CN101596678A - A kind of processing method of oval steel member - Google Patents
A kind of processing method of oval steel member Download PDFInfo
- Publication number
- CN101596678A CN101596678A CNA2009100334976A CN200910033497A CN101596678A CN 101596678 A CN101596678 A CN 101596678A CN A2009100334976 A CNA2009100334976 A CN A2009100334976A CN 200910033497 A CN200910033497 A CN 200910033497A CN 101596678 A CN101596678 A CN 101596678A
- Authority
- CN
- China
- Prior art keywords
- circle
- microcephaly
- line
- oval
- power curve
- 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.)
- Granted
Links
Images
Abstract
The invention discloses a kind of processing method of oval steel member, comprising: (one) prepares a block length square plate; (2) setting-out launches, and following each line draws: the expansion circle power curve of microcephaly, major part and the groove that docks circumferential weld with adjacent tubule joint; Totally four on large and small arc transition line; Two side ends pressure head surplus line, headline and longitudinal joint groove, longitudinal joint is arranged on roundlet arc district; The processing bus; (3) Numerical control cutting; (4) pressure head; (5) volume rolls into shape: steel plate is lifted up into veneer reeling machine; Roll up oval orthodrome circle gesture earlier, the oval roundlet arc circle of back volume gesture when the veneer reeling machine top roll presses down, be controlled volume under pressure; When each arc forming of steel plate to 80% the time, the volume under pressure of top roll should change between the 5mm to 2mm; (6) welding:, obtain elliptical tube steel member with rolled steel plate two ends longitudinal seam welding.It is good that the present invention rolls elliptical tube steel member precision, has only half of conventional method process time.
Description
Technical field
The present invention relates to a kind of processing method of steelwork component, the processing method of the oval steel member that particularly a kind of working (machining) efficiency is high.
Background technology
Needing to design a kind of superstructure in process of construction is steel construction, and the part is the building of concrete filled steel tube.Steel superstructure comprises main arch structure, main arch truss structure, mid-level net shell structure, inferior arch and time arch truss structure.Main arch structure maximum span is 116m, and inferior span of arch degree is 36m, and the cross section is oval and circular variable cross-section.Have the dendroid V-arrangement to support on the arch structure, be used for supporting whole roof structure, the V-arrangement supporting section is a conical tube.The arc main arch is that ellipse is deflected into the taper ellipse and is deflected into three kinds of pipes again, and requires to seamlessly transit between the difformity.According to traditional diamond-making technique, do not satisfy the requirement of construction period at all.In order to improve work efficiency, optimize processing technology, satisfy requirement of engineering, so, by analysis, drawn the new machining type method of a cover by the approximate technique of painting of ellipse to being shaped.
Traditional processing mode is to suppress with press then according to the symmetrical down two boards material of figure paper size, and being pressed into two semiellipses closes up again, is combined into an ellipse; To the ellipse of thickness of slab 30,40, minor axis 1400, major axis 1600, how long half girth has 2.2 meters; Not only stupid but also heavy, 10 meters how long a slice will be pressed three day time.And Left on/Left off is very dangerous.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is at the deficiencies in the prior art, and a kind of processing method of oval steel member is provided.
