CN116276071A - Wire blank butt welding method - Google Patents

Wire blank butt welding method Download PDF

Info

Publication number
CN116276071A
CN116276071A CN202310246464.XA CN202310246464A CN116276071A CN 116276071 A CN116276071 A CN 116276071A CN 202310246464 A CN202310246464 A CN 202310246464A CN 116276071 A CN116276071 A CN 116276071A
Authority
CN
China
Prior art keywords
wire blank
butt welding
blank coil
rotating
wire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310246464.XA
Other languages
Chinese (zh)
Inventor
孙刚峰
冯焕锋
马为民
赵能
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 Hailiang Co Ltd
Original Assignee
Zhejiang Hailiang 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 Hailiang Co Ltd filed Critical Zhejiang Hailiang Co Ltd
Priority to CN202310246464.XA priority Critical patent/CN116276071A/en
Publication of CN116276071A publication Critical patent/CN116276071A/en
Priority to CN202380010549.6A priority patent/CN117794681A/en
Priority to US18/242,191 priority patent/US11925997B1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P23/00Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
    • 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
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02Stamping using rigid devices or tools
    • 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
    • B21D43/00Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02Carriages for supporting the welding or cutting element
    • B23K37/0252Steering means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426Fixtures for other work
    • B23K37/0435Clamps
    • B23K37/0443Jigs
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

In order to solve the problems of large labor capacity, safety risk and low working efficiency of wire blank butt welding in the prior art, the invention provides a wire blank butt welding method, which comprises the following steps: s1: preparing materials; s2: rotating the welding machine to a material station, and feeding the 1# wire blank coil material to a material receiving rod of the welding machine; s3: the tail part of the 1# wire blank coil material is welded with the head part of the 2# wire blank coil material on the rotary charging tray at a butt welding station; s4: synchronously rotating the welding machine and the No. 2 wire blank coil stock to a material station; s5, performing S5; the material receiving rod rotates to tighten the wire blank between the wire blank coil material 1# and the wire blank coil material 2 #; s6: repeating the steps S3-S5 to finish the butt welding operation of the 3# -n # wire blank coil material. By adopting the butt welding method, semi-automatic butt welding operation is realized, automatic feeding, automatic turning and automatic discharging can be realized by rotating the material tray and the butt welding machine, the manual labor is reduced, the safety risk is reduced, and the production efficiency is improved.

