The Experts below are selected from a list of 774 Experts worldwide ranked by ideXlab platform

Xiaowei Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Experimental research on the energy ratio coefficient and specific grinding energy in nanoparticle jet MQL grinding
    The International Journal of Advanced Manufacturing Technology, 2015
    Co-Authors: Dongkun Zhang, Yanbin Zhang, Dongzhou Jia, Xiaowei Zhang
    Abstract:

    Nanoparticles are solid nanoscale particles with features such as antiwear, antifriction, and high load-carrying capacity. This research applied nanoparticles in the cooling Lubrication of grinding and theoretically analyzed the impact of cooling Lubrication on the grinding surface through the energy ratio coefficient and specific grinding energy. First, the workpiece surface temperature was measured using a thermal infrared imager. A three-dimensional dynamometer was used to identify the tangential grinding force during grinding. Results showed that, with different cooling Lubrication approaches, the grinding surface was distributed to workpiece, grinding wheel, grinding fluid, and abrasive debris according to different energy ratio coefficients. The calculation demonstrated that the energy ratio coefficient of dry grinding reached 64.3 %. However, the energy ratio coefficient of Flood Lubrication, minimal quantities of lubricant (MQL), and nanoparticle jet MQL was 36.8, 52.1, and 41.4 %, respectively. These findings indicated that nanoparticle jet MQL realized a cooling effect close to that of Flood Lubrication. The specific grinding energy of nanoparticle jet MQL was 35 J/mm3, which was close to that of Flood Lubrication at 29.8 J/mm3. This finding indicated that the Lubrication effects of nanoparticle jet MQL were also similar to those of Flood Lubrication. Moreover, molybdenum disulfide, carbon nanotube (CNT), and zirconium oxide nanoparticles were added in the grinding fluid to conduct the grinding experiment with nanoparticle jet MQL. The comparison of energy ratio coefficients showed that the cooling performance of CNT nanoparticles was satisfactory. CNT nanoparticles were subsequently added into the grinding fluid at the volume concentrations of 1, 2, and 3 % for the grinding experiment. The results showed that the best cooling effects occurred under the 2 % volume concentration of CNT nanoparticles. Through rounds of selections and optimizations, our research acquired the nanoparticle types and volume concentration that had satisfactory cooling effects and should therefore be added in the grinding fluid.

  • Experimental evaluation of MoS2 nanoparticles in jet MQL grinding with different types of vegetable oil as base oil
    Journal of Cleaner Production, 2015
    Co-Authors: Yanbin Zhang, Changhe Li, Dongkun Zhang, Dongzhou Jia, Xiaowei Zhang
    Abstract:

    In consideration of the combined present research situation of vegetable oil as minimum quantity Lubrication (MQL) base oil domestically and abroad, the lubricating property of soybean oil, palm oil, and rapeseed oil as base oil in comparison with liquid paraffin was explored. In the experiment, a numerical control precision surface grinder was used for plain grinding on a 45 steel workpiece. The effect of adding MoS2 nanoparticle with a particle size of 50 nm was studied. Four types of grinding working conditions were applied: dry grinding, Flood Lubrication (5% water-soluble grinding fluid), MQL (base oil, including three types of vegetable oils and liquid paraffin), and nanoparticle jet MQL (containing nanoparticles at different concentrations). Grinding force, particle size, viscosity of nanofluids, and workpiece surface roughness were measured. The experimental results indicate that palm oil-based nanofluids added with MoS2 nanoparticles produce the best lubricating property in the nanoparticle jet MQL condition because of the high saturated fatty acid and high film-forming property of carboxyl groups in palm oil. As viscosity has a different effect on lubricating performance and heat transfer performance, high viscosity of nanofluids significantly reduced heat transfer performance while enhancing Lubrication performance. In consideration of the lubricating property and heat transfer performance, the best choice of base oil is soybean oil, which has the lowest viscosity. With the improvement of MoS2 mass fraction in soybean oil-based nanofluids, the increase in nanofluid viscosity leads to improved lubricating property. However, excessive mass fraction will result in nanoparticle agglomeration and will break the lubricating property. In the experiment, 6% mass fraction was identified to be the optimal addition concentration for molybdenum disulfide nanoparticles.

