Compression molding die for side surfaces of equal-density slender pipe fittings

Abstract

A side face synchronous isobaric compression forming principle is adopted, 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, and side face pressing is conducted on six side face sliding pressing blocks synchronously through side face pressing pieces. Under the action of the same side pressure, 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 provided by the invention. Experiments prove that the defects in the prior art can be ideally overcome. The side face pressing forming die for the equal-density slender pipe fitting is scientific and ingenious in design principle, simple in structure and convenient and fast to press, and the problem that the equal-density slender pipe fitting cannot be pressed through an existing pressing method is solved.

Description

Technical field: [0001] The present invention relates to a powder press molding technique tube press, and particularly to the elongated tubular member mold powder. Background technique: [0002] Pressing the powder tube is a hydraulic molding machine, press mold molding process in a specific repression powdery raw material, however, conventional pressing methods are commonly moved vertically by the hydraulic press and the mold tube, the tube tubular body mandrel and a die composed of mold press fit program. In this embodiment, the upper mold and the outer diameter of the tubular body of the tube to be pressed identical, the outer diameter of the inner diameter of the tube and the lower mold to be pressed tubular body, same as the inner diameter of the die mandrel with the tube to be pressed, which typical embodiment of the tube pressing member can press the tube of an aspect ratio of less than 3, the tube for aspect ratio greater than 3, the density of the wall of the tubular bod...

AI Technical Summary

Problems solved by technology

In this scheme, the inner and outer diameters of the tubular upper die and the pipe to be pressed are the same, the inner diameter of the lower tubular die is the same as the outer diameter of the pipe to be pressed, and the diameter of the mandrel shaft is the same as the inner diameter of the pipe to be pressed. A typical pipe body 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 greater the density difference, 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 used for scientific research instruments and equipment in many fields such as aerospace, military industry, machinery, and medicine. The key parts of special equipment, especially the slender tube powder pressed parts with an aspect ratio greater than 5, cannot be achieved by conventional pressing in the overall industry.

Existing technical solutions cannot meet product design requirements

Images