Railway vehicle part welding machining tool and method

Abstract

The invention relates to the technical field of railway vehicles, in particular to a railway vehicle part welding machining tool and method.The railway vehicle part welding machining tool comprises supporting frames and further comprises a conveying belt, a driving mechanism, a fixing frame, a transmission wheel, a supporting base, a fixing mechanism and a machining mechanism, and the conveying belt is driven by the driving mechanism to move between the two supporting frames from left to right or from right to left; therefore, the to-be-welded part, placed on the conveying belt, of the rail car roof cover can be conveyed to the machining mechanism, then the rail car roof cover is clamped and fixed through the fixing mechanism, and after clamping and fixing, the rail car roof cover is welded and machined through the machining mechanism. Therefore, the situation that the welding quality of the rail car roof cover is affected due to movement of the rail car roof cover in the welding process can be avoided, and the problem that the rail car roof cover moves in the welding process due to the fact that an existing welding tool does not fix the rail car roof cover is solved. And therefore, the welding quality of the rail car roof cover is influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to a welding tool and method for rail vehicle parts. Background Art

[0002] Rail transit refers to a type of transportation vehicle or transportation system in which operating vehicles need to travel on specific tracks. Compared with traditional vehicles, their bodies are longer and larger. When producing and processing rail vehicle roof covers, they usually need to be welded. Most of the existing rail vehicle roof covers are welded by placing them on the ground and having multiple workers weld around the roof cover. This method not only consumes more manpower, but also has relatively low welding efficiency and quality.

[0003] Prior art CN218745544U discloses a rail vehicle roof cover welding tool. By providing a movable platform, the length of the device can be increased, so as to facilitate adaptation to the size of the rail vehicle roof cover. By providing rolling wheels, the device can utilize the rolling wheels to conveniently move the rail vehicle roof cover when welding the rail vehicle roof cover, thereby improving the welding efficiency of the rail vehicle roof cover. Combined with the device, the position of the laser welding head can be flexibly adjusted, thereby increasing the welding quality of the rail vehicle roof cover by the device. Therefore, the device has efficient and stable welding performance.

[0004] However, the above-mentioned welding tool does not fix the rail car roof cover when welding the rail car roof cover, which causes the rail car roof cover to move during the welding process, thereby affecting the welding quality of the rail car roof cover. Summary of the invention

[0005] The object of the present invention is to provide a welding tool and method for rail vehicle parts, which solves the technical problem that the existing welding tool fails to fix the rail vehicle roof cover when welding the rail vehicle roof cover, causing the rail vehicle roof cover to move during the welding process, thereby affecting the welding quality of the rail vehicle roof cover.

[0006] To achieve the above-mentioned purpose, the present invention provides a welding and processing tool for rail vehicle parts, including a support frame, a conveyor belt, a driving mechanism, a fixing frame, a transmission wheel, a support seat, a fixing mechanism and a processing mechanism. The number of the support frames is two, and the conveyor belt is located between the two support frames. The driving mechanism is used to drive the conveyor belt to move from left to right or from right to left. Both sides of each of the support frames are connected to the fixing frames through a connecting mechanism. A plurality of transmission wheels are rotatably arranged between the two relatively arranged fixing frames. The support seat is arranged on one of the support frames. The fixing mechanism and the processing mechanism are both located below the support seat. The fixing mechanism is used to clamp and fix the rail vehicle roof cover, and the processing mechanism is used to weld the rail vehicle roof cover.

[0007] Wherein, the driving mechanism includes a driving member and a transmission wheel, a plurality of the transmission wheels are rotatably arranged between the two support frames, the conveyor belt is arranged outside all the transmission wheels, and the transmission wheel passes through one of the support frames, and the driving member is used to drive the transmission wheel to rotate.

[0008] Wherein, the connecting mechanism includes a fixed block, a connecting block and a limiting member, the fixed block is arranged on a side of the support frame close to the fixed frame, each of the fixed blocks is removably provided with the connecting block, and each of the fixed blocks is connected to the connecting block via the limiting member.