Yanbin Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Experimental research on the energy ratio coefficient and specific grinding energy in nanoparticle jet MQL grinding
    The International Journal of Advanced Manufacturing Technology, 2015
    Co-Authors: Dongkun Zhang, Yanbin Zhang, Dongzhou Jia, Xiaowei Zhang
    Abstract:

    Nanoparticles are solid nanoscale particles with features such as antiwear, antifriction, and high load-carrying capacity. This research applied nanoparticles in the cooling Lubrication of grinding and theoretically analyzed the impact of cooling Lubrication on the grinding surface through the energy ratio coefficient and specific grinding energy. First, the workpiece surface temperature was measured using a thermal infrared imager. A three-dimensional dynamometer was used to identify the tangential grinding force during grinding. Results showed that, with different cooling Lubrication approaches, the grinding surface was distributed to workpiece, grinding wheel, grinding fluid, and abrasive debris according to different energy ratio coefficients. The calculation demonstrated that the energy ratio coefficient of dry grinding reached 64.3 %. However, the energy ratio coefficient of Flood Lubrication, minimal quantities of lubricant (MQL), and nanoparticle jet MQL was 36.8, 52.1, and 41.4 %, respectively. These findings indicated that nanoparticle jet MQL realized a cooling effect close to that of Flood Lubrication. The specific grinding energy of nanoparticle jet MQL was 35 J/mm3, which was close to that of Flood Lubrication at 29.8 J/mm3. This finding indicated that the Lubrication effects of nanoparticle jet MQL were also similar to those of Flood Lubrication. Moreover, molybdenum disulfide, carbon nanotube (CNT), and zirconium oxide nanoparticles were added in the grinding fluid to conduct the grinding experiment with nanoparticle jet MQL. The comparison of energy ratio coefficients showed that the cooling performance of CNT nanoparticles was satisfactory. CNT nanoparticles were subsequently added into the grinding fluid at the volume concentrations of 1, 2, and 3 % for the grinding experiment. The results showed that the best cooling effects occurred under the 2 % volume concentration of CNT nanoparticles. Through rounds of selections and optimizations, our research acquired the nanoparticle types and volume concentration that had satisfactory cooling effects and should therefore be added in the grinding fluid.

  • Experimental evaluation of MoS2 nanoparticles in jet MQL grinding with different types of vegetable oil as base oil
    Journal of Cleaner Production, 2015
    Co-Authors: Yanbin Zhang, Changhe Li, Dongkun Zhang, Dongzhou Jia, Xiaowei Zhang
    Abstract:

    In consideration of the combined present research situation of vegetable oil as minimum quantity Lubrication (MQL) base oil domestically and abroad, the lubricating property of soybean oil, palm oil, and rapeseed oil as base oil in comparison with liquid paraffin was explored. In the experiment, a numerical control precision surface grinder was used for plain grinding on a 45 steel workpiece. The effect of adding MoS2 nanoparticle with a particle size of 50 nm was studied. Four types of grinding working conditions were applied: dry grinding, Flood Lubrication (5% water-soluble grinding fluid), MQL (base oil, including three types of vegetable oils and liquid paraffin), and nanoparticle jet MQL (containing nanoparticles at different concentrations). Grinding force, particle size, viscosity of nanofluids, and workpiece surface roughness were measured. The experimental results indicate that palm oil-based nanofluids added with MoS2 nanoparticles produce the best lubricating property in the nanoparticle jet MQL condition because of the high saturated fatty acid and high film-forming property of carboxyl groups in palm oil. As viscosity has a different effect on lubricating performance and heat transfer performance, high viscosity of nanofluids significantly reduced heat transfer performance while enhancing Lubrication performance. In consideration of the lubricating property and heat transfer performance, the best choice of base oil is soybean oil, which has the lowest viscosity. With the improvement of MoS2 mass fraction in soybean oil-based nanofluids, the increase in nanofluid viscosity leads to improved lubricating property. However, excessive mass fraction will result in nanoparticle agglomeration and will break the lubricating property. In the experiment, 6% mass fraction was identified to be the optimal addition concentration for molybdenum disulfide nanoparticles.

Dongzhou Jia - One of the best experts on this subject based on the ideXlab platform.

  • process parameter optimization and experimental evaluation for nanofluid mql in grinding ti 6al 4v based on grey relational analysis
    Materials and Manufacturing Processes, 2018
    Co-Authors: Guotao Liu, Dongzhou Jia, Yanbi Zhang, Mi Yang, Xianpeng Zhang, Shuming Guo, Ha Zhai
    Abstract:

    ABSTRACTNanofluid minimum quantity Lubrication is an environmental-friendly, resource-saving, and sustainable process compared with traditional Flood Lubrication. Especially, it is widely applied i...

