Pneumatic welding clamp and box body clamping method

Abstract

The invention discloses a pneumatic welding clamp and a clamping method of a box body, the pneumatic welding clamp is used for welding the box body, the box body comprises a U-shaped plate, a left side plate and a right side plate, the U-shaped plate is arranged between the left side plate and the right side plate, the clamp comprises a rack, a supporting table, a restraining piece and a mounting plate, the supporting table is arranged on the rack and comprises a first section and a second section, and the first section is arranged on the supporting table; a supporting plate is arranged on the second section in a sliding manner; the first section and the supporting plate are each provided with a restraining piece, and the restraining pieces are used for installing the U-shaped plate, the left side plate and the right side plate. The installation plate is arranged on the pushing air cylinder on the first section, the thrust air cylinder is installed on the installation plate, the push plate is connected to an output shaft of the thrust air cylinder, the thrust air cylinder is used for driving the push plate to make contact with the rear end of the U-shaped plate, and the two arranged restraining pieces get close to or get away from each other in a relative sliding mode so as to adapt to the U-shaped plates of different sizes and specifications. Therefore, the trouble of manual handheld splicing is avoided, and the subsequent welding process is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of welding fixtures, and in particular to a pneumatic welding fixture and a box clamping method. Background Art

[0002] Some electrical appliance boxes include a left side plate, a right side plate and a U-shaped plate. When making the box, the left side plate, the right side plate and the U-shaped plate need to be welded together, such as the outer shell box of a coffee machine.

[0003] In the past, when welding this type of box, the left side panel, right side panel and U-shaped panel were often manually spliced ​​together. Manual hand-held splicing was difficult to operate, and the left side panel, right side panel and U-shaped panel could not be completely aligned, resulting in poor quality of subsequent welding. In addition, during the manual hand-held splicing process, each person's standards were different, resulting in a large error range in the size of the product after welding, uneven product quality, and inconvenient production. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a pneumatic welding fixture that can match and fix the left side plate, the right side plate and the U-shaped plate to ensure the quality of subsequent welding.

[0005] The invention also provides a box clamping method.

[0006] A pneumatic welding fixture according to an embodiment of the first aspect of the present invention is used for welding a box body, the box body includes a U-shaped plate, a left plate and a right side plate, the U-shaped plate is arranged between the left plate and the right side plate, and the fixture includes a frame, a support platform, a constraint and a mounting plate: the support platform is arranged on the frame, the support platform includes a first section and a second section, and the second section is slidably provided with a support plate; the first section and the support plate are both provided with the constraint member, the constraint member includes a vertical plate group, a contour support plate, a clamping cylinder, a pressing arm and a pushing cylinder, the first section and the support plate are both connected to the vertical plate group, the vertical plate group includes two vertical plates, the two vertical plates are arranged opposite to each other in the left and right directions, the contour support plate is arranged one-to-one with the vertical plate group, the contour support plate is bridged between the two vertical plates, the two contour support plates are used to cooperate with the support U-shaped plate, the clamping cylinder is arranged one-to-one with the vertical plates, and the clamping cylinder is connected to the corresponding vertical plates. The upper end of the plate group, the main shaft of the pressing cylinder is extended upward, the pressing arm is arranged in a one-to-one correspondence with the pressing cylinder, the pressing arm is connected to the main shaft of the corresponding pressing cylinder, the pressing arm is arranged in an L shape, the horizontal section of the pressing arm is provided with a first pressing piece, the vertical section of the pressing arm is provided with a second pressing piece, the second pressing piece and the inner side surface of the corresponding vertical plate define a clamping gap, the clamping gap is used to clamp the left side plate or the right side plate of the box body, the second pressing piece is used to cooperate with the first pressing piece to clamp the left side plate or the right side plate of the box body, the first section and the support plate are both connected to the pushing cylinder, the main shaft of the pushing cylinder is connected to a limiting plate, and the limiting plate is used to block the front end surface or the rear end surface of the box body; the mounting plate is arranged on the pushing cylinder on the first section, and a thrust cylinder is installed on the mounting plate, and a push plate is connected to the output shaft of the thrust cylinder, and the thrust cylinder is used to drive the push plate to contact the rear end of the U-shaped plate.

