CN106111855A - Feedway for forming machine - Google Patents

Abstract

A kind of feedway for forming machine, this feedway is for being supplied to the shaped device of forming machine by slender piece especially line or pipe from workpiece storage device, this feedway has at least one donor rollers pair, it has two donor rollers (400), this donor rollers is arranged to have the rotation axis being parallel to each other and can drive with mutually opposing rotation mode, and is limited for guiding the supply roll gap by workpiece by the circumferential surface (410) of belt profile.The each of donor rollers is fastened to an end of the supply axle (300) that be associated to install rotatably with interchangeable mode by roller tension system.Roller tension system has stretching screw (500), and it is positioned at center relative to the rotation axis of donor rollers and has threaded portion (520) and relative to the broader head of threaded portion (510).Tectonic gap (530) in stretching screw, its cephalad opens wide and has non-circular profile of carrying secretly for guiding tensioning tool.

Description

Feedway for forming machine

Technical field

The present invention relates to a kind of feedway for forming machine, this feedway is for being supplied to the shaped device of forming machine by slender piece especially line or pipe from workpiece storage device, and relates to the forming machine of a kind of feedway with the type.

Background technology

Forming machine is machine tool, its in automatic manufacture process with the help of suitable tools main by molding can by elongated semi-finished product such as line, manage, band or the like produce have in some cases complex geometry less or large quantities of profiled part.Such as, forming machine could be for by the bending of wire material, carrying material or tubular material produced two dimension or the bending machine of three-dimensional bending component, or could be for by spring wrap or spring holder around the spring production machine of the profiled part manufacturing compression spring, stretching spring, pole spring (yoke spring) or other types of springs.

In order to effectively manufacture the profiled part of large volume, the computerized numerical control multi-shaft wire molding machine of currently used high productivity.Such forming machine has multiple controllable machine axis, drive system and controls device, this drive system has multiple electric drive so that driven machine axis, and this control device coordinates to activate the operational movement of machine axis in process of production for controlling program according to the computer-readable being exclusively used in production process.

In the manufacture of the line parts of coil spring or other molding, the shaped device of forming machine correspondingly extracted from workpiece storage device (such as reel) or transports while being controlled programme-control by the feedway of forming machine by NC out by line (spring wire).Supply line is shaped to coil spring or other profiled parts by shaped device with the help of the instrument of shaped device, and described shaped device is in downstream on transport of materials direction.After completing forming operation, final molding parts are cut off from supply line by cutter sweep while being controlled programme-control by NC.For each profiled part to be fabricated, this ground circulation program loop.

The feedway of type discussed herein has at least one donor rollers pair, and it has two donor rollers, and these two donor rollers are arranged to have the rotation axis being parallel to each other and can drive with mutually opposing rotation mode.Donor rollers limits supply roll gap by the circumferential surface of its belt profile to guide by workpiece (such as line or pipe).The indexing speed of material to be treated and index direction can be come pre-qualified by the rotary speed and direction of rotation that control donor rollers.

Donor rollers is intended to as far as possible without the offer material transport by supply roll gap slippingly, and therefore should be bonded on material to be transported still to apply big tightening force by gentle in the way of friction lock.Each free end being fastened to the supply axle being associated by roller tension system of donor rollers.Supply axle is couple to driver and driving force is delivered to donor rollers.Should connection between fixed supply axle and donor rollers rotatably, so as to the rotation of zero-lash supply axle is converted to carriage movement.The machine element of the geometry of handled workpiece it is depending on, so donor rollers should be able to be replaced in relatively simple manner by machine operator due to donor rollers.

Feedway is generally arranged to the region of the shaping jig of relatively close shaped device.In the case of modern forming machine, at nearly shaped device, typically require installing space so that attachment Accessory Members, be such as used for the camera of observation program during molding.Therefore, if it would be possible, feedway should need few installing space in the region being very suitable for attachment Accessory Members.

Summary of the invention

Present invention purpose based on the feedway providing the type mentioned when starting, it gives the quick replacement of donor rollers together with reliable function, and needs the little installing space outside donor rollers in addition.

This purpose is by having the feedway of the feature of claim 1 and being achieved by having the forming machine of the feature of claim 15.The favourable improvement of statement in the dependent claims.The term that all authority requires is incorporated by reference in the description at this.

According to the invention advocated, roller tension system has stretching screw, and this stretching screw is positioned at center relative to the rotation axis of donor rollers and has threaded portion and head, and this head is wider relative to threaded portion.Stretching screw has gap, and its cephalad opens wide and has for guiding the non-circular of tensioning tool to carry profile secretly.

