EP3156643B1 - Procédé de fabrication de plaques de commande d'une machine hydraulique - Google Patents

Procédé de fabrication de plaques de commande d'une machine hydraulique Download PDF

Info

Publication number
EP3156643B1
EP3156643B1 EP16187567.9A EP16187567A EP3156643B1 EP 3156643 B1 EP3156643 B1 EP 3156643B1 EP 16187567 A EP16187567 A EP 16187567A EP 3156643 B1 EP3156643 B1 EP 3156643B1
Authority
EP
European Patent Office
Prior art keywords
notch
control
control panel
control plate
axial piston
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.)
Active
Application number
EP16187567.9A
Other languages
German (de)
English (en)
Other versions
EP3156643A1 (fr
Inventor
Didier Angeloz
Mathias Rauschenberger
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.)
Liebherr Machines Bulle SA
Original Assignee
Liebherr Machines Bulle SA
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 Liebherr Machines Bulle SA filed Critical Liebherr Machines Bulle SA
Publication of EP3156643A1 publication Critical patent/EP3156643A1/fr
Application granted granted Critical
Publication of EP3156643B1 publication Critical patent/EP3156643B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0655—Valve means
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2042—Valves

Definitions

  • the invention relates to a manufacturing method for a control plate for a hydraulic machine, in particular an axial piston machine.
  • the present invention further comprises an axial piston machine, in particular an axial piston pump or axial piston motor, with at least one control plate which was manufactured according to the method on which the invention is based.
  • Control plates of hydraulic machines are used to control the hydraulic or pneumatic flows within the machine.
  • the control plate provides several openings, also referred to as kidneys, the resulting volume flows depending on the angle of rotation of the control plate.
  • further fine control elements usually in the form of notches and continuous openings, are provided.
  • the function of the control plate is described using the example of a swash plate axial piston pump.
  • the required control plate is mounted on the drive shaft between the connection plate and the engine cylinder.
  • the geometry and position of the high-pressure kidneys of the control plate define the angle of rotation ranges for a given cylinder kidney shape, to which, firstly, a respective engine cylinder with the low-pressure side of the Oil circuit is connected, so that by the movement of the engine piston (along its longitudinal axis out of the engine cylinder) hydraulic oil can be sucked into the corresponding hydraulic cylinder, and secondly, the respective engine cylinder is connected to the high pressure side of the oil circuit when the engine continues to rotate accordingly, whereby the Hydraulic oil is pressed into the high pressure oil circuit in the course of the corresponding engine piston movement taking place in the opposite direction.
  • the cause of these variables is the pressure curve of the delivery flow in the individual engine pistons.
  • a significant influence on the sizes can be made by suitable modifications of the basic geometry of the control plate. Geometrical features that determine the transition from low pressure to high pressure - compression - and the transition from high pressure to low pressure - decompression - are particularly important.
  • the unwanted mechanical and hydraulic excitations occur primarily in the so-called reversing areas.
  • the geometry of these fine control elements, i.e. the control notch and relief opening, should influence the pressure and flow curves in order to specifically suppress unwanted mechanical and hydraulic excitations.
  • the openings of the high pressure kidney have been made by cutting using conventional drilling, eroding or similar processes. Relief and control notches are also machined using grinding, milling, eroding or similar processes.
  • the control plate has a through opening, the radially inner edge of the control plate being designed as a centering surface which centers the control plate on a centering body formed on the housing side.
  • the centering surface consists of several partial surfaces which are formed on segments of the inner edge of the control plate which extend radially inward into the through opening, the segments being separated by recesses.
  • a radial enlargement takes place in the hot forging process or by a machining process.
  • the control openings are preferably punched, it being possible for the punching to take place in the warm or in the cold state.
  • the sealing surroundings are machined in a machining production process, for example by lapping.
  • the main idea of the present invention is that bores for the production of the control plate are largely avoided.
  • the modification preferably includes the introduction of openings and / or kidneys and / or any fine control elements.
  • the blank in its basic shape can be plate-shaped or disk-shaped. This is preferably first cut out of a metal material.
  • other shapes and manufacturing processes for the blank are conceivable.
  • Non-cutting production offers options for extensive modifications to the openings or notches to be provided.
  • finer geometries can be created without having to accept increasing complexity of the manufacturing process. Due to the non-cutting production, in particular forms of fine control elements are conceivable which, due to the problems mentioned at the beginning, are not possible or can only be implemented with considerable additional effort by cutting processes.
  • the post-processing of the control plate includes the production of one or more openings through the control plate.
  • openings are known as kidneys, in particular high pressure or suction kidneys.
  • the introduction of a centering opening by means of non-cutting machining, which is arranged centrally in the control plate, is also conceivable.
  • the centering opening is used to accommodate a drive shaft of the hydraulic machine.
  • one or more relief openings can be introduced by the method.
  • control plate can be provided with at least one fixing cutout during post-processing, preferably in the form of a groove-like recess on the peripheral edge of the control plate.
  • the fixing cutout serves, on the one hand, to fix it against unintentional rotation of the control plate relative to the axial piston machine, in particular relative to the connection plate of the machine.
  • the fixing cutout is also suitable as an assembly aid, in that the recess serves as a guide for a protruding bolt of the connection plate.
  • the non-cutting machining takes place by embossing or pre-embossing with simultaneous material displacement.
  • This manufacturing variant is that the pre-embossing / embossing simultaneously achieves material compression at the machined points of the control plate blank, whereby the material strength increases at the corresponding material points.
  • the material compression also causes the metal fibers to be aligned, which also increases the component strength. Overall, this increases the crack resistance of the control plate, in particular the strength of the control plate is optimized in the area of the reworked shapes.
  • embossing is particularly preferably used to produce the above-mentioned notches.
  • the embossing process here pre-embossing, is supplemented by a subsequent punching process in order to achieve an opening that extends through the material thickness of the control plate.
  • the introduction of the one or more relief and / or control notches and / or at least one blind hole is achieved by means of embossing and displacing material.
  • the centering opening and / or at least one kidney, in particular the main or suction kidney, and / or at least one relief opening and / or a fixation cutout are made by means of pre-embossing and subsequent punching.
  • the work steps embossing or pre-embossing for the production of the opening or notch elements can be introduced in a common work step. It is also useful to when the subsequent punching can be carried out on the workpiece without having to clamp or re-clamp it in the production machine.
  • the punching step is preferably carried out immediately after the stamping or pre-stamping step.
  • At least one upper side, preferably both surfaces of the control plate is or will be ground after the production of the high-pressure kidneys and the fine control elements.
  • the embossing depth of at least one notch is selected in such a way that the resulting length of the notch on the surface of the control plate remains constant even after the grinding process.
  • the embossing depth of the at least one notch is greater than the material removal from the surface achieved by the grinding process.
  • the embossing depth of the control notch over its longitudinal extent.
  • the area with deeper embossing penetration into the control plate blank is referred to as a blind hole, a relief opening being created on the surface of the control plate opposite the notch preferably by punching through the blind hole.
  • any contours of the control plate without radii can be produced. Such radii had to be accepted due to manufacturing reasons when milling the control plates. Embossing with optional punching also allows the control plate to be shaped without radii. Particularly preferably, at least one notch with an angular shape is embossed, for example with a tapered notch end, preferably in the area of a relief opening, and / or with a rectangular notch shape, in particular a rectangular transverse groove in the area around a relief opening.
  • the invention also relates to a control plate for a hydraulic machine, in particular an axial piston machine, with one or more high pressure and / or suction ports and at least one notch, in particular a relief and / or control notch, the at least one notch being a pointed longitudinal groove or a rectangular Forms transverse groove on at least one surface of the control plate.
  • the control plate can preferably be manufactured according to the method according to the invention.
  • the invention also relates to a control plate for a hydraulic machine, in particular an axial piston machine, particularly preferably an axial piston pump or axial piston motor, which was manufactured according to a method of the present invention.
