CN103035160A - High-frequency braking testing device and method thereof - Google Patents

Abstract

The invention discloses a high-frequency braking testing device and a method thereof. The high-frequency braking testing device comprises a test platform base, a sliding platform support frame, a horizontally-adjusting screw group, a ball lead screw sliding platform, a giant magnetostrictive actuator, a flexible hinge displacement amplifying mechanism, a pulse encoder, a pulse encoder support frame, a gear motor, a brake disc, a pulse encoder connecting frame, a first round nut, a second round nut, a pressing ring, a first cone roller bearing, an electromagnetic clutch, a main shaft, a clutch connecting key, a coupling connecting key, a second cone roller bearing, a sleeve, a tested mechanism fixing sleeve, a third cone roller bearing, a third round nut, an elastic coupling, a gear motor support frame and a motor shaft key. The high-frequency braking testing device is applicable to testing researches on high-frequency braking and particularly to testing researches on high-frequency braking with braking frequency more than 50 Hz. Giant magnetostrictive materials are adopted to be used as a driving original piece, the high-frequency braking testing device has the advantages of being quick in response, high in accuracy, easy and convenient to operate, convenient to adjust, easy to control, high in reliability and the like.

Description

A high-frequency braking experimental device and method thereof

technical field

The invention relates to a high-frequency braking experimental device, in particular to a high-frequency experimental device based on a giant magnetostrictive material and a method thereof.

Background technique

With the advancement of science, high-speed machining, as an advanced mechanical manufacturing method, has attracted widespread attention and developed rapidly in developed countries. For high-speed machining, fast positioning is a very important technology. With the improvement of processing speed and precision, the positioning accuracy of the system also needs to be improved accordingly. At the same time, in order to improve work efficiency, the positioning system is also required to respond quickly, accelerate and brake quickly so as to achieve rapid positioning. However, conventional braking technology is difficult to achieve high-speed and high-precision positioning requirements, so it is very urgent to explore the mechanism of high-frequency braking and carry out experimental research on high-frequency braking.

Giant magnetostrictive material is a new kind of intelligent material, its size can expand and contract in proportion to the external magnetic field, and its magnetostriction coefficient is much larger than that of traditional magnetostrictive materials, and it has fast response, strong output force, large strain, High power density and good reliability. So far, there have been researches on the application of GMM in different fields at home and abroad. The applications involve aerospace, national defense, electronics, machinery, petroleum, textiles, agriculture and many other fields, which have greatly promoted the technological progress of related industries. Because the giant magnetostrictive material has the above advantages, it is very suitable to be used as the driving element of the high-frequency braking test bench. The work of super-magnetostrictive materials requires a strong magnetic field as a drive. In applications, it is often necessary to use giant magnetostrictive actuators to provide the necessary driving magnetic field for giant magnetostrictive materials.

At present, common high-frequency braking experimental devices usually use piezoelectric ceramics as the driving element, but piezoelectric ceramics have low gauge coefficient, small output force, small output displacement, small electromechanical coupling coefficient, and poor heat resistance. Materials have great limitations in application to high-frequency braking. At present, there is no precedent for applying giant magnetostrictive materials to braking systems, and there is no relevant high-frequency braking experimental device based on giant magnetostrictive materials to provide high-frequency braking experimental support. Now people are longing for a high-frequency braking test bench control system based on giant magnetostrictive materials to solve practical problems.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a giant magnetostrictive high-frequency braking test bench driver and its method.

The high-frequency braking experimental device includes the base of the test bench, the slide bracket, the horizontal adjustment screw group, the ball screw slide, the giant magnetostrictive driver, the flexible hinge displacement amplification mechanism, the pulse encoder, the pulse encoder bracket, and the tested mechanism , the sliding table bracket is fixed on the base of the test bench through the horizontal adjustment screw group, the ball screw sliding table is vertically fixed on the sliding table bracket, and the giant magnetostrictive driver is vertically fixed on the ball screw sliding table through the giant magnetostrictive driver bracket. On the platform, the flexible hinge displacement amplification mechanism is fixed on the displacement output end of the giant magnetostrictive driver, the pulse encoder bracket is fixed on the base of the test bench, and the pulse encoder is fixed on the pulse encoder bracket. Moving plate, pulse encoder connecting frame, first round nut, second round nut, pressure ring, first tapered roller bearing, electromagnetic clutch, main shaft, clutch connection key, coupling connection key, second tapered roller bearing , sleeve, fixed sleeve of the tested mechanism, third tapered roller bearing, third round nut, elastic coupling, deceleration motor bracket, motor shaft key, pressure ring, brake disc, first tapered roller bearing, electromagnetic The clutch is connected in sequence and fixed on the main shaft through the first round nut and the second round nut. The pulse encoder connecting frame is bonded to the brake disc and connected with the input shaft of the pulse encoder. The main shaft passes through the second tapered roller bearing. , the sleeve, the third tapered roller bearing, and the third round nut are fixed on the fixed sleeve of the tested mechanism, one end of the elastic coupling is connected to the main shaft, the other end of the elastic coupling is connected to the geared motor shaft, and the geared motor is fixed by the geared motor bracket On the base of the test bench, there are clutch connection keys and coupling connection keys on the main shaft, and motor shaft keys on the geared motor shaft, and the tested mechanism is fixed on the test bench base through the fixed sleeve of the tested mechanism;

A replaceable brake block is connected to the end of the flexible hinge enlargement mechanism. The base of the test bench is provided with a track-shaped through hole for adjusting the position of the slide bracket.

