Adjustable deep hole welding seam removing tool

Abstract

The invention relates to the technical field of petrochemical pipeline machining, in particular to an adjustable 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 can machine a deep hole welding seam structure with a certain depth, remove a defective welding seam and machine a welding seam groove at the same time, compared with a method for removing the welding seam through polishing, the efficiency and quality are greatly improved, the quality of the repaired welding seam can be guaranteed, and therefore the product quality is improved, the distance between the blade and the positioning sleeve can be adjusted, and the production efficiency is improved. Therefore, welding seam machining of different depths can be adapted.

Description

Technical Field

[0001] The present invention relates to the technical field of petrochemical pipeline processing, specifically to a tool for removing the weld bead of a deep-hole weld and machining the groove of a deep-hole weld, and more specifically to an adjustable deep-hole weld removal tool. Background Art

[0002] In the fields of chemical industry, petroleum, medicine, atomic energy, and nuclear industry, heat exchangers are widely used, among which shell-and-tube heat exchangers are the most commonly used. In the design, manufacturing, etc. of shell-and-tube heat exchangers, the quality of the welding between the heat exchange tubes and the tube holes on the tube sheet determines the quality and service life of the heat exchanger. In a conventional welding structure, there are gaps between the tube holes and the heat exchange tubes, which are prone to problems such as crevice corrosion and overheating. Inner hole welding can overcome the above problems, and long-distance inner hole welding is usually called deep-hole welding. During equipment manufacturing, after the deep-hole welding of the tube holes on the tube sheet and the heat exchange tubes is completed, it is necessary to detect and flaw detect the welds of the deep-hole welds between the heat exchange tubes and the tube sheet to check whether the deep-hole welds are qualified. If there are problems with the welds, repairs are required. The traditional repair method is to use an internal grinder to grind and remove the welds and then weld them back again. Although the above repair method can repair the welds, due to the excessive depth of the welds, the grinding is difficult, the efficiency is low, it is difficult to ensure the grinding quality, and there may even be a phenomenon of grinding in the wrong position. Therefore, the quality of the repaired welds cannot be guaranteed, and the product quality is also reduced. Summary of the Invention

[0003] In view of all or part of the above technical problems existing in the prior art, the present invention provides an adjustable deep-hole weld removal tool.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] Provide an adjustable deep-hole weld removal tool, including a main shaft, a positioning sleeve, an outer base sleeve, and a tool assembly. The outer base sleeve includes a fixed sleeve and a sliding sleeve. The sliding sleeve is coaxially inserted through the fixed sleeve. The positioning sleeve is coaxially installed at the end of the fixed sleeve for coaxially inserting and locking at the peripheral hole opening;

[0006] A bearing is provided between the fixed sleeve and the positioning sleeve to enable relative rotation therebetween;

[0007] The main shaft coaxially passes through the outer base sleeve and the positioning sleeve, and the main shaft, the sliding sleeve, and the fixed sleeve rotate together. The main shaft can axially move relative to the outer base sleeve within a preset range; a tool holder groove is provided along the length direction of the main shaft, and the tool holder groove is provided with a first inclined surface;

[0008] The tooling component includes a tool holder seat, a blade, and a shrapnel. The blade is fixed to the tool holder seat. The tool holder seat is provided with a second inclined surface. The two ends of the shrapnel are respectively connected to a sliding sleeve and the tool holder seat to keep the second inclined surface in close contact with the first inclined surface. The axial movement of the main shaft drives the tool holder seat and the blade to move radially closer to / away from the weld to be repaired.

[0009] The sliding sleeve is installed between the fixed sleeve in a loosenable and tightenable manner, so that the sliding sleeve can be axially adjusted by a preset distance and then locked to the fixed sleeve to adjust the distance between the blade and the positioning sleeve.

[0010] As a further optional solution, a spring sleeve is fixed to the main shaft. A compression spring is arranged in the spring sleeve. The compression spring respectively abuts against the spring sleeve and the sliding sleeve to enable the main shaft to maintain the potential energy for resetting to the initial state.

[0011] As a further optional solution, a first stop step is arranged on the outer side of the main shaft, and a second stop step is arranged on the inner side of the sliding sleeve. In the initial state, the first stop step axially abuts against the second stop step.

[0012] As a further optional solution, the spring sleeve and the main shaft, the tool holder seat and the blade, the sliding sleeve and the main shaft, the shrapnel and the sliding sleeve, and the fixed sleeve and the sliding sleeve are respectively installed via machine screws.

