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本文介绍用能量法和卡氏定理在机械加工中分析变形量的具体应用方法,并将此法用于弹性夹头的设计计算,用实例说明了这一方法的实用性和普遍性。一、变形的分析与解决变形的基本理论零件在加工过程中,在各种力的作用下,整个工艺系统要产生相应的变形,从而破坏了成形运动的原有精度,并造成零件在尺寸、形状和位置等方面的加工误差。其中夹紧力的影响尤为突出。如图1所示,在车床上用三爪卡盘定位夹紧加丁轴套时,由于夹紧力而产生弹性变形,工件加工后在车床上测量是合格的,但一取下后因弹性恢复而超差。
In this paper, we introduce the application of the method of energy and Karnofsky to analyze the deformation in machining, and apply this method to the design and calculation of the elastic collet. The practicality and universality of this method are illustrated by examples. First, the deformation analysis and solve the basic theory of deformation In the process of processing, under the action of various forces, the entire process system to produce the corresponding deformation, thus undermining the original accuracy of forming motion and cause parts in size, Shape and location of the processing error. The impact of clamping force is particularly prominent. As shown in FIG. 1, when a three-jaw chuck is used for positioning and clamping a butt bush on a lathe, an elastic deformation is generated due to a clamping force. After the workpiece is machined and measured on a lathe, it is qualified after being removed, Recovery and ultra poor.