EP1727648B1 - Dispositif et procede d'ebavurage et de brunissage de pieces mecaniques - Google Patents

Dispositif et procede d'ebavurage et de brunissage de pieces mecaniques Download PDF

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Publication number
EP1727648B1
EP1727648B1 EP05718152A EP05718152A EP1727648B1 EP 1727648 B1 EP1727648 B1 EP 1727648B1 EP 05718152 A EP05718152 A EP 05718152A EP 05718152 A EP05718152 A EP 05718152A EP 1727648 B1 EP1727648 B1 EP 1727648B1
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EP
European Patent Office
Prior art keywords
roller
magnetic
arbour
workpiece
burnishing
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Active
Application number
EP05718152A
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German (de)
English (en)
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EP1727648A1 (fr
Inventor
János KODACSY
József DANYI
György ZIAJA
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.)
Kecskemeti Foiskola Gamf Kar
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Kecskemeti Foiskola Gamf Kar
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Priority claimed from HU0400484A external-priority patent/HU0400484D0/hu
Priority claimed from HU0500231A external-priority patent/HU227622B1/hu
Application filed by Kecskemeti Foiskola Gamf Kar filed Critical Kecskemeti Foiskola Gamf Kar
Publication of EP1727648A1 publication Critical patent/EP1727648A1/fr
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Publication of EP1727648B1 publication Critical patent/EP1727648B1/fr
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    • 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
    • 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
    • B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
    • B24B39/003—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor the working tool being composed of a plurality of working rolls or balls

