Abstract
Robots for resistance welding of car body parts are cleaned from slag and spatters by mobile blast machines and CO2 dry ice pellets. Thereafter normal welding operation of robots.

Description of the substitution
Robots for resistance welding of car body parts (plus the corresponding jigs and transport facilities) are cleaned from slag and spatters. The material is steel and zinkplated steel. The parts is cleaned by a mobile blast machines (Hydroblast Cycle 16-4) for CO2 dry ice pellets operated by pressed air (10 W, 4-16 bar) including a 30 ltr. container, which is filled manually from an insulated thermo container.

The example includes
Safety and health at work: Yes
Environment: Yes

Technical requirements the product must fulfil
A thin film of oil/grease can be tolerated
Free of metallisations
Robots should weld again after cleaning without problems

What problems made you look for a substitution?

What substance or product did you use before?
Earlier the cleaning was done manually with hammer and chisel, this was time consuming and often damaged the surfaces.

What solution did you find?
Dry CO2 ice blasting

Assessment of the solution
Since the agent is produced from waste gases, a closed loop is achieved on global level. CO2 sublimes, so only the dirt remains, which can be disposed of via municipal channels with the household-like company waste
 

What other solutions did you try/assess?
-
 

Further information or literature
Cleantool example D107
http://www.cleantool.org/suche/ergebnis_ts.php?sel_cp=199&idlan=2&sort0=designation&query_show=;;;;;;;&cb_1 =

Breakdown into industries
Iron and metal, electronics and automotive industries

Who entered the example?

Company:	Cooperation Centre Hamburg
Name:	Klaus Kuhl
Address 1:	Besenbinderhof 60
Address 2:
Zip code:	20097
City:	Hamburg
E-mail:	k.kuhl@kooperationsstelle-hh.de
Type:	Organisation

Created by: Klaus Kuhl Wednesday, June 25, 2008
Last edited by: Klaus Kuhl Wednesday, July 23, 2008