A door corner fitting welding device

Abstract

This invention relates to a welding device for door corner repair components, comprising: a base assembly, installed at the corner of the base frame side beam and the door pillar, simultaneously engaging with the base frame side beam and the door pillar; a gap control assembly, used to control the gap between the root of the welding bevel of the two right-angled sides of the door corner repair component and the welding surfaces of the door pillar and the base frame side beam; and a positioning control assembly, used to control the installation position of the door corner repair component in the vehicle length and height directions; both the gap control assembly and the positioning control assembly are mounted on the base assembly. This invention can ensure the positioning accuracy of the door corner repair component, enhance its reinforcing effect, and simultaneously inspect the installation dimensions of the completed door corner repair component, achieving full-process assurance of the assembly, welding, and inspection of the door corner repair component, thereby improving welding quality.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle manufacturing technology, and in particular to a welding device for door corner components. Background Technology

[0002] During the manufacturing process of railcars, the structural area between the underframe side beams and door columns is relatively weak and is a stress concentration area. Generally, additional reinforcement structures need to be welded to improve the overall structural strength of the car, and door corner reinforcement components have emerged to meet this need.

[0003] Patent No. 201821525464.4 discloses a door corner reinforcement structure, including a corner plate and a reinforcing plate. The corner plate has a first right-angle side and a second right-angle side. The first right-angle side is used to weld to the bottom beam of the door frame structure, and the second right-angle side is used to weld to the door post of the door frame structure. There are two corner plates, which are spaced apart along the thickness direction of the door frame structure. The two sides of the reinforcing plate are welded to the two oblique sides of the two corner plates respectively.

[0004] The aforementioned door corner reinforcement structure is an overall triangular wedge shape. To truly achieve its reinforcing effect, high standards are required for the positioning accuracy and welding quality of the door corner reinforcement components. Because the lateral positioning dimension of the door corner reinforcement needs to cross the R-arc at the connection between the door post and the base frame side beam, it is difficult to guarantee positioning accuracy using a ruler, and the finished dimensions are difficult to measure. Furthermore, the weld at the connection between the door corner reinforcement and the door post and base frame side beam is a single-sided weld with double-sided forming. Due to spatial constraints, the root gap is difficult to adjust precisely, making it impossible to guarantee full weld penetration. Summary of the Invention

[0005] The main technical problem solved by this invention is to provide a welding device for door corner repair components, which can be used for the assembly, welding and dimensional inspection of door corner repair components after completion. This is beneficial to significantly improve the positioning accuracy and welding quality of door corner repair components and enhance their reinforcing function.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A door corner patch assembly welding device, comprising:

[0008] The base assembly is installed at the corner of the base frame side beam and the door post, and is simultaneously attached to the base frame side beam and the door post;

[0009] The clearance control assembly is used to control the clearance between the root of the welding bevel of the two right-angled surfaces of the door corner and the welding surfaces of the door column and the base frame side beam.

[0010] The positioning control assembly is used to control the installation position of the door corner supplement assembly in the vehicle length and height directions;

[0011] Both the clearance control assembly and the positioning control assembly are mounted on the base assembly.

[0012] Furthermore, the gap control assembly includes two sets, one set of which is used to control the gap between the root of the welding bevel of the right-angled surface formed by the door corner and the welding surface of the door pillar, and the other set of which is used to control the gap between the root of the welding bevel of the other right-angled surface formed by the door corner and the welding surface of the base frame side beam.

[0013] Furthermore, the gap control assembly includes a support frame, a gap diaphragm, and a gap diaphragm adjustment mechanism. The support frame is fixed on the base assembly. The gap diaphragm adjustment mechanism is connected to the gap diaphragm and drives the gap diaphragm to move along the vehicle height direction or the vehicle length direction. The gap diaphragm has a portion extending in the direction of the door corner assembly. The gap diaphragm is parallel to the welding surface of the corresponding door pillar or the side beam of the base frame. The root of the welding bevel of the door corner assembly is attached to the gap diaphragm.

[0014] Furthermore, the positioning control assembly includes a positioning diaphragm and a positioning diaphragm adjustment mechanism. The positioning diaphragm adjustment mechanism is fixed on the base assembly. The positioning diaphragm adjustment mechanism is connected to the positioning diaphragm and drives the positioning diaphragm to move along the vehicle width direction. The positioning diaphragm is perpendicular to the welding surface of the door pillar and the underframe side beam. The outer surface formed by the door corner is attached to the positioning diaphragm.