Definitions

  • the object of the invention is an apparatus and method for deburring and roller-burnishing machine parts.
  • Deburring methods can be known from Deburring and Edge Finishing Handbook by La Raux K. Gillespie (ASME Press, New York, 1989 ) and from Handbuch Entgrattechnik by Hans-Michael Beier (Carl Hauser Verlag, Ober-Wien, 1999 ) which describe more than a hundred different manual and machine methods for deburring.
  • the most widely known methods include mechanical machining technologies such as lathing, boring, grinding, abrasive grinding, sandblasting, thermal machining (laser, electron beam, gas jet), chemical and electrochemical technologies.
  • Sources that present burnishing and roller-burnishing technologies include both methods in the group of mechanical finishing technologies, their aim being changing the surface quality, roughness, hardness, or residual stress condition by local (surface) mechanical working, without removing any material.
  • Known methods apply special devices having shaping bodies of spherical shape (rollers, balls) that are sufficiently harder than the material of the workpiece. These bodies are mechanically pressed against the surface of the workpiece, with the tool being moved about the surface of the work while either the tool or the workpiece itself is rotated. These movements result In that the shaping bodies are rolled or, in case of (non-roller) burnishing, slid along the surface.
  • patent description HU 267 962 discloses a tool for smoothing the surface of a workpiece by rotter-burnishing comprising a support element having conical surface to provide compression force for roller-burnishing.
  • Patent description HU 267 475 describes a roller-burnishing apparatus comprising hydraulic actuator devices.
  • the force needed for surface smoothing is provided using hydraulic means in patent application EP 146 9972
  • patent description EP 145 2272 discloses a process of roller burnishing crankshaft surfaces.
  • the inventive apparatus should be mountable on conventional and CNC-machine tools.
  • the invention is based on the recognition that with suitably configured means it is possible to produce magnetic fields for pressing the magnetisable roller balls against the surface of the workpiece with the desired force, and so mechanical tool tensioning is not needed.
  • the balls are flexibly pressed against the surface so that they can follow minor surface irregularities and edge cracks. Compression force can be adjusted during the process if desired.
  • the aim of the invention can also be realised by utilising a powerful permanent magnet that is preferably placed over the work to be machined such that the roller balls remain pressed against the surface of the workpiece, and follow it.
  • a further aim of the invention is to provide a method that has the steps of pressing the magnetisable roller balls against the surface of the workpiece by means of magnetic field and performing the desired surface smoothing operation by moving the balls along the surface in a way determined by the possibilities of the given machine tool.
  • the apparatus according to the invention is disclosed in claim 1 or 3.
  • the apparatus of Fig. 1 can be utilised for machining a workpiece 2 having plane or general spatial surface, with the workpiece 2 being held on a table of a milling machine and moved in a transverse direction while it is being machined.
  • the inventive apparatus essentially consists of a rotatable magnetic arbour 4 surrounded by a magnetic coil 3 and an adjustable-current DC power supply 5 that is connected to the magnetic coil 3.
  • the apparatus further comprises roller balls 1 "sticking" to the magnetic arbour 4 and performing the machining action, and an oil feed nozzle 6.
  • roller balls 1 are pressed against the outer surface of the workpiece 2 by the collective action of the tapered-end magnetic arbour 4 and the magnetic coil 3, and rotate with the same rpm n as the magnetic arbour 4 along the surface of the workpiece 2, providing rolling action.
  • the roller balls 1 are disposed in seats formed in the conically shaped (tapering) surface of the magnetic arbour 4.
  • the number and size of the roller balls 1 depend on the size and degree of complexity of the surface to be machined. For extended surfaces it is recommended to use a greater number of bigger-sized balls, whereas for complex surfaces fewer and smaller-diameter roller balls 1 may be applied.
  • the magnetic arbour 4 being held in the main spindle of a CNC-machine tool, can track the surface (in a manner similar to the cutter of a milling machine), with the distance between the end of the magnetic arbour 4 and the surface of the workpiece 2 being kept at a minimum in order to minimize magnetic resistance.
  • oil is fed from a nozzle 6 to the working zone in a minimal quantity by means of high-pressurized air, reducing friction and with the oil spray removing material that may have chipped off the surface.
  • the roller balls 1 are preferably hard, magnetisable, polished-surface bearing balls that are coated with TiC-TiN coating to increase abrasion resistance.
  • the non-magnetisable micrometer-thick coating also reduces the adhesivity of magnetisable contaminants, making more effective the operation of the nozzle 6.
  • Fig. 2 shows the sectional view of another embodiment of the inventive apparatus. This embodiment contains a permanent magnet 12.
  • the permanent magnet 12 is disposed inside a tubular extension piece 11 made of non-magnetisable material, together with a connecting piece 9 that is connected to a rotating arbour 8 located above the permanent magnet 12. Bores are disposed in the skirt surface of the tubular extension piece 11 near the end thereof that is proximate to the connecting piece 9, with fastening screws 10 being disposed in the bores securing the tubular extension piece 11 to the connecting piece 9.
  • the connecting piece 9 and the arbour 8 are connected with detachable or undetachable connection.
  • Fig. 2 shows an embodiment with detachable connection.
  • the roller balls 1 "stick" to the permanent magnet 12 and to the tubular extension piece 11 by virtue of the magnetic force exerted by the permanent magnet 12.
  • the apparatus illustrated in Fig. 2 is placed during the machining operation above the workpiece 2 movably attached to the table of a milling machine (not shown in the drawing) in such a way that the roller balls 1 touch the surface of the workpiece 2.
  • the arbour 8, chucked on a driving apparatus not shown here, is rotated with an rpm n, while the workpiece 2 is moved about the table of the mill in a transverse direction.
  • the machining process of the workpiece 2 is essentially the same as has been described above referring to Fig. 1 .
  • the rotation of the arbour 8 and the movement of the table of the milling machine are stopped, and the arbour 8 is withdrawn by lifting it in a direction perpendicular to the plane of the table.
  • the magnetic force exerted on roller balls 1 remains there after the machine has been stopped, and thus the roller balls 1 remain "stuck" to the tubular extension piece 11 and to the permanent magnet 12 and so they can be removed from the workpiece 2 together with the arbour 8.
  • roller ball 1 effectively rolls back edge burrs that are about to come off the top surface of the workpiece 2.
  • Fig. 3 is a magnified view of a portion of Fig. 1 , showing unfinished (freshly milled), rolled-burnished and deburred surfaces. It can be easily seen that, due to the roller-burnishing action burrs either get torn off or are transferred to adjacent surface parts that are less important for the future operation of the machined piece, with the relatively rough surface produced by the tearing off of burr pieces by the first ball being roller-burnished by the next roller ball and the torn-off burr piece being removed by the high-pressure spray coming from nozzle 6.
  • Fig. 4 shows elements of an apparatus that is applied for roller-burnishing a cylindrical surface, at the stage when the roller balls 1, pressed against the surface by magnetic jaws 7 that are moving in a direction parallel with the axis of the workpiece 2, are rolling edge burrs produced at the edge located at the connection of the flat end surface and the cylindrical surface of the workpiece 2.
  • the apparatus can be mounted on a turning machine, the magnetic jaws 7 placed on the saddle can be magnetised by a uniform magnetic field, and the workpiece 2 can be placed in a chuck and rotated with the desired speed, while contaminations that might be produced during roller-burnishing are removed by the high-pressure spray flowing from nozzle 6 that contains a small quantity of oil conforming to the method of minimal-quantity lubrication.
  • roller-burnishing, deburring apparatuses can be produced simply, can be adapted to be mounted on conventional machine tools, and can be easily operated.
  • the surfaces and burred edges of machine parts can undergo a single-stage roller-burnishing operation, which increases productivity and reduces per unit costs, while also reducing the environmental load of the operation due to minimal-quantity lubrication used in the inventive method.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (10)

