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英文版：

Rong Shijie hot forming plate spot welding technology.
Abstract: Rongshijie's IF adaptive resistance spot welding uses a visualization method of dynamic resistance sample curve, which can easily obtain the dynamic resistance characteristic curves of various thermoformed steel sheets, and analyze in detail, different types and different manufacturers. The dynamic resistance characteristic curve of the thermoformed steel sheet is provided, so that the qualified welding specifications of various thermoformed steel sheets and the dynamic resistance sample curve thereof can be quickly obtained; the qualified solder joints of the welded thermoformed steel sheet can be accurately obtained (no splash, no burr) Immediately, the dynamic resistance sample curve is downloaded to Bosch's welding controller. Next, the adaptive adjustment function is turned on, so that the quality of the welded joint of the thermoformed steel plate can be perfectly closed-loop controlled without splashes and burrs. Thoroughly solve the welding process problems that have long plagued automobile factories.
What is a thermoformed steel body part?

The boron steel plate (initial strength is 500~600MPa) is heated to the austenitizing state, and is quickly transferred to the high-speed stamping forming in the mold. Under the condition of ensuring a certain pressure, the workpiece is more than 27 ° C / s in the mold body. The cooling rate is quenched and quenched for a period of time to obtain ultra-high strength steel parts (1300-1600 MPa) with uniform martensite structure.

Why use thermoformed steel body parts?



Extremely high material strength and ductility. The tensile strength of a general high-strength steel sheet is about 400-450 MPa, and the tensile strength of the hot-formed steel before heating is 500-800 MPa, and is increased to 1300-1600 MPa after heat forming. Therefore, the body made of thermoformed steel plate greatly improves the collision capability and overall safety of the vehicle body, and plays a good role in protecting the inside of the vehicle during the collision.

Effectively reduce the weight of the vehicle and save energy. Due to the extremely high material strength of thermoformed steel sheets, it is possible to replace a number of common steel sheet parts with a hot formed part during design. This kind of parts has thin thickness, light weight and high strength. It is suitable for the manufacture of automobile A-pillar reinforced version, B-pillar reinforced version, floor parts and front end, etc., which can improve safety and reduce weight for automobiles.

Floor reinforced panels use thermoformed steel sheets

Floor reinforced panels use thermoformed steel sheets

Side-walled A/B column reinforcement uses thermoformed steel

Side-walled A/B column reinforcement uses thermoformed steel

As mentioned above, thermoformed steel sheets have many advantages and are therefore becoming more and more popular in automotive plants. However, due to the special welding performance of the resistance spot welding of the thermoformed steel sheet, the welding parameter band is very narrow, and the welding resistance of the thermoformed steel sheet provided by different manufacturers is also large, and the resistance welding properties of the imported and domestic thermoformed steel sheets are also The large difference is a serious challenge to the spot welding process of the parts of the automaker. It is difficult for automakers to solve the large splashes and large burrs that occur during spot welding of hot-formed steel sheets. Therefore, only the subsequent burr grinding process can be used to solve this problem. Setting the grinding process not only pollutes the environment, but also wastes manpower and material resources, and also reduces the overall production efficiency of auto parts.


Severe post-weld burrs at each solder joint during spot welding of hot-formed steel sheets

Severe post-weld burrs at each solder joint during spot welding of hot-formed steel sheets

Use Rongshijie IF welding technology - spot welding of sputter-free, burr-free thermoformed steel sheets

Rong Shijie's medium frequency resistance spot welding uses a visualization method of dynamic resistance sample curve. It can easily obtain the dynamic resistance characteristic curves of various thermoformed steel sheets, and analyze in detail the different types and different manufacturers provide thermoforming. The dynamic resistance characteristic curve of the steel plate, so as to quickly obtain the qualified welding specifications of various thermoformed steel sheets and their dynamic resistance sample curves; after accurately obtaining the qualified solder joints of the welded thermoformed steel sheets (no splash, no burr), immediately The dynamic resistance sample curve is downloaded to Bosch's welding controller. Next, the adaptive adjustment function is turned on, so that the solder joint quality of the thermoformed steel plate can be perfectly closed-loop controlled, and there is no splash and burr, and the long-term trouble is easily solved. The welding process of the car factory.



At present, Rongshijie's sample curve thermoformed plate welded thermoformed steel plate technology has been widely used in most domestic automobile factories, and received rave reviews. Whether in the manual welding station or the robotic welding station, Rongshijie's medium-frequency resistance spot welding technology can be perfectly interpreted.

Bosch Rexroth spot welding of thermoformed steel in manual work