Knife rest assembly

Abstract

The utility model relates to a tool rest assembly, and belongs to the field of machining equipment. The tool rest assembly can be arranged on a cutter head of the beveling machine, and is characterized by comprising a tool bar and a follower wheel which are arranged in the axial direction, a blade is arranged on the tool bar, a certain distance is reserved between the follower wheel and the tool bar, the follower wheel is arranged on the radial outer side of the tool bar, and the follower wheel is arranged on the tool bar. The follower wheel abuts against the outer wall of the pipeline to be machined in the cutting process.

Description

[0001] This application is a divisional application of the utility model patent application with the application date of October 16, 2023, application number 202322776401.3, and invention name “beveling machine and tool holder assembly”. Technical Field

[0002] The utility model relates to the field of processing equipment, in particular to a tool holder assembly. Background Art

[0003] With the development of natural gas, petroleum, and chemical industries, internal expansion beveling machines have become indispensable beveling equipment in pipeline construction operations. The existing double-piston internal expansion beveling machines, affected by the size of the tensioning mechanism, have requirements for the minimum length of the straight pipe section of the pipeline. When the straight pipe section is less than this length, it cannot be clamped. For example, the length of the straight pipe section of the pipeline is required to be greater than 1 meter. However, according to technical specifications, the minimum length of the straight pipe section on the elbow in actual construction is often less than the minimum length required by the internal expansion beveling machine. For example, the length of the straight pipe section in actual construction may be only 500mm or less. For elbows whose straight pipe section length is less than the minimum length required by the beveling machine, they cannot be used. External clamping beveling machines are mostly used in construction. However, external clamping pipe beveling machines cannot automatically align and center, and have low beveling efficiency and poor beveling stability.

[0004] CN103358144B discloses an internal expansion clamping mechanism of a beveling machine, which has a hydraulic cylinder. When working, the front and rear push rods are pushed out synchronously by the hydraulic cylinder to achieve tension and clamping. The problem with this technology is that in practical applications, due to factors such as casting errors, transportation and stacking, the inner wall section of the pipe to be processed may not be a perfect circle. When the pipe cross section is elliptical or there is a depression, when the front and rear push rods of this internal expansion clamping mechanism are synchronously propped up, there is a situation where one push rod is fully tightened and then hinders the hydraulic cylinder from continuing to move, resulting in the other push rod being unable to be fully tightened. At this time, the clamping effect of the tensioning mechanism will be greatly reduced, thereby affecting the stability and safety of the entire beveling processing process. In addition, the tensioning mechanism uses an integral hydraulic cylinder, which has high requirements for the hydraulic pressure of the single cylinder. While increasing the difficulty of manufacturing the tensioning mechanism of the beveling machine, it also increases the manufacturing cost of the beveling machine.

[0005] In addition, in the interface pretreatment before welding, it is often necessary to bore the inner wall of the pipe interface so that the thickness of the pipe wall at the interface meets the requirements of technical specifications. When the existing beveling machine is boring, the boring depth cannot meet the requirements of technical specifications. It is necessary to provide a beveling machine that can not only bevel the pipe end face, but also bore the inner wall of the pipe at the interface to a greater depth. Summary of the invention

[0006] According to the first aspect of the present utility model, a beveling machine provided by the present utility model uses two superimposed pistons to drive the front and rear ejector rods respectively, shortening the distance between the front and rear ejector rods, thereby reducing the requirement for the length of the straight pipe section of the pipeline by the internal expansion type beveling machine. In addition, compared with the prior art, the method of driving the front and rear ejector rods of the double-piston asynchronous drive tightening mechanism enhances the clamping effect of the tightening mechanism of the internal expansion type beveling machine, thereby improving the stability and safety of the beveling machine. Further, through the improvement of the tool rest assembly in the cutting mechanism of the beveling machine, while realizing large-depth internal boring using the beveling machine, the strength of the tool rest assembly is increased, and the stability of the internal boring is improved.

