EP1991392B1 - Verfahren zum hinterschleifen der schneidzähne von gewindebohrern, gewindeformern und ähnlichen werkzeugen, und schleifmaschine zur durchführung des verfahrens - Google Patents

Verfahren zum hinterschleifen der schneidzähne von gewindebohrern, gewindeformern und ähnlichen werkzeugen, und schleifmaschine zur durchführung des verfahrens Download PDF

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Publication number
EP1991392B1
EP1991392B1 EP07722980A EP07722980A EP1991392B1 EP 1991392 B1 EP1991392 B1 EP 1991392B1 EP 07722980 A EP07722980 A EP 07722980A EP 07722980 A EP07722980 A EP 07722980A EP 1991392 B1 EP1991392 B1 EP 1991392B1
Authority
EP
European Patent Office
Prior art keywords
control
grinding
contour
cutting teeth
tool
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.)
Active
Application number
EP07722980A
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German (de)
English (en)
French (fr)
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EP1991392A1 (de
Inventor
Erwin Junker
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.)
Erwin Junker Maschinenfabrik GmbH
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Erwin Junker Maschinenfabrik GmbH
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Publication of EP1991392A1 publication Critical patent/EP1991392A1/de
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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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/18—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of taps or reamers
    • B24B3/22—Relief cutting of taps or reamers
    • 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
    • B24B17/00—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor
    • B24B17/02—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only
    • B24B17/025—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only for grinding rotating workpieces (three dimensional)
    • 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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/02—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters
    • B24B3/022—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters relief grinding of milling cutters

