EP0708698B1 - Procede permettant de produire des pistons, des tiges de piston, ainsi que des cylindres pour unites hydrauliques et pneumatiques - Google Patents

Procede permettant de produire des pistons, des tiges de piston, ainsi que des cylindres pour unites hydrauliques et pneumatiques Download PDF

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Publication number
EP0708698B1
EP0708698B1 EP93914547A EP93914547A EP0708698B1 EP 0708698 B1 EP0708698 B1 EP 0708698B1 EP 93914547 A EP93914547 A EP 93914547A EP 93914547 A EP93914547 A EP 93914547A EP 0708698 B1 EP0708698 B1 EP 0708698B1
Authority
EP
European Patent Office
Prior art keywords
grinding
fact
hard
hydraulic
piston rods
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
EP93914547A
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German (de)
English (en)
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EP0708698A1 (fr
Inventor
Günter Weber
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Individual
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Individual
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Priority to AT93914547T priority Critical patent/ATE158973T1/de
Publication of EP0708698A1 publication Critical patent/EP0708698A1/fr
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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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • 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
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • B24B19/10—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding pistons
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces

Definitions

  • the invention relates to a method for producing pistons and piston rods and cylinders for hydraulic or pneumatic units.
  • the invention aims to provide a method that ensures a long service life of pistons or piston rods and cylinders for hydraulic or pneumatic units.
  • the process according to the invention is characterized in that a finely sized cylindrical semi-finished product made of an aluminum alloy is hard anodized on its sliding surface and that the hard anodized product rotates about its axis and the sliding surface layer formed is processed in several successive grinding operations with flat grinding media of different decreasing grain sizes, whereby the grinding operations are carried out until the dust development stops and the last grinding operation is polished until the flat grinding medium sticks.
  • the method according to the invention makes it possible to achieve a constant surface quality on a wide variety of starting surfaces, largely independently of the starting roughness.
  • a particularly long service life of the pistons and piston rods and cylinders results if the alloy AlMgSi 1 is used as the material for the semi-finished product and the anodization depth is 50 to 60 ⁇ m.
  • a cylindrical semifinished product made of the alloy AlMgSi 1 with a length of 500 mm and a diameter of just over 60 mm was clamped in a lathe and finely finished with a diamond knife to a diameter of 60 mm.
  • the finely sized semi-finished product was hard anodized on its surface 50 to 60 ⁇ m deep.
  • the hard anodized product was then clamped back into the lathe and rotated at 2500 rpm. Then five grinding operations were carried out with corundum sanding papers of the types (in this order) P 100, P 150, P 280, P 400 and P 999 (Rouge paper).
  • the type designation P 100 denotes an abrasive paper in which the sieve has 100 mesh / inch for its production.
  • Each sandpaper was mounted on a sanding block and was pressed by means of this with 50 N against the rotating product and moved along it in the axial direction. The first four sanding processes were carried out until the dust development ceased, and the last sanding process, which already corresponds to a fine polishing process, was carried out until the sanding paper stuck.
  • polishing paper instead of polishing paper, of course, any flat abrasive medium with the appropriate grit can be used.
  • the hydraulic cylinder piston rod with aluminum alloy core and surface layer produced in this way had an excellent sliding surface quality, which was easily comparable to that of hard chrome-plated piston rods.
  • the roughness depth of 0.3 ⁇ m achieved in this example is excellent for the sliding surface of a piston or a piston rod or a cylinder and does not damage the seals.
  • the method according to the invention can be carried out both by hand and by machine.
  • machine execution e.g. appropriately programmed NC machine tools equipped with grinding tools can be used.
  • Such machines can automatically carry out the necessary clamping movements and sanding paper changes.
  • the grinding parameters such as grinding pressure and duration can be controlled automatically depending on the measured values from the corresponding dust sensors.

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

Abstract

L'invention concerne un procédé permettant de produire des pistons, des tiges de piston, ainsi que des cylindres pour unités hydrauliques ou pneumatiques. La surface de glissement d'un produit semi-fini cylindrique finement usiné, réalisé dans un alliage d'aluminium, est oxydée électrolytiquement dure. Le produit oxydé électrolytiquement dur est mis en rotation autour de son axe et la couche céramique de surface de glissement obtenue est usinée en plusieurs opérations de meulage avec des éléments de meulage plats de différentes grosseurs de grains décroissantes.

