CN103480684A - Method for cold roll forming of D-shaped section steel - Google Patents
Method for cold roll forming of D-shaped section steel Download PDFInfo
- Publication number
- CN103480684A CN103480684A CN201310431687.XA CN201310431687A CN103480684A CN 103480684 A CN103480684 A CN 103480684A CN 201310431687 A CN201310431687 A CN 201310431687A CN 103480684 A CN103480684 A CN 103480684A
- Authority
- CN
- China
- Prior art keywords
- welding
- circular arc
- section
- surplus
- broadening
- 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.)
- Pending
Links
Images
Abstract
The invention provides a method for cold roll forming of D-shaped section steel. The method comprises the steps as follows: 1, blanking: blanking is performed according to the the physical dimension of a product and the sizing margin; 2, circular arc and small edge formation: a double-radius forming method of a round tube is adopted to perform simultaneous formation of a circular arc section and a welded small edge section, wherein the length of the welded small edge section is 22-26 mm, a 4-5 mm straight line section is formed between the circular arc section and the welded small edge section, and the formation is completed in four steps progressively, wherein the four-step forming angles, namely circular arc central angles of the circular arc section are respectively 20 degrees, 40 degrees, 60 degrees and 80 degrees, and the roller forming angles of the welded small edge section are respectively 155 degrees, 132 degrees, 108 degrees and 92 degrees; 3, bottom and waist formation: forming angles of an upper roller and lower rollers are utilized to perform five-time frame formation; 4, roller forming and welding: an extrusion forming method is adopted for the formation of the upper roller and the lower rollers on the two sides, and meanwhile, a solid-state high frequency welding method is adopted for welding; 5, removal of welded outer burrs; 6, fixed-length cutting by a milling saw. According to the invention, a direct formation method is adopted in virtue of the conventional die, and the physical dimension of the product and the circular arc radius R meet the technical requirements.
Description
Technical field
The present invention relates to the comprehensive roll-type forming technology of a kind of clod wash square tube and pipe, be specially a kind of cold bending shaping method of D shape shaped steel.
Background technology
Product category is thousands of so far, technology is also day by day ripe for the clod wash industry development, but along with market improves constantly (section complexity, light-duty property, high strength etc.) to product requirement, Development and Production D shape pipe is not still met the need of market, and is product category to be enriched and improved the needs of the market competitiveness yet.
At present, adopt and justify into square scheme, process design technology is more ripe, but need to make a large amount of moulds, and production cost is higher.If can adopt the straight forming (be circular arc with face moulding simultaneously directly) can be by existing mold, cost-saved 2/3, approximately 180,000 yuan.
Summary of the invention
The objective of the invention is to design a kind of cold bending shaping method that adopts the D shape shaped steel of straight forming by existing mold, reach 1) shape and the physical dimension of controlling product meet standard-required; 2) welding performance meets GB and relevant criterion; 3) be not more than ± 1.5mm of circular arc R deviation; Angle a ± 1.5mm.
Technical scheme of the present invention: the cold bending shaping method of D shape shaped steel of the present invention comprises the steps:
1) blanking: according to the product physical dimension, add the blanking of sizing surplus;
2) circular arc and little edge forming: adopt two radius molding modes of pipe to arc section and the moulding simultaneously of the little limit of welding section, welding little limit segment length is 24 ± 2mm, and apart from welding edge, one section straight line being arranged at circular arc is 4mm～5mm, and moulding divides four steps to go forward one by one;
3) moulding bottom and waist: utilize top and bottom rolls to divide five sortie moulding;
4) roll moulding and welding: adopt topping roll, both sides bottom roll extrusion modling, simultaneously, adopt High Frequency Solid State weldering welding;
5) the outer burr of welding is removed;
6) milling saw fixed ruler cutting.
Described step 2) moulding four steps are: four one-step forming angles of arc section are respectively 20 °, 40 °, 60 °, 80 ° of circular arc central angle; Weld little limit section roll and be respectively 155 °, 132 °, 108 °, 92 ° angles.
The each feeding angle of described step 3) five sortie is all 16 °, is respectively 16 °, 32 °, 48 °, 64 °, 80 ° after feeding.
The outer burr of described welding is removed and is adopted the blade harrow consistent with the circle product external arc.
Described step 1) blanking: calculate rational broadening according to the product physical dimension, increase sizing surplus and welding surplus when calculating broadening; The broadening computing formula is as follows:
B=L+S+a
L is all straightway sums;
S is circular arc neutral line length;
A is the welding surplus, and a=k * t, get k=0.9, and t is wall thickness.
