A positioning device for welding equipment used in machining mechanical parts

Abstract

This invention discloses a positioning device for welding equipment used in machining mechanical parts, relating to the field of machining technology. The invention includes a chassis with a control panel on its front side; a clamping mechanism is located within the chassis cavity, comprising a fixed ring fixedly connected to the chassis cavity, a through groove formed on the surface of the fixed ring, and a threaded tube disposed within the through groove cavity. This invention employs a single-motor drive combined with an adaptive switching mechanism, achieving intelligent power distribution through magnetic ring repulsion and gear engagement, significantly reducing the economic cost of multi-motor systems. The adaptive switching mechanism (cam, slider, and drive rod linkage) allows the clamping plate to disengage from the transmission chain in real time according to the part contour, adapting to irregular surfaces without the need for sensors. This avoids damage to sensors caused by the high-temperature environment during welding equipment operation, improving the reliability and long-term accuracy stability of the device under complex working conditions.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, and in particular relates to a positioning device for welding equipment used in machining mechanical parts. Background Technology

[0002] In the field of machining, welding is a crucial step in connecting parts, and positioning accuracy directly affects welding quality. Traditional welding positioning devices often use fixed clamps or unidirectional clamping mechanisms. For parts with irregular surface contours (such as curved surfaces or stepped parts), the clamp position needs to be adjusted or the clamps need to be replaced multiple times, resulting in low clamping efficiency and poor positioning accuracy.

[0003] Although some multi-directional clamping devices have emerged in the existing technology, they generally rely on multi-motor drive or sensor feedback (such as pressure sensors and displacement sensors), which has the following drawbacks: multi-motor drive increases equipment cost, and motor synchronization control is difficult, which can easily lead to uneven clamping force; sensors are easily damaged in the high temperature environment of welding, and long-term use will reduce detection accuracy and affect positioning reliability; the clamping stroke of traditional devices is fixed, making it difficult to adapt to parts of different sizes and shapes, resulting in poor versatility.

[0004] To address these issues, we provide a positioning device for welding equipment used in machining mechanical parts. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning device for welding equipment used in machining mechanical parts. By combining a clamping mechanism and an adaptive switching mechanism, this invention solves the problems of high cost of multiple motors, easy damage of sensors, and poor adaptability to clamping irregular parts in existing positioning devices for welding equipment used in machining mechanical parts.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0007] This invention relates to a positioning device for welding equipment used in machining mechanical parts, comprising a housing with a control panel on the front; a clamping mechanism is provided in the inner cavity of the housing, the clamping mechanism including a fixed ring fixedly connected to the inner cavity of the housing, a through groove formed on the surface of the fixed ring, a threaded tube disposed in the inner cavity of the through groove, a mounting plate fixedly connected to one end of the threaded tube, and a clamping plate disposed on one side of the mounting plate; an adaptive switching mechanism is provided on the surface of the fixed ring, the adaptive switching mechanism including a rotating shaft rotatably connected to the outer surface of the fixed ring through a bearing seat, a switching gear sleeved on the surface of the rotating shaft, and a first magnetic ring fixedly connected to one side of the switching gear.

[0008] The invention is further configured such that a drive motor is fixedly connected to the inner cavity of the chassis, a first gear is fixedly connected to the output shaft of the drive motor, a toothed ring is meshed on the surface of the first gear, a rack is fixedly connected to the surface of the toothed ring, a threaded rod is threadedly connected to the inner cavity of the threaded tube, and a second gear is fixedly connected to the surface of the threaded rod. The drive motor provides the driving force, which drives the rack to rotate through the transmission of the first gear and the toothed ring. The rack drives the threaded rod to rotate through the switching gear and the second gear. The threaded tube realizes the radial movement of the clamping plate under the transmission of the threaded rod.

[0009] The invention is further configured such that a constraint post is fixedly connected to one side of the toothed ring, the number of the constraint posts being eight and arranged in a circular array, and the other end of the constraint post being slidably connected to the inner cavity of the chassis. The constraint post restricts the rotation range of the toothed ring, ensuring that it only translates along the circumferential direction, and avoids transmission failure due to excessive rotation.

