Large Aluminum Casting in the casting process, due to the deformation and Aluminum Casting sand molding deformation resulting from the contraction will cause errors. If because of deformation or contraction resulting from insufficient size Aluminum Casting Machining Aluminum Casting the lead the whole retirement, causing huge losses to the enterprise. Aluminum Casting rapid detection of pre-critical size, can determine the subsequent processing of the margin is Automatic Control Valves qualified, can increase mold production cycle, can create considerable economic benefits for the enterprise.

Detection of Large Aluminum Casting dimensions in addition to testing, another use is based on detection of a critical size for each input to the processing center, to reduce residual feed processing center, processing center to improve the processing efficiency of the follow-up, but also to avoid the machining center tool damage.

3D measurement of large workpieces, the present popular international new technology called 3D photogrammetry or photographic measurement. The technology is based on the basic principles of visual development 3D calculations, that if the space 2 (or 2 or more) different positions to see the same point, then the spatial coordinates of the points can be calculated. Tested by placing the object reference point and the scale and using high-resolution digital camera photos, photo software can be automatically processed to calculate the 3D coordinates of reference points.

For large-scale mold factory, also can measure Aluminum Casting dimensions to calculate the contraction coefficient of a bubble model in order to determine a more accurate machining allowance.

As the size of very large Aluminum Casting, handling very difficult and there are issues of secondary orientation, it is difficult to use traditional contact-type coordinate measuring machine, and the relatively low efficiency of traditional CMM. Some manufacturers coordinate with the gantry, theodolite, articulated arm measuring devices such as 3D measurement, but measurement of very slow and can not raise the mold production cycle coach bags

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