A device for welding a sleeve to a part

Abstract

This invention relates to the field of welding technology, specifically disclosing a welding processing device for a sleeve, applied to the processing of circumferential welds in assemblies. The device includes: a machine base; a rotating tooling unit; a sleeve pressing unit; a pressing drive unit; and a welding unit. A telescopic rod at the bottom of the pressure rod automatically triggers a flexible centering component in the hollow column to radially expand the hollow column from the inside, simultaneously triggering a radial expansion component in the sleeve to tighten the sleeve from the inside. During axial pressing, automatic centering and circumferential locking of the hollow column and sleeve are achieved, improving the circumferential uniformity and welding position accuracy of the circumferential weld. The radial expansion component continuously supports the sleeve from the inside during welding, preventing radial contraction or circumferential displacement due to heat input. Simultaneously, an air blowing component continuously blows air around the weld area, promptly removing weld slag, accelerating the cooling of the weld and surrounding materials, effectively suppressing hot melt deformation of the sleeve caused by high welding temperatures, and ensuring stable assembly dimensions.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically, to a welding processing apparatus for welding sleeves of parts. Background Technology

[0002] Currently, it is necessary to weld the annular weld formed after the hollow column and the sleeve are coaxially assembled. Traditional tooling often uses step-by-step, external clamping positioning, which requires fixing the hollow column first, then inserting and pressing the sleeve. The assembly gap and eccentricity between the inner and outer parts result in unevenness in the circumferential direction of the annular weld. When performing continuous welding of the annular weld, if the workpiece is rotated, the hollow column and the sleeve are prone to circumferential slippage or vibration, resulting in weld tearing or poor formation. In addition, the thin-walled sleeve is extremely sensitive to welding heat input. The concentrated heat generated by continuous welding can easily cause local hot melt indentation or overall radial shrinkage deformation of the sleeve, resulting in workpiece dimensions exceeding tolerance and failing to meet the requirements of high-precision assembly. Summary of the Invention

[0003] To overcome the above-mentioned technical problems, the present invention proposes a welding processing device for welding sleeves of parts.

[0004] The objective of this invention can be achieved through the following technical solutions: A welding processing device for welding sleeves of parts is applied to the welding processing of assemblies, the assemblies including coaxially adapted hollow columns and sleeves, and the joint of the hollow columns and sleeves forms an annular weld. The welding processing apparatus includes: Machine tool; A rotating tooling unit includes a mounting sleeve fixed to a machine base and a tooling table rotatably embedded in the mounting sleeve, wherein an air blowing component is provided on the tooling table facing the circumferential weld. The sleeve pressing unit is vertically mounted directly above the tooling table. It includes a sleeve assembly and a pressure rod rotatably embedded in the sleeve assembly. A telescopic rod is movably mounted at the lower end of the pressure rod. The telescopic rod is connected to a sleeve radial expansion member adapted to the sleeve and a hollow column flexible centering member adapted to the hollow column. The top pressure drive unit is mounted on the machine base and is used to drive the sleeve top pressure unit to move up and down. The welding unit, which is mounted on the top pressure drive unit, is used to perform welding processing on the circumferential weld seam.

[0005] As a further embodiment of the present invention: the rotary tooling unit further includes a reducer and a rotary motor installed at the bottom of the mounting sleeve, the output end of the rotary motor being connected to the input end of the reducer, and the output end of the reducer being connected to the tooling table.

[0006] As a further embodiment of the present invention: the top pressure drive unit includes a support frame fixed on the machine base, a top pressure cylinder is installed on the support frame, the extended end of the top pressure cylinder is connected to a mounting plate, and lifting guide rods that slide through the support frame are vertically installed at both ends of the mounting plate. The kit and welding unit are both fixedly installed on the lower end face of the mounting plate.

[0007] As a further aspect of the present invention: the air blowing component includes a central connecting cavity opened at the center of the tooling table and a conical air blowing platform disposed on the upper surface of the tooling table. The conical air blowing platform has an annular air cavity, and a plurality of communicating air channels are provided between the central connecting cavity and the annular air cavity. The conical air blowing platform has a plurality of air blowing holes in the inner circumferential direction that communicate with the annular air cavity, and the air outlet of the air blowing hole is directly opposite the annular weld.

