Crankshaft magnetic detector

Abstract

The invention provides a crankshaft magnetic detector comprising a main body and a control cabinet, wherein a head frame chunk and a tail frame chunk are arranged on a guide rail of a main body frame assembly to clamp an electrified circumferential magnetizing device, a left head-frame chunk base is fixed, the position of a right tail-frame chunk base can be moved and locked according to the length of a crankshaft, an air cylinder which is used for clamping the crankshaft is arranged behind the tail frame chunk, conducting plates which are electrified after clamping the crankshaft are respectively arranged on shafts of the head frame chunk and the tail frame chunk, and the left and right sides of the frame assembly are respectively provided with an electric case and a device pneumatic control case. The crankshaft magnetic detector is characterized in that a multiturn longitudinal magnetizing coil which can longitudinally extend is arranged between the head frame chunk and the tail frame chunk, and a workpiece rotating device is arranged on the chunk conducting plates. The crank magnetic detector can complete longitudinal magnetization or complex magnetization of the whole length of the crankshaft with a length between 800mm and 1500mm once, sufficiently and evenly magnetizes the parts of the crankshaft, is safe and reliable and has low failure rate.

Description

technical field [0001] The invention relates to a crankshaft magnetic detector, which is used for magnetic particle flaw detection of a diesel engine crankshaft with a length of ≤1500mm. Background technique [0002] The diesel engine is the heart of vehicles and power equipment such as automobiles, tractors, and ships, and the crankshaft is an important part of the diesel engine. When the diesel engine is working, the crankshaft rotates at a high speed to transmit power. If there are defects such as cracks on the crankshaft due to material quality and processing, the crankshaft may break and the machine may fail during use, endangering personal safety and causing economic losses. Therefore, it must be inspected for flaw detection during the manufacturing process of the crankshaft. From the perspective of fracture mechanics, the risk of surface defects is much higher than that of internal defects of the same size, so the magnetic particle inspection equipment suitable for t...

AI Technical Summary

Problems solved by technology

However, due to the fact that the high-current on-off switch is easily deformed due to heat when it is energized, the opening and closing of the coil is easily arc-welded or cannot be turned on, and the failure rate of the equipment is very high. This kind of device is rarely used.

[0007] 3. Spatial special-shaped coil, which is a patent of German KARL DEUTSCH company, but the company only uses this kind of coil in UH ​​series magnetic detectors for detecting small workpieces. Whether it can be used for large crankshaft parts is questionable.

Images