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All Journal Jurnal Penelitian Saintek INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN

Tiwan Tiwan

Universitas Negeri Yogyakarta

Author-ID : 403996

Arts Humanities Computer Science & IT Decision Sciences, Operations Research & Management Education Mechanical Engineering Social Sciences

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Articles

ANALYSIS OF ELECTRONIC MATERIAL USE OF BASIC MATERIALS, IN EMS STEEL EDM PROCESS 45 REVIEWED FROM THE ASPECTS OF ELECTRODES OF MASS REDUCTION AND SURFACE DAMAGE Tiwan Tiwan
Jurnal Penelitian Saintek Vol 12, No 1: April 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The aim pf this research is to analyze characteristic of Cu-based material that has been used as electrode in EDM process. The research variables are wearness off electrode, weightloss and roughness of specimens of EMS 45 steel.Experimental methode was used in this research, which consists of preparation process and EDM test, EDM process, characterization and testingprocess. Analysis was done based on characterization and testing process. Testing process comprises electrode wearness, weightloss and roughness of the specimen.The result show that wearness of brass electrode is higher than bronze electrode. However, bronze electrode gives rapid weight loss. At current of 45 A and pulse on time 3 s, weight loss of EMS 45 steel was1,8 timefaster using bronze electrode, but wearness of brass electrode was 18,67 times faster. Surface roughness of EMS 45 steel was smoother using bronze electrode. Weight loss of EMS 45 steel and electrode wearness affected by current andpulse on time. Nevertheles, surface roughness of EMS 45 influenced by current, but not bypulse on time.

Pengaruh Praktik Industri Terhadap Hard Skill Siswa SMK pada Program Keahlian Teknik Pemesinan Yudha Dwi Prasetyo; Tiwan Tiwan; Arianto Leman Soemowidagdo
Jurnal Dinamika Vokasional Teknik Mesin Vol. 3 No. 2 (2018): Oktober
Publisher : Department of Mechanical Engineering Education

The implementation of industrial practices is expected to improve skills, verbal abilities, and can provide creative ideas for students in developing skills that have been raised to create the right innovation. This research aims to determine the implementation of industrial attachment for the students of machining study program, and the influence of industrial attachment on the students' hard skill. This research used ex-post facto method with a quantitative approach. The subjects were class XII students of machining study program with a total sample of 98 students. Data were collected using questionnaire and documentation. Data were analyzed using Pearson's product moment correlation and simple regression analysis. Results show that the implementation of industrial attachment for students of machining study program is categorized as "˜high' (69,38% in average), and that there is as a positive and significant effect on the students' hard skill.Pelaksanaan praktik industri diharapkan mampu meningkatan keterampilan, kemampuan verbal, dan dapat memberikan ide-ide kreatif bagi siswa dalam mengembangkan keterampilan yang telah dimilikinya untuk membuat inovasi produk tepat guna. Penelitian ini bertujuan untuk mengetahui keterlaksanaan praktik industri siswa Teknik Pemesinan, dan pengaruh praktik industri terhadap hard skill siswa. Penelitian ini menggunakan metode ex-post facto dengan pendekatan kuantitatif. Subyek penelitian adalah siswa kelas XII program keahlian Teknik Pemesinan dengan jumlah sampel 98 siswa. Metode pengumpulan data dengan metode kuesioner dan dokumentasi. Teknik analisis data menggunakan teknik korelasi product moment dari Pearson dan dilakukan uji analisis regresi sederhana. Hasil penelitian menunjukkan bahwa keterlaksanaan praktik industri siswa teknik pemesinan rata-rata temasuk kedalam kategori tinggi 69,38%, dan praktik industri berpengaruh positif dan signifikan terhadap hard skill siswa. Hubungan yang diperoleh adalah semakin tinggi tingkat pelaksanaan praktik industri, maka semakin tinggi pula hard skill-nya dan bidang pekerjaan memiliki pengaruh tinggi terhadap nilai praktik industri siswa teknik pemesinan

Karakterisasi Grinding Balls Produksi CV Baja Ellips Arianto Leman; Tiwan Tiwan; Nurdjito Nurdjito
Jurnal Dinamika Vokasional Teknik Mesin Vol. 3 No. 1 (2018): April
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v3i1.19115

