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Drilling and tapping center rigid tapping acceleration and deceleration movement control method

A motion control, acceleration and deceleration technology, applied in the direction of digital control, program control, electrical program control, etc., can solve the problem that the rigid tapping speed and stability of the machining center cannot be met.

Active Publication Date: 2018-10-09
贵阳合众精密机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When performing low-speed rigid tapping, the spindle servo motor uses traditional acceleration and deceleration motion control algorithms, such as S-shape algorithm, trigonometric function algorithm, exponential algorithm, etc., which can basically meet the control requirements, while when performing high-speed rigid tapping At this time, the traditional acceleration and deceleration motion control algorithm is difficult to fundamentally solve the contradiction between the rapid stability of the system response and the high stability and precision, and cannot meet the requirements of fastness and stability for the rigid tapping of the machining center.

Method used

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  • Drilling and tapping center rigid tapping acceleration and deceleration movement control method
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  • Drilling and tapping center rigid tapping acceleration and deceleration movement control method

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Embodiment 1

[0037] Embodiment 1 of the present invention provides a rigid tapping acceleration and deceleration motion control method for drilling and tapping centers. The method can be implemented in system software based on hardware, and can generally be integrated in a numerical control system.

[0038]The method includes: a segmental approximation torque curve acceleration and deceleration motion control algorithm, and the algorithm is applied to the rigid tapping of the drilling center. The control method does not need to establish an accurate mathematical model of the mechanical characteristic torque curve of the motor. The method of segment approximation realizes the modeling of the mechanical characteristic torque curve, which meets the comprehensive index requirements of the system for the rapidity and smoothness of rigid tapping. figure 1 It is the segmented approach torque curve acceleration and deceleration algorithm speed segment diagram provided by Embodiment 1 of the present...

Embodiment 2

[0054] Embodiment 2 of the present invention provides that when the segmental approach torque curve is not a complete 9-segment linear acceleration and deceleration, but the actual highest tapping speed is between V2~V3, when the acceleration and deceleration speed is divided into 6 segments, according to the actual The method of back-calculating the speed, acceleration, displacement and time motion control parameters of each section of the curve from the tapping depth and the set speed.

[0055] figure 2 It is the 6-segment linear acceleration and deceleration algorithm speed segmentation diagram provided by the second embodiment of the present invention, as figure 2 As shown, the method includes:

[0056] Divide the speed of acceleration and deceleration into 6 sections (3 sections for acceleration section, 3 sections for deceleration section, no constant speed section) and approach the torque curve in sections. The starting speed of the first acceleration segment is Vs,...

Embodiment 3

[0073] Embodiment 3 of the present invention provides that when the segmented approach torque curve is not a complete 9-segment linear acceleration and deceleration, but the actual highest tapping speed is between V1~V2, when the acceleration and deceleration speed is divided into 4 segments, according to the actual The method of back-calculating the speed, acceleration, displacement and time motion control parameters of each section of the curve from the tapping depth and the set speed.

[0074] image 3 It is the 4-segment linear acceleration and deceleration algorithm speed segmentation diagram provided by the third embodiment of the present invention, as image 3 As shown, the method includes:

[0075] Divide the speed of acceleration and deceleration into 4 sections (2 sections for acceleration section, 2 sections for deceleration section, no constant speed section) and approach the torque curve in sections. The starting speed of the first acceleration segment is Vs, an...

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Abstract

The invention relates to a drilling and tapping center rigid tapping acceleration and deceleration movement control method, and the method is characterized by comprising the following steps: step 1, asegmented approximation torque curve is stored in a numerical control system, and the tapping depth and the acceleration of each complete acceleration section and each complete deceleration section are solved; the maximum speed of a plurality of acceleration sections, the speed of the curve uniform speed section and the maximum speed of the plurality of deceleration sections are equal; step 2, the numerical control system comprises a calculation module, the calculation module is used for calculating the input total tapping depth S and the tapping depth of each complete acceleration section and each complete deceleration section which are solved by the step 1: if the total tapping depth is larger than or equal to the sum of the tapping depths of each complete acceleration section and eachcomplete deceleration section, the calculation module is used for comparing and calculating the input instruction speed and the speed in the plurality of acceleration sections, and the tapping acceleration and the continuous time of each acceleration section and the deceleration section, and the tapping depth and the continuous time of the constant-speed section in the tapping process of the numerical control system.

Description

technical field [0001] The invention relates to the technical fields of numerical control technology and automatic control, in particular to a method for controlling the acceleration and deceleration motion of a drilling and tapping center for rigid tapping. Background technique [0002] Drilling and tapping center is a kind of CNC machine tool for cutting metal. It is the fastest and high-precision machine tool in the market that integrates cutting, drilling and tapping. Compared with other CNC machine tools, the main features of the drilling and tapping center are small and flexible, fast displacement speed, high spindle speed, fast drilling and tapping, and fast tool change speed. Due to its high-speed and high-precision processing characteristics, the drilling and tapping center is favored by the market. It is the key equipment for product part manufacturing, and the tapping speed of the drilling and tapping center is one of the important indicators to measure the perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/416
CPCG05B19/4163G05B2219/36521
Inventor 孔祥发卢俊
Owner 贵阳合众精密机械制造有限公司