隨著單張紙膠印機(jī)歷史的發(fā)展，主滾筒軸承也經(jīng)歷了很多變革。從早先的黃銅滑動軸承到滾子軸承，從滾針軸承到滾柱軸承，從單一軸承到組合軸承，從兩環(huán)軸承到三環(huán)偏心軸承。滾筒軸承的精度越來越高，安裝越來越方便，維護(hù)越來越簡單。

With the development of single sheet offset printing press history, the main drum bearings have also undergone many changes. From brass sliding bearings to roller bearings, from needle roller bearings to roller bearings, from single bearings to combination bearings, from two ring bearings to three ring eccentric bearings. The precision of roller bearings is increasing, installation is becoming more convenient, and maintenance is becoming simpler.

一．滾針軸承

1、 Needle roller bearings

滾針軸承的剛性因其滾子直徑小而要比圓錐滾子軸承好很多，而且軸承公司開發(fā)的雙列錯位的滾針軸承使其剛性可以與銅套滑動軸承相媲美。與普通的滾針軸承相比，應(yīng)用于印機(jī)滾筒支撐的滾針軸承的滾針分組要比普通的高。普通的滾針軸承的滾針分組以2μm為單元，而印機(jī)使用的滾針分組以1μm為單元。這樣，通過選擇合適的滾針分組，就可以使軸承的工作游隙小于1μm，這樣的運(yùn)轉(zhuǎn)精度正是高質(zhì)量的印機(jī)所需要的。并且印機(jī)使用的滾針分組可以比普通滾針軸承的分組組別更多，這樣對于墻板的加工要求自然就可以降低。

The rigidity of needle roller bearings is much better than tapered roller bearings due to their smaller roller diameter, and the double row misaligned needle roller bearings developed by the bearing company make their rigidity comparable to copper sleeve sliding bearings. Compared with ordinary needle roller bearings, the needle roller grouping of needle roller bearings used for printing machine drum support is higher than that of ordinary ones. The needle grouping of ordinary needle roller bearings is based on 2 μ m units, while the needle grouping used in printing machines is based on 1 μ m. In this way, by selecting the appropriate needle roller grouping, the working clearance of the bearing can be reduced to less than 1 μ m, which is exactly what high-quality printing machines require. And the needle roller grouping used by the printing machine can be more than that of ordinary needle roller bearings, which naturally reduces the processing requirements for wall panels.

二．滾柱軸承

2、 Roller bearings

滾針軸承的使用，仍使得印機(jī)制造商煩于需要加工精度很高的外套，和需要經(jīng)驗豐富的安裝工尋找合適的滾針組別。為了解決這個問題，軸承產(chǎn)商開發(fā)出了外圈集成法蘭的滾柱軸承支撐。滾柱軸承可通過預(yù)緊達(dá)到很好的精度和剛性。并且還可使用帶錐度的內(nèi)圈，以任意調(diào)整軸承工作游隙。此種解決方案完全可以實現(xiàn)印機(jī)滾筒軸承零游隙的需求。而且?guī)Хㄌm的外圈為印機(jī)產(chǎn)商解決了安裝和潤滑的問題。曼羅蘭、海德堡、日本利尤比以及國內(nèi)北人的機(jī)型廣泛使用此軸承。其滾柱軸承支撐方案已成為印機(jī)中滾筒支撐的主流方案。

The use of needle roller bearings still troubles printing machine manufacturers with the need for high-precision jackets and the need for experienced installers to find suitable needle roller groups. To solve this problem, bearing manufacturers have developed roller bearing supports with outer ring integrated flanges. Roller bearings can achieve good precision and rigidity through pre tensioning. And a tapered inner ring can also be used to adjust the working clearance of the bearing arbitrarily. This solution can fully meet the requirement of zero clearance for printing machine drum bearings. And the outer ring with flange solves the installation and lubrication problems for the printing machine manufacturer. This bearing is widely used in models from Manroland, Heidelberg, Japan's Liyoubi, and domestic Northerners. The roller bearing support scheme has become the mainstream solution for roller support in printing machines.

三．集成單元

3、 Integrated unit

和汽車工業(yè)以及其他工業(yè)一樣，印機(jī)制造商也需要像軸承一樣的精密產(chǎn)品供應(yīng)商提供更為簡單的模塊化組件以減少工廠組裝的誤差和時間，減少返工率，從而提升效率、降低成本。為了滿足此需求，軸承產(chǎn)商為主滾筒支撐提供了精度更高，安裝、維護(hù)更為簡易的滾筒支撐單元。如軸承公司開發(fā)的三環(huán)偏心軸承單元。此軸承單元集成軸承和偏心套，不僅具有支撐滾筒作用，并可實現(xiàn)滾筒離合壓和套準(zhǔn)的功能。其優(yōu)越性已經(jīng)廣泛地被印機(jī)產(chǎn)商接受。

Like the automotive industry and other industries, printing machine manufacturers also need precision product suppliers like bearings to provide simpler modular components to reduce factory assembly errors and time, reduce rework rates, thereby improving efficiency and reducing costs. In order to meet this demand, bearing manufacturers have provided roller support units with higher precision and easier installation and maintenance for the main drum support. The three ring eccentric bearing unit developed by the bearing company. This bearing unit integrates bearings and eccentric sleeves, which not only support the drum, but also achieve the functions of drum clutch pressure and sleeve alignment. Its superiority has been widely accepted by printing machine manufacturers.

高寶、曼羅蘭的機(jī)型以及海德堡的新機(jī)型，都已經(jīng)在印版滾筒或橡皮滾筒上使用此軸承單元。而在老機(jī)型的改型工作中，此種三環(huán)軸承支撐已經(jīng)成為。目前并無在性能上、安裝使用、維護(hù)上有比此軸承單元更好的方案。而其迷宮式密封圈和圓柱滾子的使用，使其即可進(jìn)行油潤滑，也可進(jìn)行脂潤滑，而且終生免維護(hù)。優(yōu)良的潤滑也使此軸承的壽命在各種方案中長。它使得印機(jī)制造商對精度的要求從其自身的加工、安裝生產(chǎn)線挪到了生產(chǎn)軸承等精密產(chǎn)品的軸承生產(chǎn)線。這也符合現(xiàn)代工業(yè)的集約化。以上為印機(jī)主滾筒支撐的各類解決方案。印機(jī)因其自身精度的要求，對旋轉(zhuǎn)和直線運(yùn)動件的支撐都有很高的要求。以上的解決方案完全可以解決國內(nèi)印機(jī)產(chǎn)商發(fā)展自身更具特色產(chǎn)品的需要。

Gaobao, Manroland's models, and Heidelberg's new models have already used this bearing unit on plate cylinders or rubber cylinders. In the retrofitting work of old models, this type of three ring bearing support has become the preferred choice. There is currently no better solution than this bearing unit in terms of performance, installation, use, and maintenance. The use of its labyrinth seal ring and cylindrical roller allows it to be lubricated with oil or grease, and it is maintenance free for life. Excellent lubrication also ensures the longest lifespan of this bearing among various schemes. It has shifted the precision requirements of printing machine manufacturers from their own processing and installation production lines to the bearing production lines that produce precision products such as bearings. This is also in line with the intensification of modern industry. The above are various solutions for supporting the main drum of the printing machine. Printing machines have high requirements for the support of rotating and linear moving parts due to their own precision requirements. The above solutions can fully meet the needs of domestic printing machine manufacturers to develop more distinctive products.

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