CN108994535A - A kind of processing method of the trapezoidal annular groove of centrifugal compressor air duct flange - Google Patents
A kind of processing method of the trapezoidal annular groove of centrifugal compressor air duct flange Download PDFInfo
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- CN108994535A CN108994535A CN201810833903.6A CN201810833903A CN108994535A CN 108994535 A CN108994535 A CN 108994535A CN 201810833903 A CN201810833903 A CN 201810833903A CN 108994535 A CN108994535 A CN 108994535A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The present invention provides a kind of processing methods of trapezoidal annular groove of centrifugal compressor air duct flange, include the following steps: for centrifugal compressor casing to be placed on the equal-height padding iron on boring table, centering keeps centrifugal compressor air duct flange faying face vertical with boring spindle axis；Boring centrifugal compressor air duct flange combination plane and seam allowance；First cotter mill cutter is installed on boring spindle, the half ± 0.5mm of keystone ring groove depth to groove depth is processed in centrifugal compressor air duct flange combination plane；The first cotter mill cutter is dismantled, the second cotter mill cutter is installed, processes trapezoidal annular groove to slot bottom；The second cotter mill cutter is dismantled, installation forming milling cutter is completed the process the bevel edge of trapezoidal annular groove using screwfeed method.A kind of processing method of trapezoidal annular groove of centrifugal compressor air duct flange provided by the invention, not only machining accuracy is high but also processing efficiency is also high.
Description
Technical field
The present invention relates to flange face sealing slot processing technique field, in particular to a kind of centrifugal compressor air duct flange is trapezoidal
The processing method of annular groove.
Background technique
Referring to Fig. 1 and Fig. 2, it is often set in the flange faying face of vertical dissection type centrifugal compressor air duct flange and pairing
Meter section is trapezoidal annular seal pocket.The processing of this trapezoidal annular groove is a problem of centrifugal compressor manufacture, trapezoidal annular groove
Machining accuracy directly determine its cooperation precision with sealing steel ring, if precision is insufficient, centrifugal compressor air duct flange connect
The sealing performance for meeting place is insufficient, will cause the phenomenon that leaks air during compressor operation, even production development thing when serious
Therefore.The efficiency of the trapezoidal annular groove of simultaneous processing also determines the manufacturing cost of centrifugal compressor.Therefore need a kind of machining accuracy it is high,
The processing method that operating method is simple, the used time is shorter guarantees to process the precision and efficiency of trapezoidal annular groove.
The equipment of the processing trapezoidal annular groove of centrifugal compressor air duct flange is numerical control borer at present, and when processing sets casing end face
In on workbench, air duct flange faying face is vertical with boring spindle axis, the facing head accessory head carried using boring machine, by white steel
Cutter first processes the trough portion in trapezoidal annular groove, as shown in Figure 3 together on facing head；Recycle facing head and main shaft
Linkage motion cutting straight trough two sides inclined-plane, as shown in Figure 4.This processing method needs facing head machine tool accessories, and processing is comparatively laborious, and
Since white steel bar cutter is prone to wear out, it will cause processing trapezoidal inclined plane precision and generate certain error.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of high and high in machining efficiency centrifugal compressors of machining accuracy
The processing method of the trapezoidal annular groove of air duct flange.
In order to solve the above technical problems, the present invention provides a kind of processing sides of trapezoidal annular groove of centrifugal compressor air duct flange
Method includes the following steps:
Centrifugal compressor casing is placed on the equal-height padding iron on boring table, centering makes centrifugal compressor air duct flange
Faying face is vertical with boring spindle axis；
Boring centrifugal compressor air duct flange combination plane and seam allowance；
First cotter mill cutter is installed on boring spindle, processes keystone ring in centrifugal compressor air duct flange combination plane
Groove depth to groove depth half ± 0.5mm；
The first cotter mill cutter is dismantled, the second cotter mill cutter is installed, processes trapezoidal annular groove to slot bottom；
The second cotter mill cutter is dismantled, installation forming milling cutter is processed the bevel edge of trapezoidal annular groove using screwfeed method
At.
Further, the centering is to be placed in machine tool rotary working table using compressor outlet body end surface as basal plane
On equal-height padding iron, by compressor air duct cylinder bore and machine tool rotary center centering, guarantee in inner hole center and rotary table
The heart is overlapped.
Further, the section of the trapezoidal annular groove it is trapezoidal it is upper it is wide having a size of 3.35mm, 5.19mm, 7.24mm or
9.06mm, the trapezoidal both sides angle in section is 46 degree.
