EP0274497B1 - Verfahren und vorrichtung zum auf mass schleifen von formteilrohlingen - Google Patents

Verfahren und vorrichtung zum auf mass schleifen von formteilrohlingen Download PDF

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Publication number
EP0274497B1
EP0274497B1 EP87904379A EP87904379A EP0274497B1 EP 0274497 B1 EP0274497 B1 EP 0274497B1 EP 87904379 A EP87904379 A EP 87904379A EP 87904379 A EP87904379 A EP 87904379A EP 0274497 B1 EP0274497 B1 EP 0274497B1
Authority
EP
European Patent Office
Prior art keywords
tip
grinding
blank
ground
moulding blank
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.)
Expired - Lifetime
Application number
EP87904379A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0274497A1 (de
Inventor
Werner WÄLTI
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.)
Tschudin Werkzeugmaschinenfabrik
Original Assignee
Tschudin Werkzeugmaschinenfabrik
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Filing date
Publication date
Application filed by Tschudin Werkzeugmaschinenfabrik filed Critical Tschudin Werkzeugmaschinenfabrik
Priority to AT87904379T priority Critical patent/ATE62168T1/de
Publication of EP0274497A1 publication Critical patent/EP0274497A1/de
Application granted granted Critical
Publication of EP0274497B1 publication Critical patent/EP0274497B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/01—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor for combined grinding of surfaces of revolution and of adjacent plane surfaces on work
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/065—Steady rests

