Welding machining method for pentagonal lower side beam of railway vehicle

Abstract

The invention relates to the technical field of railway vehicle welding, in particular to a railway vehicle pentagonal lower side beam welding machining method which comprises an equipment box, an inner supporting correcting mechanism, an outer pressing correcting mechanism and an abutting and supporting mechanism. According to the welding machining equipment for the pentagonal lower side beam of the railway vehicle, by means of the mode that the inner supporting correcting mechanism and the outer pressing correcting mechanism are matched, deformation caused by springback external expansion and excessive bending inward concave after the lower side beam is bent and formed is corrected and shaped, so that the two ends of the welding position of the lower side beam can be accurately aligned, and the welding quality of the pentagonal lower side beam is improved. The situation that the welding quality and the bearing capacity of the welded lower side beam are affected due to the fact that a gap of the lower side beam is large or the two ends of the welding position deviate is avoided, the correction welding driving source is adopted for driving the inner supporting correction mechanism and the outer pressing correction mechanism to move synchronously, the function of welding while correcting and shaping is achieved, the corrected lower side beam is rapidly welded, and the welding efficiency is improved. And the welding quality of the lower side beam is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of rail vehicle welding, and specifically proposes a welding processing method for a pentagonal lower side beam of a rail vehicle. Background Art

[0002] The cross-section of the lower side beam of a rail vehicle is pentagonal, which can provide good bending and torsion resistance. It is an important component of the vehicle body frame and a key component of the frame structure. It is mainly used to support and transfer loads to ensure the stability and strength of the vehicle body structure.

[0003] After the pentagonal lower side beam of the rail vehicle is bent into shape, it needs to be welded to make its cross section into a closed pentagonal shape, thereby providing the vehicle body with good bending and torsional resistance and supporting the vehicle body load and external load.

[0004] However, after the pentagonal lower beam of the rail vehicle is bent, it is easy to rebound and expand outward or bend excessively and become partially concave, which leads to the enlargement of the gap at the weld required for the lower beam and the inability to accurately align the two sides of the weld of the lower beam. If directly welded, it is easy to cause poor welding quality, affecting the bearing capacity of the pentagonal lower beam of the rail vehicle after welding. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides a welding processing method for a pentagonal lower side beam of a rail vehicle, which is completed in cooperation with a welding processing equipment for a pentagonal lower side beam of a rail vehicle to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present application provides the following technical solutions: a welding processing method for a pentagonal lower side beam of a rail vehicle, which is completed using a welding processing equipment for a pentagonal lower side beam of a rail vehicle, the welding processing equipment including an equipment box, one side of the equipment box arranged along its length direction is installed with a rail, a support tube and a U-shaped base arranged in sequence from top to bottom.

[0007] An internal support correction mechanism for correcting the inner wall of the lower beam is installed on the support tube, and an external pressure correction mechanism for correcting the outer wall of the lower beam is slidably connected to the track; a correction welding drive source for driving the external pressure correction mechanism and the internal support correction mechanism to move synchronously is installed on the equipment box, and a fixing support mechanism for fixing the lower beam and supporting the suspended end of the support tube is installed on the U-shaped base.

[0008] The inner support correction mechanism comprises a connecting plate slidably connected to the supporting tube, an inner support frame having the same shape as the lower beam is fixedly sleeved on the connecting plate, and a side of the inner support frame away from the equipment box is arc-shaped.

[0009] In a possible implementation, the outer side wall of the inner support frame is provided with mounting grooves evenly arranged along its length direction, and the five end surfaces of the mounting grooves are rotatably connected to the second anti-friction roller.

[0010] The external pressure correction mechanism includes a fixed frame installed on the track and sliding along the length direction thereof and four correction pressure plates. The fixed frame is in an inverted shape. The four correction pressure plates are used for pressing and correcting the remaining four end faces except the lower end face of the lower beam. A plurality of anti-friction rollers are installed on the end face of the correction pressure plate that is rotatable away from the fixed frame. A pressure driving group for driving the four correction pressure plates is installed on the fixed frame. A welding machine is installed on the side of the horizontal section of the fixed frame close to the equipment box.