[0015] Furthermore, the positioning diaphragm has a right-angled structure.

[0016] Furthermore, the diaphragm adjustment mechanism includes a housing, a worm gear, a worm wheel, a gear set, and a rack. The gear set consists of a meshing pinion and a large gear. The worm wheel meshes with the worm gear set. The pinion and the worm wheel are coaxially and fixedly connected. The large gear meshes with the rack. The rack is fixedly connected to the diaphragm via a push rod. Rotating the worm gear causes the diaphragm to move. The worm gear, worm wheel, gear set, and rack are installed inside the housing. The housing is fixed to the outside of the support frame or directly fixed to the base assembly.

[0017] Furthermore, the diaphragm adjustment mechanism also includes at least two guide rods, one end of which is fixedly connected to the diaphragm, and the guide rod is simultaneously slidably connected to the support frame or base assembly.

[0018] Furthermore, a dial is integrated on the large gear, and a corresponding visual reading window is opened on the housing.

[0019] Furthermore, the base assembly includes a right-angled L-shaped base plate. On the two right-angled sides of the inner side of the base plate, there are positioning plates that are bent perpendicularly to the direction of the door corner assembly and mounting plates that protrude away from the direction of the door corner assembly. The gap control assembly and the positioning control assembly are both mounted on the mounting plates. After installation, the two planes of the base plate are respectively attached to the outer surfaces of the base frame side beam and the door pillar, and the two positioning plates are respectively attached to the welding surfaces of the base frame side beam and the door pillar.

[0020] Furthermore, the mounting plate has a right-angled L-shaped cross section, formed by bending the right-angled side of the substrate vertically outward and then vertically upward. The gap control assembly is fixedly installed on the first surface perpendicular to the substrate, and the positioning control assembly is installed on the second surface parallel to the substrate. The first surface is flush with the welding surface of the corresponding door post or base frame side beam.

[0021] In summary, the door corner fitting welding device provided by this invention has the following advantages compared with the prior art:

[0022] (1) This invention simulates the interface relationship between the door corner assembly and the vehicle body. Through the cooperation of the base assembly, the gap control assembly and the positioning control assembly, the precise positioning of the door corner assembly in the vehicle length direction and the vehicle height direction is realized, as well as the precise control of the gap at the root of the welding bevel of the door corner assembly, which improves the welding quality of the door corner assembly and further enhances the reinforcing effect of the door corner assembly.

[0023] (2) This invention can ensure the entire process of assembly, welding and inspection of door corner components by using one device, realize the precision manufacturing of welding, and solve the problems of difficult positioning of stainless steel rail vehicle door corner components, difficulty in ensuring root gap, inability to melt through single-sided welding and double-sided forming, and inconvenience in measuring dimensions after completion.

[0024] (3) The device is simple and convenient to operate, and can achieve rapid and accurate positioning, which is conducive to greatly improving the efficiency of welding operations. Attached Figure Description

[0025] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the door corner supplement of the present invention;

[0027] Figure 2 This is a schematic diagram illustrating the working principle of the welding device of the present invention;

[0028] Figure 3 This is a schematic diagram of the welding device structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the clearance control assembly of the present invention;

[0030] Figure 5 yes Figure 4 A magnified view of a portion of the image;

[0031] Figure 6 This is a schematic diagram of the positioning control assembly of the present invention.

[0032] like Figures 1 to 6 As shown, the base frame side beam 1 and the door pillar 2;

[0033] The door corner is composed of 3, the first right-angled surface 31, the second right-angled surface 32, and the curved surface 33;

[0034] Base assembly 4, base plate 41, first positioning plate 42, second positioning plate 43, first mounting plate 44, second mounting plate 45, first surface 46, second surface 47, reinforcing rib plate 48;

[0035] Clearance control assembly 5, support frame 51, clearance diaphragm 52, clearance diaphragm adjustment mechanism 53, housing 531, worm 532, worm wheel 533, pinion 534, gear 535, rack 536, push rod 537, guide rod 54, dial 55;

[0036] Positioning control assembly 6, positioning diaphragm 61, positioning diaphragm adjustment mechanism 62, housing 621, worm gear 622, worm wheel 623, pinion 624, gear 625, rack 626, push rod 627, guide rod 63, dial 64;

[0037] Surface 7, welded surface 8.