Definitions

  • the present invention relates to a device according to the preamble of claim 1, by means of which pre-ground molded blanks can be ground to size.
  • This grinding of the pre-ground molded parts to size if only one end of the molded part has to be ground to size and a high degree of dimensional accuracy, in particular the cylindricity or taper of another area of the molded part is required, must be grinding between tips, which can be done in two or more successive grinding operations with intermediate reclamping of the molded parts on the grinding machine.
  • the present invention is based on the object of proposing a device by means of which the disadvantages of conventional pre-ground molded blanks can be overcome and cost-effective, high-precision, axially symmetrical profiled molded parts can be ground to size in a single grinding process between tips, even if an end region of the molded blanks must also be sanded.
  • this object is achieved by a device according to claim 1.
  • this representative molded part chosen for the illustration of the present invention is an extraordinarily demanding part, which is extremely difficult to produce in the conventional methods and with the conventional means, and its series production by means of the conventional method of decolletizing and gradual grinding of the different diameters and angles is very expensive.
  • this sophisticated part is very well suited to demonstrate the advantages and possibilities of the present invention compared to the conventional manufacturing processes for such parts.
  • a nozzle needle blank starts out by means of a Vietnamese ground operation an unhardened steel rod is unscrewed, whereupon this blank is hardened and pre-ground as part of a centerless grinding process before the guide diameter 3 and then the seat angle 11 and then the clearance angle 12 of the tip 10 are ground in individual grinding operations with different clamping of the molding blank 18.
  • a grinding process as described hereinafter with reference to FIG. 2, can advantageously be used instead of the decolletizing and centerless grinding.
  • a rod 13 of round material advantageously unhardened or hardened steel
  • the first collet 14 opposite a second collet 16 is arranged on the same axis B in a synchronous tool headstock 17 into which the rod 13, respectively.
  • a pre-machined molding blank 18 still connected to the rod 13 is inserted up to an adjustable and adjustable stop 19.
  • the two tool headstocks are advantageously components of an NC-controlled machine that enables automatic control of all work processes and operations.
  • a profile grinding wheel 20 and a support bezel 21 can also be seen in FIG. 2. It is also noticeable that the axis B is opposite that illustrated by the double arrow C. Feed axis of the profile grinding wheel 20 is not at a right angle, but is inclined to it. An inclination of approx. 10 ° has proven itself and makes it possible to grind the part end 1 'coming perpendicular to the longitudinal axis A of the molded part 1' and the needle lifting support 5 and the release transition 6 in a single grinding operation correctly at right angles to said longitudinal axis A of the molded part.
  • the profile grinding wheel 20 is designed such that it pre-grinds part of a first molded part blank 18 'at the same time and finely grinds at least some or all of the molded part blank 18' in one work step and separates it from the fully pre-machined molded part 18 lying partially in the second collet 16.
  • the support bezel 21 is arranged accordingly.
  • the second collet 16 in the synchronous tool headstock 17 is advantageously opened and retracted in such a way that the molding blank 18 which is partially inserted into it and is now separated from the rod 13 is pushed out of it by means of the stop 19 can be before the rod 13 is pushed so far until the molded part blank 18 'still connected to it in the place of the molded part blank 18 is inserted into the second collet 16 becomes. Then, possibly after a previous removal of the profile grinding wheel 20, again the grinding process described above takes place, in which a part of a new molding blank 18 'is pre-ground and a part or the whole of the molding blank 18' is ground to the point of separation from the rod 13. In this work step it may be appropriate to monitor a critical part diameter during the grinding process by means of a diameter measuring head 22 such that the profile disk feed can be controlled as a function of this part dimension.
  • the molded part blanks 18 produced according to the above grinding operation provided they have been ground out of hardened rods 13, are finished and at least have the dimensional accuracy and surface quality of centerless ground parts. They can therefore be fed directly to grinding to size without further preprocessing.
  • this type of production of the molded part blanks eliminates the need for centerless grinding of the blanks before grinding to size in the device according to the invention according to FIG. 3.
  • FIG. 3 the molded part blank receptacle and a fine grinding profile grinding wheel 29 shows by means of which the molded part blank 18 is finished to produce the finished, highly precise nozzle needle milled with the inner bore of the nozzle needle housing (not shown). Thanks to the method and the device according to the invention, the machining of the nozzle needle can, as mentioned, be carried out in a single clamping of the molding blank 18 between tips. Since this molding blank 18 only at its largest diameter, the guide diameter 3 and the tip 10, respectively.
  • the molding blank 18 is inserted with its rear end, that is to say the pressure pin 1, into a so-called 6 ° driver 24, which is part of a workpiece drive 34 free of lateral force, in such a way that it passes over the between the pressure pin 1 and the clearance 2 of the needle stroke support 5 lying edge is taken when the driver 24 itself is set in rotation.
  • the driver 24 is retractable in the direction of the workpiece headstock 25 in order to insert the molding blank 18 from the side of the workpiece headstock 25 into the centering bezel 23 before the driver 24 is brought into operative connection with the molding blank 18.
  • the centering bezel 23 is essentially a U-shaped support 26 which, like a hollow counter tip, is connected to the tailstock 27 of the advantageously NC-controlled grinding machine and exactly bears in the intermediate tip axis D completely drilled hollow tip 28 through which the molded part blank 18 can pass in such a way that the hollow tip 28 guides and centers it at a point that no longer needs to be ground when the molded part blank 18 is finished and is designed as a steady rest .
  • the steady rest 8 of the groove 7 is received by the hollow tip 28 such that only the guide diameter 3, which, as mentioned above, must be ground in pairs, is effectively ground “between tips”.
  • the needle shaft 4 and the adjoining tip 10 with their cone segments to be finished, the seat angle 11 and the clearance angle 12 protrude in the direction of the tailstock 27 from the hollow tip 28 such that the needle shaft 4 with the adjoining seat angle 11 and clearance angle 12 is free-standing the fine grinding profile grinding wheel 29 projecting into the intermediate bezel 23 can be ground.
  • the intermediate bezel 23 according to the invention makes it possible for a plurality of its cylindrical regions and also one end region to be ground to size in a single clamping of the molding blank 18.
  • the cylindrical region is the guide diameter 3 to be milled, which can be finish-ground either by a fine-grinding profile grinding wheel used specifically for this purpose or by part of a combined fine-grinding profile grinding wheel 29 according to FIG. 3.
  • the end region is the tip 10 of the molding blank 18.
  • the tool headstock is advantageously equipped with a device according to Swiss Pat. No. 623 261 for cylindrical grinding of workpieces.
  • the fine grinding profile grinding wheel 29 can also be adjusted laterally at right angles to its normal feed direction according to double arrow E in accordance with double arrow F such that that part of the fine grinding Profile grinding wheel 29, or possibly a separate grinding wheel, which is used for finish grinding the seat angle 11 and the clearance angle 12 of the tip 10, in addition to the finish grinding of these angles, also ensures the correct length of the nozzle needle.
  • a support bezel can also support the free-standing part of the molded part blank 18 in this grinding process in order to prevent an undesired deformation of this part.
  • two fine grinding wheels are advantageously combined to form a single one, in order to be used as a one-piece fine grinding profile grinding wheel 29.
  • it can also be removed automatically, in such a way that the nozzle needles that have been ground with it have the highest precision and the best surface quality.
  • the fine grinding profile grinding wheel 29 can be provided with two individually used profiles 32 and 33, such that, for example, simultaneously with the final grinding of the guide diameter 3 to be mated by means of the first profile 32 according to Fig. 4, the seat angle 11 is ground and the clearance angle 12 is pre-ground, whereas the clearance angle 12 is finish-ground after the fine-grinding profile grinding wheel 29 has been retracted and moved up again by means of the second profile 33 according to FIG. 5.
  • a molded part that can only be ground to size in a number of workpiece clamps can be ground to size in two work steps with a single workpiece clamping between centers.
  • molded parts other than nozzle needles for injection pumps can also be produced inexpensively on a device according to the invention and with a reduced number of clampings compared to the conventional manufacturing processes. It is sufficient to adapt the profile grinding wheels 20 and 29 as well as the centering bezel 23 which serves to clamp the molding blank 18 to the specific circumstances. Inventive addition is no longer necessary.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP87904379A 1986-07-21 1987-07-17 Verfahren und vorrichtung zum auf mass schleifen von formteilrohlingen Expired - Lifetime EP0274497B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87904379T ATE62168T1 (de) 1986-07-21 1987-07-17 Verfahren und vorrichtung zum auf mass schleifen von formteilrohlingen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2912/86A CH670788A5 (enrdf_load_stackoverflow) 1986-07-21 1986-07-21
CH2912/86 1986-07-21