[0011] In one possible implementation, the pressure driving group includes an elastic connecting member installed on the opposite surfaces of the two vertical sections of the fixed frame, wherein the two correction pressure plates are respectively connected to the two vertical sections of the fixed frame through the elastic connecting members, and the horizontal section of the fixed frame is installed with two fixed cylinders symmetrically arranged along its length direction, and the fixed cylinder is plugged with a connecting rod that slides through the fixed frame, and an inverted L-shaped frame is installed at the lower end of the connecting rod. The end of the horizontal section of the inverted L-shaped frame is connected to the corresponding correction pressure plate located on the upper side, and a wedge-shaped resistance block is installed at the other end of the inverted L-shaped frame, and a wedge block matching the wedge-shaped resistance block is installed on the vertical correction pressure plate, and a hydraulic driving member (not shown in the figure) that drives the two connecting rods to move up and down is installed on the fixed frame.

[0012] In one possible implementation, the elastic connecting member includes a storage cylinder installed on the vertical section of the fixed frame, and a guide rod fixedly connected to the corresponding correction pressure plate is slidably connected to the storage cylinder, and a push spring is also installed between the storage cylinder and the corresponding correction pressure plate.

[0013] In one possible implementation, the supporting mechanism includes a C-shaped blocking bar, an end abutment group, and a supporting locking group installed on the C-shaped base and arranged in sequence along its length direction. The C-shaped blocking bar is installed on the side of the C-shaped base close to the equipment box, the end abutment group is used to limit the end of the lower beam away from the equipment box, and the supporting locking group is used to drive the end abutment group to limit the lower beam and support the suspended end of the support tube.

[0014] In a possible implementation, the end abutment group includes a fixing seat installed on the top of the vertical section of the U-shaped base, and a T-shaped baffle is slidably inserted on the fixing seat, and the T-shaped baffle slides through the fixing seat.

[0015] In one possible implementation, the supporting locking group includes a supporting frame installed between the track and the U-shaped base, two L-shaped hook plates are slidably connected to the supporting frame, an expansion disk is installed at the end of the supporting tube, and the side wall of the expansion disk is provided with two symmetrically arranged slots, one of the horizontal sections of the L-shaped hook plate is plugged into the corresponding slot, the other horizontal section of the L-shaped hook plate is connected to the T-shaped baffle, and a reset spring is installed between the fixed seat and the L-shaped hook plate, and a socket extending up and down is provided at one end of the L-shaped hook plate inserted into the slot, and a latch member is installed on the expansion disk for plugging into the socket to lock the L-shaped hook plate.

[0016] In one possible implementation, the latch member includes a spring groove opened at the top of the side wall of the expansion disk, and a lower plug-in is slidably inserted in the spring groove. The lower plug-in is in an inverted shape, and two vertical sections of the lower plug-in slide through the corresponding slots and then plug into the jack, and a push spring is installed between the lower plug-in and the spring groove.

[0017] In one possible implementation, the correction welding drive source includes a hydraulic cylinder and a connecting frame. The hydraulic cylinder is installed in an equipment box. The telescopic end of the hydraulic cylinder is connected to the connecting frame. The connecting frame is in a "J" shape. The hydraulic cylinder is located in the connecting frame. The equipment box is provided with storage grooves for accommodating the connecting frame that are symmetrically arranged up and down. A push rod is installed between one end of the connecting frame located on the upper side and the fixed frame. A push rod inserted into the support tube is installed at the other end of the connecting frame. The push rod is connected to the connecting plate through a push connector.

[0018] In one possible implementation, the push connector includes a fixed plate installed at one end of the push rod away from the connecting frame, three connecting legs evenly arranged along the circumference of the fixed plate are installed between the fixed plate and the connecting plate, and the side wall of the support tube is provided with a guide groove corresponding to the connecting legs one by one and slidingly cooperating with the connecting legs.

[0019] In a possible implementation, the fixing frame and the C-shaped base are slidably connected via a guide connection group. The guide connection group includes an inverted T-shaped groove formed at the top of two vertical sections of the C-shaped base, and an inverted T-shaped sliding column slidably matched with the inverted T-shaped groove is installed at the lower end of the two vertical sections of the fixing frame.

[0020] The specific processing method for welding the pentagonal lower side beam of a rail vehicle using the above-mentioned welding processing equipment includes the following steps: Step 1, loading and internal correction: place the lower side beam on a U-shaped base, and push the lower side beam toward the inner support correction mechanism. When the lower side beam enters between the inner support frame and the fixed frame, the inner support frame is inserted into the lower side beam to press and correct the deformed inner concave surface of the lower side beam close to the inner wall.