This research is aimed to study the characteristics of cast grinding balls produced by CV Baja Ellips Ceper, Klaten. The samples were taken from three tapping. One group was quenched in water while the other was not. The studied characteristics comprised of chemical composition, microstructure, hardness and wear. The result shows that the grinding balls have the chemical composition of medium-strength cast iron. However, the microstructure shows cementite and pearlite that indicates the structure of a white cast iron. The hardness of quenched and unquenched grinding balls are 60 HRC and 57 HRC, respectively. The hardness is consistent from the edges to the middle of the grinding balls. The specific wear of quenched grinding balls and unquenched grinding balls is 3.32963 x 10-06 mm2/kg and 5.032 x 10-06 mm2/kg, respectivelyPenelitian ini bertujuan untuk mengetahui karakteristik grinding balls produksi CV Baja Ellips Ceper Klaten yang dibuat dengan menggunakan proses pengecoran. Sampel grinding balls diambil dari tiga kali tapping yang berbeda. Satu kelompok dicelup dingin dalam air dan yang tidak dicelup dingin. Karakterisasi yang dilakukan meliputi komposisi kimia, struktur mikro, kekerasan dan keausan. Hasil penelitian menunjukkan bahwa komposisi kimia dari bola penggiling termasuk dalam kelas besi tuang kekuatan sedang. Struktur mikro yang tampak adalah sementit dan perlit yang menunjukkan struktur besi tuang putih. Kekerasan grinding balls yang dicelup dingin adalah 60 HRC sedangkan yang tanpa dicelup dingin sebesar 57 HRC. Kekerasan grinding balls konsisten dari bagian tepi sampai bagian tengah. Keausan spesifik grinding balls yang dicelup dingin dan tanpa dicelup dingin berturut-turut 3,32963 x 10-06 mm2/kg dan 5,032 x 10-06 mm2/kg

RANCANG BANGUN MESIN PENGADUK ADONAN BAHAN DODOL BATANG DAN BUAH PEPAYA UNTUK MENINGKATKAN KAPASITAS PRODUKSI INDUSTRI KECIL DI PEDESAAN tiwan, Tiwan
INOTEKS: Jurnal Inovasi Ilmu Pengetahuan,Teknologi, dan Seni Vol 14, No 1 (2010)
Publisher : Universitas Negeri Yogyakarta

This community service activity of appropriate technology based leading program aims to support solving the problem faced by small home industries KUB "DHARMA MAKMUR" in the stirring process of homogenizing delicacy dough substance of papaya stem and fruit. This stirring process is the beginning activity of the production process of the papaya stem and fruit delicacy. To solve the problem faced by the working partner, this appropriate technology based community service program focuses on the stirring machine construction followed by the training activity using the methods of: (1) designing the machine compromised to the working partner needs, (2) lecture of machine working principles, (2) demonstration of the machine operation training, (3) field practice to equip the skills for the members of the home industry of KUB "DHARMA MAKMUR". The product of this community service activity is the realization of a mixing machine unit to stir delicacy dough of papaya stem and fruit having the specifications of: (1) dimension of length x width x height=60x50x80 cm, and (2) electric motor of 0,5 HP. The machine operation technique and safety are conducted by turning the machine on until the normal speed of the stirring plate rotation and adjusting the stirring plate rotation speed considering the delicacy dough being mixed. The productivity of the machine produced by this appropriate technology based community service leading program can be eight to ten times quicker compared to working with manual equipments.

MESIN PENGANYAM KAWAT STRIMIN UNTUK INDUSTRI KECIL Tiwan, Tiwan; Hantoro, Sirad
INOTEKS: Jurnal Inovasi Ilmu Pengetahuan,Teknologi, dan Seni Vol 1, No 1 (1999)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ino.v1i1.5091

Program Vucer ini bertujuan untuk mernbantu industri kecil dalam hal pengembangan teknologi pembuatan anyaman sawat strimin, Yang menjadi sasaran dalam program ini adalah para pengusaha industri kecil yang bergerak dalarn bidang:<".'mbuatankawat strimin. Upaya yang dapat dilakukan untuk menyelesaikan permasalahan yang dihadapi industri kecil yang bergerak dalam usaha:<".'nganyamankawat strimin adalah membantu dalam hal peningkatan teknologinya. Adapun langkah-langkah yang dapat... kukan adalah: pengkajian mesin penganyam kawat, perencanaan mesin penganyam kawat strimin, pembuatan gambar--: a, penetapan jadwal kerja, pelaksanaan pembuatan mesin. assembling mesin, uji cob a mesin, evaluasi hasil, dan- ~-empumaan. Adapun spesifikasi mesin penganyam kawat strimin yang dibuat adalah sebagai berikut: panjang J 000 mm, lebar 400- tinggi J 050 mm, tinggi meja 800 mm. Penggerak motor listrik 1 phase. P=] PK, n = 1450 rpm. Transmisi: Puley & belt,-_'::.Jcer, roda gigi, kopling. Dais pembentuk Pitch 60 dan Pitch 40. Putaran kerja 50 rpm, panjang Meja anyam 2000 mm,- ~~. meja anyam 890 mm. Berdasarkan dari hasil kegiatan ini maka dapat disimpulkan bahwa kegiatan ini sangat bermanfaat am usaha pengembangan industri kecil. Dari hasil uji coba mesin penganyam kawat yang dibuat sudah dapat beroperasi~ "-3..i dengan permintaan industri kecil, danjika dilihat dari hasil kerjanya. mesin ini lebih cepat dan hasilnya lebih baik.

Co-Authors Nurdjito Nurdjito Sirad Hantoro, Sirad Yudha Dwi Prasetyo

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