Isodensity slender pipe fitting side face compression molding equipment and compression molding method thereof

Abstract

The invention relates to side surface compression molding equipment and a compression molding method for an equal-density powder slender pipe fitting, which can be used for compressing an equal-density slender pipe body with a large length-diameter ratio by using powder. According to the side face synchronous isobaric compression forming principle, the size of a powder containing cavity is determined according to the requirement of a long and thin pipe body to be pressed for the compression ratio of powder, a main oil cylinder synchronously conducts side face pressing on six side face sliding pressing blocks through an upper punching head, and due to the fact that the pipe body and the wall are small in thickness size, under the effect of the same side face pressure, the size of the pipe body is small. The tube wall powder compression density of the slender tube body is equal, and the length-diameter ratio of the slender tube body to be pressed is not limited theoretically according to the forming scheme. According to the scheme, the defects in the prior art can be ideally overcome. The side face pressing forming equipment for the equal-density long and thin pipe fitting is scientific and ingenious in design principle, the forming mold is simple in structure, pressing is convenient and fast, and the problem that the equal-density long and thin pipe fitting cannot be obtained through an existing pressing method is solved.

Description

Technical field: [0001] The invention relates to a press-forming equipment and a press-forming method for powder pressed pipe fittings. Background technique: [0002] Powder pressed pipe fittings are formed by pressing powdery raw materials with a hydraulic molding machine and a pressing die according to a specific molding process. However, the existing pressing methods are usually hydraulic presses that move up and down. The pipe body mold composed of the die and the mold mandrel shaft cooperates with the pressing scheme. In this scheme, the inner and outer diameters of the tubular upper die and the pipe to be pressed are the same, and the inner diameter of the tubular lower die is the same as the outer diameter of the pipe to be pressed. This typical pressing scheme can only press pipe fittings with an aspect ratio of less than 3. For pipe fittings with an aspect ratio greater than 3, the wall density of the pipe body will have a large difference. The bigger it is, the co...

AI Technical Summary

Problems solved by technology

[0002] Powder pressed pipe fittings are formed by pressing powdery raw materials with a hydraulic molding machine and a pressing die according to a specific molding process. However, the existing pressing methods are usually hydraulic presses that move up and down. The pipe body mold composed of the die and the mold mandrel shaft cooperates with the pressing scheme. In this scheme, the inner and outer diameters of the tubular upper die and the pipe to be pressed are the same, and the inner diameter of the tubular lower die is the same as the outer diameter of the pipe to be pressed. This typical pressing scheme can only press pipe fittings with an aspect ratio of less than 3. For pipe fittings with an aspect ratio greater than 3, the wall density of the pipe body will have a large difference. The bigger it is, the conventional pressing method is unable to press out the slender tube body with the same density of the tube wall powder, and the slender tube body with the same density is the ideal choice for scientific research instruments and special equipment in many fields such as aerospace, military industry, machinery, and medicine. The key parts, especially the slender tube powder compacts with an aspect ratio greater than 5, cannot be achieved by conventional compaction in the overall industry.

Existing technical solutions cannot meet product design requirements

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