CN111842745A - Tool for preparing deformed steel bar and deformed steel bar preparation process - Google Patents
Tool for preparing deformed steel bar and deformed steel bar preparation process Download PDFInfo
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- CN111842745A CN111842745A CN202010746169.7A CN202010746169A CN111842745A CN 111842745 A CN111842745 A CN 111842745A CN 202010746169 A CN202010746169 A CN 202010746169A CN 111842745 A CN111842745 A CN 111842745A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 131
- 239000010959 steel Substances 0.000 title claims abstract description 131
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 134
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims description 54
- 238000000034 method Methods 0.000 claims description 20
- 230000007246 mechanism Effects 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 12
- 238000010791 quenching Methods 0.000 claims description 12
- 230000000171 quenching effect Effects 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 238000005496 tempering Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000005098 hot rolling Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 9
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
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- 238000003723 Smelting Methods 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 3
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- 230000035876 healing Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
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- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/04—Making by means of profiled-rolls or die rolls
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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Abstract
The invention provides a cutter for preparing deformed steel bars and a deformed steel bar preparation process, and relates to the fields of prestressed bridges, docks, wharfs, constructional engineering and the like. A cutter for preparing deformed steel bars comprises a cutter body and a thread rolling wheel body, wherein teeth of the thread rolling wheel body are in a continuous thread shape. The finish rolling threaded bar rolled by the cutter keeps all characteristics of the prior method for producing the deformed steel bar, and discontinuous external threads are changed into continuous external threads, so that the use is safer, and the thread precision is higher.
Description
Technical Field
The invention relates to the field of prestressed engineering construction, in particular to a cutter for preparing deformed steel bars and a deformed steel bar preparation process.
Background
The twisted steel for prestressed concrete (also called finish rolled twisted steel) is a straight steel bar with a large diameter, high strength and high dimensional accuracy, in which discontinuous external threads are rolled on the whole steel bar. The steel bar can be screwed with a connector with internal threads at any section to be connected or screwed with a nut with threads to be anchored, and has the advantages of simple connection, convenient construction and the like.
The conventional production method for rolling round steel into the twisted steel at present is to perform casting blank in a steel mill and then perform multi-pass rolling on a rolling mill for forming, and the process flow is as follows: converter smelting → ladle vanadium microalloying → LF refining → full protection casting billet → billet inspection → heating furnace heating → controlled rolling → controlled cooling after rolling. The production process is too complex, the main difficulty lies in high precision of the overall dimension and stable overall length, and the teeth must be adjusted by the phase adjusting device to ensure that the transverse ribs of the threads on two sides are on the same spiral line.
Disclosure of Invention
The invention aims to provide a tool for preparing deformed steel bars, which can roll hot-rolled round steel bars with continuous external threads, and is safer to use and higher in precision.
Another object of the present invention is to provide a process for producing a deformed steel bar, which can effectively reduce the process flow of finish rolling of the deformed steel bar.
The embodiment of the invention is realized by the following steps:
in a first aspect, the embodiment of the present application provides a tool for manufacturing deformed steel bars, which includes a thread rolling wheel body, wherein teeth of the thread rolling wheel body are in a continuous thread shape.
In some embodiments of the present invention, the thread profile of the thread rolling die body has a trapezoidal shape.
In some embodiments of the present invention, the pitch of the teeth is 10mm to 26mm, the height of the teeth is 1mm to 5mm, and the width of the teeth is 4.2mm to 15 mm.
In a second aspect, an embodiment of the present application provides a preparation process of the deformed steel bar, including the following steps:
s1, finishing the hot-rolled round steel to reach the required diameter before rolling the thread;
s2, placing the hot-rolled round steel on a transmission mechanism, and transmitting the hot-rolled round steel to heating equipment for uniform heating;
s3, continuously conveying the round steel heated in the step S2 to a thread rolling machine with a thread rolling wheel body through a conveying mechanism to roll threads;
s4, carrying out subsequent heat treatment on the deformed steel bar rolled in the step S3;
and S5, collecting the qualified finish-rolled deformed steel bars.
In some embodiments of the present invention, the conveying mechanism and the heating device in the step S2 adopt oblique roller conveying and medium frequency heating furnaces, respectively.
