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Process for Chemical Etching and Milling

IP.com Disclosure Number: IPCOM000095550D
Original Publication Date: 1964-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Norture, R: AUTHOR

Abstract

In this process for chemical etching and milling, corrosive liquid is impelled onto the surface to be engraved or milled. The impelled liquid is in the form of a directed jet to which an ultrasonic agitation has been communicated to increase the efficiency of the attack.

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Process for Chemical Etching and Milling

In this process for chemical etching and milling, corrosive liquid is impelled onto the surface to be engraved or milled. The impelled liquid is in the form of a directed jet to which an ultrasonic agitation has been communicated to increase the efficiency of the attack.

Tank 1 contains an acid solution whose temperature is maintained constant by heating element 2 and cooling element 3. Suction pump 4 draws the liquid into pipe 5 toward nozzle 6. Nozzle 6 forms an elongated narrow jet directed upwards toward work 7 to be engraved. Ultrasonic sound source 8 is located in pipe 5 below nozzle 6. Work 7 is suspended from carriage 9 driven by chain drive 10. The rate of movement of carriage 9 is dependent on the type of metal and acid and the depth of attack desired.

The ultrasonic agitation of the acid increases the rapidity of the attack on the metal. Undercutting is reduced since the rapidity of attack allows the use of a jet which strikes the work perpendicularly and falls back immediately.

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