JP2023076112A - Joint device - Google Patents

Abstract

To provide a joint device including an input system which enables complicated setting to be easily made.SOLUTION: A joint device includes: a body 21 which joins joined objects; a display 16 with a touch panel function which displays information and receives a user's operation at the same time; an operation input part 140 which receives a setting operation conducted by a user to the display 16 with the touch panel function; a display control unit 142 which causes the display 16 with the touch panel function to display a setting screen of joint of the joined objects and renews the setting screen in response to the setting operation conducted by the user; and a joint control unit 141 which controls the body 21 to join the joined objects based on contents set on the setting screen by the user.SELECTED DRAWING: Figure 1

Description

The present invention relates to a joining device such as a resistance welding device.

2. Description of the Related Art Conventionally, a resistance welding apparatus has been widely used in which an electric current is passed between electrodes to raise the temperature of objects to be welded by the generated Joule heat. Pressure, current, and time are factors that affect the strength and stability of resistance welding. In general resistance welding, which melts the joint interface, the joint is completed in a short time (5 to 100 mS). Various controls have been proposed for current and time, which can be variably controlled in a short period of time and have a large effect on the melting of the interface. The above-described resistance welding method is also used in fusing welding for thermally crimping a coated wire with a terminal (see Patent Document 1).

However, since the important factors in fusing welding are temperature (heat) and terminal deformation (force, displacement), the existing welding pressurization method that maintains a constant pressurization is not optimal. Therefore, in the technique disclosed in Patent Document 1, when one of the electrodes reaches the preset model thickness dimension of the electrothermal caulking joint, or reaches a position slightly before the model thickness dimension, , the current between the electrodes is stopped, and the control of the pressure applied to the electrodes is switched to the position control of the electrodes. According to the technique disclosed in Patent Document 1, it is possible to improve the component dimensional accuracy of the object to be welded by switching to electrode position control during welding.

In addition to joining as disclosed in Patent Document 1, settings are further complicated in order to optimally control the applied pressure, electrode position, and welding current based on time, pressure sensor, and displacement sensor inputs. However, conventional bonding apparatuses do not have such a complex control function, and there is a problem that an input system that is easy for users to understand and can be easily set has not been put into practical use.

JP 2006-7294 A

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems and to provide a joining apparatus equipped with an input system that enables complicated settings to be easily performed.

The bonding apparatus of the present invention includes a main body for bonding objects to be bonded, a display with a touch panel function that displays information and accepts a user's operation at the same time, and an operation input that receives a user's setting operation on the display with a touch panel function. a display control unit for displaying a setting screen for welding of the object to be welded on the display device with a touch panel function, and updating the setting screen according to the user's setting operation; and a bonding control unit that controls the main body to perform bonding of the objects to be bonded based on the set content.

Further, in one configuration example of the welding apparatus of the present invention, the items set on the setting screen include items for designating the type of control in which the physical quantity detected during welding is used as the controlled variable.
Further, in one configuration example of the welding apparatus of the present invention, the items set on the setting screen include a control target value whose control amount is a physical quantity detected during welding, and a time to reach the target value. , and the holding time of the target value.
In one configuration example of the bonding apparatus of the present invention, the items to be set on the setting screen can be set for each phase into which the process of bonding the objects to be bonded is divided.
In one configuration example of the joining apparatus of the present invention, the items set on the setting screen include items for designating control switching conditions for shifting to the next phase.
In one configuration example of the joining apparatus of the present invention, the items set on the setting screen include items for designating signal output to the main body.
Further, one configuration example of the welding apparatus of the present invention further includes a graph generation unit that generates a graph representing a transition of physical quantities relating to the object to be welded being welded based on the contents set on the setting screen by the user. The display control unit displays the graph generated by the graph generation unit on the screen of the display device with a touch panel function.

According to the present invention, by providing a display device with a touch panel function, an operation input section, and a display control section, it is possible to realize a bonding apparatus equipped with an input system capable of easily performing complicated settings for bonding. can.

FIG. 1 is a block diagram showing the configuration of a joining apparatus according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of a bonding head according to an embodiment of the invention. FIG. 3 is a diagram showing an example of a setting screen displayed on the display with touch panel function according to the embodiment of the present invention. FIG. 4 is a diagram showing an example of a graph according to an embodiment of the present invention; FIG. 5 is a flow chart for explaining the operation of the joining device during fusing welding according to the embodiment of the present invention. FIG. 6 is a block diagram showing a configuration example of a computer that implements the joining apparatus according to the embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a joining device (resistance welding device) according to an embodiment of the present invention. The welding apparatus of this embodiment includes a start switch 2, a rectifier circuit 3, a capacitor 4, an inverter 5, a welding transformer 6, a diode 7, a welding head 8, a hall element 9, and a current detector 10. , a voltage detection unit 11, a pressure detection unit 12, a displacement detection unit 13, a control unit 14, a storage unit 15, and a touch panel function that is a display unit that displays information and an input unit that accepts user operations. It has a display 16 with.

The start switch 2 , the rectifier circuit 3 , the capacitor 4 , the inverter 5 , the welding transformer 6 and the diode 7 constitute a power supply 20 that supplies current to the bonding head 8 . The welding head 8 and the power supply 20 constitute a main body 21 of the welding apparatus.

The control unit 14 includes an operation input unit 140 that receives a user's setting operation on the display unit 16 with a touch panel function, and a bonding control unit that performs control based on the contents set on the setting screen by the user to bond the object to be bonded. 141, a display control unit 142 that displays a setting screen on the display unit 16 with a touch panel function and updates the setting screen according to the user's setting operation; and a graph generation unit 143 that generates a graph representing the transition of physical quantities related to the bonded material.

FIG. 2 is an enlarged sectional view of the bonding head 8. FIG. The bonding head 8 includes electrodes 80a and 80b made of, for example, a copper (Cu) alloy, molybdenum (Mo), tungsten (W), or the like. The article 83 to be joined includes, for example, a covered wire 84 and a U-shaped terminal 85 arranged so as to wrap the covered wire 84 . In this joining (fusing) of the object 83 to be joined, the insulating coating 86 of the covered wire 84 is peeled off by heat, and the core wire 87 and the U-shaped terminal 85 are welded.

In addition, the welding head 8 includes pressure mechanisms 82a and 82b that move the electrodes 80a and 80b up and down to pinch and press the object 83 to be welded. The pressure mechanisms 82a and 82b are provided with load cells (not shown) so that the magnitude of the load applied to the article 83 to be welded can be converted into an electrical signal. Further, the pressure mechanisms 82a and 82b are provided with displacement sensors (not shown) so that the amount of displacement of the object 83 in the height direction can be converted into an electric signal.

The operation of the bonding apparatus of this embodiment will be described below. First, the user makes settings for welding the article 83 to be welded. FIG. 3 is a diagram showing an example of a setting screen displayed on the display with touch panel function 16. As shown in FIG.

In this embodiment, the fusing process is divided into a plurality of phases 0, 1, 2, 3, 4, . On the setting screen shown in FIG. 3, one row of Table 30 corresponds to one phase. Items that can be set on the setting screen include a control method in each phase (an item that specifies the type of control in which the physical quantity detected during welding is used as the control quantity).

Still other items include a target value (SPEED) for the movement speed of the electrodes 80a and 80b, a target value (FORCE) for the pressure applied to the object 83 to be bonded, a target value (HEIGHT) for the height of the object 83 to be bonded, a target It is possible to set the time to reach the value, the holding time of the target value (maximum value), the control switching condition (TRIGGER) for interrupting the phase and shifting to the next phase, the signal output (OUTPUT) to the main unit 21, etc. It's becoming

First, the user touches the control cell for Phase 0 in Table 30 on the setting screen and inputs "SPEED (μm/msec)", touches the SPEED cell and inputs -10 (μm/msec), Touch the arrival time cell and enter 0 (msec), touch the hold time cell and enter 200 (msec), touch the TRIGGER cell and enter "FORCE1 500". This setting controls the speed of the electrodes 80a and 80b, moves the electrodes 80a and 80b at −10 (μm/msec), and maintains that the object 83 is sandwiched between the electrodes 80a and 80b for a maximum of 200 (msec). Then, when the pressure to the object 83 to be welded reaches 500 (N), it means to shift to the next phase 1. It should be noted that the negative sign of the velocity indicates movement in the direction in which the distance between the electrodes 80a and 80b narrows.

The input method for the table 30 is a list box format or a combo box format. When the user touches a desired cell in the table 30, a list of options (for example, FORCE1, HEIGHT1, ACT IN, etc.) is displayed. selects one of the options, the list closes and the selected item is displayed in the original one-line area. Also, for inputting the numerical values in Table 30, a combo box format is adopted so that the user can freely input numerical values by touching keyboard keys (not shown) on the screen.
For the TRIGGER and OUTPUT items, a delay time may be set. Also, for the TRIGGER item, it may be possible to set an upper and lower limit range.

