PRODUCTION PLANNING AND CONTROL SYSTEM WITH JUST IN TIME AND LEAN PRODUCTION : A REVIEW

Manufacturing can be defined as applying physical and/or chemical processes to modify the structure, properties and/or appearance of a given starting material to produce parts or products. Manufacturing often entails combining multiple parts for the creation of assembled products. This study aimed to establish a general understanding of development production planning and control and typical production such as just in time and lean production. Method of this study through literature review. This study described activities related to production planning and production control, the difference between lean production and traditional production (push system), and the structure of lean production as known as Toyota system manufacturing

THIN WALLED CRYOGENIC MACHINING ON INCONEL OR AEROSPACE MATERIALS

Conventional liquids and lubricants are widely used in machining processes throughout the world. However, this cutting liquid is the source of many environmental pollution problems. In order to reduce or eliminate the effect produced by cutting fluids, it is necessary to switch to a continuous machining technique such as using small amounts of cutting fluid, liquid nitrogen, vegetable oil or compressed air as a cooling lubrication medium. Cryogenic coolant is found to be more efficient, economical, cost-effective and environmentally friendly when compared to the conventional coolant, especially in mass production. In machining difficult-to-cut materials such as thin walled materials for the aerospace industry, cooling applications are needed. Ni-based superalloy, Inconel is a material for aerospace applications because of its high durability to wear and material that is resistant to oxidation and corrosion at high temperatures. This paper presents a review and explanation of thin wall machining using cryogenic cooling systems on inconel or aerospace materials

APPLICATION OF PRODUCT QUALITY ASSURANCE IN MANUFACTURE, CASE STUDY IN MECHANICAL ENGINEERING DEPARTMENT, SRIWIJAYA UNIVERSITY

Product Quality Assurance (PQA) is a standard procedure to ensure the product quality in practical manufacturing engineering. In this study the PQA-procedure will be applied for academic assurance in Mechanical Engineering Department, Sriwijaya University. The objective of this study is to generate web based Academic Quality Assurance (AQA) in the Department, which accomplices with National Accreditation Agency for Higher Education (BAN-PT). The development of web based AQA was carried out using an open source PHP, MySQL, CSS and REST API to ensure the web integration with the existing website of Sriwijaya University. The results show that this application can overcome the existing problems when the Academic Quality Assurance was conducted manually. The AQA web can work smoothl

Optimum performance of green machining on thin walled Ti6AL4V using RSM and ANN in terms of cutting force and surface roughness

Thin walled titanium alloys are mostly applied in the aerospace industry owing to their favorable characteristic such as high strength-to-weight ratio. Besides vibration, the friction at the cutting zone in milling of thin-walled Ti6Al4V will create inconsistencies in the cutting force and increase the surface roughness. Previous researchers reported the use of vegetable oils in machining metal as an effort towards green machining in reducing the undesirable cutting friction. Machining experiments were conducted under Minimum Quantity Lubrication (MQL) using coconut oil as cutting fluid, which has better oxidative stability than other vegetable oil. Uncoated carbide tools were used in this milling experiment. The influence of cutting speed, feed and depth of cut on cutting force and surface roughness were modeled using response surface methodology (RSM) and artificial neural network (ANN). Experimental machining results indicated that ANN model prediction was more accurate compared to the RSM model. The maximum cutting force and surface roughness values recorded are 14.89 N, and 0.161 μm under machining conditions of 125 m/min cutting speed, 0.04 mm/tooth feed, 0.25 mm radial depth of cut (DOC) and 5 mm axial DOC

A Review of Minimum Quantity Lubrication Technique with Nanofluids Application in Metal Cutting Operations

Minimum quantity lubrication (MQL) technique did not only serve as a better alternative to flood cooling during machining but enhance better surface finish, minimizes the cost, reduces the impact loads on the environment and health hazards on the operation personnel. However, the coolant or lubrication media used in MQL technique posed certain restrictions especially at very high cutting speeds where the lubricating oil tends to evaporates as it strikes the already heated cutting tool at elevated temperature. Desire to compensate for the shortcomings of the lubricating media in the MQL technique led to the introduction of nanoparticles in the cutting fluids for use in the MQL lubrication process. Nanoparticles have much higher and stronger temperature-dependent thermal conductivity and enhanced heat transfer coefficient at very low particle concentration, which are key parameters for their enhanced performance in many of the machining applications. Optimizing the nanoparticles concentration leads to efficiency in most of their application. Their ball bearing effect lubrication at the cutting zone through formation of film layer which reduces friction between the contact surfaces thereby reducing cutting force, temperature and tool wear. It has been reported in various studies that nanoparticles introduction in cutting fluids led to excellent machining performance in reduction of cutting forces, reduced tool wear, reduced cutting temperature and improved surface finish of the work piece thereby increasing productivity and reduction of hazards to the health of personnel and the environment better than the pure or conventional MQL process. Thus, the application of various nanoparticles and its performances in metal cutting operations with respect to the cutting forces, surface finish, tool wear and temperature at the cutting zone are evaluated and highlighted

