CN210925833U

CN210925833U - CNC lathe switch

Info

Publication number: CN210925833U
Application number: CN202020038720.8U
Authority: CN
Inventors: 谢厚亮; 朱华西
Original assignee: Zhangjiajie Institute of Aeronautical Engineering
Current assignee: Zhangjiajie Institute of Aeronautical Engineering
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-07-03
Anticipated expiration: 2030-01-09

Abstract

The CNC machine tool switch mainly comprises a fixed disc A (1), a fixed disc B (2), a rotating disc (3), a motor (4), a belt (5), a binding post A (6), a screw cap A (7), a binding post B (8), a screw cap B (9), a copper sheet A (10), a magnetic seat (11) and a spring A (12), wherein an external power supply U, V, M utilizes a binding post T (210), through nut third (201) locking, copper sheet second (211) and copper sheet pentagon (314) contact, have transmitted copper sheet third (307) through terminal (313), transmit copper sheet fourth (309) through terminal pentagon (303), transmit brake block (311) again, transmit copper sheet first (10) again, external power supply U, V, M end transmits U, V, M end to copper sheet first (10), many motors are controlled to CNC lathe switch utilizes a small-size converter, the timing operation and the stopping of controlling the motor for the CNC lathe provides a cost performance high technical scheme.

Description

CNC lathe switch

Technical Field

The application belongs to electrical products, and particularly relates to a knife switch.

Background

In a CNC machine tool, due to the complexity of the motion trajectory, one machine tool often has several servo motors or stepping motors as power, the operation of the several motors is often controlled by a frequency converter or a PLC program, some frequency converters also have program chips, however, the circuit of the program control is strictly affected by the program safety, once the program is disordered, the control of the motors is in trouble, which may cause the damage of the machine tool or the reduction of the precision of the machine tool, if there are 5 motors now, and synchronous operation is not allowed, then there is a time difference between the start and stop time of the 5 motors, and for safety, during the general program design, there is a safety margin, if only one motor is in trouble of start or stop time, no serious consequence is caused due to the existence of the safety margin, for example, the single-energy machine is provided with a longitudinal slide rail, a transverse slide rail is arranged above the longitudinal slide rail, a motor for controlling the longitudinal advance or retreat of the slide rail is controlled by hydraulic pressure, however, a hydraulic circuit has problems, so that the longitudinal slide rail does not reach a set value when in operation, the machine tool can prevent the slide rail operation distance from exceeding the set value by using a limit screw rod, namely, when the slide rail reaches a specified position but the motor does not stop, the limit screw rod stops the slide rail to continue to advance, at the moment, the motor operation is blocked, the working current of the motor is increased, a motor protection device can cut off the power supply, the safety of the machine tool is protected, but the method can not control the slide rail not reach the set position, when the slide rail does not reach the set position, the PLC program design is that the transverse slide rail can not be started, but if the transverse slide, usually, a worker needs to attend 2 to 3 machine tools at the same time, the worker is difficult to find abnormality in time, so that the cutter is not processed at a designed part, a workpiece is directly knocked off, a cutter bar of the cutter is broken off, the workpiece is seriously likely to fly out, if the worker is knocked off, even the worker is likely to cause industrial injury or casualty accidents, a part of hardware factories, mechanical factories and the like often have metal dust with higher concentration, some solvents and the like, and the metal dust or the solvents are likely to cause circuit board abnormality of a control circuit, so as to cause problems, generally, the circuit boards have safety protection measures, however, the metal dust or the solvents are not introduced without holes, the brittle metal processing machine tool is often short in service life and easy to lose precision, and in the factory, the brittle metal processing machine tool is usually a machine tool with low arrangement precision and relatively low price, in the machining of mechanical parts, in order to reduce the clamping times and improve the machining precision, the machining of mechanical products cannot adopt a production line, and in order to improve the working efficiency, the multi-process machining capacity of a single machine tool is improved as much as possible, for example, turning, milling, drilling, tapping and the like are completed on the same machine tool, but the machine tool uses a plurality of motors, the control of the motors becomes more complex, therefore, the step time executed by different motors is different in the machining process of different workpieces, and the realization of the point has two schemes, one is to control the operation time of each motor by using a machine tool program, the other is to control by using a frequency converter, in the control of the frequency converter, one motor is required to be provided with the frequency converter, the price of the frequency converter is high, in addition, the complexity of a factory environment is complex, and the service life of the frequency converter is not very long, the frequency converter is relatively high in use cost, the probability of tool breakage is high when the frequency converter is controlled by a machine tool program, and the precision of the machine tool is greatly influenced when the frequency converter is abnormal.

SUMMERY OF THE UTILITY MODEL

The technical problems to be solved are as follows:

1. when the control circuit is required to be prevented from generating problems, the synchronous operation of a plurality of CNC machine tool motors which cannot synchronously operate occurs;

2. the problem that one motor is provided with one frequency converter, so that the use cost of the frequency converter is high is solved.

The technical scheme is as follows: the CNC machine tool switch mainly comprises a fixed disc A1, a fixed disc B1, a rotating disc 3, a motor 4, a belt 5, a binding post A6, a screw cap A7, a binding post B8, a screw cap B9, a copper sheet A10, a magnetic seat 11 and a spring A12, wherein an external power supply U, V, M utilizes the binding post D210 and is locked through a screw cap C201, the binding post D210 is communicated with a copper sheet B211, the copper sheet B211 is contacted with a copper sheet V314 and is transmitted to the copper sheet C307 through the binding post 313, and is transmitted to the copper sheet D309 through the binding post V303, then transmitted to the brake block 311 and then transmitted to the copper sheet A10, so far, the end of the external power supply U, V, M is transmitted to the U, V, M end of the copper sheet A10, and the current cannot pass through because the magnetic seat 11 is an insulator, and:

1.1) the motor 4 is controlled by a frequency converter, the motor 4 rotates, the rotating disc 3 is driven to rotate through the belt 5, the copper sheet A10 and the magnetic seat 11 rotate along with the rotation, when the magnetic seat 11 falls into the positioning groove A102, the motor 4 stops rotating, because the positioning groove A102 is a concave groove, the copper sheet A10 is pressed down, when the pressure exceeds the elastic force of the spring B208, the spring column B209 descends along with the pressure, the current is contacted with the wiring column C207, the current is transmitted to the wiring column C207 from the copper sheet A10 through the spring column B209, the wiring column C207 is connected to a wiring box of the motor to be controlled through a lead, and therefore, the controlled motor starts to be powered on and starts;

1.2) when the motor 4 rotates again, the running resistance of the motor 4 overcomes the resistance of the spring A12, because the positioning groove A102 is a conical groove, the magnetic base 11 leaves the position of the positioning groove A102, the magnetic base 11 lifts the position of the copper sheet A10, the spring B208 bounces the spring column B209, the spring column B209 is separated from the wiring terminal C207, the current cannot be transmitted to the wiring box of the motor to be controlled from the copper sheet A10, and the circuit is disconnected.

The fixed disk A1 mainly comprises PEN line holes 101, positioning grooves A102, double-column holes 103 and positioning grooves B104, the fixed disk A1 is of an annular structure, the lower edge of the inner side of the annular structure is provided with a flange, the flange is provided with a concave V-shaped positioning groove A102 and a concave V-shaped double-column hole 103, the PEN line holes 101 are arranged at the bottom of the positioning groove A102, the positioning grooves A102 and the double-column holes 103 are distributed in a staggered mode, the positioning grooves B104 are distributed on the inner side of the annular structure,

two copper columns are arranged in the double-column hole 103, one of the two copper columns is connected to the copper sheet A10, the other copper column is connected to the control circuit board, but the two copper columns are not connected, therefore, current cannot be transmitted to the control circuit board from the copper sheet A10, when the magnetic base 11 runs along with the rotating disc 3 and runs to the position of the double-column hole 103, the two copper columns are connected by the copper column 112, the current is transmitted to the control circuit board from the copper sheet A10, the control board obtains current information, the circuit of the motor 4 is disconnected, and the rotating disc 3 stops rotating,

the PEN wire is a commonly-known zero wire, the PEN wire hole 101 is positioned at the bottom of the positioning groove A102 and used for installing the wiring terminal A6, after the magnetic base 11 falls into the positioning groove A102, the copper column 112 is in contact with the wiring terminal A6, the positioning groove A102 is a conical groove, so that when the rotating disc 3 rotates, the magnetic base 11 is conveniently lifted, the double-column hole 103 is provided with two non-communicated holes and used for arranging double columns, one of the double columns is connected to a power supply, and the other double column is connected to an electromagnetic relay or a control circuit board; the positioning groove B104 is matched with the positioning strip A205 to prevent the fixed disk A1 from rotating outside the fixed disk B2.

The fixed disc B mainly comprises a screw cap C201, a screw cap T202, a machine foot 203, a tool holder hole 204, a positioning strip A205, a central hole 206, a binding post C207, a tool holder 2071, a spring B208, a spring post B209, a binding post T210, a copper sheet B211, a copper sheet groove B212, a binding post hole A213, a motor base 214 and a positioning strip B215;

the screw cap C201 is screwed on the terminal post C210, the screw cap T202 is screwed on the terminal post C207, the terminal post C210 and the copper sheet B211 are of an integral structure, wherein the copper sheet B211 is a circular ring structure, moreover, the circular ring at the U, V, M end has size difference, the inner diameter and the outer diameter of the circular ring at the U, V, M end have corresponding relation with the inner diameter and the outer diameter of the copper sheet groove B212, the wiring terminal T210 is inserted into the wiring terminal hole A213, the U, V, M end of the power supply is locked by the screw cap C201 is wired on the fixed disc B2, the wiring terminal C207 is inserted into the knife rest hole 204, the U, V, M end of the wire outlet end is locked by the screw cap T202 on the fixed disc B2, when the rotary one-way electric switch needs to be fixed, the machine foot 203 is changed into a structure playing a fixing role, for example, the central hole 206 is located at the center of the fixed disk b, the central hole 206 is used for inserting the central shaft of the rotating disk, and the front end of the central shaft is a pulley groove 316.

The rotating disc mainly comprises a binding post hole B301, a copper sheet groove C302, a binding post penta 303, a threaded hole A304, a blind hole 305, a screw cap penta 306, a copper sheet C307, a screw cap already 308, a copper sheet T309, a screw rod A310, a knife holder 311, a rivet 312, a binding post already 313, a copper sheet penta 314, a copper sheet groove T315, a pulley groove 316 and a positioning groove C317,

