Green manufacturing process for helical pinion gear using cold extrusion process

Jeong, Myeong-Sik; Lee, Sang-Kon; Yun, Jeong-Hwan; Sung, Ji Hyun; Kim, Da Hye; Lee, Shinok; Choi, Tae Hoon

doi:10.1007/s12541-013-0134-7

Cited by 33 publications

(12 citation statements)

References 7 publications

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“…dv 0 The volume swept by tooth surface around by driving gear. dv 1 The volume swept by tooth surface around by driven gear. dφ 0 The rotate angle of driving gear.…”

Section: Discussionmentioning

confidence: 99%

“…The ultimate goal is the sustainable development and environmental releases for manufacturing industry. Gears and subsequently the gear manufacturing industry play an integral role in many industrial segments, as it supplies one of the basic mechanical components for transmission of motion and (/or) power to keep machines, instruments, and equipment operational [1].…”

Section: Introductionmentioning

confidence: 99%

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Development of a micropump composed of three gears with Logix tooth profiles fabricated by micromilling technology

Shi

Zhao

Wan

et al. 2017

Int J Adv Manuf Technol

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Sustainability is a growing interest for industry to integrating and assessing social, environmental, and economic objectives. Involute gear and single-pump feed technology are difficult to satisfy the requirements of sustainability for highhomogeneous medium and low-loss situations. To improve the relative displacement and reduce the volume of the pump, an innovative three-gear micropump was designed. The gears were patterned with Logix tooth profiles which have lower undercutting tendency and are easy to design with a reduced number of teeth. The double-pump confluence technology was used to reduce the flow pulsation based on phase compensation. In this paper, the structural parameters of Logix gear were first calculated through mathematical analysis. Then, a micropump composed of three Logix gears was designed based on the selected parameters and double-pump confluence technology. The Logix gear was manufactured by micromilling experiments, and the three-gear pump was assembled. At last, a pressure fluctuation test platform was implemented to investigate the fluctuation of the three-gear pump and the transmission noise. Results showed that the displacement of the three-gear micropump was doubled compared with the conventional involute gear pump, with 50% flow pulsation reduction. The transmission noise of the Logix gear pump was also reduced. The outcome of this research will contribute to the development of simplified, safer and anti-fuel-burning gear pump systems, and environment-friendly and sustainable manufacturing of such systems.

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“…dv 0 The volume swept by tooth surface around by driving gear. dv 1 The volume swept by tooth surface around by driven gear. dφ 0 The rotate angle of driving gear.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of a micropump composed of three gears with Logix tooth profiles fabricated by micromilling technology

Shi

Zhao

Wan

et al. 2017

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Pinions and splined shafts with small modules have been manufactured by extrusion technique [15,16]. Open-die warm extrusion technique is a combination of the warm forming and the extrusion process, which has a series of obvious advantages: (1) compared with hot forming, this technology can effectively reduce the metal oxidation and decarburization and prevent overheating, overburning, and grain growth, (2) compared with cold forming, this technology can manufacture large module gears and avoid material cracking, and (3) compared with gear forging process, this technology needs smaller forming load so that it can overcome the premature die failure [17,18].…”

Section: Introductionmentioning

confidence: 99%

Application of Open-die Warm Extrusion Technique in Spur Gear Manufacturing

Wang¹,

Zhao²

2018

Extrusion of Metals, Polymers and Food Products

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The open-die warm extrusion technique is recommended for spur gear manufacturing. This forming technique is systematically researched by using numerical simulation analysis and physical experiments. The lubricating condition, entrance angle, and initial blank size are determined as the crucial factors on the forming quality. The influence of each factor on this technology is fully understood and ascertained. The reasons for causing the forming defect in insufficient sections are analyzed and the die structure and extrusion speed are optimized by using the response surface method (RSM) for defects control and improving the forming quality. Furthermore, the improved process, "Variable Contour Two-Step Warm Extrusion," is presented in order to obtain good forming results in a poor lubricating condition.

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“…High accuracy, productivity, and the capability in gear manufacturing have been receiving significant attentions [2]. Conventional machining processes for manufacturing gears can meet the requirement of accuracy, but it has low productivity with material wastes, and the strength and fatigue life of machined gears are lower than those of the gears produced through forging processes [2]. Forged gears have been presented as having the advantages of high-strength teeth [3], high productivity, and low-power dissipation [4].…”

Section: Introductionmentioning

confidence: 99%

An investigation of involute and lead deflection in hot precision forging of gears

Zuo

Wang

Zhi

et al. 2016

Int J Adv Manuf Technol

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A theoretical model is presented in the paper for predicting involute profile deflection in hot precision forging of gears. This model is a function of a number of material and processing parameters, including the thermal expansion of the die, thermal contraction of workpiece, elastic expansion of the die during forging, and workpiece recovery after ejection. To improve the accuracy of the hot forged gear tooth, an equation set to define modified involute that is used to design the die tooth has been proposed based on the model. The distribution of deflection along the involute was also predicted using the commercial FE code, PRO-E. The deflection characteristic of the toothed die through the tooth width was analyzed by combining the theoretical method and FEM to investigate the nonuniform deflection. The dimension of the forged gears was measured using a gear measurement machine WGT3000. A close agreement between predicted and measured tooth involute profiles was obtained, which validated the involute deflection prediction model. The measured lead error also verified the model for deflection non-uniformity through the tooth width. The results can provide a guide for die tooth designs to improve the dimensional accuracy of hot forged gear teeth.

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Green manufacturing process for helical pinion gear using cold extrusion process

Cited by 33 publications

References 7 publications

Development of a micropump composed of three gears with Logix tooth profiles fabricated by micromilling technology

Development of a micropump composed of three gears with Logix tooth profiles fabricated by micromilling technology

Application of Open-die Warm Extrusion Technique in Spur Gear Manufacturing

An investigation of involute and lead deflection in hot precision forging of gears

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