Automatic welding machine for steel structure tie bar

Abstract

The utility model discloses an automatic welding machine for a steel structure tie bar. The automatic welding machine comprises a machine body, a left machine head body and a right moving machine head body. Machine body guide rails are arranged on the two sides of the machine body, the left machine head body is fixed to the left end of the machine body, the right moving machine head body is arranged on the machine body guide rails in a sliding mode, a machine body rack is arranged on one side of the right end of the machine body, and the machine body rack and a movable end gear rack of the right moving machine head body are in transmission. A middle tug frame is fixed to the center of the machine body through a wheel frame locking hook, and middle tugs are symmetrically arranged on the middle tug frame. Through the arrangement of the left machine head body and the right moving machine head body, the driving wheel gear motor and the driving wheel body are matched, and efficient and automatic welding of a round pipe workpiece and a T-shaped workpiece is achieved; the right moving machine head body can stably move on the machine body guide rail through cooperation of the machine body rack and the longitudinal driving gear motor, the welding flexibility is improved, and the application range is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of welding machines, specifically to a kind of steel structure tie rod automatic welding machine. BACKGROUND

[0002] Traditionally, the welding of long-axis-distance workpieces is mostly done by manual welding. This method is not only inefficient, but also difficult to guarantee the welding quality, because manual welding is affected by many factors such as worker's skill, fatigue level and environmental conditions.

[0003] Some manufacturers use fixed welding equipment, i.e. fixing the workpiece on the welding equipment, and then adjusting the position of welding torch by manual or mechanical method for welding. Although this method improves the welding efficiency to some extent, it still has the problem of insufficient flexibility, especially when the size or shape of the workpiece changes, a lot of time is needed for re-adjustment. SUMMARY

[0004] The utility model provides a kind of steel structure tie rod automatic welding machine to solve the problems existing in the background art.

[0005] The steel structure tie rod automatic welding machine of the utility model is realized by the following technical solutions, comprising a machine body, a left machine head body and a right moving machine head body;

[0006] Both sides of the machine body are provided with machine body guide rails, and the left machine head body is fixed to the left end of the machine body, and the right moving machine head body is slidingly arranged on the machine body guide rails, wherein a machine body rack is arranged on the right side of the right end of the machine body, and the machine body rack is in transmission with the movable end gear rack of the right moving machine head body; an intermediate tow wheel bracket is fixed to the machine body by a wheel bracket locking hook, and an intermediate tow wheel is symmetrically arranged on the intermediate wheel bracket;

[0007] A drive wheel reduction motor is installed below the end of the left machine head body and the right moving machine head body, and a drive wheel body is installed on the end of the left machine head body and the right moving machine head body through a drive wheel support, and the drive wheel body is connected with the drive wheel reduction motor through a drive chain; the intermediate tow wheel and the drive wheel body are on the same axis, and a circular pipe workpiece is placed on the intermediate tow wheel and the drive wheel body;

[0008] The left machine head body and the right moving machine head body are respectively provided with a left moving clamping mechanism and a right moving clamping mechanism, and a T-shaped workpiece is fixed to the clamping end of the left moving clamping mechanism and the right moving clamping mechanism, and the T-shaped workpiece corresponds to the position of the two ends of the circular pipe workpiece;

[0009] The left head body is provided with a left wire feeder on one side, and the right moving head body is provided with a right moving wire feeder on one side; the front end of the drive wheel support of the left head body and the right moving head body is provided with a material feeding mechanism, and the rear end of the drive wheel support of the left head body and the right moving head body is provided with a material discharging mechanism; a welding gun swing device is installed below the left head body and the right moving head body; a drag chain groove is arranged at the bottom of the body body, and the drag chain of the right moving head body is arranged in the drag chain groove.

[0010] An operation control screen is installed on the left head body.

[0011] As a preferred technical solution, the left head body comprises a left head body fixing plate and a left head box arranged on the left head body fixing plate; the left moving clamping mechanism is arranged in the left head box;

[0012] A left lifting motor is installed above the left head box, a left lifting screw rod seat is installed on the output shaft of the left moving motor, and a left lifting screw rod main body is fixed on the left lifting screw rod seat; a right lifting nut is connected to the moving clamping mechanism through a right up-down moving guide rod, and the right lifting screw rod main body is connected to the right lifting nut, and the right moving clamping mechanism is driven to move by driving the right moving motor to rotate;

[0013] The other side of the left head box is provided with a left pressure roller cylinder, and a left pressure roller seat is installed at the output shaft end of the left pressure roller cylinder; a left pressure roller main body is arranged below the left pressure roller seat, and the left pressure roller main body corresponds to the position of the round pipe workpiece;

[0014] A left lifting guide rod is arranged on the left pressure roller seat, a linear bearing corresponding to the lifting guide rod is arranged on the left head box, the left lifting guide rod is arranged in the linear bearing, and the effect of auxiliary guide is achieved;

[0015] A left welding gun manual adjustment cross slide is installed at one end of the left pressure roller seat, and the welding gun swing device is slidably arranged on the left welding gun manual adjustment cross slide;

[0016] As a preferred technical solution, the right moving head body comprises a right moving head slide plate and a right moving head box;

[0017] The right moving head box is arranged on the right moving head slide plate, and guide rail side clamping rollers are arranged around the right moving head slide plate, and the guide rail side clamping rollers are in contact with the body guide rail;

[0018] A longitudinal driving speed reduction motor is arranged on one side of the right moving head slide plate, and a longitudinal moving gear is installed on the output shaft of the longitudinal driving speed reduction motor; the longitudinal moving gear is engaged with the body rack on the side of the body body, thereby driving the right moving head slide plate to move;

[0019] The upper part of the right moving head box body is provided with a right lifting motor, and the output shaft of the right moving motor is provided with a right lifting screw rod seat, and the right lifting screw rod seat is fixed with a right lifting screw rod main body. The right lifting nut is connected with the right lifting screw rod main body through the right upper and lower moving guide rod, and the right moving motor is driven to rotate to drive the right moving clamping mechanism to move.

[0020] The upper part of the right moving head box body is provided with a right lifting motor, and the output shaft of the right moving motor is provided with a right lifting screw rod seat, and the right lifting screw rod seat is fixed with a right lifting screw rod main body. The right lifting nut is connected with the right lifting screw rod main body through the right upper and lower moving guide rod, and the right moving motor is driven to rotate to drive the right moving clamping mechanism to move.

