Double-end guardrail laser welding machine and guardrail weldment fixing mechanism thereof

Abstract

The utility model relates to the field of guardrail welding processing, and provides a double-end guardrail laser welding machine and a guardrail weldment fixing mechanism thereof, which comprise the guardrail weldment fixing mechanism arranged at the top of a horizontal rack, the laser welding device comprises two groups of five-axis servo modules, a laser and a laser welding head; the two five-axis servo modules of the same structure are symmetrically arranged on the left side and the right side of the horizontal rack, and each five-axis servo module comprises an X-axis servo module, a Y-axis servo module, a Z-axis servo module and a bidirectional servo rotating mechanism. And the welding wire feeding mechanism is arranged on the Z-axis servo module. The multi-dimensional arc welding device is characterized in that each laser welding head has five motion dimensions under the clamping of two groups of five-axis servo modules, and is compatible with a multi-dimensional arc welding function; an integral structure is adopted, so that the structure is stable, the integral structure does not shake during high-speed operation, and the working efficiency is high; the welding wire feeding mechanism is arranged on the Y-axis servo module and synchronously moves with the laser welding head in the three-dimensional space, and welding wire supply is stable and smoother.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of guardrail welding processing especially a double -end guardrail laser welding machine. BACKGROUND

[0002] Common guardrails mainly include house guardrails, municipal guardrails and power facility guardrails, ladders, etc., and the general guardrails have shape characteristics such as rectangle, that is, after a plurality of guardrail cross arm materials are arranged at intervals, the two ends thereof are respectively welded on the corresponding guardrail edge materials to form a rectangle, parallelogram or trapezoid structure. The guardrail cross arm material and the guardrail edge material generally use iron, stainless steel, aluminum alloy and other strip-shaped metals as raw materials. During welding, a plurality of guardrail cross arm materials are arranged at intervals on the guardrail edge material, and the guardrail cross arm materials are respectively welded on the guardrail edge material. At present, most of the welding of guardrails is carried out by manual argon arc welding, gas shielded welding and handheld laser welding, which is labor-intensive and low in efficiency. In order to improve the work efficiency, some manufacturers use a single or two robots to replace manual welding. However, the efficiency of single robot welding is not high, although the efficiency of two robots welding is improved, the device structure is loose and complex, and the cost is high. If a high-end robot with precision durability is selected, the overall cost is higher, which is not conducive to popularization. If a general type stacking robot is selected for guardrail welding, the welding precision is poor, and it is difficult to meet the positioning precision requirement of welding. Moreover, the programming and control of general robots are relatively complex at present, and the process conversion or equipment has small abnormalities, which requires professional technical personnel to solve. Ordinary production workers are difficult to carry out corresponding work. Moreover, the structure is not stable enough, and the overall structure is prone to shaking during high-speed operation, so it can only run at low speed, which affects the work efficiency.

[0003] For example, the patent document CN 108942023 A discloses a guardrail welding equipment. The equipment mainly solves the problems of high labor intensity, low efficiency, irregular welding effect and unattractive overall welding appearance when manually welding guardrails with the same shape but different specifications and sizes. The equipment mainly includes a sliding rail mechanism, a wire feeding mechanism and a welding mechanism. The wire feeding mechanism is installed on a three-degree-of-freedom plane robot arm, and a reel is arranged at one end above the arm. A wire feeding hose is connected at one end, and a push-pull wire feeding mode is adopted for wire feeding action, which is suitable for occasions with a large working range. The end of the wire feeding hose is provided with a wire outlet, and a welding gun is arranged side by side. The equipment is an automatic device, which can realize guardrail welding by replacing different tooling for different specifications and sizes of guardrails. Since the guardrail material is generally made of carbon steel, gas shielded welding is used. On the other hand, two three-degree-of-freedom plane robots are used to simultaneously weld the built guardrail from left to right, realize automatic wire feeding into the specified welding position, and the welding guns arranged side by side weld the guardrail and the base material. The welding trajectory of the three-degree-of-freedom plane robot is controlled by programming, the welding effect is consistent, and the efficiency is improved. However, the guardrail welding equipment disclosed in the patent document also has some problems: (1) the welding gun has insufficient degrees of freedom and no joint degree of freedom, which can only weld the top side or bottom side splicing position, and cannot weld the side seam of the guardrail cross arm material and the guardrail edge material splicing position; (2) the welding mechanism is a split type, i.e., the three-degree-of-freedom plane robot is not fixed with the sliding rail mechanism (equivalent to a rack), which has poor stability and is prone to shaking during high-speed operation, which is not conducive to improving work efficiency; (3) the split structure leads to a loose and not compact structure, resulting in a large volume and a large occupied space, causing space waste; and (4) the wire feeding distance is far, which is prone to jamming and causes the welding work to stop in the middle. Practical new type content

[0004] The guardrail welding equipment overcomes the above technical problems in the prior art, and provides a double-head guardrail laser welding machine with higher performance and lower cost and a guardrail welding piece fixing mechanism. The technical solutions adopted are as follows:

[0005] The guardrail welding piece fixing mechanism of the double-head guardrail laser welding machine comprises a left positioning mechanism and a right positioning mechanism, and the left positioning mechanism and the right positioning mechanism are arranged in a left-right opposite manner on the top of the horizontal rack of the double-head guardrail laser welding machine; the left positioning mechanism or the right positioning mechanism comprises a side pressing clamping type strip, an edge material bottom support plate strip and a cross arm material bottom support plate strip; the side pressing clamping type strip for clamping the guardrail edge material from the outside, the edge material bottom support plate strip for supporting the guardrail edge material from below and the cross arm material bottom support plate strip for supporting the guardrail edge material from below are arranged in a left or right side of the top of the horizontal rack in a sequence from outside to inside; in terms of height, the height of the edge material bottom support plate strip and the height of the cross arm material bottom support plate strip are both lower than the height of the side pressing clamping type strip;

[0006] A plurality of edge material clamping cylinders are arranged on the left side of the horizontal rack, and the edge material clamping cylinders are uniformly distributed and arranged on the horizontal rack, and the edge material clamping cylinders are arranged outside the side pressing clamping type strip on the left side and are in transmission connection with the side pressing clamping type strip on the left side.

[0007] Further, the top of the edge material bottom support plate strip and the top of the cross arm material bottom support plate strip are provided with positioning adjustment longitudinal grooves with a slot opening smaller than a slot body, respectively an edge material head and tail positioning block and a cross arm material head and tail positioning block, the edge material head and tail positioning block is arranged on the edge material bottom support plate groove and is used for limiting the head or tail of the guardrail edge material, and the cross arm material head and tail positioning block is arranged on the cross arm material bottom support plate groove and is used for limiting the head or tail of the guardrail cross arm material.

[0008] A double-head guardrail laser welding machine, comprising a horizontal rack, a laser welding device and a guardrail welding piece fixing mechanism as described above, wherein,

[0009] The laser welding device is arranged on the horizontal rack;

[0010] The laser welding device comprises two groups of five-axis servo modules and a laser welding head;

[0011] The two groups of five-axis servo modules are identically structured and are symmetrically arranged on the left and right sides of the horizontal rack and are movable relative to the horizontal rack, and the two groups of five-axis servo modules are respectively a left five-axis servo module and a right five-axis servo module, and each group of five-axis servo modules comprises an XYZ three-axis servo module and a bidirectional servo rotating mechanism;

[0012] The XYZ three-axis servo module is arranged on the top left side of the horizontal rack and is used for adjusting the three-dimensional space position of the bidirectional servo rotating mechanism above the horizontal rack;

[0013] The bidirectional servo rotating mechanism is arranged on the XYZ three-axis servo module and is located above the guardrail welding piece fixing mechanism and is used for adjusting the rotation angle of the laser welding head in the horizontal direction and the vertical direction;

[0014] The laser welding head is arranged on the bidirectional servo rotating mechanism and above the guardrail welding piece fixing mechanism, and is used for welding the interconnected welding pieces;

[0015] The XYZ three-axis servo module comprises an X-axis servo module, a Y-axis servo module, a Z-axis servo module and a welding wire feeding mechanism for conveying the welding wire to the welding seam;

[0016] The X-axis servo module is vertically arranged on the left side or the right side of the horizontal rack and can move forward and backward;

[0017] The Y-axis servo module is suspended above the left half or the right half of the horizontal rack and can slide left and right, and one end of the Y-axis servo module is fixed on the X-axis servo module;

[0018] The Z-axis servo module is suspended above the left half or the right half of the horizontal rack and can slide up and down, and one end of the Z-axis servo module is fixed on the Y-axis servo module;

[0019] The bidirectional servo rotating mechanism is suspended above the left half or the right half of the horizontal rack, and the upper end of the bidirectional servo rotating mechanism is fixed on the lower end of the Z-axis servo module;

[0020] The welding wire feeding mechanism is arranged on the Z-axis servo module.

