KR970009962A - Inverter type resistance welding control device - Google Patents

Inverter type resistance welding control device Download PDF

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Publication number
KR970009962A
KR970009962A KR1019960014194A KR19960014194A KR970009962A KR 970009962 A KR970009962 A KR 970009962A KR 1019960014194 A KR1019960014194 A KR 1019960014194A KR 19960014194 A KR19960014194 A KR 19960014194A KR 970009962 A KR970009962 A KR 970009962A
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KR
South Korea
Prior art keywords
current
value
inverter
welding
current measurement
Prior art date
Application number
KR1019960014194A
Other languages
Korean (ko)
Inventor
교지 모로
Original Assignee
죠지 다까시
미야찌테크노스 가부시키가이샤
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 죠지 다까시, 미야찌테크노스 가부시키가이샤 filed Critical 죠지 다까시
Publication of KR970009962A publication Critical patent/KR970009962A/en

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Classifications

    • 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
    • B23K11/252—Monitoring devices using digital means
    • B23K11/257—Monitoring devices using digital means the measured parameter being an electrical current
    • 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
    • B23K11/241—Electric supplies
    • 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
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
    • B23K31/125—Weld quality monitoring

Abstract

본 발명은 전류 리미터 제어 상황을 모니터하는 기능을 구비하여, 품질 관리 및 생산성 향상을 도모하고자 함을 그 목적으로 하며, 상기한 목적을 해결하기 위한 수단으로서, 각 클록 사이클의 시발에서 CPU(40)는 제어 펄스(CA) 또는 (CB) 상승시켜서, 트랜지스터(18,24) 또는 (20,22)를 온시킨후 비교 회로(56)의 출력 신호에 반응하여, CPU(40)는 제어펄스(Ca) 또는 (Cb) 하강시켜서, 트렌지스터(18,24) 또는 (20,22)를 오프시킴과 동시에, CPU(40)는, 그 시점에서의 전류 검출 신호(Si)의 레벨을 샘플링·홀드 회로(54) 및 A-D변환기(58)를 통하여 받아 들여, 전류 측정치로서 기억부(64)의 소정 기억 위치에 저장시키며, 용접 통전 종료후, CPU(40)는 기억부(64)에 저장되어 있는 전(全)사이클 분량의 전류 측정치에 대한 평균치를 구하고, 이 평균치를 토대로 용접 양부(良否)의 판정을 수행한다.An object of the present invention is to provide a function of monitoring a current limiter control status to improve quality control and productivity. As means for solving the above-mentioned object, The CPU 40 raises the control pulse C A or C B and turns on the transistors 18 and 24 or 20 and 22 in response to the output signal of the comparison circuit 56, (C a), or (C b) by lowering, transistor (18,24) or the (20,22) off Sikkim and at the same time, CPU (40), the sampling of the level of the current detection signal (Si) at that time The holding circuit 54 and the A / D converter 58 and stores them as a current measurement value in a predetermined storage position of the storage unit 64. After the completion of the welding current, the CPU 40 stores the data in the storage unit 64 The average value of the current measurement values of all the cycles is obtained, and based on this average value, .

선택도 제1도.Selection chart 1 also.

Description

인버터식 저항용접 제어장치Inverter type resistance welding control device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제1도는 본 발명의 일 실시예에 의한 인버터식 저항용접 제어장치의 회로 구성을 나타내는 블록도이다.FIG. 1 is a block diagram showing a circuit configuration of an inverter type resistance welding control apparatus according to an embodiment of the present invention.

제2도는 실시예의 인버터식 저항용접 제어장치에 있어서의 전류 리미터 기능 및 모니터 기능을 설명하기 위한 각 부분의 신호 파형을 나타내는 도면이다.2 is a diagram showing signal waveforms of respective parts for explaining the current limiter function and the monitor function in the inverter type resistance welding control apparatus of the embodiment.

제3도는 실시예의 인버터식 저항용접 제어장치에 있어서 CPU의 용접 통전중의 주된 처리를 나타내는 도면이다.Fig. 3 is a view showing the main processing during welding energization of the CPU in the inverter type resistance welding control apparatus of the embodiment. Fig.

제4도는 실시예의 인버터식 저항용접 제어장치에 있어서 CPU의 용접 통전 직후의 주된 처리를 나타내는 도면이다.Fig. 4 is a view showing the main processing immediately after welding of the CPU in the inverter type resistance welding control apparatus of the embodiment. Fig.

제5도는 실시예의 인버터식 저항용접 제어장치에 있어서 표시부의 디스플레이에 표시되는 주된 화면을 나타내는 도면이다.5 is a view showing a main screen displayed on the display of the display unit in the inverter type resistance welding control apparatus of the embodiment.