Description

Wire blank butt welding method
Technical Field
The invention belongs to the technical field of wire blank welding, and particularly relates to a wire blank butt welding method.
Background
In the production process of pipe fittings or wire blanks, in order to obtain continuous wire blanks with enough length, the ends of the wire blanks with different sections are often required to be connected in butt welding mode, the ends of two coil-shaped wire blanks are welded manually in the production process at present, after the wire blank coiled materials of two different coils are formed into a coil through manual overturning, the next welding is carried out, because the weight of the wire blank coiled materials is generally large and easy to loosen, the labor intensity is high in the manual overturning process, and safety accidents are easy to cause.
It can be seen that the conventional wire blank butt welding method has low production efficiency, high labor intensity and safety risk, so that a new wire blank butt welding method is necessary.
Disclosure of Invention
In order to solve the problems of large welding labor amount, safety risk and low working efficiency of wire blanks in the prior art, the invention provides a wire blank butt welding method, which can automatically rotate coiled materials to be welded by rotating a material tray, automatically rotate the welded wire blank coiled materials by a welding machine, so that the wire blanks with loose welding positions between the two coiled materials are tightened to form an integral material tray, the automation degree is high, and the working efficiency is improved.
The invention provides a wire blank butt welding method, which solves the technical problems and comprises the following steps:
s1: a plurality of wire blank coil materials (1 # -n#) with uniformly distributed circumferences are placed on a rotary material tray in advance;
s2: rotating the welding machine to a material station, and feeding the 1# wire blank coil material to a material receiving rod of the welding machine;
s3: the welding machine rotates the 1# wire blank coil to a welding station, and the tail of the 1# wire blank coil is welded with the head of the 2# wire blank coil on the rotating tray;
s4: rotating the welding machine to a material receiving station again, rotating the material disc for 360/n degrees, and rotating the No. 2 wire blank coil material to the material receiving station;
s5, performing S5; after the wire blank between the wire blank coil stock 1 and the wire blank coil stock 2 is tightened by rotating the material receiving rod, the wire blank coil stock 2 is sent to the material receiving rod of the welding machine by rotating the material tray;
s6: repeating the steps S3-S5 to finish butt welding operation of the 3# -n # wire blank coil material sequentially;
s7: and (3) rotating the welding machine to a blanking station, and blanking the whole 1# n wire blank coil material with the butt welding connection completed.
By adopting the butt welding method, semi-automatic butt welding operation is realized, automatic feeding, automatic turning and automatic discharging can be realized by rotating the material tray and the butt welding machine, the manual labor is reduced, the safety risk is reduced, the production efficiency is improved, and continuous welding of heavy coil stock is realized.
Preferably, a pushing mechanism is arranged at the central part of the rotary tray, the pushing mechanism comprises a pushing rod and a pushing driving part, one end of the pushing rod faces to the receiving station, and the pushing driving part drives the pushing rod to intermittently stretch and retract. The pushing structure can automatically send the wire blank coil stock on the rotary material disc to the butt welding machine, so that the manual labor is reduced, and the continuous butt welding connection is ensured.
Preferably, in the step S3, the head and tail portions of the coil stock are removed before the coil stock is welded. Because the end heads of the wire blank coil stock generally have an oxide layer, the welding quality can be affected, and before butt welding is carried out, the end heads of the two wire blank coil stock are required to be removed, so that the reliability of welding connection is ensured.
Preferably, the butt welding station and the blanking station are distributed on two sides of the blanking station. The arrangement mode can reduce the transfer formation of materials among different stations in the whole operation process, and improves the production efficiency.
Preferably, the number n of the wire blank coil stock is 4, 5 or 6. The number of the coil stock of the wire blank can be set to different numbers according to production requirements, and the production is more flexible.
Preferably, the receiving rod comprises two rod bodies which are arranged at intervals in parallel, and the two rod bodies are mutually independent and can synchronously rotate around the axis of the receiving rod. The material receiving rod is inserted into the inner hole of the wire blank coil stock, and when the wire blank coil stock is turned over, the wire blank coil stock is automatically turned over by friction with the inner wall of the wire blank coil stock, so that loose wire blanks in the welding process between two wire reels are automatically tightened into coils, and the integrity of the two butt-welded wire blank coil stocks is ensured.
Preferably, the rotation of both said rods is driven by the same driving member. The device is convenient to arrange, can better ensure the synchronism of the rotation of the two receiving rods, and ensures the stability of the coil stock in the process of overturning.
Preferably, the rotary tray is provided with a plurality of mounting parts for placing the wire blank coil stock, and the mounting parts are provided with two mounting rods which are parallel to each other and have equal intervals with the two rod bodies. When the material receiving rod rotates to the material receiving station, the material receiving rod and the mounting rod are positioned on the same straight line, so that the wire blank coil material positioned on the rotary material tray can be pushed to the welding machine along the mounting rod and the material receiving rod by the material pushing mechanism more conveniently.
In summary, the technical scheme of the invention has at least the following beneficial effects:
1. through designing the rotary material tray, a plurality of coil stock rolls can be placed on the material tray in advance, and the material can be fed in the welding process rapidly and automatically through the rotation of the rotary material tray, so that the feeding efficiency is improved;
2. after the two coil wire blank coil stock are welded, the coil stock of the coil wire blank can be automatically turned over by the material receiving rod on the welding machine, so that the labor amount of manual turning is reduced, the turning is reliable, and the safety risk is reduced;
3. the butt welding efficiency of the wire blank is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of the present invention in an initial state;
FIG. 2 is a schematic diagram showing the state of the invention in which the welding machine rotates to the material receiving station and corresponds to the No. 1 wire blank coil;
FIG. 3 is a schematic view showing a state that a pushing mechanism of the invention sends a 1# wire blank coil into a welding machine;
