JURNAL MESIN TEKNOLOGI
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LINE BALANCING ANALYSIS BY USED RANK POSITIONAL WEIGHT (RPW) (CASE STUDY: PART BODY S11038Z PROCESS)
Full text linkThe purpose of this paper is to determine the number of proposed work stations based on Rank Positional Weight and to find out the results of the comparison between the initial work station conditions and the proposed work station conditions. The method used in optimizing Line Balancing is the Rank Positional Weight (RPW) method by calculating the amount of processing time, Balance Delay, Smoothness Index, the largest track efficiency, and station efficiency. The results of the comparison between the initial work station conditions and the proposed work station conditions using the RPW method in the total production process time of the S11038Z section from the initial conditions of 1060.23 seconds after analysis using the RPW method obtained a shorter processing time of 970.23 seconds or reduced by 90 seconds. The balance delay in the initial condition was 67.6% with the RPW method, the result was that the balance delay was better, namely 62.9%. The smoothness index in the initial conditions is 1059.79 to 857.88. The tracking efficiency increased by 4.7%, from 32.4% to 37.1%. The efficiency of the biggest workstations also increased, from 489 seconds to 399 seconds
Modification of Digital Oil Pressure Measurement Equipment using Bluetooth Technology
Full text linkPT United Tractors Tbk Jakarta workshop held a lot of Machine Inspection Programs for Komatsu units. During the implementation of the Machine Inspection Program (PPM) the machine inspection program is one part of the maintenance that is carried out periodically to obtain accurate data on the condition of the equipment at the time by carrying out checks and adjustments using measurement methods and diagnostic instruments The use of a pressure gauge is still using manual and has a measurement distance that is still limited, if workers or mechanics are not equipped with sufficient knowledge then the pressure gauge will have the potential for error in use and the selection of a pressure gauge is not appropriate to the pressure gauge directly connected to the hydraulic pressure through the hose then the work process ppm is not enough 1 manpower. Therefore it is necessary to modify a digital pressure gauge that has a wide range of scales, in addition a wireless connection is needed to enable the operation of the unit and measurements are made 1 manpower and Bluetooth is one of the right choices in addition to the reach can be met in an application not too difficult so that readings measurement results can be connected directly via mobile
Karakterisasi Unjuk Kerja Mesin 100 CC dengan Bahan Bakar Syngas
Full text linkGasification is a process of converting carbon-containing compounds to convert both liquid and solid materials into fuel-capable gas (CO, H2, CO2, CH4, and H2O) through the combustion process with limited air supply. Gasification that we have known so far is gasification with coal feed and agricultural waste, but gasification with livestock waste feed has never been done. In this study the gasification feed material used horse dung biomass with a gas agent in the form of oxygen. The purpose of this study was to determine the effect of oxygen flow rate (4 variations namely 10, 15, 20 and 30 lt / min) in the process of gasification of horse dung (produced 4 fuels namely syngas A, syngas B, syngas C and syngas D) on the performance capabilities of a 100 cc engine. The stages of the research carried out were drying feed material, gasification process, syngas storage and testing on a 100 cc engine with various variations of rotation (4 variations namely 1500, 2500, 3500 and 4500 rpm). The results obtained from this study are the highest torque and effective power obtained in syngas A fuel for various engine speeds. At 4500 rpm, a torque of 6.7 Nm is obtained, while an effective power of 3156 Watts is used to test engine results using Syngas A fuel
Analisis Ketebalan Lapisan pada Pengecatan Baja Karbon Rendah menggunakan Metode Respons Permukaan
Full text linkThe number of vehicles has increased every year. This increase was accompanied by an increase in the number of accidents that occurred. Accidents that occur result in damage to vehicles so that repainting is needed. Painting is an effort made by applying paint in liquid form on the surface of an object to create a layer on the surface of the object. Painting serves to protect and improve the appearance of a surface. The purpose of this study is to determine the effect of a combination of parameters that can produce maximum thickness values. The experimental design used in this study is a surface response method with three parameters where each parameter has three levels. The parameters chosen were spraying distance (110 mm, 130 mm, 150 mm), composition between paint-thinner (1: 1.6; 1: 1.4; 1: 1,2), and pressure (3,5; 4 , 5; 5.5). The painting process is carried out with the help of a paint test demonstrator. The painting results are dried in the oven and then measured using a thickness gauge. The measurement data is processed using the help of Minitab software and the estimator equation for thickness is obtained. The parameters with the greatest influence in this study are the distance of spraying with a distance coefficient of 2.258. Painting with the highest average value of thickness occurred in the fifteenth experiment with a thickness value of 39.9µm. The thickness is obtained by variable variations of 130mm distance, paint-thinner 1: 1.4 composition and 4.5 bar pressure
