Structure and control method of an automatic switch arc ignition test bench for continuous cutting of multiple wires

Abstract

This invention relates to an automatic circuit breaker arc-starting test bench structure for continuous cutting of multiple electrical wires. A drive servo motor and a worm gear reducer are mounted on a fixed support of the cutting bench. A lead screw is vertically connected to the worm gear reducer, and a lifting guillotine is connected to the lower end of the lead screw. The lifting guillotine slides up and down along guide posts on both sides of the fixed support. The lower end of the lifting guillotine is connected to a cutting blade via an insulated blade bracket. A cutting pad is mounted on the cutting bench, with wire clamps and terminals at both ends. The electrical wire to be cut is placed on the cutting pad and secured with the wire clamps. Both ends of the electrical wire are connected to the terminals. The cutting blade is connected to a blade power terminal on the cutting bench. This invention achieves the cutting effect required for circuit breaker arc-starting tests, enabling continuous and automatic cutting of electrical wires, saving labor costs, and improving cutting efficiency. It can also independently cut multiple test wires of different specifications and has a wide range of applications.

Description

Technical Field

[0001] This invention belongs to the field of power cable testing technology, specifically relating to the structure and control method of an automatic switch arc-starting test bench for continuous cutting of multiple wires. Background Technology

[0002] In the arc ignition test of a switch, the insulation of the wire must be cut so that the switch blade makes point contact with the conductor of the wire to generate an electric arc. Currently, in the general test standard for switch cutting arc ignition test, the switch cutting arc ignition device only cuts the cable once to ignite the arc, and then the cable and switch blade need to be replaced. Although the structure is simple, the preparation work for the test operation is relatively cumbersome and time-consuming. Moreover, the cutting process is completely manually controlled. In some specific environments, such as low-pressure environments or high and low temperature environments, multiple tests need to be conducted in an environmental chamber after one test preparation. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic guillotine arc ignition test bench structure and control method for continuous cutting of multiple wires. All mechanical components are installed as a whole, can be moved at will, are small in size, flexible in use, and are fully automatic. It can be used for testing under normal temperature and pressure, and is more suitable for continuous guillotine arc ignition tests in an environmental chamber.

[0004] The technical problem solved by this invention is achieved through the following technical solution:

[0005] An automatic switch arc-starting test bench structure for continuous cutting of multiple wires is characterized by: a cutting table, on which a fixed bracket is mounted; a drive servo motor and a worm gear reducer are supported by a horizontal plate on the fixed bracket; the drive servo motor is connected to the worm gear reducer; a lead screw is vertically connected to the worm gear reducer; a lifting guillotine is connected to the lower end of the lead screw; the lifting guillotine slides up and down along guide posts on both sides of the fixed bracket; a cutting blade is connected to the lower end of the lifting guillotine via an insulating blade bracket; a cutting pad is mounted on the cutting table; wire fixing clips and terminals are provided at both ends of the cutting pad; the wires to be cut are placed on the cutting pad and fixed with the wire fixing clips; both ends of the wires to be cut are connected to the terminals; a blade power terminal is provided on the cutting table; the cutting blade is connected to the blade power terminal; and an external power and signal connector is provided on the side of the cutting table.

[0006] Furthermore, there are several cutting pads arranged side by side on the surface of the cutting table, and each cutting pad is connected to a miniature slide on both sides, which is slidably installed inside the cutting table.

[0007] Furthermore, the fixed bracket is equipped with a working status indicator light.

[0008] Furthermore, a stroke laser sensor is installed on the lifting guillotine platform.

[0009] Furthermore, the cutting table is equipped with mounting feet at all four corners.

[0010] A control method for an automatic switch arc-initiating test bench structure for continuous cutting of multiple electrical wires, characterized in that: the steps of the method are as follows:

[0011] 1. Guillotine cutting position setting:

[0012] In the control program, raise the guillotine to the set cutting position, and click the "Position Setting" button on the operation screen. The program will then remember this travel distance as the stop position.

