Perancangan Ulang Mesin Roll Bending Untuk Pipa Stk 41 Dengan Diameter 4 Inch

Taufiqurahmat, Muhamad Isnaini (2026) Perancangan Ulang Mesin Roll Bending Untuk Pipa Stk 41 Dengan Diameter 4 Inch. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proses pengerolan pipa STK 41 berdiameter 4 inci pada unit produksi saat ini menggunakan mesin 3-roll piramid bekas yang tidak memiliki spesifikasi teknis. Ketiadaan parameter gaya tekan dan torsi yang pasti, sehingga terjadi ketidaksesuaian profil permukaan berupa kegagalan pembentukan pada 30 dari 50 material yang diproses. Penelitian ini bertujuan untuk melakukan perancangan ulang (redesign) pada mesin tersebut guna menetapkan parameter teknis operasional yang pasti untuk pengerolan pipa diameter 4 inci. Metodologi penelitian meliputi pengujian tarik material untuk mendapatkan karakteristik mekanik, simulasi strategi pengerolan multi-pass sebanyak 10 tahapan, serta perhitungan kekuatan komponen kritis.Hasil penelitian menunjukkan material memiliki nilai eksponen pengerasan regangan (n) sebesar 0,5746 dan koefisien kekuatan (K) sebesar 1021,17 MPa. Untuk mencapai radius produk akhir sebesar 494,52 mm, diperlukan kompensasi overbending dengan radius penekanan sebesar 483,14 mm guna mengatasi fenomena springback sebesar 11,38 mm. Gaya bending puncak tercatat sebesar 107,62 kN dengan kualitas hasil pengerolan yang memenuhi standar ASME B31.3, yakni tingkat ovalitas 3,784% dan penipisan dinding 8,738%. perancangan ulang ini juga memvalidasi keamanan komponen poros dan bearing tipe 22214EAW33C3 terhadap beban operasional maksimal, sehingga mesin mampu digunakan untuk meningkatkan akurasi hasil produksi.
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The current production unit's 4-inch diameter STK 41 pipe rolling process uses a used 3-roll pyramid machine that lacks technical specifications. The lack of definite pressure and torque parameters results in surface profile mismatches in the form of forming failures in 30 of the 50 processed materials. This study aims to redesign the machine to determine definite operational technical parameters for 4-inch diameter pipe rolling. The research methodology includes tensile testing of the material to obtain mechanical characteristics, simulation of a 10-stage multi-pass rolling strategy, and calculation of the strength of critical components. The results show that the material has a strain hardening exponent (n) of 0.5746 and a strength coefficient (K) of 1021.17 MPa. To achieve a final product radius of 494.52 mm, overbending compensation is required with a pressing radius of 483.14 mm to overcome the springback phenomenon of 11.38 mm. The peak bending force was recorded at 107.62 kN with the rolling quality meeting ASME B31.3 standards, namely an ovality level of 3.784% and a wall thinning of 8.738%. This redesign also validated the safety of the 22214EAW33C3 type shaft and bearing components against maximum operational loads, so that the machine can be used to improve the accuracy of production results.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	mesin roll bending, pipa STK 4, springback, multi-pass bending, roll bending machine, STK 41 pipe, springback, multi-pass bending
Subjects:	T Technology > TS Manufactures > TS156 Quality Control. QFD. Taguchi methods (Quality control) T Technology > TS Manufactures > TS280 Pipe Bending, Tube Bending
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Muhamad Isnaini Taufiqurahmad
Date Deposited:	02 Feb 2026 08:05
Last Modified:	02 Feb 2026 08:05
URI:	http://repository.its.ac.id/id/eprint/131682

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