Flexible Fixtures for CNC Machining Centers in Multiproduct Manufacturing

Abstract

In modern manufacturing engineering, a major challenge is the contradiction between the need to reduce the time required to design and manufacture the products and the increasing complexity of product design. Today's market requires more varieties of products, and consequently the equipment and processes should be more flexible. Fixtures play an essential role in production of high-quality and competitive products in multiproduct manufacturing. The paper describes the ways of increasing of machining efficiency of parts. The principally new constructions of functional modules of modular adjustable fixtures for locating and clamping of workpieces are introduced. Use of the proposed fixtures with the possibility of automatized adjustment ensures the spreading of technological capabilities of CNC metal-cutting equipment, decreasing of preparatory time and setup time, and therefore, assists improving of the efficiency of production planning.

Reducing Cycle Time in the Manufacturing Process of Circular Pattern Interpolar Products (CPIP) Using Special Fixtures on a 3-Axis CNC Machine

“…The results of this study align with the research conducted by [8], titled "Fixture Design to Reduce Production Costs for KCJR and KCJL Levers," where the fixture design reduced CT by 58% in a 3-axis CNC drilling process [8]. Additionally, this study is consistent with the research conducted by [3] on "Flexible Fixture for CNC Machining Centers in Multiproduct Manufacturing." Their findings confirmed that machining processes involving drilling and milling for various workpieces, including prismatic and rotational parts, could be efficiently executed with fixtures [3].…”

“…In the design process, several considerations are taken into account, such as the intended fixture environment, including operational processes, workpieces, cutting tools, machinery, and operators. Environmental factors constitute external aspects that influence the structure, assembly, and rigidity of the fixture [3]. These external factors can be observed in Table 1.…”

“…220, Makassar, 90152,Sulawesi Selatan *,b massriyady.massaguni@atim.ac.id Corresponding Author), a mluthfi.sonjaya@atim.ac.id c noeroelhaq@atim.ac.id accuracy, and made from specific materials suitable for the machining process [2]. The creation of fixtures must consider several aspects, including Design (structure, assembly, rigidity), Technology (accuracy, flexibility, productivity, quality), Operational (safety, maintenance, usability), and Economic (main costs, efficiency) [3].…”

“…Various fixture technologies for CNC machines have been developed in the past, some intended for multiproduct manufacturing. For instance, a new construction of modular fixtures introduced by [3] allows for adjustable positioning and clamping of workpieces, enhancing efficiency. These fixtures reduce setup and preparation time, improving production planning efficiency for prismatic and quadrant workpieces.…”

Justification for the Choice of the Locating Charts of the Workpieces in the Fixtures During Machining on Multipurpose Machining Centers of the Drilling-Milling-Boring Group

“…Розглянуті вище схеми, у своїй більшості, є традиційними та відомими, проте на свердлильнофрезерно-розточувальних верстатах обробляються також заготовки деталей складної форми (важелі, кронштейни, шатуни, вилки), деталей з криволінійними поверхнями. Для цих та подібних деталей традиційні схеми базування не підходять, тому необхідно індивідуально підходити до проектування ВП, забезпечуючи відповідність основним вимогам [9]- [19].…”