FIG. 4 is a schematic view of the present invention with a butt welder in a butt welding station to perform a butt welding operation;
FIG. 5 is a schematic illustration of the invention after butt welding and with the welder in a station to turn a coil of wire blank;
FIG. 6 is a schematic view of the invention with the coil stock of wire stock on the rotating tray fully transferred to the welder;
fig. 7 is a schematic view showing a state in which the welding machine is rotated to the blanking station after the whole butt welding operation is completed.
In the figure, 1, a rotary tray; 2. a butt welding machine; 3. coiling wire blanks; 4. a pushing rod; 5. a receiving rod; 6. a mounting rod; A. a material receiving station; B. a butt welding station; C. and a blanking station.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a wire blank butt welding method, which is shown in the accompanying drawings 1-7, and comprises the following steps:
s1: a plurality of wire blank coil materials 3 (1 # -n#) with uniformly distributed circumferences are placed on a rotary material tray 1 in advance; the number of the wire blank coil stock 3 in the invention can be placed in advance according to actual demands, wherein the rotary charging tray 1 is provided with a plurality of mounting parts for placing the wire blank coil stock 3, and the mounting parts are provided with two mounting rods 6 which are parallel to each other, so that the mounting rods 6 penetrate through the middle part of the wire blank coil stock 3 to realize the support of the wire blank coil stock 3. Referring to fig. 1, in this embodiment, 6 wire blank rolls 3 are taken as an example, and the 6 wire blank rolls 3 are circumferentially distributed; carrying out butt welding operation in sequence;
s2: referring to fig. 2, the welder 2 rotates to a station a, and a 1# wire blank coil is fed onto a material receiving rod 5 of the welder 2; when the welding machine 2 rotates to the welding station A, the material rod 5 and the mounting rod 6 are in the same straight line, wherein the material rod 5 comprises two rod bodies which are arranged at intervals and in parallel, the intervals of the mounting rod 6 are equal to those of the rod bodies, and thus the two rod bodies of the material rod 5 are respectively aligned with the two mounting rods 6, and the wire blank coil 3 conveniently enters the welding machine 2 from the rotary material disc 1.
S3: see fig. 4; the welding machine 2 rotates the 1# wire blank coil counterclockwise by 90 degrees to a welding station B, and welds the tail of the 1# wire blank coil with the head of the 2# wire blank coil on the rotary tray 1; the butt welding operation is performed manually on a welding workbench of the butt welding station B, and before the welding operation is performed, the ends of the two wire blank coil materials 3 to be welded are firstly required to be removed, so that the influence of an oxide layer at the end part on the welding quality is avoided.
S4: referring to fig. 5, after the welding is completed in S3, at this time, the welding machine 2 is rotated again (rotated 90 ° clockwise) to the material receiving station a, while the rotating tray 1 is rotated 360/n degrees, it should be noted that since one ends of the 1# wire blank coil and the 2# wire blank coil are already welded to each other, in order to avoid the wire blank from being torn during the process of changing the positions of the welding machine 2 and the rotating tray 1, it is necessary to ensure synchronous movement of the two, wherein the welding machine 2 is rotated 90 ° clockwise to reach the material receiving station a in this embodiment, the rotating tray 1 is rotated 60 ° counterclockwise to reach the 2# wire blank coil to the material receiving station a, and then step S5 is performed after both of the 2# wire blank coil reach the material receiving station a; after the wire blank between the 1# wire blank coil stock and the 2# wire blank coil stock is tightened by rotating the material receiving rod 5, the wire blank which is loosened after butt welding is wound on the 1# wire blank coil stock and the 2# wire blank coil stock, so that the wire blank is wound into a coil, specifically, the wire blank is realized through the rotation of the material receiving rod 5, and the two rod bodies in the wire winding device are mutually independent and can synchronously rotate around the axis of the wire blank. The material receiving rod 5 is inserted into the inner hole of the wire blank coil stock 3, and the wire blank coil stock 3 is automatically turned over by friction with the inner wall of the wire blank coil stock 3, so that loose wire blanks in the welding process between two wire reels are automatically tightened into coils, and the integrity of the two butt-welded wire blank coil stocks 3 is ensured. When the loose wire blank between the 1# wire blank coil and the 2# wire blank coil is wound and tightened, the pushing mechanism sends the 2# wire blank coil to the material receiving rod 5 of the welding machine 2;
s6: repeating the steps S3-S5 to sequentially finish butt welding operation of the 3# -6# wire blank coil 3; finally, butt welding of all wire blank coil stock 3 is completed, and all wire blank coil stock 3 forms a whole;
s7: referring to fig. 7, the butt welding machine 2 rotates clockwise to the blanking station C, and the whole blanking of the 1# 6 wire blank coil 3 with the butt welding connection completed is performed.
It can be seen that by adopting the butt welding method, semi-automatic butt welding operation is realized, automatic feeding, automatic turning and automatic discharging can be realized by rotating the material tray 1 and the butt welding machine 2, the manual labor amount is reduced, the safety risk is reduced, and the production efficiency is improved.
In order to realize the transition of the wire blank coil stock 3 on the rotary tray 1 to the butt welding machine 2, the invention is provided with a pushing mechanism at the central part of the rotary tray 1, wherein the pushing mechanism comprises a pushing rod 4 and a pushing driving part, one end of the pushing rod 4 faces to a receiving station A, and the pushing driving part drives the pushing rod 4 to intermittently stretch and retract. The pushing structure can automatically send the wire blank coil stock 3 on the rotary tray 1 to the butt welding machine 2, reduces the manual labor amount and ensures the continuous operation of butt welding connection.
In order to reduce the occupied area in the whole butt welding operation, the butt welding station B and the blanking station C are distributed on two sides of the blanking station A. The arrangement mode can reduce the transfer formation of materials among different stations in the whole operation process, and improves the production efficiency.
The number n of wire stock rolls 3 in the present invention is 4, 5 or 6. The number of the coil stock 3 can be set to different numbers according to production requirements, and the production is more flexible.
The rotation of the two rod bodies of the receiving rod 5 in the invention is driven by the same driving part. Therefore, the equipment cost can be reduced, the arrangement is convenient, the rotation synchronism of the two material receiving rods 5 can be better ensured, and the stability of the coil stock 3 in the overturning process of the coil stock is ensured.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims (8)

