CN101687241B - Metallic pipe bending apparatus, and method for manufacturing a metallic pipe having a bent portion - Google Patents
Metallic pipe bending apparatus, and method for manufacturing a metallic pipe having a bent portion Download PDFInfo
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- CN101687241B CN101687241B CN200880023213.9A CN200880023213A CN101687241B CN 101687241 B CN101687241 B CN 101687241B CN 200880023213 A CN200880023213 A CN 200880023213A CN 101687241 B CN101687241 B CN 101687241B
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- metal tube
- fulcrum
- clamping limb
- metallic pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
- B21D7/025—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member and pulling or pushing the ends of the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/162—Heating equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Provided is a metallic pipe bending apparatus comprising heating means for heating a working object or a metallic pipe partially into an annular shape, propelling means for propelling the metallic pipe toward the heating means, guide means including a clamp arm capable of gripping the metallic pipe and rotating on an axis of rotation, for gripping the front portion of that portion of the metallic pipe, which is heated by the heating means, by the clamp arm and for turning the gripped point on the axis of rotation as the metallic pipe is propelled by the propelling means, thereby to apply a bending moment to the metallic pipe, and compression means for applying a returning force or a force directed oppositely of the propelling direction of the metallic pipe by the propelling means, to the metallic pipe on the axis of rotation through the clamp arm, thereby to apply a compression force to the metallic pipe. The compression means is arranged so that the distance between the applied point of the returning force and the axis of rotation may be larger than the distance between the gripped point of the metallic pipe by the clamp arm and the axis of rotation. The thickness reduction can be further reduced without inviting the increase in the compression driving force in the compression bending treatment of the metallic pipe.
Description
Technical field
The present invention relates to the bender of metal tube and possess the production method of metal pipe of bent portion, relate in particular to the technology of in the minimizing of the wall thickness that prevents metal tube, carrying out bending machining.
Background technology
In the industry facility in complete set of equipments or factory, power plant etc. as the conduit of fluids such as transfer oil or the various liquid of gas, perhaps the skeleton construction material of civil construction thing such as bridge or roof, stadium, extensive use metal tube at present.These metal tubes use standardization and are pre-formed pipe as the regulation shape (straight tube or special pipe (elbow', bend pipe first-class)); In addition; According to the construction object also be widely used to the pipe of linearity carried out bending machining pipe (below; Be referred to as bend pipe) because this bend pipe can be flexibly to tackling the requirement of various curvature, pipeline shape.
On the other hand, in the occasion of making bend pipe, if just will carry out bending simply as raw-material straight tube, the then thickness of pipe of the outer circumferential side of bent tube section (wall thickness) attenuation probably can not be satisfied the required intensity of this pipe, specification.So; The various schemes of relevant so-called bending compression have been proposed; For example be not only that straight tube is carried out bending simply (for example with reference to patent documentation 1: special public clear 54-28156 communique); And when tube axial direction applies compression stress, carrying out bending machining, thereby the minimizing that can prevent this wall thickness is (for example with reference to patent documentation 2: special fair 2-47287 communique).
Yet, in recent years, in the pipe arrangement of various complete set of equipments such as oil or gas, chemistry, generating, following tendency is arranged, that is,, suppress caliber (external diameter) in order to be embodied as the whole densification of complete equipment and the reduction of cost as far as possible, the quickening flow velocity carries out high-pressure delivery.Therefore, can bear the high-strength material of high pipe internal pressure for using, and after accomplishing bending machining the thickness of pipe can also keep with the wall thickness identical (minimizing of wall thickness is near zero) of former pipe require increasingly high.
On the one hand, the radius of curvature of bend pipe is from the easy property consideration of construction, great majority require with standardized market on the elbow' equidimension of selling identical.But because the radius of curvature of these elbow's is generally less, the wall thickness reduction of the pipe periphery during the more little bending machining of radius of curvature is big more, and the minimizing that therefore in fact is difficult to satisfy the bend pipe wall thickness is near zero requirement.And, along with improvement of Manufacturing Technology, can carry out the manufacturing of straight tube with value near the minimum of a value of manufacturing tolerance as the raw-material straight tube of bend pipe, when bending machining,, probably just can not guarantee the wall thickness that this pipe is required as long as wall thickness reduces a little.
On the other hand, adopt above-mentioned bending compression for the minimizing that prevents wall thickness, then might suppress the minimizing of wall thickness if increase the compression stress that applies to tube axial direction this moment.Yet; If will increase this compression stress; Then cause the power output of compressible drive portion to increase and support the maximization of its mechanism, and then cause the whole maximization of bender, therefore present situation is just to strengthen compression stress to be difficult to fully satisfy above-mentioned requirements.Give an example; (bending radius: the occasion of bending machining is carried out in path bending 478mm) with 1.5DR at the steel pipe with 12B/sch80 (wall thickness 17.4mm); In the bending machining that applies general compression stress; It is 12.5% that the propulsive force of steel pipe is approximately 60 tons and wall thickness slip, but if will make the wall thickness slip become 0%, then needs the propulsive force more than about 180 tons (about 3 times).
Summary of the invention
Thereby, the objective of the invention is to, under the situation of the increase of the compressible drive power in the bending compression processing that does not cause metal tube, further reduce the wall thickness reduction.
