Computer-aided Manufacturing Systems Research Articles

Comparative Evaluation of the Marginal Adaptation of Cast Ni-Cr Copings, Direct Metal Laser Sintering Co-Cr Copings, and Computer-aided Design and Computer-aided Manufacturing Zr Copings: An In-vitro Study.

Background and purposeMarginal adaptation is critical for the long-term longevity and clinical success of dental restorations. Improper marginal adaptation may lead to oral fluids, resulting in microleakage and cement dissolution. The present in vitro study aimed to evaluate the marginal adaptation of nickel-chrome (Ni-Cr) copings, cobalt-chrome (Co-Cr) coping, and zirconium (Zr) copings, produced with different manufacturing procedures.Material and methodsA total of 45 copings were fabricated on a standardized metal die by using a two-stage putty impression and poured with die stone. They were divided into three groups of 15 each: A, B, and C. For group A, Ni-Cr copings were fabricated by conventional casting procedures; for group B, Co-Cr copings by direct metal laser sintering (DMLS); and for group C, zirconium copings by computer-aided design and computer-aided manufacturing (CAD/CAM) systems. Four areas around the tooth surface, namely, the mid-mesial, buccal, distal, and lingual surfaces, were digitally analyzed for marginal adaptation under the scanning electron microscope.ResultsThe mean marginal gap for group A on the mid mesial, buccal, distal, and lingual surfaces was 79.67, 83.27, 90.67, and 89.13 µm, respectively. The mean marginal gap for group B on the mid-mesial, buccal, distal, and lingual surfaces was 38.13, 46.20, 45.73, and 42.20 µm, respectively. The mean marginal gap for group C on the mid mesial, buccal, distal, and lingual surfaces was 36.73, 31.73, 29.00, and 30.53 µm, respectively.ConclusionThe marginal adaptation of CAD/CAM Zr copings is more accurate when compared to the DMLS Co-Cr and Cast Ni-Cr copings on a standard master die.

Influence of various airborne-particle abrasion conditions on bonding between zirconia ceramics and an indirect composite resin material

Statement of problemIndirect composite resins (ICRs) have been suggested as veneering materials for implant-supported zirconia-based fixed dental prostheses; however, obtaining a durable bond between the zirconia ceramic and the ICR is a challenge. PurposeThe purpose of this in vitro study was to evaluate the influence of airborne-particle abrasion conditions on the bond strength between 2 kinds of zirconia (yttria-stabilized tetragonal zirconia polycrystal [Y-TZP] and ceria-stabilized tetragonal zirconia/alumina nanocomposite [Ce-TZP/A]) and an ICR. Material and methodsZirconia disks were prepared by using computer-aided design and computer-aided manufacturing (CAD-CAM) systems. Specimens were airborne-particle abraded with different particle sizes (25, 50, 90, 125 μm) and jet pressures (0.1, 0.2, 0.3, 0.4 MPa). The control group (CO) was not subjected to airborne-particle abrasion. The surface roughness (Ra) of the specimens was measured. Subsequently, the specimens were treated with a primer and bonded with a light-activated composite resin, and the shear bond strength (SBS) was tested. The obtained data were analyzed by using multivariate analysis of variance, the Spearman rank-order correlation, and the Mann-Whitney U test (α=.05). After the SBS test, the interface failure modes were observed by scanning electron microscopy, and X-ray photoelectron spectroscopy (XPS) was used to analyze the chemical changes of the zirconia surface. ResultsThe Ra values increased significantly (P<.05) after airborne-particle abrasion with a positive correlation with both particle size and jet pressure. The airborne-particle abraded specimens exhibited significantly higher bond strength after thermocycling (P<.05) than the CO. Nevertheless, the bond strength was not significantly different among different airborne-particle abrasion treatments (P>.05). Additionally, Y-TZP had higher mean bond strength values than Ce-TZP/A. The XPS results revealed that after airborne-particle abrasion, the alumina particles mechanically adhered to the zirconia surface. ConclusionsWithin the limitations of this in vitro study, airborne-particle abrasion improved the bond strength between zirconia and ICR; however, particle size or jet pressure were not influencing factors.

Trueness of the Inner Surface of Monolithic Crowns Fabricated by Milling of a Fully Sintered (Y, Nb)-TZP Block in Chairside CAD-CAM System for Single-visit Dentistry.

