A multifunctional fully automatic welding workbench for a grid pipe end girth welding production line

Abstract

A multifunctional fully automatic welding workbench for a grid pipe end girth welding production line comprises a base, a frame, a frame position adjustment mechanism, a welding pipe diameter adjustment mechanism, a loading and unloading control mechanism, and a welding pipe speed control mechanism, characterized in that: the welding workbench is provided with a fixed frame and a sliding frame, the fixed frame is fixedly mounted on the base, the sliding frame is slidably mounted on the first guide rail of the base, the first motor of the frame position adjustment mechanism realizes position adjustment of the sliding frame through a first screw rod; the frame is provided with a second guide rail, a third guide rail, and a limit groove, the welding pipe diameter adjustment mechanism and the loading and unloading control mechanism installed on the frame realize diameter adjustment and loading and unloading control through a second screw rod and a third screw rod under the drive of a second motor and a third motor, and the welding pipe speed control mechanism installed on the frame realizes control of the welding pipe speed. The workbench has a simple and reasonable structure and can realize full automatic control of the welding production line.

Description

Technical Field

[0001] The invention relates to a grid pipe end girth welding production line, in particular to a multifunctional full-automatic welding workbench. Background Art

[0002] At present, the automatic welding of the circumferential seam of the truss pipe end requires manual spot welding of the welded pipe and the sealing plate before welding, and then the welded pipe is installed on the welding workbench according to the length of the welded pipe, and then it is removed from the workbench after welding. The welding process requires continuous manual participation, and the degree of automation is relatively low. The truss pipe end circumferential seam welding production line is an effective solution to this problem. The main problems faced in the design of the truss pipe end circumferential seam welding production line are as follows: one is the design of the welding workbench, the second is the design of the automatic conveying device, and the third is the design of the welding quality detection and control system.

[0003] The Chinese patent "A chain-type feeding and conveying device for a fully automatic welding machine for grid pipe end annular seams" (patent number: ZL202020058723.8) can realize the automatic conveying of welded pipes, solving the problem of fully automatic conveying before and after welding in the fully automatic welding production line.

[0004] The Chinese patent "A loading and unloading device for a grid pipe end girth welder" (patent number: ZL201220179814.2) can realize the automatic loading and unloading of the welding table for the welded pipe. The device is both a loading and unloading device and a welding table. However, the device has the following problems: First, the distance between the two frames cannot be adjusted, so the device cannot adapt to welded pipes of different lengths; second, the device cannot detect the installation of the welded pipe, which may cause the welding gun to be welded before the welded pipe is installed in place, or the welding gun does not weld when the welded pipe is installed in place, affecting the welding efficiency; third, because the roller is higher than the top surface of the loading slide rail, the welded pipe will impact the workbench during the loading process, and the loading slide rail may even rotate due to the lack of restrictive measures; fourth, the design of the device is not reasonable. Therefore, the device cannot meet the requirements of a fully automatic welding production line. Summary of the invention

[0005] The purpose of the present invention is to solve the above four problems of the welding workbench, that is, to solve the design problem of a multifunctional fully automatic welding workbench for a grid pipe end girth welding production line.

[0006] In order to solve the design problem of a multifunctional fully automatic welding workbench, the present invention provides a technical solution:

[0007] A multifunctional fully automatic welding workbench for a grid pipe end girth welding production line, comprising a base, a frame, a frame position adjustment mechanism, a welding pipe diameter adjustment mechanism, a loading and unloading control mechanism, and a welding pipe speed control mechanism, wherein the base is provided with a dovetail groove, the dovetail groove is a first guide rail, the frame has two frames, the two frames are a fixed frame and a sliding frame, the fixed frame is fixedly mounted on one end of the first guide rail, and the sliding frame is slidably mounted on the first guide rail; the frame position adjustment mechanism comprises a first screw rod and a nut seat, the first screw rod is rotatably mounted parallel to the first guide rail at the symmetric center of the first guide rail, one end of the first screw rod is transmission-connected to a first motor, the first motor is fixedly mounted on one side of the base, the nut seat has a screw hole with a transmission thread, and the One side of the nut seat is installed on the first screw rod by a transmission thread connection, and the other side of the nut seat is fixedly installed on the sliding frame; the frame is provided with a second guide rail, a third guide rail, a limit groove, and a cylindrical hole, the limit groove includes a first limit groove and a second limit groove, the cylindrical hole includes a first cylindrical hole and a second cylindrical hole, a welding pipe diameter adjustment mechanism, a loading and unloading control mechanism and a welding pipe speed control mechanism are installed on the frame, the welding pipe diameter adjustment mechanism includes a second screw rod and a T-shaped slider, the loading and unloading control mechanism includes a lifting seat, an loading and unloading slide rail, and a third screw rod, the T-shaped slider, the lifting seat and the loading and unloading slide rail are respectively slidably installed on the second guide rail, the third guide rail and the limit groove, and one end of the second screw rod and the third screw rod are respectively transmission-connected to the second motor and the third motor.

[0008] Preferably, the frame includes a frame body, a frame assembly, and a limit screw, the lower bottom surface of the frame body is provided with a dovetail groove, the dovetail groove is slidably adapted to the first guide rail, the upper dovetail groove side of the frame body is parallel to the dovetail groove and two vertical plates are symmetrically arranged, and two rectangular guide rails of equal height and parallel to each other are arranged on the vertical plate between the two vertical plates, the rectangular guide rail is the second guide rail, a guide plate is vertically arranged downward in the middle of the second guide rail, two parallel dovetail grooves are vertically arranged downward on the outer plane of the guide plate, the dovetail groove is the third guide rail, the two third guide rails are symmetrically arranged about the cross section at the midpoint of the second guide rail, and the top of the vertical plate is provided with a cross section about the vertical direction between the two second guide rails A rectangular horizontal through groove symmetrical in a straight symmetrical plane, the cross-sections of the two rectangular horizontal through grooves of the two vertical plates are one large and one small, the large one is the mounting groove, and the small one is the first limiting groove, a horizontal cylindrical hole with an axis line parallel to the side of the first limiting groove is arranged directly below the first limiting groove, and the horizontal cylindrical hole is the first cylindrical hole; the frame assembly is a cube adapted to the mounting groove and having a rectangular horizontal through groove on the upper surface that is arranged in the same direction as the mounting groove and in the center, the rectangular horizontal through groove is the second limiting groove, the second limiting groove is the same height as the first limiting groove and has the same groove width, there is a cylindrical hole directly below the second limiting groove, the cylindrical hole is the second cylindrical hole, and the second cylindrical hole is coaxial with the first cylindrical hole.

[0009] Preferably, two coaxial horizontal through screw holes are opened on the vertical side surfaces on both sides of the first limiting groove, and the through screw holes are the first limiting screw holes. Two coaxial horizontal through screw holes are opened on the vertical side surfaces on both sides of the mounting groove, and the through screw holes are the second limiting screw holes. The second limiting screw hole and the first limiting screw hole are at the same horizontal height, and the first limiting screw hole and the second limiting screw hole are adapted to the limiting screw rod; two coaxial horizontal through cylindrical holes adapted to the limiting screw rod are opened on the vertical side surfaces on both sides of the second limiting groove.

[0010] Preferably, the T-shaped slider is a T-shaped structure with a centrally arranged horizontal rectangular through groove at the top, the rectangular through groove is opened perpendicular to the T-shaped plane, there is a through screw hole directly below the rectangular through groove, the axis of the through screw hole is perpendicular to the T-shaped plane, and two coaxial horizontal cylindrical through holes are opened on the vertical sides of both sides of the rectangular through groove; the lower surfaces of the two shoulders of the T-shaped slider are slidably adapted to the two second guide rails.

[0011] Preferably, the welding pipe diameter adjustment mechanism includes a second screw rod, a T-shaped slider, a gear, a transmission shaft, and a second motor. The external threads on the front and rear outer rings of the second screw rod have opposite rotation directions. The second screw rod is rotatably mounted on the first cylindrical hole and the second cylindrical hole. One end of the second screw rod is transmission-connected to the second motor. The two T-shaped sliders with opposite rotation directions of the internal threads are respectively mounted on the front and rear outer rings of the second screw rod through threaded transmission.

[0012] Preferably, the loading and unloading control mechanism includes loading and unloading slide rails, a lifting seat, a third screw rod, a right-angle triangle block, a rotating shaft, a rotating electromagnet, a travel switch, a spring sheet, and a third motor. One end of the loading and unloading slide rails is slidably adapted to the limit groove, and the other end of the loading and unloading slide rails is installed on the rectangular through groove of the T-shaped slider through a mounting shaft; the loading and unloading slide rails include a loading slide rail and a unloading slide rail, and the loading slide rail and the unloading slide rail are symmetrically arranged about the vertical symmetry plane between the two third guide rails, and the top surfaces of the slide rails are slightly inclined to the same side; the third screw rod is rotatably installed on the frame parallel to the third guide rail, and the two third guide rails are symmetrically arranged about the third screw rod, and one end of the third screw rod is transmission-connected to the third motor; the lifting seat has a slide plate Two dovetail sliders are symmetrically arranged on one side of the skateboard, and the two dovetail sliders are slidably adapted to the two third guide rails. A stepped bracket is provided on the other side of the skateboard, and the stepped bracket includes two horizontal steps. A vertical screw hole is provided on the first horizontal step close to the skateboard, and the internal thread of the screw hole is transmission-connected with the external thread of the third screw rod. The second horizontal step away from the skateboard is higher than the first horizontal step, and a vertical cylindrical hole is provided on the second horizontal step, and a stepped rotating shaft is rotatably installed in the cylindrical hole, a right-angle triangle block is fixedly installed on the top of the stepped rotating shaft, and a rotating electromagnet is connected to the bottom of the stepped rotating shaft, and the rotating electromagnet is fixedly installed on the stepped bracket of the lifting seat.

