Method for determining the position of color-coded stripes on rail vehicle doors and rail vehicle doors

Abstract

This invention discloses a method for determining the position of the color-separation stripe on a rail vehicle door and a rail vehicle door itself. It solves the problem in existing technologies where the color-separation stripe on the vehicle body requires secondary painting. This method achieves rapid positioning of the color-separation stripe on the door without requiring secondary painting of the vehicle body. The specific solution is as follows: A method for determining the position of the color-separation stripe on a rail vehicle door, wherein both the door and the vehicle body use the lower plane of the vehicle body side beam as a positioning reference. The position of the color-separation stripe is determined by determining the height between the lower side of the door and the color-separation stripe. The height between the lower side of the door and the color-separation stripe is equal to the height between the lower plane of the vehicle body side beam and the color-separation stripe on the vehicle body side wall - the height of the vehicle body side beam - the height between the vehicle body doorway and the lower side of the door.

Description

Technical Field

[0001] This invention relates to the field of rail transit, and in particular to a method for determining the position of the color-coded stripe on a rail vehicle door and a rail vehicle door. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In the manufacturing process of rail vehicles, various models have multiple pairs of doors, and the exterior of the car body and doors have multiple color stripes. To ensure the consistency of the color stripes on the exterior of the car body and doors, the current practice is to perform two coating processes. The first coating is applied to the outer skin of the vehicle (without doors), and the dimensions are measured according to the window positioning. After the doors are installed, a second color separation is performed on the vehicle (with doors), ensuring that the door color separation dimensions are consistent with the body color separation dimensions. This painting method can ensure the consistency of the color stripes between the doors and the car body. However, the inventors have discovered the following problems:

[0004] First, the vehicle body needs to be painted twice, which not only occupies painting equipment and workstations multiple times, but also prolongs the manufacturing cycle of the whole vehicle.

[0005] Secondly, during vehicle maintenance or when a door experiences an occasional malfunction, because the color separation stripe of each door is continuous with the color separation stripe of its adjacent body, but cannot be guaranteed to be continuous with the color separation stripe of all bodies, it is impossible to arbitrarily interchange painted doors. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the first objective of the present invention is to provide a method for determining the position of the color separation strip on the door of a rail vehicle, so as to realize the rapid positioning of the color separation strip on the door and facilitate the painting of the door.

[0007] The second objective of this invention is to provide a rail vehicle door that ensures the consistency of the color stripe on the vehicle body and the door, thereby achieving interchangeability of all train doors.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0009] A method for determining the position of the color-separation strip on a rail vehicle door is provided. The position of the color-separation strip is determined by using the lower plane of the car body side beam as the positioning reference for both the door and the side wall of the rail vehicle. The height between the lower side of the door and the color-separation strip is calculated as follows: Height between the lower plane of the car body side beam and the color-separation strip on the side wall of the car body - Height of the car body side beam - Height between the doorway and the lower side of the door.

[0010] In the aforementioned method for determining the color separation positioning reference of the car door, the position of the color separation strip is determined by determining the height between the lower side of the car door and the color separation strip, thus determining the painting area of ​​the color separation strip. Specifically, this is calculated by subtracting the height of the color separation strip between the body side beam and the side wall of the car body from the height of the body side beam and the height between the car door and the lower side of the car door. After obtaining the height, the color separation strip of the car door is painted by measurement. Since the heights between the body side beam and the side wall of the car body, the height of the body side beam, and the height between the car door and the lower side of the car door are all fixed, the positions of all the color separation strips of the car doors are naturally the same. This eliminates the need for secondary painting of the car body after the car door is installed and also allows for the interchangeability of car doors.

[0011] In the above-described method for determining the position of the color-separation strip on a rail vehicle door, for ease of measurement, the lower side of the door refers to the bottom side of the door, and the color-separation strip refers to the lower line of the color-separation strip. Once the lower line of the color-separation strip is determined, the upper line of the color-separation strip is naturally determined as well.

[0012] The height between the vehicle doorway and the bottom of the door refers to the door clearance.

