Friction stir welding tool with a pin

Abstract

The utility model relates to new energy battery box technical field, specifically disclose the filler wire friction stir welding stirrer, include: equipment installation clamping piece, limiting structure board, limiting structure board fixed connection in the bottom of equipment installation clamping piece, the stirring main body, the stirring main body installation is at the bottom of limiting structure board, the utility model discloses the limiting structure board, the stirring main body, the welding wire stirring spiral groove and the wire feeding hole that set up, after making the welding wire be inserted in the inside of welding wire stirring spiral groove, adopt the filler wire welding, will directly stir the broken welding wire, and directly fills down, due to the filling of welding wire in the welding engineering, will not cause the defect of not having material filling to cause, thereby reducing the scrappage and water leakage and air leakage of battery box, effectively solve the quality defect that occurs in the friction stir welding welding process, reduce the repair quantity, personnel safety, improve the working environment, and further be favorable to the improvement enterprise production competitiveness.

Description

Technical Field

[0001] This utility model belongs to the field of new energy battery box technology, specifically relating to a stirring head for wire-filled friction stir welding. Background Technology

[0002] Against the backdrop of the rapid development of the new energy vehicle industry, the aluminum battery box, as a core load-bearing component, directly affects the safety and reliability of the entire vehicle through its welding quality. Currently, the industry generally adopts friction stir welding to connect aluminum alloy battery boxes. This technology has become the mainstream method for manufacturing lightweight aluminum alloy structural components due to its advantages such as low heat input, small deformation, and no welding defects.

[0003] However, welding aluminum battery boxes in actual production still faces significant challenges: the welding process based on the traditional stirring pin design has obvious limitations when dealing with the complex structure of the battery box. Specifically, the geometric parameters of the traditional stirring pin are not well matched with the actual gap of the aluminum battery box to be welded. When the diameter of the stirring pin does not match the gap of the weld, on the one hand, the pin cannot fully fill the gap area, resulting in insufficient plastic flow of the material during the welding process. The root of the weld is prone to forming an incompletely closed cavity (i.e., root hole defect). Such holes will significantly reduce the fatigue resistance of the weld. On the other hand, excessive cutting or uneven extrusion of the sheet metal by the stirring pin during the rotation and extrusion process will cause the metal in the heat-affected zone of the weld to be lost along the thickness direction, eventually forming a local thinning phenomenon, which directly affects the structural strength and pressure resistance of the battery box. Utility Model Content

[0004] The purpose of this invention is to provide a stirring head for filler wire friction stir welding, in order to solve the welding defects mentioned in the background art, such as thinning of the product and root holes, and the inability to match the stirring pin due to product gap issues, resulting in unqualified product quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A wire-filled friction stir welding head, comprising:

[0007] Equipment mounting clamps;

[0008] A limiting structure plate, which is fixedly connected to the bottom end of the equipment mounting clamp;

[0009] The mixing body is installed at the bottom of the limiting structure plate. The mixing body has a wire feeding hole inside, and a welding wire stirring spiral groove is inserted inside the wire feeding hole. The mixing body is provided with a limiting sleeve mounting seat on the outside. The limiting sleeve mounting seat has a mounting thread hole on the outside. The bottom end of the limiting sleeve mounting seat has a welding wire filling stirring pressing groove. A stirring needle is inserted at the bottom end of the welding wire filling stirring pressing groove.

[0010] Preferably, the stirring body is inserted and installed inside the limiting sleeve mounting base, and the inside of the welding wire stirring spiral groove is filled with welding wire.

[0011] Preferably, the mounting threaded hole is inserted through the outside of the limiting sleeve mounting base, and the limiting sleeve mounting base is a cylindrical hole groove.

[0012] Preferably, the device mounting clamp is welded to the top of the limiting structure plate, and a groove is formed on the outer side wall of the device mounting clamp.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention, through the design of a limiting structure plate, a stirring body, a welding wire stirring spiral groove, and a wire feeding hole, allows the welding wire to be directly agitated and filled downwards after being inserted into the welding wire stirring spiral groove during filler welding. This filler prevents defects caused by insufficient material during welding, thereby reducing battery box scrap and leaks. It effectively solves quality defects occurring during friction stir welding, reduces rework, improves personnel safety, enhances the working environment, and further improves the company's production competitiveness. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the structure of this utility model.

[0017] In the diagram: 1. Equipment mounting clamp; 2. Limiting structure plate; 3. Mixing body; 4. Welding wire mixing spiral groove; 5. Wire feeding hole; 6. Mounting threaded hole; 7. Mixing needle; 8. Welding wire filling mixing pressing groove; 9. Limiting sleeve mounting base. Detailed Implementation

[0018] 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.

