AXIS THICKENING MOLDER AND AXIS THICKENING MOLDING METHOD

• Main Authors: TSUDA SATOHIKO, NISHIMURA SHINICHI, TOYODA HIROAKI, TAKESHITA TATSUMI
• Format: Patent
• Language: English; Japanese
• Published: 21.04.2016
• Subjects: FORGE FURNACES; FORGING; HAMMERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PRESSING METAL; PUNCHING METAL; RIVETING; TRANSPORTING

PROBLEM TO BE SOLVED: To enable an enhancement in circularity of the thickened part of a metal shaft member when the thickened part is to be formed by using the axis thickening molding method.SOLUTION: An axis thickening molder 1, which thickens the periphery of the action part of a work-piece W in the radial direction of a central axis X1 to form a thickened part Wa having a larger diameter than the work-piece W, includes an outer diameter measuring apparatus 30 that measures the outer diameter of the thickened part Wa for every phase angle around the central axis X1 and a control apparatus 20 that controls rotational speed N, compression stress σa, and flexural stress σb. The control apparatus 20 has such a configuration as to adjust at least one of the rotational speed N, compression stress σa, and flexural stress σb so that the thickening amount at a predetermined phase angle in a radial direction when the outer diameter at a predetermined phase angle in the outer diameter of the thickened part Wa measured when the work-piece W is on an n-th turn is larger than the outer diameter at another phase angle in the outer diameter of the thickened part Wa measured when the work-piece W is on an n-th turn.SELECTED DRAWING: Figure 1 【課題】軸肥大成形方法を用いて、金属軸部材の肥大部を形成する際に、肥大部の真円度を高めることができる。【解決手段】ワークＷの作用部周りを中心軸Ｘ１の径方向に肥大化させて、ワークＷよりも大径の肥大部Ｗａを形成する軸肥大成形装置１であって、中心軸Ｘ１回りの位相角毎の肥大部Ｗａの外径を測定する外径測定装置３０と、回転速度Ｎと、圧縮応力σａと、曲げ応力σｂとを制御する制御装置２０とを備え、制御装置２０は、ワークＷがｎ回転目である時に測定した肥大部Ｗａの外径における所定の位相角での外径が、ワークＷがｎ回転目である時に測定した肥大部Ｗａの外径における他の位相角での外径よりも大きい場合は、所定の位相角での径方向の肥大量を、他の位相角での径方向の肥大量よりも小さくなるように、回転速度Ｎと、圧縮応力σａと、曲げ応力σｂとのうちの少なくとも１つを調整する構成とした。【選択図】図１