CN103203490B - Processing method of five-fork blade-root moving blades with own shrouds - Google Patents
Processing method of five-fork blade-root moving blades with own shrouds Download PDFInfo
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- CN103203490B CN103203490B CN201210588540.7A CN201210588540A CN103203490B CN 103203490 B CN103203490 B CN 103203490B CN 201210588540 A CN201210588540 A CN 201210588540A CN 103203490 B CN103203490 B CN 103203490B
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Abstract
The invention discloses a processing method of five-fork blade-root moving blades with own shrouds, belonging to the technical field of blade processing. The processing method comprises: step 1, clamping blades, step 2, roughing, step 3, semi-refining, step 4, refining, step 5, positioning a steam-out side of a shoulder of the blade root, a steam-out side of a shroud and a back radial surface of the blade root, selecting a cutter with cutting edges matching with five-fork blade root lines, with a rotating speed being 25-30 r/min, a feeding speed being 12.5 mm/min, a feed amount being 0.5-0.8 mm, and performing fine milling for the five-fork blade root lines of the blade along a linear direction. According characteristics of the five-fork blade-root moving blades with own shrouds, positioning reference surface during processing is unified, a one-time clamping is used to complete processing of each part, thereby effectively preventing accumulative errors, increasing processing precision, optimizing integration processing, shortening processing periods of products, reducing required amount of machine tool, and reducing production cost.
Description
Technical field
The present invention relates to a kind of turbine Blade Machining method, especially a kind of processing method of five fork blade root self-crown moving vanes, belongs to turbine Blade Machining technical field.
Background technology
At five fork blade root self-crown moving vane complex structures, its blade root plays an important role in steam-turbine unit, therefore to blade itself, particularly blade-root molded line fine finishining required precision is high, existing process program is: basic common plain milling and the sleeping milling machine tool of adopting of datum level processing processed, and a minute order is processed each procedure, be minute order processing of each origin reference location face, each datum level needs an operation to complete, the shortcoming of minute order processing is easily to produce accumulated error, multiple clamping accumulated error and processing accumulated error, the uniformity that machine tool processes neither be fine, efficiency and dimensional accuracy are far not by far up to the mark, inevitably larger on the impact of product quality thus, and the uniformity of product is poor, also greatly reduce production efficiency simultaneously, increase the product process-cycle, increased the need quantity of lathe, increased production cost.
Summary of the invention
Goal of the invention of the present invention is: for the problem of above-mentioned existence, a kind of processing method of five fork blade root self-crown moving vanes is provided, can be according to the feature of five fork blade root self-crown moving vanes in this technique, positioning reference plane in unified manufacturing procedure, adopts disposable clamping to complete the processing of each portion, can effectively avoid accumulated error, improve machining accuracy, and optimize integrated processing, shorten the product process-cycle, the need quantity that reduces lathe, reduces production costs.
