Parallel internal spiral thread round pipe and its processing and manufacturing device

Abstract

The application discloses a parallel internal spiral thread round pipe and a processing and manufacturing device thereof, relates to the technical field of heat dissipation round pipe processing, and first adopts a production mode of first groove pressing and then bending into a pipe, integrates groove pressing, roller pressing, ring cutting and reducing diameter procedures by means of an integrated frame, and continuously transmits metal narrow strips into a groove pressing part when running, and after switching a processing mode, is oriented and pressed to separate from a work station, and a double-mirror image symmetrical deviation adjusting pressing position is synchronously tilted by being deflected by a cam follower driven by a main shaft, is supported by a double-point support, forms a four-point stress structure, realizes dynamic continuous groove cutting, simultaneously, groove depth is closed loop corrected by real-time feedback of oil pressure data of a hydraulic pressure sensing assembly, a gravity pendulum provides passive centering and anti-shaking, groove cutting action is matched with production line transmission speed, continuous processing can be completed without reducing the production line speed, production capacity and groove forming consistency are greatly improved, and the defective product rate is reduced.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation circular tube processing technology, specifically to a parallel internal spiral threaded circular tube and its processing and preparation apparatus. Background Technology

[0002] The manufacturing process of a heat dissipation tube is explained as follows: it is based on aluminum sheets and is obtained through pretreatment, bending, welding, and diameter reduction. Considering the internal fluid flow state, corresponding flow channels are created on the inner wall of the tube. The purpose is to improve heat transfer efficiency by changing the fluid state. Further details regarding the processing of the inner wall flow channels are provided below: 1. Conventionally, the inner wall of the semi-finished round tube (i.e., the round tube after the diameter reduction process) is tapped. However, considering the length and inner diameter of the tube, the processing difficulty and cost are relatively large. Therefore, this solution adopts the method of completing the processing of the inner wall flow channel before bending, which is essentially the same as the roll forming process. 2. Since the transfer speed of aluminum sheet / tube remains relatively balanced between each process, considering both the continuity of the process and the stability of the flow channel during the round tube processing, while ensuring the basic action of opening the flow channel during the continuous transfer of aluminum sheet, the overall production speed of the production line should not be affected. Secondly, the stability of the action when opening the flow channel should be ensured to avoid abnormal shutdowns caused by disordered production line action parameters, and to ensure that the inner wall flow channel of the formed round tube is in a relatively good state.

[0003] Based on the above, a technical solution is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a parallel internal spiral threaded round tube and its processing and preparation apparatus to solve the above-mentioned technical problems.

[0005] The objective of this invention can be achieved through the following technical solution: a processing and preparation apparatus for parallel internal spiral threaded round tubes, wherein, An integrated frame comprising a grooving section, a rolling section, a circumferential cutting section, and a diameter reduction section, executed sequentially. The grooving section includes a driving fixture and a grooving plate. The outer surface of the grooving plate has multiple sets of parallel cutting teeth, and the grooving plate is arranged in a ring array along the center point of the output position of the driving fixture. The pressure groove plate is configured with directional pressure position and two bias pressure adjustment positions along the annular distribution direction, wherein the bias pressure adjustment positions are mirror-symmetrically distributed along the center line of their center point; Furthermore, a directional bracket is provided in the area between the two biased pressure adjustment positions, and a contact guide wheel is provided at both ends of the directional bracket; The grooving action is completed by the two directional bias positions. The directional bias positions are driven by the tooling table to change the grooving parameters in the grooving action. The directional bracket is used to stabilize the raw material between the two directional bias positions.

[0006] Further configuration: The drive fixture includes a base and a drive motor. An actuating spindle is installed at the output position of the drive motor. An directional adjustment block corresponding to the directional pressing position, a directional bracket corresponding to the biased pressure adjustment position, and a directional support corresponding to the arc frame are installed on the actuating spindle. The directional pressing position moves directionally along the diameter direction of the output shaft of the drive motor through the directional adjustment block, and is used to change the grooving depth of the directional pressing position in the grooving action.

[0007] The configuration is further defined as follows: a wedge slide with a corresponding directional bracket is installed in the bias adjustment position, and a wedge transmission mode is formed between the directional bracket and the wedge slide.

[0008] The configuration is further defined as follows: the inclined wedges in the inclined wedge transmission method all point towards the arc-shaped frame, and the inclined surface position and the gap position between the directional bracket and the inclined wedge slide are respectively provided with limit slides and hydraulic pressure sensing components. The hydraulic pressure sensing components include a high-strength hydraulic elastic sleeve, a detection unit and a pressure regulating unit.

[0009] Further configuration: the length direction of the directional bracket and the directional support is parallel to the diameter direction of the main shaft, the center point of the arc frame is parallel to the directional support, and a gravity pendulum is installed on the lower surface of the arc frame along the center point in a fixed direction.

[0010] Further configuration: During operation, narrow metal sheets are sequentially fed into the grooving section, rolling section, circumferential cutting section, and diameter reduction section. The grooving action of parallel internal spiral threads is completed in the grooving section, specifically including the following modes: Mode 1: Adjust the setting angle of the grooving plate so that the directional pressing position is located in the lower area, and drive the grooving plate to deflect at a small angle to change the grooving depth by driving the motor; Mode 2: The setting angle of the pressure plate is readjusted, the directional pressure position is located in the uppermost area and does not participate in the grooving action, and the two bias pressure adjustment positions participate in the grooving action. The pressure plate is deflected at a small angle by the drive motor, and the wedge slide produces a linear movement that is inclined to the diameter direction of the main shaft. The hydraulic pressure sensing components in the two bias pressure adjustment positions are used as the detection feedback method.

[0011] The present invention has the following beneficial effects: 1. Firstly, the conversion between the spindle deflection motion and the grooving sheet feed motion is achieved through the wedge transmission structure, making the motion vector of the grooving motion match the continuous transmission motion vector of the metal narrow sheet. This breaks the cycle limitation of traditional intermittent grooving, enabling continuous dynamic grooving without reducing the production line speed, effectively improving the continuity of production and overall capacity. At the same time, the structure design of symmetrical force application with dual-biased pressure adjustment position, combined with the dual-point support structure of the directional bracket, can offset the lateral force during the grooving process, avoiding processing defects such as pulling, offsetting, and bending of the metal narrow sheet, and ensuring the stability of the processing process. 2. Secondly, a closed-loop feedback adjustment logic for grooving parameters is constructed through a hydraulic pressure sensing component. This logic can respond in real time to external disturbances such as sheet thickness fluctuations and equipment vibrations, and dynamically correct process parameters such as grooving depth online. This ensures the consistency of groove forming parameters without requiring machine downtime for adjustment. At the same time, relying on the passive centering characteristics of the gravity pendulum, it can automatically counteract the inertial shaking caused by spindle deflection and equipment operation, improve the stability of the mechanism under high-speed operation, effectively prevent sheet arching and deformation, ensure the flatness of the groove forming and the surface quality of the product, and significantly reduce the probability of defective products. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0013] Figure 1 This is a schematic diagram of the assembly of a parallel internal spiral threaded round tube processing and preparation device proposed in this invention; Figure 2 For the present invention Figure 1 Schematic diagram of the intermediate pressure groove section; Figure 3 For the present invention Figure 2 A schematic diagram of the structure of the drive fixture and the pressure plate; Figure 4 For the present invention Figure 3 Assembly diagram of the medium-pressure slot plate; Figure 5 For the present invention Figure 4 The front view in the middle; Figure 6 For the present invention Figure 5 Schematic diagram of the force direction after deflection; Figure 7 This is a schematic diagram of the structure of a parallel internal spiral threaded round tube and its raw material sheet proposed in this invention.

[0014] In the diagram: 1. Integrated frame; 2. Drive tooling table; 3. Pressure groove plate; 301. Parallel cutting teeth; 302. Oriented pressure position; 303. Offset pressure adjustment position; 4. Inclined wedge slide; 5. Oriented bracket; 6. Arc frame; 7. Oriented support; 8. Hydraulic pressure sensing component; 9. Motion spindle; 10. Gravity pendulum. Detailed Implementation

[0015] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Example 1: A brief explanation of the round tube forming process: Conventionally, it is based on aluminum sheets and obtained through a series of processes such as grooving, bending, and welding. However, considering the flow of the heat transfer medium on the inner wall, water grooves are often set on the inner wall. The conventional method of forming the tube first and then grooving is abandoned due to process issues. In the process of grooving first and then bending into tubes, there is a stable interference problem between the action mode of the grooving structure and the sheet material transmission process. For example, the pressing-holding-lifting action cycle cannot be synchronized with the strip material's travel speed, which can easily cause local stretching of the strip material, resulting in uneven groove depth, or strip material accumulation, causing equipment jamming. In actual production, to avoid this contradiction, it is usually necessary to reduce the production line operating speed and sacrifice overall capacity. The following technical solution is proposed to address this issue: Reference Figure 7 The present invention describes a parallel internal spiral threaded round tube. The metal narrow strip in the initial state is grooved to form a groove on its surface that meets the process requirements. Finally, it is bent and welded into a tube. And reference Figures 1-6 In a processing and preparation device for a parallel internal spiral threaded round tube, the key structure is the pressure plate 3, but the focus is on the area of ​​its action mode. Mode 1 is the simplest operation mode, which only requires adjusting the distance between the directional pressure position 302 and the metal narrow plate to adjust its cutting depth. The focus of this invention is the action form in mode two. The action principle is the same as that in mode one, but the difference is that the action form of the biased pressure adjustment position 303 relative to the action main axis 9 is manifested as a symmetrical arrangement of the two and a non-radial linear movement process. An arc frame 6 is also added to stabilize the stability of the sheet during the grooving process without interfering with the sheet transmission.

