EP3608032A1 - Device and method for forming a thickened head on the head ends of a metal rod element - Google Patents

Device and method for forming a thickened head on the head ends of a metal rod element Download PDF

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Publication number
EP3608032A1
EP3608032A1 EP19193156.7A EP19193156A EP3608032A1 EP 3608032 A1 EP3608032 A1 EP 3608032A1 EP 19193156 A EP19193156 A EP 19193156A EP 3608032 A1 EP3608032 A1 EP 3608032A1
Authority
EP
European Patent Office
Prior art keywords
clamping
metal rod
rod element
bodies
deformation
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.)
Pending
Application number
EP19193156.7A
Other languages
German (de)
English (en)
French (fr)
Inventor
Willem Van Den Brink
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.)
Polymac BV
Original Assignee
Polymac BV
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 Polymac BV filed Critical Polymac BV
Publication of EP3608032A1 publication Critical patent/EP3608032A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/004—Bending wire other than coiling; Straightening wire by means of press-type tooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F45/00—Wire-working in the manufacture of other particular articles
    • B21F45/004—Mounting bails on containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F5/00—Upsetting wire or pressing operations affecting the wire cross-section
    • B21F5/005—Upsetting wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/003—Combinations of clamps

Definitions

  • the invention relates according to a first aspect to a device for forming a thickened head on a head end of a metal rod element, which device is provided with:
  • a bucket handle fitting machine for fitting metal handles to buckets is generally known. With this bucket handle fitting machine, handles can be made from straight metal rod elements. The straight metal rod elements are loaded into a magazine of the bucket handle fitting machine. A displacement mechanism displaces the straight metal rod elements individually to a device for forming a thickened head on the head ends of the straight metal rod element.
  • the device for forming the thickened head comprises a lowermost clamping body, an uppermost clamping body and a deformation member for the plastic deformation of a head end of the straight metal rod element for the forming of a thickened head.
  • the lowermost clamping body is fixedly fastened to the bucket handle fitting machine, whilst the uppermost clamping body is movable by a first hydraulic cylinder between an open and closed position.
  • the deformation member can be driven by a second hydraulic cylinder.
  • the straight metal rod element In the open position of the clamping bodies, the straight metal rod element is placed between the clamping bodies and the head end thereof which is to be plastically deformed is aligned against the deformation member.
  • the first hydraulic cylinder displaces the uppermost clamping body into the closed position, so that the straight metal rod element is laterally clamped between the clamping bodies, whilst that head end of the straight metal rod element which is to be plastically deformed projects over a short length relative to the clamping bodies.
  • the second hydraulic cylinder forces the deformation member against the projecting head end portion of the straight metal rod element with a force which is sufficiently large to plastically deform that head end portion ("cold upsetting"). This produces the thickened head on one end of the straight metal rod element.
  • a thickened head is formed in the same way on the opposite end of the straight metal rod element.
  • both ends having the thickened heads are bent over at right angles and the metal rod element is bent around a forming plate in order to arrive at the desired handle shape.
  • the formed metal handle is then fitted in the bucket handle fitting machine to a bucket.
  • An object of the first aspect of the invention is to provide an improved device for forming a thickened head on the head ends of a metal rod element, in particular for use in connection with a device for forming a metal handle for a bucket or a bucket handle fitting device for fitting a metal handle to a bucket.
  • a device for forming a thickened head on a head end of a metal rod element which device is provided with:
  • the drive device for driving the deformation member comprises a drive unit, a transmission element and a lever arm.
  • the transmission element pivots about the pivot axis.
  • the end of the lever arm which abuts against the cam track is radially displaced relative to the pivot axis of the transmission element.
  • the lever arm pivots about the hinge axis thereof and the end of the lever arm to which the deformation member is fastened moves towards the head end of the clamped metal rod element.
  • the metal rod element is, for example, a straight metal rod element having a constant cross section over the entire length thereof, such as a round cross section.
  • the deformation member crushes the projecting end portion having the head end by means of plastic deformation, so that the thickened head on the end of the clamped metal rod is formed.
  • the lever arm and the transmission element having the cam track increase the force delivered by the drive unit.
