Studying the microhardness on the surface of SKD61 in PMEDM using tungsten carbide powder

2020 ◽  
Vol 34 (22n24) ◽  
pp. 2040164
Author(s):  
Van Tao Le ◽  
Tien Long Banh ◽  
Xuan Thai Tran ◽  
Thi Hong Minh Nguyen ◽  
Van Thao Le
Keyword(s):  
Tungsten Carbide ◽  
Electrical Discharge ◽  
Alloy Powder ◽  
Electrical Discharge Machining ◽  
Process Window ◽  
Carbide Powder ◽  
Hard Materials ◽  
Tungsten Carbide Powder ◽  
Edm Process ◽  
Better Than

Electrical discharge machining (EDM) process is widely used to process hard materials in the industry. The process of electrical discharge is changed and called PMEDM when alloy powder is added in the oil dielectric. In this study, the effect of tungsten carbide alloy powder added in the dielectric on the microhardness of surface (HV) status of the workpiece SKD61 after machining is investigated. Studies show that the microhardness of surface obtained by PMEDM is generally better than that by normal EDM. The experiment shows that at the selected process window, adding the powder has resulted in an improvement of the microhardness up to 129.17%.

Surface Modification Process by Electrical Discharge Machining with Tungsten Carbide Powder Mixing in Kerosene Fluid

2019 ◽  
Vol 889 ◽  
pp. 115-122
Author(s):  
Van Tao Le ◽  
Tien Long Banh ◽  
Xuan Thai Tran ◽  
Nguyen Thi Hong Minh
Keyword(s):  
Surface Roughness ◽  
Tungsten Carbide ◽  
Electrical Discharge ◽  
Alloy Powder ◽  
Electrical Discharge Machining ◽  
Carbide Powder ◽  
Micro Hardness ◽  
Hard Materials ◽  
Tungsten Carbide Powder ◽  
Better Than

Electrical discharge machining (EDM) process is widely used to process hard materials in the industry. The process of electrical discharge is changed and called PMEDM when alloy powder is added in the oil dielectric. In the current study, the effect of tungsten carbide alloy powder added in the dielectric on the surface roughness (Ra) and the micro hardness of surface (HV) status of the workpiece SKD61 after machining is investigated. Studies show that the surface roughness and the micro hardness of surface obtained by PMEDM is generally better than that by normal EDM. The method can be applied for improving surface quality such as improving strengthening of molds and machine parts.

scholarly journals IMPROVING SURFACE ROUGHNESS BY ELECTRICAL DISCHARGE MACHINING WITH TUNGSTEN POWDER

2019 ◽  
Vol 9 (1) ◽  
pp. 44-53
Author(s):  
Vantao Le ◽  
Tienlong Banh ◽  
Xuanthai Tran ◽  
Thi Hong Minh Nguyen
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Alloy Powder ◽  
Electrical Discharge Machining ◽  
Tungsten Powder ◽  
High Surface ◽  
Process Window ◽  
Hard Materials ◽  
Edm Process ◽  
Better Than

Electrical discharge machining (EDM) process is widely used to process hard materials in the industry. The process of electrical discharge is changed and called PMEDM when alloy powder is added in the oil dielectric. Studies show that the surface roughness (Ra) obtained by PMEDM is generally better than that by normal EDM. In the current study, the effect of tungsten carbide alloy powder added to the dielectric on the surface roughness status of the workpiece SKD61 after machining is investigated. The experiment shows that at the selected process window, adding the powder has resulted in an improvement of the surface roughness up to 57.98% as compared to the high surface roughness Ra of 0.471 μm by normal EDM.

Fabrication of Micropins Using Micro Turning Tools

2012 ◽  
Vol 523-524 ◽  
pp. 76-80 ◽  
Author(s):  
Takuya Furukawa ◽  
Yosuke Nomura ◽  
Kazuyuki Harada ◽  
Kai Egashira
Keyword(s):  
Tungsten Carbide ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Cutting Tools ◽  
Depth Of Cut ◽  
Feed Speed ◽  
Tool Breakage ◽  
Micro Cutting ◽  
Hard Materials ◽  
Micro Turning

The turning of straight micropins with a diameter smaller than 10 µm, which has not been reported so far, was carried out using micro turning tools made of cemented tungsten carbide. Tools of 50 µm diameter were fabricated by electrical discharge machining, which is suitable for fabricating micro cutting tools because it can deal with hard materials and carry out micromachining. A turning machine designed especially for micro turning tools was used in the experiments. A brass workpiece was turned using a tool with a length of cut of 100 µm at a feed speed of 3.0 µm/s, feed per revolution of 0.06 µm and depth of cut of 10–11 µm. As a result, a straight micropin of 7.5 µm diameter and 80 µm length was successfully turned. Furthermore, turning was also performed using a tool with a length of cut of 50 µm at a feed speed of 3.0 µm/s, feed per revolution of 0.06 µm and depth of cut of 8.5–20 µm to fabricate a straight micropin of 3 µm diameter and 30 µm length. This micropin is the pin with the smallest ever diameter fabricated by turning, to the best of our knowledge, indicating the possibility of further minimization of the machinable size in turning. Turning properties were also investigated to determine the maximum depth of cut and feed speed that can be employed without tool breakage.