[0009] Wherein, the processing mechanism includes a longitudinal moving part, a vertical moving part and a laser welding head, the longitudinal moving part is arranged below the support seat, the vertical moving part is connected to the output end of the longitudinal moving part and is located on the side of the longitudinal moving part away from the support seat, and the laser welding head is connected to the output end of the vertical moving part and is located below the vertical moving part.

[0010] Among them, the fixing mechanism includes a lifting part and a fixing plate. There are two lifting parts, which are respectively arranged on the left and right sides of the vertical movable part below the support seat. The fixing plate is connected to the output end of the lifting part and is located below the lifting part.

[0011] A fixed box is arranged below the fixed frame, a universal wheel is movably arranged below the fixed box, the fixed box has a slot, and a support column is slidably arranged in the slot of the fixed box via a moving mechanism.

[0012] The present invention also provides a rail vehicle component welding processing method, comprising the following steps:

[0013] Place the rail vehicle roof cover on the conveyor belt, start the driving unit, drive the first gear to rotate through the driving unit, drive the second gear to rotate, and thus drive the conveying wheel to rotate between the two support frames;

[0014] The conveying wheel rotates between the two support frames, driving the rail vehicle roof cover on the conveyor belt to move from left to right or from right to left between the two support frames;

[0015] When the lateral position of the rail car roof cover to be welded moves to below the laser welding head, the lifting part is started, and the fixing plate is driven up and down by the lifting part to clamp and fix the rail car roof cover;

[0016] After the rail car roof cover is fixed, the vertical moving part is started, and the laser welding head is driven to move vertically by the vertical moving part, and the height of the laser welding head is adjusted to realize welding processing on the rail car roof cover;

[0017] Afterwards, the longitudinal moving part is started, and the laser welding head is driven to move longitudinally by the longitudinal moving part, so that the laser welding head performs welding processing on different longitudinal positions of the rail vehicle roof cover.

[0018] The present invention discloses a welding tool and method for rail vehicle parts. The driving mechanism drives the conveyor belt to move from left to right or from right to left between the two support frames, so that the to-be-welded portion of the rail vehicle roof cover placed on the conveyor belt can be conveyed to the processing mechanism, and then the rail vehicle roof cover is clamped and fixed by the fixing mechanism. After the clamping and fixing, the rail vehicle roof cover is welded by the processing mechanism, so that the rail vehicle roof cover can be prevented from moving during the welding process, which may affect the welding quality of the rail vehicle roof cover. The technical problem that the existing welding tool fails to fix the rail vehicle roof cover during welding, which may cause the rail vehicle roof cover to move during the welding process, thereby affecting the welding quality of the rail vehicle roof cover, is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0020] Figure 1 It is a schematic diagram of the overall structure of the rail vehicle parts welding processing tooling according to the first embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the connection between the vertical moving part and the laser welding head of the first embodiment of the present invention.

[0022] Figure 31 is a schematic cross-sectional view along the lead screw of the first embodiment of the present invention.

[0023] Figure 4 The first embodiment of the present invention Figure 3 Enlarged view of point A.

[0024] Figure 5 It is a cross-sectional schematic diagram along the limiting bolt of the first embodiment of the present invention.

[0025] Figure 6 The first embodiment of the present invention Figure 5 Enlarged view of point B.

[0026] Figure 7 It is a flow chart of the welding process method of rail vehicle parts according to the second embodiment of the present invention.

