Resistance welding electrode tip structure
By adopting a resistance welding electrode head with threaded connection and flange structure, the problems of electrode head loosening and falling off are solved, ensuring welding accuracy and stability, realizing a tight connection between the electrode head and the electrode rod, and simplifying the disassembly process.
Patent Information
- Application Number
- CN202423165247.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-21
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-12-21
AI Technical Summary
Existing resistance spot welding electrode heads, with their tapered fit structure, are prone to loosening or falling off due to tangential forces during grinding. Furthermore, rock wool debris can lead to poor conductivity and result in defective welds, affecting welding accuracy and stability.
The electrode head and electrode rod are connected by a threaded connection structure. A flange is provided at the bottom. The root of the thread bears the vertical force. The electrode head is embedded into the electrode rod to a depth of 5mm. During grinding, the thread direction is consistent with the rotation direction to prevent loosening.
It improves the connection stability between the electrode head and the electrode rod, ensures the accuracy of the welding position and the perpendicularity of the electrode head, avoids loosening and falling off, and has a simple structure that is easy to disassemble.
Smart Images
Figure CN223811666U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a resistance welding electrode head structure, is robot resistance spot welding electrode head, apply to industrial welding spot welding machine hand operation field. BACKGROUND
[0002] The existing resistance spot welding electrode head all adopts taper cooperation structure, and this structure has two disadvantages when spot welding the heat shield of the automobile exhaust system:
[0003] One disadvantage is that when the heat shield spot welding electrode head is automatically ground, the grinding reamer will generate a tangent direction force on the electrode head when rotating at high speed, and this force will cause the electrode head to loosen or fall off.
[0004] The second disadvantage is that the exhaust system heat shield has rock wool, and if rock wool debris is mixed in the spot welding position of the heat shield, the electrode head will cause instantaneous resistance increase due to poor conduction, resulting in poor welding spots, and the electrode head is prone to adhere to the workpiece at this time, and when the robot runs to the next point, the electrode head with taper cooperation will be loosened, tilted, or even directly fall off the electrode rod due to the force generated by the adhesion of the surface of the electrode head to the workpiece. SUMMARY
[0005] The utility model discloses a resistance welding electrode head structure, which adopts screw connection to make the connection between the electrode head and the electrode rod more secure, avoid the tangential force generated by the grinding electrode head from causing the electrode head to tilt and loosen, and enhance the position accuracy of spot welding.
[0006] The utility model technical scheme is realized as follows: a resistance welding electrode head structure is composed of a spot welding electrode head and an electrode rod, characterized in that the spot welding electrode head and the electrode rod are connected by screw threads, the bottom of the electrode head has a flange table with a circumference of 1mm, the electrode head and the electrode rod are fastened by screw threads, the flange table of the electrode head is attached to the flange table at the inner hole of the electrode rod, bears the vertical force of spot welding, and the electrode head is embedded in the electrode rod to a depth of 5mm.
[0007] The utility model has the positive effect that the electrode head and the electrode rod are connected by screw threads, which avoids the loosening and falling off of the electrode head caused by grinding, the flange table at the bottom of the screw thread connection adopts a stepped structure, can bear the vertical force of spot welding, compared with the electrode head with taper cooperation, can better ensure the effective length of the electrode head and the electrode rod, and can better ensure the perpendicularity of the downward pressing direction of the electrode head, the rotation direction of the grinding reamer for the electrode is the same as the screw thread direction for fastening the electrode head, that is, the screw thread will become tighter when grinding. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 The utility model discloses an electrode head structure.
[0009] Figure 2 The electrode rod structure diagram matched with the electrode head of the utility model.
[0010] Figure 3 The structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0011] The utility model will be further described in connection with the drawings: as Figures 1-3 The resistance welding electrode head structure is composed of an electrode head 1 and an electrode rod 2, the electrode head 1 is connected with the electrode rod 2 through M6 thread, the electrode head threaded root has 1mm flange platform 3, after the fastening of the electrode head 1 and the electrode rod 2, the electrode head flange platform 3 is attached with the electrode rod flange platform 4. Figure 1 The electrode head is M6 thread with 10mm long root, after the 1mm clearance of the threaded root, it is a 1mm circumferential electrode head flange platform 3. The electrode head flange platform 3 is attached with the 1mm electrode rod flange platform 4 of Figure 2 , and is used to bear the pressure in the vertical direction when spot welding, to avoid the damage of the thread. The total length of the electrode head is 53mm, after the electrode length 28mm, there are two 8mm milling planes for matching the wrench to disassemble the electrode. Figure 3 As shown in the structure diagram after the connection of the electrode head and the electrode rod, this electrode structure is simple, easy to disassemble, and can guarantee the perpendicularity and total length of the electrode. To prevent the thread from bearing too much lateral force when spot welding, in addition to the connecting thread, the electrode head is embedded into the electrode rod by 5mm depth, to ensure that the electrode head will not bend or break at the threaded root after long time spot welding.
[0012] When a certain number of workpieces are spot welded, the hemisphere arc surface of the spot welding electrode head needs to be automatically ground, to remove the oxide layer caused by spot welding to the electrode head. The rotating direction of the high-speed rotating grinding blade is the same as the tightening direction of the thread, which can avoid the loosening or falling off of the electrode head due to the grinding stress.
Claims
1. A resistance welding electrode tip structure consisting of a spot welding electrode tip and an electrode stem, characterized by: The spot welding electrode head and the electrode rod are connected by screw thread, the electrode head has a flange platform of 1mm in the circumferential direction of the bottom of the screw thread, the electrode head and the electrode rod are fastened by screw thread, the flange platform of the electrode head is in close contact with the flange platform at the inner hole of the electrode rod, and the flange platform bears the vertical force of spot welding, and the electrode head is embedded into the electrode rod by 5mm in depth.