Challenges and Choices in the Specification and Implementation of the STEP-NC AP-238 Standard

2007 ◽  
Vol 7 (3) ◽  
pp. 283-291 ◽  
Author(s):  
Martin Hardwick ◽  
David Loffredo
Keyword(s):  
Cnc Machining ◽  
Manufacturing Processes ◽  
Key Factors ◽  
Process Data ◽  
Design Data ◽  
Tool Paths ◽  
Cad Cam ◽  
G Code ◽  
Code Standard ◽  
Iso 6983

STEP-NC AP-238 is the result of a ten-year effort to replace the RS274D (ISO 6983) M and G code standard with a modern associative language that connects CAD design data to CAM process data. STEP-NC builds on previous work to develop a neutral data standard for CAD data and uses the modern geometric constructs of that standard to define device-independent tool paths, and CAM-independent volume removal features. This paper describes four key factors, or challenges, that had to be addressed to extend STEP-NC AP-238 functionality beyond that offered by other CNC standards. The four factors are difficulties inherent in all CAD/CAM integration projects and can be summarized as follows: the information complexity of geometry, the volume of attributes defined for manufacturing processes, the difficulties of integrating models that span CAD and CAM, and the requirement for easy implementation. We describe an advanced CNC application that uses these four factors and show how STEP-NC AP-238 enhances CNC machining and measurement.

scholarly journals A Roadmap for STEP-NC Enabled Interoperable Manufacturing

2011 ◽  
Author(s):  
Martin Hardwick ◽  
Fiona Zhao ◽  
Fred Proctor ◽  
Sid Venkatesh ◽  
David Odendahl ◽  
...  
Keyword(s):  
International Collaboration ◽  
Data Model ◽  
Data Exchange ◽  
Process Data ◽  
Design Data ◽  
Tool Paths ◽  
Design Requirements ◽  
Nc Data ◽  
Code Standard ◽  
Iso 6983

STEP-NC is the result of a ten-year international effort to replace the RS274D (ISO 6983) G and M code standard with a modern associative language. The new standard connects CAD design data to CAM process data so that smart applications can understand both the design requirements for a part and the manufacturing solutions developed to make that part. STEP-NC builds on a previous ten-year effort to develop the STEP standard for CAD to CAD and CAD to CAM data exchange, and uses the modern geometric constructs in that standard to specify device independent tool paths, and CAM independent volume removal features. This paper reviews a series of demonstrations carried out to test and validate the STEP-NC standard. These demonstrations were an international collaboration between industry, academia and research agencies. Each demonstration focused on testing and extending the STEP-NC data model for a different application.

scholarly journals Identification of Granule Growth Regimes in High Shear Wet Granulation Processes Using a Physics-Constrained Neural Network

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 737
Author(s):  
Chaitanya Sampat ◽  
Rohit Ramachandran
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Real Time ◽  
Data Driven ◽  
Wet Granulation ◽  
Manufacturing Processes ◽  
High Shear ◽  
Process Data ◽  
Physical Constraints ◽  
Granule Growth

The digitization of manufacturing processes has led to an increase in the availability of process data, which has enabled the use of data-driven models to predict the outcomes of these manufacturing processes. Data-driven models are instantaneous in simulate and can provide real-time predictions but lack any governing physics within their framework. When process data deviates from original conditions, the predictions from these models may not agree with physical boundaries. In such cases, the use of first-principle-based models to predict process outcomes have proven to be effective but computationally inefficient and cannot be solved in real time. Thus, there remains a need to develop efficient data-driven models with a physical understanding about the process. In this work, we have demonstrate the addition of physics-based boundary conditions constraints to a neural network to improve its predictability for granule density and granule size distribution (GSD) for a high shear granulation process. The physics-constrained neural network (PCNN) was better at predicting granule growth regimes when compared to other neural networks with no physical constraints. When input data that violated physics-based boundaries was provided, the PCNN identified these points more accurately compared to other non-physics constrained neural networks, with an error of <1%. A sensitivity analysis of the PCNN to the input variables was also performed to understand individual effects on the final outputs.

