KR20160065331A - The appratus of hybrid sensing to measure current and pressure in resistance welding - Google Patents

The appratus of hybrid sensing to measure current and pressure in resistance welding Download PDF

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Publication number
KR20160065331A
KR20160065331A KR1020140168735A KR20140168735A KR20160065331A KR 20160065331 A KR20160065331 A KR 20160065331A KR 1020140168735 A KR1020140168735 A KR 1020140168735A KR 20140168735 A KR20140168735 A KR 20140168735A KR 20160065331 A KR20160065331 A KR 20160065331A
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South Korea
Prior art keywords
current
strain gage
pressing force
unit
electric resistance
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KR1020140168735A
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Korean (ko)
Inventor
이동환
한윤종
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몬트롤 주식회사
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Publication of KR20160065331A publication Critical patent/KR20160065331A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/24—Electric supply or control circuits therefor
    • B23K11/25—Monitoring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/24—Electric supply or control circuits therefor
    • B23K11/25—Monitoring devices
    • B23K11/251—Monitoring devices using analog means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/36—Auxiliary equipment

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Welding (AREA)

Abstract

The present invention provides a portable hybrid sensing apparatus for monitoring the quality control of resistance welding, which is easily installed between a pair of electrodes of an electric resistance welding machine to be measured regardless of a place as the apparatus is composed of a hybrid current-pressure (CP) measuring module (100) and a signal processing box module (200), and has an annular current sensor part which can apply an electric current having a large capacity of 4 to 100 KA.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a portable hybrid sensing device for monitoring quality of resistance welding,

In the present invention, the electric resistance welding machine is placed between a pair of electrodes while carrying it. The current and the pressing force applied by the electric resistance welding machine are energized and measured simultaneously in one device. The measured current data and pressing force data are filtered, To a portable hybrid sensing device for resistance welding quality control monitoring in which current data and pressing force data are transmitted to a connected external device.

Generally, in spot welding and projection welding which are most applied among resistance welding, there is no simple method of confirming the welding quality by the non-destructive inspection method.

As a result, the welding current, the energizing time, and the pressing force, which are known as the three major factors of spot welding and projection welding, are appropriately set so as to optimally control these elements so as not to cause quality defects.

On the other hand, at the time of spot welding, the electrode made of the copper alloy is formed so that the diameter of the tip end portion is smaller than the diameter of the body side. However, since the diameter of the electrode tip increases at every welding spot, the calorific value Q decreases even when the same current flows The strength of the welded portion is lowered.

In addition, if the pressing force is lowered among the three factors, even if the same current flows, the current density becomes higher and the heat quantity is increased, resulting in welding failure due to tingling of the tile.

In addition, if the welding portion is not sufficiently bonded, the electrical resistance of the welding portion is not sufficiently lowered. As a result, the voltage value is largely monitored. Therefore, it is required to observe the welding portion voltage at the time of welding, that is, the voltage change between the electrodes.

Therefore, during resistance welding, continuous monitoring of current, voltage, energizing time, and pressing force is required while welding.

When a defect occurs, only the fact of occurrence of a defect is recognized, and there is a problem that information on the cause is insufficient, and efforts to improve the defect are greatly increased.

In order to solve such a problem, in Korean Patent Laid-Open Publication No. 2003-0083650, there is provided an image processing apparatus including a detection means, a signal processing means, a storage means, a control means, a user interface means, , The pressing force and the electrode displacement are monitored by one monitoring means at the same time,

This is because only the pressing force sensing means is constituted, and there is no device for simultaneously sensing the pressing force and the current to one device and delivering it to the external device (monitoring system). Therefore, it takes a long time to measure, It is difficult to measure the pressing force and the current of the same reference value at the time of electric resistance welding because the conditions and the environment of the actual electric resistance welding are different at the time of measurement.

In addition, since the pressing force detecting device and the current detecting device must be separately provided, there is a problem that the volume is also increased.

Further, since a very large capacity is energized at 4KA to 100KA at the time of welding, a separate current sensing means corresponding thereto must be developed.

Korean Unexamined Patent Publication No. 2003-0083650

In order to solve the above problems, in the present invention, it is easy to carry and can be easily installed between a pair of electrodes of an electric resistance welding machine to be measured without regard to a place, and a large capacity of 4KA to 100KA It is possible to provide the annular current sensor unit and simultaneously measure the current and the pressing force applied by the electric resistance welder to one device while conducting the current measurement and filter the measured current data and the pressing force data, The present invention is directed to a portable hybrid sensing apparatus for monitoring resistance welding quality control capable of transmitting current data and pressing force data to a sensor.