the wiring column hole B301 is positioned in a recessed groove position of the copper sheet groove D315, the wiring column hole B301 is used for inserting a wiring column 313, the copper sheet groove D302 is a recessed groove, one end of the copper sheet groove D302 is the wiring column hole B301, the other end of the copper sheet groove D302 is the wiring column E303, the copper sheet C307 is placed in the copper sheet groove D302, the screw cap E306 is used for screwing the wiring column E313, the screw rod A310 is screwed in the threaded hole A304, one end of the copper sheet T309 is placed in the wiring column E303, the other end of the copper sheet T309 presses the brake block 311, the screw cap 308 is screwed in the wiring column E303, so that the copper sheet C307 and the copper sheet T309 are pressed, the lower end of the brake block 311 is inserted into the blind hole 305, the wiring column E313 and the copper sheet E314 are of an integrated structure, the copper sheet E314 is placed in the copper sheet groove D315, the inner diameters of the copper sheet groove, the copper sheet B211 and the copper sheet B314 correspond to each other respectively, the copper sheet B211 and the copper sheet B314 both take the center hole 206 as a circle center, and the running track of the rotating copper sheet B314 is overlapped with the area of the stationary copper sheet B211, so that the copper sheet B211 and the stationary copper sheet B can be always in a contact state no matter what angle the copper sheet B rotates to.

The magnetic base 11 mainly comprises a copper sheet groove A111, a copper column 112, a resistor 113 and a spring column A114, wherein the copper sheet groove A111 is used for inserting the copper sheet A10, the magnetic base 11 is provided with two or three copper sheet grooves A111 which respectively correspond to single-phase electricity and three-phase electricity, one end of the resistor 113 is connected with the copper sheet A10, and the other end of the resistor 113 is connected with the copper column 112, only the magnetic base with a three-phase structure is provided with the resistor 113, the three resistors need the same relevant technical parameters, the lower end of the copper column 112 is positioned below the V-shaped structure of the magnetic base 11, the spring column A114 is positioned above the magnetic base 11, the spring column A114 is used for placing the spring A12, and the spring A12 has the function that when the magnetic base 11 falls into the positioning groove A102, the spring A12 compresses the magnetic base 11, the elastic force of the spring A12 is larger than the elastic force of the spring B208, and when the magnetic base 11 rotates.

The open-phase protection has two types, wherein one type is that a resistor is welded at the front end of a copper sheet nail 10, the rated resistance value of the U, V, M end is the same, the rated voltage value is the same, the other ends of three resistors 113 are all connected to a copper column 112, when a magnetic seat 11 falls into a positioning groove nail 102, the copper column 112 is connected with a binding post nail 6, the binding post nail 6 is connected with a circuit control board to provide an electric signal, when a circuit U, V, M supplies power normally, the copper column 112 acts as a PEN line, namely a commonly-called zero line, at the moment, the current of the copper column 112 is 0, the circuit control board does not act, when the U, V, M end has only two phases or one phase which is normal, at the moment, the current of the copper column 112 is not 0 any more, the circuit control board;

the other method is that an electromagnetic relay is directly used for open-phase protection, a proper resistor 113 is selected according to the rated voltage of the electromagnetic relay through the voltage reduction effect of the resistor 113, the copper column 112 has no current when the electromagnetic relay does not work because of normal operation, and when the copper column 112 has current when the electromagnetic relay works in open-phase operation, the electromagnetic relay acts to cut off the power supply, so that the open-phase operation of the motor is prevented.

The stroke control means that a circuit from the W end to the electromagnetic relay is controlled by the double-column hole 103, the double-column hole 103 is provided with two copper columns, one of the two copper columns is connected to the copper sheet A10, the other copper column is connected to the control circuit board, but the two copper columns are not connected, the copper column 112 is not connected with the two copper columns of the double-column hole 103, the electromagnetic relay cannot work, a loop is formed at the position A, B, the MOTOR2 can work, when the copper column 112 connects the two copper columns with the circuit, the electromagnetic relay works, the position A, B is disconnected, the loop cannot be formed, and the MOTOR2 stops running.

Has the advantages that: the switch of the CNC machine tool is started by utilizing a frequency converter in a time-sharing way, so that the switch of a plurality of motors is controlled, and a sequential circuit controlled by utilizing a PLC program and the like is utilized, the motor controlled by utilizing the switch of the CNC machine tool has the starting of only one motor, the result caused by the simultaneous starting of the plurality of motors can not be caused, meanwhile, the switch of the CNC machine tool can also be used as an auxiliary safety switch of the PLC or a numerical control program, the simultaneous starting of the plurality of motors is prevented, the switch of the CNC machine tool has the cost advantage of controlling the plurality of motors at low cost, the safety is high, the switch can not be used as a variable frequency power supply, and a.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a CNC switch;

FIG. 2 is a schematic diagram of the overall structure of the CNC switch;

FIG. 3 is a schematic diagram of the overall explosion structure of the CNC switch;

FIG. 4 is a schematic structural view of a fixed disk A;

FIG. 5 is a schematic view of a magnetic mount structure;

FIG. 6 is a schematic diagram of an explosion structure of a fixed disk B and parts on the fixed disk B;

FIG. 7 is a schematic structural view of a fixed disk B;

FIG. 8 is a schematic structural view of a fixed disk B;

FIG. 9 is a schematic structural view of a tool holder and related parts;

FIG. 10 is a schematic view of a rotating disk configuration;

FIG. 11 is a schematic view of the rotating disc and the exploded structure of the parts on the rotating disc;

fig. 12 is a circuit schematic of the open-phase protection circuit and the trip limit circuit.

