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CNC processing smooth transition method and device

A smooth transition and transition arc technology, applied in the direction of instruments, digital control, control/regulation systems, etc., can solve problems such as expensive, not open to the outside world, inconvenient to use, etc.

Inactive Publication Date: 2016-12-14
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Data processing generally includes tool compensation and speed calculation, etc., but at the machining inflection point (such as the connection point between the straight line segment and the straight line segment), vibration is prone to occur due to the sudden change in the machining direction, which affects the machining accuracy and even damages the machine tool.
[0003] At present, due to various factors, the economical CNC machine tool generally adopts the method of increasing chamfering to improve the smoothness of processing when processing precision requirements, but this method is not only inefficient, but also difficult to improve processing accuracy.
However, the smooth processing of medium and high-end CNC machine tools is too complicated, inconvenient to use, and expensive, so it is not open to the public.

Method used

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  • CNC processing smooth transition method and device
  • CNC processing smooth transition method and device
  • CNC processing smooth transition method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Please combine figure 2 , when processing the straight line segment AB to the straight line segment BC, the smooth transition method includes the following steps.

[0063] Step 1, acquisition of smooth transition parameters. The starting point A coordinate of the straight line segment AB, the turning point B coordinate, and the end point C coordinate of the straight line segment BC are used as the smooth transition parameters for the straight line segment AB to straight line segment BC processing;

[0064] Step 2, obtaining the radius of the target transition arc segment.

[0065] First, according to the vector of the straight line segment AB and the vector of the straight line segment BC, the vector angle θ is obtained, and at the same time, the rotation direction of the transitional arc segment DE is obtained according to the cross product of the vector of the straight line segment AB and the vector of the straight line segment BC; then according to the preset Set ...

Embodiment 2

[0085] Please combine image 3 , when performing straight line segment AB to arc segment BC processing, or arc segment CB to straight line segment BA processing, the smooth transition method includes the following steps:

[0086] Step 1. Acquisition of smooth transition parameters: the coordinates of the starting point A of the straight line segment AB, the coordinates of the turning point B, the coordinates of the end point C of the arc segment BC, and the radius r 1 and the center coordinate O 1, the rotation direction of the arc segment BC is used as the smooth transition parameter for the machining of the straight line segment AB to the arc segment BC, or the rotation direction of the arc segment CB is used as the smooth transition parameter for the machining of the arc segment CB to the straight line segment BA;

[0087] Step 2. Acquisition of the radius of the target transition arc segment: first, according to the preset arc radius r, combined with the tangent equation ...

Embodiment 3

[0096] Please combine Figure 4 , when performing arc segment AB to arc segment BC processing, the smooth transition method includes the following steps:

[0097] Step 1. Acquisition of smooth transition parameters: set the coordinates of the starting point A of the arc segment AB, the radius r 1 and center O 1 Coordinates, turning point B coordinates, end point C coordinates of arc segment BC, radius r 2 and center O 2 The coordinates, the rotation direction of the arc segment AB and the rotation direction of the arc segment BC are used as the smooth transition parameters for the processing of the arc segment AB to the arc segment BC;

[0098] Step 2: First, according to the preset radius r of the arc, combined with the tangent equations of the arc segment AB and the arc segment BC, the point D can be found on the arc segment AB and the point E can be found on the arc segment BC respectively. The tangent line intersects at point H, such as figure 2 As shown, the arc tra...

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Abstract

The invention discloses a CNC processing smooth transition method and device. The method is used for outputting pulses capable of controlling a servo controller, and the pulses drive the servo controller to control a servo motor to achieve track processing of the servo motor. The method includes the steps that smooth transition parameters are obtained; the radius of a target transition arc segment is obtained, wherein a transition arc segment is obtained according to the smooth transition parameters and a preset arc radius, and the transition arc segment is subjected to error inspection to obtain the target transition arc segment and the corresponding radius; interpolation instruction parameters are obtained, wherein track planning is carried out again according to two line segments and the target transition arc segment, and the interpolation instruction parameters are obtained; the pulses are obtained, wherein interpolation calculation is carried out according to the interpolation instruction parameters, and the pulses are obtained. Smoothness of CNC processed parts is achieved, certain processing precision requirements are met, and the method and device are easy to achieve, short in development period and stable in function.

Description

technical field [0001] The invention relates to a smooth transition method and a smooth transition device thereof, in particular to a CNC machining smooth transition method and a smooth transition device thereof. Background technique [0002] The process of NC machining parts generally includes the steps of part drawing process processing, mathematical processing, NC programming and program simulation, program input, decoding, data processing, interpolation, and servo control and processing. Data processing generally includes tool compensation and speed calculation, etc., but at the machining inflection point (such as the connection point between straight line segments and straight line segments), vibration is prone to occur due to sudden changes in the machining direction, which affects machining accuracy and even damages the machine tool. [0003] At present, due to various factors, the economical CNC machine tool generally adopts the method of increasing chamfering to imp...

Claims

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Application Information

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IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349
Inventor 翟华周丽华张一凡洪占勇吴玉程严建文
Owner HEFEI UNIV OF TECH
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