1. A wire blank butt welding method, comprising the steps of:
s1: a plurality of wire blank coil materials (1 # -n#) with uniformly distributed circumferences are placed on a rotary material tray in advance;
s2: rotating the welding machine to a material station, and feeding the 1# wire blank coil material to a material receiving rod of the welding machine;
s3: the welding machine rotates the 1# wire blank coil to a welding station, and the tail of the 1# wire blank coil is welded with the head of the 2# wire blank coil on the rotating tray;
s4: rotating the welding machine to a material receiving station again, rotating the material disc for 360/n degrees, and rotating the No. 2 wire blank coil material to the material receiving station;
s5, performing S5; after the wire blank between the wire blank coil stock 1 and the wire blank coil stock 2 is tightened by rotating the material receiving rod, the wire blank coil stock 2 is sent to the material receiving rod of the welding machine by rotating the material tray;
s6: repeating the steps S3-S5 to finish butt welding operation of the 3# -n # wire blank coil material sequentially;
s7: and (3) rotating the welding machine to a blanking station, and blanking the whole 1# n wire blank coil material with the butt welding connection completed.
2. The wire blank butt welding method according to claim 1, wherein a pushing mechanism is arranged at the center of the rotary material tray, the pushing mechanism comprises a pushing rod and a pushing driving part, one end of the pushing rod faces to the material receiving station, and the pushing driving part drives the pushing rod to intermittently stretch and retract.
3. A wire blank butt welding method according to claim 1, wherein in step S3, the head and tail portions of the wire blank coil are deheaded before the wire blank coil is welded.
4. A wire blank butt welding method according to claim 1 wherein the butt welding station and the blanking station are distributed on both sides of the blanking station.
5. A wire blank butt welding method according to claim 1, wherein the number n of wire blank rolls is 4, 5 or 6.
6. A wire blank butt welding method according to claim 1, wherein the stock receiving rod comprises two spaced and parallel rod bodies, the two rod bodies being independent of each other and capable of rotating synchronously about their own axes.
7. A wire blank butt welding method according to claim 1, wherein the rotation of both said bars is driven by the same driving member.
8. The wire blank butt welding method according to claim 6, wherein the rotary tray is provided with a plurality of mounting portions for placing the wire blank coil stock, and the mounting portions are provided with two mounting bars parallel to each other and spaced equally from the two bar bodies.
CN202310246464.XA 2023-03-09 2023-03-09 Wire blank butt welding method Pending CN116276071A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202310246464.XA CN116276071A (en) 2023-03-09 2023-03-09 Wire blank butt welding method
CN202380010549.6A CN117794681A (en) 2023-03-09 2023-08-17 Wire blank butt welding device and wire blank butt welding method
US18/242,191 US11925997B1 (en) 2023-03-09 2023-09-05 Wire billet butt-welding apparatus and wire billet butt-welding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310246464.XA CN116276071A (en) 2023-03-09 2023-03-09 Wire blank butt welding method

