Forming tool with positioned tooth profile pressure rollers

Abstract

Forming tool with positioned tooth profile pressure rollers (10) for forming longitudinal teeth into the walls of cup-shaped and hollow cylindrical metal parts mounted on receiving bolts and forming dies in different radial working positions, which require repeatably adjusted radial setting positions (1 to 8) of the tooth profile pressure rollers (10), that each of the disc-shaped toothed profile pressure rollers (10) rotatable about a cylindrical axle bolt (12) and the bearing journals (14) arranged on both sides of each axle bolt (12) with their flat and parallel bearing journal positioning and guiding surfaces (17), axially directed between a lower support ring (24) and an upper cover ring (25) and radially abutting a support and adjusting ring (20), form a functional combination of a roller sliding bearing with two radially stepped adjustable support bearings and that the two bearing journals (14) have an identical polygonal cross-sectional shape as mirror images, which can optionally be described as • right-angled trapezoid, • Parallelogram, • Rectangle, • square or as • Octagon is formed and with its bearing pin positioning and guide surfaces (17) in an adjustment area (11) which is arranged between an inner limiting edge (27) on the support ring (24) and a vertical support surface (21) or a support ramp (22) of a support and adjustment ring (20) and is moved and repositioned into several bearing positions (15) of the bearing pins (14), the tooth profile pressure rollers (10) are adjusted in the radial adjustment positions (1 to 8) on the metal part.

Description

Patent description

[0001] The invention is based on the forming tool with positioned tooth profile pressure rollers defined in the preamble of claim 1, with which longitudinal teeth can be produced in the walls of cup-shaped and hollow cylindrical metal parts mounted on receiving bolts and forming dies.

[0002] The state of the art includes a range of tool designs in which the achievement and adjustment of different radial working positions of the forming profiled pressure rollers held in the tool, arranged centrally or star-shaped inwards or outwards in adjustable target dimensions, are integrated into the solution.

[0003] In several invention descriptions, such as in • DE 2829 041 A1 describes, by way of example, a method and a device for manufacturing an internally and externally toothed, cup-shaped component, wherein the preforming of the root circle, the preforming of the tip circle, and at least two final forming of the tooth profile are carried out with several sets of pressure rollers integrated one above the other in a forming tool, without adjustment components. The radial target dimension adjustment of the pressure rollers in these three pressure roller arrangements is carried out, consistently for each of the named manufacturing steps, by their bearing cassettes, in which the pressure rollers are rotatably mounted at different radially stepped distances from the center of the component.

[0004] A stepped adjustment and readjustment of the profile pressing rollers for the production of longitudinal gear teeth as internal and external gear teeth in cylindrical workpieces is the subject of [document / project]. • DE 10 2009 044 544 B4 and in • DE 10 2013 221 329 A1, The target dimension adjustments can be achieved using a range of supplementary interchangeable adjusting elements, relating to each intended target dimension, setting, or readjustment position of the tooth profile pressure rollers in the mold. These interchangeable adjusting elements are available as adjustable extender bushings that adjust axially and outwards, as well as as positioning rings whose thickness differences are guided radially via a wedge ring, enabling stepped setting and working positions of the tooth profile pressure rollers on the workpieces.

[0005] Furthermore, components for stepless adjustment and readjustment of the tooth profile pressure rollers to a target dimension are also exemplified in • DE-OS 2017 709 and in • DE 195 31 907 A1 described.

[0006] From DE 1 142 823 a device for longitudinal profiling of cold workpieces, in particular gears or splined shafts, is further disclosed, which has a tool head with several profile rollers rotatably mounted symmetrically to the axis of a workpiece holder, which with their profile-forming cylindrical surfaces define a workpiece passage, the narrowest cross-section of which lies in a plane perpendicular to the passage axis, in which adjacent profile rollers with conical rolling surfaces can roll against each other.

[0007] The receiving bodies in which the toothed profile pressure rollers are mounted can be adjusted radially by means of adjusting screws via adjusting wedges.

[0008] The disadvantages of these training programs, described as examples for further state-of-the-art training programs, consist of • the investment costs for forming tools equipped with several sets of tooth profile pressure rollers arranged one above the other or in succession, • the acquisition, inventory and maintenance of the molds, which require a range of interchangeable adjustment elements and are in • the lack of repeatability of manual and hydraulically operated push roller adjustments, which is usually done using pull wedges.

[0009] The problem is to find a design for suitable adjustment elements that ensures both an easy and repeatable adjustment and positioning of the tooth profile pressure rollers in the target dimension positions of appropriately adjusted radial adjustment positions.

[0010] This problem is solved by the features of claim 1.

[0011] Each of the disc-shaped tooth profile press rollers of the forming tool for forming longitudinal teeth into the walls of pot-shaped and hollow cylindrical metal parts is rotatably arranged and mounted around a cylindrical axle bolt.