[0021] Further, the X-axis servo module comprises an X-axis vertical arm, an X-axis horizontal arm, an X-axis forward and backward sliding assembly, an X-axis sliding frame, an X-axis sliding block, an X-axis sliding rail and an X-axis servo motor; wherein,

[0022] The X-axis horizontal arm is arranged on the top of the X-axis vertical arm and suspendedly extends towards the upper side of the horizontal rack; the Y-axis servo module is arranged on the X-axis horizontal arm;

[0023] The X-axis sliding frame comprises an X-axis upper sliding plate, an X-axis lower sliding plate and an X-axis slag blocking plate; the X-axis upper sliding plate and the X-axis lower sliding plate are arranged one above the other on the outer side of the horizontal rack; the X-axis slag blocking plate is arranged between the X-axis upper sliding plate and the X-axis lower sliding plate;

[0024] The X-axis sliding rail comprises an X-axis upper sliding rail and an X-axis lower sliding rail; the X-axis upper sliding rail is arranged on the outer side of the X-axis upper sliding plate, and the X-axis lower sliding rail is arranged on the outer side of the X-axis lower sliding plate;

[0025] The X-axis sliding block comprises an X-axis upper sliding block and an X-axis lower sliding block; the X-axis upper sliding block is slidably arranged on the outer side of the X-axis upper sliding rail, and the X-axis lower sliding block is slidably arranged on the X-axis lower sliding rail;

[0026] The outer side of the X-axis upper sliding block is provided with an X-axis upper sliding plate, and the outer side of the X-axis upper sliding plate is provided with an X-axis upper sliding horizontal arm;

[0027] The upper side of the X-axis lower sliding block is provided with an X-axis lower sliding plate;

[0028] The X-axis vertical arm is vertically arranged on the X-axis lower sliding plate, and the X-axis vertical arm is fixed to the outer end of the X-axis upper sliding cross arm on the side of the horizontal machine frame;

[0029] The X-axis front and rear sliding assembly comprises an X-axis front and rear sliding rack and an X-axis front and rear sliding gear; the X-axis front and rear sliding rack is arranged on the outer side of the X-axis upper sliding plate and below the X-axis upper sliding rail;

[0030] The tail of the X-axis servo motor is fixed to the outer side of the X-axis vertical arm, the head of the X-axis servo motor passes through the X-axis upper sliding plate and is fixed to the X-axis upper sliding plate; the X-axis front and rear sliding gear is arranged on the output shaft of the head of the X-axis servo motor and is engaged with the X-axis front and rear sliding rack.

[0031] Further, the Y-axis servo module comprises a Y-axis sliding seat, a Y-axis sliding drive assembly and a Y-axis vertical sliding plate;

[0032] The Y-axis sliding seat is horizontally arranged on the X-axis cross arm, and the Y-axis sliding drive assembly for driving the Y-axis vertical sliding plate to slide left and right outside the Y-axis sliding seat is arranged in the Y-axis sliding seat;

[0033] The Y-axis vertical sliding plate is slidably arranged on the front side of the Y-axis sliding seat; and the Z-axis servo module is vertically arranged outside the Y-axis vertical sliding plate;

[0034] The top of the Y-axis sliding seat is provided with a Y-axis sliding groove, and the upper part of the Y-axis vertical sliding plate is transmissionally connected with the Y-axis sliding drive assembly through the Z-axis sliding groove.

[0035] Further, the Z-axis servo module comprises a Z-axis sliding seat, a Z-axis screw rod assembly, a Z-axis sliding block and a Z-axis motor; the Z-axis sliding block is vertically arranged outside the Y-axis vertical sliding plate, the Z-axis sliding seat is vertically arranged outside the Z-axis sliding block, the Z-axis screw rod assembly is arranged in the Z-axis sliding seat, and the Z-axis motor is arranged on the upper end of the Z-axis sliding seat and is transmissionally connected with one end of the screw rod of the Z-axis screw rod assembly;

[0036] The left side or the right side of the Z-axis sliding seat is provided with a Z-axis sliding groove, the Z-axis sliding block is slidably arranged on the Z-axis sliding seat and is fixedly connected with the screw nut of the Z-axis screw rod assembly through the Z-axis sliding groove, and the bidirectional servo rotating mechanism is fixed to the lower end of the Z-axis sliding seat.

[0037] Further, the welding wire feeding mechanism comprises a wire disc corner inclined arm and a step wire feeder, both of which are arranged on the Z-axis sliding seat; the lower arm of the wire disc corner inclined arm is arranged on the front side of the Z-axis sliding seat, the upper arm of the wire disc corner inclined arm is inclined above the rear side of the Z-axis sliding seat, the wire disc shaft is horizontally arranged on the left side or the right side of the upper end of the wire disc corner inclined arm, and the wire disc shaft is provided with a wire disc lock pin at the outer end to prevent the wire disc from falling off;

[0038] The step wire feeder is arranged at the front corner of the wire disc corner inclined arm, and the position of the step wire feeder is lower than that of the wire disc shaft.

[0039] Further, the bidirectional servo rotating mechanism comprises a vertical servo rotating mechanism capable of driving the laser welding head to rotate in a vertical plane and a horizontal servo rotating mechanism capable of driving the vertical servo rotating mechanism to rotate in a horizontal plane, the horizontal servo rotating mechanism is suspended at the lower end of the Z-axis servo module, and the vertical servo rotating mechanism is suspended at the lower end of the horizontal servo rotating mechanism.

[0040] Further, the horizontal servo rotating mechanism comprises a horizontal rotating vertical plate, a horizontal rotating fork-shaped horizontal plate and a C-axis servo motor, the horizontal rotating vertical plate is vertically arranged at the middle position of the horizontal rotating fork-shaped horizontal plate, the rear side of the horizontal rotating vertical plate is fixedly arranged at the front side of the Z-axis servo module, the rear part of the horizontal rotating fork-shaped horizontal plate is arranged at the bottom side of the horizontal rotating vertical plate, and the front half end of the horizontal rotating fork-shaped horizontal plate is suspended and protrudes forward; the C-axis servo motor driving the vertical servo rotating mechanism to rotate in the horizontal plane is vertically arranged at the fork-shaped opening at the right end of the horizontal rotating fork-shaped horizontal plate.

[0041] Further, the vertical servo rotating mechanism comprises a vertical rotating horizontal plate, a vertical rotating fork-shaped vertical plate and an A-axis servo motor; the vertical rotating horizontal plate is arranged below the horizontal rotating fork-shaped horizontal plate and is in transmission connection with the C-axis servo motor, the upper end of the vertical rotating fork-shaped vertical plate is arranged at the front side of the vertical rotating horizontal plate, the lower end of the vertical rotating fork-shaped vertical plate is suspended and protrudes downward, and the A-axis servo motor driving the laser welding head to rotate in the vertical plane is horizontally arranged at the fork-shaped opening at the lower end of the vertical rotating fork-shaped vertical plate; the front side of the vertical rotating fork-shaped vertical plate is provided with a welding head fixing plate, the welding head fixing plate is in transmission connection with the A-axis servo motor; and the laser welding head is fixed at the front side of the welding head fixing plate.

[0042] The utility model discloses a working principle as follows: guardrail welding spare fixed establishment is used for clamping guardrail edge material and guardrail cross arm material and so on work piece as jig, ensure that work piece weld position is stable, consistent, 2 groups five axle servo module respectively to the both ends of guardrail cross arm material carry out synchronous or asynchronous welding. XYZ three axle servo module and bidirectional servo rotating mechanism in each group five axle servo module constitute five axle linkage mechanism, realize 3 dimensional freedom degree and add joint freedom degree again. Among them, the XYZ three axle servo module corresponds the position of three spatial dimensions in space XYZ, so that the driving laser welding head and the workpiece position are matched and corresponding, the bidirectional servo rotating mechanism is adjusted as the joint angle when welding, and the driving laser welding head is moved in the horizontal direction and the vertical direction, and the complex joint can be welded; after the linkage of five axle linkage mechanism is connected with the matched motion controller, the welding can be automatically implemented. When the welding is automatically implemented, the motion controller converts the power analog signal input on the touch screen into a voltage digital signal and transmits it to the laser, the laser emits corresponding laser light source energy according to the received voltage signal, the laser light source energy is transmitted to the laser welding head through an optical fiber, and finally the photo-thermal conversion process is completed through the collimation and focusing of the internal optical lens of the laser welding head, the laser welding head is driven by the five axle linkage mechanism to move to the preset coordinate position to align the weld, then uniform speed motion is kept in the up-down and left-right directions, and according to the welding process requirement, the welding process can be selected without filling the welding wire or automatically filling the welding wire through the welding wire feeding mechanism, so that the uniform and beautiful weld forming is achieved.

[0043] As can be seen from the above, relative to the prior art, the utility model also has the following advantages:

[0044] (1) the laser welding head has large freedom degree, under the holding of XYZ three axle servo module and bidirectional servo rotating mechanism, each laser welding head has five movement dimensions, is compatible with multidimensional arc welding function, increases the application range, can weld complex special-shaped weld, has high cost performance, and production matching application is flexible;

[0045] (2) adopt integral structure, and the structure is stable, when high speed runs, the integral structure will not sway, and the working efficiency is high.

[0046] It is more convenient to replace the welding wire disc, and the welding wire conveying is smooth.

[0047] (3) the compact structure of the whole type leads to relatively small volume, and the occupied space is less, and space waste is not caused;

[0048] (4) the welding wire feeding distance is short, the welding wire feeding mechanism is arranged scientifically, and the welding wire feeding is more smooth. DRAWINGS

[0049] The accompanying drawings are used to provide further understanding of the present application, together with embodiments of the present application, used to explain the present application, and do not constitute limitations to the present application, and in the drawings:

[0050] Figure 1 It is a front view of the double-end guardrail laser welding machine in the present application;

[0051] Figure 2 It is a perspective view of Figure 1 ;

[0052] Figure 3 It is a left view of Figure 1 ;

[0053] Figure 4 It is a right view of Figure 1 ;

[0054] Figure 5 It is a top view of Figure 1 ;

[0055] Figure 6 It is a perspective view of the X-axis servo module;

[0056] Figure 7 It is a perspective view of the Y-axis servo module;

[0057] Figure 8 It is a perspective view of the Z-axis servo module;

[0058] Figure 9 It is a perspective view of the welding wire feeding mechanism;

[0059] Figure 10 It is an exploded view of the bidirectional servo rotating mechanism;

[0060] Figure 11 It is a perspective view of the guardrail welding part fixing mechanism;

[0061] Figure 12 It is a principle block diagram of the control system of the double-end guardrail laser welding machine.

[0062] Key reference numerals: Horizontal frame 0, Laser welding device 1, Guardrail welding component fixing mechanism 2, XYZ three-axis servo module 3, Bidirectional servo rotation mechanism 4, Laser cabinet 5, Laser welding head 6, Welding wire feeding mechanism 7, Touch screen 8, Guardrail edge material 9, Crossbeam material 10, Water chiller 13, Side pressure clamping strip 20, Edge material bottom support strip 21, Crossbeam material bottom support strip 22, Edge material clamping cylinder 23, Edge material bottom support groove 24, Edge material head and tail positioning block 25, Crossbeam material bottom support groove 2 6. Crossbeam head and tail positioning blocks 27; X-axis servo module 31, Y-axis servo module 32, Z-axis servo module 33, X-axis vertical arm 311, X-axis horizontal arm 312, horizontal arm rib 3121, fiber optic cantilever rod 3122; X-axis upper slider 3131, X-axis lower slider 3132, X-axis upper sliding plate 3133, X-axis upper sliding horizontal arm 3134, X-axis lower sliding plate 3135; X-axis servo motor 314; X-axis sliding frame 315, X-axis upper sliding plate 3151, X-axis lower sliding plate 3 152, X-axis slag-blocking plate 3153; X-axis front and rear sliding assembly 316, X-axis front and rear sliding rack 3161, X-axis front and rear sliding gear 3162; X-axis slide rail 317, X-axis upper slide rail 3171, X-axis lower slide rail 3172, X-axis cable chain 318, X-axis cable chain support plate 319; Y-axis slide block 321, Y-axis vertical slide plate 323; Y-axis slide groove 325, YZ-axis cable chain support arm 326, Y-axis cable chain 328; Z-axis slide block 331, Z-axis slider 333, Z-axis Motor 334; Z-axis slide 335, Z-axis drag chain fixing plate 336, Z-axis drag chain 338; horizontal rotating vertical plate 40, horizontal rotating fork-shaped horizontal plate 41, C-axis servo motor 42, horizontal servo rotating mechanism 43, welding head fixing plate 46, vertical servo rotating mechanism 44, vertical rotating horizontal plate 45, vertical rotating fork-shaped vertical plate 47, A-axis servo motor 48; wire spool angled arm 71, stepper wire feeder 72, wire spool shaft 74, wire spool locking pin 75; welding wire spool 7a, welding wire 7b. Detailed Implementation

[0063] The present invention and its beneficial technical effects will be further described in detail below with reference to the accompanying drawings and preferred embodiments. In particular, for ease of description of the positional relationships between the components, the relative positions of the components in front, back, left, right, top, and bottom are... Figure 4 The orientation shown in the product image is the reference position. The term "workpiece" is a broader concept than "welded component," which in specific embodiments mainly refers to the guardrail edge material and crossbeam material that need to be welded. The following explanation uses a double-headed guardrail laser welding machine as an example.

[0064] like Figures 1-5 As shown, a preferred embodiment of this utility model is a double-headed guardrail laser welding machine, comprising a horizontal frame 0, a laser welding device 1, and a guardrail welding component fixing mechanism 2, wherein...

