A Method of Testing Position Independent Geometric Errors in Rotary Axes of a Five-axis Machine Tool Using a Double Ball Bar

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@article{0a368628d0c543e0b0782f2a08ebc450,
title = "A Method of Testing Position Independent Geometric Errors in Rotary Axes of a Five-axis Machine Tool Using a Double Ball Bar",
abstract = "Ensuring that a five-axis machine tool is operating within tolerance iscritical. However, there are few simple and fast methods to identify whetherthe machine is in a \usable{"} condition. This paper investigates the use ofthe double ball bar (DBB) to identify and characterise the position indepen-dent geometric errors (PIGEs) in rotary axes of a five-axis machine tool byestablishing new testing paths. The proposed method consists of four testsfor two rotary axes; the A-axis tests with and without an extension bar andthe C-axis tests with and without an extension bar. For the tests without anextension bar, position errors embedded in the A- and C-axes are measuredfirst. Then these position errors can be used in the tests with an extensionbar, to obtain the orientation errors in the A- and C-axes based on the givengeometric model. All tests are performed with only one axis moving, thussimplifying the error analysis. The proposed method is implemented on aHermle C600U five-axis machine tool to validate the approach. The resultsof the DBB tests show that the new method is a good approach to obtainingthe geometric errors in rotary axes, thus can be applied to practical use inassembling processes, maintenance and regular checking of multi-axis CNCmachine tools.",
author = "Robert Cripps",
year = "2015",
month = feb,
doi = "10.1016/j.ijmachtools.2014.10.010",
language = "English",
volume = "89",
pages = "151–158",
journal = "International Journal of Machine Tools and Manufacture",
issn = "0890-6955",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - A Method of Testing Position Independent Geometric Errors in Rotary Axes of a Five-axis Machine Tool Using a Double Ball Bar

AU - Cripps, Robert

PY - 2015/2

Y1 - 2015/2

N2 - Ensuring that a five-axis machine tool is operating within tolerance iscritical. However, there are few simple and fast methods to identify whetherthe machine is in a \usable" condition. This paper investigates the use ofthe double ball bar (DBB) to identify and characterise the position indepen-dent geometric errors (PIGEs) in rotary axes of a five-axis machine tool byestablishing new testing paths. The proposed method consists of four testsfor two rotary axes; the A-axis tests with and without an extension bar andthe C-axis tests with and without an extension bar. For the tests without anextension bar, position errors embedded in the A- and C-axes are measuredfirst. Then these position errors can be used in the tests with an extensionbar, to obtain the orientation errors in the A- and C-axes based on the givengeometric model. All tests are performed with only one axis moving, thussimplifying the error analysis. The proposed method is implemented on aHermle C600U five-axis machine tool to validate the approach. The resultsof the DBB tests show that the new method is a good approach to obtainingthe geometric errors in rotary axes, thus can be applied to practical use inassembling processes, maintenance and regular checking of multi-axis CNCmachine tools.

AB - Ensuring that a five-axis machine tool is operating within tolerance iscritical. However, there are few simple and fast methods to identify whetherthe machine is in a \usable" condition. This paper investigates the use ofthe double ball bar (DBB) to identify and characterise the position indepen-dent geometric errors (PIGEs) in rotary axes of a five-axis machine tool byestablishing new testing paths. The proposed method consists of four testsfor two rotary axes; the A-axis tests with and without an extension bar andthe C-axis tests with and without an extension bar. For the tests without anextension bar, position errors embedded in the A- and C-axes are measuredfirst. Then these position errors can be used in the tests with an extensionbar, to obtain the orientation errors in the A- and C-axes based on the givengeometric model. All tests are performed with only one axis moving, thussimplifying the error analysis. The proposed method is implemented on aHermle C600U five-axis machine tool to validate the approach. The resultsof the DBB tests show that the new method is a good approach to obtainingthe geometric errors in rotary axes, thus can be applied to practical use inassembling processes, maintenance and regular checking of multi-axis CNCmachine tools.

U2 - 10.1016/j.ijmachtools.2014.10.010

DO - 10.1016/j.ijmachtools.2014.10.010

M3 - Article

VL - 89

SP - 151

EP - 158

JO - International Journal of Machine Tools and Manufacture

JF - International Journal of Machine Tools and Manufacture

SN - 0890-6955

M1 - 89

ER -