The method of using the high-frequency braking experimental device includes the following steps:

1) Adjust the ball screw slide table until the vertical distance between the flexible hinge amplifying mechanism and the brake disc is above 5cm, adjust the slide table support to the required experimental position, and adjust the ball screw slide table again until it is located in the flexible hinge amplifying mechanism The brake pad at the end is in contact with the brake disc;

2) Set the initial speed of the brake disc, the braking force, braking frequency, and braking force application method of high-frequency braking on the computer side. After the input is completed, the computer automatically generates the input signal settings;

3) After the experiment starts, the electromagnetic clutch is controlled by the computer through the controller;

4) The deceleration motor is controlled by the computer through the frequency converter, and the brake disc is accelerated to the specified speed through the electromagnetic clutch, and the pulse encoder feeds the speed signal back to the computer;

5) After the speed is stable, the electromagnetic clutch is controlled by the computer through the controller to separate the deceleration motor from the brake disc;

6) At the same time, the giant magnetostrictive driver is controlled by the computer through the linear power amplifier and signal generator, and generates actions according to the input braking parameters, and brakes the brake disc after being amplified by the flexible hinge displacement amplification mechanism;

7) During the braking process, the pulse encoder feeds the speed information back to the computer through the data acquisition card, and the digital oscilloscope displays the output waveform of the linear power amplifier in real time and feeds it back to the computer;

8) After the brake disc stops completely, the data recording is terminated, the giant magnetostrictive drive is controlled by the computer to stop the action through the linear power amplifier and the signal generator, and the braking process is terminated;

9) After the braking process is terminated, the deceleration motor stops working under the control of the computer through the frequency converter, and the experiment is completed.

The invention solves the problems of small braking displacement output, small braking force, slow system response, poor reliability and high cost caused by the use of piezoelectric ceramics as the driving element to provide braking force in the previous high-frequency braking experiment device. This high-frequency braking experimental device uses giant magnetostrictive material as the driving element to provide braking force, and cooperates with the flexible hinge displacement amplification mechanism to realize high output displacement, high output force, high reliability and low response of the high-frequency braking experimental device. Time and other characteristics; through the use of a special control system to control and detect the high-frequency braking test bench, the fast and easy adjustment of the braking force test parameters is realized, and the accuracy of the test data is guaranteed; by using two degrees of freedom adjustable settings, This makes the high-frequency braking experimental device have better adjustability. In addition, the high-frequency braking experiment device also has the characteristics of good versatility, easy operation, strong experiment repeatability, easy processing and assembly, material saving, and suitable for high-frequency braking experiment environment.

Description of drawings

Fig. 1 is the structural representation of high-frequency braking experimental device;

Fig. 2 is the structural representation of the high-frequency braking experimental device of another angle;

Figure 3 is an exploded view of the tested mechanism in the high-frequency braking experimental device;

Fig. 4 is the structural diagram of the control system of the high-frequency braking experimental device;

In the figure, the base of the test bench 1, the deceleration motor 2, the sliding table support 3, the horizontal adjustment screw group 4, the ball screw sliding table 5, the giant magnetostrictive driver bracket 6, the giant magnetostrictive driver 7, and the flexible hinge displacement amplification mechanism 8. Pulse encoder 9, pulse encoder bracket 10, brake disc 11, pulse encoder connecting frame 12, first round nut 13, second round nut 14, pressure ring 15, first tapered roller bearing 16, electromagnetic Clutch 17, main shaft 18, clutch connection key 19, coupling connection key 20, second tapered roller bearing 21, sleeve 22, brake disc fixing sleeve 23, third tapered roller bearing 24, third round nut 25 , elastic shaft coupling 26, reduction motor support 27, motor shaft key.

