CN106345867B - A kind of control elbow-punching forming machine - Google Patents
A kind of control elbow-punching forming machine Download PDFInfo
- Publication number
- CN106345867B CN106345867B CN201610769387.6A CN201610769387A CN106345867B CN 106345867 B CN106345867 B CN 106345867B CN 201610769387 A CN201610769387 A CN 201610769387A CN 106345867 B CN106345867 B CN 106345867B
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- module
- mold core
- support bar
- pipeline
- supporting block
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The present invention relates to a kind of control elbow-punching forming machines, including mounting bracket, cast outer mold structure and Internal core mould, external mold includes supporting block, the first upper module, the second upper module, the first lower module, the second lower module and pedestal, inner core includes upper mold core, lower mold core, first support bar and second support bar, first upper module, the second upper module, the first lower module, the second lower module, first support bar are synchronous with the rotation of second support bar holding, realize pipe bending.After processing, first support bar and second support bar are detached from pipeline under hydraulic stem drive, and upper mold core and lower mold core are also detached from, and whole process is all completed in an automated manner.
Description
Technical field
The present invention relates to a kind of control elbow-punching forming machines.
Background technology
It is in the prior art to be used for control elbow-punching forming machine, generally comprise mounting bracket, cast outer mold structure and inner core die
Tool, external mold generally comprise upper die and lower die, the bottom surface camber of upper mold and with semicircle concave inward structure, and lower die has and upper mold
The compatible arc in bottom surface and with semicircle concave inward structure, the cast outer mold structure design of this control elbow so that elbow
Punching press angle is limited to the radian of upper and lower mould, meanwhile, Internal core mould generally at separation design, in processing put by Internal core mould
Enter pipeline or taken out from pipeline and is all inconvenient, strong influence production efficiency, due to external mold and the knot of Internal core mould
Structure design is unreasonable, can cause the irregular phenomenon of pipeline peripheral surface part punching press.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of good forming effect, processing technology letter
Just, flexibly, the control elbow-punching forming machine of high degree of automation.
To achieve the above object, the present invention provides following technical solutions：The control elbow-punching forming machine, including installation
Holder, cast outer mold structure, Internal core mould and the first hydraulic press, the mounting bracket include upper mounted plate, fixed strut and lower fixation
Plate, first hydraulic press are mounted in upper mounted plate, and the cast outer mold structure includes supporting block, the first upper module, the second upper mold
Block, the first lower module, the second lower module and pedestal, the supporting block are connected at cylinder, the first hydraulic press with supporting block, drive
Supporting block oscilaltion, first upper module and the second upper module are connected by connection sheet with supporting block respectively is placed in support
The bottom of the both sides of block, first upper module and the second upper module is semi-circular recesses, the first upper module and the second upper module
It rotates using the cross-section center of supporting block point as the center of circle when pipeline is processed, first lower module and the second lower die
Block is mounted on the base, and first lower module and the second lower module are when pipeline is processed respectively with the junction of itself and pedestal
It rotates for the center of circle, it is cavity that pedestal, which is located at the first lower module and the lower section of the second lower module, and pedestal is located at bottom plate
On, the surface of the first lower module and the second lower module is semi-circular recesses, and the first lower module and the second lower module are located in pedestal
The end face in portion abuts and at the cambered surface being mutually adapted.Before processing, pipeline is placed in the first lower module and the second lower module
Semi-circular recesses in, since the end face that the first lower module and the second lower module are located at the middle of the base abuts and at mutually suitable
The cambered surface matched, the first lower module and the second lower module abut so that pipeline is horizontal, and Internal core mould is in hydraulic stem
Drive under enter be processed pipeline, then start processing, supporting block the first hydraulic press effect under drive the first upper module and
Second upper module declines towards pipeline, and the bottom of the first upper module and the second upper module fits with pipeline, and pipeline is integrally wrapped
It is trapped among among the first upper module, the second upper module and the first lower module, the second lower module, in the further effect of the first hydraulic press
Under, the first upper module and the second upper module rotate using the cross-section center of supporting block point as the center of circle, meanwhile, the first lower die
Block and the second lower module are rotated using the junction of itself and pedestal as the center of circle respectively so that the top and lower part of pipeline are simultaneously
It is bent, since the first lower module and the second lower module are located at the end face of the middle of the base respectively into the cambered surface being mutually adapted, first
Lower module and the second lower module can be held against during pipe bending, realize the rule bending of pipeline.
