A device for grinding surface defects of a billet

Abstract

The utility model relates to steel material repair technical field, concretely relates to a kind of steel billet surface defect grinding device.The utility model provides a kind of steel billet surface defect grinding device, including base, gyro wheel mechanism, motor, drive shaft, transmission mechanism, grinding piece group and handrail support;The gyro wheel mechanism is installed in the first end of the base, the drive shaft is rotatably installed in the second end of the base, the axis of the drive shaft is parallel with the axis of the gyro wheel mechanism;The motor is fixedly installed in the top of the base, and the motor is rotated around its own axis by the transmission mechanism driving the drive shaft, the grinding piece group is assembled in the end of the drive shaft, and the grinding piece group is composed of multiple grinding pieces.Worker holds handrail support and carries out repair work in standing state, without worker crouching to repair, multiple abutting grinding pieces contact steel billet surface simultaneously, equivalent to widen grinding work surface.

Description

Technical Field

[0001] This utility model relates to the field of steel repair technology, specifically to a device for repairing surface defects in steel billets. Background Technology

[0002] During the continuous casting process of steel billets, problems such as uneven cooling, changes in the taper of the crystallizer, and copper plate peeling can lead to defects such as scabs, depressions, and cracks on the surface of the steel billets, with cracks being the most numerous. Steel billets with these defects need to be ground before entering the hot rolling process. If the defects are not removed, the following two problems will occur: First, since the defects cannot be eliminated by subsequent hot rolling and solution treatment, they will eventually remain on the white steel coil, resulting in a substandard product; Second, the steel billet may be rolled out as scrap steel during the rolling process, resulting in even more serious losses.

[0003] The aforementioned defects can be removed through grinding. However, edge or localized defects are difficult and costly to remove by machine. For example, if a steel billet has two knot defects, machine grinding would require grinding away the entire surface, which is not only time-consuming and costly but also reduces the yield (generally requiring the removal of 3-5mm). Manual grinding, on the other hand, only requires using an angle grinder to remove the two knots separately, thus reducing losses and increasing the yield. Therefore, manual grinding is generally preferred for corner cracks (where defects account for over 95%).

[0004] However, when manually grinding the corner cracks on the surface of a steel billet, the worker needs to squat down while holding the angle grinder to grind the stainless steel billet. It is quite tiring for the worker to squat for a long time. In addition, the existing angle grinders only have one grinding disc, which is prone to breakage. Utility Model Content

[0005] (I) The problem to be solved by this utility model is that when manually grinding the corner cracks on the surface of the steel billet, it is necessary for the worker to hold the angle grinder and squat down to grind the stainless steel billet. It is quite tiring for the worker to squat for a long time. In addition, the existing angle grinder only has one grinding disc, which is prone to breakage.

[0006] (II) Technical Solution

[0007] A steel billet surface defect repair and grinding device includes a base, a roller mechanism, a motor, a drive shaft, a transmission mechanism, a grinding disc assembly, and a handrail support.

[0008] The roller mechanism is installed at the first end of the base, and the drive shaft is rotatably installed at the second end of the base. The axis of the drive shaft is parallel to the axis of the roller mechanism. The motor is fixedly installed at the top of the base, and the motor drives the drive shaft to rotate around its own axis through the transmission mechanism. The grinding disc assembly is assembled at the end of the drive shaft, and the grinding disc assembly consists of multiple grinding discs.

[0009] The axis of the grinding disc assembly is higher than the axis of the roller mechanism; the handrail bracket is mounted on the base and is close to the second end of the base.

[0010] According to one embodiment of the present invention, a box-type switch is included, which is used to control the starting and stopping of the motor, and the box-type switch is installed on the handrail bracket.

[0011] According to one embodiment of the present invention, the handrail bracket includes a support rod, a main handrail, and a secondary handrail. The bottom end of the support rod is fixed to the second end of the base. The main handrail is installed on the top end of the support rod, and the included angle formed between the main handrail and the support rod is an obtuse angle. The secondary handrail is installed on the main handrail.

