Operation Safety and Performance of Milling Cutters with Shank Style Holders of Tool Inserts

Beňo, Jozef; Maňková, Ildikó; Vrabeľ, Marek; Karpuschewski, Bernhard; Emmer, T.; Schmidt, Konrad

doi:10.1016/j.proeng.2012.09.479

Cited by 13 publications

(11 citation statements)

References 11 publications

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“…Commercial milling heads and commercial inserts were used in the experiments. The insert setting errors can be much higher in case of using non-standard cutter heads with special design, for example, in Reference [25]. Since tool assembly may result in a run-out that has a significant impact on the topography, it is advisable to check the run-out every time the inserts are replaced.…”

Section: Discussionmentioning

confidence: 99%

Effects of Setting Errors (Insert Run-Outs) on Surface Roughness in Face Milling When Using Circular Inserts

Felhő

Kundrák

2018

Machines

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In face milling, the roughness of the machined surface varies due to the movement of the cutting edge. Changes in roughness parameter values in the axis of rotation (symmetry plane) have been examined at a constant depth of cut for symmetrical milling. In this paper, the effect of increasing feed per tooth on the topography of the surface is studied in fly-cutting and in multi-point face milling. The study takes into account the axial run-out of the inserts. Theoretical roughness values were modelled, the real values were tested in experiments and in both cases the impact of the run-out of the cutting edges and the change of the chip cross-section were also taken into account. Based on the performed experiments it can be stated that the accuracy of the introduced roughness prediction method increases with the increase in feed and therefore the application of the method in the case of high-feed milling is particularly effective. The results have also shown that the run-out of the insert significantly effects the roughness of the milled surfaces and therefore the measurement and minimization of these setting errors is essential.

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Section: Discussionmentioning

confidence: 99%

Effects of Setting Errors (Insert Run-Outs) on Surface Roughness in Face Milling When Using Circular Inserts

Felhő

Kundrák

2018

Machines

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“…Known schemes of action of forces at the fastening of inserts: C, S, P, M -are realized by various mechanisms. When designing an axial tool, a screw is a fairly common and reliable [13] mounting mechanism that implements Scheme S. However, there are no instructions for constructive implementation, such as the thread axis position to secure the insert securely.…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of Insert Angles on Cutting Tool Geometry

Shvets

Astakhov²

2020

JES

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An analysis of publications has shown that mechanically clamped indexable inserts are predominantly used in modern tool manufacturing. Each insert has its shape and geometry in the tool coordinate system. The static system’s required geometry is achieved by the tilting of the insert pocket in the radial and axial directions. Therefore, it is of great importance in the tool design to know the relationships between the insert’s geometry parameters in the tool coordinate system where the geometry paraments of the insert are defined and working geometry parameters of the tool defined in the static coordinate system. The paper presents the developed methodology for determining the insert pocket base surface position to ensure the required values of the tool geometry parameters of the selected indexable insert in the static coordinate system. The graphs of the dependence of each of the angles of the insert geometry on the angles of rotation of this insert in the front and profile planes are presented as the level lines for practical use. Using these graphs, one can optimize all geometric insertion parameters in the static coordinate system. The model of the calculations of the mechanism of the insert clamping by a screw is developed. The basic size and tolerance of the output link determine the distance from the intersection line of the base surfaces to the thread axis on the pocket and the minimum amount of the screw stroke on the insert clamping in the pocket. Keywords: indexable insert, cutting tool, coordinate system, base surfaces, geometric parameters.

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“…) plane strain plane stress (6) Since the current problem is a linear one, it can be considered that the damage strain is relevant to the fact that the externally loaded axial stress σ c is linear. It is assumed that there are N initial microcrack defects in the cutter material unit model.…”

Section: Fig 4 Sliding Model Of the Microcrackmentioning

confidence: 99%

“…The damage is the change of the local performance of the cutter body components caused by various external factors, which degrades the performance of the milling cutter. The cutter damage evolves from the micro defects in the material, and under the comprehensive action of the fatigue effect and the overload effect of the cutting load, when the micro damage accumulates to a certain extent, the vulnerable and unstable state may be broken at any time, and then massive macroscopic damage appears [6]. Li et al [7] established an application research framework centering on in geometry, computer simulation and finite element analysis based on the proposal of a small-to-large (micro structure -material structure -component structure) hierarchical multiscale analysis method.…”

Section: Introductionmentioning

confidence: 99%

Judging Method of Tooth Damage Behavior of the High Speed Milling Cutter

2018

SV-JME

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In the actual processing of the high speed milling cutter, due to the local damage of milling cutter components, the security and the decline in service life of the milling cutter generally exist, which seriously restricts its technical advantages of high-efficiency and high-precision processing. The tooth damage of the milling cutter is fuzzy and uncertain, which brings obstacles to the improvement of security stability and working efficiency of the milling cutter. The high speed milling cutter is subjected to high centrifugal force and cutting load during the milling process, resulting in damage to the milling components. Based on the material mechanical properties of milling cutter components and the impact experiment under a high strain rate, the damage types and formation mechanism of the milling cutter are analyzed, and the milling cutter damage model is established. The damage equivalent weight is adopted to quantitatively evaluate the damage degree of milling cutter teeth. Finite element simulation is used to find the vulnerable part of the milling cutter in high speed milling. Then the evolution process of milling cutter damage is analyzed, and the recognition and judgment method of milling cutter damage behavior is put forward, and lastly, this judgment method concerning the milling cutter damage is verified through experiment. Keywords: high speed milling cutter, component material, strain rate, damage model Highlights • Damage types and indexes were identified for the high speed milling cutter. • A model that can calculate milling cutter damage under the centrifugal force, the dynamic cutting force and the pre-tightening force was established. • The initial and the critical damage values were obtained by the cutting simulation and the high speed milling test. • Damage behavior features of the milling cutter components materials were analyzed. • A recognition and judgment method of milling cutter damage behavior was put forward.

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Operation Safety and Performance of Milling Cutters with Shank Style Holders of Tool Inserts

Cited by 13 publications

References 11 publications

Effects of Setting Errors (Insert Run-Outs) on Surface Roughness in Face Milling When Using Circular Inserts

Effects of Setting Errors (Insert Run-Outs) on Surface Roughness in Face Milling When Using Circular Inserts

Effect of Insert Angles on Cutting Tool Geometry

Judging Method of Tooth Damage Behavior of the High Speed Milling Cutter

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