CN109647880A - A kind of hot rolling molding process of people's air defense doorframe steel - Google Patents
A kind of hot rolling molding process of people's air defense doorframe steel Download PDFInfo
- Publication number
- CN109647880A CN109647880A CN201811465415.0A CN201811465415A CN109647880A CN 109647880 A CN109647880 A CN 109647880A CN 201811465415 A CN201811465415 A CN 201811465415A CN 109647880 A CN109647880 A CN 109647880A
- Authority
- CN
- China
- Prior art keywords
- hole
- supporting leg
- blank
- people
- hot
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The present invention provides a kind of hot rolling molding process of people's air defense doorframe steel, belong to steel processing technique field, using continuous casting billet as raw material, vertical bar blank is formed in ingredient upper surface by 3 passes of double steel twice using in cogging rough rolling step, diagonal bar blank is formed by 2 passes, secondary supporting leg and supporting leg are formed by 8 passes, last 1 passage of finish rolling completes hot-roll forming processing.Present invention people's air defense doorframe steel produced, one-pass molding, high production efficiency, no open defect, angle is accurate, and thickness is uniform.
Description
Technical field
The invention belongs to steel processing technique fields, and in particular to a kind of hot rolling molding process of people's air defense doorframe steel.
Background technique
People's air defense is larger with doorframe steel market demand, and the production of the doorframe steel of people's air defense currently on the market is mainly by equal leg angle
It is welded (such as Fig. 1, angle steel 3 and band steel diagonal bar 1, vertical bar 2 are welded) with two pieces of band steels, there are poor welding qualities, production
The environmental pollution that is generated in low efficiency, welding, the defects of processing cost is high.
Summary of the invention
The object of the present invention is to provide a kind of people's air defense hot rolling molding process of doorframe steel, one-pass molding, high production efficiency,
People's air defense produced is with doorframe steel without open defect, and angle is accurate, and thickness is uniform.
The present invention provides the following technical solutions:
A kind of hot rolling molding process of people's air defense doorframe steel, comprising the following steps:
S1, selection continuous casting billet are raw material, heat open rolling, are 850 mill milling of Φ, 2 roads in box hole by the first hole
Secondary, the lower rolling surface in first hole is equipped with the arc-shaped table board of protrusion, so that rolled piece metal is forced up flowing, in blank upper surface
Form a step section；
S2,270 ° of rolled piece double steel clockwise for obtaining S1 are 850 mill milling of Φ 1 in box hole by the second hole
Passage, the hot-rolled process give step section face biggish drafts, extend the side of step section and carry out force spreading, are allowed to shape
At vertical bar blank；
S3,90 ° of rolled piece double steel clockwise for obtaining S2 are 850 mill milling of Φ 2 of butterfly pass by third hole
Passage carries out cutting to rolled piece top and the bottom, forms a diagonal bar blank on the side of vertical bar blank；
S4, the rolling for carrying out 2 passages for 850 milling train of Φ of butterfly pass by the 4th hole and the 5th hole respectively, to S3
In vertical bar blank and diagonal bar blank carry out shaping, be formed simultaneously connected secondary supporting leg blank and supporting leg blank；
S5, be by the hole type design of hot-rolling mill the 6th hole of butterfly pass, seven apertures in the human head, octal, the 9th hole, the tenth hole and
11-holes are processed by the hot-rolled process of 6 passages, gradually by vertical bar blank and diagonal bar blank machine-shaping for vertical bar and tiltedly
Muscle, the angle between secondary supporting leg blank and supporting leg blank is gradually excessively to 100 °；
S6, the pass for designing 650 2 roller finish rolling milling train of Φ are the 12nd hole, carry out last one of hot rolling, by secondary supporting leg and
Supporting leg moves toward straightening, while correcting the angle and thickness of vertical bar, diagonal bar, secondary supporting leg and supporting leg, and the heat of people's air defense doorframe steel can be completed
Roll processing and forming.
Preferably, the raw material in the S1 is 250*300 continuous casting billet.
Preferably, it is 1080 ± 20 DEG C that start rolling temperature is heated in the S1.
Preferably, Φ 850 milling train of the S1 into S4 is 850 two-high reversing mill of Φ.
Preferably, the angle in the S4 between the secondary supporting leg blank and supporting leg blank in the 4th hole is 130 °, the pair in the 5th hole
Angle between supporting leg blank and supporting leg blank is 125 °.