[0012] According to one embodiment of the present invention, the main handrail includes a connected crossbar and two handles. The crossbar is fixed to the top of the support rod and is perpendicular to the support rod. The two handles are respectively fixed to both ends of the crossbar.

[0013] According to one embodiment of the present invention, the auxiliary handrail includes a top rod and a plurality of connecting rods, the plurality of connecting rods being arranged and fixed on the crossbar along the axial direction of the crossbar, and the top rod being fixed between the top ends of the plurality of connecting rods.

[0014] According to one embodiment of the present invention, the handle is provided with an anti-slip structure.

[0015] According to one embodiment of the present invention, a plurality of grinding discs are arranged along the axial direction of the drive shaft.

[0016] According to one embodiment of the present invention, the distance from the motor to the first end of the base is less than the distance from the motor to the second end of the base.

[0017] According to one embodiment of the present invention, the top of the motor is provided with a box, and a counterweight is placed inside the box.

[0018] According to one embodiment of the present invention, the transmission mechanism includes two pulleys and a belt. The two pulleys are respectively fixed to the output end of the motor and the end of the drive shaft, and the belt is sleeved between the two pulleys.

[0019] The beneficial effects of this utility model are as follows: Compared with the previous method of manually repairing defects on the surface of steel billets by squatting down with a handheld angle grinder, the use of this steel billet surface defect grinding device has at least the following advantages:

[0020] First, workers can perform repairs while standing, holding onto the support frame, eliminating the need for them to squat. Second, the grinding disc assembly consists of multiple grinding discs arranged side-by-side. These adjacent discs simultaneously contact the billet surface, effectively widening the grinding working surface and significantly increasing the material removal rate per unit time. This increases the grinding area, reduces the risk of disc breakage, and improves grinding efficiency. Furthermore, the multi-disc design allows for grinding a larger area in a single pass, reducing uneven joints and textures caused by multiple, overlapping grinding operations, thus contributing to a smoother and more uniform surface finish. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A schematic diagram illustrating the use of a steel billet surface defect repair device to repair steel billets according to an embodiment of this utility model;

[0023] Figure 2 A perspective view of the steel billet surface defect repair device provided in this embodiment of the utility model;

[0024] Figure 3 A structural diagram of the steel billet surface defect grinding device provided in this embodiment of the utility model after removing the grinding disc cover;

[0025] Figure 4 The structural diagram of the drive shaft, the second pulley, and the grinding disc assembly provided in the embodiment of this utility model.

[0026] Icons: 1. Base; 101. Roller; 2. Motor; 201. Box; 3. Sleeve; 4. Drive shaft; 5. First pulley; 6. Second pulley; 7. Belt; 8. Outer cover; 9. Grinding disc assembly; 10. Grinding disc cover; 11. Support rod; 12. Main handrail; 121. Crossbar; 122. Handle; 123. Anti-slip texture; 13. Secondary handrail; 131. Connecting rod; 132. Top rod; 14. Switch box; 15. Box-type switch; 16. Counterweight; 17. Fixed sleeve; 18. Movable sleeve; 19. Locking nut. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] like Figures 1-4 As shown, one embodiment of this utility model provides a steel billet surface defect repair and grinding device, including a base 1, a roller mechanism, a motor 2, a drive shaft 4, a transmission mechanism, a grinding disc group 9, and a handrail bracket;

[0029] The roller mechanism is installed at the first end of the base 1, and the drive shaft 4 is rotatably installed at the second end of the base 1. The axis of the drive shaft 4 is parallel to the axis of the roller mechanism. The motor 2 is fixedly installed on the top of the base 1, and the motor 2 drives the drive shaft 4 to rotate around its own axis through the transmission mechanism. The grinding disc group 9 is assembled at the end of the drive shaft 4. The grinding disc group 9 is composed of multiple grinding discs.