[0013] As a further optional solution, a guiding groove arranged axially is provided on the outer side of the main shaft, and a guide pin embedded in the guiding groove is provided on the sliding sleeve.

[0014] As a further optional solution, an annular groove is provided on the outer side of the positioning sleeve, and a snap ring is embedded in the annular groove to axially limit the fixed sleeve.

[0015] As a further optional solution, a locking groove is provided on the tool holder seat, and the end of the shrapnel is bent and embedded in the locking groove. The tooling component further includes a pressing block and a locking screw. The locking screw fixes the pressing block to the tool holder seat, and the pressing block presses the shrapnel.

[0016] As a further optional solution, a positioning convex ring is provided on the outer side of the positioning sleeve.

[0017] As a further optional solution, a Morse taper shank is provided at the end of the main shaft.

[0018] As a further optional solution, a chip removal port communicating with the tool holder groove is provided at the end of the main shaft.

[0019] The beneficial effects of the present invention:

[0020] An adjustable deep-hole welding seam removal tool of the present invention, when in use, axially adjusts the sliding sleeve according to the distance between the welding seam and the tube sheet (welding seam depth). Since the elastic piece is connected to the sliding sleeve, the entire tool assembly also follows the axial adjustment, that is, the distance between the blade and the positioning sleeve can be adjusted, so as to adapt to the processing of welding seams with different depths. Fix the positioning sleeve at the orifice of the deep-hole welding seam structure. When the peripheral machining equipment drives the main shaft and the main shaft moves axially, using the principle of the inclination angle displacement of the first inclined surface and the second inclined surface, it can drive the tool holder seat and the blade to radially approach and contact the repaired welding seam. The main shaft, the outer base sleeve and the tool assembly rotate together, so that the blade processes the welding seam.

[0021] Compared with the prior art, it solves the problem that deep-hole welding seams are difficult to repair, can avoid the problems of large grinding difficulty, low efficiency and inaccurate grinding size, ensures the size of the welding seam groove after repair, and thus ensures the quality of deep-hole welding seams.

[0022] This deep-hole welding repair tool has a simple structure and is easy to operate. By adjusting the size of the positioning sleeve and the position of the sliding sleeve, the repair of deep-hole welding with different hole diameters, different depths and different heat exchange tube thicknesses can be realized, and it has the characteristic of a wide repair range; while processing and removing the problematic welding seam, it processes a groove with required size, realizing the function of removing the welding seam and processing the groove simultaneously, and can more accurately control the size and shape of the groove, with the characteristic of high precision. Brief Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of an adjustable deep-hole welding seam removal tool in the embodiment.

[0024] Figure 2 It is a schematic structural diagram when an adjustable deep-hole welding seam removal tool in the embodiment is combined with a deep-hole welding seam structure.

[0025] Figure 3 It is a schematic diagram of the spring sleeve in the embodiment.

[0026] Figure 4 It is a schematic diagram of the fixed sleeve in the embodiment.

[0027] Figure 5 It is a schematic diagram of the sliding sleeve in the embodiment.

[0028] Figure 6 It is a schematic diagram of another perspective of the sliding sleeve in the embodiment.

[0029] Figure 7 It is a schematic diagram of the positioning sleeve in the embodiment.

[0030] Figure 8 It is a top view of the main shaft in the embodiment.

[0031] Figure 9 Side view of the main shaft in the embodiment, showing the tool holder groove and chip removal port in the middle part.

[0032] Reference numerals:

[0033] Tube sheet 01, tube hole 011, short cylinder 012, heat exchange tube 02, weld 03;

[0034] Main shaft 1, tool holder groove 11, first inclined surface 12, first stop step 13, guide groove 14, Morse taper shank 15, chip removal port 16;

[0035] Positioning sleeve 2, annular groove 21, snap ring 22, positioning convex ring 23;

[0036] Outer base sleeve 3, second stop step 31, fixing sleeve 32, sliding sleeve 33;

[0037] Tool assembly 4, tool holder seat 41, second inclined surface 411, locking groove 412, blade 42, elastic piece 43, pressing block 44, locking screw 45;

[0038] Bearing 5, spring sleeve 6, compression spring 7;

[0039] First machine screw 81, second machine screw 82, third machine screw 83, fourth machine screw 84, fifth machine screw 85. Specific implementation manner