[0027] In the figure: 101-support frame, 102-conveyor belt, 103-fixed frame, 104-transmission wheel, 105-support seat, 106-transmission wheel, 107-fixed block, 108-connecting block, 109-longitudinal moving part, 110-vertical moving part, 111-laser welding head, 112-lifting part, 113-fixed plate, 114-driving part, 115-first gear, 116-second gear, 117-limiting bolt, 118-limiting nut, 119-fixed box, 120-universal wheel, 121-support column, 122-third gear, 123-screw, 124-fourth gear, 125-rotating rod, 126-rotating handle, 127-support plate, 128-limiting pin. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0029] First embodiment:

[0030] See also Figures 1 to 6 The present invention provides a welding processing tool for rail vehicle parts, including a support frame 101, a conveyor belt 102, a driving mechanism, a fixing frame 103, a transmission wheel 104, a support seat 105, a fixing mechanism and a processing mechanism, the driving mechanism includes a driving member and a transmission wheel 106, the connecting mechanism includes a fixing block 107, a connecting block 108 and a limiter, the processing mechanism includes a longitudinal moving part 109, a vertical moving part 110 and a laser welding head 111, and the fixing mechanism includes a lifting part 112 and a fixing plate 113.

[0031] In this embodiment, the conveyor belt 102 is driven by the driving mechanism to move from left to right or from right to left between the two support frames 101, so that the part to be welded of the rail car roof cover placed on the conveyor belt 102 can be conveyed to the processing mechanism, and then the rail car roof cover is clamped and fixed by the fixing mechanism, and after clamping and fixing, the rail car roof cover is welded by the processing mechanism, thereby avoiding the situation that the movement of the rail car roof cover during the welding process affects the welding quality of the rail car roof cover, and solves the technical problem that the existing welding tooling does not fix the rail car roof cover when welding the rail car roof cover, resulting in the movement of the rail car roof cover during the welding process, thereby affecting the welding quality of the rail car roof cover.

[0032] There are two support frames 101, and the conveyor belt 102 is located between the two support frames 101. The driving mechanism is used to drive the conveyor belt 102 to move from left to right or from right to left. Both sides of each support frame 101 are connected to the fixing frame 103 through a connecting mechanism. A plurality of transmission wheels 104 are rotatably arranged between the two relatively arranged fixing frames 103. The support seat 105 is arranged on one of the support frames 101. The fixing mechanism and the processing mechanism are both located below the support seat 105. The fixing mechanism is used to clamp and fix the rail vehicle roof cover, and the processing mechanism is used to weld the rail vehicle roof cover. By connecting the fixing frames 103 on both sides of the two support frames 101, rail vehicle roof covers of different sizes can be placed on the conveyor belt 102 and the transmission wheel 104.

[0033] Secondly, a plurality of transmission wheels 106 are rotatably arranged between the two support frames 101, the transmission belt 102 is arranged outside all the transmission wheels 106, and the transmission wheel 106 passes through one of the support frames 101, and the driving member is used to drive the transmission wheel 106 to rotate, and the driving member includes a driving part 114, a first gear 115 and a second gear 116, the driving part 114 is arranged outside the support frame 101, and a plurality of first gears 115 are arranged outside the output shaft of the driving part 114, and the number of the first gears 115 and the transmission wheel 106 is the same, and each of the first gears 115 is meshed with the second gear 116, and each of the second gears 116 is arranged on the transmission wheel 106 extends to one side outside the support frame 101. When the driving unit 114 is started, the output shaft of the driving unit 114 will rotate along its own axis, driving the first gear 115 to rotate along its own axis, thereby driving the second gear 116 to rotate along its own axis, and then driving the transmission wheel 106 to rotate along its own axis between the two support frames 101. Through the rotation of the transmission wheel 106 along its own axis between the two support frames 101, the conveyor belt 102 is driven to move from left to right or from right to left between the two support frames 101, thereby driving the rail car roof placed on the conveyor belt 102 to move from left to right or from right to left between the two support frames 101.

