EP1784282A1 - 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

Info

Publication number
EP1784282A1
EP1784282A1 EP05762982A EP05762982A EP1784282A1 EP 1784282 A1 EP1784282 A1 EP 1784282A1 EP 05762982 A EP05762982 A EP 05762982A EP 05762982 A EP05762982 A EP 05762982A EP 1784282 A1 EP1784282 A1 EP 1784282A1
Authority
EP
European Patent Office
Prior art keywords
stage
grinding
grinding wheel
workpieces
thread
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
Application number
EP05762982A
Other languages
German (de)
English (en)
Other versions
EP1784282B1 (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

Links

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 the generation of external or internal ball threads on workpieces, in particular ball screw rods or ball screw nuts for motor vehicle steering systems, having an abrasive body whose outside contour is adapted to the ball thread to be produced. 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.
  • CH 538 332 describes a method and a device for producing taps with metrical threads.
  • the grinding wheel has two grinding regions, namely a smooth, cylindric region for grinding the outer diameter of the thread and a profiled region for grinding the profile of the thread on the workpiece.
  • the profiled area is moreover divided into two different sections with different diameters.
  • the method described there can never be transferred to the production of ball screws, since ball screw grinding requires considerably greater penetration depths and thus correspondingly increased chip removal rates.
  • 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 finishing and the other stage the finishing of the ball thread to be generated.
  • This design of the grinding wheel makes it possible to produce both an external and an internal thread in one pass and with a single grinding wheel, it also being possible to grind into the full, hard material without any problems.
  • 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.
  • the grinding body has three stages, with a second stage having a larger diameter than the first stage and has a smaller diameter than the further, third stage.
  • a further significant improvement in the quality of the surface of the thread produced can be achieved if the steps have different grits, the step serving to finish the workpieces having a finer grain size than the step used for pre-machining the workpieces.
  • the abrasive body has a main body which is electroplated with cubic boron nitride as an abrasive.
  • a grinding wheel formed in this way advantageously does not have to be reworked or dressed during manufacture, but can be used over a long period of time, which additionally increases its productivity.
  • the base body consists of metal.
  • a method according to the invention for producing outer or inner ball threads on workpieces can be found in the features of claim 6.
  • Such a method allows a considerably simpler working sequence when producing workpieces with external or internal ball threads, since neither the workpieces nor the grinding wheel have to be re-clamped and the machining requires only minimal machine and system investment.
  • it may be expedient, instead of an idle stroke during the return movement, to guide it over the workpiece a second time with a considerably lower infeed in order in this way to improve the surface quality and, if necessary, to increase the height. here to achieve dimensional accuracy.
  • An additional straightening of the workpieces can be saved if the workpiece is hardened before the grinding operation.
  • the grinding wheel is set for machining by the pitch angle of the thread against the central axis of the workpiece.
  • FIG. 2 shows a ball screw rod produced by means of a grinding wheel according to FIG. 1 according to the method of the invention
  • FIG. 3 shows a grinding wheel according to the invention for producing internal ball threads
  • FIG. 4 shows a ball screw nut produced with a grinding wheel according to FIG. 3 by the method according to the invention.
  • Fig. 1 shows a grinding wheel 1, which serves to Bear ⁇ processing 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 the present 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 a grinding body 4, which in the illustrated embodiment has three steps 5 which are adapted to the profile of the ball thread 3 to be produced and which project each other as projections from the grinding body 4 , 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
  • the third step 7 a cutting depth of 0.2 mm.
  • the diameter of the third stage 7 is 0.4 mm greater than that of the second stage 6 and larger by 2 mm than that of the first stage 5.
  • the finishing step of the workpieces 2 serving third stage 7 has a finer grain size than the second stage 6 and the second stage 6 again has a finer grain size auf ⁇ has as for pre-processing
  • the first stage 5 can have a grain size of 60
  • the second stage 6 a grain size of 150
  • the third stage 7 a grain size of. 250 have.
  • the above-mentioned values with regard to the diameter and the granulation of the individual stages 5, 6 and 7 are to be regarded as exemplary only and can in some cases be raised, in particular with different diameters of the workpieces 2 and / or with different thread depths. vary.
  • the grinding body 4 of the grinding wheel 1 has a base body 9 consisting of a metal, preferably of steel, which is coated with a grinding agent 10 indicated by a dotted line.
  • the abrasive used here is cubic boron nitride, which is connected to the base body 9 by a galvanic bond.
  • 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 er ⁇ follows 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, the of the previous stage 5 or 6 not wur ⁇ de. Furthermore, the workpiece 2 is hardened before the grinding process in order to be able to dispense with later straightening of the same.
  • FIG. 2 shows 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, when using the ball-and-socket threaded rod, are provided with a coupling shown in FIG. gel threaded nut 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 Vorbear ⁇ processing stage 5 and the third, for Fertigbe ⁇ processing of the workpieces 2 serving stage 7 has. Furthermore, it can be seen that the two stages 5 and 7 are formed by individual discs or grinding bodies 4 joined together to form the grinding wheel 1.
  • the work piece 2 to be machined with this grinding wheel 1 is a ball screw nut, in the bore 12 of which the thread 8 of the ball screw 3, not shown in this case, is inserted.
  • the grinding wheel 1 Before the workpiece 2 is machined by means of the grinding wheel 1, preferably a mechanical, in particular machining pre-machining of the thread 8, for example by means of a Drehbear ⁇ processing, because due to the smaller diameter of the grinding wheel 1 only a lower Zerspanungs ⁇ performance than when grinding from the outside Ball threads can be achieved.
  • a mechanical, in particular machining pre-machining of the thread 8 for example by means of a Drehbear ⁇ processing
  • the same can be guided a second time with a lower infeed over the workpiece 2, in order to achieve improved surface quality and a higher dimensional accuracy.
  • 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.

