Force modeling and machining characteristics of the intermittent grinding wheels

Kwak, Jae-Seob; Ha, MyungShin

doi:10.1007/bf03185218

Cited by 20 publications

(9 citation statements)

References 6 publications

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“…For an intermittent dress grinding process [11], the interaction between the grinding wheel and the workpiece is cyclic. In this case the local heat transfer coefficient bðt; xÞ and the surface heat flux dðt; xÞ were given in [3] in terms of the Heaviside step function H [12] bðt; xÞ ¼ aH ðÀxÞ þ aH ðx À dÞ þ a s H ðd À xÞH ðxÞf s ðtÞ þaH ðd À xÞH ðxÞf e ðtÞ;…”

Section: Numerical Methods Formulaementioning

confidence: 99%

Heat transfer analysis of intermittent grinding processes

Pérez

Hoyas

Скуратов

et al. 2008

International Journal of Heat and Mass Transfer

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Section: Numerical Methods Formulaementioning

confidence: 99%

Heat transfer analysis of intermittent grinding processes

Pérez

Hoyas

Скуратов

et al. 2008

International Journal of Heat and Mass Transfer

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“…So, the proper use of coolant and its application are indispensable to cool the workpiece and avoid thermal damages [14]. Nevertheless, Kwak and Ha [15] demonstrated that grinding by interrupted cutting (grinding wheel with grooves) is a promising method to decrease workpiece thermal damages due to the excellent cooling effect of the process. According to Pérez et al [16], the explanation is based on the grooves, since they provide direct and enough amount of cutting fluid in the cutting zone.…”

Section: Grinding Process Cooling In Interrupted Cuttingmentioning

confidence: 99%

Contribution to cylindrical grinding of interrupted surfaces of hardened steel with medium grit wheel

Mello

Rodriguez

et al. 2018

Int J Adv Manuf Technol

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Grinding is generally the first choice to provide combination of both superior surface finish and closer dimensional tolerances in a machined component. This process can be employed in manufacturing of continuous and interrupted surfaces. Crankshafts and engine piston rings are examples of ground precision mechanical components having interrupted surfaces. However, the specific literature about grinding of interrupted surfaces is still scarce. In this context, aiming to further contribute to the understanding of the behavior of surface integrity of interrupted surfaces during grinding, this paper presents an experimental investigation of interrupted surfaces ground with white aluminum oxide grinding wheel. Discs of AISI 4340 hardened steel with different number of grooves (2, 6, and 12) on the external surface were tested. Experiments with discs without interrupted surface were also carried out for comparisons. In addition to the number of grooves, three values of infeed rate (0.25, 0.50, and 0.75 mm/min) were used as input parameters. The output parameters investigated were the geometric errors (surface roughness and roundness) of the workpiece material as well as the diametric wheel wear. Analysis of variance (ANOVA) test was performed to verify any statistical difference among the output variables. Results showed that both surface finish and roundness of workpieces with interrupted surfaces were higher than those obtained for continuous surface. These parameters also increased with infeed rate up to 0.50 mm/min, whereas the grinding wheel wear was more sensitive to number of grooves and infeed rate. No thermal damages were observed on the machined workpieces under the conditions investigated.

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“…19 With the results of the experiments with conventional and intermittent wheels, it was proven that the intermittent wheel appeared to be superior in various aspects such as the grinding force, the temperature and the geometric error, showing little deterioration of the surface roughness. Tawakoli and Azarhoushang 20 investigated the feasibility of intermittent grinding with a segmented wheel, using two ceramic-matrix composite materials.…”

Section: Introductionmentioning

confidence: 96%

Effects of various helically angled grinding wheels on the surface roughness and roundness in grinding cylindrical surfaces

Gavas¹,

Kina²,

Köklü³

2015

Mater. Tehnol.

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Grinding is generally used in the final step of machining metallic materials to achieve the necessary surface quality and dimensions. Grinding wheels with flat surfaces are commonly used in the process of grinding. However, due to the fact that there is a great deal of contact length (corresponding to the grinding-wheel width) between the grinding wheel and the workpiece, effective cooling during the grinding process may not be possible and, consequently, the heat in the deformation region is increased. Due to these reasons, some undesired results such as an unqualified surface and a roundness error take place. Various profiles of the grinding wheel were, therefore, proposed to improve the surface quality and decrease the roundness error by modifying the grinding wheel and developing various methods. In this study, AISI 1050, AISI 4140 and AISI 7131 steel materials were subjected to the cylindrical-grinding process using wheels helically grooved at 15°, 30°and 45°and the obtained results such as the average surface roughness and roundness errors were compared with the results of the flat-surface grinding wheels. The experimental results show that the surface roughness and roundness error are reduced when using a helically grooved grinding wheel and, thus, the quality of the machined parts is improved. Keywords: cylindrical grinding, helically grooved grinding wheel, roundness error, surface roughness Bru{enje se navadno uporablja kot kon~na stopnja obdelave kovinskih materialov za zagotovitev kvalitete povr{ine in mer. Pri postopku bru{enja se navadno uporabljajo brusni koluti z ravno povr{ino. Vendar pa je zaradi velike kontakne dol`ine (odvisno od {irine brusilnega koluta) med brusilnim kolutom in obdelovancem ote`eno u~inkovito ohlajanje, zato se podro~je deformacije ogreva. Lahko se pojavijo ne`eleni rezultati, kot so neustrezna povr{ina in napaka okroglosti. Za izbolj{anje kvalitete povr{ine in zmanj{anje napak okroglosti so predlagani modificirani brusilni koluti z razli~nimi profili in razli~ne metode. V tej {tudiji so bila jekla AISI 1050, AISI 4140 in AISI 7131 okroglo bru{ena s koluti z vija~nim utorom 15°, 30°in 45°. Dobljeni rezultati, kot sta povpre~na hrapavost povr{ine in napaka okroglosti, so bili primerjani s tistimi, dobljenimi z brusilnimi koluti z ravno povr{ino. Rezultati ka`ejo, da se povr{inska hrapavost in napaka okroglosti zmanj{ujeta pri uporabi brusilnih kolutov z vija~nim utorom, torej se kvaliteta strojnih delov izbolj{a. Klju~ne besede: okroglo bru{enje, brusni kolut z vija~nim utorom, napaka okroglosti, hrapavost povr{ine

show abstract

Force modeling and machining characteristics of the intermittent grinding wheels

Cited by 20 publications

References 6 publications

Heat transfer analysis of intermittent grinding processes

Heat transfer analysis of intermittent grinding processes

Contribution to cylindrical grinding of interrupted surfaces of hardened steel with medium grit wheel

Effects of various helically angled grinding wheels on the surface roughness and roundness in grinding cylindrical surfaces

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