Friction stir welding tool with heat dissipation device

Abstract

The utility model discloses a friction stir welding tool with a heat dissipation device, which comprises a bottom plate, at least two pressing devices and a base plate, the at least two pressing devices are symmetrically arranged on the bottom plate, the base plate is arranged on the bottom plate along a welding track of a plate, a sealing cavity is arranged in the base plate, an inlet pipe and an outlet pipe which are communicated with the sealing cavity are arranged on the base plate, and the heat dissipation device is arranged on the base plate. The other end of the inlet pipe is communicated with an outlet of the fin radiator, the other end of the outlet pipe is communicated with an inlet of the water tank, an outlet of the water tank is communicated with an inlet of the fin radiator, and the inlet of the water tank is above the outlet of the fin radiator; on the basis of an existing friction welding tool, the structure of the base plate is changed, the external radiator is additionally arranged, a plate at a welding seam is cooled through water circulation, the cooling effect is guaranteed, meanwhile, a bent flowing channel is formed in the base plate, the path of cooling water in the base plate and the contact area of the cooling water and the base plate are increased, and the cooling effect is improved. Heat transferred to the base plate from the plate is conveniently absorbed, and the cooling effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a friction stir welding tool with a heat dissipation device. Background Art

[0002] Friction stir welding has high welding efficiency, high joint strength, no pollution and low manufacturing cost. It is a new technology that is efficient, energy-saving and environmentally friendly. The use of friction stir welding technology to manufacture aluminum alloy subway car bodies has become a development trend at home and abroad.

[0003] While friction stir welding offers high welding efficiency and few internal defects, it also suffers from the problem of weakening the heat-affected zone (HAZ) performance of 6-series aluminum alloy welds due to the welding heat input. This is particularly true for thick plate friction stir welding, where the weld depth is large and the resulting heat is high, making it difficult to dissipate promptly. For example, the temperature of the entire workpiece after welding can reach 70°C, particularly at the car body coupler mounting base. Reducing the dwell time of the peak heat input in the HAZ and improving the weld HAZ strength and operating environment are currently key areas of research. Currently, only gas or water mist cooling systems installed next to the friction stir welding needle can effectively cool both the welded product and the stirring tip, which is effective for thin plates. However, this effect is less pronounced for thick plates. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the cooling effect of the cooling device in the prior art is poor during the thick plate welding process.

[0005] To solve the above technical problems, the present invention provides a technical solution: a friction stir welding tool with a heat dissipation device, comprising a base plate, a clamping device and a backing plate, at least two of the clamping devices being symmetrically arranged on the base plate, and the backing plate being arranged on the base plate along the welding trajectory of the plate, characterized in that: a sealed chamber is provided in the backing plate, an inlet pipe and an outlet pipe communicating with the sealed chamber are provided on the backing plate, the other end of the inlet pipe is communicated with the outlet of a finned radiator, the other end of the outlet pipe is communicated with the inlet end of a water tank, the outlet end of the water tank is communicated with the inlet end of the finned radiator, and the inlet end of the water tank is above the outlet of the finned radiator;

[0006] A guide plate is provided in the sealed chamber, and at least two guide plates form a curved coolant flow channel in the sealed chamber. The two ends of the flow channel are respectively connected to the inlet pipe and the outlet pipe, and fins parallel to the guide plates are also provided in the flow channel.

[0007] Furthermore, the base plate is made of copper.

[0008] Furthermore, a fan is provided on one side of the fin heat sink.

[0009] Furthermore, a fin condenser is provided between the fan and the fin radiator, and the fin condenser is connected to the refrigeration system through a condenser pipe.

[0010] The beneficial effects of the utility model are:

[0011] 1. Based on the existing friction welding tooling, the utility model changes the structure of the pad and adds an external radiator, which realizes cooling of the plate at the weld through water circulation to ensure the cooling effect. At the same time, the setting of the curved flow channel in the pad increases the path of the cooling water in the pad and the contact area between the two, which is convenient for absorbing the heat transferred from the plate to the pad. The fins are provided in the flow channel to further increase the contact area, promote heat transfer, and increase the cooling effect.

[0012] 2. The material of the pad of the utility model is copper, and the thermal conductivity of copper is used to increase the heat dissipation effect of the welding pad on the welding product.

[0013] 3. The radiator in the present invention has fins, and the fins have good heat exchange performance, thereby improving the heat dissipation effect of the radiator; and a fan is provided on one side of the finned radiator, through the action of the fan to achieve forced air cooling and heat dissipation of the radiator, reduce the temperature of the water flowing into the pad, solve the problem of poor heat dissipation effect of natural ventilation, increase the temperature difference at the inlet and outlet of the radiator, and ensure the cooling effect of the plate.

[0014] 4. In the present invention, a fin condenser is provided between the fan and the fin radiator. The fin condenser is connected to the refrigeration system through a condenser pipe. The radiator is cooled by the refrigeration system in conjunction with the fan. Compared with air cooling, the cooling effect of the refrigeration system is better.

[0015] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only partial schematic diagrams of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the structure of this application;

[0018] Figure 2 It is a structural diagram of the radiator, condenser and fan;

[0019] Figure 3Schematic diagram of the internal structure of the pad.

[0020] In the figure, 1-base plate, 2-pressing device, 3-pad, 4-fin radiator, 5-water tank, 6-fan, 7-fin condenser, 8-condenser pipe;

[0021] 31-sealed chamber, 32-inlet pipe, 33-outlet pipe, 34-guide plate, 35-fin;

[0022] 41-Import, 42-Export;

[0023] 51-input end, 52-output end;

[0024] A-plate, B-welding track. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in more detail with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", "fixation", and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0027] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only used for illustrative purposes and are not used to limit the scope of these messages or information. Example 1

[0028] like Figure 1-3As shown, a friction stir welding tool with a heat dissipation device includes a base plate 1, a clamping device 2 and a pad 3, at least two of the clamping devices 2 are symmetrically arranged on the base plate 1, and the pad 3 is arranged on the base plate 1 along the welding track B of the plate A, a sealed chamber 31 is provided in the pad 3, an inlet pipe 32 and an outlet pipe 33 connected to the sealed chamber 31 are provided on the pad 3, the other end of the inlet pipe 32 is connected to the outlet 42 of the fin radiator 4, the other end of the outlet pipe 33 is connected to the inlet end 51 of the water tank 5, and the outlet end 51 of the water tank 5 is connected to the outlet 52 of the water tank 5. 2 is connected to the inlet 41 of the fin radiator 4, and the inlet end 51 of the water tank 5 is above the outlet 42 of the fin radiator 4; the pad 3, the water tank 5 and the radiator form a water cooling device with natural heat dissipation. After the water in the water tank 5 dissipates heat through the radiator, it enters the pad 3 to absorb heat and then enters the water tank 5 for circulation to achieve cooling of the plate A. At the same time, the radiator has fins 35. Since the fins 35 have good heat exchange performance with the air, the heat dissipation effect of the radiator is improved. A circulation pump can also be added to the water tank 5 to increase the circulation speed of the water and improve the cooling effect.

[0029] Among them, a guide plate 34 is provided in the sealed chamber 31, and at least two guide plates 34 form a curved coolant flow channel in the sealed chamber 31. The two ends of the flow channel are respectively connected to the inlet pipe 32 and the outlet pipe 33, and the flow channel is also provided with fins 35 parallel to the guide plates 34; the setting of the curved flow channel in the pad 3 increases the path of the cooling water in the pad 3 and the contact area between the two, which is convenient for absorbing the heat transferred from the plate A to the pad 3, and the fins 35 are provided in the flow channel, which further increases the contact area, promotes heat transfer, and transfers the heat generated by welding to the water, thereby increasing the cooling effect.

[0030] Among them, the pad 3 is made of copper; the thermal conductivity of copper is used to increase the heat dissipation effect of the welding pad 3 on the welding product. At the same time, in order to reduce costs, the contact surface with the plate A and the fins 35 in the pad 3 can be made of copper, and the other parts can be made of steel plates, so as to achieve a balance between heat dissipation and cost. Example 2

[0031] like Figure 3 As shown, this embodiment is obtained by adding technical features such as a fan 6 on the basis of embodiment one. The remaining technical features are the same as those of embodiment one, and the similarities are not repeated here. Among them, the difference between this embodiment and embodiment one is that a fan 6 is provided on one side of the fin heat sink 4.

[0032] In this embodiment, after the circulating water passes through the pad 3, the water temperature will increase after absorbing the heat of the welding pad 3 and the internal fins 35. As the water temperature increases, the cooling effect of the circulating water on the welding pad 3 will decrease. In order to control the water temperature from being too high, the fan 6 is set on one side of the fin radiator 4. Through the action of the fan 6, the wind is forced to flow through the radiator, realizing forced air cooling and heat dissipation of the radiator, reducing the temperature of the water flowing into the pad 3, solving the problem of poor natural ventilation heat dissipation effect, increasing the temperature difference between the inlet and outlet of the radiator, and ensuring the cooling effect on the plate A. Example 3

[0033] like Figure 1 and 2 As shown, this embodiment is obtained by adding technical features such as a fin condenser 7 on the basis of Example 2. The remaining technical features are the same as those of Example 2, and the similarities are not repeated here. Among them, the difference between this embodiment and Example 1 is that a fin condenser 7 is provided between the fan 6 and the fin radiator 4, and the fin condenser 7 is connected to the refrigeration system through a condenser pipe 8.

[0034] In this embodiment, the fin condenser 7 is located between the fan 6 and the radiator. The refrigeration system cools the coolant and then transports it to the fin condenser 7, thereby reducing the temperature at the radiator. The refrigeration system cools the radiator in cooperation with the fan 6. Compared with air cooling, the cooling effect of the refrigeration system is better.

[0035] The process of using the overall technical solution formed by the above embodiments is as follows: This application is obtained by changing the structure of the pad 3 and adding a heat dissipation component on the basis of the existing friction welding tooling. Therefore, the use method of the friction welding tooling is the same as that in the prior art, and this application will not be repeated here.

[0036] Among them, when welding is carried out, the refrigeration system and the fan 6 are in working state. The water in the water tank 5 dissipates heat and cools down in the radiator and then enters the pad 3. The water absorbs the heat generated by welding and then enters the water tank 5 again to form a water circulation system. Since the refrigeration system and the fan 6 are in working state, the temperature around the radiator can be reduced and the heat dissipation effect of the radiator can be improved.

[0037] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are readily apparent to those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the appended claims.

Claims

1. A friction stir welding tool with a heat dissipation device, comprising a base plate, a clamping device, and a backing plate, wherein at least two of the clamping devices are symmetrically arranged on the base plate, and the backing plate is arranged on the base plate along the welding trajectory of the plate, characterized in that: A sealed chamber is provided in the backing plate, and an inlet pipe and an outlet pipe communicating with the sealed chamber are provided on the backing plate, the other end of the inlet pipe is communicated with the outlet of the fin radiator, the other end of the outlet pipe is communicated with the inlet end of the water tank, the outlet end of the water tank is communicated with the inlet end of the fin radiator, and the water tank inlet is above the outlet end of the fin radiator; A guide plate is provided in the sealed chamber, and at least two guide plates form a curved coolant flow channel in the sealed chamber. The two ends of the flow channel are respectively connected to the inlet pipe and the outlet pipe, and fins parallel to the guide plates are also provided in the flow channel.

2. The friction stir welding tool with a heat dissipation device according to claim 1, characterized in that: The base plate is made of copper.

3. The friction stir welding tool with a heat dissipation device according to claim 2, characterized in that: A fan is provided on one side of the fin heat sink.

4. The friction stir welding tool with a heat dissipation device according to claim 3, characterized in that: A fin condenser is provided between the fan and the fin radiator, and the fin condenser is communicated with the refrigeration system through a condensing pipe.

Images