Continuous feeding type steel pipe outer wall on-line ring adding module and ring adding method

Abstract

The present application relates to the technical field of anchor rod production, and particularly relates to a continuous feeding type steel pipe outer wall on-line ring adding module and a ring adding method, which comprises a wire feeding device, a releasing piece and a plurality of slider assemblies. The wire feeding device is suitable for conveying and shaping the strip-shaped steel material. The strip-shaped steel material output by the releasing piece can be extruded and bent by the sliding action of the plurality of slider assemblies towards the steel pipe to wrap the outer periphery of the steel pipe, thereby forming an outer ring. The beneficial effect is that the cooperation of the releasing piece and the slider assembly enables the strip-shaped steel material to be directly bent and formed into an outer ring outside the steel pipe, without the need for pre-processing into a ring shape and then assembling, thereby simplifying the process flow.

Description

Technical Field

[0001] This invention relates to the technical field of anchor bolt production, and more particularly to a continuous feeding type online ring-adding module and method for the outer wall of steel pipes. Background Technology

[0002] In mining, tunneling, and slope protection engineering, rock bolts are a primary component for reinforcing surrounding rock, and their demand is enormous. A common manufacturing method in the industry is to use a steel pipe as the main body of the rock bolt, with an outer ring at one end. After diameter reduction and welding, a rock bolt with a load-bearing structure is formed. This outer ring plays a crucial role in positioning, grout sealing, and load-bearing during the use of the rock bolt, and the quality of its connection with the steel pipe directly affects the support performance of the rock bolt.

[0003] Currently, the process of adding an outer ring to a steel pipe mostly involves manual or semi-automatic assembly of prefabricated ring components. In practice, this typically requires pre-cutting and rolling the steel strips, then fitting the ring onto the end of the steel pipe, and finally positioning and fixing it at a subsequent workstation. This modular processing method involves multiple independent processes, with the prefabrication of the ring and the fitting operation separated, resulting in less efficient process coordination, frequent material turnover, and difficulty in further improving overall operational efficiency.

[0004] Meanwhile, since the ring body needs to be pre-formed, an assembly gap needs to be reserved between its inner diameter and the outer diameter of the steel pipe. In actual production, the existence of this gap can easily cause fluctuations in the final fit of the outer ring on the steel pipe, affecting the positional stability before welding. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a continuous feeding type online ring-adding module for the outer wall of steel pipe and a steel pipe ring-adding method, which solves the technical problems of loose process connection, frequent material turnover, low overall operation efficiency, and the gap between the ring body and the steel pipe affecting the final quality of the anchor bolt in the prior art anchor bolt ring-adding method.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] In a first aspect, the present invention provides a continuous feeding online ring-forming module for the outer wall of a steel pipe, comprising a wire feeding device, a release component, and multiple slider assemblies. The wire feeding device is suitable for conveying and shaping strip-shaped steel. The release component is connected to the output end of the wire feeding device for outputting the strip-shaped steel. Multiple slider assemblies are circumferentially distributed around the axis of the steel pipe and located downstream of the release component, and each slider assembly is capable of sliding radially along the steel pipe. A collar channel is formed between the multiple slider assemblies, and one end of the steel pipe can extend into the collar channel. The strip-shaped steel output by the release component can be compressed and bent by the sliding action of the multiple slider assemblies towards the steel pipe to wrap around the outer circumference of the steel pipe, thereby forming an outer ring.

[0010] Secondly, the present invention provides a ring-adding method, applied to the online ring-adding module for the outer wall of a continuously fed steel pipe in the above-mentioned technical solution, the ring-adding method comprising:

[0011] S1: Align the axial position of the steel pipe with the position of the collar channel, and extend the steel pipe into the collar channel;

[0012] S2: The strip of steel is output to the inlet of the release element through the wire feeding device;

[0013] S3: When the length of the strip steel output from the outlet of the release element reaches the threshold, the control slider assembly switches from the disengagement position to the extrusion position to form the strip steel onto the steel pipe.

[0014] S4: Control all slider components to switch to the disengaged position;

[0015] S5: Remove the steel pipe from the collar channel.

[0016] (III) Beneficial Effects

[0017] The beneficial effects of the present invention are as follows: First, the cooperation between the release component and the slider assembly allows the strip steel to be bent and formed into an outer ring directly outside the steel pipe, without the need for pre-processing into a ring shape before assembly, thus simplifying the process.

[0018] Secondly, multiple slider assemblies are distributed circumferentially to apply circumferential extrusion force to the strip steel, which helps the strip steel to maintain contact with the outer wall of the steel pipe during bending, improves the fit between the outer ring and the steel pipe, reduces the gap between them, and facilitates stable and high-precision subsequent welding operations.

[0019] After the steel pipe formed using this method completes the collar, it can be further processed into an anchor rod through end diameter reduction and welding. The outer ring and the steel pipe body are stably connected, providing a good structural foundation for subsequent processing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the anchor bolt structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0022] Figure 3 This is a top view of the structure of the present invention;

[0023] Figure 4 This is a side view of the slider assembly of the present invention.

[0024] Figure 5 This is a schematic diagram of the front view structure of the slider assembly of the present invention;

[0025] Figure 6 This is a schematic diagram of the collar principle of the present invention;

[0026] Figure 7 This is one of the structural schematic diagrams of the wire feeding device of the present invention;

[0027] Figure 8 This is a second schematic diagram of the wire feeding device of the present invention;

[0028] Figure 9 This is the third schematic diagram of the wire feeding device of the present invention;

[0029] Figure 10 This is a schematic diagram of the axial sliding manipulator of the present invention;

[0030] Figure 11 This is a schematic diagram of the main structure of the steel pipe end diameter reduction device of the present invention;

[0031] Figure 12 This is one of the top view schematic diagrams of the steel pipe end diameter reduction device of the present invention;

[0032] Figure 13 This is a second top view of the steel pipe end diameter reduction device of the present invention.

[0033] Explanation of reference numerals in the attached figures

[0034] 1: Steel pipe; 2: Outer ring;

[0035] 3: Wire feeding device; 12: Frame; 14: Feeding roller; 14a: Shaping groove; 16: Spacing adjustment mechanism;

[0036] 112: Slider assembly; 1121: Telescopic drive component; 1122: Pressure block;

[0037] 114: Collar channel; 116: Extrusion surface; 118: Release element; A: First cut-off section; B: Second cut-off section;

[0038] 120: Reduction device;

[0039] 122: Reduction die; 122a: Conical cavity;

[0040] 124: Top rod;

[0041] 126: Secondary drive component;

[0042] 128: Main drive component;

[0043] 130: First template;

[0044] 132: Second template;

[0045] 134: Guide rod;

[0046] 136: Base;

[0047] 140: Component receiving;

[0048] 220: Welding equipment;

[0049] 40: Axial sliding manipulator; 402: Slide; 404: Synchronous claw; 406: First spring; 408: Second spring. Detailed Implementation

[0050] To better explain and facilitate understanding of this invention, the following description is provided in conjunction with the appendix. Figures 1-13 The present invention will be described in detail through specific embodiments. In this document, directional terms such as "upper" and "lower" are used interchangeably with other directional terms. Figure 2 The orientation is used as a reference.

