A laser group hole perforating machine for special-shaped steel structure provided with a pre-tightening type following clamp

Abstract

The present application relates to the technical field of steel structure processing, and discloses a special-shaped steel structure laser group hole perforating machine provided with a pre-tightening type following clamp, which comprises a base, a plurality of mounting rollers for placing special-shaped steel structures are rotatably connected to the base, the plurality of mounting rollers are distributed in an arc shape on the base and are connected through belt transmission, and a clamping mechanism is symmetrically connected to the mounting rollers. The special-shaped steel structure laser group hole perforating machine provided with the pre-tightening type following clamp can effectively solve the problems in the prior art, such as unstable clamping and positioning caused by non-planar form, easy production of slight displacement or rotation when processing end connecting holes, accumulation of errors between hole group space positions and theoretical coordinates, exceeding of tolerance to affect installation, continuous change of surface normal direction, oblique incidence of a light beam during laser cutting, deformation of a hole, oval cross section of the hole, non-ideal taper of the hole wall, and influence on installation quality of a connecting piece and node reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel structure processing, in particular to a special-shaped steel structure laser group hole perforating machine with a pre-tightening type following clamp. BACKGROUND

[0002] As a typical large-span space structure, the dome steel structure can realize the coverage of super-large space without internal columns, and is mainly composed of a main structure system, key connection nodes, a lower support system and an upper enclosure system, and is widely used in large public buildings.

[0003] Among them, the spherical latticed shell structure is formed by a plurality of bars arranged along the curved surface in a grid system, and the load is transmitted through the nodes, which can meet the demand of large-span coverage, and some projects will use pre-bent arc-shaped bars to make the building modeling and design more accurate, reduce the difficulty and cost of subsequent construction, but this also greatly increases the difficulty of component processing and manufacturing, especially in the precise machining link, the following technical bottlenecks exist:

[0004] 1. Because the arc-shaped bar is in a non-planar shape, it is difficult to establish a stable positioning reference during processing, and when processing the end connection hole, although laser processing relies on a numerical control system to achieve high-precision addressing, the curved surface and the clamp cannot be completely fitted during clamping and positioning, and the contact points will also change, which will easily cause the workpiece to move or rotate slightly during processing. This uncertainty will cause the actual spatial position of the hole group to deviate from the theoretical three-dimensional coordinates, and the cumulative error will exceed the design tolerance, affecting the accurate installation on site.

[0005] 2. The surface normal direction of the arc-shaped bar continuously changes with the position, and the laser beam will be incident on the workpiece surface at an inclined angle during laser cutting. This deviation of the incident angle will cause the hole contour to deform, the cross section of the hole to be elliptical, and the hole wall to form a non-ideal taper, which will seriously affect the installation quality and pre-tightening force of the connecting pieces such as high-strength bolts, and thus threaten the reliability of the node connection. SUMMARY

[0006] In view of the above shortcomings of the prior art, the present application provides a special-shaped steel structure laser group hole perforating machine with a pre-tightening type following clamp, which can effectively solve the problems in the prior art that the non-planar shape leads to unstable clamping and positioning, the end connection hole is prone to slight displacement or rotation during processing, the cumulative error occurs between the spatial position of the hole group and the theoretical coordinates, the tolerance is exceeded, the installation is affected, the surface normal direction continuously changes, the laser beam is inclined during laser cutting, the hole contour is deformed, the cross section is elliptical, the hole wall has a non-ideal taper, and the installation quality of the connecting pieces and the reliability of the node are affected.

[0007] To achieve the above purpose, the present application is realized by the following technical scheme:

[0008] The application provides a special-shaped steel structure laser group hole perforating machine with a pre-tightening type following clamp.

[0009] A base is provided with a plurality of mounting rollers for placing special-shaped steel structures, the mounting rollers are arranged in an arc shape on the base, a transmission roller is rotatably connected to the bottom of the base, the mounting rollers and the transmission roller are connected through belt transmission, the mounting rollers are symmetrically connected with clamping mechanisms, and the clamping mechanisms are connected with the transmission roller through a belt.