[0007] (1) A beveling machine, comprising a frame, a main shaft, a tightening mechanism and a cutting mechanism, wherein the frame is connected to the main shaft, and the tightening mechanism and the cutting mechanism are arranged on the main shaft; the tightening mechanism includes: a first ejector rod, a second ejector rod, a first piston and a second piston, and the first piston includes a first piston body and a first piston cylinder; the first piston body is fixed on the main shaft, and the first piston body is the cylinder of the second piston; the first piston cylinder is movably connected to the first ejector rod to drive the first ejector rod, and the second piston is movably connected to the second ejector rod to drive the second ejector rod.

[0008] (2) The beveling machine according to (1), wherein the second piston includes a second piston body and a second piston rod, the second piston rod is fixedly connected to the second piston body and movably connected to the second ejector rod, and the second piston body drives the second piston rod to drive the second ejector rod.

[0009] (3) The beveling machine according to (1) or (2), wherein the first piston further includes a first cylinder head, and the second piston further includes a second cylinder head; the first cylinder head is fixedly connected to the first piston cylinder and serves as the cylinder head of the corresponding piston cylinder of the first piston; the second cylinder head is fixedly connected to the first piston body and serves as the cylinder head of the corresponding piston cylinder of the second piston.

[0010] (4) The beveling machine according to any one of (1) to (3), wherein the second piston body moves in the space formed by the main shaft and the first piston body; the first piston cylinder moves on the first piston body.

[0011] (5) The beveling machine according to any one of (1) to (4), wherein the first piston cylinder and the second piston body move axially.

[0012] (6) The beveling machine according to any one of (1) to (5), the fixing method of the first piston body on the main shaft includes bolt connection, riveting and welding; the fixed connection method between the first cylinder head and the first piston cylinder includes bolt connection, riveting and welding; the fixed connection method between the second cylinder head and the first piston body includes bolt connection, riveting and welding; the first piston cylinder and the first ejector rod are movably connected by a hinge; the second piston rod and the second ejector rod are movably connected by a hinge; the connection method between the second piston rod and the second piston body includes: threaded connection, bolt connection, welding, snap connection and riveting.

[0013] (7) The beveling machine according to any one of (1) to (6), when the beveling machine works, the first piston cylinder moves to drive the first ejector rod to extend radially, and the second piston body moves to drive the second ejector rod to extend radially, so as to clamp the inner wall of the pipe to be processed; after the beveling machine finishes working, the first piston cylinder moves to drive the first ejector rod to retract radially, and the second piston body moves to drive the second ejector rod to retract radially, so as to release the clamping of the pipe to be processed.

[0014] (8) The beveling machine according to any one of (1) to (7), the driving forces of the first piston and the second piston are independent of each other, that is, the movement of the first piston cylinder is independent of the movement of the second piston body.

[0015] (9) The beveling machine according to any one of (1) to (8), the cutting mechanism includes a cutter head and a tool holder assembly arranged on the cutter head; the tool holder assembly includes a tool rod arranged axially and a follower wheel, the tool rod is provided with blades, the follower wheel is spaced from the tool rod by a certain distance, the follower wheel is arranged radially outside the tool rod, and the follower wheel abuts against the outer wall of the pipe to be processed during cutting.

[0016] (10) The beveling machine according to any one of (1) to (9), the tool holder assembly further includes a tool holder installed on the cutter head, and the tool rod and the follower wheel are fixed on the tool holder.

[0017] (11) The beveling machine according to any one of (1) to (10), the distance between the follower wheel and the tool rod is adjustable.

[0018] (12) The beveling machine according to any one of (1) to (11), at the position where the tool rod is fixed on the tool holder, there is a groove, and screw holes are provided on the radially outer wall of the groove. After the tool rod is placed in the groove, it is fixed to the tool holder by screws. The methods for adjusting the distance between the follower wheel and the tool rod include: replacing tool rods of different sizes, adjusting screws, or adding or reducing shims.

[0019] (13) The beveling machine according to any one of (1) to (12), wherein the beveling machine is provided with multiple sets of tensioning mechanisms and multiple sets of cutting mechanisms, and the multiple sets of tensioning mechanisms are symmetrically arranged on the main shaft.

[0020] (14) The beveling machine according to any one of (1) to (13), wherein the working process of the beveling machine is as follows: before the beveling machine works, the first ejector rod and the second ejector rod of the tensioning mechanism extend out to tightly hold and clamp the inner wall of the pipe to be processed, the follower wheel of the cutting mechanism is abutted against the outer wall of the pipe to be processed, and the cutting tip of the blade is placed at the lower part near the inner wall of the wall thickness center of the pipe orifice end of the pipe to be processed; after the beveling machine is started, the cutter head drives the tool rest assembly to rotate to perform beveling cutting on the pipe to be processed.

