Online saw bite coping device and process for hot-rolled section steel

Abstract

The invention belongs to the technical field of hot-rolled section steel production, and discloses a hot-rolled section steel online saw bite coping device and process capable of effectively removing saw bite burrs at the end of a rolled piece. The device comprises a grinding assembly located on an inspection rack, the grinding assembly comprises a fixed grinding device and a first lifting moving grinding device which are located on the two opposite sides of the inspection rack, the connecting line direction of the two opposite sides of the inspection rack is parallel to the axis direction of a profile steel rolled piece, and at least one lifting check block fixed to the inspection rack is arranged on the fixed grinding device and the first lifting moving grinding device. The running direction of the single steel rolled piece on the inspection rack is opposite to the coping direction of the coping assembly, so that when the single steel rolled piece runs to the position between the fixed coping device and the first lifting moving coping device, the lifting check block ascends; the profile steel rolled piece abuts against the lifting check block under the coping of the fixed coping device and the first lifting moving coping device, after coping is completed, the coping assembly stops coping, the lifting check block descends, and the profile steel rolled piece continues to move forwards to the stacking rack.

Description

Technical Field

[0001] The invention relates to the technical field of hot-rolled steel production, and in particular to an online saw-edge grinding device and process for hot-rolled steel. Background Art

[0002] With the continuous advancement of hot-rolled steel production technology and equipment, the industry has increasingly higher requirements for the dimensional accuracy and surface quality of hot-rolled steel. However, the burr problem at the end of the finished product has not been effectively solved, affecting the overall delivery quality of hot-rolled steel.

[0003] At present, the long length cutting of hot-rolled steel can be done by cold shearing or metal cold sawing. Among them, the end surface quality of cold shearing is better, and there is basically no burr, but it is only suitable for cutting small-sized angle steel. When cold shearing H-shaped steel, I-beam, channel steel and other steel, the shearing part is prone to tearing, deformation, waist collapse and other problems, which cannot meet the use requirements; although metal cold sawing is suitable for sawing various types of steel, a large number of burrs will be generated at the end of the metal cold saw during the sawing process, with a length of several millimeters to several centimeters, most of which exceed the 5mm length specified in the national standard, affecting the delivery quality. In actual production on site, for products with more burrs on the sawing edge, after offline collection, they are usually manually ground with a grinding wheel. The grinding efficiency is low, the noise and dust are large, and the environment is harsh, which also affects the automation level of the entire production line. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes an online saw-edge grinding device and process for hot-rolled steel sections, which can effectively remove saw-edge burrs at the ends of rolled pieces to improve the overall delivery quality of the products.

[0005] The hot-rolled steel online sawing edge grinding device according to the present invention comprises: a grinding assembly arranged on an inspection bench, the inspection bench is used to separate the grouped steel pieces into single pieces for inspection and then convey them to the stacking bench, the grinding assembly comprises a fixed grinding device and a first lifting and moving grinding device arranged on opposite sides of the inspection bench, the connecting direction of the opposite sides of the inspection bench is parallel to the axial direction of the steel piece, and at least one lifting block fixed on the inspection bench and located between the fixed grinding device and the first lifting and moving grinding device, the running direction of the single steel piece on the inspection bench is opposite to the grinding direction of the grinding assembly, so that when the single steel piece runs to the position between the fixed grinding device and the first lifting and moving grinding device, the lifting block rises, and the steel piece always rests on the lifting block under the joint grinding of the fixed grinding device and the first lifting and moving grinding device, and when the grinding of both ends of the single steel piece is completed, the grinding assembly stops grinding, the lifting block descends, and the steel piece continues to run forward to the stacking bench.

[0006] Furthermore, when the lifting stopper is raised, the side of the steel section rolled piece away from the stacking platform abuts against the lifting stopper.

[0007] Furthermore, the fixed grinding device and the first lifting and moving grinding device are roller brush type grinding devices, the rotation axis of the roller brush type grinding device is perpendicular to the axis direction of the steel section rolled piece, and the fixed grinding device and the first lifting and moving grinding device have opposite rotation directions.

[0008] Furthermore, the fixed grinding device and the first lifting and moving grinding device are plane brush type grinding devices, the rotation axis of the plane brush type grinding device is parallel to the axis direction of the steel section rolled piece, and the fixed grinding device and the first lifting and moving grinding device have the same rotation direction.

