Drill bit welding equipment

Abstract

The present application relates to the field of drill bit welding equipment, and in particular to a drill bit welding equipment; comprising a welding platform, a clamping unit and a welding unit; the clamping unit comprises a first clamping cylinder and a second clamping cylinder; the first clamping cylinder is rotatably connected to the welding platform, and the drill bit assembly is detachably arranged on the first clamping cylinder; the second clamping cylinder is rotatably connected to the welding platform, and can slide along the length direction of the welding platform, and the first clamping cylinder and the second clamping cylinder cooperate with each other to form a fixed space for the drill bit assembly; the welding unit is arranged on the welding platform, and the welding unit is used to weld the drill bit; after welding the drill bit body and one side of the cemented carbide sheet, the second clamping cylinder is rotated, and the rotation of the second clamping cylinder drives the first clamping cylinder to move, so as to realize the purpose of flipping the drill bit body and the cemented carbide sheet, so as to facilitate the comprehensive welding of the drill bit body and the cemented carbide sheet, and reduce the process that requires the staff to flip.

Description

Technical Field

[0001] The present application relates to the field of drill bit welding equipment, and in particular to a drill bit welding equipment. Background Art

[0002] Drilling operations are often performed in mechanical equipment processing. The general steps for drilling operations on mechanical equipment are: first install the drill bit on the mounting shaft of the drilling equipment, then drive the drilling equipment to move, the drilling equipment shaft rotates to drive the drill bit to move, and then the drilling equipment drives the drill bit close to the processing object, the rotating drill bit contacts the processing object, and the drilling operation on the processing object is completed.

[0003] In the related art, in order to improve the drilling hardness and drilling efficiency of the drill bit, the drill bit is often processed as follows: a mounting groove is machined on the head of the drill bit body, and then a hard alloy sheet is fixed in the mounting groove by riveting, and finally the drill bit body and the hard alloy sheet are fixed by manual welding.

[0004] like Figure 1 As shown, the drill bit assembly in the related art includes a drill bit body and a cemented carbide sheet; a mounting groove is provided at the end of the drill bit body, and the cemented carbide sheet is arranged in the mounting groove. In addition, in order to improve the installation and fixing effect of the drill bit body and the cemented carbide sheet, the mounting groove and the cemented carbide sheet are both closed.

[0005] With respect to the above-mentioned related technologies, there are the following technical defects: when the drill body and the cemented carbide sheet are welded, in order to fully weld the drill body and the cemented carbide sheet, after welding the drill body and one side of the cemented carbide, it is necessary to manually flip the combination of the drill body and the cemented carbide sheet, which increases the welding process of the drill body and the cemented carbide sheet, thereby reducing the welding efficiency of the drill bit. Summary of the invention

[0006] In order to improve the welding efficiency of drill bits, the present application provides a drill bit welding device.

[0007] The present application provides a drill bit welding device, which adopts the following technical solution:

[0008] A drill bit welding device comprises a welding platform, a clamping unit and a welding unit;

[0009] The clamping unit includes a first clamping cylinder and a second clamping cylinder;

[0010] The first clamping cylinder is rotatably connected to the welding platform, and the drill assembly is detachably arranged on the first clamping cylinder;

[0011] The second clamping tube is rotatably connected to the welding platform and can slide along the length direction of the welding platform. The first clamping tube and the second clamping tube cooperate with each other to form a fixed space for the drill bit to fit.

[0012] The second clamping tube is provided with a welding groove which matches with the welding point of the drill bit body;

[0013] The welding unit is arranged on the welding platform, and is used for welding the drill bit.

