PREDICTING CUTTING FORCES AT SUPER HIGH CUTTING SPEEDS FROM WORK MATERIAL PROPERTIES AND CUTTING CONDITIONS

1968 ◽  
pp. 247-258 ◽  
Author(s):  
R.G. FENTON ◽  
P.L.B. OXLEY
Keyword(s):  
Material Properties ◽  
Cutting Forces ◽  
Cutting Conditions ◽  
Work Material ◽  
Cutting Speeds

Mechanics of Orthogonal Machining: Predicting Chip Geometry and Cutting Forces from Work-Material Properties and Cutting Conditions

1969 ◽  
Vol 184 (1) ◽  
pp. 927-942 ◽  
Author(s):  
R. G. Fenton ◽  
P. L. B. Oxley
Keyword(s):  
Excellent Agreement ◽  
Material Properties ◽  
Cutting Forces ◽  
Contact Length ◽  
Experimental Results ◽  
Cutting Conditions ◽  
Orthogonal Machining ◽  
Work Material ◽  
Wide Range ◽  
Chip Geometry

A recently developed theory of orthogonal machining is used to calculate chip geometry (including tool-chip contact length) and cutting forces for SAE 1112 steel over a wide range of cutting conditions. A comparison with experimental results shows excellent agreement for most of the cutting conditions considered.

A machining theory for predicting chip geometry, cutting forces etc. from work material properties and cutting conditions

1980 ◽  
Vol 371 (1747) ◽  
pp. 569-587 ◽  
Keyword(s):  
Cutting Forces ◽  
High Speed ◽  
Cutting Speed ◽  
Carbon Steels ◽  
Cutting Conditions ◽  
Strain Rates ◽  
Compression Tests ◽  
Rate Dependent ◽  
Work Material ◽  
Flow Stress Data

An approximate machining theory is described in which account is taken of the temperature and strain-rate dependent properties of the work material. A feature of the theory is that the strain rates in the zones of intense plastic deformation in which the chip is formed and along the tool/ chip interface are determined as part of the solution. The theory is applied to make predictions for two plain carbon steels and a range of cutting conditions by using flow stress data obtained from high speed compression tests and excellent agreement is shown, for example, between predicted and experimental cutting forces. The values of tool/chip interface plastic zone thickness predicted by assuming a minimum work criterion are shown to agree well with experimental values, both experiment and theory indicating a marked decrease in thickness with increase in cutting speed. It is also shown how the temperatures and strain rates in this zone can be used to determine the conditions that cause a built-up edge to be formed on the cutting tool and good agreement is again shown with experimental results.

The Experimental Investigation of the Effects of Different Chip Breaker Forms on the Cutting Forces

2007 ◽  
Vol 23 ◽  
pp. 191-194 ◽  
Author(s):  
Huseyin Gürbüz ◽  
Adem Kurt ◽  
I. Korkut ◽  
Ulvi Şeker
Keyword(s):  
Experimental Investigation ◽  
Cutting Forces ◽  
Manufacturing Industry ◽  
Cutting Parameters ◽  
Cutting Conditions ◽  
Depth Of Cut ◽  
Test Results ◽  
Workpiece Material ◽  
Chip Breaker ◽  
Cutting Speeds

The objective of this paper is experimentally investigation of the effects of different chip breaker forms on the cutting forces according to various cutting parameters. AISI 1050 workpiece material, most used material in the manufacturing industry, and SNMG 120408R inserts and PSBNR 2525M12 tool holder have 75° approaching angle according to ISO 3685 are used in the experiments. Seven groups chip breaker form were used in the tests. The chip breaker forms are the coated inserts MA, SA, MS, GH and standard, and the uncoated inserts MS and standard. These inserts are Mitsubishi UC 6010 and UTI20T grade; correspond to ISO P30 and P15 grade, respectively. Machining tests were carried out by using five levels of cutting speeds (150, 200, 250, 300, 350 m/min), three levels of feed rate (0.15, 0.25, 0.35 mm/rev) and two levels of depth of cut (1.6, 2.5 mm). Cutting forces were measured using Kistler dynamometer. The test results show that the highest cutting force values were measured on SA, GH, MA forms, respectively. Complex chip breaker forms cause the increase of the cutting forces. Although the cutting forces on the uncoated inserts were partly small in light cutting conditions, it has increased on the uncoated inserts in heavy cutting conditions compared to coated inserts.

