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  • 鏡面輥的加工工藝
  • 本站編輯:極速快三購彩大廳發布日期:2019-07-14 11:08 瀏覽次數:
鏡面輥的加工工藝
 
一、組件焊接:
 
組焊內板、軸頭、襯套、堵板、內管等,內管做靜平衡50g之內,內管劃旋向線,焊扁鋼流道。
 
二、配車、裝、焊接:
 
配車內管、尺寸與外管過盈0.4mm, 兩幅板倒焊縫角15X30度,打磨內管,清渣、檢驗內管尺寸與外管內徑尺寸是否相適應,熱套到位,待冷卻收縮后,整體組焊。(注:45#鋼焊前加溫,焊后保溫)
 
三、退火、粗車、淬火:
 
退火熱處理,工藝調質,多重去應力,粗車留余量,做靜平衡,大于50g,需要計算借偏量,上車床借車。
 
淬火:表面硬度要求HRC58°-60°,輥面無龜裂紋。
 
四、精車、粗磨:
 
兩軸頭修頂針孔,兩軸頭對輥面跳動,<0.05,按圖要求加工長度到尺寸,外圓放余量,0.5-0.6。磨支撐圓做托架位,按圖要求磨輥面尺寸,Ra0.5兩軸頭對輥面跳動<0.02。
 
五、動平衡、電鍍、精磨:
 
做動平衡G40級,封堵透氣孔,做壓力實驗無泄漏,做水壓暢通實驗。電鍍硬鉻,單邊0.15鉻層均勻無針孔,脫落等缺陷。精磨兩軸頭,兩軸承擋對輥面跳動<0.01粗糙度0.8。其余軸頭各擋位磨到公差范圍。
 
六、磨砂、精磨鏡面:
 
用圓盤磨床磨砂輥面,檢驗輥面,無水波紋、螺旋紋、針眼、蒼蠅租等暇質。上拋光機床,拋輥面至粗糙度Ra0.01-0.005(光潔度達14級)做到超鏡面。鍍鉻拋光后硬度HRC62°。


Processing process of mirror roll
Component welding:
Group welding inner plate, axle head, Bushing, blocking plate, inner Guandeng, inner tube for static balance within 50 g, inner pipe spin line, welding flat steel flow.
Second, the distribution of vehicles, assembly, welding:
The inner pipe, size and outer pipe of the car are 0.4 mm, and the two plates are soldered at an angle of 15X30 degrees. The inner pipe is polished, the slag is cleared, and the inner tube size is matched with the inner diameter size of the outer pipe. The hot sleeve is in place. After cooling and contracting, the whole group is welded. (Note: 45 # Heating before welding, heating after welding)
Third, annealing, rough car, quenching:
Retreat heat treatment, process quality adjustment, multiple stress removal, rough car leaving margin, static balance, greater than 50G, need to calculate the amount of borrowed weight, get on the bed to borrow the car.
Quenching: Surface hardness requires HRC58 ° -60 °, and there is no turtle crack on the roll surface.
Fourth, fine cars, rough grinding:
Two axles to repair the top needle hole, two axles to beat on the roll surface, & lt; 0.05, processing length to size as required, outer circular margin, 0.5-0 .6. The grinding support circle is used as a bracket position. According to the figure, the size of the grinding roller surface is required, and the Ra 0.5 two-axis head beats on the roller surface & lt; 0.02.
Fifth, dynamic balance, electroplating, precision grinding:
Do balance G40, seal the air hole, do pressure experiment without leakage, do water pressure test. Electroplating hard Chromium, unilateral 0.15 Chromium layer uniform without needle holes, fall off and other defects. Grinding two heads, two bearings to block the roll surface beat & lt; 0.01 roughness 0.8. The rest of the shaft heads are grinding to the tolerance range.
Six, grinding, grinding mirror:
Use the disc grinder to grind the roll surface and test the roll surface. There are no water ripples, spiral lines, needle eyes, fly rent, etc.. On the polishing machine tool, the roller surface is thrown to the roughness Ra0.01 -0.005(finish up to 14) to achieve a hypermirror. The hardness of chrome-plated polishing is HRP62 °.