EP1509348B1 - Automatic rolling machine comprising an insertion device - Google Patents

Automatic rolling machine comprising an insertion device Download PDF

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Publication number
EP1509348B1
EP1509348B1 EP03755129A EP03755129A EP1509348B1 EP 1509348 B1 EP1509348 B1 EP 1509348B1 EP 03755129 A EP03755129 A EP 03755129A EP 03755129 A EP03755129 A EP 03755129A EP 1509348 B1 EP1509348 B1 EP 1509348B1
Authority
EP
European Patent Office
Prior art keywords
insertion device
automatic rolling
rolling machine
linear motor
reciprocating member
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.)
Revoked
Application number
EP03755129A
Other languages
German (de)
French (fr)
Other versions
EP1509348A1 (en
Inventor
Enrico Ghezzi
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.)
SMART Srl
Original Assignee
SMART Srl
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
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Application filed by SMART Srl filed Critical SMART Srl
Publication of EP1509348A1 publication Critical patent/EP1509348A1/en
Application granted granted Critical
Publication of EP1509348B1 publication Critical patent/EP1509348B1/en
Anticipated expiration legal-status Critical
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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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
    • B21H5/027—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls by rolling using reciprocating flat dies, e.g. racks
    • 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
    • B21H9/00—Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass
    • B21H9/02—Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass for screw-rolling machines

Definitions

  • the present invention relates to an automatic rolling machine.
  • Rolling machines can be used to produce screws and generate the thread by cold rolling.
  • the blank is placed between two plates, one of which is motionless while the other can perform a reciprocating motion, and the plates roll the blank under pressure.
  • the plates have protrusions that are inclined at the angle that corresponds to the pitch of the thread to be formed, they constitute a female thread spread flat, and by pressing the material they force it to assume the shape of the thread.
  • GB-882125 which forms the basis for the preamble of claim 1, discloses a thread rolling machine provided with a mechanism for feeding blanks into a gap formed by two rolling dies.
  • the aim of the present invention is to provide an insertion device particularly for automatic rolling machines that is more functional and efficient than insertion devices used in conventional machines.
  • An object of the invention is to provide an insertion device that ensures the best kinematic and dynamic characteristics.
  • a further object of the invention is to provide an insertion device that allows maximum containment of inertias.
  • a further object is to provide an insertion device in which the stroke of the mechanism is limited to the strictly necessary extent.
  • a further object is to provide an insertion device in which the rule of motion can be optimized easily, particularly as regards the ramps and pauses in the two directions of operation.
  • a further object is to provide an insertion device that facilitates the correct insertion of the part and is able to detect anomalies of insertion, such as for example initial slippage and the insertion of a plurality of blanks in the same rolling step.
  • Another object is to provide a device that also constitutes an efficient part counter, this being always a very critical function in these kinds of machine.
  • Another object is to provide a device that reduces the wear of the movable chaser in the insertion region, adjusting the contact pressure precisely.
  • an insertion device particularly for automatic rolling machines, comprising a reciprocating member that is provided with a means adapted to pick up a part to be machined from a guide and to insert it in a working position, characterized in that the reciprocating member is actuated by a linear motor.
  • the insertion device according to the invention can be applied to an automatic rolling machine 1, which is essentially constituted by a fixed plate 2 and a movable plate 3, which has a reciprocating motion.
  • the device can also be applied to automatic rolling machines of the roller and sector type.
  • a blank 4, arriving from a feeder guide 5, is placed by the insertion device 101 between the two plates 2 and 3, which roll it under pressure.
  • the plates have protrusions that are inclined at an angle that corresponds to the pitch of the thread, thus constituting a female thread spread flat, and by pressing the material they force it to assume the shape of the thread.
  • the insertion device 101 is constituted by a base 6, which is rigidly coupled to the frame of the machine 1 and supports a reciprocating member 8 that is actuated by a linear motor 9.
  • the reciprocating member 8 has a transverse guide 10, to which an insertion punch or pusher 11 is applied; its position on the transverse guide can be adjusted and is fixed for example by means of a screw system.
  • the linear motor is controlled electronically and the system therefore allows completely automatic adjustment.
  • the insertion device according to the present invention is driven by an electronic servosystem with a linear motor and the corresponding drive, differently from the systems of the prior art that have a conventional kinematic chain constituted by cams, belts, spherical joints, levers et cetera, provides several important advantages.
  • the device according to the present invention allows maximum containment of inertias and ensures the best kinematic and dynamic characteristics, limiting the stroke of the mechanism to the strictly necessary extent and at the same time facilitating the correct insertion of the part.
  • the device also allows to optimize the rule of motion, i.e., the ramps and pauses in the two directions of operation, and minimizes the wear of the movable chaser in the insertion region, adjusting precisely the contact pressure.
  • an insertion device for automatic rolling machines having been provided which is functionally and constructively superior to the devices used so far for the insertion of the parts to be machined.
  • the insertion device according to the invention is particularly advantageous in a machine that has a modular structure, so as to facilitate its optimum execution on machine tools of any size, at the same time ensuring an excellent level of quality.
  • Another important advantage of the device according to the present invention is that it facilitates and simplifies the operations for fine-tuning and adjusting the machine.
  • Another advantage of the device is that it allows to control initial slippage and avoid the insertion of a plurality of blanks in the same rolling step.
  • Another advantage of the device is that it also constitutes an efficient part counter.
  • the structure of the device according to the invention also contributes to strength and precision in construction, which together with an appropriate choice of materials ensure complete stability of the operating conditions.
  • the materials used, as well as the dimensions, may of course be any according to requirements and to the state of the art.

