EP1265722A1 - Procede et dispositif pour diviser par rupture une piece de machine comportant un orifice de logement pour palier - Google Patents

Procede et dispositif pour diviser par rupture une piece de machine comportant un orifice de logement pour palier

Info

Publication number
EP1265722A1
EP1265722A1 EP01921303A EP01921303A EP1265722A1 EP 1265722 A1 EP1265722 A1 EP 1265722A1 EP 01921303 A EP01921303 A EP 01921303A EP 01921303 A EP01921303 A EP 01921303A EP 1265722 A1 EP1265722 A1 EP 1265722A1
Authority
EP
European Patent Office
Prior art keywords
mandrel
bearing
connecting rod
bearing eye
eye
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Withdrawn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
EP01921303A
Other languages
German (de)
English (en)
Inventor
Günter Knoll
Andreas Kalman
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.)
Motorenfabrik Hatz GmbH and Co KG
Original Assignee
Motorenfabrik Hatz GmbH and Co KG
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 Motorenfabrik Hatz GmbH and Co KG filed Critical Motorenfabrik Hatz GmbH and Co KG
Publication of EP1265722A1 publication Critical patent/EP1265722A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
    • B23D31/002—Breaking machines, i.e. pre-cutting and subsequent breaking
    • B23D31/003—Breaking machines, i.e. pre-cutting and subsequent breaking for rings
    • 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
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/10—Methods
    • Y10T225/12—With preliminary weakening
    • 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
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/30—Breaking or tearing apparatus
    • Y10T225/371—Movable breaking tool