[0030] The axis of the grinding disc assembly 9 is higher than the axis of the roller mechanism; the handrail bracket is installed on the base 1 and is close to the second end of the base 1.

[0031] In this embodiment, when using the steel billet surface defect grinding device to repair corner cracks or scabs on the surface of the steel billet, the worker pushes the grinding device to the designated place, turns on the switch, and then adjusts the position of the grinding plate group 9 by holding the handrail support so that the grinding plate group 9 is close to the defect. The worker holds the handrail support and controls the left and right directions and the downward pressure of the grinding plate group 9 through the handrail support.

[0032] Compared with the traditional method of manually repairing defects on the surface of steel billets by squatting down and using a handheld angle grinder, this steel billet surface defect grinding device has at least the following advantages:

[0033] First, workers can perform repairs while standing, holding onto the support frame, eliminating the need for them to squat. Second, the grinding disc assembly 9 consists of multiple grinding discs arranged side-by-side. These adjacent discs simultaneously contact the billet surface, effectively widening the grinding working surface and significantly increasing the material removal rate per unit time. This increases the grinding area, reduces the risk of disc breakage, and improves grinding efficiency. Furthermore, the multi-disc design allows for grinding a larger area in a single pass, reducing uneven joints and textures caused by multiple, overlapping grinding operations, thus contributing to a smoother and more uniform surface finish.

[0034] In this embodiment, a sleeve 3 is fixedly installed at the second end of the base 1, and a bearing is installed inside the sleeve 3. The drive shaft 4 is connected to the inner ring of the bearing.

[0035] In some embodiments, the roller mechanism includes a roller shaft and two rollers 101. The roller shaft is fixedly mounted on the first end of the base 1, and the two rollers 101 are rotatably mounted on both ends of the roller shaft.

[0036] In this embodiment, as Figure 1 and Figure 2 As shown, the axis of the grinding disc assembly 9 is higher than the axis of the roller 101, and the radius of the grinding disc is greater than the radius of the roller 101. Thus, when the steel billet surface defect grinding device is placed on the ground, the bottom of the grinding disc assembly 9 and the roller 101 simultaneously fall on the ground, and the grinding disc assembly 9 and the roller 101 simultaneously support the entire grinding device.

[0037] It should be noted that the motor 2 is close to the first end of the base 1. When the steel billet surface defect grinding device is placed upright, the center of gravity of the grinding device is closer to the first end of the base 1 due to the weight of the motor 2, which prevents the grinding device from tipping over to one side of the grinding disc assembly 9.

[0038] In this embodiment, the handrail bracket includes a support rod 11, a main handrail 12 and a secondary handrail 13. The bottom end of the support rod 11 is welded to the sleeve 3 at the second end of the base 1, and the support rod 11 and the sleeve 3 are also fixedly connected by bolts, thereby improving the connection strength between the support rod 11 and the sleeve 3.

[0039] Furthermore, the main handrail 12 is installed at the top of the support rod 11, the main handrail 12 points away from the motor 2, and the angle formed between the main handrail 12 and the support rod 11 is an obtuse angle, and the auxiliary handrail 13 is installed on the main handrail 12.

[0040] In some embodiments, such as Figure 2 and Figure 3 As shown, the main handrail 12 includes a connected crossbar 121 and two handles 122. The crossbar 121 is fixed to the top of the support rod 11 and is perpendicular to the support rod 11. The two handles 122 are fixed to both ends of the crossbar 121. The auxiliary handrail 13 includes a top rod 132 and multiple connecting rods 131. The multiple connecting rods 131 are arranged along the axis of the crossbar 121 and fixed to the crossbar 121. The connecting rods 131 are perpendicular to the crossbar 121. The top rod 132 is fixed between the tops of the multiple connecting rods 131. By providing two handrails, the adaptability of this grinding device is improved, so as to meet the needs of workers of different heights as much as possible. That is, taller workers can hold onto the auxiliary handrail 13, and shorter workers can hold onto the main handrail 12.

