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Development of an electromechanical vacuum switch
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Konstruktion av en elektromekanisk vakuumvakt (Swedish)
Abstract [en]

Pneumatic vacuum systems are today used in automated manufacturing and packaging industries. Before an automated system is allowed to lift an object the control system has to get a good to go signal that informs that the desired vacuum level is reached in the gripper and that it is able to lift the object. The device sending this signal is called a vacuum switch. To reduce the energy consumption of the system the vacuum switch should also send a signal to the energy saving system. The work is conducted for Piab AB in Täby in Sweden. The purpose of this master thesis was to dimension and design a new electromechanical vacuum switch that is able to send a signal from two vacuum levels. The two levels should be adjustable but also dependent of each other to make the switch more reliable. The work resulted in an electromechanical vacuum switch with two dependent and adjustable signals. The switch met 13 of the 15 tested requirements. One of the requirements it failed to meet was the height requirement and the other was a performance parameter which it marginally failed. Further more, all requirements could not be verified. A full verification will have to be done with a later prototype. More work has to be done on the switch before it meets all the requirements and functions as desired, but the purpose can be considered fulfilled since all the basic functions are working as desired.

Abstract [en]

Pneumatiska vakuumsystem används idag inom automatiserade industrier. Innan ett automatiserat system är tillåtet att lyfta ett objekt måste kontrollsystemet få en OK signal som informerar om att den önskade vakuumnivån är uppnåd i gripdonet. Enheten som skickar OK signalen kallas en vakuumvakt. För att hålla nere på systemets energikonsumtion ska vakuumvakten även skicka en signal till energisparsystemet. Arbetet är utfört på Piab AB i Täby i Sverige. Syftet med det här examensarbetet var att dimensionera och konstruera en ny elektromekanisk vakuumvakt som kan skicka en signal från två olika vakuumnivåer. Dessa två vakuumnivåer ska vara justerbara men också beroende av varandra för att göra vakuumvakten mer pålitlig. Arbetet resulterade i en elektromekanisk vakuumvakt med två justerbara och beroende av varandra vakuumnivåer. Vakten uppfyllde 13 av 15 testade krav. En av de krav den inte klarade av att uppfylla var höjdbegränsningen, det andra kravet missade vakten marginellt och det var ett prestandakrav. Alla krav kunde inte verifieras, en fullständig verifikation av de specifierade kraven bör göras med en senare prototyp. Mer arbete behöver läggas ner på vakten innan den uppfyller alla krav och fungerar som önskat, men syftet med arbetet kan fortfarande anses vara uppfyllt eftersom alla grundläggande funktioner fungerar som det är tänkt.

Place, publisher, year, edition, pages
2015. , 52 p.
Series
MMK 2015:46 MKN 160
Keyword [en]
Electromechanical, Vacuum switch, Dependency, Dual channel, Vacuum levels
Keyword [sv]
Elektromekanisk, Vakuumvakt, Beroende, Två-kanalig, Vakuumnivåer
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-183531OAI: oai:DiVA.org:kth-183531DiVA: diva2:912312
External cooperation
Piab AB
Supervisors
Examiners
Available from: 2016-03-16 Created: 2016-03-16 Last updated: 2016-03-16Bibliographically approved

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