Friction stir welding tool for narrow-edge structure phase change thermal control component
By designing friction stir welding equipment for phase change heat control components of narrow-edge structures, using quick-change welding tools and tail holes to eliminate tooling, the problems of low accuracy, high process difficulty, insufficient welding strength, high welding temperature and "keyhole" defects in the welding process of narrow-edge structures are solved, and efficient and economical welding effects are achieved.
Patent Information
- Application Number
- CN202421956534.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-13
AI Technical Summary
During the welding process, the phase change thermal control components of narrow-edge structures have problems such as low accuracy, high process difficulty, insufficient welding strength, high welding temperature and "keyhole" defects, making it difficult to achieve permanent sealing and high-quality welding.
A friction stir welding tool including a phase change thermal control component of a narrow-edge structure including a quick-change welding tool and a tail hole elimination tool is designed. Quick positioning and tail hole elimination are achieved through positioning blocks and lead-out blocks to ensure the stability and quality of welding.
It improves welding accuracy and strength, realizes permanent sealing, eliminates "keyhole" defects, simplifies the process flow, reduces costs, and is suitable for narrow-edge thermal control components of different thicknesses.
Smart Images
Figure CN222971220U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of welding processes, and particularly relates to a friction stir welding tooling for a narrow-edge structure phase change heat control component. Background Technique
[0002] For the narrow-edge structure phase change heat control component, its minimum thickness is only about 12 mm. When the plug 1 is welded and sealed, the minimum margin from the weld position to the edge is only 1 - 2 mm. After welding, the deformation of the two major surfaces is required to be within 0.05 mm, and the weld quality reaches Grade I. Since the narrow-edge structure is prone to deformation during the welding process, it is very challenging to control the deformation amount within 0.05 mm. Moreover, the margin from the weld position to the edge is very small, and extremely high precision and control ability are required during welding to avoid welding defects or structural damage caused by the weld being too close to the edge, so the welding process is difficult.
[0003] The potting rate of the traditional phase change heat control component filled with phase change material inside is 80%. It has less filled phase change material and relatively small heat absorption capacity, and the screw sealing method can meet the sealing requirements. In contrast, the potting rate of the narrow-edge structure phase change heat control component can reach over 95%. This not only increases the total volume of the material but also increases the pressure of the material in the packaging container. Especially when the volume of the material changes during the phase change process, there is a greater possibility of seal failure, and a more reliable solid-phase connection method is required for sealing.
[0004] The temperature of the phase change material filled inside the phase change heat control component should not exceed 140 °C, otherwise irreversible volatilization and denaturation will occur. However, the welding temperatures of fusion welding, brazing or flux brazing are all relatively high and cannot be used. A reliable solid-phase connection method with a lower temperature is required for sealing.
[0005] As a new type of solid-phase welding method, friction stir welding has a welding temperature much lower than 140 °C and is suitable for welding and sealing of phase change heat control components. In addition, it has high welding strength and good weld quality, and is a more reliable permanent sealing method.
[0006] However, there are still some deficiencies. For example, friction stir welding is usually used for welding large products, which are easy to fix and facilitate welding. However, when welding narrow-edge structures, due to the small thickness of the products, they are not easy to fix and the welding is difficult. At the same time, the smaller the product, the higher the relative precision requirements. For the thermal control component with a narrow-edge structure with a thickness of only 12 mm, it is more difficult to control during the sealing welding process. Because the force applied during the welding process is large, the component is more likely to deform and is more difficult to fix. In addition, the tail holes left after welding must also be eliminated (large products do not need to). The narrow-edge structure will also cause problems such as insufficient flow of thermoplastic metal around the weld seam, resulting in surface grooves, flash burrs, back weld beads, tunnel defects, etc., reducing the welding precision; when welding, the workpiece needs to be rigidly fixed on the backing pad to ensure the stability and quality of welding, which will limit the adjustment ability of the workpiece during the welding process and there is a risk of workpiece deformation. Summary of the Invention
[0007] In view of the above analysis, the present invention aims to provide a friction stir welding tooling for a narrow-edge structure phase change thermal control component, so as to solve at least one of the technical problems existing in the prior art: 1) The welding precision of the existing narrow-edge structure phase change thermal control component is low and the process difficulty is high; 2) The welding strength is insufficient and the permanent sealing cannot be achieved; 3) The welding temperature is high and the temperature requirement for filling the phase change material inside the component cannot be reached; 4) The existing friction stir welding will produce "keyhole" defects during the welding process, which need subsequent treatment. When welding, the component needs to be rigidly fixed on the backing pad to ensure the stability and quality of welding. When welding a narrow-edge structure, problems such as insufficient flow of thermoplastic metal around the weld seam will cause surface grooves, flash burrs, back weld beads, tunnel defects, etc.
