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Corner speed computation method for single-axis acceleration constraint in tool center point control

A single-axis acceleration and calculation method technology, applied in the field of numerical control, can solve the problems of large acceleration and vibration of machine tool axes, and achieve the effect of avoiding vibration

Inactive Publication Date: 2019-07-09
SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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Problems solved by technology

[0004] If the speed of the corner formed by the tool center point trajectory (that is, the programmed trajectory of the workpiece coordinate system specified by the processing program) is large at a uniform speed, and the speed difference before and after the new corner of the machine tool coordinate system after conversion is also large, it will cause control. The acceleration of the single-step transition of the machine tool axis of the machine tool movement is very large, even reaching more than 10 times the maximum acceleration of the single axis configured by the CNC device, resulting in vibration

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  • Corner speed computation method for single-axis acceleration constraint in tool center point control
  • Corner speed computation method for single-axis acceleration constraint in tool center point control
  • Corner speed computation method for single-axis acceleration constraint in tool center point control

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Embodiment Construction

[0047] The method of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0048] Such as figure 1 Shown, the inventive method comprises the following steps:

[0049] 1) Calculation of the corner angle on the tool center point track: used to calculate the angle formed by the path before and after the corner on the tool center point track, and judge whether it is necessary to calculate the limit speed of the corner. For the corner that needs to calculate the limit speed of the corner, set the tool center point track (that is, the programmed track of the workpiece coordinate system specified by the processing program) to pass the corner at a uniform speed, that is, set the same speed before and after the corner on the tool center point track, only the direction change. This speed is the limit speed that needs to be calculated and is constrained by the single-axis maximum acceleration configured by the CNC device, on th...

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Abstract

The invention relates to a corner speed computation method for single-axis acceleration constraint in tool center point control. The method comprises the following steps: (1) computing an angle size formed by front and back paths of a corner of the tool center point trajectory, and judging whether needs to compute the corner limitation speed; for the corner needing to compute the corner limitationspeed, setting to pass through the corner in constant speed on the tool center point trajectory, and executing step (2); (2) computing the proportion of the lengths of front and back line segments ofthe corner of a workpiece coordinate system before tool center point control conversion and the lengths of the front and back line segments of the corner of the converted machine tool coordinate system; and (3) computing the corner limitation speed of the tool center point trajectory with the single-axis maximum acceleration constraint configured by the numerically controlled device. The speed ofpassing through the tool center trajectory corner in the workpiece program processing procedure of the function for starting the tool center point control (RTCP) is effectively controlled, and the vibration produced in the processing procedure is avoided.

Description

technical field [0001] The invention relates to a method for calculating a rotational angular velocity constrained by uniaxial acceleration in tool center point control, and belongs to the technical field of numerical control. Background technique [0002] In NC machining with the tool center point control (RTCP) function enabled, the machining program given by the CAD / CAM system is programmed in the specified workpiece coordinate system, and the programmed trajectory is the trajectory of the tool center point, usually composed of tiny line segments. Then, through the interpretation and execution of the numerical control device, and then through the reverse conversion, the position of the tool center point is converted into the position of each axis of the machine tool coordinate system to control the movement of the machine tool. [0003] In the small line segment path of the NC code with the tool center point control (RTCP) function turned on, a corner is formed between ev...

Claims

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Application Information

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IPC IPC(8): G05B19/408
CPCG05B19/4086G05B2219/35356
Inventor 韩文业田野刘冰左震宇李博哈韬
Owner SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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