[0007] A pneumatic welding fixture according to an embodiment of the present invention has at least the following beneficial effects: the two restraining members are arranged to move closer or farther away by relative sliding, so as to adapt to the U-shaped plates of different sizes, and cooperate with the vertical plate, the clamping cylinder, the pressure arm and the push cylinder to lock the U-shaped plate, the left plate and the right plate together, so as to complete the preliminary splicing of the box body, eliminate the trouble of manual hand-held splicing, and facilitate the subsequent welding process; the specific structure of the restraining members is simple, easy to install and use, and the two restraining members cooperate to clamp the box body, so as to achieve a special adaptable installation of the box body, which is convenient for subsequent welding; the pressure arm is arranged to cooperate with the clamping cylinder to realize the locking of the left plate and the right plate in two directions, ensure the clamping stability, and facilitate human operation.

[0008] According to some embodiments of the present invention, the second section is integrally formed with the first section, the second section is configured as a sunken step portion, a limiting track is provided on the second section, the support plate is slidably provided in the limiting track, and the upper end surface of the support plate is flush with the upper end surface of the first section, so that the support platform can be disassembled and assembled as a whole, and the restraint on the support platform can be disassembled and assembled along with the restraint as a whole, thereby realizing modular assembly and easy installation.

[0009] According to some embodiments of the present invention, the support plate is provided with a plurality of waist-shaped hole groups distributed along the front-to-back direction, each waist-shaped hole group includes two waist-shaped holes arranged opposite to each other in the left-to-right direction, and the second section is provided with a plurality of connecting holes distributed along the front-to-back direction, the waist-shaped holes are used to pass locking bolts, and the locking bolts are used to threadably connect the corresponding connecting holes, and the waist-shaped hole groups are provided so that the support plate can be adjusted, and after adjustment, it can be locked by the locking bolts.

[0010] According to some embodiments of the present invention, the vertical plate is connected to the corresponding first section or the support plate via ribs, and the ribs are provided to increase the connection stability and connection strength of the vertical plate.

[0011] According to some embodiments of the present invention, the first pressing member includes an adjusting screw and an elastic pressing block, the adjusting screw and the thread are connected to the horizontal section of the pressing arm, the axis of the adjusting screw extends downward, and the elastic pressing block is connected to the lower end of the adjusting screw. The adjusting screw has a simple structure and is easy to operate and adjust.

[0012] According to some embodiments of the present invention, the contoured support plate is provided with an arc contact portion, which is used to contact and support the rounded corners of the U-shaped plate. The provision of the arc contact portion increases the contact area with the U-shaped plate and provides more stable support.

[0013] According to some embodiments of the present invention, the second pressing member includes a pressure cylinder, which is connected to the vertical section of the pressing arm. The main axis of the pressure cylinder faces the corresponding vertical plate. The main axis of the pressure cylinder is used to press the left side plate or the right side plate of the box body. The second pressing member and the adjusting screw are used to lock the left side plate and the right side plate in two directions to ensure that the left side plate and the right side plate are clamped stably.

[0014] According to some embodiments of the present invention, the vertical section of the pressure arm is provided with a mounting hole, and the pressure cylinder is threadedly connected to the mounting hole. The connection method of the pressure cylinder is simple and quick, and is easy to install.

[0015] According to some embodiments of the present invention, the support platform is detachably connected to the frame.

