CN112643104A - Numerical control milling tool and method for cantilever thin-wall structure - Google Patents
Numerical control milling tool and method for cantilever thin-wall structureDownload PDFInfo
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- CN112643104A CN112643104ACN202011541489.5ACN202011541489ACN112643104ACN 112643104 ACN112643104 ACN 112643104ACN 202011541489 ACN202011541489 ACN 202011541489ACN 112643104 ACN112643104 ACN 112643104A
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- numerical control
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- 238000003801millingMethods0.000titleclaimsabstractdescription21
- 238000000034methodMethods0.000titleclaimsabstractdescription17
- 230000008569processEffects0.000claimsabstractdescription9
- 238000003754machiningMethods0.000claimsdescription38
- 238000001816coolingMethods0.000claimsdescription3
- 239000000110cooling liquidSubstances0.000claimsdescription3
- 238000007730finishing processMethods0.000claimsdescription3
- 239000000463materialSubstances0.000claimsdescription3
- 230000007704transitionEffects0.000claimsdescription3
- 238000003672processing methodMethods0.000abstract1
- 238000009763wire-cut EDMMethods0.000description3
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- 238000010586diagramMethods0.000description1
- 230000006872improvementEffects0.000description1
- 230000004048modificationEffects0.000description1
- 238000012986modificationMethods0.000description1
- 238000012797qualificationMethods0.000description1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- 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
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- Engineering & Computer Science (AREA)
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Abstract
Description
Technical Field
The invention belongs to the technical field of machinery, and particularly relates to a numerical control milling tool and a numerical control milling method for a cantilever thin-wall structure, wherein one end of the tool is a multi-cantilever thin-wall structure shaft part.
Background
At present, in the field of machining, after inner holes and outer circles are machined mostly by a machining method of a cantilever thin-wall structure with a multi-cantilever thin-wall structure shaft part at one end, redundant parts are removed by adopting a wire cut electrical discharge machining mode to machine a symmetrical cantilever thin-wall structure.
However, wire cut electrical discharge machining is only suitable for machining symmetrical cantilever structures, and the cantilever thin-wall structure is easy to deform in the machining process to cause product rejection, so that the asymmetrical structure cannot be machined in such a way.
Disclosure of Invention
In view of this, the present invention provides a numerical control milling tool and a numerical control milling method for a cantilever thin-wall structure, which can overcome the defects of the prior art.
The purpose of the invention is realized by the following technical scheme:
a numerical control milling tool for a cantilever thin-wall structure comprises a numerical control milling center, a fourth shaft three-jaw chuck, a tool structure, a dial indicator and a processing cutter, wherein the fourth shaft three-jaw chuck, the tool structure, the dial indicator and the processing cutter are arranged in the numerical control milling center; the fourth shaft three-jaw chuck is fixed on one side of a working platform of the numerical control milling center; the tool structure can be clamped by a fourth shaft three-jaw chuck; the numerical control milling center is also provided with a dial indicator on the upper side of the tool structure.
Further, the tool structure comprises a mandrel, a spring jackscrew, a gasket and a bolt; the mandrel of the tool structure comprises a thick section excircle and a thin section excircle, and is in a step shape.
Furthermore, a platform parallel to the axis of the mandrel is arranged on the excircle of the thick section, and the size of the platform is at least 8 multiplied by 8.
Furthermore, a circumferential annular groove is formed in the transition position of the excircle of the thick section and the excircle of the thin section of the mandrel, n through grooves perpendicular to the circumferential direction are formed in the annular groove, and the number of n depends on the number of cantilever structures to be machined.
Furthermore, n threaded holes are formed in the position, corresponding to the side wall of the through groove, of the outer circle of the thick section of the mandrel, the threaded part of the spring jackscrew is matched with the threaded holes in the outer circle of the thick section of the mandrel, and the spring part of the spring jackscrew can obviously absorb vibration in the machining process; the threaded part of the bolt is matched with the threaded hole at the top of the thin section of the mandrel.
Furthermore, the excircle size of the thin section of the mandrel is slightly smaller than the inner hole of the part by about 0.05mm according to the size of the inner hole of the part, and the length of the thin section of the mandrel is slightly shorter than the total length of the workpiece by 1mm
Furthermore, a threaded hole is formed in the center of the top of the thin section of the mandrel, and the threaded hole is chamfered by 60 degrees.
Furthermore, a centre clamping mode can be selected to replace the axial direction of the gasket and the bolt for clamping the workpiece.
In addition, the invention also provides a numerical control milling method for the cantilever thin-wall structure, which comprises the following steps of;
firstly, processing and finishing the excircle, the end face and the inner hole of a workpiece to be processed according to a conventional process;
secondly, mounting the core rod thick section of the machining tool on a three-jaw chuck of a numerical control milling center, and aligning a platform plane on the core rod thick section;
step three, sleeving the workpiece into the thin section of the mandrel, and fastening the axial direction of the workpiece by using a gasket and a bolt;
step four, screwing in a spring jack screw to fix the radial direction of the workpiece;
and step five, establishing a workpiece machining origin. Including x, y, z coordinate values and a quadax-axis coordinate values.
Step six, selecting a machining tool and machining parameters according to the overall dimension and material convention of the workpiece;
and seventhly, processing the cantilever thin-wall structure at each position by a numerical control milling center cutter and combining the rotation of the three-jaw chuck.
Further, in the second step, the three-jaw chuck is operated to rotate, and a dial indicator is combined with the movement of the numerical control milling center platform to align the platform plane on the thick section of the mandrel.
Furthermore, in the fourth step, the spring jack screw is screwed into the limit position and then loosened for 2 circles, so that the spring in the spring jack screw can absorb part of machining vibration, and the problem that the workpiece is not clamped enough in a radial method due to the machining vibration is avoided.
Further, in the seventh step, rough machining, semi-finishing and finishing processes are included, and cooling is performed by using cooling liquid.
Has the advantages that:
(1) the tool disclosed by the invention is simple and practical in structure, simple and convenient in machining method and easy to operate, can replace a wire cut electrical discharge machining mode to complete machining of the cantilever structure of the shaft part with the symmetrical cantilever thin-wall structure at one end, obviously improves the qualification rate of product machining, and can also complete machining of the cantilever structure of the shaft part with the asymmetrical cantilever thin-wall structure at one end.
(2) The device has high processing efficiency, can effectively save time and processing cost, and has better economical efficiency.
(3) The processing process is not easy to deform, and the symmetry and the circumferential precision are better ensured.
Drawings
FIG. 1 is a schematic diagram of the operation of the present invention;
FIG. 2 is a schematic view of the workpiece clamping condition of the present invention;
FIG. 3 is an exploded view of the tooling structure of the present invention;
FIG. 4 is a schematic representation of the profile of one product processed according to the invention;
FIG. 5 is a schematic view of a mandrel structure of the tool of the present invention;
wherein, 1, processing a cutter; 2-a numerical control milling center; 3-three-jaw chuck; 4, tooling structure; 5, a workpiece; 6-dial indicator; 401-mandrel; 402-spring jack screw; 403-a gasket; 404-bolt.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
A numerical control milling tool with a cantilever thin-wall structure and one end being a multi-cantilever thin-wall structure shaft part comprises a numericalcontrol milling center 2, a fourth-shaft three-jaw chuck 3, atool structure 4, adial indicator 6 and aprocessing cutter 1, wherein the fourth-shaft three-jaw chuck 3, thetool structure 4, thedial indicator 6 and the processing cutter are arranged inside the numericalcontrol milling center 2; the fourth shaft three-jaw chuck 3 is fixed on one side of a working platform of the numericalcontrol milling center 2; thetool structure 4 can be clamped by the fourth shaft three-jaw chuck 3; the numericalcontrol milling center 2 is also provided with adial indicator 6 on the upper side of thetool structure 4.
The tool structure comprises amandrel 401, aspring top thread 402, agasket 403 and abolt 404; themandrel 401 of the tool structure comprises a thick section excircle and a thin section excircle, and themandrel 401 is in a step shape.
A platform parallel to the axis of the mandrel is arranged on the excircle of the thick section, and the size of the platform is at least 8 multiplied by 8; the transition part of the excircle of the thick section and the excircle of the thin section of the mandrel is provided with a circumferential ring groove, the ring groove is provided with n grooves vertical to the circumferential direction, and the number of the n depends on the number of cantilever structures to be processed.
N threaded holes are formed in the position, corresponding to the side wall of the through groove, of the outer circle of the thick section of the mandrel, the threaded part of the spring jackscrew is matched with the threaded holes in the outer circle of the thick section of the mandrel, and the spring part of the spring jackscrew can obviously absorb vibration in the machining process; the threaded part of the bolt is matched with the threaded hole at the top of the thin section of the mandrel.
The excircle size of the thin section of themandrel 401 is slightly smaller than the inner hole of the part by about 0.05mm according to the size of the inner hole of the part, and the length of the thin section of the mandrel is slightly shorter than the total length of theworkpiece 5 by 1 mm;
the central position of the top of the thin section of themandrel 401 is provided with a threaded hole, and the threaded hole is chamfered by 60 degrees.
