A butt welding fixture for plate components

Abstract

The present invention discloses a butt welding fixture for plate parts, which includes a base and a pad adjusting device, an anti-deformation prefabrication device and two limit pressing devices arranged on the base. The two limit pressing devices are symmetrically arranged on the left and right sides of the pad adjusting device. The anti-deformation prefabrication device includes two angle bottom plates symmetrically arranged on the left and right sides of the pad adjusting device. The inner ends of the two angle bottom plates are respectively close to the left and right sides of the pad adjusting device and are rotatably connected to the base. The two angle bottom plates are connected to an angle driving device to synchronously adjust the angles of the two angle bottom plates for prefabricating the anti-deformation angle of the steel plate. The two limit pressing devices are respectively arranged above the angle bottom plates on the corresponding sides. The present invention can prefabricate the anti-deformation of the steel plate before welding. When the anti-deformation of the steel plate is completely offset, it automatically becomes rigidly fixed to prevent the further deformation of the steel plate, ensuring that the steel plate is flat and meets the use requirements after welding, and can also test the reasonable prefabrication angle before welding.

Description

Technical Field

[0001] The present invention relates to the technical field of steel plate welding, and particularly relates to a butt welding and assembly fixture for plates, which eliminates angular deformation after steel plate welding by prefabricating anti-deformation before welding and tests a reasonable prefabrication angle before steel plate welding. Background Art

[0002] During steel plate welding, under the action of thermal expansion and contraction of metal, weld shrinkage will cause angular deformation, resulting in an uneven steel plate. Steel plates that do not meet the usage requirements need to be repaired. The greater the deformation amount, the more difficult the repair, and the more manpower and materials are consumed, and problems are likely to occur.

[0003] Common countermeasures for welding deformation are prefabricating anti-deformation and rigid fixation. The amount of prefabricated anti-deformation is related to the thickness of the steel plate and the size of the weld, and the operator can only judge based on experience. If the amount of prefabricated anti-deformation is not well grasped and cannot completely offset the welding deformation amount, deformation will still exist. Rigid fixation usually uses welding with backing plates, which requires consuming backing plates. The welding and removal of backing plates will not only damage the steel plate, but also greatly affect production efficiency, and there is a large amount of welding residual stress. Summary of the Invention

[0004] In order to solve the defects existing in the above technology, the present invention provides a butt welding and assembly fixture for plates, which prefabricates an anti-deformation angle before welding to eliminate the angular deformation after steel plate welding and tests a reasonable prefabrication angle before steel plate welding.

[0005] The technical solution adopted by the present invention to achieve the above technical effects is as follows:

[0006] A butt welding and assembly fixture for plates includes a base, a weld pad adjusting device, an anti-deformation prefabrication device, and two limit pressing devices provided on the base. The two limit pressing devices are symmetrically arranged on the left and right sides of the weld pad adjusting device. The anti-deformation prefabrication device includes two angle bases symmetrically arranged on the left and right sides of the weld pad adjusting device. The inner ends of the two angle bases are respectively close to the left and right sides of the weld pad adjusting device and are rotatably connected to the base. The two angle bases are connected to an angle driving device to synchronously adjust the angles of the two angle bases and prefabricate the anti-deformation angle of the steel plate. The two limit pressing devices are respectively arranged above the corresponding angle bases on the corresponding sides.

[0007] Preferably, in the above butt welding and assembly fixture for plates, a shaft-like rotating end is formed at the inner end of the angle base. The rotating shafts at both ends of the shaft-like rotating end are rotatably connected to the base. A welding operation space is provided between the shaft-like rotating ends of the two angle bases, and the weld pad adjusting device is located in the welding operation space.

[0008] Preferably, in the above-mentioned plate butt welding frame, the angle driving device includes an angle base plate transmission rod, an angle base plate handwheel connected to the angle base plate transmission rod, and two linkage mechanisms respectively connected to the two angle bases, and the two linkage mechanisms are synchronously connected to the angle base plate transmission rod.

[0009] Preferably, in the above-mentioned plate butt welding assembly frame, the linkage mechanism includes a connecting rod, a screw slide and an angle base screw, one end of the connecting rod is hinged to the angle base, and the other end is hinged to the screw slide, the screw slide is transmission connected to the angle base screw, and the angle base screw is transmission connected to the angle base transmission rod through a bevel gear pair at the inner end.