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0041] An adjustable deep-hole weld removal tool in this embodiment, as Figures 1 to 9 shown, the tube sheet 01, the heat exchange tube 02, and the weld 03 form a deep-hole weld structure. A short cylinder 012 extends inwards at the tube hole 011 of the tube sheet 01, and the heat exchange tube 02 is connected to the short cylinder 012 to form a weld 03 connection. This tool is used to remove the problematic weld and simultaneously machine a weld groove. The tool includes a main shaft 1, a positioning sleeve 2, an outer base sleeve 3, and a tool assembly 4. The outer base sleeve 3 includes a fixing sleeve 32 and a sliding sleeve 33. The sliding sleeve 33 is coaxially inserted through the fixing sleeve 32 and passes out from the rear end of the fixing sleeve 32. The outer wall of the sliding sleeve 33 fits against the inner wall of the fixing sleeve 32 and is fixed to each other. The positioning sleeve 2 is coaxially installed inside the front end of the fixing sleeve 32 and passes out from the front end of the fixing sleeve 32. The positioning sleeve 2 is used to be coaxially inserted and locked in the tube hole 011, that is, the positioning sleeve 2 is fixed in the tube hole 011 during use and cannot move axially or rotate.

[0042] In this embodiment, a bearing 5 is provided between the fixed sleeve 32 and the positioning sleeve 2 so that the fixed sleeve 32 can rotate relative to the positioning sleeve 2, and the bearing 5 is a flat thrust bearing.

[0043] The main shaft 1 coaxially passes through the outer base sleeve 3 and the positioning sleeve 2, and the main shaft 1, the sliding sleeve 33 and the fixed sleeve 32 rotate together. The main shaft 1 can axially move relative to the outer base sleeve 3 within a preset range. The main shaft 1 is provided with a tool holder groove 11 along its length direction, and the tool holder groove 11 is provided with a first inclined surface 12.

[0044] The tool assembly 4 includes a tool holder base 41, a cutting blade 42 and a spring piece 43. The cutting blade 42 is fixed to the tool holder base 41. The tool holder base 41 is provided with a second inclined surface 411. The two ends of the spring piece 43 are respectively connected to the sliding sleeve 33 and the tool holder base 41. The second inclined surface 411 is kept in contact with the first inclined surface 12 by the elastic force of the spring piece 43. When the main shaft 1 moves axially, the tool holder base 41 and the cutting blade 42 are driven to radially approach / away from the weld to be repaired.

[0045] The sliding sleeve 33 is installed between the fixed sleeve 32 in a releasable manner so that the sliding sleeve 33 can be axially adjusted by a preset distance and then locked to the fixed sleeve 32 to adjust the distance between the cutting blade 42 and the positioning sleeve 2. Before use, the sliding sleeve 33 can be axially adjusted according to the distance (weld depth) between the weld 03 and the tube sheet 01. Since the spring piece 43 is connected to the sliding sleeve 33, the entire tool assembly 4 also follows the axial adjustment, that is, the distance between the cutting blade 42 and the positioning sleeve 2 (i.e., the distance between the cutting blade and the end face of the tube sheet) can be adjusted, so as to adapt to the processing of welds with different depths.

[0046] During use, the positioning sleeve 2 is fixed to the tube hole 011, and the peripheral machining equipment drives the main shaft 1 axially and rotationally. When the main shaft 1 moves axially, by using the principle of the inclination angle displacement between the first inclined surface 12 and the second inclined surface 411, the tool holder base 41 and the cutting blade 42 can be driven to radially approach and contact the weld to be repaired. The main shaft 1, the outer base sleeve 3 and the tool assembly 4 rotate together (except that the positioning sleeve 2 does not move and other parts rotate together), so that the cutting blade 42 processes the circumferential weld 03 and / or processes a weld groove.

[0047] Specifically, a spring sleeve 6 is fixed to the main shaft 1, and a compression spring 7 is provided in the spring sleeve 6. The compression spring 7 abuts against the spring sleeve 6 and the sliding sleeve 33 respectively, so that the main shaft 1 maintains the potential energy to return to the initial state. After the axial force of the external machining equipment on the main shaft 1 is removed, under the action of the compression spring 7, the main shaft 1 can be automatically driven to reset.

