Isostatic pressing soft die sleeve weight-limiting isovolumetric powder filling process and device

A technology of isostatic pressing and soft moulding, applied in the field of static pressing, can solve the problems of insufficient roundness, cylindricity, and inability to control the size and control of the green compact.

Pending Publication Date: 2020-10-23
厦门金鹭硬质合金有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the use of this method, it is easily affected by the properties of the powder, and the size of the green compact cannot be controlled
It is impossible to control the feeding weight during the feeding process, and this method alone is not enough to improve the roundness and cylindricity of the green compact

Method used

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  • Isostatic pressing soft die sleeve weight-limiting isovolumetric powder filling process and device
  • Isostatic pressing soft die sleeve weight-limiting isovolumetric powder filling process and device

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Embodiment

[0033] A kind of isostatic pressing soft mold sleeve weight-limiting equal-capacity powder filling process of the present invention comprises the following steps:

[0034] A. Use a weighing device to fill a certain weight of powder into the mold sleeve. The certain weight refers to weighing the total weight of the powder according to the preset multi-stage feeding mode to weigh the weight corresponding to one of the required powders, and each time The weight of the powder required for each segment is the same;

[0035] B. The powder of a certain weight is gradually filled into the mold sleeve in a spiral manner, so that the powder in the mold sleeve gradually increases from bottom to top; in the process of increasing the powder material, a vibrating device is used to shake the powder in the mold sleeve. The material is vibrated synchronously; until a certain weight of powder is filled;

[0036] C. Use a distance measuring device to measure the powder filling height of the cer...

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Abstract

The invention discloses an isostatic pressing soft die sleeve weight-limiting isovolumetric powder filling process and device. The process adopts the cooperation of spiral powder filling and synchronous rapping, adopts a multi-section feeding mode, and realizes the weight-limiting isovolumetric powder filling of hard alloy isostatic pressing powder through the real-time monitoring of the powder density and the variable-frequency ultrasonic compaction. According to the process, the powder density uniformity of all positions in a die sleeve in the powder loading process can be improved, the diameter difference of a final pressed blank at different positions is reduced, the roundness and cylindricity of the pressed blank are improved, and the casting yield and the size controllability of a rod blank are improved.

Description

technical field [0001] The invention relates to the technical field of isostatic pressing molding of cemented carbide powder sintered materials, in particular to an isostatic pressing soft mold cover weight-limiting equal capacity powder process and a device thereof. Background technique [0002] At present, the powder filling method of various cemented carbide manufacturers in the isostatic pressing molding process is mostly one-time filling supplemented by manual beating: a certain weight of powder raw materials is weighed manually and sent to the mold sleeve through the hopper, and the mold sleeve is manually beaten. Promote the powder in the die set to reach the set height. Through this method, the weight of each feeding and the final powder filling height can be well controlled. However, the uniformity of powder density distribution in the mold sleeve is greatly affected by manual operation, resulting in large differences in the roundness and straightness of the green c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/00B22F3/04B22F3/093
CPCB22F3/004B22F3/04B22F3/093B22F2999/00B22F2203/15B22F2203/03
Inventor 陈成艺欧培山余涌张志强汪一凡
Owner 厦门金鹭硬质合金有限公司
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