By using above-mentioned technical proposal, due to the first upper module, the second upper module and the first lower module, the first lower module
Mutually matched it can do circumferential movement so that for the angle of pipe bending convenient for control, operation is flexible, and can guarantee flexure plane
Rule forming.
The present invention is further arranged：Further include the second hydraulic press and third hydraulic press, the Internal core mould include upper mold core,
Lower mold core, first support bar and second support bar, second hydraulic press are connected with first support bar, the third hydraulic press with
Second support bar be connected, which can move along processed pipeline, and upper mold core is resisted against in lower mold core, first support bar with
Upper mold core is connected, and first support bar is rotated using the connecting place of itself and upper mold core as the center of circle when pipeline is processed, and second
Supporting rod is connected with lower mold core, and second support bar does circumferential turn using the connecting place of itself and lower mold core when pipeline is processed as the center of circle
Dynamic, the bottom surface of lower mold core is adapted with the shape of the inner wall of the pipe after processing, and Internal core mould, which enters, is processed pipeline, upper mold core and
When lower mold core abuts, bottom center's line of lower mold core and the both ends of the surface of the first lower module and the second lower module are against formed
Face is in the same plane.Before processing, pipeline is placed in the semi-circular recesses of the first lower module and the second lower module, due to
The end face that one lower module and the second lower module are located at the middle of the base abuts and at the cambered surface being mutually adapted, the first lower module and
Second lower module abuts so that pipeline is horizontal, Internal core mould second and third hydraulic stem drive under into
Enter processed pipeline, when upper mold core and lower mold core abut, under the bottom center's line and the first lower module and second of lower mold core
The both ends of the surface of module in the same plane, then start processing, supporting block is under the action of the first hydraulic press against formed face
The first upper module and the second upper module is driven to decline towards pipeline, the bottom of the first upper module and the second upper module is affixed with pipeline
It closes, pipeline is integrally enclosed among the first upper module, the second upper module and the first lower module, the second lower module, in the first liquid
Under the further effect of press, the first upper module and the second upper module do circumferential turn by the center of circle of the cross-section center of supporting block point
It is dynamic, meanwhile, the first lower module and the second lower module are rotated using the junction of itself and pedestal as the center of circle respectively so that pipeline
Top be bent simultaneously with lower part, since the first lower module and the second lower module are located at the end face of the middle of the base respectively at mutual
The cambered surface of adaptation, the first lower module and the second lower module can be held against during pipe bending, in addition, due to Internal core mould
First support bar rotated as the center of circle using the central point of itself and the connecting place activity bolt of upper mold core when pipeline is processed,
Second support bar is rotated using the central point of itself and the connecting place activity bolt of lower mold core as the center of circle when pipeline is processed, on
Mold core and lower mold core abut fixed, i.e., pipeline is stamped in bending process, the first upper module, the second upper module,
One lower module, the second lower module, first support bar are synchronous with the rotation of second support bar holding, common to realize the good curved of pipeline
It is bent.Pipe bending after processing is completed, first support bar and second support bar are respectively in the second hydraulic press and third hydraulic press
Lower disengaging pipeline is driven, since upper mold core and lower mold core are connected with first support bar and second support bar respectively, upper mold core is under
Mold core is also detached from simultaneously, and whole process is all completed in an automated manner.
By using above-mentioned technical proposal, the first upper module, the second upper module, the first lower module, the second lower module, first
The rotation of supporting rod and second support bar keeps synchronouss, the common good bending for realizing pipeline, forming rule, at the same upper mold core with
Lower mold core is respectively together with first support bar and second support bar while into and out pipeline, and operation is simple, high degree of automation,
Therefore, the Internal core mould of this kind of control elbow punching press has the advantages that easy to operate, stable and forming rule.
