- High-precision automatic detection of hazardous residues in the manufacturing process based on proven fluorescence measurement technology.
Auxiliary materials such as oils, cutting fluids, polishing fluids, greases, cooling lubricants and release agents in the production process are indispensable in the production process of parts. However, if it remains on the surface of the part, it will interfere with subsequent processes, especially processes that are very sensitive to pollutants such as coating, bonding, painting, printing, and welding. Cleaning is therefore required to remove these contaminants.
[Common problems caused by pollution residue]:
1. The pollutants are not cleaned and cause poor adhesion;
2. The oil residue on the sheet metal parts of automobiles or electrical appliances makes the 100-grid adhesion test or boiling test after spraying unqualified;
3. During the welding of metals such as power battery cell shells, there are pores in the weld seam, resulting in leakage;
4. During gas nitriding treatment, pollutants will interfere with the diffusion of gas and cause soft spots;
In the final analysis, the above reasons are the same: insufficient cleanliness results in insufficient quality and function.
Proven fluorescence measurement technique
After years of development, SITA's handheld and online measuring instruments have been proven to be effective in detecting fluorescent pollutants on the surface of parts. The non-contact cleanliness instrument uses the characteristics of pollutants such as grease, lubricating oil, cooling lubricant and release agent to excite fluorescence under ultraviolet light to detect pollutants. The intensity of fluorescence depends on the content of pollutants. Pollutants The more, the stronger the fluorescence.
innovative system solutions
The FluoScan 3D system from SITA is based on an online fluorescence sensor and a 3-axis fast and precise positioning device. With a scanning speed of 50Hz and an axis movement speed of up to 100mm/s, it can detect fluorescence with high resolution and a large area in a short time pollutants. The measurement and control software, especially the development of the system, can be flexibly adapted to new test tasks. The prefabricated modules of the user program are combined with new test tasks. Depending on the application, specific points, lines and entire surfaces can be inspected. Therefore, it can combine single-point measurement and scanning simultaneously.
Multiple parts of the same type or different types can be placed next to each other on the work surface and the machine can automatically measure one after the other in the form of a multi-part scan.
If it is the same type of part, the measurement program of this part can be copied directly to all other workpieces. The results are presented graphically and some can be directly compared or checked for cleanliness compliance. There is also a measurement data export function for subsequent evaluation and archiving.
Application Case- Die Casting Housing
In the automotive industry, die-cast aluminum housings are used in a variety of areas, from protecting the engine's electronics to gearboxes. The connection between the two housing parts and the influence of the environment and media on the tightness are ensured by bonding with a liquid sealant.
In the die-casting process of the aluminum shell, a release agent is required. If the release agent remains, it will directly affect the effect of the joint, so it needs to be removed by cleaning. Practical experience shows that the cleaning of the deep part of the seal groove is much more difficult than cleaning other parts of the shell, so this part usually has more pollutants remaining.
Before bonding, by directly measuring a large number of points on the sealing groove, its cleanliness can be reliably detected, thereby ensuring the quality of bonding. FluoScan 3D has been proven to be effective in determining process-specific cleanliness limits depending on how clean the bond needs to be achieved or by other relevant testing methods such as pull-off testing.
The cleanliness test results of the sealing groove of the die-cast aluminum shell, the residual pollutant is the release agent
Application case- cleanliness detection of mobile phone shells made of different materials
In the mobile phone industry, in order to meet more needs and differentiation of consumers, major mobile phone manufacturers continue to innovate and develop. In terms of shell materials alone, the smartphone industry has a variety of options such as plastics, metals, glass, and ceramics. Shell forming processes such as stamping, CNC, polishing and other processes will use various coolants, lubricants, polishing fluids, etc. to assist production. Subsequent surface treatment processes such as anodizing, electroplating, sandblasting and AF coating The casing will be effectively cleaned first to ensure that there is no residue of any pollutants on the surface, thereby ensuring the effectiveness of the surface treatment work. Then how to judge the cleaning quality of metal, glass and ceramic shells? SITA's fluorescence measurement technology can provide assistance effectively and reliably. FluoScan 3D scans on the surface of the shell to detect a large number of points, quantify and output the cleanliness of the surface, present the data results and make preliminary predictions based on specific cleanliness limit values. Evaluate.
Different parts and different shapes can be flexibly detected
FluoScan 3D is a testing system for industry to measure the cleanliness of parts of different geometries at high density. Since the fluorescence measurement device is calibrated using SITA's fluorescence standards, the measurement results of all handheld and on-line instruments can be compared.