[0013] 2. Replace the cutting blade:

[0014] The cutting blade is connected to the cutting table via an insulated blade holder and secured with screws. The blade is connected to the blade power terminal. To replace the blade, use a wrench to loosen the fixing screws and remove the old blade.

[0015] 3. Install the cut wires:

[0016] The wires to be cut are secured to the liftable cutting pad in sequence with wire clamps to keep the wires straight, and the two ends of the wires are connected to the test power supply through terminals;

[0017] 4. Cutting pad rising and falling

[0018] The cutting table contains eight liftable cutting pads. The lifting of the cutting pads is controlled by miniature slides installed at both ends, which are suitable for high and low temperature and low air pressure environments. When a cutting pad is selected, the miniature slides at both ends rise to lift the pad, and the cutting will not affect the wires on other pads. When not selected, the miniature slides descend to drop the pad.

[0019] 5. Cutting test

[0020] 1) Fix the wire to be cut onto the cutting pad at once, and connect the wire to the terminal block on the table to connect to the test power supply; ensure that the blade is in good condition corresponding to the position of the wire;

[0021] 2) In the control program, fill in the wire gauge X and cutting depth H of each wire on the cutting pad. The program will automatically look up the wire diameter D from the relevant standard based on the wire gauge. Based on the found diameter D and the filled cutting depth H, with the cutting pad plane height as H0, the program will automatically calculate the cutting stop position H1. Up to 8 wires of different specifications can be arranged.

[0022] Cutting stop height H1 = H0 + DH

[0023] 3) The laser beam of the stroke laser sensor is projected onto the table cutting table. The stroke laser sensor is fixed on the lifting guillotine. When the blade starts to move, the blade holder moves with the lifting guide column through the lifting guide column. The control program monitors and calculates the required moving distance and the current moving speed V in real time through the distance feedback of the stroke sensor.

[0024] 4) When the control program starts the guillotine test, it drives the servo motor to rotate at the set speed, and drives the lead screw to rotate through the worm gear reducer, thereby moving the lifting guillotine platform downward, and the blade moves downward to cut the wire being cut;

[0025] 5) During the guillotine cutting operation, the control program simultaneously reads the value Hj from the stroke laser sensor, calculates the difference H' (H' = Hj - H1) between the current blade position and the stop position in real time, and determines whether the stop position has been reached (i.e., H' ≤ 0). If the cutting position has been reached, the cutting action is stopped, and the program sends stop status feedback and current position feedback to the main test program.

[0026] The advantages and beneficial effects of this invention are as follows:

[0027] 1. This invention can achieve the cutting effect of the switch arc ignition test, and can complete the continuous and automatic cutting of wires, saving labor costs and improving cutting efficiency.

[0028] 2. The present invention comprises several cutting pads arranged side by side on the surface of the cutting table. Each cutting pad is connected to a miniature slide on both sides. The miniature slides are slidably installed inside the cutting table, enabling the independent cutting of multiple test wires. Furthermore, the wires on the various cutting pads have different specifications, making it widely applicable.

[0029] 3. The fixed bracket of this invention is equipped with a working status indicator light, which makes it easy for staff to understand the working status of the test bench in a timely manner, avoids dangers such as failure to detect faults in a timely manner, and ensures the accuracy and safety of the test.

[0030] 4. The lifting guillotine platform of the present invention is equipped with a stroke laser sensor. The stroke laser sensor senses the real-time cutting depth of the cutting blade in a timely manner and provides feedback based on the maximum cutting depth and the real-time cutting depth. This facilitates timely work feedback and parameter adjustment by the test control main program, resulting in a high degree of automation.

[0031] 5. The cutting table of the present invention is provided with mounting feet at all four corners to enhance the stability of the cutting table and ensure the stable operation of the cutting blade.

