RU2608330C2 - Automated meter of output characteristics of helical springs - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment and can be used for quality control of springs production stages. Automated meter of output characteristics of helical springs is characterized by that it includes step motor 20, output shaft 21 of which is connected with input shaft 5 of a measurement unit, which is installed on support 25, module 19 of step motor 20 control, module 18 of the process control, the input bus of which is connected to output bus of recorder 9, the output of which is connected to the first input of module 18 of the process control, the second input is connected to the output of comparator 12, and the first output is connected to the control input of key 16, the second output is connected to the setting input of integrator 17, the third output is connected with the setting input of analogue-and-storage unit 10, the fourth output is connected to the starting input of analogue-to-digital converter 8, and the output bus is connected to the input bus of module 19 of the step motor control, the output bus of which is connected to the input bus of step motor 20.

EFFECT: technical result is improvement the operation efficiency, simplification of setting the spring twisting step-by-step angle during the control and simplification of the control process and processing the results.

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Description

The invention relates to the field of measuring technology and can be used to automatically determine the magnitude of the moment created by a flat spiral spring or torsion bar with an unlimited twist angle, a flat spring working on bending or torsion, selective selection of springs close in characteristics with a given accuracy, quality control of technological steps the process of their manufacture.

A device for monitoring the torque of spiral springs (ed. St. USSR No. 1081446, G01L 3/10, publ. 03/23/1984, bull. No. 11), containing the base, socket, tightening the spindle with a control lever rigidly fixed to it, a sensor and Electromechanical drive associated with a twisting spindle.

A device for measuring the moment of coil springs (ed. St. USSR No. 777504, G01L 3/10, publ. 11/07/1980, bull. No. 41), which contains a movable part mounted in the housing using braces, a sensor for the angular position of the movable part , an amplifier, a torque sensor in the form of a permanent magnet mounted on a moving part, and fixed coils and a stiffener for stretch marks.

Known semiautomatic device for checking the torques of coil springs (ed. St. USSR No. 433367, G01L 3/10, publ. 06/25/1974, bull. No. 23), which contains a sleeve that is freely mounted on a twisting spindle, carrying a leash with a dog coupled to the ratchet spindle wheel, and two persistent cams, which determine in turn the magnitude of the angular descent of the tested spring, mechanically interacting with the hard tilt stops, two electromagnetic sensors, two load levers.

A known stand for monitoring the output characteristics of spiral springs (ed. St. USSR No. 1732196, G01L 3/10, publ. 05/07/1992, bull. No. 17), which contains an angle sensor, pulse counter, control unit, drive, comparator, integrator, analog-storage unit, current control unit, analog-to-digital converter, decoder, multiplexer, start-up unit, delay unit, drive, light source, photodetector, disk with a hole, angle sensor, support, electromagnetic frame, input shaft, output shaft, recorder.

The disadvantages of these devices include the presence of errors in the mechanisms for setting and counting the moments of twisting of the springs due to friction between moving structural members, the difficulty of measuring the parameters of springs and torsion bars with a small moment and a twist angle of more than one revolution, the lack of automated collection of information points on a given range of working angle springs, processing information about the quality of the springs and selecting springs with a registrar with similar characteristics, which is important for measuring instruments.

