Test verification by company A.
In NC lathe machining, when stepped inner surface machining, small inner diameter machining from the large inner diameter machining to the back, the step size was gradually reduced with 9 steps, when the stepped part of the mating shaft was inserted in the inner diameter part , Somehow the small diameter part at the back interfered, it turned out that it can not insert.
As a result of examination, in stepped inner surface processing, every time the diameter became smaller from the entrance, processing was carried out by raising the rotation for the same peripheral speed processing.
As a result, as the distance to the inner side increases, the swinging of the rotation axis core occurs, and at each processing diameter of the stepped inner diameter, increasing the rotation causes a rotary core blur, and as a result, when the stepped shaft is inserted , It interfered and it can not be inserted.
As a result, it was found that the rotation increase as going in from the inner diameter entrance leads to the runout of the axis core, and as a result, the standard 10 inch chuck of the NC lathe and the AB 250 automatic balance device were replaced with the 10 inch chuck I shrunk into the outer periphery and compare each inner core sway to compare data.