Plasma arc welding device for producing shell of portable gas stove

Abstract

The invention discloses a plasma arc welding device for producing a shell of a portable gas stove, and relates to the technical field of welding tools for the shell of the portable gas stove, the plasma arc welding device comprises a rack, a protection box mounted at the top of the rack and an image monitor mounted on the inner top surface of the protection box, and a rotary three-turn chuck is mounted on one side of the case; a first linear motor is mounted on the other side of the top of the rack, and a butt joint mechanism is mounted on the mounting seat; a feeding and discharging mechanism is mounted at the outer end of the herringbone rotating seat; a plasma arc welding mechanical arm is mounted on a moving seat of the second linear motor; the full-process automation of the to-be-welded assembly from feeding, grabbing to transferring is achieved; through cooperative clamping of the arc-shaped hoop plate and the arc-shaped clamping plate and cooperation with an anti-deviation structure of the anti-rotation arc strip and the anti-sliding groove, the stability of a to-be-welded part in the transferring process is ensured, and the positioning deviation risk caused by manual operation is greatly reduced; and through linkage adjustment of the electric push cylinder and the lifting assembly, the grabbing height and the transferring position of the shell of the portable gas stove of different specifications can be accurately adapted.

Description

Technical Field

[0001] The invention relates to the technical field of welding tools for cassette furnace shells, in particular to a plasma arc welding device for producing cassette furnace shells. Background Art

[0002] In the production process of cassette furnace shells, plasma arc welding is the key process for connecting the cylindrical cassette furnace shell and the cassette furnace bottom shell. Its welding quality directly affects the overall performance and service life of the cassette furnace. At present, there are still many technical pain points in the welding operation of cassette furnace shells in the industry, which restricts the improvement of production efficiency and product quality. However, traditional cassette furnace shell welding mostly adopts a combination of manual assisted loading and unloading and semi-automatic welding. In the loading and unloading link, the cylindrical shell and the bottom shell that are preliminarily connected need to be manually moved to the welding station, and then the position is manually adjusted to achieve preliminary positioning. This is not only labor-intensive and inefficient, but also prone to insufficient positioning accuracy due to differences in operator experience, which buries hidden dangers for subsequent welding quality. At the same time , manual loading and unloading is difficult to adapt to the needs of large-scale continuous production, and frequent human-machine interaction also increases the risk of safety accidents; during the welding process, traditional equipment does not have precise control over the fixation and fitting of the workpiece; since the shell of the cassette furnace is mostly cylindrical, it is necessary to drive the workpiece to rotate during welding to complete the welding of the circumferential weld, and the existing fixing mechanism often has uneven clamping force or lacks a dynamic fitting mechanism, resulting in relative displacement between the shell and the bottom shell during rotation, causing the joint to deviate, resulting in defects such as uneven welds, cold welds, and even leaks, which greatly reduces the product qualification rate; in addition, if the smoke generated during the welding process cannot be discharged in time, it will not only affect the health of the operator, but may also adhere to the weld surface and affect the welding quality; At the same time, the adaptability and integration of existing welding equipment are low; most equipment can only weld cassette furnace shells of a single specification. When the product model needs to be changed, a large number of adjustments to the equipment are required, which is time-consuming and labor-intensive, and it is difficult to meet the flexible production needs of multiple varieties and small batches; and the loading and unloading, welding, and unloading processes are often independent of each other and require multiple devices or manual connection, resulting in lengthy production processes, large equipment footprint, and limited overall production efficiency; in addition, during equipment maintenance, due to the low degree of component integration, multiple related structures need to be disassembled for inspection and replacement of components, which increases maintenance costs and downtime; in response to the above problems, it is urgent to develop a plasma arc welding device that can realize automatic loading and unloading, precise positioning welding, adapt to multi-specification production, and has a high degree of integration, so as to solve the pain points of low efficiency, unstable quality, and poor adaptability in traditional production methods, and promote the upgrading and optimization of cassette furnace shell production processes. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a plasma arc welding device for producing a cassette furnace shell.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a plasma arc welding device for producing a cassette furnace shell, comprising a frame, a protective box installed on the top of the frame, an image monitor installed on the top surface of the protective box, and two observation doors installed in the opening of the front end surface of the protective box, ventilation fans are installed on the upper parts of both sides of the rear end surface of the protective box, a chassis is installed on one side of the top of the frame, a rotary three-jaw chuck is installed on one side of the chassis, a first linear motor is installed on the other side of the top of the frame, and a mounting seat is fixed on the moving seat of the first linear motor, and the mounting seat is fixed on the moving seat. A docking mechanism for pushing the bottom shell of the cassette furnace is installed; a column is vertically installed on one side of the interior of the frame, and a sliding seat is vertically slidably provided on the outer wall of one side of the column, and a lifting component is installed inside the column; an electric push cylinder is horizontally installed on the sliding seat, and the telescopic end of the electric push cylinder is rotatably connected to a herringbone rotating seat, and the outer end of the herringbone rotating seat is installed with a loading and unloading mechanism for feeding the cylindrical cassette furnace shell; a second linear motor is horizontally installed on the top rear end of the frame, and a plasma arc welding robot arm with a built-in rotation function is installed on the moving seat of the second linear motor.

[0005] Preferably, a loading slide for sliding and feeding the cylindrical cassette furnace shell is installed obliquely in the middle of the frame below the first linear motor, and the loading slide is higher at the outer end and lower at the inner end; unloading slides for discharging the welded cassette furnace shell are installed obliquely in the frames in front and behind the loading slide, and the unloading slides are higher at the inner end and lower at the outer end; a feeding circular opening is provided on the outer wall of one side of the frame to cooperate with the loading slide, and a discharging circular opening is provided to cooperate with the unloading slide; the inner ends of the loading slide and the unloading slide are both provided with semicircular plates for closing.

