Cooling structure for projection welding of automobile stamping parts
By designing a diversion pipe and nozzle assembly, uniform cooling of the electrodes is achieved, solving the problem of uneven cooling water distribution, improving welding quality, and extending equipment life.
Patent Information
- Application Number
- CN202520379093.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-05
AI Technical Summary
In the current process of projection welding of automotive stamping parts, uneven distribution of cooling water leads to excessively high local temperatures on the electrodes, affecting the welding effect and potentially damaging the equipment.
The design employs a split pipe and nozzle assembly. After the cooling water is injected from the inlet pipe, it is evenly sprayed onto the electrode through the top and side nozzles, forming an orderly flow path to ensure uniform cooling of all parts of the electrode.
It significantly improves cooling efficiency, avoids welding defects, enhances welding quality, and extends equipment lifespan.
Smart Images
Figure CN223889132U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding technology, and in particular to a cooling structure for projection welding of automotive stamping parts. Background Technology
[0002] In the projection welding process of automotive stamping parts, projection welding machines are indispensable equipment. These machines weld the stamping parts using electrodes, generating a significant amount of heat during the process. To ensure welding quality and the normal operation of the equipment, effective cooling of critical components such as the electrodes is essential. Currently, the industry commonly uses water cooling for electrodes, typically by directly introducing cooling water into the electrode or circulating it through simple cooling channels. However, this traditional cooling method suffers from poor cooling efficiency, especially under high-frequency welding and high-heat generation conditions. Uneven distribution of cooling water leads to excessively high localized electrode temperatures, affecting welding performance and potentially damaging the electrodes and equipment. Therefore, developing an efficient and uniform cooling structure is crucial for improving the projection welding quality of automotive stamping parts and extending equipment lifespan. Utility Model Content
[0003] The main objective of this invention is to provide a cooling structure for projection welding of automotive stamping parts, in order to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A cooling structure for projection welding of automotive stamping parts includes a base plate with an electrode holder containing a first cavity on the base plate. An electrode is mounted on the top of the electrode holder. The electrode has a blind tube structure with a second cavity inside, and a diverter pipe is installed in the second cavity. The diverter pipe includes a connecting section and a diverting section. The connecting section is threaded to the electrode, and the diverting section has a narrowed outer diameter that is spaced from the sidewall of the second cavity. A stepped through hole is opened in the center of the diverter pipe, and multiple overflow holes communicating with the stepped through hole are opened at the lower end of the diverting section. A water inlet pipe and a water outlet pipe are respectively connected to both sides of the electrode holder. The water inlet pipe passes through the first cavity, the stepped through hole, and the second cavity in sequence, and a nozzle assembly is provided at the top of the water inlet pipe.
[0006] Furthermore, the nozzle assembly includes a top nozzle and side nozzles. The top nozzle sprays upwards, and the side nozzles are arranged around the water inlet pipe, spraying towards the side wall of the second cavity.
[0007] Furthermore, the electrode holder has a first internal thread at its top and a first external thread at its lower end that connects to the first internal thread. The lower end of the electrode has a second internal thread on its inner side, and the connecting section of the shunt tube has a second external thread that connects to the second internal thread.
[0008] Furthermore, a first limiting ring is provided on the outer side of the electrode, and a second limiting ring is provided at the lower end of the connecting section of the shunt tube.
[0009] Furthermore, a sealing ring is provided at the lower end of the first limiting ring.
[0010] Furthermore, a first solenoid valve is installed on the inlet pipe, and a second solenoid valve is installed on the outlet pipe.
[0011] This invention also includes other components that enable the cooling structure for projection welding of the automotive stamping part to function properly. These devices or components all employ conventional techniques in the art. Furthermore, devices and components not specified in this invention all employ conventional techniques in the art, such as the sealing rings mentioned in this application. In specific implementation, appropriate equipment or component models can be selected according to the specific working scenario.
[0012] The working principle of this invention is as follows: Cooling water is injected through the inlet pipe and flows sequentially through the first cavity of the electrode holder, the stepped through-hole of the distributor pipe, and the second cavity of the electrode. The nozzle assembly at the top of the inlet pipe divides the cooling water into two parts: the top nozzles spray upwards, directly cooling the top of the second cavity of the electrode; the side nozzles are arranged around the inlet pipe, spraying towards the sidewall of the second cavity. The cooling water flows along the gap between the electrode and the distributor pipe, and flows into the stepped through-hole through the overflow hole at the lower end of the distributor, flowing into the first cavity together with the top-sprayed cooling water, and finally exiting from the outlet pipe, completing the cooling cycle. By optimizing the flow path of the cooling water and the spraying method of the nozzle assembly, the cooling water can evenly cover all parts of the electrode, ensuring that the electrode maintains a good cooling effect throughout the welding process.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. Significantly improves cooling effect: Through the design of the top nozzle and side nozzles of the nozzle assembly, cooling water can be sprayed evenly on all parts of the electrode, avoiding the problem of uneven distribution of cooling water in traditional cooling methods, thus significantly improving the cooling effect.
[0015] 2. Optimize the cooling water flow path: The structural design of the split pipe and overflow hole enables the cooling water to form an orderly flow path inside the electrode, further improving the cooling efficiency and ensuring that the electrode can maintain a good cooling state even under high heat generation.
[0016] 3. Improved welding quality: Due to the significant improvement in cooling effect, the electrode can always be kept within a suitable temperature range during the welding process, avoiding welding defects caused by local overheating, thereby significantly improving the welding quality of automotive stamping parts.
[0017] 4. Extend equipment lifespan: Effective cooling can reduce thermal fatigue and wear of electrodes, reduce equipment maintenance costs and replacement frequency, thereby extending the service life of the projection welding machine. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0019] Figure 2 This is a schematic diagram of the electrode structure of this utility model.
[0020] Figure 3 This is a schematic diagram of the structure of the diversion tube of this utility model.
[0021] Figure 4 This is a schematic diagram of the nozzle assembly of this utility model.
[0022] In the diagram: 1. Base plate; 2. Electrode holder; 21. First cavity; 22. First internal thread; 3. Electrode; 31. Second cavity; 32. First external thread; 33. First limiting ring; 34. Second internal thread; 4. Diverter pipe; 41. Connecting section; 42. Diverter section; 43. Stepped through hole; 44. Second external thread; 45. Overflow hole; 46. Second limiting ring; 5. Inlet pipe; 51. First solenoid valve; 6. Nozzle assembly; 61. Top nozzle; 62. Side nozzle; 7. Outlet pipe; 71. Second solenoid valve; 8. Sealing ring. Detailed Implementation
[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0024] Example:
[0025] like Figures 1-4 As shown, a cooling structure for projection welding of automotive stamping parts includes a base plate 1. An electrode holder 2 containing a first cavity 21 is mounted on the base plate 1, and an electrode 3 is mounted on the top of the electrode holder 2. The electrode 3 is a blind tube structure, with a second cavity 31 inside. A diversion pipe 4 is installed inside the second cavity 31. The diversion pipe 4 includes a connecting section 41 and a diversion section 42. The connecting section 41 is threadedly connected to the electrode 3, and the diversion section 42 has a narrowed outer diameter that forms a gap with the sidewall of the second cavity 31. A stepped through-hole 43 is opened in the center of the diversion pipe 4, and multiple overflow holes 45 communicating with the stepped through-hole 43 are opened at the lower end of the diversion section 42. An inlet pipe 5 and an outlet pipe 7 are respectively connected to both sides of the electrode holder 2. The inlet pipe 5 passes sequentially through the first cavity 21, the stepped through-hole 43, and the second cavity 31, and a nozzle assembly 6 is provided at the top of the inlet pipe 5.
[0026] The nozzle assembly 6 includes a top nozzle 61 and a side nozzle 62. The top nozzle 61 sprays upwards, and the side nozzle 62 is arranged around the water inlet pipe 5 and sprays towards the side wall of the second cavity 31.
[0027] Specifically, the electrode holder 2 has a first internal thread 22 at its top, and the electrode 3 has a first external thread 32 at its lower end that connects to the first internal thread 22. The lower end of the electrode 3 has a second internal thread 34 on its inner side, and the connecting section 41 of the shunt pipe 4 has a second external thread 44 that connects to the second internal thread 34.
