Thread Quality Control in High-Speed Tapping Cycles

Val, Alain Gil Del; Veiga, Fernando; Suárez, Alejandro Rosete; Arizmendi, M.

doi:10.3390/jmmp4010009

Cited by 8 publications

(5 citation statements)

References 20 publications

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“…The paper [44] shows the results of the comparison of different coatings for high-speed steel threading. A control system for assessing thread quality in high-speed tapping using the signal of the spindle motor torque is developed in [45]. The article [46] studies the on-machine measurement method of screw threads of sucker rods based on machine vision.…”

Section: Values Of Mechanical Properties Due To Strength Groups Ofmentioning

confidence: 99%

Analytical Model of Tapered Thread Made by Turning from Different Machinability Workpieces

Onysko,

Kopei,

Barz

et al. 2024

Machines

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High-precision tapered threads are widely used in hard-loaded mechanical joints, especially in the aggressive environment of the drilling of oil and gas wells. Therefore, they must be made of workable materials often difficult to machine. This requires the use of high-performance cutting tools, which means the application of non-zero geometric parameters: rake and edge inclination angles. This study is based on analytical geometry methodology and describes the theoretical function of the thread profile as convoluted surfaces dependent on the tool’s geometric angles. The experiments were conducted using a visual algorithm grounded on the obtained function and prove the practical use of the scientific result. They predict the required accuracy of thread made using a lathe tool with a rake angle of up to 12°.

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Section: Values Of Mechanical Properties Due To Strength Groups Ofmentioning

confidence: 99%

Analytical Model of Tapered Thread Made by Turning from Different Machinability Workpieces

Onysko,

Kopei,

Barz

et al. 2024

Machines

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“…An online monitoring and quality classification system tested with M10 size threads by using motor spindle currents and a statistical process control approach under laboratory conditions is shown in by Gil del Val et al in [5], whereas the validation of that system in an industrial environment is presented in [19]. Furthermore, Gil del Val et al could validate the monitoring system using the torque signal provided by the machine control [6]. Polvorosa et al [17] detected tap wear by measuring cutting force and torque with a commercially available sensor-integrated floating tap holder (see [14]).…”

Section: State Of the Artmentioning

confidence: 99%

“…The stiffness in z-axis direction is determined by the two pairs of polymer spring elements (6), which are also offset by 180 • . The floating tap holder allows a maximum stroke of the tapping tool of ± 1.5 mm.…”

Section: Floating Tap Holdermentioning

confidence: 99%

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Sensor-integrated tap holder for process uncertainty detection based on tool vibration and axial length compensation sensors

Öztürk¹,

Sarikaya²,

Weigold³

2021

Int J Adv Manuf Technol

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The tapping process is one of the most widespread manufacturing processes for internal threads, usually carried out at the end of the value chain. Any non-compliance with required quality standards or even the destruction of the thread due to process uncertainty in the tapping process is therefore subjected to high rework costs. Possible process uncertainties in the tapping process can be triggered by synchronization errors between feed rate and spindle speed, axis offset, faulty core holes and wear of the tapping tool. In order to detect process uncertainties during tapping and thus provide a basis for initiating countermeasures, a sensor-integrated tap holder was developed. This paper presents the realized concept of a rotating telemetry unit for signal processing, data acquisition and wireless data transmitting via WiFi standard on basis of low-cost embedded systems. Furthermore, two unique sensor concepts for measuring close-to-tool vibrations and the axial length compensation of the tapping tool are shown. Based on the sensor data in combination with feature engineering methods, process uncertainty during tapping are detected.

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“…In the threading process, the torque signal has some stages involving the cutting and friction tap teeth. This sequence is shown in Figure 7 and in order to correlate the torque data against the wear phenomena taking place in the threading process, this study selects the main stage called A TAPPING in Figure 7 when tapping a thread and although there are other stages, in the torque signal that are sensitive to the thread quality [25], these ones are less sensitive to the tap wear level. Due to the complexity of the tool tip geometry and the number of tooth/edge actives during the tapping process, the friction coefficient could not be directly calculated using the same methodology of [26].…”

Section: Torque Signal During Threading Processmentioning

confidence: 99%

Threading Performance of Different Coatings for High Speed Steel Tapping

Val¹,

Veiga²,

Pereira

et al. 2020

Coatings

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Threading holes using tapping tools is a widely used machining operation in the industry. This manufacturing process involves a great tool immersion in the part, which involves both friction and cutting. This makes the use of coatings critical to improving tool life. Four coatings are used based on Physical vapor deposition (PVD) technology—TiN, TiCN, TiAlN and TiAlN+WC/C are compared to uncoated tool performance. The effect of various coatings on the life of M12 × 1.5 tapping tools during threading of through holes 20 mm deep, in GG25 casting plates, dry and applying cutting speed of 50 m/min. The end-of-life criterion has been established based on a cutting torque of 16 N-m. Taking the uncoated tap as a basis for comparison, it is observed that coatings based on PVD technologies increase tool life doubling in the most advantageous case with the TiAlN coating. PVD type coatings provide better protection to wear at cylindrical area of the tool, where the thread profile is finished, than uncoated taps. The teeth located in the cone-cylinder transition zone of the taps suffer the most wear regardless of the coating. However, taps coated with TiAlN+WC/C wear level values is lowest of all the coatings tested, which indicates a strong reinforcement in these teeth.

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Thread Quality Control in High-Speed Tapping Cycles

Cited by 8 publications

References 20 publications

Analytical Model of Tapered Thread Made by Turning from Different Machinability Workpieces

Analytical Model of Tapered Thread Made by Turning from Different Machinability Workpieces

Sensor-integrated tap holder for process uncertainty detection based on tool vibration and axial length compensation sensors

Threading Performance of Different Coatings for High Speed Steel Tapping

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