Some analysis into 0.18%-C steel work piece undergone through turning operation by using HSS [KT-8 (M42)] single point tool

2019 ◽  
Author(s):  
Saurabh Dewangan ◽  
Ashutosh Pattnayak ◽  
R. Abhishek ◽  
Niranjan Patel
Keyword(s):  
Single Point ◽  
Work Piece ◽  
Turning Operation ◽  
Steel Work

scholarly journals A recommendation of computation of normal streeses in single point incremental forming technology

2014 ◽  
Vol 17 (1) ◽  
pp. 21-28
Author(s):  
Dien Khanh Le ◽  
Nam Thanh Nguyen ◽  
Binh Thien Nguyen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Incremental Forming ◽  
Single Point ◽  
Finite Element Method Simulation ◽  
Recent Decade ◽  
Work Piece ◽  
Single Point Incremental Forming ◽  
Forming Technology ◽  
Element Method

Single Point Incremental Forming (SPIF) has become popular for metal sheet forming technology in industry in many advanced countries. In the recent decade, there were lots of related studies that have concentrated on this new technology by Finite Element Method as well as by empirical practice. There have had very rare studies by pure analytical theory and almost all these researches were based on the formula of ISEKI. However, we consider that this formula does not reflect yet the mechanics of destruction of the sheet work piece as well as the behavior of the sheet in reality. The main aim of this paper is to examine ISEKI’s formula and to suggest a new analytical computation of three elements of stresses at any random point on the sheet work piece. The suggested formula is carefully verified by the results of Finite Element Method simulation.

Principle and Simulation Study on Multi Point-Single Point Incremental Combined Forming for Sheet Metal

2009 ◽  
Vol 626-627 ◽  
pp. 273-278 ◽  
Author(s):  
X.J. Li ◽  
Ming Zhe Li ◽  
C.G. Liu ◽  
Zhong Yr Cai
Keyword(s):  
Sheet Metal ◽  
Single Point ◽  
Experimental Result ◽  
Work Piece ◽  
The Novel ◽  
Forming Process ◽  
Explicit Finite Element ◽  
Forming Defect ◽  
Forming Technology ◽  
Elastic Cushion

Based on Multi-Point (MP) forming technology and Single-Point Incremental (SPI) forming technology, MP-SPI combined forming method for sheet metal is proposed, the principle and two different forming techniques are illustrated firstly. Then the paper is focused on numerical analysis for the novel forming technique with explicit Finite Element (FE) algorithm. During simulation of spherical work-piece, dimpling occurs as a main forming defect in MP-SPI combined forming process. Simulation results show that the dimpling defect can be suppressed effectively by using elastic cushion. An appropriate thickness of elastic cushion is necessary to prevent dimpling. And also the deformation of the work-piece is sensitive to the shape of elastic cushion. The combined forming test shows that the numerical simulation result is closed to the experimental result.

A Study on Using Cover Blank in Single Point Incremental Forming Process by Finite Element Analysis

2015 ◽  
Vol 809-810 ◽  
pp. 277-282
Author(s):  
Khalil Ibrahim Abass
Keyword(s):  
Tool Path ◽  
Incremental Forming ◽  
Sheet Material ◽  
Single Point ◽  
Complex Nature ◽  
Work Piece ◽  
Process Conditions ◽  
Single Point Incremental Forming ◽  
Forming Process ◽  
Highly Nonlinear

The Single Point Incremental Forming Process (SPIF) is a forming technique of sheet material based on layered manufacturing principles. The forming tool is moved along the tool path while the edges of sheet material are clamped. The finished part is manufactured by the CNC machine. SPIF involves extensive plastic deformation and the description of the process is more complicated by highly nonlinear boundary conditions, namely contact and frictional effects have been accomplished. However, due to the complex nature of these models, numerical approaches dominated by the FEA are now in widespread use. The paper presents the data and main results of a study on effect of using cover blank in SPIF through FEA. The considered SPIF has been studied under certain process conditions referring to the test work piece, tool, etc., applying ANSYS 11.0. The results show that the simulation model can predict an ideal profile of processing track, spring back error of SPIF, the behavior of contact tool-work piece, the product accuracy by evaluation its thickness and strain distributions, the contact status and chattering among surface interface tool-work piece.