Definitions

  • the invention relates to a method for breaking a machine component with a bearing eye, in particular a connecting rod of a reciprocating piston engine, m two bearing shells each forming one half of the bearing eye, and a device therefor.
  • a device which comprises a two-part mandrel which fills the interior of the workpiece and a wedge is driven in between the mandrel parts. Two spring elements on the outside of the workpiece are clamped together using compression screws against compression springs.
  • the arrangement of spring elements on the outer circumference of the workpiece should result in a uniform distribution of the breaking forces when the workpiece is blasted in two fractions, so that their deformation remains even if the two sides break one after the other.
  • EP-Bl 0304162 A comparable method for breaking connecting rods for reciprocating piston engines is described in EP-Bl 0304162.
  • the bearing eye is clamped transversely to the fracture plane by means of clamping jaws against a split mandrel provided in the interior of the bearing eye.
  • This clamping of the two halves of the bearing eye is maintained even after fracture separation by means of a wedge, the two sides of the bearing breaking shortly after one another.
  • By maintaining this clamping of the bearing halves between the assigned mandrel half and the corresponding clamping baking should be achieved as linearly as possible moving away the fractions after separation, so that an adverse deformation of the two bearing halves is avoided in the region of the lateral bearing legs adjacent to the fracture surface.
  • the two mandrel halves move together with the attached parts of the connecting rod, namely on the one hand the connecting rod cover and on the other hand the connecting rod on slide guides, after which the clamping is released and the broken parts of the connecting rod can be removed.
  • the two bearing halves are pulled apart transversely to the later parting plane by means of a press, with each bearing half being tension-free against the assigned half of an inner mandrel by stops lying in the separating direction and transversely thereto, and this Piston pin eye of the connecting rod is only supported laterally.
  • the bearing half connected to the connecting rod and movable on a slide is blasted off the other bearing half arranged fixed to the frame.
  • the two bearing shells remain essentially aligned with one another during fracture separation, so that constraints in the area of the bearing eye, which can lead to undesirable deformations, occur significantly less.
  • EP-A2 0507519 describes a method for producing connecting rods, according to which the two halves of the bearing eye are separated from one another by using controlled breaking forces.
  • the inside of the bearing eye the existing mandrel halves are moved apart by moving the mandrel half assigned to the connecting rod cover away from the other mandrel half while building up tensile stress in the bearing eye until it breaks.
  • the connecting rod is only spring-loaded transversely to the separating direction between stops; in addition, the connecting rod cover is resiliently supported against the separating direction; finally, the piston pin eye m is received in a stop block with lateral play so that it can carry out lateral compensating movements during cracking.
  • twists of the two fractions during the cracking in the macro range are consciously taken into account.
  • the above-described limited lateral compensation movement of the piston pin eye is intended to avoid permanent deformation of the two bearing shell halves.
  • the object of the present invention is to avoid undesired deformations of the two bearing shell halves in the area of the fracture surfaces even under the action of high fracture forces when fracture separation is used by means of a fracture wedge; the method of fracture separation should thus also be applicable for the production of connecting rods from materials with a relatively high fracture rigidity.
  • the method according to the invention consists of the method steps according to claim 1.
  • EP-Bl 0304162 a half-split mandrel is used, on which the bearing eye is attached.
  • the bearing eye is prestressed in the separating direction in that the two mandrel halves are clamped apart, similar to the solution described in EP-A2 0507519, which relates to a method in which the two mandrel halves are slow, not by a wedge stroke but by hydraulic forces and gradually move apart.
  • EP-A2 0507519 which relates to a method in which the two mandrel halves are slow, not by a wedge stroke but by hydraulic forces and gradually move apart.
  • the bearing eye is fixed in position on only one side of the intended parting plane by means of adjustable stops, the other side can easily follow small twists during breaking, so that permanent deformations are avoided. It is essential that the position is not merely elastic, but in the sense of a play-free fixing of the corresponding side of the bearing eye.
  • the present invention differs from EP-A2 0507519, where the bearing half connected to the rod of the connecting rod is also supported with play in the area of the piston pin eye, but where the connecting rod cover is supported only by flexible holding forces. As a result, it is not possible in the known method to achieve the essentially simultaneous breaking of both sides of the bearing eye.
  • the mandrel half assigned to the positionally fixed bearing shell is expediently moved away from the other mandrel half fixed to the frame during breaking.
  • the bearing shell which is fixed without play, is movably supported, for example on a slide, the bearing shell arranged fixed to the frame enables the support with limited play desired to compensate for macro twists.
  • breaking forces are to be kept low, it can be useful to run grooves or the like on the inside of the bearing eye along the parting plane. Provide measures to reduce breaking strength. Instead of grooves, a number of holes along a line, z. B. fine laser holes can be provided, which also have the advantage that they cause local embrittlement of the material and also take the effect of typical notches in the shape of a conical hole.
  • a suitable device for carrying out the method according to the invention is designed according to claim 4.
  • a half split mandrel is provided, the circumference of which corresponds approximately to the bore of the bearing eye.
  • the two mandrel halves adjoin one another with flat surfaces, which together form a recess for the insertion of a wedge tool, the recess m of the movable mandrel half preferably being designed as a bevel which is adapted to the wedge tool, while the recess m is fixed to the frame Half of the mandrel with a constant cross-section is continuously formed.
  • the mandrel halves are blown apart by the wedge stroke, the mandrel half assigned to the rod of the connecting rod being arranged fixed to the frame, while the other is fastened on a slide arrangement, so that it performs a stroke movement of 8 to 10 mm after breaking with the slide.
  • the connecting rod cover is fixed in position by means of two stops, the stops against the shoulders of the connecting rod on both sides, i.e. H. Fit over the mouths of the connecting rod screw holes without play.
  • the abutments are mounted on spherical caps so that their flat abutment surfaces can be adapted to the respective angle of rotation of the connecting rod-side mating surfaces.
  • the play-free fixing of the position of the cover is achieved in that the stops can be adjusted hydraulically, but are locked against evasion in the separating direction after being turned on by a mechanical adjusting device.
  • This mechanical adjusting device is preferably implemented as a wedge deflection which can be actuated by means of a hydraulic support in the sense of a hydraulically actuatable piston-cylinder arrangement.