To achieve the above object, a portable hybrid sensing apparatus for resistance welding quality control monitoring according to the present invention comprises:

And a device for sensing a pressing force and a current of an electric resistance welder made up of a transformer, a pair of electrodes, and a pressing means,

A hybrid type CP (Current / Pressure) measuring module 100 positioned between a pair of electrodes of the electric resistance welder for measuring current and pressure applied to the electric resistance welder to one device at the same time,

And a signal processing box module 200 connected to the downstream end of the hybrid type CP measuring module for filtering current data and pressing force data measured by the hybrid type CP measuring module and then transmitting current data and pressing force data to connected external devices ≪ / RTI >

INDUSTRIAL APPLICABILITY As described above, in the present invention, it is easy to carry, and can be easily installed between a pair of electrodes of an electric resistance welder to be measured without regard to a place, and a large capacity of 4KA to 100KA can be energized, It can be applied to an electric resistance welder having a range of energization and is excellent in compatibility. The current and the pressing force applied in the electric resistance welder can be energized and measured simultaneously in one device, and the measured current data and pressing force data are filtered The welding current, the welding voltage, the pressing force, and the electrode displacement can be simultaneously measured, and the welding current, the welding voltage, the pressing force, and the electrode displacement can be measured at the same time, Can be connected to an external device and monitored at the same time, and when an actual welding failure occurs, To provide information on whether the amount can be compared and analyzed the welding characteristics at a glance is a good effect to improve the weld quality than the traditional 80%.

1 is a configuration diagram showing components of a portable hybrid sensing apparatus 1 for resistance welding quality control monitoring according to the present invention,
2 is a perspective view showing components of a portable hybrid sensing apparatus 1 for resistance welding quality control monitoring according to the present invention,
3 is an external perspective view showing components of a hybrid CP (current / pressure) measurement module 100 according to the present invention,
4 is an external perspective view showing components of the " Y "shaped twin head portion 110 and the annular current sensor portion 120 according to the present invention,
5 is a side view showing a first insertion sealing groove 111b formed on one side of the first "Y" -shaped pressing portion according to the present invention and a second insertion sealing groove 112b ) Is formed so that the full bridge type strain gauge portion is inserted,
6 is a block diagram showing the components of the signal processing box module according to the present invention,
7 is a circuit diagram showing components of a pressing force signal processing unit according to the present invention,
8 is a circuit diagram showing components of a current signal processing unit according to the present invention,
FIG. 9 is a graph showing an operation process of the annular current sensor unit according to the present invention,
10 is a circuit diagram showing components of a full bridge type strain gauge according to the present invention,
Fig. 11 is a graph showing the results of measurement of the resistance welding quality of a portable hybrid sensing apparatus for resistance welding quality control monitoring according to the present invention, which is placed between a pair of electrodes of an electric resistance welder, In one embodiment,
12 is a view showing a state where the signal processing box module 200 is reduced to 1/5 to 1/20 of the normal size at one side of the internal space of the portable grip portion of the hybrid CP (current / pressure) measurement module 100 according to the present invention One embodiment showing a slim built-in configuration is also shown.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing components of a portable hybrid sensing device 1 for resistance welding quality control monitoring according to the present invention, and FIG. 2 is a block diagram of a portable hybrid sensing device for resistance welding quality control monitoring FIG. 1 is a perspective view illustrating components of a hybrid type CP (Current / Pressure) measurement module 100 and a signal processing box module 200 according to an embodiment of the present invention.

First, a hybrid CP (Current / Pressure) measurement module 100 according to the present invention will be described.

The hybrid type CP (Current / Pressure) measuring module 100 is positioned between a pair of electrodes of an electric resistance welder, and performs a function of simultaneously energizing and applying a current and a pressing force applied by an electric resistance welder to one device .

3 and 4, the Y-shaped twin head unit 110, the annular current sensor unit 120, the full-bridge strain gage unit 130, the communication line unit 140, (150), and a portable handle (160).

First, the "Y" shaped twin head portion 110 according to the present invention will be described.

The twin head unit 110 has a twin structure and is positioned between a pair of electrodes of an electric resistance welder. The twin head unit 110 is electrically connected to an annular current sensor unit And transmits the pressing force applied by the electric resistance welder to the full bridge type strain gage portion.

