Production process of hot-rolled ribbed steel bar

Abstract

The invention belongs to the technical field of steel bar production, and discloses a hot-rolled ribbed steel bar production process which comprises a rack, three positioning frames are welded to the top end of the rack at equal intervals, lower positioning blocks are symmetrically and fixedly installed in the three positioning frames, and lower rolling wheels are rotationally connected into the lower positioning blocks; threaded rods are symmetrically connected to the top ends of the inner walls of the three positioning frames through threads, the outer sides of the threaded rods are sleeved with upper positioning blocks slidably connected with the positioning frames, the upper rolling wheels are rotationally connected into the upper rolling wheels, the situation that external foreign matter enters a rolling area is reduced through a gas waterfall, the surface of strip steel can be effectively protected, and the service life of the strip steel is prolonged. The surface smoothness and uniformity of strip steel are improved, dust and other small particles can be prevented from making direct contact with equipment, abrasion to mechanical parts is reduced, the service life of the equipment is prolonged, the maintenance frequency and cost are reduced, the temperature of a rolling area can be lowered, and the equipment is prevented from being overheated.

Description

Technical Field

[0001] The invention belongs to the technical field of steel bar production, and in particular relates to a production process of hot-rolled ribbed steel bars. Background Art

[0002] Hot-rolled ribbed steel bars are an important material widely used in construction projects. They are mainly used to enhance the bearing capacity and tensile strength of concrete structures. With the rapid development of the construction industry, the performance and quality requirements of steel bars are also increasing. Therefore, the production process of hot-rolled ribbed steel bars is particularly important. During the hot rolling process, the steel bars need to enter the rolling area of ​​the rolling mill. At this time, the metal chips and dust remaining on the surface of the steel bars enter the rolling area, causing mechanical damage to the rolling mill. Summary of the invention

[0003] The present invention aims at the problem that in the prior art, during the hot rolling process of steel bars, the steel bars need to enter the rolling area of ​​the rolling mill. At this time, metal chips and dust remaining on the surface of the steel bars enter the rolling area, thereby causing mechanical damage to the rolling mill. The present invention proposes the following technical solution:

[0004] A hot-rolled ribbed steel bar production process comprises the following steps:

[0005] S1: Raw material preparation: select suitable steel billet and heat it;

[0006] S2: Hot rolling: The heated steel billet is initially rolled through a preliminary rolling mill to form a rough billet, and then enters multiple rolling mills for finishing rolling;

[0007] S3: Cooling: Cooling the rolled steel bars;

[0008] S4: Cutting: Cut the cooled steel bars into required lengths.

[0009] Preferably, the rolling mill unit comprises a frame, three positioning frames are welded at equal distances on the top of the frame, lower positioning blocks are symmetrically fixedly installed inside the three positioning frames, lower rolling wheels are rotatably connected inside the lower positioning blocks, threaded rods are symmetrically connected to the tops of the inner walls of the three positioning frames through threads, upper positioning blocks slidably connected to the positioning frames are sleeved on the outer sides of the threaded rods, upper rolling wheels are rotatably connected inside the upper rolling wheels, and chain transmission structures are connected between the three lower rolling wheels;

[0010] A gas waterfall blowing assembly is fixedly installed on the outer side of the lower rolling wheel and the upper rolling wheel, and the gas waterfall blowing assembly includes a circular ring fixedly installed on the outer side of the lower rolling wheel and the upper rolling wheel, a support plate is welded at one end of the circular ring, a mounting plate is welded on the inner wall of the support plate, a guide plate is equidistantly welded on one end of the support plate, a filter screen is clamped and installed on the outer side of the mounting plate and the support plate, and a metal bellows is equidistantly embedded in the inside of the circular ring.

[0011] Preferably, a conical head is fixedly mounted on one end of the metal bellows, and a flow guide cover is fixedly mounted on one end of the conical head.

[0012] Preferably, barrier strips are rotatably connected inside the circular rings of the lower rolling wheel and the upper rolling wheel, and circular positioning rings are penetrated and connected inside the barrier strips.

[0013] Preferably, a triangular plate is welded to the bottom end of the inner wall of the barrier strip located on the lower rolling wheel, and an arc plate is welded to the bottom end of the inner wall of the barrier strip located on the upper rolling wheel.

[0014] Preferably, the barrier strips of the lower rolling wheel and the upper rolling wheel are both arc-shaped, and the notches of the barrier strips of the lower rolling wheel and the upper rolling wheel are arranged in opposite directions.

