Transcriptional Characteristics of Quadrant Glitches on Machined Surface – Influence of Tool Diameter and Feed Rate –

2020 ◽  
Vol 14 (5) ◽  
pp. 801-807
Author(s):  
Tadahiro Nishiguchi ◽  
Keyword(s):  
Machine Tool ◽  
Machined Surface ◽  
Motion Direction ◽  
Stick Slip ◽  
Nc Machine Tool ◽  
Nc Machine ◽  
Tool Diameter ◽  
Feed Drive System ◽  
Machined Surfaces

When a three-dimensional shape is machined by NC machine tool, motion errors occur around the motion direction changing points of the translational axis. This has a significant influence on a quality of machined surfaces. Therefore, much research on the influence of motion errors around the motion direction changing points of the feed drive system on a machined surface has been conducted to improve the quality of machined surfaces by NC machine tool. Among the motion errors that occur around the motion direction changing points of the translational axis, quadrant glitches with a stick-slip motion have a particularly large influence on the machined surface, and research on compensation methods continues to be reported. However, the transcriptional characteristics of quadrant glitches of the translational axis for machine tools have not been investigated adequately. In this study, the transcriptional characteristics of quadrant glitches of the translational axis on a machined surface were investigated. In addition, the influences of various factors on the transcriptional characteristics of quadrant glitches on a machined surface were investigated using a proposed equation and actual machining tests.

Superconducting EMS feed drive system of NC machine tool

2014 ◽  
Vol 74 (5-8) ◽  
pp. 1053-1060 ◽  
Author(s):  
Wenxue Jiang ◽  
Kai Zhou ◽  
Jiangwei Lv ◽  
Yanwu Men
Keyword(s):  
Machine Tool ◽  
Drive System ◽  
Nc Machine Tool ◽  
Feed Drive ◽  
Nc Machine ◽  
Feed Drive System

Desktop NC Machine Tool With Abilities of Compliant Motion and Stick-Slip Motion

2009 ◽  
Author(s):  
Fusaomi Nagata ◽  
Shintaro Tani ◽  
Takanori Mizobuchi ◽  
Tetsuo Hase ◽  
Zenku Haga ◽  
...  
Keyword(s):  
Machine Tool ◽  
Feedback Loop ◽  
Force Feedback ◽  
Stick Slip ◽  
Compliant Motion ◽  
Nc Machine Tool ◽  
Feedforward Loop ◽  
Nc Machine ◽  
Stick Slip Motion ◽  
Slip Motion

In this paper, a new desktop NC machine tool, which has abilities of compliant motion and stick-slip motion, is first presented for finishing small metallic molds with curved surface. The NC machine tool consists of three single-axis robots with a high position resolution of 1μm. A thin wood stick tool is attached to the tip of the z-axis. The tool tip has a small ball-end shape. The control system is composed of a force feedback loop, position feedback loop and position feedforward loop. The force feedback loop controls the polishing force consisting of tool contact force and kinetic friction forces. The position feedback loop controls the position in pick feed direction, e.g., z-direction. The position feedforward loop leads the tool tip along a desired trajectory called cutter location data (CL data). The CL data are generated from the main-processor of a CAM system. The proposed NC machine tool has realized a compliant motion required for the surface following control along a spiral path. In order to improve the finishing performance, a small stick-slip motion control strategy is further added to the control system. The small stick-slip motion is orthogonally generated to the direction of the tool moving direction. Generally, the stick-slip motion is an undesirable phenomenon and should be eliminated in precision machineries. However, the proposed NC machine tool employs a small stick-slip motion to improve the finishing quality. The effectiveness of the NC machine tool was examined through an actual finishing test of a LED lens mold with a diameter of 4 mm. It was observed that the undesirable cusps can be removed uniformly. And, it was confirmed from the results that the proposed finishing strategy by using the stick-slip motion control is effective to achieve a higher quality surface like a mirror finishing.

