The Compensation for Deviation by Means of Micro-Computer in NC Milling Machines

1986 ◽  
pp. 103-105
Author(s):  
C. Li ◽  
Q. Zhu ◽  
Y. Wu
Keyword(s):  
Milling Machines ◽  
Nc Milling

scholarly journals Complex surface finishing control on NC milling machines

2018 ◽  
Vol 2018 (4) ◽  
pp. 29-37
Author(s):  
Александр Козлов ◽  
Aleksandr Kozlov ◽  
Геннадий Малютин ◽  
Genadyi Malyutin
Keyword(s):  
Contact Area ◽  
Cutting Forces ◽  
Ball Mill ◽  
Complex Surface ◽  
Surface Finishing ◽  
Technological Parameters ◽  
Milling Machines ◽  
Nc Milling

On the basis of the analysis of cutting forces operating in the contact area of a ball mill with the surface under machining there are offered dependences for the technological parameters definition. The use of the dependences obtained allows increasing productivity of volumetric milling areas left unprocessed after semifinish milling without use of additional adaptive devices

A New Method of Point-to-Point Comparison Interpolation for Involute

2013 ◽  
Vol 589-590 ◽  
pp. 708-711
Author(s):  
Kai Yin Yan ◽  
Jing Ping Wang ◽  
Ru Zhong Zhou
Keyword(s):  
Interpolation Method ◽  
Slight Modification ◽  
Comparison Method ◽  
Numerical Control ◽  
Incremental Algorithm ◽  
Polar Coordinate System ◽  
Milling Machines ◽  
Polar Coordinate ◽  
Nc Milling ◽  
Point To Point

This paper presents a new interpolation method for involute in polar coordinate system based on pulse incremental algorithm and point to point comparison method. The new idea is that the diameter deviation of the base circle at any interpolation point is calculated and introduced to be a criterion to determine the feeding direction of next step. Consequently, the interpolation computing becomes very simple and high contour accuracy can be obtained. With slight modification of numerical control (NC) system, this method can be realized on NC milling machines equipped with two simultaneous movement axes. A case study has shown that this method is feasible and effective.

The Research of Automatic Measuring System on Stone Milling Force

2009 ◽  
Vol 16-19 ◽  
pp. 1005-1009
Author(s):  
Feng Lian Qi ◽  
Zhi Li Sun ◽  
Min Zhao
Keyword(s):  
Automatic Measurement ◽  
Mathematic Model ◽  
Measuring System ◽  
Vertical Force ◽  
Automatic Measuring ◽  
Milling Force ◽  
Milling Machines ◽  
Nc Milling ◽  
Measuring Force

The automatic measuring system of stone milling force is studied in the article. The columned diamond milling cutters are used to mill stone on NC milling machines. Through analyzing the milling force, the mathematic model is established. Combining the measuring force index, the experimental facility of the automatic measuring system is established and solving methods of the key problems on the software data acquisition is detailed. The system is utilized to measure three component force of milling, that is, horizontal force, vertical force and axial force. Reliable data is acquired. Finally the automatic acquisition of data and the drawing of curve are realized. The achievement of automatic measurement of stone milling force provides theory basis for the further research on the wearing characteristics of diamond cutters, cutting quality of stones and the optimizing of processing technological parameter etc.

Manufacture of High Precision Spur Gears With End Milling Cutters

1988 ◽  
Vol 110 (4) ◽  
pp. 359-366 ◽  
Author(s):  
S. G. Papaioannou
Keyword(s):  
Design Process ◽  
High Precision ◽  
End Milling ◽  
Spur Gears ◽  
Interpolation Algorithm ◽  
Simple Geometry ◽  
Milling Machines ◽  
Nc Milling ◽  
Center Path ◽  
Gear Profile

A new method is proposed for cutting large module spur gears on NC milling machines, using end milling cutters. End milling eliminates undercutting and leads to a significant reduction of tooling costs. The method relies on the motion of a simple geometry tool rather than the shape of an expensive form tool to generate the gear profile. The tool center path is defined and computed for the standard 20 deg full-depth system. Tool steps are generated by a highly precise interpolation algorithm. The practical aspects of the method are also investigated to establish its feasibility. The computation of the maximum tool size shows that sufficient tool rigidity can be secured for gear modules greater than or equal to 10 mm. The Lewis equation is used to investigate the beam strength of the resulting tooth profile and generate data for the design process. Gears made by end milling are shown to be comparable in strength to those produced by shaping or hobbing.

