AN APPLICATION OF REAL-TIME ERROR COMPENSATION ON A TURNING CENTER

被引：58

作者：

LO, CH

YUAN, JX

NI, J

机构：

[1] S. M. Wu Manufacturing Research Center, College of Engineering, The University of Michigan, Ann Arbor

来源：

INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE | 1995年 / 35卷 / 12期

关键词：

D O I：

10.1016/0890-6955(95)97296-C

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A real-time error compensation (RTEC) system is developed to correct thermally-induced and geometric errors on a four-axis dual-spindle turning center. These errors vary with different cutting tool positions as well as different thermal conditions, thus real-time correction is required. Two problems in the current RTEC approach are addressed: (1) the difficulty in the actual measurement of error components according to the defined coordinates and (2) the selection of a small set of appropriate temperature variables from numerous candidate thermal sensors on a machine structure. A flexible error measurement method and an optimal temperature variable selection process are proposed to overcome these difficulties. After machine errors were characterized and modeled, the effectiveness of the developed RTEC system was evaluated by using laser inspection and an actual cutting test. The maximal diagonal displacement error is corrected from 75.0 to 7.5 mu m. In the cutting test, the parr diameter error of a car steering joint is reduced from 60 to 10 mu m.

引用

页码：1669 / 1682

页数：14

共 13 条

[1]

Donmez, Blomquist, Hocken, Liu, Barash, A general methodology for machine tool accuracy enhancement by error compensation, Prec. Engng, 8, 4, pp. 187-196, (1986)

[2]

Chen, Yuan, Ni, Wu, Real-time compensation for time-variant volumetric error on a machining center, Journal of Engineering for Industry, 114, pp. 472-479, (1993)

[3]

Tlusty, Mutch, Testing and evaluation thermal deformations of machine tools, Proc. MTDR Conf., 14, pp. 285-297, (1973)

[4]

Schultschik, The components of volumetric accuracy, Ann. CIRP, 25, pp. 223-227, (1977)

[5]

Moriwaki, Thermal deformation and its on-line compensation of hydrostatically supported precision spindle, CIRP Annals - Manufacturing Technology, 37, pp. 283-286, (1988)

[6]

Donmez, Progress report of the quality in automation project for FY90, Technical Report NISTIR-4536, pp. 14-16, (1991)

[7]

Chen, Yuan, Ni, Wu, Thermal error modeling for volumetric error compensation, Proc. ASME Winter Annual Meeting PED-55, pp. 113-125, (1992)

[8]

McClelland, Rumelhart, Parallel Distributed Processing, (1986)

[9]

Lo, Yuan, Ni, Error link metrology and flexible error synthesis model for correcting quasi-static machine errors, Trans. NAMRI/SME, 22, pp. 267-273, (1994)

[10]

Geweke, Meese, Estimating regression models of finite but unknown order, International Economic Review, 22, pp. 55-69, (1981)

← 1 2 →