Publications (1)

Publication Number Publication Date
CN116276071A true CN116276071A (en) 2023-06-23

Family

ID=86828300

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310246464.XA Pending CN116276071A (en) 2023-03-09 2023-03-09 Wire blank butt welding method

Country Status (1)

Country Link
CN (1) CN116276071A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11925997B1 (en) 2023-03-09 2024-03-12 Zhejiang Hailiang Co., Ltd. Wire billet butt-welding apparatus and wire billet butt-welding method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11925997B1 (en) 2023-03-09 2024-03-12 Zhejiang Hailiang Co., Ltd. Wire billet butt-welding apparatus and wire billet butt-welding method

Similar Documents

Publication Publication Date Title
CN116276071A (en) Wire blank butt welding method
US7909067B2 (en) Method, an apparatus and a means for making a reinforcement mesh
CN102837438B (en) The manufacture method of hawser tyre bead and the manufacturing system of hawser tyre bead
CN209503356U (en) A kind of steel reinforcement cage welding positioning tool
US6925705B2 (en) Cage making apparatus
US9561557B2 (en) Method and system for the production of reinforcing dowel baskets for contracting-expanding joints
JP2000271618A (en) Roll stand for forming metallic tube
JP4959096B2 (en) Apparatus for receiving and further moving a rolled strip bundle transferred from a strip rolling line or a rolling strip support
JPH0636369B2 (en) Method for winding electrode assembly
JPH0211268A (en) Reinforcing cage production machine
JPH06210460A (en) Welding machine for pile head peinforcing material
JP6514249B2 (en) Combined welding and rolling plant for metal strip
US5890645A (en) Continuous feed wire uncoiler
US20070011858A1 (en) Apparatus to roll, cut, weld, and form tank car outer jackets
KR102361646B1 (en) A Current Transformer Ring-Shaped Core Winding Wire Automatic Manufacture System And A Operation Method With The Current Transformer Winding Wire Ring-Shaped Core Automatic Manufacture System Thereof
JP2003517404A (en) Winding device, winding system and winding method for quilted contour
SU981546A1 (en) Stand for making reinforcement framework for concrete pipes
US11925997B1 (en) Wire billet butt-welding apparatus and wire billet butt-welding method
US3716210A (en) Pc concrete pipe reinforcement structure
US20090038740A1 (en) Machines And Methods For Manufacturing Of An Object Closed Onto Itself
JP4005233B2 (en) Method and apparatus for winding wire around bobbin
JP2805143B2 (en) Continuous manufacturing method of flat folded metal tube
JPS6334766Y2 (en)
JP3885008B2 (en) Winding method using winding jig for unwinding long tape-shaped film, unwinding method, and correction device for welded seam welded portion using them
WO2000053367A1 (en) High pressure tanks and method of making

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