A single-visit zirconia restoration can be easily achieved if direct milling of a fully sintered zirconia block can be performed without much effort. However, no studies have yet been reported regarding the evaluation of the trueness of crown fabricated from chairside-milling of a fully sintered zirconia block in the chairside computer-aided design and computer-aided manufacturing (CAD–CAM) system for single-visit dentistry. This in vitro study aimed to evaluate the trueness of crowns fabricated by milling a fully sintered zirconia block in the chairside CAD–CAM system and investigate the clinical implications for single-visit chairside restoration. Crowns were fabricated either by chairside-milling a fully sintered block of niobium oxide containing yttria-stabilized tetragonal zirconia polycrystals ((Y, Nb)-TZP) without the sintering process (n = 12) in a chairside single-visit dentistry system (Chairside group) or by laboratory-milling a partially sintered 3 mol% block of yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP) followed by the sintering process (n = 12) in a conventional laboratory system (Labside group). Crown fabrication time, milling tool diameter and the trueness of each crown were evaluated. All trueness values of both groups were within the clinically acceptable range, although a significant difference between the Chairside (43.0 ± 3.67 μm) and Labside groups (37.4 ± 2.41 μm) was observed (P < 0.05). Mean fabrication time was 0.52 h and 1.42 h for Chairside and Labside groups, respectively. A decrease in the tool diameter was observed for the Chairside group.

Automation of Obtaining Parts Parameters for Tasks of Design-Technological Parametrization

Introduction. Automation of obtaining design parameters of the part is the most important step in the integration of the design, process planning and manufacturing. The aim of this work is to obtain part parameters, the numerical values of which can be used in parametric calculations. Materials and Methods. The work is the development of the concept of end-to-end design and technological parametrization in Computer-Aided Manufacturing. The theoretical research is based on the formal theory of data representation and processing, the set theory, and the theory of hierarchical multilevel systems. The software implementation was carried out in the Visual Studio C++ environment using KOMPAS-3D application program interface and the C3D geometric kernel application program interface. Results. A method has been developed for obtaining the initial part parameters during the transfer of information from the design engineering Computer-Aided Manufacturing systems to the technological preparation of production. A logical data structure in a relational form was developed, which made it possible to eliminate redundancy and ensure the consistency of the presentation of part parameters, taking into account the priorities of the sources of design information. The software method is implemented as part of the commercial Computer-Aided Manufacturing system for the KOMPAS- 3D platform. Source parameters (metadata, material properties, annotation parameters, parametric variables) are extracted from the 3D-model using application program interface. Integration with the KOMPAS-3D materials directory has been implemented to obtain material properties. Discussion and Conclusion. The obtaining of initial information about the part is the first step in the implementation of the end-to-end design and technological parameterization in the field of Computer-Aided Manufacturing. Due to the design and technological parameterization and associativity of the toolpath, a through technological project can be built when changes made by the designer to the part will be automatically transferred to the technological model and to the control program for the CNC machine. End-to-end parametrization is most efficiently used for parametrized parts that have several dimensional modifications. Further development of the technological parameterization is expected to focus on the tasks of the automatic workpiece selection, cutting tools and devices.

Computer-aided manufacturing and focused ion beam technology enable machining of complex micro- and nano-structures

We present a novel framework for the fabrication of geometrically complex structures at the micro- and nano-scale which relies on the synergy of integrated computer-aided design and manufacturing systems (CAD/CAM) and focused ion beam (FIB) technology in a scanning electron microscope. Here we utilise industry standard G-code syntax, for the first time, to FIB machining by designing geometries with CAD, defining machining strategies and exporting G-codes with CAM and generating a coordinate list-based beam path by using a custom-built interpreter program. This allows the fabrication of complex structures from CAD models using syntax which is readily understood in the general fabrication industry. The use of G-code allows optimization of the beam path towards a reduction of beam blanking operations and tracing of contours, leading to minimized re-deposition of material. We give a detailed description of the method, use an application example to demonstrate advantages and prospects of the approach and provide the free and open-source interpreter program CAM2FIB for application of this method. We contrast and compare various existing available milling strategies and demonstrate the versatility of G-code based programming.

