End socket half-tube forming machine

Abstract

The invention discloses an end socket half-pipe forming machine, and relates to the technical field of end socket half-pipe machining, the end socket half-pipe forming machine comprises a machining table, the top of the machining table is fixedly connected with a guide frame, and a half-pipe machining part is arranged above the machining table; the layered pressing device is arranged at the top of the machining table and used for conducting graded extrusion on the half-pipe machined part, by arranging the layered pressing device, the bending radians of the two sides of the half-pipe machined part are decomposed into three times through graded pressing, and machining errors caused by one-time large-radian bending are avoided; meanwhile, if the half-pipe machined part is bent to the final radian at a time, the material can bear large instantaneous stress, cracks or wrinkles or excessive plastic deformation is prone to occurring, the bending radian is gradually increased through multi-time pressing, the internal stress of the material can be slowly released, damage caused by stress concentration is reduced, and the service life of the material is prolonged. And the mechanical properties (such as strength and toughness) of a semi-pipe machined part are not damaged, so that the forming rate of the end socket semi-pipe is improved.

Description

Technical Field

[0001] This invention relates to the field of end cap and semi-tube processing technology, and in particular to an end cap and semi-tube forming machine. Background Technology

[0002] A head half-pipe is a component used in pressure vessels and other equipment. It is usually installed on the outside of the head and is mainly used for heating, cooling or insulation. The head half-pipe is generally made by cutting and shaping a tube and then spirally winding it around the outside of the head, connecting it with the cylindrical half-pipe to form a jacket structure.

[0003] Existing end-cap semi-tube forming machines first place the iron plate raw material between the convex and concave rollers for one-time pressing and forming when pressing and forming the semi-tube. However, if the iron plate is bent to the final arc shape in one go, it will cause excessive internal stress. As a result, when the pressed and formed workpiece is removed from the inside of the convex and concave rollers, it will produce a large springback deformation, which will ultimately lead to a significant decrease in the forming rate of the semi-tube. To address this problem, we provide an end-cap semi-tube forming machine. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problem that the existing end cap semi-tube forming machine can easily cause large springback deformation of the formed product due to excessive internal stress when pressing iron plate raw materials into shape in one go, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a head-end semi-tube forming machine, which solves the problem.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a head-end semi-tube forming machine, the device comprising: a processing table, a guide frame fixedly connected to the top of the processing table, and a semi-tube processing part disposed above the processing table; a layer presser disposed on the top of the processing table for performing multiple extrusions on the semi-tube processing part; a holding unit disposed on the top of the processing table for reducing the springback of the semi-tube processing part caused by bending after the first and second pressings; and a final holding auxiliary component disposed on the top of the processing table for reducing the springback of the semi-tube processing part caused by bending after the third pressing.

[0008] In a preferred embodiment of the end cap semi-tube forming machine of the present invention, the layer presser includes a first set of pressing components, a second set of pressing components and a third set of pressing components rotatably connected to the top of the processing table. The first set of pressing components consists of a first convex roller and a first concave roller, the second set of pressing components consists of a second concave roller and a second convex roller, and the third set of pressing components consists of a third concave roller and a third convex roller.

[0009] In a preferred embodiment of the end cap semi-tube forming machine of the present invention, the curvature of the first group of pressing parts, the second group of pressing parts and the third group of pressing parts increases from right to left.

[0010] In a preferred embodiment of the end cap semi-tube forming machine of the present invention, the holding unit includes two fixed plates fixed to the top of the processing table, two connecting plates fixedly connected to one side of the fixed plates, a fixed frame fixedly connected to one end of the connecting plates, a drive motor fixedly connected to one side of the fixed frame, a rotating frame fixedly connected to the output end of the drive motor, and an auxiliary limiting plate fixedly connected to one end of the rotating frame.

[0011] In a preferred embodiment of the end cap semi-tube forming machine of the present invention, the two fixing plates are respectively disposed between the first concave roller and the second concave roller, and between the second concave roller and the third concave roller.

