scholarly journals Machining accuracy increase on machines through error minimization in cutting-tool systems

2016 ◽  
Vol 1 (12) ◽  
pp. 35-39
Author(s):  
Ольга Казакова ◽  
Olga Kazakova ◽  
Андрей Казаков ◽  
Andrey Kazakov
Keyword(s):  
Cutting Tool ◽  
Machining Accuracy ◽  
Error Minimization ◽  
Tool Holder ◽  
Manufacturing Quality ◽  
Automatic Tool Change ◽  
Accuracy Increase ◽  
Automatic Tool

The problems of accuracy increase at machining are considered, in particular: error minimization in a taper part of a tool-holder at automatic tool change, the development of recommendations on cone manufacturing quality.

Mathematical Model for the Influence of Machine Tool Parts Deformation on Machining Accuracy

2014 ◽  
Vol 556-562 ◽  
pp. 1354-1357
Author(s):  
Li Gong Cui ◽  
Gui Qiang Liang ◽  
Fang Shao
Keyword(s):  
Mathematical Model ◽  
Mathematical Method ◽  
Machine Tool ◽  
Cutting Tool ◽  
Lower Surface ◽  
Design Stage ◽  
Machining Accuracy ◽  
Cutting Point ◽  
The Mathematical Model

This paper presents a mathematical method to analyze the influence of each machine tool part deformation on the machining accuracy. Taking a 3-axis machine tool as an example, this paper divides the machine tool into the cutting tool sub-system and workpiece sub-system. Taking the deformation of lower surface of the machine bed as the research target, the mathematical model of the deformation on the displacement of the cutting point was established. In order to distribute the stiffness of each part, the contribution degree of each part on the machining accuracy was analyzed. Using this mathematical model, the stiffness of each part can be distributed at the design stage of the machine tool, and the machining accuracy of the machine tool can be improved economically.

intraOcular RoBotic Interventional System (iORBIS): Mechanical design for distally-actuated instrument insertion and automatic tool change

2022 ◽  
Vol 167 ◽  
pp. 104568
Author(s):  
Cheng-Wei Chen ◽  
Hsing-Chi Chen ◽  
Hung-Yu Yang ◽  
Xiang-Yan Zeng ◽  
Xian-Hao Wu ◽  
...  
Keyword(s):  
Mechanical Design ◽  
Automatic Tool Change ◽  
Automatic Tool

Influence of Tool Holder Material on Interfacial, Insert and Tool Holder Temperatures During Turning Operation of Gray Iron

2012 ◽  
Author(s):  
Almir K. Kaminise ◽  
Gilmar Guimaraes ◽  
Marcio B. Da Silva
Keyword(s):  
Temperature Distribution ◽  
Carbon Steel ◽  
Cutting Tool ◽  
Gray Iron ◽  
Cutting Fluid ◽  
Interface Temperature ◽  
Turning Operation ◽  
Tool Holder ◽  
Cutting Insert ◽  
Thermocouple Method

Usually studies related to machining temperature consider a system comprised of workpiece, chip and cutting tool, the effect of tool holder material is not taken in account. However, due to its physical properties, the tool holder material, usually carbon steel, has effect in the dissipation of the heat generated. This work studies the effect of the tool holder material on the temperature distribution during the turning operation of gray iron using cemented carbide cutting tool and without cutting fluid. Five tool holders were manufactured from materials with different heat conductivity: carbon steel, stainless steel, titanium, copper and bronze. Temperatures in eight different positions in the tool holder and cutting insert were measured. The average temperature at the chip tool interface was also measured using the tool-work thermocouple method. The results showed that the measured chip tool interface temperature was less affected by the tool holder material, although the temperature distribution at the cutting tool is highly affected.

