CN112692127A - Smoke duct square-round segment arc plate rolling process adopting centering method - Google Patents
Smoke duct square-round segment arc plate rolling process adopting centering method Download PDFInfo
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- CN112692127A CN112692127A CN202011435386.0A CN202011435386A CN112692127A CN 112692127 A CN112692127 A CN 112692127A CN 202011435386 A CN202011435386 A CN 202011435386A CN 112692127 A CN112692127 A CN 112692127A
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- round steel
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- 238000005096 rolling process Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000000779 smoke Substances 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 238000005452 bending Methods 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 20
- 239000003546 flue gas Substances 0.000 claims description 20
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 4
- 230000011218 segmentation Effects 0.000 abstract description 4
- 230000001629 suppression Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 5
- 210000001503 joint Anatomy 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/22—Auxiliary equipment, e.g. positioning devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The application discloses a smoke duct square-round segment arc plate rolling process adopting a centering method, which comprises the following steps of: s1, manufacturing a centering die; s2, manufacturing a semicircular plate; s3, welding round steel matched with the centering die at the tip of the circle center of the semicircular plate to serve as a centering shaft; s4, placing the semicircular plate with the round steel on the lower roller of the plate bending machine; and S5, pressing the semicircular plate by adjusting the upper roll pressure of the plate bending machine. Adopt the centering system method of rolling up to the arc board to roll up system processing, the arc board uses point portion to rotate as the center when rolling up, constantly adjust system direction, when just so having avoided the segmentation system of rolling up, with the curved phenomenon of curved system of arc board point portion system, the condition that has the pressure arris on the arc board takes place when also having avoided centering suppression, the arc board can one shot forming, can not harm the panel surface once more, can save the manual work simultaneously, need not carry out the correction of longer time to rolling up the good arc board of system, greatly improve arc board preparation efficiency.
Description
Technical Field
The application relates to the technical field of square and round joint manufacturing, in particular to a smoke duct square and round joint arc plate rolling process adopting a centering method.
Background
Along with the construction and operation of large-scale units of a power plant, a smoke air duct is an indispensable or indispensable part in each construction project of a thermal power plant, the great difficulty in manufacturing square and round sections is a great problem which always influences the manufacturing and installation of the smoke air duct, the smoke air duct can not be formed in one step by adopting the traditional method, the smoke air duct needs to be corrected manually after the mechanical processing is finished, the time and the labor are wasted, the quality is difficult to control, and the manufacturing quality of the smoke air duct square and round section arc plate can not be met according to the conventional processing method and the manufacturing experience accumulated in each project in the past.
The conventional manufacturing method can be divided into the procedures of respectively blanking and manufacturing a flat plate and an arc plate and then combining the flat plate and the arc plate, but the processing method for manufacturing the arc plate with the round mouth part has low efficiency and poor forming quality, and cannot meet the requirements of drawings and the on-site construction quality.
Disclosure of Invention
The invention aims to provide a smoke duct square-round segment arc plate rolling process adopting a centering method, so as to solve the problems in the prior art in the background technology.
A process for rolling a square and round segmental arc plate of a flue gas duct by adopting a centering method comprises the following steps:
s1, manufacturing a centering die, fixing the centering die to the end of the plate bending machine by using a bolt, and lifting the centering die along with the upper roller of the plate bending machine;
s2, manufacturing a semicircular plate, and cutting the semicircular plate according to the size of the square and round sections of the smoke and air duct;
s3, welding round steel matched with the centering die at the tip of the circle center of the semicircular plate to serve as a centering shaft;
s4, placing the semicircular plate with the round steel on the lower roller of the plate bending machine, and inserting the round steel into a centering die, so that the semicircular plate can rotate by taking the round steel as the center of a circle, and the rolling direction is continuously adjusted;
and S5, pressing the semicircular plate by adjusting the pressure below the upper roller of the plate bending machine to deform the semicircular plate under stress, and bending the semicircular plate into an arc-shaped plate to form the square and circular arc plate of the smoke duct in one step.
Preferably, in S1, a centering hole is formed in the centering mold, a bearing matched with the round steel is fixed inside the centering hole, and the round steel is inserted into an inner ring of the bearing.
Preferably, in S2, when the semicircular plate is cut, the semicircular plate is drawn on the raw material plate and cut by a laser cutter.
Preferably, in S3, before welding the round steel, an opening matched with the thickness of the semicircular plate is formed on one side of the round steel, the tip of the semicircular plate is cut into a flat opening, and the opening on the round steel is sleeved at the flat opening during welding.
