Device for machining sealing surfaces of valve body and valve plate of butterfly valve at high precision

Abstract

The invention discloses a high-precision butterfly valve body and valve plate sealing face machining device which comprises a base, a workbench and a mounting frame fixedly connected to the front face and the back face of the base, and the workbench is rotationally connected with the base through a thrust ball bearing. According to the device, the main shaft and the workbench are fixed, the vertical shaft frame and the upper center are also fixed, no gap exists between the vertical shaft frame and the upper center, the inclination disc tool is fixed to the center shaft, a workpiece to be machined is fixed to the inclination disc tool, no gap exists obviously, and the rubber pad bears the weight of the workpiece to be machined; meanwhile, the center shaft has the aligning and centering effects, the whole tool part tightly floats on the workbench, the workbench rotates to drive the inclination disc tool and the workpiece to be machined to rotate so as to complete machining of the workpiece, in this way, deviation in the workpiece machining process can be effectively reduced, the sealing effect is more ideal in the pressure testing process after the workpiece is assembled, and the machining efficiency is improved. And the leakage problem is reduced.

Description

technical field [0001] The invention relates to the technical field of butterfly valve processing devices, in particular to a device for high-precision machining of butterfly valve body and valve plate sealing surfaces. Background technique [0002] Butterfly valve, also known as flap valve, is a kind of regulating valve with simple structure. Butterfly valve can be used for on-off control of low-pressure pipeline medium. [0003] At present, ordinary vertical lathes, ordinary horizontal lathes, and CNC vertical lathes are used for the processing of the valve body and valve plate. The CNC horizontal processing of this sealing surface has the advantage of being able to carry out ordinary cutting processing and high efficiency. However, due to the work The inherent gap inside the transmission bearing under the table causes the dimensional deviation during the processing of the workpiece, resulting in an unsatisfactory sealing effect during the pressure test after assembly, and...

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Problems solved by technology

[0003] At present, ordinary vertical lathes, ordinary horizontal lathes, and CNC vertical lathes are used to process the valve body and valve plate. The CNC horizontal machining of the sealing surface has the advantage of being able to perform ordinary cutting and high efficiency. However, due to the work The inherent gap inside the transmission bearing under the table caused the dimensional deviation during the processing of the workpiece, resulting in unsatisfactory sealing effect during the pressure test after assembly, and the phenomenon of leakage has always existed, which could not meet the customer's use requirements

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