Using Hualang 3D scanner HL-3DS combined with reverse design technology to carry out data collection and 3D surface reconstruction of the existing automobile wheels, which solves the problem of difficult measurement and design of the wheel surface, and uses Geomagic Qualify to compare and analyze the 3D model and the entity. In order to obtain an accurate reconstruction model. Thereby improving the accuracy of product design, greatly shortening the product development design and processing cycle and reducing costs.

Practical problem

1. It is necessary to quickly obtain the three-dimensional digital model of the automobile wheel hub, and the maximum error of the manufacturing size does not exceed 0.1mm. Using traditional inspection methods (such as inspection tools, jigs, three-coordinates, etc.) is very cumbersome and time-consuming, and it is not easy to accurately and quickly measure and inspect the structure of automobile wheels.

2. The wheel hub is generally a complex free-form surface with multiple uniform spokes, and each spoke is composed of multiple spokes with different curvatures. The contact surface between the center hole of the hub and the drive shaft is the benchmark, and the pitch of the screw holes is the matching size, which requires high precision. Traditional measurement method.

Holon solutions

3D scanning of automobile wheels

Automobile wheels are an important part of automobile parts. Hualang 3D scanner HL-3DS can obtain complete 3D data of automobile wheels, analyze the automobile wheels in full size through inspection software, and finally generate detailed inspection reports. Any position deviation can also be displayed numerically, which can completely replace the traditional detection methods used in the quality detection and reverse design of automobile wheels.

1. Preliminary preparations

Spray developer: improve the contrast of the background color on the surface of the sample and obtain better scan data.

Paste the mark points: enable the acquired data to be positioned and spliced in the scanning software.

2. 3D scanning

The 3D scanner (HL-3DS) has a fast scanning speed. It only takes 10 minutes to obtain the 3D data of the car wheel, and the data accuracy is as high as 0.02mm. The three-dimensional scanner (HL-3DS) uses extrapolation multi-frequency phase shift grating technology, code point calibration technology and automatic splicing technology. Import the 3D data of automobile bumper mold into 3D reverse software (Geomagic) for processing.

Car wheel point cloud data

Car wheel STL data

3. 3D inspection

Import the acquired three-dimensional data of automobile wheels into the inspection software Geomagic Qualify, which can quickly detect the difference between the automobile wheel (CAD) model and the manufactured parts of the product. Geomagic Qualify can show the difference between the two with intuitive and easy-to-understand graphical comparison results. . If there are protrusions or recesses in any position, the relative position information of each hole position and assembly position can also be analyzed through software.

Car wheel comparison test

Error Analysis of Cross Section of Automobile Wheel Hub

Columnar analysis diagram of automobile wheel hub

Automobile wheel error analysis table