Automatic bulging equipment for cylindrical shell

Abstract

The invention discloses automatic bulging equipment for a cylindrical shell, which relates to the technical field of shell processing and comprises a rack, a feeding mechanism, a bulging mechanism, a first grabbing mechanism, a second grabbing mechanism and a discharging mechanism. The feeding mechanism is arranged on the machine frame, and continuous feeding is achieved through an inclined material frame and a conveying belt. The bulging mechanism comprises a main machine and an inflatable shaft, and the inflatable shaft is sleeved with a shell to generate radial expansive force to complete bulging; the first grabbing mechanism and the second grabbing mechanism are driven by a plurality of sliding tables and an air cylinder, and transfer of the shell from feeding to the bulging mechanism and transfer of the shell from the bulging mechanism to the discharging mechanism are achieved respectively. The discharging mechanism conveys finished products through a conveying belt. According to the equipment, a full-automatic process is constructed through cooperation of all the mechanisms, the machining precision and the intact shell are guaranteed through the design of the rubber clamping blocks and the inflatable shafts, multi-specification adaptability is achieved, the labor cost and the damage rate are reduced, and the production efficiency and safety are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of processing equipment, and particularly relates to an automatic bulging device for a cylindrical shell. BACKGROUND

[0002] The shape precision of a cylindrical shell directly affects the subsequent assembly precision and overall performance of a product, and cylindrical shells are widely used due to uniform stress and strong adaptability. In the processing flow of a cylindrical shell, the bulging process is a key link for ensuring that the cylindrical shell meets the roundness requirement. In this process, uniform radial force is applied to the inner wall of the formed cylindrical shell to correct the deformation caused by rolling, welding or stamping during the production process, so as to ensure the regular shape of the shell.

[0003] At present, the bulging processing of a cylindrical shell in the industry is mostly semi-automated or manually operated. In this mode, the operator manually places the shell to be processed one by one on the bulging tool in the feeding link, and then manually takes it down and transports it to the discharging area after the bulging is completed. The entire process relies on the continuous intervention of the operator. This processing method has many drawbacks. On the one hand, manual operation is inefficient, and only a single workpiece can be processed at a time. The taking, placing and positioning in the feeding and discharging processes are time-consuming, and it is difficult to meet the rhythm requirements of mass production. On the other hand, the precision stability of manual positioning is poor, and the experience difference or operation deviation of the operator can easily cause the positioning of the shell on the bulging tool to deviate, which in turn causes uneven bulging force and quality problems such as inconsistent shell wall thickness and roundness out-of-tolerance. At the same time, the involvement of manual operation increases labor costs, and long-term repetitive operation can easily cause operator fatigue, further increasing the operation error rate and safety hazards. Therefore, it is an urgent need for the development of the industry to develop a device that can realize the automatic bulging of a cylindrical shell throughout the process, to solve the problems of high dependence on manual operation, low efficiency and unstable quality. SUMMARY

[0004] The purpose of the present application is to provide an automatic bulging device for a cylindrical shell to solve the problems raised in the background.

[0005] Therefore, the present application provides an automatic bulging device for a cylindrical shell, which comprises: a rack; a feeding mechanism provided on the rack for continuous feeding of the cylindrical shell; a bulging mechanism provided beside the rack for positioning the cylindrical shell and supporting the inner wall of the cylindrical shell by generating radial bulging force along the cylindrical shell, so that the cylindrical shell is bulged into a cylindrical shape; a first grabbing mechanism provided on the rack, the first grabbing mechanism being used to grab the cylindrical shell on the feeding mechanism and position it on the bulging mechanism; A second grabbing mechanism is arranged on the frame, and is used to grab the cylindrical shell after the bulging mechanism finishes bulging. A blanking mechanism is arranged on the frame and receives the cylindrical shell grabbed by the second grabbing mechanism.

[0006] In the present application, a further embodiment is that the feeding mechanism comprises a first support frame fixed on the frame, a first conveying belt arranged on the first support frame and driven, a feeding frame arranged on the first support frame at one end of the first conveying belt, and a stopper arranged on the other end of the first support frame.

[0007] In the present application, a further embodiment is that the bulging mechanism comprises a workbench arranged beside the frame, a main machine arranged on the workbench, and a gas bulging shaft connected to the output end of the main machine, wherein the cylindrical shell is sleeved on the gas bulging shaft, and the radial bulging force of the gas bulging shaft is generated by the work of the main machine to press the inner wall of the cylindrical shell.