[0010] Preferably, in the above-mentioned panel butt welding assembly frame, the welding pad adjustment device includes a welding pad bracket, a welding pad arranged on the welding pad bracket, and an up and down adjustment mechanism connected to the bottom of the welding pad bracket to drive the welding pad bracket to fine-tune in the vertical direction.

[0011] Preferably, in the above-mentioned plate butt welding assembly frame, the up and down adjustment mechanism includes a welding pad adjustment screw rotatably connected to the base, the middle section of the welding pad adjustment screw is provided with a limiting sleeve, and the two ends are provided with threaded sections with opposite rotation directions, and the threaded sections at the two ends are sleeved with welding pad adjustment nuts that can approach or move away from each other, the upper end of the welding pad adjustment nut is formed with a slope surface that contacts the end surface of the welding pad bracket, and the outer end of the welding pad adjustment screw is connected to a welding pad adjustment handwheel.

[0012] Preferably, in the above-mentioned panel butt welding jig, weld joint measuring column seats are provided at both ends of the welding pad, weld joint measuring columns are provided on the weld joint measuring column seats, and the weld joint measuring columns are located on the center line of the welding pad.

[0013] Preferably, in the above-mentioned plate butt welding frame, the limiting and clamping device includes two brackets, sliders respectively fixed on the inner sides of the two brackets, and a crossbeam adjustable up and down between the two brackets, and the sliders are horizontally slidably connected to the base.

[0014] Preferably, in the above-mentioned plate butt welding frame, the two ends of the beam are provided with limit support arms that can be slidably connected to the two brackets up and down, and the brackets are provided with fixing nuts, and screws are respectively connected between the two fixing nuts and the two ends of the beam, the lower end of the screw is threadedly connected to the fixing nut, and the upper end passes through the beam, and the upper end of the screw is fixed with a screw limit stop on the side located on the upper surface of the beam, and a shaft retaining ring is fixed on the side located on the lower surface of the beam, the upper end of one of the screws is connected to a beam up and down adjustment handwheel, and a beam lead screw is connected to one side of the upper surface of the beam, and the two ends of the beam lead screw are respectively connected to the screw at the corresponding end through a bevel gear pair.

[0015] Preferably, in the above-mentioned plate butt welding frame, the base is further provided with an anti-dropping limiting device for limiting the sliding block in the horizontal direction.

[0016] The beneficial effects of the present invention are as follows: the plate butt welding frame of the present invention is used to preform the reverse deformation of the steel plate before welding, and allows it to shrink freely after welding. When the reverse deformation of the steel plate is completely offset, it automatically becomes rigidly fixed, which can prevent the steel plate from further deformation, ensure that the steel plate is flat after welding to meet the use requirements, and can test the reasonable prefabrication angle before welding. Compared with the method of using a horse plate for rigid fixation in the prior art, the welding efficiency and welding quality are greatly improved. After the reverse deformation is offset, the steel plate can be prevented from further deformation, thereby achieving the effect of eliminating welding residual stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A perspective view of the present invention;

[0018] Figure 2 is a side view of the present invention;

[0019] Figure 3 A top view of the present invention;

[0020] Figure 4 It is a cross-sectional structural diagram of the present invention;

[0021] Figure 5 A three-dimensional diagram of the base of the present invention;

[0022] Figure 6 A three-dimensional diagram of the anti-deformation prefabrication device of the present invention;

[0023] Figure 7 A side view of the anti-deformation prefabrication device of the present invention;

[0024] Figure 8 is a three-dimensional diagram of the welding pad adjustment device of the present invention;

[0025] Figure 9Side view of the solder pad adjusting device of the present invention in the disassembled state;

[0026] Figure 10 State diagram in which the two limiting and pressing devices of the present invention are symmetrically arranged;

[0027] Figure 11 Three-dimensional view of the limiting and pressing device of the present invention;

[0028] Figure 12 Connection structure diagram of the screw rod, cross beam and bracket of the present invention. Detailed implementation manners

[0029] To further understand the present invention, the following further describes the present invention with reference to the accompanying drawings of the specification and specific embodiments:

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0031] For the convenience of description, spatial relative terms such as "above...", "above...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures" afterwards. Thus, the exemplary term "above..." can include two orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here. In addition, "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection through an intermediate medium; it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Please refer to Figure 1 、 Figure 2 and Figure 3 , as shown in the figure, an embodiment of the present invention provides a butt welding jig for plate members, which includes a base 1, and a weld pad adjusting device 2, an anti-deformation prefabrication device 3, and two limit pressing devices 4 provided on the base 1. Among them, the weld pad adjusting device 2 is used to ensure full penetration of the root of the steel plate joint and the formation of the back of the weld seam; the anti-deformation prefabrication device 3 is used to prefabricate the anti-deformation angle before steel plate welding; the limit pressing device 4 is used to press and fix the steel plate during the welding process, rigidly fix the steel plate, and prevent the steel plate from further deforming after the prefabricated anti-deformation angle is eliminated during the welding process. Specifically, as Figures 1 to 3 shown, the two limit pressing devices 4 are symmetrically arranged on the left and right sides of the weld pad adjusting device 2 for rigidly fixing the two butt-welded steel plates respectively. As Figure 6 and Figure 7 shown, the anti-deformation prefabrication device 3 includes two angle bottom plates 31 symmetrically arranged on the left and right sides of the weld pad adjusting device 2. Among them, the inner ends of the two angle bottom plates 31 are respectively arranged close to the left and right sides of the weld pad adjusting device 2 and are rotatably connected to the base 1. Specifically, the two angle bottom plates 31 are connected to an angle driving device, and the angles of the two angle bottom plates 31 can be synchronously adjusted through this angle driving device to prefabricate the anti-deformation angle of the steel plate. The two limit pressing devices 4 are respectively arranged above the corresponding side angle bottom plates 31, and the two steel plates to be welded are respectively fixed on the two angle bottom plates 31 through the two limit pressing devices 4. The anti-deformation angles of the two butt steel plates can be preset through the two angle bottom plates 31. When the steel plate is welded, angular deformation will be caused due to the shrinkage of the weld seam. When the preset anti-deformation is completely offset, the two limit pressing devices 4 are respectively flat-pressed on the corresponding side steel plates, and at this time, it automatically becomes a rigid fixation, which can prevent the steel plate from further deforming and ensure that the flatness of the steel plate after welding meets the use requirements.

[0034] Furthermore, in the preferred embodiment of the present invention, as Figure 6 and Figure 7As shown, the inner end of the angle base plate 31 is formed with an axis-like rotating end 311, and the two ends of the axis-like rotating end 311 are rotatably connected to the base 1 through a rotating shaft. Among them, a welding operation space 32 is provided between the axis-like rotating ends 311 of the two angle base plates 31, and the welding pad adjustment device 2 is located in the welding operation space 32. Specifically, the angle driving device includes an angle base plate transmission rod 36, an angle base plate handwheel 37 connected to the angle base plate transmission rod 36, and two linkage mechanisms respectively connected to the two angle base plates 31, and the two linkage mechanisms are synchronously transmitted and connected with the angle base plate transmission rod 36. When it is necessary to prefabricate and adjust the anti-deformation angle of the steel plate, the angle base plate transmission rod 36 can be driven by rotating the angle base plate handwheel 37, and then the two linkage mechanisms are driven to move synchronously through the angle base plate transmission rod 36, thereby synchronously driving and adjusting the two angle base plates 31, and the angle adjustment size of the two angle base plates 31 is consistent. The angle of the angle base plate 31 can be quickly adjusted by the angle base plate hand wheel 37, so that it is convenient to use it as a test tool to test the reasonable prefabricated anti-deformation angle of steel plates of different sizes during welding.

[0035] Specifically, Figure 6 and Figure 7 As shown, the linkage mechanism includes a connecting rod 33, a screw slide 34 and an angle base screw 35. One end of the connecting rod 33 is hinged to the angle base 31, and the other end is hinged to the screw slide 34. The screw slide 34 is transmission-connected to the angle base screw 35, and the angle base screw 35 is transmission-connected to the angle base transmission rod 36 through a bevel gear pair at the inner end.

[0036] Further, in a preferred embodiment of the present invention, Figure 8 and Figure 9 As shown, the pad adjustment device 2 includes a pad bracket 21, a pad 22 disposed on the pad bracket 21, and an up-and-down adjustment mechanism connected to the bottom of the pad bracket 21 to drive the pad bracket 21 to fine-tune in the vertical direction. Figure 9 As shown, the up-down adjustment mechanism includes a pad adjustment screw 23 rotatably connected to the base 1, a limiting sleeve 231 is provided in the middle section of the pad adjustment screw 23, and threaded sections 232 with opposite rotation directions are provided at both ends. The threaded sections 232 at both ends are sleeved with pad adjustment screw nuts 211 that can move closer or farther away from each other. When the pad adjustment screw 23 rotates clockwise, the pad adjustment screw nuts 211 at both ends move closer to each other, and when the pad adjustment screw 23 rotates counterclockwise, the pad adjustment screw nuts 211 at both ends move away from each other. Figure 9As shown, a ramp surface 2111 that is in surface contact with the end of the pad bracket 21 is formed at the upper end of the pad adjusting screw nut 211, and a ramp surface adapted to the ramp surface 2111 is formed at the end of the pad bracket 21. When the pad adjusting screw nuts 211 at both ends approach each other, under the guiding action of the ramp surface 2111, the pad bracket 21 is lifted by a vertical height by the relatively approaching pad adjusting screw nuts 211, realizing the upward adjustment of the pad bracket 21 in the vertical direction. When the pad adjusting screw nuts 211 at both ends move relatively away from each other, under the guiding action of the ramp surface 2111, the pad bracket 21 is lowered by a vertical height by the relatively moving-away pad adjusting screw nuts 211, realizing the downward adjustment of the pad bracket 21 in the vertical direction. Specifically, as Figure 9 shown, an outer end of the pad adjusting lead screw 23 is connected with a pad adjusting hand wheel 24. The rotation direction and angular displacement amount of the pad adjusting lead screw 23 can be adjusted through the pad adjusting hand wheel 24. When adjusting the vertical position of the pad bracket 21, the limiting sleeve 231 can limit the distance between the pad adjusting screw nuts 211 at both ends when they approach each other, avoiding the overrun misalignment of the ramp surface at the end of the pad bracket 21 from the ramp surface 2111 of the pad adjusting screw nut 211 and avoiding over-adjustment.

[0037] Furthermore, in an embodiment of the present invention, as Figure 8 and Figure 9 shown, weld bead gauge bases 25 are further provided at both ends of the pad 22, and weld bead gauges 251 are provided on the weld bead gauge bases 25. Among them, the weld bead gauge 251 is located on the center line of the pad 22. The weld bead gauge 251 on the center line of the pad 22 can ensure that two steel plates are aligned, and weld bead gauges 251 with different diameters can be selected according to different weld widths. The installation speed of the steel plates can be increased through the weld bead gauge 251, and it can ensure that two steel plates are aligned. The pad 22 can ensure the root penetration of the steel plate joint and the formation of the back of the weld. In an embodiment of the present invention, the weld bead gauge bases 25 are detachably arranged at both ends of the pad 22. As an exemplary illustration, positioning holes can be opened on the pad 22, and positioning posts adapted to the positioning holes are opened at the bottom of the weld bead gauge bases 25. The weld bead gauge bases 25 and the pad 22 are connected in a detachable manner, which can facilitate the removal of the weld bead gauge bases 25 before welding and also facilitate the replacement of weld bead gauges 251 with different diameters according to actual welding needs.

[0038] Furthermore, in an embodiment of the present invention, as Figure 10 and Figure 11As shown, the position limiting and pressing device 4 includes two brackets 41, sliders 42 respectively fixed to the inner sides of the two brackets 41, and a crossbeam 43 which is arranged between the two brackets 41 and can be adjusted up and down. The slider 42 can be horizontally slidably connected to the base 1. Specifically, the two ends of the crossbeam 43 are provided with position limiting arms 431 which can be slidably connected to the two brackets 41 up and down, and fixing nuts 411 are fixed to the brackets 41, wherein screws 44 are respectively connected between the two fixing nuts 411 and the two ends of the crossbeam 43. Specifically, as shown in FIG. Figure 12 As shown, the lower end of the screw rod 44 is threadedly connected to the fixing nut 411, and the upper end passes through the cross beam 43 through the rod hole on the cross beam 43. The upper end of the screw rod 44 is not threadedly connected to the cross beam 43 at the rod section passing through the cross beam 43, that is, the rod section at this location can maintain radial rotation relative to the rod hole of the cross beam 43, but the rotation between the two does not constitute a threaded rotation relationship. In the axial direction, the upper end of the screw rod 44 and the cross beam 43 form a fixed connection structure, that is, as the screw rod 44 rotates in different clockwise directions, it can drive the cross beam 43 to move up and down in the radial direction, that is, in the vertical direction to adjust the height of the cross beam 43. Specifically, as shown in FIG. Figure 12 As shown, the upper end of the screw rod 44 is fixed with a screw rod stopper 441 on one side of the upper surface of the beam 43, and a shaft retaining ring 442 is fixed on one side of the lower surface of the beam 43. The screw rod stopper 441 bears the upward movement force of the beam 43, and the shaft retaining ring 442 plays the role of fixing the screw rod 44 on the beam 43 and driving the beam 43 to move upward. The upper end of one of the screw rods 44 is connected with a beam up and down adjustment hand wheel 45, and one side of the upper surface of the beam 43 is connected with a beam lead screw 46, and the two ends of the beam lead screw 46 are respectively connected to the screw rod 44 at the corresponding end through a bevel gear pair. When the one of the screw rods 44 is rotated by the beam up and down adjustment hand wheel 45, the screw 44 drives the beam lead screw 46 to rotate through the bevel gear pair, and then drives the screw rod 44 at the other end to rotate through the bevel gear pair at the other end of the beam lead screw 46. The brackets 41 at both ends can be synchronously driven by the beam lead screw 46 to achieve stable up and down adjustment of the beam 43. In order to limit and fix the limit clamping device 4 in the horizontal direction, the base 1 is also provided with an anti-drop limit device for limiting the slider 42 in the horizontal direction.