[0010] The clamping mechanism comprises two folding rods, the folding rods are rotatably sleeved on the shaft of the mounting roller, the folding rods are symmetrically distributed with the shaft of the mounting roller as the center, a connecting piece is rotatably sleeved on the shaft of the mounting roller, a connecting plate is fixedly connected to the connecting piece, the connecting plate is fixedly connected with the two folding rods through two arc-shaped spring rods, a supporting roller is rotatably connected to the corresponding folding rods in the two clamping mechanisms, and a positioning assembly for centering the special-shaped steel structure on the base is further connected to the connecting piece.

[0011] The shaft of the mounting roller is connected with a driving mechanism for synchronously approaching and moving away the symmetric clamping mechanisms, one end of the base is fixedly connected with a positioning plate, and the other end of the base is connected with a blanking mechanism for stably falling the special-shaped steel structure.

[0012] Further, the positioning assembly comprises a mounting seat fixedly connected with the connecting piece, a clamping roller rotatably connected to the connecting piece, press rollers fixedly connected to the upper end of the clamping roller through spring seats, and chamfers formed in the end portions of the two press rollers close to each other.

[0013] Further, the driving mechanism comprises a folding plate rotatably sleeved on the shaft of the mounting roller and rotatably connected with the lower end of the clamping roller, two bevel gears rotatably connected to the folding plate, a bevel gear in a horizontal position fixedly connected with the clamping roller, a bevel gear in a vertical position slidably connected with the mounting roller, a servo motor fixedly connected to the base, and a driving shaft of the servo motor in transmission connection with the shaft of the mounting roller at a starting machining point.

[0014] Further, a pushing plate is rotatably sleeved on the shaft of the mounting roller, an arc-shaped slot is formed through the pushing plate, a connecting rod is slidably connected in the arc-shaped slot, the connecting rod is fixedly connected with the connecting piece, lower ends of the pushing plates on the same side are fixedly connected with a horizontal plate, and a bidirectional moving assembly is connected to the two horizontal plates.

[0015] Further, a counterweight is fixedly sleeved on the supporting roller close to the positioning plate in the clamping mechanism, and a baffle is fixedly connected to the inner side wall of the base.

[0016] Further, a guide belt is connected to the folding rod close to the blanking mechanism and the mounting roller in the clamping mechanism through a bearing.

[0017] Further, the blanking mechanism comprises a mounting frame provided at the tail of the base, and two vertical sections of the mounting frame are provided with inclined grooves, and a buffer frame is slidably connected in the two inclined grooves through a buffer spring.

[0018] Compared with the prior art, the technical scheme provided by the application has the following beneficial effects:

[0019] 1. The arc-shaped base is provided with a plurality of mounting rollers and clamping mechanisms along the arc-shaped track, when the special-shaped steel structure with different curvatures is placed by the hoisting equipment, the self-gravity of the special-shaped steel structure is pressed on the supporting rollers, the folding lever mechanism is driven to rotate and open around the roller shaft of the mounting roller, until the workpiece arc surface is in stable contact with the mounting roller or the supporting roller. Even if part of the mounting rollers cannot contact the workpiece due to the mismatch of the curvature, the remaining mounting rollers and supporting rollers can also form stable multi-point support. This design does not need to replace or adjust the clamp for each different curvature of the rod, and a set of equipment can be compatible with special-shaped steel structures with different curvatures within a certain range, greatly improving the versatility of the equipment and the processing adaptability to diversified rods in complex dome structures.

[0020] 2. The connecting piece in the clamping mechanism is connected to the two symmetrical folding levers through the arc-shaped spring rod, and the exquisite geometric configuration ensures that the connecting piece is always located on the angle bisector of the two folding levers. Based on the three-point arc determination principle, the direction of the connecting piece is always the instantaneous curvature center of the current contact point of the special-shaped steel structure, and the cutting end of the laser perforating machine is processed in this direction, so that the laser beam is always perpendicular to the workpiece surface, realizing true normal machining, ensuring that the cut hole wall is a standard cylindrical shape, and the arc surface of the end face cutting is also very regular. This is very important for ensuring the connection reliability of the subsequent high-strength bolts, improving the assembly accuracy of the nodes and the safety of the overall steel structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0022] Figure 1 It is an overall structural schematic diagram of the embodiment of the present application.