Technical scheme: the invention discloses a kind of processing method of oval steel member, may further comprise the steps:
One, prepare a block length square plate;
Two, setting-out launches, and following each line draws:
Steps A, the microcephaly launch circle power curve 11, major part launch the circle power curve and with the groove of large and small head place circumferential weld;
Step B, totally four on large and small arc transition line is to tell orthodrome district, roundlet arc district and large and small arc transition district;
Step C, two side ends surplus line, four headlines and longitudinal joint groove, longitudinal joint is arranged on roundlet arc district, and the pressure head district is formed in pressure head surplus place and described headline zone;
Wherein, among the step C, the technique of painting of headline is: respectively draw four headlines towards the centre from two side ends surplus line; It is 100mm that major part launches circle power curve place spacing, the roundlet arc center of circle O that is obtained by the cone setting-out when the roundlet arc launches
3, O
4Launch the intersection point of circle power curve with the line of major part punishment point with the microcephaly, be the branch at microcephaly place; Launch district, two orthodrome center of circle O that obtained during by the cone setting-out at orthodrome
1, O
2Launch the intersection point of circle power curve with the line of major part punishment point with the microcephaly, be the branch at microcephaly place;
Step D, processing bus 15: launch circle power curve and major part the microcephaly and launch between the circle power curve: launch the circle power curve spacing 100mm of place branch according to major part, five orthodrome center of circle O that obtain with by the cone setting-out time
1, O
2, O
3, O
4, O
5Launch the intersection point of circle power curve together with the microcephaly, be the branch at microcephaly place;
Step 3, Numerical control cutting may further comprise the steps:
Steps A, for large and small arc transition line, headline and processing bus, the setting-out of dusting earlier during numerical control;
Step B, microcephaly place, major part are sentenced unequal angular velocity and are cut out fan-shaped that setting-out launches, and cut out the groove of microcephaly, major part simultaneously, promptly little, major part and locate groove with the joint of adjacent little tube coupling;
Step 4, pressure head may further comprise the steps:
Steps A is carried out the pre-compaction forming in circular arc district, nearly both sides with hydraulic press press head line, and uses the model inspection, and error is controlled less than 1mm;
Step B after the circular arc district in pressure head district presses, if there is the pressure head surplus to prescind earlier, and holds the longitudinal joint groove successfully;
Step 5, volume rolls into shape, may further comprise the steps:
Steps A is lifted up into veneer reeling machine with steel plate: at first the processing bus on the steel plate will be put to parallel with the topping roll center line;
Step B, the first oval orthodrome circle of volume gesture, the oval roundlet arc circle of back volume gesture, when the veneer reeling machine top roll presses down, the control volume under pressure: during first pressing generally at 30mm, to 20mm, arrive 10mm, the steel plate of formation sub-elliptical again;
Step C, when each arc forming of steel plate to 80% the time, the volume under pressure of top roll should change between the 5mm to 2mm; Till with the model passed examination;
Step 6, welding: rolled steel plate two ends longitudinal seam welding is obtained oval steel member.
Among the present invention, in the step 2, if the 4th headline just in time about the distance≤50mm at large and small arc transition line place, then will be drawn the 5th headline again, and the 5th headline is 150mm apart from the distance of large and small arc transition line.
Among the present invention, volume will constantly change position and the volume under pressure that presses down when rolling in the step 5.
Among the present invention, the every volume of step 5 light plate all will be cleared up the oxide skin that comes off on the workpiece for one time.
Among the present invention, roll up oval orthodrome circle gesture in the step 5 earlier, the oval roundlet arc circle of back volume gesture.
Beneficial effect: processing method of the present invention, it is higher to roll oval steel member efficient, and precision is better, has only half of conventional method process time.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is done further to specify, above-mentioned and/or otherwise advantage of the present invention will become apparent.
Fig. 1 a, Fig. 1 b, Fig. 1 c, Fig. 1 d are taper elliptical tube setting-out expanded view of the present invention.
Schematic diagram after Fig. 2 launches front projection and processes pressure head for taper elliptical tubesheet of the present invention.
The specific embodiment:
Shown in Fig. 1 a, Fig. 1 b, Fig. 1 c and Fig. 1 d: the invention discloses a kind of processing method of oval steel member, may further comprise the steps:
Step 1 is prepared the rectangle steel plate;
Step 2, setting-out launches, and draws:
1., be divided into microcephaly 20, major part 21, large and small head expansion circle power curve 11 and 13, the groove line that large and small head docks with adjacent tube coupling;
2., large and small arc transition line 16;
3., two side ends surplus line 19 and the requirement of longitudinal joint groove;
4., headline 18;
5., processing bus 15;
Step 3, Numerical control cutting may further comprise the steps:
1., the large and small arc transition line 16 that draws earlier that dusts, headline 18 and processing bus 15;
2., Numerical control cutting blanking;
As shown in Figure 2:
Step 4, pressure head may further comprise the steps:
1., with hydraulic press press head line 18 pressure heads, till the model passed examination;
2., prescind surplus, hold the longitudinal joint groove successfully;
Step 5, volume rolls into shape, may further comprise the steps:
1., when putting steel plate into veneer reeling machine, earlier that the processing bus 15 on the steel plate is parallel with the veneer reeling machine top roll;
2., the first oval orthodrome circle of volume gesture, the oval roundlet arc circle of back volume gesture, when the veneer reeling machine top roll presses down, control volume under pressure: during first pressing generally 30mm to 20mm again to about the 10mm, form the steel plate of sub-elliptical;
3., when each arc forming of steel plate during to 80% left and right sides, the volume under pressure of top roll should change into about 5mm to 2mm; Roll into shape till using model 42 passed examinations until progressively rolling up.