Preferably, the hot-rolled process of 3 passages carried out in the S5 with the 6th hole, seven apertures in the human head and octal is using Φ
750I three-high mill, the hot-rolled process of 2 passages carried out with the 9th hole and the tenth hole is using 650 three-high mill of Φ, with the
The hot-rolled process for 1 passage that 11-holes carry out is using 650 duo mill of Φ.
Preferably, the secondary supporting leg of the 6th hole in the S5, seven apertures in the human head, octal, the 9th hole, the tenth hole and 11-holes is young
Angle between shape and supporting leg blank is followed successively by 120 °, 115 °, 110 °, 105 °, 105 ° and 100 °.
Preferably, the angle in the S6 between the secondary supporting leg and supporting leg in the 12nd hole is 90 °.
The beneficial effects of the present invention are:
(1) present invention passes through 3 passes (S1- of double steel twice using in cogging rough rolling step using continuous casting billet as raw material
S2) make to form vertical bar blank in ingredient upper surface；Diagonal bar blank (S3) is formed by 2 passes；It is formed by 8 passes
Secondary supporting leg and supporting leg (S4-S5)；Last 1 passage of finish rolling (S6) completes hot-roll forming processing.
(2) because the section of vertical bar and diagonal bar is smaller, can lead to the problem of pulling-down during the rolling process causes diagonal bar there are charge less
Full phenomenon, the variation in design in secondary supporting leg and supporting leg angle gradually compensate diagonal bar, guarantee the full of filling, production
Product out is without open defect.
(3) present invention is without welding, can one-pass molding, the hot rolling of 14 passages can reduce stress defect, make people produced
Anti- accurate with doorframe steel angle, thickness is uniform.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the people's air defense doorframe steel of prior art production；
Fig. 2 is the structural schematic diagram of the people's air defense doorframe steel of present invention process production；
Fig. 3 a-3l is the structural schematic diagram in corresponding first hole of K14-K1 rolling pass of the present invention to the 12nd hole；
Fig. 4 is the structural schematic diagram of butterfly pass.
In the figure, it is marked as 1, diagonal bar；2, vertical bar；3, angle steel；4, secondary supporting leg；5, supporting leg；6, arc-shaped table board；7, vertical bar is young
Shape；8, diagonal bar blank；9, secondary supporting leg blank；10, supporting leg blank；11, the first hole；12, the second hole；13, third hole；14, the 4th
Hole；15, the 5th hole；16, the 6th hole；17, seven apertures in the human head；18, octal；19, the 9th hole；20, the tenth hole；21,11-holes；
22, the 12nd hole；23, step section.
Specific embodiment
The entire production technology of people's air defense doorframe steel includes hot rolling molding process and aftertreatment technology.
Capital equipment:
1, equipment needed for hot rolling molding process:
1) end inlet side goes out pusher-type furnace one, and heating effective area is 210m2, 80 ton/hours of heating efficiency, fuel
For natural gas.
2) 850 two-high reversing mill of Φ: motor model TDZBS4500-12, U=3100v, power 4500Kw, revolving speed 0-
56/112rpm, 850~1000mm of roller diameter；
3) 750 3 roller bakelite tile milling train of Φ: motor model: YZ132M-4P=7.5kW, revolving speed n=1445r/min power
2500kW main motor, 800~920mm of roller diameter；
4) 650 × 2 milling trains are made of tri- roller of Φ 650I and Φ 650II duo mill: motor model YR3200-12, power
3200kW, revolving speed 497rpm, 720~850mm of body of roll size；
5) bis- roller finishing mill of Φ 650III: motor model YR2500-16/2150, power 2500kW, revolving speed 372r/min,
Dimension of roller: 700~820；
Wherein Φ 850 is roughing mill, and Φ 750I, Φ 650I, Φ 650II are middle milling train, and Φ 650III milling train rolls for finished product
Machine.
2, equipment needed for aftertreatment technology:
1) the fixed hot saw of Φ 1800mm one；
2) stepping beam type cold bed one, cold bed specification: 39 × 51m；
3) one, 1000 straightener of Φ, 8 rollers；
4) abrasive cutoff saw one: device model FTM 1600；
5) one group of rack, band sawing machine two is examined.
