Edging device for a headless rolling blank

Abstract

The application belongs to the technical field of the endless rolling and discloses an endless rolling blank chamfering device, which comprises a pair of symmetrically arranged chamfering mechanisms on both sides of the blank rolling direction, each of the chamfering mechanisms comprises a swing arm support, a linear driving mechanism support, a linear driving mechanism fixedly connected at one end to the linear driving mechanism support, a swing arm rotatably connected at one end to the swing arm support and rotatably connected at the other end to the other end of the linear driving mechanism for switching the cutter mounted thereon between a chamfering station and a standby station, and a cutter for chamfering the edge of the blank during the movement of the blank along the rolling direction at the chamfering station. The application makes full use of the characteristics of the low deformation resistance of the blank in the high temperature state, relies on the contact between the blank and the cutter during the movement of the blank along the rolling direction to perform the chamfering operation, has a small floor space, is easy to arrange, and saves the cutter cutting driving equipment.

Description

Technical Field

[0001] This invention relates to the field of endless rolling technology, and more specifically, to a beveling device for endless rolled billets. Background Technology

[0002] In traditional hot continuous rolling production, each billet requires an independent threading-acceleration-deceleration-tailing process. This results in insufficient tension at the beginning and end of the billet, making it difficult to guarantee dimensional accuracy and shape, and the production process is discontinuous. Endless rolling technology, by welding the beginning and end of multiple billets together and then continuously feeding them into the finishing mill, effectively shortens rolling intervals, increases workshop output, improves the dimensional accuracy of finished products, and reduces production costs, making it a superior production process.

[0003] However, the endless rolling technology involves welding the billet, resulting in uneven weld edges. If left untreated, this will negatively impact the quality of the finished product during subsequent rolling processes. Currently, weld beads are removed horizontally and vertically using a weld bead removal device, such as Chinese patent CN216966411U, which removes overflowing weld beads. However, this device cannot address the edges of the billet. The edges of the billet need to be beveled before proceeding to the next process; therefore, a device is required to bevel the edges of the billet.

[0004] While chamfering machines can process edges and corners on components, they are offline finishing processes performed on final or semi-finished products. For example, chamfering, deburring, or rounding the edges of workpieces primarily relies on cutting.

[0005] The applicant discovered that the principle of machining is to utilize the hardness of the cutting tool to cause brittle fracture of the material through shearing, thereby forming chips and separating them from the workpiece. After the endless rolling welding head and tail, the billet temperature can reach 1100℃. At this temperature, the billet has good plasticity and low deformation resistance. Faced with the soft and sticky steel billet at high temperature, the cutting tool has difficulty cutting into and breaking the chips, failing to achieve the expected chamfering effect. The cut edges are rough, resulting in poor finished product quality.

[0006] To date, there is no equipment suitable for beveling after welding of headless rolled billets. Summary of the Invention

[0007] The headless rolling billet chamfering device provided in this application performs chamfering operations by moving the high-temperature billet in the rolling direction and contacting the cutting tool, thereby realizing online chamfering of high-temperature billets without production stoppage.

[0008] A chamfering device for headless rolled billets includes a pair of chamfering mechanisms symmetrically arranged on both sides of the billet rolling roller table, each chamfering mechanism comprising: Swing arm support; Linear drive mechanism support; A linear drive mechanism, one end of which is fixedly connected to a linear drive mechanism bracket; The swing arm has one end rotatably connected to the swing arm bracket, and the other end rotatably connected to the other end of the linear drive mechanism, which is used to drive the tool mounted on it to switch between the chamfering station and the standby station. A cutting tool is used to chamfer the edges of a billet during the rolling process at the chamfering station.

[0009] In one possible implementation, each swing arm is also equipped with a guide roller, and the guide roller at the chamfering station is located upstream of the cutter along the rolling direction.

[0010] In one possible implementation, the cutting tool is block-shaped, and a first stepped through groove is provided on the side of the cutting tool facing the blank. The first stepped through groove passes through the cutting tool, and the minimum width of the side opening of the first stepped through groove is equal to the side width of the blank.

[0011] In one possible implementation, a second stepped through groove is provided at the bottom of the first stepped through groove, and the second stepped through groove passes through the cutting tool.

[0012] In one possible implementation, when the swing arm swings to the chamfering station, the flanges of a pair of guide rollers are positioned at the designed width of the billet.

[0013] In one possible implementation, when the swing arm swings to the chamfering station, the first stepped through-slots of a pair of cutters enclose a channel that matches the designed chamfered size of the blank.

[0014] In one possible implementation, the second stepped through-slot is located at the bottom center of the first stepped through-slot.

[0015] In one possible implementation, the side and bottom surfaces of the first stepped through-slot are connected by a chamfered surface of a plane.

[0016] In one possible implementation, the angle formed by the side surface and the bottom surface of the first stepped through groove is an obtuse angle.

[0017] In one possible implementation, the side and bottom surfaces of the first stepped through-slot are connected by an arc-shaped chamfered surface.

[0018] The headless rolled billet beveling device of the present invention has the following beneficial effects: (1) This application makes full use of the low deformation resistance of the billet under high temperature, and relies on the billet to move along the rolling direction and contact the tool to perform chamfering operation, so as to realize online chamfering of high temperature billet without production stop.

[0019] (2) Unlike chamfering machines, this application does not require a drive device to actively drive the tool to generate cutting action. It has a small footprint, is easy to arrange, and saves on tool cutting drive equipment.

[0020] (3) In this application, when the swing arm swings and the guide rollers reach the chamfering station, the flanges of a pair of guide rollers are at the designed width position of the billet. For the moving billet, the guide rollers can first guide and straighten the position of the billet, so that the cutter can perform precise chamfering operation on the billet.

[0021] (4) The guide roller of this application is installed upstream of the rolling direction relative to the cutting tool. The guide roller can contact the billet first and guide and straighten the billet before chamfering.

[0022] (5) When the first step through groove of a pair of cutting tools is used for chamfering, the second step through groove will not come into contact with the weld bead between the edges, thus ensuring that the billet can be easily chamfered during the rolling process without being unnecessarily obstructed. Attached Figure Description

[0023] The above features and technical advantages of the present invention will become clearer and easier to understand by describing its embodiments in conjunction with the accompanying drawings.

[0024] Figure 1 This is a top view of the headless rolled billet chamfering device according to an embodiment of this application at the standby station; Figure 2 This is a top view of the headless rolled billet beveling device according to an embodiment of this application at the beveling station; Figure 3 This is a front view of the headless rolled billet beveling device according to an embodiment of this application at the beveling station; Figure 4 This is a schematic diagram of a cutting tool with only a first stepped through groove according to an embodiment of this application; Figure 5 This is a schematic diagram of a tool with only a first stepped through groove chamfering a blank according to an embodiment of this application; Figure 6 This is a schematic diagram illustrating the connection between the chamfered surface and the side and bottom surfaces of a cutting tool with only a first stepped through groove, according to an embodiment of this application. Figure 1 ; Figure 7 This is a schematic diagram illustrating the connection between the chamfered surface and the side and bottom surfaces of a cutting tool with only a first stepped through groove, according to an embodiment of this application. Figure 2 ; Figure 8 This is a schematic diagram of the arc-shaped chamfered surface of a cutting tool having only a first stepped through groove according to an embodiment of this application; Figure 9 This is a schematic diagram of a cutting tool with a first stepped through groove and a second stepped through groove according to an embodiment of this application; Figure 10 This is a schematic diagram of a cutting tool with a first stepped through groove and a second stepped through groove performing chamfering on a blank according to an embodiment of this application; Figure label: 1. Swing arm bracket, 11. First pin, 2. Linear drive mechanism bracket, 3. Linear drive mechanism, 31. Single ear plate, 4. Swing arm, 41. Second pin, 42. Double ear plate, 5. Cutting tool, 51. First stepped through groove, 51. Side surface, 511. Bottom surface, 512. Chamfered surface, 513. Second stepped through groove, 52. Guide roller, 6. Blank, 7. Detailed Implementation

[0025] Embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that the described embodiments can be modified in various ways or combinations thereof without departing from the spirit and scope of the invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in this specification, the drawings are not drawn to scale, and the same reference numerals denote the same parts.

