CN212398999U

CN212398999U - Digit control machine tool motion axle performance detection device

Info

Publication number: CN212398999U
Application number: CN202021552208.1U
Authority: CN
Inventors: 管强; 席晨飞; 杨龙涛
Original assignee: Neway Cnc Equipment Suzhou Co ltd
Current assignee: Neway Cnc Equipment Suzhou Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-01-26
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses a numerically-controlled machine tool motion shaft performance detection device, including the motion shaft, shaft coupling and motor, the motion shaft passes through the shaft coupling and is connected with the motor, numerically-controlled machine tool motion shaft performance detection device still includes controller and computer, controller and computer and motor electric connection, the controller control motor rotational speed, the computer reads the current value of motor and evaluates, numerically-controlled machine tool motion shaft performance detection device can regard as the important consideration index of comprehensive evaluation motion shaft drive performance through detecting the magnitude of current magnitude and the undulant abnormal situation of driving motor, can satisfy the detection demand of machine tool motion shaft under the different motion state of low or high height, the feasibility is high, detect high-efficient, convenience, can reflect the comprehensive performance of machine tool motion shaft more comprehensively, according to evaluation analysis and data analysis, can fine guide the technology assembly process of machine tool, the dynamic comprehensive performance of the machine tool is improved.

Description

Digit control machine tool motion axle performance detection device

Technical Field

The utility model relates to a motion axle performance detects, especially relates to a digit control machine tool motion axle performance detection device.

Background

The development trend of numerical control machine tools is high speed and high precision. One of the expressions of speeding up is to increase the feed rate; the high precision makes more strict requirements on the geometric precision, the position precision and the dynamic performance of the motion axis of the machine tool. This is very much related to the performance control during machine tool assembly.

In order to ensure the performance of each motion axis of the machine tool, the machine tool is usually required to be detected and tested by adopting conventional methods such as geometric accuracy inspection, position accuracy inspection, machining trial cutting inspection and the like, and the performance level of the machine tool is judged according to the detection and test. However, the machine tool movement speed is very low during the detection of geometric accuracy and the detection of position accuracy, and the performance of the machine tool movement shaft in a medium-high speed movement state cannot be accurately measured.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, one of the purposes of the utility model is to provide a digit control machine tool motion axle performance detection device, digit control machine tool motion axle performance detection device can accurately measure the performance of lathe motion axle under the high-speed motion state in the middle and high.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

the device for detecting the performance of the moving shaft of the numerical control machine tool comprises the moving shaft, a coupler and a motor, wherein the moving shaft is connected with the motor through the coupler, the device for detecting the performance of the moving shaft of the numerical control machine tool further comprises a controller and a computer, the controller and the computer are electrically connected with the motor, the controller controls the rotating speed of the motor, and the computer reads and evaluates the current value of the motor.

Further, the device for detecting the performance of the moving shaft of the numerical control machine tool further comprises a moving part, and the moving part is in threaded connection with the moving shaft.

Furthermore, the device for detecting the performance of the moving shaft of the numerical control machine tool further comprises a nut, and the moving part is in threaded connection with the moving shaft through the nut.

Further, the device for detecting the performance of the moving shaft of the numerical control machine tool further comprises a bearing assembly, and the moving shaft is mounted on the bearing assembly.

Compared with the prior art, the utility model discloses digit control machine tool motion axle performance detection device can just can regard as the important consideration index of comprehensive evaluation motion axle drive performance through the current magnitude of value and the undulant abnormal conditions that detect driving motor, can satisfy the detection demand of lathe motion axle under the different motion state of low crowning, the feasibility is high, detect high-efficiently, it is convenient, can reflect the comprehensive properties of lathe motion axle comprehensively, according to aassessment analysis and data analysis, the technological assembling process of guidance lathe that can be fine, the dynamic comprehensive properties of lathe is improved.

Drawings

FIG. 1 is a schematic structural view of the device for detecting the performance of the moving shaft of the numerical control machine tool of the present invention;

fig. 2 is a flow chart of the method for detecting the performance of the moving axis of the machine tool of the present invention.

In the figure: 10. a moving part; 20. a guide rail; 30. a motion shaft; 40. a nut; 50. a coupling; 60. a bearing assembly; 70. a motor; 80. a controller; 90. and (4) a computer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present invention provides a device for detecting performance of a moving shaft of a numerical control machine tool, including a moving part 10, a guide rail 20, a moving shaft 30, a nut 40, a coupler 50, a bearing assembly 60, a motor 70, a controller 80, and a computer 90.

The moving member 10 is slidably mounted to the guide rail 20. The moving shaft 30 is connected to a motor 70 through a coupling 50. The moving shaft 30 is mounted to the bearing assembly 60. In the present embodiment, the moving shaft 30 is a lead screw. The moving shaft 30 is connected to the moving member 10 by a nut 40. The controller 80 and the computer 90 are electrically connected to the motor 70. The controller 80 is an NC control device. The controller 80 sends out a specific command to control the motor 70 to rotate, the motor 70 drives the moving shaft 30 to rotate through the coupling 50, the moving shaft 30 is matched with the moving part 10 through the nut 40 and converts the self rotating motion into the linear motion of the moving part 10, thereby completing the motion of the feeding shaft, and the guide rail 20 plays a role of supporting the moving part 10.