Preferably, in S4, before the semicircular plate is placed on the lower roller of the plate bending machine, the surfaces of the lower roller, the upper roller and the semicircular plate of the plate bending machine are cleaned, and the lubricating oil is uniformly applied to the surfaces of the lower roller and the upper roller of the plate bending machine.
Preferably, the step S5 further includes: and taking the formed square and circular arc plates of the flue gas duct down from the plate bending machine, then cutting the round steel, and detecting the size of the square and circular arc plates of the finished flue gas duct.
Preferably, the size parameters of the arc plates of the square and round sections of the finished product smoke duct comprise: and roundness and diameter, and deviation of side length and diagonal line detected by using the straight ruler, the bent ruler and the roundness meter.
Preferably, after the semicircular plate is cut, the cut edge of the semicircular plate is ground to keep the edge smooth.
Preferably, when welding the round bar, the reinforcing member is welded to the outer portion of the round bar and the flat mouth of the semicircular plate.
Preferably, the reinforcement is provided as an arch.
The invention has the beneficial effects that: adopt the centering system method of rolling up to the arc board to roll up system processing, the arc board uses point portion to rotate as the center when rolling up, constantly adjust system direction, when just so having avoided the segmentation system of rolling up, with the curved phenomenon of curved system of arc board point portion system, the condition that has the pressure arris on the arc board takes place when also having avoided centering suppression, the arc board can one shot forming, can not harm the panel surface once more, can save the manual work simultaneously, need not carry out the correction of longer time to rolling up the good arc board of system, greatly improve arc board preparation efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic view of a semicircular plate according to the present invention in a swinging state;
FIG. 2 is a schematic view of the joint between the round steel and the semicircular plate according to the present invention;
fig. 3 is a schematic cross-sectional view of a centering mold according to the present invention.
Reference numerals: 1. centering the mold; 2. a centering hole; 3. round steel; 4. a bearing; 5. a semicircular plate; 6. an opening; 7. a reinforcement; 8. and a lower roller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Example 1
Referring to fig. 1-3, a process for rolling a square-round segment arc plate of a flue gas duct by using a centering method comprises the following steps:
s1, manufacturing a centering die 1, fixing the centering die to the end of a plate bending machine by using bolts, and lifting the centering die along with an upper roller of the plate bending machine;
a centering hole 2 is formed in the centering die 1, a bearing 4 matched with the round steel 3 is fixed inside the centering hole 2, and the round steel 3 is inserted into an inner ring of the bearing 4;
s2, manufacturing the semicircular plate 5, and cutting the semicircular plate 5 according to the size of the square and round section of the smoke air duct;
when the semicircular plate 5 is cut, firstly, the shape of the semicircular plate 5 is drawn on the original material plate, a laser cutting machine is used for cutting, and after the semicircular plate is cut, the cut edge of the semicircular plate 5 is polished to keep the edge smooth;
s3, welding round steel 3 matched with the centering die 1 at the point of the center of the semicircular plate 5 to serve as a centering shaft;
before welding the round steel 3, forming an opening 6 matched with the thickness of the semicircular plate on one side of the round steel 3, cutting the tip end of the semicircular plate 5 into a flat opening, sleeving the opening 6 on the round steel 3 at the flat opening during welding, welding a reinforcing piece 7 outside the round steel 3 and at the flat opening of the semicircular plate 5, wherein the reinforcing piece 7 is of an arch structure;
s4, placing the semicircular plate 5 with the round steel 3 on the lower roller 8 of the plate bending machine, and inserting the round steel 3 into the centering die 1, so that the semicircular plate 5 can rotate by taking the round steel 3 as the center of a circle, and the bending direction is continuously adjusted;
before the semicircular plate 5 is placed on the lower roller 8 of the plate bending machine, the surfaces of the lower roller, the upper roller and the semicircular plate of the plate bending machine are cleaned, and lubricating oil is uniformly coated on the surfaces of the lower roller and the upper roller of the plate bending machine;
s5, pressing the semicircular plate by adjusting the lower pressure of the upper roller of the plate bending machine to deform the semicircular plate under stress, and bending the semicircular plate into an arc-shaped plate to form the square and round segmental arc plate of the smoke duct at one time;
s6, take off the flue gas wind channel square-circle segment arc plate after the shaping from the veneer reeling machine, then with round steel 3 excision to detect the size of finished product flue gas wind channel square-circle segment arc plate, detect the size parameter of finished product flue gas wind channel square-circle segment arc plate and include: and roundness and diameter, and deviation of side length and diagonal line detected by using the straight ruler, the bent ruler and the roundness meter.