[0008] As a further aspect of the present invention: a first central air passage is axially penetrated inside the pressure rod, and a telescopic cavity for accommodating the telescopic rod is provided at the lower end of the first central air passage. An air supply component adapted to the central connecting cavity is provided inside the telescopic rod, and the upper end of the air supply component is connected to the first central air passage.

[0009] As a further aspect of the present invention: the air supply component includes a second central air passage axially opened within the telescopic rod, the upper end of the second central air passage being connected to the first central air passage, and the lower end sidewall of the second central air passage being provided with a plurality of through holes that communicate with the connecting air passage.

[0010] As a further aspect of the present invention: the kit includes a sealing sleeve fitted onto the upper end of the pressure rod, a bearing seat adapted to the pressure rod is installed on the sealing sleeve, an air supply chamber communicating with the first central air passage is opened inside the sealing sleeve, and an air pipe communicating with the inside of the air supply chamber is connected to one side of the sealing sleeve.

[0011] As a further aspect of the present invention: the hollow column flexible centering component includes a first sealing ring fixed to the lower end of the pressure rod and a second sealing ring fixedly sleeved on the telescopic rod. The inner side of the first sealing ring is slidably sealed to the outer circumferential surface of the telescopic rod, and a flexible airbag is connected between the first sealing ring and the second sealing ring.

[0012] As a further embodiment of the present invention: the pressure rod has an installation cavity, and several sets of radial expansion members of the sleeve are arranged circumferentially within the installation cavity. The radial expansion members of the sleeve include an L-shaped bracket fixed within the installation cavity. The L-shaped bracket has vertically distributed axial grooves and radial grooves respectively. An axial slider is slidably embedded in the axial groove. The axial slider is fixedly connected to the telescopic rod through a connecting rod. A radial slider is slidably embedded in the radial groove. A radial expansion plate is fixedly mounted on the radial slider. A slot for accommodating the radial expansion plate is opened on the outside of the installation cavity. A connecting rod is hinged between the axial slider and the radial slider.

[0013] As a further aspect of the present invention: the welding unit includes a fixed frame fixed to the mounting plate, a fine-tuning slide rail is inclinedly arranged on the fixed frame, a slide table is slidably mounted on the fine-tuning slide rail, a fine-tuning cylinder for driving the slide table is installed on the top of the fixed frame, and a welding torch is detachably mounted on the slide table via a clamping bracket.

[0014] The beneficial effects of this invention are: The telescopic rod at the bottom of the pressure rod automatically triggers the flexible centering component of the hollow column to radially expand the hollow column from the inside, and at the same time triggers the radial expansion component of the sleeve to tighten the sleeve from the inside. During the axial pressing process, the hollow column and the sleeve are automatically aligned and circumferentially locked, ensuring that the assembly, tooling table and pressure rod are coaxial, fundamentally improving the circumferential uniformity and welding position accuracy of the circumferential weld. During the welding process, the radial expansion component of the sleeve continuously supports the sleeve from the inside to prevent it from radially shrinking or circumferentially shifting due to heat input. At the same time, the air blowing component continuously blows air around the weld area, which can not only promptly blow away the welding slag and purify the welding area, but also accelerate the cooling of the weld and surrounding materials, effectively suppressing the hot melt deformation of the sleeve caused by the high temperature of welding, and ensuring the stability of the assembly dimensions. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram from another perspective of the present invention; Figure 3 This is a schematic diagram of the rotating tooling unit in this invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the casing pressing unit in this invention; Figure 6 for Figure 5 Enlarged view at point B in the middle; Figure 7 This is a cross-sectional view of the tooling table and the air blowing component in this invention; Figure 8 for Figure 7 Enlarged view at point C; Figure 9 This is a cross-sectional view of the casing pressing unit in this invention; Figure 10 for Figure 9 Enlarged view at point D; Figure 11 for Figure 9 Enlarged view at point E in the middle; Figure 12 This is a partial structural diagram of the pressure bar in this invention; Figure 13 for Figure 12 Enlarged view at point F; Figure 14 This is a schematic diagram of the welding unit in this invention.

[0017] In the picture: 100. Machine tool; 200. Rotary tooling unit; 210. Mounting sleeve; 220. Reducer; 230. Rotary motor; 240. Tooling table; 250. Air blowing component; 251. Central connecting cavity; 252. Conical air blowing platform; 253. Annular air chamber; 254. Connecting air passage; 255. Air blowing hole; 300. Sleeve top pressure unit; 310. Sleeve assembly; 311. Sealing sleeve; 312. Bearing housing; 313. Air supply chamber; 314. Air pipe; 320. Pressure rod; 321. First central air passage; 322. Telescopic chamber; 323. Mounting chamber; 324. Groove; 330. Telescopic rod; 340. Sleeve radial expansion component; 341. L-shaped bracket; 342. Axial slide groove; 343. Radial slide groove; 344. Axial slider; 345. Connecting rod; 346. Radial slider; 347. Radial expansion plate; 348. Connecting rod; 350. Hollow column flexible centering component; 351. First sealing ring; 352. Second sealing ring; 353. Flexible airbag; 360. Air supply component; 361. Second central air passage; 362. Through hole; 400. Top pressure drive unit; 410. Support frame; 420. Top pressure cylinder; 430. Mounting plate; 440. Lifting guide rod; 500 Welding unit; 510 Fixture; 520 Fine-tuning slide rail; 530 Slide table; 540 Fine-tuning cylinder; 550 Clamping frame; 560 Welding torch; 600. Assembly parts; 610. Hollow column; 620. Sleeve; 630. Circumferential weld. Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0019] Please see Figure 1 , Figure 2 and Figure 4The present invention discloses a welding sleeve welding processing device for parts, which is applied to the welding processing of assembly 600. The assembly 600 includes a coaxially adapted hollow column 610 and a sleeve 620, and an annular weld 630 is formed at the splice of the hollow column 610 and the sleeve 620. Please see Figure 3 , Figure 4 , Figure 5 and Figure 6 The welding processing device includes a machine base 100, a rotary tooling unit 200, a sleeve pressing unit 300, a pressing drive unit 400, and a welding unit 500. The rotary tooling unit 200 includes a mounting sleeve 210 fixed on the machine base 100 and a tooling table 240 rotatably embedded in the mounting sleeve 210. An air blowing component 250 facing the annular weld 630 is provided on the tooling table 240. The sleeve pressing unit 300 is movably arranged directly above the tooling table 240 and includes a sleeve component 310 and a pressure rod 320 rotatably embedded in the sleeve component 310. A telescopic rod 330 is movably provided at the lower end of the pressure rod 320. A sleeve radial expansion component 340 adapted to the sleeve 620 and a hollow column flexible centering component 350 adapted to the hollow column 610 are respectively connected to the outside of the telescopic rod 330. The top pressure drive unit 400 is mounted on the machine base 100 and is used to drive the sleeve top pressure unit 300 to move up and down; the welding unit 500 is mounted on the top pressure drive unit 400 and is used to perform welding processing on the circumferential weld 630. Specifically, the hollow column 610 is first placed at the center of the tooling table 240, and then the sleeve 620 is put on the outside of the hollow column 610 from the top to form the assembly 600. The lower end of the sleeve 620 and the hollow column 610 abut against each other to form an annular weld 630 to be processed. The top-pressing drive unit 400 drives the entire casing top-pressing unit 300 and welding unit 500 to descend vertically. The lower end of the pressure rod 320 applies axial force to the casing 620 for vertical pressing. Simultaneously, the telescopic rod 330 vertically passes through the casing 620 and inserts into the hollow column 610. When the telescopic rod 330 contacts the tooling table 240, it gradually retracts into the pressure rod 320, thereby triggering the flexible centering component 350 to radially expand and position the hollow column 610 from within, thus ensuring the stability of the entire assembly 600, tooling table 240, and pressure rod. The coaxiality of rod 320 improves the welding accuracy of the subsequent annular weld 630. At the same time, the telescopic rod 330 triggers the radial expansion member 340 of the sleeve to radially expand and fix the sleeve 620 from the inside, preventing the sleeve 620 and the pressure rod 320 from deflecting relative to each other in the circumferential direction, which would affect the continuous welding of the annular weld 630. Then, the rotating tooling unit 200 drives the entire assembly 600 and the pressure rod 320 to rotate synchronously in the circumferential direction with the tooling table 240, and the welding unit 500 can perform continuous circumferential welding at the annular weld 630. During the welding process, the air blowing component 250 surrounding the assembly 600 blows air around the circumferential weld 630 to remove welding slag from the welding area. At the same time, the airflow accelerates the cooling of the welding rod to prevent the sleeve 620 from undergoing hot melt deformation, which would affect the assembly accuracy of the assembly 600.

