CN113000625A - Welded pipe processing technology capable of replacing seamless pipe - Google Patents
Welded pipe processing technology capable of replacing seamless pipe Download PDFInfo
- Publication number
- CN113000625A CN113000625A CN202110295444.2A CN202110295444A CN113000625A CN 113000625 A CN113000625 A CN 113000625A CN 202110295444 A CN202110295444 A CN 202110295444A CN 113000625 A CN113000625 A CN 113000625A
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- welded pipe
- pipe
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- 238000005516 engineering process Methods 0.000 title claims abstract description 17
- 238000003466 welding Methods 0.000 claims abstract description 52
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 238000005498 polishing Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims description 19
- 239000000428 dust Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 238000007781 pre-processing Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000746 purification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a welded pipe processing technology capable of replacing a seamless pipe, which comprises the following steps: step 1: pretreating raw materials; step 2: forming and rolling; and step 3: welding; and 4, step 4: polishing the welding line; and 5: heat treatment; step 6: and (6) cleaning and detecting. The invention can simultaneously polish the welding line from the inner side and the outer side through the polishing device, so that the welding line of the welded pipe is smooth, the seamless treatment of the welded pipe is realized, and meanwhile, in the processes of cleaning and drying the surface of the steel belt and drying the welded pipe, the waste heat generated in the heat treatment of the welded pipe is effectively utilized, the energy consumption in the production process can be effectively reduced, and the aim of saving energy is fulfilled.
Description
Technical Field
The invention belongs to the technical field of welded pipe processing, and particularly relates to a welded pipe processing technology capable of replacing a seamless pipe.
Background
Seamless steel pipes are steel pipes which are punched by a whole round steel and have no welding seams on the surface, and are called seamless steel pipes. The welded steel pipe is also called as welded pipe, and is made up by using steel plate or band steel through the processes of coiling and forming and welding. The welded steel pipe has simple production process, high production efficiency, various types and specifications and less equipment investment, but the general strength is lower than that of a seamless steel pipe.
Compared with seamless tubes, welded tubes have the following disadvantages: the welding seam is not extruded, rolled and compacted by a rolled pipe and an inner core, so that the welding seam and a matrix tissue are consistent, and the welding seam strength is low. The weld trace cannot be eliminated and the weld can be seen.
Disclosure of Invention
The invention aims to provide a welded pipe processing technology capable of replacing a seamless pipe so as to solve the technical problem that a welded pipe welding seam is difficult to eliminate.
In order to solve the technical problems, the specific technical scheme of the welded pipe processing technology capable of replacing the seamless pipe is as follows:
a welded pipe processing technology capable of replacing a seamless pipe comprises the following steps:
step 1: the method comprises the following steps of (1) preprocessing raw materials, flattening and trimming strip steel after uncoiling, and cleaning and drying the surface of the strip steel by high-pressure airflow generated by an air pump;
step 2: forming and rolling, wherein the strip steel is rolled by a roller to form a tube blank, a gap of 1mm-3mm is reserved at the welding position of the tube blank, and two ends of a welding opening are leveled;
and step 3: welding, wherein the pipe blank penetrates through a box body with the interior under negative pressure, and a welding seam gap of the pipe blank is welded in the box body through a high-frequency welding machine to form a welded pipe;
and 4, step 4: polishing the welding seam, namely polishing and flattening the welding seam of the welded pipe by using a polishing device;
and 5: heat treatment, heating the welded pipe to 500-550 ℃, preserving heat for 2-3 hours, then slowly cooling, and releasing the internal stress of the welded pipe;
step 6: cleaning and detecting, namely performing eddy current flaw detection and pressure detection on the welded pipe, performing acid washing on the welded pipe after detection is finished to remove surface stains and rust, washing the welded pipe with clear water, and drying to obtain a finished steel pipe.
Preferably, grinding device includes the mount pad, the mount pad top is provided with lift platform and slide rail, lift platform be last be provided with two axial leads with the parallel backing roll of slide rail extending direction, there is the removal support through mobile device sliding connection on the slide rail, be fixed with the edge on the removal support inboard track and the outside track that backing roll axial lead direction distributes, inboard track with outside track interval sets up, there is inboard grinding device through interior slider sliding connection on the inboard track, sliding connection has outer slider on the track of the outside, be provided with liftable and pivoted outside grinding device on the outer slider.