[0026] Beveling in the endless rolling process is an online process and an integral part of the endless rolling production line. The beveling process handles intermediate products at high temperatures, while the beveling machine operation is typically an offline process, handling final products that have already been formed and cooled, such as steel plates, steel pipes, and steel structural components. It mainly processes the edges of final or semi-finished products to meet usage or appearance requirements. For example, it removes burrs and sharp edges, ensures operational safety, and processes welding bevels to prepare for subsequent butt welding of steel pipes and structural components. However, the objects being processed are final or semi-finished products at room temperature. Therefore, conventional beveling machines require relatively strong driving force to beveling components, resulting in a larger machine structure that is difficult to place around the billet rolling mill.

[0027] Furthermore, during the endless rolling process, the billet is at a high temperature of approximately 1100°C. Conventional chamfering machines are designed for processing materials at room or low temperatures, and their core components cannot withstand a high-temperature environment of 1100°C. In addition, due to the low deformation resistance of the billet, the cutting tools cannot achieve the desired chamfering effect when facing the soft and sticky steel billet at high temperatures.

[0028] The applicant considered that the billet has good plasticity and low deformation resistance at high temperatures, so it is not necessary to use cutting driving force. Instead, the billet can be chamfered by contacting the cutting tool during its movement along the rolling direction. Therefore, this application provides a billet chamfering device suitable for headless rolling.

[0029] like Figures 1 to 3As shown, the headless rolled billet chamfering device of this application includes a pair of symmetrically arranged chamfering mechanisms. Each chamfering mechanism includes a swing arm bracket 1 for rotatably connecting one end of a swing arm 4; a linear drive mechanism bracket 2 for rotatably connecting one end of a linear drive mechanism 3; the other end of the linear drive mechanism 3 is rotatably connected to the other end of the swing arm; the swing arm 4 is used to drive the cutter 5 and guide roller 6 mounted thereon to swing between the chamfering station and the standby station; the guide roller 6 is used to push the side of the billet to position and straighten the billet, ensuring that the chamfering size matches the process size of the cutter; the cutter 5 is used to scrape and chamfer the edges of the billet during the movement of the billet.

[0030] Among them, a pair of chamfering mechanisms are symmetrically arranged on both sides of the billet rolling roller table. They can chamfer the billet by means of the power during the movement of the billet. The power includes at least the traction or thrust applied by the pinch rolls, without the need to apply chamfering power separately.

[0031] The structures of the pair of swing arm brackets 1 are identical; please refer to [reference needed]. Figure 1 One swing arm support 1 is arranged on the left side of the billet rolling mill, and the other swing arm support 1 is arranged on the right side of the billet rolling mill. The two swing arm supports 1 have the same structure; one will be used as an example to illustrate its structure. The bottom of the swing arm support 1 can be fixedly connected to the ground or foundation, for example, by anchor bolts, to ensure stability. The upper end of the swing arm support 1 has a vertical first pin 11, and one end of the swing arm 4 is rotatably mounted on the swing arm support 1 via the first pin 11. Furthermore, the swing arm can be mounted on the first pin via bearings, and washers and retaining rings are provided on the first pin to limit axial movement. The specific structure is conventional technology and will not be described in detail here.

[0032] The structures of the pair of linear drive mechanism brackets 2 are identical; please refer to [reference needed]. Figure 1 One linear drive mechanism support 2 is arranged on the left side of the billet rolling direction, and the other linear drive mechanism support 2 is arranged on the right side of the billet rolling direction. The two linear drive mechanism supports 2 have the same structure; one will be used as an example to illustrate its structure. The bottom of the linear drive mechanism support 2 can be fixedly connected to the ground or foundation, for example, by anchor bolts, providing stable support for the linear drive mechanism. The linear drive mechanism support 2 can be mounted on the same foundation platform as the swing arm support 1, or they can be mounted on different foundation platforms. One end of the linear drive mechanism 3 is fixedly connected to the upper end of the linear drive mechanism support 2, which can be achieved through methods such as welding or fastener connection.