Further, the section of the trapezoidal annular groove it is trapezoidal it is upper it is wide having a size of except 3.35mm, 5.19mm, 7.24mm or
Other sizes other than 9.06mm.
Further, the diameter dimension of first cotter mill cutter it is more trapezoidal than the section it is it is wide with it is lower two points the sum of wide
One of small 0.5-2.5mm.
Further, the diameter dimension of the second cotter mill cutter upper wide size small 0.5- more trapezoidal than the section
2.5mm。
Further, described to process trapezoidal annular groove in centrifugal compressor air duct flange combination plane, it is by boring machine x-axis
Milling is carried out around cylinder bore center with the first cotter mill cutter of y-axis linked manner and the second cotter mill cutter.
Further, it is respectively tetra- kinds of 3.35mm, 5.19mm, 7.24mm or 9.06mm that the profile milling cutter, which has upper wide size,
The profile milling cutter of model.
Further, when the bevel edge for processing trapezoidal annular groove with profile milling cutter, the section of the trapezoidal annular groove is trapezoidal
Upper width size is identical as the upper wide size of the profile milling cutter, using the method for two-sided processing, that is, uses spiral way feed,
While x-axis and y-axis link, guarantees the z-axis amount of feeding, the processing of trapezoidal annular groove is completed after reaching drawing size.
Further, when the bevel edge for processing trapezoidal annular groove with profile milling cutter, the upper wide size of the profile milling cutter is small
In the section of the trapezoidal annular groove, trapezoidal upper wide size uses spiral tool feeding method using the method for single-sided process, first plus
The side inclined-plane of the trapezoidal annular groove of work, then the other side inclined-plane of trapezoidal annular groove is processed using the method for same screwfeed, it is reaching
The processing of trapezoidal annular groove is completed after to drawing size.
A kind of processing method of trapezoidal annular groove of centrifugal compressor air duct flange provided by the invention, using cotter mill cutter and at
Type milling cutter completes the processing of trapezoidal annular groove, that is, needs secondary tool changing that whole processing of trapezoidal annular groove can be completed, avoid tradition
The work that facing head is installed in processing method, has saved the time of installation facing head machine tool accessories, and one is only needed in process
Secondary centering can make process time shorten to the half of traditional processing used time, substantially increase processing efficiency；Also, this processing side
Method avoids installation facing head and the labour work of centering repeatedly, reduces the labor intensity of numerical control borer operator, improves
Working efficiency.Meanwhile this processing method can also avoid the knife of the mismachining tolerance and cutter that generate using machine tool accessories facing head
The mismachining tolerance that sharpening damage generates, improves the precision of processing.In addition, since profile milling cutter manufacturing cost is higher, it uses
Cotter mill cutter first processes trapezoidal annular groove, and that has saved molding cutter uses the time, and ensure that molding cutter uses the longevity
Life, reduces processing cost.
Detailed description of the invention
Fig. 1 is the centrifugal compressor air duct flange arrangement schematic diagram that design has trapezoidal annular groove；
Fig. 2 is the structural representation of the trapezoidal annular groove amplification of centrifugal compressor air duct flange；
Fig. 3 be traditional trapezoidal annular groove of centrifugal compressor air duct flange processing method in process the straight trough portion of trapezoidal annular groove
Divide schematic diagram；
Fig. 4 be traditional trapezoidal annular groove of centrifugal compressor air duct flange processing method in process the straight trough two of trapezoidal annular groove
Side chamfered portion schematic diagram；
Fig. 5 is the processing method flow chart of the trapezoidal annular groove of centrifugal compressor air duct flange provided in an embodiment of the present invention；
Fig. 6 is trapezoidal annular groove in the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange provided in an embodiment of the present invention
Each dimensional structure schematic diagram；
Fig. 7 is the Milling Process schematic diagram of the trapezoidal annular groove of centrifugal compressor air duct flange provided in an embodiment of the present invention；
Fig. 8 is the first keyway in the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange provided in an embodiment of the present invention
Milling cutter Working position schematic diagram；
Fig. 9 is the second keyway in the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange provided in an embodiment of the present invention
Milling cutter Working position schematic diagram；
Figure 10 be the trapezoidal annular groove of centrifugal compressor air duct flange provided in an embodiment of the present invention processing method in using at
Type milling cutter processes the side inclined-plane schematic diagram of trapezoidal annular groove；
Figure 11 be the trapezoidal annular groove of centrifugal compressor air duct flange provided in an embodiment of the present invention processing method in using at
Type milling cutter processes the other side inclined-plane schematic diagram of trapezoidal annular groove；
Figure 12 is that milling is formed in the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange provided in an embodiment of the present invention
Knife process trapezoidal annular groove section it is trapezoidal after the completion of effect diagram.
