Cleaning device for mechanically cleaning gas nozzle of gas-shielded welding torch

Abstract

The invention relates to a cleaning device for mechanically cleaning a gas nozzle of a gas-shielded welding torch, comprising a cleaning head (1), which is rotationally driven in a controlled manner and has at least one cleaning element that rotates therewith, and comprising a feeding and centering apparatus for positioning the gas nozzle (2) coaxially with respect to the axis of rotation (21) of the cleaning head (1) in the region of the at least one cleaning element. According to the invention, the cleaning element consists of a pair of cleaning scissors (18) having two cleaning arms (19, 20), which are suspended in the cleaning head (1) on a pivot bearing (22) arranged transversely to the axis of rotation (21) in the form of a pair of scissors, in such a way that the cleaning arms can swing freely. A centrifugal-force weight (23, 24) is arranged on each of the cleaning arms (19, 20) at the lower end region facing away from the gas nozzle such that the pair of cleaning scissors (18) is spread open when the cleaning head rotates. Each of the cleaning arms (19, 20) has a scraper structure (27, 28) at the upper end region facing the gas nozzle, which scraper structures are inserted into the gas nozzle (2) in the folded-together state of the pair of cleaning scissors without rotation of the cleaning head and are pressed against the gas-nozzle inner surface (13) of the gas nozzle (2) in a sliding and scraping manner when the pair of cleaning scissors (18) is spread open by a subsequent rotation of the cleaning head, the gas nozzle being held non-rotatably.

Description

technical field [0001] The invention relates to a cleaning device for mechanically cleaning the gas nozzles of a shielding gas welding torch, in particular a CMT+ welding torch, according to the preamble of claim 1 . Background technique [0002] A shielding gas-welding torch (EP 0090233B1) for known devices for cleaning welding torches comprises a contact tube which guides the welding wire during welding and a tubular, which guides an inert shielding gas which surrounds the contact tube at a distance from it. Gas nozzle. The gas nozzle has a conically tapering gas nozzle tip. Furthermore, the contact tube is also conically tapered at the end as a truncated cone. [0003] The known cleaning device has a controlled rotationally driven cleaning head with at least one co-rotating cleaning element, and a transport and centering device for relative The axis of rotation of the cleaning head positions the gas nozzle coaxially. [0004] In particular, the gas nozzle to be cleane...

AI Technical Summary

Problems solved by technology

[0006] Due to the extremely conical design of the gas nozzle, the inner surface of the gas nozzle forming the undercut can only be touched with difficulty and therefore can only be cleaned mechanically with difficulty.

Therefore costly ultrasonic cleaning is now used

Ultrasonic cleaning is particularly complex and cost-intensive at high investment costs in robot-assisted welding / soldering methods and method-integrated automatic cleaning

Images