[0033] The other end of the linear drive mechanism 3 is rotatably connected to the side of the swing arm 4 facing away from the rolling mill. For example, a double-ear plate 42 can be fixedly connected to the side of the swing arm 4 facing away from the rolling mill, and a single-ear plate 31 is fixedly connected to the other end of the linear drive mechanism 3. The single-ear plate 31 has a mounting hole 43, and the double-ear plate 42 also has a mounting hole 43. The single-ear plate 31 is inserted between the double-ear plates 42. A third pin 31 passes through the mounting holes 43 of the double-ear plates 42 and the single-ear plate 31, rotatably connecting the other end of the linear drive mechanism 3 to the side of the swing arm 4 facing away from the rolling mill. Furthermore, a bearing can be installed between the third pin and the ear plate, and a cotter pin is provided at the end of the third pin to prevent it from falling off.

[0034] The linear drive mechanism 3 can be any of the following: a hydraulic cylinder, a pneumatic cylinder, or a linear push rod.

[0035] like Figure 1 , 2 As shown, when the telescopic rod of the linear drive mechanism 3 retracts, the left swing arm 4 swings clockwise away from the billet, and the right swing arm 4 swings counterclockwise away from the billet. When the telescopic rod of the linear drive mechanism 3 extends, the left swing arm 4 swings counterclockwise toward the billet, and the right swing arm swings clockwise toward the billet.

[0036] The other end of the swing arm 4 is rotatably connected to a guide roller 6 facing one side of the rolling mill. Specifically, a second pin 41 is provided at the other end of the swing arm 4. The axis of the second pin 41 is perpendicular to the rolling plane, which is the plane in which the billet moves along the rolling direction. This allows the guide roller, rotatably mounted on the second pin 41, to rotate within the rolling plane, thereby providing a guiding and straightening effect on the billet moving along the rolling direction. For example, if the rolling direction is horizontal, then the rolling plane is horizontal, and the second pin 41 is vertically positioned. The guide roller 6 is rotatably mounted on the second pin 41, thereby allowing the guide roller 6 to rotate horizontally.

[0037] This application does not exclude the possibility that the rolling direction can be other angles, such as a vertical direction, or an inclined direction at a certain angle to the horizontal plane. For example, if the rolling is in a vertical direction, the axis of the second pin 41 is horizontal, so that the guide roller mounted on the second pin 41 can rotate in the vertical plane.

[0038] The guide rollers 6 can correct the position and orientation of the billet. For example, if the billet is tilted or biased to the left, the guide rollers on both sides of the rolling direction can correct it back to the correct position. It should be noted that the position of the guide rollers is related to the displacement of the linear drive mechanism 3. By controlling the extension and retraction stroke of the linear drive mechanism 3, the guide rollers 6 can be switched between the chamfering station and the standby station. When the swing arm swings and the guide rollers 6 reach the chamfering station, the flanges of the pair of guide rollers 6 are located at the designed width position of the billet. For the moved billet, the guide rollers 6 can first guide and straighten the billet, aligning the edges of the billet with the cutting edge position of the tool.

[0039] The other end of the swing arm 4 is also fixedly connected to a cutter 5 facing the rolling mill. The cutter 5 may have a certain cutting edge, which can contact the billet during the billet movement, thereby removing the weld beads on the edges of the billet at high temperature and forming square edges. The cutter 5 may be installed on the swing arm 4 by bolts or other fasteners, so that the cutter 5 can be replaced after wear and damage.

