EP1784282B1 - Meule pour produire des filetages a billes males ou femelles sur des pieces a usiner - Google Patents

Meule pour produire des filetages a billes males ou femelles sur des pieces a usiner Download PDF

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Publication number
EP1784282B1
EP1784282B1 EP05762982A EP05762982A EP1784282B1 EP 1784282 B1 EP1784282 B1 EP 1784282B1 EP 05762982 A EP05762982 A EP 05762982A EP 05762982 A EP05762982 A EP 05762982A EP 1784282 B1 EP1784282 B1 EP 1784282B1
Authority
EP
European Patent Office
Prior art keywords
grinding
workpieces
ball screw
grinding wheel
workpiece
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.)
Not-in-force
Application number
EP05762982A
Other languages
German (de)
English (en)
Other versions
EP1784282A1 (fr
Inventor
Paul LEINMÜLLER
Werner Kolb
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch Automotive Steering GmbH
Original Assignee
ZF Lenksysteme GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZF Lenksysteme GmbH filed Critical ZF Lenksysteme GmbH
Priority to PL05762982T priority Critical patent/PL1784282T3/pl
Publication of EP1784282A1 publication Critical patent/EP1784282A1/fr
Application granted granted Critical
Publication of EP1784282B1 publication Critical patent/EP1784282B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B24B19/022—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for helicoidal grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor

Definitions

  • the invention relates to a grinding wheel for producing external or internal ball threads on workpieces, in particular ball screw rods or ball screw nuts for motor vehicle steering systems, with an abrasive body whose outer contour is adapted to the ball screw to be generated. Furthermore, the invention relates to a method for producing external or internal ball threads on workpieces, in particular on ball screw rods or ball screw nuts for motor vehicle steering systems.
  • the CH 538 332 describes a method and apparatus for making taps with metric threads.
  • the grinding wheel has two grinding areas, namely a smooth, cylindrical area for grinding the outer diameter of the thread and a profiled area for grinding the profile of the thread on the workpiece.
  • the profiled area is also divided into two different sections with different diameters.
  • the method described there can not be transferred to the production of ball screws, since the ballscrews significantly greater penetration depths and thus correspondingly increased cutting performance are required.
  • the workpiece before machining for example by turning, pre-work.
  • a device for grinding screw threads is in the GB 398 519 A described.
  • two structurally separate grinding wheels are provided, one of which is a coarse and soft and the other is made of a hard and fine material.
  • the disadvantage here is the high cost of the two physically separate grinding wheels.
  • the grinding wheel of the grinding wheel according to the invention has at least two stages with different diameters, of which one stage takes over the pre-and the other stage, the finishing of the ball screw to be generated.
  • This structure of the grinding wheel it is possible to produce both a Au- ⁇ en and an internal thread in a single pass and with a single grinding wheel, and it is also easily possible to grind into the full, hard material.
  • both external and internal ball screw can be produced in a much shorter processing time, which allows shorter cycle times and thus ultimately a cost-effective end product with better market opportunities.
  • a further significant improvement in the quality of the surface of the thread produced is achieved by in that the steps have different grits, the step serving for finishing the workpieces having a finer grain size than the step serving for pre-machining the workpieces.
  • the invention provides that the abrasive body has a base body which is covered with cubic boron nitride as an abrasive by a galvanic or ceramic bond.
  • a trained grinding wheel must advantageously not be reworked or dressed during manufacture, but can be used over a long period of time, which additionally increases their productivity.
  • the base body consists of metal.
  • a method according to the invention for producing Au- ⁇ en or internal ball threads on workpieces can be found in the features of claim 4.
  • the grinding wheel is employed for machining by the pitch angle of the thread against the central axis of the workpiece.
  • Fig. 1 shows a grinding wheel 1, which serves for machining a workpiece 2.
  • the workpiece 2 is a ball screw rod which is intended for use in motor vehicle steering systems.
  • a ball screw 3 in this case an external ball screw, is produced on the workpiece 2, for which purpose the grinding wheel 1 can be attached to a grinding machine (not shown).
  • the grinding wheel 1 according to Fig. 1 has an abrasive body 4, which in the illustrated embodiment has three adapted to the profile of the ball screw 3 to be generated, each projecting as protrusions of the grinding wheel 4, arranged side by side stages 5, 6 and 7.
  • the first stage 5 has the smallest diameter and is used for pre-machining of the workpieces 2.
  • the first Stage 5 in the direction of feed "A" following second stage 6 has a larger diameter than the first stage 5 and the third stage 7 has the largest diameter of the three stages 5, 6 and 7 and is used for finishing the workpieces. 2
  • the first step 5 can have a cutting depth of 2 mm, the second step 6 a cutting depth of 0.8 mm and the third step 7 a cutting depth of 0.2 mm.
  • the diameter of the third stage 7 is 0.4 mm larger than that of the second stage 6 and 2 mm larger than that of the first stage 5.
  • the three stages 5, 6 and 7 have different grits, wherein the finishing of the workpieces 2 serving, third stage 7 has a finer grain size than the second stage 6 and the second stage 6 in turn has a finer grain than the preprocessing of the workpieces 2 serving first stage first
  • the first stage 5 may have a grain size of 60
  • the second stage 6 a grain size of 150
  • the third stage 7 a grain size of 250.
  • the above-mentioned values with respect to the diameter and the granulation of the individual stages 5, 6 and 7 are to be regarded as exemplary only and may in some cases considerably at different diameters of the workpieces 2 and / or at different thread depths vary.
  • the grinding body 4 of the grinding wheel 1 has a basic body 9 consisting of a metal, preferably of steel, which is covered with an abrasive 10 indicated by a dotted line.
  • an abrasive 10 here cubic boron nitride is used, which is connected by a galvanic bond to the base body 9.
  • a ceramic bond may be used, in which case, in contrast to a galvanic bond, a dressing of the grinding wheel 1 during grinding is required.
  • the thread 8 is not mechanically preprocessed prior to grinding, i. the processing by means of the grinding wheel 1 takes place into the full material, wherein the three stages 5, 6 and 7 engage in succession and the subsequent stages 6 and 7 only have to machine that part of the thread 8 to be produced, that of the preceding stage 5 or 6 was not machined. Furthermore, the workpiece 2 is hardened prior to grinding to be able to dispense with a subsequent straightening the same.
  • Fig. 2 is the workpiece 2 produced with the grinding wheel 1 using the method described above, that is to say the ball screw rod.
  • a plurality of balls 11 are shown, which in the use of the ball screw rod with an in Fig. 4 shown ball screw nut be used as a workpiece 2.
  • the ball screw 3 has in the present case a very small pitch, for example, a pitch of 7 mm, so that the thread inlet and outlet on the workpiece 2 are correspondingly short.
  • Fig. 3 an alternative embodiment of the grinding wheel 1 is shown, the grinding wheel 4 only two stages, namely the first, serving for pre-processing stage 5 and the third, for finishing the workpieces 2 serving stage 7 has. Furthermore, it can be seen that the two stages 5 and 7 are formed by individual disks or grinding bodies 4 which are combined to form the grinding wheel 1.
  • the workpiece 2 to be machined with this grinding wheel 1 is a ball screw nut in whose bore 12 the thread 8 of the ball screw 3, not shown in this case, is introduced.
  • Fig. 3 is further seen that the grinding wheel 1 is employed for machining the workpiece 2 by the pitch angle ⁇ of the ball screw 3 against the central axis 13 of the workpiece 2.
  • processing of the ball screw rod can be provided, and it is possible in this way to use grinding wheels 1, in which the thread pitch is not corrected. Rather, employed by this angle grinding wheels 1 have exactly the profile to be produced and image in the workpiece 2.
  • Part of the finished ball screw nut is in Fig. 4 shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Claims (8)

  1. Meule pour produire des filetages à billes mâles ou femelles sur des pièces, en particulier sur des tiges filetées à billes ou des écrous filetés à billes pour des directions de véhicules automobiles, comprenant un corps abrasif (4) dont le contour extérieur est adapté au filetage à billes (3) à produire,
    caractérisée en ce que
    le corps abrasif (4) présente au moins deux étages (5, 7) adaptés au filetage à billes (3) à produire, un premier étage (5) présentant un diamètre plus petit et servant au pré-usinage des pièces (2), un autre étage (7) présentant un diamètre plus grand et servant à l'usinage de finition des pièces (2), les étages (5, 7) présentant différents grains, l'étage (7) servant à l'usinage de finition des pièces (2) présentant un grain plus fin que l'étage (5) servant au pré-usinage des pièces (2), et le corps abrasif (4) présentant un corps de base (9) qui est revêtu, par liaison galvanique ou céramique, de nitrure de bore en tant qu'agent abrasif (10).
  2. Meule selon la revendication 1,
    caractérisée en ce que
    le corps abrasif (4) présente trois étages (5, 6, 7), un deuxième étage (6) présentant un plus grand diamètre que le premier étage (5) et un diamètre plus petit que le troisième étage supplémentaire (7).
  3. Meule selon la revendication 1 ou 2,
    caractérisée en ce que
    le corps de base (9) se compose de métal.
  4. Procédé de fabrication de filetages à billes mâles ou femelles sur des pièces, en particulier sur des tiges filetées à billes ou des écrous filetés à billes pour des directions de véhicules automobiles,
    caractérisé en ce
    qu'un filet (8) est pratiqué dans la pièce (2) en un ou deux passages de meulage avec une meule (1) selon l'une quelconque des revendications 1 à 3.
  5. Procédé selon la revendication 4,
    caractérisé en ce que
    le filet (8) n'est pas pré-usiné mécaniquement avant le meulage.
  6. Procédé selon la revendication 4,
    caractérisé en ce que
    le filet (8) est pré-usiné mécaniquement avant le meulage.
  7. Procédé selon la revendication 4, 5 ou 6,
    caractérisé en ce que
    la pièce (2) est durcie avant le meulage.
  8. Procédé selon l'une quelconque des revendications 4 à 7,
    caractérisé en ce que
    la meule (1), en vue de l'usinage, est inclinée suivant l'angle de pas du filetage (3) par rapport à l'axe médian (13) de la pièce (2).
EP05762982A 2004-07-16 2005-07-13 Meule pour produire des filetages a billes males ou femelles sur des pieces a usiner Not-in-force EP1784282B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05762982T PL1784282T3 (pl) 2004-07-16 2005-07-13 Tarcza szlifierska do wytwarzania gwintów zewnętrznych lub wewnętrznych w przedmiotach obrabianych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004034542A DE102004034542A1 (de) 2004-07-16 2004-07-16 Schleifscheibe zur Erzeugung von Außen- oder Innen-Kugelgewinden an Werkstücken
PCT/EP2005/053344 WO2006008258A1 (fr) 2004-07-16 2005-07-13 Meule pour produire des filetages a billes males ou femelles sur des pieces a usiner

