CN111376095A - Automatic tool changing mechanism of machine tool and control method thereof - Google Patents
Automatic tool changing mechanism of machine tool and control method thereof Download PDFInfo
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- CN111376095A CN111376095A CN201811608862.7A CN201811608862A CN111376095A CN 111376095 A CN111376095 A CN 111376095A CN 201811608862 A CN201811608862 A CN 201811608862A CN 111376095 A CN111376095 A CN 111376095A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
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Abstract
An automatic tool changing mechanism of a machine tool and a control method thereof are provided, the automatic tool changing mechanism comprises: a base; the cutter head is combined on the base and is provided with a plurality of cutter sleeves; a cutter head motor controlled to drive the cutter head to rotate; the cutter changing arm is arranged on one side of the cutter head; a tool changing motor controlled to drive the tool changing arm to rotate; a broach structure for driving one of the knife sleeves to swing between a first position and a second position; a host controller for issuing a first command and a second command; and the frequency converter is used for receiving the first command and the second command, outputting a first control signal to the cutter head motor corresponding to the first command, and outputting a second control signal to the cutter head motor corresponding to the second command. Thereby executing the tool changing operation and reducing the occurrence probability of failure.
Description
Technical Field
The invention relates to a tool changing system of a machine tool; in particular to an automatic tool changing mechanism of a machine tool and a control method.
Background
The automatic tool changing mechanism of the existing machine tool adopts two groups of induction motors to drive a cutter head or a cutter changing arm to rotate respectively. However, the use of the brake is prone to cause the positioning of the rotating cutter head or the rotating changing arm to be not reliable due to wear, which is troublesome in vain.
In order to improve the above-mentioned brake loss, a new patent technology of taiwan publication No. M470720 is developed. The patent discloses using a frequency converter and two relays to drive a knife compartment (or referred to as a cutter head) motor or an automatic knife-changing mechanism motor to operate, respectively, so as to control the rotation of the knife compartment or the knife-changing arm. Although the technology of the patent avoids the defects derived from the use of a brake, the switching structure of the relay still belongs to the mechanical actuation principle. Therefore, when the relays are used to switch the connection between the frequency converter and the knife compartment motor or between the frequency converter and the automatic knife changing mechanism motor, the relays are still likely to be damaged or poorly sensed after long-term switching, so that the control signal output by the frequency converter is interfered by noise and the control fails. Therefore, the technology of the patent is still perfected.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an automatic tool changer for a machine tool and a control method thereof, in which a frequency converter directly controls a cutter motor and a tool changing motor to reduce noise interference during signal transmission, so as to have an effect of performing control accurately, reduce occurrence of failure, and improve convenience of use.
In order to achieve the above object, the present invention provides an automatic tool changing mechanism for a machine tool, comprising: a base; the cutter head is combined on the base and is provided with a plurality of cutter sleeves; a cutter head motor controlled to drive the cutter head to rotate; the cutter changing arm is arranged on one side of the cutter head; a tool changing motor controlled to drive the tool changing arm to rotate; a broach structure for driving one of the knife sleeves to swing between a first position and a second position; a host controller for issuing a first command and a second command; the frequency converter is electrically connected with the cutter motor, the cutter changing motor and the upper controller and is provided with a command input port and a command output port, and the command input port is electrically connected with the upper controller and used for receiving the first command and the second command; the command output port is electrically connected with the cutter motor and the cutter changing motor; the frequency converter outputs a first control signal to the cutter motor corresponding to the first command so as to drive the cutter to rotate; the frequency converter outputs a second control signal to the tool changing motor corresponding to the second command to drive the tool changing arm to rotate.