  1. Appareil pour le façonnage de surfaces planes et de formes variées par une action d'ébavurage et de brunissage au rouleau, comprenant une source de courant continu (DC) (5) et une bobine magnétique (3), caractérisé par la présence d'un arbre rotatif (4) placé à l'intérieur de la bobine magnétique (3), l'arbre magnétique (4) étant adapté à être installé sur une fraiseuse, et comportant également des billes de roulement (1) pressées contre la surface de la pièce (2) par l'action collective de l'arbre magnétique à extrémité effilée et de la bobine magnétique, la pièce étant usinée par le champ magnétique uniforme engendré par la bobine magnétique (3) et l'arbre magnétique (4), et comportant un système de lubrification par quantité minimale d'huile comprenant une buse de pulvérisation pneumatique (6), adaptée à diminuer le frottement et à éliminer les contaminants.
  2. Appareil suivant la revendication 1, caractérisé par la présence d'un arbre magnétique effilé (4) comportant au moins une rainure.
  3. Appareil pour l'ébavurage et le brunissage au rouleau de surfaces planes et de formes variées, caractérisé en ce qu'il peut être installé sur un tour et qu'il comprend un aimant permanent (12) placé à l'intérieur d'une pièce d'extension tubulaire (11) constituée d'une matière non aimantable, une pièce de connexion (9) ayant des orifices pour recevoir des vis de fixation (10) bloquant la pièce d'extension tubulaire (11), la pièce de connexion étant adaptée à connecter l'aimant permanent (12) et un arbre rotatif (8), et des billes de roulement (1) pressées contre la surface de la pièce (2) par l'action collective de l'arbre magnétique à extrémité effilée et de la bobine magnétique, pour un usinage par la force magnétique de l'aimant permanent (12), et il comporte un système de lubrification par quantité minimale d'huile comprenant une buse de pulvérisation pneumatique (6), adaptée à diminuer le frottement et à éliminer les contaminants.
  4. Appareil suivant la revendication 3, caractérisé en ce que sa pièce d'extension tubulaire (11) comporte au moins un orifice.
  5. Appareil suivant la revendication 3 ou 4, caractérisé en ce qu'il existe une connexion non amovible entre la pièce de connexion (9) et l'arbre (8).
  6. Appareil suivant la revendication 3 ou 4, caractérisé en ce que la pièce de connexion (9) et l'arbre (8) sont connectés de manière amovible.
  7. Appareil suivant l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comprend des billes de roulement aimantables (1) recouvertes d'un revêtement dur.
  8. Procédé pour l'ébavurage et le brunissage au rouleau de pièces en utilisant un appareil suivant la revendication 1 ou 2, comprenant les étapes de production d'un champ magnétique d'intensité ajustable pour presser des billes dures de roulement résistantes à l'abrasion (1) contre la surface à usiner et à déplacer la pièce (2) tout en faisant rouler simultanément les billes de roulement (1) sur la surface et les bords ébavurés de la pièce, en suivant de manière souple les irrégularités de surface de cette pièce.
  9. Procédé suivant la revendication 8, caractérisé en ce que l'ébavurage et le brunissage au rouleau sont effectués en une seule opération, sans la nécessité d'une étape ultérieure de brunissage au rouleau.
  10. Procédé suivant l'une des revendications 8 et 9, caractérisé en ce qu'une lubrification par atomisation pneumatique avec une quantité minimale d'huile est effectuée pour lubrifier et décaper la pièce (2), pour diminuer le frottement et protéger la pièce (2) contre la contamination, les fragments d'ébavurage séparés étant en même temps chassés de la surface de la pièce (2).
EP05718152A 2004-02-27 2005-02-24 Dispositif et procede d'ebavurage et de brunissage de pieces mecaniques Active EP1727648B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
HU0400484A HU0400484D0 (en) 2004-02-27 2004-02-27 Method and apparatus for burr grinting and face rolling of members
HU0500231A HU227622B1 (en) 2005-02-22 2005-02-22 Method and apparatus for burr grinting and face rolling of members
PCT/HU2005/000020 WO2005082573A1 (fr) 2004-02-27 2005-02-24 Dispositif et procede d'ebavurage et de brunissage de pieces mecaniques

Publications (2)

Publication Number Publication Date
EP1727648A1 EP1727648A1 (fr) 2006-12-06
EP1727648B1 true EP1727648B1 (fr) 2012-12-05

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EP (1) EP1727648B1 (fr)
WO (1) WO2005082573A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112157485A (zh) * 2020-09-23 2021-01-01 厦门大学 三维驱动下的球工具磁流变研抛装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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KR100899882B1 (ko) * 2008-02-26 2009-05-29 (주) 명도산업조명 조도 조절이 가능한 가로등 고정 장치
FR2944463B1 (fr) * 2009-04-17 2012-07-20 C T I F Ct Tech Des Ind De La Fonderie Procede de renforcement d'une piece metallique presentant une surface brute ou ebauchee.
CN103600289B (zh) * 2013-10-17 2018-03-20 苏州好特斯模具有限公司 一种分流板流道孔的抛光方法
CN107584413B (zh) * 2017-10-24 2019-11-22 中国电子科技集团公司第四十八研究所 一种基于龙门刨床的拉丝设备
CN115122226A (zh) * 2022-07-11 2022-09-30 内蒙古工业大学 一种永磁场旋转磨削加工装置

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RU2068768C1 (ru) * 1989-08-22 1996-11-10 Александр Михайлович Довгалев Инструмент для упрочняющей обработки
RU2077416C1 (ru) 1990-10-08 1997-04-20 Александр Михайлович Довгалев Инструмент для поверхностного пластического деформирования
RU2077417C1 (ru) 1991-01-30 1997-04-20 Александр Михайлович Довгалев Инструмент для отделочно-упрочняющей обработки
RU2068770C1 (ru) * 1991-03-29 1996-11-10 Александр Михайлович Довгалев Способ поверхностного пластического деформирования и инструмент для его осуществления
AU2001253823A1 (en) * 2000-03-01 2001-09-12 Lambda Research, Inc. Method for reducing tensile stress zones in the surface of part
DE20200926U1 (de) 2002-01-23 2002-04-18 Hegenscheidt Mfd Gmbh & Co Kg Festwalzgerät einer Festwalzmaschine für Kurbelwellen
DE10308124B3 (de) 2003-02-26 2004-09-23 Hegenscheidt-Mfd Gmbh & Co. Kg Verfahren zum Festwalzen von Übergängen zwischen Lagerzapfen und Wangen von Kurbelwellen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112157485A (zh) * 2020-09-23 2021-01-01 厦门大学 三维驱动下的球工具磁流变研抛装置

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EP1727648A1 (fr) 2006-12-06
WO2005082573A1 (fr) 2005-09-09

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