Dodi Sofyan Arief, Dodi Sofyan
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Analisis Design For Assembly (DFA) pada Prototipe Mesin Pemisah Sampah Material Ferromagnetik Dan Non Ferromagnetik

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Design for assembly is one of systems analysis to assembling components, simultaneously, throughout the products from beginning of process design. As result, obstacles to get assembly could be minimalizing before components production. DFA analysis will be obtaining the value of efficiency on assembly. Through this way, the efficiency value of machine prototype to separating waste, both, ferromagnetic and non-ferromagnetic materials can be achieved. Furthermore, efficiency value on assembly of prototype design is 14.22% at 548.47 seconds theoretically. The efficiency value of prototype after production and assembling process on actual condition is 11.83% at 658.88 seconds. The distinction from these efficiency values is caused by difficulty on assembly of the belt roller and sub assembly of base support on motor. As consequences, the time to get assembly will take more time on actual condition rather than theoretically.Keywords : Design For Assembly (DFA), Efisiency Assembly

Analisis Pengaruh Kecepatan Motor Dan Gaya Magnet Terhadap Kapasitas Produksi Pada Prototipe Mesin Pemisah Sampah Material Ferromagnetik Dan Non Ferromagnetik

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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This research aims to analyze the influence of motor velocity and magnetic force upon the production capacity on the centrifuge prototype of the ferromagnetic and non-ferromagnetic material waste based on the calculation of production capacity, induced magnetic attraction, and the ratio of separated ferromagnetic material with non-ferromagnetic material. The research is experimental research with the numbers of sample ratio of ferromagnetic material waste is 50% and non-ferromagnetic waste is 50%. Based on the conducted tests and calculations, the results are 1) the maximum production on centrifuge prototype of the ferromagnetic metal waste and non-metal is 0.0313 kg/s, 2) the obtained magnetic electricity attraction is 5,75 N, and 3) The amount of ferromagnetic material that mostly separated from the mixture of ferromagnetic and non-ferromagnetic material waste in ferromagnetic tub is when the engine rotation indicates 20 rpm and the magnetic force indicates 4,85 N.Keywords: Belt Conveyor, Magnetic Electricity, Production Capacity

Kalibrasi Jangka Sorong Nonius (Vernier Calliper) Berdasarkan Standar Jis B 7507 Di Laboratorium Pengukuran Teknik Mesin Universitas Riau

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Vernier calliper is very much used either by measurement laboratories and production. Vernier calliper measurement tools necessary to calibrate each period of 12 months, with a calibration done will determine the value of the correction/error and the value of the measurement uncertainty of measuring instruments vernier calliper. In this study calibration of vernier calliper follow the standard JIS B 7507 - 1993 at which the standard has been described specification requirements vernier calliper. Based on the results of the calibration has been done vernier calliper I have a maximum error of 0.00042 mm and the value of the uncertainty confidence level at 95% with a coverage factor of k = 2 is U95 = ±59.02 μm, vernier callipers II has a maximum error of 0.01994 mm and uncertainties confidence level at 95% with a coverage factor of k = 2 is U95 = ±59.42 μm. Both vernier callipers meets the requirements based on JIS B 7507-1993.Keywords: Metrology, Calibration, Vernier Calliper

Studi Kecermatan Alat Ukur Kebulatan (Roundness Tester Mechine) Produksi Laboratorium Pengukuran Universitas Riau

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Accuracy is the closeness or the accuracy of the measurement results with the actual value. Accuracy can also mean a measure of the closeness results of the analysis of the actual invitation analyte levels. Accuracy is vital that must be fulfilled and owned by any measurement tool, use the measuring instrument that has high accuracy and good will produce accurate measurement data and other wise use measuring devices are not accurate, do not meet the standards of the results obtained will not be accurate. This study aims to determine the value of the mandrel roundness deviation, roundness accuracy Measuring Equipment (Roundness Tester Machine) and large deviations in the roundness measuring instrument (Roundness TesterMachine) (instrument error) and the operator or gauges (human error). From the results, the large stroundness deviation value for minimum circumscribed circle is 0,474 mm, maximum inscribed circle 0,417 mm, minimum zone circle 0,495 mm, least squares circle 0,207 mm, for the value of sphericity (roundness) for the smallest outer for minimum circumscribed circleis 0,003 mm, maximum inscribed circle 0,003 mm, minimum zone circle is 0,003 mm, least squares is 0,001 mm. Value accuracy roundness measuring instrument (Roundness TesterMachine) in position 1 = 0,006 mm, position 2 = 0,006 mm, position 3 = 0,011 mm, position 4 = 0,018 mm, position 5 = 0,003 mm, position 6 = 0,018 mm, position 7 = 0,021 mm, position 8 = 0,031 mm, position 9 = 0,002 mm, position 10 = 0,001 mm and error measuring instrument (instrument error) is the largest 0,02944 mm or 18,871% and the smallest deviation is 0,00029 mm or 0,225%. Operator error or measuring (Human Error) for first test (human) 22%, second test 5,33%, third test 182%, fourth test 187%, fifth test 58%.Keywords: Accuracy, Deviation, Human error, Roundness Tester Machine.

