Intelligent tool path correction for improving profile accuracy in CNC turning

2000 ◽  
Vol 38 (14) ◽  
pp. 3181-3202 ◽  
Author(s):  
T. S. Suneel ◽  
S.S. Pande
Keyword(s):  
Tool Path ◽  
Cnc Turning ◽  
Tool Path Correction ◽  
Profile Accuracy

Less interference tool-path correction model for half revolution penetration and retraction trajectories in internal straight thread side milling

2020 ◽  
Vol 107 (3-4) ◽  
pp. 1605-1624 ◽  
Author(s):  
Yuanhao Fan ◽  
Zihua Hu ◽  
Yiran Tang ◽  
Xudong Zhang ◽  
Changjiang Qin ◽  
...  
Keyword(s):  
Tool Path ◽  
Side Milling ◽  
Correction Model ◽  
Tool Path Correction

Development of Tool Path Correction Algorithm in Incremental Sheet Forming

2014 ◽  
Vol 622-623 ◽  
pp. 382-389 ◽  
Author(s):  
Antonio Fiorentino ◽  
G.C. Feriti ◽  
Elisabetta Ceretti ◽  
C . Giardini ◽  
C.M.G. Bort ◽  
...  
Keyword(s):  
Tool Path ◽  
Error Distribution ◽  
Sheet Forming ◽  
Incremental Sheet Forming ◽  
Correction Algorithm ◽  
Forming Process ◽  
Part Geometry ◽  
Toolpath Planning ◽  
The Difference ◽  
Tool Path Correction

The problem of obtaining sound parts by Incremental Sheet Forming is still a relevant issue, despite the numerous efforts spent in improving the toolpath planning of the deforming punch in order to compensate for the dimensional and geometrical part errors related to springback and punch movement. Usually, the toolpath generation strategy takes into account the variation of the toolpath itself for obtaining the desired final part with reduced geometrical errors. In the present paper, a correction algorithm is used to iteratively correct the part geometry on the basis of the measured parts and on the calculation of the error defined as the difference between the actual and the nominal part geometries. In practice, the part geometry is used to generate a first trial toolpath, and the form error distribution of the resulting part is used for modifying the nominal part geometry and, then, generating a new, improved toolpath. This procedure gets iterated until the error distribution becomes less than a specified value, corresponding to the desired part tolerance. The correction algorithm was implemented in software and used with the results of FEM simulations. In particular, with few iterations it was possible to reduce the geometrical error to less than 0.4 mm in the Incremental Sheet Forming process of an Al asymmetric part, with a resulting accuracy good enough for both prototyping and production processes.

A tool path correction and compression algorithm for five-axis CNC machining

2013 ◽  
Vol 26 (5) ◽  
pp. 799-816 ◽  
Author(s):  
Cong Geng ◽  
Dong Yu ◽  
Liaomo Zheng ◽  
Han Zhang ◽  
Feng Wang
Keyword(s):  
Tool Path ◽  
Compression Algorithm ◽  
Cnc Machining ◽  
Five Axis ◽  
Tool Path Correction

scholarly journals Force Prediction for Correction of Robot Tool Path in Single Point Incremental Forming

2013 ◽  
Vol 554-557 ◽  
pp. 1282-1289 ◽  
Author(s):  
Jérémy Belchior ◽  
Dominique Guines ◽  
Lionel Leotoing ◽  
Eric Ragneau
Keyword(s):  
Input Data ◽  
Tool Path ◽  
Incremental Forming ◽  
Single Point ◽  
Single Point Incremental Forming ◽  
Element Analysis ◽  
Force Prediction ◽  
Material Parameters ◽  
Tool Path Correction ◽  
Machine Structure

In this work, an off-line compensation procedure, based on an elastic modelling of the machine structure coupled with a Finite Element Analysis (FEA) of the process is applied to Robotized Single Point Incremental Forming (RSPIF). Assuming an ideal stiff robot, the FEA evaluates the Tool Center Point (TCP) forces during the forming stage. These forces are then defined as an input data of the elastic robot model to predict and correct the tool path deviations. In order to make efficient the tool path correction, the weight of three numerical and material parameters of the FEA on the predicted forces is investigated. Finally, the efficiency of the proposed method is validated by the comparison between numerical and experimental geometries obtained with or without correction of the tool path.

A Study on the Grinding to Improve Profile Accuracy of Aspheric Lens

2007 ◽  
Vol 364-366 ◽  
pp. 1168-1173
Author(s):  
Seung Yub Baek ◽  
Eun Sang Lee ◽  
Jong Koo Won
Keyword(s):  
Surface Roughness ◽  
Tool Path ◽  
Production Costs ◽  
Total Production ◽  
Precision Grinding ◽  
Aspheric Lens ◽  
Ultra Precision ◽  
Grinding Technique ◽  
Profile Accuracy ◽  
Grinding System

This study presents the development of an ultra-precision grinding system based on a new grinding technique called the “In-Process Grinding Method (IPGM)”. IPGM which is used for grinding aspheric lens increases both the production and grinding performance, and significantly decreases total production costs. To enhance the precision grinding productivity of ultra-precision aspheric lens, we present here an ultra-precision grinding system and process for the aspheric micro-lens. The tool path was calculated and CNC program generation and tool path compensation were performed for aspheric lens. Using this ultra-precision grinding system, aspheric lens, 4mm in diameter, were successfully performed. The profile error after the first grinding without any compensation was less than 0.6μm, and surface roughness Ra was 0.01μm. In-process grinding was performed with compensation. Results of the profile accuracy P-V 0.3μm and surface roughness Ra 0.006 μm were obtained.

Research on CNC Turning System Based on STEP-NC

2009 ◽  
Vol 16-19 ◽  
pp. 70-74
Author(s):  
Jun Sun ◽  
Xiao Lei Zhang ◽  
Jun Wang ◽  
Jun Song
Keyword(s):  
Feature Recognition ◽  
Tool Path ◽  
Design Method ◽  
Basic Theory ◽  
Cnc Turning ◽  
Module Design ◽  
Nc Program ◽  
Key Technologies ◽  
Turning System

Based on the STEP-NC basic theory, this paper uses the open module design method to construct a kind of CNC turning system based on STEP-NC in the integration environment of VC++6.0 and ST-Developer. The construction of system and processing of the programme and data are accomplished by using MFC class libraries, STIX and ROSE libraries, etc. This paper also studies the key technologies of the system, such as turning feature recognition, STEP-NC interpreter and tool-path generator. In the end, the STEP-NC turning simulative machining platform which can validate the correctness of STEP-NC program machining is constructed by using OpenGL technology.

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.

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