Definitions

  • the invention relates to a method for back grinding of the cutting teeth of taps, thread formers and similar tools according to the features a to d of claim 1.
  • the term "cutting tooth” should also include the profile former of the thread formers.
  • a device suitable for this purpose in which a control shaft constantly rotates in the same direction.
  • two identically designed control discs are provided with cams.
  • the cams of the two control discs are offset by 180 degrees to each other.
  • At each of the two control discs is located on a Abgriffsrolle, which are coupled together via a parallelogram lever linkage.
  • the scanning movement of the tapping rollers is transmitted via an additional lever linkage to an eccentric mounting of the grinding spindle.
  • the eccentric bearing of the grinding spindle is rotated, so that a rotating grinding wheel rests more or less strongly on the tool to be ground.
  • control discs are placed on the undercut contour of a single cutting tooth. If a tap, thread former or similar tool with a different undercut contour is to be ground, the control disk must be replaced.
  • the control discs are high-precision machine parts that must be machined very accurately and are correspondingly expensive. At the loss of time in the necessary replacement of the control discs thus comes with the disadvantage that a larger number of control discs must be kept in stock.
  • control cams may be formed on the control roller, wherein their number corresponds to the number of cutting teeth on the tool to be ground.
  • a special lifting device is provided.
  • gearbox with change wheels is required, which are to be exchanged as needed against each other.
  • the invention is based on the object to improve the known from the prior art method such that a low-inertia control is possible and that without the time-consuming replacement and costly storage of high-precision control parts, the formation of different relief-contours with different dimensions short processing time is possible.
  • the scanning of the control contour takes place in a rotating oscillatory movement.
  • a scanning is provided with back and forth rotation over a limited circumferential angle of the control contour for each cutting tooth. This oscillating scanning only over a limited section of a smooth and continuous control contour avoids the lifting of a scanning member with the associated risk of rattling or vibration.
  • the selection of the circumferential angle from the entire peripheral region of the control contour represents a first possibility for defining a specific relief or undercut contour for a cutting tooth.
  • Another Design possibility is that the rotational speeds of the rotating scanning movement and the tool are in a certain relationship to each other. For example, a small peripheral portion of the control contour can be scanned slowly, or a larger portion of the peripheral contour can be scanned at an increased rate. Depending on a different undercut contour on the cutting tooth will come about, the undercut contour can be done in one or more passes.
  • the rotational speeds of the rotating scanning movement and of the tool are operationally variable.
  • the operator of a particular grinding machine can therefore select a specific speed ratio before starting production and set his machine accordingly, the speed ratio and the speeds are freely programmable. In this way, multiple variation possibilities for the undercut contour are given with a single control contour in the machine.
  • control contour of the rotational body in the manner of a collective curve comprises the initial values for numerous possible undercut contours. To achieve a certain undercut contour, it is thus only necessary to define a certain peripheral portion of the control contour in which the scan is to take place. For each cutting tooth to be looped, only a rotating reciprocating movement in this selected section of the control contour has to take place.
  • the rotating body can be fixed and with a rotating light source or magnetic on his Scope be scanned.
  • the controlling rotary body is designed as a rotating control disc with an effective as a control contour circumference in the manner of a control comb.
  • Such a control comb is thus a long-drawn control cam, which has stored the various possibilities for the design of the undercut contour (control curve).
  • a limited angle of rotation is selected from the control comb.
  • This control comb can preferably be scanned mechanically, but in principle also optically or electronically.
  • Control signals and / or actuating forces obtained from the scanning movement then determine, via the usual electronic evaluation and control device, the mutual movement of the grinding wheel and the tool in the direction of progression of the cutting teeth towards and away from one another.
  • a direct mechanical transmission is preferred. In this way, the undercut contour of the cutting teeth is set reliably, precisely and quickly.
  • the invention also relates to a grinding machine in the manner of a universal round / non-circular grinding machine for carrying out the method according to claims 1 to 5.
  • a grinding machine is provided, which has the entirety of the features specified in the claim 6 ,
  • a grinding headstock 2 is provided on a machine bed 1, which carries a grinding spindle 3 with a rotating grinding wheel 4.
  • the wheelhead 2 may also be pivotable about a vertical axis.
  • the machine bed 1 also carries a grinding table 5, which in its longitudinal direction - as usual - is adjustable (Z-axis).
  • a movable support member 6 which is additionally adjustable on the grinding table 5 perpendicular to the axis Z, ie in the direction of the usual X-axis.
  • the support member 6 carries the workpiece headstock 7 and the tailstock 8, between which, for example, a tap or a similar tool 9 is clamped.
  • the tool 9, which arises here only, is in this. Case at the same time the workpiece.
  • the tool 9 thus also extends in the Z-axis and is simultaneously rotated about its longitudinal axis, the usual C-axis controlled.
  • the plane of rotation of the grinding wheel 4 is exactly perpendicular to the longitudinal axis of the tool 9. But this need not be so; the already mentioned possibility, the Wheel spindle 2 to rotate about a vertical axis, also allows an oblique hiring the grinding wheel 4 to the tool 9.
  • the grinding table could be made oblique to the axis of the grinding spindle 3. In any case, the grinding wheel extends relative to the tool in the running direction of the resulting cutting teeth 16 and the grooves 17 (FIG. FIG. 3 ).
  • the rotational movements of the tool 9 and the grinding wheel 4 and the feed movement of the grinding wheel 4 are matched to the tool 9, so that the desired movement in the direction of the grooves 17 and cutting teeth 16 is achieved.
  • FIG. 2 explains the principle of control. It is a control disk 11 is provided with a control comb 12 which is rotatably mounted and is offset by a low-inertia high-precision drive in a rotating oscillation movement. The oscillation takes place over a freely selectable, larger or smaller rotation angle, which in FIG. 2 is denoted by ⁇ . In analogy to the usual axis designations during the grinding process, the axis of rotation of the control disk 11 is designated A.
  • the contour of the control comb 12 is scanned by a scanning device 13, which can operate mechanically, optically or electronically and transmits the sampled signal obtained via a signal line 14 to the already mentioned electronic control device 10.
  • a scanning device 13 can operate mechanically, optically or electronically and transmits the sampled signal obtained via a signal line 14 to the already mentioned electronic control device 10.
  • a scanning device 13 can operate mechanically, optically or electronically and transmits the sampled signal obtained via a signal line 14 to the already mentioned electronic control device 10.
  • the changing direction of rotation of the control disk 11 is designated by the direction of rotation arrow 15.
  • a certain angle section ⁇ is first selected from the control comb 12, which best corresponds to the desired undercut contour of the cutting tooth 16.
  • the back grinding of the cutting teeth 16 then takes place synchronously with the scanning of the selected angle range ⁇ on the control comb 12.
  • Another design option is that the sampling can be done at different speeds.
  • a strongly changing undercut contour can be achieved, for example, by scanning a larger angle range ⁇ at a higher speed; as well, a rather "quiet" course of the undercut contour can be achieved by slowing down a smaller section.
  • FIG. 3 again the conditions at the cross section of a tap shown.
  • the cutting teeth 16 interchange with grooves 17, and the undercut is that the backs of the cutting teeth 16 deviate inwardly from an enveloping circular contour 18.
  • the undercut contour numerous variations are possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP07722980A 2006-03-03 2007-02-28 Verfahren zum hinterschleifen der schneidzähne von gewindebohrern, gewindeformern und ähnlichen werkzeugen, und schleifmaschine zur durchführung des verfahrens Active EP1991392B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006009986A DE102006009986B4 (de) 2006-03-03 2006-03-03 Verfahren zum Hinterschleifen der Schneidzähne von Gewindebohrern, Gewindeformern und ähnlichen Werkzeugen, und Schleifmaschine zur Durchführung des Verfahrens
PCT/EP2007/001728 WO2007101593A1 (de) 2006-03-03 2007-02-28 Verfahren zum hinterschleifen der schneidzähne von gewindebohrern, gewindeformern und ähnlichen werkzeugen, und schleifmaschine zur durchführung des verfahrens

