Investigation on machining accuracy with wireless tool holder under constant feed speed at milling point with a five axis controlled machining center considering approach path

2020 ◽  
Vol 2020 (0) ◽  
pp. S13101
Author(s):  
Takamaru SUZUKI ◽  
Shoya IWAMA ◽  
Toshiki HIROGAKI ◽  
Eiichi AOYAMA
Keyword(s):  
Machining Accuracy ◽  
Feed Speed ◽  
Tool Holder ◽  
Machining Center ◽  
Five Axis

Investigation of Motion Control of Liner Axes and a Rotary Axis Under Constant Feed Speed Vector at Milling Point With a Five-Axis Machining Center

2013 ◽  
Author(s):  
Yuma Maruyama ◽  
Takayuki Akai ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Keiji Ogawa
Keyword(s):  
Surface Roughness ◽  
Present Report ◽  
Sudden Change ◽  
Machining Accuracy ◽  
Feed Speed ◽  
Motion Error ◽  
Rotary Axis ◽  
Machining Center ◽  
Five Axis ◽  
Cutting Point

Recently, a novel manufacturing technology has spread out with a five-axis machining center. It is especially important to keep the surface roughness on an entire machined surface constant. Thus, we proposed a novel method for maintaining a constant feed speed vector at the cutting point between the end-mill tool and the workpiece surface by controlling two linear axes and a rotary axis with a five-axis machining center. In the present report, we focused on machining the combined inner and outer radius curvature and investigating the influence of synchronous control error between the linear axes and rotary axis on the machining accuracy and surface roughness. As a result, we determined that it is possible to suppress sudden change in the synchronous motion error by accurately aligning the motion direction of the linear and rotary axes and the feed speed vector at milling point at the contact point of the inner and outer circles.

scholarly journals Improvement of machined accuracy under constant feed speed at milling point with a five axis controlled machining center considering approach path

2020 ◽  
Vol 86 (889) ◽  
pp. 20-00175-20-00175
Author(s):  
Takamaru SUZUKI ◽  
Shoya IWAMA ◽  
Toshiki HIROGAKI ◽  
Eiichi AOYAMA
Keyword(s):  
Feed Speed ◽  
Machining Center ◽  
Five Axis

Sensitivity Analysis Between Error Motions and Machined Shape Errors in Five-Axis Machining Centers: In Case of S-Shaped Machining Test by a Square End Mill

2019 ◽  
Author(s):  
Zongze Li ◽  
Ryuta Sato ◽  
Keiichi Shirase ◽  
Yukitoshi Ihara
Keyword(s):  
Sensitivity Analysis ◽  
Coordinate System ◽  
Complex Surface ◽  
Machining Accuracy ◽  
Machined Surface ◽  
Machining Center ◽  
Shape Errors ◽  
Machining Test ◽  
Tool Motion ◽  
Five Axis

Abstract Five-axis machining center, combined three linear and two rotary axes, has been increasingly used in complex surface machining. However, as the two additional axes, the machined surface under table coordinate system is usually different from the tool motion under machine coordinate system, and as a result, it is very tough to predict the machined shape errors caused by each axes error motions. This research presents a new kind of sensitivity analysis method, to find the relationship between error motions of each axis and geometric errors of machined shape directly. In this research, the S-shaped machining test is taken as a sample to explain how the sensitivity analysis makes sense. The results show that the presented sensitivity analysis can investigate how the error motions affect the S-shaped machining accuracy and predicted the influence of error motions on certain positions, such as the reversal errors of the axes around motion reversal points. It can be proved that the presented method can help the five-axis machining center users to predict the machining errors on the designed surface of each axes error motions.

Influence of NC Control System on S-shaped Machining Accuracy of Five-axis Machining Center

2018 ◽  
Vol 2018 (0) ◽  
pp. S1310003
Author(s):  
Zongze LI ◽  
Ryuta SATO ◽  
Keiichi SHIRASE ◽  
Yukitoshi IHARA
Keyword(s):  
Control System ◽  
Machining Accuracy ◽  
Machining Center ◽  
Five Axis

scholarly journals Investigation on End-mill Cutter Location Based on Constant Feed-speed Vector at Cutting Point with a Five-axis Machining Center

2010 ◽  
Vol 76 (8) ◽  
pp. 912-917 ◽  
Author(s):  
Toshiki HIROGAKI ◽  
Eiichi AOYAMA ◽  
Keiji OGAWA ◽  
Tsugutoshi KAWAGUCHI ◽  
Takahiro HORIUCHI
Keyword(s):  
Feed Speed ◽  
End Mill ◽  
Machining Center ◽  
Mill Cutter ◽  
Five Axis ◽  
Cutting Point

Motion Tuning Method of Linear Axes and Rotary Axis Under a Constant Cutting Speed Vector at End-Milling Point With a Five-Axis Controlled Machining Center