[0017] Example 2: This example is a technical introduction to Example 1, focusing on the constituent parts and operation process of the relevant technical features: This invention is mainly reflected in the inner wall grooving process. Therefore, in this embodiment, the grooving part of the processing and preparation device is mounted with the main shaft 9 as the core mounting base. The main shaft 9 is coaxially mounted on the output end of the drive motor of the drive tooling table 2. Along the radial direction of the main shaft 9, the directional bracket 5, the arc-shaped bracket 6, and the directional support 7 are fixedly mounted in sequence. The length direction of the three is parallel to the diameter direction of the main shaft 9. (Refer to...) Figure 5 The best way is for them to be evenly distributed at 120° along the circumference, which specifically forms an equilateral triangle structure. Two pressure plates 3 at the two biased pressure adjustment positions 303 are slidably mounted on both ends of the directional bracket 5 via inclined wedge slides 4. The inclined surface of the inclined wedge slides 4 is set towards the center point of the arc-shaped frame 6, so that the directional bracket 5 and the inclined wedge slides 4 form an inclined wedge transmission pair pointing towards the center. It should be explained that in mode one, the relative height of the directional pressure position 302 can be directly adjusted to change its grooving depth. The key is the adjustment process of the two biased pressure adjustment positions 303, which is referred to Figure 6 The actual radial line in the diagram represents the diameter direction of the main shaft 9, while the working direction line represents the deviation direction line of the bias adjustment position 303 relative to the main shaft 9 after its position is adjusted. A limiting slide bar is embedded at the inclined surface where the wedge slide 4 and the directional bracket 5 meet. A hydraulic pressure sensing component 8 is installed at the fitting gap. A high-strength hydraulic elastic sleeve of the hydraulic pressure sensing component 8 fills the fitting gap. The detection unit and the pressure regulating unit are respectively connected to the control system signal of the device. Figure 5 To supplement this example, the hydraulic pressure sensing component 8 is essentially an elastic sleeve filled with hydraulic oil. On the one hand, it passively senses the hydraulic changes of the inclined wedge slide 4 and the directional bracket 5 when they move linearly. On the other hand, it can actively change the internal hydraulic pressure and thus actively change the linear movement process between the inclined wedge slide 4 and the directional bracket 5. The center point of the arc frame 6 and the center point of the directional support 7 are on the same radial straight line. The gravity pendulum 10 is fixedly installed on the lower surface of the arc frame 6, and the center line of gravity of the gravity pendulum 10 coincides with the vertical center line of the motion spindle 9. Contact guide wheels are rotatably installed at both ends of the arc frame 6. The outer circular surfaces of the two contact guide wheels are in contact with the unmachined surfaces of the metal narrow strip, and the axis of the guide wheels is perpendicular to the transmission direction of the metal narrow strip. As mentioned above and Figure 5 This can be understood as follows: Mode 1 is the conventional action form, but this invention specifically optimizes it into Mode 2, which is explained point by point as follows: Pre-adjustment stage: The control system first drives the motor to deflect the main spindle 9, causing the directional pressing position 302 to rotate to the uppermost area of ​​the main spindle 9. At this time, the pressing plate 3 of the directional pressing position 302 is completely separated from the metal narrow plate and does not participate in the grooving action; at the same time, the two biasing pressure adjustment positions 303 rotate synchronously to the upper part of the processing side of the metal narrow plate, completing the station switching. By using a single-station detachment method, the grooving action is transformed from single-point pressure application to double-point symmetrical pressure application, avoiding the force deviation of the narrow metal sheet when grooving at a single point, and structurally eliminating the problem of groove skewing caused by unilateral force on the sheet. During the grooving feeding stage, the narrow metal sheet is uniformly transported into the grooving section along the production line. The contact guide wheels at both ends of the directional support 7 first come into contact with the lower surface of the narrow metal sheet, forming a double-point support for the sheet. Then, the drive motor drives the main shaft 9 to make a small-angle directional deflection. The directional bracket 5 deflects synchronously with the main shaft. Through the wedge transmission pair, it pushes the two wedge slides 4 to move synchronously and linearly in the inclined direction, driving the two grooving plates 3 of the deflection adjustment position 303 to feed synchronously towards the surface of the narrow metal sheet. The parallel cutting teeth 301 press into the surface of the sheet to form a parallel inner spiral groove. It should be added that the symmetrical feed of the dual-biased pressure adjustment position 303 ensures that the processing surface of the narrow metal sheet is subjected to symmetrical and balanced pressure. Combined with the dual-point support of the lower directional bracket 7, this forms a stable four-point force-bearing structure of "upper dual-point pressure + lower dual-point support," completely offsetting the lateral force during the grooving process. This prevents the sheet from being pulled or shifted during transport, ensuring the consistency of the groove depth and spacing. Figure 5 The position shown is the initial position, indicating that the directional support 7 is set parallel to the direction of gravity. Then, the two bias adjustment positions 303 are completely symmetrical structures, which can better share the lateral force during the grooving process. Secondly, the wedge drive method converts the deflection motion of the main shaft into the tilting feed motion of the grooving plate, so that the feed speed of the grooving plate and the transmission speed of the sheet form a vector match. The grooving action does not require the intermittent cycle of "pressing down - holding pressure - lifting up". It can follow the continuous transmission of the sheet to complete the dynamic grooving without reducing the production line operating speed. This solves the speed matching contradiction between traditional intermittent grooving and continuous transmission, and greatly improves the overall production capacity. The key aspects of this invention are: the detection method during the grooving feeding process; the high-strength hydraulic elastic sleeve of the hydraulic pressure sensing component 8 bears the reaction force of the wedge slide 4 in real time; the detection unit collects hydraulic pressure data and transmits it to the control system; when the groove depth deviates, the hydraulic pressure data changes synchronously; the control system drives the pressure regulating unit to adjust the support force of the hydraulic elastic sleeve according to the feedback signal, and at the same time fine-tunes the deflection angle of the main shaft 9; the feed amount of the grooving plate is corrected through the wedge transmission pair, and the grooving depth is dynamically adjusted. This mainly involves trigonometric function calculations, which can be referred to... Figure 6 Location display within; Its key objective is to form a closed-loop feedback control logic of "pressure detection - signal feedback - parameter correction", which can correct the grooving parameters in real time without stopping the machine, eliminate the impact of sheet thickness fluctuations, equipment vibration and other factors on the grooving quality, ensure the consistency of grooving parameters in mass production and reduce the defect rate.

