CN106931244B - Spigot-and-socket steel pipe and its processing method - Google Patents

Spigot-and-socket steel pipe and its processing method Download PDF

Info

Publication number
CN106931244B
CN106931244B CN201511006231.4A CN201511006231A CN106931244B CN 106931244 B CN106931244 B CN 106931244B CN 201511006231 A CN201511006231 A CN 201511006231A CN 106931244 B CN106931244 B CN 106931244B
Authority
CN
China
Prior art keywords
steel pipe
socket
flaring
spigot
rolling
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
CN201511006231.4A
Other languages
Chinese (zh)
Other versions
CN106931244A (en
Inventor
王从水
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.)
Tianjin Jiusheng Tongda Technology Co ltd
Original Assignee
Tianjin Contains Sensible Steel Pipe Science And Technology Ltd For A Long Time
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 Tianjin Contains Sensible Steel Pipe Science And Technology Ltd For A Long Time filed Critical Tianjin Contains Sensible Steel Pipe Science And Technology Ltd For A Long Time
Priority to CN201511006231.4A priority Critical patent/CN106931244B/en
Publication of CN106931244A publication Critical patent/CN106931244A/en
Application granted granted Critical
Publication of CN106931244B publication Critical patent/CN106931244B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00Rigid pipes
    • F16L9/02Rigid pipes of metal
    • F16L9/04Reinforced pipes
    • 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
    • B21D19/00Flanging or other edge treatment, e.g. of tubes
    • B21D19/08Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • 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
    • B21D41/00Application of procedures in order to alter the diameter of tube ends
    • B21D41/02Enlarging
    • 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
    • B21D51/00Making hollow objects
    • B21D51/02Making hollow objects characterised by the structure of the objects

Abstract

The invention discloses a kind of spigot-and-socket steel pipe and its processing methods, including steel pipe (1), one end port of the steel pipe is faucet part (2), the other end port of the steel pipe is socket (3), the faucet part is machined with the first arc transition section (4) successively from the inside to the outside, short tube load section (5), second circular arc transition (6), short tube seal section (7) and the ring baffle (8) at faucet part port, locating slot (9) is machined on the short tube seal section, it is equipped with chamfering at the port of the socket or closes up (10).The invention has the advantages that processing is simple, it is highly practical.