[0021] (15) The beveling machine according to any one of (1) to (14), wherein the length of the tool bar is adjustable. When the beveling machine is used for internal boring, the length of the tool bar can be adjusted or the extending length of the tool bar on the tool rest can be adjusted according to different required internal boring depths.

[0022] (16) The beveling machine according to any one of (1) to (15), wherein the working process of the beveling machine is as follows: before the beveling machine works, the first ejector rod and the second ejector rod of the tensioning mechanism extend out to tightly hold and clamp the inner wall of the pipe to be processed, the follower wheel of the cutting mechanism is abutted against the outer wall of the pipe to be processed, and the blade is placed on the inner wall of the pipe to be processed by adjusting the length of the tool bar or the extending length of the tool bar on the tool rest; after the beveling machine is started, the cutter head drives the tool rest assembly to rotate to perform internal boring cutting on the pipe to be processed.

[0023] (17) A tool rest assembly is arranged on the cutter head of the beveling machine and includes a tool bar and a follower wheel arranged axially. A blade is provided on the tool bar. The follower wheel is spaced from the tool bar by a certain distance. The follower wheel is arranged radially outside the tool bar, and the follower wheel abuts against the outer wall of the pipe to be processed during cutting.

[0024] (18) The tool rest assembly according to (17), further comprising a tool rest installed on the cutter head, and the tool bar and the follower wheel are fixed on the tool rest.

[0025] (19) The tool rest assembly according to (17) or (18), wherein the distance between the follower wheel and the tool bar is adjustable.

[0026] (20) The tool rest assembly according to (17) to (19), wherein a groove is provided at the position on the tool rest for fixing the tool bar, screw holes are provided on the radial outer wall of the groove, and after the tool bar is placed in the groove, it is fixed to the tool rest by screws. The methods for adjusting the distance between the follower wheel and the tool bar include: replacing tool bars of different sizes, adjusting screws, or adding or reducing shims.

[0027] (21) The tool rest assembly according to (17) to (20), wherein the length of the tool bar is adjustable. When the beveling machine is used for internal boring, the length of the tool bar can be adjusted or the protruding length of the tool bar on the tool rest can be adjusted according to different required internal boring depths.

[0028] The beveling machine and the tool rest assembly provided by the present utility model have the following beneficial technical effects:

[0029] (1) By using two superimposed pistons, the distance between the front and rear ejector rods is shortened, thereby reducing the requirement for the length of the straight pipe section of the pipeline by the internal expansion type beveling machine;

[0030] (2) The clamping effect of the tightening mechanism of the internal expansion type beveling machine is enhanced, thereby improving the stability and safety of the beveling machine;

[0031] (3) While enabling the internal boring cutting with a larger depth by the beveling machine, the safety of the internal boring cutting with a larger depth is ensured, the strength of the tool rest assembly is increased, and the stability of the internal boring is improved.

[0032] Explanation of related terms involved in the present utility model:

[0033] (1) Beveling machine: In the process of welding manufacturing and processing, in order to ensure the welding quality, a professional machine for beveling the workpiece at the welding position before welding;

[0034] (2) Internal expansion type beveling machine: When beveling a pipeline, a beveling machine that uses a tightening mechanism to clamp the inner wall of the pipeline for fixation;

[0035] (3) Ejector rod: When the internal expansion type beveling machine equipment works, it is necessary to clamp the pipeline (workpiece to be processed). The function of the ejector rod is to clamp the pipeline (internal expansion clamping);

[0036] (4) Internal boring: Cutting the pipe wall of the original pipeline (workpiece to be processed) from the inner wall of the pipeline to make it thinner;

[0037] (5) Tool bar: A part for clamping and fixing the blade;

[0038] (6) Tool rest: A device for clamping the tool bar;

[0039] (7) Tool disc: A device for fixing the tool rest. Description of the Drawings

[0040] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] Figure 1 Schematic diagram of the tensioning mechanism of an internal expansion grooving machine in the prior art;

[0042] Figure 2 Schematic diagram of a grooving machine according to an embodiment of the present utility model;

[0043] Figure 3 Schematic diagram of the tensioning mechanism of a grooving machine according to an embodiment of the present utility model;

[0044] Figure 4 Schematic diagram of the tensioning mechanism in a clamped state according to an embodiment of the present utility model;

[0045] Figure 5 Schematic diagram of the tool rest assembly of a grooving machine in the prior art;

[0046] Figure 6 Schematic diagram of the structure of the tool rest assembly according to an embodiment of the present utility model.

