Development of Fixture Devices for Thin and Compliant Workpieces

Aoyama, Tojiro; Kakinuma, Yasuhiro

doi:10.1016/s0007-8506(07)60114-0

Cited by 72 publications

(20 citation statements)

References 5 publications

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“…Another solution is the use of fixturing: vacuum fixtures, adaptive fixtures using low melting temperature alloys, or automated fixtures [6]. However, frequently these solutions are neither cheap nor flexible.…”

Section: Introductionmentioning

confidence: 99%

Chatter avoidance in the milling of thin floors with bull-nose end mills: Model and stability diagrams

Campa

Lacalle

Celaya

2011

International Journal of Machine Tools and Manufacture

120

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The milling of thin parts is a high added value operation where the machinist has to face the chatter problem. The study of the stability of these operations is a complex task due to the changing modal parameters as the part losses mass during the machining and the complex shape of the tools that are used. The present work proposes a methodology for chatter avoidance in the milling of flexible thin floors with a bull-nose end mill. First, a stability model for the milling of compliant systems in the tool axis direction with bullnose end mills is presented. The contribution is the averaging method used to be able to use a linear model to predict the stability of the operation. Then, the procedure for the calculation of stability diagrams for the milling of thin floors is presented. The method is based on the estimation of the modal parameters of the part and the corresponding stability lobes during the machining. As in thin floor milling the depth of cut is already defined by the floor thickness previous to milling, it is proposed the use of stability diagrams that relate the tool position along the tool-path with the spindle speed. Hence, the sequence of spindle speeds that the tool must have during the milling can be selected. Finally, this methodology has been validated by means of experimental tests.

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Section: Introductionmentioning

confidence: 99%

Chatter avoidance in the milling of thin floors with bull-nose end mills: Model and stability diagrams

Campa

Lacalle

Celaya

2011

International Journal of Machine Tools and Manufacture

120

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“…When all pins are in contact with the surface, they are clamped and a rigid support has been created. One example for this application is the adaptive clamping of thin and compliant workpieces where the pins are supported by a low melting temperature alloy [95]. When the workpiece is positioned in the clamping device, the alloy which supports the pins is liquefied by a heater plate (Figure 26).…”

Section: Workpiece Handlingmentioning

confidence: 99%

Workpiece and Tool Handling in Metal Cutting Machines

Fleischer

Denkena

Winfough³

et al. 2006

CIRP Annals

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“…Melike Aver Firat University /Department of Mechanical Engineering Elazig/Turkey Oguzhan Yilmaz Gazi University / Department of Mechanical Engineering Ankara/Turkey Particularly, conformable pin-array fixture technology [4] is widely used in many fixture designs because some components contain internal variables that can be adjusted to meet the different features of workpieces. Pin-array fixtures are able to quickly accommodate for different shape and dimensions without extensive changes.…”

Section: Introductionmentioning

confidence: 99%

Designing of an Adaptive Fixture For Thin Walled Parts

Aver¹,

Yilmaz²

2016

Fourth International Conference on Advances in Mechanical and Automation Engineering - MAE 2016

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Abstract-Fixtures are the main elements in manufacturing processes, such as machining, grinding, welding, assembling etc. Pin fixtures are type of fixtures and they are gaining popularity since they can adopt part surface. This study aims to design and investigate the pin fixtures for thin-walled parts to be machined. In machining of thin-walled parts, main machining considerations are deflections which directly affect the dimensional tolerances and part qualities, and stresses considered as a main cause of deflection. Deflection results were obtained for three pin diameters, three pin configurations and three different forces at two points using ANSYS FEA software. The Von-Mises stresses were also analyzed for the same principle as used in the deflection analyses. Through determining the best pin fixture configuration and pin diameter, it is aimed to design an adaptive pin fixture for thinwall machining and blade tip repair without excessive deflections. The results have shown that the array configuration can be used as the best adaptable fixture type for part-to-part geometry. Minimum deflections both for edge and midspan loading are obtained for array configuration using 2mm pin diameters.

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Development of Fixture Devices for Thin and Compliant Workpieces

Cited by 72 publications

References 5 publications

Chatter avoidance in the milling of thin floors with bull-nose end mills: Model and stability diagrams

Chatter avoidance in the milling of thin floors with bull-nose end mills: Model and stability diagrams

Workpiece and Tool Handling in Metal Cutting Machines

Designing of an Adaptive Fixture For Thin Walled Parts

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