Application of CNC Programming Technology in the during of Processing for the Key Parts of Disappearing Mould

2012 ◽  
Vol 249-250 ◽  
pp. 1195-1200
Author(s):  
Xian Zhang Feng ◽  
Li Ping Wang ◽  
Li Hong Yu ◽  
Zhi Qiang Jiang ◽  
Liang Ji Chen ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Dimensional Accuracy ◽  
Complex Surface ◽  
Machining Process ◽  
Taper Angle ◽  
Design And Manufacturing ◽  
Cad Cam ◽  
Cnc Programming ◽  
Expendable Pattern ◽  
Mould Casting

Disappearing mould casting is a new accurately processes with nearly free margin and precision forming, in which is no modulus, no parting, no sand core, so the casting without splash, burr and taper angle. It can improve the dimensional accuracy of the core portfolio for complex surface of the key compose of the disappearing mould. It has completed the design and manufacturing of these by the three-dimensional CAD/CAM technology, and obtains a series of effective methods and experience for the development of the products. The researched results have important directive to production practices for the design and machining process for the expendable pattern casting.

LFC Mold Development of Complex Parts with Free-Form Surface

2011 ◽  
Vol 228-229 ◽  
pp. 532-536
Author(s):  
Xiao Feng Xiao ◽  
Qiong Xue ◽  
Ke Feng Xiao ◽  
Xiao Lan Hu
Keyword(s):  
Three Dimensional ◽  
Free Form ◽  
Pattern Design ◽  
Three Dimensional Modeling ◽  
Key Points ◽  
Cad Cam ◽  
Cnc Programming ◽  
Free Form Surface ◽  
Key Techniques ◽  
Lost Foam

This paper has analyzed key techniques in foam mold development for Lost Foam Casting for different types of casting, which are complex box, pipe faucet junction ,wear-resisting and refractory alloy steel casting, Focused on complex castings with free-form surface, key points during whole technical route, which includes three-dimensional modeling, foamed pattern design, mold design and CNC program, have been discussed by utilizing modeling & manufacturing module on Unigraphics. Because of its perfect free-form surface functions and plentiful toolpath operations in CNC programming, Foam mold of complex casting with free-form surface has been designed, manufactured and assembled successfully for LFC, Qualified foamed pattern of vortical shell has been produced successfully. Several effective methods and experiences have been achieved by utilizing CAD/CAM technology.

scholarly journals CNC Machining Of The Complex Copper Electrodes

2015 ◽  
Vol 66 (1) ◽  
pp. 153-158 ◽  
Author(s):  
Ioan Alexandru Popan ◽  
Nicolae Balc ◽  
Alina Popan
Keyword(s):  
Dimensional Accuracy ◽  
Cnc Machining ◽  
Machining Process ◽  
Optimal Process ◽  
Copper Electrodes ◽  
Good Surface ◽  
Complex Shapes ◽  
Cad Cam ◽  
Complex Copper ◽  
Cam Software

Abstract This paper presents the machining process of the complex copper electrodes. Machining of the complex shapes in copper is difficult because this material is soft and sticky. This research presents the main steps for processing those copper electrodes at a high dimensional accuracy and a good surface quality. Special tooling solutions are required for this machining process and optimal process parameters have been found for the accurate CNC equipment, using smart CAD/CAM software.

scholarly journals The accuracy of computer-aided design and manufacturing surgical-guide for infrazygomatic crest miniscrew placement

2021 ◽  
Vol 11 ◽  
pp. 48-55
Author(s):  
Prajak Jariyapongpaiboon ◽  
Jirawan Chartpitak ◽  
Jaturong Jitsaard
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Surgical Guide ◽  
Surgical Guides ◽  
Computer Aided ◽  
Design And Manufacturing ◽  
Cad Cam ◽  
The Right ◽  
Aided Design ◽  
3D Software