[0047] In the figures, reference numeral 101 is the main shaft, 103 is the rear row ejector rod, 105 is the rear row piston cylinder, 107 is the front row piston cylinder, 109 is the front row ejector rod, 210 is the machine frame, 220 is the main shaft, 230 is the tensioning mechanism, 240 is the cutting mechanism, 241 is the tool rest assembly, 242 is the tool disc, 260 is the feeding mechanism, 290 is the pipeline to be processed, 291 is the inner wall of the pipeline to be processed, 1 is the second ejector rod, 3 is the second piston rod, 4 is the second cylinder head, 5 is the second piston body, 6 is the first cylinder head, 7 is the first piston cylinder barrel, 8 is the first piston body, 9 is the first ejector rod, 11 is the tool rest tray, 12 is the tool rest shaft, 13 is the tool rest, 14 is the bearing, 15 is the spring, 16 is the follower wheel, 17 is the tool rod, 510 is the tool rest assembly in the prior art, 511 is the follower wheel, 513 is the tool rod, 515 is the tool rest shaft, 516 is the bearing, 518 is the tool rest tray, 519 is the tool rest, 520 is the tool disc. Specific embodiments

[0048] Figure 1 Schematic diagram of the tensioning mechanism of an internal expansion grooving machine in the prior art. As Figure 1 shown, the tensioning mechanism includes a rear row ejector rod 103, a rear row piston cylinder 105, a front row piston cylinder 107 and a front row ejector rod 109. The rear row piston cylinder 105 and the front row piston cylinder 107 are arranged on the main shaft 101 in sequence along the axial direction.

[0049] When machining the pipe bevel, by operating the operating handle, the rear piston cylinder 105 and the front piston cylinder 107 respectively push the rear ejector rod 103 and the front ejector rod 109 to extend, clamping the inner wall of the pipe to be machined. The front and rear piston cylinders are coaxial asynchronous drive cylinders, which can achieve automatic alignment and centering. Restricted by the size, this tightening mechanism requires that the length of the straight pipe section of the pipe be greater than 1 meter. When the length of the straight pipe section in the bent pipe is less than 1 meter, it cannot be clamped, so the beveling machine with this tightening mechanism cannot be used for machining.

[0050] Figure 2 Schematic diagram of a beveling machine according to an embodiment of the present invention. As Figure 2 shown, the beveling machine provided by the present invention mainly includes a frame 210, a main shaft 220, a tightening mechanism 230 and a cutting mechanism 240. The frame 210 is connected to the main shaft 220, and the tightening mechanism 230 and the cutting mechanism 240 are arranged on the main shaft 220.

[0051] The tightening mechanism 230 is used to tighten and clamp the inner wall 291 of the pipe to be machined by the extended front and rear ejector rods when machining the pipe 290, so as to fix the beveling machine on the pipe 290 to be machined.

[0052] The cutting mechanism 240 is used to perform bevel machining on the end face of the pipe 290 and / or internal boring machining on the inner wall 291 of the pipe when machining the pipe 290. The cutting mechanism 240 may include a tool rest assembly 241 and a tool disc 242.

[0053] The beveling machine is provided with multiple groups of tightening mechanisms 230 and multiple groups of cutting mechanisms 240, and the multiple groups of tightening mechanisms 230 are symmetrically arranged on the main shaft 220. Preferably, four groups of tightening mechanisms 230 are symmetrically arranged on the main shaft 220.

[0054] In some embodiments, the beveling machine provided by the present invention may further include a feeding mechanism 260, which is used to perform an axial feeding operation when machining the pipe 290 to meet the accuracy requirements of the pipe end face bevel and / or the depth requirements of the internal boring of the pipe inner wall surface.