[0013] As described above, in the method for determining the position of the color-separation strip on a rail vehicle door, the car body side beam refers to the side beam of the car body underframe. The side beam of the car body underframe is located on the underside of the car body, and its lower surface is relatively flat, making it easy to obtain an accurate value of the height between the side beam and the color-separation strip on the side wall of the car body. The statement that the rail vehicle door and the side wall of the car body both use the side beam as the positioning reference for their respective color-separation strips means that the rail vehicle door and the side wall of the car body both use the lower surface of the side beam of the car body underframe as the positioning reference for their respective color-separation strips.

[0014] The vehicle doorway refers to the upper plane of the side beam of the vehicle chassis.

[0015] As described above, in the method for determining the position of the color-blocking stripe on the door of a rail vehicle, considering the relatively long vehicle body, in order to ensure that the color-blocking stripe on the side wall of the vehicle body and the color-blocking stripe on the door are at the same height, the height error of the side beam of the vehicle body needs to be controlled. The control method includes the following:

[0016] The material of the vehicle body side beam is an irregular profile. Part of the cavity of the irregular profile is removed to obtain the lower surface of the vehicle body door.

[0017] The vehicle body side beam is fixed to the bottom platform by positioning and clamping components. The processing equipment then processes the vehicle body side beam to ensure processing accuracy and achieve consistency in the overall height of the vehicle body side beam.

[0018] The method for determining the position of the color-separation strip on a rail vehicle door, as described above, controls the height error between the color-separation strip on the vehicle body side beam and the vehicle body side wall by controlling the height error of the vehicle body side wall. The control method includes the following:

[0019] The side wall of the vehicle body consists of multiple profiles. By controlling the tolerance of individual profiles, the tolerance of profile assembly, the welding gap of profiles, and the welding shrinkage and deformation, the error of the height of the side wall of the vehicle body can be controlled. By controlling the error of the height of the side wall of the vehicle body, the height error between the side beam of the vehicle body and the color separation strip of the side wall of the vehicle body is guaranteed to be within an appropriate range.

[0020] As described above, in the method for determining the position of the color-blocking strip on the door of a rail vehicle, during the welding process of multiple profiles on the side wall of the vehicle body, a conforming fixture for the vehicle body is set on the inner side of the side wall of the vehicle body. The conforming fixture supports the side wall of the vehicle body to achieve error control of the height of the side wall of the vehicle body. By setting the conforming fixture, it is also possible to ensure that the height error of the door of the vehicle body is within an appropriate range.

[0021] As described above, in the method for determining the position of the color-separation strip on a rail vehicle door, the tolerance of a single profile piece is less than or equal to 1 mm, the tolerance of profile assembly is less than or equal to 3 mm, the gap between profile welds is less than or equal to 0.5 mm, and the welding shrinkage deformation is less than or equal to 2 mm.

[0022] In the method for determining the position of the color-separation strip on the door of a rail vehicle as described above, the height error between the color-separation strip on the side beam of the car body and the side wall of the car body is controlled by adjusting the height error of the side beam of the car body.

[0023] In the method for determining the position of the color-blocking strip on a rail vehicle door as described above, the height error between the doorway and the lower side of the door needs to be controlled. The control method includes controlling the height of the doorway, and the control method includes the following:

[0024] By using some struts to support the vehicle body between the underframe and the upper side wall, and some struts to support the side walls on both sides of the vehicle body, the width and diagonal length of the vehicle body are controlled to avoid the door height exceeding the tolerance caused by the tilt of the side walls;

[0025] Anti-deformation is set before welding the side walls of the vehicle body to counteract the heat deformation during welding, thereby controlling the tolerance.

[0026] As described above, in the method for determining the position of the color-separated strip on a rail vehicle door, the height error between the doorway and the lower side of the door needs to be controlled. The control method includes controlling the height error of the door, which includes setting an anti-deformation feature before welding the door.

