CN105268810A - Hydraulic control type large-diameter T-branch pipe locking type rigid-plasticity combined bulging forming equipment - Google Patents

Hydraulic control type large-diameter T-branch pipe locking type rigid-plasticity combined bulging forming equipment Download PDF

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Publication number
CN105268810A
CN105268810A CN201510346915.2A CN201510346915A CN105268810A CN 105268810 A CN105268810 A CN 105268810A CN 201510346915 A CN201510346915 A CN 201510346915A CN 105268810 A CN105268810 A CN 105268810A
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China
Prior art keywords
bulging
push rod
hydraulic cylinder
cylinder
drift
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CN201510346915.2A
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Chinese (zh)
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刘胜利
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XINCHANG HANGDA MACHINERY MANUFACTURING Co Ltd
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XINCHANG HANGDA MACHINERY MANUFACTURING Co Ltd
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Priority to CN201510346915.2A priority Critical patent/CN105268810A/en
Publication of CN105268810A publication Critical patent/CN105268810A/en
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Abstract

The invention discloses hydraulic control type large-diameter T-branch pipe locking type rigid-plasticity combined bulging forming equipment. The hydraulic control type large-diameter T-branch pipe locking type rigid-plasticity combined bulging forming equipment comprises an upper half die and a lower half die. A forming cavity is arranged between the upper half die and the lower half die, and the two ends of the forming cavity are provided with bulging squeezing punches respectively. The lower half die is provided with a branch pipe forming cavity and a balance punch is installed in the branch pipe forming cavity. A rigid bulging inner die is arranged between the two bulging squeezing punches and comprises push rods located at the two ends respectively, and a forming inner die block matched with the branch pipe forming cavity and used for driving a pipe blank to bulge and deform is arranged between the two push rods; the forming inner die block is connected with the two push rods through double-hinge connecting rods; the axes of the push rods are parallel to the axis of the forming cavity, and the push rods are installed in the corresponding bulging squeezing punches respectively in a sliding matching mode; a bulging liquid inlet and a bulging liquid outlet are formed in each bulging squeezing punch; one of the push rods is provided with a locking type rapid detachment and connecting structure; compound hydraulic cylinders are arranged at the two ends of the forming cavity respectively; an auxiliary pressure mechanism is arranged between the two push rods.

Description

Hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former
Technical field
The invention belongs to tubing without Machining Technology for Cutting field, be specifically related to a kind of hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former.
Background technology
The kind of tube bulge is a lot, is mainly divided into rigidity bulging and soft mode bulging two class.Rigidity punch bulging is only applicable to the bulging processing of form and dimensional precision less demanding axial symmetry bulging part.When utilizing liquid, gas or elastomer to carry out bulging as transmission medium, be commonly referred to as soft mode bulging.Liquid usable oils, emulsion or water, elastomer adopts polyurethane rubber or natural rubber usually.Paraffin is easy in solid or liquid unique features owing to having, and recyclable recycling, also it can be used as bulging transmission medium, and achieve good technique effect aborning.Therefore, according to the difference of transmission medium, soft mode bulging can be divided into again hydraulic expanding-forming, barometric pressure load, rubber bulging and paraffin bulging etc.Soft mode bulging is compared with rigid mould bulging, is particularly suitable for various complex-shaped pipe fitting processing, has obvious technical economic benefit.
In three-way pipe bulging process, internal surface of bloom need act on very large bulging pressure.According to the production method of bulging pressure and the number of bulging drift and the difference of structure, the method for three-way pipe Plastic Forming can be divided into three kinds accordingly: liquid medium Extrusion bulging, plastic medium compound punch Extrusion bulging and plastic medium separate punches Extrusion bulging three kinds.
As shown in Figure 1, be the structural representation of existing a kind of three-way pipe liquid medium Extrusion bulging mould.This three-way pipe liquid medium Extrusion bulging mould is made up of two-half die, pipe is placed in one, inner liquid provides interior pressure by special pressure charging system, the motion of size and left and right two drifts of its force value has nothing to do, extruding force is provided by left and right drift, balance drift provides the equilibrant force of a tube end, by the coordinative role of these three power, can make pipe expansion forming under super-pressure hydrostatic pressure.The method due to bulging pressure field distribution the most uniform and stable, product quality formed thereby is best, but required bulging pressure is larger, need hundreds if not thousands of MPas, and Normal hydraulic pump can only produce the pressure of about 30MPa, therefore need pressure charging system be configured, also very high to the requirement of control technology, equipment is costly.In addition, liquid medium Extrusion bulging is shaped and can not be applied to as medium carbon steel, large scale heavy section casting etc. need heating to improve plasticity, to reduce the bulging processing of drag.