Design of Temperature Monitoring System Based on MSP430

2011 ◽  
Vol 301-303 ◽  
pp. 1162-1165
Author(s):  
Fei Hu ◽  
Wen Qing Yin ◽  
Cai Rong Chen
Keyword(s):  
Monitoring System ◽  
Simple Structure ◽  
High Accuracy ◽  
Temperature Monitoring ◽  
Low Power Consumption ◽  
Key Factors ◽  
Process Data ◽  
Long Distance ◽  
Fast Acquisition ◽  
Digital Temperature Sensor

The Greenhouse Temperature Is one of the Key Factors for Controlling the Growth of Crops. Traditional Methods of Temperature Monitoring Can Not Meet the Modern Greenhouse Requirements of High Accuracy, Fast Acquisition and Response. a Greenhouse Temperature Monitoring System Based on MSP430 Was Designed. this System Uses Digital Temperature Sensor DS18B20 to Measure Temperature, MSP430 to Process Data and Transmit Data to the Host Computer through RS485 Bus, Realizing the Real-Time Detection and Long-Distance Transmission of Greenhouse Temperature. this System Has the Features of Simple Structure, Low Power Consumption, Stability and Strong Portability Etc.

scholarly journals Viability of the Digitalization of Dental Laboratory in Bacolod City

2020 ◽  
Vol 3 (2) ◽  
pp. 31-32
Author(s):  
Paul Brian S. Mendez ◽  
Rizalie N.E. Mibato
Keyword(s):  
Computer Aided Design ◽  
Data File ◽  
Dental Restoration ◽  
Design Data ◽  
Dental Patients ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design ◽  
Improved Accuracy ◽  
The City

Dentistry has evolved from its origin to the present day, becoming almost entirely digitized and supervised. The digitalized dental laboratory saves time due to computer-aided design and computer-aided manufacture (CAD/CAM) technology, which will capture and display clients' tooth or teeth and gums on a 3D image on a computer screen sent to the lab.  It enables a dental lab technician to work faster and get the perfect design of the digital dental restoration. The main advantage of digitalization includes faster and improved efficiency on the turn-around time of devices, like crowns and bridges, and improved accuracy of procedures and manufactured gadgets. Digitalization Dental Laboratory (DDL) is the first to offer a digital dental lab in the city of Bacolod. The service allows laboratories to design the prosthesis digitally from in-house CAD software and email the design data provider or download the data file into a proprietary web host or server. The lab will cater to the digital needs of dental patients of the Multi-Specialty Dental Center (a sister company of DDL) and other dental clients.

Internet-Based Delivery of CAD/CAM Capability: An Industry Case Study

1998 ◽  
Author(s):  
Simon Szykman ◽  
Ram D. Sriram
Keyword(s):  
Small Businesses ◽  
Computer Aided Design ◽  
Data Exchange ◽  
Engineering Industry ◽  
Product Development Process ◽  
The Internet ◽  
Design Data ◽  
Computer Aided ◽  
Cad Cam

Abstract This paper presents a case study in the use of the Internet as a medium for exchange of information and delivery of computer-aided design and computer-aided manufacturing (CAD/CAM) capability. The case study describes a collaboration among researchers and staff at the National Institute of Standards and Technology (NIST), and Thar Designs, Inc., a small business in Pittsburgh, PA that designs and sells high-pressure fluid pumps. The objective of this case study is to identify the needs of small businesses in engineering industry in the area of Internet-based CAD/CAM services. The Internet-based interaction performed in this study encompassed various stages in an iterative product development process, consisting of design, data exchange, manufacturability analysis, and fabrication of a prototype.

From Modeling to 3D Printing

2017 ◽  
pp. 25-37 ◽  
Keyword(s):  
3D Printing ◽  
Internal Representation ◽  
Modeling Process ◽  
Wire Frame ◽  
G Code ◽  
3D Printers ◽  
Boundary Representations ◽  
Code Standard ◽  
Printing Parameters ◽  
Bézier Spline

Geometric or 3D modeling playing key role in geometry definition. These modelers evolved from wire-frame models to Boundary representations or CSG models in solid modeling or Bezier spline or Non-uniform rational B-spline representation. After modeling process, using internal representation, part will be post-processed for manufacturing. Variety of postprocessors existing, and using unique G-code standard we producing on CNC machines requested parts. 3D Printers use the same G-Code standards with extensions for more than ten M functions that programmers use for setting 3D printing parameters different than we using for CNC manufacturing. List of M functions varies depend of the manufacturer.

