Metal tube shell welding tool with bent lead
By designing a metal tube shell welding tool with bent leads and utilizing the positioning of the bent leads and the limitation of the limit blocks, the operational difficulties and poor welding problems of existing welding tooling in the reliable connection of ceramics and metals are solved, and precise positioning and efficient production during the welding process are achieved.
Patent Information
- Application Number
- CN202510988748.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-17
- Publication Date
- 2025-09-16
AI Technical Summary
Existing welding tooling has problems in the manufacturing process of reliable connection between ceramics and metals, such as difficult operation, long time consumption, complex structure, high processing difficulty, high cost, inaccurate weld position, poor welds, and jamming of components and tooling during welding, resulting in low production efficiency, high cost and unstable product quality.
A welding tool for a metal tube shell with bent leads is designed, which includes a lower die, a limiting die, a solder resisting die, an upper die and a limiting block. The positioning accuracy and dimensional stability during the welding process are ensured by positioning the bent leads and limiting the limiting blocks.
It achieves precise positioning and dimensional stability during the welding process, improves welding reliability, reduces the occurrence of adverse phenomena, and improves production efficiency and product quality.
Smart Images
Figure CN120644900A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of welding tools, in particular to a metal tube shell welding tool with bent leads. Background Art
[0002] In the manufacturing process involving reliable connection between ceramics and metals, the conventional solution usually adopts the method of pre-fixing the ceramic strips, transition rings and solders through leads. The fixed components are placed in the lower fixing fixture, and then covered with the upper fixing fixture with a flat head structure. The ceramic strips, transition rings and solders are welded into an integral component through a single welding process. Afterwards, the integral component is welded to the target metal part for a second time to finally form the desired composite structure. However, the existing solutions have significant defects: first, the upper fixing tool of the flat head structure is difficult to operate during the actual assembly and fixing process, which is time-consuming, and the tooling itself has a complex structure, is difficult to process, and is costly; second, after one welding is completed, due to welding stress and tooling limitations, the components may have size and position offsets. In addition, if the design size of the mold (limiting structure) does not fit well with the inside of the frame, it is very easy to cause inaccurate weld position or produce poor welds during the welding process; in addition, in the crucial second step of welding with metal parts, the fixation and positioning of the solder at high temperature itself is difficult. What is more serious is that the thermal expansion deformation generated by the welding process can cause jamming between the component and the tooling, making subsequent disassembly extremely difficult. These problems not only reduce production efficiency and increase manufacturing costs, but also directly affect the dimensional accuracy, structural reliability and yield of the final product. Summary of the Invention
[0003] The purpose of the present invention is to provide a metal tube shell welding tool with bent leads to solve the above technical problems.
[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A welding tool for a metal tube shell with bent leads includes a lower die and a limiting die. A Kovar ring frame is clamped in the lower die, one end of the bent lead is constrained by the limiting die, and the other end of the bent lead is inserted into the Kovar ring frame. A ceramic bead is provided at the end of the bent lead entering the Kovar ring frame, and the ceramic bead is located on the frame wall of the Kovar ring frame. The limiting mold is located on the adjacent side of the Kovar ring frame, forming a gap between the limiting mold and the Kovar ring frame, and further comprising a solder resist mold. The solder resist mold enters the gap and covers the bent lead. The ceramic bead solder covers the outer periphery of the ceramic bead. The solder resist mold is pushed toward the Kovar ring frame to push the ceramic bead solder into the junction between the ceramic bead and the wall of the Kovar ring frame. It also includes a second stopper, which clamps the limiting mold in the lower mold to fix the bent lead in the Kovar ring frame; It also includes an upper mold and a first stopper, wherein the upper mold covers the oxygen-free copper base above the Kovar ring frame, and the first stopper presses against the combination formed by the oxygen-free copper base and the Kovar ring frame from the lateral position of the Kovar ring frame.
[0005] Preferably, it further comprises a first elastic support member, both ends of which are pressed between the limiting mold and the solder resisting mold.
[0006] Preferably, a second elastic support member is further included, with both ends of the second elastic support member resting between the first stop block and the lower mold.
[0007] Preferably, there is a convex block in the lower mold, and the convex block enters the Kovar ring frame from the bottom of the Kovar ring frame.
[0008] Preferably, the solder die falls into the gap from top to bottom.
[0009] Preferably, the bending angle of the bent lead is 90°.
[0010] Preferably, one end of the bent lead is vertically inserted into the limiting mold, and the other end of the bent lead is horizontally inserted into the Kovar ring frame.
