A welding tool for friction stir welding of thin-walled parts

Abstract

The utility model relates to the field of welding technology, and specifically is a welding tool for stir friction welding of thin-walled parts. The utility model includes a tool base for fixing a bottom plate and a cover plate, a heating and cooling assembly is arranged on the top of the tool base, the bottom plate and the cover plate are positioned and fixed on the top of the heating and cooling assembly in sequence, and the heating and cooling assembly includes a heating module for heating the bottom plate and a water cooling channel for cooling the weld between the bottom plate and the cover plate. The utility model can effectively improve the flatness of thin-walled parts after stir friction welding.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a welding tool for friction stir welding of thin-walled parts. Background Art

[0002] Water cooling plate is a common heat dissipation device, which is widely used in electronic products and computer fields.

[0003] Traditional water cooling panels are mostly made of Figure 5 The thin plate-shaped bottom plate b and the cover plate a shown are combined to form a combination, wherein the cover plate a has a water flow groove a1 formed by protruding from the inner wall to the outer wall. After the cover plate a and the bottom plate b are welded, the groove wall of the water flow groove a1 and the bottom plate b enclose the cooling water flow channel of the water-cooled plate. In order to ensure the sealing of the cooling water flow channel, when the cover plate a and the bottom plate b are welded, it is not only necessary to weld along the edge line of the cover plate a and the bottom plate b, but also necessary to weld along the edge line of the notch of the water flow groove a1 between the cover plate a and the bottom plate b. The welding method mostly adopts the brazing recorded in the text of the Chinese patent publication number CN212144892U entitled A battery water-cooling plate brazing tool for new energy vehicles. However, due to the brazing method, there are disadvantages of high energy consumption and environmental pollution. Therefore, the use of stir friction welding to manufacture thin-walled water-cooled plates has become a new technical path. However, in actual implementation, the thin-walled water-cooled plates have problems such as easy warping and curling, and large deformation after welding during the stir friction welding process, which urgently need to be solved. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a welding tool for stir friction welding of thin-walled parts, which can effectively improve the flatness of the thin-walled parts after stir friction welding.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A welding tool for stir friction welding of thin-walled parts includes a tool base for fixing a bottom plate and a cover plate, a heating and cooling assembly is arranged on the top of the tool base, the bottom plate and the cover plate are sequentially positioned, stacked and fixed on top of the heating and cooling assembly, and the heating and cooling assembly includes a heating module for heating the bottom plate and a water-cooling channel for cooling the weld between the bottom plate and the cover plate.

[0007] As a further solution of the utility model: the water-cooling flow channel includes an S-shaped first flow channel. In a top-down perspective perpendicular to the top plate surface of the tooling base, the direction of the first flow channel overlaps with the direction of the cooling water flow channel formed by the bottom plate and the cover plate, and a heating module is provided at each recessed part of the first flow channel.

[0008] As a further solution of the present invention: the heating module is a heating plate.

[0009] As a further solution of the present invention: the water-cooling flow channel also includes a second flow channel distributed at the edge of the cover plate.

[0010] As a further solution of the utility model: the top of the tooling base is provided with an inner groove for installing the heating and cooling assembly, and the top surface of the heating and cooling assembly is flush with the top surface of the tooling base.

[0011] As a further solution of the utility model: a positioning column for positioning the bottom plate and the cover plate is fixedly connected to the top of the tooling base.

[0012] As a further solution of the utility model: the tooling base is provided with a locking block for pressing and fixing the bottom plate and the cover plate on the tooling base along the vertical direction.

[0013] As a further solution of the utility model: the bottom of the locking block is distributed in two stages, and the locking block is locked and fixed to the tooling base by bolts. When the locking block is locked, the high step surface of the locking block abuts against the top of the cover plate, and the low step surface of the locking block abuts against the tooling base.

[0014] As a further solution of the utility model: the locking blocks are arranged in several groups distributed on the three sides of the bottom plate and the cover plate, a long hole is arranged on the top of the locking blocks, the length direction of the long hole is perpendicular to the side of the bottom plate at the corresponding position, the bolt passes through the long hole and is locked with the screw hole on the tooling base.

