Tool Setting Steps of Omori CNC Lathe

Related concepts and methods of tool alignment in CNC lathe

(1) Tool position: it represents the reference point of the tool and the gaze point when aiming at the tool, usually a point on the tool.

(2) Tool starting point: The tool starting point is the starting point of the movement of the tool relative to the workpiece, that is, the starting position of the tool point at the beginning of the part processing program, which is often procedural.

The finish line of running.

(3) Tool setting point and tool setting: Tool setting point is a point used to determine the relative position relationship between tool and workpiece, and it is a point to determine the relationship between workpiece coordinate system and machine tool coordinate system.

Tool alignment is to put the tool point of the tool on the tool alignment point to establish the workpiece coordinate system.

(4) Tool alignment benchmark (point): the benchmark used to determine the position of the tool alignment point during tool alignment. This datum can be a point, a line or a surface, which can be set on the workpiece or fixture.

Or on a machine tool.

(5) Tool alignment reference point: it is a reference point used to indicate the position of the tool rest, tool rest or cutter head in the coordinate system of the machine tool, also called tool rest center or tool reference point.

Determination of starting point position and tool alignment steps by trial cutting method

(1) In MDI or manual mode, cut the end face of the workpiece with a reference knife;

(2) inching the X axis to make the cutter try to cut the end face, and the cutter exits along the X axis direction to stop the spindle.

Record z-axis coordinate values and input them into the system.

(3) Measure the outer diameter of the workpiece with a reference knife.

(4) inching the Z axis to make the cutter cut the excircle surface of the workpiece, and the cutter exits along the Z direction and stops the spindle. Measure the diameter of the workpiece with vernier caliper and record it.

X coordinate values and enter them into the system.

(5) For the second tool, let the tool rest retreat from the workpiece, select the tool number, and repeat steps (1)-(4).

Z-axis tool setting device of NC milling machine (machining center)

The Z-axis tool alignment instrument is mainly used to determine the Z-axis coordinate of the origin of the workpiece coordinate system in the machine tool coordinate system, or to determine the height of the tool in the machine tool coordinate system. Z axis has photoelectric () and pointer tool setting instrument. Through photoelectric indication or pointer, it can be judged whether the tool is in contact with the tool aligner. Generally, the accuracy of tool alignment can reach100.0 0.0025 (mm), and the repeatability of calibrating tool height is generally 0.00 1~0.002 (mm). The tool rest has a magnetic watch seat, which can be firmly fixed on the workpiece or fixture. The height of Z-axis cutter is generally 50 mm or 100 mm..

The use of Z-axis cutter is as follows:

(1) Install the tool on the spindle, and attach the Z-axis tool holder to the clamped workpiece or fixture plane.

(2) Move the workbench and spindle quickly, so that the end face of the tool is close to the upper surface of the Z-axis tool alignment instrument.

(3) Use stepping or electronic handwheel for fine adjustment, so that the end face of the cutter slowly contacts the upper surface of the Z-axis tool holder until the Z-axis tool holder glows or the pointer indicates zero.

(4) Write down the Z value data in the mechanical coordinate system.

(5) In the case of the current tool, the Z coordinate value of the workpiece or fixture plane in the machine tool coordinate system is the data value minus the height from the Z axis to the tool.

(6) If the Z coordinate zero of the workpiece coordinate system is set on the tool setting plane of the workpiece or fixture, this value is the position of the Z coordinate zero of the workpiece coordinate system in the machine tool coordinate system, that is, the Z coordinate zero offset value.

3. Edge detector

The edge finder is mainly used to determine the zero offset value of the origin of the workpiece coordinate system in the machine coordinate system, and can also measure the simple size of the workpiece. It has eccentric (), rotary () and photoelectric () types.

Eccentric and rotary edge finders are mechanical structures. The distance from the center of the machine tool spindle to the measured surface is the radius of the measuring cylinder.

The probe of photoelectric edge finder is generally a steel ball of 10mm, which is tensioned on the measuring rod of photoelectric edge finder with a spring. When it touches the workpiece, it can make way, connect the circuit and send out an optical signal. The coordinate position of the measured surface can be obtained through the indication of the photoelectric edge finder and the coordinate position of the machine tool. Using the symmetry of the probe, some simple dimensions can also be measured.