[0008] The object of the present invention is mainly achieved by the following technical solutions:
[0009] A friction stir welding tooling for a narrow-edge structure phase change thermal control component, comprising a quick-change welding tooling for fixing and a tail hole elimination tooling for eliminating tail holes;
[0010] The quick-change welding tooling includes a bottom plate, a back plate, a first backing plate, a second backing plate, a fastening tooling and a positioning block; the tail hole elimination tooling is a lead-out block;
[0011] The bottom plate is used to connect with the workbench, the back plate is used to provide a fixed abutting surface for the narrow-edge structure phase change thermal control component, the positioning block is used to position the placement position of the narrow-edge structure phase change thermal control component, and the first backing plate, the second backing plate and the fastening tooling are used for clamping and fixing the narrow-edge structure phase change thermal control component.
[0012] Further, the bottom plate is fixedly connected to the workbench; the back plate is vertically and fixedly connected to the bottom plate; the positioning block is vertically and fixedly connected to the back plate; the first cushion plate and the second cushion plate are both movable plates; the lead-out block is a movable crimping part independent of the first cushion plate and the second cushion plate.
[0013] Further, there are ≥4 fastening jigs, and each fastening jig consists of 1 supporting part and 1 pressing part; the supporting part is vertically and fixedly connected to the back plate; the pressing part is vertically sleeved on the supporting part.
[0014] Further, the first cushion plate has the same maximum outer shape as that of the narrow-side structure phase change heat control component, and is a rectangular thin plate.
[0015] Further, the length of the second cushion plate is the same as that of the first cushion plate, and the height is lower than that of the first cushion plate.
[0016] Further, the positioning block is rectangular or square.
[0017] Further, the length of the lead-out block is the same as that of the second cushion plate.
[0018] Further, the material of the lead-out block is the same as that of the narrow-side structure phase change heat control component.
[0019] Further, the supporting part is a cylindrical screw rod, and the pressing part is threadedly connected to the supporting part.
[0020] Further, the first cushion plate, the narrow-side structure phase change heat control component, and the second cushion plate are sequentially placed on the bottom plate in the direction away from the back plate. The welding surface of the narrow-side structure phase change heat control component is placed on the upper part. The first cushion plate is next to the back plate. The narrow-side structure phase change heat control component is placed between the first cushion plate and the second cushion plate. The second cushion plate is located outside the phase change heat control component. The lead-out block is placed on the second cushion plate. The pressing parts of 2 fastening jigs are located outside the lead-out block, and the pressing parts of other fastening jigs are located outside the second cushion plate.
[0021] Compared with the prior art, the present utility model can at least achieve one of the following beneficial effects:
[0022] 1) For the friction stir welding tooling for the narrow-side structure phase change heat control component provided by the present utility model, when welding with the aid of this tooling, the operation is simple, the efficiency is high, and the cost is low. The present utility model designs a welding tooling, which is provided with a positioning block and a lead-out block. The positioning block can realize the functions of quick positioning and quick replacement, simplify the process and improve the efficiency; the lead-out block has a simple structure and is convenient to use, can be reused, saves costs; the lead-out block has a small volume, can be quickly replaced, reduces material waste, and improves the efficiency; through the lead-out block, the tail hole can be led out to eliminate the "keyhole" defect, and no post-treatment is required, which simplifies the process.
