WO2019058004A1 - Équipement et procédé pour tordre des vilebrequins - Google Patents

Équipement et procédé pour tordre des vilebrequins Download PDF

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Publication number
WO2019058004A1
WO2019058004A1 PCT/ES2017/070631 ES2017070631W WO2019058004A1 WO 2019058004 A1 WO2019058004 A1 WO 2019058004A1 ES 2017070631 W ES2017070631 W ES 2017070631W WO 2019058004 A1 WO2019058004 A1 WO 2019058004A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotation
twist
axis
tools
module
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.)
Ceased
Application number
PCT/ES2017/070631
Other languages
English (en)
Spanish (es)
Inventor
Francisco LARRUCEA DE LA RICA
Virginia MANSO RODRIGUEZ
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.)
CIE Automotive SA
Original Assignee
CIE Automotive 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 CIE Automotive SA filed Critical CIE Automotive SA
Priority to EP17801069.0A priority Critical patent/EP3689486B1/fr
Priority to PCT/ES2017/070631 priority patent/WO2019058004A1/fr
Priority to ES17801069T priority patent/ES2893856T3/es
Publication of WO2019058004A1 publication Critical patent/WO2019058004A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/14—Twisting
    • B21D11/16—Crankshafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means

Definitions

  • the present invention has application in the mechanical industry, and more specifically in the field of equipment for the manufacture of crankshafts.
  • crankshafts determined by the characteristics of the engine that said crankshaft is part of.
  • the main characteristic of the crankshaft is the number of crankshafts, which corresponds to the number of cylinders that the engine has.
  • the crankpins can be arranged according to different angles depending on their number, in correspondence with the number of cylinders of the engine and their arrangement, either in line, for motors of 3 to 6 cylinders, or in V, for motors of 6. and 8 cylinders.
  • crankshaft rolling machines used today are mainly formed by a hydraulic press with a main cylinder, its corresponding frame, an upper base plate and a lower base plate.
  • the main cylinder of the press acts directly on the upper base plate, to which an upper tool holder is fixed, also known as the upper rear window, which remains fixed.
  • the equipment usually includes two twist trees, located on each side of the lower base plate. Said twisting shafts transmit the rotation to a lower tool holder, and are actuated by two or four twist cylinders.
  • the twisting tool currently used comprises a split tool consisting of upper and lower lunettes, some fixed and others mobile, that is, they can rotate with respect to the longitudinal axis of the crankshaft , where the mobile lunettes rest on rollers. All lunettes are mounted on a lower base plate and a top base plate. The distances between the lunettes are adjustable, so that the distances and the number of lunettes are fixed to the base plates according to the type of crankshaft to be rotated.
  • the forged crankshaft is placed on the inside of the split tooling.
  • the crankshaft is positioned by means of the lower lunettes once the upper head has descended completely and the crankshaft is tied, the twisting process is carried out by turning the lunettes mobiles, which materialize as split discs that rotate at an angle preset by the front twist shaft and the rear twist shaft that incorporates the equipment.
  • the twisted shafts are on both sides of a central axis of the machine and rest on the frame of the press itself. These trees are the ones that transmit the torque to the twist lunettes.
  • the crankpin moored by the movable lunettes therefore, describe an arc of circumference until it reaches the required angular position.
  • the twist angle is adjusted by adjusting the stroke of the twist cylinder.
  • crankshafts with 3, 4 or 6 cranks with angles of 120 °, 90 ° or 60 ° respectively you can make the twist with only two twist trees, so that all the crankpins can be positioned with a certain value of twist angle, that is, different from 0 °.
  • crankshafts with 5 crankshafts and an angle of 72 ° 2 additional winding shafts are required, since only two crankshafts can be positioned with the same angle of twist. Obviously, this complicates the team and the process even more.
  • the upper head moves back to the top dead center, the lower and upper ejectors being activated simultaneously.
  • the already twisted crankshaft is suspended over the lower ejectors.
  • the lower movable lunettes return to their initial position as a consequence of the lowering of the twist shafts.
  • the mobile half-roofs of the upper head are retracted to their initial position through pneumatic cylinders. From this moment the crankshaft can be removed.
  • a first aspect of the present invention relates to a device for turning crankshafts, which allows to reduce the deformations of the twisted crankshaft and simplify the design of the corresponding tooling.
  • the equipment proposed by the invention comprises a tooling comprising at least three twist modules, wherein each twist module in turn comprises an upper tool and a lower tool.