Abstract

L'invention concerne une meule (1) servant à produire des filetages à billes mâles ou femelles (3) sur des pièces à usiner (2), notamment sur des tiges ou des écrous à filetage à billes pour des directions de véhicules automobiles. La meule selon l'invention comprend un corps abrasif (4) dont le contour extérieur est adapté au filetage à billes (3) à produire. Ce corps abrasif (4) comprend au moins deux étages (5, 7) adaptés au filetage à billes (3) à produire : un premier étage (5) a un diamètre inférieur et sert au préusinage des pièces à usiner (2) et un autre étage (7) a un diamètre supérieur et sert au finissage des pièces à usiner (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 true EP1784282A1 (fr) 2007-05-16
EP1784282B1 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
ITUA20163255A1 (it) * 2016-05-09 2017-11-09 Umbragroup S P A Mola per la rettifica di profili ad elica

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI613285B (zh) 2010-09-03 2018-02-01 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
US9102039B2 (en) 2012-12-31 2015-08-11 Saint-Gobain Abrasives, Inc. Bonded abrasive article and method of grinding
CN104994996B (zh) 2012-12-31 2017-12-05 圣戈班磨料磨具有限公司 粘结研磨制品和碾磨方法
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
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
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
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

Family Cites Families (5)

* 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
US4930265A (en) * 1984-08-28 1990-06-05 Schaudt Maschinenbau Gmbh Thread grinding method and machine
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006008258A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20163255A1 (it) * 2016-05-09 2017-11-09 Umbragroup S P A Mola per la rettifica di profili ad elica
EP3243601A1 (fr) * 2016-05-09 2017-11-15 Umbra Cuscinetti S.p.A. Roule de moulage pour la rectification de profils de forme spirale

Also Published As

Publication number Publication date
PL1784282T3 (pl) 2013-03-29
WO2006008258A1 (fr) 2006-01-26
EP1784282B1 (fr) 2012-10-17
DE102004034542A1 (de) 2006-02-16

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