Threaded portion is intended to be arranged in the side internal whorl of supply axle, so as to be screwed into by stretching screw in supply axle.It is used for carrying donor rollers on the supply spool relative to the head of threaded portion axial dipole field.

The stretching screw being also known as central tension screw in this application can be the unique strain component that must be activated by operator of the connection between supply axle and donor rollers.Need not and be the most also not provided with other strain components of individually actuating.Thus, in order to replace donor rollers, below may be sufficient to: operator's only release tension screw, donor rollers use another donor rollers replace, and the most again fastens or strain described stretching screw.Thus, change donor rollers be greatly simplified and only need a small amount of time.In order to strain and release tension screw, it is only necessary to a tensioning tool, it has mounted to the part in the space that cephalad opens wide and has non-circular the non-circular of outline of carrying secretly with space and carry profile secretly.

Gap owing to being opened wide by cephalad is implemented the rotational lock between stretching screw and tensioning tool and is connected, so head can get optimization at its vpg connection according to other functions of described head.Especially, head can be relative flat, because can the reliability that connects of the rotational lock between optimization tensioning tool and stretching screw by having the shape in the non-circular gap carrying profile secretly and the degree of depth.Especially, for example, it is possible to limited the head of stretching screw by cylindrical shape circumferential surface so that described head can design in rotationally symmetrical mode in addition to gap area.Thus can realize especially being uniformly distributed of tightening force during the tension of stretching screw.

In a preferred embodiment, clearance configurations is internal hexagon gap.Thus, when stretching screw is tightened up, can correspondingly realize the highest moment of torsion or tension moment of torsion with the help of there is the commercially available tensioning tool of external hexagonal cross section.But, other are non-circular, and to carry profile secretly also possible.The gap opened wide can have internal pentagon profile, inner square profile, internal multiple tooth profile or have the slot type profile of intersecting trough the most alternatively.

The gap that makes that the gap that cephalad opens wide can be deep is projected in the region of threaded portion.Thus be conducive to the reliable delivery of even high torque.

Improve according to one, it is provided that being configured to the gap in through gap, it is axially through stretching screw.Thus, on the one hand, the deepest gap can be realized make to obtain enough power transfer surfaces on profile carrying secretly.And, being immediately adjacent to of central area of the free end of supply axle is provided by the through gap of continuous print.In the case of many feedwaies, it is positioned at herein for lubricant is fed to supply the lubrication connection of the oil site of axle.Therefore, can implement to introduce lubricant via lubrication connection when straining described stretching screw.

Improveing according to one, stretching screw is configured to flat head dummy stretching screw, and wherein the height (when with the axis horizontal survey of stretching screw) of head is less than the diameter of threaded portion.The flat head of the type only needs relatively small installing space at supply roll surface on the side of supply axle so that camera or other appurtenances may be positioned such that relatively close donor rollers and are arranged on there when needed.Thus, especially provide and monitor the manufacture of the shortest spring by measurement system based on camera and measurement result based on camera system controls the possibility of described manufacture alternatively.In certain embodiments, the height of head less than threaded portion diameter 50%, the overall shape of the most flat head dummy stretching screw with for other purposes and the shape of the many stretching screws provided is dramatically different.

Giving the structure of flat head dummy stretching screw in particular, in that stretching screw has the gap that cephalad opens wide, described gap is sufficiently used for applying tensioning tool.

In certain embodiments, (maximum) diameter of head is at least the twice of size of diameter of threaded portion.Head with its highly compared with can be the most correspondingly relatively wide or plane degree.Under by holding state, the wide head of the type can directly carry (the most especially in the case of separator not having intermediate arrangement or the like) when needed and and thus tightening force is delivered to donor rollers on the outside of donor rollers.

Head can be that the described inner side that makes of plane can be carried on the outside of the also donor rollers of plane on large regions towards the inner side of threaded portion.But, it is confirmed that can be favourable when arranging the most flat gap on the inner side of head so that project upwards in the side of threaded portion is formed on the neighboring of head around annular bearing.Exclusively transmit tightening force by the contact surface in the region of radially outward annular bearing during thus can be implemented in the described stretching screw of tension, the most correspondingly support the reliable delivery of especially moment of torsion and the most reliably carry secretly.

Annular bearing can be closed in circumferential direction, but this is not necessarily.Described annular bearing can be made up of one or more annular segments, there is interval between annular segment in circumferential direction.Usually, multiple loading ends in relatively small region or bearing area can be correspondingly configured to be distributed in the circumferential, the most definitely three loading ends.If it is required, can thus the distribution of power of influence.

Several embodiments are characterised by separator, and it is arranged in the head of stretching screw and donor rollers between side or the outside of head by partial response at least one under the installment state of donor rollers.With the help of separator, the tightening force that produced by stretching screw can be distributed on large regions, thus, the friction lock of improvement between stretching screw and donor rollers can be realized.

