JPH0910959A - Tip dresser and controller therefor - Google Patents

Abstract

PURPOSE: To improve work efficiency by providing a tip dresser and controller therefor suitable for a welding equipment such as a welding robot. CONSTITUTION: The tip dresser system is equipped with a dresser main body 2 with a motor which is a drive source revolving and driving a blade tool for grinding the electrode tips 1a and 1b of the upper gun 1A and the lower gun 1B of a welder, a controller 3 performing a control necessary when grinding the electrode tips 1a and 1b, and a pressure drive system 4 for pressing the dresser main body 2 with a prescribed pressurizing force by the electrode tips 1a and 1b at the time of dressing while being controlled by the controller 3. A pressurizing signal of 1 to 3 channel, etc., for authorizing manual dressing from a master sequencer 5 is inputted in the controller 3, and a motor abnormality signal, etc., is outputted from the controller 3 to the master sequencer 5. Further, a weld pressurizing signal from the welding timer 6 of the welder is inputted in the controller 3, and after providing an interlock with a dressing pressurizing signal, the weld pressurizing signal is outputted from the controller 3 to a pressurizing solenoid valve 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip dresser and its controller, and more particularly to a tip dresser for dressing (polishing) an electrode tip of a welding robot such as a stationary spot welding machine and a multi-spot welding machine and its controller.

[0002]

2. Description of the Related Art In a spot welding machine such as a stationary spot welding machine and a multi-spot welding machine, the welding quality cannot be ensured if the shape of the electrode tip is deformed due to abrasion of the electrode tip due to repeated pressurization and energization. A tip dresser for polishing the electrode tip is used.

As a conventional chip dresser, for example, as disclosed in Japanese Patent Application Laid-Open No. 1-181985,
A moving body is supported to be lifted up and down on a frame fixed on a base, the dresser body is fixed to this moving body, and a cutter blade that is driven to rotate by an air motor is attached to this dresser body. A stationary tip dresser in which a cutter blade is rotated by an air motor while the electrode tip is pressed to polish the electrode tip is known.

[0004]

However, in the above-mentioned conventional tip dresser, one stationary type dresser has to be installed correspondingly to one welding machine, so that it is particularly necessary for a welding robot. There is a problem that it is difficult to apply it to various welding equipment.

The present invention has been made in view of the above points, and an object of the present invention is to provide a tip dresser and a controller thereof that can be applied to welding equipment such as various welding robots.

[0006]

In order to solve the above problems, a tip dresser according to claim 1 is a dresser body having a drive source for driving a cutting tool for polishing an electrode tip of a welding machine, and a dresser body which is different from the dresser body. The body receives a dress start command from the main control device for controlling the welder, controls the pressurization / non-pressurization and the pressurization of the dresser body by the electrode tip of the welder, and at the same time, controls the pressure of the dresser body. The controller is configured to drive and control the drive source.

A chip dresser according to a second aspect of the present invention is the chip dresser according to the first aspect, wherein the controller is provided with means for validating the dress start command only when power is supplied from the main controller. And

A tip dresser controller according to a third aspect of the present invention is separate from a dresser main body having a drive source for driving a blade tool for polishing an electrode tip of a welding machine, and is a dress from a main control device for controlling the welding machine. A start input accepting means for receiving a start command and outputting a start signal, and controlling pressurization / non-pressurization and pressurizing force of the dresser body by the electrode tip of the welding machine according to the start signal from the start input accepting means. And a drive source control unit for controlling the drive of the drive source of the dresser body in response to a start signal from the start input receiving unit.

A chip dresser controller according to a fourth aspect is the controller according to the third aspect, wherein the pressurizing control means is a timing signal corresponding to a predetermined pressurizing pattern based on a start signal from the start input receiving means. A timing generating means for generating and outputting, a dressing pressure setting means for setting a pressing force of the dresser body by the electrode tip according to a timing signal from the timing generating means, and a starting signal and timing from the starting input receiving means. It is configured to include a switching unit that controls switching between pressurization / non-pressurization of the dresser main body by the electrode tip according to a timing signal from the generation unit.

The controller of the chip dresser according to a fifth aspect is the controller according to the third or fourth aspect, wherein the drive source control means delays the activation signal from the activation input acceptance means by a predetermined time, and the delay means. The driving source switching means for switching between driving and non-driving the driving source of the dresser main body in accordance with the start signal delayed by.

A controller of a chip dresser according to a sixth aspect of the present invention is the controller according to any one of the third to fifth aspects, wherein the activation input acceptance means also includes means for accepting a dress activation command by a manual operation and outputting the activation signal. The configuration is provided.

A controller of a chip dresser according to a seventh aspect is the controller according to any one of the third to sixth aspects, in which the activation input acceptance means validates the dress activation command only when power is supplied from the main control device. It is configured to include means for changing.

The controller of the chip dresser according to an eighth aspect is the controller according to the sixth aspect, wherein the activation input acceptance means starts the dress by the manual operation only when the manual dressing permission is given from the main control device. The configuration is provided with means for validating the command.

A controller of a tip dresser according to a ninth aspect is the controller according to any of the third to eighth aspects, further comprising welding timer interlock means for interlocking with a welding timer of the welding machine. And

A tip dresser controller according to a tenth aspect of the present invention is the controller according to any one of the third to ninth aspects, further comprising welding pressure setting means for setting a welding pressure according to a selection signal from the main controller. It has a structure.

[0016]

A tip dresser according to claim 1 has a dresser body having a driving source for driving a cutting tool for polishing an electrode tip of a welding machine, and a pressurizing / non-pressurizing and pressurizing force of the dresser body by the electrode tip of the welding machine. In addition to controlling, the controller that drives and controls the drive source of the dresser body is a separate body, so that the main controller that controls the welding machine can give a dress start command to this controller.
The tip dresser itself can be downsized and can be incorporated as part of a welding line, and a tip dresser that can be applied to welding equipment such as various welding robots can be obtained.

The tip dresser according to claim 2 is the tip dresser according to claim 1, further comprising means for validating the dress start command only when the controller is supplied with power from the main controller. The controller can be driven directly from, and is not affected by noise or the like.

The controller of the tip dresser according to claim 3 is separate from the dresser main body having a drive source for driving the cutting tool for polishing the electrode tip of the welding machine, and dress activation from the main control device for controlling the welding machine. Start input receiving means for receiving a command and outputting a start signal, and pressurization for controlling pressurization / non-pressurization and pressurization of the dresser body by the electrode tip of the welding machine according to the start signal from the start input receiving means. Since the control means and the drive source control means for driving and controlling the drive source of the dresser body in accordance with the start signal from the start input receiving means are provided, it becomes possible to incorporate the tip dresser as a part of the welding line. It is possible to obtain a tip dresser that can be applied to welding equipment such as various welding robots.

