A double-drive synchronous centering and clamping device for thin-walled cylinder segment and control method thereof

Abstract

This application discloses a dual-drive synchronous centering clamping device and control method for thin-walled cylindrical segments, relating to the field of machining technology. The device includes a support platform, three sets of first clamping mechanisms, and three sets of second clamping mechanisms. By setting the first and second clamping mechanisms, the outer and inner walls of the thin-walled cylindrical segment can be clamped simultaneously, thereby improving the clamping and limiting accuracy and preventing excessive deformation of the thin-walled cylindrical segment in the circumferential direction. Simultaneously, the first clamping module on the outer side can be vertically spliced ​​to clamp and limit the upper and lower sides of the reinforcing ring, avoiding the location of the reinforcing ring, effectively solving the problem of reinforcing ring welding. Therefore, the dual-drive synchronous centering clamping device for thin-walled cylindrical segments in this embodiment can alleviate or even solve the clamping deformation problem of thin-walled cylindrical segments and improve processing efficiency.

Description

Technical Field

[0001] This application relates to the field of machining technology, and in particular to a dual-drive synchronous centering clamping device and control method for thin-walled cylindrical sections. Background Technology

[0002] Thin-walled cylindrical sections are widely used in aerospace, aviation, pressure vessels, and large pipeline structures. A typical structure consists of several reinforcing rings arranged axially along the outer periphery, each ring being fixed by circumferential welding. Because the wall thickness of these sections is typically only a few millimeters to a dozen millimeters, their radial stiffness is low, classifying them as typical weakly rigid thin-walled components. The clamping process during the reinforcing ring welding presents multiple interrelated technological challenges.

[0003] Firstly, the clamping force directly causes deformation of the cylinder wall. Traditional clamping methods often use rigid internal supports or external pressure clamps. When radial or axial clamping forces are applied, thin-walled cylinders are prone to localized indentations or overall ellipticization. After removing the clamps, residual elastic recovery and plastic deformation together lead to out-of-tolerance roundness, resulting in uneven circumferential distribution of the fit gap between the inner wall of the reinforcing ring and the outer wall of the cylinder. During subsequent welding, the uneven gap causes differences in heat conduction, leading to poor consistency in weld penetration and width, and making it easy to produce undercut, incomplete fusion, or even cracks. The fatigue strength and sealing performance of the joint are difficult to guarantee.

[0004] Secondly, there is the coupling effect of welding heat input and clamping constraints. During continuous circumferential welding, the weld metal expands due to heat, but the surrounding cold base material and rigid clamps form a strong constraint boundary, preventing the thermal expansion from being released freely and forcing it to transform into compressive plastic strain. During the cooling stage, the restricted shrinkage results in high tensile residual stress. This stress field, combined with the initial deformation caused by clamping, not only causes the cylindrical section to twist and warp, but also causes the relative positions of adjacent welded reinforcing rings to drift, violating the design-specified ring spacing tolerance and affecting the overall load-bearing performance.

[0005] Secondly, there is spatial interference between the clamping structure itself and the reinforcing ring. The reinforcing ring protrudes from the cylinder wall with a certain radial height and axial width. If the clamping claws or positioning blocks are placed near the ring to be welded, they will directly block the path of the welding torch, making it impossible to complete a continuous weld. If the reinforcing ring area is deliberately avoided, the support point will inevitably be far away from the weld, leaving the welding area in a suspended state, with weaker local rigidity and a significantly increased tendency to become unstable when heated. Multiple reinforcing rings divide the outer wall of the cylinder into several effective clamping sections, further compressing the freedom of clamp layout and making the selection of reliable support points extremely difficult.

[0006] Furthermore, to address the aforementioned deformation and interference issues, on-site adjustments often rely on manual addition or removal of shims or temporary installation of auxiliary support rings. However, this method is inefficient, the results vary from person to person, and consistency is poor, making it difficult to match the cycle time requirements of automated welding production lines. Repeated trial assembly and recalibration can also scratch or damage the protective layer on the cylinder surface, increasing rework time and costs.

[0007] Therefore, how to effectively suppress the clamping deformation of thin-walled cylindrical sections while ensuring the welding accuracy of the reinforcing ring, avoid spatial interference between the fixture and the reinforcing ring, and ensure convenient and reliable clamping operation is a practical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] This application aims to at least solve one of the technical problems existing in the prior art. To this end, in a first aspect, this application proposes a dual-drive synchronous centering clamping device for thin-walled cylindrical sections, which can alleviate or even solve the problem of clamping deformation of thin-walled cylindrical sections and improve processing efficiency.

[0009] Secondly, this application proposes a control method for the above-mentioned dual-drive synchronous centering and clamping device for thin-walled cylindrical sections.

[0010] According to an embodiment of the first aspect of this application, a dual-drive synchronous centering clamping device for thin-walled cylindrical sections includes: Support platform; Three sets of first clamping mechanisms are disposed on the support platform. The three sets of first clamping mechanisms are evenly distributed along the circumferential direction and are used to clamp the outer wall of the thin-walled cylindrical section from the outside. Each first clamping mechanism is provided with a first clamping module. The first clamping module has a first clamping wall facing the workpiece. A splicing column is provided on the side of the first clamping module away from the first clamping wall. The splicing column extends along the axial direction of the thin-walled cylindrical section. Three sets of second clamping mechanisms are disposed on the support platform. The three sets of second clamping mechanisms are evenly distributed along the circumferential direction and are arranged with the same center as the first clamping mechanism. They are used to clamp the inner wall of the thin-walled cylindrical section from the inside. The second clamping mechanism is provided with a second clamping module. The second clamping module has a second clamping wall facing the workpiece. The first clamping module is configured such that at least one first clamping module can be spliced ​​upward along the axial direction through the splicing column, and the first clamping walls of the two spliced ​​first clamping modules have a predetermined distance along the axial direction, the predetermined distance being configured to accommodate the reinforcing ring on the outer periphery of the thin-walled cylindrical section.