In order to achieve the above object, the present invention provides a method for controlling an automatic tool changer of a machine tool, the automatic tool changer including: the cutter head is provided with a plurality of cutter sleeves; a cutter head motor controlled to drive the cutter head to rotate; the cutter changing arm is arranged on one side of the cutter head; a tool changing motor controlled to drive the tool changing arm to rotate; a broach structure for driving one of the knife sleeves to swing between a first position and a second position; an upper controller; the frequency converter is electrically connected with the cutter motor, the cutter changing motor and the upper controller; a knife sleeve position detector for detecting the position state of the knife sleeve, and sending a first detection signal when the knife sleeve is positioned at the first position, and sending a second detection signal when the knife sleeve is positioned at the second position; the control method comprises the following steps: the upper controller judges whether the first detection signal is received or not before sending a first command to the frequency converter, if the upper controller receives the first detection signal, the first command is output, and if the upper controller does not receive the first detection signal, the first command is not output; when the frequency converter receives the first command, a first control signal is correspondingly output to the cutter motor so as to drive the cutter to rotate.
The invention has the advantages that the design of directly transmitting the control signal to the cutter motor or the cutter changing motor through the frequency converter can effectively reduce the noise interference influence during the transmission of the control signal.
Drawings
Fig. 1 and 2 are perspective views illustrating an automatic tool changing mechanism of a machine tool according to an embodiment of the present invention;
FIG. 3 is a front view illustrating the first detector of the present embodiment detecting the movable rod;
FIG. 4 is a front view illustrating the second detector detecting the movable rod according to the present embodiment;
FIG. 5 is a schematic view illustrating the structure of the automatic tool changer of the machine tool according to the present embodiment;
fig. 6 to 9 are flowcharts of the control method of the present embodiment.
[ notation ] to show
[ invention ]
Automatic tool changing mechanism of 100 machine tool
10 base
12a cutter head
14 cutter head motor
16 transmission structure
18a movable rod of broach structure
20 tool changing arm
22 tool changing motor
24 upper controller 25 control box
26 frequency converter 27 box
26a command input port 26b command output port 26c Power input port
26d cutter sleeve position signal input port 26e cutter changing arm position input port
28 first detector 30 second detector
32 signal wheel 34 detection switch
1,2,3,4 terminal
E commercial power
OUT 1A first output terminal OUT 2A second output terminal
S1 first detection signal S2 second detection signal
S3 third detection signal
P1 first position P2 second position
P3 third position P4 fourth position
Detailed Description
In order to more clearly illustrate the present invention, an embodiment will be described in detail with reference to the accompanying drawings. Referring to fig. 1 to 5, an automatic tool changing mechanism 100 of a machine tool according to an embodiment of the present invention includes: a base 10, a cutter head 12, a cutter head motor 14, a broaching structure 18, a cutter changing arm 20, a cutter changing motor 22, an upper controller 24 and a frequency converter 26.
The base 10 may be assembled to a frame (not shown). The cutter 12 is combined on the base 10 and driven by a cutter motor 14 to rotate relative to the base 10, and the cutter 12 is provided with a plurality of cutter sleeves 12a, in this embodiment, the cutter further comprises a transmission structure 16 arranged on the base 10, and the cutter motor 14 drives the transmission structure 16 to drive the cutter 12 to rotate; the cutter sleeves 12a are arranged at intervals along the periphery of the cutter head 12, and each cutter sleeve 12a can be combined with a cutter (not shown).
As shown in fig. 3 and 4, the knife sleeve 12a located at the bottom edge of the cutter head 12 is driven by the broach structure 18 disposed on the base 10 to pivot between a first position P1 and a second position P2, the knife sleeve 12a is located at the standby position when located at the first position P1 to receive a knife, and the knife sleeve 12a is located at the knife changing position when located at the second position P2 to prepare for changing the knife, for example, the knife can be taken out from the knife sleeve 12a or put into the knife sleeve 12 a. In the present embodiment, since the cutter head 12 is vertically disposed and each of the knife sets 12a is disposed perpendicular to the disk surface of the cutter head 12, the knife sets 12a are in a horizontal state when they are located at the first position P1; when the knife pouch 12a is in the second position P2, it is in a vertical position. However, in other applications, for example, when the cutter head is horizontally disposed and the knife pouch is disposed perpendicular to the disk surface of the cutter head, the knife pouch may also be in a vertical state when the knife pouch is located at the first position, and may also be in a horizontal state when the knife pouch is located at the second position, which is not limited to the above description.
