Design of Portable Hot Dimpling Machine for Aerostructure Contoured Part by Modifying Squeezer Chicago Pneumatic CP214

Mutamasitoh, Harisya Prayekti Dewi (2023) Design of Portable Hot Dimpling Machine for Aerostructure Contoured Part by Modifying Squeezer Chicago Pneumatic CP214. Skripsi(S1) thesis, Fakultas Teknik Unpas.

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Abstract

The development of a portable hot dimpling machine is essential for meeting the production requirements of PTDI, particularly for the N-bell 412 Helicopter Program, which requires dimpled sheet metal parts with smaller flange sizes. The existing stationary hot dimpling machine (CP450) cannot process parts with flange sizes smaller than 20 mm, while the new parts require a flange size of 15 mm. This research focuses on modifying the pneumatic Squeezer CP-214 into a portable hot dimpling machine to meet these requirements, in compliance with Bell Specification BPS 4135. The design process includes identifying shop floor needs, establishing target specifications, generating and selecting product concepts, testing prototypes, setting final specifications, and planning for downstream development. The modification involves adding components such as a heating installation, timer, and pressure gauge. The power consumption of the heater needed to dimple parts at a temperature of 315°C is calculated to be 401.2 watts. Qualification tests on specimens made from 2024 T3 and 7075 T6—such as visual inspection, break tests, pry tests, and penetrant tests—show no cracks, scratches, or ruptures, and confirm that the dimpled parts meet the required standards. The results indicate that the modified portable hot dimpling machine is effective and suitable for implementation on the shop floor, offering a practical solution to PTDI’s production challenges while adhering to the specifications outlined in BPS 4135. Keywords: pneumatic squeezer CP-214, flange size, hot dimpling process, Bell specification BPS 4135, aerospace manufacturing

Item Type: Thesis (Skripsi(S1))
Subjects: S1-Skripsi
Divisions: Fakultas Teknik > Teknik Mesin 2023
Depositing User: Irwan Kustiawan Kosasih
Date Deposited: 13 Aug 2025 03:31
Last Modified: 13 Aug 2025 03:31
URI: http://repository.unpas.ac.id/id/eprint/77699

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