[0040] In the chamfering station, the guide roller is located upstream of the cutting tool along the rolling direction, where upstream refers to the material feeding direction along the rolling direction. For example... Figure 2 As shown, the guide roller 6 can be installed at a position closer to the first pin 11 than the cutter 5, so that in the chamfering station, the guide roller 6 can contact the blank 7 first and guide and straighten the blank before chamfering.

[0041] In one feasible embodiment, the tool 5 is block-shaped, such as square or rectangular. Figure 4 , Figure 5 As shown, a first stepped through groove 51 is provided on the working surface side of the tool 5. The first stepped through groove 51 passes through the tool 5 and includes two side surfaces 511 and a bottom surface 512. The side surfaces and bottom surfaces of a pair of tools 5 together form a channel for chamfering the blank.

[0042] Furthermore, the angle between the side surface 511 and the bottom surface 512 is an obtuse angle. For example, in... Figure 6 In the middle, the side surface 511 forms a 5° angle with the horizontal, and the bottom surface 512 forms a 5° angle with the vertical. The angle between the side surface and the bottom surface is 100°. The side surface 511 and the bottom surface 512 are connected by a chamfered surface 513, which is an inclined plane connecting the side surface 511 and the bottom surface 512. The inclined plane 513 is parallel to the through direction of the first stepped through groove 51. The angle of the chamfered surface 513 can be set according to the required chamfer angle.

[0043] Furthermore, the minimum width of the first stepped through-slot 51 at its narrowest point is equal to the side width of the billet, so that when the cutting tool contacts the billet, it will not contact any part of the billet other than the edges. When in the chamfering station, the first stepped through-slots of a pair of cutting tools form a channel that matches the designed chamfered size of the billet. This ensures that when a pair of cutting tools chamfers the billet, the chamfered surface 513 of the first stepped through-slot 51 is slightly wider than the side width of the billet. The two sides 511 of the pair of first stepped through-slots 51 can be located outside the upper and lower surfaces of the billet, while the bottom surface 512 of the pair of first stepped through-slots 51 is located outside the two sides of the billet. Except for the chamfered surface 513, the sides and bottom surface do not contact the billet. The chamfered surface 513 can be used to chamfer the corresponding edges during the movement of the billet along the rolling direction, removing a corner of the corresponding edge of the billet to form a chamfer, for example, a 45° chamfer.

[0044] In one feasible embodiment, the tool 5 is block-shaped, such as square or rectangular. Figure 7 As shown, a first stepped through groove 51 is provided on the working surface side of the tool 5. The first stepped through groove 51 penetrates the tool 5 and includes two side surfaces 511 and a bottom surface 512, and the angle between the side surfaces 511 and the bottom surface 512 is a right angle. Moreover, the side surfaces 511 and the bottom surface 512 are connected by a chamfered surface 513. The chamfered surface 513 is an inclined plane 513 connecting the side surfaces 511 and the bottom surface 512, and the inclined plane 513 is parallel to the through direction of the first stepped through groove 51.

[0045] Furthermore, the width of the first stepped through groove 51 is greater than the width of the side surface of the billet, so that when the cutting tool contacts the billet, it will not contact the parts of the billet other than the edges. When in the chamfering station, the first stepped through grooves of a pair of cutting tools form a channel that matches the designed chamfered size of the billet. This ensures that when a pair of cutting tools chamfers the billet, the chamfered surface 513 of the first stepped through groove 51 is slightly wider than the side surface of the billet. The two side surfaces 511 of the pair of first stepped through grooves 51 can be located outside the upper and lower surfaces of the billet, while the bottom surface 512 of the pair of first stepped through grooves 51 is located outside the two side surfaces of the billet. Except for the chamfered surface 513, the side surfaces and the bottom surface do not contact the billet. The chamfered surface 513 can be used to chamfer the four edges during the movement of the billet along the rolling direction, removing a corner from the four edges of the billet to form a chamfer.

[0046] In a feasible embodiment, the chamfered surface 513 can also be a curved surface, such as... Figure 8 As shown, rounded corners can be formed on the edges, such as rounded corners.

