Perencanaan Sistem Mekanikal Pusher pada Mesin Positioner Trailing Leaf Spring (Studi Kasus di PT Indospring Tbk - Gresik)

Ramadhani, Ahmad Syahru (2026) Perencanaan Sistem Mekanikal Pusher pada Mesin Positioner Trailing Leaf Spring (Studi Kasus di PT Indospring Tbk - Gresik). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT Indospring Tbk melakukan relayout dua lengan robot pada heating line plant 2 untuk meningkatkan produktivitas proses material handling trailing leaf spring. Namun, tata letak basis robot yang tidak sejajar serta geometri trailing leaf spring yang asimetris berpotensi menyebabkan titik gripping robot tidak berimpit dengan pusat massa material. Kondisi tersebut dapat menimbulkan momen eksentris pada robot, meningkatkan risiko slip saat proses pemindahan material, serta memengaruhi kualitas produk. Untuk mengatasi permasalahan tersebut dilakukan perencanaan sistem mekanikal pusher pada mesin positioner untuk mendorong trailing leaf spring agar berada pada koordinat gripping yang telah ditentukan. Penelitian ini bertujuan memperoleh rancangan sistem mekanikal pusher, nilai perhitungan dan spesifikasi komponen pneumatik murni, serta nilai perhitungan dan spesifikasi komponen transmisi mekanis pada mesin positioner trailing leaf spring. Penelitian dimulai dari penentuan konsep desain mekanisme pusher, perhitungan komponen pneumatik, perencanaan desain sirkuit pneumatik murni menggunakan software Festo FluidSIM, perhitungan komponen transmisi mekanis, pemilihan komponen berdasarkan data katalog manufaktur, serta pemodelan tiga dimensi menggunakan software SolidWorks. Hasil penelitian diperoleh spesifikasi komponen pneumatik menggunakan silinder pneumatik double acting dengan diameter bore silinder 50 mm, diameter rod 20 mm, dan stroke 100 mm yang mampu menghasilkan gaya efektif 1060 N lebih besar daripada beban maksimum 206 N. Spesifikasi sistem transmisi mekanis menggunakan ballscrew dengan diameter nominal 32 mm, lead 10 mm, panjang total poros ballscrew 1000 mm, konfigurasi tumpuan fixed-supported yang terdiri atas fixed side support unit menggunakan angular contact ball bearing dengan kapasitas beban dinamis 15,6 kN dan support side support unit menggunakan deep groove ball bearing dengan kapasitas beban dinamis 14,8 kN, menggunakan dua unit linear rail panjang 1150 mm dan empat unit linear block tipe QHW-CA dengan kapasitas beban statis 19,86 kN dan kapasitas beban dinamis 17,94 kN, timing belt-pulley tipe S5M dengan rasio 1:1, timing pulley 36 gigi, panjang keliling belt 830 mm, lebar belt 25 mm. Penggerak menggunakan gear motor listrik dengan daya 400 W putaran maksimum 1400 rpm, rasio reduksi 1:3 sehingga putaran keluaran 465 rpm. Berdasarkan hasil perhitungan, spesifikasi komponen yang dipilih telah memenuhi seluruh persyaratan desain, sehingga hasil perencanaan sistem mekanikal pusher layak diterapkan pada mesin positioner trailing leaf spring.
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PT Indospring Tbk relocated two robotic arms on the Plant 2 heating line to improve the productivity of the trailing leaf spring material handling process. However, the misaligned robot base layout and the asymmetric geometry of the trailing leaf spring may cause the robot gripping point to be offset from the material's center of gravity. This condition may generate an eccentric moment acting on the robot, increase the risk of material slippage during handling, and reduce product quality. To overcome these problems, a mechanical pusher system for a positioner machine was designed to move the trailing leaf spring to the predetermined gripping coordinates. This study aims to develop the mechanical design of the pusher system, determine the specifications of the pure pneumatic system, and determine the specifications of the mechanical power transmission system for the trailing leaf spring positioner machine. The research was carried out through the development of the pusher mechanism design concept, pneumatic system calculations, pure pneumatic circuit design using Festo FluidSIM software, mechanical power transmission calculations, component selection based on manufacturers' technical catalogs, and three-dimensional modeling using SolidWorks software. The results show that the pneumatic system employs a double-acting pneumatic cylinder with a 50 mm bore diameter, a 20 mm rod diameter, and a 100 mm stroke, capable of generating an effective pushing force of 1,060 N, which exceeds the maximum required load of 206 N. The mechanical power transmission system utilizes a ballscrew with a nominal diameter of 32 mm, a lead of 10 mm, and a total shaft length of 1,000 mm, supported by a fixed-supported configuration consisting of a fixed-side support unit equipped with an angular contact ball bearing having a dynamic load rating of 15.6 kN and a support-side support unit equipped with a deep groove ball bearing having a dynamic load rating of 14.8 kN. The linear motion system consists of two 1,150 mm linear rails and four QHW-CA linear blocks with static and dynamic load ratings of 19.86 kN and 17.94 kN, respectively. The transmission system uses an S5M timing belt-pulley with a transmission ratio of 1:1, a 36-tooth timing pulley, an 830 mm pitch length, and a belt width of 25 mm. The driving system employs a 400 W geared electric motor with a maximum speed of 1,400 rpm and a reduction ratio of 1:3, resulting in an output speed of 465 rpm. Based on the design calculations, all selected components satisfy the required design criteria, indicating that the proposed mechanical pusher system is feasible for implementation in the trailing leaf spring positioner machine.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Trailing Leaf Spring, Mesin Positioner, Mekanisme Pusher, Sistem Transmisi Mekanis, Sistem Pneumatik, Material Handling, Trailing Leaf Spring, Positioner Machine, Pusher Mechanism, Mechanical Power Transmission System, Pneumatic System, Material Handling
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design T Technology > TJ Mechanical engineering and machinery > TJ950 Pneumatic machinery
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Ahmad Syahru Ramadhani
Date Deposited:	28 Jul 2026 04:51
Last Modified:	28 Jul 2026 04:51
URI:	http://repository.its.ac.id/id/eprint/138655

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