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Ceramic scraper

A scraper and ceramic technology, which is applied in the field of rapid prototyping, can solve the problems of uneven surface of the forming layer, uneven thickness of the melting layer, and reduced processing accuracy, and achieve the effect of firm bonding, light weight, and improved processing accuracy

Active Publication Date: 2015-05-27
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Coupled with the low gravity of the powder itself, it is easily affected by the magnetic force generated by ferromagnetism
The movement of the scraper holder with the powder and the falling off of the powder adsorbed on the scraper will cause the unevenness of the powder coating, which will make the thickness of the molten layer uneven during the subsequent laser melting process, resulting in uneven surface of the forming layer and reducing the processing accuracy

Method used

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Embodiment Construction

[0047] The present embodiment is that the ceramic scraper is placed on the semiconductor laser microchannel heat sink ( Figure 11 ) application in the manufacturing process.

[0048] In this embodiment, the inner channel of the semiconductor laser microchannel heat sink is an open circulation channel, and the wall thickness between adjacent channels is only 0.2mm. The material used to process the semiconductor laser microchannel heat sink is nickel alloy powder. Since the nickel alloy powder is magnetic, it is difficult to spread the powder when using a traditional steel scraper for processing ( Figure 10 ). Mainly because the traditional steel scraper has ferromagnetism, it will magnetize the nickel alloy powder. It is light and easy to adsorb on the surface of the scraper. During the movement of the scraper, the powder adsorbed on the surface of the scraper will fall off, making the powder layer that has been scraped flat become uneven. In the subsequent laser melting p...

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Abstract

The invention relates to a ceramic scraper, which is used for powder spreading in the process of laser rapid prototyping. Both ends of an edge are provided with rounded corners, the upper part of the scraper is provided with screw holes, and thereby the ceramic scraper can be conveniently fixed on a scraper holder of a powder spreader. Since a conventional steel scraper has high ferromagnetism, in the process of powder spreading, the steel scraper can attract magnetic powder because of static electricity generated by friction, the magnetized powder can be easily agglomerated, as a result, the surface of a formed layer is uneven, the machining precision of parts is decreased, and even the interruption of a modeling process is caused. Since the ceramic scraper does not have ferromagnetism, the problems existing in the conventional scraper can be solved perfectly, the evenness of a powder layer is increased, and prototyping precision is improved. Moreover, since the rigidity of the ceramic scraper is high, the ceramic scraper has high wear resistance, furthermore, since the edge of the scraper is added with the rounded corners, friction force applied on the scraper can be further decreased, and therefore the service life of the scraper made of ceramic can be effectively prolonged. The ceramic scraper also has the advantages of simplicity in production, low machining cost, convenience in use and the like.

Description

technical field [0001] The invention relates to a ceramic scraper used in the rapid prototyping process, which is mainly used in the powder spreading process in the rapid prototyping process, and is used to solve the problem that the magnetic powder is adsorbed on the spatula to reduce the forming accuracy when the traditional steel spatula is spreading the magnetic powder. The problem, thereby improving the precision of the formed parts, and at the same time improving the service life of the scraper, belongs to the field of rapid prototyping. Background technique [0002] Today's market environment is undergoing tremendous changes. On the one hand, consumers' needs are increasingly personalized and diversified; on the other hand, product manufacturers are all focusing on the fierce competition in the global market. Faced with such a rapidly changing and unpredictable buyer's market, manufacturers must not only quickly design products that meet people's consumption needs, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/00B22F10/28B22F12/67
Inventor 张冬云刘臻高志鹏董东东曹玄杨
Owner BEIJING UNIV OF TECH
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