重型机械
重型機械
중형궤계
HEAVY MACHINERY
2014年
4期
16-19
,共4页
陈永甲%张君%侯永超%张万福%周少凡%冯东晓
陳永甲%張君%侯永超%張萬福%週少凡%馮東曉
진영갑%장군%후영초%장만복%주소범%풍동효
挤压机%超压预紧%拉杆%压套
擠壓機%超壓預緊%拉桿%壓套
제압궤%초압예긴%랍간%압투
extrusion press%superpressure pretightening%pull-rod%pressure column
介绍了挤压机机架超压预紧的原理和实际操作方法，通过对125 MN挤压机机架预紧前后拉杆和压套的应力和变形量的测试分析，得出预紧后拉杆应力变化幅度是不预紧时的36％，预紧后拉杆伸长量是不预紧时的29.5％。因此，超压预紧延长了拉杆的疲劳寿命，提高了机架整体刚度，保证了制品精度。
介紹瞭擠壓機機架超壓預緊的原理和實際操作方法，通過對125 MN擠壓機機架預緊前後拉桿和壓套的應力和變形量的測試分析，得齣預緊後拉桿應力變化幅度是不預緊時的36％，預緊後拉桿伸長量是不預緊時的29.5％。因此，超壓預緊延長瞭拉桿的疲勞壽命，提高瞭機架整體剛度，保證瞭製品精度。
개소료제압궤궤가초압예긴적원리화실제조작방법，통과대125 MN제압궤궤가예긴전후랍간화압투적응력화변형량적측시분석，득출예긴후랍간응력변화폭도시불예긴시적36％，예긴후랍간신장량시불예긴시적29.5％。인차，초압예긴연장료랍간적피로수명，제고료궤가정체강도，보증료제품정도。
The principle and operation method on pretightening frame of large-scale extrusion press were intro-duced.Through analysis of stress deformation of pull-rod and pressure colum,before and after pretightening frame of 125MN extrusion press,it gained that pretightening pull-rod is 36% of stress change range of un-pretightening pull-rod,which is 29.5% of extension unpretightening pull-rod.Pretightening is able to prolong fatigue life of pull-rod,improve rigidity of extrusion press,and ensure product accuracy.