[0048] Specifically, a first stop step 13 is provided on the outer side of the main shaft 1, and a second stop step 31 is provided on the inner side of the sliding sleeve 33. In the initial state, the first stop step 13 axially abuts against the second stop step 31 to position the main shaft 1.

[0049] Specifically, the spring sleeve 6 is fixed to the main shaft 1 via the first machine screw 81, the tool holder 41 is fixed to the cutting blade 42 via the second machine screw 82, the sliding sleeve 33 is installed on the main shaft 1 via the third machine screw 83 (not fully tightened so that the main shaft 1 can move axially relative to it), the elastic piece 43 is fixed to the sliding sleeve via the fourth machine screw 84, and the fixing sleeve 32 is fixed to the sliding sleeve 33 via the fifth machine screw 85.

[0050] Specifically, a guide groove 14 arranged parallel to the axial direction is provided on the outer side of the main shaft 1, and the sliding sleeve 33 is provided with a guide pin (i.e., the third machine screw 83) embedded in the guide groove 14, which plays a role in guiding the axial movement and limits the rotation direction to enable co-rotation.

[0051] Specifically, an annular groove 21 is provided on the outer side of the positioning sleeve 2, and a snap ring 22 is embedded in the annular groove 21, and the snap ring 22 axially positions the fixing sleeve 32.

[0052] Specifically, the tool holder 41 is provided with a locking groove 412, and the end of the elastic piece 43 is bent and embedded in the locking groove 412; the tool assembly 4 further includes a pressing block 44 and a locking screw 45, the locking screw 45 fixes the pressing block 44 to the tool holder 41, and the pressing block 44 presses the elastic piece 43.

[0053] Specifically, a positioning convex ring 23 is provided on the outer side of the positioning sleeve 2, which is used to abut against the end face of the tube sheet 01 for positioning.

[0054] Specifically, the end of the main shaft 1 is provided with a Morse taper shank 15 for connecting with peripheral machining equipment.

[0055] Specifically, the end of the main shaft 1 is provided with a chip discharge port 16 communicating with the tool holder groove 11, which is used to discharge the waste chips cut out from the weld seam.

[0056] In this embodiment, the elastic piece 43 is made of spring steel sheet material, one end is bent by 100°, connected to the locking groove 412 of the tool holder 41, and the other end is bent by 9°, connected to the sliding sleeve 33.

[0057] The pressing block 44 is in the shape of a "7", with an opening on it, is arranged on the outer side above the tool holder 41, and is fixed on the tool holder 41 through the locking screw 45 passing through the opening.

[0058] The cutting blade 42 is made of high-speed steel, the cutting edge is in the shape of a weld groove, the length is 0.2 mm smaller than the notch of the locking groove 412, and the width is the same as the width of the tool holder 41.

[0059] The lower part of the tool holder seat 41 is inclined at a certain angle to form a second inclined surface 411, and the angle is the same as that of the first inclined surface 12 of the tool holder groove 11 of the main shaft 1. Two notches are provided above the tool holder seat 41. One notch is connected to the elastic piece, and the other notch is used for installing the blade. A blind hole thread is provided in the middle position between the two notches for installing the pressing block 44 and the locking screw 45. The right end of the tool holder seat 41 is provided with a thread for installing a machine screw to fasten the blade.

[0060] One end of the main shaft 1 is a Morse taper shank 15. A tool holder groove 11 is opened along the center line at the right end of the main shaft 1. The cross-section of the groove is a right triangle, where the hypotenuse is located inside the main shaft, the long right side is parallel to the normal of the outer circle of the main shaft, and the short right side is parallel to the normal of the right end face. The width of the groove is 0.1 mm larger than the width of the tool holder seat. The groove is inclined at a certain angle, and the inclination angle is the same as that of the tool holder seat; a thread is provided at a position slightly to the left of the middle, and the thread specification is the same as the inner hole thread of the spring sleeve.

[0061] The positioning sleeve 2 is provided with an annular groove 21. The outer diameter of the annular groove 21 is 0.2 mm smaller than the inner diameter of the snap ring 22. A positioning convex ring 23 is provided, and the diameter of the positioning convex ring 23 is 4 mm larger than the diameter of the pipe hole 011. The outer diameter of the positioning sleeve 1 inserted into the cylinder body of the pipe hole is 0.1 mm smaller than the diameter of the pipe hole, and a 1.5×20° chamfer is provided at the end as a guide.