[0032] 6. After preparing multiple test wires and cutting blades at once, this invention performs continuous and automatic cutting and arc ignition in high and low temperature and low air pressure environments, and provides real-time feedback of progress and parameters to the test control main program. The cutting depth is automatically controlled by the computer, which is more precise and stable than manual control. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the present invention;

[0034] Figure 2 This is another structural schematic diagram of the present invention;

[0035] Figure 3 This is a schematic diagram showing the connection between the cutting pad and the miniature slide of the present invention;

[0036] Figure 4 This is a flowchart of the process of the present invention.

[0037] 1-Cutting table; 2-Terminal; 3-Cutting pad; 4-Wire clamp; 5-Drive servo motor; 6-Worm gear reducer; 7-Lead screw; 8-Lifting guide column; 9-Insulated blade holder; 10-Cutting blade; 11-Fixed bracket; 12-Working status indicator light; 13-Blade power connection terminal; 14-External power and signal connector; 15-Wire to be cut; 16-Stroke laser sensor; 17-Mounting feet; 18-Lifting guillotine; 19-Miniature slide; 20-Horizontal plate. Detailed Implementation

[0038] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0039] An innovative structure for an automatic switch arc-initiating test bench for continuous cutting of multiple wires includes a cutting table 1. A fixed support 11 is mounted on the cutting table 1. A drive servo motor 5 and a worm gear reducer 6 are supported on the fixed support 11 via a horizontal plate 20. The drive servo motor 5 is connected to the worm gear reducer 6. A lead screw 7 is vertically connected to the worm gear reducer 6. A lifting guillotine platform 18 is connected to the lower end of the lead screw 7. The lifting guillotine platform 18 slides up and down along guide posts 8 on both sides of the fixed support 11. The lower end of the lifting guillotine 18 is connected to the cutting blade 10 via an insulating blade bracket 9; a cutting pad 3 is provided on the cutting table 1, and wire fixing clips 4 and terminals 2 are provided at both ends of the cutting pad 3. The wire to be cut 15 is placed on the cutting pad 3 and fixed with the wire fixing clips 4. The two ends of the wire to be cut 15 are connected to the terminals 2. A blade power terminal 13 is provided on the cutting table 1, and the cutting blade 10 is connected to the blade power terminal 13. An external power and signal connector 14 is provided on the side of the cutting table 1.

[0040] This invention can achieve the cutting effect of the switch arc ignition test, and can complete the continuous and automatic cutting of wires, saving labor costs and improving cutting efficiency.

[0041] There are several cutting pads 3 arranged side by side on the surface of the cutting table 1. Each cutting pad 3 has a miniature slide 19 connected to both sides. The miniature slide 19 is slidably installed inside the cutting table 1, which can realize the independent cutting of multiple test wires. The wires on the several cutting pads have different specifications, and the applicability is wide.

[0042] The fixed bracket 11 is equipped with a working status indicator light 12, which makes it easy for staff to understand the working status of the test bench in a timely manner, avoid dangers such as failure to detect faults in time, and ensure the accuracy and safety of the test.

[0043] The lifting guillotine 18 is equipped with a stroke laser sensor 16, which senses the real-time cutting depth of the cutting blade and provides feedback based on the maximum cutting depth and the real-time cutting depth. This allows the main program of the test control to make timely work feedback and parameter adjustments, resulting in a high degree of automation.

[0044] The cutting table 1 is equipped with mounting feet 17 at all four corners to enhance the stability of the cutting table and ensure the stable operation of the cutting blade.

[0045] The working process of an automatic switch arc-starting test bench structure for continuous cutting of multiple wires is as follows:

[0046] A multi-color indicator light is installed on the top of the device to indicate whether the test power supply is connected. When the operator issues a test preparation command on the computer, the guillotine will rise to the stop position and the position will be fed back to the main test program. The main program will cut off the external test power supply to the guillotine table, and the indicator light (12) will show green, indicating that test preparation can begin. After the test preparation is completed, the operator issues a preparation completion command, and the indicator light (12) will show yellow and flash. When cutting is in progress, the indicator light (12) will show red and flash.

[0047] 1. Guillotine cutting position setting:

[0048] In the control program, raise the guillotine to the set cutting position, and click the "Position Setting" button on the operation screen. The program will then remember this travel distance as the stop position.

[0049] 2. Replace the cutting blade:

[0050] The cutting blade 10 is connected to the cutting table via the insulated blade bracket 9 and is fixed with screws. The blade is connected to the blade power terminal 13. To replace the blade, use a wrench to loosen the fixing screws and remove the old blade.

[0051] 3. Install the cut wires:

[0052] The wires 15 to be cut are secured to the liftable cutting pad with wire clamps 4 in sequence to keep the wires straight. The two ends of the wires are connected to the test power supply through terminals 2.

[0053] 4. Cutting pad rising and falling

[0054] The cutting table contains eight liftable cutting pads. The lifting of the cutting pads is controlled by miniature slides installed at both ends, which are suitable for high and low temperature and low air pressure environments. When a cutting pad is selected, the miniature slides at both ends rise and lift the pad. When cutting, it will not affect the wires on other pads. When not selected, the miniature slides descend and drop the pad.

[0055] 5. Cutting test

[0056] 1) Fix the wire to be cut onto the cutting pad 3 at once, and connect the wire to the terminal 2 on the table to connect to the test power supply; and ensure that the blade is in good condition corresponding to the position of the wire.

[0057] 2) In the control program, fill in the wire gauge X and cutting depth H of the wire on each cutting pad 3. The program will automatically look up the wire diameter D according to the relevant standard based on the wire gauge. Based on the found diameter D and the filled cutting depth H, with the plane height of the cutting pad 3 as H0, the program will automatically calculate the cutting stop position H1. Eight wires of different specifications can be arranged.

[0058] Cutting stop height H1 = H0 + DH

[0059] 3) The laser beam of the stroke laser sensor 16 is projected onto the table cutting table 1. The stroke laser sensor is fixed on the lifting guillotine table 18. When the blade starts to move, the blade holder moves with the lifting column through the lifting guide column and the guide column 8. The control program monitors and calculates the required moving distance and the current moving speed V in real time through the distance feedback of the stroke sensor.

[0060] 4) When the control program starts the guillotine test, it drives the servo motor 5 to rotate at the set speed, and drives the lead screw 7 to rotate through the worm gear reducer 6, thereby moving the lifting guillotine 18 downward, and the blade moves downward to cut the wire 15.

[0061] 5) During the guillotine cutting operation, the control program simultaneously reads the value Hj of the stroke laser sensor 16, calculates the difference H' (H' = Hj - H1) between the current blade position and the stop position in real time, and determines whether the stop position has been reached (H' ≤ 0). If the cutting position has been reached, the cutting action is stopped, and the stop status feedback and current position feedback are sent to the main test program.

[0062] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A structure for an automatic switch arc-starting test bench for continuous cutting of multiple wires, characterized in that: The system includes a cutting table (1), on which a fixed bracket (11) is provided. A drive servo motor (5) and a worm gear reducer (6) are supported on the fixed bracket (11) by a horizontal plate (20). The drive servo motor (5) is connected to the worm gear reducer (6). A lead screw (7) is vertically connected to the worm gear reducer (6). A lifting guillotine (18) is connected to the lower end of the lead screw (7). The lifting guillotine (18) slides up and down along the guide posts (8) provided on both sides of the fixed bracket (11). The lower end of the lifting guillotine (18) is connected to an insulating blade bracket (9). The cutting table (1) is equipped with a cutting pad (3), and the two ends of the cutting pad (3) are equipped with wire fixing clips (4) and terminals (2). The wire to be cut (15) is placed on the cutting pad (3) and fixed with the wire fixing clips (4). The two ends of the wire to be cut (15) are connected to the terminals (2). The cutting table (1) is equipped with a blade power terminal (13), and the cutting blade (10) is connected to the blade power terminal (13). The side of the cutting table (1) is equipped with an external power supply and signal connector (14). The number of cutting pads (3) is several, and they are arranged side by side on the surface of the cutting table (1). Both sides of the cutting pads (3) are connected to miniature slides (19). The miniature slides (19) are slidably installed on the inside of the cutting table (1), which can realize the independent cutting of multiple test wires. The wires on the cutting pads are of different specifications, and the application range is wide.

2. The automatic switch arc-starting test bench structure for continuous cutting of multiple wires according to claim 1, characterized in that: The fixed bracket (11) is equipped with a working status indicator light (12).

3. The automatic switch arc-starting test bench structure for continuous cutting of multiple wires according to claim 1, characterized in that: A stroke laser sensor (16) is installed on the lifting guillotine platform (18).

4. The automatic switch arc-starting test bench structure for continuous cutting of multiple wires according to claim 1, characterized in that: The cutting table (1) is provided with mounting feet (17) at all four corners.

5. A control method for an automatic switch arc-starting test bench structure for continuous cutting of multiple wires as described in any one of claims 1 to 4, characterized in that: The steps of the method are as follows:

1. Guillotine cutting position setting: In the control program, raise the guillotine to the set cutting position, and click the "Position Setting" button on the operation screen. The program will then remember this travel distance as the stop position.

2. Replace the cutting blade: The cutting blade (10) is connected to the cutting table via an insulated blade holder (9) and fixed with screws. The blade is connected to the blade power terminal (13). To replace the blade, use a wrench to loosen the fixing screws and remove the old blade.

3. Install the cut wires: The wires to be cut (15) are fastened to the liftable cutting pad in sequence with wire clamps (4) to keep the wires straight. The two ends of the wires are connected to the test power supply through terminals (2).

4. Cutting pad rising and falling The cutting table contains eight liftable cutting pads. The lifting of the cutting pads is controlled by miniature slides installed at both ends, which are suitable for high and low temperature and low air pressure environments. When a cutting pad is selected, the miniature slides at both ends rise to lift the pad, and the cutting will not affect the wires on other pads. When not selected, the miniature slides descend to drop the pad.

5. Cutting test 1) Fix the wire to be cut onto the cutting pad (3) at once, and connect the wire to the terminal block (2) on the table to connect to the test power supply; and ensure that the blade is in good condition corresponding to the position of the wire; 2) Fill in the wire gauge X and cutting depth H of each wire on the cutting pad (3) in the control program. The program automatically queries the wire diameter D according to the relevant standard based on the wire gauge. Based on the found diameter D and the filled cutting depth H, the cutting stop position H1 is automatically calculated with the plane height of the cutting pad (3) as H0. Eight wires of different specifications can be arranged. Cutting stop height H1 = H0 + DH; 3) The laser beam of the stroke laser sensor (16) is projected onto the table cutting table (1). The stroke laser sensor is fixed on the lifting guillotine table (18). When the blade starts to move, the blade holder moves with the lifting column through the lifting guide column and the guide column (8). The control program monitors and calculates the required moving distance and the current moving speed V in real time through the distance feedback of the stroke sensor. 4) When the control program starts the guillotine test, it drives the servo motor (5) to rotate at the set speed, and drives the lead screw (7) to rotate through the worm gear reducer (6), thereby moving the lifting guillotine platform (18) downward, and the blade moves downward to cut the wire (15) being cut; 5) During the guillotine cutting operation, the control program simultaneously reads the value Hj of the stroke laser sensor (16), calculates the difference H' (H'=Hj-H1) between the current blade position and the stop position in real time, and determines whether the stop position has been reached, i.e. H'≤0. If the cutting position is reached, the cutting action is stopped, and the stop status feedback and current position feedback are sent to the main test program.

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