CN111618122A - Production process of high-frequency straight-seam electric welding steel pipe - Google Patents
Production process of high-frequency straight-seam electric welding steel pipe Download PDFInfo
- Publication number
- CN111618122A CN111618122A CN202010501588.4A CN202010501588A CN111618122A CN 111618122 A CN111618122 A CN 111618122A CN 202010501588 A CN202010501588 A CN 202010501588A CN 111618122 A CN111618122 A CN 111618122A
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- Prior art keywords
- tube
- steel
- welding
- tube blank
- pipe
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0807—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention discloses a production process of a high-frequency straight-seam electric welding steel pipe, which removes unqualified steel strips through acceptance inspection, then conveying the steel strip to a production line corresponding to the steel tube by uncoiling and feeding, sequentially extruding and drawing through a mouth-binding die, seaming the side edge of the steel strip and performing straight seam spot welding to form a tube blank, performing ultrasonic flaw detection one by ultrasonic detection equipment, then performing repair welding, performing high-frequency heating on the pipe blank under the conditions of low voltage and high current with the input voltage of 342-430V and the input current of 130A by high-frequency heating to obtain a pipe blank, performing surface treatment, performing shape correction on the pipe blank by using a sizing unit, performing fixed-distance shearing to obtain a finished steel pipe, the process can realize the balance of the welding speed and the heat treatment speed, is favorable for realizing the allocation of a steel pipe production line, realizes the automatic flow line production, and improves the production speed and the production efficiency of the straight seam steel pipe.
Description
Technical Field
The invention particularly relates to a production process of a high-frequency straight-seam electric welding steel pipe.
Background
The straight seam steel pipe is a steel pipe with a welding seam parallel to the longitudinal direction of the steel pipe. Generally, a long strip steel strip of a certain specification is rolled into a circular tube shape by a high-frequency welding machine set, and straight seam welding is performed to form a steel tube. The shape of the steel pipe can be round, square or special, and depends on the sizing rolling after welding, and procedures such as weld seam renovation and heat treatment are carried out after the rolling is finished.
Disclosure of Invention
In view of the above, the present invention aims to provide a production process of high-frequency straight seam electric welding steel pipe, which can realize balance between welding speed and heat treatment speed, is beneficial to realizing allocation of steel pipe production line, realizes automatic flow line production, and improves production speed and production efficiency of straight seam steel pipe.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a production process of a high-frequency straight-seam electric welding steel pipe comprises the following steps:
step 1, steel strip acceptance: after the purchased steel coil is longitudinally cut, the steel coil is put in storage and prepared after the width dimension of the steel coil meets the requirement of the product, and is recovered and processed for standby after the width dimension of the steel coil does not meet the requirement of the product;
step 2, uncoiling and feeding: installing the steel coil qualified in the step 1 in an uncoiler through a hanger, and then moving the steel coil to a production line corresponding to the steel pipe for later use;
step 3, butt welding and feeding: carrying out butt spot welding on the head and the tail of the steel strip unreeled and sent out in the step 2, and then storing the steel strip subjected to butt welding in a loop for a pipe welding machine production line to carry out pipe blank processing;
and 4, forming and welding the steel pipe: conveying the steel strip which is butt-welded in the step 3 into a pipe welding machine production line for extrusion traction, seaming the side edges of the steel strip through a necking die under the action of traction, performing straight seam spot welding to form a tube blank, continuously inputting the tube blank into ultrasonic detection equipment in the pipe welding machine production line for piece-by-piece ultrasonic flaw detection, marking the tube blank part with white spots, serious segregation, looseness and other defects after flaw detection, performing repair welding through repair welding equipment in the pipe welding machine production line after ultrasonic detection, conveying the tube blank into high-frequency heating in the pipe welding machine production line, and performing high-frequency heating on the tube blank under the conditions of low voltage and high current with the input voltage of 342-430V and the input current of 130A to heat and quench the tube blank;
step 5, steel pipe surface treatment: after the tube blank is treated by high-frequency heating in a tube welding machine production line, burrs and oil stains are generated on the welding line on the surface of the tube blank due to extrusion protrusion or on the surface of the tube blank, and the welding line and the burrs protruding on the surface of the tube blank need to be scraped by scraping equipment, so that the appearance quality of the tube blank is ensured for later use;
step 6, shaping the tube blank: after the surface treatment of the tube blank is finished, a sizing unit in a tube welding machine production line is used for carrying out external shaping on the welded tube blank so that the size of the tube blank and the shape of the tube body meet the production requirements;
step 7, straightening and sawing the tube blank: and (4) the tube blanks subjected to sizing processing by the sizing unit in the step (6) enter a Turkish head straightening device in a production line of the tube welding machine to straighten the sized steel tubes to ensure that the appearance of the steel tubes is qualified, and then the tube blanks are cut at a fixed distance by fixed-length cutting equipment in the production line of the tube welding machine to ensure that the tube blanks are uniform in length.
