Turbocharger impeller blade outer edge defect detection tool and detection method thereof

Abstract

The invention relates to a turbocharger impeller blade outer edge defect detection tool and a detection method thereof. The detection tool comprises a detection tool body, a mounting hole is formed in the middle of the detection tool body, and a first measuring claw, a second measuring claw and a third measuring claw are arranged on the bottom side of the detection tool body. The bottom end of the first measuring claw is provided with a Z1 reference surface, and the side surface is provided with a first measuring claw molded surface and a first measuring claw molded line. The bottom end of the second measuring claw is provided with a Z2 reference surface, and the side surface is provided with a second measuring claw molded surface and a second measuring claw molded line. The bottom end of the third measuring claw is provided with a Z3 reference surface, the side surface is provided with a third measuring claw molded surface, and the outer side is provided with a third measuring claw molded line. According to the invention, the three measuring claws are arranged on the outer side of the detection tool body, and the Z reference surfaces, the measuring claw molded surfaces and the measuring claw molded lines of the three measuring claws respectively take a turbocharger impeller machining process as a reference, so that defects can be accurately and intuitively identified, and the inspection process of the defects of the outer edge of the turbocharger impeller casting blade is conveniently completed.

Description

technical field [0001] The invention relates to a testing tool for the outer edge defect of a turbocharger impeller blade and a testing method thereof, belonging to the technical field of the turbocharger impeller blade testing tool. Background technique [0002] The outer edge of the turbocharger impeller blade manufactured by the casting process has defects such as lack of flesh, pinholes, pores, and bumps. Usually, there is a machining allowance of 1 to 3 mm on the edge of the blade. If the defect is within the range of machining allowance, If the defect can be removed by machining, the defect is allowed; if the defect is larger than the machining allowance and cannot be removed by machining, the defect cannot pass. The commonly used detection method is mainly a caliper to check whether the defect is within the range of machining allowance; the biggest disadvantage of this method is that for larger defects, especially when the defect is close to or even exceeds the machin...

AI Technical Summary

Problems solved by technology

[0002] The outer edge of the turbocharger impeller blade manufactured by the casting process has defects such as lack of flesh, pinholes, pores, and bumps. Usually, there is a machining allowance of 1 to 3 mm on the edge of the blade. If the defect is within the range of machining allowance, If the defect can be removed by machining, the defect is allowed; if the defect is larger than the machining allowance, and the defect cannot be removed by machining, the defect cannot pass

The commonly used detection method is mainly a caliper to check whether the defect is within the range of machining allowance; the biggest disadvantage of this method is that for larger defects, especially when the defect is close to or even exceeds the machining allowance of the blade, it cannot be accurately detected. Judging whether the defect is out of tolerance

[0003] First of all, the caliper inspection is based on the edge of the blade for measurement and evaluation. However, due to the large fluctuations in the size of the casting, there is a large circular runout at the edge of the blade relative to the machining benchmark of the impeller, which will cause the size of the apparent defect to be smaller than the machining allowance when the caliper is measured. However, the defect of the actual impeller cannot be removed after machining; secondly, the jaws of the caliper cannot penetrate into the defect to accurately measure the size of the defect, and can only be roughly estimated by sticking to the defect, with poor accuracy and poor operability. Therefore, it is necessary to design a method based on The inspection method for turbocharger impeller machining benchmark and convenient and intuitive inspection for blade edge defects

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