[0021] Step 2: Limiting and locking: The two ends of the lower beam are pressed and limited by the supporting mechanism, and the supporting mechanism also supports the suspended end of the support tube.

[0022] Step 3: External pressure correction: The four correction plates are driven by the pressure driving group to move toward the corresponding end faces of the lower beam at the same time. During the movement, the correction plates press the corresponding end faces of the lower beam against the inner support frame to correct the outward-expanded side walls of the lower beam.

[0023] Step 4: Internal and external correction and welding: The external pressure correction mechanism and the internal support correction mechanism are driven to move synchronously by the correction welding drive source. The external pressure correction mechanism and the internal support correction mechanism cooperate with each other to correct the lower beam inside and outside, and at the same time, the corrected and aligned welds are welded until the welding of the lower beam is completed.

[0024] Step 5: Unlock and remove the material: The supporting mechanism no longer limits and locks the lower beam, corrects the pressure plate away from the lower beam, and then removes the welded lower beam.

[0025] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. A welding processing equipment for a pentagonal lower side beam of a rail vehicle designed by the present invention corrects and shapes the deformation of the lower side beam caused by rebound expansion and excessive inward concave bending after bending by cooperating with an internal support correction mechanism and an external pressure correction mechanism, so that the two ends of the welding point of the lower side beam can be accurately aligned, avoiding a large gap in the lower side beam or offset at both ends of the welding point, which affects the welding quality and the bearing capacity of the lower side beam after welding, and adopts a correction welding drive source to drive the internal support correction mechanism and the external pressure correction mechanism to move synchronously, so as to realize the function of correcting and shaping while welding, so that the lower side beam can be quickly welded after correction, which greatly improves the welding quality of the lower side beam.

[0026] 2. The inner support correction mechanism and the external pressure correction mechanism in the present invention move synchronously, and the lower beam is corrected and welded at the same time. The inner support frame is relatively short, which avoids the problem that when a longer inner support frame is inserted into the lower beam for correction, the friction between the two is large, resulting in the lower beam being difficult to detach from the inner support frame after welding.

[0027] 3. The supporting mechanism in the present invention can not only limit and fix the two ends of the lower beam to prevent the lower beam from moving during the correction welding process, but also support and fix the suspended end of the support tube to avoid instability caused by the suspended end of the support tube, which affects the correction of the lower beam by the internal support correction mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0029] Figure 1 It is a diagram of the method steps of the present invention.

[0030] Figure 2 It is an overall diagram of the welding processing equipment of the present invention.

[0031] Figure 3 It is a three-dimensional structural schematic diagram of the external pressure correction mechanism and the internal support correction mechanism of the present invention.

[0032] Figure 4 yes Figure 3 Rear cross-sectional view of .

[0033] Figure 5 It is a three-dimensional structural schematic diagram of the supporting mechanism of the present invention.

[0034] Figure 6 yes Figure 5 Main sectional view.

[0035] Figure 7 It is a three-dimensional structural schematic diagram of the inner support correction mechanism of the present invention.

[0036] Figure 8 It is a structural schematic diagram of the correction welding drive source of the present invention.

[0037] Figure numerals: 1, equipment box; 2, track; 3, support cylinder; 4, U-shaped base; 5, internal support correction mechanism; 50, connecting plate; 51, internal support frame; 510, mounting groove; 511, anti-friction roller 2; 6, external pressure correction mechanism; 60, correction pressure plate; 61, anti-friction roller 1; 62, pressing drive group; 620, elastic connector; 621, fixed cylinder; 622, connecting rod; 623, inverted L-shaped frame; 624, wedge-shaped pressing block; 625, wedge-shaped block; 63, welding machine; 64, fixed frame; 7, correction welding drive source; 70, hydraulic cylinder; 71, connecting frame; 72. Storage slot; 73. Push rod; 74. Push rod; 75. Push connector; 750. Fixed plate; 751. Connecting leg; 752. Guide slot; 8. Support mechanism; 80. U-shaped blocking strip; 81. Support locking group; 810. Support frame; 811. Expansion plate; 812. Slot; 813. L-shaped hook plate; 814. Return spring; 815. Socket; 82. End support group; 820. Fixed seat; 821. T-shaped blocking strip; 830. Lower plug-in; 831. Push spring; 9. Guide connection group; 90. Inverted T-shaped sliding column; 10. Lower side beam. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] See also Figure 2 A welding method for a pentagonal lower beam of a rail vehicle is completed using a welding device for the pentagonal lower beam of a rail vehicle. The welding device includes a device box 1. One side of the device box 1 arranged along its length direction is equipped with a track 2, a support tube 3 and a U-shaped base 4 arranged in sequence from top to bottom.

