CN208772700U - A kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head - Google Patents
A kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head Download PDFInfo
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- CN208772700U CN208772700U CN201820877549.2U CN201820877549U CN208772700U CN 208772700 U CN208772700 U CN 208772700U CN 201820877549 U CN201820877549 U CN 201820877549U CN 208772700 U CN208772700 U CN 208772700U
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- intermediate frequency
- spot welding
- welding head
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- acquisition unit
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Abstract
The utility model discloses a kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head, including data processing module, the input terminal of the data processing module is connected with real-time current acquisition unit, real-time voltage acquisition unit, and output end is connected with display module；The real-time current acquisition unit includes clipping output circuit after the current detection module being sequentially connected in series, integrating circuit, detection and amplifying circuit, filter and amplification, the test side of the current detection module connects the electrode of intermediate frequency pliers spot welding head, the input terminal of the output end connection data processing module of clipping output circuit after the filter and amplification；The electrode of the test side connection intermediate frequency pliers spot welding head of the real-time voltage acquisition unit.It is handled to obtain dynamic electric resistor information according to dynamic current and dynamic electric voltage, then is shown in display module, gain more insight into the influence of welding current, electrode voltage to dynamic electric resistor；And the safety of device can be improved in clipping output circuit after the filter and amplification of real-time current acquisition unit.
Description
Technical field
The utility model relates to intermediate frequency pliers spot welding head fields, and in particular to a kind of dynamic electric resistor detection dress of intermediate frequency pliers spot welding head
It sets.
Background technique
With the development of the raising of industrial automatization, especially auto industry, intermediate frequency resistance spot weld is made extensively
With.For the wear to electrodes situation occurred in intermediate frequency resistance spot weld use process, current increase penalty method is mainly used at present
With electrode dressing method, but all have some limitations.
Resistance spot welding quality is crucial factor in intermediate frequency welding, it by electrode voltage, welding current, dynamic electric resistor,
The restriction of the conditions such as electrode pressure.
Currently used point quality detection has:
(1) based on the detection of welding current: i.e. current constant control method.It is adjusted by PID, adjusts welding current in ideal range
It is interior, guarantee welding quality.But situations such as wearing to electrode pressure variation, electrode material, control effect is poor.
(2) based on the detection of electrode voltage: can directly reflect the state change of welding material in welding process, but need
Welding current is acquired simultaneously, is determined whether that spatter etc. occurs according to the curvilinear motion rate of voltage.
(3) based on the detection of electrode pressure: pressure is too small, it may occur that spatter；Pressure is excessive, then it is small to fuse size.
It needs constantly to adjust welding current to guarantee electrode pressure in reasonable range.
Summary of the invention
Welding is dynamic in simple, highly-safe intermediate frequency soldering turret welding process that the purpose of the utility model is to provide a kind of structures
The detection device of state resistance.
The utility model is achieved through the following technical solutions:
A kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head, including data processing module, the data processing module
Input terminal is connected with real-time current acquisition unit, real-time voltage acquisition unit, and output end is connected with display module；The real-time electricity
Stream acquisition unit include after the current detection module being sequentially connected in series, integrating circuit, detection and amplifying circuit, filter and amplification clipping it is defeated
Circuit out, the test side of the current detection module connect the electrode of intermediate frequency pliers spot welding head, clipping output electricity after the filter and amplification
The input terminal of the output end connection data processing module on road；The test side of the real-time voltage acquisition unit connects intermediate frequency pliers spot welding head
Electrode.
The further scheme of the utility model is that the real-time voltage acquisition unit amplifies electricity by the prime being sequentially connected in series
Road, low-pass filter circuit, detecting circuit and clipping output circuit composition, the input terminal of the preamplifying circuit connect intermediate-frequeney point
The electrode of soldering turret, the input terminal of the clipping output circuit connection data processing module；Clipping output circuit further increases peace
Quan Xing.
The further scheme of the utility model is that the display module is 240128 using SN74HCT573 type latch
Lattice lcd screen, the LE pin of the latch is through the CS-ADR pin of RC filter circuit connection liquid crystal display；It can effectively solve
The flower screen problem of liquid crystal display.
The further scheme of the utility model is that the data processing module also passes through communication module and uploads data, is adopted
Data are uploaded with the form of communication, it is safer than analog signal transmitting data.