Description

Spigot-and-socket steel pipe and its processing method
Technical field
The present invention relates to pipeline processing technical field, especially a kind of spigot-and-socket steel pipe and its processing method.
Background technology
Bayonet joint is the connection method of generally use, the letter of its structure for larger-diameter pipe of cement and cast iron pipe Single, installation is convenient, effect is high.But that there are compressive resistances is low for pipe of cement and cast iron pipe, and wall thickness is heavy, plasticity and poor toughness Disadvantage causes it in discharge pressure height, should not be used when pipeline is aerial.And steel pipe can overcome pipe of cement and cast iron pipe Disadvantages mentioned above, but for larger diameter steel pipe be connected in site operation then occur some difficulty, because of common welding Flange connection method because operating difficulties or it is of high cost due to be not suitable for.It typically uses and is welded to connect at present, however at the scene Especially underground pipeline construction in construction, welding is very inconvenient, and efficiency is low and quality is difficult to ensure.According to more conveniently socket joint Formula is flexibly connected, then because steel pipe walls are relatively thin, no image of Buddha cast iron pipe is difficult at bell socket by tube end maching with method for turning like that To realize.For this purpose, " spigot-and-socket soft just dual-purpose joint steel pipe and its system of expansion shaped insertion-type that number of patent application is CN00114232.1 Make method " patent application, it is proposed that technique is dilated using (cold working), make steel pipe both ends respectively by mold shape dilate into Special size take the lead and plug, but the structure that the connection is taken the lead only is made of expanding straight pipe and arc transition section, and socket joint is not It surely leans on very much, therefore needs to be welded and fixed connection pipe end sometimes;Taking the lead for steel pipe is required for expansion shaped insertion-type with plug simultaneously, is processed into This is higher;In addition, will produce higher residual stress after expansion shaped insertion-type, mold is also complex, costly.
Invention content
The purpose of the present invention is to solve the above problem, a kind of spigot-and-socket steel pipe and its processing method are devised.
Realize above-mentioned purpose the technical scheme is that, a kind of spigot-and-socket steel pipe, including steel pipe (1), the steel pipe One end port is faucet part (2), and the other end port of the steel pipe is socket (3), and the faucet part adds successively from the inside to the outside Work has the first arc transition section (4), short tube load section (5), the second circular arc transition (6), short tube seal section (7) and is located at bellmouth Ring baffle (8) at portion port is machined with locating slot (9) on the short tube seal section, is equipped at the port of the socket Chamfering closes up (10).
Locating slot (9) longitudinal section is the toroidal cavity structure for bending font.
A kind of processing method of spigot-and-socket steel pipe described in claim 1, this method comprises the following steps:
Steel pipe to be processed is placed in the carriage mechanism of rolling pipe-expanding machine by step 1 first, and the socket of steel pipe is fixed On the position-limit mechanism of rolling flaring machine tail end, then faucet part adjusts rolling flaring against the flaring structure of rolling pipe-expanding machine Machine makes the flaring mechanism of rolling pipe-expanding machine be moved to operating position, so opens power supply, and the first circle is first rolled out by flaring mechanism Then arc transition and short tube load section control flaring mechanism and retreat, readjust flaring mechanism in the first circular arc transition and The second circular arc transition of place and short tube seal section are rolled in the contact of short tube load section again;
Steel pipe after being processed in step 1 is placed in the carriage mechanism of flange film laminator, and makes holding for steel pipe by step 2 Oral area nozzle is placed in the lower die of flange film laminator, is risen the anti-shake support roller of flange film laminator to hold steel pipe, is then started electricity Machine, by the cooperation of the upper and lower mould of flange film laminator, the short tube seal section in steel pipe faucet part nozzle and nozzle end difference Process locating slot and ring baffle;
The socket nozzle end of steel pipe after being processed in step 2 is carried out chamfered edge or shell nosing treatment, obtained by step 3 Spigot-and-socket coupling finished product.
