An Adaptive Feedrate Scheduling Method with Multi-constraints for Five-Axis Machine Tools

2015 ◽  
pp. 553-564 ◽  
Author(s):  
Xin Zhao ◽  
Huan Zhao ◽  
Jixiang Yang ◽  
Han Ding
Keyword(s):  
Machine Tools ◽  
Feedrate Scheduling ◽  
Scheduling Method ◽  
Five Axis

Look-ahead-window-based interval adaptive feedrate scheduling for long five-axis spline toolpaths under axial drive constraints

2020 ◽  
Vol 234 (13) ◽  
pp. 1656-1670
Author(s):  
De-Ning Song ◽  
Yu-Guang Zhong ◽  
Jian-Wei Ma
Keyword(s):  
High Efficiency ◽  
Cutting Tool ◽  
Joint Space ◽  
Cartesian Space ◽  
Feedrate Scheduling ◽  
Look Ahead ◽  
Scheduling Method ◽  
The Look ◽  
Current Interval ◽  
Five Axis

Scheduling of the five-axis spline toolpath feedrate is of great significance for high-quality and high-efficiency machining using five-axis machine tools. Due to the fact that there exists nonlinear relationship between the Cartesian space of the cutting tool and the joint space of the five feed axes, it is a challenging task to schedule the five-axis feedrate under axial drive constraints. Most existing methods are researched for routine short spline toolpaths, however, the five-axis feedrate scheduling method expressed for long spline toolpaths is limited. This article proposes an interval adaptive feedrate scheduling method based on a dynamic moving look-ahead window, so as to generate smooth feedrate for long five-axis toolpath in a piecewise manner without using the integral toolpath geometry. First, the length of the look-ahead window which equals to that of the toolpath interval is determined in case of abrupt braking at the end of the toolpath. Then, the interval permissible tangential feed parameters in terms of the velocity, acceleration, and jerk are determined according to the axial drive constraints at each toolpath interval. At the same time, the end velocity of the current interval is obtained through looking ahead the next interval. Using the start and end velocities and the permissible feed parameters of each interval, the five-axis motion feedrate is scheduled via an interval adaptive manner. Thus, the feedrate scheduling task for long five-axis toolpath is partitioned into a series of extremely short toolpaths, which realizes the efficient scheduling of long spline toolpath feedrate. Experimental results on two representative five-axis spline toolpaths demonstrate the feasibility of the proposed approach, especially for long toolpaths.

An improved feedrate scheduling method for NURBS interpolation in five-axis machining

2020 ◽  
Vol 64 ◽  
pp. 70-90 ◽  
Author(s):  
Yicun Sang ◽  
Chenglin Yao ◽  
Yiqian Lv ◽  
Gaiyun He
Keyword(s):  
Feedrate Scheduling ◽  
Nurbs Interpolation ◽  
Scheduling Method ◽  
Five Axis

scholarly journals Feedrate scheduling method for constant peak cutting force in five-axis flank milling process

2020 ◽  
Vol 33 (7) ◽  
pp. 2055-2069 ◽  
Author(s):  
Liping WANG ◽  
Xing YUAN ◽  
Hao SI ◽  
Feiyu DUAN
Keyword(s):  
Cutting Force ◽  
Milling Process ◽  
Flank Milling ◽  
Feedrate Scheduling ◽  
Scheduling Method ◽  
Five Axis

Feedrate scheduling of a five-axis hybrid robot for milling considering drive constraints

2021 ◽  
Vol 112 (11-12) ◽  
pp. 3117-3136
Author(s):  
Guangxi Li ◽  
Haitao Liu ◽  
Wei Yue ◽  
Juliang Xiao
Keyword(s):  
Feedrate Scheduling ◽  
Five Axis

scholarly journals Influence of Tool Length and Profile Errors on the Inaccuracy of Cubic-Machining Test Results

