It is effective in improving the detection accuracy of work that is significantly affected by temperature and volume changes.
The method of simultaneously comparing and measuring two workpieces eliminates error factors such as temperature and deformation, enabling high-precision leak testing. However, when there is an equivalent leak, it may lead to misjudging a good product, and it is not recommended unless the defect rate is extremely low. The multi-comparison method involves conducting the inspection process through master comparison and the simultaneous comparison of two workpieces within a single test process. This allows for high-precision detection while minimizing misjudgments when there are similar leaks.
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basic information
■ Features • Improvement of accuracy for workpieces significantly affected by temperature and volume changes: By conducting simultaneous comparison, the measurement of workpieces with nearly identical conditions of deformation, distortion, and temperature changes eliminates errors, enabling high-precision inspections. The use of master comparison minimizes the rate of misjudgment, reducing the likelihood of overlooking leaks even when both workpieces have similar levels of leakage. • Reduction of inspection time: By applying pressure to both workpieces and the master simultaneously, inspection time is shortened. • Capability to inspect three items simultaneously: It is also possible to compare and detect three workpieces without using a master. • Master preset function to enhance inspection accuracy: The master preset function corrects differential pressure caused by factors other than leaks, such as environmental temperature. This function operates during both master comparison and simultaneous comparison processes.
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Applications/Examples of results
The air leak tester is an automatic leak testing machine that detects minute pressure changes by applying air pressure or exhausting to a vacuum, providing a judgment on the quality of parts or finished products that require airtightness. Engine parts / engine valve seats / cam caps / cylinder blocks / engine assemblies / crankcases / cylinder heads / oil pans / crankshafts / cylinder head covers / camshaft balls (plugs) press-fitted / cylinder pistons / fuel system components / PE, VE pumps / injection valves / canisters / carburetors / throttle chambers / throttle bodies / delivery pipes / filler caps / fuel injectors / fuel quick connectors / fuel senders / fuel tanks / fuel pipes / fuel pumps / fuel pump check valves / fuel pump relief valves / common rails / vent valves / engine assembly fuel systems / intake and exhaust parts / EGR pipes / PCV valves / intercoolers / intake manifolds / inlet pipes / exhaust manifolds / throttle bodies / turbochargers / bearing cases (for turbo) / mufflers, etc.
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Company information
The Air Leak Tester from Cosmo Instruments started with the automation of cylinder block airtightness testing in 1970. It is utilized in various fields such as automotive parts, gas, water supply, medical, electrical, electronics, and food industries. Since 1983, we have begun our overseas expansion in line with the overseas development of Japanese automotive manufacturers. Currently, we are conducting proposal activities and after-sales service activities similar to those in Japan from 24 locations in 13 countries. Recently, to respond to the electrification of automobiles, we have enabled leak testing of electrification components such as battery cases and inverters, as well as fitting tests for various power connectors, contributing to our customers' CO2 emission reduction efforts. Additionally, we have donated pressure measurement equipment to technical schools in South Asia and Southeast Asia to improve the quality of education, engaged in technical exchanges with local machinery manufacturers, and worked to enhance the industrial foundation through the production of high-quality leak testing equipment locally. We will continue to deliver the value of "quality" by applying our wisdom on-site for our customers and to contribute to the development of local communities.