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-預(yù)覽頁(yè)
【正文】 lt 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。 1 外文翻譯原文 SHOT BLASTING MACHINES FOR THE BLASTING OF SHEET MILL ROLLS V. I. Meleshko, A. P. Kachailov, V. G. Boikov, V. L. Mazur, T. P, Kobka and I. I. Krivolapov At the present time~ much attention is being devoted to increasing the quality of rolled products, partieularly sheet. To a significant degree this depends upon the preparation of the roll surface. Many plants are engaged in improving the quality of working the roll surface in preparing them for article was written by personnel from Zaporozhstal Plant, Magogorsk Metallurgical Combine, the Institute for Ferrous Metallurgy, Dnepropetrovsk, and Magogorsk Mining and Metallurgical Institute on this very real problem.. The surface microrelief, or roughness, of cold rolled constructional sheet has an influence on the mechanical and production properties of metal, and also on the finish quality of parts made from this sheet. The final surface microrelief of thin sheet steel is formed in a skin pass on work roils which have been given a rough finish with metal shot. Normally the rough surface finish on the work rolls of skin pass stands is produced in pneumatic and rotor shot blasting machines. Experience in their use has shownthat the pneumatic machines used in the country39。 3. the handling of work rolls of different diameters (400500 mm) without special equipment on the machine。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。 通常情況下，對(duì)不合標(biāo)準(zhǔn)表面的工作輾壓粗加工是由 氣動(dòng)力學(xué)和電動(dòng) 拋丸 清理機(jī)完成 。機(jī)器必須滿足： 1. 在操作時(shí)一個(gè)持續(xù)的噴丸尺寸，換句話說(shuō)，有效去除已磨 損彈丸的既定尺寸； 2. 平穩(wěn)操作時(shí)，控制拋丸機(jī)收集的空氣氣壓的可能性； 3. 在機(jī)器沒(méi)有特別的設(shè)備時(shí)，對(duì)不同直徑（ 400500mm） 的工作輥的處理； 4. 控制簡(jiǎn)單，維修方便。操作的輥的尺寸是直徑 400500 毫米，長(zhǎng)度 20204000 毫米。在這種情況下，零件的拋丸取決于所用彈丸的尺寸。實(shí)驗(yàn)表明，在氣壓 下 ,提供 。 工作混合物 從上格式 下降到較低的，然后收集。排氣口是一個(gè)大約有 30 度的錐體，彈丸慢慢通過(guò)這一缺口，但不完全，然后彈丸直徑減少到 10 毫米。在拋丸時(shí)由于控制裝置不運(yùn)轉(zhuǎn)，它不能從較高的艙室下降到較低的。然而，解決這個(gè)問(wèn)題的基本方案還是控制裝置的穩(wěn)定運(yùn)行。為了消除這個(gè)缺點(diǎn)，將螺旋傳送器加長(zhǎng)到工作室長(zhǎng)度的一半是可行的。水蒸氣凝結(jié)在主線和拋丸設(shè)備內(nèi)，結(jié)果彈丸在低艙室內(nèi)都粘到一起，形成了堅(jiān)實(shí)的一堆。因此 ，在設(shè)計(jì)拋丸清理機(jī)時(shí)，有必要指定干燥空氣的設(shè)備。槍管的一個(gè)缺點(diǎn)是對(duì)壓縮空氣的混合物和彈丸的節(jié)流作用，節(jié)流處橫向和縱向的管道也在。因?yàn)樵趻佂柽^(guò)程中很難糾正這個(gè)問(wèn)題，因此有必要改善設(shè)計(jì)，增加零件的抗磨損度。 12 噴槍通過(guò)傳送帶沿著輥移動(dòng)。安置小條在肘槍之下解決了這個(gè)問(wèn)題，而且使輥表面質(zhì)量變得更令人滿意。 因此，有必要降低空氣的工作壓力。空氣閥的運(yùn)用使拋丸裝置能夠穩(wěn)定的運(yùn)行。 為了觀察拋丸過(guò)程，燈火通明的工作艙長(zhǎng)壁上開(kāi)了一個(gè)特別的觀察窗。 SM2 拋丸裝置這樣的布置控制起來(lái)不方便，控制速度的變阻器沒(méi)有精確的范圍，這使決定正確的速度變的困難。排氣線難以達(dá)到地面水平 4 米以上的位置。
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