The present invention is further arranged：Further include drop front and limited block, the drop front setting in upper mounted plate and
Between supporting block, drop front is connected with the first hydraulic press, and drop front lifting, supporting block connection are driven by the first hydraulic press
In the lower section of drop front, supporting block lifting is driven by drop front, since limited block setting is on fixed strut, works as active face
When plate is moved to the position of limited block, limit function is triggered, the first hydraulic press stops pressure.
By using above-mentioned technical proposal, when drop front drops to certain distance, limited block is touched, is triggered
Limit function, the first hydraulic press stop pressure, can guarantee that the bending of pipeline controls in reasonable range.
The present invention is further arranged：The side of the supporting block is arc concave shape, first upper module and the second upper mold
The side that block is connected with supporting block is arc evagination, and the arc concave shape is adapted with the shape of the arc evagination.
By using above-mentioned technical proposal, in processing, the first upper module and the second upper module are with the cross section of supporting block
Central point rotates for the center of circle, and arc concave shape structure compatible with the shape of arc evagination, which can guarantee, to be circumferentially rotated
What is carried out is more smooth, and process is more stablized.
The present invention is further arranged：It is the semicolumn metal derby with inclined-plane on the left of the upper mold core, is golden on the right side of upper mold core
Belong to piece, sheet metal is located at the middle part of metal derby, and the upper end of metal derby is flushed with the upper end of sheet metal, metal derby lower end and sheet metal
Lower end forms shoulder rank, has through-hole on sheet metal, and the outside of sheet metal is inclined design, under the outside and sheet metal of sheet metal
Hold transition at a right angle.
By using above-mentioned technical proposal, the inclined design on the left of upper mold core can guarantee that second support bar can be more in processing
Good circumferentially rotate, and metal derby lower end forms shoulder rank with sheet metal lower end, can so that upper mold core into after pipeline or
During pipeline processing, more stable it can be formed with lower mold core against having through-hole that can be convenient for itself and first on sheet metal
The connection of support, the outside of sheet metal are inclined design, the transition at a right angle of the outside of sheet metal and the lower end of sheet metal, can allow first
Supporting rod can be formed before processing with upper mold core against, be maintained on unified direction, since the outside of sheet metal is inclined design,
It is more smooth to ensure that first support bar rotates using its connecting place with upper mold core as the center of circle in processing.
The present invention is further arranged：For the lower mold core integral into semi-oval, lower mold core bottom surface is ellipse arc, lower mold core
It is a square posts on the left of surface, through-hole is equipped in lug, lower mold core surface middle part is equipped with boss, lower mold core surface middle part boss
It is respectively provided with groove between lower die wicking surface left side and lower die wicking surface right side.
By using above-mentioned technical proposal, lower mold core bottom surface is ellipse arc, can be preferably adapted with the inner wall of pipeline,
It is a square posts on the left of lower die wicking surface, is equipped with through-hole in lug, the design of through-hole can make lower mold core and second support bar
Convenient for connection, while before processing, lug can be formed with second support bar against so that lower mold core is maintained at second support bar
On unified direction, meanwhile, ensure what second support bar was rotated using the connecting place of itself and lower mold core as the center of circle in processing
It is more smooth.The setting of lower mold core surface middle part boss allows upper mold core and lower mold core against more when before processing or processing
Stablize.
The present invention is further arranged：One end of the first support bar is equipped with connecting hole, and other end top is convex block, lower part
Middle part with first support bar is shoulder rank transition, and the middle part of convex block is equipped with notch, and convex block is equipped with through-hole, the first support bar
It is identical as the structure of second support bar.
By using above-mentioned technical proposal, first support bar is identical as the structure of second support bar, and wherein connecting hole is set
Setting can be so that the connection that first support bar is stablized with hydraulic stem, the setting of convex block and its notch, can guarantee before processing or adds
The connection of working hour, supporting rod and upper mold core or lower mold core, against and relatively rotate etc. be all more smoothed out.
The present invention is further arranged：The bottom plate is being equipped with groove, the bottom on the direction that pipeline is placed
Seat bottom surface is equipped with raised line, and the shape of the raised line is adapted with the shape of the groove, and the pedestal can be in bottom plate upper edge
Groove direction moves.
By using above-mentioned technical proposal, the placement of pipeline is adjusted by the position of adjustment base, ensures elbow processing
Effect.