[0009] Furthermore, the inspection bench includes a first inspection bench and a second inspection bench arranged in parallel, the fixed grinding device is located on a side of the first inspection bench away from the second inspection bench, the first lifting and movable grinding device is located on a side of the first inspection bench close to the second inspection bench, the grinding assembly also includes a lifting and grinding device and a second lifting and movable grinding device located on opposite sides of the second inspection bench, the lifting and grinding device is close to the first lifting and movable grinding device, and the second inspection bench is also provided with at least one lifting block located between the lifting and grinding device and the second lifting and movable grinding device.

[0010] Furthermore, when the length of the steel section running on the first inspection platform is less than the distance between the two opposite sides of the first inspection platform, the first lifting and moving grinding device is adjusted by descending, moving inward and then rising so that the length of the steel section is equal to the distance between the fixed grinding device and the first lifting and moving grinding device; when the length of the steel section running on the second inspection platform is less than the distance between the two opposite sides of the second inspection platform, the second lifting and moving grinding device is adjusted by descending, moving inward and then rising so that the length of the steel section is equal to the distance between the lifting and grinding device and the second lifting and moving grinding device; when the length of the steel section running on the first inspection platform is greater than the distance between the two opposite sides of the first inspection platform, the first lifting and moving grinding device and the lifting and grinding device descend, and the second lifting and moving grinding device is adjusted by descending, moving inward and then rising so that the length of the steel section is equal to the vertical distance between the fixed grinding device and the second lifting and moving grinding device.

[0011] Furthermore, the fixed grinding device and the first lifting and moving grinding device are arranged on the same horizontal line; the lifting and moving grinding device and the second lifting and moving grinding device are arranged on the same horizontal line, and the connecting line between the fixed grinding device and the first lifting and moving grinding device and the connecting line between the lifting and moving grinding device and the second lifting and moving grinding device are set to be parallel and non-collinear.

[0012] Furthermore, the lifting grinding device and the second lifting and moving grinding device are roller brush type grinding devices, the lifting grinding device and the second lifting and moving grinding device have opposite rotation directions, and the fixed grinding device and the second lifting and moving grinding device have opposite rotation directions.

[0013] Furthermore, the fixed grinding device, the first lifting and moving grinding device, the lifting and moving grinding device and the second lifting and moving grinding device are all provided with dust removal and sound insulation covers and collection baskets for collecting burrs produced by grinding.

[0014] According to the online sawing edge grinding process for hot-rolled steel sections of the present invention, the above-mentioned online sawing edge grinding device for hot-rolled steel sections is used to grind the steel sections, and the inspection stand and the stacking stand are arranged in a connected or separated manner, and are characterized in that the following steps are included: the grouped steel sections are transported to the input end of the inspection stand by an input roller; the grouped steel sections at the input end are transported to the steel dividing inspection chain of the inspection stand by a lifting and transporting chain, and the grouped steel sections are divided into single sections by the speed difference between the lifting and transporting chain and the steel dividing inspection chain; the steel dividing inspection chain drives the single steel sections to move forward on the inspection stand, and when the single section moves to exceed the lifting and blocking block, the lifting and blocking block is raised, and the grinding assembly is used to grind the two ends of the steel sections at the same time, and the grinding assembly stops grinding after the grinding is completed, the lifting and blocking block is lowered, and the steel sections continue to move forward to the stacking stand.

[0015] The hot-rolled steel online saw-edge grinding device and process of the present invention utilize the relative movement between the grinding assembly and the steel rolled piece to achieve the purpose of effectively and automatically removing the saw-edge burrs at both ends of the steel rolled piece. This method replaces the manual offline grinding of the steel rolled piece, thereby improving the overall delivery quality of the product. At the same time, the hot-rolled steel online saw-edge grinding device of the embodiment of the present invention is suitable for online end grinding of various hot-rolled steels, including angle steels, H-shaped steels, channel steels, I-shaped steels, etc. According to different product specifications and outputs, the number of stacking racks and online grinding devices can be increased or decreased accordingly to improve the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of an online saw-edge grinding device for hot-rolled steel according to a first embodiment of the present invention;

