Magnetorheological vibration reduction system based on shearing work mode for cylindrical turning vibrations

Abstract

The invention relates to a magnetorheological vibration reduction system based on a shearing work mode for cylindrical turning vibrations. An upper spacing groove is adjustably connected below a connecting plate inside a sliding magnetic pole assembly; two upper magnetic poles are fixedly connected below the upper spacing groove through upper partition plates; a lower spacing groove inside a fixed magnetic pole assembly is fixedly connected with a lower box body in a positioning way; the lower spacing groove is internally connected with a middle lower magnetic pole in an interference fit way;the inner side surface of the box body is fixedly connected with two side lower magnetic poles; magnet exciting coils are transversely wound in square grooves positioned on the outer surfaces of the side lower magnetic poles and the middle lower magnetic pole, and magnetorheological fluids are injected between the upper magnetic poles and the lower magnetic poles; an acceleration transducer is arranged on the front end of a lathe cross slide and sequentially connected with a charge amplifier, a computer and a program-controlled DC power supply through cables; and the program-controlled DC power supply is connected with the magnet exciting coils. The magnetorheological vibration reduction system has important application values to effectively enhancing the processing quality and the production efficiency of cylindrical turning, especially the cylindrical turning of slender axle parts, prolonging the lives of cutters and reducing turning noises.

Description

technical field [0001] The invention relates to a vibration damping system for turning, in particular to a magneto-rheological vibration damping system for outer circle turning. Background technique [0002] Cutting chatter is a dynamic instability phenomenon in the closed-loop cutting system of machine tools. It occurs between the cutting tool and the workpiece, and is an important factor restricting the improvement of the processing level of modern manufacturing. In turning processing, chattering is easy to occur when turning shaft parts with relatively large length and diameter, such as crankshafts and camshafts in engines, etc. How to improve the processing quality and production efficiency of such parts and reduce the processing time The flutter that appears in the machine has become one of the important issues to be solved urgently in the machinery manufacturing industry. [0003] According to the chatter prevention theory, adding a vibration damping device in the mac...

AI Technical Summary

Problems solved by technology

In 2006, Mei Deqing of Zhejiang University and others applied for an invention patent that introduced the magnetorheological effect into boring processing, and developed a self-suppressing vibration intelligent boring bar system based on magnetorheological fluid; for turning processing, in 2007, Xu Ping et al. Metal foam is added to the conventional magnetorheological fluid to develop a magnetorheological-foam metal damper that can be used to suppress chatter during cutting and turning. However, for the slender shaft that has a large amount of processing and is prone to chatter external turning chatter of such parts, the damper is powerless

Images