Kalibrasi Jangka Sorong Jam Ukur (Dial Calliper) Dengan Menggunakan Metode Standar JIS B 7507 - 1993 Di Laboratorium Pengukuran Teknik Mesin Universitas Riau

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The calibration of dial calliper is the form of activity to determine the truth of the conventional value by using measuring ruler with the measuring clock as the substitute of a nonius scale. The degree of accuracy from a dial inching ruler is the same as the nonius inching bar, 0.10 mm, 0.05 mm or 0.02 mm. On the dial inching bar with the accuracy of 0,10 mm by using the standard JIS B 7507-1993 method. As a result of analysis, the uncertainty value of the measuring instrument from dial caliper I at a rate of trust 95% with a coverage factor of k = 2 is U95 = ± 9.50 . The uncertainty value of the dial caliper II at a rate of trust 95% with the coverage factor k = 2 is U95 = ±9,50 . The uncertainty value of the dial caliper III at a rate of trust 95% with the coverage factor k = 2 is U95 = ±9,50 . Measurement error / deviation measuring clock caliper (dial calliper) I and II with the measuring block measuring 150 mm is 0.00007 mm. While the clock measuring caliper (dial calliper) III with the measuring block measuring 150 mm is -0.04993 mm. Based on the table errors that allowed JIS B 7507-1993 is ± 0.07 mm so caliper measuring clock (dial calliper) I, II and III are still within the allowed tolerance limit mistakes and still feasible to be used.Keywords:Calibration, Calliper, Dial Calliper,Standard JIS B 7507-1993

Kalibrasi Mikrometer Sekrup Eksternal Dengan Mengacu Pada Standar JIS B 7502 - 1994 Di Laboratorium Pengukuran Teknik Mesin Universitas Riau

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Activities to determine the truth value of the appointment of a conventional measuring instruments and measuring ingredients by comparing against a standard measure that traceable to a national standard for the unit of measure and internationally is the purpose of the calibration so that the existing external micrometer screw in Mechanical Engineering Laboratory Measurements can be seen Riau University how much difference deviation between the right price with the price indicated by an external micrometer screw. In the external calibration process micrometer screws there are six components , namelymeasurement uncertainty: Uncertainty measuring gauge block, standard uncertainty micrometer resolution , standard uncertainty able to re- reading of the micrometer , standarduncertainty the effect of temperature , standard uncertainty geometric correction , wringing standard uncertainty. As a result of analysis obtained values Value uncertainty of measuringdevices external I micrometer screw at a rate of 95% coverage factor of k = 2 is U95 = ± 5,8092 mm with a gauge factor correction tool = 0,00025 mm. The uncertainty of the value ofan external measuring instrument micrometer screw II at a rate of 95% coverage factor of k = 2 is U95 = ± 5,8092 mm by measuring factor correction tool = 0,00025 mm. The uncertaintyof the value of an external measuring instrument micrometer screw III equal to 95% coverage factor of k = 2 is U95 = ± 5,8092 mm and measuring instrument correction factor = 0,00975 mm.Keywords: Dimensional metrology , calibration , micrometer , uncertainty

Pengujian Kebulatan Hasil Pembuatan Poros Aluminium Menggunakan Emco T.U CNC - 2A Smkn 2 Pekanbaru Dengan Roundness Tester Machine

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Lathing process is one of the main processes in the manufacturing industry. In the process of turning a product at TU EMCO CNC machine -2a SMKN2 Pekanbaru possible deviations from predetermined geometric characteristics. Aluminium is a light metal having corrosion resistance and good electrical conductivity. In the process of making a product (workpiece) is meticulous, the deviation of the shape, position, place, and rotate deviation to wardsan element geometry (point, line, surface or intermediate area), should be clearly limited to the value of a certain tolerance. Tolerance limits the form of deviation, position and place on aswivel deviation geometric element is referred to as geometric tolerances. Roundness and diameter are the two different geometric character, though interrelated, the lack roundness will affect the measurement results diameter, other wise the measurement of the diameter is not always going to show lack non roundness. From the results, the value of the roundness deviation of each variation of the feeding speed on the machine for the Minimum circumscribed circle feeding speed difference deviation 20 is between 0,011mm to 0,115 mm. feeding speed 40 is between 0.023 mm to 0.063 mm.feeding speed 70 is between 0.040 mm to 0.144 mm. On the Maximum incribed circle speed difference deviation 20 is between 0,007 mm to 0,100 mm. feeding speed 40 is between 0.025 mm to 0.059 mm. feeding speed 70 is between 0.010 mm to 0.108. In the Minimum zone circle feeding speed difference deviation 20 is between 0.011 to 0.109 mm. feeding speed 40 is between 0,024 mm to 0,076 mm. feeding speed 70 is between 0.044 mm to 0.092 mm. At Least Squares Circle feeding speed difference deviation 20 is between 0.008 to 0.029, feeding speed 40 is between 0.005 mm to 0.053 mm. 70 feeding speed is between 0,021mm to 0,047 mm.Roundness deviation value and average Least squares circle every variation of feeding speed, then at a feeding speed of 20 near-perfect roundness deviation value after deducting the correction factor Roundness Tester Machine tools, namely between -0.017 mm to 0,023 mm and the average value of 0.0037 mm.Keywords: feeding speed, Deviation, Roundness Tester Machine.

