Automotive Industry

Automobile transmission makers use our leak detection machine to verify the transmission housing will not leak any transmission fluid. The lower requirements for tightness allow testing with „ambient air.“ The mass spectrometer detects the test gas (ambient air). Due to low production numbers and the unwieldy test piece, vdh designed a semi-automatic leak detection machine, which means the feeding of the test pieces into the tester is carried out manually.

Test piece is the transmission housing. It consists of three chambers, which are connected to each other. During the test cycle, each chamber is tested individually and after that the entire chamber system is tested for tightness. For this, the chambers are sealed against each other within the housing. Vacuum is created in the chambers with certain valve switchings and the air entry from the outside is measured.

vdh developed a leak detection machine for manufacturers of refrigeration lines in the automotive industry, that measures the level of leakage present in the lines. The leak detection is carried out with working pressure (40 bar). This puts high pressure loads on the sealing tools for this test unit. The tester is fed manually with the test pieces. The helium test gas method with detection via mass spectrometer is used. The test gas is recovered after each test has been completed.

The pieces to be tested are flexible refrigeration lines, which are about 2 meters long. The lines are sealed on both sides and filled with helium on the inside. Via a vacuum, which is created on the outside of the lines, the penetration of test gas through the walls of the refrigeration lines can be measured. Two lines are tested at the same time during one test cycle.