Step 6, welding and correction:
1., rolled steel plate two ends longitudinal seam welding is obtained oval steel member;
2., send the elliptical tube that welds back to veneer reeling machine and return and roll correction, till qualified;
Among the present invention, when volume rolls in veneer reeling machine in the step 5, to constantly change position and the volume under pressure that presses down when top roll presses down, thereby prevent that strong curved or overvoltage from appearring in circular arc.
The every volume of step 5 light plate all will be cleared up the oxide skin that comes off on the workpiece for one time.
Roll up oval orthodrome circle gesture in the step 5 earlier, the oval roundlet arc circle of back volume gesture.
When the 4th headline 18 and large and small arc transition line 16 distances are in≤50mm scope, should draw the 5th headline again, and the 5th headline is about 150mm from large and small arc transition linear distance.
More particularly, be the side view of taper elliptical tube as Fig. 1 a, for major part, upward be the microcephaly down; Fig. 1 b is the axonometric drawing of taper elliptical tube; Fig. 1 c is major part 21 and microcephaly's 20 a vertical view, b among the figure
c, b '
cBe major part, microcephaly's transverse, a
d, a '
dEllipse short shaft for major part, microcephaly; As the expanded view of Fig. 1 d taper elliptical tubesheet and shown in Figure 2:
Processing sequence of the present invention: technology, setting-out, cutting, pressure head, cutting surplus and open the longitudinal joint groove, roll, electric welding, set round.
Step 1, setting-out:
Roll butt joint according to situation segmentation, merogenesis such as thickness of slab, shape, length, nodes.Every joint is little up and down, major part all launches by the drawing arc section, should the good arc transition line 16 of bullet on spread material, and simultaneously, for avoiding the weld seam cross crotch, the longitudinal joints between the two joint cylindrical shells should stagger more than 100 millimeters up and down, and longitudinal joint should be selected in roundlet arc district.
Step 2, setting-out comprise:
Step 1,40mm is thick, 30mm is thick, the ellipse of major axis 1600mm, minor axis 1400mm, presses central core and launches, and girth deducts 4mm, promptly in the arc length of oval two the symmetrical circular arcs of the approximate practice, respectively deducts 1mm.And respectively mark fourth gear headline 18 in the two side ends of spread material: every grade of major part circle power curve 13 spacing 100mm of place, and with five center of circle Os of these branches when launching by cone
1～O
5Link to each other,, be the branch at microcephaly place with the intersection point at microcephaly's circle power curve 11 places.This corresponding 2 line is headline 18.
Step 2,30mm is thick, the ellipse of major axis 1600mm, minor axis 1400mm, presses central core and launches, and girth deducts 2mm, promptly in the arc length of oval two the symmetrical circular arcs of the approximate practice, respectively deducts 0.5mm.Mark headline 18 equally, the mark fourth gear, the every grade of 100mm in major part place, microcephaly locate intersection point and ask method to ask method identical with headline in the step 1.
Step 3, thick, the thick oval band of the 30mm taper of 40mm, the thick 4mm of deducting of the same 40mm of center deployment length, the 30 thick 2mm that deduct.Mark headline 18 equally, fourth gear: every grade is benchmark with major part 100mm, and the microcephaly locates according to trying to achieve with step 1.
The round power curve 13 and 11 of step 4, the large and small head that draws; Large and small arc transition line 16, headline 18 and processing bus 15.Processing bus 15 is 100mm in the spacing at major part circle power curve 13 places, and the microcephaly asks at the place in method and the step 1 headline to ask method identical.
Step 5, in order to reduce to roll difficulty, during the mark headline, normal condition mark fourth gear, but fourth speed is if just in time at arc transition line limit≤50mm, the 5th headline just should exceed about arc transition line 150mm.
Three, Numerical control cutting comprises:
Step 1 before the Numerical control cutting, circle gesture transition wire 16, headline 18 and processing bus 15, is all finished by the numerical control setting-out of dusting earlier, cuts after the setting-out of dusting earlier.
Step 2, the groove at two side ends longitudinal joint place: because of thick 30mm plate does not have the pressure head surplus, so the thick divided edge of steel plate of 30mm can cut earlier; And to thickness greater than the steel plate more than the 40mm because of the pressure head surplus is arranged, then should first pressure head after, cut the surplus bevel again.
