(2) 2-2辊系如前所述,2-2辊系多为六辊结构,辊子全部驱动,主要用于管材矫直。因此,其受力分析也按矫直管材来进行,如图3-12所示。中间两个辊子可以上下调节,而两端的两对辊子只可调上辊。每对辊子之间都互相压紧,对管材有弹性压扁作用,在中间两辊处可形成较 (2) 2-2 roller system As mentioned earlier, 2-2 roller system is mostly six-roller structure, the rollers are all driven, mainly used for pipe straightening. Therefore, its force analysis is also straightening pipe, as shown in Figure 3-12. The middle two rollers can be adjusted up and down, while the two ends of the roller can only be adjusted on the roll. Each pair of rollers are pressed against each other, the pipe has an elastic crushing effect, can be formed in the middle of the two rollers more