CN111396103B - Continuous rib anchor rod steel and preparation method thereof - Google Patents
Continuous rib anchor rod steel and preparation method thereof Download PDFInfo
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- CN111396103B CN111396103B CN202010145604.0A CN202010145604A CN111396103B CN 111396103 B CN111396103 B CN 111396103B CN 202010145604 A CN202010145604 A CN 202010145604A CN 111396103 B CN111396103 B CN 111396103B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 70
- 239000010959 steel Substances 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 238000003801 milling Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 14
- 125000003003 spiro group Chemical group 0.000 abstract description 4
- 238000004873 anchoring Methods 0.000 description 20
- 239000011435 rock Substances 0.000 description 7
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000005482 strain hardening Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Geochemistry & Mineralogy (AREA)
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- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a continuous rib anchor rod steel and a preparation method thereof, belonging to the technical field of steel rolling, and the continuous rib anchor rod steel comprises a rod body: a first transverse rib segment; a first flat section located at an end of the first transverse rib section; a second cross rib section located at an end of the first flat section; the outer surfaces of the first transverse rib section and the second transverse rib section are both provided with threads, the first transverse rib section and the second transverse rib section are provided with a first hole type structure, and the first flat straight section is provided with a second hole type structure; a backing plate disposed at an end of the second transverse rib segment; the nut, the setting is in the backing plate is kept away from one side of the horizontal rib section of second, just the nut with the body of rod spiro union has reached the production that reduces the microcrack behind the thread rolling to improve the radial atress ability of stock, improve the technological effect of anchor effect.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to continuous rib anchor rod steel and a preparation method thereof.
Background
The anchor bolt support is a roadway support method which is developed rapidly in recent years, and the mechanical state of surrounding rock is improved through the anchor bolt anchored into the surrounding rock, so that a support body and the surrounding rock form a unified structural body capable of bearing load, the strength of the rock body is improved, the deformation development of the surrounding rock is prevented or delayed, and the integrity of the surrounding rock and the shape of the section of the roadway are effectively maintained.
The anchor bolt support is a safe and economic support mode, is a general name of a support structure taking an anchor bolt as a main body, and comprises support modes of anchor bolts, anchor spraying nets and the like. The technology is that holes are obliquely formed in a soil layer, cement (or cement mortar) is poured after anchor rods are embedded, and the load acting on a supporting structure is borne under the combined action of the bond strength of a pull rod and an anchoring body and the strength of the pull rod by depending on the friction force between the anchoring body and the soil. The anchor bolt support has the characteristics of simple structure, convenient construction, low cost, strong adaptability to engineering and the like, and is widely applied to civil engineering (including mining engineering). The anchor rod is anchored in the stratum, the structure and the stratum are tightly interlocked together through the anchor rod, and the tension of the structure is transmitted by depending on the shear strength of the anchor rod and the surrounding stratum, so that the stratum is reinforced, and the aim of keeping the structure and the rock mass stable is fulfilled.
When in use, the common hot-rolled anchor rod steel is firstly cut into a certain length, one end of the anchor rod steel is cut to be sharp, the other end of the anchor rod steel is contracted and then rolled with a screw (the length is about 50-150 mm), and a nut is sleeved conveniently when in use. However, the conventional hot-rolled anchor steel has the following problems: (1) because the transverse ribs are densely distributed on the surface of the anchor rod steel, the transverse ribs have more protrusions, are compressed unevenly when being reduced in diameter, deform greatly to generate work hardening, and are easy to generate micro cracks after thread rolling, thereby influencing the service life and being easy to generate fracture particularly when bearing radial bending deformation; (2) because the upper ribs and the lower ribs are not completely connected in the circumferential distribution of the transverse ribs of the anchor rod steel, and a gap exists between the tail ends of the transverse ribs, the anchoring force of the anchor rod steel in the circumferential direction is not uniform in the using process, and particularly the anchoring force at the gap between the tail ends of the transverse ribs is poor.