[0065] The laser welding device 1 is arranged on the horizontal frame 0 and is used for laser welding of guardrail welding pieces placed on the horizontal frame;

[0066] The guardrail welding piece fixing mechanism 2 is arranged on the top of the horizontal frame 0 and is used for fixing the welding pieces;

[0067] The laser welding device 1 comprises two groups of five-axis servo modules, a laser and a laser welding head 6;

[0068] The two groups of five-axis servo modules are symmetrically arranged on the left and right sides of the horizontal frame 0 and are movable relative to the horizontal frame 0, and the two groups of five-axis servo modules are respectively a left five-axis servo module and a right five-axis servo module, each group of five-axis servo modules comprises an XYZ three-axis servo module 3 and a bidirectional servo rotating mechanism 4;

[0069] The XYZ three-axis servo module 3 is arranged on the left side of the top of the horizontal frame 0 and is used for adjusting the three-dimensional space position of the bidirectional servo rotating mechanism 4 above the horizontal frame 0;

[0070] The bidirectional servo rotating mechanism 4 is arranged on the XYZ three-axis servo module 3 and is located above the guardrail welding piece fixing mechanism 2 and is used for adjusting the rotation angle of the laser welding head 6 in the horizontal direction and the vertical direction;

[0071] The laser is arranged in the interior of the horizontal frame 0 and is used for generating high-energy laser for laser welding; the horizontal frame 0 is provided with a laser cabinet 5 in which two groups of lasers are arranged; in order to ensure that the lasers in the laser cabinet 5 can work stably and reduce the temperature of the lasers, one or more water chillers 13 are arranged behind the laser cabinet 5;

[0072] The laser welding head 6 is arranged on the bidirectional servo rotating mechanism 4 and is located above the guardrail welding piece fixing mechanism 2 and is used for welding the welding pieces connected with each other; the laser welding head 6 is connected with the laser through an optical fiber;

[0073] The XYZ three-axis servo module 3 comprises an X-axis servo module 31, a Y-axis servo module 32, a Z-axis servo module 33 and a welding wire feeding mechanism 7 for feeding welding wire 7b to a welding seam;

[0074] The X-axis servo module 31 is vertically arranged on the left side or the right side of the horizontal frame 0 and is movable forward and backward; the X-axis servo module 31 is used for adjusting the forward and backward horizontal position of the Y-axis servo module 32, that is, adjusting the forward and backward horizontal position of the laser welding head 6; at the same time, the X-axis servo module 31 is also used for adjusting the forward and backward horizontal position of the welding wire feeding mechanism 7, that is, the position corresponding to the head and tail of the guardrail side material;

[0075] The Y-axis servo module 32 can drive the Z-axis servo module 33 to be suspended above the left half or the right half of the horizontal rack 0 and is fixed at one end of the X-axis servo module 31; it is used to adjust the horizontal transverse position of the Z-axis servo module 33, that is, to adjust the horizontal transverse position of the laser welding head 6; at the same time, it is also used to adjust the horizontal transverse position of the welding wire feeding mechanism 7; that is, the position corresponding to the tail of the cross arm of the guardrail;

[0076] The Z-axis servo module 33 can drive the bidirectional servo rotating mechanism 4 to be suspended above the left half or the right half of the horizontal rack 0 and is fixed at one end of the Y-axis servo module 32; it is used to adjust the vertical position of the bidirectional servo rotating mechanism 4, that is, to adjust the vertical position of the laser welding head 6; at the same time, it is also used to adjust the vertical position of the welding wire feeding mechanism 7; its main function is to adjust the lifting action of the laser welding head 6;

[0077] The bidirectional servo rotating mechanism 4 is suspended above the left half or the right half of the horizontal rack 0 and is fixed at the lower end of the Z-axis servo module 33; it is used for joint adjustment of the welding angle of the laser welding head 6; its main function is to adjust the welding position of the laser welding head 6, such as the upper side or the side, which plays a role in joint adjustment;

[0078] The welding wire feeding mechanism 7 is arranged on the Z-axis servo module 33; the welding wire feeding mechanism 7 can move synchronously with the Z-axis servo module 33, so that it maintains a relatively stable position relative to the laser welding head 6;

[0079] As shown in Figure 11 The guardrail welding part fixing mechanism 2 includes a left positioning mechanism and a right positioning mechanism, and the left positioning mechanism and the right positioning mechanism are arranged on the top of the horizontal rack 0 in a left-right opposite manner; the left positioning mechanism or the right positioning mechanism each includes a side pressing clamping type strip 20, an edge material bottom supporting plate strip 21, and a cross arm material bottom supporting plate strip 22; the side pressing clamping type strip 20 for clamping the edge material from the outside, the edge material bottom supporting plate strip 21 for supporting the edge material from below, and the cross arm material bottom supporting plate strip 22 for supporting the edge material from below are arranged in sequence from outside to inside on the left side or the right side of the top of the horizontal rack 0; in terms of height, the heights of the edge material bottom supporting plate strip 21 and the cross arm material bottom supporting plate strip 22 are lower than the height of the side pressing clamping type strip 20;

[0080] A plurality of edge material clamping cylinders 23 are arranged on the left side of the horizontal rack 0 and are evenly distributed on the horizontal rack 0; the edge material clamping cylinders 23 are arranged outside the side pressing clamping type strip 20 on the left side and are in transmission connection with the side pressing clamping type strip 20 on the left side.

[0081] Preferably, the edge material bottom support plate strip 21 and the cross arm material bottom support plate strip 22 are provided with positioning and adjusting longitudinal grooves with a notch smaller than the groove body on the top, which are the edge material bottom support plate groove 24 and the cross arm material bottom support plate groove 26 respectively, and the edge material head and tail positioning block 25 for limiting the head or tail of the guardrail edge material is arranged on the edge material bottom support plate groove 24; the cross arm material head and tail positioning block 27 for limiting the head or tail of the cross arm material is arranged on the cross arm material bottom support plate groove 26. The cross arm material head and tail positioning block 27 is arranged in pairs on the cross arm material bottom support plate groove 26, and each pair of cross arm material head and tail positioning blocks 27 is spaced apart by an adjustable clamping groove for placing the left end or right end of the cross arm material, thereby limiting the two ends of the cross arm material from the side. The position of the edge material head and tail positioning block 25 on the edge material bottom support plate strip 21 can be adjusted through the edge material bottom support plate groove 24, thereby determining the positioning of the guardrail edge material on the edge material bottom support plate strip 21; the position of the cross arm material head and tail positioning block 27 on the cross arm material bottom support plate strip 22 can be adjusted through the cross arm material bottom support plate groove 26 to change the width of the adjustable clamping groove, so as to adapt to cross arm materials of different widths or diameters;

[0082] The working process of the guardrail welding fixture 2 is as follows: when the guardrail welding fixture 2 is fixed, first, one of the guardrail edge materials is placed on the right edge material bottom support plate strip 21, and at the same time, it is close to the side pressure clamping type strip 20 as the right side pressing plate of the clamp, and the front end is close to the edge material head and tail positioning block 25 as the edge material end positioning member; then, all the cross arm materials of the guardrail are laid in the adjustable clamping groove composed of adjacent cross arm material head and tail positioning blocks 27, and the left and right ends are supported by the edge material bottom support plate strip 21; then, the other edge material of the guardrail is placed on the left edge material bottom support plate strip 21, and at the same time, it is close to the cross arm material port, and the corresponding button is pressed to start the edge material clamping cylinder 23 to push the left guardrail edge material to the left port of the cross arm material, so that the joint between the guardrail edge material and the cross arm material reaches a close contact state.

[0083] As shown in Figure 6 Preferably, the X-axis servo module 31 includes an X-axis vertical arm 311, an X-axis horizontal arm 312, an X-axis front and rear sliding assembly 316, an X-axis sliding frame 315, an X-axis sliding block, an X-axis sliding rail 317, and an X-axis servo motor 314; wherein,

[0084] The X-axis horizontal arm 312 is arranged on the top of the X-axis vertical arm 311 and protrudes upwards from the horizontal type frame 0; the Y-axis servo module 32 is arranged on the X-axis horizontal arm 312; a plurality of horizontal arm rib rows 3121 for fixing the Y-axis servo module 32 are arranged on the top rear side of the X-axis horizontal arm 312, and one of the horizontal arm rib rows 3121 is provided with a fiber optic pick pole 3122 for guiding the fiber optic to facilitate the connection of the fiber optic between the laser welding head 6 and the laser; when the laser welding head 6 and the laser are connected through the fiber optic, the middle part of the fiber optic is hung on the fiber optic pick pole 3122, so as to ensure that the fiber optic moves with the Y-axis servo module 32;

[0085] The X-axis sliding frame 315 comprises an X-axis upper sliding plate 3151, an X-axis lower sliding plate 3152 and an X-axis slag blocking plate 3153; the X-axis upper sliding plate 3151 and the X-axis lower sliding plate 3152 are arranged one above the other outside the horizontal frame 0; the X-axis slag blocking plate 3153 is arranged between the X-axis upper sliding plate 3151 and the X-axis lower sliding plate 3152; the X-axis slag blocking plate 3153 can prevent the welding slag from falling into the movable parts of the X-axis servo module 31, thereby avoiding damage to the machine;

[0086] The X-axis sliding rail 317 comprises an X-axis upper sliding rail 3171 and an X-axis lower sliding rail 3172; the X-axis upper sliding rail 3171 is arranged outside the X-axis upper sliding plate 3151, and the X-axis lower sliding rail 3172 is arranged outside the X-axis lower sliding plate 3152;

[0087] The X-axis sliding block comprises an X-axis upper sliding block 3131 and an X-axis lower sliding block 3132; the X-axis upper sliding block 3131 is slidably arranged outside the X-axis upper sliding rail 3171, and the X-axis lower sliding block 3132 is slidably arranged on the X-axis lower sliding rail 3172; the X-axis sliding block adopts a "double sliding block" form to ensure its stability as a carrier of the five-axis servo module and ensure its stability during welding displacement; further, in order to further improve the stability during welding displacement, the X-axis upper sliding block 3131 and the X-axis lower sliding block 3132 are both dovetail sliding blocks, and the X-axis upper sliding rail 3171 and the X-axis lower sliding rail 3172 are both dovetail sliding rails matched with the X-axis upper sliding block 3131 and the X-axis lower sliding block 3132; the X-axis upper sliding block 3131 is engaged outside the X-axis upper sliding rail 3171 and is mainly responsible for strengthening the limiting of the X-axis servo module 31; the X-axis lower sliding block 3132 is engaged on the upper side of the X-axis lower sliding rail 3172 and is mainly responsible for strengthening the load-bearing capacity of the X-axis servo module 31; through the engagement combination of the X-axis sliding block in different ways, the stability of the five-axis servo module is greatly improved, and the stability of other suspended parts in the five-axis servo module is maximized;

[0088] The outside of the X-axis upper sliding block 3131 is provided with an X-axis upper sliding plate 3133, and the outside of the X-axis upper sliding plate 3133 is provided with an X-axis upper sliding cross arm 3134;

[0089] The upper side of the X-axis lower sliding block 3132 is provided with an X-axis lower sliding plate 3135;

[0090] The X-axis vertical arm 311 is vertically arranged on the X-axis lower sliding plate 3135, and the X-axis vertical arm 311 is fixed to the outward end of the X-axis upper sliding cross arm 3134 on the side of the horizontal frame 0;

[0091] The X-axis front and rear sliding assembly 316 comprises an X-axis front and rear sliding rack 3161 and an X-axis front and rear sliding gear 3162; the X-axis front and rear sliding rack 3161 is arranged outside the X-axis upper sliding plate 3151 and below the X-axis upper sliding rail 3171;

[0092] The tail of the X-axis servo motor 314 is fixed outside the X-axis vertical arm 311, and the head of the X-axis servo motor 314 penetrates the X-axis upper sliding plate 3133 and is fixed on the X-axis upper sliding plate 3133; the X-axis front and rear sliding gear 3162 is arranged on the output shaft of the head of the X-axis servo motor 314 and is engaged with the X-axis front and rear sliding rack 3161;

[0093] The X-axis slag blocking plate 3153 is provided with an X-axis drag chain support plate 319 above the X-axis lower sliding block 3132; the X-axis drag chain support plate 319 is provided with an X-axis drag chain 318, one end of the X-axis drag chain 318 is fixed on the X-axis drag chain support plate 319, and the other end is fixed on the X-axis vertical arm 311.

[0094] Because the X-axis servo module 31 as a whole load-bearing foundation adopts the double-layer sliding components of the X-axis upper sliding plate 3151 and the X-axis lower sliding plate 3152, the overall structure of the laser welding device 1 is more stable, and the overall structure will not shake during high-speed operation, and the working efficiency is high.

[0095] As shown in Figure 7 Preferably, the Y-axis servo module 32 includes a Y-axis sliding seat 321, a Y-axis sliding drive assembly (not shown in the figure), a Y-axis vertical sliding plate 323, and a YZ-axis drag chain support arm 326;

[0096] The Y-axis sliding seat 321 is horizontally arranged on the X-axis cross arm 312, and the Y-axis sliding drive assembly that drives the Y-axis vertical sliding plate 323 to slide left and right outside the Y-axis sliding seat 321 is arranged inside the Y-axis sliding seat 321;

[0097] The Y-axis vertical sliding plate 323 is arranged on the front side of the Y-axis sliding seat 321 and can slide left and right; the Z-axis servo module 33 is vertically arranged outside the Y-axis vertical sliding plate 323;

[0098] The top of the Y-axis sliding seat 321 is provided with a Y-axis sliding groove 325, and the upper part of the Y-axis vertical sliding plate 323 penetrates the Z-axis sliding groove 335 and is in transmission connection with the Y-axis sliding drive assembly;

[0099] The YZ-axis drag chain support arm 326 is in L-shaped structure, and the YZ-axis drag chain support arm 326 is arranged on the front side edge of the Y-axis vertical sliding plate 323; the Y-axis sliding seat 321 is provided with a Y-axis drag chain 328, one end of the Y-axis drag chain 328 is fixed on the Y-axis sliding seat 321, and the other end is fixed on the bottom surface of the YZ-axis drag chain support arm 326. In order to prevent dust, the Y-axis sliding drive assembly is generally arranged inside the Y-axis sliding seat 321, and preferably, the Y-axis sliding drive assembly includes a Y-axis screw rod assembly and a Y-axis motor, the Y-axis motor is arranged on the upper end of the Y-axis sliding seat and is in transmission connection with one end of the screw rod of the Y-axis screw rod assembly.

[0100] As shown in Figure 8As shown, preferably, the Z-axis servo module 33 includes a Z-axis slide block 331, a Z-axis lead screw assembly (not shown in the figure), a Z-axis slider 333, and a Z-axis motor 334; the Z-axis slider 333 is vertically disposed outside the Y-axis vertical slide block 323, the Z-axis slide block 331 is vertically disposed outside the Z-axis slider 333, the Z-axis lead screw assembly is disposed inside the Z-axis slide block 331, and the Z-axis motor 334 is disposed at the upper end of the Z-axis slide block 331 and is connected to one end of the lead screw of the Z-axis lead screw assembly for transmission.

[0101] Z-axis slide block 331 has a Z-axis slide groove 335 on its left or right side. Z-axis slider 333 is slidably mounted on Z-axis slide block 331 and passes through Z-axis slide groove 335 to be fixedly connected to the lead screw nut of Z-axis lead screw assembly. Bidirectional servo rotation mechanism 4 is fixed at the lower end of Z-axis slide block 331. Z-axis drag chain 338 is provided on one side of Z-axis slide block 331. One end of Z-axis drag chain 338 is fixed on Z-axis slide block 331 and the other end is fixed on the top surface of YZ axis drag chain support arm 326.

[0102] like Figure 9 As shown, preferably, the wire feeding mechanism 7 includes a wire spool angled arm 71 and a stepping wire feeder 72, both mounted on the Z-axis slide 331. The lower arm of the wire spool angled arm 71 is located on the front side of the Z-axis slide 331, and the upper arm of the wire spool angled arm 71 is inclined above and behind the Z-axis slide 331. A horizontally arranged wire spool shaft 74 is provided on the left or right side of the upper end of the wire spool angled arm 71. A wire spool locking pin 75 is provided at the outward end of the wire spool shaft 74 to prevent the wire spool 7a from falling off. In use, the wire spool 7a is threaded onto the wire spool shaft 74, so that the wire spool 7a is suspended above the Z-axis slide 331, which is conducive to the transmission of the welding wire to the laser welding head 6. Then, the wire spool locking pin 75 is inserted to limit the wire spool 7a.