In the controller of the chip dresser according to a fourth aspect, in the controller according to the third aspect, the pressurizing control means generates a timing signal according to a predetermined pressurizing pattern based on the activation signal from the activation input receiving means. Timing generating means for outputting, dressing pressure setting means for setting the pressing force of the dresser main body by the electrode tip according to the timing signal from this timing generating means, starting signal from the starting input receiving means and timing from the timing generating means Since there is provided switching means for switching between pressurizing and non-pressurizing the dresser main body by the electrode tip according to the signal, it is possible to automatically perform dressing with a predetermined timing pattern by outputting a start signal. it can.

In the controller of the chip dresser according to a fifth aspect of the present invention, in the controller according to the third or fourth aspect, the drive source control means predetermines the end point of the activation signal based on the activation signal from the activation input acceptance means. Since the delay means for outputting the motor drive signal delayed by a predetermined time and the drive source switching means for switching the drive / non-drive of the drive source of the dresser body in accordance with the motor drive signal from the delay means are provided, Even if there is a delay in the response of the air that operates the electrode tip, this can be compensated for.

A chip dresser controller according to a sixth aspect of the present invention is the controller according to any one of the third to fifth aspects, wherein the activation input acceptance means further comprises means for accepting a dress activation command by a manual operation and outputting a activation signal. You can choose between automatic and manual dresses.

A chip dresser controller according to a seventh aspect of the present invention is the controller according to any one of the third to sixth aspects, wherein the means for validating the dress start command is provided only when the start input receiving means is powered by the main control device. As a result, the main controller can control the controller and is less susceptible to noise and the like.

In the controller of the chip dresser according to claim 8, in the controller according to claim 6, the dress start command by the manual operation is effective only when the start input accepting means is given the manual dress permission from the main controller. Since it has a means to do so, the conflict between the automatic dress and the manual dress can be avoided.

The controller of the tip dresser according to claim 9 is the controller according to any one of claims 3 to 8, further comprising welding timer interlock means for interlocking with the welding timer of the welding machine. The controller itself can interlock with the welding timer.

Since the controller of the tip dresser according to claim 10 is the controller according to any one of claims 3 to 9 above, it further comprises a welding pressure setting means for setting a welding pressure controllable by the main controller. The welding pressure of the welding machine can be selected.

[0026]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is an overall system configuration diagram showing an embodiment of the present invention, FIG. 2 is a block diagram of a controller, FIG. 3 is an input interlock circuit of FIG. 2, a part of the input interface circuit, a malfunction prevention circuit, and a welding timer interlock. FIG. 4 is a circuit diagram showing details of a part of the circuit, FIG. 4 is a circuit diagram showing details of the motor rotation delay circuit and motor switching circuit of FIG. 2, and FIG. 5 is a circuit diagram showing details of the timing generation circuit of FIG. 6 is a circuit diagram showing details of the interface circuit, tip dress pressure setting circuit and welding pressure setting circuit of FIG. 2, FIG. 7 is a circuit diagram showing details of the rest of the welding timer interlock circuit and the interface circuit, etc. FIG. 3 is an external view of the controller.

This tip dresser system includes a dresser body 2 having a motor as a drive source for rotationally driving a blade tool for polishing the electrode tips 1a and 1b of the upper gun 1A and the lower gun 1B of a welding machine (welding robot). , A controller 3 which is separate from the dresser main body 2 and controls the necessary control when polishing (dressing) the electrode tips 1a and 1b, and the dresser main body controlled by the controller 3 by the electrode tips 1a and 1b during dressing. 2 is provided with a pressurizing drive system 4 for pressurizing 2 with a predetermined pressing force.

The controller 3 receives a dress signal S1 which is a dress start command from a master sequencer 5 which is a main controller for controlling the welding robot, and outputs a motor drive signal S4 for driving the motor of the dresser main body 2. At the same time, the pressurizing drive system 4 outputs a pressurizing force level setting signal S2 for setting the pressurizing force of the dresser main body 2 by the electrode tips 1a and 1b and a pressurizing signal S3 for switching pressurizing / non-pressurizing at a predetermined timing. Control.

The pressure drive system 4 uses the air from the air source to filter 11, regulator 12, and lubricator 1.
3, the supplied air is supplied to the electropneumatic proportional valve 14 which controls the air pressure according to the control voltage (pressurization level setting signal S2) and sends it out, and the air from the electropneumatic proportional valve 14 is supplied. , Is supplied to a cylinder 16 which opens and closes the upper guns 1A and 1B via a pressurizing solenoid valve 15 which opens and closes an air supply path in response to a control signal (pressurizing signal S3).

Further, the controller 3 inputs a manual dressing permission signal from the master sequencer 5 for permitting manual dressing, a 1 to 3 channel pressure signal (selection signal) for setting welding pressure, and the like. A motor abnormality signal or the like is output to the master sequencer 5. Further, the welding pressurization signal from the welding timer 6 of the welding robot is input, interlocked with the dress pressurization signal (pressurization signal S3), and then output to the pressurization solenoid (solenoid valve) 15. When the welding pressurizing signal and the dress pressurizing signal output from the welding timer 6 are processed in the master sequencer 5 and output from the master sequencer 5 to the pressurizing solenoid 15, it is not necessary to do so. .

As shown in FIG. 2, the controller 3 includes an input interlock circuit 21 and an input interface (I / F) circuit 22 which form a start input receiving means, a malfunction prevention circuit 23, and a welding timer interlock means. Of the welding timer interlock circuit 24 and a motor rotation delay circuit 25 which is a delay unit that constitutes a drive source control unit.
And a motor switching circuit 26 which is a drive source switching means, a timing generation circuit 27 which is a timing generation means which constitutes a pressurization control means, an interface circuit 28 which is a dress pressure setting means, a chip dress pressure setting circuit 29, and a switching means. A certain pressurizing valve switching circuit 30, a welding pressurizing setting means, an interface circuit 31, a weld pressurizing setting circuit 32, and the like are provided.

The input interlock circuit 21 receives the dress signal S1 from the master sequencer 5 and the controller 3
It is for interlocking with a manual dressing signal (hereinafter also referred to as "manual dressing signal") S1 'from a manually dressing disc (which will be described later) that can be detachably connected to the Only in this state, the dressing signal S1 'by the manual dressing board is enabled and the dressing signal (hereinafter, also referred to as "automatic dressing signal") S1 from the master sequencer 5 is disabled. The input I / F circuit 22 generates and outputs the activation signal S5 from the input dress signal S1 or S1 ′.

The malfunction prevention circuit 23 includes the input I / F circuit 2
This is a circuit for inputting and outputting the start signal S5 from 2 as it is, and for preventing the start signal S5 from being output regardless of the dress signals S1 and S1 ′ when the power is turned on. The welding timer interlock circuit 24 is a circuit for interlocking the pressurizing signal with the welding timer 6.

