Forging and heading of hollow spur gear forms: an analysis and some experiments

Chitkara, N.R.; Bhutta, M.A.

doi:10.1016/s0020-7403(98)00092-7

Cited by 9 publications

(14 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The trends of all studies are similar except slip-line field analysis (Tomov et al, 1999). Neglecting the effect of pressure angle, the upper bound analysis done by Chitkara and Bhutta (1999) is also compared in that figure. Again, they said their results estimated by upper bound are lower than those observed experimentally towards the end of the deformation.…”

Section: A New Simplified Formula For Relative Forging Pressurementioning

confidence: 78%

“…They described filling of the die cavity is "fairly" satisfactory (gear teeth seem chamfered along the bottom edges) in their study. Complete filling of the die cavity increases relative forging pressure exponentially and due to that, the results of the suggested formula (Equation 15) are higher than Chitkara and Bhutta (1999).…”

Section: A New Simplified Formula For Relative Forging Pressurementioning

confidence: 92%

“…Upper bound analyses of spur gears have been presented previously (Sadeghi, 2003, Chitkara et al, 1999, Zadshakouyan et al, 2009, Rasaee, et al, 2013, Irani et al, 2014. In these studies, different kinematically admissible velocity fields that satisfy the boundary conditions (incompressibility, continuity, and velocity) have been chosen.…”

Section: Upper Bound Analysismentioning

confidence: 99%

“…In most of the studies, using the symmetry of the gear tooth, half of the teeth is considered as shown in Figure l. This segment is subdivided into different deformation zones. To simplify the model, a tapered straight line is assumed instead of the involute tooth profile (Sadeghi, 2003, Chitkara et al, 1999. In those studies, a half gear segment is basically divided into three zones of deformation.…”

Section: Upper Bound Analysismentioning

confidence: 99%

“…Grover and Juneja (1984) have analyzed the closed die spur gear forging assuming the tooth profile as a trapezoid. Chitkara and Bhutta (1999) modeled the deformation of gear-like parts using the upper bound method assuming the tooth profile as a straight line. Choi et al (1988Choi et al ( , 2000 presented mathematical models based on the upper bound method by assuming the tooth profile as a tapered line and an involute curve.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A simplified formula for determination of relative pressure in the precision forging of spur gears

Eyerci̇oğlu

Yilmaz

2021

JER is an international, peer-reviewed journal that publishes f

View full text Add to dashboard Cite

In this study, the relative forging pressures of spur gears were evaluated. The precision forging of spur gears was analyzed by using the upper bound method considering corner filling and bulging effect. Numerical and experimental studies were performed to investigate the effects of various parameters, such as the number of teeth, modules, facewidth, bore diameter, and friction factor on the relative forging pressure of spur gears. The results were compared with the previous studies and a simplified formula was suggested to predict the relative pressure of precision forging of spur gears. The predicted relative forging pressures obtained by the suggested formula are shown much closer to the experimental results for the complete filling of the die cavity.

show abstract

Section: A New Simplified Formula For Relative Forging Pressurementioning

confidence: 78%

Section: A New Simplified Formula For Relative Forging Pressurementioning

confidence: 92%

Section: Upper Bound Analysismentioning

confidence: 99%

Section: Upper Bound Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A simplified formula for determination of relative pressure in the precision forging of spur gears

Eyerci̇oğlu

Yilmaz

2021

JER is an international, peer-reviewed journal that publishes f

View full text Add to dashboard Cite

show abstract

Preform and forging process designs based on geometrical features using 2D and 3D FEM simulations

Sheu

2008

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Simulation study of the punching forming process and die wear of spur gears

Chen,

Guo,

Fang

et al. 2024

Int J Adv Manuf Technol

View full text Add to dashboard Cite

As an important transmission component, the spur gear has been widely used in automobiles and various mechanical equipment. However, spur gears are produced by the hobbing and shaving, which inevitably reduces the service strength and service life of the gear. In this paper, the punching forming process of spur gear is presented. Compared with the traditional gear machining process, the process not only avoids the destruction of the metal ow line and signi cantly improves the material utilization rate. The effect of tooth lling and equivalent strain accumulation on gear forming quality were discussed by nite element simulation. The effects of upper die punching speed, lower die preheating temperature and friction coe cient on lower die wear during forming were studied by response surface method. The optimum process parameters of punching of spur gear were lower die preheating temperature of 280℃, friction coe cient of 0.27, upper die feed speed of 8.3 mm/s, respectively.It is predicted that about 110,000 gears can be produced before the wear failure of the lower die. On the basis of the nite element simulation results, the gear punching test is carried out. The experimental results are in good agreement with the simulation results, and the metal ow line at the tooth is uniform and continuous, which veri es the reliability of the punching process. This study provides a feasible way for plastic forming of spur gear.

show abstract

Forging and heading of hollow spur gear forms: an analysis and some experiments

Cited by 9 publications

References 0 publications

A simplified formula for determination of relative pressure in the precision forging of spur gears

A simplified formula for determination of relative pressure in the precision forging of spur gears

Preform and forging process designs based on geometrical features using 2D and 3D FEM simulations

Simulation study of the punching forming process and die wear of spur gears

Contact Info

Product

Resources

About