Modeling and Modal Analysis of Tool Holder-Spindle Assembly on CNC Milling Machine Using FEA

2012 ◽  
Vol 157-158 ◽  
pp. 220-226 ◽  
Author(s):  
Jun Wang ◽  
Bo Wu ◽  
You Min Hu ◽  
Er Hua Wang ◽  
Yao Cheng
Keyword(s):  
Modal Analysis ◽  
Spindle Assembly ◽  
Machining Accuracy ◽  
Cnc Milling ◽  
Element Analysis ◽  
Modeling And Analysis ◽  
Tool Holder ◽  
Cnc Milling Machine ◽  
Rigid Connection ◽  
Translational Spring

In machine dynamics the modal analysis of tool holder-spindle assembly is carried out to verify the reasonability of spindle speed, recognize the impaction of vibration modes on machining accuracy and optimize the design of spindle. This paper presents modeling and modal analysis of tool holder-spindle assembly utilizing FEA. Bearing supports is simulated by four uniformly distributed translational spring-damper elements and the radial stiffness of bearings is calculated based on Hertz contact theory. The connection at the tool holder-spindle interface is assumed to be the rigid-connection. This study also proposes two numerical methods in the finite element analysis software ANSYS to simulate the rigid-connection. Consequently, the present modeling and analysis approach by use of FEA is feasible for analyzing tool holder-spindle assembly dynamics.

Key Technologies Research for Impellers Machining Based on NX

2011 ◽  
Vol 101-102 ◽  
pp. 1031-1034
Author(s):  
Xian Yi Li ◽  
Jian Zhong Fu ◽  
Ji Qiang Li
Keyword(s):  
Tool Path ◽  
Cutting Tool ◽  
Milling Process ◽  
Tool Path Generation ◽  
Machining Accuracy ◽  
Post Processing ◽  
Nc Code ◽  
Nc Program ◽  
Key Technologies ◽  
Nc Machine

Tool path generation, post-processing and verification and simulation of NC program are key technologies which are investigated in this research for manufacturing impellers. Generation of tool path aims at producing the cutting tool path. Post-processing transforms the cutter location file (CLSF file) of the tool path to the NC code which NC machine can recognize. Verification and simulation of NC program aims at proving the accuracy of program, thus the interference and collision can be avoided. When tool path is planned, increasing the machining efficiency during the rough and semi-finish milling process is the main consideration. Increasing machining accuracy is an important consideration for final finish milling.

Synchronous Adjustment of Milling Tool Path Based on the Relative Deviation

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
Xiao-Jin Wan ◽  
Cai-Hua Xiong ◽  
Lin Hua
Keyword(s):  
Tool Path ◽  
Cutting Tool ◽  
Cnc Machining ◽  
Numerical Control ◽  
Machining Process ◽  
Machining Accuracy ◽  
Source File ◽  
Modern Computer ◽  
Adjustment Strategy ◽  
Machining System

In machining process, machining accuracy of part mainly depends on the position and orientation of the cutting tool with respect to the workpiece which is influenced by errors of machine tools and cutter-workpiece-fixture system. A systematic modeling method is presented to integrate the two types of error sources into the deviation of the cutting tool relative to the workpiece which determines the accuracy of the machining system. For the purpose of minimizing the machining error, an adjustment strategy of tool path is proposed on the basis of the generation principle of the cutter location source file (CLSF) in modern computer aided manufacturing (CAM) system by means of the prediction deviation, namely, the deviation of the cutting tool relative to the workpiece in computer numerical control (CNC) machining operation. The resulting errors are introduced as adjustment values to adjust the nominal tool path points from cutter location source file from commercial CAM system prior to machining. Finally, this paper demonstrates the effectiveness of the prediction model and the adjustment technique by two study cases.

The Optimization Design of Arm Bracket Structure Topology Based on ANSYS

2013 ◽  
Vol 834-836 ◽  
pp. 1464-1469
Author(s):  
Sheng Mei Luo ◽  
Zhao Yang Niu ◽  
Wei Liu ◽  
Fu Fang Luo ◽  
Jun Jun Jiang
Keyword(s):  
Topology Optimization ◽  
Optimization Design ◽  
Optimal Topology ◽  
Dimensional Model ◽  
Structure Topology ◽  
Change Mechanism ◽  
Machining Center ◽  
Automatic Tool Change ◽  
Automatic Tool ◽  
Ansys Workbench

The detail analysis proposal of the cylinder body is put forward for the automatic tool change mechanism of the QYJ-21 type horizontal machining center. It consists of three main aspects. Firstly, the dimensional model of the cylinders arm bracket portion will be created. Secondly, the topology optimization design of the arm bracket is implemented based on ANSYS Workbench. Finally, meeting the stiffness requirements, the optimal topology shape will be established, for it had the lightest weight.

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