M131W万能磨床需磨工件内孔时,操作者必须将内圆磨头翻上翻下,很费力,并且浪费了不少辅助时间,所以,我们对此进行了改装。结构见图1所示。改装方法简述如下:一、油缸行程的计算油缸行程的选择可根据运动原理简图(图2)进行计算。我们从图中知道,磨头由上死点转动至工作位置的转角为134°,其余O_1O_2=560mm, O_1A=135mm,磨头在上死点O_2A=430mm。根据余弦定理,可求得油缸回转支点与磨头在工作位置之间夹角为:134° M131W universal grinder grinding workpiece bore, the operator must turn the grinding wheel turned down, very laborious, and wasting a lot of auxiliary time, so we have been modified. Structure shown in Figure 1. Refit methods are summarized as follows: First, the calculation of cylinder stroke Cylinder stroke selection can be based on the principle of motion diagram (Figure 2) to calculate. We know from the figure that the rotation angle of the grinding head from the top dead center to the working position is 134 °, and the remaining O_1O_2 = 560mm and O_1A = 135mm. The grinding head has an upper limit of O_2A = 430mm. According to the cosine theorem, the angle between the rotary fulcrum of the cylinder and the grinding head in the working position can be obtained as follows: 134 °