[0017] Figure 2 It is a schematic structural diagram of an online saw-edge grinding device for hot-rolled steel according to a second embodiment of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of a fixed grinding device and a first lifting and moving grinding device. DETAILED DESCRIPTION

[0019] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0020] Figure 1 The structure of the online saw edge grinding device for hot-rolled steel according to an embodiment of the present invention is shown. Figure 1 As shown, the hot-rolled steel section online saw edge grinding device may include: a grinding assembly 4 arranged on an inspection stand 3, the inspection stand 3 is used to separate the grouped steel section rolled pieces into individual pieces for inspection and then transport them to a stacking stand 5, Figure 1 Two inspection platforms 3 are arranged in parallel. Taking the inspection platform 3 on the left as an example, the grinding assembly 4 may include a fixed grinding device 41 and a first lifting and moving grinding device 42 arranged on opposite sides of the inspection platform 3. The connecting direction of the opposite sides of the inspection platform 3 is parallel to the axial direction of the steel rolled piece 8, and at least one lifting block 34 (preferably as shown in FIG. Figure 1 The single steel rolled piece 8 is arranged in rows with intervals as shown in the figure. The running direction of the single steel rolled piece 8 on the inspection stand 3 is opposite to the grinding direction of the grinding assembly 4, so that when the single steel rolled piece 8 runs to the position between the fixed grinding device 41 and the first lifting and moving grinding device 42, the lifting stopper 34 rises, and the steel rolled piece 8 always rests on the lifting stopper 34 under the joint grinding of the fixed grinding device 41 and the first lifting and moving grinding device 42. When the grinding of both ends of the single steel rolled piece 8 is completed, the grinding assembly 4 stops grinding, the lifting stopper 34 descends, and the steel rolled piece 8 continues to run forward to the stacking stand 5.

[0021] It should be noted that the hot-rolled steel online saw edge grinding device according to the embodiment of the present invention is suitable for Figure 1 The scene shown in which the inspection stand 3 and the stacking stand 5 are arranged in one piece is also applicable to Figure 2 In the scene shown in which the inspection stand 3 and the stacking stand 5 are arranged separately, the grinding components 4 are all arranged at the structure having the function of the inspection stand (i.e., dividing the grouped steel rolled pieces into individual pieces).

[0022] Preferably, the grinding assemblies 4 are arranged on both sides of the end section of the inspection stand 3 .

[0023] The online sawing edge grinding device for hot-rolled steel in the embodiment of the present invention arranges a fixed grinding device 41 and a first lifting and movable grinding device 42 on opposite sides of the inspection bench 3. The fixed grinding device 41 can remain fixed, and the first lifting and movable grinding device 42 can be moved and adjusted according to the different lengths of the steel rolled piece 8, so that both ends of the steel rolled piece 8 can be simultaneously ground and burred by the fixed grinding device 41 and the first lifting and movable grinding device 42. At the same time, a lifting stopper 34 is arranged on the inspection bench 3, and the running direction of the steel rolled piece 8 on the inspection bench 3 is opposite to the grinding direction of the grinding assembly 4, so that the steel rolled piece 8 can always be against the lifting stopper 34 under the joint grinding of the fixed grinding device 41 and the first lifting and movable grinding device 42, thereby preventing the steel rolled piece 8 from moving during the grinding process.

[0024] The online saw-edge grinding device for hot-rolled steel in the embodiment of the present invention utilizes the relative movement between the grinding assembly 4 and the steel rolled piece 8 to achieve the purpose of effectively and automatically removing the saw-edge burrs at both ends of the steel rolled piece 8. This method replaces the manual offline grinding of the steel rolled piece 8, thereby improving the overall delivery quality of the product. At the same time, the online saw-edge grinding device for hot-rolled steel in the embodiment of the present invention is suitable for online end grinding of various types of hot-rolled steel, including angle steel, H-shaped steel, channel steel, I-shaped steel, etc. According to different product specifications and output, the number of stacking racks and online grinding devices can be increased or decreased accordingly to improve the grinding efficiency.

[0025] In such Figure 1 In the preferred embodiment shown, when the lifting block 34 is raised, the side of the steel section rolled piece 8 away from the stacking platform 5 abuts against the lifting block 34. In this embodiment, since the saw cut burrs at both ends of the steel section rolled piece 8 are mainly formed on the side close to the stacking platform 5 at both ends, when grinding the two ends, the grinding assembly 4 should first grind the saw cut burrs on the side close to the stacking platform 5, so that the two ends of the steel section rolled piece 8 can be ground more efficiently.

