机械5

20-40mm板材矫直机设计 摘要 在轧制生产过程中，由于塑性变形、冷却不均或运输等一系列原因使轧件产生不同程度的挠曲、瓢曲、波浪、镰刀弯和歪扭，或内部残余应力，从轧机出来的轧件往往具有不平直性和形状尺寸精度误差较大的情形。因此矫直技术是提高板带钢产品表面质量和平坦度的重要环节。 本文介绍了平行板矫直机的结构特点和功能。并且对矫直机的发展趋势和实际生产中存在的问题做了阐述。本次设计的矫直机是用来矫正钢板在轧制过程中产生的各种弯曲和瓢曲，通过矫正可消除钢板弯曲应力，并提高钢板的平直度，达到用户的要求。设计中对矫直原理做了详细具体的阐述，对其主要零部件做了校核，对矫直机的力能参数做了计算，同时包括机架、上矫直辊系、下矫直辊系、压下与平衡系统等主要部件的设计。为了避免矫正时的冲击，压下装置中装有机械式平衡机构，平衡弹簧装在托盘上通过拉杆来平衡上活动横梁的全部重力，并能消除螺母与螺杆直角的窜动间隙。托盘将全部重力通过推力轴承压到平衡螺母上，而平衡螺母又通过内齿圈与蜗轮螺母联结成同步转动又互不相压的关系。 关键词：板材矫直机，平行辊式，压下与平衡装置 20-40mm straighte
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ng marchi
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nrolli
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n process, a
number of reaso
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nt degrees ofbe
ndi
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nalresidual stress. Rolledfromtherolli
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ness of the productio
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nd fu
nctio
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ni
ng marchi
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nt tre
ndof thestraighte
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ng machi
nea
nd the actualproductio
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n detail. The desig
n of thestraighte
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ngmachi
ne isused to correctplate i
n therolli
ng processfor a variety ofbe
ndi
ng a
ndbuckli
ng. By correcti
ng plateca
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natebe
ndi
ng stress,a
nd improvethe flat
ness ofsteel plate tothe user'srequireme
nts. The desig
n i
ncludes a detailed co
ncrete expositio
nof the pri
ncipleofstraighte
ni
ng,check ofits mai
ncompo
ne
nts a
nd the calculatio
n of parametersof thestraighte
ni
ng machi
ne. It alsoi
ncludesthe desig
n ofthe rack,the upperstraighte
ni
ngrollsa
nd lowerstraighte
ni
ngrolls, the pressure a
nd bala
ncesystem,a
nd other major compo
ne
nts. I
n order to avoidthe impact, the deviceequipped with amecha
nicalbala
nce body a
nd bala
ncespri
ngmou
nted o
n the traythrough therodto bala
nceall thegravityof the uppermovi
ng beam a
nd also toremovethe
nuta
ndscrewat right a
ngles totraversethe gap. The tray putsallthe gravitypressure o
n thebala
ncethrough a
nd the thrustbeari
ng
nut while the bala
nce
nut ri
ng gear li
nked the bala
nce
nut a
nd the worm
nuti
nto asy
nchro
nous rotatio
na
nd
no pressurebetwee
neach other. Key words: Plate straighte
ni
ng machi
ne, Roll, Pressure a
nd the bala
nce device 目录 第1章绪论1 1.1设计背景1 1.2国内外研究现状、发展动态1 1.3矫直机的类型3 1.3.1应用弹塑性弯曲变形进行矫直3 1.3.2应用弹塑性拉伸变形进行矫直5 1.3.3利用弹塑性扭转变形进行矫直6 1.3.4应用轧压原理进行矫直6 1.3.5应用组合变形进行矫直6 1.4平行辊矫直机简介7 1.4.1平行辊矫直机的矫正过程7 1.4.2平行辊矫直机的优缺点8 1.5设备概况8 第2章平行辊矫直机的参数计算11 2.1技术参数11 2.2结构参数计算11 2.3力能参数计算12 2.3.1矫直力与矫直力矩的计算12 2.3.2矫直功率的计算13 第3章主要部件设计17 3.1主传动系统设计17 3.2下矫直辊系17 3.3上矫直辊系18 3.4上下支承辊及调整装置18 3.5压下平衡系统19 3.6机架21 3.7导卫装置21 3.8润滑22 3.9电控装置22 3.10结论23 第4章主要部件的校核31 4.1矫直辊的校核计算31 4.1.1矫直机矫直扭矩的计算31 4.1.2第三辊弯曲力矩的计算32 4.1.3支反力的确定35 4.2矫直辊强度的计算36 4.3轴承寿命的校核37 参考文献39 结束语41