Tool setting point is the reference point used to determine the position of workpiece coordinate system in the machine coordinate system after the workpiece is aligned and clamped on the machine tool.
The tool setting point can be selected on the workpiece or clamping positioning element, but there must be an accurate, reasonable and simple position corresponding relationship between the tool setting point and the workpiece coordinate point, so as to facilitate the calculation of the position of the workpiece coordinate point on the machine tool / (the machine coordinate of the workpiece coordinate point). The tool setting point should coincide with the workpiece coordinate point.
Tool change point: the machining center has a tool magazine and an automatic tool change device, which can automatically change tool according to the needs of the program. The tool change point should be in the position where there is no collision and interference among workpiece, fixture, tool and machine tool during tool change. The tool change point of machining center is usually fixed.
Tool setting method:
Tool setting in horizontal direction / (x, y coordinates)
(1) Lever dial indicator tool setting: the tool setting point is the center of the cylindrical hole;
(2) Tool setting with edge finder: round hole or reference edge
(3) The tool is set by touching or trial cutting.
Tool setting in Z direction / (Z coordinate /):
(1) On machine tool setting: use Z direction setter to set tool.
(2) Tool presetting outside the machine and tool setting on the machine.
(3) External tool setting instrument: measure the diameter, length, edge shape and angle of the cutter.
(4) Tool setting in multi position machining of horizontal machining center
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