In some embodiments of the present invention, the heating temperature of the intermediate frequency heating furnace is 300 ℃ to 1150 ℃.
In some embodiments of the present invention, the rolling mill body for clamping rolling the finish rolled round steel in the step S3 is rotated in the same direction.
In some embodiments of the invention, the rotating speed of the thread rolling wheel body is 15 r/min-45 r/min.
In some embodiments of the present invention, the thread rolling machine in step S3 above employs a cooling device.
In some embodiments of the present invention, the post-heat treatment includes normalizing, tempering, quenching and tempering, and post-rolling residual heat quenching.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
the embodiment provides a cutter for preparing deformed steel bar, which comprises a thread rolling wheel body, wherein teeth of the thread rolling wheel body are in a thread shape. The finish rolling deformed steel bar rolled by the tool of the invention keeps all the characteristics of the finish rolling deformed steel bar produced by the original method, and discontinuous external threads are changed into continuous external threads, so the tool is safer to use, and the thread precision is higher.
When in actual use, the heated round steel is placed between the two thread rolling wheel bodies for rolling, radial compressive stress is provided for the round steel, and continuous external threads are rolled.
The embodiment provides a preparation process of the deformed steel bar, which comprises the following steps:
s1, finishing the hot-rolled round steel to reach the required diameter before rolling the thread;
s2, placing the hot-rolled round steel on a transmission mechanism, and transmitting the hot-rolled round steel to heating equipment for uniform heating;
s3, continuously conveying the round steel heated in the step S2 to a thread rolling machine with a thread rolling wheel body through a conveying mechanism to roll threads;
s4, carrying out subsequent heat treatment on the workpiece rolled in the step S3;
and S5, collecting the qualified finish-rolled deformed steel bars.
The invention breaks through the conventional production process of finish rolling threaded steel bars, the raw material adopts rolled round steel, multi-pass rolling mill equipment is not needed, the main processing equipment comprises thread rolling equipment and heating equipment, the thread rolling equipment is provided with a specially-made thread rolling wheel, the thread shape of the thread rolling wheel is consistent with the thread shape required by the threaded steel, the front section of the thread rolling machine is provided with a heating device, the round steel enters the thread rolling machine for hot rolling after passing through the heating device, and after the rolling is finished, the online heat treatment can be subsequently carried out to meet the mechanical property requirement of the finish rolling threaded steel bars.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of a thread rolling die body according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a tooth according to an embodiment of the present invention;
FIG. 3 is a flow chart of a process for preparing deformed steel bar according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a round steel rolled by the thread rolling roller body according to the embodiment of the invention.
Icon: 1-a thread rolling wheel body; 2-round steel; 3-heating equipment; 4-a thread roller; 5-cooling equipment.
Detailed Description
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. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, "a plurality" represents at least 2.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a thread rolling wheel body according to an embodiment of the present invention; fig. 2 is a schematic sectional view of a tooth according to an embodiment of the present invention.
The embodiment provides a cutter for preparing deformed steel bar, which comprises a thread rolling wheel body 1, wherein teeth of the thread rolling wheel body 1 are in a thread shape. The deformed steel bar rolled by the tool of the invention keeps all characteristics of deformed steel bar produced by the original method, and discontinuous external threads are changed into continuous external threads, thus the tool is safer to use and has higher thread precision. The thread roller body 1 is a tool for rolling threads by a method of plastic deformation of metal on a thread roller 4. The thread rolling wheel bodies 1 are arranged in the thread rolling machine 4, and are symmetrically distributed in pairs, and the round steel 2 rolls external threads by using clamping stress formed by the thread rolling wheel bodies 1 distributed in pairs.
In practical use, the heated hot-rolled round steel 2 is placed between the two rolling wheel bodies 1 for rolling, radial compressive stress is provided for the round steel 2, and continuous external threads are rolled.
In some embodiments of the present invention, as shown in fig. 2, the thread form of the thread rolling die body 1 has a trapezoidal shape. The teeth of the thread rolling wheel body 1 adopt a trapezoidal shape, so that the outer circle of the rolled round steel 2 also forms a trapezoidal external thread.
In some embodiments of the invention, as shown in fig. 1, the pitch of the teeth is 18mm, the height of the teeth is 2.5mm, and the width of the teeth is 9.6 mm.