The flaring mechanism is track (12), the electronic supporting plate of installation in orbit by being arranged in rack (11) (13), the column (14) that is fixed on electronic splint upper surface in rack and drives electronic supporting plate along track level The liter that mobile horizontal drive apparatus, the expanding device on column and driving expanding device are moved up and down along column What falling unit collectively formed, the expanding device be by mounted on column rolling pedestal (15), be mounted on rolling In pedestal and rotation axis stretches out what the bistrique (17) of the flaring motor (16) and setting of rolling pedestal on the rotating shaft collectively constituted, The bowl structure of through-hole is provided with centered on the bistrique.
The position-limit mechanism be that by rack-mounted rotation axis (18) and limit on the rotating shaft is fixedly mounted Cover what (19) two parts were constituted.
The carriage mechanism is supporting roller base (20) by being fixed on the rack and a pair on supporting roller base is anti-skidding drags Take turns what (21) two parts were constituted.
The horizontal drive apparatus is by horizontal motor (22) and the drive connection by speed reducer and horizontal motor and drive What horizontal roller screw (23) two parts of dynamic electronic pallets level movement were constituted.
The lifting gear be by mounted on column top lifting motor (24) and in column and pass through deceleration Machine is sequentially connected with lifting motor and the vertical roller screw (25) of rolling pedestal lifting is driven to collectively form.
It is provided with bistrique in the rotation axis of the flaring motor (16), the bistrique is socketed in expansion by the through-hole at its center In the rotation axis of mouth motor, it is designed with keyway on the inner surface of the through-hole and outer surface of rotation axis and is formed by square key Synchronized links.
The spigot-and-socket steel pipe and its processing method made using technical scheme of the present invention, greatly improves spigot-and-socket steel The quality and practical performance of the connector of pipe, improve production efficiency, reduce production cost.
Description of the drawings
Fig. 1 is the structural schematic diagram of spigot-and-socket steel pipe of the present invention;
Fig. 2 is the structural schematic diagram of rolling pipe-expanding machine of the present invention;
In figure, 1, steel pipe;2, faucet part;3, socket;4, the first arc transition section;5, short tube load section;6, the second circle Arc changeover portion;7, short tube seal section;8, ring baffle;9, locating slot;10, chamfering or closing in;11, rack;12, track;13, electric Dynamic supporting plate;14, column;15, pedestal is rolled;16, it is flared motor;17, bistrique;18, rotation axis;19, limited cover;20, supporting roller base; 21, anti-skidding tugboat;22, horizontal motor;23, horizontal roller screw;24, lifting motor;25, vertical roller screw.
Specific implementation mode
The present invention is specifically described below in conjunction with the accompanying drawings, as shown in Figs. 1-2, a kind of spigot-and-socket steel pipe, including steel pipe (1), one end port of the steel pipe is faucet part (2), and the other end port of the steel pipe is socket (3), the faucet part It is machined with the first arc transition section (4), short tube load section (5), the second circular arc transition (6), short tube sealing successively from the inside to the outside Section (7) and the ring baffle (8) at faucet part port is machined with locating slot, the locating slot on the short tube seal section It is inside welded with locating ring (9), chamfering is equipped at the port of the socket or closes up (10).Wherein, the locating slot (7) is vertical cuts Face is the toroidal cavity structure for bending font.
A kind of processing method of spigot-and-socket steel pipe described in claim 1, this method comprises the following steps:
Steel pipe to be processed is placed in the carriage mechanism of rolling pipe-expanding machine by step 1 first, and the socket of steel pipe is fixed On the position-limit mechanism of rolling flaring machine tail end, then faucet part adjusts rolling flaring against the flaring structure of rolling pipe-expanding machine Machine makes the flaring mechanism of rolling pipe-expanding machine be moved to operating position, so opens power supply, and the first circle is first rolled out by flaring mechanism Then arc transition and short tube load section control flaring mechanism and retreat, readjust flaring mechanism in the first circular arc transition and The second circular arc transition of place and short tube seal section are rolled in the contact of short tube load section again;
