An uncertainty analysis of tool setting methods for a precision lathe with a B-axis rotary table

Bono, Matthew; Seugling, R M; Kroll, J. J.; Nederbragt, Walter W.

doi:10.1016/j.precisioneng.2009.06.003

Cited by 13 publications

(5 citation statements)

References 7 publications

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“…The support system of the rotary table is directly related to the machining accuracy of the machine tool. Literature reviews show that some researchers have investigated the effects of the driven mechanisms 1 and the tool-setting techniques 2,3 on the performance of the rotary table as well as calibrating technique. 4 The published contributions on the rotary table techniques are numerous; however, so far there is no study on the support system that greatly affects the static and dynamic performance of the rotary table.…”

Section: Oil Supply Systemmentioning

confidence: 99%

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Multicriteria design of a rotary table with a hybrid constant flow and constant pressure supply system

Feng

Jiang

2013

Proceedings of the Institution of Mechanical Engineers, Part J:

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The rotary table of the heavy machine tools demands higher stiffness to provide substantial load capacity as well as a lower cost. The hydrostatic rotary table supplied with constant flow rate pump is not often used due to its high cost; meanwhile, the system with constant pressure pump suffers from a relatively lower stiffness problem. In this study, an alternative type of rotary table supplied by a constant flow pump and a constant pressure one is proposed to satisfy the requirements. The mathematical model is presented on the basis of hydrostatic theory to predict the axial static performance of the table. A comparison of the performances between constant pressure supply table, constant flow supply table and constant flow and constant pressure supply table has been conducted; the results show that constant flow and constant pressure supply table is the best in static behavior. A multicriteria optimization technique based on the weighted ideal point method is better than the single criteria optimization in achieving the comprehensive property of the table. A variation rate method is used to calculate the weighted factors. The optimization problem is formulated with the maximum stiffness, the minimum power dissipation and the minimum supply pressure.

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Section: Oil Supply Systemmentioning

confidence: 99%

“…In equation (2), the second term is the load capacity of the lower pad. In the reference configuration, the recess pressure of both the upper and the lower pad is…”

Section: Load Capacitymentioning

confidence: 99%

Multicriteria design of a rotary table with a hybrid constant flow and constant pressure supply system

Feng

Jiang

2013

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Four types of automatic tool-setting instruments are available, namely, plug and pull arms, pull down arms, automatic tool-setting arms, and automatic contact. However, the tool-setting probe must be configured separately, the installation process is troublesome, the tool-setting instrument is costly, and the improvement degree of tool-setting efficiency is limited [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Computer Vision Tool-Setting System of Numerical Control Machine Tool

Hou

Zhang

Yang

2020

Sensors

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An automatic tool-setting and workpiece online detecting system was proposed to study the key technologies of next-generation intelligent vision computerized numerical control (CNC) machines. A computer vision automatic tool-setting system for a CNC machine was set up on the basis of the vision tool-setting principle. A rapid vision calibration method based on the position feedback from the CNC machine was proposed on the basis of the theory of traditional vision system calibration. The coordinate mapping relationship of the image and the CNC machine, the tool-setting mark point on the workpiece, and the tool tip were calibrated. The vision system performance testing and system calibration experiments were performed. Experimental results indicated that the time consumption was 128 ms in image processing. The precision of tool setting and measuring was less than 1 μm. The workpiece positioning and processing online detection function of the system can completely meet the requirements of visual CNC machine application, and the system has wide application prospects.

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“…Thus this control scheme has higher demands on machining precision if it wants to be applied on high precision occasion. In the actual application, the scheme is generally applied in the fields of having low demands on indexing accuracy and control accuracy [10,11,12]. High precision location was implemented by using the compensation function for worktable of CNC mentioned in Reference [13], but the worktable can not be used alone away from the CNC.…”

Section: Introductionmentioning

confidence: 99%

Research and Implementation of Control Method for Time Grating Rotary Table with High Precision

Gao

2013

AMR

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A new numerical control (NC) rotary table with high accuracy is presented. Time grating, which was taken as the angle measuring unit, was installed inside the rotary table to measure the angular displacement in real time. Moreover, the signal of time grating was used as the feedback to realize full-closed loop control for improving the control accuracy of the NC table. Furthermore, the problem of insufficient subdivision of the step angle of the stepping motor could be solved by increasing the transmission ratio of motor shaft and rotary table. Experiments prove that the NC rotary table has the advantages of high control accuracy and running steadily, and the NC system shows a good application prospect in the field of machining.

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An uncertainty analysis of tool setting methods for a precision lathe with a B-axis rotary table

Cited by 13 publications

References 7 publications

Multicriteria design of a rotary table with a hybrid constant flow and constant pressure supply system

Multicriteria design of a rotary table with a hybrid constant flow and constant pressure supply system

Computer Vision Tool-Setting System of Numerical Control Machine Tool

Research and Implementation of Control Method for Time Grating Rotary Table with High Precision

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