Machining device for precise micropore flow calibration
A flow calibration and processing device technology, applied in metal processing equipment, manufacturing tools, abrasives, etc., can solve the problems of low processing efficiency, low quality of micro-hole processing, low qualification rate, etc., to achieve simple structure and improve processing quality. And the effect of processing efficiency and low manufacturing cost
Active Publication Date: 2020-10-02
NANJING CHENGUANG GRP
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Problems solved by technology
[0003] At present, the production of nozzles and throttle holes of servo mechanism nozzle parts adopts the process plan of manual drawing and pairing after drilling or reaming on precision lathes. The processing efficiency is low, the processing quality of micro holes is not high, and the manual workload is large. , heavy labor load
In addition, the manually drawn and paired nozzles can easily cause the jet flow to exceed the standard or the flow matching to be out of tolerance, and the pass rate is low, which has become a bottleneck process that affects the quality of development and production.
Method used
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[0029] Nozzles and orifices are small precision rotary parts. In addition to the characteristics of high precision and small surface roughness, the nozzle body and orifices are required to have strict throttling due to the symmetrical structure of the preamplifier of the servo valve. The flow characteristics, hydrodynamic characteristics and symmetry, the diameter and length of the small holes are determined according to the requirements of the flow test. The main technical requirements are: the outer diameter of the nozzle is usually prepared with the hole of the servo valve housing, and the interference is generally 4-6μm. The cylindricity is 1μm, and the surface roughness value is Ra0.1μm; the coaxiality between the orifice and the outer cone surface of the outer circle is The perpendicularity of the end to the throttle hole is 3 μm, the surface roughness of the throttle hole is Ra0.4 μm, the outlet edge should be kept sharp, the throttling characteristics should meet the t...
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The invention discloses a machining device for precise micropore flow calibration. The machining device comprises a base, pins, a clamping seat, an upper clamping plate, a pressing plate, locating pins, an upper sealing gasket, a sealing gasket, a sealing ring, an upper connecting bolt and a lower connecting bolt. A micropore flow calibration device is directly mounted on a working table support connected with the micropore flow calibration device. During part machining, the end, with the conical surface, of a part or the outlet end needing to maintain the sharp end is inserted into an inner pore of the sealing gasket with the sealing effect; the pressing plate and the sealing ring are mounted, force is applied to the upper end face of the flow calibration device, then clamping of the partcan be completed, and the requirements for product machining are met. The machining device for precise micropore flow calibration is stable in locating and good in sealing performance, the part is mounted conveniently, and the machining quality and the machining efficiency of precision micropores can be effectively improved.
Description
technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a processing device for precise microhole flow calibration. Background technique [0002] The servo valve is the key component of the servo mechanism, and the nozzle and the orifice are important parts of the double nozzle baffle valve in the pre-stage of the servo valve. The nozzles in the double-nozzle baffle valve have strict symmetry requirements on the fluid characteristics. It is necessary to measure the differential pressure and flow rate through batches of nozzles, and then pair them according to the measurement data, that is, select two nozzles with good symmetry for pairing. [0003] At present, the production of nozzles and throttle holes of servo mechanism nozzle parts adopts the process plan of manual drawing and pairing after drilling or reaming on precision lathes. The processing efficiency is low, the processing quality of micro holes is ...
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Login to View More IPC IPC(8): B24C1/00B24C3/00
CPCB24C1/00B24C3/00
Inventor 王雪梅朱夏林
Owner NANJING CHENGUANG GRP