&lt;title&gt;Milling machine for the 21st century: goals, approach, characterization, and modeling&lt;/title&gt;

Lauffer, J.P.; Hinnerichs, Terry D.; Kuo, Chunghui; Wada, B. K.; Ewaldz, Dave; Winfough, W. R.; Shankar, Nachiket

doi:10.1117/12.239145

Cited by 16 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where ⌬ n+1 is a vector of small variations of the joint coordinates of the constraining leg. Substituting Equation (13) into Equation (12), one gets…”

Section: Kinetostatic Models With Rigid Linksmentioning

confidence: 99%

“…Therefore, more and more researchers have applied such mechanisms in different kinds of practical uses, such as aircraft simulator 1,6,7 adjustable articulated trusses, 8 mining machines, 9 pointing devices 10 and micro-positioning devices. 11 Recently, it has been developed as high precision machine tools [12][13][14][15] by many companies such as Giddings & Lewis, Ingersoll, Hexel, Geodetic and Toyoda, etc. The Hexapod machine tool [14][15][16][17][18] is one of the successful applications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Parallel kinematic machine design with kinetostatic model

Zhang

Gosselin

2002

Robotica

View full text Add to dashboard Cite

In this paper, a new method – named lumped kinetostatic modeling – to analyze the effect of the link flexibility on the mechanism's stiffness is provided. A new type of mechanism whose degree of freedom (dof) is dependent on a passive constraining leg connecting the base and the platform is introduced and analyzed. With the proposed kinetostatic model, a significant effect of the link flexibility on the mechanism's precision has been demonstrated. The influence of the change in structure parameters, including material properties, on the system behavior is discussed. In the paper, the geometric model of this kind of mechanism is first introduced. Then, a lumped kinetostatic model is proposed in order to account for joint and link compliances; some results and design guidelines are obtained. Finally, the optimization of the precision is addressed using a genetic algorithm.

show abstract

“…where ⌬ n+1 is a vector of small variations of the joint coordinates of the constraining leg. Substituting Equation (13) into Equation (12), one gets…”

Section: Kinetostatic Models With Rigid Linksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parallel kinematic machine design with kinetostatic model

Zhang

Gosselin

2002

Robotica

View full text Add to dashboard Cite

show abstract

“…Hunt [3] suggested the use of the Stewart platform mechanism as a robot manipulator. More recently, some companies such as Giddings and Lewis, Ingersoll, Hexel and Toyota, have utilized parallel mechanisms to develop high precision machine tools [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic analysis of a parallel mechanism with consideration of joint effects

Shiau

Tsai

2008

Mechanism and Machine Theory

View full text Add to dashboard Cite

“…The reduced second order model was then shifted to first order block diagonal form and reduced further via modal cost analysis'*.The final, reduced order model contained 16 states and took the form in the tool, the tool holder, the spindle, and the bearings.…”

mentioning

confidence: 99%

Active chatter control in a milling machine

et al. 1997

Self Cite

View full text Add to dashboard Cite

IThe use of active feedback compensation to mitigate cutting instabilities in an advanced milling machine is discussed in this paper. A linear structural model delineating dynamics significant to the onset of cutting instabilities was combined with a nonlinear cutting model to form a dynamic depiction of an existing milling machine. The model was validated with experimental data. Modifications made to an existing machine model were used to predict alterations in dynamics due to the integration of active feedback compensation. From simulations, subcomponent requirements were evaluated and cutting enhancements were predicted. Active compensation was shown to enable more than double the metal removal rate over conventional milling machines.Keywords: milling, controls, chatter INTRODUCTIONMaximum metal removal rate is a quantitative measure of the productive capacity of a machine tool. This measure, which is machine as well as tool dependent, is limited by the onset of machining in~tabilities',~,~,~. Machining instabilities are minimized by enhancing the stability of structural vibratory modes significant to cutting dynamics.Active methods can be used to enhance the stability of pertinent structural vibratory modes for a variety of machining configurations. Although active methods are relatively immature5, potential performance enhancements resulting from active implementation overshadow performance enhancements resulting from current passive innovations.Active methods can be categorized into activelpassive, process control, and feedback compensation methods. Activelpassive methods actively tune or mimic stabilizing passive absorber^^^^^^. Process control methods alter or modulate operating parameters (spindle speed, feed rate, etc.) to locate, or oscillate between, predetermined stability domains9i10, and feedback compensation methods actively modify machine dynamics such that domains of stability are enlarged".'2713.Presented within this paper is the design of an active feedback compensator which will actively modify machine dynamics such that domains of stability are enlarged. This design process entails; 1) development and validation of a model, 2) modification of the model for active compensation, and 3) performance evaluation.In section 2, modeling and validation is discussed. In section 3, the modeling of dynamics essential for active compensation is discussed. And in section 4, performance earnings are presented. MODEL DEVELOPMENTA machine model is a set of mathematical relationships relating dynamic response parameters (displacement of tool tip center, force on tool, etc ...) to a set of process parameters (spindle speed, number of teeth on tool, etc ...). The goal of modeling is to create mathematical relationships which are sufficiently accurate for the purpose of prediction. Model accuracy is quantified by comparison with experimental data. The model discussed in this section is shown to compare well with experimental data.The machine model is the unification of a cutting model and a structural ...

show abstract

<title>Milling machine for the 21st century: goals, approach, characterization, and modeling</title>

Cited by 16 publications

References 0 publications

Parallel kinematic machine design with kinetostatic model

Parallel kinematic machine design with kinetostatic model

Nonlinear dynamic analysis of a parallel mechanism with consideration of joint effects

Active chatter control in a milling machine

Contact Info

Product

Resources

About