[0047] In one feasible embodiment, such as Figure 9 , Figure 10As shown, a second stepped through-slot 52 is further provided at the bottom of the first stepped through-slot 51, and the second stepped through-slot 52 passes through the cutting tool 5. Since the chamfering operation of this application is performed on the four edges of the billet, and the weld beads in the middle area of ​​the four edges are not considered in this application, this application, by providing the second stepped through-slot 52, ensures that when the first stepped through-slot 51 of a pair of cutting tools is performing the chamfering operation, the second stepped through-slot 52 will not encounter the weld beads in the middle area between the edges, thereby ensuring that the billet can easily perform the chamfering operation during the movement along the rolling direction without being unnecessarily obstructed.

[0048] The following describes the working process of the headless rolling billet chamfering device. The billet moves along the rolling direction. When the area requiring chamfering reaches the chamfering device, the telescopic rod of the linear drive mechanism 3 extends, and the swing arm swings towards the billet. When the swing arm reaches the chamfering station, the flanges of a pair of guide rollers are positioned at the designed width of the billet. For the moving billet, the guide rollers first guide and straighten its position, aligning the billet edges with the tool's process corner position. This application uses guide rollers to position the billet, ensuring that the chamfering dimensions match the tool's process dimensions. Next, as the billet advances along the rolling direction, the tool scrapes and chamfers the four edges of the billet.

[0049] It should be noted that the above-described actions of driving the cutting tool through the combination of the swing arm and the linear drive mechanism are merely illustrative. Other drive mechanisms can also be used to drive the cutting tool to switch between the chamfering station and the standby station. For example, the linear drive mechanism can be perpendicular to the rolling track, and the cutting tool can be directly mounted on the linear drive mechanism to directly drive the cutting tool to the chamfering station without setting up a swing arm.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for chamfering a headless rolling blank, characterized in that It includes a pair of chamfering mechanisms symmetrically arranged on both sides of the billet rolling mill, each chamfering mechanism comprising: Swing arm support; Linear drive mechanism support; A linear drive mechanism, one end of which is fixedly connected to a linear drive mechanism bracket; The swing arm has one end rotatably connected to the swing arm bracket, and the other end rotatably connected to the other end of the linear drive mechanism, which is used to drive the tool mounted on it to switch between the chamfering station and the standby station. A cutting tool is used to chamfer the edges of a billet during the rolling process at the chamfering station.

2. A device for chamfering a headless rolling blank according to claim 1, characterised in that Each swing arm is also equipped with a guide roller, and the guide roller at the chamfering station is located upstream of the cutter along the rolling direction.

3. A device for chamfering a headless rolling blank according to claim 2, characterised in that The cutting tool is block-shaped, and a first stepped through groove is provided on the side of the cutting tool facing the blank. The first stepped through groove passes through the cutting tool, and the minimum width of the side opening of the first stepped through groove is equal to the side width of the blank.

4. A device for chamfering a headless rolling blank according to claim 3, characterised in that At the bottom of the first stepped through groove, a second stepped through groove is also provided, and the second stepped through groove passes through the cutting tool.

5. The device according to claim 3, characterized in that, When the swing arm swings to the chamfering station, the rims of a pair of guide rollers are positioned at the designed width of the billet.

6. The device according to claim 3, characterized in that, When the swing arm swings to the chamfering station, the first stepped through grooves of a pair of cutters enclose a channel that matches the designed chamfered size of the blank.

7. A device for chamfering a headless rolling blank according to claim 4, characterised in that The second stepped through groove is located at the bottom middle position of the first stepped through groove.

8. The device according to claim 3, characterized in that, The side and bottom surfaces of the first stepped through groove are connected by a chamfered surface on the plane.

9. A device for chamfering a headless rolling blank according to claim 8, characterised in that The angle formed by the side surface and the bottom surface of the first stepped through groove is an obtuse angle.

10. The device according to claim 3, characterized in that, The side and bottom surfaces of the first stepped through groove are connected by an arc-shaped chamfered surface.

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