Heating device capable of improving performance of cold-rolled ribbed steel bar and method thereof

Abstract

The invention discloses a heating device capable of improving the performance of cold-rolled ribbed steel bars and a method thereof, and belongs to the technical field of rolled steel bar heating devices. The device comprises a heating furnace, a driving mechanism is arranged at the top of the heating furnace, a push rod is arranged at the output end of the driving mechanism, and a turning plate mechanism assembly is arranged at the top end of the driving mechanism; the turning plate mechanism assembly comprises a hydraulic telescopic cylinder, a telescopic rod, a turning support, a turning plate and a movable support, a first through hole and a second through hole are formed in the surface of the turning support, a first hinge shaft is installed in the first through hole, and a second hinge shaft is installed in the second through hole; the overturning support is movably connected with the push rod through a second hinge shaft, and the overturning support is movably connected with the telescopic rod through a first hinge shaft. The organization structure and internal stress of grains can be refined through heat treatment of the heating furnace, so that the defects of medium-frequency induction heating are overcome, and the purpose of adjusting the performance of the cold-rolled ribbed steel bar is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of post-rolling steel bar heating devices, and more specifically, to a heating device and method capable of improving the performance of cold-rolled ribbed steel bars. Background Art

[0002] Cold-rolled ribbed steel bars are steel bars with transverse ribs evenly distributed along the length direction on their surfaces after cold rolling of hot-rolled wire rods. Through rolling, the steel bars are work-hardened, and their properties change. The strength increases but the elongation decreases. For cold-rolled ribbed steel bar products, the performance of the raw material hot-rolled wire rods has the greatest impact on their final performance. Under the condition that the rolling reduction ratio is basically determined in conventional cold rolling, the adjustment of physical performance indicators such as strength and elongation is achieved through stress relief. The principle is to release the stress generated during the rolling process by bending multiple times to change the performance. However, this method has weak adjustment ability and poor effects. There is also an on-line intermediate frequency induction heating device in the market. After rolling, the steel bars pass through this device and are rapidly heated at high temperature for a short time for stabilization quenching and tempering, grain refinement, improvement of internal structure and product performance, and the effect has been greatly improved. However, this method has high investment cost and poor stability in performance improvement. Summary of the Invention

[0003] 1. Technical Problems to be Solved by the Invention

[0004] In view of the defects and deficiencies existing in the prior art, the present invention provides a heating device and method capable of improving the performance of cold-rolled ribbed steel bars. Through the heat treatment of the heating furnace, the organizational structure and internal stress of the steel bars can be refined to overcome the deficiencies of intermediate frequency induction heating and achieve the purpose of adjusting the performance of cold-rolled ribbed steel bars.

[0005] 2. Technical Solutions

[0006] To achieve the above object, the technical solutions provided by the present invention are as follows:

[0007] A heating device capable of improving the performance of cold-rolled ribbed steel bars according to the present invention includes a heating furnace. An inlet door is provided on one side of the heating furnace, an outlet door is provided on the other side of the heating furnace, and a track is provided at the bottom of the heating furnace;

[0008] A driving mechanism is provided at the top of the heating furnace. A push rod is provided at the output end of the driving mechanism, and a flap mechanism assembly is provided at the top of the driving mechanism;

[0009] The flap mechanism assembly comprises a hydraulic telescopic cylinder, a telescopic rod, a flip support, a flap and a movable support, the hydraulic telescopic cylinder is mounted on the upper surface of the driving mechanism through the movable support, the output end of the hydraulic telescopic cylinder is provided with a telescopic rod, the front end of the telescopic rod is provided with a flip support, the surface of the flip support is respectively provided with a first through hole and a second through hole, the first through hole is provided with a first hinge shaft, and the second through hole is provided with a second hinge shaft;

[0010] The flip support is movably connected to the push rod via the second hinge shaft, and the flip support is movably connected to the telescopic rod via the first hinge shaft.

[0011] Furthermore, a cold rolling wire take-up machine is provided at the input end of the heating furnace, and a cold rolling mill is provided at the input end of the cold rolling wire take-up machine. The fully loaded I-shaped pulley after being taken up by the cold rolling wire take-up machine enters the heating furnace through the entrance door.

[0012] Furthermore, the heating furnace can be an electric heating furnace, an oil combustion heating furnace or a liquefied gas combustion heating furnace, and the heating furnace can set a corresponding heating temperature according to the control requirements of the performance of the cold-rolled ribbed steel bars.

