Machine repair technology

The tutorial discusses the technological processes of remontamashin, contains elements of the design of technological processes for the restoration of parts and assembly units, describes ways to restore the main defects of machine parts. Meets the requirements of the federal state educational standards of higher education of the latest generation. It is intended for students in the direction of training 35.03.06 "Agroengineering".

PELATIHAN PERAWATAN MESIN JAHIT DALAM RANGKA RE-EKSISTENSI KELOMPOK SWADAYA MASYARAKAT (KSM) SEPAKAT DALAM PENGOLAHAN SAMPAH DI KELURAHAN PASAR UJUNG KABUPATEN KEPAHIANG

The Non-Governmental Organization (KSM) Sepakat is a form of community participation in waste processing. This KSM is located in Pasar Ujung Subdistrict, Kepahiang Regency, Bengkulu Province. KSM Sepakat was established in 2010 and from 2017 has stoped and vacuum from all activitiy to now. One of the factors that causes this vacuum is the damage to production equipment, including components in sewing machines. In addition, the lack of assistance and guidance from the local government has caused the motivation of the members to decrease so that production has decreased too. One of the efforts to re-exist and to reproduce again is sewing machine repair training to all KSM members. This training aims to ensure that each member has basic skills in repairing sewing machines so that if a damage occurs, it will not interfere with the production of waste processing. The method used in this training is through lectures, demonstrations, discussion and direct practice. From the results of the questionnaire, it can be seen that the participants can understand the material well and the material provided is in accordance with the problems in the field. Apart from that, from the questionnaire, it can be seen that the training participants are again committed to activating the activities at KSM Sepakat

Optimal Contract for Machine Repair and Maintenance

Maintenance outsourcing is quite common in industries that rely on complex and critical equipment. Instead of investing in the maintenance facilities, firms outsource maintenance activities to specialized companies. However, it may be hard for firms (i.e., principal) to observe whether maintenance companies (i.e., agent) put sufficient resources into providing the best service, which gives rise to agency issues. In a dynamic environment in which an agent is responsible for both maintenance and repair of a critical machine, how the principal uses payments and termination to tackle agency issues is a challenging problem. In “Optimal Contract for Machine Repair and Maintenance,” F. Tian, P. Sun, and I. Duenyas provide theoretical guidance on designing the optimal contract to induce efforts from an agent to efficiently operate a machine. Although they consider the very general contract forms, the optimal contracts demonstrate simple and intuitive structures, making them easy to describe and implement in practice.

The efficiency of electromechanical upsetting of keyways on shafts during machine repair

The analysis of the effectiveness of modern technologies for obtaining key — keyway of the shaft during the repair of machines is carried out. The results of research on the technology of obtaining such mates by means of electromechanical upsetting of keyway slots on shafts are presented. Recommendations are proposed for improving the efficiency and reliability of the key — keyway of the shaft, modified by electromechanical processing.

Optimal Profit Analysis of Machine Repair Problem with Repair in Phases and Organizational Delay

In this article, we study machine repair problems (MRP) consisting of the finite number of operating machines with the provisioning of the finite number of warm standby machines under the care of a single unreliable server. For the machining system’s uninterrupted functioning, an operating machine is immediately replaced with the available warm standby machine in negligible switchover time whenever it fails. The concept of threshold vacation policy: N-policy is also considered. Under this vacation policy, the server starts to serve the failed machines on the accumulation of a pre-specified number of failed machines in the system. The server continues until the system is empty from the failed machines; after that, the server goes for vacation. The notion of an organizational delay, server breakdown, and repair in multiple phases is also conceptualized to build the studied model more realistic. The recursive matrix method is used to find steady-state queue size distribution, and subsequently, various system performance measures are also developed to validate the studied model. The optimal analysis has been performed to identify the critical design parameters for the governing model. The state-of-the-art of the present study is its mathematical modeling of the multi-machine stochastic problem with varied limitations and strategies. The methodology to obtain queue size distribution, optimal design parameters, is beneficial for dealing with other complex and sophisticated real-time machining problems in the service system, computer and communication system, manufacturing and production system, etc. The present problem is limited to fewer machines, which can be extended to more machines with different topologies with high computational facilities.