  • the present invention relates to an axial piston machine, in particular an axial piston pump or an axial piston motor, with at least one control plate manufactured according to the method according to the invention.
  • the control plate or the axial piston machine is accordingly distinguished by the same advantages and properties as have already been explained in more detail using the method according to the invention. For this reason, a repetitive description is dispensed with.
  • the exemplary embodiment shows a control plate 1 according to the invention, which is suitable for installation in an axial piston machine between the engine cylinders and the connection plate.
  • the main function of the control plate 1 is to supply the engine cylinders of the axial piston pump with hydraulic oil. Due to the geometry and the position of the high pressure kidneys 3 for a given cylinder kidney shape, the control plate 1 defines the angle of rotation ranges to which a respective engine cylinder is connected to the low pressure side of the oil circuit. As a result, the movement of the engine piston (along its longitudinal axis out of the engine cylinder) hydraulic oil can be sucked into the corresponding hydraulic cylinder. When the engine continues to rotate, the respective engine cylinder is also connected to the high pressure side of the oil circuit, whereby the hydraulic oil is pressed into the high pressure oil circuit in the course of the corresponding engine piston movement in the opposite direction.
  • Figure 1 shows a top view of side 1a of the control plate 1 according to the invention facing the engine cylinder of an axial piston pump.
  • the control plate 1 shown comprises a centrally arranged centering opening 6 as well as a total of four high-pressure kidneys 3 and a larger-sized suction kidney 5, the kidneys all being elongated holes through the control plate 1 are shaped.
  • the size of the high pressure kidneys 3 is identical, the dimensions of the suction kidney 5, in contrast, are significantly larger, ie longer.
  • the suction kidney 5 extends over the ring area of the control plate 1 opposite the centering opening 6.
  • a control notch 2 extends in the first intermediate area, which directly adjoins the end of the outer high pressure kidney 3 and extends in the direction of the suction kidney 5.
  • a relief opening 4 is provided in the intermediate area between the high pressure kidney 3 and suction kidney 5 on the other side of the centering opening.
  • FIG. 1 A top perspective view of the Figure 1 underlying surface 1b of the control plate 1 is in the Figure 4 reproduced. In the installation position within the axial piston pump, this surface 1b faces the connection plate.
  • the high pressure kidneys 3 and the suction kidneys 5 can also be seen in the area of the relief opening on the surface 1a of the control plate 1, the relief notch 8 with the groove-like depression at the end to form a blind hole 9 lies on the underside.
  • the blind hole 9 opens into the relief opening 4.
  • a cutout 7 is provided in the area of the suction kidney 5 on the outer circumference, which is a recess in the circumference of the control plate 1.
  • the cutout 7 fulfills two functions. On the one hand, it represents an assembly aid in that the correct installation position with the correct angle between the control plate and the axial piston pump is enforced by plugging the cutout onto a protruding bolt on the connection plate. On the other hand, a fixation of the control plate is achieved at the same time during pump operation and this is secured against unintentional rotation during operation.
  • control plate 1 which is essentially formed from the illustrated control plate 1 without the openings or notches 2-9
  • the control plate 1 according to the invention is produced according to FIGS Figures 1 to 5 produced.
  • the high pressure kidneys 3 and the suction kidney 5, the centering opening 6 as well as the relief opening 4 and the cutout 7 for fixing the control plate 1 are produced by a combination of pre-embossing and punching.
  • the production of the control and relief notches 2, 8, on the other hand, is achieved by simple stamping.
  • the embossing makes it possible to form fine control elements that are not possible using machining processes or can only be implemented with considerable effort.
  • the production of openings by embossing and then punching through enables shapes that can only be implemented with considerable additional effort using machining processes.
  • the embossing included in the manufacturing process i.e. the production of the notches 2, 5 by embossing and the production of openings 3, 5, 6, 7 by pre-embossing with subsequent punching, also leads to material compression on the material surfaces 1 a, newly created by machining the control plate blank 1b of the completed control plate 1.
  • the material compression also results in an alignment of the Metal fibers, which, like the material compression itself, result in a higher component strength. In particular, the crack resistance of the control plate 1 increases.
  • FIG. 2a shows a detailed view of the control notch 2, which adjoins the edge of a high pressure kidney 3.