Preferably, outer slider is close to inboard orbital one side is equipped with the mounting panel, the equal fixed sliding sleeve in outer slider's both sides, two the sliding sleeve about outside track symmetry sets up, sliding connection has the bracing piece in the sliding sleeve, two the one end of bracing piece respectively with the middle part of the just right both sides of mounting panel is articulated, the both ends of mounting panel all through electric putter respectively with outer slider's both ends are articulated.
Preferably, one side of the lifting platform, which is away from the moving support, is provided with a fixed support fixed with the mounting seat, the fixed support is provided with two positioning sleeves, and the outer side sliding rail and the inner side sliding rail are respectively matched with the two positioning sleeves.
Preferably, the movable support is provided with a purification box with an internal filling filter element, the purification box is communicated with an air inlet end of a vacuum pump, the inner sliding device is provided with a flexible dust cover, the inner side polishing device is located in the dust cover, and the dust cover is communicated with the purification box through a corrugated pipe.
Preferably, the support roller is provided with a plurality of flexible support rings along the axial lead direction of the support roller in a spaced manner.
Preferably, the heat treatment process in the step 5 is performed in a closed heat-insulating container, heat conduction pipes are uniformly distributed in the heat-insulating container around the welded pipe, the air inlet end and the air outlet end of each heat conduction pipe are communicated with the outside of the heat-insulating container, and the air outlet end of each heat conduction pipe is communicated with the air outlet end of the air pump in the step 1.
Preferably, in the welding process in the step 3, the welding seam of the welded pipe needs to be synchronously extruded from the inner side and the outer side, so that the preliminary shaping of the welding seam is realized, and air is simultaneously extruded.
Preferably, the working process of the polishing device is as follows: 401, placing the welded pipe on two supporting rollers, lifting the lifting platform to adjust the height of the welded pipe, and driving the welded pipe to rotate by the supporting rollers; step 402, the moving device drives the moving support to move, so that the inner side rail moves into the welded pipe, and the outer side rail is positioned above the welded pipe; step 403, driving the inner side polishing device to move along the inner side track by the inner sliding device to polish the inner side of the welding seam; and step 404, driving the outer side polishing device to move along the outer side track by the outer sliding device to polish the outer side of the welding seam.
Preferably, the step 6 is to dry the residual heat generated by cooling the welded pipe in the step 5.
The welded pipe processing technology capable of replacing the seamless pipe has the following advantages: can polish the welding seam simultaneously from inside and outside both sides through grinding device, make welded tube welding seam department level and smooth, realize the seamless processing to the welded tube, at steel band surface cleaning and drying and welded tube stoving in-process simultaneously, the waste heat that produces when effectual utilization welded tube heat treatment can effectively reduce the energy consumption in the production process, reaches energy-conserving purpose.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic view of the polishing apparatus of the present invention;
FIG. 3 is a schematic view of the internal structure of the polishing apparatus of the present invention;
fig. 4 is an enlarged view of a portion a of fig. 3.
The notation in the figure is: 1. a vacuum pump; 2. a purification box; 3. a bellows; 4. an inboard track; 5. an outboard track; 6. a support roller; 7. a positioning sleeve; 8. fixing a bracket; 9. a lifting platform; 10. a mounting seat; 11. a slide rail; 12. moving the support; 13. a mobile device; 14. mounting a plate; 15. an electric push rod; 16. a support bar; 17. a sliding sleeve; 18. an outer slide; 19. a dust cover; 20. an inner slide device; 21. an inner side polishing device; 22. an outer side polishing device.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, a welded pipe processing technique capable of replacing a seamless pipe will be described in detail with reference to the accompanying drawings.
