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涡轮机叶片的铣削英文文献和翻译(2)

时间:2017-06-02 15:01来源:毕业论文
tomeasure the deflection of theworkpiece that occurs during 5-axis high speed ball end-milling of turbine blades, two displacement sensors were installed at 5 mm from the end of the blade as shown in


tomeasure the deflection of theworkpiece that occurs during
5-axis high speed ball end-milling of turbine blades, two
displacement sensors were installed at 5 mm from the end of
the blade as shown in Fig. 2.
Fig. 3 shows the four different cutting directions used in
this experiment. Inward cutting means that cutting begins
fromthe end of theworkpiece to the supported part. Outward
cutting means that the cutting process begins from the
supported part to the end of the workpiece.
2.2. Experimental set-up
Fig. 4 shows the experimental set-up to measure the
deflection of the workpiece. The deflection of the workpiece
and machined surfaces were measured by displacement
sensors and a surface roughness tester (Talysurf Series 2,
Taylor Hobson).
2.3. Relation of cutting speed and momentum energy
Generally, the lead angle means an inclined angle in the
feed direction, and the tilt angle is the pickfeed direction. In
this paper, the lead angle and tilt angle were expressed as LD
and TT, respectively.
Momentum force is shown in Eq. (1), and momentum
energy is expressed in Eq. (2). It means that the momentum
energy increases in proportion to the square of the cutting
speed. Fig. 5 shows an extended picture of the cutting state atthe local contact surface. Actually, the cutting speed of
LDVI and TTHI is slower than any other cutter orientations.
Therefore, we can predict that themomentum energy and the最近,航空航天,汽车等行业的发展带来了新的技术挑战,不断增长的产品的复杂性和新的几何形状的模型。已被广泛用于3D高速铣削用5轴铣床雕塑曲面零件。
当涡轮叶片是由5轴铣削加工,薄,悬臂形状引起的振动,变形和扭曲。因此,工件的表面粗糙度和波度都是不好的。
    在本文中,刀具方向的影响和铅/垂直角度的5轴高速球头立铣机涡轮叶片调查,以提高几何精度和表面完整性。使用铅/倾斜角为158进行实验工件具有四个切割器的方向,例如水平向外,水平向内,垂直向外及垂直向内方向。
工件偏转,表面粗糙度和加工表面均与各种刀具如切割取向测量方向,并导致/垂直角度。结果表明,5轴铣削加工涡轮叶片是最佳的切割策略水平向内的方向的倾斜角。.
关键词:高速铣削,5轴铣削铅/垂直角度,刀具方向
介绍
    最近,已经有许多研究高速铣削方面的高的精度和高效率在航空航天,汽车,电子,半导体切割制造行业。
建议由Carl J.索罗门高速加工[1]在1924年,以提高准确性,降低成本,节省加工时间。它有一种可能性,减少材料的在高切削速度为去除量每齿相比传统的切削。因此,它能够这样做,加工精度高。另一方面,它是能够通过使用具有高效的制造高进给率和材料去除率[2,3]。
这些天来,成分复杂的高文准确性是必需的。然而,这是不可能使用传统的3轴产生非常精确的产品铣削加工。因此,5轴铣削的重要性有所增加,因为通过获得高的尺寸精度的一组加工。此外,它是能够进行侧切割,因为工人可以改变倾斜角的一种工具。因此,表面粗糙度是更好比由3轴铣削产生的产品。 5轴铣已产生了广泛的涡轮叶片,叶轮,轮胎模具和螺钉。
一些研究已进行5轴铣削不同的作者。 Rao等人。 [4]同时避免欺诈和选择一个有效的刀具廓形的5轴铣削的进给方向的最佳选择。巴普蒂斯塔和Antune的西蒙斯[5]认为,表面粗糙度改善的倾斜铣削在进给方向。 Tonshoff和埃尔南德斯卡马乔[6]的最佳倾斜角为158在圆头端铣块体材料。本文的计算结果基于机械加工在各种刀如切割方向取向,并铅/倾斜角度发生在5轴高速铣削涡轮机叶片。 涡轮机叶片的铣削英文文献和翻译(2):http://www.youerw.com/fanyi/lunwen_8347.html
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