[0010] The invention is further configured such that a fixed shaft is movably connected to the surface of the threaded tube via a bearing seat, and a cam and a third gear are sequentially fixedly connected to the surface of the fixed shaft from front to back. A toothed plate meshes with the surface of the third gear, and one side of the toothed plate is fixedly connected to one side of the clamping plate. A first spring is sleeved on the surface of the toothed plate, and both ends of the first spring are fixedly connected to one side of the mounting plate and the clamping plate, respectively. The extension block and the slider are slidably connected. When the clamping plate contacts the part, the clamping plate drives the third gear to rotate via the toothed plate, and the third gear drives the cam to rotate via the fixed shaft. The cam pushes the extension block via the slider, and the telescopic rod limits the extension block, causing it to move horizontally. The extension block drives the drive rod to move via the drive wheel and the drive block, and the drive rod pushes the switching gear to move. When the clamping plate contacts the travel block, the cam rotates 90 degrees, and the drive rod pushes the switching gear to completely disengage from the second gear, ending the corresponding threaded tube travel distance.

[0011] The present invention is further configured such that a stroke block is fixedly connected between the mounting plate and the clamping plate, a sliding groove is provided on one side of the mounting plate, and a slider is slidably connected to the inner cavity of the sliding groove. The stroke block limits the maximum moving distance of the clamping plate to avoid overpressure damage to the first spring. The slider cooperates with the sliding groove to limit the extension block and make it move axially, so that the clamping plate fits the outer contour of the part and can adapt to parts of different sizes.

[0012] The present invention is further configured such that a support plate is fixedly connected to one side of the fixed ring, a telescopic rod is fixedly connected to one side of the support plate, an extension block is fixedly connected to the other end of the telescopic rod, a drive wheel is fixedly connected to one side of the extension block, a sliding hole is provided on the surface of the support plate, and a sliding rod is slidably connected to the inner cavity of the sliding hole, a drive block is fixedly connected to one end of the sliding rod, and a drive rod is fixedly connected to one side of the drive block.

[0013] The invention is further configured such that a second spring is sleeved on the surface of the telescopic rod, a third spring is sleeved on the surface of the slide rod, a ball bearing is provided at the other end of the drive rod, the slide rod cooperates with the sliding hole to facilitate the limiting of the drive block, the second spring acts on the extension block to facilitate the reset of the extension block, the third spring facilitates the reset of the slide rod, and the ball bearing reduces the frictional resistance between the drive rod and the surface of the switching gear.

[0014] The present invention is further configured such that a locking block is fixedly connected to the surface of the rotating shaft, a locking groove is fixedly connected to the shaft center of the switching gear, a fourth spring is fixedly connected to one side of the locking block, and the other end of the fourth spring is fixedly connected to one side of the switching gear. The locking block and the locking groove cooperate to ensure that the switching gear maintains power transmission during the sliding process on the rotating shaft. The fourth spring provides elastic force so that the switching gear remains in a meshed state when there is no external force, so that it meshes with the rack and the second gear.

[0015] The invention is further configured such that an energizing block is fixedly connected to the inner cavity of the chassis, and a second magnetic ring is fixedly connected to the bottom of the threaded tube. The second magnetic ring is an electromagnetic ring, and the magnetic poles of the first and second magnetic rings are designed to be opposite. The energizing block supplies power to the second magnetic ring. When the threaded tube is reset to the designated position, the second magnetic ring contacts the energizing block. After the second magnetic ring is energized, it generates a repulsive force to drive it. This, in conjunction with the first magnetic ring, causes the switching gear to move outward, disengaging it from the rack and the second gear, thus releasing the power transmission and ensuring the threaded tube reset effect. The operation is simple and improves the clamping efficiency of the parts.

[0016] The invention is further configured such that an energizing block is fixedly connected to the inner cavity of the chassis, a second magnetic ring is fixedly connected to the bottom of the threaded tube, a limiting block is fixedly connected to the surface of the threaded tube, and a limiting groove adapted to the limiting block is opened in the inner cavity of the through groove. The limiting block and the limiting groove cooperate to limit the rotation angle of the threaded tube, ensure that the clamping plate moves along a fixed trajectory, avoid deviation, and enable rapid positioning and clamping of mechanical parts.

[0017] The present invention has the following beneficial effects.

[0018] 1. This invention adopts a single motor drive combined with an adaptive switching mechanism. It achieves intelligent power distribution through magnetic ring repulsion and gear clutch, which significantly reduces the economic cost of multi-motor systems. The adaptive switching mechanism (cam, slider and drive rod linkage) enables the clamping plate to disengage from the transmission chain in real time according to the contour of the part. It can adapt to irregular surfaces without the need for sensors, avoids damage to sensors caused by the high temperature environment during the operation of welding equipment, and improves the reliability and long-term accuracy stability of the device under complex working conditions.

[0019] 2. This invention constrains the threaded tube to move only axially through the limiting block and limiting groove in the clamping mechanism, and limits the clamping stroke with the stroke block, ensuring uniform clamping force and preventing overload. During reset, the threaded tube moves to the initial position, triggering the energizing block to supply power to the second magnetic ring. The magnetic repulsion force pushes the switching gear to disengage from the transmission chain, achieving zero-error synchronous reset and improving processing efficiency.

[0020] 3. This invention enhances the translational stability of the tooth ring through the constraint pillars of eight circumferential arrays to prevent transmission misalignment. The ball bearing design significantly reduces the frictional loss between the drive rod and the switching gear. The fourth spring ensures that the switching gear is in constant engagement. The locking block and slot ensure the continuity of power transmission. The mechanical self-locking mechanism reduces energy consumption.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0023] Figure 1 This is a perspective view of a positioning device for welding equipment used in machining mechanical parts.

[0024] Figure 2 This is a schematic diagram of the internal structure of the housing in a positioning device for welding equipment used in machining mechanical parts.

[0025] Figure 3 This is a diagram showing the fit between the first gear and the toothed ring in a positioning device of a welding equipment used for machining mechanical parts.

[0026] Figure 4 This is a diagram showing the engagement of a switching gear and a second gear in a positioning device of a welding equipment used for machining mechanical parts.

[0027] Figure 5 This is a diagram showing the fit between a limiting block and a limiting groove in a positioning device for welding equipment used in machining mechanical parts.

[0028] Figure 6 This is an exploded view of the rotating shaft and switching gear in the positioning device of a welding equipment used for machining mechanical parts.

[0029] Figure 7 This is a diagram showing the fit between a slider and an extension block in a positioning device of a welding equipment used for machining mechanical parts.

[0030] Figure 8 An exploded view of the cam and the third gear in the positioning device of a welding equipment used for machining mechanical parts.

[0031] In the attached diagram: 1. Chassis; 2. Control panel; 3. Fixing ring; 4. Through groove; 5. Threaded pipe; 6. Mounting plate; 7. Clamping plate; 8. Rotating shaft; 9. Switching gear; 10. First magnetic ring; 11. Drive motor; 12. First gear; 13. Toothed ring; 14. Rack; 15. Threaded rod; 16. Second gear; 17. Constraint post; 18. Fixing shaft; 19. Cam; 20. Third gear; 21. Toothed plate; 22. First spring; 23. Stroke block; 24. Slide groove; 25. Slider; 26. Support plate; 27. Telescopic rod; 28. Extension block; 29. ​​Drive wheel; 30. Slide rod; 31. Drive block; 32. Drive rod; 33. Second spring; 34. Third spring; 35. Locking block; 36. Locking slot; 37. Fourth spring; 38. Power block; 39. Second magnetic ring; 40. Limiting block; 41. Limiting groove. Detailed Implementation

[0032] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Example 1: Please refer to Figures 1-8 This invention relates to a positioning device for welding equipment used in machining mechanical parts, comprising a housing 1, a control panel 2 on the front of the housing 1, a clamping mechanism inside the housing 1, the clamping mechanism including a fixing ring 3 fixedly connected to the inside of the housing 1, a through groove 4 formed on the surface of the fixing ring 3, a threaded tube 5 disposed inside the through groove 4, a mounting plate 6 fixedly connected to one end of the threaded tube 5, and a clamping plate 7 disposed on one side of the mounting plate 6. A drive motor 11 is fixedly connected to the inside of the housing 1, and the output shaft of the drive motor 11 is fixedly connected to a first... Gear 12, a toothed ring 13 meshes on the surface of the first gear 12, a rack 14 is fixedly connected to the surface of the toothed ring 13, a threaded rod 15 is threadedly connected to the inner cavity of the threaded tube 5, a second gear 16 is fixedly connected to the surface of the threaded rod 15, a constraint post 17 is fixedly connected to one side of the toothed ring 13, there are eight constraint posts 17 arranged in a circumferential array, the other end of the constraint post 17 is slidably connected to the inner cavity of the chassis 1, a limit block 40 is fixedly connected to the surface of the threaded tube 5, and a limit groove 41 adapted to the limit block 40 is opened in the inner cavity of the through groove 4.

[0034] Further details: The drive motor 11 provides the main force, which drives the rack 14 to rotate through the first gear 12 and the toothed ring 13. The rack 14 drives the threaded rod 15 to rotate through the switching gear 9 and the second gear 16. The threaded tube 5 realizes the radial movement of the clamping plate 7 under the transmission of the threaded rod 15. The constraint post 17 restricts the rotation range of the toothed ring 13 to ensure that it only moves in the circumferential direction, avoiding transmission failure due to excessive rotation. The limit block 40 cooperates with the limit groove 41 to limit the rotation angle of the threaded tube 5, ensuring that the clamping plate 7 moves along a fixed trajectory and avoiding deviation. This allows for rapid positioning and clamping of mechanical parts.

[0035] Example 2: Please refer to Figures 1-8 Based on Embodiment 1, the surface of the fixed ring 3 is provided with an adaptive switching mechanism. The adaptive switching mechanism includes a rotating shaft 8 rotatably connected to the outer surface of the fixed ring 3 via a bearing seat, a switching gear 9 sleeved on the surface of the rotating shaft 8, a first magnetic ring 10 fixedly connected to one side of the switching gear 9, and a fixed shaft 18 movably connected to the surface of the threaded tube 5 via a bearing seat. A cam 19 and a third gear 20 are fixedly connected sequentially from front to back on the surface of the fixed shaft 18. A toothed plate 21 meshes with the surface of the third gear 20. One side of the toothed plate 21 is fixedly connected to one side of the clamping plate 7. A first spring 22 is sleeved on the surface of the toothed plate 21. 2. Both ends are fixedly connected to the mounting plate 6 and the clamping plate 7 respectively. A support plate 26 is fixedly connected to one side of the fixing ring 3. A telescopic rod 27 is fixedly connected to one side of the support plate 26. An extension block 28 is fixedly connected to the other end of the telescopic rod 27. A drive wheel 29 is fixedly connected to one side of the extension block 28. A sliding hole is opened on the surface of the support plate 26, and a sliding rod 30 is slidably connected to the inner cavity of the sliding hole. A drive block 31 is fixedly connected to one end of the sliding rod 30. A drive rod 32 is fixedly connected to one side of the drive block 31. A second spring 33 is sleeved on the surface of the telescopic rod 27. A third spring 34 is sleeved on the surface of the sliding rod 30. A ball is provided at the other end of the drive rod 32.

[0036] Further details: The extension block 28 and the slider 25 are slidably connected. When the clamping plate 7 contacts the part, the clamping plate 7 drives the third gear 20 to rotate via the toothed plate 21. The third gear 20 drives the cam 19 to rotate via the fixed shaft 18. The cam 19 pushes the extension block 28 via the slider 25. The telescopic rod 27 limits the extension block 28, causing it to move horizontally. The extension block 28 drives the drive rod 32 to move via the drive wheel 29 and the drive block 31. The drive rod 32 pushes the switching gear 9 to move. When the clamping plate 7 contacts the stroke block 23, the cam 19 rotates 90 degrees, and the drive rod 32 pushes the switching gear 9 to completely disengage from the second gear 16, ending the corresponding threaded tube 5 travel distance. The stroke block 23 limits the maximum movement distance of the clamping plate 7 to prevent overpressure damage to the first spring 22. The slider 25 cooperates with the slide groove 24 to... The extension block 28 is limited to move axially, allowing the clamping plate 7 to conform to the outer contour of the part, accommodating parts of different sizes. The slide rod 30 engages with the sliding hole to limit the drive block 31. The second spring 33 acts on the extension block 28 to facilitate its reset, and the third spring 34 facilitates the reset of the slide rod 30. The ball bearings reduce the frictional resistance between the drive rod 32 and the switching gear 9. When clamping irregular mechanical parts, the adaptive switching mechanism can automatically switch whether the corresponding threaded rod 15 is driven according to the surface contour of the mechanical part. In conjunction with the clamping mechanism, irregular parts can be clamped and fixed within a certain range. Moreover, this device can be implemented with a single motor and without sensors, avoiding the high economic cost caused by multi-motor drive and the damage to sensors caused by the high temperature generated during the operation of welding equipment, which would reduce their accuracy.

[0037] Example 3: Please refer to Figures 1-8 Based on Embodiments 1 and 2, a travel block 23 is fixedly connected between the mounting plate 6 and the clamping plate 7. A sliding groove 24 is provided on one side of the mounting plate 6. A slider 25 is slidably connected inside the sliding groove 24. An energizing block 38 is fixedly connected inside the housing 1. A second magnetic ring 39 is fixedly connected to the bottom of the threaded tube 5. The second magnetic ring 39 is an electromagnetic ring. The magnetic poles of the first magnetic ring 10 and the second magnetic ring 39 are designed to be opposite. A locking block 35 is fixedly connected to the surface of the rotating shaft 8. A locking groove 36 is fixedly connected to the shaft center of the switching gear 9. A fourth spring 37 is fixedly connected to one side of the locking block 35. The other end of the fourth spring 37 is fixedly connected to one side of the switching gear 9.

[0038] Further details: The locking block 35 cooperates with the locking slot 36 to ensure that the switching gear 9 maintains power transmission during its sliding on the rotating shaft 8. The fourth spring 37 provides elastic force to keep the switching gear 9 engaged when there is no external force, allowing it to mesh with the rack 14 and the second gear 16. The energizing block 38 supplies power to the second magnetic ring 39. When the threaded tube 5 is reset to the designated position, the second magnetic ring 39 contacts the energizing block 38. After being energized, the second magnetic ring 39 generates a repulsive force, which, in conjunction with the first magnetic ring 10, causes the switching gear 9 to move outward, disengaging it from the rack 14 and the second gear 16, thus releasing power transmission and ensuring the reset effect of the threaded tube 5. The operation is simple and improves the clamping efficiency of the parts.

[0039] The working principle of this invention is as follows: The part is placed in the fixing ring 3, and then the control panel 2 starts the drive motor 11. The output shaft of the drive motor 11 drives the first gear 12 to rotate, and the first gear 12 drives the toothed ring 13 to rotate, pushing the toothed ring 13 to translate in the circumferential direction (the constraint post 17 restricts its rotation). The rack 14 on the surface of the toothed ring 13 moves synchronously, driving the switching gear 9 to rotate. The switching gear 9 drives the threaded rod 15 to rotate through the second gear 16. The threaded rod 15 moves axially through the through groove 4 of the threaded tube 5 (the limiting block 40 cooperates with the limiting groove 41 to restrict the threaded tube 5 to only move axially). The threaded tube 5 pushes the mounting plate 6 and the clamping plate 7 to move towards the center of the chassis 1, initially clamping the part.

[0040] When the clamping plate 7 contacts the part (such as a protrusion or depression), the clamping plate 7 drives the third gear 20 to rotate through the toothed plate 21. The third gear 20 drives the cam 19 to rotate through the fixed shaft 18. The cam 19 pushes the extension block 28 through the slider 25. The telescopic rod 27 limits the extension block 28, causing it to move horizontally. The extension block 28 drives the drive rod 32 to move through the drive wheel 29 and the drive block 31. The drive rod 32 pushes the switching gear 9 to move. When the clamping plate 7 contacts the stroke block 23, the cam 19 rotates ninety degrees. The drive rod 32 pushes the switching gear 9 to completely disengage from the second gear 16, ending the stroke distance of the corresponding threaded tube 5. When all the switching gears 9 disengage, the clamping of irregular parts can be completed.

[0041] When reset is required, simply remove the irregular part. The first spring 22 acts on the clamping plate 7, which in turn drives the fixed shaft 18 to rotate via the toothed plate 21 and the third gear 20. The fixed shaft 18 drives the cam 19 to rotate, which contacts the slider 25 and limits its position. The second spring 33 engages with the extension block 28, which resets. The third spring 34 resets the drive block 31, which in turn drives the drive rod 32 to reset. The fourth spring 37 acts on the switching gear 9, causing the switching gear 9 to mesh with the second gear 16 and the rack 14. At this time, the drive motor 11 rotates in the opposite direction, causing all the threaded tubes 5 to move outward.

[0042] Since the feed distance of the threaded tube 5 is different at this time, when the threaded tube 5 is reset to the designated position, it contacts the energized block 38 through the second magnetic ring 39 fixedly connected to the surface. At this time, the energized block 38 supplies power to the second magnetic ring 39. After the second magnetic ring 39 is energized, it generates a repulsive force to drive it. In conjunction with the first magnetic ring 10, it causes the switching gear 9 to move outward, so that it disengages from the rack 14 and the second gear 16, and the power transmission is released. After all the threaded tubes 5 are reset, the drive motor 11 is stopped, and then all the energized blocks 38 are de-energized. Under the action of the fourth spring 37, the switching gear 9 is made to mesh with the rack 14 and the second gear 16. Then, the above operation is repeated to achieve the clamping and fixing of the next part.

[0043] This device achieves adaptive clamping by using a single motor and without the need for sensors, avoiding the high economic costs caused by multi-motor drives and the damage to sensors caused by the high temperatures generated during welding equipment operation, which would reduce their accuracy.

[0044] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A positioning device for welding equipment used in machining mechanical parts, comprising a housing (1), characterized in that: The front of the chassis (1) is provided with a control panel (2); The inner cavity of the chassis (1) is provided with a clamping mechanism, which includes a fixing ring (3) fixedly connected to the inner cavity of the chassis (1), a through groove (4) opened on the surface of the fixing ring (3), a threaded tube (5) provided in the inner cavity of the through groove (4), a mounting plate (6) fixedly connected to one end of the threaded tube (5), and a clamping plate (7) provided on one side of the mounting plate (6). The surface of the fixed ring (3) is provided with an adaptive switching mechanism. The adaptive switching mechanism includes a rotating shaft (8) rotatably connected to the outer surface of the fixed ring (3) through a bearing seat, a switching gear (9) sleeved on the surface of the rotating shaft (8), and a first magnetic ring (10) fixedly connected to one side of the switching gear (9). A drive motor (11) is fixedly connected to the inner cavity of the chassis (1). A first gear (12) is fixedly connected to the output shaft of the drive motor (11). A toothed ring (13) meshes with the surface of the first gear (12). A rack (14) is fixedly connected to the surface of the toothed ring (13). A threaded rod (15) is threadedly connected to the inner cavity of the threaded tube (5). A second gear (16) is fixedly connected to the surface of the threaded rod (15). The threaded tube (5) is movably connected to a fixed shaft (18) via a bearing seat. From front to back, a cam (19) and a third gear (20) are fixedly connected to the surface of the fixed shaft (18). A toothed plate (21) meshes with the surface of the third gear (20). One side of the toothed plate (21) is fixedly connected to one side of the clamping plate (7). A first spring (22) is sleeved on the surface of the toothed plate (21). The two ends of the first spring (22) are fixedly connected to one side of the mounting plate (6) and the clamping plate (7), respectively. A travel block (23) is fixedly connected between the mounting plate (6) and the clamping plate (7). A sliding groove (24) is provided on one side of the mounting plate (6), and a slider (25) is slidably connected to the inner cavity of the sliding groove (24). A support plate (26) is fixedly connected to one side of the fixed ring (3), a telescopic rod (27) is fixedly connected to one side of the support plate (26), an extension block (28) is fixedly connected to the other end of the telescopic rod (27), a drive wheel (29) is fixedly connected to one side of the extension block (28), a sliding hole is provided on the surface of the support plate (26), and a sliding rod (30) is slidably connected to the inner cavity of the sliding hole, a drive block (31) is fixedly connected to one end of the sliding rod (30), and a drive rod (32) is fixedly connected to one side of the drive block (31). An electric block (38) is fixedly connected to the inner cavity of the chassis (1), and a second magnetic ring (39) is fixedly connected to the bottom of the threaded tube (5). The second magnetic ring (39) is an electromagnetic ring, and the magnetic poles of the first magnetic ring (10) and the second magnetic ring (39) are designed to be opposite.

2. The positioning device for welding equipment used in machining mechanical parts according to claim 1, characterized in that: The toothed ring (13) is fixedly connected to one side of a constraint post (17). There are eight constraint posts (17) arranged in a circular array. The other end of the constraint post (17) is slidably connected to the inner cavity of the chassis (1).

3. The positioning device for welding equipment used in machining mechanical parts according to claim 1, characterized in that: The surface of the telescopic rod (27) is fitted with a second spring (33), the surface of the slide rod (30) is fitted with a third spring (34), and the other end of the drive rod (32) is provided with a ball bearing.

4. The positioning device for welding equipment used in machining mechanical parts according to claim 1, characterized in that: A locking block (35) is fixedly connected to the surface of the rotating shaft (8), and a locking groove (36) is fixedly connected to the shaft center of the switching gear (9). A fourth spring (37) is fixedly connected to one side of the locking block (35), and the other end of the fourth spring (37) is fixedly connected to one side of the switching gear (9).

5. A positioning device for welding equipment used in machining mechanical parts according to claim 1, characterized in that: The threaded pipe (5) is fixedly connected to a limiting block (40), and the inner cavity of the through groove (4) is provided with a limiting groove (41) that is compatible with the limiting block (40).

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