[0011] The thin-walled cylindrical section double-drive synchronous centering clamping device according to the first aspect of this application has at least the following beneficial effects: The dual-drive synchronous centering clamping device for thin-walled cylindrical segments in this embodiment, by setting up a first clamping mechanism and a second clamping mechanism, can simultaneously clamp the outer and inner walls of the thin-walled cylindrical segment, thereby improving clamping and limiting accuracy and preventing excessive deformation of the thin-walled cylindrical segment in the circumferential direction. Simultaneously, the first clamping module on the outer side can be vertically spliced ​​to clamp and limit the upper and lower sides of the reinforcing ring, and avoid the location of the reinforcing ring, effectively solving the problem of reinforcing ring welding. Therefore, the dual-drive synchronous centering clamping device for thin-walled cylindrical segments in this embodiment can alleviate or even solve the clamping deformation problem of thin-walled cylindrical segments and improve processing efficiency.

[0012] According to some embodiments of this application, the first clamping module includes: The main body is constructed as an arc-shaped structure, and the first clamping wall is disposed on the side of the main body facing the thin-walled cylindrical segment; A support portion is connected to the side of the main body away from the first clamping wall. Along the length direction of the main body, the support portion is connected to the midpoint of the main body and extends radially along the first clamping wall. A splicing base is vertically connected to the side of the support part away from the main body. Splicing columns are respectively provided on both sides of the upper end face of the splicing base, and splicing holes are respectively provided on both sides of the lower end face of the splicing base. The splicing holes are coaxially distributed with the splicing columns and can be inserted into the splicing columns.

[0013] According to some embodiments of this application, the first clamping module further includes an adjustment part, wherein an adjustment post is provided protruding from the upper end of the adjustment part and an adjustment hole is provided concavely at the lower end; the size of the adjustment post is the same as that of the splicing post, and the size of the adjustment hole is the same as that of the splicing hole. The first clamping module is further configured to increase the predetermined spacing by superimposing one or more of the adjustment parts on the splicing column.

[0014] According to some embodiments of this application, the first clamping mechanism is further provided with a first driving module, which is configured to drive the first clamping module to move.

[0015] According to some embodiments of this application, the second clamping module has two mounting posts at the bottom and two mounting holes at the top. The mounting holes are coaxially distributed with the mounting posts, and the mounting holes are configured to allow the mounting posts to be inserted. The second clamping module is configured such that at least one second clamping module can be spliced ​​upward along the axial direction via the mounting post.

[0016] According to some embodiments of this application, the second clamping mechanism is further provided with a second driving module, the second driving module is configured to drive the second clamping module to move, the second driving module is provided with a mounting base, the mounting base is rotatably provided with two flip plates, the flip plates are provided with insertion holes, and the insertion holes are configured to allow the mounting post to be inserted; The flap has a first state and a second state. In the first state, the flap is horizontally attached to the mounting base and is flush with or concave relative to the upper surface of the mounting base. In the second state, the flap protrudes vertically from the mounting base, making the insertion hole vertically upward.

[0017] According to some embodiments of this application, the mounting base is further provided with a reset member, which is disposed between the mounting base and the flip plate, and is used to apply a force to the flip plate to rotate from the second state to the first state.

[0018] According to some embodiments of this application, the first clamping mechanism further includes a circumferential limiting part, the first clamping wall is provided with a through groove along the arc direction, the upper and lower sides of the through groove are provided with limiting steps, and the circumferential limiting part passes through the through grooves of at least two circumferentially distributed first clamping modules to fit the outer wall of the thin-walled cylindrical section in the circumferential direction.

[0019] According to some embodiments of this application, a convergence component is provided between the circumferential limiting portion and the first clamping module, and the convergence component is configured to control the circumferential limiting portion to move relative to the first clamping module in an arc direction.

[0020] According to the control method of the internal and external dual-drive synchronous centering clamping device for thin-walled cylindrical segments according to the second aspect of this application, wherein the device is any of the above-described embodiments of the internal and external dual-drive synchronous centering clamping device for thin-walled cylindrical segments, the method includes the following steps: Place the thin-walled cylindrical section onto the support platform; The first clamping mechanism and the second clamping mechanism are controlled to retract and open from their initial positions to the first position, respectively. At this time, the first clamping module and the second clamping module are not in contact with the thin-walled cylindrical segment. According to the installation position of the reinforcing ring, the first clamping module is spliced ​​on the first clamping mechanism, and the second clamping module is spliced ​​on the second clamping mechanism; Move the reinforcing ring to the corresponding installation position of the thin-walled cylindrical section, control the first clamping module and the second clamping module to fit against the outer wall and inner wall of the thin-walled cylindrical section respectively, and then weld the reinforcing ring.

[0021] The control method of the internal and external dual-drive synchronous centering and clamping device for thin-walled cylindrical sections according to the second aspect of this application has at least the following beneficial effects: The control method of this embodiment can clamp the outer and inner walls of the thin-walled cylindrical section, thereby improving the clamping and limiting accuracy and preventing excessive deformation of the thin-walled cylindrical section in the circumferential direction. At the same time, the first clamping module clamps and limits the upper and lower sides of the reinforcing ring and avoids the location of the reinforcing ring, which can effectively solve the problem of welding the reinforcing ring and improve processing efficiency.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and some of these additional aspects and advantages will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0023] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of an overall structure of this application; Figure 2 This is a schematic diagram of one structure of the first clamping mechanism in this application; Figure 3 This is an exploded view of one structure of the first clamping mechanism in this application; Figure 4 This is a schematic diagram of one structure of the second clamping mechanism in this application; Figure 5 This is an exploded view of one structure of the second clamping mechanism in this application; Figure 6 This is a schematic diagram of one structure of the circumferential limiting part in this application. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0028] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the 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.