[0008] In the present application, a further embodiment is that the first grabbing mechanism comprises a second support frame fixed on the frame, a first sliding table arranged on the second support frame, a second sliding table slidingly arranged on the first sliding table, and a third sliding table slidingly arranged on the second sliding table, wherein the third sliding table is provided with a grabbing assembly, the grabbing assembly comprises a first rotary air cylinder, the output end of the first rotary air cylinder is connected with a fixed block, a fixed disc is sleeved on the fixed block, a plurality of positioning blocks are fixed on the fixed block at the end of the fixed block and arranged along the radial direction of the fixed block, a clamping block is fixed on the positioning block, a clamping block is arranged on the inner side of the clamping block, a positioning ring is further arranged on the outer side of the clamping block, the positioning ring and the fixed disc are connected through a connecting rod, a spring is sleeved on the connecting rod, the spring is arranged between the fixed disc and the positioning ring, the clamping block passes through the positioning ring and is clamped by the clamping block, and the cylindrical shell is limited by the positioning ring.

[0009] In the present application, a further embodiment is that the second grabbing mechanism comprises a third support frame fixed on the frame, a fourth sliding table arranged on the third support frame, a fifth sliding table movably arranged on the fourth sliding table, and a sixth sliding table movably arranged on the fifth sliding table, wherein the sixth sliding table is provided with a second rotary air cylinder, and the output end of the second rotary air cylinder is connected with a clamping assembly.

[0010] In the present application, a further embodiment is that the blanking mechanism comprises a fourth support frame fixed on the frame, and a second conveying belt arranged on the fourth support frame.

[0011] In the present application, further embodiments are that the clamp block is a rubber block.

[0012] The beneficial effects of the present application are: 1. Realize full-process automatic operation, significantly improve production efficiency and reduce labor cost. The device cooperates with the feeding mechanism, the first grabbing mechanism, the bulging mechanism, the second grabbing mechanism and the discharging mechanism to build a complete automatic production line from continuous feeding of the to-be-processed cylindrical shell, automatic transfer positioning, bulging processing to automatic discharge of the finished product. The whole process does not need manual workpiece taking, transferring and positioning operation. The feeding mechanism can realize continuous feeding, the grabbing mechanism can complete the workpiece transfer between processes by precise action, and the discharging mechanism can timely receive and deliver the finished product, effectively reducing the production interruption time and greatly improving the workpiece processing amount per unit time. At the same time, automatic operation reduces the demand for operators, reduces labor cost investment, and avoids subjective errors in manual operation process, providing stable and efficient guarantee for batch production.

[0013] 2. Improve bulging processing precision and product consistency, and ensure stable quality of cylindrical shell. The bulging mechanism in the device can adaptively position the cylindrical shell to ensure that the shell is fixed in position during bulging to avoid deviation when stressed; at the same time, it supports the inner wall of the shell by generating uniform radial bulging force, so that the shell is uniformly stressed and accurately formed into a cylindrical shape. The first grabbing mechanism accurately grabs and positions the shell on the feeding mechanism to the bulging mechanism, and the second grabbing mechanism smoothly grabs the finished product. The positioning precision and transfer stability of the workpiece in the whole process are effectively controlled, reducing the processing errors caused by positioning deviation or transfer collision. This precise and standardized processing mode ensures consistent bulging effect of each cylindrical shell, significantly reduces the product rejection rate, and improves the stability and reliability of product quality. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the present application Figure 1 ; Figure 2 is a structural schematic diagram of the present application Figure 2 ; Figure 3 is a structural schematic diagram of the present application Figure 3 ; Figure 4 is an enlarged schematic view of A part in Figure 2 ; Figure 5 is an enlarged schematic view of B part in Figure 3 . DETAILED DESCRIPTION

[0015] With reference to the drawings and the embodiments described herein, it will be understood that the drawings and embodiments are illustrative of only a few of the embodiments of the present application and are not therefore to be considered limiting of its scope, for the application is not limited to the embodiments illustrated in the description below.

[0016] In the description of the present application, it should be understood that the terms used herein are for the purpose of describing specific embodiments and are not intended to limit the example embodiments of the present application. For the purpose of clarity, the dimensions of the various parts shown in the drawings are not drawn to scale. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be understood that the techniques, methods, and apparatus are part of the prior art and should be understood to be incorporated into the disclosure in order to fully enable the present application. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of the example embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0017] It should be noted that the terms "first", "second", and the like, used in the description and the claims of the present application are used to differentiate similar objects, and are not intended to describe a particular sequential or chronological order. It should be understood that the data used in this way can be interchanged, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the objects before and after are in an "or" relationship.

[0018] It should be noted that in the description of the present application, the terms of orientation such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are used only for the purpose of facilitating the description of the present application and simplifying the description, and in the absence of contrary description, these orientation terms do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be understood as limiting the scope of protection of the present application. The orientation terms "inner, outer" refer to the inner and outer relative to the outline of the parts themselves.

[0019] It is to be understood that the terminology "including", "containing" or any other reflection thereof, in the specification herein, is taken to encompass the inclusion of one or more elements, but not the exclusion of other elements. Unless specified otherwise, the description herein of any aspect or embodiment of the application is meant to apply to any other aspect or embodiment of the application. It is also to be understood that the use of "a" or "an", which describes useful embodiments of the application, indicates that one or more parameters can be used, i.e. other parameters can be present in addition to the one or more parameters. Still further, where certain features of the application are expressly identified, other combinations of features are implied.

[0020] The embodiment provides an automatic bulging device for a cylindrical shell, comprising: a rack 1 serving as a mounting base and bearing frame of the whole device, which is welded by high-strength steel material, stable in structure and high in flatness, and capable of providing a stable mounting reference for various functional mechanisms and effectively avoiding processing errors caused by rack 1 shaking during device operation; a feeding mechanism 2 fixedly arranged at a specified area of the rack 1 and specially used for realizing continuous and orderly feeding of the cylindrical shell, capable of meeting the requirement of continuous feeding in mass production and reducing the trouble of frequent manual feeding; a bulging mechanism 6 precisely arranged at a corresponding station beside the rack 1, and the core function of which is to adaptively position and clamp the cylindrical shell and simultaneously generate bulging force uniformly distributed along the cylindrical shell in a radial direction through an internal driving structure, the bulging force stably acting on the inner wall of the cylindrical shell, so that the shell precisely deformed in the forming process is precisely stretched into a regular cylinder, thereby guaranteeing the cylindrical accuracy of the shell; a first grabbing mechanism 3 installed on the rack 1 and corresponding to the transfer path between the feeding mechanism 2 and the bulging mechanism 6, which has multidimensional motion adjustment capability, can precisely grab the cylindrical shell to be processed on the feeding mechanism 2, and stably place the shell on the processing station of the bulging mechanism 6 according to preset positioning parameters, thereby realizing automatic transfer of the workpiece from the feeding link to the processing link and replacing manual taking and placing to improve efficiency; a second grabbing mechanism 4 also arranged on the rack 1 and corresponding to the area between the bulging mechanism 6 and a discharging mechanism 5, which is used for timely and stably grabbing the cylindrical shell from the bulging mechanism 6 after the bulging processing of the cylindrical shell is completed, so as to avoid the influence of the workpiece retained after processing on subsequent production; and the discharging mechanism 5 fixed at the finished product output end of the rack 1 and specially used for receiving and conveying the cylindrical shell after the bulging processing transferred by the second grabbing mechanism 4, thereby realizing orderly collection and conveying of the finished product. Through the coordinated cooperation of the mechanisms, the whole device constructs a full-automatic processing flow from raw material feeding to finished product output, greatly improves production efficiency and reduces labor cost.

[0021] In the embodiment, the feeding mechanism 2 comprises a first support frame 20 connected to the rack 1 by bolt fastening. The support frame adopts a profile splicing structure, which has the characteristics of lightweight and high strength, and can provide reliable support for subsequent components. A first conveying belt 21 capable of stable transmission is assembled on the first support frame 20. The surface of the conveying belt is treated to prevent slipping, which can effectively prevent the cylindrical shell from sliding and deviating during conveying, and ensure the feeding accuracy. A feeding frame 22 is fixedly installed on the first support frame 20 at the feeding end of the first conveying belt 21. The feeding frame 22 is arranged at an inclined angle, and the inclined angle is optimized to ensure that the cylindrical shell can smoothly slide down by its own gravity, and to avoid the shell from being damaged due to too fast sliding speed. The cylindrical shells to be processed can be placed on the feeding frame 22 in batches, and then are guided to slide into the first conveying belt 21 one by one. The continuous operation of the conveying belt realizes the continuous feeding of the workpieces, and the labor intensity is reduced.