The threaded part of thespring top thread 402 is matched with a threaded hole on the outer circle of the thick section of themandrel 401, and the spring part of thespring top thread 402 can obviously absorb vibration in the machining process;
the threaded portion ofbolt 404 mates with a threaded hole in the top of thecore 401 segment.
The method for processing the workpiece by utilizing the numerical control milling device of the cantilever thin-wall structure comprises the following steps;
firstly, processing and finishing the excircle, the end face and the inner hole of a part to be processed according to a conventional process;
secondly, mounting the rough section of the core rod of the machining tool on a three-jaw chuck 3 of a numerical control milling center, and aligning a platform plane on the rough section of the core rod;
step three, sleeving theworkpiece 5 into the thin section of themandrel 401, and fastening the axial direction of theworkpiece 5 by using agasket 403 and a bolt 405;
step four, screwing in thespring jack 402 to fix the radial direction of theworkpiece 5;
and step five, establishing a workpiece machining origin. Including x, y, z coordinate values and a quadax-axis coordinate values.
Step six, selecting a machining tool and machining parameters according to the outline dimension and the material convention of theworkpiece 5;
and seventhly, machining the cantilever thin-wall structure at each position by a cutter of the numericalcontrol milling center 2 and combining the rotation of the three-jaw chuck 3.
In the second step, operating the three-jaw chuck to rotate and using adial indicator 5 to align the platform plane on the thick section of the mandrel by combining the movement of the platform of the numericalcontrol milling center 2;
in the fourth step, thespring jack 402 is screwed into the limit position and then loosened for 2 circles, so that the spring in the spring jack can absorb part of the machining vibration, and the problem that the workpiece is not clamped enough in the radial direction due to the machining vibration is avoided;
and step seven, including rough machining, semi-finishing and finishing processes, cooling by using cooling liquid.
As a priority scheme, due to the structural characteristics of the workpiece, the axial direction of the workpiece cannot be fastened by adopting thegasket 403 and thebolt 404, and the axial direction of the workpiece can be clamped by adopting a tip;
as a priority scheme, when the total length of the workpiece is too long, so that the vibration of the tool is too large to meet the machining requirement in the process of overlong machining, centre clamping can be adopted to replace a gasket and a bolt to clamp the axial direction of the workpiece.
In summary, the above description is only a preferred example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a cantilever thin wall structure numerical control mills processing frock which characterized in that: the machining tool comprises a numerical control milling machining center, a fourth shaft three-jaw chuck, a tool structure, a dial indicator and a machining tool, wherein the fourth shaft three-jaw chuck is arranged in the numerical control milling machining center; the fourth shaft three-jaw chuck is fixed on one side of a working platform of the numerical control milling center; the tool structure can be clamped by a fourth shaft three-jaw chuck; the numerical control milling center is also provided with a dial indicator on the upper side of the tool structure.
2. The numerical control milling tool for the cantilever thin-wall structure according to claim 1, characterized in that: the tool structure comprises a mandrel, a spring jackscrew, a gasket and a bolt; the mandrel of the tool structure comprises a thick section of excircle and a thin section of excircle, and is in a step shape; the central position of the top of the core shaft thin section is provided with a threaded hole, and the threaded hole is chamfered by 60 degrees.
3. The numerical control milling tool for the cantilever thin-wall structure according to claim 2, characterized in that: the excircle of the thick section is provided with a platform which is parallel to the axis of the mandrel, and the size of the platform is at least 8 multiplied by 8.
4. The numerical control milling tool for the cantilever thin-wall structure according to claim 2, characterized in that: a circumferential annular groove is formed at the transition position of the excircle of the thick section and the excircle of the thin section of the mandrel, and a plurality of through grooves vertical to the circumferential direction are formed in the annular groove; the side wall position corresponding to the through groove is provided with a plurality of threaded holes, the threaded part of the spring jackscrew is matched with the threaded hole on the excircle of the thick section of the mandrel, and the threaded part of the bolt is matched with the threaded hole on the top of the thin section of the mandrel.
5. The numerical control milling tool for the cantilever thin-wall structure according to claim 2, characterized in that: the size of the excircle of the thin section of the mandrel is slightly smaller than the size of the inner hole of the part by about 0.05mm according to the size of the inner hole of the part, and the length of the thin section of the mandrel is slightly shorter than the total length of the workpiece by 1 mm.
6. The numerical control milling tool for the cantilever thin-wall structure according to claim 2, characterized in that: the center clamping mode can be selected to replace the axial direction of the gasket and the bolt clamping workpiece.