Disclosure of Invention
The invention provides continuous rib anchor rod steel and a preparation method thereof, which are used for solving the technical problems that transverse ribs are densely distributed on the surface of the anchor rod steel in the prior art, the deformation is large, the work hardening is generated, microcracks are easy to appear, the service life is influenced, and the anchoring force at the gap position of the tail end of each transverse rib is poor, so that the generation of microcracks after thread rolling is reduced, the radial stress capability of an anchor rod is improved, and the anchoring effect is improved.
In a first aspect, the present invention provides a continuous rib anchor rod steel comprising: the body of rod, the body of rod includes: a first transverse rib segment; a first flat section located at an end of the first transverse rib section; a second cross rib section located at an end of the first flat section; the outer surfaces of the first transverse rib section and the second transverse rib section are both provided with threads, the first transverse rib section and the second transverse rib section are provided with a first hole type structure, and the first flat straight section is provided with a second hole type structure; a backing plate disposed at an end of the second transverse rib segment; the nut is arranged on one side, far away from the second transverse rib section, of the base plate and is in threaded connection with the rod body.
Preferably, the thread is a left-hand thread, or a right-hand thread.
Preferably, the thread is a continuous contour thread.
Preferably, the first hole-type structure includes: the first outer circle is concentrically arranged outside the first inner circle; a first notch plane, an end of the first outer circle extending to the first notch plane.
Preferably, the second hole-type structure includes: the second outer circle is arranged at two ends of the second inner circle and is tangent to the second inner circle; a second notch plane, an end of the second outer circle extending to the second notch plane, and a radius of the second inner circle being the same as a radius of the first inner circle.
Preferably, the height ranges of the first notch plane and the second notch plane are 0-0.01 mm.
Preferably, the width of the notch of the second hole-type structure is larger than the width of the notch of the first hole-type structure.
In a second aspect, the invention provides a method for preparing continuous rib anchor rod steel, which comprises the following steps: turning a roller, namely turning a rolled piece into a first pass structure according to a first preset requirement by using a lathe; milling threads on the rolled piece according to a preset requirement by using a milling machine; and turning a second hole type structure according to a second preset requirement, assembling a finished product rolling mill by using a roller of the second hole type structure, assembling the finished product rolling mill on a steel rolling production line, producing the anchor rod steel, and performing radial fine adjustment on the upper roller by adopting a radial fine adjustment coupler to enable the upper roller to rotate for a preset angle along the axis of the roller to obtain the anchor rod steel with continuous threads.
Preferably, the roller is a tungsten carbide roller ring combined roller.
Preferably, the finishing mill is a short-stress mill, and the bounce range of the finishing mill is less than or equal to 0.2 mm.
One or more technical solutions in the embodiments of the present invention at least have one or more of the following technical effects:
the embodiment of the invention provides continuous rib anchor rod steel and a preparation method thereof, and the continuous rib anchor rod steel comprises a rod body, wherein the rod body comprises: the bolt comprises a first transverse rib section, a first flat section and a second transverse rib section, wherein the first flat section is located at the tail end of the first transverse rib section, the second transverse rib section is located at the tail end of the first flat section, and threads are formed on the outer surfaces of the first transverse rib section and the second transverse rib section, so that transverse ribs on a bolt body of continuous rib anchor rod steel are formed. The first transverse rib section and the second transverse rib section are provided with a first hole type structure, and the first flat straight section is provided with a second hole type structure; backing plate and nut, the backing plate setting is at the end of the horizontal rib section of second, and the nut is installed and is kept away from the one side of the horizontal rib section of second in the backing plate, and nut and the body of rod spiro union. Therefore, the continuous equal-height thread ribs can increase the anchoring force and reduce the generation of microcracks after thread rolling, thereby improving the radial stress capacity of the anchor rod and improving the anchoring effect. Through application design, the anchor rod steel with smaller diameter can achieve the same anchoring force, so that the aim of saving metal can be fulfilled; through "there is cross rib department" and "no cross rib department" base circle adoption different pass design, can guarantee under the circumstances that the cross rib is full of, the stock steel does not have cross rib department and does not produce ear defect (the stock steel can not take the ear), thereby the stock steel surface is densely covered the cross rib among the prior art has been solved, the great production work hardening that warp, the crazing line easily appears, influence life, the relatively poor technical problem of cross rib end clearance department anchoring force, the production of crazing line after having reached the reduction thread rolling, thereby improve the radial atress ability of stock, improve the technological effect of anchoring effect.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Fig. 1 is a schematic structural view of a continuous rib anchor rod steel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional shape of FIG. 1;