[0014] By adopting the above technical scheme, the drill assembly is installed on the first clamping cylinder, the second clamping cylinder is moved, the second clamping cylinder is close to the first clamping cylinder, the drill assembly is wrapped in the cavity formed by the first clamping cylinder and the second clamping cylinder, the welding unit is driven, the welding unit extends into the welding groove, and the drill body and the cemented carbide sheet are welded. After the drill body and one side of the cemented carbide sheet are welded, the second clamping cylinder is rotated, and the rotation of the second clamping cylinder drives the first clamping cylinder to move, so as to achieve the purpose of flipping the drill body and the cemented carbide sheet, which is convenient for realizing the comprehensive welding of the drill body and the cemented carbide sheet, reduces the process that requires the staff to flip, and improves the efficiency of the drill bit welding process; in addition, the clamping assembly is set to a cylindrical shape. On the one hand, the gas generated by the welding of the drill body and the cemented carbide sheet is gathered in the cylinder to reduce the harm to the staff. On the other hand, the residence time of the hot air flow generated by the welding is increased, thereby increasing the quality of the drill bit welding.

[0015] Optionally, it further includes a driving unit, wherein the driving unit includes a rotating component and a sliding component;

[0016] The sliding assembly includes a sliding cylinder;

[0017] The sliding cylinder is arranged on the welding platform, the piston rod of the sliding cylinder is connected to the second clamping cylinder, and the movement direction of the sliding cylinder is the same as the length direction of the welding platform;

[0018] The rotating assembly is connected to the second clamping cylinder and is used to drive the second clamping cylinder to rotate.

[0019] By adopting the above technical solution, the sliding cylinder moves, and the sliding cylinder drives the second clamping cylinder to approach the first clamping cylinder, and the first clamping cylinder and the second clamping cylinder are pressed against each other, so as to achieve the purpose of wrapping the drill body and the cemented carbide sheet. The rotating assembly rotates to drive the second clamping cylinder to move, so as to achieve the purpose of rotating the unwelded side of the drill body and the cemented carbide sheet to the welding point position.

[0020] Optionally, the rotating assembly includes a rotating motor, a driving gear and a driven gear;

[0021] The rotating motor is arranged on the welding platform;

[0022] The driving gear is arranged on the output shaft of the rotating motor;

[0023] The driven gear is arranged on the second clamping cylinder, the driven gear is meshed with the driving gear, and the axial direction of the output shaft of the rotating motor is the same as the length direction of the welding platform.

[0024] By adopting the above technical solution, the rotary motor rotates, the rotation of the rotary motor drives the driving gear to move, the movement of the driving gear drives the driven gear to move, and the movement of the driven gear drives the second clamping cylinder to move, thereby achieving the purpose of automating the movement of the second clamping cylinder.

[0025] Optionally, the welding unit includes a welding machine, a moving assembly and a lifting assembly;

[0026] The moving assembly is arranged on the welding platform through the lifting assembly, and the lifting assembly is used to drive the moving assembly to move up and down, and can extend the welding head of the welding machine into the welding groove;

[0027] The welding machine is connected to the moving assembly, and the moving assembly is used to drive the welding machine to move along the length direction of the welding platform.

[0028] By adopting the above technical solution, the lifting component moves, the lifting component drives the mobile component to move, the mobile component drives the welding machine to move, when reaching the welding point, the lifting component moves to drive the mobile component to move, the mobile component drives the welding machine to move, the welding machine moves to the drill bit welding point to perform welding, during the welding process, the mobile component moves continuously, and the movement of the mobile component is estimated to be the same as the trajectory of the drill bit welding point, thereby realizing automatic welding of the drill bit.

[0029] Optionally, it further comprises a first fixing assembly for tightening the drill body and the side of the cemented carbide sheet;

[0030] The first top fixing assembly includes a first top fixing block and a first top fixing power member;

[0031] The first fixing block is arranged on the second clamping cylinder through the first fixing power member;

[0032] The second clamping tube is provided with a first fixing hole for the first fixing block to extend into, and the first fixing block can be tightly pressed against the side of the drill bit body;

[0033] The first fixing power member is used to drive the first fixing block to move.

