• Title/Summary/Keyword: 비연삭에너지

Search Result 19, Processing Time 0.026 seconds

Characteristics of specific grinding energy depending on grain size (연삭입자크기에 따른 비연삭에너지 특성)

  • Lee H.G.;Lee Y.M.;Yang S.H.;Bae D.W.;Kim H.K.
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 2005.05a
    • /
    • pp.319-323
    • /
    • 2005
  • As a new approach to analyze grinding energy, this paper introduces a specific grinding energy model based on the average grain. Using this model, grinding characteristics such as specific grinding energy of SM45C were investigated with changing variables such as grain size, workpiece velocity(v) and apparent depth of cut(Z) in down-surface grinding. From the experimental results, the specific grinding energy decreases as the maximum undeformed chip thickness increases. And also the specific grinding energy increases as the grit size increases.

  • PDF

Characteristics of specific grinding energy depending on grain sire of CBN (CBN 연삭입자 크기에 따른 비연삭에너지 특성)

  • Lee Y.M.;Bae D.W.;Lee H.G.;Jang J.H.;Hwang K.S.;Son S.P.
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2005.10a
    • /
    • pp.1004-1007
    • /
    • 2005
  • As a new approach to analyze grinding energy, this paper introduces a specific grinding energy model based on the average grain. Using this model, grinding characteristics such as specific grinding energy of SM45C were investigated with changing variables such as grain size of CBN, workpiece velocity(v) and apparent depth of cut(Z) in down-surface grinding. From the experimental results, the specific grinding energy decreases as the maximum undeformed chip thickness increases.

  • PDF

Analysis of Specific Grinding Energy Characteristics Using Average Grain Model (평균입자모델을 이용한 비연삭에너지 특성평가)

  • 이영문;최원식;장승일;배대원;손정우;이현구
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 2004.10a
    • /
    • pp.16-21
    • /
    • 2004
  • As a new approach to analyze grinding energy, this paper introduces a specific grinding energy model based on the average grain. Using this model, grinding characteristics such as radial and tangential forces, specific grinding energy of SM45C were investigated altering grinding variables such as workpiece velocity(v) and apparent depth of cut(Z) in down-surface grinding. From the experimental results, there is no significant difference between the radial, tangential forces and vertical. horizontal forces because of small contact angle between wheel and workpiece. The specific grinding energy decreases as the maximum undeformed chip thickness increases. But, there is much difference between the specific grinding energies of the existing and the proposed model.

  • PDF

Analysis of specific grinding energy using average grain model (평균입자모델을 이용한 비연삭에너지 해석)

  • Lee Young Moon;Choi Won Sik;Chang Sung Il;Bae Dae Won;Son Jeong Woo;Lee Hyun Goo
    • Transactions of the Korean Society of Machine Tool Engineers
    • /
    • v.14 no.4
    • /
    • pp.61-68
    • /
    • 2005
  • As a new approach to analyze grinding energy, this paper introduces a specific grinding energy model based on the average grain. Using this model, grinding characteristics such as radial and tangential forces, specific grinding energy of SM45C were investigated with changing grinding variables such as workpiece velocity(v) and apparent depth of cut(Z) in down-surface grinding. From the experimental results, the specific grinding energy decreases as the maximum undeformed chip thickness increases. And there is no significant difference between the specific grinding energies of the existing and the proposed model.

A Study on the Grinding of Titanium Alloy Part 1 : Grinding force, Specific grinding energy, Surface roughness, G-ratio (티타늄 합금의 연삭에 관한 연구 Part 1: 연삭력, 비연삭에저니, 표면거칠기 , 연삭비)

  • Kim, S. H.;Lim, J. G.;Ha, S. B.;Choi, H.;lee, J. C.
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2000.11a
    • /
    • pp.870-874
    • /
    • 2000
  • This investigation reports the grinding characteristics of titanium alloy(Ti-6Al-4V). Grinding experiments were performed at various grinding conditions and the grinding forces and specific grinding energies were measured to investigate the grindability of titanium alloy with the three different wheels including Diamond, Green carbide and Alumina. To investigate the grinding characteristics of titanium alloy grinding force, force-ratio, specific grinding energy and grinding -ratio, were measured. Surface roughness was also measured with tracer and the ground surfaces were observed with SEM. Force-ratio of grinding of titanium alloy was very lower than that of grinding of SKD-11. Specific grinding energy are almost five times larger and rougher surface was obtained in titanium grinding.

