Cutting movements
(1) Main motion The main motion is the main motion provided by the machine or manpower, which makes the relative motion between the tool and the workpiece, so that the rake face of the tool is close to the workpiece and the cutting layer is removed. In equipment such as machining centers, the main motion refers to the rotational motion of the spindle.
(2) Feed motion The feed motion is provided by the machine tool or manpower to produce additional relative motion between the tool and the workpiece, plus the main motion, the cutting layer can be continuously removed, and the machined surface with the required geometric characteristics is obtained. In equipment such as machining centers, feed motion refers to the movement (W) of each component driven by a servo motor on each axis
(3) Synthetic cutting motionWhen the main motion and the feed motion are carried out at the same time, the motion synthesized by the main motion and the feed motion is called the synthetic motion. The instantaneous resultant direction of motion of the selected point on the cutting edge of the tool relative to the workpiece is called the resultant cutting direction of motion, and its velocity is called the resultant cutting speed. Synthetic cutting speed.
Equal to the main motion velocity. , and feed movement velocity" vector sum, ,=®+ㄢ.
(4) auxiliary motion In addition to the main motion and feed movement, the machine tool also needs to complete a series of other movements in the processing process, that is, auxiliary motion. There are many types of auxiliary movements, including: the movement of the tool approaching the workpiece, cutting people, cutting out the workpiece, and quickly returning to the origin: the tool setting motion to keep the tool and the workpiece in a relatively correct position: the periodic transposition of the multi-station worktable and the multi-station tool holder and the B-axis rotation indexing motion of the horizontal machining center when machining multiple identical local surfaces one by one; Machining center, tool magazine, replacement of tools, etc. In addition, the starting, stopping, speed changing, and reversing of machine tools, as well as the manipulation and control movements of parts and workpieces, such as clamping and loosening, are also auxiliary movements.