Specific embodiment
Referring to Fig. 5, a kind of processing method of the trapezoidal annular groove of centrifugal compressor air duct flange provided in an embodiment of the present invention, packet
Include following steps:
Centrifugal compressor casing is placed on the equal-height padding iron on boring table, centering makes centrifugal compressor air duct flange
Faying face is vertical with boring spindle axis；
Boring centrifugal compressor air duct flange combination plane and seam allowance；
First cotter mill cutter is installed on boring spindle, processes keystone ring in centrifugal compressor air duct flange combination plane
Groove depth to groove depth half ± 0.5mm；
The first cotter mill cutter is dismantled, the second cotter mill cutter is installed, processes trapezoidal annular groove to slot bottom；
The second cotter mill cutter is dismantled, installation forming milling cutter is processed the bevel edge of trapezoidal annular groove using screwfeed method
At.
Wherein, the centering is to be placed in the contour of machine tool rotary working table using compressor outlet body end surface as basal plane
On parallels, by compressor air duct cylinder bore and machine tool rotary center centering, guarantee inner hole center and rotary table center weight
It closes.
Wherein, trapezoidal upper wide having a size of 3.35mm, 5.19mm, 7.24mm or 9.06mm in the section of the trapezoidal annular groove,
The trapezoidal both sides angle in section is 46 degree.
Wherein, the trapezoidal upper width in the section of the trapezoidal annular groove is having a size of except 3.35mm, 5.19mm, 7.24mm or 9.06mm
Other sizes in addition.
Wherein, the diameter dimension of first cotter mill cutter is more trapezoidal than the section wide with lower the sum of wide half
Small 0.5-2.5mm.
Wherein, the diameter dimension of the second cotter mill cutter upper wide size small 0.5-2.5mm more trapezoidal than the section.
Wherein, described to process trapezoidal annular groove in centrifugal compressor air duct flange combination plane, it is by boring machine x-axis and y
The first cotter mill cutter of axis linked manner and the second cotter mill cutter carry out milling around cylinder bore center.
Wherein, it is respectively tetra- kinds of models of 3.35mm, 5.19mm, 7.24mm or 9.06mm that the profile milling cutter, which has upper wide size,
Profile milling cutter.
Wherein, when the bevel edge for processing trapezoidal annular groove with profile milling cutter, the trapezoidal upper width in the section of the trapezoidal annular groove
Size is identical as the upper wide size of the profile milling cutter, using the method for two-sided processing, that is, spiral way feed is used, in x-axis
While linkage with y-axis, guarantees the z-axis amount of feeding, the processing of trapezoidal annular groove is completed after reaching drawing size.
Wherein, when the bevel edge for processing trapezoidal annular groove with profile milling cutter, the upper wide size of the profile milling cutter is less than institute
The trapezoidal upper wide size in the section of trapezoidal annular groove is stated, using the method for single-sided process, i.e., using spiral tool feeding method, first processing is terraced
The side inclined-plane of shape annular groove, then the other side inclined-plane of trapezoidal annular groove is processed using the method for same screwfeed, reaching figure
The processing of trapezoidal annular groove is completed after paper size.
Below to one kind provided in an embodiment of the present invention for processing trapezoidal annular groove on the air duct flange in H2587 casing
The processing method of the trapezoidal annular groove of centrifugal compressor air duct flange illustrates.
Totally two air duct flanges, diameter are φ 340mm to H2587 casing, and two air duct flange sizes are consistent.Referring to Fig. 6,
The trapezoidal upper width in the section for the trapezoidal annular groove processed on air duct flange is 8.9mm, and the trapezoidal height in section is 14.27mm, root
According to 46 ° of angle of trapezoidal trapezoidal two bevel edge of height 14.27mm and section in the trapezoidal upper wide 8.9mm in section, section, Ke Yiji
Calculating the trapezoidal lower wide size in section is about 23.01mm, and the central diameter for the trapezoidal annular groove that need to be processed is 280mm.One of them
Air duct flange carries out processing trapezoidal annular groove using conventional method.Another air duct flange uses processing method provided by the invention
Process trapezoidal annular groove.
Referring to Fig. 7, using the end face of the outlet end cylinder 1 of centrifugal compressor as basal plane, be placed in machine tool rotary working table 5 etc.
On high parallels 2, by centrifugal compressor air duct cylinder bore and machine tool rotary center centering, guarantee inner hole center and rotary table
Center is overlapped, and keeps centrifugal compressor air duct flange faying face vertical with 3 axis of boring spindle.
The air duct flange combination plane of first boring centrifugal compressor, and the seam allowance installed is connect with companion flange faying face.
Then it does not need to carry out centering to workpiece again, the first cotter mill cutter 4, the milling of the first keyway is installed on boring spindle
Knife is wider cotter mill cutter, diameter dimension be slightly less than trapezoidal annular groove section it is trapezoidal it is it is wide with it is lower it is the sum of wide by two/
One, due to the section of the trapezoidal annular groove of processing it is trapezoidal it is upper it is roomy it is small be 8.9mm, lower width be 23.01mm therefore pass through calculating
The cotter mill cutter for needing to select diameter as 14mm.The first cotter mill cutter 4 for choosing size is mounted on boring spindle 3, benefit
Prolonging z-axis direction to be cut into depth on air duct flange with the cutter head of the first cotter mill cutter 4 is 7mm, while passing through boring machine x-axis and y
The mode of axis linkage, carries out milling around cylinder bore center with the first cotter mill cutter 4, combines in centrifugal compressor air duct flange flat
The half that trapezoidal annular groove to depth is about groove depth is processed on face, as shown in Figure 8.
Trapezoidal annular groove after processing is completed, dismantles the first cotter mill cutter for the first time, selects the second cotter mill cutter, the milling of the second keyway
Knife is relatively narrow cotter mill cutter, and diameter dimension should be slightly less than the trapezoidal upper wide size in section of trapezoidal annular groove, and selection is straight herein
Diameter is the second cotter mill cutter of 8mm, and the second cotter mill cutter chosen is mounted on boring spindle 3, the second cotter mill cutter is utilized
Cutter head to prolong z-axis direction to be cut into depth be 14.27mm, while passing through boring machine x-axis and the second cotter mill cutter of y-axis linked manner
Milling is carried out around cylinder bore center, the slot bottom until being worked into trapezoidal annular groove, as shown in Figure 9.
After trapezoidal annular groove is worked into slot bottom, the second cotter mill cutter is dismantled, profile milling cutter is used instead and continues trapezoidal annular groove section
The processing of face trapezoidal hypotenuse.At present there are four types of profile milling cutters, i.e., wide size is respectively 3.35mm, 5.19mm on profile milling cutter,
Tetra- kinds of models of 7.24mm or 9.06mm, wherein cutter angle is all 46 degree.Under normal conditions, in order to facilitate profile milling cutter to trapezoidal
The processing of annular groove section trapezoidal hypotenuse, the trapezoidal upper wide size in the section for the trapezoidal annular groove processed on air duct flange are often also
3.35mm, 5.19mm, 7.24mm or 9.06mm, certainly sometimes for the keystone ring for needing to process on air duct flange of production and processing
The trapezoidal upper wide size in the section of slot is not above-mentioned four kinds of sizes but other sizes.If that processes on air duct flange is trapezoidal
The trapezoidal upper wide size in the section of annular groove is consistent with the gauge size of profile milling cutter, the method that can use two-sided processing, processing
Mode is using spiral way feed, i.e., not only x-axis and y-axis link, while also to guarantee that every one circle of processing will have enough z-axis
The amount of feeding, wherein spiral feed is guaranteed by numerical control of machine tools program work, and the processing of trapezoidal annular groove is completed after reaching drawing size.
If the trapezoidal upper wide size in the section for the trapezoidal annular groove processed on air duct flange and the gauge size of profile milling cutter are inconsistent,
The method using single-sided process is generally required, i.e., is less than the molding milling of the trapezoidal wide size of keystone ring slot cross-section using gauge size
Knife needs two knives to process the section trapezoidal inclined plane of trapezoidal annular groove.Referring to Figure 10 and Figure 11, spiral tool feeding method is still used, first
The side inclined-plane for processing trapezoidal annular groove processes ladder after completing side oblique surface machining, then using the method for same screwfeed
Another side of shape annular groove, completes the processing of trapezoidal annular groove after reaching drawing size.As a kind of specific reality of the invention
Apply mode, due to current embodiment require that processing trapezoidal annular groove section it is trapezoidal it is upper width having a size of 8.9mm, be not conventional
The trapezoidal upper wide size in the section of trapezoidal annular groove, therefore the present embodiment is used using the upper wide profile milling cutter having a size of 7.24mm
The mode of single-sided process is processed, and using the method for spiral feed, the side inclined-plane of trapezoidal annular groove is first processed for the first time, when complete
The another side of trapezoidal annular groove is processed behind the inclined-plane of side, then using the method for same screwfeed, is reaching drawing size
The processing of trapezoidal annular groove is completed afterwards, and the section of trapezoidal annular groove after processing is completed is trapezoidal as shown in figure 12.
