A welding and processing method for a pentagonal lower side beam of an orbital vehicle

Abstract

The present invention relates to the technical field of railway vehicle welding, and specifically provides a welding processing method for a pentagonal lower side beam of a railway vehicle, including an equipment box, an internal support correction mechanism, an external pressure correction mechanism, and a supporting and fixing mechanism. The welding processing equipment for the pentagonal lower side beam of the railway vehicle designed by the present invention corrects and shapes the springback and outward expansion after the bending forming of the lower side beam and the deformation caused by excessive inward concavity of the bending through the cooperation of the internal support correction mechanism and the external pressure correction mechanism, so that the two ends of the welding part of the lower side beam can be accurately aligned, avoiding large gaps in the lower side beam or offsets at both ends of the welding part, which affect the welding quality and the bearing capacity of the lower side beam after welding. Moreover, a correction welding drive source is used to drive the internal support correction mechanism and the external pressure correction mechanism to move synchronously, realizing the function of correcting and shaping while welding, enabling the quickly welding of the corrected lower side beam, and greatly improving the welding quality of the lower side beam.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicle welding, and specifically provides 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 torsional resistance. It is an important part of the car body underframe and a key component of the underframe structure. It is mainly used to support and transmit loads to ensure the stability and strength of the car body structure.

[0003] After the pentagonal lower side beam of the rail vehicle is bent and formed, welding is required to make its cross-section in a pentagonal closed shape, so as to provide good bending and torsional resistance for the car body and support the car body equipment and external loads.

[0004] However, after the pentagonal lower side beam of the rail vehicle is bent and formed, it is prone to the phenomena of springback and outward expansion or excessive bending with partial inward concavity, resulting in problems such as an increase in the gap at the weld where the lower side beam needs to be welded and inaccurate alignment of both sides of the lower side beam weld. If welded directly, it is likely to cause poor welding quality and affect the load-bearing capacity of the pentagonal lower side beam of the rail vehicle after welding. Summary of the Invention

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

[0006] To achieve the above object, the embodiments of the present application provide the following technical solution: A welding processing method for a pentagonal lower side beam of a rail vehicle, which is completed in cooperation with a welding processing device for a pentagonal lower side beam of a rail vehicle. The welding processing device includes an equipment box, and on one side of the equipment box arranged along its length direction, there are arranged a track, a support cylinder, and a U-shaped base from top to bottom in sequence.

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

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

[0009] In a possible implementation manner, mounting grooves are formed in the outer side wall of the inner support frame and are uniformly arranged along its length direction. Anti-friction rollers II are rotatably connected to five end faces of each mounting groove.

[0010] The external pressure correction mechanism includes a fixed frame and four correction pressing plates that are slidably mounted on the track along its length direction. The fixed frame is in an inverted U shape. The four correction pressing plates are used to press and correct the other four end faces except the lower end face of the lower side beam. A plurality of anti-friction rollers I are rotatably mounted on the end face of the correction pressing plate away from the fixed frame. A pressing drive group for driving the four correction pressing plates is mounted on the fixed frame. A welding machine is mounted on one side of the horizontal section of the fixed frame close to the equipment box.

[0011] In a possible implementation manner, the pressing drive group includes elastic connectors mounted on the opposite faces of the two vertical sections of the fixed frame. Two of the correction pressing plates are respectively connected to the two vertical sections of the fixed frame through the elastic connectors. Two fixed cylinders are symmetrically arranged along the length direction on the horizontal section of the fixed frame. A connecting rod that slidably penetrates the fixed frame is inserted into the fixed cylinder. The lower end of the connecting rod is mounted with an inverted L-shaped frame. The end of the horizontal section of the inverted L-shaped frame is connected to the corresponding correction pressing plate located on the upper side. A wedge-shaped abutting block is mounted at the other end of the inverted L-shaped frame. A wedge-shaped block that cooperates with the wedge-shaped abutting block is mounted on the vertical correction pressing plate. A hydraulic drive member (not shown in the figure) for driving the two connecting rods to move up and down is mounted on the fixed frame.