Input of setting items and updating of display are performed by the operation input unit 140 and the display control unit 142 of the control unit 14 . The operation input unit 140 receives a user's operation on the display device 16 with a touch panel function, and the display control unit 142 updates the setting screen according to the user's operation. Options that can be displayed in the list box are set in advance in the storage unit 15 for each column of the table 30 .

Next, the user touches the control cell in Phase 1 of Table 30 and enters "FORCE(N)", touches the FORCE cell and enters 4000(N), touches the arrival time cell and enters 100 (msec), touch the holding time cell and enter 100 (msec), touch the TRIGGER cell and enter "HEIGHT1 6000", touch the OUTPUT cell and enter "ACT IN". This setting outputs a signal "ACT IN" to the power supply 20 (bonding control unit 141) at the same time as performing pressure control to the object 83 to apply pressure to the object 83 for 100 (msec). It means that the pressure reaches 4000 (N), the pressure is maintained at 4000 (N) for a maximum of 100 (msec), and when the height of the workpiece 83 reaches 6000, the next phase 2 is performed. ing. "ACT IN" means the start of energization.

The user then touches the control cell in Phase 2 of Table 30 and enters "FORCE(N)", touches the FORCE cell and enters 2000(N), touches the time of arrival cell and enters 100 (msec), touch the holding time cell and enter 100 (msec), touch the TRIGGER cell and enter "HEIGHT2 5000", touch the OUTPUT cell and enter "ACT STOP1". This setting outputs a signal "ACT STOP1" to the power source 20 (bonding control unit 141) at the same time as performing pressure control to the object 83 to be welded, and applies pressure to the object 83 for 100 (msec). 2000 (N), maintain the state of 2000 (N) for a maximum of 100 (msec), and move to the next phase 3 when the height of the object 83 reaches 5000. ing. "ACT STOP1" means switching from the current target value of phase 1 to the current target value of phase 2.

Next, the user touches the control cell in phase 3 of Table 30 and enters "HEIGHT (μm)", touches the HEIGHT cell and enters 4000 (μm), touches the arrival time cell and enters 100 (msec), touch the holding time cell and enter 0 (msec), touch the OUTPUT cell and enter "ACT STOP2". This setting outputs a signal "ACT STOP2" to the power supply 20 (welding control unit 141) at the same time as performing height control of the object 83 to be welded, and controls the height of the object 83 to 4000 in 100 (msec). (μm), and transition to the next phase 4 at a holding time of 0 (msec). "ACT STOP2" means switching from the current target value of phase 2 to the current target values of phases 3 and 4.

Next, the user touches the control cell in Phase 4 of Table 30 and enters "HEIGHT (μm)", touches the HEIGHT cell and enters 3500 (μm), touches the arrival time cell and enters 100 (msec), touch the holding time cell and enter 100 (msec). This setting controls the height of the object 83 to be welded so that the height of the object 83 reaches 3500 (μm) in 100 (msec). msec).

The contents set by the user by operating the display device 16 with a touch panel function are stored in the storage unit 15 .
After the user's input is completed, the graph generation unit 143 of the control unit 14 generates a graph representing phase transitions of fusing welding based on the contents set by the user. FIG. 4 is a diagram showing an example of a graph created by the graph generator 143 based on the setting contents shown in FIG. In FIG. 4, P indicates the pressure applied to the object 83 to be welded, h the height of the object 83 to be welded, and I the welding current flowing through the electrodes 80a and 80b. In this way, the graph displays the transition of the physical quantity relating to the object 83 to be welded during welding.

The display control unit 142 of the control unit 14 displays the graph generated by the graph generation unit 143 on the screen of the display device 16 with touch panel function.
The user can confirm the fusing phase transition by looking at the graph displayed on the screen. When the setting is completed, it becomes possible to actually weld the object 83 to be welded.

FIG. 5 is a flow chart for explaining the operation of the joining device during fusing welding. For example, when the user operates the display device 16 with a touch panel function to instruct welding start, a start signal is output from the control unit 14 and the start switch 2 is turned on. When the start switch 2 is turned on, the rectifier circuit 3 full-wave rectifies the AC output of the 200 V AC commercial three-phase AC power supply 1 and charges the capacitor 4 connected in parallel between the output terminals of the rectifier circuit 3 . This rectifier circuit 3 is composed of a three-phase full-wave mixing bridge using six diodes 30 .

The inverter 5 converts the charging voltage of the capacitor 4 into an AC voltage and supplies it to the primary side of the welding transformer 6 . The inverter 5 is composed of a bridge consisting of four NPN transistors 50 . A secondary side output of the welding transformer 6 is full-wave rectified by a rectifier (diode) 7 and guided to electrodes 80a and 80b. As a result, a large current flows between the electrodes 80a and 80b, and the Joule heat generated raises the temperature of the object 83 to be bonded.

