NC post-processor for 5-axis milling machine of table-rotating/tilting type

Jung, Yoon-Gyo; Lee, D.W.; Kim, J.S.; Mok, Hak-Soo

doi:10.1016/s0924-0136(02)00725-2

Cited by 92 publications

(41 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the role of this postprocessor is to compute the articular configurations (Xm,Ym,Zm,A,C) for each Cl point (Xpr,Ypr,Zpr,i,j,k) programmed in the part frame ( Figure 3). Given the machine-tool architecture (Figure 13), the IKT leads to equations (1) and (2). Details on the geometrical modelling of the machine-tool and the IKT formulation are exposed in appendix.…”

Section: Trajectory Into the Articular Spacementioning

confidence: 99%

“…Indeed, switching from domain 1 (A 1 >0) to domain 2 (A 2 <0) makes the table C rotates about 180°. This rapid movement can cause rear gouging, especially when using toroïdal tool [2] [3]. Moreover, during this movement, the displacement of the cutter contact on the surface is small; the relative velocity tool-surface is almost zero.…”

Section: Trajectory Into the Articular Spacementioning

confidence: 99%

See 1 more Smart Citation

Kinematic Performances in 5-Axis Machining

Lavernhe

Tournier

Lartigue

2007

Advances in Integrated Design and Manufacturing in Mechanical Engineering II

View full text Add to dashboard Cite

This article presents a predictive model of the kinematical behaviour during 5-axis machining. This model highlights differences between the programmed tool-path and the actual follow-up of the trajectory. Within the High Speed Machining context, kinematical limits of the couple CNC-machine-tool have to be taken into account in the model. The originality of the model is the use of the inverse-time method to coordinate machine-tool axes, whatever their nature (translation or rotation). The model reconstructs the actual relative velocity tool-surface from each axis velocity profile highlighting trajectory portions for which cutting conditions are not respected.

show abstract

Section: Trajectory Into the Articular Spacementioning

confidence: 99%

Section: Trajectory Into the Articular Spacementioning

confidence: 99%

Kinematic Performances in 5-Axis Machining

Lavernhe

Tournier

Lartigue

2007

Advances in Integrated Design and Manufacturing in Mechanical Engineering II

View full text Add to dashboard Cite

show abstract

“…Efforts have been made to classify fiveaxis machine tools with three translational and two rotational joints, which are reciprocally orthogonal, into three basic types-rotary table (RT), spindle rotating (SR), and hybrid (HT)-according to the position of the two rotational joints, respectively [9][10][11]. Jung et al [12] built a postprocessor that is suitable for the RT-type five-axis machine tool. Lee et al [13] developed analytical equations capable of converting cutter location (CL) data and tool orientation vectors into machine control coordinates for the three representative types mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Nonlinear Error Caused by Motions of Rotation Axes for Five-Axis Machine Tools with Orthogonal Configuration

Geng

Qiu

2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Since a nonlinear relationship exists between the position coordinates of the rotation axes and components of the tool orientation, the tool will deviate from the required plane, resulting in nonlinear errors and deterioration of machining accuracy. Few attempts have been made to obtain a general formula and common rules for nonlinear error because of the existence of various kinematic structures of machine tools with orthogonal configuration. This paper analyzes the relationship between the deviation of cutter location points and motion of tool orientations. Five-axis CNC machine tools are divided into two groups according to the configuration of the two rotational joints and the home position. Motions of the tool are regarded as a combination of translation and rotation. A model for error calculation is then built. The maximum deviation of the tool with respect to the reference plane generated by the initial and the final orientation is used to quantify the magnitude of the errors. General formulas are derived and common change rules are analyzed. Finally, machining experiment is conducted to validate the theoretical analysis. The research has important implications on the selection of a particular kinematic configuration that may achieve higher accuracy for a specific machining task.

show abstract

“…While the three-axis NC machine has more advantages in large workspace and good dexterity, however, it is only suitable for simple surface or small parts processing [3,4]. The five-axis series CNC machine, adding two-degreeof-freedom rotating head attached to its mobile platform or two-degree-of-freedom rotary tables on the three-axis machine, can maintain the favourable orientation, but often scarified certain workspace, and may cause poor precision and stiffness by increasing the length of the actuator to enlarge the workspace [5,6]. So there is a contradiction between workspace and precision and stiffness for free surface machining by using the traditional series or parallel machine tool, and they cannot be able to satisfy requirements of the high speed milling for large heterogeneous complex surface in aerospace.…”

Section: Introductionmentioning

confidence: 99%

Workspace Analysis of a Hybrid Kinematic Machine Tool with High Rotational Applications

Zhang

Fang

et al. 2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

This paper presents a novel parallel manipulator with one translational and two rotational (1T2R) degrees of freedom that can be employed to form a five-degree-of-freedom hybrid kinematic machine tool for large heterogeneous complex structural component machining in aerospace field. Compared with serial or parallel machine, hybrid machine has the merits of high stiffness, high speed, large workspace, and complicated surface processing ability. To increase stiffness, three-degree-of-freedom redundantly actuated and overconstrained 2PRU-PRPS parallel manipulator (P denotes the active prismatic joint) is proposed, which is utilized as the main body of hybrid machine. By resorting to the screw theory, the degree of freedom of the proposed mechanism is briefly addressed including the initial configuration and general configuration and validated by Grübler-Kutzbach (G-K) equation. Next, kinematic inverse solution and parasitic motion of the parallel manipulator are deduced and the transformational relations between the Euler angle and Tilt-Torsion (T-T) angle are identified. Thirdly, the performance evaluation index of orientation workspace is introduced, and the reachable workspace and joint workspace are formulated. Through specific examples, the reachable workspace, task workspace, and joint workspace of the redundant actuation parallel manipulator are depicted. Compared with overstrained 2PRU-PRS parallel manipulator, corresponding analyses illustrate that the proposed parallel manipulator owns much better orientation capability and is very meaningful to the development of the five-axis hybrid machine tool.

show abstract

NC post-processor for 5-axis milling machine of table-rotating/tilting type

Cited by 92 publications

References 4 publications

Kinematic Performances in 5-Axis Machining

Kinematic Performances in 5-Axis Machining

Analysis of Nonlinear Error Caused by Motions of Rotation Axes for Five-Axis Machine Tools with Orthogonal Configuration

Workspace Analysis of a Hybrid Kinematic Machine Tool with High Rotational Applications

Contact Info

Product

Resources

About