In the whole moving shaft 30 system, the weight of the moving part 10, the moving speed-acceleration, the mounting accuracy of the guide rail 20, the self-accuracy of the moving shaft 30, the coaxial mounting accuracy between the bearing assembly 60 and the moving shaft 30, and the like all have direct influence on the moving performance of the moving shaft 30, and are comprehensively reflected on the motor 70, and the change of the load torque and the current is reflected. Therefore, the magnitude of the current magnitude of the motor 70 and the abnormal condition of the fluctuation can be used as important consideration indexes for comprehensively evaluating the driving performance of the moving shaft 30.

With reference to fig. 2, a method for detecting the performance of a moving axis of a machine tool is applied to the device for detecting the performance of a moving axis of a numerical control machine tool, and the method for detecting the performance of a moving axis of a machine tool includes the following steps:

the controller 80 controls the motor 70 to drive the moving shaft 30 to rotate;

the computer 90 respectively collects data according to the three movement speeds of the motor 70:

making the collected data into a waveform data chart of the movement axis 30;

the stroke of the moving shaft 30 is divided into three sections, namely a starting section, a middle section and an adjacent stopping section;

calculating the wave rate of the waveform;

evaluating the fluctuation rate grade in the whole-course motion according to the fluctuation rate value;

evaluating the fluctuation rate grade in each section of motion according to the fluctuation rate value;

the performance of the movement axis 30 is evaluated with reference to the evaluation analysis table according to the fluctuation rate level in the whole movement and the fluctuation rate level in each section of movement.

The computer 90 is connected to the controller 80, and the computer 90 is pre-installed with data monitoring software, so that the relevant parameters of the motor 70 can be read according to a certain sampling frequency and monitoring data type and stored for subsequent analysis. The monitoring parameters are mainly as follows: the magnitude of the current value of the motor 70, the moving speed, the position, etc. of the moving part 10. In order to ensure the real-time performance of monitoring, the sampling interval time of the monitoring software is less than or equal to 1 ms. Waveform data maps of the monitored quantities are obtained by the monitoring software and recorded and stored for further data analysis and evaluation of the performance of the motion axis 30. As shown in the following figures:

the analysis and evaluation of the monitoring data of the moving axis 30 are performed as follows.

Dividing the stroke of the moving shaft 30 into 3 segments representing the initial segment, the middle segment and the adjacent stop segment of the moving shaft 30; wherein the initial segment and the adjacent stop segment are classified as one for evaluation, and the intermediate segment is evaluated separately.

The following parameters of the current values in the entire range and each section of the moving shaft 30 are calculated, respectively:

1) the waveform fluctuation rate δ is defined as:

in the formula, x (t) represents a data waveform of the current value monitoring parameter obtained by the monitoring software in a t time period, and the total number of the data points is N.

Dividing the fluctuation rate delta in the whole course and each section of the motion axis 30 into two grades A, B and A 'and B' according to the numerical value;

first, evaluating the fluctuation rate grade in the whole-course motion (A, B);

secondly, evaluating the fluctuation rate grades (A ', B') in each type of segmentation;

the performance of this motional axis 30 was evaluated with reference to the analysis evaluation table of table 1 below, giving evaluation results.

Table 1 performance analysis and evaluation table of motion axis monitoring data

The performance of the moving shaft 30 is determined according to the above analysis and evaluation results, and this is used as a criterion for determining whether the assembling performance of the moving shaft is acceptable. The adjustment should be made again for both the motional axes 30 evaluated as "normal" and "poor".

The utility model discloses lathe motion axle performance detection method just can regard as the important consideration index of comprehensive evaluation motion axle 30 drive performance through the magnitude of current magnitude and the undulant abnormal conditions that detect motor 70, can satisfy the detection demand of lathe motion axle 30 under the different motion state of low well high, method feasibility is high, it is high-efficient, and is convenient to detect, more can reflect the comprehensive properties of lathe motion axle 30 comprehensively, according to evaluation analysis and data analysis in the method, the technological assembling process of guidance lathe that can be fine, the dynamic comprehensive properties of lathe is improved.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims

1. The utility model provides a digit control machine tool motion axle performance detection device, includes motion axle, shaft coupling and motor, the motion axle passes through the shaft coupling with the motor is connected its characterized in that: the device for detecting the performance of the moving shaft of the numerical control machine tool further comprises a controller and a computer, wherein the controller and the computer are electrically connected with the motor, the controller controls the rotating speed of the motor, and the computer reads and evaluates the current value of the motor.

2. The numerical control machine tool movement axis performance detection device according to claim 1, characterized in that: the device for detecting the performance of the moving shaft of the numerical control machine tool further comprises a moving part, and the moving part is in threaded connection with the moving shaft.

3. The numerical control machine tool movement axis performance detection apparatus according to claim 2, characterized in that: the device for detecting the performance of the moving shaft of the numerical control machine further comprises a nut, and the moving part is in threaded connection with the moving shaft through the nut.

4. The numerical control machine tool movement axis performance detection device according to claim 1, characterized in that: the device for detecting the performance of the moving shaft of the numerical control machine tool further comprises a bearing assembly, and the moving shaft is arranged on the bearing assembly.