[0034] By adopting the above technical solution, the first top fixing power piece moves, and the first top fixing power piece drives the first top fixing block to move. The first top fixing block extends from the first top fixing hole into the second clamping tube. The first top fixing block contacts the side of the drill bit, and presses the side of the drill bit body and the carbide sheet tightly, thereby reducing deformation during the welding process of the drill bit body and the carbide sheet and improving the welding quality of the drill bit.

[0035] Optionally, the lifting assembly includes a lifting bracket, a bearing frame and a driving member;

[0036] The lifting bracket is vertically arranged on the welding platform;

[0037] The carrier frame can be slidably disposed on the lifting bracket through the driving member;

[0038] The driving member is used to drive the carrier to move along the vertical direction of the lifting bracket;

[0039] The moving assembly is connected to the supporting frame.

[0040] By adopting the above technical solution, the driving member moves, the movement of the driving member drives the carrier frame to move, the carrier frame moves on the lifting bracket, and the movement of the carrier frame drives the moving component to move, thereby realizing the movement of the moving component in the vertical direction, and then realizing the movement of the welding machine in the vertical direction.

[0041] Optionally, the moving assembly includes a moving guide rail, a moving gear, a moving rack and a moving motor;

[0042] The movable guide rail is arranged on the carrier frame, and the length direction of the movable guide rail is the same as the length direction of the welding platform; the movable rack is arranged on the movable guide rail;

[0043] The moving gear is movably disposed on the moving guide rail, and the moving gear is meshed with the moving rack;

[0044] The moving motor is connected to the moving gear, and the moving motor is used to drive the moving gear to rotate.

[0045] By adopting the above technical solution, the mobile motor rotates, the movement of the mobile motor drives the movement of the mobile gear, the mobile gear moves on the mobile rack, the movement of the mobile gear drives the movement of the welding, and the purpose of driving the welding machine to move in the horizontal direction is achieved.

[0046] Optionally, it also includes a second fixing assembly for tightening the bottom of the drill bit assembly;

[0047] The second top fixing assembly includes a second top fixing block and a second top fixing power member;

[0048] The second top fixing block is arranged on the second clamping cylinder through the second top fixing power member.

[0049] The second clamping cylinder is provided with a second fixing hole for the second fixing block to extend into, and the second fixing block can be pressed tightly against the bottom of the drill bit assembly; the movement direction of the second fixing block is perpendicular to the movement direction of the first fixing block.

[0050] By adopting the above technical solution, the movement of the second top fixing power part drives the movement of the second top fixing block, and the second top fixing block extends from the second top fixing hole into the second clamping tube and is pressed tightly against the drill bit body. The drill bit body and the carbide sheet are pressed tightly, thereby reducing the phenomenon of vertical deformation of the drill bit body and the carbide sheet when welding the drill bit body and the carbide sheet, thereby improving the welding quality of the drill bit.

[0051] In summary, the present application includes at least one of the following beneficial technical effects:

[0052] 1. The present application achieves the purpose of flipping the drill bit body and the carbide sheet by rotating the second clamping cylinder, and the rotation of the second clamping cylinder drives the first clamping cylinder to move, so as to facilitate the comprehensive welding of the drill bit body and the carbide sheet, reduce the process that requires the staff to flip, and improve the efficiency of the drill bit welding process; in addition, the clamping assembly is set to be cylindrical, on the one hand, the gas generated by the welding of the drill bit body and the carbide sheet is gathered in the cylinder to reduce the harm to the staff, and on the other hand, the residence time of the hot air flow generated by the welding is increased, thereby improving the quality of the drill bit welding;

[0053] 2. In the present application, the first top fixing power member moves, the first top fixing power member drives the first top fixing block to move, the first top fixing block extends from the first top fixing hole into the second clamping tube, the first top fixing block contacts the side of the drill bit, presses the side of the drill bit body and the cemented carbide sheet tightly, reduces the deformation phenomenon during the welding process of the drill bit body and the cemented carbide sheet, and improves the welding quality of the drill bit;