FIG. 3 is another schematic structural view of a continuous rib anchor rod steel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional shape of FIG. 3;
FIG. 5 is a schematic view of the first hole pattern of FIG. 1;
FIG. 6 is a schematic view of the second hole pattern of FIG. 1;
FIG. 7 is a schematic view of a milling cutter template for continuous rib anchor rod steel according to an embodiment of the present invention;
fig. 8 is a schematic flow chart of a method for manufacturing a continuous rib anchor rod steel according to an embodiment of the invention.
Description of reference numerals: the bolt comprises a bolt body 1, a first transverse rib section 11, a first straight section 12, a second transverse rib section 13, a first inner circle 21, a first outer circle 22, a first notch plane 23, a second inner circle 31, a second outer circle 32, a second notch plane 33 and threads 4.
Detailed Description
The embodiment of the invention provides continuous rib anchor rod steel and a preparation method thereof, which are used for solving the technical problems that transverse ribs are densely distributed on the surface of the anchor rod steel in the prior art, the deformation is large, the work hardening is generated, microcracks are easy to appear, the service life is influenced, and the anchoring force at the gap at the tail end of each transverse rib is poor.
The technical scheme in the embodiment of the invention has the following general idea:
the embodiment of the invention provides continuous rib anchor rod steel and a preparation method thereof, and the continuous rib anchor rod steel comprises a rod body, wherein the rod body comprises: a first transverse rib segment; a first flat section located at an end of the first transverse rib section; a second cross rib section located at an end of the first flat section; the outer surfaces of the first transverse rib section and the second transverse rib section are both provided with threads, the first transverse rib section and the second transverse rib section are provided with a first hole type structure, and the first flat straight section is provided with a second hole type structure; a backing plate disposed at an end of the second transverse rib segment; the nut, the setting is in the backing plate is kept away from one side of the horizontal rib section of second, just the nut with the body of rod spiro union has reached the production that reduces the microcrack behind the thread rolling to improve the radial atress ability of stock, improve the technological effect of anchor effect.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 is a schematic structural view of a continuous rib anchor rod steel according to an embodiment of the present invention, and as shown in fig. 1, the continuous rib anchor rod steel includes:
body of rod 1, body of rod 1 includes: a first transverse rib section 11; a first flat section 12, said first flat section 12 being located at the end of said first transverse rib section 11; a second transverse rib section 13, the second transverse rib section 13 being located at an end of the first flat section 12; wherein, the outer surfaces of the first transverse rib section 11 and the second transverse rib section 13 are both provided with threads 4.
Further, the thread 4 is a left-hand thread or a right-hand thread.
Further, the thread 4 is a continuous contour thread.
Specifically, as shown in fig. 3 and 4, the rod body 1 is the main external structure of the continuous rib anchor rod steel, and the shape of the rod body is an elongated cylindrical structure. The body of rod 1 includes: the rod body comprises a first transverse rib section 11, a first flat section 12 and a second transverse rib section 13, specifically, the first transverse rib section 11, the first flat section 12 and the second transverse rib section 13 are sequentially arranged on the rod body 1, the first flat section 12 is positioned between the first transverse rib section 11 and the second transverse rib section 13, namely, the first flat section 12 is positioned at the tail end of the first transverse rib section 11, and the second transverse rib section 13 is positioned at the tail end of the first flat section 12. Meanwhile, as shown in fig. 2, a continuous equal-height thread 4 is formed on the outer surface of each of the first and second transverse rib sections 11 and 13, thereby forming a transverse rib on the body 1 of the continuous rib anchor steel. Further, the thread 4 on the first transverse rib section 11 and the second transverse rib section 13 can be designed according to actual needs, for example, it can be selectively machined into a right-handed thread or a left-handed thread, and this embodiment is not limited in particular.
