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一、引言液压机和压力机组合式机架、立柱需要预紧,板材和管材矫直机的机架、立柱也需要预紧,其他类似的结构也有预紧的问题。这类设备机架、立柱预紧的质量如何,将直接关系到设备的使用寿命和工作的稳定性,甚至将影响制品的精度。对板材、管材矫直机来说,这个问题显得更为重要,因为预紧的效果如何,直接影响成品板材、管材的矫直精度。所以,选择预紧装置和方法,是一个很重要的问题,必须予以足够的重视。二、采用加热方法预紧存在的问题一般立柱、机架预紧所采用的传统方法是
First, the introduction of hydraulic machine and press combination rack, column need to pre-tension, plate and tube straightening machine rack, column also need preload, other similar structures also preload problems. Such equipment rack, column preload how the quality will be directly related to the life of equipment and work stability, or even affect the accuracy of products. The plate, pipe straightening machine, the problem is even more important, because the preload effect, a direct impact on the finished plate, pipe straightening accuracy. Therefore, the choice of pre-tensioning devices and methods is a very important issue and must be given sufficient attention. Second, the use of heating pre-existing problems The general column, the traditional method of pre-tightening the rack is