The invention discloses a
magnetic flux leakage defection
machine of an oil sleeve. The
magnetic flux leakage defection
machine comprises a control cabinet, a computer, a
production line detection
system and a marking
machine, wherein the control cabinet is respectively connected with the computer, the
production line detection
system and the marking machine through a
signal line; and the
production line detection
system comprises a plurality of clamping driving devices, a vertical defect detection device and a transverse defect detection device. Electric signals of sleeve defects, detected by an
infrared monitoring sensor on the production line detection system, are processed by a
signal amplification circuit and a
noise cancelling circuit and are divided into two paths; in one path, defect parts are accurately sprayed with marks by a
signal processing circuit through utilizing the computer to drive the marking machine; and in the other path, defect signals are mixed into a simulated signal, and defect degree is displayed on a display screen of the computer through an A / D (Analog / Digital) converting circuit. With the adoption of the technical scheme of the invention, the
magnetic flux leakage defection machine disclosed by the invention can carry out defect detection on the oil sleeve in rotation process on a production line, has small
power consumption amount, is energy-saving and environment-friendly and has high detection sensitivity; and a probe does not need to be replaced when sleeves with different calibers are detected, the detection efficiency is high, the
hooping of the oil sleeve can be smoothly avoided, the probe can be automatically reset after being detected, the service life is long, the cost is reduced, and the detection quality and the detection effect are improved.