Layer geometry control for the fabrication of lattice structures by wire and arc additive manufacturing

Wire and arc additive manufacturing (WAAM) is an additive manufacturing (AM) technology that uses wire-form materials and arc discharges as the energy source. AM techniques can fabricate complicated shapes that cannot be obtained via conventional processing. Building lattice structures inside components enables weight reduction while maintaining high strength. Strut shapes must be constructed to form these lattice structures using WAAM. For fabricating strut shapes with high accuracy, the process parameters should be optimized. However, the relationship between layer geometry and process parameters is not clear. Therefore, in this study, struts were fabricated under various process conditions to investigate the influences of process parameters on the built object geometry. The results showed that fabrication of strut shapes depends on the heat input condition. Moreover, it was found that the arc discharge time had the highest influence on the layer height and diameter. The inclination angle of an overhanging shape had little influence on the dimensional accuracy of the built object. In addition, computer-aided manufacturing (CAM) system was developed for the fabrication of lattice structures, and the lattice structures were successfully built using WAAM. The build accuracy was measured using an x-ray computed tomography (CT) scanner; the deviation in the structures designed using the CAM system and the actual fabricated structures measured using the CT scanner was lower than approximately ±2.3 mm.

Evaluation of the accuracy and stress distribution of 3-unit implant supported prostheses obtained by different manufacturing methods

The purpose of this in vitro study was to measure the vertical, positive-horizontal, and negative-horizontal misfit (VM, PHM, and NHM, respectively) of the zirconia three-element prosthetic framework, fabricated using different methods, and compare them with conventional fabrication methods (lost-wax casting). Furthermore, this study aimed to evaluate the influence of the misfit values on the biomechanical behavior of the 3-unit fixed prosthetic frameworks using three-dimensional finite element analysis (3D-FEA). Forty frameworks (n = 10) were fabricated as follow: G1, Cerec Bluecam; G2, iTero; G3, 3Series; and G4, conventional method. The samples were randomized to measure marginal misfit using a high-precision three-dimensional (3D)-optical microscope. The results were submitted to analysis of variance (ANOVA), with the significance level set at 5%. The mean VM values of each group were used in creating the models by 3D-FEA with the misfit found in optical microscopy. The programs used were the InVesalius, Rhinoceros, SolidWorks, FEMAP and NEiNastran. The von Mises map was plotted for each model. The G4 showed the lowest mean VM value (16.73 μm), followed by G3 (20.71 μm), G2 (21.01 μm), and G1 (41.77 μm) (p < 0.001). G2 was more accurate than G1 (p < 0.05) and similar to G3 (p = 0.319). For PHM, G4 was the most accurate and did not present overextended values. With regard to NHM, the computer-aided design and computer-aided manufacturing (CAD-CAM) systems were more accurate (−61.91 μm) than G4 (−95.36 μm) (p = 0.014). In biomechanical analysis, stress concentration caused by oblique loading is greater than caused by axial loading. In axial loading, G4 was the most favorable while G1 was the least favorable, biomechanically, in oblique loading, similar stress patterns were observed in all the models. The prosthetic screw was the most overloaded structure, but the material did not influence the stress distribution. The misfit prostheses showed a greater degree of stress than the controls (without misfit). The manufacturing method influenced the marginal misfit of the frameworks, with the conventional method being the most accurate and the Cerec Bluecam System (closed system) the least accurate. Biomechanically, fitting prostheses were more favorable than misfit prostheses.

Micro‐slurry jet for surface processing of dental ceramics

A micro-slurry jet (MSJ) was used for removing microscopic cracks and microstructural defects on surfaces of dental ceramics, in which the MSJ functioned as a wet blasting machine using mixed alumina particles and water to spray workpiece surfaces by a compressed air. Plate specimens made from a composite resin ceramic (CERASMART 270) and a zirconia ceramic (KZR-CAD Zr) were prepared using a dental computer-aided manufacturing system. The results indicate that the MSJ processing has removed the microscopic cracks and defects on surfaces of the composite resin ceramic, and improved the material bending strength. In comparison, the MSJ processing created spraying patterns on zirconia surfaces due to the movement of the MSJ injection nozzle. The bending strength of the MSJ processed zirconia was slightly deteriorated because of the MSJ-induced patterns which might have led to stress concentrations on the ceramic surfaces.

Review of STEP-NC System Controlled by Android Platform Through Wifi

STEP (STandard for the Exchange of Product model data, ISO 10303) data for numerical control (NC), or the new standard STEP-NC (ISO 14649), is intended to provide full product and process data interoperability between computer-aided manufacturing systems and machine tool controllers. Wireless networks have been widely developed compare to wired network, and the wireless communication removes the restriction of wired connections. One of successful wireless networks architecture is WiFi (wireless fidelity) and it is very popular in providing different data services. Integrated WiFi network is a great potential for the future due to the high data transport capacity of WiFi. Google’s Android platform is a widely anticipated open source operating system for mobile phones and the idea to integrate with NC machine through WiFi will be a contribution for manufacturing industries. This research focuses to explore the theories and techniques behind procedure of STEP-NC system controlled by android platform through WiFi. The developed application controller enables the machine tool to be controlled based on wireless communication, android platform and STEP-NC data generated from CAD/CAM systems.

