Positioning and welding device for mechanical part machining

Abstract

The invention relates to the technical field of positioned welding, and discloses a positioned welding device for mechanical part machining, which comprises a box body, a motor is fixedly connected to the left side of the box body, an alignment device is arranged at the top of the box body, an extrusion device is arranged on the inner wall of the box body, and a vibration device is arranged at the rear part of the alignment device. The positioning and welding device comprises a box body, an aligning device is arranged on the left side of the box body, a dispersing device is arranged on the left side of the aligning device, supporting strips are fixedly connected to the inner wall of the box body, a stirring device is arranged on the front portion of the aligning device, and a lubricating device is arranged on the front portion of the aligning device. Through cooperative operation of the two-way screw rod, the T-shaped plate, the connecting rod, the triangular prism, the trapezoidal plate, the extrusion column, the movable plate, the extrusion spring, the extrusion plate and the rebound plate, an object needing to be welded can be fixed, the stability of the welded object is guaranteed, and deviation in the welding process is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of positioning welding, in particular to a positioning welding device for machining mechanical parts. Background Art

[0002] Mechanical parts, also known as mechanical elements, are the basic components that make up machinery and are the inseparable individual parts that make up machinery and machines.

[0003] The patent with publication number CN219852943U discloses a positioning welding device for bed frame processing, including a workbench, a sliding seat is installed at the top of the workbench, and a first fixed block is fixedly connected to both sides of the top of the sliding seat. A first screw rod is fixedly connected to one side of the first fixed block. The positioning welding device for bed frame processing provided by the utility model starts the second motor, and the second motor drives the rotating rod to start rotating, and the rotating rod drives the second bevel gear to start rotating. Because the first bevel gear and the second bevel gear are engaged, the first bevel gear is driven to start rotating, and the first bevel gear drives the first screw rod to start rotating. When the first screw rod rotates, it drives the extrusion block connected to it to move so that it fits with the outer surface of the longitudinal workpiece, and cooperates with the second baffle to position the longitudinal workpiece, and then it can be welded. The invention has the advantages of simple operation and good positioning effect, solves the disadvantages of manual crimping, and improves the welding quality of the bed frame. A positioning welding device for bed frame processing, but the device has the problem of easy offset in another direction during welding due to unidirectional clamping. Therefore, a positioning welding device for mechanical parts processing is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a positioning welding device for machining mechanical parts in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a positioning welding device for processing mechanical parts, comprising a box body, the left side of the box body is fixedly connected to the motor, the top of the box body is provided with an alignment device, the inner wall of the box body is provided with an extrusion device, the rear end of the alignment device is provided with a vibration device, the left side of the alignment device is provided with a dispersion device, the inner wall of the box body is fixedly connected to a support bar, the front end of the alignment device is provided with a stirring device, and the front end of the alignment device is provided with a lubrication device, the alignment device comprises a bidirectional screw, a T-shaped plate, a connecting rod, a triangular column, a trapezoidal plate, an extrusion column, a movable plate, an extrusion spring, an extrusion plate and a rebound plate, the bidirectional screw is fixedly connected to the output end of the motor, the T-shaped plate is threadedly connected to the circumferential surface of the bidirectional screw, the connecting rod is fixedly connected to the right side of the T-shaped plate, the triangular column is fixedly connected to the right side of the connecting rod, the trapezoidal plate is slidably connected to the top of the box body, the extrusion column is fixedly connected to the rear end of the trapezoidal plate, and the movable plate is fixedly connected to the extrusion column. The rear part of the pressure column, the extrusion spring is fixedly connected to the rear part of the movable plate, the extrusion plate is fixedly connected to the rear part of the extrusion spring, and the rebound plate is fixedly connected to the bottom part of the trapezoidal plate. The extrusion device includes an L-column, a vertical plate, a support spring and a Z-rod. The L-column is fixedly connected to the circumferential surface of the extrusion column, the vertical plate contacts the circumferential surface of the L-column, the support spring is fixedly connected to the top of the vertical plate, the Z-rod is fixedly connected to the rear part of the vertical plate, the bottom of the T-plate contacts the top of the support bar, and the bottom of the extrusion plate contacts the top of the support bar. The positioning welding device for processing mechanical parts can fix the object to be welded through the coordinated operation of the two-way screw, T-plate, connecting rod, triangular column, trapezoidal plate, extrusion column, movable plate, extrusion spring, extrusion plate and rebound plate, ensure the stability of the welding object and prevent it from deflecting during the welding process, and further fix the welding object to prevent the welding object from moving up and down during the welding process through the coordinated operation between the L-column, vertical plate, support spring and Z-rod.

