Deep hole welding seam removing tool

Abstract

The utility model relates to the technical field of petrochemical pipeline machining, in particular to a deep hole welding seam removing tool which comprises a main shaft, a positioning sleeve, an outer base sleeve and a cutter assembly, the positioning sleeve is coaxially installed at the end of the outer base sleeve, and the main shaft coaxially penetrates through the outer base sleeve and the positioning sleeve and rotates together with the outer base sleeve. The main shaft can axially move in a preset range relative to the outer base sleeve; the cutter assembly comprises a cutter holder, a blade and an elastic piece, and the main shaft axially moves to drive the cutter holder and the blade to be radially close to / away from a repaired weld joint. And under the rotating transmission of the machining equipment, the cutter assembly rotates to machine the deep hole welding seam. The tool has the advantages that the structure is simple, operation is convenient, a deep hole welding seam structure with a certain depth can be machined, defective welding seams can be removed, welding seam grooves can be machined at the same time, and compared with a method for removing the welding seams through polishing, efficiency and quality are greatly improved, the quality of the repaired welding seams can be guaranteed, and therefore the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical pipeline processing technology, specifically to a tool for removing weld metal from deep-hole welds and processing the bevel of deep-hole welds, and more specifically to a deep-hole weld removal tool. Background Technology

[0002] Heat exchangers are widely used in the chemical, petroleum, pharmaceutical, nuclear, and nuclear industries, with shell-and-tube heat exchangers being the most common. In the design and manufacturing of shell-and-tube heat exchangers, the quality of the welding between the heat exchange tubes and the tube sheet holes determines the overall quality and service life of the heat exchanger. In conventional welded structures, gaps between the tube sheet holes and the heat exchange tubes can easily lead to problems such as crevice corrosion and overheating. Internal hole welding overcomes these problems; long-distance internal hole welding is commonly referred to as deep hole welding. During equipment manufacturing, after the tube sheet holes and the deep holes of the heat exchange tubes are welded together, the deep hole weld between the heat exchange tubes and the tube sheet must be inspected and tested for defects to ensure its quality. If problems are found, rework is required. The traditional rework method involves grinding away the weld using an internal grinder and then re-welding it back. Although the above repair methods can repair welds, the welds are too deep, making grinding difficult, inefficient, and difficult to guarantee the quality of grinding. In fact, grinding may even result in grinding the wrong position, so the quality of the repaired welds cannot be guaranteed, which also reduces the quality of the product. Summary of the Invention

[0003] In view of the above-mentioned technical problems, the present invention provides a deep hole weld seam removal tool.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A deep hole weld seam removal tool is provided, including a spindle, a positioning sleeve, an outer base sleeve, and a tool assembly. The positioning sleeve is coaxially mounted on the end of the outer base sleeve and is used for coaxial insertion and locking to the outer hole.

[0006] A bearing is provided between the outer base sleeve and the positioning sleeve to allow them to rotate relative to each other.

[0007] The spindle passes coaxially through the outer base sleeve and the positioning sleeve, and rotates together with the outer base sleeve. The spindle can move axially relative to the outer base sleeve within a preset range. The spindle is provided with a tool clamping groove along its length, and the tool clamping groove is provided with a first inclined surface.

[0008] The tool assembly includes a tool holder, a cutting tool, and a spring. The cutting tool is fixed to the tool holder, which has a second inclined surface. The two ends of the spring are connected to the outer base sleeve and the tool holder, respectively, so that the second inclined surface keeps in contact with the first inclined surface. The spindle moves axially, causing the tool holder and the cutting tool to move radially closer to / away from the weld being repaired.

[0009] As a further alternative, the spindle is fixed with a spring sleeve, which contains a compression spring. The compression spring presses against the spring sleeve and the outer base sleeve respectively, so that the spindle maintains the potential energy to return to the initial state.

[0010] As a further optional solution, a first stop step is provided on the outer side of the spindle, and a second stop step is provided on the inner side of the outer base sleeve. In the initial state, the first stop step axially abuts against the second stop step.

[0011] As a further optional solution, the spring sleeve is installed with the spindle, the tool holder with the blade, the outer base sleeve with the spindle, and the spring piece with the outer base sleeve via grommets.

[0012] As a further optional solution, the outer side of the spindle is provided with a guide groove arranged along the axial direction, and the outer base sleeve is provided with a guide pin embedded in the guide groove.

[0013] As a further alternative, the outer side of the positioning sleeve is provided with an annular groove, in which a retaining spring is embedded, and the retaining spring provides axial restraint to the outer base sleeve.

[0014] As a further alternative, the tool holder is provided with a locking groove, and the end of the spring is bent and embedded in the locking groove; the tool assembly also includes a clamping block and a locking screw, the locking screw fixing the clamping block to the tool holder, and the clamping block pressing down on the spring.

[0015] As a further optional solution, a positioning protrusion is provided on the outer side of the positioning sleeve.

[0016] As a further alternative, the end of the spindle is provided with a Morse taper shank.

[0017] As a further optional solution, the end of the spindle is provided with a chip discharge port that connects to the tool holder groove.