[0029] Reference Figures 1 to 6 This application provides an embodiment of a dual-drive synchronous centering clamping device for thin-walled cylindrical segments, comprising a support platform 100, three sets of first clamping mechanisms 200, and three sets of second clamping mechanisms 300. The three sets of first clamping mechanisms 200 are disposed on the support platform 100 and are evenly distributed along the circumferential direction, used to clamp the outer wall of the thin-walled cylindrical segment 400 from the outside. Each first clamping mechanism 200 is provided with a first clamping module 201, which has a first clamping wall 2011 facing the workpiece. A splicing post 2015 is provided on the side of the first clamping module 201 facing away from the first clamping wall 2011, and the splicing post 2015 extends axially along the thin-walled cylindrical segment 400. Three sets of second clamping mechanisms 300 are disposed on the support platform 100. These three sets of second clamping mechanisms 300 are evenly distributed along the circumference and are concentrically positioned with the first clamping mechanism 200. They are used to clamp the inner wall of the thin-walled cylindrical section 400 from the inside. Each second clamping mechanism 300 is provided with a second clamping module 301, which has a second clamping wall facing the workpiece. The first clamping module 201 is configured such that at least one first clamping module 201 can be axially spliced ​​upwards via splicing posts 2015. The first clamping walls 2011 of the spliced ​​two first clamping modules 201 have a predetermined axial distance, which is configured to accommodate the reinforcing ring on the outer periphery of the thin-walled cylindrical section 400.

[0030] Thin-walled cylindrical sections (400) are widely used in aerospace, aviation, pressure vessels, and large pipeline structures. Their typical structure consists of several reinforcing rings arranged axially along the outer periphery, each fixed by circumferential welding. Because the wall thickness of these sections is typically only a few millimeters to a dozen millimeters, their radial stiffness is low, making them typical weakly rigid thin-walled components. Traditional clamping methods often employ rigid internal supports or external pressure clamps. When radial or axial clamping forces are applied, the thin-walled cylinder is prone to localized indentations or overall ellipticization. After removing the clamps, residual elastic recovery and plastic deformation together lead to out-of-tolerance roundness, resulting in uneven circumferential distribution of the fit gap between the inner wall of the reinforcing rings and the outer wall of the cylinder. During subsequent welding, this uneven gap causes differences in heat conduction, leading to poor consistency in weld penetration and width, and increasing the likelihood of undercut, incomplete fusion, and even cracks. Consequently, the fatigue strength and sealing performance of the joint are difficult to guarantee.

[0031] The thin-walled cylindrical section component dual-drive synchronous centering clamping device of this application embodiment, by setting three sets of first clamping mechanisms 200 and three sets of second clamping mechanisms 300 evenly distributed along the circumferential direction, can simultaneously clamp the outer wall and inner wall of the thin-walled cylindrical section component 400. The outer wall clamping and inner wall clamping are performed synchronously, so that the thin-walled cylindrical section component 400 is subjected to a uniform radial clamping force in the circumferential direction, thereby effectively suppressing local concavity and overall elliptic deformation of the thin-walled cylindrical section component 400 during clamping, and improving the clamping and limiting accuracy. Simultaneously, at least one first clamping module 201 can be spliced ​​upwards along the axial direction by splicing columns 2015. The first clamping walls 2011 of the spliced ​​two first clamping modules 201 have a predetermined spacing that can accommodate a reinforcing ring, so that the reinforcing ring is precisely located in the gap between the two first clamping modules 201. In this way, the first clamping module 201 can both clamp and limit the upper and lower sides of the reinforcing ring, and completely avoid the location of the reinforcing ring, so as not to block the welding torch from traveling along the circumferential seam, thus realizing continuous welding around the entire ring. On this basis, combined with the support of the inner second clamping module 301 for the cylinder wall, the welding area obtains sufficient local rigidity, effectively suppressing the instability and deformation caused by welding heat input.

[0032] Therefore, the dual-drive synchronous centering clamping device for thin-walled cylindrical segments in this application can alleviate or even solve the problem of clamping deformation of thin-walled cylindrical segments 400, while avoiding spatial interference between the clamp and the reinforcing ring, thus improving processing efficiency and welding quality.

[0033] Reference Figure 2 and Figure 3In some embodiments, to achieve stable splicing and reliable clamping of the first clamping module 201, the first clamping module 201 is constructed to include a main body 2012, a support 2013, and a splicing seat 2014. The main body 2012 is constructed as an arc-shaped structure, the curvature of which matches the curvature of the outer peripheral wall of the thin-walled cylindrical section 400. The first clamping wall 2011 is disposed on the side of the main body 2012 facing the thin-walled cylindrical section 400, for forming surface contact with the outer wall of the cylindrical section to ensure uniform distribution of clamping force. The support 2013 is connected to the side of the main body 2012 away from the first clamping wall 2011. Along the length direction of the main body 2012, the support 2013 is connected at the midpoint of the main body 2012 and extends radially along the first clamping wall 2011. Positioning the support portion 2013 at the midpoint of the length of the main body 2012 allows the clamping force to be evenly transmitted through the main body 2012 to both ends of the first clamping wall 2011, preventing the main body 2012 from deflecting or warping due to uneven force distribution. The splicing base 2014 is vertically connected to the side of the support portion 2013 opposite to the main body 2012. Splicing posts 2015 are respectively provided on both sides of the upper end face of the splicing base 2014, and splicing holes are respectively provided on both sides of the lower end face of the splicing base 2014. The splicing holes are coaxially distributed with the splicing posts 2015 and allow the splicing posts 2015 to be inserted. Through the matching structure of the splicing column 2015 and the splicing hole, multiple first clamping modules 201 can be reliably spliced ​​together along the axial direction. The main body 2012 of each first clamping module 201 after splicing is distributed at intervals along the axial direction, and the interval between two adjacent main body parts 2012 is the predetermined spacing for accommodating the reinforcing ring.