Further, the continuous rib anchor rod steel further comprises: a shim plate disposed at the end of the second transverse rib section 13; and the nut is arranged on one side, far away from the second transverse rib section 13, of the backing plate and is in threaded connection with the rod body 1.
Specifically, the backing plate is installed at the end of the rod body 1, that is, the end of the second transverse rib section 13, and then a threaded hole is processed on the second transverse rib section 13, and then the nut can be connected with the second transverse rib section 13 through threads, so that the nut is connected with the rod body 1.
Further, the first transverse rib section 11 and the second transverse rib section 13 have a first hole-type structure, and the first flat section 12 has a second hole-type structure.
Further, the first hole type structure includes: a first inner circle 21 and a first outer circle 22, the first outer circle 22 being concentrically arranged outside the first inner circle 21; a first notch plane 23, one end of the first outer circle 22 extending to the first notch plane 23.
Specifically, to ensure that the continuous thread rib is filled at the hole type roll gap, the hole type roll gap must be as small as possible, ideally zero during hot rolling. However, in the actual production process, due to the existence of the bouncing of the rolling mill, even if a certain prestress is applied to the roller, the roller gap of about 0.1-0.3 mm exists. In order to ensure the dimensional accuracy of finished rolled pieces, when the finished hole patterns are designed, the hole pattern structure of the first transverse rib section 11 and the hole pattern structure of the second transverse rib section 13 are the same, but the hole pattern structure of the first transverse rib section 11 and the hole pattern structure of the second transverse rib section 13 are different from the hole pattern structure of the first straight section 12. Namely, the first transverse rib section 11 and the second transverse rib section 13 have a first hole-type structure, and the first flat section 12 has a second hole-type structure.
Further, the first hole type structure includes: a first inner circle 21, a first outer circle 22 and a first notch plane 23, the first outer circle 22 being concentrically disposed outside the first inner circle 21; one end of the first outer circle 22 extends to the first notch plane 23.
Specifically, as shown in fig. 5, which is a hole pattern diagram with transverse ribs, the first inner circle 21 is a base circle part of the first hole pattern structure, and the first outer circle 22 is disposed outside the first inner circle 21 and has the same center. And further extends outwardly from the first notch plane 23 at both ends of the first outer circle 22. Wherein the radius of the first outer circle 22 is R1The radius of the first inner circle 21 is R, and it is clear that the radius of the first outer circle 22 is larger than the radius of the first inner circle. The height of the first notch plane 23, i.e., the roll gap height, is S, and the range of S is preferably 0 to 0.01mm in the present embodiment. Further, as shown in fig. 7, the thread height of the thread 4 formed on the first transverse rib section 11 and the second transverse rib section 13 is h, so that the radius of the first outer circle 22 is R1R + h. When the diameter of the rod body 1 is D, R ═ D/2+0.1 mm.
Further, the second hole type structure includes: a second inner circle 31 and a second outer circle 32, wherein the second outer circle 32 is arranged at two ends of the second inner circle 31, and the second outer circle 32 is tangent to the second inner circle 31; a second notch plane 33, an end of the second outer circle 32 extending to the second notch plane 33, and the radius of the second inner circle 31 being the same as the radius of the first inner circle 21.
Further, the height ranges of the first notch plane 32 and the second notch plane 33 are 0-0.01 mm.