Investigation of the correlation between radial depth of cut (RDOC) and axial depth of cut (ADOC) in NX-CAM system: Simulation Studies

This paper outlines a simulation study to investigate the correlation between radial depth of cut (RDOC) and axial depth of cut (ADOC) in 4 axis machining processes. Computer-aided Manufacturing (CAM) plays a crucial role in simulating cutting operations before the real process executed. Several cutting parameters can be analysed through effective CAM program to predict the outcomes. However, an efficient program required skilled operator to develop the process planning. Besides, a standard CAM system has limited capabilities to handle repetitive simulation due to unavailable function to support the analysis. In this study, the combination of RDOC and ADOC is analyses on different parts features consist of planar surface and non-planar surface. Several set of pairing percentages between RDOC and ADOC are used in the simulation program to analyses the cutting operations. In order to perform the simulation, a customized program was developed in NX CAM system to assist the routines. It capable to generate machining data files from each simulation and assess the total volume removed. A pairing set with high volume removal is denoted as an optimum value and will be chosen as a cutting parameter in finishing operation. Generally, ADOC has a significant effect compared to RDOC in terms of total volume removed from the workpiece.

All-ceramic Computer-aided Design and Computer-aided Manufacturing Restorations: Evolution of Structures and Criteria for Clinical Application

At a time when esthetics is becoming increasingly important in society, the metal-ceramic system, although clinically reliable in the long term, no longer grants satisfaction in terms of mimicry and biocompatibility. Over the last two decades, the growth of computer-aided design and computer-aided manufacturing (CAD/CAM) systems has promoted the development of new all-ceramic materials. However, the abundance and diversity of the suggested materials involved in fixed prosthetic rehabilitation place the practitioner in a situation of conflict regarding the choice of selecting the type of restoration appropriate to the clinical situation presented to him/her. The aim of this article is to classify the different types of milled ceramics according to their microstructure, to review the clinical indications of each, and to indicate whether they should be cemented or bonded. The diverse sorts of milled ceramics using the CAD/CAM procedures are classified into four categories according to their chemical nature. Therefore, the large constitutional and structural variety of the all-ceramic materials will define the esthetic and mechanical properties of each group. The all-ceramic CAD/CAM restorations are witnessing a well-deserved rise, knowing that none of those milled ceramics has a universal clinical application. Given the abundance and diversity of the new machined ceramics materials, it is necessary to familiarize with their properties as well as with their mode of assembling to the dental structures to ensure the success and durability of the restoration.

Digitization in forensic odontology: A paradigm shift in forensic investigations.

Forensic dentistry deals with proper handling, examination, and evaluation of dental records, which are then presented in the interest of law for justice. It plays a major role in identification of deceased individuals who cannot be identified visually or by other means after mass disasters or crimes. Digital forensics has revolutionized the traditional forensic investigations in terms of acquisition, analysis, and reporting of forensic evidence and its application is becoming common in the mass disasters, earthquakes, and terrorism. Sophistication of software and advent of digital technologies such as computers, computer-aided design computer-aided manufacturing systems, digital records, facial reconstruction, touch-free autopsy, and virtopsy has resulted in quick identification and extraction of a large amount of data with reduced sampling bias. This paper focuses on the evolution of forensic dentistry for effective detection and resolution of medico-legal matters and also highlights the use of comparison microscopes and new robotic tools by few forensic laboratories for automation of deoxyribonucleic acid sampling processes for human identification.

Integrated CAD tolerancing model based on difficulty coefficient evaluation and Lagrange multiplier

Tolerance allocation is a very important assignment. In fact, knowing how to allocate efficiently tolerances for assembly parts in a computer-aided design (CAD) and computer-aided manufacturing (CAM) system is a very key issue because the cost and quality depend directly on dimension tolerances. The traditional optimization approaches complain about a lack regarding the evaluation of manufacturing difficulty to solve tolerance allocation problem. In this paper, a new approach based on difficulty coefficient evaluation (DCE) and Lagrange multiplier (LM) method is presented to obtain an economical tolerance allocation. In fact, DCE technique, based on the failure mode, effects and criticality analysis (FMECA) tool, is used to quantify the manufacturing difficulty of mechanical parts, as well as the LM method is developed to optimize the proposed approach while respecting the functions and manufacturing requirements. A case study is established to verify the highlights of this work. Indeed, the computed result shows that the method can produce tolerance allocation economically and accurately according to difficulty requirements. Consequently, the proposed method is performed to exploit fully design for manufacturing and assembly (DFMA). For this, an integrated CAD/tolerancing model based on manufacturing difficulty (ICADTMD) is developed using graphical user interface (GUI) in MATLAB.

