scholarly journals Mechanism and Experiment Study of Non-Contact Ultrasonic Assisted Grinding

Actuators ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 238
Author(s):  
Weiqing Huang ◽  
Qunyou Zhong ◽  
Dawei An ◽  
Chenglong Yang ◽  
Yi Zhang
Keyword(s):  
Surface Roughness ◽  
Pressure Control ◽  
Processing Efficiency ◽  
Sapphire Wafer ◽  
Ultrasonic Assisted Grinding ◽  
Ultrasonic Grinding ◽  
Working Face ◽  
Ultrasonic Assisted ◽  
Hard And Brittle Materials ◽  
Grinding Tool

Ultrasonic-assisted grinding processing can effectively reduce the surface roughness and enhance the processing efficiency in the processing of hard and brittle materials. However, the most common ultrasonic assisted grinding is a type of contact ultrasonic grinding where the grinding tool directly contacts the workpiece, which means that it is necessary to accurately control the pre-pressure of the grinding tool on the workpiece. The control of pre-pressure will inevitably increase the complexity of the grinding device, and it is easy to wear the workpiece because of improper pre-pressure control. In this paper, a non-contact ultrasonic grinding method is proposed and the machining mechanism of non-contact ultrasonic grinding is revealed. The resonant frequency of the ultrasonic vibration system and vibration amplitude of the grinding tool working face were simulated and experimentally tested, respectively. Then, the experiment of non-contact ultrasonic grinding of a sapphire wafer was carried out. The result showed that non-contact ultrasonic grinding of the sapphire wafer could reduce the surface roughness by 48.6%. Compared with traditional contact grinding of sapphire wafer under certain pre-pressure conditions, the experimental results show that non-contact ultrasonic grinding has better effects in reducing surface roughness, improving processing efficiency, and improving the quality uniformity of the workpiece machining surface.

Rotary Ultrasonic-Assisted Grinding of Ceramic Material

2012 ◽  
Vol 217-219 ◽  
pp. 1705-1708 ◽  
Author(s):  
Jing Fu Chai ◽  
Wen Qing Song
Keyword(s):  
Surface Roughness ◽  
Ceramic Material ◽  
Zirconia Ceramic ◽  
Precision Machining ◽  
Ultrasonic Assisted Grinding ◽  
Engineering Ceramic ◽  
Grinding Parameters ◽  
Ultrasonic Grinding ◽  
Ultrasonic Assisted ◽  
Grinding Mechanism

The engineering ceramic material is hard to machining with the hard and brittle characteristics, so we are using a precision machining method of the rotary ultrasonic assisted grinding. In this paper, a research on the rotary ultrasonic assisted grinding mechanism of zirconia ceramic material is described. We use an experimental method of the orthogonal combination to complete an experiment of the rotary ultrasonic grinding of zirconia ceramic material. According to the experiment, we explore how the various grinding parameters affect the surface roughness, and determine a set of the optimal grinding parameters.

Experimental Research on Surface Roughness of Ultrasonic Assisted Grinding on 7075 Aluminum Alloy

2021 ◽  
Vol 1047 ◽  
pp. 62-67
Author(s):  
Shen Wang ◽  
Le Tong ◽  
Guang Jun Chen ◽  
Mao Xun Wang ◽  
Bin Dai ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Aluminum Alloy ◽  
Processing Parameters ◽  
7075 Aluminum Alloy ◽  
Machined Surface ◽  
Ultrasonic Assisted Grinding ◽  
Great Performance ◽  
Ultrasonic Assisted ◽  
Conventional Grinding ◽  
Micro Morphology

7075 aluminum alloy is widely used due to its great performance, especially in aerospace area. In this paper, ultrasonic-assisted grinding technology is used to process 7075 aluminum alloy. The data is obtained through experiments, and the surface roughness and morphology of ultrasonic assisted grinding and conventional grinding under different spindle speeds, feed rates, and amplitudes are analyzed. Research has found that the increase in spindle speed and amplitude will improve the quality of the machined surface and reduce the surface roughness by 82.1% and 36%. However, with the increase of feed rate, the surface quality decreased significantly, and the surface roughness increased by 55.6%. The surface micro-morphology of the machined workpiece is observed, and the effects of different processing parameters on the surface micro-morphology are obtained.

Performance Improvement of Ultrasonic-Assisted Grinding Using PCD Micropin Tools

2020 ◽  
Author(s):  
Kai Egashira ◽  
Keishi Yamaguchi ◽  
Minoru Ota
Keyword(s):  
Tool Life ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Polycrystalline Diamond ◽  
High Wear Resistance ◽  
Ultrasonic Assisted Grinding ◽  
Ultrasonic Assisted ◽  
Hard And Brittle Materials ◽  
Peripheral Surface ◽  
Drilling Conditions

Abstract In the present study it was attempted to improve the performance of ultrasonic-assisted grinding using polycrystalline diamond (PCD) micropin tools processed by electrical discharge machining. The micropins acted as grinding tools because the convex parts of discharge craters can serve as cutting edges of abrasive grains in grinding wheels. The drilling conditions to prevent chippings and cracks on the hole edge were experimentally determined and then employed for the drilling of microholes less than 10 μm in diameter. As a result, microholes as small as 5.5 μm in diameter were successfully drilled in hard and brittle materials such as crown glass and monocrystalline silicon. The high wear resistance of PCD improved the tool life, making it possible to mill trenches and to mass-produce holes using a small number of tools. Moreover, the tool life was further improved by processing the tool peripheral surface at a low electrical discharge energy.

Grinding Force and Surface Roughness in Ultrasonic Assisted Grinding of SiC Ceramics with Diamond Grinding Wheel

2013 ◽  
Vol 797 ◽  
pp. 234-239 ◽  
Author(s):  
Li Fei Liu ◽  
Fei Hu Zhang ◽  
Chun Hui Li ◽  
Jiang Chen ◽  
Min Hui Liu
Keyword(s):  
Surface Roughness ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Diamond Grinding Wheel ◽  
Ultrasonic Assisted Grinding ◽  
Diamond Grinding ◽  
Sic Ceramics ◽  
Force Ratio ◽  
Ultrasonic Assisted ◽  
Conventional Grinding

In this paper, experiments are conducted to study the characters of Ultrasonic Assisted Grinding (UAG) and Conventional Grinding (CG), diamond grinding wheel is used in experiments, grinding forces and surface roughness are measured in both UAG and CG. The effects of different parameters on grinding force, surface roughness and force ratio are discussed. The results show that the grinding force and surface roughness in UAG is smaller than those in CG. The force ratio in UAG is lower than that in CG, which reveals that the grinding wheel has a good wear-resistant property in UAG process.

A Study on Ultrasonic Assisted Grinding of Nickel-Based Superalloys

2013 ◽  
Vol 797 ◽  
pp. 356-361
Author(s):  
Wen Qing Song ◽  
Yong Bo Wu ◽  
Jian Guo Cao ◽  
Jing Ti Niu
Keyword(s):  
Surface Roughness ◽  
Grinding Wheel ◽  
Grinding Forces ◽  
Work Surface ◽  
Ultrasonic Assisted Grinding ◽  
Nickel Based Superalloy ◽  
Ultrasonic Assisted ◽  
The Face ◽  
Cbn Grinding Wheel ◽  
Face Grinding

Ultrasonic assisted grinding experiments were carried out to evaluate the effects of the ultrasonic vibration (UV) on the face grinding characteristics of nickel based superalloy of Rene77. In experiments, an electroplated cBN grinding wheel was ultrasonically vibrated dominantly along its axis. The experimental results indicated that the X-axis and Y-axis components of grinding forces with UV were smaller by 44.5% and 31.6%, respectively, than those without UV. The usual fractures and debris on the surface of workpiece disappeared and the work-surface roughness Ra was decreased by 42.3% once the UV was applied. The abrasion of the grinding wheel without UV is more serious than that with UV.

Elliptical Ultrasonic Assisted Grinding (EUAG) of Monocrystal Sapphire – Surface Formation Characteristics

2010 ◽  
Vol 126-128 ◽  
pp. 367-372 ◽  
Author(s):  
Zhi Qiang Liang ◽  
Xi Bin Wang ◽  
Yong Bo Wu ◽  
Wen Xiang Zhao
Keyword(s):  
Surface Roughness ◽  
High Performance ◽  
Depth Of Cut ◽  
Surface Formation ◽  
Work Surface ◽  
Ultrasonic Assisted Grinding ◽  
Bending Mode ◽  
Ultrasonic Assisted ◽  
Conventional Grinding ◽  
Elliptical Motion

This study investigates surface formation characteristics in elliptical ultrasonic assisted grinding (EUAG) of monocrystal sapphire. During EUAG process, the workpiece is imposed to ultrasonically vibrate in two directions, i.e., vertical and parallel to work-surface, by using an elliptical ultrasonic vibrator. In our previous work, the vibrator has been produced by bonding a piezoelectric ceramic device (PZT) on a metal elastic body. When two alternating current voltages with a phase difference are applied to the PZT at the same frequency that is close to the resonant frequency of the longitudinal and bending mode of the vibrator, two dimensional ultrasonic vibrations are generated simultaneously, resulting in an elliptical motion on the end face of the vibrator. In this paper, to clarify the work-surface formation characteristics in EUAG of sapphire material, grinding experiments are carried out involving sapphire substrate. In experiments, work-surface roughness is measured, and the ground work-surface morphology is examined by scanning electron microscope (SEM). The experimental results are summarized as: (1) Compared with conventional grinding (CG), the elliptical vibration leads to a decrease of surface roughness up to 25% in EUAG; (2) The surface roughness has a monotonously increasing trend with the increasing wheel depth of cut in both EUAG and CG, but has little variation with the worktable feed rate. As the wheel speed increases, the surface roughness decreases until it reaches a minimum, and then increases in a monotonous trend in both EUAG and CG; (3) The surface quality in EUAG has a significant improvement, and it is prone to achieve the ductile regime grinding of sapphire compared with CG. These indicate that the elliptical ultrasonic assisted grinding is an efficient technique for high performance machining of monocrystal sapphire.

The Influence of Amplitude on Grinding Force and Surface Roughness in Ultrasonic Assisted Grinding of K9 Glass

2014 ◽  
Vol 1017 ◽  
pp. 741-746
Author(s):  
Fei Fei Zheng ◽  
Fu Jian Ma ◽  
Yi Dan Wang ◽  
Zhi Gang Dong ◽  
Ren Ke Kang
Keyword(s):  
Surface Roughness ◽  
Significant Influence ◽  
Vibration Amplitude ◽  
Grinding Force ◽  
Machining Process ◽  
Grinding Process ◽  
Ultrasonic Assisted Grinding ◽  
Ultrasonic Assisted ◽  
Promising Solution ◽  
K9 Glass

Ultrasonic assisted grinding (UAG) has been a promising solution for the machining of brittle materials. The vibration amplitude in UAG has significant influence on the machining process. In this paper, the experiments which apply UAG process on K9 glass were conducted to investigate the effect of amplitude upon grinding force and surface roughness. Theoretical calculation was done to explain the phenomenon observed and to analyze how vibration affects the grinding process. The conclusion is reached that the vibration amplitude should be cogitatively set to achieve better surface quality while realizing the reduction of the grinding force.

Measurements of Surface Roughness in Ultrasonic Assisted Grinding of Ceramic Materials

2014 ◽  
Vol 627 ◽  
pp. 191-196 ◽  
Author(s):  
Roman Wdowik ◽  
Marek Magdziak ◽  
Janusz Porzycki
Keyword(s):  
Surface Roughness ◽  
Ceramic Material ◽  
Ceramic Materials ◽  
Machining Process ◽  
Grinding Wheel ◽  
Machining Processes ◽  
Ultrasonic Assisted Grinding ◽  
Ultrasonic Assisted ◽  
Hybrid Machining Process ◽  
Roughness Measurements

The paper presents the results of investigations regarding surface roughness measurements in ultrasonic assisted grinding of selected ZrO2 based ceramic material. There are different results, in the area of surface roughness measurements, presented in the literature. The entry data of hybrid machining process (e.g. grinding wheel type, feed, machining strategy or process variant) may influence these results. The analysis of literature encourages to take up the investigations of surface quality in ultrasonic assisted machining. These investigations may be performed for specific ceramic products and technological tasks which are commonly applied in ceramic machining processes. The knowledge about the machining of ceramic materials in different sintering states is very limited. Based on this finding, ultrasonic assisted and conventional machining processes of ZrO2 based ceramic material in different sintering states were investigated.

Sign in / Sign up

Export Citation Format

Share Document