Präzision für Fahrradträume

VDI-Z ◽  
2021 ◽  
Vol 163 (01-02) ◽  
pp. 17-19
Author(s):  
Udo Hipp
Keyword(s):  
Nc Code

Der Lohnfertiger Bernd Iwanow folgt stets seinem Bauchgefühl. Ist er von seiner Idee überzeugt, überträgt er sie in einen NC-Code, den seine beiden Hermle-Bearbeitungszentren präzise in die aufgespannten Aluminiumblöcke fräsen. Ergebnis ist das „Fracebike“.

Integration of Commercial CAD/CAM System With Custom CAPP Using Orbix Middleware and CORBA Standard

2002 ◽  
Author(s):  
Fernando Rangel ◽  
Jami J. Shah
Keyword(s):  
Computer Aided Design ◽  
Numerical Control ◽  
Commercial Application ◽  
Commercial Software ◽  
Computer Aided Process Planning ◽  
Nc Code ◽  
Cad System ◽  
Computer Aided ◽  
Continuous Application ◽  
Part Model

This paper discusses the issues of integrating the Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) programs in commercial software. Integration was achieved through implementation of a computer-aided process planning (CAPP) system within the commercial software. The part model was imported into, or designed in, the commercial CAD system. Manufacturing information was then extracted from the part model by the CAPP system using commercial Application Programming Interfacing (API) methods. The CAPP system then uses the extracted information to produce a process plan consistent with the requirements of the commercial CAM module to produce Numerical Control (NC) code. The internal integration was accomplished using commercial API methods that dynamically bind the CAD, CAPP, and CAM into a single continuous application. These APIs are implemented using the Orbix middleware following the CORBA standard. A case study demonstrating the integration is presented. Strengths and weaknesses of integrating the CAD and CAM domains using APIs and middleware are discussed.

Flank Correction for Spiral Bevel and Hypoid Gears on a Six-Axis CNC Hypoid Generator

2007 ◽  
Author(s):  
Yi-Pei Shih ◽  
Zhang-Hua Fong
Keyword(s):  
Correction Method ◽  
Numerical Control ◽  
Cnc Machine ◽  
Hypoid Gears ◽  
Nc Code ◽  
Machine Errors ◽  
Highly Sensitive ◽  
Spiral Bevel ◽  
Tooth Flank ◽  
Cutter Head

Because the contact bearings of spiral bevel and hypoid gears are highly sensitive to tooth flank geometry, it is desirable to reduce the flank deviations caused by machine errors and heat treatment deformation. Several methods already proposed for flank correction are based on the cutter parameters, machine settings, and kinematical flank motion parameters of a cradle-type universal generator, which are modulated according to the measured flank topographic deviations. However, because of the recently developed six-axis Cartesian-type computer numerical control (CNC) hypoid generator, both face-milling and face-hobbing cutting methods can be implemented on the same machine using a corresponding cutter head and NC code. Nevertheless, the machine settings and flank corrections of most commercial Cartesian-type machines are still translated from the virtual cradle-type universal hypoid generator. In contrast, this paper proposes a flank-correction methodology derived directly from the six-axis Cartesian-type CNC hypoid generator in which high-order correction is easily achieved through direct control of the CNC axis motion. The validity of this flank correction method is demonstrated using a numerical example of Oerlikon Spirac face-hobbing hypoid gears made by the proposed Cartesian-type CNC machine.

A Universal Postprocessor of General Table-Tilting Type of Five-Axis Machine Tools Without Rotational Tool Center Point Function for Actual NC Code Generation

2018 ◽  
Author(s):  
Guoqiang Fu ◽  
Hongli Gao ◽  
Tengda Gu
Keyword(s):  
Code Generation ◽  
Machine Tools ◽  
Kinematic Chain ◽  
Rotary Axes ◽  
Nc Code ◽  
Rotation Axes ◽  
Cutting Test ◽  
Center Point ◽  
Rtcp Function ◽  
Five Axis

The postprocessor is essential for machining with five-axis machine tools. This paper develops one universal postprocessor for table-tilting type of five-axis machine tools without rotational tool center point (RTCP) function. Firstly, positions of two rotary axes and the workpiece in the machine coordinate system (MCS) are introduced into the kinematic chain of the five-axis machine tools. The uniform product of exponential (POE) formula of the tool relative to the workpiece is established to obtain the universal forward kinematics. On this basis, the postprocessor of table-tilting type of five-axis machine tools is developed. The calculation of rotation angles of rotation axes is proposed in details, including the calculation of double solutions, the determination of rotation angles of C-axis and the selection principle of the shortest path of rotation angles. Movements of linear axes are calculated with rotation angles of rotary axes. The generated movements of all axes are actual positions of all axes relative to their zero positions, which can be used for machining directly. The postprocessor does not rely on RTCP function with positions of rotary axes and the workpiece in MCS. Finally, cutting test in VERICUT and real cutting experiments on SmartCNC500_DRTD five-axis machine tool are carried out to verify the effectiveness of the proposed postprocessor.