Current detector 10 detects current I flowing through the secondary side of welding transformer 6 (welding current flowing through electrodes 80 a and 80 b ) from the output of Hall element 9 provided on the secondary side of welding transformer 6 . Voltage detector 11 detects welding voltage V applied between electrodes 80a and 80b. The displacement detection unit 13 detects the amount of displacement D of the workpiece 83 in the height direction based on the outputs of the displacement sensors provided in the pressure mechanisms 82a and 82b.

The welding control unit 141 of the control unit 14 controls the pressure mechanisms 82a and 82b of the welding head 8 in a state in which the workpiece 83 is arranged between the electrodes 80a and 80b as shown in FIG. , 80b from the starting position at a speed of −10 (μm/msec), and the electrodes 80a and 80b sandwich and press the object 83 from above and below (step S1 in FIG. 5).

The pressure detection unit 12 detects the pressure applied to the article 83 to be bonded based on the output of the load cells provided in the pressure mechanisms 82a and 82b.
When the pressure applied to the object to be welded 83 reaches 500 (N) (YES in step S2 in FIG. 5), the welding control unit 141 shifts from phase 0 to phase 1 and performs pressure control ( 5 step S3).

In phase 1, the welding control unit 141 causes the pressure applied to the object 83 to reach 4000 (N) in 100 (msec), and maintains the pressure of 4000 (N) for up to 100 (msec). do.

At the same time, in Phase 1, the joining control section 141 starts energizing the electrodes 80a and 80b in response to the output of the signal "ACT IN". Specifically, the junction control unit 141 applies a current to the electrodes 80a and 80b by operating the inverter 5 to generate an AC voltage as described above. The welding control unit 141 monitors the welding current I detected by the current detection unit 10 in real time, and turns on/off the transistor 50 of the inverter 5 so that the waveform of the welding current I matches the target waveform. control to control the amount of energization to the electrodes 80a and 80b. A target waveform of the welding current I for each phase is preset in the storage unit 15 as a desirable welding condition.

Assuming that the position where the electrodes 80a and 80b are separated by a known predetermined distance is the origin position, the output of the displacement sensor at this origin position and the displacement when the workpiece 83 is sandwiched from above and below by the electrodes 80a and 80b are From the output of the sensor, it is possible to obtain the distance between the electrodes 80a and 80b (the height of the object 83 to be welded, h in FIG. 2) when the object 83 to be welded is sandwiched from above and below. When the height h of the object 83 to be welded reaches 6000 (μm) (YES in step S4 in FIG. 5), the welding control unit 141 shifts from phase 1 to phase 2 and performs pressure control again ( FIG. 5 step S5).

In phase 2, the welding control unit 141 causes the pressure applied to the object 83 to reach 2000 (N) in 100 (msec) and maintains the pressure at 2000 (N) for up to 100 (msec). do.

At the same time, in Phase 2, the joining control section 141 controls the amount of energization to the electrodes 80a and 80b according to the output of the signal "ACT STOP1". Specifically, the junction control unit 141 turns on/off the transistor 50 of the inverter 5 so that the waveform of the welding current I detected by the current detection unit 10 matches the target waveform of the welding current I in phase 2. control to control the amount of energization to the electrodes 80a and 80b.

When the height h of the object 83 to be welded reaches 5000 (μm) (YES in step S6 in FIG. 5), the welding control unit 141 shifts from phase 2 to phase 3 and performs height control (see FIG. 5). step S7).

In phase 3, the welding control unit 141 controls the pressure mechanisms 82a and 82b to make the height h of the object 83 to reach 4000 (μm) in 100 (msec), and immediately starts the next phase 4. to control the height again (step S8 in FIG. 5).

At the same time, in Phase 3, the joining control section 141 controls the amount of energization to the electrodes 80a and 80b according to the output of the signal "ACT STOP2". Specifically, the welding control unit 141 turns on/off the transistor 50 of the inverter 5 so that the waveform of the welding current I detected by the current detection unit 10 matches the target waveform of the welding current I in phases 3 and 4. By controlling the OFF state, the amount of energization to the electrodes 80a and 80b is controlled.

In phase 4, the welding control unit 141 controls the pressure mechanisms 82a and 82b to reach the height h of the object 83 to 3500 (μm) in 100 (msec). (μm) is maintained for 100 (msec).

