Shearing synchronous oil circuit for flash welding machine

Abstract

The invention discloses a shearing synchronous oil circuit for a flash welding machine, which comprises a first shearing cylinder, a second shearing cylinder, a three-position four-way reversing valve and a synchronous motor. The first shearing cylinder and the second shearing cylinder are respectively provided with a first cavity and a second cavity, the three-position four-way reversing valve is provided with a first oil port, a second oil port, a third oil port and a fourth oil port, the first oil port of the three-position four-way reversing valve is connected with an oil inlet circuit, the third oil port of the three-position four-way reversing valve is connected with an oil return circuit, both a first inlet and a second inlet at one end of the synchronous motor are communicated with the second oil port of the three-position four-way reversing valve, a first outlet and a second outlet at the other end of the synchronous motor are correspondingly communicated with the first cavities of the first shearing cylinder and the second shearing cylinder respectively, and both the second cavities of the first shearing cylinder and the second shearing cylinder are communicated with the fourth oil port of the three-position four-way reversing valve. By the aid of the shearing synchronous oil circuit, the volume of oil entering the two shearing cylinders can be equivalent during shearing, and the movement speeds of the two shearing cylinders can be uniform.

Description

technical field [0001] The invention relates to engineering machinery rail welding equipment. Background technique [0002] The push-up mechanism of the mobile flash welder is used to automatically remove the welding bump on the rail after welding, and it includes two push-up oil cylinders, an auxiliary frame and a push-up oil circuit. A diverter valve is used in the push-up oil circuit to make the volume of hydraulic oil entering the two push-up cylinders equal, so as to ensure that the extension speeds of the two push-up cylinders are consistent (that is, the cylinders are synchronized), and the push-up force reaches 475kN, which can smoothly push off the welding tumor . The thrusting process is controlled by the diverter valve, and the synchronization accuracy is low. In the unbalanced resistance and no-load stage, the synchronization effect is poor; affected by the harsh outdoor working environment, the movement deviation of the two thrusting cylinders gradually increas...

AI Technical Summary

Problems solved by technology

The pushing process is controlled by the diverter valve, and the synchronization accuracy is low. In the unbalanced resistance and no-load stage, the synchronization effect is poor; affected by the harsh outdoor working environment, the movement deviation of the two pushing and convex cylinders gradually increases.

After some rail welding equipment has been used for a period of time, the deviation exceeds 10% of the total stroke. The pushing process will damage the rail base material and affect the quality of the welded joint.

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