In this paper, turning with actively driven rotary tool was investigated. The influence of machining conditions such as tool rotational speed and inclination angle on the cutting edge temperature is examined experimentally. The temperature was measured by a thermocouple of constantan wire and work material. Experimental results show that the cutting temperature decreases with increasing tool rotational speed to a minimum value at a certain tool rotational speed and then increase. Next, the minimum temperature recorded by tool rotation was approximately 150oC lower than that the cutting with a non-rotating tool. Finally, the cutting temperature also decreases with the increase of inclination angle to a minimum value at an inclination angle.

Experimental investigation on hard turning of AISI 4340 steel using cemented coated carbide insert J Pradeep Kumar, K P Kishore, M Ranjith Kumar et al. Abstract. Magnesium is a lightweight metal that is widely used as an alternative to iron and steel. Magnesium has been applied in the automotive industry to reduce the weight of a component, but the machining process has the disadvantage that magnesium is highly flammable because it has a low flash point. High temperature can cause the cutting tool wear and contributes to the quality of the surface roughness. The purpose of this study is to obtain the value of surface roughness and implement methods of rotary cutting tool and air cooling output vortex tube cooler to minimize the surface roughness values. Machining parameters that is turning using rotary cutting tool at speed the workpiece of (Vw) The influence of machining parameters concluded the higher the speed of the workpiece the surface roughness value higher. Otherwise the higher cutting speed of rotary tool then the lower the surface roughness value. The observation on the surface of the rotary tool, it was found that no uniform tool wear which causes non-uniform surface roughness. The use of rotary cutting tool contributing to lower surface roughness values generated.

One of the ingredients that are popular now is titanium, but titanium is a material that is difficult to process using conventional milling machining because of the poor thermal conductivity of the material so that the high-temperature machining process produced in the cutting zone causes plastic deformation in cutting tools and increased chemical reactivity in titanium. High-speed micro-milling machining can be used for micromachining of hard metals or alloys that are difficult to achieve at low speeds. Micro milling machining in titanium material 6Al-4V ELI with variations in milling knife diameter 1 and 2 mm, spindle speed 10.000 and 15.000 rpm, feed 0,001 and 0,005 mm / rev, depth of cut 100 and 150 μm, which then do data processing using the method Taguchi full factorial and theoretical analysis. The results showed that the diameter of the tool and into the cut had the greatest effect on burr formation, the greater the diameter of the milling blade resulted in the formation of shorter and smaller burrs, the use of a 1 mm diameter milling blade and a 150 μm depth cut gave rise to long burr formations and tight, while the use of a 2 mm diameter milling blade and a cutting depth of 100 μm give rise to a short and slight burr formation.

The titanium alloy Ti-6Al-4V ELI is most commonly used for medical implant products because it is corrosion resistant, high strength, and lightweight. In actuality, the temperature will be very high during the machining of this material. This will accelerate the tool wear and affect the surface roughness. Turning with the Actively Driven Rotary Tool (ADRT) has been proven to decrease the cutting temperature so that it is suitable for machining the Ti-6Al-4V ELI. This study focuses on investigating the surface roughness and morphology of Ti-6Al-4V ELI when turning with the ADRT. The surface roughness was measured using the surface profile tester, while the surface morphology was observed using a Scanning Electron Microscope (SEM). The turning with ADRT parameters consisting of the tool diameter, cutting speed, tool revolution speed, feed, and tool inclination angle were analyzed for their effects on the surface roughness. Results show that the cutting speed and tool inclination angle have a significant effect, with a contribution effect of about 67% on the average surface roughness (Ra). The increasing cutting speed resulted in the increased average surface roughness (Ra). The average surface roughness (Ra) also increased with an increasing tool inclination angle. Moreover, no physical damage was observed, such as cracks, micro-pits, and a white layer on the material’s surface morphology.

ABSTRAKTulisan ini membahas pemodelan dan simulasi pengelasan berbasis metode elemen hingga (MEH) untuk memprediksi distorsi pengelasan bilah roda traktor. Dua pemodelan MEH dibutuhkan untuk mendapatkan model distorsi pengelasan, yaitu termal dan elasto-plastis. Pengaruh termal pengelasan diasumsikan sebagai gaya tendon dijadikan masukan pada analisis elasto-plastik. Hasil simulasi distorsi pengelasan diverifikasi dengan menggunakan data eksperimen pengelasan. Hasil verifikasi menunjukkan kemiripan bentuk deformasi pengelasan antara simulasi dan eksperimen. Deviasi nilai distorsi displacement antara simulasi dan eksperimen adalah kecil. Karenanya, simulasi pemodelan deformasi pengelasan menggunakan MEH termal elasto-plastis dapat digunakan untuk memprediksi distorsi pengelasan bilah roda traktor. Berdasarkan hasil simulasi, bentuk distorsi displacement radial dan aksial akibat pengelasan bilah dengan urutan serial adalah lebih besar dibandingkan bentuk distorsi akibat pengelasan bilah dengan urutan seperti direkomendasikan. Setelah simulasi pengelasan sejumlah 16 bilah roda traktor, nilai distorsi displacement akibat urutan pengelasan bilah serial diprediksi sebesar 3,393mm, dimana adalah lebih besar dibandingkan nilai 1,440mm akibat urutan pengelasan bilah yang direkomendasikan.Kata kunci: Pengelasan, distorsi, bilah roda traktor, urutan pengelasan, dan metode elemen hingga. ABSTRACT This paper discusses the modelling and simulation of welding process based on the finite element method (FEM) in order to