Method of Preventing Cutting Edge Failure of Hob Due to Chip Crush

Komori, Masaharu; Sumi, Masaoki; Kubo, Akiharu

doi:10.1299/jsmec.47.1140

Cited by 12 publications

(3 citation statements)

References 4 publications

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“…On the other hand, through visual evidence to hobbed gear surface, the scratch marks as shown in Fig. 3 were observed, which resulted from the interference behavior of chips stuck at tooth edge with hobbed gear surface [6,7]. The ratios of the scratched gears, where the scratch marks were verified at least at one tooth, with respect to all gears machined by one hob are 21/45 for Hob A1, 22/40 for Hob B1 and 7/20 for Hob C1, respectively.…”

Section: Results and Discussion Of Hobbing Experimentsmentioning

confidence: 99%

Cutting Performance of High Speed Steel Hobs with Different Coating in Dry Hobbing

Kubo

Qiu

2011

MSF

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This paper explains the results of a systematic dry hobbing experiment performed on a general mechanical transmission type of hobbing machine. The HSS hobs with different combinations of coat materials and coating states display significant variations in tool life. A TiN coating hob demonstrates the best cutting performance although the coating cost is the lowest. Furthermore, some meaningful discussions related to the dry hobbing mechanism are also presented.

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Section: Results and Discussion Of Hobbing Experimentsmentioning

confidence: 99%

Cutting Performance of High Speed Steel Hobs with Different Coating in Dry Hobbing

Kubo

Qiu

2011

MSF

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“…Among the numerous scientific papers devoted to this problem, several of them can be identified, in which the method and results of modelling the chip parameters in the hobbing process on the basis of 3D graphic reproduction of cutting element traces using CAD systems [1][2][3][4][5][6][7][8][9][10][11][12][13][14] are given. In these works, on the basis of the use of the possibilities of computer engineering graphics systems, the motion of the hob helical surface during rotation about its axis, as well as the cutting surface of a certain tooth, have been described.…”

Section: Review Of Modern Information Sourcesmentioning

confidence: 99%

Computer 3D modelling of chip geometry and force field in the hobbing process

Hrytsay¹,

Topchij²,

Kuk³

2018

Ukr. j. mech. eng. mater. sci.

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Nowadays, the main method of machining the gears with a module in the range 1-25 mm, which are integral parts of modern machines, remains hobbing. Operations of the toothed crown processing determine the efficiency of the entire technological process of manufacturing gears. Thus, the time expenses and performance, the cost of the gears, and their final quality depend to a large extent on these indicators in operations of hobbing. Considering the importance of this process for mechanical engineering, considerable attention of scientists is devoted to its modelling. Chip parameters are the key source of information required for comprehensive and complete analysis of the hobbing process. Despite the large number of publications devoted to this problem, there is still no methodology for adequate reproduction of these parameters. Known methods and models are characterized by significant simplifications and do not reproduce completely the kinematics of this complex process. This article presents a new approach to graphical modelling of the chip parameters in the hobbing process, which is based on the analysis and synthesis of elementary kinematic motions, related to unit motions and displacements of the hob cutting elements in the process of removing the metal in the gap between the teeth of the processed gear. The algorithm for forming the instantaneous transitional surface between the gear teeth and the threedimensional (3D) space geometry of the chips on all active teeth of the tool is implemented in the graphic system AutoCAD. The article presents the results of computer modelling of chips in the climb and up-cut hobbing with Archimedean and convoluted hobs. Complete information on the geometric structure of the cut layers provides the basis for complex and system modelling of this process at the level of separate racks, teeth and edge of a hob. In combination with the data on the intensity of plastic deformation, stresses and temperature obtained for the corresponding conditions of hobbing in the Deform system, data on the parameters of the cut layers create opportunities for predicting the heating and wear of cutting elements of a hob, their loading, strength of protective coatings, transient processes of the cutting force and temperature, designing of optimal technological processes of hobbing and management of these processes.

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“…Dry hobbing is a cost reduction and environmentally friendly technology, but it deteriorates the cutting condition. Nowadays, the single-tooth flying cutter is used to simulate the cutting force models and cutting process [1,2] and the cutting area is replaced by the area on the gear's cross-section [3,4] which will cause the distortion of the research result as the hobbing process is particularly different from the models.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Simulation on Cutting Morphology of Dry Hobbing

Zhou

Xie

et al. 2012

AMM

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As the cutting layer shape of hobbing has an important impact on hobbing force, temperature and tool life, this paper put forward the analysis on morphological structure of dry hobbing cutting. The research aim at the morphological shape of cutting layer, in order to give an accurate description, Solidworks is used in the process of cutting simulation and the simulation successfully show the shape of cutting layer. Then the mathematical description is used to plot two kind of geometry trajectory. The first is about the cutting edges project on the cross-section, and another is the interception lines between the cutting edges and the cylinder surface. The analysis showed that the simulation can get ideal cutting layer, and the layer is more intuitional and clear. Meanwhile, compared with the trajectory on radial section, the trajectory on cylinder surface can describe the cutting morphology more accurately and fitter with the real cutting condition.

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Method of Preventing Cutting Edge Failure of Hob Due to Chip Crush

Cited by 12 publications

References 4 publications

Cutting Performance of High Speed Steel Hobs with Different Coating in Dry Hobbing

Cutting Performance of High Speed Steel Hobs with Different Coating in Dry Hobbing

Computer 3D modelling of chip geometry and force field in the hobbing process

Analysis and Simulation on Cutting Morphology of Dry Hobbing

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