Manufacturing Systems Inc.

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CRT Gun manufacturing process development


The typical fabrication of CRT Electron Guns was to hold all of the metal elements in place while "slamming" four glass rods, which were close to their molten state, over the support legs of the parts, (shown at left).  The process required an extremely expensive fixture.  Ultimately the Electron Gun was placed inside a glass tube, (not shown).




















  
It was proposed that the four glass rods be eliminated while using the outer tube for support.  There are a number of manufacturing and engineering advantages with this new concept. 
The parts were located and fastened in place by preheating the outer glass tube before four hydrogen-oxygen flames would soften the glass in 4 specific
locations where probes would press the glass in and around the support legs.



The experimental equipment was developed to produce the prototype, (shown above).

The gun parts were held by a series of fixtures which could be located via numerical control.  The ability to position parts numerically provided two valuable advantages.  First, because of numerical control, new product engineering would be able to easily fabricate new electron gun designs by changing the sequence of various types of parts and the spacing between the parts.  This process would allow for series of prototype guns to be easily fabricated with varying spacing's etc. for tested.  The second great advantage was the ability to translate the fundamental gun designs into 100% automated equipment that could mass produce the numerical control "recipes" with very high repeatability and tolerances.  Also, because of the programmable nature of this concept, the production equipment would be able to intermix part assemblies as needed per manufacturing schedules.





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