[0041] Optionally, an anti-slip structure is provided on the circumferential surface of the two handles 122 of the main armrest 12. The anti-slip structure may be an anti-slip texture 123 or an anti-slip sleeve.

[0042] Optionally, anti-slip texture 123 is provided on the circumferential surface of the top rod 132 of the secondary armrest 13.

[0043] In some embodiments, the switch of motor 2 is modified into a box switch 15, which is mounted on the handrail bracket, for example, on the top rod 132 of the secondary handrail 13, or near the top of the support rod 11. This makes it convenient for workers to operate the box switch 15 while standing.

[0044] Optional, such as Figure 1 As shown, a switch box 14 is fixedly installed on the support rod 11, and a box-type switch 15 is placed inside the switch box 14.

[0045] In some embodiments, such as Figure 2 and Figure 3 As shown, the transmission mechanism includes a first pulley 5, a second pulley 6, and a belt 7. The first pulley 5 is fixedly installed at the output end of the motor 2, the second pulley 6 is fixedly installed at the end of the drive shaft 4, and the belt 7 is sleeved between the first pulley 5 and the second pulley 6.

[0046] Optionally, two first pulleys 5, two second pulleys 6, and two belts 7 are provided. The two first pulleys 5 are fixed side-by-side to the output end of the motor 2, and the two second pulleys 6 are fixed side-by-side to the same end of the drive shaft 4. The belts 7 are fitted between the first pulleys 5 and the second pulleys 6. Using two belts 7 makes it easier to drive the drive shaft 4 to rotate, reduces the burden on the belts 7, increases the service life of the belts 7, and makes it less likely for the pulleys to disengage.

[0047] In some embodiments, in order to protect the transmission mechanism and improve safety, an outer cover 8 is fixedly installed on the base 1 by means of a connector. The outer cover 8 covers the first pulley 5, the belt 7 and the second pulley 6 inside to prevent dust from entering or to prevent personnel from accidentally touching them.

[0048] In this embodiment, as Figure 4 As shown, the outer circumferential surface of the drive shaft 4 away from the second pulley 6 is provided with threads, and the grinding disc assembly 9 is installed on the drive shaft 4 by a fastening mechanism, which includes a fixed sleeve 17, a movable sleeve 18 and a locking nut 19.

[0049] The fixed sleeve 17 is fitted onto one end of the drive shaft 4 and then welded to the outer circumferential surface of the drive shaft 4. The grinding disc assembly 9 is confined between the fixed sleeve 17 and the movable sleeve 18. The locking nut 19 is threaded onto the end of the drive shaft 4 away from the second pulley 6. By tightening the locking nut 19, the movable sleeve 18 is pushed towards the fixed sleeve 17, thereby reducing the distance between the movable sleeve 18 and the fixed sleeve 17, thus fixing the grinding disc assembly 9 between the movable sleeve 18 and the fixed sleeve 17. When replacing or grinding the disc assembly 9, simply unscrew the locking nut 19, remove the movable sleeve 18, remove the old grinding disc assembly 9 and replace it with a new one, and finally fit the movable sleeve 18 onto the drive shaft 4 and tighten the locking nut 19.

[0050] In some embodiments, a grinding disc cover 10 is installed on one side of the top of the base 1. The grinding disc cover 10 covers the outside of the grinding disc assembly 9 to prevent sparks from flying during grinding and repair.

[0051] In some embodiments, such as Figure 2 As shown, a box 201 is fixedly installed on the top of the motor 2. The top of the box 201 has an opening, and a counterweight 16 is placed inside the box 201. The counterweight 16 is a stainless steel block weighing 10kg-15kg.

[0052] It should be noted that by adding a counterweight 16 to the motor 2, the center of gravity of the grinding device is made to be further back. When the grinding device is placed upright, the center of gravity of the grinding device is further back, which can prevent the equipment from tipping over to the front side.

