Girth welding equipment integrated with induction preheating and stress relief mechanism

Abstract

The utility model provides girth welding equipment integrated with an induction preheating and stress relief mechanism, which relates to the technical field of girth welding and comprises a worktable, a sliding rail is arranged at the top of the worktable, and a driving tailstock and a rotary clamping mechanism are arranged on the rail in a matching manner to realize coaxial clamping of workpieces; the side face of the workbench is slidably connected with a movable supporting table, the top of the workbench is provided with a supporting column and an induction preheating device, the supporting column is adjustably connected with a welding device and a stress relief device, and the welding device, the stress relief device and the movable supporting table synchronously move along with the movable supporting table. During working, a workpiece is firstly clamped and welded after induction preheating, stress is finally relieved in real time, and the rotary clamping mechanism drives the workpiece to rotate. The device integrates multiple functions, solves the problem of process dispersion of traditional equipment, prevents cracks through accurate preheating, relieves stress in real time, improves stability, and guarantees welding precision through coaxial clamping.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to the girth seam welding technical field, concretely relates to a girth seam welding equipment of integrated induction preheating and stress relief mechanism. BACKGROUND

[0002] In the manufacturing process of hydraulic cylinder and other workpieces, girth seam welding is one of the key processes, and its quality directly affects the sealing, strength and use reliability of the product. At present, for the welding of large-diameter girth seams such as cylinder barrel and cylinder bottom, a horizontal girth seam automatic welding machine is usually used. A typical girth seam welding process includes the following steps: feeding, clamping, preheating, welding gun feeding, gas feeding protection, arc welding, arc collection, gas stopping, welding gun returning, stress relief, clamping releasing and discharging. Among them, preheating before welding and stress relief after welding are important links for affecting the forming quality of the weld, reducing residual stress and preventing cracks.

[0003] In the prior art, the preheating process usually adopts a flame heating method, and the position and flame intensity of the preheating gun are manually adjusted by an operator. This method has the problems of slow preheating speed, uneven temperature distribution, low temperature control precision, etc., which easily leads to large temperature difference in the welding area, affects the weld penetration and uniformity of the structure, and further increases the risk of defects such as pores and incomplete fusion. In addition, the preheating and stress relief processes are usually independent of the welding main machine or rely on manual operation of other auxiliary equipment to complete, which leads to poor process connection, prolonged production rhythm and low automation degree, and it is difficult to realize efficient continuous operation.

[0004] At the same time, the traditional equipment has obvious deficiencies in the switching, positioning precision and process parameter integrated control of the preheating and stress relief stations, which not only increases the operation complexity, but also affects the consistency and stability of the weld quality, especially in large-scale and multi-specification workpiece production. CONTENT OF THE UTILITY MODEL

[0005] 1. Technical problem to be solved by the utility model:

[0006] The utility model provides a girth seam welding equipment integrated with induction preheating and stress relief mechanism to solve the technical problems in the above background.

[0007] 2. Technical scheme:

[0008] To achieve the above purpose, the utility model provides a technical scheme: a girth seam welding equipment integrated with induction preheating and stress relief mechanism, comprising a workbench;

[0009] The workbench top is symmetrically provided with sliding rails, one end of the top of the sliding rails is slidably connected with a driving tail seat, the other end of the top of the sliding rails is fixedly provided with a rotary clamping mechanism, and the driving tail seat and the rotary clamping mechanism are arranged opposite to each other to realize coaxial clamping of the workpiece.

[0010] The workbench side is slidably connected with a moving support table, and one end of the top of the moving support table is fixedly connected with a support column;

[0011] The support column is vertically and adjustably connected with a welding device and a stress relief device;

[0012] The other end of the top of the moving support table is fixedly connected with an induction preheating device, and the heating area of the induction preheating device is correspondingly arranged at the part to be welded of the workpiece;

[0013] The induction preheating device, the welding device and the stress relief device are synchronously moved with the moving support table; the workbench is a horizontally arranged rigid base, the top of which is fixedly connected with two parallel sliding rails arranged symmetrically by bolts, and the extension direction of the sliding rails is consistent with the axis of the workpiece. The driving tailstock is slidably connected with the sliding rails through the bottom block, and the end thereof towards the rotary clamping mechanism is provided with a thimble; the rotary clamping mechanism is fixed at the end of the sliding rail away from the driving tailstock, and the clamping end thereof is provided with a chuck coaxial with the thimble, the chuck is matched with the thimble of the driving tailstock to realize the centering and clamping rotation of the workpiece of different lengths.

[0014] The rotary clamping mechanism adopts the prior art and can be clamped and rotated, driven by a servo motor, the rotation of the main shaft is realized by the speed reduction of a speed reducer and the rotation speed adjustment and control of a driver, and a three-jaw chuck is connected for clamping the workpiece.