As shown in Figure 2, be the structural representation of existing a kind of plastic medium compound punch Extrusion bulging mould.The drift of this expanding die is a terraced structure, can exert pressure respectively to medium and tube wall two ends.During Extrusion bulging, first punch head enters in pipe and exerts pressure to plastic medium, makes the corresponding tube wall protuberance of arm die cavity produce bulging, when drift step contacts with pipe, produce extruding force, pipe produces plastic deformation under the acting in conjunction of interior pressure and extruding force, and arm is constantly increased.
This expansion forming method, except having that punch structure is simple, except equipment needed thereby and the advantage such as device is less, operation is convenient, also has the advantage that wall ratio is more uniform and stable, amplitude of variation is little of product.Because the size relationship extruding drift, die, pipe and bulging medium decides the initial pressure of bulging, therefore in forming process, the adjustment of bulging pressure is comparatively difficult, can only carry out within the specific limits, is mainly realized by the structure of extruding drift of asking permission to absent oneself briefly.Therefore, comparatively strict to the requirement of the aspects such as the size of pipe, material and mould, there is significant limitation in using.
As shown in Figure 3, be the structural representation of existing a kind of plastic medium separate punches Extrusion bulging mould.The interior pressure of this expanding die is produced by bulging drift Extrusion bulging medium, and its numerical value has nothing to do with extruding drift and determined by the motion of bulging drift.The mechanism of production of bulging pressure is shaped similar to plastic medium compound punch Extrusion bulging, and the difference of the two is mainly whether extruding drift and bulging drift are integrated.In plastic medium separate punches extrusion forming method, extruding drift and bulging drift are driven by composite oil cylinder, realize being separated.
Compared with being shaped with plastic medium compound punch Extrusion bulging, the structure of the bulging drift of plastic medium separate punches Extrusion bulging mould and motion are comparatively complicated, and need increase a set of driving bulging and rush cephalomotor mechanism.
Compared with liquid medium Extrusion bulging mode, although the motion of plastic medium separate punches Extrusion bulging drift is comparatively complicated, but avoid expensive hydraulic pressure boosting system, therefore there is equipment investment less, and the advantage that productivity ratio is high, forming effect is good, but it also exists that the service life of drift is lower, mould structure is more complicated and can not be applied to the too little occasion of tube blank size.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former, the expansion forming requirement of three-way pipe can not only be met, and simultaneously in conjunction with rigidity bulging and hydraulic expanding-forming, the overall process of three-way pipe bulging distortion can be controlled preferably.
For achieving the above object, the invention provides following technical scheme:
A kind of hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former, comprise upper mold section and female die, cylindrical shaping die cavity is provided with between described upper mold section and female die, the two ends of described shaping die cavity are separately installed with the bulging extruding drift be slidably matched with it, described female die is provided with the arm forming cavity of the intersect vertical axis of axis and described shaping die cavity, in described arm forming cavity, balance drift is installed, rigidity bulging internal mold is provided with between two described bulging extruding drifts, described rigidity bulging internal mold comprises the push rod laying respectively at two ends, be provided with between two described push rods and coordinate with described arm forming cavity and shaping inner module for driving pipe bulging to be out of shape, be connected by two hinge bar between described shaping inner module with two described push rods, the axis of described push rod and the axis being parallel of described shaping die cavity are also slidably installed respectively and extrude in drift at corresponding described bulging, bulging liquid entrance and the outlet of bulging liquid is provided with in described bulging extruding drift, wherein a push rod is provided with bayonet type quick-detachment syndeton, the two ends of described shaping die cavity are respectively equipped with the composite hydraulic cylinder for driving described bulging extruding drift to slide in described shaping die cavity and for driving described push rod to slide in described bulging extruding drift,
Described composite hydraulic cylinder comprises outer cylinder body, the center of described outer cylinder body is provided with the inner cylinder body coaxial with it, be provided with in described inner cylinder body and be slidably matched and the inner piston rod be connected with corresponding described push rod with it, be provided with in described outer cylinder body and be slidably matched with it and extrude with corresponding described bulging the outer piston bar that drift is fixedly connected with, described outer piston bar is slidably matched and is sleeved on described inner cylinder body;