The further scheme of the utility model is that the communication module connects data processing mould by photoelectrical coupler
Block；By photoelectric coupler isolation signal, safety is further improved.
The utility model compared with prior art the advantages of be:
Real-time current acquisition unit and real-time voltage acquisition unit acquire the dynamic current of the electrode of intermediate frequency pliers spot welding head respectively
And dynamic electric voltage, it is handled to obtain dynamic electric resistor information through data processing module, then show in display module, deeper into ground
The influence of welding current, electrode voltage to dynamic electric resistor is solved, while can be obtained according to the historical data of dynamic electric resistor optimal
Dynamic resistance curve makes up the deficiency of traditional approach compensation；And clipping output electricity after the filter and amplification of real-time current acquisition unit
The safety of device can be improved in road.
Detailed description of the invention
Fig. 1 is the system structure diagram of the utility model.
Fig. 2 is the current acquisition module in embodiment.
Fig. 3 is integrating circuit.
Fig. 4 is detection and amplifying circuit.
Fig. 5 is clipping output circuit after filter and amplification.
Fig. 6 is feedback resistance switching circuit.
Fig. 7 is real-time voltage acquisition unit.
Fig. 8 is data processing module.
Fig. 9 is communication module.
Figure 10 is display module.
Specific embodiment
A kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head, including data processing module, the data processing module
Input terminal is connected with real-time current acquisition unit, real-time voltage acquisition unit, and output end is connected with display module, also passes through communication
Module uploads data.
The real-time current acquisition unit includes the current detection module, integrating circuit, detection being sequentially connected in series and amplification electricity
Clipping output circuit after road, filter and amplification；The current detection module is looped around as shown in Fig. 2, using Rogowski coil
On the electrode of frequency point soldering turret；The integrating circuit is as shown in figure 3, by operational amplifier U22, potentiometer VR5 and capacitor C122 group
At high-speed switch D6 is input saturation protection, and resistance R139 plays metering function, and capacitor C78 and capacitor C79 are decoupling capacitor.Inspection
Wave and amplifying circuit are as shown in figure 4, wherein operational amplifier U21D, high-speed switch D11, resistance R108, resistance R149 composition are examined
Wave part, operational amplifier U21C, resistance R111, resistance R112, resistance R122 form amplifier section；As shown in figure 5, by operation
Amplifier U32, high-speed switch D7, high-speed switch D8, high-speed switch D9, high-speed switch D10, resistance R104, resistance R130, resistance
The feedback resistance switching circuit of R133, resistance R134, resistance R137, resistance R138, resistance R141, resistance R142 composition, can be with
It realizes the measurement of multiple current gear ranges, more accurately tests the real value of dynamic electric resistor；Clipping output circuit after filter and amplification
As shown in fig. 6, wherein operational amplifier U21A, resistance R172, resistance R173, capacitor C125, capacitor C126 constitute low pass filtered
Wave part, operational amplifier U21B, resistance R153, potentiometer VR4, resistance R175, high-speed switch D14 constitute clipping output section
Point, the input terminal of the output end connection data processing module of clipping output par, c.
The real-time voltage acquisition unit is as shown in fig. 7, the real-time voltage acquisition unit is put by the prime being sequentially connected in series
Big circuit 1, low-pass filter circuit 2, detecting circuit 3 and clipping output circuit 4 form, and the preamplifying circuit 1 is put by operation
Big device U20C, resistance R132, resistance R135, resistance R136, resistance R140, resistance R143, resistance R169, resistance R170 composition,
Two input terminals of operational amplifier U20C electrode through resistance R135, resistance R136 connection intermediate frequency pliers spot welding head respectively is low
Bandpass filter circuit 2 is made of operational amplifier U20D, resistance R31, resistance R32, capacitor C123, capacitor C124, detecting circuit 3
It is made of operational amplifier U20B, resistance R109, resistance R110, resistance R113, resistance R150, high-speed switch D12, clipping output
Circuit 4 by operational amplifier U20A, resistance R114, resistance R115, resistance R151, resistance R123, potentiometer VR6, resistance R174,
High-speed switch D13 composition, the output end of operational amplifier U20A is through the input terminal of resistance R174 connection data processing module.