[0021] The upper part of the right moving head box body is provided with a right lifting motor, and the output shaft of the right moving motor is provided with a right lifting screw rod seat, and the right lifting screw rod seat is fixed with a right lifting screw rod main body. The right lifting nut is connected with the right lifting screw rod main body through the right upper and lower moving guide rod, and the right moving motor is driven to rotate to drive the right moving clamping mechanism to move.

[0022] The right lifting nut is connected with the right lifting screw rod main body through the right upper and lower moving guide rod, and the right moving motor is driven to rotate to drive the right moving clamping mechanism to move.

[0023] The right lifting nut is connected with the right lifting screw rod main body through the right upper and lower moving guide rod, and the right moving motor is driven to rotate to drive the right moving clamping mechanism to move.

[0024] As a preferred technical scheme, the feeding mechanism comprises a feeding machine seat, a first feeding cylinder, a second feeding cylinder, an up-down moving sliding block, a feeding guide rod connecting plate and a feeding supporting plate.

[0025] The output shaft of the first feeding cylinder is installed below the feeding machine seat, and the second feeding cylinder is installed above the feeding machine seat. The output shaft of the second feeding cylinder is provided with a feeding guide rod connecting plate, and the upper part of the feeding guide rod connecting plate is provided with a longitudinal roller rear support and a longitudinal roller front support on both sides, respectively. The longitudinal roller main body is rotatably arranged between the longitudinal roller rear support and the longitudinal roller front support through a longitudinal roller shaft. The feeding supporting plate is installed on one side of the longitudinal roller front support. The feeding machine seat is provided with an up-down moving sliding block on both sides, and the feeding guide rod connecting plate is provided with a guide rail main body below, which is guided and arranged on the up-down moving sliding blocks on both sides of the feeding machine seat.

[0026] As a preferred technical scheme, the welding gun swing device is installed on the left welding gun hand adjusting cross slide through the swing device mounting seat plate, and the welding gun swing device comprises a swing device mounting seat plate, a swing motor up-down adjusting handle, an adjusting screw rod, a dovetail sliding block, a motor fixing seat, a swing motor, an eccentric wheel, a fixed guide rod, a welding gun swing sliding block, a gun withdrawing cylinder, a rolling bearing, a swing sliding block rebound spring and a swing device housing.

[0027] The dovetail slider is arranged at the rear of the inside of the gun swing device shell, and the front end of the dovetail slider is provided with a motor fixing seat, and the gun swing motor is arranged on the motor fixing seat;

[0028] The bottom of the gun swing device shell body is provided with an adjusting screw through a bearing, and the adjusting end of the adjusting screw is connected with the adjusting hole of the dovetail slider, and the other end of the adjusting screw is connected with the up-down adjusting handle of the gun swing motor, and the up-down movement of the dovetail slider is driven by rotating the up-down adjusting handle of the gun swing motor;

[0029] The inside of the gun swing device shell body is provided with a fixed guide rod, and the welding gun swing slider guide is arranged on the fixed guide rod, and the swing slider rebound spring is arranged between the fixed guide rod and the welding gun swing slider; the front end of the gun swing device shell body is provided with a gun withdrawing cylinder, and the output shaft of the gun withdrawing cylinder is connected with the welding gun swing slider through the gun swing device shell body;

[0030] The output shaft of the gun swing motor is provided with an eccentric wheel, the welding gun swing slider is provided with a rolling bearing, and the eccentric wheel is in contact with the rolling bearing, the welding gun swing slider is swung by rotating the eccentric wheel and under the action of the swing slider rebound spring.

[0031] As a preferred technical solution, the unloading mechanism comprises an unloading fixed plate, an unloading cylinder, an unloading guide rod connecting plate, and an unloading angle plate.

[0032] The unloading cylinder is arranged at the bottom of the unloading fixed plate, and the output shaft of the unloading cylinder is connected with the unloading guide rod connecting plate through the unloading fixed plate; the unloading angle plate is arranged above the unloading guide rod connecting plate.

[0033] The unloading fixed plate is provided with a linear bearing on both sides, and the unloading guide rod main body is arranged below the unloading guide rod connecting plate, and the unloading guide rod main body is arranged in the linear bearing.

[0034] As a preferred technical solution, the left and right moving clamping mechanisms each comprise an up-down moving slide plate, an advance-retreat cylinder, an up-down moving support, a left-right moving slider, a left-right moving slide plate, a gas path rotary switch, a clamping jaw cylinder, a cylinder seat, a rotary hollow shaft, an extension linear bearing, a clamping jaw pull rod, a rotary bearing, a pull jaw seat, an upper pull jaw, a clamping guide rod, an upper clamping linear bearing, an upper clamping plate, a lower clamping plate, a lower clamping linear bearing, a lower pull jaw, a zero position positioning pin, and a zero position control cylinder.

[0035] The up-and-down moving bracket is installed on the up-and-down moving slide plate, and the right lifting nut or the right lifting screw is fixed on the up-and-down moving bracket; the side surface of the up-and-down moving slide plate is provided with an up-and-down moving bearing, and the up-and-down moving bearing is guided by the right up-and-down moving guide rod or the left up-and-down moving guide rod; the advance-and-retreat air cylinder is installed on the up-and-down moving slide plate through the air cylinder fixing seat; the up-and-down moving slide plate is provided with a linear guide rail, and the left-and-right moving slide plate is slidably arranged on the linear guide rail through the left-and-right moving slide block; the output end of the advance-and-retreat air cylinder is connected with the left-and-right moving slide plate;

[0036] The up-and-down moving slide plate is provided with a fixing seat, and the rotating hollow shaft is installed inside the fixing seat through a rotating bearing; the inside of the rotating hollow shaft is provided with an extension linear bearing, and the extension linear bearing is guided by the clamping jaw pull rod;

[0037] One end of the rotating hollow shaft is fixed with the clamping jaw air cylinder through the air cylinder seat, the output end of the clamping jaw air cylinder is connected with one end of the clamping jaw pull rod, the other end of the rotating hollow shaft is provided with a clamping seat, and the clamping seat is provided with a clamping guide rod; the gas path rotation converter is installed at the rear end of the clamping jaw air cylinder.

[0038] The other end of the clamping jaw pull rod is provided with a pull jaw seat, and the pull jaw seat is arranged in the clamping seat; the upper pull jaw and the lower pull jaw are rotatably arranged above and below the pull jaw seat, and the waist-shaped hole of the upper pull jaw and the lower pull jaw is provided with a limiting shaft to prevent the upper pull jaw and the lower pull jaw from rotating beyond the limit;

[0039] The upper pull jaw and the lower pull jaw are connected with the upper clamping plate and the lower clamping plate, and the upper clamping plate and the lower clamping plate are connected with the clamping linear bearing corresponding to the clamping guide rod;

[0040] The bottom of the left-and-right moving slide plate is provided with a zero position control air cylinder, and the output shaft of the zero position control air cylinder is provided with a zero position positioning pin; the zero position positioning pin passes through the fixing seat and corresponds to the zero position of the rotating hollow shaft.