The below of described female die is provided with die shoe, to be provided with described arm forming cavity with shaft balancing through hole, to be provided with balance adjustment bar, to be provided with buffer rubber gasket between described balance adjustment bar and described balance drift in described balance through hole in described die shoe;
The described push rod split being provided with described bayonet type quick-detachment syndeton is set near the push rod medial segment of described rigidity bulging internal mold and the push rod segmentum laterale away from described rigidity bulging internal mold, described push rod segmentum laterale is provided with centre bore towards the end face of described push rod medial segment, be slidably matched with it in described centre bore and be provided with pusher, described pusher is hingedly provided with mechanical snap towards one end annular of described rigidity bulging internal mold is uniform, the end face of described push rod segmentum laterale is provided with described mechanical snap one_to_one corresponding groove of stepping down, rotating shaft is provided with in described groove of stepping down, the rotating middle part engagement sleeves of described mechanical snap is contained in described rotating shaft, described push rod medial segment is provided with draw-in groove towards the end periphery wall of described push rod segmentum laterale, described mechanical snap is provided with the grab coordinated with described draw-in groove, in described pusher, cover is equiped with and is positioned at described centre bore and for described its is released the spring of described centre bore, and described push rod medial segment is provided with towards the end face of described push rod segmentum laterale and coordinates with described centre bore and for described pusher being pushed to the projection in described centre bore,
Aux. pressure mechanism is provided with between two described push rods, described aux. pressure mechanism comprises balancing pole, two described push rods one end end face is in opposite directions provided with balance slide opening, the two ends of described balancing pole are slidably installed respectively in two described balance slide openings, and the two ends of described balancing pole are set with the balancing spring being provided with and being positioned at corresponding described balance slide opening; Auxiliary hydraulic cylinder is provided with between described balancing pole and described shaping inner module.
Further, described push rod and described bulging extrude between drift and are provided with high pressure seal structure.
Further, hermetically-sealed construction is provided with between described bulging extruding drift and described shaping die cavity.
Further, described bulging liquid entrance and the outlet of bulging liquid are separately positioned in two described bulging extruding drifts.
Further, the damped coefficient of two described balancing springs is equal.
Further, described auxiliary hydraulic cylinder is multistage hydraulic cylinder, described multistage hydraulic cylinder comprises auxiliary piston rod and at least two-stage is stacked is set in together and is the auxiliary hydraulic cylinder cylinder body of stretching structure, described auxiliary piston rod is sleeved on the auxiliary hydraulic cylinder cylinder body of innermost layer, rodless cavity is formed between outermost auxiliary hydraulic cylinder cylinder body and auxiliary piston rod, rod end chamber is formed between the auxiliary hydraulic cylinder cylinder body and auxiliary piston rod of innermost layer, classification oil pocket is formed between adjacent two-stage hydraulic cylinder body, described rodless cavity, rod end chamber is equipped with on classification oil pocket the hydraulic fluid port be connected with hydraulic power source, being positioned at outermost described auxiliary hydraulic cylinder cylinder body is fixedly mounted on described balancing pole, and described auxiliary piston rod is fixedly connected with described shaping inner module.
Further, between adjacent two-stage hydraulic cylinder body and between auxiliary piston rod and innermost layer hydraulic cylinder body, the top being positioned at outer field hydraulic cylinder body is provided with the inner baffle ring extended radially inwardly, the bottom being positioned at the hydraulic cylinder body/auxiliary piston rod of internal layer be provided with extend radially outwardly and the outer baffle ring coordinated with inner baffle ring, be provided with hermetically-sealed construction between the periphery wall of described inner baffle ring and internal layer hydraulic cylinder body, between the internal perisporium of described outer baffle ring and outer hydraulic cylinder body, be provided with hermetically-sealed construction.
Further, the hydraulic fluid port be arranged on described rod end chamber and classification oil pocket is arranged on described inner baffle ring.
Beneficial effect of the present invention is:
Hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former of the present invention, by arranging rigidity bulging internal mold between two bulging extruding drifts, during use, pipe is placed in shaping die cavity, rigidity bulging internal mold correspondence is arranged in pipe, the two ends of pipe utilize bulging to extrude drift press seal respectively, and fill liquid medium in pipe; During bulging, composite hydraulic cylinder is utilized to drive bulging extruding drift to apply axial extruding force to pipe, the pressure of liquid medium in shaping die cavity accurately can be controlled by bulging liquid entrance and the outlet of bulging liquid, and then the accurate liquid bulging pressure controlling pipe and be subject to; In addition, the motion of push rod also can drive shaping inner module to the motion of arm forming cavity, and shaping inner module applies rigidity bulging power to the bulging deformed region of pipe, under the acting in conjunction of rigidity bulging power and liquid bulging pressure, drive the distortion of pipe bulging, and then be configured as three-way pipe; By arranging aux. pressure mechanism, in the starting stage of pipe bulging distortion, because the angle of two hinge bar and pipe axis is very little, be converted to the vertical stress component perpendicular to pipe axis of shaping inner module less by push rod thrust, and the pressure effect of aux. pressure mechanism can act directly on shaping inner module, with vertical stress component and the acting in conjunction of liquid bulging pressure, pipe bulging can be driven better to be out of shape, namely can to meet the expansion forming requirement of wide tee pipe;
Owing to have employed rigidity bulging internal mold, rigidity bulging power is applied to pipe, suitably can reduce the size of liquid medium to the liquid bulging pressure that pipe applies, namely the thrust size that composite hydraulic cylinder applies push rod can be reduced, the movement rate of shaping inner module and stroke all can by the motion controls of push rod, thus, hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former of the present invention can control the overall process of three-way pipe bulging distortion preferably; In addition, by arranging bulging liquid entrance and the outlet of bulging liquid in bulging extruding drift, the amount of the liquid medium in adjustable forming recess, do not mate between the space preventing the forming recess space increments because push rod occupies and the distortion of pipe bulging from increasing and liquid bulging pressure oscillation that the liquid medium that causes exports, make expansion forming process more stable; And under the effect of liquid bulging pressure, pipe is in expansion forming process, and its inwall all can receive the effect of liquid bulging pressure, can fit with the inwall of shaping die cavity and arm forming cavity after pipe distortion, forming quality is better.
In addition, by arranging bayonet type quick-detachment syndeton, during use, thrust device is utilized to promote push rod segmentum laterale near push rod medial segment, the protruding pusher that drives is moved to centre bore, and driving device buckle rotates, and makes grab be stuck in draw-in groove, so, push rod segmentum laterale and push rod medial segment can be made automatically to connect as one, after three-way pipe bulging completes, thrust device driving push rod segmentum laterale dorsad rigidity bulging internal mold moves, contact force between push rod segmentum laterale and push rod medial segment reduces, under the action of the spring, drive pusher outwards movement, driving device buckle rotates, grab departs from draw-in groove, make push rod segmentum laterale and push rod medial segment quick separating, so, easily the three-way pipe of shaping can be exited from push rod medial segment, and new pipe is enclosed within rigidity bulging internal mold from push rod medial segment, realize the quick connection between push rod segmentum laterale and push rod medial segment and quick-detachment object.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is the structural representation of existing a kind of three-way pipe liquid medium Extrusion bulging mould;
Fig. 2 is the structural representation of existing a kind of plastic medium compound punch Extrusion bulging mould;
Fig. 3 is the structural representation of existing a kind of plastic medium separate punches Extrusion bulging mould;
Fig. 4 is the structural representation of hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former embodiment of the present invention;
Fig. 5 is the A detail drawing of Fig. 4;
Fig. 6 is the B detail drawing of Fig. 4;
Fig. 7 is the C detail drawing of Fig. 4;
Fig. 8 is the structural representation of auxiliary hydraulic cylinder.
Description of reference numerals:
1-upper mold section; 2-female die; 3-shaping die cavity; 4-bulging extruding drift; 5-arm forming cavity; 6-balances drift; 7-pipe; 8-push rod; 9-shaping inner module; The two hinge bar of 10-; 11-push rod medial segment; 12-push rod segmentum laterale; 14-outer cylinder body; 15-inner cylinder body; 16-inner piston rod; 17-outer piston bar; 18-centre bore; 19-pusher; 20-mechanical snap; 21-steps down groove; 22-rotating shaft; 23-grab; 24-spring; 25-is protruding; 26-bulging liquid entrance; 27-bulging liquid exports; 28-die shoe; 29-balance adjustment bar; 30-buffer rubber gasket;
50-balancing pole; 51-balances slide opening; 52-balancing spring; 53-auxiliary hydraulic cylinder; 54-auxiliary piston rod; 55-auxiliary hydraulic cylinder cylinder body; 56-rodless cavity; 57-rod end chamber; 58-classification oil pocket; 59-hydraulic fluid port; 60-inner baffle ring; 61-outer baffle ring.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described, can better understand the present invention and can be implemented, but illustrated embodiment is not as a limitation of the invention to make those skilled in the art.
As shown in Figure 4, be the structural representation of hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former embodiment of the present invention.The hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former of the present embodiment, comprise upper mold section 1 and female die 2, cylindrical shaping die cavity 3 is provided with between upper mold section 1 and female die 2, the two ends of shaping die cavity 3 are separately installed with the bulging extruding drift 4 be slidably matched with it, female die 1 is provided with the arm forming cavity 5 of the intersect vertical axis of axis and shaping die cavity 3, the inwall of arm forming cavity 5 is cylindrical, balance drift 6 is installed in arm forming cavity 5, rigidity bulging internal mold is provided with between two bulging extruding drifts 4, rigidity bulging internal mold comprises the push rod 8 laying respectively at two ends, be provided with between two push rods 8 and coordinate with arm forming cavity 5 and shaping inner module 9 for driving pipe 7 bulging to be out of shape, be connected by linkage between shaping inner module 9 with two push rods 8, the linkage of the present embodiment comprises the two hinge bars 10 be arranged between push rod 8 and shaping inner module 9, be connected by two hinge bar 10 between push rod 8 with shaping inner module 9.
The axis of push rod 8 and the axis being parallel of shaping die cavity 3 are also slidably installed respectively and extrude in drift 4 at corresponding bulging, namely two push rods 8 are slidably installed respectively in two bulging extruding drifts 4, be provided with bulging liquid entrance 26 and bulging liquid outlet 27 in bulging extruding drift 4, the bulging liquid entrance 26 of the present embodiment and bulging liquid outlet 27 are separately positioned in two bulging extruding drifts 4.Wherein a push rod 8 is provided with bayonet type quick-detachment syndeton.Push rod 8 split that the present embodiment is provided with bayonet type quick-detachment syndeton is set near the push rod medial segment 11 of rigidity bulging internal mold and the push rod segmentum laterale 12 away from rigidity bulging internal mold, push rod segmentum laterale 12 is provided with centre bore 18 towards the end face of push rod medial segment 11, be slidably matched with it in centre bore 18 and be provided with pusher 19, pusher 19 is hingedly provided with mechanical snap 20 towards one end annular of rigidity bulging internal mold is uniform, the end face of push rod segmentum laterale 12 is provided with mechanical snap 20 one_to_one corresponding groove 21 of stepping down, step down in groove 21 and be provided with rotating shaft 22, the rotating middle part engagement sleeves of mechanical snap 20 is contained in rotating shaft 22, push rod medial segment 11 is provided with draw-in groove towards the end periphery wall of push rod segmentum laterale 12, mechanical snap 20 is provided with the grab 23 coordinated with draw-in groove.In pusher 19, cover is equiped with and is positioned at centre bore 18 and spring 24 for being released centre bore 18, and push rod medial segment 11 is provided with towards the end face of push rod segmentum laterale 12 and coordinates with centre bore 18 and for pusher 19 being pushed to the projection 25 in centre bore 18.
The two ends of shaping die cavity 3 are respectively equipped with the composite hydraulic cylinder for driving bulging extruding drift 4 to slide in shaping die cavity 3 and for driving push rod 8 to slide in bulging extruding drift 4.The composite hydraulic cylinder of the present embodiment comprises outer cylinder body 14, the center of outer cylinder body 14 is provided with the inner cylinder body 15 coaxial with it, be provided with in inner cylinder body 15 and be slidably matched and the inner piston rod 16 be connected with corresponding push rod 8 with it, be provided with in outer cylinder body 14 and be slidably matched with it and extrude with corresponding bulging the outer piston bar 17 that drift 4 is fixedly connected with, outer piston bar 17 is slidably matched and is sleeved on inner cylinder body 15.So, the two ends that outer piston bar 17 just can be utilized to drive bulging to extrude drift 4 pairs of pipes 7 apply extruding force effect respectively, inner piston rod 16 is utilized to drive push rod to slide in bulging extruding drift 4, and then making the liquid medium being full of pipe 7 inside apply liquid bulging pressure to pipe 7 and drive shaping inner module 9 to move to arm forming cavity 5, the bulging deformed region to pipe 7 applies rigidity bulging power.Preferably, the push rod 8 of the present embodiment and bulging extrude between drift 4 and are provided with high pressure seal structure, certainly, be also provided with hermetically-sealed construction, can prevent liquid medium from leaking between bulging extruding drift 4 and the inwall of shaping die cavity 3.In addition, after outer piston bar 17 bounces back, bayonet type quick-detachment syndeton can be outside exposed, is convenient to install pipe 7 and the three-way pipe after taking off shaping.
The below of female die 2 is provided with die shoe 28, is provided with arm forming cavity 5 with shaft balancing through hole in die shoe 28, is provided with balance adjustment bar 29 in balance through hole, is provided with buffer rubber gasket 30 between balance adjustment bar 29 and balance drift 6.The equilibrant force that balance drift 6 can be made to act on pipe 7 is more even.
Aux. pressure mechanism is provided with between two push rods 8 of the present embodiment, aux. pressure mechanism comprises balancing pole 50, two push rods 8 one end end face is in opposite directions provided with balance slide opening 51, the two ends of balancing pole 50 are slidably installed respectively in two balance slide openings 51, and the two ends of balancing pole 50 are set with the balancing spring 52 being provided with and being positioned at corresponding balance slide opening; Auxiliary hydraulic cylinder 53 is provided with between balancing pole 50 and shaping inner module 9.The damped coefficient of two balancing springs 52 of the present embodiment is equal, can ensure the dynamic equilibrium of balancing pole 50.
Further, auxiliary hydraulic cylinder 53 is multistage hydraulic cylinder, multistage hydraulic cylinder comprises auxiliary piston rod 54 and at least two-stage is stacked is set in together and is the auxiliary hydraulic cylinder cylinder body 55 of stretching structure, auxiliary piston rod 54 is sleeved on the auxiliary hydraulic cylinder cylinder body 55 of innermost layer, rodless cavity 56 is formed between outermost auxiliary hydraulic cylinder cylinder body 55 and auxiliary piston rod 54, rod end chamber 57 is formed between the auxiliary hydraulic cylinder cylinder body 55 and auxiliary piston rod 54 of innermost layer, classification oil pocket 58 is formed between adjacent two-stage hydraulic cylinder body 55, rodless cavity 56, rod end chamber 57 with classification oil pocket 58 is equipped with the hydraulic fluid port 59 be connected with hydraulic power source.As shown in Figure 7, the auxiliary hydraulic cylinder 53 of the present embodiment comprises three grades and is stackedly set in together and is the auxiliary hydraulic cylinder cylinder body 55 of stretching structure, being positioned at outermost auxiliary hydraulic cylinder cylinder body 55 is fixedly mounted on balancing pole 50, and auxiliary piston rod 54 is fixedly connected with shaping inner module 9.Adopt the auxiliary hydraulic cylinder 53 of this structure, outwards provide in the process of hydraulic thrust at auxiliary piston rod 54, rodless cavity 56 oil-feed, rod end chamber 57 and classification oil pocket 58 all oil returns, can realize auxiliary hydraulic cylinder 53 and extend and outwards provide hydraulic coupling; In like manner, when piston rod 54 bounces back, rodless cavity 56 oil return, rod end chamber 57 and classification oil pocket 58 all oil-feeds, can realize piston rod 54 and bounce back.
Further, between adjacent two-stage hydraulic cylinder body 55 and between auxiliary piston rod 54 and innermost layer hydraulic cylinder body 55, the top being positioned at outer field hydraulic cylinder body 55 is provided with the inner baffle ring 60 extended radially inwardly, the bottom being positioned at hydraulic cylinder body 55/ auxiliary piston rod 54 of internal layer be provided with extend radially outwardly and the outer baffle ring 61 coordinated with inner baffle ring 60, be provided with hermetically-sealed construction between the periphery wall of inner baffle ring 60 and internal layer hydraulic cylinder body 55, between the internal perisporium of outer baffle ring 61 and outer hydraulic cylinder body 55, be provided with hermetically-sealed construction.Adopt the auxiliary hydraulic cylinder 53 of this structure, between inner baffle ring 60 and outer baffle ring 61, form position-limit mechanism, prevent adjacent two-stage hydraulic cylinder body 55 and depart between innermost layer hydraulic cylinder body 55 and auxiliary piston rod 54.Preferably, and the hydraulic fluid port 59 be arranged on rod end chamber 57 and classification oil pocket 58 is arranged on inner baffle ring 60, prevents auxiliary hydraulic cylinder 53 in telescopic process, interferes between hydraulic cylinder body 55 and hydraulic fluid port 59.
The hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former of the present embodiment, by arranging rigidity bulging internal mold between two bulging extruding drifts 4, during use, pipe 7 is placed in shaping die cavity 3, rigidity bulging internal mold correspondence is arranged in pipe 7, the two ends of pipe 7 utilize bulging to extrude drift 4 press seal respectively, and fill liquid medium in pipe 7; During bulging, composite hydraulic cylinder is utilized to drive bulging extruding drift 4 pairs of pipes 7 to apply axial extruding force, the pressure of liquid medium in shaping die cavity accurately can be controlled by bulging liquid entrance 26 and bulging liquid outlet 27, and then the accurate liquid bulging pressure controlling pipe and be subject to; In addition, the motion of push rod 8 also can drive shaping inner module 9 to move to arm forming cavity 5, and shaping inner module 9 applies rigidity bulging power to the bulging deformed region of pipe 7, under the acting in conjunction of rigidity bulging power and liquid bulging pressure, drive the distortion of pipe 7 bulging, and then be configured as three-way pipe.By arranging aux. pressure mechanism, in the starting stage of pipe 7 bulging distortion, because two hinge bar 10 is very little with the angle of pipe 7 axis, be converted to the vertical stress component perpendicular to pipe 7 axis of shaping inner module 9 less by push rod 8 thrust, and the pressure effect of aux. pressure mechanism can act directly on shaping inner module 9, with vertical stress component and the acting in conjunction of liquid bulging pressure, pipe bulging can be driven better to be out of shape, namely can to meet the expansion forming requirement of wide tee pipe.
Owing to have employed rigidity bulging internal mold, rigidity bulging power is applied to pipe, suitably can reduce the size of liquid medium to the liquid bulging pressure that pipe 7 applies, namely the thrust size that composite hydraulic cylinder applies push rod can be reduced, the movement rate of shaping inner module 9 and stroke all can by the motion controls of push rod 8, thus, the present embodiment hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former can control the overall process of three-way pipe bulging distortion preferably; In addition, by arranging bulging liquid entrance 26 and bulging liquid outlet 27 in bulging extruding drift 4, the amount of the liquid medium in adjustable forming recess 3, do not mate between the space preventing the forming recess space increments because push rod 8 occupies and the distortion of pipe 7 bulging from increasing and liquid bulging pressure oscillation that the liquid medium that causes exports, make expansion forming process more stable; And under the effect of liquid bulging pressure, pipe 7 is in expansion forming process, and its inwall all can receive the effect of liquid bulging pressure, pipe 7 can be fitted with the inwall of shaping die cavity 3 and arm forming cavity 5 after being out of shape, and forming quality is better.
In addition, by arranging bayonet type quick-detachment syndeton, during use, thrust device is utilized to promote push rod segmentum laterale 12 near push rod medial segment 11, protruding 25 drive pusher 19 to move to centre bore 18, and driving device buckle 20 rotates, and makes grab 23 be stuck in draw-in groove, so, push rod segmentum laterale 12 and push rod medial segment 11 can be made automatically to connect as one, after three-way pipe bulging completes, thrust device driving push rod segmentum laterale 12 dorsad rigidity bulging internal mold moves, contact force between push rod segmentum laterale 12 and push rod medial segment 11 reduces, under the effect of spring 24, drive pusher 19 outwards movement, driving device buckle 20 rotates, grab 23 departs from draw-in groove, make push rod segmentum laterale 12 and push rod medial segment 11 quick separating, so, easily the three-way pipe of shaping can be exited from push rod medial segment 11, and new pipe is enclosed within rigidity bulging internal mold from push rod medial segment 11, realize the quick connection between push rod segmentum laterale 12 and push rod medial segment 11 and quick-detachment object.
The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that the present invention lifts.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.

Claims (8)

1. a hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former, comprise upper mold section and female die, cylindrical shaping die cavity is provided with between described upper mold section and female die, the two ends of described shaping die cavity are separately installed with the bulging extruding drift be slidably matched with it, described female die is provided with the arm forming cavity of the intersect vertical axis of axis and described shaping die cavity, in described arm forming cavity, balance drift is installed, it is characterized in that: between two described bulging extruding drifts, be provided with rigidity bulging internal mold, described rigidity bulging internal mold comprises the push rod laying respectively at two ends, be provided with between two described push rods and coordinate with described arm forming cavity and shaping inner module for driving pipe bulging to be out of shape, be connected by two hinge bar between described shaping inner module with two described push rods, the axis of described push rod and the axis being parallel of described shaping die cavity are also slidably installed respectively and extrude in drift at corresponding described bulging, bulging liquid entrance and the outlet of bulging liquid is provided with in described bulging extruding drift, wherein a push rod is provided with bayonet type quick-detachment syndeton, the two ends of described shaping die cavity are respectively equipped with the composite hydraulic cylinder for driving described bulging extruding drift to slide in described shaping die cavity and for driving described push rod to slide in described bulging extruding drift,
Described composite hydraulic cylinder comprises outer cylinder body, the center of described outer cylinder body is provided with the inner cylinder body coaxial with it, be provided with in described inner cylinder body and be slidably matched and the inner piston rod be connected with corresponding described push rod with it, be provided with in described outer cylinder body and be slidably matched with it and extrude with corresponding described bulging the outer piston bar that drift is fixedly connected with, described outer piston bar is slidably matched and is sleeved on described inner cylinder body;
The below of described female die is provided with die shoe, to be provided with described arm forming cavity with shaft balancing through hole, to be provided with balance adjustment bar, to be provided with buffer rubber gasket between described balance adjustment bar and described balance drift in described balance through hole in described die shoe;
The described push rod split being provided with described bayonet type quick-detachment syndeton is set near the push rod medial segment of described rigidity bulging internal mold and the push rod segmentum laterale away from described rigidity bulging internal mold, described push rod segmentum laterale is provided with centre bore towards the end face of described push rod medial segment, be slidably matched with it in described centre bore and be provided with pusher, described pusher is hingedly provided with mechanical snap towards one end annular of described rigidity bulging internal mold is uniform, the end face of described push rod segmentum laterale is provided with described mechanical snap one_to_one corresponding groove of stepping down, rotating shaft is provided with in described groove of stepping down, the rotating middle part engagement sleeves of described mechanical snap is contained in described rotating shaft, described push rod medial segment is provided with draw-in groove towards the end periphery wall of described push rod segmentum laterale, described mechanical snap is provided with the grab coordinated with described draw-in groove, in described pusher, cover is equiped with and is positioned at described centre bore and for described its is released the spring of described centre bore, and described push rod medial segment is provided with towards the end face of described push rod segmentum laterale and coordinates with described centre bore and for described pusher being pushed to the projection in described centre bore,
Aux. pressure mechanism is provided with between two described push rods, described aux. pressure mechanism comprises balancing pole, two described push rods one end end face is in opposite directions provided with balance slide opening, the two ends of described balancing pole are slidably installed respectively in two described balance slide openings, and the two ends of described balancing pole are set with the balancing spring being provided with and being positioned at corresponding described balance slide opening; Auxiliary hydraulic cylinder is provided with between described balancing pole and described shaping inner module.
2. hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former according to claim 1, is characterized in that: described push rod and described bulging extrude between drift and be provided with high pressure seal structure.
3. hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former according to claim 2, is characterized in that: be provided with hermetically-sealed construction between described bulging extruding drift and described shaping die cavity.
4. hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former according to claim 1, is characterized in that: described bulging liquid entrance and the outlet of bulging liquid are separately positioned in two described bulging extruding drifts.
5. hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former according to claim 1, is characterized in that: the damped coefficient of two described balancing springs is equal.
6. the hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former according to any one of claim 1-5, it is characterized in that: described auxiliary hydraulic cylinder is multistage hydraulic cylinder, described multistage hydraulic cylinder comprises auxiliary piston rod and at least two-stage is stacked is set in together and is the auxiliary hydraulic cylinder cylinder body of stretching structure, described auxiliary piston rod is sleeved on the auxiliary hydraulic cylinder cylinder body of innermost layer, rodless cavity is formed between outermost auxiliary hydraulic cylinder cylinder body and auxiliary piston rod, rod end chamber is formed between the auxiliary hydraulic cylinder cylinder body and auxiliary piston rod of innermost layer, classification oil pocket is formed between adjacent two-stage hydraulic cylinder body, described rodless cavity, rod end chamber is equipped with on classification oil pocket the hydraulic fluid port be connected with hydraulic power source, being positioned at outermost described auxiliary hydraulic cylinder cylinder body is fixedly mounted on described balancing pole, and described auxiliary piston rod is fixedly connected with described shaping inner module.
7. hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former according to claim 6, it is characterized in that: between adjacent two-stage hydraulic cylinder body and between auxiliary piston rod and innermost layer hydraulic cylinder body, the top being positioned at outer field hydraulic cylinder body is provided with the inner baffle ring extended radially inwardly, the bottom being positioned at the hydraulic cylinder body/auxiliary piston rod of internal layer be provided with extend radially outwardly and the outer baffle ring coordinated with inner baffle ring, hermetically-sealed construction is provided with between the periphery wall of described inner baffle ring and internal layer hydraulic cylinder body, hermetically-sealed construction is provided with between the internal perisporium of described outer baffle ring and outer hydraulic cylinder body.
8. hydraulically-controlled type wide tee pipe bayonet type rigid plastic Compound Forming of Bulging former according to claim 7, is characterized in that: the hydraulic fluid port be arranged on described rod end chamber and classification oil pocket is arranged on described inner baffle ring.
CN201510346915.2A 2015-06-19 2015-06-19 Hydraulic control type large-diameter T-branch pipe locking type rigid-plasticity combined bulging forming equipment Pending CN105268810A (en)

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Application publication date: 20160127