ANALISIS KETAHANAN ABRASI MATERIAL OUTSOLE POLYURETHANE (PU) & NITRILE BUTADINE RUBBER (NBR) PADA SAFETY SHOES CHEETAH DI PT. X
Full text linkImproved quality, strength and life time in terms of abrasion resistance on safety shoes outsole Cheetah material where the process use of some material has decreased in quality, besides due to usage factors, maintenance factors, and some of these materials also experience problems during use. This study is done to determine the abrasion resistance of each Outsole Polyurethane (PU) material and Nitrile Butadiene Rubber (NBR). Abrasion resistance test on the material method used the DIN Abrasion tester. Retrieval of data on outsole material was carried out on the outsole material with new conditions and that has been used in the field for a period of 1 year with a method of measuring abrasion resistance index and density of material. Calculation of average abrasion resistance for new Polyurethane (PU) type was 37 , 11 mm3 / year, while the average abrasion resistance for Polyurethane (PU) type that has been used for 1 year was 33.19 mm3 / year so that the difference is 3.92 mm3 / year or about 11% quality decrease of abrasion resistance. The average abrasion resistance with the new Nitrile Butadiene Rubber (NBR) type was 108.26 mm3 / year, the average abrasion resistance for Nitrile Butadiene Rubber (NBR) type with conditions already used in 1 year period was 107.44 mm3 / year so that the difference is 0.82 mm3 / year or about 1% decrease in quality decrease of abrasion resistance. Abrasion tolerance limits that have been set according to the SOP (Standard Operational Procedure) against abrasion resistance if SG ≥ 0.9 then the Abrasive Max is 150 and if SG ≤ 0.9 Then the Abrasive Max is 250
Pengaruh Waktu Penahanan pada Perlakuan Panas Paska Pengelasan terhadap Ketangguhan Sambungan Las Baja
Full text linkOne of the welding methods that is widely used today because it is easier to operate, more practical in its use, can be used for all welding positions and more efficient is called Shield Metal Arc Welding (SMAW). In this welding, the base metal and filler metal will experience thermal cycles which lead to local heating and cooling processes resulting in residual stress and distortion in the material. This residual stress must be removed because it causes a decrease in the mechanical properties of the material. The most widely used method is the thermal method that is by Post Weld Heat Treatment (PWHT). The success of The post-weld heat treatment in removing residual stresses in PWHT is influenced by the holding time. This study aims to examine the effect of holding time on heat treatment, on the weld toughness of steel. In this study, the type of welding used was SMAW welding, the material used was steel AISI 4130, the electrodes used were LB-7018-1 standard application and AWS classification A5.1 E7018-1. The test holding temperature is 650oC. The holding time of testing uses three variables, namely: 2.5 hours, 4.5 hours, 6.5 hours. The Impact testing is done by the Charpy method. From this study, the influence of holding time variation on PWHT holding temperature on the weld strength of AISI 4130 steel was obtained
TEKNOLOGI PROSES PENGECATAN MENGGUNAKAN SISTEM ATOMISASI PADA PRODUK BERBAHAN PLASTIK DI INDUSTRI PERAKITAN SEPEDAMOTOR
Full text linkMotorcycles are a type of transportation that is familiar in Indonesia. Cost product and speed for mobilization are the main reasons for choosing this transportation. Demand for motorcycles that are still large in Indonesia and encouraged motorcycles manufacturing industries to deliver products according to consumer needs. To be able to meet the varied needs of consumers, motorcycle manufacturers always make improvements in all of their production area. There are two main components in the motorcycle, engine and frame. These two components are produced by several parts of production based on the characteristics of each product. The production section of the motorcycle industry that do paintingactivities on plastic products is painting plastic section. The coating technology used in painting plastic is atomization . This technology is a converting liquid material into mist or granules used to coat the product. This technology has many challenges in terms of material