In the figure, 1 is a fixed disk A, 2 is a fixed disk B, 3 is a rotating disk, 4 is a motor, 5 is a belt, 6 is a terminal A, 7 is a nut A, 8 is a terminal B, 9 is a nut B, 10 is a copper sheet A, 11 is a magnetic seat, 12 is a spring A, 101 is a PEN wire hole, 102 is a positioning groove A, 103 is a double-column hole, 104 is a positioning groove B, 111 is a copper sheet groove A, 112 is a copper column, 113 is a resistor, 114 is a spring column A, 201 is a nut C, 202 is a nut D, 203 is a machine foot, 204 is a cutter holder hole, 205 is a positioning strip A, 206 is a central hole, 207 is a terminal C, 1 is a cutter holder, 208 is a spring B, 209 is a spring column B, 210 is a terminal D, 211 is a copper sheet B, 212 is a copper sheet groove B, 213 is a terminal column hole A, 214 is a motor seat, 215 is a positioning strip B, 301 is a terminal column hole B, 302 is a terminal groove C, 303 is a terminal E, 304 is a threaded hole E, 305 is a blind hole, 306 is a screw cap penta, 307 is a copper sheet third, 308 is a screw cap, 309 is a copper sheet third, 310 is a screw rod first, 311 is a knife holder, 312 is a rivet, 313 is a binding post, 314 is a copper sheet penta, 315 is a copper sheet groove third, 316 is a belt pulley groove, 317 is a positioning groove third,

in fig. 12, MOTOR1 denotes a controlled MOTOR, and MOTOR2 denotes a MOTOR 4.

Detailed Description

Specific embodiments of the present application will be described with reference to the accompanying drawings.

In the drawings of the specification, reference numerals denote parts divided into insulators and conductors, and the following parts are conductors: the three-phase circuit comprises a binding post A6, a screw cap A7, a binding post B8, a screw cap B9, a copper sheet A10, a copper column 112, a resistor 113, a screw cap C201, a screw cap T202, a binding post C207, a spring B208, a spring post B209, a binding post T210, a copper sheet B211, a binding post V303, a screw cap V306, a copper sheet C307, a screw cap already 308, a copper sheet T309, a screw rod A310, a brake holder 311, a rivet 312, a binding post already 313 and a copper sheet V314, wherein parts in contact with conductors are insulators, three phases of U, V, M or A, B, C are commonly shown in the three-phase circuit, U, V, M is commonly recorded in the specification for the sake of unification, only one of three phase symbols U, V, M is shown in the drawings for simplifying the description of the drawings of the specification, only one group is shown in the drawings with a circumferential array relationship, and the circumferential array relationship is, the parts are centered on the central hole 206, the parts are distributed around the central hole 206 at equal angles, the drawings in the specification show 6 groups, for example, 204 shows a tool holder connecting hole, U, V, M in three phases all show the tool holder connecting hole 204, because there are 6 groups in the circumferential array, the number of the tool holder connecting holes is 18, and only one of the tool holder connecting holes is marked in fig. 6.

The brief introduction of the circuit situation is that an external power supply U, V, M utilizes a terminal post 210 to be locked through a nut cap 201, the terminal post 210 is communicated with a copper sheet B211, the copper sheet B211 is contacted with a copper sheet V314, and is transmitted to a copper sheet C307 through a terminal post 313, is transmitted to the copper sheet T309 through a terminal post V303, is transmitted to a gate holder 311 and is transmitted to a copper sheet A10, so far, an external power supply U, V, M end is transmitted to a U, V, M end of the copper sheet A10, and as the magnetic holder 11 is an insulator, current cannot pass through, and at this time, the following situations are respectively explained.

The motor 4 is controlled by a frequency converter, the motor 4 rotates, the rotating disc 3 is driven to rotate through the belt 5, the copper sheet A10 and the magnetic seat 11 rotate along with the copper sheet A, when the magnetic seat 11 falls into the positioning groove A102, the motor 4 stops rotating, the positioning groove A102 is a recessed groove, therefore, the copper sheet A10 is pressed down, when the lower pressure exceeds the elastic force of the spring B208, the spring column B209 descends along with the magnetic seat to be in contact with the wiring terminal C207, current is transmitted to the wiring terminal C207 from the copper sheet A10 through the spring column B209, the wiring terminal C207 is connected into a wiring box of the motor to be controlled through a lead, and therefore, the controlled motor starts to be powered.

When the motor 4 rotates again, the running resistance of the motor 4 overcomes the resistance of the spring A12, because the positioning groove A102 is a conical groove, the magnetic base 11 leaves the position of the positioning groove A102, the magnetic base 11 lifts the position of the copper sheet A10, the spring B208 bounces the spring post B209, the spring post B209 is separated from the wiring terminal C207, the current cannot be transmitted to the wiring box of the motor to be controlled from the copper sheet A10, and the circuit is disconnected.

Open-phase protection, the front end welding of copper sheet first 10 has the resistance, the resistance value that requires U, V, M end is the same, the other end of three resistance 113 all is connected to copper post 112, when magnetic base 11 fell into positioning groove first 102, copper post 112 and terminal first 6 switch on, terminal first 6 is connected with the circuit control board, provide a signal, when circuit U, V, M normally supplies power, copper post 112 effect is the PEN line, the PEN line is the commonly known zero line, at this moment, copper post 112 electric current is 0, the circuit control board does not move, only two-phase or one looks are normal when U, V, M end, at this moment, copper post 112 electric current no longer is 0, the circuit control board effect, the power supply is cut off, prevent that the motor from moving in the open-phase.

Or, the electromagnetic relay is directly used for open-phase protection, and the appropriate resistor 113 is selected according to the rated voltage of the electromagnetic relay through the voltage reduction function of the resistor 113, for example, an electromagnetic relay with a voltage of 6V and a current of 500mA is currently used, the working current is usually 1.5 times of the rated current, and the calculation is performed through a formula, (380-6)/(0.5 × 1.5) =498.6 ohm, that is, the resistance value of the resistor 113 is 500 ohm.

And in the stroke control, two copper columns are installed in the double-column hole 103, one of the two copper columns is connected to the copper sheet A10, the other copper column is connected to the control circuit board, but the two copper columns are not connected, so that current cannot be transmitted to the control circuit board from the copper sheet A10, when the magnetic base 11 runs along with the rotating disc 3, the magnetic base runs to the position of the double-column hole 103, the two copper columns are connected by the copper column 112, the current is transmitted to the control circuit board from the copper sheet A10, the control board obtains current information, a circuit of the motor 4 is disconnected, and the rotating disc 3 stops rotating.

FIG. 1, FIG. 2 and FIG. 3 are schematic diagrams of the overall structure of the CNC switch; the fixed disc A1 and the fixed disc B2 are fixed, the rotating disc 3 rotates around the central hole 206, and the rotation is driven by the motor 4.

Regarding the connection problem between the inverter and the power source and the motor, the power source U, V, M end is connected to the incoming wire U, V, M end of the inverter, the outgoing wire U, V, M end is connected to the U, V, M end of the terminal box of the motor, and if the motor is a single-phase motor, the zero wire and the live wire correspond to each other.

Fig. 4 is a schematic structural diagram of a fixed disk a, the fixed disk a 1 mainly comprises a PEN wire hole 101, a first positioning groove 102, a double-column hole 103 and a second positioning groove 104, the PEN wire is a commonly known zero line, the PEN wire hole is located at the bottom of the first positioning groove 102 and is used for installing a first binding post 6, after the magnetic seat 11 falls into the first positioning groove 102, a copper column 112 is in contact with the first binding post 6, and the first positioning groove 102 is a conical groove, so that when the rotating disk 3 rotates, the magnetic seat 11 is conveniently lifted, the double-column hole 102 is provided with two non-communicated holes and is used for arranging double columns, one of the double columns is connected to a power supply, the other double columns are connected to an electromagnetic relay or a control circuit board, the second positioning groove 104 is located at the outer edge of the fixed disk a 1, and the second positioning groove 104 is matched with the first positioning strip 205.

FIG. 5 is a schematic diagram of a magnetic base structure, wherein the magnetic base 11 mainly comprises a copper sheet channel A111, a copper column 112, a resistor 113 and a spring column A114, the copper sheet channel A111 is used for inserting the copper sheet A10, the magnetic base 11 has two or three copper sheet channel A111 respectively corresponding to single-phase electricity and three-phase electricity, one end of the resistor 113 is connected with the copper sheet A10, the other end is connected with the copper column 112, only the magnetic base with the three-phase structure has the resistor 113, the three resistors need to have the same relevant technical parameters, the lower end of the copper column 112 is positioned below the V-shaped structure of the magnetic base 11, the spring column shell 114 is positioned above the magnetic base 11, the spring column shell 114 is used for placing the spring shell 12, the spring shell 12 has the functions, when the magnetic base 11 falls into the positioning groove A102, the spring A12 presses the magnetic base 11, the elastic force of the spring A12 is larger than that of the spring B208, when the magnetic base 11 rotates and leaves the positioning slot A102, the spring A12 contracts to ensure the magnetic base 11 to rotate smoothly.

Fig. 6, 7, 8, and 9 are schematic diagrams of explosion structures of parts on the second fixed disk and the second fixed disk, where the parts on the second fixed disk and the second fixed disk mainly include the following parts: the device comprises a nut C201, a nut T202, a machine foot 203, a tool holder hole 204, a positioning strip A205, a central hole 206, a terminal C207, a tool holder 2071, a spring B208, a spring post B209, a terminal T210, a copper sheet B211, a copper sheet groove B212, a terminal post hole A213, a motor base 214 and a positioning strip B215.

The screw cap C201 is screwed on the terminal post C210, the screw cap T202 is screwed on the terminal post C207, the terminal post C210 and the copper sheet B211 are of an integral structure, wherein the copper sheet B211 is a circular ring structure, the circular ring at the U, V, M end has size difference, the inner diameter and the outer diameter of the circular ring at the U, V, M end have corresponding relation with the inner diameter and the outer diameter of the copper sheet groove B212, the wiring terminal T210 is inserted into the wiring terminal hole A213, the U, V, M end of the power supply is locked by the screw cap C201 is wired on the fixed disc B2, the wiring terminal C207 is inserted into the knife rest hole 204, the U, V, M end of the wire outlet end is locked by the screw cap T202 on the fixed disc B2, when the CNC switch is required to be fixed, the machine foot 203 is changed into a structure with a fixing function, for example, the central hole 206 is located at the center of the fixed disk b, the central hole 206 is used for inserting the central shaft of the rotating disk, and the front end of the central shaft is a pulley groove 316.

The tool holder 2071 is an insulating structure, the lower end of the tool holder is a conductor terminal rod 207,

the spring post B209 is used for installing a spring B208, two ends of the spring post B209 are larger than the middle spring post part, and the outer diameter of the lower end of the spring post B209 is larger than the hole diameter of the central hole at the upper part of the cutter connecting frame 2071.

214 is a motor base, the motor base is used for installing the motor 4, it should be noted that the motor base is also required to be provided with structures such as an installation hole and the like, the common knowledge belongs to, and the drawings of the specification are not drawn.

The positioning strip B215 is of a protruding ring structure and is matched with the positioning groove C317, so that the rotating disc 3 rotates around the fixed disc B2 and the fixed disc B2 coaxially rotate.