Achieve the goal in order to address the above problem, the bender of metal tube of the present invention possesses: heating arrangements, heat with ring-type the part as the metal tube of bending machining object; Propulsive mechanism makes above-mentioned metal tube advance to tube axial direction towards this heating arrangements; Guide; Being included in when controlling above-mentioned metal tube can be the clamping limb that rotate at the center with the fulcrum; The propelling that in the place ahead part of the heating part of the metal tube that utilizes this clamping limb to control to utilize above-mentioned heating arrangements, makes this gripping point be accompanied by the metal tube that utilizes above-mentioned propulsive mechanism is the center rotation with above-mentioned fulcrum, thus above-mentioned metal tube is applied moment of flexure; And compressing mechanism; To be back edge with the rightabout power of the direction of propulsion of the metal tube that utilizes above-mentioned propulsive mechanism be fulcrum and be applied on the above-mentioned metal tube through above-mentioned clamping limb with above-mentioned fulcrum; Thereby make compression force in this metal tube, the above-mentioned compressor structure is configured to application point and above-mentioned fulcrum big with the distance of the gripping point of the metal tube of above-mentioned clamping limb and above-mentioned fulcrum apart from Billy of above-mentioned back edge.
In bender of the present invention, utilizing above-mentioned heating arrangements metal tube to be advanced in the ring-type heating part of metal tube, utilize the guide channeling conduct simultaneously so that passed through the metal tube of heating arrangements and describe arcuation and carry out bending.Specifically; The occasion that direction of propulsion with metal tube is made as " the place ahead " (in this application; Direction of propulsion towards metal tube is made as " preceding " with phase the other side, will the rear opposite with it be made as " back " and describes), utilize clamping limb to control the place ahead part of heating part.It can be that rotate at the center with the fulcrum that this clamping limb is arranged to; And be accompanied by the propelling of the metal tube that utilizes above-mentioned propulsive mechanism and rotate; Above-mentioned thereupon grip portion is center rotation with this fulcrum and the above-mentioned heating part of metal tube applied moment of flexure, can make metal tube plastic deformation and to describe the mode bending metals pipe of circular arc continuously thus.
On the other hand, also apply compression stress, thereby prevent to manage the minimizing of the wall thickness of outer circumferential side to tube axial direction except applying above-mentioned moment of flexure.This compression stress be through will to the pipe the rightabout power of direction of propulsion be back edge; With above-mentioned fulcrum is that fulcrum and be applied on the metal tube through clamping limb produces, and makes from the position that applies this back edge the big with the distance of the gripping point of the metal tube of clamping limb and fulcrum apart from Billy of fulcrum in the present invention.Thus, compared with prior art on metal tube, produce big compression stress with little back edge, thus the wall thickness reduction can reduce bending machining the time.
If will accomplish above-mentioned " making from the position that applies this back edge the big with the distance of the gripping point of the metal tube of clamping limb and fulcrum of fulcrum " apart from Billy; For example; Observe from the fulcrum side and to dispose the above-mentioned compressor structure Billy in the outer part with the heating part of the metal tube of heating arrangements (that is the gripping point of the metal tube that utilizes clamping limb under the preceding original state of processing) and get final product.
As the concrete structure of compressing mechanism, for example, comprise with lower component getting final product: the pinion that is fixed on the clamping limb and rotates with this clamping limb; Tooth bar with this pinion; And the driven of above-mentioned tooth bar of the rotation that is accompanied by clamping limb and pinion braked, thereby produce the arrestment mechanism of above-mentioned compression stress.
In addition, in the present invention, the structure of compressing mechanism is not limited to the aforesaid mechanism that utilizes pinion and tooth bar, for example can adopt various drivings, the transmission mechanism of metal wire or gear, cylinder and so on.For propulsive mechanism, so long as the mechanism that metal tube is advanced, then not special restriction.
And; In the bender of the invention described above; Also can possess movable base, this movable base has the rear portion of controlling metal tube and this metal tube is transmitted the rear portion clamping device of propulsive force, but also can advance to above-mentioned heating arrangements; Above-mentioned propulsive mechanism comprises the propelling driving mechanism; This advances driving mechanism one of which end to cooperate with above-mentioned movable base and the other end cooperates with above-mentioned fulcrum, and through shortening or extend and make the metal tube propelling by means of above-mentioned movable base, the above-mentioned compressor structure comprises compressible drive mechanism; This compressible drive mechanism one of which end cooperates with above-mentioned movable base and the other end cooperates with above-mentioned fulcrum, and through shortening or extending above-mentioned metal tube is applied compression stress.
In this device construction, control the rear portion of metal tube through utilizing above-mentioned rear portion clamping device, and the movable base that utilizes above-mentioned propelling driving mechanism to make to be provided with this rear portion clamping device advances, thereby metal tube is advanced.Advance driving mechanism one end to cooperate with movable base; And the other end cooperates with above-mentioned fulcrum; And through shortening (for example dwindling the distance (movable base or fulcrum are furthered) between movable base and the fulcrum) or elongation (for example movable base being released from the rear forwards advances it); Make movable base and fulcrum relatively near, thereby movable base is advanced relatively make metal tube to advance with respect to fulcrum thus.
In addition; Same with above-mentioned compressible drive mechanism; One end cooperates with movable base; And the other end cooperates with above-mentioned fulcrum, and through shortening (for example dwindling the distance (movable base or fulcrum are furthered) between movable base and the fulcrum) or elongation (for example movable base being released from the rear forwards advances it), produces above-mentioned back edge and produce compression stress at metal tube.