[0034] Understandably, the splicing post 2015 and the splicing hole can use a clearance fit or an interference fit, or a locking structure can be set. For example, an elastic buckle can be set on the side of the splicing post 2015, and a corresponding groove can be set on the inner wall of the splicing hole. When the splicing post 2015 is inserted into the splicing hole, the buckle automatically engages with the groove to lock it in place. This quick-connect locking structure enables the rapid splicing and disassembly of the first clamping module 201, improving the adaptability of the device to different reinforcing ring positions and the ease of operation. The two splicing posts 2015 can maintain the stability of the first clamping module and fix the angle between the two first clamping modules.

[0035] Reference Figure 3In some embodiments, to further improve the adaptability of the first clamping module 201 to the position of the reinforcing ring, the first clamping module 201 further includes an adjustment part 203. The upper end of the adjustment part 203 has a protruding adjustment post, and the lower end has a recessed adjustment hole. The size of the adjustment post is the same as that of the splicing post 2015, and the size of the adjustment hole is the same as that of the splicing hole. The first clamping module 201 is also configured to increase the predetermined distance between the first clamping walls 2011 of the two first clamping modules 201 by superimposing one or more adjustment parts 203 on the splicing post 2015. That is, when the axial width of the reinforcing ring on the outer periphery of the thin-walled cylindrical section 400 is large, or when multiple adjacent reinforcing rings need to be clamped simultaneously, an appropriate number of adjustment parts 203 can be superimposed between the two first clamping modules 201, and the predetermined distance can be increased by the axial height of the adjustment parts 203, thereby enabling the device to adapt to reinforcing rings of different widths and different distances. The matching method between the adjusting column and the adjusting hole is the same as the matching method between the splicing column 2015 and the splicing hole, ensuring the reliability of the connection and the ease of splicing between the adjusting part 203 and the first clamping module 201. Furthermore, if the initial predetermined spacing between the two first clamping modules 201 does not match the position of the reinforcing ring, the adjusting part 203 can be used to adjust the position of the predetermined spacing until it matches the position of the reinforcing ring.

[0036] Reference Figure 3 In some embodiments, to achieve automated movement and clamping of the first clamping module 201, the first clamping mechanism 200 is further provided with a first drive module 202. The first drive module 202 is configured to drive the first clamping module 201 to move. Specifically, the first drive module 202 can be a cylinder, a hydraulic cylinder, a motor screw mechanism, or other linear drive elements. The first drive modules 202 of the three sets of first clamping mechanisms 200 are independently or synchronously controlled, enabling the three sets of first clamping modules 201 to move radially synchronously towards the center or centrifugally, achieving uniform clamping or release of the outer wall of the thin-walled cylindrical section 400. When it is necessary to clamp thin-walled cylindrical sections 400 with different diameter specifications, only the stroke of the first drive module 202 needs to be controlled to adapt to different cylinder diameters, without the need to change the clamps, thus improving the versatility of the device. Meanwhile, by controlling the output force of the first drive module 202, the clamping force of the first clamping module 201 on the cylinder wall can be precisely adjusted, avoiding plastic deformation of the thin-walled cylinder due to excessive clamping force, and also avoiding insecure clamping due to insufficient clamping force.

[0037] Reference Figure 4 and Figure 5In some embodiments, to enable the second clamping module 301 to be spliced ​​axially to accommodate reinforcing rings of different heights, the second clamping module 301 has two mounting posts 3011 at its bottom and two mounting holes at its top. The mounting holes are coaxially distributed with the mounting posts 3011 and are configured to allow the mounting posts 3011 to be inserted. The second clamping module 301 is configured such that at least one second clamping module 301 can be spliced ​​axially upwards via the mounting posts 3011. Through the cooperation of the mounting posts 3011 and the mounting holes, multiple second clamping modules 301 can be sequentially spliced ​​axially, corresponding to the splicing structure of the first clamping module 201. The spliced ​​multiple second clamping modules 301, each supporting the corresponding axial position of the inner wall of the cylinder, form an inner-outer paired clamping relationship with the outer first clamping module 201, further improving the clamping rigidity and stability of the thin-walled cylinder section 400. The splicing method of the second clamping module 301 is similar to that of the first clamping module 201. It can also adopt quick-connect structure such as snap-locking, which makes it convenient for operators to make flexible adjustments on site according to the arrangement of the reinforcing ring.

[0038] Reference Figure 5 In some embodiments, to facilitate the quick installation and removal of the second clamping module 301, the second clamping mechanism 300 is further provided with a second drive module 302. The second drive module 302 is configured to drive the second clamping module 301 to move. The second drive module 302 is provided with a mounting base 3021, and the mounting base 3021 has two rotatably mounted flaps 3023. Each flap 3023 has an insertion hole configured to allow the mounting post 3011 to be inserted. The flaps 3023 have a first state and a second state. In the first state, the flaps 3023 are horizontally attached to the mounting base 3021 and remain flush with or recessed relative to the upper surface of the mounting base 3021. In this state, the flaps 3023 do not occupy additional space, facilitating the storage of the second clamping module 301 and the initial state management of the device. In the second state, the flip plate 3023 protrudes vertically from the mounting base 3021, making the insertion hole vertically upward. At this time, the mounting post 3011 of the second clamping module 301 can be inserted vertically downward into the insertion hole of the flip plate 3023, enabling rapid installation of the second clamping module 301 on the mounting base 3021. By switching between the first and second states using the flip plate 3023, rapid connection and separation between the second clamping module 301 and the second drive module 302 are achieved, simplifying the assembly operation of the second clamping module 301 and improving the clamping efficiency of the device.

[0039] In this embodiment, the flip plate 3023 can switch to the first state when transporting the thin-walled cylindrical section 400, and switch to the second state when clamping, which facilitates the picking, placing and transferring of the thin-walled cylindrical section 400.