Hot rolling molding process
A kind of hot rolling molding process of people's air defense doorframe steel, comprising the following steps:
S1, selection 250*300 continuous casting billet are raw material, and to heat stove heating, start rolling temperature is 1080 ± 20 DEG C, pass through first
Hole 11 is Φ 850 mill milling, 2 passages (K14, K13 passage) in box hole, and the lower rolling surface in the first hole 11 is equipped with protrusion
Arc-shaped table board 6 makes rolled piece metal be forced up flowing, a step section 23 (such as Fig. 3 a) is formed in blank upper surface, for lower road
Secondary strong broadening is prepared；
S2,270 ° of rolled piece double steel clockwise for obtaining S1 are 850 mill milling 1 of Φ in box hole by the second hole 12
A passage (K12 passage), the hot-rolled process give step section face biggish drafts, carry out the side extension of step section forced
Broadening, is allowed to form vertical bar blank 7 (such as Fig. 3 b)；
S3,90 ° of rolled piece double steel clockwise for obtaining S2 are 850 mill milling 2 of Φ of butterfly pass by third hole 13
Rolled piece top and the bottom are carried out cutting by a passage (K11, K10 passage), form a diagonal bar blank 8 on the side of vertical bar blank 7
(such as Fig. 3 c)；
S4, pass through the 4th hole 14 and the 5th hole 15 respectively as 850 milling train of Φ progress, 2 passage (roads K9, K8 of butterfly pass
It is secondary) rolling, in S3 vertical bar blank 7 and diagonal bar blank 8 carry out shaping, be formed simultaneously connected secondary supporting leg blank 9 and branch
Leg blank 10 (such as Fig. 3 d, 3e), the wherein design of butterfly pass are as follows: R1 with R2 value is identical, LH1 with LH2 value is identical, A1 and
A2 value is identical (such as Fig. 4), and the angle between the secondary supporting leg blank 9 and supporting leg blank 10 in the 4th hole 14 is 130 °, the 5th hole 15
Angle between secondary supporting leg blank 9 and supporting leg blank 10 is 125 °；
S5, be by the hole type design of hot-rolling mill the 6th hole 16 of butterfly pass, seven apertures in the human head 17, octal 18, the 9th hole 19,
Tenth hole 20 and 11-holes 21 are processed by the hot-rolled process of 6 passages (K7-K2 passage), gradually by vertical bar blank and diagonal bar
Blank machine-shaping is vertical bar and diagonal bar, in hole type design, to prevent vertical bar and diagonal bar in processing because of rolled piece pulling-down relationship,
Lead to the problem that charge less is full, the leg with muscle gradually give it is upward with pressure, to guarantee secondary supporting leg blank 9 and supporting leg blank 10
It spreads, the design of butterfly pass are as follows: R1 with R2 value is difference identical, LH1 with LH2 value portion is identical, and value is not identical by A1 and A2
(such as Fig. 4), angle between secondary supporting leg blank 9 and supporting leg blank 10 is gradually excessively to 100 ° (such as Fig. 3 f-3k), the 6th hole 16,
Angle between seven apertures in the human head 17, octal 18, the 9th hole 19, the tenth hole 20 and the secondary supporting leg blank 9 and supporting leg blank 10 of 11-holes 21
Degree is followed successively by 120 °, 115 °, 110 °, 105 °, 105 ° and 100 °；
S6, the pass for designing 650 2 roller finish rolling milling train of Φ are the 12nd hole 22, last one of hot rolling are carried out, by secondary supporting leg 4
It is moved toward straightening with supporting leg 5, angle is 90 ° between the two, while correcting the angle and thickness of vertical bar 2, diagonal bar 1, secondary supporting leg 4 and supporting leg 5, i.e.,
The hot-roll forming of achievable people's air defense doorframe steel processes (such as Fig. 3 l).
The present invention is during hot-roll forming:
(1) 7 passages (the first hole to the 5th hole of corresponding S1-S4) of K14-K8 are rolled using a set of 850 two-roller reversible formula of Φ
Machine；
(2) K7 passage (the 6th hole of corresponding S5) uses roll line on a set of Φ 750I three-high mill；
(3) 2 passages seven apertures in the human head and octal of S5 (corresponding) of K6, K5 under a set of Φ 750I three-high mill using rolling
Line；
(4) 2 passages (the 9th hole and the tenth hole of corresponding S5) of K4, K3 passage use a set of Φ 650I three-high mill；
(5) K2 passage (11-holes of corresponding S5) uses a set of Φ 650II duo mill；
(6) K1 passage (the 12nd hole of corresponding S6) uses a set of bis- roller finish rolling milling train of Φ 650III.