[0015] The moving support table is slidably connected with the side of the workbench, so that the moving support table can drive each functional device to feed along the radial direction of the workpiece. The support column is vertically fixed at one side of the top of the moving support table, and the side wall thereof is detachably connected with the welding device and the stress relief device, which can adapt to the welding requirements of workpieces of different diameters; the working ends of the two are both towards the center of the girth joint of the workpiece.

[0016] The induction preheating device is fixed on the other side of the top of the moving support table and is used for preheating the weld joint; in operation, first, the position of the driving tailstock on the sliding rail is adjusted according to the length of the workpiece, one end of the workpiece is clamped and fixed by the three-jaw chuck of the rotary clamping mechanism, and the other end is tightly clamped by the driving tailstock, so that coaxial clamping is realized; specifically, after the equipment is started, the induction preheating device first preheats the workpiece to be welded, and after the preset temperature is reached, the moving support table drives the induction preheating device to move to another place, and at the same time, the welding device moves to the heating area for welding; after the welding is completed, the stress relief device moves to the corresponding area to perform real-time stress relief treatment on the formed weld joint, until the whole girth welding and stress relief process is completed, and in the above process, the rotary clamping mechanism drives the workpiece to rotate; the equipment integrates the functions of induction preheating, girth welding and weld joint stress relief, solves the problems of dispersed process, frequent workpiece transfer and low production efficiency of the traditional girth welding equipment, can accurately control the temperature of the weld joint to be welded, avoids the generation of welding cracks due to excessive temperature difference of the workpiece, synchronously performs welding and stress relief, can timely eliminate the residual stress of the weld joint, improves the welding strength and dimensional stability of the workpiece, and ensures the rotation accuracy of the workpiece, the coaxiality of the girth welding and the quality of the weld joint through the coaxial clamping design of the driving tailstock and the rotary clamping mechanism.

[0017] Further, the driving tailstock comprises a trapezoidal support table, the bottom of the trapezoidal support table is provided with a first concave sliding table, and the first concave sliding table is in sliding fit with the sliding rail; the top of the trapezoidal support table is detachably connected with a convex support block through bolts, the rear end of the convex support block is fixedly connected with a telescopic air cylinder, the front part of the output shaft of the telescopic air cylinder is rotatably connected with a conical top pin through a bearing, and the conical top pin is coaxially arranged with the chuck of the rotary clamping mechanism; the connection part of the first concave sliding table and the sliding rail is provided with a limiting screw, the limiting screw penetrates through the side wall of the first concave sliding table and abuts against the sliding rail, and is used for locking the position of the first concave sliding table on the sliding rail.

[0018] Further, a support mechanism is arranged between the rotary clamping mechanism and the driving tailstock; the bottom of the support mechanism is provided with a second concave sliding table, and the second concave sliding table is in sliding fit with the sliding rail; the connection part of the second concave sliding table and the sliding rail is provided with a limiting screw, the limiting screw penetrates through the side wall of the second concave sliding table and abuts against the sliding rail, and is used for locking the position of the second concave sliding table; and the top of the support mechanism is provided with a support roller.

[0019] Further, the support mechanism comprises symmetrically arranged guide columns; the top of the guide column is connected with a support plate, the two sides of the second concave sliding table are provided with guide sleeves, and the bottom of the guide column is in sliding fit with the guide sleeve; a worm screw elevator is fixedly installed in the middle of the second concave sliding table, and the top of the lifting rod of the worm screw elevator is rotatably connected with the support plate through a bearing; and the top of the support plate is symmetrically provided with support rollers.

[0020] Further, the side of the mobile support platform is matched and connected with the sliding groove of the side of the workbench through a concave slide plate, a servo rotating motor is fixedly installed on the side of the workbench, the servo rotating motor is connected with the concave slide plate through a ball screw, a nut seat is fixedly arranged on the inner side of the concave slide plate, the ball screw is threadedly matched with the nut seat, and a screw rod transmission mechanism is formed.

[0021] Further, the stress relieving device comprises an L-shaped mounting block; the vertical side of the L-shaped mounting block is adjustably connected with the support column in the vertical direction and is fixed in position through a locking bolt; one side of the horizontal top of the L-shaped mounting block is fixedly connected with a micro-motion air cylinder, and the output shaft of the micro-motion air cylinder is arranged along the radial direction of the workpiece; and the end of the output shaft of the micro-motion air cylinder is detachably connected with the stress relieving gun through an adapter block.