[0016] A box clamping method according to a second aspect of an embodiment of the present invention uses the pneumatic welding fixture, and includes the following steps:

[0017] S1, adjusting, adjusting the support plate so that the restraining member on the support plate moves with it, thereby adjusting the distance between the two restraining members;

[0018] S2, installing the U-shaped plate, placing the U-shaped plate on two adjacent contoured pallets, and clamping the U-shaped plate with the vertical plates;

[0019] S3, installing the left side panel and the right side panel, placing the left side panel and the right side panel on the U-shaped panel, the left side panel and the right side panel are spaced apart in the left-right direction, and the left side panel and the right side panel are installed in accordance with the shape of the U-shaped panel;

[0020] S4, clamping, driving the pushing cylinder to move toward the left plate and the right plate until the limit plate abuts against the ends of the left plate and the right plate, and then driving the pressing cylinder to descend, the descent of the pressing cylinder drives the pressing arm to descend, the first pressing piece on the pressing arm is used to press the top ends of the corresponding left plate and the right plate, adjust the second pressing piece so that the second pressing piece presses the inner side surfaces of the corresponding left plate and the right plate, and completes the fixation of the U-shaped plate, the left plate and the right plate.

[0021] A box clamping method according to an embodiment of the present invention has at least the following beneficial effects: the box is clamped by a clamp, which eliminates the trouble of manual hand-held assembly and welding, and increases the product yield; the two restraining members are arranged to move closer or farther away by relative sliding, so as to adapt to the U-shaped plates of different sizes; the vertical plate, the clamping cylinder, the pressure arm and the push cylinder are used to lock the U-shaped plate, the left plate and the right plate together to complete the preliminary splicing of the box, which eliminates the trouble of manual hand-held splicing and facilitates the subsequent welding process; the specific structure of the restraining member is simple to set, which is convenient for installation and use; the two restraining members cooperate to clamp the box, so as to achieve a special adaptable installation of the box, which is convenient for subsequent welding; the pressure arm cooperates with the clamping cylinder to realize the locking of the left plate and the right plate in two directions, so as to ensure the stability of clamping.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 A schematic diagram of the structure of a pneumatic welding fixture according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 An exploded view of a pneumatic welding fixture is shown;

[0026] Figure 3 for Figure 1 A rear view of the pneumatic welding fixture is shown;

[0027] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0028] Frame 100, support platform 200, first section 210;

[0029] The second section 220, the limiting track 221, and the connecting hole 222;

[0030] Support plate 230, waist-shaped hole group 231, waist-shaped hole 232;

[0031] Constraint 300, vertical plate group 310, vertical plate 311, rib plate 312;

[0032] A contoured support plate 320, an arc contact portion 321, and a pressing cylinder 330;

[0033] A pressing arm 340, a first pressing member 341, an adjusting screw 341a, and an elastic pressing block 341b;

[0034] The second pressing member 342, the mounting hole 343, the ejection cylinder 350, and the limiting plate 360;

[0035] Mounting plate 400, thrust cylinder 410, push plate 411;