[0053] When using this billet surface defect grinding device to repair corner cracks or scabs on the billet surface, push the grinding machine to the designated position, then the worker starts the switch of the box-type switch 15 and adjusts the position of the grinding disc assembly 9 by holding the handrail bracket until the grinding disc assembly 9 fits the position to be repaired. Then the worker controls the handrail bracket to swing left and right (controlling the grinding width) and at the same time applies a certain downward pressure to the grinding disc assembly 9 by pulling and pressing the handrail bracket (controlling the grinding depth). After use, place the grinding machine in the designated open space until it is stable.

[0054] Since workers can operate the steel billet surface defect repair device while standing, there is no need for them to squat, thus reducing their workload. Secondly, the grinding disc group 9 consists of multiple grinding discs arranged side by side, which effectively widens the grinding working surface and significantly increases the material removal rate per unit time, thereby increasing the grinding area. Moreover, the simultaneous grinding of multiple grinding discs reduces the risk of disc breakage compared to relying on a single grinding disc, resulting in higher grinding efficiency.

[0055] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0057] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for grinding surface defects in steel billets, characterized in that, It includes a base (1), a roller mechanism, a motor (2), a drive shaft (4), a transmission mechanism, a grinding disc assembly (9), and a handrail bracket; The roller mechanism is installed at the first end of the base (1), and the drive shaft (4) is rotatably installed at the second end of the base (1). The axis of the drive shaft (4) is parallel to the axis of the roller mechanism. The motor (2) is fixedly installed on the top of the base (1), and the motor (2) drives the drive shaft (4) to rotate around its own axis through the transmission mechanism. The grinding disc assembly (9) is assembled at the end of the drive shaft (4), and the grinding disc assembly (9) is composed of multiple grinding discs. The axis of the grinding disc assembly (9) is higher than the axis of the roller mechanism; the handrail bracket is mounted on the base (1) and is close to the second end of the base (1).

2. The steel billet surface defect repair grinding device according to claim 1, characterized in that, Includes a box switch (15), which is used to control the opening and closing of the motor (2), and the box switch (15) is installed on the handrail bracket.

3. The steel billet surface defect repair grinding device according to claim 2, characterized in that, The handrail support includes a support rod (11), a main handrail (12) and a secondary handrail (13). The bottom end of the support rod (11) is fixed to the second end of the base (1). The main handrail (12) is installed on the top end of the support rod (11), and the included angle between the main handrail (12) and the support rod (11) is an obtuse angle. The secondary handrail (13) is installed on the main handrail (12).

4. The steel billet surface defect repair grinding device according to claim 3, characterized in that, The main handrail (12) includes a connected crossbar (121) and two handles (122). The crossbar (121) is fixed to the top of the support rod (11) and is perpendicular to the support rod (11). The two handles (122) are respectively fixed to the two ends of the crossbar (121).

5. The steel billet surface defect repair device according to claim 4, characterized in that, The secondary handrail (13) includes a top rod (132) and a plurality of connecting rods (131). The plurality of connecting rods (131) are arranged and fixed on the crossbar (121) along the axial direction of the crossbar (121). The top rod (132) is fixed between the top ends of the plurality of connecting rods (131).

6. The steel billet surface defect repair grinding device according to claim 4, characterized in that, The handle (122) is provided with an anti-slip structure.

7. The steel billet surface defect repair device according to claim 1, characterized in that, Multiple grinding discs are arranged along the axial direction of the drive shaft (4).

8. The steel billet surface defect repair device according to claim 1, characterized in that, The distance from the motor (2) to the first end of the base (1) is less than the distance from the motor (2) to the second end of the base (1).

9. A steel billet surface defect repair grinding device according to claim 8, characterized in that, The top of the motor (2) is provided with a box (201), and a counterweight (16) is placed inside the box (201).

10. A steel billet surface defect repair device according to claim 1, characterized in that, The transmission mechanism includes two pulleys and a belt (7). The two pulleys are fixed to the output end of the motor (2) and the end of the drive shaft (4), respectively, and the belt (7) is sleeved between the two pulleys.

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