CN109732182B - Arcing feedback system of numerical control straight bar plasma cutting machine - Google Patents
Arcing feedback system of numerical control straight bar plasma cutting machine Download PDFInfo
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Abstract
The invention provides an arcing feedback system of a numerical control straight bar plasma cutting machine, which comprises relays KA1, KA2, KA3, KA4, KA5, KA6, starting switches SB1, SB2 and SB3, a feedback relay normally open contact OK1 of a first plasma power supply, a feedback relay normally open contact OK2 of a second plasma power supply, a feedback relay normally open contact OK3 of a third plasma power supply, an emergency stop switch SB0, a system controller U41, an X-axis servo controller U42, a Y-axis servo controller U43 and relays KA11 and KA12; the invention can control two or three plasma cutting torches to cut simultaneously, and monitor whether the plasma cutting torches in the simultaneous cutting work normally in real time; greatly improves the cutting speed.
Description
Technical Field
The invention relates to a plasma cutting machine, in particular to an arcing feedback system of a numerical control plasma cutting machine, which can cut by using a plurality of plasma cutting torches at the same time.
Background
The plasma cutting machine has the greatest advantage over the flame cutting machine in that the cutting temperature is much higher, and materials which are difficult to cut by flame, such as stainless steel, can be cut. The plasma cutting machine can cut by computer programming and underwater, so that the cutting is accurate, the burning loss is small, the plasma cutting machine is suitable for cutting a plate, the material can be saved greatly, and the plasma cutting machine has great superiority compared with flame cutting.
The numerical control plasma cutting machine mainly aims at cutting thin plates, can be used for cutting metals with the diameter of less than 20mm, has a cutting range wider than that of a numerical control flame cutting machine, can cut metals such as stainless steel, copper, aluminum and the like, and has a processing speed faster than that of flame cutting.
In order to further increase the plasma cutting speed, a mode of simultaneously cutting by a plurality of plasma cutting torches can be adopted, but the plurality of plasma cutting torches need to be monitored in real time to simultaneously work normally. If a certain plasma cutting torch works abnormally and does not work normally, reworking can be caused, and cutting efficiency is affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an arcing feedback system of a numerical control straight plasma cutting machine, which can control and monitor the work of a plurality of plasma cutting torches in real time when the numerical control straight plasma cutting machine is provided with the plurality of plasma cutting torches. The technical scheme adopted by the invention is as follows:
an arcing feedback system of a numerical control straight bar plasma cutting machine comprises relays KA1, KA2, KA3, KA4, KA5 and KA6, starting switches SB1, SB2 and SB3, a feedback relay normally open contact OK1 of a first plasma power supply, a feedback relay normally open contact OK2 of a second plasma power supply, a feedback relay normally open contact OK3 of a third plasma power supply, an emergency stop switch SB0, a system controller U41, an X-axis servo controller U42, a Y-axis servo controller U43 and relays KA11 and KA12;
the starting switches SB1, SB2 and SB3 are normally open switches, and the scram switch SB0 is normally closed switches;
a series branch after the coil of the relay KA1 and the starting switch SB1 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA2 coil and the starting switch SB2 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA3 coil and the starting switch SB3 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA4 coil and the feedback relay normally open contact OK1 of the first plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA5 coil and a feedback relay normally open contact OK2 of the second plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA6 coil and a feedback relay normally open contact OK3 of the third plasma power supply are connected in series is respectively connected with positive voltage VCC and 0v at two ends;
the emergency stop switch SB0, the normally open contact KA12-1 of the relay KA12 and the normally open contact KA11-1 of the relay KA11 are connected in series to form a serial branch, one end of the serial branch is connected with 0v, and the other end of the serial branch is connected with one input control end of the system controller U41;