2021 ◽  
Vol 5 (2) ◽  
pp. 51
Author(s):  
Zongze Li ◽  
Hiroki Ogata ◽  
Ryuta Sato ◽  
Keiichi Shirase ◽  
Shigehiko Sakamoto
Keyword(s):  
Machine Tools ◽  
Test Accuracy ◽  
Test Results ◽  
Machining Error ◽  
Tool Profile ◽  
Machining Test ◽  
The Difference ◽  
Side Error ◽  
Profile Errors ◽  
Five Axis

A cubic-machining test has been proposed to evaluate the geometric errors of rotary axes in five-axis machine tools using a 3 × 3 zone area in the same plane with different tool postures. However, as only the height deviation among the machining zones is detected by evaluating the test results, the machining test results are expected to be affected by some error parameters of tool sides, such as tool length and profile errors, and there is no research investigation on how the tool side error influences the cubic-machining test accuracy. In this study, machining inaccuracies caused by tool length and tool profile errors were investigated. The machining error caused by tool length error was formulated, and an intentional tool length error was introduced in the simulations and actual machining tests. As a result, the formulated and simulated influence of tool length error agreed with the actual machining results. Moreover, it was confirmed that the difference between the simulation result and the actual machining result can be explained by the influence of the tool profile error. This indicates that the accuracy of the cubic-machining test is directly affected by tool side errors.

scholarly journals Study of Machining of Gears with Regular and Modified Outline Using CNC Machine Tools

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2913
Author(s):  
Rafał Gołębski ◽  
Piotr Boral
Keyword(s):  
Machine Tools ◽  
Coordinate Measuring Machine ◽  
Optical Microscope ◽  
Numerical Control ◽  
Cnc Machine Tools ◽  
Cnc Milling ◽  
Cnc Machine ◽  
Cylindrical Gears ◽  
Measuring Machine ◽  
Five Axis

Classic methods of machining cylindrical gears, such as hobbing or circumferential chiseling, require the use of expensive special machine tools and dedicated tools, which makes production unprofitable, especially in small and medium series. Today, special attention is paid to the technology of making gears using universal CNC (computer numerical control) machine tools with standard cheap tools. On the basis of the presented mathematical model, a software was developed to generate a code that controls a machine tool for machining cylindrical gears with straight and modified tooth line using the multipass method. Made of steel 16MnCr5, gear wheels with a straight tooth line and with a longitudinally modified convex-convex tooth line were machined on a five-axis CNC milling machine DMG MORI CMX50U, using solid carbide milling cutters (cylindrical and ball end) for processing. The manufactured gears were inspected on a ZEISS coordinate measuring machine, using the software Gear Pro Involute. The conformity of the outline, the tooth line, and the gear pitch were assessed. The side surfaces of the teeth after machining according to the planned strategy were also assessed; the tests were carried out using the optical microscope Alicona Infinite Focus G5 and the contact profilographometer Taylor Hobson, Talysurf 120. The presented method is able to provide a very good quality of machined gears in relation to competing methods. The great advantage of this method is the use of a tool that is not geometrically related to the shape of the machined gear profile, which allows the production of cylindrical gears with a tooth and profile line other than the standard.

Product-of-exponential formulas for precision enhancement of five-axis machine tools via geometric error modeling and compensation

2015 ◽  
Vol 81 (1-4) ◽  
pp. 289-305 ◽  
Author(s):  
Guoqiang Fu ◽  
Jianzhong Fu ◽  
Hongyao Shen ◽  
Yuetong Xu ◽  
Yu’an Jin
Keyword(s):  
Machine Tools ◽  
Geometric Error ◽  
Error Modeling ◽  
Five Axis

Energy Saving in Five-Axis Machine Tools Using Synchronous and Contouring Control and Verification by Machining Experiment

2015 ◽  
Vol 62 (9) ◽  
pp. 5608-5618 ◽  
Author(s):  
Naoki Uchiyama ◽  
Yuki Ogawa ◽  
Abd El Khalick M. ◽  
Shigenori Sano
Keyword(s):  
Energy Saving ◽  
Machine Tools ◽  
Contouring Control ◽  
Five Axis
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