Mono Calcium Phosphate ,the chemical formula is Ca (H2PO4)2.H2O, molecular weight of the body is 252.06, after dryed the product is white or slightly yellow micro powder or granules, the relative density of 2.22 (16 °C). Slightly hygroscopic, soluble in hydrochloric acid, nitric acid, slightly soluble in cold water, almost insoluble in ethanol. At 30 °C, 100 ml of water soluble MCP 1.8g. The aqueous solution was acidic, heating the aqueous solution can get calcium hydrogen phosphate. Lose crystal water at 109 °C and decomposed into calcium metaphosphate at 203°C. Applications:Monocalcium Phosphate is used to supply mineral nutrition such as phosphorus (P) and calcium (Ca) for animal, which can be easily digested and absorbed. Extensively applied as additives of Phosphorous and Calcium in aquatic animals feed.Higher water solubility of MCP is required in aquatic animals feed.
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Application of joint arm scanner to measure wheel spoke thickness
Spokes are one of the most important components of a car, and are of great significance to the safety of the car and the aesthetic appearance of the car. With the continuous development of the automobile industry, people's requirements for automobile spokes are getting higher and higher. How to improve the safety and reliability of automobile spokes and extend the service life of automobile wheels through advanced science and technology and processing technology. It has become one of the most concerned issues in the entire industry. This article will focus on how to use the section arm scanner to complete the measurement of wheel spoke thickness; through the use of this measurement method, the detection efficiency and reliability of spoke thickness can be greatly improved, and it has an important guiding role in the processing of similar parts.
The spokes, which are part of the wheel that connect the rim and the hub, are important means of protecting the wheel rims and spokes. In order to reduce the weight while ensuring the strength of the spokes, the spokes are usually designed with different strengths and thicknesses, and the steel plates are mostly processed as blanks. The processing method is to first process the blank into a designed shape by a spinning method, and then perform a process such as punching and shape rest. How to ensure the accuracy of spoke thickness will greatly determine the strength and service life of spokes. Good spokes can not only ensure the stability and safety of the car during driving, but also avoid problems caused by wear and tear of the car tires. The possibility.
Figure 1 Multiple spokes
In the process of detecting traditional auto parts, when encountering problems such as thickness, the more common method is to use traditional measuring tools such as dial gauges or calipers for measurement. This method can also be used to measure some well-processed planes. Reluctant to use, but this type of traditional method is difficult to use when encountering the type of spokes is complex, especially when there are a lot of curved parts. Moreover, this method can only measure the thickness of a part of the point, and can not fully reflect the overall condition of the part, so it can not meet the requirements of modern processing technology. So how to quickly and effectively complete the thickness detection requirements of this type of parts? The emergence of the articulated arm scanner just solved this problem.
The articulated arm measuring machine is a new type of coordinate measuring machine with high precision, small size, light weight and easy to carry. The equipment has extremely low requirements on the external environment, can be used normally in an environment of 0-50 °C, and can be applied to various environments such as laboratories and workshops, and can realize all functions of the traditional fixed three-coordinates. Used in automotive parts, engineering machinery, aerospace, sports equipment, shipbuilding and other industries. The articulated arm measuring machine can be tested with a hard probe or a laser scanning probe depending on the type of measurement size. When measuring spoke thickness, we want to get comprehensive and complete data, so the articulated arm measuring machine equipped with laser scanning probe will be the first choice for our measurement.
Point cloud data scanning process
To make an accurate assessment of the thickness of spoke parts, we must first obtain complete spoke point cloud data. Taking into account the machining dimensions and accuracy requirements of spoke-type parts, we can choose ROMER RA7525SI series measuring machine to obtain point cloud data. If there is a suitable loading tool, we can erect the product on both sides of the spoke to complete the scanning of all the data at one time. If it is not convenient to install the card, we can use the hot-melt silicone to fix three steel balls on the surface of the spoke. The steel ball needs to be fixed. The position that can be swept when scanning the data on both sides of the part, so that the complete data on both sides of the part can be obtained by two scans.
Splicing of point cloud data
In Geomagic Qualify software, the steel balls on the scanned two point cloud data are defined as spheres, one piece of data is defined as a reference datum, and the other piece of data is defined as test data, and the sphere is defined by means of feature-based alignment. One-to-one correspondence, the data is spliced ​​and combined into one overall data, and the data of the steel ball part that is no longer needed is deleted.
Figure 2 Fixing the steel ball on the scanned part
Figure 3 Scanning to get the positive and negative sides of point cloud data
Processing of point cloud data and establishment of coordinate system
Geomagic Qualify software can perform thickness analysis of scanned data, but it needs to convert scanned point cloud data into face format first. We can first do the noise reduction of the point cloud data, then retain the edge data for data filtering and sampling, and finally convert the point cloud data into a triangular mesh surface format through the encapsulation command, and the data can be saved in the STL format.
Figure 4 Triangle mesh surface obtained after point cloud data encapsulation
The bottom surface is created as a planar feature on the encapsulated data, and the center hole is created as a circular feature, and a point feature is acquired on the bottom plane as needed, and the created center and point are constructed as line features. Then create a coordinate system, the plane can be created as an XY plane, the line is created as a positive X direction, and the center of the circle is defined as the origin, then the coordinate system is established.
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