[0022] Further, the welding device comprises a horizontal moving device, a vertical moving device, a lifting plate, a connecting arm and a welding gun; the horizontal moving device comprises a concave support frame, the concave support frame is adjustably connected with the support column in the vertical direction and is fixed in position through a locking bolt; the side of the concave support frame is provided with a positioning track extending in the horizontal direction, and a sliding block is slidingly matched with the positioning track; one end of the concave support frame is fixedly installed with a driving motor, the output shaft of the driving motor is coaxially connected with a rotating screw rod through a shaft coupling, the rotating screw rod is arranged in parallel with the positioning track, and the rotating screw rod is threadedly matched with the sliding block; one side of the sliding block away from the positioning track is fixedly connected with an L-shaped combination plate, the other side of the L-shaped combination plate is fixedly connected with the vertical moving device; the vertical moving device has the same structure as the horizontal moving device, the positioning track of the vertical moving device extends in the vertical direction, and the sliding block of the vertical moving device is fixedly connected with the lifting plate; the lifting plate is detachably connected with the welding gun through the connecting arm, and the rotating screw rod is a self-locking precision ball screw rod, used for locking the moving position of the sliding block and realizing accurate positioning of the welding gun in the horizontal direction and the vertical direction.

[0023] Further, the induction preheating device comprises a high-frequency transformer device, a moving track and an induction heating mechanism; the high-frequency transformer device is fixedly installed on the top of the mobile support platform and is used for converting power frequency alternating current into high-frequency high-voltage alternating current; the moving track is fixedly arranged on the side of the high-frequency transformer device, and the moving track has a concave structure; the induction heating mechanism is slidingly matched with the moving track through a bottom sliding block, a limiting locking piece is arranged on the sliding block and is used for locking the radial position of the induction heating mechanism; the induction heating mechanism comprises a heating controller and an insulating connecting seat, and the front end of the insulating connecting seat is fixedly connected with an arc-shaped heating induction coil.

[0024] 3. Beneficial effects:

[0025] Compared with the prior art, the technical scheme has the beneficial effects that:

[0026] The utility model discloses reasonable in design, and the function of inductive preheating, welding, stress relief is integrated integral, solves traditional equipment process dispersion, the problem of low efficiency, preheats accurate temperature control and prevents crack, and real -time stress relief improves workpiece stability. The parts adopt adjustable design, and adapt to different specifications workpiece, coaxial clamping and accurate transmission guarantee welding precision, and long workpiece support mechanism avoids deformation.

[0027] The overall structure is compact, the automation degree is high, reduces manual intervention and maintenance cost, significantly improves welding quality and production efficiency, and is widely applicable, and has strong practicality and economy.

[0028] It should be noted that the structures not introduced by the utility model are the same as the prior art or can be realized by using the prior art, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the structure schematic diagram of the utility model;

[0030] Figure 2 It is the structure schematic diagram of the utility model Figure 1 of A place;

[0031] Figure 3 It is another angle structure schematic diagram of the utility model;

[0032] Figure 4 It is the structure schematic diagram of the welding device of the utility model;

[0033] Figure 5 It is the structure schematic diagram of the support mechanism of the utility model.

[0034] Reference signs:

[0035] 1, workbench; 2, sliding rail; 3, driving tailstock; 31, trapezoidal support table; 32, first concave sliding table; 33, convex support block; 34, telescopic cylinder; 35, conical center pin; 4, rotary clamping mechanism; 5, moving support table; 51, concave sliding plate; 52, servo rotating motor; 6, support column; 7, welding device; 71, lifting plate; 72, connecting arm; 73, welding gun; 74, concave support frame; 75, positioning track; 76, sliding block; 77, driving motor; 78, L-shaped combination plate; 8, stress relief device; 81, L-shaped mounting block; 82, micro-motion cylinder; 83, stress relief gun; 9, induction preheating device; 91, high-frequency transformer device; 92, moving track; 93, induction heating mechanism; 94, arc-shaped heating induction ring; 10, support mechanism; 101, second concave sliding table; 102, support roller; 103, guide column; 104, support plate; 105, turbine screw rod elevator. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which several embodiments of the present application are given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description. Therefore, it cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0039] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix", "have", "have in" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication inside two elements.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0040] It should be noted that the structures not introduced in the utility model can adopt the prior art known by those skilled in the art since they do not involve the design points and improvement direction of the utility model.

[0041] The specific implementation of the utility model is described in detail below in combination with specific embodiments.

[0042] Refer to the accompanying drawings Figures 1-5 A ring seam welding equipment integrating induction preheating and stress relief mechanism, comprising a workbench 1;

[0043] The workbench 1 top is symmetrically provided with sliding rails 2, one end of the sliding rails 2 top is slidably connected with a driving tailstock 3, the other end of the sliding rails 2 top is fixedly provided with a rotary clamping mechanism 4, the driving tailstock 3 and the rotary clamping mechanism 4 are oppositely arranged to realize coaxial clamping of the workpiece;

[0044] The workbench 1 side is slidably connected with a movable support table 5, one end of the movable support table 5 top is fixedly connected with a support column 6;

[0045] The support column 6 is adjustably connected with a welding device 7 and a stress relief device 8 in the vertical direction;

[0046] The other end of the movable support table 5 top is fixedly connected with an induction preheating device 9, and the heating area of the induction preheating device 9 is correspondingly arranged with the workpiece to-be-welded part;

[0047] In the embodiment, the induction preheating device 9, the welding device 7 and the stress relief device 8 all move synchronously with the movable support table 5;The workbench 1 is a horizontal rigid base, and two parallel sliding rails 2 are symmetrically arranged on the top of the workbench 1 by bolt fixing, and the extension direction of the sliding rails 2 is consistent with the workpiece axis. The driving tailstock 3 is slidably connected with the sliding rails 2 through the bottom block, and the end of the driving tailstock 3 towards the rotary clamping mechanism 4 is provided with a thimble;The rotary clamping mechanism 4 is fixed at the end of the sliding rails 2 away from the driving tailstock 3, and the clamping end of the rotary clamping mechanism 4 is provided with a chuck coaxial with the thimble, and the chuck is matched with the thimble of the driving tailstock 3 to realize the centering clamping and rotation of the workpiece of different lengths.

[0048] The rotating clamping mechanism 4 adopts the prior art and can perform clamping and rotating operations. It is driven by a servo motor, reduced by a speed reducer, and the rotating speed is adjusted and controlled by a driver to realize the rotation of the main shaft. A three-jaw chuck is connected to clamp the workpiece.

[0049] The mobile support table 5 is connected to the side of the workbench 1 through sliding, so that the mobile support table 5 can drive the various functional devices to feed along the radial direction of the workpiece. The support column 6 is vertically fixed on one side of the top of the mobile support table 5. The side wall is detachably connected to the welding device 7 and the stress relief device 8, which can adapt to the welding requirements of workpieces of different diameters. The working ends of the two are both towards the center of the girth seam of the workpiece.

[0050] The induction preheating device 9 is fixed on the other side of the top of the mobile support table 5 and is used for preheating the weld. During operation, first, the position of the driving tail seat 3 on the sliding rail 2 is adjusted according to the length of the workpiece. One end of the workpiece is clamped and fixed by the three-jaw chuck of the rotating clamping mechanism 4, and the other end is tightly clamped by the top pin of the driving tail seat 3 to realize coaxial clamping. Specifically, after starting the equipment, the induction preheating device 9 first preheats the welding area of the workpiece. After reaching the preset temperature, the mobile support table 5 drives the induction preheating device 9 to move to another place, and at the same time, the welding device 7 moves to the heating area for welding. After welding, the stress relief device 8 moves to the corresponding area to perform real-time stress relief treatment on the formed weld. Until the girth seam welding and stress relief process is completed, the rotating clamping mechanism 4 will rotate the workpiece during the above process. The equipment integrates the functions of induction preheating, girth seam welding, and weld stress relief, which solves the problems of dispersed process, frequent workpiece transfer, and low production efficiency of traditional girth seam welding equipment. The induction preheating device 9 can accurately control the temperature of the welding area to avoid cracks in the workpiece due to excessive temperature difference. The welding and stress relief are performed synchronously, which can timely eliminate the residual stress of the weld, improve the welding strength and dimensional stability of the workpiece, and ensure the coaxiality of the girth seam welding and the quality of the weld through the coaxial clamping design of the driving tail seat 3 and the rotating clamping mechanism 4 to ensure the rotating accuracy of the workpiece.

[0051] The driving tail seat 3 includes a trapezoidal support table 31, the bottom of the trapezoidal support table 31 is provided with a first concave sliding table 32, the first concave sliding table 32 is in sliding fit with the sliding rail 2; the top of the trapezoidal support table 31 is detachably connected to a convex support block 33 through a bolt, the rear end of the convex support block 33 is fixedly connected to a telescopic cylinder 34; the output shaft of the telescopic cylinder 34 is rotatably connected to a conical top pin 35 through a bearing, the conical top pin 35 is coaxially arranged with the chuck of the rotating clamping mechanism 4; a limiting screw is arranged at the connection between the first concave sliding table 32 and the sliding rail 2, the limiting screw penetrates through the side wall of the first concave sliding table 32 and abuts against the sliding rail 2, and is used for locking the position of the first concave sliding table 32 on the sliding rail 2.

