Which Type of Spot Welding Machine Should Be Selected for Mass Production of Metal Shelves with Multiple Welding Points Simultaneously?

The crossbeams, columns, shelves and other components of metal shelves often require welding 4-8 or even more welding points at the same workstation. "Simultaneous welding of multiple welding points" is the key to improving efficiency in mass production. Many manufacturers are unsure which spot welding machine to choose, but the core is to match the welding requirements and production scale of the shelves, and accurately select from dimensions such as model type and power configuration.

Firstly, it is necessary to clarify the core requirements: shelves are mostly made of low-carbon steel or stainless steel, with plate thickness ranging from 1.5 to 3.0 millimeters. The distribution of welding points is regular and the spacing is fixed. After welding, it is necessary to ensure that the joints are firm (with a tensile strength of not less than 80 MPa), and to adapt to the batch production capacity of thousands of welding points per hour. Based on this, multi head spot welding machine is the optimal solution for simultaneous welding of multiple welding points, which is 3-5 times more efficient than single head spot welding machine and can avoid the synchronization problem of multiple single head machines working together.

The selection of multi head spot welding machine should focus on three key points:

first, the number and arrangement of welding heads. Customize the welding head group based on the number of welding points of the shelf components. For example, if 6 welding points are required for the connection between the layer board and the support legs, choose a 6-head spot welding machine. The spacing between the welding heads can be adjusted according to the shelf size (usually 50-300 millimeters adjustable) to ensure alignment with all welding points at once; 

The second is power matching. Each welding head needs to independently output current, and the total power should have sufficient margin. For example, a 6-head welding machine requires 15KVA power per head. It is recommended to choose a model with 100KVA or above to avoid virtual welding caused by insufficient current during simultaneous welding; 

The third type is the pressurization mechanism. Priority should be given to pneumatic pressurization, which has stable pressure (adjustable from 0.3-0.8MPa) and fast response, ensuring even pressure at multiple welding points. It is more suitable for batch continuous operation than mechanical pressurization.

In addition to multi head spot welding machines, if there are many scattered welding points on the shelf, gantry spot welding machines can also be used with multiple sets of welding guns. The gantry frame has a large span (up to 2-3 meters) and can cover large shelf components. Multiple sets of welding guns can be programmed to achieve synchronous welding at different positions, providing higher flexibility and suitable for mass production of multi specification shelves.

Attention should also be paid to the durability and adaptability of the equipment. The welding environment of shelves is often dusty, and a welding machine with dust-proof design should be selected; At the same time, the welding machine needs to support integration with automatic feeding and unloading mechanisms, such as using conveyor belts to achieve full process automation of "loading positioning welding unloading", further improving batch production efficiency. If only manually assisted, a regular multi head spot welding machine can complete 800-1200 solder joints per hour, while with automated configuration, it can increase to over 2000.

The efficiency and stability of equipment are crucial for the welding of multiple welding points in the mass production of metal shelves. The number of welding heads for PDKJ multi head spot welding machine can be customized, with sufficient power and stable pressure, which can accurately match the welding needs of multiple welding points on shelves. It also supports automation transformation, helping manufacturers efficiently complete mass production and reduce labor costs.

If you have welding machine requirements, please contact Ms. Zhao

E-Mail: pdkj@gd-pw.com

Phone: +86-13631765713