EP0347462A1 - Dispositif d'usinage magneto-abrasif de surfaces cylindriques externes de pieces - Google Patents

Dispositif d'usinage magneto-abrasif de surfaces cylindriques externes de pieces Download PDF

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Publication number
EP0347462A1
EP0347462A1 EP88903120A EP88903120A EP0347462A1 EP 0347462 A1 EP0347462 A1 EP 0347462A1 EP 88903120 A EP88903120 A EP 88903120A EP 88903120 A EP88903120 A EP 88903120A EP 0347462 A1 EP0347462 A1 EP 0347462A1
Authority
EP
European Patent Office
Prior art keywords
pair
pole pieces
workpiece
magnetic
axis
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Withdrawn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
EP88903120A
Other languages
German (de)
English (en)
Other versions
EP0347462A4 (en
Inventor
Viktor Nikolaevich Chachin
Nikolai Stepanovich Khomich
Lel Konstantinovich Druzhinin
Igor Alexeevich Shlepov
Rostislav Olegovich Dulgier
Boris Antonovich Steblovsky
Viktor Petrovich Budnik
Nikolai Petrovich Morozov
Vitaly Valentinovich Babuk
Alexandr Petrovich Tarun
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.)
Belarusian National Technical University BNTU
Fiziko Tekhnichesky Institut Akademii Nauk Belorusskoi SSR
Original Assignee
Belarusian National Technical University BNTU
Fiziko Tekhnichesky Institut Akademii Nauk Belorusskoi SSR
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 Belarusian National Technical University BNTU, Fiziko Tekhnichesky Institut Akademii Nauk Belorusskoi SSR filed Critical Belarusian National Technical University BNTU
Publication of EP0347462A1 publication Critical patent/EP0347462A1/fr
Publication of EP0347462A4 publication Critical patent/EP0347462A4/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Withdrawn legal-status Critical Current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
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing

Definitions

  • the present invention relates to the field of grinding workpieces, in particular to a device for magnetic grinding of cylindrical outer surfaces of workpieces.
  • a device for descaling wire by drawing it through ferromagnetic powder that is compressed between two disks (SU, A, 787 131).
  • One of the disks is designed to be rotatable and provided with beads for holding the powder.
  • the second disc is cushioned and is used for mechanical compression of the powder in the processing area.
  • the known device does not guarantee high quality in the treatment of the wire, especially if it is made of soft and tough alloys, because mechanical clamping of the grinding powder in the work area leads to embedding of the abrasive in the machined surface. This phenomenon can be avoided by reducing the pressure of the pressure disc on the powder, but the performance of the process drops dramatically.
  • the device according to the invention comes closest to a device for the magnetic grinding of cylindrical outer surfaces of workpieces, namely for descaling or derusting wires or heavy rolled products (SU, A, 975 134).
  • the known device for magnetic grinding processing includes: an electromagnetic system with a pair of pole pieces, which are arranged opposite one another and form an annular working area, and a device for longitudinally feeding the wire or the heavy rolled product into the working area.
  • the pole shoes are designed as disks, which are arranged opposite one another in the end faces of an electromagnetic coil and have a center bore for the through run of the wire or the heavy rolled goods.
  • the inner cavity of the coil between the pole pieces is filled with ferromagnetic grinding powder, while the actual pole pieces are covered on the outside with non-magnetic covers.
  • the abrasive particles scratch the surface to be machined and remove the surface layer from the workpiece.
  • the surface is only processed with the particles from the chains that are closest to the lines of force.
  • the blunting of the cutting edges of the particles affects the machining conditions. Since the cutting ability of the particles is not restored in the known device, the dulling of the latter results in an abrupt reduction in the machining performance and goodness.
  • the fine chips that occur on the surface to be machined when the abrasive particles are scratched are not removed from the working area, but are mixed with the abrasive powder, which also deteriorates the cutting properties of the latter.
  • a small amount of the grinding particles involved in the processing, the contamination of the powder with processing waste, the low pressure of the grinding particles on the surface to be processed as a result of the arrangement of the magnetic lines of force parallel to the feed direction of the Workpiece thus result in a rapid loss of the cutting properties of the ferromagnetic grinding powder and an uneven processing according to the length of the cylindrical surfaces of the workpieces, in particular a wire or rod.
  • the invention has for its object to provide a device for magnetic grinding of cylindrical outer surfaces of workpieces, in which the structural design of the electromagnetic system and the arrangement of the pole shoes would allow scale and oxide films to be removed completely and uniformly over the entire surface of the workpiece , which could significantly increase the performance and quality of magnetic grinding.
  • the object is achieved in that device for magnetic grinding machining cylindrical outer surfaces of workpieces, which contains an electromagnetic system with a pair of pole pieces, which are arranged opposite one another and form an annular working area, and a device for longitudinal feed of the workpiece into the working area ,
  • the diameter of the pole shoes is, the pole shoes in each pair being kinematically connected to one another, having a common axis of rotation and being mounted with an eccentricity of opposite sign to this axis.
  • the pole shoes are arranged so that the magnetic lines of force penetrate the annular working area in a direction perpendicular to the feed direction of the workpiece to be machined.
  • the abrasive powder particles align themselves in chains along the magnetic lines of force and exert the maximum force on the surface to be machined. Effect out.
  • the abrasive powder particles form an annular "cutting brush", run onto the surface of the workpiece to be machined, exert pressure on it, have a grinding effect and push the workpiece away into the cavity between the pole pieces.
  • the powder particles come into contact with the surface of the workpiece to be machined, return to the original position and form the initial cutting contour from the quantity of particles in the form of the ring-shaped "cutting brush".
  • the return of the particles to the starting position is promoted by the shell shape of the pole shoes arranged in pairs, which ensures the greatest value of the mangetic induction in the space between the outer pole edges.
  • the workpiece to be machined (wire or rod) continues to move without rotation, only one half of its surface is machined with one pair of pole pieces.
  • the second pair of pole shoes is provided, which is offset by a distance L from the first along the axis of the workpiece with respect to the first pair.
  • the characteristic values of the descaling process are significantly influenced by the size L.
  • the inventive device for magnetic grinding of cylindrical outer surfaces of workpieces, for. B. of wire (as shown in Fig. 1) contains an electromagnetic system that a z. B. on a (not shown in Fig.) Machine bed mounted magnetic conductor 1 and two pairs 2 and 3 vnn pole pieces 4 (Fig. 2) and 5 (Fig. 3).
  • Electromagnetic coils 6 (FIG. 2) are attached to the magnetic conductor 1 and are connected to a direct current source.
  • bearings 7 are attached, on which shafts 3 are supported.
  • the pole pieces 4 and 5 are attached to each other on the shafts 8 and form an annular working area 9.
  • the pole pieces 4 and 5 are kinematically connected to one another via joints 10, which as Screws are formed with which the pole pieces 4 and 5 are fastened to the shafts 8.
  • One (not shown in FIG te) device for the rotary drive of the pole shoes 4 and 5 is present, which are driven in rotation by means of a belt drive 11 via a drive pulley 12 mounted on the shaft 8 (in the direction indicated by arrow A in FIG. 2).
  • the pole shoes 4 and 5 are supported with a gap h, have a common axis of rotation 0-0 and are offset from their axis of rotation 0-0 by the size of the eccentricity e with opposite signs.
  • the space between the end faces 13 of the pole shoes 4 and 5 is filled with a ferromagnetic grinding powder 14.
  • a device for longitudinal feed which includes rollers 16, is provided in the device for loading the workpiece 15.
  • the device for rotating the rollers 16 is not shown.
  • the pair 2 of the pole shoes 4 is along the axis 0 1 - 0 1 of the workpiece 15 with respect to the pair 2 of the shoes 5 by the distance L offset.
  • the distance L is set within the limits of (0.2 to 1.0) D, where D is the diameter of the pole pieces 4 and 5.
  • the device according to the invention functions as follows.
  • the electromagnetic coils 6 are supplied with electric current, an electromagnetic field is created around the coils 6 and the pole pieces 4 and 5 are magnetized. Under the action of the magnetic field, the powder 14 is compressed in the gaps h between the pole pieces 4 and 5 and forms two ring-shaped work areas 9.
  • the shaft pieces 4 and 5 are set in rotation by means of shafts 8, traction sheaves 12 and belt drives 11
  • Arrows B and B 1 rotating rollers 16 is to be processed 15 rotates along the axis 0 1 - progressively moves 0 1 according to the arrow S and between the pairs 2 and 3 of the P o l mort 4 and 5 advanced so that its axis 0 1 - 0 1 represents a tangent to the outer surfaces of the annular regions 9 filled with the powder 14.
  • each pair 2 and 3 processes its surface half of the workpiece 15. At the boundaries of these machined halves, the metal decrease is less than in the other surface areas.
  • the pole shoes 4 and 5 in each pair 2 and 3 are offset in opposite directions with respect to the axis of rotation 0-0. H. with the eccentricity e of opposite sign.
  • the pair 2 and 3 of the pole shoes 4 and 5 revolve with an “opposite-phase radial stroke”, the powder particles 14 in this case, as it were, oscillate along the circumference of the surface to be machined.
  • each pair 2 and 3 of the shoes 4 and 5 does not process half, but rather the largest surface part of the workpiece 15; the surface sections machined with each pair 2 and 3 are partially covered from one another, the uniformity of the descaling increases.
  • Technological conditions of descaling linear rotation speed of the pole shoes 4 m / s; Feed speed 0.05 m / s; Working gap size 1.5 mm; magnetic field strength in the coils 120 A / m.
  • Pole shoes with a diameter of 146, 90 and 122 mm were used, which were set at different distances L and with different eccentricity e were.
  • Ferromagnetic abrasive powder Pe-TiC (40%) with a grain size of 315/100 ⁇ m and coolant was used. The descaling results are summarized in a table.
  • the metal mass g which is removed from a unit area of the machined surface, serves as the characteristic value of the machining performance.
  • the quality of the descaling was assessed according to the parameter R a of the machined surface.
  • the device according to the invention for magnetic grinding of cylindrical outer surfaces of workpieces enables high machining quality by producing an elastic contact between the machining tool (ring brush made of powder) and the workpiece to be machined and the workpiece are avoided, thereby preventing possible penetration of the powder particles into the body of the workpiece and abrasive embedding in the surface to be produced.
  • the high performance during operation of the device is due to the continuous reorientation of the powder particles in the ring-shaped working area and the fact that practically the entire powder mass is involved in the work.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Abstract

Le dispositif comprend un système électro-magnétique doté d'une paire supplémentaire (3) de cornes polaires (5), montée à l'opposé de la première paire (2) et décalée par rapport à cette dernière le long de l'axe longitudinal (01-01) de la pièce (15), usinée à une distance L = (0,2-1,0)D, D représentant le diamètre des cornes polaires. Les cornes polaires (4 et 5) se trouvant dans chaque paire (2 et 3) sont cinématiquement interconnectées, ont un axe de rotation commun (0-0) et sont montées avec une excentricité (e) de signe opposé par rapport audit axe.
EP19880903120 1987-11-18 1987-11-18 Device for magneto-abrasive machining of external cylindrical surfaces of parts Withdrawn EP0347462A4 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SU1987/000131 WO1989004731A1 (fr) 1987-11-18 1987-11-18 Dispositif d'usinage magneto-abrasif de surfaces cylindriques externes de pieces

Publications (2)

Publication Number Publication Date
EP0347462A1 true EP0347462A1 (fr) 1989-12-27
EP0347462A4 EP0347462A4 (en) 1990-10-10

Family

ID=21617150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880903120 Withdrawn EP0347462A4 (en) 1987-11-18 1987-11-18 Device for magneto-abrasive machining of external cylindrical surfaces of parts

Country Status (4)

Country Link
US (1) US4977707A (fr)
EP (1) EP0347462A4 (fr)
JP (1) JPH02502172A (fr)
WO (1) WO1989004731A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103769973A (zh) * 2013-12-31 2014-05-07 重庆凌达磁材科技有限公司 瓦型磁体磨削装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1229418B (it) * 1989-06-02 1991-08-08 Giuseppe Vassena Apparecchiature per la levigazione e la lucidatura di fili o profilati metallici in linea ad operazioni di trafilatura e laminazione a freddo.
JPH0777704B2 (ja) * 1989-12-04 1995-08-23 松下電器産業株式会社 微小研磨方法
JP2682260B2 (ja) * 1991-05-09 1997-11-26 松下電器産業株式会社 微小研磨方法及び微小研磨工具
US5569061A (en) * 1995-04-12 1996-10-29 Kremen; Genady Method and device for magneto-abrasive machining of parts
US5775976A (en) * 1997-03-27 1998-07-07 Scientific Manufacturing Technologies, Inc. Method and device for magnetic-abrasive machining of parts
US5813901A (en) * 1997-03-27 1998-09-29 Scientific Manufacturing Technologies Inc Method and device for magnetic-abrasive machining of parts
DE102005010286A1 (de) * 2005-03-01 2006-09-07 Thiel, Wolfgang, Dr. Bearbeitungsvorrichtung und -verfahren zum Bearbeiten von Oberflächen in Vertiefungen von Werkstücken

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005550A (en) * 1972-02-28 1977-02-01 Znitmash Of Chaussee Za Gara Izkar Machine for magnetically polish-grinding work pieces having large dimensions
JPS61103772A (ja) * 1984-10-24 1986-05-22 Shinko Sangyo Setsubi Kk 強磁性研摩砕粒利用の研摩方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU787131A1 (ru) * 1979-02-12 1980-12-15 Всесоюзный Проектно-Конструкторский Институт Сварочного Производства Устройство дл очистки проволоки
SU973208A1 (ru) * 1981-05-18 1982-11-15 Казахский политехнический институт им.В.И.Ленина Устройство дл очистки катанки от окалины
SU975134A1 (ru) * 1981-07-01 1982-11-23 Магнитогорский горно-металлургический институт им.Г.И.Носова Устройство дл очистки проволоки или круглого проката

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005550A (en) * 1972-02-28 1977-02-01 Znitmash Of Chaussee Za Gara Izkar Machine for magnetically polish-grinding work pieces having large dimensions
JPS61103772A (ja) * 1984-10-24 1986-05-22 Shinko Sangyo Setsubi Kk 強磁性研摩砕粒利用の研摩方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 10, no. 286 (M-521)[2342], 27th September 1986; & JP-A-61 103 772 (SHINKO SANGYO SETSUBI K.K.) 22-05-1986 *
See also references of WO8904731A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103769973A (zh) * 2013-12-31 2014-05-07 重庆凌达磁材科技有限公司 瓦型磁体磨削装置

Also Published As

Publication number Publication date
EP0347462A4 (en) 1990-10-10
JPH02502172A (ja) 1990-07-19
WO1989004731A1 (fr) 1989-06-01
US4977707A (en) 1990-12-18

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