Step 3 behind the thick steel plate pressure head of 40mm, should make the surplus line of other end earlier with a headstock sky, in the job area of semi-automatic cutting horizontal position, promptly causes the commissure can conveniently use semi-automatic cutter to cut.
Four, pressure head comprises:
Step 1, according to the processing sketch, do the special-purpose radius gauge 42 of two covers:
Step is two orthodrome processing models 1., the circular arc of long 500mm, each one at wherein large and small head place;
Step is two roundlet arc processing models 2.; Long about 500mm, each one at wherein large and small head place;
3. step does two in addition, the processing model of large and small arc transition line 16 place's annex circular arcs, and each one two kinds different radius arc length of wherein large and small head place respectively are 300.
Step 2 as shown in Figure 2, is reviewed the size at each position of plate, and the transition wire between the different circular arcs is carried out mark, and stamps foreign dotting punch.The distance of headline 18 is generally 100mm * 4 grade at the major part place, if the 4th grade just in time near large and small round gesture transition 16 places (≤50mm) time, should sign in again above the about 150mm of arc transition line.
Step 3, as shown in Figure 2, pressure head joint and suitable after in order to ensure electric welding to the circular arc at pressure head place, should only allow about empty 1mm with the model check;
Step 4 is cut surplus and is opened vertical groove: behind longitudinal joint place pressure head, will cut and hold successfully groove earlier during if any surplus 17; Behind the pressure head as no surplus, but groove should be held groove (because when no surplus, being minimizing pressure head error, so first not bevel) successfully when not opening again, should guarantee that longitudinal joint line place, two side end faces is straight.
Step 5, roll, comprising:
Step 1 is partly tested to the pre-bending pressure head with special-purpose model, as is pinpointed the problems, and can roll after should correcting earlier.
Step 2 is seen Fig. 2, and center line that each is regional and large and small arc transition line 16 cause the end face that two terminations are large and small head, is convenient to differentiate the position of major and minor axis and arc transition line 16; Each regional arc length size is checked, confirmed to roll after errorless.
Step 3, when putting plate into veneer reeling machine, earlier that the processing bus 15 on the material is parallel with the veneer reeling machine top roll.
Step 4 is rolled up orthodrome circle gesture earlier, back volume roundlet arc circle gesture; When top roll presses down, control volume under pressure: during first pressing generally 30 millimeters, to 20 millimeters, again to 10 millimeter.
Step 5 whenever presses down once all should carry out and presses down data record, and every volume all will be cleared up the oxide skin that comes off on the workpiece for one time.
Step 6, when each arc forming to percent of elliptical tube 80 left and right sides, the volume under pressure of top roll should change 5 millimeters into to 2 millimeter.
Step 7 strong curved or overvoltage occurs in order to prevent circular arc, will constantly change position and the volume under pressure that presses down when pressing down.
Step 8, prevent that workpiece from taking off head: pre-bending just partly forwards the top roll place to and soars, and top roll loses pressure, and workpiece shift causes the dislocation of vertical masonry joint limit or safety is brought serious hidden danger.
Step 9, when the workpiece volume will constantly detect with model when rolling: the circular arc of especially large and small arc transition 16 place's annexes should overlap with model, error≤± 2.
Step 10 is carried out outer perimeter to the elliptical tube of spooling and is measured, and girth should be controlled in 0 ± 2 millimeter.
Six, correct after the electric welding:
The longitudinal joint of elliptical tube, through after the electric welding, more or less distortion.For the ease of docking vertical circumferential weld, the control edges of boards are poor, must correct through veneer reeling machine after welding again.Detect with model earlier during rectification,, carry out mark with slate pencil or chalk to detecting overproof position.With top roll the not enough location point of arc gesture is pressed or rolled back and forth.It is reached till the requirement.Also be to roll up orthodrome circle gesture, back volume roundlet arc circle gesture earlier during rectification.
The invention provides a kind of thinking and method of processing method of oval steel member; the method and the approach of this technical scheme of specific implementation are a lot; the above only is a preferred implementation of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each component part not clear and definite in the present embodiment is realized.