[0040] Furthermore, in some embodiments, the mounting base 3021 is also provided with a reset member, which is disposed between the mounting base 3021 and the flip plate 3023, and is used to apply a force to the flip plate 3023 to rotate from the second state to the first state. When the second clamping module 301 is pulled out from the insertion hole of the flip plate 3023, the reset member automatically drives the flip plate 3023 to rotate from the vertical second state to the horizontal first state, so that the flip plate 3023 is neatly housed in the upper end surface of the mounting base 3021 without manual reset. This not only improves the operating efficiency, but also avoids the flip plate 3023 protruding from the mounting base 3021 when not in use, which could cause personnel to bump into it or interfere with other components. The reset member can be in the form of a torsion spring, tension spring, or compression spring, etc., and the specific type can be selected according to the installation space and the magnitude of the reset force.

[0041] Furthermore, the included angle, distribution position, and rotation direction of the two flip plates 3023 satisfy the following: when the second clamping module 301 is inserted into the two flip plates 3023, it can prevent the two flip plates 3023 from automatically resetting. There are various ways to achieve this, such as the two flip plates 3023 resetting rotation directions being opposite, or the included angle of the two flip plates 3023 being an obtuse angle. Those skilled in the art can flexibly set these parameters as needed.

[0042] Reference Figure 6 In some embodiments, to further improve the clamping uniformity and circumferential positioning accuracy of the first clamping mechanism 200 on the outer wall of the thin-walled cylindrical section 400, the first clamping mechanism 200 further includes a circumferential positioning portion 500. The first clamping wall 2011 has a through-groove along the arc direction, and positioning steps are provided on the upper and lower sides of the through-groove. The circumferential positioning portion 500 passes through the through-groove of at least two circumferentially distributed first clamping modules 201 to conform to the outer wall of the thin-walled cylindrical section 400 in the circumferential direction. The circumferential positioning portion 500 can be constructed as a flexible strip structure, which passes through the through-groove of multiple first clamping modules 201 and surrounds the outer periphery of the thin-walled cylindrical section 400. When the first clamping module 201 moves radially into position, the circumferential positioning portion 500 tightens circumferentially under the constraint of the through-groove, conforming to the outer wall surface of the thin-walled cylindrical section 400. The limiting steps on both sides of the through groove limit the axial position of the circumferential limiting part 500, preventing axial slippage during tightening and ensuring it remains in the predetermined axial position to cooperate with the first clamping wall 2011 for clamping. Through the circumferential limiting part 500, the first clamping mechanism 200 can provide not only radial clamping force but also circumferential binding force, further improving the fit and clamping stability of the thin-walled cylindrical section 400.

[0043] Specifically, in some embodiments, the circumferential limiting part 500 is constructed as a steel strip, and the thin-walled cylindrical section 400 is bound and limited circumferentially by the material properties of the steel strip.

[0044] In some embodiments, the circumferential limiting portion 500 is constructed as a polymer structure with a certain thickness, utilizing its own material properties to balance the flexibility requirements of circumferential fitting and the rigidity requirements of limiting.

[0045] Understandably, the slot can limit and guide the circumferential limiting part 500, and combined with the rigidity of the circumferential limiting part 500 itself, it can achieve adaptive fitting of the thin-walled cylindrical section 400.

[0046] In some embodiments, the circumferential limiting portion 500 is configured as a fully rigid structure to limit the thin-walled cylindrical section 400 of a specific diameter.

[0047] In some embodiments, a tightening assembly is provided between the circumferential limiting portion 500 and the first clamping module 201 to achieve automated tightening and loosening of the circumferential limiting portion 500. The tightening assembly is configured to control the circumferential limiting portion 500 to move relative to the first clamping module 201 in an arcuate direction. The tightening assembly can be a motor-driven winding mechanism, one end of which is connected to the end of the circumferential limiting portion 500. The tightening or loosening of the circumferential limiting portion 500 is achieved by the forward or reverse rotation of the motor. The tightening assembly can also be a cylinder-driven or manually operated traction mechanism. The tightening and loosening of the circumferential limiting portion 500 can be synchronized with the radial movement of the first clamping module 201, realizing automated and precise control of the clamping action, reducing manual operation, and improving clamping efficiency and consistency.

[0048] In some embodiments, limiting plates 501 are respectively provided at both ends of the outer peripheral surface of the circumferential limiting part 500. A clamping block 502 is detachably installed on the first clamping module 201, and an adjusting bolt 503 is installed on the clamping block 502. In use, before the first clamping module 201 is attached to the thin-walled cylindrical section 400, the circumferential limiting part 500 is first inserted into the through groove, and then the clamping block 502 is installed. After the first clamping module 201 is in place, the limiting plate 501 is pushed by the adjusting bolt 503 to adjust the circumferential limiting part 500 to be tightened so that it is attached to the thin-walled cylindrical section 400, and the adjusting bolt 503 is used to prevent the circumferential limiting part 500 from loosening.

[0049] In some embodiments, elastic layers are provided on both sides of the first clamping module 201 and the second clamping module 301 along the arc direction near their respective sides to fit cylindrical segments of different sizes. Alternatively, removable liners are designed on the adjacent sides of the two components to fit cylindrical segments of different sizes.

[0050] The following describes a specific embodiment of a thin-walled cylindrical section internal and external dual-drive synchronous centering clamping device according to one of the present application.

[0051] Reference Figures 1 to 5 The device in this embodiment includes a support platform 100, the upper surface of which is a horizontal reference plane for supporting the thin-walled cylindrical section 400. Three sets of first clamping mechanisms 200 and three sets of second clamping mechanisms 300 are mounted on the support platform 100. The three sets of first clamping mechanisms 200 and three sets of second clamping mechanisms 300 are concentrically distributed. The three sets of first clamping mechanisms 200 and the three sets of second clamping mechanisms 300 are evenly arranged in the circumferential direction. Along the radial direction of the circumference, the first clamping mechanisms 200 and the second clamping mechanisms 300 are opposite each other to ensure that the thin-walled cylindrical section 400 is simultaneously subjected to clamping force in the wall thickness direction.