The invention will be further described below in conjunction with the accompanying drawings.
Description of the drawings
Fig. 1 is the structure chart of the present invention；
Fig. 2 is the Structure explosion diagram of the present invention；
Fig. 3 is the Structure explosion diagram of the cast outer mold structure of the present invention；
Fig. 4 is the Structure explosion diagram of the Internal core mould of the present invention；
11- upper mounted plates in figure, 12- fix strut, 13- bottom plates, 2- cast outer mold structures, 21- supporting blocks, 22- first
Upper module, the second upper modules of 23-, the first lower modules of 24-, the second lower modules of 25-, 26- pedestals, 27- connection sheets, 3- inner core dies
Tool, 31- upper mold cores, 32- lower mold cores, 33- first support bars, 34- second support bars, the first hydraulic presses of 4-, the second hydraulic presses of 5-,
6- third hydraulic presses, 7- drop fronts, 8- limited blocks.
Specific implementation mode
Referring to attached drawing 1 to attached drawing 4, the present invention discloses a kind of control elbow-punching forming machine, to achieve the above object, this hair
It is bright to provide following technical solution：A kind of control elbow-punching forming machine, including mounting bracket, cast outer mold structure 2, Internal core mould 3
With the first hydraulic press 4, the mounting bracket includes upper mounted plate 11, fixed strut 12 and bottom plate 13, first hydraulic pressure
Machine 4 is mounted in upper mounted plate 11, and the cast outer mold structure 2 includes supporting block 21, the first upper module 22, the second upper module 23, the
One lower module 24, the second lower module 25 and pedestal 26, the supporting block 21 is at cylinder, first hydraulic press 4 and supporting block
21 are connected, and first upper module, 22 and second upper module 23 is connected by connection sheet 27 with supporting block 21 respectively is placed in support
The both sides of block 21, the bottom of first upper module, 22 and second upper module 23 are semi-circular recesses, the first upper module 22 and the
Two upper modules 23 rotate when pipeline is processed using the cross-section center of supporting block 21 point as the center of circle, first lower die
On base plate 26, first lower module, 24 and second lower module 25 is when pipeline is processed for block 24 and the installation of the second lower module 25
It is rotated respectively as the center of circle using the junction of itself and pedestal 26, pedestal 26 is located at the first lower module 24 and the second lower module 25
Lower section be cavity, the surface of the first lower module 24 and the second lower module 25 is semi-circular recesses, the first lower module 24 and second
The end face that lower module 25 is located at 26 middle part of pedestal abuts and at the cambered surface being mutually adapted.The control elbow-punching forming machine is also
Including the second hydraulic press 5 and third hydraulic press 6, the Internal core mould 3 includes upper mold core 31, lower mold core 32, first support bar 33
With second support bar 34, second hydraulic press 5 is connected with first support bar 33, the third hydraulic press 6 and second support bar
34 be connected, which can move along processed pipeline, and upper mold core 31 is resisted against in lower mold core 32, first support bar 33 with
Upper mold core 31 is connected, and first support bar 33 does circumferential turn using the connecting place of itself and upper mold core 31 when pipeline is processed as the center of circle
Dynamic, second support bar 34 is connected with lower mold core 32, being connected with lower mold core 32 with it when pipeline is processed of second support bar 34
Place rotates for the center of circle, and the bottom surface of lower mold core 32 is adapted with the shape of the inner wall of the pipe after processing, and Internal core mould 3 enters
Be processed pipeline, when upper mold core 31 and lower mold core 32 abut, bottom center's line of lower mold core 32 and the first lower module 24 and
The both ends of the surface of second lower module 25 against formed face in the same plane.The control elbow-punching forming machine further includes active face
Plate 7 and limited block 8, the drop front are arranged between upper mounted plate 11 and supporting block 21, and the limited block 8 is arranged in fixation
On strut 12, first hydraulic press 4 is connected with the drop front 7 and can drive 7 oscilaltion of drop front.The support
The side of block 21 is arc concave shape, and the side that first upper module, 22 and second upper module 23 is connected with supporting block 21 is arc
Shape evagination, the arc concave shape are adapted with the shape of the arc evagination.31 left side of the upper mold core is the semicircle with inclined-plane
Column metal derby, the right side of upper mold core 31 are sheet metal, and sheet metal is located at the middle part of metal derby, the upper end of metal derby and sheet metal it is upper