As shown in Fig. 4, this is constituted by a first "Y" -shaped energization pressing portion 111 and a second "Y" -shaped energizing pressing portion 112. [

The first "Y" -shaped pressing portion 111 is formed in a "Y" shape and is placed on top of the second "Y" And receives the current and the pressing force applied by the electric resistance welder.

4, a first concave groove 111a is formed at one side of the head portion so as to be in point contact and surface contact with either one of a pair of electrodes of the electric resistance welder, The first insertion sealing groove 111b is formed by inserting the full bridge type strain gage portion on one side of the side surface as shown in Fig.

The first insertion sealing groove 111b is formed with a first gage line through groove on one side of the inner space, and a gage line of the full bridge type strain gage unit which is inserted and sealed in the first gage line passing groove is connected to the communication line unit .

The first "Y-shaped energizing pressurizing portion is formed with a conductive member 111c made of copper (Cu) at a contact portion in contact with the second" Y "

The second "Y" -shaped pressing portion 112 is formed in a "Y" shape and is placed at the lower end of the first "Y" And receives the current and the pressing force applied by the electric resistance welder.

This is because a second concave groove is formed on one side of the head portion so as to be in point contact and surface contact with either one of a pair of electrodes of the electric resistance welder, and as shown in Fig. 5, a full bridge type strain gauge And a second insertion sealing groove 112b is formed by sealing a portion to be sealed.

The second insertion seal groove has a second gauge line through groove 112b formed at one side of the inner space, and a gauge line of the full bridge type strain gauge portion inserted and sealed in the second gauge line through groove is connected to the communication line portion .

Second, the annular current sensor unit 120 according to the present invention will be described.

The annular current sensor unit 120 is formed in an annular shape at the tip end of the Y-shaped twin head unit and senses a current of the electric resistance welder transmitted from the Y-shaped twin head unit.

This consists of a current transformer that senses the primary current by measuring the secondary current by winding the primary and secondary coils around the core using a donut-shaped core.

Then, an annular protective cover is formed outside the current transformer.

The annular current sensor unit 120 has a low noise analog signal path, an internal resistance of 8.3 mΩ, a current measurement of 0 to 5 A at a 5 V sensor output voltage proportional to AC and DC current, a 255 mV / A High Sensitivity, 3 ~ 12V operating voltage, 3mA current consumption, almost zero magnetic hysteresis, and 10K Hz bandwidth.

That is, when the current does not flow, the output voltage of the annular current sensor unit becomes 1 / 2VDD. When a current larger than 1/2 VDD is output as shown in FIG. 9, A voltage smaller than 1/2 VDD is output.

In the case of the AC current, the voltage swinging to the center of 1/2 VDD is outputted. In this case, the calculation of the current is configured to measure the RMS voltage of the swing voltage into the current value.

Third, the full bridge type strain gage unit 130 according to the present invention will be described.

The full-bridge type strain gage unit 130 is formed on the side of the front end of the Y-shaped twin head unit and serves to sense the pressing force of the electric resistance welder transmitted from the Y-shaped twin head unit.

It consists of a first strain gage (R C1 ) 131, a second strain gage (R T1 ) 132, a third strain gage (R C2 ) 133 and a fourth strain gage (R x ) do.

The first strain gage R C1 131 and the second strain gage R T1 132 are formed on one side of the upper side of the Y-shaped twin head portion, and the first strain gage R C1 131 (R C2 ) 133 and a fourth strain gage (R x ) 134 on the same line where the second strain gage (R T1 ) 132 and the second strain gage after formed on the side surface side, the being one strain gauge (R C1) (131) is connected to a third strain gage (R C2) is selected and any one of 133, and the fourth strain gages (R x) (134), The second strain gage (R T1 ) 132 is selectively connected to either the third strain gage (R C2 ) 133 and the fourth strain gage (R x ) 134, And is configured to sense the resistance value.

So first a strain gauge (R C1) (131), a third strain gauge (R C2), (133) and a fourth strain gauge being (R x) connected in selected with any of 134, the second strain gauge ( R T1 ) 132 is selectively connected to any one of the third strain gage (R C2 ) 133 and the fourth strain gage R x 134 because the first strain gage R C1 131 ), A second strain gage (R T1 ) 132, a third strain gage (R C2 ) 133, and a fourth strain gage (R x ) 134 are connected to each other to form a full bridge shape, So as to sense the pressing force of the welding machine as a fine resistance value.

As shown in FIG. 10, if no current flows through the galvanometer G, the following conditions (1) and (2) are satisfied.

Figure pat00001

Figure pat00002

Here, since I g = 0, I 1 = I 3 and I 2 = I x .

Therefore, equation (1) is expressed by the following equation (3).

Figure pat00003

Here, the equation (2) is divided by the equation (3) to be expressed as the following equations (4) and (5).

Figure pat00004

or

Figure pat00005

. Therefore, the fourth strain gage (R x ) resistance can be calculated by measuring R C1 , R T1 , and R T2 .

In the present invention, a BALCO GAGE is connected between the first strain gauge and the third strain gage, as shown in FIG. 10, with the fourth strain gauge (R x ) , Set 30Ω, 60Ω, and 80Ω to set the output compensation resistor R1 to output 2mV and set the input resistance and output resistance near 350Ω at the terminal compensation resistor R2.

Thus, the first strain gage (R C1 ) 131, the second strain gage (R T1 ) 132, the third strain gage (R C2 ) 133, the fourth strain gage R x ) 134 are connected to each other to form a full bridge shape, and the pressing force of the electric resistance welder is sensed as a fine resistance value.

Fourth, the communication line unit 140 according to the present invention will be described.

The communication line unit 140 is disposed on one side of the output end of the annular current sensor unit and on one side of the output end of the full bridge type strain gage unit and detects the current sensing value measured by the annular current sensor unit and the current sensing value measured by the full bridge type strain gage unit Value to the signal processing box module.

Fifth, the outer cover 150 according to the present invention will be described.

The outer cover 150 protects and supports each device from external pressure.

It is made of plastic material or SUS material with excellent heat dissipation and durability.

Sixth, the portable grip 160 according to the present invention will be described.

The portable handgrip 160 is located at a rear end of the outer cover 150 to form a handle for easy portability.

Next, the signal processing box module 200 according to the present invention will be described.

The signal processing box module 200 is connected to the downstream end of the hybrid type CP measuring module to filter the current data and the pressing force data measured by the hybrid type CP measuring module and then transmit the current data and the pressing force data to the connected external device It plays a role.

6, the box body 210, the pressing force signal processing unit 220, and the current signal processing unit 230 are constituted.

First, the box body 210 according to the present invention will be described.

The box body 210 has a rectangular box shape and protects each device from external pressure.

It is made of aluminum alloy material or plastic material which is good in heat dissipation and durability.

Secondly, the pressing force signal processing unit 220 according to the present invention will be described.

The pressing force signal processing unit 220 is located at one side of the inner space of the box body. The pressing force signal processing unit 220 receives the voltage value converted from the full bridge strain gage through the communication line and amplifies the amplified voltage signal, It is a role to convey.

As shown in FIG. 7, the first input connector 221, the first amplifier 222, the constant current circuit portion 223, the first current converter portion 224, and the first external connection connector portion 225 are constituted by the first input connector 221, the first amplifier 222, do.

The first input connector 221 is connected to the communication line unit.

The first amplifier 222 receives and amplifies the voltage converted from the full bridge strain gage from the first input connector.

It consists of INA125 devices and is driven by 2.5V, 5V, 10V select voltage and has the characteristics of precision amplification with ± 0.5% (max) with ± 35ppm / ° C drift (max).

The constant current circuit 223 serves to generate and supply a constant voltage to each device.

This produces a constant voltage of 15V.

The first current converter unit 224 converts the voltage amplified by the first amplifier into a current and generates first current data according to the pressing force of the electric resistance welder, and then transmits the first current data to the first external connection connector unit.

The first external connection connector unit 225 connects and connects with an external device.

It consists of USB connection jack and RS232, RS485 connection pin.

And it is connected with external device composed of monitoring system.

Third, the current signal processing unit 230 according to the present invention will be described.

The current signal processing unit 230 is located on one side of the pressing force signal processing unit. The current signal processing unit 230 receives the current sensed by the annular current sensor unit through a communication line and amplifies the amplified current signal, .

8, the second input connector section 231, the second amplifier 232, the integrator 233, the second current converter section 234, and the second external connection connector section 235 are constituted as shown in FIG. do.

The second input connector part 231 is connected to the communication line part.

The second amplifier 232 receives the converted current from the annular current sensor unit from the second input connector and amplifies the amplified current.