[0051] Example 1:

[0052] Reference Figures 1-13 This invention provides a continuous feeding online ring-forming module for the outer wall of a steel pipe 1, comprising a wire feeding device 3, a release member 118, and multiple slider assemblies 112. The wire feeding device 3 is adapted to convey and shape strip-shaped steel. The release member 118 is connected to the output end of the wire feeding device 3 for outputting the strip-shaped steel. Multiple slider assemblies 112 are circumferentially distributed around the axis of the steel pipe 1 and located downstream of the release member 118, and each slider assembly 112 can slide in the radial direction of the steel pipe 1. A collar channel 114 is formed between the multiple slider assemblies 112, and one end of the steel pipe 1 can extend into the collar channel 114. The strip-shaped steel output by the release member 118 can be squeezed and bent by the sliding action of the multiple slider assemblies 112 toward the steel pipe 1 to wrap around the outer circumference of the steel pipe 1, thereby forming an outer ring 2.

[0053] In this embodiment, the continuously fed online ring-forming module for the outer wall of the steel pipe 1 achieves automated ring forming of the outer wall of the steel pipe 1 through the coordinated cooperation of structural components. Specifically, the wire feeding device 3 feeds the shaped strip steel to the inlet of the release member 118, which outputs the strip steel to the ring-forming device. Multiple slider assemblies 112 are arranged circumferentially around the axis of the steel pipe 1, and each slider assembly 112 has the freedom to slide radially along the steel pipe 1, thereby forming a ring channel 114 between the multiple slider assemblies 112, into which one end of the steel pipe 1 can extend. In the working state, the strip steel output by the release member 118 reaches the corresponding position of the ring channel 114, and then the slider assembly 112 slides towards the axis of the steel pipe 1, applying radial extrusion force to the strip steel, causing the strip steel to bend and deform under the constraint of the outer wall of the steel pipe 1, and gradually adhere to the outer circumferential surface of the steel pipe 1, finally forming a tightly attached outer ring 2 structure on the outside of the steel pipe 1.

[0054] First, the continuous and stable supply of strip steel is achieved through the cooperation of the wire feeding device 3 and the release component 118, avoiding the cumbersome operations of pre-cutting, heating, or separate positioning of ring components required in traditional methods, thus significantly improving work efficiency. Second, the radial extrusion method of multiple slider components 112 ensures a tight fit and high circumferential consistency between the formed outer ring 2 and the outer wall of the steel pipe 1, effectively avoiding quality problems such as eccentricity, ellipticity, or local warping. In addition, the entire ring-adding process is cold plastic forming, eliminating the need for preheating of the steel pipe 1 or the steel material, saving energy and avoiding potential damage to the base properties of the steel pipe 1 by the heat-affected zone. Finally, this structure integrates material feeding, shaping, and extrusion forming into a compact online station, facilitating connection with the steel pipe 1 production line or automatic conveyor line, and realizing continuous and automated production of ring-adding at the ends of the steel pipe 1.

[0055] The steel pipe 1 can be used as the main part of the anchor rod, and the two ends of the steel pipe 1 are respectively subjected to the ring-adding and diameter reduction processes.

[0056] Example 2:

[0057] Reference Figures 1-13 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0058] Each slider assembly 112 can switch between a squeeze position and a release position.

[0059] At the extrusion position, the slider assembly 112 is closer to the steel pipe 1 to extrude and bend the strip of steel.

[0060] In the disengaged position, the slider assembly 112 moves further away from the steel pipe 1 to disengage from the formed outer ring 2.

[0061] When a slider assembly 112 switches from the disengagement position to the compression position, it can cut off the strip of steel output from the outlet of the release member 118 so that the length of the cut strip of steel is adapted to the required circumference of the outer ring 2.

[0062] In this embodiment, when in the compression position, the slider assembly 112 moves radially closer to the outer wall of the steel pipe 1. At this time, the inner surface of the slider assembly 112 applies sufficient pressure to the strip steel, causing it to undergo plastic bending deformation and gradually conform to the steel pipe 1. When in the release position, the slider assembly 112 moves radially away from the steel pipe 1, leaving a gap between it and the formed outer ring 2. This avoids scratching the surface of the outer ring 2 when the steel pipe 1 is withdrawn or removed, and also facilitates the entry of the next steel pipe 1 into the collar channel 114.

[0063] One of the slider components 112 can simultaneously cut the strip of steel during the transition from the release position to the extrusion position. The length of the cut strip of steel is exactly equal to the circumference required to circumferentially encircle the outer diameter of the steel pipe 1. In this way, the wire feeding device 3 does not need to pre-cut to a predetermined length externally, nor does it require an additional independent shearing mechanism. The cutting action and the extrusion forming action are completed sequentially within the same slider stroke, that is, cutting first, followed by extrusion bending, or cutting and initial bending occur simultaneously.

[0064] This technical solution integrates the cutting function into one of the slider components 112, eliminating the need for a separate cutting device and its control module, simplifying the overall structure, and reducing equipment manufacturing costs and maintenance difficulty. The cutting action is linked to the radial feed of the slider component 112, ensuring that the length of the cut strip steel automatically adapts to the outer diameter of the current steel pipe 1, eliminating the need for manual measurement or adjustment and preventing the outer ring 2 from being too loose or too tight due to inaccurate length setting. Since the cutting occurs before the strip steel is compressed and bent, and is adjacent to the forming area, it avoids swaying, jamming, or positional deviation caused by long material conveying, improving the positional accuracy and consistency of the ring. Multiple slider components 112 leave sufficient space when disengaging, allowing the steel pipe 1 to smoothly enter and exit the collar channel 114 without interfering with the already formed outer ring 2, making it particularly suitable for continuous online production. The entire switching process can be completed quickly with the reciprocating motion of the slider component 112, matching the feed cycle of the steel pipe 1, further ensuring the stability and cycle time of continuous feeding operations.

[0065] Example 3:

[0066] Reference Figures 1-13 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0067] Each slider assembly 112 includes a telescopic drive 1121 and a pressure block 1122, with the pressure block 1122 fixedly connected to the telescopic end of the telescopic drive 1121. The surface of the pressure block 1122 facing the steel pipe 1 has an extrusion surface 116 that is adapted to the outer circumferential shape of the steel pipe 1 and the shape of the strip steel.