In the mode similar in appearance to tradition separator, separator can be closed in circumferential direction, say, that can only have an internal port to guide and passing through threaded portion.The modification of a kind of separator is especially advantageous, wherein this separator has for guiding the port by threaded portion, wherein said port is transitioned into radially continuous transverse opening on a side, span width (measuring on the direction tangent with the circumferential direction) overall diameter more than threaded portion of this transverse opening and the maximum gauge less than head.Can embed or remove the separator of the type without stretching screw being turned on completely from donor rollers.Stretching screw can thereby remain under the state that stretching screw is partly screwed into donor rollers.

Make on the inner side that prominent annular bearing is formed on the neighboring of separator towards radially-inwardly gap can be arranged on the inner side of donor rollers at separator.Annular bearing can be continuous print in circumferential direction.Alternatively, can also be formed in the multiple annular segments separated in circumferential direction or bearing area to obtain the most limited bearing area at specified point.In a modification, correspondingly there will be three loading ends or bearing area definitely, thus there is the effect of three-point mount.

By only providing (one or more) loading end on the periphery of separator, the region between separator and donor rollers with friction lock offsets in radially mode relative to common rotating shaft line, thus, can obtain in stretching screw/moment of torsion transmission of improvement between separator and donor rollers.

Separator can have circle or circular-arc-shaped exterior contour.But, this is not necessarily.Can also be the outline of other shapes, such as polygonal shape such as triangle, square or hexagon, there is cavetto corner alternatively.

When using (laterally-opening or closing) separator, head need not transmit force directly to the outside of donor rollers.Therefore, head may be selected to be relatively small at diametrically.In several embodiments, supply axle has axle ring with the side associate member being contiguous to axle ring so that donor rollers is closed in inserting, and donor rollers has central through hole, and the interior diameter of described central through hole is more than the overall diameter of associate member.When installing donor rollers, donor rollers can be inserted and is coupled on associate member and push ahead until it is carried on axle ring, and then associate member is bonded in port.The overall diameter of the head of stretching screw is smaller than the interior diameter of through hole so that removable roller is without being discharged by stretching screw completely.

It is especially advantageous that this size design of head combines laterally-opening separator, because in order to replace donor rollers, stretching screw only needs to be released without back-outing completely in this case.In the case of stretching screw is released, then separator can laterally be removed and donor rollers can be by the top tractive of external screw head.Then implement the installation of another donor rollers with reverse order, i.e. before laterally introducing separator and subsequently stretching screw being strained, primitively above screw head, donor rollers is shifted onto on associate member.

The press-fit that stretching screw contributes to supplying between axle and donor rollers connects, and some of the concrete measure mentioned can aid at this improves press-fit so that rotating against between supply axle and donor rollers is avoided or greatly stops.

During some, donor rollers is exposed to high acceleration (increase of rotary speed) or is exposed to deceleration (minimizing of rotary speed) in the way of the most alternately alternatively so that can not get rid of the connection that can discharge exclusively press-fit lentamente.Thus, extra measure is provided in many examples to supply foundation effect press-fit in circumferential direction between axle and donor rollers.

In certain embodiments, supply axle has axle ring, this axle ring has side loading end to carry donor rollers, at least one is carried bolt secretly and is attached to axle ring, this at least one carry secretly bolt protrude past loading end, relative to rotation axis off-center position and be sized so as to be incorporated into the cam lock of donor rollers with holes in.Arranging multiple especially three, bolt of carrying secretly in certain embodiments and carry bolt secretly, it is distributed around central axis with uniform angular separation.For installation and the dismounting of beneficially donor rollers, generally by carrying the hole of carrying secretly that bolt is disposed relative to be distributed secretly, there is the least size so that the overall diameter carrying bolt secretly slightly less than carries the interior diameter in hole secretly to retain little play in radial directions.

But, coordinate to obtain reliable form in these cases between supply axle and donor rollers, play compensation device is set in certain embodiments, its can by support stretching screw activate so that support stretching screw time carry secretly bolt and carry secretly between hole exist any play be eliminated.So, can obtain form cooperation in circumferential direction makes the gradually release after repeatedly accelerating and slowing down be avoided.

Play compensation device activates by supporting stretching screw, say, that need not from the discrete actuating element of stretching screw.In several embodiments, this is achieved by: play compensation device has play compensating element, it is arranged in carries secretly on bolt and radially expandable by acting on axial force thereon, described play compensation device be sized so that under the relaxation state of play compensation device (such as, that is when stretching screw is back-outed or part discharges), in the case of donor rollers is carried on axle ring, the actuation part of play compensation device protrudes past the side of the off-axis ring in face of donor rollers.If then stretching screw is tightened up, and thus reach tension, then the head (or separator of intermediate arrangement between head and donor rollers) of stretching screw is pressed on actuation part and axial force is applied on play compensating element, react as it, this play compensating element, radial expansion, thus eliminate and carry bolt and the play carrying secretly between hole secretly.