[0018] Throughout the grooving process, the arc frame 6 rotates synchronously with the small-angle deflection of the overall grooving plate 3. However, since the gravity pendulum 10 and the arc frame 6 are fixedly connected, the lower gravity pendulum 10 is always subjected to gravity and maintains a vertically downward posture, providing a constant centering torque for the arc frame 6 and counteracting the inertial sway caused by the spindle deflection. At the same time, the arc surface of the arc frame 6 forms a non-contact limiting with the upper surface of the metal narrow plate, preventing the sheet from arching upwards during the grooving process. The passive centering function of the gravity pendulum can achieve dynamic anti-shaking during the grooving process without additional drive, simplifying the device structure while improving the stability of the action at high speed; the non-contact limiting of the arc frame not only avoids scratching the sheet surface, but also effectively limits the processing deformation of the sheet, ensuring the flatness of the groove. In addition to the above, the main technical content of this invention focuses on the following: 1. Abandoning the traditional single-point pressing structure, it adopts two mirror-symmetrical offset pressing positions 303 along the main axis centerline. The force directions of the two pressing plates 3 are symmetrically angled, and their radial components can completely cancel each other out, retaining only the positive pressing force perpendicular to the sheet surface. This eliminates the sheet offset, pulling, and bending problems caused by unilateral pressure from the mechanical root. When switching to... Figure 6 In the asymmetrical mode, the contact pressure of the pressure groove plate 3 on the sheet can be controlled autonomously in the pressure adjustment position 303 on both sides. The purpose is to change the lateral pressure on both sides while maintaining the cutting depth. 2. The bias adjustment position 303 forms a wedge transmission pair with the wedge slide 4 and the directional bracket 5. The inclination angle of the wedge surface is designed to match the production line speed, which can convert the small angular displacement of the main shaft 9 into the linear displacement of the grooving plate 3 along the inclined direction. The motion vector of this inclined feed can be combined with the horizontal transmission vector of the metal narrow sheet, so that the grooving plate 3 and the sheet remain relatively stationary during the grooving process, realizing the uninterrupted processing of "continuous transmission + dynamic grooving". 3. Finally, there is the pressure feedback method. A hydraulic pressure sensing component 8 is set in the fit gap between the wedge slide 4 and the directional bracket 5. The feed amount of the pressure plate 3 is linearly positively correlated with the extrusion force of the wedge. The extrusion force directly acts on the high-strength hydraulic elastic sleeve, so that the hydraulic pressure and the grooving depth form a one-to-one mapping relationship. The groove depth parameter can be obtained in real time by detecting the hydraulic pressure. Then, the support force is corrected and the spindle deflection angle is finely adjusted by the pressure adjustment unit, forming a low-cost closed-loop control logic that does not require an additional displacement sensor. 4. The overall solution adds an extra structure: a gravity pendulum 10 is set on the lower side of the arc frame 6. Utilizing the physical property that the direction of gravity is always vertically downward, it provides a constant centering gravity torque during the rotation of the main shaft. It can automatically counteract the inertial sway caused by the deflection of the main shaft and the vibration of the equipment. The key point is to maintain the stability of the sheet material located in the area between the two bias adjustment positions 303 through the arc frame 6.