As shown in FIG. 1, a welded pipe processing technique capable of replacing a seamless pipe comprises the following steps:
step 1: the method comprises the following steps of (1) preprocessing raw materials, flattening and trimming the uncoiled strip steel, and cleaning and drying the surface of the strip steel by using high-pressure airflow generated by an air pump to clean and dry the surface of the strip steel, so that the welding effect of the strip steel is improved;
step 2: forming and rolling, wherein the strip steel is rolled by a roller to form a tube blank, a gap of 1mm-3mm is reserved at the welding position of the tube blank, and two ends of a welding opening are leveled;
and step 3: welding, wherein the pipe blank penetrates through a box body with the interior under negative pressure, and a welding seam gap of the pipe blank is welded in the box body through a high-frequency welding machine to form a welded pipe;
and 4, step 4: polishing the welding seam, namely polishing and flattening the welding seam of the welded pipe by using a polishing device;
and 5: heat treatment, heating the welded pipe to 500-550 ℃, preserving heat for 2-3 hours, then slowly cooling, and releasing the internal stress of the welded pipe;
step 6: cleaning and detecting, namely performing eddy current flaw detection and pressure detection on the welded pipe, performing acid washing on the welded pipe after detection is finished to remove surface stains and rust, washing the welded pipe with clear water, and drying to obtain a finished steel pipe.
The welded pipe heat treatment process is carried out in a closed heat-insulating container, the heat-insulating effect of the welded pipe can be improved, the heat energy loss is reduced, heat conduction pipes are uniformly distributed in the heat-insulating container around the welded pipe, the welded pipe can be uniformly cooled through the heat conduction pipes, the air inlet ends and the air outlet ends of the heat conduction pipes are communicated with the outside of the heat-insulating container, the air outlet ends of the heat conduction pipes are communicated with the air outlet end of the air pump in the step 1, the recycling of the cooling waste heat of the welded pipe is realized in the process, the temperature of high-pressure airflow for cleaning and drying the surface of the steel belt in the step 1 is increased, the drying effect and the efficiency of the steel belt are improved, the requirement on the temperature is lower when the welded pipe is dried in the step 6, the waste heat in the heat treatment of.
In the steel strip welding process, in order to facilitate subsequent welding seam polishing treatment, welding quality is improved simultaneously, welding seams of the welded pipe need to be extruded synchronously from the inner side and the outer side, preliminary shaping of the welding seams is achieved, and air is extruded simultaneously.
As shown in fig. 2-4, grinding device includes mount pad 10, mount pad 10 top is provided with lift platform 9 and slide rail 11, lift platform 9 is last be provided with two axial leads with the parallel backing roll 6 of slide rail 11 extending direction, there is movable support 12 through mobile device 13 sliding connection on the slide rail 11, be fixed with the edge on the movable support 12 inboard track 4 and the outside track 5 that the 6 axial leads of backing roll direction distributes, inboard track 4 with outside track 5 interval sets up, there is inboard grinding device 21 through interior slider 20 sliding connection on the inboard track 4, sliding connection has outer slider 18 on the outside track 5, be provided with liftable and pivoted outside grinding device 22 on the outer slider 18.
The working flow of the polishing device is as follows: 401, placing the welded pipe on two supporting rollers 6, lifting the lifting platform 9 to adjust the height of the welded pipe, and driving the welded pipe to rotate by the supporting rollers 6; step 402, the moving device 13 drives the moving support 12 to move, so that the inner side rail 4 moves into the welded pipe, and the outer side rail 5 is positioned above the welded pipe; step 403, driving the inner side polishing device 21 to move along the inner side track 4 by the inner sliding device 20, so as to polish the inner side of the weld joint; and step 404, the outer sliding device 18 drives the outer side grinding device 22 to move along the outer side rail 5, so that the outer side of the welding seam is ground.
In-process that equipment of polishing was polished, even process not unidimensional steel pipe, also can be through lift platform 9 regulation steel pipe height, make inboard track 4 and outside track 5 remove respectively to the inside and outside both sides of steel pipe, make inboard grinding device 21 and outside grinding device 22 can polish the steel pipe welding seam from inside and outside both sides simultaneously, improve work efficiency, the steerable steel pipe of backing roll 6 rotates simultaneously, removal cooperation through inboard grinding device 21 and outside grinding device 22, make equipment applicable in the welding seam of transversal joint pipe and spiral welded pipe polish, backing roll 6 is last to be equipped with a plurality of flexible support rings along its axial lead direction spacer, the protection to the welded pipe can be realized to the flexible support ring, the metal piece between welded pipe and the backing roll can be discharged in the clearance between each support ring, prevent the surface wear of welded pipe.
