scholarly journals Optimization of Tool Path for Uniform Scallop-Height in Ultra-precision Grinding of Free-form Surfaces

2019 ◽  
Vol 2 (4) ◽  
pp. 215-224 ◽  
Author(s):  
Shanshan Chen ◽  
Chi Fai Cheung ◽  
Feihu Zhang ◽  
Mingyu Liu
Keyword(s):  
Tool Path ◽  
Free Form ◽  
Precision Grinding ◽  
Scallop Height ◽  
Ultra Precision ◽  
Free Form Surfaces

Constant Scallop-height Machining of Free-form Surfaces

1994 ◽  
Vol 116 (2) ◽  
pp. 253-259 ◽  
Author(s):  
K. Suresh ◽  
D. C. H. Yang
Keyword(s):  
Tool Path ◽  
End Milling ◽  
Free Form ◽  
Machining Time ◽  
Scallop Height ◽  
Location Data ◽  
Tool Paths ◽  
Novel Approach ◽  
Constant Scallop Height ◽  
Free Form Surfaces

A novel approach for the NC tool-path generation of free-form surfaces is presented. Traditionally, the distance between adjacent tool-paths in either the Euclidean space or in the parametric space is kept constant. Instead, in this work, the scallop-height is kept constant. This leads to a significant reduction in the size of the CL (cutter location) data accompanied by a reduction in the machining time. This work focuses on the zig-zag (meander) finishing using a ball-end milling cutter.

A Higher-Order Formula of Path Interval for Tool-Path Generation

2011 ◽  
Vol 5 (5) ◽  
pp. 663-668 ◽  
Author(s):  
Toshiyuki Obikawa ◽  
◽  
Tsutomu Sekine ◽  
Keyword(s):  
Surface Roughness ◽  
Fourth Order ◽  
Tool Path ◽  
Order Term ◽  
Computational Cost ◽  
Tool Path Generation ◽  
Free Form ◽  
Path Generation ◽  
Scallop Height ◽  
Free Form Surfaces

This paper presents a novel fourth-order formula for determining path intervals and comprehensively considers path interval formulas. In tool-path generation, a path interval is generally formulated as a scallopheight polynomial. Controlling scallop height in mechanical machining improves surface roughness or machining efficiency. We derived a novel fourth-order formula for determining path intervals after reviewing several formulas, then compared formulas. This clarified the differences between path interval formulas with graphic evidence. In micromechanical machining, an approximate expression has an advantage in computational cost but a disadvantage in accuracy. Although our proposed formula includes the fourth order-term scallop height, it requires low computational cost and can be applied to the determining path intervals for free-form surfaces in micromechanical machining. In addition, a correction method of the surface roughness on a free-form surface measured with a profilometer was proposed.

Research on Machining Simulation System for Optical Free-Form Surfaces

2010 ◽  
Vol 97-101 ◽  
pp. 3020-3023
Author(s):  
Yong Hu ◽  
Ming Xu Xu ◽  
Jun Zhang ◽  
Bo Mao ◽  
Xiao Qin Zhou
Keyword(s):  
Tool Path ◽  
Simulation System ◽  
Diamond Turning ◽  
Machining Process ◽  
Free Form ◽  
Nc Code ◽  
Development Cycle ◽  
Manufacturing Errors ◽  
Ultra Precision ◽  
Free Form Surfaces

This paper presents a new simulation system for ultra-precision diamond turning of optical free-form surfaces based on fast tool servo (FTS). The functions including evaluation and analysis of optical free-form surfaces manufacturing errors, optimization for tool path, etc, are proposed. The simulation modules and functional structure of the system are designed in accordance with the functions. The errors in the process of machining can be found in advance through the simulation. Then the NC code will be modified timely. The proposed method can be used to improve product quality, shorten the development cycle, reduce costs and optimize machining process.

Application of Convex Hull for Tool Interference Avoidance in 5-Axis CNC Machining

1996 ◽  
Author(s):  
Yuan-Shin Lee ◽  
Tien-Chien Chang
Keyword(s):  
Convex Hull ◽  
Tool Path ◽  
Correction Method ◽  
Nc Machining ◽  
Cnc Machining ◽  
Free Form ◽  
Interference Avoidance ◽  
Tool Interference ◽  
Free Form Surface ◽  
Free Form Surfaces

Abstract In this paper, a methodology of applying convex hull property in solving the tool interference problem is presented for 5-axis NC machining of free-form surfaces. Instead of exhausted point-by-point checking for possible tool interference, a quick checking can be done by using the convex hull constructed from the control polygon of free-form surface modeling. Global tool interference in 5-axis NC machining is detected using the convex hull of the free-form surface. A correction method for removing tool interference has also been developed to generate correct tool path for 5-axis NC machining. The inter-surface tool interference can be avoided by using the developed technique.

scholarly journals Iso-level tool path planning for free-form surfaces

2014 ◽  
Vol 53 ◽  
pp. 117-125 ◽  
Author(s):  
Qiang Zou ◽  
Juyong Zhang ◽  
Bailin Deng ◽  
Jibin Zhao
Keyword(s):  
Path Planning ◽  
Tool Path ◽  
Free Form ◽  
Tool Path Planning ◽  
Free Form Surfaces

scholarly journals Evaluating the Roughness According to the Tool Path Strategy When Milling Free Form Surfaces for Mold Application

Procedia CIRP ◽  
2014 ◽  
Vol 14 ◽  
pp. 188-193 ◽  
Author(s):  
Adriano Fagali de Souza ◽  
Adriane Machado ◽  
Sueli Fischer Beckert ◽  
Anselmo Eduardo Diniz
Keyword(s):  
Tool Path ◽  
Free Form ◽  
Free Form Surfaces

Surface Quality Prediction in Case of Steep Free Form Surface Milling

2016 ◽  
Vol 686 ◽  
pp. 119-124 ◽  
Author(s):  
Balázs Mikó
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Tool Path ◽  
Complex Geometry ◽  
Cutting Parameters ◽  
Free Form ◽  
Milling Cutter ◽  
Good Surface ◽  
2.5D Milling ◽  
Free Form Surfaces

The machining of free form surfaces is a current and important issue in die and mould industry. Beside the complex geometry, an accurate and productive machining and good surface quality are needed. The finishing milling carried out by a ball-end or toroid milling cutter defines the surface quality, which is characterized by the surface roughness and the tool path trace. The surface quality is defined by the properties of the milling cutter, the type of surface and its position, as well as the cutting parameters. This article focuses on the z-level milling of steep surfaces by 2.5D milling strategy. The importance of the different elements of the tool path is presented, the effect of cutting parameters is investigated, and a formula to predict the surface roughness is suggested.

Adaptive iso-planar tool path generation for machining of free-form surfaces

2003 ◽  
Vol 35 (2) ◽  
pp. 141-153 ◽  
Author(s):  
S. Ding ◽  
M.A. Mannan ◽  
A.N. Poo ◽  
D.C.H. Yang ◽  
Z. Han
Keyword(s):  
Tool Path ◽  
Tool Path Generation ◽  
Free Form ◽  
Path Generation ◽  
Free Form Surfaces
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