The technical solution used in the present invention is as follows:
The processing method of five fork blade root self-crown moving vanes of the present invention, comprises the following steps:
Step 1, blade blank is installed on lathe, adopts three thimbles to carry out clamping to the positioning datum of blade, and set up clamp mechanism in blade root both sides, below integral shroud, set up float support;
Step 2, roughing: the processing of blade root and integral shroud is selected and is provided with the milling cutter that cutting angle radius is the blade of 0.4mm, its rotating speed is 2000-2200r/min, feed speed is 3000-3500mm/min, and cutting depth requires as 0.8-1mm, cutting width: 12-15mm; Wherein the processing of steam passage molded line is selected and is provided with the nose of an ox cutter that cutting angle radius is the circular knife of 5mm, its rotating speed is 2200-2500r/min, and feed speed is 2500-3000 mm/min, and cutting depth is 1-2 mm, cutting width: 6-8mm;
Step 3, semifinishing: selecting and being provided with bull nose is that the blade milling cutter of the corrugated blade of 1.6mm is processed each portion, and its rotating speed is 3200-3500r/min, and feed speed is 3500-4000mm/min, and cutting depth is 0.6-0.8mm; Cutting width: 10-12mm;
Step 4, fine finishining: first select and be provided with each portion of blade milling cutter fine finishining that bull nose is the circular knife of 5mm, its rotating speed is 2800-3200r/min, and feed speed is 2500-3000 mm/min, and cutting depth is 0.3-0.4mm, and cutting width is 0.3-0.4mm;
Next is selected and is provided with the dish milling cutter that bull nose is the corrugated blade of 1.6mm, to blade root radially face carry out fine finishining, its rotating speed is 1200-1600r/min, feed speed is 800-1000 mm/min, cutting depth is 0.1-0.2mm, cutting width is 0.3-0.4mm;
Finally select and be provided with the rose cutter that round radius is the rose cutter blade of 6mm, to blade steam passage, portion carries out fine finishining, and its rotating speed is 3000-3500r/min, and feed speed is 4500-5500mm/min, cutting depth is 0.3-0.4mm, and cutting width is 0.5-0.6mm;
Step 5, with blade root shoulder steam output side, integral shroud steam output side and blade root back of the body sagittal plane location, the cutter of selecting cutting edge and five fork blade-root molded lines to match, its rotating speed is 25-30r/min, feed speed is 12.5mm/min, the depth of cut: 0.5-0.8mm, carries out finish-milling processing along rectilinear direction to five fork blade-root molded lines of blade.
Compared with prior art, fixture in step 1 can fix blade blank, thereby blade blank can be driven under the effect of lathe, guarantee that follow-up processing is successive, simultaneously, each position of disposable clamping integrated machining blade, reduces the cumulative bad error that multiple clamping is brought, and has guaranteed machining accuracy; The present invention is in process, when processing blade root back of the body sagittal plane, integral shroud back of the body camber line and blade root, integral shroud both sides, reason due to installation way and machine tooling mode, there is ceaselessly vibration in blade, with damaging, quickening, machined surface presentation quality are poor, dimensional accuracy cannot guarantee to cause cutter in milling; Therefore in order to address the above problem, the present invention increases clamp mechanism in blade root both sides, at integral shroud downside, increase float support, the clamping order of unified operation work, clamping strength, optimizer milling mode, bite.Step 2 is roughing, because the material that in roughing process, product is removed is many, therefore in working angles, the suffered cutting stress of product is relatively large, thereby must consider that reducing machining stress is out of shape, therefore while first blade root and integral shroud being carried out to machining respectively, need to select roughing feed milling cutter, this milling cutter can be used for high-speed cutting, bite is little, fast feed mode, most of heat in metal cutting is taken away by iron pin, be applicable to the processing of die forging blank, in process, need to its carry out air cooling but or mist of oil cooling, and while selecting this milling cutter, the blade that the cutting angle radius of simultaneously selecting installation on it is 0.4mm, also the radius that is blade center to the limit portion of blade of milling cutter is 0.4mm, controlling effectively can the range of work, avoid cutting output excessive, cause the deformable blade in process, if blade is too small, cannot meet the requirement of cutting output, secondly, in the process of processing, needing the strict rotating speed of controlling milling cutter is 2000-2200r/min, if rotating speed is excessive, in the blade process on milling cutter, easily fractureed, if rotating speed is excessively slow, make its milling cutter to the cutting of blade by influenced, may exist and beat, there is the not processed situation of part, affect processing effect, need strictly to control milling cutter feed speed is 3000-3500mm/min simultaneously, if feed speed is too fast, the reaction force that blade bears in working angles is excessive, affected the life-span of blade, if feed speed is slower, the effective cutting output in the unit interval is less, has had a strong impact on production efficiency, therefore need to control its feed speed, also needing in addition to