Example 2
The centering rolling method is a rolling method which can freely rotate one end of an arc plate, freely rotate the arc plate in the same plane by taking a tip part as a center in the rolling process, and continuously adjust the rolling direction so as to achieve the purpose of arc plate forming.
The arc plate is not required to be equally divided by adopting centering rolling, and the rolling radius of the arc plate is gradually reduced from the round opening part to the tip part until the rolling radius of the tip part is 0 mm;
the centering die is specially manufactured and fixed to the end of the plate bending machine by using bolts, can ascend and descend along with the upper roller, a round steel is welded at the tip of the arc plate to serve as a centering shaft, the arc plate rotates by taking the tip as the center when penetrating into the die and being rolled, the rolling direction is continuously adjusted, and the arc plate can be formed at one time to achieve the expected effect;
adopt the centering system method of rolling up to the arc board to roll up system processing, the arc board uses point portion to rotate as the center when rolling up, constantly adjust system direction, when just so having avoided the segmentation system of rolling up, with the curved phenomenon of curved system of arc board point portion system, the condition that has the pressure arris on the arc board takes place when also having avoided centering suppression, the arc board can one shot forming, can not harm the panel surface once more, can save the manual work simultaneously, need not carry out the correction of longer time to rolling up the good arc board of system, greatly improve arc board preparation efficiency.
In summary, the following steps: the arc plate rolled by the centering rolling method can effectively control the accumulated error in the rolling process, creates good conditions for the butt joint work of riveting processing, and improves the butt joint efficiency; meanwhile, the construction requirement and the quality control requirement are met, and a good construction method is provided for manufacturing and rolling the special-shaped parts of the large-scale thermal power generating unit in future;
when rolling up, the arc plate uses point portion to rotate as the center, and the direction of rolling up is constantly adjusted, so when having avoided the segmentation system of rolling up, with the arc plate point portion system curved phenomenon, the condition that has the pressure arris on the arc plate when also having avoided centering suppression takes place, but the arc plate one shot forming can not harm the panel surface once more, can save the manual work simultaneously, need not carry out the correction of longer time to rolling up the good arc plate, greatly improve arc plate preparation efficiency. Meanwhile, the centering rolling method is adopted to overcome various defects in the manufacturing process of the square and round segmental arc plate of the flue gas duct, such as the radian of the arc plate can not meet the requirement, the error of the ovality of a round opening is large, and the like.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A process for rolling a square and round segmental arc plate of a flue gas duct by adopting a centering method is characterized by comprising the following steps:
s1, manufacturing a centering die, fixing the centering die to the end of the plate bending machine by using a bolt, and lifting the centering die along with the upper roller of the plate bending machine;
s2, manufacturing a semicircular plate, and cutting the semicircular plate according to the size of the square and round sections of the smoke and air duct;
s3, welding round steel matched with the centering die at the tip of the circle center of the semicircular plate to serve as a centering shaft;
s4, placing the semicircular plate with the round steel on the lower roller of the plate bending machine, and inserting the round steel into a centering die, so that the semicircular plate can rotate by taking the round steel as the center of a circle, and the rolling direction is continuously adjusted;
and S5, pressing the semicircular plate by adjusting the pressure below the upper roller of the plate bending machine to deform the semicircular plate under stress, and bending the semicircular plate into an arc-shaped plate to form the square and circular arc plate of the smoke duct in one step.
2. The process for rolling the square and circular segment arc plate of the flue gas duct by the centering method according to claim 1, wherein the process comprises the following steps: and in the S1, a centering hole is formed in the centering die, a bearing matched with the round steel is fixed inside the centering hole, and the round steel is inserted into an inner ring of the bearing.
3. The process for rolling the square and circular segment arc plate of the flue gas duct by the centering method according to claim 1, wherein the process comprises the following steps: in S2, when the semicircular plate is cut, the shape of the semicircular plate is drawn on the raw material plate, and the plate is cut by a laser cutter.
4. The process for rolling the square and circular segment arc plate of the flue gas duct by the centering method according to claim 1, wherein the process comprises the following steps: in the step S3, before the round steel is welded, an opening matched with the thickness of the semicircular plate is formed in one side of the round steel, the tip of the semicircular plate is cut into a flat opening, and the opening in the round steel is sleeved at the flat opening during welding.
