EP4323132A1 - Verfahren zur herstellung eines ein verzahnungsprofil aufweisenden bauteils; sowie werkzeugvorrichtung - Google Patents
Verfahren zur herstellung eines ein verzahnungsprofil aufweisenden bauteils; sowie werkzeugvorrichtungInfo
- Publication number
- EP4323132A1 EP4323132A1 EP22713861.7A EP22713861A EP4323132A1 EP 4323132 A1 EP4323132 A1 EP 4323132A1 EP 22713861 A EP22713861 A EP 22713861A EP 4323132 A1 EP4323132 A1 EP 4323132A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- press part
- component blank
- tool device
- rotary body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
- B21K1/767—Toothed racks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H5/00—Making gear wheels, racks, spline shafts or worms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
- B21J9/022—Special design or construction multi-stage forging presses
Definitions
- the invention relates to a method for producing a component/transmission component having a toothed profile, preferably a toothed rack.
- the component is further preferably designed as a steering rod placed in a motor vehicle (for example in a steering gear).
- a method for producing a component having a toothed profile wherein in a first step a) a component blank is placed in a holder of a tool device for absorbing a pressing force when a press part of the tool device moves in a vertical displacement direction, and in a second step b) the toothing profile is pressed into the component blank using a rotating body coupled to the press part via a connecting rod (in the sense of a connecting rod/a connecting rod), where the rotating body during the movement of the press part in the displacement direction in the direction of the component blank is pressed and rolls along the component blank so that the toothed profile is formed.
- the object of a tool device is achieved by the subject matter of claim 9, wherein the claimed tool device is designed to produce a component having a toothed profile and a vertically displaceable press part, a holder prepared for receiving a component blank, a rotary body and a den
- the rotary body has a link rod that couples the rotary body to the press part, the link rod connecting the rotary body to the press part in such a way that when the press part is moved vertically to form the toothing profile, the rotary body is pressed in the direction of the component blank and attaches to the component blank / an outer circumference of the Component blank rolls along.
- Such a production of the toothed profile means that as few components as possible are required for the finished shaping of the component. On the one hand, this significantly simplifies the structure of the tool device and, on the other hand, the manufacturing process is implemented as efficiently as possible. In particular, in order to implement different toothings, preferably only the rotating body needs to be exchanged.
- the rotating body (preferably on its radial outside) directly has a negative form of the toothed profile. This further simplifies the structure, with the toothed profile being pressed into the component blank by the direct pressing of the rotating body against the component blank.
- the tool device is implemented as a progressive tool/a progressive press. As a result, particularly precise tooth profiles are formed.
- the stepped tool is designed in such a way that the toothing profile is formed in several steps, the production efficiency is increased. Accordingly, it is also advantageous if the toothed profile is formed in a plurality of cold forming stages, each cold forming stage having a rotary body coupled to the press part via an articulated rod. This further increases manufacturing efficiency.
- the rotary bodies of the various cold forming stages differ in terms of a toothing diameter and/or a toothing depth.
- the rotary body can roll along the component blank with as little wear as possible.
- the component blank (with respect to its longitudinal axis) is used in the first step a) at an angle of between 20° and 50°, preferably between 25° and 35°, approximately 30°, relative to a horizontal plane . That horizontal plane is in turn perpendicular to the vertical displacement direction of the press part. This results in the most wear-resistant mounting of the rotating body on the connecting rod.
- the rotating body is guided in its rolling movement in a housing which is further preferably connected to a base accommodating the holder. This results in a robust bearing of the rota tion body.
- the rotating body is connected to the connecting rod by means of a bearing shaft and/or is guided in the housing (preferably at an angle to the vertical displacement direction of the press part).
- the rotational body which is preferably implemented as a roller, has the negative shape of the toothed profile on only part of its outer circumference, it can be supported as robustly as possible. More preferably, the body of revolution is designed to form irregular toothed profiles.
- a cold-formed toothed rack is preferably produced in a multi-stage tool, with the toothing profile being produced by the rolling of a shaping roller (rotary body), and with the vertical movement of the press (press part) being controlled by a connecting rod (articulated rod) according to the invention. is converted into a rolling motion. There is thus a profile that is unrolled by a roller, so that the profile is pressed into the workpiece, the roller being moved via a kind of connecting rod.
- FIG. 1 shows a side view of a partially illustrated tool device designed and used according to the invention according to a preferred exemplary embodiment, with a rotary body used in the tool device and a connecting rod coupling this rotary body to a vertically displaceable press part being clearly visible,
- FIG. 2 shows a perspective detailed representation of the machine tool according to FIG. 1 in the area of the rotary body and a component blank to be machined with the aid of the rotary body,
- Fig. 3 is a perspective view of a toothed rack produced by means of the tool device according to FIG.