[0028] In addition, a sealing ring 8 is provided at the lower end of the first limiting ring 33. The first limiting ring 33 is provided on the outside of the electrode 3, and a second limiting ring 46 is provided at the lower end of the connecting section 41 of the diversion pipe 4. A first solenoid valve 51 is provided on the water inlet pipe 5, and a second solenoid valve 71 is provided on the water outlet pipe 7.
[0029] The working principle of this utility model's cooling structure for projection welding of automotive stamping parts is as follows: Cooling water is injected from the inlet pipe 5 and flows sequentially through the first cavity 21 of the electrode holder 2, the stepped through hole 43 of the diversion pipe 4, and the second cavity 31 of the electrode 3. The nozzle assembly 6 at the top of the inlet pipe 5 divides the cooling water into two parts: the top nozzle 61 sprays upwards, directly cooling the top of the second cavity 31 of the electrode 3; the side nozzles 62 are arranged around the inlet pipe 5, spraying towards the side wall of the second cavity 31. The cooling water flows along the gap between the electrode 3 and the diversion pipe 4, and flows into the stepped through hole 43 through the overflow hole 45 at the lower end of the diversion pipe, flowing into the first cavity 21 together with the top-sprayed cooling water, and finally being discharged from the outlet pipe 7, completing the cooling cycle. By optimizing the flow path of the cooling water and the spraying method of the nozzle assembly 6, the cooling water can evenly cover all parts of the electrode 3, ensuring that the electrode 3 maintains a good cooling effect throughout the welding process.
[0030] The above embodiments are merely descriptions of preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope of the present utility model.
Claims
1. A cooling structure for projection welding of automotive stamping parts, comprising a base plate (1), wherein an electrode holder (2) containing a first cavity (21) is provided on the base plate (1), and an electrode (3) is mounted on the top of the electrode holder (2), characterized in that: The electrode (3) is a blind tube structure, and a second cavity (31) is provided inside the blind tube. A diversion pipe (4) is installed in the second cavity (31). The diversion pipe (4) includes a connecting section (41) and a diversion section (42). The connecting section (41) is threadedly connected to the electrode (3). The outer diameter of the diversion section (42) is narrowed and forms a gap with the side wall of the second cavity (31). A stepped through hole (43) is opened in the center of the diversion pipe (4). A plurality of overflow holes (45) communicating with the stepped through hole (43) are opened at the lower end of the diversion section (42). A water inlet pipe (5) and a water outlet pipe (7) are respectively connected to both sides of the electrode seat (2). The water inlet pipe (5) passes through the first cavity (21), the stepped through hole (43) and the second cavity (31) in sequence. A nozzle assembly (6) is provided at the top of the water inlet pipe (5).
2. The cooling structure for projection welding of automotive stamping parts according to claim 1, characterized in that: The nozzle assembly (6) includes a top nozzle (61) and a side nozzle (62). The top nozzle (61) sprays upwards, and the side nozzle (62) is arranged around the water inlet pipe (5) and sprays towards the side wall of the second cavity (31).
3. The cooling structure for projection welding of automotive stamping parts according to claim 1, characterized in that: The electrode holder (2) has a first internal thread (22) at the top, and the electrode (3) has a first external thread (32) at the lower end that connects to the first internal thread (22); the electrode (3) has a second internal thread (34) on the inner side of the lower end, and the connecting section (41) of the shunt pipe (4) has a second external thread (44) that connects to the second internal thread (34).
4. The cooling structure for projection welding of automotive stamping parts according to claim 1, characterized in that: The electrode (3) is provided with a first limiting ring (33) on the outside, and the lower end of the connecting section (41) of the shunt pipe (4) is provided with a second limiting ring (46).
5. The cooling structure for projection welding of automotive stamping parts according to claim 4, characterized in that: The lower end of the first limiting ring (33) is provided with a sealing ring (8).
6. The cooling structure for projection welding of automotive stamping parts according to claim 1, characterized in that: The inlet pipe (5) is equipped with a first solenoid valve (51), and the outlet pipe (7) is equipped with a second solenoid valve (71).