Press anvil crack detection method

Abstract

The invention discloses a press holding-up hammer crack detection method which comprises the following steps: step 1, mounting an acoustic emission detection module at the front end of a press holding-up hammer, and collecting acoustic wave signals on a press working site in real time through the acoustic emission detection module; step 2, processing the sound wave signal acquired in the step 1 into a signal with a proper signal-to-noise ratio and amplitude voltage by adopting a signal adjustment module to obtain an analog sound wave signal; 3, the analog sound wave signals are converted into digital sound wave signals through data acquisition equipment, and the digital sound wave signals are stored in storage equipment of a press control cabinet; 4, compiling the sound wave signal identification algorithm into an application program by adopting a hybrid programming mode, and integrating the application program into a press control system; and 5, an application program is called through a man-machine interaction screen of a press control cabinet, the digital sound wave signals are preprocessed, anvil crack sound wave signals are recognized, if the anvil crack sound wave signals are recognized, an alarm is output to a press control system, and the press is controlled to stop heating and relieve pressure.

Description

technical field [0001] The invention belongs to the technical field of nondestructive detection of cracks, and in particular relates to a crack detection method of an anvil of a press. Background technique [0002] The top hammer is the key part of the six-sided top press. The main material is tungsten drill series cemented carbide. During use, the top hammer is subjected to huge tensile stress, compressive stress, shear stress and alternating heat in the temperature field. Stress, in a state of supercritical stress. Cemented carbide itself is a brittle material, and external factors such as fatigue damage, process defects, improper alignment of the anvil, and improper placement of synthetic blocks will all cause the anvil to break. If the operator fails to detect the rupture of the top hammer in time and performs the pressure relief and heat-stop operation, the pressure in the high-pressure chamber will leak, which will cause debris and composite blocks to splash, "blastin...

AI Technical Summary

Problems solved by technology

Cemented carbide itself is a brittle material, and external factors such as fatigue damage, process defects, improper calibration of the anvil, and improper placement of the composite block will all cause the anvil to break

If the operator fails to detect the rupture of the top hammer in time and performs the pressure relief and heat-stop operation, the pressure in the high-pressure chamber will leak, which will cause debris and composite blocks to splash, "blasting", damage to the top hammer and other hazards, resulting in casualties Hidden dangers and economic losses, therefore, how to judge anvil cracks is one of the key technical issues that need to be solved urgently

[0003] At present, the detection of cracks in the top hammer mainly relies on empirical judgment. The commonly used methods are: (1) Visual inspection of the hammer. Judging by hand feeling whether there are cracks; (2) Judging by hearing. During the diamond synthesis process, experienced operators can judge whether the anvil is broken by listening to the sound similar to "saw blade breaking". However, due to on-site noise interference, and Influenced by personal factors such as attention, voice recognition is difficult and the effect is not good; (3) High-speed cameras are used for image acquisition, and then image recognition is also given up due to site conditions; The heating current will generate an unpredictable alternating magnetic field. It is difficult to predict the impact of the alternating magnetic field on the detection system by using detection methods such as eddy current detection that need to sense changes in the magnetic field.

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