Claims (4)
1, a kind of processing method of oval steel member is characterized in that, may further comprise the steps:
(1) prepares a block length square plate;
(2) setting-out launches, and following each line draws:
(A) microcephaly launch circle power curve (11), major part launch circle power curve (13) and with the groove of large and small head place circumferential weld;
(B) large and small arc transition line is totally four, to tell orthodrome district (14), roundlet arc district (12) and large and small arc transition district (16);
(C) two side ends surplus line (19), four headlines (18) and longitudinal joint groove, longitudinal joint is arranged on roundlet arc district (12), and the pressure head district is formed in pressure head surplus place (17) and described headline (18) zone;
Wherein, in the step (C), the technique of painting of headline (18) is: respectively draw four headlines towards the centre from two side ends surplus line (19); It is 100mm that major part expansion circle power curve (13) is located spacing, the roundlet arc center of circle O that is obtained by the cone setting-out when the roundlet arc launches
3, O
4Launch the intersection point of circle power curve (11) with the line of major part punishment point with the microcephaly, be the branch at microcephaly place; Launch district, two orthodrome center of circle O that obtained during by the cone setting-out at orthodrome
1, O
2The line that launches circle power curve (13) punishment point with major part launches the intersection point of circle power curve (11) with the microcephaly, is the branch at microcephaly place;
(D) processing bus (15): launch circle power curve (11) and major part the microcephaly and launch between the circle power curve (13): launch round power curve (13) according to major part and locate spacing 100mm branch, five orthodrome center of circle O that obtain with by the cone setting-out time
1, O
2, O
3, O
4, 0
5Launch the intersection point of circle power curve (11) together with the microcephaly, be the branch at microcephaly place;
(3) Numerical control cutting may further comprise the steps:
(A) for large and small arc transition line (16), headline (18) and processing bus (15), the setting-out of dusting earlier during numerical control;
(B) microcephaly place, major part are sentenced unequal angular velocity and are cut out fan-shaped that setting-out launches, and cut out the groove at microcephaly, major part place simultaneously;
(4) pressure head may further comprise the steps:
(A) carry out the pre-compaction forming in circular arc district, nearly both sides with hydraulic press press head line (18), and use the model inspection, error is controlled less than 1mm;
(B) after the circular arc district in pressure head district presses,, and hold the longitudinal joint groove successfully if there is pressure head surplus (17) to prescind earlier;
(5) volume rolls into shape, may further comprise the steps:
(A) steel plate is lifted up into veneer reeling machine: at first the processing bus (15) on the steel plate will be put to parallel with the topping roll center line;
(B) the first oval orthodrome circle of volume gesture, the oval roundlet arc circle of back volume gesture, when the veneer reeling machine top roll presses down, the control volume under pressure: during first pressing generally at 30mm, to 20mm, arrive 10mm, the steel plate of formation sub-elliptical again;
(C) when each arc forming of steel plate to 80% the time, the volume under pressure of top roll should change between the 5mm to 2mm; Till with the model passed examination;
(6) welding: rolled steel plate two ends longitudinal seam welding is obtained oval steel member.
2, the processing method of a kind of oval steel member according to claim 1, it is characterized in that, in the step (two), if the 4th headline is just in time about the distance≤50mm at large and small arc transition line place, then will draw the 5th headline again, and the distance of the 5th large and small arc transition line of headline distance is 150mm.
3, the processing method of a kind of oval steel member according to claim 1 is characterized in that, volume changes position and the volume under pressure that presses down gradually in the step (five) when rolling.
4, the processing method of a kind of oval steel member according to claim 1 is characterized in that, the every volume of step (five) light plate all will be cleared up the oxide skin that comes off on the workpiece for one time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910033497 CN101596678B (en) | 2009-06-15 | 2009-06-15 | Method for processing oval steel member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910033497 CN101596678B (en) | 2009-06-15 | 2009-06-15 | Method for processing oval steel member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101596678A true CN101596678A (en) | 2009-12-09 |
| CN101596678B CN101596678B (en) | 2011-03-16 |
Family
