JPH037453U

JPH037453U -

Info

Publication number: JPH037453U
Application number: JP6610190U
Authority: JP
Priority date: 1984-05-29
Filing date: 1990-06-25
Publication date: 1991-01-24
Also published as: JPS60263658A

Description

[Brief explanation of the drawing]

第１図はこの考案による研削装置がタービン軸
の穿孔に挿入された状態を示す部分断面図、第２
図は作動状態にあるこの考案の装置を備えたター
ビン軸の部分断面図、第３図は別の作動状態にあ
るこの考案の装置を備えたタービン軸の部分断面
図、第４図は第１図の−線による断面図であ
る。１……タービン軸（鍛造軸）、３……中央穿孔
部、５……瓶形穿孔部、７……研削装置、９……
第１の中ぐり棒、１１……第２の中ぐり棒、１３
……ハブ、１５……膨張可能リング、２１……フ
レキシブルカバー、２３……ヘツド、２５……ア
ーム、２７……石、３１……流体又は潤滑剤溜め
（膨張させるための手段）、４５……モータ（第
２の棒を回転させるための手段）、４７……モー
タ（第１及び第２の棒を往復させるための手段）
。 Fig. 1 is a partial sectional view showing the grinding device according to this invention inserted into the borehole of the turbine shaft;
3 is a partial sectional view of a turbine shaft equipped with a device of the invention in an operating state; FIG. 3 is a partial sectional view of a turbine shaft equipped with a device of the invention in another operating state; FIG. It is a sectional view taken along the - line in the figure. DESCRIPTION OF SYMBOLS 1... Turbine shaft (forged shaft), 3... Central perforation part, 5... Bottle-shaped perforation part, 7... Grinding device, 9...
First boring bar, 11...Second boring bar, 13
... hub, 15 ... inflatable ring, 21 ... flexible cover, 23 ... head, 25 ... arm, 27 ... stone, 31 ... fluid or lubricant reservoir (means for inflation), 45 ... ...Motor (means for rotating the second rod), 47...Motor (means for reciprocating the first and second rods)
.

Claims

[Claims for Utility Model Registration] A first boring bar that fits into the borehole; a second boring bar rotatably disposed within the first boring bar; and a second boring bar that is rotatably disposed within the first boring bar; means for rotating the second boring bar; means for reciprocating the first and second boring bars; disposed at one end of the second boring bar that is inserted into the borehole; a head; a plurality of arms pivotally connected to the head; a stone attached to each end of these arms; a hub secured to the first boring bar near one end inserted into the borehole; an inflatable ring surrounding the inflatable ring; a flexible cover attached to the hub and enclosing the inflatable ring; means for inflating the inflatable ring when the inflatable ring is in the borehole; and inserted into the borehole. The ends of each of the boring bars are centered and vibrations are suppressed, so that each of the boring bars is sufficiently stabilized to grind the inner surface of the bore, even within a bottle-shaped bore. A grinding device for a bottle-shaped perforation part of a perforation shaft, characterized in that: