CN111702423A - Rotational flow core processing method - Google Patents
Rotational flow core processing method Download PDFInfo
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- CN111702423A CN111702423A CN202010614112.1A CN202010614112A CN111702423A CN 111702423 A CN111702423 A CN 111702423A CN 202010614112 A CN202010614112 A CN 202010614112A CN 111702423 A CN111702423 A CN 111702423A
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- 238000003672 processing method Methods 0.000 title claims description 9
- 238000003754 machining Methods 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000003801 milling Methods 0.000 claims description 26
- 238000005553 drilling Methods 0.000 claims description 20
- 210000002268 wool Anatomy 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 238000012797 qualification Methods 0.000 abstract description 4
- 238000004904 shortening Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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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 invention discloses a method for processing a rotational flow core, which comprises the steps of selecting rotational flow core rough materials with the length larger than that of the rotational flow core to be formed, completing the processing of one end surface and the outer surface of the rotational flow core through one-time clamping of a main shaft, avoiding repeated clamping, reducing the times of disassembly and assembly, processing by one-time reference, improving the processing precision, reducing the times of assembly, improving the processing efficiency and shortening the period; finally, the other end face of the rotational flow core is molded and machined through coaxial clamping of a lathe auxiliary shaft, so that the machining coaxiality is ensured, and the machining precision can be effectively ensured; and finally, the surface of the rotational flow core is polished, so that the size consistency and the surface quality of the rotational flow core parts are improved, and the performance debugging operation intensity, the debugging qualification rate and the debugging efficiency after the rotational flow core parts are assembled to the assembly are reduced.
Description
Technical Field
The invention belongs to the field of machining of rotational flow core parts, and particularly relates to a rotational flow core machining method.
Background
The main structure of the nozzle is composed of four parts, namely a sealing surface, a matching surface, a through-flow oil passage and a rotational flow oil passage, wherein the sealing surface is generally in a spherical surface, conical surface or plane mode, the matching surface is generally in a cylindrical surface clearance fit mode, the through-flow oil passage is generally in a cylindrical surface/inner cavity slotted mode and an end surface/conical surface uniform straight hole mode, and the rotational flow oil passage is generally in a uniform rectangular straight groove mode, a multi-head worm rod-shaped spiral groove mode or a uniform straight hole mode.
From the aspect of machining precision, the precision of the main working surface is IT5-8 grade, the surface roughness is Ra0.2-0.8 mu m, and the roughness requirement of the non-matching surface is Ra1.6 mu m; in the aspect of technical requirement precision, the perpendicularity of the sealing surface to the matching surface is 0.005-0.02; in the aspect of materials, the martensitic stainless steel is required to be quenched and then tempered, and the hardness requirement after finish machining is that HRC is more than or equal to 50.
Because the structure of the rotational flow core is complex and the requirement on the dimensional precision is high, the existing processing method mainly selects rotational flow core rough materials with the size which is not much different from that of a finished product according to the size of the rotational flow core, and a top sharp hole is formed in the turning excircle of the rotational flow core rough materials to directly determine the length of the rotational flow core; then, carrying out structural processing on other parts of the rotational flow core; the finished length size is finished, so that the parts are easily scrapped due to unstable clamping in the process of switching and clamping the processing of other parts; the processing period and the turnover time are long, the cutting processing time is 2 hours per piece, the processing period is about 50 days per hundred pieces, and the average qualification rate is 69%; the turning of the multi-thread groove has low efficiency, poor luminosity and unstable part size; during grinding and machining of the cylindrical grinder, R0.3max at the corner of an outer cylindrical surface and a left end surface is difficult to guarantee, the size consistency of parts is poor, assembly flow debugging is difficult, and the debugging qualified rate is only 60% at present.
Disclosure of Invention
The invention aims to provide a method for processing a rotational flow core, which overcomes the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a processing method of a rotational flow core comprises the following steps:
step 1), taking a rotational flow core blank of which the length is greater than that of a rotational flow core to be formed after a main shaft of the turning and milling composite equipment is clamped;
step 2), performing end face turning flattening on one end of the rotational flow core blank by using the turning function of the turning and milling composite equipment, and then finishing turning processing on the shape of the rotational flow core to be formed from the end face;
step 3), after the appearance turning is finished, locking the main shaft to finish the processing of the hole groove on the surface of the rotational flow core wool;
step 4), after finishing processing the surface hole grooves of the rotational flow core blanks, aligning and clamping the outer blanks of the rotational flow core through the auxiliary main shaft, and then cutting off the rotational flow core blanks and flattening the end face;
step 5), carrying out appearance and drilling treatment on the other end of the vehicle on the other end of the rotational flow core wool;
and 6) finally, carrying out vacuum heat treatment and grinding processing to finish the processing of the rotational flow core.
Further, in the step 1), the rotational flow core blank is additionally arranged on a turning and milling main shaft, and the turning and milling length meets the length requirement of the rotational flow core to be processed.
Further, clamping the rotational flow core rough material through a main shaft of the turning and milling composite equipment, turning the end face of the rotational flow core rough material by a turning method, and turning the appearance of the rotational flow core rough material to form a coarse rotational flow core rough material workpiece.
Furthermore, machining allowance is reserved when the shape of the swirling flow core rough material is cut.
Further, after turning the surface of the rotational flow core blank, drilling a central hole at the end of the blank rough machining part, aligning the rotation center for positioning, turning a groove, and then performing through-flow hole drilling cone and milling rotational flow groove in the groove surface.
Furthermore, before the through-flow hole drill bit, a positioning central hole is drilled, and then the through-flow hole drill bit is carried out.
Further, after the blank end is machined, the auxiliary main shaft is aligned with the main shaft and then clamps the excircle of the turning rotational flow core in the step 2), firstly, the blank of the rotational flow core is cut off and the end surface is flat, then, a center hole is drilled at the other end of the blank of the rotational flow core, an oil duct is obtained by drilling the center hole, and finally, the oil duct is subjected to boring chamfering or spot facing chamfering.
Further, the swirl core piece is subjected to burr treatment before vacuum heat treatment.
And further, after vacuum heat treatment, grinding and finish machining of the excircle and the end face are sequentially carried out, and finally cleaning and drying are carried out to finish machining of the rotational flow core.
Furthermore, the angle interpolation of the conical surface oil through hole is realized by the deflection angle function of the main shaft of the tool of the turning and milling combined machining center, and the distribution machining along the conical surface cylinder is realized by the automatic indexing function of the main shaft of the tool of the turning and milling combined machining center.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the rotational flow core processing method, the rotational flow core rough material with the length larger than that of the rotational flow core to be formed is selected, the processing of one end face and the outer surface of the rotational flow core is completed through one-time clamping of the main shaft, repeated clamping is not needed, the number of times of disassembly and assembly is reduced, processing is carried out on one-time basis, the processing precision is improved, the number of times of assembly is reduced, the processing efficiency is improved, and the period is shortened; finally, the other end face of the rotational flow core is molded and machined through coaxial clamping of a lathe auxiliary shaft, so that the machining coaxiality is ensured, and the machining precision can be effectively ensured; and finally, the surface of the rotational flow core is polished, so that the size consistency and the surface quality of the rotational flow core parts are improved, and the performance debugging operation intensity, the debugging qualification rate and the debugging efficiency after the rotational flow core parts are assembled to the assembly are reduced.
Furthermore, before the through-flow hole drill bit, the positioning center hole is drilled, and then the through-flow hole drill bit is carried out, so that the direct drill bit is prevented from causing large impact on the cyclone core rough material and influencing machining errors.
Furthermore, the angle interpolation of the conical oil through hole is realized through the deflection angle function of the main shaft of the turning and milling composite machining center cutter; the automatic indexing function of the tool spindle of the turning and milling combined machining center is utilized to realize the distributed machining of 4 holes along the conical surface cylinder, and the machining precision is improved.
Drawings
FIG. 1 is a schematic structural diagram of a swirling core in an embodiment of the present invention.
Fig. 2 is a schematic view of the structure of fig. 1A.
Fig. 3 is a cross-sectional view of fig. 2B-B.
Fig. 4 is a sectional view taken along the direction of fig. 1C.
FIG. 5 is a schematic diagram of a size structure of a swirling core in an embodiment of the present invention.
FIG. 6 is a process diagram of the cyclone core processing in the embodiment of the invention.
FIG. 7 is a schematic diagram of the structure of the outer circle and the end face of the rotational flow core in the embodiment of the present invention.
In the figure, 1, sealing surface; 2. a through-flow aperture; 3. an oil passage.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
the structure of the rotational flow core to be processed is shown in figures 1 to 4; specifically discloses a processing method of a rotational flow core, which comprises the following steps:
step 1), taking, milling, clamping and then taking the cyclone core wool with the length larger than that of the cyclone core to be molded;
step 1), adding the cyclone core blank on a turning and milling main shaft, wherein the turning and milling length meets the length requirement of the cyclone core to be processed;
step 2), utilizing a lathe to perform end face turning flattening on one end of the rotational flow core wool, and then finishing turning machining of the shape of the rotational flow core to be formed from the end face;
specifically, clamping the cyclone core rough material through a lathe spindle, aligning and positioning through the lathe spindle, turning the cyclone core rough material after the end face of the cyclone core rough material is leveled through a turning method to form a cyclone core rough material rough machining part; a machining allowance is reserved when the shape of the rotational flow core rough material is turned, and the machining allowance is reserved to be 0.1 mm;
step 3), after the appearance turning is finished, fixing the main shaft to finish the processing of the hole groove on the surface of the rotational flow core wool;
specifically, after turning the surface of the rotational flow core blank, drilling a central hole at the end of a blank rough machining part, aligning the rotation center for positioning, turning a groove, and then performing through-flow hole drilling cone and milling rotational flow groove in the surface of the groove;
before the through-flow hole drill bit, a positioning center hole is drilled, and then the through-flow hole drill bit is carried out, so that the direct drill bit is prevented from causing large impact on the rotational flow core wool and influencing machining errors.
Step 4), after the processing of the hole grooves on the surface of the cyclone core wool is finished, aligning and clamping the cyclone core wool through an auxiliary shaft, and then cutting off the cyclone core wool and flattening the end surface;
and 5) performing vehicle spherical surface and drilling treatment on the other end of the rotational flow core blank, and finally performing vacuum heat treatment and polishing to finish the rotational flow core processing.
Specifically, firstly, a central hole is drilled at the other end of the rotational flow core blank, an oil passage is obtained by drilling the central hole, and finally, the oil passage is subjected to boring chamfering or countersinking chamfering, and finally, burr treatment is carried out. And performing burr treatment on the rotational flow core piece before vacuum heat treatment. And after vacuum heat treatment, sequentially polishing the excircle and the end face, and finally cleaning and drying to finish the machining of the rotational flow core. And (5) carrying out finished product detection on the obtained cyclone core, and warehousing qualified products. According to the rotational flow core processing method, the rotational flow core rough material with the length larger than that of the rotational flow core to be formed is selected, the processing of one end face and the outer surface of the rotational flow core is completed through one-time clamping of the main shaft, repeated clamping is not needed, the number of times of disassembly and assembly is reduced, processing is carried out on one-time basis, the processing precision is improved, the number of times of assembly is reduced, the processing efficiency is improved, and the period is shortened; finally, the other end face of the rotational flow core is molded and machined through coaxial clamping of a lathe auxiliary shaft, so that the machining coaxiality is ensured, and the machining precision can be effectively ensured; and finally, the surface of the rotational flow core is polished, so that the size consistency and the surface quality of the rotational flow core parts are improved, and the performance debugging operation intensity, the debugging qualification rate and the debugging efficiency after the rotational flow core parts are assembled to the assembly are reduced.
Examples
(1) Taking the rotational flow core blank which is clamped by a turning mill and has the length larger than that of the rotational flow core to be formed, and adding the rotational flow core blank on a turning mill spindle, wherein the size of the rotational flow core to be formed is shown in figure 5; a phi 10 clamp spring is arranged on a main shaft, and a phi 5 clamp spring is arranged on an auxiliary main shaft;
(2) turning and milling the inner appearance and the drilled holes of the rotational flow core blank, wherein the process diagram is shown in figure 6:
step 1: clamping the rough material by the main shaft, flattening the end surface, roughly and finely turning the shape to obtain a cyclone core rough material structure shown in figure 6a, and summarizing the processing process to ensure the relevant size; using a cutter: an 85-degree external turning tool;
step 2: drilling a central hole to obtain a rotational flow core rough material structure shown in figure 6b, and summarizing the processing process to ensure the relevant size; using a cutter: phi 0.8 center drill;
step 3: turning a groove to obtain a cyclone core rough material structure shown in figure 6c, and summarizing the machining process to ensure the relevant size; using a cutter: a 35-degree reverse profiling cutter;
step 4: drilling a central hole (four through hole positions of the conical surface) to obtain a cyclone core blank structure shown in figure 6d, and summarizing the machining process to ensure the relevant size; using a cutter: phi 0.5 center drill;
step 5: drilling four through holes on the conical surface to obtain a cyclone core blank structure shown in figure 6e, and summarizing the machining process to ensure the relevant size; using a cutter: phi 0.8 step drill;
step 5, realizing the angle interpolation of the conical oil through hole by the turning and milling combined machining center cutter main shaft deflection angle function; the automatic indexing function of the tool spindle of the turning and milling combined machining center is utilized to realize the distributed machining of 4 holes along the conical surface cylinder, and the machining precision is improved.
Step 6: milling four swirl grooves to obtain a swirl core blank structure shown in figure 6f, and summarizing the processing process to ensure the relevant size; using a cutter: phi 1.1 end mill;
step 7: the auxiliary main shaft is butted, the clamping length is L +0.5, and the cyclone core blank structure shown in figure 6g is obtained by cutting, the related dimension is ensured in the process of processing, and the total length L is larger than the length of the cyclone core to be formed; and (5) reserving machining allowance. Using a cutter: a 2mm width cut-off knife;
step 8: the plain end face, the car sphere obtains like fig. 6h whirl core woollen structure, and the relevant size is guaranteed in the course of working gathering, uses the cutter: an 85-degree external turning tool;
step 9: and (3) drilling a central hole to obtain a cyclone core blank structure as shown in fig. 6i, gathering the machining process to ensure relevant dimensions, and using a cutter: phi 0.8 center drill;
step 10: drilling to obtain a cyclone core blank structure as shown in figure 6j, gathering the machining process to ensure the relevant size, and using a cutter: phi 3 drill bit;
step 11: boring a chamfer or a countersink chamfer to obtain a swirl core blank structure as shown in figure 6k, gathering the machining process to ensure relevant dimensions, and using a cutter: phi 3 boring cutter (special countersink for 90 degrees).
(3) Deburring and vacuum heat treatment are sequentially carried out after the internal appearance and the drilling of the rotational flow core blank are finished;
(4) finally, grinding the excircle and the end face of the hollow processed semi-finished product cyclone core, and summarizing the processing process to ensure the relevant dimensions as shown in FIG. 7;
(5) and after polishing the excircle and the end face, cleaning, inspecting a finished product and warehousing.
It should be noted that, as described above, according to the functional requirements of the swirl core of different product models, the main components of the swirl core are characterized in that the sealing surface, the matching surface, the through-flow oil passage and the swirl oil passage adopt different design structures, and the technical scheme and the embodiment listed in the invention only list the swirl core structure and the processing method in one mode, for example, when the through-flow oil passage adopts a cylindrical surface/inner cavity slotted type, the corresponding steps 4 and 5 in the step 2 are adaptively adjusted to mill uniformly distributed grooves; for another example, when the swirl oil passage generally adopts a uniformly distributed straight hole type, the corresponding step 6 in the step 2 is adaptively adjusted to be a step of drilling a central hole and a hole. By means of the method, the finished product is subjected to spot inspection, the finished product processing qualified rate is improved to more than 98%, the production period is shortened by more than 2 times, the size consistency and the surface quality of the cyclone core type parts are improved, and the performance debugging operation strength, the debugging qualified rate and the efficiency after the cyclone core type parts are assembled to the assembly are reduced.
Claims (10)
1. A processing method of a rotational flow core is characterized by comprising the following steps:
step 1), taking a rotational flow core blank of which the length is greater than that of a rotational flow core to be formed after a main shaft of the turning and milling composite equipment is clamped;
step 2), performing end face turning flattening on one end of the rotational flow core blank by using the turning function of the turning and milling composite equipment, and then finishing turning processing on the shape of the rotational flow core to be formed from the end face;
step 3), after the appearance turning is finished, locking the main shaft to finish the processing of the hole groove on the surface of the rotational flow core wool;
step 4), after finishing processing the surface hole grooves of the rotational flow core blanks, aligning and clamping the outer blanks of the rotational flow core through the auxiliary main shaft, and then cutting off the rotational flow core blanks and flattening the end face;
step 5), carrying out appearance and drilling treatment on the other end of the vehicle on the other end of the rotational flow core wool;
and 6) finally, carrying out vacuum heat treatment and grinding processing to finish the processing of the rotational flow core.
