scholarly journals Precision Machining with Micro-Scale Vertical Machining Center

2006 ◽  
Vol 10 (2) ◽  
pp. 187-195 ◽  
Author(s):  
Daniel J. Cox ◽  
◽  
Glynn Newby ◽  
Hyung Wook Park ◽  
Steven Y. Liang ◽  
...  
Keyword(s):  
Machine Tools ◽  
Three Dimensional ◽  
Machining Process ◽  
Precision Machining ◽  
Micro Machining ◽  
Feature Size ◽  
Micro Scale ◽  
Machining Center ◽  
Geometrical Complexity ◽  
Machine Stiffness

Micro machining is an emerging technology with extremely large benefits and equally great challenges. The push to develop processes and tools capable of micro scale fabrication results from the widespread drive to reduce part and feature size in many industrial and commercial sectors. For many micro machining applications, the technology of mechanical solid tool machining offers attractive merits as it can create truly three-dimensional and one-of-a-kind parts of extremely high resolutions without significant limitation of part materials. For mechanical solid tool machining, the control of three-dimensional motions between machines, tools, and parts to sub-micron level of precision is a perquisite to the realization of manufacturing at such fine scales. One important factor that contributes to the machining process accuracy is the overall size of the machine tool due to the effects of thermal, static, and dynamic stabilities. This paper will assess the technological benefits of miniaturization of machine tools in the context of machine stiffness and accuracy. It also presents the design philosophy and configuration of a 4-axis miniaturized vertical machining center of positioning accuracy of 4 to 10nm and a machine volumetric envelop less than (300mm)3, which is several thousand times smaller than traditional machining centers. A series of tests are discussed for performance evaluation of the miniaturized machining center in terms of the achievable finish and part form accuracy with respect to the process parameters and part geometrical complexity in 1-D, 2-D, and 3-D cases.

Performance Evaluation of a Miniaturized Machining Center for Precision Manufacturing

2004 ◽  
Author(s):  
Daniel Cox ◽  
Glynn Newby ◽  
Hyung Wook Park ◽  
Steven Y. Liang
Keyword(s):  
Performance Evaluation ◽  
Machine Tools ◽  
Three Dimensional ◽  
Machining Process ◽  
Precision Manufacturing ◽  
Positioning Accuracy ◽  
Form Accuracy ◽  
Machining Center ◽  
Geometrical Complexity ◽  
Machine Stiffness

The ability to manufacture at the micrometric and even nanometric precision is in strong demand today in view of the increasing need to reduce the size of parts and products in many industrial and commercial sectors. For many of these applications, the technology of mechanical solid tool machining offers promising applicability as it can create truly three-dimensional and one-of-a-kind parts of extremely high resolutions without placing significant limitation on the part materials. For mechanical solid tool machining, the control of three-dimensional motions between machines, tools, and parts to sub-micron level of precision is a perquisite to the realization of manufacturing at such fine scales. One important factor that contributes to the machining process accuracy is the overall size of the machine tool due to the effects of thermal, static, and dynamic stabilities. This paper will assess the technological benefits of miniaturization of machine tools in the context of machine stiffness and accuracy. This paper also presents the design and configuration of a 4-axis miniaturized vertical machining center of positioning accuracy of 4 to 10 nm and a machine volumetric envelop less than 0.03m3, which is several hundred times smaller than traditional machining centers. A series of tests are discussed for performance evaluation of the miniaturized machining center in terms of the achievable finish and part form accuracy with respect to the process parameters and part geometrical complexity in 1-D, 2-D, and 3-D cases.

Optimization of Planar Honing Process for Surface Finish of Machine Tool Sliding Guideways

2017 ◽  
Vol 139 (7) ◽  
Author(s):  
Kory Chang ◽  
Masakazu Soshi
Keyword(s):  
Machine Tools ◽  
Cubic Boron Nitride ◽  
Three Dimensional ◽  
Numerical Control ◽  
Machining Process ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Manufacturing Method ◽  
Traditional Manufacturing ◽  
Sliding Guideways