[0036] Box body 500 , U-shaped plate 510 , left side plate 520 , and right side plate 530 . DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] Reference Figures 1 to 4According to a first embodiment of the present invention, a pneumatic welding fixture is used for welding a box body 500, the box body 500 includes a U-shaped plate 510, a left side plate 520 and a right side plate 530, the U-shaped plate 510 is arranged between the left side plate 520 and the right side plate 530, the fixture includes a frame 100, a support table 200, a constraint 300 and a mounting plate 400: the support table 200 is arranged on the frame 100, the support table 200 includes a first section 210 and a second section 220, and the second section 220 is slidably provided with a support plate 230; the first section 210 and the support plate 230 are both provided with a constraint The constraint member 300 includes a vertical plate group 310, a contoured support plate 320, a clamping cylinder 330, a pressing arm 340 and a push cylinder 350. The first section 210 and the support plate 230 are both connected with the vertical plate group 310. The vertical plate group 310 includes two vertical plates 311, and the two vertical plates 311 are arranged opposite to each other in the left and right directions. The contoured support plate 320 is arranged one-to-one with the vertical plate group 310. The contoured support plate 320 is bridged between the two vertical plates 311. The two contoured support plates 320 are used to cooperate with the support U-shaped plate 510. The clamping cylinder 330 is arranged one-to-one with the vertical plates 311. The clamping cylinder The upper end of the corresponding vertical plate group 310 is connected to the main shaft of the pressing cylinder 330, and the pressing arm 340 is arranged in a one-to-one correspondence with the pressing cylinder 330. The pressing arm 340 is connected to the main shaft of the corresponding pressing cylinder 330. The pressing arm 340 is arranged in an L shape. A first pressing piece 341 is arranged on the horizontal section of the pressing arm 340, and a second pressing piece 342 is arranged on the vertical section of the pressing arm 340. The second pressing piece 342 and the inner side surface of the corresponding vertical plate 311 define a clamping gap, and the clamping gap is used to clamp the left side plate 520 or the right side plate 530 of the box body 500. The second pressing piece 342 is used to clamp the left side plate 520 or the right side plate 530 of the box body 500. In cooperation with the first pressure piece 341, the left plate 520 or the right plate 530 of the box body 500 is pressed. The first section 210 and the support plate 230 are both connected with a push cylinder 350. The main shaft of the push cylinder 350 is connected with a limit plate 360. The limit plate 360 ​​is used to block the front end face or the rear end face of the box body 500. The mounting plate 400 is arranged on the push cylinder 350 on the first section 210. The mounting plate 400 is installed with a thrust cylinder 410. The output shaft of the thrust cylinder 410 is connected with a push plate 411. The thrust cylinder 410 is used to drive the push plate 411 to contact the rear end of the U-shaped plate 510.

[0042] It should be understood that the two restraining members 300 are arranged to move closer or farther away by relative sliding, so as to adapt to U-shaped plates 510 of different sizes and specifications, and cooperate with the vertical plate 311, the clamping cylinder 330, the pressing arm 340 and the pushing cylinder 350 to lock the U-shaped plate 510, the left side plate 520 and the right side plate 530 together, completing the preliminary splicing of the box body, eliminating the trouble of manual hand-held splicing, and facilitating the subsequent welding process; the specific structure of the restraining member 300 is simple, easy to install and use, and the two restraining members 300 cooperate to clamp the box body 500, achieving a special adaptability installation for the box body 500, which is convenient for subsequent welding; the set pressing arm 340 cooperates with the clamping cylinder 330 to realize the locking of the left side plate 520 and the right side plate 530 in two directions, thereby ensuring the stability of clamping.

[0043] It should be noted that the box body 500 is the box body of the coffee water tank, which does not have only three parts, namely the U-shaped plate 510, the left side plate 520 and the right side plate 530. The present invention is aimed at welding these three parts of the water tank. Because after the three parts of the water tank are welded into a whole, other panels can be directly placed on this whole for welding. It is mainly during the welding process of the U-shaped plate 510, the left side plate 520 and the right side plate 530 that manual holding is prone to huge errors.

[0044] The so-called restraint 300 actually requires two to work together. A single restraint 300 cannot solve the problem. The contoured support plates 320 on the two restraints 300 need to cooperate with the supporting U-shaped plate 510, and the restraint 300 is also structurally installed in conjunction with the support platform 200 and the support plate 230. The restraint 300 on it can be adjusted by adjusting the support plate 230.

[0045] In some embodiments, the second section 220 is integrally formed with the first section 210, and the second section 220 is configured as a sunken step portion. A limiting track 221 is provided on the second section 220, and the support plate 230 is slidably provided in the limiting track 221. The upper end surface of the support plate 230 is flush with the upper end surface of the first section 210, so that the support platform 200 can be disassembled and assembled as a whole, and the restraint member 300 on the support platform 200 can be disassembled and assembled as a whole along with the restraint member 300, thereby realizing modular assembly and convenient installation.

