CN106694719B - One kind behind Coiling Welded Pipe edge curved tooling and after bending method - Google Patents
One kind behind Coiling Welded Pipe edge curved tooling and after bending method Download PDFInfo
- Publication number
- CN106694719B CN106694719B CN201611257232.0A CN201611257232A CN106694719B CN 106694719 B CN106694719 B CN 106694719B CN 201611257232 A CN201611257232 A CN 201611257232A CN 106694719 B CN106694719 B CN 106694719B
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- inner membrance
- external mold
- top shoe
- outer die
- 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.)
- Active
Links
Classifications
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
One kind behind Coiling Welded Pipe edge curved tooling and after bending method, belong to metal plate processing unit (plant) technical field, the inner membrance is set between external mold and lower external mold；The upper surface evagination of the inner membrance is formed above the inner membrance of arcuation, and the lower surface evagination of the inner membrance is formed below the inner membrance of arcuation；The inner membrance is fixed on inner membrance connecting rod；The inner membrance connecting rod is horizontally disposed, and both ends are arranged in connecting rod lantern ring；Connecting rod connecting plate bottom end connects inner membrance connecting rod by connecting rod lantern ring, and top is fixedly installed in connecting rod bottom；The small end is by connecting top shoe by connecting rod fixed block；The upper external mold is fixed on top shoe bottom center, and the bottom surface of upper external mold is recessed the upper outer die face of arcuation；The lower external mold is located at immediately below inner membrance, and lower external mold upper surface is recessed the lower outer die face of arcuation.This tooling is deformed it by the compacting to " straight section ", reaches steel pipe roundness requirement.
Description
Technical field
The invention belongs to metal plate processing unit (plant) technical fields, and in particular to for a kind of tooling curved behind Coiling Welded Pipe edge with
And rear bending method.
Background technique
The production of single Zhi Gangguan is generally realized using rolling machine, but rolling machine production has certain limitation, such as wall
Thick, length, for heavy wall and requires length, such as length is 12 meters, then generallys use " JC " forming process.
In the bending process of steel plate, the region that there is one section of 1.5-3 times of wall thickness at edge is theoretically " JC " forming process
It can not deform, referred to as " straight section ", if retaining this region, the steel pipe after processing forms so-called " peach point ".
To eliminate this phenomenon, one of the methods is cut edge processing will be carried out after steel plate forming, and in manual methods by edge
Then reconditioning carries out the subsequent handling such as welding.This method not only wastes raw material, but also time-consuming and laborious, some special steels
Kind does not allow this processing method yet.
Summary of the invention
It is an object of the invention to overcome defect and deficiency mentioned above, and provide a kind of work curved behind Coiling Welded Pipe edge
Dress.
Another object of the present invention is to provide one kind behind Coiling Welded Pipe edge bending method.
The present invention realizes its purpose, and the technical solutions adopted are as follows.
One kind curved tooling behind Coiling Welded Pipe edge, including the connection of top shoe, connecting rod fixed block, connecting rod, upper external mold, connecting rod
Plate, connecting rod lantern ring, inner membrance connecting rod, inner membrance, lower external mold；The inner membrance is set between external mold and lower external mold；The inner membrance
Upper surface evagination is formed above the inner membrance of arcuation, and the lower surface evagination of the inner membrance is formed below the inner membrance of arcuation；The inner membrance
It is fixed on inner membrance connecting rod；The inner membrance connecting rod is horizontally disposed, and both ends are arranged in connecting rod lantern ring；Connecting rod connecting plate bottom end passes through
Connecting rod lantern ring connects inner membrance connecting rod, and top is fixedly installed in connecting rod bottom；The small end by connecting rod fixed block by being connected
Connect sliding block；The upper external mold is fixed on top shoe bottom center, and the bottom surface of upper external mold is recessed the upper outer die face of arcuation；Institute
It states lower external mold to be located at immediately below inner membrance, and lower external mold upper surface is recessed the lower outer die face of arcuation.
The diameter of the upper outer die face is slightly larger than the diameter above inner membrance；Diameter below the inner membrance is equal to above inner membrance
Diameter；The diameter of the lower outer die face is slightly larger than the diameter below inner membrance.
