GB1146907A - Method of and apparatus for the non-destructive testing of spot welds and other pressure welds - Google Patents

Method of and apparatus for the non-destructive testing of spot welds and other pressure welds

Info

Publication number
GB1146907A
GB1146907A GB2559166A GB2559166A GB1146907A GB 1146907 A GB1146907 A GB 1146907A GB 2559166 A GB2559166 A GB 2559166A GB 2559166 A GB2559166 A GB 2559166A GB 1146907 A GB1146907 A GB 1146907A
Authority
GB
United Kingdom
Prior art keywords
unit
welding
workpieces
compared
weld
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB2559166A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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.)
Filing date
Publication date
Priority claimed from US462283A external-priority patent/US3410983A/en
Application filed by Individual filed Critical Individual
Publication of GB1146907A publication Critical patent/GB1146907A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/228—Details, e.g. general constructional or apparatus details related to high temperature conditions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02872—Pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/048—Transmission, i.e. analysed material between transmitter and receiver
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/10—Number of transducers
    • G01N2291/102—Number of transducers one emitter, one receiver
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/267—Welds
    • G01N2291/2672—Spot welding
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/267—Welds
    • G01N2291/2677—Lapp welding

Abstract

1,146,907. Ultrasonic inspection devices. K. DEUTSCH, [trading as KARL DEUTSCH]. 8 June, 1966 [8 June, 1965], No. 25591/66. Heading H4D. In a system for indicating the quality of a weld between two workpieces the flows of ultrasonic energy through the weld zone before and after the welding operation while the workpieces are under pressure are compared. The Fig. 1 embodiment comprises piezoelectric transducers S, E, mounted in coolant passages in the electrodes El (detailed in Fig. 2, not shown) of a spot-welding machine and coupled to transmission pulse generator G and receiving amplifier V. Before the welding operation, a D.C. voltage indicative of the energy of a received pulse train is derived in unit M, stored in storage unit SP and compared with a reference voltage. Any difference between the two voltages is detected by regulator R which is operative before welding to vary the gain of amplifier V and so reduce the difference to zero, thus compensating for disturbances due e.g. to variations in acoustic coupling between the transducers S, E, and the workpieces. Control unit St then initiates and stops the flow of welding current. During cooling of the weld a second D.C. voltage indicative of the energy in a second received pulse train is derived in unit M and compared with the first (stored) D.C. voltage by means of evaluator unit A. Welding parameters may be manually or automatically controlled in accordance with the indications of unit A. Circuit details are given.
GB2559166A 1965-06-08 1966-06-08 Method of and apparatus for the non-destructive testing of spot welds and other pressure welds Expired GB1146907A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US462283A US3410983A (en) 1962-05-23 1965-06-08 Method and apparatus for resistance welding and testing

Publications (1)

Publication Number Publication Date
GB1146907A true GB1146907A (en) 1969-03-26

Family

ID=23835873

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2559166A Expired GB1146907A (en) 1965-06-08 1966-06-08 Method of and apparatus for the non-destructive testing of spot welds and other pressure welds

Country Status (1)

Country Link
GB (1) GB1146907A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284177A1 (en) * 1987-03-09 1988-09-28 General Motors Corporation Method and apparatus for spot weld control
CN110726773A (en) * 2019-11-22 2020-01-24 吉林大学 Couplant-free in-situ pressure holding resistance spot welding ultrasonic detection device and method
CN111693573A (en) * 2020-05-12 2020-09-22 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） Battery tab welding quality evaluation method and device
CN114147382A (en) * 2021-12-14 2022-03-08 吉林大学 Electric and ultrasonic signal composite resistance spot welding quality on-line monitoring method and device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284177A1 (en) * 1987-03-09 1988-09-28 General Motors Corporation Method and apparatus for spot weld control
CN110726773A (en) * 2019-11-22 2020-01-24 吉林大学 Couplant-free in-situ pressure holding resistance spot welding ultrasonic detection device and method
CN111693573A (en) * 2020-05-12 2020-09-22 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） Battery tab welding quality evaluation method and device
CN114147382A (en) * 2021-12-14 2022-03-08 吉林大学 Electric and ultrasonic signal composite resistance spot welding quality on-line monitoring method and device

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