  • a drive unit of relatively low power is sufficient to generate the relatively large forces which are necessary for the plastic deformation of the projecting end portion having the head end.
  • the height and width of the drive device remains limited, so that the device according to the invention occupies a relatively small floor surface.
  • the drive unit can be constructed in various manners.
  • the drive unit comprises, for example, a linear drive unit, such as a pneumatic cylinder.
  • the maximum force which a pneumatic cylinder can exert is less than that of a hydraulic cylinder.
  • the use of a pneumatic cylinder is possible, however, since the required drive power with the drive device according to the invention is relatively small.
  • the drive unit is provided with a drive rod which can be reciprocated and which is hingeably connected to the transmission element.
  • the transmission element pivots about the pivot axis thereof.
  • the end of the lever arm which abuts against the cam track moves over the cam track.
  • the cam track pushes that end of the lever arm away from the pivot axis of the transmission element, so that the lever arm articulates about the hinge axis thereof and the deformation body is pressed against the head end of the metal rod element.
  • the reverse movement is performed.
  • the cam track of the transmission element comprises a curved track.
  • the curved track forms a curve path, i.e. the curved track is non-circular.
  • the curved track has a varying distance to the pivot axis, i.e. the distance from the pivot axis to that end of the lever arm which follows the curved track changes during the pivot movement of the transmission element.
  • the curvature is such that that end of the lever arm performs a continuous movement.
  • the curved track is provided with a path having a start point, and wherein each point of the path is determined by the distance between that point of the path and the pivot axis and the angle between the connecting line from that point to the pivot axis and the connecting line from the start point to the pivot axis, and wherein said distance is directly proportional to said angle.
  • each degree of angular displacement of the transmission member gives an equal displacement of the end of the lever arm which abuts against the path relative to the pivot axis.
  • each mm of travel of the drive rod leads to a proportional displacement of the end of the lever arm which abuts against the path.
  • the angular displacement of the lever arm is also proportional, so that the deformation body on the opposite end of the lever arm exerts a substantially constant force during the cold upsetting.
  • the device is provided with a stop element for the head end of the metal rod element to be clamped, wherein the stop element is adjustable in a direction parallel to the rod element to be clamped.
  • the stop element determines the length of the end portion having the head end, which, following the clamping, projects relative to the clamping device, i.e. the quantity of material which the deformation body is to deformplastically. If too large or too small a quantity of material is upset, the thickened head acquires an unwanted shape.
  • the stop element is displaceable and fastenable to a guide running substantially parallel to the rod element to be clamped. The position of the stop element can be easily adjusted if a metal rod element of a different length is used.
  • the clamping device is provided with a fixed clamping body and a movable clamping body, wherein the movable clamping body is movable between a first position, in which the metal rod element can be brought between the clamping bodies, and a second position, in which the metal rod element can be laterally clamped between the clamping bodies whilst leaving the end portion having the head end free.
  • the device comprises a second drive device, which is configured to drive the movable clamping body, wherein the second drive device is provided with:
  • the second drive device for driving the movable clamping body is configured in the same way as the drive device for driving the deformation body.
  • the above-stated description of the components, operation and advantages of the drive device for driving the deformation body is therefore also applicable to the second drive device for driving the movable clamping body.
  • the drive unit of the second drive device and the cam track of the second transmission element can be configured according to one or more of the features according to one of more of claims 2-5.
  • the invention relates to, in combination, at least a first clamping body and a second clamping body, wherein each clamping body is provided with a clamping surface in which a longitudinal groove is made, and wherein the clamping surfaces of the clamping bodies can be placed one against the other such that the longitudinal grooves form a receiving cavity for receiving a portion of a metal rod element.
  • a combination is a "kit of parts”.
  • a bucket handle fitting machine for fitting metal handles to buckets is generally known.
  • a portion of the straight metal rod element is placed between the longitudinal grooves of the clamping bodies and the head end is aligned against the deformation member.
  • the first hydraulic cylinder displaces the uppermost clamping body into the closed position, so that the straight metal rod element is laterally clamped between the longitudinal grooves of the clamping bodies, whilst the end portion of the straight metal rod element which comprises the head end and is to be plastically deformed projects over a short length relative to the clamping bodies.
  • the second hydraulic cylinder forces the deformation member against the head end of the straight metal rod element with a force which is sufficiently large to plastically deform the projecting end portion having that head end ("cold upsetting"). This produces the thickened head on one end of the straight metal rod element.
  • the first hydraulic cylinder moves the uppermost clamping body back into the open position. Since the straight metal rod element, during the cold upsetting, is tightly clamped between the longitudinal grooves of the clamping bodies, there is the risk that, when the uppermost clamping body is moved into the open position, the straight metal rod element remains fixed in the longitudinal groove of the lowermost or uppermost clamping body.
  • An object of the second aspect of the invention is to provide an improved combination of at least two clamping bodies, in particular for use in connection with a device for forming a metal handle for a bucket or a bucket handle fitting device for fitting a metal handle to a bucket.
  • first clamping body is provided with a hook-shaped projection projecting from the clamping surface thereof
  • second clamping body is provided with a recess made in the clamping surface thereof, and the hook-shaped projection of the first clamping body can be received in the recess of the second clamping body when the clamping surfaces of the clamping bodies abut one against the other.
  • a metal rod element can be clamped, for example a straight metal rod element having a constant cross section over the entire length thereof, such as a round cross section, so that the cold upsetting against a head end of the metal rod element in order to form the thickened head is possible.
  • the hook-shaped projection of the first clamping body can be received in the recess of the second clamping body.
  • the presence of the hook-shaped projection and the recess therefore has no impact, or scarcely any impact, on the clamping of the metal rod element.
  • the clamping surfaces of the clamping bodies move apart.
  • the hook-shaped projection thereby engages laterally on the metal rod element and therefore pulls loose the metal rod element accommodated between the longitudinal grooves.
  • the removal of the metal rod element after the cold upsetting of the thickened head is hereby strongly improved.
  • the hook-shaped projection is provided with a support part, which extends substantially transversely from the clamping surface of the first clamping body, and a hook part, which extends substantially transversely from the support part at a distance from the longitudinal groove in the clamping surface of the first clamping body.
  • the metal rod element is first placed on the support part.
  • the metal rod element is then located between the longitudinal groove and the hook part of the first clamping body.
  • the clamping surfaces of the clamping bodies move towards each other, so that the metal rod element is pushed by the longitudinal groove of the second clamping body, via the support part, to the longitudinal groove of the first clamping body, until the metal rod element is captured between the longitudinal grooves.
  • the clamping surfaces of the clamping bodies move apart, whereupon the hook part of the first clamping body pulls the metal rod element out of the longitudinal groove of the second clamping body.
  • the support part is provided with a support surface for the depositing of a metal rod element thereon, wherein the support surface is aligned relative to the longitudinal groove of the first clamping body.
  • the support surface is aligned relative to the longitudinal groove of the first clamping body, a substantially fluid or continuous transition is found between the support surface and the longitudinal groove of the first clamping body.
  • the clamping of the metal rod element is hereby reliable.
  • the longitudinal grooves of the clamping bodies are each provided with at least one clamping rib, wherein the clamping ribs are configured to, when the clamping surfaces of the clamping bodies abut one against the other and a metal rod element is accommodated in the receiving cavity, laterally clamp that metal rod element.
  • the clamping ribs are pressed laterally into the metal rod element.
  • a circumferential groove of small depth is hereupon formed in the metal rod element by plastic deformation.
  • the clamping bodies are each provided with a substantially flat stop face, which extends substantially perpendicularly to the longitudinal groove, wherein the stop faces of the clamping bodies can be aligned in a common plane when the surfaces of the clamping bodies abut one against the other, and wherein, when a metal rod element is accommodated in the receiving cavity, the head end thereof projects relative to the stop faces, and wherein the combination comprises a deformation body, which is provided with a deformation surface which is configured to, when the clamping surfaces of the clamping bodies abut one against the other and a metal rod element, having a head end projecting relative to the stop faces, is accommodated in the receiving cavity, plastically deform that head end in order to form the thickened head.
  • the deformation surface is provided with a deformation cavity which substantially corresponds to the thickened head to be formed.
  • the deformation cavity is made in the deformation surface of the deformation body such that, when the clamping surfaces of the clamping bodies abut one against the other and a metal rod element is accommodated between the longitudinal grooves with a head end projecting relative to the stop faces of the clamping bodies, that head end ends up in the deformation cavity when the deformation body is placed with the deformation surface against the stop faces. That end portion of the metal rod element which comprises that head end is hereupon plastically deformed in the deformation cavity in order to form the thickened head.
  • first clamping body and the second clamping body are each provided with at least one fastening hole for the releasable fastening of that clamping body.
  • the clamping bodies are, for example, releasably fastened to a device for forming a metal handle for a bucket.
  • the releasable fastening can be constructed in various manners.
  • each clamping body comprises at least one bolt hole for the bolting of the clamping body.
  • the releasable fastening of the clamping bodies enables the clamping bodies to be easily exchanged. This is favourable if a bucket handle fitting device or a device for forming a metal handle for a bucket is converted for use in connection with metal handles of a different diameter. Given a different diameter of the metal rod elements, the head end is no longer accurately aligned relative to the deformation cavity in the deformation surface of the deformation body. The position of the deformation cavity is usually fixed. By exchanging the combination of clamping bodies for a different combination of clamping bodies, the diameter of the longitudinal grooves and the height of the support surface of the hook-shaped projection can be easily adapted to the position of the deformation cavity.
  • the clamping bodies and/or the deformation body can comprise various materials which are suitable for the clamping and cold upsetting of the metal rod element.
  • the first clamping body and/or the second clamping body and/or the deformation body can be made of hardened steel.
  • the invention further relates to a clamping device for clamping a metal rod element, comprising a combination of clamping bodies as described above.
  • the first clamping body can be movable, whilst the second clamping body is fixed.
  • the invention also relates to a device for forming a thickened head on a head end of a metal rod element, comprising a combination of clamping bodies as described above, and/or such a clamping device.
  • the invention also relates to a device for forming or manufacturing a metal handle for a bucket, comprising a combination of clamping bodies as described above, and/or sucha device for forming a thickened head on a head end of a metal rod element.
  • the invention relates to a bucket handle fitting device for fitting a metal handle to a bucket, comprising a combination of clamping bodies as described above, and/or such a device for forming or manufacturing a metal handle for a bucket.
  • the device for forming metal handles for plastic buckets is denoted in its entirety with reference numeral 1 in Figure 1 .
  • the device 1 forms part, for example, of a bucket handle fitting machine for fitting plastic buckets with metal handles.
  • the metal handles are produced from straight metal rod elements 2, which are accommodated in a magazine of the device 1 (not represented).
  • the device 1 comprises a displacement mechanism for step-by-step displacement of the straight metal rod elements 2 through the device 1 - from bottom to top in Figure 1 .
  • the displacement mechanism comprises two movable horizontal bars 4, which are each provided with notches for supporting the straight metal rod elements 2.
  • the movable bars 4 can displace the straight metal rod elements 2 in the horizontal and vertical directions.
  • the displacement mechanism guides a straight metal rod element 2 derived from the magazine firstly along a first device 6 for forming a thickened head or upsetting head 5 on a head end of the straight metal rod element 2 (on the left in Figure 1 ). After the left-hand end of the straight metal rod element 2 has been provided with a thickened head 5, the rod element 2 is brought along a second device 6 for forming a thickened head 5 on a head end of the straight metal rod element 2 (on the right in Figure 1 ). The second device 6 forms a second thickened head 5 on the right-hand end of the straight metal rod element 2.
  • the straight metal rod element 2 having the thickened heads 5 on both ends is led through to a device 7 for bending over the head ends of the rod element 2 at right angles.
  • a forming device 9 bends the metal rod element 2 having the bent-over head ends 8 around a forming plate 10, so that the desired handle shape for the bucket is formed.
  • the various shapes of the metal rod element 2 as it passes through the device 1 are represented in Figures 3a-3g .