  • the supplies they have an internal face that they can face.
  • Each tool has a cavity in said internal face whose geometry corresponds to a part of the specific external shape of a crankpin to be rotated, so that the cavity defined by the tools facing the same twist module corresponds to the shape complete exterior of the crankpin. That is to say, the shape of the trace of the tooling coincides 100% with that of the crankshaft section.
  • the crankshaft has a longitudinal axis and can be arranged so that a crankpin is housed in the cavity defined by the lower tool of one of the twist modules, preferably one that will not rotate, as explained later.
  • the tools of each twist module are arranged on a support element, where at least two support elements, also called rotation frames, can rotate independently, with respect to speed of rotation. rotation, angle and direction, with respect to an axis of rotation that coincides with the longitudinal axis of the crankshaft when said crankshaft is disposed in the equipment.
  • the tools of the same twist module can only perform a linear displacement with respect to the support element in which they are arranged, said linear displacement being perpendicular to the axis of rotation.
  • the invention proposes a modular solution in which all the turns at the same time, that is to say simultaneously, which reduces tensions and gaps, avoiding excessive deformations. What allows to dispense with a subsequent calibration.
  • the load of the crankshaft in the twisting modules can be selected between lateral, from a plane perpendicular to the axis of rotation, and frontal, from a plane parallel to the axis of rotation.
  • a second aspect of the invention relates to a method for revving crankshafts, comprising using equipment as described above.
  • the method comprises the following steps:
  • Figure 1 shows a schematic view of a first embodiment of the equipment proposed by the invention, which comprises three twist modules with lateral loading and second hydraulic actuating means.
  • Figure 2 shows a schematic view of a second embodiment of the equipment proposed by the invention, which comprises three winding modules with side loading and second electrical actuation means.
  • Figure 3 shows a schematic view of a third embodiment of the equipment of the invention, which comprises three modules of twist with load front and second hydraulic drive means.
  • crankshaft reaming equipment (A) proposed by the invention comprises at least three twist modules (1), in the cases represented in figures three, although it is also contemplated that it comprises five.
  • Each twist module (1) in turn comprises a upper tool (V) and a lower tool (1 "), where said tools (V, 1") have an internal face through which they can be faced, each tool having ( V, 1 ") a cavity in said internal face whose geometry corresponds to a part of the external shape of a crank pin (A) to be rotated, so that the cavity defined by the tools (1 ', 1") faced of the same twist module (1) corresponds to the complete outer shape of the crankpin.
  • crankshaft (A) has a longitudinal axis ( ⁇ ') and can be arranged so that a crankpin is housed in the cavity defined by the tools (1', 1 ") opposite each other. minus one twist module (1).
  • each twist module (1) are arranged on a support element (2) that can rotate independently of an axis of rotation (3) that it coincides with the longitudinal axis ( ⁇ ') of the crankshaft (A) when said crankshaft (A) is arranged in the equipment.
  • the supporting element (2) corresponding to the central twisting module (1) does not rotate or move in the direction of the axis of rotation (3), although the invention also contemplates an embodiment in the one that can do it.
  • the tools (1 ', 1 ") of the same twist module (1) can only perform a linear displacement with respect to the support element (2) in which they are arranged, said linear displacement being perpendicular to the axis of rotation (3)
  • the longitudinal displacement of the tools (V, 1 ") of each twist module (1) is carried out by means of first actuating means (4) mounted on the support element (2) itself.
  • each support element (2) with respect to the axis of rotation (3) is carried out by means of second actuation means.
  • the second drive means (5) are hydraulic, while in the embodiment shown in FIG. 2 the second (5) drive means are electrical.
  • Figures 1 and 2 show two embodiments in which the load of the crankshaft (A) in the twist modules (1) is performed laterally, that is from a plane perpendicular to the axis of rotation (3).
  • the load is frontal, that is, from a plane parallel to the axis of rotation (3).
  • access is quick and easy.
  • the person skilled in the art will be able to understand that the embodiments of the invention that have been described can be combined in multiple ways within the object of the invention.
  • the invention has been described according to some preferred embodiments thereof, but for the person skilled in the art it will be evident that multiple variations can be introduced into said preferred embodiments without exceeding the object of the claimed invention.