The closest in technical essence to the claimed technical solution, taken as a prototype, is an automated stand for monitoring the output characteristics of spiral springs (patent for invention No. 2526553, publ. 08.28.2014, bull. No. 24), which contains the output shaft of the stand connected to the clamp the inner end of the test spring, the clamp of the outer end of the test spring, connected to the input shaft of the stand, connected through a gearbox to an electric motor that is connected to the output of the drive control unit, reversing unit, decryption End of measurement, analog-to-digital converter, recorder, analog-to-memory unit, current control unit, pulse counter, the input of which is connected to the output of the angle sensor, and the information output with a decoder of the end of measurement, a comparator, the input of which is connected to the photodetector connected to the source light through the mirror of the optical system, an integrator, the output of which is connected to the input of the analog-storage unit, the output of which is connected to the input of the current control unit, the information output of which is connected to the input of the analog-qi field converter, the information output of which is connected to the input of the recorder, and the trigger output with the trigger input of the recorder, adjuster, rocker arm, moving balancing weight, electromagnet traction winding connected to the control outputs of the current control unit, electromagnet core mounted on the first arm of the rocker arm, which rigidly fixed to the output shaft of the stand, and on the second arm of the rocker arm there is a mirror of the optical system and a movable balancing weight, mechanically with unified with the adjusting device, a key whose output is connected to the integrator’s input, a measurement start block, a clutch assembly that connects the input shaft of the angle sensor to the input shaft of the stand, and its control input is connected to the control input of the key, the first input of the first AND element, the output of which through a reversing unit it is connected to the output of the drive and electric motor control unit and to the output of the clutch control unit, the first input of which is connected to the first output of the measurement start unit, and the second input is connected to the full-time inputs of the pulse counter, analog-memory unit, integrator and the output of the first OR element, the first input of which is connected to the second output of the measurement start block, the third output of which is connected to the first input of the drive control unit, and the second input of the first OR element is connected to the output of the second element And, the first input of which is connected to the output of the element NOT, the second input is connected to the output of the recorder and the first input of the third element And, the output of which is connected to the second input of the drive control unit, and the second input It is connected to the output of the decoder of the end of the measurement, the input of the element NOT and the first input of the second OR element, the second input of which is connected to the clock output of the pulse counter, and the output is connected to the third input of the drive control unit and the first input of the fourth element AND, the output of which is connected to the starting input of the analog a digital converter, and the second input is connected to the output of the comparator, to the second input of the first AND element, the key input and the triggering input of the analog-memory unit, and the input shafts of the angle sensor and the stage assembly the bench, the input shaft of the stand and the output shaft of the stand are located on supports and coaxially.

The disadvantages of the prototype include its low efficiency: low servo performance, the complexity of the scheme for setting the step-by-step angle of twisting of the spring during the control process, insufficient dynamic characteristics of the control process, the complexity of the control scheme for the control process and processing the results.

The technical result to which the invention is directed is to increase the efficiency of the bench: increase productivity by improving the dynamic characteristics of the control process, simplifying the task of setting the step-by-step angle of twisting of the spring in the control process by introducing a stepper motor and a stepper motor control module and simplifying the process control circuit control and processing of results by introducing a control process control module.

The technical result is achieved by the fact that in an automated measuring instrument of the output characteristics of coil springs, containing an analog-to-digital converter, the information output of which is connected to the input of the recorder, and the triggering output with the triggering input of the recorder, a comparator, the input of which is connected to the photodetector, and the output is connected to the control input analog-memory unit and the input of the key, the output of which is connected to the input of the integrator, the output of which is connected to the input of the analog-memory unit, the output of which is single with the input of the current control unit, the information output of which is connected to the input of an analog-to-digital converter, and the current control outputs are connected to the inputs of the measuring unit, which includes a clamp of the inner end of the tested spring, a clamp of the outer end of the tested spring, the input shaft, output shaft, connected to the rocker arm, at the end of the arm of which is mounted the core of the electromagnet, the traction winding of the electromagnet, a moving balancing weight, a photodetector connected to the light source through an optical mirror system, a new one is that a stepper motor is introduced into it, the output shaft of which is connected to the input shaft of the measuring unit, which is mounted on a support, a stepper motor control module, a control process control module, the input bus of which is connected to the output bus of the recorder, the output of which connected to the first input of the control module for the control process, the second input is connected to the output of the comparator, and the first output is connected to the control input of the key, the second output is connected to the installation input of the integrator, the third output is connected to the installation input of the analog-to-memory unit, the fourth output is connected to the triggering input of the analog-to-digital converter, and the output bus is connected to the input bus of the stepper motor control module, the output bus of which is connected to the input bus of the stepper motor.