[0041] See also Figure 2 and Figure 3 An inner support correction mechanism 5 for correcting the inner wall of the lower beam 10 is installed on the support tube 3, and an external pressure correction mechanism 6 for correcting the outer wall of the lower beam 10 in cooperation with the inner support correction mechanism 5 is slidably connected to the track 2.

[0042] See also Figure 2 and Figure 3 The equipment box 1 is equipped with a correction welding driving source 7 that drives the external pressure correction mechanism 6 and the internal support correction mechanism 5 to move synchronously, and the U-shaped base 4 is equipped with a supporting mechanism 8 that fixes the lower side beam 10 and supports the suspended end of the support tube 3.

[0043] See also Figure 3 , Figure 4 and Figure 7 The inner support correction mechanism 5 includes a connecting plate 50 slidably connected to the supporting tube 3, and an inner support frame 51 of the same shape as the lower side beam 10 is fixedly sleeved on the connecting plate 50. The side of the inner support frame 51 away from the equipment box 1 is arc-shaped, so that the lower side beam 10 can be sleeved on the inner support frame 51. After the lower side beam 10 is sleeved on the inner support frame 51 and continues to move, the inner support frame 51 squeezes the concave part of the side wall of the lower side beam 10, thereby correcting the concave part of the side wall of the lower side beam 10, and then moves synchronously with the external pressure correction mechanism 6, and the lower side beam 10 is corrected and welded at the same time, avoiding the problem that the longer inner support frame 51 is difficult to disengage due to the large friction between the two when being inserted into the lower side beam 10 for correction.

[0044] See also Figure 7The outer wall of the inner support frame 51 is provided with mounting grooves 510 evenly arranged along its length direction, and the five end faces of the mounting grooves 510 are rotatably connected with anti-friction rollers 511. The side walls of the anti-friction rollers 511 are flush with the inner support frame 51, which does not affect the correction of the inner wall of the lower side beam 10 and reduces the friction between the inner support frame 51 and the inner wall of the lower side beam 10.

[0045] See also Figure 2 , Figure 3 and Figure 4 The external pressure correction mechanism 6 includes a fixed frame 64 installed on the track 2 and sliding along its length direction and four correction pressure plates 60. The fixed frame 64 is in an inverted shape. The four correction pressure plates 60 are used to press and correct the remaining four end faces except the lower end face of the lower side beam 10. A plurality of anti-friction rollers 61 are installed on the end face of the correction pressure plate 60 away from the fixed frame 64. A pressure driving group 62 for driving the four correction pressure plates 60 is installed on the fixed frame 64. A welding machine 63 is installed on the side of the horizontal section of the fixed frame 64 close to the equipment box 1.

[0046] After the lower beam 10 is mounted on the inner support frame 51, the pressing drive group 62 drives the four correction plates 60 to move toward the four side surfaces of the upper side of the lower beam 10 respectively until the correction plates 60 press the outer wall of the lower beam 10 against the inner support frame 51, thereby correcting and shaping the outwardly expanded part of the side wall of the lower beam 10, so that the ends of the welding parts of the lower beam 10 are aligned, avoiding a large weld gap of the lower beam 10, affecting the welding quality and the bearing capacity of the lower beam 10 after welding. The welding machine 63 welds the lower beam 10 while the fixing frame 64 drives the correction plate 60 to move horizontally.

[0047] See also Figure 2 , Figure 3 and Figure 4 The pressure driving group 62 includes an elastic connecting member 620 installed on the opposite surfaces of the two vertical sections of the fixed frame 64, wherein the two correction pressure plates 60 are respectively connected to the two vertical sections of the fixed frame 64 through the elastic connecting member 620, and the horizontal section of the fixed frame 64 is installed with two fixed cylinders 621 arranged symmetrically along its length direction, and the fixed cylinder 621 is plugged with a connecting rod 622 that slides through the fixed frame 64, and the lower end of the connecting rod 622 is installed with an inverted L-shaped frame 623, and the horizontal section end of the inverted L-shaped frame 623 is connected to the corresponding correction pressure plate 60 located on the upper side, and the other end of the inverted L-shaped frame 623 is installed with a wedge-shaped pressure block 624, and the vertical correction pressure plate 60 is installed with a wedge-shaped block 625 that matches the wedge-shaped pressure block 624, and the fixed frame 64 is installed with a hydraulic driving member (not shown in the figure) that drives the two connecting rods 622 to move up and down.

