Pressing tool for powder magnetic core

Abstract

The present invention discloses a pressing tool for a powder magnetic core. The pressing tool comprises a mounting plate, transverse plates are arranged at the upper end and the lower end of the mounting plate, a fixing plate is arranged at the rear end of the mounting plate, sliding ways are symmetrically arranged on the front surface of the mounting plate, an upper sliding block and a lower sliding block are connected to the sliding ways in a sliding mode, an upper hydraulic cylinder is arranged on the transverse plate at the upper end, a lower hydraulic cylinder is arranged on the transverse plate at the lower end, buffering assemblies are arranged on the surfaces, opposite to the lower sliding block, of the upper sliding block, an upper die is arranged on the lower surface of the buffering assembly at the upper end, a lower die is arranged on the upper surface of the buffering assembly at the lower end, buffering mechanisms are arranged at the rear end of the upper sliding block and the rear end of the lower sliding block correspondingly, a two-way buffering hydraulic cylinder is arranged at the rear end of the mounting plate and between the two buffering mechanisms, and limiting contacts are arranged at the positions, corresponding to the buffering mechanisms, of the rear ends of the two transverse plates, so that the upper stress and the lower stress of the powder magnetic core are consistent, the internal density of the powder magnetic core is more uniform, and cracks are prevented.

Description

technical field [0001] The invention relates to the technical field of pressing powder magnetic cores, and the specific field is a pressing tool for powder magnetic cores. Background technique [0002] Nowadays, in the manufacturing process of powder magnetic core, the granulated powder with soft magnetic powder and insulating bonding material is compressed and formed to obtain a molded body. The specific molding process is between powder preparation and nitrogen kiln sintering. Connecting the previous and the next is the key process of magnetic core quality control. The main task of the molding process is to press the soft magnetic powder and the granulated powder of the insulating bonding material into the required qualified powder magnetic core blank through the pressing tool. The quality of the powder magnetic core blank directly determines the final product. Therefore, every powder magnetic core manufacturer regards the quality of powder magnetic core blanks in the mol...

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Problems solved by technology

[0004] The object of the present invention is to provide a method to solve the problem of the earliest single punching machine proposed in the above-mentioned background technology. The lower mold is fixed, and only the upper mold is moved to pressurize. Due to the inconsistency of the upper and lower forces, the density inside the powder magnetic core is inconsistent. Uniform, prone to splintering issues

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