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The feature of material rolling in relates to the frictional coefficient and diameter of feeding roller.
When the thickness of material layer A gets larged, the anglecertainly will be enlarged.
Acknowledgements Fund origin of this project: The project issued by the funds of national Agricultural science and technology achievement transformation (2009GB2A400054), The project financially aided by the funds to guide and encourage the science and technological creativeness of Inner Mongolia Autonomous Region.
Reference [1] Dejun Dong, Haixia Chen, Yunfeng Wei: Journal of Agricultural Mechanization Research, 2006(5): p.42-43.
In Chinese [5] Lin Li, Xiufang Yan, Hongwei Cui, et al: Journal of Rural-Pastural Area Mechanization, 2010, (6): p.16-20.

State Key Laboratory o f Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, China, 430074; 2 .
[14] Cui ZuoXing, Shao ZhongCai, Liu ZhiYuan ,et al., Chinese Journal of Materials Research. 2009 23(2):193-198
[15] He Jian; Cai QiZhou, Luo HaiHe, et al., Rare Metal Materials and Engineering. 2009 38(5):794-798
[19] XIONG Ren-zhang, SHENG Lei, YANG Sheng-rong, et al., Ordnance Material Science and Engineering. 2002 25(3): 17-18
[20] Zheng HongYe, Wang YongKang, cao li, et al., Journal of Zhejiang University (Engineering Science). 2005 5(39): 742-745

Considering the dirrerent factors,including materials of blanking die, the thickness of raw material and difficulty degree of machining, and decide the range of punch radius is R/t=0.2～0.4 and the effectiveness of punch blade machining will be sure in this scope.
Singh, et al: Journal of Materials Processing Technology, Vol. 102 (2000), p.249-256 [2]S.P.
Lin: Journal of Materials Processing Technology, Vol. 194 (2007), p. 126-133 [3]L.
S and R.Zamora: Joumal of Materials Processing Technology, Vol. 118 (2001), p.371-376
Wang: Mechanical Science and Technology, Vol. 25 (2006) NO. 8, p. 891-895

As modern science and technology continue to develop, the various methods have appeared to improve the life of cutter.
For instance suing the new type of materials, the ceramic material and cubic boron nitride, to make the cutter, a lot of difficult problem ware solved using the methods in the machining process, but they are far from ready to be used; Another example the coating technology using the sulfurizing of low temperatures by electrolyze method, though the method can improve the life of cutter, the required equipment is costly, the manufacture cost is too high, the environmental pollution of work is worse.
Base on the principle of metal physics, in metallic material the free electron has inherent magnetic (basic magnet, also magnetic domain).
Journal of Changchun University, Vol. 13 (2003), p5-7
Journal of the institution of engineers, Vol. 54(1974), p241-246.

Rogulska, 2006] Many years ago, price of mineral oil are as low as compared to the bio-based materials.
This work that to the discovery of the polyurethanes was performed in order to synthesized novel materials that were not covered by the polyamide patents of nylon materials, held by Carothers at E.I. du Pont de Nemours & Co (fig.2 [P.H.
In order to achieve this goal, observation of surfaces were then carefully characterized by X-ray diffraction (XR-D) and transmission electron microscopy (TEM) Experimental Materials.
Materials used in this study were: polyol based on palm oil (patent application no.
[7] Chang, J.H. and Park, D.K. 2001, Journal of Polymer Science: Part B: Polymer Physics 39: 2581–2588 [8] Fornes, T.D. and Paul, D.R. 2003.

[4] Friction welding finds widespread industrial use as a mass-production process for the joining of similar and dissimilar materials. [5,6,7,8,9,10], analysed Friction welding can be used to join metals of widely differing thermal and mechanical properties.
According to ANOVA standard the materials were prepared (12mm diameter, 100mm length) and subjected to friction welding.
The parameters for friction welding the materials were identified through RSM based on the values which are high and low in values of forging pressure/time.
Murti K.G.K., [2] Sundaresan SParameter., optimization in friction welding dissimilar materials, Met.
Technol. 1495–1501.( 2004) [8] Mumin Sahin, , ‘Joining with friction welding of high-speed steel and medium-carbon steel, Journal of Materials Processing Technology 202–210. (2005) [9] Sketchley P.D., Threadgill P.L., and Wright I.G., “Rotary friction welding of an Fe3Al based ODS alloy Original Research Article” Materials Science and Engineering:A 2002 329–331 pp756-762

Li d Laboratory of Science and Technology on Advanced High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, P.O.
Rare Metal materials and Engineering, 2017, 46(4): 912-916
Materials Science and Engineering A, 2004, 386(1-2): 129-139
Materials Science Forum, 2013, 747-748:535-539
Materials Science and Engineering, 1997, A237: 35-42.

APC-841 (provided by APC International, Ltd.) and brass are selected as the piezoelectric and metal material, respectively.
Acknowledgement Authors would like to acknowledge funding of the National Natural Science Foundation of China (Grant No. 51107111) and the Office of Naval Research (Grant No.
Uchino: Design of Translation Rotary Ultrasonic Motor with Slanted Piezoelectric Ceramics, Japanese Journal of Applied Physics, vol. 50, p. 027301, 2011
Uchino: Analysis of longitudinal and torsional resonance vibrations of a piezoelectrically excited bar by introducing piezoelectric loss coefficients, Journal of Intelligent Material Systems and Structures, vol. 23, pp. 453-462, March 1, 2012
Uchino: Derivation of Piezoelectric Losses from Admittance Spectra, Japanese Journal of Applied Physics, vol. 48, p. 041401, 2009

The initial shape of ship hatch corner is circular, x=600mm, y=600mm, t=32mm, material is high strength steel AH36.
Journal of Marine Technology, 2005(1):8-12(In Chinese)
Journal of Qinghua University, 2006,46(8):1418-1421(In Chinese)
Journal of Shanghai Jiaotong University, 2006,40(2):339-341 (In Chinese)
Mechanical Science And Technology, 2006, 25(3):367-370(In Chinese).

Based on Mechanics of Materials, with Eq., the strain at x on the upper surface of the beam can be written as, (8) Strain uniformity Substituting Eq.(1) and Eq. into Eq., then the relationship between the strain ε and Fz can be written as, (9) For the rectangular beam with the same dimensions, the strain can be expressed as, (10) where is the strain of the rectangular beam.
Acknowledgements This work was financially supported by the National Natural Science Fund of Shaanxi Province（No.2011JM8028）, the Scientific Research Plan Projects of Shaanxi Education Department(No.11JK0952) and the Scientific Research Foundation for the Doctoral Program of Xi’an Shiyou University(No.2011BS001).
Heng, Journal of Beijing University of Aeronautics and Astronautics 11 (2006) 1369-1372.
Xiaoyi, Chinese Journal of Scientific Instrument 1 (2006) 42-44.
Guo-jun, Laser Journal 1 (2005) 26-27.