[0020] It should be noted that the present invention automatically triggers the flexible centering component 350 of the hollow column 610 to perform radial flexible expansion from the inside by means of the telescopic rod 330 set at the bottom of the pressure rod 320, and at the same time triggers the radial expansion component 340 of the sleeve to tighten the sleeve 620 from the inside. During the axial pressing process, the hollow column 610 and the sleeve 620 are automatically aligned and circumferentially locked, ensuring that the assembly 600, the tooling table 240 and the pressure rod 320 are coaxial, fundamentally improving the circumferential uniformity and welding position accuracy of the annular weld 630. During the welding process, the radial expansion member 340 continuously supports the sleeve 620 from the inside to prevent it from radially shrinking or circumferentially shifting due to heat input. At the same time, the air blowing member 250 continuously blows air around the weld area, which can not only promptly blow away the welding slag and purify the welding area, but also accelerate the cooling of the weld and surrounding materials, effectively suppressing the hot melt deformation of the sleeve 620 caused by the high temperature of welding, and ensuring the stability of the assembly dimensions.

[0021] In one embodiment, please refer to Figure 1 and Figure 2 The rotary tooling unit 200 also includes a reducer 220 and a rotary motor 230 installed at the bottom of the mounting sleeve 210. The output end of the rotary motor 230 is connected to the input end of the reducer 220, and the output end of the reducer 220 is connected to the tooling table 240. Specifically, the rotary motor 230 outputs torque, which is reduced by the reducer 220 and then transmitted to the tooling table 240, thereby driving the tooling table 240 to rotate slowly and uniformly relative to the mounting sleeve 210, so as to realize the circumferential continuous welding process of the annular weld 630.

[0022] Further, please refer to Figure 2 The top pressure drive unit 400 includes a support frame 410 fixed on the machine base 100. A top pressure cylinder 420 is installed on the support frame 410. The extended end of the top pressure cylinder 420 is connected to a mounting plate 430. Lifting guide rods 440 that slide through the support frame 410 are vertically installed at both ends of the mounting plate 430. The kit 310 and the welding unit 500 are both fixedly installed on the lower end face of the mounting plate 430. Specifically, the mounting plate 430 is driven vertically downward by the top pressure cylinder 420, and the mounting plate 430 is vertically guided by the lifting guide rod 440, thereby driving the entire sleeve top pressure unit 300 and welding unit 500 to descend vertically synchronously. When the lower end of the pressure rod 320 presses against the top of the sleeve 620, the welding unit 500 just reaches the welding position of the annular weld 630. Then, the tooling table 240 is driven to rotate circumferentially by the rotary motor 230, so that the circumferential welding of the annular weld 630 can be realized.

[0023] It is worth noting that the rotary motor 230, in conjunction with the reducer 220, drives the tooling table 240 to rotate slowly and uniformly, ensuring that the linear speed of the annular weld 630 is stable during the welding process, avoiding defects such as uneven weld penetration and undercut caused by non-uniform rotation, and improving the consistency and reliability of weld formation. The top-pressure cylinder 420 synchronously drives the sleeve top-pressure unit 300 and the welding unit 500 to descend vertically via the mounting plate 430. The lifting guide rod 440 provides rigid guidance, ensuring that while the pressure rod 320 presses against the sleeve 620, the welding unit 500 is precisely aligned with the circumferential weld 630, achieving simultaneous pressing, centering, and welding preparation. Under the synergy of uniform rotation and precise lifting, the hollow column flexible centering component 350 and the sleeve radial expansion component 340 continuously maintain the radial positioning of the parts, and the air blowing component 250 provides synchronous circumferential cooling, thereby effectively suppressing thermal deformation and vibration offset, which is particularly suitable for thin-walled circumferential welds with high precision requirements.