This completes the fusing process. Actually, although not described in the setting of FIG. 82b is controlled to return the electrodes 80a and 80b to the starting position and separate the electrodes 80a and 80b from the object 83 to be bonded.

The fusing process described above is an example, but when the electrodes 80a and 80b are brought into contact with the article 83 to be welded, the moving speed of the electrodes 80a and 80b is important so as not to crush the article 83 too much. Also, when current is passed through the electrodes 80a and 80b, the pressure is important for stabilizing electrical resistance and heat generation. When deforming the object 83 to be welded, the amount of deformation per time is important for obtaining welding strength. In order to achieve both the strength of the object 83 to be welded and the welding strength, the height of the object 83 to be welded when the temperature is lowered after the energization is stopped is important. Also, it is important to manage phase switching to an appropriate set value.

In this embodiment, for each phase, the user can understand the control method, target value of control, time to reach the target value, retention time of the target value, control switching conditions for shifting to the next phase, signal output to the power supply, etc. can be easily set in an easy-to-use manner, and the welding device can be made to perform an ideal welding operation desired by the user. Further, in this embodiment, by changing the setting of the storage unit 15, it is possible to easily cope with a change in the hardware of the bonding apparatus, for example, an addition of a temperature sensor.

Although fusing is described as an example of resistance welding in this embodiment, the present invention can also be applied to resistance welding other than fusing. The present invention can also be applied to joining devices other than resistance welding, such as ultrasonic welding devices. As a control method in the case of an ultrasonic welding apparatus, there is, for example, temperature control of the object to be welded, and the target value of the control is the temperature target value of the object to be welded.

The functions of the control unit 14 and the storage unit 15 of this embodiment can be realized by a computer having a CPU (Central Processing Unit), a storage device, and an interface with the outside, and a program that controls these hardware resources. . A configuration example of this computer is shown in FIG.

The computer includes a CPU 200 , a storage device 201 and an interface device (hereinafter abbreviated as I/F) 202 . The I/F 202 is connected with the welding power source, the current detection unit 10, the voltage detection unit 11, the pressure detection unit 12, the displacement detection unit 13, and the like. In such a computer, a program for implementing the method of the present invention is stored in storage device 201 . The CPU 200 executes the processing described in this embodiment according to the programs stored in the storage device 201 .

The present invention can be applied to joining techniques such as resistance welding.

DESCRIPTION OF SYMBOLS 1... 3-phase AC power supply, 2... Start switch, 3... Rectifier circuit, 4... Capacitor, 5... Inverter, 6... Welding transformer, 7... Diode, 8... Junction head, 9... Hall element, 10... Current detector, DESCRIPTION OF SYMBOLS 11... Voltage detection part 12... Pressure detection part 13... Displacement detection part 14... Control part 15... Storage part 16... Display with a touch-panel function 20... Power supply 21... Main-body part 80a, 80b... Electrode , 82a, 82b --- pressure mechanism, 83 --- object to be joined, 140 --- operation input section, 141 --- joining control section, 142 --- display control section, 143 --- graph generation section.

Claims (7)

a main body for bonding objects to be bonded;
a display device with a touch panel function that displays information and accepts user operations at the same time;
an operation input unit that receives a user's setting operation for the display device with a touch panel function;
a display control unit that displays a setting screen for bonding of the object to be bonded on the display device with a touch panel function, and updates the setting screen according to the user's setting operation;
A welding apparatus, comprising: a welding control section that controls the body section based on the contents set on the setting screen by the user to weld the object to be welded. The joining apparatus according to claim 1,
A welding apparatus, wherein the items set on the setting screen include an item for designating a type of control in which a physical quantity detected during welding is used as a controlled variable. The joining apparatus according to claim 1 or 2,
The items to be set on the setting screen include items for designating a control target value whose control amount is a physical quantity detected during welding, a time to reach the target value, and a holding time for the target value. a joining device comprising: The joining apparatus according to any one of claims 1 to 3,
The welding apparatus, wherein the items set on the setting screen can be set for each phase obtained by dividing the process of welding the objects to be welded. The joining apparatus according to claim 4,
A joining apparatus, wherein the items set on the setting screen include an item for designating a control switching condition for shifting to the next phase. The joining apparatus according to any one of claims 1 to 5,
The joining apparatus, wherein the items set on the setting screen include an item for designating signal output to the main body. The joining apparatus according to any one of claims 1 to 6,
further comprising a graph generation unit that generates a graph representing a transition of physical quantities related to the objects to be welded that are being welded based on the content set on the setting screen by the user;
The joining device, wherein the display control unit displays the graph generated by the graph generation unit on a screen of the display device with a touch panel function.

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