Effects of Metal Fillers on Properties of Epoxy for Rapid Tooling Inserts

Metal filled epoxy has been recognised as an alternative material used in rapid tooling application such as core and cavity for injection moulding. The addition of fillers into the metal filled epoxy has proven to increase the epoxy’s mechanical performance such as wear, strength, improved machinability and thermal properties. Physical and thermal properties such as density, thermal diffusivity, thermal conductivity and compressive strength were analysed to evaluate the effects of inclusion of metal fillers such as copper and brass particles into the blended epoxy matrix. Brass and copper powders were added separately ranging from 10%, 20% and 30% of its weight into the aluminium filled epoxy mix ratio. Increased density, thermal diffusivity and thermal conductivity values were evident with a linear trend when both filler compositions were increased from 10% to 30%. Brass and copper density values of 2.22 g/cm3 and 2.08 g/cm3 respectively were recorded at the highest filler composition. Copper fillers with 30% composition in epoxy matrix exhibited the highest average value of thermal diffusivity of 1.12 mm2/s and thermal conductivity of 1.87 W/mK, while inclusion of brass showed no significant improvement on the properties. Compressive strength increased from 76.8 MPa to 93.2 MPa with 20% of brass fillers and 80.8 MPa with 10% of copper fillers composition. The addition of more metal fillers resulted in a decrease in compressive strength due to the presence of porosity. This study validated previous researchers that fillers enhance mechanical, thermal properties and density of aluminium filled epoxy

APLIKASI PEMBUATAN PROGRAM WORKTIME SCHEDULING PADA SISTEM PENDIDIKAN DI JURUSAN TEKNIK MESIN

Ringkasan Perkembangan kemajuan ilmu dan teknologi sangat pesat dengan adanya globalisasi. Satu negara bersaing dengan negara lainnya seperti dalam hal kemajuan industri. Hal tersebut memicu suatu negara untuk meningkatkan sumber daya manusia agar dapat menghasilkan suatu produk yang dapat bersaing. Dalam meningkatkan sumber daya manusia maka peran perguruan tinggi sangat penting dan oleh karena itu perguruan tinggi harus dapat bersaing. Teknologi memiliki peranan yang sangat penting dalam menciptakan sumber daya manusia yang berkualitas. Dengan berkembangnya teknologi kita dapat memperoleh informasi secara cepat, tepat dan akurat, layanan yang dibutuhkan dan kecanggihan teknologi ini juga dapat dijadikan sebagai media komunikasi.Dalam menunjang usaha meningkatkan kulitas Teknik Mesin, salah satu cara yang dapat dan harus ditempuh adalah disiplin kerja dan disiplin waktu dengan memanfaatkan kemajuan teknologi

PERANCANGAN JIG AND FIXTURE ALAT CNC-CMM THOME PADA LABORATORIUM CAD/CAM FAKULTAS TEKNIK JURUSAN TEKNIK MESIN UNIVERSITAS SRIWIJAYA

ABSTRAK Skripsi ini membahas proses (fase-fase)  perancangan Jig and Fixture untuk mesin CNC-CMM Thome pada laboratorium CAD/CAM Fakultas Teknik Jurusan Teknik Mesin Universitas sriwijaya dengan memperhatikan informasi keinginan pengguna dan persyaratan yang harus dipenuhi oleh produk. Informasi yang didapat digunakan untuk membuat blok fungsi dan diagram blok fungsi alat, kemudian dilanjutkan dengan membuat matriks morfologi yang akan menghasilkan konsep produk, yaitu CMM fixture ini terdiri dari berbagai komponen (table tapped, standoff, V magnet, steel cone, pivot joint, soft touch clamp, adjustable jack stand, slide base, pin standoff dan rotating standoff) dengan berbagai ukuran dan metode yang digunakan untuk proses bongkar pasang (assembly) adalah metode screw dengan menggunakan ulir yang sama dengan yang lain, yaitu ¼â€- 20. Konsep produk ini dilanjutkan dengan pemberian bentuk komponen-komponen yang telah dikonsep dan akan dibuat detil design berupa gambar rancangan lengkap, spesifikasi produk untuk pembuatan produk dan Bill of Material (BOM).   Kata Kunci : Jig and fixture, CNC-CMM Thome, tahap-tahap perancangan.   ABSTRACT This thesis discusses the process (phase-phase) Jig and Fixture design for CNC-CMM Thome on laboratory CAD / CAM Faculty of Engineering Department of Mechanical Engineering University of Sriwijaya with respect to the information the user desires and requirements that must be met by the product. The information obtained is used to create a function block and function block diagram tool, then proceed with making matrix morphology that will generate product concept, namely CMM fixture consists of various components (table tapped, standoff, V magnets, steel cone, pivot joint, soft touch clamp, adjustable jack stand, slide base, and rotating pin standoff standoff) with various sizes and methods used for the process of assembling (assembly) is a method of using a threaded screw which is equal to another, ie ¼ "- 20. This product concept continued with the form of the components that have been drafted and will be made in the form of detailed design complete design drawings, specifications and products for the manufacture of the product Bill of Material (BOM). Keywords: Jig and fixture, CNC-CMM Thome, design stages

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