Claims (3)

인버터(inverter)식 저항용접기의 1차측 또는 2차측 전류를 소망하는 설정 전류치에 거의 일치되도록 인버터의 스윗칭 동작을 제어하는 인버터식 저항용접 제어장치에 있어서, 상기 인버터의 스윗칭 동작의 단위 사이클을 규정하는 클록 펄스를 발생시키는 클록 회로와, 상기 설정 전류치에 대응한 소정의 리미터 레벨을 설정하는 리미터 레벨 설정 수단과, 용접 통전중에 상기 전류를 검출하는 전류 검출 수단과, 각 클록 사이클에 있어서, 상기 클록 펄스의 시발에 반응하여 상기 인버터를 스윗칭 · 온시키고, 상기 전류 검출 수단의 출력 신호가 상기 리미터 레벨에 도달한 시점 또는 상기 클록 펄스의 종단에서 상기 인버터를 스윗칭·오프시키는 인버터제어 수단과, 상기 인버터를 스윗칭 · 오프한 각 시점에 있어서의 상기 전류치를 측정하는 전류 측정 수단과, 용접 통전중에 상기 전류 측정 수단에서 얻어진 상기 전류 측정치 데이타를 기초로 용접의 양부(良否)를 판정하는 용접 양부 판정 수단과, 상기 용접 양부 판정 수단의 판정 결과를 출력하는 판정 결과 출력수단을 구비하는 것을 특징으로 하는 인버터식 저항용접 제어장치.An inverter type resistance welding control apparatus for controlling a switching operation of an inverter so that a primary side or a secondary side current of an inverter type resistance welding machine substantially matches a desired set current value, A limiter level setting means for setting a predetermined limiter level corresponding to the set current value; a current detecting means for detecting the current during the welding energization; Inverter control means for switching and turning on the inverter in response to the start of the clock pulse and for switching the inverter at the time point when the output signal of the current detection means reaches the limiter level or at the end of the clock pulse , A current measurement for measuring the current value at each time point of switching and turning off the inverter And a determination result outputting means for outputting a determination result of the welding right and left determining means, based on the current measurement data obtained by the current measuring means during welding energization, Wherein the inverter-type resistance welding control device comprises: 제1항에 있어서, 용접 양부 판정 수단은, 용접 통전중에 전류 측정 수단으로부터 얻어진 전류 측정치의 평균치를 구하는 평균치 연산 수단과, 양부 판정을 위한 감시치를 설정하는 감시치 설정 수단과, 상기 평균치 연산 수단에서 구하여진 상기 평균치를 상기 감시치와 비교하는 비교 수단을 포함하는 것을 특징으로 하는 인버터식 저항용접 제어장치.The welding apparatus according to claim 1, characterized in that the welding goodness determining means comprises: average value calculating means for obtaining an average value of the current measurement values obtained from the current measuring means during welding energization; monitor value setting means for setting a monitoring value for both- And comparison means for comparing the obtained average value with the monitored value. 상용(商用) 교류를 정류하여 직류로 만들고, 이 직류를 인버터에 의해 소정 주파수의 교류 펄스로 변환시키며, 이 교류 펄스를 용접 트랜스에 통과시킨 후 정류기에서 다시 직류로 만들고, 이 직류를 용접 전극을 통하여 파용접재에 공급하도록 한 인버터식 저항용접기의 제어장치에 있어서, 상기 저항용접기의 1차측 전류를 측정하는 1차 전류 측정수단과, 상기 1차 전류 측정수단에 의해 얻어진 1차 전류 측정치를 설정 전류치보다 작고, 또한 상기 용접 트랜스의 여자(勵磁) 전류보다 큰 값으로 선택된 소정의 감시치와 비교하고, 그 비교결과에 기초하여 상기 저항용접기의 2차측에 있어서의 무통전(無痛電)이상사태를 검출하는 무통전 검출 수단을 구비하는 것을 특징으로 하는 인버터식 저항용접 제어장치.The commercial AC alternating current is rectified into a direct current, and the direct current is converted into an alternating current pulse of a predetermined frequency by an inverter. After passing the alternating current pulse through a welding transformer, the direct current is again made into a direct current in the rectifier, The welding apparatus according to any one of claims 1 to 3, further comprising: a primary current measurement unit that measures a primary current of the resistance welder; and a primary current measurement unit that sets a primary current measurement value obtained by the primary current measurement unit (Non-charge voltage) or more at the secondary side of the resistance welder based on the comparison result, and comparing the measured value with a predetermined monitoring value that is smaller than the current value and larger than the excitation current of the welding transformer, And a non-interruption detecting means for detecting an abnormality. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960014194A 1995-08-02 1996-05-02 Inverter type resistance welding control device KR970009962A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP95-216717 1995-08-02
JP21671795A JP3259012B2 (en) 1995-08-02 1995-08-02 Inverter type resistance welding control device

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KR970009962A true KR970009962A (en) 1997-03-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040034144A (en) * 2002-10-21 2004-04-28 위니아만도 주식회사 A sealing structure for door of kim-chi storage
KR101140119B1 (en) * 2009-10-08 2012-04-30 주식회사 효성 Inverter resistance welder and method for controlling thereof

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100256665B1 (en) * 1997-10-07 2000-05-15 이종묵 Spot welding monitoring system
WO2000059672A1 (en) * 1999-04-01 2000-10-12 Erdogan Karakas Resistance welding method and device
JP2001321959A (en) * 2000-05-12 2001-11-20 Sekisui Chem Co Ltd Nondestructive testing method for projection welding
JP2002103052A (en) * 2000-09-27 2002-04-09 Miyachi Technos Corp Joining apparatus
JP4554501B2 (en) * 2005-01-18 2010-09-29 ファナック株式会社 Motor insulation resistance deterioration detection method, insulation resistance deterioration detection device, and motor drive device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040034144A (en) * 2002-10-21 2004-04-28 위니아만도 주식회사 A sealing structure for door of kim-chi storage
KR101140119B1 (en) * 2009-10-08 2012-04-30 주식회사 효성 Inverter resistance welder and method for controlling thereof

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Publication number Publication date
JP3259012B2 (en) 2002-02-18
JPH0947883A (en) 1997-02-18

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