And; In having this device construction of movable base; If observe Billy from the fulcrum side as stated and dispose compressing mechanism (compressible drive mechanism) in the outer part with the gripping point of the metal tube of clamping limb; Then metal tube propulsive mechanism that advances and the compressing mechanism that applies compression stress are linked each other by means of movable base across metal tube as processing object; Therefore as seesaw, be configured to poised state, make the reaction force and the counterforce counteraction that prevents the compression stress that wall thickness reduces of the propulsive force that metal tube advances, all depend on the outside device construction of device relatively with support with these reaction forces; This support structure simple just can, can make the miniaturization that becomes of device integral body.And, to this point, based on Figure 1A～Fig. 2 after explain in more detail.
In addition; With regard to the production method of metal pipe that possesses bent portion of the present invention; When the part to metal tube heats with ring-type; This heating part is applied moment of flexure and to the compression stress of tube axial direction, thereby make at least a portion of this metal tube carry out plastic deformation, position and can be when the clamping limb that rotates at the center is controlled this metal tube nearby with the fulcrum spaced apart from this gripping point in heating part that metal tube is controlled in utilization with case of bending; This metal tube is advanced to tube axial direction; Thereby make the gripping point rotation and the channeling conduct that utilize above-mentioned clamping limb carry out bending, on the other hand, separating the position of Billy from above-mentioned fulcrum with the big distance of the distance of the gripping point of the metal tube of above-mentioned clamping limb and above-mentioned fulcrum so that at least a portion of metal tube is described arcuation; With above-mentioned fulcrum be fulcrum and by means of above-mentioned clamping limb to metal tube apply to the rightabout back edge of the direction of propulsion of metal tube, thereby give compression stress to metal tube.
According to this manufacturing approach of the present invention, same with the bender of the invention described above, compared with prior art can on metal tube, produce big compression stress with little power (back edge), thus the minimizing of the wall thickness can suppress bending machining the time.
In manufacturing approach of the present invention; Concrete mode as said method; Observe and to apply back edge Billy in the outer part with the heating part of the metal tube of heating arrangements (that is the gripping point of the metal tube that utilizes clamping limb under the preceding original state of processing) from the fulcrum side.
And; In said method; Also can control the rear portion of metal tube and when the movable base that can advance to the heating location of metal tube controls the rear portion of metal tube in utilization; Utilize an end to cooperate and the other end cooperates with above-mentioned fulcrum and the driving mechanism that can shorten or extend makes the metal tube propelling, utilize an end to cooperate simultaneously and the other end cooperates the driving mechanism that also can shorten or extend that metal tube is applied compression stress with above-mentioned fulcrum with above-mentioned movable base with this movable base.
In the present invention, as the material of the metal tube of processing object and size (external diameter, internal diameter, wall thickness dimension) is not special limits.For example, though the present invention can be with the pipe that is made up of the material that with iron is main body (for example steel pipe or stainless steel tube, special steel pipe etc.) as processing object, also can be the pipe that is the main body with other metal materials or be the pipe of material with other metal alloys.And in the present invention, the part (bent portion) of carrying out bending machining both can be the part of this pipe total length, also can be whole.
According to the present invention, can under the situation of the increase of the compressible drive power in the bending compression processing that does not cause metal tube, further reduce the wall thickness reduction
Description of drawings
Figure 1A is the concept map that expression relates to the device construction (processing beginning before original state) of embodiment of the present invention.
Figure 1B is the concept map that expression relates to the device construction (state in the processing) of embodiment of the present invention.
Fig. 2 is the concept map of the action (having begun to pass through the state of time t from processing) in the explanation said apparatus structure.
Fig. 3 A is the figure that expression relates to the bender (processing beginning before original state) of the first embodiment of the present invention.
Fig. 3 B is the figure that expression relates to the bender (state in the processing) of above-mentioned first embodiment.
Fig. 4 is the figure that expression relates to the bender of the second embodiment of the present invention.
Fig. 5 is the figure that expression relates to the bender of the third embodiment of the present invention.
The specific embodiment
Below, based on description of drawings embodiment of the present invention and embodiment, at first explanation relates to the principle of the device of embodiment, and the structure example of more specific device is described as embodiment then.And in each accompanying drawing, identical Reference numeral is represented identical or suitable part.
[principle of device]
Figure 1A and Figure 1B are the concept maps that expression relates to the device construction of embodiment of the present invention, and Fig. 2 is the figure of the action of this device of expression.As shown in Figure 1, the device of this embodiment possesses: the metal tube 1 to as the bending machining object reaches the power supply unit 12 to this heater coil power supply with the heater coil 11 that ring-type heats; Having the clamping part 22 of controlling metal tube 1 and be arranged in the anterior position of heater coil 11 to be the clamping limb 21 that rotate at the center with the fulcrum A that is arranged at apart from the position of this coil 11 certain distance R1; The movable base (being designated hereinafter simply as base) 51 that has the clamping part 52 at the rear portion of controlling metal tube 1 and be arranged to advance to heater coil 11; The propelling drive division (propelling driving mechanism) 31 that this base 51 is advanced to fulcrum A; Metal tube 1 is applied the compressible drive portion 41 of compression stress; And link with clamping limb 21 and be the guided rings 42 of center rotation with it with fulcrum A.
