The Effects of Depth of Cut and Dressing Conditions on the Surface Integrity in Creep Feed Grinding of Inconel 792-5A

Creep-Feed Grinding(CFG) is one of the none-traditional machining in which form grinding to full depth is performed in limited number of passes. One of the most significant criteria which is taken into account to display valid machining parameters, is surface integrity. Surface integrity in CFG process is influenced by four main factors including surface roughness, superficial micro-crack, burning and changes in micro-hardness. According to prior investigations in CFG process, depth of cut plays an important role in surface integrity. In this study, the influence of cutting depth on workpiece surface integrity of cast nickel-based superalloy with alummina wheels, was investigated. During this study, a sample part was machined with variable depth of cut while the other parameters were Constant. After machining, surface roughness of each specimen was measured and in order to investigate existence and dimensional situation of surface micro-cracks, Chemical Etch + FPI and Thermal shock + FPI were performed. For determining micro-structural changes in ground specimens as a clarifier criteria in measuring the level of residual stress, a set of recrystallization processes were carried out on them and average grain size were measured. The results show, however, changing in depth of cut hasn't influenced on micro-cracks, quality of surface roughness has descended in terms of increasing the cutting depth.

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Effect of creep feed grinding on surface integrity and fatigue life of Ni3Al based superalloy IC10

Chinese Journal of Aeronautics ◽

10.1016/j.cja.2020.02.025 ◽

2020 ◽

Cited By ~ 1

Author(s):

Shuaiqi ZHANG ◽

Zhongxue YANG ◽

Ruisong JIANG ◽

Qichao JIN ◽

Qiang ZHANG ◽

...

Keyword(s):

Fatigue Life ◽

Surface Integrity ◽

Creep Feed Grinding ◽

Creep Feed

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Surface Integrity Study of Creep-Feed Grinding

Applied Engineering Letters Journal of Engineering and Applied Sciences ◽

10.18485/aeletters.2020.5.3.4 ◽

2020 ◽

Vol 5 (3) ◽

pp. 94-103

Author(s):

Marin Gostimirovic ◽

Milenko Sekulic ◽

Dragan Rodic

Keyword(s):

Surface Integrity ◽

Creep Feed Grinding ◽

Creep Feed

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Control of Cutting Force for Creep-Feed Grinding Processes Using a Multi-Level Fuzzy Controller

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.2718238 ◽

2006 ◽

Vol 129 (4) ◽

pp. 480-492 ◽

Cited By ~ 17

Author(s):

Chengying Xu ◽

Yung C. Shin

Keyword(s):

Real Time ◽

Grinding Force ◽

Open Architecture ◽

Depth Of Cut ◽

Grinding Wheel ◽

Grinding Process ◽

Stable Range ◽

Creep Feed Grinding ◽

Creep Feed ◽

Multi Level

In this paper, a multi-level fuzzy control (MLFC) technique is developed and implemented for a creep-feed grinding process. The grinding force is maintained at the maximum allowable level under varying depth of cut, so that the highest metal removal rate is achieved with a good workpiece surface quality. The control rules are generated heuristically without any analytical model of the grinding process. Based on the real-time force measurement, the control parameters are adapted automatically within a stable range. A National Instrument real-time control computer is implemented in an open architecture control system for the grinding machine. Experimental results show that the cycle time has been reduced by up to 25% over those without force control and by 10–20% compared with the conventional fuzzy logic controller, which indicates its effectiveness in improving the productivity of actual manufacturing processes. The effect of grinding wheel wear is also considered in the creep-feed grinding process, where the grinding force/power can be maintained around the specified value by the proposed MLFC controller as the wheel dulls gradually.

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Grindability and Surface Integrity of Cast Nickel-based Superalloy in Creep Feed Grinding with Brazed CBN Abrasive Wheels

Chinese Journal of Aeronautics ◽

10.1016/s1000-9361(09)60247-8 ◽

2010 ◽

Vol 23 (4) ◽

pp. 501-510 ◽

Cited By ~ 77

Author(s):

Ding Wenfeng ◽

Xu Jiuhua ◽

Chen Zhenzhen ◽

Su Honghua ◽

Fu Yucan

Keyword(s):

Surface Integrity ◽

Nickel Based Superalloy ◽

Creep Feed Grinding ◽

Creep Feed

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Ductile and Brittle Mode Grinding of Fused Silica

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.447-448.21 ◽

2010 ◽

Vol 447-448 ◽

pp. 21-25 ◽

Cited By ~ 9

Author(s):

Peng Yao ◽

Nobuhito Yoshihara ◽

Nobuteru Hitomi ◽

Ji Wang Yan ◽

Tsunemoto Kuriyagawa

Keyword(s):

Surface Integrity ◽

High Efficiency ◽

High Surface ◽

Ground Surface ◽

Fused Silica ◽

Wheel Speed ◽

Depth Of Cut ◽

Creep Feed ◽

Ductile Mode ◽

Brittle Mode

There is a demand for high-efficiency and high surface integrity grinding of fused silica. Ductile grinding is an ideal method for producing a mirror finished surface on hard and brittle materials to significantly decrease polishing time. However, the fused silica is still difficult to ductile grind because of its high brittleness. A creep feed taper grinding method was applied to investigate the relationship between maximum grit depth of cut and surface integrity of fused silica. Ductile mode grinding was achieved on fused silica. When the depth of cut exceeds the critical wheel depth of cut, the surface suddenly changes from the ductile mode to the brittle mode. At the same ratio of wheel speed and table speed, the critical wheel depth of cut is noticeably increased by increasing the wheel speed which caused an increase in the temperature at the interface of grains and workpiece. The depth of subsurface damage (SSD) was investigated by polishing the ground surface. The experiment results show that the depth of SSD is deepest in transition mode and stables in brittle mode.

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