Rail transit flood prevention door welding tool

Abstract

The utility model belongs to rail transit technical field discloses a kind of rail transit floodgate welding tool, comprising: L-shaped plate piece;Positioning frame is fixed on L-shaped plate piece;Adjusting assembly is set on positioning frame, for through screw rod adjusting lock sleeve size;And positioning structure at the opening end of positioning frame.When using, the steel plate of lock sleeve is placed into the space formed by L-shaped plate piece and positioning frame, accurately positioned by rotating screw rod and being fixed, then the other side can be fixed by turning tool.The utility model realizes the quick, accurate positioning of lock sleeve by modular structure combination, with the advantages of good welding quality, high assembly efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit technology, specifically relating to a welding fixture for a rail transit flood prevention door. Background Technology

[0002] In the manufacturing process of flood-proof gates for rail transit, the welding of the door leaf locking sleeve is a critical step. The locking sleeve is usually a rectangular frame structure formed by splicing and welding four steel plates (top, bottom, left, and right). The dimensional accuracy of the welded sleeve and the perpendicularity of adjacent plates directly affect the subsequent installation of the lock, the sealing performance of the door, and the efficiency of on-site debugging.

[0003] Currently, the closest solution in the industry is to directly position and weld the locking sleeve using a locking sleeve connecting bracket and a reinforcing plate. In developing this invention, the inventors discovered that this traditional method has at least the following problems:

[0004] 1. Manual positioning using simple brackets and reinforcing plates leads to unstable dimensional control, easily resulting in dimensional deviations in the locking sleeve after welding. This, in turn, causes excessive gaps or even prevents installation of the lock cylinder during assembly. Furthermore, during the later overall adjustment of the door leaf and frame, ensuring a tight seal between the mating surfaces is difficult, affecting the sealing performance of the flood-proof door.

[0005] 2. Due to the instability of manual positioning, the thermal deformation generated during the welding process is difficult to control effectively, resulting in severe deformation of the locking sleeve after welding, and the dimensions and perpendicularity cannot be reliably guaranteed.

[0006] 3. The positioning process is cumbersome, requiring workers to repeatedly measure, adjust, and calibrate, which consumes a lot of time and results in low overall work efficiency, making it impossible to meet the needs of mass production. Utility Model Content

[0007] The present invention aims to solve, at least to some extent, the aforementioned technical problems. Therefore, the purpose of this invention is to provide a welding fixture for flood-proof gates used in rail transit.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A welding fixture for a flood-proof gate for rail transit includes: an L-shaped plate, a positioning frame, an adjustment assembly, and a positioning structure.

[0010] The L-shaped plate includes a horizontal base plate and a vertical plate arranged perpendicularly to each other. The L-shaped plate provides basic support and positioning reference for the entire tooling.

[0011] The positioning frame is an inverted U-shaped structure, fixed to the horizontal base plate of the L-shaped plate and adjacent to the vertical plate. The positioning frame is used to accommodate the locking sleeve to be welded. The positioning frame and the L-shaped plate together form a reference space for four-sided positioning.

[0012] The adjustment component is mounted on the positioning frame and is used to adjust the position of the locking sleeve within the positioning frame. This adjustment component allows for precise fine-tuning of the individual steel plates that make up the locking sleeve.

[0013] The positioning structure is also an inverted U-shaped structure, located on the side of the positioning frame away from the vertical plate. This positioning structure is located at the open end of the positioning frame, forming a complete frame-shaped constraint structure.

[0014] In a preferred embodiment, the L-shaped plate is machined from a 16mm thick steel plate; the flatness error of the horizontal base plate is no greater than 0.5mm, and the perpendicularity error between the vertical plate and the horizontal base plate is no greater than 0.5°. This ensures that the tooling itself has a high-precision reference plane and a vertical reference plane.

[0015] As a preferred embodiment, the positioning frame is welded from flat steel and includes a top plate and two side plates. The bottom edges of the two side plates are fixed to the horizontal base plate, ensuring that the frame has precise right angles and avoiding the errors caused by the rounded corners of standard profiles.

[0016] In a preferred embodiment, the adjusting assembly includes at least two nuts welded to the outer wall of the positioning frame, and a screw threaded to the nuts; the end of the screw passes through the wall panel of the positioning frame and extends into it to abut against and push the steel plate of the locking sleeve.

[0017] Furthermore, the at least two nuts and their cooperating screws are respectively located on the upper side of the positioning frame, and on one of the left and right sides. Since one side of the locking sleeve is already positioned by the vertical plate of the L-shaped plate, precise control of the three-dimensional dimensions can be achieved simply by setting adjusting screws on the other side and the upper side.

[0018] In a preferred embodiment, the positioning structure is installed as a detachable baffle or door at the open end of the positioning frame, providing a positioning reference for the locking sleeve.

[0019] As a preferred embodiment, the vertical plate is designed in terms of size and strength to serve as the base of the entire fixture. This allows the entire fixture to be flipped over after the first step of tack welding is completed, with the vertical plate in contact with the ground, for upright tack welding of the locking sleeve. This design enables tack welding on both sides of the workpiece without removing it from the fixture, greatly improving efficiency and convenience.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention allows for precise control of the width, height, and other dimensions of the locking sleeve through the adjustment components, and utilizes L-shaped plates and positioning frames to ensure its verticality, thereby ensuring that the dimensions of the finished product after welding meet the requirements of the drawings.

[0022] The tooling provides a firm and precise constraint on each steel plate of the locking sleeve. After adjustment, the dimensions are fixed by multi-point spot welding, which effectively suppresses welding thermal deformation and ensures the dimensional stability and form and position tolerances after welding. Attached Figure Description

[0023] Figure 1 This is a side view of the welding fixture for the rail transit floodproof door of this utility model.

[0024] Figure 2 This is a front view (partial sectional view) of the welding fixture for the rail transit flood prevention door of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. L-shaped panel; 101. Horizontal base plate; 102. Vertical panel;

[0027] 2. Positioning framework;

[0028] 3. Adjustment assembly; 301. Nut; 302. Screw;

[0029] 4. Positioning structure;

[0030] 5. Locking sleeve. Detailed Implementation

[0031] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings herein can generally be arranged and designed in various different configurations.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., 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; and they can refer to the internal connection of two components.

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Please see Figure 1 and Figure 2 This embodiment provides a welding fixture for a rail transit flood control door, mainly used for precise positioning of the locking sleeve 5 of the door leaf of a drop-type flood control door before welding. The rail transit flood control door welding fixture includes an L-shaped plate 1 as a base, a positioning frame 2 for accommodating the workpiece, an adjustment component 3 for fine-tuning the size, and a positioning structure 4.

[0035] L-shaped plate 1 is the reference component of the entire tooling, machined from a 16mm thick steel plate to ensure sufficient rigidity and stability. It includes a horizontal base plate 101 and a vertical plate 102 perpendicular to it. To ensure positioning accuracy, the machining requirements for L-shaped plate 1 are high: the flatness error of the horizontal base plate 101 is required to be no greater than 0.5mm, while the perpendicularity error between the vertical plate 102 and the horizontal base plate 101 is required to be no greater than 0.5°.

[0036] The positioning frame 2 is the main structure of the tooling, and is made of flat steel welded into an inverted U-shape according to the approximate size of the locking sleeve 5. The frame includes a top plate and two side plates, the bottom edges of which are firmly welded to the horizontal base plate 101 of the L-shaped plate 1.

[0037] like Figure 2 As shown, the adjusting assembly 3 includes at least two nuts 301 and matching screws 302. In this embodiment, one nut 301 is welded to the outer wall of the top plate of the positioning frame 2, and the other nut 301 is welded to the outer wall of the side plate of the positioning frame 2 away from the vertical plate 102. A through hole is provided on the positioning frame 2 at the corresponding position. The screw 302 is screwed into the nut 301, and its end extends into the interior of the positioning frame 2 through the through hole. The height of the locking sleeve 5 can be adjusted by rotating the upper screw 302, and the width of the locking sleeve 5 can be adjusted by rotating the side screw 302.

[0038] The positioning structure 4 is a detachable inverted U-shaped baffle. It is positioned at the open end of the positioning frame 2 away from the vertical plate 102. Together with the positioning frame 2 and the L-shaped plate 1, it forms a complete positioning space with four-sided constraints.

[0039] The following details the usage process of this tooling:

[0040] Step 1: Before use, check whether the weld between the positioning frame 2 and the L-shaped plate 1 is firm, and confirm that the screw 302 and nut 301 fit smoothly and rotate flexibly.

[0041] Step 2: Initial Positioning and Tack Welding. Place the four steel plates (upper, lower, left, and right) constituting the locking sleeve 5 into the space formed by the L-shaped plate 1 and the positioning frame 2 in the assembly sequence. Ensure the bottom plate of the locking sleeve 5 is aligned with the horizontal bottom plate 101, and one side plate is aligned with the vertical plate 102. Rotate the screws 302 located on the upper and side sides of the positioning frame 2 to move the corresponding steel plates of the locking sleeve 5. Simultaneously, use calipers or other tools to measure and confirm that the width and height dimensions of the locking sleeve 5 meet the drawing requirements. After confirmation, perform multi-point tack welding at the weld joints of adjacent steel plates of the locking sleeve 5.

[0042] Step 3: Workpiece placement and tack fixing. After tack fixing the first side, rotate the entire fixture, including the internal locking sleeve 5, 90° so that the vertical plate 102 of the L-shaped plate 1 serves as a new base and smoothly contacts the ground. At this point, the locking sleeve 5 is in an upright position, exposing the weld seam on the other side that could not be welded previously. Perform multi-point tack fixing on these remaining weld seams again.

[0043] Step 4: Formal Welding. After all welds have been tack-bonded and the overall shape and size of the locking sleeve 5 have been stabilized, loosen all screws 302 and remove the tack-bonded locking sleeve 5 from the fixture. Then, according to the welding process requirements, perform full welding on all tack-bonded welds to finally complete the welding of the locking sleeve.

[0044] This invention provides a stable reference through an L-shaped plate and a positioning frame, achieves precise dimensional control through adjustable components, and realizes efficient and accurate welding positioning through a flip-up design. All materials used are conventional metals, which are easy to process and procure, resulting in low manufacturing costs and wide applicability.

[0045] This utility model is not limited to the above-mentioned optional embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that falls within the scope of the claims of this utility model shall be protected by this utility model.

Claims

1. A welding fixture for flood-proof gates in rail transit, characterized in that, include: L-shaped plate (1) includes a horizontal base plate (101) and a vertical plate (102) arranged perpendicularly to each other. The positioning frame (2) is fixed on the horizontal base plate (101) of the L-shaped plate (1) and adjacent to the vertical plate (102). The positioning frame (2) is used to accommodate the locking sleeve (5) to be welded. Adjustment component (3) is set on the positioning frame (2) and is used to adjust the position of the locking sleeve (5) within the positioning frame (2).

2. The welding fixture for a flood-proof gate in rail transit according to claim 1, characterized in that, The L-shaped plate (1) is made of steel plate with a thickness of 16mm; the flatness error of the horizontal base plate (101) is no greater than 0.5mm, and the perpendicularity error between the vertical plate (102) and the horizontal base plate (101) is no greater than 0.5°.

3. The welding fixture for a flood-proof gate in rail transit according to claim 1, characterized in that, The positioning frame (2) includes a top plate and two side plates, the bottom edges of which are fixed to the horizontal base plate (101).

4. The welding fixture for a flood-proof gate in rail transit according to claim 1, characterized in that, The adjustment assembly (3) includes at least two nuts (301) welded to the outer wall of the positioning frame (2) and a screw (302) threadedly connected to the nuts (301); the end of the screw (302) passes through the wall panel of the positioning frame (2) and extends into it to abut against and push the steel plate of the locking sleeve (5).

5. The welding fixture for a flood-proof gate in rail transit according to claim 4, characterized in that, The at least two nuts (301) and their cooperating screws (302) are respectively disposed on the upper side of the positioning frame (2) and on one of the left and right sides.

6. The welding fixture for a flood-proof gate in rail transit according to claim 1, characterized in that, Also includes: The positioning structure (4) is located on the side of the positioning frame (2) away from the vertical plate (102).

7. The welding fixture for a flood-proof gate in rail transit according to claim 6, characterized in that, Also includes: The positioning structure (4) is detachably installed at the open end of the positioning frame (2).

Images