  • PDF

Effects of the maximum grit depth of cut on grinding characteristics (연삭가공특성에 미치는 연삭입자 최대물림깊이의 영향)

  • 허인호
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.8 no.5
    • /
    • pp.63-69
    • /
    • 1999
  • In tis study the effects of the maximum grit depth of cut on the grinding characteristics were investigated. They are AE signals produced during grinding processes have been studied to find out the appropriate AE parameters for assessing grinding processes. SM45C steel has been ground under the conditions yielding removal rate of workpiece 100, 200,300, and 400m{{{{ {m }^{3 } }}}}/min which was achieved by altering workpiece velocity(v) and apparent depth of cut(Z). According to the experimental result the value of surface roughness increases but grinding power energy rate of AE signal(AErmas2) and specific grinding energy consumed decrease as increasing the maximum grit depth of cut.

  • PDF

A Study on the Grinding Characteristics of Ceramics (구조용 세라믹스의 연삭특성에 관한 연구)

  • Ha, Sang-Baek;Jeon, Young-Kil;Choi, Whan;Lee, Jong-Chan
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.16 no.10
    • /
    • pp.182-186
    • /
    • 1999
  • Structural ceramics such as $Al_2O_3$, SIC, and $Si_3N_4$ are difficult to grind materials because of their high hardness and brittleness. They are normally ground in brittle mode, but it is possible to be ground in ductile mode depending upon the grinding conditions. In this paper an experimental investigation has been carried out to see the relationship between the grinding energy and grinding mode. It has been found that the ductile mode grinding consumes more grinding energy than the brittle mode grinding. Thus, the grinding conditions of the higher specific grinding energy leads to the plastic deformation in the ground surface of workpiece and results in the better surface finish.

  • PDF

A Study on the Surface Grinding Characteristic of Engineering Cramics (엔지니어링 세라믹스의 평면 연삭 가공 특성에 관한 연구)

  • Kang, J.H.;Heo, S.J.;Kim, W.L.
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.2 no.6
    • /
    • pp.38-49
    • /
    • 1994
  • In this study, grindability of some representative engineering ceramics are experimentally investigated using resin bond diamond wheel with conventional surface grinding machine, and proper grinding conditions which can be obtained from various experimental results are established also for mechanical components which are proper to domestic circumstances with high reliability. And through the results of experiment, it is confirmed that grinding energies of the ceramics, especially in the case of $Al_2O_3$, are lower than steel with same machining condition in the conventional grinding because of their fine-brittle fracture mode type removal process, though the ceramics are well-known to unmachinable materials. And moreover, the total pass numbers needed for spark-out process to be completed are depend on their mechanical properties because that grinding stiffness is different from each other. The grinding force, ginding power and ground surface roughness are also measured and compared. Furthermore, the experiments carried out in this study, some useful results are obtained with can guide to grind engineering ceramics with conventional surface grinding machine.

  • PDF

A Study on the Surface Grinding Machining Characteristics of FC200 Material (FC200 소재의 평면연삭 가공특성에 관한 연구)

  • Yang, Dong-Ho;Lee, Sang-Hyeop;Cha, Seung-Hwan;Lee, Jong-Chan
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.21 no.6
    • /
    • pp.36-43
    • /
    • 2022
  • Automobile brake discs are a major part of automobiles that are directly related to driver safety, and prevention of judder and squall noise is very important. This phenomenon occurs for complex reasons such as the precision and assembly of the brake module, and the material of the brake disc. The purpose of this study is to analyze the effect of the grinding wheel's grain size on the grinding conditions when machining cast iron, the material of the brake disc, and to derive the optimal grinding conditions through this.

A Study on the Grinding Characteristics of the Quartz (Quartz의 연삭 특성에 관한 연구(I))

  • Im, Jong-Go;Ha, Sang-Baek;Choi, Hwan;Lee, Jong-Chan
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2000.05a
    • /
    • pp.870-873
    • /
    • 2000
  • This investigation reports the grinding characteristics of quartz. Grinding experiments were performed at various grinding conditions including wheel mesh, table speed and depth of cut. The grinding forces and specific grinding energies were measured to compare the grindability of quartz with those of structural ceramics such as A1$_2$O$_3$, SiC, Si$_3$N$_4$ and ZrO$_2$. Surface roughness was also measured with tracer and the ground surfaces were observed with SEM. The chip formation energy of quartz was about 6J/㎣, which is quite smaller than those of structural ceramics. Although plastic flows are occured in Si$_3$N$_4$ and ZrO$_2$, micro/macro cracks are occured in ground surface of quartz like in A1$_2$O$_3$ and SiC.

  • PDF