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All Journal Jurnal Teknik Mesin Rekayasa Mesin Info-Teknik JURNAL PENGABDIAN KEPADA MASYARAKAT JOURNAL OF SCIENCE AND APPLIED ENGINEERING Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Jurnal Energi dan Teknologi Manufaktur Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Journal of Welding Technology Otopro JURPIKAT (Jurnal Pengabdian Kepada Masyarakat) Jurnal Pengabdian Polinema Kepada Masyarakat Jurnal Pengabdian dan Pemberdayaan Nusantara (JPPNu) Bulletin of Science Education Jurnal Pengabdian Kepada Masyarakat Journal of Mechanical and Electrical Technology Logic : Jurnal Rancang Bangun Dan Teknologi Jurnal Teknik Mesin, Industri, Elektro dan Informatika Asian Journal Science and Engineering Journal of Mechanical Engineering Venus: Jurnal Publikasi Rumpun Ilmu Teknik Journal of Evrimata: Engineering and Physics Journal of Community Engagement
Kris Witono
Jurusan Teknik Mesin Politeknik Negeri Malang
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Journal : Info-Teknik

 1 
ANALISIS PERBANDINGAN SIFAT MEKANIS PIPA TEMBAGA AC BARU DAN BEKAS R.N. Akhsanu Takwim; Kris Witono; Bambang Irawan
INFO-TEKNIK Vol 19, No 2 (2018): INFOTEKNIK VOL. 19 NO. 2 DESEMBER 2018
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jit.v19i2.158

Abstract

In the repair of the installation of air conditioners or refegeration are oftenfound referigeran (ACR) tube that must be replaced because the old copper tubeleaked on the connection. Replacement is done because the repair of the connectionby cutting and flaring the connection usually fails in the form of a tear on the flaredpart.The cause of flaring failure in the used air conditioner tube by testing themechanical properties and the microstructure of the material and compared with themechanical properties and the microstructure of the new tube material.Knowing thecauses of the failure can be searched for the prevention and repair solutions so thatthe old tube can be used without replacement.The tensile test results showed that the average ultimate strength of the usedACR copper tube has increase in strength of 18188.65 N/mm2 comparing with theultimate strength of the new copper tube which was only 14615.15 N/mm2.The microVickers test results show the same phenomenon from the tensile test results, wherethe hardness value of used ACR tube has 42.7 HV while the new ACR tube is 37.8HV.Microstructure testing with SEM shows the changing in grain structure from alongitudinal shape with a large enough grain size and tenuous in a new tube, to moreflat and dense longitudinal grain structure for used tube.
PENGARUH TEMPERATUR ANELING TERHADAP KEKERASAN DAN KEKUATAN PIPA TEMBAGA AC BEKAS R. N. Akhsanu Takwim; Kris Witono; Pondi Udianto
INFO-TEKNIK Vol 20, No 2 (2019): INFOTEKNIK VOL. 20 NO. 1 DESEMBER 2019
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v20i2.7717

Abstract

During the installation process, copper pipes for air conditioning will experience a very large deformation due to straightening and bending following the installation path. Hardening strains occur that result in changes in mechanical properties in this case decreases ductility making it difficult to do the connecting process with flaring. Studies need to be carried out to restore the mechanical properties of copper pipes that have been used, including the heat treatment process on copper pipes, so that used copper pipes have a better benefit value than having to be recycled. The temperature of the heat treatment is varied from 400oC, 500 oC and 600 oC. Tensile test results show that at annealed temperature of 400 oC has the highest tensile strength of 125.81 N / mm2 and proportional limit stress of 40.52 N / mm2. Whereas in the microhardness test, the highest hardness occurs also at annealed temperature of 400 oC which is equal to 50.8 HV.
EFFECT OF HEAT TREATMENT TEMPERATURE ON THE FORMATION OF DUAL PHASE STEEL AISI 1005 HARDNESS AND FLEXURE STRENGTH CHARACTERISTICS OF MATERIALS Kris Witono; Lisa Agustriyana; Agus Setiawan
INFO-TEKNIK Vol 16, No 1 (2015): INFOTEKNIK VOL. 16 NO. 1 2015
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v16i1.208