The motor rotation delay circuit 25 delays the end side of the start signal S5 from the input I / F circuit 22, that is, from the time when the start signal S5 is input until a predetermined time elapses after it is not input. During this period, the motor drive signal S6 is output. The motor switching circuit 26 includes the dresser body 2
The motor rotation delay circuit 2 is installed in the power supply path to the motor of
While the motor drive signal S6 from 5 is being input, the power supply path to the motor of the dresser body 2 is closed and the motor drive signal S
4 (motor power supply voltage) is output to switch between driving and non-driving the motor.

The timing generation circuit 27 has a timing signal S10 (consisting of three kinds of signals S11 to S13, which will be described later) according to a predetermined pressurizing pattern based on the activation signal S5 from the input I / F circuit 22. And outputs the timing signal S10 to the chip dress pressure setting circuit 29 via the interface circuit 28, and also generates and outputs the pressurization timing signal S7 based on the timing signal and the start signal S5. Here, the "predetermined pressurization pattern" indicates the relationship between the dressing pressure and the time for applying the dressing pressure, and in the present embodiment, the pressurizing force is divided into prepressurization, main pressurization, and finishing pressure. There are 3 levels, the time to apply the pre-pressurizing force is the pre-pressurizing time, the time to apply the main pressurizing force is the main pressurizing time, and the time to apply the finishing pressurizing force is the finishing pressure time. The timing generation circuit 27 generates a timing signal for each pressurizing time.

The tip dressing pressure setting circuit 29 is responsive to the timing signal S10 from the timing generating circuit 27 which is input via the interface circuit 28.
A pressing force level setting signal S2, which is a voltage signal for setting the pressing force of the dresser main body 2 by a and 1b, is output to the electropneumatic proportional valve 14. Pressure valve switching circuit 3
0 is applied to the pressurizing solenoid valve 15 in response to the pressurizing timing signal S7 from the timing generating circuit 27.
3 is output to switch pressurization / non-pressurization of the dresser main body 2 by the electrode tips 1a and 1b.

The interface circuit 31 validates and outputs the selection signal S8 from the master sequencer 5 in response to the pressurization timing signal S7 from the timing generation circuit 27. The welding pressure setting circuit 32 is the interface circuit 31.
A pressure signal level setting signal S2 ', which is a voltage signal for setting a welding pressure at the time of welding in response to a selection signal S8 (consisting of three types of selection signals S81 to 83 as described later) input via Is output to the electropneumatic proportional valve 14.

Next, details of each unit will be described with reference to FIG. 3 and subsequent figures. Referring to FIG. 3, first, at terminals E1 and E2 of terminal T1 of controller 3, contact RY for generating automatic dress signal S1 of master sequencer 5 is generated.
1 and a manual dressing permission contact RY2 for generating the manual dressing permission signal, and the power supply voltage P from the master sequencer 5 is connected to the terminal P of the terminal T1.
(Here, 24V) is supplied. Further, a manual dressing board 7 can be detachably connected to the controller 3, and the manual dressing board 7 has a start switch 8 and a manual dressing permission state which are push button type switches for generating a manual dressing signal S1 ′. A display lamp 9 for displaying is displayed. Although a connector is provided between the manual dressing board 7 and the manual dressing board 7, the illustration is omitted in FIG.

Input interlock circuit 21 and input I /
The F circuit 22 will be described. First, the primary side of the light emitting diode LE1 of the automatic start signal generation photocoupler 35 of the input I / F circuit 22 is connected to the terminal T via the resistor R1.
1 is connected to the terminal P1 and the secondary side of the light emitting diode LE1 is connected to the terminal E1 (the automatic dress signal S1 input terminal) of the terminal T1 via the diode D1 of the input interlock circuit 21. Therefore, the photo coupler 35 for generating the automatic start signal becomes operable only when the power supply voltage P is supplied from the master sequencer 5, and the automatic dress signal S1 is validated.

The primary side of the light emitting diode LE1 is connected to the terminal E2 of the terminal T1 (manual dress permission input terminal) via the diode D2 of the input interlock circuit 21.
When the manual dressing permission contact RY2 of the master sequencer 5 is turned on, the photo coupler 35
The light emitting diode LE1 is kept off, that is, the automatic dressing signal S1 is invalidated in the manual dressing permitted state. The capacitor C1 and the resistor R2 are connected in parallel with the light emitting diode LE1 of the photocoupler 35.
Are connected.

Further, the primary side of the light emitting diode LE2 of the photo coupler 36 for generating the manual start signal of the input I / F circuit 22 is connected to the terminal P of the terminal T1 via the resistor R3, and the secondary side of the light emitting diode LE1 is connected. Side can be connected to the contact on one side of the manual start switch 8 of the manual dressing board 7, and the diode D2 of the input interlock circuit 21 can be connected.
The secondary side can be connected to the contact on one side of the manual start switch 8 of the manual dressing board 7. Therefore, the photo coupler 36 for generating the manual start signal becomes operable only when the power supply voltage P is supplied from the master sequencer 5, and the manual dress signal S1 'is validated.

A capacitor C2 is connected in parallel with the light emitting diode LE2 of the photocoupler 36, and a manual dressing permission is displayed between the secondary side of the diode D2 of the input interlock circuit 21 and the terminal P of the terminal T1. The display lamp 37 and the resistor R4 are connected in series, and the display lamp 9 of the manual dressing board 7 can be connected in parallel with the display lamp 37 and the resistor R4 via the resistor R5.

On the other hand, the internal voltage is supplied to the phototransistor PT1 on the output side of the photocoupler 35 of the input interface circuit 22 via the resistor R6, and the connection point between the phototransistor PT1 and the resistor R6 is connected via the capacitor C3. In addition to being grounded, the voltage across the capacitor C3 is output via the Schmitt trigger inverter 38, and the phototransistor PT on the output side of the photocoupler 36 is also provided.
2 is supplied with an internal voltage via a resistor R7, the connection point between the phototransistor PT2 and the resistor R7 is grounded via a capacitor C4, and the voltage across the capacitor C4 is passed via a Schmitt trigger inverter 39. It is outputting.

The output signal from the Schmitt trigger inverter 38 corresponding to the ON / OFF state of the phototransistor PT1 of the photocoupler 35 is passed through the diode D3 and the phototransistor P of the photocoupler 36.
The output signals from the Schmitt trigger inverter 39 according to the ON / OFF state of T2 are output through the diode D4, respectively, and the secondary sides of these diodes D3 and D4 are connected to combine the output signals. Diode D
The secondary side of 3, D4 is grounded via a resistor R8,
The voltage signal at the connection point between the secondary side of the diodes D3 and D4 and the resistor R8 is used as the input signal of the AND circuit 40, and this AND
The output of the circuit 40 is output as the start signal S5.

