Experimental and theoretical study on workpiece temperature when tapping hardened AISI H13 using different cooling systems

Brandão, Lincoln Cardoso; Coelho, Reginaldo Teixeira; Malavolta, Alexandre Tácito

doi:10.1590/s1678-58782010000200008

Cited by 15 publications

(9 citation statements)

References 12 publications

(5 reference statements)

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“…In their experimental tests, the efficiency in reducing these forces could be noted when the cutting fluid was used. Brandão and Coelho 21 studied threading with the removal of material applied to AISI H13 hardened steel with different lubrication systems and showed that there is a significant temperature increase if cutting speed is increased also. The temperature was monitored with the use of thermocouples inserted in the specimens, which obtained measurements of the heat generation created by the process and the cooling rate of the systems used in it.…”

Section: Discussionmentioning

confidence: 99%

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Performance evaluation of tapping processes using a 7075 aluminium alloy with different cooling systems and threading heads

Coelho

Pereira

Lauro

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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Modern industry faces a great challenge: the production of consumer goods based on a triangle comprising low costs, low production time and high quality. The optimisation of modern manufacturing processes should seek not only the reduction of manufacturing time but also the reduction of mineral resources and electric energy consumption. In the context of metalworking, considering tapping processes, studies on the use of minimum quantity of lubricant are minimal and scarce. Hence, this study deals with the application of minimum quantity of lubricant and emulsion to the processes of form and machine tapping. To this end, 7075-T651 aluminium alloy workpieces were threaded using both tapping processes at three cutting/forming speeds. M10 threads with a pitch of 1.5 mm were considered the standard profile. Torque and thrust force were monitored, and three threading heads were employed in the experimental tapping tests. According to the results, it can be concluded that the best option was to use minimum quantity of lubricant in order to reduce environmental impact, given its efficient disposal of fluids and compatibility with Softsynchro threading heads, which kept both torque and axial force close to the mean values. Furthermore, this threading head model was also the best for reducing the manufacturing time of the threads.

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Section: Discussionmentioning

confidence: 99%

“…Brandão et al. 21 studied the heat flux in the machine tapping of hardened steels. The authors monitored the temperature through embedded thermocouples in the workpieces, and the results obtained by the authors demonstrate that the temperature in the tapping process increases proportionally with the increase of cutting speed.…”

Section: Discussionmentioning

confidence: 99%

Performance evaluation of tapping processes using a 7075 aluminium alloy with different cooling systems and threading heads

Coelho

Pereira

Lauro

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The effects of various tap design parameters and tapping conditions on the formation of split crests were investigated to arrive at an optimal tap design. In addition to these studies, studies such as high-accuracy classi cation of thread quality in tapping processes [15], fatigue analysis of threaded connections using the local strain approach [16], use of the coolant [17] are available in the literature. In addition, nite element analysis and cutting zone temperatures are also among the subjects investigated [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Finite element simulation of stresses in cutting tools during tapping

Demirel

Yağmur

Kayir

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Tapping is inherently more complex than other machining processes. The main reason for this complexity is that the chip removal process takes place in a closed environment. For this reason, in order to use the tap tools more efficiently, it is necessary to know the cutting conditions and the stresses that occur in the tool during cutting. In this study, holes of different diameters were drilled in the AISI 1050 material and threaded with M10 taps with three different geometries. Uncoated HSS and TiN coated HSS taps were used in the study. The tapping operations were carried out in dry conditions. The simulation conditions were chosen exactly the same as the experimental conditions. Stresses during tapping were analyzed using the Third Wave AdvantEdge program based on the finite element method (FEM). The tapping tools were modeled by reverse engineering method and then imported in the program. In general, the coating applied to the tools positively affected the stresses on the cutting tool.

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“…The second method that can diminish the amount of cutting fluid in the machining process is the use of minimum quantities of lubricant. Brandão et al [13] show that the effects of heat can be minimized with the use of cooling with a minimum quantity of lubricant. The finite element analysis shows that this system has the same ability to remove heat from the machining process with a smaller amount of cutting fluid.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Hole Quality in Hardened Steel with High-Speed Drilling Using Different Cooling Systems

Brandão

Neves

Nocelli

2011

Advances in Mechanical Engineering

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This work evaluates the hole quality on AISI H13 hardened steel using high-speed drilling. Specimens were machined with new and worn out drills with 8.6 mm diameter and (TiAl)N coating. Two levels of cutting speed and three levels of cooling/lubrication systems (flooded, minimum lubrication quantity, and dry) were used. The hole quality is evaluated on surface roughness (Ra) parameter, diameter error, circularity, and cylindricity error. A statistical analysis of the results shows that the cooling/lubrication system significantly affects the hole quality for all measured variables. This analysis indicates that dry machining produces the worst results. Higher cutting speeds not only prove beneficial to diameter error and circularity errors, but also show no significant difference on surface roughness and cylindricity errors. The effects of the interaction between the cooling/lubrication systems, tool wear, and cutting speed indicate that only cylindricity error is influenced. Thus, the conclusion is that the best hole quality is produced with a higher cutting speed using flooded or minimum lubrication quantity independent of drill wear.

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Experimental and theoretical study on workpiece temperature when tapping hardened AISI H13 using different cooling systems

Cited by 15 publications

References 12 publications

Performance evaluation of tapping processes using a 7075 aluminium alloy with different cooling systems and threading heads

Performance evaluation of tapping processes using a 7075 aluminium alloy with different cooling systems and threading heads

Finite element simulation of stresses in cutting tools during tapping

Evaluation of Hole Quality in Hardened Steel with High-Speed Drilling Using Different Cooling Systems

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