Abstract

Any material intended for automotive use, especially in the body panels must have the criteria able to form (formable), weldability (weldable), coatable (resistant to corrosion) and able to be repaired (repairable). One group of materials that meet all the above requirements are dual phase steel. To form a dual phase steel can be done through a process of heat treatment.The purpose of this study was to determine the effect of heat treatment temperature on the formation of a dual phase of the material hardness properties and flexural strength steel.The method used is a variation of the process of heat treatment at temperature 7300C, 7500C, 7700C, 8000C, 8500C, 9000C.The results of the study include the establishment of dual phase steel can improve the hardness of AISI 1005 steel with a carbon content of 0.033% C, the highest value of flexural strength is obtained at a temperature of 770 ° C treatment that is 1.98 kg / mm2 with 223.08 HV hardness values. The hardness and flexural lowest strength obtained at the treatment temperature of 900 ° C is 197.14 HV and 1.15 kg / mm2 and dual phase steel with optimum mechanical properties obtained at a temperature of 770 ° C. Key word : heat treatment, dual phase, hardness, flexure strength
PENGARUH VARIASI POSISI PEMASANGAN DAN ARAH ALIRAN FLUIDA TERHADAP KINERJA VENTURI VAKUM R. N. Akhsanu Takwim; Kris Witono
INFO-TEKNIK Vol 20, No 1 (2019): INFOTEKNIK VOL. 20 NO. 1 JULI 2019
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v20i1.6956

Abstract

A liquid fluid flow that is driven by a centrifugal pump past the ventury channel needed to produce the vacuum conditions at the ventury vacuum pump. The amount of vacuum pressure produced by ventury is influenced by the increase of flow rate due to the channel cross section that follows the Bernoulli principle. The flow rate on the channel is affected by the discharge generated by the pump that follows the law of continuity. In addition to speed, the pressure of channel input is also a variable that affects ventury vacuum pressure. Pressure losses and flow discharge caused by the connection or turn of the pipe arising from the installation design, will affect the performance of the Setrifugal pump in the form of discharge flow and pressure that ultimately strongly affects the rally Venturi vacuum work. Therefore, it is necessary to evaluate the influence of the design of the istalation associated with the position of ventury mounting and the direction of the flow to the pressure and discharge of the vacuum to be the primary purpose of this research so that the variables are obtained The performance of a ventury vacuum pump. In this research the placement of vacuum ventury in several positions, namely vertical position, horizontal position and tilt position 45o. Then measured parameters are occurring, such as discharge fluid flow, liquid fluid pressure and vacuum pressure occurring on the pipe. From this study obtained optimum performance on the installation with a sloping ventury position of 45o with the direction of the downward flow, which resulted in the lowest vacuum pressure of-65 CmHg with ventury suction flow of 33.01 liters/minute.
LAJU PENDINGINAN PENGELASAN BAJA CARBON SEDANG PADA TEMPERATUR LINGKUNGAN BERBEDA R. N. Akhsanu Takwim; Kris Witono; Pondi Udianto
INFO-TEKNIK Vol 21, No 1 (2020): INFOTEKNIK VOL. 21 NO. 1 JULI 2020
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v21i1.8964

Abstract

The quality of welding results is influenced by the shape of the microstructure of the welding material especially in the HAZ region. The shape of the welding microstructure is largely determined by the cooling rate of the weld material. The cooling rate of the weld is greatly influenced by the heat input from the arc and the ambient temperature. This study aimed to determine the effect of different environmental temperatures on the cooling rate of welding results. Welding of GMAW fillets on medium carbon steel plates S50C, with variations in welding currents 90 A, 100A and 110A and carried out at variations in environmental temperature of 15oC, 10oC and 5oC. Temperature data on the middle, welding part is taken with a digital thermometer to compare the effect of each variable. The test results show that the greater the welding current, the slower the cooling rate. Similarly, an increase in ambient temperature causes a decrease in the weld metal's cooling rate.
ANALISIS UNJUK KERJA VENTURI VAKUM DENGAN VARIASI DIMENSI DAN VISKOSITAS FLUIDA R.N. Akhsanu Takwim; Kris Witono
INFO-TEKNIK Vol 19, No 1 (2018): INFOTEKNIK Vol. 19 No. 1 Juli 2018
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v19i1.5142

