Equipment and method for detecting air impermeability of wheel hub

Abstract

The invention discloses equipment and method for detecting the air impermeability of a wheel hub. The equipment comprises a rack, wherein the rack is provided with a power supply, an air source, a conveying mechanism, a sealing pressure mechanism and a charge detection mechanism; the sealing pressure mechanism comprises a first pressing block, the first pressing block is fixedly connected with a rotating shaft, the rotating shaft is connected onto the rack in a rotating manner; the rack is further provided with a rotary table and a stepper motor, the rotary table is driven by the stepper motor to rotate, the rotary table is fixedly connected with a cylinder, the cylinder is fixedly connected with a second pressing block, the first pressing block and the second pressing block are arranged in a matched manner, a gas tube and a first spray point are arranged on the side, close to the second pressing block, of the first pressing block, the gas tube communicates with the air source, a second spray point is arranged on the side, close to the first pressing block, of the second pressing block, the first spray point is electrically connected to one electrode of the power supply, and the second spray point is electrically connected to the other electrode of the power supply. According to the equipment, the air impermeability of the wheel hub can be detected at high precision, and the cost of detection compared with the prior art is relatively low.

Description

technical field [0001] The invention relates to the technical field of auto parts manufacturing, in particular to a device and method for detecting the airtightness of a wheel hub. Background technique [0002] With the vigorous development of the automobile industry, aluminum alloy wheels, as an indispensable part of automobiles, have broad market prospects. However, since the aluminum alloy wheel hub is cast, sand holes may appear during the casting process. These sand holes are difficult to see with the naked eye. If there are sand holes on the wheel hub, it is easy to leak air after the tire is installed. The car is running at high speed. There are potential safety hazards, so quality and safety inspections of aluminum alloy wheels are required. [0003] At present, the air tightness testing methods of aluminum alloy wheels widely used at home and abroad include wet air tightness testing method and helium air tightness testing method. The wet air tightness detection me...

AI Technical Summary

Problems solved by technology

Although the detection accuracy of this detection method is higher than that of the bubble method, the helium gas tightness detection method has the following disadvantages in use: 1. The detection equipment used in the helium gas tightness detection method is expensive. The loss of gas is also relatively large, and helium is expensive as a rare gas, so the overall detection cost is high; 2. There is a certain concentration of helium in the air itself, and it is easy to detect the helium in the air if it is not handled properly. Helium, resulting in inaccurate detection of air tightness; 3. When testing each hub, the entire hub needs to be sealed in a vacuum sealed space, which will lead to more complicated testing operations and higher testing efficiency. Low

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