[0012] In a possible implementation manner, the elastic connector includes a storage cylinder mounted on the vertical section of the fixed frame. A guide rod that is fixedly connected to the corresponding correction pressing plate is slidably connected to the storage cylinder. A pushing spring is further mounted between the storage cylinder and the corresponding correction pressing plate.

[0013] In a possible implementation manner, the anti-fixing and supporting mechanism includes a U-shaped blocking strip, an end abutting group, and a supporting and locking group that are mounted on the U-shaped base and arranged in sequence along its length direction. The U-shaped blocking strip is mounted on one side of the U-shaped base close to the equipment box. The end abutting group is used to limit one end of the lower side beam away from the equipment box. The supporting and locking group is used to drive the end abutting group to limit the lower side beam and support the suspended end of the support cylinder.

[0014] In a possible implementation manner, the end abutting group includes a fixed seat mounted on the top of the vertical section of the U-shaped base. A T-shaped blocking strip is slidably inserted into the fixed seat, and the T-shaped blocking strip slidably penetrates the fixed seat.

[0015] In a possible implementation manner, the supporting and locking group includes a support frame installed between the track and the U-shaped base. Two L-shaped hook plates are slidably connected to the support frame. An expansion disk is installed at the end of the support cylinder. Two symmetrically arranged slots are formed in the side wall of the expansion disk. One horizontal section of the L-shaped hook plate is inserted into the corresponding slot, and the other horizontal section of the L-shaped hook plate is connected to the T-shaped stop bar. A return spring is installed between the fixed seat and the L-shaped hook plate. A vertically penetrating jack is formed at one end of the L-shaped hook plate inserted into the slot. A pin member is installed on the expansion disk and inserted into the jack to lock the L-shaped hook plate.

[0016] In a possible implementation manner, the pin member includes a spring groove formed at the top of the side wall of the expansion disk. A lower plug-in member is slidably inserted into the spring groove. The lower plug-in member is in an inverted U shape. The two vertical sections of the lower plug-in member slide through the corresponding slot and are inserted into the jack. A pushing spring is installed between the lower plug-in member and the spring groove.

[0017] In a possible implementation manner, the correction and welding driving source includes a hydraulic cylinder and a connecting frame. The hydraulic cylinder is installed in the equipment box. The telescopic end of the hydraulic cylinder is connected to the connecting frame. The connecting frame is in a U shape. The hydraulic cylinder is located inside the connecting frame. Receiving grooves for receiving the connecting frame are symmetrically formed up and down on the equipment box. A pushing rod is installed between the upper end of the connecting frame and the fixed frame. A pushing rod inserted into the support cylinder is installed at the other end of the connecting frame. The pushing rod is connected to the connecting plate through a pushing connecting member.

[0018] In a possible implementation manner, the pushing connecting member includes a fixed disk installed at one end of the pushing rod away from the connecting frame. Three connecting legs are uniformly arranged circumferentially along the fixed disk between the fixed disk and the connecting plate. Guide grooves corresponding to the connecting legs one by one and slidably cooperating with the connecting legs are formed in the side wall of the support cylinder.

[0019] In a possible implementation manner, the fixed frame and the U-shaped base are slidably connected through a guiding connection group. The guiding connection group includes inverted T-shaped grooves formed at the tops of the two vertical sections of the U-shaped base. Inverted T-shaped sliding columns slidably cooperating with the inverted T-shaped grooves are installed at the lower ends of the two vertical sections of the fixed frame.

[0020] When using the above welding processing equipment for welding production of the pentagonal lower side beam of a rail vehicle, the specific processing method includes the following steps: Step 1, inner correction during loading: Place the lower side beam on the U-shaped base and push the lower side beam towards the inner support and 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 concave surface near the inner wall of the lower side beam where deformation occurs.

[0021] Step 2, limiting and locking: Press and limit the two ends of the lower side beam through the pressing and supporting mechanism, and the pressing and supporting mechanism also supports the suspended end of the support cylinder.

[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 to correct the lower side beam inside and outside, and at the same time weld the corrected and aligned welds until the welding of the lower side beam is completed.

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

[0025] The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. The welding processing equipment for the 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 and forming by cooperating with the internal support correction mechanism and the 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, realizing the function of correcting and shaping while welding, so that the lower side beam can be welded quickly after correction, which greatly improves the welding quality of the lower side beam.

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

[0027] 3. The supporting mechanism in the present invention can not only limit and fix the two ends of the lower side beam to prevent the lower side 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 side 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 process step diagram of the present invention.

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

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

[0032] Figure 4 It is Figure 3 a rear view cross-sectional view of

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

[0034] Figure 6 It is Figure 5 a main cross-sectional view of

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

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

[0037] Reference 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, installation groove; 511, friction reducing roller II; 6, external pressure correction mechanism; 60, correction pressing plate; 61, friction reducing roller I; 62, pressing drive group; 620, elastic connecting piece; 621, fixed cylinder; 622, connecting rod; 623, inverted L-shaped frame; 624, wedge-shaped pressing block; 625, wedge-shaped block; 63, welding machine; 64, fixing frame; 7, correction welding drive source; 70, hydraulic cylinder; 71, connecting frame; 72, storage groove; 73, pushing rod; 74, pushing rod; 75, pushing connecting piece; 750, fixing plate; 751, connecting leg; 752, guiding groove; 8, fixing and supporting mechanism; 80, U-shaped blocking strip; 81, supporting and locking group; 810, supporting frame; 811, expansion plate; 812, slot; 813, L-shaped hook plate; 814, return spring; 815, jack; 82, end pressing group; 820, fixing seat; 821, T-shaped blocking strip; 830, lower plug-in part; 831, pushing spring; 9, guiding and connecting group; 90, inverted T-shaped sliding column; 10, lower side beam. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

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

[0040] Referring to Figure 2 , a welding and processing method for a pentagonal lower side beam of a rail vehicle, which is completed in cooperation with a welding and processing device for a pentagonal lower side beam of a rail vehicle. The welding and processing device includes an equipment box 1, and on one side of the equipment box 1 arranged along its length direction, there are arranged a track 2, a support cylinder 3, and a U-shaped base 4 from top to bottom in sequence.

[0041] Referring to Figure 2 And Figure 3 , an inner support correction mechanism 5 for correcting the inner side wall of the lower side beam 10 is installed on the support cylinder 3, and an outer pressure correction mechanism 6 that is slidably connected to the track 2 and cooperates with the inner support correction mechanism 5 to correct the outer side wall of the lower side beam 10 is provided.

[0042] Referring to Figure 2 And Figure 3 , a correction welding drive source 7 for driving the outer pressure correction mechanism 6 and the inner support correction mechanism 5 to move synchronously is installed on the equipment box 1, and a resistance fixing and supporting mechanism 8 for fixing the lower side beam 10 and supporting the suspended end of the support cylinder 3 is installed on the U-shaped base 4.

[0043] Referring to Figure 3 , Figure 4 And Figure 7 , the inner support correction mechanism 5 includes a connecting plate 50 slidably connected to the support cylinder 3, and an inner support frame 51 having 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 as to facilitate sleeving the lower side beam 10 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 side wall of the lower side beam 10. Then, it moves synchronously with the outer pressure correction mechanism 6, correcting and welding the lower side beam 10 simultaneously, avoiding the problem that it is difficult to separate when a relatively long inner support frame 51 is inserted into the lower side beam 10 for correction due to the large frictional force between the two.

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

[0045] Refer to Figure 2 , Figure 3 and Figure 4 , the external pressing and correcting mechanism 6 includes a fixed frame 64 and four correcting pressing plates 60 that are slidably mounted along the length direction on the rail 2. The fixed frame 64 is in an inverted U shape. The four correcting pressing plates 60 are used to press and correct the other four end faces except the lower end face of the lower side beam 10. On the end face of the correcting pressing plate 60 away from the fixed frame 64, a plurality of antifriction rollers I 61 are rotatably mounted. On the fixed frame 64, a pressing driving group 62 for driving the four correcting pressing plates 60 is mounted. On the side of the horizontal section of the fixed frame 64 close to the equipment box 1, a welding machine 63 is mounted.

[0046] After the lower side beam 10 is sleeved on the inner support frame 51, the pressing driving group 62 drives the four correcting pressing plates 60 to move towards the four side faces on the upper side of the lower side beam 10 respectively until the correcting pressing plates 60 press the outer wall of the lower side beam 10 against the inner support frame 51, thereby correcting and shaping the expanded part of the side wall of the lower side beam 10, making the end parts of the welding joints of the lower side beam 10 aligned, avoiding a large weld gap of the lower side beam 10, affecting the welding quality and the bearing capacity of the lower side beam 10 after welding. During the process of the fixed frame 64 driving the correcting pressing plates 60 to move horizontally, the welding machine 63 welds the lower side beam 10.

[0047] Refer to Figure 2 , Figure 3 and Figure 4 , the pressing driving group 62 includes elastic connectors 620 mounted on the opposite faces of the two vertical sections of the fixed frame 64. Two of the correcting pressing plates 60 are respectively connected to the two vertical sections of the fixed frame 64 through the elastic connectors 620. On the horizontal section of the fixed frame 64, two fixed cylinders 621 are symmetrically arranged along its length direction. A connecting rod 622 that slidably penetrates the fixed frame 64 is inserted into the fixed cylinder 621. At the lower end of the connecting rod 622, an inverted L-shaped frame 623 is mounted. The end of the horizontal section of the inverted L-shaped frame 623 is connected to the corresponding correcting pressing plate 60 located on the upper side. At the other end of the inverted L-shaped frame 623, a wedge-shaped abutting block 624 is mounted. On the vertical correcting pressing plate 60, a wedge-shaped block 625 that cooperates with the wedge-shaped abutting block 624 is mounted. On the fixed frame 64, a hydraulic driving member (not shown in the figure) for driving the two connecting rods 622 to move up and down is mounted.

[0048] After the two ends of the lower side beam 10 are limited and fixed by the anti-loosening and supporting mechanism 8, the hydraulic driving member drives the two connecting rods 622 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 rods 622 to improve the stability of the connecting rods 622. When the inverted L-shaped frames 623 move downward, the correction pressing plates 60 connected to them move downward. At the same time, the wedge-shaped abutting blocks 624 on the inverted L-shaped frames 623 abut against the wedge-shaped blocks 625 and push the two vertically arranged correction pressing plates 60 to move toward the side wall of the lower side beam 10 until the four correction pressing plates 60 press against the four side walls of the lower side beam 10 on the inner support frame 51, so as to correct the outward-expanded part of the side wall of the lower side beam 10 and make the end parts of the welded joints of the lower side beam 10 aligned.

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

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

[0051] Place the lower side beam 10 on the U-shaped base 4 and push the lower side beam 10 toward the inner support and 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 abuts tightly against the U-shaped blocking strip 80. Then, the supporting and locking group 81 drives the end abutting group 82 to limit and abut tightly against the other end of the lower side beam 10, so as to realize the limit fixation of the two ends of the lower side beam 10 and prevent the lower side beam 10 from moving under the pushing action of the inner support and correction mechanism 5 and the outer pressure correction mechanism 6 when the inner support and correction mechanism 5 and the outer pressure correction mechanism 6 cooperate to correct the side wall and align the welds of the lower side beam 10, which affects the correction and welding quality of the lower side beam 10.

[0052] Refer to Figure 2 and Figure 5, the end abutting group 82 includes a fixing seat 820 installed at the top of the vertical section of the U-shaped base 4. A T-shaped blocking bar 821 is slidably inserted into the fixing seat 820, and the horizontal section of the T-shaped blocking bar 821 slidably penetrates through the fixing seat 820.

[0053] Refer to Figure 2 , Figure 5 and Figure 6 , the supporting and locking group 81 includes a support frame 810 installed between the track 2 and the U-shaped base 4. Two L-shaped hook plates 813 are slidably connected to the support frame 810. An expansion disk 811 is installed at the end of the support cylinder 3. Two symmetrically arranged slots 812 are formed in the side wall of the expansion disk 811. One horizontal section of the L-shaped hook plate 813 is inserted into the corresponding slot 812. The other horizontal section of the L-shaped hook plate 813 is connected to the T-shaped blocking bar 821. A return spring 814 sleeved on the T-shaped blocking bar 821 is installed between the fixing seat 820 and the L-shaped hook plate 813. A vertically penetrating jack 815 is formed at one end of the L-shaped hook plate 813 inserted into the slot 812. A pin member is installed on the expansion disk 811 and inserted into the jack 815 to lock the L-shaped hook plate 813.

[0054] After one end of the lower side beam 10 abuts against the U-shaped blocking bar 80, pull the L-shaped hook plate 813 towards the slot 812. When the L-shaped hook plate 813 moves, it pulls the T-shaped blocking bar 821 to move, so that the horizontal section of the T-shaped blocking bar 821 on the side close to the end of the lower side beam 10 abuts against the end of the lower side beam 10, thus realizing the limit fixation of both 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 pin member locks the L-shaped hook plate 813 and the expansion disk 811. The supporting and locking group 81 can not only drive the T-shaped blocking bar 821 to abut against the lower side beam 10, but also support and fix the end of the support cylinder 3, achieving multiple effects.

[0055] Refer to Figure 5 and Figure 6 , the pin member includes a spring groove formed at the top of the side wall of the expansion disk 811. A lower plug-in member 830 is slidably inserted into the spring groove. The lower plug-in member 830 is in an inverted U shape. The two vertical sections of the lower plug-in member 830 slidably penetrate through the corresponding slot 812 and are inserted into the jack 815. A pushing spring 831 is installed between the lower plug-in member 830 and the spring groove.

[0056] Before the end of the L-shaped hook plate 813 is inserted into the slot 812, first manually insert it into the spring groove and then pull the lower plug-in member 830 upward to move, so as to prevent the lower plug-in member 830 from hindering the end of the L-shaped hook plate 813 from being inserted into the slot 812. After both L-shaped hook plates 813 are inserted into the slot 812, release the lower plug-in member 830. The lower plug-in member 830 is inserted downward into the jack 815 under the elastic force of the pushing spring 831, thereby locking the L-shaped hook plate 813 and the expansion disk 811.

[0057] Refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 8 As shown in FIGS.

[0058] After the four correction pressing plates 60 are pressed against the side wall of the lower beam 10, the hydraulic cylinder 70 is activated to push the connecting frame 71 to drive the push rod 73 and the push rod 74 to move. The push rod 73 pushes the fixed frame 64 to drive the four correction pressing plates 60 to move. The push rod 74 drives the inner support frame 51 to move through the push connecting member 75. The four correction pressing plates 60 and the inner support frame 51 cooperate to move, so as to correct the inner side wall and the outer side wall of the lower beam 10, and avoid the springback after the lower beam 10 is bent and formed, resulting in the inner concavity or outer expansion of the side wall of the lower beam 10 and a large weld gap. 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] Refer to Figure 3 and Figure 4 As shown in FIGS.

[0060] The three connecting legs 751 and the fixed disk 750 form a triangular 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 guiding grooves 752 to guide the movement of the connecting plate 50 and the inner support frame 51, improving the stability of the movement of the inner support frame 51 and the accuracy of the correction of the inner wall of the lower beam 10 by the inner support frame 51.

[0061] Refer to Figure 2 and Figure 3, the fixing frame 64 is slidably connected to the U-shaped base 4 through a guiding connection group 9. The guiding connection group 9 includes inverted T-shaped grooves opened at the tops of the two vertical sections of the U-shaped base 4. At the lower ends of the two vertical sections of the fixing frame 64, inverted T-shaped sliding columns 90 that are slidably matched with the inverted T-shaped grooves are installed. At the bottom of the inverted T-shaped sliding column 90, a ball is rotatably connected, so that both the upper and lower sides of the fixing frame 64 have supports, thereby improving the stability of the movement of the fixing frame 64 and preventing the fixing frame 64 from shifting during movement and affecting the smoothness of the external pressure correction mechanism 6 when correcting the lower side beam 10.

[0062] Refer to Figures 1 - 8 , when using the above welding processing equipment to weld the pentagonal lower side beam of the rail vehicle, the specific processing method includes the following steps: Step 1, internal feeding and correction: Place the lower side beam 10 on the U-shaped base 4, and push the lower side beam 10 towards the internal support correction mechanism 5. When the lower side beam 10 enters between the internal support frame 51 and the fixing frame 64, the internal support frame 51 is inserted into the lower side beam 10 to press and correct the concave surface of the lower side beam 10 near the inner wall that is deformed.

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

[0064] Step 3, external pressure correction: Drive the four correction pressing plates 60 to move downward towards the corresponding end faces of the lower side beam 10 through the pressing drive group 62. During the movement of the correction pressing plates 60, the corresponding end faces of the lower side beam 10 are pressed against the internal support frame 51 to correct the outward-expanded side walls of the lower side beam 10.

[0065] Step 4, internal and external correction and welding: Drive the external pressure correction mechanism 6 and the internal support correction mechanism 5 to move synchronously through the correction welding drive source 7. The external pressure correction mechanism 6 and the internal support correction mechanism 5 cooperate to perform internal and external corrections on the lower side beam 10, and at the same time weld the corrected and aligned welds until the welding of the lower side beam 10 is completed.

[0066] Step 5, unlocking and material taking: The counteracting and supporting mechanism 8 no longer limits and locks the lower side beam 10, the correction pressing plates 60 are separated from the lower side beam 10, and then the welded lower side beam 10 is taken off by pulling the lower side beam 10 through an external device.

[0067] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", etc. is 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, 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. Therefore, it should not be construed as a limitation to the present invention.

[0068] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", "installed", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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.

[0069] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A welding processing method for a pentagonal lower side beam of a rail vehicle, which is completed by using a welding processing equipment for a pentagonal lower side beam of a rail vehicle, and is characterized in that: The welding processing equipment includes an equipment box, and on one side of the equipment box, there are arranged a track, a support cylinder, and a U-shaped base from top to bottom in sequence; An inner support correction mechanism is installed on the support cylinder, and an outer pressure correction mechanism is slidably connected to the track; A correction welding drive source for driving the outer pressure correction mechanism and the inner support correction mechanism to move synchronously is installed on the equipment box, and a resistance fixing and supporting mechanism is installed on the U-shaped base; The inner support correction mechanism includes a connecting plate slidably connected to the support cylinder, and an inner support frame having the same shape as the lower side beam is fixedly sleeved on the connecting plate; The outer pressure correction mechanism includes a fixed frame slidably installed on the track along its length direction and four correction pressing plates. The fixed frame is in an inverted U shape. The four correction pressing plates are used to press and correct the other four end faces except the lower end face of the lower side beam. A pressing drive group for driving the correction pressing plates is installed on the fixed frame, and a welding machine is installed on the horizontal section of the fixed frame; The fixed frame and the U-shaped base are slidably connected through a guiding connection group; The specific processing method when using the above welding processing equipment for welding production of the pentagonal lower side beam of a rail vehicle includes the following steps: Step 1: Push the lower side beam placed on the U-shaped base towards the inner support correction mechanism, so that the inner support frame presses and corrects the lower side beam; Step 2: Press and limit the two ends of the lower side beam through the resistance fixing and supporting mechanism and support the suspended end of the support cylinder; Step 3: Drive the correction pressing plates to correct the outward-expanded side walls of the lower side beam through the pressing drive group; Step 4: Drive the outer pressure correction mechanism and the inner support correction mechanism to perform internal and external corrections on the lower side beam through the correction welding drive source, and perform welding at the same time; Step 5: After the resistance fixing and supporting mechanism releases the limit lock and the correction pressing plates move away from the lower side beam, take off the lower side beam; The correction welding drive source includes a hydraulic cylinder and a connecting frame. The hydraulic cylinder is installed inside the equipment box, and the telescopic end of the hydraulic cylinder is connected to the connecting frame. The connecting frame is in a U shape. The hydraulic cylinder is located inside the connecting frame. Receiving grooves for receiving the connecting frame are symmetrically arranged up and down on the equipment box. A pushing rod is installed between the upper end of the connecting frame and the fixed frame. A pushing rod inserted into the support cylinder is installed at the other end of the connecting frame. The pushing rod is connected to the connecting plate through a pushing connecting piece; The pressing drive group includes elastic connecting pieces installed on the opposite faces of the two vertical sections of the fixed frame. Two of the correction pressing plates are respectively connected to the two vertical sections of the fixed frame through the elastic connecting pieces. Two fixed cylinders are symmetrically arranged along the length direction on the horizontal section of the fixed frame. A connecting rod slidably penetrating the fixed frame is inserted into the fixed cylinder. The lower end of the connecting rod is installed with an inverted L-shaped frame. The end of the horizontal section of the inverted L-shaped frame is connected to the corresponding correction pressing plate located on the upper side. A wedge-shaped abutting block is installed at the other end of the inverted L-shaped frame. A wedge-shaped block cooperating with the wedge-shaped abutting block is installed on the vertically-shaped correction pressing plate; 2. The welding method for the pentagonal lower side beam of a rail vehicle according to claim 1, characterized in that: The resistance fixing and supporting mechanism includes a U-shaped blocking strip, an end abutting group, and a supporting and locking group arranged in sequence along the length direction on the U-shaped base. The U-shaped blocking strip is installed on the side of the U-shaped base close to the equipment box. The end abutting group is used to limit the end of the lower side beam far from the equipment box, and the supporting and locking group is used to drive the end abutting group to limit the lower side beam and support the suspended end of the support cylinder.

