WO2000043139A1 - Device for adjusting the position of the forging rolls in a forming line - Google Patents

Device for adjusting the position of the forging rolls in a forming line Download PDF

Info

Publication number
WO2000043139A1
WO2000043139A1 PCT/EP2000/000362 EP0000362W WO0043139A1 WO 2000043139 A1 WO2000043139 A1 WO 2000043139A1 EP 0000362 W EP0000362 W EP 0000362W WO 0043139 A1 WO0043139 A1 WO 0043139A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolls
support
adjusting
forming line
forging
Prior art date
Application number
PCT/EP2000/000362
Other languages
French (fr)
Inventor
Andrea Toffanin
Original Assignee
Andrea Toffanin
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 Andrea Toffanin filed Critical Andrea Toffanin
Priority to AU22927/00A priority Critical patent/AU2292700A/en
Priority to EP00901583A priority patent/EP1161314A1/en
Publication of WO2000043139A1 publication Critical patent/WO2000043139A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
    • B21B13/10—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
    • B21B13/103—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane for rolling bars, rods or wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/08—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force

Definitions

  • This invention relates to a device for adjusting the position of the forging rolls in a forming line.
  • a known production method comprises the use of a head provided with rolls which act on the section being worked in order to deform, construct, guide or clamp it, depending on the operation to be carried out.
  • the rolls are currently adjusted using screw and nut systems operated by wrenches which can be very large in the case of tubes of large diameter and/or thickness.
  • An object of the invention is to eliminate these drawbacks by providing a device which enables the roll position to be easily adjusted using little force. This and further objects which will be apparent from the ensuing description are attained according to the invention by a device for adjusting the position of the forging rolls in a forming line as claimed in claim 1.
  • Figure 1 is a front view of a welding head on which the adjustment device of the invention is mounted
  • Figure 2 is a side view thereof
  • Figure 3 is an enlarged lateral section therethrough on the line Ill-Ill of Figure
  • Figure 4 shows the roll support bracket in its assembled state
  • Figure 5 shows it in plan view.
  • the adjustment device can also be applied to the rolls provided for operations downstream of said welding head, for example those in “straightening heads”.
  • the adjustment device of the invention comprises, for a forming roll 6, substantially a support 4 provided with a pin 8 for removable engagement in a corresponding slide slidable within a slide carrier 12 mounted on the welding head frame 13.
  • the slide 10 is rigid with a partition 14 housed in a cylindrical chamber, to form two chambers 16,16' provided with feed ducts 18,20 from both sides of the partition 14.
  • the two ducts 18,20 are connected to a single servovalve 22 controlled by a computer (not shown on the drawings).
  • the pin 8 is engaged in the slide 10 by insertion into a corresponding cylindrical seat 24, and is maintained stable in this condition by operating a latch 26 having a rack portion 28 engagable by a pinion 30 engaged with a rack piston 32.
  • the adjustment device of the invention operates in the following manner: Having determined the diameter of the tube to be formed and chosen the appropriate rolls 6 to form this diameter, these are mounted on the support 4 which is then engaged via the pin 8 in the seat 24, this then being closed by the latch 26 by feeding oil into the cylindrical chamber 34 of the rack piston 32.
  • oil is fed into the chamber 16 by means of a computer-controlled hydraulic system while at the same time oil is withdrawn from the chamber 16' so that the partition 14 and consequently the slide 10 rigid with it move until the roll 6 reaches the position set on the computer.
  • This position is maintained stable by the action of the servovalve 22 which intervenes each time the partition tends to move from said set position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

A device for adjusting the position of the forging rolls in a forming line comprising a forging head (2) housing at least two rolls (8) each supported by a support (4), characterised in that said support is mounted on a slide (10) provided with a partition (14) slidable within a hydraulic system in such a manner as to define two separate chambers (16, 16') connected via ducts to a servovalve (22) controlled by a computer.