Further, in the present embodiment, the broach structure 18 includes a movable rod 18a, the movable rod 18a drives the sheath 12a to swing between the first position P1 and the second position P2, and can reciprocate between a third position P3 shown in fig. 3 and a fourth position P4 shown in fig. 4.
The tool changing arm 20 is disposed at one side of the cutter head 12 and disposed at the rear of the base 10 together with the tool changing motor 22, and the tool changing arm 20 is connected to the tool changing motor 22 and driven by the tool changing motor 22 to rotate for tool changing operation.
The upper controller 24 is electrically connected to the frequency converter 26, and the upper controller 24 is configured to issue a first command and a second command to the frequency converter 26. In this embodiment, the upper controller 24 is disposed in a control box 25, and the upper controller 24 may be, but is not limited to, a PLC.
The frequency converter 26 is electrically connected to the cutter motor 14, the tool-changing motor 22 and the upper controller 24, and the frequency converter 26 has a command input port 26a and a command output port 26b, the command input port 26a is connected to the upper controller 24 for receiving the first command and the second command, and the command output port 26b is electrically connected to the cutter motor 14 and the tool-changing motor 22. The frequency converter 26 outputs a first control signal to the cutter motor 14 corresponding to the first command to drive the cutter 12 to rotate; and outputting a second control signal to the tool changing motor 22 in response to the second command to drive the tool changing arm 20 to rotate. In the embodiment, the frequency converter 26 is disposed in a casing 27, and the casing 27 is adjacent to the cutter motor 14, and in other applications, the frequency converter 26 may be disposed at other positions, and is not limited to be disposed in the casing 27.
In the present embodiment, the command input port 26a includes terminals 1,2,3, and 4, where the terminal 1 is used for inputting a command for controlling the cutter head 12 to rotate forward in the first command, the terminal 2 is used for inputting a command for controlling the cutter head 12 to rotate backward in the first command, the terminal 3 is used for inputting a command for controlling the cutter arm 20 to rotate forward in the second command, and the terminal 4 is used for inputting a command for controlling the cutter arm 20 to rotate backward in the second command.
Further, the frequency converter 26 further includes a power input port 26c, the power input port 26c is connected to an external power source for receiving an electric energy from the external power source, for example, in the embodiment, the power input port 26c is connected to a commercial power E, and the frequency converter 26 can receive the commercial power E and output a control signal with a specific frequency to the cutter motor 14 and the cutter changing motor 22 through the command output port 26 b.
In this embodiment, the command output port 26b includes a first output terminal OUT1 and a second output terminal OUT2, the first output terminal OUT1 is connected to the deck motor 14, the frequency converter 26 outputs a first control signal to the deck motor 14 through the first output terminal OUT1 when receiving the first command, so as to drive the deck 12 to rotate, and outputs a second control signal to the tool changing motor 22 through the second output terminal OUT2 when receiving the second command, so as to drive the tool changing arm 20 to rotate. Further, in this embodiment, the output voltages of the first control signal and the second control signal are higher than the voltage of the utility power E.
Through the above design, the automatic tool changer 100 of the machine tool of the present invention can directly transmit the control signal to the cutter motor or the tool changer motor through the frequency converter 26, so as to effectively reduce the noise interference effect when transmitting the control signal, thereby improving the accuracy of signal transmission.