[0022] In the embodiment, the bulging mechanism 6 comprises a workbench 60 placed on the ground beside the rack 1. The bottom of the workbench 60 is provided with leveling foot pads, which can ensure the levelness of the workbench 60 by adjusting the height of the foot pads, thereby laying a foundation for processing accuracy. A main machine capable of stable power output is fixedly installed on the workbench 60. The main machine adopts a servo driving system, which can realize accurate control of power output. The output end of the main machine is rigidly connected with a gas expansion shaft 61 through a shaft coupling. The gas expansion shaft 61 is a prior art, and will not be described in detail in the embodiment. The connection part is precisely machined to ensure coaxiality. The cylindrical shell is accurately sleeved on the gas expansion shaft 61 during processing. The outer diameter of the gas expansion shaft 61 is matched with the inner diameter of the shell, thereby ensuring the initial positioning accuracy. The main machine is started according to the preset processing parameters, and drives the gas expansion shaft 61 to uniformly expand along the radial direction to generate stable bulging force. The bulging force uniformly extrudes the inner wall of the cylindrical shell, so that the deformation part of the shell gradually fits the outer circular contour of the gas expansion shaft 61 under the action of the bulging force, and finally forms a regular cylindrical structure. Compared with the traditional mechanical bulging, the bulging method realized by the gas expansion shaft 61 can make the bulging force more uniform, effectively avoid the problem of uneven wall thickness or cracking caused by excessive local stress of the shell, and improve the stability of product processing quality.

[0023] In the embodiment, the first grabbing mechanism 3 comprises a second support frame 30 fixedly connected with the rack 1, the structure of the support frame is designed through mechanical analysis and can bear the weight of the grabbing assembly and the workpiece without deformation; it also comprises a first sliding table 31, a second sliding table 32 and a third sliding table 33 which cooperate with each other, wherein the first sliding table 31 is fixed on the second support frame 30 in the horizontal direction, the second sliding table 32 is slidingly assembled on the first sliding table 31 and can move along the X-axis direction, and the third sliding table 33 is slidingly arranged on the second sliding table 32 and can move along the Y-axis direction. Through the combined movement of the three sliding tables, the grabbing assembly has precise movement capability and can flexibly adjust the grabbing position; the third sliding table 33 is fixedly provided with a grabbing assembly through a mounting seat, the grabbing assembly comprises a first rotary air cylinder 34 which has a rotary positioning function, the rotary angle of the air cylinder can be accurately set through a control system to meet the grabbing and placing requirements of different angles; the output end of the first rotary air cylinder 34 is connected with a fixed block 35 through a flange, a fixed disc 36 which is fixed in position is sleeved on the fixed block 35, and the fixed disc 36 cooperates with a subsequent connecting rod 301 mechanism to realize the positioning function; a plurality of positioning blocks 37 which are arranged in the radial direction of the fixed block 35 are uniformly arrayed at the end of the fixed block 35 along the center, the number of the positioning blocks 37 is adaptively designed according to the size of the cylindrical shell to ensure the stable clamping of the shell; a clamping block 38 is fixed on the positioning block 37 through a screw, a clamping block 39 is mounted on the inner side of the clamping block 38, and a positioning ring 300 is further sleeved on the outer side of the clamping block 39; the positioning ring 300 and the fixed disc 36 are connected through a plurality of evenly distributed connecting rods 301, the connecting rods 301 are movably connected between the positioning ring 300 and the fixed disc 36, and the positioning ring 300 can move axially along the connecting rods 301; a compression spring 302 is further sleeved on the connecting rod 301, the spring 302 abuts between the fixed disc 36 and the positioning ring 300 at both ends, and in the natural state, the spring 302 pushes the positioning ring 300 to the position close to the clamping block 39; the clamping block 39 passes through the corresponding hole position on the positioning ring 300, and the cylindrical shell is stably clamped by the clamping block 39, and the circumferential limiting is realized from the outer side of the shell through the positioning ring 300. This double positioning structure inside and outside can ensure that the cylindrical shell does not deviate or fall off during the grabbing and transferring process, ensures the positioning accuracy of the workpiece from grabbing to placing, and provides strong support for the accuracy of the bulging process.

[0024] In this embodiment, the second grabbing mechanism 4 includes a third support frame 40 rigidly connected with the rack 1, the installation position of the support frame is accurately calibrated to ensure that the relative positions of the expansion mechanism 6 and the blanking mechanism 5 meet the transfer requirements; the third support frame 40 is fixedly installed with a fourth sliding table 41, the fourth sliding table 41 is arranged in the horizontal direction to provide a moving track for subsequent components; the fourth sliding table 41 is movably provided with a fifth sliding table 42 through a sliding block, the fifth sliding table 42 can move quickly in the horizontal direction along the fourth sliding table 41; the fifth sliding table 42 is movably provided with a sixth sliding table 43 through a guide structure, the sixth sliding table 43 can realize vertical lifting movement, and through the coordinated action of the fourth, fifth and sixth sliding tables, the grabbing component can realize multidirectional movement; the sixth sliding table 43 is fixedly provided with a second rotary air cylinder 44 through a support, the second rotary air cylinder 44 can adjust the grabbing angle of the finished product according to actual production requirements, which facilitates accurate placement of the workpiece on the blanking mechanism 5; the output end of the second rotary air cylinder 44 is fixedly connected with a clamping assembly through a connecting shaft, and the clamping assembly is the same as the above, which realizes stable and accurate transfer of the finished product from the machining station to the blanking link, and guarantees the continuity of the production process.

[0025] In this embodiment, the blanking mechanism 5 includes a fourth support frame 50 fixedly connected with the rack 1, the height of the support frame is adapted to the conveying height of the second conveying belt 51 to ensure that the finished product can be stably dropped into the conveying belt; the fourth support frame 50 is installed with the second conveying belt 51 through a bearing seat, the conveying belt is made of wear-resistant material, has a long service life, and the conveying speed of the conveying belt can be adjusted according to the production rhythm to match the rhythm of the feeding and machining links; the discharge end of the second conveying belt 51 can be connected with a finished product collecting box or subsequent detection equipment to realize continuous conveying of the finished product and seamless connection with the subsequent process, avoid the influence of finished product accumulation on production efficiency, and at the same time, through automatic blanking and conveying, the link of manual carrying of the finished product is reduced, the risk of damage to the finished product in the carrying process is reduced, and the reliability of the production process is improved.

[0026] In this embodiment, the clamping block 39 is a rubber block, the rubber material has good elasticity and anti-skid performance, when the clamping block 39 contacts with the cylindrical shell, the elasticity of the rubber can make the clamping block 39 tightly fit with the inner wall of the shell, improve the stability of clamping, and at the same time, avoid the problem of scratching the inner wall caused by rigid contact between the metal clamping block 39 and the shell; the anti-skid property of the rubber can further prevent relative sliding of the workpiece during grabbing and transfer to ensure positioning accuracy; in addition, the wear-resistant performance of the rubber material is good, which can prolong the service life of the clamping block 39 and reduce the maintenance cost of the equipment, providing protection for long-term stable operation of the equipment.

[0027] The device not only achieves the core goal of full-process automatic bulging processing, but also unexpectedly produces significant "production environment adaptability improvement and comprehensive cost optimization" dual technical effects. On the one hand, due to the combination of the inclined rack and the anti-skid conveyor belt of the feeding mechanism 2, the design of the rubber clamp block 39 and the spring 302 buffer positioning ring 300 of the grabbing mechanism, and the flexible bulging mode of the bulging mechanism 6 gas bulging shaft 61, the device has good adaptability to different wall thicknesses and different materials (stainless steel, aluminum alloy, carbon steel) cylindrical shells. It does not need to replace special tooling for specific workpieces. Only by adjusting the bulging force parameters of the gas bulging shaft 61 and the clamping force of the grabbing assembly can the processing switching of different specifications of workpieces be completed. The switching time is shortened from 30 minutes of traditional equipment to less than 5 minutes, greatly improving the versatility and production flexibility of the device. This adaptability unexpectedly breaks the limitations of traditional bulging equipment "one machine one use", especially suitable for multi-variety and small-batch production scenarios, reducing the investment cost of special tooling. On the other hand, the automatic collaborative design of each mechanism unexpectedly reduces the contact damage of the workpiece during the transfer process. The rubber clamp block 39 avoids surface scratches caused by rigid clamping. The uniform bulging force of the gas bulging shaft 61 prevents workpiece deformation and cracking. The buffer sliding design of the inclined rack reduces collision damage, so that the finished product qualification rate is improved from 85% of traditional manual operation to more than 99%. At the same time, automatic operation does not require operators to be close to the processing area, avoiding potential safety hazards such as workpiece ejection and high-temperature burns during the bulging process, reducing the enterprise's safety production management cost and accident risk. The "versatility improvement + damage rate reduction + safety guarantee" composite effect far exceeds the expected goal of simply realizing automatic processing, bringing more comprehensive production efficiency optimization to enterprises.

[0028] The embodiments of the present application are described above in combination with the drawings. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims.

Claims

1. An automatic bulging device for a cylindrical shell, characterized in that, include: frame; The feeding mechanism, mounted on the frame, is used for continuous feeding of the cylindrical shell. An expansion mechanism, located next to the frame, is used to adapt and position the cylindrical shell and support the inner wall of the cylindrical shell by generating radial expansion force along the cylindrical shell, so that the cylindrical shell is expanded into a cylindrical shape. The first gripping mechanism is provided on the frame. The first gripping mechanism is used to grip the cylindrical shell on the feeding mechanism and position it on the forming mechanism. The second gripping mechanism is provided on the frame and is used to grip the cylindrical shell after it has been expanded on the expansion mechanism. The unloading mechanism is located on the frame and receives the cylindrical shell gripped by the second gripping mechanism.

2. The automatic bulging device for a cylindrical shell according to claim 1, characterized in that, The feeding mechanism includes a first support frame, which is fixed on the machine frame. The first support frame is equipped with a first conveyor belt that can be driven. A feeding frame is provided on the first support frame at one end of the first conveyor belt. The feeding frame is obliquely arranged. The cylindrical shell slides obliquely from the feeding frame onto the first conveyor belt for continuous feeding. A stop block is provided at the other end of the first support frame. The stop block is used to block the cylindrical shell at the front end.

3. The automatic bulging device for a cylindrical shell according to claim 2, characterized in that, The forming mechanism includes a worktable located next to the frame. A main unit is mounted on the worktable, and the output end of the main unit is connected to an air shaft. The cylindrical shell is fitted onto the air shaft, and the operation of the main unit drives the air shaft to generate radial expansion force to compress the inner wall of the cylindrical shell.

4. The automatic bulging device for a cylindrical shell according to claim 3, characterized in that, The first gripping mechanism includes a second support frame fixed on the machine frame, and also includes a first slide, a second slide, and a third slide. The first slide is mounted on the second support frame, the second slide is slidably mounted on the first slide, and the third slide is slidably mounted on the second slide. A gripping assembly is mounted on the third slide. The gripping assembly includes a first rotary cylinder. The output end of the first rotary cylinder is connected to a fixed block. A fixed plate is fitted on the fixed block. Multiple positioning blocks arranged radially along the center are fixed on the end of the fixed block. A clamping block is fixed on the positioning block. A clamping block is provided inside the clamping block. A positioning ring is provided outside the clamping block. The positioning ring is connected to the fixed plate by a connecting rod. A spring is fitted outside the connecting rod. The spring abuts between the fixed plate and the positioning ring. The clamping block passes through the positioning ring and is clamped by the clamping block. The positioning ring circumferentially limits the cylindrical shell.

5. An automatic bulging device for a cylindrical shell according to claim 4, characterized in that, The second gripping mechanism includes a third support frame, which is fixed on the frame. A fourth slide is provided on the third support frame, a fifth slide is movable on the fourth slide, a sixth slide is movable on the fifth slide, and a second rotary cylinder is provided on the sixth slide. The output end of the second rotary cylinder is connected to a gripping component.

6. An automatic bulging device for a cylindrical shell according to claim 5, characterized in that, The feeding mechanism includes a fourth support frame, which is fixed on the machine frame, and a second conveyor belt is provided on the fourth support frame.

7. An automatic bulging device for a cylindrical shell according to claim 6, characterized in that, The clamping block is a rubber block.

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