  • the position of the connecting rod cover remains unchanged throughout the breaking process; it will only be released if the connecting rod cover is removed after the sledge stroke is full.
  • the hydraulic support of the mechanical adjusting device is depressurized or retracted, after which the actuating piston controlled by the wedge deflection for the stop is moved according to the separating direction.
  • the two stops are expediently brought back into the fixed position after the bearing eye is again under tension for the next connecting rod to be machined, by the carriage arrangement ensuring that the bearing eye is subjected to a tensile bias supported by the two mandrel halves before breaking.
  • the carriage arrangement is biased by a hydraulic piston-cylinder arrangement against the frame of the device in the separating direction.
  • the half of the bearing eye connected to the rod of the connecting rod is fixed with play between the mandrel half fixed to the frame on the one hand and a pin holder which, on the other hand, engages the inside of the piston pin eye.
  • This pin holder is advantageously a so-called sword pin, which engages the piston pin eye with play m, so that it cannot deflect laterally to the longitudinal direction of the rod, but is mounted with play in the longitudinal direction of the rod.
  • Carriage arrangement movable against a compression spring arranged between this and the frame.
  • Fig. 1 is a partially sectioned side view of the
  • FIG. 2 is a plan view of the device according to
  • a connecting rod 1 of a reciprocating piston machine is inserted as the workpiece in the device for breaking separation of a machine component with a bearing eye.
  • the connecting rod 1 has a bearing eye 2 within a bearing shell 3, which can be separated into two halves in the parting plane 4 by a controlled break.
  • One half is formed by the connecting rod cover 5, the other half by the connecting rod bearing 6, with which the actual rod 7 is connected in one piece, at the end of which the piston pin eye 8 is formed within the piston pin bearing 9.
  • a recess 13 adjoins the parting plane 4 between the two mandrel halves 11, 12 for the impact of a wedge tool 14.
  • the recess 13 is delimited by a bevel 15 which is adapted to the wedge angle of the wedge tool 14;
  • the recess 13 is formed throughout with a constant right corner cross section.
  • the wedge tool 14 is arranged centrally above the mandrel 10 in such a way that a separating wedge 16 at the lower end of the wedge tool 14, which is guided in a guide block 17, is driven into the recess 13 in the direction of the arrow P1 when a striking cap 18 at the top End of the wedge tool 14, a blow is applied by a press, not shown.
  • a compression spring 20 is arranged on a guide rod 21 on both sides of a plunger 19 of the wedge tool 14. The compression springs 20 ensure that after the wedge impact and release of the wedge tool by the press, the plunger 19 returns to its upper starting position, as shown in FIG. 1.
  • the movable mandrel half 11 is fastened on a carriage 22, which in turn is mounted on a frame 23 such that it can be moved horizontally. Between the carriage 22 and a head part 24 of the frame 23, a compression spring 25 is supported, which dampens the carriage before it reaches its left end position. In this end position, the carriage 22 is due to the wedge impact which causes the connecting rod 1 to break. The stroke of the slide is only 8 to 10 mm.
  • the carriage 22 thrown in the separation direction according to arrow P2 is connected via a hydraulic piston 26 to a hydraulic cylinder 27 which is fastened on the outside of the head part 24 of the frame 23.
  • the hydraulic cylinder arrangement 26, 27 serves to pretension the carriage 22 m in the separation direction according to arrow P2, the mandrel half 11 attached to the carriage transmitting a breaking force corresponding to this preload to the connecting rod eye 2, which is fixed by the mandrel half 12 fixed to the frame.
  • the base 50 of the fixed mandrel half 12 is fixedly connected to a mounting plate 51, which in turn is fastened on the frame 23 of the device. In this way, a corresponding tensile preload in the separating direction is generated in the bearing shell 3 of the connecting rod 1 before the wedge-wrench which causes the break occurs.
  • the carriage 22 is then reset after the wedge stroke by the compression spring 25.
  • the bearing shell 3 is fixed in position in the area of the connecting rod cover 5 which is later produced, namely after fracture separation, by means of two stops 29 resting on opposite shoulders 28 of the connecting rod 1.
  • the stops 29 have flat stop surfaces 30, which are mounted with limited movement by means of spherical caps 31 m corresponding stop housings 32.
  • the stop housing 32 are screwed into a piston element 33 which is received in a cylindrical bore in a cylinder housing 34.
  • Piston element 33 and cylindrical bore 34 have a Stage 35, which is connected to a compressed air supply 36. The latter serves to return the stop 29 from its stop position in order to release the connecting rod cover 5 for removal.
  • the return of the stop 29 is only possible after the lifting of a mechanical lock by a mechanical adjusting device 37, which is designed as a wedge deflection, which can be actuated by a hydraulic support 38 m in the form of a hydraulic piston-cylinder arrangement.
  • the wedge deflection consists of a vertical piston 39 which adjoins a horizontal piston 41 via a common wedge surface 40.
  • the horizontal piston 41 ends outside the housing 42 of the adjusting device 37 that receives it with a piston end 43 which is turned to a smaller diameter. Inside the housing 42, the horizontal piston 41 is provided with a spiral spring 44, which lifts the horizontal piston 41 from the piston element 33 connected to the stop 29 and pushes the horizontal piston back.
  • the spiral spring 44 thus acts like a compression spring, which has the tendency to retract the piston end 43 m into the interior of the housing 42.
  • the adjusting device 37 has a connection housing 45 with a hydraulic connection 46 for actuating the vertical piston 39 downwards and a hydraulic connection 47 for actuating it upwards.
  • the vertical piston 39 is moved downward and accordingly moves the horizontal piston 41 to the right via the wedge surface 40, that is to say counter to the separating direction according to P2. Accordingly, the piston end 43 extends from the housing 42, strikes the piston element 33 of the Stop 29 and moves the latter against the corresponding stop surface on the shoulder 28 of the connecting rod cover 5. In this way, the stop 29 is fixed in position exactly, ie without play, so that it is not under tension.
  • the stops 29 provided on both sides of the bearing shell 3 hold the associated half of the bearing shell 3 of the connecting rod 1 against the mandrel half 11 m corresponding to the stop position connected to the slide 22 in the stop position thereof.
  • the connecting rod bearing 6 sits loosely on the mandrel half 12 fixed to the frame, so that it can be lifted off at any time. There is no obstruction by a sword pin 48, over which the piston pin eye 8 is placed, since the piston pin eye 8 of the piston pin bearing 9 contains the sword pin 48 takes up with little play, such that it is essentially fixed in a direction transverse to the axis 49 of the connecting rod 7, but in the longitudinal direction thereof is taken up with play. In this way, the connecting rod bearing 6 is secured against twisting during fracture separation, but can deviate to a limited extent in the direction of the connecting rod 7 under the fracture forces that occur, so that constraints and thus peaks in the fracture forces during the fracture separation are largely avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

