Purpose: Friction drilling is a unique way of creating holes in steel. In a solitary advance, a rotating conical tool is utilized to enter by penetrating as an opening on the surface of the sheet and making a bushing without making a chip. During this process, the heat produced by the frictional power linking the device and the sheet metal workpiece is used to pierce and make a bushing out of work. The goal of this novel hole-making process is to improve the bushing length in the thin-walled sheet metals by forming a bush and then combining thin sheet metals. The inconceivable utilizations of warm grating penetrating in a few modern areas will introduce another period of interfacing processes for different work materials in automobiles. Design/methodology/approach: Researchers have undergone numerous experiments based on the machining parameters, including spindle speed, feed rates, Friction Contact Ratio (FACR), tool angle, tool diameter, sheet thickness, and the output of the friction drilling, includes the bushing length, surface roughness, tool wear, hardness, thrust force, torque and microstructural evaluation. Findings: The crucial concerns that should be addressed and researched by researchers in the near future, such as determining the optimal machining parameters of such process and analysing, bushing length, microstructural impacts on the many aspects and their performance, are highlighted. Research limitations/implications: This research paper tends to examine the advancements in research on the friction drilling method and its applications, taking into account the benefits and limits of friction drilling. Practical implications: The present paper identifies the machining parameters and their contribution towards the output level of various materials like Stainless steel, Brass, aluminium, titanium, tempered steel and nickel-based compounds of different thickness. Originality/value: The machining parameters like spindle speeds, feed rate, tool angles, thrust force, Torque, surface roundness, bushing height, frictional heat and tool diameter are optimized in the friction drilling. The incorrect bushing is formed due to the high thrust force, and Low temperatures cause ductility and softening issues.
The presented paper contains a description of a new method of determining the optimum feed rate for a waste-free, energy-efficient drilling process being a friction drilling. Previous experience has shown that the energy required to drill a hole by friction drilling is closely correlated with the drilling cycle time. Based on the authors' own experience, the thesis was put forward that the optimum feed rate during the drilling procedure should be variable but smooth. Additional evaluation criteria for the developed method were the drilling cycle time, the maximum values of the axial force and torque, the maximum values of the feed drive and machine spindle drive load, as well as the energy consumption. The test rig was based on a numerically controlled machine tool, equipped with an axial force and torque sensor, and additional dedicated measuring devices for measuring energy consumption. The results of the study indicate the high competitiveness of the developed approach, compared to the feed rate control strategies in a friction drilling cycle known from the literature. The proposed approach for selecting the longitudinal feed rate can quickly gain a significant number of applications. Studies have shown that optimally planned feed rates can reduce energy intensity by up to 47%.
3
Dostęp do pełnego tekstu na zewnętrznej witrynie WWW
W artykule opisano wyniki badań wpływu wybranych parametrów termowiercenia (zwanego także wierceniem tarciowym lub termicznym) wiertłem termicznym typu flat z węglików spiekanych na jakość otworów wykonanych w profilach prostokątnych ze stali nierdzewnej AISI 304 o grubości 2 mm oraz stali konstrukcyjnej S235 o grubości 1,5 mm. W badaniach szczególną uwagę zwrócono na wpływ termowiercenia na mikrostrukturę i mikrotwardość stali poddanych procesowi termowiercenia.
EN
The article describes the results of the research on the influence of the selected parameters of thermal drilling (also called friction or thermal drilling) with the use of a flat friction drilling tool made of high speed steel on the quality of holes made in rectangular profiles of the AISI 304 stainless steel of the thickness of 2 mm and of the structural grade S235 steel of the thickness of 1.5 mm. During the studies, particular attention was paid to the impact of thermal drilling on the microstructure and microhardness of the investigated steels.
Friction drilling as a non-chip drilling method requires a special formed tool. This tool can be combined with conventional drilling machines as well as milling machines, also CNC ones. The choice depends only on the factors related to production volumes. Tool must have high durability properties to reach proper efficiency level. This means the number of boreholes that can be formed while maintaining the shape and structure of the surface within the dimensions tolerances limits. High temperature in the process also causes high durability properties. These article presents a review of possible solutions on tools mounting devices and tools functionality used in friction drilling process.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.