[0024] In yet another embodiment, please refer to Figure 7 and Figure 8The air blowing component 250 includes a central connecting cavity 251 located at the center of the tooling table 240 and a conical air blowing platform 252 located on the upper surface of the tooling table 240. An annular air chamber 253 is provided inside the conical air blowing platform 252. A plurality of connecting air passages 254 are provided between the central connecting cavity 251 and the annular air chamber 253. A plurality of air blowing holes 255 communicating with the annular air chamber 253 are provided in the circumferential direction inside the conical air blowing platform 252. The air outlet of the air blowing hole 255 is directly opposite the annular weld 630. Specifically, the air source is introduced into the central connecting cavity 251, and then the airflow enters the annular air cavity 253 through each connecting air passage 254. Finally, the airflow is ejected circumferentially from each blowing hole 255, thereby performing annular airflow purging on the annular weld 630.

[0025] Further, please refer to Figure 9 and Figure 10 The pressure rod 320 has an axially penetrating first central air passage 321. The lower end of the first central air passage 321 is provided with a telescopic cavity 322 for accommodating the telescopic rod 330. The telescopic rod 330 is provided with an air supply component 360 adapted to the central connecting cavity 251. The upper end of the air supply component 360 is connected to the first central air passage 321. Please see Figure 10 The air supply component 360 includes a second central air passage 361 axially opened in the telescopic rod 330. The upper end of the second central air passage 361 is connected to the first central air passage 321. The lower end side wall of the second central air passage 361 is provided with a plurality of through holes 362 that are connected to the connecting air passage 254. Please see Figure 9 and Figure 11 The assembly 310 includes a sealing sleeve 311 fitted onto the upper end of the pressure rod 320. A bearing seat 312 adapted to the pressure rod 320 is installed on the sealing sleeve 311. An air supply chamber 313 communicating with the first central air passage 321 is opened inside the sealing sleeve 311. An air pipe 314 communicating with the inside of the air supply chamber 313 is connected to one side of the sealing sleeve 311. Specifically, high-pressure air is introduced into the air supply chamber 313 through the air pipe 314, and then the airflow enters the blowing component 250 through the first central air passage 321 and the second central air passage 361. In this way, even if the pressure rod 320 rotates circumferentially relative to the sleeve 310, it can ensure uninterrupted air supply to the continuously rotating blowing component 250.

[0026] It should be noted that a through air passage from the fixed component to the rotating tooling table 240 is constructed through the first central air passage 321 in the pressure rod 320, the second central air passage 361 in the telescopic rod 330, and the air supply chamber 313 and air pipe 314 on the assembly 310, so that the high-pressure airflow can pass through the rotating interface. Even when the pressure rod 320 and the assembly 600 rotate synchronously with the tooling table 240, the air blowing component 250 can still be supplied with air continuously, ensuring the continuous and stable welding and cooling process. The airflow is finally ejected through the annular air chamber 253 inside the conical air blowing platform 252 and the circumferentially distributed air blowing holes 255, forming a uniform and stable annular airflow barrier around the annular weld 630. This not only efficiently blows away welding spatter and fumes, keeping the weld area clean, but also achieves uniform and controllable cooling of the weld and heat-affected zone, effectively suppressing local overheating and reducing welding deformation and residual stress. The stable and uniform annular air blowing directly acts on the high-temperature weld, which can accelerate the solidification of the molten pool, refine the weld structure, and reduce oxidation tendency.