Steel pipe after being processed in step 1 is placed in the carriage mechanism of flange film laminator, and makes holding for steel pipe by step 2 Oral area nozzle is placed in the lower die of flange film laminator, is risen the anti-shake support roller of flange film laminator to hold steel pipe, is then started electricity Machine, by the cooperation of the upper and lower mould of flange film laminator, the short tube seal section in steel pipe faucet part nozzle and nozzle end difference Process locating slot and ring baffle;
The socket nozzle end of steel pipe after being processed in step 2 is carried out chamfered edge or shell nosing treatment, obtained by step 3 Spigot-and-socket coupling finished product.
The flaring mechanism is track (12), the electronic supporting plate of installation in orbit by being arranged in rack (11) (13), the column (14) that is fixed on electronic splint upper surface in rack and drives electronic supporting plate along track level The liter that mobile horizontal drive apparatus, the expanding device on column and driving expanding device are moved up and down along column What falling unit collectively formed, the expanding device be by mounted on column rolling pedestal (15), be mounted on rolling In pedestal and rotation axis stretches out what the bistrique (17) of the flaring motor (16) and setting of rolling pedestal on the rotating shaft collectively constituted, The bowl structure of through-hole is provided with centered on the bistrique;The position-limit mechanism be by rack-mounted rotation axis (18) and It is fixedly mounted what limited cover (19) two parts on the rotating shaft were constituted;The carriage mechanism is the support roller by being fixed on the rack What seat (20) and anti-skidding tugboat (21) two parts of a pair on supporting roller base were constituted;The horizontal drive apparatus is by level Motor (22) and by the drive connection of speed reducer and horizontal motor and drive the horizontal roller screw of electronic pallets level movement (23) two parts are constituted;The lifting gear be by mounted on column top lifting motor (24) and in the column and It is sequentially connected by speed reducer and lifting motor and the vertical roller screw (25) of rolling pedestal lifting is driven to collectively form;Institute It states and is provided with bistrique in the rotation axis of flaring motor (16), the bistrique is socketed in turning for flaring motor by the through-hole at its center On moving axis, it is designed with keyway on the inner surface of the through-hole and outer surface of rotation axis and synchronized links is formed by square key.
In the technical scheme, steel pipe to be processed is placed on the anti-skidding bracket wheel of carrier structure by staff, so The position-arresting disk limited on tailstock is fixedly connected manually with one end of steel pipe afterwards, completes preparation.Then start control host, Control host computer control flaring mechanism carries out flaring action to port of steel pipe.Its action includes:Horizontal motor passes through speed reducer first Electronic supporting plate action is driven with roller screw, by entire flaring structure horizontal movement to Working position, then stopping acts;Its It is secondary, start lifting gear, lifting motor drives ball-screw to be elevated to specified altitude assignment by pedestal is rolled by speed reducer;Finally, Start flaring motor, flaring motor via reducer driving bistrique carries out flaring action to the port of steel pipe.The flaring action It is to be rotated to squeeze into port of steel pipe in such a way that its side surface is slightly below port of steel pipe lower edge by bistrique, to reach port of steel pipe Flaring purpose, the inner wall of the arcuate flanks of the bistrique and port of steel pipe, which is formed, to be interference fitted, and the bistrique is in flaring motor It drives lower rotation and is advanced slowly under the driving of horizontal motor and squeeze into port of steel pipe, bistrique drives steel pipe together in the process Rotate and slowly squeeze into port of steel pipe, to achieve the purpose that port of steel pipe flaring, the horizontal displacement of the electronic supporting plate and The height of lifting gear lifting carries out all in accordance with control host computer control.
In the technical scheme, the turning over all over molding press of seamless steel pipe, the flange press mold can be used in the flange film laminator The upper die and lower die of machine are all cylinder, and the shape of its side surface and the shape of faucet part locating slot match.
Above-mentioned technical proposal only embodies the optimal technical scheme of technical solution of the present invention, those skilled in the art The principle of the present invention is embodied to some variations that some of which part may be made, belongs to the scope of protection of the present invention it It is interior.

Claims (7)

1. one end port of a kind of processing method of spigot-and-socket steel pipe, including steel pipe (1), the steel pipe is faucet part (2), described The other end port of steel pipe is socket (3), and the faucet part is machined with the first arc transition section (4), short successively from the inside to the outside Pipe load section (5), the second arc transition section (6), short tube seal section (7) and the ring baffle (8) at faucet part port, institute It states and is machined with locating slot (9) on short tube seal section, chamfering is equipped at the port of the socket or closes up (10), it is characterised in that This method comprises the following steps:
Steel pipe to be processed is placed in the carriage mechanism of rolling pipe-expanding machine by step 1 first, and the socket of steel pipe is fixed on rolling On the position-limit mechanism of companding mouth machine tail end, against the flaring structure of rolling pipe-expanding machine, then adjust rolling pipe-expanding machine makes faucet part The flaring mechanism of rolling pipe-expanding machine is moved to operating position, so opens power supply, the first circular arc mistake is first rolled out by flaring mechanism Section and short tube load section are crossed, flaring mechanism is then controlled and retreats, readjust flaring mechanism in the first arc transition section and short tube The second arc transition section of place and short tube seal section are rolled in the contact of load section again;
Steel pipe after being processed in step 1 is placed in the carriage mechanism of flange film laminator, and makes the faucet part of steel pipe by step 2 Nozzle is placed in the lower die of flange film laminator, is risen the anti-shake support roller of flange film laminator to hold steel pipe, is then started motor, is led to The cooperation for crossing the upper and lower mould of flange film laminator, short tube seal section and nozzle end in steel pipe faucet part nozzle are processed respectively Go out locating slot and ring baffle;
The socket nozzle end of steel pipe after being processed in step 2 is carried out chamfered edge or shell nosing treatment, obtains socket joint by step 3 Formula coupling finished product.
2. the processing method of spigot-and-socket steel pipe according to claim 1, which is characterized in that the flaring mechanism is by being arranged Track (12) in rack (11), installation electronic supporting plate (13) in orbit, be fixed on it is vertical on electronic splint upper surface Column (14) in rack and drives horizontal drive apparatus that electronic supporting plate moves horizontally along track, is mounted on column Expanding device and driving expanding device collectively formed along the lifting gear that column moves up and down, the expanding device is By on column rolling pedestal (15), mounted on rolling pedestal in and rotation axis stretch out rolling pedestal flaring motor (16) and it is arranged what bistrique (17) on the rotating shaft collectively constituted, the bowl structure of through-hole is provided with centered on the bistrique.
3. the processing method of spigot-and-socket steel pipe according to claim 1, which is characterized in that the position-limit mechanism be by pacifying What limited cover (19) two parts of rotation axis (18) and fixed installation on the rotating shaft in rack were constituted.
4. the processing method of spigot-and-socket steel pipe according to claim 1, which is characterized in that the carriage mechanism is by fixing What the supporting roller base (20) in rack and anti-skidding tugboat (21) two parts of a pair on supporting roller base were constituted.
5. the processing method of spigot-and-socket steel pipe according to claim 2, which is characterized in that the horizontal drive apparatus be by Horizontal motor (22) and by the drive connection of speed reducer and horizontal motor and drive the horizontal roller bearing of electronic pallets level movement What leading screw (23) two parts were constituted.
6. the processing method of spigot-and-socket steel pipe according to claim 2, which is characterized in that the lifting gear is by installing It in column and is sequentially connected in the lifting motor (24) of column top and by speed reducer and lifting motor and drives rolling What the vertical roller screw (25) of pressure pedestal lifting collectively formed.
7. the processing method of spigot-and-socket steel pipe according to claim 2, which is characterized in that the flaring motor (16) turns Bistrique is provided on moving axis, the bistrique is socketed in by the through-hole at its center in the rotation axis of flaring motor, the through-hole It is designed with keyway on the inner surface and outer surface of rotation axis and synchronized links are formed by square key.
CN201511006231.4A 2015-12-29 2015-12-29 Spigot-and-socket steel pipe and its processing method Active CN106931244B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201511006231.4A CN106931244B (en) 2015-12-29 2015-12-29 Spigot-and-socket steel pipe and its processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201511006231.4A CN106931244B (en) 2015-12-29 2015-12-29 Spigot-and-socket steel pipe and its processing method

Publications (2)

Publication Number Publication Date
CN106931244A CN106931244A (en) 2017-07-07
CN106931244B true CN106931244B (en) 2018-10-30

Family

ID=59457266

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201511006231.4A Active CN106931244B (en) 2015-12-29 2015-12-29 Spigot-and-socket steel pipe and its processing method

Country Status (1)

Country Link
CN (1) CN106931244B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109894873B (en) * 2019-04-11 2023-12-01 开平力蒲卫浴有限公司 Sewer pipeline production device and application method thereof
CN110005885A (en) * 2019-04-29 2019-07-12 湖南振辉管业有限公司 A kind of enhanced steel pipe of bellmouth and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1048445A (en) * 1989-06-30 1991-01-09 蓬塔穆松公司 The sealing gasket of leakproof locked joints
CN1274060A (en) * 2000-02-16 2000-11-22 程宇鸣 Expansion shaped insertion-type steel tubes for both flexible and rigid joining and its manufacture technology
CN1374472A (en) * 2002-02-06 2002-10-16 湖州金洲管业有限公司 Spigot and socket joint steel pipe and its manufacture
CN2637866Y (en) * 2003-08-29 2004-09-01 陈阵 Insertion type pipe adapter
US20090173130A1 (en) * 2008-01-04 2009-07-09 Cerro Flow Products, Inc. Fluid conduits with integral end fittings and associated methods of manufacture and use