In one embodiment, being used by the molded element of resiliency compressible and realize simple structure effective play compensation device again for play compensating element, this molded element is compressed by externally actuated sleeve pipe when straining described stretching screw.Molded element can be such as from the O of resiliency compressible elastomer.

The invention still further relates to the forming machine with shaped device and feedway, described shaped device has one or more shaping jig, and described feedway is for being supplied to the region of shaped device by slender piece especially line or pipe from material stock device.Described feedway is the feedway of the type described in this application.Especially, forming machine can be spring production machine or other line datatrons, or pipe bending machine.

Accompanying drawing explanation

Other advantages of the present invention and aspect come from claims and come from description below the preferred illustrative embodiment of the present invention, and it is discussed below by accompanying drawing, in the accompanying drawings:

Fig. 1 illustrates a small amount of element of CNC spring wrap machine according to an embodiment of the invention；

Fig. 2 illustrates the oblique perspective view of the element including the shaped device of coiling machine and upstream feedway；

Fig. 3 illustrate according to an exemplary embodiment by supply axle and the longitudinal profile of donor rollers mounted thereto；

The enlarged drawing of the details of the play compensation device that Fig. 4 is shown in the exemplary embodiment of Fig. 3；

Fig. 5 illustrates the axial view of the assembly of Fig. 3；

Fig. 6 illustrate according to another exemplary embodiment by supply axle and the longitudinal profile of donor rollers mounted thereto；

Fig. 7 illustrates the axial plane view of the exemplary embodiment of Fig. 6；

Fig. 8 illustrates the oblique perspective view of the separator of the exemplary embodiment of Fig. 6；

Fig. 9 illustrates the oblique perspective view of the central tension screw of the exemplary embodiment of Fig. 6；

Figure 10 illustrates the modification with triangular shaped separator；

Figure 11 is the plan view of separator shown in Figure 11 A, and by having the section of the separator of three bearing areas on neighboring shown in Figure 11 B.

Detailed description of the invention

Schematic general view in Fig. 1 illustrate according to an exemplary embodiment with the element of the forming machine of CNC spring wrap machine 100 form.Spring wrap machine 100 has the feedway 110 in the region that the continuous lines of line 115 is partly supplied to shaped device 120, and line 115 sends from line storage appts and guides in the way of numerical control scale-division profile and passes through alignment unit.With the help of the numerical control instrument of shaped device, line is shaped to helical spring F.

Instrument especially includes that two are wound around pins 122,124, its angle being arranged to offset 90 ° and be adjustable in terms of its position, so that it is determined that the diameter of produced spring.Pitch tool 130 has tip, its be arranged generally perpendicular to axle of spring and in progress, be bonded on spring spire outside.The pitch of spire can be come pre-qualified in this way.Numerical control separating tool 150 is arranged in above spring, and this separating tool is moved when forming operation terminates from the helical spring manufactured by the line storage appts cut-out of supply by vertical operation.Separating tool also may be arranged at below spring, such as having the spring of another winding direction.

Machine axis as the CNC machine of the part of instrument is controlled by computerized numerical control device 180, and this numerical control device 180 has storage device, controls software and is positioned in storage device, controls software and especially includes controlling program for the NC of machine axis operational movement.

In order to make helical spring, the line started from shown position is being wound around pin 122 with the help of feedway 110, on the direction of 124 index, and by be wound around pin deflect into desired diameter construct simultaneously circular arc be flexed up to free thread end arrival pitch tool 130.When further line indexes, the helical spring pitch when prelocalization in progress is determined by the axial location of pitch tool.Axially displaced programme controlled pitch tool is controlled by NC when revising pitch during spring is in progress.The actuating movement of pitch tool substantially builds the pitch profile along helical spring.

As shown in Figure 2, spring wrap machine is equipped with optical measuring system based on camera to obtain the data of the geometric construction about the spring currently manufactured in real time and in a non contact fashion.Measurement system has CCD camera 250, and it is arranged on and is fixed on the support member of machine and can provide two dimensional image via interface to the image processing system being connected to described interface.Software for image procossing provides in program module, and this program module correspondingly control device 180 with spring wrap machine interacts or is incorporated into wherein.