[0006] Preferably, the docking mechanism includes an electric telescopic rod transversely embedded inside the front and rear ends of the mounting seat, a propulsion plate installed between the telescopic ends of the two electric telescopic rods, a guide hole opened in the middle of one side of the propulsion plate and an air supply pipe transversely movably arranged inside the guide hole. A stabilization hole is opened transversely through the middle of the mounting seat; and a stabilization sleeve is fixedly installed in the stabilization hole, and the outer end of the air supply pipe passes through the stabilization sleeve and is fixedly connected to a sealed rotating joint for connection to an external air supply device; a circular air distribution plate is sealed and rotatably installed at the inner end of the air supply pipe, and a plurality of suction cups for adsorption and docking of the bottom shell of the cassette stove are equidistantly connected on the inner side surface of the air distribution plate; an adjustable buffer component is also installed on the air supply pipe between the air distribution plate and the propulsion plate to prevent rigid collision during docking.

[0007] Preferably, the adjustable buffer assembly includes an abutment ring plate and a connecting ring plate which are movably sleeved on the inner end of the air supply pipe at intervals. The abutment ring plate is arranged close to the propulsion plate, and the connecting ring plate is rotatably abutted on the air distribution plate, and a plurality of buffer springs are equidistantly fixed between the abutment ring plate and the connecting ring plate. An external threaded section is provided on the air supply pipe outside the propulsion plate, and a limit knob is screwed on the external threaded section of the air supply pipe, the inner side of which is rotatably abutted against the propulsion plate; a plurality of anti-slip balls are equidistantly embedded in the circumference of the outer side surface of the abutment ring plate and the circumference of the inner side surface of the limit knob.

[0008] Preferably, the loading and unloading mechanism includes mounting grooves provided in each end of the herringbone rotating seat, a main electric push rod fixed in the mounting groove, an arc-shaped seat installed at the telescopic end of the main electric push rod, a storage channel provided inside the front and rear ends of the arc-shaped seat, and an arc-shaped hoop plate slidably installed inside the sliding channel, and the outer ends of the arc-shaped hoop plate extend from the ends of the arc-shaped seat, and drive boxes are installed on the outer sides of the front and rear ends of the arc-shaped seat, and a locking drive assembly for extending the arc-shaped hoop plate is installed in the drive box; a drive groove is provided in the middle of the inner side surface of the herringbone rotating seat, and a rotating assembly is installed in the drive groove.

[0009] Preferably, cross bars are fixed to the lower parts of both side surfaces of the arc-shaped seat, and auxiliary electric push rods are fixedly installed on the outer ends of the cross bars, and the telescopic ends of the auxiliary electric push rods are installed with arc-shaped splints in the same direction as the slots of the arc-shaped seat, and anti-rotation arc strips are installed on the inner arc surfaces of the arc-shaped seat and the arc-shaped splint, and anti-slip grooves are horizontally opened on the inner arc surface of the arc-shaped hoop plate.

[0010] Preferably, the locking drive assembly includes an arcuate groove provided on the outer arc surface of the arc hoop plate, an arcuate rack installed in the arcuate groove, a rotating rod arranged laterally inside the driving box, a first gear fixedly sleeved on the middle part of the rotating rod, and a worm gear fixedly sleeved on one end of the rotating rod. The outer walls of the front and rear ends of the arc seat are provided with transmission openings for the teeth of the first gear to pass through, and the first gear is engaged with the arcuate rack through the transmission opening for transmission, so as to adjust the extension and contraction of the arc hoop plate in the arc channel; a worm engaged with the worm gear is provided for rotation inside one side of the driving box, and a micro motor coaxially fixed to one end of the worm is installed on the outside of the driving box.

[0011] Preferably, the inner ends of both sides of the drive box are fixed with guide slides for preventing the arc hoop plate from being displaced during the storage process, the inner side surface of the guide slide is raised with a guide arc bar, and both sides of the arc hoop plate are equipped with guide arc grooves for preventing displacement in conjunction with the guide arc bar.

[0012] Preferably, the rotating assembly includes a self-locking motor fixed laterally on the inner wall of the driving groove and a second gear fixedly mounted on the driving shaft of the self-locking motor. The telescopic end of the electric push cylinder is movable through the interior of the driving groove and is fixedly connected to a fixed gear ring that meshes with the second gear. The self-locking motor drives the second gear to rotate, causing the second gear to perform reciprocating circular motion around the fixed gear ring, thereby causing the herringbone rotating seat to rotate back and forth with the telescopic end of the electric push cylinder as the center of the circle to perform alternating loading and unloading operations.