Beneficial effect of the present invention:
The present invention adopts straight forming by existing mold, product size physical dimension and circular arc R reach specification requirement, weldquality is qualified through magnetic powder inspection and ultrasonic examination detection, the every technical parameter of product reaches technical standard, produce 65 tons in batches, lumber recovery reaches 95.66%, higher than theory, becomes a useful person, and has possessed the ability of batch production.
The accompanying drawing explanation:
Fig. 1 is circular arc and little edge forming schematic diagram.
Fig. 2 is arc section four step extrusion modling schematic diagrames.
Fig. 3 is five sortie moulding bottom and waist schematic diagrames.
Fig. 4 is roll moulding and welding schematic diagram.
Fig. 5 is a kind of embodiment finished product sectional view.
Fig. 6 is that outer burr is removed the blade harrow schematic diagram.
The specific embodiment
The cold bending shaping method of D shape shaped steel of the present invention, comprise the steps:
1) blanking: according to the product physical dimension, add the blanking of sizing surplus;
2) circular arc and little edge forming: adopt two radius molding modes of pipe to arc section and the moulding simultaneously of the little limit of welding section, welding little limit segment length is 24 ± 2mm, apart from welding edge, one section straight line being arranged at circular arc is 4mm～5mm, and moulding divides the sealing roller moulding of having gone forward one by one of four steps;
3) moulding bottom and waist: utilize top and bottom rolls to divide five sortie moulding;
4) roll moulding and welding: adopt topping roll, both sides bottom roll extrusion modling, simultaneously, adopt High Frequency Solid State weldering welding;
5) the outer burr of welding is removed;
6) milling saw fixed ruler cutting.
Fig. 1 is circular arc and little edge forming schematic diagram: described step 2) moulding four steps are: four step roll moulding angles of arc section are respectively 20 °, 40 °, 60 °, 80 ° of circular arc central angle; Weld little limit section roll and be respectively 155 °, 132 °, 108 °, 92 ° angles.Fig. 2 is the arc section shaping schematic view.
Fig. 3 is five sortie moulding bottom and waist schematic diagrames: the each feeding angle of described step 3) five sortie is all 16 °, is respectively 16 °, 32 °, 48 °, 64 °, 80 ° after feeding.
Fig. 4 is roll moulding and welding schematic diagram: by topping roll and both sides bottom roll, that product A is qualitative, in rolling process, adopt High Frequency Solid State, the benefit of High Frequency Solid State be power and frequency higher, use special-purpose induction coil, induction coil forms loop in product external surfaces, after energising, produces magnetic induction, utilizes kelvin effect moment to dissolve weld.
Fig. 5 is a kind of embodiment finished product sectional view:
The present embodiment be take D200 * 125 * 6mm as example: according to product physical dimension and wall thickness, the sizing surplus increases 1mm on every limit, and broadening calculates B=575mm.
Fig. 6 is that outer burr is removed the blade harrow schematic diagram:
The outer burr of described welding is removed and is adopted the blade harrow consistent with the circle product external arc.Blade harrow 1 knife edge part beam overall 28～30mm, straight line portion 1a=10mm wherein, all the other are circular arc portion 1b, the R=101mm of circular arc portion 1b.
Described step 1) blanking: calculate rational broadening according to the product physical dimension, increase sizing surplus and welding surplus when calculating broadening; The broadening computing formula is as follows:
B=L+S+a
L is all straightway sums;
S is circular arc neutral line length;
A is the welding surplus, and a=k * t, get k=0.9, and t is wall thickness.
Technological process:
Store → thick moulding → high-frequency welding → outer burr → the air cooling of plane → water-cooled → precisive shaped → finished product aligning → scale sawing of coiled strip steel → material loading uncoiling → crop butt welding → kink → check → pack → weigh, mark → warehouse-in.
The present invention goes out rational broadening and each sortie roller floral diagram by the copra analog computation, then optimizes each sortie roller flower angle according to machine unit characteristic; The a small amount of mould optimization pass of reconditioning is to adapt to circular arc molding; By the reserved suitable straightway (surplus) of weld, be convenient to welding extruding and the planing of outer burr during technological design; Product after utilizing the production built-in unit to welding carries out the bending rectification; Each sortie sizing carries out precisive shaped to product, increases gradually extruding force, until the product physical dimension meets standard-required.
