PROCESS FOR PRODUCING A HEAT-TREATED HUB CARRIER PROVIDED WITH A WHEEL BEARING

Abstract

The invention relates to a process for producing a heat-treated hub carrier provided with a wheel bearing, the process comprising the successive steps: a) provision of a hub-carrier blank which is preferably cast, b) solution annealing of the hub carrier, c) quenching of the hub carrier, preferably in water and/or air, d) at least partial machining of the hub carrier, e) insertion of the wheel bearing into a recess of the hub carrier, f) re-annealing or hot ageing of the hub carrier.

Claims

1. A method for producing a heat-treated wheel support which is provided with a wheel bearing, comprising the method steps which follow one another: a) providing of a wheel support blank which is preferably cast b) solution annealing of the wheel support c) quenching of the wheel support, preferably in water and/or air d) at least partial machining of the wheel support e) introducing of the wheel bearing into a receptacle of the wheel support f) tempering and/or artificial ageing of the wheel support

2. The method, in particular as claimed in claim 1, wherein the solution annealing and tempering of the wheel support corresponds to a T6 heat treatment.

3. The method, in particular as in claim 1, wherein the introducing of the wheel bearing into the receptacle of the wheel support takes place by way of being pressed in.

4. The method, in particular as claimed in claim 1, wherein the wheel support is heated after the at least partial machining of the wheel support and before the introducing of the wheel bearing into the receptacle of the wheel support.

5. The method, in particular as claimed in claim 1, wherein the introducing of the wheel bearing into the receptacle of the wheel support after the heating takes place by way of being shrunk in.

6. The method, in particular as claimed in claim 1, wherein the wheel bearing is secured axially in the receptacle of the wheel support.

7. The method, in particular as claimed in claim 1, wherein the wheel bearing is secured in the receptacle of the wheel support between a radially inwardly extending shoulder of the wheel support and a securing ring which is inserted into the wheel support.

8. The method, in particular as claimed in claim 1, wherein the wheel bearing is secured in the receptacle of the wheel support between two securing rings which are inserted into the wheel support.

9. The method, in particular as claimed in claim 1, wherein the wheel bearing is secured in the receptacle of the wheel support between a radially inwardly extending shoulder of the wheel support and a further radially inwardly extending shoulder of the wheel support, which further radially inwardly extending shoulder is produced by way of flanging of an edge which runs around the receptacle after introducing of the wheel bearing into the receptacle.

10. The method, in particular as claimed in claim 1, wherein the wheel bearing is secured between a securing ring which is inserted into the wheel support and a radially inwardly extending shoulder of the wheel support, which radially inwardly extending shoulder is produced by way of flanging of an edge which runs around the receptacle after introducing of the wheel bearing into the receptacle.

11. The method, in particular as claimed in claim 1, wherein the wheel support is produced from an aluminum alloy.

12. The method, in particular as claimed in claim 1, wherein the wheel support is produced using the high pressure die casting method, using the gravity die casting method, using the squeeze casting method or preferably using the counter-pressure casting method (CPC).

13. The method, in particular as claimed in claim 1, wherein a wheel bearing of what is known as the first generation (GEN1) is introduced as wheel bearing into the receptacle of the wheel support.

Description

[0028] Further details and advantageous refinements of the invention also result from the following description in conjunction with the drawing, in which:

[0029] FIG. 1 diagrammatically shows a flow chart of a method according to the invention, and

[0030] FIG. 2 diagrammatically shows three situations during the method according to the invention, namely a wheel support, in each case in a perspective illustration and in a sectional illustration, to be precise a) as a cast blank, b) as a machined part without a wheel bearing, and c) as a finally mounted part.

[0031] In order to avoid repetitions, identical designations are used in the figures in so far as they denote identical components.

[0032] FIG. 1 diagrammatically shows a flow chart of a method according to the invention for producing a heat-treated wheel support which is provided with a wheel bearing, comprising the method steps which follow one another: [0033] casting of a wheel support 10 from an aluminum alloy using the counter-pressure casting method (CPC) [0034] solution annealing of the wheel support 10 as a first part of a provided T6 heat treatment [0035] quenching of the wheel support 10 in preferably water and/or air [0036] at least partial machining of the wheel support 10, in particular for providing a receptacle 12 or bore which runs in the axial direction of the wheel support 10 for a wheel bearing 14 of what is known as the first generation (GEN1) [0037] heating of the wheel support 10, the heating not comprising any tempering and/or artificial ageing of the wheel support 10 [0038] introducing of the wheel bearing 14 into the receptacle 12 of the wheel support 10 by way of being pressed in and/or shrunk in, the wheel bearing 14 being secured axially on the one side of the receptacle 12 by way of a radially inwardly extending shoulder 16 of the wheel support 10 [0039] flanging of an edge 18 which runs around the receptacle 12 on the other side of the receptacle 12 after introducing of the wheel bearing 14, with the result that a further radially inwardly extending shoulder 20 of the wheel support 10 is produced, by way of which further radially inwardly extending shoulder 20 the wheel bearing 14 is secured axially [0040] tempering and/or artificial ageing of the wheel support 10 as a second part of a provided T6 heat treatment, in order to obtain the envisaged strength of the wheel support 10.

[0041] To this end, FIG. 2 diagrammatically shows three situations during the method according to the invention, namely a wheel support 10, in each case in a perspective illustration and in a sectional illustration, to be precise a) as a cast blank, b) as a machined part without a wheel bearing 14, and c) as a finally mounted part with a shrunk-in wheel bearing 14 and a flanged shoulder 20.

LIST OF DESIGNATIONS

(Is Part of the Description)

[0042] 10 Wheel support [0043] 12 Receptacle [0044] 14 Wheel bearing [0045] 16 Shoulder [0046] 18 Edge [0047] 20 Shoulder