Fulcrum A fixes (for example being fixed on building construction body or the base plate) so that it is inactive; Above-mentioned propelling drive division 31 cooperates with this fulcrum A and base 51; And through closely base 51 being advanced to fulcrum A layback base 51, fixing thus (controlling) metal tube 1 on base 51 forwards advances towards heater coil 11.And because the leading section of metal tube 1 utilizes clamping part 22 fixing (controlling) on clamping limb 21, so clamping limb 21 is along with the preceding of metal tube 1 and then rotation, and the gripping point of metal tube 1 is the center rotation with fulcrum A.Like this; Metal tube 1 is held arm 21 guiding; Utilize the heating part of the metal tube 1 of heater coil 11 to produce plastic deformation continuously and bending, it is the circular shape (with reference to Figure 1B) of radius with utilizing the distance R 1 of the gripping point (clamping part 22) of clamping limb 21 that metal tube 1 bends to fulcrum A.
And, meanwhile, utilize 41 pairs of metal tubes 1 of compressible drive portion to apply compression stress.Specifically, compressible drive portion 41 1 ends cooperate with base 51, and the periphery of the other end and guided rings 42 (some B) cooperates, and drive so that both 51, B furthers and shortens between the two.Guided rings 42 is rotated along with the rotation of the clamping limb 21 of the propelling that utilizes above-mentioned metal tube 1; Compressible drive portion 41 is reeled with the binding parts 45 (for example chain or metal wire, tooth bar, bar etc./concrete structure is narrated in the back) of guided rings 42 or (direction of propulsion of metal tube 1) propelling forwards, and compressible drive portion 41 produces the power (back edge or brake force) that overcomes this coiling or propelling.This back edge by means of guided rings 42 and clamping limb 21 as to the compression force of tube axial direction in metal tube 1, thereby the wall thickness of killer tube outer peripheral portion reduces.
In addition; In the said apparatus structure; The compressible drive portion 41 that produces back edge is configured in from fulcrum A side observes in the outer part than metal tube 1, from as the fulcrum A of fulcrum to the distance R 2 of application point (force) B of back edge than big to distance R 1 as the gripping point (clamping part 22) of the metal tube that utilizes clamping limb 21 1 of the application point of compression stress from fulcrum A.Thereby,, utilize little back edge also can apply big compression stress to metal tube 1 according to being the lever principle of fulcrum with fulcrum A.And, as the characteristic of this device construction, we can say following characteristic.
[device action]
Drive propelling drive division 31 and compressible drive portion 41 and begin to carry out bending machining, then base 51 advances to fulcrum A side as stated, and this pace is made as V
1And, through advancing of this base 51, utilize point (hot spot) P of heater coil 11 heating also to advance, and through clamping limb 21 rotations, this hot spot P is center rotation (with reference to Figure 1B) with fulcrum A.In addition, heater coil 11 does not move, and the tube portion (hot spot) that utilizes heater coil 11 heating for example utilizes cooling agent quench cooled such as water or compressed air and carries out plastic working successively continuously just after flexural deformation.Fig. 2 is that expression begins to have passed through time t from processing
1The time device each point (the application point B of fulcrum A, hot spot P, back edge and base X
0) the figure along the displacement of tube axial direction.As shown in the drawing, base 51 is from initial position X
0Only move V to fulcrum A
1T
1
And, will be made as v along with the speed of the preceding of this base 51 and then the hot spot that advances P, then this pace v can represent that this pace v becomes process velocity in the compression ratio of metal tube 1 with following formula during for β.
V=V
1(1-β) ... (formula 1)
And, meanwhile, also advance this pace V with respect to points of engagement (application point of the back edge) B of the compressible drive portion 41 of guided rings 42
2Utilize compressible drive portion shown in following formula, to control.
V
2=V
1(1-β) R2/R1... (formula 2)
Derive following formula 3 from above-mentioned formula 1 and formula 2, the displacement that relates to premises A, P and the B of the rotation of clamping limb 21 reaches balance.And, in Figure 1B and Fig. 2, with each point X
1, P and B displacement after (t=t
1) point use X respectively
1, P
1And B
1Expression.Fulcrum A is fixing and do not have a displacement.In addition, B-B
1And P-P
1In fact become circular-arcly, and in Fig. 2, represent with straight line.
V
2/ v=R2/R1... (formula 3)
In above-mentioned action, utilize by advancing drive division 31 pairs of somes A (fulcrum) to bring the tension force F1 of reaction force, base 51 is with speed V
1Forward drive (with reference to Figure 1A); Thereupon; The thrust F1 identical with tension force F1 is applied to the rear portion of metal tube 1, and utilizes the tension force F2 of the reaction force that is brought by 41 pairs of bases 51 of compressible drive portion, and back edge (brake force) F2 is applied to the periphery (leading section of clamping limb 21) of guided rings 42.Above-mentioned thrust F1 not only intervenes the static balance with back edge F2, but also intervene with the resistance to compression fp of flexural deformation resistance fb that comprises metal tube 1 as load and metal tube 1 and be accompanied by each key element that constitutes this processing unit (plant) mobile kinetic force of friction f μ metal tube with speed V
1The dynamic equilibrium of forward motion.And resistance to compression fp and compression stress Fp reach balance among these loads on dynamically.
