A Proposal of Process Strategy for Micro-Cutting Edge Fabrication: Effects of Shape Formation after Laser Hardening

This paper proposes a novel process strategy for micro-cutting edge fabrication. Micro-cutting edges need a hardening process for the ridgeline parts that requires abrasive resistance, as well as edge sharpness and shape accuracy, based on their applications. Micro-cutting edge shapes also vary greatly in ridgeline profile and section. The proposed method is shape fabrication after laser hardening, which easily addresses these issues. In the present paper, effects of the proposed method are discussed and the results of a demonstration test are introduced.

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Shape formation after laser hardening for high-precision micro-cutting edge

Advances in Materials and Processing Technologies ◽

10.1080/2374068x.2020.1860590 ◽

2020 ◽

pp. 1-8

Author(s):

Keiji Ogawa ◽

Hirotaka Tanabe ◽

Heisaburo Nakagawa ◽

Mitsuhiro Goto

Keyword(s):

High Precision ◽

Cutting Edge ◽

Laser Hardening ◽

Micro Cutting ◽

Shape Formation

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On-Machine Heat Treatment System Using YAG Laser: Laser Hardening of Micro-Cutting Edge

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.447-448.203 ◽

2010 ◽

Vol 447-448 ◽

pp. 203-207 ◽

Cited By ~ 4

Author(s):

Keiji Ogawa ◽

Heisaburo Nakagawa ◽

Akira Ohtsuka

Keyword(s):

Heat Treatment ◽

Machine Tool ◽

Laser Irradiation ◽

Cutting Edge ◽

Laser Hardening ◽

Treatment System ◽

Yag Laser ◽

Micro Cutting ◽

Laser Quenching ◽

Machining Center

This paper describes the laser hardening of micro-cutting edges using an on-machine heat treatment system with a YAG laser. Various laser conditions were evaluated to perform laser quenching on a machine tool without melting at the edges. We also investigated the influence of the motion accuracy of the machining center on the quenching characteristic of micro-cutting edges after laser irradiation. We clarified that we could quench both the straight and curved corner parts by arranging proper laser irradiation conditions considering the motion accuracy of the machining center.

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Time-dependent 3D modeling of the thermal analysis of the high-power diode laser hardening process

Optics & Laser Technology ◽

10.1016/j.optlastec.2020.106216 ◽

2020 ◽

Vol 128 ◽

pp. 106216 ◽

Cited By ~ 1

Author(s):

Saeed Talesh Alikhani ◽

Mohammad Kazemi Zahabi ◽

Mohammad Javad Torkamany ◽

Seyed Hasan Nabavi

Keyword(s):

Thermal Analysis ◽

Diode Laser ◽

High Power ◽

3D Modeling ◽

Laser Hardening ◽

Time Dependent ◽

Hardening Process ◽

Power Diode ◽

High Power Diode Laser

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Investigation on Mechanism of Ultra-Smoothed Surface with a Micro Slot on the Flank Face in Micro Cutting

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.651-653.764 ◽

2014 ◽

Vol 651-653 ◽

pp. 764-767

Author(s):

Tao Zhang ◽

Hou Jun Qi ◽

Gen Li

Keyword(s):

Surface Roughness ◽

Chip Thickness ◽

Cutting Edge ◽

Back Side ◽

Uncut Chip Thickness ◽

Micro Cutting ◽

Cutting Edge Radius ◽

Edge Radius ◽

Flank Face ◽

Side Flow

Micro cutting is a promising manufacturing method to obtain good surface integrity. Surface roughness shows size effect when the uncut chip thickness is smaller than the cutting edge radius. A special micro slot on the flank face of cutting tools was manufactured with discharge. Two groups of micro orthogonal cutting were conducted. The surface roughness of machined surface was measured and compared to each other. The results show that surface roughness decreases first and then increases with the ratio of uncut chip thickness to cutting edge radius. The surface machined with micro slot is better than that of without micro slot due to the micro slot restrain the back side flow of work piece based on the finite element model.

