在铣床上铣削R、半圆或圆时,按照已划好的线去找,不仅浪费时间,而且由于错位关系,可能铣出来的R和圆心不太一致。我们在生产中采用了一种模拟找圆心的方法,介绍如下:在立式铣床上装好回转工作台,找一块较软的材料,如铝板、胶木板或者其它的材料作试件,把试件压在回转台上,如图1,再在立铣头上装上顶尖,把顶尖移动到接近回转工作台的中心,开动机床,使顶尖在试件上划出 Milling R, semicircle or circle on a milling machine, according to the designated line to find, not only a waste of time, but also because of the dislocation relationship, may be out of R and the center of the circle is not consistent. We used a production simulation method to find the center of the circle, described as follows: In the vertical milling machine mounted rotary table, find a piece of soft material, such as aluminum, bakelite or other materials for the specimen, the specimen Pressure in the rotary table, as shown in Figure 1, and then mounted on the top milling head, the top moved close to the rotary table center, start the machine, so that the top of the test piece