Implementation of Rapid Manufacturing Systems in the Jewellery Industry in Brazil

2011 ◽  
pp. 119-138
Author(s):  
Juan Carlos Campos Rubio ◽  
Eduardo Romeiro Filho
Keyword(s):  
Computer Aided Design ◽  
Manufacturing Systems ◽  
Medium Size ◽  
Manufacturing Processes ◽  
Computer Aided ◽  
Design And Manufacturing ◽  
Cad Cam ◽  
High Production ◽  
Rapid Prototyping And Manufacturing ◽  
Aided Design

This chapter presents the rapid prototyping and manufacturing concepts applied as means to reducing time between jewellery designs and manufacturing process. Different processes on jewellery modelling production are presented. Nowadays, the use of technologies as CAD/CAM - Computer Aided Design and Manufacturing in high production companies are very disseminated. However, the implementation of these resources at the design and manufacturing processes of jewels and fashion accessories, in small and medium size businesses, is still insipient. As reference, is presented the situation observed in small and medium companies located in Minas Gerais, Brazil.

scholarly journals Combination of Digital and Conventional Workflows in the CAD/CAM-Fabrication of an Implant-Supported Overdenture

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3688
Author(s):  
Michael Benno Schmidt ◽  
Angelika Rauch ◽  
Marcus Schwarzer ◽  
Bernd Lethaus ◽  
Sebastian Hahnel
Keyword(s):  
Case Report ◽  
Selective Laser Sintering ◽  
Digital Manufacturing ◽  
Manufacturing Processes ◽  
Dental Practice ◽  
Current Case ◽  
Future Developments ◽  
Lower Jaw ◽  
Cad Cam ◽  
Upper Jaw

Completely digital workflows for the fabrication of implant-supported removable restorations are not yet common in clinical dental practice. The aim of the current case report is to illustrate a reliable and comfortable workflow that reasonably merges conventional and digital workflows for the CAD/CAM‑fabrication of implant-supported overdentures. The 53-year old patient was supplied with a digitally processed complete denture in the upper jaw and, simultaneously, with an overdenture supported by four interforaminal implants in the lower jaw. The overdenture included a completely digitally processed and manufactured alloy framework that had been fabricated by selective laser sintering. The case report indicates that digital manufacturing processes for extensive and complex removable restorations are possible. However, as it is currently not yet possible to digitally obtain functional impressions, future developments and innovations might focus on that issue.

Statistical Methods in the Automotive Industry

2015 ◽  
Vol 791 ◽  
pp. 56-62
Author(s):  
Ewa Golińska ◽  
Marcin Zemczak
Keyword(s):  
Decision Making ◽  
Quality Management ◽  
Statistical Process Control ◽  
Statistical Methods ◽  
Automotive Industry ◽  
Manufacturing Processes ◽  
Key Factors ◽  
High Quality ◽  
Statistical Process ◽  
Decision Making Processes

Controlling of the manufacturing processes is one of the key factors that allow companies to produce goods of high quality. In the article one of methods of the quality management - statistical process control (SPC) has been discussed. On the example of the car headrests manufacturing enterprise benefits from applying this method have been presented. Authors pointed out that the use of statistical methods in decision-making processes must not be difficult and time-consuming, if is being supported by a computer with using inexpensive tools.

scholarly journals Integrated Interface Development Environment using STEP Universal Data Structure

2018 ◽  
Vol 7 (2.15) ◽  
pp. 27 ◽  
Author(s):  
T M.S. Tg Sulaiman ◽  
S B. Mohamed ◽  
M Minhat ◽  
A S. Mohamed ◽  
A R. Mohamed
Keyword(s):  
Data Structure ◽  
Relevant Information ◽  
Design Development ◽  
Product Model ◽  
Input Language ◽  
Development Environment ◽  
3D Cad ◽  
Cad Cam ◽  
G Code ◽  
Modern Manufacturing

Nowadays modern manufacturing demands advanced computer controller, having higher input language and less proprietary vendor dependencies. STEP stands for Standard for the Exchange of Product model data is the next generation of data model between CAD/CAM and CNC system. STEP is still under research and development all around the world. This paper describes the design, development and testing of an integrated Interface development environment for STEP file using Universal Data Structure, which aims to provide support for machining operation.  The system also aims to provide function of reading and extracting the relevant information associated with the machining data and to write the G-Code file. The sample of machined block is designed from 3D CAD modeler which consisted of features need to be machined from a blank workpiece and saved in the STEP file format. The validation process will be done using the simulation in the Mach3 software.  

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