[0054] 3. In the present application, the movement of the second top fixing power member drives the movement of the second top fixing block. The second top fixing block extends from the second top fixing hole into the second clamping tube and is pressed tightly against the drill bit body. The drill bit body and the carbide sheet are pressed tightly, thereby reducing the phenomenon of vertical deformation of the drill bit body and the carbide sheet when welding the drill bit body and the carbide sheet, thereby improving the welding quality of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a structural schematic diagram of the drill bit assembly processed in this application;

[0056] Figure 2 It is a structural schematic diagram of a drill bit welding device of the present application;

[0057] Figure 3 This is a structural schematic diagram of a drill bit welding device of the present application from another perspective;

[0058] Figure 4 This is a schematic diagram of the structure of hidden components of a drill welding device in this application;

[0059] Figure 5 yes Figure 4 Enlarged view of part A.

[0060] Reference numerals: 1, welding platform; 2, clamping unit; 21, first clamping cylinder; 22, second clamping cylinder; 221, welding groove; 222, first top fixing hole; 223, second top fixing hole; 3, welding unit; 31, welding machine; 32, moving assembly; 321, moving guide rail; 322, moving gear; 323, moving rack; 324, moving motor; 33, lifting assembly; 331, lifting bracket; 332, carrying frame; 333. Driving member; 4. Driving unit; 41. Rotating assembly; 411. Rotating motor; 412. Driving gear; 413. Driven gear; 42. Sliding cylinder; 5. First top fixing assembly; 51. First top fixing block; 52. First top fixing power member; 6. Second top fixing assembly; 61. Second top fixing block; 62. Second top fixing power member; 7. Drill assembly; 71. Drill body; 711. Mounting groove; 72. Carbide sheet. DETAILED DESCRIPTION

[0061] The following is combined with Figure 1-5 This application is described in further detail.

[0062] The embodiment of the present application discloses a drill bit welding device.

[0063] Reference Figure 2 A drill bit welding device includes a welding platform 1, a clamping unit 2, a welding unit 3, a driving unit 4, a first top fixing component 5 and a second top fixing component 6; the clamping unit 2 is installed on the welding platform 1, and the clamping unit 2 is used to clamp the drill bit assembly 7; the welding unit 3 is installed on the welding platform 1, and the welding unit 3 is located on both sides of the clamping unit 2 along the length direction of the welding platform 1, and the welding unit 3 is used to weld the drill bit assembly 7 in the clamping unit 2; the driving unit 4 is connected to the clamping unit 2, and the driving unit 4 is used to drive the clamping unit 2 to rotate, and to drive the clamping unit 2 to slide on the welding platform 1; the first top fixing component 5 and the second top fixing component 6 are connected to the clamping unit 2, and are used to tighten the drill bit assembly 7 on the clamping unit 2 to improve the welding quality of the drill bit assembly 7.

[0064] Reference Figure 1The clamping unit 2 includes a first clamping cylinder 21 and a second clamping cylinder 22; the first clamping cylinder 21 is rotatably connected to the welding platform 1, and the drill assembly 7 is detachably installed and fixed on the first clamping cylinder 21; the second clamping cylinder 22 is rotatably connected to the welding platform 1, and can slide along the length direction of the welding platform 1, and the first clamping cylinder 21 and the second clamping cylinder 22 cooperate with each other to form a fixed space for the drill assembly 7; the second clamping cylinder 22 is provided with a welding groove 221 that cooperates with the welding point of the drill assembly 7, and the setting of the welding groove 221 cooperates with the welding point of the drill assembly 7 and the cemented carbide sheet 72.

[0065] Reference Figure 2 The welding platform 1 includes a bearing plate, a first clamping frame and a second clamping frame; the first clamping frame is fixed to the bearing plate by bolts, and the first clamping cylinder 21 is rotatably connected to the first clamping frame; the second clamping frame is slidably connected to the bearing plate, and the second clamping cylinder 22 is rotatably connected to the second clamping frame, and the axial directions of the first clamping cylinder 21 and the second clamping cylinder 22 are the same.