The top shoe two sides are equipped with the lifting support for erectting setting；The lifting support top is fixedly connected with top
Seat；The footstock is fixed with oil hydraulic cylinder；The output end of the oil hydraulic cylinder connects top shoe；The lifting support bottom end connects bottom
Seat；The fixed lower external mold of the upper face center of the pedestal.
The connecting rod is round bar；The connecting rod fixed block is fixedly welded on the middle part in top shoe rear and front end face；The company
Bar erects setting, and upper end passes through connecting rod fixed block rear thread and is connected with nut；The connecting rod is slidably connected with connecting rod fixed block.
The connecting rod connecting plate is surface plate, and upper end and connecting rod weld, and lower end and connecting rod lantern ring weld；The connecting rod connection
The axle center of plate and inner membrance is generally aligned in the same plane.
The connecting rod lantern ring is in hollow cylindric；The inner membrance connecting rod two end is arranged in connecting rod lantern ring；The connecting rod set
Ring is threaded with rod set tight fixed bolt；Rod set tight fixed bolt end contacts inner membrance connecting rod.
The inner membrance is symmetrical around the eccentric axial of inner membrance；It is plane at left and right sides of the inner membrance.
The surface of the upper outer die face is covered with one layer of elastic layer；Surface below the inner membrance surface above and inner membrance
It is all covered with one layer of elastic layer；The surface of the lower outer die face is all covered with one layer of elastic layer.
Bending method after a kind of tooling curved behind Coiling Welded Pipe edge, includes the following steps：
Step 1, will have already passed through bending and pipe annular in shape is sheathed on outside inner membrance, and by the opening of pipe
It is arranged upward, between the edge straight section of pipe is located above upper outer die face and inner membrance；
Step 2, oil hydraulic cylinder movement, pushes top shoe along lifting support downlink, upper external mold and the equal DL synchronization of inner membrance,
Pipe bottom end touches inner membrance after lower external mold and stops downlink, the connecting rod and connecting rod fixed block is opposite slides, the nut on connecting rod with
Connecting rod fixed block is separated；Top shoe continues traveling downwardly, and upper external mold and inner membrance generate relative movement, until upper external mold is by the side of pipe
Between edge straight section is located in above outer die face and inner membrance and kept for a period of time；
Step 3, oil hydraulic cylinder movement push top shoe to be detached from along lifting support uplink, upper external mold uplink and with inner membrance,
Then, the connecting rod and the opposite sliding of connecting rod fixed block, after the nut on connecting rod is mutually contacted with connecting rod fixed block, top shoe
Inner membrance uplink synchronization is pulled by connecting rod；Inner membrance and lower external mold are detached from, and complete the compacting of the edge straight section of pipe.
This tooling solves the problems, such as " peach point " in more economical mode, traditional cut edge treatment process is eliminated, using general
The existing steel pipe full circle equipment of pipe enterprise, such as：Four-column hydraulic press is deformed it by the compacting to " straight section ",
Reach steel pipe roundness requirement.
Detailed description of the invention
Fig. 1 is the main view of this tooling；
Fig. 2 is the side view of this tooling；
In figure：Top shoe 1, connecting rod fixed block 2, connecting rod 3, upper external mold 4, connecting rod connecting plate 5, connecting rod lantern ring 6, inner membrance connecting rod
7, inner membrance 8, lower external mold 9, lifting support 10, footstock 11, oil hydraulic cylinder 12, pedestal 13, rod set tight fixed bolt 14, pipe 15.
Specific embodiment
With reference to the accompanying drawing, invention is further described in detail.
