CN212693967U

CN212693967U - Comprehensive performance test system for stepping motor

Info

Publication number: CN212693967U
Application number: CN201921775481.8U
Authority: CN
Inventors: 章五明
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2021-03-12
Anticipated expiration: 2029-10-22

Abstract

A stepping motor comprehensive performance test system is composed of a stepping motor operation parameter setting instrument, six stepping motor drivers with the same specification and six groups of motor test fixtures with the same specification; the test system can simultaneously detect the steering, torque, angle, current and insulation and voltage resistance of the six stepping motors. Each of the six groups of motor test fixtures is composed of a three-rod cylinder 1, two spring clamping plates 2 and 4, a first spring 3, two ejector rods (installed between a motor base and the spring clamping plates), a motor base 5, a first coupler 6, a second spring, a connecting shaft 8, two bearing seats 7 and 9, a weight tray 10, a weight 15, a second coupler 12, an angle sensor 13, a bottom plate, a cushion block, a weight pushing cylinder 16 and a proximity sensor.

Description

Comprehensive performance test system for stepping motor

Technical Field

The invention belongs to the field of testing, and relates to a novel stepping motor comprehensive performance testing system. The test system is mainly used for a production line of the stepping motor and is used for detecting the rotation direction, the rated output torque value, the rotation angle value, the driving current value and the insulation and voltage resistance of the stepping motor.

Background

The stepping motor is an open-loop control device which converts an electric pulse signal into angular displacement or linear displacement. Under the condition of no overload, the rotating speed and the stop position of the stepping motor only depend on the frequency and the pulse number of the pulse. The method has good start-stop performance and position precision. The method can be widely applied to various automatic control systems and intelligent household appliances.

After the production of the stepping motor is completed, the rated torque value of the stepping motor is generally required to be measured. At present, a stepping motor comprehensive performance tester in China mainly adopts a stepping motor driving power supply, and a weight, a motor seat and a weight tray are additionally arranged to test driving current data and detect rated torque.

The testing steps are as follows:

on the test power supply of the stepping motor, the output voltage value, the driving frequency value, the driving pulse direction-forward or reverse, and the current upper limit value and lower limit value are well regulated. And then the motor base is fixed on the edge of the workbench. The weights are tied on the weight tray made of metal materials by ropes.

After the preparation work is done, a worker sleeves a weight tray with weights on a motor shaft, sleeves a motor with the weights and the weight tray in a motor base, and finally inserts a lead of a stepping motor on a wiring board.

And then the test power supply of the stepping motor drives the stepping motor to rotate. In the rotation process, the power supply is tested by the stepping motor, and whether the current value in the rotation process of the motor is qualified or not is detected.

After testing for several seconds, if the current value alarm condition does not occur; and in the rotating process of the motor, the phenomenon of locked rotor does not occur, and the motor is considered to be a qualified product. The worker pulls the lead wire of the stepping motor off the wiring board. And stopping the stepping motor. And then the stepping motor is taken down from the motor base. Then the weight tray is detached from the shaft of the stepping motor.

After these steps are completed, the test is complete. If a motor stalling condition or a current alarm condition occurs. It indicates that the motor product is of poor quality. Additional processing is required.

This test method is because the worker needs to mount and dismount the weight and weight tray by hand without stopping during the test of each stepping motor. There is a problem that the test efficiency is relatively low. Moreover, because the weight is heavy, repeated loading and unloading are carried out for many times, so that the labor intensity of workers is high.

Some miniature speed reducing stepping motors have small plastic speed reducing gears inside. The clearance of the gears is small, if there is tiny metal debris between the gears, or if the gears have broken teeth. The motor may be out of step or locked during rotation. When the motor torque is too small or the quality of the internal components is poor, the motor will have the step-out condition of stopping when rotating in the rotating process.

The test apparatus and test method described above. Because the angular value of the stepper motor during rotation is not detected. Therefore, such product failures are often not detected in a timely manner.

A domestic miniature speed reduction stepping motor production line. The yield of eight hours a day is about ten thousand. In the test position of the moment characteristic, a worker needs to complete the test work of one motor in several seconds on average. Because the test speed is fast. Workers need to continuously plug and pull the wiring sections of the motor. And continuously loading and unloading the weight tray. So the worker has no time to observe and pay attention to whether the steering and the angle of the motor are qualified or not; many times, it is too late to observe whether the stepping motor is out of step or locked in rotation.

This angle detection problem has not been solved well. The miniature speed-reducing stepping motor has some products with the quality problems of step loss and locked rotor. Some of the samples cannot be found in time during delivery inspection.

In view of such a situation. There are many technicians and quality control personnel of the stepping motor manufacturer, and there is a desire to further improve the product quality due to better development productivity. In particular, it is desirable to improve the test fixture for the stepping motor on the production line and design more advanced test instruments. So as to reduce the labor intensity of workers and improve the testing efficiency of products; meanwhile, many enterprises also want to be able to solve the problem of angle detection of the stepping motor.

Disclosure of Invention

The technical problem solved by the invention is as follows: the defects of the prior art are overcome, and a comprehensive characteristic test scheme of torque, angle, steering, current and voltage-resistant insulation of the stepping motor is provided, so that the problems of insufficient test efficiency and insufficient test effect in the test process of the stepping motor are solved.

The technical solution of the invention is as follows: the stepping motor comprehensive performance testing system consists of three parts, namely a stepping motor operation parameter setting instrument, six stepping motor drivers with the same specification and six groups of motor testing jigs with the same specification; the test system can simultaneously detect the steering, torque, angle, current and insulation and voltage resistance of the six stepping motors; the connection mode of the three components is as follows: the stepping motor operation parameter setting instrument sends related parameters to a stepping motor driver through a power line and a signal connecting line; the stepping motor driver controls the stepping motor to move through the electric connecting wire, and simultaneously controls the air cylinder of the motor test fixture to perform corresponding work, so that the steering, torque, angle, current and insulation and voltage resistance of the motor are detected.

Each group of the six groups of motor test fixtures consists of three cylinders, two spring clamping plates, a spring, two ejector rods (installed between a motor base and the spring clamping plates), a motor base, a coupler, a second spring, a connecting shaft, two bearing seats, a weight tray, a weight, a second coupler, an angle sensor, a bottom plate, a cushion block, a weight pushing cylinder and a proximity sensor.

The stepping motor driver is provided with three groups of power input interfaces and four groups of signal input and output interfaces; a liquid crystal display screen. The liquid crystal display screen is used for displaying 'relevant setting parameters for driving the stepping motor to operate' and parameter values in the motor operation process; the first group of power input interfaces are used for inputting 0-32V direct current power; the second group of power input interfaces are used for inputting a 24V direct-current power supply; and the third group of power input interfaces are used for inputting a 600V alternating current power supply for a withstand voltage test. Signal input/output interface section: the first group of signal interfaces are connected with the three electromagnetic valves on the test fixture, and are also connected with the proximity sensors on the motor propulsion cylinders and used for controlling the actions of the three cylinders; the second group of signal interfaces are connected with the motor test board and used for providing pulse voltage signals for the motor to be tested; the third group of signal interfaces are connected with the angle sensor and used for receiving angle signals sent by the angle sensor; and the fourth group of signal interfaces are connected with the stepping motor operation parameter setting instrument and are used for receiving the stepping motor operation parameter setting value.

Step motor operation parameter setting instrument mainly used for setting step motor's operation parameter, including: the driving voltage value, no-load running frequency, pulse number, steering, angle value, current value upper and lower limit data, insulation voltage test value and insulation voltage resistance alarm current value of the stepping motor.

The motor base is used for placing a tested motor, the front surface of the motor base is of a concave structure, and the stepping motor can be plugged into the motor base; through holes are formed in the two sides of the motor base, and a screw can be installed to fix the motor base on a top plate of the air cylinder; the back of motor cabinet has the round hole of concave going for let two ejector pins move about inside, when the motor material returned, through the outside motion of two ejector pins, push out the motor from the motor cabinet.

Compared with the prior art, the invention has the advantages that:

(1) the invention can automatically clamp the motor. The motor shaft is connected with the first coupling through the air cylinder. And the actual angle and direction of the motor operation can be measured. The production efficiency is improved, and meanwhile, the product quality level of the tested motor is improved. The motor produced by a motor manufacturer has higher product quality level and lower production cost.

(2) The invention can measure the current, moment, steering and angle parameters of the stepping motor and can automatically measure the insulation and voltage resistance of the motor. Two processes of the production line of the stepping motor are combined on one working post, so that the production efficiency is improved, and the production cost of the motor is saved.

Drawings

FIG. 1 is a schematic view of a testing fixture according to the present invention.

FIG. 2 is a schematic diagram of the system of the present invention.

Detailed Description

As shown in fig. 2, the system for testing the comprehensive performance of the stepping motor comprises a stepping motor operation parameter setting instrument, six stepping motor drivers with the same specification, and six groups of motor testing jigs with the same specification; the test system can simultaneously detect the steering, torque, angle, current and insulation and voltage resistance of the six stepping motors. The connection mode of the three components is as follows: the stepping motor operation parameter setting instrument sends related parameters to a stepping motor driver through a power line and a signal connecting line; the stepping motor driver controls the stepping motor to move through the electric connecting wire, and simultaneously controls the air cylinder of the motor test fixture to perform corresponding work, so that the steering, torque, angle, current and insulation and voltage resistance of the motor are detected.

Each of the six groups of motor test fixtures is composed of a three-rod cylinder (1), a first spring clamp plate (2) and a second spring clamp plate (4), a first spring (3), a first ejector rod and a second ejector rod (installed between a motor base and the spring clamp plates), a motor base (5), a first coupler (6), a second spring, a connecting shaft (8), a first bearing seat (7) and a second bearing seat (9), a weight plate (10), weights (15), a second coupler (12), an angle sensor (13), a bottom plate, a cushion block, a weight pushing cylinder (16) and a proximity sensor, as shown in fig. 1. The motor base is used for placing a tested motor, the front surface of the motor base is of a concave structure, and the stepping motor can be plugged into the motor base; through holes are formed in the two sides of the motor base, and a screw can be installed to fix the motor base on a top plate of the air cylinder; the back of motor cabinet has the round hole of concave going for let two ejector pins move about inside, when the motor material returned, through the outside motion of two ejector pins, push out the motor from the motor cabinet.