[0027] In further embodiments, please refer to Figure 12 The hollow column flexible centering member 350 includes a first sealing ring 351 fixed to the lower end of the pressure rod 320 and a second sealing ring 352 fixedly sleeved on the telescopic rod 330. The inner side of the first sealing ring 351 is slidably sealed to the outer peripheral surface of the telescopic rod 330. A flexible airbag 353 is connected between the first sealing ring 351 and the second sealing ring 352. Specifically, when the lower end of the telescopic rod 330 is inserted into the central connecting cavity 251, the telescopic rod 330 cannot continue to descend relative to the tooling table 240, and the lower end of the pressure rod 320 has not yet contacted the sleeve 620. As the pressure rod 320 continues to descend, the upper end of the telescopic rod 330 gradually retracts into the telescopic cavity 322, thereby driving the second sealing ring 352 to move upward synchronously and approach the first sealing ring 351, thereby axially compressing the flexible airbag 353, causing the flexible airbag 353 to undergo radial outward deformation. The radially expanded flexible airbag 353 is used to circumferentially expand and center the inner wall of the hollow column 610, so that the entire assembly 600 is aligned with the tooling table 240 and the pressure rod 320, ensuring that the distance between each area of ​​the annular weld 630 and the welding unit 500 remains constant, and improving the welding processing accuracy.

[0028] It should be noted that by utilizing the relative displacement generated by the continuous downward movement of the pressure rod 320 and the obstruction of the telescopic rod 330, the first sealing ring 351 and the second sealing ring 352 are automatically driven to approach each other axially, thereby compressing the flexible airbag 353 and causing it to expand radially and uniformly. This allows the flexible airbag 353 to fit tightly against the inner wall of the hollow column 610, achieving automatic alignment between the assembly 600, the tooling table 240, and the pressure rod 320. This ensures that the distance and height between each point on the circumference of the annular weld 630 and the welding unit 500 are consistent, effectively improving the accuracy of the welding trajectory. The flexible airbag 353 undergoes elastic deformation under pressure, and contacts the inner wall of the hollow column 610 with uniform surface pressure, avoiding scratches, deformation or stress concentration that may be caused by traditional rigid expansion. It is particularly suitable for positioning of hollow columns 610 with high surface precision requirements or thin walls. The first sealing ring 351 and the telescopic rod 330 maintain a sliding seal, ensuring the airtightness of the internal air passage through the pressure rod 320 and the telescopic rod 330 while achieving axial relative movement and radial alignment. The radial expansion force of the flexible airbag 353 depends on the downward stroke of the pressure rod 320 and the characteristics of the airbag itself. By adjusting the stroke or pressure of the top pressure drive unit 400, the magnitude of the alignment force can be indirectly controlled, thereby adapting to hollow columns 610 with different materials and wall thicknesses. The flexible support helps to suppress vibration and maintain positioning stability during the welding process, further ensuring the welding quality.

[0029] Further, please refer to Figure 12 and Figure 13 The pressure rod 320 has an installation cavity 323. Several sets of radial expansion members 340 are provided and circumferentially distributed in the installation cavity 323. The radial expansion member 340 includes an L-shaped bracket 341 fixed in the installation cavity 323. The L-shaped bracket 341 has vertically distributed axial grooves 342 and radial grooves 343. An axial slider 344 is slidably embedded in the axial groove 342. The axial slider 344 is fixedly connected to the telescopic rod 330 through a connecting rod 345. A radial slider 346 is slidably embedded in the radial groove 343. A radial expansion plate 347 is fixedly provided on the radial slider 346. A slot 324 for accommodating the radial expansion plate 347 is provided on the outside of the installation cavity 323. A connecting rod 348 is hinged between the axial slider 344 and the radial slider 346. Specifically, when the telescopic rod 330 retracts upward relative to the pressure rod 320, it can push the axial slider 344 to slide axially along the axial groove 342 through the connecting rod 345. Thus, under the transmission action of the connecting rod 348, the radial slider 346 is driven to slide radially along the radial groove 343, thereby driving the radial expansion plate 347 to extend radially from the groove 324 and contact the inner wall of the sleeve 620, thereby radially expanding and fixing the sleeve 620 to prevent the sleeve 620 and the pressure rod 320 from circumferentially deflecting relative to each other and causing weld tearing.

