Hydraulic and Servoelectric Clamping Units

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F16%3A00335644" target="_blank" >RIV/68407700:21220/16:00335644 - isvavai.cz</a>

Result on the web

<a href="http://ichp.vsb.cz/2016/cz.html" target="_blank" >http://ichp.vsb.cz/2016/cz.html</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Hydraulic and Servoelectric Clamping Units

Original language description

Manufacturing of airplane structural parts requires attaining a constant material thickness with an accuracy of 0.1 mm. Nowadays the wing profiles are clamped on prepared beds, which are machined negatively to achieve a perfect fit with the workpiece. To provide a universal clamping system which would be independent of a final product it was necessary to come up with some intelligent fixture solution. Due to specific safety requirements of aircraft industry it is necessary to manufacture the whole part from a block of material. It is obvious that the behaviour of the workpiece must vary with the ongoing machining process. In both cases it was necessary to come up not only with a hardware solution, but also with a software solution and a control algorithm. Based on the experience with machining processes, servomotor units have been designed. They consist of a servomotor, a gearbox, a ball screw for precise positioning and guiding rods with clamping brakes. This includes the development of modular active clamping systems for leveling the workpiece in the support points, the use of self-adjusting clamping units with internal force and position sensors, and a closed-loop control unit commanding the fixture elements based on the sensor’s information and the control algorithm. In this case the high-pressure hydraulics is used for clamping. Two more types of units have also been proposed: one provides a pre-deformation of workpiece before machining, and the other enables pressure scanning and adjustment to prevent material damage during the machining process or the manipulation phase. Prototypes of these units were made and their functionality has been verified during the machining process. Control algorithm and sequence control of electro-hydraulic clamping devices have also been tested. The most important outcome is enabling a smart synergistic cooperation of servomotor units and hydraulic clamping systems with commands and needs of the machine.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20302 - Applied mechanics

Project

<a href="/en/project/7E13050" target="_blank" >7E13050: INTElligent FIXture for the manufacturing of low rigidity components</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings Of The 23rd International Conference on Hydraulics and Pneumatics

ISBN

978-80-248-3915-8

ISSN

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e-ISSN

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Number of pages

8

Pages from-to

25-32

Publisher name

VŠB - Technical University of Ostrava

Place of publication

Ostrava

Event location

Praha

Event date

Jun 1, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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