[0068] In this embodiment, the telescopic drive 1121 drives the pressure block 1122 to move radially along the steel pipe 1, switching between the extrusion position and the release position. During the forming process, the extrusion surface 116 on the surface of the pressure block 1122 contacts the outer side of the strip steel, constraining and shaping the bent strip steel, resulting in a regular contour shape on the outer periphery of the formed outer ring 2. The extrusion surfaces 116 on multiple pressure blocks 1122 collectively form a cavity matching the outer periphery of the outer ring 2 during the extrusion position, ensuring a uniform cross-sectional shape in the circumferential direction and reducing surface defects caused by uneven local deformation. Simultaneously, the presence of the extrusion surface 116 increases the contact area between the pressure block 1122 and the strip steel, allowing the extrusion force to act more evenly on the surface of the strip steel, avoiding localized indentations or material damage that may be caused by point or line contact. When the telescopic drive 1121 drives the pressure block 1122 to retract to the disengagement position, the extrusion surface 116 separates from the outer circumference of the outer ring 2, making it easy to remove the formed steel pipe 1 smoothly without jamming or scratching.

[0069] Example 4:

[0070] Reference Figures 1-13 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0071] A first cut-off portion A is formed on the pressure block 1122 adjacent to the downstream side of the release member 118, and a second cut-off portion B is formed on the downstream side of the release member 118. During the process of the corresponding slider assembly 112 switching from the disengagement position to the compression position, the first cut-off portion A and the second cut-off portion B can cut off the strip steel.

[0072] In this embodiment, the pressure block 1122 has a first cut-off portion A at a position facing the incoming direction of the strip steel. Correspondingly, a second cut-off portion B is provided at the downstream outlet position of the release member 118. The first cut-off portion A and the second cut-off portion B are arranged opposite each other in space, and their cutting edge profiles match each other. When the slider assembly 112 moves radially from the disengagement position to the extrusion position, the pressure block 1122 moves closer to the axis of the steel pipe 1, and the first cut-off portion A gradually approaches the second cut-off portion B. At a certain moment before the slider assembly 112 reaches the extrusion position, the first cut-off portion A and the second cut-off portion B form a shearing engagement, cutting off the strip steel located between them. The cut strip steel is then squeezed and bent by the slider assembly 112 and other slider assemblies 112, and finally adheres to the outer wall of the steel pipe 1.

[0073] The cutting position is adjacent to the outlet of the release member 118. After the strip of steel is cut, the remaining part remains within the release member 118, preventing long-segment springback or random swinging, facilitating refeeding in the next ring-feeding cycle. The first cutting part A, as part of the pressure block 1122, is very easy to install and replace. When the cutting edge wears down, only the pressure block 1122 needs to be replaced, without disassembling the entire slider assembly 112, reducing maintenance costs. The second cutting part B is fixed to the release member 118 and does not move with the slider, so its positional accuracy is easy to ensure. As long as the radial stroke of the slider assembly 112 is accurately controlled, the length of each cut is highly consistent. Since the cutting action occurs when the slider assembly 112 is about to reach the extrusion position, rather than at the disengagement position or the end of the extrusion position, there is a very short time difference between the cutting and bending actions. The strip steel is cut off first, and then each slider assembly 112 continues to close to complete the bending. This avoids the strip steel being pulled by the slider assembly 112 because it was not cut off, thus ensuring that the end face of the outer ring 2 after forming is flat and free of burrs or tensile deformation.

[0074] Example 5:

[0075] Reference Figures 1-13 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0076] The slider assembly 112 consists of three sets, with two sets of slider assemblies 112 symmetrically located on both sides of the collar channel 114 along the vertical direction, which is suitable for extruding and bending the ends of the strip steel.

[0077] Another set of slider assemblies 112 is located at the top of the collar channel 114, which is adapted to compress and bend the middle of the strip steel, and a first cut-off portion A is formed on the pressure block 1122 on the slider assembly 112.

[0078] In this embodiment, when the top slider assembly 112 switches from the disengagement position to the compression position, the first cutting part A and the second cutting part B work together to shear and cut the continuously fed strip of steel. The length of the cut strip of steel is exactly the required circumference of the outer diameter of the steel pipe 1. Subsequently, the top slider assembly 112 continues to descend and initially presses the middle part of the strip of steel onto the steel pipe 1. Then, the left and right slider assemblies 112 together apply radial pressure to the ends of the strip of steel, so that it finally adheres to the outer wall of the steel pipe 1.

[0079] The symmetrically arranged slider assemblies 112 on the left and right sides are specifically responsible for bending and shaping the two ends of the strip steel. Since the end areas are often free ends formed after cutting, they are prone to warping or misalignment during bending. The slider assemblies 112 on the left and right sides can apply direct pressure near the ends, effectively suppressing end warping and ensuring that the closed part of the outer ring 2 is flat and firm. The top slider assembly 112 undertakes the dual tasks of cutting and bending in the middle. The cutting position is located in the middle area of ​​the strip steel. After cutting, both ends of the steel naturally extend to the left and right sides, which corresponds exactly to the pressure areas of the left and right slider assemblies 112. This reasonable distribution of the force points for cutting and shaping avoids the problem of one end being too long and the other end being insufficient due to the cutting point being close to the end. The three sets of slider assemblies 112 are arranged in a triangular distribution of the top and left and right sides. Compared with the structure of four or more sets, this simplifies the module, reduces the drive mechanism, and lowers the failure rate while ensuring sufficient constraint force. The cutting action occurs only on the top slider assembly 112. The other two slider assemblies 112 only need to focus on bending, without the need for machining the cutting edge, resulting in lower manufacturing and maintenance costs. Since the left and right slider assemblies 112 are not restricted by the cutting mechanism in the vertical direction, they can be designed to be more compact. In actual production, after the steel pipe 1 passes through the collar channel 114, the top slider assembly 112 completes the cutting first and begins to descend. The left and right slider assemblies 112 follow closely behind and close synchronously. The three work together smoothly, ensuring the accuracy of the cutting length and achieving uniform fit of the outer ring 2 around the entire circumference. This is especially suitable for online continuous ring-adding operations of medium-diameter steel pipes 1.

[0080] Example 6:

[0081] Reference Figures 1-13 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0082] The collar module is used in conjunction with the steel pipe 1 forming mechanism and the receiving component 140. The steel pipe 1 forming mechanism is located upstream of the collar module and is suitable for forming the sheet metal into the steel pipe 1.

[0083] The receiving component 140 connects with the output port of the steel pipe 1 forming mechanism to form the first station, which is used to support the formed steel pipe 1 and position it.

[0084] The steel pipe 1 forming mechanism is located upstream of the collar module. Its function is to gradually bend, join, and finally form the flat plate into a segmented steel pipe 1. The receiving component 140 is directly connected to the output port of the steel pipe 1 forming mechanism, forming a defined first station for receiving the formed steel pipe 1 output from the steel pipe 1 forming mechanism, and supporting and positioning the steel pipe 1 at this station.

[0085] In this embodiment, the relevant technical solutions in the multi-station processing module and production line of straight profiles in application number 202311701395.3 can be referenced and understood. By adapting the bending mold in the prior art solution to suit the cross-sectional shape and size specifications of the steel pipe 1 required by this module, the flat plate is gradually bent, closed, and finally formed into a continuous segmented steel pipe 1. After the formed segmented steel pipe 1 is sent out from the output port of the steel pipe 1 forming mechanism, it directly enters the first station defined by the receiving component 140, thereby realizing a seamless connection from the forming of steel pipe 1 to the subsequent ring-jointing process. The direct connection between upstream and downstream processes can effectively shorten the waiting time and material transfer distance between processes, further compress the process downtime, and thus improve the operating efficiency of the entire anchor bolt production line.

[0086] The receiving assembly 140 can be structured using several idlers with parallel axes. Each idler has an annular groove machined on its surface, the contour of which matches the outer wall of the steel pipe 1, for example, a V-shaped groove, to accommodate and constrain the steel pipe 1, preventing it from shifting radially. At least some of these idlers have an active rotation function, i.e., they are driven to rotate by a motor or other drive device. The actively rotating idlers can transport the steel pipe 1 placed on them to one end of the first station. A positioning plate is provided at the end of the first station. When the steel pipe 1 moves continuously under the drive of the idlers until its end abuts against the positioning plate, the steel pipe 1 is positioned axially. Combined with the radial constraint of the steel pipe 1 by the annular grooves on the idlers, the steel pipe 1 achieves reliable positioning in two directions on the receiving assembly 140, thus providing an accurate positional reference for the subsequent ring-shrinking process.

[0087] By directly connecting the steel pipe 1 forming mechanism with the collar module, intermediate storage and manual transfer are eliminated, reducing work-in-process inventory and operator intervention, which is conducive to achieving fully automated production. The structure employing an active idler roller with a ring groove and an end positioning plate enables simultaneous radial centering and axial positioning of the steel pipe 1 at the same station. This results in a compact structure with high positioning accuracy, avoiding uneven stress on the strip steel or misalignment of the forming position during collar assembly due to deviations in the position of the steel pipe 1. The receiving component 140 has a simple structure, is easy to maintain, and can adapt to steel pipes 1 of different lengths; only the position of the positioning plate or the number of idlers needs to be adjusted, demonstrating good versatility and flexibility.

[0088] Example 7:

[0089] Reference Figures 1-13 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0090] It also includes an axial sliding manipulator 40, which is adapted to switch between a collar position and a flow position.

[0091] When in the ring-locking position, the steel pipe 1 is grasped and one end is inserted into the ring-locking channel 114 of the ring-locking device to perform the ring-locking operation. When in the transfer position, the steel pipe 1 is grasped and one end is withdrawn from the ring-locking channel 114.

[0092] At the processing position, one end of the steel pipe 1 is aligned with the collar device. The axial sliding manipulator 40 controls the length of the steel pipe 1 extending into the collar channel 114, ensuring the consistency of the axial fitting position of the outer ring 2 on the steel pipe 1. At the transfer position, the steel pipe 1 after the collar process can be transferred to the clamping device of the downstream welding module by the transfer manipulator, so that the entire production line forms a continuous material flow from steel pipe 1 forming, collar fitting to welding, reducing manual intervention and intermediate accumulation of workpieces.

[0093] Example 8:

[0094] Reference Figures 1-13 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0095] The wire feeding device 3 includes a frame 12 and multiple feeding rollers 14. The multiple feeding rollers 14 are rotatably connected to the frame 12 in parallel, and are spaced apart along the length of the strip steel, with two sets symmetrically arranged along the length of the strip steel. Each set of feeding rollers 14 has a circumferentially formed forming groove 14a adapted to the strip steel. The linear velocity of each feeding roller 14 corresponding to the position of the forming groove 14a is equal. A conveying channel is formed between the two symmetrical forming grooves 14a along the length of the strip steel, and the conveying channel is connected to the inlet of the release member 118.

[0096] Furthermore, the spacing between the two sets of feeding rollers 14 is adjustable. The wire feeding device 3 also includes a spacing adjustment mechanism 16, which is supported on the frame 12. The drive end of the spacing adjustment mechanism 16 is connected to the feeding rollers 14 to adjust the spacing between the two sets of feeding rollers 14 so that the wire feeding device 3 can adapt to strip steel of different thicknesses. The spacing adjustment mechanism 16 can be configured as a hydraulic cylinder.

[0097] Each feed roller 14 has two parallel forming grooves 14a, enabling the wire feeding device 3 to perform the forming and conveying of two strips of steel at one time. In conjunction with the release component 118 and the slider assembly 112, two outer rings 2 are formed on the steel pipe 1 at one time to improve the ring forming efficiency.

[0098] In this embodiment, by arranging multiple feeding rollers 14 at intervals along the length direction and setting matching shaping grooves 14a on the upper and lower sets of feeding rollers 14, the strip steel is straightened and shaped multiple times during the conveying process, which effectively eliminates the bending or twisting in the raw materials and ensures that the steel entering the release member 118 has a stable straightness and cross-sectional shape, thereby improving the dimensional accuracy of the outer ring 2 forming.

[0099] All the feeding rollers 14 have the same linear speed at the forming groove 14a, which avoids scratches on the steel surface or uneven internal stress caused by asynchronous speeds. It also ensures the accuracy of the conveying length and provides a good premise for subsequent fixed-length cutting.

[0100] The spacing between the two sets of feeding rollers 14 is adjustable, which allows the same wire feeding device 3 to flexibly adapt to strip steel of different thicknesses without replacing the entire set of feeding rollers 14, thus reducing changeover time and equipment costs.

[0101] Each feeding roller 14 is provided with two parallel forming grooves 14a, which enables the device to convey two strips of steel at the same time. In conjunction with the downstream release component 118 and slider assembly 112, two outer rings 2 can be formed on the same steel pipe 1 at one time, doubling the ring forming efficiency. It is particularly suitable for anchor rods or other pipe products that require double ring reinforcement.

[0102] The two conveying channels operate completely independently and synchronously without interfering with each other. Furthermore, since all the feeding rollers 14 are machined as a whole, the center distance and height of the two channels are consistent, thereby ensuring that the axial position of the two outer rings 2 on the steel pipe 1 is relatively accurate and avoiding positional deviations caused by separate feeding.

