CN105268809A - Hydraulic control type T-branch pipe rigid-plasticity combined multi-cylinder type bulging forming equipment - Google Patents
Hydraulic control type T-branch pipe rigid-plasticity combined multi-cylinder type bulging forming equipment Download PDFInfo
- Publication number
- CN105268809A CN105268809A CN201510346864.3A CN201510346864A CN105268809A CN 105268809 A CN105268809 A CN 105268809A CN 201510346864 A CN201510346864 A CN 201510346864A CN 105268809 A CN105268809 A CN 105268809A
- Authority
- CN
- China
- Prior art keywords
- bulging
- push rod
- drift
- liquid
- forming equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses hydraulic control type T-branch pipe rigid-plasticity combined multi-cylinder type bulging forming equipment. The hydraulic control type T-branch pipe rigid-plasticity combined multi-cylinder type 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, and a forming inner die block is arranged between the two push rods; the forming inner die block is connected with the two push rods through connecting rod mechanisms; the push rods are installed in the corresponding bulging squeezing punches respectively in a sliding matching mode, and 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 rapid detachment and connecting structure; thrust devices are arranged at the two ends of the forming cavity respectively; each thrust device comprises at least three squeezing hydraulic cylinders and a central hydraulic cylinder, wherein the squeezing hydraulic cylinders are annularly and uniformly distributed around the axis of the central hydraulic cylinder.
Description
Technical field
The invention belongs to tubing without Machining Technology for Cutting field, be specifically related to a kind of hydraulically-controlled type 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 hydraulically-controlled type 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 hydraulically-controlled type 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, bulging liquid entrance and the outlet of bulging liquid is provided with in described bulging extruding drift, 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.
Further, described bulging liquid entrance and the outlet of bulging liquid are separately positioned in two described bulging extruding drifts.
Beneficial effect of the present invention is:
Hydraulically-controlled type 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, 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; 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; 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.
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 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; 18-bulging liquid entrance; 19-bulging liquid exports.
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 three-way pipe rigid plastic compound multiple casing expansion forming apparatus embodiments of the present invention.The hydraulically-controlled type 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, be provided with bulging liquid entrance 18 and bulging liquid outlet 19 in bulging extruding drift 4, the bulging liquid entrance 18 of the present embodiment and bulging liquid outlet 19 are separately positioned in two bulging extruding drifts 4.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 hydraulically-controlled type 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, the pressure of liquid medium in shaping die cavity accurately can be controlled by bulging liquid entrance 18 and bulging liquid outlet 19, 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.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 three-way pipe rigid plastic compound multiple casing expansion forming equipment can control the overall process of three-way pipe bulging distortion preferably; In addition, by arranging bulging liquid entrance 18 and bulging liquid outlet 19 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.
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 (5)
1. a hydraulically-controlled type 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, bulging liquid entrance and the outlet of bulging liquid is provided with in described bulging extruding drift, 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. hydraulically-controlled type 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. hydraulically-controlled type 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. hydraulically-controlled type three-way pipe rigid plastic compound multiple casing expansion forming equipment according to claim 1, 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.
