CN101224532A - Power station great mirror board and mirror face hkusm machining technique - Google Patents

Abstract

The invention discloses a hauk energy processing technology used for the large mirror plate surface of a power plant, comprising the steps of: (1) a suitable cutter is adopted to fabricate a mirror plate which complies with the basic dimension and the geometrical tolerance required by the drawing and the surface roughness of which reaches 2.3-2.8 micro meters; (2) the cutting parameter is adjusted, the processing linear speed of the hauk energy cutter is adjusted to 39m/min and the feeding speed is adjusted to 0.3mm/r; (3) the surface of the mirror plate which is processed and formed in the step (1) is processed by the hauk energy cutter. The invention has the advantages of greatly improving the processing precision of the metal surface, the surface roughness of the workpiece reaching 0.07-0.10 micro meters, reducing the investment of process equipments, reducing the manufacturing cost, shortening the processing and manufacturing period, improving the working efficiency, reducing the environmental pollution, being suitable for processing the surface of the external round and the mainshaft mirror surface, etc. of the parts such as the large mirror plate surface of the power plant, a mainshaft, etc.

Description

Power station great mirror board and mirror face hkusm machining technique

Technical field

The present invention relates to a kind of metal surface processing technology, particularly relate to a kind of power station great mirror board and mirror face hkusm machining technique.

Technical background

The requirement of the roughness of piece surface is the problem that engineers and technicians will consider emphatically in doing the utilization of processing scheme and equipment all the time in the machine-building, how to meet design requirement, reduce personnel labor, enhance productivity, reducing environmental pollution, is engineers and technicians' probing direction.When the machined part surface roughness value was low, method commonly used was to adopt grinding on the engineering, as workpiece size is big, structure is special or when not possessing grinding condition, usually adopt attrition process to reach the lower requirement of roughness value.Multiple unfavorable factors such as but traditional grinding technics exists the process-cycle longer, and auxiliary consumption is big, and worker's work production intensity is big, and environmental pollution is serious, and the machine tool deterioration is bigger.

Summary of the invention

Of the present inventionly be to overcome the deficiencies in the prior art, a kind of power station great mirror board and mirror face hkusm machining technique is provided, reduce the input of technological equipment, reduce manufacturing cost, shorten the processing and manufacturing cycle, increase work efficiency, reduce environmental pollution, reduce the generation of occupational hazards.

The objective of the invention is to be achieved through the following technical solutions: power station great mirror board and mirror face hkusm machining technique, it may further comprise the steps:

(1) adopt suitable cutter to produce to meet basic size that drawing requires and form and position tolerance and surface roughness to reach the runner plate of 2.3 μ m～2.8 μ m;

(2) adjust cutting parameter: the linear velocity of person of outstanding talent's gram energy cutter processing is adjusted into 39m/min, and feeding speed is adjusted into 0.3mm/r;

(3) use person of outstanding talent's gram to implement processing to the runner plate minute surface that step (1) is processed to form by cutter.

The invention has the beneficial effects as follows the machining accuracy that has significantly improved the metal surface, the workpiece surface roughness value can reach 0.07 μ m～0.10 μ m, reduced the input of technological equipment, reduced manufacturing cost, shortened the processing and manufacturing cycle, improve operating efficiency, reduced environmental pollution, be applicable to the processing of the outer round surface, main shaft minute surface etc. of parts such as the large-scale runner plate minute surface in power station, main shaft.

The specific embodiment

Further describe technical scheme of the present invention below in conjunction with embodiment, present embodiment is selected from the processing that stone that my company accepts is carried power station 2# runner plate.Stone carries that power station runner plate size is bigger, and outside diameter reaches φ 2780, the more representative and challenge of the manufacturing technology of its runner plate minute surface.Now carrying power station 1#, the 2# runner plate processing different process means that adopts with stone contrasts and illustrates that the person of outstanding talent restrains energy processing technology and beneficial effect thereof.Stone is carried power station 1# runner plate minute surface and is adopted traditional abrasive disk to grind manufacturing, and stone is carried electric aunt 2# runner plate minute surface employing person of outstanding talent gram can metal surface process technology manufacturing.

Stone is carried power station 1#, 2# runner plate process technology requires:

Runner plate material: forge 45#, workpiece overall dimensions φ 2780/ φ 1760 * 160mm

The modified rear surface of workpiece hardness reaches 220HB～230HB

Designing requirement: mirror plane degree-0.03mm, both ends of the surface depth of parallelism 0.03mm, minute surface roughness value require 0.2 μ m, the about 510mm of runner plate machined surface width.

Stone is put forward power station 1# runner plate mirror finish and adopted traditional abrasive disk grinding technics, and its technological process is: (1) is adopted and is agree receive KT315 cutter fine finishining runner plate to dimensional accuracy and Geometrical Tolerance Principle, and the surface roughness Ra value reaches 3.2～6.3 μ m; (2) adopt 150# diamond dust to carry out hand lapping about 72 hours, thoroughly remove the cutter flower that Vehicle Processing produces (must guarantee in the process of lapping that surfaces of mirror plate do not pulled, process again, grind) otherwise need remove the face of pulling by impurity with abrasive disk; (3) adopt 180# diamond dust to carry out half smooth grinding about 24 hours (requiring the same workpiece to be pulled) with slightly grinding with abrasive disk; (4) adopt 240# diamond dust to carry out lappingout about 16 hours (requiring the same) with abrasive disk; (5) surfaces of mirror plate uses W7 antiscuffing paste+kerosene to polish about 3 hours under lathe maximum speed (40r/min), the about 300m/min of linear velocity; (6) quality inspection metering portion carries out the minute surface detection, and its surface roughness Ra value reaches 0.16～0.20 μ m, meets design requirement.