[0018] The beneficial effects of this utility model are:

[0019] This utility model discloses a deep hole weld seam removal tool. In use, the positioning sleeve is fixed at the opening of the deep hole weld seam structure. The external machining equipment drives the spindle. When the spindle moves axially, it can drive the tool holder and the blade to radially approach and contact the weld seam to be repaired by utilizing the displacement principle of the tilt angle between the first and second inclined surfaces. The spindle, outer base sleeve and tool assembly rotate together, thereby enabling the blade to process the weld seam.

[0020] Compared with existing technologies, this technology solves the problem of difficult repair of deep hole welds, avoids the problems of difficult grinding, low efficiency and inaccurate grinding dimensions, and ensures the size of the weld bevel after repair, thereby ensuring the quality of deep hole welds. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the structure of a deep hole weld seam removal tool in the embodiment.

[0022] Figure 2 This is a schematic diagram of a deep hole weld seam removal tool combined with a deep hole weld seam structure in an embodiment.

[0023] Figure label:

[0024] Tube sheet 01, tube hole 011, short cylinder 012, heat exchange tube 02, weld 03;

[0025] Spindle 1, tool holder groove 11, first inclined surface 12, first stop step 13, guide groove 14, Morse taper shank 15, chip removal port 16;

[0026] Positioning sleeve 2, ring groove 21, retaining ring 22, positioning protrusion ring 23;

[0027] Outer base sleeve 3, second stop step 31;

[0028] Tool assembly 4, tool holder 41, second inclined surface 411, locking groove 412, blade 42, spring 43, clamping block 44, locking screw 45;

[0029] 5. Bearing; 6. Spring sleeve; 7. Compression spring;

[0030] First machine screw 81, second machine screw 82, third machine screw 83, fourth machine screw 84. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] This embodiment provides a deep-hole weld seam removal tool, such as... Figure 1 and Figure 2 As shown, the tube sheet 01, heat exchange tube 02, and weld 03 form a deep-hole weld structure. A short cylindrical body 012 extends inward from the tube hole 011 of the tube sheet 01. The heat exchange tube 02 and the short cylindrical body 012 form a weld 03 connection. This tool is used to remove problematic welds and simultaneously machine the weld bevel. The tool includes a spindle 1, a positioning sleeve 2, an outer base sleeve 3, and a tool assembly 4. The positioning sleeve 2 is coaxially mounted on the end of the outer base sleeve 3. The positioning sleeve 2 is used to coaxially insert and lock into the tube hole 011. That is, during use, the positioning sleeve 2 is fixed to the tube hole 011 and cannot move axially or rotate.

[0033] In this embodiment, a bearing 5 is provided between the outer base sleeve 3 and the positioning sleeve 2 so that the outer base sleeve 3 can rotate relative to the positioning sleeve 2. The bearing 5 is a planar thrust bearing.

[0034] The main spindle 1 passes coaxially through the outer base sleeve 3 and the positioning sleeve 2, and rotates together with the outer base sleeve 3. The main spindle 1 can move axially relative to the outer base sleeve 3 within a preset range. The main spindle 1 is provided with a tool clamping groove 11 along the length direction, and the tool clamping groove 11 is provided with a first inclined surface 12.

[0035] The tool assembly 4 includes a tool holder 41, a cutting blade 42, and a spring 43. The cutting blade 42 is fixed to the tool holder 41. The tool holder 41 is provided with a second inclined surface 411. The two ends of the spring 43 are respectively connected to the outer base sleeve 3 and the tool holder 41. The elastic force of the spring 43 keeps the second inclined surface 411 in contact with the first inclined surface 12. The spindle 1 moves axially, causing the tool holder 41 and the cutting blade 42 to move radially closer to / away from the weld being repaired.

[0036] In use, the positioning sleeve 2 is fixed to the pipe hole 011. The peripheral machining equipment drives the spindle 1 to rotate axially. When the spindle 1 moves axially, it can drive the tool holder 41 and the blade 42 to radially approach and contact the weld to be repaired by utilizing the principle of displacement of the tilt angle of the first inclined surface 12 and the second inclined surface 411. The spindle 1, the outer base sleeve 3 and the tool assembly 4 rotate together (except for the positioning sleeve 2, which does not move, the other parts rotate together), so that the blade 42 can process the annular weld 03 and / or process the weld bevel.

[0037] Specifically, the spindle 1 is fixed with a spring sleeve 6, and a compression spring 7 is provided in the spring sleeve 6. The compression spring 7 presses against the spring sleeve 6 and the outer base sleeve 3 respectively, so that the spindle 1 maintains the potential energy to return to the initial state. After the axial force of the external machining equipment on the spindle 1 is removed, the spindle 1 can be automatically driven to return to the initial state under the action of the compression spring 7.

[0038] Specifically, a first stop step 13 is provided on the outer side of the main spindle 1, and a second stop step 31 is provided on the inner side of the outer base sleeve 3. In the initial state, the first stop step 13 axially abuts against the second stop step 31 to position the main spindle 1.

