阅读说明：本技术 基于激光加工多孔微孔复合节流空气轴承新型制造方法 (Novel manufacturing method of porous micropore composite throttling air bearing based on laser processing ) 是由 冯凯 王思婧 李文俊 于 2019-10-14 设计创作，主要内容包括：本发明涉及基于激光加工多孔微孔复合节流空气轴承新型制造方法。一种新型多孔质轴承中多孔质材料制造方法,该制造方法同时利用了3D打印和飞秒激光加工技术,先利用3D打印层层铺粉技术对多孔质材料整体制造,保证多孔质材料具有符合工作条件的渗透率同时表面渗透率几乎为零,再利用飞秒激光加工技术在轴承表面打微孔,并且通过控制激光的位置和频率使轴承表面微孔面积分布符合轴承承载性能最优情况。(The invention relates to a novel manufacturing method of a porous and microporous composite throttling air bearing based on laser processing. A manufacturing method of a porous material in a novel porous bearing simultaneously utilizes 3D printing and femtosecond laser processing technologies, firstly utilizes the 3D printing layer-by-layer powder laying technology to integrally manufacture the porous material, ensures that the porous material has permeability meeting working conditions and surface permeability is almost zero, then utilizes the femtosecond laser processing technology to punch micropores on the surface of the bearing, and controls the position and frequency of laser to ensure that the micropore area distribution on the surface of the bearing meets the optimal condition of bearing performance of the bearing.)

1. A method for manufacturing a novel porous material in a porous bearing, which combines 3D printing and femtosecond laser processing technologies, is characterized in that: firstly, a porous material with the surface permeability almost equal to zero is integrally manufactured by using a 3D printing technology, the distribution of the porous permeability is controllable, and then the surface of the porous material is perforated by using a femtosecond laser processing technology, and the distribution area of micropores on the porous surface can be accurately controlled by using the laser processing technology.

2. The method for manufacturing a porous material for a novel porous bearing according to claim 1, wherein: the 3D printing layer-by-layer powder laying technology is adopted to integrally manufacture the porous material, the porous material which accords with the permeability of the porous working condition is printed in a control mode, the permeability is not limited to uniform permeability and can be in different distribution modes, and then the permeability of the printing material is controlled to be almost zero when the last layer or layers are printed.

3. The method for manufacturing a porous material for a novel porous bearing according to claim 1, wherein: after the whole porous material is manufactured, micro holes are punched on the surface of the porous material, namely the vertical surface of the part with the permeability being almost zero by using a femtosecond laser micro-processing technology.

Technical Field

The invention relates to the manufacturing industry of porous air bearings, in particular to a novel manufacturing method of a porous micropore composite throttling air bearing, which combines the technologies of 3D printing and femtosecond laser micropore punching.

Background

Although the porous aerostatic bearing is widely applied to the fields of aerospace, measuring equipment, precision machinery, optical instrument manufacturing and the like due to the advantages of relatively simple structure, small friction loss and the like, the porous aerostatic bearing also has the defects of weak bearing capacity, relatively small stable range, relatively large noise and the like. The porous material has large air volume and volume due to the structural particularity, the large air volume easily causes air hammer phenomenon and has great influence on the performance of the bearing, if the porous aerostatic bearing surface has micropore distribution, namely, the throttling effect is generated on the bearing surface, the bearing obtains high bearing capacity and rigidity, and simultaneously has large working stability range and low noise working capacity. By controlling the area distribution of the micropores, the bearing clearance can be enabled to realize more uniform high pressure. The femtosecond laser micromachining technology has little influence on the periphery of the material, can accurately realize micropore machining, and can control the distribution and the size of micropores by controlling the position and the power of laser. The bearing performance can be greatly improved by carrying out micropore processing on the porous surface by utilizing the bearing. The 3D printing technology is widely used in the field of industrial manufacturing as the most popular rapid prototyping technology in recent years. The method has the advantages of shortening the manufacturing period of the product, reducing the manufacturing cost, flexibly controlling the manufacturing structure of the product and the like. When the porous structure is applied to the porous manufacturing process of the aerostatic bearing, the distribution of the porous structure can be completely controlled, the manufacturing efficiency is greatly improved, and the manufacturing cost is reduced.

Disclosure of Invention

Aiming at the defects of a porous material structure and a processing method in a common aerostatic bearing, the invention adopts a 3D printing layer-by-layer powder laying technology, efficiently, conveniently and controllably manufactures the porous material with the surface permeability of almost zero, simultaneously manufactures the porous material with different permeability distributions according to engineering requirements, and precisely, stably and controllably punches micropores at the position with the porous surface permeability of almost zero by a femtosecond laser micro-processing technology, thereby realizing the improvement of the bearing capacity, stability and low-noise working capacity of the bearing.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

1. in order to save the manufacturing cost and improve the manufacturing efficiency, the prior manufacturing method of manufacturing a porous material by sintering powder at high temperature and compacting the porous surface by a roller is changed, and the 3D printing layer-by-layer powder laying technology is adopted to manufacture the porous material with the surface permeability of almost zero, and the distribution of the porous permeability is controllable.

2. In order to reduce or even eliminate the air hammer phenomenon of the porous bearing, a femtosecond laser micro-machining technology is adopted to punch pores, namely throttle holes on the porous surface.

3. In order to provide a more uniform and stable high pressure in the porous bearing gap, the distribution of the area of the micropores needs to be controllable. The femtosecond laser micromachining technology is adopted, and the size and position distribution of micropores are completely controllable by controlling the position and power of laser, so that the bearing performance is optimal.

The beneficial results of the invention are: the 3D printing technology can be used for replacing the conventional sintering powder in a more controllable, efficient and cost-saving manner, the porous manufacturing method of the roller compacted surface is used, and meanwhile, the femtosecond laser micromachining technology is used for precisely and controllably drilling micropores on the porous surface, so that the distribution area of the micropores is controlled, and the optimization of the performance of the bearing is realized.

The invention will be further explained with reference to the drawings.

Drawings

FIGS. 1 and 2 are schematic views of a multi-hole micro-porous composite throttling thrust and radial air bearing constructed according to the present invention;

FIG. 3 is a schematic structural diagram of a porous-micropore composite throttling air bearing with a porous material permeability gradually changing from bottom to top, manufactured by the present invention;

Detailed Description

In fig. 1 and 2, 1 and 2 are both integrally manufactured by a 3D printing layer-by-layer powder laying technology, wherein 1 has a permeability which is consistent with the working performance of the hydrostatic bearing, and 2 has a permeability which is almost zero. After the 1 and 2 integral printing is finished, micro holes are drilled on the 2 material vertical to the surface of the material through a femtosecond laser micro-machining technology, and the distribution and the size of the micro holes can be controlled through the position and the power of laser so as to obtain the optimal bearing performance.

In fig. 3, 1 and 2 are both integrally manufactured by a 3D printing layer-by-layer powder laying technology, wherein the permeability of 1 gradually changes from the lower layer to the upper layer, and the permeability of 2 is almost zero. After the 1 and 2 integral printing is finished, micro holes are drilled on the 2 material vertical to the surface of the material through a femtosecond laser micro-machining technology, and the distribution and the size of the micro holes can be controlled through the position and the power of laser so as to obtain the optimal bearing performance.

The present invention is not limited to the above-described embodiments, and other embodiments similar to or the same as the above-described embodiments of the present invention are also within the scope of the present invention.