[0103] The stepper wire feeder 72 is positioned at the front corner of the wire spool angled arm 71, and its position is lower than the wire spool shaft 74. This structure of the welding wire feeding mechanism 7 not only makes it easier to replace the welding wire spool 7a, but also increases the smoothness of welding wire transmission by utilizing the self-weight of the welding wire and the consistency of the wire feeding guide.

[0104] like Figure 10 As shown, preferably, the bidirectional servo rotation mechanism 4 includes a vertical servo rotation mechanism 44 that can drive the laser welding head 6 to rotate in a vertical plane and a horizontal servo rotation mechanism 43 that can drive the vertical servo rotation mechanism 44 to rotate in a horizontal plane. The horizontal servo rotation mechanism 43 is suspended at the lower end of the Z-axis servo module 33, and the vertical servo rotation mechanism 44 is suspended at the lower end of the horizontal servo rotation mechanism 43.

[0105] Preferably, the horizontal servo rotation mechanism 43 comprises a horizontal rotation vertical plate 40, a horizontal rotation fork-shaped horizontal plate 41 and a C-axis servo motor 42, the horizontal rotation vertical plate 40 is vertically arranged at the middle position of the horizontal rotation fork-shaped horizontal plate 41, the rear side of the horizontal rotation vertical plate 40 is fixedly arranged at the front side of the Z-axis servo module 33, the rear part of the horizontal rotation fork-shaped horizontal plate 41 is arranged at the bottom side of the horizontal rotation vertical plate 40, and the front half end of the horizontal rotation fork-shaped horizontal plate 41 is suspended and protrudes forwardly; the C-axis servo motor 42 driving the vertical servo rotation mechanism 44 to rotate in the horizontal plane is vertically arranged at the fork-shaped opening at the right end of the horizontal rotation fork-shaped horizontal plate 41.

[0106] Preferably, the vertical servo rotation mechanism 44 comprises a vertical rotation horizontal plate 45, a vertical rotation fork-shaped vertical plate 47 and an A-axis servo motor 48; the vertical rotation horizontal plate 45 is arranged below the horizontal rotation fork-shaped horizontal plate 41 and is in transmission connection with the C-axis servo motor 42, the upper end of the vertical rotation fork-shaped vertical plate 47 is arranged at the front side of the vertical rotation horizontal plate 45, the lower end of the vertical rotation fork-shaped vertical plate 47 is suspended and protrudes downwardly, and the A-axis servo motor 48 driving the laser welding head 6 to rotate in the vertical plane is horizontally arranged at the fork-shaped opening at the lower end of the vertical rotation fork-shaped vertical plate 47; the front side of the vertical rotation fork-shaped vertical plate 47 is provided with a welding head fixing plate 46, the welding head fixing plate 46 is in transmission connection with the A-axis servo motor 48; and the laser welding head 6 is fixed at the front side of the welding head fixing plate 46.

[0107] In the embodiment, the X-axis servo module 31, the Y-axis servo module 32 and the Z-axis servo module 33 in the XYZ three-axis servo module 3 correspond to the positions of the three spatial dimensions of the space XYZ, so that the laser welding head 6 is driven to correspond to the position of the workpiece; the horizontal servo rotation mechanism 43 and the vertical servo rotation mechanism 44 in the bidirectional servo rotation mechanism 4 are used as the joint angle adjustment during welding, so that the laser welding head 6 is driven to perform joint movement in the horizontal direction and the vertical direction, thereby forming a total of 10-axis multi-degree-of-freedom welding structure of 5-axis on each of the left and right sides, and the complex profiled joint can be welded.

[0108] In the embodiment, the X-axis drag chain 318, the Y-axis drag chain 328 and the Z-axis drag chain 338 are used for protection of pipelines of respective motors.

[0109] In the embodiment, the side pressure clamping type strip 20 is matched with the edge material bottom support plate strip 21 and the cross arm material bottom support plate strip 22, the edge material is supported by the edge material bottom support plate strip 21, the cross arm material is supported by the cross arm material bottom support plate strip 22, the edge material is directly pushed and clamped by the left side pressure clamping type strip 20, and the cross arm material is indirectly clamped by the edge material through the left and right side pressure clamping type strips 20. The head of the edge material (or the tail of the edge material) is positioned by the edge material head-tail positioning block 25, and the cross arm material is positioned by the cross arm material head-tail positioning block 27. The clamping and positioning mode is suitable for positioning and clamping of workpieces in shapes of rectangle, parallelogram, trapezoid and the like. The edge material of the guardrail can be a circular pipe or a square pipe. Since two groups of five-axis servo modules are adopted, the two edge materials of the guardrail can be simultaneously welded synchronously or asynchronously, the non-standard workpiece size has strong adaptability, and the operation is convenient, so that the welding requirements of various angles and directions can be met.

[0110] When welding the guardrail, there are various types of splicing interfaces on each guardrail, and the front and back weld lengths and arrangements are different. It is not easy to achieve rapid conversion of the various welding paths and corresponding welding parameters on a single double-head guardrail laser welding machine. In order to solve this difficulty, first, some improvements are made to the program architecture of the motion controller, and the storage and calling functions of multiple groups of welding formulas are integrated. When using, you only need to press read on the touch screen. Each group of formulas can be obtained by training, such as adding new products, which can be programmed through very simple teaching. At this time, you only need to record the welding path by pressing once on the welding head at the start and end positions. In addition, for products such as guardrails with multiple repeated feature welds, a path array function is also developed to achieve rapid programming. After programming, save the location in the formula management page and press save. This path is stored and managed, and can be read at any time for corresponding product use.

[0111] Automatic start buttons 12 are installed in parallel on the left and right side operation areas of the horizontal rack 0. When operating, you can quickly select the start button, which is simple and practical. In order to operate more conveniently, five automatic start buttons 12 are installed in parallel on the left and right side operation areas of the horizontal rack 0.

[0112] The double-head guardrail laser welding machine needs to be controlled by the double-head guardrail laser welding machine control system to realize automatic welding, such as Figure 12As shown, the double-head guardrail laser welding machine control system comprises a man-machine interface, a motion controller, a remote IO control module for remote control and a 10-axis multi-trans servo drive; the man-machine interface for human-computer interaction is electrically connected with the motion controller controlling the action of the double-head guardrail laser welding machine through an ETHERNET bus, and the motion controller and the 10-axis multi-trans servo drive are electrically connected through an ECAT bus. The man-machine interface is preferably a touch screen 8, which is arranged on one side of the horizontal rack 0. The 10-axis multi-trans servo drive is electrically connected with corresponding servo motors in the left and right corresponding X-axis servo module 31, Y-axis servo module 32, Z-axis servo module 33, horizontal servo rotating mechanism 43 and vertical servo rotating mechanism 44 respectively; the left X motor in the figure corresponds to the X-axis servo motor used by the left X-axis servo module 31, the left Y motor corresponds to the Y-axis servo motor used by the left Y-axis servo module 32, the left Z motor corresponds to the Z-axis servo motor used by the left Z-axis servo module 33, the left C motor corresponds to the C-axis servo motor used by the left horizontal servo rotating mechanism 43, and the left A motor corresponds to the A-axis servo motor used by the left vertical servo rotating mechanism 44. Similarly, the right X motor in the figure corresponds to the X-axis servo motor used by the right X-axis servo module 31, the right Y motor corresponds to the Y-axis servo motor used by the right Y-axis servo module 32, the right Z motor corresponds to the Z-axis servo motor used by the right Z-axis servo module 33, the right C motor corresponds to the C-axis servo motor used by the right horizontal servo rotating mechanism 43, and the right A motor corresponds to the A-axis servo motor used by the right vertical servo rotating mechanism 44.

