high speed grinding lateral

Edge chipping characteristics in grinding SiCf/SiC composite

In terms of machining efficiency, high-speed grinding (HSG) is superior to other machining processes [10]. In addition to the high machining efficiency, HSG also benefits the damage reduction [11]. Choudhary et al. [12] claimed that increasing grinding speed from 40 m/s to 200 m/s reduced the defects by 60% in grinding C f /SiC. The …

Molecular dynamics simulations of scratching characteristics …

As the vibration amplitude increased, the scratched area increased, with displacement and speed in the lateral direction and the fluctuation range the scratch force increased, thereby leading to a significant impact. ... Molecular dynamics research on ultra-high-speed grinding mechanism of monocrystalline nickel. Appl. Surf. Sci., 455 (2018 ...

(PDF) Monitoring and Evaluation of High-Speed …

Last Updated: 26 Aug 2023. PDF | Turnouts are the weak spot in high-speed rail systems, and it is simple for the phenomenon of the wheel–rail force and the …

High-speed rail grinding and metal removal

Grinding speeds in the range of 12-14-plus mph allows for single high-speed grinding passes resulting in shorter track occupancy requirements, an important …

Experimental investigation of surface/subsurface damage …

High-speed grinding has been studied in order to achieve a high material removal rate in the grinding of ceramics [23]. In the high-speed grinding process, an increase in the wheel speed would reduce the maximum chip thickness, and thus the grinding force [24]. This would cause the ductile flow by reducing the tendency for brittle …

Deformation, failure and removal mechanisms of thin film …

High speed grinding, in contrast to conventional speed grinding, has great advantages in achieving favorable surface quality combined with high productivity [91, 92]. The application of high speed grinding in the machining of …

An investigation on material removal mechanism in ultra-high-speed …

Ultra-high-speed grinding is a significant method for the advanced manufacturing of the difficult-to-machine material components, e.g., nickel-based superalloy. However, unclear mechanism of material removal behavior is still the main problem. The present work intends to establish the three-dimensional (3D) finite element simulation …

Mechanical behavior and modeling of grinding force: A …

In the high-speed grinding (HSG) process of cemented carbide, the grinding principle of is explained mainly from two aspects: indentation fracture model and cutting of brittle materials. ... Eventually, when these lateral cracks propagate and reach the free surface, material removal occurs. The constitutive model of hard and brittle materials ...

An investigation on application of nano-fluids in high speed grinding

The reduced grinding scale increases the probability of shear deformation in grinding of hard and brittle materials which is a typical benefit of high speed grinding. Many researchers have utilized this benefit of high speed in grinding of several advanced ceramics and have reported a reduction in the fracture, grinding forces and surface ...

Edge damage prediction and analysis of ceramic

Reasonable ultrasonic-assisted parameters for high-speed dental grinding were first determined. ... Qu et al. [39] observed that when the lateral crack length was higher than the diamond abrasive moving distance in one ultrasonic vibration cycle, the lateral crack would inhibit the generation of radial crack, leading to a reduction in damage ...

Subsurface damage in high-speed grinding of brittle …

Wang et al. (2016) simulated the high speed grinding induced damages and cracks in BK7 glass grinding, which concluded that the effect of grinding depth is weaker than wheel speed and a smaller ...

Analysis on curve negotiating ability of rail grinder in

When number of grinding wheels at work increases, lateral displacement of wheelset, derailment coecient of wheels in front wheelset, ... and analyzed feasibility of high-speed abrasive belt ...

Effects of grinding speed on the material removal …

However, the effects of grinding speed on material removal mechanism of SiC f /SiC are hardly studied, which impedes the application of high speed grinding. In order to reveal the effects of grinding speed on material removal mechanism, this study is to grind SiC f /SiC with different grinding speeds. The highest grinding speed is to over …

Surface generation in high-speed grinding of brittle and

An efficient reduction of approximately 90 % in Sg is realized by increasing the grinding speed from 40 m/s to 200 m/s. For a brittle ceramic like alumina, such a drastic reduction in Sg reduced ...

Dynamic Analysis of a Novel Rail-Grinding Car Using Open …

Nowadays, applying rail grinding has been worldwide recognized as the routine maintenance approach to improving the wheel-rail relationship, as well as extending the rail’s serving life. However, the traditional rail repair technology with the abrasive wheel or the milling cutter is getting harder to meet the increasing demand for …

Surface integrity and material removal mechanisms …

This study carries out high-speed grinding on Al/SiCp MMCs at a grinding speed up to 307.0 m/s, and assesses surface integrity and material removal mechanisms, including surface and subsurface damage, as well as material ductile-to-brittle transition …

Material removal mechanism and corresponding models in the grinding …

The grinding speed has a significant effect on the ground surface features. The surface morphology obtained in high-speed grinding (120 m/s) is smoother than that obtained in conventional speed grinding (20 m/s) [62]. Furthermore, the undeformed chip thickness also has an great impact on the formation of surface defects.

Ductile regime grinding of silicon nitride ceramics based on …

where E is the Young's modulus, H is the hardness, K IC is the static fracture toughness, and Ψ is a dimensionless constant which is equal to 0.15 for ceramic materials [].. The classical critical grinding depth model only considers the static mechanical properties of materials. But the grinding process is a high-speed dynamic machining …

Micromachines | Free Full-Text | The Influence of Crystal

Subsurface damage (SSD) produced in a grinding process will affect the performance and operational duration of single-crystal silicon. In order to reduce the subsurface damage depth generated during the grinding process by adjusting the process parameters (added), experiments were designed to investigate the influence of machining …

Experimental investigations of machining

The material removal in the grinding of alumina and alumina–titania was dominated by grain dislodgement or lateral cracking along grain boundaries. ... development of machining, in particular grinding, technology for advanced ceramics in an efficient mode [6], [7], [8]. High speed grinding has been studied for achieving a high removal rate in ...

Numerical analysis of dynamic characteristics in the ultra-high speed …

In this paper, the dynamic characteristics of ultra-high speed grinding spindle system is analyzed by using digital analysis methods. The spindle system is the key components of the machine tool, and its performance directly determines the machining stability and accuracy. Liquid hybrid bearing, with its superior performance has been …

Rail grinding technology update 2019

Rail milling achieves low (as little as 0.1mm / 0.004in) to high (up to 5mm / 0.2 in, dependent on machine type) metal removal rates in one milling pass with up to 2 kph / …

Kinematic modeling of surface topography ground by an

It is found that the kurtosis and skewness of the profile can reflect the material removal mechanisms in grinding. The lateral pile-up of plastic aluminum alloy in grinding increases the kurtosis while the fracture of brittle fused silica results in a prominently negative skewness. ... Malkin S (2000) High speed grinding of silicon nitride with ...

Microstructural evolution in ultra-precision grinding of …

In grinding of Al/SiC MMCs at an increased speed, high strain-rate induces material embrittlement on one hand and the suppressed plastic deformation substantially reduces the thermal effect in the grinding zone on the other hand, indicating that the material deformation behaviors and corresponding microstructural evolution can differ …

Surface integrity and material removal mechanisms in high-speed …

To explore material removal mechanisms in high-speed grinding, this study carries out high-speed grinding (HSG) on an Al/SiCp MMC at a grinding speed from 30.4 m/s to 307.0 m/s, and assesses surface integrity including surface damage and subsurface damage (SSD) to explore how different grinding speeds take effect therein.

Superabrasive Grinding Characteristics of Additively Manufactured Ti

The lateral flow of the material due to ploughing increases the peak to valley distance and so the roughness. The degree of lateral flow is reported to be related to the hardness of the material. ... Choudhary A, Naskar A, Paul S (2018) Effect of minimum quantity lubrication on surface integrity in high-speed grinding of sintered alumina using ...

Surface roughness modeling for grinding of Silicon …

Finally, composite fracture behavior is analyzed by observing microstructure in the grinding process. The effects of fiber orientation, surface strength, grinding speed, and grinding depth on the surface properties and the quality of C f /SiC composite are studied by grinding force and surface analysis. The mechanism of high-speed grinding of ...

Mechanical behavior and modeling of grinding force: …

The indentation fracture mechanics model is mainly employed to describe the interaction between the abrasive and workpiece. In the high-speed grinding (HSG) …

Design and Dynamic Analysis of a New Rail Grinding

It is concluded that the maximum grinding force can be achieved when the maximum initial grinding pressure is 12N and the smaller feed speed is 200 mm/min and the medium-high line speed is 15.6 m ...

Investigation of subsurface damage considering the abrasive …

Huang H, Yin L, Zhou LB (2003) High speed grinding of silicon nitride with resin bond diamond wheels. J Mater Process Technol 141(3):329–336. Article Google Scholar Chen JY, Shen JY, Huang H, Xu XP (2010) Grinding characteristics in high speed grinding of engineering ceramics with brazed diamond wheels.