[0012] In a preferred embodiment of the end cap semi-tube forming machine of the present invention, the holding unit further includes a plurality of second pressure rollers rotatably connected to the inner side of the auxiliary limiting plate, and the contact position between the auxiliary limiting plate and the semi-tube workpiece is provided with a guide slope.

[0013] In a preferred embodiment of the end cap semi-tube forming machine of the present invention, the final retaining auxiliary component is fixedly connected to a rectangular seat on the top of the processing table. A plurality of first pressure rollers are provided on one side of the rectangular seat, and each set of first pressure rollers is provided with a plurality of rollers. One end of the first pressure roller is provided with a limiting component for limiting the springback of the semi-tube processed part.

[0014] In a preferred embodiment of the end cap semi-tube forming machine of the present invention, the limiting component includes a plurality of movable grooves formed on one side of the rectangular seat, each movable groove having a limiting slider slidably connected inside, and a spring installed between the limiting slider and the movable groove, and a first pressure roller rotatably connected to one side of each limiting slider.

[0015] In a preferred embodiment of the end cap semi-tube forming machine of the present invention, the elastic coefficient of the spring increases from right to left, and the height of the moving groove increases from right to left.

[0016] In a preferred embodiment of the end cap semi-tube forming machine of the present invention, the final holding auxiliary component further includes a plurality of fixed seats fixedly connected to one side of the rectangular seat, and a guide roller is rotatably connected to the inner side of each fixed seat.

[0017] The beneficial effects of this invention are:

[0018] 1. This invention utilizes a layered pressing device. When a semi-tube part needs to be pressed and formed, the semi-tube part is first passed through a guide frame, then enters between the first convex roller and the first concave roller for the first pressing. At this time, both sides of the semi-tube part are bent by a certain arc (one-third of the final forming arc). Then, it enters between the second concave roller and the second convex roller for the second pressing (again, pressing by one-third of the arc), and so on, until the third pressing bends both sides of the semi-tube part to the final forming shape. This is achieved through layered pressing. The bending radius of the semi-tube part is decomposed into three parts (each part being about one-third of the final forming radius) to avoid processing errors caused by bending a large radius at once. At the same time, if the semi-tube part is bent to the final radius at once, the material will be subjected to large instantaneous stress, which can easily lead to problems such as cracks, wrinkles or excessive plastic deformation. By pressing in stages to gradually increase the bending radius, the internal stress of the material can be released slowly, reducing damage caused by stress concentration and ensuring that the mechanical properties (such as strength and toughness) of the semi-tube part are not damaged, thereby improving the forming rate of the end cap semi-tube.

[0019] 2. This invention, by setting up a holding unit, activates a drive motor to rotate the rotating frame when the semi-tube part enters between the fixed frame and the auxiliary limiting plate. The rotating frame then drives multiple second pressure rollers at the bottom of the auxiliary limiting plate (the distribution of these second pressure rollers matches the curvature of the semi-tube part during its forming process) to restrict the bent edges on both sides of the semi-tube part. By "shaping and limiting" the bent edges, defects such as wrinkles and outward turning due to material springback or uneven stress are avoided. This also maintains the posture control effect of the fixed frame and the guide slope, preventing the loss of previous correction results. Furthermore, it provides "pre-positioning" for the semi-tube that is about to enter the second concave roller and the second convex roller, ensuring that the contact position of its bent edge with the next set of rollers is precisely aligned, thereby further improving the forming rate of the semi-tube part.

[0020] 3. This invention, by setting a final holding auxiliary component, ensures that when the semi-tube workpiece is pressed for the third time, due to the increasing elastic coefficient of the spring from right to left and the increasing height of the moving groove from right to left, the semi-tube workpiece moves from between the third concave roller and the third convex roller to one side of the rectangular seat. At this time, the semi-tube workpiece enters between multiple sets of first pressure rollers. When the semi-tube workpiece passes through the first set of first pressure rollers, the bent edges on both sides of the semi-tube workpiece are limited for the first time. When the bent edges of the semi-tube workpiece spring back, they push the first set of first pressure rollers to move inside the moving groove. When the limiting slider drives the first pressure roller to move to the maximum limit (contacting the bottom of the moving groove), the movement stops. Then, the semi-tube workpiece enters the second set of first pressure rollers, and the above work is repeated. The first pressure rollers limit the bent edges of the semi-tube workpiece three times. After the semi-tube workpiece is pressed for the third time, there may still be unreleased springback stress inside the material, and the stress distribution may change with position (e.g., edge stress is greater than...). In the middle section, the first pressure roller of the first group has the smallest spring elasticity coefficient. When the bent edge rebounds, the first pressure roller slides in the moving groove with the limiting slider (absorbing the initial rebound stress through spring deformation) until the limiting slider touches the bottom of the moving groove. At this time, the bottom of the moving groove provides rigid support, forming a composite constraint of "elastic buffer + rigid limit". This can avoid material damage caused by instantaneous rigid impact and limit excessive rebound through the fixed position of the bottom of the moving groove. The spring elasticity coefficients of the first pressure rollers of the second and third groups increase in turn, and the height of the moving groove increases in turn (to better fit the final forming curvature). As the semi-tube processing part is fed, the rebound stress faced by the latter two groups of first pressure rollers may be more concentrated (such as the edge area near the forming end point). A larger elasticity coefficient can provide stronger preload, and with the higher position of the bottom of the moving groove (matching the final curvature of the bent edge), the target shape is accurately locked through "rigid limit", and the residual stress is gradually reduced to the minimum.

[0021] The three-stage limiting mechanism forms a "buffering-constraint-locking" step process, ensuring that the springback from the front end to the back end of the workpiece is controlled in a targeted manner, avoiding deformation caused by local stress concentration. For local areas with obvious springback, the first pressure roller of the first group absorbs the fluctuations in a flexible manner through spring compression and movement within the groove, avoiding excessive local stress caused by rigid pressure. After entering the second group, as the springback fluctuations decrease, the medium elasticity begins to "finely level" the area, making the springback amount of each section of the bent edge tend to be consistent. The strong elasticity of the third group applies stable pressure to the already uniform bent edge, ensuring the consistency of the overall shape. For example, the curvature deviation and perpendicularity error of the bent edges on both sides are controlled to a minimum, eliminating residual springback, ensuring shape consistency, stabilizing the final dimensional accuracy, thereby improving the forming rate of the semi-tube workpiece. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0023] Figure 1 This is an overall structural diagram of the present invention.

[0024] Figure 2 This is a schematic diagram of one side of the rectangular base structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the three sets of pressing components of the present invention.

[0026] Figure 4 This is a schematic diagram of one side of the fixing plate structure of the present invention.

[0027] Figure 5 This is a diagram showing the auxiliary limiting plate of the present invention in an open state.

[0028] Figure 6 This is a schematic diagram of the first pressure roller arrangement of the present invention.

[0029] Figure 7 This is a schematic diagram of the internal structure of the fixing plate of the present invention.

[0030] Figure 8 This is a diagram showing the working state of the second pressure roller of the present invention.

[0031] In the diagram: 1. Processing table; 2. First convex roller; 3. First concave roller; 4. Fixing plate; 5. Semi-tube processing part; 6. Rectangular seat; 7. First pressure roller; 8. Moving groove; 9. Spring; 10. Rotating frame; 11. Fixing frame; 12. Auxiliary limiting plate; 13. Drive motor; 14. Second pressure roller; 15. Guide slope; 16. Fixing seat; 17. Guide roller; 18. Limiting slider; 19. Second concave roller; 20. Second convex roller; 21. Third concave roller; 22. Third convex roller; 23. Guide frame; 24. Connecting plate. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0036] Reference Figures 1-8 A head-end semi-tube forming machine is provided, including: a processing table 1, a guide frame 23 fixedly connected to the top of the processing table 1, and a semi-tube processing part 5 arranged above the processing table 1; a layer presser, arranged on the top of the processing table 1, for extruding the semi-tube processing part 5 in stages, the layer presser including a first set of pressing parts, a second set of pressing parts and a third set of pressing parts rotatably connected to the top of the processing table 1, the first set of pressing parts consisting of a first convex roller 2 and a first concave roller 3, the second set of pressing parts consisting of a second concave roller 19 and a second convex roller 20, and the third set of pressing parts consisting of a third concave roller 21 and a third convex roller 22, the curvature of the first set of pressing parts, the second set of pressing parts and the third set of pressing parts increasing from right to left;

[0037] The first convex roller 2 and the first concave roller 3, the second concave roller 19 and the second convex roller 20, the third concave roller 21 and the third convex roller 22 are all driven by servo motors.