  • the device 6 for forming a thickened head 5 on a head end of the straight metal rod element 2 shall now be described in greater detail.
  • the device 6 comprises a clamping device for the tight clamping of the metal rod element 2.
  • the clamping device is provided with a fixed clamping body 14 (fixed clamping nipple) and a movable clamping body 15 (movable clamping nipple).
  • the movable clamping body 15 is movable between a first, open position and a second, closed position.
  • the movable clamping body 15 In the open position, the movable clamping body 15 is located at a distance from the fixed clamping body 14, so that the straight metal rod element 2 can be lowered between the clamping bodies 14, 15 and can be removed from therebetween. In the closed position, the clamping bodies 14, 15 press one against the other and the straight metal rod element 2, by an end portion thereof, is laterally clamped between the clamping bodies 14, 15.
  • the fixed clamping body 14 comprises a first clamping surface 50 and the movable clamping body 15 comprises a second clamping surface 51.
  • a longitudinal groove 53 and 54 is made in each clamping surface 50, 51.
  • the longitudinal grooves 53, 54 of the clamping bodies 14, 15 jointly form in the closed position a receiving cavity for receiving an end portion of the straight metal rod element 2. When the end portion of the straight metal rod element 2 is captured in the receiving cavity, buckling of the end portion is prevented.
  • the longitudinal grooves 53, 54 of the clamping bodies 14, 15 each possess a plurality of clamping ribs 61.
  • the clamping surfaces 50, 51 of the clamping bodies 14, 15 press tightly one against the other, whereby the clamping ribs 61 laterally engage on the metal rod element 2.
  • the exerted pressing force is, for example, such that the clamping ribs 61, by plastic deformation, form circumferential grooves in the clamped end portion of the metal rod element 2.
  • the clamping bodies 14, 15 each comprise a substantially flat stop face 62 and 63, respectively, which extends substantially perpendicularly to the longitudinal grooves 53, 54.
  • the clamping bodies 14, 15 are aligned relative to each other such that the stop faces 62, 63 lie in a common plane.
  • the stop faces 62, 63 form an anvil surface, which shall be explained below.
  • the device 6 is provided with a stop element 32 having a stop face for the head end of the metal rod element 2 to be clamped (see Figures 2a and 2b ).
  • the stop face of the stop element 32 runs substantially parallel to and at a distance from the stop faces 62, 63 of the clamping bodies 14, 15.
  • the head end of the metal rod element 2 to be clamped in the axial direction thereof, is aligned against the stop face of the stop element 32, for example by means of a pneumatic cylinder which pushes against the opposite head end.
  • the distance between the stop face of the stop element 32 and the stop faces 62, 63 of the clamping bodies 14, 15 determines the length over which the head end of the straight metal rod element 2 projects relative to the stop faces 62, 63 of the clamping bodies 14, 15.
  • the stop element 32 is displaceably fastened to a guide 33, which extends substantially parallel to the rod element 2 to be clamped.
  • the stop face of the stop element 32 can hereby be fixed at various distances from the stop faces 62, 63 of the clamping bodies 14, 15.
  • the adjustable stop element 32 is freely accessible from above, so that the adjustment of the stop element 32 is quick and simple.
  • the device 6 comprises a deformation body 6 (upsetting nipple) for the plastic deformation of the end portion of the metal rod element 2 which projects relative to the stop faces 62, 63 of the clamping bodies 14, 15 after the straight metal rod element 2 has been tightly clamped.
  • the deformed end portion of the metal rod element 2 forms the thickened head 5.
  • the plastic deformation takes place at room temperature (“cold upsetting").
  • the deformation body 16 is provided with a deformation surface facing towards the stop faces 62, 63 of the clamping bodies 14, 15.
  • the deformation surface is provided with a deformation cavity which substantially conforms to the thickened head 5 to be formed.
  • the deformation body 16 is movable between a first, rest position and a second, upsetting position. In the rest position, the deformation surface of the deformation body 16 is located at a distance from the head end of the metal rod element 2. In the upsetting position, the deformation body 16 is displaced from the rest position to the stop faces 62, 63 of the clamping bodies 14, 15 and the projecting end portion of the metal rod element 2 is plastically deformed in the deformation cavity of the deformation body 16.
  • the length over which the end portion projects determines a quantity of material which, through plastic deformation, leads to the thickened head 5. If too much or too little material is deformed, the thickened head 5 does not acquire the desired shape. In the event of an excessively projecting end portion, the material is forced during the upsetting, for example, outside the deformation cavity of the deformation body 16. With the above-stated stop element 32, the projecting length is accurately adjustable, so that the shape of the thickened head 5 is assured.
  • the movable clamping body 15 moves back into the open position.
