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All Journal Journal of Welding Technology Perwira Journal of Science and Engineering (PJSE)
Surjo Abadi
Universitas Kristen Indonesia
Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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The Effect of Weld Current and Weld Time on the Push Test, Nugget and Penetration Depth of Steel Plate SPFC590 with Weld T-Nut M10 Ardhi Alfarizzi Tanjung; Budiarto Budiarto; Surjo Abadi
Journal of Welding Technology Vol 5, No 1 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v5i1.3651

Abstract

This study explains the effect of the parameters of current strength and welding time. The welding process uses SPFC590 t1.2 steel plate material and Weld T-Nut M10 with a 50 kVA Dagensha brand spot welding process. The purpose of this research is to analyze the push test, nugget, and depth of penetration against engineering standards from PT HMC (Hyundai Motor Company). Using the factorial experimental design method to convey test layout formulations, understand the best conditions for setting machine parameters, and knowing the performance effect of parameter settings such as push tests, nuggets, and depth of penetration spot welding. The results of the push test between the SPFC590 t1.2 steel plate and Weld T-Nut M10 are the largest 17.7 kN and the smallest 15.4 kN. the test results have passed the results of the 6.5 kN engineering standard. Test results on nuggets the longer the melting occurs the wider the growth of the melt, and after the part is at room temperature the melting zone will become a nugget, for the average nugget test result is 5.6 mm and has passed the standard engineering results. Whereas in the penetration test the longer the welding time the deeper the penetration depth. The results showed that the parameters of current strength and welding time can affect the results of the size of the nugget and the depth of penetration of spot welding, but can reduce the strength of the push test. besides that the less the remaining plate that is not affected by penetration the smaller the strength of the push test, and the less depth of penetration. The smaller the strength of the push test and the higher the current strength and welding time, the larger the nugget size obtained.
Analisis pengaruh akumulasi pengotor pada filler terhadap kinerja cooling tower tipe induced draft counterflow di pabrik industri kimia PT. XYZ: Bahasa Indonesia Eric Samuel; Leonard Lisapaly; Surjo Abadi
Perwira Journal of Science & Engineering Vol 5 No 2 (2025)
Publisher : Universitas Perwira Purbalingga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54199/pjse.v5i2.523

Abstract

PT. XYZ merupakan perusahaan yang bergerak dibidang industri kimia, khususnya memproduksi berbagai macam produk bahan kimia. Cooling tower menjadi salah satu komponen penting dalam sistem pendingin di industri kimia untuk mendukung proses sistem pendinginan dengan cara mengontakan air dengan udara sekitar, sehingga air menjadi dingin. Cooling tower tipe induced draft counterflow yang digunakan mengalami permasalahan pada filler yaitu terbentuknya akumulasi pengotor seperti debu, lumpur, dan mikroorganisme. Tujuan dari penelitian ini adalah untuk menganalisis pengaruh pengotor yang terbentuk pada filler terhadap kinerja cooling tower, serta memberikan wawasan untuk mengatasi terbentuknya pengotor tersebut. Analisis dalam penelitian ini dilakukan dengan menggunakan metode range, approach, efektivitas pendingin dan kapasitas perpindahan panas. Berdasarkan hasil penelitian ditemukan bahwa terbentuknya akumulasi pengotor pada filler menyebabkan kenaikan suhu air pendingin dari 30°C menjadi 33°C, penurunan efektivitas cooling tower sebesar 17.8%, dan kapasitas perpindahan panas juga menurun dari 686.3 kW menjadi 274.5 kW. Hal ini menunjukan bahwa pengotor yang menempel pada filler mengganggu proses perpindahan panas pada cooling tower sehingga diperlukan perawatan secara berkala untuk menjaga kinerja sistem pendingin.
Co-Authors Ardhi Alfarizzi Tanjung Budiarto Eric Samuel Leonard Lisapaly