WO2014081288A1 - Laminage de mains de ressort - Google Patents

Laminage de mains de ressort Download PDF

Info

Publication number
WO2014081288A1
WO2014081288A1 PCT/NL2013/050828 NL2013050828W WO2014081288A1 WO 2014081288 A1 WO2014081288 A1 WO 2014081288A1 NL 2013050828 W NL2013050828 W NL 2013050828W WO 2014081288 A1 WO2014081288 A1 WO 2014081288A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring carrier
robot
carrier arm
workpiece
rolling
Prior art date
Application number
PCT/NL2013/050828
Other languages
English (en)
Inventor
Derk Geert Aalderink
Pieter Arie VAN WILGEN
Original Assignee
Vdl Weweler B.V.
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 Vdl Weweler B.V. filed Critical Vdl Weweler B.V.
Priority to ES13802457.5T priority Critical patent/ES2613940T3/es
Priority to EP13802457.5A priority patent/EP2922649B1/fr
Publication of WO2014081288A1 publication Critical patent/WO2014081288A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/007—Taper rolling, e.g. leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2205/00—Particular shaped rolled products
    • B21B2205/02—Tailored blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/20—Revolving, turning-over, or like manipulation of work, e.g. revolving in trio stands
    • B21B39/24—Revolving, turning-over, or like manipulation of work, e.g. revolving in trio stands by tongs or grippers