2015 ◽  
Author(s):  
Takamaru Suzuki ◽  
Takakazu Ikegami ◽  
Takayuki Akai ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
...  
Keyword(s):  
Surface Quality ◽  
End Milling ◽  
High Surface ◽  
Cutting Speed ◽  
Surface Shape ◽  
Feed Speed ◽  
Shape Error ◽  
Rotary Axis ◽  
Machining Center ◽  
Five Axis

Recently It is difficult to maintain the high surface quality ingenerating curved surface shape under five-axis controlled end-milling. In this study, we aimed at maintaining feed speed vector at milling point by controlling two linear axes and a rotary axis with a five-axis machining center, to improve machined surface quality and suggested a method for solving shape error of machined workpiece considering differences of three axes’s sarvo characteristics. As the results, it could be seen that shape error greatly decreased based on the proposed method.

Design and Analysis of a Sawing-Milling Compound Machining Center for Special-Shaped Stone Products

2014 ◽  
Vol 610 ◽  
pp. 123-128
Author(s):  
Do Hong Zhao ◽  
Jing Sun ◽  
Ke Zhang ◽  
Yu Hou Wu ◽  
Feng Lu
Keyword(s):  
High Efficiency ◽  
Dynamic Performance ◽  
Processing Technology ◽  
Machining Accuracy ◽  
Processing Capacity ◽  
Under Five ◽  
Machining Center ◽  
Simultaneous Control ◽  
Five Axis ◽  
Better Than

Nowadays, the equipment for processing special-shaped stone products is developing towards high efficiency, intelligent and multifunction. Based on the features of stone processing technology, a sawing-milling compound machining center with eight axes and double five-axis simultaneous control for special-shaped stone products was designed. The dynamic performance and processing capacity were tested. Research shows that the sawing and milling compound machining in the same horizontal slide saddle is practicable. This machine can realize both vertical and horizontal machining under five-axis simultaneous control, and its machining accuracy is better than the normal industrial standard.

Improved Accuracy of a Machining Tool With a Constant Cutting Speed Vector and Outside Approach Path

2020 ◽  
Author(s):  
Takamaru Suzuki ◽  
Shoya Iwama ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Takakazu Ikegami ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Cutting Speed ◽  
Feed Speed ◽  
Actual Process ◽  
Shape Error ◽  
Direct Drive ◽  
Wireless Internet ◽  
Machined Surface ◽  
Machining Center ◽  
Five Axis

Abstract A five-axis machining center is equipped with a direct drive motor on a rotary axis and is capable of synchronous control, which makes it a feasible tool for quickly and accurately machining complicated three-dimensional surfaces such as propellers and hypoid gears. However, the accuracy of the machined shape and consistency of the freeform machined surface both need to be improved. We developed a method for maintaining the feed speed vector at the milling point by controlling three axes of the five-axis machining center (two linear and one rotary) to improve the quality of the machined surface considering differences in the servo characteristics of the three axes during the actual process. Experimental results showed that using the proposed method with an outside approach path for the machining tool greatly reduced the shape error. The effectiveness of the proposed method was verified by using a wireless Internet of Things holder to monitor the machining force.

Coupled Model of Rotary-Tilting Spindle Head for Pose-Dependent Prediction of Dynamics

2018 ◽  
Vol 140 (8) ◽  
Author(s):  
Chao Du ◽  
Jun Zhang ◽  
Dun Lu ◽  
Huijie Zhang ◽  
Wanhua Zhao
Keyword(s):  
Dynamic Model ◽  
Tool Path ◽  
Contact Stiffness ◽  
Rigid Bodies ◽  
Modal Testing ◽  
Mode Shapes ◽  
Machining Accuracy ◽  
Flexible Joints ◽  
Tool Holder ◽  
Five Axis

Five-axis machine with rotary-tilting spindle head (RTSH) is always used for sculptured surface machining, and the tool-tip dynamics in various machining postures along the tool path directly affect the machining accuracy and stability. To rapidly evaluate the tool-tip dynamics at different postures during the structural design of tool-spindle-spindle head (TSSH) assembly, this paper proposes a coupled dynamic model of tool-spindle-bearing system (TSBS) and RTSH. The model is a rigid-flexible multibody dynamic model with 36 degrees-of-freedom (DOFs), where in the rotary shaft, swivel shaft and housing are treated as rigid bodies; the tool, tool holder, and spindle shaft are modeled by reduced beams; the bearings and flexible joints are modeled as spring-damping elements. The fully Cartesian coordinates and Lagrangian method are employed to deduce a general parametric dynamic equation. The analytical method for calculating the contact stiffness of bearings and flexible joints is systematically presented, including tool-holder joint, holder-spindle joint, spindle bearings, hirth coupling, and the bearings and locking joints of rotary and swivel shafts. The model is verified by the frequency response functions (FRFs) testing and modal testing at different postures. The experimental results show that the proposed model can be used for accurate and efficient evaluation of the tool-tip FRFs, natural frequencies and mode shapes of TSSH at an arbitrary posture.

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