公开(公告)号：SE390798B

公开(公告)日：1977-01-24

申请号：SE201172

申请日：1972-02-18

Applicant: HILTI AG

Inventor： TAUERN D ,  HARDER K M

IPC: B23K9/10 ,  B23K11/26 ,  B23K9/20

Abstract: In the apparatus disclosed, a direct current source charges several banks of capacitors. A discharge circuit connects the capacitor banks to the same welding terminals. Charge-circuit decoupling devices, each connected to a separate bank in the charging paths from the source to the bank, decouple the banks from each other. Discharge-circuit decoupling devices, each connected to a bank in the discharge paths of the circuit between the banks and the welding terminals, decouple the banks. The charge-circuit decoupling devices may be composed of separate resistors, diodes, or the like. The discharge-circuit coupling devices are composed of resistors, diodes, thyristors, current switches, or the like.

公开(公告)号：SE384161B

公开(公告)日：1976-04-26

申请号：SE7310659

申请日：1973-08-02

Applicant: HILTI AG

Inventor： BACHMANN G ,  HARDER K M

IPC: B23K9/073 ,  B23K11/26 ,  B23K9/20

公开(公告)号：DK140277B

公开(公告)日：1979-07-23

申请号：DK179772

申请日：1972-04-13

Applicant: HILTI AG

Inventor： HARDER K M

IPC: B23K9/10 ,  B23K9/20 ,  B23K11/26

Abstract: In the stud welding apparatus disclosed a battery or bank of capacitors in the main welding line stores welding energy. A current supply unit charges the bank of capacitors. An electronic switch applies the energy from the bank of capacitors to welding electrodes. A control device, which can be turned on and off, renders the electronic switch conductive when it is turned on. A safety circuit reduces the output voltage of the current supply unit when the electronic switch happens to turn on while the control device is turned off. The safety circuit also reduces the voltage across the bank of capacitors.

公开(公告)号：NO134450B

公开(公告)日：1976-07-05

申请号：NO124572

申请日：1972-04-12

Applicant: HILTI AG

Inventor： HARDER K M

IPC: B23K9/10 ,  B23K9/20 ,  B23K11/26

Abstract: In the stud welding apparatus disclosed a battery or bank of capacitors in the main welding line stores welding energy. A current supply unit charges the bank of capacitors. An electronic switch applies the energy from the bank of capacitors to welding electrodes. A control device, which can be turned on and off, renders the electronic switch conductive when it is turned on. A safety circuit reduces the output voltage of the current supply unit when the electronic switch happens to turn on while the control device is turned off. The safety circuit also reduces the voltage across the bank of capacitors.