In order to improve the quality of the welded pipe, the two ends of the welded pipe are polished, one side of the outer sliding device 18, which is close to the inner side rail 4, is provided with a mounting plate 14, sliding sleeves 17 are fixed on the two sides of the outer sliding device 18, the two sliding sleeves 17 are symmetrically arranged relative to the outer side rail 5, supporting rods 16 are connected in the sliding sleeves 17 in a sliding manner, one ends of the two supporting rods 16 are respectively hinged with the middle parts of the two opposite sides of the mounting plate 14, the two ends of the mounting plate 14 are respectively hinged with the two ends of the outer sliding device 18 through electric push rods 15, the supporting and guiding of the mounting plate 14 are realized through the matching of the sliding sleeves 17 and the supporting rods 16, when the two electric push rods 15 are synchronously stretched, the lifting of the mounting plate 14 can be realized, and then the lifting of the outer side polishing device 22 is realized, so that the polishing, through controlling two electric putter 15's flexible distance respectively, can make mounting panel 14 rotatory round the pin joint with bracing piece 16, realize outside grinding device 22's angle modulation, through outside grinding device 22's height and angle modulation, make outside grinding device 22 can polish to the welding pipe tip.
In order to polish the welded pipe, the inner side rail 4 and the outer side rail 5 need to have longer lengths, so that the inner side rail 4 and the outer side rail 5 are prone to shaking, a fixing support 8 fixed with the mounting seat 10 is arranged on one side, away from the moving support 12, of the lifting platform 9, two positioning sleeves 7 are arranged on the fixing support 8, the outer side sliding rail 11 and the inner side sliding rail 11 are respectively matched with the two positioning sleeves 7, the positioning sleeves 7 penetrate through the fixing support 12, and after the end portions of the inner side rail 4 and the outer side rail 5 are inserted into the positioning sleeves 7, two-point support of the inner side rail 4 and the outer side rail 5 can be achieved, and stability of the inner side rail 4 and the outer side rail 5 is effectively improved.
The piece that the production of polishing is remained easily in the weld pipe, be provided with the purifying box 2 of inside packing filter core on the movable support 12, the intercommunication has vacuum pump 1's inlet end on the purifying box 2, install flexible dust cover 19 on the internal slider 20, inboard grinding device 21 is located the dust cover 19, dust cover 19 through bellows 3 with purifying box 2 intercommunication, dust cover 19 can effectively prevent to polish the piece and splash, realize the effective collection to the piece, vacuum pump 1 provides power, inhales the piece through bellows 3 in purifying box 2, and the piece in the later centralized processing purifying box 2 can effectively reduce and weld intraductal remaining piece.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A welded pipe processing technology capable of replacing a seamless pipe is characterized by comprising the following steps:
step 1: the method comprises the following steps of (1) preprocessing raw materials, flattening and trimming strip steel after uncoiling, and cleaning and drying the surface of the strip steel by high-pressure airflow generated by an air pump;
step 2: forming and rolling, wherein the strip steel is rolled by a roller to form a tube blank, a gap of 1mm-3mm is reserved at the welding position of the tube blank, and two ends of a welding opening are leveled;
and step 3: welding, wherein the pipe blank penetrates through a box body with the interior under negative pressure, and a welding seam gap of the pipe blank is welded in the box body through a high-frequency welding machine to form a welded pipe;
and 4, step 4: polishing the welding seam, namely polishing and flattening the welding seam of the welded pipe by using a polishing device;
and 5: heat treatment, heating the welded pipe to 500-550 ℃, preserving heat for 2-3 hours, then slowly cooling, and releasing the internal stress of the welded pipe;
step 6: cleaning and detecting, namely performing eddy current flaw detection and pressure detection on the welded pipe, performing acid washing on the welded pipe after detection is finished to remove surface stains and rust, washing the welded pipe with clear water, and drying to obtain a finished steel pipe.
2. The welded pipe processing technology capable of replacing seamless pipes according to claim 1, wherein the polishing device comprises a mounting seat (10), a lifting platform (9) and a sliding rail (11) are arranged at the top of the mounting seat (10), two supporting rollers (6) with axes parallel to the extending direction of the sliding rail (11) are arranged on the lifting platform (9), a moving bracket (12) is connected to the sliding rail (11) in a sliding manner through a moving device (13), an inner rail (4) and an outer rail (5) distributed along the axes of the supporting rollers (6) are fixed on the moving bracket (12), the inner rail (4) and the outer rail (5) are arranged at intervals, an inner polishing device (21) is connected to the inner rail (4) in a sliding manner through an inner sliding device (20), and an outer sliding device (18) is connected to the outer rail (5) in a sliding manner, the outer sliding device (18) is provided with an outer side polishing device (22) which can be lifted and rotated.