  • the control notch represents a depression in the surface 1 a of the control plate 1, which continues in the longitudinal direction of the high pressure kidney 3 and is oriented in the direction of the suction kidney 5.
  • the free end of the control notch 2 has two side edges 2a, 2b which are at right angles to one another.
  • the depth of penetration of the control notch 2 into the control plate 1 can decrease exponentially starting from the high pressure kidney 3 in the direction of the free end, ie the bottom of the control notch can show a concave or convex course.
  • the bottom can be straight, as shown on the basis of the sectional view of FIG Figure 2b can be seen along the cutting axis BB, ie the notch 2 shows a constantly decreasing penetration depth.
  • the pointed end of the control notch 2 with the side edges 2a, 2b can only be produced by the production method according to the invention (embossing & punching), since the conventional production method using a milling cutter always results in a radius in the end area of the notch.
  • the entire surface area 1a, 1b of the control plate 1 must be ground so that the dimensional accuracy and surface quality that can be achieved are sufficient. For this reason, the minimum embossing depth of the control notch 2 must be selected to be at least so deep that the length l of the control notch 2 does not become smaller during the subsequent material removal by the grinding process.
  • Figure 3 a detailed view of the high pressure kidney 3 in connection with the control notch 2 is shown again.
  • the thickness a corresponds to the original thickness of the control plate 1
  • b represents the thickness of the control plate 1 after the grinding process. It can be seen in this context that the minimum depth of the embossing of the control notch 2 extends deeper into the control plate than the material removal achieved by the grinding process. As a result, the length I of the control notch 2 does not change by the grinding process.
  • FIGS. 5a, 5b again show detailed views of the underside 1b of the control plate 1 with the relief notch 8 and the relief opening 4.
  • the illustration of FIG Figure 5a shows a detailed view of the surface 1b in the area of the relief notch 8. It can be seen here that the end of the notch 8 protrudes deeper into the control plate 1 on the side facing the main groove 3 and thereby forms the blind hole 9.
  • the blind hole 9 of the relief notch 8 opens into the relief opening 4 of the surface 1a.
  • a sectional view through the relief notch 8 in the area of the blind hole 9 along the section line EE shows Figure 5b .
  • the channel formed by the surface 1b accordingly tapers in the direction of the surface 1a.
  • the relief notch 8 including the blind hole 9 is embossed. The metal is then pierced by punching in the center of the material hole 9 and the relief opening 4 is created.
  • FIG. 6 Another embodiment of a control plate is the Figure 6 refer to.
  • the side 10a of the control plate 10 facing the engine cylinder of an axial piston pump is essentially the same as the control plate 1 according to FIG Figure 1 . Identical features are therefore provided with identical reference symbols.
  • the only difference between the control plate 10 and the control plate 1 is that the relief opening 4 is provided on the side 10a with an additional notch-like recess 40 (additional relief notch). Starting from the relief opening 4, this recess 40 converges to a point in the direction of the high pressure kidney 3.
  • the underside 10b of the control plate 10 corresponds in its design to the underside 1b of the control plate 1 according to FIG Figure 4 .
  • the width of the recess 40 at the beginning corresponds to the width of the relief opening and converges to a point in the direction of the high pressure kidney 3.
  • This shape of the recess 40 which converges to a point, is only made possible by the production method according to the invention by means of embossing and punching.
  • the novel shape in the area of the relief opening 4 shows certain advantages in operation. Cavitation clearly leads to an uncontrolled change in geometry. Damage in the area of the relief opening due to cavitation is significantly reduced due to the depression 40.
  • FIG Figure 8 Another alternative embodiment of the control plate is shown in FIG Figure 8 shown.
  • This control plate 100 also differs from the control plate 1, 10 only in the design of the relief opening 4 on the side 100a.
  • a rectangular transverse groove 400 is formed around the relief opening 4, which also serves as an additional relief notch 400 on the side 100a.
  • the rectangular shape of the additional transverse groove 400 is shown in the plan view Figure 9a as well as in the sectional view according to Figure 9b can be seen along the section axis EE.
  • the embossing 400 shown here can of course take place in a precisely defined manner.
  • a rectangular shape of the transverse groove 400 can be produced by the embossing process, since this avoids undesired radii at the corner points.
  • control plates 1, 10, 100 were limited to the pump operation of the axial piston unit. Such a control plate 1, 10, 100 could of course also be used for engine operation.

