HARD-ROLLING ROLLER HEAD FOR THE DEEP ROLLING OF THE CRANKPINS OF A SPLIT-PIN CRANKSHAFT

Abstract

The invention discloses a hard-rolling roller head with two separate housings for deep rolling the outside radii of adjoining crankpins of a split-pin crankshaft. The hard-rolling roller head provides an effective support of the two housings against one another, when machining split-pin crankshafts, and simultaneously prevents the upper areas of these housings from drifting apart.

Claims

1. A hard-rolling roller head with two separate housings for deep rolling the outside radii or recesses of the adjoining crankpins of a split-pin crankshaft, with respectively one work roller being pivoted in the housings, to which a rolling force is applied and which is pressed into the radii or recesses of the crankpin, with the split-pin crankshaft turning around its axis of rotation during machining and the two housings, independently of one another, following the lifting motions of the respectively assigned crankpins, with the housings—in relation to the axis of rotation of the split-pin crankshaft on both sides and at radial distance to the same—featuring one extension section each, and with an assembly, functionally acting as a support device, being located between the facing internal sides of the two housings that supports the two housings against one another, wherein a plurality of several components cylindrically shaped and/or ball-shaped contours on the inside of one housing are supported such that they rotate freely and roll on the inside of the other housing.

2. A hard-rolling roller head in accordance with claim 1, wherein on the inside of the housing equipped with cylindrically shaped and/or ball-shaped components several recesses are included, in which, respectively, one cylindrical or ball-shaped component is located.

3. A hard-rolling roller head in accordance with claim 2, wherein the recesses each have a depth that the cylindrically shaped or ball-shaped components protrude from the recess with maximally 25% of their cross-sectional surface area.

4. A hard-rolling roller head in accordance with claim 2, wherein the recesses respectively feature an opening orientated toward the outside of the housing.

5. A hard-rolling roller head in accordance with claim 1, wherein the cylindrical and/or ball-shaped components are respectively located in the corner areas of the housings.

6. A hard-rolling roller head in accordance with claim 5, wherein respectively two cylindrical or ball-shaped components are located at the end section orientated towards the deep rolling unit and respectively two cylindrical or ball-shaped components are located at each of the two extension sections.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0013] FIG. 1 shows a first housing of a hard-rolling roller head designed in accordance with the invention.

[0014] FIG. 1a shows a plan view with a view onto the side area functionally situated outside.

[0015] FIG. 1b shows a first side view with partially cross-sectioned base body.

[0016] FIG. 1c shows a second side view with partially cross-sectioned base body.

[0017] FIG. 2 shows a second housing of a hard-rolling roller head designed in accordance with the invention.

[0018] FIG. 2a shows a plan view with a view onto the side area functionally situated outside.

[0019] FIG. 2b shows a first side view.

[0020] FIG. 2c shows a second side view with partially cross-sectioned base body.

[0021] FIG. 3 shows a cutout from a deep rolling unit equipped with a hard-rolling roller head in accordance with the invention.

DETAILED DESCRIPTION

[0022] The hard-rolling roller head 1, shown in the drawing, for deep rolling external recesses or radii on the crankpins of a split-pin crankshaft 2 features two deep rolling head housings 3 and 4, the inside surfaces of which are facing one another. The deep rolling of the recesses or radii is effected with work rollers 5 and 6 to which a rolling force is applied by deep rolling unit 7 via the housings 3 and 4 of the hard-rolling roller head 1. Whilst deep rolling takes place, the split-pin crankshaft 2 turns around its axis of rotation, which runs vertically to the presentation plane of FIG. 1a, FIG. 2a and FIG. 3.

[0023] FIG. 1 and FIG. 2 show the basic setup of the two deep rolling head housings 3 and 4. Accordingly, the housings 3 and 4 respectively comprise bearing covers 8, bearing bolts 9, plates 10, leaf springs 11, cage plates 12, cages 13, parallel pins 14 and various different screws 15. The work rollers 5 and 6 are respectively supported by a guide roller 16 which is supported in the deep rolling head housing 3 or 4 on radial bearings 17 and axial bearings 18 such that it is freely rotatable.

[0024] On the inside of the deep rolling head housing 3, several components 19 with a cylindrically shaped and/or ball-shaped contour are supported such that they are freely rotatable. These components 19 can roll on the inside of the other deep rolling head housing 4.

[0025] Here, on the inside of the deep rolling head housing 3, several recesses 20 are embodied in which respectively a cylindrically shaped and ball-shaped component 19 is located. Thus, these components 19 are fixed in position very exactly so that they provide for a functionally safe support in all relative positions of the housings 3 and 4 towards one another.

[0026] The recesses 20 preferably feature such a construction depth that the components 19 supported therein such that they are freely rotatable protrude from the respective recess 20 with maximally 25% of their cross-sectional surface (FIG. 1c). In addition, an opening 23 is embodied respectively at the recesses 20, which is orientated toward the outside of the deep rolling head housing 3 and by means of which, for example, lubricants for the cylindrically shaped or ball-shaped components 19 can be fed in

[0027] For an effective support of the two deep rolling head housings 3 and 4 against one another, the cylindrically shaped or ball-shaped components 19 are respectively located in the corner areas of the deep rolling head housing 3. This results in a particularly effective support, inasmuch (as shown in the drawing) as respectively two components 19 are located at the end section orientated toward the deep rolling unit 7, and respectively two components 19 at each of the two extension sections 21 of the deep rolling head housing 3.

[0028] FIG. 3 shows a cutout from a deep rolling unit 7, illustrating the active connection of the hard-rolling roller head 1 with work rollers 5 or 6, the split-pin crankshaft 2 to be machined and a support roller head 22 as well as the location of the cylindrically shaped or ball-shaped components 19 located between deep rolling head housings 3 and 4.