In addition, in an embodiment, the automatic tool changer 100 further includes a tool sleeve position detector electrically connected to the upper controller 24 and the frequency converter 26, the tool sleeve position detector is used to detect the position state of the tool sleeve 12a, and send a first detection signal S1 when the tool sleeve 12a is located at the first position P1, and send a second detection signal when the tool sleeve 12a is located at the second position P2. In this embodiment, the tool sleeve position detector includes a first detector 28 and a second detector 30, the first detector 28 and the second detector 30 are disposed on the front side of the base 10 and adjacent to the movable rod 18a, in this embodiment, the first detector 28 and the second detector 30 may be but are not limited to optical sensors, please refer to fig. 3, the first detector 28 generates a first detection signal S1 when the tool sleeve 12a is located at the first position P1, that is, when the movable rod 18a of the broach structure 18 is located at the third position P3; as shown in fig. 4, when the second detector 30 is driven by the broach structure 18 to pivot to the inverted second position P2, the second detector 30 detects the movable rod 18a moving up to the fourth position P4 and generates a second detection signal S2.
Referring to fig. 5, in an embodiment, the upper controller 24 is electrically connected to the first detector 28 and the second detector 30 for receiving the first detection signal S1 and the second detection signal S2; the frequency converter 26 has a bushing position signal input port 26d electrically connected to the first detector 28 and the second detector 30 for receiving the first detecting signal S1 and the second detecting signal S2.
Referring to fig. 6 to 8, the method for controlling an automatic tool changer of a machine tool of the present embodiment includes the following steps:
first, before upper controller 24 sends the first command to frequency converter 26, it is determined whether first detection signal S1 is received, if upper controller 24 receives first detection signal S1, the first command is output, and if upper controller 24 does not receive first detection signal S1, the first command is not output.
Then, if the frequency converter 26 receives the first command, it correspondingly outputs a first control signal to the cutter motor 14 to drive the cutter 12 to rotate.
Further, when the frequency converter 26 receives the first command or outputs the first control signal, it is further determined whether the frequency converter 26 receives the first detection signal S1, if the frequency converter 26 receives the first detection signal S1, the cutter motor 14 is controlled to operate at a first speed, and if the frequency converter does not receive the first detection signal S1, the cutter motor 14 is controlled to operate at a second speed, wherein the first speed is higher than the second speed. In the present embodiment, when the frequency converter 26 receives the first detecting signal S1, the frequency converter 26 outputs a first control signal with a higher frequency to the deck motor 14, so that the deck motor 14 operates at a first speed with a higher speed; when the frequency converter 26 does not receive the first detection signal S1, the frequency converter 26 outputs a first control signal with a lower frequency to the deck motor 14, so that the deck motor 14 operates at a second lower speed.
Then, when the cutter motor 14 drives the cutter 12 to rotate to the positioning position at the first speed, the upper controller 24 issues a first stop command to the frequency converter 26, and when the frequency converter 26 receives the first stop command, a control signal is outputted to control the cutter motor 14 to stop operating. In addition, when the cutter head motor 14 drives the cutter head 12 to rotate at the second speed, whether the cutter sleeve 12a is in the horizontal state (the first position P1) is further detected and judged, for example, the frequency converter 26 can detect whether the first detection signal S1 is received, if so, it indicates that the knife sheath 12a is at the first position P1 (horizontal state), or the cutter sleeve 12a is normally operated to the first position, and then the frequency converter 14 will continuously detect whether the cutter head motor 14 is normally operated, for example, by determining whether the operation time of the deck motor 14 exceeds a warning value, and if so, if the operation of the cutter head motor 14 is abnormal for a long time, the frequency converter 26 will send out an alarm message, the alarm message may notify upper controller 24, and when upper controller 24 receives the alarm message, sending a first stop command to the frequency converter 26, so that the frequency converter 26 controls the cutterhead motor 14 to stop running; in addition, in one embodiment, the alarm message can be reported to the maintenance personnel together for subsequent troubleshooting; in addition, in an embodiment, when the frequency converter 26 sends out the alarm message, the upper controller 24 is not informed and the cutterhead motor 14 is controlled to stop operating, or in an embodiment, the upper controller 24 is informed and the cutterhead motor 14 is controlled to stop operating.
