Compensation of reference surface errors in the machining of free form features

Fallah, Meghdad; Arezoo, Behrooz

doi:10.1177/0954405411431402

Cited by 7 publications

(6 citation statements)

References 27 publications

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“…For simplifying the calculations, the transformation matrix from ACS to TCS is calculated and then the result is reversed. The transformation from ACS to TCS is carried out in four steps as follows: 26 Step 1. Linear transformation of TCS origin to ACS origin.…”

Section: Mathematical Modelling Of Wdesmentioning

confidence: 99%

“…Step 3. Posing ACS-ZX plane on TCS-XY as follows: 26 a. Rotating about the TCS Z-axis using equation ( 4)…”

Section: Mathematical Modelling Of Wdesmentioning

confidence: 99%

“…In their previous work, the authors presented a systematic method for compensating the WDE in three-axis machining. 26 In this article, this method is developed further for compensating WDE in five-axis machining. The compensation methodology is different in three-axis and five-axis machining.…”

Section: Introduction and Related Research Workmentioning

confidence: 99%

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Modelling and compensation of datum errors in five-axis machining

Fallah

Arezoo

2012

Proceedings of the Institution of Mechanical Engineers, Part B:

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Positioning of workpieces in machining operations has a direct influence on the machined features. Workpiece datum errors are one of the error sources that affect the workpiece positioning in the fixture. In this article, a systematic method is presented for eliminating the effect of datum errors on the workpiece machined features in five-axis machining. In this method, the effect of datum errors on the machined features is mathematically modelled using homogenous transformation matrix, and the error vector on the workpiece machining surface is obtained. The error vector consists of position and orientation errors of the tool in workpiece coordinate system. In this work, a compensation module is developed, which is applied to the machining codes of the workpiece. The input to this module is the datum errors and initial NC-codes. The output of the module is the modified NC-codes. For verifying the method, two cases are studied, which are related to five-axis drilling and five-axis free-form milling. Using the compensation method, the position, orientation and form errors are decreased considerably. The results confirm that this method can be used for compensating the datum errors effectively.

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Section: Mathematical Modelling Of Wdesmentioning

confidence: 99%

“…Step 3. Posing ACS-ZX plane on TCS-XY as follows: 26 a. Rotating about the TCS Z-axis using equation ( 4)…”

Section: Mathematical Modelling Of Wdesmentioning

confidence: 99%

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Modelling and compensation of datum errors in five-axis machining

Fallah

Arezoo

2012

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Because of this advantage, OMEC has made significant results in terms of rapid compensation and high accuracy, and its application has received a great deal of attention. [3][4][5][6][7] Jung et al 8 used a touch-trigger probe system for on-machine measurement (OMM) in a three-axis vertical machining center. The original tool path was edited based on OMM result for the subsequent compensation machining process.…”

Section: Introductionmentioning

confidence: 99%

An on-machine error compensation method for an ultra-precision turning machine

Zou

Zhao

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part B:

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On-machine error compensation (OMEC) is efficient at improving machining accuracy without increasing extra manufacturing cost, and involves the on-machine measurement (OMM) of machining accuracy and modification of program code based on the measurement results. As an excellent OMM technique, chromatic confocal sensing allows for the rapid development of accurate and reliable error compensation technique. The present study integrated a non-contact chromatic confocal probe into an ultra-precision machine for OMM and OMEC of machined components. First, the configuration and effectiveness of the OMM system were briefly described, and the relevant OMEC method was presented. With the OMM result, error compensation software was then developed to automatically generate a modified program code for error compensation. Finally, a series of cutting experiments were performed to verify the validity of the proposed OMEC method. The experimental results demonstrate that the proposed error compensation method is reliable and considerably improves the form error of machined components.

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“…The simulation system accurately predicted the surface topography and simulated the surface microfeatures, which are formed by the five-axis milling process. Fallah and Arezoo 7 focused on the compensation of reference surface errors in the machining of freeform features, a new method for manufacturing error-free workpieces was proposed, and the production time and cost were saved. Can and Ünüvar 8 presented a new approach to determine the efficient iso-scallop tool paths of a freeform B-spline parametric surface.…”

Section: Introductionmentioning

confidence: 99%

A novel tool-path generation method for five-axis flank machining of centrifugal impeller with arbitrary surface blades

Fan

Wang

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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The centrifugal impeller with arbitrary surface blades is a very important component in automobile, ships, and aircraft industry, and it is one of the most difficult parts to process. Focusing on the machining efficiency improvement, combining the geometric advantages of ruled surface and arbitrary surface, and utilizing the efficient and accurate advantages of flank machining and point machining, this article presents a novel and targeted tool-path generation method and algorithm for five-axis flank machining of centrifugal impeller with arbitrary surface blades. In light of specific characters of different surfaces, the analyses of two different impeller blades are proposed first, the more characteristic and complex geometrical structures of the arbitrary blade are achieved. In rough machining, an approximate ruled surface blade is obtained, and a simple channel is achieved; the flank milling of the centrifugal impeller with ruled surface blades is achieved relative to the point milling of the centrifugal impeller with arbitrary surface blades; and the triangle tool path planning method is added in this process to save the machining time and cost collectively. Furthermore, in semi-finish machining, the approximate sub-ruled blade surfaces are calculated, and a new flank milling method of the sub-ruled blade surfaces is achieved; a new solution for tool interference is achieved in this process and the generation of non-interference tool paths becomes easy. Machining experiments of two different impellers are presented as a test of the proposed methods.

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Compensation of reference surface errors in the machining of free form features

Cited by 7 publications

References 27 publications

Modelling and compensation of datum errors in five-axis machining

Modelling and compensation of datum errors in five-axis machining

An on-machine error compensation method for an ultra-precision turning machine

A novel tool-path generation method for five-axis flank machining of centrifugal impeller with arbitrary surface blades

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