[0055] Figure 3 Schematic diagram of the tightening mechanism 230 of a beveling machine according to an embodiment of the present invention. As Figure 3 shown, the tightening mechanism 230 may include: a first ejector rod 9, a second ejector rod 1, a first piston and a second piston, and the first piston may include a first piston body 8 and a first piston cylinder 7.

[0056] The first piston body 8 is fixed on the main shaft 220, and relative to the second piston, the first piston body 8 is the cylinder of the second piston. The second piston is superimposed on the radial inner side of the first piston. Figure 3In the example, the first piston is the front-row piston and the second piston is the rear-row piston. Optionally, the first piston can also be the rear-row piston and the second piston can also be the front-row piston. That is, the stacking order of the above two pistons can be interchanged, that is, the front-row piston can be stacked on the radially inner side of the rear-row piston. The application does not limit the stacking order of the two pistons.

[0057] It should be noted that the so-called front row and rear row in this article are relative to the head direction of the beveling machine. The side close to the head is called the front row, and correspondingly, the side close to the fuselage is called the rear row. The piston in the embodiment of the present invention can refer to a hydraulic piston, a pneumatic piston or other piston-type fluid cylinders, and an oil pressure piston is preferably used.

[0058] According to some embodiments of the present invention, the first piston cylinder 7 is movably connected to the first ejector rod 9 to drive the first ejector rod 9, and the second piston body 5 is movably connected to the second ejector rod 1 to drive the second ejector rod 1. Wherein, the driving includes making the corresponding ejector rod extend or retract radially.

[0059] In some embodiments of the present invention, the second piston may include a second piston body 5 and a second piston rod 3. The second piston rod 3 is fixedly connected to the second piston body 5 and movably connected to the second ejector rod 1. The second piston body 5 drives the second piston rod 3 and then drives the second ejector rod 1. Wherein, the above-mentioned second piston rod 3 may be assembled with the second piston body 5 in a fixed connection manner. Optionally, the second piston rod 3 may also be integrally cast with the second piston body 5, and the present invention does not limit this.

[0060] In some embodiments, the first piston may further include a first cylinder head 6, and the second piston may further include a second cylinder head 4. The first cylinder head 6 is fixedly connected to the first piston cylinder 7 and serves as the cylinder head of the corresponding piston cylinder of the first piston; the second cylinder head 4 is fixedly connected to the first piston body 8 and serves as the cylinder head of the corresponding piston cylinder of the second piston.

[0061] The second piston body 5 moves in the space formed by the main shaft 220 and the first piston body 8, and the first piston cylinder 7 moves on the first piston body 8. In some embodiments, the first piston cylinder 7 and the second piston body 5 move axially in opposite directions. In other embodiments, the moving direction of the first piston cylinder 7 may also be the same as the moving direction of the second piston body 5.

[0062] In some embodiments, the fixing method of the first piston body 8 on the main shaft 220 may include but is not limited to bolt connection, riveting, welding, etc., and bolt connection is preferably adopted. The fixed connection methods between the first cylinder head 6 and the first piston cylinder 7, and between the second cylinder head 4 and the first piston body 8 may include but are not limited to bolt connection, riveting, welding, etc., and bolt connection is preferably adopted. The first piston cylinder 7 and the first ejector rod 9 can be movably connected by but not limited to a hinge. When the second piston rod 3 and the second piston body 5 are assembled together, the second piston rod 3 and the second ejector rod 1 can be movably connected by but not limited to a hinge, and the connection methods between the second piston rod 3 and the second piston body 5 include but are not limited to threaded connection, bolt connection, welding, snap connection and riveting, and threaded connection is preferably adopted; when the second piston rod 3 and the second piston body 5 are integrated, the second piston body 5 and the second ejector rod 1 can be movably connected by but not limited to a hinge.

[0063] As Figure 3 shown, in the non-working state, the first ejector rod 9 and the second ejector rod 1 of the tensioning mechanism 230 are in the retracted state. Before the beveling machine works, by operating the operating handle, the first piston cylinder 7 and the second piston body 5 can be moved axially to respectively push the first ejector rod 9 and the second ejector rod 1 to extend radially, and tightly clamp on the inner wall of the pipeline to be processed, so as to fix the beveling machine on the pipeline 290 to be processed.

[0064] As Figure 4 shown, it is a schematic diagram of the tensioning mechanism 230 in the clamping state according to an embodiment of the present invention. In the figure, the first piston cylinder 7 moves axially towards the head direction, pushing the first ejector rod 9 to extend; the second piston body 5 moves axially towards the fuselage direction, pushing the second ejector rod 1 to extend. After the first ejector rod 9 and the second ejector rod 1 extend, they tightly clamp on the inner wall of the pipeline to be processed, playing a role in fixing the beveling machine.

[0065] After the beveling machine finishes working, by operating the operating handle, the first piston cylinder 7 is moved axially towards the fuselage direction; the second piston body 5 is moved axially towards the head direction, respectively retracting the first ejector rod 9 and the second ejector rod 1 radially, so as to release the clamping of the pipeline 290 to be processed, and the tensioning mechanism 230 can be restored to the non-working state as Figure 3 shown.

[0066] In the above embodiments, the moving direction of the first piston cylinder 7 is opposite to that of the second piston body 5. Optionally, the moving directions of the first piston cylinder 7 and the second piston 5 can also be made the same by adding other components or changing the layout.

[0067] According to some embodiments of the present utility model, the driving forces of the first piston and the second piston are independent of each other, that is, the movement of the first piston cylinder 7 is independent of the movement of the second piston body 5, which can be achieved by setting relatively independent pressure supply fluid pipelines. For example, when the above pistons are oil pressure pistons, the asynchronous driving of the above two pistons can be achieved by setting relatively independent oil pipelines.

[0068] In the above embodiments of the present utility model, by superimposing two asynchronous pistons, the distance between the front and rear ejector rods of the internal expanding beveling machine is shortened, the requirement for the length of the straight pipe section of the pipeline by the internal expanding beveling machine is reduced, and the internal expanding beveling machine can be applied to the bending pipe processing with a straight pipe section length less than the minimum length required by the existing beveling machine. Compared with the prior art, adopting the method of two superimposed asynchronous pistons reduces the manufacturing difficulty and cost of the tightening mechanism while enhancing the clamping ability of the tightening mechanism of the beveling machine and improving the construction stability and safety of the beveling machine.

[0069] In the interface preprocessing before pipeline welding, it is often necessary to internally bore the inner wall of the pipeline interface so that the thickness of the pipeline wall at the interface meets the requirements of the technical specifications. For example, according to the existing technical specifications, the depth of internal boring is usually 120 mm extending inward from the pipeline interface. With the development of technology, this depth may change.

[0070] Figure 5 Schematic diagram of the tool rest assembly of the beveling machine in the prior art, as Figure 5 (b) shown, when the existing beveling machine performs internal boring, the follower wheel 511 in the tool rest assembly 510 abuts against the inner wall of the pipeline 290, and the inner wall 291 of the pipeline is used as the boring reference. During internal boring, first place the follower wheel 511 and the tool bar 513 equipped with the blade on the inner wall 291 of the pipeline, start the beveling machine to rotate the cutter head 520, the cutter head 520 drives the tool rest assembly 510 to rotate, and the tool bar 513 equipped with the blade in the tool rest assembly 510 starts to bore. When the depth of internal boring is relatively deep, both the axle of the follower wheel 511 and the tool bar 513 need to be lengthened. After lengthening, the follower wheel 511 may interfere with the ejector rod of the tightening mechanism, thus affecting the safety of internal boring processing. And to prevent tool chatter, the tool bar 513 will also be thickened while being lengthened. To avoid the thickened tool bar 513, the diameter of the corresponding follower wheel 511 also needs to be increased. After the follower wheel 511 is increased, the weight of the tool rest assembly 510 becomes larger, and the centrifugal force during operation becomes larger, affecting the service life of the cutter head 520.

[0071] To address the above problems, in some other embodiments of the present utility model, improvements are made to the tool rest assembly 241 of the cutting mechanism 240 of the beveling machine.

[0072] Figure 6 Schematic diagram of the structure of the tool rest assembly 241 according to an embodiment of the present utility model. AsFigure 6 As shown, the tool rest assembly 241 may include: a tool rest tray 11, a tool rest shaft 12, a tool rest 13, a bearing 14, a spring 15, a follower wheel 16, and a tool shank 17.