Machining of NURBS Surfaces Using Three-Axis NC Milling Machine

2013 ◽  
Vol 376 ◽  
pp. 417-422
Author(s):  
Syh Shiuh Yeh ◽  
Wan Chu Chen ◽  
Jin Tsu Sun
Keyword(s):  
Cutting Tool ◽  
Compensation Method ◽  
Nurbs Surface ◽  
Surface Machining ◽  
Surface Interpolation ◽  
Machining Center ◽  
Milling Machines ◽  
Nc Milling ◽  
Machining Test ◽  
Tool Compensation

Three-axis NC milling machines must carefully consider the surface interpolation algorithm and the cutting tool compensation method to achieve precise NURBS surface machining results. This study thus analyzed NURBS surface functions and developed a tool compensation method to efficiently compensate for the radius and length offsets of the cutting tool used for NURBS surface machining. A NURBS surface machining test performed on a vertical machining center further validates the proposed approaches.

scholarly journals Tool path calculation at inner surface milling on NC machines

2018 ◽  
Vol 2018 (1) ◽  
pp. 36-40 ◽  
Author(s):  
Александр Козлов ◽  
Aleksandr Kozlov ◽  
Геннадий Малютин ◽  
Genadyi Malyutin
Keyword(s):  
Tool Path ◽  
New Method ◽  
Layer By Layer ◽  
Reuleaux Triangle ◽  
Feed Drives ◽  
Inner Surface ◽  
Milling Machines ◽  
Nc Milling ◽  
Complex Parts ◽  
Path Calculation

Modern NC milling machines allow manufacturing complex parts. One of the urgent problems at concave surface milling is rib rounding in the corners connected with the radius of the tool used. The existed methods for rounded rib updating are inefficient. For this reason there is a necessity in the development of a new method for angle formation in concave surfaces with the aid of layer-by-layer milling based on the principle of square rolling by Reuleaux triangle. In the paper presented there is offered a procedure for the calculation of a tool path at the agreed motion of feed drives and a spindle for the finish milling of concave surfaces with small rib rounding in the corners.

Comparison of ultra high resolution immersion lens CFESEM and TEM for imaging of semiconductor devices

1990 ◽  
Vol 48 (4) ◽  
pp. 622-623
Author(s):  
Terrence Reilly ◽  
Al Pelillo ◽  
Barbara Miner
Keyword(s):  
High Resolution ◽  
Sample Preparation ◽  
Cross Sections ◽  
Semiconductor Devices ◽  
Ion Milling ◽  
Observation Area ◽  
Transmission Electron ◽  
Milling Machines ◽  
Resolution Imaging ◽  
Electron Microscopes

The use of transmission electron microscopes (TEM) has proven to be very valuable in the observation of semiconductor devices. The need for high resolution imaging becomes more important as the devices become smaller and more complex. However, the sample preparation for TEM observation of semiconductor devices have generally proven to be complex and time consuming. The use of ion milling machines usually require a certain degree of expertise and allow a very limited viewing area. Recently, the use of an ultra high resolution "immersion lens" cold cathode field emission scanning electron microscope (CFESEM) has proven to be very useful in the observation of semiconductor devices. Particularly at low accelerating voltages where compositional contrast is increased. The Hitachi S-900 has provided comparable resolution to a 300kV TEM on semiconductor cross sections. Using the CFESEM to supplement work currently being done with high voltage TEMs provides many advantages: sample preparation time is greatly reduced and the observation area has also been increased to 7mm. The larger viewing area provides the operator a much greater area to search for a particular feature of interest. More samples can be imaged on the CFESEM, leaving the TEM for analyses requiring diffraction work and/or detecting the nature of the crystallinity.

PERBAIKAN TATA LETAK LANTAI PRODUKSI INDUSTRI MEBEL MENGGUNAKAN METODE GRAFIK DAN ALGORITMA CRAFT

2020 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Kuswanto Kuswanto ◽  
Juan Junius ◽  
Anita Christine Sembiring
Keyword(s):  
Operating System ◽  
Material Handling ◽  
Facility Layout ◽  
Integrated Planning ◽  
Furniture Manufacturing ◽  
Milling Machines ◽  
Material Handling Costs ◽  
The Cost ◽  
A Company ◽  
Research Show

Facility layout is integrated planning of the flow of a product in an operating system to obtain the most effective and efficient interrelation between workers, materials, machinery, and equipment as well as handling and transferring materials. A company engaged in furniture manufacturing has a problem in its production process, namely, the distance between machines is too far so that it affects the cost of handling materials. Distant workstations are found on profile machines, milling machines, measuring machines, cutting machines. Therefore, improvements must be made to the layout of facilities on the production floor so that facility layout is efficient and material handling costs are reduced. The problem-solving approach used is the Graph Method and CRAFT Algorithm. The results of the research show that material handling costs are reduced by 7.58% or Rp. 17,765 using the CRAFT algorithm.

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