The data processing module is based on resistance calculations as shown in figure 8, using ATmega128-16AI type single-chip microcontroller
Formula: R=U/I calculates dynamic electric resistor according to the electric current of acquisition, voltage.
The communication module is as shown in figure 9, by chip U35 and photoelectrical coupler PC7, photoelectrical coupler PC8, photoelectric coupling
The welding current of acquisition, electrode voltage and real-time dynamic electric resistor are passed through 485 buses (supporting modus RTU) by the composition such as device PC9
Long-distance Log server is to Central Control Room.
The display module is as shown in Figure 10, is the 240128 lattice lcd screens using SN74HCT573 type latch, shows
Show electric current, voltage and differential resistance values and draws its curve；The LE pin of the latch connects liquid crystal display through RC filter circuit
CS-ADR pin, can effectively solve the problems, such as spend screen.
Claims (5)
1. a kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head, it is characterised in that: including data processing module, at the data
The input terminal of reason module is connected with real-time current acquisition unit, real-time voltage acquisition unit, and output end is connected with display module；Institute
Stating real-time current acquisition unit includes the current detection module being sequentially connected in series, integrating circuit, detection and amplifying circuit, filter and amplification
Clipping output circuit afterwards, the test side of the current detection module connect the electrode of intermediate frequency pliers spot welding head, limit after the filter and amplification
The input terminal of the output end connection data processing module of amplitude output circuit；In the test side connection of the real-time voltage acquisition unit
The electrode of frequency point soldering turret.
2. a kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head as described in claim 1, it is characterised in that: the real-time electricity
Pressure acquisition unit is made of preamplifying circuit, low-pass filter circuit, detecting circuit and the clipping output circuit being sequentially connected in series, institute
The electrode of the input terminal connection intermediate frequency pliers spot welding head of preamplifying circuit is stated, the clipping output circuit connection data processing module
Input terminal.
3. a kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head as described in claim 1, it is characterised in that: the display mould
Block is the 240128 lattice lcd screens using SN74HCT573 type latch, and the LE pin of the latch connects through RC filter circuit
Connect the CS-ADR pin of liquid crystal display.
4. a kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head as described in claim 1, it is characterised in that: at the data
Reason module also passes through communication module and uploads data.
5. a kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head as claimed in claim 4, it is characterised in that: the communication mould
Block connects data processing module by photoelectrical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820877549.2U CN208772700U (en) | 2018-06-07 | 2018-06-07 | A kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820877549.2U CN208772700U (en) | 2018-06-07 | 2018-06-07 | A kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head |
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| Publication Number | Publication Date |
|---|---|
| CN208772700U true CN208772700U (en) | 2019-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820877549.2U Active CN208772700U (en) | 2018-06-07 | 2018-06-07 | A kind of dynamic electric resistor detection device of intermediate frequency pliers spot welding head |
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| CN (1) | CN208772700U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110125527A (en) * | 2019-05-07 | 2019-08-16 | 天津七所高科技有限公司 | Secondary high frequency welding resistance current signal processing system |
| CN110227878A (en) * | 2019-06-27 | 2019-09-13 | 天津七所高科技有限公司 | A kind of method that electric resistance welding equipment detection nut misplaces or loses |
| CN113843490A (en) * | 2021-09-26 | 2021-12-28 | 北京科信机电技术研究所有限公司 | Welding loop closing detection circuit and detection method of resistance welding machine |
-
2018
- 2018-06-07 CN CN201820877549.2U patent/CN208772700U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110125527A (en) * | 2019-05-07 | 2019-08-16 | 天津七所高科技有限公司 | Secondary high frequency welding resistance current signal processing system |
| CN110227878A (en) * | 2019-06-27 | 2019-09-13 | 天津七所高科技有限公司 | A kind of method that electric resistance welding equipment detection nut misplaces or loses |
| CN113843490A (en) * | 2021-09-26 | 2021-12-28 | 北京科信机电技术研究所有限公司 | Welding loop closing detection circuit and detection method of resistance welding machine |
| CN113843490B (en) * | 2021-09-26 | 2022-10-18 | 北京科信机电技术研究所有限公司 | Welding loop closing detection circuit and detection method of resistance welding machine |
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