The integrator 233 low-pass-filters the current amplified by the second amplifier through an integration circuit.

The second current converter 234 converts the low-pass filtered integrated value into a current value to generate second current data corresponding to the current of the electric resistance welder, and then transmits the generated second current data to the second external connection connector do.

The second external connection connector unit 235 connects and connects with an external device.

It consists of USB connection jack and RS232, RS485 connection pin.

And it is connected with external device composed of monitoring system.

2, the portable hybrid sensing apparatus for resistance welding quality control monitoring according to the present invention includes a signal processing box module (hereinafter, referred to as " external " 12, one side of the internal space of the "Y" -shaped twin head portion of the hybrid type CP (Current / Pressure) measuring module 100 and one side of the internal space of the portable handgrip, The module 200 is slimly built in and reduced to a size of 1/5 to 1/20 of the normal size.

Hereinafter, a specific operation process of the portable hybrid sensing apparatus for resistance welding quality control monitoring according to the present invention will be described.

First, a hybrid CP (Current / Pressure) measurement module 100 is placed between a pair of electrodes of an electric resistance welder.

Next, a monitoring system, which is an external device, is connected to the first external connecting connector portion and the second external connecting connector portion of the signal processing box module.

Next, electric current is applied to the electrode of the electric resistance welder while pressing it to the hybrid CP (Current / Pressure) measurement module.

Next, as shown in FIG. 11, current and pressure are applied to the electric resistance welder through a hybrid CP (Current / Pressure)

Finally, the voltage value converted by the full bridge strain gauge of the hybrid type CP measurement module is received and amplified through the pressing force signal processing unit of the signal processing box module, and then converted into the first current data, And at the same time, the current value sensed by the annular current sensor unit through the current signal processing unit of the signal processing box module is received through the communication line, amplified, and then converted into second current data through the integrator, (Monitoring system).

Here, the full bridge type strain gauge portion is formed such that the first strain gauge C1 and the second strain gauge T1 are formed on one side of the upper side of the "Y" shaped twin head portion and the first strain gauge C1 and the second strain gauge After the third strain gauges C2 and the fourth strain gauges T2 are formed on one side of the lower side of the "Y" shaped twin head portion on the same line where the gauge T1 is located, The second strain gauge T1 is selected from any one of the third strain gauge C2 and the fourth strain gauge T2 and the second strain gauge T1 is selected and connected to any one of the gauge C2 and the fourth strain gauge T2, And the pressing force of the electric resistance welder is sensed by the resistance value.

The annular current sensor unit senses a current of the electric resistance welder.

As described above, the portable hybrid sensing apparatus for resistance welding quality control monitoring according to the present invention can simultaneously measure the pressing force through the full bridge type strain gauge unit and the current through the annular current sensor unit in one apparatus.

As a result, the full-bridge type strain gauge unit can measure loads close to 2 tons, apply the automatic welding system to measure the load on the welding, and provide reference pressure data for welding at a constant load have.

In addition, the annular current sensor unit incorporates a current sensor because a load must be changed according to the current capacity, and current can be detected even at a very large capacity of 4KA to 100KA.

One ; Portable hybrid sensing device for resistance welding quality control monitoring
100: Hybrid type CP (Current / Pressure) measurement module
110: "Y" type twin head part 120: annular current sensor part
130: full bridge type strain gage part 140: communication line part
150: outer cover 160: portable handle
200: Signal processing box module

Claims (5)