3. A welding and processing method for a pentagonal lower side beam of a rail vehicle according to claim 2, characterized in that: The end abutting group includes a fixing seat installed at the top of the vertical section of the U-shaped base. A T-shaped stop bar is slidably inserted into the fixing seat, and the T-shaped stop bar slidably penetrates through the fixing seat.

4. A welding and processing method for a pentagonal lower side beam of a rail vehicle according to claim 3, characterized in that: The supporting and locking group includes a support frame installed between the track and the U-shaped base. Two L-shaped hook plates are slidably connected to the support frame. An expansion disc is installed at the end of the support cylinder. Two symmetrically arranged slots are formed on the side wall of the expansion disc. One horizontal section of the L-shaped hook plate is inserted into the corresponding slot, and the other horizontal section of the L-shaped hook plate is connected to the T-shaped stop bar. A return spring is installed between the fixing seat and the L-shaped hook plate. A vertically penetrating insertion hole is formed at one end of the L-shaped hook plate inserted into the slot. A pin member is installed on the expansion disc and inserted into the insertion hole to lock the L-shaped hook plate.

5. A welding and processing method for a pentagonal lower side beam of a rail vehicle according to claim 1, characterized in that: The pushing and connecting member includes a fixing disc installed at one end of the pushing rod away from the connecting frame. Three connecting legs are evenly arranged along the circumference of the fixing disc between the fixing disc and the connecting plate. Guide grooves corresponding to the connecting legs one by one and slidably matched with the connecting legs are formed on the side wall of the support cylinder.

6. A welding and processing method for a pentagonal lower side beam of a rail vehicle according to claim 4, characterized in that: The pin member includes a spring groove formed at the top of the side wall of the expansion disc. A lower plug-in member is slidably inserted into the spring groove. The lower plug-in member is in an inverted U shape. The two vertical sections of the lower plug-in member slidably penetrate through the corresponding slot and then are inserted into the insertion hole. A pushing spring is installed between the lower plug-in member and the spring groove.

7. A welding processing method for a pentagonal lower side beam of a rail vehicle according to claim 1, characterized in that: The guiding and connecting group includes inverted T-shaped grooves formed at the tops of the two vertical sections of the U-shaped base. Inverted T-shaped sliding columns slidably matched with the inverted T-shaped grooves are installed at the lower ends of the two vertical sections of the fixing frame.

8. A welding processing method for a pentagonal lower side beam of a rail vehicle according to claim 1, characterized in that: Installation grooves are evenly arranged along the length direction on the outer side wall of the inner support frame. A plurality of first anti-friction rollers are rotatably installed on the end face of the correction pressing plate away from the fixing frame. Second anti-friction rollers are rotatably connected to the five end faces of the installation groove.

Images