An automated measuring instrument for the output characteristics of coil springs uses a point laser as a light source.

An automated measuring instrument for the output characteristics of coil springs uses a photoresistor as a photodetector.

The invention is illustrated in FIG. 1, which shows a structural-functional diagram of an automated meter of output characteristics of a spiral spring.

Here:

1 - output shaft;

2 - clamp the inner end of the spring;

3 - test spring;

4 - clamp the outer end of the spring;

5 - input shaft;

6 - rocker;

7 - balancing load;

8 - analog-to-digital Converter;

9 - the registrar;

10 - analog storage unit;

11 - current control unit;

12 - a comparator;

13 - photodetector;

14 - light source;

15 - a mirror;

16 - key;

17 - integrator;

18 - control process control module;

19 - module control the stepper motor;

20 - stepper motor;

21 - output shaft of a stepper motor;

22 - core of the electromagnet;

23 - traction winding of an electromagnet;

24 - adjusting device;

25 - support.

An automated meter of the output characteristics of coil springs contains an analog-to-digital converter 8, the information output of which is connected to the input of the recorder 9, and a trigger output with a trigger input of the recorder 9, a comparator 12, the input of which is connected to the photodetector 13, and the output is connected to the control input of the analog-memory block 10 and the input of the key 16, the output of which is connected to the input of the integrator 17, the output of which is connected to the input of the analog-memory block 10, the output of which is connected to the input of the control unit t com 11, the information output of which is connected to the input of the analog-to-digital converter 8, and the outputs of the current control unit 11 are connected to the inputs of the measuring unit, which includes a clamp 2 of the inner end of the test spring 3, clamp 4 of the outer end of the test spring 3, input shaft 5 , the output shaft 1, connected to the beam 6, at the end of the arm of which is installed the core 22 of the electromagnet, the traction winding 23 of the electromagnet, a moving balancing weight 7, a photodetector 13, connected to the light source 14 through an optical mirror 15 system, a stepper motor 20, the output shaft 21 of which is connected to the input shaft 5 of the measuring unit, which is mounted on the support 25, the control module 19 of the stepper motor 20, the control process control module 18, the input bus of which is connected to the output bus of the recorder 9, the output of which is connected to the first input of the control process control module 18, the second input is connected to the output of the comparator 12, and the first output is connected to the control input of the key 16, the second output is connected to the installation input of the integrator 17, the third output is connected to the with the analog input of the analog-memory unit 10, the fourth output is connected to the triggering input of the analog-to-digital converter 8, and the output bus is connected to the input bus of the stepper motor control module 19, the output bus of which is connected to the input bus of the stepper motor 20.

In an automated meter of output characteristics of coil springs, a point laser is used as the light source 14.

In an automated meter of output characteristics of coil springs, a photoresistor is used as a photodetector 13.

Automated meter output characteristics of coil springs is as follows. Before installing the test spring 3 in the clamps 2 and 4 with the adjusting device 24, the balancing weight 7 is moved along the arm of the rocker arm 6, focusing on the operation of the comparator 12 according to its indication of balancing the rocker arm 6 when the optical receiver 13 is illuminated. Next, the test spring 3 is installed in the clamps 2 and 4 inner and outer ends of the spring.

