CN102825064A - Method and device for applying prestressing force onto hot-rolled steel angle - Google Patents
Method and device for applying prestressing force onto hot-rolled steel angle Download PDFInfo
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- CN102825064A CN102825064A CN2012103251996A CN201210325199A CN102825064A CN 102825064 A CN102825064 A CN 102825064A CN 2012103251996 A CN2012103251996 A CN 2012103251996A CN 201210325199 A CN201210325199 A CN 201210325199A CN 102825064 A CN102825064 A CN 102825064A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 88
- 239000010959 steel Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005096 rolling process Methods 0.000 claims abstract description 102
- 238000005482 strain hardening Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 abstract description 10
- 229910000746 Structural steel Inorganic materials 0.000 abstract 2
- 238000003754 machining Methods 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013036 cure process Methods 0.000 description 1
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Abstract
The invention discloses a method and device for applying a prestressing force onto a hot-rolled steel angle. The method comprises the following steps of: sequentially carrying out high-pressure rolling, machining and hardening treatment on two sides of the steel angle, and carrying out case-hardened rolling on two sides of the angle iron. The device comprises rolling rollers, high-pressure oil cylinders and transporters, wherein at least three sets of the rolling rollers are available; each set of the rolling rollers are driven by the rolling of the high-pressure oil cylinders, and the force applied onto the rolling rollers of the high-pressure oil cylinders is not less than 20 thousands of kilograms; each set of the rolling rollers comprise a convex roller and a concave roller, which are matched with each other, the convex rollers and the concave rollers are arranged on a support body by shafts, and the convex rollers are further connected and fixed with the high-pressure oil cylinders by slideable connecting bodies; and a clearance fit of which the minimum clearance is equal to zero is formed at the outer surfaces of two sides of the slideable connecting bodies and the wall of the support body. According to the invention, the prestressing force is applied onto standard sections, so that the machining treatment can be carried out, and the tensile strength of the material can be improved manifold. The detection shows that the tensile strength of the angle iron is larger than 800MPa after the steel angle is machined.
Description
Technical field
The invention belongs to the metal material processing technical field, especially belong to metal material flow harden processing technique field, the particularly pressure rolling of hot-rolled profile processing.
Background technology
Widely used angle steel in all kinds of engineering constructions; The tensile strength of Q235 national standard section bar angle steel is 375～460MPa, is receiving external force above after the yield limit, though do not reach strength degree; Also permanent deformation can take place; Usually solution is exactly to select the section bar of bigger specification for use, but this method not only increases cost, has also increased material weight.
How select for use under the specification condition not changing the section bar angle steel, improve the performance of section bar angle steel, is making great efforts exploration in material processing field at present always.
Summary of the invention
The present invention discloses according to the deficiency of prior art and a kind of hot-rolled angle steel has been applied prestressed method and device thereof.First problem that the present invention will solve provides and a kind ofly through high knobbling rolls hot-rolled angle steel is applied prestressing method; Second problem that the present invention will solve provides the above-mentioned hot-rolled angle steel of a kind of realization and applies prestressed device.
The present invention applies prestressing method to hot-rolled angle steel and realizes through following technical scheme:
Hot-rolled angle steel applies prestressing method, it is characterized in that: use high knobbling rolls, successively the high pressure pressure rolling is carried out on the angle steel both sides respectively, realize that work hardening handles, more simultaneously to the pressure rolling of finalizing the design of angle steel both sides.
Said successively the angle steel both sides to be carried out that high pressure pressure rolling work hardening handles respectively be that at least one group of pressure rolling pair roller carries out high pressure pressure rolling work hardening on one side to angle steel and handle, and by at least one group of pressure rolling pair roller angle steel carried out high pressure pressure rolling work hardening again and handle.
Above-mentionedly successively high pressure pressure rolling work hardening is carried out on the angle steel both sides respectively and is handled, be since hot-rolled angle steel in the operation of rolling, the relative thickness of two vertical panels there are differences, the flatness and the thickness of each panel also there are differences.So the first road roll is to place, have under the effect of automatic centering centering function at angle steel vertical plane V font, with two surface ratios of angle steel than thickness and through flow harden centering thickness.
The second road roll be with the first road roll turns to, rotating speed the is identical condition under, rely on angle steel vertical plane V font to place, have under the effect of automatic centering centering function, two surfaces of angle steel are reached the flow harden index of basically identical.
Said is that at least one group of pressure rolling pair roller is simultaneously to the pressure rolling of finalizing the design of angle steel both sides to the pressure rolling of finalizing the design of angle steel both sides simultaneously.
The 3rd road roll be with the first road roll and the second road roll turns to, rotating speed the is identical condition under, handle through further work hardening, stress is tended to balance, to reduce the distortion of losing efficacy.
The present invention realizes through following technical scheme the hot-rolled angle steel device for prestressing:
The hot-rolled angle steel device for prestressing comprises pressure rolling pair roller, high-voltage oil cylinder and transport, it is characterized in that: said pressure rolling pair roller has three groups at least; Every group of pressure rolling pair roller exerted pressure by the high-voltage oil cylinder adjustment of 20 tons of pressure, and transport traction angle steel is successively through said at least three group pressure rolling pair rollers.Recessed roller below every group of pressure rolling pair roller is a driving wheel, by motor, reductor driven in rotation.
Further said every group of pressure rolling pair roller comprises protruding roller and the recessed roller that cooperatively interacts, and recessed roller is hinged on the supporting body through recessed roll shaft, and protruding roller is installed on through protruding roll shaft in the chute of supporting body, and protruding roll shaft also is connected fixing with high-voltage oil cylinder through the body that is slidingly connected.
The further said shape that is slidingly connected is " ∩ " shape, and " ∩ " shape both sides are connected fixing with protruding roll shaft two ends, and " ∩ " shape both sides outer surface forms the null matched in clearance of minimum clearance with the supporting body wall respectively.
Above-mentioned to hot-rolled angle steel apply prestressing method divide three the step carry out; Be not less than under 20,000 kilograms of high-voltage oil cylinders drivings at pressure; Because angle steel both sides thickness is different; The protruding roller automatic centering of pressure rolling pair roller, so-called automatic centering are that the angle steel that the V font is placed has the automatic centering effect, and in the protruding roller fin align automatically in the recessed roller groove of mind-set center; Angle steel at first stresses pressure rolling is carried out on the big one side of angle steel thickness through first group of pressure rolling pair roller the time; Distortion appears in the angle steel both sides after first group of pressure rolling; Through second group of pressure rolling pair roller angle steel is carried out pressure rolling again, the distortion of second group of pressure rolling pair roller after to the pressure rolling of first group of pressure rolling pair roller revised; Last group pressure rolling pair roller is to the stable stress pressure rolling of trying one's best simultaneously of angle steel both sides, and the pressure rolling pair roller can have many groups to carry out repeatedly pressure rolling continuously; Minimum rolled thickness between above-mentioned every group of pressure rolling pair roller is provided with according to the angle steel material, on the basis of original thickness, slightly reduces usually.
Through after the above-mentioned at least three sub-high pressure pressure rollings, under high pressure pressure rolling effect, the metal angle material extends to material inside organization successively by the surface and changes, the surface sclerosis, and tensile strength increases.
Above-mentioned hot-rolled angle steel is applied prestressed method and device; Device comprises that at least three road pressure rolling pair rollers of being exerted pressure by hydraulic jack form; Two vertical planes considering angle steel are in the hot-roll forming process; Wall thickness can be different, and therefore, the pressure rolling pair roller uses the pressure rolling pair roller to carry out high pressure work hardening processing together with filleted corner respectively to two vertical planes of angle steel at first respectively; Wherein, last high pressure pressure rolling pair roller carries out pressure rolling jointly to two vertical planes of angle steel, and realizes repairing type simultaneously.
The invention has the beneficial effects as follows: through standard sections is implemented the prestressing force processed; Can the be multiplied tensile strength of material makes product reduce with the material amount, and mechanical performance improves; Especially before the load of flexural member is added up; Apply prestressing force to member and will produce one and the opposite distortion of distortion that produces with load action, load is wanted must want first this distortion opposite with load counteracting before member deforms along its action direction; Could continue to make member to deform along the load direction, angle steel tensile strength is greater than 800MPa after detecting apparatus of the present invention processing.
Description of drawings
Fig. 1 is a pressure rolling pair roller mounting structure sketch map of the present invention;
Fig. 2 is a pressure rolling pair roller relative status structural representation of the present invention;
Fig. 3 is the local enlarged diagram of pressure rolling pair roller of the present invention;
Fig. 4 is a pressure rolling pair roller pressure rolling process sketch map of the present invention.
Among the figure, the 1st, protruding roller, 1a are protruding roll shafts, the 2nd, recessed roller, 2a are recessed roll shafts, the 3rd, supporting body, 3a are chutes, the 4th, high-voltage oil cylinder, 4a are the bodies that is slidingly connected, the 5th, angle steel, 5a are the angle steel filleted corners, and F is the angle steel moving direction, and R is recessed roller direction of rotation.
The specific embodiment
Through embodiment the present invention is further described below; Present embodiment only is used for the present invention is further explained; But can not be interpreted as the restriction to protection domain of the present invention, those skilled in the art can make the scope that some nonessential improvement and adjustment belong to the present invention's protection according to the content of the invention described above.
Hot-rolled angle steel applies prestressing method, comprises that respectively successively high pressure pressure rolling work hardening being carried out on the angle steel both sides handles, more simultaneously to the pressure rolling of finalizing the design of angle steel both sides.
Said successively the angle steel both sides to be carried out that high pressure pressure rolling work hardening handles respectively be that at least one group of pressure rolling pair roller carries out high pressure pressure rolling work hardening on one side to angle steel and handle, and by at least one group of pressure rolling pair roller angle steel carried out high pressure pressure rolling work hardening again and handle.
Above-mentionedly successively high pressure pressure rolling work hardening is carried out on the angle steel both sides respectively and is handled, be since hot-rolled angle steel in the operation of rolling, the relative thickness of two vertical panels there are differences, the flatness and the thickness of each panel also there are differences.So the first road roll is to place, have under the effect of automatic centering centering function at angle steel vertical plane V font, with two surface ratios of angle steel than thickness and through flow harden centering thickness.
The second road roll be with the first road roll turns to, rotating speed the is identical condition under, rely on angle steel vertical plane V font to place, have under the effect of automatic centering centering function, two surfaces of angle steel are reached the flow harden index of basically identical.
Said is that at least one group of pressure rolling pair roller is simultaneously to the pressure rolling of finalizing the design of angle steel both sides to the pressure rolling of finalizing the design of angle steel both sides simultaneously.
The 3rd road roll be with the first road roll and the second road roll turns to, rotating speed the is identical condition under, handle through further work hardening, stress is tended to balance, to reduce the distortion of losing efficacy.
The hot-rolled angle steel device for prestressing comprises pressure rolling pair roller, high-voltage oil cylinder and transport, and the pressure rolling pair roller has three groups at least; Every group of pressure rolling pair roller exerted pressure by the high-voltage oil cylinder adjustment of 20 tons of pressure; Transport traction angle steel is successively through said at least three group pressure rolling pair rollers.Recessed roller below every group of pressure rolling pair roller is a driving wheel, by motor, reductor driven in rotation.
Every group of pressure rolling pair roller comprises protruding roller and the recessed roller that cooperatively interacts, and recessed roller is hinged on the supporting body through recessed roll shaft, and protruding roller is installed on through protruding roll shaft in the chute of supporting body, and protruding roll shaft also is connected fixing with high-voltage oil cylinder through the body that is slidingly connected.
The shape that is slidingly connected is " ∩ " shape, and " ∩ " shape both sides are connected fixing with protruding roll shaft two ends, and " ∩ " shape both sides outer surface forms the null matched in clearance of minimum clearance with the supporting body wall respectively.
In conjunction with Fig. 1 to Fig. 4.