[0015] As a further solution of the utility model: it also includes a control component for controlling the start and stop of the heating and cooling components, and the control component is a water cooler and a heating controller.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. Before welding, the base plate is heated by the heating module. After that, the welding operation is performed on the welding point through the stirring welding head assembly. During the welding process, the weld position is evenly cooled through the water cooling channel. The prefabricated temperature difference stretching principle is used to ensure the flatness of the base plate during welding, thereby improving the processing quality. In addition, since the post-welding deformation of this welding is smaller, the post-welding correction process can be eliminated, which improves the process efficiency and reduces the process cost.

[0018] 2. The direction of the first flow channel overlaps with the direction of the cooling water flow channel formed by the bottom plate and the cover plate, so as to achieve good cooling of the inner weld during the welding process. In addition, each concave part of the first flow channel is provided with a heating module to ensure the uniformity of heating the bottom plate, so that the temperature difference between the weld and the two sides of the weld is uniform, so that the flatness of the bottom plate is better in the welding operation using the prefabricated temperature difference stretching principle.

[0019] 3. The heating module is a heating plate, which has good heating effect and large heating area, and can better fit with the bottom of the base plate, further ensuring the heating effect and uniformity of the base plate.

[0020] 4. The water-cooling channel also includes a second channel distributed at the edge of the cover plate, which not only realizes good cooling of the peripheral weld of the cooling water channel formed by the base plate and the cover plate, but also realizes good cooling effect on the weld during the welding process between the edge of the cover plate and the base plate.

[0021] 5. An inner groove for installing the heating and cooling components is provided on the top of the tooling base. The top surface of the heating and cooling components is flush with the top surface of the tooling base, ensuring the flatness of the top surface of the tooling base to achieve uniform support for the bottom of the base plate.

[0022] 6. To ensure that the water-cooling channel can be accurately aligned with the weld, a positioning column for positioning the bottom plate and the cover plate is fixedly connected to the top of the tooling base to locate the installation position of the bottom plate and the cover plate on the tooling base.

[0023] 7. The bottom plate and the cover plate are pressed and fixed on the tooling base along the vertical direction by the locking pressure block, thereby achieving stable fixation between the bottom plate and the cover plate.

[0024] 8. The bottom of the locking block is distributed in two steps. When the locking block is locked, the high step surface and the low step surface of the locking block are stably supported, which effectively prevents the locking block from shaking in the locked state and causing the locking looseness.

[0025] 9. A long hole is set on the top of the locking block, so that the locking block can slide along the length direction of the hole. By sliding the locking block to separate from or abut against the cover plate, the fixation between the cover plate and the bottom plate can be quickly released or achieved.

[0026] 10. The welding tool also includes a control module for controlling the start and stop of the heating and cooling components. The control module is a water cooler and a heating controller. The water cooler is used to cool the cooling water in the water cooling channel and drive the cooling water to circulate in the water cooling channel. The heating controller is used to control the heating temperature of the heating module. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] Figure 2 It is a schematic diagram of the top structure of the utility model.

[0029] Figure 3 for Figure 2 Schematic diagram of the structure with a partial enlargement at A.

[0030] Figure 4 It is a structural schematic diagram of the locking pressing block in the utility model.

[0031] Figure 5 It is a structural schematic diagram of the utility model in use state.