L"invention concerne un procédé pour diviser par rupture une bielle (1) d"un moteur à piston alternatif en deux coquilles de coussinet formant respectivement une moitié de l"orifice de logement pour palier (2). Ce procédé comprend les étapes suivantes : avant la rupture, la pièce est enfoncée, par son orifice de logement pour palier, sur un mandrin (10) constitué de deux parties égales ; l"orifice de logement est précontraint dans le sens de rupture, par écartement des deux moitiés de mandrin (11, 12) ; la position de l"orifice de logement (2) est fixée par rapport aux moitiés de mandrin (11) associées, sur un côté du plan de division prévu (4) au moyen de butées réglables (29) ; une cale (16) est enfoncée entre les deux moitiés de mandrin (11, 12) pour séparer la coque de coussinet, dont la position est fixée, et la moitié de mandrin associée (11) de la coquille de coussinet fixée sur l"autre moitié de mandrin (12), par rupture sensiblement simultanée des deux côtés.
EP01921303A 2000-03-21 2001-03-02 Procede et dispositif pour diviser par rupture une piece de machine comportant un orifice de logement pour palier Withdrawn EP1265722A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10013980 2000-03-21
DE10013980A DE10013980A1 (de) 2000-03-21 2000-03-21 Verfahren und Vorrichtung zum Bruchtrennen eines Maschinenbauteils mit Lagerauge
PCT/EP2001/002370 WO2001070440A1 (fr) 2000-03-21 2001-03-02 Procede et dispositif pour diviser par rupture une piece de machine comportant un orifice de logement pour palier

Publications (1)

Publication Number Publication Date
EP1265722A1 true EP1265722A1 (fr) 2002-12-18

Family

ID=7635772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01921303A Withdrawn EP1265722A1 (fr) 2000-03-21 2001-03-02 Procede et dispositif pour diviser par rupture une piece de machine comportant un orifice de logement pour palier

Country Status (4)

Country Link
US (2) US20020104864A1 (fr)
EP (1) EP1265722A1 (fr)
DE (1) DE10013980A1 (fr)
WO (1) WO2001070440A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10320372A1 (de) * 2003-05-07 2004-12-16 Alfing Kessler Sondermaschinen Gmbh Verfahren und Vorrichtung zum Bruchtrennen von Lagerdeckeln
DE102007029663B3 (de) * 2007-06-27 2008-11-20 Alfing Kessler Sondermaschinen Gmbh Bruchtrennmodul für eine Werkzeugmaschine, Werkzeugmaschine mit einem Bruchtrennmodul und Verfahren zum Bruchtrennen
DE102012015385B3 (de) * 2012-08-02 2013-08-08 Alfing Kessler Sondermaschinen Gmbh Bruchtrennvorrichtung und Bruchtrennverfahren zum Bruchtrennen von Werkstücken
CN103018108B (zh) * 2012-12-14 2015-01-14 山东科技大学 底板承载性能测试装置
DE102013008115B4 (de) * 2013-05-11 2023-12-07 Neumayer Tekfor Engineering Gmbh Verfahren zur Bruchtrennung eines Pleuels und entsprechende Vorrichtung
CN104624854A (zh) * 2014-12-29 2015-05-20 中国兵器科学研究院宁波分院 用于高强韧钢连杆盖与连杆体脆化胀断夹紧装置

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Publication number Priority date Publication date Assignee Title
US1630759A (en) * 1926-04-23 1927-05-31 Jr Winslow S Pierce Breaking device for hollow cylinders
ATE98343T1 (de) * 1989-05-10 1993-12-15 Kessler Kg Maschf Verfahren und vorrichtung zum bruchtrennen von pleueln.
DE4037429A1 (de) * 1990-11-14 1992-05-21 Ex Cell O Gmbh Bearbeitungsverfahren- und anlage fuer ein lagerauge aufweisende maschinenteile
ES2147849T3 (es) * 1994-03-25 2000-10-01 Tri Way Machine Ltd Metodo y aparato para la ruptura de bielas y similares.
IT1268130B1 (it) * 1994-10-18 1997-02-20 Vigel Spa Procedimento e macchina per la separazione mediante rottura del cappello di testa delle bielle, particolarmente bielle per motori
DE29519126U1 (de) * 1995-09-15 1996-04-04 Mauser-Werke Oberndorf Maschinenbau GmbH, 78727 Oberndorf Einrichtung zum Bruchtrennen eines Werkstücks
DE19758583C2 (de) * 1997-08-01 2002-05-08 Kessler Kg Maschf Vorrichtung zum Bruchtrennen eines ringförmigen Bauteils
DE19733433A1 (de) * 1997-08-01 1999-02-18 Kessler Kg Maschf Vorrichtung zum Bruchtrennen von Stange und Deckel eines Pleuels
JP2000071129A (ja) * 1998-08-30 2000-03-07 Isuzu Motors Ltd コンロッド破断分割装置の加圧機構
CA2287140C (fr) * 1999-10-13 2001-02-13 Sudip Bhattacharjee Procede de rupture de barres de raccordement et de pieces semblables par fatigue generee par la resonance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0170440A1 *

Also Published As

Publication number Publication date
US20050116004A1 (en) 2005-06-02
DE10013980A1 (de) 2001-09-27
US20020104864A1 (en) 2002-08-08
WO2001070440A1 (fr) 2001-09-27

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