[0023] 2) The utility model provides a stir friction welding fixture for a narrow-edge structure phase change thermal control component. When welding is performed with the aid of the fixture, the welding precision is high and the weld quality is good. Phase change thermal control components are usually thin-walled cavity structures, and the flatness requirements of the mounting surface with electronic components are extremely high, which makes precision control during welding very difficult. Although traditional welding methods such as laser welding and electron beam welding have high strength, they have large deformation during thin plate welding, and the flatness tolerance is ≥0.5mm, which cannot meet the use requirements. The "sandwich" type quick-change welding fixture of the utility model can press the welded product during welding, control product deformation, and ensure the stability and quality of welding. The designed lead-out tail hole eliminates the fixture lead-out block, avoiding surface grooves, flash burrs, back weld nodules, tunnel defects and other problems caused by insufficient flow of thermoplastic metal around the weld due to the narrow edge structure when welding narrow edge structures, thereby improving welding precision.
[0024] 3) The friction stir welding tool for a narrow-edge structure phase change thermal control component provided by the utility model provides a more reliable way to seal the narrow-edge structure phase change thermal control component. The filling rate of the phase change material filled inside the traditional phase change thermal control component is 80%, and the sealing requirement can be met by the method of screw sealing. The filling rate of the narrow-edge structure phase change thermal control component can reach more than 95%. The high filling rate means that more phase change material is filled in a limited space, which not only increases the total volume of the material, but also increases the pressure of the material in the packaging container, especially when the volume of the material changes during the phase change process, it is more likely to cause the possibility of sealing failure. The friction stir welding tool for a narrow-edge structure phase change thermal control component provided by the utility model has high welding accuracy and good weld quality when welding with the help of the tool, which can achieve permanent sealing of the narrow-edge structure phase change thermal control component, and provides a more reliable way to seal the narrow-edge structure phase change thermal control component.
[0025] 4) The utility model provides a friction stir welding tool for a narrow-edge structure phase change thermal control component. When welding is performed with the help of the tool, the "keyhole" defect generated during welding is eliminated. The welding tool of the utility model is provided with a lead-out block according to the product structure, and the tail hole can be guided out through the lead-out block to eliminate the "keyhole" defect on the thermal control component.
[0026] 5) The friction stir welding tooling for a narrow-edge structure phase-change thermal control component provided by the utility model can meet the welding requirements of various narrow-edge structure phase-change thermal control components. Most narrow-edge structure thermal control components are rectangular, and the only difference is the size. The clamping tooling of the utility model does not need to rigidly fix the component on the backing pad during welding, which can solve the welding problem of thermal control components of different thicknesses. When the shape is different, it is only necessary to replace the pad to make it consistent with the size of the narrow-edge thermal control component, which can solve the manufacturing requirements of various narrow-edge structure phase-change thermal control components.
[0027] 6) It solves the problem that the traditional welding process has a high welding temperature and cannot meet the temperature requirement of the phase change material filled inside the component. The temperature of the phase change material filled inside the phase change thermal control component shall not exceed 140 °C, otherwise irreversible volatilization and denaturation will occur. However, the welding temperatures of traditional welding processes such as fusion welding, brazing, and flux brazing are all relatively high and cannot be used. The friction stir welding tooling of the present utility model can be used for friction stir welding sealing, and its welding temperature is much lower than 140 °C, which is suitable for welding narrow-edge structure phase change thermal control components. It has high welding strength and good weld quality, and can achieve permanent connection.
[0028] In the present utility model, the above technical solutions can also be combined with each other to achieve more preferred combination schemes. Other features and advantages of the present utility model will be described in the following content. Moreover, some advantages can be made obvious from the description or can be understood by implementing the present utility model. The purpose and other advantages of the present utility model can be achieved and obtained through the content specifically pointed out in the text and the drawings. Description of the Drawings
[0029] The drawings are only for the purpose of showing specific embodiments and are not considered as a limitation to the present utility model. Throughout the drawings, the same reference signs denote the same components.
[0030] Figure 1 It is a schematic structural diagram after installing and welding a plug and a lead-out block for a narrow-edge structure phase change thermal control component;
[0031] Figure 2 It is a schematic diagram of the friction stir welding tooling for a narrow-edge structure phase change thermal control component.
[0032] Reference Signs:
[0033] 1 - Plug; 2 - Narrow-edge structure phase change thermal control component; 3 - Back plate; 4 - Positioning block; 5 - First backing plate; 6 - Second backing plate; 7 - Fastening tooling; 8 - Bottom plate; 9 - Lead-out block. Detailed Embodiments
[0034] The following will specifically describe the preferred embodiments of the present utility model in conjunction with the drawings. Among them, the drawings form a part of this application and are used together with the embodiments of the present utility model to explain the principle of the present utility model, rather than to limit the scope of the present utility model.
[0035] In view of the defects of the existing narrow-edge structure phase change thermal control components during welding and sealing, the present utility model improves the welding tooling and designs a new friction stir welding tooling for narrow-edge structure phase change thermal control components. This tooling can ensure the fixing effect through a quick-change welding tooling; eliminate the tail hole through a lead-out block and the lead-out block can be reused; and quickly position through the positioning block 4.
[0036] The utility model discloses a friction stir welding tooling for a narrow-edge structure phase change heat control component, and its schematic diagram is as follows Figure 2 shown, including a quick-change welding tooling for fixing and a tail hole elimination tooling for eliminating tail holes. The installation position of the plug 1 is also marked in the figure. During welding, the plug is installed at this position for welding to achieve the purpose of sealing.
[0037] It should be noted that since friction stir welding has high requirements for tooling, it is necessary to ensure that the workpiece does not move and reduce large-surface deformation during the welding process. According to the product structure, a quick-change welding tooling with a "sandwich" structure is manufactured, including a bottom plate 8, a back plate 3, a first cushion plate 5, a second cushion plate 6, a fastening tooling 7, and a positioning block 4, to ensure workpiece compaction and quick change.
[0038] Since the tail hole is an inherent defect of the friction stir welding method, which is a hole left by the withdrawal of the stirring pin, usually a conical hole with a maximum diameter of 6-12 mm and a maximum depth of 2-3 mm. The tail hole will affect the weld quality and surface quality. The minimum thickness of the narrow-edge structure phase change heat control component is only less than 12 mm, and it is difficult to eliminate the tail hole. For this special structure, a lead-out type tail hole elimination tooling, called a lead-out block, is designed.
[0039] Furthermore, the quick-change welding tooling includes a bottom plate 8, a back plate 3, a first cushion plate 5, a second cushion plate 6, a fastening tooling 7, and a positioning block 4; the tail hole elimination tooling is a lead-out block.
[0040] The bottom plate 8 is used to connect with the workbench, the back plate 3 is used to provide a fixed abutting surface for the narrow-edge structure phase change heat control component 2, the positioning block 4 is used for positioning the placement position of the narrow-edge structure phase change heat control component, and the first cushion plate, the second cushion plate, and the fastening tooling are used for clamping and fixing the narrow-edge structure phase change heat control component.
[0041] Further, the bottom plate 8 is fixedly connected to the workbench; the back plate 3 is vertically and fixedly connected to the bottom plate 8; the positioning block is vertically and fixedly connected to the back plate; the number of the fastening toolings 7 is not less than 4, and each fastening tooling 7 is composed of 1 support part and 1 pressing part. The support part is vertically and fixedly connected to the back plate 3 and is located on the side where the narrow-edge structure phase change heat control component is placed; the pressing part is vertically sleeved on the support part; the first cushion plate 5 and the second cushion plate 6 are both movable plates, and they are used together with the fastening tooling 7 for clamping and fixing the narrow-edge structure phase change heat control component.
[0042] In a specific implementation manner, the lead-out block 9 is a movable crimping part independent of the first cushion plate 5 and the second cushion plate 6. Its shape is a cuboid, the material is the same as that of the narrow-edge structure phase change heat control component 2, the length is the same as the length of the cushion plate, and the width and height are both 20 mm. During welding, the lead-out block is placed on the second cushion plate 6 and then pressed onto the narrow-edge structure phase change heat control component through the fastening tooling 7.