[0113] The side material clamping cylinder 23 clamping action can be automatically controlled or manually controlled, and the side pressure clamping type strip 20 is driven to act by controlling the electromagnetic valve, and the electromagnetic valve controls the side material clamping cylinder 23 to communicate with the high-pressure gas source.

[0114] The welding parameters are input by the man-machine interface, the welding parameters are transmitted to the motion controller, the motion controller issues a command to the servo drive of each "axis" in the "10-axis" according to the parameters, and the servo drive drives the corresponding servo motor to operate; the speed control, position positioning, linear interpolation motion and circular interpolation motion of each servo motor are realized, the laser welding head 6 is driven to make corresponding welding trajectories, and the control output of the laser is performed in the motion process, and the automatic welding of the guardrail is realized.

[0115] After the rail welding piece fixing mechanism 2 fixes the to-be-welded material, the automatic start button 12 is pressed, and the left and right five-axis servo modules drive two welding heads to automatically complete laser welding of all joints on the front surface of the rail (the automatic wire filling function of each welding pass can be preset according to the process requirements), and if the joints on the back surface need to be welded, the workpiece is turned over and placed on the fixed reference, the welding path on the back surface is selected on the touch screen, and then the automatic start button is pressed, so that the laser welding of the joints on the back surface is completed, and after the welding is completed, the left and right five-axis servo modules move to the standby position, facilitating the taking and placing of the workpiece, and the equipment control is one-key operation, which is simple and fast.

[0116] Since the left and right can be welded synchronously without interfering with each other, the overall structure is relatively compact, so relatively, space is saved, and work efficiency is relatively high. Under the same production conditions, the number of workers can be greatly reduced.

[0117] In the above description, the contents belonging to the conventional use in the prior art, such as the transmission connection parts and machining processes related to the X-axis front and rear sliding assembly, the Y-axis sliding driving assembly, the Z-axis screw assembly, the cylinder driving, the motor rotating driving, the laser and the laser welding head are market-purchasable products, and in order to save space, they are not described in detail. Other machining processes and parts are processed according to the conventional technology of the prior art.

[0118] Finally, it should be pointed out that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the embodiment, for the person skilled in the art, the technical scheme recorded in the above embodiments can be modified, or some technical features can be replaced, but any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A guardrail welding piece fixing mechanism of a double-end guardrail laser welding machine, characterized in that, The guardrail welding piece fixing mechanism (2) comprises a left positioning mechanism and a right positioning mechanism, and the left positioning mechanism and the right positioning mechanism are arranged in a left-right opposite manner on the top of the horizontal rack (0) of the double-head guardrail laser welding machine; the left positioning mechanism or the right positioning mechanism each comprises a side pressing clamping type strip (20), a side material bottom supporting plate strip (21) and a cross arm material bottom supporting plate strip (22); the side pressing clamping type strip (20) for clamping the guardrail side material from the outside, the side material bottom supporting plate strip (21) for supporting the guardrail side material from below and the cross arm material bottom supporting plate strip (22) for supporting the guardrail side material from below are arranged in sequence from the outside to the inside on the left side or the right side of the top of the horizontal rack (0); in terms of height, the height of the side material bottom supporting plate strip (21) and the height of the cross arm material bottom supporting plate strip (22) are both lower than the height of the side pressing clamping type strip (20); A plurality of side material clamping cylinders (23) are arranged on the left side of the horizontal rack (0), and the side material clamping cylinders (23) are uniformly distributed and arranged on the horizontal rack (0); the side material clamping cylinders (23) are arranged outside the side pressing clamping type strip (20) on the left side and are in transmission connection with the side pressing clamping type strip (20) on the left side.

2. The guardrail welding fixture of a double-end guardrail laser welding machine according to claim 1, wherein, The top of the side material bottom supporting plate strip (21) and the cross arm material bottom supporting plate strip (22) is provided with a positioning adjustment longitudinal groove with a slot opening smaller than a slot body, which is a side material bottom supporting plate slot (24) and a cross arm material bottom supporting plate slot (26) respectively; the side material bottom supporting plate slot (24) is provided with a side material head and tail positioning block (25) for limiting the head or tail of the guardrail side material; the cross arm material bottom supporting plate slot (26) is provided with a plurality of cross arm material head and tail positioning blocks (27) for limiting the head or tail of the cross arm material. The cross arm material head and tail positioning blocks (27) are arranged in pairs on the cross arm material bottom supporting plate slot (26), and each pair of cross arm material head and tail positioning blocks (27) is provided with an adjustable clamping groove for placing the left end or the right end of the cross arm material.

3. A double-head guardrail laser welding machine, comprising a horizontal rack (0), a laser welding device (1) and a guardrail welding piece fixing mechanism (2) of the double-head guardrail laser welding machine according to claim 2, wherein, the laser welding device (1) is arranged on the horizontal rack (0); the guardrail welding piece fixing mechanism (2) is arranged on the top of the horizontal rack (0) and is used for fixing the welding piece; characterized in that: the laser welding device (1) comprises two groups of five-axis servo modules and a laser welding head (6); the two groups of five-axis servo modules are the same in structure and are arranged on the left side and the right side of the horizontal rack (0) in a movable and left-right symmetrical manner relative to the horizontal rack (0), and the two groups of five-axis servo modules are respectively a left five-axis servo module and a right five-axis servo module; each group of five-axis servo modules comprises an XYZ three-axis servo module (3) and a bidirectional servo rotating mechanism (4); the XYZ three-axis servo module (3) is arranged on the top of the left side of the horizontal rack (0) and is used for adjusting the three-dimensional space position of the bidirectional servo rotating mechanism (4) above the horizontal rack (0); the bidirectional servo rotating mechanism (4) is arranged on the XYZ three-axis servo module (3) and is located above the guardrail welding piece fixing mechanism (2) and is used for adjusting the rotation angle of the laser welding head (6) in the horizontal direction and the vertical direction. The laser welding head (6) is arranged on the bidirectional servo rotating mechanism (4) and is located above the guardrail welding part fixing mechanism (2) and is used for welding the interconnected welding parts; The XYZ three-axis servo module (3) comprises an X-axis servo module (31), a Y-axis servo module (32), a Z-axis servo module (33) and a welding wire feeding mechanism (7) for feeding the welding wire (7b) to the welding seam; The X-axis servo module (31) is vertically arranged on the left side or the right side of the horizontal rack (0) and is movable forward and backward; The Y-axis servo module (32) is suspendedly arranged above the left half or the right half of the horizontal rack (0) and is movable leftward and rightward with the Z-axis servo module (33), and one end of the Y-axis servo module (32) is fixed to the X-axis servo module (31); The Z-axis servo module (33) is suspendedly arranged above the left half or the right half of the horizontal rack (0) and is movable upward and downward with the bidirectional servo rotating mechanism (4), and one end of the Z-axis servo module (33) is fixed to the Y-axis servo module (32); The bidirectional servo rotating mechanism (4) is suspendedly arranged above the left half or the right half of the horizontal rack (0), and the upper end of the bidirectional servo rotating mechanism (4) is fixed to the lower end of the Z-axis servo module (33); The welding wire feeding mechanism (7) is arranged on the Z-axis servo module (33).

