重慶升降機(jī)采用滾壓加工，由于表面層留有表面殘余壓應(yīng)力，有助于表面微小裂紋的封閉，阻礙侵蝕作用的擴(kuò)展。從而提高表面抗腐蝕能力，并能延緩疲勞裂紋的產(chǎn)生或擴(kuò)大，因而提高缸筒疲勞強(qiáng)度。通過(guò)滾壓成型，滾壓表面形成一層冷作硬化層，減少了磨削副接觸表面的彈性和塑性變形，從而提高了升降平臺(tái)缸筒內(nèi)壁的耐磨性，同時(shí)避免了因磨削引起的燒傷。滾壓后，表面粗糙度值的減小，可提高配合性質(zhì)。
Ningbo lifting platform rolling process, the surface layer leaving the surface residual compressive stress, contribute to closing surface microcracks, impede erosion expansion. Thereby increasing the surface corrosion resistance, and can delay fatigue cracks or expanded, thus increasing the fatigue strength of the cylinder. By roll forming, rolling surface layer of cold hardening layer, reducing the elastic and plastic deformation of the contact surface grinding vice, thus improving the Ningbo lifting platform cylinder wall wear, while avoiding the grinding cause burns. After rolling, reducing the surface roughness can increase with nature.

滾壓后，孔表面粗糙度由幢滾前Ra3.2～6.3um減小為Ra0.4～0.8&um，孔的表面硬度提高約30%，缸筒內(nèi)表面疲勞強(qiáng)度提高25%。油缸使用壽命若只考慮缸筒影響，提高2～3倍，寧波升降平臺(tái)鏜削滾壓工藝較磨削工藝效率提高3倍左右。以上數(shù)據(jù)說(shuō)明，滾壓工藝是高效的，能大大提高缸筒的表面質(zhì)量。寧波升降平臺(tái)油缸經(jīng)過(guò)滾壓后，表面沒(méi)有鋒利的微小刃口，長(zhǎng)時(shí)間的運(yùn)動(dòng)摩擦也不會(huì)損傷密封圈或密封件，這點(diǎn)在液壓行業(yè)特別重要。
Ningbo lifting platform after rolling, the surface roughness of the hole before rolling Ra3.2 ~ 6.3um buildings reduced to Ra0.4 ~ 0.8 & surface hardness um, well increase by about 30%, the cylinder surface fatigue strength increased by 25%. Cylinder life if only to consider the impact of the cylinder barrel, increased by 2 to 3 times, Ningbo lifting platform rolling process is relatively boring grinding process efficiency increased by 3 times. The above data shows that the rolling process is efficient and can greatly improve the surface quality of the cylinder barrel. Ningbo lifting platform cylinder After rolling, the surface is not small sharp edge, prolonged friction movement will not damage seals or seal, which is particularly important in the hydraulic industry.