[0013] Preferably, the right-angled side of the right-angled triangle block is parallel to or perpendicular to the horizontal plane; a spring sheet is fixedly mounted on the right-angled triangle block parallel to its hypotenuse, the upper top surface of the spring sheet is slightly higher than the hypotenuse of the right-angled triangle block, a travel switch is fixedly mounted on the right-angled triangle block, and the contact of the travel switch is slightly lower than the lower bottom surface of the spring sheet; the value by which the upper top surface of the spring sheet is higher than the hypotenuse of the right-angled triangle block is greater than the value by which the lower bottom surface of the spring sheet is higher than the contact of the travel switch.

[0014] Preferably, the cross-section of the loading slide rail and the unloading slide rail is rectangular; two parallel rectangular slide grooves of equal height are symmetrically arranged on the two side surfaces of one end of the loading slide rail and the unloading slide rail, and the two rectangular slide grooves are slidably adapted to the end of the limit screw; the end face of the other end of the loading slide rail and the unloading slide rail is a cylindrical surface, and a horizontal through hole is provided on the cylindrical surface perpendicular to the side surface, and the axis of the horizontal through hole is parallel to and slightly lower than the axis of the end cylindrical surface.

[0015] Preferably, the welding pipe speed control mechanism includes a power wheel, a motor mounting frame, and a fourth motor. The power wheel is fixedly mounted on a transmission shaft in a horizontal through hole of the extended T-shaped slider, the transmission shaft is transmission-connected to the fourth motor, the fourth motor is fixedly mounted on a motor mounting frame, and the motor mounting frame is fixedly mounted on the bottom of the extended T-shaped slider.

[0016] Preferably, the difference between the extended T-shaped slider and the ordinary T-shaped slider is that the bottom end of the extended T-shaped slider has a horizontal rectangular through groove, and the two sides of the horizontal rectangular through groove have two coaxial horizontal through holes perpendicular to the sides.

[0017] Beneficial effects of the present invention: The present invention has complete functions and a simple and reasonable structure. In order to enable the welding workbench to adapt to welding pipes of different lengths and diameters, a frame position adjustment mechanism and a welding pipe diameter adjustment mechanism are provided; in order to realize the automatic upper and lower welding workbench of the welding pipe, a loading and unloading control mechanism is provided; in order to enable the welding workbench to realize up and down, left and right, front and back movements, the first, second and third guide rails are provided, and the first, second and third screw rods are provided; in order to reduce the impact and noise when the welding workbench is moved up and down, and to improve the reliability of the loading and unloading slide rails, the mounting holes for the power wheel and the driven wheel of the loading and unloading slide rails are slightly lower than the axis center line of the cylindrical surface of the end face of the loading and unloading slide rails, and the first, second and third screw rods are provided on the loading and unloading slide rails. A slide groove adapted to the limit screw is provided on the side, which effectively improves the reliability of the action; in order to detect the installation of the welded pipe on the welding workbench, improve the reliability of the welding workbench action, and improve the work efficiency of the workbench, a spring sheet and a travel switch are provided on the right-angle triangle block; in addition, in order to facilitate the assembly of the second screw and its matching parts, and to facilitate the assembly of the motor mounting frame of the fourth motor, the present invention effectively designs one of the vertical plates of the frame, sets a frame assembly, and improves the T-type slider, and sets an extended T-type slider to facilitate the assembly of the motor mounting frame. Combined with the patented technology "A chain-type feeding and conveying device for a fully automatic welding machine for the end ring seam of a grid pipe" (patent number: ZL202020058723.8), it can realize the fully automatic conveying of welded pipes before and after welding, the automatic upper and lower welding workbench of welded pipes, realize the welding production line operation, effectively reduce the labor intensity of welding, and improve the automation degree and work efficiency of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the rack position adjustment mechanism of the present invention;

[0021] Figure 3 It is a schematic diagram of the frame and its assembly parts of the present invention;

[0022] Figure 4 It is a schematic diagram of the assembly structure of the assembly parts on the frame of the present invention;

[0023] Figure 5 It is a schematic diagram of the frame body structure of the fixed frame of the present invention;

[0024] Figure 6 It is a schematic diagram of the sliding frame structure of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the rack assembly of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the lengthened T-shaped slider of the present invention;

[0027] Fig. 9 It is a schematic diagram of the structure of the lengthened T-shaped slider of the present invention;

[0028] Fig.10 It is a schematic diagram of a common T-shaped slider of the present invention;

[0029] Fig.11 It is a schematic diagram of the structure of the feeding slide rail of the present invention;

[0030] Fig.12 It is a schematic diagram of the structure of the unloading slide rail of the present invention;

[0031] Fig.13 It is a schematic diagram of the lifting seat structure of the present invention;

[0032] Fig.14 It is a schematic diagram of the rotating shaft structure of the present invention;

[0033] In the figure: 1, base; 11, first guide rail; 2, rack; 21, rack body; 210, dovetail groove; 211, vertical plate; 212, mounting groove; 213, second guide rail; 214, third guide rail; 215, first limiting groove; 216, first cylindrical hole; 217, limiting screw hole; 2171, first limiting screw hole; 2172, second limiting screw hole; 218, rack assembly mounting screw hole; 219, nut seat mounting screw hole; 22, rack assembly Components; 221, second limit groove; 222, second cylindrical hole; 223, limit screw cylindrical hole; 224, mounting screw hole; 23, limit screw; 24, rack assembly fixing screw; 3, rack position adjustment mechanism; 31, first screw rod; 32, gear; 33, nut seat; 34, motor bracket; 35, bearing seat; 30, first motor; 4, welding pipe diameter adjustment mechanism; 41, second screw rod; 42, extended T-shaped slider; 421, rectangular through slot; 422, through screw hole; 423, cylindrical through hole; 424, rectangular through slot; 425, cylindrical through hole; 426, shoulder lower surface; 43, ordinary T-shaped slider; 44, gear; 45, transmission shaft; 40, second motor; 5, loading and unloading control mechanism; 51, loading slide rail; 511, rectangular slot; 512, through hole; 513, slide rail top surface; 52, unloading slide rail; 521, rectangular slot; 522, through hole; 523, slide rail top surface; 5 3. Lifting seat; 531. Slide plate; 532. Dovetail slider; 533. Bracket; 534. Screw hole; 535. Cylindrical hole; 54. Third screw rod; 55. Right-angle triangle block; 56. Rotating shaft; 57. Rotating electromagnet; 58. Travel switch: 59. Spring sheet; 50. Third motor; 6. Welding pipe speed control mechanism; 61. Transmission wheel; 62. Transmission belt; 63. Motor mounting bracket; 64. Power wheel; 65. Driven wheel; 60. Fourth motor. DETAILED DESCRIPTION

[0034] like Figure 1-14As shown, this specific embodiment adopts the following technical scheme: a multifunctional fully automatic welding workbench for a grid pipe end girth welding production line, comprising a base 1, a frame 2, a frame position adjustment mechanism 3, a welding pipe diameter adjustment mechanism 4, a loading and unloading control mechanism 5, and a welding pipe speed control mechanism 6, characterized in that: the base 1 is provided with a dovetail groove, the dovetail groove is a first guide rail 11, the frame 2 has two, the two frames 2 are a fixed frame and a sliding frame respectively, the fixed frame is fixedly mounted on one end of the first guide rail 11, and the sliding frame is slidably mounted on the first guide rail 11; the frame position adjustment mechanism 3 comprises a first screw rod 31 and a nut seat 33, the first screw rod 31 is rotatably mounted parallel to the first guide rail 11 at the symmetric center of the first guide rail 11, one end of the first screw rod 31 is transmission-connected to a first motor 30, the first motor 30 is fixedly mounted on one side of the base 1, the nut seat 33 has a screw hole with a transmission thread, and one end of the nut seat 33 The first side of the nut seat 33 is installed on the first screw rod 31 through a transmission thread connection, and the other side of the nut seat 33 is fixedly installed on the sliding frame; the frame 2 is provided with a second guide rail 213, a third guide rail 214, a limit groove, and a cylindrical hole, the limit groove includes a first limit groove 215 and a second limit groove 221, and the cylindrical hole includes a first cylindrical hole 216 and a second cylindrical hole 222. The frame 2 is installed with a welding pipe diameter adjustment mechanism 4, a loading and unloading control mechanism 5 and a welding pipe speed control mechanism 6 The welding pipe diameter adjustment mechanism 4 includes a second screw rod 41 and a T-shaped slider 42, and the loading and unloading control mechanism 5 includes a lifting seat 53, loading and unloading slide rails 51 and 52, and a third screw rod 54. The T-shaped slider 42, the lifting seat 53 and the loading and unloading slide rails 51 and 52 are respectively slidably installed on the second guide rail 213, the third guide rail 214 and the limiting grooves 215 and 221, and one end of the second screw rod 41 and the third screw rod 54 are respectively connected to the second motor 40 and the third motor 50.

[0035] The frame 2 includes a frame body 21, a frame assembly 22, and a limit screw 23. The lower bottom surface of the frame body 21 is provided with a dovetail groove 210, and the dovetail groove 210 is slidably adapted to the first guide rail 11. Two vertical plates 211 are symmetrically arranged on the upper dovetail groove side of the frame body 21 in parallel with the dovetail groove 210. Two rectangular guide rails of equal height and parallel to each other are arranged on the vertical plate between the two vertical plates 211. The rectangular guide rail is a second guide rail 213. A guide plate is arranged vertically downward in the middle of the second guide rail 213. Two parallel dovetail grooves are arranged vertically downward on the outer plane of the guide plate. The dovetail groove is a third guide rail 214. The two third guide rails 214 The cross-section at the midpoint of the second guide rail 213 is symmetrically arranged, and a rectangular horizontal through groove with a cross-section symmetrical about the vertical symmetry plane between the two second guide rails 213 is opened at the top of the vertical plate. The cross-sections of the two rectangular horizontal through grooves of the two vertical plates are large and small. The large one is the installation groove 212, and the small one is the first limiting groove 215. A horizontal cylindrical hole with an axis parallel to the side of the first limiting groove is arranged directly below the first limiting groove 215. The horizontal cylindrical hole is the first cylindrical hole 216; the frame assembly 22 is a cube that is adapted to the installation groove 212 and has a rectangular horizontal through groove on the upper surface that is arranged in the same direction as the installation groove and in the center. The rectangular horizontal through groove is the second limiting groove The second limiting groove 221 is of the same height and width as the first limiting groove 215. There is a cylindrical hole directly below the second limiting groove 221, and the cylindrical hole is the second cylindrical hole 222. The second cylindrical hole 222 is coaxial with the first cylindrical hole 216. The vertical side surfaces on both sides of the first limiting groove 215 are provided with two coaxial horizontal through screw holes, and the through screw holes are the first limiting screw holes 2171. The vertical side surfaces on both sides of the mounting groove 212 are provided with two coaxial horizontal through screw holes, and the through screw holes are the second limiting screw holes 2172. The second limiting screw hole 2172 and the first limiting screw hole 2171 are at the same horizontal height, and the first limiting The screw hole 2171 and the second limiting screw hole 2172 are adapted to the limiting screw 23; two coaxial horizontal through cylindrical holes adapted to the limiting screw 23 are provided on the vertical side surfaces on both sides of the second limiting groove 221; the T-shaped slider 42 is a T-shaped structure with a horizontal rectangular through groove 421 arranged in the center at the top, the rectangular through groove 421 is provided perpendicular to the T-shaped plane, a through screw hole 422 is provided directly below the rectangular through groove 421, the axis of the through screw hole 422 is perpendicular to the T-shaped plane, and two coaxial horizontal cylindrical through holes 423 are provided on the vertical side surfaces on both sides of the rectangular through groove 421; the two shoulder lower surfaces 426 of the T-shaped slider 42 are slidably adapted to the two second guide rails 213;The welding pipe diameter adjustment mechanism 4 includes a second screw rod 41, a T-shaped slider 42, a gear 44, a transmission shaft 45, and a second motor 40. The outer threads of the front and rear outer rings of the second screw rod 41 are arranged in opposite directions. The second screw rod 41 is rotatably mounted on the first cylindrical hole 216 and the second cylindrical hole 222. One end of the second screw rod 41 is connected to the second motor 40 in a transmission manner. The two T-shaped sliders 42 with opposite directions of inner threads are respectively mounted on the front and rear outer rings of the second screw rod 41 by thread transmission. The loading and unloading control mechanism 5 includes a loading and unloading slide rail, a lifting seat 53, a third screw rod 54, a right-angle triangle block 55, a rotating shaft 56, a rotating electromagnet 57, a travel switch 58, and a spring sheet 59. , a third motor 50, one end of the loading and unloading slide rails 51 and 52 are slidably adapted to the limit grooves 216 and 221, and the other ends of the loading and unloading slide rails 51 and 52 are installed on the rectangular through groove of the T-shaped slider 42 through the mounting shaft; the loading and unloading slide rails include a loading slide rail 51 and a unloading slide rail 52, and the loading slide rail 51 and the unloading slide rail 52 are symmetrically arranged about the vertical symmetry plane between the two third guide rails 214, and the top surfaces 513 and 523 of the slide rails are slightly inclined to the same side; the third screw rod 54 is rotatably installed on the frame parallel to the third guide rail 214, and the two third guide rails 214 are symmetrically arranged about the third screw rod 54, and one end of the third screw rod 54 is transmission connected to the third motor 50; the lifting The seat 53 has a slide plate 531, and two dovetail sliders 532 are symmetrically arranged on one side of the slide plate 531. The two dovetail sliders 532 are slidably adapted to the two third guide rails 214. The other side of the slide plate 531 has a stepped bracket 533, and the stepped bracket 533 includes two horizontal steps. The first horizontal step close to the slide plate 531 has a vertical screw hole 534, and the internal thread of the screw hole 534 is transmission-connected with the external thread of the third screw rod 54. The second horizontal step away from the slide plate 531 is higher than the first horizontal step, and the second horizontal step has a vertical cylindrical hole 535. A stepped shaft 56 is rotatably installed in the cylindrical hole 535. The stepped shaft 56 is rotationally installed in the cylindrical hole 535. A right-angled triangle block 55 is fixedly installed on the top of the shaft 56, and a rotating electromagnet 57 is connected to the bottom of the stepped rotating shaft 56, and the rotating electromagnet 57 is fixedly installed on the stepped bracket 533 of the lifting seat 53; the right-angled side of the right-angled triangle block 55 is parallel or perpendicular to the horizontal plane; a spring sheet 59 is fixedly installed on the right-angled triangle block 55 in parallel with its hypotenuse, and the upper top surface of the spring sheet 59 is slightly higher than the hypotenuse of the right-angled triangle block, and a travel switch 58 is fixedly installed on the right-angled triangle block 55, and the contact of the travel switch 58 is slightly lower than the lower bottom surface of the spring sheet 59; the value by which the upper top surface of the spring sheet 59 is higher than the hypotenuse of the right-angled triangle block 55 is greater than the value by which the lower bottom surface of the spring sheet 59 is higher than the contact of the travel switch 58;The cross-section of the loading slide 51 and the unloading slide 52 is rectangular, and two parallel rectangular slide grooves 511 and 521 of equal height are symmetrically arranged on the two side surfaces of one end of the loading slide 51 and the unloading slide 52, and the rectangular slide grooves 511 and 521 are slidably adapted to the end of the limit screw 23; the end surface of the other end of the loading slide 51 and the unloading slide 52 is a cylindrical surface, and there is a horizontal through hole 512 and 522 on the cylindrical surface vertical to the side surface, and the axis of the horizontal through hole 512 and 522 is parallel to and slightly lower than the axis of the end cylindrical surface; the welding pipe speed control mechanism 6 includes a power wheel 6 4. Motor mounting frame 63, fourth motor 60, the power wheel 64 is fixedly mounted on the transmission shaft in the horizontal through hole 423 of the elongated T-shaped slider, the transmission shaft is in transmission connection with the fourth motor 60, the fourth motor 60 is fixedly mounted on the motor mounting frame 63, and the motor mounting frame 63 is fixedly mounted on the bottom of the elongated T-shaped slider 42; the difference between the elongated T-shaped slider 42 and the ordinary T-shaped slider 43 is that the bottom end of the elongated T-shaped slider 42 has a horizontal rectangular through groove 424, and the two sides of the horizontal rectangular through groove 424 have two coaxial horizontal through holes 425 perpendicular to the sides. ;

[0036] Specifically: A multifunctional fully automatic welding workbench for a grid pipe end girth welding production line has the following functions when in use: according to the length of the welded pipe, the first motor 30 drives the first screw rod 31 to rotate, and the first screw rod 31 drives the sliding frame to slide on the first guide rail 11 through the nut seat 33, so as to adjust the distance between the sliding frame and the fixed frame, and achieve the matching of the distance between the two frames and the length of the welded pipe; when the diameter of the welded pipe changes, the second motor 40 drives the second screw rod 41 to rotate, and the second screw rod 41 drives the T-shaped slider 4 2 or 43 slides on the second guide rail 213, and the T-shaped slider 42 or 43 drives the loading and unloading slide rails 51 and 52 to slide in the limiting groove, thereby changing the distance between the power wheel 64 and the driven wheel 65 on the loading and unloading slide rails 51 and 52, so as to achieve the matching of the welding workbench with the diameter of the welding pipe; before loading, the third motor 50 drives the lifting seat 53 to slide to the upper top on the third guide rail 214 through the third screw rod 54, and at the same time, under the drive of the rotating electromagnet 57, the hypotenuse of the right-angle triangle block 55 faces the loading side; when loading, the welding pipe is moved from the loading slide rail 51 side loading, because the top surface of the loading slide rail is slightly inclined toward the center of the welding workbench, the welded pipe rolls on the slide rail toward the center of the welding workbench, and because the installation axis of the power wheel 64 and the driven wheel 65 on the loading and unloading slide rails 51 and 52 is slightly lower than the axis of the cylindrical surface at the end surface of the loading slide rail, the highest point of the power wheel 64 and the driven wheel 65 is tangent to or slightly lower than the top surface of the slide rail, and the impact of the welded pipe on the workbench is relatively small during loading, and the noise is also relatively small; when the spring sheets 59 on the two right-angle triangle blocks 55 are pressed down by the welded pipe, the stroke is opened The switch 58 is activated and generates a control signal. The third motor 50 drives the lifting seat 53 to slide to the bottom end on the third guide rail 214 through the third screw rod 54. The welding pipe contacts the power wheel and the driven wheel. The fourth motor 60 drives the power wheel 64 to rotate. The workbench enters the welding state and the welding gun can be welded. When unloading, under the drive of the rotating electromagnet 57, the hypotenuse of the right-angle triangle block 55 faces the unloading side. The third motor 50 drives the lifting seat 53 to slide to the top end on the third guide rail 214 through the third screw rod 54 to realize unloading. Combined with the patented technology "a loading and unloading device for a grid pipe end girth welder" (patent number: ZL201220179814.2), the task of fully automatic transportation of the pipe to be welded and fully automatic loading on the welding workbench can be realized, which can effectively reduce the labor intensity of welding workers and improve welding work efficiency.

[0037] The above shows and describes the basic principles and main features of the present invention as well as the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A multifunctional fully automatic welding workbench for a grid pipe end girth welding production line, comprising a base, a frame, a frame position adjustment mechanism, a welding pipe diameter adjustment mechanism, a loading and unloading control mechanism, and a welding pipe speed control mechanism, characterized in that: The base is provided with a dovetail groove, and the dovetail groove is a first guide rail. The frame has two frames, and the two frames are respectively a fixed frame and a sliding frame. The fixed frame is fixedly mounted on one end of the first guide rail, and the sliding frame is slidably mounted on the first guide rail; the frame position adjustment mechanism includes a first screw rod and a nut seat, the first screw rod is rotatably mounted parallel to the first guide rail at the symmetry center of the first guide rail, one end of the first screw rod is transmission-connected to the first motor, and the first motor is fixedly mounted on one side of the base, and the nut seat has a screw hole with a transmission thread, one side of the nut seat is mounted on the first screw rod by a transmission thread connection, and the other side of the nut seat is fixedly mounted on the sliding frame On the frame; the frame is provided with a second guide rail, a third guide rail, a limit groove, and a cylindrical hole, the limit groove includes a first limit groove and a second limit groove, the cylindrical hole includes a first cylindrical hole and a second cylindrical hole, the frame is installed with a welding pipe diameter adjustment mechanism, a loading and unloading control mechanism and a welding pipe speed control mechanism, the welding pipe diameter adjustment mechanism includes a second screw rod and a T-shaped slider, the loading and unloading control mechanism includes a lifting seat, a loading and unloading slide rail, and a third screw rod, the T-shaped slider is slidably mounted on the second guide rail, the lifting seat is slidably mounted on the third guide rail, the loading and unloading slide rail is slidably mounted on the limit groove, the second screw rod is transmission-connected to the second motor, and the third screw rod is transmission-connected to the third motor; The frame includes a frame body, a frame assembly, and a limit screw. A dovetail groove is provided on the bottom surface of the lower part of the frame body, and the dovetail groove is slidably adapted to the first guide rail. Two vertical plates are symmetrically arranged on the dovetail groove side of the upper dovetail groove of the frame body, and two rectangular guide rails of equal height and parallel to each other are arranged on the vertical plate between the two vertical plates. The rectangular guide rail is the second guide rail. A guide plate is vertically arranged downward in the middle of one of the second guide rails, and two parallel dovetail grooves are vertically arranged downward on the outer plane of the guide plate. The dovetail groove is the third guide rail. The two third guide rails are symmetrically arranged with respect to the cross section at the midpoint of the second guide rail, and a rectangular horizontal plate is symmetrical with respect to the vertical symmetry plane between the two second guide rails on the top of the vertical plate. The cross-sections of the two rectangular horizontal through-slots of the two vertical plates are one large and one small, the rectangular horizontal through-slot with the larger cross-section is the mounting slot, and the rectangular horizontal through-slot with the smaller cross-section is the first limiting slot, a horizontal cylindrical hole with an axis parallel to the side of the first limiting slot is arranged directly below the first limiting slot, and the horizontal cylindrical hole is the first cylindrical hole; the frame assembly is a cube adapted to the mounting slot and having a rectangular horizontal through-slot on the upper surface arranged in the same direction as the mounting slot and centered thereon, the rectangular horizontal through-slot is the second limiting slot, the second limiting slot is of the same height and has the same slot width as the first limiting slot, a cylindrical hole is arranged directly below the second limiting slot, the cylindrical hole is the second cylindrical hole, and the second cylindrical hole is coaxial with the first cylindrical hole; The loading and unloading control mechanism includes loading and unloading slide rails, a lifting seat, a third screw rod, a right-angle triangle block, a rotating shaft, a rotating electromagnet, a travel switch, a spring sheet, and a third motor. One end of the loading and unloading slide rails is slidably adapted to the limit groove, and the other end of the loading and unloading slide rails is installed on the rectangular through groove of the T-shaped slider through a mounting shaft; the loading and unloading slide rails include a loading slide rail and a unloading slide rail, and the loading slide rail and the unloading slide rail are symmetrically arranged about the vertical symmetry plane between the two third guide rails, and the top surfaces of the slide rails are slightly inclined to the same side; the third screw rod is rotatably installed on the frame parallel to the third guide rail, and the two third guide rails are symmetrically arranged about the third screw rod, and one end of the third screw rod is transmission-connected to the third motor; the lifting seat has a slide plate, Two dovetail sliders are symmetrically arranged on one side of the slide, and the two dovetail sliders are slidably adapted to the two third guide rails. A stepped bracket is arranged on the other side of the slide, and the stepped bracket includes two horizontal steps. A vertical screw hole is arranged on the first horizontal step close to the slide, and the internal thread of the screw hole is transmission-connected with the external thread of the third screw rod. The second horizontal step away from the slide is higher than the first horizontal step, and a vertical cylindrical hole is arranged on the second horizontal step, and a stepped shaft is rotatably installed in the cylindrical hole, a right-angle triangle block is fixedly installed on the top of the stepped shaft, and a rotating electromagnet is connected to the bottom of the stepped shaft, and the rotating electromagnet is fixedly installed on the stepped bracket of the lifting seat; The right-angled side of the right-angled triangle block is parallel to or perpendicular to the horizontal plane; a spring sheet is fixedly installed on the right-angled triangle block parallel to its hypotenuse, the upper top surface of the spring sheet is slightly higher than the hypotenuse of the right-angled triangle block, a travel switch is fixedly installed on the right-angled triangle block, and the contact of the travel switch is slightly lower than the lower bottom surface of the spring sheet; the value by which the upper top surface of the spring sheet is higher than the hypotenuse of the right-angled triangle block is greater than the value by which the lower bottom surface of the spring sheet is higher than the contact of the travel switch.

2. The multifunctional fully automatic welding workbench of the grid pipe end girth welding production line according to claim 1 is characterized by: Two coaxial horizontal through screw holes are opened on the vertical side surfaces on both sides of the first limiting groove, and the through screw holes are the first limiting screw holes. Two coaxial horizontal through screw holes are opened on the vertical side surfaces on both sides of the mounting groove, and the through screw holes are the second limiting screw holes. The second limiting screw hole and the first limiting screw hole are at the same horizontal height, and the first limiting screw hole and the second limiting screw hole are adapted to the limiting screw rod; two coaxial horizontal through cylindrical holes adapted to the limiting screw rod are opened on the vertical side surfaces on both sides of the second limiting groove.

3. The multifunctional fully automatic welding workbench of the grid pipe end girth welding production line according to claim 1 is characterized by: The T-shaped slider is a T-shaped structure with a centrally arranged horizontal rectangular through groove at the top, the rectangular through groove is opened perpendicular to the T-shaped plane, there is a through screw hole directly below the rectangular through groove, the axis of the through screw hole is perpendicular to the T-shaped plane, and two coaxial horizontal cylindrical through holes are opened on the vertical sides of both sides of the rectangular through groove; the lower surfaces of the two shoulders of the T-shaped slider are slidably adapted to the two second guide rails.

4. The multifunctional fully automatic welding workbench of the grid pipe end girth welding production line according to claim 1 is characterized in that: The welding pipe diameter adjustment mechanism includes a second screw rod, a T-shaped slider, a gear, a transmission shaft, and a second motor. The external threads on the front and rear outer rings of the second screw rod have opposite rotation directions. The second screw rod is rotatably installed on the first cylindrical hole and the second cylindrical hole. One end of the second screw rod is transmission-connected to the second motor. The two T-shaped sliders with opposite internal threads are respectively installed on the front and rear outer rings of the second screw rod through threaded transmission.

5. The multifunctional fully automatic welding workbench of the grid pipe end girth welding production line according to claim 1 is characterized by: The cross-section of the loading slide rail and the unloading slide rail is rectangular; two parallel rectangular slide grooves of equal height are symmetrically arranged on the two side surfaces of one end of the loading slide rail and the unloading slide rail, and the rectangular slide grooves are slidably adapted to the end of the limit screw; the end face of the other end of the loading slide rail and the unloading slide rail is a cylindrical surface, and a horizontal through hole is provided on the cylindrical surface perpendicular to the side surface, and the axis of the horizontal through hole is parallel to and slightly lower than the axis of the end cylindrical surface.

6. The multifunctional fully automatic welding workbench of the grid pipe end girth welding production line according to claim 1 is characterized by: The welding pipe speed control mechanism includes a power wheel, a motor mounting frame, and a fourth motor. The power wheel is fixedly mounted on a transmission shaft in a horizontal through hole of the extended T-shaped slider. The transmission shaft is transmission-connected to the fourth motor. The fourth motor is fixedly mounted on a motor mounting frame. The motor mounting frame is fixedly mounted on the bottom of the extended T-shaped slider.

7. The multifunctional fully automatic welding workbench of the grid pipe end girth welding production line according to claim 6 is characterized by: The difference between the extended T-shaped slider and the ordinary T-shaped slider is that the bottom end of the extended T-shaped slider has a horizontal rectangular through groove, and the two sides of the horizontal rectangular through groove have two coaxial horizontal through holes perpendicular to the sides.

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