A machine operator dies after becoming caught in a computer numerical controlled vertical milling machine - Massachusetts.

2008 ◽  
Keyword(s):  
Milling Machine ◽  
Vertical Milling ◽  
Vertical Milling Machine ◽  
Machine Operator

Mathematical Approach for Geometric Error Modeling of Three Axis CNC Vertical Milling Machine

2016 ◽  
Vol 842 ◽  
pp. 303-310 ◽  
Author(s):  
Widyanti Kwintarini ◽  
Agung Wibowo ◽  
Yatna Yuwana Martawirya
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Machining Process ◽  
Cnc Machine Tools ◽  
Milling Machine ◽  
Cnc Machine ◽  
Geometrical Errors ◽  
Vertical Milling ◽  
Vertical Milling Machine ◽  
Accuracy And Repeatability

The aim of this paper overviews about to find out the errors that come from three axis CNC vertical milling machine. The errors come from, the CNC milling machine can be modelled into mathematical models and later on these error models will be used to analyse the errors in the measured data. Many errors from CNC machine tools have given significant effects toward the accuracy and repeatability of manufacturing process. There are two error sources come from CNC machine tools such as tool deflection and thermal distortions of machine tool structure. These errors later on will contribute to result in the geometrical deviations of moving axis in CNC vertical milling machine. Geometrical deviations of moving axis such as linear positioning errors, roll, pitch and yaw can be designated as volumetric errors in three axis machine tool. Geometrical deviations of moving axises happen at every axis in three axis CNC vertical milling machine. Geometrical deviations of moving axises in linear and angular movement has the amount of errors up to twenty one errors. Moreover, this geometrical errors play the major role in the total amount of errors and for that particular reason extra attention towards the geometrical deviation errors will be needed along machining process. Each of geometrical error of three axes vertical machining center is modeled using a homogeneous transformation matrix (HTM). The developed mathematical model is used to calculate geometrical errors at each axis and to predict the resultant error vector at the interface of machine tool and workpiece for error compensation.

scholarly journals Study of Deformations Field in the Working Zone of Vertical Milling Machine

2017 ◽  
Vol 206 ◽  
pp. 1069-1074 ◽  
Author(s):  
R.M. Khusainov ◽  
A.R. Sabirov ◽  
I.I. Mubarakshin
Keyword(s):  
Milling Machine ◽  
Working Zone ◽  
Vertical Milling ◽  
Vertical Milling Machine

DEVICE FOR HONING PLANES WEDGES VALVES ARTILLERY SYSTEMS

2020 ◽  
pp. 37-42
Author(s):  
V. A. Bahvalov
Keyword(s):  
Metal Removal ◽  
High Strength ◽  
Gear Ratio ◽  
Work Piece ◽  
Milling Machine ◽  
Machined Surface ◽  
Vertical Milling ◽  
Milling Machines ◽  
Vertical Milling Machine ◽  
Kinematic Diagram

The article describes the process of honing the details of command artillery systems, in particular the process of honing planes wedge gate of medium-caliber guns. The article is an analysis of the kinematic scheme of the device and the selected gear ratio device that provides even wear a uniform honing stones and metal removal with a flat machined surface of the work piece due to the commission of the cutting grains honing stones complex movements in the horizontal plane. Next each of the cutting grains will not be repeated for the entire processing cycle. Kinematic diagram of the device with the established and enshrined in the radial grooves of the disc honing stones is implemented in the design and manufacture of devices for honing on vertical milling machines planes wedge gate artillery systems. Investigation of the process of honing the flat specimens made of high-strength gun steels viscous with plan dimensions 130x240 mm possible to determine the rational parameters of flat honing process.Production testing device for honing planes wedge gate of one of the artillery pieces on a vertical milling machine performed at one of the engineering confirmed the efficiency of the device for a flat honing. Honing wedge planes shutter serial products (76 mm caliber gun) on a vertical milling machine using the apparatus discussed in the article improves the processing performance in comparison with conventional processing means 20…35 %. In this case, stability is regulated product design documentation form accuracy and size of the part and the surface roughness of the planes of the wedge gate Ra £ 0,32 microns.

Research on the Information Extraction of the Whole Machine Simple Model and Characteristics Reproduction

2010 ◽  
Vol 34-35 ◽  
pp. 1052-1057
Author(s):  
Qing Fu Wang ◽  
Hong Lin Zhao ◽  
Zhi Heng Wu ◽  
Guang Peng Zhang ◽  
Dong Hui Mu ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Dynamic Characteristics ◽  
Data File ◽  
Simplified Model ◽  
Milling Machine ◽  
Machine Model ◽  
Static And Dynamic Characteristics ◽  
Vertical Milling ◽  
Vertical Milling Machine ◽  
Machine Structure

The static and dynamic characteristics calculating of the whole machine structure by finite element method lead to dense grid nodes, which is not conducive to rapid quantitative analysis. Therefore, a simplified model and the corresponding static and dynamic characteristics are needed. This paper presents a simplified model using key nodes kept principle and a corresponding software which reads data from resulting data file, extracts information such as coordinates, static and dynamic displacement of relevant nodes from reading data and draws simplified models of the whole machine structure and static and dynamic deformation of it. Take XK173 Vertical Milling Machine as the case research object, establish a complete machine model, analyze the static and dynamic characteristics and reproduce that using simplified model by software. The result shows that the Vertical Milling Machine nodes are reduced from the original 153 238 nodes to156 nodes. It well preserves machine structure and static and dynamic characteristics, and lays foundations for simplifying follow-up quantitative analysis.

scholarly journals Influence of Tool Pin Profile and Tool Rotating Speed on Mechanical Properties of Al6082 Alloy

2019 ◽  
Vol 8 (12) ◽  
pp. 3342-3345
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Welding Process ◽  
Automatic Process ◽  
Work Piece ◽  
Milling Machine ◽  
Friction Stir ◽  
Vertical Milling ◽  
Vertical Milling Machine ◽  
Tool Pin

Friction stir welding is a solid state welding which uses non consumable welding tool. It is an automatic process which generally performs on the vertical milling machine. In this type of welding, the relative motion between the tools and work piece creates heat which uses the region of work piece to be welded get softened and to joint the two work pieces. Friction stir welding process is more reliable for the materials which are generally non heat treatable. In this present investigation it will observe that how the rotational speeds of the tool and different shapes of the tool pins effects the mechanical properties of the aluminium alloy 6082. For this purpose three tools with different profiles, i.e triangular, cylindrical and square was designed and fabricated. At three different rotational speeds of 560 rpm, 900 rpm, 1800 rpm work pieces are joined using vertical milling machine. Specimens are prepared and tested for mechanical properties, tensile, impact, and hardness tests are performed and to detect the defects and voids x-ray test performed on the weld joints. And it was observed that highest tensile strength was presented when the square pin tool used at 560 rpm. The rotational speed increased mechanical properties are reducing significantly.

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