In the above embodiment, the pitch of the teeth is 10mm, the height of the teeth is 1mm, and the width of the teeth is 4.2 mm.
In the above embodiment, the pitch of the teeth is 26mm, the height of the teeth is 5mm, and the width of the teeth is 15 mm.
Referring to fig. 3 and 4, fig. 3 is a flow chart illustrating a manufacturing process of deformed steel bar according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of the thread rolling die body 1 for rolling deformed steel bars according to the embodiment of the invention.
The embodiment provides a preparation process of the finish-rolled deformed steel bar, which comprises the following steps:
s1, finishing the hot-rolled round steel 2 to reach the required diameter before rolling the thread; rolling: the press working method is that the metal blank is passed through the gap between a pair of rotating rollers (various shapes), the material section is reduced and the length is increased due to the compression of the rollers, and the press working method is the most common production mode for producing steel products and is mainly used for producing section bars, plate materials and pipe materials. Hot rolling and cold rolling.
The round steel 2 in the present invention is hot rolling, and hot rolling (hot rolling) is rolling performed at a temperature lower than the recrystallization temperature, as opposed to cold rolling, which is rolling performed at a temperature higher than the recrystallization temperature. Briefly, a slab is heated, then rolled several times, trimmed, and straightened into a sheet, which is called hot rolling. Can obviously reduce energy consumption and cost. The metal plasticity is high during hot rolling, the deformation resistance is low, and the energy consumption of metal deformation is greatly reduced. Hot rolling can improve the processing property of metal and alloy, i.e. crushing the coarse grains in casting state, healing the cracks obviously, reducing or eliminating casting defects, converting the as-cast structure into a deformed structure and improving the processing property of the alloy. The hot rolling is characterized in that: 1. low energy consumption, good plastic processing, low deformation resistance, unobvious work hardening, easy rolling and reduced energy consumption required by metal deformation. 2. The hot rolling usually adopts large ingot casting and large reduction rolling, the production rhythm is fast, the yield is large, and thus, conditions are created for large-scale production. 3. The cast structure is converted into a processed structure by hot rolling, and the plasticity of the material is greatly improved by the conversion of the structure. 4. The characteristics of the rolling mode determine that the performance of the rolled plate has anisotropy, namely, the longitudinal direction, the transverse direction and the height direction of the material have obvious performance difference, and the deformation texture and the recrystallization texture exist, so that the punching performance has obvious directionality. The round steel 2 of the invention has the advantages of hot rolling: the crystal grains of the round steel 2 are refined, and the defect of the microstructure is eliminated, so that the structure of the round steel 2 is compact, and the mechanical property is improved. The improvement is mainly achieved in the rolling direction, so that the steel is no longer isotropic to some extent; bubbles, cracks and looseness formed in the casting process can also be welded under the action of high temperature and pressure, and the hot-rolled round steel 2 has high plasticity, so that the rolling process is smoother.
S2, placing the hot-rolled round steel 2 on a transmission mechanism, and rotationally transmitting the hot-rolled round steel to heating equipment 3 for uniform heating; the time for the round steel 2 to pass through the heating device 3 is the same as the advancing time of the thread rolling wheel body 1, and the rotating speed and the advancing speed of the round steel 2 are matched with those of the thread rolling machine 4.