Definitions

  • the present invention relates to a method for manufacturing spring carrier arms for wheel axle suspensions of a vehicle, in particular trucks trailers and semi-trailers.
  • Such spring carrier arms comprise in general at least one flexible portion (spring portion), which has a free end that in use is attached to a vehicle chassis and an axle mounting portion adjoining the flexible portion, against which in use a wheel axle is mounted.
  • the flexible portion is a leading portion of the arm which has a free end which is pivotably attached to the vehicle chassis. Often said free end of the leading portion is formed as an attachment eye.
  • the spring carrier arm may also comprise a trailing portion which adjoins the axle mounting portion, which in use is attached to an air spring or bellows supported by the chassis. Spring carrier arms of this type are in the specific field also referred to as “flexible arms” or “flexible trailing arms”.
  • leaf springs Another type of spring carrier arms are so called “parabolic springs” or leaf springs. These leaf springs may be attached to the chassis by means of a sliding part.
  • spring carrier arms are by means of a rolling process in a rolling machine.
  • a rectangular steel blank having an overall size which is an approximation to the finished spring carrier arm is passed between two rotating rolls.
  • each portion of the blank is passed between two rotating rolls of a rolling device, wherein a roll profile is followed, in order to form a desired thickness profile of the different portions of the spring carrier arm.
  • the leading portion, the axle mounting portion and, possibly, the trailing portion of the arm are formed according to a roll profile.
  • the manufacturing process is automated by the use of handling devices, in particular manipulators and industrial robots, for handling the workpieces.
  • These handling devices take the unmachined workpiece, and position the workpiece between the rolls of the rolling device.
  • the handling devices hold on to the workpiece while it is rolled. After the workpiece is rolled, the handling devices deposit it in a finished parts storage location.
  • the process reliability of the shaping process is principally a function of the precision with which the unmachined workpiece to be machined is inserted into the rolling machine, specifically, into the working region thereof.
  • an industrial robot articulated robot
  • the carriage is linearly guided on the stationary base.
  • the gripping means grips the workpiece and introduces it between the rolls of the rolling device. It holds on to the workpiece during rolling. After rolling the gripping means releases the workpiece and an industrial robot takes the workpiece from the carriage and deposits it on another location.
  • a base is mounted to the robot head of an industrial robot (articulated robot) and a carriage with a gripper is linearly guided on said base.
  • the robot holds the base of the slider manipulator in a fixed position, while the linearly guided carriage and the gripper of the manipulator move with the workpiece.
  • the present invention has for an object to provide an alternative method for
  • a method for manufacturing a spring carrier arm for a wheel axle suspension of a vehicle wherein the spring carrier arm comprises at least one flexible portion, which in use is attached to a vehicle chassis, and an axle mounting portion adjoining the at least one flexible portion, against which in use a wheel axle is mounted.
  • the method comprises the steps of:
  • the work piece is picked up by a robot, in particular an articulated robot, with a head and a gripper directly mounted at the head, which robot gripper holds the workpiece while it is passed between the rolls of the rolling device, wherein it allows a free movement of the workpiece in a longitudinal direction of the spring carrier arm to be formed.
  • the workpiece that is to be rolled is held during rolling by the gripper of the robot, which gripper is directly at the head of the robot.
  • the robot is "free floating" in one direction, i.e. the longitudinal direction of the spring carrier arm and has normal behaviour in other directions. In this way it can be prevented that the spring carrier arm sags or curves.
  • the position of the robot gripper that holds the spring carrier arm to be formed is captured and is used to control the roll gap between the rolls of the rolling device while the profile of the different portions of the arm is rolled.
  • the robot is used as a measurement tool which "measures” the displacement and the velocity of the workpiece.
  • These "measured” parameter values are compared by a control system for the roll gap control to theoretical parameter values corresponding to the rolling profile for the spring carrier arm.
  • the gap between the rolls of the rolling device can be adjusted based on deviations between the theoretical values (reference values) and the measured values of these parameters. Also the rotational velocity of the rolls can be adjusted in this manner.
  • the location on the workpiece where the robot holds the workpiece in the first rolling run is used as a reference point for the rolling profile of the entire spring carrier arm.
  • the robot can release the workpiece in a defined position and pick it up again at another location on the workpiece, while the initial reference point remains.
  • different portions of the spring carrier arm can be rolled while the gripper holds the arm at different locations.
  • the robot gripper holds the blank at a position in the mounting portion to be when the other portions of the spring carrier arm, e.g. the leading portion and/or trailing portion is rolled.
  • the invention also relates to a manufacturing arrangement for manufacturing of a spring carrier arm for a wheel axle suspension of a vehicle, wherein the spring carrier arm comprises at least one flexible portion, which in use is attached to a vehicle chassis, and an axle mounting portion adjoining the at least one flexible portion, against which in use a wheel axle is mounted.
  • the arrangement comprises a rolling device for rolling different portions of the spring carrier arm, which rolling device comprises rotating rolls between which in use the workpiece is passed to apply a rolling profile on said spring carrier arm portions.
  • the arrangement furthermore comprises a robot having a head and a gripper mounted directly to said head, which robot gripper in use holds the spring carrier arm to be formed while it is passed between the rolls of the rolling device.
  • the robot is programmed such that it allows a free movement of the spring carrier arm to be formed in a longitudinal direction of the arm.
  • the robot used in the manufacturing arrangement is an articulated robot.
  • Fig. 1 illustrates rolling of a spring carrier arm with use of an articulated robot
  • Fig. 2 illustrates a robot gripper holding an end of the spring carrier arm
  • Fig. 3 shows how a robot holds a spring carrier arm which is 3D formed
  • Fig. 4 shows schematically the control of the rolls.
  • Fig. 1 a spring carrier arm 1 which is held by a robot 2.
  • the robot 2 is an articulated robot also referred to as an "industrial robot", which typically has rotary joints, which interact with each other.
  • the robot 2 has a head 3 on which a gripper 4 is mounted.
  • the gripper 4 holds the spring carrier arm 1 while a portion of the arm 1 is passed between rolls 5 of a rolling machine.
  • the rolls 5 are rotating rolls and have between them a gap indicated by reference numeral 6, a so called roll gap, which determines the thickness of the portion of the arm 1 that is rolled.
  • the roll gap 6 is variable and is varied over the length of the arm 1 , whereby the arm 1 is given a thickness profile.
  • a leading portion 1 a which has a defined thickness profile.
  • the leading portion 1 a has a free end on which an attachment eye may be formed such that in use it can be pivotably attached to a vehicle chassis. Adjoining the leading portion 1 a an axle mounting portion 1 b is formed, against which in use a wheel axle is mounted.
  • the movement of the workpiece 1 is determined by the rolling movement of the rolls 5.
  • the robot 2 allows a free movement of the workpiece 1 in the longitudinal direction indicated by double arrow 7.
  • the position of the gripper 4 in the longitudinal direction 7 of the arm 1 is captured during rolling. This position of the gripper is a reference for the rolling profile that the rolling machine is applying on the workpiece.
  • the robot 2 is thus used as a
  • a spring carrier arm 1 with three different sections 1 a - 1 c with each a different profile.
  • the arm shown in Fig. 2 comprises a leading portion 1 a, which has a defined thickness profile.
  • the trailing portion 1 c against which an air spring can be mounted and an axle mounting portion 1 b that is located between the trailing portion 1 c and the leading portion 1 a.
  • the leading portion 1 a has a free end on which an attachment eye may be formed such that it in use can be pivotably attached to a vehicle chassis.
  • the robot gripper 4 holds the arm 1 at the end of the trailing portion.
  • the robot 2 will generally hold he workpiece in the first rolling run at the location where the axle mounting portion 1 b of the arm is to be formed. This location is used as a reference point for the rolling profile of the entire spring carrier arm 1. After for example the leading part 1 a and the trailing portion 1 c have been rolled, the robot 2 can release the workpiece 1 in a defined position and pick it up again at another location on the workpiece, in the case of Fig. 2 at the end of trailing portion 1 c, in order to roll the portion 1 b. The initial reference point (at the part 1 b) remains. In this way different portions of the spring carrier arm 1 can be rolled while the gripper 4 holds the arm 1 at different locations.
  • Fig. 4 is shown schematically the control system of the rolls 5.
  • the product 1 is rolled according to a predefined profile with two rolls 5.
  • the roll gap 6 closes to its starting position.
  • the rolls 5 are driven with a predefined speed profile [a] (e.g. trapezoid). Together with the planned elongation, the resulting robot gripper position and speed are calculated [b].
  • This data is used for the planned robot gripper motion [c].
  • Differences between the planned and actual elongation of the arm portions 1 a - 1 c result in a difference between planned and actual robot gripper position.
  • the actual linear speed and position [d] of the robot gripper 4 are used for the product profile generator [e]. This results in a theoretical roll gap, which is controlled by the roll gap control [f].
  • a spring carrier arm may be formed which has a thickness profile and a width profile. It can be seen that the arm is first passed between a first set of rolls 5. Then the robot gripper turns the workpiece 1 over 90° and moves it to another rolling machine and passes it through a second pair of rolls 8, which is visible in Fig. 3. It is also possible that the workpiece is passed through the same pair of rolls, but that the rolls have different portions A and B as is indicated as well in Fig. 3, one to form the thickness profile of the arm portions 1 a-1 c and one to form the width profile of the arm portions 1 a - 1 c.
  • two pairs of rolls are placed behind each other, wherein the rolls of one pair are oriented with their central axes under an angle of 90° with respect to the central axes of the rolls of the other pair.
  • One pair is used for rolling the thickness profile and the other pair for rolling the width profile of the arm 1.
  • the robot does not have to move the workpiece from one rolling device to the other.
  • the pairs of rolls are not located behind each other. In that case the robot moves the workpiece from one rolling machine to another rolling machine (cf. Fig. 3), but does not have to turn the workpiece as is described above in relation to Fig. 3.

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  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Abstract

L'invention concerne un procédé de fabrication par laminage d'une main de ressort pour la suspension d'essieux d'un véhicule. Selon ce procédé, la pièce à travailler est soulevée par un robot (2), notamment un robot articulé pourvu d'une tête (3) et d'un organe de préhension (4) monté directement sur la tête (3). L'organe de préhension (4) du robot maintient la pièce à travailler (1) pendant qu'elle passe entre les rouleaux (5) du dispositif de laminage. Le robot (2) permet le libre mouvement de la pièce à travailler (1) dans le sens longitudinal de la main de ressort à former.
PCT/NL2013/050828 2012-11-23 2013-11-18 Laminage de mains de ressort WO2014081288A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES13802457.5T ES2613940T3 (es) 2012-11-23 2013-11-18 Laminado de brazos portadores de muelle
EP13802457.5A EP2922649B1 (fr) 2012-11-23 2013-11-18 Laminage de mains de ressort

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2009873 2012-11-23
NL2009873 2012-11-23

Publications (1)

Publication Number Publication Date
WO2014081288A1 true WO2014081288A1 (fr) 2014-05-30

Family

ID=49726845

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2013/050828 WO2014081288A1 (fr) 2012-11-23 2013-11-18 Laminage de mains de ressort

Country Status (3)

Country Link
EP (1) EP2922649B1 (fr)
ES (1) ES2613940T3 (fr)
WO (1) WO2014081288A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3406366A1 (fr) * 2017-05-22 2018-11-28 Frauenthal Automotive Sales GmbH Procédé de fabrication d'une lame de ressort, lame de ressort pour un ressort à lame, ressort à lame pour une suspension de roue d'un véhicule automobile.
US11498116B2 (en) * 2017-03-22 2022-11-15 Sms Group Gmbh Stretch rolling method and stretch rolling unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58209404A (ja) * 1982-05-31 1983-12-06 Mitsubishi Steel Mfg Co Ltd テ−パ圧延加工装置
US4725826A (en) * 1987-01-16 1988-02-16 Hunter Bryan D Manipulator grip slip sensor
GB2213753A (en) * 1988-01-14 1989-08-23 Alexander Ian Wilson Taper rolling apparatus
WO1990015678A1 (fr) * 1989-06-19 1990-12-27 Davy Mckee (Sheffield) Limited Laminage d'une piece conique - mesure directe de sa longueur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58209404A (ja) * 1982-05-31 1983-12-06 Mitsubishi Steel Mfg Co Ltd テ−パ圧延加工装置
US4725826A (en) * 1987-01-16 1988-02-16 Hunter Bryan D Manipulator grip slip sensor
GB2213753A (en) * 1988-01-14 1989-08-23 Alexander Ian Wilson Taper rolling apparatus
WO1990015678A1 (fr) * 1989-06-19 1990-12-27 Davy Mckee (Sheffield) Limited Laminage d'une piece conique - mesure directe de sa longueur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11498116B2 (en) * 2017-03-22 2022-11-15 Sms Group Gmbh Stretch rolling method and stretch rolling unit
EP3406366A1 (fr) * 2017-05-22 2018-11-28 Frauenthal Automotive Sales GmbH Procédé de fabrication d'une lame de ressort, lame de ressort pour un ressort à lame, ressort à lame pour une suspension de roue d'un véhicule automobile.

Also Published As

Publication number Publication date
ES2613940T3 (es) 2017-05-29
EP2922649B1 (fr) 2017-01-11
EP2922649A1 (fr) 2015-09-30

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