Device for preventing thermal deformation of welded steel

Abstract

The utility model discloses a device for preventing thermal deformation of welded steel, and belongs to the technical field of steel welding auxiliary equipment. Comprising a supporting frame, symmetrically-arranged elastic clamping units, a surrounding cooling assembly and a temperature control system. The elastic clamping unit drives a telescopic rod through a pneumatic air cylinder and is matched with a silica gel contact head and a spring piece buffer gasket, flexible clamping of steel is achieved, 20%-30% of clamping force fluctuation can be absorbed, the elastic clamping unit adapts to + / -5 mm dimensional deviation, and rigid damage is avoided. The surrounding cooling assembly adopts a red copper U-shaped pipe to surround a welding area, outer side spiral cooling fins are combined with cooling liquid circulation controlled by an electromagnetic valve, and the cooling efficiency is greatly improved. The temperature control system monitors the temperature in real time through an infrared sensor, cooling starting and stopping and pneumatic clamping are controlled in a linkage mode through a PLC, and the temperature fluctuation is controlled within + / -15 DEG C. Adjustable ground feet at the bottom of the supporting frame ensure the horizontal calibration precision; the device effectively solves the problems that a traditional rigid clamp damages base metal, heat dissipation lags behind, and the automation degree is low.

Description

Technical Field

[0001] This utility model relates to the field of steel valve well welding technology, and more specifically, to a device for preventing heat deformation of welded steel. Background Technology

[0002] In the production of steel valve wells, welding of steel components is often required. During welding, the localized high temperatures in the welding area can cause uneven thermal expansion and contraction of the material, generating thermal stress and inducing deformation, which seriously affects the dimensional accuracy and structural strength of the weldment. Existing devices for preventing deformation mostly use rigid clamping or a single cooling structure, which have the following shortcomings:

[0003] Traditional rigid clamps are fixed by bolts and other means, which can easily damage the base material due to uneven clamping force, and cannot be adapted to steel of different sizes;

[0004] Passive heat dissipation methods (such as natural cooling) are inefficient and cannot control the temperature of the heat-affected zone in real time;

[0005] Low automation and reliance on manual monitoring and adjustment make it difficult to meet the demands of high-efficiency welding. Therefore, there is an urgent need for a simple anti-deformation device that combines elastic clamping and intelligent heat dissipation. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a device for preventing thermal deformation of welded steel, comprising a support frame, symmetrically arranged elastic clamping units, a surrounding cooling assembly, and a temperature control system.

[0007] The elastic clamping unit includes a pneumatic cylinder, a telescopic rod, a silicone contact head, and a buffer pad.

[0008] The temperature control system monitors the temperature in real time using an infrared sensor and controls the start and stop of the surrounding cooling components.

[0009] Preferably, the elastic clamping units are symmetrically distributed on both sides of the support frame, and each set of silicone contact heads has an arc-shaped groove on its inner side. The telescopic rod is connected to the silicone contact head through a buffer pad.

[0010] Preferably, the buffer pad is a spring sheet used to absorb fluctuations in clamping force.

[0011] Preferably, the surrounding cooling assembly includes a U-shaped tube made of copper, and the U-shaped tube is arranged around the welding area; the outer side of the U-shaped tube is provided with spiral heat dissipation fins, and the coolant inlet of the U-shaped tube is connected to an external coolant circulation system through an electromagnetic valve.

[0012] Preferably, the temperature control system includes an infrared sensor and a controller. The infrared sensor is installed on the top of the support frame and aligned with the welding area. The controller integrates a PLC module, with its input end connected to the infrared sensor and its output end controlling the solenoid valve of the pneumatic cylinder and the cooling pump motor, respectively.

[0013] Preferably, the support frame is a rectangular steel structure frame with adjustable feet at the bottom for leveling and fixing the workbench.

[0014] Preferably, the silicone contact head is fixed to the inner side of the L-shaped adapter at the end of the telescopic rod, and the curvature of its arc-shaped groove is adapted to the surface of the steel to be welded.

[0015] Preferably, the coolant flow rate of the surrounding cooling assembly is adjusted by a controller, and the preset temperature thresholds are: a warning temperature of 200°C for the welding zone and a cooling stop temperature of 80°C.

[0016] Preferably, the pneumatic cylinder is connected to the air source via a solenoid valve, and the clamping force on one side is controlled at 50-100N by the air source pressure reducing valve.

[0017] Compared with existing technologies, the beneficial effects of this utility model are:

[0018] 1. Flexible clamping structure: The combination of silicone contact head and buffer pad achieves flexible clamping of steel, avoiding surface scratches caused by rigid contact, while adapting to weldment size deviations of ±5mm.

[0019] 2. Intelligent temperature control and heat dissipation: The infrared sensor provides real-time temperature feedback, and the controller automatically adjusts the cooling system to keep the temperature fluctuation in the welding heat-affected zone within ±15℃, effectively reducing the accumulation of thermal stress.

[0020] 3. Simple structure and easy maintenance: The core components adopt standardized pneumatic components and universal tubing, which reduces the assembly cost by 30% and supports quick replacement and maintenance, making it suitable for industrial mass production. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a device for preventing thermal deformation of welded steel according to the present invention.

[0022] Figure 2 This is an enlarged view of the structure of the elastic clamping unit in the device for preventing thermal deformation of welded steel proposed in this utility model;

[0023] Figure 3 This is a block diagram of the temperature control system in a device for preventing thermal deformation of welded steel proposed in this utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Referring to the figures, this embodiment provides a device for preventing thermal deformation of welded steel, including a support frame 101, symmetrically arranged elastic clamping units, a surrounding cooling assembly 103, and a temperature control system;

[0026] The elastic clamping unit includes a pneumatic cylinder 201, a telescopic rod 202, a silicone contact head 203, and a buffer pad 204.

[0027] As a preferred embodiment of this technical solution, the top of the support frame 101 can also be provided with an elastic clamping unit to facilitate the clamping of the steel to be welded. A pneumatic cylinder 201 is provided at the top, and the telescopic rod of the pneumatic cylinder 201 presses down on the steel to be welded to further ensure the stability of the steel during welding.

[0028] The temperature control system monitors the temperature in real time through infrared sensor 104 and controls the start and stop of the surrounding cooling assembly 103.

[0029] Furthermore, the elastic clamping units are symmetrically distributed on both sides of the support frame 101, and each set of silicone contact heads 203 has an arc-shaped groove on its inner side. The telescopic rod 202 is connected to the silicone contact head 203 through a buffer pad 204.

[0030] Furthermore, the buffer pad 204 is a spring sheet used to absorb fluctuations in clamping force.

[0031] Furthermore, the surrounding cooling assembly 103 includes a U-shaped tube made of copper, and the U-shaped tube is arranged around the welding area; the outer side of the U-shaped tube body is provided with spiral heat dissipation fins, and the coolant inlet of the U-shaped tube is connected to an external coolant circulation system through an electromagnetic valve.

[0032] Furthermore, the temperature control system includes an infrared sensor 104 and a controller 301. The infrared sensor 104 is installed on the top of the support frame 101 and aligned with the welding area. The controller 301 integrates a PLC module, with its input end connected to the infrared sensor 104 and its output end controlling the solenoid valve 302 of the pneumatic cylinder 201 and the cooling pump motor 304, respectively.

[0033] Furthermore, the support frame 101 is a rectangular steel structure frame with adjustable feet at the bottom for leveling and fixing the workbench.

[0034] Furthermore, the silicone contact head 203 is fixed to the inner side of the L-shaped adapter at the end of the telescopic rod 202, and the curvature of its arc-shaped groove is adapted to the surface of the steel to be welded.

[0035] Furthermore, the coolant flow rate of the surrounding cooling assembly 103 is adjusted by the controller 301, and the preset temperature threshold is: 200°C for the welding zone warning temperature and 80°C for the cooling stop temperature.

[0036] Furthermore, the pneumatic cylinder 201 is connected to the air source through the solenoid valve 302, and the clamping force on one side is controlled at 50-100N by the air source pressure reducing valve.

[0037] Here, we will provide a more detailed explanation of how the above embodiments can be used in daily production:

[0038] 1. Installation and debugging:

[0039] The support frame 101 is fixed to the welding workbench using anchor bolts, and the level is adjusted to within 0.5 mm / m using adjustable feet at the bottom. The air source is connected to the solenoid valve 302 of the pneumatic cylinder 201 via a quick-connect coupling. Simultaneously, the inlet and outlet of the cooling pipe 103 are connected to the external coolant circulation system, including the water pump and reservoir. After power is connected, the temperature threshold is set via the controller 301 operating interface: a warning temperature of 200℃ for the welding area and a cooling stop temperature of 80℃.

[0040] 2. Clamping operation:

[0041] The steel to be welded is placed in the central positioning area of ​​the support frame 101, and the pneumatic system is activated via the control panel. The piston rod of the pneumatic cylinder 201 extends, driving the telescopic rod 202 to move the L-shaped adapter towards the steel until the arc-shaped groove on the inner side of the silicone contact head 203 completely conforms to the steel surface. At this time, the spring structure of the buffer pad 204 automatically absorbs 20%-30% of the clamping force fluctuations caused by uneven workpiece surface or dimensional deviations. The clamping force on one side is controlled at 50-100N by the air source pressure reducing valve, achieving symmetrical elastic clamping. Here, to further enhance the stability of the steel, it can also be manually clamped or pressed down using the pneumatic cylinder located at the top of the support frame 101, thereby making the clamping more stable.

[0042] 3. Welding process control:

[0043] After the welding equipment is started, the infrared sensor 104 collects the surface temperature signal of the welding area in real time and transmits it to the controller 301. When the temperature rises to the preset threshold of 200℃, the controller 301 outputs a signal to trigger the solenoid valve 302 to open, and at the same time starts the cooling pump motor 304, so that the water-based antifreeze coolant flows through the cooling pipe 103 at a flow rate of 0.5L / min. The spiral heat dissipation fins on the outside of the copper cooling pipe arranged around the welding area quickly absorb the welding heat input through heat conduction, keeping the temperature of the heat-affected zone within a safe range. When the temperature drops to 80℃, the controller 301 automatically cuts off the power to the cooling pump motor 304 and the solenoid valve 302, stopping the cooling cycle.

[0044] 4. Unload the workpiece:

[0045] After welding is completed and the cooling system stops operating, the pneumatic system is turned off by the control panel. The piston rod of the pneumatic cylinder 201 retracts, which drives the telescopic rod 202 and the silicone contact head 203 to reset, making it easy to remove the welded part without deformation.

[0046] In the above embodiments and actual use, compared with traditional welding clamps, the following advantages are available:

[0047] Flexible clamping structure: The combination of silicone contact head and buffer pad achieves flexible clamping of steel, avoiding surface scratches caused by rigid contact, while accommodating weldment size deviations of ±5mm.

[0048] Intelligent temperature control and heat dissipation: Infrared sensors provide real-time temperature feedback, and the controller automatically adjusts the cooling system to keep the temperature fluctuation in the welding heat-affected zone within ±15℃, effectively reducing the accumulation of thermal stress.

[0049] Simple structure and easy maintenance: The core components use standardized pneumatic components and universal tubing, reducing assembly costs by 30% and supporting quick replacement and maintenance, making it suitable for industrial mass production.

[0050] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be covered within the protection scope of this utility model.

[0051] Furthermore, it should be understood in the description of this utility model that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Furthermore, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A device for preventing heat deformation of welded steel, characterized in that, It includes a support frame (101), symmetrically arranged elastic clamping units, a surrounding cooling assembly (103), and a temperature control system; The elastic clamping unit (102) includes a pneumatic cylinder (201), a telescopic rod (202), a silicone contact head (203), and a buffer pad (204). The temperature control system monitors the temperature in real time through an infrared sensor (104) and controls the start and stop of the surrounding cooling assembly (103).

2. The device for preventing heat deformation of welded steel according to claim 1, characterized in that: The elastic clamping units are symmetrically distributed on both sides of the support frame (101). Each set of silicone contact heads (203) has an arc-shaped groove on the inner side. The telescopic rod (202) is connected to the silicone contact head (203) through a buffer pad (204).

3. The device for preventing heat deformation of welded steel according to claim 1, characterized in that: The buffer pad (204) is a spring sheet used to absorb fluctuations in clamping force.

4. The device for preventing heat deformation of welded steel according to claim 1, characterized in that: The surrounding cooling assembly (103) includes a U-shaped tube made of copper, and the U-shaped tube is arranged around the welding area; the outer side of the U-shaped tube is provided with spiral heat dissipation fins, and the coolant inlet of the U-shaped tube is connected to an external coolant circulation system through an electromagnetic valve.

5. The device for preventing heat deformation of welded steel according to claim 1, characterized in that: The temperature control system includes an infrared sensor (104) and a controller (301). The infrared sensor (104) is installed on the top of the support frame (101) and aligned with the welding area. The controller (301) integrates a PLC module, with the input end connected to the infrared sensor (104) and the output end controlling the solenoid valve (302) of the pneumatic cylinder (201) and the cooling pump motor (304).

6. The device for preventing thermal deformation of welded steel according to claim 1, characterized in that: The support frame (101) is a rectangular steel structure frame with adjustable feet at the bottom for leveling and fixing the workbench.

7. The device for preventing heat deformation of welded steel according to claim 1, characterized in that: The silicone contact head (203) is fixed to the inner side of the L-shaped adapter at the end of the telescopic rod (202), and the curvature of its arc groove is adapted to the surface of the steel to be welded.

8. The device for preventing heat deformation of welded steel according to claim 1, characterized in that: The coolant flow rate of the surrounding cooling assembly (103) is adjusted by the controller (301), and the preset temperature threshold is: 200°C for the welding zone warning temperature and 80°C for the cooling stop temperature.

9. The device for preventing heat deformation of welded steel according to claim 1, characterized in that: The pneumatic cylinder (201) is connected to the air source through a solenoid valve (302), and the clamping force on one side is controlled at 50-100N by the air source pressure reducing valve.

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