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

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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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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Visual high-precision detection method for tool damage based on visual feature migration and cutting edge reconstruction

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-021-06919-5 ◽

2021 ◽

Author(s):

Zukun Ye ◽

Yulun Wu ◽

Guocai Ma ◽

Heng Li ◽

Zhijuan Cai ◽

...

Keyword(s):

High Precision ◽

Detection Method ◽

Cutting Edge ◽

Visual Feature ◽

Edge Reconstruction ◽

Tool Damage

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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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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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Development of high precision grinding technology for irregularly shaped cutting edge of punch

The Proceedings of The Manufacturing & Machine Tool Conference ◽

10.1299/jsmemmt.2019.13.c24 ◽

2019 ◽

Vol 2019.13 (0) ◽

pp. C24

Author(s):

Keitaro SHIGEMURA ◽

Hiroaki YAMADA ◽

Jun’ichi KANEKO ◽

Takeyuki ABE ◽

Kenichiro HORIO

Keyword(s):

High Precision ◽

Cutting Edge ◽

Precision Grinding

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Determination of Rational Design and Geometric Parameters of a High-Performance Drill Based on a Mathematical Model of the Cutting Part

EPJ Web of Conferences ◽

10.1051/epjconf/202124804011 ◽

2021 ◽

Vol 248 ◽

pp. 04011

Author(s):

Petr Pivkin ◽

Vladimir Grechishnikov ◽

Artem Ershov ◽

Vladimir Kuptsov ◽

Xiaohui Jiang

Keyword(s):

High Precision ◽

Load Distribution ◽

Rational Design ◽

Structural Parameters ◽

Machine Building ◽

Geometric Parameters ◽

Cutting Edge ◽

Processing Efficiency ◽

Analytical Approaches ◽

Rational Shape

Processing of high-precision holes in one technological operation is an urgent problem of advanced manufacturing. Processing of precise holes in parts for aerospace and machine-building industries with a diameter of up to 30 mm is performed during countersinking, deployment or grinding operations. These operations are applied only if there already exists a pre-treated hole. Monolithic three-fluted drills have been becoming common for processing high-precision holes of 7-8 quality over the last few years. The processing of various types of materials such as stainless steels, cast iron and heat-resistant steels requires rational geometric and structural parameters of the cutting tool. The nature of the load distribution between all the teeth during drilling plays a huge role in the processing efficiency. Even load distribution between the three teeth and a positive geometry improves self-centering and reduces the deviation from the specified axis of the hole. The drill sharpening provides positive geometry along the entire main cutting edge. The influence of the geometric parameters of the cutting edge of the screw groove on the shape of the drill bit is equally important. Existing approaches to the design of the thinning do not account for the influence of the geometric parameters of the cutting edge on the section of the screw groove. Analytical approaches to modelling of the main cutting edges are typically married with difficulties associated with achieving a smooth change in the angle of inclination to the tangent of the cutting edge. The complexity of the aforementioned task is largely due to the presence of critical points at the interface of the spiral groove and thinning. Determining the rational shape of two sections of the main cutting edge performed in this study is a complicated task that includes several steps needed to find the number of nodal points. Achieving a positive rake angle in the normal section to the cutting edge at the gash area that was formed via a special sharpening is one of the most important results of this paper. The rational shape of the cutting edge and the front surface provides an increase in the strength of the cutting part by 1.3 times.

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