[0046] In some embodiments, the support plate 230 is provided with a plurality of waist-shaped hole groups 231 distributed along the front-to-back direction, and each waist-shaped hole group 231 includes two waist-shaped holes 232 arranged opposite to each other in the left-to-right direction. The second section 220 is provided with a plurality of connecting holes 222 distributed along the front-to-back direction. The waist-shaped holes 232 are used to pass through locking bolts, and the locking bolts are used to threadedly connect to the corresponding connecting holes 222. The waist-shaped hole groups 231 are provided so that the support plate 230 can be adjusted, and after adjustment, it can be locked by the locking bolts. It can be understood that the waist-shaped holes 232 and the connecting holes 222 are cooperated, and large adjustments can be achieved by changing the connecting holes 222, and fine adjustments can be achieved by the waist-shaped holes 232. In the process of fine-tuning using the waist-shaped holes 232, fine-tuning and locking can be performed after loading the U-shaped plate 510, the left plate 520 and the right plate 530, so as to achieve better positioning and ensure the stability of positioning.

[0047] Reference Figure 2 The vertical plate 311 is connected to the corresponding first section 210 or the support plate 230 through the ribs 312 , and the ribs 312 increase the connection stability and connection strength of the vertical plate 311 .

[0048] In some embodiments, the first pressing member 341 includes an adjusting screw 341a and an elastic pressing block 341b, the adjusting screw 341a is threadedly connected to the horizontal section of the pressing arm 340, the axis of the adjusting screw 341a extends downward, the elastic pressing block 341b is connected to the lower end of the adjusting screw 341a, and the adjusting screw 341a has a simple structure and is easy to operate and adjust. It is understandable that the elastic pressing block 341b includes a rubber block, a foam block or a plastic block. It should be noted that the elastic pressing block 341b includes a rubber block, a plastic block or a foam block, etc.

[0049] It should be noted that the contoured support plate 320 is provided with an arc contact portion 321, which is used to contact and support the rounded corner of the U-shaped plate 510. The arc contact portion 321 increases the contact area with the U-shaped plate 510 and provides more stable support. The contoured support plate 320 is also detachably connected to the vertical plate by screws. The so-called detachability includes threaded connections such as screws. The contoured support plate 320 can be rotated to adapt to rounded corners at different positions, and the contoured support plate 320 can also be moved vertically on the vertical plate to adapt to rounded corners at different heights. Specifically, the contoured support plate 320 is locked on the vertical plate by two screws. By removing one of the screws, the contoured support plate 320 can be rotated and adjusted, and the other screw needs to be connected to the arc groove on the vertical plate and locked by a nut. A plurality of groups of such hole combinations distributed vertically are provided on the vertical plate, so that the contoured support plate 320 can be adjusted vertically.

[0050] Reference Figure 1 and Figure 3The second pressing piece 342 includes a pressure cylinder, which is connected to the vertical section of the pressing arm 340. The main axis of the pressure cylinder faces the corresponding vertical plate 311. The main axis of the pressure cylinder is used to press the left side plate 520 or the right side plate 530 of the box body 500. The second pressing piece 342 and the adjusting screw 341a are used to lock the left side plate 520 and the right side plate 530 in two directions to ensure that the left side plate 520 and the right side plate 530 are clamped stably.

[0051] In some embodiments, the vertical section of the pressure arm 340 is provided with a mounting hole 343, and the pressure cylinder is threadedly connected to the mounting hole 343. The connection method of the pressure cylinder is simple and fast, and is easy to install.

[0052] In some embodiments, the support platform 200 is detachably connected to the frame 100 .

[0053] A box clamping method according to a second aspect of an embodiment of the present invention uses a pneumatic welding fixture, comprising the following steps:

[0054] S1, adjust, adjust the support plate 230 so that the restraining member 300 on the support plate 230 moves accordingly, thereby adjusting the distance between the two restraining members 300;

[0055] S2, installing the U-shaped plate 510, placing the U-shaped plate 510 on two adjacent contoured support plates 320, and clamping the U-shaped plate 510 with the vertical plate 311;

[0056] S3, installing the left side plate 520 and the right side plate 530, placing the left side plate 520 and the right side plate 530 on the U-shaped plate 510, the left side plate 520 and the right side plate 530 are spaced apart in the left and right directions, and the left side plate 520 and the right side plate 530 are installed in accordance with the shape of the U-shaped plate 510;