One kind curved tooling behind Coiling Welded Pipe edge, including top shoe 1, connecting rod fixed block 2, connecting rod 3, upper external mold 4, connecting rod connect
Fishplate bar 5, connecting rod lantern ring 6, inner membrance connecting rod 7, inner membrance 8, lower external mold 9；The inner membrance 8 is set between external mold 4 and lower external mold 9；
The upper surface evagination of the inner membrance 8 is formed above the inner membrance of arcuation, and the lower surface evagination of the inner membrance 8 is formed under the inner membrance of arcuation
Face；The inner membrance 8 is fixed on inner membrance connecting rod 7；The inner membrance connecting rod 7 is horizontally disposed, and both ends are arranged in connecting rod lantern ring 6；The company
5 bottom end of bar connecting plate connects inner membrance connecting rod 7 by connecting rod lantern ring 6, and top is fixedly installed in 3 bottom of connecting rod；3 upper end of connecting rod
By connecting top shoe 1 by connecting rod fixed block 2；The upper external mold 4 is fixed on 1 bottom center of top shoe, the bottom surface of upper external mold 4
It is recessed the upper outer die face of arcuation；The lower external mold 9 is located at immediately below inner membrance 8, and 9 upper surface of lower external mold is recessed arcuation
Lower outer die face.
The diameter R1 of the upper outer die face is slightly larger than the diameter R2 above inner membrance；Diameter R3 below the inner membrance is equal to interior
Diameter R2 above film；The diameter R4 of the lower outer die face is slightly larger than the diameter R3 below inner membrance.Preferably, the ratio of R1/R2
The ratio that value is 105% ~ 110%, R4/R3 is 105% ~ 110%.The diameter R1 of upper outer die face is slightly larger than the diameter R2 above inner membrance,
To overcome the rebound of material.
1 two sides of top shoe are equipped with the lifting support 10 for erectting setting；10 top of lifting support is fixed to be connected
Connect footstock 11；The footstock 11 is fixed with oil hydraulic cylinder 12；The output end of the oil hydraulic cylinder 12 connects top shoe 1；The lifting branch
10 bottom end of column connects pedestal 13；The fixed lower external mold 9 of the upper face center of the pedestal 13.This tooling, using general pipe enterprise
Existing steel pipe full circle equipment.This tooling can be easily mounted in existing equipment, and complete content required by technique.
The connecting rod 3 is round bar；The connecting rod fixed block 2 is fixedly welded on the middle part in 1 rear and front end face of top shoe；It is described
Connecting rod 3 erects setting, and upper end passes through 2 rear thread of connecting rod fixed block and is connected with nut；The connecting rod 3 is slided with connecting rod fixed block 2
Connection.
The connecting rod connecting plate 5 is surface plate, and upper end and connecting rod 3 weld, and lower end and connecting rod lantern ring 6 weld；The connecting rod
The axle center of connecting plate 5 and inner membrance 8 is generally aligned in the same plane.Connecting rod is connected as surface plate, to increase the bonding area with connecting rod lantern ring,
And enough bending strengths are provided, prevent inner membrance from rotating so that connecting rod connection bending.
Tooling curved behind Coiling Welded Pipe edge as described in claim 1 a kind of, which is characterized in that the connecting rod lantern ring 6 is in
Hollow is cylindric；7 both ends of inner membrance connecting rod are arranged in connecting rod lantern ring 6；The connecting rod lantern ring 6 is threaded with rod set tightening
Bolt 14；14 end of rod set tight fixed bolt contacts inner membrance connecting rod 7 after passing through 6 outer wall of connecting rod lantern ring.
The inner membrance 8 is symmetrical around the eccentric axial of inner membrance 8；The left and right sides of the inner membrance 8 is plane.8 two sides of inner membrance
To accommodate pipe 15.
The surface of the upper outer die face is covered with one layer of elastic layer；Surface below the inner membrance surface above and inner membrance
It is all covered with one layer of elastic layer；The surface of the lower outer die face is all covered with one layer of elastic layer.Preferably, the elastic layer tool
There is the soft material of certain elasticity, it is preferred to use conventional Belt Conveying rubber strip generates damage when preventing steel tube surface from suppressing.