[0027] Secondly, the present invention provides a rail vehicle door, employing the aforementioned method for determining the position of the color-blocking strip on a rail vehicle door.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1) In the method for determining the color separation positioning reference of the car door provided by the present invention, the position of the color separation strip of the car door is determined by determining the height between the lower side of the car door and the color separation strip of the car door, thereby determining the painting area of ​​the color separation strip. Specifically, it is calculated by subtracting the height of the color separation strip between the car body side beam and the car body side wall from the height of the car body side beam and the height between the car body door and the lower side of the car door. After obtaining the height, the color separation strip of the car door is painted by measurement. Since the height between the car body side beam and the car body side wall, the height of the car body side beam, and the height between the car body door and the lower side of the car door are all fixed, the position of all the color separation strips of the car door is naturally the same. The car door can be painted before the car door is installed, eliminating the need for secondary painting of the car body after the car door is installed. This frees up painting equipment and workstations, eliminates the need for secondary protection of the car body, saves labor time, shortens the painting cycle of the whole vehicle, and increases production.

[0030] 2) In this invention, both the door color separation and the body color separation are positioned on the lower plane of the side beam of the body frame. This fixes the door color separation size and ensures the consistency of the body color separation strip and the door. It can achieve the interchangeability of all train doors and eliminates the need for secondary color separation after the body color separation and door installation, thus simplifying the painting process.

[0031] 3) By controlling the error of the vehicle side beam height, this invention can ensure that the side beam height of the vehicle body is uniform and consistent, and realize uniform measurement and positioning starting from the lower plane of the side beam of the vehicle body, thus ensuring the consistency of the color separation strips between the vehicle body and the door.

[0032] 4) This invention controls the tolerance of individual profiles and sets up conformal tooling to control the error of the height of the side wall of the vehicle body side beam. This helps to control the error of the height between the lower plane of the side beam and the color separation strip of the side wall of the vehicle body, ensuring that the error of the height between the lower plane of the side beam and the color separation strip of the side wall of the vehicle body is within an appropriate range.

[0033] 5) This invention uses struts between the vehicle body chassis and the upper side wall, and between the two side walls of the vehicle body, to counteract the welding heat deformation before welding the side walls, thereby controlling the height error between the vehicle body door and the lower side of the door and ensuring that the error of all door gaps is within the set range.

[0034] 6) The present invention sets up anti-deformation before welding at the vehicle door to ensure that the height error of all vehicle door is within the set range, which is more conducive to the error control of the door gap. Attached Figure Description

[0035] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0036] Figure 1This is a schematic diagram of a large-size data acquisition system for a rail vehicle body according to one or more embodiments of the present invention.

[0037] Figure 2 This is a schematic diagram of a positioning and clamping component in a large-size data acquisition system for a rail vehicle body according to one or more embodiments of the present invention.

[0038] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0039] The components include: 1. Car door, 2. Car body side wall, 3. Pressing robotic arm, 4. Processing surface, 5. Conformal positioning component, 6. Bottom platform, and 7. Slide. Detailed Implementation

[0040] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] As described in the background section, there is a problem in the prior art that the doors of rail vehicles need to be painted simultaneously with the vehicle body after installation. In order to solve the above technical problem, the present invention proposes a method for determining the position of the color separation strip on the doors of rail vehicles.

[0043] Example 1

[0044] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a method for determining the position of the color-separation stripe on a rail vehicle door is described. Both the door 1 and the side wall 2 of the rail vehicle use the lower plane of the side beam of the car body as the positioning reference for their respective color-separation stripes. The color-separation stripe of the door is determined by measuring the height between the lower side of the door 1 and the door color-separation stripe. The height H2 between the lower side of the door 1 and the door color-separation stripe is equal to the height H1 between the lower plane of the side beam of the car body and the color-separation stripe of the side wall of the car body, minus the height H of the side beam of the car body. 边梁 - Height H between the vehicle doorway and the bottom of the door 门间隙 After determining the height between the lower side of the car door and the door color separation strip, measure from the lower side of the car door and draw a line after measurement. This line serves as the starting line of the door color separation strip, and then determine the ending line of the door color separation strip based on its height.

[0045] For ease of measurement, the lower side of door 1 refers to the bottom side of the door, and the door color separation strip refers to the lower line of the door color separation strip (the starting line of the door color separation strip). Once the lower line of the door color separation strip is determined, the upper line of the door color separation strip is naturally determined as well. The height between the doorway and the lower side of the door refers to the door gap.

[0046] Understandably, the body side beam refers to the body underframe side beam. The body underframe side beam is located on the underside of the body, and the lower surface of the body underframe side beam is relatively flat, making it easy to obtain an accurate value of the height between the body side beam and the color separation strip on the side wall of the body.

[0047] In this embodiment, the fact that the door 1 and the side wall 2 of the rail vehicle use the side beam of the car body as the positioning reference for their respective color-separation zones means that the door 1 and the side wall 2 of the rail vehicle use the lower plane of the side beam of the car body frame as the positioning reference for their respective color-separation zones.

[0048] The vehicle doorway refers to the upper surface of the side beam of the vehicle chassis.

[0049] Considering the relatively long vehicle body, to ensure that the two color-separation strips on the side walls and the door color-separation strips are at the same height and to achieve continuous consistency in color separation, firstly, the height error of the vehicle body side beams needs to be controlled. This ensures that the height of the side beams is uniform. When color-separating the side walls, the lower plane of the side beams is used as the measurement and positioning reference to ensure that the dimensions of all side walls are consistent. The control methods include the following:

[0050] Specifically, the material of the vehicle body side beam is an irregular profile, and the lower surface of the vehicle body door is obtained by removing part of the cavity of the irregular profile;

[0051] The side beam 8 of the vehicle body is supported by the conformal positioning component 5, and then the side beam 8 of the vehicle body is fixed to the bottom platform 6 by the positioning and clamping component. The part of the side beam with cavity removal forms a machining surface 4, which is precision machined by the machining equipment to ensure machining accuracy of 0.5mm and achieve the consistency of the overall height of the side beam of the vehicle body.

[0052] It needs to be explained that, reference Figure 2As shown, the bottom platform 6 has multiple grooves 7 along its length, each groove 7 being an inverted T-shaped groove; the conformal positioning member 5 is used to support the side beam of the vehicle body. The shape of the conformal positioning member 5 is adapted to the shape of the side beam of the vehicle body. The longitudinal section of the conformal positioning member 5 is U-shaped. The U-shaped conformal positioning member 5 accommodates the bottom side of the side beam of the vehicle body. The inner shape of the U-shaped conformal positioning member 5 fits the outer side of the side beam of the vehicle body. One side of the conformal positioning member 5 is higher than the other side. The lower side of the conformal positioning member 5 is located on the outer side of the side beam of the vehicle body. The higher side of the conformal positioning member 5 is located below the horizontal section of the side beam of the vehicle body. A positioning post is set at the bottom of the higher side of the conformal positioning member 5. The positioning post can be inserted into the groove 7.

[0053] The positioning and clamping component includes several clamping robotic arms 3. Each clamping robotic arm 3 includes a first piece 3-1, a second piece 3-2, and a positioning bolt 3-3. The first piece 3-1 is plate-shaped with a step on its lower side. The shape of the first piece matches the shape of the lower side of the conformal positioning component. One end of the first piece abuts against the side beam 8 of the vehicle body. The second piece 3-2 is L-shaped. The vertical section of the second piece 3-2 is supported on the bottom platform 6, and the horizontal section of the second piece 3-2 supports the first piece. One side of the second piece abuts against the outer side of the lower side of the conformal positioning component. The positioning bolt 3-3 passes through the second piece 3-2 and is inserted into another groove 7. A nut is provided to lock the positioning bolt 3-3. The clamping robotic arm 3 clamps the side beam of the vehicle body and the conformal positioning component onto the bottom platform 6.

[0054] Secondly, the height error between the body side beam and the color separation strip of the body side wall can be controlled to ensure the consistency of the color separation of all body side walls. The control methods include the following:

[0055] The vehicle body sidewall consists of multiple profiles, which are welded together to form the sidewall. By controlling the tolerances of individual profiles, the tolerances of profile assembly, the welding gaps, and the anti-deformation of welding shrinkage, the error control of the height of the vehicle body sidewall is achieved. By controlling the error of the height of the vehicle body sidewall, the height error between the side beams and the color separation strips of the sidewall is ensured to be within an appropriate range, thus ensuring the continuity and consistency of the color separation strips of all the sidewalls on both sides of the door.