[0034] Again, the fixing block 107 is arranged on a side of the support frame 101 close to the fixing frame 103, and the connecting block 108 is detachably arranged in each of the fixing blocks 107. Each of the fixing blocks 107 and the connecting block 108 is connected to each other through the limiting member, and the limiting member includes a limiting bolt 117 and a limiting nut 118. The limiting bolt 117 is detachably connected to the fixing block 107 and the connecting block 108, and passes through the fixing block 107 and the connecting block 108, respectively. The limiting nut 118 is detachably connected to the limiting bolt 117 and is sleeved outside the limiting bolt 117. The interior of the fixed block 107 is a hollow structure, and the connecting block 108 is inserted into the fixed block 107. The fixed block 107 and the connecting block 108 both have through holes. The limiting bolt 117 is inserted into the through holes of the fixed block 107 and the connecting block 108. The limiting bolt 117 has an external thread, and the limiting nut 118 has a threaded hole. The threaded hole of the limiting nut 118 matches the external thread of the limiting bolt 117, and the limiting nut 118 can move outside the limiting bolt 117 along the trajectory of the thread, so that the limiting nut 118 can be tightened or loosened outside the limiting bolt 117.

[0035] At the same time, the longitudinal moving part 109 is arranged below the support seat 105, the vertical moving part 110 is connected to the output end of the longitudinal moving part 109 and is located on the side of the longitudinal moving part 109 away from the support seat 105, the laser welding head 111 is connected to the output end of the vertical moving part 110 and is located below the vertical moving part 110, the output end of the longitudinal moving part 109 is connected to the vertical moving part 110, and drives the vertical moving part 110 to move longitudinally below the support seat 105, the output end of the vertical moving part 110 is connected to the laser welding head 111, and drives the laser welding head 111 to move vertically below the support seat 105.

[0036] In addition, there are two lifting parts 112, which are respectively arranged on the left and right sides of the vertical moving part 110 below the support seat 105. The fixed plate 113 is connected to the output end of the lifting part 112 and is located below the lifting part 112. The output end of the lifting part 112 is connected to the fixed plate 113 and drives the fixed plate 113 to move vertically below the support seat 105.

[0037] In addition, a fixed box 119 is provided below the fixed frame 103, and a universal wheel 120 is movably provided below the fixed box 119. The fixed box 119 has a slot, and a support column 121 is slidably provided in the slot of the fixed box 119 through a moving mechanism. The moving mechanism includes a rotating member, a third gear 122 and a screw rod 123. The screw rod 123 is rotatably provided in the fixed box 119. The rotating member is used to drive the screw rod 123 to rotate in the fixed box 119. The third gear 122 is provided outside the screw rod 123. The rotating member includes a fourth gear 124, a rotating rod 125 and a rotating handle 126. The fourth gear 124 is meshed with the third gear 122 and is located outside the third gear 122 in the fixed box 119. The rotating rod 125 is provided in the fourth gear 124. The gear 124 is located at one side away from the third gear 122 and passes through the fixed box 119. The rotating handle 126 is arranged at one end of the rotating rod 125 away from the fourth gear 124. The rotating handle 126 is held and rotated along the axis of the rotating rod 125 to drive the rotating rod 125 to rotate along its own axis, thereby driving the fourth gear 124 to rotate along its own axis, and then driving the third gear 122 to rotate along its own axis. Through the rotation of the third gear 122 along its own axis, the screw rod 123 is driven to rotate along its own axis in the fixed box 119, thereby driving the support column 121 to slide up and down in the slot of the fixed box 119, so that the support column 121 can be higher or lower than the universal wheel 120.

[0038] Finally, the rotating member also includes a support plate 127 and a limit pin 128. The support plate 127 is arranged on a side of the fixed box 119 close to the rotating handle 126. The limit pin 128 is detachably connected to the support plate 127 and the rotating rod 125, respectively, and passes through the support plate 127 and the rotating rod 125, respectively. The support plate 127 and the rotating rod 125 both have through holes. The limit pin 128 can be inserted into the through holes of the support plate 127 and the rotating rod 125 in turn, so that the rotating rod 125 is limited and fixed and can no longer rotate.