[0006] Preferably, the vibration device includes a horizontal plate, a sliding column, a vertical spring, a limiting ring, a protrusion and a semi-cylinder, the horizontal plate is fixedly connected to the front of the T-shaped plate, the sliding column is slidably connected to the inner wall of the horizontal plate, the limiting ring is fixedly connected to the circumferential surface of the sliding column, the protrusion is fixedly connected to the top of the sliding column, the vertical spring is fixedly connected to the top of the horizontal plate, the semi-cylinder is fixedly connected to the bottom of the support bar, the dispersion device includes a connecting block, a moving bar, a rotating plate, a rotating wheel, a rotating column and a brush, the connecting block is fixedly connected to the bottom of the T-shaped plate, the moving bar is fixedly connected to the right side of the connecting block, the rotating plate is fixedly connected to the right side of the moving bar, the rotating The column is rotatably connected to the rear part of the rotating plate, the rotating wheel is fixedly connected to the circumferential surface of the rotating column, the brush is fixedly connected to the circumferential surface of the rotating cylinder, the circumferential surface of the rotating wheel contacts the bottom of the inner wall of the box, the circumferential surface of the protrusion contacts the circumferential surface of the semi-cylinder, and the positioning welding device for processing mechanical parts can vibrate the welding slag on the surface of the support bar into the interior of the box through the coordinated operation between the horizontal plate, the sliding column, the vertical spring, the limiting ring, the protrusion and the semi-cylinder, thereby reducing the manual workload, and can disperse the welding slag inside the box through the coordinated operation between the connecting block, the moving bar, the rotating plate, the rotating wheel, the rotating column and the brush, so that the box can collect the welding slag to the greatest extent.

[0007] Preferably, the oil tank is fixedly connected to the right side of the T-shaped plate, the support plate is fixedly connected to the bottom of the oil tank, the rotating rod is rotatably connected to the rear of the support plate, the rotating wheel is fixedly connected to the circumferential surface of the rotating rod, the large gear is fixedly connected to the circumferential surface of the rotating rod, the support column is rotatably connected to the front of the support plate, the porous wheel is fixedly connected to the circumferential surface of the support column, the small gear is fixedly connected to the circumferential surface of the support column, the L-plate contacts the circumferential surface of the porous wheel, the oil outlet is opened at the bottom of the L-plate, the stirring device includes a threaded rod, a rotating body, a floating bar, an extrusion block, a small spring and a short column, the floating bar is slidably connected to the inner wall of the oil tank, the threaded rod is threadedly connected to the inner wall of the oil tank, the short column is slidably connected to the inner wall of the oil tank, the extrusion block is fixedly connected to the left side of the short column, the small spring The circumferential surface of the threaded rod is slidably connected to the inner wall of the T-shaped plate. The positioning welding device for processing mechanical parts can make the lubricating oil in the oil tank flow out intermittently and evenly through the coordinated operation between the oil tank, support plate, rotating rod, rotating wheel, large gear, small gear, support column, L-plate, oil outlet and porous wheel, without waste, greatly reducing manpower. Through the coordinated operation between the threaded rod, rotating body, floating bar, extrusion block, small spring and short column, the amount of oil in the oil tank can be judged by the length of the short column, so that the lubricating oil can be added in time and the lubricating oil in the oil tank can be stirred to ensure the fluidity of the lubricating oil so that it can flow out smoothly.

[0008] The present invention adopts the above technical solution, which can bring the following beneficial effects: 1. The positioning welding device for processing mechanical parts can fix the object to be welded through the coordinated operation between the bidirectional screw, T-shaped plate, connecting rod, triangular column, trapezoidal plate, extrusion column, movable plate, extrusion spring, extrusion plate and rebound plate, ensuring the stability of the welded object and preventing it from shifting during the welding process. The coordinated operation between the L-column, vertical plate, support spring and Z-rod further fixes the welded object and prevents it from moving up and down during the welding process.

[0009] 2. The positioning welding device for machining mechanical parts can vibrate the welding slag on the surface of the support bar into the interior of the box 1 through the coordinated operation between the horizontal plate, sliding column, vertical spring, limiting ring, protrusion and semi-cylinder, thereby reducing the manual workload. The welding slag inside the box can be dispersed through the coordinated operation between the connecting block, moving bar, rotating plate, rotating wheel, rotating column and brush, so that the box can collect welding slag to the greatest extent.