Desain Dan Manufaktur Mekanisme Pelubang Tanah Mengggunkan Sistem Tugal Pada Tilling Machine Untuk Pemupukan Kelapa Sawit

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Generally, the agriculturist applying the fertilization method by spread fertilize around the plants. This procedure is efficient enough but its effectiveness is poor. Fertilizer applicationby immersing in palm disc area will increase the efficient and effective uptake of NPK by plants, furthermore increase plants productivity, save the quantity of fertilize application, anddecrease environmental pollution. The purpose of this research is to design and create tugal in masking fertilize palm that capable of rapidly perforation. The method of this research is used to get information about the fertilization technique. After finding the information process, measurement tools that already exist is done, its used plow or tilling machine, the toolredrawn and tugal revelation which be install on tools. After the drawing had done, do the print out of drawing, furthermore do the manufacturing process. According to the calculated, we get tugals diameter design was 7,62 cm, length 20 cm, whereas tugals position within 44,48 cm from central wheel, the maximum safety factor was 15, whereas displacementmaximum 0,02054 mm and displacement minimum 0 mm, the result shows that tugals system is save to used. Time fertilization system manual unknown 3 hours, 30 minutes perhectar, whereas fertilization with tugals system was shorter time, that is 1 hours 28 minutes.Keywords: land punch, tugal, fertilization mechanism.

Desain Dan Manufaktur Hopper Penyalur Pupuk Menggunakan Valve Metering Mechanism Pada Cultivator Untuk Pemupukan Kelapa Sawit

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Fertilization plays an important role in increasing the production of palm oil. Fertilization by manually deployed using the hand is considered less effective because the dose of fertilizer is not uniform and improper fertilization methods. The purpose of thisresearch is to design and make the hopper (tank fertilizer distributor) for precise fit required dose and volume of uniform fertilizer for each tree. The case study method is used to getinformation about fertilization technique and dose of fertilizer. The information obtained is used to design and acquire the dimensions, the shape of the hopper is made. Design methodusing descriptive design french. Once the image is finished then print out the pictures do the work that will be done the manufacturing process. From the calculation and testing obtained capacity ofthe reservoir tank is 7.5 liters, volumemetering 1 0:09 L, metering 2 0.17 L, metering 30.26 L with dimensions of 200 mm × 150 mm × 283 mm. From the simulation results obtained structural analysis of the maximum value of the safety factor 15 minimum safety factor of 3.49, while the maximum displacement and displacement 0.04568 minimum 0 results shows that the hopper is safe to use. Hopper performance results have been obtained through the testing process with an average dose of the valve 1 0.07 kg (urea), 0.08 kg (TSP), valve 2 0.12 kg (urea), 0.14 kg (TSP fertilizer), and valve 3 0.17 kg (urea), 0.19 kg (TSP).Keywords: Design, fertilizationtechnology, fertilizationmechanisms, valve metering mechanism. 

Pengaruh Variasi Kecepatan Putaran Benda Kerja Dan Kedalaman Pemakanan Terhadap Kekarasan Permukaan Proses Gerinda Silinderis Dengan Center Pada Baja Aisi 4140

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Cylindrical grinding is a fundamental process in the final machining a component that requires a smooth surface roughness and precision tolerances. Cylindrical grinding processparameter variations, among others, the speed of rotation of the workpiece and the depth of cuts. This study used three variations of round rotation workpieces are low speed (83 rpm),medium speed (194 rpm) and high speed (304 rpm). Likewise with varying depth of cut is 0.005 mm, 0.010 mm, 0.015 mm. The average value of surface roughness of AISI 4140 steelcylindrical grinding tolerances based on the value of the average surface roughness / Ra are as follows : Class N7 roughness , Ra 1.6 , Tolerance ( m) ( + 50 % and - 25 % ) is 1.2 to 2.4 , asample length of 0.8 mm. The level of the average surface roughness according to the work cylindrical grinding results Steel AISI 4140 are as follows: Working Process is finishing, Hose ( N ) N4 - N8 , Ra 0.1 to 3.2. Parameters workpiece rotation speed and depth of cut for surface roughness cylindrical grinding process AISI 4140 steel workpiece is rotating speed194 rpm and 0,010 mm depth of cuts .Keywords: Cylindrical Grinding, Rotation Speed, Depth of Cuts, Surface Roughness.