Talking about the three-dimensional modeling problem of standardized bearings

The standardized 3D modeling of the library and the standardized library function of the electronic board V2 can solve the three-dimensional modeling problem of the standardized bearing. Due to the characteristics of the bearing structure, it is necessary to consider the size of the three-dimensional entity in accordance with the national standard, and also consider the positional relationship between the outer ring, the inner ring, the rolling element and the cage. There are three kinds of conventional configuration methods: one is to disassemble the bearing to construct the outer ring, the inner ring, the rolling elements, the cage according to the assembly configuration, and then assemble them according to their respective relationships. This configuration method is difficult to achieve precise positioning, and the overallity is limited; the other is according to a single part configuration, this configuration is not removable, but the overall is good, there are still problems that are difficult to accurately locate; the third It is to call the existing library elements such as SolidWorks to directly transfer the bearing parts, but the size and shape of the bearing are different from the national standard. Here is a simple drawing method, which uses the combination of electronic drawing board and three-dimensional electronic drawing board, which can not only complete the configuration but also meet the national standard, and has certain practical value in the actual configuration.

Start the electronic board V2, open the standardized library, and set the standard view of the cylindrical roller bearing after setting the parameters. In order to construct the solid features, the parts of the standard view of the middle bearing must be extracted, and then the view is output to the 3D electronic board as a sketch to prepare for the feature operation. A new method of three-dimensional modeling of standard parts and common parts is carried out according to the outer ring, the roller and the inner ring sketch, and the three-dimensional modeling of the bearing is finally obtained. The operation sequence is shown in the feature tree.

In recent years, domestic CAD software has developed rapidly in China. While drawing on the advantages and advantages of foreign excellent CAD software, it has incorporated many functions, such as the establishment of a graphic library in line with the national standard, so that users can directly generate graphics by simply determining the graphical parameters. Parametric design of commonly used parts greatly enhances the ability to design complex parts; develops a universal data interface that can exchange data with software such as AutoCAD. CAD technology is moving towards intelligent, integrated, networked, standardized, parameterized, visualized and multimedia, which indicates that domestic software must be more integrated and intelligent based on the original features, only in this way can CAD The field has gained more room for development.

Nonwoven Geotextiles

Nonwoven geotextiles are made of polyester or polypropylene in random directions and punched together by needles. Geotextiles has good impermeability and resistance to deformation, which allows geotextiles be widely applied in civil projects for separation, filtration, reinforcement, protection and drainage.

Specification:

(1). 80g/m2~1000g/m2

(2). 1m~8m in roll width, the length as client's request.

(3). Color: white , black , green or at your request

Property:

(1). Good flexibility, resistant to corrosion, resistant to acids and alkali, anti-oxidation

(2). Separation, filtration, drainage, reinforcement , protection and maintentance function.

Technical data sheet of polypropylene geotextile

Technical data sheet of polyester geotextile

Gram weight	Thickness(mm)	Breaking strength(kn/m)	CBR burst strength(KN)	Elongation at break(%	Tear Strength(KN)	Sieve size O99(O35)mm
100	0.9	2.5	0.3	25-100	0.08	0.07-2.0
150	1.3	4.5	0.6	25-100	0.12	0.07-2.0
200	1.7	6.5	0.9	25-100	0.16	0.07-2.0
250	2.1	8	1.2	25-100	0.2	0.07-2.0
300	2.4	9.5	1.5	25-100	0.24	0.07-2.0
350	2.7	11	1.8	25-100	0.28	0.07-2.0
400	3	12.5	2.1	25-100	0.33	0.07-2.0
450	3.3	14	2.4	25-100	0.38	0.07-2.0
500	3.6	16	2.7	25-100	0.42	0.07-2.0
600	4.1	19	3.2	25-100	0.46	0.07-2.0
800	5	25	4	25-100	0.6	0.07-2.0