CN204221118U - Steel rolling hot-cutting saw blade - Google Patents
Steel rolling hot-cutting saw blade Download PDFInfo
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- CN204221118U CN204221118U CN201420459616.0U CN201420459616U CN204221118U CN 204221118 U CN204221118 U CN 204221118U CN 201420459616 U CN201420459616 U CN 201420459616U CN 204221118 U CN204221118 U CN 204221118U
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- saw blade
- sawtooth
- silencing groove
- cutting saw
- cutting
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Abstract
The utility model discloses a kind of steel rolling hot-cutting saw blade, overall in the form of annular discs, the sawtooth comprising the connecting hole outside the centre bore of disc centre, centre bore and be located on disk excircle; Excircle is radially provided with stop hole, and stop hole is connected as a single entity by the root of elongated slot and sawtooth, overall in elongated " U " type; Border in non-active area between stop hole and connecting hole is uniformly distributed and is provided with 4-8 group Silencing groove.It neither affects the strength and stiffness of saw bit matrix material, effectively can alleviate again the tension of bearing between saw blade excircle sawtooth, reduce the sensitiveness of sawtooth root crack output, reduce crackle and produce tendency, postpone the generation of saw blade crackle, extend saw blade single saw cutting life; Ensure continuity and the productivity ratio of Rolling Production, and reduce the quality problems such as section bar is cut tiltedly, burr exceeds standard.
Description
Technical field
The utility model relates to hot-cutting saw blade technical field, discloses a kind of steel rolling hot-cutting saw blade especially.
Background technology
Along with develop rapidly and the technological progress of China's steel and iron industry, in iron and steel enterprise, the application of continuous casting and continuous rolling integration Technology and equipment is more and more, the mill speed of the various product forms of enterprise is more and more faster, general mill speed has exceeded 40m/s, even if the section bar that diameter is larger, its mill speed is also more and more higher, therefore has higher requirement to the hot-cutting saw blade of section bar.
Generally, the material of steel rolling hot-cutting saw blade adopts 65Mn, and this material has higher hardness, and after saw blade heat treatment, hardness is HRC29-37; Quenching degree is good simultaneously, and sawtooth generally adopts high-frequency induction heating or contact electrical heating method to quench, and crown hardness reaches HRC56-63, adds wearability.In addition, there is decarburizing tendency few, cheap, the advantages such as excellent cutting performance, but it has heat sensitivity, easily produces hardening flaw, and have temper brittleness.And the maximum temperature of workpiece can, more than 1000 DEG C, simultaneously owing to cutting and friction effect, cause teeth portion temperature to raise rapidly when fervent, in order to prevent crown from annealing, must adopt powerful cooling, conventional is the cooling of water under high pressure brute force at present.Because its condition of work is severe, continuous print thermal shock being produced to cast-cutting saw slice teeth portion, easily producing fire check when cutting; And reduce the hardness of saw blade, saw bit matrix is occurred tired, cause its hardness, intensity to reduce, significantly reduce saw blade cutting life.Therefore, on hot continuous rolling cutting equipment, saw bit matrix material mostly is the alloy tool steels such as 50Cr4V, 50CrMoV, 50CrMnV, containing alloys such as more Cr, V, Mo, Mn in steel, the Main Function adding these alloying elements is crystal grain thinning, significantly improve the intensity of material, hardness and heat treatment performance, extend saw life.But; in use; because work on the spot environment is harsh; saw blade always high temperature and stand alternation thermal shock, stressed impact operating mode under work; add the reason of the aspect such as sawing device and saw blade, or often occur the quality problems such as section bar fracture is cut tiltedly, burr exceeds standard, saw blade single saw cutting life is lower; cause shutdown to change sheet frequent, have a strong impact on continuity and the productivity ratio of Rolling Production.In addition, saw blade in use also often occurs sticking with paste the phenomenon such as tooth, crackle, both affects production efficiency, and brings certain hidden danger also to the safety of production scene.
In light of this situation, research and development efficient and long life hot-cutting saw blade, improves the quality of cutting products and uses high speed and the continuity of hot continuous rolling production, significant.
