Quick-release friction stir welding tool and friction welding equipment

Abstract

The utility model provides a quick disassembly type friction stir welding cutter and friction welding equipment, and relates to the technical field of friction welding, the quick disassembly type friction stir welding cutter comprises a steel cutter body and a hard alloy cutter bit which are designed in a split mode, the steel cutter body is provided with a first end and a second end which are opposite, and the end face of the first end is provided with a containing groove; the containing groove and the steel tool body are concentrically arranged, internal threads are formed in the inner wall of the containing groove, a stirring head is arranged at the head of the hard alloy tool bit, a connecting column is arranged at the tail of the hard alloy tool bit, external threads are arranged on the peripheral face of the connecting column, and the connecting column is assembled in the containing groove in a threaded mode. Compared with the prior art, the tool bit and the tool body which are separated from each other are adopted, so that the whole tool has better head rigidity and wear resistance and can have certain toughness, the assembly mode of threaded connection is convenient to disassemble and assemble, the assembly efficiency is higher, different tool bits can be quickly disassembled, and the applicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of friction welding, and particularly to a quick-disassembly friction stir welding tool and a friction welding device. Background Technique

[0002] Friction welding is a special welding technique for connecting metal materials. It connects workpieces by the heat energy generated by friction without melting the materials. The process involves rotating one workpiece (usually a tool) at high speed in contact with a fixed part to generate frictional heat energy. The heat energy melts the solder in the middle or directly heats the interface, enabling a metallurgical bond to form under pressure without material melting. The welded joint has good quality, high strength, a fine grain size at the joint seam, and excellent fatigue performance. It has high production efficiency, stable process, and good repeatability. It is suitable for welding dissimilar metals, such as carbon steel and stainless steel, and high-speed steel combinations.

[0003] Existing friction welding tools usually adopt an integral steel design, resulting in insufficient rigidity of the tool head, which in turn leads to low friction welding efficiency. Moreover, the friction welding temperature is high, and the tool material being in a high-temperature state for a long time will cause loss of wear life. While preparing the tool with an integral alloy material, there is a problem of insufficient toughness, resulting in a significant reduction in service life. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a quick-disassembly friction stir welding tool and a friction welding device. It adopts a split structure, can simultaneously have rigidity and wear resistance, and also has a certain degree of toughness. It is convenient and quick to disassemble, and has better applicability.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In a first aspect, the utility model provides a quick-disassembly friction stir welding tool, including a steel tool body with a split design and a cemented carbide tool head. The steel tool body has opposite first and second ends. An accommodation groove is formed on the end face of the first end. The accommodation groove is concentric with the steel tool body, and an internal thread is provided on the inner wall of the accommodation groove. A stirring head is provided at the head of the cemented carbide tool head, and a connecting column is provided at the tail of the cemented carbide tool head. An external thread is provided on the outer peripheral surface of the connecting column, and the connecting column is threadedly assembled in the accommodation groove.

[0007] In an optional embodiment, a positioning step is further provided on the inner wall of the accommodation groove, and a positioning boss is provided on the connecting column. The positioning boss abuts against the positioning step.

[0008] In an optional embodiment, a first cooling channel is further formed on the bottom wall of the accommodation groove. The first cooling channel penetrates to the second end and is used to communicate with an external cooling pipeline.

[0009] In an alternative embodiment, a second cooling channel is provided inside the cemented carbide cutting head. One end of the second cooling channel communicates with the first cooling channel, and the other end communicates with the outer peripheral surface of the cemented carbide cutting head.

[0010] In an alternative embodiment, a plurality of cooling inclined holes are formed in the outer peripheral surface of the cemented carbide cutting head. The plurality of cooling inclined holes are spaced apart and all penetrate through to the second cooling channel.

[0011] In an alternative embodiment, the first cooling channel is concentrically arranged with the steel tool body, the second cooling channel is concentrically arranged with the cemented carbide cutting head, the outer sides of the plurality of cooling inclined holes are distributed along the same circumference on the outer peripheral surface of the cemented carbide cutting head, and the depths of the plurality of cooling inclined holes are the same.

[0012] In an alternative embodiment, each of the cooling inclined holes extends obliquely relative to the second cooling channel.

[0013] In an alternative embodiment, the diameter of the head of the cemented carbide cutting head gradually decreases in a direction close to the stirring head, so as to form a cutting head inclined surface on the circumferential surface of the cemented carbide cutting head.

[0014] In an alternative embodiment, the outer diameter of the cemented carbide cutting head is the same as the outer diameter of the steel tool body, so that the circumferential surface of the cemented carbide cutting head is flush with the circumferential surface of the steel tool body.

[0015] In a second aspect, the present utility model provides a friction welding device, including a machine table body and the quick-release friction stir welding tool according to any one of the foregoing embodiments, and the steel tool body is detachably mounted on the machine table body.

[0016] The beneficial effects of the embodiments of the present utility model include:

[0017] The quick-release friction stir welding tool provided by the embodiments of the present utility model adopts a split design of a steel tool body and a cemented carbide cutting head. A receiving groove is formed in the end surface of the first end of the steel tool body, an internal thread is provided on the inner wall of the receiving groove, a stirring head is provided at the head of the cemented carbide cutting head, a connecting column is provided at the tail of the cemented carbide cutting head, and an external thread is provided on the outer peripheral surface of the connecting column, so that the connecting column can be threadedly assembled in the receiving groove. Compared with the prior art, the present utility model adopts a split cutting head and tool body, so that the overall tool has better head rigidity and wear resistance, and at the same time can have a certain toughness. Moreover, the threaded connection assembly method is convenient for disassembly and assembly, has higher assembly efficiency, and can realize quick disassembly of different cutting heads, and has better applicability. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the overall structure of the quick-release friction stir welding tool provided by the embodiment of the present utility model;

[0020] Figure 2 Exploded structure diagram of the quick-release friction stir welding tool provided by the embodiment of the present utility model;

[0021] Figure 3 Cross-sectional view of the exploded structure of the quick-release friction stir welding tool provided by the embodiment of the present utility model;

[0022] Figure 4 Cross-sectional view of the overall structure of the quick-release friction stir welding tool provided by the embodiment of the present utility model.

[0023] Reference numerals:

[0024] 100 - Quick-release friction stir welding tool; 110 - Steel tool body; 111 - First end; 113 - Second end; 115 - Accommodating groove; 117 - First cooling channel; 130 - Cemented carbide tool tip; 131 - Stirring head; 133 - Connecting column; 135 - Positioning step; 137 - Positioning boss; 139 - Second cooling channel; 150 - Cooling inclined hole; 151 - Tool tip inclined surface. Detailed implementation manners

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0027] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model 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 thus cannot be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0029] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] As disclosed in the background art, the friction welding tools in the prior art usually adopt an integral design. However, the cutting tool head of the steel tool has insufficient rigidity, which leads to low friction welding efficiency. Moreover, the friction welding temperature is high, and the tool material being in a high temperature state for a long time will cause loss and wear of the service life. Although the alloy pouring can solve the above problems, its toughness is insufficient, resulting in a great reduction in the service life. In addition, the integral design makes the cutting tool head unable to be replaced, and the applicability is poor.

[0032] Moreover, the conventional cooling of the tool is usually achieved by spraying cooling water externally, which requires an additional design of a spraying device, with a complex structure and high cost.

[0033] To solve the above problems, the present utility model provides a new type of quick-release friction stir welding tool and friction welding equipment, and the structure will be introduced in detail below.

[0034] Please refer to Figures 1 to 4 , this embodiment provides a quick-release friction stir welding tool 100, which uses a split tool head and a tool body, enabling the overall tool to have better head rigidity and wear resistance, while also having a certain degree of toughness. Moreover, the threaded connection assembly method is convenient for disassembly and assembly, with higher assembly efficiency, and can achieve quick release of different tool heads, having better applicability.

[0035] The quick-release friction stir welding tool 100 provided in this embodiment includes a steel tool body 110 and a cemented carbide tool head 130 with a split design. The steel tool body 110 has opposite first end 111 and second end 113. An accommodation groove 115 is formed on the end face of the first end 111. The accommodation groove 115 is concentric with the steel tool body 110, and internal threads are provided on the inner wall of the accommodation groove 115. A stirring head 131 is provided at the head of the cemented carbide tool head 130, and a connecting column 133 is provided at the tail of the cemented carbide tool head 130. External threads are provided on the outer peripheral surface of the connecting column 133, and the connecting column 133 is threadedly assembled in the accommodation groove 115.

[0036] It should be noted that the use of a split design for the steel tool body 110 and the cemented carbide tool head 130 enables the overall tool to have better head rigidity and wear resistance, while also having a certain degree of toughness. And an accommodation groove 115 is formed on the end face of the first end 111 of the steel tool body 110. Internal threads are provided on the inner wall of the accommodation groove 115. A stirring head 131 is provided at the head of the cemented carbide tool head 130, and a connecting column 133 is provided at the tail of the cemented carbide tool head 130. External threads are provided on the outer peripheral surface of the connecting column 133, enabling the connecting column 133 to be threadedly assembled in the accommodation groove 115. The threaded connection assembly method is convenient for disassembly and assembly, with higher assembly efficiency, and can achieve quick release of different tool heads, having better applicability.

[0037] It should be noted that in this embodiment, the steel tool body 110 is made of ordinary steel material, having a certain degree of toughness and extending the service life, while the cemented carbide tool head 130 is made of cemented carbide, enabling the tool to have better head rigidity and wear resistance.