The malfunction prevention circuit 23 includes the input I / F circuit 2
2 of the AND circuit 40 includes a resistor R9, a capacitor C5, and a diode D5 for integrating the activation signal S5, and Schmitt trigger inverters 41 and 42 that output the activation signal S5 by the output of the integration circuit. The welding timer interlock circuit 24 also activates the start signal S5 from the AND circuit 40 of the input I / F circuit 22.
And a switching transistor TR1 that is controlled to be turned on / off by inputting
A relay 43 connected between R1 and the power supply, and a relay 43
Diode D6 and transistor TR connected in parallel with
1 and a resistor R11 connected in parallel.

Referring to FIG. 4, at the terminal T2 of the controller 3, a motor 44 which is a drive source of the dresser main body 2 is provided.
Is connected to the terminals T1 and O2 of the terminal T1, and a motor power source for supplying a predetermined voltage to the motor 44 is connected thereto.

The motor rotation delay circuit 25 has a start signal S5.
Dual retriggerable monostable multivibrator (hereinafter simply referred to as “monomulti”) 45 for inputting, a resistor R12 and a capacitor C6 for setting the pulse width of the monomulti 45, a start signal S5 and the monomulti And an OR circuit 46 which takes the logical sum of the Q output of 45 and outputs as a motor drive signal S6. The pulse width of the mono-multi 45 changes from a high level "H" (hereinafter simply referred to as "H") of the start signal S5 to a low level "L" (hereinafter simply referred to as "L"). The motor drive signal S6 is set to "L" after a lapse of a predetermined time, for example, 1 sec.

The motor switching circuit 26 receives the motor drive signal S6 from the motor rotation delay circuit 25 as a resistor R13.
And a switching transistor TR2 which is turned on / off via a photo triac 46, a surge absorbing element 47, a resistor R14, etc., and the output side (light receiving side) of the photo triac 46 is a motor 44 of the dresser body 2.
The input side (light emitting side) of the phototriac 46 is turned on / off by the switching transistor TR2.
By turning off, the power supply path to the motor 44 is opened and closed.

An indicator lamp 48 for indicating that the motor power is turned on is connected to the power supply path to the motor 44 of the dresser main body 2 and the external state is closed when an overcurrent flows to the motor 44. Overcurrent indicator 51 via contact 49
A series circuit of a resistor R15 and a resistor R15 is provided between the power supply and ground, and a relay 52 and a diode D are also provided via an external contact 50 which is closed when an overcurrent flows to the motor 44.
A parallel circuit of 7 is interposed between the power supply and the ground. Relay 5
The fact that the normally open contact CR2 of 2 is turned on is output to the master sequencer 5 as a motor abnormality signal.

Next, referring to FIG. 5, the timing generating circuit 27 includes a pre-pressurizing mono-multi 55, a main pressurizing mono-multi 56, and a finishing pressure mono-multi 57 which are each composed of a dual retriggerable monostable multivibrator. And a variable resistor VR1, a resistor R16, and a capacitor C7 for setting the pulse width (pre-pressurization time) of the monomulti 55, and a variable resistor VR2 for setting the pulse width (main pressurization time) of the monomulti 56. , A resistor R17, a capacitor C8, a variable resistor VR3 for setting the pulse width (finishing pressure time) of the monomulti 57, a resistor R18, a capacitor C9, and AND circuits 58, 59.

The start signal S5 is sent to the pre-press mono-multi 55.
And the signal S11 which is the inverted Q output of the pre-pressurizing monomulti 55 and the starting signal S5 are input to the AND circuit 58, and the output of the AND circuit 58 is input to the main pressurizing monomulti 5.
6, the signal S12 which is the inverted Q output of the main pressurizing monomulti 56 and the signal S11 of the prepressurizing monomulti 55.
Is input to the AND circuit 59, the output of the AND circuit 59 is input to the finishing pressure monomulti 57, and the inverted Q output of the finishing pressure monomulti 57 is used as the signal S13 to output from these monomultis 55, 56, 57. Each signal S11, S1
2, S13 is output to the interface circuit 28.

Here, the signal S11 from each monomulti 55.
Is output until the guns 1A and 1B reach the dresser body 2, and the time when the signal S12 is output from the monomulti 56 (main pressurization time) is the electrode tip 1
The time until the alloy layers at the tips of a and 1b can be reliably removed, and the time at which the signal S13 is output from the monomulti 57 (finishing pressure time) is adjusted and set to the time until the cutting burr is removed.

Further, the timing generation circuit 27 includes a resistor R19, diodes D8 and D9, inverters 61 and A.
Pressurization timing signal generation circuit 60 including ND circuit 62
have. This pressurization signal generation circuit 60 uses the power source VDD
To the inverting Q output terminal of the finishing pressure monomulti 57, and the secondary side of the diode D8 is connected to the primary side of the diodes D8 and D9 via a resistor R19.
The secondary side is the secondary side. The finishing terminal CL for clearing the mono multi 57.
Connect to R (the output side of AND circuit 59) respectively
A signal of the connection point of the primary side of the diodes D8 and D9, which constitutes the D circuit and is the output of the AND circuit, is input to the AND circuit 62 via the inverter 61, and the start signal S5 is generated.
Is used as the other input of the AND circuit 62, and the AND circuit 62
Is output as the pressurization timing signal S7.

Referring to FIG. 6, the dress-type interface circuit 28 includes a signal S11 from the pre-pressurizing mono-multi 65 of the timing generating circuit 27, the main press-up mono-multi 56.
Photocouplers 65 to 6 for respectively inputting the signal S12 from the finishing pressure monomulti 57 and the signal S13 from the finishing pressure monomulti 57.
7 and resistor R20. Chip dress pressure setting circuit 2
Reference numeral 9 denotes each photo coupler 65 of the interface circuit 28.
Resistors R21 to R23, variable resistors VR4 to VR6 connected to the output side of 67, a resistor R24, and a diode D10.
D12, and outputs a voltage signal corresponding to the resistance values of the resistors R21 to R23, the resistor R24, and the variable resistors VR4 to VR6 to the electropneumatic proportional valve 14 as a pressing force level setting signal S2.

Here, the pressing force at the time of pre-pressurization (pre-pressurizing pressure) is a low pressing force for protecting the cutting tool of the dresser body 2,
The pressing force (main pressing force) at the time of actual pressurization is the electrode tips 1a, 1b.
In addition to the high pressing force that allows cutting to reliably remove the alloy layer at the tip, the pressing force at the time of finishing pressure (finishing pressure) is the lowest enough to eliminate cutting burrs etc. (finishing pressure) Set to.

Therefore, shifting to FIG. 7, the pressurizing valve switching circuit 30 includes a switching transistor TR.
3, a photo triac 68, a surge absorbing element 69, and resistors R25 and R26. The pressurizing timing signal S7 from the timing generation circuit 27 is input to the transistor TR3 via the resistor R25 to pressurize the output end of the photo triac 68. The solenoid valve 15 is provided in a power supply path, and the transistor TR3 switches the light emitting element side to switch the pressurizing solenoid valve 15 on / off (pressurize / non-pressurize). .

Further, normally open contacts CR11 and CR12 of the relay 43 of the welding timer interlock circuit 24 (see FIG. 3) described above are interposed in the power supply path to the pressurizing solenoid valve 15. Further, the normally closed contacts CR13 and CR14 of the relay 43 are provided in the power supply path from the solenoid valve terminal of the welding timer 6 to the pressurizing solenoid valve 15, and the controller 3 is operated when the dress is permitted (when the relay 43 is activated). The power supply path to the pressure solenoid valve 15 is closed, and the welding timer 6
The power supply path from the solenoid valve terminal to the pressurizing solenoid valve 15 is shut off by an interlock.

The interface circuit 31A constitutes the interface circuit 31 of FIG. 2 together with the interface circuit 31B of FIG. 6, and the selection signal S8 from the master sequencer 5 is used.
Three photocouplers 7 for inputting S1, S82, and S83 via display devices (light emitting diodes) 71 to 73, respectively.
4 to 76, resistors R27 to 29 connected to the input side light emitting elements of these photocouplers 74 to 76, resistors R30 to R32 connected between the output side phototransistors of the photocouplers 74 to 76 and the power supply, and Capacitors C11 to C13 connected between the output side photo transistor and ground;
Pressurization timing signal S7 from the timing generation circuit 27
And OR circuits 77 to 79 that take the logical sum of the output signals of the photocouplers 74 to 76. The power supply circuit 85
An indicator lamp 86 for indicating that the control power supply is turned on is connected to the power supply path to.

Then, returning to FIG. 6, the welding interface circuit 31B is composed of three photocouplers 80 to 82 for inputting the signals S14 to S16 from the interface circuit 31A, respectively. As the light emitting element, the dress-type interface circuit 28 described above is used.
Power is supplied via. The welding pressure setting circuit 32 includes resistors R33 to R35 and variable resistors VR7 to V connected to the output sides of the photocouplers 80 to 82 of the interface circuit 31B.
R9, a resistor R36, and diodes D13 to D15, and a voltage signal corresponding to the resistance values of the resistors R33 to R35, the resistor R36, and the variable resistors VR7 to VR9 is applied to the electropneumatic proportional valve 14 as a pressure level setting signal S2 '. Output.

The controller 3 described above, as shown in FIG. 8, has variable resistors VR1, VR2, VR for setting the dressing time.
3, the variable resistors VR4 to VR6 for setting the dressing pressure, the variable resistors VR7 to VR9 for setting the welding pressure are arranged so that they can be operated externally, and a restable 87 for detachably connecting the manual dressing board 7 is provided. A dress permission display lamp 37, a motor power supply display lamp 48, a control power supply display lamp 86, and a motor abnormality display lamp 51 are also arranged. Here, regarding the variable resistors VR1 to VR9,
It is provided so that it can be operated externally while it is installed on the internal PCB board. The controller 3 may be provided with a rotary switch 88 for manually selecting the welding pressure.

Next, the operation of the chip dresser system configured as described above will be described with reference to FIGS. 9 and 10. First, referring to FIG. 3, when the dress signal generation contact RY1 of the master sequencer 5 is closed in a state where the voltage P is supplied from the master sequencer 5 to the controller 3, the manual dress permission contact RY2 is opened. If it is (manual dress prohibited state), input I / F
Since the light-emitting diode LE1 of the automatic start signal photocoupler 35 of the circuit 22 is supplied with power to emit light, the phototransistor PT1 of the photocoupler 35 is turned on, the output side of the Schmitt trigger inverter 38 becomes "H", and the diode The activation signal S5 output from the AND circuit 40 via D3 becomes "H".

Further, with the manual dressing board 7 connected, the manual dressing permission contact RY2 of the master sequencer 5 is connected.
When the start switch 8 of the manual dressing board 7 is pressed (turned on) while is closed (manual dressing permission), the photo coupler 36 for the manual start signal of the input I / F circuit 22 is pressed. Since the light emitting diode LE2 is powered and emits light, the phototransistor PT2 of the photocoupler 36
Is turned on and the Schmitt trigger inverter 39
Output side of H becomes "H", and AN is connected via diode D4.
The activation signal S5 output from the D circuit 40 becomes "H".

That is, the controller 3 can start the manual dressing by connecting the manual dressing board 7. Only when the master sequencer 5 gives the manual dressing permission, the automatic dressing signal S1 'by the starting switch 8 is provided. Can be activated and manual dressing can be started.

Here, in the state where the manual dressing permission is given, if the dress signal S1 for automatic start is output (contact RY1 is closed) due to an abnormality of the master sequencer 5 or the like, the contact RY2. Is closed, the primary side of the light emitting diode LE1 of the automatic start signal photocoupler 35 has dropped to "L".
Even if the dress signal S1 is output, the light emitting diode LE1 is not supplied with power to emit light, and therefore the phototransistor PT1 of the photocoupler 35 is not turned on.

As described above, by allowing the manual dressing board 7 to be detachably connected, various settings such as setting of dressing pressure and welding pressure, timing setting, etc. according to the welding robot can be performed at the time of system introduction. It will be possible. Then, when the manual dressing board 7 is detachably connected, only when the master sequencer 5 gives the manual dressing permission, the manual dressing signal (dressing start command) is issued.
Is enabled and the master sequencer 5 is enabled by interlocking the manual dressing permission and the automatic dressing signal.
By disabling the automatic dress control from, it is possible to avoid the conflict between the manual dress start and the automatic dress start.

Further, the automatic dressing signal from the master sequencer 5 and the manual dressing signal from the manual dressing board 7 are logically ORed by the OR circuit consisting of the two diodes D3 and D4. There is no need to increase the number of ICs, and the cost is low. Further, by supplying power from the master sequencer 5 to the automatic start photocoupler 35 and the manual start photocoupler 36 of the controller 3, it becomes possible to directly drive the controller 3 from the outside, and noise etc. It is hard to be affected by, and a controller resistant to noise can be obtained.

In this manner, the dress signal S1 from the master sequencer 5 or the dress signal S1 'from the start switch 8 of the manual dressing board 7 causes the A of the input I / F circuit 22 to be A.
When the activation signal S5 is output from the ND circuit 40, the activation signal S5 is delayed as it is until the charging voltage of the capacitor C5 of the malfunction prevention circuit 23 reaches the operating voltage of the Schmitt trigger inverters 41 and 42, and is kept as it is. It is output as a start signal S5.

At this time, since the activation signal S5 is also input from the AND circuit 40 of the input I / F circuit 22 to the welding timer interlock circuit 24, the switching transistor TR1 is turned on and the relay 43 is activated. ,
Normally open contacts CR11, CR12 of the relay 43 shown in FIG.
Is closed and the controller 3 pressurizes the solenoid valve 1
5 is closed and the normally closed contact CR13,
The CR 14 is opened, and the power supply path from the welding timer 6 to the pressurizing solenoid valve 15 is released and cut off.