[0062] The fixed sleeve 32 is a hollow cylindrical shape, provided with 1 inner annular groove on 4 levels of steps. Among them, the 1st and 2nd level steps are matched with the sliding sleeve. The inner diameter of the 3rd level step is 4 mm smaller than the inner diameter of the bearing, and the inner diameter of the 4th level step is 0.2 mm smaller than the outer diameter of the bearing. The inner annular groove is used for installing the inner snap ring. 3 threaded hole through holes are evenly distributed along the center line direction in the middle of the 1st level step, and the adjacent threaded holes differ by 120°.

[0063] The sliding sleeve 33 is arranged inside the fixed sleeve 32. The outer circular surface is matched with the fixed sleeve 32, and the inner circular surface is matched with the main shaft 1. The outer circular surface is provided with 3 grooves, evenly distributed along the center line, spaced 120°. The first step is provided with a threaded through hole for installing a machine screw to fasten the spring piece. Another threaded through hole is provided at a position 180° different from the first threaded hole for installing a limit machine screw, and the center line of the second threaded hole is not collinear with the center line of the first threaded hole; a through square hole is opened on the right end face of the sliding sleeve 33, and the spring piece is installed in the square hole.

[0064] The sliding sleeve 33 is installed in cooperation with the main shaft 1. After adjusting the orientation, the third machine screw 83 is aligned with the guide groove 14, and the depth of the third machine screw 83 is adjusted to ensure that the sliding sleeve 33 can move within the range of the guide groove 14. The third machine screw 83 is a 2-level screw, that is, 2 machine screws are installed to prevent the screws from loosening.

[0065] Insert 7 compression springs onto the main shaft 1 and into the sliding sleeve 33. Install the spring sleeve 6. The threaded end of the spring sleeve 6 is threadedly connected to the main shaft 1, and the other end of the spring sleeve 1 has a clearance fit with the inner hole of the sliding sleeve 32. Adjust the position of the compression spring 7 so that the compression spring 7 is in a slightly compressed state, and align the threaded hole of the spring sleeve 6 with the groove on the thread of the main shaft 1. Install the first machine screw 81 in the threaded hole on the spring sleeve 6 to fasten the threaded hole.

[0066] Install the positioning sleeve 2 in cooperation with the fixed sleeve 32, and install the snap ring 22 in the inner ring groove of the fixed sleeve 32 to axially fix the fixed sleeve 32 while allowing it to rotate circumferentially. The inner circle of the fixed sleeve 32 is installed in cooperation with the sliding sleeve 33, and the inner hole of the positioning sleeve 2 has a clearance fit with the main shaft 1. Adjust the positions of the three threaded holes of the fixed sleeve 32 so that the threaded holes are aligned with the three slots parallel to the axis on the sliding sleeve 33. Adjust the relative position of the fixed sleeve 32 and the sliding sleeve 33 according to the depth of the repair weld, and then fasten with the fifth machine screw 85.

[0067] Utilize the principle of inclined angle displacement. ① Adjust the position of the cutting blade 42 and connect it to the machining equipment through the Morse taper shank 15. ② Insert the positioning sleeve 2 into the hole to be machined and use the machining equipment to apply pressure to squeeze forward. After being pressed, the positioning sleeve 2 is fixed in the tube hole 011 of the tube sheet 01 (it cannot move axially or rotate), and other mechanisms can rotate, and the positioning function takes effect. ③ Continue to apply pressure to the main shaft 1. The main shaft 1 moves to the right, and the tool holder seat 41, the elastic piece 43, the sliding sleeve 33, and the fixed sleeve 32 as a whole move to the left relative to the main shaft 1 simultaneously (axially stationary relative to the positioning sleeve 15). The spring sleeve 6 is fixed to the main shaft 1. As the main shaft 1 moves to the right, the compression spring 7 is compressed, and the cutting blade 42 slowly extends radially towards the weld, takes the cut, and the machining depth increases with the increase of the pressure until the main shaft 1 moves to the limited position. ④ After the machining is completed, release the pressure on the main shaft 1. The compressed compression spring 7 drives the spring sleeve 6 and the main shaft 1 to move to the left, and at the same time, the tool holder seat 41 etc. are reset during the recovery of the compression spring 7. Throughout the machining process, the distance from the step of the positioning sleeve 2 to the cutting blade 42 remains unchanged, thus ensuring the position accuracy of the repair weld.