Specifically, the second hole-type portion is the hole-type structure of the rod body 1 without the transverse rib, that is, the hole-type structure of the first straight section. As shown in fig. 6, which is a hole pattern diagram without transverse ribs, the second inner circle 31 is a base circle part of the second hole pattern, and the second outer circles 32 are disposed on both sides of the second inner circle 31, so that both sides of the second outer circle 32 are tangent to both sides of the second inner circle 31. And further extends outwardly from the second notch plane 33 at both ends of the second outer circle 32. The radius of the second inner circle 31 is the same as the radius of the first inner circle 21, i.e. the radius of the second inner circle 31 is also R. The height of the second notch plane 33, i.e., the roll gap height, is S, and the range of S is preferably 0 to 0.01mm in the present embodiment. When the diameter of the rod body 1 is D, R is D/2+0.1mm, and the distance B between the two ends of the second outer circle 32 is 2R +0.6 mm.
Further, the width of the notch of the second hole-type structure is larger than that of the notch of the first hole-type structure.
Specifically, when the cross-ribbed section hole pattern and the cross-rib-free section base circular hole pattern cannot be designed to the same structure, otherwise when the cross rib is full, the lug is pushed out by the portion without the cross rib, and therefore, a widening process is required at the base circular hole pattern notch of the cross-rib-free portion, i.e., the first straight section (portion L1), so that the notch width of the second hole pattern structure is made larger than the notch width of the first hole pattern structure.
Example two
Fig. 8 is a schematic flow chart of a method for manufacturing a continuous rib anchor rod steel according to an embodiment of the present invention, and as shown in fig. 8, the method includes:
step 1: and turning the roller, namely turning the rolled piece into a first pass structure according to a first preset requirement by using a lathe.
Specifically, after the pass of the continuous rib anchor rod steel is designed, roll turning can be started, and first, a first pass structure is turned on a numerical control lathe according to a first preset requirement, that is, as shown in fig. 5, a pass is turned according to a "hole pattern with ribs", that is, a first inner circle 21 in the first pass structure.
Step 2: and milling the threads 4 on the rolled piece according to the preset requirements by using a milling machine.
Specifically, as shown in fig. 7, a cross-rib milling cutter is manufactured according to a "cross-rib milling cutter pattern diagram", and is programmed on a numerically controlled thread milling machine to mill a cross rib as required, that is, to machine threads 4 on the outer surfaces of the first cross-rib segment 11 and the second cross-rib segment 13.
And step 3: and turning out a second pass structure according to a second preset requirement, and assembling the finished product rolling mill by using the second pass structure roller.
Specifically, the second pass structure is turned according to the second preset requirement, that is, on the numerically controlled lathe, as shown in fig. 6, the base circle at the non-transverse rib position is turned according to the "rib-free pass base circle diagram" (which is equivalent to widening the original base circle notch position).
And 4, step 4: and assembling the finished product rolling mill on a steel rolling production line to produce the anchor rod steel.
Further, the roller is a tungsten carbide roller ring combined roller.
Further, the finishing mill is a short-stress mill, and the bounce range of the finishing mill is less than or equal to 0.2 mm.
Specifically, when the material of the roll is selected, since the roll is rolled without a roll gap, and the pass is required to be wear-resistant, in this embodiment, the tungsten carbide roll collar combined roll is selected, and further, the adjustment can be performed according to actual needs, and the embodiment is not particularly limited. Meanwhile, in order to ensure the rolling precision, a short-stress rolling mill is adopted by the finishing mill, and a new bearing is adopted by a roll bearing, so that the bounce of the rolling mill is not more than 0.2 mm.
And 5: and (3) carrying out radial fine adjustment on the upper roller by adopting a radial fine adjustment coupler, so that the anchor rod steel with continuous threads is obtained after the upper roller rotates for a preset angle along the axis of the roller.
