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针对大长细比带凹底筒形件采用拼焊成形时工艺复杂、成形精度低、产品质量差等缺陷,提出采用普通旋压与强力旋压相结合的复合旋压成形方法来实现其完整制造,通过理论分析获得了复合旋压成形过程中变形量的分配原则。采用普旋圆弧形与强旋直线形相结合的旋轮轨迹,旋压成形筒形件的凹底部分,在旋压系数大于极限旋压系数的条件下拉深旋压获得筒形坯料,采用圆弧形及双锥面旋轮分别将屏蔽罩圆弧段及直筒段旋压减薄到规定尺寸等工序,成功加工出高精度的长细比为2.01的带凹底筒形件,同时生产效率提高了50%左右,为此类零件的制造提供了一种全新的方法。
Aiming at the shortcomings such as complicated process, low forming accuracy and poor product quality, the method of using composite spinning forming method with common spinning and powerful spinning is proposed to achieve the completeness According to the theoretical analysis, the principle of distribution of deformation in composite spinning process was obtained. By using the circular orbit of a circular arc combined with a strong linear rotation, the concave part of the cylindrical part is spun and the cylindrical blank is obtained by drawing and spinning under the condition that the spinning coefficient is greater than the limit spinning coefficient, The arc-shaped and double-cone rotating wheels respectively reduce the circular arc section and the straight section of the shielding shell to the specified size and other processes to successfully process the high-precision concave-convex cylindrical part with the slenderness ratio of 2.01, and at the same time, the production efficiency An increase of about 50%, for the manufacture of such parts provides a completely new way.