[0015] Preferably, a synchronous single-control adjusting component is fixedly installed on the top of the threaded rod, and the synchronous single-control adjusting component includes a movable plate rotatably installed on the top of the threaded rod and the movable plate is slidably connected to the inside of the positioning frame, an inner serrated pulley is fixedly installed on the outside of the threaded rod at the top position of the movable plate, an inner serrated belt is sleeved between the two inner serrated pulleys, a cylinder is rotatably connected to the middle part of the inner wall of the movable plate, a rotating block is welded on the top of the cylinder, spring rods are symmetrically clamped and installed on both sides of the rotating block, a movable seat is clamped and installed at one end of the spring rod, and an extrusion wheel is rotatably connected to the inside of the movable seat.

[0016] Preferably, a rectangular rod is slidably connected inside the cylinder, a disc is welded to the bottom end of the rectangular rod, and a plug-in column is welded to the top end of the disc.

[0017] Preferably, a circular hole is provided at the bottom end of the inner wall of the positioning frame corresponding to the top end of the plug-in column, the number of the circular holes is set to be multiple, and the multiple circular holes are arranged in a circular array with the center point of the cylinder as a reference.

[0018] The beneficial effects of the present invention are:

[0019] (1) The gas waterfall reduces the entry of foreign matter (such as dust, metal chips, etc.) into the rolling area, effectively protects the surface of the strip, improves the surface finish and uniformity of the strip, and prevents dust and other tiny particles from directly contacting the equipment, reducing the wear on mechanical parts, thereby extending the service life of the equipment, reducing maintenance frequency and cost, and helping to reduce the temperature of the rolling area to prevent the equipment from overheating;

[0020] (2) The synchronous rotation of the threaded rod can be achieved by a single person, which greatly simplifies the operation process, reduces manpower requirements and workload, is suitable for different operating environments and manpower configurations, improves work efficiency, and avoids the synchronous rotation deviation of the threaded rod caused by vibration when using traditional mechanical structures, thereby causing the position of the upper rolling wheel to change, thereby ensuring the precise adjustment of the upper rolling wheel during the lifting process, improving the stability of product quality, and reducing the influence of equipment vibration on the position of the upper rolling wheel, reducing positioning deviation, and improving processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 What is shown is a structural schematic diagram of a hot-rolled ribbed steel bar production process in Example 1;

[0022] Figure 2 The figure shows a schematic diagram of the installation structure of the upper rolling wheel in the embodiment 1;

[0023] Figure 3 The structure diagram of the gas waterfall blowing assembly in Example 1 is shown;

[0024] Figure 4 Shown is a cross-sectional view of the mounting plate in Example 1;

[0025] Figure 5 The figure shows a schematic diagram of the installation structure of the triangle plate in the first embodiment;

[0026] Figure 6 Shown is a cross-sectional view of the filter screen in Example 1;

[0027] Figure 7 The figure shows a schematic diagram of the installation structure of the curved plate in Example 1;

[0028] Figure 8 What is shown is a schematic diagram of the structure of the synchronous single-control adjustment component in Example 1;

[0029] Fig. 9 What is shown is a schematic diagram of the installation structure of the plug-in column in Example 1.

[0030] In the figure: 1. frame; 2. positioning frame; 3. lower positioning block; 4. lower rolling wheel; 5. threaded rod; 6. upper positioning block; 7. upper rolling wheel; 8. gas waterfall blowing assembly; 81. mounting plate; 82. supporting plate; 83. guide plate; 84. filter screen; 85. circular ring; 86. metal bellows; 87. conical head; 88. guide cover; 89. positioning ring; 810. barrier strip; 811. triangle plate; 812. arc plate; 9. synchronous single control adjustment assembly; 91. moving plate; 92. inner serrated pulley; 93. inner serrated belt; 94. rotating block; 95. spring rod; 96. moving seat; 97. extrusion wheel; 98. cylinder; 99. rectangular rod; 910. disc; 911. plug-in column; 10. chain transmission structure. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0032] Embodiment 1: The present invention provides a hot-rolled ribbed steel bar production process, such as Figures 1 to 9 As shown, the following steps are included:

[0033] S1: Raw material preparation: Select suitable steel billet, usually low alloy high strength steel, and heat it to an appropriate temperature (about 1100-1250℃) for subsequent rolling.

[0034] S2: Hot rolling: The heated billet is initially rolled through a primary rolling mill to form a rough billet, which is then further rolled to gradually reduce its cross-section to form the basic shape of the ribbed steel bar. It then enters multiple rolling mills for finish rolling to ensure that the size and shape of the steel bar meet the standards.

