The conception of deformation angle of helix pre-former is introduced and process parameters are analyzed with math regression method.
以T形焊接接头为算例，结合热弹塑性有限元法和映射应变分量法，研究了角焊缝角变形的产生机制。
According to the volume oil formula of the straight gear pump, the volume oil formula of the helical gear pump is got and the helix Angle no trapping is found.
利用直齿齿轮泵的困油容积变化公式，求出了斜齿齿轮泵的困油容积变化公式，得到了斜齿齿轮泵不发生困油的螺旋角。
Within the range of machining, if the helix Angle adopts a bigger value, it may improve the meshing performance and develop the advantages of double enveloping TI worm gearing.
在加工允许的范围内，螺旋角取较大的数值，能够较好地改善啮合性能，从而发挥二次包络TI蜗杆传动的优势。
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