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 PDF

Info

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
Application number
CN201611257232.0A
Other languages
Chinese (zh)
Other versions
CN106694719A (en
Inventor
慎建民
朱建初
吉海
徐阿敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jiuli Hi Tech Metals Co Ltd
Original Assignee
Zhejiang Jiuli Hi Tech Metals Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Jiuli Hi Tech Metals Co Ltd filed Critical Zhejiang Jiuli Hi Tech Metals Co Ltd
Priority to CN201611257232.0A priority Critical patent/CN106694719B/en
Publication of CN106694719A publication Critical patent/CN106694719A/en
Application granted granted Critical
Publication of CN106694719B publication Critical patent/CN106694719B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06Application 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

One kind behind Coiling Welded Pipe edge curved tooling and after bending method
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.
CN201611257232.0A 2016-12-30 2016-12-30 One kind behind Coiling Welded Pipe edge curved tooling and after bending method Active CN106694719B (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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
CN105268780B (en) The method and apparatus of end for calibration metal 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
CN205733389U (en) A kind of soldering frock of tube sheetbrace angle joint
CN208289197U (en) A kind of solder flux pallet
CN205256977U (en) Steel pipe hexagonal packing frame
CN113560379A (en) Tool for forming and pressing square pipe and using method thereof
CN204657366U (en) A kind of shaped device for forging annulus
CN207509767U (en) Nylon pipe joint clincher tool
CN209007042U (en) A kind of packaged type large-caliber spiral welded pipe units
CN204262567U (en) The built-in bonding pad roll device of middle steel pipes with straight outside weld
CN206464382U (en) A kind of guardrail bending tool set up on compartment board dressing plate
CN109550867A (en) A kind of bending molding process of steel wire both ends fixed ring

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