Bending method after a kind of tooling curved behind Coiling Welded Pipe edge, which is characterized in that include the following steps：
Step 1, will have already passed through bending and pipe 15 annular in shape is sheathed on outside inner membrance 8, and opening pipe 15
It is arranged upward at mouthful, between the edge straight section of pipe 15 is located above upper outer die face and inner membrance；
Step 2, oil hydraulic cylinder 12 act, and push top shoe 1 along 10 downlink of lifting support, and upper external mold 4 and inner membrance 8 are same
Downlink is walked, inner membrance 8 stops downlink, the connecting rod 3 and the opposite sliding of connecting rod fixed block 2 after 15 bottom end of pipe touches lower external mold 9, even
Nut on bar 3 is separated with connecting rod fixed block 2；Top shoe 1 continues traveling downwardly, and upper external mold 4 and inner membrance 8 generate relative movement, directly
To upper external mold 4 by the edge straight section of pipe 15 be located in above upper outer die face and inner membrance between and keep a period of time；
Step 3, oil hydraulic cylinder 12 act, and push top shoe 1 along 10 uplink of lifting support, upper 4 uplink of external mold and and inner membrance
8 are detached from, and then, the connecting rod 3 and connecting rod fixed block 2 are opposite to be slided, until on connecting rod 3 nut and 2 phase top of connecting rod fixed block
After touch, top shoe 1 pulls 8 uplink synchronization of inner membrance by connecting rod 3；Inner membrance 8 and lower external mold 9 are detached from, and the edge for completing pipe 15 is straight
The compacting of side section.
The present invention is illustrated according to embodiment, under the premise of not departing from present principles, if the present apparatus can also make
Dry modification and improvement.It should be pointed out that it is all using modes technical solutions obtained such as equivalent substitution or equivalent transformations, all fall within this
In the protection scope of invention.
Claims (9)
1. a kind of tooling curved behind Coiling Welded Pipe edge, which is characterized in that including top shoe（1）, connecting rod fixed block（2）, connecting rod
（3）, upper external mold（4）, connecting rod connecting plate（5）, connecting rod lantern ring（6）, inner membrance connecting rod（7）, inner membrance（8）, lower external mold（9）；In described
Film（8）It is set to external mold（4）With lower external mold（9）Between；The inner membrance（8）Upper surface evagination formed arcuation inner membrance on
Face, the inner membrance（8）Lower surface evagination formed arcuation inner membrance below；The inner membrance（8）It is fixed on inner membrance connecting rod（7）；Institute
State inner membrance connecting rod（7）Horizontally disposed, both ends are arranged in connecting rod lantern ring（6）；The connecting rod connecting plate（5）Bottom end passes through connecting rod lantern ring
（6）Connect inner membrance connecting rod（7）, top is fixedly installed in connecting rod（3）Bottom；The connecting rod（3）Upper end passes through connecting rod fixed block（2）
Connect top shoe（1）；The upper external mold（4）It is fixed on top shoe（1）Bottom center, upper external mold（4）Bottom surface be recessed arc
The upper outer die face of shape；The lower external mold（9）Positioned at inner membrance（8）Underface, and lower external mold（9）Upper surface is recessed under arcuation
Outer die face.
2. a kind of tooling curved behind Coiling Welded Pipe edge as described in claim 1, which is characterized in that the diameter of the upper outer die face
Slightly larger than the diameter above inner membrance；Diameter below the inner membrance is equal to the diameter above inner membrance；The diameter of the lower outer die face
Slightly larger than the diameter below inner membrance.
3. a kind of tooling curved behind Coiling Welded Pipe edge as described in claim 1, which is characterized in that the top shoe（1）Two sides
It is equipped with the lifting support for erectting setting（10）；The lifting support（10）Top is fixedly connected with footstock（11）；The footstock
（11）It is fixed with oil hydraulic cylinder（12）；The oil hydraulic cylinder（12）Output end connect top shoe（1）；The lifting support（10）Bottom end
Connect pedestal（13）；The pedestal（13）The fixed lower external mold of upper face center（9）.
4. a kind of tooling curved behind Coiling Welded Pipe edge as claimed in claim 3, which is characterized in that the connecting rod（3）For round bar；
The connecting rod fixed block（2）It is fixedly welded on top shoe（1）The middle part in rear and front end face；The connecting rod（3）Erect setting, upper end
Across connecting rod fixed block（2）Rear thread is connected with nut；The connecting rod（3）With connecting rod fixed block（2）It is slidably connected.