Camera is laterally tightened near line guide in the region in the direct front of feedway 110, and described camera can be conditioned in terms of its position.Camera 250 near machine is attached to the rectangular field so that its image can directly obtain a part for spring when progress when leaving shaping jig, in order to determine produced spring geometric construction.

Feedway 110 makes line index with indexing velocity profile that can be pre-qualified.Here, feedway is from line storage appts (such as from spool) little by little withdrawal string, line is directed to the shaping jig of shaped device.Feedway has two donor rollers to 112 and 114, its at workpiece by being serial on direction.The each of this donor rollers pair has two donor rollers, and it is arranged to have the horizontal axis of rotation being parallel to each other.By driver, donor rollers can be driven with mutually opposing rotation mode, in order to obtain conveying motion.Donor rollers has the circumferential surface of belt profile, this circumferential surface have in circumferential direction around passage, the shape and size around passage are adapted to wait the cross section of the associated workpiece carried.The donor rollers of one donor rollers pair limits, by circumferential surface, the supply roll gap that workpiece is conducted through.

Each free end being positioned at the supply axle being rotatably installed in machine frame of donor rollers, rotation axis is level.Donor rollers each to install the end of the supply axle being fastened to be associated by roller tension system with alternative rotatably.Roller tension system must complete multiple task.On the one hand, it is necessary to assure the most rotatably fastening is installed so that the rotary motion of supply axle is delivered to donor rollers and to the workpiece carried by donor rollers without slip mode.On the other hand, operator should be able to the most cosily and be rapidly carried out the replacement of roller.Such as when recombinating for the forming machine of other types workpiece (such as having the line of other diameters) to be used, need to replace roller.When donor rollers is worn, the operation required for replacement should also need to the fewest time.Finally, roller tension system should also construct so that needing the least installing space in the front region of donor rollers, such as so as to camera 250 to be moved into neighbouring feedway, the most captured line when the capture range making described camera 250 can leave line guiding piece online, is caused and can also be observed by camera in the case of manufacturing the shortest spring.

By Fig. 3 to Fig. 5, the first example of roller tension system will be discussed now.Longitudinal profile in figure 3 illustrates supply axle 300, and it can pass through distributed driver and drive with various direction of rotation with various rotary speeies around rotation axis 310.Broadening of axle ring 302(i.e. diameter, this provides planes, bearing plane 303 for donor rollers 400 on the leading flank of ring) structure in axle main body loading end so that close to the free end of supply axle.

Three eccentric clamp strap bolts 320 are fastened in axle ring, this carry secretly bolt 320 the most circumferentially offset from each other 120 ° and extend make axially in parallel with rotation axis 310 and each for being incorporated into the carrying secretly in hole 402 of donor rollers.The associate member 304 with cylindrical outer profile projects upwardly beyond axle ring 302 in the side of the free end of supply axle.Donor rollers 400 sucking fit in the axial direction being associated is on associate member, until donor rollers 400 is carried on the loading end 303 of axle ring 302.

The side central blind hole 306 with internal whorl 308 is positioned at the free end of supply axle.The flat base portion in this hole is positioned to mutually neat with axle ring 302.The described flat base portion in hole it is attached to for supplying the central lubrication joint 380 of the lubricating system of axle.The swivel bearing of supply axle can make with lubricator to supply via lubrication connection.

Supply axle supports the donor rollers 400 being associated on its free end.Donor rollers 400 sucking fit is on associate member 304 and be carried on the free leading flank of axle ring 302.The axial height a few tenths of millimeter less than the thickness of donor rollers (when measuring in the axial direction) of associate member 304.Donor rollers has the circumferential surface 410 of belt profile, and two are integrated in circumferential surface 410 around C-shaped groove in this exemplified case, and the shape of C-shaped groove is adapted to the shape of line to be transported.Donor rollers has continuous print three in the axial direction and carries hole 402 secretly, carries the overall diameter carrying bolt 320 secretly that the interior diameter in hole 402 is adapted to be associated secretly so that carries bolt when placing donor rollers secretly and carries secretly in hole with what small horizontal play was installed to be associated.Each donor rollers has a central through hole 406, and the interior diameter of this central through hole 406 is adapted to the overall diameter of associate member 304 so that donor rollers major part is seated on associate member does not has any play.

In shown installation constitution, donor rollers 400 is strained on supply axle 300 by central tension screw 500.Stretching screw is positioned at center relative to the rotation axis 310 of supply axle.Stretching screw is the unique strain component that must be activated by operator of roller tension system, in order to donor rollers is installed to supply axle or remove from supply axle.Stretching screw 500 has threaded portion 520, in the female thread in the space, side 306 that its external screw thread is installed to supply axle.Flat head 510 is configured to integrate with threaded portion, and this head 510 is strained to against axle ring 302 in the face of the planar inner 512 of threaded portion is pressed on the planar outboard of donor rollers 400 and thus by donor rollers by it in the mounted state.As being clearly apparent in Figure 5, head has circle cylinders shape outline.

