【正文】 reeform surfaces, J Zhejiang Univ SCIENCE A 2022 7(9):15301534[15] . NahmH. Ishikawa, A new 3DCAD system for setbased parametric design, Int J Adv Manuf Technol (2022) 29: 137150 附錄一：英文文獻(xiàn)Stone cutting automation technology based onfeaturesJulio Garrido Campos, Ricardo Marin Martin, Jose Ignacio Armesto, Juan Saez LopezDepartamento de Ingenieria de Sistemas y Automatica . Ingenieros Industriales. Universidad de Vigo Vigo, SpainKeywords Automation, CAD/CAM/CNC, disc cutting technologies,features.Abstract:This paper proposes a CAD/CAM/CNC architecture to automate saw blade stone cutting machines (disc stone cutting machines). The architecture is designed to give the controller the capacity of decision making as well as control of the machine tool, with the objective of being able to react to changes in the machining conditions,which is mon in this kind technology. Adopting a similar paradigm as the new approaches for CNC manufacturing, especially the new ISO standard for CNC programming (STEPNC), the proposed system is based on the definition of product features to be municated to the controller. The controller has the objective of machining the features, and it is able to replan, on the fly,the work to get them, despite changing conditions in the stone or in the disc.INTRODUCTIONA. Stone cutting technologyThere are several stone cutting technologies and machines as stone cutting by diamond blades [1], abrasive water jet cutting [2], disc cutting or circular saw cutting machines (also know as bridge saw machines) [3], etc. They vary in eficiency and cost, quality of the machined part, and the set of profiles or features they are able to machine. Among them,circular sawing with diamondimpregnated segments mounted on a circular steel core is the most extensevely used process for granites and stone in general [4].Disc cutting machines are a unique technology because of the used tool, a disc. Using discs limits the number of axis which can be moved when they are into the stone (only movements in the cutting plane can be done), although to make plex features as arc patterns (figure 1), even five axis movements may be needed and performed when the disc is out of the stone. Another representative characteristic of this technology is the nonhomogeneous conditions of the cutting process due to, for instance, a sudden lost of disc cutting efficiency, changes in the stone structure, etc. Stone or disc changing conditions cause that, to get an optimized process,the control orland the operator should have the ability of making deep changes in the middle of the process.9781424441952/09/$ (c) 2022 IEEEDisc or circular saw stone cutting machines may be,therefore, very plex, with 5 or more axis (figure 2) to be able to machine those plex parts, both in terms of mechanical architecture and in terms of the control system. In some cases, they are being programmed using the same technology as their metal CNC machines counterparts, the Gamp。M codes [5]. Figure I. Figure I: stone part. Figure 2. 6 axis stone disc cuttin gmachineBut, at the same time, stone disc cutting technology has the same main characteristics as the ones given by C. Zhang, and T. Hu [6] for the future desired CNC scenarios to machine metal parts (and more specifically, for future STEPNC controllers), where the controller program is a range of information such as feature to be machined, tool types used, etc. while the very machinespecific decisions are left to the CNC and its operator.B. New CNC paradigms and standards. Whereas significant changes and advances have been doneduring last decade in CAD/CAM domains, data for puter numerical controllers (CNC) is still being defmed using the ISO 6983 programming interface. This standard is based on a series of G and M codes (basic motion and switch mands for standardized CNC functions and operations)[7]. Although still globally used in metal CNC machines, ISO 6983 has bee a bottleneck because of the information passed to the CNC controller is limited to the how to makeinformation, without information about the actual workpiece and also because the data model nonpliance through the CAD, puteraided process planning (CAPP), CAM and CNC [8]. STEP AP238 [9], informally know as STEPNC, is the STEP (ISO 10303: STandard for the Exchange of Product data models) [10] extension for CNC programming. It defines a richer interface or information model for data transfer between CAD/CAM programming systems and CNCs than ISO 6983 [11]. STEPNC makes available higher information content to the CNC [12] with information describing not only how to make the piece but also about what to make. In STEPNC programs can be described as a set of plex structured tasks (workingsteps) to machine the features of a workpiece13]. This facilitates the development of a new generation of CNCs more capable of performing intelligent functions, and they will take more active role in manufacturing.C. Dynamic feature based disc cutting automation.STEPNC (STEP AP238) extends STEP standard to cover the information requirements needed for NC programming within several machining technologies. There are already some research initiatives in the field of stone machining in STEPNC, but based on milling technology [14], however,stone disc cutting technology has not been taken into account yet. First step to make a real STEPNC stone disc cutting CAD/CAMlCNC system is to get a control architecture sharing the main characteristics about future based control systems as the future STEPNC machines for metal work will have.This paper proposes a CAM/CNC architecture to automate disc stone cutting machines. The architecture is designed to be able to react to changes in the machining conditions, very mon in this technology. Adopting similar paradi