5. the hydraulically-controlled type three-way pipe rigid plastic compound multiple casing expansion forming equipment according to any one of claim 1-4, is characterized in that: described bulging liquid entrance and the outlet of bulging liquid are separately positioned in two described bulging extruding drifts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510346864.3A CN105268809A (en) | 2015-06-19 | 2015-06-19 | Hydraulic control type T-branch pipe rigid-plasticity combined multi-cylinder type bulging forming equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510346864.3A CN105268809A (en) | 2015-06-19 | 2015-06-19 | Hydraulic control type T-branch pipe rigid-plasticity combined multi-cylinder type bulging forming equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105268809A true CN105268809A (en) | 2016-01-27 |
Family
ID=55139148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510346864.3A Pending CN105268809A (en) | 2015-06-19 | 2015-06-19 | Hydraulic control type T-branch pipe rigid-plasticity combined multi-cylinder type bulging forming equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105268809A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4958067A (en) * | 1972-10-07 | 1974-06-05 | ||
| JP2002331319A (en) * | 2001-05-10 | 2002-11-19 | Kawasaki Heavy Ind Ltd | Method and apparatus for hydroforming |
| JP2006263752A (en) * | 2005-03-22 | 2006-10-05 | Nissan Motor Co Ltd | Hydroforming method and apparatus |
| CN102886465A (en) * | 2012-09-24 | 2013-01-23 | 重庆科技学院 | Overall composite mechanical spiral type bulging device for car drive axle |
| CN102886464A (en) * | 2012-09-24 | 2013-01-23 | 重庆科技学院 | Overall composite mechanical push rod type or inner high-pressure bulging device for car drive axle |
-
2015
- 2015-06-19 CN CN201510346864.3A patent/CN105268809A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4958067A (en) * | 1972-10-07 | 1974-06-05 | ||
| JP2002331319A (en) * | 2001-05-10 | 2002-11-19 | Kawasaki Heavy Ind Ltd | Method and apparatus for hydroforming |
| JP2006263752A (en) * | 2005-03-22 | 2006-10-05 | Nissan Motor Co Ltd | Hydroforming method and apparatus |
| CN102886465A (en) * | 2012-09-24 | 2013-01-23 | 重庆科技学院 | Overall composite mechanical spiral type bulging device for car drive axle |
| CN102886464A (en) * | 2012-09-24 | 2013-01-23 | 重庆科技学院 | Overall composite mechanical push rod type or inner high-pressure bulging device for car drive axle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105234248A (en) | Rigid and plastic compound multi-cylinder type bulging forming equipment for t-branch pipe | |
| CN105312387A (en) | T-branch pipe rigidity and plasticity compound bulging forming equipment | |
| CN105234247A (en) | Hydraulic control tee joint buckling rigid-plastic compounded bulging forming die | |
| CN105312396A (en) | Hydraulically controlled type t-branch pipe rigidity and plasticity composite bulging forming die | |
| CN105290196A (en) | Hydraulic controlled type rigid-plastic compound bulging and forming device for three-way pipe | |
| CN105234244A (en) | Hydraulic control tee joint rigid-plastic compounded bulging equipment | |
| CN105312397A (en) | Hydraulically controlled type t-branch pipe rigidity and plasticity composite type bulging device | |
| CN105268833A (en) | T-branch pipe rigid-plasticity combined bulging forming device | |
| CN105268814A (en) | Tee-joint pipe rigid and plastic composite bulging device | |
| CN105268809A (en) | Hydraulic control type T-branch pipe rigid-plasticity combined multi-cylinder type bulging forming equipment | |
| CN105268832A (en) | Large-diameter T-branch pipe rigid-plasticity combined multi-cylinder type bulging forming equipment | |
| CN105312394A (en) | T-branch pipe lock catch type rigidity and plasticity composite bulging forming die | |
| CN105312385A (en) | T-branch pipe lock catch type rigidity and plasticity composite bulging forming device | |
| CN105268813A (en) | Hydraulically-controlled type tee-joint pipe rigid and plastic composite bulging forming device | |
| CN105234245A (en) | Hydraulic control tee joint rigid-plastic compounded multi-cylinder bulging equipment | |
| CN105268819A (en) | Hydraulic control type T-branch pipe rigid-plasticity combined type bulging die | |
| CN105290193A (en) | Rigid-plastic compound multi-cylinder latch-type bulging device for three-way pipe | |
| CN105312393A (en) | Large-caliber hydraulically controlled type t-branch pipe rigidity and plasticity composite bulging forming device | |
| CN105268808A (en) | T-branch pipe rigid-plasticity combined multi-cylinder type bulging equipment | |
| CN105268810A (en) | Hydraulic control type large-diameter T-branch pipe locking type rigid-plasticity combined bulging forming equipment | |
| CN105268818A (en) | T-branch pipe locking type rigid-plasticity combined type bulging equipment | |
| CN105268815A (en) | Tee-joint pipe rigid and plastic composite bulging forming die | |
| CN105268820A (en) | Large-caliber hydraulically-controlled type tee joint pipe buckle type rigid and plastic composite bulging forming device | |
| CN105268811A (en) | Large-diameter T-branch pipe locking type rigid-plasticity combined bulging forming die | |
| CN105290197A (en) | Rigid-plastic compound bulging die for three-way pipes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160127 |
|
| RJ01 | Rejection of invention patent application after publication |