On the other hand, the start signal S5 output from the input I / F circuit 22 through the malfunction prevention circuit 23 is input to the motor rotation delay circuit 25 as shown in FIG.
As shown in (a), when the activation signal S5 becomes "H", the output of the OR circuit 46 becomes "H" as shown in FIG. Of the motor drive signal S6 remains "H" while the Q output of the monomulti 45 is "H" even after the Q output of "H" and the activation signal S5 becomes "L". When the Q output of the multi 45 becomes "L", the motor drive signal S6 also becomes "L". Time Δ until the motor start signal S6 becomes “L” after the start signal S5 becomes “L”
t is set by the pulse width of the monomulti 45.

In this way, while the motor drive signal S6 from the motor rotation delay circuit 25 is "H", the phototriac 46 of the motor switching circuit 26 is in the on (closed) state, and the dresser main body 2 The power supply path to the motor 44 is closed, and the motor 44 rotates.

Since the activation signal S5 output from the input I / F circuit 22 through the malfunction prevention circuit 23 is input to the timing generation circuit 27 as shown in FIG. 5, the activation signal S5 becomes "H". Then, as shown in FIG. 9C, the pre-pressing monomulti 55 is connected to the variable resistors VR1 and R16.
Also, a signal S11 that becomes “L” for a predetermined time (pre-pressurization time t1) determined according to each value of the capacitor C7 is output. While the signal 11 is “L”, the photocoupler 65 of the interface circuit 28 shown in FIG. 6 is turned on, so that the chip dress pressure setting circuit 29 causes the resistors R21 and R2 to be turned on.
4 and a voltage signal corresponding to the resistance value determined by the variable resistance VR4 are output to the electropneumatic proportional valve 14 as a pressing force level setting signal S2, and the pressing force of the dresser body 2 by the electrode tips 1a and 1b is set to the pre-pressurizing pressure. To do.

Thereafter, the signal S of the pre-pressurizing monomulti 55 is output.
When 11 rises to "H", as shown in FIG. 9D, the variable resistor VR2 and the resistor R1 are released from the main pressurizing monomulti 66.
7 and the signal S12 which becomes "L" for a predetermined time (main pressurization time t2) determined according to the respective values of the capacitor C8. While this signal 12 is "L", the photocoupler 66 of the interface circuit 28 shown in FIG.
2, a voltage signal corresponding to the resistance value determined by R24 and the variable resistor VR5 is output to the electropneumatic proportional valve 14 as a pressing force level setting signal S2, and the pressing force of the dresser main body 2 by the electrode tips 1a and 1b is the main pressing force. Set to.

Further, the signal S of the main pressurizing mono-multi 65 is used.
When 12 rises to "H", as shown in FIG. 9 (e), the finishing pressure mono-multi 67 changes the variable resistor VR3 and the resistor R1.
8 and a signal S13 that is "L" for a predetermined time (finishing pressurization time t3) determined according to each value of the capacitor C9. While this signal 13 is "L", the photocoupler 67 of the interface circuit 28 shown in FIG.
3, R24 and variable resistor VR56 A voltage signal corresponding to the resistance value determined is output to the electropneumatic proportional valve 14 as a pressing force level setting signal S2, and the pressing force of the dresser body 2 by the electrode tips 1a and 1b is set to the finishing pressure. To do.

On the other hand, in the pressurizing timing signal generating circuit 60 of the timing generating circuit 27, the activation signal S5 is "H".
Signal S1 of the pre-loading mono-multi 55 when
1 or the output of the AND circuit 59 is "L" when the signal S12 of the mono-multi 56 for main pressurization is "L", the diode D9 becomes conductive and the inverter 61
Since the input side of is at "L", its output becomes "H", the output of the AND circuit 62 becomes "H", and when the signal S13 of the finishing pressure monomulti 57 is "L", the diode D8 is Since the state becomes conductive and the input side of the inverter 61 becomes "L", its output becomes "H",
The output of the AND circuit 62 becomes "H".

As a result, the pressurizing timing generation circuit 6
From 0, the start signal S5 is "H" as shown in FIG. 9 (f).
It becomes "H" from when it becomes, and the start signal S5 is "L".
Signal or the signal S13 of the finishing pressure monomulti 57
When the voltage changes from "L" to "H", the pressurizing timing signal S7 which changes to "L" is output. This pressurization timing signal S
While 7 is "H", power is supplied to the pressurizing solenoid valve 15 of FIG. 7 as described above, and the upper gun 1A and the lower gun 1B are connected.
The blade of the dresser body 2 is pressed by the electrode tips 1a and 1b.

In this case, when the switching control of the pressurizing solenoid valve 15 is performed only by the start signal S5, the output time of the start signal S5 (time to set to "H") is determined by the setting of the master sequencer 5, so that prepressurization is performed. Regardless of the setting of the finish pressure time when the time and / or the main pressurization time is adjusted, the pressurizing solenoid valve 15 is closed and the gun is released, so that the finish pressure time can be secured. There is a fear of not.

Therefore, as in this controller 3, the logical product of the starting signal S5 and the timing signal S13 for finishing pressure is calculated, and when either of them is completed, the pressurizing solenoid valve 5 is closed to release the gun. By setting the output time of the start signal S5 (the output time of the dress signal S1 of the master sequencer 5) slightly longer, the adjustment range of the pre-pressurization time, the main pressurization time, and the finishing pressure time can be adjusted. A margin can be provided, a required finishing pressure time can be secured, and dress quality is improved.

It should be noted that the start signal S5 or the signal S11 of the pre-pressurizing mono-multi 55 is applied to the AND circuit 5 at the clear terminals CLR of the main-pressing mono-multi 56 and the finishing press mono-multi 57.
What is input via 8, 59 is that the inversion Q output of the pre-pressurizing mono-multi 55 (signal S11) directly activates the main-pressing mono-multi 56, and the inversion Q of the main-pressurizing mono-multi 56 is input.
When the finishing pressure monomulti 57 is directly activated by the output (signal S12), that is, when three monomultis serving as timers are simply combined to generate a timing corresponding to a predetermined pattern, the monomulti 57 is activated by the transient characteristics of the monomulti. A delay time occurs between when the signal S5 is input and when the inverted Q output of the pre-pressurizing mono-multi 55 becomes "L", and when the start signal S5 is input, the main pressurizing mono-multi 56. This is for avoiding the inconvenience that it also operates.

Further, the interface circuit 28 of the present embodiment.
Also, by generating one output signal using a photocoupler and a diode array like the chip dress pressure setting circuit 29, the space occupied on the substrate is smaller than when a switching relay is used, and resistance and variable A wide adjustment range can be obtained by combining the resistors.

