Isostatic pressing soft die sleeve weight-limiting isovolumetric powder filling process and device

The invention discloses an isostatic pressing soft die sleeve weight-limiting isovolumetric powder filling process and device. The process adopts the cooperation of spiral powder filling and synchronous rapping, adopts a multi-section feeding mode, and realizes the weight-limiting isovolumetric powder filling of hard alloy isostatic pressing powder through the real-time monitoring of the powder density and the variable-frequency ultrasonic compaction. According to the process, the powder density uniformity of all positions in a die sleeve in the powder loading process can be improved, the diameter difference of a final pressed blank at different positions is reduced, the roundness and cylindricity of the pressed blank are improved, and the casting yield and the size controllability of a rod blank are improved. 本发明公开了一种等静压软模套限重等容装粉工艺及其装置，该工艺是采用螺旋式填粉与同步振打相配合，并采用多段加料模式，以及对粉料密度的实时监测及变频超声振实，实现硬质合金等静压压制粉料的限重等容装粉。本发明能够提高装粉过程中模套内部各处粉末密度的均匀性，减少最终压坯在不同位置处直径的大小差异，改善压坯圆度、圆柱度，提高实收率及棒坯的尺寸可控性。