At this, above-mentioned flexural deformation resistance fb and resistance to compression fp are power necessary on processing purpose.And, also can be described as the power that is difficult to become the main cause that upsets processing action.This is because act on metal tube 1 coaxially, and deformation drag is according to the temperature stable value of free burial ground for the destitute decision roughly.To this; The above-mentioned kinetic force of friction f μ that moves that is accompanied by the device key element acts on metal tube 1 on disalignment; And dry friction or boundary friction become main flow and follow the change often with irregular amplitude under like the situation of the low speed of bending machining and so on action, therefore upset processing action easily.But, in this device construction and since above-mentioned out-of-alignment power across metal tube 1 with the mode effect as seesaw, so major part is eliminated (even incomplete elimination also can reduce a lot of amounts), thereby has the advantage that the interference to processing action is attenuated.
And this device construction disposes propelling drive division 31 and compressible drive portion 41 across metal tube 1 with the such mode of seesaw as stated, utilizes base 51 and clamping limb 21 to act on propulsive force and compression stress across metal tube 1.So-called exactly " closing structure " do not need fixing point (basis) except a fixed pivot axis A, have advantage aspect small-sized in that device integral body is become yet.Below, the example of apparatus structure more specifically of the present invention is described.
[embodiment 1]
Fig. 3 A and Fig. 3 B are the figure that expression relates to the bender of the first embodiment of the present invention.Shown in these figure, this bender possesses: heating is as the heater coil 11 of the metal tube 1 of processing object; Power supply unit 12 to this heater coil supply high frequency electric current; Control the clamping limb 21 that the leading section of metal tube 1 is rotated; Control the base 51 that advances to heater coil 11 in the rear portion of metal tube 1; The propelling drive division 31 that base 51 is advanced; Metal tube 1 is applied the compressible drive portion 41 of compression stress; And be fixed on that fulcrum A goes up and pedestal 10 that base for supporting 51 can advance it to fulcrum A.
Clamping limb 21 possesses the anterior clamping part 22 of the current anterior position of the heating part of controlling the metal tube 1 that utilizes heater coil 11, and to be arranged to be that rotate at the center with fulcrum A.Heater coil 11 through from power supply unit 12 supply high frequency electric currents metal tube 1 being carried out eddy-current heating, but is not limited to load coil in this example, for example also can use other heating arrangements like gas burner and so on.
In addition, in this example,, also can possess this cylinder more than or three though advance base 51 by two cylinders 32.And, as above-mentioned anterior clamping part 22 and rear portion clamping part 52,,, also can adopt other any chuck and even clamping devices so long as can control the mechanism of metal tube 1 though can use collet.
On the other hand, compressible drive portion 41 can be made up of the cylinder (for example hydraulic cylinder) 43 that is fixed on the base 51, and the front end of the piston rod 44 that is possessed at this cylinder 43 is provided with tooth bar 45, the tooth that meshes at periphery setting and this tooth bar 45 of guided rings 42.Guided rings 42 is made up of the pinion that possesses in its periphery with the tooth of tooth bar 45 engagement as stated, and is fixed on the clamping limb 21 so that be that rotate at the center with above-mentioned clamping limb 21 with fulcrum A.Thereby; If metal tube 1 advances; Then clamping limb 21 rotations; Guided rings 42 rotation and make tooth bar 45 forwards (to the direction identical) advance (with reference to Fig. 3 B) together therewith with metal tube 1, and utilize the above-mentioned cylinder 43 that constitutes compressible drive portion 41 to make back edge act on this tooth bar 45 to the direction opposite with advancing of this tooth bar 45.Thus, can apply compression stress to tube axial direction by means of pinion (guided rings) 42, clamping limb 21 and 22 pairs of metal tubes of anterior clamping part 1.
In the present embodiment based on the present invention; Through disposing above-mentioned compressible drive portion 41 at the opposition side of fulcrum A across metal tube 1 (processing before metal tube part); Thereby the distance R 2 that makes from fulcrum A to compressible drive portion 41 (as the tooth bar 45 of the application point of back edge and the engaging piece of pinion 42) than the distance of 1 the handle part (anterior clamping part 22) from fulcrum A to metal tube (perhaps; Fulcrum A with utilize the distance of the heating part of heater coil 11) R1 is big, the wall thickness in the time of can applying compression stress effectively and can suppress bending machining metal tube 1 with little back edge reduces.
[embodiment 2]
Fig. 4 is the figure of the bender of the expression second embodiment of the present invention.As shown in the drawing; This bender and above-mentioned first embodiment are same; The heater coil 11, power supply unit 12, clamping limb 21, base 51, propelling drive division 31 (propelling), compressible drive portion 41 (compression is with cylinder 43, piston rod 44 and tooth bar 45), guided rings (pinion) 42, fulcrum A and the pedestal 10 that possess heating metal pipe 1 with cylinder 32 and piston rod 33; But it is different with above-mentioned first embodiment; The cylinder 32 that advances drive division 31 is fixed on the base 51, and will advances the leading section of the piston rod 33 of drive division 31 to be fixed on the fulcrum A, and base 51 is advanced near fulcrum A through in advancing, drawing in piston rod 33 with cylinder 32.