[0011] Preferably, the second stopper is inserted in the limiting mold and is also in close contact with the side wall of the lower mold in the lower mold.
[0012] The beneficial effects of the present invention are: Compared with the existing solution, the present invention adopts a flip-chip form and uses the bending of the lead itself for positioning to ensure the verticality after welding, and adds a limit block to prevent dimensional changes during the welding process, thereby improving welding reliability and effectively reducing the occurrence of adverse phenomena. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a combined structure diagram of ceramic beads and bent leads; Figure 2 It is a structural diagram of a metal tube shell with bent leads; Figure 3 For welding Figure 2 Tooling structure diagram of the structure shown; Figure 4 It is a structural diagram of the lower membrane of the ring frame; Figure 5 for Figure 3 a cross-sectional view of the tooling shown; Figure 6 for Figure 3 The combined structural diagram of the three limiting structures in the tooling shown; Figure 7 for Figure 6 A split diagram of the composite structure shown; Figure markings: 1. lower mold; 2. first stopper; 3. limiting mold; 4. second stopper; 5. solder resist mold; 6. upper mold; 7. solder resist mold extension; 8. opening; 9. protrusion; 10. first groove; 11. second groove; 12. third groove; 13. fourth groove; 14. fifth groove; 15. sixth groove; 16. seventh groove; 17. eighth groove. DETAILED DESCRIPTION
[0014] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.
[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0016] Specific embodiments of the present invention are described below with reference to the accompanying drawings.
[0017] Example 1 In this embodiment, a metal tube shell welding tool with bent leads is proposed. Figure 1 and Figure 2 , the welding tool is Figure 1 The combination of ceramic beads and bent leads shown is similar to Figure 2 The metal shell shown is constrained to be combined, see Figure 1-Figure 7 The welding tool comprises a lower die 1, in which a first groove 10 is formed to form an accommodating space. The bottom of the first groove 10 is concave, and the concave part is a second groove 11. The middle position of the second groove is also concave, and the concave part is a third groove 12. Figure 3 and Figure 4 The bottom of the first groove 10 is located on the left side of the second groove 11. There is a protrusion 9. When the felling ring frame is placed in the first groove 10, the protrusion 9 enters the felling ring frame from the bottom, thereby constraining the felling ring frame to move in the horizontal direction.
[0018] See also Figure 3 and Figure 4 The third groove 12 is filled with a limiting mold 3, which has two parallel channels from top to bottom. Figure 1 The two bent leads shown have one end inserted into each channel. Figure 5The limiting mold 3 can move linearly under the constraint of the third groove 13. When the limiting mold 3 moves toward the kovable ring frame, the other end of the bent lead can be inserted into the kovable ring frame from the preset hole position of the kovable ring frame. It should be noted that there is a pre-welded ceramic bead at one end of the bent lead entering the kovable ring frame, and the ceramic bead is exactly located at the hole position. It further illustrates that the hole position is in the concave area of the kovable ring frame wall.
[0019] See also Figure 7 In addition to the two parallel channels, the limiting mold 3 has other functional designs. First, the limiting mold 3 has an eighth groove 17. Please refer to Figure 5 When the limiting mold 3 is located in the third groove 12, the bottom of the eighth groove 17 is flush with the bottom of the first groove 10; secondly, the adjacent side of the eighth groove 17 is a protrusion, and a gap is formed between the protrusion and the Kovar ring frame. In addition, there are two seventh grooves 16 where the protrusion is located. Figure 7 It can be seen that the bent lead is further confined in the seventh groove 16 ; thirdly, the protrusion is adjacent to the sixth groove 15 , which will be used together with the second stopper 4 .
[0020] See also Figure 3 、 Figure 5 and Figure 6 The solder mold 5 falls into the gap from top to bottom. The solder mold 5 has two fifth grooves 14. The fifth grooves 14 are actually open grooves. After the solder mold 5 falls into the gap, the grooves cover two bent leads. Figure 5 and Figure 6 A solder resist extension portion 7 is provided on one side of the solder resist 5. Before welding, the personnel will put the ceramic bead solder on the outer periphery of the ceramic bead. In this way, when the solder resist 5 moves toward the Kovar ring frame, the ceramic bead solder will be pushed into the concave area and into the junction of the ceramic bead and the hole.
[0021] See also Figure 3 、 Figure 5-Figure 7 As described above, the sixth groove 15 is used in conjunction with the second stopper 4. The second stopper 4 has a fourth groove 13 at its bottom. The fourth groove 13 is stuck in the sixth groove 15 when the second stopper 4 falls from top to bottom toward the sixth groove 15. After being firmly locked, the second stopper 4 will be in close contact with the side wall of the lower mold 1, preventing the limiting mold 3 from moving linearly, and firmly clamping the limiting mold 3 in the third groove 12. Further explanation: In this embodiment, a first elastic support member (not shown in the figure) is also provided. The first elastic support member can be a spring. When in use, the two ends of the first elastic support member will abut between the limiting mold and the soldering die, thereby firmly pushing the ceramic bead solder to the junction of the ceramic bead and the hole, waiting for subsequent welding.
[0022] See also Figure 3 and Figure 5The lower mold 1 houses an upper mold 6 and a first stopper 2. The upper mold 6 covers the oxygen-free copper base above the Kovar frame, while the first stopper 2 presses against the combination of the oxygen-free copper base and the Kovar frame from the side of the Kovar frame (with frame solder disposed between the oxygen-free copper base and the Kovar frame). Furthermore, in this embodiment, a second elastic support member (not shown) is also provided. This second elastic support member can also be a spring. During use, the two ends of the second elastic support member press between the first stopper and the lower mold, causing the first stopper 2 to push against the oxygen-free copper base and the Kovar frame from the side. Combined with the pressure of the lower mold 1, the oxygen-free copper base is securely attached to the top of the Kovar frame, ready for subsequent welding.
[0023] In this embodiment, Figure 2 After the assembly is welded, remove the two elastic supports first, and then take out the upper mold 6, the solder mold 5, the second stopper 4 and the first stopper 2 from the lower mold 1. Figure 2 The assembly is removed from the lower die 1. In this embodiment, considering that the bent lead wire requires a certain amount of travel to enter the Kovar ring frame, an opening 8 is provided in the side wall of the lower die 1. The opening 8 faces the third groove 13. This design allows the limiting die 3 to extend its range of movement by moving in and out of the opening 8, thus meeting the required travel range.
[0024] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0025] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.
Claims
1. A welding tool for a metal tube shell with bent leads, characterized by: It includes a lower die and a limiting die, wherein a Kovar ring frame is clamped in the lower die, one end of the bent lead is constrained by the limiting die, and the other end of the bent lead is inserted into the Kovar ring frame. There is a ceramic bead at the end of the bent lead entering the Kovar ring frame, and the ceramic bead is located on the frame wall of the Kovar ring frame; The limiting mold is located on the adjacent side of the Kovar ring frame, forming a gap between the limiting mold and the Kovar ring frame, and further comprising a solder resist mold. The solder resist mold enters the gap and covers the bent lead. The ceramic bead solder covers the outer periphery of the ceramic bead. The solder resist mold is pushed toward the Kovar ring frame to push the ceramic bead solder into the junction between the ceramic bead and the wall of the Kovar ring frame. It also includes a second stopper, which clamps the limiting mold in the lower mold to fix the bent lead in the Kovar ring frame; It also includes an upper mold and a first stopper, wherein the upper mold covers the oxygen-free copper base above the Kovar ring frame, and the first stopper presses against the combination formed by the oxygen-free copper base and the Kovar ring frame from the lateral position of the Kovar ring frame.
2. The metal tube shell welding tool with bent leads according to claim 1, characterized in that: It also includes a first elastic support member, with two ends of the first elastic support member resting between the limiting mold and the solder resisting mold.
3. The metal tube shell welding tool with bent leads according to claim 1, characterized in that: It also includes a second elastic support member, with two ends of the second elastic support member resting between the first stop block and the lower mold.
4. The metal tube shell welding tool with bent leads according to claim 1, characterized in that: There is a convex block in the lower die, and the convex block enters the Kovar ring frame from the bottom of the Kovar ring frame.
5. The metal tube shell welding tool with bent leads according to claim 1, characterized in that: The solder mold falls into the gap from top to bottom.
6. The metal tube shell welding tool with bent leads according to claim 1, characterized in that: The bending angle of the bent lead is 90°.
7. The metal tube shell welding tool with bent leads according to claim 6, characterized in that: One end of the bent lead is vertically inserted into the limiting mold, and the other end of the bent lead is horizontally inserted into the Kovar ring frame.
8. The metal tube shell welding tool with bent leads according to claim 2, characterized in that: The second stopper is inserted into the limiting mold and is also in close contact with the side wall of the lower mold in the lower mold.