Claims (4)

  1. Procédé de fabrication de pistons et de tiges de pistons ainsi que de cylindres pour des unités hydrauliques ou pneumatiques, caractérisé en ce que l'on effectue une oxydation électrolytique dure de la surface de frottement d'un demi-produit fini cylindrique en un alliage d'aluminium, en ce que l'on fait tourner autour de son axe le produit oxydé dur par électrolyse et en ce que l'on usine la couche formée de surface de frottement en plusieurs opérations successives de polissage avec des moyens abrasifs plans de différents grains de taille décroissante, sachant que l'on effectue les opérations de polissage à chaque fois jusqu'à l'arrêt du dégagement de poussière et que, lors de la dernière opération de polissage, on polit jusqu'à ce que le moyen abrasif plan reste collé.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on effectue cinq opérations de polissage avec des papiers abrasifs du type P 100, P 150, P 280, P 400 et P 999, sachant que P 100 caractérise un papier abrasif pour la fabrication duquel on a utilisé un tamis de 100 mesh.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, lors de l'opération de polissage, on fait tourner à une vitesse de 2.500 tr/min environ le produit oxydé dur par électrolyse et en ce que l'on appuie le moyen abrasif contre le produit avec une force de 50 N environ.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'on utilise comme matière première pour le demi-produit l'alliage AlMgSi 1 et la profondeur d'oxydation est de 50 à 60 µm.
EP93914547A 1993-07-14 1993-07-14 Procede permettant de produire des pistons, des tiges de piston, ainsi que des cylindres pour unites hydrauliques et pneumatiques Expired - Lifetime EP0708698B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT93914547T ATE158973T1 (de) 1993-07-14 1993-07-14 Verfahren zum herstellen von kolben und kolbenstangen sowie zylindern für hydraulik- oder pneumatikaggregate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AT1993/000119 WO1995002486A1 (fr) 1993-07-14 1993-07-14 Procede permettant de produire des pistons, des tiges de piston, ainsi que des cylindres pour unites hydrauliques et pneumatiques

Publications (2)

Publication Number Publication Date
EP0708698A1 EP0708698A1 (fr) 1996-05-01
EP0708698B1 true EP0708698B1 (fr) 1997-10-08

Family

ID=3683182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93914547A Expired - Lifetime EP0708698B1 (fr) 1993-07-14 1993-07-14 Procede permettant de produire des pistons, des tiges de piston, ainsi que des cylindres pour unites hydrauliques et pneumatiques

Country Status (5)

Country Link
US (1) US5842911A (fr)
EP (1) EP0708698B1 (fr)
JP (1) JPH09500062A (fr)
DE (1) DE59307522D1 (fr)
WO (1) WO1995002486A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011006753A1 (fr) 2009-07-13 2011-01-20 Federal-Mogul Nürnberg GmbH Procédé et dispositif d’usinage d’un piston pour un moteur à combustion interne

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2764225B1 (fr) * 1997-06-05 1999-07-23 Uranie International Piece metallique ayant une surface externe presentant un profil particulier, procede de polissage pour sa realisation et dispositif de mise en oeuvre du procede
US8690128B1 (en) 2008-07-23 2014-04-08 Lippert Components Manufacturing, Inc. Hydraulic leveling cylinder
US9073516B2 (en) * 2009-01-22 2015-07-07 Lippert Components Manufacturing Inc. Leveling jack for vehicle
CN105269250A (zh) * 2014-07-20 2016-01-27 安庆市亿豪工贸发展有限公司 一种液压活塞杆的杆端头加工工艺
JP6222571B2 (ja) 2014-09-12 2017-11-01 Smc株式会社 流体圧シリンダ
CN104985490B (zh) * 2015-06-05 2017-05-10 东莞市依诺电子科技有限公司 硬质铝合金基材的拉丝加工方法
USD813108S1 (en) * 2016-06-14 2018-03-20 Ningbo Zhongtian Hande Hydraulic Co., Ltd. Supporting cylinder for caravan

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2159551C3 (de) * 1971-12-01 1980-07-31 Julius & August Erbsloeh Gmbh + Co, 5600 Wuppertal Anwendung von Ätz-, Schleif- und Strahlverfahren zur Herstellung matter Teilbereiche auf anodisierten Aluminium-Oberflächen
DE3344004A1 (de) * 1983-12-06 1985-06-13 Leonhard 8500 Nürnberg Baur Schleif und polierverfahren
US4599827A (en) * 1985-06-24 1986-07-15 The United States Of America As Represented By The Secretary Of The Army Metallographic preparation of particulate filled aluminum metal matrix composite material
DE3636853A1 (de) * 1985-10-30 1987-05-07 Mazda Motor Seitengehaeuse fuer einen drehkolbenmotor und verfahren zu dessen herstellung
JPH08155747A (ja) * 1994-12-05 1996-06-18 Fuji Oozx Inc 傘形ワークの加工方法
DE19513254A1 (de) * 1995-04-07 1996-10-10 Schaeffler Waelzlager Kg Maschinenteil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011006753A1 (fr) 2009-07-13 2011-01-20 Federal-Mogul Nürnberg GmbH Procédé et dispositif d’usinage d’un piston pour un moteur à combustion interne
DE102009027647A1 (de) 2009-07-13 2011-01-20 Federal-Mogul Nürnberg GmbH Verfahren und Vorrichtung zur Bearbeitung eines Kolbens für einen Verbrennungsmotor

Also Published As

Publication number Publication date
US5842911A (en) 1998-12-01
WO1995002486A1 (fr) 1995-01-26
EP0708698A1 (fr) 1996-05-01
DE59307522D1 (de) 1997-11-13
JPH09500062A (ja) 1997-01-07

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