2. The method for processing the rotational flow core according to claim 1, wherein in the step 1), the rotational flow core blank is additionally arranged on a turning and milling main shaft, and the turning and milling length meets the length requirement of the rotational flow core to be processed.
3. The method for machining the rotational flow core according to claim 1, wherein the rotational flow core rough material is clamped by a main shaft of a turning and milling composite device, and then the end face of the rotational flow core rough material is turned to be flat by a turning method, and then the shape of the rotational flow core rough material is turned to form a coarse workpiece of the rotational flow core rough material.
4. The method as claimed in claim 3, wherein the machining allowance is left when the shape of the cyclone core blank is cut.
5. The method for machining the cyclone core according to claim 1, wherein after the turning of the surface of the cyclone core blank is completed, a center hole is drilled in the end of a blank rough workpiece, the rotation center is aligned and positioned, then a groove is turned, and then a through-flow hole drilling cone and a milling cyclone groove are performed in the surface of the groove.
6. A method for machining a cyclone core as claimed in claim 5, wherein the through-flow hole drill is preceded by drilling a locating central hole and then by drilling a through-flow hole drill.
7. The method for machining the swirling core according to claim 1, wherein after the machining of the blank end is completed, the turned outer circle of the swirling core in the step 2) is clamped after the auxiliary main shaft is aligned with the main shaft, the blank of the swirling core is firstly cut off and the end surface is flattened, then a central hole is drilled at the other end of the blank of the swirling core, an oil passage is obtained by drilling the central hole, and finally the oil passage is subjected to boring chamfering or spot facing chamfering.
8. The method of claim 1, wherein the swirl core piece is deburred before the vacuum heat treatment.
9. The method for processing the cyclone core according to claim 1, wherein after the vacuum heat treatment, the outer circle and the end face are ground and finished in sequence, and finally the cyclone core is cleaned and dried to finish the processing of the cyclone core.
10. The machining method of the rotational flow core as claimed in claim 6, wherein the angular interpolation of the conical oil through hole is realized by the function of the deflection angle of the main shaft of the tool of the turning and milling combined machining center, and the distributed machining along the conical cylinder is realized by the function of the automatic indexing of the main shaft of the tool of the turning and milling combined machining center.
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| CN202010614112.1A CN111702423A (en) | 2020-06-30 | 2020-06-30 | Rotational flow core processing method |
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| CN202010614112.1A CN111702423A (en) | 2020-06-30 | 2020-06-30 | Rotational flow core processing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112959016A (en) * | 2021-03-17 | 2021-06-15 | 中国航发动力股份有限公司 | Machining method of lubricating oil nozzle parts |
| CN113118717A (en) * | 2021-05-07 | 2021-07-16 | 广东恒基金属制品实业有限公司 | Manufacturing process of throttle valve core |
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| EP0556976A1 (en) * | 1992-02-19 | 1993-08-25 | Lucas Industries Public Limited Company | Fuel injection nozzles |
| CN102806443B (en) * | 2012-08-14 | 2014-04-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Numerically-controlled processing method of nozzle housing piece |
| CN105290738B (en) * | 2015-11-22 | 2017-09-29 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of method of spout class machine parts'precise processing |
| CN110421316A (en) * | 2018-12-21 | 2019-11-08 | 西安成立航空制造有限公司 | A kind of new process research method of fuel nozzle processing |
| CN111375983A (en) * | 2020-03-31 | 2020-07-07 | 中国航发动力股份有限公司 | Turning and milling composite machining method for structural part |
-
2020
- 2020-06-30 CN CN202010614112.1A patent/CN111702423A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0556976A1 (en) * | 1992-02-19 | 1993-08-25 | Lucas Industries Public Limited Company | Fuel injection nozzles |
| CN102806443B (en) * | 2012-08-14 | 2014-04-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Numerically-controlled processing method of nozzle housing piece |
| CN105290738B (en) * | 2015-11-22 | 2017-09-29 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of method of spout class machine parts'precise processing |
| CN110421316A (en) * | 2018-12-21 | 2019-11-08 | 西安成立航空制造有限公司 | A kind of new process research method of fuel nozzle processing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112959016A (en) * | 2021-03-17 | 2021-06-15 | 中国航发动力股份有限公司 | Machining method of lubricating oil nozzle parts |
| CN113118717A (en) * | 2021-05-07 | 2021-07-16 | 广东恒基金属制品实业有限公司 | Manufacturing process of throttle valve core |
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Application publication date: 20200925 |