Non-contact type ultrasonic flaw-detecting machine for hollow car axle

Abstract

The invention discloses a non-contact type ultrasonic flaw-detecting machine for a hollow car axle. The non-contact type ultrasonic flaw-detecting machine comprises a chassis, a machine body, a feeding mechanism, a detection control system and a lifting mechanism, wherein a universal walking wheel is arranged at the bottom of the chassis; a control handle is arranged on one side of the chassis; the lifting mechanism is mounted on the upper surface of the chassis which is located on the other side opposite to the control handle mounting side; the feeding mechanism is arranged on the machine body between the control handle and the lifting mechanism. Compared with the prior art, the non-contact type ultrasonic flaw-detecting machine for the hollow car axle is used for detecting the hollow car axle by using a non-contact ultrasound wave pulse reflection method; the detection control system is used for controlling the feeding mechanism to drive a flaw-detecting rod to move forth and back along with the inner surface of the hollow car axle; a probe carrier at one end of the flaw-detecting rod rotates under the driving of a rotation motor, so that a probe on the probe carrier is capable of automatically detecting the hollow axel in all directions and accurately detecting transverse flaws and vertical flaws on the inner surface and the outer surface of the hollow car axel and material defects in the hollow car axel.

Description

technical field [0001] The invention relates to an axle flaw detector, in particular to a non-contact hollow axle ultrasonic flaw detector, which belongs to the technical field of metal ultrasonic flaw detection equipment. Background technique [0002] In the context of my country's rapid railway speed increase, it is especially necessary to overhaul high-speed railway EMUs that have reached the maintenance mileage to ensure operational safety. During overhaul, it is necessary to carry out ultrasonic flaw detection inspection on the axle. Existing ultrasonic flaw detection equipment can only detect solid axles. However, the axles used in high-speed railway EMUs are basically hollow axles, and the probe needs to be inserted into the interior of the axle for comprehensive inspection. Therefore, it is urgent to provide an improved hollow axle ultrasonic flaw detector to overcome the above defects. [0003] After searching, it was found that the Chinese utility model patent ap...

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Problems solved by technology

[0003] After searching, it was found that the Chinese utility model patent application number is 201120317694.3, which discloses a high-efficiency hollow axle ultrasonic flaw detector. In its structure, the probe rod is also used to detect the hollow shaft. It is a contact structure, which rubs against each other during the flaw detection process, and the wear of the probe carrier is serious. At the same time, the lifting mechanism of this structure adopts mechanical lever lifting. The time is long, which greatly affects the efficiency of flaw detection of hollow axles

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