Claims (11)

  1. Procédé de fabrication d'une plaque de commande (1) pour une machine hydraulique, en particulier une machine à pistons axiaux, une ébauche de plaque de commande étant fabriquée en métal puis la géométrie de l'ébauche de plaque de commande étant modifiée par fabrication sans enlèvement de copeaux pour la réalisation des fonctions de commande, la modification comprenant la fabrication d'un ou plusieurs orifices traversants,
    caractérisé en ce que
    le formage sans enlèvement de copeaux comprend l'étape de travail de l'estampage/pré-estampage en liaison avec un refoulement de matière, les orifices traversant la plaque de commande (1) étant en plus percés par poinçonnage après le pré-estampage.
  2. Procédé selon la revendication 1, caractérisé en ce que la modification comprend la fabrication d'un ou de plusieurs reins (3, 5) et/ou d'un orifice de centrage (6) et/ou d'un ou de plusieurs orifices de décharge (4) et/ou d'une ou de plusieurs encoches (2, 8, 40), par exemple une ou plusieurs encoches de décharge et/ou de commande (2, 8), et/ou d'un ou de plusieurs trous borgnes (9), et/ou au moins d'une découpe de fixation (7) pour la fixation de la plaque de commande (1).
  3. Procédé selon la revendication 2, caractérisé en ce que la mise en œuvre de la ou des encoches de décharge et/ou de commande (2, 8, 40) et/ou d'au moins un trou borgne (9) est effectuée par estampage et refoulement de matière.
  4. Procédé selon l'une des revendications précédentes 2 à 3, caractérisé en ce que la mise en œuvre de l'orifice de centrage (6) et/ou d'au moins un rein (3, 5) et/ou d'au moins un orifice de décharge (4) et/ou d'une découpe de fixation (7) est effectuée par pré-estampage et poinçonnage subséquent.
  5. Procédé selon l'une des revendications précédentes 3 ou 4, caractérisé en ce que l'étape de procédé d'estampage/pré-estampage est effectuée en une étape de travail et un poinçonnage subséquent est effectué de préférence sans nouveau serrage de la pièce directement après l'estampage/pré-estampage.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'au moins une surface (1a, 1b) de la plaque de commande (1) est rectifiée après l'estampage/pré-estampage et le poinçonnage.
  7. Procédé selon la revendication 6, caractérisé en ce que la profondeur d'estampage d'au moins une encoche (2, 8, 40), en particulier de l'encoche de commande (2), est supérieure à l'enlèvement sur la surface (1a, 1b) obtenu par le processus de rectification, de telle sorte que la longueur de l'au moins une encoche (2, 8, 40), en particulier de l'encoche de commande (2), reste constante malgré le processus de rectification.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que la profondeur d'estampage de l'encoche de décharge (8) varie, la zone avec pénétration plus profonde dans l'ébauche de plaque de commande étant définie comme trou borgne (9), un orifice de décharge (4) étant réalisé de préférence par poinçonnage du trou borgne (9).
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que des contours et/ou des creux sont fabriqués sans rayon sur la surface de plaque de commande (1a, 1b), une encoche (2, 8, 40) de forme polygonale, par exemple avec une extrémité d'encoche rétrécissant en pointe et/ou une forme d'encoche rectangulaire, étant de préférence fabriquée.
  10. Plaque de commande (1) pour une machine hydraulique, en particulier une machine à pistons axiaux, qui a été fabriquée par le procédé selon l'une des revendications précédentes, comprenant un ou plusieurs reins à haute pression et/ou d'aspiration (3, 5) ainsi qu'au moins une encoche (2, 8, 40), en particulier une encoche de décharge et/ou de commande (2, 8),
    caractérisée en ce que
    l'au moins une encoche (2, 8, 40) forme une rainure longitudinale rétrécissant en pointe ou une rainure transversale rectangulaire sur au moins une surface (1a, 1b) de la plaque de commande (1), le contour de l'au moins une encoche (2, 8, 40) ne présentant pas de rayon dans les coins.
  11. Machine à pistons axiaux, en particulier pompe à pistons axiaux ou moteur à pistons axiaux, comprenant au moins une plaque de commande (1) selon la revendication 10.
EP16187567.9A 2015-10-15 2016-09-07 Procédé de fabrication de plaques de commande d'une machine hydraulique Active EP3156643B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01520/15A CH711662A1 (de) 2015-10-15 2015-10-15 Herstellungsverfahren für Steuerplatten einer hydraulischen Maschine.