[0052] The first clamping mechanism 200 includes a first drive module 202 and a first clamping module 201. The first drive module 202 is mounted on the support platform 100, and its output end extends radially. The first drive module 202 includes a first transmission screw 2022, a first slide block 2021, and a first geared motor. The first transmission screw 2022 passes radially through the support platform 100 and is rotatable relative to the support platform 100 about its own axis. The first geared motor is connected to the first transmission screw 2022 to drive its rotation. The first slide block 2021 is slidably mounted on the support platform 100 and is threadedly engaged with the first transmission screw 2022. Two columns 20211 are provided at the upper end of the first slide block 2021.

[0053] The first clamping module 201 includes a main body 2012, a support 2013, a splicing seat 2014, and splicing columns 2015. The main body 2012 is an arc-shaped plate structure, with its inner arc surface forming a first clamping wall 2011 for fitting against the outer wall of the thin-walled cylindrical section 400. The support 2013 is a rectangular block structure, with one end fixedly connected to the midpoint of the outer arc surface of the main body 2012 and the other end fixedly connected to the splicing seat 2014. The splicing seat 2014 is a rectangular plate structure, with a width greater than that of the support 2013. Cylindrical splicing columns 2015 are respectively provided on both sides of the upper end surface of the splicing seat 2014, and the splicing columns 2015 extend upward along the axial direction. The lower end face of the splicing base 2014 is provided with round splicing holes on both sides. The axis of the splicing hole coincides with the axis of the splicing column 2015, and the diameter of the splicing hole is adapted to the diameter of the splicing column 2015, so that the splicing column 2015 can be inserted into the splicing hole to form a tight fit.

[0054] Furthermore, the dimensions of the 20211 column are compatible with the dimensions of the splicing holes.

[0055] When a reinforcing ring needs to be welded to the outer periphery of the thin-walled cylindrical section 400, the operator, based on the axial position of the reinforcing ring on the cylindrical section, first assembles a first clamping module 201 on the first slide 2021, and then assembles the corresponding first clamping module 201 on the splicing seat 2014. For example, if the reinforcing ring is located in the middle of the cylindrical section, an upper first clamping module 201 needs to be spliced ​​on the base first clamping module 201, so that the reinforcing ring is exactly within the predetermined distance between the main bodies 2012 of the two first clamping modules 201. If multiple reinforcing rings need to be welded on the cylindrical section, multiple first clamping modules 201 can be sequentially spliced ​​on the base first clamping module 201, with a spacing between every two adjacent first clamping modules 201 to accommodate the reinforcing ring.

[0056] The second clamping mechanism 300 includes a second drive module 302 and a second clamping module 301. The second drive module 302 is mounted on the support platform 100, and its output end extends radially. The second drive module 302 includes a second transmission screw 3022, a second geared motor, and a mounting base 3021. The second transmission screw 3022 passes radially through the support platform 100 and is rotatable relative to the support platform 100 about its own axis. The second geared motor is connected to the second transmission screw 3022 to drive its rotation. The mounting base 3021 is slidably mounted on the support platform 100 and threadedly engaged with the second transmission screw 3022. Two flaps 3023 are rotatably mounted on the mounting base 3021. The flaps 3023 are rotatably connected to the mounting base 3021 by pins, and a torsion spring is sleeved at the pin as a reset element. In the initial state, the flaps 3023 are horizontally attached to the upper surface of the mounting base 3021 under the action of the torsion springs. When the second clamping module 301 needs to be installed, the operator flips the flap 3023 upwards to a vertical position, with the insertion holes on the flap 3023 facing upwards. The two mounting posts 3011 at the bottom of the second clamping module 301 are then inserted into the insertion holes of the two flaps 3023, thus completing the installation of the second clamping module 301. The top of the second clamping module 301 has mounting holes coaxial with the mounting posts 3011, for splicing the upper second clamping module 301 when needed.

[0057] During clamping, the first drive module 202 drives the first clamping module 201 to move radially centripetally, causing the first clamping wall 2011 to adhere to the outer wall of the thin-walled cylindrical section 400. Simultaneously, the second drive module 302 drives the second clamping module 301 to move radially centrifugally, causing the second clamping wall to adhere to the inner wall of the thin-walled cylindrical section 400. This synchronous clamping ensures that the cylindrical wall of the thin-walled cylindrical section 400 experiences uniform pressure in both directions along its thickness, effectively suppressing localized depressions and overall ellipticization of the cylindrical wall. When welding the reinforcing ring, the welding torch travels along the annular gap between the reinforcing ring and the cylindrical wall. Since the axial region corresponding to the location of the reinforcing ring is precisely within the predetermined distance between the two first clamping modules 201, the welding torch's path is completely unobstructed by the first clamping modules 201, enabling continuous welding around the ring. Furthermore, because the inner side of this axial region is supported by the second clamping module 301, the welding area has sufficient local rigidity and will not experience instability or deformation due to welding heat input.

[0058] Furthermore, the first and second clamping mechanisms 200 and 300, which are radially opposite, have various configurations for the first and second transmission screws 2022 and 3022. These include vertically staggered arrangements, horizontally staggered arrangements, and coaxial arrangements. Those skilled in the art can flexibly configure these configurations as needed, and no further limitations are imposed here. Moreover, the three sets of first clamping mechanisms 200, the three sets of second clamping mechanisms 300, and the first and second clamping mechanisms 300 can all be synchronously driven and controlled by a control center.

[0059] Furthermore, the first clamping mechanism 200 and the second clamping mechanism 300 are each equipped with a press-fit positioning sensor on their respective clamping surfaces. For example, when the first clamping mechanism 200 approaches the thin-walled cylindrical section 400, the detection end of the press-fit positioning sensor will first abut against the thin-walled cylindrical section 400. When fully pressed in, the first clamping wall 2011 adheres to the thin-walled cylindrical section 400, at which point the press-fit positioning sensor is triggered, the control center receives feedback, and controls the first clamping mechanism 200 to stop. This ensures that the first clamping mechanism 200 and the second clamping mechanism 300 will not damage the workpiece.

[0060] It is understood that the internal and external dual-drive synchronous centering clamping device for thin-walled cylindrical segments in this application is not limited to the specific structural forms described above. Any technical solution that employs internal and external synchronous clamping and allows the outer clamping module to be axially spliced ​​to avoid the reinforcing ring is within the protection scope of this application. The number of the first clamping module 201 and the second clamping module 301 is not limited to three sets. It can be set to four, six, or more sets depending on the diameter of the thin-walled cylindrical segment 400 and the clamping force requirements. However, the three-set solution has a better balance in terms of positioning accuracy and structural simplification.

[0061] The embodiments of this application also propose a control method for a dual-drive synchronous centering clamping device for thin-walled cylindrical sections, which employs any of the above embodiments of the dual-drive synchronous centering clamping device for thin-walled cylindrical sections, and includes the following steps: The thin-walled cylindrical section 400 is placed on the support platform 100. In this step, the operator or the automatic loading and unloading system hoists or moves the thin-walled cylindrical section 400 to be processed to the central area of ​​the support platform 100, so that the axis of the cylindrical section is approximately coincident with the common center of the first clamping mechanism 200 and the second clamping mechanism 300.

[0062] The first clamping mechanism 200 and the second clamping mechanism 300 are controlled to retract and open from their initial positions to the first position, respectively. In the first position, neither the first clamping module 201 nor the second clamping module 301 is in contact with the thin-walled cylindrical segment 400; that is, appropriate gaps are maintained between the first clamping module 201 and the outer wall of the cylindrical segment, and between the second clamping module 301 and the inner wall of the cylindrical segment. The purpose of this step is to reserve operating space for subsequent splicing operations and precise centering, and to avoid accidental collisions between the clamping modules and the cylindrical segment during the splicing process.

[0063] Based on the installation position of the reinforcing rings, first clamping modules 201 are spliced ​​onto the first clamping mechanism 200, and second clamping modules 301 are spliced ​​onto the second clamping mechanism 300. Specifically, the operator calculates and determines the number of first clamping modules 201 to be spliced ​​and the predetermined spacing between each module based on the number and axial position of the reinforcing rings to be welded to the outer periphery of the thin-walled cylindrical section 400. For each reinforcing ring, a first clamping module 201 is set above and below the reinforcing ring's axial position, so that the reinforcing ring is exactly located in the gap between the main bodies 2012 of the two first clamping modules 201. Correspondingly, a corresponding number and height of second clamping modules 301 are spliced ​​onto the second clamping mechanism 300, so that the second clamping modules 301 correspond to the first clamping modules 201 in axial position, forming paired clamping supports.

[0064] The reinforcing ring is moved to the corresponding installation position on the thin-walled cylindrical section 400. The first clamping module 201 and the second clamping module 301 are controlled to fit against the outer and inner walls of the thin-walled cylindrical section 400, respectively, before welding the reinforcing ring. In this step, the reinforcing ring is first fitted onto the outer periphery of the thin-walled cylindrical section 400 and moved axially to the predetermined installation position. Then, the first drive module 202 and the second drive module 302 are controlled to move synchronously, causing the first clamping module 201 to move radially centripetally to fit against the outer wall of the cylindrical section, and the second clamping module 301 to move radially centrifugally to fit against the inner wall of the cylindrical section. The synchronous clamping inside and outside fixes the cylindrical section and the reinforcing ring in the correct position. Subsequently, the welding torch continuously welds along the circumferential seam between the reinforcing ring and the cylindrical section. Since the first clamping module 201 has axially limited the reinforcing ring by clamping it on the upper and lower sides, and the internal and external clamping ensures the roundness of the cylindrical section, the fitting gap between the reinforcing ring and the cylindrical wall is uniform during the welding process, and the weld quality is effectively guaranteed.

[0065] The control method of this embodiment, through synchronous internal and external clamping and the splicable design of the first clamping module 201, can uniformly clamp the outer and inner walls of the thin-walled cylindrical section 400, improve clamping and limiting accuracy, and avoid excessive deformation of the thin-walled cylindrical section 400 in the circumferential direction. Simultaneously, the first clamping module 201, by clamping and limiting the upper and lower sides of the reinforcing ring and avoiding the location of the reinforcing ring, can effectively solve the problem of spatial interference between the fixture and the welding torch during the welding process of the reinforcing ring, improving processing efficiency and welding quality.

[0066] It is understandable that the step of assembling the first clamping module 201 and the second clamping module 301 in the above control method can also be completed in advance before placing the thin-walled cylindrical section 400 onto the support platform 100. For example, the arrangement of the reinforcing rings can be determined in advance according to the process documents, and the assembly of all clamping modules can be completed during the equipment preparation stage. During clamping, it is only necessary to place the cylindrical section and control the drive module to clamp it. This method is suitable for mass production of products of the same specification and can further improve the production line cycle time.

[0067] In some embodiments, the control method further includes, after welding is completed, controlling the first clamping mechanism 200 and the second clamping mechanism 300 to reset to their initial positions. That is, the first clamping module 201 moves radially centrifugally to release the outer wall, and the second clamping module 301 moves radially centripetally to release the inner wall. Then, the flip plate 3023 is automatically flipped to the first state by the reset component of the flip plate 3023. Finally, the welded thin-walled cylindrical section 400 is removed from the support platform 100. The entire clamping and welding process effectively suppresses the deformation of the thin-walled cylindrical section 400 and accurately positions the welding position of the reinforcing ring. The roundness of the processed cylindrical section meets the design requirements, and the position tolerance of the reinforcing ring meets the process standards.

[0068] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A dual-drive synchronous centering clamping device for thin-walled cylindrical sections, characterized in that, include: Support platform; Three sets of first clamping mechanisms are disposed on the support platform. The three sets of first clamping mechanisms are evenly distributed along the circumferential direction and are used to clamp the outer wall of the thin-walled cylindrical section from the outside. Each first clamping mechanism is provided with a first clamping module. The first clamping module has a first clamping wall facing the workpiece. A splicing column is provided on the side of the first clamping module away from the first clamping wall. The splicing column extends along the axial direction of the thin-walled cylindrical section. Three sets of second clamping mechanisms are disposed on the support platform. The three sets of second clamping mechanisms are evenly distributed along the circumferential direction and are arranged with the same center as the first clamping mechanism. They are used to clamp the inner wall of the thin-walled cylindrical section from the inside. The second clamping mechanism is provided with a second clamping module. The second clamping module has a second clamping wall facing the workpiece. The first clamping module is configured such that at least one first clamping module can be spliced ​​upward along the axial direction through the splicing column, and the first clamping walls of the two spliced ​​first clamping modules have a predetermined distance along the axial direction, the predetermined distance being configured to accommodate the reinforcing ring on the outer periphery of the thin-walled cylindrical section.

2. The thin-walled cylindrical section double-drive synchronous centering clamping device according to claim 1, characterized in that, The first clamping module includes: The main body is constructed as an arc-shaped structure, and the first clamping wall is disposed on the side of the main body facing the thin-walled cylindrical segment; A support portion is connected to the side of the main body away from the first clamping wall. Along the length direction of the main body, the support portion is connected to the midpoint of the main body and extends radially along the first clamping wall. A splicing base is vertically connected to the side of the support part away from the main body. Splicing columns are respectively provided on both sides of the upper end face of the splicing base, and splicing holes are respectively provided on both sides of the lower end face of the splicing base. The splicing holes are coaxially distributed with the splicing columns and can be inserted into the splicing columns.

3. The thin-walled cylindrical section internal and external dual-drive synchronous centering clamping device according to claim 2, characterized in that, The first clamping module further includes an adjustment part, wherein an adjustment post is provided protruding at the upper end of the adjustment part and an adjustment hole is provided concave at the lower end. The size of the adjustment post is the same as that of the splicing post, and the size of the adjustment hole is the same as that of the splicing hole. The first clamping module is further configured to increase the predetermined spacing by superimposing one or more of the adjustment parts on the splicing column.

4. The thin-walled cylindrical section internal and external dual-drive synchronous centering clamping device according to claim 1, characterized in that, The first clamping mechanism is further provided with a first driving module, which is configured to drive the first clamping module to move.

5. The thin-walled cylindrical section internal and external dual-drive synchronous centering clamping device according to claim 1, characterized in that, The second clamping module has two mounting posts at the bottom and two mounting holes at the top. The mounting holes are coaxially distributed with the mounting posts, and the mounting holes are configured to allow the mounting posts to be inserted. The second clamping module is configured such that at least one second clamping module can be spliced ​​upward along the axial direction via the mounting post.

6. The thin-walled cylindrical section internal and external dual-drive synchronous centering clamping device according to claim 5, characterized in that, The second clamping mechanism is further provided with a second drive module, which is configured to drive the second clamping module to move. The second drive module is provided with a mounting base, which is rotatably provided with two flip plates. The flip plates are provided with insertion holes, which are configured to allow the mounting post to be inserted. The flap has a first state and a second state. In the first state, the flap is horizontally attached to the mounting base and is flush with or concave relative to the upper surface of the mounting base. In the second state, the flap protrudes vertically from the mounting base, making the insertion hole vertically upward.

7. The thin-walled cylindrical section internal and external dual-drive synchronous centering clamping device according to claim 6, characterized in that, The mounting base is also provided with a reset member, which is disposed between the mounting base and the flip plate, and is used to apply a force to the flip plate to rotate from the second state to the first state.

8. The thin-walled cylindrical section internal and external dual-drive synchronous centering clamping device according to claim 1, characterized in that, The first clamping mechanism further includes a circumferential limiting part. The first clamping wall is provided with a through groove along the arc direction. Limiting steps are provided on the upper and lower sides of the through groove. The circumferential limiting part passes through the through grooves of at least two circumferentially distributed first clamping modules to fit the outer wall of the thin-walled cylindrical section in the circumferential direction.

9. The thin-walled cylindrical section internal and external dual-drive synchronous centering clamping device according to claim 8, characterized in that, A convergence component is provided between the circumferential limiting part and the first clamping module. The convergence component is configured to control the circumferential limiting part to move relative to the first clamping module in an arc direction.

10. A control method for a dual-drive synchronous centering clamping device for thin-walled cylindrical segments, wherein the device is the dual-drive synchronous centering clamping device for thin-walled cylindrical segments as described in any one of claims 1 to 10, characterized in that... Includes the following steps: Place the thin-walled cylindrical section onto the support platform; The first clamping mechanism and the second clamping mechanism are controlled to retract and open from their initial positions to the first position, respectively. At this time, the first clamping module and the second clamping module are not in contact with the thin-walled cylindrical segment. According to the installation position of the reinforcing ring, the first clamping module is spliced ​​on the first clamping mechanism, and the second clamping module is spliced ​​on the second clamping mechanism; Move the reinforcing ring to the corresponding installation position of the thin-walled cylindrical section, control the first clamping module and the second clamping module to fit against the outer wall and inner wall of the thin-walled cylindrical section respectively, and then weld the reinforcing ring.

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