Next, since the pressurizing timing signal S7 output from the timing generating circuit 27 is input to the interface circuit 31A, the OR circuits 77 to 79 of the interface circuit 31A are operated by the pressurizing timing signal S7.
While 7 is "H", its output is "H" regardless of the other input.
Therefore, the photocouplers 80 to 82 of the interface circuit 31B of FIG. 6 are held in the off state. That is, when the dress is started, the welding pressure setting circuit 32 does not function regardless of the selection signals S81 to 83 from the master sequencer 5.

On the other hand, when the pressurizing timing signal S7 is "L", the interface circuit 31
The outputs of the OR circuits 77 to 79 of A depend on the other input. That is, when the selection signal S81 from the master sequencer 5 becomes "L", the photocoupler 74 is turned on and the output of the OR circuit 77 becomes "L", so the photocoupler 80 of the interface circuit 31B is turned on. The welding pressurization setting circuit 32 receives the resistance R3.
A voltage signal corresponding to the resistance values of Nos. 3 and 36 and the variable resistor VR7 is output to the electropneumatic proportional valve 14 as a pressing force level setting signal S2 ', and the welding pressing force is set to the welding pressure 1 (channel CH1).
Set to.

Similarly, when the selection signal S82 from the master sequencer 5 becomes "L", the photocoupler 75
Is turned on and the output of the OR circuit 78 becomes "L", the photocoupler 81 of the interface circuit 31B is turned on, and the resistance R3 from the welding pressure setting circuit 32 is turned on.
A voltage signal corresponding to the resistance values of Nos. 4 and 36 and the variable resistance VR8 is output to the electropneumatic proportional valve 14 as a pressurizing force level setting signal S2 ', and the welding pressurizing force is set to the welding pressure 2 (channel CH2).
Set to. Further, when the selection signal S83 from the master sequencer 5 becomes "L", the photocoupler 76 is turned on and the output of the OR circuit 79 becomes "L". Therefore, the photocoupler 82 of the interface circuit 31B is turned on. The welding pressurization setting circuit 32 receives the resistance R3.
5, 36 and the voltage signal corresponding to the resistance value of the variable resistor VR9 is output to the electropneumatic proportional valve 14 as the pressure level setting signal S2 ', and the welding pressure is the welding pressure 3 (channel CH3).
Set to

By making it possible to selectively set the welding pressurizing force at the time of welding by the selection signals S81 to 83 from the master sequencer 5 as described above, the welding pressurizing force corresponding to each welding portion of one workpiece can be obtained. Can be set,
As a result, the welding conditions can be made uniform and the welding quality is improved.

Next, the overall flow of the chip dressing using the controller 3 will be briefly described with reference to FIG. 10. In the automatic dressing (automatic operation), the master sequencer 5 causes the welding robot to dress the main body 2 of the dressing robot. Move it to a position where it is possible, and place it on the cutting tool of the dresser body 2 with the electrode tips 1a, 1b of the upper and lower guns 1A, 1B.
Are aligned and set, and then the master sequencer 5 supplies a dress signal S1 to the controller 3 as shown in FIG.
Is output and the motor drive signal S6 is output, the motor 4 of the dresser main body 2 is output as shown in FIG.
4 is rotationally driven, and the pressurizing timing signal S7 is output to operate the pressurizing solenoid valve 15 as shown in FIG. 7C, and the prepressurizing pressurizing level setting signal S2 is output. As a result, the electropneumatic proportional valve 14 controls the air pressure to pre-pressurize as shown in FIG. 7D, and the electrode tip 1a of the upper gun 1A and the electrode of the lower gun 1B are pressed by the pre-pressurizing force. Dresser body 2 by tip 1b
Apply pressure by sandwiching the blade.

Thereafter, the electropneumatic proportional valve 14 is responsive to the timing signal from the timing generation circuit 27 of the controller 3.
The pressurization level setting signal S2 for is switched to the main pressurization and finishing pressure voltage signals in sequence, and the pressurizing force to the dresser body 2 is switched to the main pressurizing force and the finishing pressure at a predetermined timing, and after the dressing, When the dress signal S1 from the master sequencer 5 is no longer output or when a predetermined finishing pressure time has elapsed, the pressurizing solenoid valve 15
Stops operating and the upper gun 1A and the lower gun 1B are released.

In this case, since the motor drive signal S6 is output to the motor 44 of the dresser main body 2 for a predetermined time set after completion of the dressing, the motor 44 is driven as shown in FIG. The operation is stopped after a lapse of a predetermined time, for example, 1 second. By delaying the stop of the motor 44 in this way, since the guns 1A and 1B are opened and closed by the air, if the piping of the air supply path becomes long, a response delay occurs from the stop of the air supply to the release of the gun. When the motor 44 stops within the delay time, the motor 44 stops with the electrode tips 1a and 1b sandwiching the cutting tool of the dresser main body 2, causing scoring and the like, and the dress quality cannot be ensured. Can be prevented.

Next, when performing the manual dressing operation, with the manual dressing board 7 connected to the controller 3, the master sequencer 5 closes the manual dressing permission contact RY2 to permit the manual dressing. In this case (the manual dressing permission display lamp 9 is lit), the activation signal S5 is output while the activation switch 8 is being pressed, so that the dressing work can be performed during this period.

When this manual dressing is performed, it is light at the time of pre-pressurization, heavy at the time of main pressurization, and becomes light again at the time of finishing pressure. Therefore, the completion of the dressing is confirmed by sound or pressure gauge pressure, and the start switch 8 after the dressing is completed. Turning off causes the gun to release and the motor 44 to stop.

[0089]

As described above, according to the tip dresser of the first aspect, the dresser body having the drive source for driving the cutting tool for polishing the electrode tip of the welding machine and the dresser body by the electrode tip of the welding machine are provided. In addition to controlling pressure / non-pressurization and pressure, a controller for driving and controlling the drive source of the dresser body is provided separately, and a dress start command is given to this controller from the main control device that controls the welding machine. By doing so, the tip dresser itself can be downsized and can be incorporated as part of a welding line, and a tip dresser that can be applied to welding equipment such as various welding robots can be obtained.

According to the chip dresser of claim 2, in the chip dresser of claim 1, means for validating the dress start command only when the controller is supplied with power from the main controller is provided. It is possible to obtain a chip dresser that can drive the controller directly from the device and is not easily affected by noise or the like. .

According to the tip dresser controller of the third aspect, a main controller for controlling the welding machine is provided separately from the dresser body having the drive source for driving the cutting tool for polishing the electrode tip of the welding machine. A start input receiving means for receiving a dress start command and outputting a start signal, and controlling pressurization / non-pressurization and pressurization of the dresser main body by the electrode tip of the welding machine according to the start signal from the start input receiving means. Since the pressurizing control means and the drive source control means for controlling the drive source of the dresser body according to the start signal from the start input accepting means are provided, the tip dresser can be incorporated as a part of the welding line. A tip dresser that can be applied to welding equipment such as various welding robots is obtained.

