EP2315944A2 - Machine à piston axial - Google Patents

Machine à piston axial

Info

Publication number
EP2315944A2
EP2315944A2 EP09741195A EP09741195A EP2315944A2 EP 2315944 A2 EP2315944 A2 EP 2315944A2 EP 09741195 A EP09741195 A EP 09741195A EP 09741195 A EP09741195 A EP 09741195A EP 2315944 A2 EP2315944 A2 EP 2315944A2
Authority
EP
European Patent Office
Prior art keywords
axial piston
components
welding
drive part
compression part
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Withdrawn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
EP09741195A
Other languages
German (de)
English (en)
Inventor
Stefan Malm
Renald KÜMPEL
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.)
Neumayer Tekfor Holding GmbH
Original Assignee
Neumayer Tekfor Holding GmbH
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 Neumayer Tekfor Holding GmbH filed Critical Neumayer Tekfor Holding GmbH
Publication of EP2315944A2 publication Critical patent/EP2315944A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49249—Piston making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49249—Piston making
    • Y10T29/49252—Multi-element piston making
    • Y10T29/49254—Utilizing a high energy beam, e.g., laser, electron beam

Definitions

  • the invention relates to an axial piston for an axial piston machine.
  • Axial piston machines are known, for example, from WO 2006/056167 A1.
  • Such axial piston machines are used in particular in motor vehicles as air conditioning compressors and are rotationally driven from the outside, wherein an inclined to the axis of the rotary drive pivot ring or the like engages in a drive part of the axial piston and the axial piston during a rotational movement of the rotary drive parallel to the axis of rotation reciprocates.
  • the compressed part of the axial piston guided in a cylinder compresses the working medium of the axial piston machine.
  • Axial piston for the axial piston machines are for this purpose usually produced as cast or sintered parts or in two parts from the drive part and the compression part. For this purpose, individual parts are used, which are joined by means of laser or friction welding. Partially axially formed lugs are provided for receiving the sleeve-shaped compression part on the drive part, which are expensive to manufacture.
  • the invention is achieved by an axial piston for an axial piston machine, which is manufactured from at least two components forming a drive part and a compression part, wherein the components are each manufactured by means of a massive forming method and with each other connected by a capacitor discharge welding process.
  • a massive forming process the components can be manufactured as cost-effective mass-produced, which allow depending on the type used sufficient precision of the components without or with a post-processing.
  • different types of material for example differently alloyed steels, can be used. Cold extrusion methods have proven to be particularly advantageous in which the components are produced inexpensively in high quantities at ambient temperature in the desired form.
  • a blunt welding of the compression part has proven on the drive part.
  • the end face of the compression part is joined as a welding surface with a complementary welding surface of the drive part, so that it is possible to dispense with further axial projections and overlapping regions on the drive part. Due to the short-term heat input during welding by means of the capacitor discharge welding process, no distortion of the components and no embrittlement of the welding surface, so that the welding surfaces and thus the walls of the components only dependent on the requirements of the axial piston and not dependent on the conditions for the welding can be designed so that overall the axial piston can be made lighter.
  • the axial piston may be formed of heat-treated, for example, surface-hardened components. A nitriding has proved to be advantageous here. Such a heat treatment is preferably carried out after welding, since, for example, the free end already welded to the drive part of the thus completely closed compression part suffers no or only negligible heat distortion.
  • the invention further comprises an axial piston machine with one or more axial piston according to the features described above. According to an inventive method, the production of an axial piston from at least two components forming a drive part and a compression part takes place at least according to the following essential steps:
  • the axial piston 1 is in the embodiment shown in two parts from the components 2, 3, which form a compression part 4 and a drive part 5, made.
  • the compression part 4 is rotationally symmetrical about the axis of rotation 6 as a cylindrical component 2, preferably by means of a cold extrusion process, for example, in a deep-drawing process or in a Nap Wegück- downstream extrusion process produced.
  • the free end of the compression part 4 has an end face 7, the tool falling or preferably after machining machining a welding surface 8 to the addition of the drive part 5 forms.
  • the drive member 5 receives in an impression 9 the inclined swivel ring or swivel arm or the like of the rotary drive of the axial piston and is designed according to their structural design. Accordingly, the drive part 5 is produced by means of a massive forming process, wherein cold, warm or hot forming, for example, extrusion molding and / or bending process can be used.
  • the drive part 5 receives the compression part 4 at its substantially planar outer periphery 10, wherein this has a tool-dropping or preferably machined produced, to the welding surface 8 of the compression part 4 complementary welding surface 11.
  • the surface of the components 2, 3 may be post-treated in addition to the representation of the welding surfaces 8, 11 to achieve a higher surface quality.
  • the surfaces 12, 13 of one or both components 2, 3 or the components 2, 3 may be partially or completely subjected to a heat treatment.
  • This heat treatment may result in surface hardening and be carried out using appropriate environmental conditions.
  • the components 2, 3 may be nitrided or carbonitrided. It has proved to be particularly advantageous if such a heat treatment takes place after the joining of the two components 2, 3, so that the influence of heat on the free end of the compression part 4 already fixed to the drive part 5 has a reduced influence and thermal distortions can be substantially ruled out ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

