Dynamic weld power termination for hot-staking armature commutators
US6545243B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2001 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Sep 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R43/0214
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The method of the present invention involves setting a penetration threshold as well as a maximum weld time when hot staking armature conductors to the slots of a commutator. To perform each weld, an electrode is forcibly contacted with the top conductor in one of the slots of the commutator. Next, electric current is delivered to the electrode, causing the conductor to heat and begin to deform within the slot. During this time, the electrode moves further into the slot. If the electrode reaches the penetration threshold in the commutator slot before the maximum weld time is reached, current to the electrode is terminated. After terminating current to the electrode, the electrode remains in contact with and applies force to the conductor until the maximum weld time is reached. After the maximum weld time is reached, the electrode is removed from contact with welded conductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.