According to the controller of the chip dresser of claim 4, in the controller of claim 3, the pressurizing control means is a timing signal according to a predetermined pressurizing pattern based on the activation signal from the activation input receiving means. From the timing generation means for generating and outputting, the dressing pressure setting means for setting the pressing force of the dresser body by the electrode tip according to the timing signal from this timing generation means, the activation signal from the activation input acceptance means and the timing generation means. Since it is equipped with a switching means for switching between pressurizing and non-pressurizing the dresser body by the electrode tip in accordance with the timing signal of, the automatic start of the dressing is performed by outputting a start signal. The controller that can do is obtained.

According to the chip dresser controller of the fifth aspect, in the controller of the third or fourth aspect, the drive source control means preliminarily sets the end point of the activation signal based on the activation signal from the activation input acceptance means. A delay means for outputting a motor drive signal delayed by a predetermined time, and a drive source switching means for switching between drive / non-drive of the drive source of the dresser body according to the motor drive signal from the delay means are provided. Therefore, even if there is a response delay of the air that operates the electrode tip, this can be compensated for,
Welding quality can be secured.

According to the controller of the chip dresser of claim 6, in the controller according to any one of claims 3 to 5, the activation input accepting means also includes means for accepting a dress activation command by a manual operation and outputting a activation signal. With it, you can choose automatic dress and manual dress,
Initial settings such as pressure when installing the controller can be easily performed.

According to the chip dresser controller of claim 7, in the controller according to any one of claims 3 to 6, the dress start command is made effective only when the start input accepting means is powered from the main controller. Since the means for controlling is provided, it is possible to obtain the controller which can control the controller from the main control device and is not easily affected by noise or the like.

According to the controller of the eighth aspect, in the controller of the sixth aspect, the dress start command by the manual operation is valid only when the start input accepting means is given the manual dress permission from the main control device. Since the means for doing so is provided, it is possible to avoid the conflict between the automatic dress and the manual dress.

According to the controller of claim 9, the controller according to any one of claims 3 to 8 is provided with the welding timer interlock means for interlocking with the welding timer of the welding machine. You can take an interlock with the welding timer at.

According to the controller of the tenth aspect, in the controller according to any one of the third to ninth aspects, the welding pressure setting means for setting the welding pressure according to the selection signal from the main controller is provided. Therefore, the welding pressure of the welding machine can be selected, and the welding quality can be improved.

[Brief description of the drawings]

FIG. 1 is an overall system configuration diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram of a controller

3 is a circuit diagram showing details of a part of an input interlock circuit, a part of an input interface circuit, a malfunction prevention circuit, and a welding timer interlock circuit of FIG. 2;

FIG. 4 is a circuit diagram showing details of a motor rotation delay circuit, a motor switching circuit, and the like in FIG.

5 is a circuit diagram showing details of the timing generation circuit etc. of FIG. 2;

6 is a circuit diagram showing details of an interface circuit, a tip dress pressure setting circuit, and a welding pressure setting circuit of FIG.

FIG. 7 is a circuit diagram showing details of the rest of the welding timer interlock circuit, the interface circuit, and the like.

[Figure 8] External view of the controller

FIG. 9 is a timing diagram used to explain the operation of the controller.

FIG. 10 is an explanatory diagram illustrating the flow of the entire chip dress.

[Explanation of symbols]

1A ... upper gun, 1B ... lower gun, 1a, 1b ... electrode tip, 2 ... dresser body, 3 ... controller, 4 ... pressurizing drive system, 5 ... master sequencer, 6 ... welding timer, 7 ...
Manual dressing board, 14 ... Static proportional valve, 15 ... Pressurizing solenoid valve, 21 ... Input interlock circuit, 22 ... Input interface circuit, 23 ... Malfunction prevention circuit, 24 ... Welding timer interlock circuit, 25 ... Motor rotation delay Circuits, 26 ... Motor switching circuits, 27 ... Timing generation circuits, 28 ... Interface circuits, 29 ... Chip dress pressure setting circuits, 30 ... Interface circuits, 32 ... Welding pressure setting circuits.

Claims (10)

[Claims] 1. In a tip dresser for polishing an electrode tip of a welding machine, a dresser body having a drive source for driving a cutting tool for polishing the electrode tip, and the dresser body are separate bodies to control the welding machine. In response to a dress start command from the main control device, the controller controls the pressurization / non-pressurization and the pressing force of the dresser body by the electrode tip of the welding machine, and the controller that drives and controls the drive source of the dresser body. Tip dresser characterized by becoming. 2. The chip dresser according to claim 1, wherein the controller is provided with means for validating the dress start command only when power is supplied from the main control device. Dresser. 3. An electrode by using a dresser body having a drive source for driving a blade tool for polishing an electrode tip of a welding machine, and driving the blade tool while the blade tool of the dresser body is pressed by the electrode tip. In a controller of a chip dresser for polishing chips, the controller is a separate body from the dresser body, and a start input receiving means that receives a dress start command from a main control device that controls the welding machine and outputs a start signal. , A pressurization control means for controlling pressurization / non-pressurization and pressurization force of the dresser main body by the electrode tip of the welding machine according to a start signal from the start input reception means, and start from the start input reception means And a drive source control means for driving and controlling the drive source of the dresser main body in response to a signal. La. 4. The tip dresser controller according to claim 3, wherein the pressurization control means generates and outputs a timing signal according to a predetermined pressurization pattern based on the activation signal from the activation input acceptance means. Timing generating means, dressing pressure setting means for setting the pressing force of the dresser body by the electrode tip according to the timing signal from the timing generating means, starting signal from the starting input receiving means and timing generating means from the starting input receiving means. A controller for a chip dresser, comprising: switching means for switching and controlling pressurization / non-pressurization of the dresser main body by the electrode tip according to a timing signal. 5. The chip dresser controller according to claim 3 or 4, wherein the drive source control means determines a termination time of the activation signal based on an activation signal from the activation input acceptance means for a predetermined time. And a drive source switching unit for switching between driving and non-driving of the drive source of the dresser body according to the motor drive signal from the delay unit. And the controller of the chip dresser. 6. The chip dresser controller according to any one of claims 3 to 5, wherein the activation input acceptance means also includes means for accepting a dress activation command by a manual operation and outputting the activation signal. A chip dresser controller. 7. The controller of the chip dresser according to claim 3, wherein the activation input accepting means validates the dress activation command only when power is supplied from the main control device. A chip dresser controller characterized by being provided. 8. The tip dresser controller according to claim 6, wherein the activation input acceptance means validates the dress activation command by the manual operation only when the manual dressing permission is given from the main control device. A chip dresser controller, characterized in that it is provided with means for performing. 9. The tip dresser controller according to claim 3, further comprising welding timer interlock means for interlocking with a welding timer of the welding machine. Chip dresser controller. 10. The tip dresser controller according to claim 3, further comprising welding pressure setting means for setting a welding pressure according to a selection signal from the main control device. A characteristic chip dresser controller.