Near Time-Optimal &lt;italic&gt;S&lt;/italic&gt;-Curve Velocity Planning for Multiple Line Segments Under Axis Constraints

To drive the machine tool along a curve, a commercial computer-aid design and computer-aided manufacturing system usually breaks the curve into a set of line segments. This paper provides a systematic way for generating smooth and fast machining velocity planning for contouring line segments in a machine tool. It is especially useful for mass manufacturing. In this paper, the particle swarm optimization algorithm is employed to optimize the design parameters. The algorithm allows for as many motion limits as possible, not only the limits along the path, but those on the axes, as well. It can automatically determine the existence of acceleration, constant speed, and deceleration zones of the S -curve velocity profile. Also, it can determine the optimal corner speed with a given corner error. The computation time of the algorithm is fast so that it allows for online operation. Simulation and experimental results demonstrate that machine tools using the proposed algorithm go fast where possible and slow down where needed, dramatically increasing the productivity.

Study of Industrial Robot Numerical Control Program Based on Stationary Tool Control

Six-axis robotic manipulators continue to play a vital role in the development of industrial automation worldwide. Mechanical arms incorporated with computer-aided design and manufacturing systems have gradually received attention in the field of manufacturing. This study adopted the Denavit-Hartenberg notation to construct a kinematic model of the FANUC M-20iA/20M six-axis robot manipulator configuration with stationary point control. Visual C# was employed to develop the transformation interface which converts the tool path files generated from Unigraphics NX software into readable robotic manipulator formats. This study adopted FANUC ROBOGUIDE simulation software for further verification and comparison. The results validate the proposed scheme.

Study of Computerized-Batik Technique Using “Batik Kelowong” Machine in Batik Adelia, Bekasi

Batik Kelowong Machine is an innovation in batik processing that has been invented by Agus Martoyo in 2010 and currently used at Adelia Workshop, Bekasi. Differs from other tools that still relied on artisans’ craftsmanship, this machine worked full-automatically by integrating Computer Aided Manufacturing system and adopting CNC (Computer Numeric System) technology, formerly used in metal and wood engraving, into the process of ‘writing the outline’ or ‘klowongan’ in batik. This research aims to study the linkages between machine’s capabilities with the characters of design elements such as dots, lines, and shapes. Focus of this research is to identify the design element’s characters that were produced by computerized-batik technique, conducted by studying patterns in Adelia Workshop using qualitative-descriptive methods. It is concluded that the digitalization and mechanization in Adelia Batik have not only affects the line of process, but also batik designs. By using vector-based software in design stage, designer can experiment with various techniques digitally, such as repetition and mirroring, thus affecting batik’s design. Using the machine also enhances precision, neatness, and exactness of the patterns. The workshop does not have to rely on pattern and klowongan makers, thus cut off some expenses and time. In other hand, since it can only be used in the making of main outline, not for isenisen (detail of an ornament) or tembokan (blocking the patterns with malam), batik artisans still be needed to complete the projects.

Analysing Computer-Aided Manufacturing Systems and Optimising Work Sequence of Complex Shell Parts

A track record in application of multi-operational CNC machines shows that their using is efficient only in the case of a significant increase in productivity rate and a dramatically reduced time-to-market of new products. Manufacturing capabilities of multi-operational machines (MOM) have been most completely revealed when machining the complex shell parts. The more complicated is a design of the part and the more is the number of its surfaces to be machined and the number of tools desirable for its machining and positioning, the more efficient is the use. One way to improve the MOM machining rate is to reduce nonproductive machine time by decreasing the mutual overlap processing of the movable operating elements of the machine.To solve this problem, the computer-aided manufacturing (CAM) systems have been analysed. The analysis has shown that their capabilities are wide enough, however, these systems can calculate only the total execution time of the main manufacturing steps, but cannot calculate the nonproductive machine time and minimise it. This conclusion suggests that the task of optimizing the processing sequence is relevant. The research has shown that the problem can be solved by dynamic programming methods, one of which is the solution of the traveling salesman problem (the Bellman’s method). With a known processing schedule of all the elementary surfaces of the shell part, i.e. the known number of the manufacturing steps to be performed, each step is represented as a vertex of some graph, and technological links between the vertices of its edges. A mathematical model developed on the Bellman principle, which is adapted to the manufacturing tasks allows us to minimise mutual overlap processing time of the operating elements of the machine to perform all the steps in the optimal sequence. Based on the MOM model (1000VBF), the mathematical model has passed tests when machining the shell part with 26 manufacturing steps to reach up to 12% reduction of the nonproductive machine time, as a result of optimization.

