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(2)不锒缸套缸孔的加工缸孔的加工,目前国内都采用单机。有的将直列的缸体倾斜45°安装,采用倾斜式六轴金刚镗床,如一汽和二汽的缸孔镗床;有的采用六轴立式精镗床,如南汽缸孔镗床;产量不大的,大多采用单轴金刚镗床。这些设备加工缸孔的精度不稳定,要依靠工人的技术水平。倾斜45°的金刚镗床是苏联早期采用的,其它国家大多采用立式多轴精镗床。五十年代末美国Cross公司生产的用于直列四缸气缸体加工线中加工缸孔的机床,采用了三导轨结构,其原理如图26所示。该机床的特点是主轴中心联线位于两个侧导轨的对称中心线上,这样就减小了颠覆力矩。中间导轨用于纵向引导,大大增加了
(2) Cylinder sleeve cylinder bore processing cylinder hole processing, the current domestic use of single machine. Some of the inline cylinder tilt 45 ° installation, the use of inclined six-axis boring machine, such as FAW and two steam cylinder bore boring machine; some with six-axis vertical boring machine, such as the South cylinder bore boring machine; output is not large , Mostly single-axis diamond boring machine. The accuracy of machining the bores of these machines is not stable, depending on the skill level of the workers. The diamond boring machine tilted 45 ° was adopted by the Soviet Union in the early days. Most other countries used vertical multi-axis fine boring machines. In the late 1950s, the cross-machine tool used to manufacture the cylinder bore in the in-line four-cylinder block machining line produced by Cross Company in the United States adopted a three-rail structure. The principle is shown in FIG. 26. The feature of this machine is that the centerline of the spindle is located at the center of symmetry of the two side guides, thus reducing the subversion moment. The middle rail for longitudinal guidance, greatly increased