Analysis of Key Technology of NC Turning Machining

2014 ◽  
Vol 615 ◽  
pp. 3-6
Author(s):  
Cun Xia Tian
Keyword(s):  
Process Analysis ◽  
Nc Machining ◽  
Analysis Procedure ◽  
Machining Process ◽  
Machining Accuracy ◽  
Key Technology ◽  
Cnc Turning ◽  
Machining Quality ◽  
Cnc Programming ◽  
Important Basis

Through the process of NC machining analysis, summed up the points of NC machining process analysis, through the process of a comprehensive and reasonable analysis procedure for CNC turning and CNC programming formulation provides an important basis and guarantee, so as to improve the machining quality and the machining accuracy requirements.

The Resulting Toolpath of Turning a Special Surface on CNC Lathe

2014 ◽  
Vol 599-601 ◽  
pp. 739-742
Author(s):  
Chun Xia Tian
Keyword(s):  
Tool Path ◽  
Machining Accuracy ◽  
Shape Error ◽  
Turning Process ◽  
Workpiece Surface ◽  
Circular Arc ◽  
Cnc Turning ◽  
Machining Quality ◽  
Cnc Lathe ◽  
Special Surface

The surface of workpiece in NC turning process, often encounter the workpiece surface cross quadrant arc, if the use of the same processing methods and ordinary arc, often leads to the emergence of cross quadrant arc machining shape error, through the research of the NC machining of workpiece surface cross quadrant arc, CNC turning reasonable go knife and tool path in NC turning, solve cross quadrant arc, some defects in the surface of the workpiece processing, ensure the machining with circular arc profile theory demands, so as to improve the machining quality and the machining accuracy requirements.

Study on Numerical Control Machining Technology of Full-Surface Part

2012 ◽  
Vol 510 ◽  
pp. 384-389
Author(s):  
Jin Gui Wan ◽  
Fei Zhang ◽  
Bei Hua Li ◽  
Qi Gao
Keyword(s):  
Process Analysis ◽  
Nc Machining ◽  
Numerical Control ◽  
Machining Process ◽  
Machining Parameters ◽  
Cnc Milling ◽  
Cnc Machine ◽  
Numerical Control Machining ◽  
Surface Part ◽  
Nc Code

A complex part, which has curved surface overall, is trial-manufactured with CNC machine. The NC machining process and technology of this full-surface part are studied in this paper. First, the 3D model of the part is created in the modeling module of UG system. Then, process analysis and scheme are developed. As the part has an irregular shape and the entire surface is to be NC machined, there are many difficulties during processing. The optimized process plan is determined. In the manufacturing module of UG system, the NC machining parameters are set according to the processing requirements, the tool paths are generated, edited and checked, and the NC code is generated by post processing. Finally, the part is manufactured using a 3-axis CNC milling machine with the NC programs. It has desirable shape and high accuracy. The result shows that the NC process is reasonable and efficient. CAD/CAM integration technology is applied successfully in this example. The methodology and technology introduced in this paper can provide valuable reference for processing similar parts, and it is also useful for correlational study.

Research on the Key Technology of Automatic Programming System for Line-Contact Processing

2013 ◽  
Vol 423-426 ◽  
pp. 2873-2876
Author(s):  
Kun Qi Wang ◽  
Bao Chen Yang ◽  
Lei Xiong ◽  
Le Liu
Keyword(s):  
Tool Path ◽  
Nc Machining ◽  
Machining Process ◽  
Programming System ◽  
Automatic Programming ◽  
Line Contact ◽  
Key Technology ◽  
Processing Information ◽  
On Line ◽  
Contact Processing

In view of the current situation of line contact efficiency of NC machining without automatic programing system, the automatic programming system for NC machining based on line contact processing is developed. According to the characteristics of line contact processing, the key technologies in the automatic programming system of this paper is studied. After surface modeling, the data of DXF files generated by CAD systems can be read. And the surface processing information is obtained by these data sorted. Through the design of machining process and the sorting of tool path, the tool path of line contact processing is got. Then the research of soft cut of ruled surface is completed, and the graphical automatic programming is realized.

scholarly journals In-Process Measurement of Three-Dimensional Deformations Based on Speckle Photography

2021 ◽  
Vol 11 (11) ◽  
pp. 4981
Author(s):  
Andreas Tausendfreund ◽  
Dirk Stöbener ◽  
Andreas Fischer
Keyword(s):  
Evaluation Method ◽  
Process Analysis ◽  
Plane Deformation ◽  
Three Dimensional ◽  
Machining Process ◽  
Image Correlation ◽  
Speckle Photography ◽  
Process Measurement ◽  
Out Of Plane ◽  
Plane Deformations

In the concept of the process signature, the relationship between a material load and the modification remaining in the workpiece is used to better understand and optimize manufacturing processes. The basic prerequisite for this is to be able to measure the loads occurring during the machining process in the form of mechanical deformations. Speckle photography is suitable for this in-process measurement task and is already used in a variety of ways for in-plane deformation measurements. The shortcoming of this fast and robust measurement technique based on image correlation techniques is that out-of-plane deformations in the direction of the measurement system cannot be detected and increases the measurement error of in-plane deformations. In this paper, we investigate a method that infers local out-of-plane motions of the workpiece surface from the decorrelation of speckle patterns and is thus able to reconstruct three-dimensional deformation fields. The implementation of the evaluation method enables a fast reconstruction of 3D deformation fields, so that the in-process capability remains given. First measurements in a deep rolling process show that dynamic deformations underneath the die can be captured and demonstrate the suitability of the speckle method for manufacturing process analysis.

Dynamic optimization method with applications for machine tools based on approximation model

2017 ◽  
Vol 232 (11) ◽  
pp. 2009-2022 ◽  
Author(s):  
TJ Li ◽  
XH Ding ◽  
K Cheng ◽  
T Wu
Keyword(s):  
Machine Tool ◽  
Performance Optimization ◽  
Machine Tools ◽  
Optimization Design ◽  
Natural Frequencies ◽  
Dynamic Performance ◽  
Machining Process ◽  
Machining Accuracy ◽  
Approximation Model ◽  
Dynamic Behaviors

Natural frequencies and modal shapes of machine tools have position-dependent characteristics owing to their dynamic behaviors changing with the positions of moving parts. It is time-consuming and difficult to evaluate the dynamic behaviors of machine tools and their machining accuracy at different positions. In this paper, a Kriging approximation model coupled with finite element method is proposed to substitute the dynamic equations for obtaining the position-dependent natural frequencies of a machine tool, as well as relative positions between the tool and the workpiece during the machining process. Based on the proposed method, dynamic performance optimization design of the machine tool is conducted under the condition of minimum relative positions. Three case studies are illustrated to demonstrate the implementation of the proposed method.

A Small-Line Segment Dynamic Transition Algorithm Based on Axial Error Tolerance

2016 ◽  
Vol 851 ◽  
pp. 433-438
Author(s):  
Shu Jie Sun ◽  
Hu Lin ◽  
Liao Mo Zheng ◽  
Jin Gang Yu ◽  
Bei Bei Li ◽  
...  
Keyword(s):  
Tool Path ◽  
Maximum Velocity ◽  
Error Tolerance ◽  
Contour Error ◽  
Work Piece ◽  
Machining Accuracy ◽  
Machining Efficiency ◽  
Processing Efficiency ◽  
Dynamic Transition ◽  
Machining Quality

To ensure the machining precision of work piece and improve the machining quality and machining efficiency, a dynamic transition method based on axial machining accuracy is given. Firstly, the maximum machining contour error is computed based on the axial machining accuracy, and the tool path is processed based on the machining contour error to reduce the amount of command points. Secondly, the circle transition method is used to make the tool path smoother and the machining efficiency higher. Finally, the radius of the transition circle is adjusted based on the maximum velocity of each transition circle. The experimental results shows that the method proposed could effectively satisfy the needs of the machining accuracy and improve the processing efficiency, while reduce the amount of path data.

Discussion on NC Machining Process of Thin Walled Parts Technical Measures

2014 ◽  
Vol 701-702 ◽  
pp. 864-868
Author(s):  
Da Lin Zhang ◽  
Ke Gao ◽  
Tian Rui Zhou
Keyword(s):  
Industrial Production ◽  
Nc Machining ◽  
Machining Process ◽  
Precision Machining ◽  
Thin Wall ◽  
Machining Precision ◽  
Thin Walled ◽  
Technical Measures

Thin wall parts are used more and more extensively in industrial production, analyze the influence of precision machining of thin-walled parts not higher factor, through the example of how to improve the machining precision of thin-wall parts, and gives the specific measures to solve practical problems.

Direct compensation of the spindle rotation error with an active hydrostatic journal bearing system

2021 ◽  
pp. 095440622110263
Author(s):  
Chunwang Xu ◽  
Shujiang Chen ◽  
Changhou Lu ◽  
Kang Wang ◽  
Jiaheng Sun
Keyword(s):  
Journal Bearing ◽  
Machining Process ◽  
Machining Accuracy ◽  
Accuracy Improvement ◽  
Servo Valve ◽  
Rotation Error ◽  
Spindle Rotation ◽  
Direct Compensation ◽  
Simulation And Experiment ◽  
Bearing System

Spindle rotation accuracy is important in machining process. Indirect compensation of spindle rotation error has been widely adopted in the field of machining accuracy improvement. However, there are some limitations on indirect compensation, and a little research on direct compensation can be found. This article utilizes active lubrication technology to improve the spindle rotation accuracy. Hydrostatic journal bearing with control recesses and servo valve drove by piezoelectric ceramics are adopted to compose the compensation element. The simple control strategy PID is adopted to provide control signal for servo valve. Both simulation and experiment are designed and conducted. The results show that proposed bearing system has the ability to improve the spindle rotation accuracy.

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