Being configured to be positioned at the center of stretching screw with the gap 530 of internal hexagon gap form, its cephalad opens wide.Internal hexagon serves as non-circular profile of carrying secretly and carrys out activated tension screw with the tensioning tool that will pass through the respective belt profile with external hexagonal profile.Gap 530 is configured to through gap, its be in the axial direction continuous print make embed stretching screw time by gap can also be close to lubrication connection 380.

Owing to tensioning tool uses center clearance 530 to be used for tension and release tension screw, so head 510 need not especially be configured to tensioning tool to be employed.Thus, head can be configured to support relative to supply axle the purpose of donor rollers in an alternate manner.And, head can be that the stretching screw that makes of relative flat can be configured to flat head dummy stretching screw.Thus, make camera or other appurtenances be moved into closely donor rollers and become possibility.In this exemplified case, the height H(of head is when being parallel to rotation axis 310 and measuring) more small than the overall diameter of threaded portion times, when this example less than the 20% of this overall diameter.On the other hand, the diameter of head is significantly greater than the diameter of threaded portion, such as, is at least twice of the diameter of threaded portion.Thus, it is ensured that wide carrier of head face is in donor rollers.In this exemplified case, head 510 extends beyond and carries hole 402 secretly so that carrying hole 402 secretly is outside covering (consulting Fig. 5) in the case of the stretching screw installed.Thus, not only determine the most attractive solution (consulting Fig. 5), also avoid carrying hole secretly and entered by pollutant.

In there is no a separately shown modification, radially inner flat gap 513 is positioned on the inner side 512 of the head towards threaded portion, this flat gap 513 has been configured to define inner annular bearing 514, and it is around the neighboring of head and to threaded portion the most prominent (refering to dotted line).Thus, head 510 tightening force being applied in donor rollers is applied in the radially outward region of annular bearing fully.Thus, the big effective diameter by limiting achieves the increase of the friction momentum between mutual compression member, in order to as far as possible to transmit feed force without slip mode.

Corresponding flat gap 313 can also be correspondingly disposed on the front side towards donor rollers of axle ring 302 or outside (refering to dotted line).Thus, the annular support surface making donor rollers is formed on the outside of axle ring and can be achieved.

In the case of the stretching screw 500 supported, have on the one hand and correspondingly there will be reliable form between the supply axle of stretching screw and the donor rollers being on the other hand mounted on an axle and coordinate or friction lock.And, carry secretly bolt 320 can help to donor rollers form coordinate carry secretly.But, close to make donor rollers be easier to inserting and remove, it is provided that relative to carrying hole secretly, there is the most undersized bolt so that there is possible reverse play when changing direction of rotation in theory.

In the exemplary embodiment shown, one play compensation device 360(consults Fig. 4), it is automatically activated by the head 510 of stretching screw when stretching screw is tightened up, it is arranged on each carrying secretly in bolt 320 and each join domain carried secretly between hole 402, thus eliminates and carry bolt secretly and carry any residue play that may be present between hole secretly.

Be configured to post bolt, the bolt 320 of carrying secretly of close axle ring has cylindrical shape Part I 312, and the overall diameter of this Part I 312 is only smaller than the interior diameter carrying hole secretly, and is contiguous on it, and forward part 314 has small diameter.With in the molded element sucking fit of O 362 form to forward part, thus it is carried on inner cylindrical member 312.Actuation sleeve 364 is inserted and is coupled to front side, and this actuation sleeve 364 is arranged in forward part 314 in mode in bond and is positioned on O by its side towards axle ring.The length dimension of sleeve pipe is designed such as its bushing head and somewhat protrudes past the planar outboard 414 of donor rollers in a relaxed state (such as when being also fitted without stretching screw).If stretching screw is tightened up now, then head is pressed into by the inner side towards donor rollers in actuation sleeve 364, and thus O is axially compressed, thus is radially broadened by expansion element.Thus, bolt is being carried secretly and any play carrying secretly between hole is expelled this connection in a relaxed state so that this connection is the most in circumferential direction to serve as, without play mode, the connection that form coordinates.

In other words, when straining central tension screw 500, flexible member is compressed axially to be carried secretly on bolt.The radial direction of the described flexible member thus caused broadens to fill in donor rollers and carries bolt and the gap carrying secretly between hole secretly, thus produces form cooperation between bolt and donor rollers carrying secretly, thus avoids any reverse play in donor rollers.