Landscapes

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

Abstract

L'invention concerne un équipement et un procédé pour tordre des vilebrequins (A), ledit équipement comprenant trois modules (1), chacun comportant un outil supérieur (1') et inférieur (1'') qui ont une face interne par le biais de laquelle ils se font face, chaque outil (1', 1'') présentant une cavité dans ladite face interne dont la géométrie correspond à la forme externe d'un tampon du vilebrequin (A) à chantourner de manière que la cavité définie par les es outils (1', 1'') situés face-à-face d'un même module (1) correspond à la forme extérieure complète du tampon, lesdits outils (1', 1'') de chaque module (1) étant disposés sur un élément de support (2) qui peut tourner de manière indépendante par rapport à un axe de rotation (3) qui coïncide avec un axe longitudinal (A') du vilebrequin (A) quand ledit vilebrequin (A) est placé dans l'équipement, lesdits outils (1', 1'') de chaque module (1) pouvant effectuer uniquement un déplacement linéaire par rapport à l'élément de support (2) dans lequel ils sont placés, ledit déplacement linéaire étant perpendiculaire à l'axe de rotation (3).
PCT/ES2017/070631 2017-09-25 2017-09-25 Équipement et procédé pour tordre des vilebrequins Ceased WO2019058004A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP17801069.0A EP3689486B1 (fr) 2017-09-25 2017-09-25 Équipement et procédé pour tordre des vilebrequins
PCT/ES2017/070631 WO2019058004A1 (fr) 2017-09-25 2017-09-25 Équipement et procédé pour tordre des vilebrequins
ES17801069T ES2893856T3 (es) 2017-09-25 2017-09-25 Equipo y procedimiento para la torcedura de cigüeñales

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2017/070631 WO2019058004A1 (fr) 2017-09-25 2017-09-25 Équipement et procédé pour tordre des vilebrequins

Publications (1)

Publication Number Publication Date
WO2019058004A1 true WO2019058004A1 (fr) 2019-03-28

Family

ID=60409301

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2017/070631 Ceased WO2019058004A1 (fr) 2017-09-25 2017-09-25 Équipement et procédé pour tordre des vilebrequins

Country Status (3)

Country Link
EP (1) EP3689486B1 (fr)
ES (1) ES2893856T3 (fr)
WO (1) WO2019058004A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112792237A (zh) * 2021-01-29 2021-05-14 苏州铜盟电气有限公司 一种用于加工铜排的扭转模具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57160537A (en) * 1981-03-30 1982-10-02 Sumitomo Metal Ind Ltd Torsional press for crank shaft
GB2145018A (en) * 1983-07-15 1985-03-20 Honda Motor Co Ltd Torsional molding apparatus for crank shafts
DE19958681A1 (de) * 1998-12-16 2000-08-03 Sumitomo Heavy Industries Umformpresse für Kurbelwellen
JP2001259747A (ja) * 2000-03-22 2001-09-25 Sumitomo Heavy Ind Ltd クランク軸の成形方法及びクランク軸用成形プレス

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57160537A (en) * 1981-03-30 1982-10-02 Sumitomo Metal Ind Ltd Torsional press for crank shaft
GB2145018A (en) * 1983-07-15 1985-03-20 Honda Motor Co Ltd Torsional molding apparatus for crank shafts
DE19958681A1 (de) * 1998-12-16 2000-08-03 Sumitomo Heavy Industries Umformpresse für Kurbelwellen
JP2001259747A (ja) * 2000-03-22 2001-09-25 Sumitomo Heavy Ind Ltd クランク軸の成形方法及びクランク軸用成形プレス

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112792237A (zh) * 2021-01-29 2021-05-14 苏州铜盟电气有限公司 一种用于加工铜排的扭转模具

Also Published As

Publication number Publication date
ES2893856T3 (es) 2022-02-10
EP3689486A1 (fr) 2020-08-05
EP3689486B1 (fr) 2021-06-30

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