control cutting depth is 0.8-1mm, cutting width is 12-15mm, if cutting depth is dark or width is very fast, make to need the amount of cutting larger, cutter cannot bear larger reaction on the one hand, uses for a long time simultaneously, can make its life-span reduce, on the other hand, affect the precision of blade surface, can not meet the demands, if the degree of depth is more shallow or width is narrower, the effective cutting output in the unit interval is less, need to expend a large amount of time just can complete, and has a strong impact on its production efficiency.In addition according to blade steam passage part feature, need to select nose of an ox cutter to process it, select suitable instrument to process blade, unnecessary interference or the damage that can effectively avoid other position of cutter to cause blade steam passage portion, circular knife on this nose of an ox cutter, its round radius is 5mm, can effectively control effective working (finishing) area of this nose of an ox cutter, thereby avoid can processing capacity excessive, blade steam passage is partly caused compared with large active force and makes it cross earth deformation, the rotating speed that simultaneously needs to control nose of an ox cutter is 2200-2500r/min, adopt the feed of spiral cutting mode, also be that nose of an ox cutter is when constantly rotating, constantly move, spatially formed spiral-shaped path, feed speed is 2500-3000mm/min, cutting depth is 1-2mm, cutting width is 10-12mm, and it is cooling to adopt cutting fluid to carry out, need to accurately control its feed velocity, the width of cutting depth and cutting can be controlled the processing capacity to blade effectively, guarantee enough cutting outputs and surplus, can effectively avoid blade that larger distortion occurs in process simultaneously, need in addition the rotating speed of controlling nose of an ox cutter at 2500-3000mm/min, avoid that nose of an ox swivel speed is too fast very easily to be fractureed in process, on the one hand make the life-span of nose of an ox cutter more permanent, in addition on the one hand, avoid the too fast damage that the blade root of blade and integral shroud are caused of nose of an ox swivel speed, by controlling rough machined cutter, cutter sizes, tool speed, tool feeding speed, the size of cutting, can control the cutting output of blade in the process of locating processing effectively, guarantees its surplus, avoids distortion excessive in roughing process.Through after roughing, blade blank is basic forming, middle steam passage partly becomes very weak, must consider to reduce process distortion, therefore in semifinishing process, the distortion of steam passage part in the middle of need to reducing, so need to carry out whole half finish-milling processing to five fork blade root self-crown moving vanes, adopt blade milling cutter to carry out machining, wherein on blade milling cutter, corrugated blade is set, and the round radius of this corrugated blade is 1.6mm, roughing reduces its working (finishing) area relatively, thereby improved machining accuracy, reduce the active force of working angles to blade, excessive for fear of its distortion, the rotating speed of controlling blade milling cutter is 3200-3500r/min, feed speed is 3500-4000mm/min, cutting depth is 0.6-0.8mm, cutting width is 10-12mm, with respect to roughing, reduced the width of its depth of cut and cutting, reduced cutting output, reduce the processing capacity to blade, thereby improve its precision, reduce the deflection to the integral shroud of blade and blade root, in like manner, in the process of this half finish-milling processing, pay particular attention to the machining to steam passage part, avoid cutting output active force excessive or that produce excessive, make steam passage that excessive distortion partly occur, adopt the feed of spiral cutting mode, also by spirality path feed, reduce stressed in process of blade steam passage, avoid the damage to blade steam passage, with respect to existing, cross feed and length feed, the feed of spiral cutting mode can reduce to greatest extent the steam passage of blade is caused to distortion, the mode of wherein crossing feed, can produce one makes a concerted effort, the direction that should make a concerted effort is towards making the diastrophic direction of blade blank, length feed mode, can cause flexural deformation to blade blank equally in addition, need to control the rotating speed of its spiral feed and feed speed simultaneously, cutting depth is also the size of processing capacity, accurately controlled blade milling cutter to the semi-finished processing capacity of blade steam passage, adopt spiral cutting mode, make cutting force be dispersed in each axial direction, because workpiece is thinner, avoided the stressed ambassador of mistake of same direction workpiece working angles to produce shake.Through semifinishing moulding of blade later, need follow-up precision processing, thereby guarantee that its every value reaches requirement, in fine finishining process, need carry out fine finishining first to each portion of blade, this process is mainly subsequent fine processing and lays foundation, for this accurately machined cutting output excessive or too small, thereby affect follow-up accurately machined effect, therefore need the strict size of controlling its milling cutter, milling cutter rotating speed, feed speed, cutting depth and cutting width, if milling cutter is excessive, the precision processing can