[0103] The entire wire feeding device 3 has a compact structure, integrating shaping, conveying, and dual channels into one unit, reducing the equipment footprint and facilitating a compact arrangement with the steel pipe 1 forming mechanism and the receiving component 140, which is beneficial for the automation of the entire production line.

[0104] Example 9:

[0105] Figures 1-13 In addition to providing a ring-adding method, the embodiments of the present invention are applied to the online ring-adding module for the outer wall of the continuously fed steel pipe 1 in any of the above embodiments. The ring-adding method includes:

[0106] S1: The axial sliding manipulator 40 aligns the axial position of the steel pipe 1 with the position of the collar channel 114, and clamps the steel pipe 1. At this time, the axial sliding manipulator 40 is in a state that allows the steel pipe 1 to slide axially, thereby allowing the steel pipe 1 to extend into the collar channel 114 until it switches to the collar position.

[0107] S2: Control the wire feeding device 3 to shape the strip steel and output the strip steel to the inlet of the release device 118.

[0108] S3.1: When the length of the strip steel output from the outlet of the release member 118 reaches a threshold, the slider assembly 112 located downstream of the outlet of the release member 118 is controlled to switch from the disengagement position to the extrusion position, so as to partially form the strip steel onto the steel pipe 1 while cutting off the strip steel.

[0109] S3.2: Control other slider components 112 to switch from the disengagement position to the extrusion position so as to form all the strip steel on the steel pipe 1.

[0110] S4: Control the slider assembly 112 to switch to the disengagement position to disengage from the formed outer ring 2.

[0111] S5: The steel pipe 1 is removed from the collar channel 114 by the axial sliding manipulator 40, and the steel pipe 1 is switched from the collar position to the transfer position. At this time, the steel pipe 1 can be transferred to the welding station for welding operation.

[0112] Specifically, this embodiment provides a method for adding an online ring to the outer wall of a continuously fed steel pipe 1, which is carried out according to the following steps.

[0113] S1: First, the axial sliding manipulator 40 adjusts the posture of the steel pipe 1, which has been formed and is located on the receiving component 140, so that the axial position of the steel pipe 1 is aligned with the axial position of the collar channel 114. Under the compression of the steel pipe 1 by the diameter reduction device 120, the axial sliding manipulator 40 allows the steel pipe 1 to float axially elastically a first distance, thereby allowing the steel pipe 1 to be inserted into the collar channel 114 until the end of the steel pipe 1 reaches the preset collar position.

[0114] S2: The wire feeding device 3 is controlled to shape the strip steel, including straightening, rounding, and surface cleaning, and outputs the shaped strip steel to the inlet of the release member 118. After being guided by the release member 118, the strip steel extends out from the outlet of the release member 118 and enters the collar channel 114. At this time, the strip steel is located between the outer peripheral surface of the steel pipe 1 and the inner surface of each slider assembly 112.

[0115] S3.1: When the length of the strip steel output from the outlet of the release member 118 reaches a preset threshold, the control module issues a command to control the top slider assembly 112, located downstream of the outlet of the release member 118 and equipped with the first cut-off portion A, to switch from the disengagement position to the compression position. During the radial feeding process of the slider assembly 112, the first cut-off portion A on its pressure block 1122 forms a shearing engagement with the second cut-off portion B downstream of the release member 118, cutting the strip steel. Subsequently, the inner surface of the slider assembly 112 begins to contact and compress the cut strip steel, causing it to bend locally and initially adhere to the upper outer wall of the steel pipe 1, thus achieving partial forming.

[0116] S3.2: After the cutting and initial forming are completed, the remaining two slider assemblies 112, namely the slider assemblies 112 symmetrically arranged on the left and right sides, are also controlled to switch from the disengagement position to the extrusion position simultaneously. At this time, the top slider assembly 112 continues to press down to the final extrusion position. The three slider assemblies 112 apply radial pressure to the strip steel from three different directions, namely the top, left, and right, so that the remaining part of the strip steel is completely bent and tightly attached to the outer wall of the steel pipe 1, thereby forming a complete and uniformly fitted closed outer ring 2.

[0117] S4: After the outer ring 2 is fully formed, the control module controls all slider assemblies 112 to switch back to the disengaged position, that is, each slider assembly 112 moves outward radially, so that the formed outer ring 2 is disengaged from the inner surface of the slider assembly 112, so as to avoid friction or scratches when the steel pipe 1 is withdrawn.

[0118] S5: Under the action of elastic force, the axial sliding manipulator 40 pulls the steel pipe 1 in the opposite direction, causing the end of the steel pipe 1 to gradually exit from the collar channel 114, and the steel pipe 1 switches from the collar position back to the transfer position. At this time, the steel pipe 1 with the outer ring 2 already fitted can be transferred to the subsequent welding station. At the welding station, the joint between the steel pipe 1 and the outer ring 2 is welded, and finally the finished anchor rod or other pipe workpiece is obtained.

[0119] This technical solution first aligns the steel pipe 1 with its axis using the axial sliding manipulator 40 in S1, and then pushes the steel pipe 1 into the collar channel 114 using the extrusion force of the diameter reduction device 120. This avoids the steel pipe 1 from becoming eccentric or stuck when entering the collar channel 114, and is especially suitable for steel pipes with a large length-to-diameter ratio, thus improving the consistency of the collar position.

[0120] The cutting and forming process is divided into two sub-steps. The top slider assembly 112 first cuts and initially forms the outer ring, and then the three slider assemblies 112 work together to complete the full circumferential forming. This ensures the neatness of the cut end face and avoids the displacement of the steel due to the cutting impact, so that the outer ring 2 ends overlap smoothly and without warping after forming.

[0121] Throughout the entire process, the steel pipe 1 is automatically fed, ringed, demolded and withdrawn, all by the switching of the robot and the slider assembly 112, without the need for manual intervention, which significantly improves the production cycle and safety.

[0122] This method forms a smooth flow operation with the upstream steel pipe 1 forming mechanism and the downstream welding station. It is especially suitable for arranging the welding process after the collar. At this time, the outer ring 2 acts as a clamp on the end of the steel pipe 1, which can effectively reduce welding thermal deformation. At the same time, the joint of the outer ring 2 and the longitudinal joint of the steel pipe 1 can be welded in the same station, which improves the welding quality and efficiency.