Mechanics of Oblique Machining: Predicting Chip Geometry and Cutting Forces from Work Material Properties and Cutting Conditions

1972 ◽  
Vol 186 (1) ◽  
pp. 813-820 ◽  
Author(s):  
G. C. I. Lin ◽  
P. L. B. Oxley
Keyword(s):  
Plastic Deformation ◽  
Flow Stress ◽  
Material Properties ◽  
Cutting Conditions ◽  
Approximate Theory ◽  
Plane Normal ◽  
Orthogonal Machining ◽  
Work Material ◽  
Chip Flow ◽  
Chip Geometry

An approximate theory of oblique machining is obtained by assuming that the plastic deformation in the plane normal to the cutting edge is equivalent to the flow in orthogonal machining. Equations are derived from which the chip geometry, including the direction of chip flow, and the three components of cutting force can be calculated for given cutting conditions and material properties. Results of machining tests are used to calculate the flow stress properties of the work material which are then used with the oblique machining theory to predict forces etc. Predicted and experimental results are shown.

Influence of Work Material Properties on Residual Stresses and Work Hardening Induced by Machining

2006 ◽  
Vol 524-525 ◽  
pp. 575-580 ◽  
Author(s):  
J.C. Outeiro ◽  
A. Morão Dias
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Material Properties ◽  
Work Hardening ◽  
Cutting Forces ◽  
Great Influence ◽  
Machining Process ◽  
Work Material ◽  
316L Steel ◽  
1045 Steel

Machining residual stresses are considered as part of surface integrity and a consequence of the machining process. Theses stresses are closely correlated with the corresponding process parameters, including the work material properties. As it is well known, not only the mechanical but also the physical properties of the work materials have great influence on machining residual stress. This was demonstrated in the present work through studying the residual stress and work hardening induced by the turning of AISI 316L and AISI 1045 steels. The residual stresses were determined at the workpiece surface and in-depth using the X-ray diffraction technique. To understand the influence of the work material properties on the residual stress and work hardening distributions, the mechanical and thermal phenomena occurring during the cutting process were studied, using a t developed experimental procedure. The experimental setup included a piezoelectric dynamometer to determine the cutting forces, and thermal imaging equipment developed to assess the temperature distribution in the deformation zone in turning. The results showed that the cutting forces and temperatures in the machining of 316L steel are much higher than those in the machining of 1045 steel. Thus, machining 316L steel, when compared to 1045 steel, results in higher superficial residual stresses and stronger in-depth residual stress gradients, higher superficial work-hardening and greater thickness of the work hardened layer.

Prediction of Cutting Forces and Built-Up Edge Formation Conditions in Machining With Oblique Nose Radius Tools

1996 ◽  
Vol 210 (5) ◽  
pp. 457-469 ◽  
Author(s):  
J A Arsecularatne ◽  
R F Fowle ◽  
P Mathew ◽  
P L B Oxley
Keyword(s):  
Thermal Properties ◽  
Cutting Forces ◽  
Material Flow ◽  
Cutting Conditions ◽  
Nose Radius ◽  
Tool Geometries ◽  
Formation Conditions ◽  
Semi Empirical ◽  
Cutting Speeds ◽  
Good Agreement

A semi-empirical machining theory is described for predicting cutting forces and temperatures for oblique nose radius tools from cutting conditions and a knowledge of work material flow stress and thermal properties. Predictions are made for a range of cutting speeds and tool geometries. It is shown how the cutting conditions giving a built-up edge can be determined from the predicted cutting temperatures. A comparison between predicted and experimental results shows good agreement.

Analysis of Cutting Forces and Machining Error in Ball End Milling of Cylindrical Surfaces

2011 ◽  
Vol 328-330 ◽  
pp. 560-564
Author(s):  
Ba Sheng Ouyang ◽  
Guo Xiang Lin ◽  
Yong Hui Tang
Keyword(s):  
Cutting Forces ◽  
End Milling ◽  
Cutting Conditions ◽  
Machining Error ◽  
Machined Surface ◽  
Convex Surfaces ◽  
Machining Errors ◽  
End Mills ◽  
Tool Deflections ◽  
Cutting Modes

Cutting forces and machining error in contouring of concave and convex surfaces using helical ball end mills are theoretically investigated. The cutting forces are evaluated based on the theory of oblique cutting. The machining errors resulting from the tool deflections due to these forces are evaluated at various points of the machined surface. The influence of various cutting conditions and cutting modes on machining error is investigated and discussed.

Sign in / Sign up

Export Citation Format

Share Document