[0066] Reference Figure 2 In order to improve the connection and tightening effect between the first clamping cylinder 21 and the second clamping cylinder 22, a fixing block is welded on one end of the second clamping cylinder 22 close to the first clamping cylinder 21, and a corresponding stabilizing hole matching the fixing block is opened on the first clamping cylinder 21. The fixing block extends into the stabilizing hole, and the fixing block is slidably connected to the first clamping cylinder 21.

[0067] Reference Figure 2 The driving unit 4 includes a rotating component 41 and a sliding component; the sliding component in the present application is preferably a sliding cylinder 42, but is not limited to the sliding cylinder 42, as long as it can achieve the sliding effect of driving the second clamping frame on the supporting plate; the base of the sliding cylinder 42 is fixed to the supporting plate by bolts, the piston rod of the sliding cylinder 42 is connected to the second clamping frame, and the movement direction of the sliding cylinder 42 is the same as the length direction of the supporting plate; the rotating component 41 is connected to the second clamping cylinder 22, and the rotating component 41 is used to drive the second clamping cylinder 22 to rotate.

[0068] Reference Figure 2 The rotating assembly 41 includes a rotating motor 411, a driving gear 412 and a driven gear 413; the housing of the rotating motor 411 is fixed to the second clamping frame by bolts; the driving gear 412 is fixed to the output shaft of the rotating motor 411 by a key connection; the driven gear 413 is fixed to the second clamping cylinder 22 by a fixed rotating rod, the driven gear 413 is meshed with the driving gear 412, and the axial direction of the output shaft of the rotating motor 411 is the same as the length direction of the welding platform 1.

[0069] Reference Figure 2 , Figure 3The welding unit 3 includes a welding machine 31, a moving assembly 32 and a lifting assembly 33; the moving assembly 32 is installed on the supporting plate through the lifting assembly 33, and the lifting assembly 33 is used to drive the moving assembly 32 to move up and down, and to achieve the purpose of extending the welding head of the welding machine 31 into the welding groove 221; the welding machine 31 is connected to the moving assembly 32, and the moving assembly 32 is used to drive the welding machine 31 to move along the welding position of the drill body 71 and the cemented carbide sheet 72.

[0070] Reference Figure 3 The lifting assembly 33 includes a lifting bracket 331, a carrier frame 332 and a driving member 333; the lifting bracket 331 is vertically fixed on the carrier plate by bolts; the carrier frame 332 is slidably mounted on the lifting bracket 331 by the driving member 333; the driving member 333 is used to drive the carrier frame 332 to move in the vertical direction of the lifting bracket 331;

[0071] Reference Figure 3 The driving member 333 of the present application is preferably a driving motor and a driving screw; the driving screw is rotatably connected to the lifting bracket 331, the axial direction of the driving screw is arranged in the vertical direction, the supporting frame 332 is threadedly connected to the driving screw, the housing of the driving motor is fixed to the lifting bracket 331 by bolts, and the output shaft of the driving motor is coaxially connected to the driving screw through a coupling.

[0072] Reference Figure 4 , Figure 5 The moving assembly 32 includes a moving guide rail 321, a moving gear 322, a moving rack 323 and a moving motor 324; the moving guide rail 321 is fixed to the carrier frame 332 by bolts, and the length direction of the moving guide rail 321 is the same as the length direction of the carrier plate; the moving rack 323 is welded to the moving guide rail 321; the moving gear 322 can be movably mounted on the moving guide rail 321 through a moving bracket, and the moving gear 322 is meshed with the moving rack 323; the moving motor 324 is connected to the moving gear 322 through a moving bracket, the casing of the moving motor 324 is fixed to the moving bracket by bolts, the output shaft of the moving motor 324 is connected to the moving gear 322, and the moving motor 324 is used to drive the moving gear 322 to rotate.

