Projection welding process
By opening grooves in normal and tangent directions near the welding parts of the plate to form a cross-shaped or T-shaped melting core, the problem of insufficient bonding and strength on thick plates is solved by traditional convex welding processes, and a higher bonding and strength is achieved, which is suitable for the convex welding process of thick plates.
Patent Information
- Application Number
- CN202411917376.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-03-04
AI Technical Summary
After the traditional convex welding process is welded on thick plates, the melting depth and heat-affected zone are large, resulting in a decrease in the bonding force and strength of the convex welding nuts and the plates, and a complex and costly second-conservation welding process is required.
The first and second wire grooves are opened near the welding part of the plate. The first wire grooves are in the normal direction of the welding part, and the second wire grooves are in the tangent direction to form a cross-shaped or T-shaped melting core, thereby enhancing the bonding force and strength of the convex welding nuts and the plate.
Through this process, the bonding force and strength of the convex welding nut and the plate are effectively improved, making the convex welding process more suitable for thick plates, avoiding the use of complex and expensive secondary welding processes.
Smart Images
Figure CN119549855A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a projection welding process. Background Art
[0002] As the number of cars per capita in China has gradually increased, traffic accidents have also increased, and consumers are demanding higher and higher levels of car body strength.
[0003] The traditional projection welding process generally uses traditional projection welding nuts for welding. Since the plate is thin, the penetration depth and heat affected zone after welding are large, and the bonding force and strength of the projection welding nut and the plate are guaranteed after welding.
[0004] In order to further improve the bonding force and strength of the projection welding nut and the plate, the present invention has developed this projection welding process. This projection welding process is particularly suitable for thick plates: because the traditional projection welding process greatly affects the penetration depth and heat-affected zone after welding on thick plates, the bonding force and strength of the projection welding nut and the plate are greatly reduced after welding. At this time, the two-protection welding process with complex process, high cost, long time consumption and low efficiency will be selected; the projection welding process of the present invention can greatly improve the bonding force and strength of the projection welding nut and the plate, so that the projection welding process can be applied to thick plates. Summary of the invention
[0005] The invention discloses a projection welding process, which opens a first wire groove near a welding position of a plate, effectively improves the bonding force and strength of a projection welding nut and the plate after projection welding, and makes the projection welding process more suitable for thick plates.
[0006] A projection welding process, the projection welding process specifically includes: before projection welding, opening a first wire groove 5 near the welding position of the plate 4, and then completing the projection welding.
[0007] Furthermore, the first wire groove 5 is located in the normal direction of the welding part.
[0008] A projection welding process, the projection welding process specifically includes: before projection welding, opening a second wire groove 6 on the head plate 1 close to the welding foot 3, and then completing the projection welding.
[0009] Furthermore, the second wire groove 6 is located in the tangent direction of the welding part.
[0010] Advantages of the present invention:
[0011] 1. The present invention opens a first wire groove near the welding part of the plate, so that the bonding force and strength between the projection welding nut and the plate are effectively improved after projection welding, and the projection welding process is more suitable for thick plates;
[0012] 2. Keep the first wire groove in the normal direction of the welding part and the second wire groove in the tangent direction of the welding part, so that a cross-shaped molten core or a T-shaped molten core is formed at the welding part, which greatly improves the bonding force and strength between the projection weld nut and the plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic diagram of the projection welding process;
[0014] Figure 2 is a top view schematic diagram of the first wire duct;
[0015] Figure 3 is a bottom view schematic diagram of the second wire duct;
[0016] Figure 4 A schematic diagram of a second wire duct with a reverse arc shape;
[0017] In the figure, 1-head plate; 2-middle through part; 3-welding foot; 4-plate material; 5-first wire trough; 6-second wire trough. DETAILED DESCRIPTION
[0018] In each embodiment and comparative example, 20 M10 square nuts were taken and 10 were projection welded on plates with a thickness of 3 mm and 4 mm, respectively. The projection welding was performed using an ADB-130 projection welding machine, with a welding current of 15000A, a welding time of 10cy, an electrode pressure of 0.4Mpa, and the plates were B510L pickled plates from the same batch.
[0019] According to the enterprise standard Q / CAYJ-42-2009 "Quality Inspection of Projection Welded Nuts and Projection Welded Bolts" issued by China First Automobile Group Corporation, and according to Section 5.5 "Detection of Stripping Torque M of Projection Welded Nuts" and Section 5.6 "Detection of Minimum Top Tension F of Projection Welded Nuts", the stripping torque and minimum top tension of the nuts welded by the projection welding process in the following embodiments were tested respectively, and the average values were taken. The results are detailed in the table below.
[0020] Example 1
[0021] A projection welding process, which specifically includes: before projection welding, opening a first wire groove 5 near the welding position of a plate 4, the first wire groove 5 is in the normal direction of the welding position, and then completing the projection welding.
[0022] Example 2
[0023] A projection welding process, which specifically includes: before projection welding, a second wire groove 6 is opened on the head plate 1 close to the welding foot 3, the second wire groove 6 is in the tangent direction of the welding part, and then the projection welding is completed.
[0024] Example 3
[0025] Based on Example 2, the second wire slot is processed as follows Figure 4 The reverse arc shape is shown, and the rest is the same as Example 2.
[0026] Example 4
[0027] A projection welding process, which specifically includes: before projection welding, a first wire groove 5 is opened near the welding position of the plate 4, and the first wire groove 5 is in the normal direction of the welding position; a straight second wire groove 6 is opened on the head plate 1 near the welding foot 3, and the second wire groove 6 is in the tangent direction of the welding position, and then the projection welding is completed.
[0028] Example 5
[0029] Based on Example 4, the second wire slot is processed as follows Figure 4 The reverse arc shape is shown, and the rest is the same as Example 4.
[0030] Example 6
[0031] A projection welding process, which specifically includes: before projection welding, a first wire groove 5 is opened near the welding position of the plate 4, and the first wire groove 5 is in the tangent direction of the welding position; a straight second wire groove 6 is opened on the head plate 1 near the welding foot 3, and the second wire groove 6 is in the normal direction of the welding position, and then the projection welding is completed.
[0032] Comparative Example 1
[0033] The plate 4 and the head plate 1 are directly projected without any treatment.
[0034]
[0035] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A projection welding process, characterized in that: The projection welding process is specifically as follows: before projection welding, a first wire groove is opened near the welding position of the plate, and then the projection welding is completed.
2. The projection welding process according to claim 1, characterized in that: The first wire groove is located in the normal direction of the welding position.
3. A projection welding process, characterized in that: The projection welding process is specifically as follows: before projection welding, a second wire groove is opened on the head plate close to the welding foot, and then the projection welding is completed.
4. The projection welding process according to claim 3, characterized in that: The second wire groove is located in the tangent direction of the welding position.
5. The projection welding process according to claim 3, characterized in that: The second wire groove is in a reverse arc shape.