[0039] In an embodiment of the present invention, Figure 2 and Figure 5As shown, a slide bed 11 is provided at both ends of the base 1, and a slider 42 is slidably engaged in the slide bed 11. The anti-slip limit device includes positioning pin holes 10 provided on the left and right sides of the slide bed 11 and positioning pins 5 inserted in the positioning pin holes 10. An arched support 14 is provided at the upper end of the slide bed 11 of the base 1, and a bracket 141 for overlapping the support arms at both ends of the welding pad bracket 21 is provided at the upper end of the support 14. Among them, two longitudinally parallel first support seats 12 are provided between the slide beds 11 at both ends of the base 1, and an assembly groove is formed between the two first support seats 12, and the welding pad bracket 21 can be movably assembled in the assembly groove. Specifically, a rotation groove 121 is also formed on the upper end surface of the first support seat 12, and the shaft-like rotating end 311 of the angle bottom plate 31 can be rotatably adapted in the rotation groove 121, and the rotating shafts at both ends of the shaft-like rotating end 311 are rotatably fixed on the support 14 through a pressure plate. The middle part of the first support seat 12 is disconnected and formed with a linkage mechanism assembly groove 122 . A second support seat 13 is transversely arranged below the linkage mechanism assembly groove 122 , and the angle base plate lead screw 35 is rotatably connected to the second support seat 13 .

[0040] When in use, pull out the positioning pin 5, slide the two limiting clamping devices 4 to the outside, then adjust the angle base plate 31 to the appropriate anti-deformation prefabrication angle through the angle base plate hand wheel 37, select the appropriate weld joint measuring column 251 and put it on the weld joint measuring column seat 25. Put two steel plates on the angle base plate 31 after the angle is prefabricated, and use the butt end of the steel plate to hold the weld joint measuring column 251. After the weld gap and the anti-deformation prefabrication angle are adjusted, slide the two limiting clamping devices 4 to the middle, insert the positioning pin 5 into the positioning pin holes 10 on the left and right sides of the slide bed 11, and clamp the limiting clamping devices 4. Then, adjust the crossbeam up and down adjustment hand wheel 45 on the limiting clamping device 4, and press the crossbeam 45 onto the steel plate. At this time, the steel plate is fixed. Then remove the weld joint measuring column 251 and the weld joint measuring column seat 25, and then adjust the welding pad 22 to a suitable position through the welding pad adjustment hand wheel 24 on the welding pad adjustment device 2. After completing the preparation work, welding can begin.

[0041] During the welding process, due to uneven heating of the steel plate, the shrinkage of the weld will cause angular deformation. At this time, the steel plate will be turned upward along the rotation axis of the angle bottom plate 31 as the rotation center under the restraint of the crossbeam 43 until the prefabricated reverse deformation is completely offset. At this time, the steel plate will be close to the bottom of the crossbeam 43. Since the bottom plane of the crossbeam 43 is parallel to the horizontal plane, the steel plate is rigidly fixed while avoiding further deformation, ensuring that the flatness of the steel plate after welding meets the use requirements. After the steel plate is completely cooled and the stress release deformation is completed, use the crossbeam up and down adjustment hand wheel 45 to lift the crossbeam 45, remove the positioning pin 5, and slide the two limit clamping devices 4 to the left and right ends of the slide bed 11 of the base 1 respectively. At this time, the steel plate can be removed to complete this welding operation.