Abstract

In the venturi vacuum, to produce a vacuum condition, a liquid fluid flow is required which is driven by a centrifugal pump through the venturi passage. The amount of vacuum pressure generated by venturi is influenced by the increase of flow velocity due to the diminution of the cross-section which follow Bernoulli principle. The flow velocity on the channel is influenced by the discharge generated by the pump following the continuity law. In addition to speed, channel input pressure is also a variable that affects venturi vacuum pressure. Performance of a setrifugal pump in the form of flow and pressure discharge greatly affect venturi vacuum performance, so that the variables affecting the performance of a setrifugal pump such as fluid viscosity, will also affect the venturi vacuum performance. Therefore, it is necessary to evaluate the effect of viscosity and venturi dimension on vacuum pressure and discharge into the main objective of this study so that the variables can improve the venturi vacuum pump performance. In this study liquid fluid with three variations of viscosity flowed through three different venturi dimension variations. Then measured parameters that occur, such as fluid flow fluid flow, fluid pressure fluid and vacuum pressure that occurs in the tube. From this study obtained, at the angle of diffuser 5o the lowest vacuum pressure of - 66.75 cmHg occurs in water fluid with viscosity of 17 centipoise. Similarly, at the angle of the diffuser 6.5o the value of the lowest vacuum pressure is also produced by a water fluid of -68 cmHg which is the lowest value compared to other diffuser angles and other fluid viscosities. While at 8o diffuser angle, the lowest vacuum pressure value is also produced by water fluid of -64.5 cmHg.
PENGERASAN (HARDENING) RODA GIGI SPROCKET SEPEDA MOTOR DENGAN VARIASI WAKTU PENAHANAN DAN MEDIA PENDINGIN Kris Witono; Subagiyo Subagiyo
INFO-TEKNIK Vol 18, No 1 (2017): INFOTEKNIK Vol. 18 No. 1 2017
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v18i1.3883

Abstract

Motorcycle problems with large (cylinder / cc) engines are generally located on the sprocket gears that are rapidly wearing wear. The objective of this study was to increase the hardness of sprocket gears, while improving their wear resistance through hardening heat treatment process with variation of holding time and cooling medium. The research method included heating the specimen up to its critical temperature (850 ° C), retained with variations of holding time of 30, 60, and 90 minutes, then cooled rapidly (quenching) on water cooling, brine, and oil variations. The results showed an increase in the hardness of sprocket gears, with maximum hardness increases occurring at 30 minutes and 30 minutes of brine cooling.
Co-Authors Abd. Muqit Agus Hardjito Agus Harijono Agus Setiawan AGUS SETIAWAN Agus Sujatmiko Akhlis Rizza, Muhammad Akhmad Faizin Akhmad Faizin Akka Sunoko Amrullah, Miftahul Asrori , Asrori Asrori Asrori Bagus Wahyudi Bambang Irawan Bambang Irawan Bayu Pranoto Bima Cahya Maula Dana Budi Eko Prasetyo Danang Risky Suhadi Dani, Agus Duratun Nasiqiati Rosady, Siti Eka Perkasa, Rilis Eko Yudiyanto Elka Faizal Elka Faizal Etik Puspitasari Etik Puspitasari, Etik Faizal, Elka Gumono Gumono Gunawan, Chandra Hadi Samsul Hadi Susilo, Sugeng Hangga Wicaksono Hangga Wicaksono Harijono, Agus Haris Puspito Buwono Heru Prasetyo Heru Suryanto Heryanto Heryanto Kasijanto Kasijanto Kasijanto, Kasijanto Lisa Agustriyana Listiyono Moh. Nasir Mohammad Noor Hidayat Muhammad Fakhruddin NASIR, MOH. Nugroho, Pipit Wahyu Nurhadi Pondi Udianto Pranoto, Bayu Purwoko Purwoko Putu Wijaya Sunu R.N. Akhsanu Takwim, R.N. Akhsanu Rahmad, Cahya Raihan Insan Nararya Ratna Monasari Rifa’i, Muhamad Riskitasari, Septyana Risno Bayu Riswan E.W. Susanto Riswan E.W. Susanto Robbi Malik Rudy Soenoko Sadar Wahjudi Samsul Hadi Sarjiyana Satworo Adiwidodo SEPTYANA RISKITASARI Siti Duratun Nasiqiati Rosady Subagiyo Subagiyo Sugeng Hadi Susilo Sugeng Hadi Susilo Sulistyono Sulistyono Syamsul Syamsul Hadi Syamsul Ph.D M.A. Hadi Talifatim Machfuroh Talifatim Machfuroh Talifatim Machfuroh, Talifatim Walid, Achmad Wicaksono, Hangga Wirawan , Wirawan Yudy Surya Irawan Yuniarto Agus Winoko Zakki Fuadi Emzain