Description

DEVICE FOR ADJUSTING THE POSITION OF THE FORGING ROLLS IN A FORMING LINE
This invention relates to a device for adjusting the position of the forging rolls in a forming line. In forming lines for rolled sections or electrowelded tubes, a known production method comprises the use of a head provided with rolls which act on the section being worked in order to deform, construct, guide or clamp it, depending on the operation to be carried out.
The rolls are currently adjusted using screw and nut systems operated by wrenches which can be very large in the case of tubes of large diameter and/or thickness.
These known heads have however certain drawbacks, and in particular:
- it is difficult to adjust the roll position because of the considerable forces in play,
- the time required to equip the head is lengthy precisely because of the difficulty of making this adjustment and/or replacing the rolls.
An object of the invention is to eliminate these drawbacks by providing a device which enables the roll position to be easily adjusted using little force. This and further objects which will be apparent from the ensuing description are attained according to the invention by a device for adjusting the position of the forging rolls in a forming line as claimed in claim 1.
A preferred embodiment of the invention is described in detail hereinafter with reference to the accompanying drawings, on which: Figure 1 is a front view of a welding head on which the adjustment device of the invention is mounted, Figure 2 is a side view thereof,
Figure 3 is an enlarged lateral section therethrough on the line Ill-Ill of Figure
1 , Figure 4 shows the roll support bracket in its assembled state, and Figure 5 shows it in plan view.
As can be seen from the figures the adjustment device of the invention is applied to a traditional welding head shown in front view in Figure 1.
Although the invention is described hereinafter with reference to said welding head 2, the adjustment device can also be applied to the rolls provided for operations downstream of said welding head, for example those in "straightening heads".
The adjustment device of the invention comprises, for a forming roll 6, substantially a support 4 provided with a pin 8 for removable engagement in a corresponding slide slidable within a slide carrier 12 mounted on the welding head frame 13. The slide 10 is rigid with a partition 14 housed in a cylindrical chamber, to form two chambers 16,16' provided with feed ducts 18,20 from both sides of the partition 14. The two ducts 18,20 are connected to a single servovalve 22 controlled by a computer (not shown on the drawings).
The pin 8 is engaged in the slide 10 by insertion into a corresponding cylindrical seat 24, and is maintained stable in this condition by operating a latch 26 having a rack portion 28 engagable by a pinion 30 engaged with a rack piston 32.
The adjustment device of the invention operates in the following manner: Having determined the diameter of the tube to be formed and chosen the appropriate rolls 6 to form this diameter, these are mounted on the support 4 which is then engaged via the pin 8 in the seat 24, this then being closed by the latch 26 by feeding oil into the cylindrical chamber 34 of the rack piston 32.
To position the roll in the correct position for guiding the tube to be welded, oil is fed into the chamber 16 by means of a computer-controlled hydraulic system while at the same time oil is withdrawn from the chamber 16' so that the partition 14 and consequently the slide 10 rigid with it move until the roll 6 reaches the position set on the computer. This position is maintained stable by the action of the servovalve 22 which intervenes each time the partition tends to move from said set position.
As the lower end of the support 4 is substantially in contact with the piston of a cylindrical chamber 36 at predetermined pressure, it is apparent that the rotating action due to the passage of the tube between the rolls results in a slight rotation of the support 4, which compresses said piston to cause the pressure within the chamber to vary. A suitable electrical pressure transducer therefore enables the forces in play to be measured.
From the aforegoing it is apparent that the adjustment device of the invention presents numerous advantages, and in particular:
- it enables the roll position to be adjusted without requiring the use of unwieldy and heavy wrenches, and hence with an ease and rapidity which enables this to be done even during welding, with no risk to the operator (accident prevention),
- it enables welding to be carried out with total precision because of the ability to effect micrometric displacements of the rolls and to memorize these displacements in the computer, and use the data for future applications, - it enables the welding pressure variation to be known at every moment because of the provision of pressure gauges,
- it can be controlled by a computer program, hence enabling data to be memorized for repetition in subsequent operations, - it enables the roll supports to be automatically locked.

Claims

C L A I M S
1. A device for adjusting the position of the forging rolls in a forming line comprising a forging head (2) housing at least two rolls (8) each supported by a support (4), characterised in that said support is mounted on a slide (10) provided with a partition (14) slidable within a hydraulic system in such a manner as to define two separate chambers (16, 16') connected via ducts to a servovalve (22) controlled by a computer.
2. A device as claimed in claim 1 , characterised in that said support (4) is provided with a pin (8) removably enegagable in said slide and lockable thereto by the action of a latch (26).
3. A device as claimed in claim 2, characterised in that the movement of the latch (26) is achieved by operating a pinion (30) cooperating with a rack (26) rigid with the latch structure.
4. A device as claimed in claim 3, characterised in that said pinion (30) is operated by a rack piston (32).
5. A device as claimed in claim 1 , characterised in that the end of the support (4) interacts with a pressurized chamber (36) provided with a transducer which indicates the forces in play.
PCT/EP2000/000362 1999-01-19 2000-01-18 Device for adjusting the position of the forging rolls in a forming line WO2000043139A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU22927/00A AU2292700A (en) 1999-01-19 2000-01-18 Device for adjusting the position of the forging rolls in a forming line
EP00901583A EP1161314A1 (en) 1999-01-19 2000-01-18 Device for adjusting the position of the forging rolls in a forming line