[0013] Furthermore, the driving mechanism drives the push rod to move forward and backward, and the hydraulic telescopic cylinder drives the flip support to flip around the second hinge axis through the telescopic rod.

[0014] Furthermore, the input end of the track extends to the bottom of the output end of the cold rolling wire winding machine.

[0015] A method for a heating device capable of improving the performance of cold-rolled ribbed steel bars, the working steps of which are as follows:

[0016] Step 1: unload the fully loaded I-shaped wheel rolled by the cold rolling mill and taken up by the cold rolling take-up machine, and put it into the track;

[0017] Step 2: Open the entrance door and exit door of the heating furnace at the same time, and the push rod is driven by the driving mechanism to extend forward to the position. During the extension process, the hydraulic telescopic cylinder also drives the telescopic rod to extend synchronously, so that the flap and the push rod extend forward synchronously;

[0018] Step 3: After the push rod is extended to the right position, the hydraulic telescopic cylinder continues to drive the telescopic rod to extend, so that the flap is turned around the second hinge axis, and the flap is in a flipped down state;

[0019] Step 4: Start the driving mechanism to drive the push rod to retract, and the hydraulic telescopic cylinder also drives the telescopic rod to retract synchronously. During the retraction process, the flap drives the fully loaded I-shaped wheel into the heating furnace, and at the same time, the rear fully loaded I-shaped wheel in the heating furnace is pushed out of the heating furnace;

[0020] Step 5: Close the inlet door and the outlet door, and start the heating furnace to heat the cold-rolled ribbed steel bars on the fully loaded I-shaped wheel according to the requirements of the heat treatment heating curve of the steel bars;

[0021] Step 6: After the heating time meets the requirements, repeat the above steps. The full-load spools entering will push out the spools at the tail of the heating furnace, completing the performance improvement of cold-rolled ribbed steel bars. Continuous operation can be achieved through sequential cycling.

[0022] 3. Beneficial effects

[0023] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects:

[0024] Through the heat treatment of the heating furnace, the present invention can refine the grain structure and internal stress of cold-rolled ribbed steel bars to overcome the deficiencies of intermediate frequency induction heating and achieve the purpose of adjusting the performance of cold-rolled ribbed steel bars. Description of the drawings

[0025] Figure 1 It is the overall structure diagram of the present invention;

[0026] Figure 2 It is the partial structure diagram of the present invention;

[0027] Figure 3 It is the structure diagram of the flap mechanism assembly of the present invention;

[0028] Figure 4 It is the retracted state diagram of the driving mechanism of the present invention;

[0029] Figure 5 It is the raised state diagram of the flap of the present invention;

[0030] Figure 6 It is the replacement state diagram of the empty spool of the present invention.

[0031] In the figure: 1, empty spool; 2, push rod; 3, flap mechanism assembly; 31, hydraulic telescopic cylinder; 32, telescopic rod; 33, flipping support; 331, first through hole; 332, second through hole; 333, first hinge shaft; 334, second hinge shaft; 34, flap; 35, movable support; 4, inlet door; 5, driving mechanism; 6, heating furnace; 7, outlet door; 8, full-load spool; 9, track; 10, cold rolling wire drawing machine; 11, cold rolling mill. Specific embodiments

[0032] The following further describes the present invention in conjunction with the drawings and embodiments:

[0033] Embodiment 1

[0034] From Figure 1-6 It can be seen that a heating device capable of improving the performance of cold-rolled ribbed steel bars in this embodiment includes a heating furnace 6. An inlet door 4 is provided on one side of the heating furnace 6, an outlet door 7 is provided on the other side of the heating furnace 6, and a track 9 is provided at the bottom of the heating furnace 6;

[0035] At the input end of the heating furnace 6, a cold rolling wire drawing machine 10 is provided. At the input end of the cold rolling wire drawing machine 10, a cold rolling mill 11 is provided. The fully loaded spools 8 after being wound by the cold rolling wire drawing machine 10 enter the heating furnace 6 through the inlet door 4. The input end of the track 9 extends to the bottom of the output end of the cold rolling wire drawing machine 10, facilitating the movement and transportation of the fully loaded spools 8 thereon.