Precision Milling of Hardened Steel with CBN Tools

2013 ◽  
Vol 581 ◽  
pp. 182-187 ◽  
Author(s):  
Andrzej Matras ◽  
Wojciech Zębala ◽  
Robert Kowalczyk
Keyword(s):  
Surface Roughness ◽  
Free Surface ◽  
Inclination Angle ◽  
Spherical Surface ◽  
Hardened Steel ◽  
Work Piece ◽  
Steel Work ◽  
Cutting Surface ◽  
Milling Tool ◽  
Roughness Measurements

The paper presents research of milling tool inclination angle δ influence (in relation to the cutting surface) on the free surface roughness. Rotational tools with curved cutting edges (ball nose cutter) performed translation movements on the spherical surface of hardened steel work piece (hardness of 50, 62 and 65 HRC). Milling tool with diameter d=1 mm was made of CBN. Roughness measurements were performed in different places of the milling surface with the Taylor Hobson profilometer.

scholarly journals Modelling of Induction Heating of Steel Work Piece for Forging of Crankshaft

2018 ◽  
Vol 24 (3) ◽  
Author(s):  
Rasa KANDROTAITĖ JANUTIENĖ ◽  
Darius MAŽEIKA
Keyword(s):  
Induction Heating ◽  
Work Piece ◽  
Steel Work

Experimental Verification of a Stability Theory for Periodic Cutting Operations

1993 ◽  
Vol 115 (1) ◽  
pp. 9-14 ◽  
Author(s):  
I. Minis ◽  
A. Tembo
Keyword(s):  
Stability Theory ◽  
Degrees Of Freedom ◽  
Transfer Functions ◽  
Single Point ◽  
Depth Of Cut ◽  
Work Piece ◽  
Theoretical Predictions ◽  
Critical Depth Of Cut ◽  
Linear Differential ◽  
The Stability

The stability of periodic cutting operations, the dynamics of which are described by linear differential-difference equations with periodic coefficients, is studied. A new stability theory that uses parametric transfer functions and Fourier analysis to obtain the characteristic equation of such systems is experimentally verified. The theory is applied to single-point turning of a compliant work piece with two degrees-of-freedom. The theoretical predictions of both the critical depth of cut for chatter-free turning and the corresponding chatter frequency were found to be in good agreement with the measurements obtained from actual chatter tests under various surface speeds.

scholarly journals Die Design of Flexible Multi-Point Forming Process

2019 ◽  
Vol 14 (2) ◽  
pp. 22-29
Author(s):  
Tahseen Fadhel Abaas ◽  
Karem Mohsen Younis ◽  
Khalida Kadhim Mansor
Keyword(s):  
Incremental Forming ◽  
Single Point ◽  
Setting Time ◽  
Die Design ◽  
Work Piece ◽  
Shape Error ◽  
Forming Process ◽  
Blank Holder ◽  
Flexible Manufacture ◽  
Minimum Force

Multi-point forming (MPF) is an advanced flexible manufacture technology, and the technology results from the idea that the whole die is separated into small punches that can be adjusted height. This idea is applied to the traditional rigid blank-holder, so flexible blank-holder (FBH) idea can be obtained. In this work, the performance of a multi-point die is investigated with pins in square matrix and suitable blank holder. Each pin in the punch holder can be a significant moved according to the die high and at different load that applied with spring with respect to spring stiffness. The results shows the reduction in setting time with respect to traditional single point incremental forming process that lead to (90%). and also show during the forming process, the deformation of the interpolator can induce a shape error in the formed work-piece and the blank holder can reduce/eliminate dimples that sometimes arise in the work-piece. The minimum force applied using multi-point die is 28.556KN, while the load when complete the forming process is 30.8KN that caused displacement of die to 32.8mm.

Experimental thermal analysis and modelling of single point lathe cutting tools without cooling effect

2018 ◽  
Vol 7 (2) ◽  
pp. 276
Author(s):  
A. Agarwal ◽  
M.T Letsatsi ◽  
O.M. Seretse ◽  
R. Marumo
Keyword(s):  
Mild Steel ◽  
Feed Rate ◽  
High Speed ◽  
Single Point ◽  
Cutting Tools ◽  
Tool Material ◽  
High Speed Steel ◽  
Work Piece ◽  
Comparison Of Experiments ◽  
Tungsten Carbide Tool

This study investigated the use of tungsten carbide tool and high speed steel (HSS) tool when machining aluminum and mild steel. The parameters such as feed and speed of rotation were varied in order to observe their effect on machining operation. The experiments were performed without a coolant. FLIR thermo Cam P60 and Infra-Red Camera were used to record the observations. The highest temperature were recorded when feed rate was 2 mm. A comparison of experiments shows that HSS tooling produced high temperatures when machining mild steel. At 625 rev/min HSS failed when cutting mild steel at 2 mm feed rate. It was generally observed that temperatures generated between a tool and work piece is a function of feed rate, speed of rotation and tool material. These observations can aid the selection of a tool before a machining operation.

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