Adjusting valve multistage maze type core package manufacturing method and special milling and welding clamp for method
A manufacturing method and multi-level technology, applied in the direction of manufacturing tools, welding equipment, auxiliary welding equipment, etc., can solve the problems of difficult control of fluidity, leakage of sheet gaps, easy blockage of labyrinth channels, etc., to achieve reduced deformation and reliable connection , to ensure the effect of matching
Active Publication Date: 2013-11-27
NANTONG POWER STATION VALVE
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Problems solved by technology
However, due to the thick adhesive, the gap between the sheets is often increased to cause leakage, the fluidity is difficult to control and it is easy to block the labyrinth channel
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[0026] The manufacturing method steps of the regulating valve multi-level labyrinth core bag among the present invention comprise:
[0027] The first step: making the blank, selecting the steel material for cutting according to the size of the core package, and forging it into a cylindrical blank of appropriate size.
[0028] The second step: rough turning, drilling the center hole, turning the outer circle, turning the center hole and turning the end face of the cylindrical blank, and milling several welding grooves evenly distributed in the circumferential direction and extending axially on the outer surface of the cylindrical blank , the number of welding slots is adjusted with the outer diameter of the labyrinth core package.
[0029] The third step: heat treatment, quenching and tempering the cylindrical blank.
[0030] The fourth step: wire cutting, wire cutting the heat-treated cylindrical blank into several discs.
[0031] Step 5: Mill the labyrinth groove, and use t...
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The invention relates to an adjusting valve multistage maze type core package manufacturing method and a special milling and welding clamp for the method. The method includes: manufacturing blanks, rough turning, thermal treatment, linear cutting, milling maze grooves, nitriding, plane grinding, welding and fine turning. During rough turning, a plurality of welding grooves which extend axially are milled in the outer surface of the cylindrical blanks, the cylindrical blanks are cut into a plurality of discs through linear cutting, the maze groove milling special clamp is used to clamp the discs, and the maze grooves are machined in the discs for 2-3 times on a numerical control milling machine; the special welding tool is used to clamp the discs, welding is performed on the welding grooves, and sequential welding of opposite groove openings is performed. Traditional adhesives blocking the made grooves is avoided, the multilayer discs of the core package are formed by cutting the same cylindrical blank, the discs are formed by milling several times during maze groove machining, deformation during machining is reduced, fittingness of the discs after the discs are stacked is guaranteed, leakage caused by gaps among the discs is avoided, and multi-welding-channel connection is more reliable.
Description
technical field [0001] The invention relates to a method for manufacturing a multi-level labyrinth core package for a regulating valve, and also relates to a special milling jig and a welding jig for realizing the manufacturing method. Background technique [0002] The power station control valves used for thermal power steam units are mainly distributed in the three major systems of boilers, steam turbines and auxiliary machines. The thermal control technology of thermal power plants generally takes the safe and economical operation of the unit as the main goal, and various regulating valves become special auxiliary equipment for safe operation. The higher the parameters of the unit, the greater the capacity of the unit, and the higher the performance requirements for the control valve of the power station, such as sealing performance, regulation characteristics, and reliability. [0003] This kind of regulating valve has the characteristics of high pressure, high tempera...
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IPC IPC(8): B23P15/00B23Q9/00B23Q3/00B23K37/053
Inventor 张建华刘培兵尤广泉
Owner NANTONG POWER STATION VALVE