[0036] The heating furnace 6 can be an electric heating furnace, an oil combustion heating furnace, or a liquefied gas combustion heating furnace. The heating furnace 6 can set the corresponding heating temperature according to the regulation requirements of the properties of cold-rolled ribbed steel bars.

[0037] The length of the heating furnace 6 is determined according to the number of fully loaded spools 8 inside, and the number of fully loaded spools 8 can depend on the production efficiency of cold-rolled ribbed steel bars and the heating time.

[0038] At the top of the heating furnace 6, a driving mechanism 5 is provided. At the output end of the driving mechanism 5, a push rod 2 is provided. At the top of the driving mechanism 5, a flap mechanism assembly 3 is provided.

[0039] The flap mechanism assembly 3 includes a hydraulic telescopic cylinder 31, a telescopic rod 32, a flipping support 33, a flap 34, and a movable support 35. The hydraulic telescopic cylinder 31 is installed on the upper surface of the driving mechanism 5 through the movable support 35. At the output end of the hydraulic telescopic cylinder 31, a telescopic rod 32 is provided. At the front end of the telescopic rod 32, a flipping support 33 is provided. On the surface of the flipping support 33, a first through hole 331 and a second through hole 332 are respectively formed. A first hinge shaft 333 is installed in the first through hole 331, and a second hinge shaft 334 is installed in the second through hole 332.

[0040] The flipping support 33 is movably connected to the push rod 2 through the second hinge shaft 334, and the flipping support 33 is movably connected to the telescopic rod 32 through the first hinge shaft 333.

[0041] The driving mechanism 5 drives the push rod 2 to move back and forth, and the hydraulic telescopic cylinder 31 drives the flipping support 33 to perform a fixed-axis flip around the second hinge shaft 334 through the telescopic rod 32.

[0042] Embodiment 2

[0043] From Figure 1-6 It can be seen that for a method of a heating device capable of improving the properties of cold-rolled ribbed steel bars in this embodiment, its working steps are as follows:

[0044] Step 1: Unload the fully loaded spools 8 that have been rolled by the cold rolling mill 11 and wound by the cold rolling wire drawing machine 10, and enter the track 9.

[0045] Step 2: Open the inlet door 4 and the outlet door 7 of the heating furnace 6 simultaneously. The push rod 2 is driven by the driving mechanism 5 to extend forward to the in-place position. During the extension process, the hydraulic telescopic cylinder 31 also drives the telescopic rod 32 to extend synchronously, so that the flap 34 extends forward synchronously with the push rod 2;

[0046] Step 3: After the push rod 2 extends to the in-place position, the hydraulic telescopic cylinder 31 continuously drives the telescopic rod 32 to extend, so that the flap 34 rotates around the second hinge shaft 334 in a fixed-axis manner, and the flap 34 is in a flipped-down state;

[0047] Step 4: Start the driving mechanism 5 to drive the push rod 2 to retract. The hydraulic telescopic cylinder 31 also drives the telescopic rod 32 to retract synchronously. During the retraction process, the flap 34 drives the fully loaded spool 8 into the heating furnace 6, and at the same time, the tail fully loaded spool 8 in the heating furnace 6 is pushed out of the heating furnace 6;

[0048] Step 5: Close the inlet door 4 and the outlet door 7, and start the heating furnace 6 to heat the cold-rolled ribbed steel bars on the fully loaded spool 8 inside according to the requirements of the heat treatment heating curve of the steel bars;

[0049] Step 6: When the heating time meets the requirements, repeat the above steps. The incoming fully loaded spool 8 pushes out the spool at the tail of the heating furnace 6 to complete the performance improvement of the cold-rolled ribbed steel bars; By circulating in sequence, continuous operation can be achieved.

[0050] When unloading the fully loaded spool 8, the empty spool 1 can be fed into the cold rolling take-up machine 10 through the gap between the heating furnace 6 and the cold rolling take-up machine 10 for replacement;

[0051] Through the heat treatment of the heating furnace 6, the present invention can refine the grain structure and internal stress of the cold-rolled ribbed steel bars to overcome the deficiencies of intermediate frequency induction heating and achieve the purpose of adjusting the performance of the cold-rolled ribbed steel bars.

[0052] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and without departing from the purpose of the present invention, without creative design, they design a structural manner and an embodiment similar to the technical solution, which shall fall within the protection scope of the present invention.