[0032] In the figure: 10, tooling base; 11, positioning column; 12, screw hole; 20, heating module; 30, water cooling channel; 31, first channel; 32, second channel; 40, locking block; 41, long hole; 50, control module; c, stirring welding head assembly; a, cover plate; a1, water flow trough; b, bottom plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] For ease of understanding, the specific structure and working mode of the utility model are further described below in conjunction with the accompanying drawings:

[0035] The specific structure of the utility model refers to Figure 1-5 As shown, its main structure includes a tooling base 10 for fixing the bottom plate b and the cover plate a and a heating and cooling assembly arranged on the top of the tooling base 10. Among them, the tooling base 10 is located directly below the stirring welding head assembly c, and the heating and cooling assembly includes a heating module 20 for heating the bottom plate b and a water-cooling channel 30 for cooling the weld between the bottom plate b and the cover plate a. When in use, the bottom plate b and the cover plate a are positioned and stacked in sequence and fixed directly above the heating and cooling assembly. The bottom plate b is first heated by the heating module 20. Thereafter, the welding position is welded by the stirring welding head assembly c. During the welding process, the weld position is evenly cooled by the water-cooling channel 30, and the prefabricated temperature difference stretching principle is used to ensure the flatness of the bottom plate b during welding, thereby improving the processing quality. In addition, since the post-welding deformation of this welding is smaller, the post-welding correction process can be eliminated, which improves the process efficiency and reduces the process cost.

[0036] like Figure 1 As shown, the water cooling channel 30 includes a first channel 31 distributed in an S-shaped manner. Specifically, as shown in FIG. Figure 1 and Figure 5 As shown, in a top view perpendicular to the top surface of the tooling base 10, the direction of the first flow channel 31 overlaps with the direction of the cooling water flow channel formed by the bottom plate b and the cover plate a, so as to achieve good cooling of the inner weld during the welding process. Figure 2As shown, each concave part of the first flow channel 31 is provided with a heating module 20, which ensures the uniformity of heating of the bottom plate b and makes the temperature difference between the weld and the two sides of the weld uniform, so that the flatness of the bottom plate b is better during the welding operation using the prefabricated temperature difference stretching principle.

[0037] In addition, if Figure 2 As shown, the heating module 20 is a heating plate, which has a good heating effect and a large heating area, and can better fit with the bottom of the bottom plate b, further ensuring the heating effect and uniformity of the bottom plate b.

[0038] Further, such as Figure 2 As shown, the water-cooling channel 30 also includes a second channel 32 distributed at the edge of the cover plate a, which not only achieves good cooling of the peripheral weld of the cooling water channel formed by the base plate b and the cover plate a, but also achieves good cooling effect on the weld during the welding process between the edge of the cover plate a and the base plate b.

[0039] On the basis of the above, if Figure 1 As shown, the top of the tooling base 10 is provided with an inner groove for installing the heating and cooling assembly, and the top surface of the heating and cooling assembly is flush with the top surface of the tooling base 10, ensuring the flatness of the top surface of the tooling base 10 to achieve uniform support for the bottom of the base plate b.

[0040] In addition, if Figure 1 As shown, to ensure that the water-cooling channel 30 can be accurately aligned with the weld, a positioning column 11 for positioning the bottom plate b and the cover plate a is fixedly connected to the top of the tooling base 10 to locate the installation position of the bottom plate b and the cover plate a on the tooling base 10.

[0041] On the basis of the above, if Figure 1-5 As shown, a locking block 40 is provided on the tooling base 10, and the locking block 40 presses and fixes the bottom plate b and the cover plate a on the tooling base 10 along the vertical direction, thereby achieving stable fixation between the bottom plate b and the cover plate a.

[0042] Specifically, Figure 4 As shown, the bottom of the locking block 40 is distributed in two-stage steps, and the locking block 40 is locked and fixed with the tooling base 10 by bolts. When the locking block 40 is locked, the high step surface of the locking block 40 abuts against the top of the cover plate a, and the low step surface of the locking block 40 abuts against the tooling base 10, so that the high step surface and the low step surface of the locking block 40 in the locked state are stably supported, effectively preventing the locking block 40 from shaking in the locked state and causing the locking loosening problem.

[0043] Further, such as Figure 3 and Figure 4As shown, a long hole 41 is provided on the top of the locking block 40, and the length direction of the hole 41 is perpendicular to the side of the corresponding bottom plate b. The bolt passes through the long hole 41 and is locked with the screw hole 12 on the tooling base 10. The long hole 41 is provided so that the locking block 40 can slide along the length direction of the hole 41. By sliding the locking block 40 to separate from or abut against the cover plate a, the fixation between the cover plate a and the bottom plate b can be quickly released or realized. In addition, as Figure 2 As shown, the locking pressure blocks 40 are arranged as several groups distributed on three sides of the base plate b and the cover plate a, and one side is reserved for the working condition where the base plate b is longer. In addition, the arrangement of several groups of locking pressure blocks 40 can ensure uniform compression of the sides of the base plate b and the cover plate a.

[0044] On the basis of the above, if Figure 1 As shown, the welding tool also includes a control module 50 for controlling the start and stop of the heating and cooling components. The control module 50 is a water cooler and a heating controller. The water cooler is used to cool the cooling water in the water cooling channel 30 and drive the cooling water to circulate in the water cooling channel 30. The heating controller is used to control the heating temperature of the heating module 20.

[0045] Of course, for those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0047] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A welding tool for friction stir welding of thin-walled parts, characterized in that: The invention comprises a tooling base (10) for fixing a bottom plate (b) and a cover plate (a), a heating and cooling assembly being arranged on the top of the tooling base (10), the bottom plate (b) and the cover plate (a) being positioned, stacked and fixed in sequence on top of the heating and cooling assembly, and the heating and cooling assembly comprising a heating module (20) for heating the bottom plate (b) and a water cooling channel (30) for cooling a weld between the bottom plate (b) and the cover plate (a).

2. A welding tool for friction stir welding of thin-walled parts according to claim 1, characterized in that: The water-cooling channel (30) comprises a first channel (31) distributed in an S-shape. In a top-down view perpendicular to the top surface of the tooling base (10), the direction of the first channel (31) overlaps with the direction of the cooling water channel formed by the bottom plate (b) and the cover plate (a), and each inner recess of the first channel (31) is provided with a heating module (20).

3. A welding tool for friction stir welding of thin-walled parts according to claim 2, characterized in that: The heating module (20) is a heating plate.

4. A welding tool for friction stir welding of thin-walled parts according to claim 2, characterized in that: The water-cooling flow channel (30) also includes a second flow channel (32) distributed at the edge of the cover plate (a).

5. A welding tool for friction stir welding of thin-walled parts according to any one of claims 1 to 4, characterized in that: An inner groove for mounting a heating and cooling assembly is provided on the top of the tooling base (10), and the top surface of the heating and cooling assembly is flush with the top surface of the tooling base (10).

6. A welding tool for friction stir welding of thin-walled parts according to any one of claims 1 to 4, characterized in that: A positioning column (11) for positioning the bottom plate (b) and the cover plate (a) is fixedly connected to the top of the tooling base (10).

7. A welding tool for friction stir welding of thin-walled parts according to any one of claims 1 to 4, characterized in that: The tooling base (10) is provided with a locking pressing block (40) for pressing and fixing the bottom plate (b) and the cover plate (a) on the tooling base (10) in a vertical direction.

8. The welding tool for friction stir welding of thin-walled parts according to claim 7, characterized in that: The bottom of the locking block (40) is distributed in two-stage steps. The locking block (40) is locked and fixed to the tooling base (10) by bolts. When the locking block (40) is locked, the high step surface of the locking block (40) abuts against the top of the cover plate (a), and the low step surface of the locking block (40) abuts against the tooling base (10).

9. A welding tool for friction stir welding of thin-walled parts according to claim 8, characterized in that: The locking blocks (40) are arranged as a plurality of groups distributed on three sides of the bottom plate (b) and the cover plate (a); a long hole (41) is arranged on the top of the locking blocks (40); the hole length direction of the long hole (41) is perpendicular to the side of the bottom plate (b) at the corresponding position; the bolts pass through the long holes (41) and are locked with the screw holes (12) on the tooling base (10).

10. A welding tool for friction stir welding of thin-walled parts according to any one of claims 1 to 4, characterized in that: It also includes a control component (50) for controlling the start and stop of the heating and cooling components. The control component (50) is a water cooler and a heating controller.

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