Publications (2)

Publication Number Publication Date
EP0274497A1 EP0274497A1 (de) 1988-07-20
EP0274497B1 true EP0274497B1 (de) 1991-04-03

Family

ID=4244412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87904379A Expired - Lifetime EP0274497B1 (de) 1986-07-21 1987-07-17 Verfahren und vorrichtung zum auf mass schleifen von formteilrohlingen

Country Status (5)

Country Link
US (1) US4827673A (enrdf_load_stackoverflow)
EP (1) EP0274497B1 (enrdf_load_stackoverflow)
JP (1) JPH01500980A (enrdf_load_stackoverflow)
CH (1) CH670788A5 (enrdf_load_stackoverflow)
WO (1) WO1988000512A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010004341A1 (de) * 2010-01-11 2011-07-21 JÄGER-Engineering GmbH, 78126 Verfahren zur Bearbeitung von Stangen- oder Rohrmaterial oder Einlegeteilen zur Herstellung von rotationssymmetrischen Werkstücken

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3733308A1 (de) * 1987-10-02 1989-04-13 Buderus Kundenguss Schleifkoerper
JPH0890408A (ja) * 1994-09-27 1996-04-09 Toyoda Mach Works Ltd 研削方法
US7008294B2 (en) * 2002-07-17 2006-03-07 Erwin Junker Maschinenfabrik Gmbh Method and device for grinding a rotating roller using an elastic steady-rest support
US7787723B2 (en) * 2002-11-11 2010-08-31 Cube Optics Ag Support element for mounting optical elements and method of producing such a support element
JP6445257B2 (ja) * 2014-06-04 2018-12-26 Ntn株式会社 円筒状ワークの加工方法および加工装置
JP2016101664A (ja) * 2014-11-27 2016-06-02 三星ダイヤモンド工業株式会社 基板加工用ツールの製造方法及び基板加工用ツール

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2617322A (en) * 1947-10-30 1952-11-11 Herman E Malear Turret lathe attachment
DE1284867B (de) * 1965-03-02 1968-12-05 Mso Maschinen U Schleifmittelw Universalschleifmaschine mit Revolverkopf
US3760662A (en) * 1971-08-20 1973-09-25 I Brock Tool holder adaptor
CH622204A5 (enrdf_load_stackoverflow) * 1978-07-06 1981-03-31 Sidco Sa
JPS55101369A (en) * 1979-01-30 1980-08-02 Toyoda Mach Works Ltd Sizing device corrected at measuring position responsive to boring diameter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010004341A1 (de) * 2010-01-11 2011-07-21 JÄGER-Engineering GmbH, 78126 Verfahren zur Bearbeitung von Stangen- oder Rohrmaterial oder Einlegeteilen zur Herstellung von rotationssymmetrischen Werkstücken
DE102010004341B4 (de) * 2010-01-11 2012-03-01 JÄGER-Engineering GmbH Verfahren zur Bearbeitung von Stangen- oder Rohrmaterial oder Einlegeteilen zur Herstellung von rotationssymmetrischen Werkstücken

Also Published As

Publication number Publication date
WO1988000512A1 (en) 1988-01-28
JPH01500980A (ja) 1989-04-06
CH670788A5 (enrdf_load_stackoverflow) 1989-07-14
US4827673A (en) 1989-05-09
EP0274497A1 (de) 1988-07-20

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