Effect of high speed grinding on surface integrity of cycloid gear

2021 ◽  
Author(s):  
Lanying Xu ◽  
Qiang Wu ◽  
Yongbin Huang ◽  
Guoshan Ye
Keyword(s):  
Surface Integrity ◽  
High Speed ◽  
High Speed Grinding

Study on Effect of Grinding Fluid Supply Parameters on Surface Integrity in Quick-Point Grinding for Green Manufacturing

2008 ◽  
Vol 53-54 ◽  
pp. 209-214 ◽  
Author(s):  
Shi Chao Xiu ◽  
Ya Dong Gong ◽  
Guang Qi Cai
Keyword(s):  
Surface Integrity ◽  
High Speed ◽  
Point Contact ◽  
Green Manufacturing ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Grinding Fluid ◽  
Fluid Supply ◽  
High Speed Grinding ◽  
Grinding Power

In high and super-high speed grinding process, there is an airflow layer with high speed around the circle edge of the grinding wheel that hinders the grinding fluid into contact layer, namely, the air barrier effect. The speed of airflow layer is directly proportional to the square of the wheel speed. Quick-point grinding is a new type of high and super-high speed grinding process with a point contact zone and less grinding power. The edge effect of the air barrier is weakened because the thin CBN wheel is applied in the process. By the analysis of dynamic pressure and velocity distributions in the airflow layer around the wheel edge, the mathematic models of the flow and jet pressure of grinding fluid for effective supply in the process were established and the process of optimization calculation of the jet nozzle diameter for green manufacturing was also analyzed based on the thermodynamics and the technical character of quick-point grinding process. The quick-point grinding experiment for surface integrity influenced by grinding fluid supply parameters was performed.

Investigation of Surface Integrity on TC4-DT in High Speed Grinding with CBN Wheel

2014 ◽  
Vol 1027 ◽  
pp. 140-145
Author(s):  
Yao Guang Chen ◽  
Wen Zhuang Lu ◽  
Jun Xu ◽  
Yan Song Zhu ◽  
Dun Wen Zuo
Keyword(s):  
Surface Roughness ◽  
Surface Integrity ◽  
High Speed ◽  
Linear Velocity ◽  
Grinding Wheel ◽  
Cbn Wheel ◽  
Increasing Trend ◽  
High Speed Grinding ◽  
Weak Influence ◽  
Quality Surface

A series of grinding experiments were carried out with CBN wheel to focus on the surface integrity of titanium alloy TC4-DT in high speed grinding . In order to get the proper process parameters to control the surface integrity of the TC4-DT, surface roughness, subsurface morphology and microhardness variations have been studied. In addition to the use of CBN wheel, scanning electron microscopy (SEM), 3-d contour instrument and microhardness tester was applied. The results show that the surface roughness is decreased obviously when grinding wheel linear velocity rises from 60m/s to 80m/s. While the grinding speed rises from 80m/s to 100m/s, the surface roughness value increases slightly. Moreover, the surface roughness value increases with the grinding depth and the increasing trend is obvious in the process of machining. The microstructure analysis shows that during high speed grinding with CBN wheels, good quality surface with 10μm grinding depth can be obtained. Table feed rate has weak influence on the grinding surface topography. The microhardness analysis indicates that surface microhardness increases sharply with the increasing of grinding wheel linear velocity in high speed grinding.

A Practical Study on the Surface Integrity of High-Speed Cylindrical Grinding of SiC

2012 ◽  
Vol 723 ◽  
pp. 202-207
Author(s):  
Jia Ming Ni ◽  
Bei Zhi Li ◽  
Jing Zhu Pang
Keyword(s):  
Surface Integrity ◽  
High Speed ◽  
Ground Surface ◽  
Surface Damage ◽  
Grinding Wheel ◽  
Force Model ◽  
X Ray Diffraction ◽  
High Speed Grinding ◽  
Machining Rate ◽  
Grinding Efficiency

In order to reconcile the contradiction between the ceramic grinding efficiency and surface integrity, high-speed grinding with diamond grinding wheel is supposed to be a solution. In this paper, first of all, a normal grinding force model is proposed based on the consideration of the material property and the grinding process parameters. It can be seen that an elevated grinding wheel velocity in combination of a higher workpiece speed can increase the machining rate while maintaining the desired surface integrity. After a series of grinding tests, a comprehensive measurement has been done to study the surface damage by the surface roughness, the microscope profile and the X-ray diffraction. In particular, the effect of the grinding parameters on the ground surface are analyzed and reported.

