CN112091542A - Machining method for eliminating horn mouth of precise hole or ring groove - Google Patents
Machining method for eliminating horn mouth of precise hole or ring groove Download PDFInfo
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- CN112091542A CN112091542A CN202010946400.7A CN202010946400A CN112091542A CN 112091542 A CN112091542 A CN 112091542A CN 202010946400 A CN202010946400 A CN 202010946400A CN 112091542 A CN112091542 A CN 112091542A
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- ring groove
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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Abstract
The invention discloses a machining method for eliminating a precision hole or a ring groove bell mouth, and belongs to the technical field of machining. The method comprises the following steps: A. clamping the parts: clamping the part on a workbench of a numerical control machine tool; B. finish machining: carrying out numerical control straight line walking according to the design size intermediate value of the hole or the ring groove, and finely machining the precise hole or the ring groove; C. calculating a compensation value: measuring the diameter of the bottom of the hole or the bottom of the ring groove and the diameter of the hole or the outlet of the ring groove, and calculating a compensation value delta X; D. correcting a horn mouth: the original part is detached, then the new part is clamped on a workbench of a numerical control machine, the program of the numerical control machine is changed, the oblique line is machined to form an inverted cone, and the horn mouth is corrected. The numerical control machine tool is adopted to process the precise hole or the ring groove, when the horn mouth appears, the reason for forming the horn mouth does not need to be searched, the reason does not need to be analyzed, only the correction taper is added in the numerical control program, and the numerical control machine tool is simple and rapid to operate, and saves time and labor.
Description
Technical Field
The invention relates to a machining method for eliminating a precision hole or a ring groove bell mouth, and belongs to the technical field of machining.
Background
The precision holes and ring grooves on rotating parts of discs and shafts in aero-engines have high requirement on dimensional tolerance, generally H6 and H7, but in the final numerical control turning precision machining, the situation that the sizes of the bottoms of holes or grooves of a plurality of parts are qualified, but the sizes of outlets are out of tolerance, commonly called as 'bell mouths' occurs, and the quality of the parts is unstable. The sizes of the precise hole and the ring groove are generally matched sizes, strict interference magnitude requirements are met, the sizes are out of tolerance, the interference magnitude cannot be guaranteed, and accordingly parts are scrapped. When the bell mouth appears, the traditional treatment method generally analyzes reasons from the aspects of processes, tools, equipment, blanks, cooling liquid and the like, and then solves the bell mouth problem by taking medicines according to symptoms. For example, the prior process does not eliminate the flare of the hole; the cutting parameters are unreasonable, the generated cutting heat is greatly changed, the heating degree of the processed hole wall is inconsistent, the rigidity of the cutter is poor, and the clamping precision of the cutter is reduced; the cutting edge of the cutter has large run-out; the installation center lines of the cutters are not coincident or vibrate; the flare opening may be generated due to the bending of the cutter rod of the cutter, the unreasonable cutting angle of the cutter and the like.
Because the reasons for generating the bell mouth are many, and sometimes the bell mouth is generated due to the comprehensive influence of various factors, the process of finding the reasons and analyzing the reasons is complicated, and the problems of time and labor waste exist.
Disclosure of Invention
In order to solve the technical problems, the invention provides a processing method for eliminating a precision hole or a ring groove bell mouth.
The invention is realized by the following technical scheme:
a machining method for eliminating a horn mouth of a precise hole or an annular groove comprises the following steps:
A. clamping the parts: clamping the part on a workbench of a numerical control machine tool;
B. finish machining: carrying out numerical control straight line walking according to the design size intermediate value of the hole or the ring groove, and finely machining the precise hole or the ring groove;
C. calculating a compensation value: measuring the diameter of the bottom of the hole or the bottom of the ring groove and the diameter of the hole or the outlet of the ring groove, and calculating a compensation value delta X;
D. correcting a horn mouth: the original part is detached, then the new part is clamped on a workbench of a numerical control machine, the program of the numerical control machine is changed, the oblique line is machined to form an inverted cone, and the horn mouth is corrected.
And B, after the part is clamped on a workbench of the numerical control machine tool in the step A, jumping needs to be checked, and the jumping is not more than 0.01 mm.
The runout includes circular runout and full runout.
In the step B, the design dimension intermediate value is equal to the basic dimension + (upper deviation + lower deviation)/2.
Compensation value in the step C
Wherein
Is the average value of the actual diameter of the hole or ring groove outlet,
is the average value of the actual diameter of the bottom of the hole or the bottom of the ring groove.