[0038] In this embodiment, a positioning step 135 is further provided on the inner wall of the accommodation groove 115, and a positioning boss 137 is provided on the connecting column 133. The positioning boss 137 abuts against the positioning step 135. Specifically, the positioning step 135 is annular and can allow the lower part of the connecting column 133 to extend in, and the positioning boss 137 just abuts against the positioning step 135, thereby ensuring that the cemented carbide tool head 130 is installed in place and avoiding the situation of improper installation.

[0039] In this embodiment, a first cooling channel 117 is further provided in the bottom wall of the accommodation groove 115. The first cooling channel 117 penetrates through to the second end 113 and is used for communicating with an external cooling pipeline. Specifically, the first cooling channel 117 extends linearly to the second end 113 of the steel cutting tool body 110 and is connected to the external cooling pipeline, so that the heat of the steel cutting tool body 110 can be quickly removed, and then the heat of the cemented carbide cutting head 130 can be removed.

[0040] Furthermore, a second cooling channel 139 is provided in the cemented carbide cutting head 130. One end of the second cooling channel 139 is communicated with the first cooling channel 117, and the other end is communicated to the outer peripheral surface of the cemented carbide cutting head 130. Specifically, the second cooling channel 139 is correspondingly communicated with the first cooling channel 117, so that heat can flow from the second cooling channel 139 to the first cooling channel 117 to achieve cooling.

[0041] In this embodiment, a plurality of cooling inclined holes 150 are provided on the outer peripheral surface of the cemented carbide cutting head 130. The plurality of cooling inclined holes 150 are spaced apart and all penetrate through to the second cooling channel 139. Through the plurality of cooling inclined holes 150, the heat generated near the stirring head 131 can be effectively removed, and the cooling effect can be improved.

[0042] Furthermore, the first cooling channel 117 is concentrically arranged with the steel cutting tool body 110, the second cooling channel 139 is concentrically arranged with the cemented carbide cutting head 130, the outer sides of the plurality of cooling inclined holes 150 are distributed on the outer peripheral surface of the cemented carbide cutting head 130 along the same circumference, and the depths of the plurality of cooling inclined holes 150 are the same. Specifically, both the steel cutting tool body 110 and the cemented carbide cutting head 130 are of a rotary body structure, and both the first cooling channel 117 and the second cooling channel 139 are linear channels, so as to effectively remove heat.

[0043] In this embodiment, each cooling inclined hole 150 extends obliquely relative to the second cooling channel 139 and extends outward from the second cooling channel 139 in the direction close to the stirring head 131, so that the heat generated by the stirring head 131 can be removed as quickly as possible.

[0044] In this embodiment, the diameter of the head of the cemented carbide cutting head 130 gradually decreases in the direction close to the stirring head 131, so as to form a cutting head inclined surface 151 on the peripheral surface of the cemented carbide cutting head 130. Specifically, the plurality of cooling inclined holes 150 are provided on the cutting head inclined surface 151, which can further shorten the depth of the second cooling channel 139 to quickly remove heat.

[0045] In other preferred embodiments of the present utility model, the plurality of cooling inclined holes 150 can also be distributed in a spiral shape. Therefore, during the rotation of the cemented carbide cutting head 130, the hot air near the stirring head 131 can be quickly removed to achieve air cooling.

[0046] In this embodiment, the outer diameter of the cemented carbide cutting head 130 is the same as that of the steel cutting tool body 110, so that the circumferential surface of the cemented carbide cutting head 130 is flush with the circumferential surface of the steel cutting tool body 110. Specifically, the cemented carbide cutting head 130 and the steel cutting tool body 110 are spliced to form an integral rotary body structure to ensure the neatness of the appearance and facilitate alignment and cooperation.

[0047] It should be noted that in this embodiment, a through internal cooling channel is adopted, that is, the first cooling channel 117, the second cooling channel 139 and the cooling inclined hole 150 form an internal cooling channel, which can effectively reduce and take away the heat generated during the friction welding process, and avoid the damage to the cutting head caused by high temperature.

[0048] The embodiment of the present utility model also provides a friction welding device, which includes a machine table body and the aforementioned quick-disassembly friction stir welding tool 100. The quick-disassembly friction stir welding tool 100 includes a steel cutting tool body 110 and a cemented carbide cutting head 130 with a split design. The steel cutting tool body 110 has opposite first end 111 and second end 113. A receiving groove 115 is provided on the end face of the first end 111. The receiving groove 115 is concentric with the steel cutting tool body 110, and an internal thread is provided on the inner wall of the receiving groove 115. A stirring head 131 is provided at the head of the cemented carbide cutting head 130, and a connecting column 133 is provided at the tail of the cemented carbide cutting head 130. An external thread is provided on the outer circumferential surface of the connecting column 133. The connecting column 133 is threadedly assembled in the receiving groove 115. The steel cutting tool body 110 is detachably installed on the machine table body. Among them, the basic structure and working principle of the machine table body can refer to the friction welding device in the prior art.

[0049] To sum up, the quick-disassembly friction stir welding tool 100 and the friction welding device provided in this embodiment adopt a split design of the steel cutting tool body 110 and the cemented carbide cutting head 130, and a receiving groove 115 is provided on the end face of the first end 111 of the steel cutting tool body 110. An internal thread is provided on the inner wall of the receiving groove 115. A stirring head 131 is provided at the head of the cemented carbide cutting head 130, and a connecting column 133 is provided at the tail of the cemented carbide cutting head 130. An external thread is provided on the outer circumferential surface of the connecting column 133, so that the connecting column 133 can be threadedly assembled in the receiving groove 115. Compared with the prior art, the present utility model adopts a split cutting head and cutting tool body, so that the overall cutting tool has better head rigidity and wear resistance, and at the same time can have a certain toughness. Moreover, the threaded connection assembly method is convenient for disassembly and assembly, has higher assembly efficiency, and can realize the quick disassembly of different cutting heads, and has better applicability.

[0050] Furthermore, in this embodiment, the required size of the cutting head can be quickly replaced according to the part requirements without replacing the entire tool. At the same time, a standardized threaded connection module is adopted between the cemented carbide cutting head 130 and the steel tool body 110, which is conducive to the standardization of tool manufacturing. In this embodiment, the cutting head is made of cemented carbide material, replacing the conventional tool steel material, effectively utilizing the wear resistance and high temperature resistance characteristics of cemented carbide. The tool body is made of conventional steel material, retaining the overall toughness of the tool and avoiding the defect of excessive rigidity of cemented carbide. The combination of the two maximizes the service life of the tool. Moreover, since the cutting head is made of cemented carbide material, the tool rigidity is improved, which brings an improvement in machining efficiency. In addition, this embodiment adopts an internal cooling structure, and the high temperature generated during the friction welding process is effectively reduced and removed through the internal cooling channel, which brings damage to the cutting head and extends the tool life.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A quick-release friction stir welding tool, characterized in that It includes a steel tool body with a split design and a cemented carbide cutting head. The steel tool body has opposite first and second ends. An accommodation groove is formed on the end face of the first end, and internal threads are provided on the inner wall of the accommodation groove. A stirring head is provided at the head of the cemented carbide cutting head, and a connecting column is provided at the tail of the cemented carbide cutting head. External threads are provided on the outer peripheral surface of the connecting column, and the connecting column is threadedly assembled in the accommodation groove; A first cooling channel is further formed on the bottom wall of the accommodation groove. The first cooling channel penetrates to the second end and is used to communicate with an external cooling pipeline. A second cooling channel is arranged inside the cemented carbide cutting head. One end of the second cooling channel communicates with the first cooling channel, and the other end communicates with the outer peripheral surface of the cemented carbide cutting head.

2. The quick-release friction stir welding tool according to claim 1, wherein, A positioning step is further provided on the inner wall of the accommodation groove, and a positioning boss is provided on the connecting column. The positioning boss abuts against the positioning step.

3. The quick-release friction stir welding tool according to claim 1, characterized in that A plurality of cooling inclined holes are formed on the outer peripheral surface of the cemented carbide cutting head. The plurality of cooling inclined holes are spaced apart and all penetrate to the second cooling channel.

4. The quick-release friction stir welding tool according to claim 3, characterized in that, The first cooling channel is concentrically arranged with the steel tool body, the second cooling channel is concentrically arranged with the cemented carbide cutting head. The outer sides of the plurality of cooling inclined holes are distributed on the outer peripheral surface of the cemented carbide cutting head along the same circumference, and the depths of the plurality of cooling inclined holes are the same.

5. The quick-release friction stir welding tool according to claim 4, characterized in that, Each of the cooling inclined holes extends obliquely relative to the second cooling channel.

6. The quick-release friction stir welding tool according to claim 1, wherein, The diameter of the head of the cemented carbide cutting head gradually decreases in the direction close to the stirring head, so as to form a tool head inclined surface on the peripheral surface of the cemented carbide cutting head.

7. The quick-release friction stir welding tool according to claim 1, characterized in that, The outer diameter of the cemented carbide cutting head is the same as the outer diameter of the steel tool body, so that the peripheral surface of the cemented carbide cutting head is flush with the peripheral surface of the steel tool body.

8. A friction welding device, characterized in that, It includes a machine table body and a quick-release friction stir welding tool according to any one of claims 1-7. The steel tool body is detachably installed on the machine table body.

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