Detailed ways

As shown in Figures 1, 2, and 3, the high-frequency braking experimental device includes a test bench base 1, a sliding table bracket 3, a horizontal adjustment screw group 4, a ball screw sliding table 5, a giant magnetostrictive driver 7, and a flexible hinge displacement. Amplifying mechanism 8, pulse coder 9, pulse coder bracket 10, the mechanism under test, slide table bracket 3 is fixed on the base of the test bench 1 through horizontal adjustment screw group 4, ball screw slide table 5 is vertically fixed on the slide table bracket Above, the giant magnetostrictive driver 7 is vertically fixed on the ball screw slide table 5 through the giant magnetostrictive driver bracket 6, the flexible hinge displacement amplification mechanism 8 is fixed on the displacement output end of the giant magnetostrictive driver 7, and the pulse encoder The bracket 10 is fixed on the base 1 of the test bench, and the pulse encoder 9 is fixed on the pulse encoder bracket 10. The tested mechanism includes a geared motor 2, a brake disc 11, a pulse encoder connecting frame 12, a first round nut 13, a second Two round nuts 14, pressure ring 15, first tapered roller bearing 16, electromagnetic clutch 17, main shaft 18, clutch connection key 19, coupling connection key 20, second tapered roller bearing 21, sleeve 22, the subject Mechanism fixing sleeve 23, third tapered roller bearing 24, third round nut 25, elastic coupling 26, deceleration motor bracket 27, motor shaft key 28, pressure ring 15, brake disc 11, first tapered roller bearing 16. The electromagnetic clutch 17 is connected in sequence and fixed on the main shaft 18 through the first round nut 13 and the second round nut 14. The pulse encoder connecting frame 12 is bonded to the brake disc 11 and connected to the input shaft of the pulse encoder 9 , the main shaft 18 is fixed on the fixed sleeve 23 of the tested mechanism through the second tapered roller bearing 21, the sleeve 22, the third tapered roller bearing 24, and the third round nut 25. One end of the elastic coupling 26 is connected to the main shaft 18, and the elastic The other end of the coupling 26 is connected to the gear motor 2 shaft, the gear motor 2 is fixed on the test bench base 1 through the gear motor bracket 27, the main shaft 18 is provided with a clutch connection key 19, a coupling connection key 20, and the gear motor 2 shaft is There is a motor shaft key 28, and the tested mechanism is fixed on the base of the test bench through the fixed sleeve 23 of the tested mechanism;

A replaceable brake block is connected to the end of the flexible hinge enlargement mechanism 8 . The base 1 of the test bench is provided with a track-shaped through hole for adjusting the position of the slide bracket 3 .

As shown in Figure 4, the control method of the high-frequency braking experimental device:

1) The control system includes computer, frequency converter, geared motor, electromagnetic clutch, brake disc, pulse encoder, controller, signal generator, linear power amplifier, giant magnetostrictive driver, digital oscilloscope, data acquisition card, computer and Inverter, deceleration motor, electromagnetic clutch, brake disc, pulse encoder, and data acquisition card are connected in sequence to form a loop. The computer is connected to the controller and electromagnetic clutch in sequence. The computer is connected to the signal generator, linear power amplifier, and digital oscilloscope. Connected in sequence to form a loop, the computer is connected in sequence with the signal generator, linear power amplifier, and giant magnetostrictive driver;

2) The brake disc rotates under the control of the computer through the electromagnetic clutch, geared motor and frequency converter;

3) The electromagnetic clutch is combined and separated by computer control through the controller;

4) The pulse encoder feeds the rotational speed data back to the computer via the data acquisition card;

5) The giant magnetostrictive drive is controlled by a computer through a linear power amplifier and a signal generator;

6) The digital oscilloscope displays the output signal of the linear power amplifier in real time, and feeds the signal back to the computer;

The method of using the high-frequency braking experimental device includes the following steps:

1) Adjust the ball screw slide table 5 until the vertical distance between the flexible hinge amplification mechanism 8 and the brake disc 11 is more than 5cm, adjust the slide table support 3 to the required experimental position, and adjust the ball screw slide table 5 again until The brake block located at the end of the flexible hinge amplification mechanism 8 is in contact with the brake disc 11;

2) Set the initial speed of the brake disc 11 and the braking force, braking frequency, and braking force application method of high-frequency braking on the computer side. After the input is completed, the computer automatically generates the input signal settings;

3) After the experiment starts, the electromagnetic clutch is controlled by the computer through the controller;

4) The deceleration motor 2 is controlled by the computer through the frequency converter, drives the brake disc 11 to accelerate to the specified speed through the electromagnetic clutch 17, and the pulse encoder 9 feeds the speed signal back to the computer;

5) After the rotation speed is stable, the electromagnetic clutch 17 is controlled by the computer through the controller, so that the deceleration motor 2 and the brake disc 11 are driven and separated;

6) At the same time, the giant magnetostrictive driver 7 is controlled by the computer via a linear power amplifier and a signal generator, and generates actions according to the input braking parameters, and brakes the brake disc 11 after being amplified by the flexible hinge displacement amplification mechanism 8;

7) During the braking process, the pulse encoder 9 feeds the speed information back to the computer via the data acquisition card, and the digital oscilloscope displays the output waveform of the linear power amplifier in real time and feeds it back to the computer;

8) After the brake disc 11 stops completely, the data recording is terminated, the giant magnetostrictive driver is controlled by the computer to stop the action through the linear power amplifier and the signal generator, and the braking process is terminated;

9) After the braking process is terminated, the deceleration motor 2 stops working under the control of the computer through the frequency converter, and the experiment is completed.

