US 10,464,182 B2Granted

Method and grinding machine for grinding external and internal contours of workpieces in one clamping

AssigneeErwin Junker Maschinenfabrik GmbH

InventorErwin Junker

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Abstract

A method and a grinding machine to implement the method includes, in a single clamping, a machine part is ground. The part is clamped on its ends and has an internal recess for grinding. The internal recess is ground with an internal grinding wheel, wherein the part is rotated between a workpiece headstock and a tailstock, and an external contour is ground by means of a grinding wheel. The part is held on the tailstock by a hollow tailstock sleeve, on the end region of the internal recess, and the internal grinding wheel passes through the hollow tailstock sleeve during grinding. In the grinding machine, a separate grinding spindle head carrying the internal grinding wheel can be included in the region of the tailstock, and can be advanced against the peripheral surface of the internal recess by passing through the hollow tailstock sleeve and the hollow center.

Claims17

Dependent claims

A method for the grinding, in a single clamping, of a machine part made to rotate about its longitudinal axis, clamped on both of its axial ends and having an internal recess on at least one of its ends which is ground by means of an internal grinding wheel, wherein the machine part is held rotatingly driven between a workpiece headstock and a tailstock, in a single clamping, and the external contour thereof is ground by means of at least one grinding wheel, wherein

a) the machine part is held centrically on the tailstock by means of a live or rotationally driven hollow tailstock sleeve on the end region of the internal recess,
b) the internal grinding wheel passes through the hollow tailstock sleeve during the grinding of the internal recess, and
c) the grinding of the internal recess and the grinding of the external contour of the machine part are performed at least partially at the same time, and
d) the clamping on the workpiece headstock is performed with a centrically clamping chuck or with a chuck having equalizing jaws, and a center with engages with the end face of the machine part.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/735,267Filed 13 Jun 2016
Priority: DE 10 2015 211 11517 Jun 2015
Published: US 2018/0169819 A121 Jun 2018
Granted: 5 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

B24B 5/12
Involving centres or chucks for holding work: for grinding cylindrical surfaces both externally and internally with several grinding wheels
B24B 41/062
Axially supporting turning workpieces, e.g. magnetically, pneumatically: between centres; Dogs
B24B
Machines, devices, or processes for grinding or polishing