And 8: and (6) storing and warehousing.
Further, the shape of the tube blank in the step 6 is customized according to a corresponding mold.
The technical effects of the invention are mainly reflected in the following aspects: unqualified steel strips are rejected by acceptance check, then the steel strips are conveyed to a production line corresponding to the steel tubes by uncoiling and feeding, and are extruded and pulled by a beam opening die in sequence, so that the side edges of the steel strips are seamed and welded into a tube blank by straight seam spot welding, the tube blank is subjected to repair welding after ultrasonic flaw detection piece by ultrasonic detection equipment, the tube blank is subjected to high-frequency heating under the conditions of low voltage and high current, wherein the input voltage is 342-430V and the input current is 130A, so as to obtain the tube blank, finally, the surface treatment is carried out, the shape correction and fixed-distance shearing are carried out on the tube blank by using a sizing unit, so that a finished steel tube is prepared.
Detailed Description
The embodiments of the present invention are described in further detail to make the technical solutions of the present invention easier to understand and master.
Example 1
A production process of a high-frequency straight-seam electric welding steel pipe comprises the following steps:
step 1, steel strip acceptance: after the purchased steel coil is longitudinally cut, the steel coil is put in storage and prepared after the width dimension of the steel coil meets the requirement of the product, and is recovered and processed for standby after the width dimension of the steel coil does not meet the requirement of the product;
step 2, uncoiling and feeding: installing the steel coil qualified in the step 1 in an uncoiler through a hanger, and then moving the steel coil to a production line corresponding to the steel pipe for later use;
step 3, butt welding and feeding: carrying out butt spot welding on the head and the tail of the steel strip unreeled and sent out in the step 2, and then storing the steel strip subjected to butt welding in a loop for a pipe welding machine production line to carry out pipe blank processing;
and 4, forming and welding the steel pipe: conveying the steel strip which is butt-welded in the step 3 into a pipe welding machine production line for extrusion traction, seaming the side edges of the steel strip through a necking die under the action of traction, performing straight seam spot welding to form a tube blank, continuously inputting the tube blank into ultrasonic detection equipment in the pipe welding machine production line for piece-by-piece ultrasonic flaw detection, marking the tube blank part with white spots, serious segregation, looseness and other defects after flaw detection, performing repair welding through repair welding equipment in the pipe welding machine production line after ultrasonic detection, conveying the tube blank into high-frequency heating in the pipe welding machine production line, and performing high-frequency heating on the tube blank under the conditions of low voltage and high current with the input voltage of 342-430V and the input current of 130A to heat and quench the tube blank;
step 5, steel pipe surface treatment: after the tube blank is treated by high-frequency heating in a tube welding machine production line, burrs and oil stains are generated on the welding line on the surface of the tube blank due to extrusion protrusion or on the surface of the tube blank, and the welding line and the burrs protruding on the surface of the tube blank need to be scraped by scraping equipment, so that the appearance quality of the tube blank is ensured for later use;
step 6, shaping the tube blank: after the surface treatment of the tube blank is finished, a sizing unit in a tube welding machine production line is used for carrying out external shaping on the welded tube blank so that the size of the tube blank and the shape of the tube body meet the production requirements;
step 7, straightening and sawing the tube blank: and (4) the tube blanks subjected to sizing processing by the sizing unit in the step (6) enter a Turkish head straightening device in a production line of the tube welding machine to straighten the sized steel tubes to ensure that the appearance of the steel tubes is qualified, and then the tube blanks are cut at a fixed distance by fixed-length cutting equipment in the production line of the tube welding machine to ensure that the tube blanks are uniform in length.
And 8: and (6) storing and warehousing.
In this embodiment, the shape of the tube blank in step 6 is customized according to the corresponding mold.
The technical effects of the invention are mainly reflected in the following aspects: unqualified steel strips are rejected by acceptance check, then the steel strips are conveyed to a production line corresponding to the steel tubes by uncoiling and feeding, and are extruded and pulled by a beam opening die in sequence, so that the side edges of the steel strips are seamed and welded into a tube blank by straight seam spot welding, the tube blank is subjected to repair welding after ultrasonic flaw detection piece by ultrasonic detection equipment, the tube blank is subjected to high-frequency heating under the conditions of low voltage and high current, wherein the input voltage is 342-430V and the input current is 130A, so as to obtain the tube blank, finally, the surface treatment is carried out, the shape correction and fixed-distance shearing are carried out on the tube blank by using a sizing unit, so that a finished steel tube is prepared.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.
