Hydraulic expansion core shaft

Abstract

The invention provides a hydraulic expansion core shaft. Moving of an oil cylinder piston rod is controlled through hydraulic pressure, thus moving of a disc connecting rod is controlled, and then moving of a sliding block is controlled; and different parameters are input into a numerical control system, a solenoid valve can control the piston rod to move at different distances, so that the sliding block provides different clamping force for workpieces of different inner diameters.

Description

technical field [0001] The invention relates to the field of mandrel clamping, in particular to a hydraulic expansion mandrel. Background technique [0002] Expanding mandrels are usually used for thin-walled round tubes, rings and barrels. This type of fixture clamps the workpiece from the inner hole of the workpiece outwards, thereby processing the outer circular surface and both ends of the workpiece. The advantage of expanding the mandrel is that Only one clamping of the workpiece can be processed in multiple processes, and it has been widely used in various fields now. [0003] However, at present, workpieces with different inner diameters need to be clamped by expanded mandrels of different sizes. When replacing parts, the fixture must be replaced, which virtually increases the work efficiency of workers and reduces production efficiency. Moreover, when using the current expanded mandrel to clamp the workpiece, for different processes, such as turning and grinding, th...

AI Technical Summary

Problems solved by technology

[0003] However, at present, workpieces with different inner diameters need to be clamped by expanded mandrels of different sizes. When replacing parts, the fixture must be replaced, which virtually increases the work efficiency of workers and reduces production efficiency.

Moreover, when using the current expanded mandrel to clamp the workpiece, for different processes, such as turning and grinding, the magnitude of the clamping force is different, and it is necessary to replace the different expanded mandrel, which is time-consuming and laborious, and seriously reduces the processing efficiency.

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