Objectives: Infrazygomatic crest (IZC) surgical guides have been employed to prevent any avoidable complications during miniscrew insertion. The purpose of this study was to evaluate the accuracy of IZC miniscrew placement when using a surgical-guide developed by computer-aided design and manufacturing (CAD/CAM) techniques. Materials and Methods: Ten patients were scanned with cone-beam computed tomography for three-dimensional (3D) planning of IZC miniscrew placements. The upper arches were scanned separately, and virtual miniscrews were placed in the position planned by 3D software. The CAD/CAM surgical guides were designed and fabricated individually to enable accurate miniscrew placement. Subsequently, 20 self-drilling miniscrews were inserted at the right and left IZC areas using 5 CAD/CAM surgical guides (CS group, n = 10) and direct insertion (DI group, n = 10), respectively. Pre- and post-operative digital model images were compared, actual and planned miniscrew positions were superimposed and measured for 3D angular and distance deviations in the two groups. Comparisons between groups were made using the Kruskal–Wallis test. Results: In the CS group, the median coronal and sagittal angular deviations were 2.95 degrees (range 0.34–5.26 degrees) and 2.05 degrees (range 0.38–4.08 degrees), respectively, while the median coronal and apical deviations were 0.39 mm (range 0.24–0.51 mm) and 0.50 mm (range 0.16–0.66 mm). These deviations differed significantly from those of the DI group. Conclusion: The IZC CAD/CAM surgical guide has made it possible to control miniscrew placement with high precision.

scholarly journals Effect of multiple pouring on the accuracy of casts made using 3D-printed custom trays with different spacer thicknesses: A research study

2020 ◽  
Vol 14 (1) ◽  
pp. 37-40
Author(s):  
Sara Tavakolizadeh ◽  
Mohammad Javad Razaghi ◽  
Pedram Pakravan ◽  
Majid Sedaghat Monfared ◽  
Elaheh Beyabanaki ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Dimensional Accuracy ◽  
Significance Level ◽  
Type Iv ◽  
Incisal Edge ◽  
Significant Difference ◽  
Cad Cam ◽  
3D Printed ◽  
Bonferroni Test ◽  
Spacer Thickness

Background . This study aimed to evaluate the effect of different pouring times and spacer thicknesses on the three-dimensional accuracy of casts made of 3D-printed custom trays. Methods. A partial edentulous maxillary model was scanned for fabricating custom acrylic trays. Twenty custom trays were created using a CAD/CAM system and divided into two groups in terms of their spacer thicknesses (2 mm and 4 mm). All the trays were designed with 2-mm thickness, multiple retentive holes measuring 2 mm in diameter, and three interior seating stops (two on the edentulous ridge and one on the incisal edge of the central incisors). Impressions were made using monophasic polyvinyl siloxane and poured in two different times (one hour and 24 hours after removal) with type IV dental stone. All the casts were scanned to measure three distances (inter-buccal cusps, inter-palatal cusps, and inter-fossa distances) between the two first premolars. The data were analyzed with two-way ANOVA and Bonferroni test at a significance level of 0.05. Results. There was no significant difference between the 3D accuracy of casts made using two different spacer thicknesses poured at 1-hour and 24-hour intervals. However, there was a difference between casts made after 1 hour and 24 hours when using custom trays with 2 mm of spacer thickness in terms of inter-buccal distance. Conclusion. There was no significant difference between the accuracy of casts made using custom trays with either 2 or 4 mm of spacer thickness, which were poured 1 hour or 24 hours after tray removal.

scholarly journals Indications for Computer-Aided Design and Manufacturing in Congenital Craniofacial Reconstruction

2016 ◽  
Vol 9 (3) ◽  
pp. 235-241 ◽  
Author(s):  
Mark Fisher ◽  
Miguel Medina ◽  
Branko Bojovic ◽  
Edward Ahn ◽  
Amir H. Dorafshar
Keyword(s):  
Computer Aided Design ◽  
Preoperative Planning ◽  
Three Dimensional ◽  
Senior Author ◽  
Craniofacial Anomalies ◽  
Craniofacial Reconstruction ◽  
Computer Aided ◽  
Design And Manufacturing ◽  
Cad Cam ◽  
Aided Design

The complex three-dimensional relationships in congenital craniofacial reconstruction uniquely lend themselves to the ability to accurately plan and model the result provided by computer-aided design and manufacturing (CAD/CAM). The goal of this study was to illustrate indications where CAD/CAM would be helpful in the treatment of congenital craniofacial anomalies reconstruction and to discuss the application of this technology and its outcomes. A retrospective review was performed of all congenital craniofacial cases performed by the senior author between 2010 and 2014. Cases where CAD/CAM was used were identified, and illustrative cases to demonstrate the benefits of CAD/CAM were selected. Preoperative appearance, computerized plan, intraoperative course, and final outcome were analyzed. Preoperative planning enabled efficient execution of the operative plan with predictable results. Risk factors which made these patients good candidates for CAD/CAM were identified and compiled. Several indications, including multisuture and revisional craniosynostosis, facial bipartition, four-wall box osteotomy, reduction cranioplasty, and distraction osteogenesis could benefit most from this technology. We illustrate the use of CAD/CAM for these applications and describe the decision-making process both before and during surgery. We explore why we believe that CAD/CAM is indicated in these scenarios as well as the disadvantages and risks.

