The inner diameter of the retaining ring is equal to the diameter of the outer wheel of the aluminum alloy wheel to be tested. The inner side wall of the retaining ring is provided with a built-in clamping groove which is the same as the contour of the top part of the outer rim of the aluminum alloy wheel to be tested, the outer side wall of the retaining ring is fitted to the circumference of the top position of the outer flange of the aluminum alloy wheel to be tested. The retaining ring material provided by the utility model uses a special low-temperature resistant rubber material to carry out proper surface treatment, and the elastic deformation is produced by pressing the retaining ring with a pressure plate, thus filling the gap of the inner concave shape at the rim of the workpiece, the tight combination of the outer rim of the wheel with the pressure plate on the helium detector has been realized, and the distortion of the air-tightness test result caused by the loose seal of the special large-size wheel has been successfully avoided, therefore, the waste of production capacity and resources due to the incorrect judgment of helium detection is reduced.
The inner diameter of the retaining ring is equal to the diameter of the outer wheel of the aluminum alloy wheel to be tested. The inner side wall of the retaining ring is provided with a built-in clamping groove which is the same as the contour of the top part of the outer rim of the aluminum alloy wheel to be tested, the outer side wall of the retaining ring is fitted to the circumference of the top position of the outer flange of the aluminum alloy wheel to be tested. The retaining ring material provided by the utility model uses a special low-temperature resistant rubber material to carry out proper surface treatment, and the elastic deformation is produced by pressing the retaining ring with a pressure plate, thus filling the gap of the inner concave shape at the rim of the workpiece, the tight combination of the outer rim of the wheel with the pressure plate on the helium detector has been realized, and the distortion of the air-tightness test result caused by the loose seal of the special large-size wheel has been successfully avoided, therefore, the waste of production capacity and resources due to the incorrect judgment of helium detection is reduced.