As shown in Figure 1, the profile of tooth of current steel rolling mill section bar hot-cutting saw blade has mouse thread form (a), wolf's fang shape (b) and three kinds, isosceles triangle (c).Statistics shows, in existing saw, three kinds of profile of tooth saw blades all have application, almost respectively account for 1/3rd.Rational zigzag fashion should be able to meet following requirements: antialiased intensity is good, sawing less energy consumption, long service life, noise are low, manufacture and cost of refacing low.In order to serviceability and the exploitation novel tooth form of more above-mentioned three kinds of profiles of tooth, in recent years through theoretical research and the industrial experiment of system, draw to draw a conclusion:
(1) when tooth pitch t is identical with tooth depth h, best with the mouse thread form profile of tooth of rake angle=0 °, have good cutting ability, sawing energy consumption is low, and sawing force is little, long service life, is a kind of profile of tooth that should affirm;
(2) be secondly wolf's fang shape profile of tooth, but wolf's fang shape profile of tooth manufactures and fit is more difficult, is difficult to the profile of tooth designed by ensureing;
(3) dedendum strength of isosceles triangle profile of tooth is better, manufacture and fit more convenient, chip is seldom formed at crown place and considers knurl to be worth doing, non-directional during cutting; But sawing energy consumption is large, and noise is also maximum, crown intensity comparatively mouse tooth declines 40%, easy folded tooth, should take in when therefore this series products uses;
(4) the mouse tooth of novel arc back of the body tooth, two pointed tooth and band sideshake, have good mechanical property and serviceability, these Novel saw blades can transfer the prospect of product to.
The design and optimization that mainly concentrate on sawing profile of tooth are ground for hot-cutting saw blade, and saw blade circumferentially slot noise reduction, punching crack arrest research also fewer.Patent CN201020567Y discloses a kind of Low crack metal hot-cold circular saw blade entirety in a large and thin disk, the excircle of blade bodies is distributed with sawtooth, center is porose, connecting hole is had outside centre bore, there is hole for hoist in radius middle part, the excircle of blade bodies is arranged at intervals with 3-6 the flexible line of rabbet joint.It effectively can alleviate the tension of bearing between saw blade excircle sawtooth, reduces the sensitiveness of sawtooth root crack output, reduces crackle and produces tendency, postpone the generation of saw blade crackle, effectively can improve saw blade lifetime.
Utility model content
The purpose of this utility model is to provide a kind of steel rolling hot-cutting saw blade, its saw blade circumferentially slot noise reduction, punching crack arrest, set up irregularly-shaped hole to improve the overall distribution of force of matrix, delay matrix fatigue, thus extend saw blade single saw cutting life, ensure continuity and the productivity ratio of Rolling Production, and reduce the quality problems such as section bar is cut tiltedly, burr exceeds standard.
A kind of steel rolling hot-cutting saw blade that the utility model provides, overall in the form of annular discs, the sawtooth comprising the connecting hole outside the centre bore of disc centre, centre bore and be located on disk excircle; Excircle is radially provided with stop hole, and stop hole is connected as a single entity by the root of elongated slot and sawtooth, overall in elongated " U " type; Border in non-active area between stop hole and connecting hole is uniformly distributed and is provided with 4-8 group Silencing groove.Silencing groove and stop hole neither affect the strength and stiffness of saw bit matrix material; Effectively can alleviate again the tension of bearing between saw blade excircle sawtooth, reduce the sensitiveness of sawtooth root crack output, reduce crackle and produce tendency, postpone the generation of saw blade crackle, extend saw blade single saw cutting life.
Preferably, the shape of the cutting edge of described sawtooth helically line, helical angle is 10 ° ~ 15 °.When cutting edge and installation shaft line parallel, when sawing, sawtooth enters simultaneously and exits cutting lay simultaneously, and impulse ratio is comparatively large, easily causes tipping.When cutting edge and saw blade install axis inclination certain angle, cutting edge is stressed to make moderate progress.The cutting edge of sawtooth is ground to the shape of helix, intensity and the stress of cutting edge can be improved further; In working angles, add effective cutting width of chip layer, the incision of each sawtooth and exit relatively more steady, decrease shock and vibration, extend saw life.
Preferably, often organize Silencing groove and comprise 2-5 bar Silencing groove, every bar Silencing groove is deep-slotted chip breaker, the width of deep-slotted chip breaker is 3-6mm, arc length is 15-25 times of width, and it is deep-slotted chip breaker width 1.5-2.5 through hole doubly that arc length direction is evenly equipped with several diameter, and the two ends of deep-slotted chip breaker are equipped with through hole.The design of this kind of Silencing groove can improve the overall distribution of force of matrix, delay matrix fatigue, prevent matrix from occurring distortion too early, thus extend saw blade single saw cutting life, ensure continuity and the productivity ratio of Rolling Production, and reduce the quality problems such as section bar is cut tiltedly, burr exceeds standard.
Preferably, the circular arc trend of every bar Silencing groove is certain angle with the circumferencial direction of hot-cutting saw blade, and this angle is identical with the helical angle of sawtooth.
Preferably, often organize the center of circle of many Silencing groove initiating terminal through holes in Silencing groove on same straight line, at a certain angle with the linear be made up of the center of circle at saw blade center and an outermost Silencing groove initiating terminal through hole, this angle is identical with the helical angle of sawtooth.The design of this Silencing groove, no matter the main story of hot-cutting saw blade or reverse, all for best stress, decreases the distortion of saw blade.
Preferably, in order to ensure the strength and stiffness of saw blade, the distance often organized between the initiating terminal through hole center of circle of an outermost Silencing groove of Silencing groove and the cylindrical of hot-cutting saw blade is not less than 150mm, and the radial distance between every bar Silencing groove is not less than 120mm.
Preferably, the width of elongated slot is 2-6mm, and the length of elongated slot is sawtooth tooth depth 3-6 times, and the diameter of stop hole is 1-2.5 times of the width of elongated slot.Preferred further, the width of elongated slot is 3-5mm, and the length of elongated slot is sawtooth tooth depth 4-5 times, and the diameter of stop hole is 1.5-2 times of the width of elongated slot.
Preferably, the matrix material of described steel rolling hot-cutting saw blade is 50Cr4MoVNb steel.On the basis of traditional hot-cutting saw blade 50Cr4V steel, in order to refinement matrix material crystal grain, improve matrix strength and rigidity, select the 50Cr4MoVNb steel containing Mo, Nb.
The beneficial effects of the utility model have:
The excircle of 1, hot-cutting saw blade is radially provided with stop hole, Silencing groove is provided with in non-active area between stop hole and connecting hole, neither affect the strength and stiffness of saw bit matrix material, effectively can alleviate again the tension of bearing between saw blade excircle sawtooth, reduce the sensitiveness of sawtooth root crack output, reduce crackle and produce tendency, postpone the generation of saw blade crackle, extend saw blade single saw cutting life;
2, Silencing groove adopts the design of the strip deep-slotted chip breaker of uniform through hole, to improve the overall distribution of force of matrix, delay matrix fatigue, prevent matrix from occurring distortion too early, thus extend saw blade single saw cutting life, ensure continuity and the productivity ratio of Rolling Production, and reduce the quality problems such as section bar is cut tiltedly, burr exceeds standard;
3, the shape of the cutting edge of sawtooth helically line, and Silencing groove design in relevant angle identical with helical angle, intensity and the stress of cutting edge can be improved, effective cutting width of chip layer is added in working angles, the incision of each sawtooth and exit more steady, decrease shock and vibration, extend saw life.
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art hot-cutting saw blade profile of tooth.
Fig. 2 is the structural representation of steel rolling hot-cutting saw blade of the present invention.
Fig. 3 is the I place partial enlarged drawing of steel rolling hot-cutting saw blade of the present invention.
Fig. 4 is the A place sectional view of steel rolling hot-cutting saw blade of the present invention.
Fig. 5 is the II place partial enlarged drawing of steel rolling hot-cutting saw blade of the present invention.
In figure, 1-centre bore, 2-connecting hole, 3-sawtooth, 4-elongated slot, 5-stop hole, 6-Silencing groove.
Detailed description of the invention
The present embodiment is the utility model preferred embodiment, and other its principles all are identical with the present embodiment or approximate with basic structure, all within the utility model protection domain.
