2023年全國碩士研究生考試考研英語一試題真題(含答案詳解+作文范文)_第1頁
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1、Spinning technology1. Spinning technology basic conceptsMetal spinning the basic principles of technology similar to the ancient pottery production technology. Spiral forming of the general axially symmetrical parts for

2、 cylindrical thing or a disc, the spinning semifinished product usually thick wall cylinder a round or sheet metal. Spinning machine the principle and structure similar to metal cutting lathes. In the lathe big draggin

3、g plate position, the design becomes a axial movement with the power of the rotary wheel frame, secure in the spin on the shelf wheel spin round can make radial motion; And the spindle of coaxial connecting a mandrel

4、(axis), spinning semifinished product set in the core mold (axis); Spin round through and set in the core mold (axis) of the blank of contact, generate friction reverse passive rotation; At the same time, and the wheel

5、 frame in axial thrust large under the action of oil cylinder, axial movement. Rotary wheel frame in axial, rotary wheel in radial force under the common function of, point by point blank surface implementation of cont

6、inuous plastic deformation. In the end the position of the top bracket lathe, the design with the same axis of the main shaft into the top hydraulic cylinder, hydraulic cylinder to set in the core mold (axis) of the bl

7、ank on end axial thrust.Spinning moulding common spinning and powerful spinning moulding two kinds. Don't change the blank thickness, change the shape of a blank spinning that ordinary spinning molding; That is bla

8、nk thickness change, and change the shape of the blank spinning that powerful spinning moulding. Powerful spinning moulding pressure great need spin, spinning machine structure in general is more complex. Powerful spin

9、ning and spinning wheel in forming mobile direction and the metal flow direction, divided into is the spin and spin. Spin round the direction of the mobile metal flow in the same direction, that is spinning; Conversely

10、, called reverse spin. The same kind of material, the spin the larger pressure molding spin. Use which kinds of spinning mode forming, according to the shape of the parts and technology requirements for sure.Spinning m

11、achine selection by spinning craft and various molding process conditions required. Spinning machine points of powerful spinning machine and ordinary spinning machine two types. Powerful spinning machine again points t

12、wo rollers and three spinning wheel. And used for special parts of spinning spinning machine, such as hot spinning machine, steel ball spinning machine, etc.China's metal spinning moulding technology development his

13、tory nearly forty years, and in the defence industry application is extensive research, the application level is high, especially in spinning production process and equipment, has been a leading domestic status. Spinni

14、ng machine design and manufacturing capability is strong.2. Spinning technology introductionWhat is called a spinning technology, also called metal spinning forming technology, through the rotation to force a point by

15、point to the line by line to the face, and in a certain direction to give certain pressure makes the metal material along the direction deformation and flow and forming a shape of the technology. Here, metal materials

16、must have plastic deformation or flow properties, spinning forming not equal plastic deformation, it is the collection plastic deformation and flow deformation complex process, especially need to point out is, What we

17、 call spinning forming technology is not a single powerful spinning and spinning common, it is a combination of both; Powerful spinning used for various tube, the cone, different form of spinning forming shell Fold the

18、 the selection of material thickness of 1.5 ~ 2.5 mm, also is the deep drawing and pressing method blocking, and in spinning machine processing forming. Because the forming process in folding round metal flow didn'

19、t happen, so the process is simple, the influence factors on the quality of the little.Split wheel thickness of the material for 2 ~ 4 mm, generally USES a cutting blocking, in the spinning wheel with spin on the mater

20、ial from the thickness of the split in half after plastic and forming. Due to its processing technology is simple, the influence factors on the quality of the little also, the most is the plane of blank itself by the

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