Abstract

An insertion device, particularly for automatic rolling machines, which includes a reciprocation member that is provided with a means adapted to pick up a part to be machined from a guide and insert said part in a working position, wherein the reciprocating member is actuated by a linear motor.

Description

The present invention relates to an automatic rolling machine.
Rolling machines can be used to produce screws and generate the thread by cold rolling.
In a machine of this type, the blank is placed between two plates, one of which is motionless while the other can perform a reciprocating motion, and the plates roll the blank under pressure.
Since the plates have protrusions that are inclined at the angle that corresponds to the pitch of the thread to be formed, they constitute a female thread spread flat, and by pressing the material they force it to assume the shape of the thread.
GB-882125, which forms the basis for the preamble of claim 1, discloses a thread rolling machine provided with a mechanism for feeding blanks into a gap formed by two rolling dies.
The ever-shrinking size of production batches on the part of screw manufacturers, together with the persistent difficulty in finding specialized personnel capable of working with a sufficient level of skill, have led to the need to provide machines that are functionally as simple as possible, i.e., have a very high degree of automation.
The aim of the present invention is to provide an insertion device particularly for automatic rolling machines that is more functional and efficient than insertion devices used in conventional machines.
An object of the invention is to provide an insertion device that ensures the best kinematic and dynamic characteristics.
A further object of the invention is to provide an insertion device that allows maximum containment of inertias.
A further object is to provide an insertion device in which the stroke of the mechanism is limited to the strictly necessary extent.
A further object is to provide an insertion device in which the rule of motion can be optimized easily, particularly as regards the ramps and pauses in the two directions of operation.
A further object is to provide an insertion device that facilitates the correct insertion of the part and is able to detect anomalies of insertion, such as for example initial slippage and the insertion of a plurality of blanks in the same rolling step.
Another object is to provide a device that also constitutes an efficient part counter, this being always a very critical function in these kinds of machine.
Another object is to provide a device that reduces the wear of the movable chaser in the insertion region, adjusting the contact pressure precisely.
This aim and these and other objects that will become better apparent hereinafter are achieved by an insertion device, particularly for automatic rolling machines, comprising a reciprocating member that is provided with a means adapted to pick up a part to be machined from a guide and to insert it in a working position, characterized in that the reciprocating member is actuated by a linear motor.
Further characteristics and advantages of the present invention will become better apparent from the description of preferred but not exclusive embodiments thereof, illustrated by way of non-limitative example in the accompanying drawings, wherein:
  • Figure 1 is a schematic side elevation view of the rolling machine according to the invention;
  • Figure 2 is a schematic plan view of the insertion region of the rolling machine;
  • Figure 3 is a side elevation view of the insertion device;
  • Figure 4 is a front elevation view of the insertion device;
  • Figure 5 is a plan view of the insertion device;
  • Figures 6 and 7 are enlarged-scale plan views of two steps of the operation of the insertion device.
    • With reference to the cited figures, the insertion device according to the invention, generally designated by the reference numeral 101, can be applied to an automatic rolling machine 1, which is essentially constituted by a fixed plate 2 and a movable plate 3, which has a reciprocating motion. The device can also be applied to automatic rolling machines of the roller and sector type.
    A blank 4, arriving from a feeder guide 5, is placed by the insertion device 101 between the two plates 2 and 3, which roll it under pressure.
    The plates have protrusions that are inclined at an angle that corresponds to the pitch of the thread, thus constituting a female thread spread flat, and by pressing the material they force it to assume the shape of the thread.