Claims (4)

1. a high frequency is braked experimental provision, it is characterized in that comprising experiment table base (1), slide unit support (3), Level tune set screws (4), ball-screw slide unit (5), super-magnetostrictive drive (7), flexible hinge displacement enlarger (8), pulse encoder (9), pulse encoder support (10), tested mechanism, slide unit support (3) is fixed on the experiment table base (1) by Level tune set screws (4), ball-screw slide unit (5) vertically is fixed on the slide unit support, super-magnetostrictive drive (7) vertically is fixed on the ball-screw slide unit (5) by super-magnetostrictive drive support (6), flexible hinge displacement enlarger (8) is fixed on the displacement output terminal of super-magnetostrictive drive (7), pulse encoder support (10) is fixed on the experiment table base (1), pulse encoder (9) is fixed on the pulse encoder support (10), tested mechanism comprises reducing motor (2), brake disc (11), pulse encoder link (12), the first round nut (13), the second round nut (14), pressure ring (15), the first taper roll bearing (16), electromagnetic clutch (17), main shaft (18), clutch coupling connecting key (19), shaft coupling connecting key (20), the second taper roll bearing (21), sleeve (22), tested mechanism fixed cover (23), the 3rd taper roll bearing (24), the 3rd round nut (25), spring coupling (26), reducing motor support (27), motor axle key (28), pressure ring (15), brake disc (11), the first taper roll bearing (16), electromagnetic clutch (17), connect in turn and be fixed on the main shaft (18) by the first round nut (13) and the second round nut (14), pulse encoder link (12) is bonded in brake disc (11) and upward and with pulse encoder (9) input shaft links to each other, main shaft (18) is by the second taper roll bearing (21), sleeve (22), the 3rd taper roll bearing (24), the 3rd round nut (25) is fixed on the tested mechanism fixed cover (23), spring coupling (26) one ends connect main shaft (18), spring coupling (26) other end connects reducing motor (2) axle, reducing motor (2) is fixed on the experiment table base (1) by reducing motor support (27), main shaft (18) is provided with clutch coupling connecting key (19), shaft coupling connecting key (20), reducing motor (2) axle is provided with motor axle key (28), and tested mechanism is fixed on the experiment table base by tested mechanism fixed cover (23).

2. a kind of high frequency braking experimental provision as claimed in claim 1 is characterized in that described flexible hinge enlarger (8) end is connected with removable brake block.

3. a kind of high frequency braking experimental provision as claimed in claim 1 is characterized in that described experiment table base (1) is provided with for the racetrack through hole of regulating slide unit support (3) position.

4. using method of high frequency braking experimental provision as claimed in claim 1 is characterized in that may further comprise the steps:

1) adjustment roll ballscrew slide unit (5) until the vertical distance between flexible hinge enlarger (8) and the brake disc (11) more than 5cm, regulate slide unit support (3) to the experiment position that needs, adjustment roll ballscrew slide unit (5) is until be positioned at the terminal brake block of flexible hinge enlarger (8) and contact with brake disc (11) again;

2) damping force, braking frequency, the damping force that at computer terminal the initial speed of brake disc (11) and high frequency braking are set apply mode, and computing machine generated the input signal setting automatically after input was finished;

3) after the experiment beginning, electromagnetic clutch is subjected to the computer control adhesive via controller;

4) reducing motor (2) is subjected to computer control via frequency converter, drives brake disc (11) via electromagnetic clutch (17) and accelerates to the appointment rotating speed, and pulse encoder (9) returns speed feedback signal to computing machine;

5) after stabilization of speed, electromagnetic clutch (17) is subjected to computer control via controller, and transmission separates with brake disc (11) to make reducing motor (2);

6) super-magnetostrictive drive (7) is subjected to computer control via linear power amplifier, signal generator simultaneously, according to the brake parameters generation action of input, and after flexible hinge displacement enlarger (8) amplifies brake disc (11) is braked;

7) pulse encoder (9) feeds back to computing machine via data collecting card with rotary speed information in the braking procedure, and digital oscilloscope shows the output waveform of linear power amplifier in real time, and it is fed back to computing machine;

8) after brake disc (11) stopped fully, data recording stopped, and super-magnetostrictive drive is subjected to computer control to stop action via linear power amplifier, signal generator, and braking procedure stops;

9) after braking procedure stopped, reducing motor (2) was quit work by computer control via frequency converter, and experiment is finished.

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