[0013] Preferably, the lifting assembly includes a vertically rotating screw arranged inside the column, a lifting seat sleeved on the screw and a servo motor installed at the bottom end of the screw, the servo motor is fixed in the lower part of the column, a guide strip opening is vertically opened on the side of the column, and a connecting block is fixed to one side of the lifting seat, and the outer end of the connecting block is fixedly connected to the sliding seat.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention demonstrates significant creative advantages in the collaborative operation of automated loading and unloading and welding. The loading and unloading mechanism, consisting of a herringbone rotating seat, a main electric push rod, an arc-shaped hoop plate, and a locking drive assembly, is combined with a rotating assembly consisting of a self-locking motor, a second gear, and a fixed gear ring to achieve full automation of the entire process from feeding, grabbing, to transferring of the assembly to be welded. Compared with the traditional manual loading and unloading method, this design ensures the stability of the welded parts during transportation through the coordinated clamping of the arc-shaped hoop plate and the arc-shaped clamping plate, in conjunction with the anti-rotation arc bar and the anti-slide groove anti-deviation structure, thereby greatly reducing the risk of positioning deviation caused by manual operation. Through the linkage adjustment of the electric push cylinder and the lifting assembly, the grabbing height and transfer position of cassette furnace shells of different specifications can be accurately adapted, thereby achieving the adaptability of the production range of multiple models of products, significantly improving production efficiency, and reducing labor costs. 2. In terms of welding precision and quality control, the present invention has achieved a breakthrough improvement through multiple structural innovations; the sealed rotating connection design of the air supply pipe and the air distribution plate in the docking mechanism, combined with the adsorption effect of the suction cup, ensures that the bottom shell of the cassette furnace and the shell are tightly fitted during welding, avoiding the problem of joint deviation caused by loose workpieces in traditional welding; the combination of the abutting ring plate, buffer spring and sliding ball of the adjustable buffer assembly can not only alleviate the rigid impact during the advancement process through the buffer spring, but also flexibly adjust the buffer stroke through the limit knob to adapt to the welding requirements of shells of different materials; in addition, the coordinated work of the plasma arc welding robot arm and the rotary three-jaw chuck, combined with the real-time monitoring of the image monitor and the smoke exhaust function of the ventilation fan, not only ensures the uniformity of the circumferential weld, but also improves the welding environment, reduces welding defects, and significantly improves the product qualification rate; 3. The innovative design of the present invention in terms of equipment integration and operational convenience further highlights its creative value; the closed structure of the protective box and the cooperation with the observation door not only provide a safe protection space for welding operations, but also facilitate the operator to observe the welding status in real time; the combination of the second linear motor and the plasma arc welding robot arm can quickly adjust the welding starting position to adapt to different weld trajectory requirements; the modular design of the loading and unloading mechanism and the welding mechanism makes equipment maintenance and component replacement more convenient, and the self-locking function of the self-locking motor and the alternating operation mode of the herringbone rotating seat realize the parallel processing of loading and unloading and welding processes, greatly shortening the production cycle of a single product; in addition, the inclined design of the loading and unloading chute and the closing function of the semicircular plate realize the automatic flow of materials, reduce the intermediate transfer links, and further improve the continuity and automation level of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention from a first viewing angle; Figure 2 A second perspective diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the protective box of the present invention with the top cover removed; Figure 4 This is a schematic diagram of the protective box of the present invention in a dismantled state from a first perspective; Figure 5 This is a schematic diagram of the protective box of the present invention in a dismantled state from a second viewing angle; Figure 6 This is a schematic diagram of the lower inner structure of the rack according to the present invention from a first perspective; Figure 7 This is a schematic diagram of the lower inner structure of the rack according to the present invention from a second viewing angle; Figure 8 This is a schematic diagram of the structure after the mounting base and the electric telescopic rod of the present invention are removed; Figure 9 It is a schematic three-dimensional diagram of the local structure of the present invention; Figure 10 This is a schematic diagram of the positional relationship between the herringbone rotating seat and the loading and unloading chutes of the present invention; Figure 11 Schematic diagram of the positional relationship between the herringbone rotating seat, the gas distributor, and the plasma arc welding robot arm of the present invention; Figure 12 Schematic diagram of the positional relationship between the docking structure, loading and unloading structure, and loading slideway of the present invention; Figure 13This is a schematic diagram of the local structure of the docking mechanism of the present invention from a first perspective; Figure 14 A schematic diagram of the local structure of the docking mechanism of the present invention from a second viewing angle; Figure 15 It is a schematic diagram of the structure of the lifting assembly and the herringbone rotating seat of the present invention; Figure 16 This is a schematic diagram of the structure of the lifting assembly, electric push cylinder and herringbone rotating seat of the present invention; Figure 17 It is a detailed structural diagram of the lifting assembly and loading and unloading mechanism of the present invention; Figure 18 It is a schematic diagram of the self-locking drive assembly and the arc hoop plate structure of the present invention.

[0016] Serial numbers in the figure: 1, frame; 2, protective box; 3, observation door; 4, ventilation fan; 5, chassis; 6, rotary three-jaw chuck; 7, first linear motor; 8, mounting seat; 9, push plate; 10, electric telescopic rod; 11, second linear motor; 12, plasma arc welding robot arm; 13, column; 14, lead screw; 15, lifting seat; 16, servo motor; 17, sliding seat; 18, electric push cylinder; 19, herringbone rotating seat; 20, main electric push rod; 21, arc seat; 22, arc hoop plate; 23, drive Box; 24. Arc-shaped rack; 25. Rotating rod; 26. First gear; 27. Worm; 28. Worm wheel; 29. ​​Micro motor; 30. Anti-rotation arc bar; 31. Auxiliary electric push rod; 32. Arc-shaped splint; 33. Fixed gear ring; 34. Self-locking motor; 35. Second gear; 36. Stabilizing sleeve; 37. Air supply pipe; 38. Air distributor; 39. Suction cup; 40. Abutting ring plate; 41. Connecting ring plate; 42. Buffer spring; 43. Limit knob; 44. Sliding ball; 45. Loading slide; 46. Unloading slide. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Example 1: See Figures 1 to 18A plasma arc welding device for the production of cassette furnace shells includes a frame 1, a protective box 2 installed on the top of the frame 1, an image monitor installed on the top surface of the protective box 2, and two observation doors 3 installed in the opening of the front end surface of the protective box 2. Ventilation fans 4 are installed on the upper parts of both sides of the rear end surface of the protective box 2. The protective box 2 can effectively isolate the arc, smoke and splashes generated during the welding process to protect the safety of the operator, while providing a relatively closed environment for welding and reducing external interference; the observation door 3 is convenient for the operator to observe the welding situation in real time and can be opened quickly when necessary. The image monitor can monitor the welding area in real time, which is convenient for accurately controlling the welding process and timely discovering welding defects. The ventilation fan 4 can quickly discharge the smoke and harmful gases in the protective box 2, maintain the air circulation in the box, and improve the working environment. A chassis 5 is installed on one side of the top of the frame 1, and a rotary three-jaw chuck 6 is installed on one side of the chassis 5. A first linear motor 7 is installed on the other side of the top of the frame 1, and a mounting seat 8 is fixed on the moving seat of the first linear motor 7. A docking mechanism for advancing the bottom shell of the cassette furnace is installed on the mounting seat 8. One side of the inside of the frame 1 A column 13 is installed vertically, and a sliding seat 17 is provided on the outer wall of one side of the column 13 for vertical sliding. A lifting component is installed inside the column 13; an electric push cylinder 18 is installed horizontally on the sliding seat 17, and the telescopic end of the electric push cylinder 18 is rotatably connected to the herringbone rotating seat 19, and the outer end of the herringbone rotating seat 19 is installed with a loading and unloading mechanism for feeding the cylindrical cassette furnace shell; the electric push cylinder 18 can push the herringbone rotating seat 19 to move horizontally, and cooperate with the loading and unloading mechanism to complete the horizontal position adjustment of taking and putting materials; the rotation function of the herringbone rotating seat 19 enables the loading and unloading mechanism to realize alternating loading and unloading Unloading, improving the loading and unloading efficiency; the loading and unloading mechanism can automatically complete the feeding operation of the cylindrical cassette furnace shell, reduce manual intervention, and improve the degree of automation; a second linear motor 11 is horizontally installed at the top rear end of the frame 1, and a plasma arc welding robot 12 with a built-in rotation function is installed on the moving seat of the second linear motor 11. The second linear motor 11 can drive the plasma arc welding robot 12 to move horizontally accurately, and cooperate with the rotation function of the robot itself to realize welding operations at different positions of the cassette furnace shell, expand the welding range, and ensure the flexibility and accuracy of welding.

[0019] In the present invention, a loading chute 45 for sliding and feeding the cylindrical cassette furnace shell is installed obliquely in the middle of the frame 1 below the first linear motor 7, and the loading chute 45 is higher at the outer end and lower at the inner end; gravity is used to realize automatic sliding and feeding of the cylindrical cassette furnace shell, without the need for additional power, saving energy, and can continuously feed, thereby improving loading efficiency; unloading chutes 46 for discharging the welded cassette furnace shell are installed obliquely in the frame 1 in front and behind the loading chute 45, and the unloading chute 46 is higher at the inner end and lower at the outer end; the welded cassette furnace shell automatically slides out under the action of gravity, realizing automatic discharging and improving the continuity of the overall production; a feeding circular opening is provided on the outer wall of one side of the frame 1 to cooperate with the loading chute 45, and a discharging circular opening is provided to cooperate with the unloading chute 46; the inner ends of the loading chute 45 and the unloading chute 46 are both provided with semicircular plates for closure.

[0020] In the present invention, the lifting assembly includes a vertically rotating screw 14 arranged inside the column 13, a lifting seat 15 sleeved on the screw 14 and a servo motor 16 installed at the bottom end of the screw 14. The servo motor 16 is fixed in the lower part of the column 13. A guide strip opening is vertically opened on the side of the column 13, and a connecting block is fixedly connected to one side of the lifting seat 15, and the outer end of the connecting block is fixedly connected to the sliding seat 17.

[0021] Example 2: The technical solution is basically the same as that of Example 1, except that Figures 12 to 14 As shown, the docking mechanism includes an electric telescopic rod 10 transversely embedded in the front and rear ends of the mounting seat 8, a push plate 9 installed between the telescopic ends of the two electric telescopic rods 10, a guide hole provided in the middle of one side of the push plate 9 and an air supply pipe 37 transversely movably provided inside the guide hole. A stabilizing hole is provided transversely through the middle of the mounting seat 8; a stabilizing sleeve 36 is fixedly installed in the stabilizing hole, and the outer end of the air supply pipe 37 passes through the stabilizing sleeve 36 and is fixedly connected to a sealed rotating joint for connecting to an external air supply device; a circular air distribution plate 38 is sealed and rotatably installed at the inner end of the air supply pipe 37, and a plurality of suction cups 39 for adsorption and docking of the bottom shell of the cassette stove are equidistantly connected on the inner side surface of the air distribution plate 38; the air distribution plate 38 and An adjustable buffer component is also installed on the air supply pipe 37 between the push plates 9 to prevent rigid collision during docking; the electric telescopic rod 10 of the docking mechanism can push the push plate 9 to move horizontally accurately, providing stable power for the advancement of the bottom shell of the cassette furnace; the guide hole of the push plate 9 and the air supply pipe 37 cooperate to guide the air supply pipe 37 and ensure the stability of the lateral movement of the air supply pipe 37; the stabilizing sleeve 36 and the stabilizing hole cooperate to further improve the stability of the lateral movement of the air supply pipe 37 and avoid the shaking of the air supply pipe 37 affecting the adsorption docking effect; the air supply pipe 37 provides an air source for the suction cup 39, and the suction cup 39 can adsorb the bottom shell of the cassette furnace through negative pressure to achieve stable docking of the bottom shell, and the adsorption method will not cause rigid damage to the bottom shell.

[0022] In the present invention, the adjustable buffer assembly includes an abutment ring plate 40 and a connecting ring plate 41 that are movably sleeved on the inner end of the air supply pipe 37 at intervals. The abutment ring plate 40 is arranged close to the propulsion plate 9, and the connecting ring plate 41 is rotatably abutted on the air distribution plate 38, and a plurality of buffer springs 42 are equidistantly fixed between the abutment ring plate 40 and the connecting ring plate 41. An external threaded section is provided on the air supply pipe 37 outside the propulsion plate 9, and a threaded section on the external threaded section of the air supply pipe 37 is screwed and connected with an inner side that is rotatably abutted against the propulsion plate 9. Limit knob 43; a plurality of anti-slip balls 44 are equidistantly embedded in the circumference of the outer side surface of the abutting ring plate 40 and the circumference of the inner side surface of the limit knob 43; the adjustable buffer component can play a buffering role during the docking process, prevent the bottom shell and the shell from rigidly colliding, and protect the surface quality of the workpiece. At the same time, the limit knob 43 can adjust the buffering force to adapt to workpieces of different specifications. The anti-slip balls 44 reduce the friction between the abutting ring plate 40 and the limit knob 43, ensuring the smoothness of the buffering adjustment.

[0023] Example 3: The technical solution is basically the same as that of Example 1, except that Figures 15 to 18 As shown, the loading and unloading mechanism includes mounting grooves provided in each end of the herringbone rotating seat 19, a main electric push rod 20 fixed in the mounting groove, an arc seat 21 installed at the telescopic end of the main electric push rod 20, a receiving channel provided in the front and rear end of the arc seat 21, and an arc hoop plate 22 slidably installed in the sliding channel, and the outer end of the arc hoop plate 22 extends from the end of the arc seat 21, and a drive box 23 is installed on the outer side of the front and rear end of the arc seat 21, and a locking drive assembly for extending the arc hoop plate 22 is installed in the drive box 23; a drive groove is provided in the middle of the inner side surface of the herringbone rotating seat 19, and a rotating assembly is installed in the drive groove; the lower part of both side surfaces of the arc seat 21 is fixed with a cross bar, and the outer end of the cross bar is fixedly installed with an auxiliary electric push rod 31, and the telescopic end of the auxiliary electric push rod 31 is installed with a cross bar connected to the arc The arc splint 32 has the same notch direction as the arc seat 21, and the inner arc surfaces of the arc seat 21 and the arc splint 32 are both equipped with anti-rotation arc strips 30, and the inner arc surface of the arc hoop plate 22 is horizontally provided with anti-slip grooves; the auxiliary electric push rod 31 pushes the arc splint 32 to retract and retract, and cooperates with the arc seat 21 to further clamp the cylindrical cassette furnace shell to prevent the shell from slipping during loading and unloading; the anti-rotation arc strip 30 and the anti-slip groove can increase the friction between the shell and the arc seat 21, the arc splint 32, and the arc hoop plate 22 to prevent the shell from rotating during loading and unloading, thereby ensuring the stability of loading and unloading; the main electric push rod 20 can push the arc seat 21 to retract and retract, adjust the distance between the arc seat 21 and the workpiece, and adapt to different material picking position requirements; the arc seat 21 and the arc hoop plate 22 cooperate to wrap the cylindrical cassette furnace shell to achieve preliminary positioning of the shell; In the present invention, the locking drive assembly includes an arc groove provided on the outer arc surface of the arc hoop plate 22, an arc rack 24 installed in the arc groove, a rotating rod 25 arranged inside the drive box 23 for transverse rotation, a first gear 26 fixedly sleeved on the middle part of the rotating rod 25 and a worm gear 28 fixedly sleeved on one end of the rotating rod 25. The outer walls of the front and rear ends of the arc seat 21 are provided with transmission openings for the teeth of the first gear 26 to pass through, and the first gear 26 is meshed with the arc rack 24 through the transmission opening for transmission, so as to adjust the expansion and contraction of the arc hoop plate 22 in the arc channel; a worm 27 meshing with the worm gear 28 is provided on one side of the drive box 23 for rotation, and a micro motor 29 coaxially fixed to one end of the worm 27 is installed on the outside of the drive box 23; the inner ends of both sides of the drive box 23 are fixed with a worm gear for preventing the arc During the storage process, the hoop plate 22 has a guide slide that is displaced. The inner side surface of the guide slide is raised with a guide arc bar, and both sides of the arc hoop plate 22 are equipped with guide arc grooves for preventing displacement in conjunction with the guide arc bar; in the locking drive assembly, the micro motor 29 drives the worm 27 to rotate, and the worm 27 drives the worm wheel 28 to rotate, and then drives the first gear 26 to rotate through the rotating rod 25. The first gear 26 is engaged with the arc rack 24 for transmission to realize the telescopic adjustment of the arc hoop plate 22, and the worm wheel 28 and the worm 27 have a self-locking function, which can ensure the stability of the position of the arc hoop plate 22 after extension and extension to prevent loosening; the guide slide and the guide arc bar cooperate with the guide arc groove of the arc hoop plate 22 to prevent the arc hoop plate 22 from being displaced during the storage process, thereby ensuring the accuracy of the extension and retraction of the arc hoop plate 22.

[0024] In the present invention, the rotating assembly includes a self-locking motor 34 fixed laterally on the inner wall of the driving groove and a second gear 35 fixedly mounted on the driving shaft of the self-locking motor 34. The telescopic end of the electric push cylinder 18 can be moved through the interior of the driving groove and is fixedly connected to a fixed gear ring 33 that meshes with the second gear 35. The self-locking motor 34 drives the second gear 35 to rotate, so that the second gear 35 performs a reciprocating circular motion around the fixed gear ring 33, thereby causing the herringbone rotating seat 19 to rotate back and forth with the telescopic end of the electric push cylinder 18 as the center of the circle to perform alternating loading and unloading operations; in the rotating assembly, the self-locking motor 34 drives the second gear 35 to rotate, and the second gear 35 performs a circular motion around the fixed gear ring 33, so that the herringbone rotating seat 19 rotates with the telescopic end of the electric push cylinder 18 as the center of the circle, realizing alternating loading and unloading with back and forth rotation, thereby improving loading and unloading efficiency, and the self-locking motor 34 has a self-locking function to ensure that the position after rotation is stable.

[0025] Working Principle: In this embodiment, the present invention also proposes a method for using a plasma arc welding device for producing a cassette furnace shell, comprising the following steps: Step 1: First, carefully check whether all the components of the device are installed in place, and then accurately connect all the electrical equipment in the device (such as the servo motor 16 at the bottom of the column 13, the micro motor 29 outside the drive box 23, the self-locking motor 34 in the drive slot, the plasma arc welding robot 12 with self-rotating function, etc.) with the external control system to ensure smooth signal transmission; at the same time, connect it tightly with the external gas supply equipment through the sealed rotary joint at the outer end of the gas supply pipe 37, open the gas supply valve to test the gas, check whether there is any leakage in the gas supply pipe 37 and the gas distribution plate 38, and ensure stable gas transmission; then, hold the handle of the observation door 3 on the front face of the protective box 2 with both hands, Open the two observation doors 3 to both sides to reveal the internal operating space; put the cylindrical cassette furnace shell and cassette furnace bottom shell assembly that have been preliminarily docked into place, and carefully place them on the loading chute 45 through the outer wall of one side of the frame 1 that cooperates with the feeding circular opening opened by the loading chute 45; when placing them, it is necessary to strictly ensure that the opening of the cassette furnace shell to be welded faces the inner end and the cassette furnace bottom shell faces outward, and use the inclined design of the loading chute 45 with the outer end higher and the inner end lower to make the assembly slide smoothly along the chute under its own gravity until it slides to the initial position below the herringbone rotating seat 19. At this time, the semicircular plate at the inner end of the loading chute 45 just closes the end of the chute, effectively preventing the assembly from continuing to slide; Step 2: Start the electric push cylinder 18 installed on the sliding seat 17, and its telescopic end slowly extends to push the herringbone rotating seat 19 to move horizontally in the horizontal direction, so that the end of the herringbone rotating seat 19 is accurately aligned with the tail end of the assembly to be welded on the loading slide 45; then, start the main electric push rod 20 installed in the mounting groove, and its telescopic end extends downward to push the arc seat 21 to descend vertically. During the descent, observe through the observation door 3 until the notch of the arc seat 21 is perfectly aligned with the outer contour of the assembly to be welded; then, start the micro motor 29 outside the drive box 23, and the output shaft of the micro motor 29 drives the worm 27 to rotate slowly. The worm 27 and the worm wheel 28 engage with each other for transmission, so that the rotating rod 25 rotates synchronously with the worm wheel 28, and the rotating rod 25 rotates in a synchronous manner. The first gear 26 of the upper part also rotates accordingly, and the first gear 26 accurately meshes with the arc rack 24 in the arc groove on the outer arc surface of the arc hoop plate 22 through the transmission port, thereby driving the arc hoop plate 22 to smoothly extend from the storage channel of the arc seat 21, gradually picking up the assembly to be welded; at this time, the auxiliary electric push rods 31 at the outer ends of the cross bars at the lower parts of the two side surfaces of the arc seat 21 are immediately started, and their telescopic ends push the arc clamping plates 32 inward, and the arc clamping plates 32 cooperate with the arc seat 21 to firmly clamp the assembly to be welded, and the anti-rotation arc strips 30 on the inner arc surfaces of the arc seat 21 and the arc clamping plates 32 are just embedded in the grooves on the outer wall of the assembly, and the anti-slip grooves on the inner arc surface of the arc hoop plate 22 are in close contact with the surface of the assembly, which greatly increases the friction force and effectively prevents rotation or slipping during the grabbing process; Step three, start the self-locking motor 34 in the driving groove on the inner side of the herringbone rotating seat 19, the driving shaft of the self-locking motor 34 drives the second gear 35 to start rotating, and the second gear 35 is engaged with the fixed gear ring 33 fixed to the telescopic end of the electric push cylinder 18. Under the meshing action, the second gear 35 performs a smooth circular motion around the fixed gear ring 33, thereby driving the herringbone rotating seat 19 to slowly rotate with the telescopic end of the electric push cylinder 18 as the center, and smoothly transporting the clamped assembly to be welded to one side of the rotary three-jaw chuck 6; at the same time, start the servo motor 16 at the lower part of the column 13, and the output end of the servo motor 16 drives the wire The lever 14 rotates clockwise, and the lifting seat 15 on the screw 14 moves upward along the screw 14 under the action of the thread. The lifting seat 15 drives the sliding seat 17 to rise vertically along the guide strip opening on the side of the column 13 through the connecting block. During the rising process, the height of the assembly to be welded is observed through the observation door 3 until the height of the assembly to be welded is accurately aligned with the clamping center of the rotary three-jaw chuck 6; then, the electric push cylinder 18 is started again, and its telescopic end continues to extend, pushing the herringbone rotating seat 19 to slowly move toward the rotary three-jaw chuck 6, accurately sending the open end of the assembly to be welded between the jaws of the three-jaw chuck; The fourth step is to start the first linear motor 7 installed on the other side of the top of the frame 1, and its moving seat drives the mounting seat 8 to move smoothly toward the rotary three-jaw chuck 6, so that the docking mechanism gradually approaches the bottom shell of the assembly to be welded; then, the electric telescopic rods 10 inside the front and rear ends of the mounting seat 8 are started at the same time, and their telescopic ends extend forward to push the push plate 9 to move horizontally, and the push plate 9 drives the air supply pipe 37 to slide smoothly along the stabilizing hole in the stabilizing sleeve 36, and the air distribution plate 38 at the inner end of the air supply pipe 37 moves forward accordingly. During the movement, the air supply pipe 37 always remains in a horizontal state until the multiple suction cups 39 on the inner side of the air distribution plate 38 are evenly abutted against the outer surface of the bottom shell of the cassette furnace; at this time, the valve of the external air supply equipment is opened, and the air supply pipe 37 is connected to the bottom shell of the cassette furnace through the air supply pipe 37. The air distribution plate 38 supplies air, and negative pressure is generated inside the suction cup 39, which firmly adsorbs the bottom shell; at the same time, the adjustable buffer component starts to work: if there is a tendency of rigid collision between the propulsion plate 9 and the air distribution plate 38, the buffer spring 42 between the abutment ring plate 40 and the connecting ring plate 41 will be compressed in time, playing a good buffering role. By turning the limit knob 43 on the external threaded section of the air supply pipe 37, the buffer stroke can be adjusted according to actual needs. The sliding ball 44 between the abutment ring plate 40 and the limit knob 43 reduces the friction resistance during relative rotation, making the adjustment process smoother; then, the rotary three-jaw chuck 6 is started, and its three jaws are synchronously retracted inward to firmly clamp the outer wall of the cassette furnace shell, completing the precise positioning and fixation of the workpiece to be welded; Step five, the loading and unloading mechanism begins to reset: start the locking drive assembly to reverse, the micro motor 29 drives the worm 27 to rotate in the opposite direction, and through a series of transmissions, the arc hoop plate 22 is slowly retracted into the arc seat 21, and the auxiliary electric push rod 31 drives the arc clamping plate 32 to move outward, loosening the clamping of the assembly to be welded, and the servo motor 16 in the lifting assembly reverses, driving the screw 14 to rotate counterclockwise, so that the lifting seat 15 drives the sliding seat 17 to descend, and the herringbone rotating seat 19 rotates to the initial position under the drive of the self-locking motor 34, ready for the next grab; close the two observation doors 3 of the protective box 2, so that the welding work can be carried out in a closed space; start the second linear motor 11 installed at the top rear end of the frame 1, and its moving seat drives the plasma arc welding robot 12 to move in the lateral direction, adjusting Adjust to the welding starting position, and start the rotary three-jaw chuck 6 at the same time, driving the cassette furnace shell to rotate at a suitable uniform speed; the plasma arc welding robot arm 12 is started to generate a high-temperature plasma arc, and continuous circumferential welding is performed on the joint between the shell and the bottom shell; since the gas distribution plate 38 and the gas supply pipe 37 are sealed and rotated, the gas distribution plate 38 will rotate synchronously with the bottom shell, and the suction cup 39 always maintains an adsorption and tight state against the bottom shell, effectively avoiding the deviation of the joint during welding; during the welding process, the ventilation fans 4 on the upper sides of the rear end face of the protective box 2 continue to work at high speed to discharge the smoke and dust generated by welding out of the protective box 2 in time; the image monitor on the top surface of the protective box 2 monitors the welding status in real time and transmits the picture to the external display screen. The operator can observe the internal welding situation at any time through the observation door 3; Step 6. After welding is completed, the image monitor feeds back the signal of qualified welding to the control system, and the plasma arc welding robot 12 stops working immediately, and its robot arm joint rotates and resets to the initial position. The clamping jaws of the rotary three-jaw chuck 6 are opened outward synchronously to release the clamping of the finished product; the lifting assembly is started again, and the servo motor 16 drives the screw 14 to rotate, so that the sliding seat 17 rises, and drives the herringbone rotating seat 19 to rise to a suitable height. The self-locking motor 34 in the rotating assembly drives the second gear 35 to rotate, so that the herringbone rotating seat 19 rotates to the place where the welding is completed, and the arc hoop plate 22 extends again, and cooperates with the arc clamping plate 32 to clamp the finished product firmly; then, the external supply is closed. The valve of the air equipment is opened, the air supply pipe 37 stops supplying air, the negative pressure inside the suction cup 39 disappears, the bottom shell is loosened, and the herringbone rotating seat 19 is driven by the rotating assembly to rotate to the top of the unloading chute 46, the arc hoop plate 22 is retracted, and the arc clamping plate 32 is loosened, and the finished product falls into the unloading chute 46 under the action of gravity; using the inclined design of the unloading chute 46 with a higher inner end and a lower outer end, the finished product slides smoothly along the unloading chute 46 and is discharged through the discharging circular port of the frame 1. The semicircular plate at the inner end of the unloading chute 46 plays a blocking role in the sliding process of the finished product to prevent the finished product from falling prematurely; finally, the loading and unloading mechanism is completely reset to the initial position under the action of each driving component, waiting for the next batch of parts to be welded, and the entire welding cycle is successfully completed.

[0026] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A plasma arc welding device for producing a cassette furnace shell, comprising a frame (1), a protective box (2) mounted on the top of the frame (1), an image monitor mounted on the top surface of the protective box (2), and two observation doors (3) mounted in an opening on the front end of the protective box (2), characterized in that: Ventilation fans (4) are installed on both upper parts of the rear end surface of the protection box (2); a chassis (5) is installed on one side of the top of the frame (1); a rotary three-jaw chuck (6) is installed on one side of the chassis (5); a first linear motor (7) is installed on the other side of the top of the frame (1); a mounting seat (8) is fixed on the moving seat of the first linear motor (7); a docking mechanism for advancing the bottom shell of the cassette furnace is installed on the mounting seat (8); a column (13) is vertically installed on one side of the interior of the frame (1); a vertical column (13) is installed on the outer wall of one side of the column (13); A sliding seat (17) is provided for sliding, and a lifting assembly is installed inside the column (13); an electric push cylinder (18) is installed horizontally on the sliding seat (17), and the telescopic end of the electric push cylinder (18) is rotatably connected to a herringbone rotating seat (19), and the outer end of the herringbone rotating seat (19) is installed with a loading and unloading mechanism for feeding the cylindrical cassette furnace shell; a second linear motor (11) is installed horizontally at the top rear end of the frame (1), and a plasma arc welding robot arm (12) with a self-rotating function is installed on the moving seat of the second linear motor (11).

2. The plasma arc welding device for producing a cassette furnace shell according to claim 1, characterized in that: A loading slide (45) for sliding and feeding the cylindrical cassette furnace shell is installed obliquely in the middle of the frame (1) below the first linear motor (7), and the loading slide (45) is higher at the outer end and lower at the inner end; unloading slides (46) for discharging the welded cassette furnace shell are installed obliquely in the frames (1) in front and behind the loading slide (45), and the unloading slide (46) is higher at the inner end and lower at the outer end; a feeding circular opening is provided on the outer wall of one side of the frame (1) to match the loading slide (45) and a discharging circular opening is provided to match the unloading slide (46); the inner ends of the loading slide (45) and the unloading slide (46) are both provided with semicircular plates for closing.

3. The plasma arc welding device for producing a cassette furnace shell according to claim 1, characterized in that: The docking mechanism comprises an electric telescopic rod (10) transversely embedded in the front and rear ends of the mounting seat (8), a push plate (9) installed between the telescopic ends of the two electric telescopic rods (10), a guide hole provided in the middle of one side of the push plate (9), and an air supply pipe (37) transversely movably provided in the guide hole, wherein the middle part of the mounting seat (8) is provided with a stabilizing hole transversely running through; a stabilizing sleeve (36) is fixedly installed in the stabilizing hole, and the outer end of the air supply pipe (37) passes through the stabilizing sleeve (36) and is fixedly connected to a sealing rotating joint for connecting to an external air supply device; a circular air distribution plate (38) is sealed and rotatably installed at the inner end of the air supply pipe (37), and a plurality of suction cups (39) for adsorbing and docking the bottom shell of the cassette furnace are equidistantly connected on the inner side surface of the air distribution plate (38); an adjustable buffer component for preventing rigid collision during docking is also installed on the air supply pipe (37) between the air distribution plate (38) and the push plate (9).

4. The plasma arc welding device for producing a cassette furnace shell according to claim 3, characterized in that: The adjustable buffer assembly comprises an abutting ring plate (40) and a connecting ring plate (41) which are movably sleeved on the inner end of the air supply pipe (37) at intervals, the abutting ring plate (40) is arranged close to the propulsion plate (9), the connecting ring plate (41) is rotatably abutted on the air distribution plate (38), and a plurality of buffer springs (42) are fixedly connected at equal intervals between the abutting ring plate (40) and the connecting ring plate (41), an external thread section is provided on the air supply pipe (37) outside the propulsion plate (9), and a limit knob (43) is screwed on the external thread section of the air supply pipe (37) whose inner side surface is rotatably abutted against the propulsion plate (9); a plurality of sliding-assisting balls (44) are equidistantly and rollingly embedded on the outer side surface of the abutting ring plate (40) and the inner side surface of the limit knob (43).

5. The plasma arc welding device for producing a cassette furnace shell according to claim 1, characterized in that: The loading and unloading mechanism comprises a mounting groove provided in each end portion of the herringbone rotating seat (19), a main electric push rod (20) fixed in the mounting groove, an arc seat (21) installed at the telescopic end of the main electric push rod (20), a receiving channel provided inside the front and rear ends of the arc seat (21), and an arc hoop plate (22) slidably installed inside the sliding channel, wherein the outer end of the arc hoop plate (22) extends from the end portion of the arc seat (21), a drive box (23) is installed on the outer side of the front and rear ends of the arc seat (21), and a locking drive assembly for extending the arc hoop plate (22) is installed in the drive box (23); a drive groove is provided in the middle of the inner side surface of the herringbone rotating seat (19), and a rotating assembly is installed in the drive groove.

6. The plasma arc welding device for producing a cassette furnace shell according to claim 5, characterized in that: The lower parts of both side surfaces of the arc-shaped seat (21) are fixedly connected with cross bars, and the outer ends of the cross bars are fixedly mounted with auxiliary electric push rods (31), and the telescopic ends of the auxiliary electric push rods (31) are mounted with arc-shaped clamping plates (32) in the same direction as the notches of the arc-shaped seat (21), and anti-rotation arc strips (30) are mounted on the inner arc surfaces of the arc-shaped seat (21) and the arc-shaped clamping plates (32), and anti-slip grooves are transversely opened on the inner arc surface of the arc-shaped hoop plate (22).

7. The plasma arc welding device for producing a cassette furnace shell according to claim 5, characterized in that: The locking drive assembly comprises an arc groove provided on the outer arc surface of the arc hoop plate (22), an arc rack (24) installed in the arc groove, a rotating rod (25) arranged inside the drive box (23) for transverse rotation, a first gear (26) fixedly sleeved on the middle part of the rotating rod (25), and a worm gear (28) fixedly sleeved on one end of the rotating rod (25), the outer walls of the front and rear ends of the arc seat (21) are provided with a transmission port for the teeth of the first gear (26) to pass through, and the first gear (26) is meshed with the arc rack (24) through the transmission port for transmission, so as to adjust the arc hoop plate (22) to extend and retract in the arc channel; a worm (27) meshed with the worm gear (28) is rotatably provided inside one side of the drive box (23), and a micro motor (29) coaxially fixed to one end of the worm gear (27) is installed outside the drive box (23).

8. The plasma arc welding device for producing a cassette furnace shell according to claim 7, characterized in that: The inner ends of both sides of the drive box (23) are fixedly connected with guide slides for preventing the arc hoop plate (22) from being deflected during the storage process, the inner side of the guide slide is protruded with a guide arc bar, and both sides of the arc hoop plate (22) are equipped with guide arc grooves for preventing deflection in conjunction with the guide arc bar.

9. The plasma arc welding device for producing a cassette furnace shell according to claim 5, characterized in that: The rotating assembly includes a self-locking motor (34) fixed laterally on the inner wall of the driving groove and a second gear (35) fixedly mounted on the driving shaft of the self-locking motor (34). The telescopic end of the electric push cylinder (18) is movable and penetrates into the interior of the driving groove and is fixedly connected to a fixed gear ring (33) meshing with the second gear (35). The self-locking motor (34) drives the second gear (35) to rotate, so that the second gear (35) performs a reciprocating circular motion around the fixed gear ring (33), thereby causing the herringbone rotating seat (19) to rotate back and forth with the telescopic end of the electric push cylinder (18) as the center of the circle to perform an alternating loading and unloading operation.

10. The plasma arc welding device for producing a cassette furnace shell according to claim 1, characterized in that: The lifting assembly includes a lead screw (14) that is vertically rotated and arranged inside the column (13), a lifting seat (15) that is sleeved on the lead screw (14), and a servo motor (16) installed at the bottom end of the lead screw (14). The servo motor (16) is fixed in the lower part of the column (13). A guide strip opening is vertically opened on the side of the column (13), and a connecting block is fixedly connected to one side of the lifting seat (15), and the outer end of the connecting block is fixedly connected to the sliding seat (17).

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