Publications (2)

Publication Number Publication Date
EP1991392A1 EP1991392A1 (de) 2008-11-19
EP1991392B1 true EP1991392B1 (de) 2010-05-12

Family

ID=38057436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07722980A Active EP1991392B1 (de) 2006-03-03 2007-02-28 Verfahren zum hinterschleifen der schneidzähne von gewindebohrern, gewindeformern und ähnlichen werkzeugen, und schleifmaschine zur durchführung des verfahrens

Country Status (7)

Country Link
US (1) US8419504B2 (ja)
EP (1) EP1991392B1 (ja)
JP (1) JP5237834B2 (ja)
CN (1) CN101500748B (ja)
DE (2) DE102006009986B4 (ja)
RU (1) RU2397059C2 (ja)
WO (1) WO2007101593A1 (ja)

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DE202007006998U1 (de) 2007-05-15 2008-09-18 Al-Ko Kober Ag Seilzug mit Löseeinrichtung
US20120129434A1 (en) * 2009-09-24 2012-05-24 Gleason Cutting Tools Corporation Tool grinding machine
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
JP2013018063A (ja) * 2011-07-08 2013-01-31 Gre Win Automation Co Ltd 全自動式マイクロドリルの研磨装置及びその研磨方法
US9102039B2 (en) 2012-12-31 2015-08-11 Saint-Gobain Abrasives, Inc. Bonded abrasive article and method of grinding
US9266219B2 (en) 2012-12-31 2016-02-23 Saint-Gobain Abrasives, Inc. Bonded abrasive article and method of grinding
WO2014106156A1 (en) 2012-12-31 2014-07-03 Saint-Gobain Abrasives, Inc. Bonded abrasive article and method of grinding
WO2014165447A1 (en) 2013-03-31 2014-10-09 Saint-Gobain Abrasives, Inc. Bonded abrasive article and method of grinding
KR101353003B1 (ko) * 2013-05-31 2014-01-22 정희경 나사탭 연삭장치
CN103465115A (zh) * 2013-09-05 2013-12-25 浙江省平湖市工具厂 丝锥铲磨机的摆动铜套
JP2015066651A (ja) * 2013-09-30 2015-04-13 日本精工株式会社 ボールねじ用ねじ軸の螺旋溝研削用砥石および螺旋溝形成方法
CN103831487B (zh) * 2014-02-27 2016-04-20 汉江工具有限责任公司 一种拉削丝锥的磨削方法
CN105196117A (zh) * 2015-09-29 2015-12-30 浙江维克机械科技有限公司 全自动数控丝锥螺纹磨床
CN107309713B (zh) * 2017-06-30 2019-03-29 苏州精协机械制造有限公司 一种确定螺纹磨床加工多棱挤压丝锥参数的方法
EP3437799A1 (en) * 2017-08-03 2019-02-06 Danobat S. Coop. Machine tool and method for machining high precision cutting tools
CN110116373A (zh) * 2019-05-21 2019-08-13 浙江维克机械科技有限公司 一种万能数控螺纹磨床
CN110625465A (zh) * 2019-09-06 2019-12-31 洪凡省 一种节气门轴的曲线倒角设备
CN111889825B (zh) * 2020-07-08 2021-08-06 江西联益光学有限公司 一种滑块入子的加工方法

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US1874626A (en) * 1930-06-28 1932-08-30 Joseph R Richer Hob grinding machine
US1933872A (en) * 1931-07-09 1933-11-07 Illinois Tool Works Hob grinder
US2479281A (en) * 1946-01-17 1949-08-16 Lion Mfg Corp Grinding machine
US2585986A (en) * 1948-12-27 1952-02-19 Rudolf W Andreasson Apparatus for relieving the teeth of circular cutting elements
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DE1274011B (de) * 1961-04-28 1968-07-25 Herbert Lindner Ges Mit Beschr Vorrichtung zum Hinterschleifen
DE1502475B1 (de) * 1963-05-14 1970-06-25 Lindner Gmbh Herbert Verfahren zum Hinterschleifen der Schneidzaehne im kegeligen Teil von Gewindebohrern
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Also Published As

Publication number Publication date
US20090104854A1 (en) 2009-04-23
JP5237834B2 (ja) 2013-07-17
CN101500748A (zh) 2009-08-05
US8419504B2 (en) 2013-04-16
DE102006009986B4 (de) 2010-04-01
DE102006009986A1 (de) 2007-09-13
CN101500748B (zh) 2011-07-13
WO2007101593A1 (de) 2007-09-13
RU2397059C2 (ru) 2010-08-20
RU2008139285A (ru) 2010-04-10
JP2009528177A (ja) 2009-08-06
DE502007003728D1 (de) 2010-06-24
EP1991392A1 (de) 2008-11-19

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