Avtomaticheskaya Svarka (Automatic Welding), #11, 2021, pp. 40-43
Requirements to technical characteristics of resistance
.O. Paton Electric Welding Institute of the NAS of Ukraine.
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: firstname.lastname@example.org
Welding of up to 0.5 mm thick parts is usually called microwelding. Resistance microwelding is widely applied in electronics
and instrument-making. Thermal inertia of welded parts at resistance welding is proportional to the square of their thickness.
As a result of low thermal inertia of parts at microwelding, the change of their temperature is close to the change in time of
welding current of 50 Hz industrial frequency. In order to eliminate the ripple, resistance microwelding should be conducted by
direct current pulses or high-frequency welding current. At microwelding the initial part-part contact resistance is tens of times
higher than that of the parts being welded. To reduce the initial splashes of molten metal and stabilize the welded joint quality,
the welding current should increase smoothly at microwelding. 12 Ref., 2 Tabl.
resistance microwelding, similarity theory, thermal inertia, welding current frequency, typical welding modes
1. Bannov, M.D. (2005) Resistance welding technology and
equipment. Moscow, Akademiya [in Russian].
2. Ataush, V.E., Leonov, V.P., Moskvin, E.G. (1996) Microwelding
in instrument engineering. Riga, RTU [in Russian].
3. Moravsky, V.E., Vorona, D.S. (1985) Technology and equipment
for spot and projection capacitor-discharge welding.
Kiev, Naukova Dumka [in Russian].
4. Kolupaev, Yu.F., Privezentsev, V.I. (2003) Peculiarities of capacitor-
discharge welding of nichrome in producing of jevellery.
Svarochn. Proizvodstvo, 11, 41–43 [in Russian].
5. Paerand, Yu.E., Bondarenko, A.F. (2005) Peculiarities of formation
of current pulses for small-size parts. Tekhnichna Elektrodynamika.
Tem. Issue: Power Electronics and Power Efficiency,
Pt 3, 28-31 [in Russian].
6. Paerand, Yu.E., Bondarenko, A.F. (2006) Application of special
shape pulses for resistance microwelding. In: Proc. of 7th Int.
Sci.-Pract. Conf. on Modern Information and Electronic Technologies
(MIET-2006), Vol.2. Odessa, SE Neptun, Tekhnologiya.
7. Paerand, Yu.E., Bondarenko, A.F. (2006) Power supply for
resistance microwelding with programmable shape of welding
pulse. Tekhnologiya i Konstruirovanie v Elektronnoj Apparature,
4, 51–54 [in Russian].
8. Lankin, Yu.N. (1967) Electromodeling of thermal processes in resistance
spot welding. Avtomatich. Svarka, 7, 23–26 [in Russian].
9. Lebedev, V.K., Yavorskij, Yu.D. (1960) Application of similarity
criteria for determination of resistance welding modes.
Ibid., 8, 37–44 [in Russian].
10. Paton, B.E., Lebedev, V.K. (1969) Electric equipment for resistance
welding. Theory elements. Moscow, Mashinostroenie
11. Paton, B.E., Gavrish, V.S., Grodetsky, Yu.S. (1963) Inertialess
diagrams of automatic regulation of resistance welding
processes. Avtomatich. Svarka, 5, 7–10 [in Russian].
12. Leonov, V.P., Barabanshchikova, L.A., Grechenkova, A.A., Ataush,
V.E. (1990) Controllable power supply SARM-1 for resistance microwelding.
Svarochn. Proizvodstvo, 10, 36–38 [in Russian].
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