[0039] Specifically, the spring sleeve 6 is fixed to the spindle 1 by the first nut screw 81, the tool holder 41 is fixed to the blade 42 by the second nut screw 82, the outer base sleeve 3 is installed to the spindle 1 by the third nut screw 83 (not fully locked, so that the spindle 1 can move relative to the axis), and the spring piece 43 is fixed to the outer base sleeve 3 by the fourth nut screw 84.

[0040] Specifically, the outer side of the main shaft 1 is provided with a guide groove 14 arranged parallel to the axial direction, and the outer base sleeve 3 is provided with a guide pin (i.e. the third nut screw 83) embedded in the guide groove 14, which plays a role in guiding axial movement and limiting rotation direction so that they rotate together.

[0041] Specifically, the outer side of the positioning sleeve 2 is provided with an annular groove 21, and a retaining spring 22 is embedded in the annular groove 21. The retaining spring 22 limits the axial movement of the outer base sleeve 3.

[0042] Specifically, the tool holder 41 is provided with a locking groove 412, and the end of the spring piece 43 is bent and embedded in the locking groove 412; the tool assembly 4 also includes a clamping block 44 and a locking screw 45, the locking screw 45 fixes the clamping block 44 to the tool holder 41, and the clamping block 44 presses down on the spring piece 43.

[0043] Specifically, a positioning protrusion 23 is provided on the outer side of the positioning sleeve 2, which is used to position the tube sheet 01 against the end face.

[0044] Specifically, the end of the spindle 1 is provided with a Morse taper shank 15 for connecting to peripheral machining equipment.

[0045] Specifically, the end of the spindle 1 is provided with a chip discharge port 16 that connects to the tool holder groove 11, which is used to discharge the waste chips cut from the weld.

[0046] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0048] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A deep penetration weld seam removal tool characterized by: The utility model relates to a kind of welding seam repair tool, including main shaft (1), positioning sleeve (2), outer base sleeve (3) and tool assembly (4), positioning sleeve (2) coaxially installed at the end of outer base sleeve (3), for coaxial insertion locking in peripheral orifice; Bearing (5) is arranged between outer base sleeve (3) and positioning sleeve (2), so that the relative rotation of the two can be arranged; Main shaft (1) passes through outer base sleeve (3) and positioning sleeve (2) coaxially, and rotates with outer base sleeve (3), and main shaft (1) can be axially moved within a preset range relative to outer base sleeve (3);Main shaft (1) is provided with tool holder groove (11) along the length direction, and first inclined surface (12) is arranged in tool holder groove (11); Tool assembly (4) includes tool holder seat (41), blade (42) and spring piece (43), blade (42) is fixed to tool holder seat (41), second inclined surface (411) is arranged in tool holder seat (41), and both ends of spring piece (43) are connected with outer base sleeve (3) and tool holder seat (41) respectively, so that second inclined surface (411) keeps in close contact with first inclined surface (12);Main shaft (1) is axially moved to drive tool holder seat (41) and blade (42) to be close to / away from the repaired weld radially.

2. A deep penetration weld seam removal tool according to claim 1, characterized in that: Spring sleeve (6) is fixed to main shaft (1), compression spring (7) is arranged in spring sleeve (6), and compression spring (7) is tightly pressed against spring sleeve (6) and outer base sleeve (3) respectively, so that main shaft (1) keeps reset to the potential energy of initial state.

3. A deep hole weld seam removal tool according to claim 2, characterized in that: First stop step (13) is arranged on the outer side of main shaft (1), and second stop step (31) is arranged on the inner side of outer base sleeve (3), and in initial state, first stop step (13) is axially abutted against second stop step (31).

4. A deep hole weld seam removal tool according to claim 2, characterized in that: Spring sleeve (6) and main shaft (1) are connected by machine screw, tool holder seat (41) and blade (42) are connected by machine screw, outer base sleeve (3) and main shaft (1) are connected by machine screw, and spring piece (43) and outer base sleeve (3) are connected by machine screw.

5. A deep hole weld seam removal tool according to claim 1, characterized in that: Guide groove (14) is arranged on the outer side of main shaft (1) along the axial direction, and outer base sleeve (3) is provided with guide pin embedded in guide groove (14).

6. A deep hole weld seam removal tool according to claim 1, characterized in that: Ring groove (21) is arranged on the outer side of positioning sleeve (2), and snap spring (22) is embedded in ring groove (21), and snap spring (22) limits the axial direction of outer base sleeve (3).

7. A deep hole weld seam removal tool according to claim 1 characterized by: Locking groove (412) is arranged in tool holder seat (41), and the end of spring piece (43) is bent and embedded in locking groove (412);Tool assembly (4) further includes pressing block (44) and locking screw (45), locking screw (45) fixes pressing block (44) to tool holder seat (41), and pressing block (44) presses spring piece (43).

8. A deep hole weld seam removal tool according to claim 1 characterized by: Positioning convex ring (23) is arranged on the outer side of positioning sleeve (2).

9. A deep hole weld seam removal tool according to claim 1 characterized by: Morse taper shank (15) is arranged at the end of main shaft (1).

10. A deep hole weld seam removal tool according to claim 1 characterized by: Chip removal port (16) is arranged at the end of main shaft (1) and communicates with tool holder groove (11).

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