Design and Implementation of a Pusher Loader Jig on a Hook Forming Machine with the Addition of a Compression Spring System

Abstract

The forming process is one of the common material forming methods used in the manufacturing industry to make products with certain shapes precisely. In the hook forming machine at PT VMC, damage often occurs to the jig pusher loader machine components. The jig pusher loader has a dual role, namely as an active component that transmits the thrust force and at the same time as a component that receives the backlash force. Under certain conditions, the compressive force received by the jig can be very large, this causes the potential for cracks, breaks, and deformation. This study aims to design and implement a modification concept of the jig pusher loader by adding a spring element (compression spring) as a damper for the compressive force received by the jig. The research method used is experimental engineering and mechanical design because the problems faced are technical in nature, so they require design-based solutions and direct testing in the field. The test results showed that the frequency of damage in the new system decreased from 1 time per month to 0 cases during 1 month of observation. The service life of the jig increased from ±1 month to more than 2 months without damage. The jig dimension of the new system only experienced wear of 0.91 mm, compared to 3 mm in the old system. In addition, the new jig showed better stability because it did not experience shifting, impact sounds, or vibrations during machine operation. With the implementation of the new jig, it is expected to reduce the risk of damage, extend the service life, and increase the work efficiency of the machine.