[0068] Figure 2 Among them, the specifications of the heat exchange tubes with welds that the repair tool can machine are: inner hole 20 - 80 mm, wall thickness 1 - 10 mm, and machining depth 30 - 300 mm. The part materials and bolts are medium carbon steel, the springs are spring steel, and the cutting blades are cemented carbide.

[0069] In the description of the present invention, obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0070] Accordingly, the 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 represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0071] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "in", "upper", "lower", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0072] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An adjustable deep hole weld removal tool, characterized by: The invention comprises a main shaft (1), a positioning sleeve (2), an outer base sleeve (3) and a tool assembly (4); the outer base sleeve (3) comprises a fixed sleeve (32) and a sliding sleeve (33); the sliding sleeve (33) is coaxially inserted into the fixed sleeve (32); the positioning sleeve (2) is coaxially installed at the end of the fixed sleeve (32) and is used for being coaxially inserted and locked in the peripheral opening; A bearing (5) is arranged between the fixing sleeve (32) and the positioning sleeve (2) so that the two can rotate relative to each other; The main shaft (1) coaxially passes through the outer base sleeve (3) and the positioning sleeve (2), and the main shaft (1), the sliding sleeve (33) and the fixed sleeve (32) rotate together, and the main shaft (1) can move axially within a preset range relative to the outer base sleeve (3); the main shaft (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); The tool assembly (4) comprises a tool holder seat (41), a blade (42) and a spring sheet (43); the blade (42) is fixed to the tool holder seat (41); the tool holder seat (41) is provided with a second inclined surface (411); two ends of the spring sheet (43) are respectively connected to the sliding sleeve (33) and the tool holder seat (41) so that the second inclined surface (411) remains in contact with the first inclined surface (12); the spindle (1) moves axially to drive the tool holder seat (41) and the blade (42) to move radially toward / away from the weld to be repaired; The sliding sleeve (33) and the fixed sleeve (32) can be loosely mounted so that the sliding sleeve (33) can be adjusted along the axial direction by a preset distance and then locked to the fixed sleeve (32) to adjust the distance between the blade (42) and the positioning sleeve (2).

2. The adjustable deep hole welding seam removal tool according to claim 1, characterized in that: A spring sleeve (6) is fixed to the main shaft (1), a compression spring (7) is arranged in the spring sleeve (6), and the compression spring (7) respectively presses against the spring sleeve (6) and the sliding sleeve (33) to keep the main shaft (1) in a potential energy of returning to an initial state.

3. The adjustable deep hole welding seam removal tool according to claim 2, characterized in that: A first stop step (13) is arranged on the outer side of the main shaft (1), and a second stop step (31) is arranged on the inner side of the sliding sleeve (33). In an initial state, the first stop step (13) axially abuts against the second stop step (31).

4. The adjustable deep hole welding seam removal tool according to claim 2, characterized in that: The spring sleeve (6) and the main shaft (1), the tool holder (41) and the blade (42), the sliding sleeve (33) and the main shaft (1), the spring sheet (43) and the sliding sleeve (33), and the fixed sleeve (32) and the sliding sleeve (33) are respectively installed via machine screws.

5. The adjustable deep hole welding seam removal tool according to claim 1, characterized in that: The outer side of the main shaft (1) is provided with a guide groove (14) arranged along the axial direction, and the sliding sleeve (33) is provided with a guide pin embedded in the guide groove (14).

6. The adjustable deep hole welding seam removal tool according to claim 1, characterized in that: An annular groove (21) is arranged on the outer side of the positioning sleeve (2), a retaining spring (22) is embedded in the annular groove (21), and the retaining spring (22) limits the axial position of the fixing sleeve (32).

7. The adjustable deep hole welding seam removal tool according to claim 1, characterized in that: The tool holder seat (41) is provided with a locking groove (412), and the end of the spring sheet (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), and the locking screw (45) fixes the clamping block (44) to the tool holder seat (41), and the clamping block (44) presses the spring sheet (43).

8. The adjustable deep hole welding seam removal tool according to claim 1, characterized in that: A positioning convex ring (23) is arranged on the outer side of the positioning sleeve (2).

9. The adjustable deep hole welding seam removal tool according to claim 1, characterized in that: A Morse taper shank (15) is provided at the end of the main shaft (1).

10. The adjustable deep hole welding seam removal tool according to claim 1, characterized in that: The end of the main shaft (1) is provided with a chip removal opening (16) connected to the tool holder groove (11).

Images