Permanent magnet assisted electromagnetic punching machine

Abstract

The invention discloses a permanent-magnet assisted electromagnetic punching machine which comprises a yoke, a punch and an armature, wherein the armature is fixedly connected above the punch; an upper end cover is fixedly connected above the yoke, and a lower end cover is fixedly connected below the yoke; the upper end cover, the yoke and the lower end cover form an accommodating cavity for the punch and the yoke to do reciprocating motion up and down; an upper permanent magnet is fixedly connected below the upper end cover, and a lower permanent magnet is fixedly connected above the upper end cover; and the opposite ends of the upper permanent magnet and the lower permanent magnet share the same polarity. According to the permanent-magnet assisted electromagnetic punching machine, under the condition of the same input power, the resultant force of the downward movement of the punch increases, the downward movement speed of the punch also increases, and the punching force of the punch is more than two times larger than the electromagnetic driving force, therefore, the punch has large impulse and good punching effect. The permanent-magnet assisted electromagnetic punching machine omits the spring return mechanism adopted by the existing permanent-magnet punching machine, is free from the failure caused by the clamping stagnation of the spring, is simple in structure and can work safely and reliably.

Description

technical field

[0001] The invention relates to a punching machine, in particular to a permanent magnet assisted electromagnetic punching machine using a permanent magnet and an electromagnetic device. Background technique

[0002] In the production process of electronic and information products, a large number of small and micro stamping equipment are required. Compared with mechanical and pneumatic punching machines, electromagnetic punching machines have outstanding advantages such as the shortest energy transmission route, the simplest structure, high frequency and low price. For example, the Chinese invention patent CN1715043A discloses a permanent magnet punch press, which is actually a permanent magnet assisted electromagnetic punch press, which includes a yoke 2 and a punch 31 that reciprocates up and down inside, and the punch 31 is fixedly connected to the armature 32 , also includes a magnetic drive mechanism that makes the yoke 2 and the armature 32 form a magne...

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