the other input control end of the system controller U41 is connected with one end of a normally closed contact KA1-3 of the relay KA1 and one end of a normally open contact KA4-1 of the relay KA 4; the other end of the normally-closed contact KA1-3 of the relay KA1 and the other end of the normally-open contact KA4-1 of the relay KA4 are connected with one end of the normally-closed contact KA2-3 of the relay KA2 and one end of the normally-open contact KA5-1 of the relay KA 5; the other end of the normally-closed contact KA2-3 of the relay KA2 and the other end of the normally-open contact KA5-1 of the relay KA5 are connected with one end of the normally-closed contact KA3-3 of the relay KA3 and one end of the normally-open contact KA6-1 of the relay KA6, and the other end of the normally-closed contact KA3-3 of the relay KA3 and the other end of the normally-open contact KA6-1 of the relay KA6 are connected with 0v;
the X-axis servo driving end of the system controller U41 is connected with the X-axis servo controller U42, the alarm end of the X-axis servo controller U42 is connected with one end of a coil of the relay KA11, and the other end of the coil of the relay KA11 is connected with the positive voltage VCC;
the Y-axis servo driving end of the system controller U41 is connected with the Y-axis servo controller U43, the alarm end of the Y-axis servo controller U43 is connected with one end of the coil of the relay KA12, and the other end of the coil of the relay KA12 is connected with the positive voltage VCC.
Further, the arcing feedback system of the numerical control straight strip plasma cutting machine further comprises indicator lamps L1, L2 and L3;
the pilot lamp L1 connects in parallel at relay KA4 coil both ends, and pilot lamp L2 connects in parallel at relay KA5 coil both ends, and pilot lamp L3 connects in parallel at relay KA6 coil both ends.
The invention also provides an arcing feedback system of the numerical control straight bar plasma cutting machine, which comprises relays KA1, KA2, KA4 and KA5, starting switches SB1 and SB2, a feedback relay normally open contact OK1 of a first plasma power supply, a feedback relay normally open contact OK2 of a second plasma power supply, an emergency stop switch SB0, a system controller U41, an X-axis servo controller U42, a Y-axis servo controller U43 and relays KA11 and KA12;
the starting switches SB1 and SB2 are normally open switches; the emergency stop switch SB0 adopts a normally closed switch;
a series branch after the coil of the relay KA1 and the starting switch SB1 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA2 coil and the starting switch SB2 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA4 coil and the feedback relay normally open contact OK1 of the first plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA5 coil and a feedback relay normally open contact OK2 of the second plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
the emergency stop switch SB0, the normally open contact KA12-1 of the relay KA12 and the normally open contact KA11-1 of the relay KA11 are connected in series to form a serial branch, one end of the serial branch is connected with 0v, and the other end of the serial branch is connected with one input control end of the system controller U41;
the other input control end of the system controller U41 is connected with one end of a normally closed contact KA1-3 of the relay KA1 and one end of a normally open contact KA4-1 of the relay KA 4; the other end of the normally-closed contact KA1-3 of the relay KA1 and the other end of the normally-open contact KA4-1 of the relay KA4 are connected with one end of the normally-closed contact KA2-3 of the relay KA2 and one end of the normally-open contact KA5-1 of the relay KA 5; the other end of the normally closed contact KA2-3 of the relay KA2 and the other end of the normally open contact KA5-1 of the relay KA5 are connected with 0v;
the X-axis servo driving end of the system controller U41 is connected with the X-axis servo controller U42, the alarm end of the X-axis servo controller U42 is connected with one end of a coil of the relay KA11, and the other end of the coil of the relay KA11 is connected with the positive voltage VCC;
the Y-axis servo driving end of the system controller U41 is connected with the Y-axis servo controller U43, the alarm end of the Y-axis servo controller U43 is connected with one end of the coil of the relay KA12, and the other end of the coil of the relay KA12 is connected with the positive voltage VCC.
Further, the arcing feedback system of the numerical control straight strip plasma cutting machine further comprises indicator lamps L1 and L2;
the pilot lamp L1 connects in parallel at relay KA4 coil both ends, and the pilot lamp L2 connects in parallel at relay KA5 coil both ends.
The invention has the advantages that: the invention can control two or three plasma cutting torches to cut simultaneously, and monitor whether the plasma cutting torches in the simultaneous cutting work normally in real time; the cutting speed is greatly improved, and the plasma cutting speed of the invention is 5-6 times of the cutting speed of a common flame cutting machine.
Drawings
FIG. 1 is a schematic diagram of the power supply, start-up and feedback monitoring portion of the present invention.
Fig. 2 is a schematic diagram of a portion of an automatic arc voltage adjustment height controller for a first plasma torch of the present invention.
Fig. 3 is a schematic diagram of a portion of an arc voltage automatic height adjustment controller for a second plasma torch of the present invention.
Fig. 4 is a schematic diagram of a portion of an automatic arc voltage adjustment height controller for a third plasma torch according to the present invention.
Fig. 5 is a schematic diagram of a portion of a system controller according to the present invention.
Fig. 6 is a schematic view of cutting a steel plate according to the present invention.
Detailed Description
The invention will be further described with reference to the following specific drawings and examples.
Embodiment one.
The invention provides an arcing feedback system (hereinafter referred to as an arcing feedback system) of a numerical control straight bar plasma cutting machine, which comprises relays KA1, KA2, KA3, KA4, KA5, KA6, starting switches SB1, SB2 and SB3, a feedback relay normally open contact OK1 of a first plasma power supply, a feedback relay normally open contact OK2 of a second plasma power supply, a feedback relay normally open contact OK3 of a third plasma power supply, an emergency stop switch SB0, a system controller U41, an X-axis servo controller U42, a Y-axis servo controller U43 and relays KA11 and KA12; indicator lights L1, L2, L3 may also be included;
the starting switches SB1, SB2 and SB3 are normally open switches, such as button switches with self-locking function; the emergency stop switch SB0 adopts a normally closed switch;
the numerical control straight strip plasma cutting machine is provided with a control system, and the arcing feedback system provided by the invention is a part of the control system; in the embodiment, three plasma cutting torches are arranged on the numerical control straight plasma cutting machine, and correspondingly, three plasma power supplies are arranged;
in the control system, a positive voltage VCC of 24v is provided through a power module U1;
a series branch after the coil of the relay KA1 and the starting switch SB1 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA2 coil and the starting switch SB2 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA3 coil and the starting switch SB3 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA4 coil and the feedback relay normally open contact OK1 of the first plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA5 coil and a feedback relay normally open contact OK2 of the second plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA6 coil and a feedback relay normally open contact OK3 of the third plasma power supply are connected in series is respectively connected with positive voltage VCC and 0v at two ends;
the indicator lamp L1 is connected in parallel with the two ends of the coil of the relay KA4, the indicator lamp L2 is connected in parallel with the two ends of the coil of the relay KA5, and the indicator lamp L3 is connected in parallel with the two ends of the coil of the relay KA 6;
the emergency stop switch SB0, the normally open contact KA12-1 of the relay KA12 and the normally open contact KA11-1 of the relay KA11 are connected in series to form a serial branch, one end of the serial branch is connected with 0v, and the other end of the serial branch is connected with one input control end of the system controller U41;
