Status of Tube assembly in Univ. of Athens V. Birioukov (Protvino) - PDF document

Status of Tube assembly in Univ. of Athens V. Birioukov (Protvino) D.Fassouliotis P. Ioannou C. Kourkoumelis A. Koulemzine (Prrotvino) V. Pancheluga T. Pappas V. Gapienko (Visitor Protvino) D. Fassouliotis 08-2-2000 PC meeting

Changes - Improvements Problems - Difficulties Miscellaneous Summary

Changes - Improvements 1- Pneumatic Pin Crimpers installed (Operation at 8 Bar) 2- Bar Code Reader installed 3- New Crimping Tool installed coper pin on brass pin. Two altenatives : * special chock (tested over 100 end-plugs with no failure) * New Specialy designed instrument (see photo) under tests 4- Reinforcment of wiring Table next week (to not allow misalignments ) 5- Adjustable basis for clamps-crimpers next week (to facilitate cure of possible misalignments) 6- Wire Tension Measurement next 2 weeks on the wiring table 7- Electronic Transducers soon to replace micrometers for quality checks (automatic readout --> complete automatic input of data to database)

New tool for crimping coper pin on brass pin

Problems - Difficulties in the start of next BIS module 1- Spring groove too shallow by 0.3 mm Solution: deeeper machining of end-plugs 2- Brass Pin different hole diameter Solution: Change of tooling used for crimping 3- Step Motor Drive Failure for Wire Tensioning Solution: Tensioning with weights in fallback Station 5 (Quality of tensioning : see next figure)

Miscellaneous 46 boxes of tubes arrived - recived and stored with safety (Reliable procedure) Electronic setup for operating single tubes verified and operated (example : gas gain measurements see next figure)

Summary * 50 tubes reeady for QA/QC control New Important issues: end-plug machining spring characteristics * Wiring operating at 6 min per tube including quality tests not including endplug preparation * Wiring precedure very transparent (6 min achieved after 1 hour train of second operator) * Reliable fall back solutions exist for most of the wring operations