In addition, when the cutter head 12 is rotated to the fixed position under normal operation, for example, the cutter head 12 is controlled to rotate to the fixed position within the preset operation time of the cutter head motor 14, and the operation time does not exceed the warning value, the upper controller 24 issues a first stop command to the frequency converter 26, and when the frequency converter 26 receives the first stop command, a control signal is correspondingly output to control the cutter head motor 14 to stop operating. In addition, when the cutter sleeve 12a is not in the horizontal state, the cutter motor 14 is controlled to stop, and the cutter motor 14 is notified of the jamming stop abnormality.
In one embodiment, the tool holder position detector preferably sends the first detection signal S1 to the upper controller 24 and the frequency converter 26 at the same time. Through the above design, when the upper controller 24 issues the first command to control the rotation of the cutter head motor 14, the frequency converter 26 further determines the position state of the cutter sleeve, and controls the operation speed of the cutter head motor 14 according to whether the frequency converter 26 receives the first detection signal S1, so as to effectively reduce the risk of misoperation when the command or signal is lost. For example, when the cutter head 12 is controlled to rotate, if the position of the cutter sleeve 12a is abnormal, so that the cutter sleeve position detector will not send out the first detection signal S1, at this time, even if the frequency converter 26 has received the first command and is about to control the operation of the cutter motor 14, because the frequency converter 26 will further receive the signal of the cutter sleeve position detector to determine the operation speed of the cutter motor 14 to be controlled, because the frequency converter 26 does not receive the first detection signal S1, it will control the operation of the cutter motor 14 at the second speed, which is relatively low, therefore, the cutter head 12 will rotate at a relatively slow speed, and if the cutter sleeve 12a has been returned to the first position P1 during this time, the frequency converter 26 can receive the first detection signal S1, and can control the operation of the cutter head 12 at the first speed, and if the cutter sleeve 12a has not returned to the first position P1, it will collide with other elements of the machine tool, it is also possible to brake instantaneously because the cutter head 12 is operated at a lower speed, so that the risk of damage to the sleeve or other elements can be reduced.
When the upper controller 24 receives the second sensing signal S2, it indicates that the selected tool holder 12a is driven by the tension tool structure 18 to move to the second position P2 to be ready for tool changing, at this time, the upper controller 24 can output a second command to the frequency converter 26, and the frequency converter 26 outputs a second control signal to the tool changing motor 22 corresponding to the second command to drive the tool changing arm 20 to rotate to perform the tool changing operation.
In addition, as shown in fig. 5, in an embodiment, the automatic tool changer 100 further includes a signal wheel 32 and a detecting switch 34, the signal wheel 32 changes the rotation angle along with the rotation of the tool changer arm 20, and the detecting switch 34 detects the rotation angle of the signal wheel 32 and generates a third detecting signal S3. In the present embodiment, the detecting switch 34 is electrically connected to the upper controller 24 and the frequency converter 26, and can output the third detecting signal S3 to the upper controller 24 and the frequency converter 26. The frequency converter 26 has a tool-changing arm position input port 26e connected to the detecting switch 34 for receiving the third detecting signal S3.
Referring to fig. 9, when the inverter 26 receives the second command, the operating speed of the tool changing motor is determined based on whether the third detection signal S3 is received, when the inverter 26 receives the third detection signal S3, the tool changing motor 22 is controlled to operate at a third speed, and when the inverter 26 does not receive the third detection signal S3, the tool changing motor 22 is controlled to operate at a fourth speed, wherein the third speed is higher than the fourth speed. In this embodiment, when the frequency converter 26 receives the third detecting signal S3, the frequency converter 26 outputs a second control signal with a higher frequency to the tool-changing motor 22, so that the tool-changing motor 22 operates at a higher third speed; when the frequency converter 26 does not receive the third detection signal S3, the frequency converter 26 outputs a second control signal with a lower frequency to the cutter motor 14, so that the cutter changing motor 22 operates at a fourth speed with a lower speed.
