WO2015058880A1

WO2015058880A1 - Roller burnishing tool

Info

Publication number: WO2015058880A1
Application number: PCT/EP2014/067544
Authority: WO
Inventors: Andreas Essl; Ralf Fischer
Original assignee: Allgaier Werke Gmbh
Priority date: 2013-10-22
Filing date: 2014-08-18
Publication date: 2015-04-30
Also published as: EP3060359B1; EP3060359A1; EP3060359B2; PL3060359T5; DE102013221391A1; PL3060359T3

Abstract

The invention relates to a roller burnishing tool for generating a tooth structure in a wall (6.2) of a cylindrical blank (6), comprising the following features: • - a clamping device for holding the blank (6); • - an annulus of disc-shaped rotatably mounted rollers (1), the peripheral edges of which are directed against the wall (6.2) of the blank and are pressed against the same; • - bearing journal (2) for mounting the rollers (1); • - a stamp (9) in the inner cavity of the blank (6) having a tooth structure as a counter-mould; • - a drive for generating a relative movement in a feed direction (7) between the rollers (1) and the blank (6). The invention is characterized by the following features: • - a wedge-shaped intermediate body (11) is provided which presses the rollers (1) on the bearing journal (2) by exerting a pressure, stabilizes said intermediate body in a fixed environment, and the position of said intermediate body in the feed direction (7) is determined by at least one replaceable spacer.

Description

roller burnishing tool

The invention relates to a roller burnishing tool for producing a tooth structure in the wall of a preform. It is generally about producing a spline in the wall of a cylindrical blank to produce a gear.

Such a roller burnishing tool comprises disc-like rollers which are rotatably mounted. The rollers are arranged such that their peripheral edges roll along the lateral surface of the cylindrical blank, applying a pressure to the lateral surface, so that the lateral surface is pressed in, whereby a tooth space is formed. There are a variety of roles associated with the preform. The rollers run - seen in plan view of the cylindrical blank - more or less radially to this. At the same time a so-called stamp is provided within the blank. This fills the interior of the blank. The punch is toothed in the manner of a gear, so that when creating a tooth gap through one of said disc-shaped rollers, a tooth of the punch from the inside presses on the wall of the cylindrical blank while pressing material between two adjacent rollers outward and thus forms a tooth on the blank ,

Reference is made to EP 2 282 854 B1, which describes a roll forming method.

With rolling tools of the type described to create a final product that complies with the target dimensions with high accuracy. This concerns in particular the width of the tooth gaps. However, time and again it shows that this requirement can not be met. The main reasons for deviations from the nominal dimension are differences in the quality of the steel used. This can lead to significant deviations in the target dimensions when using qualitatively different steel batches. In the case of such deviations, changes must be made to the roller burnishing tool. In particular, it is then necessary to replace the disc-shaped rollers. If the burnishing process leads to excessively deep tooth gaps, then you have to choose rolls of small diameter, and vice versa. Such

Change processes are complex and expensive. In particular, you need a large supply of roller burnishing. In case of dimensional deviations of the workpiece, the current roles must be removed from the roller burnishing tool, suitable rolling rollers selected from the stock and these are installed.

DE 2 017 709 describes a tool for rolling longitudinal grooves into cylindrical workpieces, wherein the profile rollers are movably mounted in the direction of the rolling force. Each profile roller is supported by two support rollers touching the profile roller at its circumference, which are mounted in a receiving body. Between each receiving body and an inner wall of a

Armierungsringes is provided a Verstellkeil, by two each

Tightening screws can be adjusted. A disadvantage of this arrangement is that an exchange of the profile rollers, for example by a roller with a new outer contour for producing a different teeth, only with a simultaneous adjustment, in particular an exchange of the support rollers can be done and the entire arrangement has a large space requirement and an unfavorable load application has in the various components.

DE 10 2009 044 544 A1 describes a forming device and a

Einrichtverfahren for introducing an internal and external teeth in a cylindrical workpiece, wherein the profile rollers for adjustment

Eccentric bushings are stored. On the further state of the art is on

DE 10 2008 017 608 B3 and DE 10 2007 062 361 AI referenced. The invention is based on the object, a roller burnishing tool according to the

The preamble of claim 1 to be designed such that you can respond quickly and with little effort to deviations of the workpiece. The roller burnishing tool is intended to provide, in particular, an alternative to the conventional adaptation of the penetration depth or the profile of the rollers, which is improved in terms of installation space and costs, as well as in terms of service life.