[0038] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0040] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] like Figures 1 to 3 As shown, the present invention provides a door corner patch assembly welding device for welding a door corner patch assembly 3 at the corner connection between the base frame side beam 1 and the door post 2. The door corner patch assembly 3 has a triangular wedge-shaped structure and consists of two right-angled surfaces and a curved surface, namely a first right-angled surface 31, a second right-angled surface 32, and a curved surface 33. The first right-angled surface 31 is welded to the base frame side beam 1, and the second right-angled surface 32 is welded to the door post 2.

[0043] The door corner welding device provided in this embodiment includes: a base assembly 4, a gap control assembly 5, and a positioning control assembly 6.

[0044] The base assembly 4 is installed at the corner of the base frame side beam 1 and the door pillar 2, and is simultaneously attached to the base frame side beam 1 and the door pillar 2, serving as the positioning reference between the device and the base frame side beam 1 and the door pillar 2.

[0045] The gap control assembly 5 is installed on the base assembly 4 and is used to control the gap between the welding groove root of the first right angle surface 31 and the second right angle surface 32 of the door corner supplement assembly 3 and the welding surface 8 of the corresponding base frame side beam 1 and door column 2. This is to achieve precise control of the gap at the welding groove root, thereby improving the welding quality of the single-sided welding and double-sided forming of the door corner supplement assembly 3 and enhancing the reinforcing effect of the door corner supplement assembly 3.

[0046] The positioning control assembly 6 is mounted on the base assembly 4 and is used to control the installation position of the door corner supplement assembly 3 in the vehicle length and height directions, so as to achieve precise positioning of the door corner supplement assembly 3 in the vehicle length and height directions and avoid the door corner supplement assembly 3 from being misaligned during installation.

[0047] Specifically, in this embodiment, the base assembly 4 has a right-angled L-shaped structure, which matches the structure at the corner connection of the underframe side beam 1 and the door pillar 2. The base assembly 4 includes a right-angled L-shaped base plate 41. On the two right-angled sides of the inner side of the base plate 41, there are positioning plates that are bent vertically towards the door corner assembly 3, namely the first positioning plate 42 and the second positioning plate 43. During welding, the two planes of the base plate 41 are respectively attached to the outer surface 7 of the underframe side beam 1 and the door pillar 2. The first positioning plate 42 is attached to the welding surface 8 of the underframe side beam 1, and the second positioning plate 43 is attached to the welding surface 8 of the door pillar 2.

[0048] To facilitate the installation of the gap control assembly 5 and the positioning control assembly 6, the first positioning plate 42 and the second positioning plate 43 are respectively disposed at the outer ends of the two right-angled sides of the base plate 41.

[0049] In this embodiment, in order to install the gap control assembly 5 and the positioning control assembly 6, mounting plates protruding in the direction away from the door corner supplement assembly 3 are respectively provided on the two right-angled sides of the substrate 41. These are the first mounting plate 44 and the second mounting plate 45. The first mounting plate 44 and the second mounting plate 45 are connected at the corner of the substrate 41. A set of gap control assemblies 5 is installed on the first mounting plate 44 and the second mounting plate 45 respectively. The positioning control assembly 6 can be installed on the first mounting plate 44 or the second mounting plate 45 as needed.

[0050] Further preferably, both the first mounting plate 44 and the second mounting plate 45 have right-angled L-shaped cross-sections, protruding from the right-angled side of the inner side of the base plate 41 in a direction away from the door corner assembly 3, formed by bending the right-angled side vertically outward and then vertically upward. The gap control assembly 5 is fixedly mounted on the first surface 46 perpendicular to the base plate 41, and the positioning control assembly 6 is mounted on the second surface 47 parallel to the base plate 41. The first surface 46 of the first mounting plate 44 is flush with the welding surface 8 of the corresponding base frame side beam 1, and the first surface 46 of the second mounting plate 45 is flush with the welding surface 8 of the corresponding door pillar 2.

[0051] Before welding, the base assembly 4 is installed at the corner of the base frame side beam 1 and the door pillar 2. The two right-angled planes of the base plate 41 are respectively attached to the surface 7 of the base frame side beam 1 and the door pillar 2. At the same time, the first positioning plate 42 and the second positioning plate 43 are attached to the corresponding welding surface 8 of the base frame side beam 1 and the door pillar 2. The installation of the base assembly 4 is flexible and convenient, and one person can complete the operation.

[0052] In this embodiment, preferably, the entire base assembly 4 can be formed by bending a stainless steel plate in one piece, or it can be formed by processing aluminum or aluminum alloy in one piece, in order to reduce weight, achieve lightweighting, and facilitate one-handed operation by the operator.

[0053] like Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the gap control assembly 5 includes two sets. The two sets of gap control assemblies 5 have the same structure and are respectively installed on the first mounting plate 44 and the second mounting plate 45 of the base assembly 4. One set of gap control assemblies 5 installed on the first mounting plate 44 is used to control the gap between the root of the welding bevel of the first right angle surface 31 of the door corner supplement assemblies 3 and the welding surface 8 of the bottom frame side beam 1. The other set of gap control assemblies 5 installed on the second mounting plate 45 is used to control the gap between the root of the welding bevel of the second right angle surface 32 of the door corner supplement assemblies 3 and the welding surface 8 of the door pillar 2.

[0054] In a more preferred embodiment, the gap control assembly 5 includes a support frame 51, a gap diaphragm 52, and a gap diaphragm adjustment mechanism 53. The gap diaphragm adjustment mechanism 53 is connected to the gap diaphragm 52 and drives the gap diaphragm 52 to move. The gap diaphragm 52 in the gap control assembly 5 mounted on the first mounting plate 44 moves along the vehicle height direction to adjust the gap between the gap diaphragm 52 and the welding surface 8 of the underframe side beam 1. The gap diaphragm 52 in the gap control assembly 5 mounted on the second mounting plate 45 moves along the vehicle length direction to adjust the gap between the gap diaphragm 52 and the welding surface 8 of the door pillar 2. The gap diaphragm 52 can be made of stainless steel, aluminum, or aluminum alloy, or even nylon.

[0055] Among them, the support frame 51 in the two sets of clearance control assemblies 5 is fixed on the first mounting plate 44 and the second mounting plate 45 of the base assembly 4 respectively. The support frame 51 can be directly welded or glued to the corresponding mounting plate, or it can be fixed to the mounting plate by screws.

[0056] The gap diaphragm 52 is arranged parallel to the welding surface 8 of the corresponding door column 2 or base frame side beam 1. The gap diaphragm 52 has a portion extending towards the door corner assembly 3. The gap diaphragm 52 is parallel to the welding surface 8 of the corresponding door column 2 and base frame side beam 1. The root of the welding bevel of the door corner assembly 3 is attached to the gap diaphragm 52, which can control the gap between the root of the right angle welding bevel of the door corner assembly 3 and the welding surface 8.

[0057] In this preferred embodiment, the gap diaphragm adjustment mechanism 53 includes a housing 531, a worm 532, a worm wheel 533, a gear set, and a rack 536. The gear set includes a pinion 534 and a gear 535 that mesh with each other. The worm wheel 533 meshes with the worm 532 and is coaxially and fixedly connected to the pinion 534. The gear 535 meshes with the rack 536, and the rack 536 is fixedly connected to the gap diaphragm 52 via a push rod 537. The worm 532, worm wheel 533, pinion 534, gear 535, and rack 536 are installed inside the housing 531, which is located on the outer side of the mounting support frame 51. One end of the worm 532 passes through the outer side of the housing 531 for rotational operation by the operator. More preferably, the meshing pinion 534 and gear 535 are high-ratio gear sets for precise gap adjustment, achieving a control accuracy of 0.5 mm or higher. At the same time, by utilizing the self-locking characteristics of the worm gear, the positioning dimensions of the gap diaphragm 52 can be prevented from changing during construction, thus ensuring positioning accuracy.

[0058] The gap diaphragm adjustment mechanism 53 also includes at least two guide rods 54, preferably two guide rods 54. One end of each guide rod 54 is fixedly connected to the gap diaphragm 52, and the guide rod 54 is also slidably connected to the support frame 51. Two sliding holes (not shown in the figure) are provided on the support frame 51. The two guide rods 54 pass through the corresponding sliding holes and can slide along them. The end of the guide rod 54 connected to the gap diaphragm 52 can further pass through the first mounting plate 44 or the second mounting plate 45, and the guide rod 54 is also slidably connected to the first mounting plate 44 and the second mounting plate 45. The two guide rods 54 ensure that the gap diaphragm adjustment mechanism 53 remains parallel to the corresponding welding surface 8 when pushing the gap diaphragm 52, thereby ensuring uniform gap and guaranteeing welding quality and finished product quality.

[0059] When it is necessary to adjust the gap diaphragm 52, the operator can rotate the worm gear 532 in the forward and reverse directions as needed, which will drive the worm wheel 533, pinion 534 and gear 535 to rotate. The gear 535 will then drive the rack 536 to move in a direction perpendicular to the gap diaphragm 52, and finally drive the gap diaphragm 52 to move.

[0060] To facilitate intuitive observation and control of the gap adjustment by operators, this embodiment further preferably integrates a dial 55 on the large gear 535, with a corresponding visual reading window (not shown in the figure) on the housing 531. Operators can observe the dial 55 through the visual reading window for easy reading. The value on the dial 55 corresponds to the distance the gap diaphragm 52 moves, and more preferably directly corresponds to the gap between the root of the welding bevel of the door corner assembly 3 and the welding surface 8, which not only facilitates adjustment but also makes it more conducive to precise control of the gap adjustment amount.

[0061] like Figure 3 and Figure 6 As shown, the positioning control assembly 6 includes a positioning diaphragm 61 and a positioning diaphragm adjustment mechanism 62. The positioning diaphragm adjustment mechanism 62 is fixedly installed on the base assembly 4. The positioning diaphragm adjustment mechanism 62 is connected to the positioning diaphragm 61 and drives the positioning diaphragm 61 to move along the vehicle width direction. The positioning diaphragm 61 is perpendicular to the welding surface 8 of the door pillar 2 and the underframe side beam 1. The outer surface of the door corner bracket 3 is attached to the positioning diaphragm 61, which can accurately control the installation position of the door corner bracket 3 in the vehicle length and height directions, and prevent the door corner bracket 3 from being misaligned during installation. The positioning diaphragm 61 can be made of stainless steel, aluminum or aluminum alloy, or nylon, etc.

[0062] Furthermore, the positioning diaphragm 61 adopts a right-angled structure, matching the shape of the outer surface of the door corner supplement assembly 3. This not only ensures the contact area between the door corner supplement assembly 3 and the positioning diaphragm 61, thereby precisely controlling the installation position of the door corner supplement assembly 3 in the vehicle length and height directions, but also enables synchronous positioning of the door corner supplement assembly 3 in both directions, improving operational efficiency. Additionally, by controlling the movement of the positioning diaphragm 61 in the vehicle width direction, the installation depth of the door corner supplement assembly 3 in that direction can also be precisely controlled.

[0063] The positioning diaphragm adjustment mechanism 63 and the gap diaphragm adjustment mechanism 53 have the same structure and adjustment method, including a housing 621, a worm 622, a worm wheel 623, a gear set, and a rack 626. The gear set consists of a small gear 624 and a large gear 625 meshing with each other. The worm wheel 623 meshes with the worm 622 and is coaxially and fixedly connected to the small gear 624. The large gear 625 meshes with the rack 626, and the rack 626 is fixedly connected to the positioning diaphragm 61 via a push rod 627. The worm 622, worm wheel 623, small gear 624, large gear 625, and rack 626 are installed inside the housing 621. One end of the worm 622 passes through the outside of the housing 621 for rotational operation by the operator. More preferably, the small gear 624 and large gear 625 are high-ratio gear sets to precisely adjust the movement distance of the positioning diaphragm 61 in the vehicle width direction.

[0064] The housing 621 of the positioning diaphragm adjustment mechanism 63 is directly mounted on the outer side of the first mounting plate 44 or the second mounting plate 45, and can be connected to the mounting plate by welding, bonding, or fixing with screws. Figure 6As shown, the housing 621 is installed on the outside of the second mounting plate 45. In order to cooperate with the installation of the positioning diaphragm adjustment mechanism 63, a triangular reinforcing rib 48 is also provided at the connection between the first mounting plate 44 and the second mounting plate 45. That is, the positioning diaphragm adjustment mechanism 63 is installed on both the second mounting plate 45 and the reinforcing rib 48. The reinforcing rib 48 also helps to improve the overall structural strength of the base part 4.

[0065] The positioning diaphragm adjustment mechanism 63 also includes multiple guide rods 63. Since the positioning diaphragm 61 has an angular structure, four guide rods 63 are preferably installed. One end of each guide rod 63 is fixedly connected to the positioning diaphragm 61, and the guide rods 63 are also slidably connected to the second mounting plate 45 and the reinforcing rib plate 48. Four sliding holes are provided on the second mounting plate 45 and the reinforcing rib plate 48, and the four guide rods 63 pass through the corresponding sliding holes and can slide along the sliding holes. The four guide rods 63 ensure that the positioning diaphragm adjustment mechanism 63 remains perpendicular to the welded surfaces 8 of the door post 2 and the base frame side beam 1 when pushing the positioning diaphragm 61 to move, without any deviation.

[0066] When the positioning diaphragm 61 needs to be adjusted, the operator rotates the worm gear 622, which in turn drives the worm wheel 623, pinion 624 and gear 625 to rotate. The gear 625 then drives the rack 626 to move in a direction perpendicular to the positioning diaphragm 61, ultimately moving the positioning diaphragm 61.

[0067] To facilitate intuitive observation and control of the clearance adjustment by operators, this embodiment is further optimized by integrating a dial 64 on the large gear 625, with a corresponding visual reading window (not shown in the figure) on the housing 621. Operators can observe the dial 64 through the visual reading window for easy reading. The value on the dial 64 corresponds to the distance the positioning diaphragm 61 moves, which not only facilitates adjustment but also makes it more conducive to precise control of the adjustment amount of the positioning diaphragm 61.

[0068] The welding process for the door corner filler is as follows:

[0069] 1. Adjust the worm gear 532 in the two sets of gap control assemblies 5, and combine the values ​​on the dial 55 in the visualization reading window to adjust the weld groove root gap of the first right angle surface 31 and the second right angle surface 32 of the door corner supplement assembly 3 to the ideal data.

[0070] 3. Adjust the worm gear 622 in the positioning control assembly 6, and move the positioning diaphragm 61 to the set position by combining the value on the dial 64 in the visual reading window.

[0071] 3. Install the adjusted device at the corner of the base frame side beam 1 and the door pillar 2, so that the two sides of the base plate 41 are attached to the outer surface 7 of the base frame side beam 1 and the door pillar 2, and the first positioning plate 42 and the second positioning plate 43 are respectively attached to the welding surface 8 of the base frame side beam 1 and the door pillar 2. Of course, this step can also be adjusted before the diaphragm adjustment step, that is, the base assembly 4 is installed on the base frame side beam 1 and the door pillar 2 before adjusting the gap diaphragm 51 and the positioning diaphragm 61.

[0072] 4. Install the door corner supplement assembly 3, so that the first right-angled surface 31 and the second right-angled surface 32 of the door corner supplement assembly 3 are tightly attached to the gap diaphragm 52 in the two sets of gap control assemblies 5, and at the same time, the outer surface of the door corner supplement assembly 3 is also tightly attached to the positioning diaphragm 61.

[0073] 5. The door corner supplement 3 is welded to the base frame side beam 1 and door column 2 using a welding process of single-sided welding and double-sided forming.

[0074] For the finished product after welding, this device can be used to accurately detect the installation position of the door corner patch assembly 3, and confirm whether the finished product quality of the door corner patch assembly 3 meets the design requirements.

[0075] This device has the following advantages:

[0076] (1) The device simulates the interface relationship between the door corner assembly and the vehicle body. Through the cooperation of the base assembly, the gap control assembly and the positioning control assembly, the door corner assembly can be accurately positioned in the vehicle length and height directions, and the gap at the root of the weld bevel can be precisely controlled, which improves the welding quality of the door corner assembly and further enhances the reinforcing effect of the door corner assembly.

[0077] (2) This device can detect the installation dimensions of the completed door corner assembly, realize the whole process guarantee of door corner assembly, welding and inspection, realize the precision manufacturing of welding, and solve the problems of difficult positioning of stainless steel rail vehicle door corner assembly, difficulty in ensuring root gap, inability to melt through single-sided welding double-sided forming, and inconvenience in detecting dimensions after completion.

[0078] (3) The device is simple and convenient to operate, and can achieve rapid and accurate positioning, which is conducive to greatly improving the efficiency of welding operations.

[0079] (4) The positioning diaphragm of the device adopts a right-angled structure that matches the shape of the door corner assembly, which can realize the synchronous positioning of the door corner assembly in the vehicle length direction and vehicle height direction, greatly improving the work efficiency.

[0080] (5) The diaphragm adjustment mechanism of the device adopts a worm gear and a high transmission ratio gear set, which makes it easy to achieve a control accuracy of 0.5mm. At the same time, the self-locking performance of the worm gear mechanism is utilized to ensure that the positioning size of the diaphragm does not change during the construction process.

[0081] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A door corner patch assembly welding device, characterized in that: include: A base assembly, installed at the corner of the base frame side beam and the door post, includes a right-angled L-shaped base plate. Positioning plates bent perpendicularly towards the door corner and mounting plates protruding away from the door corner are provided on the two right-angled sides of the base plate. The mounting plates include a first mounting plate and a second mounting plate. A gap control assembly and a positioning control assembly are both mounted on the mounting plates. After installation, the two planes of the base plate are respectively attached to the outward-facing surfaces of the base frame side beam and the door post. The two positioning plates are respectively attached to the welding surfaces of the base frame side beam and the door post. The cross-sections of the two mounting plates are both right-angled L-shaped structures, protruding from the right-angled sides of the base plate towards the direction away from the door corner, formed by bending perpendicularly outward and then upward from the right-angled sides. The gap control assembly is fixedly installed on a first surface perpendicular to the base plate, and the positioning control assembly is installed on a second surface parallel to the base plate. The first surface of the first mounting plate is flush with the welding surface of the corresponding base frame side beam, and the first surface of the second mounting plate is flush with the welding surface of the corresponding door post. The gap control assembly consists of two sets mounted on two mounting plates. It is used to control the gap between the root of the welding bevel of the two right-angled surfaces of the door corner assembly and the welding surfaces of the door pillar and the base frame side beam. The gap control assembly includes a support frame, a gap diaphragm, and a gap diaphragm adjustment mechanism. The support frame is fixed on the mounting plate. The gap diaphragm adjustment mechanism is connected to the gap diaphragm and drives the gap diaphragm to move along the vehicle height or vehicle length direction. The gap diaphragm has a portion extending towards the door corner assembly. The gap diaphragm is parallel to the welding surface of the corresponding door pillar or base frame side beam. The root of the welding bevel of the door corner assembly is attached to the gap diaphragm. The positioning control assembly is used to control the installation position of the door corner assembly in the vehicle length and vehicle height directions. The positioning control assembly includes a positioning diaphragm and a positioning diaphragm adjustment mechanism. The positioning diaphragm adjustment mechanism is fixed on the base assembly. The positioning diaphragm adjustment mechanism is connected to the positioning diaphragm and drives the positioning diaphragm to move along the vehicle width direction. The positioning diaphragm matches the shape of the outer surface of the door corner assembly and fits against the outer surface of the door corner assembly. The positioning diaphragm adjustment mechanism and the gap diaphragm adjustment mechanism have the same structure and adjustment method, both being diaphragm adjustment mechanisms. The diaphragm adjustment mechanism includes a housing, a worm, a worm wheel, a gear set, and a rack. The gear set consists of a meshing pinion and a large gear. The worm wheel meshes with the worm, the pinion is coaxially and fixedly connected to the worm wheel, and the large gear meshes with the rack. The rack is fixedly connected to the diaphragm via a push rod. Rotating the worm drives the diaphragm to move. The worm, worm wheel, gear set, and rack are installed inside the housing, which is fixed to the outside of the support frame or directly fixed to the base assembly.

2. The door corner fitting welding device according to claim 1, characterized in that: The positioning diaphragm has a right-angled structure.

3. The door corner fitting welding device according to claim 1, characterized in that: The diaphragm adjustment mechanism further includes at least two guide rods, one end of which is fixedly connected to the diaphragm, and the guide rod is also slidably connected to the support frame or base assembly.

4. The door corner fitting welding device according to claim 1, characterized in that: A scale is integrated on the large gear, and a corresponding visual reading window is opened on the housing.

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