Research on Virtual Grinding for Indexable Inserts

2014 ◽  
Vol 703 ◽  
pp. 163-166
Author(s):  
Yuan Yuan Wang ◽  
Jun Zhao ◽  
Fei Li
Keyword(s):  
Virtual Environment ◽  
High Speed ◽  
3D Models ◽  
Cutting Edge ◽  
Cnc Machining ◽  
Boolean Operation ◽  
Nc Code ◽  
Virtual Machining ◽  
High Speed Grinding ◽  
Testing Efficiency

The cutting location of cutting-edge curves is obtained by the mathematic models of indexable inserts, and based on the softwares of UG and NCSIMUL, The virtual machining platform is realized to simulate the whole processing of grinding. The Entity modelings of indexable inserts are obtained by Boolean operation in virtual environment, and the basis is presented for analyzing accuracy of the mathematic models and the virtual machining platform. Testing efficiency of NC code and reliability of high speed grinding are improved. This method provides precise 3D models which can be used in the followed works such as finite analysis, CNC machining and so on.

An Open Architecture Framework for the Integration of Virtual Prototyping Software Tools

1997 ◽  
Author(s):  
Uma Jayaram ◽  
Sankar Jayaram ◽  
Donald Tilton ◽  
Kevin Seaney
Keyword(s):  
Virtual Prototyping ◽  
Integrated Design ◽  
Open Architecture ◽  
Design Solution ◽  
Software Systems ◽  
Levels Of Abstraction ◽  
Code Generator ◽  
Nc Code ◽  
Systems Research ◽  
Architecture Framework

Abstract The use of virtual prototyping tools typically results in products with lower costs, better quality, and shorter development cycles. However, there are many interface/configuration problems that occur in the process of obtaining a design solution using the typical gamut of virtual prototyping tools. This paper presents the architecture, design, and implementation of a framework to support the integration of the multiple software systems used in the virtual prototyping of mechanical components. Some of the virtual prototyping software systems considered in the implementation of this framework were customer input systems, solid modeling systems, finite-element systems, knowledge-based systems, NC code generator systems, and virtual assembly systems. There is a pressing need for the different software systems to talk to each other while transferring the required data at varying levels of abstraction without compromising data integrity. Of special significance is the fact that the philosophy of the framework is widely applicable to any mechanical system, and is almost independent of specific software utilities. Thus, this design incorporates a clear path towards expansion to encompass other independent tools/systems. The architecture was designed using object-oriented methods. The framework was very successfully demonstrated for a well-defined subset of software systems being used at Isothermal Systems Research (ISR) Inc., a leader in proprietary spray cooling systems for multi-chip modules. This framework effectively supports the strong industry push towards integrated design, manufacturing, and virtual prototyping. The work presented in this paper was supported by an SBIR grant from the Department of Commerce, DOC contract 50-DKNB-5-00117.

Parametric Programming of Multi-Type Holes Using the Improved Genetic Algorithm

2018 ◽  
Vol 764 ◽  
pp. 333-341
Author(s):  
Yong Bin Zhang ◽  
Tai Yong Wang ◽  
Yan Yu Ding ◽  
Teng Yue Shen ◽  
Jia Jia Dong ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Path Planning ◽  
Parametric Programming ◽  
Programming System ◽  
Improved Genetic Algorithm ◽  
Interactive Programming ◽  
Nc Code ◽  
Nc Program ◽  
Program Experiment ◽  
Cam Software

For path planning and program generation of multi-type holes, this paper presents a method of the path planning, by using the improved genetic algorithm based on chaos algorithm, and develops an interactive programming system for multi-type holes. Users can choose regular holes, and input the parameters and the necessary information, according to their needs. Then the system will combine holes automatically, and calculate the position coordinates of each hole. After that the path planning is carried out by using the improved genetic algorithm. Finally, the system carries out the simulation experiment of the path planning, and outputs NC program. Experiment shows the system can realize the path planning of multi-type holes by a combination of regular holes and generate the NC code after path planning. The optimization of path is better and the operation is more convenient than UG and other professional CAM software.

Development Research of the End Mills Grinding Programming System Based on MATLAB

2013 ◽  
Vol 422 ◽  
pp. 242-246
Author(s):  
Hong Jun Zhang ◽  
Jian Guang Li ◽  
Tian Wei Zhang
Keyword(s):  
Simulation Software ◽  
Cnc Machining ◽  
Programming System ◽  
Development Research ◽  
Machining Simulation ◽  
Nc Code ◽  
Cnc Grinding ◽  
End Mills ◽  
Five Axis ◽  
Grinding Simulation

Using MATLAB for development tools,we has developed a set of end mills CNC grinding programming system by analysis the end mills grinding craft ,research on cutter location trajectory calculation and post-processing technology. Meanwhile, build a five-axis tool grinder grinding simulation processing by VERICUT(a kind of CNC machining simulation software), through the edge grinding simulation , we confirm the cutter location trajectory and the NC code is errorless.

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