[0026] Preferably, the lifting block 34 can be lifted hydraulically or pneumatically.

[0027] According to the present invention, in Figure 1In the preferred embodiment shown, the fixed grinding device 41 and the first lifting and moving grinding device 42 can be roller brush type grinding devices, the rotation axis of the roller brush type grinding device is perpendicular to the axis direction of the steel section rolling piece 8, and the fixed grinding device 41 and the first lifting and moving grinding device 42 rotate in opposite directions. In this embodiment, the fixed grinding device 41 and the first lifting and moving grinding device 42 rotate in opposite directions to ensure that the steel section rolling piece 8 always rests on the lifting block 34 under the joint grinding of the fixed grinding device 41 and the first lifting and moving grinding device 42, which can effectively prevent the steel section rolling piece 8 from moving during the grinding process. In addition, the fixed grinding device 41 and the first lifting and moving grinding device 42 can also use other grinding devices such as grinding wheels.

[0028] Furthermore, in Figure 3 In the preferred embodiment shown, the fixed grinding device 41 may include a fixed bracket 411 connected to a fixed base (which may be the ground or an inspection bench) and a first fixed frame 412 connected to the fixed bracket 411, a first grinding roller 413 is rotatably connected in the first fixed frame 412, the first grinding roller 413 rotates under the drive of a first driving motor 414, and the bottom of the first fixed frame 412 is also connected to a first collecting pipe 416 for collecting burrs ground off, and the outlet of the first collecting pipe 416 is opposite to the first collecting basket 514 located therebelow.

[0029] Preferably, a fan may be provided in the first collecting pipe 416 , and the burrs ground off one side of the steel rolled piece 8 by the first grinding roller 413 are sucked into the first collecting pipe 416 and stored in the first collecting basket 415 under the action of the fan.

[0030] Also preferably, the first fixed frame 412 can be configured as a U-shaped structure, which on the one hand helps to reduce the splashing of burrs generated during the grinding process, and on the other hand can effectively reduce the noise generated during the grinding process.

[0031] In another preferred embodiment, the fixed grinding device 41 and the first lifting and moving grinding device 42 are plane brush type grinding devices, the rotation axis of the plane brush type grinding device is parallel to the axis direction of the steel section rolling piece 8, and the fixed grinding device 41 and the first lifting and moving grinding device 42 have the same rotation direction. In this embodiment, the fixed grinding device 41 and the first lifting and moving grinding device 42 have the same rotation direction to ensure that the steel section rolling piece 8 always rests on the lifting block 34 under the joint grinding of the fixed grinding device 41 and the first lifting and moving grinding device 42, which can effectively prevent the steel section rolling piece 8 from moving during the grinding process.

[0032] Furthermore, in Figure 3In the preferred embodiment shown, the first lifting and moving grinding device 42 may include a lifting bracket 441 connected to a fixed base (which may be the ground or an inspection platform) and a second fixed frame 442 connected to the lifting bracket 441. A second grinding roller 443 is rotatably connected in the second fixed frame 442. The second grinding roller 443 rotates under the drive of a second driving motor 444. The bottom of the second fixed frame 442 is also connected to a second collecting pipe 445 for collecting the burrs after grinding. The outlet of the second collecting pipe 445 is opposite to the second collecting basket 446 located below it. The lifting bracket 441 can move laterally along the track 9 to meet the grinding requirements of steel rolled pieces of different lengths. The lifting bracket 441 preferably adopts a hydraulic lifting type.

[0033] Preferably, a fan may be provided in the second collecting pipe 445 , and the burrs ground off one side of the steel rolled piece 8 by the second grinding roller 443 are sucked into the second collecting pipe 445 under the action of the fan and stored in the second collecting basket 446 .

[0034] Also preferably, the second fixed frame 442 may also be configured as a U-shaped structure, which on the one hand helps to reduce the splashing of burrs generated during the grinding process, and on the other hand can effectively reduce the noise generated during the grinding process.

[0035] Also preferably, the first collecting pipe 416 and the second collecting pipe 445 can both be configured as retractable pipes so that they can better correspond to the corresponding collecting baskets to better collect burrs.