the other input control end of the system controller U41 is connected with one end of a normally closed contact KA1-3 of the relay KA1 and one end of a normally open contact KA4-1 of the relay KA 4; the other end of the normally-closed contact KA1-3 of the relay KA1 and the other end of the normally-open contact KA4-1 of the relay KA4 are connected with one end of the normally-closed contact KA2-3 of the relay KA2 and one end of the normally-open contact KA5-1 of the relay KA 5; the other end of the normally-closed contact KA2-3 of the relay KA2 and the other end of the normally-open contact KA5-1 of the relay KA5 are connected with one end of the normally-closed contact KA3-3 of the relay KA3 and one end of the normally-open contact KA6-1 of the relay KA6, and the other end of the normally-closed contact KA3-3 of the relay KA3 and the other end of the normally-open contact KA6-1 of the relay KA6 are connected with 0v;
the X-axis servo driving end of the system controller U41 is connected with the X-axis servo controller U42, the alarm end of the X-axis servo controller U42 is connected with one end of a coil of the relay KA11, and the other end of the coil of the relay KA11 is connected with the positive voltage VCC; the X-axis servo controller U42 is used for driving the X-axis servo motor M41;
the Y-axis servo driving end of the system controller U41 is connected with the Y-axis servo controller U43, the alarm end of the Y-axis servo controller U43 is connected with one end of a coil of the relay KA12, and the other end of the coil of the relay KA12 is connected with the positive voltage VCC; the Y-axis servo controller U43 is used for driving the Y-axis servo motor M42;
the X-axis servo motor M41 and the Y-axis servo motor M42 can drive three plasma cutting torches to move in the X-axis direction or the Y-axis direction in the horizontal direction at the same time;
in the control system, four output control ends of a system controller U41 are respectively connected with one end of a relay KA7 coil, one end of a relay KA8 coil, one end of a relay KA9 coil and one end of a relay KA10 coil; the other end of the relay KA7 coil, the other end of the relay KA8 coil, the other end of the relay KA9 coil and the other end of the relay KA10 coil are all connected with positive voltage VCC; the four output control ends of the system controller U41 respectively output an automatic on/off signal for regulating the arc voltage of the plasma cutting torch, an arc starting on/off signal of the plasma cutting torch, an ascending on/off signal of the plasma cutting torch and a descending on/off signal of the plasma cutting torch;
in the control system, the automatic arc voltage adjusting height controller U11 of the first plasma cutting torch, the automatic arc voltage adjusting height controller U21 of the second plasma cutting torch and the automatic arc voltage adjusting height controller U31 of the third plasma cutting torch are included, as shown in fig. 2, 3 and 4 respectively;
the ground end of the arc voltage automatic regulating height controller U11 is connected with 0V through a normally open contact KA1-1 of a relay KA1, and the power supply end is connected with a V positive voltage VCC through a normally open contact KA1-2 of the relay KA 1;
the input end IN1 of the automatic arc voltage regulating height controller U11 is connected with one end of a normally open contact KA7-1 of the relay KA7, the input end IN2 is connected with one end of a normally open contact KA9-1 of the relay KA9, the input end IN3 is connected with one end of a normally open contact KA10-1 of the relay KA10, the input end IN4 is connected with one end of a normally open contact KA8-1 of the relay KA8, the other end of the normally open contact KA7-1 of the relay KA7, the other end of the normally open contact KA9-1 of the relay KA9, the other end of a normally open contact KA10-1 of the relay KA10 and the other end of a normally open contact KA8-1 of the relay KA8 are connected with a first public end COM1 of the automatic arc voltage regulating height controller U11;
the two driving ends O1 and O2 of the arc voltage automatic height adjusting controller U11 are connected with the lifting motor M1; one end of the lower limit switch SQ1 is connected with the input end IN5 of the U11, one end of the upper limit switch SQ2 is connected with the input end IN6 of the U11, and the other ends of the lower limit switch SQ1 and the upper limit switch SQ2 are connected with the limit public end COM2 of the U11;