[0123] Specifically, the axial sliding manipulator 40 includes a slide block 402, a synchronizing claw 404, and a first spring 406. The synchronizing claw 404 is slidably connected to the slide block 402 along the axial direction of the steel pipe 1 and is capable of gripping and releasing the steel pipe 1; the first spring 406 is disposed between the synchronizing claw 404 and the slide block 402; the synchronizing claw 404 can slide and switch between a floating position and a stable position; in the floating position, the synchronizing claw 404 elastically floats a first distance toward the other end of the narrowed end of the steel pipe 1, and the first spring 406 deforms to accumulate a force that resets the synchronizing claw 404 from the floating position to the stable position; in the stable position, the synchronizing claw 404 is fixed relative to the slide block 402 along the axial direction of the steel pipe 1.

[0124] Because of the structure that uses the first spring 406 to achieve an elastic floating connection between the synchronous claw 404 and the slide block 402, the steel pipe 1 can obtain a controlled axial yield degree of freedom during the diameter reduction process, avoiding bending or surface scratches of the steel pipe 1 caused by rigid clamping. At the same time, since the first spring 406 accumulates a restoring force during the floating process, when the tube reduction mold retracts and the end of the steel pipe 1 disengages from the conical cavity 122a, the spring force can assist the synchronous claw 404 and the steel pipe 1 to return to a stable position, providing accurate initial positioning for the next diameter reduction process.

[0125] The first spring 406 is a compression spring and is located on the side of the synchronizing claw 404 away from the reduced-diameter end of the steel pipe 1. The axial sliding manipulator 40 also includes a second spring 408, which is also a compression spring and is located on the side of the synchronizing claw 404 near the reduced-diameter end of the steel pipe 1. In the stable position, the two sides of the synchronizing claw 404 along the axial direction of the steel pipe 1 respectively abut against the first spring 406 and the second spring 408 and maintain elastic force balance. In this embodiment, the two compression springs are located on both sides of the axial direction of the synchronizing claw 404, and in the stable position, the two sides of the synchronizing claw 404 abut against the first spring 406 and the second spring 408 respectively. At this time, the two springs are in a pre-compressed state and their elastic forces are balanced. Therefore, the synchronizing claw 404 can maintain a stable zero-point reference in this position.

[0126] The diameter reduction device 120 includes a diameter reduction mold 122 and an ejector pin 124.

[0127] The diameter reduction die 122 has a conical cavity 122a formed on the end face of the steel pipe 1, which is suitable for diameter reduction. Both ends of the conical cavity 122a are open along the axial direction. The diameter reduction die 122 can slide and switch between a pressing position and a first retraction position along the axial direction of the steel pipe 1. In the pressing position, the end of the steel pipe 1 is in contact with the conical cavity 122a to achieve diameter reduction. In the first retraction position, the conical cavity 122a is disengaged from the steel pipe 1.

[0128] Both the conical cavity 122a and the push rod 124 are coaxial with the steel pipe 1. The push rod 124 can slide and switch between the abutting position and the second retracted position along the axial direction of the steel pipe 1. In the abutting position, the push rod 124 extends into the conical cavity 122a and abuts against the end of the steel pipe 1. In the second retracted position, the push rod 124 separates from the end of the steel pipe 1.

[0129] The diameter reduction device 120 can switch between the diameter reduction state and the demolding state.

[0130] In the reduced diameter state, the reduced diameter die 122 slides from the first retracted position to the extrusion position to perform the reduced diameter process. In the demolding state, the ejector pin 124 switches to or remains in the abutment position, and the reduced diameter die 122 slides from the extrusion position to the first retracted position to perform the demolding process.

[0131] In this embodiment, the device is particularly suitable for reducing the diameter of the end of a steel pipe 1 with a pre-cut diameter reduction groove, thereby making the steel pipe 1 into an anchor rod. The diameter reduction mold 122 has an inner conical cavity 122a machined at one end facing the steel pipe 1. This cavity 122a is open at both ends along the axial direction, with the larger end facing the steel pipe 1, facilitating the entry of the end of the steel pipe 1 and subjecting it to radial compression. Since the conical cavity 122a is coaxially arranged with the steel pipe 1, and the diameter reduction mold 122 can slide and switch between the extrusion position and the first retraction position along the axial direction of the steel pipe 1, when the diameter reduction mold 122 moves from the first retraction position to the extrusion position, the end of the steel pipe 1 is gradually and uniformly extruded by the inner conical surface of the conical cavity 122a to achieve diameter reduction, ensuring that the outer contour after diameter reduction matches the shape of the conical cavity 122a, thus improving the diameter reduction accuracy. When the diameter reduction mold 122 slides back to the first retraction position, the conical cavity 122a completely detaches from the steel pipe 1, providing space for demolding or the next loading.

[0132] The ejector rod 124 is also coaxially arranged with the steel pipe 1 and can slide between the abutting position and the second retracted position along the axial direction of the steel pipe 1. When the ejector rod 124 is in the abutting position, its front end extends into the conical cavity 122a and just abuts against the end of the steel pipe 1. When the ejector rod 124 retracts to the second retracted position, it separates from the end of the steel pipe 1. Since the axial movement of the ejector rod 124 and the reducing die 122 are independent of each other, and both are coaxial with the steel pipe 1, they can respectively undertake the functions of extrusion and pushing and assisting demolding at different stages.

[0133] The entire diameter reduction device 120 can switch between a diameter reduction state and a demolding state. In the diameter reduction state, the diameter reduction mold 122 gradually slides from the first retraction position to the extrusion position. At this time, the ejector rod 124 can be in the abutment position or the second retraction position, preferably in the abutment position to limit the deformation of the steel pipe 1. The end of the steel pipe 1 is radially compressed in the conical cavity 122a, completing the diameter reduction process.

[0134] In the demolding state, the ejector rod 124 first switches to or remains in the abutting position, with its front end abutting the end of the steel pipe 1. Then, the reducing die 122 slides back from the extrusion position to the first retraction position. Since the ejector rod 124 remains stationary, the end of the steel pipe 1 is blocked by the ejector rod 124 and cannot retract with the reducing die 122. Therefore, relative movement occurs between the conical cavity 122a of the reducing die 122 and the end of the steel pipe 1, forcing the steel pipe 1 to dislodge from the conical cavity 122a. This demolding method, using the reverse stop of the ejector rod 124, avoids the problem of the steel pipe 1 being stuck in the conical cavity 122a after traditional reducing die cavities. Because of the coordinated action of the ejector rod 124 actively abutting the end of the steel pipe 1 and the reducing die 122 sliding away in the reverse direction during demolding, reliable and rapid demolding can be achieved, reducing scratches on the outer surface of the steel pipe 1 and improving production efficiency. The entire device completes the entire process of reducing die cavities and demolding through the sequential action of two sliding parts in different states. It has a compact structure and is easy to operate.

[0135] The diameter reduction device 120 can also be switched to a separated state.

