We will introduce a method for reverse engineering simple-shaped workpieces with higher precision.
Commonly used methods for obtaining point cloud data for reverse engineering include 3D laser scanners and X-ray CT devices. However, regardless of how precise the equipment used is, an error of approximately ±0.05 to 0.1 mm occurs during data acquisition. Since the scan data is based on these initial errors, it can be said that achieving highly reproducible reverse engineering is nearly impossible. To improve reproducibility, there are methods to correct CAD drawings by incorporating actual measurements using calipers or micrometers, but there are limitations to the shapes and dimensional accuracy that can be measured with small tools. Our company has been providing measurement services using high-precision measuring instruments such as three-dimensional measuring machines and shape measuring machines for many years, enabling us to perform high-precision reverse engineering leveraging our advanced measurement technology. In this blog, we will introduce high-precision reverse engineering methods for simple-shaped workpieces.
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basic information
The work procedure is as follows: 【Step 1】 Acquire point cloud data of the workpiece shape using a 3D laser scanner. 【Step 2】 Create polygon data using modeling software. 【Step 3】 Perform dimensional measurements using a three-dimensional measuring machine. 【Step 4】 Extract cross-sectional shapes from the polygon data created in Step 2 and convert it to 3D CAD using the precise measurement data from Step 3. 【Step 5】 Obtain several coordinates of the workpiece surface using the three-dimensional measuring machine and compare them with the CAD data created in Step 4. (Using CAT1000S) In this case, reverse engineering was performed within a margin of error of ±0.008mm. Since the measurement error of the three-dimensional measuring machine is approximately ±a few micrometers, the reproducibility of the modeled CAD data against the actual sample can theoretically be kept within an error of about ±a few micrometers. (However, areas where precise measurement cannot be corrected in CAD will remain at the usual error level.) High-precision reverse engineering has good reproducibility, but it requires more man-hours than usual, so it is also possible to focus only on the parts of the shape that require high accuracy.
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Delivery Time
※The delivery date may vary depending on the content and quantity, so please feel free to contact us.
Applications/Examples of results
The equipment and software used are as follows: ■ 3D Laser Scanner (Nikon: MMDx50) ■ Coordinate Measuring Machine (Mitutoyo: Crysta-Apex S9168) ■ 3D Modeling Software for Reverse Engineering (3D Systems: Geomagic Design X) ■ 3D CAD Software (Dassault Systèmes: SOLIDWORKS) ■ Freeform Surface Evaluation Software (Mitutoyo: CAT1000S)
Company information
To support the digitalization of the development and manufacturing processes in manufacturing, we provide a one-stop service for a series of technical services from "reverse engineering" to "prototyping and processing" to "evaluation and experimentation." To implement new processing technologies and production techniques such as 3D scanning, reverse engineering, 3D printing, and resin molding in actual sites, extensive verification and evaluation are required. By outsourcing these processes to us, we believe it will lead to a more effective use of your management resources. Please take advantage of our technical support services for the development, design, prototyping, and evaluation processes in manufacturing, built on the expertise we have cultivated over 20 years of supporting manufacturing development and contract evaluation services.
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