ID=41418364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910033497 Active CN101596678B (en) | 2009-06-15 | 2009-06-15 | Method for processing oval steel member |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101596678B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091730A (en) * | 2010-11-30 | 2011-06-15 | 重庆建设摩托车股份有限公司 | Bending method used in fabrication of metal elbow pipe |
| CN104551580A (en) * | 2013-10-11 | 2015-04-29 | 珠海格力电器股份有限公司 | Method for manufacturing heat exchanger shell tube for central air-conditioner |
| CN106500949A (en) * | 2016-10-31 | 2017-03-15 | 武汉冶钢结构有限责任公司 | A kind of wind-tunnel round corner section elliptical ring housing forming method |
| CN111014370A (en) * | 2019-12-18 | 2020-04-17 | 湖南雅清环保科技有限公司 | Oval sleeve pipe apparatus for producing |
| CN115673694A (en) * | 2023-01-03 | 2023-02-03 | 内江东工设备制造股份有限公司 | Manufacturing method of oversized steel bifurcated pipe |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2511649C3 (en) * | 1975-03-18 | 1978-10-19 | Franz 7992 Tettnang Rothfuss | Round bending machine for the production of a truncated cone from sheet metal in the shape of a circular ring segment |
| DE4426414A1 (en) * | 1994-07-26 | 1996-02-01 | Gerd Ising | Device for producing cylindrical and cone-shaped workpieces from flat sheet |
| SE508883C2 (en) * | 1996-05-24 | 1998-11-16 | Ribea Engineering Ab | Rolling process and machine for making a conical sheath of sheet metal, and material for this |
| CN2796882Y (en) * | 2004-12-27 | 2006-07-19 | 张先荣 | Roller type veneer reeling machine of reeling conical drum |
| CN2799119Y (en) * | 2005-05-30 | 2006-07-26 | 王行山 | Five-roller plate bending machine |
-
2009
- 2009-06-15 CN CN 200910033497 patent/CN101596678B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091730A (en) * | 2010-11-30 | 2011-06-15 | 重庆建设摩托车股份有限公司 | Bending method used in fabrication of metal elbow pipe |
| CN104551580A (en) * | 2013-10-11 | 2015-04-29 | 珠海格力电器股份有限公司 | Method for manufacturing heat exchanger shell tube for central air-conditioner |
| CN106500949A (en) * | 2016-10-31 | 2017-03-15 | 武汉冶钢结构有限责任公司 | A kind of wind-tunnel round corner section elliptical ring housing forming method |
| CN111014370A (en) * | 2019-12-18 | 2020-04-17 | 湖南雅清环保科技有限公司 | Oval sleeve pipe apparatus for producing |
| CN115673694A (en) * | 2023-01-03 | 2023-02-03 | 内江东工设备制造股份有限公司 | Manufacturing method of oversized steel bifurcated pipe |
| CN115673694B (en) * | 2023-01-03 | 2023-03-03 | 内江东工设备制造股份有限公司 | Manufacturing method of oversized steel bifurcated pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101596678B (en) | 2011-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101596678B (en) | Method for processing oval steel member | |
| CN102029503B (en) | Method for forming right cone stainless steel tank | |
| CN107263031A (en) | Cylinder is without pre-bending edge rolling moulding process | |
| CN102513787B (en) | Process for production line of an ocean engineering structural steel pipes | |
| CN105081683B (en) | Vertical masonry joint steel pipe crimping processing technology | |
| CN104227182B (en) | The moulding process of the main weld seam of joist steel unclear completepenetration I level component | |
| CN103510714A (en) | Welding and construction method for cross-shaped steel pillar | |
| CN105710607B (en) | A kind of manufacturing method of nuclear steam generator taper shell ring | |
| CN107081346A (en) | It is a kind of not wait the method that wall thickness arc makes large diameter steel pipe with two pieces | |
| CN107378407A (en) | The construction method of pipe steel member is mutually passed through in a kind of heavy in section | |
| CN108480987A (en) | A kind of tunnel steel arch frame mechanized production system | |
| CN109604980A (en) | A kind of manufacturing method of long cylindrical mould structural member | |
| CN101386041B (en) | Cold roll forming technique of large-sized curve type steel tube | |
| CN109262205A (en) | Monocline roll system adapter tube manufacturing method | |
| CN204321394U (en) | A kind of thin plate splicing weld industry device | |
| CN104438432A (en) | Cold-bending and straight-slit high-precision circular pipe molding method | |
| CN110453849A (en) | A kind of longitudinal direction thickens I-steel | |
| CN206527178U (en) | A kind of Straight Welded Pipe welding production line | |
| CN103659180B (en) | The shaping splicing method of manufacturing technology of main shaft of large water turbine cold breakdown | |
| CN104722938A (en) | Barrel defect welding repair method | |
| CN104985280A (en) | Welding procedure method for ore pulp pipe to slip mass, collapse body and earthquake fault zone | |
| CN201376177Y (en) | Installation and adjustment clamp for assembly with assembling sphere bulk method in construction | |
| CN204075529U (en) | The transition structure of I-steel main weld not back chipping full penetration I level component | |
| CN103722298B (en) | A kind of panel double-side Butt Joint root gap with bonding control method | |
| CN209338929U (en) | Groove-shape rail bending track device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |