CN104676235A - Support angle steel and production method thereof - Google Patents
Support angle steel and production method thereof Download PDFInfo
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- CN104676235A CN104676235A CN201410718412.9A CN201410718412A CN104676235A CN 104676235 A CN104676235 A CN 104676235A CN 201410718412 A CN201410718412 A CN 201410718412A CN 104676235 A CN104676235 A CN 104676235A
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Abstract
The invention belongs to the technical field of angle steel, relates to support angle steel and aims to solve the problem of the conventional basic bearing unit (such as flat steel and angle steel) fails to maintain good deformation quantity as well as improve bearing capability. The body comprises a bent face, a support face as a bearing face and an angle steel edge connecting the bent face and the support face. From one side of the angle steel edge to the other side of the angle steel edge, a first bent segment to the nth bent segments are sequentially arranged on the bent face, to be specific, the n is 2 or 3, a 90-segment angle is formed between every two adjacent bent segments, and a joint of every two adjacent bent segments is a bent arc edge thicker 0.95-0.98 times than the support angle steel. The bent arc edges are 3 mm-5 mm in arc length. According to the arrangement, the technical problem is solved.
Description
Technical field
The invention belongs to angle steel technical field, relate to a kind of support angle steel, manufacture support angle steel used and be Equal Angle Steel, Q345 steel or Q235 steel is adopted to make, thickness is generally 4mm-6mm, the present invention to support angle steel each several part width define all according to following regulation: Fig. 1 reflect be a kind of support angle steel bend after structural representation, supporting surface is represented between AB, the first bend section is represented between BC, the second bend section is represented between DE, the width of supporting surface refers to that the starting point A of supporting surface extends the position from A maximum distance that can reach to supporting surface along supporting surface direction, also be B point, distance between AB is exactly the width of supporting surface, the rest may be inferred for the width of other part strut angle steel structure.
Background technique
Bearing power is the important indicator of reflection bearing structure, improve the technological means that bearing power can adopt two aspects usually: on the one hand, technician can carry out the improvement of structure to the load-bearing elementary cell forming bearing structure, the bearing power of load-bearing elementary cell is improved; On the other hand, technician also can do to the topology layout of bearing structure the adjustment made new advances, and comprise the Placement, position etc. of each load-bearing elementary cell, the adjustment of this respect often significantly can promote the bearing power of bearing structure.
At present, the architecture advances of load-bearing elementary cell to be related to and few, a kind of common load-bearing elementary cell is exactly band steel, comparatively macrobending can be there is in band steel when stressed, and fracture can not be produced, but bearing power is more weak, by contrast, angle steel is a kind of selectable band steel alternative, although the bearing power increment of its unit deformation quantity is comparatively large, because ultimate deformation amount is minimum, once weight exceedes its limit bearing capacity, to rupture, not there is the possibility of repairing, thus weaken the bearing power of angle steel greatly.
Summary of the invention
Technical problem to be solved by this invention is existing load-bearing elementary cell, such as band steel described in background technique and angle steel, cannot under the prerequisite improving bearing power, keep good can deformation quantity.For this reason, the present invention considers angle steel to be carried out bending process, thus obtain such one support angle steel, described strut angle ladle is drawn together bending side, forms the supporting surface of weight-bearing surface and is connected the angle steel rib of bending side and supporting surface, described bending side is followed successively by the first bend section to the n-th bend section from angle steel rib side to opposite side, described n is 2 or 3, in 90 ° of angles between adjacent two bend sections, the joint of adjacent two bend sections is bending rib arc, the thickness of described bending rib arc is 0.95-0.98 times that supports angle steel thickness, and the arc length of bending rib arc is 3mm-5mm.
If make support angle steel of the present invention stressed, two kinds of deformation will be produced, the i.e. deformation of supporting surface and the deformation of bending side, and the deformation of bending side at least comprises the deformation of the first bend section and the deformation of the second bend section, compared to the deformation of band steel in stressed rear generation, no matter the deformation supporting angle steel body quantitatively or in the diversity of deformation mode all exceedes band steel.Be the situation of 2 for n, if apply pressure to support angle steel body, first bend section near the part of angle steel rib and the first bend section near the part of the second bend section by by the elongation of different proportion (i.e. first kind deformation), and the elongation (i.e. Equations of The Second Kind deformation) of overall equal proportion will occur along the part near the first bend section the second bend section, this just makes described support angle steel body have the bearing power larger than band steel.
Can in deformation quantity, the present invention has obvious technical advantage equally, can allow larger deformation occurs and the bearing power substantially not changing described support angle steel, and common angle steel ultimate deformation amount be very limited (under normal circumstances, two meters of long angle steel, do not produce the prerequisite of destructive structure change after pressurized under, the maximum horizontal tilt angle alpha at its two ends is generally below 3 °, see Fig. 2), once the gravity that angle steel bears exceedes the tolerance range of angle steel, the change of the destructive structure such as slight crack and even phenomenon of rupture can be produced, whole angle steel is caused to scrap immediately.In fact, be the situation of 2 for n, support angle steel of the present invention is when stressed generation deformation, first there is deformation in supporting surface, then drive the first bend section generation deformation by angle steel rib, drive the second bend section generation deformation by the bending rib arc of connection first bend section and the second bend section again by the deformation of the first bend section, the thickness of bending rib arc is set in 0.95-0.98 times that supports angle steel thickness by the present invention's suggestion, and the arc length of bending rib arc is arranged on 3mm-5mm.Arranging like this can guarantee that bending rib arc can resist larger deformation, such as carry out cutting independent to obtain bending rib arc by supporting angle steel along bending rib arc, and the bending rib arc of two meters long is bent, do not produce the prerequisite of destructive structure change in bending under, the horizontal tilt angle [alpha] at its two ends is between 3.2 ° ~ 6.1 °, thus can improve greatly support angle steel can the potentiality of deformation quantity, indirectly add the room for promotion supporting angle steel bearing power.
Preferred as one, the thickness of described bending rib arc is 0.98 times that supports angle steel thickness, and the arc length of bending rib arc is 3mm.Now, the horizontal tilt angle [alpha] at rib arc two ends is bent between 5.2 ° ~ 6.1 °.
Technician can to carry out to bending side by some common bending methods processed that system is curved (such as carries out punching press to bending side, by being equipped with rational press tool, guarantee to obtain bending rib arc of the presently claimed invention, but, because punching press completes instantaneously, the iron and steel internal structure at bending rib arc place has inevitably suffered destruction to a certain degree, in addition, punching press cannot ensure the thickness evenness bending rib arc, these 2 all to a great extent impact bending rib arc intensity and can deformation quantity, for this reason, present invention also offers a kind of manufacture method supporting angle steel, comprise:
The markers step of rib is bent between adjacent two bend sections;
Make curved step;
The curved step of described system comprise mark bending rib is heated heating steps, to carry out interim system along mark bending rib curved to form the step of bending rib arc and to bend the natural cooling step of rib arc; Described heating steps comprises the heating of bending rib, makes the temperature of bending rib be at least 850 DEG C, and the system of described stage is curved to be comprised with the step forming bending rib arc:
The first system curved stage: control the curved speed of system at 10 °/min-15 °/min;
The second system curved stage: control the curved speed of system at 30 °/min-35 °/min;
The 3rd system curved stage: control the curved speed of system at 35 °/min-40 °/min;
Described first system curved stage, the second system curved stage and the 3rd ratio making the bending angle processed in curved stage are 1: 1.8-2.1: 1.8-2.1.
The manufacture method of support angle steel of the present invention, further can reduce the arc length of bending rib arc, generally can control within 3.0mm-3.3mm, and the thickness bending rib arc can reach 0.96-0.98 times that supports angle steel thickness, thus the deformation quantity of bending rib arc can further promote, such as carry out cutting independent to obtain bending rib arc by supporting angle steel along bending rib arc, and the bending rib arc of two meters long is bent, do not produce the prerequisite of destructive structure change in bending under, the horizontal tilt angle [alpha] at its two ends is between 5.6 ° ~ 7.3 °.
In some embodiments of the invention, the system of described stage is curved comprises with the step forming bending rib arc:
The first system curved stage: control the curved speed of system at 11 °/min-13 °/min;
The second system curved stage: control the curved speed of system at 32 °/min-33 °/min;
The 3rd system curved stage: control the curved speed of system at 37 °/min-39 °/min;
Described first system curved stage, the second system curved stage and the 3rd ratio making the bending angle processed in curved stage are 1: 2: 2.
The bending rib arc obtained, its arc length is at 3.0mm-3.2mm, and the thickness bending rib arc can reach 0.97-0.98 times that supports angle steel thickness, if carry out cutting independent to obtain bending rib arc by supporting angle steel along bending rib arc, and the bending rib arc of two meters long is bent, do not produce the prerequisite of destructive structure change in bending under, the horizontal tilt angle [alpha] at its two ends is between 6.3 ° ~ 7.3 °.
In some embodiments of the invention, the temperature bending rib in described heating steps is 950 DEG C-970 DEG C.The bending rib arc obtained, its arc length is within 3.0mm-3.8mm, and the thickness bending rib arc can reach 0.97-0.98 times that supports angle steel thickness, if carry out cutting independent to obtain bending rib arc by supporting angle steel along bending rib arc, and the bending rib arc of two meters long is bent, under bending does not produce destructive structure change prerequisite, the horizontal tilt angle [alpha] at its two ends is between 6.1 ° ~ 7.3 °.
The present invention also wishes to improve the bearing power supporting angle steel.Before making the present invention, the increase material (such as the thickness of the raising bearing structure unit of appropriateness) of appropriateness can improve the bearing power of bearing structure unit, but this needs the fabricating cost increasing bearing structure unit.For support angle steel of the present invention, compared to angle steel, can obtaining and significantly promote by deformation quantity of described support angle steel, although support angle steel to be inferior to angle steel in the bearing power increment of unit deformation quantity, but due to have larger can deformation quantity, its bearing power all exceedes the angle steel of same model (supporting the angle steel of angle steel before not bending), and the gravity that unit length can bear is at least 1.3 times of same model angle steel usually.From this angle, the height that the utilization bending rib arc that the present invention wishes to try one's best shows can deformation quantity, the bearing power of support angle steel is maximized, in some embodiments of the invention, n is 2, the width ratio of the first bend section and the second bend section controls 1: 4.5 ~ 5.0, the support angle steel body of two meters long, do not produce the prerequisite of slight crack after pressurized under, the horizontal tilt angle [alpha] at its two ends is between 3.6 ° ~ 6.9 °, with of the same type but width than (consistency of thickness namely compared with the support angle steel body outside this scope, bending side is equal respectively with the width of supporting surface, separately, there is not contrasting of slight crack or fracture), under the prerequisite of tolerable injury level inclined angle alpha between 3.6 ° ~ 6.9 °, its bearing power has a considerable improvement, reach 58%-75%, such lifting amplitude is that technician dreamed of, not only can under the prerequisite not increasing material, significantly improve the bearing power supporting angle steel.
In other embodiments of the present invention, n is 3, first bend section, the width ratio of the second bend section and the 3rd bend section controls 2: 7: 1 ~ 2.5: 6: 1.5, the support angle steel body of two meters long, do not produce the prerequisite of slight crack after pressurized under, the horizontal tilt angle [alpha] at its two ends is between 3.3 ° ~ 6.6 °, with of the same type but width than (consistency of thickness namely compared with the support angle steel body outside this scope, bending side is equal respectively with the width of supporting surface), under the prerequisite of tolerable injury level inclined angle alpha between 3.3 ° ~ 6.6 °, its bearing power has a considerable improvement, reach 58%-75%.
In order to further illustrate, the present invention is defined following concept:
First contribution rate: the first deformation is to the contribution rate supporting the capability improving of angle steel body;
Second contribution rate: the second deformation is to the contribution rate supporting the capability improving of angle steel body.
Ratio between each bend section width, the impact of width on the first contribution rate and the second contribution rate is embodied from an angle, the thickness of bending side also can embody the impact of thickness on the first contribution rate and the second contribution rate from another angle, in fact, two kinds of angle impacts on the first contribution rate and the second contribution rate are different, the increase of thickness can increase by the first contribution rate fast, then relatively slow to the lifting of the second contribution rate.But the present invention also finds, at least also have another influent factor can have an impact to two kinds of contribution rates, such as, when n is 2, after bending side generation deformation, second bend section in fact also not exclusively produces Equations of The Second Kind deformation, to the deformation more close with the second bend section connecting edge with the first bend section be there is in the second bend section the closer to the part of the first bend section, this just makes the second bend section when bending side generation deformation, the deformation that the deformation that second bend section occurs near the first bend section part and the second bend section occur away from the first bend section part is also incomplete same, general, the deformation that the deformation that second bend section occurs near the first bend section part can occur away from the first bend section part than the second bend section is more violent, and the difference of this deformation can change uniformly along with the distance of deformation second bend section deformation position and the first bend section distance, thus also not exclusively there is Equations of The Second Kind deformation in the second bend section, certain deviation is there is in other words with Equations of The Second Kind deformation, consequently, reduce the second deformation to the contribution rate supporting angle steel body enabling capabilities, the degree weakened is represented by deformation damping coefficient, deformation damping coefficient increases along with the increase of the second bend section width, and reduce along with the increase of the second bend section thickness.
By analyzing above, the present invention is carrying out on the basis of width ratio restriction to each bend section, in order to further obtain more gratifying support angle steel body enabling capabilities, and reduce the quantity of material making and support angle steel body further, contemplated by the invention the impact on the first deformation and the second deformation of thickness and deformation damping coefficient, suggestion is when n is 2, and the width of described first bend section is 7mm-10mm, the width of the second bend section is 38mm-49mm, and the thickness of supporting surface is 4mm-5mm.
Have the support angle steel body of above-mentioned size, the support force of a meter long at least reaches 1.78 times of undressed same model band steel support force.Undressed same model band steel of the present invention refers to thickness and band steel that steel using amount with support angle steel body identical identical with support angle steel body thickness, as follows.
Preferred as one, the width of described first bend section is 8mm, and the width of the second bend section is 46mm, and the thickness of supporting surface is 5mm, the support force of one meter long reaches 2.26 times of undressed same model (i.e. consistency of thickness, the band steel that steel using amount is identical with supporting angle steel) band steel support force.Table 1 be the first bend section and the second bend section under different in width, relative to the contrast table of undressed same model band steel support force.
Table 1
Note: in table 1, the thickness of the first bend section and the second bend section is 4mm-5mm.
When n is 3, the width of described first bend section is 11mm-13mm, and the width of the second bend section is 38mm-45mm, and the width of the 3rd bend section is 6mm-8mm, and the thickness of supporting surface is 4mm-5mm.Have the support angle steel body of above-mentioned size, the support force of a meter long at least reaches 1.87 times of undressed same model band steel support force.
Preferred as one, the width of described first bend section is 11mm, and the width of the second bend section is 40mm, and the width of the 3rd bend section is 7mm, and the thickness of supporting surface is 5mm, and the support force of a meter long reaches 2.37 times of undressed same model band steel support force.Table 2 be the first bend section, the second bend section and the 3rd bend section under different in width, relative to the contrast table of undressed same model band steel support force.
Table 2
Note: in table 2, the thickness of the first bend section, the second bend section and the 3rd bend section is 4mm-5mm.
Obtain above-mentioned good technique effect to process accurately each bend section of support angle steel, before this, the present invention devises a kind of manufacture method supporting angle steel for this reason, comprising:
The markers step of rib is bent between adjacent two bend sections;
Make curved step;
The curved step of described system comprise mark bending rib is heated heating steps, to carry out interim system along mark bending rib curved to form the step of bending rib arc and to bend the natural cooling step of rib arc; Described heating steps comprises the heating of bending rib, makes the temperature of bending rib be at least 850 DEG C, and the system of described stage is curved to be comprised with the step forming bending rib arc:
The first system curved stage: control the curved speed of system at 10 °/min-15 °/min;
The second system curved stage: control the curved speed of system at 30 °/min-35 °/min;
The 3rd system curved stage: control the curved speed of system at 34 °/min-40 °/min;
Described first system curved stage, the second system curved stage and the 3rd ratio making the bending angle processed in curved stage are 1: 1.8-2.1: 1.8-2.1.
If but by common labeling method being used for the mark bending rib between described adjacent two bend sections, precision is not high, described common labeling method can be determine to bend between adjacent two bend sections the position of rib according to the width of each bend section, but is often making the width generation shortening in various degree of bend section in curved step.The markers step of bending rib of the present invention comprises will treat in adjacent two bend sections that the curved bend section width extending 0.3mm-0.6mm place of system is labeled as bending rib.The precision of each bend section of support angle steel obtained can be made like this to reach more than 98%.
Accompanying drawing explanation
Fig. 1 is the structural representation after supporting angle steel bending;
Fig. 2 is the structural representation after the stressed generation deformation of bending rib arc;
Fig. 3 is n support when being 2 angle steel structural representation (angle steel rib, bending rib are and mark, bending rib because of arc length too short, therefore do not see radian from Fig. 3);
Fig. 4 is n support when being 3 angle steel structural representation (angle steel rib, bending rib are and mark, bending rib because of arc length too short, therefore do not see radian from Fig. 4).
Embodiment
This embodiment remarks additionally to summary of the invention part, introduces a kind of manufacture method supporting angle steel, comprising:
The markers step of rib is bent between adjacent two bend sections;
Make curved step;
The curved step of described system comprise mark bending rib is heated heating steps, to carry out interim system along mark bending rib curved to form the step of bending rib arc and to bend the natural cooling step of rib arc; Described heating steps comprises the heating of bending rib, makes the temperature of bending rib be 950 DEG C-970 DEG C, and the system of described stage is curved to be comprised with the step forming bending rib arc:
The first system curved stage: control the curved speed of system at 10 °/min-15 °/min;
The second system curved stage: control the curved speed of system at 30 °/min-35 °/min;
The 3rd system curved stage: control the curved speed of system at 35 °/min-40 °/min;
Described first system curved stage, the second system curved stage and the 3rd ratio making the bending angle processed in curved stage are 1: 1.8-2.1: 1.8-2.1.Table 3 adopts the curved speed of different systems in the different systems curved stage, the curved effect table of the system obtained.
Table 3
Note: the thickness supporting angle steel in table 3 is 4mm-5mm, the bending rib arc length obtained is 3.0mm-3.3mm, and the thickness of bending rib arc reaches 0.96-0.97 times that supports angle steel thickness.
Embodiment 1-8
See Fig. 3, a kind of support angle steel, comprise bending side, form the supporting surface 1 of weight-bearing surface and connect the angle steel rib of bending side and supporting surface, described bending side is followed successively by the first bend section 2 and the second bend section 3 from angle steel rib side to opposite side, in 90 ° of angles between adjacent two bend sections, the joint of adjacent two bend sections is bending rib arc, and the thickness of described bending rib arc is 0.970 times that supports angle steel thickness, and the arc length of bending rib arc is 3.3mm.Embodiment 1-8 is the corresponding preparation method adopting 1-8 in table 3 respectively, and described first system curved stage, the second ratio making the bending angle processed in curved stage and the 3rd system curved stage are 1: 2: 2.Table 4 is the information slips supporting angle steel described in embodiment 1-8.
Table 4
Note: the multiple of the described support force that can bear compared to undressed same model band steel refers to and supports the multiple of angle steel in maximum support power and same model band steel maximum support power.
Embodiment 9-16
See Fig. 4, a kind of support angle steel, comprise bending side, form the supporting surface 11 of weight-bearing surface and connect the angle steel rib of bending side and supporting surface, described bending side is followed successively by the first bend section 12, second bend section 13 and the 3rd bend section 14 from angle steel rib side to opposite side, in 90 ° of angles between adjacent two bend sections, the joint of adjacent two bend sections is bending rib arc, and the thickness of described bending rib arc is 0.970 times that supports angle steel thickness, and the arc length of bending rib arc is 3.3mm.Embodiment 9-16 difference is the corresponding preparation method adopting 1-8 in table 3 in order, and described first system curved stage, the second system curved stage and the 3rd ratio making the bending angle processed in curved stage are 1: 2: 2.Table 5 is the information slips supporting angle steel described in embodiment 9-16.
Table 5
Note: the multiple of the described support force that can bear compared to undressed same model band steel refers to and supports the multiple of angle steel in maximum support power and same model band steel maximum support power.
More than show and describe basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (10)
1. one kind supports angle steel, it is characterized in that described strut angle ladle is drawn together bending side, forms the supporting surface of weight-bearing surface and connected the angle steel rib of bending side and supporting surface, described bending side is followed successively by the first bend section to the n-th bend section from angle steel rib side to opposite side, described n is 2 or 3, in 90 ° of angles between adjacent two bend sections, the joint of adjacent two bend sections is bending rib arc, and the thickness of described bending rib arc is 0.95-0.98 times that supports angle steel thickness, and the arc length of bending rib arc is 3mm-5mm.
2. one according to claim 1 supports angle steel, it is characterized in that the thickness of described bending rib arc is 0.98 times that supports angle steel thickness, and the arc length of bending rib arc is 3mm.
3. one according to claim 1 supports angle steel, it is characterized in that the width ratio of the first bend section and the second bend section controls 1: 4.5 ~ 5 when n is 2.
4. one according to claim 1 supports angle steel, and it is characterized in that when n is 3, the width ratio of the first bend section, the second bend section and the 3rd bend section controls 2: 7: 1 ~ 2.5: 6: 1.5.
5. one according to claim 3 supports angle steel, and it is characterized in that when n is 2, the width of described first bend section is 7mm-10mm, and the width of the second bend section is 38mm-49mm, and the thickness of supporting surface is 4mm-5mm.
6. according to claim 3 at one support angle steel, it is characterized in that when n is 3, the width of described first bend section is 11mm-13mm, and the width of the second bend section is 38mm-45mm, the width of the 3rd bend section is 6mm-8mm, and the thickness of supporting surface is 4mm-5mm.
7. support a manufacture method for angle steel, comprising:
The markers step of rib is bent between adjacent two bend sections;
Make curved step;
The curved step of described system comprise mark bending rib is heated heating steps, to carry out interim system along mark bending rib curved to form the step of bending rib arc and to bend the natural cooling step of rib arc; Described heating steps comprises the heating of bending rib, makes the temperature of bending rib be at least 850 DEG C, and the system of described stage is curved to be comprised with the step forming bending rib arc:
The first system curved stage: control the curved speed of system at 10 °/min-15 °/min;
The second system curved stage: control the curved speed of system at 30 °/min-35 °/min;
The 3rd system curved stage: control the curved speed of system at 35 °/min-40 °/min;
Described first system curved stage, the second system curved stage and the 3rd ratio making the bending angle processed in curved stage are 1: 1.8-2.1: 1.8-2.1.
8. a kind of manufacture method supporting angle steel according to claim 7, the temperature that it is characterized in that bending in described heating steps rib is 950 DEG C-970 DEG C.
9. a kind of manufacture method supporting angle steel according to claim 7, it is characterized in that the markers step of described bending rib comprises will treat in adjacent two bend sections that the curved bend section width extending 0.4mm-0.6mm place of system is labeled as bending rib.
10. a kind of manufacture method supporting angle steel according to claim 7, is characterized in that the system of described stage is curved and comprises with the step forming bending rib arc:
The first system curved stage: control the curved speed of system at 11 °/min-13 °/min;
The second system curved stage: control the curved speed of system at 32 °/min-33 °/min;
The 3rd system curved stage: control the curved speed of system at 37 °/min-39 °/min;
Described first system curved stage, the second system curved stage and the 3rd ratio making the bending angle processed in curved stage are 1: 2: 2.
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Cited By (1)
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| CN108723139A (en) * | 2018-04-13 | 2018-11-02 | 浙江盛达铁塔有限公司 | A kind of curved nozzle of angle steel system and angle steel bending method |
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