[0052] In the present embodiment, according to the length of the workpiece to be processed, the limiting screw is loosened, the trapezoidal support table 31 is pushed to move along the sliding rail 2, and the distance between the driving tail seat 3 and the rotating clamping mechanism 4 is adapted to the length of the workpiece; then, one end of the workpiece is placed into the chuck of the rotating clamping mechanism 4 and clamped, the telescopic cylinder 34 is started, the output shaft of the telescopic cylinder 34 is extended forward, the tapered ejector pin 35 is driven to tightly press the center hole of the other end of the workpiece, and the positioning and coaxial clamping of the two ends of the workpiece are realized; after the clamping is completed, the limiting screw is tightened again to lock the position of the driving tail seat 3 to avoid displacement during welding; during the welding operation, the rotating clamping mechanism 4 drives the workpiece to rotate, since the tapered ejector pin 35 is tightly matched with the end of the workpiece, and the chuck is coaxially arranged with the tapered ejector pin 35, the workpiece rotates at a uniform speed and smoothly under the cooperation of the tapered ejector pin 35 and the chuck, which provides stable circumferential feeding motion for the girth welding; the locking design of the limiting screw matched with the gap between the first concave sliding table 32 and the sliding rail 2 ensures the accurate and reliable position adjustment of the driving tail seat 3, effectively avoids the coaxiality deviation of the workpiece caused by vibration during welding, improves the dimensional accuracy of the girth welding, and the detachable connection design of the convex support block 33 facilitates the maintenance or replacement of the telescopic cylinder 34, the tapered ejector pin 35 and other vulnerable parts, thereby reducing the equipment maintenance cost.

[0053] The rotating clamping mechanism 4 and the driving tail seat 3 are provided with a support mechanism 10; the bottom of the support mechanism 10 is provided with a second concave sliding table 101, which is in sliding cooperation with the sliding rail 2; a limiting screw is arranged at the connection between the second concave sliding table 101 and the sliding rail 2, the limiting screw penetrates through the side wall of the second concave sliding table 101 and abuts against the sliding rail 2, and is used for locking the position of the second concave sliding table 101; the top of the support mechanism 10 is provided with a support roller 102; in the present embodiment, according to the length and rigidity requirements of the workpiece, the installation position of the support mechanism 10 is determined, and one or more support mechanisms 10 can be arranged; the limiting screw of the second concave sliding table 101 is loosened, the support mechanism 10 is pushed to move along the sliding rail 2 to a preset support position, and the support roller 102 plays a supporting role on the middle section position of the workpiece, thereby solving the technical problem of deflection deformation of long-size and low-rigidity workpieces caused by self-weight during welding, effectively suppressing the bending of the workpiece through intermediate support, ensuring that the workpiece always maintains coaxiality during the welding process, avoiding defects such as weld offset and poor forming, and significantly improving the dimensional accuracy and weld quality of the girth welding.

[0054] The support mechanism 10 comprises symmetrically arranged guide columns 103; the top of the guide columns 103 is connected with a support plate 104, the second concave sliding table 101 is provided with guide sleeves on both sides, and the bottom of the guide columns 103 is in sliding fit with the guide sleeves; a turbine screw lifter 105 is fixedly installed in the middle of the second concave sliding table 101, and the top of the lifting rod of the turbine screw lifter 105 is rotationally connected with the support plate 104 through a bearing; the top of the support plate 104 is symmetrically provided with support rollers 102; in this embodiment, the workpiece is coaxially clamped by the rotary clamping mechanism 4 and the driving tailstock 3 during operation, and the support height is adjusted according to the diameter of the workpiece; the turbine screw lifter 105 is started by a manual rocker or an electric driving module, the lifting rod is extended to drive the support plate 104 to move upwards, the guide columns 103 are synchronously slid along the guide sleeves to play a guiding and limiting role, and the support plate 104 is prevented from tilting; when the arc-shaped grooves of the support rollers 102 are closely attached to the outer circle of the workpiece, and the workpiece is detected to have no suspended deflection, the lifting adjustment is stopped, the current height is locked by the self-locking function of the turbine screw lifter 105, and the support stability can be maintained without additional locking components; during welding operation, the workpiece is uniformly rotated under the driving of the driving tailstock 3, the support plate 104 is synchronously rotated with the workpiece through the bottom bearing, the support rollers 102 are in rolling friction fit with the outer circle of the workpiece, the intermediate supporting force is continuously provided, and the rotation accuracy of the workpiece is not affected, and the downward deflection generated by the weight of the workpiece is effectively offset.

[0055] The side of the mobile support table 5 is matched and connected with the sliding groove of the side of the workbench 1 through a concave sliding plate 51, a servo rotating motor 52 is fixedly installed on the side of the workbench 1, the servo rotating motor 52 is connected with the concave sliding plate 51 through a ball screw, a nut seat is fixedly arranged on the inner side of the concave sliding plate 51, the ball screw is in threaded fit with the nut seat, and a screw rod driving mechanism is formed; the ball screw is of a self-locking structure and is used for locking the feeding position of the mobile support table 5. In this embodiment, the servo rotating motor 52 operates according to a preset feeding speed, and then controls each device on the mobile support table 5 to move, so that the continuous operation of the "preheating-welding-stress relieving" process is realized. Specifically, the preheating operation is first performed, the ball screw drives the mobile support table 5 to move after the preheating operation is completed, until the welding device 7 moves to the welding seam to perform welding, the stress relieving device 8 on the side moves to perform the stress relieving operation after the welding is completed, and the position of the mobile support table 5 is adjusted by the ball screw to move the appropriate machining tool to the welding seam.

[0056] The stress relief device 8 comprises an L-shaped mounting block 81; the vertical side of the L-shaped mounting block 81 is connected with the support column 6 in the vertical direction in an adjustable manner, and the position is fixed by locking bolts; one side of the horizontal top of the L-shaped mounting block 81 is fixedly connected with a micro-actuator 82, and the output shaft of the micro-actuator 82 is arranged in the radial direction of the workpiece; the output shaft end of the micro-actuator 82 is detachably connected with a stress relief gun 83 through an adapter block; in this embodiment, the micro-actuator 82 is a micro-piston type cylinder, the cylinder body is fixed to one side of the horizontal top of the L-shaped mounting block 81 through a flange plate, the output shaft axis is parallel to the radial direction of the workpiece, and it is ensured that the driving force is transmitted in the normal direction of the weld. The stroke of the micro-actuator 82 can be designed according to the matching distance of the weld and the stress relief gun 83, and a pressure regulating valve is configured to accurately control the jacking force of the output shaft, so as to avoid damage to the weld due to excessive pressure or affect the stress relief effect due to insufficient pressure. The stress relief gun 83 is selected from existing technologies, for example, an ultrasonic stress relief gun 83, and a hard alloy impact head is arranged at the working end of the stress relief gun 83, the surface of the impact head is polished, the vibration frequency is adjustable, and the residual stress of the weld is eliminated through high-frequency micro-impact. The cable of the stress relief gun 83 is connected with the equipment control system through a drag chain, so as to avoid cable winding or wear during welding. After the welding device 7 completes welding of a section of weld, the stress relief gun 83 moves to the welding position, the rotating clamping mechanism 4 drives the workpiece to rotate at a constant speed, the impact head of the stress relief gun 83 is tightly attached to the surface of the weld under the jacking force of the micro-actuator 82, the newly formed weld is subjected to real-time micro-impact treatment through high-frequency vibration, the stress concentration area in the weld is destroyed, the residual stress is uniformly distributed, and cracking or deformation of the weld due to stress release after cooling is avoided.

[0057] The welding device 7 comprises a transverse moving device, a vertical moving device, a lifting plate 71, a connecting arm 72 and a welding torch 73; the transverse moving device comprises a concave support frame 74 which is connected with the support column 6 in a vertically adjustable manner and is fixed in position by locking bolts; the side surface of the concave support frame 74 is provided with a positioning track 75 extending in the horizontal direction, and a sliding block 76 is slidingly fitted on the positioning track 75; one end of the concave support frame 74 is fixedly installed with a driving motor 77, the output shaft of the driving motor 77 is coaxially connected with a rotating lead screw through a shaft coupling, the rotating lead screw is arranged in parallel with the positioning track 75, and the rotating lead screw is threadedly fitted with the sliding block 76; one side of the sliding block 76 away from the positioning track 75 is fixedly connected with an L-shaped connecting plate 78, and the other side of the L-shaped connecting plate 78 is fixedly connected with the vertical moving device; the vertical moving device has the same structure as the transverse moving device, and the positioning track 75 thereof extends in the vertical direction; the sliding block 76 of the vertical moving device is fixedly connected with the lifting plate 71; the lifting plate 71 is detachably connected with the welding torch 73 through the connecting arm 72; the rotating lead screw is a self-locking precision ball screw for locking the moving position of the sliding block 76 and realizing accurate positioning of the welding torch 73 in the horizontal and vertical directions; in this embodiment, according to the diameter of the workpiece and the height of the girth seam, the vertical position of the transverse moving device on the support column 6 is first adjusted to roughly align the welding torch 73 with the height range of the girth seam; the driving motor 77 of the transverse moving device is started to drive the rotating lead screw to rotate, convert the rotary motion into horizontal movement of the sliding block 76 along the positioning track 75, and then drive the vertical moving device and the welding torch 73 to feed in the horizontal direction, preliminarily approach the radial position of the girth seam, and then the driving motor 77 of the vertical moving device is started to drive the lifting plate 71 to ascend and descend in the vertical direction through the rotating lead screw inside the vertical moving device, finely adjust the height of the welding torch 73, accurately align the nozzle of the welding torch 73 with the center of the girth seam, ensure that the welding arc stably covers the weld, and after the positioning of the welding torch 73 is completed, the self-locking ball screw locks the position of the sliding block 76 to avoid displacement caused by vibration during welding; the driving tail seat 3 drives the workpiece to rotate at a constant speed, the support table 5 is moved to drive the welding device 7 to synchronously feed in the radial direction of the workpiece, the welding torch 73 is started and continuously outputs the arc, and the girth seam welding is completed; if the position of the welding torch 73 needs to be finely adjusted during welding, the transverse or vertical moving device can be adjusted in real time through the driving motor 77 to ensure the welding quality.

[0058] The induction preheating device 9 comprises a high-frequency transformer device 91, a moving track 92 and an induction heating mechanism 93; the high-frequency transformer device 91 is fixedly installed on the top of the moving support table 5 and is used for converting power frequency alternating current into high-frequency high-voltage alternating current; the moving track 92 is fixedly arranged on the side of the high-frequency transformer device 91, and the moving track 92 is of a concave structure; the induction heating mechanism 93 is slidably connected with the moving track 92 through a bottom sliding block, and a limiting locking piece is arranged on the sliding block and is used for locking the radial position of the induction heating mechanism 93; the induction heating mechanism 93 comprises a heating controller and an insulating connecting seat, and an arc-shaped heating induction ring 94 is fixedly connected to the front end of the insulating connecting seat; in the embodiment, the arc-shaped heating induction ring 94 is made of red copper pipe material, the arc degree of the arc-shaped heating induction ring 94 is adapted to the outer circle contour of the workpiece to-be-welded region, and the arc-shaped heating induction ring 94 is electrically connected with the high-frequency transformer device 91; when working, firstly, the limiting locking piece on the sliding block is loosened, the induction heating mechanism 93 is pushed to slide along the moving track 92, the arc-shaped heating induction ring 94 is sleeved outside the workpiece to-be-welded region, and an optimal heating interval of 3-8 mm is kept between the arc-shaped heating induction ring 94 and the workpiece surface, then the limiting locking piece is tightened to lock the position, the temperature of the workpiece to-be-welded region can be set to be monitored in real time by an external infrared temperature sensor, the temperature signal is fed back to the heating controller by the sensor; if the actual temperature is lower than the preset value, the controller automatically increases the output power to accelerate the temperature rising speed; if the actual temperature reaches the preset value, the controller maintains the current power to keep the temperature in the preset range, so that the preheating is uniform; a specific temperature control mechanism is adopted, after the preset preheating time or the temperature is stabilized, the high-frequency transformer device 91 stops working, and the preheating process is completed; then the moving support table 5 drives the induction preheating device 9 to move synchronously with the welding device 7, so as to leave a working space for the subsequent welding process, and the continuous connection of "preheating-welding" is realized.

[0059] The above-described embodiments only express certain implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application; it should be pointed out that, for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application; therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A circumferential weldment equipment integrating induction preheating and stress relief mechanisms, characterized in that: Including the workbench (1); The workbench (1) is symmetrically provided with sliding rails (2) on the top. One end of the top of the sliding rail (2) is slidably connected to a drive tailstock (3). The other end of the top of the sliding rail (2) is fixedly provided with a rotary clamping mechanism (4). The drive tailstock (3) and the rotary clamping mechanism (4) are arranged opposite to each other to achieve coaxial clamping of the workpiece. The workbench (1) is slidably connected to a movable support platform (5) on its side, and a support column (6) is fixedly connected to one end of the top of the movable support platform (5). The support column (6) is vertically adjustable and connected to a welding device (7) and a stress-relieving device (8). The other end of the top of the movable support platform (5) is fixedly connected to an induction preheating device (9), and the heating area of ​​the induction preheating device (9) is set in correspondence with the part of the workpiece to be welded.

2. The circumferential weldment equipment integrating induction preheating and stress relief mechanisms according to claim 1, characterized in that: The drive tailstock (3) includes a trapezoidal support platform (31), the bottom of which is provided with a first concave slide (32), which slides in cooperation with the sliding rail (2); the top of the trapezoidal support platform (31) is detachably connected to a convex support block (33) by bolts, and the rear end of the convex support block (33) is fixedly connected to a telescopic cylinder (34); the front part of the output shaft of the telescopic cylinder (34) is rotatably connected to a conical ejector pin (35) by a bearing, and the conical ejector pin (35) is coaxially arranged with the chuck of the rotating clamping mechanism (4); a limiting screw is provided at the connection between the first concave slide (32) and the sliding rail (2), the limiting screw passes through the side wall of the first concave slide (32) and abuts against the sliding rail (2), and is used to lock the position of the first concave slide (32) on the sliding rail (2).

