Mekanisme Pembentukan Burr pada Pemesinan Frais Mikro Ti 6Al- 4V ELI dalam Keadaan Kering

Abstract

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.

EVALUASI PERLAKUAN EQUAL-CHANNEL ANGULAR PRESSING (ECAP) DENGAN RUTE Bc PADA BATANG TITANIUM (Ti-ROD) DENGAN ANALISIS DIFRAKSI SINAR-X

“…Logam titanium merupakan logam yang banyak digunakan di berbagai bidang industri seperti dirgantara, biomedis, elektronik, dan lain sebagainya [1]. Keunggulan dari titanium terletak pada kekuatan bahannya, terutama kekuatan mekaniknya [1]. Titanium umumnya dijual secara komersial dalam bentuk paduan dengan bahan lainnya.…”

“…Evaluasi struktur kristal dilakukan terlebih dahulu dengan menginvestigasi struktur kristal heksagonal menggunakan prinsip dari persamaan (1). Hasil investigasi struktur heksagonal pada ketiga sampel batang titanium dapat dilihat pada Tabel 2.…”