A welding device and method for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel

Abstract

The present invention discloses a welding device and method for welding connectors between multiple anchor rods on the inner wall of a highway tunnel. The present invention relates to the technical field of welding connectors between anchor rods. A positioning and clamping assembly for clamping the tails of the two U-shaped parts of the connector is provided on a mobile trailer. Welding assemblies for pulling the tails of the U-shaped parts of the connector inward and welding the U-shaped parts to the anchor rods are provided on both the left and right sides of the positioning and clamping assembly. The positioning and clamping assembly includes a lifting cylinder fixed on the bottom surface of the mobile trailer. The piston rod of the lifting cylinder passes through the mobile trailer upward and a lifting platform is fixed on the extended end. A guide rail is fixed on the top surface of the lifting platform. A torsion spring is sleeved on the main shaft. A vertical plate and a double-acting cylinder are fixed on the top of the turntable in sequence. The beneficial effects of the present invention are: the connector can be firmly welded between the two anchor rods, greatly improving the welding efficiency of the connector and the two anchor rods.

Description

Technical Field

[0001] The present invention relates to the technical field of welding connecting pieces between anchor rods, in particular to a welding device and method for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel. Background Art

[0002] A cement layer 1 of a certain thickness is usually constructed on the inner wall of a highway tunnel, and a row of anchor rods 2 are constructed in the cement layer 1 along the length direction of the highway tunnel. Figure 1~Figure 2 As shown, the spacing between each two adjacent anchor rods 2 is equal, the inner end of the anchor rod 2 is embedded in the tunnel, and the outer end of the anchor rod 2 extends outside the cement layer 1, wherein the function of the cement layer 1 is to support the highway tunnel, and the function of the anchor rod 2 is to support the cement layer 1.

[0003] In order to prevent the anchor rods 2 from loosening, workers will weld a piece of metal between the outer ends of each adjacent two anchor rods 2. Figure 3~Figure 4 The connecting member 3 shown is used to increase the connection strength between the anchor rods 2, wherein the connecting member 3 includes a flat plate 4 and U-shaped members 5 respectively fixed to the left and right ends of the flat plate 4, and the horizontal spacing between the two U-shaped members 5 is equal to the horizontal spacing between the two anchor rods 2.

[0004] Currently, workers weld a connecting piece 3 between the outer ends of each two adjacent anchor rods 2 in the following manner:

[0005] S1, the worker takes out a Figure 3~Figure 4 The connecting member 3 shown in FIG. 1 is used to sleeve the two U-shaped members 5 on the connecting member 3 onto the outer ends of the two anchor rods 2 from front to back. Figure 5 As shown;

[0006] S2. Welding the left U-shaped piece 5 of the connecting piece 3 to the left anchor rod 2. The specific operation steps are as follows:

[0007] S21, the worker directs the welding head 7 of the laser welding machine 6 toward the left U-shaped part 5 of the connecting part 3, as shown in FIG. Figure 6 As shown;

[0008] S22. The worker turns on the laser welding machine 6. The laser beam generated by the welding head 7 is directed toward the outer surface of the U-shaped member 5, thereby preliminarily welding the U-shaped member 5 to the left anchor rod 2.

[0009] S23, the worker rotates the welding head 7 relative to the U-shaped member 5, and the rotation direction is as follows Figure 7 As shown by the solid arrow in the middle, when the welding head 7 rotates to a certain angle, an arc-shaped weld scar is formed on the outer surface of the U-shaped member 5, thereby welding the left U-shaped member 5 of the connecting member 3 to the left anchor rod 2;

[0010] S3. The worker repeats step S2 once to weld the right U-shaped piece 5 of the connector 3 to the right anchor rod 2, thereby completing welding a connector 3 between the outer ends of the two anchor rods 2.

[0011] S4. The worker repeats steps S1 to S3 for several times, and a connecting piece 3 is welded on the outer ends of every two adjacent anchor rods 2.

[0012] However, although the method used by the workers can weld a connecting piece at the outer ends of each two adjacent anchor rods 2, it still has the following technical defects in actual operation:

[0013] I. In step S1, after the two U-shaped parts 5 of the connector 3 are respectively put on the outer ends of the two anchor rods 2, there is a gap between the inner surface of the U-shaped part 5 and the outer surface of the anchor rod 2 (the reason for the gap is that when the worker puts the U-shaped part 5 of the connector 3 on the anchor rod 2, the worker mistakenly presses down the tail of the U-shaped part 5, causing the width of the U-shaped groove of the U-shaped part 5 to increase). Due to the existence of the gap, the U-shaped part 5 cannot be fully welded on the anchor rod 2, and then the connector 3 cannot be firmly welded between the two anchor rods 2, thereby failing to achieve the purpose of increasing the connection strength between the anchor rods 2.

[0014] II. In step S2, it is necessary to manually rotate the welding head 7 to form an arc-shaped weld scar on the outer surface of the U-shaped part 5. However, during the manual rotation of the welding head 7, it is impossible to ensure that the distance H between the end of the welding head 7 and the outer surface of the U-shaped part 5 remains unchanged, resulting in uneven thickness of the arc-shaped weld scar, which in turn causes the U-shaped part 5 to not be fully welded to the anchor rod 2, and further causes the connecting part 3 to not be firmly welded between the two anchor rods 2, thereby failing to achieve the purpose of increasing the connection strength between the anchor rods 2.

[0015] III. In steps S2~S3, it is necessary to first use the welding head 7 of the laser welding machine 6 to weld the left U-shaped part 5 of the connecting part 3 to the left anchor rod 2, and then use the welding head 7 of the laser welding machine 6 to weld the right U-shaped part 5 of the connecting part 3 to the right anchor rod 2, so that the connecting part 3 can be welded between the two anchor rods 2; and the entire welding process needs to be carried out in two separate steps, resulting in a long time required to weld one connecting part 3 between the two anchor rods 2, thereby reducing the welding efficiency of the connecting part 3 and the two anchor rods 2.

[0016] Therefore, there is an urgent need for a welding device and method that can firmly weld the connecting piece 3 between the two anchor rods 2 and greatly improve the welding efficiency of the connecting piece 3 and the two anchor rods 2. Summary of the Invention

[0017] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a welding device and method for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel, which can firmly weld the connecting piece between two anchor rods and greatly improve the welding efficiency of the connecting piece and the two anchor rods.

[0018] The objectives of the present invention are achieved through the following technical solutions: A welding device for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel, comprising a mobile trailer provided with a positioning and clamping assembly for clamping the tails of both U-shaped pieces of the connecting piece, and welding assemblies for pulling the tails of the U-shaped pieces of the connecting piece inwardly and welding the U-shaped pieces to the anchor rods on both the left and right sides of the positioning and clamping assembly;

[0019] The positioning and clamping assembly includes a lifting cylinder fixedly mounted on the bottom surface of the mobile trailer, a piston rod of the lifting cylinder upwardly penetrating the mobile trailer and a lifting platform fixedly mounted on the extended end, a guide rail fixedly mounted on the top surface of the lifting platform, a slide slidably mounted on the guide rail, a main shaft rotatably mounted on the top surface of the slide via a shaft sleeve, a turntable fixedly mounted on the top of the main shaft, a torsion spring sleeved on the main shaft, two legs of the torsion spring respectively fixed on the shaft sleeve and the turntable, a vertical plate and a double-acting cylinder fixedly mounted on the top of the turntable in sequence;

[0020] Rods are fixed to the working ends of the left and right piston rods of the double-acting oil cylinder, and arc-shaped clamping blocks are fixed to the outer ends of the two rods. Fixed plates opposite to the arc-shaped clamping blocks are welded to the two rods. A movable plate located between the arc-shaped clamping block and the fixed plate is provided on the sliding sleeve of the rod. A horizontal spring A is fixed between the movable plate and the fixed plate. A clamping oil cylinder located below the arc-shaped clamping block is fixed to the outer end surface of the movable plate, and the clamping head of the clamping oil cylinder faces outward.

[0021] Limiting plates are fixed on the top surfaces of the left and right ends of the guide rail, and horizontal springs B are fixed between the two limiting plates and the side end surfaces of the slide.

[0022] The two rods are symmetrically arranged with respect to the cylinder body of the double-acting oil cylinder, the two clamping oil cylinders are symmetrically arranged with respect to the cylinder body of the double-acting oil cylinder, and the two arc-shaped clamping blocks are symmetrically arranged with respect to the cylinder body of the double-acting oil cylinder.

[0023] A handle is fixedly provided on the right end surface of the mobile trailer.

[0024] The welding assembly on the left side includes a feed oil cylinder fixed on the left end surface of the vertical plate, an L-plate fixed on the active end of the piston rod of the feed oil cylinder, an open arc-shaped bar fixed on the top of the vertical plate of the L-plate, the axis of the open arc-shaped bar and the axis of the arc-shaped clamping block are in the same horizontal plane, and the axis of the open arc-shaped bar and the axis of the arc-shaped clamping block are parallel to each other; a slider is slidably sleeved on the open arc-shaped bar, a support plate is fixed on the top surface of the slider, a pin is fixed on the front end surface of the upper end of the support plate, a welding head is fixed on the top surface of the slider, and the welding head is arranged along the radial direction of the open arc-shaped bar; a tension spring is also sleeved on the open arc-shaped bar, one end of the tension spring is fixed on the top end of the open arc-shaped bar, and the other end is fixed on the slider;

[0025] A vertical screw nut pair is provided on the horizontal plate of the L-plate, and a shift plate is fixed on the nut of the vertical screw nut pair. A strip groove is opened in the shift plate, and the strip groove of the shift plate is sleeved on the outside of the pin shaft of the support plate; a pressure wheel is also rotatably installed on the inner end surface of the vertical plate of the L-plate.

[0026] A laser welding machine is fixedly provided on the outer end surface of the vertical screw nut pair, and an output port of the laser welding machine is connected to the welding head.

[0027] The two welding components are symmetrically arranged with respect to the vertical plate of the positioning and clamping component.

[0028] The welding device also includes a controller, which is connected with a lifting oil cylinder, a double-acting oil cylinder, a feeding oil cylinder, a clamping oil cylinder, a vertical screw nut pair, and a laser welding machine.

[0029] A method for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel comprises the following steps:

[0030] S1. The worker takes out a connector and puts the two U-shaped pieces on the connector onto the outer ends of the two anchor rods from front to back.

[0031] S2. The worker pulls the handle to move the mobile trailer on the ground. When the worker observes that the double-acting cylinder of the positioning and clamping assembly is just below the area surrounded by the two anchor rods, the worker stops pulling the handle;

[0032] S3. The piston rod of the lifting cylinder that controls the positioning and clamping assembly extends upward, driving the lifting platform upward. The lifting platform then drives the guide rail, slide, spindle, vertical plate, and double-acting cylinder to move upward synchronously, which in turn drives the two rods and the arc-shaped clamping block to move upward synchronously. When the worker observes that the arc-shaped clamping block is facing the anchor rod, the worker controls the lifting cylinder to close.

[0033] S4. Control the two piston rods of the double-acting oil cylinder to extend outward. The piston rod drives the rod to move outward. The rod drives the fixed plate, horizontal spring A, movable plate, clamping oil cylinder and arc-shaped clamping block to move outward synchronously. The two arc-shaped clamping blocks move toward the two anchor rods respectively. When the two piston rods of the double-acting oil cylinder are fully extended, the two arc-shaped clamping blocks adaptively clamp onto the outside of the two anchor rods respectively. At this time, the chucks of the two clamping oil cylinders are respectively sleeved on the outside of the tails of the two U-shaped parts of the connecting piece. At the same time, the axis of the open arc strip and the axis of the anchor rod are in the same horizontal plane, and the axis of the open arc strip is parallel to the axis of the anchor rod;

[0034] S5. Control the two clamping cylinders to start, and both clamping cylinders drive the chucks connected to them to close, and the chucks clamp the tail of the U-shaped piece. At this time, the tails of the two U-shaped pieces of the connecting piece are clamped by the chucks of the two clamping cylinders respectively;

[0035] S6. The piston rods of the feed cylinders of the two welding assemblies are controlled to retract inward, and the piston rods drive the L-plate to move inward. The L-plate drives the vertical screw nut pair, the shift plate, the open arc strip, the slider, the tension spring, the support plate, and the welding head to move inward synchronously. At the same time, the L-plate also drives the pressure wheel to move toward the movable plate.

[0036] As the piston rod of the feed cylinder continues to retract inward, the pressure wheel presses on the movable plate, and the movable plate compresses the horizontal spring A relative to the stationary rod. The movable plate also drives the clamping cylinder to move inward, and the clamping cylinder's chuck gradually pulls the tail of the U-shaped piece inward;

[0037] When the piston rod of the feed cylinder is fully retracted, the axis of the open arc strip coincides with the axis of the anchor rod, and the welding head faces the U-shaped piece on the left side of the connector. At the same time, the tail of the U-shaped piece is straightened to eliminate the gap between the U-shaped piece and the outer surface of the anchor rod.

[0038] S7, controlling the laser welding machines of the two welding assemblies to start, and directing the laser beam generated by the welding head toward the outer surface of the U-shaped piece, thereby preliminarily welding the U-shaped piece to the anchor rod;

[0039] S8. Control the vertical screw-nut pair of the two welding assemblies to start, the nut of the vertical screw-nut pair moves downward, the nut drives the dial plate to move downward, the dial plate presses the pin shaft downward, the pin shaft presses the support plate downward, the support plate rotates relative to the axis of the open arc strip, and at the same time, the support plate drives the slider to rotate relative to the axis of the open arc strip, and the slider drives the welding head to rotate relative to the axis of the open arc strip. When the nut of the vertical screw-nut pair moves to the lower limit position, the welding head just rotates to the set position, thereby forming an arc-shaped weld scar on the outer surface of the U-shaped part, and then the two U-shaped parts of the connecting part are respectively welded to the two anchor rods, thereby finally achieving a connecting part welded between the outer ends of the two anchor rods;

[0040] S9. The worker repeats steps S1 to S8 for several times, and a connecting piece is welded at the outer ends of each two adjacent anchor rods.

[0041] The present invention has the following advantages: the connecting piece can be firmly welded between the two anchor rods, and the welding efficiency of the connecting piece and the two anchor rods is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of a cement layer and a row of anchor bolts constructed on the inner wall of a highway tunnel;

[0043] Figure 2 for Figure 1 CC cross-sectional view;

[0044] Figure 3 is a structural diagram of the connecting piece;

[0045] Figure 4 for Figure 3 The main view;

[0046] Figure 5 A schematic diagram of putting two U-shaped pieces on the connecting piece onto the outer ends of the two anchor rods from front to back;

[0047] Figure 6 A schematic diagram of the laser welding machine with the welding head directed toward the left U-shaped piece of the connecting piece;

[0048] Figure 7 A schematic diagram of a worker rotating the welding head relative to the U-shaped member;

[0049] Figure 8 It is a structural schematic diagram of the present invention;

[0050] Figure 9 for Figure 8 A schematic cross-sectional view of

[0051] Figure 10 It is a structural diagram of the positioning and clamping components;

[0052] Figure 11 for Figure 10 A schematic cross-sectional view of

[0053] Figure 12 This is a schematic diagram of the connection between the arc-shaped clamping block, rod, double-acting cylinder, clamping cylinder and fixed plate;

[0054] Figure 13 It is a structural diagram of the welding assembly;

[0055] Figure 14 for Figure 13 The main view;

[0056] Figure 15 It is a schematic diagram of the connection between the open arc strip, slider, welding head and support plate;

[0057] Figure 16 Schematic diagram of the structure of the dial plate;

[0058] Figure 17 This is a schematic diagram of a double-acting cylinder located directly below the area enclosed by two anchor rods;

[0059] Figure 18 It is a schematic diagram of the arc-shaped clamping block and the anchor rod facing each other;

[0060] Figure 19 A schematic diagram of two arc-shaped clamping blocks adaptively clamping onto the outside of two anchor rods;

[0061] Figure 20 A schematic diagram showing the tails of the two U-shaped parts of the connector being clamped by the clamping heads of the two clamping cylinders;

[0062] Figure 21 for Figure 20 A partial enlarged view of the D portion;

[0063] Figure 22 Schematic diagram showing that the axis of the open arc strip coincides with the axis of the anchor rod;

[0064] Figure 23 It is a schematic diagram of the welding head rotating downward to the set position;

[0065] In the picture:

[0066] 1- cement layer, 2- anchor rod, 3- connector, 4- plate, 5- U-shaped piece, 6- laser welding machine, 7- welding head;

[0067] 8-mobile trailer, 9-positioning and clamping assembly, 10-welding assembly;

[0068] 11-Lifting cylinder, 12-Lifting platform, 13-Guide rail, 14-Slide, 15-Sleeve, 16-Spindle, 17-Turntable, 18-Torsion spring, 19-Vertical plate, 20-Double-acting cylinder, 21-Rod, 22-Arc-shaped clamping block, 23-Fixed plate, 24-Movable plate, 25-Horizontal spring A, 26-Clamping cylinder, 27-Chuck, 28-Horizontal spring B;

[0069] 29-feed cylinder, 30-L plate, 31-open arc bar, 32-slider, 33-support plate, 34-pin shaft, 35-tension spring, 36-vertical screw nut pair, 37-nut, 38-push plate, 39-strip groove, 40-pressure wheel. DETAILED DESCRIPTION

[0070] The present invention will be further described below with reference to the accompanying drawings, and the protection scope of the present invention is not limited to the following:

[0071] like Figures 8 to 16 The figure shows a welding device for welding connectors between multiple anchor rods on the inner wall of a highway tunnel. The device includes a mobile trailer 8 equipped with a positioning and clamping assembly 9 for clamping the tail ends of both U-shaped members 5 of a connector 3. Welding assemblies 10 are provided on both the left and right sides of the positioning and clamping assembly 9 for pulling the tail ends of the U-shaped members 5 of the connector 3 inward to weld the U-shaped members 5 to the anchor rods 2. A handle is fixed to the right end surface of the mobile trailer 8. The two welding assemblies 10 are symmetrically arranged about the vertical plate 19 of the positioning and clamping assembly 9.

[0072] The positioning and clamping assembly 9 includes a lifting cylinder 11 fixed on the bottom surface of the mobile trailer 8, the piston rod of the lifting cylinder 11 passes through the mobile trailer 8 upward and a lifting platform 12 is fixed on the extended end, a guide rail 13 is fixed on the top surface of the lifting platform 12, a slide 14 is slidably mounted on the guide rail 13, a main shaft 16 is rotatably mounted on the top surface of the slide 14 via a shaft sleeve 15, a turntable 17 is fixed on the top of the main shaft 16, a torsion spring 18 is sleeved on the main shaft 16, two legs of the torsion spring 18 are respectively fixed on the shaft sleeve 15 and the turntable 17, and a vertical plate 19 is fixed on the top of the turntable 17 and a double-acting cylinder 20; the left and right piston rods of the double-acting cylinder 20 are fixed with rods 21 on their acting ends, the outer ends of the two rods 21 are fixed with arc-shaped clamping blocks 22, and the two rods 21 are welded with fixed plates 23 opposite to the arc-shaped clamping blocks 22, and a sliding sleeve on the rod 21 is provided with a movable plate 24 located between the arc-shaped clamping block 22 and the fixed plate 23, and a horizontal spring A25 is fixed between the movable plate 24 and the fixed plate 23, and a clamping cylinder 26 located below the arc-shaped clamping block 22 is fixed on the outer end surface of the movable plate 24, and the clamping head 27 of the clamping cylinder 26 faces outward.

[0073] Limit plates are fixed to the top surfaces of the left and right ends of the guide rail 13. Horizontal springs B28 are fixed between the two limit plates and the side end surfaces of the slide 14. The two rods 21 are symmetrically arranged about the cylinder body of the double-acting cylinder 20. The two clamping cylinders 26 are symmetrically arranged about the cylinder body of the double-acting cylinder 20. The two arc-shaped clamping blocks 22 are symmetrically arranged about the cylinder body of the double-acting cylinder 20.

[0074] The welding assembly 10 on the left side includes a feed cylinder 29 fixed on the left end surface of the vertical plate 19 and an L-plate 30 fixed on the active end of the piston rod of the feed cylinder 29. An open arc strip 31 is fixed on the top of the vertical plate of the L-plate 30. The axis of the open arc strip 31 is in the same horizontal plane as the axis of the arc-shaped clamping block 22, and the axis of the open arc strip 31 is parallel to the axis of the arc-shaped clamping block 22. A slider 32 is slidably sleeved on the open arc strip 31, and a support plate 33 is fixed on the top surface of the slider 32. A pin 34 is fixed on the front end surface of the upper end of the support plate 33. A welding head 7 is fixed on the top surface of the slider 32, and the welding head 7 is arranged along the radial direction of the open arc strip 31. A tension spring 35 is also sleeved on the open arc strip 31. One end of the tension spring 35 is fixed on the top end of the open arc strip 31, and the other end is fixed on the slider 32.

[0075] The horizontal plate of the L-shaped plate 30 is provided with a vertical screw-nut pair 36. A shift plate 38 is fixed to the nut 37 of the vertical screw-nut pair 36. The shift plate 38 has a strip groove 39 formed therein. The strip groove 39 of the shift plate 38 is sleeved onto the outside of the pin 34 of the support plate 33. A pressure wheel 40 is also rotatably mounted on the inner end surface of the vertical plate of the L-shaped plate 30. A laser welder 6 is fixed to the outer end surface of the vertical screw-nut pair 36. The output port of the laser welder 6 is connected to the welding head 7.

[0076] The welding device also includes a controller, which is connected to the lifting cylinder 11, the double-acting cylinder 20, the feed cylinder 29, the clamping cylinder 26, the vertical screw nut pair 36, and the laser welding machine 6. Workers can use the controller to control the extension or retraction of the piston rods of the lifting cylinder 11, the double-acting cylinder 20, and the feed cylinder 29, and can also control the start or shut down of the clamping cylinder 26, the vertical screw nut pair 36, and the laser welding machine 6. When the clamping cylinder 26 is closed, the chuck 27 on the clamping cylinder 26 is closed; when the laser welding machine 6 is started, the welding head 7 emits a laser beam.

[0077] A method for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel comprises the following steps:

[0078] S1, the worker takes out a Figure 3~Figure 4 The connecting member 3 shown in FIG. 1 is used to sleeve the two U-shaped members 5 on the connecting member 3 onto the outer ends of the two anchor rods 2 from front to back. Figure 5 As shown;

[0079] S2. The worker drags the handle to move the mobile trailer 8 on the ground. When the worker observes that the double-acting cylinder 20 of the positioning and clamping assembly 9 is just below the area surrounded by the two anchor rods 2, Figure 17 As shown, the worker stops dragging the handle;

[0080] S3, the piston rod of the lifting cylinder 11 of the control positioning and clamping assembly 9 extends upward, and the piston rod drives the lifting platform 12 to move upward, and the lifting platform 12 drives the guide rail 13, the slide 14, the main shaft 16, the vertical plate 19 and the double-acting cylinder 20 to move upward synchronously, and then drives the two rods 21 and the arc-shaped clamping block 22 to move upward synchronously. When the worker observes that the arc-shaped clamping block 22 is opposite to the anchor rod 2, as shown in FIG. Figure 18 As shown, the worker controls the lifting cylinder 11 to close;

[0081] S4. Control the two piston rods of the double-acting oil cylinder 20 to extend outward, and the piston rod drives the rod 21 to move outward. The rod 21 drives the fixed plate 23, the horizontal spring A25, the movable plate 24, the clamping oil cylinder 26 and the arc-shaped clamping block 22 to move outward synchronously. The two arc-shaped clamping blocks 22 move toward the two anchor rods 2 respectively. When the two piston rods of the double-acting oil cylinder 20 are fully extended, the two arc-shaped clamping blocks 22 are adaptively clamped to the outside of the two anchor rods 2, as shown in FIG. Figure 19 As shown, at this time, the clamping heads 27 of the two clamping cylinders 26 are respectively sleeved on the outside of the tails of the two U-shaped parts 5 of the connecting member 3. At the same time, the axis of the open arc strip 31 and the axis of the anchor rod 2 are in the same horizontal plane and parallel to the axis of the anchor rod 2.

[0082] S5, control the two clamping oil cylinders 26 to start, and the two clamping oil cylinders 26 drive the clamps 27 connected thereto to close, and the clamps 27 clamp the tail of the U-shaped piece 5. At this time, the tails of the two U-shaped pieces 5 of the connecting piece 3 are clamped by the clamps 27 of the two clamping oil cylinders 26 respectively. Figure 20-21 As shown;

[0083] S6. The piston rods of the feed cylinders 29 of the two welding assemblies 10 are controlled to retract inward, and the piston rods drive the L-plate 30 to move inward. The L-plate 30 drives the vertical screw nut pair 36, the shift plate 38, the open arc bar 31, the slider 32, the tension spring 35, the support plate 33, and the welding head 7 to move inward synchronously. At the same time, the L-plate 30 also drives the pressure wheel 40 to move toward the movable plate 24.

[0084] As the piston rod of the feed cylinder 29 continues to retract inward, the pressing wheel 40 presses onto the movable plate 24. Figure 22As shown, the movable plate 24 compresses the horizontal spring A25 relative to the stationary rod 21, and the movable plate 24 also drives the clamping cylinder 26 to move inward, and the clamping head 27 of the clamping cylinder 26 gradually pulls the tail of the U-shaped member 5 inward;

[0085] When the piston rod of the feed cylinder 29 is fully retracted, the axis of the open arc strip 31 coincides with the axis of the anchor rod 2. Figure 22 As shown, the welding head 7 is directed toward the U-shaped member 5 on the left side of the connecting member 3. At the same time, the tail of the U-shaped member 5 is straightened to eliminate the gap between the U-shaped member 5 and the outer surface of the anchor rod 2.

[0086] Among them, it can be seen from step S6 that since the tail of the U-shaped member 5 has been straightened, the gap between the U-shaped member 5 and the outer surface of the anchor rod 2 is eliminated in advance. Therefore, it is ensured that in the subsequent welding process, the U-shaped member 5 is welded in a close contact state with the anchor rod 2, and the U-shaped member 5 is fully welded on the anchor rod 2, thereby enabling the connecting member 3 to be firmly welded between the two anchor rods 2. Compared with the above, Figures 5 to 7 The welding method shown serves to increase the connection strength between the anchor rods 2 .

[0087] S7, controlling the laser welding machines 6 of the two welding assemblies 10 to start, and directing the laser beam generated by the welding head 7 toward the outer surface of the U-shaped member 5, thereby preliminarily welding the U-shaped member 5 to the anchor rod 2;

[0088] S8. Control the vertical screw nut pair 36 of the two welding assemblies 10 to start, and the nut 37 of the vertical screw nut pair 36 moves downward. The nut 37 drives the dial plate 38 to move downward. The dial plate 38 presses the pin 34 downward, and the pin 34 presses the support plate 33 downward. The support plate 33 rotates relative to the axis of the open arc strip 31. At the same time, the support plate 33 drives the slider 32 to rotate relative to the axis of the open arc strip 31, and the slider 32 drives the welding head 7 to rotate relative to the axis of the open arc strip 31. When the nut 37 of the vertical screw nut pair 36 moves to the lower limit position, the welding head 7 just rotates to the set position. The rotation direction of the welding head 7 is as follows: Figure 23 As shown by the solid arrow in the middle, an arc-shaped weld scar is formed on the outer surface of the U-shaped member 5, and then the two U-shaped members 5 of the connecting member 3 are welded to the two anchor rods 2 respectively, thereby finally achieving a connecting member 3 welded between the outer ends of the two anchor rods 2;

[0089] S9. The worker repeats steps S1 to S8 for several times, and a connecting piece 3 is welded on the outer ends of every two adjacent anchor rods 2.

[0090] Among them, first in step S4, by controlling the retraction of the two piston rods of the double-acting cylinder 20, the two arc-shaped clamping blocks 22 are respectively clamped on the two anchor rods 2, so that the axis of the open arc strip 31 and the axis of the anchor rod 2 are in the same horizontal plane, and the axis of the open arc strip 31 is parallel to the axis of the anchor rod 2; then in step S6, by controlling the retraction of the piston rod of the feed cylinder 29, the axis of the open arc strip 31 is just coincident with the axis of the anchor rod 2; finally in step S8, by controlling the nut 37 of the vertical screw nut pair 36 to move downward, the welding head 7 is rotated relative to the axis of the open arc strip 31, thereby forming an arc-shaped weld scar on the outer surface of the U-shaped part 5, and then the two U-shaped parts 5 of the connecting part 3 are respectively welded to the two anchor rods 2, thereby finally realizing the welding of a connecting part 3 between the outer ends of the two anchor rods 2.

[0091] It can be seen from this that the welding head 7 is rotated relative to the axis of the open arc strip 31, that is, the welding head 7 is rotated relative to the axis of the anchor rod 2, thereby ensuring that the distance H between the end of the welding head 7 and the outer surface of the U-shaped member 5 is always constant, thereby ensuring that the thickness of the arc weld scar formed after welding is uniform, and realizing that the U-shaped member 5 is fully welded on the anchor rod 2, thereby being able to firmly weld the connecting member 3 between the two anchor rods 2, compared to Figures 5 to 7 The welding method shown here serves to increase the connection strength between the anchor rods 2.

[0092] In addition, the present welding device can automatically weld the two U-shaped parts 5 of the connecting member 3 to the two anchor rods 2 at the same time through the linkage cooperation of the two welding components 10 and the positioning and clamping components 9. Figures 5 to 7 The welding method shown does not need to be divided into two separate processes, thereby achieving welding of a connector 3 between two anchor rods 2 in a short time, thereby greatly improving the welding efficiency of the connector 3 and the two anchor rods 2.

Claims

1. A welding device for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel, characterized by: It comprises a mobile trailer (8), the mobile trailer (8) is provided with a positioning and clamping assembly (9) for clamping the tails of the two U-shaped members (5) of the connecting member (3), and the left and right sides of the positioning and clamping assembly (9) are both provided with welding assemblies (10) for pulling the tails of the U-shaped members (5) of the connecting member (3) inward and welding the U-shaped members (5) to the anchor rod (2); The positioning and clamping assembly (9) includes a lifting cylinder (11) fixed on the bottom surface of the mobile trailer (8), a piston rod of the lifting cylinder (11) passes through the mobile trailer (8) upward and a lifting platform (12) is fixed on the extended end, a guide rail (13) is fixed on the top surface of the lifting platform (12), a slide (14) is slidably mounted on the guide rail (13), a main shaft (16) is rotatably mounted on the top surface of the slide (14) via a shaft sleeve (15), a turntable (17) is fixed on the top of the main shaft (16), a torsion spring (18) is sleeved on the main shaft (16), two legs of the torsion spring (18) are respectively fixed on the shaft sleeve (15) and the turntable (17), and a vertical plate (19) and a double-acting cylinder (20) are fixed on the top of the turntable (17) in sequence; The left and right piston rods of the double-acting oil cylinder (20) are both fixed with rods (21) on their action ends, and arc-shaped clamping blocks (22) are both fixed on their outer ends. A fixed plate (23) opposite to the arc-shaped clamping blocks (22) is welded on both rods (21). A movable plate (24) located between the arc-shaped clamping blocks (22) and the fixed plate (23) is provided on the sliding sleeve of the rod (21). A horizontal spring A (25) is fixed between the movable plate (24) and the fixed plate (23). A clamping oil cylinder (26) located below the arc-shaped clamping blocks (22) is fixed on the outer end surface of the movable plate (24), and a clamping head (27) of the clamping oil cylinder (26) faces outward. The welding assembly (10) on the left side includes a feed oil cylinder (29) fixed on the left end surface of the vertical plate (19), and an L-plate (30) fixed on the action end of the piston rod of the feed oil cylinder (29). An open arc strip (31) is fixed on the top of the vertical plate of the L-plate (30). The axis of the open arc strip (31) and the axis of the arc-shaped clamping block (22) are on the same horizontal plane, and the axis of the open arc strip (31) and the axis of the arc-shaped clamping block (22) are parallel; the open arc strip (31) The upper sliding sleeve is provided with a slider (32), a support plate (33) is fixed on the top surface of the slider (32), a pin (34) is fixed on the front end surface of the upper end of the support plate (33), a welding head (7) is fixed on the top surface of the slider (32), and the welding head (7) is arranged along the radial direction of the opening arc strip (31); the opening arc strip (31) is also sleeved with a tension spring (35), one end of the tension spring (35) is fixed on the top end of the opening arc strip (31), and the other end is fixed on the slider (32); A vertical screw nut pair (36) is provided on the horizontal plate of the L plate (30), a shift plate (38) is fixed on the nut (37) of the vertical screw nut pair (36), a strip groove (39) is provided in the shift plate (38), and the strip groove (39) of the shift plate (38) is sleeved on the outside of the pin shaft (34) of the support plate (33); a pressure wheel (40) is also rotatably mounted on the inner end surface of the vertical plate of the L plate (30), and the pressure wheel (40) presses on the movable plate (24).

2. A welding device for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel according to claim 1, characterized in that: Limiting plates are fixedly provided on the top surfaces of the left and right ends of the guide rail (13), and horizontal springs B (28) are fixedly provided between the two limiting plates and the side end surfaces of the slide (14).

3. A welding device for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel according to claim 2, characterized in that: The two rods (21) are symmetrically arranged with respect to the cylinder body of the double-acting oil cylinder (20), the two clamping oil cylinders (26) are symmetrically arranged with respect to the cylinder body of the double-acting oil cylinder (20), and the two arc-shaped clamping blocks (22) are symmetrically arranged with respect to the cylinder body of the double-acting oil cylinder (20).

4. A welding device for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel according to claim 3, characterized in that: A handle is fixedly provided on the right end surface of the mobile trailer (8).

5. The welding device for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel according to claim 4, characterized in that: A laser welding machine (6) is fixedly provided on the outer end surface of the vertical screw nut pair (36), and an output port of the laser welding machine (6) is connected to the welding head (7).

6. The welding device for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel according to claim 5, characterized in that: The two welding assemblies (10) are symmetrically arranged with respect to the vertical plate (19) of the positioning and clamping assembly (9).

7. A welding device for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel according to claim 6, characterized in that: The welding device further comprises a controller, which is connected to the lifting cylinder (11), the double-acting cylinder (20), the feed cylinder (29), the clamping cylinder (26), the vertical screw nut pair (36), and the laser welding machine (6).

8. A method for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel, using the welding device for welding connecting pieces between multiple anchor rods on the inner wall of a highway tunnel according to claim 7, characterized in that: It includes the following steps: S1. A worker takes out a connecting piece (3) and puts the two U-shaped pieces (5) on the connecting piece (3) onto the outer ends of the two anchor rods (2) from front to back; S2. The worker drags the handle to move the mobile trailer (8) on the ground. When the worker observes that the double-acting cylinder (20) of the positioning and clamping assembly (9) is just below the area enclosed by the two anchor rods (2), the worker stops dragging the handle; S3, the piston rod of the lifting cylinder (11) of the control positioning and clamping assembly (9) extends upward, and the piston rod drives the lifting platform (12) to move upward, and the lifting platform (12) drives the guide rail (13), the slide (14), the main shaft (16), the vertical plate (19) and the double-acting cylinder (20) to move upward synchronously, thereby driving the two rods (21) and the arc-shaped clamping block (22) to move upward synchronously. When the worker observes that the arc-shaped clamping block (22) is opposite to the anchor rod (2), the worker controls the lifting cylinder (11) to close; S4. Control the two piston rods of the double-acting oil cylinder (20) to extend outward, and the piston rod drives the rod (21) to move outward. The rod (21) drives the fixed plate (23), the horizontal spring A (25), the movable plate (24), the clamping oil cylinder (26) and the arc-shaped clamping block (22) to move outward synchronously. The two arc-shaped clamping blocks (22) move toward the two anchor rods (2) respectively. When the two piston rods of the double-acting oil cylinder (20) are fully extended, the two arc-shaped clamping blocks (22) are adaptively clamped to the outside of the two anchor rods (2). At this time, the clamping heads (27) of the two clamping oil cylinders (26) are respectively sleeved on the outside of the tails of the two U-shaped parts (5) of the connecting part (3). At the same time, the axis of the open arc strip (31) and the axis of the anchor rod (2) are on the same horizontal plane, and the axis of the open arc strip (31) and the axis of the anchor rod (2) are parallel to the axis of the anchor rod (2); S5, control the two clamping oil cylinders (26) to start, and the two clamping oil cylinders (26) drive the clamps (27) connected thereto to close, and the clamps (27) clamp the tail of the U-shaped member (5). At this time, the tails of the two U-shaped members (5) of the connecting member (3) are clamped by the clamps (27) of the two clamping oil cylinders (26) respectively; S6, the piston rods of the feed oil cylinders (29) of the two welding assemblies (10) are retracted inward, and the piston rods drive the L-plate (30) to move inward, and the L-plate (30) drives the vertical screw nut pair (36), the dial plate (38), the open arc strip (31), the slider (32), the tension spring (35), the support plate (33) and the welding head (7) to move inward synchronously, and at the same time, the L-plate (30) also drives the pressure wheel (40) to move toward the movable plate (24); As the piston rod of the feed cylinder (29) continues to retract inward, the pressure wheel (40) presses the movable plate (24), and the movable plate (24) compresses the horizontal spring A (25) relative to the stationary rod (21), and the movable plate (24) also drives the clamping cylinder (26) to move inward, and the clamping head (27) of the clamping cylinder (26) gradually pulls the tail of the U-shaped member (5) inward; When the piston rod of the feed cylinder (29) is fully retracted, the axis of the open arc strip (31) coincides with the axis of the anchor rod (2), and the welding head (7) faces the left U-shaped piece (5) of the connecting piece (3). At the same time, the tail of the U-shaped piece (5) is straightened to eliminate the gap between the U-shaped piece (5) and the outer surface of the anchor rod (2); S7, controlling the laser welding machines (6) of the two welding assemblies (10) to start, and directing the laser beam generated by the welding head (7) toward the outer surface of the U-shaped member (5), thereby preliminarily welding the U-shaped member (5) to the anchor rod (2); S8, control the vertical screw nut pair (36) of the two welding assemblies (10) to start, the nut (37) of the vertical screw nut pair (36) moves downward, the nut (37) drives the dial plate (38) to move downward, the dial plate (38) presses the pin (34) downward, the pin (34) presses the support plate (33) downward, the support plate (33) rotates relative to the axis of the open arc strip (31), and at the same time, the support plate (33) drives the slider (32) to rotate relative to the axis of the open arc strip (31), the slider (32) drives the welding head (7) to rotate relative to the axis of the open arc strip (31). When the nut (37) of the vertical screw nut pair (36) moves to the lower limit position, the welding head (7) just rotates to the set position, thereby forming an arc-shaped weld scar on the outer surface of the U-shaped member (5), and then welding the two U-shaped members (5) of the connecting member (3) to the two anchor rods (2) respectively, thereby finally achieving a connecting member (3) welded between the outer ends of the two anchor rods (2); S9. The worker repeats steps S1 to S8 for several times, and a connecting piece (3) is welded on the outer ends of each two adjacent anchor rods (2).

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