Claims

1. A heating device capable of improving the performance of cold-rolled ribbed steel bars, comprising a heating furnace (6), characterized in that: An inlet door (4) is provided on one side of the heating furnace (6), an outlet door (7) is provided on the other side of the heating furnace (6), and a track (9) is provided at the bottom of the heating furnace (6); A driving mechanism (5) is arranged on the top of the heating furnace (6), a push rod (2) is arranged at the output end of the driving mechanism (5), and a flap mechanism assembly (3) is arranged at the top of the driving mechanism (5); The flap mechanism assembly (3) comprises a hydraulic telescopic cylinder (31), a telescopic rod (32), a flip support (33), a flap (34) and a movable support (35); the hydraulic telescopic cylinder (31) is mounted on the upper surface of the driving mechanism (5) via the movable support (35); the output end of the hydraulic telescopic cylinder (31) is provided with a telescopic rod (32); the front end of the telescopic rod (32) is provided with a flip support (33); a first through hole (331) and a second through hole (332) are respectively formed on the surface of the flip support (33); a first hinge shaft (333) is mounted in the first through hole (331); and a second hinge shaft (334) is mounted in the second through hole (332); The flip support (33) is movably connected to the push rod (2) via the second hinge shaft (334), and the flip support (33) is movably connected to the telescopic rod (32) via the first hinge shaft (333).

2. The heating device capable of improving the properties of cold-rolled ribbed steel bars according to claim 1, characterized in that: The input end of the heating furnace (6) is provided with a cold rolling wire take-up machine (10), and the input end of the cold rolling wire take-up machine (10) is provided with a cold rolling mill (11). After being taken up by the cold rolling wire take-up machine (10), the fully loaded I-shaped wheel (8) enters the heating furnace (6) through the entrance door (4).

3. The heating device capable of improving the properties of cold-rolled ribbed steel bars according to claim 1, characterized in that: The heating furnace (6) may be an electric heating furnace, an oil combustion heating furnace or a liquefied gas combustion heating furnace. The heating furnace (6) may be set to a corresponding heating temperature according to the control requirements of the performance of the cold-rolled ribbed steel bars.

4. A heating device capable of improving the properties of cold-rolled ribbed steel bars according to claim 1, characterized in that: The driving mechanism (5) drives the push rod (2) to move forward and backward, and the hydraulic telescopic cylinder (31) drives the flip support (33) to flip around the second hinge axis (334) via the telescopic rod (32).

5. A heating device capable of improving the properties of cold-rolled ribbed steel bars according to claim 1, characterized in that: The input end of the track (9) extends to the bottom of the output end of the cold rolling wire winding machine (10).

6. The method of a heating device capable of improving the properties of cold-rolled ribbed steel bars according to claim 1, characterized in that: The working steps are as follows: Step 1: unloading the fully loaded I-shaped wheel (8) rolled by the cold rolling mill (11) and wound by the cold rolling wire winding machine (10), and placing it on the track (9); Step 2: The inlet door (4) and the outlet door (7) of the heating furnace (6) are opened simultaneously, and the push rod (2) is driven by the driving mechanism (5) to extend forward to the desired position. During the extension process, the hydraulic telescopic cylinder (31) also drives the telescopic rod (32) to extend synchronously, so that the flap (34) and the push rod (2) extend forward synchronously; Step 3: After the push rod (2) is extended to the right position, the hydraulic telescopic cylinder (31) continuously drives the telescopic rod (32) to extend, thereby causing the flap (34) to flip around the second hinge axis (334) and the flap (34) to be in a flipped-down state; Step 4: Start the driving mechanism (5) to drive the push rod (2) to retract, and the hydraulic telescopic cylinder (31) also drives the telescopic rod (32) to retract synchronously. During the retraction process, the flap (34) drives the fully loaded spool (8) into the heating furnace (6), and at the same time, the fully loaded spool (8) at the tail in the heating furnace (6) is pushed out of the heating furnace (6); Step 5: Close the inlet door (4) and the outlet door (7), and start the heating furnace (6) to heat the cold-rolled ribbed steel bars on the fully loaded spool (8) inside according to the requirements of the heat treatment temperature rise curve of the steel bars; Step 6: When the heating time meets the requirements, repeat the above steps. The incoming fully loaded spool (8) pushes out the spool at the tail of the heating furnace (6) to complete the performance improvement of the cold-rolled ribbed steel bars; By circulating in sequence, continuous operation can be achieved.

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