Specifically, in the embodiment, the finished product rolling mill upper roll is preferably provided with the radial fine adjustment coupler, so that the upper roll can be subjected to radial fine adjustment through the radial fine adjustment coupler and can rotate for a certain angle along the axis of the rolling mill, and the purpose of completely aligning the spiral lines of the upper transverse rib and the lower transverse rib is achieved, so that the transverse ribs can be fully filled at the roll gaps, and the continuous spiral line transverse ribs are formed on the surface of the anchor rod steel.
Further, during rolling production, the upper roller and the lower roller of the finished rolling mill are tightly pressed, and certain prestress can be applied according to the capacity of the motor. Firstly, trial rolling a small sample, and adjusting the upper roller to radially fine tune the coupler until the helical lines of the upper and lower transverse ribs of a rolled piece at a rolling position are completely aligned. And after obtaining the anchor rod steel with continuous threads, continuously rolling the steel billet, and correspondingly adjusting a rolling mill before the finished product according to the filling condition of the transverse ribs and the base circle.
Therefore, the preparation method of the continuous rib anchor rod steel in the embodiment has the following characteristics: firstly, the anchor rod steel with the surface cross rib being continuous equal-height spiral cross rib can be produced. The continuous equal-height thread ribs are adopted, so that the anchoring force can be increased, and the generation of microcracks after thread rolling is reduced, thereby improving the radial stress capacity of the anchor rod and improving the anchoring effect. Through application design, the anchor rod steel with smaller diameter can achieve the same anchoring force, so that the aim of saving metal can be fulfilled; secondly, by adopting different hole type designs for base circles at the positions with the transverse ribs and the positions without the transverse ribs, the defect that lugs are not generated at the positions without the transverse ribs of the anchor rod steel (the anchor rod steel cannot be provided with the lugs) can be ensured under the condition that the transverse ribs are full; furthermore, rolling without roll gaps is implemented, and necessary guarantee is provided for the upper transverse rib and the lower transverse rib to be filled in the roll gaps; furthermore, by applying the radial fine adjustment coupler, the spiral lines of the transverse ribs of the upper roller and the lower roller can be accurately aligned, so that the transverse ribs are ensured to form continuous spiral ribs on the surface of the anchor rod steel; furthermore, the tungsten carbide roll collar combined roll ensures the batch industrial production under the condition of rolling without roll gaps by applying the wear-resistant tungsten carbide roll collar combined roll.
One or more technical solutions in the embodiments of the present invention at least have one or more of the following technical effects:
the embodiment of the invention provides continuous rib anchor rod steel and a preparation method thereof, and the continuous rib anchor rod steel comprises a rod body, wherein the rod body comprises: the bolt comprises a first transverse rib section, a first flat section and a second transverse rib section, wherein the first flat section is located at the tail end of the first transverse rib section, the second transverse rib section is located at the tail end of the first flat section, and threads are formed on the outer surfaces of the first transverse rib section and the second transverse rib section, so that transverse ribs on a bolt body of continuous rib anchor rod steel are formed. The first transverse rib section and the second transverse rib section are provided with a first hole type structure, and the first flat straight section is provided with a second hole type structure; backing plate and nut, the backing plate setting is at the end of the horizontal rib section of second, and the nut is installed and is kept away from the one side of the horizontal rib section of second in the backing plate, and nut and the body of rod spiro union. Therefore, the continuous equal-height thread ribs can increase the anchoring force and reduce the generation of microcracks after thread rolling, thereby improving the radial stress capacity of the anchor rod and improving the anchoring effect. Through application design, the anchor rod steel with smaller diameter can achieve the same anchoring force, so that the aim of saving metal can be fulfilled; through "there is cross rib department" and "no cross rib department" base circle adoption different pass design, can guarantee under the circumstances that the cross rib is full of, the stock steel does not have cross rib department and does not produce ear defect (the stock steel can not take the ear), thereby the stock steel surface is densely covered the cross rib among the prior art has been solved, the great production work hardening that warp, the crazing line easily appears, influence life, the relatively poor technical problem of cross rib end clearance department anchoring force, the production of crazing line after having reached the reduction thread rolling, thereby improve the radial atress ability of stock, improve the technological effect of anchoring effect.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (7)
1. A continuous rib anchor bar steel, comprising:
the body of rod, the body of rod includes:
a first transverse rib segment;
a first flat section located at an end of the first transverse rib section;
a second cross rib section located at an end of the first flat section;
wherein, all seted up screw thread on the surface of first horizontal rib section and the horizontal rib section of second, just first horizontal rib section, second horizontal rib section have first pass structure, first straight section has second pass structure, wherein, first pass structure includes:
the first outer circle is concentrically arranged outside the first inner circle;
a first notch plane to which one end of the first outer circle extends;
the second hole-type structure includes:
the second outer circle is arranged at two ends of the second inner circle and is tangent to the second inner circle;
a second notch plane to which an end of the second outer circle extends, and a radius of the second inner circle is the same as a radius of the first inner circle;
the width of the notch of the second hole-shaped structure is larger than that of the notch of the first hole-shaped structure;
a backing plate disposed at an end of the second transverse rib segment;
the nut is arranged on one side, far away from the second transverse rib section, of the base plate, and is in threaded connection with the rod body.