[0073] Reference Figure 2 , Figure 3 The first top fixing assembly 5 includes a first top fixing block 51 and a first top fixing power piece 52; the first top fixing block 51 is installed on the second clamping cylinder 22 through the top fixing power piece; the second clamping cylinder 22 is provided with a first top fixing hole 222 for the first top fixing block 51 to extend into, and the first top fixing block 51 can be tightly pressed against the side of the drill bit assembly 7; the first top fixing power piece 52 is used to drive the first top fixing block 51 to move.

[0074] Reference Figure 2 , Figure 3 In the present application, the first top fixing power component 52 is preferably a first cylinder; the casing of the first cylinder is fixed to the second clamping cylinder 22 by bolts, the piston rod of the second cylinder is connected to the first top fixing block 51, and the movement direction of the first piston rod is perpendicular to the axial direction of the second clamping cylinder 22.

[0075] Reference Figure 2 , Figure 3 In addition, in order to balance the clamping force on the side of the drill assembly 7, the first top fixing assembly 5 is provided in two groups, and the two groups of first top fixing assemblies 5 are symmetrically arranged about the axis of the second clamping tube 22.

[0076] Reference Figure 2 , Figure 3 The second top fixing assembly 6 includes a second top fixing block 61 and a second top fixing power piece 62; the second top fixing block 61 is installed on the second clamping cylinder 22 through the second top fixing power piece 62, and the second clamping cylinder 22 is provided with a second top fixing hole 223 for the second top fixing block 61 to extend into, and the second top fixing block 61 can be tightly pressed against the bottom of the drill bit assembly 7; the movement direction of the second top fixing block 61 is perpendicular to the movement direction of the first top fixing block 51.

[0077] Reference Figure 2 , Figure 3 The second top fixed power member 62 of the present application is preferably a second cylinder, the housing of the second cylinder is fixed to the second clamping cylinder 22 by bolts, and the movement direction of the second cylinder is perpendicular to the movement direction of the first cylinder.

[0078] The implementation principle of a drill welding device in an embodiment of the present application is as follows: the drill assembly 7 is fixed on the first clamping cylinder 21, the sliding cylinder 42 moves, the sliding cylinder 42 drives the second clamping cylinder 22 to move, the second clamp is close to the first clamping cylinder 21 and is pressed against the first clamping cylinder 21, the first top fixing power member 52 drives the first top fixing block 51 to move, the first top fixing block 51 pushes the side of the drill body 71 and the cemented carbide sheet 72, the second top fixing power member 62 drives the second top fixing block 61 to move, the second top fixing block 61 presses against the bottom of the drill body 71 and the cemented carbide sheet 72; the driving member 333 moves, the driving member 333 drives the bearing frame 332 to move, and the bearing member drives the moving guide The rail 321 moves, and the welding machine 31 is moved into the welding groove 221. The welding machine 31 welds the drill body 71 and the carbide sheet 72. During the welding process, the moving motor 324 drives the moving gear 322 to rotate, and the moving gear 322 moves on the moving rack 323, driving the welding machine 31 to move, so as to realize the welding of the welding points of the drill body 71 and the carbide sheet 72. After welding one side of the drill body 71 and the carbide sheet 72, the rotating motor 411 drives the driving gear 412 to move, and the driving gear 412 drives the driven gear 413 to move, and the second clamping cylinder moves; repeat the above operation to realize the comprehensive welding of the drill body 71 and the carbide sheet 72.