Simulation of the Mathematical Model for Lathe Tool Cutter

2010 ◽  
Vol 156-157 ◽  
pp. 1297-1300
Author(s):  
Xue Bin Liu ◽  
Wei Zhao ◽  
Su Chang Ma ◽  
Chong Ning Li
Keyword(s):  
Mathematical Model ◽  
Machine Tool ◽  
Virtual Environment ◽  
Simulation Software ◽  
Numerical Control ◽  
Nc Machine Tool ◽  
Nc Machine ◽  
The Mathematical Model ◽  
Lathe Tool

The numerical controlling simulation of process indicates a mapping of NC machine tool in the virtual environment, and it includes the technique of manufacture, the theories of NC machine tool, CAD, CAM, and the technique of modeling and simulating. The people can apperceive the virtual environment of 3D simulated model developed by computers, carry the NC process of parts in virtual condition before the true doing when we design or alter a project, inspect the exactitude and justification of NC program, evaluate and optimize the project of process. Thereby the intention, abridging the time of developing products, depressing the cost of manufacture, advancing the quality of products and the efficiency of Production, can be finally achieved. With the rapid development of NC technique and computer graphical technology and the extensive application of computer, NC simulation technology provide an effective tool in order to validate the NC machining program and forecast the machine process. The main purpose of this dissertation is to derive the mathematical model and to simulate the lathe tool cutter. In order to enhance the operating efficiency and the demonstration quality of the numerical control lathe simulation software, the analysis has compared a kind of shape about lathe tool cutter-- PARALLELOGRAM, has established the cutter forms, thus inferred the mathematical model of the numerical control lathe simulation on the lathe tool cutter. The cutter is display in the DELPHI software development platform based on the environments of GLSence using this derived mathematical model.

Model Research on Special Metal Cutting NC Machine Tool

2007 ◽  
Vol 10-12 ◽  
pp. 806-811
Author(s):  
Tong Zhao ◽  
P.Q. Ye ◽  
H. Zhang ◽  
X.K. Wang
Keyword(s):  
Machine Tool ◽  
Metal Cutting ◽  
Relation Module ◽  
Nc Machine Tool ◽  
Model Research ◽  
Unit Model ◽  
Proposed Model ◽  
Control Research ◽  
Function Unit ◽  
Nc Machine

In this paper the model of special metal cutting NC machine Tool is presented, which consists of a base module, an overall control module, particular functional modules as well as a relation module. Each module involved in aforementioned model will be composed by software, hardware and mechanical parts, so as to combine the convergence of the ideas of modularization and mechanical-electrical integration into current understanding of special NC machine tool through the proposed model. Specially, the relation module is introduced to deal with the linking among all the other modules. The presented model aims to broaden the perspective of machine designers intending to increase the efficiency in machine design. By giving the so-called function unit model a novel modeling approach is delivered to carry out control research of special metal cutting NC machine, which is followed by the formalization description method presented as a possible abstraction methodology towards the efficient description and identification of special metal cutting NC machine tool.

The Coupling Characteristic of HSK Tool-Holder/Spindle Interface for High-Speed NC Machine Tool

2014 ◽  
Vol 590 ◽  
pp. 121-125 ◽  
Author(s):  
Wen Kai Jie ◽  
Jian Chen ◽  
Deng Sheng Zheng ◽  
Gui Cheng Wang
Keyword(s):  
Machine Tool ◽  
Rotational Speed ◽  
High Speed ◽  
Nonlinear Finite Element Method ◽  
High Rotational Speed ◽  
Tool Holder ◽  
Nc Machine Tool ◽  
Machine Tool Accuracy ◽  
Nc Machine ◽  
Coupling Characteristic

The coupling characteristic of the tool-holder/spindle interface in high speed NC machine has significant influence on machine tool accuracy and process stability. With the example of HSK-E63, based on nonlinear finite element method (FEM), the coupling characteristic of the tool-holder/spindle interface under high rotational speed was investigated, the influence of interference, clamping force and rotational speed on the contact stress and the sectional area of clearance were discussed in detail. The results can be used as theoretical consideration to design and optimize the high speed tool-holder/spindle interface.

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