[0036] According to the present invention, in Figure 1 In the preferred embodiment shown, the inspection platform 3 may include a first inspection platform 31 and a second inspection platform 32 arranged in parallel, a fixed grinding device 41 is located on a side of the first inspection platform 31 away from the second inspection platform 32, a first lifting and moving grinding device 42 is located on a side of the first inspection platform 31 close to the second inspection platform 32, and the grinding assembly 4 may also include a lifting and grinding device 43 and a second lifting and moving grinding device 44 located on opposite sides of the second inspection platform 32, the lifting and grinding device 43 is close to the first lifting and moving grinding device 42, and the second inspection platform 32 is also provided with at least one lifting stopper 34 located between the lifting and grinding device 43 and the second lifting and moving grinding device 44. The arrangement of this embodiment can realize the grinding of steel rolled pieces 8 of different lengths.

[0037] Specifically, when the length of the steel-shaped rolled piece 8 running on the first inspection platform 31 is less than the distance between the two opposite sides of the first inspection platform 31, the first lifting and moving grinding device 42 is adjusted by descending, moving inward and then rising so that the length of the steel-shaped rolled piece 8 is equal to the distance between the fixed grinding device 41 and the first lifting and moving grinding device 42; when the length of the steel-shaped rolled piece 8 running on the second inspection platform 32 is less than the distance between the two opposite sides of the second inspection platform 32, the second lifting and moving grinding device 44 is adjusted by descending, moving inward and then rising so that the length of the steel-shaped rolled piece 8 is equal to the distance between the lifting and grinding device 43 and the second lifting and moving grinding device 44; when the length of the steel-shaped rolled piece 8 running on the first inspection platform 31 is greater than the distance between the two opposite sides of the first inspection platform 31, the first lifting and moving grinding device 42 and the lifting and grinding device 43 descend, and the second lifting and moving grinding device 44 is adjusted by descending, moving inward and then rising so that the length of the steel-shaped rolled piece 8 is equal to the vertical distance between the fixed grinding device 41 and the second lifting and moving grinding device 44.

[0038] In a preferred embodiment, the fixed grinding device 41 and the first lifting and moving grinding device 42 are arranged on the same horizontal line, the lifting and moving grinding device 43 and the second lifting and moving grinding device 44 are arranged on the same horizontal line, and the connecting line between the fixed grinding device 41 and the first lifting and moving grinding device 42 and the connecting line between the lifting and moving grinding device 43 and the second lifting and moving grinding device 44 are set to be parallel and non-collinear.

[0039] Through the arrangement of this embodiment, when the length of the steel rolled piece 8 running on the first inspection platform 31 is greater than the distance between the two opposite sides of the first inspection platform 31, the first lifting and movable grinding device 42 and the lifting and movable grinding device 43 both descend, and at this time, the fixed grinding device 41 and the second lifting and movable grinding device 44 are not on the same horizontal line. In this case, the two ends of the steel rolled piece 8 are respectively and successively ground by the fixed grinding device 41 and the second lifting and movable grinding device 44; and when the length of the steel rolled piece 8 running on the first inspection platform 31 is less than the distance between the two opposite sides of the first inspection platform 31, and the length of the steel rolled piece 8 running on the second inspection platform 32 is less than the distance between the two opposite sides of the second inspection platform 32, in this case, the first inspection platform 31 and the second inspection platform 32 can each independently realize the grinding function.

[0040] According to the present invention, the lifting grinding device 43 and the second lifting and moving grinding device 44 are also preferably roller brush type grinding devices, the lifting grinding device 43 and the second lifting and moving grinding device 44 rotate in opposite directions, and the fixed grinding device 41 and the second lifting and moving grinding device 44 rotate in opposite directions. Figure 3As shown, the structure of the second lifting and moving grinding device 44 can be the same as that of the first lifting and moving grinding device 42, and the structure of the lifting and grinding device 43 is obtained by replacing the fixed bracket 411 of the fixed grinding device 41 with the lifting bracket 441 in the first lifting and moving grinding device 42. In addition, the lifting and grinding device 43 and the second lifting and moving grinding device 44 can also adopt other grinding devices such as flat brush grinding devices or grinding wheels.

