Project description
In process of large castings, both the deformations of sand molding and contraction will lead errors. The insufficient dimensions due to castings deformation or contraction, it will cause the entire casting scrap and may lead to a heavy loss for the enterprise as a result. Advanced rapid inspection for castings critical dimensions can ensure the subsequent processing headroom to be qualified, and shorten the mold processing time. It will create considerable benefit for enterprises definitely.

Besides the inspection for shape and size, another main function of large castings inspection is to reduce the feed allowance of processing center, while improving the processing efficiency of subsequent processing center and avoiding tool loss by input every critical dimensions to processing center.

For large factories, we can also determine a more accurate machining allowance by calculating the castings' coefficient of contraction according to casting measurements.

Deficiencies of traditional solution
Because of the size of large-sized casting, it's very difficult to transport and there is the issue of secondary orientation so that it is difficult to use CMM to measure for it's relatively low efficiency. Some manufacturers use gantry coordinate, theodolite, articulated arm measuring devices to measure, but it is very slow so that it can not shorten the cycle of mold manufacturing .

Advantages of Shining3D solutions
Rapid inspection: capture parameter rapidly.

Precision requirement: Precision of each dimension must be controlled within 0.1mm.

Efficiency improvement: Shorten the cycle of mold manufacturing and create value for corporation.

Equipment recommendation：Shining3D- Scanner + Shining3D-Metric

Inspection process
1.Affix feature-points :
Placed casting in workshop or a large outdoor place where it is easy to operate, clean, coating imaging agent, affix feature-points, place ruler.
Affix feature-points on site.

2.With advanced SLR provided by Shining3D-Metric, we can get pictures of the large-sized casting from different angles which is used for frame point extraction.

3.Shining3d-Metrtic measurement software calculate frame point
 
 
 
Input pictures into the Shining3D-Metric measurement software, according to the triangulation principle, we can calculate the frame point of large-sized casting.
（The right shows the Shining3D-Metric software is calculating the cloud point）



4. Use 3D scanner to scan the framework of auto
After Shining3d-Metrtic software obtain the coordinates of the casting, use Shining3D- Scanner for data scanning and registration under the global coordinate system, thus effectively eliminate the accumulated error and improve the accuracy . （pictures after partial scan）