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All Journal Turbo : Jurnal Program Studi Teknik Mesin Manutech : Jurnal Teknologi Manufaktur
Yokasing, Yohanes Benediktus
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Optimisasi Desain dan Kinerja Alat Kupas Kulit Polong Kacang Tanah yang Portable Yokasing, Yohanes Benediktus; Abdullah, Amiruddin; Johanis, Alexius L.; Putra Mandala, Aditya Christian
Manutech : Jurnal Teknologi Manufaktur Vol. 17 No. 01 (2025): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v17i01.466

Abstract

The peeling machine for peanut shells, which has limitations and achieves a peeling capacity of only 85%, requires optimization. To this end, the friction, pressure, and gravity involved are analyzed. The design concept of the peeling machine considers the topographic conditions, particularly in the East Nusa Tenggara (NTT) region. The result of this optimization produces the 'Peeling Machine for Peanut Shells.' The resulting peeling machine has the following specifications: height of 700 mm, length of 50 mm, width of 37 mm, operated manually, with a production capacity of approximately 0.86 ounces per second. The performance, in terms of rotation speed and the number of peeled peanuts, shows a significant correlation with increased capacity. Increasing the diameter of the blades also contributes to higher output. At a speed of 60 rpm, a closer blade distance (11 mm) yields the best results, indicating that the optimization of machine design needs to consider the blade distance in relation to the rotation speed to enhance efficiency.
Pengaruh Diameter Kawat dan Panjang Koil Pegas Tekan terhadap Defleksi pada Sistem Getaran Ayak Yokasing, Yohanes Benediktus; Santhiarsa, I.Gusti Ngurah Nitya; Parwata, I. Made; Lokantara, I. Putu
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4409

Abstract

The design of a vibration-based screening system requires adjustment of the compression spring characteristics to meet the required amplitude and working frequency. This study analyzes the effect of wire diameter (d) and spring coil length (No) on spring deflection (δ) and stiffness (k) as key parameters in the design of vibratory sieve systems. A quantitative approach was employed through deflection testing using a spring tester and performance graphs. The results show that increasing the wire diameter from 3 mm to 4 mm reduces deflection by up to 38% and increases spring stiffness by approximately 50%. Conversely, increasing the coil length from 80 mm to 120 mm raises deflection by about ±48%. The spring stiffness constant ranges from 2.4 N/mm to 3.8 N/mm, depending on the dimensional combination. The combination of d = 4 mm and No = 80 mm is suitable for low-frequency vibrations, while d = 3 mm and No = 120 mm is appropriate for high-frequency vibrations. These findings provide technical guidance for adjusting spring characteristics to match the vibration design targets of screening systems, particularly in the processing of both light and heavy materials.
Memformulasikan Rumusan Matematik untuk Nilai Defleksi Pegas Tekan dan Tarik Seiring Penambahan atau Pengurangan Diameter Kawat Baja Budayawaty, Irene; Yokasing, Yohanes Benediktus; Abdullah, Amiruddin
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.3780

Abstract

Artikel ini memaparkan pengembangan rumusan matematik untuk menghitung defleksi pegas tekan dan tarik baja seiring perubahan diameter kawat. Penelitian ini bertujuan memberikan model yang akurat dan sederhana untuk memprediksi defleksi pegas berdasarkan variasi diameter kawat, yang merupakan parameter penting dalam desain mekanik. Untuk pegas tekan, digunakan model matematik linear yang menunjukkan penurunan defleksi terhadap peningkatan diameter kawat, dirumuskan sebagai δ(d)=a-b.d. Sebaliknya, untuk pegas tarik, defleksi berbanding terbalik dengan pangkat diameter kawat, dan digambarkan melalui rumus δ = k⋅d^−n, di mana k dan n diperoleh melalui analisis regresi. Metode ini memungkinkan perancangan pegas yang lebih efisien dengan memperkirakan perubahan defleksi secara presisi sesuai kebutuhan beban kerja. Formulasi ini, desainer dapat menyesuaikan dimensi kawat pegas secara optimal untuk mencapai nilai defleksi yang diinginkan. Penelitian ini menyimpulkan bahwa pendekatan matematik yang disesuaikan dengan jenis pegas dan parameter material dapat meningkatkan ketepatan prediksi defleksi, sehingga memperbaiki performa dan efisiensi dalam aplikasi industri.
Co-Authors Abdullah, Amiruddin Budayawaty, Irene Johanis, Alexius L. Lokantara, I. Putu Parwata, I. Made Putra Mandala, Aditya Christian Santhiarsa, I.Gusti Ngurah Nitya