[0041] According to the present invention, the fixed grinding device 41, the first lifting and movable grinding device 42, the lifting and movable grinding device 43 and the second lifting and movable grinding device 44 can all be provided with a dust removal and sound insulation cover (preferably a U-shaped structure formed by the aforementioned fixed frame 412) and a collection basket for collecting burrs produced by grinding.

[0042] In addition, the present invention also proposes a hot-rolled steel section online sawing edge grinding process, using the above-mentioned hot-rolled steel section online sawing edge grinding device to grind the steel section rolled piece 8, Figure 1 In the preferred embodiment shown, the inspection stand 3 and the stacking stand 5 are arranged in a connected manner, and the direction of the arrow in the figure shows the movement direction of the steel rolled piece 8. The first inspection stand 31 and the second inspection stand 32 are both suitable for steel rolled pieces with a length of 12 m. During production, the following steps may be included: the grouped steel rolled pieces after sawing are transported to the input end of the inspection stand 3 through the input roller 1. For steel rolled pieces of 12 m and below, the first group of steel rolled pieces is parked at the end of the input roller 1 by the fixed baffle 11, and the second group of steel rolled pieces is parked in the middle of the input roller 1 by the lifting baffle 12; for steel rolled pieces above 12 m, the lowering baffle 12 is lowered and parked at the end of the input roller 1 by the fixed baffle 11.

[0043] After the rolled steel pieces stop, the lifting and transporting chain 2 is raised to a high position, and the rolled steel pieces are transported in the direction of the stacking platform 5. At the junction with the steel-dividing inspection chain 33, the grouped rolled steel pieces are divided into single pieces by the speed difference between the two sections of the chain. The rolled steel pieces can be inspected manually or automatically here. After the inspection, the steel-dividing inspection chain 33 continues to transport the single steel pieces forward. The lifting and transporting chain 2 can be a chain transport device, which can be lifted by a hydraulic cylinder and moved horizontally by a motor. The steel-dividing inspection chain 33 can be moved horizontally by a motor-driven chain.

[0044] When the rolled steel piece is transported to the end of the steel inspection chain 33, the lifting block 34 rises to a high position. At this time, the end face of the rolled steel piece contacts the grinding devices rotating on both sides. The burrs on the end are removed through the relative movement of the grinding device 4 and the rolled steel piece 8. After the end grinding is completed, the grinding device stops grinding, the lifting block 34 drops to a low position, and the rolled steel piece 8 continues to be transported forward to the stacking chain of the stacking stand 5, and the automatic stacker 6 completes the stacking, and then it is transported to the subsequent equipment through the output roller 7.

[0045] like Figure 2In the preferred embodiment shown in the figure, the inspection stand 3 and the stacking stand 5 are arranged separately. The arrow direction in the figure shows the movement direction of the steel rolled piece 8. The grinding process and principle on the inspection stand 3 in this embodiment are the same as those in the embodiment shown in the figure. Figure 1 The grinding process and principle of the illustrated embodiment are the same and will not be described in detail here.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A device for grinding the saw edge of hot-rolled steel on the line, characterized in that: include: A grinding assembly is arranged on an inspection bench, the inspection bench is used to separate the grouped steel rolled pieces into single pieces for inspection and then transport them to a stacking bench, the grinding assembly includes a fixed grinding device and a first lifting and moving grinding device arranged on opposite sides of the inspection bench, the connecting direction of the opposite sides of the inspection bench is parallel to the axial direction of the steel rolled piece, and at least one lifting block fixed on the inspection bench and located between the fixed grinding device and the first lifting and moving grinding device, the running direction of the single steel rolled piece on the inspection bench is opposite to the grinding direction of the grinding assembly, so that when the single steel rolled piece runs to the position between the fixed grinding device and the first lifting and moving grinding device, the lifting block rises, and the steel rolled piece always rests on the lifting block under the joint grinding of the fixed grinding device and the first lifting and moving grinding device, and when the grinding of both ends of the single steel rolled piece is completed, the grinding assembly stops grinding, the lifting block descends, and the steel rolled piece continues to run forward to the stacking bench.

2. The hot-rolled steel online saw edge grinding device according to claim 1, characterized in that: When the lifting stopper is raised, the side of the steel section rolled piece away from the stacking platform abuts against the lifting stopper.