Publications (2)

Publication Number Publication Date
EP3156643A1 EP3156643A1 (fr) 2017-04-19
EP3156643B1 true EP3156643B1 (fr) 2021-03-24

Family

ID=57240786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16187567.9A Active EP3156643B1 (fr) 2015-10-15 2016-09-07 Procédé de fabrication de plaques de commande d'une machine hydraulique

Country Status (2)

Country Link
EP (1) EP3156643B1 (fr)
CH (1) CH711662A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113906212A (zh) * 2019-06-26 2022-01-07 丹佛斯动力系统Ii技术有限公司 用于流体泵的阀板

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2047557A1 (de) * 1969-10-06 1971-04-22 VEB Kombinat Orsta Hydraulik Be trieb Industnewerke Karl Marx Stadt, χ 9030 Karl Marx Stadt Hydrostatische Kolbenmaschine
DE3140339A1 (de) * 1981-10-10 1983-04-28 Goetze Ag, 5093 Burscheid Steuerscheibe fuer hydromotoren und ihr herstellungsverfahren
EP0301310A1 (fr) * 1987-07-30 1989-02-01 BRUENINGHAUS HYDRAULIK GmbH Machine à piston axiaux du type à plateaux ou axes inclinés avec des lumières de distribution et des canaux de compensation de pression
US6981321B1 (en) * 2003-09-29 2006-01-03 Sauer-Danfoss Inc. Hydrostatic cylinder block and method of making the same
DE102007008049A1 (de) * 2007-02-17 2008-08-21 Thyssenkrupp Vdm Gmbh Gleitender Reibung ausgesetztes Bauteil

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR956823A (fr) * 1944-10-30 1950-02-08
US4550645A (en) * 1984-04-27 1985-11-05 Sundstrand Corporation Thin valve plate for a hydraulic unit
JPH11182410A (ja) * 1997-12-24 1999-07-06 Nachi Fujikoshi Corp 多連ピストンポンプ及びバルブプレート及びその製造方法
US6196109B1 (en) * 1998-11-16 2001-03-06 Eaton Corporation Axial piston pump and improved valve plate design therefor
IT1319854B1 (it) * 2000-02-22 2003-11-03 Embraco Europ Srl Procedimento per la fabbricazione di una piastra valvolare dicompressore, piastra valvolare ottenuta con il procedimento, gruppo
DE10200545A1 (de) * 2001-12-11 2003-06-26 Liebherr Machines Bulle S A Steuerplatte für Hydromotoren und -pumpen vom Axialkolbentyp sowie Verfahren zu ihrer Herstellung
DE10251552C5 (de) * 2002-11-05 2010-07-15 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine und Steuerplatte für eine Axialkolbenmaschine
JP5478577B2 (ja) * 2011-09-27 2014-04-23 株式会社豊田自動織機 圧縮機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2047557A1 (de) * 1969-10-06 1971-04-22 VEB Kombinat Orsta Hydraulik Be trieb Industnewerke Karl Marx Stadt, χ 9030 Karl Marx Stadt Hydrostatische Kolbenmaschine
DE3140339A1 (de) * 1981-10-10 1983-04-28 Goetze Ag, 5093 Burscheid Steuerscheibe fuer hydromotoren und ihr herstellungsverfahren
EP0301310A1 (fr) * 1987-07-30 1989-02-01 BRUENINGHAUS HYDRAULIK GmbH Machine à piston axiaux du type à plateaux ou axes inclinés avec des lumières de distribution et des canaux de compensation de pression
US6981321B1 (en) * 2003-09-29 2006-01-03 Sauer-Danfoss Inc. Hydrostatic cylinder block and method of making the same
DE102007008049A1 (de) * 2007-02-17 2008-08-21 Thyssenkrupp Vdm Gmbh Gleitender Reibung ausgesetztes Bauteil