[0039] When using a rail vehicle component welding processing tooling of the present embodiment, it is selected whether to install the fixing frame 103 on the support frame 101 according to the size specifications of the rail vehicle roof cover. If installation is required, the connecting block 108 is inserted into the fixing block 107 at the corresponding position. When the connecting block 108 is fully inserted into the fixing block 107, the through hole of the fixing block 107 will be aligned with the through hole of the connecting block 108. At this time, the limiting bolt 117 is inserted into the through holes of the fixing block 107 and the connecting block 108, and the limiting bolt 117 is inserted from the fixing block 107 to the fixing block 107. The fixing block 107 and the connecting block 108 pass through the through holes, and then the limiting nut 118 is screwed into the passing end of the limiting bolt 117, so that the limiting nut 118 can move along the trajectory of the thread outside the limiting bolt 117, so that the limiting nut 118 can be tightened outside the limiting bolt 117, so that the connecting block 108 can be limited and fixed in the fixing block 107, realizing the connection between the supporting frame 101 and the fixing frame 103, and then the rail car roof covers of different sizes can be placed on the conveyor belt 102 and the transmission wheel 104.

[0040] Afterwards, place the rail vehicle roof cover on the conveyor belt 102 and start the driving unit 114. When the driving unit 114 is started, the output shaft of the driving unit 114 will rotate along its own axis, driving the first gear 115 to rotate along its own axis, thereby driving the second gear 116 to rotate along its own axis, and then driving the conveying wheel 106 to rotate along its own axis between the two support frames 101. Through the rotation of the conveying wheel 106 along its own axis between the two support frames 101, the conveyor belt 102 is driven to move from left to right or from right to left between the two support frames 101, thereby driving the rail vehicle roof cover placed on the conveyor belt 102 to move from left to right or from right to left between the two support frames 101.

[0041] When the lateral position of the rail car roof to be welded moves to below the laser welding head 111, the lifting part 112 is started, so that the power output from the output end of the lifting part 112 drives the fixing plate 113 to move up and down above the conveyor belt 102, so that the fixing plate 113 can clamp and fix the rail car roof placed on the conveyor belt 102. After the rail car roof is fixed, the vertical moving part 110 is started, so that the power output from the output end of the vertical moving part 110 drives the laser welding head 111 to move vertically below the support seat 105, so that the height of the laser welding head 111 can be adjusted to achieve the rail car roof. The top cover is welded, and then the longitudinal moving part 109 is started, so that the power output by the output end of the longitudinal moving part 109 drives the laser welding head 111 to move longitudinally under the support seat 105, so that the laser welding head 111 can perform welding processing on different longitudinal positions of the rail car roof cover, thereby avoiding the situation that the movement of the rail car roof cover during the welding process will affect the welding quality of the rail car roof cover, and solves the technical problem that the existing welding tooling does not fix the rail car roof cover when welding the rail car roof cover, resulting in the movement of the rail car roof cover during the welding process, thereby affecting the welding quality of the rail car roof cover.

[0042] If it is necessary to move the support frame 101, hold the rotating handle 126 and rotate the rotating handle 126 along the axis of the rotating rod 125, so as to drive the rotating rod 125 to rotate along its own axis, thereby driving the fourth gear 124 to rotate along its own axis, and then driving the third gear 122 to rotate along its own axis. Through the rotation of the third gear 122 along its own axis, the screw rod 123 is driven to rotate along its own axis in the fixed box 119, thereby driving the support column 121 to slide up and down in the slot of the fixed box 119, so that the support column 121 can be higher or lower than the universal wheel 120. When the lowest point height of the support column 121 is higher than the lowest point height of the universal wheel 120, When the support column 121 no longer supports the fixed box 119, the universal wheel 120 supports the fixed box 119. At this time, the limit pin 128 is inserted into the through holes of the support plate 127 and the rotating rod 125 in sequence, so that the rotating rod 125 is limited and fixed and can no longer rotate. Then the universal wheel 120 is rotated horizontally and vertically under the fixed box 119, so that the universal wheel 120 can move in the front, back, left and right directions on the ground, thereby driving the support frame 101 to move in the front, back, left and right directions on the ground, and then driving the welding processing tooling to move in the front, back, left and right directions on the ground, so as to move the welding processing tooling to the specified position.

[0043] Second embodiment:

[0044] Based on the first embodiment, please refer to Figure 7 The present invention also provides a rail vehicle parts welding processing method, comprising the following steps:

[0045] S101 , placing the rail vehicle roof cover on the conveyor belt 102 , starting the driving unit 114 , and driving the first gear 115 to rotate through the driving unit 114 , thereby driving the second gear 116 to rotate, thereby driving the conveying wheel 106 to rotate between the two support frames 101 .

[0046] S102 , the conveying wheel 106 rotates between the two support frames 101 , driving the rail vehicle roof cover on the conveyor belt 102 to move from left to right or from right to left between the two support frames 101 .

[0047] Specifically, according to the size specifications of the rail car roof, it is selected whether to install the fixing frame 103 on the support frame 101. If installation is required, the connecting block 108 is inserted into the fixing block 107 at the corresponding position. When the connecting block 108 is fully inserted into the fixing block 107, the through hole of the fixing block 107 will be aligned with the through hole of the connecting block 108. At this time, the limiting bolt 117 is inserted into the through holes of the fixing block 107 and the connecting block 108, and the limiting bolt 117 is inserted from the fixing block 107 and the connecting block 108. The limiting nut 118 is passed through the through hole of the block 108, and then the limiting nut 118 is screwed into the passing end of the limiting bolt 117, so that the limiting nut 118 can move along the trajectory of the thread outside the limiting bolt 117, so that the limiting nut 118 can be tightened outside the limiting bolt 117, so that the connecting block 108 can be limited and fixed in the fixing block 107, realizing the connection between the support frame 101 and the fixing frame 103, and then the rail car roof covers of different sizes can be placed on the conveyor belt 102 and the transmission wheel 104.

[0048] Afterwards, place the rail vehicle roof cover on the conveyor belt 102 and start the driving unit 114. When the driving unit 114 is started, the output shaft of the driving unit 114 will rotate along its own axis, driving the first gear 115 to rotate along its own axis, thereby driving the second gear 116 to rotate along its own axis, and then driving the conveying wheel 106 to rotate along its own axis between the two support frames 101. Through the rotation of the conveying wheel 106 along its own axis between the two support frames 101, the conveyor belt 102 is driven to move from left to right or from right to left between the two support frames 101, thereby driving the rail vehicle roof cover placed on the conveyor belt 102 to move from left to right or from right to left between the two support frames 101.

[0049] S103, when the lateral position of the rail vehicle roof cover to be welded moves to below the laser welding head 111, the lifting part 112 is started, and the fixing plate 113 is driven up and down by the lifting part 112 to clamp and fix the rail vehicle roof cover.

[0050] Specifically, when the lateral position of the rail car roof cover to be welded moves to below the laser welding head 111, the lifting part 112 is started so that the power output from the output end of the lifting part 112 drives the fixing plate 113 to move up and down above the conveyor belt 102, so that the fixing plate 113 can clamp and fix the rail car roof cover placed on the conveyor belt 102.

[0051] S104, after the rail car roof cover is fixed, the vertical moving part 110 is started, the laser welding head 111 is driven to move vertically by the vertical moving part 110, and the height of the laser welding head 111 is adjusted to realize welding processing on the rail car roof cover.

[0052] S105 , then, start the longitudinal moving part 109 , and drive the laser welding head 111 to move longitudinally through the longitudinal moving part 109 , so that the laser welding head 111 performs welding processing on different longitudinal positions of the rail vehicle roof cover.

[0053] Specifically, after the rail car roof cover is fixed, the vertical moving part 110 is started, so that the power output from the output end of the vertical moving part 110 drives the laser welding head 111 to move vertically under the support seat 105, so that the height of the laser welding head 111 can be adjusted to achieve welding processing on the rail car roof cover. After that, the longitudinal moving part 109 is started, so that the power output from the output end of the longitudinal moving part 109 drives the laser welding head 111 to move longitudinally under the support seat 105, so that the laser welding head 111 can perform welding processing on different longitudinal positions of the rail car roof cover, thereby avoiding the situation where the movement of the rail car roof cover during the welding process affects the welding quality of the rail car roof cover, and solves the technical problem that the existing welding tooling does not fix the rail car roof cover when welding the rail car roof cover, resulting in the movement of the rail car roof cover during the welding process, thereby affecting the welding quality of the rail car roof cover.

