CN110887649A - Reliability test method for meta-motion assembly unit - Google Patents
Reliability test method for meta-motion assembly unit Download PDFInfo
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Abstract
The invention provides a reliability test method for a meta-motion assembly unit, which is characterized by comprising the following steps of: directly decomposing an electromechanical product to be tested into element motion assembly units according to a structured decomposition method; 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; 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. The invention has the advantages that: the reliability test method for the meta-motion assembling unit provided by the invention has the advantages that the performance analysis is effectively carried out on the meta-motion assembling unit, and the accuracy of reliability evaluation is improved.
Description
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:
① the reliability test method of the meta-motion assembly unit starts with the performance test of the meta-motion assembly unit, builds a model of a performance analysis test bed of the meta-motion assembly unit, and analyzes the related reliability of the meta-motion assembly unit.
② the invention provides a reliability test method for a meta-motion assembly unit, which effectively performs performance analysis on the meta-motion assembly unit and improves the accuracy of reliability evaluation.
③ the invention provides a feasible method for testing reliability of element motion, which can reflect the performance of element motion visually, show the performance of element motion in image form, and has easy data storage, processing, visual expression, reliability fluctuation, and accurate reliability analysis.
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.
(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.
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 (7)
1. A reliability test method for a meta-motion assembly unit is characterized by comprising 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.
2. The method for testing reliability of a meta-motion assembled unit as claimed in claim 1, wherein the performance of the meta-motion assembled unit in step (3) includes smoothness and reliability.
3. The meta-motion assembly unit reliability test method according to claim 1 or 2, wherein 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.
4. The meta motion assembly unit reliability test method according to claim 3, wherein the bench model of the meta motion assembly unit in the step (3) 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.
5. A meta-motion assembly unit reliability test method as claimed in claim 4, characterized in that the stabilized voltage power supply adopts 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.
6. The method for testing the reliability of the meta-motion assembly unit according to claim 5, wherein 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-.
7. The method for testing the reliability of the meta-motion assembly unit according to claim 6, wherein the power supply refers to a 5V direct current power supply for the operation of the optocoupler module, and the direct current power supply is a direct current power supply converted from MS-10-5 and 220V to DC 5V.
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