[0010] 3. The positioning welding device for processing mechanical parts can make the lubricating oil in the oil tank flow out intermittently and evenly through the coordinated operation among the oil tank, support plate, rotating rod, rotating wheel, large gear, small gear, support column, L plate, oil outlet and porous wheel, without waste, which greatly reduces manpower. The coordinated operation among the threaded rod, rotating body, floating bar, extrusion block, small spring and short column can judge the amount in the oil tank by the length of the short column, so that lubricating oil can be added in time and the lubricating oil in the oil tank can be stirred to ensure the fluidity of the lubricating oil so that it can flow out smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a half-section schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic structural diagram of the alignment device of the present invention; Figure 4 This is a schematic structural diagram of the extrusion device of the present invention; Figure 5 This is a schematic structural diagram of the vibration device of the present invention; Figure 6 This is a schematic structural diagram of the dispersion device of the present invention; Figure 7 This is a schematic structural diagram of the lubrication device of the present invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure; Figure 9 Schematic diagram of the stirring device structure of the present invention.

[0012] In the figure: 1. Box; 2. Motor; 3. Alignment device; 301. Bidirectional screw; 302. T-shaped plate; 303. Connecting rod; 304. Triangular column; 305. Trapezoidal plate; 306. Extrusion column; 307. Moving plate; 308. Extrusion spring; 309. Extrusion plate; 310. Rebound plate; 4. Extrusion device; 401. L-pillar; 402. Vertical plate; 403. Support spring; 404. Z-shaped rod; 5. Vibration device; 501. Horizontal plate; 502. Sliding column; 503. Vertical spring; 504. Limiting ring; 505. Bump; 506. Semi-cylinder; 6. Dispersing device; 601, connecting block; 602, moving bar; 603, rotating plate; 604, rotating wheel; 605, rotating column; 606, brush; 7, lubricating device; 701, oil tank; 702, supporting plate; 703, rotating rod; 704, rotating wheel; 705, large gear; 706, small gear; 707, supporting column; 708, L-plate; 709, oil outlet; 710, porous wheel; 8, stirring device; 801, threaded rod; 802, rotating body; 803, floating bar; 804, extrusion block; 805, small spring; 806, short column; 9, supporting bar. DETAILED DESCRIPTION

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] See also Figures 1-9, one embodiment of the present invention is: a positioning welding device for machining mechanical parts, including a box body 1, a motor 2 is fixedly connected to the left side of the box body 1, an alignment device 3 is provided on the top of the box body 1, an extrusion device 4 is provided on the inner wall of the box body 1, a vibration device 5 is provided at the rear of the alignment device 3, a dispersion device 6 is provided on the left side of the alignment device 3, a support bar 9 is fixedly connected to the inner wall of the box body 1, a stirring device 8 is provided at the front of the alignment device 3, a lubrication device 7 is provided at the front of the alignment device 3, the alignment device 3 includes a bidirectional screw 301, a T-shaped plate 302, a connecting rod 303, a triangular column 304, a trapezoidal plate 305, an extrusion column 306, a movable plate 307, an extrusion spring 308, an extrusion plate 309 and a rebound plate 310, a bidirectional screw 301 is fixedly connected to the output end of the motor 2, the T-shaped plate 302 is threadedly connected to the circumference of the bidirectional screw 301, the connecting rod 303 is fixedly connected to the right side of the T-shaped plate 302, the triangular column 304 is fixedly connected to the right side of the connecting rod 303, the trapezoidal plate 305 is slidably connected to the top of the box body 1, the extrusion column 306 is fixedly connected to the rear of the trapezoidal plate 305, the moving plate 307 is fixedly connected to the rear of the extrusion column 306, the extrusion spring 308 is fixedly connected to the rear of the moving plate 307, the extrusion plate 309 is fixedly connected to the rear of the extrusion spring 308, and the rebound plate 310 is fixedly connected to the bottom of the trapezoidal plate 305. The extrusion device 4 includes an L column 401, a vertical plate 402, a support spring 403 and a Z-shaped rod 404. The L column 401 is fixedly connected to the extrusion column 306. The circumferential surface of the pressure column 306, the vertical plate 402 contacts the circumferential surface of the L column 401, the support spring 403 is fixedly connected to the top of the vertical plate 402, the Z-shaped rod 404 is fixedly connected to the rear of the vertical plate 402, the bottom of the T-shaped plate 302 contacts the top of the support bar 9, the bottom of the extrusion plate 309 contacts the top of the support bar 9, the vibration device 5 includes a horizontal plate 501, a sliding column 502, a vertical spring 503, a limiting ring 504, a protrusion 505 and a semi-cylinder 506, the horizontal plate 501 is fixedly connected to the front of the T-shaped plate 302, the sliding column 502 is slidably connected to the inner wall of the horizontal plate 501, the limiting ring 504 is fixedly connected to the circumferential surface of the sliding column 502, the protrusion 505 is fixedly connected to the top of the sliding column 502, the vertical spring 503 is fixed Connected to the top of the horizontal plate 501, the semi-cylinder 506 is fixedly connected to the bottom of the support bar 9. The dispersing device 6 includes a connecting block 601, a moving bar 602, a rotating plate 603, a rotating wheel 604, a rotating column 605 and a brush 606. The connecting block 601 is fixedly connected to the bottom of the T-shaped plate 302, the moving bar 602 is fixedly connected to the right side of the connecting block 601, the rotating plate 603 is fixedly connected to the right side of the moving bar 602, the rotating column 605 is rotatably connected to the rear of the rotating plate 603, the rotating wheel 604 is fixedly connected to the circumferential surface of the rotating column 605, the brush 606 is fixedly connected to the circumferential surface of the rotating column 605, the circumferential surface of the rotating wheel 604 contacts the bottom of the inner wall of the box body 1, and the circumferential surface of the protrusion 505 contacts the circumferential surface of the semi-cylinder 506; Working principle: Motor 2 drives the bidirectional screw 301 to rotate, the bidirectional screw 301 drives the T-shaped plate 302 to move, the T-shaped plate 302 drives the connecting rod 303 to move, the connecting rod 303 drives the triangular column 304 to move, the triangular column 304 squeezes the trapezoidal plate 305 to move between, the trapezoidal plate 305 drives the squeezing column 306 to move between, the squeezing column 306 drives the moving plate 307 to move, the moving plate 307 drives the squeezing plate 309 to move toward the middle through the squeezing spring 308, which can fix the object to be welded, ensure the stability of the welded object and prevent it from deflecting during the welding process, the squeezing column 306 moves toward the middle and drives the L-pillar 401 to move toward the middle, the L-pillar 401 squeezes the vertical plate 402 to move downward, and the vertical plate 402 drives the Z-shaped plate 404 to move downward, thereby further fixing the welded object and preventing the welded object from moving up and down during the welding process; The T-shaped plate 302 drives the horizontal plate 501 to move to the right, the horizontal plate 501 drives the sliding column 502 to move to the right, the sliding column 502 drives the limiting ring 504 to move, the sliding column 502 drives the protrusion 505 to move to the right, the protrusion 505 squeezes the semi-cylinder 506 so that the protrusion 505 moves downward, the downward movement of the protrusion 505 drives the sliding column 502 to move downward, the sliding column 502 drives the limiting ring 504 to move downward, and at the same time squeezes the vertical spring 503. When the protrusion 505 no longer contacts the semi-cylinder 506, the vertical spring 503 restores the sliding column 502, so that the protrusion 505 hits the semi-cylinder 506. Hitting the support bar 9 can vibrate the welding slag on the surface of the support bar 9 into the interior of the box 1, thereby reducing the manual workload. The T-shaped plate 302 drives the connecting block 601 to move, the connecting block 601 drives the moving bar 602 to move, the moving bar 602 drives the rotating plate 603 to move, the rotating plate 603 drives the rotating column 605 to move, and the rotating column 605 drives the rotating wheel 604 to move. Because of the effect of friction, the rotating wheel 604 rotates, the rotating wheel 604 drives the rotating column 605 to rotate, and the rotation of the rotating column 605 drives the brush 606 to rotate, which can disperse the welding slag inside the box 1, so that the box 1 can collect the welding slag to the greatest extent.

[0015] See also Figures 1-9On the basis of the above embodiment, in another embodiment of the present invention, the oil tank 701 is fixedly connected to the right side of the T-shaped plate 302, the support plate 702 is fixedly connected to the bottom of the oil tank 701, the rotating rod 703 is rotatably connected to the rear of the support plate 702, the rotating wheel 704 is fixedly connected to the circumferential surface of the rotating rod 703, the large gear 705 is fixedly connected to the circumferential surface of the rotating rod 703, the support column 707 is rotatably connected to the front of the support plate 702, the porous wheel 710 is fixedly connected to the circumferential surface of the support column 707, the small gear 706 is fixedly connected to the circumferential surface of the support column 707, the L plate 708 contacts the circumferential surface of the porous wheel 710, and the oil outlet hole 709 is opened on the L plate 7 At the bottom of 08, the stirring device 8 includes a threaded rod 801, a rotating body 802, a floating bar 803, an extrusion block 804, a small spring 805 and a short column 806. The floating bar 803 is slidably connected to the inner wall of the oil tank 701, the threaded rod 801 is threadedly connected to the inner wall of the oil tank 701, the short column 806 is slidably connected to the inner wall of the oil tank 701, the extrusion block 804 is fixedly connected to the left side of the short column 806, the small spring 805 is fixedly connected to the right side of the inner wall of the oil tank 701, the rotating body 802 is threadedly connected to the circumferential surface of the threaded rod 801, the left side of the rotating body 802 contacts the left side of the inner wall of the oil tank 701, and the circumferential surface of the threaded rod 801 is slidably connected to the inner wall of the T-shaped plate 302.

[0016] Working principle: Motor 2 drives the bidirectional screw 301 to rotate, the bidirectional screw 301 drives the T-shaped plate 302 to move, the T-shaped plate 302 drives the oil tank 701 to move, the oil tank 701 drives the support plate 702 to move, the support plate 702 drives the rotating rod 703 to move, the rotating rod 703 moves and drives the rotating wheel 704 to rotate, the rotating wheel 704 rotates due to the friction with the circumferential surface of the bidirectional screw 301, the rotating wheel (704) rotates and drives the rotating rod 703 to rotate, the rotating rod 703 drives the large gear 705 to rotate, the large gear 705 drives the support column 707 to rotate, the support column 707 drives the porous wheel 710 Rotation can make the lubricating oil in the oil tank 701 flow out intermittently and evenly, without waste, greatly reducing manpower. The movement of the T-shaped plate 302 drives the rotating body 802 to move and rotate through the action of the threaded rod 801, which can stir the lubricating oil in the oil tank 701, ensure the fluidity of the lubricating oil, and allow it to flow out smoothly. When the lubricating oil in the oil tank 701 is reduced, the floating bar 803 moves downward, and the floating bar 803 squeezes the squeezing block 804 to move it to the right, and the squeezing block 804 drives the short column 806 to move to the right. The amount of oil in the oil tank 701 can be judged by the length of the short column 806, and the lubricating oil can be added in time.

[0017] The present invention provides a tack welding device for machining mechanical parts. There are numerous methods and approaches for implementing this technical solution. The foregoing merely represents a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Any components not specified in this embodiment may be implemented using existing technologies.

Claims

1. A positioning welding device for machining mechanical parts, comprising a box (1), characterized in that: The left side of the box (1) is fixedly connected to a motor (2), the top of the box (1) is provided with an alignment device (3), the inner wall of the box (1) is provided with an extrusion device (4), the rear of the alignment device (3) is provided with a vibration device (5), the left side of the alignment device (3) is provided with a dispersion device (6), the inner wall of the box (1) is fixedly connected to a support bar (9), the front of the alignment device (3) is provided with a stirring device (8), and the front of the alignment device (3) is provided with a lubrication device (7); The alignment device (3) comprises a bidirectional screw (301), a T-shaped plate (302), a connecting rod (303), a triangular column (304), a trapezoidal plate (305), an extrusion column (306), a movable plate (307), an extrusion spring (308), an extrusion plate (309) and a rebound plate (310), wherein the bidirectional screw (301) is fixedly connected to the output end of the motor (2), the T-shaped plate (302) is threadedly connected to the circumferential surface of the bidirectional screw (301), and the connecting rod (303) is fixedly connected to the right side of the T-shaped plate (302). The triangular column (304) is fixedly connected to the right side of the connecting rod (303), the trapezoidal plate (305) is slidably connected to the top of the box (1), the extrusion column (306) is fixedly connected to the rear of the trapezoidal plate (305), the movable plate (307) is fixedly connected to the rear of the extrusion column (306), the extrusion spring (308) is fixedly connected to the rear of the movable plate (307), the extrusion plate (309) is fixedly connected to the rear of the extrusion spring (308), and the rebound plate (310) is fixedly connected to the bottom of the trapezoidal plate (305).

2. A positioning welding device for machining mechanical parts according to claim 1, characterized in that: The extrusion device (4) comprises an L-pillar (401), a vertical plate (402), a support spring (403) and a Z-shaped rod (404); the L-pillar (401) is fixedly connected to the circumferential surface of the extrusion column (306); the vertical plate (402) contacts the circumferential surface of the L-pillar (401); the support spring (403) is fixedly connected to the top of the vertical plate (402); and the Z-shaped rod (404) is fixedly connected to the rear of the vertical plate (402).

3. A positioning welding device for machining mechanical parts according to claim 2, characterized in that: The bottom of the T-shaped plate (302) contacts the top of the support bar (9), and the bottom of the extrusion plate (309) contacts the top of the support bar (9).

4. A positioning welding device for machining mechanical parts according to claim 3, characterized in that: The vibration device (5) includes a horizontal plate (501), a sliding column (502), a vertical spring (503), a limiting ring (504), a protrusion (505) and a semi-cylinder (506), wherein the horizontal plate (501) is fixedly connected to the front of the T-shaped plate (302), the sliding column (502) is slidably connected to the inner wall of the horizontal plate (501), the limiting ring (504) is fixedly connected to the circumferential surface of the sliding column (502), the protrusion (505) is fixedly connected to the top of the sliding column (502), the vertical spring (503) is fixedly connected to the top of the horizontal plate (501), and the semi-cylinder (506) is fixedly connected to the bottom of the support bar (9).

5. A positioning welding device for machining mechanical parts according to claim 4, characterized in that: The dispersing device (6) comprises a connecting block (601), a moving bar (602), a rotating plate (603), a rotating wheel (604), a rotating column (605) and a brush (606), wherein the connecting block (601) is fixedly connected to the bottom of the T-shaped plate (302), the moving bar (602) is fixedly connected to the right side of the connecting block (601), the rotating plate (603) is fixedly connected to the right side of the moving bar (602), the rotating column (605) is rotatably connected to the rear of the rotating plate (603), the rotating wheel (604) is fixedly connected to the circumferential surface of the rotating column (605), and the brush (606) is fixedly connected to the circumferential surface of the rotating column (605).

6. A positioning welding device for machining mechanical parts according to claim 5, characterized in that: The circumferential surface of the rotating wheel (604) contacts the bottom of the inner wall of the box body (1), and the circumferential surface of the protrusion (505) contacts the circumferential surface of the semi-cylinder (506).

7. A positioning welding device for machining mechanical parts according to claim 6, characterized in that: The oil tank (701) is fixedly connected to the right side of the T-shaped plate (302), the support plate (702) is fixedly connected to the bottom of the oil tank (701), the rotating rod (703) is rotatably connected to the rear of the support plate (702), the rotating wheel (704) is fixedly connected to the circumferential surface of the rotating rod (703), the large gear (705) is fixedly connected to the circumferential surface of the rotating rod (703), the support column (707) is rotatably connected to the front of the support plate (702), the porous wheel (710) is fixedly connected to the circumferential surface of the support column (707), the small gear (706) is fixedly connected to the circumferential surface of the support column (707), the L plate (708) contacts the circumferential surface of the porous wheel (710), and the oil outlet hole (709) is opened at the bottom of the L plate (708); The stirring device (8) comprises a threaded rod (801), a rotating body (802), a floating bar (803), an extrusion block (804), a small spring (805) and a short column (806), wherein the floating bar (803) is slidably connected to the inner wall of the oil tank (701), the threaded rod (801) is threadedly connected to the inner wall of the oil tank (701), the short column (806) is slidably connected to the inner wall of the oil tank (701), the extrusion block (804) is fixedly connected to the left side of the short column (806), the small spring (805) is fixedly connected to the right side of the inner wall of the oil tank (701), and the rotating body (802) is threadedly connected to the circumferential surface of the threaded rod (801).

8. The positioning welding device for machining mechanical parts according to claim 7, characterized in that: The left side of the rotating body (802) contacts the left side of the inner wall of the oil tank (701), and the circumferential surface of the threaded rod (801) is slidably connected to the inner wall of the T-shaped plate (302).

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