[0041] As a preferred technical scheme, the left moving clamping mechanism further comprises a retreat prevention positioning plate and a retreat prevention air cylinder;

[0042] The retreat prevention positioning plate is arranged between the linear guide rails, the retreat prevention air cylinder is installed on the left-and-right moving slide plate, the output shaft of the retreat prevention air cylinder is provided with a retreat prevention positioning pin, and the retreat prevention positioning pin passes through the left-and-right moving slide plate and is arranged in the positioning hole of the retreat prevention positioning plate.

[0043] The utility model discloses the beneficial effect is:

[0044] The utility model discloses a left machine head main part and right mobile machine head main part's setting, cooperation drive wheel reduction motor and drive wheel main part have realized the efficient automation welding of round pipe workpieces and T-shaped workpieces, and the right mobile machine head main part can move stably on the fuselage guide rail through the cooperation of fuselage rack and longitudinal drive reduction motor, and the flexibility and application range of welding are increased.

[0045] The utility model discloses through left mobile clamping mechanism and right mobile clamping mechanism ensure the accurate clamping and positioning of workpiece, through the setting of zero position control cylinder and zero position positioning pin, guarantee the reset accuracy of clamping mechanism, thereby improved welding quality.

[0046] The utility model discloses through the setting of material feeding mechanism and unloading mechanism, make the workpiece loading and unloading process more convenient, and the material feeding mechanism can stably send workpiece into the welding position through the cooperation of first material feeding cylinder and second material feeding cylinder and the guiding effect of longitudinal roller main body, and the unloading mechanism realizes the quick unloading of workpiece through the cooperation of unloading cylinder and unloading guide rod connecting plate.

[0047] The utility model discloses through the setting of welding torch swing device, and welding torch can swing within a certain range, thereby realizing the all -round welding of workpiece, and swing welding mode can not only improve welding efficiency, but also can ensure the uniformity of welding quality. ACCURACY

[0048] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment or prior art description, and obviously, the drawing in the following description is only some embodiments of the utility model, and for ordinary skilled person in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0049] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0050] Figure 2 It is the plane structure schematic diagram of the utility model;

[0051] Figure 3 It is the left machine head main part structure schematic diagram of the utility model;

[0052] Figure 4 And Figure 5 It is the right mobile machine head main part structure schematic diagram of the utility model;

[0053] Figure 6 It is the material feeding mechanism structure schematic diagram of the utility model;

[0054] Figures 7-9 It is the welding torch swing device structure schematic diagram of the utility model;

[0055] Figure 10 It is the structure schematic view of the unloading mechanism of the utility model.

[0056] Figure 11 And Figure 12 It is the structure schematic view of the mobile clamping mechanism of the utility model.

[0057] BRIEF DESCRIPTION OF DRAWINGS:

[0058] 1, T-shaped workpiece; 2, round pipe workpiece; 3, main body of machine; 4, guide rail of machine; 5, middle tow wheel frame; 6, wheel frame locking hook; 7, middle tow wheel; 8, welding gun swing device; 9, material feeding mechanism; 10, driving chain; 11, driving wheel support; 12, driving wheel main body; 13, material discharging mechanism; 14, driving wheel speed reduction motor; 15, operation control screen; 16, left machine head main body; 17, left moving clamping mechanism; 19, left wire feeder; 20, right moving machine head main body; 21, right moving wire feeder; 22, right moving welding machine; 23, machine rack; 24, tow chain wire groove; 16.0, left machine head fixing plate; 16.1, left lifting nut; 16.2, left lifting screw rod; 16.3, left lifting screw rod seat; 16.4, left lifting motor; 16.5, left welding gun manual adjustment cross slide; 16.6, left pressure wheel cylinder; 16.8, left lifting guide rod; 16.9, left pressure wheel seat; 16.10, left pressure wheel main body; 20.0, right moving machine head slide plate; 20.2, right lifting guide rod; 20.3, right pressure wheel cylinder; 20.4, right lifting motor; 20.5, right up and down moving guide rod; 20.6, slide plate upper roller; 20.7, slide plate lower roller; 20.8, right welding gun swing device; 20.9, material discharging mechanism; 20.10, right pressure wheel seat; 20.11, right pressure wheel main body; 20.13, right material feeding mechanism; 20.14, right moving clamping mechanism; 20.15, guide rail side clamping roller; 20.17, longitudinal moving gear; 20.18, longitudinal driving speed reduction motor; 20.21, right welding gun manual adjustment cross slide; 8.0, swing device mounting seat plate; 8.1, up and down adjustment handle; 8.2, adjustment screw rod; 8.3, dovetail slide block; 8.4, motor fixing seat; 8.5, swing motor; 8.6, eccentric wheel; 8.8, welding gun swing slide block; 8.9, gun withdrawing cylinder; 8.10, rolling bearing; 8.11, swing slide block rebound spring; 9.0, material feeding machine seat; 9.1 second material feeding cylinder; 9.2, first material feeding cylinder; 9.3, up and down moving slide block; 9.4, guide rod main body; 9.5, material feeding guide rod connecting plate; 9.6, longitudinal roller rear support; 9.7, longitudinal roller shaft; 9.8, longitudinal roller main body; 9.9, longitudinal roller front support; 9.10, feeding supporting plate; 13.0, material discharging fixing plate; 13.2, material discharging guide rod main body; 13.3, material discharging cylinder; 13.6, material discharging guide rod connecting plate; 13.7, material discharging angle plate; 17.1, up and down moving slide plate; 17.2, feeding and withdrawing cylinder; 17.3, cylinder fixing seat; 17.4, straight line guide rail; 17.5, anti-withdrawing positioning plate; 17.6, up and down moving bearing; 17.7, up and down moving support; 17.8, left and right moving slide block; 17.9, left and right moving slide plate; 17.10, anti-withdrawing positioning pin; 17.11, anti-withdrawing cylinder; 17.12, air path rotary converter; 17.13, clamping jaw cylinder; 17.14, cylinder seat; 17.15, rotary hollow shaft; 17.16, telescopic straight line bearing; 17.17, clamp jaw pull rod; 17.18, fixed seat; 17.19, rotary bearing; 17.20, pull jaw seat; 17.21, upper pull jaw; 17.22, clamping guide rod; 17.23, clamping linear bearing; 17.24, upper clamping plate; 17.25, lower clamping plate; 17.27, lower pull jaw; 17.28, zero position positioning pin; 17.29, zero position control cylinder. DETAILED DESCRIPTION

[0059] All features disclosed in this specification, or all steps of any methods or processes disclosed in this specification, can be combined in any combination, except combinations where at least some of the features and / or steps are mutually exclusive.

