EP0896861A2 - Kombiniertes Trenn- und Schleifwerkzeug - Google Patents

Kombiniertes Trenn- und Schleifwerkzeug Download PDF

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Publication number
EP0896861A2
EP0896861A2 EP98660074A EP98660074A EP0896861A2 EP 0896861 A2 EP0896861 A2 EP 0896861A2 EP 98660074 A EP98660074 A EP 98660074A EP 98660074 A EP98660074 A EP 98660074A EP 0896861 A2 EP0896861 A2 EP 0896861A2
Authority
EP
European Patent Office
Prior art keywords
grinding
spindle
arrangement
nut
spindle nut
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.)
Withdrawn
Application number
EP98660074A
Other languages
English (en)
French (fr)
Other versions
EP0896861A3 (de
Inventor
Erkki Tanttu
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.)
T mi Vaunutuote Tanttu
Original Assignee
T mi Vaunutuote Tanttu
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 T mi Vaunutuote Tanttu filed Critical T mi Vaunutuote Tanttu
Publication of EP0896861A2 publication Critical patent/EP0896861A2/de
Publication of EP0896861A3 publication Critical patent/EP0896861A3/de
Withdrawn legal-status Critical Current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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • 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
    • B24D5/12—Cut-off wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/18—Wheels of special form

Definitions

  • the invention relates to an arrangement in connection with a tool, to be used for instance in an angle grinder, the arrangement comprising a spindle rotated by a drive unit, a standard wheel being connected to the spindle by means of a spindle nut.
  • An object of the present invention is to provide a novel arrangement for an angle grinder to allow one and the same machine to be used for both cutting a pipe and for grinding the flash.
  • the arrangement of the invention is characterized in that on the outer periphery of a spindle nut is formed a grinding surface, which allows it to be used for grinding flash that builds up for instance when pipes are cut.
  • the angle grinder spindle is provided with a separate grinding member, which has a diameter substantially smaller than the diameter of the standard grinding wheel, a grinding surface being formed on the outer periphery of the grinding member.
  • the grinding member is a separate grinding wheel substantially smaller that the standard grinding wheel and it is arranged between the standard grinding wheel and the spindle nut.
  • an essential idea of a second embodiment of the invention is that a grinding surface is formed on the outer periphery of the spindle nut, either by knurling the outer periphery or by forming there abrasive teeth in another way, or the spindle nut comprises a metallic nut portion which has a ring-shaped grinding portion around it, the grinding portion being made of a grinding stone of a type known per se.
  • an essential idea of a third embodiment is that the spindle nut comprises a grinding pin which has a nut portion and a grinding portion on an extension part of the nut portion.
  • An advantage of the invention is that now plumbing can be performed by using a single grinding device, i.e. an angle grinder provided with an arrangement of the invention.
  • an angle grinder is provided with a cutting wheel and an arrangement of the invention
  • the cutting wheel can be used for cutting the pipes and, immediately thereafter, the flash can be conveniently ground off at the same time by means of a grinding member, both from the outer and inner surfaces of a pipe. This saves time and the work progresses well, because frustrating changing of machines and searching is avoided.
  • the arrangement can also be used for removing protective grease from the inner surface of a pipe.
  • An arrangement of the invention also allows the angle grinder to be better utilized.
  • the arrangement of the invention is inexpensive, which makes it available also to non-professional users. The arrangement does not in any way cause difficulties in the normal use of the machine.
  • the arrangement can naturally be arranged to an angle grinder together with a grinding wheel or any other wheel.
  • Figure 1 is a schematic side view, partly in section, showing an arrangement of the invention arranged to an angle grinder.
  • the arrangement comprises a standard wheel 1, which is arranged against collars of the spindle 2, and an auxiliary wheel 3 substantially smaller than the standard wheel 1, the auxiliary wheel 3 being arranged against the standard wheel 1.
  • the two wheels 1 and 3 are attached by means of a spindle nut 4 in such a way that they rotate with the spindle 2.
  • the auxiliary spindle 3 can be made for instance of an ordinary grinding stone used in wheel manufacturing, or a corresponding material can be used.
  • FIG. 2 is a schematic view of another application of the invention; here the spindle nut 4 forms the grinding member, therefore no separate auxiliary wheel 3 is needed.
  • a grinding surface for instance by knurling or cogging, or in another previously known manner not described in any detail here.
  • the material of this kind of a spindle nut could be for instance a suitable tool-making steel, which lasts fairly long in the application concerned. Because the spindle nut 4 has a right-hand thread exactly corresponding to a spindle nut thread of an ordinary angle grinder, grinding performed on its outer periphery 5 continuously tightens the nut, which ensures its safety.
  • the spindle nut 4 also comprises fully normal means for tightening the nut.
  • FIG 3 is a schematic view of a third application, in which the grinding member is formed by the spindle nut 4, the inner portion of which is a nut portion 6 made of metal, a grinding portion 7 being formed on the outer periphery of the spindle nut.
  • the grinding portion 7 and the nut portion 6 are attached together so as to form an entity.
  • the grinding portion 7 can be manufactured for instance of a grinding stone material suitable for this purpose.
  • FIG 4 shows yet another application of the invention, the application comprising a grinding pin 8 arranged to the spindle, the grinding pin acting at the same time as a spindle nut.
  • the grinding pin 8 comprises a nut portion 6, which allows it to be screwed to the spindle 2, and a grinding portion 7 formed on an extension of the nut portion 6.
  • the diameter of the grinding portion 7 is usually smaller than the diameter of the nut portion 6, which allows the grinding pin 8 to be used for machining smaller pipes, too. Naturally the diameter of the grinding portion 7 can also be greater than the nut portion 6.
  • the grinding portion 7 can be used for grinding in the axial direction of the spindle 2.
  • the grinding pin is preferably conical, because then the grinding pin can be partly pushed into the pipe, in the axial direction of the pipe.
  • Figure 5 shows a protective washer 9 relating to the solution of the invention, the washer being meant to prevent undesired wear of the standard wheel 1 in the direction of the axis of the spindle 2.
  • the protective washer 9 can be for instance a metal disc having in the center a hole of the size of the spindle 2, the hole allowing the disc to be arranged between the standard wheel 1 and the grinding member.
  • the drawing and the related description are only meant to illustrate the inventive idea.
  • the details of the invention may vary within the scope of the claims.
  • the use of an application of the invention is therefore not restricted only to angle grinders, but it can also be applied equally well for instance to drilling machines and milling machines, and to different grinding machines.
  • the application of the invention can also be successfully applied to the straightening of pipe ends.
  • the standard wheel is then pressed, in the direction of the spindle, against the pipe end, which produces a straight and an even pipe end, after which the arrangement of the invention is used for removing the flash that builds up.
  • the arrangement can also be exploited in other operations than plumbing.
  • the arrangement of the invention can be used for instance for making welding bevels on plates by means of a conical grinding member.
  • a cup wheel can also be arranged between the standard wheel and the spindle nut.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP98660074A 1997-08-11 1998-08-06 Kombiniertes Trenn- und Schleifwerkzeug Withdrawn EP0896861A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI973293 1997-08-11
FI973293A FI973293A (fi) 1997-08-11 1997-08-11 Sovitelma ty¦kalussa

Publications (2)

Publication Number Publication Date
EP0896861A2 true EP0896861A2 (de) 1999-02-17
EP0896861A3 EP0896861A3 (de) 2000-11-15

Family

ID=8549334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98660074A Withdrawn EP0896861A3 (de) 1997-08-11 1998-08-06 Kombiniertes Trenn- und Schleifwerkzeug

Country Status (2)

Country Link
EP (1) EP0896861A3 (de)
FI (1) FI973293A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102029565A (zh) * 2009-10-05 2011-04-27 杨泰和 内转式马达直接驱动的手持转角砂轮机
KR101389947B1 (ko) * 2012-04-03 2014-04-30 고철환 절단면 연마휠이 형성된 파이프 절단기

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1883392A (en) * 1931-04-15 1932-10-18 Moll Edwin Power driven mechanic's hand tool
EP0412439A2 (de) * 1989-08-11 1991-02-13 O'Reilly, Gerard Schleifmaschine und hiermit verwendete Distanzstücke
US5468176A (en) * 1992-11-02 1995-11-21 Hilti Aktiengesellschaft Disk-shaped tool bit for an angle grinder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1883392A (en) * 1931-04-15 1932-10-18 Moll Edwin Power driven mechanic's hand tool
EP0412439A2 (de) * 1989-08-11 1991-02-13 O'Reilly, Gerard Schleifmaschine und hiermit verwendete Distanzstücke
US5468176A (en) * 1992-11-02 1995-11-21 Hilti Aktiengesellschaft Disk-shaped tool bit for an angle grinder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102029565A (zh) * 2009-10-05 2011-04-27 杨泰和 内转式马达直接驱动的手持转角砂轮机
CN102029565B (zh) * 2009-10-05 2014-11-12 杨泰和 内转式马达直接驱动的手持转角砂轮机
KR101389947B1 (ko) * 2012-04-03 2014-04-30 고철환 절단면 연마휠이 형성된 파이프 절단기

Also Published As

Publication number Publication date
FI973293A0 (fi) 1997-08-11
EP0896861A3 (de) 2000-11-15
FI973293A (fi) 1999-02-12

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