CN105234248A - Rigid and plastic compound multi-cylinder type bulging forming equipment for t-branch pipe - Google Patents

Rigid and plastic compound multi-cylinder type bulging forming equipment for t-branch pipe Download PDF

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Publication number
CN105234248A
CN105234248A CN201510346164.4A CN201510346164A CN105234248A CN 105234248 A CN105234248 A CN 105234248A CN 201510346164 A CN201510346164 A CN 201510346164A CN 105234248 A CN105234248 A CN 105234248A
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CN
China
Prior art keywords
bulging
push rod
shaping
drift
cavity
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Pending
Application number
CN201510346164.4A
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Chinese (zh)
Inventor
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 CN201510346164.4A priority Critical patent/CN105234248A/en
Publication of CN105234248A publication Critical patent/CN105234248A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a rigid and plastic compound multi-cylinder type bulging forming equipment for a t-branch pipe. The equipment comprises an upper half die and a lower half die. A molding cavity is formed between the upper half die and the lower half die. Bulging extrusion punches are installed at the two ends of the molding cavity respectively. A branch pipe forming cavity is formed in the lower half die. A balance punch is installed in the branch pipe forming cavity. A rigid inner bulging die is arranged between the two bulging extrusion punches. The rigid inner bulging die comprises push rods which are located at the two ends respectively. An inner forming die block is arranged between the two push rods. The inner forming die block is connected with the two push rods through connecting rod mechanisms. The axis of each push rod is parallel to the axis of the molding cavity. Each push rod is slidably installed in the corresponding bulging extrusion punch in a matched mode. A fast detachment connecting structure is arranged on one push rod. Thrust devices are arranged at the two ends of the molding cavity respectively. Each thrust device comprises three or more extrusion hydraulic cylinders and a central hydraulic cylinder, and the extrusion hydraulic cylinders are distributed uniformly in an annular mode relative to the axis of the central hydraulic cylinder.

Description

Three-way pipe rigid plastic compound multiple casing expansion forming equipment
Technical field
The invention belongs to tubing without Machining Technology for Cutting field, be specifically related to a kind of three-way pipe rigid plastic compound multiple casing expansion forming equipment.
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 three-way pipe rigid plastic compound multiple casing expansion forming equipment, 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 three-way pipe rigid plastic compound multiple casing expansion forming equipment, 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 linkage 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, and wherein a push rod is provided with quick-detachment syndeton, the two ends of described shaping die cavity are respectively equipped with thrust device,
Described thrust device comprises for driving described bulging to extrude the squeezed fluid cylinder pressure that slides in described shaping die cavity of drift and the central liquid cylinder pressure for driving described push rod to slide in described bulging extruding drift, and described squeezed fluid cylinder pressure comprises at least three and with the uniform setting of the axis of described central liquid cylinder pressure annular.
Further, described linkage comprises the two hinge bars be arranged between described push rod and described shaping inner module, is connected between described push rod with described shaping inner module by described pair of hinge bar.
Further, described push rod and described bulging extrude between drift and are provided with high pressure seal structure.
Further, the described push rod split being provided with described quick-detachment syndeton is set to two sections, wherein the end face center of one section of described push rod is provided with a taper combined hole, the end face center of another section of described push rod is provided with the taper joint head coordinated with described taper combined hole, and is provided with antislip body between the end face of two sections of described push rods.
Beneficial effect of the present invention is:
Three-way pipe rigid plastic compound multiple casing expansion forming equipment 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, utilize the uniform multiple squeezed fluid cylinder pressures of annular to drive bulging to extrude drift simultaneously and axial extruding force is applied to pipe, and utilize the push rod synchronous relative motion at Driven by Hydraulic Cylinder two ends, center, because push rod occupies pipe inner space, and then cause the pressure increase of liquid medium, liquid bulging pressure is applied to pipe; 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; 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, three-way pipe rigid plastic compound multiple casing expansion forming equipment of the present invention can control the overall process of three-way pipe bulging distortion preferably; 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.
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 three-way pipe rigid plastic compound multiple casing expansion forming apparatus embodiments of the present invention;
Fig. 5 is the A detail drawing of Fig. 4.
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-taper combined hole; 12-taper joint head; 13-antislip body; 14-squeezed fluid cylinder pressure; 15-central liquid cylinder pressure; 16-center piston bar; 17-extrusion piston bar.
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 three-way pipe rigid plastic compound multiple casing expansion forming apparatus embodiments of the present invention.The three-way pipe rigid plastic compound multiple casing expansion forming equipment 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, and wherein a push rod 8 is provided with quick-detachment syndeton, push rod 8 split that the present embodiment is provided with quick-detachment syndeton is set to two sections, wherein the end face center of one section of push rod 8 is provided with a taper combined hole 11, the end face center of another section of push rod 8 is provided with the taper joint head 12 coordinated with taper combined hole 11, and be provided with antislip body 13 between the end face of two sections of push rods 8, because push rod 8 is only subject to the effect of axial thrust, thus utilize taper combined hole 11 and taper joint head 12 can separation fast between sight line two ends push rod 8 and combination.By arranging quick-detachment syndeton, pipe 7 can be made to be sleeved on rigidity bulging internal mold from the push rod 8 be separated.
The two ends of shaping die cavity 3 are respectively equipped with thrust device.The thrust device of the present embodiment comprises for drive bulging to extrude squeezed fluid cylinder pressure 14 that drift 4 slides shaping die cavity 3 in for driving the central liquid cylinder pressure 15 of push rod 8 slip in bulging extruding drift 4, and squeezed fluid cylinder pressure 14 comprises at least three and with the annular uniform setting of the axis of central liquid cylinder pressure 15.Squeezed fluid cylinder pressure 14 annular of the present embodiment is laid with 4, and the extrusion piston bar 17 of squeezed fluid cylinder pressure 14 all extrudes drift 4 with bulging is fixedly connected with, and the center piston bar 16 of central liquid cylinder pressure 15 is connected with push rod 8.So, the two ends that extrusion piston bar 17 just can be utilized to drive bulging to extrude drift 4 pairs of pipes 7 apply extruding force effect respectively, center piston bar 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 extrusion piston bar 17 bounces back, quick-detachment syndeton can be outside exposed, is convenient to install pipe 7 and the three-way pipe after taking off shaping.
The three-way pipe rigid plastic compound multiple casing expansion forming equipment 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, utilize squeezed fluid cylinder pressure 14 to drive bulging to extrude drift 4 pairs of pipes 7 and apply axial extruding force, and utilize central liquid cylinder pressure 15 to drive push rod 8 synchronous relative motion at two ends, because push rod 8 occupies pipe 7 inner space, and then cause the pressure increase of liquid medium, liquid bulging pressure is applied to pipe 7; 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.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 three-way pipe rigid plastic compound multiple casing expansion forming equipment can control the overall process of three-way pipe bulging distortion preferably; 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.
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 (4)