2. The continuous rib anchor steel of claim 1, wherein the thread is a left-hand thread or a right-hand thread.
3. A continuous rib anchor rod steel according to claim 1, wherein the thread is a continuous equal height thread.
4. A continuous rib anchor rod steel according to claim 1, wherein the first notch plane and the second notch plane have a height in the range of 0 to 0.01 mm.
5. A preparation method of continuous rib anchor rod steel is characterized by comprising the following steps:
turning a roller, namely turning a rolled piece into a first pass structure according to a first preset requirement by using a lathe;
milling threads on the rolled piece according to a preset requirement by using a milling machine;
turning out a second pass structure according to a second preset requirement, and assembling a finished product rolling mill by using a roller with the second pass structure;
assembling the finished product rolling mill on a steel rolling production line to produce the anchor rod steel;
and (3) carrying out radial fine adjustment on the upper roller by adopting a radial fine adjustment coupler, so that the anchor rod steel with continuous threads is obtained after the upper roller rotates for a preset angle along the axis of the roller.
6. The method of claim 5, wherein the roll is a tungsten carbide roll-ring combination roll.
7. The method of claim 5, wherein the finishing mill is a short stress mill and the finishing mill bounce range is less than or equal to 0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| JPH1193176A (en) * | 1997-09-22 | 1999-04-06 | Nippon Steel Metal Prod Co Ltd | Bearing member for method of slope stabilizing construction |
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| WO2012131579A1 (en) * | 2011-03-30 | 2012-10-04 | Rand York Castings (Proprietary) Limited | Steel bar |
| JP5420712B2 (en) * | 2012-04-19 | 2014-02-19 | 株式会社トーカイ | Deformed bar threaded rebar joint and its threaded deformed bar |
| CN102816971B (en) * | 2012-08-15 | 2014-01-01 | 安阳龙腾特钢制造有限公司 | Ultra high strength anchor pile with impact energy more than 100 J and manufacturing process thereof |
| CN204357462U (en) * | 2014-05-04 | 2015-05-27 | 刘永辉 | A kind of metal resin anchoring rod body |
| CN204371385U (en) * | 2014-12-17 | 2015-06-03 | 山东焱鑫矿用材料加工有限公司 | The anchor pole that thread rotary orientation is contrary |
| CN204755635U (en) * | 2015-07-07 | 2015-11-11 | 新兴铸管股份有限公司 | Phase place adjustable universal joint for rolling mill |
| CN209053626U (en) * | 2018-11-01 | 2019-07-02 | 莱芜市亿丰钢铁有限公司 | Multi-functional no longitudinal rib screw-thread steel |
| CN212105915U (en) * | 2020-03-05 | 2020-12-08 | 首钢长治钢铁有限公司 | Continuous rib anchor rod steel |
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