5. The process for rolling the square and circular segment arc plate of the flue gas duct by the centering method according to claim 1, wherein the process comprises the following steps: in S4, before the semicircular plate is placed on the lower roller of the plate bending machine, the surfaces of the lower roller, the upper roller and the semicircular plate of the plate bending machine are cleaned, and the lubricating oil is uniformly applied to the surfaces of the lower roller and the upper roller of the plate bending machine.
6. The process for rolling the square and circular segment arc plate of the flue gas duct by the centering method according to claim 1, wherein the process comprises the following steps: the S5 further includes: and taking the formed square and circular arc plates of the flue gas duct down from the plate bending machine, then cutting the round steel, and detecting the size of the square and circular arc plates of the finished flue gas duct.
7. The process for rolling the square and circular segment arc plate of the flue gas duct by the centering method according to claim 6, wherein: the size parameters of the arc plates of the square and round sections of the finished product smoke duct are detected to comprise: and roundness and diameter, and deviation of side length and diagonal line detected by using the straight ruler, the bent ruler and the roundness meter.
8. The process for rolling the square and circular segment arc plate of the flue gas duct by the centering method according to claim 3, wherein: and after the semicircular plate is cut, polishing the cut edge of the semicircular plate to keep the edge smooth.
9. The process for rolling the square and circular segment arc plate of the flue gas duct by the centering method according to claim 4, wherein the process comprises the following steps: when the round steel is welded, the reinforcing piece is welded at the outer part of the round steel and the flat opening of the semicircular plate.
10. The process for rolling the square and circular segment arc plate of the flue gas duct by the centering method according to claim 9, wherein: the reinforcing member is provided in an arcuate configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011435386.0A CN112692127A (en) | 2020-12-10 | 2020-12-10 | Smoke duct square-round segment arc plate rolling process adopting centering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011435386.0A CN112692127A (en) | 2020-12-10 | 2020-12-10 | Smoke duct square-round segment arc plate rolling process adopting centering method |
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| CN112692127A true CN112692127A (en) | 2021-04-23 |
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| CN202011435386.0A Pending CN112692127A (en) | 2020-12-10 | 2020-12-10 | Smoke duct square-round segment arc plate rolling process adopting centering method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003205317A (en) * | 2002-01-11 | 2003-07-22 | Nippon Steel Corp | Forming roll and forming method |
| CN2799119Y (en) * | 2005-05-30 | 2006-07-26 | 王行山 | Five-roller plate bending machine |
| CN201519708U (en) * | 2009-10-14 | 2010-07-07 | 南通超力卷板机制造有限公司 | Upper roll of plate bending machine for facilitating conical tube rolling |
| CN202137233U (en) * | 2011-06-24 | 2012-02-08 | 无锡洲翔重工科技有限公司 | Conical cylinder rolling device |
| CN202824287U (en) * | 2012-08-22 | 2013-03-27 | 中国二十冶集团有限公司 | Three-roller symmetric type veneer reeling machine roll cone auxiliary device |
| CN203330195U (en) * | 2013-05-24 | 2013-12-11 | 铜陵有色兴铜机电制造有限公司 | Plate rolling machine machining conical cylinder |
| CN110405014A (en) * | 2019-07-30 | 2019-11-05 | 中国一冶集团有限公司 | Conical shell rolls equipment |
-
2020
- 2020-12-10 CN CN202011435386.0A patent/CN112692127A/en active Pending
Patent Citations (7)
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|---|---|---|---|---|
| JP2003205317A (en) * | 2002-01-11 | 2003-07-22 | Nippon Steel Corp | Forming roll and forming method |
| CN2799119Y (en) * | 2005-05-30 | 2006-07-26 | 王行山 | Five-roller plate bending machine |
| CN201519708U (en) * | 2009-10-14 | 2010-07-07 | 南通超力卷板机制造有限公司 | Upper roll of plate bending machine for facilitating conical tube rolling |
| CN202137233U (en) * | 2011-06-24 | 2012-02-08 | 无锡洲翔重工科技有限公司 | Conical cylinder rolling device |
| CN202824287U (en) * | 2012-08-22 | 2013-03-27 | 中国二十冶集团有限公司 | Three-roller symmetric type veneer reeling machine roll cone auxiliary device |
| CN203330195U (en) * | 2013-05-24 | 2013-12-11 | 铜陵有色兴铜机电制造有限公司 | Plate rolling machine machining conical cylinder |
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Non-Patent Citations (2)
| Title |
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| 苏志童: "转差支座――卷板机辅助工具", 《锻压技术》 * |
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Application publication date: 20210423 |