In addition, in an embodiment, when upper controller 24 does not receive third detector signal S3, for example, when the state of receiving third detector signal S3 is changed to the state of not receiving third detector signal S3, upper controller 24 does not output the second command or stops outputting the second command. Further, in one embodiment, the upper controller 24 further notifies the inverter 26 so that the inverter 26 controls the tool changing motor 22 to operate at the fourth speed until the command issued by the upper controller 24 to the inverter 26 is stopped.
Through the above design, when the upper controller 24 issues the second command to control the rotation of the tool-changing motor 22, the frequency converter 26 further determines the position state of the tool-changing arm 20, and controls the speed of the tool-changing motor 22 according to whether the frequency converter 26 receives the third detection signal S3, so as to effectively reduce the risk of misoperation when the command or signal is lost. That is, when the inverter 26 receives the third detection signal S3, the position of the tool changer 20 can be effectively grasped, and the rotation of the tool changer 20 can be controlled at the third speed, which is relatively high, whereas when the inverter 26 does not receive the third detection signal S3, the rotation of the tool changer 20 is controlled at the fourth speed, which is relatively low.
Through the design, the control method of the invention can confirm the position of the cutter sleeve and the position of the cutter changing arm by the upper controller and the frequency converter, and through the mechanism, even if the upper controller sends a command to the frequency converter, if the detection signal is lost, the frequency converter can still drive the cutter disc motor and the cutter changing motor to operate, and the cutter changing operation is carried out in a mode of lower-speed operation.
The above description is only for the purpose of illustrating the present invention and the appended claims are to be construed as broadly as possible and equivalents thereof.
Claims (12)
1. An automatic tool changing mechanism of a machine tool, characterized in that it comprises:
a base;
the cutter head is combined on the base and is provided with a plurality of cutter sleeves;
a cutter head motor controlled to drive the cutter head to rotate;
the cutter changing arm is arranged on one side of the cutter head;
a tool changing motor controlled to drive the tool changing arm to rotate;
a broach structure for driving one of the knife sleeves to swing between a first position and a second position;
a host controller for issuing a first command and a second command;
the frequency converter is electrically connected with the cutter motor, the cutter changing motor and the upper controller and is provided with a command input port and a command output port, and the command input port is electrically connected with the upper controller and used for receiving the first command and the second command; the command output port is electrically connected with the cutter motor and the cutter changing motor; the frequency converter outputs a first control signal to the cutter motor corresponding to the first command so as to drive the cutter to rotate; the frequency converter outputs a second control signal to the tool changing motor corresponding to the second command to drive the tool changing arm to rotate.
2. The automatic tool changing mechanism of a machine tool according to claim 1, further comprising a tool sheath position detector for detecting a position state of the tool sheath, and for emitting a first detection signal when the tool sheath is at the first position, and for emitting a second detection signal when the tool sheath is at the second position; the upper controller is electrically connected with the cutter sleeve position detector and is used for receiving the first detection signal and the second detection signal, outputting the first command if the upper controller receives the first detection signal, and not outputting the first command if the upper controller does not receive the first detection signal.
3. The automatic tool changer of claim 2, wherein the transducer is electrically connected to the tool holder position detector for receiving the first detection signal, and when the transducer receives the first command, the transducer determines whether the first detection signal is received, and if the first detection signal is received, the transducer controls the cutter motor to operate at a first speed, and if the first detection signal is not received, the transducer controls the cutter motor to operate at a second speed, wherein the first speed is higher than the second speed.
4. The automatic tool changing mechanism of claim 3, wherein after the cutterhead motor is controlled to operate at the second speed, and after the upper controller receives the first detection signal, if the upper controller issues a first stop command to the frequency converter or the frequency converter issues an alarm message, the cutterhead motor is controlled to stop operating.