4. The double-end guardrail laser welding machine according to claim 3, characterized in that, The X-axis servo module (31) comprises an X-axis vertical arm (311), an X-axis horizontal arm (312), an X-axis forward and backward sliding assembly (316), an X-axis sliding frame (315), an X-axis sliding block, an X-axis sliding rail (317) and an X-axis servo motor (314); wherein, The X-axis horizontal arm (312) is arranged at the top of the X-axis vertical arm (311) and is suspendedly extended above the horizontal rack (0); the Y-axis servo module (32) is arranged on the X-axis horizontal arm (312); The X-axis sliding frame (315) comprises an X-axis upper sliding plate (3151), an X-axis lower sliding plate (3152) and an X-axis slag blocking plate (3153); the X-axis upper sliding plate (3151) and the X-axis lower sliding plate (3152) are arranged one above the other outside the horizontal rack (0); the X-axis slag blocking plate (3153) is arranged between the X-axis upper sliding plate (3151) and the X-axis lower sliding plate (3152); The X-axis sliding rail (317) comprises an X-axis upper sliding rail (3171) and an X-axis lower sliding rail (3172); the X-axis upper sliding rail (3171) is arranged outside the X-axis upper sliding plate (3151); and the X-axis lower sliding rail (3172) is arranged outside the X-axis lower sliding plate (3152); The X-axis sliding block comprises an X-axis upper sliding block (3131) and an X-axis lower sliding block (3132); the X-axis upper sliding block (3131) is slidably arranged outside the X-axis upper sliding rail (3171); and the X-axis lower sliding block (3132) is slidably arranged on the X-axis lower sliding rail (3172); The outside of the X-axis upper sliding block (3131) is provided with an X-axis upper sliding plate (3133); and the outside of the X-axis upper sliding plate (3133) is provided with an X-axis upper sliding horizontal arm (3134); The upper side of the X-axis lower sliding block (3132) is provided with an X-axis lower sliding plate (3135); and the outside of the X-axis lower sliding plate (3135) is provided with an X-axis lower sliding horizontal arm (3136). The X-axis vertical arm (311) is vertically arranged on the X-axis lower sliding plate (3135), and the X-axis vertical arm (311) is fixed to the outer end of the X-axis upper sliding horizontal arm (3134) on the side of the horizontal rack (0); The X-axis front-rear sliding assembly (316) comprises an X-axis front-rear sliding rack (3161) and an X-axis front-rear sliding gear (3162); the X-axis front-rear sliding rack (3161) is arranged outside the X-axis upper sliding plate (3151) and below the X-axis upper sliding rail (3171); The tail of the X-axis servo motor (314) is fixed outside the X-axis vertical arm (311), the head of the X-axis servo motor (314) penetrates through the X-axis upper sliding plate (3133) and is fixed on the X-axis upper sliding plate (3133); the X-axis front-rear sliding gear (3162) is arranged on the output shaft of the head of the X-axis servo motor (314) and is in mesh with the X-axis front-rear sliding rack (3161).

5. The double-end guardrail laser welding machine according to claim 4, characterized in that, The Y-axis servo module (32) comprises a Y-axis sliding seat (321), a Y-axis sliding drive assembly, and a Y-axis vertical sliding plate (323); The Y-axis sliding seat (321) is horizontally arranged on the X-axis horizontal arm (312), and the Y-axis sliding drive assembly for driving the Y-axis vertical sliding plate (323) to slide left and right outside the Y-axis sliding seat (321) is arranged in the Y-axis sliding seat (321); The Y-axis vertical sliding plate (323) is slidably arranged on the front side of the Y-axis sliding seat (321); and the Z-axis servo module (33) is vertically arranged outside the Y-axis vertical sliding plate (323). The top of the Y-axis sliding seat (321) is provided with a Y-axis sliding groove (325), and the upper part of the Y-axis vertical sliding plate (323) penetrates through the Z-axis sliding groove (335) and is in transmission connection with the Y-axis sliding drive assembly.

6. The double-end guardrail laser welding machine of claim 5, wherein, The Z-axis servo module (33) comprises a Z-axis sliding seat (331), a Z-axis screw rod assembly, a Z-axis sliding block (333), and a Z-axis motor (334); The Z-axis sliding block (333) is vertically arranged outside the Y-axis vertical sliding plate (323), the Z-axis sliding seat (331) is vertically arranged outside the Z-axis sliding block (333), the Z-axis screw rod assembly is arranged in the Z-axis sliding seat (331), and the Z-axis motor (334) is arranged on the upper end of the Z-axis sliding seat (331) and in transmission connection with one end of the screw rod of the Z-axis screw rod assembly; The left side or the right side of the Z-axis sliding seat (331) is provided with a Z-axis sliding groove (335), and the Z-axis sliding block (333) is slidably arranged on the Z-axis sliding seat (331) and penetrates through the Z-axis sliding groove (335) and is in fixed connection with the screw nut of the Z-axis screw rod assembly; and the bidirectional servo rotating mechanism (4) is fixed to the lower end of the Z-axis sliding seat (331).

7. The double-end guardrail laser welding machine according to claim 6, characterized in that, The wire feeding mechanism (7) comprises a wire disc corner inclined arm (71) and a step wire feeder (72), both of which are arranged on the Z-axis sliding seat (331); the lower arm of the wire disc corner inclined arm (71) is arranged on the front side of the Z-axis sliding seat (331), the upper arm of the wire disc corner inclined arm (71) is inclined above the rear of the Z-axis sliding seat (331), the upper end of the wire disc corner inclined arm (71) is provided with a wire disc shaft (74) arranged transversely, and the outer end of the wire disc shaft (74) is provided with a wire disc lock pin (75) for preventing the wire disc (7a) from falling off. The step feed wire machine (72) is arranged at the front corner of the wire reel corner inclined arm (71) and is lower than the wire reel shaft (74).

8. A twin-barrier laser welding machine according to any one of claims 5 to 7, characterized in that, The bidirectional servo rotating mechanism (4) comprises a vertical servo rotating mechanism (44) capable of driving the laser welding head (6) to rotate in a vertical plane and a horizontal servo rotating mechanism (43) capable of driving the vertical servo rotating mechanism (44) to rotate in a horizontal plane, the horizontal servo rotating mechanism (43) is suspended at the lower end of the Z-axis servo module (33), and the vertical servo rotating mechanism (44) is suspended at the lower end of the horizontal servo rotating mechanism (43).

9. The double-end guardrail laser welding machine according to claim 8, characterized in that, The horizontal servo rotating mechanism (43) comprises a horizontal rotating vertical plate (40), a horizontal rotating fork-shaped horizontal plate (41) and a C-axis servo motor (42), the horizontal rotating vertical plate (40) is vertically arranged at the middle position of the horizontal rotating fork-shaped horizontal plate (41), the rear side of the horizontal rotating vertical plate (40) is fixedly arranged at the front side of the Z-axis servo module (33), the rear part of the horizontal rotating fork-shaped horizontal plate (41) is arranged at the bottom side of the horizontal rotating vertical plate (40), and the front half end of the horizontal rotating fork-shaped horizontal plate (41) is suspended and protrudes forward; the C-axis servo motor (42) for driving the vertical servo rotating mechanism (44) to rotate in the horizontal plane is vertically arranged at the fork-shaped opening at the right end of the horizontal rotating fork-shaped horizontal plate (41).

10. The double-end guardrail laser welding machine of claim 9, wherein, The vertical servo rotating mechanism (44) comprises a vertical rotating horizontal plate (45), a vertical rotating fork-shaped vertical plate (47) and an A-axis servo motor (48); the vertical rotating horizontal plate (45) is arranged below the horizontal rotating fork-shaped horizontal plate (41) and is in transmission connection with the C-axis servo motor (42), the upper end of the vertical rotating fork-shaped vertical plate (47) is arranged at the front side of the vertical rotating horizontal plate (45), the lower end of the vertical rotating fork-shaped vertical plate (47) is suspended and protrudes downward, the A-axis servo motor (48) for driving the laser welding head (6) to rotate in the vertical plane is horizontally arranged at the fork-shaped opening at the lower end of the vertical rotating fork-shaped vertical plate (47); the front side of the vertical rotating fork-shaped vertical plate (47) is provided with a welding head fixing plate (46), the welding head fixing plate (46) is in transmission connection with the A-axis servo motor (48); and the laser welding head (6) is fixed at the front side of the welding head fixing plate (46).

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