- FIG. 4 shows a schematic flow chart for the implementation of a fastening method according to the invention using the tool device according to FIG. 1.
- FIG. 3 shows a component 10 in the form of a toothed rack that has been completely manufactured using the method according to the invention.
- the component 10 is implemented specifically as a steering rod and is therefore preferably used in a steering system of a motor vehicle.
- the component 10 is also implemented as another component 10 embodied with a toothed profile 5, for example as a gear wheel.
- the finished component 10 has a toothed profile 5 in a longitudinal section due to its design as a toothed rack, which is shown in this FIG. 3 as helical toothing.
- the tooth profile 5 is shown as a spur tooth system, with a wide variety of gears/tooth profiles 5, preferably also irregular tooth profiles 5, being able to be implemented using the manufacturing process described below.
- a tool device 4 designed to implement the method according to the invention is illustrated, by means of which the component 10 according to FIG. 3 can be produced.
- the tool device 4 is realized as a step tool/ei ne step press. A manufacturing stage can be clearly seen in FIG.
- the tool device 4 has a base 14 which defines a horizontal plane 12 / extends in this horizontal plane 12 .
- a press part 3 is movable in a vertical displacement direction V, i.e. perpendicular to the horizontal plane 12.
- V vertical displacement direction
- a holder 2 designed to support a pressing force transmitted by the press part 3 is accommodated on the base 14 .
- the holder 2 is also designed in such a way that a component blank 1 to be manufactured (here in the form of a rack blank) can be clamped at an angle to the displacement direction V and is also already clamped in this position in FIG.
- a component blank 1 to be manufactured here in the form of a rack blank
- clamped th state of the component blank 1 is this component blank 1 with respect to its Longitudinal axis 15 at an angle 11 of 30 ° relative to the horizontal plane 12 inclined clamped / used.
- a rotary body 7 having a negative form 6 of the toothed profile 5 is provided in the form of a roller.
- the rotating body 7 is rotatably supported at one end of a connecting rod 8 used according to a connecting rod.
- the link rod 8 serves to couple the movement of the rotary body 7 to the press part 3 . Accordingly, the link rod 8 is rotatably attached to the press part 3 with its end facing away from the rotary body 7 .
- the rotary body 7 is along a longitudinal axis 15 of the clamped component blank 1 in a housing 9 of the tool device 4 slidably ge leads.
- the rotating body 7 is accommodated on a bearing shaft 13 .
- This bearing shaft 13 is guided in the housing 9 with its areas protruding from the rotary body 7 and is also mounted on the connecting rod 8 .
- the articulated rod 8 is designed with two arms and one arm is mounted on the bearing shaft 13 on either side of the rotary body 7 .
- the rotary body 7 is held on the press part 3 via the connecting rod 8 in such a way that a vertical displacement movement of the press part 3 (movement along the displacement direction V) results in a direct pressing/pressing of the rotary body 7 with its negative mold 6 (also known as a negative profile referred) to / comes into the component blank 1 and thus the Verzah voltage profile 5 is pressed cold-forming.
- the rotating body 7 rolls along the displacement direction V along the component blank 1 during the movement of the press part 3 .
- a method according to the invention is illustrated schematically in FIG.
- a first step a the component blank 1 is clamped/inserted into the holder 2 .
- a second step b the tooth profile 5 on the already described manner formed.
- the toothed profile 5 is formed by moving the press part 3 towards the component blank 1 and thus by pressing the rotary body 7 into the component blank 1 .
- the toothed profile 5 is preferably formed in several individual manufacturing stages/cold forming stages.
- rotating bodies 7 of different dimensions are preferably used at several stations/cold forming stages (located behind or in front of the plane of the drawing in FIG.