3. The circumferential weldment equipment integrating induction preheating and stress relief mechanisms according to claim 1, characterized in that: A support mechanism (10) is provided between the rotating clamping mechanism (4) and the drive tailstock (3); a second concave slide (101) is provided at the bottom of the support mechanism (10), and the second concave slide (101) slides in cooperation with the sliding rail (2); a limiting screw is provided at the connection between the second concave slide (101) and the sliding rail (2), and the limiting screw passes through the side wall of the second concave slide (101) and abuts against the sliding rail (2) to lock the position of the second concave slide (101); a support roller (102) is provided at the top of the support mechanism (10).

4. The circumferential weldment equipment integrating induction preheating and stress relief mechanisms according to claim 3, characterized in that: The support mechanism (10) includes symmetrically arranged guide columns (103); the top of the guide column (103) is connected to the support plate (104), and the second concave slide (101) is provided with guide sleeves on both sides. The bottom of the guide column (103) is slidably engaged with the guide sleeves. A turbine screw jack (105) is fixedly installed in the middle of the second concave slide (101). The top of the lifting rod of the turbine screw jack (105) is rotatably connected to the support plate (104) through a bearing. Support rollers (102) are symmetrically arranged on the top of the support plate (104).

5. The circumferential weldment equipment integrating induction preheating and stress relief mechanisms according to claim 1, characterized in that: The side of the movable support platform (5) is connected to the slide groove on the side of the worktable (1) via a concave slide plate (51). A servo rotating motor (52) is fixedly installed on the side of the worktable (1). The servo rotating motor (52) is connected to the concave slide plate (51) via a ball screw. A nut seat is fixedly provided on the inner side of the concave slide plate (51). The ball screw and the nut seat are threaded together to form a screw transmission mechanism. The ball screw is a self-locking structure used to lock the feed position of the movable support platform (5).

6. The circumferential weldment equipment integrating induction preheating and stress relief mechanisms according to claim 1, characterized in that: The stress relief device (8) includes an L-shaped mounting block (81); the vertical side of the L-shaped mounting block (81) is adjustablely connected to the support column (6) in the vertical direction and fixed in position by locking bolts; a micro-motion cylinder (82) is fixedly connected to the horizontal top side of the L-shaped mounting block (81), and the output shaft of the micro-motion cylinder (82) is arranged radially along the workpiece; the end of the output shaft of the micro-motion cylinder (82) is detachably connected to the stress relief gun (83) through an adapter block.

7. The circumferential weldment equipment integrating induction preheating and stress relief mechanisms according to claim 1, characterized in that: The welding device (7) includes a horizontal moving device, a vertical moving device, a lifting plate (71), a connecting arm (72), and a welding torch (73); the horizontal moving device includes a concave support frame (74), which is vertically adjustable to the support column (6) and fixed in position by locking bolts; the side of the concave support frame (74) is provided with a positioning rail (75) extending horizontally, and a sliding block (76) is slidably fitted on the positioning rail (75); a drive motor (77) is fixedly installed at one end of the concave support frame (74), and the output shaft of the drive motor (77) is coaxially connected to the rotating lead screw through a coupling, and the rotating lead screw is parallel to the positioning rail (75). The screw is screwed into the sliding block (76); the side of the sliding block (76) away from the positioning track (75) is fixedly connected to the L-shaped connecting plate (78), and the other side of the L-shaped connecting plate (78) is fixedly connected to the vertical moving device; the vertical moving device has the same structure as the horizontal moving device, and its positioning track (75) extends in the vertical direction. The sliding block (76) of the vertical moving device is fixedly connected to the lifting plate (71); the lifting plate (71) is detachably connected to the welding gun (73) through the connecting arm (72). The screw is a self-locking precision ball screw, which is used to lock the moving position of the sliding block (76) to achieve precise positioning of the welding gun (73) in the horizontal and vertical directions.

8. The circumferential weldment equipment integrating induction preheating and stress relief mechanisms according to claim 1, characterized in that: The induction preheating device (9) includes a high-frequency transformer (91), a moving track (92), and an induction heating mechanism (93). The high-frequency transformer (91) is fixedly installed on the top of the moving support platform (5) and is used to convert the power frequency AC power into high-frequency high-voltage AC power. The moving track (92) is fixedly installed on the side of the high-frequency transformer (91) and has a concave structure. The induction heating mechanism (93) slides with the moving track (92) through a bottom slider. The slider is provided with a limit locking component to lock the radial position of the induction heating mechanism (93). The induction heating mechanism (93) includes a heating controller and an insulating connecting seat. The front end of the insulating connecting seat is fixedly connected to an arc-shaped heating induction coil (94).

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