Tool for removing excess weld metal of outer weld joint of longitudinal submerged arc welding pipe

Abstract

The utility model provides a longitudinal submerged arc welding pipe outer weld reinforcement removing cutter, which belongs to the technical field of welded pipe processing, and comprises a cutter body, the cutter body comprises a cutter bar and a cutter head which are connected up and down, the cutter bar is used for being connected with a main shaft of a milling machine, the lower end of the cutter head is provided with a plurality of mounting parts which are uniformly arranged along the circumferential direction, and the cutter head is connected with the cutter bar. The mounting part is detachably connected with a blade, and the blade is provided with an arc-shaped cutting edge which is sunken inwards. According to the tool for removing the surplus height of the outer welding seam of the longitudinal submerged arc welding pipe, the surplus height of the welding seam can be removed on the whole, surplus height residues of the welding seam are reduced, and therefore edges and corners are prevented from existing on the remaining welding seam after machining.

Description

Technical Field

[0001] This utility model belongs to the field of welded pipe processing technology, and more specifically, it relates to a tool for removing excess weld height on the outer weld seam of a straight seam submerged arc welded pipe. Background Technology

[0002] Before application, straight seam submerged arc welded pipes require anti-corrosion treatment. A common method is to coat the outside of the pipe with a semi-fluid anti-corrosion material, such as PE or PP, by extrusion and thinning, and then wrapping it around the surface of the pipe to form an anti-corrosion coating. However, since the outer weld seam on the pipe is usually higher than the surface of the pipe, if the height of the outer weld seam is not treated, the outer weld seam area will have a thinning effect on the anti-corrosion coating. In order to ensure the thickness requirement of the anti-corrosion coating at the outer weld seam, it is necessary to increase or decrease the overall thickness of the anti-corrosion coating of the pipe, which greatly increases the consumption of anti-corrosion material and increases production costs.

[0003] To solve the above problems, it is usually necessary to perform secondary processing on the outer weld of the welded pipe to reduce the height of the outer weld, that is, to remove the weld excess height. Currently, because grinding to remove the weld excess height causes dust pollution, some factories have adopted milling to remove the weld excess height instead of grinding. Milling to remove the weld excess height involves placing the welded pipe on the workstation, with a milling cutter connected to the spindle of the milling machine. The milling machine controls the milling cutter to remove the weld excess height. Milling can process the weld excess height into iron filings, thereby reducing dust pollution. However, conventional milling usually processes flat surfaces, while the outer weld of the welded pipe is attached to the curved surface of the welded pipe. After the weld excess height is straightened by milling, sharp edges will be formed on the remaining weld. Due to the presence of sharp edges, the thickness of the anti-corrosion coating changes drastically when passing through the sharp edges, causing the coating to be subjected to concentrated stress at the sharp edges, which can lead to cracking of the coating at the sharp edges in severe cases. Utility Model Content

[0004] The purpose of this utility model is to provide a tool for removing excess weld height on the outer weld of a straight seam submerged arc welded pipe, which aims to solve the problem that sharp edges are easily formed on the remaining weld during conventional milling to remove excess weld height on the outer weld of welded pipe.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tool for removing excess weld height of the outer weld seam of a straight seam submerged arc welded pipe is provided, including a tool body, the tool body including a tool bar and a cutter disc connected vertically, the tool bar being used to connect to the spindle of a milling machine, the lower end of the cutter disc having a plurality of evenly arranged mounting parts along its circumference, and a blade being detachably connected to the mounting part, the blade having an inwardly concave arc-shaped cutting edge.

[0006] In one possible implementation, the mounting portion has a mounting surface parallel to the axial direction of the cutter head, the blade is bolted to the mounting surface, and the arc-shaped cutting edge is arranged facing outward.

[0007] In one possible implementation, the cutting tool includes a rake face and a flank face that are parallel and of the same size, the flank face being attached to the mounting surface, and a first side face being connected between the rake face and the flank face. The first side face is an inwardly concave arc-shaped surface, and the common edge of the rake face and the first side face forms the arc-shaped cutting edge.

[0008] In one possible implementation, a retaining block is provided on the back blade surface, and a retaining groove adapted to the retaining block is provided on the mounting surface. The retaining block is inserted into the retaining groove to define the mounting position of the blade.

[0009] In one possible implementation, there are four first side cutting faces, which are evenly arranged around the front and rear cutting faces in the circumference, and adjacent first side cutting faces are connected by arc surfaces.

[0010] In one possible implementation, the locking block is a regular square prism located at the center of the back face.

[0011] In one possible implementation, the card block is integrally formed with the blade.

[0012] In one possible implementation, the mounting portion is integrally formed with the cutter head.