[0023] Figure 2 It is a structural schematic diagram of the base, the pushing plate, the horizontal plate and the bidirectional moving assembly of the embodiment of the present application.

[0024] Figure 3The structural schematic view of the base, the mounting roller, the clamping mechanism and the driving mechanism of the embodiment of the present application;

[0025] Figure 4 The structural schematic view of the mounting roller, the clamping mechanism and the driving mechanism of the embodiment of the present application;

[0026] Figure 5 The planar schematic view of the embodiment of the present application; Figure 4

[0027] Figure 6 The structural schematic view of the driving mechanism of the embodiment of the present application;

[0028] Figure 7 The structural schematic view of the embodiment of the present application; Figure 3

[0029] Figure 8 The structural schematic view of the blanking mechanism of the embodiment of the present application.

[0030] The numbers in the figure respectively represent: 1, base; 11, mounting roller; 12, servo motor; 13, positioning plate; 2, clamping mechanism; 21, folding rod; 22, connecting piece; 23, connecting plate; 24, arc-shaped spring rod; 25, supporting roller; 26, positioning assembly; 261, mounting seat; 262, clamping roller; 263, spring seat; 264, pressing roller; 27, counterweight; 28, baffle; 29, guide belt; 3, driving mechanism; 31, folding plate; 32, bevel gear; 33, pushing plate; 331, arc-shaped groove; 34, connecting rod; 35, cross plate; 36, bidirectional moving assembly; 4, blanking mechanism; 41, mounting frame; 42, inclined chute; 43, buffer spring; 44, buffer frame. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0032] The present application will be further described below in combination with the embodiments.

[0033] Embodiment:

[0034] Please refer to Figures 1-8 , the present application provides a kind of technical scheme: a special-shaped steel structure laser group hole perforating machine with pre-tightening type accompanying clamp, comprising:

[0035] ​​The base 1 is arched in cross section, and a notch is formed through the position of the vertex to reserve sufficient space for the tool path of a laser cutting machine, a plurality of mounting rollers 11 for placing special-shaped steel structures are rotatably connected to the base 1, the plurality of mounting rollers 11 are arranged in an arc shape on the base 1, and a transmission roller is rotatably connected to the bottom of the base 1; the mounting rollers 11 and the transmission roller are connected through belt transmission, and a clamping mechanism 2 is symmetrically connected to the mounting rollers 11;

[0036] The clamping mechanism 2 comprises two folding rods 21 rotatably sleeved on the roller shaft of the mounting roller 11 and symmetrically distributed about the axis of the mounting roller 11, a connecting piece 22 rotatably sleeved on the roller shaft of the mounting roller 11, a connecting plate 23 fixedly connected to the connecting piece 22, and an arc-shaped spring rod 24 fixedly connecting the connecting plate 23 and the folding rod 21; the two symmetric folding rods 21 are always symmetrically distributed on the two sides of the connecting plate 23 under the elastic tension of the arc-shaped spring rod 24, so that the connecting piece 22 is always on the angle bisector of the two symmetric folding rods 21; corresponding folding rods 21 in the two clamping mechanisms 2 are rotatably connected to a supporting roller 25, and the connecting piece 22 is further connected to a positioning assembly 26 for centering the special-shaped steel structure on the base 1.

[0037] The roller shaft of the mounting roller 11 is connected to a driving mechanism 3 for synchronously approaching and moving away the symmetric clamping mechanisms 2, one end of the base 1 is fixedly connected to a positioning plate 13, and the other end of the base 1 is connected to a blanking mechanism 4 for stably falling the special-shaped steel structure.