    According to the invention, the insertion device 101 is constituted by a base 6, which is rigidly coupled to the frame of the machine 1 and supports a reciprocating member 8 that is actuated by a linear motor 9.
    The reciprocating member 8 has a transverse guide 10, to which an insertion punch or pusher 11 is applied; its position on the transverse guide can be adjusted and is fixed for example by means of a screw system.
    The linear motor is controlled electronically and the system therefore allows completely automatic adjustment.
    The fact that the insertion device according to the present invention is driven by an electronic servosystem with a linear motor and the corresponding drive, differently from the systems of the prior art that have a conventional kinematic chain constituted by cams, belts, spherical joints, levers et cetera, provides several important advantages.
    The device according to the present invention allows maximum containment of inertias and ensures the best kinematic and dynamic characteristics, limiting the stroke of the mechanism to the strictly necessary extent and at the same time facilitating the correct insertion of the part.
    The device also allows to optimize the rule of motion, i.e., the ramps and pauses in the two directions of operation, and minimizes the wear of the movable chaser in the insertion region, adjusting precisely the contact pressure.
    In practice it has been found that the invention achieves the intended aim and objects, an insertion device for automatic rolling machines having been provided which is functionally and constructively superior to the devices used so far for the insertion of the parts to be machined.
    The insertion device according to the invention is particularly advantageous in a machine that has a modular structure, so as to facilitate its optimum execution on machine tools of any size, at the same time ensuring an excellent level of quality.
    Another important advantage of the device according to the present invention is that it facilitates and simplifies the operations for fine-tuning and adjusting the machine.
    Another advantage of the device is that it allows to control initial slippage and avoid the insertion of a plurality of blanks in the same rolling step.
    Another advantage of the device is that it also constitutes an efficient part counter.
    The device according to the invention is susceptible of numerous modifications and variations, within the scope of the appended claims. All the details may be replaced with technically equivalent elements.
    The structure of the device according to the invention also contributes to strength and precision in construction, which together with an appropriate choice of materials ensure complete stability of the operating conditions.
    The materials used, as well as the dimensions, may of course be any according to requirements and to the state of the art.

    Claims (3)

    1. An automatic rolling machine comprising an insertion device (101) which comprises a reciprocating member (8) that is provided with a means adapted to pick up a part (4) to be machined from a guide (5) and to insert it in a working position, characterized in that the reciprocating member is actuated by a linear motor (9).
    2. The automatic rolling machine according to claim 1, characterized in that said linear motor (9) is driven electronically.
    3. The automatic rolling machine according to claim 1 or 2, characterized in that said reciprocating member (8) and said linear motor (9) are supported by a base (6) that is rigidly coupled to the frame of the machine (1).
    EP03755129A 2002-05-28 2003-05-26 Automatic rolling machine comprising an insertion device Revoked EP1509348B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    IT2002MI001146A ITMI20021146A1 (en) 2002-05-28 2002-05-28 INTRODUCTION DEVICE PARTICULARLY FOR AUTOMATIC ROLLING MACHINES
    ITMI20021146 2002-05-28
    PCT/EP2003/005459 WO2003099489A1 (en) 2002-05-28 2003-05-26 Insertion device particularly for automatic rolling machines

    Publications (2)

    Publication Number Publication Date
    EP1509348A1 EP1509348A1 (en) 2005-03-02
    EP1509348B1 true EP1509348B1 (en) 2005-10-12

    Family

    ID=11449986

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP03755129A Revoked EP1509348B1 (en) 2002-05-28 2003-05-26 Automatic rolling machine comprising an insertion device

    Country Status (9)