Aftertreatment technology
By the doorframe steel semi-finished product of the people's air defense after hot-roll forming, successively pass through hot saw sawing → cooling → aligning → abrasive cutoff saw
Sawing → collecting packing → sawing → storage obtains finished product people's air defense doorframe steel, as shown in Fig. 2, diagonal bar 1, vertical bar 2, secondary supporting leg 4
It is an integral molding structure with supporting leg 5, no open defect, angle is accurate, and thickness is uniform.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of people's air defense hot rolling molding process of doorframe steel, which comprises the following steps:
S1, selection continuous casting billet are raw material, heat open rolling, are Φ 850 mill milling, 2 passages in box hole, institute by the first hole
The lower rolling surface for stating the first hole is equipped with the arc-shaped table board of protrusion, so that rolled piece metal is forced up flowing, is formed in blank upper surface
One step section；
S2,270 ° of rolled piece double steel clockwise for obtaining S1 are Φ 850 mill milling, 1 passage in box hole by the second hole,
The hot-rolled process gives step section face biggish drafts, extends the side of step section and carries out force spreading, is allowed to be formed perpendicular
Muscle blank；
S3,90 ° of rolled piece double steel clockwise for obtaining S2 are 850 mill milling of Φ, 2 roads of butterfly pass by third hole
It is secondary, cutting is carried out to rolled piece top and the bottom, forms a diagonal bar blank on the side of vertical bar blank；
S4, the rolling for carrying out 2 passages for 850 milling train of Φ of butterfly pass by the 4th hole and the 5th hole respectively, in S3
Vertical bar blank and diagonal bar blank carry out shaping, are formed simultaneously connected secondary supporting leg blank and supporting leg blank；
S5, the 6th hole by the hole type design of hot-rolling mill is butterfly pass, seven apertures in the human head, octal, the 9th hole, the tenth hole and the tenth
One hole is processed by the hot-rolled process of 6 passages, is gradually vertical bar and diagonal bar, pair by vertical bar blank and diagonal bar blank machine-shaping
Angle between supporting leg blank and supporting leg blank is gradually excessively to 100 °；
S6, the pass for designing 650 2 roller finish rolling milling train of Φ are the 12nd hole, last one of hot rolling are carried out, by secondary supporting leg and supporting leg
It moves toward straightening, while correcting the angle and thickness of vertical bar, diagonal bar, secondary supporting leg and supporting leg, being rolled into for people's air defense doorframe steel can be completed
Type processing.
2. a kind of hot rolling molding process of people's air defense doorframe steel according to claim 1, which is characterized in that in the S1
Raw material is 250*300 continuous casting billet.
3. a kind of hot rolling molding process of people's air defense doorframe steel according to claim 1, which is characterized in that add in the S1
Hot start rolling temperature is 1080 ± 20 DEG C.
4. a kind of hot rolling molding process of people's air defense doorframe steel according to claim 1, which is characterized in that the S1 to S4
In 850 milling train of Φ be 850 two-high reversing mill of Φ.
5. a kind of hot rolling molding process of people's air defense doorframe steel according to claim 1, which is characterized in that in the S4
Angle between the secondary supporting leg blank and supporting leg blank in four holes is 130 °, the angle between the secondary supporting leg blank and supporting leg blank in the 5th hole
It is 125 °.
6. a kind of hot rolling molding process of people's air defense doorframe steel according to claim 1, which is characterized in that in the S5 with
The hot-rolled process for 3 passages that 6th hole, seven apertures in the human head and octal carry out is using Φ 750I three-high mill, with the 9th hole and the
The hot-rolled process for 2 passages that ten holes carry out is using 650 three-high mill of Φ, with the Hot-roller for 1 passage that 11-holes carry out
Sequence is using 650 duo mill of Φ.
7. a kind of hot rolling molding process of people's air defense doorframe steel according to claim 1, which is characterized in that in the S5
Angle between six holes, seven apertures in the human head, octal, the 9th hole, the tenth hole and the secondary supporting leg blank and supporting leg blank of 11-holes is successively
It is 120 °, 115 °, 110 °, 105 °, 105 ° and 100 °.
8. a kind of hot rolling molding process of people's air defense doorframe steel according to claim 1, which is characterized in that in the S6
Angle between the secondary supporting leg and supporting leg in 12 holes is 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811465415.0A CN109647880B (en) | 2018-12-03 | 2018-12-03 | Hot rolling forming process of doorframe steel for civil air defense |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811465415.0A CN109647880B (en) | 2018-12-03 | 2018-12-03 | Hot rolling forming process of doorframe steel for civil air defense |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109647880A true CN109647880A (en) | 2019-04-19 |
| CN109647880B CN109647880B (en) | 2020-04-03 |
Family
ID=66112290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811465415.0A Active CN109647880B (en) | 2018-12-03 | 2018-12-03 | Hot rolling forming process of doorframe steel for civil air defense |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109647880B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008061233A3 (en) * | 2006-11-16 | 2008-08-07 | Johnson Controls Tech Co | Vehicle seat back frame and method |
| CN105817477A (en) * | 2016-03-22 | 2016-08-03 | 北京金宇顺达科技有限公司 | Manufacturing method for profile steel used for protective seal doorframe |
| CN107413853A (en) * | 2017-08-11 | 2017-12-01 | 张家港联峰钢铁研究所有限公司 | A kind of groove pass and its processing method for Rolling production |
| CN108380669A (en) * | 2018-05-11 | 2018-08-10 | 鞍钢股份有限公司 | A kind of the complete universal last groove and rolling mill practice of rail head side of rail free forming |
-
2018
- 2018-12-03 CN CN201811465415.0A patent/CN109647880B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008061233A3 (en) * | 2006-11-16 | 2008-08-07 | Johnson Controls Tech Co | Vehicle seat back frame and method |
| CN105817477A (en) * | 2016-03-22 | 2016-08-03 | 北京金宇顺达科技有限公司 | Manufacturing method for profile steel used for protective seal doorframe |
| CN107413853A (en) * | 2017-08-11 | 2017-12-01 | 张家港联峰钢铁研究所有限公司 | A kind of groove pass and its processing method for Rolling production |
| CN108380669A (en) * | 2018-05-11 | 2018-08-10 | 鞍钢股份有限公司 | A kind of the complete universal last groove and rolling mill practice of rail head side of rail free forming |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109647880B (en) | 2020-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107649512B (en) | A kind of manufacturing process of 65Mn cold rolling wide strip | |
| CN104525560B (en) | Effective control method of the 30mm cut deal pitted skins of straight carbon steel/Nb bearing steel 20 | |
| KR101609174B1 (en) | Hot Rolled Silicon Steel Producing Method | |
| CN101209459A (en) | Method for cold rolling high silicon electric steel | |
| CN110665962B (en) | Pass system and rolling method of narrow-flange asymmetric steel rail beam hot rolling mill | |
| CN104525562A (en) | Production method of stainless-steel, carbon steel and stainless steel three-layer combined plate coil | |
| CN108165822A (en) | A kind of preparation method of low-intensity, easily molded welded tube TA2 cold rolled titanium bands | |
| CN106636747A (en) | Manufacturing method for producing commercial pure titanium plate by adopting double annealing of heavy and medium plate mill | |
| CN102059248A (en) | Method for producing titanium coil by using normal hot continuous rolling mill | |
| CN103316916A (en) | Square tube former and production method of square tubes | |
| CN103506383B (en) | Super-purity ferrite stainless steel hot rolling making method | |
| CN109622619B (en) | Method for producing high-grade non-oriented electrical steel by cold continuous rolling and product thereof | |
| CN113695403B (en) | Endless rolling method based on temperature uniform control | |
| CN114433638A (en) | Method for controlling transverse unevenness of hot-rolled steel plate with thickness specification of less than or equal to 50mm | |
| CN110153199A (en) | A kind of controlled rolling method of large scale rod bar | |
| CN204276517U (en) | A kind of production line that can replace conventional broadband steel hot continuous rolling | |
| CN110180892A (en) | Titanium steel composite board production method | |
| JPS5921402A (en) | Universal rolling method of rail in continuous rolling plant for h-beam | |
| CN112872027A (en) | Novel rolling process for large H-shaped steel | |
| CN109647880A (en) | A kind of hot rolling molding process of people's air defense doorframe steel | |
| CN113714299B (en) | Rolling mill roller cooling method | |
| CN101524706A (en) | Method for rolling low-carbon high-manganese steel continuously-cast blank in one heat | |
| CN208357553U (en) | The on-line continuous hot bending shape system and production line of hot plate/band | |
| CN203408983U (en) | Square tube squaring machine | |
| CN110153179A (en) | The process of the fiery bearing steel of cooling rolling two |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |