A centerless tube continuous spiral baffle forming drilling integrated device

Abstract

The application discloses a centerless tube continuous spiral baffle forming drilling integrated device, which comprises a flat plate circular ring unit and a forming system; the flat plate circular ring unit comprises an outer ring plate and an inner sector plate, and a cutting groove is arranged between the outer ring plate and the inner sector plate; the forming system comprises an upper spiral die with a spiral surface, a lower spiral die, a spiral cutting blade with similar spiral parameters of the upper spiral die is arranged on the outer side of the upper spiral die, the outer ring plate is fixed on a cylinder positioning mechanism, the inner sector plate is suspended between the upper spiral die and the lower spiral die, and in the process of pressing the upper spiral die towards the lower spiral die, the spiral cutting blade can firstly contact the cutting groove to cut off the connection between the outer ring plate and the inner sector plate, and then the upper spiral die contacts the inner sector plate which is disconnected with the outer ring plate to make the inner sector plate be extruded between the upper spiral die and the lower spiral die to realize forming, so that the production process is safer and more controllable, and the industrialized continuous production operation of the centerless tube spiral baffle of metal materials is facilitated.

Description

Technical Field

[0001] This application belongs to the field of spiral baffle forming, and particularly relates to an integrated drilling device for continuous spiral baffle forming without a central tube. Background Technology

[0002] Spiral baffle heat exchangers are widely used in industrial production in my country. Their basic design concept is to employ a spiral baffle structure extending along the shell axis in the shell side, allowing the shell-side fluid to flow in a continuous spiral pattern. This enhances shell-side heat transfer, eliminates dead zones in the shell-side fluid flow, reduces shell-side pressure drop, and decreases heat exchanger energy consumption. To facilitate the widespread application of spiral baffle heat exchangers, those skilled in the art have conducted extensive research on improving spiral baffles, resulting in the invention of many different types of spiral baffle heat exchangers.

[0003] For example, the first-generation segmented spiral baffles generally consisted of several quarter-sized fan-shaped flat plates that replaced the spiral curved surface to form an approximate spiral surface. This process was simple and the technology was relatively mature. However, the connection between the fan-shaped plates was a non-smooth, acute-angle transition, which created back pressure on the axially moving fluid. The sudden change of direction when the fluid passed through caused energy loss, which was more severe when the spiral angle was large. When two adjacent fan-shaped plates were spatially connected, corner plates had to be added to fill the gap, which was both labor-intensive and material-intensive, and also increased the resistance to the fluid.

[0004] Therefore, a second-generation continuous spiral baffle with a central tube was developed. This type of heat exchanger features a central tube positioned along the central axis of the continuous spiral baffle, with the baffle forming a continuous spiral structure around it. The central tube is added to the central region of the spiral baffle because the large inclination angle of the central axis made machining the central area difficult. The central tube occupies part of the heat exchange tube space, reducing the heat exchange area and lowering the utilization rate of the shell space, leading to reduced heat exchange efficiency and overall performance degradation. It also has a certain impact on the stress state.

[0005] Subsequently, engineers developed a centerless, continuous spiral baffle plate. This baffle plate features an ideal spiral surface, with the central hole's spiral line approaching a straight line. The shell-side medium flows along the continuous spiral path in a spiral plunger flow pattern, resulting in a stable flow field and uniform temperature distribution. This reduces flow interruptions and leakage issues common in discontinuous spiral baffle plate heat exchangers, lowers shell-side resistance, and improves heat transfer efficiency. The spiral flow path ensures the shell-side medium is continuously subjected to force in the same direction, reducing dead zones and heat exchanger tube vibration. It also reduces scaling on the shell side, extending the heat exchanger's service life. The water film generated by steam condensation flows downwards along the upper surface of the spiral baffle plate, carrying away impurities and reducing shell-side blockage. The centerless, continuous spiral baffle plate heat exchanger offers better heat transfer and flow characteristics, significantly improving heat transfer efficiency, reducing shell-side resistance and dead zones, and lowering scaling rates and vibration. Currently, it boasts the best overall performance among spiral baffle plate heat exchangers.

[0006] The most common method for producing spiral baffles with a central tube is the mold method. Specifically, a circular flat plate of metal (aluminum or steel) is radially notched and placed between upper and lower molds with a spiral surface. The required spiral surface is formed by extrusion. The lower mold has a guide rod in the middle. In actual processing, the operator needs to fit the flat ring into the guide rod of the lower mold, adjust the notch position, and then press down the upper mold. The resulting spiral blades inevitably have a large central hole, making it impossible to form the ideal spiral surface. Removing the guide rod makes it impossible to stably position the flat ring on the lower mold of the spiral surface, thus failing to achieve the ideal spiral baffle structure. Currently, continuous spiral baffles can be manufactured by injection molding, but this requires subsequent mold removal and hole machining. Furthermore, metal materials generally have higher strength and durability than injection molded materials, and their high plasticity allows for complex welding processes, making them suitable for large heat exchangers. However, industrial continuous production is difficult. Therefore, existing technologies require further improvement and enhancement. Summary of the Invention

[0007] The present invention provides an integrated device for forming and drilling continuous spiral baffles without a central tube, which at least solves or alleviates one or more technical problems in the prior art, or at least provides a beneficial alternative.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A central tubeless continuous spiral baffle forming and drilling integrated device includes a flat ring unit and a forming system;

[0010] The flat ring unit includes an outer ring plate and an inner sector plate, with a groove provided between the outer ring plate and the inner sector plate;

[0011] The forming system includes an upper spiral die and a lower spiral die with spiral curved surfaces. The spiral curved surfaces of the upper and lower spiral dies match each other. A cylindrical positioning mechanism is provided on the outside of the lower spiral die. A spiral cutting edge with similar spiral parameters to the upper spiral die is provided on the outside of the upper spiral die. An outer ring plate is fixed by the cylindrical positioning mechanism. The inner fan-shaped plate is suspended between the upper and lower spiral dies. During the process of the upper spiral die pressing down towards the lower spiral die, the spiral cutting edge can first contact the cutting groove to cut off the connection between the outer ring plate and the inner fan-shaped plate. The upper spiral die then contacts the inner fan-shaped plate, which is disconnected from the outer ring plate, and squeezes it between the upper and lower spiral dies to achieve forming.

[0012] The integrated device for forming and drilling of a centerless continuous spiral baffle plate disclosed in this application, by setting up a flat circular ring unit, allows the outer ring plate to be fixed in a cylindrical positioning mechanism during the centerless continuous spiral baffle plate forming operation. At this time, the inner fan-shaped plate is suspended between the upper and lower spiral dies. A spiral cutting edge with similar spiral parameters (i.e., only different spiral size) to the upper spiral die is set on the outer wall of the upper spiral die. During the downward pressing process of the upper spiral die, the spiral cutting edge first contacts the cutting groove. During the downward pressing process of the upper spiral die, the spiral cutting edge first cuts off a part of the connection between the outer ring plate and the inner fan-shaped plate. Then, the upper spiral die abuts against the cut part of the inner fan-shaped plate to press it down, while the inner ring plate that is not cut off remains connected to the outer ring plate. During the forming process, the inner fan-shaped plate can always maintain a stable posture without shifting, thereby achieving precise shape control of the centerless spiral baffle plate forming, improving the dimensional accuracy of the workpiece and the consistency of the geometric shape during continuous production, making the production process safer and more controllable, and facilitating the industrial continuous production of centerless spiral baffle plates of metal materials.

[0013] In a preferred embodiment, the cylindrical positioning mechanism includes a cylinder, the inner wall of which is provided with a first magnetic ring. The height of the plane where the first magnetic ring is located coincides with the plane where the highest point of the lower spiral mold is located. The ring width of the first magnetic ring is the same as the ring width of the outer ring plate. The first magnetic ring can generate magnetic force to attract and fix the outer ring plate.

[0014] During the spiral forming process of the inner sector plate, the first magnetic ring firmly adsorbs and fixes the outer ring plate. In this way, during the forming process of the inner sector plate, the inner sector plate will not only be subjected to the pressure of the upper spiral die but also the tension of the outer ring plate. Forming under pressure and tension, and applying tension and pressure at the same time to form the spiral baffle plate is faster and can be extruded in one step.

[0015] In a preferred embodiment, the upper spiral mold is provided with a second magnetic ring. When the inner sector plate is completely pressed between the upper spiral mold and the lower spiral mold, the second magnetic ring abuts against the outer ring plate. At the same time, the magnetic force of the first magnetic ring disappears and the second magnetic ring generates magnetic force to attract the cut outer ring plate.

[0016] In a preferred embodiment, the helical surface of the lower helical die has multiple through holes. The lower helical die can generate magnetic force to attract the formed inner sector plate. The lower helical die is connected to a power system, which can drive the lower helical die to move linearly to bring the formed inner sector plate below the drilling system. This achieves continuous production operation.

[0017] In a preferred embodiment, the drilling system includes an upper drilling die, which has the same helical surface as the upper spiral die. The helical surface of the upper drilling die is provided with multiple protruding guide posts, the positions of which correspond to the through holes.

[0018] In a preferred implementation, the guide post is stepped and has a chamfer at its end.

[0019] In a preferred embodiment, the lower spiral die is provided with a positioning post, and the upper spiral die and the upper drilling die are provided with positioning sleeves on both sides. The positioning post and the positioning sleeve cooperate to achieve positioning.

[0020] In a preferred embodiment, the system further includes a base, a molding system, a drilling system, and a power system mounted on the base. The base is equipped with a hydraulic system and an electrical control system. The hydraulic system is connected to the molding system and the drilling system to realize the lifting and lowering of the upper spiral mold and the upper drilling mold. The electrical control system is electrically connected to the first magnetic ring, the second magnetic ring, and the lower spiral mold to control the generation and elimination of magnetic force.

[0021] In a preferred embodiment, the power system includes a lead screw and a slide that can move linearly on the lead screw. The lower helical die and the cylindrical positioning mechanism are disposed on the slide. The base is provided with a position sensor. The electronic control system receives signals from the position sensor to control the start and stop of the power system.

[0022] In a preferred implementation, the groove and the notch of the inner sector plate are formed by laser cutting. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and, together with their description, serve to explain this application and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 A schematic structural diagram of one embodiment of the integrated drilling and forming device for continuous spiral baffles without a central tube according to this application is shown.

[0025] Figure 2 A schematic three-dimensional structural diagram of one embodiment of the flat annular unit of this application is shown;

[0026] Figure 3A schematic structural diagram of one embodiment of the cylindrical positioning mechanism of this application is shown;

[0027] Figure 4 A schematic three-dimensional structural diagram of one embodiment of the spiral mold of this application is shown;

[0028] Figure 5 A schematic three-dimensional structural diagram of one embodiment of the rotating hole upper mold of this application is shown;

[0029] Label Explanation:

[0030] 1- Flat ring unit; 10- Outer ring plate; 11- Inner sector plate; 12- Groove; 2- Upper spiral die; 20- Spiral cutting blade; 21- Positioning sleeve; 3- Lower spiral die; 30- Through hole; 31- Positioning post; 32- Second magnetic ring; 4- Cylinder positioning mechanism; 40- Cylinder; 41- First magnetic ring; 5- Power system; 50- Slide; 51- Lead screw; 6- Drilling system; 60- Upper drilling die; 61- Guide post. Detailed Implementation

[0031] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit and scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0032] The present invention will now be described with reference to the accompanying drawings.

[0033] The specific solution adopted is as follows:

[0034] like Figure 1-5 As shown, the present invention provides an integrated device for forming and drilling a continuous spiral baffle plate without a central tube, comprising a flat ring unit 1 and a forming system;

[0035] The flat ring unit 1 includes an outer ring plate 10 and an inner sector plate 11, with a groove 12 provided between the outer ring plate 10 and the inner sector plate 11;

[0036] The forming system includes an upper spiral mold 2 and a lower spiral mold 3 with spiral curved surfaces. The spiral curved surfaces of the upper spiral mold 2 and the lower spiral mold 3 match each other. A cylindrical positioning mechanism 4 is provided on the outside of the lower spiral mold 3. A spiral cutting blade 20 with similar spiral parameters to the upper spiral mold 2 is provided on the outside of the upper spiral mold 2. An outer ring plate 10 is fixed by the cylindrical positioning mechanism 4. An inner fan-shaped plate 11 is suspended between the upper spiral mold 2 and the lower spiral mold 3. During the process of the upper spiral mold 2 pressing down toward the lower spiral mold 3, the spiral cutting blade 20 can first contact the cutting groove 12 to cut off the connection between the outer ring plate 10 and the inner fan-shaped plate 11. The upper spiral mold 2 then contacts the inner fan-shaped plate 11, which is disconnected from the outer ring plate 10, so that it is squeezed between the upper spiral mold 2 and the lower spiral mold 3 to achieve forming.

[0037] The integrated device for forming and rotating holes of a centerless continuous spiral baffle plate in this application includes a flat circular ring unit 1. The inner fan-shaped plate 11 of the flat circular ring unit 1 has the same diameter as the upper spiral mold 2 and the lower spiral mold 3, serving as the base plate for forming the spiral plate. The outer ring plate 10 of the flat circular ring unit 1 has a larger diameter than the inner fan-shaped plate 11. To ensure that the base plate can be stably placed on the lower spiral mold 3, a positioning plate is provided at the junction of the two. During the centerless continuous spiral baffle plate forming operation, the outer ring plate 10 is fixed in place by the positioning mechanism 4 of the cylinder 40. At this time, the inner fan-shaped plate 11 is suspended between the upper spiral mold 2 and the lower spiral mold 3. A spiral cutting edge 20 with similar spiral parameters (i.e., only different spiral size) is provided on the outer wall of the upper spiral mold 2. During the pressing process of the upper spiral mold 2, the spiral cutting edge 20 contacts the cutting edge 12 first. The cutting edge 12 and the notch of the inner fan-shaped plate 11 can be formed by laser cutting device.

[0038] The groove 12 can introduce a preset cutting path on the flat annular unit 1, making the spiral cutting blade 20 easier to guide and control, reducing material deformation and resistance during cutting, and making the cutting process smoother and more efficient. Due to the special shape of the spiral curved surface of the upper and lower spiral dies 3, there is a contact time difference between the upper spiral die 2 and the inner sector plate 11 at different height positions during the downward pressing process. That is, the higher point of the upper spiral die 2 contacts the inner sector plate 11 first, and the lower point contacts the inner sector plate 11 later. Similarly, the spiral cutting blade 20 also works in this way, with the higher point contacting the groove 12 first and the lower point contacting the groove 12 later. In this way, during the pressing process of the upper spiral mold 2, the spiral cutting blade 20 first cuts off a part of the connection between the outer ring plate 10 and the inner fan-shaped plate 11. Then, the upper spiral mold 2 abuts against the cut part of the inner fan-shaped plate 11 to press it down, while the inner ring plate that is not cut off remains connected to the outer ring plate 10. During the forming process, the inner fan-shaped plate 11 can always maintain a stable posture without shifting, thereby achieving precise shape control of the forming of the centerless spiral baffle, improving the dimensional accuracy of the workpiece and the consistency of the geometry during continuous production, making the production process safer and more controllable, and facilitating the industrial continuous production of centerless spiral baffles of metal materials.

[0039] As a preferred embodiment of this application, see [link to application]. Figure 3 The positioning mechanism 4 of the cylinder 40 includes a cylinder 40. The inner wall of the cylinder 40 is provided with a first magnetic ring 41. The height of the plane where the first magnetic ring 41 is located coincides with the plane where the highest point of the lower spiral mold 3 is located. The ring width of the first magnetic ring 41 is the same as the ring width of the outer ring plate 10. The first magnetic ring 41 can generate magnetic force to attract and fix the outer ring plate 10. The principle of the first magnetic ring 41 generating magnetic force is the existing principle of generating magnetic force by electricity. Those skilled in the art can understand that during the spiral forming process of the inner sector plate 11, the first magnetic ring needs to firmly attract and fix the outer ring plate 10. In this way, during the forming process of the inner sector plate 11, the inner sector plate 11 will not only receive pressure but also tension from the outer ring plate 10. Forming under pressure and tension, and applying tension and pressure simultaneously for spiral baffle forming can bring the following advantages:

[0040] Applying both tension and pressure simultaneously can expand the forming capacity of the sheet metal. Specifically, tension allows the inner sector plate 11 to stretch and extend during the forming process, helping to create more complex curves and details. Pressure, on the other hand, compresses and plastically deforms the sheet metal, making it easier to change shape and adapt to complex forming requirements. By combining tension and pressure, the deformation of the inner sector plate 11 can be better controlled.

[0041] Simultaneous application of tension and pressure can improve forming efficiency: the application of tension and pressure can achieve more complex shapes and details in a single forming process, reduce the number of forming steps and processes, save time and costs, and at the same time ensure that the material is not excessively deformed and stress concentrated during the forming process, preventing stress concentration in the inner sector plate 11 after cold pressing and the resulting deformation problem. Existing spiral baffles with a central tube require the spiral baffle to be flipped over and placed for a second pressing after the spiral plate is formed in the inner sector plate 11 of the flat plate. The forming machine of this application can be extruded and formed in one step, and ensures the quality and stability of the forming.

[0042] As a preferred embodiment of this application, see [link to application]. Figure 4 The upper spiral mold 2 is equipped with a second magnetic ring 32. When the inner sector plate 11 is completely pressed between the upper spiral mold 2 and the lower spiral mold 3, the second magnetic ring 32 abuts against the outer ring plate 10. The magnetic force of the first magnetic ring 41 disappears, and the second magnetic ring generates magnetic force to attract the cut outer ring plate 10. The principle of the second magnetic ring generating magnetic force is also to generate magnetism by passing electricity. The main purpose is to attract the outer ring plate 10 and remove it from the cylinder 40 positioning mechanism 4, so as to facilitate subsequent continuous operation.

[0043] As a preferred embodiment of this application, see [link to application]. Figure 3 The lower spiral mold 3 has multiple through holes 30 on its spiral curved surface. The lower spiral mold 3 can generate magnetic force to attract the formed inner fan-shaped plate 11. The lower spiral mold 3 generates magnetic force by applying electricity and demagnetizing when the electricity is turned off. The lower spiral mold 3 is connected to the power system 5. The power system 5 can drive the lower spiral mold 3 to move linearly to place the formed inner fan-shaped plate 11 below the drilling system 6. Specifically, to achieve continuous forming and drilling of the spiral baffle, after the inner fan-shaped plate 11 is formed into a spiral baffle without a central tube, the lower spiral mold 3 generates magnetic force to firmly attract the spiral baffle, and then transports it to the system carrying the lower spiral mold 3 to move it below the drilling system 6. See details below. Figure 1 The power system 5 includes a lead screw 51 and a slide 50 that can move linearly on the lead screw 51. The lower helical mold 3 and the cylinder 40 positioning mechanism 4 are located on the slide 50. The base is equipped with a position sensor (not shown in the figure). The electronic control system receives the signal from the position sensor to control the start and stop of the power system 5.

[0044] For details on the implementation of drilling system 6, please refer to [link / reference]. Figure 1 and 5The drilling system 6 includes an upper drilling die 60, which has the same helical surface as the upper spiral die 2. The helical surface of the upper drilling die 60 is provided with multiple protruding guide posts 61, the positions of which correspond to the through holes 30. Once the guide posts 61 are fully inserted into the through holes 30, the drilling operation of the centerless spiral baffle is completed. In this embodiment, the guide posts 61 are stepped with chamfered ends, which effectively reduces friction between the guide post 61 punch and the centerless spiral baffle, thereby reducing cutting force and cutting temperature, and preventing the guide posts 61 from overheating and breaking. The lower spiral die 3 magnetically fixes the spiral baffle, providing additional support and stability, reducing the squeezing and torsional forces on the plate material during the punching process.

[0045] To ensure accurate positioning between the upper and lower helical molds 3, please refer to... Figure 1 In this embodiment, the lower spiral mold 3 is provided with a positioning post 31, and the upper spiral mold 2 and the upper drilling mold 60 are provided with positioning sleeves 21 on both sides. The positioning post 31 and the positioning sleeve 21 cooperate to achieve positioning.

[0046] To achieve intelligent control and continuous production, this application also includes a base, a forming system, a drilling system 6, and a power system 5 installed on the base. The base is equipped with a hydraulic system and an electrical control system. The hydraulic system is connected to the forming system and the drilling system 6 to realize the lifting and lowering of the upper spiral mold 2 and the upper drilling mold 60. The electrical control system is electrically connected to the first magnetic ring, the second magnetic ring, and the lower spiral mold 3 to control the generation and elimination of magnetic force. The electrical control system is not shown in the figure and is prior art, which will be understood by those skilled in the art.

[0047] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0048] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In this invention, unless otherwise expressly specified and limited, the first feature being "upper" or "lower" than the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two connected entities do not establish a connection relationship through an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0050] In this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0051] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A central tube-less continuous spiral baffle forming and drilling integrated device, characterized in that, Includes flat ring units and molding systems; The flat ring unit includes an outer ring plate and an inner sector plate, with a groove provided between the outer ring plate and the inner sector plate; The forming system includes an upper spiral die and a lower spiral die with spiral curved surfaces. The spiral curved surfaces of the upper spiral die and the lower spiral die match each other. A cylindrical positioning mechanism is provided on the outside of the lower spiral die. A spiral cutting edge with similar spiral parameters to the upper spiral die is provided on the outside of the upper spiral die. An outer ring plate is fixed by the cylindrical positioning mechanism. The inner fan-shaped plate is suspended between the upper spiral die and the lower spiral die. During the process of the upper spiral die pressing down towards the lower spiral die, the spiral cutting edge can first contact the cutting groove to cut off the connection between the outer ring plate and the inner fan-shaped plate. The upper spiral die then contacts the inner fan-shaped plate, which is disconnected from the outer ring plate, and squeezes it between the upper spiral die and the lower spiral die to achieve forming. The cylindrical positioning mechanism includes a cylinder, and a first magnetic ring is provided on the inner wall of the cylinder. The height of the plane where the first magnetic ring is located coincides with the plane where the highest point of the lower spiral mold is located. The ring width of the first magnetic ring is the same as the ring width of the outer ring plate. The first magnetic ring can generate magnetic force to attract and fix the outer ring plate. The upper spiral die is provided with a second magnetic ring. When the inner sector plate is completely pressed between the upper spiral die and the lower spiral die, the second magnetic ring abuts against the outer ring plate. At the same time, the magnetic force of the first magnetic ring disappears and the second magnetic ring generates a magnetic force to attract the cut outer ring plate. The spiral surface of the lower spiral die is provided with multiple through holes. The lower spiral die can generate magnetic force to attract the formed inner fan-shaped plate. The lower spiral die is connected to a power system. The power system can drive the lower spiral die to move linearly to bring the formed inner fan-shaped plate to the bottom of the drilling system. During the downward pressing process, the spiral cutting edge first contacts the groove, cutting off a portion of the connection between the outer ring plate and the inner fan-shaped plate. Then, the upper spiral die presses down against the cut portion of the inner fan-shaped plate, while the uncut inner ring plate remains connected to the outer ring plate. During the forming process, the inner fan-shaped plate can maintain a stable posture without shifting, thus achieving precise shape control for the forming of the centerless spiral baffle plate. The groove can introduce a preset cutting path on the flat ring unit, making the spiral cutting edge easier to guide and control.

2. The integrated drilling and forming device for a continuous spiral baffle plate without a central tube according to claim 1, characterized in that, The drilling system includes an upper drilling die, which has the same helical surface as the upper spiral die. The helical surface of the upper drilling die is provided with multiple protruding guide posts, the positions of which correspond to the through holes.

3. The integrated drilling and forming device for a continuous spiral baffle plate without a central tube according to claim 2, characterized in that, The guide post is stepped and has a chamfer at the end.

4. The integrated drilling and forming device for a continuous spiral baffle plate without a central tube according to claim 3, characterized in that, The lower spiral die is provided with a positioning post, and the upper spiral die and the upper drilling die are provided with positioning sleeves on both sides. The positioning post and the positioning sleeve cooperate to achieve positioning.

5. The integrated drilling and forming device for a continuous spiral baffle plate without a central tube according to claim 1, characterized in that, It also includes a base, a molding system, a drilling system, and a power system installed on the base. The base is equipped with a hydraulic system and an electrical control system. The hydraulic system is connected to the molding system and the drilling system to realize the lifting and lowering of the upper spiral mold and the upper drilling mold. The electrical control system is electrically connected to the first magnetic ring, the second magnetic ring, and the lower spiral mold to control the generation and elimination of magnetic force.

6. The integrated drilling and forming device for a continuous spiral baffle plate without a central tube according to claim 5, characterized in that, The power system includes a lead screw and a slide that can move linearly on the lead screw. The lower helical die and the cylindrical positioning mechanism are located on the slide. The base is equipped with a position sensor. The electronic control system receives signals from the position sensor to control the start and stop of the power system.

7. The integrated drilling and forming device for a continuous spiral baffle plate without a central tube according to claim 1, characterized in that, The groove and the notch in the inner sector plate are formed by laser cutting.

Images