[0042] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A butt welding fixture for plate components, characterized in that, it includes a base (1), a pad adjusting device (2), an anti-deformation prefabrication device (3) and two limit pressing devices (4) provided on the base (1). The two limit pressing devices (4) are symmetrically arranged on the left and right sides of the pad adjusting device (2). The anti-deformation prefabrication device (3) includes two angle base plates (31) symmetrically arranged on the left and right sides of the pad adjusting device (2). The inner ends of the two angle base plates (31) are respectively close to the left and right sides of the pad adjusting device (2) and are rotatably connected to the base (1). The two angle base plates (31) are connected to an angle driving device to synchronously adjust the angles of the two angle base plates (31) for prefabricating the anti-deformation angle of the steel plate. The two limit pressing devices (4) are respectively arranged above the corresponding angle base plates (31) on the corresponding side; The angle driving device includes an angle base plate transmission rod (36), an angle base plate handwheel (37) connected to the angle base plate transmission rod (36), and two linkage mechanisms respectively connected to the two angle base plates (31). The two linkage mechanisms are synchronously and transmission-connected to the angle base plate transmission rod (36); The linkage mechanism includes a connecting rod (33), a lead screw slider (34) and an angle base plate lead screw (35). One end of the connecting rod (33) is hinged to the angle base plate (31), and the other end is hinged to the lead screw slider (34). The lead screw slider (34) is transmission-connected to the angle base plate lead screw (35). The angle base plate lead screw (35) is transmission-connected to the angle base plate transmission rod (36) through a bevel gear pair at the inner end; The pad adjusting device (2) includes a pad bracket (21), a pad (22) provided on the pad bracket (21), and an up-and-down adjusting mechanism transmission-connected to the bottom of the pad bracket (21) to drive the pad bracket (21) to finely adjust in the vertical direction; The up-and-down adjusting mechanism includes a pad adjusting lead screw (23) rotatably connected to the base (1). A limit sleeve (231) is provided in the middle section of the pad adjusting lead screw (23), and thread sections (232) with opposite helix directions are provided at both ends. Pad adjusting nuts (211) that can approach each other or move away from each other are sleeved on the thread sections (232) at both ends. A ramp surface (2111) that is in surface contact with the end of the pad bracket (21) is formed at the upper end of the pad adjusting nut (211). The outer end of the pad adjusting lead screw (23) is connected to a pad adjusting handwheel (24).

2. The butt welding fixture for plate components according to claim 1, characterized in that, an axle-like rotating end (311) is formed at the inner end of the angle base plate (31). The rotating shafts at both ends of the axle-like rotating end (311) are rotatably connected to the base (1). A welding operation space (32) is provided between the axle-like rotating ends (311) of the two angle base plates (31). The pad adjusting device (2) is located in the welding operation space (32).

3. The plate butt welding jig according to claim 1, It is characterized in that Two ends of the welding pad (22) are provided with weld joint measuring column seats (25), the weld joint measuring column seats (25) are provided with weld joint measuring columns (251), and the weld joint measuring columns (251) are located on the center line of the welding pad (22).

4. The plate butt welding jig according to claim 1, It is characterized in that The position limiting and pressing device (4) comprises two brackets (41), sliders (42) respectively fixed to the inner sides of the two brackets (41), and a crossbeam (43) arranged between the two brackets (41) so as to be adjustable in up and down direction. The slider (42) is horizontally slidably connected to the base (1).

5. The plate butt welding jig according to claim 4, It is characterized in that The two ends of the cross beam (43) are provided with position-limiting arms (431) which are slidably connected to the two brackets (41) up and down. The bracket (41) is provided with a fixing nut (411). Screw rods (44) are respectively connected between the two fixing nuts (411) and the two ends of the cross beam (43). The lower end of the screw rod (44) is threadedly connected to the fixing nut (411), and the upper end passes through the cross beam (43). The upper end of the screw rod (44) is fixed with a screw position-limiting stop (441) on one side located on the upper surface of the cross beam (43), and a shaft retaining ring (442) is fixed on one side located on the lower surface of the cross beam (43). The upper end of one of the screw rods (44) is connected with a cross beam up and down adjustment hand wheel (45), and the upper surface of the cross beam (43) is connected with a cross beam lead screw (46). The two ends of the cross beam lead screw (46) are respectively connected to the screw rod (44) at the corresponding end through a bevel gear pair.

6. The plate butt welding jig according to claim 4, It is characterized in that The base (1) is also provided with an anti-dropping limiting device for limiting the sliding block (42) in the horizontal direction.

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