Sliding guideways are often used as the foundation for linear motion in computer numerical control (CNC) machine tools due to their high damping capabilities especially for heavy duty machining applications. However, the traditional manufacturing process with grinding is time-consuming, and the product’s sliding performance has not been optimized nor clearly understood. In order to increase productivity, a machining center based manufacturing method with cubic boron nitride (CBN) milling tools was introduced and tested by researchers. While greatly reducing manufacturing time and cost, a rougher milled surface, in comparison to traditional grinding, is a possible concern for the performance as well as the life of sliding guideways. In this study, a novel planar honing process was proposed as a postprocess of CBN milling to create a finish surface on hardened cast iron sliding guideways used for CNC machine tools. A design of experiment (DOE) was conducted to statistically understand significant factors in the machining process and their relationship with surface topography. Effective planar honing conditions were discovered and analyzed with three-dimensional (3D) and two-dimensional surface parameters.

Study on Micro Mill-Grinding Technology

2013 ◽  
Vol 390 ◽  
pp. 586-590 ◽  
Author(s):  
Chao Wang ◽  
Ya Dong Gong ◽  
Guo Qiang Yin ◽  
Xue Long Wen ◽  
Jun Cheng
Keyword(s):  
Surface Roughness ◽  
Abrasive Particle ◽  
Three Dimensional ◽  
Micro Milling ◽  
Mechanical Processing ◽  
Micro Machining ◽  
Micro Scale ◽  
Abrasive Grains ◽  
Machining System ◽  
Spraying Method

Micro mechanical processing is the effective method for machining micro scale parts. Micro mill-grinding technology is presented based on micro milling and micro grinding processes. The machining principle of micro mill-grinding is studied, and compound tools for micro mill-grinding are fabricated based on spraying technology. Experiments are performed on Al 6061-T6 with the three-dimensional micro machining system. The results show that submicron surface roughness can be obtained by micro mill-grinding. Abrasive grains of mill-grinding tools fabricated by spraying method shed easily. Smaller abrasive particle size improves the surface quality and increases the tool life.

Analysis for Effect of Key Parts on Precision of High Precision Machine Center

2011 ◽  
Vol 189-193 ◽  
pp. 2107-2111 ◽  
Author(s):  
Feng Tao Wang ◽  
Lu Tao Song ◽  
Bin Zhang
Keyword(s):  
Machine Tools ◽  
Dynamic Stiffness ◽  
Dynamics Simulation ◽  
Precision Machining ◽  
Flexible Body ◽  
Body System ◽  
Flexible Coupling ◽  
Machining Precision ◽  
Machining Center ◽  
Multi Body

Increasing the machining precision of machine tools has imposed higher demands for dynamic characteristics of the key components. Taking the MDH50 precision machining center as a example, this paper established the flexible body of five key components, bed, column, spindle boxes, slipway and worktable, and built the rigid-flexible coupling systems of whole machine, based on the basic theory of multi-body system dynamics. Then the cutting force reference to the actual constraints was applied to the system and the dynamics simulation was carried out. The effect of every component on machining precision was effectively identified. Dynamic stiffness testing of the machine is based of principles of testing the transmission components dynamic stiffness, and further analysis of the each component dynamic stiffness is conducted, which can verify the accuracy of flexible body analysis.

Micro Machining Issues: Design and Machining Process

2013 ◽  
Vol 739 ◽  
pp. 238-244
Author(s):  
Samir Mekid
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
Tool Path ◽  
Machining Process ◽  
Micro Scale ◽  
Standard Scale ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Key Issues ◽  
Micro Machine

Numerical controlled high speed micromachining on desktop machines is known to induce inherently new types of errors and machining issues at micro scale. The sources of these errors are either not known, or difficult to be modeled. Some of these errors are due to the downscaling effect of machine elements to a small micro-machine. This paper attempts to explore key issues proper to micro machines that are different from standard scale NC machine tools. Experimental observations are shown to support the discussion. The knowledge gained from these phenomena is used to nurture the design methodologies of micro-scale machines, to plan a suitable tool path and hence to improve the micromachining quality. This will also ascertain the statement that direct downscaling of current machine tools is worthless.