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1048445A (en) * 1989-06-30 1991-01-09 蓬塔穆松公司 The sealing gasket of leakproof locked joints
CN1274060A (en) * 2000-02-16 2000-11-22 程宇鸣 Expansion shaped insertion-type steel tubes for both flexible and rigid joining and its manufacture technology
CN1374472A (en) * 2002-02-06 2002-10-16 湖州金洲管业有限公司 Spigot and socket joint steel pipe and its manufacture
CN2637866Y (en) * 2003-08-29 2004-09-01 陈阵 Insertion type pipe adapter
US20090173130A1 (en) * 2008-01-04 2009-07-09 Cerro Flow Products, Inc. Fluid conduits with integral end fittings and associated methods of manufacture and use

Also Published As

Publication number Publication date
CN106931244A (en) 2017-07-07

Similar Documents

Publication Publication Date Title
CN202985355U (en) Sandblast equipment for aluminum alloy wheel hub mold
CN103692646B (en) A kind of PVC heavy caliber pipe-expanding machine
CN106931244B (en) Spigot-and-socket steel pipe and its processing method
CN204657307U (en) Spigot-and-socket steel pipe roll extrusion pipe-expanding machine
CN204700193U (en) Automatic pipe winding machine
CN100415416C (en) On-line mould-repairing method and apparatus for roller-type wedge transverse rolling machine
CN103316950B (en) Spinning forming device for large-diameter thin-walled pipes and application method thereof
CN105349759A (en) Composite material conveyer pipe inner and outer walls synchronous quench machining tool
CN108188220B (en) Spiral steel pipe tune type auxiliary system and auxiliary shape adjusting method
CN203621174U (en) Automatic blower flanger
CN107812842A (en) Large-diameter steel pipe port enlarging link gear, equipment and production combination line
CN204848638U (en) Glass cup automatic processing equipment
CN219212067U (en) Adjustable tower welding platform
CN105414224A (en) Pointing device used for rolling mill production system
CN210475066U (en) Qualitative forming equipment for automobile steel pipe production line
CN207357865U (en) One kind feedwater steel pipe spigot-and-socket flexible connection channelling machine
CN203599295U (en) Full-variable-pitch straightener lifting device
CN104858280B (en) Flange flanging machine
CN204054635U (en) A kind of braiding polyethylene pipe whirligig
CN106623570A (en) Adjustable rolling forming equipment
CN207632435U (en) A kind of underground pipe gallery handling device
CN205363157U (en) Clearance roll extrusion anchor clamps of automobile axle shell and beaded finish
CN201544340U (en) Double-block type rail bearing completed product demoulding semiautomatic turning over machine
CN101733612A (en) Lead alloy battery post terminal lead sheath surface rolling deformation modified device and method
CN103521525A (en) Mandrel operating device for tube rolling mill

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 300 000 meters north of Sidangkou Houcun Village, Caigongzhuang Town, Jinghai District, Tianjin

Patentee after: TIANJIN JIUSHENG TONGDA TECHNOLOGY CO.,LTD.

Address before: 300 000 meters west of Hulianzhuang Village, Daqiuzhuang Town, Jinghai County, Tianjin

Patentee before: TIANJIN JIUSHENG TONGDA STEEL PIPE TECHNOLOGY CO.,LTD.

CP02 Change in the address of a patent holder
CP02 Change in the address of a patent holder

Address after: No. 2 Guangyuan Road, Tangguantun Processing and Logistics Zone, Jinghai District, Tianjin, 300000

Patentee after: TIANJIN JIUSHENG TONGDA TECHNOLOGY CO.,LTD.

Address before: 300 000 meters north of Sidangkou Houcun Village, Caigongzhuang Town, Jinghai District, Tianjin

Patentee before: TIANJIN JIUSHENG TONGDA TECHNOLOGY CO.,LTD.