Two-level electric resistance welding method for damping clad plate oil sump

Abstract

Disclosed is a method for double-skin resistance welding of oil sump of vibration-damping clad plate in the welding art, which contains: locating the fuel outlet plane of oil sump of vibration-damping clad plate on the location seat of welder, and locating the fuel outlet double-screw bolt on the fuel outlet and aligning. The two upper-electrodes decreasing at the same time, the first upper-electrode pressed on the fuel releasing double-screw bolt, the second upper-electrode pressed on the outer ring of the fuel outlet of the oil sump and near the double-screw bolt, the energy storage capacitor one- time discharging by energy storage welding transformer after the two electrodes are compacted, the second upper-electrode being released after energisation, at the same time the three lower-electrodes of point welding lifting and contacting with the lower steel plate of the fuel outlet of the oil sump and being compacted, energizing by alternating resistance welding transformer to complete the welding of doubling plate, keeping forcing, the second upper-electrode and the three lower-electrodes of point welding being released at the same time, the welding is completed, and finally the sealing and strength connection of fuel releasing double-screw bolt and doubling vibration-damping clad plate is formed. The welding has a high output rate, the sealing of the joint is good and the strength high, and the damage to the intermediate insulating layer of the vibration-damping clad plate is small.

Description

technical field [0001] The invention relates to a method in the technical field of welding, in particular to a double-layer resistance welding method for an oil sump of a vibration-damping composite plate. Background technique [0002] In order to reduce vibration, reduce noise, improve the configuration of diesel engines, and thus improve the comfort of luxury passenger cars, the oil pan of diesel engines is increasingly replaced by the original single-layer steel plate with vibration-damping composite plates. The damping composite plate used on the oil pan is usually composed of two layers of St16 steel plates with a thickness of 0.9mm sandwiching a layer of polymer damping material. The welding equipment and technology of vibration-damping composite plates have always been a major difficulty in the development of this type of oil pan. Welding the oil drain studs on the oil sump with conventional welding methods can only achieve single-layer welding and are prone to penet...

AI Technical Summary

Problems solved by technology

Spot welding the vibration damping plate with this method, although it is proved that the size and strength of the welding spot can be guaranteed under certain welding process parameters, but the existing problems are: (1) the size of the welding section that can be welded is limited; (2) the suitable The range of welding process parameters is small; (3) The damage area to the intermediate insulating layer may be large

In addition, this method is especially unsuitable for the welding of expanded section joints like oil drain studs, and it is difficult to ensure the tightness of the joints by ensuring the uniformity of the current