not meet the demands, if milling cutter is too small, in the unit interval, the amount of processing is less, make inefficiency, therefore selecting bull nose is the corrugated blade of 1.6mm, in like manner, can need to control milling cutter rotating speed is 3200-3500r/min, avoid milling cutter rotating speed excessive, in process, easily forge a knife and rupture, milling cutter rotating speed is too small, processing dynamics does not reach, as mentioned above, the feed speed of selecting milling cutter is 3500-4000mm/min, cutting depth is 0.6-0.8mm, cutting width: 10-12mm, through after first fine finishining, also need the part of blade to carry out fine finishining again, therefore select dish milling cutter to blade root radially face carry out fine finishining, on its dish milling cutter, the corrugated blade that bull nose is 1.6mm is set, assurance dish milling cutter can the range of work, guarantee radially facial cutting output moderate, avoid its distortion excessive, for fear of impaired very fast in blade process, easily fracture etc. problem, avoid blade surface part not processed, needing to control its rotating speed is 1200-1600r/min simultaneously, if feed speed is too fast, need the amount of cutting more simultaneously, blade damage is serious, if feed speed is slower, the inefficiency in the unit interval, had a strong impact on normally carrying out of processing, therefore need controller feed speed between 800-1000mm/min, in order to ensure effectively machined surface and effectively processing capacity, need the controlled working degree of depth and working width thereof in addition, the amount of the cutting in the unit interval is moderate, avoid the wearing and tearing to cutter, also do not lower efficiency, therefore controlling cutting depth is 0.1-0.2mm, and cutting width is 0.3-0.4mm.Due to steam passage in the middle of blade partly become very weak, therefore the deflection that how to reduce process has just become the problem that must consider, the key of whole blade is in middle steam passage part, therefore when fine finishining, need choosing separately to carry out this part, in order to reduce its distortion as far as possible, need on ball head knife slitting milling cutter, select round radius is the circular knife of 6mm, can radius of machining thereby reduce it, make the blade surface precision that processes higher, simultaneously for fear of deforming in process, also needing to control further its rotating speed is 3000-3500r/min, feed speed is 4500-5500mm/min, cutting depth is 0.3-0.4mm, cutting width is 0.5-0.6mm, thereby can partly carry out fine finishining to middle steam passage, thereby can effectively control the middle steam passage part of blade, through roughing-semifinishing-accurately machined process, control step by step the velocity of rotation of cutter, the feed velocity of cutter, the cutting depth of cutter, the data of cutting width, thereby control step by step the distortion of the middle steam passage part of blade.After the roughing-semifinishing of blade-fine finishining is processed, also need separately five fork blade root self-crown moving vanes to be processed, requiring of the special processing for five fork blade-root molded lines on blade is high, in the large situation of difficulty, need again to this blade, position, face to be processed is exposed to upper surface, therefore select blade root shoulder steam output side, integral shroud steam output side and blade root back of the body sagittal plane are as positioning datum, because above-mentioned part is through disposable machining, its for datum level identical, can there is not accumulated error, thereby while making above-mentioned part as datum level, can guarantee its required precision, thereby meet the processing request to blade five fork blade-root molded lines, therefore the above-mentioned location particular importance that just seems, behind location, adopt special stage property, the structure matching of the cutting edge of this stage property and five fork blade-root molded lines, now only needing this stage property of control on blade, to prolong five fork blade-root molded lines processes along straight line, for the five fork blade-root molded lines that guarantee to process reach requirement, need to control its rotating speed, feed speed and the depth of cut, rotating speed is 25-30r/min, feed speed is 12.5mm/min, the depth of cut is 0.5-0.8mm, when rotating speed too fast, feed speed is too fast, when the depth of cut is excessive, the cutting output that cutter synchronization processes is larger, therefore more serious to tool damage, because cutter is expensive, therefore cause production cost to increase greatly, if rotating speed is excessively slow, feed speed crosses slow and the depth of cut is too small, production efficiency will be affected, and make equally production efficiency reduce, therefore particularly important to the control of this cutter, can effectively avoid the distortion of five fork blade roots.The processing method of five fork blade root self-crown moving vanes of the present invention, can be according to the feature of five fork blade root self-crown moving vanes, positioning reference plane in unified manufacturing procedure, adopt disposable clamping to complete the processing of each portion, can effectively avoid accumulated error, improve machining accuracy, and optimize integrated processing, shorten the product process-cycle, reduce the need quantity of lathe, reduce production costs.