[0056] Furthermore, during the welding process of multiple profiles on the side wall of the vehicle body, a conforming fixture is set on the inside of the side wall to position, support, and fix the side wall, thereby controlling the height error of the side wall. Automatic welding is used during the welding of the side wall to avoid twisting and deformation caused by unstable welding heat input. The conforming fixture also ensures that the height error of the doorway is within an appropriate range.

[0057] Understandably, the conformal tooling is determined based on the outer contour shape of the vehicle body, the number of welds, and the size of the radius of curvature. The conformal tooling is existing technology. After the conformal tooling is removed, it is supported by diagonal bracing rods between the vehicle body underframe and the upper part of the vehicle body sidewall, and transverse bracing rods are supported between the arcs of the vehicle body sidewalls on both sides, which can further ensure that the height error of the vehicle body sidewall is within the set range.

[0058] Specifically, the tolerance of a single profile for the side wall of the vehicle body is less than or equal to 1 mm, the tolerance of profile assembly is less than or equal to 3 mm, the gap between profile welding is less than or equal to 0.5 mm, and the welding shrinkage deformation is less than or equal to 2 mm.

[0059] It should also be added that the height error between the body side beam and the color separation strip of the body side wall can be controlled by controlling the height error of the body side beam.

[0060] Finally, the height error between the vehicle doorway and the lower side of the door needs to be controlled. The control method includes controlling the height of the doorway, with a height error of ±3mm. The control methods include the following:

[0061] The vehicle body is supported by diagonal bracing rods between the chassis and the upper part of the side wall, and transverse bracing rods are supported between the arcs of the side walls on both sides of the vehicle body. This controls the width and diagonal length of the vehicle body to avoid the door height exceeding the tolerance caused by the tilt of the side wall. The bottom of the side wall is fixed to the chassis, and the upper and middle parts are rigidly fixed by diagonal bracing rods and transverse bracing rods, thus enabling accurate control of tolerances.

[0062] Furthermore, because the vehicle body will deform due to heat after welding, it is necessary to set up anti-deformation before welding the side walls of the vehicle body. Anti-deformation refers to the process of predicting the direction and amount of welding deformation and restraining the side walls of the vehicle body in the opposite direction in advance by using diagonal braces and transverse braces to counteract the welding heat deformation and thus control the tolerance.

[0063] It should also be added that the aforementioned method of controlling the height of the vehicle body sidewalls can further ensure the control of the height of the vehicle body door.

[0064] In addition, it is easy to understand that in order to control the height error between the doorway and the bottom of the door, the control method also includes controlling the height error of the door. The control method includes setting anti-deformation before door welding; and door welding needs to be automated to avoid twisting and deformation caused by unstable welding heat input.

[0065] In summary, by combining dimensional chain analysis and management, the accuracy of components is ensured by controlling the precision of profile raw materials, setting conformal tooling, and high-precision machining; the accuracy of assembly and welding between components is ensured by setting anti-deformation welding of the vehicle body sidewalls through rigid constraints of struts and adopting automatic welding of the vehicle body sidewalls, thereby controlling the height of the vehicle body sidewalls within an appropriate range and further ensuring the consistency of the vehicle body door and meeting the requirement of consistent color separation of all vehicle body sidewalls.

[0066] In the door color-separation positioning reference determination method provided in this embodiment, the painting start line of the door color-separation strip is confirmed by determining the height between the lower side of the door and the door color-separation strip. Specifically, it is calculated by subtracting the height of the side beam from the height of the side beam and the lower side of the door from the height of the door door. After obtaining the height, the door color-separation strip is painted by measurement. Since the heights of the side beam and the side wall, the side beam, and the door door and the lower side of the door are all fixed, the positions of all door color-separation strips are the same. There is no need to repaint the car body after the door is installed, which ensures the consistency of the exterior door and the side wall color-separation strip of the rail transit vehicle and realizes the interchangeability of the entire train doors.