[0073] The tool rest tray 11 is fixed on the tool disc 242. While fixing the tool rest tray 11, the tool rest shaft 12 is also fixed on the tool disc 242. The tool rest 13 is connected to the tool disc 242 through the tool rest shaft 12. The tool rest 13 can rotate around the tool rest shaft 12 through the bearing 14. At the same time, the tool rest 13 is connected to the spring 15, enabling the floating of the boring tool rest inside the tool rest 13. The follower wheel 16 and the tool shank 17 are arranged on the tool rest 13 at a certain distance. The follower wheel 16 is arranged on the radial outer side of the tool shank 17. During cutting, the follower wheel 16 abuts against the outer wall of the pipeline to be processed 291. A cutting blade is installed on the tool shank 17.

[0074] In some embodiments, the tool rest assembly may only include the follower wheel 16 and the tool shank 17. At this time, the follower wheel 16 and the tool shank 17 do not need to be installed on the tool rest 13. That is, the follower wheel 16 and the tool shank 17 can be directly arranged on the tool disc 242 at a certain distance, and the follower wheel 16 is arranged on the radial outer side of the tool shank 17.

[0075] The distance between the follower wheel 16 and the tool shank 17 determines the size of the internal boring groove. In some other embodiments, the distance between the follower wheel 16 and the tool shank 17 is adjustable. A groove is provided at the position on the tool rest 13 where the tool shank 17 is fixed. A screw hole is provided on the radial outer wall of the groove. After the tool shank 17 is placed in the groove, it can be fixed on the tool rest 13 through a compression screw. The distance between the follower wheel 16 and the tool shank 17 can be adjusted by replacing tool shanks 17 of different sizes, or by adjusting the screw. In some embodiments, an adjusting shim is also provided between the tool shank 17 and the compression screw. At this time, the distance between the follower wheel 16 and the tool shank 17 can be adjusted by increasing or decreasing the adjusting shim.

[0076] According to some embodiments of the present utility model, the working process of the above groove machine is as follows: Before the groove machine works, the first ejector rod 9 and the second ejector rod 1 of the tensioning mechanism 230 extend to tension and clamp the inner wall of the pipeline to be processed 291. The follower wheel 16 of the cutting mechanism 240 is abutted against the outer wall of the pipeline to be processed. The cutting tip of the cutting blade on the tool shank 17 is placed at the lower part on the inner wall side near the wall thickness center of the pipe orifice end face of the pipeline to be processed 290. After the groove machine is started, the tool disc 242 drives the tool rest assembly 241 to rotate, and performs groove cutting on the end face of the pipeline to be processed 290.

[0077] In some embodiments, the length of the tool bar 17 or the protruding length of the tool bar 17 relative to the tool rest 13 is adjustable. When the above beveling machine is used for internal boring, the length of the tool bar 17 can be adjusted or the protruding length of the tool bar 17 on the tool rest 13 can be adjusted according to different required internal boring depths. At this time, the working process of the above beveling machine is as follows: Before the beveling machine works, the first ejector rod 9 and the second ejector rod 1 of the tensioning mechanism 230 extend out to tension and clamp the inner wall 291 of the pipe to be processed, and the follower wheel 16 of the cutting mechanism 240 is abutted against the outer wall of the pipe to be processed. By adjusting the length of the tool bar 17 or adjusting the protruding length of the tool bar 17 on the tool rest 13, the cutting blade on the tool bar 17 is placed on the inner wall 291 of the pipe 290 to be processed. After the beveling machine is started, the cutter head 242 drives the tool rest assembly 241 to rotate to perform internal boring cutting on the pipe 290 to be processed.

[0078] The beveling machine with the tool rest assembly 241 and the tensioning mechanism 230 provided in the above embodiments of the present invention can perform internal boring processing on bent pipes with a straight pipe section length less than the minimum length required by the existing beveling machine. However, the above embodiments are not intended to limit that the tool rest assembly 241 provided in the present invention must be assembled and used in the same beveling machine with the tensioning mechanism 230. Optionally, the tool rest assembly 241 provided by the present invention can also be used in the beveling machine in the prior art. For example, by replacing the tool rest assembly of the beveling machine in the prior art with the tool rest assembly 241 provided by the present invention, internal boring processing of the pipe can be achieved.