7. A machining method of the numerical control milling tool for the cantilever thin-wall structure is characterized by comprising the following steps of: comprises the following steps;
firstly, processing and finishing the excircle, the end face and the inner hole of a workpiece to be processed according to a conventional process;
secondly, mounting the core rod thick section of the machining tool on a three-jaw chuck of a numerical control milling center, and aligning a platform plane on the core rod thick section;
step three, sleeving the workpiece into the thin section of the mandrel, and fastening the axial direction of the workpiece by using a gasket and a bolt;
step four, screwing in a spring jack screw to fix the radial direction of the workpiece;
and step five, establishing a workpiece machining origin. Including x, y, z coordinate values and a quadax-axis coordinate values.
Step six, selecting a machining tool and machining parameters according to the overall dimension and material convention of the workpiece;
and seventhly, processing the cantilever thin-wall structure at each position by a numerical control milling center cutter and combining the rotation of the three-jaw chuck.
8. The process of claim 7, wherein: and in the second step, operating the three-jaw chuck to rotate, and using a dial indicator to combine with the movement of the numerical control milling center platform to align the platform plane on the thick section of the mandrel.
9. The process of claim 7, wherein: in the fourth step, the spring jack screw is screwed into the limit position and then loosened for 2 circles, so that the spring in the spring jack screw can absorb part of machining vibration, and the problem that the workpiece is not clamped enough in a radial method due to the machining vibration is avoided.
10. The process of claim 7, wherein: and in the seventh step, rough machining, semi-finishing and finishing processes are included, and cooling is performed by using cooling liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011541489.5ACN112643104A (en) | 2020-12-23 | 2020-12-23 | Numerical control milling tool and method for cantilever thin-wall structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011541489.5ACN112643104A (en) | 2020-12-23 | 2020-12-23 | Numerical control milling tool and method for cantilever thin-wall structure |
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| CN112643104Atrue CN112643104A (en) | 2021-04-13 |
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| CN202011541489.5APendingCN112643104A (en) | 2020-12-23 | 2020-12-23 | Numerical control milling tool and method for cantilever thin-wall structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116174779A (en)* | 2022-09-08 | 2023-05-30 | 大连长丰实业总公司 | Numerical control milling method for thin-wall long-cylinder multi-petal claw-shaped part |
| CN116551323A (en)* | 2023-05-19 | 2023-08-08 | 中钢集团西安重机有限公司 | Manufacturing method and tooling of a thin-wall fan-shaped arc plate structure locking plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2923759A1 (en)* | 1978-06-12 | 1979-12-13 | Osrodek Badawczo Rozwojowy Prz | Method of milling transverse slots in nuts - uses ring of cutters rotating around turntable which supports nuts |
| CN102873387A (en)* | 2012-09-14 | 2013-01-16 | 河南平高电气股份有限公司 | Groove milling method for conductive contact finger and groove milling die special for implementing method |
| CN107414100A (en)* | 2017-07-31 | 2017-12-01 | 新兴能源装备股份有限公司 | The turning tool and processing method of a kind of thin-walled cylindrical workpiece |
| CN209736664U (en)* | 2019-01-21 | 2019-12-06 | 江苏恒才液压机械制造有限公司 | Novel thin-wall long and thin cylinder tube machining process tool |
| CN110653646A (en)* | 2019-09-30 | 2020-01-07 | 山西江淮重工有限责任公司 | Clamping tool and clamping method for turning outer circles at two ends of large-diameter thin-wall long cylindrical part |
- 2020
- 2020-12-23CNCN202011541489.5Apatent/CN112643104A/enactivePending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2923759A1 (en)* | 1978-06-12 | 1979-12-13 | Osrodek Badawczo Rozwojowy Prz | Method of milling transverse slots in nuts - uses ring of cutters rotating around turntable which supports nuts |
| CN102873387A (en)* | 2012-09-14 | 2013-01-16 | 河南平高电气股份有限公司 | Groove milling method for conductive contact finger and groove milling die special for implementing method |
| CN107414100A (en)* | 2017-07-31 | 2017-12-01 | 新兴能源装备股份有限公司 | The turning tool and processing method of a kind of thin-walled cylindrical workpiece |
| CN209736664U (en)* | 2019-01-21 | 2019-12-06 | 江苏恒才液压机械制造有限公司 | Novel thin-wall long and thin cylinder tube machining process tool |
| CN110653646A (en)* | 2019-09-30 | 2020-01-07 | 山西江淮重工有限责任公司 | Clamping tool and clamping method for turning outer circles at two ends of large-diameter thin-wall long cylindrical part |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116174779A (en)* | 2022-09-08 | 2023-05-30 | 大连长丰实业总公司 | Numerical control milling method for thin-wall long-cylinder multi-petal claw-shaped part |
| CN116551323A (en)* | 2023-05-19 | 2023-08-08 | 中钢集团西安重机有限公司 | Manufacturing method and tooling of a thin-wall fan-shaped arc plate structure locking plate |
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