Stone is carried power station 1# runner plate in process, because of the minute surface size bigger, abrasive disk must can cover its width, thereby the abrasive disk that manufactures and designs is heavier, not serious slightly the pulling of degree for several times appearred in surfaces of mirror plate in process of lapping (processing is pulled and is adopted car to repair abrasive disk, reground mode), the whole process-cycle is lasted 21 days, wherein grinds about 14 days of used time.

The auxilliary operating position that disappears:

About 20 bags of the diamond dust of various label granularities is worth 1300 yuan approximately;

Abrasive media kerosene consumes about 2.5 oil drums, is worth 1850 yuan approximately;

Abrasive pastes 30 pipes are worth 750 yuan approximately;

Use 20 bags in butter during the lathe protection, be worth 200 yuan approximately;

Use 5 barrels of N46 guide rail lubricating oil, be worth 4200 yuan approximately;

3 of grinding, feltless polishing bobs are worth 410 yuan approximately;

Other miscellaneous (machine oil, Sha Bu etc.) are worth 800 yuan approximately;

Auxilliary disappearing used about 9510 yuan of total.

Owing to used kerosene, its strong osmosis has badly influenced the lubricating system of lathe, causes machine tool lubrication oil diluted, and the lathe oil pump can't start, and must change the lubricating oil of whole machine tool for this reason.

The basic charge aspect that lathe uses: by the market price, the processing price of C534 vertical lathe is about: 110 yuan/hour;

Converse runner plate Vehicle Processing usage charges: 110 * 16 hours * 7 days=12320 yuan;

Converse the runner plate lathe and grind usage charges: 110 * 16 hours * 14 days=24640 yuan.

The configuration aspect of power resource: runner plate adopts the operation of the common collective of three people in process of lapping, and 1 people shakes the use of sand and control kerosene, and 1 people rotates abrasive disk and makes its rotation, and whether 1 people controls lathe and observe the workpiece abradant surface and can be pulled by accident.

The corrective maintenance aspect: runner plate is in process of lapping, because of a large amount of kerosene that use, all be subjected to the pollution of kerosene smell to the production operation environment that makes whole workshop, the operator need be with mouth mask just can carry out operation, the a large amount of waste materials (diamond dust) that produce in the process can't be disposed, the part waste material is along with kerosene penetrates into the lubricating system of lathe, and there is great hidden danger in safe, the normal use of lathe.

In view of traditional grinding technics process-cycle longer, auxiliary consumption greatly, worker's work production intensity is big, and environmental pollution is serious, multiple unfavorable factors such as the machine tool deterioration is bigger determine that utilization person of outstanding talent gram can the metal surface process technology produce the minute surface that stone is carried power station 2# runner plate.

Stone is put forward power station 2# runner plate processing typical process flow: at first adopt suitable Switzerland STELLRAM import cutter to produce and meet basic size and the form and position tolerance that drawing requires, its surface roughness Ra value reaches 2.5 μ m, the experience of person of outstanding talent's gram energy on probation metal surface process equipment during according to technological experiment, electric current and lubricating oil that equipment is used have carried out parameter adjustment again, simultaneously by the suitable cutting parameter of numerical control operating personnel adjustment: the linear velocity of person of outstanding talent's gram energy cutter processing is adjusted into: 39m/min, feeding speed are 0.3mm/r; Because process tool uses rationally, technology is made adequate preparation, adopt person of outstanding talent's gram energy metal surface process technology, stone is carried power station 2# runner plate and has only just been finished the manufacturing operation that is finish-machined to the runner plate minute surface from size with two day time, its surfaces of mirror plate roughness detects through quality inspection metering portion roughmeter, and its Ra value is at 0.07～0.10/ μ m.Reach fully and meet design requirement.

In sum, surface of the work is by after the rolling and processing, and the workpiece surface roughness value can reach 0.35 μ m when doing the technology experiment, can not meet design requirement when the runner plate mirror finish; During the process program that adopt to grind, the workpiece surface roughness value can reach 0.16 μ m, adopts person of outstanding talent's gram can the metal surface process technology, and the workpiece surface roughness value has then reached 0.07 μ m, is much higher than designing requirement.Therefore, power station great mirror board and mirror face hkusm machining technique provided by the invention, thoroughly substituted the grinding technics method that falls behind, reduced the input of technological equipments such as abrasive disk, operating efficiency improves significantly, in runner plate manufacturing process, every of processing and manufacturing cycle can shorten about more than 10 days, economic benefit is very considerable, reduce every about 30,000 yuan of manufacturing costs, ensured that also device security moves effectively, greatly reduced environmental pollution, reduce the generation of occupational hazards, the machining accuracy of workpiece has had reliable assurance simultaneously.

Claims (1)

1. power station great mirror board and mirror face hkusm machining technique is characterized in that it may further comprise the steps:

(1) adopt suitable cutter to produce to meet basic size that drawing requires and form and position tolerance and surface roughness to reach the runner plate of 2.3 μ m～2.8 μ m;

(2) adjust cutting parameter: the linear velocity of person of outstanding talent's gram energy cutter processing is adjusted into 39m/min, and feeding speed is adjusted into 0.3mm/r;

(3) use person of outstanding talent's gram to implement processing to the runner plate minute surface that step (1) is processed to form by cutter.