Generally, it is achieved that the press-fit between donor rollers and supply axle and the connection installed rotatably of form cooperation, this can be established and discharge with the help of being connected to single actuating element especially central tension screw 500.

By Fig. 6 to Fig. 9, the another exemplary embodiment of roller tension system will be described now.Roller tension system can use in the supply axle identical with the first exemplary embodiment and identical donor rollers.Therefore, these components are by by using the reference identification identical with the first exemplary embodiment to carry out in addition reference, thus according to the structure of described component to wherein illustrating to make reference.

Roller tension system includes stretching screw 600, and it has head 610, threaded portion 620 and the central interior hexagon for tensioning tool and receives opening 630.Extra in central tension screw 600, also set up separator 700, its head 610 being positioned at stretching screw under the installment state of donor rollers by part 710 at least and donor rollers are towards between the side (planar outer surfaces) of head.Force flux between stretching screw and donor rollers is routed through separator here.

As the most visible, separator is not closed, but is designed to substantially sickleshaped or C-shaped, has transverse opening.Port 725 is transitioned in radially continuous transverse opening 727 on a side at this, and the interior diameter of port 725 is more bigger than the overall diameter of the threaded portion of stretching screw.The span width 728 of this transverse opening measured between the end of the free leg of separator is more bigger than the overall diameter of the threaded portion of stretching screw, corresponds to the twice of the radius of curvature of the circular portion of through hole in this exemplified case.It is the most flat that the interior part 710 of the separator of adjacent through-holes correspondingly compares thick or firmer outer portion 720, and this outer portion 720 abuts directly against the outline of head by its Internal periphery when installing stretching screw.

At separator 700 on the inner side of donor rollers 400, separator 700 has flat radially-inwardly gap 713 and makes to cause the tightening force of stretching screw to be passed to donor rollers in the region of described annular bearing 714 towards donor rollers around annular bearing 714 in the outer region.

The overall diameter of separator may be chosen such that the big spaced radial of the sufficiently large load-bearing surface or deep annular bearing that are respectively used for transmission friction lock causes causing effective friction lock.Owing to being no longer needed for the head 610 that direct force is delivered to the stretching screw 600 of donor rollers, so the diameter of head can be generally little than other exemplary embodiments when using separator.As can be clearly seen in figure 6, the overall diameter D of head 610 is more smaller than the interior diameter of the central through hole 406 of donor rollers.Thus, it is possible to inserting close or remove donor rollers without complete release tension screw 600 and by its from supply axle female thread remove.

When removing donor rollers, from the beginning of the installation constitution that figure 6 illustrates, it next can be following procedure.First, by external hexagonal tensioning tool stretching screw 600 somewhat discharged separator 700 is released.Then can laterally remove separator, this is likely due to the transverse opening of separator.Donor rollers substantially can be pulled open the most in the axial direction, especially exceed the head being partially threaded into of stretching screw.Therefore to implement the replacement of roller, it is not necessary to release tension screw completely.When installing new donor rollers, followed by contrary program, first donor rollers promote the head exceeding stretching screw to associate member 304, the most laterally embed separator, and finally again stretching screw is firmly strained by tensioning tool, then by separator, tightening force is delivered to donor rollers.

Multiple modification are possible.Figure 10 illustrates the modification of separator 1000 by way of example, and it has the generally triangle shaped exterior contour with cavetto corner.As in the case of the modification of Fig. 6 to Fig. 8, horizontal port is set and makes can correspondingly embed when being screwed into stretching screw or remove separator.

Figure 11 is the plan view of separator 1100 shown in Figure 11 A, and by the section of separator 1100 shown in Figure 11 B.As in the case of the modification of Fig. 6 to Fig. 8, flat radially-inwardly gap 1113 constructs at separator 1100 towards on the inner side of donor rollers so that the annular bearing towards donor rollers causes the tightening force of stretching screw to be passed to donor rollers in the region of described annular bearing in the outer region.Interrupt making to correspondingly form annular segment or bearing area 1114-1,114-2 and 1114-3 of three circumferential offset by annular bearing in circumferential direction.

Claims (15)

1. the feedway (110) for forming machine (100), described feedway (110) is used for from workpiece storage device, slender piece especially line or pipe are supplied to the shaped device of described forming machine (120),

There is at least one donor rollers to (112,114), it has two donor rollers (400), said two donor rollers (400) is arranged to have the rotation axis being parallel to each other and can drive with mutually opposing rotation mode, and limited for guiding the supply roll gap by described workpiece (115) by the circumferential surface (410) of belt profile

Wherein, each of described donor rollers is fastened to an end of the supply axle (300) that be associated to install rotatably with interchangeable mode by roller tension system, it is characterised in that

Described roller tension system has stretching screw (500,600), described stretching screw (500,600) it is positioned at center relative to the rotation axis of described donor rollers and there is threaded portion (520,620) and head (510,610), described head (510,610) wider relative to described threaded portion

Structure gap (530,630) in described stretching screw, described gap (530,630) are opened wide towards described rostral and have for guiding the non-circular of tensioning tool to carry profile secretly.

