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Workpiece Measuring System Based on Five-Axis CNC System

A technology of numerical control system and measurement system, applied in the field of measurement, can solve the problems of complex implementation of acquisition system, lack of versatility and scalability, and poor real-time performance of data acquisition, and achieves high measurement accuracy, low cost, and good real-time performance. Effect

Active Publication Date: 2011-12-14
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the prior art that the data acquisition of each axis of the numerical control system is not strong in real time, the acquisition system is complicated to realize and does not have versatility and scalability, and proposes a workpiece measurement based on a five-axis numerical control system system

Method used

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  • Workpiece Measuring System Based on Five-Axis CNC System
  • Workpiece Measuring System Based on Five-Axis CNC System
  • Workpiece Measuring System Based on Five-Axis CNC System

Examples

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Embodiment 1

[0030] The workpiece measurement system based on the five-axis numerical control system of the present invention includes an industrial computer, a counting device and a displacement sensor. The feedback signal of the absolute encoder of the motion axis in the numerical control system is directly sent to the counting device, and the counting device transmits the collected data to the industrial computer. The displacement sensor sends the displacement signal of the detected workpiece surface to the industrial computer.

[0031] This embodiment takes Siemens 840D numerical control system as an example. Siemens 840D is a five-axis CNC system, including three feed axes of X, Y, and Z, and two rotation axes of A, C. The interface of each axis (DB25, including encoder signal and temperature sensor signal) is connected to the socket (x411 or x412) on the 611D digital servo module. The encoders of each axis of the numerical control system described in this embodiment are composed of:...

Embodiment 2

[0052] Such as figure 1 , 2As shown, the difference from Embodiment 1 is that in addition to the industrial computer, the counting device and the displacement sensor, there is also a subdivision box, and the subdivision box is one or more, and the numerical control system has an incremental encoder The feedback signal of the shaft is divided into two parallel branches through the subdivision box, and each subdivision box sends one signal (TTL) to the counting device; the other signal of each subdivision box is sent to the counting device in the original way The position signal of the incremental encoder is fed back to the servo driver of the numerical control system to form a position closed loop; the counting device has a pulse counting card and a multi-function counting card, wherein the pulse counting card receives the feedback signal of the incremental encoder through the subdivision box, and more The function counter card receives the feedback signal of the absolute enco...

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Abstract

The invention aims at providing a workpiece measuring system based on a five-axis numerical control system to solve the problems of the prior art that the real-time property of acquisition of running data of all the axes of the numerical control system is not strong, the acquisition system is complicated to realize, and the numerical control system does not have generality and expansibility. A counting device acquires encoder feedback signals of motor encoders of all the axes of a numerical control machine; a displacement sensor is arranged at the cutter clamping part of the numerical controlmachine, and used for replacing the cutter, detecting the displacement signals from the displacement sensor to the surface of the workpiece and sending the signals to a industrial control machine; and the industrial control machine is used for reading the encoder feedback signals and displacement signals regularly, and processing the encoder feedback signals and displacement signals to obtain a three-dimensional point set of the workpiece. The workpiece measuring system has good real-time property, generality and expandability; and the hardware is connected simply, conveniently and reliably, thus the workpiece measuring system is convenient to use and operate, and has high measuring precision.

Description

technical field [0001] The invention relates to technologies such as numerical control machining, computer control and software programming, and belongs to the field of measurement, in particular to a workpiece measurement system based on a five-axis numerical control system. Background technique [0002] During the measurement process of the numerical control system, the real-time data acquisition of each axis of the numerical control system of the machine tool becomes a key link in the measurement process. The data acquisition of machine tool numerical control system can be roughly divided into the following categories: (1) Based on the standard communication interface of numerical control machine tools. This method is simple to implement, low in cost, and can collect digital and analog signals. However, the real-time performance of the collected data is not good, and the system does not have versatility and scalability; (2) Based on the electrical circuit of the CNC mach...

Claims

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Application Information

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IPC IPC(8): B23Q17/00B23Q17/20
Inventor 赵吉宾刘其广刘伟军李家智颜悦吕杰于彦凤
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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