[0013] In one possible implementation, the tool holder and the tool disc are integrally formed.

[0014] The beneficial effects of the tool for removing excess weld height of straight seam submerged arc welded pipe provided by this utility model are as follows: Compared with the prior art, the tool for removing excess weld height of straight seam submerged arc welded pipe is used by mounting the tool body on the spindle of a milling machine, placing the welded pipe on the worktable, so that the weld seam on the welded pipe is in a suitable processing position, and operating the milling machine to rotate the spindle and drive the arc-shaped cutting edge to mill the excess weld height. Due to the arc-shaped design of the arc-shaped cutting edge, the milled surface obtained by the tool body is an arc-shaped surface, so the excess weld height can be removed as a whole, reducing the excess weld height residue, and thus avoiding the presence of sharp edges on the remaining weld after processing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1A schematic diagram of the main structure of a tool for removing excess weld height from the outer weld seam of a straight seam submerged arc welded pipe, provided for an embodiment of this utility model;

[0017] Figure 2 A bottom view of a tool for removing excess weld height from the outer weld seam of a straight seam submerged arc welded pipe, provided as an embodiment of this utility model;

[0018] Figure 3 For along Figure 1 Cross-sectional view of line AA in the middle;

[0019] Figure 4 A perspective view of the blade at a first angle provided for an embodiment of this utility model;

[0020] Figure 5 A perspective view of the blade from a second angle provided in an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Tool body; 11. Tool holder; 12. Tool disc; 121. Groove; 2. Mounting part; 21. Mounting surface; 211. Slot; 3. Tool; 31. Front face; 32. Back face; 33. First side face; 34. Arc surface; 301. Arc-shaped cutting edge; 302. Through hole; 4. Locking block; 5. Screw. Detailed Implementation

[0023] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Please see Figures 1 to 5 This invention provides a tool for removing excess weld height from the outer weld seam of a straight seam submerged arc welded pipe. The tool includes a cutter body 1, which comprises a cutter shank 11 and a cutter disc 12 connected vertically. The cutter shank 11 is used to connect to the spindle of a milling machine. The lower end of the cutter disc 12 has multiple evenly arranged mounting portions 2 along its circumference. A blade 3 is detachably connected to each mounting portion 2, and the blade 3 has an inwardly recessed arc-shaped cutting edge 301. In practical applications, to achieve better processing results, the diameter of the arc corresponding to the arc-shaped cutting edge is equal to or slightly larger than the outer diameter of the welded pipe to be processed. This allows the processing surface formed by the arc-shaped cutting edge 301 to fit more closely with the outer surface of the welded pipe, thereby enabling more thorough removal of the excess weld height and avoiding sharp edges in the processed weld.

[0028] This utility model provides a tool for removing excess weld height from the outer weld seam of a straight seam submerged arc welded pipe. Compared with the prior art, when using this tool, the tool body 1 is installed on the spindle of a milling machine, the welded pipe is placed on the worktable, and the weld seam on the welded pipe is placed in a suitable processing position. The milling machine is operated to rotate the spindle, which in turn drives the arc-shaped cutting edge 301 to mill the excess weld height. Due to the arc-shaped design of the arc-shaped cutting edge 301, the milled surface obtained by the tool body 1 is an arc-shaped surface, which can remove the excess weld height as a whole, reduce the excess weld height residue, and thus avoid the presence of sharp edges on the remaining weld seam.

[0029] In some embodiments, please refer to Figures 1 to 3To ensure the overall structural strength of the cutter body 1, the cutter bar 11 and the cutter disc 12 are integrally formed from the same material. Both the cutter bar 11 and the cutter disc 12 are cylindrical structures, coaxially arranged, and the diameter of the cutter bar 11 is smaller than the diameter of the cutter disc 12. The mounting part 2 is located at the lower part of the cutter disc 12 and integrally formed with the cutter disc 12. In this embodiment, there are four mounting parts 2. During processing, four grooves 121 that penetrate the bottom surface of the cutter disc 12 are evenly opened circumferentially on the side wall near the bottom surface of the cutter disc 12. The part of the cutter disc 12 located between the four grooves 121 forms the mounting part 2. Each mounting part 2 includes at least one mounting surface 21 that is longitudinally arranged parallel to the axial direction of the cutter disc 12. The mounting surface 21 is used to mount the blade 3. In this embodiment, the blade 3 includes a front cutting face 31 and a rear cutting face 32 that are parallel and the same size. During installation, the rear cutting face 32 is attached to the mounting surface 21. A through hole 302 is provided in the middle of the blade 3, and a threaded hole is provided on the mounting surface 21. During use, the blade 3 can be bolted to the mounting surface 21 with the help of screws 5 to fix the blade 3.