Core of the present invention be circular arc and little edge forming adopt pipe two radius molding modes to arc section and the moulding simultaneously of the little limit of welding section, moulding divides the moulding of going forward one by one of four steps sealing rollers, employing existing mold straight forming.Therefore, two radius molding modes that every circular arc and little edge forming adopt pipe all belong to protection scope of the present invention to arc section and the section while moulding of the little limit of welding.
Claims (7)
1. the cold bending shaping method of a D shape shaped steel, comprise the steps:
1) blanking: according to the product physical dimension, add the blanking of sizing surplus;
2) circular arc and little edge forming: adopt two radius molding modes of pipe to arc section and the moulding simultaneously of the little limit of welding section, welding little limit segment length is 24 ± 2mm, and apart from welding edge, one section straight line being arranged at circular arc is 4mm～5mm, and moulding divides four steps to go forward one by one;
3) moulding bottom and waist: utilize top and bottom rolls to divide five sortie moulding;
4) roll moulding and welding: adopt topping roll, both sides bottom roll extrusion modling, simultaneously, adopt High Frequency Solid State weldering welding;
5) the outer burr of welding is removed;
6) milling saw fixed ruler cutting.
2. the cold bending shaping method of D shape shaped steel according to claim 1, is characterized in that: step 2) moulding four steps are: four one-step forming angles of arc section are respectively 20 °, 40 °, 60 °, 80 ° of circular arc central angle; Weld little limit section roll and be respectively 155 °, 132 °, 108 °, 92 ° angles.
3. the cold bending shaping method of D shape shaped steel according to claim 1 and 2, it is characterized in that: the each feeding angle of step 3) five sortie is all 16 °, is respectively 16 °, 32 °, 48 °, 64 °, 80 ° after feeding.
4. the cold bending shaping method of D shape shaped steel according to claim 1 and 2, is characterized in that: weld outer burr and remove the employing blade harrow consistent with the circle product external arc.
5. the cold bending shaping method of D shape shaped steel according to claim 1 and 2, is characterized in that: the step 1) blanking: calculate rational broadening according to the product physical dimension, increase sizing surplus and welding surplus when calculating broadening; The broadening computing formula is as follows:
B=L+S+a
L is all straightway sums;
S is circular arc neutral line length;
A is the welding surplus, and a=k * t, get k=0.9, and t is wall thickness.
6. the cold bending shaping method of D shape shaped steel according to claim 3, is characterized in that: the step 1) blanking: calculate rational broadening according to the product physical dimension, increase sizing surplus and welding surplus when calculating broadening; The broadening computing formula is as follows:
B=L+S+a
L is all straightway sums;
S is circular arc neutral line length;
A is the welding surplus, and a=k * t, get k=0.9, and t is wall thickness.
7. the cold bending shaping method of D shape shaped steel according to claim 4, is characterized in that: the step 1) blanking: calculate rational broadening according to the product physical dimension, increase sizing surplus and welding surplus when calculating broadening; The broadening computing formula is as follows:
B=L+S+a
L is all straightway sums;
S is circular arc neutral line length;
A is the welding surplus, and a=k * t, get k=0.9, and t is wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310431687.XA CN103480684A (en) | 2013-09-22 | 2013-09-22 | Method for cold roll forming of D-shaped section steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310431687.XA CN103480684A (en) | 2013-09-22 | 2013-09-22 | Method for cold roll forming of D-shaped section steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103480684A true CN103480684A (en) | 2014-01-01 |
Family
ID=49821468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310431687.XA Pending CN103480684A (en) | 2013-09-22 | 2013-09-22 | Method for cold roll forming of D-shaped section steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103480684A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4971240A (en) * | 1989-11-21 | 1990-11-20 | Wallis Bernard J | Method and apparatus for forming heat exchanger tubes |
| JPH07275954A (en) * | 1994-04-11 | 1995-10-24 | Kusakabe Denki Kk | Production of electric resistance welded tube |
| JP3746489B2 (en) * | 2003-03-20 | 2006-02-15 | ナカジマ鋼管株式会社 | Manufacturing method of rectangular steel pipe and manufacturing equipment of rectangular steel pipe |
| CN1788873A (en) * | 2005-11-23 | 2006-06-21 | 何甜灶 | Method and apparatus for producing heterotype tubing using steel plate |
| CN101637787A (en) * | 2009-08-11 | 2010-02-03 | 泰安科诺型钢股份有限公司 | Square and rectangular steel forming technical method |
| CN101708513A (en) * | 2009-05-25 | 2010-05-19 | 北方工业大学 | Process for forming and welding closed-end cold-bent section steel |
| CN101708514A (en) * | 2009-12-17 | 2010-05-19 | 上海佳冷型钢有限公司 | Method for processing open-web sharp-angled rhomboid tube |
| CN102125942A (en) * | 2010-09-07 | 2011-07-20 | 上海豪艺莱冷弯型钢有限公司 | Process for molding cold-bending welded special pipe with trapezoid cross section |
| CN102699107A (en) * | 2012-06-19 | 2012-10-03 | 武汉钢铁(集团)公司 | Cold roll forming method of thin-walled and high-strength square steel tube |
-
2013
- 2013-09-22 CN CN201310431687.XA patent/CN103480684A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4971240A (en) * | 1989-11-21 | 1990-11-20 | Wallis Bernard J | Method and apparatus for forming heat exchanger tubes |
| JPH07275954A (en) * | 1994-04-11 | 1995-10-24 | Kusakabe Denki Kk | Production of electric resistance welded tube |
| JP3746489B2 (en) * | 2003-03-20 | 2006-02-15 | ナカジマ鋼管株式会社 | Manufacturing method of rectangular steel pipe and manufacturing equipment of rectangular steel pipe |
| CN1788873A (en) * | 2005-11-23 | 2006-06-21 | 何甜灶 | Method and apparatus for producing heterotype tubing using steel plate |
| CN101708513A (en) * | 2009-05-25 | 2010-05-19 | 北方工业大学 | Process for forming and welding closed-end cold-bent section steel |
| CN101637787A (en) * | 2009-08-11 | 2010-02-03 | 泰安科诺型钢股份有限公司 | Square and rectangular steel forming technical method |
| CN101708514A (en) * | 2009-12-17 | 2010-05-19 | 上海佳冷型钢有限公司 | Method for processing open-web sharp-angled rhomboid tube |
| CN102125942A (en) * | 2010-09-07 | 2011-07-20 | 上海豪艺莱冷弯型钢有限公司 | Process for molding cold-bending welded special pipe with trapezoid cross section |
| CN102699107A (en) * | 2012-06-19 | 2012-10-03 | 武汉钢铁(集团)公司 | Cold roll forming method of thin-walled and high-strength square steel tube |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103934639B (en) | A kind of thin-walled cold-bending molding technology | |
| CN103317312A (en) | Method for manufacturing finned square rectangular steel tube | |
| CN105127236A (en) | Manufacturing method for special-shaped steel pipes special for logistics shelves | |
| CN103612119A (en) | Stainless steel strip forming equipment for steel-aluminum composite contact rail | |
| CN101823134A (en) | Novel continuous production process of high-precision section copper strip | |
| CN103934638A (en) | Precision external spline pipe forming method | |
| CN104625624A (en) | Manufacturing method and device for double-rim walking wheel | |
| CN102989820A (en) | Manufacturing method for titanium welded pipe | |
| CN102513473B (en) | Continuous roller type cold-roll forming process for stainless steel covering panels of car bodies | |
| CN102672432A (en) | Production process for steel tubes special for shell of vortex type air-conditioning compressor | |
| CN104438432A (en) | Cold-bending and straight-slit high-precision circular pipe molding method | |
| CN103480684A (en) | Method for cold roll forming of D-shaped section steel | |
| CN105312858B (en) | A kind of mold used in submersible sewage pump pump case forming method and this method | |
| CN101543847B (en) | Preparation method of non-gel ultra-thin stainless steel composite tube | |
| CN203330224U (en) | Side cutting die for steering nut | |
| CN104646532A (en) | Hot press forming mold of diversion pipe for ship | |
| CN102773666A (en) | Processing method for square tube of bearing upright post of automobile | |
| CN203391026U (en) | Continuous bean curd dividing machine | |
| CN207508070U (en) | A kind of stamping die for detaching product with waste material during continuous cross cutting | |
| CN103846620A (en) | Special pipe processing technology | |
| CN205393647U (en) | Grid roller shear cuts device | |
| CN203459903U (en) | Metal plate rolling and cutting device | |
| CN107160103A (en) | A kind of preparation method for tubing/section bar that outer wall is complex as based on laminated metal | |
| CN203801592U (en) | Rolling cutters for sesame seed cake dough shaping machine | |
| CN106984664A (en) | Aluminum alloy heat extrudes replaceable mold cores |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140101 |