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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Strength point connections in the soft and hard mode welding
 Steiner, Jaromír ; Kubíček, Jaroslav (referee) ; Kandus, Bohumil (advisor)
Spot welding of 1.4307 material of 1+1 mm thickness is tuned out excellently by the enterprise ROSTEX – at the changes only of the welding current it was managed to approach the value of thickness achieved by enterprise ROSTEX. At the welding of 1.4307 material of 2+2 mm thickness it was managed to achieve more strength under welding parameters: Fs = 5500N, Is = 8,964 kA, ts = 10 Per. Spot welding of 1.0330 material revealed a possibility in proceeding with welding current increasing which could stand for the weld strength increasing (not necessarily) – a limit where material could splash was not achieved. The soft mode welding is not convenient for up-to date spot welding because the material is extremely affected by heat at the long welding time, it also leads to huge thermal losses, thermal effect and distortion of electrodes (electrodes life diminishing). Soft mode welding is not expedient even economically. In accordance with economic comparison, see chart 27, page 64 – for instance welding of 1.4307 material with 1+1 mm thickness at 1000 welds there is difference of 644 Czech crowns between the hard and the soft mode welding in benefit to the hard mode.
Detailed record
Strength point connections in the soft and hard mode welding
 Steiner, Jaromír ; Kubíček, Jaroslav (referee) ; Kandus, Bohumil (advisor)
Spot welding of 1.4307 material of 1+1 mm thickness is tuned out excellently by the enterprise ROSTEX – at the changes only of the welding current it was managed to approach the value of thickness achieved by enterprise ROSTEX. At the welding of 1.4307 material of 2+2 mm thickness it was managed to achieve more strength under welding parameters: Fs = 5500N, Is = 8,964 kA, ts = 10 Per. Spot welding of 1.0330 material revealed a possibility in proceeding with welding current increasing which could stand for the weld strength increasing (not necessarily) – a limit where material could splash was not achieved. The soft mode welding is not convenient for up-to date spot welding because the material is extremely affected by heat at the long welding time, it also leads to huge thermal losses, thermal effect and distortion of electrodes (electrodes life diminishing). Soft mode welding is not expedient even economically. In accordance with economic comparison, see chart 27, page 64 – for instance welding of 1.4307 material with 1+1 mm thickness at 1000 welds there is difference of 644 Czech crowns between the hard and the soft mode welding in benefit to the hard mode.
Detailed record

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