Powder material compression molding safety equipment assisted by ultrasonic vibration

A powder material, press molding technology, applied in the direction of material molding presses, presses, manufacturing tools, etc., can solve the problems of uneven internal density distribution, inconsistent effective pressure, loss, etc., and achieve high-quality molding Preparation, increase effective pressure, reduce the effect of internal stress

Active Publication Date: 2017-08-29
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Compression is an important process path in the field of mixed energetic powder material forming and charging, but this process faces important bottlenecks in innovative development, especially in terms of density and density uniformity, internal stress homogenization, and residual stress release.
Specifically, in the process of powder material compression molding, there is inevitably internal friction between powder material particles and external friction between the particles and the mold wall (or soft mold), resulting in the pressure being gradually lost along the pressing direction, As a result, the effective pressure on the particles of energetic powder materials at different height layers and different radial positions is inconsistent, and the internal density distribution of the green compact is not uniform.

Method used

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  • Powder material compression molding safety equipment assisted by ultrasonic vibration
  • Powder material compression molding safety equipment assisted by ultrasonic vibration
  • Powder material compression molding safety equipment assisted by ultrasonic vibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 It is a schematic structural diagram of the safety equipment for pressing and molding powder materials assisted by ultrasonic vibration provided in Embodiment 1 of the present invention. Such as figure 1 As shown, the equipment includes an ultrasonic base 1 , an ultrasonic die set 2 installed on the ultrasonic base 1 , an ultrasonic punch 3 used in conjunction with the ultrasonic die set 2 , and a hydraulic press for driving the ultrasonic punch 3 .

[0030] In this example, if figure 2 As shown, the ultrasonic die set 2 includes a cover plate 21 , eyebolts 22 , a powder pressing chamber 23 , a lower die 24 , and a circulating water cooling system. The circulating water cooling system includes a water pipe 25 , a liquid inlet 251 and a liquid outlet 252 . Eyebolts 22 are provided on the cover plate 21 and the lower die 24 . The joint between the powder pressing chamber 23 and the cover plate 2, the joint between the powder pressing chamber 23 and the liquid...

Embodiment 2

[0039] Embodiment 2 provides a powder material compression molding method assisted by ultrasonic vibration, which includes the following steps.

[0040] Step (1): Place the powder material to be pressed in the ultrasonic mold sleeve, between the ultrasonic punch and the ultrasonic base.

[0041] Step (2): Start the cooling water circulation system, the cooling liquid is injected from the liquid inlet and flows out from the liquid outlet of the cooling water circulation system.

[0042] Step (2) Specifically, inject cooling liquid into the liquid inlet of the ultrasonic mold sleeve and the liquid inlet of the ultrasonic punch, so that the cooling liquid is injected from the liquid inlet of the cooling water circulation system and flows out from the liquid outlet, thereby starting the ultrasonic mold sleeve. The cooling water circulation system and the cooling water circulation system in the ultrasonic punch.

[0043] Step (3): Start the hydraulic press, and the ultrasonic punc...

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Abstract

The invention relates to the technical field of powder material pressing molding and provides a powder material pressing molding safety device under the assistance of ultrasonic vibration. The device comprises an ultrasonic base, an ultrasonic die sleeve installed on the ultrasonic base, an ultrasonic punch used in cooperation with the ultrasonic die sleeve, a hydraulic machine driving the ultrasonic punch, a first ultrasonic transducer and a transducer connecting part. By means of the technical scheme, inner friction among powder material particles and outer friction between the particles and the side wall of the ultrasonic die sleeve are lowered, the effective pressure of different layers of grains is improved, densification of powder material parts is effectively improved under existing moderate molding conditions, internal density uniformity is improved, internal stress is reduced, and therefore the grains can be molded and manufactured with high quality.

Description

technical field [0001] The invention relates to the technical field of powder material compression molding, in particular to a powder material compression molding safety device assisted by ultrasonic vibration. Background technique [0002] Compression is an important process path in the field of mixed energetic powder material forming and charging, but this process faces important bottlenecks in the development of innovation, especially in terms of density and density uniformity, internal stress homogenization and residual stress release. Specifically, in the process of powder material compression molding, there is inevitably internal friction between powder material particles and external friction between the particles and the mold wall (or soft mold), resulting in the pressure being gradually lost along the pressing direction, As a result, the effective pressure on the energetic powder material particles at different height layers and different radial positions is inconsi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B30B11/02B30B15/34
CPCB30B11/022B30B15/34
Inventor 吕珂臻韩超郑芳陈学平张锋雍炼徐程洪杨坤王辰辰吴志展蒋芝芳
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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