[0035] S3: Cooling: Cool the steel bars after rolling. There are two cooling methods: natural cooling in the air, and the cooling speed needs to be controlled to avoid internal stress;

[0036] Water cooling: to speed up the cooling rate and increase the strength of the steel bars.

[0037] S4: Cutting: Cut the cooled steel bars into required lengths, usually using a cutting machine for precise cutting.

[0038] The rolling unit in step S2 includes a frame 1, three positioning frames 2 are welded at equal distances on the top of the frame 1, lower positioning blocks 3 are symmetrically fixedly installed inside the three positioning frames 2, and lower rolling wheels 4 are rotatably connected inside the lower positioning blocks 3, threaded rods 5 are symmetrically connected to the tops of the inner walls of the three positioning frames 2 through threads, upper positioning blocks 6 slidably connected to the positioning frames 2 are sleeved on the outer sides of the threaded rods 5, and the threaded rods 5 are connected to the inside of the positioning frames 2 through threads to drive the threaded rods 5 to rise and fall inside the positioning frames 2, and upper rolling wheels 7 are rotatably connected inside the upper rolling wheels 7, and chain transmission structures 10 are connected between the three lower rolling wheels 4;

[0039] A gas waterfall blowing assembly 8 is fixedly installed on the outer side of the lower rolling wheel 4 and the upper rolling wheel 7. The gas waterfall blowing assembly 8 includes a circular ring 85 fixedly installed on the outer side of the lower rolling wheel 4 and the upper rolling wheel 7. A support plate 82 is welded to one end of the circular ring 85. The inner wall of the support plate 82 is provided with guide holes equidistantly arranged for gas diversion. A mounting plate 81 is welded to the inner wall of the support plate 82. A guide plate 83 is welded to one end of the support plate 82 at equidistant intervals. A filter screen 84 is clamped and installed on the outer side of the mounting plate 81 and the support plate 82. Metal bellows 86 are embedded and installed equidistantly inside the circular ring 85.

[0040] like Figure 3 , Figure 4 and Figure 6 As shown, a conical head 87 is fixedly installed at one end of the metal bellows 86, and a flow guide cover 88 is fixedly installed at one end of the conical head 87, which can facilitate the flow of gas, realize the fluidity of gas, and change the blowing range of gas.

[0041] like Figure 5 , Figure 5 , Figure 6 and Figure 7 As shown, the circular ring 85 of the lower rolling wheel 4 and the upper rolling wheel 7 are both rotatably connected with a blocking strip 810, and the interior of the blocking strip 810 is penetrated by a circular positioning ring 89, which is used to block one end of the metal bellows 86 so that part of the gas can flow along the inside of the metal bellows 86, and a triangular plate 811 is welded to the bottom end of the inner wall of the blocking strip 810 of the lower rolling wheel 4, and an arc plate 812 is welded to the bottom end of the inner wall of the blocking strip 810 of the upper rolling wheel 7, which can block the bottom end of the inner wall of the circular ring 85 of the lower rolling wheel 4 so that the gas flows upward, and the blocking strips 810 of the lower rolling wheel 4 and the upper rolling wheel 7 are both arc-shaped, and the notches of the blocking strips 810 of the lower rolling wheel 4 and the upper rolling wheel 7 are arranged in opposite directions, which can block the top of the inner wall of the circular ring 85 of the lower rolling wheel 4 so that the gas flows downward.

[0042] like Figure 2 and Figure 8As shown, a synchronous single-control adjustment component 9 is fixedly installed on the top of the threaded rod 5. The synchronous single-control adjustment component 9 includes a moving plate 91 rotatably installed on the top of the threaded rod 5, and the moving plate 91 is slidably connected to the inside of the positioning frame 2. An inner serrated pulley 92 is fixedly installed on the outer side of the threaded rod 5 at the top position of the moving plate 91, and an inner serrated belt 93 is sleeved between the two inner serrated pulleys 92. A cylinder 98 is rotatably connected to the middle part of the inner wall of the moving plate 91, and a rotating block 94 is welded on the top of the cylinder 98. Spring rods 95 are symmetrically clamped and installed on both sides of the rotating block 94, and a moving seat 96 is clamped and installed at one end of the spring rod 95. An extrusion wheel 97 is rotatably connected inside the moving seat 96, which can be used for the synchronous rotation of the two threaded rods 5, thereby changing the difficulty of the synchronous rotation of the two threaded rods 5, thereby ensuring that the two upper positioning blocks 6 can move synchronously.

[0043] like Figure 2 and Fig. 9 As shown, a rectangular rod 99 is slidably connected inside the cylinder 98, a disc 910 is welded to the bottom end of the rectangular rod 99, a plug-in column 911 is welded to the top end of the disc 910, and a circular hole is opened at the bottom end of the inner wall of the positioning frame 2 corresponding to the top end of the plug-in column 911. The number of circular holes is set to multiple, and the multiple circular holes are arranged in a circular array with the center point of the cylinder 98 as a reference, which can be used to fix the rotating block 94, changing the difficulty of fixing the two rotating blocks 94, so that the inner serrated belt 93 and the inner serrated pulley 92 are in a loose state, and the two inner serrated pulleys 92 cannot rotate synchronously.

[0044] Working principle: During the actual use of the device, the personnel pulls the plug-in column 911, and the plug-in column 911 drives the disc 910 to descend, and at this time drives the rectangular rod 99 to rise and fall inside the cylinder 98, and then the personnel rotates the disc 910, and the rotation of the disc 910 drives the rotating block 94 to rotate, and the rotation of the rotating block 94 drives the extrusion wheel 97 and the inner side of the inner serrated belt 93 to fit together, and at this time, the tension of the spring rod 95 drives the inner serrated belt 93 to deform, so that the inner serrated belt 93 and the inner serrated belt pulley 92 are squeezed and fixed, and then the rectangular rod 99 is recovered, so that the plug-in column 911 enters the corresponding circular hole, and then the personnel rotates the threaded rod 5, and the threaded rod 5 rotates and moves along the inside of the positioning frame 2 when it rotates. Since the threaded rod 5 drives the moving plate 91 to move when it moves, the moving plate 91 drives the synchronous single-control adjustment component 9 to rise and fall, and synchronously drives the upper positioning block 6 to rise and fall synchronously, thereby driving the upper rolling wheel 7 to rise and fall, which changes the method of requiring two personnel to synchronously rotate the threaded rod 5 in the prior art. This mechanism can The two threaded rods 5 can be made to rotate synchronously by one person, and in this process, the method in the prior art in which the two threaded rods 5 rotate synchronously due to mechanical vibration, thereby changing the position of the upper rolling wheel 7, can be changed. This method can make the two threaded rods 5 rotate synchronously when the upper rolling wheel 7 is lifted and lowered, and when the upper rolling wheel 7 is fixed, the two threaded rods 5 are separated, thereby effectively ensuring the stability of the upper rolling wheel 7 during use. The synchronous rotation of the threaded rods 5 can be achieved by a single person, so that the operation process is greatly simplified, the manpower demand and workload are reduced, it is suitable for different operating environments and manpower configurations, and the work efficiency is improved. It also avoids the synchronous rotation deviation of the threaded rods 5 caused by vibration when using traditional mechanical structures, thereby causing the position of the upper rolling wheel 7 to change, thereby ensuring the precise adjustment of the upper rolling wheel 7 during the lifting process, improving the stability of product quality, and reducing the influence of equipment vibration on the position of the upper rolling wheel 7, reducing positioning deviation, and improving processing accuracy.

[0045] Then the personnel starts the chain transmission structure 10. When the chain transmission structure 10 is running, it drives multiple lower rolling wheels 4 to rotate synchronously. When the lower rolling wheel 4 rotates, the external gas is filtered through the filter screen 84 under the action of the guide plate 83. The filtered gas enters the guide hole between the support plate 82 and the mounting plate 81, and enters the ring 85 along the guide hole. At this time, due to the factor of gravity, since the gravity of the triangular plate 811 plus the barrier strip 810 is greater than the top gravity, the barrier strip 810 is always in a rotating state, and the triangular plate 811 is kept vertical to the ground, so that the gas inside the ring 85 of the lower rolling wheel 4 can only be discharged from the top, while the arc plate inside the upper rolling wheel 7 812 and the barrier strip 810 have the same principle as the lower rolling wheel 4. At this time, the gas inside the ring 85 of the upper rolling wheel 7 can only be discharged from the bottom end, and the discharged gas enters the top and bottom ends of the hot-rolled steel bars along the metal bellows 86, the conical head 87 and the guide cover 88, thereby forming two horizontal gas waterfalls. The gas waterfalls can reduce the entry of external foreign matter (such as dust, metal chips, etc.) into the rolling area, effectively protect the surface of the strip, improve the surface finish and uniformity of the strip, and prevent dust and other tiny particles from directly contacting the equipment, reducing the wear on mechanical parts, thereby extending the service life of the equipment, reducing the maintenance frequency and cost, and helping to reduce the temperature in the rolling area to prevent the equipment from overheating.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. A hot-rolled ribbed steel bar production process, characterized in that: The following steps are involved: S1: Raw material preparation: select suitable steel billet and heat it; S2: Hot rolling: The heated steel billet is initially rolled through a preliminary rolling mill to form a rough billet, and then enters multiple rolling mills for finishing rolling; S3: Cooling: Cooling the rolled steel bars; S4: Cutting: Cut the cooled steel bars into required lengths.