Research and Application of CAD/CAM Technology in NC Machining of Part with Complex Surface

2014 ◽  
Vol 602-605 ◽  
pp. 111-116
Author(s):  
Jin Gui Wan ◽  
Wei Ding
Keyword(s):  
Computer Software ◽  
Complex Surface ◽  
Nc Machining ◽  
Machining Parameters ◽  
Cnc Milling ◽  
Cnc Machine ◽  
Seamless Connectivity ◽  
Cad Cam ◽  
Cnc Programming ◽  
The Cost

The development of modern advanced manufacturing technology greatly relies on the CAD / CAM technology. Many pieces of computer software with CAD/CAM function have been developed rapidly in recent years. Unigraphics (UG) is one of the outstanding representatives. It has a powerful design and CNC programming function, and CAD/CAM seamless connectivity. As an application example, a mouse model part which has complex surface was designed and trial-manufactured with CNC machine. First, the 3D model of the part was created in the modeling module of UG software. Then, the process scheme was developed after analyzing. In the manufacturing module of UG software, the NC machining parameters were set according to the processing requirements, the tool paths were generated, edited and checked, and the NC codes were generated by post processing. And then, the NC machining was simulated in YULONG software. Finally, the part was manufactured in a 3-axis CNC milling machine. It has desirable shape and high accuracy. The results show that UG has a perfect CAD/CAM function. The CAD/CAM technology based on UG makes the NC machining of complex surface part very convenient. It improves the efficiency of design and machining, shortens the manufacturing cycle, and reduces the cost, which reflects the importance of the CAD/CAM software in NC machining. The method described in this paper can provide valuable reference for processing similar parts, and it is also useful for related study.

Study on Numerical Control Machining Technology of Toy Car Cover

2012 ◽  
Vol 150 ◽  
pp. 235-239
Author(s):  
Jin Gui Wan ◽  
Xi Ping Wang ◽  
Wei Ding ◽  
Wei Li
Keyword(s):  
Code Generation ◽  
Tool Path ◽  
Integrated Design ◽  
Cnc Machining ◽  
Numerical Control ◽  
Machining Process ◽  
Three Dimension ◽  
Cnc Milling ◽  
Design And Manufacturing ◽  
Cad Cam

Based on UG II CAD/CAM system, the CNC machining process and technology of a toy car cover is studied in this paper. It includes three-dimension (3D) modeling, machining programming, fixture design and manufacturing, process parameter setting, tool path planning and editing, NC code generation (post processing), simulation processing, and practical machining. The part is manufactured successfully in a 3-axis CNC milling machine. It has a desirable shape and high accuracy. The result shows that, with the powerful CAD/CAM capabilities of UG, the integrated design and manufacturing of complex curved surface shell part is easy to implement, the process is reasonable and efficient, and the NC program is reliable. This exmple fully reflects the advantages of UG CAD/CAM integration technology. The method and technology introduced in this paper can provide valuable reference for processing of similar parts.

Design and Manufacturing of Complex Surface Impeller Based on RE

2011 ◽  
Vol 328-330 ◽  
pp. 619-623
Author(s):  
Zhi Yang Li ◽  
Ming Yu Huang ◽  
Hong Ju Hu ◽  
Hong Jun Ni ◽  
Yu Zhu ◽  
...  
Keyword(s):  
Reverse Engineering ◽  
Three Dimensional ◽  
Complex Surface ◽  
Fixture Design ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Basic Principles ◽  
Nc Simulation ◽  
Design And Manufacturing ◽  
Manufacturing Problems

Based on the instance of collection the data of complex surface impeller and reconstruction the three-dimensional model, it describes the concepts and basic principles of Reverse Engineering, and discusses the entire process in detail, which are from the data of impeller collected, the impeller three-dimensional model re-Construction, fixture design to NC simulation machining. Solved the design and manufacturing problems of complex surface parts, which can not be solved by the conventional methods.

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