Teknik

Pusat Sumber Belajar atau dapat juga disebut Wadah Sumber Belajar adalah suatu aktifitas yang terorganisir yang terdiri dari pimpinan, staf dan peralatan- peralatan yang dikelola guna kegiatan produksi, penyediaan dan penyajian material pembelajaran, pengadaan layanan pengembangan dan perencanaan, sehubungan dengan kurikulum dan kegiatan pengajaran di lingkungan kampus atau sekolah.

Research on the influence of clearance and punch velocity to determine the quality of the punched edge were conducted. This study uses pure copper sheet material with the clearance variation of 2.5, 5, 7.5 and 10%. Punch velocity is based on the ability of about Micro Punch CNC machine which is 100 and 2600 mm/min. At highest speed with a clearance of 2.5%, sheared zone is of about 395 μm or 79% of the material thickness. It can be concluded that the punch velocity gives positive influence on the sheared zone in copper. Basically the ideal outcome of the sheared edge of punching result is having rollover and small burr and contain at least 75% of the shear zone. This can be achieved with a clearance of 2.5%.

Joining carburized steel by welding process becomes promising technique to subtitute largely applied bolted connection on machine transmission elements which is often sustained from contact loading. The present study utilized microvickers and charpy impact tests to analyze the effects of welding current on hardness distribution and impact toughness of carburized steel joined by low-cost SMAW (shielded metal arc welding). The heat input played an important role to characterize the hardness distribution where the homogeneous distribution can be achieved by higher heat input controlled by higher welding current as a result of larger carbon-rich layer distribution within the fusion zone. The higher carbon enrichment at the center of fusion zone induced by higher welding current consequently reduced its ability to absorb impact energy after loading and thus degrade their impact toughness.

The pelvic bone fractured surgery commonly includes a plate implant as a part of assembling the fragmented bone fractured. One of the important process of pelvic bone surgery is a plate implant design that is often performed by bending process for getting a shape plate appropriate to the contour of the pelvic bone. This study was purposed to observe the characteristic a Ti plate alloy implant of the bending process by using Finite Element Analysis approach. The stress distribution and deformation of the plate were evaluated to variety distance of dying from the middle axis before and after maximum loading. The punching depth was set as the main load of punch. Hence, the angle of the plate under bending load and spring-back load were recorded and calculated for getting the resultant degree of slope. The existing resultant angle of plate model was caused by stress distribution on the plate. As reported on this study, the reducing distance of die from the middle axis could increase the maximum stress and reduced the spring-back effect so that the plate shape error could be minimized for assembling pelvic bone fractured. The increasing resultant angle of the plate was influenced by punching depth as well as recorded in this study.

A binder is any material used to strengthen the bonding of moulding sand grains. The primary function of the binder is to hold the moulding sand and other materialstogether to produce high-quality casts. In this study, there were four binder compositions being tested, i.e. 5% bentonite + 5% Portland cement, 4% bentonite + 6% Portland cement, 6% bentonite + 4% Portland cement, and 7% bentonite + 3% Portland cement. Each specimen was measured for its compressive strength, shear strength, tensile strength and permeability. The highest compressive strength was obtained fromthe specimen composed of 6% bentonite+ 4% Portland cement. The highest shear strength was obtained from the moulding sand with 7% bentonite+ 3%Portland cement. The highest tensile strength was obtained fromthe specimen contained 5% bentonite+ 5% Portland cement. The specimen composed of 5% bentonite + 5% Portland cement had the lowest permeability of 131 ml/min, while that of 6% bentonite + 4% Portland cement had the highest permeability of 176 ml/min..

This study aims to identify the influences between clearance and punch velocity on the part edge quality of blanked parts. Experiments have been conducted using material copper, punch-die clearance and punch velocity variations. In order to determine the reachable punch-die clearance and punch velocity required for blanking. The quality of the part-edge characteristics shows that higher punch velocity and decreases clearance value can improve the part-edge quality, resulting in smaller burr height and rollover, and a larger shear zone. Furthermore, it could be observed that the part-edge quality improvement when blanking with high punch velocity is much more distinct for stele than for copper. According to blanking theory, this improvement was expected because copper have much higher heat conduction coefficients. Therefore, the heat dissipates faster and the desired stress relief effect does not take place to the same degree as for stele.

This research aimed to identify the effect of punch speed and tool blanking material on the quality of the sheared edge bone-implant product in the form of a keychain cranioplasty plate implant. This research used Ti-6AL-4V sheet metal, 2.5% clearance between punch-die, various punch speeds, and materials of tool blanking. The tool blanking material used the standardized equipment for the blanking process. The sheared edge characteristic with the swift punch and high elastic modulus improved the shear zone 75% more of the workpiece thickness. The utilization of 71.76 mm/s speed and AISI M2 material created a smoother sheared edge of keychain cranioplasty plate compared to the others.

Keychain cranioplasty plate product has the potential to be produced using the blanking process because it is faster, low-cost, and requires low-energy consumption compared to other mechanical operations. This research aimed to find the effect of material thickness and type on the sheared edge characteristics of keychain cranioplasty plate using the blanking process to meet the international health standard. Experimental research conducted using an eccentric press machine with 40 tons capacity. This research's test material parameters of titanium (Ti-6AL-4V) and stainless steel (SS-316L) were the 0.5 mm, 0.6 mm, and 0.8 mm thickness with a maximum blanking velocity of 3000 mm/min and 2.5% punch-die clearance. Then, the blanking products were observed using a digital microscope. The results showed that the optimum blanking product quality was found in the titanium (Ti-6AL-4V) and stainless steel (SS-316L) materials with 0.6 mm thickness because it had stable sheared edge characteristics in each zone compared to other variations.