FIGS. 10 and 11 are schematic views of the rotary disk and the structure of the parts on the rotary disk;

the rotating disc mainly comprises a wiring post hole B301, a copper sheet groove C302, a wiring post V303, a threaded hole A304, a blind hole 305, a screw cap V306, a copper sheet C307, a screw cap already 308, a copper sheet T309, a screw rod A310, a knife holder 311, a rivet 312, a wiring post already 313, a copper sheet V314, a copper sheet groove T315, a pulley groove 316 and a positioning groove C317,

Fig. 12 is a circuit diagram of the open-phase protection and stroke control principle, in which only one of the end lines at U, V, M is shown, the actual product is 3 end lines, in the diagram, the resistance values of R1, R2 and R3 are the same, when the power supply is normal, the connection line behind R1, R2 and R3 is a zero line, no current exists, the electromagnetic relay cannot work, when the phase is lost, the current exists in the zero line, the electromagnetic relay starts to act, A, B is separated, the power supply at the U end is switched in the B end, then the path from the a end to the moutr 1 end is disconnected, V, M is also disconnected based on the same principle, therefore, the motor moutr 1 stops operating, and thus the open-phase operation is prevented.

The control of the stroke is carried out,

the circuit from the W end to the electromagnetic relay is controlled by two columns, after the circuit is disconnected by the two columns, the electromagnetic relay cannot work, a loop is formed at A, B, the MOTOR2 can work, when the two columns are connected with the circuit, the electromagnetic relay works, the loop cannot be formed at A, B, and the MOTOR2 stops running, which shows that the MOTOR 4 is used as a control MOTOR of a CNC switch, the power is very small, therefore, the MOTOR is a single-phase MOTOR, only a live wire needs to be disconnected, namely, a connecting wire in the drawing is connected from the W end E end to a live wire, in addition, two wires of the single-phase MOTOR are respectively a live wire and a live wire, in the illustration, in the open-phase protection, the U, V, M ends are both live wires, and in the travel control, the U end is not a live wire but a live wire, namely, the circuit formed by the two functions is isolated.

The basic process of frequency converter control, utilize the frequency converter to control the electric motor 4, because the frequency converter possesses the multistage control ability, namely can control the electric motor to run for a period of time, stop running for a period of time, enter the operation of the next stage, utilize this function of the frequency converter to realize the control of many electric motors, when the electric motor 4 drives the magnet holder 11 to enter the locating slot first 102, at this moment, the controlled electric motor begins to run, the frequency converter controls the electric motor 4 to stop running, wherein the time that the electric motor 4 stops running is the working time of the controlled electric motor, the frequency converter controls the electric motor 4 to restart, to the position of the double column hole 103, the electric motor 4 stops running, at this moment, the controlled electric motor stops running, this time setting is the running time difference of the two electric motors to be controlled, when the frequency converter starts the electric motor 4, the second controlled electric motor begins, the rest of the control process is analogized in turn, because in the control process, the running time of the controlled motor is the frequency converter stop control section, so that the time for controlling the motor by the frequency converter is very short, namely, the frequency converter is in the stop control time period in most of the time, compared with the existing frequency converter, the service life of the frequency converter can be prolonged, and in addition, only one frequency converter is needed for a plurality of motors, so that the cost is further saved, taking the running of three motors A, B, C as an example, the power of the three motors is respectively 7.5KW for A motor, 0.75KW for B motor, 1.1kW for C motor, a part needs to be processed, the following requirements are that the running rule is as follows, the interval is 5S after the running of the A motor is 130S, the interval is 3S after the running of the B motor is 60S, the interval is 20S after the running of the C motor is 75, the motor A starts to run again, the process is repeated in this way, part machining is completed, S is second, 3 frequency converters are needed for control by adopting the frequency converters, the three frequency converters cannot be coordinated due to time, namely, the interval time of the two motors cannot be carried out according to the set requirement, a host computer is needed to be controlled by adopting a PLC (programmable logic controller) or a CNC mainboard, namely, the time sequence of the three frequency converters is coordinated through a mainboard or a PLC program, and the operation can be realized by adopting a CNC switch, because the CNC switch only adopts one frequency converter, the clock of the frequency converter can be set in the frequency converter, and if the frequency converter is 7.5KW, the price of the frequency converter is greatly different from that of the frequency converter of 0.75KW, the frequency converter of the application can adopt the frequency converter of 0.37KW from the current frequency converter, in addition, because the application only aims at starting the motor 4, and the running time of the motor 4 is less, the service life of the corresponding frequency converter is prolonged, for a high-power electric appliance, the motor 4 is only used as a starting circuit, however, some motors actually need a variable frequency power supply, namely, the voltage and the current of the power supply are strictly limited, the common industrial power supply cannot meet the requirements of the machine tool, and the industrial product of the variable frequency power supply is also called a frequency converter, so that the requirement of the variable frequency power supply cannot be met, therefore, the frequency converter can not be suitable for occasions needing the variable frequency power supply, and for the machine tool with low power supply requirement or the machine tool with a less complex control program, the cost performance of the product is usually emphasized, and the frequency converter is correspondingly suitable for the machine tool products.