And D, when the oblique line is processed in the step D, the diameter of the outlet of the hole or the ring groove is the middle value of the design size, and the diameter of the bottom of the hole or the bottom of the ring groove is the sum of the middle value of the design size and the compensation value delta X.
And D, after the step D is finished, measuring the size of the bottom of the hole or the bottom of the ring groove and whether the size of the hole or the outlet of the ring groove has out-of-tolerance or not, and then carrying out batch production.
The invention has the beneficial effects that: the numerical control machine tool is adopted to process the precise hole or the ring groove, when the horn mouth appears, the reason for forming the horn mouth does not need to be searched, the reason does not need to be analyzed, only the correction taper is added in the numerical control program, and the numerical control machine tool is simple and rapid to operate, and saves time and labor.
Drawings
FIG. 1 is a schematic view of a ring groove according to an embodiment of the present invention;
FIG. 2 is a processing diagram of an embodiment of the present invention before a program change;
fig. 3 is a processing diagram after program modification in the embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
The invention relates to a processing method for eliminating a precision hole or a ring groove bell mouth, which comprises the following steps:
A. clamping the parts: clamping the part on a workbench of a numerical control machine tool;
B. finish machining: carrying out numerical control straight line walking according to the design size intermediate value of the hole or the ring groove, and finely machining the precise hole or the ring groove;
C. calculating a compensation value: measuring the diameter of the bottom of the hole or the bottom of the ring groove and the diameter of the hole or the outlet of the ring groove, and calculating a compensation value delta X;
D. correcting a horn mouth: the original part is detached, then the new part is clamped on a workbench of a numerical control machine, the program of the numerical control machine is changed, the oblique line is machined to form an inverted cone, and the horn mouth is corrected.
And B, after the part is clamped on a workbench of the numerical control machine tool in the step A, jumping needs to be checked, and the jumping is not more than 0.01 mm.
The runout includes circular runout and full runout.
In the step B, the design dimension intermediate value is equal to the basic dimension + (upper deviation + lower deviation)/2.
Compensation value in the step C
Wherein
Is the average value of the actual diameter of the hole or ring groove outlet,
is the average value of the actual diameter of the bottom of the hole or the bottom of the ring groove.
And D, when the oblique line is processed in the step D, the diameter of the outlet of the hole or the ring groove is the middle value of the design size, and the diameter of the bottom of the hole or the bottom of the ring groove is the sum of the middle value of the design size and the compensation value delta X.
And D, after the step D is finished, measuring the size of the bottom of the hole or the bottom of the ring groove and whether the size of the hole or the outlet of the ring groove has out-of-tolerance or not, and then carrying out batch production.
According to the machining method for eliminating the horn mouth of the precise hole or the ring groove, the precise hole or the ring groove is machined through the numerical control machine, when the horn mouth appears, the reason for forming the horn mouth does not need to be found, the reason does not need to be analyzed, only the correction taper needs to be added in the numerical control program, and the machining method is simple and rapid to operate, and time and labor are saved.
Example (b):
as shown in fig. 1 to 3, the size of the turbine disk ring groove
The processing quality is unstable all the time, each batch of parts have out-of-tolerance parts, the size of the groove bottom of the processed ring groove is qualified, the size of the outlet of the ring groove is out-of-tolerance within the range of phi 145.033-phi 145.035, and the size is within the range of phi 145.05-phi 145.055. The bell mouth eliminating process comprises the following steps:
(1) clamping the parts: and (3) clamping parts according to the technological specification requirements of the II-grade turbine disk, and checking that each runout is not more than 0.01 mm.
(2) Finish machining of the ring groove: carrying out numerical control linear walking according to the design size intermediate value phi 145.02 of the ring groove, and finely machining the precise ring groove;
(3) calculating a compensation value: Δ X { (Φ 145.055+ Φ 145.05)/2- (Φ 145.035+ Φ 145.033)/2}/2 ═ 0.009 (145.0525-145.034)/2 ═ 0.009
(4) Correcting a horn mouth: changing the numerical control program, machining a slant line, wherein the diameter of the outlet of the ring groove is phi 145.02, and the diameter of the bottom of the ring groove is phi 145.029, so that the bell mouth can be corrected.
Claims (7)
1. A processing method for eliminating a horn mouth of a precise hole or a ring groove is characterized in that: the processing method comprises the following steps:
A. clamping the parts: clamping the part on a workbench of a numerical control machine tool;
B. finish machining: carrying out numerical control straight line walking according to the design size intermediate value of the hole or the ring groove, and finely machining the precise hole or the ring groove;
C. calculating a compensation value: measuring the diameter of the bottom of the hole or the bottom of the ring groove and the diameter of the hole or the outlet of the ring groove, and calculating a compensation value delta X;
D. correcting a horn mouth: the original part is detached, then the new part is clamped on a workbench of a numerical control machine, the program of the numerical control machine is changed, the oblique line is machined to form an inverted cone, and the horn mouth is corrected.