[0030] In this embodiment, please refer to Figure 4 and Figure 5 A first side face 33 is connected between the front face 31 and the rear face 32 of the blade 3. The first side face 33 is an arc-shaped surface that is concave towards the center of the blade 3. The common edge between the first side face 33 and the front face 31 forms an arc-shaped cutting edge 301. When the blade 3 is installed on the mounting part 2, the arc-shaped cutting edge 301 is located outside the side wall of the mounting plate.

[0031] Optional, please refer to Figure 2 , Figure 3 and Figure 5 A locking block 4 is provided on the back face 32 of the blade 3, and a corresponding slot 211 for inserting the locking block 4 is provided on the mounting surface 21 of the mounting part 2. In use, the mounting position of the blade 3 can be quickly positioned by the insertion and engagement of the locking block 4 and the slot 211, thereby improving the installation efficiency. Optionally, the locking block 4 is located in the middle of the back face 32, and the threaded hole for connecting the screw 5 on the mounting surface 21 is located in the slot 211.

[0032] Further, please refer to Figure 4 and Figure 5 The number of first side cutting surfaces 33 on the blade 3 is four. The four first side cutting surfaces 33 are evenly arranged around the front cutting surface 31 and the rear cutting surface 32 in the circumference, and the adjacent first side cutting surfaces 33 are connected by arc surfaces 34. Through the above arrangement, each blade 3 can have four arc-shaped cutting edges 301 at the same time. In practical applications, the four arc-shaped cutting edges 301 on the blade 3 can be used in turn, which improves the practicality of the blade 3.

[0033] Furthermore, in this embodiment, the locking block 4 is set as a regular square prism fixedly connected to the center of the back face 32, and the four sides of the locking block 4 correspond to the four arc-shaped cutting edges 301 on the blade 3. This setting can ensure that after rotating the blade 3 to change the arc-shaped cutting edges 301 used for machining, the locking block 4 and the slot 211 can still accurately position the blade 3.

[0034] Optionally, the blade 3 and the locking block 4 can be integrally formed to increase the connection strength between the blade 3 and the locking block 4. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A straight seam, submerged arc, pipe, external weld, excess bead removal tool characterized by, The tool includes a tool body (1), which includes a tool bar (11) and a cutter head (12) connected vertically. The tool bar (11) is used to connect to the spindle of the milling machine. The lower end of the cutter head (12) is provided with a plurality of uniformly arranged mounting parts (2) along its circumference. The mounting parts (2) are detachably connected with blades (3), and the blades (3) have an inwardly recessed arc-shaped cutting edge (301).

2. A straight seam submerged arc pipe outer weld bead removal tool as claimed in claim 1 wherein, The mounting part (2) is provided with a mounting surface (21) parallel to the axial direction of the cutter head (12), the blade (3) is bolted to the mounting surface (21), and the arc-shaped cutting edge (301) is set outward.

3. A straight seam submerged arc pipe outer weld bead removal tool as claimed in claim 2 wherein, The blade (3) includes a rake face (31) and a flank face (32) that are parallel and of the same size. The flank face (32) is attached to the mounting surface (21). A first side face (33) is connected between the rake face (31) and the flank face (32). The first side face (33) is an inwardly concave arc-shaped surface. The common edge of the rake face (31) and the first side face (33) forms the arc-shaped cutting edge (301).

4. A straight seam submerged arc pipe outer weld bead removal tool as claimed in claim 3 wherein, The back face (32) is provided with a locking block (4), and the mounting surface (21) is provided with a slot (211) adapted to the locking block (4). The locking block (4) is inserted into the slot (211) to limit the installation position of the blade (3).

5. A straight seam submerged arc pipe outer weld bead removal tool as claimed in claim 4 wherein, The number of the first side cutting surfaces (33) is four. The four first side cutting surfaces (33) are evenly arranged around the front cutting surface (31) and the rear cutting surface (32) in the circumference, and the adjacent first side cutting surfaces (33) are connected by arc surfaces (34).

6. A straight seam submerged arc pipe outer weld bead removal tool as claimed in claim 5 wherein, The locking block (4) is a regular square prism located at the center of the back face (32).

7. A straight seam submerged arc pipe outer weld bead removal tool as claimed in claim 6 wherein, The card block (4) and the blade (3) are integrally formed.

8. A straight seam submerged arc pipe external weld bead removal tool as defined in Claim 1 wherein, The mounting part (2) is integrally formed with the cutter head (12).

9. A straight seam submerged arc pipe outer weld bead removal tool as claimed in claim 1 wherein, The cutter bar (11) and the cutter head (12) are integrally formed.

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