Steel structure welding preheating and tempering treatment device

Abstract

The utility model relates to the technical field of steel structure welding treatment, and discloses a steel structure welding preheating and tempering treatment device which comprises a working table, supporting seats are installed on the left side and the right side of the upper end face of the working table in a sliding mode, clamping mechanisms are arranged on the side walls of the supporting seats, and a vertical plate is fixedly installed on the left side of the upper end face of the working table. An adjusting mechanism is arranged between the vertical plates on the front side and the rear side, mounting bases are fixedly mounted on the front side and the rear side of the upper end face of the workbench, electric push rods are fixedly mounted on the front inner side wall and the rear inner side wall of each mounting base, and semicircular heating covers are fixedly mounted at the piston rod ends of the electric push rods. Through the arrangement of the clamping mechanism and the adjusting mechanism, the steel structure tubular workpiece can be clamped and fixed, preheating and annealing of the steel structure tubular workpiece are achieved under the matching action of the semicircular heating cover, the situation that the temperature difference of a welding area of a welding part is too large is avoided, and the welding quality is improved. And the probability of welding cracks of the steel structure tubular workpiece is reduced.

Description

Technical Field

[0001] This utility model relates to the field of steel structure welding treatment technology, specifically a steel structure welding preheating and tempering treatment device. Background Technology

[0002] Welding of steel structural profiles is a common connection method used to form a monolithic structure from different steel components. Welding deformation and residual stress are significant challenges. The high temperature generated during welding can cause deformation of the welded structure, especially for large and complex structures. Simultaneously, the heat generated during welding can induce residual stress between the weld joint and the base material, potentially leading to structural deformation, crack formation, and a tendency towards brittle fracture. Some steels may exhibit brittle fracture during welding, especially under conditions of rapid cooling or significant residual stress. This can reduce the toughness and strength of the weld joint, lowering structural safety. Furthermore, weld quality is difficult to inspect, as the internal weld quality is often hardened and difficult to directly observe and test. Preheating is a process that involves appropriately heating the workpiece, both locally and as a whole, before welding. Its purpose is to reduce the cooling rate of the weld joint, prevent the formation of hardened structures, and reduce welding stress and deformation. It is an effective method to prevent welding cracks.

[0003] However, during the welding of some existing tubular steel structural profiles, the large temperature difference between the welded parts and the welded components, the sudden heating followed by rapid cooling, and the rapid localized thermal changes cause plastic deformation. This plastic deformation remains after welding and cooling to room temperature, increasing the likelihood of welding cracks. Therefore, there is an urgent need for a preheating and tempering treatment device for steel structure welding. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to provide a preheating and tempering device for steel structure welding, so as to solve the problem of welding cracks caused by excessive temperature difference during steel structure pipeline welding mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a steel structure welding preheating and tempering treatment device, comprising a workbench, support seats slidably mounted on the left and right sides of the upper end face of the workbench, a clamping mechanism provided on the side wall of the support seats, a vertical plate fixedly mounted on the left side of the upper end face of the workbench, an adjustment mechanism provided between the vertical plates on the front and rear sides, mounting seats fixedly mounted on the front and rear sides of the upper end face of the workbench, an electric push rod fixedly mounted on the front and rear inner side walls of the mounting seat, and a semi-circular heating cover fixedly mounted on the piston rod end of the electric push rod.

[0008] Preferably, the clamping mechanism includes a positioning seat fixedly installed on the inner wall of the support base, a first connecting rod rotatably installed in the inner cavity of the positioning seat, a clamping screw threadedly installed in the inner cavity of the positioning seat, a movable seat threadedly installed at the side wall end of the clamping screw, and a second connecting rod rotatably installed on the inner side wall of the movable seat.

[0009] Preferably, a clamping motor is fixedly mounted on the outer wall of the support base via a frame, the output shaft end of the clamping motor is fixedly connected to the clamping screw, a clamping plate is rotatably mounted on the end of the second connecting rod away from the moving base, the end of the first connecting rod away from the positioning base is slidably mounted in the inner cavity of the clamping plate, and a central column is rotatably mounted on the middle of the side walls of the first and second connecting rods.

[0010] Preferably, there are a total of 4 sets of the first connecting rod and the second connecting rod, the side wall of the clamping plate is set as an arc surface, and the end of the clamping screw is fixedly installed with a limit block.

[0011] Preferably, the adjustment mechanism includes an adjustment worm gear rotatably mounted between the front and rear upright plates, an adjustment motor fixedly mounted on the left side of the upper end face of the worktable via a frame, a limit rod fixedly mounted on the rear side of the inner cavity of the mounting base, and a bidirectional lead screw rotatably mounted on the front side of the inner cavity of the mounting base.

[0012] Preferably, an adjusting worm gear is fixedly installed on the left end face of the bidirectional lead screw, the adjusting worm gear is meshed with the adjusting worm, the output shaft end of the adjusting motor is fixedly connected to the adjusting worm, the left and right sides of the bidirectional lead screw have opposite thread directions, the bidirectional lead screw is threadedly connected to the support seat, and the limiting rod is slidably connected to the support seat.

[0013] Preferably, the semi-circular heating covers on the front and rear sides are symmetrically arranged, and a controller is fixedly installed on the right side of the upper end face of the workbench. The controller is electrically connected to the semi-circular heating covers.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, after the worker places the steel structure tubular workpiece on the outer wall of the clamping plate, the clamping screw can be rotated by starting the clamping motor. Since the clamping screw is threadedly connected to the moving seat, and the side wall of the moving seat is fixedly installed with second connecting rods, the moving seat will drive the second connecting rods to move closer to the positioning seat under the limiting action of multiple sets of second connecting rods. Through the setting of the central column, the included angle between the first connecting rod and the second connecting rod will be increased, so that the four sets of clamping plates can move away from each other, so as to achieve stable clamping of the steel structure tubular workpiece.

[0016] 2. In this utility model, the worker can start the adjusting motor to rotate the adjusting worm gear. Since the adjusting worm gear is meshed with the adjusting worm wheel, the adjusting worm wheel will drive the bidirectional lead screw to rotate. Because the threads on the left and right sides of the bidirectional lead screw are opposite, the bidirectional lead screw is threadedly connected to the support seat. At this time, the support seats on the left and right sides will move closer to each other, so that the steel tubular workpieces on the left and right sides will move closer to each other. The worker can then start the electric push rod through the controller to move the semi-circular heating covers on the front and rear sides closer to each other. After the semi-circular heating covers on the front and rear sides contact each other, the worker can preheat and temper the steel tubular workpiece, avoiding a large temperature difference in the welding area of ​​the welded parts, reducing the probability of welding cracks in the steel tubular workpiece, and improving the working quality of the entire device. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the overall structure of a steel structure welding preheating and tempering treatment device according to the present invention;

[0018] Figure 2 This is a schematic diagram of the connection structure at the clamping mechanism of a steel structure welding preheating and tempering treatment device according to the present invention.

[0019] Figure 3 This is a rear view schematic diagram of the overall structure of a steel structure welding preheating and tempering treatment device according to the present invention;

[0020] Figure 4 This utility model relates to a preheating and tempering device for steel structure welding. Figure 3 A magnified structural diagram of region A in the middle.

[0021] In the diagram: 1. Workbench; 11. Controller; 2. Support base; 3. Clamping mechanism; 31. Positioning seat; 32. First connecting rod; 33. Clamping screw; 331. Limit block; 34. Moving seat; 35. Second connecting rod; 36. Clamping motor; 37. Clamping plate; 38. Center column; 4. Vertical plate; 5. Adjustment mechanism; 51. Adjusting worm gear; 52. Adjusting motor; 53. Limit rod; 54. Two-way lead screw; 55. Adjusting worm wheel; 6. Mounting base; 7. Electric push rod; 8. Semi-circular heating cover. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4This utility model provides a technical solution for a steel structure welding preheating and tempering treatment device: A steel structure welding preheating and tempering treatment device includes a workbench 1, characterized in that: support seats 2 are slidably installed on the left and right sides of the upper end face of the workbench 1, a clamping mechanism 3 is provided on the side wall of the support seat 2, a vertical plate 4 is fixedly installed on the left side of the upper end face of the workbench 1, an adjustment mechanism 5 is provided between the vertical plates 4 on the front and rear sides, mounting seats 6 are fixedly installed on the front and rear sides of the upper end face of the workbench 1, an electric push rod 7 is fixedly installed on the front and rear inner side walls of the mounting seat 6, and a semi-circular heating cover 8 is fixedly installed on the piston rod end of the electric push rod 7.

[0024] Furthermore, the clamping mechanism 3 includes a positioning seat 31 fixedly installed on the inner wall of the support seat 2. A first connecting rod 32 is rotatably installed in the inner cavity of the positioning seat 31. A clamping screw 33 is threadedly installed in the inner cavity of the positioning seat 31. A movable seat 34 is threadedly installed on the side wall end of the clamping screw 33. A second connecting rod 35 is rotatably installed on the inner side wall of the movable seat 34.

[0025] A clamping motor 36 is fixedly installed on the outer wall of the support base 2 via a frame. The output shaft end of the clamping motor 36 is fixedly connected to the clamping screw 33. A clamping plate 37 is rotatably installed on the end of the second connecting rod 35 away from the moving base 34. The end of the first connecting rod 32 away from the positioning base 31 is slidably installed in the inner cavity of the clamping plate 37. A central column 38 is rotatably installed in the middle of the side walls of the first connecting rod 32 and the second connecting rod 35.

[0026] There are a total of 4 sets of first connecting rods 32 and second connecting rods 35. The side wall of the clamping plate 37 is set as an arc surface, and the end of the clamping screw 33 is fixedly installed with a limit block 331.

[0027] It should be noted that after the worker places the steel tubular workpiece onto the outer wall of the clamping plate 37, the clamping screw 33 can be rotated by starting the clamping motor 36. Since the clamping screw 33 is threadedly connected to the moving seat 34, and the second connecting rods 35 are fixedly installed around the side wall of the moving seat 34, the moving seat 34 will drive the second connecting rods 35 to move closer to the positioning seat 31 under the limiting action of multiple sets of second connecting rods 35. Through the setting of the central column 38, the included angle between the first connecting rod 32 and the second connecting rod 35 will be increased, so that the four sets of clamping plates 37 can move away from each other, thereby achieving stable clamping of the steel tubular workpiece.

[0028] Furthermore, the adjustment mechanism 5 includes an adjustment worm gear 51 rotatably installed between the front and rear upright plates 4, an adjustment motor 52 fixedly installed on the left side of the upper end face of the worktable 1 via a frame, a limit rod 53 fixedly installed on the rear side of the inner cavity of the mounting base 6, and a bidirectional lead screw 54 rotatably installed on the front side of the inner cavity of the mounting base 6.

[0029] An adjusting worm gear 55 is fixedly installed on the left end face of the bidirectional lead screw 54. The adjusting worm gear 55 is meshed with the adjusting worm 51. The output shaft end of the adjusting motor 52 is fixedly connected to the adjusting worm 51. The threads on the left and right sides of the bidirectional lead screw 54 are opposite. The bidirectional lead screw 54 is threadedly connected to the support base 2. The limiting rod 53 is slidably connected to the support base 2.

[0030] It should be noted that the worker can start the adjusting motor 52 to make the adjusting worm 51 rotate. Since the adjusting worm 51 is meshed with the adjusting worm wheel 55, the adjusting worm wheel 55 will drive the bidirectional lead screw 54 to rotate. Since the threads on the left and right sides of the bidirectional lead screw 54 are opposite, the bidirectional lead screw 54 is threadedly connected to the support seat 2. At this time, the support seats 2 on the left and right sides will move closer to each other, so that the steel tubular workpieces on the left and right sides can move closer to each other.

[0031] Furthermore, the semi-circular heating covers 8 on the front and rear sides are symmetrically arranged, and a controller 11 is fixedly installed on the right side of the upper end face of the workbench 1. The controller 11 is electrically connected to the semi-circular heating cover 8.

[0032] Working principle:

[0033] During operation, after the worker places the steel tubular workpiece onto the outer wall of the clamping plate 37, the clamping screw 33 can be rotated by starting the clamping motor 36. Since the clamping screw 33 is threadedly connected to the moving seat 34, and the second connecting rod 35 is fixedly installed around the side wall of the moving seat 34, the moving seat 34 will drive the second connecting rod 35 to move closer to the positioning seat 31 under the limiting action of multiple sets of second connecting rods 35. Through the setting of the central column 38, the included angle between the first connecting rod 32 and the second connecting rod 35 will be increased, so that the four sets of clamping plates 37 can move away from each other to achieve stable clamping of the steel tubular workpiece.

[0034] Afterwards, the worker can start the adjusting motor 52 to make the adjusting worm 51 rotate. Since the adjusting worm 51 is meshed with the adjusting worm wheel 55, the adjusting worm wheel 55 will drive the double-acting screw 54 to rotate. Since the threads on the left and right sides of the double-acting screw 54 are opposite, the double-acting screw 54 is threadedly connected to the support seat 2. At this time, the support seats 2 on the left and right sides will move closer to each other, so that the steel tubular workpieces on the left and right sides can move closer to each other.

[0035] Finally, the worker can start the electric push rod 7 through the controller 11 to bring the semi-circular heating covers 8 on the front and rear sides closer to each other. After the semi-circular heating covers 8 on the front and rear sides come into contact, the worker can preheat and temper the steel structure tubular workpiece, which avoids the temperature difference in the welding area of ​​the welded parts being too large, reduces the probability of welding cracks in the steel structure tubular workpiece, and improves the working quality of the entire device.

[0036] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A steel structure welding preheating and tempering treatment device, comprising a workbench (1), characterized in that: The upper end face of the workbench (1) is slidably installed with support seats (2) on both sides, the side wall of the support seat (2) is provided with a clamping mechanism (3), the upper end face of the workbench (1) is fixedly installed with a vertical plate (4) on the left side, the vertical plate (4) is provided between the front and rear sides, and the adjusting mechanism (5) is provided between the vertical plate (4). The upper end face of the workbench (1) is fixedly installed with a mounting seat (6) on the front and rear sides, the front and rear inner side walls of the mounting seat (6) are fixedly installed with an electric push rod (7), and the piston rod end of the electric push rod (7) is fixedly installed with a semicircular heating cover (8).

2. The steel structure welding preheating and tempering treatment device according to claim 1, characterized in that: The clamping mechanism (3) comprises a positioning seat (31) fixedly installed on the inner wall of the support seat (2), a first connecting rod (32) rotatably installed in the inner cavity of the positioning seat (31), and a clamping screw rod (33) threadedly installed in the inner cavity of the positioning seat (31). The side wall end of the clamping screw rod (33) is threadedly installed with a moving seat (34), and the inner side wall of the moving seat (34) is rotatably installed with a second connecting rod (35).

3. The steel structure welding preheating and tempering treatment device according to claim 2, characterized in that: The outer side wall of the support seat (2) is fixedly installed with a clamping motor (36) through a rack, the output shaft end of the clamping motor (36) is fixedly connected with the clamping screw rod (33), one end of the second connecting rod (35) away from the moving seat (34) is rotatably installed with a clamping plate (37), and the end of the first connecting rod (32) away from the positioning seat (31) is slidably installed in the inner cavity of the clamping plate (37). The side wall middle part of the first connecting rod (32) and the second connecting rod (35) is rotatably installed with a center column (38).

4. The steel structure welding preheating and tempering treatment device according to claim 3, characterized in that: The first connecting rod (32) and the second connecting rod (35) are provided with four groups, the side wall of the clamping plate (37) is provided as a circular arc surface, and the end of the clamping screw rod (33) is fixedly installed with a limiting block (331).

5. The steel structure welding preheating and tempering treatment device according to claim 1, characterized in that: The adjusting mechanism (5) comprises an adjusting worm (51) rotatably installed between the front and rear vertical plates (4), an adjusting motor (52) fixedly installed on the left side of the upper end face of the workbench (1) through a rack, a limiting rod (53) fixedly installed in the inner cavity of the mounting seat (6), and a bidirectional screw rod (54) rotatably installed in the inner cavity of the mounting seat (6).

6. The steel structure welding preheating and tempering treatment device according to claim 5, characterized in that: The left end face of the bidirectional screw rod (54) is fixedly installed with an adjusting worm wheel (55), the adjusting worm wheel (55) is meshed and connected with the adjusting worm (51), the output shaft end of the adjusting motor (52) is fixedly connected with the adjusting worm (51), the left and right sides of the bidirectional screw rod (54) are opposite in screw direction, the bidirectional screw rod (54) is threadedly connected with the support seat (2), and the limiting rod (53) is slidably connected with the support seat (2).

7. The steel structure welding preheating and tempering treatment device according to claim 1, characterized in that: The front and rear semicircular heating covers (8) are symmetrically arranged, the upper end face of the workbench (1) is fixedly installed with a controller (11) on the right side, and the controller (11) is electrically connected with the semicircular heating cover (8).

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