1510 Estimation of Corner Error Caused by Linear Interpolation Motion of Machining Center

2006 ◽  
Vol 2006.4 (0) ◽  
pp. 73-74
Author(s):  
Akio KUBO ◽  
Hua QIU
Keyword(s):  
Linear Interpolation ◽  
Machining Center ◽  
Corner Error

Application of Siemens 840Di System in the Reconstruction of KISC Roll Collar Grinder

2013 ◽  
Vol 437 ◽  
pp. 740-743
Author(s):  
Hai Rui Wang ◽  
Ya Li ◽  
Jian Ying Wang ◽  
Yong Yi Liao
Keyword(s):  
High Speed ◽  
Mechanistic Model ◽  
Linear Interpolation ◽  
Sculptured Surfaces ◽  
Machining Center ◽  
Mechanistic Approach ◽  
High Feed ◽  
Path Lengths ◽  
Siemens 840D

This work studies the reconstruction of high-speed roll grinder for sculptured surfaces with high feed rates. Experiments and predictions were focused on representative surfaces of dies and molds, whose geometric complexity and complexity distribution were modified parametrically. CNC programs for machining these surfaces were executed in a HERKULES HSF2CNC machining center with a SIEMENS 840D controller, with different levels of programmed feed rate. Discrepancies between programmed and actual feed rates were evaluated. A mechanistic approach for roll grinder in high-speed milling of sculptured surfaces is proposed. The mechanistic model construction is based on: (a) the frequency distribution of linear interpolation path lengths in the CNC program and (b) a characterization of the machine tool for brisk and smooth movements. Two case studies were used to demonstrate the effectiveness of the proposed approach. The reconstruction model is capable of the manufacturing.

604 On Trajectory Errors of High Speed Linear Interpolation Motion with a Small Size for Machining Center

2005 ◽  
Vol 2005.58 (0) ◽  
pp. 209-210
Author(s):  
Hua QIU ◽  
Akio KUBO ◽  
Hiroyuki IKEGAMI ◽  
Hiroshi TOMIOKA ◽  
Jyuichi YAMAMOTO ◽  
...  
Keyword(s):  
High Speed ◽  
Linear Interpolation ◽  
Machining Center

Error Estimation for Machining Center Contouring and its Experimental Verification

2011 ◽  
Vol 486 ◽  
pp. 87-90 ◽  
Author(s):  
Hua Qiu ◽  
Chao Lin
Keyword(s):  
Error Estimation ◽  
Experimental Verification ◽  
Linear Interpolation ◽  
Numerical Control ◽  
Simulation Approach ◽  
Trajectory Error ◽  
Machining Center ◽  
Simulation Calculation ◽  
Cutter Path ◽  
Motion Characteristics

This paper presents a simulation approach for estimating the trajectory error of a linear interpolation cutter path produced by the numerical control Acc/Dec motion characteristics for a MC. The algorithm is very simple and efficient for simulation calculation. Through comparing the machined profiles of workpiece with the calculated cutter path trajectories, the effectiveness of the proposed approach is sufficiently demonstrated.

Proposal of a Machining Test of Five-Axis Machining Centers Using a Truncated Square Pyramid

2012 ◽  
Vol 523-524 ◽  
pp. 475-480 ◽  
Author(s):  
Katsunori Ohta ◽  
Zhi Meng Li ◽  
Masaomi Tsutsumi
Keyword(s):  
Linear Interpolation ◽  
Test Method ◽  
Rotary Table ◽  
Evaluation Standard ◽  
Machining Center ◽  
Geometric Deviations ◽  
Machining Test ◽  
Simulation And Experiment ◽  
Universal Spindle ◽  
Five Axis

NAS 979 has been used for over 40 years as a performance evaluation standard for five-axis machining centers. This standard provides some finishing conditions of the cone-frustum under five-axis control, and prescribes the measuring methods and permissible tolerances of geometric deviations. However, this standard cannot be applied to the tilting rotary table type five-axis machining center but to the universal spindle head type one. When the standard is applied to the tilting rotary table type, it is not clear yet that the effects of the geometric and synchronous deviations which influence the measured results. Thus, there are no methods for evaluating the accuracy of linear interpolation movement under simultaneous five-axis control. This paper proposes a machining test method using a truncated square pyramid for checking the accuracy of the tilting rotary table type five-axis machining centers. In the simulation and experiment, the bottom of the truncated square pyramid with a half apex angle of 15° is mounted on a fixture with a slope of 10° or 20°, and feed velocity of each axis is analyzed by changing the center position.

Direct Interpolation of Tool Orientation in 5-Axis Milling

2011 ◽  
Vol 228-229 ◽  
pp. 402-407
Author(s):  
Bin Shen ◽  
Dang Jin Qi ◽  
Liu Qun Fan ◽  
Zhi Hao Zhu
Keyword(s):  
Surface Quality ◽  
Rotation Angle ◽  
Linear Interpolation ◽  
Machining Efficiency ◽  
Interpolation Algorithm ◽  
Tool Orientation ◽  
Inclined Plane ◽  
Machining Center ◽  
Non Linear

By circumference milling with 5-axis machine or machining center has quite the machining efficiency and the surface quality of the products been improved. But when inclined inside surface of cavity is circumference milled with the default linear interpolation of rotation angle algorithm, it results in a serious non-linear error, which takes on over cutting or under cutting, e.g. the inclined plane will be over milled by the machine with dual swivel-head machining center. In order to resolve this problem, the direct interpolation algorithm of tool orientation is developed after analyzing the algorithm of linear interpolation of rotation angles and its non-linear error is. The algorithm is reported and tested with the object of a machine with AB-axis swivel head. The testing results proved that it can resolve the problem of non-linear error.

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