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Stress Analysis on the Cutting Edge Based on Design of Micro-Cutting Tool

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.589-590.395 ◽

2013 ◽

Vol 589-590 ◽

pp. 395-398

Author(s):

Fang Jiang ◽

Xi Bin Wang ◽

Zhi Bing Liu ◽

Huai Ming Wang

Keyword(s):

Stress Analysis ◽

Cutting Tool ◽

Extreme Value ◽

Tool Design ◽

Cutting Edge ◽

Micro Cutting ◽

Blunt Edge ◽

Edge Based ◽

Cutting Tool Design

Stress analysis on wedge zone is an important step for micro-cutting tool design. The effect of stress borne by the cutting tool upon the radius of its blunt edge was analyzed, when the tool machines with minimum cutting thickness which is confined within 10-4-10-2mm. It shows that the minimal extreme value of the radius of blunt edge is existed in the process of micro-cutting tool design.

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Surface Hardening of AISI 420 Stainless Steel by Using a Nanosecond Pulse Laser

Materials Science Forum ◽

10.4028/www.scientific.net/msf.911.44 ◽

2018 ◽

Vol 911 ◽

pp. 44-48 ◽

Cited By ~ 6

Author(s):

Ornsurang Netprasert ◽

Viboon Tangwarodomnukun ◽

Chaiya Dumkum

Keyword(s):

Stainless Steel ◽

Pulse Laser ◽

Laser Power ◽

Nanosecond Pulse ◽

Laser Hardening ◽

Micro Hardness ◽

Hardening Process ◽

Aisi 420 ◽

Scan Speed ◽

Nanosecond Pulse Laser

Unlike the conventional heat treatments, laser hardening process can selectively and locally harden the workpiece surface with minimum part distortion, thus making the process suitable for small or thin workpieces. To elucidate a better understanding of process performance, this paper presents an investigation of laser hardening process for AISI 420 martensitic stainless steel. A nanosecond pulse laser was used as a heat source to harden the metal surface. The effects of laser power scan overlap and scan speed on micro-hardness and case depth were experimentally examined. The results revealed that the micro-hardness of stainless steel surface increased from 242 HV to 1700 HV without any sign of surface melting. The depth of hardened layer was found to be 60-80 µm depending on laser power, scan speed and scan overlap applied. In addition, the scan overlap of 50% was recommended to lessen the deviation of micro-hardness across the laser-scanned area.

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Influence of Reground Tool Sharpness on Micro-Cutting Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.37-38.550 ◽

2010 ◽

Vol 37-38 ◽

pp. 550-553

Author(s):

Xin Li Tian ◽

Zhao Li ◽

Xiu Jian Tang ◽

Fang Guo ◽

Ai Bing Yu

Keyword(s):

Cutting Forces ◽

Orthogonal Cutting ◽

Cutting Tools ◽

Chip Thickness ◽

Cutting Edge ◽

Cutting Process ◽

Micro Cutting ◽

Temperature Distributions ◽

Edge Radius ◽

1045 Steel

Tool edge radius has obvious influences on micro-cutting process. It considers the ratio of the cutting edge radius and the uncut chip thickness as the relative tool sharpness (RST). FEM simulations of orthogonal cutting processes were studied with dynamics explicit ALE method. AISI 1045 steel was chosen for workpiece, and cemented carbide was chosen for cutting tool. Sixteen cutting edges with different RTS values were chosen for analysis. Cutting forces and temperature distributions were calculated for carbide cutting tools with these RTS values. Cutting edge with a small RTS obtains large cutting forces. Ploughing force tend to sharply increase when the RTS of the cutting edge is small. Cutting edge with a reasonable RTS reduces the heat generation and presents reasonable temperature distributions, which is beneficial to cutting life. The force and temperature distributions demonstrate that there is a reasonable RTS range for the cutting edge.

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