開發(fā)并交給 Zaporozhstal 廠的建議已部分投入在現(xiàn)有的機(jī)器使用， 而且 將研究 設(shè)計(jì) 類似的新 機(jī)型 。排氣線的水平部分累積的金屬垃圾的清除也有必要改善。在設(shè)計(jì)新拋丸機(jī)時(shí)，應(yīng)該考慮改變槍的高度的可能。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 ） 。五個(gè)月的操作后，改良后肘槍和噴管沒有發(fā)現(xiàn)顯著的磨損跡象，而舊的肘槍一個(gè)月后就損壞了。磨料射到軋輥表面是通過一個(gè)安裝在肘形槍管（圖 2）上的噴管完成的。然而，這種干燥方法是不夠的。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?。?dāng)機(jī)器關(guān)閉時(shí)， 出氣孔下降，并且在它和膜片之間 形成了 一個(gè)圓空 5 毫米寬 的圓孔。 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。有小車的機(jī)器的長(zhǎng)度是 15， 200 拉姆 ，高度是 4070 毫米，寬 度 4600毫米。 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。 2. the possibility of controlling air pressure in the collector of the shot blast machine during stable operations。,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 h
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