[0136] In the separated state, the reducing mold 122 is held or switched to the first retracted position, and the push rod 124 is held or switched to the second retracted position, so that the steel pipe 1 can be disengaged from the reducing device 120.

[0137] The diameter reduction device 120 can also be switched to a disengaged state, which is mainly used for unloading the processed steel pipe 1 or loading the steel pipe 1 to be processed. In the disengaged state, the diameter reduction mold 122 remains or actively switches to the first retracted position, at which point the conical cavity 122a is completely detached from the steel pipe 1, and no radial constraint is applied to the steel pipe 1. At the same time, the push rod 124 remains or actively switches to the second retracted position, so that its front end exits the conical cavity 122a and separates from the end of the steel pipe 1. Since both the diameter reduction mold 122 and the push rod 124 retract to a position where they are not in contact with the steel pipe 1, there is no longer any mechanical interference between the steel pipe 1 and the entire device. Therefore, the steel pipe 1 can freely detach from the diameter reduction device 120 in the axial or radial direction, which facilitates quick workpiece replacement. By adopting the separation state where the reducing mold 122 and the ejector rod 124 retract to the non-working position, on the one hand, the mold or ejector rod 124 is prevented from accidentally colliding with the end of the steel pipe 1 during unloading or loading, causing surface damage or positioning deviation. On the other hand, it also provides clear clearance space for automated loading and unloading, thereby improving production cycle and operational safety.

[0138] The diameter reduction device 120 also includes a secondary drive component 126, a main drive component 128, a first template 130, a second template 132, a guide rod 134, and a base 136.

[0139] The drive end of the auxiliary drive component 126 is fixedly connected to the diameter reduction die 122, and is suitable for driving the diameter reduction die 122 to slide and switch along the axial direction of the steel pipe 1 between the extrusion position and the first retraction position.

[0140] The driving end of the main driving component 128 is fixedly connected to the push rod 124, which is suitable for driving the push rod 124 to slide and switch along the axial direction of the steel pipe 1 between the abutment position and the second retraction position.

[0141] The reducing mold 122 is fixedly connected to the first template 130, and the driving end of the auxiliary drive component 126 is fixedly connected to the first template 130. A through channel coaxial with and connected to the conical cavity 122a is formed on the first template 130.

[0142] The push rod 124 is fixedly connected to the second template 132. The push rod 124 can extend from the through channel to the cone cavity 122a. The driving end of the main drive member 128 is fixedly connected to the second template 132, and the auxiliary drive member 126 is supported on the second template 132.

[0143] The guide rod 134 is suitable for establishing a sliding connection between the first template 130 and the second template 132 along the axial direction of the steel pipe 1.

[0144] The main drive component 128 is supported on the base 136. The guide rod 134 is also supported on the base 136 and passes through the first template 130 and the second template 132.

[0145] In this embodiment, when the main drive member 128 drives the second template 132 to slide axially along the steel pipe 1, since the auxiliary drive member 126 is supported on the second template 132 and its driving end is connected to the first template 130, the auxiliary drive member 126, the first template 130, and the diameter reduction mold 122 fixed thereon will move axially together with the second template 132. That is, the second template 132, as a common carrier of the auxiliary drive member 126 and the first template 130, realizes the overall movement. When the diameter reduction process needs to be performed, that is, after the second template 132 has moved to the preset working position so that the push rod 124 abuts against the end of the steel pipe 1, the auxiliary drive member 126 then slides axially independently relative to the second template 132, pushing the first template 130 and the diameter reduction mold 122 to continue to move forward, so that the end of the steel pipe 1 enters the conical cavity 122a and completes the extrusion.

[0146] Because a dual-layer motion mechanism is adopted, in which the secondary drive component 126 moves as a whole with the second template 132 and then slides independently, the required stroke of the secondary drive component 126 itself can be significantly reduced. This is because the total displacement of the reducing die 122 from its initial position to its extrusion position is decomposed into two parts: one part is achieved by the main drive component 128 moving the second template 132, and the other part is achieved by the extension and retraction of the secondary drive component 126 itself. In this way, the secondary drive component 126 only needs to handle the stroke corresponding to the actual depth of the reducing die 122 pressing into the conical cavity 122a, without needing to cover the entire idle stroke. Due to the smaller stroke of the secondary drive component 126, a more compact and faster-responding drive element can be selected, while simultaneously reducing manufacturing costs and energy consumption during movement.

[0147] In the demolding state, when it is necessary to remove the steel pipe 1 from the conical cavity 122a, the main drive component 128 can keep the second template 132 stationary. At this time, the ejector rod 124, due to its fixed connection with the second template 132, remains in the abutment position, always abutting the end of the steel pipe 1. Subsequently, the auxiliary drive component 126 is activated separately, causing it to drive the first template 130 and the diameter reduction mold 122 to retract away from the steel pipe 1 to the first retraction position. Since the second template 132 remains stationary, the ejector rod 124 will not retract, so the end of the steel pipe 1 naturally disengages from the conical cavity 122a under the obstruction of the ejector rod 124, completing the demolding. Since the second template 132 does not need to move during the demolding process, the main drive component 128 does not need to participate in the demolding action, simplifying the control timing.

[0148] In summary, by adopting a layered driving scheme in which the main drive component 128 drives the second template 132 and the supporting auxiliary drive component 126 and the first template 130 to move as a whole, and the auxiliary drive component 126 independently performs small-stroke extrusion or retraction, the diameter reduction device 120 can not only smoothly complete the diameter reduction process with a small stroke of the auxiliary drive component 126, but also achieve reliable demolding by independently controlling the retraction of the auxiliary drive component 126, thus ensuring the integrity of the function.

[0149] Specifically, the fixed connection relationships of the above-mentioned components include, but are not limited to, flange bolt connections and welding.

[0150] The reducing die 122 is detachably connected to the first template 130, and there are multiple dies with different conical cavities 122a. The connection method is flange bolts.

[0151] In this embodiment, since the diameter reduction mold 122 and the first template 130 are detachably connected, the operator can quickly change to the corresponding cone cavity 122a model mold according to the diameter, wall thickness, and required diameter reduction amount of the steel pipe 1 to be processed and the anchor rod end. Because multiple different cone cavity 122a model molds are provided, the same diameter reduction device 120 can cover the production needs of various anchor rod specifications, eliminating the need for separate machine design for each steel pipe 1 size. The modular mold replacement structure significantly reduces equipment investment costs and workshop space requirements, and also significantly shortens the changeover time for the diameter reduction process, making it particularly suitable for small-batch, multi-variety production. Furthermore, when a mold wears out due to long-term use, only that mold needs to be replaced without scrapping the first template 130 or the entire drive assembly, thus reducing maintenance costs. Since the cone cavity 122a model precisely matches the parameters of the steel pipe 1, the diameter reduction of the steel pipe 1 results in better consistency in end dimensions, which is beneficial for the reliability of subsequent anchor rod installation.

[0152] When the reducing device 120 performs the reducing process, the end of the steel pipe 1 is squeezed by the conical cavity 122a, and the main body of the steel pipe 1 drives the synchronizing claw 404 to slide away from the reducing end. During this process, the first spring 406 located at the rear is further compressed, and its elastic force increases; while the compression of the second spring 408 located at the front decreases accordingly, and its elastic force decreases. Since the resultant force of the two springs is opposite to the sliding direction, the synchronizing claw 404 obtains a gradually increasing restoring force.

[0153] In a stable position, the two springs are in a state of elastic equilibrium, allowing the synchronous claw 404 to naturally stabilize its gripping position on the steel pipe 1 without relying on an external locking mechanism, facilitating rapid alignment during loading and unloading. Due to the presence of the second spring 408, even if the steel pipe 1 is subjected to an unexpected impact towards the reduced diameter end during non-reduced diameter operation, such as when the steel pipe 1 collides with the mold during loading, the synchronous claw 404 can elastically float forward to absorb the impact energy, preventing rigid collisions that could damage the workpiece or the gripper. In summary, the balanced floating structure with the first spring 406 and the second spring 408 arranged in opposite directions not only improves the stability and accuracy of the steel pipe 1's movement during the reduced diameter process but also enhances the robot's impact resistance and adaptability to different operating conditions on the production line.

[0154] It can be understood that, except for conflicting parts, the above embodiments 1-9 can be freely combined to form other embodiments of the present invention.

[0155] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0156] 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 part; they can refer to a mechanical connection or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0157] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0158] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0159] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A continuous feeding type online ring-adding module for the outer wall of steel pipes, characterized in that, include: The wire feeding device (3) is suitable for conveying and shaping strip steel. The release element (118) is connected to the output end of the wire feeding device (3) and is used to output strip steel. Multiple slider assemblies (112) are circumferentially distributed around the axis of the steel pipe (1) and located downstream of the release member (118), and each slider assembly (112) is capable of sliding in the radial direction of the steel pipe (1). A collar channel (114) is formed between multiple slider assemblies (112), and one end of the steel pipe (1) can extend into the collar channel (114); The strip of steel output by the release member (118) can be squeezed and bent by the sliding action of multiple slider assemblies (112) towards the steel pipe (1) to wrap around the outer periphery of the steel pipe (1) and thus form an outer ring (2).

2. The continuous feeding type online ring-adding module for the outer wall of steel pipe as described in claim 1, characterized in that, Each slider assembly (112) can switch between a squeeze position and a release position; In the extrusion position, the slider assembly (112) is closer to the steel pipe (1) to extrude and bend the strip steel; In the disengaged position, the slider assembly (112) moves further away from the steel pipe (1) to disengage from the formed outer ring (2). When a slider assembly (112) switches from the disengagement position to the compression position, it is able to cut off the strip of steel output from the outlet of the release member (118) so that the length of the cut strip of steel is adapted to the required circumference of the outer ring (2).

3. The online ring-adding module for the outer wall of a continuously fed steel pipe as described in claim 2, characterized in that, Each slider assembly (112) includes a telescopic drive (1121) and a pressure block (1122), with the pressure block (1122) fixedly connected to the telescopic end of the telescopic drive (1121); The surface of the pressure block (1122) facing the steel pipe (1) is provided with an extrusion surface (116) that is adapted to the outer periphery shape of the steel pipe (1) and the shape of the strip steel.

4. The online ring-adding module for the outer wall of a continuously fed steel pipe as described in claim 3, characterized in that, A first cut-off portion (A) is formed on the pressure block (1122) on the downstream side of the release member (118), and a second cut-off portion (B) is formed on the downstream side of the release member (118); during the process of the corresponding slider assembly (112) switching from the disengagement position to the extrusion position, the first cut-off portion (A) and the second cut-off portion (B) can cut off the strip steel.

5. The online ring-adding module for the outer wall of a continuously fed steel pipe as described in claim 4, characterized in that, The slider assembly (112) consists of three sets, with two sets of slider assemblies (112) symmetrically positioned on both sides of the collar channel (114) in a vertical direction, suitable for extruding and bending the ends of the strip steel. Another set of slider assemblies (112) is located at the top of the collar channel (114) and is adapted to compress and bend the middle of the strip steel, and a first cut-off portion (A) is formed on the pressure block (1122) on the slider assembly (112).

6. The online ring-adding module for the outer wall of a continuously fed steel pipe as described in claim 1, characterized in that, Also includes: Axial sliding manipulator (40) is adapted to switch between collar position and flow position: When in the ring position, grab the steel pipe (1) and insert one end into the ring channel (114) of the ring device to perform the ringing operation; At the transfer position, grab the steel pipe (1) and remove one end of it from the collar channel (114).

7. The online ring-adding module for the outer wall of a continuously fed steel pipe as described in claim 1, characterized in that, Also includes: The wire feeding device (3) includes: Rack (12); Multiple feeding rollers (14) are connected to the frame (12) in parallel rotation and are distributed at intervals along the length of the strip steel. Two sets are symmetrically arranged along the length of the strip steel. Both sets of feeding rollers (14) are circumferentially provided with forming grooves (14a) that are adapted to the strip steel. The linear velocity of each feeding roller (14) corresponding to the position of the forming groove (14a) is equal. A conveying channel is formed between the two forming grooves (14a) symmetrical along the length of the strip steel. The conveying channel is connected to the inlet of the release component (118).

8. The online ring-adding module for the outer wall of a continuously fed steel pipe as described in claim 7, characterized in that, The wire feeding device (3) also includes: The spacing adjustment mechanism (16) is supported on the frame (12). The drive end of the spacing adjustment mechanism (16) is connected to the feeding roller (14) to adjust the spacing between the two sets of feeding rollers (14).

9. A method for adding rings to a steel pipe, characterized in that, The online ring-adding module for the outer wall of a continuously fed steel pipe as described in any one of claims 1-8, wherein the ring-adding method includes: S1: Make the axial position of the steel pipe (1) correspond to the position of the collar channel (114), and make the steel pipe (1) extend into the collar channel (114); S2: The strip steel is output to the inlet of the release member (118) through the wire feeding device (3); S3: When the length of the strip steel output from the outlet of the release element (118) reaches the threshold, the control slider assembly (112) switches from the disengagement position to the extrusion position to form the strip steel on the steel pipe (1). S4: Control the slider assembly (112) to switch to the disengaged position; S5: Make the steel pipe (1) exit the collar channel (114).

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