[0057] S4, clamping, drive the pushing cylinder 350 to move toward the left plate 520 and the right plate 530 until the limit plate 360 ​​abuts against the ends of the left plate 520 and the right plate 530, and then drive the clamping cylinder 330 to descend, and the descent of the clamping cylinder 330 drives the pressing arm 340 to descend, and the first pressing piece 341 on the pressing arm 340 is used to press the top of the corresponding left plate 520 and the right plate 530, adjust the second pressing piece 342 so that the second pressing piece 342 presses the inner side of the corresponding left plate 520 and the right plate 530, and completes the fixation of the U-shaped plate 510, the left plate 520 and the right plate 530.

[0058] The box body 500 is clamped by a clamp, which eliminates the trouble of manual hand-held assembly and welding, and increases the product yield. The two restraining members 300 are arranged to move closer or farther away by relative sliding, so as to adapt to the U-shaped plate 510 of different sizes and specifications. The vertical plate 311, the clamping cylinder 330, the pressing arm 340 and the pushing cylinder 350 are used to lock the U-shaped plate 510, the left side plate 520 and the right side plate 530 together to complete the preliminary splicing of the box body, eliminating the trouble of manual hand-held splicing and facilitating the subsequent welding process; the specific structure of the restraining member 300 is simple and easy to install and use. The two restraining members 300 cooperate to clamp the box body 500, achieve a special adaptability installation for the box body 500, and facilitate subsequent welding; the set pressing arm 340 cooperates with the clamping cylinder 330 to realize the locking of the left side plate 520 and the right side plate 530 in two directions, and ensure the stability of clamping.

[0059] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A pneumatic welding fixture, characterized in that: Used for welding a box body (500), the box body (500) comprises a U-shaped plate (510), a left side plate (520) and a right side plate (530), the U-shaped plate (510) is arranged between the left side plate (520) and the right side plate (530), and the clamp comprises: Rack(100); A support platform (200) is arranged on the frame (100), the support platform (200) comprises a first section (210) and a second section (220), and a support plate (230) is slidably arranged on the second section (220); The first section (210) and the support plate (230) are both provided with the constraint member (300), the constraint member (300) comprises a vertical plate group (310), a contoured support plate (320), a pressing cylinder (330), a pressing arm (340) and a pushing cylinder (350), the first section (210) and the support plate (230) are both connected with the vertical plate group (310), the vertical plate group (310) comprises two vertical plates (311), the two vertical plates (311) ) are arranged opposite to each other in the left and right directions, the profiling support plate (320) is arranged one-to-one with the vertical plate group (310), the profiling support plate (320) is bridged between the two vertical plates (311), the two profiling support plates (320) are used to cooperate with the support U-shaped plate (510), the pressing cylinder (330) is arranged one-to-one with the vertical plate (311), the pressing cylinder (330) is connected to the upper end of the corresponding vertical plate group (310), and the main axis of the pressing cylinder (330) is extended upward. The pressing arm (340) is arranged in a one-to-one correspondence with the pressing cylinder (330), the pressing arm (340) is connected to the main shaft of the corresponding pressing cylinder (330), the pressing arm (340) is arranged in an L shape, a first pressing piece (341) is arranged on the horizontal section of the pressing arm (340), and a second pressing piece (342) is arranged on the vertical section of the pressing arm (340), and the second pressing piece (342) and the inner side surface of the corresponding vertical plate (311) define a clamping gap, and the clamping gap is used for clamping The left side plate (520) or the right side plate (530) of the box body (500), the second pressing piece (342) is used to cooperate with the first pressing piece (341) to press the left side plate (520) or the right side plate (530) of the box body (500), the first section (210) and the support plate (230) are both connected to the ejection cylinder (350), the main shaft of the ejection cylinder (350) is connected to a limit plate (360), and the limit plate (360) is used to block the front end face or the rear end face of the box body (500); The mounting plate (400) is arranged on the push cylinder (350) on the first section (210), and a thrust cylinder (410) is installed on the mounting plate (400). A push plate (411) is connected to the output shaft of the thrust cylinder (410), and the thrust cylinder (410) is used to drive the push plate (411) to contact the rear end of the U-shaped plate (510).

