Precise forming powder in type of top tightened frame mount

Abstract

An accurate powder compacting machine with prestressed frame is composed of enclosed frame-type main body, main cylinder assembly and bottom cylinder assembly. Said main cylinder assembly installed at upper part of main body consists of main cylinder, and nested cylinder fixed to the top of piston rod of main cylinder. Its advantages are less tensional deformation, high rigidity, and high machining accuracy. It is suitable for shaping the workpiece with complex shape and central hole.

Description

technical field [0001] The invention relates to a powder pressing equipment, in particular to a pre-tightening frame type precision forming powder pressing machine. Background technique [0002] Powder metallurgy is the technology of manufacturing metal powder and using metal powder (including mixed non-metallic powder) as raw material, using the forming-sintering method to manufacture materials and products; powder press is powder pressing and forming equipment, used to mix metal powder (or mixed with non-metallic powder) Metal powder) pressed into the required parts products. At present, most domestic powder presses adopt a three-beam and four-column structure. This structure has relatively poor rigidity, and it is easy to generate tensile stress during the production process to cause deformation of the equipment, especially when the pressing tonnage is slightly larger. Large deformation, the machining accuracy cannot be guaranteed, so it cannot...

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Problems solved by technology

At present, most domestic powder presses adopt a three-beam and four-column structure. This structure has relatively poor rigidity, and it is easy to generate tensile stress during the production process to cause deformation of the equipment, especially when the pressing tonnage is slightly larger. Large deformation, the machining accuracy cannot be guaranteed, so it cannot meet the process requirements for manufacturing high-precision parts; in order to overcome the shortcomings of the powder press with this structure, there are also powder presses with a frame structure in the prior art , but this kind of powder press is simply refitted with a general-purpose frame-type hydraulic press. An oil cylinder is installed on the upper and lower sides of the frame to press the middle mold to form the powder in it. This modified powder press It does not take into account the pressing characteristics of powder parts. Its pressing mode is the same as that of ordinary hydraulic presses. It can only be better applied to single-layer molds, which are used to form powder parts with relatively simple shapes, and for multi-table powders with more complex shapes. Parts, such as parts with two upper and lower three tables, use a single-layer mold to fill powder according to the final forming position of the part, and cannot produce different powder loading and pressure according to the actual loose packing ratio and different structures of each part. The density of the pressed parts is not uniform enough, the performance is poor, and it cannot meet the requirements of actual production

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