The processing method of five fork blade root self-crown moving vanes of the present invention, in step 2, the milling cutter processing to blade root and integral shroud, its rotating speed is 2000r/min, and feed speed is 3500mm/min, and cutting depth requires as 0.8mm, and cutting width is 15mm; Nose of an ox cutter to steam passage profile processing, its rotating speed is 2500r/min, and feed speed is 3000 mm/min, and cutting depth is 1 mm, and cutting width is 7mm;
In step 3, to the semi-finished blade milling cutter of each, its rotating speed is 3200r/min, and feed speed is 3500mm/min, and cutting depth is 0.6mm; Cutting width is 12mm;
In step 4, each portion is carried out to accurately machined blade milling cutter, its rotating speed is 3200r/min, and feed speed is 2500mm/min, and cutting depth is 0.3mm, and cutting width is 0.3mm;
To blade root radially face carry out accurately machined dish milling cutter, its rotating speed is 1600r/min, feed speed is 800mm/min, cutting depth is 0.2mm, cutting width is 0.3mm;
To blade steam passage, portion carries out accurately machined rose cutter, and its rotating speed is 3000r/min, and feed speed is 4500mm/min, and cutting depth is 0.3mm, and cutting width is 0.6mm;
In step 5, the cutter that five fork blade-root molded lines are carried out to finish-milling processing, its rotating speed is 28r/min, and feed speed is 12.5mm/min, and bite is 0.6mm.
Compared with prior art, for fear of blade, in process, deform, avoid accumulated error to pile up on blade simultaneously, therefore by disposable clamping, and the every desired value that affects deformable blade in strict controlled working process, comprise milling cutter size, rotating speed, feed speed, cutting depth and cutting width etc., make disposablely in process successively blade to be carried out to machining, both guaranteed that its cutting output avoided deformable blade, guaranteed again its machining accuracy and production efficiency.Processing for this five fork blades root self-crown moving vane, last fine finishining for five fork blade-root molded lines seems particularly important, wherein pass through in above-mentioned roughing-semifinishing-fine finishining process, automatically the five fork blade-root molded lines that form, but the precision of this five forks blade-root molded line does not reach requirement, therefore need to align especially and carry out finish-milling processing, feed speed in this process is with regard to particular importance, the present invention strictly controls its feed speed, its rotating speed is 28r/min, feed speed is 12.5mm/min, bite is 0.6mm, while avoiding feed speed too fast, tool wear is very fast, cost is increased, production precision does not simultaneously reach requirement, also effectively avoid feed speed to cross when slow, effective cutting output of cutter is less, make production efficiency low, can not meet Production requirement.
In sum, owing to having adopted technique scheme, the invention has the beneficial effects as follows:
1, the processing method of five fork blade root self-crown moving vanes of the present invention, by disposable clamping, all sites roughing by product except blade-root molded line completes; By high speed, stand the integrated fine finishining of carrying on the back camber line in datum level and integral shroud that added; The uniformity of product is reached more than 95%, and presentation quality improves more than 50% than conventional machining mode;
2, the processing method of five fork blade root self-crown moving vanes of the present invention, according to the feature of five fork blade root self-crown moving vanes, positioning reference plane in unified manufacturing procedure, adopt disposable clamping to complete the processing of each portion, can effectively avoid accumulated error, improve machining accuracy, and optimize integrated processing, shorten the product process-cycle, reduce the need quantity of lathe, reduce production costs.