It is compared by the processing of conventional method and the method for the present invention, a trapezoidal annular groove time is processed about using conventional method
8 hours, an about 4 hours trapezoidal annular groove time is processed using processing method provided by the invention, processes an air duct flange
Trapezoidal keyway has saved the production and processing time of half, greatly improves production efficiency.Secondly, by examining, it is provided by the invention
The trapezoidal annular groove of processing method processing while improving the production efficiency, similarly can satisfy drawing required precision.Finally, this
The processing method that invention provides can not need installation facing head and centering labour work repeatedly, therefore also reduce numerical control borer
The labor intensity of operator.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. a kind of processing method of the trapezoidal annular groove of centrifugal compressor air duct flange, which comprises the steps of:
Centrifugal compressor casing is placed on the equal-height padding iron on boring table, centering combines centrifugal compressor air duct flange
Face is vertical with boring spindle axis；
Boring centrifugal compressor air duct flange combination plane and seam allowance；
First cotter mill cutter is installed on boring spindle, keystone ring groove depth is processed in centrifugal compressor air duct flange combination plane
It spends to the half ± 0.5mm of groove depth；
The first cotter mill cutter is dismantled, the second cotter mill cutter is installed, processes trapezoidal annular groove to slot bottom；
The second cotter mill cutter is dismantled, installation forming milling cutter is completed the process the bevel edge of trapezoidal annular groove using screwfeed method.
2. the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange according to claim 1, it is characterised in that: described
Centering is placed on the equal-height padding iron of machine tool rotary working table using compressor outlet body end surface as basal plane, by compressor wind
Cylinder cylinder bore and machine tool rotary center centering guarantee that inner hole center is overlapped with rotary table center.
3. the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange according to claim 1, it is characterised in that: described
The trapezoidal upper width in the section of trapezoidal annular groove is having a size of 3.35mm, 5.19mm, 7.24mm or 9.06mm, the trapezoidal both sides angle in section
It is 46 degree.
4. the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange according to claim 3, it is characterised in that: described
The trapezoidal upper width in the section of trapezoidal annular groove is having a size of the other sizes in addition to 3.35mm, 5.19mm, 7.24mm or 9.06mm.
5. the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange according to claim 1, it is characterised in that: described
The diameter dimension of first cotter mill cutter is more trapezoidal than the section wide with lower the sum of the wide small 0.5-2.5mm of half.
6. the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange according to claim 1, it is characterised in that: described
The diameter dimension of the second cotter mill cutter upper wide size small 0.5-2.5mm more trapezoidal than the section.
7. the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange according to claim 1, it is characterised in that: described
Trapezoidal annular groove is processed in centrifugal compressor air duct flange combination plane, is by boring machine x-axis and the first key of y-axis linked manner
Slotting cutter and the second cotter mill cutter are around the progress milling of cylinder bore center.
8. the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange according to claim 4, it is characterised in that: described
It is respectively the profile milling cutter of tetra- kinds of models of 3.35mm, 5.19mm, 7.24mm or 9.06mm that profile milling cutter, which has upper wide size,.
9. the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange according to claim 8, it is characterised in that: described
When processing the bevel edge of trapezoidal annular groove with profile milling cutter, the trapezoidal upper wide size in the section of the trapezoidal annular groove and the profile milling cutter
Upper wide size it is identical, using the method for two-sided processing, that is, use spiral way feed, while x-axis and y-axis link, protect
The z-axis amount of feeding is demonstrate,proved, the processing of trapezoidal annular groove is completed after reaching drawing size.
10. the processing method of the trapezoidal annular groove of centrifugal compressor air duct flange according to claim 9, it is characterised in that: institute
It states when processing the bevel edge of trapezoidal annular groove with profile milling cutter, the upper wide size of the profile milling cutter is less than the section of the trapezoidal annular groove
Trapezoidal upper wide size is used spiral tool feeding method, is first processed a skew back of trapezoidal annular groove using the method for single-sided process
Face, then the other side inclined-plane of trapezoidal annular groove is processed using the method for same screwfeed, ladder is completed after reaching drawing size
The processing of shape annular groove.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101764A (en) * | 2021-12-27 | 2022-03-01 | 沈阳透平机械股份有限公司 | Processing method of water line of sealing surface of air duct flange of compressor shell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101764A (en) * | 2021-12-27 | 2022-03-01 | 沈阳透平机械股份有限公司 | Processing method of water line of sealing surface of air duct flange of compressor shell |
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