As shown in Figure 1, pressure rolling pair roller mounting structure sketch map of the present invention.Supporting body 3 is a portal structures, and both sides are gripper shoe, at the gripper shoe middle part chute 3a is arranged; Recessed roller 2 is hinged on the gripper shoe of supporting body 3 through recessed roll shaft 2a; Protruding roller 1 is installed on through protruding roll shaft 1a among the chute 3a of supporting body 3 gripper shoes, and protruding roll shaft 1a two ends can move up and down in chute 3a, and protruding roll shaft 1a two ends also are connected with the body 4a that is slidingly connected and are fixed as one; The body 4a that is slidingly connected is shaped as " ∩ " shape; " ∩ " shape both sides are connected fixing with protruding roll shaft 1a two ends; Any mobile and body 4a that is slidingly connected that is protruding roller 1 and protruding roll shaft 1a is that one moves; " ∩ " shape both sides outer surface forms the null matched in clearance of minimum clearance with supporting body 3 gripper shoe inwalls respectively; Be the be slidingly connected motion tracks of body 4a of supporting body 3 gripper shoe inner wall limits, in fact limited the motion track of protruding roll shaft 1a and protruding roller 1, also realized the automatic centering of protruding roller 1 and recessed roller 2; This example body 4a that is slidingly connected has both sides and the connecting plate that is connected both sides, and the connecting plate upper surface is the plane, and the plane is connected with high-voltage oil cylinder 4, and the other end of high-voltage oil cylinder 4 is fixed on the crossbeam of supporting body 3; This example adopts the large-tonnage oil cylinder, and oil cylinder working-pressure is not less than 20,000 kilograms, can satisfy the requirement that realizes cure process.
As shown in Figures 2 and 3, Fig. 2 is a pressure rolling pair roller relative status structural representation of the present invention, and Fig. 3 is the local enlarged diagram of pressure rolling pair roller of the present invention.Protruding roller 1 carries out pressure rolling with recessed roller 2 cooperations to angle steel 5, and the minimum rolled thickness of protruding roller 1 and recessed roller 2 is provided with according to the angle steel material, is not more than the theoretical standard thickness of angle steel material usually; At first during first group of pressure rolling; Because hot-rolled angle steel both sides wall thickness can be different; Protruding roller 1 cooperates carrying out pressure rolling than webbing with recessed roller 2; Distortion appears in angle steel 5 both sides after first group of pressure rolling, carries out pressure rolling through second group of protruding roller 1 with 2 pairs of angle steel of recessed roller 5 again, and curing is revised in the distortion after second group of protruding roller 1 and 2 pairs of first group of pressure rollings of recessed roller; Last organizes the pressure rolling of finalizing the design simultaneously of protruding roller 1 and 2 pairs of angle steel both sides of recessed roller, and the pressure rolling pair roller can have many groups to carry out repeatedly pressure rolling continuously.
As shown in Figure 4, what Fig. 4 had represented that this example carries out is that three groups of protruding rollers 1 carry out pressure rolling with 2 pairs of angle steel of recessed roller 5, in fact can also increase protruding roller 1 of many groups and recessed roller 2 pressure rollings combination according to existing; The pressure rolling pair roller mounting structure of Fig. 1 is not all expressed among Fig. 4, only schematically shown the pressure rolling state and the moving direction thereof of protruding roller 1 and recessed roller 2 and angle steel 5.The rotation direction of three groups of protruding rollers 1 and recessed roller 2 is identical among the figure.
The tensile strength of angle steel is greater than 800MPa after the present invention processes, and the tensile strength of processing angle steel without the present invention is 375～460MPa.
Claims (6)
1. a hot-rolled angle steel applies prestressing method, it is characterized in that: use high knobbling rolls, successively high pressure pressure rolling work hardening is carried out on the angle steel both sides respectively and handled, again to the pressure rolling of finalizing the design of angle steel both sides.
2. hot-rolled angle steel according to claim 1 applies prestressing method; It is characterized in that:, by at least one group of pressure rolling pair roller angle steel is carried out high pressure pressure rolling work hardening again and handle on one side said successively the angle steel both sides to be carried out that high pressure pressure rolling work hardening handles respectively be that at least one group of pressure rolling pair roller carries out high pressure pressure rolling work hardening to angle steel and handle.
3. hot-rolled angle steel according to claim 1 applies prestressing method, it is characterized in that: said is that at least one group of pressure rolling pair roller is simultaneously to the pressure rolling of finalizing the design of angle steel both sides to the pressure rolling of finalizing the design of angle steel both sides simultaneously.
4. a hot-rolled angle steel device for prestressing comprises pressure rolling pair roller, high-voltage oil cylinder and transport, it is characterized in that: said pressure rolling pair roller has three groups at least; The high-voltage oil cylinder adjustment of 20 tons of pressure of every group of pressure rolling pair roller connection is exerted pressure; Transport traction angle steel is successively through said at least three group pressure rolling pair rollers.
5. hot-rolled angle steel device for prestressing according to claim 4; It is characterized in that: said every group of pressure rolling pair roller comprises protruding roller and the recessed roller that cooperatively interacts; Recessed roller is hinged on the supporting body through recessed roll shaft; Protruding roller is installed on through protruding roll shaft in the chute of supporting body, and protruding roll shaft also is connected fixing with high-voltage oil cylinder through the body that is slidingly connected.
6. hot-rolled angle steel device for prestressing according to claim 5; It is characterized in that: the said shape that is slidingly connected is " ∩ " shape; " ∩ " shape both sides are connected fixing with protruding roll shaft two ends, " ∩ " shape both sides outer surface forms the null matched in clearance of minimum clearance with the supporting body wall respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210325199.6A CN102825064B (en) | 2012-09-05 | 2012-09-05 | Method and device for applying prestressing force onto hot-rolled steel angle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210325199.6A CN102825064B (en) | 2012-09-05 | 2012-09-05 | Method and device for applying prestressing force onto hot-rolled steel angle |
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| Publication Number | Publication Date |
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| CN102825064A true CN102825064A (en) | 2012-12-19 |
| CN102825064B CN102825064B (en) | 2015-05-13 |
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| CN201210325199.6A Expired - Fee Related CN102825064B (en) | 2012-09-05 | 2012-09-05 | Method and device for applying prestressing force onto hot-rolled steel angle |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0615301A (en) * | 1992-06-30 | 1994-01-25 | Aichi Steel Works Ltd | Forming method for shape steel |
| JPH08281303A (en) * | 1995-04-07 | 1996-10-29 | Aichi Steel Works Ltd | Manufacture of angle steel |
| JP3157988B2 (en) * | 1994-07-05 | 2001-04-23 | モリ工業株式会社 | Angle material manufacturing method |
| CN1616189A (en) * | 2004-11-25 | 2005-05-18 | 胡可城 | Process for producing polished angle-steel for Mitsubishi lift |
| CN1301808C (en) * | 2004-06-17 | 2007-02-28 | 唐山钢铁股份有限公司 | Method for rolling angle steel |
| CN202725608U (en) * | 2012-09-05 | 2013-02-13 | 王力 | Device for applying pre-stresses on hot rolling angle steel |
-
2012
- 2012-09-05 CN CN201210325199.6A patent/CN102825064B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0615301A (en) * | 1992-06-30 | 1994-01-25 | Aichi Steel Works Ltd | Forming method for shape steel |
| JP3157988B2 (en) * | 1994-07-05 | 2001-04-23 | モリ工業株式会社 | Angle material manufacturing method |
| JPH08281303A (en) * | 1995-04-07 | 1996-10-29 | Aichi Steel Works Ltd | Manufacture of angle steel |
| CN1301808C (en) * | 2004-06-17 | 2007-02-28 | 唐山钢铁股份有限公司 | Method for rolling angle steel |
| CN1616189A (en) * | 2004-11-25 | 2005-05-18 | 胡可城 | Process for producing polished angle-steel for Mitsubishi lift |
| CN202725608U (en) * | 2012-09-05 | 2013-02-13 | 王力 | Device for applying pre-stresses on hot rolling angle steel |
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| CN102825064B (en) | 2015-05-13 |
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