Incorporated by reference to referring to accompanying drawing 2 to 5, the steel rolling hot-cutting saw blade of the present embodiment, overall in the form of annular discs, the sawtooth 3 comprising the connecting hole 2 outside the centre bore 1 of disc centre, centre bore 1 and be located on disk excircle; Excircle is radially uniformly distributed and is provided with four groups of stop holes 5, stop hole 5 is connected as a single entity by the root of elongated slot 4 with sawtooth 3, overall in elongated " U " type; Border in non-active area between stop hole 5 and connecting hole 2 is uniformly distributed and is provided with four groups of Silencing groove 6.The saw blade of the Φ 2000mm commonly used for production scene, the width of elongated slot 4 is 5mm, and the length of elongated slot is 60mm, and the diameter of stop hole 5 is Φ 10mm.Certainly, the width of elongated slot 4 can be selected between 2-6mm, and the length of elongated slot 4 is sawtooth 3 tooth depth 3-6 times, and the diameter of stop hole 5 is 1-2.5 times of the width of Silencing groove 4.After the sawtooth 3 of hot-cutting saw blade excircle processes, circumferentially radially opening elongated slot 4 and stop hole 5, neither affect the strength and stiffness of saw bit matrix material; Effectively can alleviate again the tension of bearing between saw blade excircle sawtooth 3, reduce the sensitiveness of sawtooth 3 root crack output, reduce crackle and produce tendency, postpone the generation of saw blade crackle, extend saw blade single saw cutting life.
As can be seen from Figure 1, in all zigzag saw blades, cutting edge and the axis of saw blade installation shaft are parallel or angled.When cutting edge and installation shaft line parallel, when sawing, sawtooth enters simultaneously and exits cutting lay simultaneously, and impulse ratio is comparatively large, easily causes tipping.When cutting edge and saw blade install axis inclination certain angle, cutting edge is stressed to make moderate progress.In order to improve intensity and the stress of cutting edge further, in the present embodiment, the shape of the cutting edge of sawtooth 3 helically line; Its helical angle is 15 °, adds effective cutting width of chip layer in working angles, the incision of each sawtooth and exit relatively more steady, decreases shock and vibration, extends saw life.Certainly, helical angle can be selected arbitrarily within the scope of 10 ° ~ 15 °.
In the present embodiment, the border in the non-active area between stop hole 5 and connecting hole 2 is uniformly distributed and is provided with four groups of Silencing groove 6, often group comprises three Silencing groove 6.The saw blade of the Φ 2000mm commonly used for production scene, within the position of Silencing groove 6 is positioned at diameter of phi 1800mm, the annular region not affecting the assembling of saw blade connecting hole bolt is again interior (such as: diameter is the saw blade of 2000mm, after diameter may wear to 1800mm, just do not re-use, do and scrap process).Every bar Silencing groove 6 is deep-slotted chip breaker, and the width of deep-slotted chip breaker is 5mm, and arc length is the 400mm of width, and it is the through hole of 10mm that arc length direction is evenly equipped with four diameters, and the two ends of deep-slotted chip breaker are equipped with through hole, and processes the through hole of a Φ 10 every 100mm.The trend of Silencing groove 6 is not parallel with the circumferencial direction of saw blade, but and in certain angle between the circumference of saw blade, the helical angle of this angle and saw blade sawtooth 3 is circumferentially identical, and such as angle is 15 °; In addition, the straight line that the axis of the initiating terminal through hole of saw blade center and an outermost Silencing groove 6 is formed, also form straight line with the axis of three Silencing groove initiating terminal through holes, the angle between these two straight lines is also 15 °.This layout, no matter saw blade main story or reverse, all for best stress, decreases the distortion of saw blade.In order to ensure the strength and stiffness of saw blade, the distance often organized between the hole of the initiating terminal of an outermost Silencing groove and the cylindrical of Φ 1800mm circle is not less than 150mm, and the radial distance between three Silencing groove is not less than 120mm.Adopt the mode of laser cutting, process four groups of Silencing groove 6, to improve the overall distribution of force of matrix, delay matrix fatigue, prevent matrix from occurring distortion too early, thus extend hot-cutting saw blade single saw cutting life, ensure continuity and the productivity ratio of Rolling Production, and reduce the quality problems such as section bar is cut tiltedly, burr exceeds standard.By finite element analysis software, systematically analyze the situation such as stress, stress concentration distribution of hot-cutting saw blade body portion, so that carry out structure improvement targetedly.As the distortion of the present embodiment, the group number of Silencing groove can be selected in 4-8 group, all need circumferentially be evenly distributed.