3. The hot-rolled steel online saw edge grinding device according to claim 1 or 2, characterized in that: The fixed grinding device and the first lifting and moving grinding device are roller brush type grinding devices, the rotation axis of the roller brush type grinding device is perpendicular to the axis direction of the steel section rolled piece, and the fixed grinding device and the first lifting and moving grinding device have opposite rotation directions.

4. The hot-rolled steel online saw edge grinding device according to claim 1 or 2, characterized in that: The fixed grinding device and the first lifting and moving grinding device are flat brush grinding devices, the rotation axis of the flat brush grinding device is parallel to the axis direction of the steel rolled piece, and the fixed grinding device and the first lifting and moving grinding device have the same rotation direction.

5. The hot-rolled steel online saw edge grinding device according to claim 3, characterized in that: The inspection bench comprises a first inspection bench and a second inspection bench arranged in parallel, the fixed grinding device is located on a side of the first inspection bench away from the second inspection bench, the first lifting and moving grinding device is located on a side of the first inspection bench close to the second inspection bench, the grinding assembly further comprises a lifting and grinding device and a second lifting and moving grinding device located on opposite sides of the second inspection bench, the lifting and grinding device is close to the first lifting and moving grinding device, and the second inspection bench is further provided with at least one lifting stopper located between the lifting and grinding device and the second lifting and moving grinding device.

6. The hot-rolled steel online saw edge grinding device according to claim 5, characterized in that: When the length of the steel rolled piece running on the first inspection platform is less than the distance between the two opposite sides of the first inspection platform, the first lifting and moving grinding device is adjusted by descending, moving inward and then ascending to make the length of the steel rolled piece equal to the distance between the fixed grinding device and the first lifting and moving grinding device; When the length of the steel section running on the second inspection platform is less than the distance between the two opposite sides of the second inspection platform, the second lifting and moving grinding device is adjusted by descending, moving inward and then rising so that the length of the steel section is equal to the distance between the lifting and grinding device and the second lifting and moving grinding device; when the length of the steel section running on the first inspection platform is greater than the distance between the two opposite sides of the first inspection platform, the first lifting and grinding device and the lifting and grinding device descend, and the second lifting and moving grinding device is adjusted by descending, moving inward and then rising so that the length of the steel section is equal to the vertical distance between the fixed grinding device and the second lifting and moving grinding device.

7. The hot-rolled steel online saw edge grinding device according to claim 5, characterized in that: The fixed grinding device and the first lifting and moving grinding device are on the same horizontal line, the lifting and moving grinding device and the second lifting and moving grinding device are arranged on the same horizontal line, and the connecting line between the fixed grinding device and the first lifting and moving grinding device and the connecting line between the lifting and moving grinding device and the second lifting and moving grinding device are arranged to be parallel and non-collinear.

8. The hot-rolled steel online saw edge grinding device according to claim 5, characterized in that: The lifting grinding device and the second lifting and moving grinding device are the roller brush type grinding devices, the lifting grinding device and the second lifting and moving grinding device rotate in opposite directions, and the fixed grinding device and the second lifting and moving grinding device rotate in opposite directions.

9. The hot-rolled steel online saw edge grinding device according to claim 5, characterized in that: The fixed grinding device, the first lifting and moving grinding device, the lifting and moving grinding device and the second lifting and moving grinding device are all provided with a dust removal and sound insulation cover and a collection basket for collecting burrs produced by grinding.

10. A hot-rolled steel section online sawing and grinding process, wherein the hot-rolled steel section online sawing and grinding device according to any one of claims 1 to 8 is used to grind the steel section rolled piece, wherein the inspection stand and the stacking stand are arranged in a connected or separate manner, and characterized in that: The following steps are involved: The grouped steel rolled pieces are transported to the input end of the inspection stand through the input roller table; The grouped steel rolled pieces at the input end are transported to the steel-dividing inspection chain of the inspection stand by using the lifting and transporting chain, and the grouped steel rolled pieces are divided into individual pieces by the speed difference between the lifting and transporting chain and the steel-dividing inspection chain; The steel inspection chain drives the single steel section rolled piece to move forward on the inspection platform. When it moves beyond the lifting block, the lifting block is raised, and the grinding assembly grinds the two ends of the steel section rolled piece at the same time. After the grinding is completed, the grinding assembly stops grinding, the lifting block drops, and the steel section rolled piece continues to move forward to the stacking platform.

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