1. a three-way pipe rigid plastic compound multiple casing expansion forming equipment, 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 linkage 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, and wherein a push rod is provided with quick-detachment syndeton, the two ends of described shaping die cavity are respectively equipped with thrust device,
Described thrust device comprises for driving described bulging to extrude the squeezed fluid cylinder pressure that slides in described shaping die cavity of drift and the central liquid cylinder pressure for driving described push rod to slide in described bulging extruding drift, and described squeezed fluid cylinder pressure comprises at least three and with the uniform setting of the axis of described central liquid cylinder pressure annular.
2. three-way pipe rigid plastic compound multiple casing expansion forming equipment according to claim 1, it is characterized in that: described linkage comprises the two hinge bars be arranged between described push rod and described shaping inner module, is connected between described push rod with described shaping inner module by described pair of hinge bar.
3. three-way pipe rigid plastic compound multiple casing expansion forming equipment 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.
4. the three-way pipe rigid plastic compound multiple casing expansion forming equipment according to any one of claim 1-3, it is characterized in that: the described push rod split being provided with described quick-detachment syndeton is set to two sections, wherein the end face center of one section of described push rod is provided with a taper combined hole, the end face center of another section of described push rod is provided with the taper joint head coordinated with described taper combined hole, and is provided with antislip body between the end face of two sections of described push rods.
CN201510346164.4A 2015-06-19 2015-06-19 Rigid and plastic compound multi-cylinder type bulging forming equipment for t-branch pipe Pending CN105234248A (en)

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CN201510346164.4A CN105234248A (en) 2015-06-19 2015-06-19 Rigid and plastic compound multi-cylinder type bulging forming equipment for t-branch pipe

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108655250A (en) * 2018-05-15 2018-10-16 周焱春 A kind of pipe fitting inflatable thermoforming process
CN108723163A (en) * 2018-05-15 2018-11-02 周焱春 A kind of pipe fitting inflatable thermoforming production equipment

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JP2006263752A (en) * 2005-03-22 2006-10-05 Nissan Motor Co Ltd Hydroforming method and apparatus
CN202762851U (en) * 2012-09-24 2013-03-06 重庆科技学院 Automobile drive axle integral combination machinery spiral-type bulging inner mould
CN203316638U (en) * 2013-06-06 2013-12-04 重庆科技学院 Automobile drive axle integral combination external driving type bulging device
CN104084469A (en) * 2014-06-25 2014-10-08 温州蓝天管件阀门有限公司 Tee pipe hydraulic molding device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006198646A (en) * 2005-01-19 2006-08-03 Nisshin Steel Co Ltd Hydroforming method
JP2006263752A (en) * 2005-03-22 2006-10-05 Nissan Motor Co Ltd Hydroforming method and apparatus
CN202762851U (en) * 2012-09-24 2013-03-06 重庆科技学院 Automobile drive axle integral combination machinery spiral-type bulging inner mould
CN203316638U (en) * 2013-06-06 2013-12-04 重庆科技学院 Automobile drive axle integral combination external driving type bulging device
CN104084469A (en) * 2014-06-25 2014-10-08 温州蓝天管件阀门有限公司 Tee pipe hydraulic molding device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108655250A (en) * 2018-05-15 2018-10-16 周焱春 A kind of pipe fitting inflatable thermoforming process
CN108723163A (en) * 2018-05-15 2018-11-02 周焱春 A kind of pipe fitting inflatable thermoforming production equipment
CN108723163B (en) * 2018-05-15 2019-09-03 安徽鼎方金属制品有限公司 A kind of pipe fitting inflatable thermoforming production equipment

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