Regarding the problem of the rotation distance or angle of the motor 4, since the CNC switch has a diameter of about 20 cm, a circumference of the CNC switch is about 62.8cm, and is divided into 12 parts, the distance is about 5 cm, that is, the distance of each movement of the magnetic base 11 is about 5 cm, or the rotating disc 3 can only rotate 30 degrees each time, the frequency conversion frequency range of the frequency converter is 1 to 400Hz, calculated according to 1Hz, and calculated by a 4-pole motor, is 1440 rpm, that is, 24 rpm, the frequency converter is adjusted to 1Hz, the rated frequency of the motor in our country is 50Hz, and when the frequency is adjusted to 1Hz, it is 0.48 rpm, if the belt rotation ratio is set to 1: 1, 1 second, the rotating disc 3 rotates almost 180 degrees, so the light is not realized by a frequency converter, namely, the motor 4 needs to be added with a speed reducer to adjust the rotating speed.

Claims

1. The utility model provides a CNC lathe switch which characterized by: the CNC machine tool switch mainly comprises a fixed disc A (1), a fixed disc B (2), a rotating disc (3), a motor (4), a belt (5), a binding post A (6), a screw cap A (7), a binding post B (8), a screw cap B (9), a copper sheet A (10), a magnetic seat (11) and a spring A (12), wherein an external power supply U, V, M utilizes a binding post T (210) to be locked through a screw cap C (201), the binding post T (210) is communicated with a copper sheet B (211), the copper sheet B (211) is contacted with a copper sheet V (314), the copper sheet C (307) is transmitted through a binding post (313), the copper sheet C (309) is transmitted through a binding post V (303), the copper sheet C (309) is transmitted to a brake block (311) and then to the copper sheet A (10), so far, the end of the external power supply U, V, M is transmitted to the U, V, M end of the copper sheet A (10), and the, the current cannot pass through, and at this time, the following two cases are described separately:

1.1) the motor (4) is controlled by a frequency converter, the motor (4) rotates, a rotating disc (3) is driven to rotate through a belt (5), a copper sheet A (10) and a magnetic seat (11) rotate along with the rotation, when the magnetic seat (11) falls into a positioning groove A (102), the motor (4) stops rotating, the positioning groove A (102) is a concave groove, the copper sheet A (10) is pressed downwards, when the pressure exceeds the elastic force of a spring B (208), a spring column B (209) descends along with the concave groove to be in contact with a terminal C (207), current is transmitted to a terminal C (207) from the copper sheet A (10) through the spring column B (209), and the terminal C (207) is connected to a terminal box of the motor to be controlled through a lead, so that the controlled motor starts to be powered on and starts to rotate;

1.2) when the motor (4) rotates again, the running resistance of the motor (4) overcomes the resistance of the spring A (12), because the positioning groove A (102) is a conical groove, the magnetic seat (11) leaves the position of the positioning groove A (102), the magnetic seat (11) lifts the position of the copper sheet A (10), the spring B (208) bounces the spring column B (209), the spring column B (209) is separated from the wiring terminal C (207), the current cannot be transmitted to the junction box of the motor to be controlled from the copper sheet A (10), and the circuit is disconnected.

2. The CNC machine switch according to claim 1, characterized in that: the fixing disc A (1) mainly comprises a PEN line hole (101), a first positioning groove (102), a double-column hole (103) and a second positioning groove (104), the fixing disc A (1) is of an annular structure, the lower edge of the inner side of the annular structure is provided with a flange, the flange is provided with a concave V-shaped first positioning groove (102) and a double-column hole (103), the PEN line hole (101) is arranged at the bottom of the first positioning groove (102), the first positioning groove (102) and the double-column hole (103) are distributed in a staggered mode, the second positioning groove (104) is distributed on the inner side of the annular structure,

two copper columns are arranged in the double-column hole (103), one of the two copper columns is connected to the copper sheet A (10), the other copper column is connected to the control circuit board, but the two copper columns are not connected, therefore, current cannot be transmitted to the control circuit board from the copper sheet A (10), when the magnetic base (11) runs along with the rotating disc (3), the magnetic base runs to the position of the double-column hole (103), the two copper columns are connected by the copper columns (112), the current is transmitted to the control circuit board from the copper sheet A (10), the control board obtains current information, a circuit of the motor (4) is disconnected, and the rotating disc (3) stops rotating,

the PEN wire is a commonly-known zero wire, the PEN wire hole (101) is positioned at the bottom of the first positioning groove (102) and used for installing the first wiring terminal (6), after the magnetic base (11) falls into the first positioning groove (102), the copper column (112) is in contact with the first wiring terminal (6), the first positioning groove (102) is a conical groove, so that the magnetic base (11) is conveniently lifted when the rotating disc (3) rotates, two holes are formed in the double-column hole (103) and used for arranging two copper columns, one of the two copper columns is connected to a power supply, and the other copper column is connected to an electromagnetic relay or a control circuit board; constant head tank second (104) and location strip first (205) cooperation, prevent that fixed disk first (1) from rotating in the outside of fixed disk second (2).

3. The CNC machine switch according to claim 1, characterized in that: the fixed disc B mainly comprises a screw cap C (201), a screw cap T (202), a machine foot (203), a cutter connecting frame hole (204), a positioning strip A (205), a central hole (206), a terminal C (207), a cutter connecting frame (2071), a spring B (208), a spring column B (209), a terminal D (210), a copper sheet B (211), a copper sheet groove B (212), a terminal hole A (213), a motor base (214) and a positioning strip B (215);

the screw cap C (201) is screwed on the terminal T (210), the screw cap T (202) is screwed on the terminal C (207), the terminal T (210) and the copper sheet B (211) are of an integral structure, the copper sheet B (211) is of a circular ring structure, the circular ring at the U, V, M end has size difference, the inner diameter and the outer diameter of the circular ring at the U, V, M end have corresponding relations with the inner diameter and the outer diameter of the copper sheet groove B (212), the terminal T (210) is inserted into the terminal post hole A (213), the screw cap C (201) locks the U, V, M end of a power supply to be wired on the fixed disc B (2), the terminal C (207) is inserted into the tool rest hole (204), the U, V, M end of the locking wire outlet end of the screw cap T (202) is wired on the fixed disc B (2), when the rotary one-way electric switch needs to be fixed, the machine foot (203) is changed into a structure playing a fixing role, and the central hole (206) is positioned at the center, the central hole (206) is used for inserting the central shaft of the rotating disc, and the front end of the central shaft is provided with a belt pulley groove (316).