End flushes, and metal derby lower end forms shoulder rank with sheet metal lower end, has through-hole on sheet metal, the outside of sheet metal sets for inclined-plane
Meter, the transition at a right angle of the outside of sheet metal and the lower end of sheet metal.The lower mold core 32 is integral into semi-oval, 32 bottom of lower mold core
Face is ellipse arc, is a square posts on the left of 32 surface of lower mold core, is equipped with through-hole in lug, 32 surface middle part of lower mold core is equipped with
It is respectively provided with groove between on the left of boss, 32 surface middle part boss of lower mold core and 32 surface of lower mold core and on the right side of 32 surface of lower mold core.Institute
The one end for stating first support bar 33 is equipped with connecting hole, and other end top is convex block, and the middle part of lower part and first support bar 33 is shoulder
The middle part of rank transition, convex block is equipped with notch, and convex block is equipped with through-hole, the structure of the first support bar 33 and second support bar 34
It is identical.The bottom plate 13 is being equipped with groove on the direction that pipeline is placed, and 26 bottom surface of the pedestal is equipped with raised line, institute
The shape for stating raised line is adapted with the shape of the groove, and the pedestal 26 can be moved in 13 upper edge groove direction of bottom plate.
Claims (5)
1. a kind of control elbow-punching forming machine, including mounting bracket, cast outer mold structure, Internal core mould, the first hydraulic press, the second liquid
Press and third hydraulic press, the mounting bracket include upper mounted plate, fixed strut and bottom plate, the first hydraulic press peace
In upper mounted plate, it is characterised in that：The cast outer mold structure includes under supporting block, the first upper module, the second upper module, first
Module, the second lower module and pedestal, the supporting block are connected at cylinder, first hydraulic press with supporting block, and described first
Upper module and the second upper module are connected by connection sheet with supporting block respectively is placed in the both sides of supporting block, first upper module
It is semi-circular recesses with the bottom of the second upper module, the first upper module and the second upper module are when pipeline is processed with supporting block
Cross-section center point rotates for the center of circle, and first lower module and the second lower module are mounted on the base, and described first
Lower module and the second lower module are rotated using the junction of itself and pedestal as the center of circle respectively when pipeline is processed, pedestal position
It is cavity in the lower section of the first lower module and the second lower module, the surface of the first lower module and the second lower module is semicircle recessed
The end face that slot, the first lower module and the second lower module are located at the middle of the base abuts and at the cambered surface being mutually adapted, described interior
Core mold includes upper mold core, lower mold core, first support bar and second support bar, second hydraulic press and first support bar phase
Even, the third hydraulic press is connected with second support bar, which can move along processed pipeline, and upper mold core is resisted against down
On mold core, first support bar is connected with upper mold core, and first support bar is with the connecting place of itself and upper mold core when pipeline is processed
The center of circle rotates, and second support bar is connected with lower mold core, and second support bar is when pipeline is processed with itself and lower mold core
Connecting place rotates for the center of circle, and the bottom surface of lower mold core is adapted with the shape of the inner wall of the pipe after processing, Internal core mould into
Enter processed pipeline, when upper mold core and lower mold core abut, under the bottom center's line and the first lower module and second of lower mold core
The both ends of the surface of module are in the same plane, on the left of the upper mold core semicolumn metal derby with inclined-plane against formed face, on
It is sheet metal on the right side of mold core, sheet metal is located at the middle part of metal derby, and the upper end of metal derby is flushed with the upper end of sheet metal, metal derby
Lower end forms shoulder rank with sheet metal lower end, has through-hole on sheet metal, the outside of sheet metal is inclined design, the outside of sheet metal
With the lower end transition at a right angle of sheet metal, for the lower mold core integral into semi-oval, lower mold core bottom surface is ellipse arc, lower mold core
It is a square posts on the left of surface, through-hole is equipped in lug, lower mold core surface middle part is equipped with boss, lower mold core surface middle part boss
It is respectively provided with groove between lower die wicking surface left side and lower die wicking surface right side.