  • Experimental research on the energy ratio coefficient and specific grinding energy in nanoparticle jet MQL grinding
    The International Journal of Advanced Manufacturing Technology, 2015
    Co-Authors: Dongkun Zhang, Yanbin Zhang, Dongzhou Jia, Xiaowei Zhang
    Abstract:

    Nanoparticles are solid nanoscale particles with features such as antiwear, antifriction, and high load-carrying capacity. This research applied nanoparticles in the cooling Lubrication of grinding and theoretically analyzed the impact of cooling Lubrication on the grinding surface through the energy ratio coefficient and specific grinding energy. First, the workpiece surface temperature was measured using a thermal infrared imager. A three-dimensional dynamometer was used to identify the tangential grinding force during grinding. Results showed that, with different cooling Lubrication approaches, the grinding surface was distributed to workpiece, grinding wheel, grinding fluid, and abrasive debris according to different energy ratio coefficients. The calculation demonstrated that the energy ratio coefficient of dry grinding reached 64.3 %. However, the energy ratio coefficient of Flood Lubrication, minimal quantities of lubricant (MQL), and nanoparticle jet MQL was 36.8, 52.1, and 41.4 %, respectively. These findings indicated that nanoparticle jet MQL realized a cooling effect close to that of Flood Lubrication. The specific grinding energy of nanoparticle jet MQL was 35 J/mm3, which was close to that of Flood Lubrication at 29.8 J/mm3. This finding indicated that the Lubrication effects of nanoparticle jet MQL were also similar to those of Flood Lubrication. Moreover, molybdenum disulfide, carbon nanotube (CNT), and zirconium oxide nanoparticles were added in the grinding fluid to conduct the grinding experiment with nanoparticle jet MQL. The comparison of energy ratio coefficients showed that the cooling performance of CNT nanoparticles was satisfactory. CNT nanoparticles were subsequently added into the grinding fluid at the volume concentrations of 1, 2, and 3 % for the grinding experiment. The results showed that the best cooling effects occurred under the 2 % volume concentration of CNT nanoparticles. Through rounds of selections and optimizations, our research acquired the nanoparticle types and volume concentration that had satisfactory cooling effects and should therefore be added in the grinding fluid.

  • Experimental evaluation of MoS2 nanoparticles in jet MQL grinding with different types of vegetable oil as base oil
    Journal of Cleaner Production, 2015
    Co-Authors: Yanbin Zhang, Changhe Li, Dongkun Zhang, Dongzhou Jia, Xiaowei Zhang
    Abstract:

    In consideration of the combined present research situation of vegetable oil as minimum quantity Lubrication (MQL) base oil domestically and abroad, the lubricating property of soybean oil, palm oil, and rapeseed oil as base oil in comparison with liquid paraffin was explored. In the experiment, a numerical control precision surface grinder was used for plain grinding on a 45 steel workpiece. The effect of adding MoS2 nanoparticle with a particle size of 50 nm was studied. Four types of grinding working conditions were applied: dry grinding, Flood Lubrication (5% water-soluble grinding fluid), MQL (base oil, including three types of vegetable oils and liquid paraffin), and nanoparticle jet MQL (containing nanoparticles at different concentrations). Grinding force, particle size, viscosity of nanofluids, and workpiece surface roughness were measured. The experimental results indicate that palm oil-based nanofluids added with MoS2 nanoparticles produce the best lubricating property in the nanoparticle jet MQL condition because of the high saturated fatty acid and high film-forming property of carboxyl groups in palm oil. As viscosity has a different effect on lubricating performance and heat transfer performance, high viscosity of nanofluids significantly reduced heat transfer performance while enhancing Lubrication performance. In consideration of the lubricating property and heat transfer performance, the best choice of base oil is soybean oil, which has the lowest viscosity. With the improvement of MoS2 mass fraction in soybean oil-based nanofluids, the increase in nanofluid viscosity leads to improved lubricating property. However, excessive mass fraction will result in nanoparticle agglomeration and will break the lubricating property. In the experiment, 6% mass fraction was identified to be the optimal addition concentration for molybdenum disulfide nanoparticles.

Dongkun Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Experimental research on the energy ratio coefficient and specific grinding energy in nanoparticle jet MQL grinding
    The International Journal of Advanced Manufacturing Technology, 2015
    Co-Authors: Dongkun Zhang, Yanbin Zhang, Dongzhou Jia, Xiaowei Zhang
    Abstract:

    Nanoparticles are solid nanoscale particles with features such as antiwear, antifriction, and high load-carrying capacity. This research applied nanoparticles in the cooling Lubrication of grinding and theoretically analyzed the impact of cooling Lubrication on the grinding surface through the energy ratio coefficient and specific grinding energy. First, the workpiece surface temperature was measured using a thermal infrared imager. A three-dimensional dynamometer was used to identify the tangential grinding force during grinding. Results showed that, with different cooling Lubrication approaches, the grinding surface was distributed to workpiece, grinding wheel, grinding fluid, and abrasive debris according to different energy ratio coefficients. The calculation demonstrated that the energy ratio coefficient of dry grinding reached 64.3 %. However, the energy ratio coefficient of Flood Lubrication, minimal quantities of lubricant (MQL), and nanoparticle jet MQL was 36.8, 52.1, and 41.4 %, respectively. These findings indicated that nanoparticle jet MQL realized a cooling effect close to that of Flood Lubrication. The specific grinding energy of nanoparticle jet MQL was 35 J/mm3, which was close to that of Flood Lubrication at 29.8 J/mm3. This finding indicated that the Lubrication effects of nanoparticle jet MQL were also similar to those of Flood Lubrication. Moreover, molybdenum disulfide, carbon nanotube (CNT), and zirconium oxide nanoparticles were added in the grinding fluid to conduct the grinding experiment with nanoparticle jet MQL. The comparison of energy ratio coefficients showed that the cooling performance of CNT nanoparticles was satisfactory. CNT nanoparticles were subsequently added into the grinding fluid at the volume concentrations of 1, 2, and 3 % for the grinding experiment. The results showed that the best cooling effects occurred under the 2 % volume concentration of CNT nanoparticles. Through rounds of selections and optimizations, our research acquired the nanoparticle types and volume concentration that had satisfactory cooling effects and should therefore be added in the grinding fluid.

  • Experimental evaluation of MoS2 nanoparticles in jet MQL grinding with different types of vegetable oil as base oil
    Journal of Cleaner Production, 2015
    Co-Authors: Yanbin Zhang, Changhe Li, Dongkun Zhang, Dongzhou Jia, Xiaowei Zhang
    Abstract:

    In consideration of the combined present research situation of vegetable oil as minimum quantity Lubrication (MQL) base oil domestically and abroad, the lubricating property of soybean oil, palm oil, and rapeseed oil as base oil in comparison with liquid paraffin was explored. In the experiment, a numerical control precision surface grinder was used for plain grinding on a 45 steel workpiece. The effect of adding MoS2 nanoparticle with a particle size of 50 nm was studied. Four types of grinding working conditions were applied: dry grinding, Flood Lubrication (5% water-soluble grinding fluid), MQL (base oil, including three types of vegetable oils and liquid paraffin), and nanoparticle jet MQL (containing nanoparticles at different concentrations). Grinding force, particle size, viscosity of nanofluids, and workpiece surface roughness were measured. The experimental results indicate that palm oil-based nanofluids added with MoS2 nanoparticles produce the best lubricating property in the nanoparticle jet MQL condition because of the high saturated fatty acid and high film-forming property of carboxyl groups in palm oil. As viscosity has a different effect on lubricating performance and heat transfer performance, high viscosity of nanofluids significantly reduced heat transfer performance while enhancing Lubrication performance. In consideration of the lubricating property and heat transfer performance, the best choice of base oil is soybean oil, which has the lowest viscosity. With the improvement of MoS2 mass fraction in soybean oil-based nanofluids, the increase in nanofluid viscosity leads to improved lubricating property. However, excessive mass fraction will result in nanoparticle agglomeration and will break the lubricating property. In the experiment, 6% mass fraction was identified to be the optimal addition concentration for molybdenum disulfide nanoparticles.

Amit Rai Dixit - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Minimum Quantity Lubrication (MQL) in machining processes using conventional and nanofluid based cutting fluids: A comprehensive review
    Journal of Cleaner Production, 2016
    Co-Authors: Anuj Kumar Sharma, Arun Kumar Tiwari, Amit Rai Dixit
    Abstract:

    Abstract In any metal cutting operation, the cutting fluid plays a vital role by cooling the surface of the work piece and the cutting tool, removing chips from the cutting zone and by lubricating the tool–work piece interface. However, misuse of the cutting fluid and wrong methods of its disposal can affect human health and the environment badly. Also, it accounts for 16–20% of the total cost of manufacturing in the production industry. Among various techniques available on application of the coolant, researchers, of late, have been focussing on Near Dry Machining (NDM)/Minimum Quantity Lubrication (MQL) as it minimizes the use of coolant by spraying the mixture of compressed air and cutting fluid in an optimized manner instead of Flood cooling. The MQL technique has proved to be suitable because it complies with the requirements of ‘green’ machining. This paper presents a review of the important research papers published regarding the MQL-based application of mineral oils, vegetable oils and nanofluid-based cutting fluids for different machining processes, such as, drilling, turning, milling and grinding, etc. The paper explains the mechanism of the MQL technique. In a systematic manner, the present work also discusses its effect on the performance parameters of different machining processes. Most of the experimental studies have shown that application of MQL produces surface better than dry machining and similar to that as produced under wet machining. Its application also reduces cutting forces, cutting zone temperature, tool wear, friction coefficient in comparison to dry and wet machining. Therefore, MQL technique has proved to be a viable alternative to the Flood Lubrication under similar performance parameters.