Shot processing device and nozzle abnormality detection method

Abstract

This technology provides the ability to detect nozzle abnormalities before they affect machining accuracy. [Solution] The shot processing device 1 comprises a hopper 3 for storing the propellant 2, a nozzle 4 for injecting the propellant 2, which has been sucked in by negative pressure, together with compressed air, a transport path for transporting the propellant 2 from the hopper 3 to the nozzle 4, a compressor 6 for supplying compressed air to the nozzle, a negative pressure gauge 7 for detecting the pressure in the transport path, and an abnormality detection unit 52 for detecting an abnormality in the nozzle 4 based on the detection result of the negative pressure gauge 7.

Claims

1. A storage section for storing the propellant, A nozzle that injects the propellant, which has been drawn in by negative pressure, together with compressed air, A transport path for transporting the propellant from the storage section to the nozzle, A compressed air supply unit that supplies the compressed air to the nozzle, A pressure gauge for detecting the pressure in the transport path, An abnormality detection unit detects an abnormality in the nozzle based on the detection result of the pressure gauge, Equipped with, Shot processing device.

2. The abnormality detection unit performs abnormality detection processing of the nozzle based on the detection result of the pressure gauge when the propellant is not supplied from the storage unit to the nozzle and compressed air is supplied from the compressed air supply unit to the nozzle. The shot processing apparatus according to claim 1.

3. The abnormality detection unit determines that there is an abnormality in the nozzle if the detection result of the pressure gauge falls outside a preset normal range. The shot processing apparatus according to claim 1.

4. The abnormality detection unit determines that the nozzle is worn if the detection result is lower than the normal range. The shot processing apparatus according to claim 3.

5. The abnormality detection unit determines that if the detection result is higher than the normal range, the nozzle has been attached incorrectly. The shot processing apparatus according to claim 3.

6. The normal range is set in accordance with the injection pressure of the nozzle. A shot processing apparatus according to any one of claims 3 to 5.

7. The normal range is set in accordance with the inner diameter of the nozzle. A shot processing apparatus according to any one of claims 3 to 5.

8. The aforementioned transport path is opened to atmospheric pressure midway through. A shot processing apparatus according to any one of claims 1 to 5.

9. A method for detecting abnormalities in the nozzle of a shot processing device that injects a propellant drawn in by negative pressure together with compressed air, A step of detecting the pressure in the transport path that transports the propellant from the storage section to the nozzle, A step of detecting an abnormality in the nozzle based on the pressure detection result, including, A method for detecting abnormalities in nozzles.

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