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Numerical controller

A numerical controller and interpolation technology, applied in digital control, program control, automatic control devices, etc., can solve problems such as inability to ensure interpolation

Active Publication Date: 2009-06-10
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in processing with Figure 14a and 14b During the surface process of the shape shown, the method described in the above patent document does not ensure that the interpolation

Method used

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no. 1 example

[0070] According to the first embodiment, the present invention is applied to a numerical controller for controlling a five-axis machine tool. like image 3 As shown, the five-axis machine has X, Y and Z axes which are linear axes, a B axis which rotates the head of the tool 1 around the Y axis, and a C axis which rotates around the Z axis. In this machine tool, a tool 1 linearly moves and rotates relative to a workpiece 6 mounted on a table 5 .

[0071] image 3 The case where the workpiece 6 is machined to form a conical surface surrounded by points PA, PB, PC and PD is shown. Line PA-PB is a circular arc. The arc plane 2 need not be based on a two-dimensional circle on the X-Y, Y-Z or Z-X plane. exist image 3 In the example shown, the arcs PA-PB are represented on surfaces inclined to the X-Y plane. However, based on the consideration of the tool diameter, the arc PA’-PB’ is programmed as the actual circular command of PA-PB.

[0072] In the case of the first embodi...

no. 2 example

[0096] The configuration and image 3 The first embodiment shown is the same. Also in the second embodiment, the surface of the cone surrounded by the points PA, PB, PC, and PD is formed by machining, and the line PA-PB is a circular arc. However, this arc is not a two-dimensional arc on the X-Y, Y-Z or Z-X plane. The arc plane 2 on which this arc is represented is inclined and not a two-dimensional arc, therefore the midpoint PM is programmed.

[0097] As in the case of the first embodiment, circular arcs PA'-PB' and midpoint PM' are programmed as actual circular commands based on tool diameter considerations.

[0098] For example, if you program a circular arc with start point PA' (100.0, 200.0, 50.0), end point PB' (174.166, 400.0, 150.0) and arc center (-200, 400, 150), you can program intermediate point PM' (157.071, 300.0, 100.0). In this case, the program can be given as follows:

[0099] G43.4H01: Tool end point control command;

[0100] G90 G01 X100.0 Y200.0 Z50...

no. 3 example

[0122] The third embodiment is an example in which a conical surface is formed by machining using a five-axis machine tool designed so that the table on which the workpiece is mounted is rotated instead of the tool head. Image 6 A sketch showing this machine tool. It has linear axes X, Y, and Z perpendicular to each other, a rotational A axis parallel to the X axis for rotation, and a rotational C axis parallel to the Z axis for rotation. The tool 1 moves linearly with respect to the table 5 and the workpiece 6, and rotates the table 5 by rotating the A and C axes.

[0123] When machining the workpiece 6 on the table 5 to form a surface surrounded by the points PA, PB, PC and PD, also in the machine tool constructed in this way, as in the first and second embodiments, taking into account the diameter, program PA'-PB' as an arc. Such processing can be performed in the same manner as in the first and second embodiments.

[0124] in this case, Image 6 The Xp-Yp-Zp on the ta...

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Abstract

A numerical controller configured to enable machining of a conical surface such that vectors at a start point, an end point, and an interpolation point of a circular arc and their extensions never cross one another. Normal direction vectors Vnors and Vnore, tangential direction vectors Vtans and Vtane, and tool posture vectors Vts and Vte at the starting and end points are obtained based on programmed positions PA' and PB' of the starting and end points, a circle center position, and rotational positions of two rotary axes. Based on these vectors, tangential direction angles as and ae and the normal direction angles bs and be with respect to tool postures at the starting and end points are obtained. Normal and tangential direction vectors Vnori and Vtani and angles ai and bi at the interpolation point are obtained by interpolating the normal and tangential direction vectors and angles at the starting and end points, whereby a tool posture vector Vti at the interpolation point is obtained. The rotational positions of the rotary axes and positions of linear axes are obtained based on the tool posture vector Vti at the interpolation point. Circular machining can be also performed for a three-dimensional programmed circular arc.

Description

technical field [0001] The present invention relates to a numerical controller for a machining device having three linear axes and at least two rotary axes for performing five-axis machining. Background technique [0002] A known arrangement for five-axis machining is described in US Patent No. 6,735,495, in which a cone is machined by programming a movement path for the end point of the tool and specifying the pose of the tool at the start and end points of the movement path body surface etc. [0003] Figure 11a and 11b It is a view explaining the surface processing of a cone described in US Patent No. 6,735,495. Figure 11a is a stereogram, and Figure 11b It is self Figure 11a Obtained floor plan. In this processing, the path at the end of the tool is specified by a circular arc, and the tool attitude vectors at the start point and end point of the path are programmed as the start point vector and the end point vector, respectively. The first angle PHI on the plane ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4103B23Q15/00
CPCG05B2219/34149G05B2219/34089G05B2219/49344G05B19/4103
Inventor 大槻俊明井出聪一郎
Owner FANUC LTD