[0038] Specifically, the construction of a large dome steel structure building relies on the accurate intersection of thousands of arc structural members in three-dimensional space, and the connecting points usually adopt complex bolt ball nodes, which requires that the end of each arc member must be accurately machined to form a hole for installing a high-strength bolt and cut into an arc shape matching the bolt ball node. This machining process faces significant technical challenges: the number of arc members to be machined is large, and the length and weight of the arc members are considerable. In addition, the radii of curvature of the members at different spatial positions of the dome also differ. Therefore, how to stably clamp and smoothly feed heavy arc members with different radii, and how to ensure that the laser beam always maintains the normal direction of the surface of the arc member during the machining process to form a standard cylindrical hole wall and ensure the strength and stability of the bolt connection, are technical problems that need to be solved in this field.

[0039] To address the above challenges, the present embodiment proposes a solution, a plurality of installation rollers 11 are rotatably installed on the base 1, and the plurality of installation rollers 11 are distributed along a preset arc-shaped track on the base 1 to fit the outer profile of the arc-shaped rod to be processed, and each installation roller 11 is symmetrically provided with a set of clamping mechanisms 2. At the beginning of the processing procedure, the arc-shaped rod to be processed is first placed on the installation roller 11 group on one side of the notch by hoisting equipment, and in the process of falling, it first contacts the supporting roller 25 in the clamping mechanism 2 and applies pressure to the supporting roller 25 through its own gravity, thereby driving a set of rod folding mechanism 21 to rotate adaptively around the roller shaft of the installation roller 11 (during which the arc-shaped spring rod 24 synchronously performs adaptive contraction), until the arc surface below the arc-shaped rod is in full contact with the roller surface of the installation roller 11, since a connecting piece 22 is always sleeved on the installation roller 11 and is designed to be constantly located on the angle bisector of the rod folding mechanism 21, therefore based on the geometric principle of three-point arc determination, the connecting piece 22 can always point to the instantaneous center of curvature of the arc-shaped rod.

[0040] When the arc-shaped rod is stably positioned on the installation roller 11 and separated from the hoisting equipment, it will slide a short distance along the arc-shaped track of the roller group from high to low due to its own gravity, until one end of it contacts a positioning plate 13, this step aims to establish an accurate starting point for the arc-shaped rod, then the driving mechanism 3 starts to operate: first, the symmetrically arranged clamping mechanisms 2 are driven to move synchronously and oppositely, so that the arc-shaped rod is accurately centered on the installation roller 11, then through the belt and pulley transmission system, all installation rollers 11 are driven to rotate synchronously and in the same direction, thereby conveying the arc-shaped rod to move smoothly in the longitudinal direction through friction, the cutting head of the laser perforating machine is set at the apex of the dome structure of the base 1, which has the ability to translate in the transverse plane and rotate 360 degrees around the axis of the arc-shaped rod, this multi-axis motion design can ensure that the cutting head is always in the radial direction of the arc-shaped rod when processing the arc surface, so as to ensure that the laser beam is always perpendicular to the surface of the arc-shaped rod, thereby ensuring that the processed hole wall is standard cylindrical, meeting the high-precision processing requirements.

[0041] It is worth noting that since the curvature radii of arc-shaped rods at different positions in the dome structure differ, when clamping some rods with specific radii, some installation rollers 11 may not be in direct contact with the arc surface below the rod, at this time, the supporting rollers 25 in the clamping mechanisms 2 connected to these non-contact installation rollers 11 will play the role of auxiliary support, the design of the system ensures that as long as at least two main installation rollers 11 maintain effective contact with the arc-shaped rod, the stability of the overall support can be guaranteed, this design endows the device with the ability to adaptively clamp and convey arc-shaped rods with different radii within a certain range.

[0042] The positioning assembly 26 comprises a mounting seat 261 fixedly connected with the connecting piece 22, a clamping roller 262 is rotatably connected with the connecting piece 22, a pressing roller 264 is fixedly connected with the roller shaft at the upper end of the clamping roller 262 through a spring seat 263, and chamfers are formed at the end portions of the two pressing rollers 264 close to each other, so as to be moved above the arc-shaped rod member and be pressed tightly when the two positioning assemblies 26 are close to each other.

