Method for automatically detecting plugging of injector steel needles based on air pressure

Abstract

The invention provides a method for automatically detecting the plugging of injector steel needles based on air pressure. The method comprises the following steps of: connecting a tool strip from the bottom of a needle seat to a pressure pump, and arranging an air pressure valve on a pump air path of the pressure pump; acquiring trigger and control signals, which are synchronous with a productionprocess, of the pressure pump by using a computer, starting the pressure pump by using external trigger and control signals to pump air from the bottom of the needle seat to the steel needles, opening the air pressure valve simultaneously, and transmitting air pressure values of all the steel needles which are detected by a pressure gauge when the air is started to be pumped and after the air is pumped for 0.5 seconds to the computer for detection; and judging whether a steel product is a qualified product or a waste product through the computed change rate of the air pressure generated when the air is pumped within 0.5 seconds, and eliminating the waste product from a specified material outlet through the external trigger and control signals. By the method, the plugging of the steel needles can be detected at high accuracy and high speed, and the yield of the product can be effectively ensured.

Description

technical field [0001] The invention relates to the technical field of syringe steel needle detection, in particular to a method for automatically detecting whether the syringe steel needle is blocked by using the air pressure principle at the production site of the syringe steel needle. Background technique [0002] In the production workshop of syringe steel needles in assembly line operation, it is necessary to conduct online detection of whether the steel needles are clogged (needle blockage). In the prior art, the on-line detection of steel needle clogging relies on manual detection. First, the steel needle is fixed on the needle row, then immersed in silicone oil, and whether the steel needle is bubbling is observed by human eyes, so as to determine whether the steel needle is If there is blockage, the product is divided into qualified products (such as bubbles coming out of the needle) and unqualified products (such as no bubbles coming out of the needle) according to...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art that the detection of needle blockage of syringe steel needles and steel needles relies on manual detection, workers are prone to visual fatigue, labor intensity is high, the product qualification rate and detection quality cannot be guaranteed, and the monitoring speed is low. The present invention provides a method based on The automatic detection method of the air pressure on the needle of the syringe steel needle can greatly reduce the labor intensity of the detection of the workers, and the detection accuracy is high and the speed is fast, which can effectively ensure the qualified rate of the manufactured products

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