Recognizing Algorithm for Digitized Rotational Parts

2014

AMM

Self Cite

Incremental forming is one of the manufacturing methods which uses relative simple technological equipment and can assure a high rate of the process flexibility. These requirements can assure the efficiency demanded by the industrial market, in the case of small production batches, which occur more and more often nowadays. To ensure the stability of the process, the required quality and dimensional accuracy of the parts have to be well controlled. This requires the evaluation of the parts dimensions by certain measurements. For hollow parts, the measurement of their thickness is always a challenge, mainly when the dimensions are smaller and their depth is greater. This paper presents a digital method for the parts dimensional evaluation and analysis, which can be very accurate and does not need mechanical contacts with the part during measurements. The parts were scanned with a 3D blue light scanner, on their both sides and then the data was processed into specialized software, to obtain the parts digital surface from the 3D scanned data. The digital data was compared with the theoretical approach, to establish some conclusions on the validity of the sinus law and to point out the critical zones, where the thinning is strong and may cause fractures. The digital scanning method presented can be used also for quality control and inspection, as the processing steps are considered user-friendly and easy to adapt to certain specific requirements.

Section: Description Of the Methods For Digital Measurementmentioning

confidence: 99%

Digital Scanning Method for Thickness Analysis of Hollow Parts Manufactured by Incremental Forming on a CNC Lathe

Neagoe

Filip

2014

AMM

Self Cite

“…As well, using a piece of software designed by the authors [10] the axis of the active surfaces of the tools could be found. That revealed the axes of the two tools were parallel, but not placed in the same vertical plane.…”

Section: Using 3d Scanning To Evaluate the Shape Size And Relative Po...mentioning

confidence: 99%

Aligning Tools on a Press by Means of 3D Scanning

Drăgoi

Vasiloni

2016

AMM

The paper presents the way the 3D scanning was used to correct miss-alignment of the tools on a metal sheet bending press. Parts obtained by bending where not conform to requirements, and the reason was unknown. In order to find the error, the shape, size, and alignment of bending board and stamp had to be checked. The particular very long tools imposed as the single appropriate method of measurement: 3D scanning. The point clouds gathered by 3D scanning were processed to get the 3D models of the tools. Analyzing the models of the tools and their relative position led to conclusions that revealed the error and allowed fixing the problem.

“…The first software system, named Rotational Primitives and Axis Recognition-RPAR, is conceived for its use in RE process of rotational parts. It has implemented a set of algorithms [5] and it is used for recognizing rotational primitives and axis for parts which contains rotational surfaces, from a cloud of points. The designer can choose, through a special interface, one of the next commands:…”

Section: Cloud Of Pointsmentioning

confidence: 99%

“…1. primitives recognising: cylinder, cone or sphere are recognized, their associated data are determined and they are exported in text files [5]; 2. axis recognising: axis position of a rotational surface is determined and two points, which belongs to it, then is exported in text file; 3. axis optimising for cutting process: the axis position of a cylinder is optimized to obtained minimum cutting depth for turning process [6]; 4. section extracting: from the cloud of points a section is extracted and exported in a text file. For example, in a cylindrical surface case, the data which are determined by the system are: the axis position and the geometrical parameters (diameters and length).…”

Section: Cloud Of Pointsmentioning

confidence: 99%

Customized Software Tools Integrated in Reverse Engineering Process of Rectangular Parts with Holes

Oancea

Bădan

et al. 2013

AMM

Self Cite

This paper presents how in the Reverse Engineering process can be integrated specific software tools, developed by the authors, which allow for digitized rectangular parts with internal surfaces of revolution, to obtain solid models and CNC program. The first tool named Rotational Axis Primitives and Recognition has implemented a set of algorithms and it is used for recognizing, from a cloud of points associated with a rotational part, the axis and geometrical parameters. The second tool named Hole_Application is created for forward engineering and it can be used to design and manufacture the industrial products with rectangular shape using intelligent technological objects for holes.