Design concept: Ribbed square tubes and the welding of ribbed square tubes: As the products to be welded are hollow square pipe with surface coating, four welding transformers are required (four welding spots arranged in the middle, including two transformers for double-sided single point welding, and one transformer for double-sided single point welding on bilateral and unilateral positions. Two cylinders are equipped on both sides of each transformer; if seven welding spots are needed, the transformer will finish product welding in two runs). Welding speed requirements: No less than 40 pieces per hour; Welding spots shall be neat and attractive. To guarantee stable welding quality and high production efficiency, our company formulates a professional solution based on accumulated technical experience and actual customer requirements: Adopt gantry welding principle with high-power and high-energy welding current; medium frequency inversion welding is preferred for its superior current density; the structural rigidity of electrodes and fixtures as well as the guiding performance of the machine frame are designed to exceed ordinary gantry welders.
Specially customized double-feed welding molds coordinate welding process and material arrangement perfectly, making full use of the idle waiting time of single-mold welding in traditional operation and greatly improving welding capacity. To perfectly match the overall process layout of IBCs Production Line, our company has independently developed a professional medium frequency inversion double mold protective cage welder. Classified as a high-efficiency Automatic Welding Machine, this medium frequency inversion dedicated welder for ribbed square tube protection cage mainly consists of gantry body, medium frequency inversion control system, electrical operating system, special supporting transformers, dedicated welding pressurized cylinders, upper and lower electrodes, double-feed die racks, cooling circuits, pneumatic systems, monitoring devices and safety protection mechanisms.
Equipment constitution
This device adopts standard Automatic Type operation configuration, which is mainly composed of gantry machine body, medium frequency inversion constant current welding power source, electrical operating system, special welding pressurized cylinder, upper and lower electrode components, double-mold frame, water cooling systems, pneumatic systems, monitoring devices, security agencies and other core parts, detailed description as follows: 1.Machine body: The vertical reinforced structure is welded with high-quality thick steel plates, equipped with reasonably arranged reinforcing ribs and subjected to stress relief treatment. It features excellent mechanical performance, minimal deformation during operation and outstanding structural toughness.
2.MF inversion DC welding power source is mainly assembled with transformer, controller, inverter, power drive unit, rectifier components, capacitor plates, IGBT and central control modules. As a kind of advanced and widely applied welding equipment, medium frequency inversion constant current welding power source boasts compact welding transformer size with strong energy output. It converts the original 50/60Hz input voltage into 1000Hz, and the rectified diode in the transformer secondary circuit converts power into constant current supply, which greatly optimizes the secondary circuit reactance coefficient — a major cause of energy loss in old-type equipment. The constant current welding circuit achieves optimal matching in design, effectively lowering overall production costs. Compared with conventional welding power source, it has the following
| Advantages | Save energy |
| Improve the power factor and reduce production costs; |
| In the secondary circuit with large opening area, interference can be reduced and welding current is constant current. When the secondary winding has inductive materials (with magnetic property), it will not affect the welding |
| make a balance of the loading of power supply device, medium frequency inversion constant current welding power source uses three-phase power and stores energy |
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