Publications (2)

Publication Number Publication Date
EP1784282A1 EP1784282A1 (fr) 2007-05-16
EP1784282B1 true EP1784282B1 (fr) 2012-10-17

Family

ID=34972829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05762982A Not-in-force EP1784282B1 (fr) 2004-07-16 2005-07-13 Meule pour produire des filetages a billes males ou femelles sur des pieces a usiner

Country Status (4)

Country Link
EP (1) EP1784282B1 (fr)
DE (1) DE102004034542A1 (fr)
PL (1) PL1784282T3 (fr)
WO (1) WO2006008258A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111531416A (zh) * 2020-05-12 2020-08-14 成都新成量工具有限公司 锥管丝锥的加工方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI544064B (zh) 2010-09-03 2016-08-01 聖高拜磨料有限公司 粘結的磨料物品及形成方法
DE102011055661B4 (de) 2011-11-24 2022-10-20 Robert Bosch Gmbh VORRICHTUNG ZUM AUßENSCHLEIFEN VON KUGELGEWINDEN
DE102012105295A1 (de) 2012-06-19 2013-12-19 Hans-Hermann Bosch GmbH Verfahren zur Herstellung einer Zahnstange mit einem Kugelgewindeabschnitt
JP6064058B2 (ja) 2012-12-31 2017-01-18 サンーゴバン アブレイシブズ，インコーポレイティド 結合研磨物品および研削方法
US9102039B2 (en) 2012-12-31 2015-08-11 Saint-Gobain Abrasives, Inc. Bonded abrasive article and method of grinding
US9278431B2 (en) 2012-12-31 2016-03-08 Saint-Gobain Abrasives, Inc. Bonded abrasive article and method of grinding
DE112014001102T5 (de) 2013-03-31 2015-11-19 Saint-Gobain Abrasifs Gebundener Schleifartikel und Schleifverfahren
TWI581901B (zh) * 2014-10-22 2017-05-11 全球傳動科技股份有限公司 螺桿的研磨方法
ITUA20163255A1 (it) * 2016-05-09 2017-11-09 Umbragroup S P A Mola per la rettifica di profili ad elica
EP3468737A4 (fr) * 2016-06-13 2020-01-08 Grind Master Machines Pvt. Ltd. Appareil de réalisation d'une opération de finition sur une vis à billes

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163683A (en) * 1984-08-28 1986-03-05 Schaudt Maschinenbau Gmbh Thread grinding method and machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB398519A (en) * 1932-03-07 1933-09-15 Johansson Ab C E Apparatus for grinding screw threads
DE712031C (de) * 1937-08-08 1941-10-10 Herbert Lindner Fa Verfahren zum Schleifen von Gewinde, insbesondere Innengewinde
CH538332A (de) 1970-09-21 1973-06-30 Instr Zd Bolschevik Verfahren und Einrichtung zum Gewindeschleifen
JP3374509B2 (ja) 1994-03-15 2003-02-04 日本精工株式会社 ボールねじナットのサーキット外ボール防止構造

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163683A (en) * 1984-08-28 1986-03-05 Schaudt Maschinenbau Gmbh Thread grinding method and machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111531416A (zh) * 2020-05-12 2020-08-14 成都新成量工具有限公司 锥管丝锥的加工方法

Also Published As

Publication number Publication date
WO2006008258A1 (fr) 2006-01-26
PL1784282T3 (pl) 2013-03-29
EP1784282A1 (fr) 2007-05-16
DE102004034542A1 (de) 2006-02-16

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