In addition; Direction of propulsion with respect to metal tube 1 disposes fulcrum A and advances drive division 31 in a side across metal tube 1; In opposite side configuration compressible drive portion 41; Thereby same with above-mentioned first embodiment, the distance R 2 that makes from fulcrum A to compressible drive portion 41 (as the tooth bar 45 of the application point of back edge and the engaging piece of pinion 42) is bigger than the distance R 1 of 1 the handle part (anterior clamping part 22) from fulcrum A to metal tube.And other structures are identical with above-mentioned first embodiment, therefore marked identical Reference numeral in the accompanying drawings and omitted repeat specification (also identical in the 3rd embodiment).
[embodiment 3]
Fig. 5 is the figure that expression relates to the bender of the third embodiment of the present invention.As shown in the drawing; This bender and above-mentioned first embodiment are same; Possess heater coil 11, power supply unit 12, clamping limb 21, base 51, propelling drive division 31 (propelling), compressible drive portion 41 (compression is with cylinder 43, piston rod 44 and tooth bar 45), guided rings (pinion) 42, fulcrum A and pedestal 10 with cylinder 32 and piston rod 33; But it is different with above-mentioned first embodiment; With the heating part (or gripping point of the metal tube that utilizes clamping limb 21 1 in the original state (during the processing beginning)) of the metal tube 1 that utilizes heater coil 11 occasion, in the side configuration compressible drive portion 41 identical with fulcrum A as benchmark.
This compressible drive portion 41 and above-mentioned first embodiment are same, have compression and possess the piston rod 44 of tooth bar 45 with cylinder 43 with at front end, but compression is not fixed on pedestal 10 and the fulcrum A with cylinder 43, but for example be fixed on the base plate by means of fixed hinge 46.Tooth bar 45 is with being the center with fulcrum A and 42 engagements of the pinion (guided rings) of clamping limb 21 rotations; The propelling that is accompanied by metal tube 1 (base 51) is rearward retreated; And compression with cylinder 43 generations to the power (back edge/brake force) of direction (the place ahead) in contrast, apply compression stress by means of tooth bar 45, pinion 42 and 21 pairs of metal tubes of clamping limb 1 to tube axial direction thus.
And; In this embodiment; The distance R 2 of also making from fulcrum A to compressible drive portion 41 (as the tooth bar 45 of the application point of back edge and the engaging piece of pinion 42) is bigger than distance (perhaps, fulcrum A and the distance of utilizing the heating part of the heater coil 11) R1 of 1 the handle part (anterior clamping part 22) from fulcrum A to metal tube
More than embodiment of the present invention and embodiment are illustrated, but the present invention is not limited to these, those skilled in the art should be understood that in the scope of technical scheme record can carry out various changes.
For example, in the above-described embodiments,, also can use the chain and sprocket tooth, perhaps metal wire and winding drum, perhaps other Poewr transmission mechanisms though used rack-and-pinion as the mechanism's (compressible drive portion, guided rings) that metal tube is applied compression stress.And with regard to the clamping device of controlling metal tube, as long as can bear the moment of flexure that is applied on the metal tube, and axial force (thrust of length of tube direction) that can the subtend tube axial direction produces and slides, and then can be the various mechanisms beyond above-mentioned.In addition, for other advance drive division and clamping limb, movable base etc., except example shown in the drawings, can also use various mechanisms structure.
Description of reference numerals
The A-fulcrum, 1-metal tube (bending machining object), 10-base, 11-heater coil, 12-power supply unit; The 21-clamping limb, the anterior clamping part of 22-, 31-advances drive division, and 32-advances and uses cylinder; 33,44-piston rod, 41-compressible drive portion, 42-guided rings (pinion), cylinder is used in the 43-compression; The 45-tooth bar, 46-fixed hinge, 51-movable base, 52-rear portion clamping part.
Claims (2)
1. the bender of a metal tube possesses:
Heating arrangements heats with ring-type the part as the metal tube of bending machining object;
Propulsive mechanism makes above-mentioned metal tube advance to tube axial direction towards this heating arrangements;
Guide; Being included in when controlling above-mentioned metal tube can be the clamping limb that rotate at the center with the fulcrum; When utilizing this clamping limb to control the place ahead part by the heating part of the metal tube of above-mentioned heating arrangements heating; The propelling that makes this gripping point be accompanied by the metal tube that utilizes above-mentioned propulsive mechanism is the center rotation with above-mentioned fulcrum, thus above-mentioned metal tube is applied moment of flexure;
Compressing mechanism will be a back edge with the rightabout power of the direction of propulsion of the metal tube that utilizes above-mentioned propulsive mechanism to be fulcrum and to be applied on the above-mentioned metal tube through above-mentioned clamping limb with above-mentioned fulcrum, thereby makes compression force in this metal tube; And
Have the rear portion of controlling metal tube and this metal tube transmitted the rear portion clamping device of propulsive force and the movable base that can advance to above-mentioned heating arrangements,
Above-mentioned propulsive mechanism comprise constitute by hydraulic cylinder, an end cooperates with above-mentioned movable base and the other end cooperates with above-mentioned fulcrum, and through shortening or elongation comes the propelling driving mechanism that above-mentioned metal tube advanced via above-mentioned movable base,
The above-mentioned compressor structure comprises:
The guide ring that is fixed in above-mentioned clamping limb and rotates with this clamping limb;
The binding parts that are wound in this guide ring or forwards advance through this guide ring; And
Constitute by hydraulic cylinder, an end cooperates with above-mentioned movable base and the other end cooperates with above-mentioned binding parts, and through shortening or elongation comes above-mentioned metal tube is applied the compressible drive mechanism of compression stress,
The above-mentioned compressor structure is configured to application point and above-mentioned fulcrum big with the distance of the gripping point of the metal tube of above-mentioned clamping limb and above-mentioned fulcrum apart from Billy of above-mentioned back edge,
The bender of above-mentioned metal tube is characterised in that
Through disposing above-mentioned fulcrum and above-mentioned propelling driving mechanism in a side, thereby above-mentioned metal tube is advanced via above-mentioned movable base across above-mentioned metal tube,
On the other hand; Through disposing above-mentioned compressible drive mechanism at opposite side across above-mentioned metal tube; Position separate the distance bigger than the distance of the gripping point of above-mentioned metal tube and above-mentioned fulcrum from above-mentioned fulcrum is applied to above-mentioned back edge on the above-mentioned clamping limb via above-mentioned binding parts and above-mentioned guide ring.