[0048] After the two ends of the lower side beam 10 are limited and fixed by the supporting mechanism 8, the two connecting rods 622 are driven by the hydraulic drive component to drive the inverted L-shaped frames 623 connected to them to move downward. At this time, the fixed cylinder 621 supports and guides the connecting rod 622 to improve the stability of the connecting rod 622. When the inverted L-shaped frame 623 moves downward, it drives the correction pressure plate 60 connected to it to move downward. At the same time, the wedge-shaped stop block 624 on the inverted L-shaped frame 623 contacts the wedge block 625 and pushes the two vertical correction pressure plates 60 to move toward the side wall of the lower side beam 10 until the four correction pressure plates 60 press the four side walls of the lower side beam 10 against the inner support frame 51, thereby correcting the outward-expanding part of the side wall of the lower side beam 10, so that the ends of the welding parts of the lower side beam 10 are aligned.

[0049] See also Figure 4 The elastic connecting member 620 includes a storage tube installed in the vertical section of the fixed frame 64, and a guide rod fixedly connected to the corresponding correction pressure plate 60 is slidably connected to the storage tube, and a tension spring is also installed between the storage tube and the corresponding correction pressure plate 60. When the inverted L-shaped frame 623 moves upward, the correction pressure plate 60 connected to the tension spring is away from the outer wall of the lower side beam 10 under the action of the elastic force of the tension spring, so as to facilitate the removal of the lower side beam 10 after welding.

[0050] See also Figure 2 , Figure 5 and Figure 6 The supporting mechanism 8 includes a C-shaped blocking bar 80, an end abutment group 82 and a supporting locking group 81 which are installed on the C-shaped base 4 and arranged in sequence along its length direction. The C-shaped blocking bar 80 is installed on the side of the C-shaped base 4 close to the equipment box 1. The end abutment group 82 is used to limit the end of the lower beam 10 away from the equipment box 1. The supporting locking group 81 is used to drive the end abutment group 82 to limit the lower beam 10 and support the suspended end of the support tube 3.

[0051] The lower side beam 10 is placed on the U-shaped base 4, and the lower side beam 10 is pushed to move toward the inner support correction mechanism 5, so that the lower side beam 10 is sleeved on the inner support frame 51 and continues to move until the end of the lower side beam 10 is tightly pressed against the U-shaped blocking strip 80, and then the end abutment group 82 is driven by the supporting locking group 81 to limit and press against the other end of the lower side beam 10, thereby realizing the limit fixation of the two ends of the lower side beam 10, and avoiding the movement of the lower side beam 10 under the push of the inner support correction mechanism 5 and the external pressure correction mechanism 6 when the inner support correction mechanism 5 and the external pressure correction mechanism 6 cooperate to align the side wall correction weld of the lower side beam 10, thereby affecting the correction and welding quality of the lower side beam 10.

[0052] See also Figure 2 and Figure 5The end abutment group 82 includes a fixing seat 820 installed on the top of the vertical section of the U-shaped base 4, and a T-shaped stop bar 821 is slidably inserted on the fixing seat 820, and the horizontal section of the T-shaped stop bar 821 slides through the fixing seat 820.

[0053] See also Figure 2 , Figure 5 and Figure 6 The supporting locking group 81 includes a supporting frame 810 installed between the track 2 and the U-shaped base 4, and two L-shaped hook plates 813 are slidably connected to the supporting frame 810. An expansion disk 811 is installed at the end of the supporting tube 3. The side wall of the expansion disk 811 is provided with two symmetrically arranged slots 812. One of the horizontal sections of the L-shaped hook plate 813 is plugged into the corresponding slot 812, and the other horizontal section of the L-shaped hook plate 813 is connected to the T-shaped baffle 821. A return spring 814 is installed between the fixed seat 820 and the L-shaped hook plate 813 and is sleeved on the T-shaped baffle 821. A socket 815 that runs through the upper and lower ends of the L-shaped hook plate 813 is provided at one end of the L-shaped hook plate 813 inserted into the socket 812, and a latch member that is plugged into the socket 815 to lock the L-shaped hook plate 813 is installed on the expansion disk 811.

[0054] When one end of the lower side beam 10 is pressed against the U-shaped blocking strip 80, the L-shaped hook plate 813 is pulled to move toward the slot 812. When moving, the L-shaped hook plate 813 pulls the T-shaped blocking strip 821 to move, so that the horizontal section of the T-shaped blocking strip 821 close to the end of the lower side beam 10 is pressed against the end of the lower side beam 10, thereby achieving the limiting fixation of the two ends of the lower side beam 10. At the same time, the L-shaped hook plate 813 is inserted into the slot 812, and the latch member locks the L-shaped hook plate 813 and the expansion plate 811. The supporting locking group 81 can not only drive the T-shaped blocking strip 821 to press the lower side beam 10, but also support and fix the end of the support tube 3, thereby achieving multiple effects.

[0055] See also Figure 5 and Figure 6 The latch member includes a spring groove opened on the top of the side wall of the expansion plate 811, and a lower plug-in 830 is slidably inserted in the spring groove. The lower plug-in 830 is in an inverted shape. The two vertical sections of the lower plug-in 830 slide through the corresponding slots 812 and are inserted into the socket 815. A push spring 831 is installed between the lower plug-in 830 and the spring groove.

[0056] Before the end of the L-shaped hook plate 813 is inserted into the slot 812, it is first manually inserted into the spring groove and then the lower plug-in 830 is pulled upward to prevent the lower plug-in 830 from obstructing the insertion of the end of the L-shaped hook plate 813 into the slot 812. After both L-shaped hook plates 813 are inserted into the slot 812, the lower plug-in 830 is released and inserted downward into the socket 815 under the elastic force of the push spring 831, thereby locking the L-shaped hook plate 813 and the expansion tray 811.

[0057] See also Figure 2 , Figure 3 , Figure 4 and Figure 8 The correction welding drive source 7 includes a hydraulic cylinder 70 and a connecting frame 71. The hydraulic cylinder 70 is installed in the equipment box 1. The telescopic end of the hydraulic cylinder 70 is connected to the connecting frame 71. The connecting frame 71 is in a "F" shape. The hydraulic cylinder 70 is located in the connecting frame 71. The equipment box 1 is provided with a storage groove 72 for accommodating the connecting frame 71, which is symmetrically arranged up and down. A push rod 73 is installed between one end of the connecting frame 71 located on the upper side and the fixed frame 64. A push rod 74 inserted into the support tube 3 is installed at the other end of the connecting frame 71. The push rod 74 is connected to the connecting plate 50 through a push connector 75.

[0058] When the four correction pressure plates 60 are pressed against the side wall of the lower beam 10, the hydraulic cylinder 70 starts to push the connecting frame 71 to drive the push rod 73 and the push rod 74 to move, and the push rod 73 pushes the fixed frame 64 to drive the four correction pressure plates 60 to move, and the push rod 74 drives the inner support frame 51 to move through the push connecting piece 75. The four correction pressure plates 60 cooperate with the inner support frame 51 to move, so as to correct the inner wall and the outer wall of the lower beam 10 to avoid rebound after the lower beam 10 is bent and formed, resulting in a larger weld gap due to the concave or outward expansion of the side wall of the lower beam 10. During the movement of the fixed frame 64, the welding machine 63 connected to the fixed frame 64 welds the corrected lower beam 10.

[0059] See also Figure 3 and Figure 4 The push-connecting member 75 includes a fixed plate 750 installed at one end of the push rod 74 away from the connecting frame 71, and three connecting legs 751 are installed between the fixed plate 750 and the connecting plate 50 and are evenly arranged along the circumference of the fixed plate 750. The side wall of the support tube 3 is provided with a guide groove 752 which corresponds to the connecting leg 751 one by one and slides with the connecting leg 751.

[0060] The three connecting legs 751 and the fixed plate 750 form a triangular support leg structure, so that the thrust when the push rod 74 pushes the connecting plate 50 is evenly dispersed. At the same time, the connecting legs 751 cooperate with the guide grooves 752 to guide the movement of the connecting plate 50 and the inner support frame 51, thereby improving the stability of the movement of the inner support frame 51 and the accuracy of the inner support frame 51 in correcting the inner wall of the lower side beam 10.

[0061] See also Figure 2 and Figure 3The fixing frame 64 is slidably connected to the C-shaped base 4 through a guide connection group 9, and the guide connection group 9 includes an inverted T-shaped groove opened at the top of the two vertical sections of the C-shaped base 4, and the lower ends of the two vertical sections of the fixing frame 64 are installed with inverted T-shaped sliding columns 90 that slide with the inverted T-shaped grooves. The bottom of the inverted T-shaped sliding column 90 is rollingly connected with a ball, so that the upper and lower sides of the fixing frame 64 are supported, thereby improving the stability of the movement of the fixing frame 64 and avoiding the displacement of the fixing frame 64 during movement, which affects the smoothness of the external pressure correction mechanism 6 when correcting the lower beam 10.

[0062] See also Figure 1-Figure 8 The specific processing method for welding the pentagonal lower side beam of a rail vehicle using the above-mentioned welding processing equipment includes the following steps: Step 1, loading and internal correction: Place the lower side beam 10 on the U-shaped base 4, and push the lower side beam 10 to move toward the inner support correction mechanism 5. When the lower side beam 10 enters between the inner support frame 51 and the fixed frame 64, the inner support frame 51 is inserted into the lower side beam 10 to press and correct the deformed inner concave surface of the lower side beam 10 close to the inner wall.

[0063] Step 2: Limiting and locking: The two ends of the lower beam 10 are pressed and limited by the supporting mechanism 8, and the supporting mechanism 8 also supports the suspended end of the support tube 3.

[0064] Step 3, external pressure correction: The four correction plates 60 are driven by the pressing driving group 62 to move simultaneously toward the corresponding end faces of the lower beam 10 . During the movement, the correction plates 60 press the corresponding end faces of the lower beam 10 against the inner support frame 51 to correct the outwardly expanded side walls of the lower beam 10 .

[0065] Step 4, internal and external correction and welding: The external pressure correction mechanism 6 and the internal support correction mechanism 5 are driven to move synchronously by the correction welding drive source 7. The external pressure correction mechanism 6 and the internal support correction mechanism 5 cooperate with each other to correct the lower beam 10 inside and outside, and at the same time, the corrected and aligned welds are welded until the welding of the lower beam 10 is completed.

[0066] Step 5, unlocking and removing materials: the supporting mechanism 8 no longer limits and locks the lower beam 10, the correction plate 60 is moved away from the lower beam 10, and then the lower beam 10 is pulled by external equipment to remove the welded lower beam 10.

[0067] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0068] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding method for a pentagonal lower side beam of a rail vehicle, which is completed by using a welding device for a pentagonal lower side beam of a rail vehicle, and is characterized by: The welding processing equipment includes an equipment box, and a track, a support tube and a U-shaped base arranged in sequence from top to bottom are installed on one side of the equipment box; An internal support correction mechanism is installed on the support cylinder, and an external pressure correction mechanism is slidably connected on the track; The equipment box is equipped with a correction welding driving source for driving the external pressure correction mechanism and the internal support correction mechanism to move synchronously, and the U-shaped base is equipped with a supporting mechanism; The inner support correction mechanism comprises a connecting plate slidably connected to the supporting tube, and an inner support frame having the same shape as the lower side beam is fixedly sleeved on the connecting plate; The external pressure correction mechanism includes a fixed frame installed on the track and sliding along the length direction thereof and four correction plates, the fixed frame is in an inverted shape, the four correction plates are used to press and correct the remaining four end faces except the lower end face of the lower beam, a pressing driving group for driving the correction plates is installed on the fixed frame, and a welding machine is installed on the horizontal section of the fixed frame; The fixing frame and the U-shaped base are slidably connected via a guide connection group; The specific processing method for welding the pentagonal lower side beam of a rail vehicle using the above-mentioned welding processing equipment includes the following steps: Step 1: Push the lower beam placed on the U-shaped base toward the inner support correction mechanism, so that the inner support frame presses and corrects the lower beam; Step 2: Use the supporting mechanism to press and limit the two ends of the lower beam and support the suspended end of the support tube; Step 3: driving the correction plate through the pressing driving group to correct the side wall of the lower beam that expands outward; Step 4: Use the correction welding drive source to drive the external pressure correction mechanism and the internal support correction mechanism to correct the lower beam inside and outside, and perform welding at the same time; Step 5: After the support mechanism is released from the limit lock and the pressure plate is corrected to be away from the lower side beam, remove the lower side beam.

2. The welding method for a pentagonal lower side beam of a rail vehicle according to claim 1, characterized in that: The correction welding drive source includes a hydraulic cylinder and a connecting frame. The hydraulic cylinder is installed in an equipment box. The telescopic end of the hydraulic cylinder is connected to the connecting frame. The connecting frame is in a "+" shape. The hydraulic cylinder is located in the connecting frame. The equipment box is provided with storage grooves for accommodating the connecting frame that are symmetrically arranged up and down. A push rod is installed between one end of the connecting frame located on the upper side and the fixed frame. A push rod inserted into the support tube is installed at the other end of the connecting frame. The push rod is connected to the connecting plate through a push connector.

3. The welding method for a pentagonal lower side beam of a rail vehicle according to claim 1, characterized in that: The pressure driving group includes elastic connecting parts installed on the opposite surfaces of the two vertical sections of the fixed frame, wherein the two correction pressure plates are respectively connected to the two vertical sections of the fixed frame through elastic connecting parts, and the horizontal section of the fixed frame is installed with two fixed cylinders symmetrically arranged along its length direction, and a connecting rod sliding through the fixed frame is inserted on the fixed cylinder, and an inverted L-shaped frame is installed at the lower end of the connecting rod, and the end of the horizontal section of the inverted L-shaped frame is connected to the corresponding correction pressure plate located on the upper side, and a wedge-shaped resistance block is installed at the other end of the inverted L-shaped frame, and a wedge block matching the wedge-shaped resistance block is installed on the vertical correction pressure plate.

4. The welding method for a pentagonal lower side beam of a rail vehicle according to claim 1, characterized in that: The supporting mechanism includes a C-shaped blocking bar, an end abutment group and a supporting locking group which are installed on the C-shaped base and arranged in sequence along its length direction. The C-shaped blocking bar is installed on the side of the C-shaped base close to the equipment box, the end abutment group is used to limit the end of the lower beam away from the equipment box, and the supporting locking group is used to drive the end abutment group to limit the lower beam and support the suspended end of the support tube.

5. The welding method for a pentagonal lower side beam of a rail vehicle according to claim 4, characterized in that: The end abutment group comprises a fixing seat installed on the top of the vertical section of the U-shaped base, a T-shaped baffle bar is slidably inserted on the fixing seat, and the T-shaped baffle bar slides through the fixing seat.

6. The welding method for a pentagonal lower side beam of a rail vehicle according to claim 5, characterized in that: The supporting and locking group includes a supporting frame installed between the track and the U-shaped base, and two L-shaped hook plates are slidably connected to the supporting frame. An expansion disk is installed at the end of the supporting tube, and the side wall of the expansion disk is provided with two symmetrically arranged slots, one of the horizontal sections of the L-shaped hook plate is plugged into the corresponding slot, and the other horizontal section of the L-shaped hook plate is connected to the T-shaped baffle, and a reset spring is installed between the fixed seat and the L-shaped hook plate, and a socket is provided at one end of the L-shaped hook plate inserted into the slot and passes through the upper and lower parts, and a latch member is installed on the expansion disk and is plugged into the socket to lock the L-shaped hook plate.

7. The welding method for a pentagonal lower side beam of a rail vehicle according to claim 2, characterized in that: The push-to-connect member includes a fixed plate installed at one end of the push rod away from the connecting frame, three connecting legs evenly arranged along the circumference of the fixed plate are installed between the fixed plate and the connecting plate, and the side wall of the support tube is provided with guide grooves corresponding to the connecting legs one by one and slidingly cooperating with the connecting legs.

8. The welding method for a pentagonal lower side beam of a rail vehicle according to claim 6, characterized in that: The latch member includes a spring groove opened on the top of the expansion disk side wall, in which a lower plug-in is slidably inserted, the lower plug-in is in an inverted shape, and two vertical sections of the lower plug-in slide through the corresponding slots and then plugged into the jack, and a push spring is installed between the lower plug-in and the spring groove.

9. The welding method for a pentagonal lower side beam of a rail vehicle according to claim 1, characterized in that: The guide connection group includes inverted T-shaped grooves on the tops of the two vertical sections of the U-shaped base, and inverted T-shaped sliding columns that slide in cooperation with the inverted T-shaped grooves are installed on the lower ends of the two vertical sections of the fixing frame.

10. The welding method for a pentagonal lower side beam of a rail vehicle according to claim 1, characterized in that: The outer side wall of the inner support frame is provided with mounting grooves evenly arranged along its length direction; a plurality of anti-friction rollers 1 are rotatably mounted on the end face of the correction pressure plate away from the fixing frame; and anti-friction rollers 2 are rotatably connected to the five end faces of the mounting groove.

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