2. The pneumatic welding fixture according to claim 1, characterized in that: The second section (220) is integrally formed with the first section (210); the second section (220) is configured as a sunken step portion; a limiting track (221) is provided on the second section (220); the support plate (230) is slidably disposed in the limiting track (221); and the upper end surface of the support plate (230) is flush with the upper end surface of the first section (210).

3. The pneumatic welding fixture according to claim 1, characterized in that: The support plate (230) is provided with a plurality of waist-shaped hole groups (231) distributed along the front-to-back direction, each waist-shaped hole group (231) includes two waist-shaped holes (232) arranged opposite to each other in the left-right direction, and the second section (220) is provided with a plurality of connection holes (222) distributed along the front-to-back direction, the waist-shaped holes (232) are used to pass locking bolts, and the locking bolts are used to be threadedly connected to the corresponding connection holes (222).

4. The pneumatic welding fixture according to claim 1, characterized in that: The vertical plate (311) is connected to the corresponding first section (210) or the supporting plate (230) via a rib plate (312).

5. The pneumatic welding fixture according to any one of claims 1 to 4, characterized in that: The first pressing member (341) includes an adjusting screw (341a) and an elastic pressing block (341b), wherein the adjusting screw (341a) is threadedly connected to a horizontal section of the pressing arm (340), an axis of the adjusting screw (341a) extends downward, and the elastic pressing block (341b) is connected to the lower end of the adjusting screw (341a).

6. The pneumatic welding fixture according to claim 5, characterized in that: The contoured support plate (320) is provided with an arc contact portion (321), and the arc contact portion (321) is used to contact and support the rounded corner portion of the U-shaped plate (510).

7. The pneumatic welding fixture according to claim 6, characterized in that: The second pressing member (342) includes a pressure cylinder, which is connected to the vertical section of the pressing arm (340), and the main axis of the pressure cylinder is oriented toward the corresponding vertical plate (311). The main axis of the pressure cylinder is used to press the left plate (520) or the right plate (530) of the box body (500).

8. The pneumatic welding fixture according to claim 1, characterized in that: The vertical section of the pressure arm (340) is provided with a mounting hole (343), and the pressure cylinder is threadedly connected to the mounting hole (343).

9. The pneumatic welding fixture according to claim 1, characterized in that: The support platform (200) is detachably connected to the frame (100).

10. A box clamping method, characterized in that: The pneumatic welding fixture according to claim 1 is applied, comprising the following steps: S1, adjusting the support plate (230) so that the restraining member (300) on the support plate (230) moves accordingly, thereby adjusting the distance between the two restraining members (300); S2, placing the U-shaped plate (510) on two adjacent contoured support plates (320), and clamping the U-shaped plate (510) with the vertical plates (311); S3, placing the left side plate (520) and the right side plate (530) on the U-shaped plate (510), wherein the left side plate (520) and the right side plate (530) are spaced apart in the left-right direction, and the left side plate (520) and the right side plate (530) are installed in accordance with the shape of the U-shaped plate (510); S4, drive the pushing cylinder (350) to move toward the left plate (520) and the right plate (530) until the limit plate (360) abuts against the ends of the left plate (520) and the right plate (530), and then drive the clamping cylinder (330) to descend. The descent of the clamping cylinder (330) drives the pressing arm (340) to descend. The first pressing piece (341) on the pressing arm (340) is used to press the top ends of the corresponding left plate (520) and the right plate (530). Adjust the second pressing piece (342) so that the second pressing piece (342) presses the inner side surfaces of the corresponding left plate (520) and the right plate (530), thereby completing the fixation of the U-shaped plate (510), the left plate (520) and the right plate (530).

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