[0060] As Figures 1-12 shown, the utility model discloses a kind of steel structure tie rod automatic welding machine, including body main body 3, left machine head main body 16 and right mobile machine head main body 20.

[0061] The both sides of body main body 3 are provided with body guide rail 4, and left machine head main body 16 is fixed to the left end of body main body 3, and right mobile machine head main body 20 is slidably arranged on body guide rail 4, wherein the right end side of body main body 3 is provided with body rack 23, and body rack 23 is driven with the movable end gear rack of right mobile machine head main body 20;The central part of body main body 3 is fixed with middle tow wheel bracket 5 by wheel bracket locking hook 6, and symmetrically provided with middle tow wheel 7 on middle wheel bracket;

[0062] The end of left machine head main body 16 and right mobile machine head main body 20 is equipped with drive wheel reduction motor 14 below, and the end of left machine head main body 16 and right mobile machine head main body 20 is equipped with drive wheel main body 12 by drive wheel support 11, and drive wheel main body 12 is connected by drive chain 10 between drive wheel reduction motor 14;The middle tow wheel 7 and drive wheel main body 12 are on the same axis, and the middle tow wheel 7 and drive wheel main body 12 are placed with round pipe workpiece 2;

[0063] Left machine head main body 16 and right mobile machine head main body 20 are respectively provided with left mobile clamping mechanism 17 and right mobile clamping mechanism 20.14, and the clamping end of left mobile clamping mechanism 17 and right mobile clamping mechanism 20.14 is fixed with T-shaped workpiece 1, and the both end positions of T-shaped workpiece 1 correspond to round pipe workpiece 2;

[0064] The left head body 16 is provided with a left wire feeder 19 on one side, and the right moving head body 20 is provided with a right moving wire feeder 21 on one side; the front end of the drive wheel support 11 of the left head body 16 and the right moving head body 20 is provided with a material feeding mechanism 9, and the rear end of the drive wheel support 11 of the left head body 16 and the right moving head body 20 is provided with a material discharging mechanism 20.9; the lower part of the left head body 16 and the right moving head body 20 is provided with a welding gun swing device 8; the bottom of the machine body 3 is provided with a drag chain wire slot 24, and the drag chain of the right moving head body 20 is arranged in the drag chain wire slot 24.

[0065] The left head body 16 is provided with an operation control screen 15.

[0066] The left head body 16 includes a left head body 16 fixed plate and a left head box arranged on the left head body 16 fixed plate; the left moving clamping mechanism 17 is arranged in the left head box;

[0067] The left head box is provided with a left lifting motor 16.4 on the upper part, and a left lifting screw rod 16.2 seat is arranged on the output shaft of the left moving motor, and a left lifting screw rod 16.2 main body is fixed on the left lifting screw rod 16.2 seat; the right lifting nut is connected to the moving clamping mechanism through the right up-down moving guide rod 20.5, and the right lifting screw rod main body is connected with the right lifting nut, and the right moving clamping mechanism 20.14 is driven to move by driving the right moving motor to rotate;

[0068] The other side of the upper part of the left head box is provided with a left pressure roller cylinder 16.6, and the output shaft end of the left pressure roller cylinder 16.6 is provided with a left pressure roller seat 16.9; the lower part of the left pressure roller seat 16.9 is provided with a left pressure roller main body 16.10, and the left pressure roller main body 16.10 corresponds to the position of the circular pipe workpiece 2;

[0069] The left pressure roller seat 16.9 is provided with a left lifting guide rod 16.8, and the left head box is provided with a linear bearing corresponding to the lifting guide rod, and the left lifting guide rod 16.8 is arranged in the linear bearing, thereby achieving the effect of auxiliary guide;

[0070] One end of the left pressure roller seat 16.9 is provided with a left welding gun manual adjustment cross slide 16.5, and the welding gun swing device 8 is slidably arranged on the left welding gun manual adjustment cross slide 16.5.

[0071] In order to facilitate the movement of the right moving head body 20, in the embodiment, the right moving head body 20 includes a right moving head slide plate 20.0 and a right moving head box;

[0072] The right moving head box is arranged on the right moving head slide plate 20.0, and guide rail side clamping rollers 20.15 are arranged on the periphery of the right moving head slide plate 20.0, and the guide rail side clamping rollers 20.15 are in contact with the machine body guide rail 4;

[0073] One side of the right moving head slide plate 20.0 is provided with a longitudinal driving speed reduction motor 20.18, and a longitudinal moving gear 20.17 is arranged on the output shaft of the longitudinal driving speed reduction motor 20.18; the longitudinal moving gear 20.17 is engaged with the machine body rack 23 on the side surface of the machine body main body 3, thereby driving the right moving head slide plate 20.0 to move;

[0074] The upper periphery of the right moving head slide plate 20.0 is provided with a slide plate upper roller 20.6, and the lower periphery of the right moving head slide plate 20.0 is provided with a slide plate lower roller 20.7, and the slide plate upper roller 20.6 and the slide plate lower roller 20.7 guide the sliding movement;

[0075] The right lifting motor 20.4 is arranged on the upper side of the right moving head box, a right lifting screw rod seat is arranged on the output shaft of the right moving motor, and a right lifting screw rod main body is fixed on the right lifting screw rod seat; the right lifting nut is connected to the right upper and lower moving guide rod 20.5 of the moving clamping mechanism, the right lifting screw rod main body is connected to the right lifting nut, the right moving motor is driven to rotate, and the right moving clamping mechanism 20.14 is driven to move;

[0076] The right pressure roller cylinder 20.3 is arranged on the other side of the upper side of the right moving head box, and the right pressure roller seat 20.10 is arranged on the output shaft end of the right pressure roller cylinder 20.3; the right pressure roller main body 20.11 is arranged below the right pressure roller seat 20.10, and the right pressure roller main body 20.11 corresponds to the position of the circular pipe workpiece 2;

[0077] The right lifting guide rod 20.2 is arranged on the right pressure roller seat 20.10, and the right moving head box is provided with a linear bearing corresponding to the lifting guide rod, and the right lifting guide rod 20.2 is arranged in the linear bearing, thereby achieving the effect of auxiliary guiding;

[0078] The right pressure roller seat 20.10 is provided with a right welding gun hand adjustment cross slide block, and the welding gun swing device 8 is arranged on the right welding gun hand adjustment cross slide block.

[0079] In order to realize the effect of material lifting, in the embodiment, the material lifting mechanism 9 includes a material lifting seat 9.0, a first material lifting cylinder 9.2, a second material lifting cylinder 9.1, an up and down moving sliding block 9.3, a material lifting guide rod connecting plate 9.5, and a feeding supporting plate 9.10;

[0080] The output shaft of the first lifting cylinder 9.2 is installed below the lifting machine base 9.0, and the second lifting cylinder 9.1 is installed above the lifting machine base 9.0. A lifting guide rod connecting plate 9.5 is installed on the output shaft of the second lifting cylinder 9.1, and longitudinal roller rear support 9.6 and longitudinal roller front support 9.9 are respectively provided on the upper two sides of the lifting guide rod connecting plate 9.5. A longitudinal roller body 9.8 is rotatably arranged between the longitudinal roller rear support 9.6 and the longitudinal roller front support 9.9 through a longitudinal roller shaft 9.7. The feeding plate 9.10 is installed on one side of the longitudinal roller front support 9.9. Up and down sliding blocks 9.3 are provided on both sides of the lifting machine base 9.0, and a guide rail body is provided below the lifting guide rod connecting plate 9.5, and the guide rail body is guided on the up and down sliding blocks 9.3 on both sides of the lifting machine base 9.0.

[0081] For welding purposes, in this embodiment, the welding torch swing device 8 is mounted on the left welding torch manual adjustment cross slider 16.5 via a swing device mounting plate 8.0. The welding torch swing device 8 includes a swing device mounting plate 8.0, a swing motor up and down adjustment handle 8.1, an adjustment screw 8.2, a dovetail slider 8.3, a motor fixing seat 8.4, a swing motor 8.5, an eccentric wheel 8.6, a fixed guide rod 8.7, a welding torch swing slider 8.8, a torch retraction cylinder 8.9, a rolling bearing 8.10, a swing slider return spring 8.11, and a swing device housing 8.12.

[0082] The dovetail slider 8.3 is guided and located inside the rear of the swivel gun housing 8.12, and a motor mounting base 8.4 is installed at the front end of the dovetail slider 8.3, with the swivel gun motor 8.5 mounted on the motor mounting base 8.4;

[0083] The bottom of the swing gun housing 8.12 is provided with an adjusting screw 8.2 via a bearing, and the adjusting end of the adjusting screw is connected to the adjusting hole of the dovetail slider 8.3. The other end of the adjusting screw 8.2 is connected to the swing gun motor up and down adjusting handle 8.1. By rotating the swing gun motor up and down adjusting handle 8.1, the dovetail slider 8.3 is driven to move up and down.

[0084] The inside of the oscillating gun housing 8.12 is provided with a fixed guide rod 8.7, and the welding gun oscillating slider 8.8 is guided and disposed on the fixed guide rod 8.7. A swing slider return spring 8.11 is provided between the fixed guide rod 8.7 and the welding gun oscillating slider 8.8. A gun retraction cylinder 8.9 is installed at the front end of the oscillating gun housing 8.12, and the output shaft of the gun retraction cylinder 8.9 passes through the oscillating gun housing 8.12 and is connected to the welding gun oscillating slider 8.8.

[0085] The output shaft of the swing gun motor 8.5 is provided with an eccentric wheel 8.6, the swing slide block 8.8 is provided with a rolling bearing 8.10, and the eccentric wheel 8.6 is in contact with the rolling bearing 8.10. By rotating the eccentric wheel 8.6, the swing slide block 8.8 is swung under the action of the swing slide block rebound spring 8.11.

[0086] In order to facilitate unloading, in the embodiment, the unloading mechanism 20.9 includes an unloading fixed plate 13.0, an unloading cylinder 13.3, an unloading guide rod connecting plate 13.6, and an unloading angle plate 13.7.

[0087] The unloading cylinder 13.3 is installed at the bottom of the unloading fixed plate 13.0, and the output shaft of the unloading cylinder 13.3 penetrates through the unloading fixed plate 13.0 and is connected with the unloading guide rod connecting plate 13.6; the unloading angle plate 13.7 is installed above the unloading guide rod connecting plate 13.6.

[0088] The unloading fixed plate 13.0 is provided with linear bearings on both sides, and the unloading guide rod connecting plate 13.6 is provided with a unloading guide rod body 13.2 below, and the unloading guide rod body 13.2 is guided to be arranged in the linear bearings.

[0089] In order to achieve the effect of clamping and positioning, in the embodiment, the left moving clamping mechanism 17 and the right moving clamping mechanism 20.14 each include an up-down moving slide plate 17.1, a forward-backward cylinder 17.2, an up-down moving support 17.7, a left-right moving slide block 17.8, a left-right moving slide plate 17.9, a gas circuit rotary converter 17.12, a clamping jaw cylinder 17.13, a cylinder seat 17.14, a rotary hollow shaft, an extension linear bearing 17.16, a clamping jaw pull rod 17.17, a rotary bearing 17.19, a pull jaw seat 17.20, an upper pull jaw 17.21, a clamping guide rod 17.22, an upper clamping linear bearing 17.23, an upper clamping plate 17.24, a lower clamping plate 17.25, a lower clamping linear bearing 17.23, a lower pull jaw 17.27, a zero position positioning pin 17.28, and a zero position control cylinder 17.29.

[0090] The up-down moving support 17.7 is installed on the up-down moving slide plate 17.1, and a right lifting nut or a right lifting screw is fixed on the up-down moving support 17.7; the side surface of the up-down moving slide plate 17.1 is provided with an up-down moving bearing 17.6, and the up-down moving bearing 17.6 is guided by a right up-down moving guide rod 20.5 or a left up-down moving guide rod; the forward-backward cylinder 17.2 is installed on the up-down moving slide plate 17.1 through a cylinder fixed seat 17.18 17.3; the up-down moving slide plate 17.1 is provided with a linear guide rail 17.4, and the left-right moving slide plate 17.9 is slidably arranged on the linear guide rail 17.4 through the left-right moving slide block 17.8; the output end of the forward-backward cylinder 17.2 is connected with the left-right moving slide plate 17.9.

[0091] The fixed seat 17.18 is installed on the up-and-down moving slide plate 17.1, and the rotating hollow shaft is installed inside the fixed seat 17.18 through the rotating bearing 17.19; the telescopic linear bearing 17.16 is installed on the rotating hollow shaft, and the clamping jaw pull rod 17.17 is arranged on the telescopic linear bearing 17.16 in a guided manner.

[0092] One end of the rotating hollow shaft is fixed with the clamping jaw air cylinder 17.13 through the air cylinder seat 17.14, the output end of the clamping jaw air cylinder 17.13 is connected with one end of the clamping jaw pull rod 17.17, the other end of the rotating hollow shaft is provided with a clamping seat, and the clamping guide rod 17.22 is arranged on the clamping seat; the air path rotating converter is installed at the rear end of the clamping jaw air cylinder 17.13.

[0093] The other end of the clamping jaw pull rod 17.17 is installed with the pull jaw seat 17.20, and the pull jaw seat 17.20 is arranged in the clamping seat; the upper pull jaw 17.21 and the lower pull jaw 17.27 are arranged in a rotating manner above and below the pull jaw seat 17.20, and the limit shaft is arranged on the waist-shaped hole of the upper pull jaw 17.21 and the lower pull jaw 17.27 to prevent the upper pull jaw 17.21 and the lower pull jaw 17.27 from rotating out of range;

[0094] The upper pull jaw 17.21 and the lower pull jaw 17.27 are connected with the upper clamping plate 17.24 and the lower clamping plate 17.25 respectively, and the upper clamping plate 17.24 and the lower clamping plate 17.25 are connected with the clamping linear bearing 17.23 corresponding to the clamping guide rod 17.22.

[0095] The zero position control air cylinder 17.29 is installed at the bottom of the left-and-right moving slide plate 17.9, and the zero position positioning pin 17.28 is installed on the output shaft of the zero position control air cylinder 17.29; the zero position positioning pin 17.28 penetrates through the fixed seat 17.18 and corresponds to the zero position of the rotating hollow shaft.

[0096] In order to achieve the positioning effect, in the embodiment, the left moving clamping mechanism 17 further comprises the anti-back positioning plate 17.5 and the anti-back air cylinder 17.11.

[0097] The anti-back positioning plate 17.5 is arranged between the linear guide rails 17.4, the anti-back air cylinder 17.11 is installed on the left-and-right moving slide plate 17.9, the anti-back positioning pin 17.10 is installed on the output shaft of the anti-back air cylinder 17.11, and the anti-back positioning pin 17.10 penetrates through the left-and-right moving slide plate 17.9 and is arranged in the positioning hole of the anti-back positioning plate 17.5.

[0098] The working principle is as follows:

[0099] The right moving machine head body is driven to move along the machine body rack by a longitudinal driving speed reduction motor, so that the length of the round pipe workpiece can be self-defined to adapt, and the flexibility and application range of welding are increased,

[0100] The left moving clamping mechanism and the right moving clamping mechanism are respectively fixed on the left machine head body and the right moving machine head body, and are used for clamping the T-shaped workpiece; through the setting of the zero position control cylinder and the zero position positioning pin, the reset precision of the clamping mechanism is ensured, and the welding quality is improved.

[0101] During welding, the round pipe workpiece is placed on the middle tow wheel and the driving wheel body, and corresponds to the position of the T-shaped workpiece, the left moving clamping mechanism is moved to make the T-shaped workpiece contact with the round pipe workpiece, and positioning is performed through the anti-back positioning plate and the anti-back cylinder; since the welding gun swing device is arranged on the right pressure wheel seat and the left pressure wheel seat and can be slidably adjusted, the welding gun can swing within a certain range, and the workpiece is subjected to omnidirectional welding.

[0102] When discharging, the clamping mechanisms on the left and right sides and the pressure wheel body are loosened, then the workpiece is stably fed into the welding position through the cooperation of the first material lifting cylinder and the second material lifting cylinder and the guiding effect of the longitudinal roller body; the unloading mechanism realizes quick unloading of the workpiece through the cooperation of the unloading cylinder and the unloading guide rod connecting plate.

[0103] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any change or replacement without creative labor is covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited by the protection scope defined in the claims.

Claims

1. A steel structure tie rod automatic welding machine, characterized in that, It comprises a fuselage body (3), a left head body (16) and a right moving head body (20); Both sides of the fuselage body (3) are provided with fuselage guide rails (4), the left head body (16) is fixed to the left end of the fuselage body (3), and the right moving head body (20) is slidingly arranged on the fuselage guide rails (4), wherein a fuselage rack (23) is arranged on the right end of the fuselage body (3), and the fuselage rack (23) is in transmission with the movable end gear rack of the right moving head body (20); the central part of the fuselage body (3) is fixed with an intermediate towing wheel carrier (5) through a wheel carrier locking hook (6), and the intermediate towing wheel carrier is symmetrically provided with intermediate towing wheels (7); The end part of the left head body (16) and the right moving head body (20) is provided with a driving wheel reduction motor (14), the end part of the left head body (16) and the right moving head body (20) is provided with a driving wheel body (12) through a driving wheel support (11), and the driving wheel body (12) and the driving wheel reduction motor (14) are connected through a driving chain (10); the intermediate towing wheel (7) and the driving wheel body (12) are on the same axis, and the intermediate towing wheel (7) and the driving wheel body (12) are placed with a round pipe workpiece (2); The left head body (16) and the right moving head body (20) are respectively provided with a left moving clamping mechanism (17) and a right moving clamping mechanism (20.14), the clamping end of the left moving clamping mechanism (17) and the right moving clamping mechanism (20.14) is fixed with a T-shaped workpiece (1), and the T-shaped workpiece (1) corresponds to the positions of the two ends of the round pipe workpiece (2); One side of the left head body (16) is provided with a left wire feeder (19), and one side of the right moving head body (20) is provided with a right moving wire feeder (21); the front end of the driving wheel support (11) of the left head body (16) and the right moving head body (20) is provided with a material feeding mechanism (9), and the rear end of the driving wheel support (11) of the left head body (16) and the right moving head body (20) is provided with a material discharging mechanism (20.9); the lower part of the left head body (16) and the right moving head body (20) is provided with a welding gun swing device (8); the bottom of the fuselage body (3) is provided with a tow chain wire groove (24), and the tow chain of the right moving head body (20) is arranged in the tow chain wire groove (24); An operation control screen (15) is arranged on the left head body (16).

2. The automatic steel structure tie-bar welding machine according to claim 1, characterized in that: The left head body (16) comprises a left head body (16) fixed plate and a left head box arranged on the left head body (16) fixed plate; the left moving clamping mechanism (17) is arranged in the left head box; The upper part of the left head box body is provided with a left lifting motor (16.4), and the output shaft of the left moving motor is provided with a left lifting screw rod (16.2) seat, and the left lifting screw rod (16.2) seat is fixed with a left lifting screw rod (16.2) body; the moving clamping mechanism is connected with a right lifting nut through a right up and down moving guide rod (20.5), and the right lifting screw rod body is connected with the right lifting nut, and the right moving motor is driven to rotate to drive the right moving clamping mechanism (20.14) to move; The upper part of the left head box body is provided with a left lifting motor (16.4), and the output shaft of the left moving motor is provided with a left lifting screw rod (16.2) seat, and the left lifting screw rod (16.2) seat is fixed with a left lifting screw rod (16.2) body; the moving clamping mechanism is connected with a right lifting nut through a right up and down moving guide rod (20.5), and the right lifting screw rod body is connected with the right lifting nut, and the right moving motor is driven to rotate to drive the right moving clamping mechanism (20.14) to move; The upper part of the left head box body is provided with a left lifting motor (16.4), and the output shaft of the left moving motor is provided with a left lifting screw rod (16.2) seat, and the left lifting screw rod (16.2) seat is fixed with a left lifting screw rod (16.2) body; the moving clamping mechanism is connected with a right lifting nut through a right up and down moving guide rod (20.5), and the right lifting screw rod body is connected with the right lifting nut, and the right moving motor is driven to rotate to drive the right moving clamping mechanism (20.14) to move; The left pressure roller seat (16.9) is provided with a left lifting guide rod (16.8), and the left head box body is provided with a linear bearing corresponding to the lifting guide rod, and the left lifting guide rod (16.8) is arranged in the linear bearing, thereby achieving the effect of auxiliary guiding.

3. The automatic steel structure tie-bar welding machine according to claim 1, characterized in that: The left pressure roller seat (16.9) is provided with a left lifting guide rod (16.8), and the left head box body is provided with a linear bearing corresponding to the lifting guide rod, and the left lifting guide rod (16.8) is arranged in the linear bearing, thereby achieving the effect of auxiliary guiding. The left pressure roller seat (16.9) is provided with a left lifting guide rod (16.8), and the left head box body is provided with a linear bearing corresponding to the lifting guide rod, and the left lifting guide rod (16.8) is arranged in the linear bearing, thereby achieving the effect of auxiliary guiding. The right moving head body (20) comprises a right moving head sliding plate (20.0) and a right moving head box body; The right moving head box body is arranged on the right moving head sliding plate (20.0), and the right moving head sliding plate (20.0) is provided with guide rail side clamping rollers (20.15) around; The right moving head sliding plate (20.0) is provided with a longitudinal driving speed reducer motor (20.18) on one side, and the output shaft of the longitudinal driving speed reducer motor (20.18) is provided with a longitudinal moving gear (20.17); the longitudinal moving gear (20.17) is engaged with the body rack (23) on the side surface of the body main body (3), thereby driving the right moving head sliding plate (20.0) to move; The upper part of the right moving head box body is provided with a right lifting motor (20.4), and the output shaft of the right moving motor is provided with a right lifting screw rod seat, and the right lifting screw rod seat is fixed with a right lifting screw rod body; the moving clamping mechanism is connected with a right lifting nut through a right up and down moving guide rod (20.5), and the right lifting screw rod body is connected with the right lifting nut, and the right moving motor is driven to rotate to drive the right moving clamping mechanism (20.14) to move; The upper side of the right moving head box is provided with a right pressure roller cylinder (20.3), and the output shaft end of the right pressure roller cylinder (20.3) is provided with a right pressure roller seat (20.10); the lower side of the right pressure roller seat (20.10) is provided with a right pressure roller body (20.11), and the right pressure roller body (20.11) corresponds to the position of the circular pipe workpiece (2); The right pressure roller seat (20.10) is provided with a right lifting guide rod (20.2), and the right moving head box is provided with a linear bearing corresponding to the lifting guide rod, and the right lifting guide rod (20.2) is arranged in the linear bearing, thereby achieving the effect of auxiliary guiding; One end of the right pressure roller seat (20.10) is provided with a right welding gun hand adjusting cross slider, and the welding gun swing device (8) is slidably arranged on the right welding gun hand adjusting cross slider.

4. The automatic steel structure tie-bar welding machine according to claim 1, characterized in that: The feeding mechanism (9) comprises a feeding mechanism seat (9.0), a first feeding cylinder (9.2), a second feeding cylinder (9.1), an up-down moving slider (9.3), a feeding guide rod connecting plate (9.5) and a feeding supporting plate (9.10); The output shaft of the first feeding cylinder (9.2) is arranged below the feeding mechanism seat (9.0), and the second feeding cylinder (9.1) is arranged above the feeding mechanism seat (9.0); the output shaft of the second feeding cylinder (9.1) is provided with a feeding guide rod connecting plate (9.5), and the upper sides of the feeding guide rod connecting plate (9.5) are respectively provided with a longitudinal roller rear support (9.6) and a longitudinal roller front support (9.9); the longitudinal roller rear support (9.6) and the longitudinal roller front support (9.9) are rotatably provided with a longitudinal roller body (9.8) through a longitudinal roller shaft (9.7); the feeding supporting plate (9.10) is arranged on one side of the longitudinal roller front support (9.9); the feeding mechanism seat (9.0) is provided with an up-down moving slider (9.3) on both sides, and a guide rail body is arranged below the feeding guide rod connecting plate (9.5) and is guided on the up-down moving sliders (9.3) on both sides of the feeding mechanism seat (9.0).