This task is done with a roller burnishing tool of each of the three

solved independent claims.

In all three main ideas, an intermediate body is advantageously provided. This exerts a pressure on the bearing journals of the rollers, so that they are displaced against the lateral surface of the blank. Each intermediate body is supported by a fixed environment.

According to the first main idea, the intermediate body is wedge-shaped. Of the

Contact pressure can be adjusted by adjusting the position of the wedge-shaped

Set between body. The position of the intermediate body in one

Feed direction for generating a relative movement between the rollers and the blank is determined by at least one replaceable spacer.

For example, the at least one spacer is arranged by at least one interchangeable positioning ring or interchangeable positioning ring segment, typically a plurality of circumferentially distributed ones

Positioning ring segments formed. For example, the wedge-shaped

Intermediate body in said feed direction for generating the

Relative movement on both sides of exchangeable spacers, in particular exchangeable positioning rings or interchangeable

Be included positioning ring segments. In particular, lies the wedge-shaped Intermediate body, which is advantageously designed as a wedge ring, on at least one spacer element, advantageously at least one positioning ring or a plurality of positioning ring segments and is thereby supported. The spacer, in particular the at least one positioning ring or the positioning ring segments, can be detachably connected to the intermediate body, in particular screwed.

According to the second main idea of the invention, a hydrostatic pressure chamber is provided. By changing the hydrostatic pressure, the position of the rollers relative to the blank can be changed. When providing an intermediate body this may for example have a space which can be connected to a hydrostatic pressure medium to inflate said space more or less and thus the dimension of the intermediate body in

To change the pressing direction.

According to the third main idea of the invention, the intermediate body or another element which exerts the contact pressure at least indirectly temper, best by means of electrical resistance heating. Again, this allows the distance between the rollers change relative to the blank.

Particularly in the second and third main aspects of the invention, changing the position of the rollers relative to the blank may even be advantageously done during operation, at least without any rebuilding or removal of the rollers.

The invention is explained in more detail with reference to the figures and an embodiment. The following is shown in detail: shows in an axial section the essential components of a

Rolling tool according to an embodiment of the invention. Figure 2 shows a perspective view of a section of the roller burnishing tool according to Figure 1. Figure 3 shows again in a perspective view another

Section of the article of Figure 1.

The roller burnishing tool shown in FIG. 1 comprises the following components: One of numerous rollers 1 (roller burnishing rollers) is rotatably mounted on a bearing journal 2. The bearing journal 2 is in turn mounted in a housing 3. The housing 3 is fixed in a so-called boiler house 4, which has a cover 5.

A blank 6 has the shape of a cylindrical hollow body with a closed bottom 6.1 and a cylindrical wall 6.2. The blank 6 is made of a blank by deep drawing. The circuit board is a circular steel disk. To produce a gear from the blank 6, 1 grooves must be pressed into the wall 6.2 by rolling by means of the rollers. This is done in the present case in that the blank 6 is moved from an upper position I shown here in a lower position II also shown. As can be seen, the roller 1 is mounted and arranged so that it pushes the wall 6.2 when lowering the blank 6 inward. In each case two adjacent rollers 1 form a tooth which is parallel to the feed direction 7 of the blank 6. The blank 6 is clamped between a counter-holder 8 and a punch 9. The counter-holder 8 is fixedly connected to a quill 10, for example by screwing. The punch 9 is located inside the blank 6. It is itself shaped like a gear. The teeth of the punch 9 work at

Rolling process with the rollers 1 together by one tooth of the punch 9 engages between two adjacent rollers 1. According to the first main idea of the invention, an intermediate body 11 is provided. This is preferably designed as a wedge ring and surrounds all rollers 1 with the plurality of housings 3 and the center arranged in the blank 6. The arrangement of the wedge ring is shown in FIG. The intermediate body 11 may be divided into numerous individual bodies or be made in one piece.

The radial position of the rollers 1 can be adjusted by means of the wedge-shaped intermediate body 11. As can be seen from Figure 1, this is in a likewise annular and wedge-shaped receiving space 12. The further the wedge-shaped intermediate body 11 is driven into the receiving space 12, the deeper penetrates the peripheral edge of the single roller 1 in the material of the blank 6 and so on the tooth height gets bigger.

From Figures 2 and 3 can be seen even more precise shape and arrangement of the rollers 1 and the associated housing 3. In each case two adjacent rollers 1 are in a housing 3, here in two parts, arranged.

Between two adjacent pairs of rollers 1 there is a wedge segment 15. This is stationary and determines the orientation and the position of the housing 3, and thus also the rollers. 1

In the present embodiment, the boiler house 4 with the therein

arranged housings 3 and rollers 1 stationary. By contrast, the preform 6 performs the already mentioned translatory movement in the feed direction 7, here from top to bottom, optionally also from bottom to top. The blank 6 takes in its translational movement, the rollers 1 by frictional engagement with and thus puts these in circulation. The rollers 1 thus need no own drive. The position of the intermediate body 11 in the feed direction 7 is defined by exchangeable positioning rings 14. The positioning rings 14 may be designed as circumferentially closed rings. However, they can also be formed by a plurality of individual spaced from each other or adjacent to each other positioned ring segments. Finally, instead of the positioning rings 14 and not annular spacers can be used. By the spacers, here the positioning rings 14, with the position of the intermediate body 11 in the feed direction 7 at the same time the penetration depth of the disc-shaped rollers 1 defined in the material of the blank 6. Thus, the penetration depth can be changed by inserting accordingly in their thickness (height) designed positioning rings 14. If the positioning ring 14 in the feed direction 7 at the narrow end of the receiving space 12 is comparatively thin, so the wedge-shaped intermediate body 11 immersed deeper into the tapered

Receiving space 12 and pushes the housing 3 adjacent to it and thus on the bearing pin 2, the roller 1 comparatively further in the direction of

Blanks 6. If, however, here (in the drawing below in the receiving space 12), a comparatively thicker positioning ring 14 is inserted, the

Intermediate body 11 is displaced in the direction of the further portion of the receiving space 12, so that the housing 3 with the roller 1 in the direction of the supporting fixed environment, here the boiler house 4, press and the role 1 dives less in the wall 6.2 of the blank 6 a.

In the embodiment shown, the bearing journals 2 have a special shape, which can also be embodied independently of the features described further in this exemplary embodiment. Thus, the bearing journals 2, each carrying a roller 1, here in each case a pair of rollers 1, at its axial portions which protrude beyond the rollers 1 and are inserted into the housing 3 or the housing 3, provided with a flattening 13. This flattening 13 can be seen in FIGS. 1, 2 and 3. The flats 13 are provided on the peripheral portion of the bearing pin 2, in the direction of the fixed Environment in which the housing 3 supported by the or the intermediate body 11, positioned. In this way, a more favorable surface pressure between the bearing pin 2 and the housings 3 is achieved when the pressure force resulting from the advancement of the rollers 6 in the feed direction 7, on the rollers 1, the bearing pin 2, the housing 3, the or the intermediate body eleventh in the fixed environment, here the boiler house 4, is derived. A flattening 13 can, for example, as can be seen in FIG. 2, merge into the round, in particular circular circumferential region of the bearing journal 2 via a chamfer or chamfer in the circumferential direction. The mating contour in the housing 3 does not have to be designed identically, there is, for example, a round

or rounded transition in the circumferential direction from the region of the flattening in the circular or circular peripheral portion possible. In the design shown here, with the exception of the flats 13 are substantially cylindrical bearing journal provided with beveled end faces, see the chamfer 16. The two end chamfers 16 of a journal 2 extend toward each other in the direction of the blank 6.

As a result, the bearing journals 2 can be positioned closer to each other in the manner of a polygon, over the circumference of the blank 6. Advantageously, the bearing journal 2 receiving housing 3 on the side facing away from them supported rollers 1 a corresponding chamfer 17, which is in particular flush with the chamfer 16 of the bearing pin 2 and / or is positioned plane-parallel thereto.

In the embodiment shown, the housing 3 on its the

Intermediate body 11 facing outside also a flat contact surface, in contrast to an annular bearing surface. This also leads to a more favorable surface pressure. The one or more intermediate body 11 have

Accordingly, at its inner periphery, which faces the blank 6 is, planar contact surfaces and form, as is particularly clear from the figure 3, at its inner periphery a polygon. At its outer periphery, however, the one or more intermediate body 11 may be annular, but this is not mandatory, depending on the design of the contact surface of the fixed environment, here the boiler house. 4

The rollers 1 are mounted exclusively on the bearing journal 2, thus no support rollers or the like are provided or support areas on the outer circumference of the rollers 1. Thus, it is particularly easy, a roller 1 having a first outer contour, which forms a first type of toothing, by another roller 1 with a different contour for another

To change the type of toothing. In the present case, it is also easily possible by the design of the housing 3 to take these together with the rollers 1 from the areas between the wedge segments 15. So are always two housing 3 or housing parts angular, in particular designed L-shaped and form in the assembled state a U-shape, in each of which a roll 1 or here a pair of rollers 1 is added. At the outer end, the legs of the L-shaped housing parts abut each other and at the inner end of the distance is defined and secured by the bearing pin 2 used.

In the journal 2, a Schmierölnut 18 may be introduced, which is here in the figure 2 can be seen and this is carried out on the top of the journal 2.

The paired use of rollers 1 shown here, wherein two rollers 1 adjacent to each other in a housing formed from two parts. 3

or in two adjacent housing 3 is used, offers the advantage that in its diameter comparatively small rollers 1 can be used without the risk of collision of the components carrying them over the circumference of the blank 6 threatens. Thus, a particularly compact embodiment can be created. In the embodiment shown here, two spacers, preferably in the form of positioning rings 14 or two groups of spacers or positioning ring segments are provided, namely a

Spacer or a first group under the or

Intermediates 11 and a second spacer or a second group above the one or more intermediate bodies 11. These two

Spacers or groups of spacers together form a constant height, so that an exchange of or

Intermediate body 11 for setting different penetration depths of the rollers 1 in the blank 6 is not necessary. However, in another attachment of the intermediate body or bodies 11, a spacer or a group of spacers could possibly be dispensed with. Here are the spacers (positioning rings 14) with the intermediate body

Uverschraubt. This is particularly advantageous when a plurality of spacers over the circumference of an intermediate body 11 or a plurality of

Between bodies 11 is used over the circumference of the blank 6. However, it may be possible to dispense with such a screw connection or another positive and / or frictional, but usually releasable connection can be used.

The other two main ideas are also very interesting in practice. This makes it possible to change the dimension of the intermediate body (or a plurality of intermediate bodies) 11 in the pressing direction of the rollers 1. This happens in the case of the second main idea by means of hydrostatic pressure. Namely, between body 11 may have a space which is connectable to a hydrostatic pressure medium, for example to a pressurized oil, and which inflate said space and thus the dimension of the

Can increase between body 11 in Anpressrichtung. You can also get one Integrate hydrostatic space in the boiler house or in the housing. Then the intermediate body 11 can be omitted.

One can thus do without intermediate body 11 by simply provides a hydrostatically acted space between the individual housings 3 and the boiler house 4.

According to the third main idea, the contact pressure acting on the

Bearing 2 acts, and thus on the penetration depth of the roller 1 in the wall 6.2 of the blank 6, generated by tempering, preferably by means of electrical resistance heating. Whether one uses an intermediate body or another element that is responsible for the pressure, is a subordinate question. The invention can be not only in the production of gradverzahnten

Apply gears but also in helical gears. It does not even have to be gears, but it come for the application of the invention, any teeth into consideration, even on non-rotating components.

LIST OF REFERENCE NUMBERS

role

pivot

casing

boiler house

cover

blank

ground

wall

feed direction

backstop

stamp

Pinole

intermediate body

accommodation space

flattening

positioning

wedge segment

Beveled

lubricating oil groove

Claims

claims

1. Rolling tool for producing a tooth structure in a wall (6.2) of a cylindrical blank (6), comprising the following features:

1.1 a clamping device for holding the blank (6);

1.2 a ring of disc-shaped rotatably mounted rollers (1) whose peripheral edges are directed against the wall (6.2) of the blank and can be pressed against them;

1.3 bearing pin (2) for supporting the rollers (1);

1.4 a punch (9) in the interior of the blank (6) with a tooth structure as a counter-mold;

1.5 a drive for generating a relative movement in one

Feed direction (7) between the rollers (1) and the blank (6);

characterized by the following features:

1.6 it is a wedge-shaped intermediate body (11) is provided which presses the rollers (1) by exerting a pressure on the bearing pin (2), is supported on a fixed environment and its position in the

Feed direction (7) by at least one interchangeable

Spacer is determined.

2. Rolling tool for producing a tooth structure in a wall (6.2) of a cylindrical blank (6), comprising the following features:

2.1 a clamping device for holding the blank (6);

2.2 a ring of disk-shaped rotatably mounted rollers (1) whose peripheral edges are directed against the wall (6.2) of the blank and can be pressed against them;

2.3 bearing pin (2) for supporting the rollers (1);

2.4 a punch (9) in the interior of the blank (6) with a tooth structure as a counter-shape;

2.5 a drive for generating a relative movement between the rollers (1) and the blank (6);

characterized by the following feature:

2.6 a hydrostatic chamber is provided for positioning the rollers (1) relative to the blank (1).

3. Rolling tool for producing a tooth structure in a wall (6.2) of a cylindrical blank (6), comprising the following features:

3.1 a clamping device for holding the blank (6);

3.2 a ring of disc-shaped rotatably mounted rollers (1) whose peripheral edges are directed against the wall (6.2) of the blank and can be pressed against them;

3.3 bearing pin (2) for supporting the rollers (1);

3.4 a punch (9) in the interior of the blank (6) with a tooth structure as a counter-mold;

3.5 a drive for generating a relative movement between the rollers (1) and the blank (6);

characterized by the following features:

3.6 it is a tempering device, in particular an electrical

Resistance heating provided to adjust the position of the rollers (1) relative to the blank (1), by tempering of the rollers (1) directly or indirectly bearing component

4. Rolling tool according to claim 1, characterized in that the at least one spacer is formed by at least one exchangeable positioning ring (14) or exchangeable positioning ring segments.

5. Rolling tool according to claim 4, characterized in that the wedge-shaped intermediate body (11) in the feed direction (7) on both sides of replaceable spacers, in particular positioning rings (14) or positioning ring segments is included.

6. Rolling tool according to one of claims 4 or 5, characterized

in that the wedge-shaped intermediate body (11) rests and is supported on at least one spacer, in particular positioning ring (14) or a large number of positioning ring segments.

7. Rolling tool according to one of claims 4 to 6, characterized

in that the spacer, in particular the at least one positioning ring (14) or the positioning ring segments releasably on

Intermediate body (11) connected, in particular screwed.

8. burnishing tool according to one of claims 1 to 7, characterized

characterized in that the intermediate body (11) is designed as a wedge ring.

9. Rolling tool according to one or more of claims 1 to 8, characterized in that the rollers (1) in a boiler house (4) are mounted.

10. Rolling tool according to one of claims 1 to 9, characterized

in that in each case one roller or a pair of rollers (1) is arranged in a one-piece or multi-part, in particular two-part housing (3) and is carried by means of a bearing journal (2) mounted in the housing (3).

11. Rolling tool according to one of claims 1 to 10, characterized

in that the rollers (1) are positioned on and supported by journals, the rollers (1) in particular

are stored exclusively by the journals (2).

12. Rolling tool according to one of claims 10 or 11, characterized in that the bearing pins (2) at its two axial ends over the circumference of a chamfer (16), via which the on the rollers (1) acting pressure force in the housing ( 3) is derived.

Rolling tool according to one of claims 1 to 12, characterized

characterized in that the bearing journals (2) are provided on their two end faces with chamfers (17) running towards each other and are positioned in the manner of a polygon over the circumference of the blank (6).