[0019] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0020] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0021] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A processing and preparation apparatus for a parallel internal spiral threaded circular tube, characterized in that, in, An integrated frame comprising a grooving section, a rolling section, a circumferential cutting section and a diameter reduction section arranged sequentially (1); The grooving section includes a driving fixture (2) and a grooving plate (3), wherein the outer surface of the grooving plate (3) is provided with multiple sets of parallel cutting teeth (301), and the grooving plate (3) is arranged in a ring array along the output center point of the driving fixture (2). The pressure plate (3) is configured with an directional pressure position (302) and two bias pressure adjustment positions (303) along the annular distribution direction, wherein the bias pressure adjustment positions (303) are mirror-symmetrically distributed along the center line of their center point; Furthermore, a directional bracket (6) is provided in the area between the two biased pressure adjustment positions (303), and a contact guide wheel is provided at both ends of the directional bracket (6); The grooving action is completed by the two directional bias positions (303). The directional bias position (303) is driven by the driving tooling table (3) to perform directional deflection to change the grooving parameters in the grooving action. The directional bracket (6) is used to stabilize the raw material between the two directional bias positions (303).

2. The apparatus for processing and preparing a parallel internal spiral threaded round tube according to claim 1, characterized in that, The drive fixture (2) includes a base and a drive motor. The drive motor has an actuation spindle (9) installed at its output position. The actuation spindle (9) has an orientation adjustment block corresponding to the orientation pressure position (302), an orientation bracket (5) corresponding to the bias adjustment pressure position (303), and an orientation support (7) corresponding to the arc frame (6). The orientation pressure position (302) moves in an orientation direction along the diameter of the output shaft of the drive motor through the orientation adjustment block and is used to change the grooving depth of the orientation pressure position (302) in the grooving action.

3. The apparatus for processing and preparing a parallel internal spiral threaded round tube according to claim 2, characterized in that, The bias adjustment position (303) is equipped with a wedge slide (4) corresponding to the directional bracket (5), and the directional bracket (5) and the wedge slide (4) form a wedge transmission mode.

4. The apparatus for processing and preparing a parallel internal spiral threaded round tube according to claim 3, characterized in that, The inclined wedges in the inclined wedge transmission mode all point to the arc frame (6), and the inclined surface position and the gap position between the directional bracket (5) and the inclined wedge slide (4) are respectively provided with limit slides and hydraulic pressure sensing components (8). The hydraulic pressure sensing components (8) include a high-strength oil pressure elastic sleeve, a detection unit and a pressure regulating unit.

5. The apparatus for processing and preparing a parallel internal spiral threaded round tube according to claim 4, characterized in that, The length direction of the directional bracket (5) and the directional support (7) is parallel to the diameter direction of the main shaft (9). The center point of the arc frame (6) is parallel to the directional support (7), and a gravity pendulum (10) is installed on the lower surface of the arc frame (6) in a fixed direction.

6. The apparatus for processing and preparing a parallel internal spiral threaded round tube according to claim 5, characterized in that, During operation, narrow metal sheets are sequentially fed into the grooving section, rolling section, circumferential cutting section, and diameter reduction section. In the grooving section, a parallel internal spiral thread cutting action is completed, specifically including the following modes: Mode 1: Adjust the setting angle of the grooving plate (3) so that the directional pressing position (302) is located in the lower area, and drive the grooving plate (3) to deflect at a small angle to change the grooving depth by driving the motor; Mode 2: The setting angle of the pressure plate (3) is readjusted. The directional pressure position (302) is located in the uppermost area and does not participate in the grooving action. The two bias pressure adjustment positions (303) participate in the grooving action. The pressure plate (3) is driven by the drive motor to deflect at a small angle. The inclined wedge slide (4) produces a linear movement that is inclined to the diameter direction of the main shaft (9). The hydraulic pressure sensing components (8) in the two bias pressure adjustment positions (303) are used as the detection feedback method.

Images