[0054] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A welding tool for rail vehicle parts, comprising a support frame, characterized in that: It also includes a conveyor belt, a driving mechanism, a fixed frame, a transmission wheel, a support seat, a fixing mechanism and a processing mechanism. There are two support frames, and the conveyor belt is located between the two support frames. The driving mechanism is used to drive the conveyor belt to move from left to right or from right to left. Both sides of each support frame are connected to the fixed frame through a connecting mechanism. A plurality of transmission wheels are rotatably arranged between the two relatively arranged fixed frames. The support seat is arranged on one of the support frames. The fixing mechanism and the processing mechanism are both located below the support seat. The fixing mechanism is used to clamp and fix the rail vehicle roof cover, and the processing mechanism is used to weld the rail vehicle roof cover.

2. The welding tool for rail vehicle parts according to claim 1, characterized in that: The driving mechanism includes a driving member and a transmission wheel. A plurality of the transmission wheels are rotatably arranged between the two support frames. The conveyor belt is arranged outside all the transmission wheels, and the transmission wheel passes through one of the support frames. The driving member is used to drive the transmission wheel to rotate.

3. The welding tool for rail vehicle parts according to claim 1, characterized in that: The connecting mechanism includes a fixed block, a connecting block and a limiting member. The fixed block is arranged outside the support frame on a side close to the fixed frame. The connecting block is removably arranged in each of the fixed blocks, and each of the fixed blocks and the connecting block is connected through the limiting member.

4. The welding tool for rail vehicle parts according to claim 1, characterized in that: The processing mechanism includes a longitudinal moving part, a vertical moving part and a laser welding head. The longitudinal moving part is arranged below the support seat, the vertical moving part is connected to the output end of the longitudinal moving part and is located on the side of the longitudinal moving part away from the support seat, and the laser welding head is connected to the output end of the vertical moving part and is located below the vertical moving part.

5. The welding tool for rail vehicle parts according to claim 4, characterized in that: The fixing mechanism includes a lifting part and a fixing plate. There are two lifting parts, which are respectively arranged on the left and right sides of the vertical moving part below the support seat. The fixing plate is connected to the output end of the lifting part and is located below the lifting part.

6. The welding tool for rail vehicle parts according to claim 1, characterized in that: A fixing box is arranged below the fixing frame, a universal wheel is movably arranged below the fixing box, the fixing box has a slot, and a supporting column is slidably arranged in the slot of the fixing box through a moving mechanism.

7. A rail vehicle component welding method, applied to the rail vehicle component welding tooling according to any one of claims 1 to 6, characterized in that: The following steps are involved: Place the rail vehicle roof cover on the conveyor belt, start the driving unit, drive the first gear to rotate through the driving unit, drive the second gear to rotate, and thus drive the conveying wheel to rotate between the two support frames; The conveying wheel rotates between the two support frames, driving the rail vehicle roof cover on the conveyor belt to move from left to right or from right to left between the two support frames; When the lateral position of the rail car roof cover to be welded moves to below the laser welding head, the lifting part is started, and the fixing plate is driven up and down by the lifting part to clamp and fix the rail car roof cover; After the rail car roof cover is fixed, the vertical moving part is started, and the laser welding head is driven to move vertically by the vertical moving part, and the height of the laser welding head is adjusted to realize welding processing on the rail car roof cover; Afterwards, the longitudinal moving part is started, and the laser welding head is driven to move longitudinally by the longitudinal moving part, so that the laser welding head performs welding processing on different longitudinal positions of the rail vehicle roof cover.

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