Automatic welding system for threaded steel bars for tunnels

Abstract

The present application relates to the technical field of welding, and discloses an automatic threaded steel bar welding system for a tunnel, which comprises a base, vertical blocks are arranged on the surface of the base, guide blocks are arranged between the two vertical blocks, a rotating shaft is rotatably connected between the two vertical blocks, a plurality of clamping portions are equidistantly arranged on the rotating shaft along the axial direction of the rotating shaft, the clamping portion comprises a threaded segment symmetrically arranged on the rotating shaft and a clamping block threadedly connected with the threaded segment, the clamping block is slidably connected with the guide block, and the movement directions of the two clamping blocks of each clamping portion are opposite; a first inclined surface for abutting against the threaded steel bar is arranged at the bottom of the clamping block; a plurality of grooves for placing the threaded steel bar are equidistantly arranged on the surface of the base along the length direction of the base, and each groove is located between the two clamping blocks of each clamping portion; the automatic threaded steel bar welding system further comprises a welding mechanism and a driving mechanism for driving the rotating shaft to rotate. The present application mainly solves the problem that the existing equipment has a complicated operation mode for clamping and positioning multiple steel bars.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically to an automatic welding system for threaded steel bars used in tunnels. Background Technology

[0002] Threaded steel bars are a common name for hot-rolled ribbed steel bars, a very common type of steel reinforcement. Threaded steel bars are essential steel for medium-sized and larger building components. China imports a certain amount of threaded steel bars every year, and exports are increasing daily. During tunnel construction, welding of threaded steel bars is often required depending on the construction needs. However, the traditional method of positioning threaded steel bars involves workers simply pressing them into place. This method easily leads to misalignment of the welding position and requires handling of defective products resulting from welding errors, increasing workload and affecting work efficiency.

[0003] To address the aforementioned issues, Chinese Patent Publication No. CN218426511U discloses a rebar welding positioning device, comprising a bottom fixed mounting plate and at least two clamping assemblies fixedly mounted on the upper surface of the bottom fixed mounting plate. Each clamping assembly includes a clamp positioning seat and a positioning sleeve fastened to the clamp positioning seat. A support spring and a bottom clamp are sequentially connected from bottom to top to the inner side of the top of the clamp positioning seat. Oppositely arranged side clamps are slidably connected to the inner sides of both sides of the clamp positioning seat, with the tops of the side clamps corresponding to the tops of the bottom clamp. The positioning sleeve is U-shaped, with an installation space in the middle for mounting the clamp positioning seat. The installation space also accommodates the slidable mounting of the two oppositely arranged side clamps. This patent enables the positioning of simple rebars and prevents rebar wobbling during welding, improving welding efficiency and thus increasing overall work efficiency.

[0004] In actual use, the above-mentioned patent requires manual adjustment of the position of the two side clamps to achieve contact with the steel bars, and manual adjustment of the position of the bolts to position the side clamps, thereby using the two side clamps to clamp and position the steel bars. However, tunnel construction sites usually require welding multiple steel bars. If the above-mentioned manual adjustment method is used to clamp and position each steel bar one by one, the operation is very cumbersome and the work efficiency is low. Summary of the Invention

[0005] The present invention aims to provide an automatic welding system for threaded steel bars used in tunnels, so as to solve the problem of cumbersome operation of existing equipment for clamping and positioning multiple steel bars.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic welding system for threaded steel bars used in tunnels, comprising a base, with upright blocks on both sides of the base surface, a guide block between two upright blocks, and a rotating shaft rotatably connected between the two upright blocks. A plurality of clamping portions are equidistantly arranged along the axial direction of the rotating shaft. Each clamping portion includes a threaded segment symmetrically arranged on the rotating shaft and a clamping block threadedly connected to the threaded segment. The clamping blocks are slidably connected to the guide block, and the two clamping blocks in each clamping portion move in opposite directions. The bottom of the clamping block is provided with a first inclined surface for abutting against the threaded steel bar. A plurality of grooves for placing the threaded steel bar are equidistantly arranged along the length of the base surface, each groove being located between two clamping blocks in each clamping portion. The system also includes a welding mechanism and a driving mechanism for rotating the rotating shaft.

[0007] The principles and advantages of this scheme are:

[0008] 1. This solution places several threaded steel bars one by one into a groove, which supports the threaded steel bars. A drive mechanism rotates the shaft, causing the two clamping blocks of each clamping part to approach each other under the action of the threaded section and guide block. During the approach of the two clamping blocks, both clamping blocks move towards the threaded steel bars, so that the first inclined surface of the two clamping blocks abuts against the threaded steel bars, that is, the two clamping blocks clamp and position the threaded steel bars. Then, a welding mechanism is used to weld the threaded steel bars. Compared with the existing technology, this solution can drive multiple clamping parts to clamp and position multiple threaded steel bars simultaneously through the rotation of the shaft, that is, to achieve automatic positioning of multiple threaded steel bars, avoiding the manual adjustment of clamping and positioning each steel bar one by one, making the operation simpler and improving work efficiency.

[0009] 2. Since the first inclined surface of this scheme abuts against the threaded steel bar, the clamping block can also press the threaded steel bar, thereby enhancing the positioning effect of the threaded steel bar.

[0010] Furthermore, the base is provided with several limiting parts and several adjusting parts at equal intervals along its length. The limiting part includes two bottom blocks and elastic blocks located on both sides of the groove. The two bottom blocks are fixedly connected to the bottom of the two clamping blocks of each clamping part. The side wall of the bottom block is provided with a side groove vertically, and a lifting block is slidably connected in the side groove. The elastic blocks are arc-shaped, and the protrusions of the two elastic blocks are arranged laterally opposite each other. One end of the elastic block is fixedly connected to the base, and the other end of the elastic block is fixedly connected to the lifting block. When the two clamping blocks of each clamping part approach or move away, the adjusting part simultaneously drives the two lifting blocks of each limiting part to move vertically.

[0011] With the above settings, when the two clamping blocks are close together, the two clamping blocks drive the two bottom blocks to move synchronously, that is, the two bottom blocks also move closer together; when the bottom blocks move laterally, the bottom blocks drive the lifting blocks to move laterally synchronously, and the adjustment part simultaneously drives the two lifting blocks of each limit part to move downward, that is, when the bottom blocks move laterally, the lifting blocks move both laterally and vertically.

[0012] During the horizontal and vertical movements of the lifting block, the horizontal movement of the lifting block can bring the upper end of the elastic block closer to the threaded steel bar, thereby bringing the elastic block closer to the threaded steel bar; at the same time, the vertical movement of the lifting block can bring the two ends of the elastic block closer, thereby increasing the amplitude of the protruding part of the elastic block, that is, allowing the protruding part of the elastic block to abut against the threaded steel bar; as the lifting block continues to move, the protruding part of the elastic block is deformed by the resistance of the threaded steel bar, that is, the two elastic blocks are used to clamp and position the threaded steel bar, thereby strengthening the positioning effect of the threaded steel bar; and, by using the deformed elastic block to abut against the threaded steel bar, the contact area between the two is increased, further strengthening the positioning effect of the threaded steel bar.

[0013] Furthermore, the adjustment part includes top grooves symmetrically opened on the surface of the base, and a groove located between the two top grooves; an inclined groove is provided on the inner wall of the top groove, and the distance between the two inclined grooves gradually decreases from top to bottom; a slider is slidably connected in the inclined groove, and the slider is fixedly connected to the lifting block, which can move horizontally and vertically in the top groove.

[0014] With the above settings, when the two clamping blocks are close together, the two clamping blocks drive the two bottom blocks to move synchronously, that is, the two bottom blocks also move closer together; when the bottom blocks move laterally, the bottom blocks drive the lifting blocks to move laterally synchronously, and the lifting blocks drive the slider to move laterally synchronously. Since the slider slides in the inclined groove, when the slider moves laterally, the slider will also drive the lifting blocks to move downwards. That is, when the bottom blocks move laterally, the lifting blocks move both laterally and vertically.

[0015] Furthermore, the surface of the elastic block is provided with several rubber blocks at equal intervals, and the two sides of the rubber blocks are provided with anti-slip texture.

[0016] With the above setup, when the elastic block comes into contact with the threaded steel bar, the rubber block extends into the gap of the threaded steel bar, thereby limiting the position of the threaded steel bar and preventing it from rotating, thus enhancing the positioning effect of the threaded steel bar; furthermore, the rubber block contacts the inner walls on both sides of the gap, and the anti-slip texture increases the friction between the two, thereby enhancing the limiting effect of the threaded steel bar.

[0017] Furthermore, a solid block is provided on the side wall of the lifting block, and an arc-shaped surface is provided at the end of the solid block away from the bottom block for abutting against the deformed elastic block.

[0018] With the above settings, during the movement of the lifting block, the lifting block will also drive the fixed block to move synchronously. When the clamping block stops, the elastic block deforms and abuts against the threaded steel bar. At the same time, the fixed block abuts against the deformed elastic block. That is, the arc surface abuts against the deformed elastic block. On the one hand, it can support the elastic block, and on the other hand, it can ensure the shape of the elastic block after deformation, thereby ensuring the stability of the elastic block after deformation and the fit with the threaded steel bar. That is, it improves the stability of the two elastic blocks clamping and positioning the threaded steel bar.

[0019] Furthermore, a number of positioning parts are equidistantly arranged along the length of the base. Each positioning part includes a cavity inside the base and a guide groove on the side wall of the base. The cavity communicates with two top grooves of each adjustment part. A vertical groove is provided at the bottom of the cavity. A first wedge block is slidably connected in the vertical groove. A first spring is provided between the first wedge block and the cavity. A positioning groove is provided on the side wall of the first wedge block. A transverse block is provided at the top of the first wedge block. Limiting grooves are provided on both sides of the transverse block. A limiting block is provided on the side wall of the lifting block. The limiting block is slidably engaged with the limiting groove. The limiting block can move laterally and vertically in the top groove and the cavity. The transverse block is located on the movement trajectory of the pressing block. A second wedge block for being pressed by the first wedge block is slidably connected in the guide groove. A second spring is provided between the second wedge block and the base. The second wedge block is slidably engaged with the positioning groove.

[0020] With the above settings, the lifting block can move horizontally and vertically, that is, the direction of movement of the lifting block is inclined. During the inclined movement of the lifting block, the lifting block drives the limiting block to move synchronously. Since the limiting block is in sliding fit with the limiting groove, the limiting block can slide in the limiting groove. At the same time, the limiting block will also drive the horizontal block to move downward, and the horizontal block will drive the first wedge block to move downward as well, and the first spring will be compressed. When the clamping block is stopped, the lifting block also stops, and then the first wedge block also stops.

[0021] During the downward movement of the first wedge, the first wedge compresses the second wedge, causing it to move outward, and the second spring is stretched. The first wedge continues to move downward, causing the second wedge to abut against the side wall of the first wedge. The first wedge continues to move downward, and when the clamping block stops, the lifting block also stops, and consequently, the first wedge also stops. At this time, the second wedge is laterally opposite to the positioning groove. Under the action of the second spring, the second wedge extends into the positioning groove, thereby positioning the first wedge and the lateral block. Then, the lifting block is positioned by the limiting block, that is, the upper end of the elastic block is positioned, ensuring the stability of the elastic block abutting against the threaded steel bar, thereby improving the stability of the positioning of the threaded steel bar.

[0022] Furthermore, it also includes a movable block, with the second wedge block fixedly connected to the movable block.

[0023] With the above configuration, the movable block can simultaneously drive several second wedges to move, so that all the second wedges can be moved out of the positioning slot at the same time, and several first wedges can be in a movable state at the same time; the operation is more convenient.

[0024] Furthermore, a second inclined surface is provided on the side of the bottom of the clamping block away from the first inclined surface; several auxiliary parts are provided at equal intervals along the length of the base, and the auxiliary parts are located between two adjacent clamping parts; the auxiliary parts include a driven bevel gear coaxially connected to the rotating shaft, a one-way screw rotatably connected to the base, and a vertical rod fixed to the base, and a driving bevel gear meshing with the driven bevel gear is fixedly connected to the one-way screw; a double wedge block for abutting against the second inclined surface is threadedly connected to the one-way screw, the double wedge block is slidably connected to the vertical rod, and the second inclined surface is located on the movement trajectory of the double wedge block. With the above configuration, during the rotation of the shaft, the shaft drives the active bevel gear to rotate. The active bevel gear meshes with the driven bevel gear, driving the driven bevel gear to rotate. The driven bevel gear drives the one-way screw to rotate, causing the double wedge block to move upward, that is, the double wedge block moves towards the second inclined surface. The double wedge block continues to move. When the shaft stops, the double wedge block also stops. At this time, the double wedge block simultaneously abuts against the two adjacent inclined wedge surfaces of the two adjacent clamping parts. This ensures the stability of the first inclined surface of the two adjacent clamping parts abutting against the threaded steel bar, that is, improves the stability of the positioning of the threaded steel bar. Attached Figure Description

[0025] Figure 1 This is a front view of an embodiment of the automatic welding system for threaded steel bars used in tunnels according to the present invention;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 for Figure 1 A partial sectional view from the front view direction;

[0028] Figure 4 for Figure 3 Enlarged view at point B in the middle;

[0029] Figure 5 for Figure 4 Enlarged view at point C;

[0030] Figure 6 for Figure 1 A partial sectional view of the central base from the left. Detailed Implementation

[0031] The following detailed description illustrates the specific implementation method:

[0032] The reference numerals in the accompanying drawings include: base 10, upright block 11, guide block 12, rotating shaft 13, motor 14, threaded section 20, clamping block 21, first inclined surface 22, groove 23, welding machine 30, first cylinder 31, third cylinder 32, support block 33, top seat 34, first moving block 35, second moving block 36, third moving block 37, bottom block 40, elastic block 41, side groove 42, lifting block 43, and top groove 50. 51 Inclined groove, 60 Solid block, 61 Arc surface, 70 Chamber, 71 Guide groove, 72 Vertical groove, 73 First wedge, 74 First spring, 75 Positioning groove, 76 Horizontal block, 761 Limiting groove, 77 Limiting block, 78 Second wedge, 781 Movable block, 79 Second spring, 80 Second inclined surface, 81 Driven bevel gear, 82 One-way screw, 83 Vertical rod, 84 Driven bevel gear, 85 Double wedge block, 90 Threaded steel bar.

[0033] Example

[0034] The basics are as follows: Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 As shown: An automatic welding system for threaded steel bars for tunnels includes a base 10, with upright blocks 11 fixedly connected to both sides of the surface of the base 10, a guide block 12 fixedly connected between the two upright blocks 11, and a rotating shaft 13 rotatably connected between the two upright blocks 11, with the rotating shaft 13 located below the guide block 12.

[0035] A plurality of clamping portions are equidistantly arranged on the rotating shaft 13 along the axial direction of the rotating shaft 13. Each clamping portion includes a threaded section 20 symmetrically arranged on the rotating shaft 13 and a clamping block 21 threadedly connected to the threaded section 20. The clamping block 21 is slidably connected to the guide block 12. The two clamping blocks 21 of each clamping portion move in opposite directions. The bottom of the clamping block 21 is provided with a first inclined surface 22 for abutting against the threaded steel bar 90. A plurality of grooves 23 for placing the threaded steel bar 90 are equidistantly arranged on the surface of the base 10 along the length direction of the base 10. Each groove 23 is located between the two clamping blocks 21 of each clamping portion and is arc-shaped. The base 10 also includes a welding mechanism 30 and a drive mechanism for rotating the rotating shaft 13. The welding mechanism 30 includes a welding machine 30, a first cylinder 31, a second cylinder, a third cylinder 32, and support blocks 3 fixed to both sides of the surface of the base 10. 3. The welding machine 30 uses commonly used equipment on the market. A top seat 34 is fixed between two support blocks 33. The first cylinder 31 is fixed to the top seat 34. A first moving block 35 is fixed to the output shaft of the first cylinder 31. The first moving block 35 moves along the length direction of the top seat 34 and is slidably connected to the top seat 34. The second cylinder is fixed to the first moving block 35. A second moving block 36 is fixed to the output shaft of the second cylinder. The second moving block 36 moves along the width direction of the top seat 34 and is slidably connected to the first moving block 35. The third cylinder 32 is fixed to the second moving block 36. A third moving block 37 is fixed to the output shaft of the third cylinder 32. The moving direction of the third moving block 37 is perpendicular to the top seat 34, that is, the third moving block 37 moves vertically. The welding machine 30 is fixed to the bottom of the third moving block 37. The drive mechanism is motor 14, which is a servo motor 14. Motor 14 is fixed on the vertical block 11, and the output shaft of motor 14 is coaxially connected to the rotating shaft 13.

[0036] The base 10 is provided with several limiting parts and several adjusting parts at equal intervals along its length. The limiting part includes two bottom blocks 40 and elastic blocks 41 located on both sides of the groove 23. The two bottom blocks 40 are fixedly connected to the bottom of the two clamping blocks 21 of each clamping part, that is, the bottom of each clamping block 21 is fixedly connected to the bottom of the bottom block 40. The side wall of the bottom block 40 has a vertical side groove 42, and a lifting block 43 is slidably connected in the side groove 42. The elastic block 41 is an elastic iron block. The elastic block 41 is arc-shaped, and the protrusions of the two elastic blocks 41 are arranged laterally opposite each other. One end of the elastic block 41 is connected to the bottom. The base 10 is fixedly connected, and the other end of the elastic block 41 is fixedly connected to the lifting block 43. When the two clamping blocks 21 of each clamping part approach or move away, the adjusting part simultaneously drives the two lifting blocks 43 of each limiting part to move vertically. The adjusting part includes top grooves 50 symmetrically opened on the surface of the base 10, and grooves 23 are located between the two top grooves 50. An inclined groove 51 is opened on the inner wall of the top groove 50, and the distance between the two inclined grooves 51 gradually decreases from top to bottom. A slider is slidably connected in the inclined groove 51, and the slider is fixedly connected to the lifting block 43. The lifting block 43 can move horizontally and vertically in the top groove 50.

[0037] A fixed block 60 is fixedly connected to the side wall of the lifting block 43. The fixed block 60 has an arc-shaped surface 61 at the end away from the bottom block 40 for abutting against the deformed elastic block 41.

[0038] A plurality of positioning parts are equidistantly arranged within the base 10 along its length. Each positioning part includes a chamber 70 formed inside the base 10 and a guide groove 71 formed on the side wall of the base 10. The chamber 70 communicates with two top grooves 50 of each adjustment part. A vertical groove 72 is formed at the bottom of the chamber 70, and a first wedge 73 is slidably connected within the vertical groove 72. A first spring 74 is fixedly connected between the first wedge 73 and the chamber 70. A positioning groove 75 is formed on the side wall of the first wedge 73; a horizontal [unclear - possibly a type of spring] is fixedly connected to the top of the first wedge 73. Limiting grooves 761 are opened on both sides of the horizontal block 76; a limiting block 77 is fixedly connected to the side wall of the lifting block 43, and the limiting block 77 slides with the limiting groove 761. The limiting block 77 can move horizontally and vertically in the top groove 50 and the chamber 70. The horizontal block 76 is located on the movement trajectory of the pressing block; a second wedge 78 for being pressed by the first wedge 73 is slidably connected in the guide groove 71. A second spring 79 is fixed between the second wedge 78 and the base 10. The second wedge 78 slides with the positioning groove 75.

[0039] The bottom of the clamping block 21 is provided with a second inclined surface 80 on the side away from the first inclined surface 22; the base 10 is provided with a number of auxiliary parts at equal intervals along the length of the base 10, and the auxiliary parts are located between two adjacent clamping parts; the auxiliary parts include a driven bevel gear 81 coaxially connected to the rotating shaft 13, a one-way screw 82 rotatably connected to the base 10, and a vertical rod 83 fixedly connected to the base 10. A driving bevel gear 84 meshing with the driven bevel gear 81 is fixedly connected to the one-way screw 82; a double wedge block 85 for abutting against the second inclined surface 80 is threadedly connected to the one-way screw 82. The double wedge block 85 is slidably connected to the vertical rod 83, and the second inclined surface 80 is located on the movement trajectory of the double wedge block 85.

[0040] The specific implementation process is as follows:

[0041] In use, several threaded steel bars 90 are placed one by one in the groove 23, and the groove 23 supports the threaded steel bars 90. At this time, the threaded steel bars 90 are located between the two clamping blocks 21 and the two elastic blocks 41. Since the groove 23 is arc-shaped, the contact area between the threaded steel bars 90 and the groove 23 is increased, thus improving the support stability.

[0042] When the motor 14 is started, the output shaft of the motor 14 drives the rotating shaft 13 to rotate, causing the two clamping blocks 21 of each clamping part to approach each other under the action of the threaded section 20 and the guide block 12. During the approach of the two clamping blocks 21, both clamping blocks 21 move towards the threaded steel bar 90. When the first inclined surface 22 of both clamping blocks 21 abuts against the threaded steel bar 90, the motor 14 is turned off, thereby stopping the rotating shaft 13, that is, stopping the clamping blocks 21, and then using the two clamping blocks 21 to clamp and position the threaded steel bar 90. Furthermore, since the first inclined surface 22 abuts against the threaded steel bar 90, the clamping blocks 21 can also press against the threaded steel bar 90, thereby strengthening the positioning effect of the threaded steel bar 90.

[0043] When the two clamping blocks 21 are close together, the two clamping blocks 21 drive the two bottom blocks 40 to move synchronously, that is, the two bottom blocks 40 also move closer together; when the bottom blocks 40 move laterally, the bottom blocks 40 drive the lifting block 43 to move laterally synchronously, and the lifting block 43 drives the slider to move laterally synchronously. Since the slider slides in the inclined groove 51, when the slider moves laterally, the slider will also drive the lifting block 43 to move downward. That is, when the bottom blocks 40 move laterally, the lifting block 43 moves both laterally and vertically.

[0044] During the horizontal and vertical movements of the lifting block 43, the horizontal movement of the lifting block 43 can bring the upper end of the elastic block 41 closer to the threaded steel bar 90, thereby bringing the elastic block 41 closer to the threaded steel bar 90. At the same time, the vertical movement of the lifting block 43 can bring the two ends of the elastic block 41 closer together, thereby increasing the amplitude of the protruding part of the elastic block 41, that is, making the protruding part of the elastic block 41 abut against the threaded steel bar 90. As the lifting block 43 continues to move, the protruding part of the elastic block 41 is deformed by the obstruction of the threaded steel bar 90. When the clamping block 21 is stopped, the elastic block 41 also stops, and the deformation of the elastic block 41 stops. That is, the two elastic blocks 41 are used to clamp and position the threaded steel bar 90, thereby strengthening the positioning effect of the threaded steel bar 90. Furthermore, by using the deformed elastic block 41 to abut against the threaded steel bar 90, the contact area between the two is increased, further strengthening the positioning effect of the threaded steel bar 90.

[0045] During the movement of the lifting block 43, the lifting block 43 will also drive the fixed block 60 to move synchronously. When the clamping block 21 stops, the elastic block 41 deforms and abuts against the threaded steel bar 90. At the same time, the fixed block 60 abuts against the deformed elastic block 41. That is, the arc surface 61 abuts against the deformed elastic block 41. On the one hand, it can support the elastic block 41, and on the other hand, it can ensure the shape of the elastic block 41 after deformation, thereby ensuring the stability of the elastic block 41 after deformation and the threaded steel bar 90. That is, it improves the stability of the clamping and positioning of the threaded steel bar 90 by the two elastic blocks 41.

[0046] The lifting block 43 can move horizontally and vertically, that is, the direction of movement of the lifting block 43 is inclined. During the inclined movement of the lifting block 43, the lifting block 43 drives the limiting block 77 to move synchronously. Since the limiting block 77 is slidably engaged with the limiting groove 761, the limiting block 77 can slide in the limiting groove 761. At the same time, the limiting block 77 will also drive the horizontal block 76 to move downward, and the horizontal block 76 will drive the first wedge block 73 to move downward as well, and the first spring 74 will be compressed. When the clamping block 21 is stopped, the lifting block 43 also stops, and then the first wedge block 73 also stops.

[0047] During the downward movement of the first wedge 73, the first wedge 73 presses the second wedge 78 outward, and the second spring 79 is stretched. The first wedge 73 continues to move downward, causing the second wedge 78 to abut against the side wall of the first wedge 73. The first wedge 73 continues to move downward, and when the clamping block 21 stops, the lifting block 43 also stops, and the first wedge 73 also stops. At this time, the second wedge 78 is laterally opposite to the positioning groove 75. Under the action of the second spring 79, the second wedge 78 extends into the positioning groove 75, thereby positioning the first wedge 73 and the transverse block 76. Then, the lifting block 43 is positioned by the limiting block 77, that is, the upper end of the elastic block 41 is positioned, ensuring the stability of the elastic block 41 abutting against the threaded steel bar 90, thereby improving the stability of the positioning of the threaded steel bar 90.

[0048] During the rotation of the shaft 13, the shaft 13 drives the active bevel gear 84 to rotate. The active bevel gear 84 meshes with the driven bevel gear 81, driving the driven bevel gear 81 to rotate. The driven bevel gear 81 drives the one-way screw 82 to rotate, causing the double wedge block 85 to move upward, that is, the double wedge block 85 moves towards the second inclined surface 80. The double wedge block 85 continues to move. When the shaft 13 stops, the double wedge block 85 also stops. At this time, the double wedge block 85 simultaneously abuts against the two adjacent inclined wedge surfaces of the two adjacent clamping parts. This can simultaneously ensure the stability of the first inclined surface 22 of the two adjacent clamping parts abutting against the threaded steel bar 90, that is, improve the stability of the positioning of the threaded steel bar 90.

[0049] After each threaded rebar 90 is positioned, the welding machine 30 and the third cylinder 32 are started. The output shaft of the third cylinder 32 drives the third moving block 37 to move downward. The third moving block 37 drives the welding machine 30 to act on the threaded rebar 90 at the position where welding is required, thereby achieving the welding process. Furthermore, the position of the welding machine 30 can be adjusted according to the usage requirements. Specifically: the first cylinder 31 is started, and the output shaft of the first cylinder 31 drives the first moving block 35 to move along the length direction of the top seat 34, thereby driving the welding machine 30 to move along the length direction of the top seat 34, thereby changing the position of the welding machine 30; the second cylinder is started, and the output shaft of the second cylinder drives the second moving block 36 to move along the width direction of the top seat 34, thereby driving the welding machine 30 to move along the width direction of the top seat 34, thereby changing the position of the welding machine 30.

[0050] In this embodiment, several rubber blocks (not shown in the figure) are fixedly attached to the surface of the elastic block 41 at equal intervals. The rubber blocks are provided with anti-slip textures on both sides. When the elastic block 41 abuts against the threaded steel bar 90, the rubber blocks extend into the gap of the threaded steel bar 90, thereby limiting the threaded steel bar 90 and preventing it from rotating, thus enhancing the positioning effect of the threaded steel bar 90. Furthermore, the rubber blocks contact the inner walls on both sides of the gap, and the anti-slip textures increase the friction between the two, thereby enhancing the limiting effect of the threaded steel bar 90.

[0051] In this embodiment, a movable block 781 is also included, and the second wedge 78 is fixedly connected to the movable block 781. The movable block 781 can simultaneously drive several second wedges 78 to move at the same time, so that all the second wedges 78 can be moved out of the positioning groove 75 at the same time, and several first wedges 73 can be in a movable state at the same time; the operation is more convenient.

[0052] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An automatic welding system for threaded steel bars used in tunnels, comprising a base, characterized in that: The base has upright blocks on both sides, with guide blocks between the upright blocks. A rotating shaft connects the two upright blocks rotatably, and several clamping parts are equidistantly arranged along the axial direction of the rotating shaft. Each clamping part includes a threaded section symmetrically arranged on the rotating shaft and a clamping block threadedly connected to the threaded section. The clamping blocks are slidably connected to the guide blocks, and the two clamping blocks in each clamping part move in opposite directions. The bottom of the clamping block has a first inclined surface for abutting against the threaded steel bar. The surface of the base has several grooves equidistantly arranged along the length of the base for placing the threaded steel bar, with each groove located at each clamping part. Between the two clamping blocks of the clamping part; it also includes a welding mechanism and a drive mechanism for driving the rotating shaft to rotate; the base is provided with several limiting parts and several adjusting parts at equal intervals along the length direction of the base, the limiting part includes two bottom blocks and elastic blocks located on both sides of the groove, the two bottom blocks are respectively fixed to the bottom of the two clamping blocks of each clamping part, the side wall of the bottom block is provided with a side groove vertically, and a lifting block is slidably connected in the side groove; the elastic block is arc-shaped, the protrusions of the two elastic blocks are arranged laterally opposite, one end of the elastic block is fixed to the base, and the other end of the elastic block is fixed to the lifting block; the two clamping parts of each clamping part are fixed to the base; the base is provided with several limiting parts and several adjusting parts at equal intervals along the length direction of the base, the limiting part includes two bottom blocks and two elastic blocks located on both sides of the groove, the two bottom blocks are respectively fixed to the bottom of the two clamping blocks of each clamping part, the two elastic blocks are respectively fixed to the bottom of the two clamping blocks of each clamping part, the two elastic blocks are respectively fixed to the bottom of the base, and the two elastic blocks are respectively fixed to the bottom of the two clamping blocks of each clamping part; the base is provided with several limiting parts and several adjusting parts at equal intervals along the length direction of the base, the two elastic blocks are respectively fixed to the bottom ... base, and the two elastic blocks are respectively fixed to the bottom of the two clamping blocks of each clamping part; the base is provided with several limiting parts and several adjusting parts at equal intervals along the length direction of the When the clamping block moves closer to or further away, the adjusting part simultaneously drives the two lifting blocks of each limiting part to move vertically. The adjusting part includes top grooves symmetrically opened on the surface of the base, with a recess located between the two top grooves. An inclined groove is provided on the inner wall of the top groove, and the distance between the two inclined grooves gradually decreases from top to bottom. A slider is slidably connected in the inclined groove, and the slider is fixedly connected to the lifting block, allowing the lifting block to move laterally and vertically within the top groove. Several positioning parts are equidistantly arranged along the length of the base. Each positioning part includes a cavity opened inside the base and a guide groove opened on the side wall of the base. The cavity is connected to each adjusting part. The two top slots are connected. The bottom of the chamber is provided with a vertical slot. A first wedge block is slidably connected in the vertical slot. A first spring is provided between the first wedge block and the chamber. A positioning slot is provided on the side wall of the first wedge block. A horizontal block is provided on the top of the first wedge block. Limiting slots are provided on both sides of the horizontal block. A limiting block is provided on the side wall of the lifting block. The limiting block is slidably engaged with the limiting slot. The limiting block can move horizontally and vertically in the top slot and the chamber. A second wedge block is slidably connected in the guide slot for being squeezed by the first wedge block. A second spring is provided between the second wedge block and the base. The second wedge block is slidably engaged with the positioning slot.

2. The automatic welding system for threaded steel bars for tunnels according to claim 1, characterized in that: The surface of the elastic block is provided with several rubber blocks at equal intervals, and the two sides of the rubber blocks are provided with anti-slip texture.

3. The automatic welding system for threaded steel bars for tunnels according to claim 2, characterized in that: The side wall of the lifting block is provided with a fixed block, and the end of the fixed block away from the bottom block is provided with an arc-shaped surface for abutting against the deformed elastic block.

4. The automatic welding system for threaded steel bars for tunnels according to claim 3, characterized in that: It also includes a movable block, and the second wedge block is fixedly connected to the movable block.

5. The automatic welding system for threaded steel bars for tunnels according to claim 4, characterized in that: A second inclined surface is provided on the side of the bottom of the clamping block away from the first inclined surface; several auxiliary parts are provided at equal intervals along the length of the base, and the auxiliary parts are located between two adjacent clamping parts; the auxiliary parts include a driven bevel gear coaxially connected to the rotating shaft, a one-way screw rotatably connected to the base, and a vertical rod fixed to the base, and a driving bevel gear meshing with the driven bevel gear is fixedly connected to the one-way screw; a double wedge block for abutting against the second inclined surface is threadedly connected to the one-way screw, the double wedge block is slidably connected to the vertical rod, and the second inclined surface is located on the movement trajectory of the double wedge block.

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