| 摘要 |
PURPOSE: To prevent the surface pressure of honing sticks from being lowered by imparting pressure, corresponding to reaction caused by the deformation of a return elastic body, to a fluid pressure cylinder in association with the increase of this deformation quantity caused by the increase of wear quantity of the honing sticks in a honing head. CONSTITUTION: When an operating fluid is supplied into the upper side pressure chamber 31U of a fluid pressure cylinder 31 to lower a piston 33 in order to insert a honing head 1 into the machined hole of a workpiece to perform honing work, an expansion rod 17 is pushed down through a piston rod 33R. As a result, a honing stick shoes 11 is moved outward in a radial direction, and each honing stick 9 is brought into contact with the inner peripheral surface of the machined hole. When the moving quantity of the expansion rod 17 is increased in association with the wear of the honing sticks 9, the deformation quantity of a return elastic body 29 is increased. The deformation quantity of the elastic body 29 is detected by a linear scale 51 and a sensor 53. On the basis of the detected result, reaction is computed by a computing means 57, and the set pressure of a pressure control valve 49 is controlled. |
