Civil air defense door lower hinge welding clamp

Abstract

The civil air defense door lower hinge welding clamp comprises a bottom plate, the bottom plate is provided with a first limiting plate arranged transversely and a second limiting plate arranged longitudinally, and a positioning area used for containing a fixing plate to be welded is formed between the first limiting plate and the second limiting plate; a first linear telescopic mechanism is arranged on the side, away from the positioning area, of the first limiting plate in the longitudinal direction, and the telescopic end of the first linear telescopic mechanism faces the positioning area and is provided with a positioning plate; the side, facing the positioning area, of the positioning plate is provided with two positioning grooves corresponding to the to-be-welded lug plates, the width of the positioning grooves is matched with the thickness of the to-be-welded lug plates, and the distance between the two positioning grooves is matched with the distance between the to-be-welded lug plates. A second linear telescopic mechanism which is vertically arranged downwards is arranged above the positioning area, and a positioning pressing block used for vertically pressing the lug plate to be welded is arranged at the telescopic end of the second linear telescopic mechanism. The clamping device has the advantages of being reasonable in structural design, capable of accurately and stably clamping, capable of meeting stable welding requirements and the like.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a welding clamp for the lower hinge of a civil defense door. Background Technology

[0002] Civil defense doors are the entrances and exits of civil defense projects. Civil defense doors are clearly classified, including ordinary single and double-leaf protective airtight doors and airtight doors, as well as single and double-leaf protective airtight doors and airtight doors with movable thresholds, among other types of civil defense equipment. The door panels and frames of most civil defense doors are connected by hinges. Currently, there are... Figure 1 The lower hinge is composed of a fixed plate and an ear plate welded together. The ear plate is vertically connected to the fixed plate, which is then bolted to the threshold. Due to the heavy weight of the door panel and the considerable thickness of the ear plate, bevels need to be machined on both sides of the ear plate to increase welding strength and ensure reliable welding. However, the bevels reduce the contact width between the ear plate and the fixed plate, decreasing the positioning stability of the ear plate before welding, increasing welding difficulty, and affecting welding accuracy. Therefore, how to position the ear plate and fixed plate for easy welding has become an urgent problem to be solved. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide a welding fixture for the lower hinge of a civil defense door with a reasonable structural design, which can accurately and stably clamp the door and improve the welding quality.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A welding fixture for the lower hinge of a civil defense door includes a base plate. The base plate has a first limiting plate arranged laterally and a second limiting plate arranged longitudinally. The second limiting plate is located on one side of the first limiting plate along its length, and a positioning area for placing a fixing plate to be welded is formed between the two. The side of the first limiting plate away from the positioning area has a first linear telescopic mechanism arranged longitudinally. The telescopic end of the first linear telescopic mechanism faces the positioning area and is equipped with a positioning plate. The distance between the positioning plate and the base plate is greater than the height of the first limiting plate and the thickness of the fixing plate to be welded, and the height of the positioning plate is greater than the sum of the thickness of the fixing plate to be welded and the bevel height of the ear plate to be welded. The side of the positioning plate facing the positioning area has two positioning grooves corresponding to the ear plate to be welded. The width of the positioning groove matches the thickness of the ear plate to be welded, and the distance between the two positioning grooves matches the spacing between the ear plates to be welded. Above the positioning area is a second linear telescopic mechanism arranged vertically downwards. The telescopic end of the second linear telescopic mechanism is provided with a positioning block for vertically pressing the ear plate to be welded.

[0006] Using the above structure, during welding, the fixing plate to be welded is placed in the positioning area, with its edges abutting against the first and second limiting plates respectively. Since the distance between the positioning plate and the base plate is greater than the height of the first limiting plate and the thickness of the fixing plate, the positioning plate can move from the top of the first limiting plate to above the fixing plate. During clamping, the positioning plate is moved to the area above the fixing plate to be welded via the first linear telescopic mechanism, and the ear plate to be welded is placed in the corresponding positioning groove. Because the height of the positioning plate is greater than the sum of the thickness of the fixing plate and the bevel height, the bevel is located within the positioning groove, allowing the two sides of the ear plate to be vertically positioned via the sidewalls of the positioning groove for initial positioning. After the ear plate is initially positioned, the positioning pressure block is driven vertically to press against the top of the ear plate via the second linear telescopic mechanism. The combined action of the contact surface between the bottom of the ear plate and the base plate, and the positioning pressure block, ensures that the ear plate is reliably placed vertically on the fixing plate. At this point, the positioning plate is removed from above the fixing plate by the retraction of the first linear telescopic mechanism, allowing welding of the bevel between the ear plate and the base plate. The above structure allows the ear plate to be reliably placed on the fixed plate through the initial positioning of the positioning plate and the clamping positioning of the positioning block. This facilitates welding, improves welding quality, and increases welding efficiency.

[0007] Furthermore, the first limiting plate has two first guide blocks spaced apart along its length. The distance between the two first guide blocks is the same as the width of the positioning plate along the length of the first limiting plate. The height of the first guide blocks is greater than the distance between the positioning plate and the base plate. The positioning plate is linearly movable and fits between the two first guide blocks.

[0008] Furthermore, the positioning area has a gate-shaped bracket above it, which is arranged along the length of the first limiting plate; the bracket has a third linear telescopic mechanism on the side away from the second limiting plate, which is inclined toward the positioning area, and the telescopic end of the third linear telescopic mechanism is provided with a side pressure block for pressing the rib plate to be welded.

[0009] Furthermore, the side pressure block facing the positioning area has a first limiting groove that is perpendicular to the third linear telescopic mechanism and obliquely penetrates it, and the width of the first limiting groove matches the thickness of the stiffening plate to be welded.

[0010] In this way, the longitudinal position of the stiffening plate to be welded can be positioned by the limiting groove, thereby ensuring the consistency of the welding.

[0011] Furthermore, the bottom of the positioning block has two second limiting grooves corresponding to the ear plate to be welded. The width of the second limiting groove matches the thickness of the ear plate to be welded, and the depth is less than the height of the ear plate to be welded.

[0012] Furthermore, the bottom of the second limiting groove has a limiting surface that is inclined along the length direction, and the limiting surface is symmetrically arranged at both ends of the second limiting groove.

[0013] Furthermore, the opening side of the second limiting groove extends outward along the width direction to form a guide surface.

[0014] Furthermore, the crossbeam of the bracket has two vertically arranged auxiliary guide rails, each of which is coupled with a vertically arranged support bar via a slider, and the positioning pressure block frame is mounted on the lower end of the two support bars; the second linear telescopic mechanism is located between the two auxiliary guide rails.

[0015] Furthermore, the crossbeam of the bracket has two second guide blocks arranged laterally at intervals. The two second guide blocks are located on the outside of the two auxiliary guide rails respectively, and are respectively fitted to the corresponding auxiliary guide rails.

[0016] Furthermore, the first linear telescopic mechanism, the second linear telescopic mechanism, and the third linear telescopic mechanism are telescopic cylinders.

[0017] In summary, this utility model has the advantages of reasonable structural design, precise and stable clamping, and improved welding quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the lower hinge page structure.

[0019] Figure 2 This is a schematic diagram of the overall structure of this embodiment.

[0020] Figure 3 and Figure 4 This is a structural diagram of the hinged state in this embodiment.

[0021] Figure 5 This is a schematic diagram of the internal structure of the positioning pressure block.

[0022] Figure 6 This is a structural schematic diagram of the base plate in this embodiment. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the embodiments.

[0024] In practical implementation: such as Figures 2-5As shown, a welding fixture for the lower hinge of a civil defense door includes a base plate 1. The base plate 1 has a first limiting plate 21 arranged laterally and a second limiting plate 22 arranged longitudinally. The second limiting plate 22 is located on one side of the first limiting plate 21 along its length, and a positioning area 2 for placing a fixing plate to be welded is formed between the two. The first limiting plate 21 has a first linear telescopic mechanism 3 arranged longitudinally on the side opposite to the positioning area 2. The telescopic end of the first linear telescopic mechanism 3 faces the positioning area 2 and is equipped with a positioning plate 4. The distance between the positioning plate 4 and the base plate 1 is greater than the distance between the first limiting plate 21 and the first limiting plate 22. The height of the first limiting plate 21 is equal to the thickness of the fixing plate to be welded, and the height of the positioning plate 4 is greater than the sum of the thickness of the fixing plate to be welded and the bevel height of the ear plate to be welded; the positioning plate 4 has two positioning grooves on the side facing the positioning area 2 that correspond to the ear plate to be welded, the width of the positioning grooves matches the thickness of the ear plate to be welded, and the distance between the two positioning grooves matches the spacing between the ear plates to be welded; the positioning area 2 has a second linear telescopic mechanism 6 arranged vertically downward above it, and the telescopic end of the second linear telescopic mechanism 6 is provided with a positioning pressure block 7 for vertically pressing the ear plate to be welded.

[0025] The bottom of the positioning block 7 has two second limiting grooves 71 corresponding to the ear plates to be welded. The width of the second limiting groove 71 matches the thickness of the ear plate to be welded, and the depth is less than the height of the ear plate to be welded. The bottom of the second limiting groove 71 has a limiting surface 72 inclined along the length direction, and the limiting surface 72 is symmetrically arranged at both ends of the second limiting groove 71. The opening side of the second limiting groove 71 extends outward along the width direction to form a guide surface 73.

[0026] Above the positioning area 2 is a gate-shaped bracket 5, which is arranged along the length of the first limiting plate 21. On the side of the bracket 5 away from the second limiting plate 22, there is a third linear telescopic mechanism 8 inclined towards the positioning area 2. The telescopic end of the third linear telescopic mechanism 8 is provided with a side pressure block 9 for pressing the stiffening plate to be welded. The side pressure block 9, facing the positioning area 2, has a first limiting groove that is perpendicular to the third linear telescopic mechanism 8 and obliquely penetrates it. The width of the first limiting groove matches the thickness of the stiffening plate to be welded. In this way, the longitudinal position of the stiffening plate to be welded can be positioned through the limiting groove, thereby ensuring the consistency of the welding.

[0027] The crossbeam of the bracket 5 has two vertically arranged auxiliary guide rails 10, each with a vertically arranged support bar 11 connected to it via a slider. The positioning block 7 is mounted on the lower end of the two support bars 11. The second linear telescopic mechanism 6 is located between the two auxiliary guide rails 10. The crossbeam of the bracket 5 has two horizontally spaced second guide blocks 12, which are located on the outer sides of the two auxiliary guide rails 10 and are respectively fitted to the corresponding auxiliary guide rails 10.

[0028] The first limiting plate 21 has two first guide blocks 23 spaced apart along its length. The distance between the two first guide blocks 23 is the same as the width of the positioning plate 4 along the length of the first limiting plate 21. The height of the first guide blocks 23 is greater than the distance between the positioning plate 4 and the base plate 1. The positioning plate 4 is linearly movable and fits between the two first guide blocks 23. In this embodiment, the first linear telescopic mechanism 3, the second linear telescopic mechanism 6, and the third linear telescopic mechanism 8 are telescopic cylinders.

[0029] During welding, the plate to be welded is placed in the positioning area, with its edges aligned with the first and second limiting plates respectively. Since the distance between the positioning plate and the base plate is greater than the height of the first limiting plate and the thickness of the base plate, the positioning plate can move from the top of the first limiting plate to above the base plate. During clamping, the positioning plate is moved to the area above the plate to be welded via the first linear telescopic mechanism, and the ear plate to be welded is placed in the corresponding positioning groove. Because the height of the positioning plate is greater than the sum of the thickness of the base plate and the bevel height, the bevel is located within the positioning groove, allowing the two sides of the ear plate to be vertically positioned via the sidewalls of the positioning groove for initial positioning. After the ear plate is initially positioned, the positioning block is vertically pressed against the top of the ear plate via the second linear telescopic mechanism. The contact surface between the bottom of the ear plate and the base plate, along with the combined action of the positioning block, ensures that the ear plate is reliably placed vertically on the base plate. At this point, the positioning plate is removed from above the base plate by the retraction of the first linear telescopic mechanism, allowing welding of the bevel between the ear plate and the base plate. The above structure allows the ear plate to be reliably placed on the fixed plate through the initial positioning of the positioning plate and the clamping positioning of the positioning block. This facilitates welding, improves welding quality, and increases welding efficiency.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding fixture for the lower hinge of a civil defense door, characterized in that, The system includes a base plate (1), on which a first limiting plate (21) is arranged laterally and a second limiting plate (22) is arranged longitudinally. The second limiting plate (22) is located on one side of the first limiting plate (21) along its length, and a positioning area (2) for placing a fixing plate to be welded is formed between the two. The first limiting plate (21) has a first linear telescopic mechanism (3) arranged longitudinally on the side away from the positioning area (2). The telescopic end of the first linear telescopic mechanism (3) faces the positioning area (2) and is fitted with a positioning plate (4). The distance between the positioning plate (4) and the base plate (1) is greater than that between the first limiting plate (21) and the second limiting plate (22). The height of a limiting plate (21) and the thickness of the fixing plate to be welded are specified, and the height of the positioning plate (4) is greater than the sum of the thickness of the fixing plate to be welded and the bevel height of the ear plate to be welded; the positioning plate (4) has two positioning grooves on the side facing the positioning area (2) that correspond to the ear plate to be welded, the width of the positioning grooves matches the thickness of the ear plate to be welded, and the distance between the two positioning grooves matches the spacing between the ear plates to be welded; the positioning area (2) has a second linear telescopic mechanism (6) arranged vertically downward above it, and the telescopic end of the second linear telescopic mechanism (6) is provided with a positioning pressure block (7) for vertically pressing the ear plate to be welded.

2. The welding fixture for the lower hinge of a civil defense door as described in claim 1, characterized in that, The first limiting plate (21) has two first guide blocks (23) spaced apart along the length direction. The distance between the two first guide blocks (23) is the same as the width of the positioning plate (4) in the length direction of the first limiting plate (21). The height of the first guide block (23) is greater than the distance between the positioning plate (4) and the base plate (1). The positioning plate (4) is linearly movable and fits between the two first guide blocks (23).

3. The welding fixture for the lower hinge of a civil defense door as described in claim 1, characterized in that, Above the positioning area (2) is a support (5) arranged in a gate shape, the support (5) is arranged along the length direction of the first limiting plate (21); the side of the support (5) away from the second limiting plate (22) has a third linear telescopic mechanism (8) that is inclined toward the positioning area (2), and the telescopic end of the third linear telescopic mechanism (8) is provided with a side pressure block (9) for pressing the rib plate to be welded.

4. The welding fixture for the lower hinge of a civil defense door as described in claim 3, characterized in that, The side pressure block (9) has a first limiting groove on the side facing the positioning area (2) that is perpendicular to the third linear telescopic mechanism (8) and obliquely through it. The width of the first limiting groove matches the thickness of the stiffening plate to be welded.

5. The welding fixture for the lower hinge of a civil defense door as described in claim 1, characterized in that, The bottom of the positioning block (7) has two second limiting grooves corresponding to the ear plate to be welded. The width of the second limiting groove matches the thickness of the ear plate to be welded, and the depth is less than the height of the ear plate to be welded.

6. The welding fixture for the lower hinge of a civil defense door as described in claim 5, characterized in that, The bottom of the second limiting groove has a limiting surface that is inclined along the length direction, and the limiting surface is symmetrically arranged at both ends of the second limiting groove.

7. The welding fixture for the lower hinge of a civil defense door as described in claim 6, characterized in that, The opening side of the second limiting groove extends outward along the width direction to form a guide surface.

8. The welding fixture for the lower hinge of a civil defense door as described in claim 3, characterized in that, The crossbeam of the bracket (5) has two vertically arranged auxiliary guide rails (10), each of which is connected to a vertically arranged support bar via a slider. The positioning block (7) is mounted on the lower end of the two support bars. The second linear telescopic mechanism (6) is located between the two auxiliary guide rails (10).

9. The welding fixture for the lower hinge of a civil defense door as described in claim 8, characterized in that, The support (5) has two second guide blocks arranged laterally at intervals on its crossbeam. The two second guide blocks are located on the outside of the two auxiliary guide rails (10) respectively, and are respectively fitted to the corresponding auxiliary guide rails (10).

10. The welding fixture for the lower hinge of a civil defense door as described in claim 3, characterized in that, The first linear telescopic mechanism (3), the second linear telescopic mechanism (6) and the third linear telescopic mechanism (8) are telescopic cylinders.

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