In the present embodiment, the matrix material of saw blade is 50Cr4MoVNb steel.On the basis of traditional hot-cutting saw blade 50Cr4V steel, in order to refinement matrix material crystal grain, improve matrix strength and rigidity, select the 50Cr4MoVNb steel containing Mo, Nb.
Above disclosedly be only preferred embodiment of the present utility model, certainly can not limit the interest field of the utility model with this, therefore according to the equivalent variations that the utility model claim is done, still belong to the scope that the utility model is contained.
Claims (7)
1. a steel rolling hot-cutting saw blade, overall in the form of annular discs, the sawtooth comprising the connecting hole outside the centre bore of disc centre, centre bore and be located on disk excircle, excircle is radially provided with stop hole, stop hole is connected as a single entity by the root of elongated slot and sawtooth, overall in elongated " U " type; Border in non-active area between stop hole and connecting hole is uniformly distributed and is provided with 4-8 group Silencing groove; It is characterized in that: often organize Silencing groove and comprise 2-5 bar Silencing groove, every bar Silencing groove is deep-slotted chip breaker, the width of deep-slotted chip breaker is 3-6mm, arc length is 15-25 times of width, it is deep-slotted chip breaker width 1.5-2.5 through hole doubly that arc length direction is evenly equipped with several diameter, and the two ends of deep-slotted chip breaker are equipped with through hole.
2. steel rolling hot-cutting saw blade according to claim 1, is characterized in that: the shape of the cutting edge of described sawtooth helically line, helical angle is 10 ° ~ 15 °.
3. steel rolling hot-cutting saw blade according to claim 1, is characterized in that: the width of elongated slot is 2-6mm, and the length of elongated slot is sawtooth tooth depth 3-6 times, and the diameter of stop hole is 1-2.5 times of the width of elongated slot.
4. steel rolling hot-cutting saw blade according to claim 1 and 2, is characterized in that: the circular arc trend of every bar Silencing groove is certain angle with the circumferencial direction of hot-cutting saw blade, and this angle is identical with the helical angle of sawtooth.
5. steel rolling hot-cutting saw blade according to claim 4, it is characterized in that: often organize the center of circle of many Silencing groove initiating terminal through holes in Silencing groove on same straight line, at a certain angle with the linear be made up of the center of circle at saw blade center and an outermost Silencing groove initiating terminal through hole, this angle is identical with the helical angle of sawtooth.
6. steel rolling hot-cutting saw blade according to claim 4, it is characterized in that: the distance often organized between the initiating terminal through hole center of circle of an outermost Silencing groove of Silencing groove and the cylindrical of hot-cutting saw blade is not less than 150mm, and the radial distance between every bar Silencing groove is not less than 120mm.
7. the steel rolling hot-cutting saw blade according to claim 5 or 6, is characterized in that: the matrix material of described steel rolling hot-cutting saw blade is 50Cr4MoVNb steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420459616.0U CN204221118U (en) | 2014-08-15 | 2014-08-15 | Steel rolling hot-cutting saw blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420459616.0U CN204221118U (en) | 2014-08-15 | 2014-08-15 | Steel rolling hot-cutting saw blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204221118U true CN204221118U (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420459616.0U Expired - Fee Related CN204221118U (en) | 2014-08-15 | 2014-08-15 | Steel rolling hot-cutting saw blade |
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| Country | Link |
|---|---|
| CN (1) | CN204221118U (en) |
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2014
- 2014-08-15 CN CN201420459616.0U patent/CN204221118U/en not_active Expired - Fee Related
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Addressee: Wang Liangong Document name: Notification to Pay the Fees |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20150815 |
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| EXPY | Termination of patent right or utility model |