Study on Micro Reversible Electrical Discharge Machining Method for the Fabrication of Micro Structures

2009 ◽  
Vol 626-627 ◽  
pp. 279-284 ◽  
Author(s):  
Zi Long Peng ◽  
Zhen Long Wang ◽  
Yu Kui Wang ◽  
Ying Huai Dong ◽  
H. Chen
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Deposition Process ◽  
Machining Process ◽  
Micro Electrical Discharge Machining ◽  
Steel Material ◽  
Machining System ◽  
Micro Structures ◽  
Edm Process ◽  
Better Than

A reversible machining method using micro electrical discharge machining (EDM) was developed. This new method can achieve depositing or selective removing of metal material for the fabrication of micro structures. It is easy to transform the machining process from deposition to removal in one EDM machining system. In micro EDM deposition process, brass, tungsten and steel material can be deposited successfully. The deposited material has compact fine texture and combines close to workpiece. Then, micro complex structures by series deposition strategy and sub-deposition strategy were deposited. In the selective removal process, the machining effects of different working mediums were researched. Results show that the machining effect in liquid medium is better than that of in air. Finally, using the micro reversible EDM process, a micro square column with 0.070mm in side length, 0.750mm in height and a micro cylinder with 0.140mm in diameter, 1.180mm in height were fabricated.

scholarly journals The effect of electrical discharge machining parameters on alloy DIN 1.2080 using the Taguchi method and determinant of optimal design of experiments

2017 ◽  
Vol 14 (1) ◽  
pp. 47-64 ◽  
Author(s):  
Pouyan Sadr ◽  
Amin Kolahdooz ◽  
Seyyed Ali Eftekhari
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
High Hardness ◽  
Machining Parameters ◽  
Hard Materials ◽  
Pulse Off Time ◽  
Off Time ◽  
Edm Process

Electrical Discharge Machining (EDM) process is one of the most widely used methods for machining. This method is used to form parts that conduct electricity. This method of machining has used for hard materials and therefore select the correct values of parameters are so effective on the quality machining of parts. D3 steel has a high abrasion resistance at low temperatures therefore can be a good candidate for this method of machining. Also because of high hardness and low distortion during heat treatment, using this method is economical for this alloy. The purpose of this paper is to investigate the influence of the main parameters such as voltage, current, pulse duration and pulse off time and the interaction of them to determine the optimal condition for the D3 steel alloy (alloy with DIN 1.2080). Chip removal rate (MRR) and surface quality of parts were evaluated as the output characteristic of the study. The optimum conditions were achieved when the MRR is in the highest value and surface roughness is in the lowest one. For investigation of interaction, two kinds of DOE methods (Taguchi and determinant of optimal experimental design) are used. Then the optimal parameters are investigated with the help of the analysis signal to noise (S/N) and mathematical modeling. The optimize results were tested again and compared. Also the results showed that regression modeling has better accuracy than the S/N analysis. This is because of a greater number of experiments that done in this part and taking into account the interaction parameters in the regression model.

A Study on Influence of Input Parameters on Surface Roughness in PMEDM Cylindrical Shaped Parts

2021 ◽  
Vol 1018 ◽  
pp. 65-70
Author(s):  
Tran Thi Hong ◽  
Bui Thanh Danh ◽  
Nguyen Van Cuong ◽  
Le Hong Ky ◽  
Nguyen Hong Linh ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Dielectric Fluid ◽  
Carbide Powder ◽  
Improve Quality ◽  
Input Parameters ◽  
Edm Process ◽  
Optimum Input

In electrical discharge machining (EDM) powder material can be mixed into the dielectric fluid to improve quality of machining surface of components. Therefore, finding suitable input parameters of this process becomes an important task. This paper presents a methodology to find the optimum input factors of the EDM process when adding nanosilicon carbide powder into the dielectric fluid for processing cylindrical shaped parts. In this research, the Taguchi method was used for experiment design in order to investigate the effect of the input parameters on the surface roughness. Also, optimum input factors for minimum surface roughness (RS) was proposed. The result from the deviation of SRbetween the analysis and the experiment demonstrates that the optimum input parameters are helpful to predict the value of surface roughness. Therefore, this can increase the economic and technical effectiveness in EDM process.

Investigation of the Spark Cycle Effect on Material Removal Rate in Wire Electrical Discharge Machining

Manufacturing ◽  
2003 ◽  
Author(s):  
Scott F. Miller ◽  
Albert J. Shih
Keyword(s):  
Process Parameters ◽  
Material Removal Rate ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Short Circuit ◽  
Wire Electrical Discharge Machining ◽  
Time Duration ◽  
Edm Process

The development of new, advanced engineering materials and the needs for precise and flexible prototype and low-volume production have made wire electrical discharge machining (EDM) an important manufacturing process to meet such demand. This research investigates the effect of spark on-time duration and spark on-time ratio, two important EDM process parameters, on the material removal rate (MRR) and surface integrity of four types of advanced material: porous metal foams, metal bond diamond grinding wheels, sintered Nd-Fe-B magnets, and carbon-carbon bipolar plates. An experimental procedure was developed. During the wire EDM, five types of constraints on the MRR due to short circuit, wire breakage, machine slide speed limit, and spark on-time upper and lower limits have been identified. An envelope of feasible EDM process parameters is created and compared across different work-materials. Applications of such process envelope to select process parameters for maximum MRR and for machining of micro features are presented.

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