[0043] During welding, the tail hole can be led out through the lead-out block to eliminate the "keyhole" defect on the thermal control component; the lead-out block increases the welding width, avoiding problems such as surface grooves, flash burrs, back weld beads, and tunnel defects caused by insufficient flow of thermoplastic metal around the weld due to the narrow-edge structure when welding the narrow-edge structure, improving the welding precision; on the other hand, it plays a role in ensuring the stability of the thermal control component during the welding process without shaking. After welding, the lead-out block can be cut off and reused, reducing costs.
[0044] Furthermore, the narrow-edge structure phase change thermal control component 2 is clamped between the first backing plate 5 and the second backing plate 6. The first backing plate 5 is close to the side of the back plate 3. In order to provide a reliable clamping effect, the design principle of the first backing plate 5 is that its outer shape is consistent with the maximum outer shape of the thermal control component.
[0045] In a specific embodiment, the bottom plate 8 is fixed to the horizontal tabletop at the bottom of the tooling by means of bolt connection or welding. It is in the shape of a rectangular parallelepiped plate with a thickness of 5 - 150 mm. Its function is to provide stable support during the welding process, ensuring that the welding workpiece remains stable during welding, reducing vibration and deviation.
[0046] In a specific embodiment, the back plate 3 is vertically fixed on the upper surface of the bottom plate 8 through a clamping device or welding, on the side of the welding area, that is, on the side of the welding surface of the workpiece. It is in the shape of a rectangular parallelepiped plate with a thickness of 5 - 150 mm. It is used to provide side support during welding to help stabilize the workpiece and prevent bending or twisting during welding. During welding, due to thermal expansion and cooling shrinkage in the heat-affected area, the workpiece may deform, and the back plate 3 can limit this deformation and maintain the geometric accuracy of the welding area.
[0047] During welding, the first backing plate 5, the narrow-edge structure phase change thermal control component 2, and the second backing plate 6 are sequentially placed on the bottom plate 8 in the direction away from the back plate 3. At this time, the first backing plate 5, the narrow-edge structure phase change thermal control component 2, and the second backing plate 6 are all on the same side of the positioning block 4 compared to the back plate 3. The welding surface of the narrow-edge structure phase change thermal control component 2 is placed on the upper part for easy welding. The first backing plate 5 is next to the back plate 3. The narrow-edge structure phase change thermal control component 2 is placed between the first backing plate 5 and the second backing plate 6, and the second backing plate 6 is located outside the narrow-edge structure phase change thermal control component 2.
[0048] The outer shape of the first backing plate 5 is consistent with the maximum outer shape of the narrow-edge structure phase change thermal control component. It is a rectangular parallelepiped thin plate with a thickness of 10 mm - 20 mm. The first backing plate 5 provides additional support and positioning for the welding area during welding, ensuring the stability of the welding process; it can also act as a medium for heat transfer to help control the temperature of the welding area and prevent local overheating or uneven cooling.
[0049] Furthermore, during welding, the lead-out block 9 is placed on the second backing plate 6, and then the lead-out block is pressed onto the narrow-side structure phase change heat control component 2 by the fastening tooling 7. Therefore, the design principle of the second backing plate 6 is that its height should be 20 mm lower than that of the heat control component.
[0050] The second backing plate 6 is in the shape of a rectangular thin plate. Its length is the same as that of the first backing plate 5, its thickness is 10 mm to 20 mm, and its height should be 20 mm lower than that of the phase change heat control component, leaving space for placing the lead-out block 9. During the welding process, it can serve as a heat conduction medium to help disperse the heat generated during welding, prevent heat from accumulating outside the workpiece, and reduce the width of the heat affected zone; it can protect the outer surface of the workpiece, prevent spatter and slag during welding from damaging the workpiece surface; and it can provide additional support for the welding area, helping to maintain the stability of the workpiece and reduce deformation during welding.
[0051] The positioning block 4 is vertically fixed at the upper edge position of the back plate 3. Its shape is rectangular or square, which is simple and clear, easy to identify and operate. It can be used for zero-point positioning to quickly find the zero point, eliminating the manual zero-finding link, achieving quick positioning and quick change function, and simplifying the process to improve efficiency. During welding, the zero point can be set at the intersection formed by the positioning block 4, the back plate 3, and the narrow-side structure heat control component. Use the positioning block 4 for quick zero-point positioning. Next to the positioning block 4, the first backing plate 5, the narrow-side structure phase change heat control component 2, and the second backing plate 6 are sequentially placed on the bottom plate 8 in the direction away from the back plate 3 for loading. Finally, the lead-out block 9 is movably placed on the second backing plate 6 next to the positioning block 4 for loading the lead-out block 9.
[0052] There are 4 or more fastening toolings 7. Each fastening tooling 7 consists of 1 support part and 1 pressing part. The support part is a cylindrical screw, and the pressing part is in the shape of a rectangular parallelepiped-like sheet frame. The pressing part is vertically sleeved on the support part. During welding, a nut is placed outside the pressing part, and the pressing part is pressed by the cooperation of the nut and the screw, so as to press the component. The support part is vertically fixed at the edge position of the back plate 3 through a nut. Two pressing parts are located on the lead-out block 9, and several other pressing parts are located on the second backing plate 6. Turn the nut to press. During welding, the narrow-side structure phase change heat control component 2 can be fastened in the tooling to prevent it from moving during welding. It can control product deformation, ensure the stability and quality of welding, and improve welding strength and weld quality.
[0053] In a possible implementation, to ensure that the narrow-side structure phase change thermal control component 2 does not move and to reduce large-surface deformation during the welding process, a quick-change welding tooling was manufactured according to the product structure design. It consists of a bottom plate 8, a back plate 3, a first backing plate 5, a second backing plate 6, a fastening tooling 7, and a positioning block 4. The size of the first backing plate 5 is 20 mm × 280 mm × 180 mm, the size of the second backing plate 6 is 20 mm × 280 mm × 160 mm, and the size of the positioning block 4 is 40 mm × 40 mm × 40 mm. To eliminate the holes left by the withdrawal of the friction stir welding pin, a lead-out type tail hole elimination tooling, called a lead-out block 9, was designed. Its material is the same as that of the narrow-side structure phase change thermal control component 2, both being 6063T6 state aluminum alloy. Its edges are free of burrs, its surface is free of oil stains, and its size specification is 20 mm × 20 mm × 280 mm.
[0054] Next, a friction stir welding tooling for a narrow-side structure phase change thermal control component of the present utility model will be further described through specific embodiments.
[0055] Embodiment 1
[0056] This embodiment provides a friction stir welding tooling for a narrow-side structure phase change thermal control component, which consists of a quick-change welding tooling and a tail hole elimination tooling. The quick-change welding tooling consists of a bottom plate 8, a back plate 3, a first backing plate 5, a second backing plate 6, a fastening tooling 7, a positioning block 4, and a lead-out block 9. The tail hole elimination tooling is the lead-out block 9.
[0057] The bottom plate 8 is located below the welding area, and the back plate 3 is located on the side of the welding area and is fixed on the bottom plate 8 through a clamping device. During welding, the first backing plate 5, the phase change thermal control component 2, and the second backing plate 6 are all placed on the bottom plate 8. The first backing plate 5 is next to the back plate 3, the phase change thermal control component 2 is placed between the first backing plate 5 and the second backing plate 6, and the second backing plate 6 is located outside the phase change thermal control component 2.
[0058] The outer shape of the first backing plate 5 is the same as the maximum outer shape of the phase change thermal control component 2. It is a rectangular thin plate with a size of 20 mm × 280 mm × 180 mm. The outer shape of the second backing plate 6 is a rectangular thin plate with a size of 20 mm × 280 mm × 160 mm, and its height is 20 mm lower than that of the phase change thermal control component to leave space for placing the lead-out block 9. The lengths of the sides of the first backing plate 5 and the second backing plate 6 that are flush with the bottom plate 8 are the same.
[0059] The positioning block 4 is vertically fixed on the back plate 3, located at the edge of the welded workpiece, i.e., the narrow-side structure phase change heat control member 2, with a rectangular or square shape and dimensions of 40mm×40mm×40mm; the lead-out block 9 has a cuboid shape, the same material as the narrow-side structure phase change heat control member 2, and dimensions of 20mm×20mm×280mm. The lead-out block 9 is placed on the second backing plate 6 and pressed onto the narrow-side structure phase change heat control member 2 through the fastening tooling 7.
[0060] There are at least 4 fastening toolings 7, and each fastening tooling consists of 1 support part and 1 pressing part; the support part is vertically fixed on the edge of the back plate 3 by a nut, in the shape of a cylindrical screw; the pressing part is vertically sleeved on the support part, in the shape of a rectangular parallelepiped sheet-like frame, with a nut on its outer side, and the pressing part is pressed by the cooperation of the nut and the screw.
[0061] During welding, the first backing plate 5, the phase change heat control member 2, and the second backing plate 6 are sequentially placed on the bottom plate 8 in the direction away from the back plate 3. The welding surface of the phase change heat control member 2 is placed on the upper part for easy welding. The first backing plate 5 is next to the back plate 3. The phase change heat control member 2 is placed between the first backing plate 5 and the second backing plate 6. The second backing plate 6 is located outside the phase change heat control member 2. The lead-out block 9 is placed on the second backing plate 6. The pressing parts of 2 fastening toolings are located outside the lead-out block 9, and the other several are located outside the second backing plate 6. By turning the nuts on the outer sides of the pressing parts, the narrow-side structure phase change heat control member 2 is fastened in the tooling to prevent movement during the welding process. The deformation of the product can be controlled, the stability and quality of welding can be ensured, and the welding strength and weld quality can be improved.
[0062] Embodiment 2
[0063] This embodiment provides a friction stir welding tooling for a narrow-side structure phase change heat control member 2, which consists of a quick-change welding tooling and a tail hole elimination tooling; the quick-change welding tooling consists of a bottom plate 8, a back plate 3, a first backing plate 5, a second backing plate 6, a fastening tooling 7, a positioning block 4, and a lead-out block 9; the tail hole elimination tooling is the lead-out block 9.
[0064] The bottom plate 8 is located below the welding area, and the back plate 3 is located on the side of the welding area and is fixed on the bottom plate 8 through a clamping device. During welding, the first backing plate 5, the phase change heat control member 2, and the second backing plate 6 are all placed on the bottom plate 8. The first backing plate 5 is next to the back plate 3. The phase change heat control member 2 is placed between the first backing plate 5 and the second backing plate 6. The second backing plate 6 is located outside the phase change heat control member 2.
[0065] The first backing plate 5 has the same maximum outer shape as the phase change thermal control component 2, and is a rectangular thin plate with dimensions of 20 mm × 230 mm × 150 mm; the second backing plate 6 has the shape of a rectangular thin plate with dimensions of 20 mm × 230 mm × 130 mm, and its height is 20 mm lower than that of the phase change thermal control component 2 to leave space for placing the lead-out block 9. The edges of the first backing plate 5 and the second backing plate 6 that are flush with the bottom plate 8 have the same length.
[0066] The positioning block 4 is vertically fixed on the back plate 3 and is located at the edge of the welding workpiece, i.e., the narrow-side structure phase change thermal control component 2. Its shape is rectangular or square, and its dimensions are 40 mm × 40 mm × 40 mm. The lead-out block 9 has the shape of a cuboid, and its material is the same as that of the narrow-side structure phase change thermal control component 2. Its size specification is 20 mm × 20 mm × 230 mm. The lead-out block 9 is placed on the second backing plate 6 and is pressed onto the narrow-side structure phase change thermal control component 2 through the fastening tooling 7.
[0067] There are at least 4 fastening toolings 7, and each fastening tooling consists of 1 supporting part and 1 pressing part; the supporting part is vertically fixed on the back plate 3 near the edge through a nut, and it is a screw rod in the shape of a cylinder; the pressing part is vertically sleeved on the supporting part, and it is a frame in the shape of a quasi-rectangular parallelepiped sheet. There is a nut on its outer side, and the pressing part is pressed through the cooperation of the nut and the screw rod.
[0068] During welding, the first backing plate 5, the phase change thermal control component 2, and the second backing plate 6 are sequentially placed on the bottom plate 8 in the direction away from the back plate 3. The welding surface of the phase change thermal control component 2 is placed on the upper part for easy welding. The first backing plate 5 is next to the back plate 3. The phase change thermal control component 2 is placed between the first backing plate 5 and the second backing plate 6. The second backing plate 6 is located outside the phase change thermal control component 2. The lead-out block 9 is placed on the second backing plate 6. The pressing parts of 2 fastening toolings 7 are located outside the lead-out block 9, and the other several are located outside the second backing plate 6. By turning the nuts on the outer sides of the pressing parts, the pressing is carried out to fasten the narrow-side structure phase change thermal control component 2 in the tooling, preventing it from moving during the welding process. The deformation of the product can be controlled, the stability and quality of welding can be ensured, and the welding strength and weld quality can be improved.
[0069] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.
Claims
1. A friction stir welding tool for a narrow-edge structure phase change thermal control component, characterized in that: Including quick-change welding fixture for fixing and tail hole elimination fixture for tail hole elimination; The quick-change welding fixture includes a bottom plate, a back plate, a first pad, a second pad, a fastening fixture and a positioning block; the tail hole elimination fixture is a lead-out block; The base plate is used to be connected to the workbench, the back plate is used to provide a fixed abutment surface for the narrow-edge structure phase change thermal control component, the positioning block is used to locate the placement position of the narrow-edge structure phase change thermal control component, and the first pad, the second pad and the fastening tool are used to clamp and fix the narrow-edge structure phase change thermal control component.
2. The friction stir welding tool according to claim 1, characterized in that: The bottom plate is fixedly connected to the workbench; the back plate is vertically fixedly connected to the bottom plate; the positioning block is vertically fixedly connected to the back plate; the first pad and the second pad are both movable plates; the lead-out block is a movable crimping part independent of the first pad and the second pad.
3. The friction stir welding tool according to claim 1, characterized in that: There are ≥4 fastening fixtures, and each fastening fixture consists of a supporting part and a pressing part; the supporting part is vertically fixedly connected to the back plate; and the pressing part is vertically embedded on the supporting part.
4. The friction stir welding tool according to claim 1, characterized in that: The first pad has a maximum shape that is consistent with the maximum shape of the narrow-edge structure phase-change thermal control component and is a rectangular thin plate.
5. The friction stir welding tool according to claim 4, characterized in that: The second pad has the same length as the first pad and is lower in height than the first pad.
6. The friction stir welding tool according to claim 5, characterized in that: The positioning block is rectangular or square.
7. The friction stir welding tool according to claim 5, characterized in that: The length of the lead-out block is consistent with the length of the second pad.
8. The friction stir welding tool according to claim 7, characterized in that: The material of the lead-out block is consistent with the material of the narrow-edge structure phase-change thermal control component.
9. The friction stir welding tool according to claim 3, characterized in that: The supporting part is a cylindrical screw, and the pressing part is threadedly connected to the supporting part.
10. The friction stir welding tool according to any one of claims 1 to 9, characterized in that: The first pad, the narrow-side structure phase-change thermal control component and the second pad are placed on the bottom plate in sequence along the direction away from the back plate, the welding surface of the narrow-side structure phase-change thermal control component is placed on the upper part, the first pad is close to the back plate, the narrow-side structure phase-change thermal control component is placed between the first pad and the second pad, the second pad is located on the outside of the phase-change thermal control component, the lead-out block is placed on the second pad, the clamping parts of the two fastening fixtures are located on the outside of the lead-out block, and the clamping parts of the other fastening fixtures are located on the outside of the second pad.