the two arcing signal output ends O3 and O4 of the automatic arc voltage regulating height controller U11 are used for connecting a first plasma power supply, sending plasma cutting arcing on/off signals to the first plasma power supply, and the plasma power supply is not shown in the figure; the output ends O3 and O4 of the arcing signals are closed, the plasma power supply is started, the output ends O3 and O4 are disconnected, and the plasma power supply is started and closed;
the two voltage monitoring ends IN7 and IN8 of the automatic arc voltage regulating height controller U11 are connected with the arc voltage output of the plasma power supply through a voltage dividing module U12; the voltage dividing module U12 is used for dividing voltage in a linear proportion of 100:1, and has a linear voltage reduction function, and the arc voltage output of the plasma power supply is initially set to be 135v;
the peripheral circuits of the arc voltage automatic height adjustment controller U21 of the second plasma cutting torch and the arc voltage automatic height adjustment controller U31 of the third plasma cutting torch are the same as the arc voltage automatic height adjustment controller U11 of the first plasma cutting torch, and are not repeated;
the motors M1, M2 and M3 are respectively used for driving the first, second and third plasma cutting torches to lift; the plasma cutting torch is arranged on the lifting mechanism body and driven by a motor; when plasma cutting is carried out, the height of a cutting nozzle of the plasma cutting torch from a cutting workpiece is about 2 mm-4 mm;
as shown in fig. 6, three plasma torches in the present invention can cut, and for a steel plate a having a width of 2m, four steel plates having a width of 0.5m can be cut at one time according to three broken lines in fig. 6; the spacing between the three plasma cutting torches is adjusted to be 0.5m before cutting;
when the starting switches SB1, SB2 and SB3 are pressed, the coils of the relays KA1, KA2 and KA3 are powered on, normally open contacts KA1-1 and KA1-2 of the relay KA1 are closed, normally open contacts KA2-1 and KA2-2 of the relay KA2 are closed, normally open contacts KA3-1 and KA3-2 of the relay KA3 are closed, an automatic arc voltage regulating height controller U11 of the first plasma cutting torch, an automatic arc voltage regulating height controller U21 of the second plasma cutting torch and an automatic arc voltage regulating height controller U31 of the third plasma cutting torch are powered on;
after the distance between the plasma cutting torches is set, if the automatic height adjusting mode of the plasma cutting torches is adopted, the system controller U41 sends an automatic opening signal for adjusting the arc voltage of the plasma cutting torches, so that a coil of the relay KA7 is electrified, a normally open contact KA7-1 of the relay KA7 is closed, a normally open contact KA7-2 of the relay KA7 is closed, a normally open contact KA7-3 of the relay KA7 is closed, and input ends IN1 of the automatic arc voltage adjusting height controllers U11, U21 and U31 are all closed signals; the arc voltage automatic height adjusting controllers U11, U21 and U31 are in an automatic plasma cutting torch height adjusting mode;
the system controller U41 sends out an arc starting signal of the plasma cutting torch, so that a coil of the relay KA8 is electrified, normally open contacts KA8-1, KA8-2 and KA8-3 of the relay KA8 are closed, input ends IN4 of the arc voltage automatic height adjusting controllers U11, U21 and U31 are all closed signals, and arc voltage automatic height adjusting controllers U11, U21 and U31 send out the arc starting signal of the plasma cutting torch to corresponding plasma power supplies through arc starting signal output ends O3 and O4; at this time, three plasma power supplies corresponding to the three arc voltage automatic height adjustment controllers U11, U21, U31 output arc voltages according to default settings;