5. The automatic tool changing mechanism of a machine tool of claim 1, further comprising a signal wheel and a detecting switch, wherein the signal wheel changes the rotation angle with the rotation of the tool changing arm, and the detecting switch detects the rotation angle of the signal wheel and generates a third detecting signal; the upper controller is connected with the detection switch and is used for receiving the third detection signal.
6. The automatic tool changing mechanism of a machine tool of claim 5, wherein the transducer is electrically connected to the sensing switch for receiving the third sensing signal; when the frequency converter receives the second command, whether the third detection signal is received or not is judged, if the third detection signal is received, the tool changing motor is controlled to operate at a third speed, and if the third detection signal is not received, the tool changing motor is controlled to operate at a fourth speed, wherein the third speed is higher than the fourth speed.
7. A control method of an automatic tool changing mechanism of a machine tool is characterized in that the automatic tool changing mechanism comprises: the cutter head is provided with a plurality of cutter sleeves; a cutter head motor controlled to drive the cutter head to rotate; the cutter changing arm is arranged on one side of the cutter head; a tool changing motor controlled to drive the tool changing arm to rotate; a broach structure for driving one of the knife sleeves to swing between a first position and a second position; an upper controller; the frequency converter is electrically connected with the cutter motor, the cutter changing motor and the upper controller; a knife sleeve position detector for detecting the position state of the knife sleeve, and sending a first detection signal when the knife sleeve is positioned at the first position, and sending a second detection signal when the knife sleeve is positioned at the second position; the control method comprises the following steps:
A. the upper controller judges whether the first detection signal is received or not before sending a first command to the frequency converter, if the upper controller receives the first detection signal, the first command is output, and if the upper controller does not receive the first detection signal, the first command is not output;
B. when the frequency converter receives the first command, a first control signal is correspondingly output to the cutter motor so as to drive the cutter to rotate.
8. The control method according to claim 7, further comprising:
C. when the frequency converter receives the first command, whether the first detection signal is received or not is judged, if the frequency converter receives the first detection signal, the cutter motor is controlled to operate at a first speed, and if the frequency converter does not receive the first detection signal, the cutter motor is controlled to operate at a second speed, wherein the first speed is higher than the second speed.
9. The control method according to claim 8, further comprising:
D. after the cutter motor is controlled to run at the second speed, and after the upper controller receives the first detection signal, if the upper controller sends a first stop command to the frequency converter or the frequency converter sends an alarm message, the frequency converter controls the cutter motor to stop running.
10. The control method as claimed in claim 8, wherein the tool holder position detector sends the first detection signal to the upper controller and the frequency converter simultaneously.
11. The control method according to claim 7, wherein the automatic tool changer includes a signal wheel and a detecting switch, the signal wheel changes the rotation angle with the rotation of the tool changing arm, the detecting switch detects the rotation angle of the signal wheel and generates a third detecting signal; the control method also comprises the following steps:
when the upper controller receives the third detection signal, it outputs a second command to the frequency converter;
when the frequency converter receives the second command, a second control signal is correspondingly output to the tool changing motor so as to control the tool changing arm to rotate.
12. The control method according to claim 11, further comprising the steps of:
when the frequency converter receives the second command, whether the third detection signal is received or not is judged, if the third detection signal is received, the tool changing motor is controlled to operate at a third speed, and if the third detection signal is not received, the tool changing motor is controlled to operate at a fourth speed, wherein the third speed is higher than the fourth speed.
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| CN201811608862.7A CN111376095B (en) | 2018-12-27 | 2018-12-27 | Automatic tool changing mechanism of machine tool and control method thereof |
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| CN201811608862.7A CN111376095B (en) | 2018-12-27 | 2018-12-27 | Automatic tool changing mechanism of machine tool and control method thereof |
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