2. A hot-rolled ribbed steel bar production process according to claim 1, characterized in that: The rolling mill unit in step S2 comprises a frame (1), three positioning frames (2) are welded at equal distances at the top of the frame (1), lower positioning blocks (3) are symmetrically fixedly installed inside the three positioning frames (2), lower rolling wheels (4) are rotatably connected inside the lower positioning blocks (3), threaded rods (5) are symmetrically connected to the tops of the inner walls of the three positioning frames (2) through threads, upper positioning blocks (6) are sleeved on the outer sides of the threaded rods (5) and are slidably connected to the positioning frames (2), upper rolling wheels (7) are rotatably connected inside the upper rolling wheels (7), and chain transmission structures (10) are connected between the three lower rolling wheels (4); A gas waterfall blowing assembly (8) is fixedly mounted on the outer sides of the lower rolling wheel (4) and the upper rolling wheel (7). The gas waterfall blowing assembly (8) comprises a circular ring (85) fixedly mounted on the outer sides of the lower rolling wheel (4) and the upper rolling wheel (7). A support plate (82) is welded to one end of the circular ring (85). A mounting plate (81) is welded to the inner wall of the support plate (82). A guide plate (83) is welded to one end of the support plate (82) at equal distances. A filter screen (84) is clamped and mounted on the outer sides of the mounting plate (81) and the support plate (82). Metal bellows (86) are embedded and mounted at equal distances inside the circular ring (85).

3. A hot-rolled ribbed steel bar production process according to claim 2, characterized in that: A conical head (87) is fixedly mounted on one end of the metal bellows (86), and a flow guide cover (88) is fixedly mounted on one end of the conical head (87).

4. A hot-rolled ribbed steel bar production process according to claim 2, characterized in that: The inner parts of the circular rings (85) of the lower rolling wheel (4) and the upper rolling wheel (7) are both rotatably connected with barrier strips (810), and the inner parts of the barrier strips (810) are connected with circular positioning rings (89) passing through them.

5. A hot-rolled ribbed steel bar production process according to claim 2, characterized in that: A triangular plate (811) is welded to the bottom end of the inner wall of the barrier strip (810) located on the lower rolling wheel (4), and an arc-shaped plate (812) is welded to the bottom end of the inner wall of the barrier strip (810) located on the upper rolling wheel (7).

6. A hot-rolled ribbed steel bar production process according to claim 2, characterized in that: The barrier strips (810) of the lower rolling wheel (4) and the upper rolling wheel (7) are both arc-shaped, and the notches of the barrier strips (810) of the lower rolling wheel (4) and the upper rolling wheel (7) are arranged in opposite directions.

7. A hot-rolled ribbed steel bar production process according to claim 2, characterized in that: A synchronous single-control adjustment component (9) is fixedly installed at the top of the threaded rod (5), and the synchronous single-control adjustment component (9) comprises a moving plate (91) rotatably installed at the top of the threaded rod (5), and the moving plate (91) is slidably connected to the inside of the positioning frame (2); an inner sawtooth pulley (92) is fixedly installed at the top of the moving plate (91) on the outside of the threaded rod (5), and an inner sawtooth belt (93) is sleeved between the two inner sawtooth pulleys (92); a cylinder (98) is rotatably connected to the middle of the inner wall of the moving plate (91); a rotating block (94) is welded to the top of the cylinder (98); spring rods (95) are symmetrically clamped and installed on both sides of the rotating block (94); a moving seat (96) is clamped and installed at one end of the spring rod (95); and an extrusion wheel (97) is rotatably connected to the inside of the moving seat (96).

8. A hot-rolled ribbed steel bar production process according to claim 8, characterized in that: A rectangular rod (99) is slidably connected inside the cylinder (98), a disc (910) is welded to the bottom end of the rectangular rod (99), and a plug-in column (911) is welded to the top end of the disc (910).

9. A hot-rolled ribbed steel bar production process according to claim 2, characterized in that: A circular hole is provided at the bottom end of the inner wall of the positioning frame (2) corresponding to the top end of the plug-in column (911), the number of the circular holes is set to be multiple, and the multiple circular holes are arranged in a circular array with the center point of the column (98) as a reference.

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