5. The automatic steel structural tie rod welding machine of claim 1, wherein: The welding gun swing device (8) is installed on the left welding gun hand adjusting cross slider (16.5) through a swing device mounting seat plate (8.0), and the welding gun swing device (8) comprises the swing device mounting seat plate (8.0), a swing motor up-down adjusting handle (8.1), an adjusting screw rod (8.2), a dovetail slider (8.3), a motor fixing seat (8.4), a swing motor (8.5), an eccentric wheel (8.6), a fixed guide rod (8.7), a welding gun swing slider (8.8), a gun retraction cylinder (8.9), a rolling bearing (8.10), a swing slider rebound spring (8.11) and a swing device shell (8.12); The dovetail slider (8.3) is arranged in the rear of the swing device shell (8.12), and the front end of the dovetail slider (8.3) is provided with the motor fixing seat (8.4), and the swing motor (8.5) is arranged on the motor fixing seat (8.4); The bottom of the swing gun device shell (8.12) is provided with an adjusting screw rod (8.2) through a bearing, and the adjusting end of the adjusting screw rod is connected with the adjusting hole of the dovetail slider (8.3); the other end of the adjusting screw rod (8.2) is connected with a swing gun motor up-down adjusting handle (8.1); the swing gun motor up-down adjusting handle (8.1) is rotated to drive the dovetail slider (8.3) to move up and down; The inside of the swing gun device shell (8.12) is provided with a fixed guide rod (8.7), and the welding gun swing slider (8.8) is guided to be arranged on the fixed guide rod (8.7); the swing slider rebound spring (8.11) is arranged between the fixed guide rod (8.7) and the welding gun swing slider (8.8); the front end of the swing gun device shell (8.12) is provided with a welding gun withdrawing cylinder (8.9), and the output shaft of the welding gun withdrawing cylinder (8.9) penetrates through the swing gun device shell (8.12) and is connected with the welding gun swing slider (8.8); The output shaft of the swing gun motor (8.5) is provided with an eccentric wheel (8.6); the welding gun swing slider (8.8) is provided with a rolling bearing (8.10); the eccentric wheel (8.6) is in contact with the rolling bearing (8.10); the eccentric wheel (8.6) is rotated, and the welding gun swing slider (8.8) is driven to swing under the action of the swing slider rebound spring (8.11).

6. The automatic steel structural tie rod welding machine of claim 1, wherein: The unloading mechanism (20.9) comprises an unloading fixed plate (13.0), an unloading cylinder (13.3), an unloading guide rod connecting plate (13.6) and an unloading angle plate (13.7); The unloading cylinder (13.3) is arranged at the bottom of the unloading fixed plate (13.0), and the output shaft of the unloading cylinder (13.3) penetrates through the unloading fixed plate (13.0) and is connected with the unloading guide rod connecting plate (13.6); the unloading angle plate (13.7) is arranged above the unloading guide rod connecting plate (13.6); The unloading fixed plate (13.0) is provided with linear bearings on both sides, and the unloading guide rod main body (13.2) is arranged below the unloading guide rod connecting plate (13.6), and the unloading guide rod main body (13.2) is guided to be arranged in the linear bearings.

7. The automatic steel structural tie rod welding machine of claim 1, wherein: The left moving clamping mechanism (17) and the right moving clamping mechanism (20.14) each comprise an up-down moving slide plate (17.1), an advance-retreat cylinder (17.2), an up-down moving support (17.7), a left-right moving slider (17.8), a left-right moving slide plate (17.9), a gas path rotary converter (17.12), a clamping jaw cylinder (17.13), a cylinder seat (17.14), a rotary hollow shaft, an extension linear bearing (17.16), a clamping jaw pull rod (17.17), a rotary bearing (17.19), a pull jaw seat (17.20), an upper pull jaw (17.21), a clamping guide rod (17.22), an upper clamping linear bearing (17.23), an upper clamping plate (17.24), a lower clamping plate (17.25), a lower clamping linear bearing (17.23), a lower pull jaw (17.27), a zero position positioning pin (17.28) and a zero position control cylinder (17.29). The up-and-down moving bracket (17.7) is installed on the up-and-down moving slide plate (17.1), and a right lifting nut or a right lifting screw is fixed on the up-and-down moving bracket (17.7); the side surface of the up-and-down moving slide plate (17.1) is provided with an up-and-down moving bearing (17.6), and the up-and-down moving bearing (17.6) is guided by a right up-and-down moving guide rod or a left up-and-down moving guide rod; the advance-and-retreat air cylinder (17.2) is installed on the up-and-down moving slide plate (17.1) through an air cylinder fixing seat (17.18) (17.3); the up-and-down moving slide plate (17.1) is provided with a linear guide rail (17.4), and the left-and-right moving slide plate (17.9) is slidably arranged on the linear guide rail (17.4) through a left-and-right moving slide block (17.8); the output end of the advance-and-retreat air cylinder (17.2) is connected with the left-and-right moving slide plate (17.9); The up-and-down moving slide plate (17.1) is installed with a fixing seat (17.18), and a rotating hollow shaft is installed on the inner side of the fixing seat (17.18) through a rotating bearing (17.19); the inner side of the rotating hollow shaft is installed with a telescopic linear bearing (17.16), and the telescopic linear bearing (17.16) is guided by a clamping jaw pull rod (17.17) arranged thereon; One end of the rotating hollow shaft is fixed with a clamping jaw air cylinder (17.13) through an air cylinder seat (17.14), the output end of the clamping jaw air cylinder (17.13) is connected with one end of the clamping jaw pull rod (17.17), and the other end of the rotating hollow shaft is provided with a clamping seat, and the clamping seat is provided with a clamping guide rod (17.22); The other end of the clamping jaw pull rod (17.17) is installed with a pull jaw seat (17.20), and the pull jaw seat (17.20) is arranged in the clamping seat; the upper pull jaw (17.21) and the lower pull jaw (17.27) are rotatably arranged above and below the pull jaw seat (17.20), and the waist-shaped holes of the upper pull jaw (17.21) and the lower pull jaw (17.27) are provided with limit shafts to prevent the upper pull jaw (17.21) and the lower pull jaw (17.27) from rotating beyond the range; The upper pull jaw (17.21) and the lower pull jaw (17.27) are respectively connected with an upper clamping plate (17.24) and a lower clamping plate (17.25), and the upper clamping plate (17.24) and the lower clamping plate (17.25) are connected with a clamping linear bearing (17.23) corresponding to the clamping guide rod (17.22); The bottom of the left-and-right moving slide plate (17.9) is installed with a zero position control air cylinder (17.29), and a zero position positioning pin (17.28) is installed on the output shaft of the zero position control air cylinder (17.29); the zero position positioning pin (17.28) penetrates through the fixing seat (17.18) and corresponds to the zero position of the rotating hollow shaft; the air path rotary converter is installed at the rear end of the clamping jaw air cylinder (17.13).

8. The automatic steel structure tie-bar welding machine according to claim 7, characterized in that: The left moving clamping mechanism (17) further comprises a retreat prevention positioning plate (17.5) and a retreat prevention air cylinder (17.11). The anti-backup positioning plate (17.5) is arranged between the linear guide rails (17.4), the anti-backup cylinder (17.11) is installed on the left-right moving slide plate (17.9), and the output shaft of the anti-backup cylinder (17.11) is provided with an anti-backup positioning pin (17.10), and the anti-backup positioning pin (17.10) penetrates through the left-right moving slide plate (17.9) and is arranged in the positioning hole of the anti-backup positioning plate (17.5).

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