  • the movable clamping body 15 is provided with a hook-shaped projection 56 projecting from the clamping surface 51.
  • the hook-shaped projection 56 comprises a substantially horizontal support part 57 and a substantially vertical hook part 58.
  • the support part 57 has an uppermost support surface 59, on which the metal rod element 2 rests after the placement of the rod element 2 between the clamping bodies 14, 15 in the open position.
  • the support surface 59 continues continuously into the longitudinal groove 54.
  • the hook part 58 juts up from the end of the support part 57 which faces away from the clamping surface 51.
  • the fixed clamping body 14 comprises a recess 60 in the clamping surface 50.
  • the hook-shaped projection 56 of the movable clamping body 15 is accommodated in the recess 60 of the fixed clamping body 14.
  • the hook part 58 then back-grips the clamped metal rod element 2.
  • the fixed clamping body 14 and the movable clamping body 15 are releasably fastened by means of bolts in bolt holes 64, 65.
  • the clamping bodies 14, 15 are made, for example, of hardened steel. Nevertheless, the working life of the clamping bodies 14, 15, as a result of the considerable loads, is limited to about 2 million upsetting actions. After this, the clamping bodies 14, 15 must be replaced. According to the invention, the bolted connections are easily accessible from above (see Figure 1 ), such that the replacement of the clamping bodies 14, 15 is quick and simple.
  • the deformation body 16 exerts a considerable force upon the projecting end portion of the metal rod element 2 in order to plastically deform that end portion into a thickened head 5.
  • a drive device is provided, which drive device will be described in greater detail below with reference to Figures 4-7 .
  • the drive device is provided with a linear drive unit 18, which in this illustrative embodiment is constructed as a pneumatic cylinder having a drive rod 19.
  • the drive rod 19 is movable back and forth relative to the pneumatic cylinder 18.
  • the pneumatic cylinder 18 together with the drive rod 19 are articulated about a hinge axis 29.
  • the end of the drive rod 19 which can be moved back and forth is hingeable about a hinge axis 20 connected to a transmission element 21.
  • the transmission element 21 is pivotable about a pivot axis 22, which runs substantially parallel to the hinge axes 29, 20.
  • the transmission element 21 comprises a cam track 23, which in this illustrative embodiment is configured as a curved track or curve path.
  • a supporting roller 26 which is placed rotatably about a rotational axis 30 on a bottom end 25 of a lever arm 24.
  • the rotational axis 30 runs substantially parallel to the pivot axis 22.
  • the lever arm 24 is fastened by means of a bolted connection (see Figure 6 ) to a U-shaped holder 28.
  • the U-shaped holder 28 and the lever arm 24 are jointly articulated about a hinge axis 27 running substantially parallel to the pivot axis 22.
  • To the top end of the lever arm 24 is fastened the deformation member 16.
  • the curve path 23 of the transmission element 21 comprises a path having a start point and an end point. This path does not run concentrically relative to the pivot axis 22. Each point of the path of the curve path 23 is determined by the distance between that point of the path and the pivot axis 22 and the angle between the connecting line from that point to the pivot axis 22 and the connecting line from the start point to the pivot axis 22. The path of the curve path 23 is thus configured such that said distance is truly proportional to said angle.
  • each mm of travel of the drive rod 19 produces a proportional displacement of the supporting roller 26 of the lever arm 24.
  • the deformation body 16 exerts a substantially constant force upon the projecting end portion of the metal rod element 2, whilst the supporting roller 26 of the lever arm 24 follows the path of the curve path 23.
  • the movement of the drive device is represented schematically in Figures 7a, 7b .
  • the movable clamping member 15 is drivable by a second drive device, which in this illustrative embodiment is configured in the same way as the drive device for driving the deformation member 16.
  • the second drive device therefore comprises a second drive unit, a second lever arm 44 and a second transmission element, which latter is pivotably connected between the second drive unit and the second lever arm 44.
  • the second drive unit is constructed as a pneumatic cylinder 38, having a drive rod which can be moved back and forth.
  • the second lever arm 44 comprises on the top end the movable clamping body 15 and on the bottom end a rotatable supporting roller 46, which abuts against a curve path of the second transmission element.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP19193156.7A 2010-10-26 2011-10-26 Device and method for forming a thickened head on the head ends of a metal rod element Pending EP3608032A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2005580A NL2005580C2 (nl) 2010-10-26 2010-10-26 Inrichting en werkwijze voor het vormen van een verdikte kop aan de kopeinden van een metalen staafelement.
EP11186683.6A EP2446981B1 (en) 2010-10-26 2011-10-26 Device and method for forming a thickened head on the head ends of a metal rod element