4. The CNC machine switch according to claim 1, characterized in that: the rotating disc mainly comprises a wiring post hole B (301), a copper sheet groove C (302), a wiring post penta (303), a threaded hole A (304), a blind hole (305), a screw cap penta (306), a copper sheet C (307), a screw cap already (308), a copper sheet T (309), a screw rod A (310), a gate holder (311), a rivet (312), a wiring post already (313), a copper sheet penta (314), a copper sheet groove T (315), a pulley groove (316) and a positioning groove C (317),

the wiring column hole B (301) is positioned in a recessed groove of the copper sheet groove T (315), the wiring column hole B (301) is used for inserting a wiring column (313), the copper sheet groove C (302) is a recessed groove, one end of the copper sheet groove C (302) is the wiring column hole B (301), the other end of the copper sheet groove C is the wiring column E (303), the copper sheet C (307) is placed into the copper sheet groove C (302), the screw cap E (306) is used for screwing the wiring column into the wiring column E (313), the screw rod A (310) is screwed into the screw hole A (304), one end of the copper sheet T (309) is placed into the wiring column E (303), the other end of the copper sheet T (309) presses the gate seat (311), the screw cap (308) is screwed into the wiring column E (303) so as to press the copper sheet C (307) and the copper sheet T (309), the lower end of the gate seat (311) is inserted into the blind hole (305), the wiring column E (313) and the copper sheet V (314) are of an integral structure, the copper sheet, therefore, when the rotating disc (3) rotates, U, V, M ends of the copper sheet B (211) and the copper sheet V (314) respectively correspond to each other, the copper sheet B (211) and the copper sheet V (314) are ensured to respectively correspond to each other when the rotating disc (3) rotates, the copper sheet B (211) and the copper sheet V (314) both use the center hole (206) as the center of a circle, the running track of the rotating copper sheet V (314) is overlapped with the area of the stationary copper sheet B (211), and therefore the copper sheet B and the rotating disc can be ensured to be always in a contact state no.

5. The CNC machine switch according to claim 1, characterized in that:

the magnetic base (11) mainly comprises a copper sheet groove A (111), a copper column (112), a resistor (113) and a spring column A (114), wherein the copper sheet groove A (111) is used for inserting the copper sheet A (10), the magnetic base (11) is provided with two or three copper sheet grooves A (111) which respectively correspond to single-phase electricity and three-phase electricity, one end of the resistor (113) is connected with the copper sheet A (10), the other end of the resistor is connected with the copper column (112), only the magnetic base with a three-phase structure is provided with the resistor (113), the three resistors need the same relevant technical parameters, the lower end of the copper column (112) is positioned below a V-shaped structure of the magnetic base (11), the spring column A (114) is positioned above the magnetic base (11), the spring column A (114) is used for placing the spring A (12), the spring A (12) has the function that when the magnetic base (11) falls into a positioning groove A (102), the spring A (12) compresses the magnetic base (11), and the elasticity of the spring A (12) is greater than that, when the magnetic base (11) rotates to leave the positioning groove A (102), the spring A (12) contracts to ensure that the magnetic base (11) rotates smoothly.

6. The CNC machine switch according to claim 1, characterized in that:

the open-phase protection has two types, wherein one type is that a resistor is welded at the front end of a copper sheet nail (10), the rated resistance value of the U, V, M end is the same, the rated voltage value is required to be the same, the other ends of three resistors (113) are all connected to a copper column (112), when a magnetic seat (11) falls into a positioning groove nail (102), the copper column (112) is communicated with a binding post nail (6), the binding post nail (6) is connected with a circuit control board to provide an electric signal, when a circuit U, V, M supplies power normally, the copper column (112) is used as a PEN line, the PEN line is a well-known zero line, at the moment, the current of the copper column (112) is 0, the circuit control board does not act, when the U, V, M end has two phases or one phase is normal, at the moment, the current of the copper column (112) is not 0 any more, the;

the other method is that an electromagnetic relay is directly used for open-phase protection, a proper resistor (113) is selected according to the rated voltage of the electromagnetic relay through the voltage reduction effect of the resistor (113), the copper column (112) has no current when the electromagnetic relay does not work because of normal operation, and when the electromagnetic relay works in an open-phase mode, the copper column (112) has current to pass through, the electromagnetic relay acts to cut off a power supply, so that the open-phase operation of the motor is prevented.

7. The CNC machine switch according to claim 1, characterized in that:

the stroke control means that a circuit from a W end to the electromagnetic relay is controlled by a double-column hole (103), two copper columns are installed in the double-column hole (103), one of the two copper columns is connected to the copper sheet A (10), the other copper column is connected to the control circuit board, but the two copper columns are not connected, the copper column (112) is not connected with the two copper columns of the double-column hole (103), the electromagnetic relay cannot work, a loop is formed at the position A, B, the MOTOR2 can work, when the copper column (112) connects the two copper columns with the circuit, the electromagnetic relay works, the position A, B is disconnected, the loop cannot be formed, and the MOTOR2 stops running.