A process method for single-lobe processing and alignment of four-lobe seat ring
A process method and seat ring technology, applied in metal processing equipment, metal processing machinery parts, manufacturing tools, etc., can solve the problem of unavoidable grouping and combination processing of multi-lobed seat rings, increased production difficulty and cost, and failure to achieve ultra-precision processing and other issues, to achieve the effects of easy promotion, saving production costs and cycles, and controlling cumulative errors
Active Publication Date: 2020-04-14
HARBIN ELECTRIC MASCH CO LTD +1
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Problems solved by technology
This scheme is mainly to avoid quality problems caused by accumulated errors as much as possible, but it obviously increases the difficulty and cost of production
In the prior art, "Technical Method for Seat Ring Processing and Alignment of Large Water Turbine" (CN103612082A) mentions a processing and alignment scheme for seat rings, especially for six-petal seat rings, but this scheme is still based on traditional processing schemes The optimization and innovation of multi-lobed seat rings did not avoid the mode of grouping and combining processing of multi-lobed seat rings
At the same time, the final result of this scheme is too dependent on the accuracy of the equipment, failing to achieve the technical effect of ultra-precision machining
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[0029] The implementation of the present invention includes the following process steps: taking the four-petal seat ring of a large hydropower unit as an example to illustrate the process of applying the present invention to process and align and ensure technical requirements: the seat ring is designed to be divided into four petals, with a weight of 187t and a height of about It is 3127mm, and the maximum outer diameter is Ф13920mm. After the joint surface is closed, the local gap shall not be greater than 0.15mm, and the depth shall not be greater than 1 / 3 of the width of the contact area. Adopt the present invention to process, process is as follows:
[0030] 1) Put the four 1 / 4 petal seat rings on the marking platform correspondingly, take the horizontal center line A-A of the fixed guide vane as the reference, and level the workpiece to within 0.1mm; take the fixed guide vane inscribed circle Φ1 as the reference Determine the workpiece center O-O; take the center line O-...
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The invention discloses a process method for machining and aligning a single clack of a four-clack socket ring. By means of the technical steps of single-clack inspection, alignment, rough machining,calculation and numerical control compensation, finish machining and accurate measurement, machining and alignment of the single clack of the four-clack socket ring are completed. Meanwhile, the technical effect of ultrahigh-precision machining is achieved by applying precise measurement in cooperation with numerical control compensation, and cannot be achieved by previous large machining. The process method has the beneficial effects of being easy to operate, high in alignment precision and small in accumulative error, guaranteeing the small closed face clearance formed during circling aftermachining and the like, the production period can be shortened, and the machining quality can be improved.
Description
technical field [0001] The invention relates to a process method for processing and assembling a single lobe of a multi-lobed seat ring, in particular to a process method for completing processing and aligning a single lobe of a four-lobed seat ring to realize full-circle combination. Background technique [0002] The seat ring is the basic component of the impact generator. In addition to bearing the pressure, it also bears the concrete weight of the entire unit and unit section, requiring sufficient strength and rigidity. At the same time, as one of the key benchmarks in the installation of the generator set, the seat ring needs to have sufficient processing and assembly accuracy. [0003] Generally, there are three structural methods for the seat ring according to the size and split situation, namely: for small units, the overall non-split design structure is adopted, and the maximum size of the seat ring is generally below 5 meters; for medium-sized units, the split desi...
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IPC IPC(8): B23C3/00B23C9/00B23Q17/24
Inventor 智连玮张向阳刘向海何昊姜国华雒军红李鑫
Owner HARBIN ELECTRIC MASCH CO LTD