[0079] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A drill bit welding device, characterized in that: It comprises a welding platform (1), a clamping unit (2) and a welding unit (3); The clamping unit (2) comprises a first clamping cylinder (21) and a second clamping cylinder (22); The first clamping cylinder (21) is rotatably connected to the welding platform (1), and the drill assembly (7) is detachably mounted on the first clamping cylinder (21); The second clamping tube (22) is rotatably connected to the welding platform (1) and is capable of sliding along the length direction of the welding platform (1); the first clamping tube (21) and the second clamping tube (22) cooperate with each other to form a fixed space for the drill assembly (7); The second clamping tube (22) is provided with a welding groove (221) that matches the welding point of the drill bit assembly (7); The welding unit (3) is arranged on the welding platform (1), and the welding unit (3) is used to perform welding processing on the drill bit; It also includes a driving unit (4), wherein the driving unit (4) includes a rotating component (41) and a sliding component; The sliding assembly comprises a sliding cylinder (42); The sliding cylinder (42) is arranged on the welding platform (1), the piston rod of the sliding cylinder (42) is connected to the second clamping cylinder (22), and the movement direction of the sliding cylinder (42) is the same as the length direction of the welding platform (1); The rotating assembly (41) is connected to the second clamping cylinder (22) and is used to drive the second clamping cylinder (22) to rotate; The rotating assembly (41) comprises a rotating motor (411), a driving gear (412) and a driven gear (413); The rotating motor (411) is arranged on the welding platform (1); The driving gear (412) is arranged on the output shaft of the rotating motor (411); The driven gear (413) is arranged on the second clamping cylinder (22), the driven gear (413) is meshed with the driving gear (412), and the axial direction of the output shaft of the rotating motor (411) is the same as the length direction of the welding platform (1); It also includes a first fixing assembly (5) for tightening the drill body (71) and the side of the hard alloy sheet (72); The first fixing assembly (5) comprises a first fixing block (51) and a first fixing power member (52); The first fixing block (51) is arranged on the second clamping cylinder (22) via the first fixing power member (52); The second clamping tube (22) is provided with a first fixing hole (222) for the first fixing block (51) to extend into, and the first fixing block (51) can be tightly pressed against the side of the drill bit assembly (7); The first fixing power member (52) is used to drive the first fixing block (51) to move; It also includes a second fixing assembly (6) for tightening the bottom of the drill bit assembly (7); The second top fixing assembly (6) comprises a second top fixing block (61) and a second top fixing power member (62); The second fixing block (61) is arranged on the second clamping cylinder (22) via the second fixing power member (62). The second clamping cylinder (22) is provided with a second fixing hole (223) for the second fixing block (61) to extend therein, and the second fixing block (61) can be tightly pressed against the bottom of the drill bit assembly (7); the movement direction of the second fixing block (61) is perpendicular to the movement direction of the first fixing block (51); The welding unit (3) comprises a welding machine (31), a moving component (32) and a lifting component (33); The moving component (32) is arranged on the welding platform (1) via the lifting component (33); the lifting component (33) is used to drive the moving component (32) to move upward and downward, and is capable of extending the welding head of the welding machine (31) into the welding groove (221); The welding machine (31) is connected to the moving component (32), and the moving component (32) is used to drive the welding machine (31) to move along the length direction of the welding platform (1); The lifting assembly (33) comprises a lifting bracket (331), a bearing frame (332) and a driving member (333); The lifting bracket (331) is vertically arranged on the welding platform (1); The bearing frame (332) is slidably disposed on the lifting bracket (331) via the driving member (333); The driving member (333) is used to drive the bearing frame (332) to move in the vertical direction of the lifting bracket (331); The moving assembly (32) is connected to the supporting frame (332); The moving assembly (32) comprises a moving guide rail (321), a moving gear (322), a moving rack (323) and a moving motor (324); The movable guide rail (321) is arranged on the bearing frame (332), and the length direction of the movable guide rail (321) is the same as the length direction of the welding platform (1); the movable rack (323) is arranged on the movable guide rail (321); The moving gear (322) is movably disposed on the moving guide rail (321), and the moving gear (322) is meshed with the moving rack (323); The moving motor (324) is connected to the moving gear (322), and the moving motor (324) is used to drive the moving gear (322) to rotate.

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