2. production method of metal pipe that possesses bent portion; To the part of metal tube with the ring-type heating in, this heating part is applied moment of flexure and to the compression stress of tube axial direction, thereby makes at least a portion of this metal tube carry out plastic deformation with case of bending; It is characterized in that
The position and can be being that the clamping limb that rotate at the center is controlled this metal tube from this gripping point fulcrum spaced apart nearby in heating part that above-mentioned metal tube is controlled in utilization,
This metal tube is advanced to tube axial direction; Thereby make the gripping point rotation and the channeling conduct that utilize above-mentioned clamping limb carry out bending so that at least a portion of above-mentioned metal tube is described arcuation; And; The propelling of this metal tube is carried out as follows like this; When the rear portion through controlling metal tube and the movable base that can advance to the heating location of above-mentioned metal tube are controlled the rear portion of above-mentioned metal tube, through constitute by hydraulic cylinder, an end cooperates with above-mentioned movable base and the other end cooperates with above-mentioned fulcrum and shorten or the propelling driving mechanism that extends advances above-mentioned metal tube
When this metal tube advances; Through constitute by hydraulic cylinder, an end cooperates with above-mentioned movable base and the other end with link parts and cooperate and shorten or the compressible drive mechanism of extending comes above-mentioned metal tube is applied compression stress; Wherein, Above-mentioned binding parts are wound in and are fixed on the above-mentioned clamping limb and the perhaps propelling forwards through this guide ring on the guide ring that this clamping limb rotates, and, carry out so as follows to the giving of compression stress of this metal tube; Separating the position of Billy with the big distance of the distance of the gripping point of the metal tube of above-mentioned clamping limb and above-mentioned fulcrum from above-mentioned fulcrum; With above-mentioned fulcrum is fulcrum and through above-mentioned clamping limb, to above-mentioned metal tube apply to the rightabout back edge of the direction of propulsion of metal tube
Through disposing above-mentioned fulcrum and above-mentioned propelling driving mechanism in a side, thereby above-mentioned metal tube is advanced via above-mentioned movable base across above-mentioned metal tube,
On the other hand; Through disposing above-mentioned compressible drive mechanism at opposite side across above-mentioned metal tube; Position separate the distance bigger than the distance of the gripping point of above-mentioned metal tube and above-mentioned fulcrum from above-mentioned fulcrum is applied to above-mentioned back edge on the above-mentioned clamping limb via above-mentioned binding parts and above-mentioned guide ring.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007179001A JP2009012062A (en) | 2007-07-06 | 2007-07-06 | Bending device of metallic tube and method of manufacturing metallic tube with bent part |
| JP179001/2007 | 2007-07-06 | ||
| PCT/JP2008/061947 WO2009008295A1 (en) | 2007-07-06 | 2008-07-02 | Metallic pipe bending apparatus, and method for manufacturing a metallic pipe having a bent portion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101687241A CN101687241A (en) | 2010-03-31 |
| CN101687241B true CN101687241B (en) | 2012-12-19 |
Family
ID=40228473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880023213.9A Expired - Fee Related CN101687241B (en) | 2007-07-06 | 2008-07-02 | Metallic pipe bending apparatus, and method for manufacturing a metallic pipe having a bent portion |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2165780A4 (en) |
| JP (1) | JP2009012062A (en) |
| KR (1) | KR101443818B1 (en) |
| CN (1) | CN101687241B (en) |
| TW (1) | TWI439335B (en) |
| WO (1) | WO2009008295A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101092951B1 (en) * | 2009-06-19 | 2011-12-12 | 주식회사 성일에스아이엠 | Pipe bending apparatus with a back pressure cylinder |
| JP5517768B2 (en) * | 2010-06-17 | 2014-06-11 | 第一高周波工業株式会社 | Metal tube bending apparatus and method |
| JP5784378B2 (en) * | 2011-06-14 | 2015-09-24 | 第一高周波工業株式会社 | Metal pipe bending machine |
| JP5784387B2 (en) * | 2011-06-28 | 2015-09-24 | 第一高周波工業株式会社 | Metal pipe bending machine |
| KR101166207B1 (en) * | 2011-08-29 | 2012-07-16 | 주식회사 성일에스아이엠 | Back pressure control method in pipe bending |
| CN103358135B (en) * | 2012-04-05 | 2016-02-10 | 中国石油天然气集团公司 | Heavy caliber hot-bending bends retaining wall on slope dedicated |
| CN102641924B (en) * | 2012-05-10 | 2014-04-09 | 西安向阳航天材料股份有限公司 | Manufacturing device and method for bimetal composite hot bend |
| JP2014065072A (en) * | 2012-09-27 | 2014-04-17 | Dai Ichi High Frequency Co Ltd | Processing device for bending metal tube and method of manufacturing metal tube with bent part |
| CN104438495A (en) * | 2013-09-24 | 2015-03-25 | 中石化胜利油建工程有限公司 | One-step method hot-bending bend device and process |
| CN105170736B (en) * | 2015-10-12 | 2017-10-24 | 宁波运生工贸有限公司 | Semiautomatic pipe bending machine |
| CN105499344A (en) * | 2016-01-14 | 2016-04-20 | 张家港市台和机械制造有限公司 | Pressing wheel shaft structure in pipe bending machine |
| CN107571484A (en) * | 2017-09-23 | 2018-01-12 | 昊天节能装备有限责任公司 | The prefabricated direct-buried elbow of high density polyethylene (HDPE) seamless outer protection tube shaped device and its moulding process |
| CN112845897B (en) * | 2020-12-29 | 2021-11-02 | 哈尔滨工业大学 | Servo cantilever structure heating device |
| KR102367906B1 (en) * | 2021-06-28 | 2022-02-25 | 주식회사 알멕 | stretch forming apparatus for hollow metal products |
| CN114749533B (en) * | 2022-04-22 | 2024-03-19 | 浙江福兰特有限公司 | Internal expansion clamping mechanism of stainless steel pipe fitting pipe bending machine |
| CN117299891B (en) * | 2023-11-24 | 2024-02-06 | 河北鹏鑫管道装备集团有限公司 | Special-shaped bent pipe machining device and machining method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3899908A (en) * | 1974-09-12 | 1975-08-19 | Boris Stepanovich Somov | Device for bending pipes with simultaneous upsetting |
| CN2654241Y (en) * | 2003-09-15 | 2004-11-10 | 高文兴 | Medium frequency pushing shaped seamless steel bend pipe |
| CN1911550A (en) * | 2005-08-09 | 2007-02-14 | 十堰市风雷工贸有限公司 | Shaping method of small curvature radius bend pipe |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5186057A (en) | 1975-01-28 | 1976-07-28 | Daiichi Koshuha Honsha Kk | KINZOKUKANNOMAGEKAKOHOOYOBIDOSOCHI |
| JPS548154A (en) * | 1977-06-22 | 1979-01-22 | Daiichi Koshuha Kogyo Kk | Method and apparatus for compression bending of metal band material |
| JPS58927B2 (en) * | 1978-02-24 | 1983-01-08 | 第一高周波工業株式会社 | Bending method for austenitic stainless steel pipe |
| JPS6117329A (en) * | 1984-07-03 | 1986-01-25 | Mitsubishi Heavy Ind Ltd | Pipe bending method |
| JPH0247287B2 (en) | 1985-07-11 | 1990-10-19 | Daiichi Koshuha Kogyo Kk | KINZOKUKANNOATSUSHUKUMAGEHOHOOYOBISONOSOCHI |
| JP3739751B2 (en) * | 2003-01-20 | 2006-01-25 | 第一高周波工業株式会社 | Metal bending tube manufacturing method and bending apparatus |
| JP2006326667A (en) * | 2005-05-30 | 2006-12-07 | Dai Ichi High Frequency Co Ltd | Hot bending method for metal tube and device therefor |
-
2007
- 2007-07-06 JP JP2007179001A patent/JP2009012062A/en active Pending
-
2008
- 2008-07-02 WO PCT/JP2008/061947 patent/WO2009008295A1/en active Application Filing
- 2008-07-02 CN CN200880023213.9A patent/CN101687241B/en not_active Expired - Fee Related
- 2008-07-02 EP EP08790798A patent/EP2165780A4/en not_active Withdrawn
- 2008-07-02 KR KR1020107002556A patent/KR101443818B1/en active IP Right Grant
- 2008-07-03 TW TW97125077A patent/TWI439335B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3899908A (en) * | 1974-09-12 | 1975-08-19 | Boris Stepanovich Somov | Device for bending pipes with simultaneous upsetting |
| CN2654241Y (en) * | 2003-09-15 | 2004-11-10 | 高文兴 | Medium frequency pushing shaped seamless steel bend pipe |
| CN1911550A (en) * | 2005-08-09 | 2007-02-14 | 十堰市风雷工贸有限公司 | Shaping method of small curvature radius bend pipe |
Non-Patent Citations (4)
| Title |
|---|
| JP昭54-8154A 1979.01.22 |
| JP昭61-17329A 1986.01.25 |
| JP特开2004-223530A 2004.08.12 |
| JP特开2006-326667A 2006.12.07 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101687241A (en) | 2010-03-31 |
| EP2165780A1 (en) | 2010-03-24 |
| TWI439335B (en) | 2014-06-01 |
| KR101443818B1 (en) | 2014-09-23 |
| JP2009012062A (en) | 2009-01-22 |
| EP2165780A4 (en) | 2010-11-10 |
| WO2009008295A1 (en) | 2009-01-15 |
| KR20100045459A (en) | 2010-05-03 |
| TW200924870A (en) | 2009-06-16 |
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