[0019] Example 1:

[0020] Please see Figures 1-2 As shown, the filler wire friction stir welding head includes:

[0021] Equipment mounting clamp 1;

[0022] Limiting structure plate 2, which is fixedly connected to the bottom end of the equipment mounting clamp 1;

[0023] A mixing body 3 is installed at the bottom end of a limiting structure plate 2. The mixing body 3 has a wire feeding hole 5 inside, and a welding wire stirring spiral groove 4 is inserted inside the wire feeding hole 5. A limiting sleeve mounting seat 9 is provided on the outside of the mixing body 3. A mounting threaded hole 6 is provided on the outside of the limiting sleeve mounting seat 9. A welding wire filling stirring pressure groove 8 is provided at the bottom end of the limiting sleeve mounting seat 9. A stirring needle 7 is inserted at the bottom end of the welding wire filling stirring pressure groove 8. The mixing body 3 is inserted inside the limiting sleeve mounting seat 9. The welding wire stirring spiral groove 4 is filled with welding wire. The mounting threaded hole 6 is inserted through the outside of the limiting sleeve mounting seat 9. The limiting sleeve mounting seat 9 is a cylindrical slot. A device mounting clamp 1 is welded to the top end of the limiting structure plate 2. A groove is provided on the outer wall of the device mounting clamp 1.

[0024] Specifically, in the optimization practice of friction stir welding process for aluminum battery boxes, in order to systematically solve the quality defects such as thinning of weld and root holes caused by traditional stirring pin 7 welding, the stirring pin 7 body is first installed normally inside the sheath. After installation, the welding wire is fed into the wire feeding hole 5 in manual mode. Then, after the welding wire is installed, the equipment is driven to perform welding. The wire feeding frequency is controlled by the PLC and the equipment communication signal matching to control the welding speed and the amount of wire fed.

[0025] As described above, the standard-specification stirring needle 7 body is first precisely installed inside a special sheath. After mechanical assembly, the system switches to manual operation mode. A high-strength aluminum alloy welding wire with a diameter of 1.2mm is precisely fed into the pre-set wire feeding hole 5 at the tail of the stirring needle 7 via a high-precision wire feeding mechanism. Once the welding wire is in place, the automated welding program is started. At this time, the PLC control system collects welding speed sensor data in real time and interacts with the wire feeding drive module in a closed loop through a digital communication interface to dynamically match the welding travel speed with the welding wire supply, ensuring that the welding wire is inserted into the welding wire stirring spiral groove 4 at a uniform speed. During the welding process, the high-speed rotating stirring needle 7 fully breaks up the welding wire material and squeezes it downwards along the welding wire stirring spiral groove 4. The welding wire metal and the base material matrix achieve atomic-level metallurgical bonding under the action of frictional heat-mechanical coupling, forming a continuous and dense weld structure. This process effectively compensates for the material loss problem caused by the mismatch in the gap of the traditional stirring needle 7 through the active filling mechanism of the welding wire. On the one hand, the filler wire process directly replenishes the metal that is easily missing at the root of the weld, eliminating the root hole defect caused by incomplete material closure; on the other hand, the continuous material input compensates for the local metal thinning caused by the rotation and extrusion of the stirring pin 7, significantly improving the load-bearing capacity of the weld area; at the same time, the intelligent signal communication between the PLC and the equipment ensures the dynamic adaptability of welding parameters, and can maintain a stable process window when dealing with different wall thicknesses and assembly gaps of the battery box.

[0026] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models in the prior art, and the circuit connections also use conventional connection methods in the prior art, which will not be detailed here. Any content not described in detail in this specification belongs to the prior art known to those skilled in the art.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stirring head for wire-filled friction stir welding, characterized in that, include: Equipment mounting clamps (1); A limiting structure plate (2) is fixedly connected to the bottom end of the equipment mounting clamp (1); A stirring body (3) is installed at the bottom of a limiting structure plate (2). A wire feeding hole (5) is provided inside the stirring body (3). A welding wire stirring spiral groove (4) is inserted inside the wire feeding hole (5). A limiting sleeve mounting seat (9) is provided on the outside of the stirring body (3). A mounting thread hole (6) is provided on the outside of the limiting sleeve mounting seat (9). A welding wire filling stirring pressing groove (8) is provided at the bottom of the limiting sleeve mounting seat (9). A stirring needle (7) is inserted at the bottom of the welding wire filling stirring pressing groove (8).

2. The stirring head for wire-filled friction stir welding according to claim 1, characterized in that: The stirring body (3) is inserted and installed inside the limiting sleeve mounting base (9), and the inside of the welding wire stirring spiral groove (4) is filled with welding wire.

3. The stirring head for wire-filled friction stir welding according to claim 1, characterized in that: The mounting threaded hole (6) is inserted through the outside of the limiting sleeve mounting base (9), which is a cylindrical hole groove.

4. The stirring head for wire-filled friction stir welding according to claim 1, characterized in that: The equipment mounting clamp (1) is welded to the top of the limiting structure plate (2), and a groove is provided on the outer side wall of the equipment mounting clamp (1).

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