[0067] Example 2

[0068] This embodiment provides a rail vehicle door, employing the rail vehicle door color-blocking strip position determination method described in Embodiment 1. Both the door color-blocking and the car body color-blocking are positioned using the side beams of the car body underframe. This solidifies the door color-blocking dimensions and ensures the consistency between the car body color-blocking strips and the doors, enabling the interchangeability of all train doors. In the event of occasional door failures during vehicle maintenance or repairs, it can meet the need for rapid door replacement in rail vehicles.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for determining the position of the color-coded stripe on a rail vehicle door, characterized in that, The doors and side walls of rail vehicles use the lower plane of the side beam of the car body as the positioning reference for their respective color-separation strips. The position of the door color-separation strip is determined by determining the height between the lower side of the door and the door color-separation strip. The height between the lower side of the door and the door color-separation strip = the height between the lower plane of the side beam of the car body and the color-separation strip of the side wall of the car body - the height of the side beam of the car body - the height between the doorway of the car body and the lower side of the door. The lower side of the door refers to the bottom side of the door; the color-separation strip of the door refers to the lower line of the color-separation strip of the door; the side beam of the car body refers to the side beam of the car body frame; the fact that the door and the side wall of the rail vehicle use the side beam of the car body as the positioning reference for their respective color-separation strips means that the door and the side wall of the rail vehicle use the lower plane of the side beam of the car body frame as the positioning reference for their respective color-separation strips; the doorway of the car body refers to the upper plane of the side beam of the car body frame; the height between the doorway of the car body and the lower side of the door refers to the door gap.

2. The method for determining the position of the color-coded stripe on a rail vehicle door according to claim 1, characterized in that, The height error of the vehicle body side beam needs to be controlled, and the control methods include the following: The material of the vehicle body side beam is an irregular profile. Part of the cavity of the irregular profile is removed to obtain the lower surface of the vehicle body door. The vehicle body side beam is fixed to the bottom platform by positioning and clamping components, and the vehicle body side beam is processed by processing equipment.

3. The method for determining the position of the color-coded stripe on a rail vehicle door according to claim 1, characterized in that, The height error between the vehicle body side beam and the color-blocked stripe on the vehicle body side wall is controlled by adjusting the height error of the vehicle body side wall. The control method includes the following: The side wall of the vehicle body consists of multiple profiles. By controlling the tolerance of individual profiles, the tolerance of profile assembly, the welding gap of profiles, and the welding shrinkage and deformation, the error control of the height of the side wall of the vehicle body can be achieved.

4. The method for determining the position of the color-blocking strip on a rail vehicle door according to claim 3, characterized in that, During the welding process of multiple profiles of the vehicle body side wall, a conforming tooling is set on the inside of the vehicle body side wall to support the vehicle body side wall and thus achieve error control of the height of the vehicle body side wall.

5. The method for determining the position of the color-blocking strip on a rail vehicle door according to claim 3, characterized in that, The tolerance of a single profile piece is less than or equal to 1 mm, the tolerance of a profile assembly is less than or equal to 3 mm, the gap between profile welds is less than or equal to 0.5 mm, and the welding shrinkage deformation is less than or equal to 2 mm.

6. The method for determining the position of the color-coded stripe on a rail vehicle door according to claim 1, characterized in that, The height error between the vehicle body side beam and the color-separation strip on the vehicle body side wall is controlled by adjusting the height error of the vehicle body side beam.

7. The method for determining the position of the color-coded stripe on a rail vehicle door according to claim 1, characterized in that, The height error between the vehicle doorway and the lower side of the door needs to be controlled. The control method includes controlling the height of the doorway, and the control method includes the following: By using some struts to support the vehicle body between the underframe and the upper side wall, and some struts to support the side walls on both sides of the vehicle body, the width and diagonal length of the vehicle body are controlled to avoid the door height exceeding the tolerance caused by the tilt of the side walls; Anti-deformation is set before welding the side walls of the vehicle body.

8. The method for determining the position of the color-blocking strip on a rail vehicle door according to claim 1, characterized in that, The height error between the vehicle body door and the lower side of the door needs to be controlled. The control method includes controlling the height error of the door, which includes setting anti-deformation before welding the door.

9. A rail vehicle door, characterized in that, The method for determining the position of the color-blocking strip on the door of a rail vehicle, as described in any one of claims 1-8.

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