US 10,335,904 B2Granted

Device for manufacturing an assembled camshaft

AssigneeMan Truck & Bus AG

InventorsUlrich Boehme, Adrian Fink

Life of this patent

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Abstract

A clamping device for manufacturing an assembled camshaft for valve-controlled internal combustion engines, in which at least one cam disc with a base circle region and cam region is machined on the running surface and has a cam-disc recess, includes shrinking the cam disc onto a corresponding shaft designed with a defined dimensional overlap by cooling the shaft and heating the cam disc. Before being shrunk onto the shaft, the at least one cam disc is clamped by the clamping device such that a tension force acts on the recess wall region, the tension force corresponding to a predetermined extent to the state of stresses and/or deformation state of the recess wall region after the operation of shrinking the cam disc onto the corresponding shaft. The running-surface machining of the at least one cam disc occurs when the cam disc is clamped by the clamping device.

Claims8

Dependent claims

A device for machining the running surface of at least one cam disc for an assembled camshaft, the at least one cam disc having a cam-disc recess and is shrinkable onto a corresponding shaft to form the assembled camshaft, the device comprising:

a clamping device on which the at least one cam disc with the cam-disc recess is clampable so that a tension force acts on a recess wall region of the cam disc recess, the tension force corresponding to at least one of a state of stresses and a deformation state of the recess wall region when the at least one cam disc is shrunk onto the corresponding shaft, wherein the clamping device comprises a tension tube onto which the at least one cam disc can be pushed by the cam-disc recess, the tension tube being configured to be expandable outward at least in a region assigned to the cam-disc recess by a corresponding application of force to exert a defined tension force on the recess wall region;
and
two male cones actuatable in opposite directions within the tension rod and interacting with female cones of the tension tube.

Dependencies are inferred from the claim text.

Facts

Application: 15/235,833Filed 12 Aug 2016 · division
Priority: DE 10 2013 012 38425 Jul 2013
Published: US 2016/0346881 A11 Dec 2016
Granted: 2 Jul 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

B23P 11/025
By first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits: by using heat or cold
B21D 39/20
Tube expanders: with mandrels, e.g. expandable
B23B 31/40
Chucks ; Expansion mandrels; Adaptations thereof for remote control: expansion mandrels
B23P 11/022
By first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits: by using pressure fluids

Family

Application14/322,352Parent of this division · filed 2 Jul 2014
US 2016/0346881 A1Pre-grant publication · published 1 Dec 2016
US 9,776,288 B2Parent of this division
US 2015/0026977 A1Published application
US 10,335,904 B2This patent

From the US filing history. Foreign family members aren’t listed.