3, the processing method of five fork blade root self-crown moving vanes of the present invention, datum level does not need multiple conversions, has reduced the error that benchmark conversion causes, and the product benchmark face factor of merit is reached more than 80%;
4, the processing method of five fork blade root self-crown moving vanes of the present invention, the use amount of lathe reduces 50%; Reduce clamping times and the transhipment of product, shortened the production cycle 30% of product; Fixture, measurer, cutter and accessory quantity also can reduce greatly, reduce supplementary costs 20%;
5,the processing method of five fork blade root self-crown moving vanes of the present invention, produces five fork blade-root molded lines and adopts special-purpose fixture, measurer, profile milling cutter, completes smoothly the fine finishining of five fork blade-root molded lines in customer requirement in the time, and the qualification rate of product is reached more than 98%.
Accompanying drawing explanation
Fig. 1 is the structural representation of five fork blade root self-crown moving vanes in the present invention;
Fig. 2 is the top view of Fig. 1.
Mark in figure: 1-blade, 2-five fork blade roots, 3-integral shroud.
The specific embodiment
Disclosed all features in this description, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this description (comprising any accessory claim, summary), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.That is,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
The processing method of embodiment 1, five fork blade root self-crown moving vanes of the present invention, comprises the following steps:
Wherein step 1, blade blank is installed on lathe, adopt three thimbles to carry out clamping to the positioning datum of blade, and set up clamp mechanism in blade root both sides, below integral shroud, set up float support;
Step 2, roughing: the processing of blade root and integral shroud is selected and is provided with the milling cutter that cutting angle radius is the blade of 0.4mm, and its rotating speed is 2200r/min, and feed speed is 3500mm/min, cutting depth requires as 1mm, cutting width: 12-15mm; Wherein the processing of steam passage molded line is selected and is provided with the nose of an ox cutter that cutting angle radius is the circular knife of 5mm, its rotating speed is 2500r/min, and feed speed is 3000 mm/min, and cutting depth is 2 mm, and cutting width is 8mm;
Step 3, semifinishing: selecting and being provided with bull nose is that the blade milling cutter of the corrugated blade of 1.6mm is processed each portion, and its rotating speed is 3500r/min, and feed speed is 4000mm/min, and cutting depth is 0.8mm; Cutting width is 12mm;
Step 4, fine finishining: first select and be provided with each portion of blade milling cutter fine finishining that bull nose is the circular knife of 5mm, its rotating speed is 3200r/min, and feed speed is 3000 mm/min, and cutting depth is 0.4mm, and cutting width is 0.4mm;
Next is selected and is provided with the dish milling cutter that bull nose is the corrugated blade of 1.6mm, to blade root radially face carry out fine finishining, its rotating speed is 1600r/min, feed speed is 1000 mm/min, cutting depth is 0.2mm, cutting width is 0.4mm;
Finally select and be provided with the rose cutter that round radius is the rose cutter blade of 6mm, to blade steam passage, portion carries out fine finishining, and its rotating speed is 3500r/min, and feed speed is 5500mm/min, and cutting depth is 0.4mm, and cutting width is 0.6mm;
Step 5, with blade root shoulder steam output side, integral shroud steam output side and blade root back of the body sagittal plane location, the cutter of selecting cutting edge and five fork blade-root molded lines to match, its rotating speed is 28r/min, feed speed is 12.5mm/min, and depth of cut 0.6mm carries out finish-milling processing along rectilinear direction to five fork blade-root molded lines of blade.
Embodiment 2
Embodiment 2 is similar to embodiment 1, the various parameters that affect deformable blade in main change and controlled working process.