2. The method for eliminating the flare of the precision hole or the ring groove according to claim 1, wherein: and B, after the part is clamped on a workbench of the numerical control machine tool in the step A, jumping needs to be checked, and the jumping is not more than 0.01 mm.
3. The method for eliminating the flare of the precision hole or the ring groove according to claim 2, wherein: the runout includes circular runout and full runout.
4. The method for eliminating the flare of the precision hole or the ring groove according to claim 1, wherein: in the step B, the design dimension intermediate value is equal to the basic dimension + (upper deviation + lower deviation)/2.
5. The method for eliminating the flare of the precision hole or the ring groove according to claim 1, wherein: compensation value in the step C
Wherein
Is the average value of the actual diameter of the hole or ring groove outlet,
is the average value of the actual diameter of the bottom of the hole or the bottom of the ring groove.
6. The method for eliminating the flare of the precision hole or the ring groove according to claim 1, wherein: and D, when the oblique line is processed in the step D, the diameter of the outlet of the hole or the ring groove is the middle value of the design size, and the diameter of the bottom of the hole or the bottom of the ring groove is the sum of the middle value of the design size and the compensation value delta X.
7. The method for eliminating the flare of the precision hole or the ring groove according to claim 1, wherein: and D, after the step D is finished, measuring the size of the bottom of the hole or the bottom of the ring groove and whether the size of the hole or the outlet of the ring groove has out-of-tolerance or not, and then carrying out batch production.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010946400.7A CN112091542B (en) | 2020-09-10 | 2020-09-10 | Machining method for eliminating horn mouth of precise hole or ring groove |
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| CN202010946400.7A CN112091542B (en) | 2020-09-10 | 2020-09-10 | Machining method for eliminating horn mouth of precise hole or ring groove |
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| CN112091542A true CN112091542A (en) | 2020-12-18 |
| CN112091542B CN112091542B (en) | 2022-04-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935715A (en) * | 2021-01-29 | 2021-06-11 | 江南工业集团有限公司 | Machining manufacturing method for airplane wheel hub |
| CN115056087A (en) * | 2022-06-07 | 2022-09-16 | 中国航发航空科技股份有限公司 | Method for precisely machining silicon rubber inner ring groove group |
Citations (4)
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| DE4424822A1 (en) * | 1994-07-14 | 1996-01-18 | Hoffmann Kurt Gmbh & Co Kg | Precision hole production process |
| CN104400335A (en) * | 2014-10-24 | 2015-03-11 | 陕西天财工程造价咨询有限公司 | Taper sleeve processing method |
| CN104460517A (en) * | 2014-10-22 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for improving position precision of spatial holes machined through bend |
| CN109590677A (en) * | 2018-11-09 | 2019-04-09 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of processing method of profound cylinder sealing inner hole |
-
2020
- 2020-09-10 CN CN202010946400.7A patent/CN112091542B/en active Active
Patent Citations (4)
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|---|---|---|---|---|
| DE4424822A1 (en) * | 1994-07-14 | 1996-01-18 | Hoffmann Kurt Gmbh & Co Kg | Precision hole production process |
| CN104460517A (en) * | 2014-10-22 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for improving position precision of spatial holes machined through bend |
| CN104400335A (en) * | 2014-10-24 | 2015-03-11 | 陕西天财工程造价咨询有限公司 | Taper sleeve processing method |
| CN109590677A (en) * | 2018-11-09 | 2019-04-09 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of processing method of profound cylinder sealing inner hole |
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| FELIX1366560: "消除加工孔的喇叭口现象", 《百度文库》 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935715A (en) * | 2021-01-29 | 2021-06-11 | 江南工业集团有限公司 | Machining manufacturing method for airplane wheel hub |
| CN112935715B (en) * | 2021-01-29 | 2022-03-29 | 江南工业集团有限公司 | Machining manufacturing method for airplane wheel hub |
| CN115056087A (en) * | 2022-06-07 | 2022-09-16 | 中国航发航空科技股份有限公司 | Method for precisely machining silicon rubber inner ring groove group |
| CN115056087B (en) * | 2022-06-07 | 2023-07-18 | 中国航发航空科技股份有限公司 | Method for precisely machining silicon rubber inner ring groove group |
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