Investigation into High-Speed/Super-High Speed Grinding

2011 ◽  
Vol 189-193 ◽  
pp. 4108-4111 ◽  
Author(s):  
Ya Li Hou ◽  
Chang He Li ◽  
Guo Yu Liu
Keyword(s):  
Surface Integrity ◽  
High Speed ◽  
High Efficiency ◽  
Dimensional Accuracy ◽  
Abrasive Machining ◽  
Machining Processes ◽  
Finishing Process ◽  
Key Technologies ◽  
High Speed Grinding ◽  
Advanced Machining

Abrasive machining is a widely employed finishing process for different-to-cut materials such as metals, ceramics, glass, rocks, etc to achieve close tolerances and good dimensional accuracy and surface integrity. High speed and super-high speed abrasive machining technologies are newest developed advanced machining processes to satisfy super-hardness and difficult-to-machining materials machined. In the present paper, high-speed/super-high speed abrasive machining technologies relate to ultra high speed grinding, quick-point grinding, high efficiency deep-cut grinding were analyzed. The efficiency and parameters range of these abrasive machining processes were compared. The key technologies and the newest development and current states of high speed and super-high speed abrasive machining were investigated. It is concluded that high speed and super-high speed abrasive machining are a promising technology in the future.

scholarly journals Experimental Study and Numerical Simulation of the Intermittent Feed High-Speed Grinding of TC4 Titanium Alloy

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 802 ◽  
Author(s):  
Jun Yi ◽  
Wei Zhou ◽  
Zhaohui Deng
Keyword(s):  
Numerical Simulation ◽  
Titanium Alloy ◽  
Surface Integrity ◽  
High Speed ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Temperature ◽  
Tc4 Titanium Alloy ◽  
High Speed Grinding ◽  
Feed Mode

This paper proposes intermittent feed high-speed grinding, which shows considerable advantages in terms of reducing grinding temperature, relieving grinding wheel blockage and improving workpiece surface integrity. In this grinding, the continuous feed mode of the workpiece is changed into the normal feed + fast retreat reciprocating feed mode by a fast linear feed worktable. By reasonably setting the normal feed distance of single grinding, the action time of the grinding wheel and workpiece is reduced, so that the grinding heat transfer process does not reach a stable state, reducing the grinding temperature during single grinding. Besides this, the surface temperature is cooled to nearly room temperature and the grinding wheel is flushed by the timely retreating of the grinding wheel to allow the grinding fluid to enter the grinding zone fully, which greatly reduces the phenomenon of heat accumulation and grinding wheel loading. An intermittent feed high-speed grinding experiment on Ti-6Al-4V (TC4) titanium alloy was systematically carried out, and the influence of the grinding parameters on grinding force and grinding temperature was deeply analyzed. The instantaneous grinding temperature field and thermal stress field of TC4 titanium alloy in intermittent feed high-speed grinding were constructed with the finite element method. The surface morphology of the grinding wheel and TC4 titanium alloy specimens after intermittent feed grinding were analyzed and were compared with those after traditional continuous grinding. It was found that the curves of the grinding force and temperature varied with time in the process of machining, consisting of many “pulse” peaks. Under the same grinding parameters, the magnitude of the grinding force is the same as that of continuous grinding. In a certain range, the grinding temperature is greatly affected by the single feed distance and the interval time. The numerical simulation results are in good agreement with the experimental results, and the error is controlled within 12%. Compared with traditional high-speed grinding, under the same process parameters, the grinding temperature is greatly reduced, the surface integrity of the workpiece is better, and the clogging of the grinding wheel is greatly reduced.

Sign in / Sign up

Export Citation Format

Share Document