[0038] When the semi-tube part 5 needs to be pressed and formed, it is first passed through the guide frame 23, and then the semi-tube part 5 enters between the first convex roller 2 and the first concave roller 3 to be pressed for the first time. At this time, the two sides of the semi-tube part 5 are bent by a certain arc (one-third of the final forming arc). Then it enters between the second concave roller 19 and the second convex roller 20 for the second pressing (pressing one-third of the arc again), and so on, until the third pressing bends the two sides of the semi-tube part 5 to the final forming shape. This is done through multiple pressing steps. The bending radius of the semi-tube part is decomposed into three parts (each part being about one-third of the final forming radius) to avoid processing errors caused by bending a large radius at once. At the same time, if the semi-tube part is bent to the final radius at once, the material will be subjected to large instantaneous stress, which can easily lead to problems such as cracks, wrinkles or excessive plastic deformation. By pressing in stages and gradually increasing the bending radius, the internal stress of the material can be released slowly, reducing damage caused by stress concentration and ensuring that the mechanical properties (such as strength and toughness) of the semi-tube part are not damaged, thereby improving the forming rate of the end cap semi-tube.

[0039] Reference Figures 4-8 A retaining unit is provided on the top of the processing table 1 to reduce the springback caused by bending of the semi-tube workpiece 5 after the first and second pressing. The retaining unit includes two fixed plates 4 fixed on the top of the processing table 1. Two connecting plates 24 are fixedly connected to one side of the fixed plates 4. A fixed frame 11 is fixedly connected to one end of the connecting plates 24. A drive motor 13 is fixedly connected to one side of the fixed frame 11. A rotating frame 10 is fixedly connected to the output end of the drive motor 13. An auxiliary limiting plate 12 is fixedly connected to one end of the rotating frame 10. The two fixed plates 4 are respectively arranged between the first concave roller 3 and the second concave roller 19, the second concave roller 19 and the third concave roller 21. The retaining unit also includes a plurality of second pressure rollers 14 rotatably connected to the inner side of the auxiliary limiting plate 12. A guide slope 15 is provided at the contact position between the auxiliary limiting plate 12 and the semi-tube workpiece 5.

[0040] When the semi-tube workpiece 5 is pressed for the first time by the first convex roller 2 and the first concave roller 3 and enters the fixed frame 11, if one end of the semi-tube workpiece 5 has a certain tilt angle, it first contacts the guide inclined surface 15. Under the action of the guide inclined surface 15, the semi-tube workpiece 5 is correctly guided and enters between the auxiliary limiting plate 12 and the fixed frame 11. The guide inclined surface 15 applies a lateral or vertical correction force to the tilted end of the semi-tube through the inclined contact surface. By using the guiding characteristics of the inclined surface, the semi-tube workpiece 5 is "forced" to return to the preset feed path, quickly eliminating the initial tilt, thereby improving the stability foundation for subsequent processing.

[0041] When the semi-tube part 5 enters between the fixed frame 11 and the auxiliary limiting plate 12, the drive motor 13 is started to drive the rotating frame 10 to rotate. The rotating frame 10 drives multiple second pressure rollers 14 at the bottom of the auxiliary limiting plate 12 (the distribution of multiple second pressure rollers 14 matches the curvature of the semi-tube part 5 during the forming process) to restrict the bending edges on both sides of the semi-tube part 5. By "shaping and limiting" the bending edges, defects such as wrinkles and outward turning due to material springback or uneven force are avoided. The posture control effect of the fixed frame 11 and the guide slope 15 is continued, avoiding the loss of the previous correction results. It also provides "pre-positioning" for the semi-tube that is about to enter the second concave roller 19 and the second convex roller 20, ensuring that the contact position of its bending edge corresponds precisely with the contact position of the next set of rollers, thereby improving the forming rate of the semi-tube part 5.

[0042] Reference Figures 2-7The final retaining auxiliary component is set on the top of the processing table 1 to reduce the springback caused by the bending of the semi-tube processing part 5 after the third pressing. The final retaining auxiliary component is fixedly connected to the rectangular seat 6 on the top of the processing table 1. Multiple sets of first pressure rollers 7 are set on one side of the rectangular seat 6, and multiple sets of first pressure rollers 7 are set in each set. One end of the first pressure roller 7 is provided with a limiting component for limiting the springback of the semi-tube processing part 5. The limiting component includes multiple moving grooves 8 opened on one side of the rectangular seat 6. A limit slider 18 is slidably connected inside each moving groove 8, and a spring 9 is installed between the limit slider 18 and the moving groove 8. A first pressure roller 7 is rotatably connected to one side of each limit slider 18. The elastic coefficient of the spring 9 increases from right to left, and the height of the moving groove 8 increases from right to left. The final retaining auxiliary component also includes multiple fixed seats 16 fixedly connected to one side of the rectangular seat 6. A guide roller 17 is rotatably connected to the inner side of each fixed seat 16.

[0043] When the semi-tube part 5 is pressed for the third time, due to the increasing elastic coefficient of the spring 9 from right to left and the increasing height of the moving groove 8 from right to left, the semi-tube part 5 moves from between the third concave roller 21 and the third convex roller 22 to one side of the rectangular seat 6. At this time, the semi-tube part 5 enters between multiple sets of first pressure rollers 7. When the semi-tube part 5 passes through the first set of first pressure rollers 7, the bent edges on both sides of the semi-tube part 5 are limited for the first time. When the bent edges of the semi-tube part 5 spring back, they push the first set of first pressure rollers 7 to move inside the moving groove 8. When the limiting slider 18 drives the first pressure roller 7 to move to the maximum limit (contacting the bottom of the moving groove 8), the movement stops. Then the semi-tube part 5 enters the second set of first pressure rollers 7, and the above work is repeated. The first pressure rollers 7 limit the bent edges of the semi-tube part 5 three times. After the third pressing, there may still be unreleased springback stress inside the material of the semi-tube part 5, and the stress distribution may change with position (e.g., the edge stress is greater than the middle stress). The first pressure roller 7 of the first group has the smallest spring elasticity coefficient. When the bent edge rebounds, the first pressure roller 7 first slides in the moving groove 8 with the limiting slider 18 (absorbing the initial rebound stress through the deformation of the spring 9) until the limiting slider 18 touches the bottom of the moving groove 8. At this time, the bottom of the moving groove 8 provides rigid support, forming a composite constraint of "elastic buffer + rigid limit". This can avoid material damage caused by instantaneous rigid impact and limit excessive rebound through the fixed position of the bottom of the moving groove 8. The spring elasticity coefficients of the second and third groups of first pressure rollers 7 increase in sequence, and the height of the moving groove 8 increases in sequence (to better fit the final forming arc). As the semi-tube processing part is fed, the rebound stress faced by the latter two groups of first pressure rollers 7 may be more concentrated (such as the edge area near the forming end point). A larger elasticity coefficient can provide stronger pre-tightening force. Combined with the higher position of the bottom of the moving groove 8 (matching the final arc of the bent edge), the target shape is accurately locked through "rigid limit", and the residual stress is gradually reduced to the minimum.

[0044] The three-stage limiting process forms a "buffering-constraint-locking" step process, ensuring that the springback from the front end to the back end of the workpiece is controlled in a targeted manner, avoiding deformation caused by local stress concentration. For local areas with obvious springback, the first pressure roller 7 of the first group is compressed by the spring 9 and moves in the moving groove 8. It first absorbs the fluctuation in a flexible way to avoid excessive local pressure caused by rigid pressing. After entering the second group, as the springback fluctuation decreases, the medium elasticity begins to "finely level", making the springback of each section of the bent edge tend to be consistent. The strong elasticity of the third group applies stable pressure to the already uniform bent edge to ensure the consistency of the overall shape. For example, the curvature deviation and perpendicularity error of the bent edges on both sides are controlled to a minimum, eliminating residual springback, ensuring shape consistency, stabilizing the final dimensional accuracy, thereby improving the forming rate of the semi-tube workpiece 5.

[0045] When the semi-tube workpiece 5 enters between multiple sets of first pressure rollers 7, it is guided by multiple guide rollers 17, thereby improving the practicality of the equipment.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A head-end semi-tube forming machine, characterized in that, include: A processing table (1) is fixedly connected to a guide frame (23) on the top of the processing table (1), and a semi-tube processing part (5) is provided above the processing table (1). A layer presser is set on top of the processing table (1) for extruding the semi-tube processing part (5) in stages; A retaining unit is provided on the top of the processing table (1) to reduce the springback of the semi-tube workpiece (5) after being bent by the first and second pressing. Finally, a retaining auxiliary component is placed on top of the processing table (1) to reduce the springback caused by the bending of the semi-tube processing part (5) after the third pressing.

2. The end cap semi-tube forming machine according to claim 1, characterized in that: The layer presser includes a first set of pressing components, a second set of pressing components and a third set of pressing components rotatably connected to the top of the processing table (1). The first set of pressing components consists of a first convex roller (2) and a first concave roller (3). The second set of pressing components consists of a second concave roller (19) and a second convex roller (20). The third set of pressing components consists of a third concave roller (21) and a third convex roller (22).

3. The end cap semi-tube forming machine according to claim 2, characterized in that: The curvature of the first group of pressing components, the second group of pressing components, and the third group of pressing components increases from right to left.

4. The end cap semi-tube forming machine according to claim 3, characterized in that: The holding unit includes two fixed plates (4) fixed on the top of the processing table (1). Two connecting plates (24) are fixedly connected to one side of the fixed plate (4). A fixed frame (11) is fixedly connected to one end of the connecting plate (24). A drive motor (13) is fixedly connected to one side of the fixed frame (11). A rotating frame (10) is fixedly connected to the output end of the drive motor (13). An auxiliary limiting plate (12) is fixedly connected to one end of the rotating frame (10).

5. The end cap semi-tube forming machine according to claim 4, characterized in that: The two fixing plates (4) are respectively disposed between the first concave roller (3) and the second concave roller (19), and between the second concave roller (19) and the third concave roller (21).

6. A head-end semi-tube forming machine according to claim 4, characterized in that: The holding unit also includes a plurality of second pressure rollers (14) rotatably connected to the inner side of the auxiliary limiting plate (12), and the contact position between the auxiliary limiting plate (12) and the semi-tube processing part (5) is provided with a guide slope (15).

7. The end cap semi-tube forming machine according to claim 1, characterized in that: The final retaining auxiliary component is fixedly connected to the rectangular seat (6) on the top of the processing table (1). Multiple sets of first pressure rollers (7) are provided on one side of the rectangular seat (6), and each set of first pressure rollers (7) has multiple components. One end of the first pressure roller (7) is provided with a limiting component for limiting the springback of the semi-tube processing part (5).

8. A head-end semi-tube forming machine according to claim 7, characterized in that: The limiting component includes a plurality of movable slots (8) formed on one side of the rectangular seat (6), each movable slot (8) is slidably connected to a limiting slider (18), and a spring (9) is installed between the limiting slider (18) and the movable slot (8), and a first pressure roller (7) is rotatably connected to one side of each limiting slider (18).

9. A head-end semi-tube forming machine according to claim 8, characterized in that: The elastic coefficient of the spring (9) increases from right to left, and the height of the moving groove (8) increases from right to left.

10. A head-end semi-tube forming machine according to claim 9, characterized in that: The final holding aid also includes a plurality of fixed seats (16) fixedly connected to one side of the rectangular seat (6), and a guide roller (17) is rotatably connected to the inner side of each fixed seat (16).

Images