[0043] The driving mechanism 3 comprises a folded plate 31 rotatably sleeved on the roller shaft of the mounting roller 11 and rotatably connected with the roller shaft at the lower end of the clamping roller 262, two intermeshing bevel gears 32 are rotatably connected with the folded plate 31, the bevel gear 32 in the horizontal position is fixedly connected with the clamping roller 262, and the bevel gear 32 in the vertical position is slidably connected with the mounting roller 11; a servo motor 12 is fixedly connected with the base 1, and the driving shaft of the servo motor 12 is in transmission connection with the roller shaft of the mounting roller 11 at the initial machining point.

[0044] Specifically, the feeding drive of the system is provided with initial power by a servo motor 12, the operation of the servo motor 12 first drives the driving mounting roller 11 directly connected therewith to rotate, the rotation of the driving mounting roller 11 transmits motion to the remaining driven mounting rollers 11 through a set of belt and pulley transmission system, so as to ensure that all the mounting rollers 11 realize synchronous rotation; while the mounting rollers 11 rotate, the bevel gears 32 connected therewith also rotate, the bevel gears 32 are engaged with the second bevel gears 32 arranged vertically and connected with the clamping rollers 262, so as to convert the horizontal rotation motion into the vertical rotation motion for driving the clamping rollers 262; since the length direction of the clamping rollers 262 is consistent with the length direction of the connecting piece 22 and always points to the center of the arc-shaped rod member, all the clamping rollers 262 rotate synchronously, and through the tangential friction force between the clamping rollers 262 and the surface of the arc-shaped rod member, the accurate longitudinal feeding control of the rod member is realized, so that the arc-shaped rod member moves along the arc-shaped track consistent with the length direction thereof to cooperatively complete the high-precision cutting operation with the external laser perforating machine.

[0045] It is worth noting that in order to realize the separation of the supporting function and the driving function, an independent roller sleeve is rotatably sleeved on the outer periphery of each mounting roller 11, and the function of the roller sleeve is limited to passively rolling supporting the arc-shaped rod member, which can freely rotate when the arc-shaped rod member feeds and will not generate additional frictional resistance to the longitudinal movement of the rod member. This design aims to avoid the interference of the supporting function to the active driving performance of the clamping rollers 262, so as to ensure the stability and accuracy of the feeding speed.

[0046] The roller shaft of the mounting roller 11 is rotatably sleeved with a push plate 33, an arc-shaped slot 331 is formed in the push plate 33, a connecting rod 34 is slidably connected in the arc-shaped slot 331, the connecting rod 34 is fixedly connected with the connecting piece 22, the lower ends of the push plates 33 on the same side are fixedly connected with a horizontal plate 35 through a short plate, and the two horizontal plates 35 are jointly connected with a bidirectional moving assembly 36 driven by a gas cylinder.

[0047] The supporting roller 25 close to the positioning plate 13 in the clamping mechanism 2 is fixedly sleeved with a counterweight 27, and the inner side wall of the base 1 is fixedly connected with a baffle 28.

[0048] The folding rods 21 close to the blanking mechanism 4 and the mounting roller 11 in the clamping mechanism 2 are jointly connected with a guide belt 29 through bearings.

[0049] Specifically, after the arc-shaped rod piece is placed on the mounting roller 11 through external hoisting equipment, the bidirectional moving assembly 36 driven by the gas cylinder makes the two horizontal plates 35 move towards each other, the movement is converted into the displacement of the push plate 33 to the middle part of the mounting roller 11 through the connecting plate 23 and the connecting rod 34 mechanism, and then the connecting piece 22 and the clamping roller 262 drive the arc-shaped rod piece to perform accurate centering and clamping operation, the supporting roller 25 close to the positioning plate 13 is fixedly sleeved with a counterweight 27, due to the existence of the counterweight 27, the mechanism is in a gravity imbalance in the initial state, so that the two supporting rollers 25 automatically tilt towards the end close to the positioning plate 13, until the roller shaft of one of the supporting rollers 25 abuts against the baffle 28, when the arc-shaped rod piece is placed, the pressing action of its weight on the mounting roller 11 will drive the supporting roller 25 to rotate adaptively through the connecting rod 34 mechanism, and make it contact with the arc surface below the mounting roller 11 in turn, so as to complete the preliminary positioning.

[0050] When the clamping roller 262 pushes the arc-shaped rod piece to move longitudinally to the side close to the blanking mechanism 4, due to the elastic tension of the arc-shaped spring rod 24 connected with the symmetrical folding rod 21 mechanism, the natural opening angle of the folding rod 21 mechanism is necessarily smaller than that of the folding rod 21 opened by the gravity pressing of the arc-shaped rod piece, if there is no special design, the rod piece will interfere with the next group of supporting rollers 25 not opened in the longitudinal movement, and cannot be accurately moved above the supporting rollers 25, the setting of the counterweight 27 solves this problem: due to the imbalance of the two supporting rollers 25 pre-tilting to one side, when the arc-shaped rod piece moves longitudinally, its front end will first pass the supporting roller 25 provided with the counterweight 27 and contact with a guide belt 29, and then move stably to the other supporting roller 25, the sequential contact in time sequence can guide the two supporting rollers 25 to open synchronously and smoothly, so as to ensure that the connecting piece 22 can always point to the instantaneous center of curvature of the arc-shaped rod piece in the whole movement process.

[0051] It is worth mentioning that, since the arc-shaped rod used in the dome steel structure generally has a long size, and its two ends generally need to be cut, the installation roller 11 and the clamping mechanism 2 arranged on the side close to the unloading mechanism 4 are of great significance. The setting can provide continuous and stable support throughout the movement of the arc-shaped rod, which is particularly important when processing the end of the arc-shaped rod close to the positioning plate 13. It effectively avoids the cantilever beam structure formed by the end of the rod, thereby significantly improving the overall rigidity of the clamping system and the stability of the processing process.

[0052] The unloading mechanism 4 comprises a mounting frame 41 arranged at the tail of the base 1, and two vertical sections are provided with inclined grooves 42, and the buffer frame 44 is slidably connected in the two inclined grooves 42 by the buffer spring 43.

[0053] Specifically, after the machining process is completed, the arc-shaped rod is driven by the clamping roller 262 to move to the position where the mounting frame 41 is located, so as to start the automatic unloading process. When the end of the arc-shaped rod close to the positioning plate 13 is moved out of the base 1, the end will be stably received by a buffer frame 44, and then the buffer frame 44 will be driven to slide downward along a preset inclined groove 42 track by the potential energy of the rod itself. The inclined groove 42 has a specific guide profile, which is designed to make the buffer frame 44 produce a longitudinal displacement opposite to the discharge direction of the arc-shaped rod while vertically descending. The trajectory of this compound motion can ensure that the buffer frame 44 can land on the ground together with the arc-shaped rod in coordination and smoothly, effectively avoiding damage to the component caused by free fall or collision during unloading, and can automatically reset after the buffer frame 44 and the arc-shaped rod are separated, ensuring the continuity of the processing process.

[0054] It is worth mentioning that the above-mentioned special-shaped steel structure laser group hole perforating machine with pre-tightening type follow-up clamp also has the following advantages:

[0055] Advantage one, the present embodiment distributes a plurality of installation rollers 11 and clamping mechanisms 2 along the arc trajectory on the arched base 1. When the special-shaped steel structure with different curvatures is placed by hoisting equipment, its own gravity will press on the supporting roller 25, driving the folding lever 21 mechanism to adaptively rotate and open around the roller shaft of the installation roller 11 until the arc surface of the arc-shaped rod is in stable contact with the installation roller 11 or the supporting roller 25. Even if part of the installation rollers 11 cannot contact the workpiece due to mismatched curvature, the remaining installation rollers 11 and supporting rollers 25 can still form stable multi-point support. This design does not need to replace or adjust the clamp for each arc-shaped rod with different curvature, and a set of equipment can be compatible with special-shaped steel structures with different curvatures within a certain range, greatly improving the versatility of the equipment and the processing adaptability to diversified arc-shaped rods in complex dome structures.

[0056] Second, the connecting piece 22 in the clamping mechanism 2 of the embodiment is connected with the two symmetrical folding rods 21 through the arc spring rod 24, and the ingenious geometric configuration ensures that the connecting piece 22 is always located on the angle bisector of the two folding rods 21. Based on the three-point arc determination principle, this means that the direction of the connecting piece 22 is always the instantaneous center of curvature of the current contact point of the arc-shaped rod, and the external laser perforating machine cutting end head processes along this direction, so as to ensure that the laser beam is always perpendicular to the workpiece surface, realizes the true sense of normal machining, ensures that the cut hole wall is a standard cylindrical shape, and the arc surface of the end face cutting is also very regular, which is crucial to ensure the connection reliability of the subsequent high-strength bolts, improve the assembly accuracy of the node, and the safety of the overall steel structure.

[0057] Third, in the absence of the counterweight 27, the clamping mechanism 2 on standby in front is in a contracted state due to the tension of the arc spring rod 24, which will interfere with the arc-shaped rod moving forward. The embodiment sets the counterweight 27 on the support roller 25 close to the positioning plate 13, so that it is inclined in the initial state. When the arc-shaped rod moves forward, its front end will first contact and pass through the support roller 25 with the counterweight 27 and the guide belt 29, and then contact the other support roller 25, thereby guiding the smooth and synchronous opening of the entire clamping mechanism 2. This design solves the complex dynamic interference problem in a simple and effective way, ensures the smooth transition of the arc-shaped rod between multiple clamping mechanisms 2, avoids impact and jamming, and ensures the continuity and stability of the machining process.

[0058] Fourth, for longer arc-shaped rods, both ends usually need to be machined. The embodiment arranges multiple mounting rollers 11 and clamping mechanisms 2 along the base 1, especially on the side close to the feeding mechanism 4. There are complete mounting rollers 11 and clamping mechanisms 2. When laser processing is performed on one end close to the positioning plate 13, the other end of the arc-shaped rod is still stably supported and clamped by the clamping mechanism 2 behind. This effectively avoids the formation of a "cantilever beam" structure due to the overlong extension of the workpiece end, thereby eliminating the possibility of sagging and vibration during processing, significantly improving the overall rigidity and stability of long and heavy arc-shaped rod processing, and ensuring the accuracy of remote processing.

[0059] Advantage five, the longitudinal feeding power of the arc-shaped rod is driven by the servo motor 12, the installation roller 11, and then transmitted to the clamping roller 262 through the bevel gear 32, and realized by the friction between the clamping roller 262 and the arc-shaped rod, and the weight of the arc-shaped rod is mainly supported by the freely rotating roller sleeve, which only provides passive rolling support and does not interfere with the additional friction force of the active drive of the clamping roller 262. The separation design of the driving and supporting functions ensures that the driving force applied by the servo motor 12 can be accurately and efficiently converted into the feeding motion of the workpiece, and the influence of the support friction change on the stability of the feeding speed is eliminated, thereby realizing higher precision position control.

[0060] Advantage six, after the machining is completed, the clamping roller 262 pushes the arc-shaped rod as a whole to the discharging mechanism 4, and after the end of the arc-shaped rod slides out, it is received by the buffer frame 44 on the mounting frame 41. Under the action of the gravity of the arc-shaped rod itself, the buffer frame 44 will smoothly slide downward along the chute 42. The special design of the chute 42 makes the buffer frame 44 produce a longitudinal displacement opposite to the discharging direction of the arc-shaped rod while descending. This design enables the heavy finished rod to land in a coordinated and buffered manner, effectively avoiding the bumps and damages caused by free fall, protecting the high-precision machining results. At the same time, the discharging process is completely automated, which improves the production efficiency and guarantees the safety of the operators.

[0061] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A laser group-hole drilling machine for irregularly shaped steel structures equipped with a pre-tightening traveling clamp, characterized in that, include: A base (1) is rotatably connected to a plurality of mounting rollers (11) for placing irregular steel structures. The plurality of mounting rollers (11) are arranged in an arc shape on the base (1). A transmission roller is rotatably connected to the bottom of the base (1). The mounting rollers (11) and the transmission roller are connected by a pulley and a belt. A clamping mechanism (2) is symmetrically connected to the mounting rollers (11). The clamping mechanism (2) includes a folding rod (21), two folding rods (21) are rotatably sleeved on the roller shaft of the mounting roller (11), the two folding rods (21) are symmetrically distributed with the axis of the mounting roller (11) as the center, a connecting piece (22) is rotatably sleeved on the roller shaft of the mounting roller (11), a connecting plate (23) is fixedly connected to the connecting piece (22), the connecting plate (23) is fixedly connected to the two folding rods (21) respectively through two arc-shaped spring rods (24), a support roller (25) is rotatably connected to the corresponding folding rods (21) in the two clamping mechanisms (2), and a positioning component (26) is also connected to the connecting piece (22). Among them, the roller shaft of the mounting roller (11) is connected to a driving mechanism (3) that makes the symmetrical clamping mechanism (2) move closer and further away synchronously. One end of the base (1) is fixedly connected to a positioning plate (13), and the other end of the base (1) is connected to a feeding mechanism (4) that makes the irregular steel structure fall smoothly. The positioning component (26) includes a mounting base (261), which is fixedly connected to the connector (22). A clamping roller (262) is rotatably connected to the connector (22). The roller shaft at the upper end of the clamping roller (262) is fixedly connected to a pressing roller (264) through a spring seat (263). The two pressing rollers (264) have chamfers at their close ends. The outer circumference of the mounting roller (11) is fitted with an independent roller sleeve. A push plate (33) is rotatably fitted on the roller shaft of the mounting roller (11). An arc groove (331) is opened through the push plate (33). A connecting rod (34) is slidably connected in the arc groove (331). The connecting rod (34) is fixedly connected to the connecting piece (22). The lower ends of the push plates (33) on the same side are fixedly connected to a horizontal plate (35). A bidirectional moving assembly (36) driven by a cylinder is connected to both horizontal plates (35).

2. A laser group hole drilling machine for irregular steel structures equipped with a pre-tightening traveling clamp as described in claim 1, characterized in that: The driving mechanism (3) includes a folding plate (31), which is rotatably sleeved on the roller shaft of the mounting roller (11) and rotatably connected to the roller shaft at the lower end of the clamping roller (262). Two meshing bevel gears (32) are rotatably connected on the folding plate (31). The horizontal bevel gear (32) is fixedly connected to the clamping roller (262), and the vertical bevel gear (32) is slidably connected to the mounting roller (11). A servo motor (12) is fixedly connected on the base (1), and the drive shaft of the servo motor (12) is connected to the roller shaft of the mounting roller (11) at the starting processing point.

3. A laser group-hole drilling machine for irregularly shaped steel structures equipped with a pre-tightening traveling clamp according to claim 1, characterized in that: In the clamping mechanism (2), a counterweight (27) is fixedly sleeved on the support roller (25) near the positioning plate (13), and a baffle (28) is fixedly connected to the inner side wall of the base (1).

4. A laser group hole drilling machine for irregular steel structures equipped with a pre-tightening traveling clamp as described in claim 1, characterized in that: In the clamping mechanism (2), the folding bar (21) near the unloading mechanism (4) and the mounting roller (11) are connected by a guide belt (29) through a bearing.

5. A laser group drilling machine for irregularly shaped steel structures equipped with a pre-tightening traveling clamp according to claim 1, characterized in that: The feeding mechanism (4) includes a mounting frame (41), which is located at the tail of the base (1) and has inclined grooves (42) on both vertical sections. A buffer frame (44) is slidably connected to the two inclined grooves (42) through a buffer spring (43).

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