After that, a number, a measuring range, the number of controlled points of the characteristics of the tested spring 3 are entered into the registrar 9. Next, the control process is activated by the operator’s command and at the output of the registrar 9, through the first input of the control process control module 18, a signal appears that generates signals sequentially in time : through the second and third outputs, the output of the integrator 17 and the analog-memory unit 10 is reset to zero, and through the first output, the control process control module 18 opens the key 16 for the signal passes from the comparator 12 to the integrator 17, then turns the stepper motor 20 to the first point of control of the characteristic by a series of pulses corresponding to rotation by a given angle, which creates a corresponding measured moment, which is transmitted through the test spring 3 to the rocker 6, which deviates from equilibrium and is triggered the comparator 12, and through the key 16, the integrator 17 and the analog-memory unit 10 creates a smoothly increasing current in the traction winding of the electromagnet 23 to compensate for the created moment. At the moment of balancing the rocker 6, the comparator 12 is activated in the initial zero position, fixing the mechanical balance of the rocker 6 as a result of exposure to the light source 14 through the mirror 15 of the photodetector 13, turns on the analog-memory unit 10 and starts from the fourth output of the analog through the second input of the control process control module 18 -digital converter 8 for fixing digital information about the value of the created moment of current compensation in the traction winding 23 of the electromagnet, which through the information output of analog-digital the transducer 8 is entered into the recorder 9 by the pulse of the end of the measurement, in which, after storing through the first input of the control module 18, the control process starts the control process of the next measuring point of the characteristics of the tested spring 3 in the recorder 9, this periodic process continues until the end of the specified measuring range, those. number of measurement points. In the control process, for example, it is possible to indicate programmatically on the screen of the recorder 9 the set parameters for monitoring the output characteristics of the test spring 3 in the form of a graph, etc.

Further, according to the program of the recorder 9, through the control process control unit 18, the key 16 is sequentially closed, the information of the integrator 17 and the analog-memory unit 10 is reset, the stepping motor 20 is continuously turned back on to the zero starting point of the start of the control process, which is fixed by the operation of the comparator 12 when illuminated by the source 14 light through the mirror 15 of the photodetector 13. After that, the test spring 3 is removed from the measuring unit.

According to the results of the collection in the registrar 9 of information about the required sample of the tested springs 3, the registrar program for processing and selecting paired tested springs 3 with a given accuracy of selection is included.

All blocks and modules in the meter are implemented on well-known analog and digital integrated circuits and electromechanical elements.

Thus, the inventive automated meter output characteristics of coil springs can improve the efficiency of the meter by increasing productivity, which is achieved by improving the dynamic characteristics of the control process. This result is achieved by simplifying the scheme for setting the step-by-step angle of rotation of the spring in the control process by eliminating a number of blocks from the control scheme of the control process for controlling the angle of rotation of the tested spring and reversing the twist to its original position by entering a stepper motor and a stepper motor control module, as well as simplification of the control process of the control process and processing of control results by introducing a control process control module.

Claims (3)

1. An automated meter of the output characteristics of coil springs, containing an analog-to-digital converter, the information output of which is connected to the input of the recorder, and the triggering output with the triggering input of the registrar, a comparator whose input is connected to the photodetector, and the output is connected to the control input of the analog-memory unit and the key input, the output of which is connected to the input of the integrator, the output of which is connected to the input of the analog-storage unit, the output of which is connected to the input of the current control unit, inf the radiation output of which is connected to the input of an analog-to-digital converter, and the current control outputs are connected to the inputs of the measuring unit, which includes a clamp of the inner end of the test spring, a clamp of the outer end of the test spring, the input shaft, the output shaft connected to the beam at the end of the arm which is installed the core of the electromagnet, the traction winding of the electromagnet, a moving balancing load, a photodetector connected to a light source through a mirror of the optical system, characterized in that a stepper motor is introduced, the output shaft of which is connected to the input shaft of the measuring unit, which is mounted on the support, a stepper motor control module, a control process control module, the input bus of which is connected to the recorder output bus, the output of which is connected to the first input of the control process control module, the second the input is connected to the output of the comparator, and the first output is connected to the control input of the key, the second output is connected to the installation input of the integrator, the third output is connected to the installation input analog-to-memory unit, the fourth output is connected to the triggering input of the analog-to-digital converter, and the output bus is connected to the input bus of the stepper motor control module, the output bus of which is connected to the input bus of the stepper motor. 2. An automated meter for the output characteristics of coil springs according to claim 1, characterized in that a point laser is used as a light source. 3. An automated meter for the output characteristics of coil springs according to claim 1, characterized in that a photo resistor is used as a photodetector.

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