The stepping motor driver is provided with three groups of power input interfaces and four groups of signal input and output interfaces; a liquid crystal display screen; the liquid crystal display screen is used for displaying 'relevant setting parameters for driving the stepping motor to operate' and parameter values in the motor operation process; the first group of power input interfaces are used for inputting 0-32V direct current power; the second group of power input interfaces are used for inputting a 24V direct-current power supply; the third group of power input interfaces are used for inputting a 600V alternating current power supply for a withstand voltage test; signal input/output interface section: the first group of signal interfaces are connected with the three electromagnetic valves on the test fixture, and are also connected with the proximity sensors on the motor propulsion cylinders and used for controlling the actions of the three cylinders; the second group of signal interfaces are connected with the motor test board and used for providing pulse voltage signals for the motor to be tested; the third group of signal interfaces are connected with the angle sensor and used for receiving angle signals sent by the angle sensor; and the fourth group of signal interfaces are connected with the stepping motor operation parameter setting instrument and are used for receiving the stepping motor operation parameter setting value.

The working process of the whole test system is as follows: after the worker places step motor in the motor cabinet, insert step motor's lead wire on the motor wiring board again, step motor driver can detect the motor return circuit this moment, has current data to produce, so step motor driver, through the solenoid valve, the control motor impels the cylinder, impels step motor toward first shaft coupling in. And connecting the rotating shaft of the stepping motor with the connecting shaft of the jig. And meanwhile, the driver also drives the stepping motor to rotate, and the driving frequency value of the stepping motor is adjusted to be the no-load rotating frequency.

When the stepping motor and the coupler are well connected, the stepping motor is pushed into a proximity sensor on a cylinder by the motor to detect the stepping motor and the coupler. The stepper motor driver then automatically adjusts the drive frequency of the stepper motor to the load rotation frequency. And the stepping motor drives the weights to rotate according to the preset pulse number. In the rotating process, the stepping motor controller receives an angle value signal sent by the angle sensor.

When the pulse number of the stepping motor driving the weight to operate reaches a preset value, the stepping motor stops operating. Then, a stepping motor driver outputs 600V alternating current voltage to the stepping motor to carry out withstand voltage test. After the pressure resistance test is finished, the stepping motor driver sends out a control signal to control the weight to push the cylinder to move upwards so as to jack the weight. Then the step motor driver sends out a control signal to drive the motor to retract the cylinder. The motor will be under the effect of spring, and the first shaft coupling of separation earlier, two ejector pins in being promoted the cylinder by the motor next, push out.

At the moment, if the motor detection result is qualified, the buzzer in the stepping motor controller does not make a sound. The green light on the controller is illuminated. If the motor detection result is not qualified, a buzzer in the stepping motor controller makes a sound, and a red light in the stepping motor controller is lightened. The detection process of one motor is completely finished. By repeating the above processes, the comprehensive performance detection work of the next stepping motor can be carried out.

Claims

1. The utility model provides a step motor comprehensive properties test system which characterized in that: the device consists of three parts, namely a stepping motor operation parameter setting instrument, six stepping motor drivers with the same specification and six groups of motor testing jigs with the same specification; the connection mode of the three components is as follows: the stepping motor operation parameter setting instrument sends related parameters to a stepping motor driver through a power line and a signal connecting line; the stepping motor driver controls the stepping motor to move through the electric connecting wire, and simultaneously controls the air cylinder of the motor test fixture to perform corresponding work, so that the steering, torque, angle, current and insulation and voltage resistance of the motor are detected.

2. The stepping motor comprehensive performance testing system according to claim 1, characterized in that: six motor test fixture of the same specification of group, every group's tool is installed between motor cabinet and spring clamp by cylinder (1), first spring clamp (2) and second spring clamp (4), first spring (3), ejector pin and No. second ejector pin of three poles, motor cabinet (5), shaft coupling (6) No. one, No. two springs, connecting axle (8), bearing frame (7) No. one and bearing frame (9) No. two, weight dish (10), weight (15), shaft coupling (12) No. two, angle sensor (13), bottom plate, cushion, weight promotion cylinder (16), a proximity sensor is constituteed.

3. The stepping motor comprehensive performance testing system according to claim 2, characterized in that: the motor base is used for placing a motor to be tested, and the front surface of the motor base is of a concave structure and can be used for plugging the stepping motor; through holes are formed in the two sides of the motor base, and a screw can be installed to fix the motor base on a top plate of the air cylinder; the back of motor cabinet has the round hole of concave going for let two ejector pins move about inside, when the motor material returned, through the outside motion of two ejector pins, push out the motor from the motor cabinet.