5. a kind of tooling curved behind Coiling Welded Pipe edge as claimed in claim 4, which is characterized in that the connecting rod connecting plate（5）
For surface plate, upper end and connecting rod（3）Welding, lower end and connecting rod lantern ring（6）Welding；The connecting rod connecting plate（5）And inner membrance（8）'s
Axle center is generally aligned in the same plane.
6. a kind of tooling curved behind Coiling Welded Pipe edge as described in claim 1, which is characterized in that the connecting rod lantern ring（6）It is in
Hollow is cylindric；The inner membrance connecting rod（7）Both ends are arranged in connecting rod lantern ring（6）；The connecting rod lantern ring（6）It is threaded with bar
Cover tight fixed bolt（14）；The rod set tight fixed bolt（14）End contacts inner membrance connecting rod（7）.
7. a kind of tooling curved behind Coiling Welded Pipe edge as described in claim 1, which is characterized in that the inner membrance（8）Around inner membrance
（8）Eccentric axial it is symmetrical；The inner membrance（8）The left and right sides be plane.
8. a kind of tooling curved behind Coiling Welded Pipe edge as claimed in claim 2, which is characterized in that the surface of the upper outer die face
It is covered with one layer of elastic layer；Surface below the inner membrance surface above and inner membrance is all covered with one layer of elastic layer；Under described
The surface of outer die face is all covered with one layer of elastic layer.
9. using bending method after a kind of tooling curved behind Coiling Welded Pipe edge as claimed in claim 4, which is characterized in that including
Following steps：
Step 1 will have already passed through bending and pipe annular in shape（15）It is sheathed on inner membrance（8）Outside, and by pipe（15）'s
Opening is arranged upward, pipe（15）Edge straight section be located above upper outer die face and inner membrance between；
Step 2, oil hydraulic cylinder（12）Movement pushes top shoe（1）Along lifting support（10）Downlink, upper external mold（4）And inner membrance
（8）Equal DL synchronization, pipe（15）Bottom end touches lower external mold（9）Inner membrance afterwards（8）Stop downlink, the connecting rod（3）It is solid with connecting rod
Determine block（2）Opposite sliding, connecting rod（3）On nut and connecting rod fixed block（2）It is separated；Top shoe（1）It continues traveling downwardly, upper external mold
（4）And inner membrance（8）Relative movement is generated, until upper external mold（4）By pipe（15）Edge straight section be located in outer die face and
Between above inner membrance and kept for a period of time；
Step 3, oil hydraulic cylinder（12）Movement pushes top shoe（1）Along lifting support（10）Uplink, upper external mold（4）Uplink and with
Inner membrance（8）It is detached from, then, the connecting rod（3）With connecting rod fixed block（2）Opposite sliding, until connecting rod（3）On nut and connecting rod
Fixed block（2）After mutually contacting, top shoe（1）Pass through connecting rod（3）Pull inner membrance（8）Uplink synchronization；Inner membrance（8）With lower external mold（9）
It is detached from, completes pipe（15）Edge straight section compacting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611257232.0A CN106694719B (en) | 2016-12-30 | 2016-12-30 | One kind behind Coiling Welded Pipe edge curved tooling and after bending method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611257232.0A CN106694719B (en) | 2016-12-30 | 2016-12-30 | One kind behind Coiling Welded Pipe edge curved tooling and after bending method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106694719A CN106694719A (en) | 2017-05-24 |
| CN106694719B true CN106694719B (en) | 2018-11-20 |
Family
ID=58905250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611257232.0A Active CN106694719B (en) | 2016-12-30 | 2016-12-30 | One kind behind Coiling Welded Pipe edge curved tooling and after bending method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106694719B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006306248A (en) * | 2005-04-28 | 2006-11-09 | Showa Denko Kk | Steering support beam and manufacturing method thereof |
