Threading Performance of Different Coatings for High Speed Steel Tapping

Val, Alain Gil Del; Veiga, Fernando; Pereira, Octavio; Lacalle, Luis Norberto López de

doi:10.3390/coatings10050464

Cited by 18 publications

(10 citation statements)

References 20 publications

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“…The nanoparticles in the forming process were studied by the authors in [ 10 ], with a tremendous effect on the forming process of metal containers. All of these works and many others [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ] inspired the authors of the paper to thoroughly study the effect of polymers in a forming technology from several aspects. The selection resulted in the production of thread by forming taps.…”

Section: Introductionmentioning

confidence: 99%

Exquisite Energy Savings at Cold Metal Forming of Threads through the Application of Polymers

et al. 2022

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One of the global problems today is energy—its production and distribution. As the human population grows, the consumption of energy rises simultaneously. However, the natural sources are limited, and so the focus on power savings becomes more and more important. One of the ways to reduce consumption is the use of effective lubricants and tribological fluids in industry, especially in processes with high demands on energy but high quality of products as well. Forming is a typical example of such technology, and the application of polymers seems to be a very important challenge, because the application of straight oils or lubricant with extreme pressure additives seems to be prevailing in that field. Nevertheless, the polymer lubricant should fulfill all European standards as well as the environmental and ecological limitations with respect to health and the natural environment and its recycling and disposal. This paper is focused on the forming technology of threads and the application of selected polymers to the forming process. The measured and quantified criteria are torque and force loadings, energy consumption, and quality of the produced surfaces. Kistler dynamometers, scanning electron microscopy, and advanced surface topography with the use of Alicona IF-G5 were applied to assess all aspects of the tribological and energy aspects of six modern process fluids, three lubricating pastes, and two fluid modifications. The results show that the polymer synthetic lubricant (at volume concentration 20% in water) can reduce the total energy consumption by up to 40% per forming cycle (in mean values) at average surface roughness below 0.8 μm.

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Section: Introductionmentioning

confidence: 99%

Exquisite Energy Savings at Cold Metal Forming of Threads through the Application of Polymers

et al. 2022

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“…Tool coatings have proven to be quite an improvement in the machining process, especially in turning [21] and milling processes [22]; however, these can be applied to a wide variety of other metal-cutting processes, such as tapping, where the use of hard-coatings has provided a viable solution for tapping hard-to-machine materials by essentially improving tool life and cutting behavior [23,24]. These coatings directly impact the wear behavior and performance of cutting tools [25], lowering the produced surface roughness, sustaining wear, and even decreasing the cutting forces that are generated during the process [26,27].…”

Section: Introductionmentioning

confidence: 99%

Wear Behavior of Uncoated and Coated Tools in Milling Operations of AMPCO (Cu-Be) Alloy

et al. 2021

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Copper-Beryllium alloys have excellent wear resistance and high mechanical properties, they also possess good electrical and thermal conductivity, making these alloys very popular in a wide variety of industries, such as aerospace, in the fabrication of tools for hazardous environments and to produce injection molds and mold inserts. However, there are some problems in the processing of these alloys, particularly when these are subject to machining processes, causing tools to deteriorate quite rapidly, due to material adhesion to the tool’s surface, caused by the material’s ductile nature. An assessment of tool-wear after machining Cu-Be alloy AMPCOLOY 83 using coated and uncoated tools was performed, offering a comparison of the machining performance and wear behavior of solid-carbide uncoated and DLC/CrN multilayered coated end-mills with the same geometry. Multiple machining tests were conducted, varying the values for feed and cutting length. In the initial tests, cutting force values were registered. The material’s surface roughness was also evaluated and the cutting tools’ edges were subsequently analyzed, identifying the main wear mechanisms and how these developed during machining. The coated tools exhibited a better performance for shorter cutting lengths, producing a lower degree of roughness on the surface on the machined material. The wear registered for these tools was less intense than that of uncoated tools, which suffered more adhesive and abrasive damage. However, it was observed that, for greater cutting lengths, the uncoated tool performed better in terms of surface roughness and sustained wear.

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“…Polvorosa et al [21] proposed a cuttingedge strategy based on cutting signals when tapping a hard to machine material. Finally, Gil Del Val et al [22] studied the wear evolution of conical and cylindrical teeth when tapping nodular cast iron at high speed conditions.…”

Section: Introductionmentioning

confidence: 99%

Oversizing Thread Diagnosis in Tapping Operation

Val¹,

Veiga²,

Penalva³

et al. 2021

Metals

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Automotive, railway and aerospace sectors require a high level of quality on the thread profiles in their manufacturing systems knowing that the tapping process is a complex manufacturing process and the last operation in a manufacturing cell. Therefore, a multivariate statistical process control chart, for each tap, is presented based on the principal components of the torque signal directly measured from spindle motor drive to diagnosis the thread profile quality. This on-line multivariate control chart has implemented an alarm to avoid defected screw threads (oversized). Therefore, it could work automatically without any operator intervention assessing the thread quality and the safety is guaranteed during the tapping process.

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Threading Performance of Different Coatings for High Speed Steel Tapping

Cited by 18 publications

References 20 publications

Exquisite Energy Savings at Cold Metal Forming of Threads through the Application of Polymers

Exquisite Energy Savings at Cold Metal Forming of Threads through the Application of Polymers

Wear Behavior of Uncoated and Coated Tools in Milling Operations of AMPCO (Cu-Be) Alloy

Oversizing Thread Diagnosis in Tapping Operation

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