Drilling machinability of engineering ceramics under low-frequency axial vibration processing by sintering/brazing composite diamond trepanning bit

Liu, Zheng; Wei, Wendong; Feng, Yong; Dong, Xianglong; Zhang, Chen; Zeng, Yong; Huan, Haixiang

doi:10.1016/j.ceramint.2019.03.077

Cited by 12 publications

(6 citation statements)

References 21 publications

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“…Nath et al (2012) reported the influence of material-removal mechanisms on different aspects of hole integrity, such as entrance chipping, wall roughness, and subsurface damage, during the ultrasonic machining of silicon carbide, zirconia, and alumina ceramics. Zheng et al (2019) investigated the drilling machinability of alumina and silicon carbide ceramics using low-frequency axial vibrations with a diamond trepanning bit. Vibratory machining is often used for the mechanical drilling of ceramics.…”

Section: Introductionmentioning

confidence: 99%

Through-hole drilling characteristics of alumina ceramics using diamond-coated carbide drill

OKADA,

HIRATA,

WATANABE

et al. 2024

JAMDSM

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The drilling characteristics of alumina ceramics during through-hole drilling with a diamond-coated carbide drill were investigated experimentally. The drilling characteristics were evaluated by cutting edge behavior, cutting force (thrust force and torque), and chipping state at the exit side of the drilled hole in relation to the number of drilled holes. Additionally, the effects of the diamond-coating thickness and drill feed rate were investigated. The drills had a typical twist shape and were made of tungsten carbide base material with diamond coatings at 10 µm and 20 µm thick. The drilling machine was a standard machining center with a simple unidirectional drill feed without vibration. In through-hole drilling, as in blind-hole drilling, the coating on the rake face flaked during the initial stage of drilling, resulting in a sharp cutting edge on the diamond-coating ridge remaining on the flank face. However, flaking of the diamond coating on the rake face was observed earlier during through-hole drilling than in blind-hole drilling. Although the chipping area increased with increasing drill feed rate, coating flaking on the rake face significantly suppressed it at all feed rates. There was a clear correlation between the chipping area and cutting force since the chipping area decreased with decreasing thrust force. Before the theoretical hole penetration, hat-shaped chipping was observed with two crack propagation directions, accompanied by a sharp decrease in thrust force. Moreover, even after observing a sharp decrease in thrust force, a gradual decrease in thrust force was observed in the case of a good chipping state. The chipping area was significantly improved by reducing the coating thickness, and the thrust force was reduced.

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Section: Introductionmentioning

confidence: 99%

Through-hole drilling characteristics of alumina ceramics using diamond-coated carbide drill

OKADA,

HIRATA,

WATANABE

et al. 2024

JAMDSM

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show abstract

“…The research results indicate that the axial force and torque decrease with the increase in spindle speed, while the change is not significant with the increase in feed rate. Zheng et al [ 22 ] conducted constant feed rate drilling experiments on Al 2 O 3 and SiC materials using a diamond drill and studied the changes in axial force and hole wall surface microstructure during the drilling process. Table 1 compares previous research on the trepanning processing of hard and brittle materials.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling and Experimental Study of Cutting Force for Cutting Hard and Brittle Materials in Fixed Abrasive Trepanning Drill

Zou

et al. 2023

Micromachines

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Hard and brittle materials have excellent physical and mechanical performance, which are widely applied in the fields of microelectronics and optoelectronics. However, deep-hole machining of hard and brittle materials is very difficult and inefficient due to the high hardness and brittleness of these materials. To improve the quality and efficiency of deep-hole machining of hard and brittle materials, according to the brittle crack fracture removal mechanism of hard and brittle materials and the cutting model of the trepanning cutter, an analytical cutting force prediction model of hard and brittle materials processed using a trepanning cutter is established. This experimental study of K9 optical glass machining shows that as the feeding rate increase, the cutting force increase, and as the spindle speed increase, the cutting force decrease. By comparing and verifying the theoretical and experimental values, the average errors of axial force and torque are 5.0% and 6.7%, respectively, and the maximum error is 14.9%. This paper analyzes the reasons for the errors. The results indicate that the cutting force theoretical model can be used to predict the axial force and torque of machining hard and brittle materials under the same conditions, which provides a theory for optimizing machining process parameters.

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“…The research results indicate that the surface roughness of the drilling holes obtained using RUM is lower than CD. Zheng et al [ 9 ] conducted constant feed rate drilling experiments on Al 2 O 3 and S i C materials using a diamond drill and studied the changes in the axial force and surface microstructure of the bore wall during the drilling machining. Gao et al [ 10 ] analyzed the effects of axial force and rotational speed on drilling efficiency and hole quality by conducting experiments on machining Al 2 O 3 armored ceramics using a fixed diamond drill bit.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Influence of Process Parameters on the Workpiece Surface Quality in the Cutting of Hard and Brittle Materials with Trepanning Drill

Yu,

Li,

Zou

et al. 2023

Materials

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Hard and brittle materials have excellent physical and mechanical properties and are widely used in the fields of microelectronics and optoelectronics. However, due to their high hardness and brittleness, the machining quality of a workpiece struggles to meet the requirements of practical applications. In order to improve the surface quality of deep-hole machining of hard and brittle materials, this article analyzes the formation mechanism of surface roughness and the exit-chipping width during the drilling machining of hard and brittle materials and establishes a mathematical prediction model for the surface roughness and the exit-chipping width of hard and brittle materials using a trepanning cutter. The experimental study on K9 optical glass machining shows that the surface roughness of the workpiece and the exit-chipping width increase with the increase in feed rate, and decrease with the increase in rotational speed. Through comparison and verification between theoretical and experimental values, the average errors of workpiece surface roughness and the exit-chipping width are 13.15% and 6.73%, respectively. This article analyzes the reasons for the errors. The results indicate that the theoretical model proposed in this article can be used to predict the surface roughness and the exit-chipping width of hard and brittle materials processed under the same conditions, providing a theoretical basis to optimize process parameters to improve the surface quality of the workpiece.

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Drilling machinability of engineering ceramics under low-frequency axial vibration processing by sintering/brazing composite diamond trepanning bit

Cited by 12 publications

References 21 publications

Through-hole drilling characteristics of alumina ceramics using diamond-coated carbide drill

Through-hole drilling characteristics of alumina ceramics using diamond-coated carbide drill

Mathematical Modeling and Experimental Study of Cutting Force for Cutting Hard and Brittle Materials in Fixed Abrasive Trepanning Drill

A Study on the Influence of Process Parameters on the Workpiece Surface Quality in the Cutting of Hard and Brittle Materials with Trepanning Drill

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