Patent ID: 9186739
Filing Date: 2015-11-17
Classification: B23G,Y10T

Abstract:
1. A method for creating an inner thread in a cylindrical opening of a body having a center axis, using a thread cutter, the cylindrical opening having at least one groove running in a longitudinal direction, a depth of the groove being is equal to or greater than the outer radius of the thread cutter as measured from the center axis, a projection extending radially inwards and axially being provided in the body next to the groove in a circumferential direction, the method comprising the following steps: inserting the thread cutter into the opening, the thread cutter having a plurality of axial lengthwise cutouts evenly spaced on an outer circumference of the thread cutter and a respective set of blades being arranged between each of two neighboring lengthwise cutouts of the plurality of lengthwise cutouts, the blades projecting radially outwards and having cutting edges, several cutting edges of one set of the respective sets of blades arranged one after the other in the longitudinal direction being provided on the lengthwise cutout offset with respect to each other in the circumferential direction, the cutting edges being pushed into the groove when the thread cutter is inserted; rotating the cutting tool by a maximum of 360° in order to create an entire inner thread in the projection, the cutting edges penetrating into the projection one after the other as the thread cutter turns; and axially moving the thread cutter out of the opening.