transfer to products. The selection of the right material is the key to the atomization process, besides that human factors are also important because the operator's competence or expertise during the painting process can affect product yield. From these problems the author tries to map some of the problems caused by paintings, including technological materials, production systems, product quality and problems caused by painting processes to the environment. However with the level of complexity of the problems faced by the plastic paintingsection, not many studies have focused on the problems in the paintingprocess of plastic products. Therefore the author tries to give a detailed description of the production process in the painting plastic section. The author divides this article into several sub-chapters including paintingtechnology, technology material, production system and Quality properties. Furthermore, the authors hope that this article can be used as a basis for developing the paintingprocess on plastic products
KAJI EKSPERIMENTAL PENGARUH BAFFLE PADA ALAT PENUKAR PANAS ALIRAN SEARAH DALAM UPAYA OPTIMASI SISTEM PENGERING
Full text linkHeat exchangers or heat exchangers are tools used to change the temperature of the fluid or change the fluid phase by exchanging heat with another fluid. In a heat exchanger, the ability to exchange heat is largely determined by the type of fluid flow and fluid passing through the heat exchanger. The use of heat exchangers in the field of drying is now a necessity to overcome the problems of drying productivity. The purpose of this study was carried out to determine the effectiveness of the heat exchanger experimentally based on directional flow by comparing construction using baffle and without using baffle in an effort to optimize the drying system. The research method was carried out by fabricating 2 units of heat exchangers and by field testing. The test data obtained are the input and output temperatures of the heating fluid flow and cooling fluid flow and flow velocity. Based on preliminary research data shows that the use of baffle affects the increase in temperature on the heat exchanger, where at the fresh air outlet that does not use baffle produces a temperature of 72oC while the baffle produces 88oC with the Log Mean Temperature Difference heat exchanger without using a baffle higher than heat exchanger that uses a baffle guide blade. This can illustrate that the smaller heat losses are wasted so that the absorption of heat by the reverse system will be higher
Analisis Pengujian Dry Gas Seal Type 28AT Tandem untuk Meningkatkan Reliability Dry Gas Seal di Kompresor Setrifugal
Full text linkDry gas seal testing is one of the stages in the repair and maintenance of dry gas seals because without testing dry gas seals will have fatal consequences, which can cause more severe damage to the compressor and repair of humans and the environment. In the operation and maintenance of centrifugal compressors, especially gas compressors, there is often damage to dry gas seals or even if they are not damaged dry gas seals must be kept in a health check so that they can be used optimally and their reliability can be improved. In conducting a health check or repairing dry gas seal, one of the determinants of success is through static and dynamic testing using the DGS test rig or the other. Therefore it is very important in testing this dry gas seal that the author tries to learn how to complete the tests that must be considered in the testing procedure. In this study it can be concluded that the maximum speed used reaches 11429 rpm, when compared to the procedure is 1 - 1,225 x rpm in the compressor then the rotation obtained according to the procedure is (1,225 x 10000 = 12250 rpm maximum), with conditions 11429 rpm already fulfilling standard and is still within tolerance of testing rounds
PEMELIHARAAN MESIN DISC MILL SENTRA PETERNAKAN RAKYAT (SPR) CINAGARBOGO
Full text linkSentra Rakyat Rakyat (SPR) is a collection of cattle breeders in the Subang Regency area. SPR aims to raise beef cattle and provide ruminant feed. Ruminant feed made from corn hump waste. The disc mill machine is used in the process of destroying corn lumps into flour, flour from the results of this corn hump will be combined with other components to form a ruminant feed for cattle feed. The process of making feed is disrupted because the disc mill machine is damaged. This study aims to detect damage to the engine and clasification maintenance of disc mill machines using the Inspection, Medium Repair, Small Repair, and Overhaul (ISMO) methods. The method used in data collection is in the form of interviews and observations. Data is analyzed qualitatively description. The results of this study are (1) machine damage, namely the disc mill cutting blade allowance caused by the destruction of the engine shaft bearing; (2) More maintenance is needed on filter sections, cutting blades, crankshafts, v-belts and bearings