This study aims to investigate the surface roughness and the time consume printing on PLA material using FDM 3D printing on differences in layer height. A 3D printer machine, Creality Ender 3 was involved to manufacture the specimen. Furthermore, they tested with the SurftestSJ-301 Mitutoyo device to determine the roughness of surface object. The height of the test specimen layer varies from 0.05 mm to 0.25 mm with the increment of 0.5 mm for each variation, while the layer angle keep constant at zero degree (0°). Surface roughness and print time are analysed to determine the best design parameters. The test results show that, the greater of layer height has the rougher of the surface. In addition, the printing time is inversely proportional to surface roughness. The smallest of surface roughness occurs on the 0.05 mm of layer height, whereas the lowest occurs on the 0.25 mm of layer height. In addition, the optimize parameter occurs on 0.15 mm and 0.2 mm of layer height which surfa...

The increasing of needs on several industrial fields such as medical, electrical and mechanical field require accurate dimensional and geometrical function and efficiency in a product, one example being the manufacture of micro-hole and micropart products. As one of micromachining processes, CNC micro blanking machine is proposed as basic technology to fabricate the component with miniaturized dimension. In this study, the validation between theoretical input on the program control and mechanical motion is conducted to significantly reduce the gap between actual carriage motion and G-Code motion. The average deviation of actual velocity on post calibration is determined to be 10.8 mm/min, while for carriage displacement for X, Y, and Z axes are -0.0191; -0,0087; and -0.0005 mm, respectively. Based on the analysis has been performed, it can be concluded that the imprecision is caused by the geometrical deviation of carriage (linear guide), so, the carriage movement is hindered by the...

Abstrak: Proses pemanenan buah salak harus dikerjakan secara teliti untuk memilih buah mana yang layak panen. Untuk buah salak yang telah matang, biasanya dapat dipetik hanya menggunakan tangan. Namun, jika buah salak yang hendak dipanen berada di tengah-tengah pohonnya dan tertutup oleh duri-duri, maka proses panen salak menjadi sulit. Tim pelaksana pengabdian kepada masyarakat dari Jurusan Teknik Mesin Universitas Negeri Malang (UM) menjawab kebutuhan mitra, dengan memberikan solusi Inovasi TTG Full Plate Armor. Untuk mencapai tujuan pengabdian, prosedur yang ditempuh meliputi 1) survey lokasi, 2) pendekatan sosial, 3) pengembangan produk, 4) penyusunan panduan, 5) penerapan ipteks/TTG melalui kegiatan sosialisasi, introduksi alat/TTG dan pelatihan; 6) tindak lanjut melalui percontohan dan pendampingan; 7) monev: presentasi kemajuan dan laporan akhir, dan 8) memenuhi kewajiban luaran. Hasil PKM: 1) produk berfungsi dengan baik serta bermanfaat bagi pemakainya: a) melindungi tubuh ...

Abstrak: Desa gajahrejo merupakan salah satu desa di pesisir pantai malang selatan yang memiliki sumber daya alam buah kelapa yang melimpah. Dengan kondisi demografis tersebut menjadikan buah kelapa sebagai komoditas utama desa Gajahrejo. Olahan buah kelapa yang memiliki nilai tinggi yaitu dengan pengolahan buah kelapa menjadi minyak kelapa murni (virgin coconut oil). Virgin Coconut Oil (VCO) adalah minyak yang bisa didapatkan dari ekstraksi yang diambil dari buah kelapa segar yang diproses dengan berbagai metode. Proses pengolahan buah kelapa menjadi VCO dapat dilakukan dengan cara tradisional maupun menggunakan teknologi alat. Diharapkan dengan adanya informasi terkait pengolahan VCO dapat meningkatkan pendapatan masyarakat sekitar desa Gajahrejo. Solusi yang diusulkan yaitu solusi segi produksi dan manajemen usaha. Target kegiatan ini adalah tercapainya kelompok usaha Bersama (KUB) yang mampu menghasilkan produk secara mandiri dan penggunaan alat teknologi tepat guna (TTG) berupa...

Abstrak Penelitian dilakukan pada departemen Workshop Engineering PT Djarum Kudus, yang berperan penting dalam penyediaan komponen (spare part) bagi departemen pre process secondary untuk produksi rokok SKM (Sigaret Kretek Mesin). Permasalahan utama pada departemen Workshop Engineering adalah pada mesin CNC MA-1 yang hanya mampu beroperasi sebesar 61,76% dari total waktu jam kerja. Untuk mendapatkan akar utama permasalahan serta memberikan usulan perbaikan maka dilakukan analisa terhadap Overall Equipment Effectiveness (OEE) pada mesin tersebut. OEE membagi performa dari manufaktur menjadi tiga komponen yang diukur yaitu Availability, Performance, dan Quality Rate. Tiap komponen menunjuk pada aspek proses yang ditargetkan untuk dilakukan improvement. Hasil perhitungan OEE pada mesin CNC MA-1 adalah sebesar 41,35% yang masih berada di bawah target internal perusahaan 70% apalagi dengan target World Class OEE yaitu 85%. Hal ini membuat ruang yang lapang untuk melakukan improvement yang diprioritaskan terhadap kontribusi nilai OEE terendah dari target internal yaitu komponen performancy. Dengan menggunakan diagram pareto dan fishbone diagram didapatkan akar permasalahan utama turunnya kecepatan adalah karena pengerjaan hard material serta search tool. Kata kunci: maintenance, OEE, TPM, workshop engineering ISBN 978-602-99334-2-0