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铣削较小工件常采用多件装夹铣具,如图1所示就是利用夹具弹性变形来同时夹紧4个如图2所示零件的铣具。铣具被安装在卧式铣床上,用两把三面刃铣刀一次将零件加工到尺寸13±0.09,夹具的结构如图1所示。该夹具装夹方便,夹紧力分布合理(两处同时压紧),夹具的设计参数及作用于扳手的力都恰到好处,因此该夹具使用起来省力,零件也被夹得牢固。设计该夹具主要技术问题是要对夹紧力进行计算。本文将对夹紧力作用于扳手的力的计算作详细介绍。 一、夹具的作用原理 首先将零件分别装入夹具中,操作者用扳手作用于右牙螺母齿轮上。右牙螺母齿轮6转动并沿右牙螺
Milling small workpieces often use more pieces of clamping tools, as shown in Figure 1 is the use of elastic deformation of the clamp to simultaneously clamp four parts as shown in Figure 2 milling. The milling tool is mounted on a horizontal milling machine and the part is machined to a size of 13 ± 0.09 with two three-sided milling cutters at a time. The structure of the fixture is shown in FIG. 1. The clamping fixture is convenient, the distribution of clamping force is reasonable (two simultaneous compression), the fixture design parameters and the role of the wrench on the force are just right, so the fixture used to save effort, the parts are also clamped firmly. The main technical issue of designing the fixture is to calculate the clamping force. In this paper, the calculation of the force acting on the wrench by the clamping force is described in detail. First, the role of the principle of the fixture First, the parts were loaded into the fixture, the operator with a wrench on the right tooth nut gear. Right tooth nut gear 6 turns and goes right