S3, continuously conveying the round steel 2 heated in the step S2 to a thread rolling machine 4 with a thread rolling wheel body 1 through a conveying mechanism to roll threads; the thread rolling machine 4 is a multifunctional extrusion forming machine tool, and the thread rolling machine 4 can perform thread, straight line, cross grain rolling and other processing on a workpiece within the range of rolling force; rolling straight teeth, helical teeth and helical spline gears; straightening, reducing, roll finishing and various forming and rolling. The machine has a safe and reliable electro-hydraulic execution and control system, which can make each working cycle select among three modes of manual, semi-automatic and automatic. The thread rolling process is an advanced non-cutting process, can effectively improve the internal and surface quality of a workpiece, can obviously improve the fatigue strength and the torsional strength of the workpiece due to radial compressive stress generated during processing, and is an ideal process with high efficiency, energy saving and low consumption. The working principle of the thread rolling machine 4 is as follows: l, R are a pair of involute thread rolling wheel bodies 1 with the same parameters, which are respectively installed on two main shafts of the thread rolling machine 4 and can synchronously rotate in the same direction under the drive of a transmission mechanism. The R wheel can be driven by the oil cylinder to perform radial feeding motion, and the L wheel can be overlapped with the indentation of the R wheel on the surface of the workpiece P through the adjustment of the adjusting mechanism. The workpiece P is positioned and clamped by two central holes, the workpiece can be moved axially by adjusting the clamp, and can swing by a phi angle around an axis which passes through the O point on the clamp and is parallel to a machine tool spindle when stressed, so that the workpiece is always kept in a free opposite rolling state with two rolling wheels in a cold rolling process, the workpiece is convenient to clamp, and simultaneously, right-handed or left-handed round steel 2 with threads, namely deformed steel, can be processed by changing the rotation direction or the angle of the thread rolling wheel body 1.
S4, carrying out subsequent heat treatment on the round steel 2 rolled in the step S4;
and S5, collecting the qualified finish-rolled deformed steel bars.
The invention breaks through the conventional production process of finish rolling threaded steel bars, the raw material adopts rolled round steel 2, multi-pass rolling mill equipment is not needed, the main processing equipment comprises thread rolling equipment and heating equipment 3, the thread rolling equipment is provided with a specially-made thread rolling wheel, the thread shape of the thread rolling wheel conforms to the thread shape required by the finish rolling threaded steel, the front section of the thread rolling machine 4 is provided with a heating device, the round steel 2 enters the thread rolling machine 4 for hot rolling after passing through the heating device, and after the rolling is finished, the online heat treatment can be carried out subsequently to meet the mechanical property requirement of the finish rolling threaded steel bars.
In some embodiments of the present invention, as shown in fig. 3, the transfer mechanism and the heating apparatus 3 in step S2 employ a skew roller transfer and an intermediate-frequency heating furnace, respectively.
The oblique roller transmission is a roller way with the roller axis and the roller way central line mutually inclined, and is generally used for the transverse movement of a rolled piece of a cloth chess type rolling mill.
The medium frequency heating furnace is a power supply device which converts power frequency 50HZ alternating current into medium frequency (more than 300HZ to 1000HZ), converts three-phase power frequency alternating current into direct current after rectification, converts the direct current into adjustable medium frequency current, supplies the medium frequency alternating current flowing through a capacitor and an induction coil, generates high-density magnetic lines in the induction coil, cuts metal materials contained in the induction coil, and generates large eddy current in the metal materials. The medium frequency furnace has the advantages of high heating speed, high production efficiency, less oxidation and decarburization of the medium frequency furnace, prolonged service life of a die, superior working environment of the medium frequency furnace, improvement of the labor environment and the company image of workers of the medium frequency furnace, no pollution of the medium frequency furnace, low energy consumption of the medium frequency furnace, high smelting speed of the medium frequency furnace, good electricity-saving effect of the medium frequency furnace, less burning loss, low energy consumption, self-stirring function of the medium frequency furnace, uniform smelting temperature and metal components, good electric heating working environment of the medium frequency furnace, good starting performance of the medium frequency furnace, and 100 percent starting of both an empty furnace and a full furnace. Heating round steel 2 through intermediate frequency heating furnace because this heating method heating is even, and the core table difference in temperature is minimum, so still great increase the life-span of round steel 2 in the aspect of forging, because intermediate frequency induction heating's principle is electromagnetic induction, its heat self produces in the work piece, ordinary workman can carry out the continuous operation of forging the task with very minute after the intermediate frequency electric stove is on duty, need not burn the stove professional workman and carry out the work of burning a stove and sealing a stove in advance. The waste phenomenon of the heated blank of the coal stove caused by power failure or equipment failure is not worried. Because the heating mode has high temperature rise speed, the oxidation is very little, 20-50 kg of steel raw materials are saved compared with a coal burning furnace for each ton of forgings, the material utilization rate can reach 95 percent, and the use and forging cost is greatly reduced.
In some embodiments of the present invention, as shown in FIG. 3, the heating temperature of the intermediate frequency furnace is 725 ℃.