[0012] On both sides of each axle bolt, bearing journals are arranged which, with their flat and parallel bearing journal positioning and guiding surfaces, are held axially between a lower support ring and an upper cover ring and radially against a support and adjustment ring.

[0013] The toothed profile pressure roller arrangement on an axle bolt and the bearing pin design on the axle bolt form a functional combination of a roller sliding bearing with two radially stepped adjustable support bearings.

[0014] The two bearing journals of the axle bolt have identical polygonal cross-sectional shapes, mirrored in their shape. These can be configured as a right-angled trapezoid, a parallelogram, a rectangle, a square, or an octagon.

[0015] The bearing journals, with their bearing journal positioning and guide surfaces, are arranged within an adjustment range located between an inner limiting edge on the support ring and a vertical support surface or a support ramp of a support and adjustment ring. Within this adjustment range, the bearing journals of the axle bolt can be repositioned and rearranged into several bearing positions. The toothed profile pressure rollers are also adjusted via their axle bolts in their respective radial positions on the metal part into whose wall toothed profiles are to be formed.

[0016] Additional features of the invention are specified in claims 2 to 5. They relate to • the formation of different cross-sectional shapes of bearing journals according to the number of radial adjustment positions of the tooth profile pressure rollers, • the dimensioning of the radial adjustment positions and • the marking of the respective production-effective setting positions of the tooth profile pressure rollers on metal parts, which are, for example, lamellar carriers.

[0017] The invention is simplified in the figures and explained in more detail in the following part of the description as an exemplary embodiment with partial views of several bearing journal designs.

[0018] It is shown in Fig. 1: A toothed profile pressure roller bearing of the forming tool in section, Fig. 2: a top view Fig. 1 on average, Fig. 3 to Fig. 6: Partial views of the bearing journal formations shown in the direction of the axle bolt center axis, Fig. 7: a 3D partial view of the mounting rings for the tooth profile pressure rollers, Fig. 8: a 3D view of the receiving and positioning rings of the forming tool for the tooth profile pressing rollers.

[0019] The figures show all functional design features of the forming tool with positioned toothed profile pressure rollers 10, which make it possible to achieve repeatable adjustment and positioning of the toothed profile pressure rollers 10 in their different radial working positions according to the target dimension specifications for intermediate and final working positions or in the case of changing material forming behavior of the pot-shaped and hollow cylindrical metal parts by repositioning and repositioning the axle bolts 12 via their two bearing pins 14 without a necessary assortment of supplementary exchange adjustment elements.

[0020] In Fig. 1 to Fig. Figure 6 shows that the adjusting elements for achieving the radial adjusting positions of the tooth profile pressure rollers 10, which are rotatably mounted on an axle bolt 12, - in Fig. 1 and Fig. 3 bearing pins 14, in cross-sectional form as a right-angled trapezoid, in up to three bearing positions 15 and radial adjustment positions 1, 2, 3, - in Fig. 4 bearing pins 14, in cross-sectional form as a parallelogram, in two bearing positions 15 and radial adjustment positions 1 and 2, - in Fig. 5 bearing pins 14, in the cross-sectional shape as a square, in up to four bearing positions 15 and radial adjustment positions 1, 2, 3 and 4 as well as - in Fig. 6 bearing pins 14, in cross-sectional form as an octagon in up to eight bearing positions 15 and radial adjustment positions 1 to 8, can be reached, adjusted and modified by simply flipping and repositioning them by a tilting and repositioning angle 18, for example by 180°, 90° or 45°, the adjacent adjustment positions of the tooth profile pressure rollers 10 being radially offset.

[0021] As in Fig. As shown in Figure 2, the radial adjustment range 11 of the toothed profile pressure rollers 10 is defined by the range of bearing positions 15 that the bearing journals 14 on both sides can occupy. The bearing journals 14 are held axially between a lower support ring 24 and an upper cover ring 25 by their flat and parallel bearing journal positioning and guiding surfaces 17 and an adjusting chamfer 16, and radially abut the support and adjusting ring 20 by means of the support chamfer 22 or the support surface 21. The radial adjustment range of the bearing journals is limited, inwards, by an inner limiting edge 27 on the support ring 24.

[0022] In Fig. 3 to Fig. Figure 6 shows exemplary arrangements of the setting position indicators 9 on the end faces of the bearing journals 14, which provide information about the bearing position 15 to be selected, with reference to the axle bolt center axis 13, as well as about the applicable radial setting positions 1 to 8 of the tooth profile pressure rollers 10.

[0023] From the in Fig. The ring assembly shown in Figure 8, consisting of a lower support ring 24, a support and adjustment ring 20, and an upper cover ring 24, with optional intermediate adjustment rings 23 that can be inserted between them, is, during the folding and repositioning of the bearing journals 14, the upper cover ring 24, as shown in Figure 8, Fig. Figure 7 shows the ring receiving body 26, which has been opened in the meantime. After adjustment to any other bearing position 15, the bearing journals also provide repeatable axle bolt bearings for the toothed profile pressure rollers 10. Reference symbol list 1 radial adjustment position out of 10 2 radial adjustment positions out of 10 3 radial adjustment positions out of 10 4 radial adjustment positions out of 10 5 radial adjustment positions out of 10 6 radial adjustment positions out of 10 7 radial adjustment positions out of 10 8 radial adjustment positions out of 10 9 setting position display(s) out of 10 10 (disc-shaped) toothed profile pressure rollers 11 Adjustment range of 10 12 axle bolts for 10 13 axle bolts - center axle 14 bearing journals on 12 15 of 14 storage positions 16 Adjustment angle at 14 17 (parallel and planar) bearing journal positioning and guide surfaces 18 tilt and repositioning angles 19 (vertical) adjustment surfaces on 14 20 support and adjustment rings for 14 21 support surface in 20 22 support slope in 20 23 Adjustment spacer rings 24 support ring 25 Cover ring 26 ring mounting bodies for 20 and 23 to 25 27 (inner) boundary edge of 11, at 24

Claims

[1] Forming tool with positioned tooth profile press rollers (10) for forming longitudinal teeth into the walls of cup-shaped and hollow cylindrical metal parts mounted on receiving bolts and forming dies in different radial working positions, which require repeatably adjusted radial setting positions (1 to 8) of the tooth profile press rollers (10), that each of the disc-shaped toothed profile pressure rollers (10) rotatable about a cylindrical axle bolt (12) and the bearing journals (14) arranged on both sides of each axle bolt (12) with their flat and parallel bearing journal positioning and guiding surfaces (17), axially positioned between a lower support ring (24) and an upper cover ring (25) and radially abutting a support and adjusting ring (20), form a functional combination of a roller sliding bearing with two radially stepped adjustable support bearings and that the two bearing journals (14) have an identical polygonal cross-sectional shape as mirror images, which can optionally be described as • right-angled trapezoid, • Parallelogram, • Rectangle, • square or as • Octagon is formed and with its bearing pin positioning and guide surfaces (17) in an adjustment area (11) which is arranged between an inner limiting edge (27) on the support ring (24) and a vertical support surface (21) or a support ramp (22) of a support and adjustment ring (20) and is moved and repositioned into several bearing positions (15) of the bearing pins (14), the tooth profile pressure rollers (10) are adjusted in the radial adjustment positions (1 to 8) on the metal part. [2] Forming tool with positioned tooth profile pressure rollers (10) according to claim 1, characterized by , that each tooth profile pressure roller (10) is supported via its axle bolt (12) and via the bearing pins (14) on the axle bolt (12) against a support and adjustment ring (20) and is received in a covered ring receiving body (26) and with bearing pins (14) in the cross-sectional shape • right-angled trapezoid with an adjustment ramp (16) optionally without one, with one or with two adjustment intermediate rings (23) arranged together above or below the support and adjustment ring (20) one, two or three radial adjustment positions (1, 2, 3) • Parallelogram with two adjusting ramps (16) whose distances to the axle bolt center axis (13) are unequal, offset by a tilting and repositioning angle (18) after a flip or repositioning, two radial adjustment positions (1 and 2) • Rectangle and square with four vertical adjustment surfaces (19), whose distances to the axle bolt center axis (13) are unequal, offset by a tilting and repositioning angle (18) after four repositionings or repositionings, four radial adjustment positions (1, 2, 3 and 4) • Octagon with eight vertical adjustment surfaces (19) whose distances to the axle bolt center axis (13) are unequal, offset by a tilting and repositioning angle (18) after eight repositionings or repositionings, eight radial adjustment positions (1 to 8) the tooth profile pressure rollers (10) via their axle bolt center axes (13) during an interim lifting and unlifting of the cover ring (25) from the bearing pins (14) of the axle bolts (12) from the ring receiving body (26) are possible. [3] Forming tool with positioned tooth profile pressure rollers (10) according to claims 1 and 2, characterized by , that • the number and • the distances between the radial adjustment positions (1 to 8) as well as • the size of the entire adjustment range (11) the tooth profile pressure rollers (10) over • the angular position of the adjusting ramps (16) on the bearing journals (14) and • the different distances of the vertical adjustment surfaces (19) on the bearing journals (14) from the axle bolt center axes (13) are determined by target dimension specifications for the radial intermediate and final working positions of the tooth profile pressure rollers (10) and the material forming behavior. [4] Forming tool with positioned tooth profile pressure rollers (10) according to claims 1 to 3, characterized by , that setting position indicators (9) for marking the applicable radial setting positions (1 to 8) of the tooth profile pressure rollers (10) are provided on the end faces of the bearing journals (14) or on the bearing journal positioning and guiding surfaces (17) of the bearing journals (14). [5] Forming tool with positioned tooth profile pressure rollers (10) according to claims 1 to 4, characterized by , that the metal parts into which longitudinal teeth are formed with tooth profile pressure rollers (10) in repeatably adjusted radial setting positions (1 to 8) are lamellar carriers.

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