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EP11186683.6A Division EP2446981B1 (en) 2010-10-26 2011-10-26 Device and method for forming a thickened head on the head ends of a metal rod element

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EP3608032A1 true EP3608032A1 (en) 2020-02-12

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EP19193156.7A Pending EP3608032A1 (en) 2010-10-26 2011-10-26 Device and method for forming a thickened head on the head ends of a metal rod element
EP11186683.6A Active EP2446981B1 (en) 2010-10-26 2011-10-26 Device and method for forming a thickened head on the head ends of a metal rod element

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NL (2) NL2005580C2 (nl)

Cited By (1)

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CN111545675A (zh) * 2020-05-22 2020-08-18 杨东 一种铜线用的弯折设备

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CN113909405B (zh) * 2021-08-30 2022-07-26 江苏玖泰电力实业有限公司 一种用于水泥杆生产的具有自动翻料功能的液压墩头机
CN114406137B (zh) * 2021-12-31 2023-04-18 江苏玖泰电力实业有限公司 一种水泥杆内部钢筋加工用液压墩头机

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CN111545675B (zh) * 2020-05-22 2022-02-18 江西铜业集团铜材有限公司 一种铜线用的弯折设备

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EP2446981B1 (en) 2019-08-28
NL2008060C2 (nl) 2012-10-23
EP2446981A2 (en) 2012-05-02
NL2005580C2 (nl) 2012-04-27
EP2446981A3 (en) 2012-07-18
NL2008060A (nl) 2012-04-27

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