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When 3D Scanning Meets Precision Casting

When 3D Scanning Meets Precision Casting

Precision casting, an advanced process in machinery manufacturing, is a lost wax casting process widely used for producing ferrous and nonferrous metal parts. It produces net shape parts with excellent surface finish and dimensional accuracy. Therefore, products can be used directly without re-machining.

Comparing the blank with the digital 3D model is used for reprocessing the surface with large deviations, which will facilitate the casting reaching higher standards and reduce the workload. However, traditional methods are difficult to precisely calculate the deviations of complex casting and mold. Therefore, the efficient and accurate 3D inspection is significant to mechanical manufacturing.

What customer needs?

Compared with the original 3D model, casting usually has obvious deviations, and the shape is irregular. The traditional inspection method is not easy to operate and time-consuming, hence, it is hard to obtain comprehensive and intuitive inspection results. Except for detecting deviations, the customer also needs to know the specified geometric tolerances.

ScanTech 3D Solution

To get the full 3D data of the casting and concave model cavity, we use HSCAN 3D scanner to finish the whole inspection. By using 3D software ScanViewer to fit and align the data, we will obtain comprehensive deviations and geometric tolerance values.

handheld 3D laser scanner

3D Scanning Process

Step 1. attach markers on castings

Step 2. use HSCAN 3D scanner to scan castings and molds

Step 3. data fitting and alignment for 3D inspection

Step 4. product optimization based on inspection data

Molds Scanning

Object 1. casting connecting rod

Time cost:

Attaching markers: 2 minutes

3D scanning: 5 minutes (resolution set to 0.6mm)

point cloud data of rod

Point cloud data

stl data of rod

Stl data
Color map

Object 2. casting piston

Time cost:

Attaching markers: 2 minutes

3D scanning: 5 minutes (resolution set to 0.6mm)

3d data of casting

Point cloud and stl data

 

Color map

Object 3. concave die

Time cost:

Attaching markers: 2 minutes

3D scanning: 4 minutes (resolution set to 0.6mm)

point cloud data of die

Point cloud data

stl data of die

Stl data
Color map

Geometric tolerance measuring

The customer requires to measure the distance between the two cone axes on the concave die. The method is to establish features between axes and the surface of the die, and respectively create point features at the intersection. Finally, the distance can be calculated by measuring the length of two points.

Standard geometric tolerance value

Standard geometric tolerance value

Measured geometric tolerance data

Measured geometric tolerance data

3D laser scanning technology greatly improves the speed and quality of the inspection comparison. Handheld 3D scanners efficiently overcome the shortcomings when measuring the deviations of the irregular castings.

For more cases about molds inspection, please read:

3D Mold Scanning – A Revolution for Machinery Manufacturing

How to Quickly Perform 3D Inspection on Complex Mould?

Detail Capturing of Precision Parts by PRINCE 3D Scanner

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