A friction stir welding cooling system

Abstract

The utility model discloses a friction stir welding cooling system, comprising a first water tank, a working support, a spindle head, a stirring needle, a water nozzle and a second water tank. The working support is fixed in the first water tank and is used to fix the product to be welded. The spindle head is located at the upper end of the product to be welded and can move left and right relative to the working support. The stirring needle is installed on the spindle head and is used to stir friction weld the product to be welded. The water nozzle is installed behind the working moving direction of the stirring needle and is located above the product to be welded, and is used to cool the weld of the friction stir welding. The first water tank is filled with water, and the second water tank is also filled with water and is connected with the first water tank and the water nozzle. The utility model has a simple structure, reduces the influence of heat and stress during the friction stir welding process, ensures uniform and controllable cooling, prevents residual stress from being generated in the welded product after the friction stir welding, controls the welding variable to be less than 1 / 3 of the plate thickness, and improves the quality of the friction stir welding.

Description

Technical Field

[0001] The utility model relates to the technical field of friction stir welding, in particular to a friction stir welding cooling system. Background Art

[0002] Friction stir welding is a solid-state welding method. Its principle is to use a stirring head to apply a certain amount of pressure while rotating at high speed to generate friction heat at the welding interface, heat the metal material to a plastic state, and then mix the metal materials together through the stirring action of the stirring head to finally form a uniform weld. The solid-state welding of metal materials is achieved through the interaction of friction heat, plastic deformation, stirring action and pressure. The welding process does not require the addition of additional welding materials, and can achieve efficient, environmentally friendly and high-quality welding.

[0003] At present, the friction stir welding process for general aluminum products cools the product weld by natural or air cooling. During the friction stir welding process, due to the influence of heat and stress, the welded product is easily deformed, affecting the welding quality and dimensional accuracy; after friction stir welding, if the cooling process is uneven, it is easy to cause uneven organizational structure in the welding area, affecting the performance of the weld; after friction stir welding, due to the heat and stress generated during the welding process, it is easy to cause residual stress in the welded product, affecting the stability and durability of the welded product.

[0004] In summary, the existing natural or air cooling methods for cooling the product welds have the disadvantages of slow cooling time and poor effect. Even if the anti-deformation tooling design is adopted, the product deformation is still large, and the correction process needs to be added to ensure the normal processing of the product. When the deformation reaches 2 / 3 of the plate thickness, the weld is prone to cracking during correction, resulting in product scrapping. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a friction stir welding cooling system with a simple structure based on the deficiencies of the above-mentioned technology, which can reduce the influence of heat and stress during friction stir welding, ensure uniform and controllable cooling, prevent residual stress from being generated in the welded product after friction stir welding, control the welding variables to be less than 1 / 3 of the plate thickness, and improve the quality of friction stir welding.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a stir friction welding cooling system, including a first water tank, a working support, a spindle head, a stirring needle, a water nozzle and a second water tank. The first water tank and the second water tank are both opened on the top and are arranged horizontally. The working support is fixed in the first water tank for fixing the product to be welded. The spindle head is located at the upper end of the product to be welded and can move left and right relative to the working support. The stirring needle is installed on the spindle head for performing stir friction welding on the product to be welded. The water nozzle is installed behind the working moving direction of the stirring needle and is located above the product to be welded for cooling the weld of stir friction welding. The first water tank is filled with water, and the second water tank is also filled with water and is connected to the first water tank and the water nozzle.

[0007] As a further elaboration of the present invention:

[0008] Preferably, the water surface of the first water tank does not exceed the welding surface of the product to be welded, and the second water tank is connected to the first water tank through a water inlet pipe. One end of the water inlet pipe is connected to the lower side of the right end of the first water tank, and a filter head is provided at the end of the other end. The filter head extends into the second water tank, and the filter head is used to prevent the water inlet pipe from being blocked.

[0009] Preferably, a water pump is provided in the second water tank, the water outlet end of the water pump is connected to a water outlet pipe, the other end of the water outlet pipe is connected to a water nozzle, and the water pump, the water outlet pipe and the water nozzle cooperate with each other so that the water nozzle sprays water to cool the weld of the stir friction welding.

[0010] Preferably, the placement position of the second water tank is lower than that of the first water tank, and under the cooperation of the water inlet pipe and the filter head, the water in the first water tank flows into the second water tank through the water inlet pipe.

[0011] Preferably, the spindle head drives the stirring needle to perform friction stir welding on the product to be welded from left to right, the stirring needle is vertically installed at the right end of the spindle head, and the water nozzle is vertically installed at the left end of the spindle head.

[0012] Preferably, it also includes a control device, which is electrically connected to the spindle head, the stirring needle and the water pump respectively, and controls their operation.

[0013] The beneficial effects of the utility model are:

[0014] First, the water nozzle of the utility model is installed behind the working moving direction of the stirring needle and is located above the product to be welded. It is used to cool the weld of the stir friction welding. It is effective and can prevent the welding product from being easily deformed due to the influence of heat and stress during the stir friction welding process, affecting the welding quality and dimensional accuracy. It ensures a uniform cooling process, prevents uneven organizational structure in the welding area, and prevents residual stress in the welding product. It overcomes the problems of slow cooling time and poor effect caused by cooling the product weld by natural or air cooling in the prior art.

[0015] Secondly, the water surface of the first water tank of the utility model does not exceed the welding surface of the product to be welded, the placement position of the second water tank is lower than the placement position of the first water tank, the second water tank is connected with the first water tank through a water inlet pipe, a water pump is arranged in the second water tank, the water outlet end of the water pump is connected with a water outlet pipe, the other end of the water outlet pipe is connected with a water nozzle, the first water tank and the second water tank form a circulation to ensure that the water nozzle sprays water to cool the weld of the stir friction welding, the cooling process is uniform and controllable, the welding variables can be controlled to be less than 1 / 3 of the plate thickness, the quality of stir friction welding is improved, and the weld cracking during the shape correction of the welded product is prevented, which causes the welded product to be scrapped.

[0016] Third, one end of the water inlet pipe of the utility model is connected to the lower side of the right end of the first water tank, and a filter head is provided at the end of the other end. The filter head extends into the second water tank. The filter head is used to prevent the water inlet pipe from being blocked, further ensuring the circulation continuity of the first water tank and the second water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] In the figure: 100, product to be welded; 1, first water tank; 2, working bracket; 3, spindle head; 4, stirring needle; 5, water nozzle; 6, second water tank; 7, water inlet pipe; 8, water outlet pipe; 9, water pump; 10, filter head. DETAILED DESCRIPTION

[0019] The structural principle and working principle of the utility model are further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1As shown, the utility model is a friction stir welding cooling system, comprising a first water tank 1, a working support 2, a spindle head 3, a stirring needle 4, a water nozzle 5 and a second water tank 6. The first water tank 1 and the second water tank 6 are both opened on the top and are arranged horizontally. The working support 2 is fixed in the first water tank 1 for fixing the product 100 to be welded. The spindle head 3 is located at the upper end of the product 100 to be welded and can move left and right relative to the working support 2. The stirring needle 4 is installed on the spindle head 3 for performing friction stir welding on the product 100 to be welded. The water nozzle 5 is installed behind the stirring needle 4 in the working moving direction and is located above the product 100 to be welded for cooling the weld of the friction stir welding. The first water tank 1 is filled with water, and the second water tank 6 is also filled with water and is connected to the first water tank 1 and the water nozzle 5.

[0021] like Figure 1 As shown, the water surface of the first water tank 1 does not exceed the welding surface of the product 100 to be welded, and the second water tank 6 is connected to the first water tank 1 through the water inlet pipe 7. One end of the water inlet pipe 7 is connected to the lower side of the right end of the first water tank 1, and the other end is provided with a filter head 10. The filter head 10 extends into the second water tank 6, and the filter head 10 is used to prevent the water inlet pipe 7 from being blocked.

[0022] like Figure 1 As shown, a water pump 9 is arranged in the second water tank 6, and the water outlet end of the water pump 9 is connected to a water outlet pipe 8, and the other end of the water outlet pipe 8 is connected to a water nozzle 5. The water pump 9, the water outlet pipe 8 and the water nozzle 5 cooperate with each other so that the water nozzle 5 sprays water to cool the weld of the stir friction welding.

[0023] like Figure 1 As shown, the placement position of the second water tank 6 is lower than that of the first water tank 1. Under the cooperation of the water inlet pipe 7 and the filter head 10, the water in the first water tank 1 flows into the second water tank 6 through the water inlet pipe 7. The first water tank 1 and the second water tank 6 form a cycle to ensure that the water nozzle 5 sprays water to cool the weld of the friction stir welding. The cooling process is uniform and controllable, and the welding variable can be controlled to be less than 1 / 3 of the plate thickness, thereby improving the quality of the friction stir welding and preventing the weld from cracking during the correction of the welded product, which causes the welded product to be scrapped.

[0024] In this embodiment, the spindle head 3 drives the stirring needle 4 to stir friction welding the product 100 to be welded from left to right, the stirring needle 4 is vertically installed at the right end of the spindle head 3, and the water nozzle 5 is vertically installed at the left end of the spindle head 3. The water nozzle 5 sprays water to cool the weld of the stir friction welding, which is highly effective and prevents the welded product from being easily deformed due to the influence of heat and stress during the stir friction welding process, affecting the welding quality and dimensional accuracy, ensuring uniform cooling process, preventing uneven organizational structure in the welding area, and preventing residual stress from being generated in the welded product, thereby overcoming the problems of slow cooling time and poor effect caused by cooling the weld of the product by natural or air cooling in the prior art.

[0025] In this embodiment, a control device (not shown in the figure) is also included. The control device is electrically connected to the spindle head 3, the stirring needle 4 and the water pump 9 respectively, and controls their operation.

[0026] In the description of the present application, it should be understood that the terms "vertical", "lateral", "left", "right", etc., indicating the 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 the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc., are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0027] The above is only a preferred embodiment of the present invention. Any slight modification, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A friction stir welding cooling system, characterized in that: It includes a first water tank, a working support, a spindle head, a stirring needle, a water nozzle and a second water tank. The first water tank and the second water tank are both opened on the top and are arranged horizontally. The working support is fixed in the first water tank and is used to fix the product to be welded. The spindle head is located at the upper end of the product to be welded and can move left and right relative to the working support. The stirring needle is installed on the spindle head and is used to stir friction welding the product to be welded. The water nozzle is installed behind the working moving direction of the stirring needle and is located above the product to be welded. It is used to cool the weld of stir friction welding. The first water tank is filled with water, and the second water tank is also filled with water and is connected with the first water tank and the water nozzle.

2. The friction stir welding cooling system according to claim 1, characterized in that: The water surface of the first water tank does not exceed the welding surface of the product to be welded. The second water tank is connected to the first water tank through a water inlet pipe. One end of the water inlet pipe is connected to the lower side of the right end of the first water tank, and a filter head is provided at the end of the other end. The filter head extends into the second water tank. The filter head is used to prevent the water inlet pipe from being blocked.

3. The friction stir welding cooling system according to claim 2, characterized in that: A water pump is arranged in the second water tank, the water outlet of the water pump is connected to a water outlet pipe, the other end of the water outlet pipe is connected to a water nozzle, and the water pump, the water outlet pipe and the water nozzle cooperate with each other so that the water nozzle sprays water to cool the weld of the stir friction welding.

4. The friction stir welding cooling system according to claim 3, characterized in that: The placement position of the second water tank is lower than that of the first water tank. Under the cooperation of the water inlet pipe and the filter head, the water in the first water tank flows into the second water tank through the water inlet pipe.

5. The friction stir welding cooling system according to claim 4, characterized in that: The spindle head drives the stirring pin to perform friction stir welding on the product to be welded from left to right. The stirring pin is vertically installed at the right end of the spindle head, and the water nozzle is vertically installed at the left end of the spindle head.

6. The friction stir welding cooling system according to any one of claims 3 to 5, characterized in that: It also includes a control device, which is electrically connected to the spindle head, the stirring needle and the water pump respectively, and controls their operation.

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