Step 1, blade blank is installed on lathe, adopts three thimbles to carry out clamping to the positioning datum of blade, and set up clamp mechanism in blade root both sides, below integral shroud, set up float support;
Step 2, roughing: the processing of blade root and integral shroud is selected and is provided with the milling cutter that cutting angle radius is the blade of 0.4mm, its rotating speed is that 2000r/min(can select in 2000-2200r/min), feed speed is that 3000mm/min(can select in 3000-3500mm/min), cutting depth requires can in 0.8-1mm, to select for 0.8mm(), cutting width is can 12mm(can in 12-15mm, select); Wherein the processing of steam passage molded line is selected and is provided with the nose of an ox cutter that cutting angle radius is the circular knife of 5mm, its rotating speed is that 2200r/min(can select in 2200-2500r/min), feed speed is that 2500 mm/min(can select in 2500-3000 mm/min), cutting depth is that 1 mm(can select in 1-2 mm), cutting width 6mm(can select in 6-8mm);
Step 3, semifinishing: selecting and being provided with bull nose is that the blade milling cutter of the corrugated blade of 1.6mm is processed each portion, its rotating speed is that 3200r/min(can select in 3200-3500r/min), feed speed is that 3500mm/min(can select in 3500-4000mm/min), cutting depth is that 0.6mm(can select in 0.6-0.8mm); Cutting width is that 10mm(can select in 10-12mm);
Step 4, fine finishining: first select each portion of blade milling cutter fine finishining that bull nose is the circular knife of 5mm that is provided with, its rotating speed is that 2800r/min(can select in 2800-3200r/min), feed speed is that 2500mm/min(can select in 2500-3000 mm/min), cutting depth is that 0.3mm(can select in 0.3-0.4mm), cutting width is that 0.3mm(can select in 0.3-0.4mm);
Next is selected and is provided with the dish milling cutter that bull nose is the corrugated blade of 1.6mm, to blade root radially face carry out fine finishining, its rotating speed is that 1200r/min(can select in 1200-1600r/min), feed speed is that 800mm/min(can select in 800-1000 mm/min), cutting depth is that 0.1mm(can select in 0.1-0.2mm), cutting width is that 0.3mm(can select in 0.3-0.4mm);
Finally select and be provided with the rose cutter that round radius is the rose cutter blade of 6mm, to blade steam passage, portion carries out fine finishining, its rotating speed is that 3000r/min(can select in 3000-3500r/min), feed speed is that 4500mm/min(can select in 4500-5500mm/min), cutting depth is that 0.3mm(can select in 0.3-0.4mm), cutting width is that 0.5mm(can select in 0.5-0.6mm);
Step 5, with blade root shoulder steam output side, integral shroud steam output side and blade root back of the body sagittal plane location, the cutter of selecting cutting edge and five fork blade-root molded lines to match, its rotating speed be 25 or 30r/min(can in 25-30r/min, select), feed speed is 12.5mm/min, the depth of cut is to select in 0.5mm or 0.8mm(0.5mm-0.8mm), along rectilinear direction, five fork blade-root molded lines of blade are carried out to finish-milling processing.
The processing method of five fork blade root self-crown moving vanes of the present invention, according to the feature of five fork blade root self-crown moving vanes, positioning reference plane in unified manufacturing procedure, adopt disposable clamping to complete the processing of each portion, can effectively avoid accumulated error, improve machining accuracy, and optimize integrated processing, shorten the product process-cycle, reduce the need quantity of lathe, reduce production costs.By disposable clamping, all sites roughing by product except blade-root molded line completes simultaneously; By high speed, stand the integrated fine finishining of carrying on the back camber line in datum level and integral shroud that added; The uniformity of product is reached more than 95%, and presentation quality improves more than 50% than conventional machining mode.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination disclosing in this manual, and the arbitrary new method disclosing or step or any new combination of process.
Claims (2)
1. a processing method for five fork blade root self-crown moving vanes, is characterized in that: comprise the following steps:
Step 1, blade blank is installed on lathe, adopts three thimbles to carry out clamping to the positioning datum of blade, and set up clamp mechanism in blade root both sides, below integral shroud, set up float support;
Step 2, roughing: the processing of blade root and integral shroud is selected and is provided with the milling cutter that cutting angle radius is the blade of 0.4mm, its rotating speed is 2000-2200r/min, feed speed is 3000-3500mm/min, and cutting depth requires as 0.8-1mm, cutting width: 12-15mm; Wherein the processing of steam passage molded line is selected and is provided with the nose of an ox cutter that cutting angle radius is the circular knife of 5mm, its rotating speed is 2200-2500r/min, and feed speed is 2500-3000 mm/min, and cutting depth is 1-2 mm, cutting width: 6-8mm;
Step 3, semifinishing: selecting and being provided with bull nose is that the blade milling cutter of the corrugated blade of 1.6mm is processed each portion, and its rotating speed is 3200-3500r/min, and feed speed is 3500-4000mm/min, and cutting depth is 0.6-0.8mm; Cutting width: 10-12mm;
Step 4, fine finishining: first select and be provided with each portion of blade milling cutter fine finishining that bull nose is the circular knife of 5mm, its rotating speed is 2800-3200r/min, and feed speed is 2500-3000 mm/min, and cutting depth is 0.3-0.4mm, and cutting width is 0.3-0.4mm;
Next is selected and is provided with the dish milling cutter that bull nose is the corrugated blade of 1.6mm, to blade root radially face carry out fine finishining, its rotating speed is 1200-1600r/min, feed speed is 800-1000 mm/min, cutting depth is 0.1-0.2mm, cutting width is 0.3-0.4mm;
Finally select and be provided with the rose cutter that round radius is the rose cutter blade of 6mm, to blade steam passage, portion carries out fine finishining, and its rotating speed is 3000-3500r/min, and feed speed is 4500-5500mm/min, cutting depth is 0.3-0.4mm, and cutting width is 0.5-0.6mm;
Step 5, with blade root shoulder steam output side, integral shroud steam output side and blade root back of the body sagittal plane location, the cutter of selecting cutting edge and five fork blade-root molded lines to match, its rotating speed is 25-30r/min, feed speed is 12.5mm/min, the depth of cut is 0.5-0.8mm, along rectilinear direction, five fork blade-root molded lines of blade is carried out to finish-milling processing.
2. the processing method of five fork blade root self-crown moving vanes as claimed in claim 1, is characterized in that: in step 2, and the milling cutter processing to blade root and integral shroud, its rotating speed is 2000r/min, feed speed is 3500mm/min, and cutting depth requires as 0.8mm, and cutting width is 15mm; Nose of an ox cutter to steam passage profile processing, its rotating speed is 2500r/min, and feed speed is 3000 mm/min, and cutting depth is 1 mm, and cutting width is 7mm;
In step 3, to the semi-finished blade milling cutter of each, its rotating speed is 3200r/min, and feed speed is 3500mm/min, and cutting depth is 0.6mm; Cutting width is 12mm;
In step 4, each portion is carried out to accurately machined blade milling cutter, its rotating speed is 3200r/min, and feed speed is 2500mm/min, and cutting depth is 0.3mm, and cutting width is 0.3mm;
To blade root radially face carry out accurately machined dish milling cutter, its rotating speed is 1600r/min, feed speed is 800mm/min, cutting depth is 0.2mm, cutting width is 0.3mm;
To blade steam passage, portion carries out accurately machined rose cutter, and its rotating speed is 3000r/min, and feed speed is 4500mm/min, and cutting depth is 0.3mm, and cutting width is 0.6mm;
In step 5, the cutter that five fork blade-root molded lines are carried out to finish-milling processing, its rotating speed is 28r/min, and feed speed is 12.5mm/min, and the depth of cut is 0.6mm.
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