2. feedway as claimed in claim 1, it is characterised in that described gap (530,630) are configured to internal hexagon gap.

3. feedway as claimed in claim 1 or 2, it is characterised in that described gap (530,630) are configured to the through gap axially through described stretching screw.

4. the feedway as described in precedent claims, it is characterized in that, described stretching screw (500,600) it is configured to flat head dummy stretching screw, wherein said head (510,610) height (H) is less than the diameter of described threaded portion, the 50% of the diameter being highly preferable less than described threaded portion of described head.

5. the feedway as described in precedent claims, it is characterised in that the diameter of the described head (510) of described stretching screw (500) is at least the twice of the size of the diameter of described threaded portion (520).

6. the feedway as described in precedent claims, it is characterized in that, the inner side towards described threaded portion (512) of the described head of described stretching screw arranges radially-inwardly gap (513) to described threaded portion prominent on the inner side of annular bearing (514) or neighboring from described head to multiple bearing areas that described threaded portion is prominent and the most spaced apart that be formed at.

7. the feedway as described in precedent claims, it is characterized in that separator (700,1000,1100), it is arranged between described head (610) and the side towards described head of described donor rollers of described stretching screw (600) by part (710) at least one under the installment state of described donor rollers.

8. feedway as claimed in claim 7, it is characterized in that, described separator (700,1000,1100) have for guiding the port (725) by described threaded portion, wherein said port is transitioned in radially continuous transverse opening (727) on a side, the span width (728) of described transverse opening (727) overall diameter more than described threaded portion (620) and the maximum gauge less than described head (610).

9. feedway as claimed in claim 7 or 8, it is characterized in that, at described separator (700,1100) on the inner side towards described donor rollers, radially-inwardly gap (713 are set, 1113), make on the inner side of prominent annular bearing (714) or neighboring from described separator to multiple bearing areas (1114-1,1114-2,1114-3) that described threaded portion is prominent and the most spaced apart that be formed at.

10. the feedway as described in claim 7 to 9, it is characterized in that, described supply axle has axle ring (302) and the side associate member (304) that is contiguous to described axle ring (302) so that donor rollers (400) is closed in inserting, and described donor rollers has central through hole (406), the interior diameter of described central through hole (406) is more than the overall diameter of described associate member, and the overall diameter of described head (610) is less than the interior diameter of described through hole (406).

The feedway as described in one in 11. such as claim 7 to 10, it is characterized in that, described separator (700,1100) there is circle or circular-arc-shaped exterior contour, or described separator (1000) has the outer contour shape of stray circle arc shape, polygonal shape in particular, preferably triangle, square or hexagonal shape, it is therefore preferred to have cavetto corner.

12. feedwaies as described in precedent claims, it is characterized in that, described supply axle (300) has axle ring (302), described axle ring (302) has side loading end to carry described donor rollers (400), be attached at least one of described axle ring and carry bolt (320) secretly, described at least one carry bolt (320) secretly and protrude past described loading end and be sized to be incorporated into the carrying secretly in hole (402) of described donor rollers.

null13. feedwaies as claimed in claim 12，It is characterized in that play compensation device (360)，Described play compensation device (360) by support described stretching screw be activatable make support described stretching screw time described carry secretly bolt and described carry secretly between hole exist any play be eliminated，Described play compensation device (360) preferably has play compensating element, (362)，Described play compensating element, (362) be arranged in described in carry bolt (320) secretly upper and the most expansible by acting on axial force thereon，And described play compensation device be sized so that under the relaxation state of described play compensation device in the case of described donor rollers (400) is carried on described axle ring，The actuation part of described play compensation device protrudes past the described supply roll surface side (414) from described axle ring.

14. feedwaies as described in precedent claims, it is characterized in that, described supply axle (300) has axle ring (302), described axle ring (302) has side loading end to carry described donor rollers (400), and the flat gap (313) arranged on the outside of described donor rollers described axle ring (302) makes to be formed at the outside of described axle ring for the annular support surface of described donor rollers.

15. 1 kinds, for being manufactured the forming machine (100) of profiled part in particular by line or pipe by slender piece (115), have:

Shaped device (120), it has one or more shaping jig；With

Feedway (110), it for being supplied to the region of described shaped device (120) by slender piece from material stock device；

It is characterized in that

Described feedway (110) constructs according in precedent claims.