Also Published As

Publication number Publication date
CH711662A1 (de) 2017-04-28
EP3156643A1 (fr) 2017-04-19

Similar Documents

Publication Publication Date Title
DE60019929T2 (de) Bohrer mit drei schneidkanten
DE102017123786A1 (de) Halter für ein Nutstoßwerkzeug
DE102012016660A1 (de) Einlippenbohrer
EP2091681B2 (fr) Plaquette de coupe pour un outil de tournage et procédé d'usinage avec cette plaquette de coupe
DE102007024174B4 (de) Axialkolbenmaschine mit einer Verdrehsicherung für die Steuerplatte
WO2007096336A1 (fr) Dispositif et procede de réalisation d'une decoupe en forme de calotte dans une piece par enlevement de matiere
DE10300070A1 (de) Axialkolbenmaschine, Rückzugplatte und Verfahren zum Herstellen einer Rückzugplatte
EP3156643B1 (fr) Procédé de fabrication de plaques de commande d'une machine hydraulique
DE10251552C5 (de) Axialkolbenmaschine und Steuerplatte für eine Axialkolbenmaschine
DE102006015367B4 (de) Drehantreibbares Werkzeug zur Herstellung von Gewinden
EP3501767A1 (fr) Dispositif et procédé de changement
EP3085492B1 (fr) Outil de rectification
DE102015206716A1 (de) Schrägscheibenmaschine
EP3797911B1 (fr) Fraise à queue et son procédé de fabrication
EP2976174B1 (fr) Élément d'alésage et alésoir et sa méthode de production
DE102009040510A1 (de) Rotor für eine Pumpe
DE102008056782A1 (de) Entgratreibahle
DE102008049515B4 (de) Verfahren zur spanenden Bearbeitung von Werkstückflächen an Werkstücken, insbesondere an Kurbelwellen, sowie Schneidplatte zur Durchführung eines solchen Verfahrens
EP3284558A1 (fr) Procédé d'usinage d'un piston
EP4241948A1 (fr) Agrégat pour l'usinage d'une surface de chant d'un panneau en matériau dérivé du bois et procédé d'usinage
WO2020207937A1 (fr) Compresseur à pistons alternatifs
DE102008049516B4 (de) Verfahren zur spanenden Bearbeitung von Werkstückflächen an Werkstücken, insbesondere an Kurbelwellen, sowie Schneideinsatz zur Durchführung eines solchen Verfahrens
WO2009109283A1 (fr) Carter de moteur oscillant
EP1900452A1 (fr) Procédé de renforcement d'un paroi d'une garniture tridimensionnelle
EP1561031A1 (fr) Moteur a pistons axiaux, plateau oscillant et procede de fabrication d'un plateau oscillant

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20171016

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20190808

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 502016012646

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: F03C0001340000

Ipc: F03C0001060000

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: F03C 1/06 20060101AFI20200925BHEP

Ipc: F04B 1/20 20200101ALI20200925BHEP

INTG Intention to grant announced

Effective date: 20201019

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LIEBHERR MACHINES BULLE SA

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502016012646

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1374736

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210415

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210624

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210625

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210624

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20210324

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210726

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210724

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502016012646

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

26N No opposition filed

Effective date: 20220104

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210930

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20210907

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210724

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210907

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210907

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210907

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210930

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1374736

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210907

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210907

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20160907

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210324

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20230928

Year of fee payment: 8