L'invention concerne un piston axial destiné à une machine à piston axial, ce piston étant composé d'au moins deux éléments formant un élément d'entraînement et un élément de compression. L'invention vise à fabriquer un piston axial de poids réduit de manière simple et économique. À cet effet, les éléments sont fabriqués par un procédé de formage et assemblés par un procédé de soudage par décharge de condensateur.
EP09741195A 2008-08-22 2009-08-21 Machine à piston axial Withdrawn EP2315944A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008039294A DE102008039294A1 (de) 2008-08-22 2008-08-22 Axialkolbenmaschine
PCT/DE2009/001178 WO2010020240A2 (fr) 2008-08-22 2009-08-21 Machine à piston axial

Publications (1)

Publication Number Publication Date
EP2315944A2 true EP2315944A2 (fr) 2011-05-04

Family

ID=41566734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09741195A Withdrawn EP2315944A2 (fr) 2008-08-22 2009-08-21 Machine à piston axial

Country Status (4)

Country Link
US (1) US8267006B2 (fr)
EP (1) EP2315944A2 (fr)
DE (1) DE102008039294A1 (fr)
WO (1) WO2010020240A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9856820B2 (en) 2010-10-05 2018-01-02 Mahle International Gmbh Piston assembly
US8973484B2 (en) 2011-07-01 2015-03-10 Mahle Industries Inc. Piston with cooling gallery

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1097545A (fr) * 1977-02-02 1981-03-17 Hermann Papst Traduction non-disponible
EP0144145B2 (fr) * 1983-10-29 1994-07-06 Ae Plc Pistons
DE4429742A1 (de) * 1994-08-22 1996-02-29 Fichtel & Sachs Ag Verfahren zur Herstellung einer hohlen Kolbenstange
KR100332538B1 (ko) * 2000-04-18 2002-04-13 신영주 압축기용 중공피스톤 제조방법
DE102004044519A1 (de) * 2004-09-15 2006-03-30 Wieland-Werke Ag Gleitkörper und Verfahren zur Herstellung eines Gleitkörpers sowie dessen Verwendung
US8137078B2 (en) * 2004-11-25 2012-03-20 Ixetic Mac Gmbh Axial piston machine
WO2008014737A1 (fr) * 2006-07-29 2008-02-07 Ixetic Mac Gmbh Dispositif de couplage d'un piston à un disque annulaire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010020240A2 *

Also Published As

Publication number Publication date
US20110126702A1 (en) 2011-06-02
WO2010020240A3 (fr) 2010-04-15
DE102008039294A1 (de) 2010-02-25
WO2010020240A2 (fr) 2010-02-25
US8267006B2 (en) 2012-09-18

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