3. The welded pipe processing technology capable of replacing seamless pipes according to claim 2, wherein a mounting plate (14) is arranged on one side, close to the inner side rail (4), of the outer sliding device (18), sliding sleeves (17) are fixed on two sides of the outer sliding device (18), the two sliding sleeves (17) are symmetrically arranged on the outer side rail (5), supporting rods (16) are connected in the sliding sleeves (17) in a sliding mode, one ends of the two supporting rods (16) are hinged to the middle portions of two opposite sides of the mounting plate (14) respectively, and two ends of the mounting plate (14) are hinged to two ends of the outer sliding device (18) respectively through electric push rods (15).
4. The welded tube processing technology capable of replacing seamless tubes according to claim 3, wherein a fixed support (8) fixed with the mounting seat (10) is arranged on one side of the lifting platform (9) away from the movable support (12), two positioning sleeves (7) are arranged on the fixed support (8), and the outer side sliding rail (11) and the inner side sliding rail (11) are respectively matched with the two positioning sleeves (7).
5. The welded pipe processing technology capable of replacing seamless pipes according to claim 4, wherein a purifying box (2) filled with a filter element inside is arranged on the moving support (12), an air inlet end of a vacuum pump (1) is communicated with the purifying box (2), a flexible dust cover (19) is installed on the inner sliding device (20), the inner side grinding device (21) is located in the dust cover (19), and the dust cover (19) is communicated with the purifying box (2) through a corrugated pipe (3).
6. A welded pipe processing technology capable of replacing seamless pipes according to any claim of 2-5, characterized in that the supporting roll (6) is provided with a plurality of flexible supporting rings at intervals along the axial lead direction.
7. The welded pipe processing technology capable of replacing a seamless pipe according to claim 1, wherein the heat treatment process in the step 5 is performed in a closed heat-insulating container, heat-conducting pipes are uniformly distributed around the welded pipe in the heat-insulating container, the air inlet end and the air outlet end of each heat-conducting pipe are communicated with the outside of the heat-insulating container, and the air outlet end of each heat-conducting pipe is communicated with the air outlet end of the air pump in the step 1.
8. The welded pipe processing technology capable of replacing a seamless pipe according to claim 1, wherein in the welding process in the step 3, the welded pipe welding seam needs to be synchronously extruded from the inner side and the outer side, so that the primary shaping of the welded seam is realized, and air is simultaneously extruded.
9. The welded pipe processing technology capable of replacing a seamless pipe according to claim 2, wherein the working process of the grinding device is as follows: 401, placing the welded pipe on two supporting rollers (6), lifting the lifting platform (9) to adjust the height of the welded pipe, and driving the welded pipe to rotate by the supporting rollers (6); step 402, the moving device (13) drives the moving support (12) to move, so that the inner side rail (4) moves into the welded pipe, and the outer side rail (5) is located above the welded pipe; step 403, driving the inner side polishing device (21) to move along the inner side track (4) by the inner sliding device (20) to polish the inner side of the welding seam; and step 404, the outer sliding device (18) drives the outer side grinding device (22) to move along the outer side rail (5) to grind the outer side of the welding seam.
10. The process for processing welded pipes which can replace seamless pipes according to claim 1, wherein the step 6 is characterized in that the residual heat generated by the cooling of the welded pipes in the step 5 is guided to be dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110295444.2A CN113000625A (en) | 2021-03-19 | 2021-03-19 | Welded pipe processing technology capable of replacing seamless pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110295444.2A CN113000625A (en) | 2021-03-19 | 2021-03-19 | Welded pipe processing technology capable of replacing seamless pipe |
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| CN113000625A true CN113000625A (en) | 2021-06-22 |
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| CN113798792A (en) * | 2021-09-14 | 2021-12-17 | 广东信日德管业科技有限公司 | Manufacturing method of clean steel pipe |
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Application publication date: 20210622 |