the arc voltage automatic regulating height controllers U11, U21 and U31 monitor the arc voltage output of the corresponding plasma power supply; if the voltage is higher than the set arc voltage value, for example, 170v, the automatic arc voltage regulating height controller U11 or U21 or U31 drives the output end to control the corresponding motor M1 or M2 or M3 to rotate reversely, and the plasma cutting torch is controlled to descend to the reference height of the set arc voltage value, otherwise, the motor M1 or M2 or M3 is controlled to rotate positively, and the plasma cutting torch is controlled to ascend to the reference height of the set arc voltage value, so that the height of the plasma cutting torch is automatically regulated to cut a workpiece;
after each plasma power supply is successfully started, normally open contacts OK1, OK2 and OK3 of the feedback relay are closed, a coil KA4, a coil KA5 and a coil KA6 of the relay are powered on, and indicator lamps L1, L2 and L3 are also lightened;
in fig. 5, when the start switches SB1, SB2, SB3 are pressed, the normally-closed contacts KA1-3 of the relay KA1 are opened, the normally-closed contacts KA2-3 of the relay KA2 are opened, and the normally-closed contacts KA3-3 of the relay KA3 are opened; at this time, the normally open contact KA4-1 of the relay KA4, the normally open contact KA5-1 of the relay KA5 and the normally open contact KA6-1 of the relay KA6 are closed, and the other input control end of the system controller U41 obtains a 0v signal, namely a plasma arcing success feedback signal;
for the situation that any two of the three plasma cutting torches are needed to be used, for example, the starting switches SB1 and SB2 are pressed down, the normally-closed contacts KA1-3 of the relay KA1 are opened, the normally-closed contacts KA2-3 of the relay KA2 are opened, and the normally-closed contacts KA3-3 of the relay KA3 are kept closed; when the first plasma power supply and the second plasma power supply are successfully started, normally open contacts OK1 and OK2 of the feedback relay are closed, a coil KA4 and a coil KA5 of the relay are electrified, and a normally open contact KA5-1 of the relay KA5 is closed; the starting switch SB3 is not pressed, the coil of the relay KA3 is powered off, and the normally closed contact KA3-3 of the relay KA3 is kept closed; the third plasma power supply does not work, the normally open contact OK3 of the feedback relay is disconnected, the coil of the relay KA6 is powered off, and the normally open contact KA6-1 of the relay KA6 is disconnected; therefore, the other input control end of the system controller U41 obtains a 0v signal, namely a plasma arcing success feedback signal, through the closed KA3-3, KA5-1 and KA 4-1; the rest are similar;
when the X-axis servo controller U42 and the Y-axis servo controller U43 work normally, coils of the relays KA11 and KA12 are powered on, normally open contacts KA11-1 of the relays KA11 and normally open contacts KA12-1 of the relays KA12 are closed, and the scram switch SB0 is closed; when the X-axis servo controller U42 and the Y-axis servo controller U43 give an alarm, the coils of the relay KA11 or KA12 are powered off, the normally open contact KA11-1 of the relay KA11 or the normally open contact KA12-1 of the relay KA12 are disconnected, or when the emergency stop switch SB0 is pressed down, the emergency stop switch SB0 is disconnected, and the system controller U41 obtains a pause signal; the relay KA8 coil can be powered off, and cutting is suspended;
in the mode of manually adjusting the height of the plasma cutting torch, the system controller U41 can enable the relay coil KA7 to lose electricity, the relay KA9 coil is controlled to be electrified to perform manual height adjustment control of the plasma cutting torch, and the relay KA10 coil is controlled to be electrified to perform manual height adjustment control of the plasma cutting torch; the normally open contacts KA9-1, KA9-2 and KA9-3 of the relay KA9 or the normally open contacts KA10-1, KA10-2 and KA10-3 of the relay KA10 can send a plasma cutting torch ascending signal or a plasma cutting torch descending signal to the corresponding arc voltage automatic height adjusting controllers U11, U21 and U31;
when cutting, if the upper limit switch SQ1 or the lower limit switch SQ2 is triggered, the motor M1 stops;
embodiment two.
In a second embodiment, an arc starting feedback system (hereinafter referred to as arc starting feedback system) of a numerical control straight bar plasma cutting machine includes relays KA1, KA2, KA4, KA5, start switches SB1, SB2, a feedback relay normally open contact OK1 of a first plasma power supply, a feedback relay normally open contact OK2 of a second plasma power supply, a scram switch SB0, a system controller U41, an X-axis servo controller U42, a Y-axis servo controller U43, relays KA11, KA12; indicator lights L1, L2 may also be included; the plasma cutting torch is suitable for the conditions of two plasma cutting torches and two corresponding plasma power supplies;
the starting switches SB1 and SB2 are normally open switches, such as button switches with self-locking function; the emergency stop switch SB0 adopts a normally closed switch;
a series branch after the coil of the relay KA1 and the starting switch SB1 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA2 coil and the starting switch SB2 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA4 coil and the feedback relay normally open contact OK1 of the first plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA5 coil and a feedback relay normally open contact OK2 of the second plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
the indicator lamp L1 is connected in parallel with two ends of the coil of the relay KA4, and the indicator lamp L2 is connected in parallel with two ends of the coil of the relay KA 5;
the emergency stop switch SB0, the normally open contact KA12-1 of the relay KA12 and the normally open contact KA11-1 of the relay KA11 are connected in series to form a serial branch, one end of the serial branch is connected with 0v, and the other end of the serial branch is connected with one input control end of the system controller U41;
the other input control end of the system controller U41 is connected with one end of a normally closed contact KA1-3 of the relay KA1 and one end of a normally open contact KA4-1 of the relay KA 4; the other end of the normally-closed contact KA1-3 of the relay KA1 and the other end of the normally-open contact KA4-1 of the relay KA4 are connected with one end of the normally-closed contact KA2-3 of the relay KA2 and one end of the normally-open contact KA5-1 of the relay KA 5; the other end of the normally closed contact KA2-3 of the relay KA2 and the other end of the normally open contact KA5-1 of the relay KA5 are connected with 0v;
the X-axis servo driving end of the system controller U41 is connected with the X-axis servo controller U42, the alarm end of the X-axis servo controller U42 is connected with one end of a coil of the relay KA11, and the other end of the coil of the relay KA11 is connected with the positive voltage VCC;
the Y-axis servo driving end of the system controller U41 is connected with the Y-axis servo controller U43, the alarm end of the Y-axis servo controller U43 is connected with one end of a coil of the relay KA12, and the other end of the coil of the relay KA12 is connected with the positive voltage VCC;
the arc voltage automatic height adjusting controller U31 and the corresponding peripheral circuits of the third plasma cutting torch are not required to be arranged.
The control principle is similar to that in the first embodiment, and will not be described in detail.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (4)
1. The arcing feedback system of the numerical control straight bar plasma cutting machine is characterized by comprising relays KA1, KA2, KA3, KA4, KA5, KA6, starting switches SB1, SB2 and SB3, a feedback relay normally open contact OK1 of a first plasma power supply, a feedback relay normally open contact OK2 of a second plasma power supply, a feedback relay normally open contact OK3 of a third plasma power supply, an emergency stop switch SB0, a system controller U41, an X-axis servo controller U42, a Y-axis servo controller U43 and relays KA11 and KA12;
the starting switches SB1, SB2 and SB3 are normally open switches, and the scram switch SB0 is normally closed switches;
a series branch after the coil of the relay KA1 and the starting switch SB1 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA2 coil and the starting switch SB2 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA3 coil and the starting switch SB3 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA4 coil and the feedback relay normally open contact OK1 of the first plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA5 coil and a feedback relay normally open contact OK2 of the second plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA6 coil and a feedback relay normally open contact OK3 of the third plasma power supply are connected in series is respectively connected with positive voltage VCC and 0v at two ends;
the emergency stop switch SB0, the normally open contact KA12-1 of the relay KA12 and the normally open contact KA11-1 of the relay KA11 are connected in series to form a serial branch, one end of the serial branch is connected with 0v, and the other end of the serial branch is connected with one input control end of the system controller U41;
the other input control end of the system controller U41 is connected with one end of a normally closed contact KA1-3 of the relay KA1 and one end of a normally open contact KA4-1 of the relay KA 4; the other end of the normally-closed contact KA1-3 of the relay KA1 and the other end of the normally-open contact KA4-1 of the relay KA4 are connected with one end of the normally-closed contact KA2-3 of the relay KA2 and one end of the normally-open contact KA5-1 of the relay KA 5; the other end of the normally-closed contact KA2-3 of the relay KA2 and the other end of the normally-open contact KA5-1 of the relay KA5 are connected with one end of the normally-closed contact KA3-3 of the relay KA3 and one end of the normally-open contact KA6-1 of the relay KA6, and the other end of the normally-closed contact KA3-3 of the relay KA3 and the other end of the normally-open contact KA6-1 of the relay KA6 are connected with 0v;
the X-axis servo driving end of the system controller U41 is connected with the X-axis servo controller U42, the alarm end of the X-axis servo controller U42 is connected with one end of a coil of the relay KA11, and the other end of the coil of the relay KA11 is connected with the positive voltage VCC;
the Y-axis servo driving end of the system controller U41 is connected with the Y-axis servo controller U43, the alarm end of the Y-axis servo controller U43 is connected with one end of the coil of the relay KA12, and the other end of the coil of the relay KA12 is connected with the positive voltage VCC.
2. The arc starting feedback system of the numerical control straight bar plasma cutting machine according to claim 1, further comprising indicator lamps L1, L2, L3;
the pilot lamp L1 connects in parallel at relay KA4 coil both ends, and pilot lamp L2 connects in parallel at relay KA5 coil both ends, and pilot lamp L3 connects in parallel at relay KA6 coil both ends.
3. The arcing feedback system of the numerical control straight bar plasma cutting machine is characterized by comprising relays KA1, KA2, KA4 and KA5, starting switches SB1 and SB2, a feedback relay normally open contact OK1 of a first plasma power supply, a feedback relay normally open contact OK2 of a second plasma power supply, an emergency stop switch SB0, a system controller U41, an X-axis servo controller U42, a Y-axis servo controller U43 and relays KA11 and KA12;
the starting switches SB1 and SB2 are normally open switches; the emergency stop switch SB0 adopts a normally closed switch;
a series branch after the coil of the relay KA1 and the starting switch SB1 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA2 coil and the starting switch SB2 are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA4 coil and the feedback relay normally open contact OK1 of the first plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
a series branch after the relay KA5 coil and a feedback relay normally open contact OK2 of the second plasma power supply are connected in series is respectively connected with positive voltages VCC and 0v at two ends;
the emergency stop switch SB0, the normally open contact KA12-1 of the relay KA12 and the normally open contact KA11-1 of the relay KA11 are connected in series to form a serial branch, one end of the serial branch is connected with 0v, and the other end of the serial branch is connected with one input control end of the system controller U41;
the other input control end of the system controller U41 is connected with one end of a normally closed contact KA1-3 of the relay KA1 and one end of a normally open contact KA4-1 of the relay KA 4; the other end of the normally-closed contact KA1-3 of the relay KA1 and the other end of the normally-open contact KA4-1 of the relay KA4 are connected with one end of the normally-closed contact KA2-3 of the relay KA2 and one end of the normally-open contact KA5-1 of the relay KA 5; the other end of the normally closed contact KA2-3 of the relay KA2 and the other end of the normally open contact KA5-1 of the relay KA5 are connected with 0v;
the X-axis servo driving end of the system controller U41 is connected with the X-axis servo controller U42, the alarm end of the X-axis servo controller U42 is connected with one end of a coil of the relay KA11, and the other end of the coil of the relay KA11 is connected with the positive voltage VCC;
the Y-axis servo driving end of the system controller U41 is connected with the Y-axis servo controller U43, the alarm end of the Y-axis servo controller U43 is connected with one end of the coil of the relay KA12, and the other end of the coil of the relay KA12 is connected with the positive voltage VCC.
4. The arc starting feedback system of the numerical control straight bar plasma cutting machine according to claim 3, further comprising indicator lamps L1, L2;
the pilot lamp L1 connects in parallel at relay KA4 coil both ends, and the pilot lamp L2 connects in parallel at relay KA5 coil both ends.
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