    Country Link
    US (1) US20060054631A1 (en)
    EP (1) EP1509348B1 (en)
    CN (1) CN1301163C (en)
    AT (1) ATE306339T1 (en)
    AU (1) AU2003242571A1 (en)
    DE (1) DE60301882T2 (en)
    ES (1) ES2246483T3 (en)
    IT (1) ITMI20021146A1 (en)
    WO (1) WO2003099489A1 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP2095892A1 (en) 2008-02-27 2009-09-02 E. W. Menn Gmbh & Co. Kg Profile roller machine

    Families Citing this family (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    ITMI20021573A1 (en) * 2002-07-17 2004-01-19 Smart Srl METHOD FOR THE INTRODUCTION OF BLINDS TO BE THREADED IN AUTOMATIC ROTARY ROLLING MACHINES AND MACHINE WORKING WITH SUCH METHOD
    ITMI20060800A1 (en) * 2006-04-21 2007-10-22 Smart Srl AUTOMATIC FLAT ROLLER MACHINE
    IT1400572B1 (en) * 2009-10-15 2013-06-14 Ingramatic Spa FLAT THREADED MACHINE.
    IT1399346B1 (en) * 2010-04-12 2013-04-16 Smart Srl INTRODUCTION DEVICE FOR ROLLING MACHINES.

    Family Cites Families (14)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3123251A (en) * 1964-03-03 Apparatus for feeding shank buttons to an attaching station
    GB882125A (en) * 1958-03-14 1961-11-15 Malmedie & Co Maschf Improvements in or relating to thread rolling machines
    DE1935451C2 (en) * 1969-07-12 1982-12-30 E.W. Menn KG, Maschinenfabrik, 5912 Hilchenbach Device for separating and inserting bolt-shaped blanks on a processing machine
    US4684309A (en) * 1983-08-29 1987-08-04 Vulcan Tool Company System and apparatus for use in fabricating small tubular articles
    US5121329A (en) * 1989-10-30 1992-06-09 Stratasys, Inc. Apparatus and method for creating three-dimensional objects
    DE4014671C1 (en) * 1990-05-08 1991-08-29 E.W. Menn Gmbh & Co Maschinenfabrik, 5912 Hilchenbach, De
    IT1242989B (en) * 1990-08-29 1994-05-23 Vamatex Spa PERFECTED DEVICE FOR THE FORMATION OF CIMOSSA IN FRAMES WITHOUT SHUTTLES
    US6346107B1 (en) * 1990-12-14 2002-02-12 Robert L. Cucin Power-assisted liposuction instrument with cauterizing cannual assembly
    IT1250082B (en) * 1991-07-10 1995-03-30 Siv Soc Italiana Vetro APPARATUS AND PROCEDURE FOR THE MANUFACTURE OF GLASSES WITH A COMPLEX SHAPE SUITABLE FOR USE ON VEHICLES
    JPH10305337A (en) * 1997-05-06 1998-11-17 Yamada Dobby Co Ltd Feeding device for press machine
    DE19831060A1 (en) * 1998-07-13 2000-01-20 Hilti Ag Setting tool with nail magazine
    DE19858189A1 (en) * 1998-08-24 2000-06-21 Ophardt Product Gmbh & Co Kg Mixing tank
    JP2001025834A (en) * 1999-07-15 2001-01-30 Exedy Corp Work transporting device for sending work to press device
    JP3341762B2 (en) * 2000-11-22 2002-11-05 松下電器産業株式会社 Die bonding apparatus and die bonding method

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP2095892A1 (en) 2008-02-27 2009-09-02 E. W. Menn Gmbh & Co. Kg Profile roller machine

    Also Published As

    Publication number Publication date
    ES2246483T3 (en) 2006-02-16
    AU2003242571A1 (en) 2003-12-12
    CN1655892A (en) 2005-08-17
    DE60301882T2 (en) 2006-05-24
    ATE306339T1 (en) 2005-10-15
    EP1509348A1 (en) 2005-03-02
    DE60301882D1 (en) 2005-11-17
    WO2003099489A1 (en) 2003-12-04
    CN1301163C (en) 2007-02-21
    ITMI20021146A0 (en) 2002-05-28
    US20060054631A1 (en) 2006-03-16
    ITMI20021146A1 (en) 2003-11-28

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