Basic Requirements for the Design of Fixtures for Medium Frequency Spot Welding Machines

Medium frequency spot welding machines need to have sufficient strength and rigidity to ensure that the fixture works normally during assembly or welding processes, without allowing unacceptable deformation and vibration under the action of clamping force, welding deformation restraint force, gravity, and inertia force.

The design should be simple and lightweight, with a compact structure that ensures strength and rigidity. The volume should be minimized, and the fixture should be lightweight and easy to handle for workpiece loading and unloading. Windows, recesses, and other features can be incorporated into the design in areas where strength and rigidity are not compromised to reduce the structural weight. Especially for manual or mobile fixtures, their weight generally should not exceed 10kg.

The installation should be stable and reliable. The fixture can be placed on the workshop floor or mounted on the workbench (stand) of positioning equipment. To ensure stability, the center of gravity should be kept as low as possible. If the center of gravity is high, the supporting area should be correspondingly increased. Usually, a cavity is excavated in the middle of the bottom surface to allow the periphery to protrude.

The structure should be easy to manufacture, assemble, and inspect. All positioning surfaces and mounting surfaces of the fixture should be machined. For castings, a 3mm-5mm boss should be cast to reduce machining area. A certain gap should be maintained between the rough surface and the workpiece surface, usually 8mm-15mm, to avoid interference with the workpiece. For polished surfaces, a gap of 4mm-10mm is appropriate.

Dimensions should be stable and have a certain level of accuracy. Cast fixtures should undergo aging treatment, and welded fixtures should undergo annealing treatment. Proper size and shape accuracy should be maintained for all positioning surfaces and mounting surfaces.

Convenient cleaning is necessary, as splashes, smoke, slag shells, electrode heads, flux, and other debris may inevitably fall into the fixture during assembly and welding processes.

Suzhou Agera Automation Equipment Co., Ltd. specializes in the development of automated assembly, welding, testing equipment, and production lines, mainly applied in household appliances, automotive manufacturing, sheet metal, 3C electronics industries, etc. We can develop customized welding machines and automated welding equipment according to customer needs, providing suitable automation solutions to help companies quickly transition from traditional production methods to high-end production methods. If you are interested in our automation equipment and production lines, please contact us: leo@agerawelder.com