CNC Machining and Simulation for Relief of Special-Shaped Stone

2012 ◽  
Vol 468-471 ◽  
pp. 69-73
Author(s):  
Yu Hou Wu ◽  
Hui Jie You ◽  
De Hong Zhao ◽  
Yan Liu
Keyword(s):  
Process Parameters ◽  
Feed Rate ◽  
Tool Path ◽  
Three Dimensional ◽  
Cutting Speed ◽  
Cnc Machining ◽  
Machining Process ◽  
Cutting Depth ◽  
Machining Center ◽  
Turn Milling

Use special-shaped stone turn-milling machining center (HTM50200) to achieve the production of complex relief. Through the ArtCAM establish the three dimensional relief model of Riverside Scene at Qingming Festival. Analysis of blank material characteristics and features of NC machining center, select the appropriate tool, calculate cutting depth 、cutting speed 、feed rate 、spindle speed and other process parameters by formulas. With ArtCAM/CAM module to make process of the preparation of the rough finishing, the semi-finishing and finishing, and then generate the tool path file. Simulation in VERICUT can optimize the potential collision, over-cutting and owe cut of the machining process, and the adoption of special-shaped stone machining center for milling to finalize production of the relief, summarize the experience in special-shaped stone processing.

Research on Five-Axis NC Machining Simulation for Four-Blade Propeller Based on UG&VERICUT

2014 ◽  
Vol 509 ◽  
pp. 75-79 ◽  
Author(s):  
Yan Wu ◽  
Keng Zhou ◽  
Gang Zheng ◽  
Er Geng Zhang
Keyword(s):  
Tool Path ◽  
Three Dimensional ◽  
Nc Machining ◽  
Machining Process ◽  
Solid Model ◽  
Machining Simulation ◽  
Simulation Process ◽  
Machining Center ◽  
Nc Machining Simulation ◽  
Five Axis

This paper studies the five-axis NC machining simulation process for four-blade propeller. Three-dimensional solid model of four-blade propeller is created based on UG, and then the tool path is generated using its CAM module, and finally the machining simulation is implemented on FIDIA five-axis machining center based on VERICUT. The correctness of NC machining process is verified. The method of the virtual simulation is also suitable for similar parts machining.

3D Simulation of the Ultra-Precision V-Groove Machine Tool

2016 ◽  
Vol 679 ◽  
pp. 111-115
Author(s):  
Hui Jing Huang ◽  
Wei Qiang Gao ◽  
Jian Qun Liu
Keyword(s):  
Machine Tool ◽  
Collision Detection ◽  
Three Dimensional ◽  
Numerical Control ◽  
Machining Process ◽  
3D Simulation ◽  
Precision Machining ◽  
Hardware Platform ◽  
Nc Code ◽  
Ultra Precision

This paper develops a three dimensional (3D) simulation system with QT platform and OpenGL 3D library by adopting the driver and Aerotech’s linear motor as hardware platform and INtime and A3200 controller as the software platform. The system uses numerical control (NC) code syntax checking module to test the NC code syntax and applies 3D simulation module to display the actual machining process. The interference and collision detection module is built in this system to detect the problem during the actual processing. The system therefore contributes to avoiding the trial and tests for the ultra-precision machining process and improving the machining efficiency as well as reducing the loss of ultra-precision components of machine tool due to the collision.

In Situ Topology Measurement of Micro Structured Surfaces with a Confocal Chromatic Sensor on a Desktop Sized Machine Tool

2016 ◽  
Vol 1140 ◽  
pp. 392-399
Author(s):  
Christopher Müller ◽  
Ingo G. Reichenbach ◽  
Martin Bohley ◽  
Jan Christian Aurich
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Machining Process ◽  
Measuring System ◽  
Micro Machining ◽  
Structured Surfaces ◽  
System A ◽  
Micro Structures ◽  
Tool Diameter

In this research a confocal chromatic point sensor was implemented in a desktop sized machine tool. The sensor was used to detect the surface in z-direction. Data from the machine control of the x- and y-axes is extracted and combined with the z- information of the sensor to directly scan surfaces. With the presented sensor, micro structures as small as 5 μm can be characterized. Based on the possibilities of this measuring system, face milling before the actual micro machining can be avoided by determining tilts and waviness of the workpiece. Also the effective tool diameter can be determined and compensated. After machining, the structure can be measured for quality control. Based on this measurement system, a micro machining process was developed broadening the potential for the use of desktop sized machine tools.

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