2. a kind of control elbow-punching forming machine according to claim 1, it is characterised in that：Further include drop front and limit
Position block, the drop front are arranged between upper mounted plate and supporting block, and the limited block setting is on fixed strut, and described the
One hydraulic press is connected with the drop front and can drive drop front oscilaltion.
3. a kind of control elbow-punching forming machine according to claim 1 or 2, it is characterised in that：The side of the supporting block
Face is arc concave shape, and the side that first upper module and the second upper module are connected with supporting block is arc evagination, the arc
Shape indent is adapted with the shape of the arc evagination.
4. a kind of control elbow-punching forming machine according to claim 1, it is characterised in that：The one of the first support bar
End is equipped with connecting hole, and other end top is convex block, and the middle part of lower part and first support bar is shoulder rank transition, and the middle part of convex block is equipped with
Notch, convex block are equipped with through-hole, and the first support bar is identical as the structure of second support bar.
5. a kind of control elbow-punching forming machine according to claim 1, it is characterised in that：The bottom plate is vertical
It is equipped with groove in the direction that pipeline is placed, the base end face is equipped with raised line, the shape of the shape of the raised line and the groove
Shape is adapted, and the pedestal can be moved in bottom plate upper edge groove direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610769387.6A CN106345867B (en) | 2016-08-30 | 2016-08-30 | A kind of control elbow-punching forming machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610769387.6A CN106345867B (en) | 2016-08-30 | 2016-08-30 | A kind of control elbow-punching forming machine |
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| Publication Number | Publication Date |
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| CN106345867A CN106345867A (en) | 2017-01-25 |
| CN106345867B true CN106345867B (en) | 2018-10-23 |
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| CN201610769387.6A Active CN106345867B (en) | 2016-08-30 | 2016-08-30 | A kind of control elbow-punching forming machine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321856A (en) * | 2017-08-17 | 2017-11-07 | 徐州徐工施维英机械有限公司 | A kind of hydraulic press bend pipe mould |
| CN109013904B (en) * | 2018-09-04 | 2024-03-19 | 烟台泰利汽车模具股份有限公司 | Hollow tube bending die |
| CN112091640A (en) * | 2020-08-31 | 2020-12-18 | 温州良军电气有限公司 | Processing technology of metal round fastener |
| CN114472702B (en) * | 2022-04-06 | 2022-08-02 | 宁波沃特汽车部件有限公司 | Auxiliary frame hollow pipe forming device and process |
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| CN202606602U (en) * | 2012-05-28 | 2012-12-19 | 浙江海亮股份有限公司 | Elbow pipe bending device |
| CN103658274A (en) * | 2012-09-11 | 2014-03-26 | 北京首宏钢重型装备技术有限公司 | Pipe fitting forming device |
| CN104174764A (en) * | 2014-07-17 | 2014-12-03 | 柳州市楷都汽车零部件有限公司 | Pipe bending mold and pipe bending technology |
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| CN206083512U (en) * | 2016-08-30 | 2017-04-12 | 浙江嘉达机械制造有限公司 | Control elbow punching machine |
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|---|---|---|---|---|
| JPS5935690B2 (en) * | 1981-01-10 | 1984-08-30 | 株式会社日本製鋼所 | Method and device for forming bent pipes |
| JP2011251324A (en) * | 2010-06-03 | 2011-12-15 | Mitsubishi Electric Corp | Method for bending square pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202606602U (en) * | 2012-05-28 | 2012-12-19 | 浙江海亮股份有限公司 | Elbow pipe bending device |
| CN103658274A (en) * | 2012-09-11 | 2014-03-26 | 北京首宏钢重型装备技术有限公司 | Pipe fitting forming device |
| CN104174764A (en) * | 2014-07-17 | 2014-12-03 | 柳州市楷都汽车零部件有限公司 | Pipe bending mold and pipe bending technology |
| CN205253789U (en) * | 2015-11-25 | 2016-05-25 | 胡传榜 | Elbow make -up machine |
| CN206083512U (en) * | 2016-08-30 | 2017-04-12 | 浙江嘉达机械制造有限公司 | Control elbow punching machine |
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| CN106345867A (en) | 2017-01-25 |
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