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVE990003 IT1311775B1 (en) 1999-01-19 1999-01-19 DEVICE FOR ADJUSTING THE POSITION OF THE FORGING ROLLERS IN A PROFILING UNALINEA.
ITVE99A000003 1999-01-19

Publications (1)

Publication Number Publication Date
WO2000043139A1 true WO2000043139A1 (en) 2000-07-27

Family

ID=11424409

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/000362 WO2000043139A1 (en) 1999-01-19 2000-01-18 Device for adjusting the position of the forging rolls in a forming line

Country Status (4)

Country Link
EP (1) EP1161314A1 (en)
AU (1) AU2292700A (en)
IT (1) IT1311775B1 (en)
WO (1) WO2000043139A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905536A (en) * 1972-03-13 1975-09-16 Berliner Maschinenbau Ag Apparatus for use in the production of spiral-welded tubes or pipes
FR2460745A1 (en) * 1979-07-06 1981-01-30 Egimot Forging machine for mfg. tube with longitudinal seam weld - where forging rolls exert uniform pressure when squeezing the tube to make the weld
US4312207A (en) * 1978-12-06 1982-01-26 Zaklad Doswiadczalny Przy Zakladach Urzadzen Chemiczynch "Metalchem" Rolling mill for forming cross ribbed pipes
JPS6018229A (en) * 1984-06-21 1985-01-30 Ishikawajima Harima Heavy Ind Co Ltd Roll forming device
US5862694A (en) * 1997-08-19 1999-01-26 Union Metal Corporation Tapered tube manufacturing apparatus and process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905536A (en) * 1972-03-13 1975-09-16 Berliner Maschinenbau Ag Apparatus for use in the production of spiral-welded tubes or pipes
US4312207A (en) * 1978-12-06 1982-01-26 Zaklad Doswiadczalny Przy Zakladach Urzadzen Chemiczynch "Metalchem" Rolling mill for forming cross ribbed pipes
FR2460745A1 (en) * 1979-07-06 1981-01-30 Egimot Forging machine for mfg. tube with longitudinal seam weld - where forging rolls exert uniform pressure when squeezing the tube to make the weld
JPS6018229A (en) * 1984-06-21 1985-01-30 Ishikawajima Harima Heavy Ind Co Ltd Roll forming device
US5862694A (en) * 1997-08-19 1999-01-26 Union Metal Corporation Tapered tube manufacturing apparatus and process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 135 (M - 386) 11 June 1985 (1985-06-11) *

Also Published As

Publication number Publication date
IT1311775B1 (en) 2002-03-19
ITVE990003A1 (en) 2000-07-19
EP1161314A1 (en) 2001-12-12
AU2292700A (en) 2000-08-07

Similar Documents

Publication Publication Date Title
EP1761357B1 (en) Pressure welding machine and pressure welding method
EP0079587B1 (en) Wire-bending machine
DE2353833C3 (en) Control device for the grinding slide of a grinding machine
DE3613120C2 (en) Device on a bookbinding machine for positioning machine parts via actuators for switching to different formats of book blocks
EP0224792B1 (en) Tool-changing arrangement for a multistage metal-forming machine tool
AT401896B (en) METHOD FOR BENDING A WORKPIECE FROM SHEET AND SHEET BENDING MACHINE
US4232813A (en) Method and apparatus for making bent pipe
US5875666A (en) Spring manufacturing apparatus and position adjustment apparatus for tools
EP1152842B1 (en) Roll forming using turret punch press
CH617876A5 (en)
AU764476B2 (en) Adjustable monitoring guide
EP1341269B1 (en) Crimping press for making crimp connections
US4103530A (en) Self-centering punch for billet centering machine or the like
EP2817110B1 (en) Straightening method with positioning system for the product to be straightened
EP1161314A1 (en) Device for adjusting the position of the forging rolls in a forming line
JP3022036B2 (en) Rail manufacturing method and manufacturing apparatus
KR101846158B1 (en) Blank guide device in flexible roll forming system
US3417592A (en) Taper-rolling of metals
EP4225514B1 (en) Method for monitoring and for changing the position of at least one moving crosshead of a metal press, and metal press
DE3244171C2 (en)
JP2514458B2 (en) Extrusion press equipment
US4318289A (en) Pipe cutting method and apparatus
DE10249809A1 (en) Press used as a hydraulic press comprises a press head, a press table, a slide displaceable between the press head and press table, and a tipping compensation device
EP1345715A1 (en) Forging press comprising an adjusting device on the matrix side thereof
EP0963800B1 (en) Bending apparatus for bending small or smaller tool independent bending radius

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2000901583

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 09868933

Country of ref document: US

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWP Wipo information: published in national office

Ref document number: 2000901583

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 2000901583

Country of ref document: EP

DPE2 Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101)