[0079] In the above embodiments of the present invention, by improving components such as the tool bar and the follower wheel in the tool rest assembly, the problem that the internal boring processing depth of the existing beveling machine cannot meet the technical requirements is solved. At the same time, the follower wheel for selecting the boring reference during internal boring is moved from the inner wall of the pipe to be processed to the outer wall of the pipe to be processed, avoiding interference between the follower wheel and the ejector rod during the boring process. While improving the safety of internal boring processing, the strength of the improved tool rest assembly is further enhanced, thereby enhancing the stability of the beveling machine during internal boring beveling.

[0080] The above embodiments are not an exhaustive list of specific implementation manners, and there may be other embodiments. The above embodiments are intended to illustrate the present invention rather than limit the protection scope of the present invention. All applications obtained by simple changes of the present invention fall within the protection scope of the present invention.

[0081] This patent specification uses examples to illustrate the present utility model, including the best mode, and enables those skilled in the art to make and use this patent. The scope of authorization of this utility model includes the content of the claims and the specific implementation manners and the content of other embodiments in the specification. These other examples should also fall within the scope of the claims of the present utility model as long as they contain the technical features described in the same written language as the claims, or they contain similar literal language descriptions of technical features that have no substantial difference from the claims.

[0082] The entire content of all patents, patent applications, and other references cited in this utility model shall be incorporated into this application document by reference. However, if a term in this application conflicts with a term in the incorporated reference, the term in this application shall prevail.

[0083] It should be noted that terms such as "first", "second", or similar terms do not denote any order, quality, or importance, but are only used to distinguish different technical features. The modifier "about" used in conjunction with a quantity encompasses the value and the meaning specified in the context of the content. (For example: it encompasses the error in measuring a specific quantity).

Claims

1. A tool rest assembly (241) is provided on a cutter head (242) of a beveling machine. It is characterized in that it includes a tool shank (17) and a follower wheel (16) arranged axially. A cutting blade is provided on the tool shank (17). The follower wheel (16) is spaced from the tool shank (17) by a certain distance. The follower wheel (16) is arranged radially outside the tool shank (17), and the follower wheel (16) abuts against the outer wall of the pipeline to be processed during cutting.

2. The tool rest assembly (241) according to claim 1, It is characterized in that the tool rest assembly (241) further includes a tool rest (13) installed on the cutter head (242), and the tool shank (17) and the follower wheel (16) are fixed on the tool rest (13).

3. The tool rest assembly (241) according to claim 1, It is characterized in that the distance between the follower wheel (16) and the tool shank (17) is adjustable.

4. The tool rest assembly (241) according to claim 2, It is characterized in that a groove is provided at the position on the tool rest (13) where the tool shank (17) is fixed. Screw holes are provided on the outer wall of the groove in the radial direction. After the tool shank (17) is placed in the groove, it is fixed to the tool rest (13) by screws. The methods for adjusting the distance between the follower wheel (16) and the tool shank (17) include: replacing tool shanks (17) of different sizes, adjusting screws, or adding or reducing shims.

5. The tool rest assembly (241) according to claim 2, It is characterized in that the length of the tool shank (17) is adjustable. When the beveling machine is used for internal boring, the length of the tool shank (17) can be adjusted or the protruding length of the tool shank (17) on the tool rest (13) can be adjusted according to different required internal boring depths.

6. The tool rest assembly (241) according to claim 5, It is characterized in that when the tool rest (13) is placed at the internal boring installation position of the cutter head (242), the follower wheel (16) is on the outer wall side of the pipeline to be processed, and the tool shank (17) is on the inner wall side of the pipeline to be processed; selecting tool shanks (17) of different lengths or adjusting the protruding length of the tool shank (17) on the tool rest (13) can adjust the depth of internal boring; the relative distance between the follower wheel (16) and the tool shank (17) is adjustable; the cutting blade is placed on the inner wall side of the pipeline to be processed during internal boring. After the beveling machine is started, the cutter head (242) drives the tool rest assembly (241) to rotate, and internal boring cutting is performed on the pipeline to be processed.

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