Claims (2)
1. The production process of the high-frequency straight-seam electric welding steel pipe is characterized by comprising the following steps of:
step 1, steel strip acceptance: after the purchased steel coil is longitudinally cut, the steel coil is put in storage and prepared after the width dimension of the steel coil meets the requirement of the product, and is recovered and processed for standby after the width dimension of the steel coil does not meet the requirement of the product;
step 2, uncoiling and feeding: installing the steel coil qualified in the step 1 in an uncoiler through a hanger, and then moving the steel coil to a production line corresponding to the steel pipe for later use;
step 3, butt welding and feeding: carrying out butt spot welding on the head and the tail of the steel strip unreeled and sent out in the step 2, and then storing the steel strip subjected to butt welding in a loop for a pipe welding machine production line to carry out pipe blank processing;
and 4, forming and welding the steel pipe: conveying the steel strip which is butt-welded in the step 3 into a pipe welding machine production line for extrusion traction, seaming the side edges of the steel strip through a necking die under the action of traction, performing straight seam spot welding to form a tube blank, continuously inputting the tube blank into ultrasonic detection equipment in the pipe welding machine production line for piece-by-piece ultrasonic flaw detection, marking the tube blank part with white spots, serious segregation, looseness and other defects after flaw detection, performing repair welding through repair welding equipment in the pipe welding machine production line after ultrasonic detection, conveying the tube blank into high-frequency heating in the pipe welding machine production line, and performing high-frequency heating on the tube blank under the conditions of low voltage and high current with the input voltage of 342-430V and the input current of 130A to heat and quench the tube blank;
step 5, steel pipe surface treatment: after the tube blank is treated by high-frequency heating in a tube welding machine production line, burrs and oil stains are generated on the welding line on the surface of the tube blank due to extrusion protrusion or on the surface of the tube blank, and the welding line and the burrs protruding on the surface of the tube blank need to be scraped by scraping equipment, so that the appearance quality of the tube blank is ensured for later use;
step 6, shaping the tube blank: after the surface treatment of the tube blank is finished, a sizing unit in a tube welding machine production line is used for carrying out external shaping on the welded tube blank so that the size of the tube blank and the shape of the tube body meet the production requirements;
step 7, straightening and sawing the tube blank: and (4) the tube blanks subjected to sizing processing by the sizing unit in the step (6) enter a Turkish head straightening device in a production line of the tube welding machine to straighten the sized steel tubes to ensure that the appearance of the steel tubes is qualified, and then the tube blanks are cut at a fixed distance by fixed-length cutting equipment in the production line of the tube welding machine to ensure that the tube blanks are uniform in length.
And 8: and (6) storing and warehousing.
2. The process for producing a high-frequency straight-seam electric welded steel pipe as claimed in claim 1, wherein: and (4) customizing the shape of the tube blank in the step 6 according to a corresponding mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010501588.4A CN111618122A (en) | 2020-06-04 | 2020-06-04 | Production process of high-frequency straight-seam electric welding steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010501588.4A CN111618122A (en) | 2020-06-04 | 2020-06-04 | Production process of high-frequency straight-seam electric welding steel pipe |
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| Publication Number | Publication Date |
|---|---|
| CN111618122A true CN111618122A (en) | 2020-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010501588.4A Pending CN111618122A (en) | 2020-06-04 | 2020-06-04 | Production process of high-frequency straight-seam electric welding steel pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113084459A (en) * | 2021-04-13 | 2021-07-09 | 中钢不锈钢管业科技山西有限公司 | Continuous intelligent forming process for stainless steel straight welded pipe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20110817U1 (en) * | 2001-06-29 | 2001-11-22 | Chung Ching Chi | Shaping device for hollow tubes and their products |
| CN105127236A (en) * | 2015-08-18 | 2015-12-09 | 马鞍山市华科实业有限公司 | Manufacturing method for special-shaped steel pipes special for logistics shelves |
| CN106541253A (en) * | 2017-01-18 | 2017-03-29 | 浙江鑫桦钢管有限公司 | A kind of production technology of steel pipe |
| CN110142310A (en) * | 2019-05-31 | 2019-08-20 | 常熟市盈博钢管有限公司 | A kind of production technology of steel pipes with straight |
-
2020
- 2020-06-04 CN CN202010501588.4A patent/CN111618122A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20110817U1 (en) * | 2001-06-29 | 2001-11-22 | Chung Ching Chi | Shaping device for hollow tubes and their products |
| CN105127236A (en) * | 2015-08-18 | 2015-12-09 | 马鞍山市华科实业有限公司 | Manufacturing method for special-shaped steel pipes special for logistics shelves |
| CN106541253A (en) * | 2017-01-18 | 2017-03-29 | 浙江鑫桦钢管有限公司 | A kind of production technology of steel pipe |
| CN110142310A (en) * | 2019-05-31 | 2019-08-20 | 常熟市盈博钢管有限公司 | A kind of production technology of steel pipes with straight |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113084459A (en) * | 2021-04-13 | 2021-07-09 | 中钢不锈钢管业科技山西有限公司 | Continuous intelligent forming process for stainless steel straight welded pipe |
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Application publication date: 20200904 |
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