CN110887649B

CN110887649B - A Reliability Test Method for Element Action Assembly Unit

Info

Publication number: CN110887649B
Application number: CN201911140894.3A
Authority: CN
Inventors: 葛红玉; 刘宝强; 王拓; 刘园
Original assignee: Xian University of Science and Technology
Current assignee: Xian University of Science and Technology
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2021-10-19
Anticipated expiration: 2039-11-20
Also published as: CN110887649A

Abstract

The present invention provides a reliability test method for a unit motion assembly unit, which is characterized in that the test method includes the following steps: directly decomposing an electromechanical product to be tested into unit motion assembly units according to a structured decomposition method; The requirements of the product and the definition of the meta-action assembly unit determine the specific composition of the meta-action assembly unit. The specific composition of the meta-action assembly unit includes a power source, a support, an actuator, an intermediate transmission and a fastener. Five Part; establishing a test-bed model of the meta-action assembly unit, and then performing a performance test of the meta-action assembly unit on the test-bed model. The advantages of the present invention are that: the invention provides a reliability test method for a meta-action assembly unit, which effectively analyzes the performance of the meta-action assembly unit and improves the accuracy of reliability evaluation.

Description

Reliability test method for meta-motion assembly unit

Technical Field

The invention belongs to the technical field of performance analysis of a meta-motion assembly unit of electromechanical equipment, and particularly relates to a reliability test method of the meta-motion assembly unit.

Background

The modern electromechanical product is a complex system with integral functions and integrating machinery, electrical appliances and electronic equipment, and is a high-tech product formed by integrating a multidisciplinary technology on a mechanical carrier. The device is characterized by high integration of structures, multiple functions and strong motion control capability.

The electromechanical product is a whole formed by different units according to related rules and mechanisms, the interaction, response, connection, excitation, transmission and dissipation accumulation among the units are expressed as the characteristics of the product, and in order to realize the functions of the main body, different mechanical element action units are required to be matched to complete different actions. The mechanical element action unit is a basic unit for ensuring the reliability of mechanical functions. At present, the methods commonly used in the reliability analysis of electromechanical products include markov, fault tree analysis and the like, which mainly use single indexes such as fault rate and the like to evaluate the reliability, but in practical problems, faults are often correlated and multilevel, and the reliability of the products can be reduced by adopting the single methods for analysis.

The numerical control machine tool in the electromechanical product is a typical representative, which is the basis of the manufacturing industry, the name of the industrial parent is a symbol of the high and low manufacturing level of the country, and with the development of the electronic information technology, the machine tool in the world has entered the electromechanical integration era with the core of the digital manufacturing technology. The structure of the numerical control machine tool becomes more complex, the problems of inaccurate result, large deviation and the like can occur if the product performance is evaluated by directly analyzing the reliability of the whole machine tool, and the workload of the evaluation by adopting the method is very large and the realizability is small. Therefore, reliability evaluation by using the meta-motion assembling unit can be considered, but currently, research on the performance of the meta-motion assembling unit still stays in a theoretical stage, and there is no method for testing the reliability of the meta-motion assembling unit.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a reliability test method for a meta-motion assembling unit, aiming at effectively carrying out performance analysis on the meta-motion assembling unit and improving the accuracy of reliability evaluation.

A reliability test method for a meta-motion assembly unit comprises the following steps:

(1) directly decomposing an electromechanical product to be tested into element motion assembly units according to a structured decomposition method;

(2) determining the specific composition of the meta-motion assembly unit according to the requirements of the electromechanical products and the definition of the meta-motion assembly unit, wherein the specific composition of the meta-motion assembly unit comprises five parts, namely a power source, a supporting part, an executing part, a middle transmission part and a fastening part;

(3) and establishing a test bed model of the meta-motion assembly unit, and then carrying out performance test on the meta-motion assembly unit on the test bed model.

Preferably, the performance of the element motion assembly unit comprises smoothness and reliability.

Preferably, the functions of the power source, the supporting member, the executing member, the intermediate transmission and the fastening member in the step (2) are respectively as follows: the power source is used for providing power for the element motion movement, and comprises a motor for directly providing power and power output by the element motion movement; the supporting piece is used for supporting parts of the executing piece; the executing part is used for outputting the element action, and the output result of the element action comprises rotating speed, torque, power and force; the intermediate transmission is used for transmitting the power provided by the power source to the executing piece; the fastener is used for fixing the element action assembling unit and is a foundation for mounting each part of the element action assembling unit.

Preferably, the bench model of the meta motion assembly unit in the step (3) includes: the device comprises a voltage-stabilized power supply, a motor driver, a motor, a unit action assembly unit, an elastic coupling, a bearing support, a bearing, a rotating speed sensor, a signal output cable, an optocoupler module, a multifunctional data acquisition card, application program development software, driver program software and a signal output terminal.

Preferably, the stabilized voltage power supply adopts a PXN series linear direct current stabilized voltage power supply RXN-1503D; the motor and the motor driver adopt a Damak alternating current servo motor and a corresponding B2 series alternating current servo driver; the element action assembly unit adopts a worm rotating element action assembly unit; the elastic coupling adopts a quincunx elastic coupling, the design ensures the rotation coaxiality of the connecting end of the motor output shaft and the worm rotating element action assembly unit, and the transmission is accurate, the connection is accurate and firm; the bearing support adopts a T-shaped bearing support, the bearings adopt 6201 and 6202 bearings, the design ensures that the worm rotating element action assembly unit rotates flexibly, the bearings and the support are connected and reliably matched as snap spring snap ring elastic retainer rings, the radial heights of the two bearings are consistent, the fit clearance between the bearings and the worm rotating element action assembly unit is proper, and the coaxiality of the axis of the worm rotating element action assembly unit and the rotation center of the bearings is further controlled; the rotation speed sensor adopts a DK890 photoelectric rotation speed sensor and is used for measuring rotation speed and period, and the rotation speed sensor is of an NPN type; the signal output cable adopts a three-core shielding wire; the optical coupling module adopts an NPN (negative-positive-negative) ampere common anode connection method and has the function of converting an output signal of the rotating speed sensor into a signal which can be received by the multifunctional data acquisition card; the multifunctional data acquisition card adopts an American NI multifunctional data acquisition card USB-6002DAQ Labview and uses a counter mode; the application development software adopts application development software Labview 2018; the driver software adopts NI-DAQmx driver software; the signal output terminal adopts a computer.

Preferably, the connection mode of the rotation speed sensor and the signal output cable is as follows: the sensor is respectively connected with one end of a line 1, a line 2 and one end of a line 3 of the three-core shielding line, the other end of the line 1 is connected with the anode of a power supply, the other end of the line 2 is connected with the cathode of the power supply and the cathode of the multifunctional data acquisition card, and the other end of the line 3 is connected with the anode of the multifunctional data acquisition card; the anode of the power supply is connected with VCC, the cathode is connected with GND, and output signals are respectively 01+ and GND-.

Preferably, the power supply refers to a 5V direct current power supply for the work of the optocoupler module, and is a direct current power supply converted from MS-10-5 and 220V to DC 5V.

The invention has the advantages that:

starting from the performance test of the element action assembling unit, the reliability test method of the element action assembling unit builds a model of a performance analysis test bed of the element action assembling unit and analyzes the related reliability of the element action assembling unit.

The invention provides a reliability test method for the element motion assembly unit, which can effectively analyze the performance of the element motion assembly unit and improve the accuracy of reliability evaluation.

The reliability test method of the element motion assembly unit provides a feasible method for the element motion reliability test, so that the performance of the element motion can be reflected visually, the performance of the element motion is presented in an image form, data is easy to store and process, expression is visual, fluctuation of reliability can be seen, and reliability analysis can be performed accurately.

Drawings

Fig. 1 is a schematic structural diagram of a component of a meta motion assembly unit in embodiment 1 of the present invention;

fig. 2 is a schematic view of a connection manner of a rotation speed sensor and a signal output cable in embodiment 1 of the present invention;

FIG. 3 is a schematic view of a test bench model of a meta motion assembly unit and its working flow in embodiment 1 of the present invention;

FIG. 4 is a flowchart of a data collection procedure written in Labview software in example 1 of the present invention;

fig. 5 is a captured image of the rotational speed data of the worm element motion assembling unit displayed on the computer side in embodiment 1 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A reliability test method for a unit action assembly unit (a worm unit action assembly unit) comprises the following steps:

(1) and directly decomposing the electromechanical product to be tested into the element motion assembly unit according to a structured decomposition method.

(2) And determining the specific composition of the meta-action assembling unit according to the requirements of the electromechanical products and the definition of the meta-action assembling unit.

The specific composition of the element motion assembly unit (see figure 1) comprises five parts, namely a power source, a supporting part, an executing part, an intermediate transmission and a fastening part. And the functions of the five parts are respectively as follows: the power source is used for providing power for the element motion movement, and comprises a motor for directly providing power and power output by the element motion movement; the supporting piece is used for supporting parts of the executing piece; the executing part is used for outputting the element action, and the output result of the element action comprises rotating speed, torque, power and force; the intermediate transmission is used for transmitting the power provided by the power source to the executing piece; the fastener is used for fixing the element action assembling unit and is a foundation for mounting each part of the element action assembling unit.

The test bench model of the meta-motion assembly unit comprises: the device comprises a voltage-stabilized power supply, a motor driver, a motor, a unit action assembly unit, an elastic coupling, a bearing support, a bearing, a rotating speed sensor, a signal output cable, an optocoupler module, a multifunctional data acquisition card, application program development software, driver program software and a signal output terminal. The stabilized voltage power supply adopts a PXN series linear direct current stabilized voltage power supply RXN-1503D; the motor and the motor driver adopt a Damak alternating current servo motor and a corresponding B2 series alternating current servo driver; the element action assembly unit adopts a worm rotating element action assembly unit; the elastic coupling adopts a quincunx elastic coupling; the bearing support adopts a T-shaped bearing support; the bearings adopt 6201 and 6202 bearings; the rotation speed sensor adopts a DK890 photoelectric rotation speed sensor and is used for measuring rotation speed and period, and the rotation speed sensor is of an NPN type; the signal output cable adopts a three-core shielding wire; the optical coupling module adopts an NPN (negative-positive-negative) ampere common anode connection method and has the function of converting an output signal of the rotating speed sensor into a signal which can be received by the multifunctional data acquisition card; the multifunctional data acquisition card adopts an American NI multifunctional data acquisition card USB-6002DAQ Labview and uses a counter mode; the application development software adopts application development software Labview 2018; the driver software adopts NI-DAQmx driver software; the signal output terminal adopts a computer.

The connection mode of the rotation speed sensor and the signal output cable (see fig. 2) is as follows: the sensor is respectively connected with one end of a line 1, a line 2 and one end of a line 3 of the three-core shielding line, the other end of the line 1 is connected with the anode of a power supply, the other end of the line 2 is connected with the cathode of the power supply and the cathode of the multifunctional data acquisition card, and the other end of the line 3 is connected with the anode of the multifunctional data acquisition card; the anode of the power supply is connected with VCC, the cathode of the power supply is connected with GND, the output signals are respectively 01+ and GND-, and the power supply refers to a 5V direct current power supply for the work of the optocoupler module and is a direct current power supply converted from MS-10-5 and 220V to DC 5V.

And (3) carrying out performance test on the meta-motion assembly unit on the test bed model of the meta-motion assembly unit, wherein the specific process needs the cooperation of hardware and software. The hardware working process (see fig. 3) is as follows: the motor driver drives the motor to operate, the rotating speed of the motor is transmitted to the worm rotating element action assembly unit through the elastic coupling, the worm rotating element action assembly unit is supported by the T-shaped bearing support with the bearing, a rotating speed signal of the worm rotating element action assembly unit is collected by the rotating speed sensor, the voltage is converted into a signal which can be received by the multifunctional data collection card through the optical coupling module, and the signal is transmitted to the computer for analysis. The working process of the software is to adopt application program development software Labview2018 to collect data (see fig. 4), and then display the collected rotating speed data image of the worm rotating element action assembly unit through a computer terminal, and the specific process is as follows: and opening a software program diagram and a front panel, clicking to operate on the software program diagram, switching to the front panel to initialize the oscillogram, starting a counter, clicking a start button to obtain current counter data A1 and counter data A2 after 5 seconds, and dividing the difference between the current counter data A1 and the counter data A2 by the time of 5 seconds to obtain the rotating speed so as to generate the oscillogram. It is programmed to perform a feedback and acquisition in 5000 milliseconds, which is more accurate. The acquired data image results are curves corresponding to time and rotation speed (see fig. 5), the ordinate represents the value of the speed, and the abscissa shows the transformation law of time. The current speed value can be directly obtained through the curve, and the change trend of the speed in the latest period of time can also be observed; it can be seen from the figure that the starting torque is large when the motor is started, the speed is suddenly increased, and then the motor returns to normal; the rotating speed collected in the collecting process is consistent with the rotating speed set by the motor, the experimental requirements are met, and the worm rotating element action assembling unit has good reliability.

Claims

1. A method for testing reliability of an element action assembly unit, characterized in that, the testing method comprises the following steps:

(1) The electromechanical product to be tested is directly decomposed into element-action assembly units according to the structural decomposition method;

(2) Determine the specific composition of the meta-action assembly unit according to the requirements of the electromechanical product and the definition of the meta-action assembly unit. The specific composition of the meta-action assembly unit includes a power source, a support, an actuator, a Five parts of the intermediate transmission and the fastener; the functions of the power source, the support, the actuator, the intermediate transmission and the fastener are: the power source is used to provide the power of the meta-action movement, including providing the power directly The motor and the power output by the meta-action movement; the support is used to support the parts of the actuator; the actuator is used for the output of the meta-action, and the output of the meta-action includes rotational speed, torque, power and force; the intermediate transmission is used to transmit the power provided by the power source to the actuator; the fastener is used to fix the element-action assembly unit, which is the basis for installing each part of the element-action assembly unit;

(3) Establish a test-bed model of the meta-action assembly unit, and then perform a performance test of the meta-action assembly unit on the test-bed model; the performance of the meta-action assembly unit includes stability and reliability; The test bench model includes: stabilized power supply, motor driver, motor, element action assembly unit, elastic coupling, bearing support, bearing, speed sensor, signal output cable, optocoupler module, multi-function data acquisition card, application development software, driver software and signal output terminals;

The regulated power supply adopts PXN series linear DC regulated power supply RXN-1503D; the motor and motor driver adopts Demark AC servo motor and corresponding B2 series AC servo driver; the element action assembly unit adopts worm rotating element action Assembly unit; the elastic coupling adopts plum-shaped elastic coupling; the bearing support adopts T-type bearing support; the bearing adopts 6201 and 6202 bearings; the speed sensor adopts DK890 photoelectric speed sensor for Measure the speed and period, and the speed sensor is NPN type; the signal output cable adopts three-core shielded wire; the optocoupler module adopts the NPN common anode connection method, and its function is to convert the output signal of the speed sensor into The signal that the multi-function data acquisition card can receive; the multi-function data acquisition card adopts the US NI multi-function data acquisition card USB-6002 DAQLabview, and uses the counter mode; the application program development software adopts the application program development software Labview2018 ;

The driver software adopts NI-DAQmx driver software; the signal output terminal adopts a computer; the connection mode of the rotational speed sensor and the signal output cable is: One end is connected, and the other end of line 1 is connected to the positive pole of the power supply, the other end of line 2 is connected to the negative pole of the power supply and the negative pole of the multifunctional data acquisition card, and the other end of line 3 is connected to the positive pole of the multifunctional data acquisition card; The positive pole of the power supply is connected to VCC, the negative pole is connected to GND, and the output signals are 01+ and GND- respectively;

The power supply provides the 5V DC power supply for the optocoupler module to work, which is converted to DC5V DC power supply through MS-10-5, 220V.