| CN102164691A (en) * | 2008-09-25 | 2011-08-24 | 杰富意钢铁株式会社 | Method of manufacturing closed structural member, press-forming device, and closed structural member |
| CN202316812U (en) * | 2011-11-14 | 2012-07-11 | 安徽省天旭茶业有限公司 | Joint sealing die for tea packaging tank |
| CN104174693A (en) * | 2014-08-07 | 2014-12-03 | 浙江兄弟之星汽配有限公司 | Board round tube molding method and board round tube molding mould |
| CN104548632A (en) * | 2013-10-18 | 2015-04-29 | 南通中集罐式储运设备制造有限公司 | Tubular film distributor with window and processing method and equipment of tubular film distributor |
| CN206604961U (en) * | 2016-12-30 | 2017-11-03 | 浙江久立特材科技股份有限公司 | One kind treats Coiling Welded Pipe edge palintrope frock |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56109111A (en) * | 1980-02-01 | 1981-08-29 | Nisshin Steel Co Ltd | Remover for internal bead of welded pipe |
-
2016
- 2016-12-30 CN CN201611257232.0A patent/CN106694719B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006306248A (en) * | 2005-04-28 | 2006-11-09 | Showa Denko Kk | Steering support beam and manufacturing method thereof |
| CN102164691A (en) * | 2008-09-25 | 2011-08-24 | 杰富意钢铁株式会社 | Method of manufacturing closed structural member, press-forming device, and closed structural member |
| CN202316812U (en) * | 2011-11-14 | 2012-07-11 | 安徽省天旭茶业有限公司 | Joint sealing die for tea packaging tank |
| CN104548632A (en) * | 2013-10-18 | 2015-04-29 | 南通中集罐式储运设备制造有限公司 | Tubular film distributor with window and processing method and equipment of tubular film distributor |
| CN104174693A (en) * | 2014-08-07 | 2014-12-03 | 浙江兄弟之星汽配有限公司 | Board round tube molding method and board round tube molding mould |
| CN206604961U (en) * | 2016-12-30 | 2017-11-03 | 浙江久立特材科技股份有限公司 | One kind treats Coiling Welded Pipe edge palintrope frock |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106694719A (en) | 2017-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105382545A (en) | Production equipment and technique for plate-strip dual-use continuous production straight-slit submerged-arc welded pipes | |
| CN103084427A (en) | Manufacturing method of hardenability steel tube | |
| CN206366571U (en) | A kind of efficient medium plate end pre-bending building mortion | |
| CN105798079B (en) | A kind of bending apparatus for correcting | |
| CN105108458A (en) | Method for manufacturing unequal thickness steel pipe | |
| CN106694719B (en) | One kind behind Coiling Welded Pipe edge curved tooling and after bending method | |
| US20130239642A1 (en) | Production line of large diameter longitudinal welded pipe | |
| CN206604961U (en) | One kind treats Coiling Welded Pipe edge palintrope frock | |
| CN105945503A (en) | Round pipe welding clamp | |
| CN205967984U (en) | Device is used in welding of hydraulic pressure slidingtype corundum wear -resistant pipeline flange | |
| CN206588545U (en) | A kind of Precision Welded Pipe profiling jig | |
| CN206527178U (en) | A kind of Straight Welded Pipe welding production line | |
| CN207770542U (en) | A kind of bending die tool of connector wire bushing barrel part | |
| JP2852316B2 (en) | Method of manufacturing large-diameter rectangular steel pipe for improving material quality and uniform shape at corner R | |
| CN208437452U (en) | A kind of adjustable high connection liner pipe forming machine easily carried | |
| CN206464382U (en) | A kind of guardrail bending tool set up on compartment board dressing plate | |
| CN205733389U (en) | A kind of soldering frock of tube sheetbrace angle joint | |
| CN208289197U (en) | A kind of solder flux pallet | |
| CN204847813U (en) | Hoisting apparatus | |
| CN205256977U (en) | Steel pipe hexagonal packing frame | |
| CN113560379A (en) | Tool for forming and pressing square pipe and using method thereof | |
| CN211866244U (en) | Correcting device for welding seam horn mouth of large-diameter thin-wall coiled pipe | |
| CN204657366U (en) | A kind of shaped device for forging annulus | |
| CN207509767U (en) | Nylon pipe joint clincher tool | |
| CN102784811A (en) | Combined roller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |