Bonnet support processing method and clamp and processing equipment for bonnet support

Abstract

The invention discloses a bonnet support processing method and clamp and processing equipment for a bonnet support. The bonnet support processing method includes fixing a bonnet support through the special clamp to enable the central line of the bonnet support to be coaxial with the processing equipment; cutting a flange plane and an end face of a valve rod nut through the processing equipment; changing a cutter, rough-boring or fine-boring a valve rod nut hole, assembling a seal seat and a gland box; changing a cutter to enable the cutter to be coaxial with the processing equipment, rotating a rotation disc at 180 degrees, and finish-milling a thread of the valve rod nut; changing a cutter to enable the cutter to be coaxial with the processing equipment, rotating the rotation disc at 180 degrees, and drilling a flange hole; rotating the rotation disc at 90 degrees, and drilling an eyelet bolt hole and a lubrication hole of the valve rod nut on the support; changing a cutter, rotating the rotation disc at 90 degrees, scraping reversely and facing the back end face of the flange hole; and after finishing processing the back end face of the flange hole, disassembling the bonnet support. By the bonnet support processing method, processing on components can be finished through being clamped only once, and product processing accuracy and quality are improved.

Description

technical field [0001] The invention relates to the field of valve processing, in particular to a processing method for a valve cover bracket, a fixture for processing a valve cover bracket and processing equipment. Background technique [0002] The bonnet bracket is the main core part of the valve, see figure 1 , figure 2 and image 3 , the bonnet bracket includes a bracket and a bonnet, the bracket and the bonnet are integral or split, and the bonnet bracket shown in the figure is integral. It can be seen from the figure that the bracket is provided with a stem nut hole, a joint bolt hole, and a valve stem nut lubricating screw hole, and the valve cover is provided with a flange, an upper sealing seat, and a stuffing box. Several flange holes are provided. The bonnet bracket has high requirements on the coaxiality of the shaft system of the valve stem, and high requirements on the verticality of the shaft system of the valve stem and the flange surface, so as to ensur...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, vertical lathes, horizontal lathes and drilling machines are usually used to process valve bonnet brackets. Due to the limitation of processing equipment, large-diameter valves can only use split bonnet brackets. During the processing process, multiple clamping is required to complete the entire process. If the row position tolerance does not meet the requirements, the opening and closing torque of the valve and the force on the sealing surface will be uneven, the sealing effect will be poor, and the stuffing box will be easily damaged, resulting in unstable product quality and high processing costs.

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