In some embodiments of the present invention, as shown in fig. 4, the roll body 1 for pinch-rolling the finish-rolled round steel 2 in step S3 is rotated in the same direction. The pair of thread rolling wheel bodies 1 for rolling the finish rolling round steel 2 rotate in the same direction, so that the finish rolling round steel 2 can be rolled in a thread shape.
In some embodiments of the invention, the rotational speed of the die roller body 1 is 30r/min, as shown in FIG. 4. The rolling at the rotating speed of 30r/min can ensure that the rolling wheel body 1 can effectively roll the round steel 2 without clamping a cutter.
In some embodiments of the present invention, as shown in fig. 3, the screw rolling machine 4 employs the cooling device 5 to cool the screw roller body 1 in step S3. Built-in cooling arrangement 5 in thread rolling machine 4, cooling arrangement 5 is in order to prevent that the too high hardness that leads to of in-process thread rolling wheel body 1 temperature at continuous rolling screw reduces, appears dull sword when avoiding rolling round steel 2 and leads to rolling line to appear the problem emergence of deviation.
In some embodiments of the invention, the post heat treatment comprises normalizing, tempering, post-rolling residual heat quenching processes. Normalizing is a heat treatment for improving the toughness of steel, and is mainly characterized in that the cooling speed is faster than annealing and lower than quenching, and crystal grains of the steel can be refined in slightly fast cooling during normalizing, so that not only can satisfactory strength be obtained, but also the toughness can be obviously improved; quenching and tempering refers to a heat treatment process for improving the comprehensive mechanical properties of steel materials. Namely, high-temperature tempering treatment is carried out after quenching. The steel part has good matching of strength and toughness, high strength, excellent toughness, plasticity, cutting performance and the like; the waste heat quenching refers to quenching by utilizing waste heat of other hot working. Quenching the steel material before the steel material is cooled after the high-temperature deformation. This process is also called residual heat strengthening because it can greatly improve the strength and toughness of the steel.
In summary, embodiments of the present invention provide a tool for manufacturing deformed steel bars and a deformed steel bar manufacturing process; a cutter for preparing deformed steel bar comprises a thread rolling wheel body 1, wherein teeth of the thread rolling wheel body 1 are in a thread shape. The deformed steel bar rolled by the tool of the invention keeps all characteristics of deformed steel bar produced by the original method, and discontinuous external threads are changed into continuous external threads, thus the tool is safer to use and has higher thread precision.
In practical use, the heated hot-rolled round steel 2 is placed between the two rolling wheel bodies 1 for rolling, radial compressive stress is provided for the round steel 2, and continuous external threads are rolled.
The embodiment provides a preparation process of the deformed steel bar, which comprises the following steps:
s1, finishing the hot-rolled round steel 2 to reach the required diameter before rolling the thread;
s2, placing the hot-rolled round steel 2 on a transmission mechanism, and rotationally transmitting the hot-rolled round steel to heating equipment 3 for uniform heating;
s3, continuously conveying the round steel 2 heated in the step S2 to a thread rolling machine 4 with a thread rolling wheel body 1 through a conveying mechanism to roll threads;
s4, according to the requirements of different grades of the round steel 2, carrying out subsequent treatment including normalizing, tempering and after-rolling waste heat quenching;
and S5, collecting qualified finish-rolled deformed steel bars.
The invention breaks through the conventional production process of finish rolling threaded steel bars, the raw material adopts rolled round steel 2, multi-pass rolling mill equipment is not needed, the main processing equipment comprises thread rolling equipment and heating equipment 3, the thread rolling equipment is provided with a specially-made thread rolling wheel, the tooth form of the thread rolling wheel conforms to the tooth form required by the threaded steel, the front section of the thread rolling machine 4 is provided with a heating device, the round steel 2 enters the thread rolling machine 4 for hot rolling after passing through the heating device, and after the rolling is finished, the subsequent on-line heat treatment can be carried out to meet the mechanical property requirement of the finish rolling threaded steel bars.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The cutter for preparing the deformed steel bar is characterized by comprising a thread rolling wheel body, wherein teeth of the thread rolling wheel body are in a continuous thread shape.
2. The tool for manufacturing deformed steel bars according to claim 1, wherein the thread form of the die roller body has a trapezoidal shape.
3. The tool for manufacturing deformed steel bars according to claim 2, wherein the pitch of the teeth is 10mm to 26mm, the height of the teeth is 1mm to 5mm, and the width of the teeth is 4.2mm to 15 mm.
4. A process for the preparation of a deformed steel bar according to any one of claims 1 to 3, comprising the following steps:
s1, finishing the hot-rolled round steel to reach the required diameter before rolling the thread;
s2, placing the hot-rolled round steel on a transmission mechanism, and transmitting the hot-rolled round steel to heating equipment for uniform heating;
s3, continuously conveying the round steel heated in the step S2 to a thread rolling machine with a thread rolling wheel body through a conveying mechanism to roll threads;
s4, carrying out subsequent heat treatment on the round steel rolled in the step S4;
and S5, collecting the qualified finish-rolled deformed steel bars.
5. The process according to claim 4, wherein the conveying mechanism and the heating device in step S2 are a skew roll conveying and medium-frequency heating furnace, respectively.
6. A process for preparing deformed steel bar according to claim 5, wherein the heating temperature of the intermediate frequency heating furnace is 300 ℃ to 1150 ℃.
7. The process for producing a deformed steel bar according to claim 4, wherein the barrel bodies for the finish-rolled deformed steel bar are rotated in the same direction in the step S3.
8. The process for preparing deformed steel bar according to claim 7, wherein the rotating speed of the thread rolling die body is 15r/min to 45 r/min.
9. The process of claim 4, wherein the thread rolling machine in step S3 adopts a cooling device to cool the thread rolling wheel.
10. The process for preparing deformed steel bar according to claim 4, wherein the subsequent heat treatment comprises normalizing, tempering, quenching and tempering, and post-rolling residual heat quenching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010746169.7A CN111842745A (en) | 2020-07-29 | 2020-07-29 | Tool for preparing deformed steel bar and deformed steel bar preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010746169.7A CN111842745A (en) | 2020-07-29 | 2020-07-29 | Tool for preparing deformed steel bar and deformed steel bar preparation process |
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| SU547272A1 (en) * | 1974-03-25 | 1977-02-25 | Trapezoid roller | |
| CN201124211Y (en) * | 2007-09-29 | 2008-10-01 | 朱志远 | Trapezoidal thread rolling mould |
| KR20100110420A (en) * | 2009-04-03 | 2010-10-13 | 김광호 | Rebar taping process |
| KR101007545B1 (en) * | 2009-12-11 | 2011-01-14 | 광신철강산업(주) | Method for forming threads on the joint portions of steel bar |
| CN105499451A (en) * | 2016-01-05 | 2016-04-20 | 江苏赫夫特齿轮制造有限公司 | Novel thread rolling machine for deformed steel bar used in building |
| CN205851754U (en) * | 2016-06-23 | 2017-01-04 | 耐世特汽车系统（苏州）有限公司 | The screw thread of worm screw extruded lathe roll die in a kind of automobile steering system |
| JP2019203579A (en) * | 2018-05-25 | 2019-11-28 | 山田 榮子 | High tensile strength bolt and manufacturing method thereof |
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2020
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU547272A1 (en) * | 1974-03-25 | 1977-02-25 | Trapezoid roller | |
| CN201124211Y (en) * | 2007-09-29 | 2008-10-01 | 朱志远 | Trapezoidal thread rolling mould |
| KR20100110420A (en) * | 2009-04-03 | 2010-10-13 | 김광호 | Rebar taping process |
| KR101007545B1 (en) * | 2009-12-11 | 2011-01-14 | 광신철강산업(주) | Method for forming threads on the joint portions of steel bar |
| CN105499451A (en) * | 2016-01-05 | 2016-04-20 | 江苏赫夫特齿轮制造有限公司 | Novel thread rolling machine for deformed steel bar used in building |
| CN205851754U (en) * | 2016-06-23 | 2017-01-04 | 耐世特汽车系统（苏州）有限公司 | The screw thread of worm screw extruded lathe roll die in a kind of automobile steering system |
| JP2019203579A (en) * | 2018-05-25 | 2019-11-28 | 山田 榮子 | High tensile strength bolt and manufacturing method thereof |
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