- the toothed profile 5 is preferably produced with a first depth and in at least one further, second step the toothed profile 5 is further produced with a second depth formed / manufactured. Accordingly, any number of cold forming stages can be realized until finally the component 10 according to FIG. 3 is completed and is removed from the tool device 4 in a step c).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021109639.1A DE102021109639B3 (de) | 2021-04-16 | 2021-04-16 | Verfahren zur Herstellung eines ein Verzahnungsprofil aufweisenden Bauteils; sowie Werkzeugvorrichtung |
| PCT/DE2022/100204 WO2022218462A1 (de) | 2021-04-16 | 2022-03-16 | Verfahren zur herstellung eines ein verzahnungsprofil aufweisenden bauteils; sowie werkzeugvorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4323132A1 true EP4323132A1 (de) | 2024-02-21 |
| EP4323132B1 EP4323132B1 (de) | 2025-03-12 |
Family
ID=80999821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22713861.7A Active EP4323132B1 (de) | 2021-04-16 | 2022-03-16 | Verfahren zur herstellung eines ein verzahnungsprofil aufweisenden bauteils; sowie werkzeugvorrichtung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240367218A1 (de) |
| EP (1) | EP4323132B1 (de) |
| JP (1) | JP7686779B2 (de) |
| CN (1) | CN117157157A (de) |
| DE (1) | DE102021109639B3 (de) |
| WO (1) | WO2022218462A1 (de) |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US716241A (en) | 1901-10-05 | 1902-12-16 | William L Jones | Machine for rolling gears. |
| US2782663A (en) | 1955-09-01 | 1957-02-26 | Gen Motors Corp | Cold forming apparatus |
| US3121352A (en) | 1961-05-18 | 1964-02-18 | Michigan Tool Co | Tooth forming method and apparatus |
| SU390857A1 (ru) * | 1972-05-03 | 1973-07-25 | Устройство для накатывания канавок | |
| US4322961A (en) * | 1980-02-26 | 1982-04-06 | Kinefac Corp. | Die rolling machine |
| JPS59110444A (ja) * | 1982-12-16 | 1984-06-26 | Toyota Motor Corp | ラツク歯の仕上転造法 |
| DE3817680A1 (de) * | 1988-05-25 | 1989-12-07 | Hilti Ag | Umformungsverfahren fuer werkzeuge |
| CH687597A5 (de) * | 1993-02-25 | 1997-01-15 | Grob Ernst Fa | Verfahren zur Zahnstangenherstellung, danach hergestellte Zahnstange und Vorrichtung zur Verfahrensdurchfuehrung. |
| JPH08155575A (ja) * | 1994-11-30 | 1996-06-18 | Showa:Kk | ラック軸の製造方法 |
| JP3690631B2 (ja) * | 1997-02-25 | 2005-08-31 | 光洋精工株式会社 | ラック軸の製造方法及び装置 |
| US6000267A (en) | 1997-02-25 | 1999-12-14 | Koyo Seiko Co., Ltd. | Process for fabrication of rack shaft and fabrication machine therefor |
| CN1796033A (zh) * | 2004-12-21 | 2006-07-05 | 睦茗精密齿轮股份有限公司 | 蜗杆的成型刀具及其应用 |
| JP4852922B2 (ja) * | 2005-07-26 | 2012-01-11 | 株式会社ジェイテクト | ラック軸の製造方法 |
| DE102008019437A1 (de) * | 2008-04-17 | 2009-10-22 | Gottfried Wilhelm Leibniz Universität Hannover | Vorrichtung und spanloses Umformungsverfahren zum Einbringen eines Außenprofils in ein Werkstück |
| CN202752702U (zh) * | 2012-07-13 | 2013-02-27 | 睦茗精密齿轮股份有限公司 | 制造齿形轮盘的滚齿刀切削设备 |
| CN103752953B (zh) * | 2014-01-15 | 2015-12-30 | 重庆大学 | 一种离散式滚压齿轮加工方法 |
| JP6408819B2 (ja) * | 2014-07-28 | 2018-10-17 | 高周波熱錬株式会社 | 中空ラックバーの製造方法 |
| DE102016212308B4 (de) * | 2016-07-06 | 2018-02-22 | Thyssenkrupp Ag | Verfahren zur Herstellung einer Zahnstange für ein Lenkgetriebe eines Kraftfahrzeugs, sowie Zahnstange |
| DE102016212304B4 (de) | 2016-07-06 | 2018-02-22 | Thyssenkrupp Ag | Verfahren zur Herstellung einer Zahnstange für ein Lenkgetriebe eines Kraftfahrzeugs, sowie Zahnstange |
| CN109759527B (zh) * | 2019-03-05 | 2020-07-10 | 西安交通大学 | 一种大直径齿形件多道次同时滚轧模具及滚轧方法 |
| CN211387226U (zh) * | 2020-01-10 | 2020-09-01 | 诸暨宝锐齿轮有限公司 | 一种结构改进的内齿轮加工装置 |
-
2021
- 2021-04-16 DE DE102021109639.1A patent/DE102021109639B3/de active Active
-
2022
- 2022-03-16 US US18/287,050 patent/US20240367218A1/en active Pending
- 2022-03-16 JP JP2023562976A patent/JP7686779B2/ja active Active
- 2022-03-16 WO PCT/DE2022/100204 patent/WO2022218462A1/de not_active Ceased
- 2022-03-16 CN CN202280026717.6A patent/CN117157157A/zh active Pending
- 2022-03-16 EP EP22713861.7A patent/EP4323132B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022218462A1 (de) | 2022-10-20 |
| CN117157157A (zh) | 2023-12-01 |
| JP2024516799A (ja) | 2024-04-17 |
| US20240367218A1 (en) | 2024-11-07 |
| JP7686779B2 (ja) | 2025-06-02 |
| EP4323132B1 (de) | 2025-03-12 |
| DE102021109639B3 (de) | 2022-08-25 |
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