Methodology to optimize dead yarn and tufting time for a high performance CNC by heuristic and genetic approach

Abstract To achieve a high productive manufacturing ability and reduce dead yarn accumulation, a novel computer numerical control (CNC) machine and an efficient methodology was proposed to generate optimal or near optimal sequences of tool paths for minimizing manufacturing time. Two methods are available to generate complicated and customized photo-based carpets: to fit pre-drawn curves on a fabric backing by using a portable tufting gun and to generate available tool paths from a computer-aided manufacturing (CAM) system for a robotic tufting gun. These two operations are not suitable for high-speed applications. The solution proposed in this study starts from the original needle location paths provided by computer graphic software to solve a traversing tuft problem (TTP). The obstacle of the innovative manufacturing process, in reducing the time of the travel path for the tufting of the CNC machine, was solved. The methodology can be easily implemented using a CAM system. Several industrial experiments were proposed, which demonstrate substantial improvements of the proposed algorithm over solutions provided by application software. Moreover, for optimizing the usage of yarn in a spindle traverse movement, we present a high-performance implementation a heuristic genetic algorithm (GA) that allows achieving the optimization task efficiently. A graphical user interface that integrates the entire process was presented.

A clinical evaluation of retention of maxillary complete CAD/CAM and conventional dentures

Background: Computer-aided design (CAD)/computer-aided manufacturing (CAM) denturesare suppose to have more favorable material properties than conventional heat - cured acrylicdentures, among them a lesser methacrylate monomer release.The purpose of this clinical study: Was to evaluate the retention quality of conventional heatcureacrylic denture bases and digitally milled maxillary complete denture bases.Material and methods: This study was done on six edentulous patients; CAD/CAM dentureswere constructed from six different master casts by using CAD/ CAM system. Conventional heatcureacrylic dentures acted as a control group. Universal testing machine was used to measure theretention of the denture. Every denture base was subjected to a slowly increasing vertical load untilthe denture was totally out of place 5 times at 10-minute intervals. The average retention of the twoassemble methods was analyzed using Independent t-test & Paired t-test.Results: CAD/CAM denture showed statistically significant higher mean retention value thanconventional denture at insertion and after one-month (P value<0.000, <0.000) respectively.Conclusion : Compared with the traditional manual method, the retention of the maxillarycomplete denture prepared using the CAD/CAM method for the edentulous alveolar ridge wassignificantly higher, meaning that the CAD/CAM method can meet the clinically acceptableprecision for design and development of complete dentures as trial for restoring edentulous jaws.

Acceleration smoothing algorithm for global motion in high-speed machining

When machining a series of short linear segments, the computer numerical control system interpolates the machining path with the pre-specified spline curve to obtain continuous feed motion. However, to obtain adequate smooth tool-paths to smooth the feed velocity and acceleration, the computer-aided manufacturing system needs to use a higher order spline curve, which will be limited by some technical bottlenecks. In this article, a new real-time interpolation algorithm is proposed from the perspective of kinematics to achieve uninterrupted feed motion throughout the global tool-path. At the same time, the acceleration profile achieves G2 continuous to avoid unnecessary feed frustration and inertial impact, reaching the balance between time-optimal and motion performance. First, the jounce-limited acceleration curve is blended at the corner of the machining path, and the optimal cornering transition velocity is obtained by adding the velocity, acceleration and contour error constraints to the corner transition motion. Then, according to the linear segments with different lengths between the corners, combined with the feed motion around the corner, a look-ahead interpolation algorithm is proposed to calculate the maximum feed rate with the constraint of the linear segment length and kinematic boundary conditions. At last, for the linear segments whose corner contours overlap with each other after interpolation, the smooth transition between the two corners can be realized by mixing the feed motion of the next corner. Compared with non-uniform rational B-spline interpolation algorithm, the proposed algorithm reduces the total machining time by 14% and the computer numerical control system improves the computational efficiency by 11%. It proves that the proposed algorithm has better application value in the manufacturing of complex parts.