An apparatus for sensing a pressing force and a current of an electric resistance welder comprising a transformer, a pair of electrodes, and a pressing means,
A hybrid type CP (Current / Pressure) measuring module 100 positioned between a pair of electrodes of the electric resistance welder for measuring current and pressure applied to the electric resistance welder to one device at the same time,
And a signal processing box module 200 connected to the downstream end of the hybrid type CP measuring module for filtering current data and pressing force data measured by the hybrid type CP measuring module and then transmitting current data and pressing force data to connected external devices Wherein the resistance welding quality control monitoring device is a portable hybrid sensing device for resistance welding quality control monitoring.
The hybrid CP measurement module (100) of claim 1, wherein the hybrid CP measurement module
Y "shape of a twin structure. It is positioned between a pair of electrodes of an electric resistance welder, and conducts the electric current applied by the electric resistance welder to the annular current sensor unit. The pressing force applied by the electric resistance welder is transmitted to the full bridge Shaped strain gage section, a "Y " shaped twin head section 110,
An annular current sensor part 120 formed in an annular shape at the tip of the "Y " shaped twin head part and sensing a current of the electric resistance welder delivered from the" Y "
A full bridge type strain gauge section 130 formed at the tip side of the "Y " shaped twin head section for sensing the pressing force of the electric resistance welder transmitted from the" Y "twin head section,
The current sensing value measured by the annular current sensor unit and the pressure sensing value measured by the full bridge type strain gage unit are transmitted to the signal processing box module, which is located on one side of the output stage of the annular current sensor unit and one side of the output stage of the full bridge type strain gage unit. A communication line unit 140,
An outer cover 150 for protecting and supporting each device from external pressure,
And a portable grip part (160) positioned at a rear end of the outer cover (150) and having a grip for easy portability.
The strain gauge of claim 2, wherein the full-bridge strain gauge portion
A first strain gage (R C1) (131) and a second strain gauge (R T1) (132) is formed in the "Y" shaped twin-head side upper side portion, a first strain gauge (R C1) (131) and A third strain gage (R C2 ) 133 and a fourth strain gage (R x ) 134 on the same side as the second strain gage (R T1 ) 132 are located on one side of the lower side of the "Y" after formed, the first being one strain gauge (R C1) (131) is connected to a third strain gage (R C2) is selected and any one of 133, and the fourth strain gages (R x) (134), a second The strain gage (R T1 ) 132 is selectively connected to any one of the third strain gage (R C2 ) 133 and the fourth strain gage (R x ) 134, And the sensor is configured to sense the resistance welding quality of the portable hybrid sensing device.
2. The apparatus of claim 1, wherein the signal processing box module (200)
A box body 210 which is formed in a rectangular box shape and protects each device from external pressure,
A pressing force signal processing unit 220 located at one side of the inner space of the box body and transmitting the voltage value converted by the full bridge strain gage through a communication line and amplifying the amplified voltage, Wow,
A current signal processing unit 230 located at one side of the pressing force signal processing unit for receiving the current value sensed by the annular current sensor unit through a communication line and amplifying the amplified current signal and then converting the amplified current to second current data through an integrator, ) For monitoring resistance welding quality control. ≪ RTI ID = 0.0 > 11. < / RTI >
5. The apparatus of claim 4, wherein the pressing force signal processing unit (220)
A first input connector 221 connected to the communication line unit,
A first amplifier 222 for receiving and amplifying the voltage converted from the full bridge strain gage from the first input connector,
A constant current circuit unit 223 for generating and supplying a constant voltage to each device,
A first current converter unit 224 for converting the voltage amplified by the first amplifier into a current and generating the first current data according to the pressing force of the electric resistance welder and then transmitting the generated first current data to the first external connection connector unit,
And a first external connector (225) connected to and connected to an external device.
KR1020140168735A 2014-11-28 2014-11-28 The appratus of hybrid sensing to measure current and pressure in resistance welding KR20160065331A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109108445A (en) * 2018-11-05 2019-01-01 南京菲斯特焊接科技有限公司 A kind of suspension type electric resistance electric arc welder welding process parameter monitor and monitoring method
CN109664009A (en) * 2019-01-25 2019-04-23 武汉百舸自动化工程有限责任公司 A kind of feed forward type quality of resistance welds monitoring system and method
EP4289543A1 (en) * 2022-06-08 2023-12-13 Kistler Holding AG Device for measuring the welding force and for detecting the electric welding voltage during a welding process of a resistance welding device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030083650A (en) 2003-10-01 2003-10-30 이광원 Monitoring system for resistance welding

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030083650A (en) 2003-10-01 2003-10-30 이광원 Monitoring system for resistance welding

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109108445A (en) * 2018-11-05 2019-01-01 南京菲斯特焊接科技有限公司 A kind of suspension type electric resistance electric arc welder welding process parameter monitor and monitoring method
CN109664009A (en) * 2019-01-25 2019-04-23 武汉百舸自动化工程有限责任公司 A kind of feed forward type quality of resistance welds monitoring system and method
CN109664009B (en) * 2019-01-25 2021-05-18 武汉百舸自动化工程有限责任公司 Feedforward type resistance welding quality monitoring system and method
EP4289543A1 (en) * 2022-06-08 2023-12-13 Kistler Holding AG Device for measuring the welding force and for detecting the electric welding voltage during a welding process of a resistance welding device

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