[0030] It is worth noting that by utilizing the retraction action of the telescopic rod 330 relative to the pressure rod 320, the axial slider 344 is driven by the connecting rod 345, and then the radial slider 346 and the radial expansion plate 347 are driven to extend radially via the connecting rod 348. Multiple sets of sleeve radial expansion members 340 are evenly distributed around the pressure rod 320, and their radial expansion plates 347 extend synchronously, which can apply a uniform and stable radial support force to the inner wall of the sleeve 620. The clamping method from the inside out effectively avoids the sleeve 620 from relative circumferential deflection or vibration with the pressure rod 320 during the rotation welding process, thereby ensuring that the annular weld 630 is continuous, uniform and tear-free. In addition, all expansion components are integrated inside the pressure bar 320, and the radial expansion plate 347 extends from the slot 324 only when needed, avoiding interference and obstruction that external fixtures may cause to the welding path, welding torch posture or protective airflow, which is conducive to achieving all-position circumferential welding.

[0031] Furthermore, please refer to Figure 14 The welding unit 500 includes a fixing frame 510 fixed on the mounting plate 430. A fine-tuning slide rail 520 is inclinedly arranged on the fixing frame 510. A slide table 530 is slidably installed on the fine-tuning slide rail 520. A fine-tuning cylinder 540 for driving the slide table 530 is installed on the top of the fixing frame 510. A welding torch 560 is detachably installed on the slide table 530 through a clamping frame 550. Specifically, when the top pressure drive unit 400 drives the sleeve top pressure unit 300 to move downward, it can drive the welding unit 500 to move downward synchronously. When the welding torch 560 reaches the position of the annular weld 630, the slide table 530 can be driven by the fine adjustment cylinder 540 to slide along the fine adjustment slide rail 520 for adjustment, thereby fine-tuning the welding point of the welding torch 560 and further improving the welding accuracy.

[0032] It should be noted that, based on the coarse positioning completed by the top pressure drive unit 400 (which moves the welding torch 560 to the vicinity of the annular weld 630), the independent fine-tuning cylinder 540 drives the slide table 530 to make precise displacement along the fine-tuning slide rail 520. This allows for millimeter-level or even sub-millimeter-level compensation and adjustment of the final spatial position of the welding torch 560 (especially the height and radial distance). This effectively eliminates the influence of part assembly tolerances, thermal deformation prediction deviations, or mechanism repetitive positioning errors on the absolute position of the weld. It ensures that the welding torch 560 and the annular weld 630 always maintain the theoretically optimal distance and angle, which is a key guarantee for obtaining high-consistency welding quality. The fine-tuning slide rail 520 is tilted, and through a single linear fine-tuning, it simultaneously changes the height and horizontal position of the welding torch 560, enabling it to be more accurately aligned along the normal direction of the weld section or at a predetermined welding angle.

[0033] The specific embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A welding processing device for welding sleeves of parts, applied to the welding processing of an assembly (600), the assembly (600) including a coaxially adapted hollow column (610) and a sleeve (620), the joint of the hollow column (610) and the sleeve (620) forming an annular weld (630). Its features are, The welding processing apparatus includes: Machine (100); The rotating tooling unit (200) includes a mounting sleeve (210) fixed on the machine base (100) and a tooling table (240) rotatably embedded in the mounting sleeve (210), wherein the tooling table (240) is provided with an air blowing component (250) facing the circumferential weld (630). The sleeve pressing unit (300) is vertically mounted directly above the tooling table (240). It includes a sleeve component (310) and a pressure rod (320) rotatably embedded in the sleeve component (310). A telescopic rod (330) is movably mounted at the lower end of the pressure rod (320). The telescopic rod (330) is connected to a sleeve radial expansion component (340) adapted to the sleeve (620) and a hollow column flexible centering component (350) adapted to the hollow column (610) respectively. A top pressure drive unit (400) is mounted on the machine base (100) and is used to drive the sleeve top pressure unit (300) to move up and down. A welding unit (500), which is mounted on a top pressure drive unit (400), is used to perform welding processing on the circumferential weld (630).

2. The welding processing device for welding sleeves of parts according to claim 1, characterized in that, The rotary tooling unit (200) also includes a reducer (220) and a rotary motor (230) installed at the bottom of the mounting sleeve (210). The output end of the rotary motor (230) is connected to the input end of the reducer (220), and the output end of the reducer (220) is connected to the tooling table (240).

3. The welding processing device for welding sleeves of parts according to claim 1, characterized in that, The top pressure drive unit (400) includes a support frame (410) fixed on the machine base (100), a top pressure cylinder (420) is installed on the support frame (410), the extended end of the top pressure cylinder (420) is connected to a mounting plate (430), and lifting guide rods (440) that slide through the support frame (410) are vertically installed at both ends of the mounting plate (430). The kit (310) and the welding unit (500) are both fixedly installed on the lower end face of the mounting plate (430).

4. The welding processing device for welding sleeves of parts according to claim 1, characterized in that, The air blowing component (250) includes a central connecting cavity (251) located at the center of the tooling table (240) and a conical air blowing platform (252) located on the upper surface of the tooling table (240). An annular air chamber (253) is provided inside the conical air blowing platform (252). A plurality of connecting air channels (254) are provided between the central connecting cavity (251) and the annular air chamber (253). A plurality of air blowing holes (255) communicating with the annular air chamber (253) are provided in the circumferential direction inside the conical air blowing platform (252). The air outlet of the air blowing hole (255) is directly opposite the annular weld (630).

5. The welding processing device for welding sleeves of parts according to claim 4, characterized in that, The pressure rod (320) has an axially penetrating first central air passage (321). The lower end of the first central air passage (321) is provided with a telescopic cavity (322) for accommodating the telescopic rod (330). The telescopic rod (330) is provided with an air supply component (360) adapted to the central connecting cavity (251). The upper end of the air supply component (360) is connected to the first central air passage (321).

6. The welding processing device for welding sleeves of parts according to claim 5, characterized in that, The air supply component (360) includes a second central air passage (361) axially opened in the telescopic rod (330). The upper end of the second central air passage (361) is connected to the first central air passage (321). The lower end side wall of the second central air passage (361) is provided with a plurality of through holes (362) that are connected to the connecting air passage (254).

7. The welding processing device for welding sleeves of parts according to claim 5, characterized in that, The assembly (310) includes a sealing sleeve (311) fitted onto the upper end of the pressure rod (320). A bearing seat (312) adapted to the pressure rod (320) is installed on the sealing sleeve (311). An air supply chamber (313) communicating with the first central air passage (321) is opened inside the sealing sleeve (311). An air pipe (314) communicating with the inside of the air supply chamber (313) is connected to one side of the sealing sleeve (311).

8. The welding processing device for welding sleeves of parts according to claim 1, characterized in that, The hollow column flexible centering component (350) includes a first sealing ring (351) fixed to the lower end of the pressure rod (320) and a second sealing ring (352) fixedly sleeved on the telescopic rod (330). The inner side of the first sealing ring (351) is slidably sealed to the outer circumferential surface of the telescopic rod (330), and a flexible airbag (353) is connected between the first sealing ring (351) and the second sealing ring (352).

9. The welding processing device for welding sleeves of parts according to claim 1, characterized in that, The pressure rod (320) has an installation cavity (323) inside. Several sets of radial expansion members (340) of the sleeve are arranged circumferentially within the installation cavity (323). The radial expansion member (340) of the sleeve includes an L-shaped bracket (341) fixed in the installation cavity (323). The L-shaped bracket (341) has vertically distributed axial grooves (342) and radial grooves (343) inside. An axial slider (34) is slidably embedded in the axial groove (342). 4) The axial slider (344) is fixedly connected to the telescopic rod (330) via the connecting rod (345). The radial slider (346) is slidably embedded in the radial groove (343). The radial expansion plate (347) is fixedly installed on the radial slider (346). The mounting cavity (323) has a slot (324) for accommodating the radial expansion plate (347) on its outer side. The axial slider (344) and the radial slider (346) are hinged together by a connecting rod (348).

10. The welding processing device for welding sleeves of parts according to claim 1, characterized in that, The welding unit (500) includes a fixed frame (510) fixed on a mounting plate (430), a fine-tuning slide rail (520) is inclinedly arranged on the fixed frame (510), a slide table (530) is slidably mounted on the fine-tuning slide rail (520), a fine-tuning cylinder (540) for driving the slide table (530) is mounted on the top of the fixed frame (510), and a welding torch (560) is detachably mounted on the slide table (530) via a clamping frame (550).

Images