CN111036950B - Precision turning fixture for thin-wall conical part - Google Patents
Precision turning fixture for thin-wall conical part Download PDFInfo
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- CN111036950B CN111036950B CN201911367017.XA CN201911367017A CN111036950B CN 111036950 B CN111036950 B CN 111036950B CN 201911367017 A CN201911367017 A CN 201911367017A CN 111036950 B CN111036950 B CN 111036950B
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- mandrel
- conical surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
- B23B31/404—Gripping the work or tool by jaws moving radially controlled by conical surfaces
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Abstract
The precision turning fixture for the thin-wall conical surface part comprises an expansion mandrel and a fastening piece, wherein the front part of the outer surface of the expansion mandrel is provided with an outer conical surface of the mandrel matched with the inner conical surface of the thin-wall workpiece, the middle part of the outer surface of the expansion mandrel forms a mandrel positioning excircle matched with the inner hole of the thin-wall workpiece, the center of the expansion mandrel is provided with a mandrel inner hole, the front end of the mandrel inner hole is provided with a mandrel internal thread, the rear end of the mandrel inner hole is provided with an inner conical surface of the mandrel, and the circumference of the rear part of the expansion mandrel; the front end of the fastening piece is provided with a fastening external thread matched and screwed with the internal thread of the mandrel of the expansion mandrel, and the rear part of the fastening external thread is provided with a fastening external conical surface contacted with the internal conical surface of the mandrel. According to the invention, the expansion mandrel is adopted, the fastener is manually screwed in to expand the workpiece, the conical surface is attached to the conical surface of the workpiece for clamping, the rigidity of the thin-wall part is increased, the deformation of the thin-wall part caused by clamping and in the machining process is avoided, the machining precision of the part is improved, the structure is simple, and the clamping is convenient.
Description
Technical Field
The invention belongs to the technical field of clamps, and particularly relates to a precision turning clamp for a thin-wall conical part.
Background
At present, for the processing of thin-wall parts, because the wall of the thin-wall part is very thin and the rigidity is poor, the thin-wall part is easy to deform in the processing process, thereby easily influencing the processing precision. For conical surface parts with thin wall thickness, the structure is complex, the requirement on the processing precision of the parts is high, during processing, the cutting force is easy to cause the deformation of the workpiece, the conditions of uneven conical surface thickness and the like are generated, and the qualification rate of the parts is low. There is therefore a need for improvements.
Disclosure of Invention
The technical problems solved by the invention are as follows: the invention provides a precision turning clamp for a thin-wall conical surface part, which adopts an expansion core shaft, manually screws a fastener to expand a workpiece, and clamps the workpiece by attaching the conical surface to the conical surface of the workpiece, thereby increasing the rigidity of the thin-wall part, avoiding the deformation of the thin-wall part caused by cutting force when the thin-wall part is clamped and in the processing process, improving the processing precision of the part, having simple structure, convenient clamping, short manufacturing period and easy realization, and effectively solving the problem of precision turning of the thin-wall conical surface part.
The technical scheme adopted by the invention is as follows: the precision turning fixture for the thin-wall conical surface part comprises an expansion mandrel and a fastening piece, wherein the front part of the outer surface of the expansion mandrel is provided with an outer conical surface of the mandrel matched with the inner conical surface of the thin-wall workpiece, the middle part of the outer surface of the expansion mandrel forms a mandrel positioning excircle matched with the inner hole of the thin-wall workpiece, the center of the expansion mandrel is provided with a mandrel inner hole, the front end of the mandrel inner hole is provided with a mandrel internal thread, the rear end of the mandrel inner hole is provided with an inner conical surface of the mandrel, and the circumference of the rear part of the expansion mandrel is uniformly provided; the front end of the fastener is provided with a fastening external thread matched and screwed with the internal thread of the mandrel of the expansion mandrel, and the rear part of the fastening external thread is provided with a fastening external conical surface which is contacted with the internal conical surface of the mandrel of the expansion mandrel to enable the expansion mandrel to expand the thin-walled workpiece.
In a preferred mode of the technical scheme, the axial length of the outer conical surface of the mandrel of the expansion mandrel is 0.2mm shorter than the length of the inner conical surface of the workpiece of the thin-wall workpiece, and the taper of the outer conical surface of the mandrel is equal to that of the inner conical surface of the workpiece; the axial length of the expansion slot is smaller than that of the positioning excircle of the mandrel; the outer surface of the rear part of the expansion mandrel is designed into a square structure, and the axial length of the square structure is larger than the thickness of the wrench opening.
In a preferable mode of the technical scheme, the nominal diameter of the fastening external thread on the fastener is equal to the nominal diameter of the internal thread of the mandrel of the expansion mandrel; the axial length of a fastening outer conical surface on the fastening piece is greater than that of a mandrel inner conical surface of the expansion mandrel, and the taper of the fastening outer conical surface is equal to that of the mandrel inner conical surface; and a knurled cylindrical surface is arranged at the rear part of the fastening outer conical surface.
In an optimal mode of the technical scheme, the expansion mandrel is made of bronze materials, and the fastening piece is made of 45# steel materials.
Compared with the prior art, the invention has the advantages that:
1. the scheme has the advantages that the expansion mandrel is adopted, the fastener is manually screwed in to expand a workpiece, the conical surface and the conical surface of the workpiece are attached and clamped, the rigidity of the thin-wall part is increased, the deformation caused by cutting force during the process of clamping and machining the thin-wall part is avoided, the machining precision of the part is improved, the structure is simple, the clamping is convenient, the manufacturing period is short, the realization is easy, and the difficult problem of precise turning of the thin-wall conical surface part can be effectively solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the expansion mandrel of the present invention;
FIG. 3 is a right side view of the construction of the expansion mandrel of the present invention;
FIG. 4 is a schematic perspective view of the expanding mandrel of the present invention;
FIG. 5 is a schematic view of the construction of the fastener of the present invention;
FIG. 6 is a schematic view of the structure of a thin-walled workpiece according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one.. said element does not exclude the presence of other like elements in the process, method, article or apparatus that comprises the element.
Referring to fig. 1-6, embodiments of the present invention are described,
example 1: a precision turning anchor clamps for thin wall conical surface part is including bloated tight dabber 1 and fastener 2, bloated tight dabber 1 adopts the bronze material to make, fastener 2 adopts 45# steel material to make.
As shown in fig. 2, 3 and 4, the front part of the outer surface of the expansion mandrel 1 is provided with a mandrel outer conical surface 103 matched with the workpiece inner conical surface 301 of the thin-walled workpiece 3, the axial length of the mandrel outer conical surface 103 of the expansion mandrel 1 is 0.2mm shorter than the length of the workpiece inner conical surface 301 of the thin-walled workpiece 3, and the taper of the mandrel outer conical surface 103 is equal to that of the workpiece inner conical surface 301; a mandrel positioning excircle 104 matched with an inner hole 302 of the thin-wall workpiece 3 is formed in the middle of the outer surface of the expansion mandrel 1, a mandrel inner hole 101 is formed in the center of the expansion mandrel 1, a mandrel inner thread 102 is arranged at the front end of the mandrel inner hole 101, a mandrel inner conical surface 105 is arranged at the rear end of the mandrel inner hole 101, a plurality of expansion slots 107 are uniformly formed in the circumference of the rear part of the expansion mandrel 1, and the axial length of each expansion slot 107 is smaller than that of the mandrel positioning excircle 104; the outer surface of the rear part of the expansion mandrel 1 is designed into a square structure 106, and the axial length of the square structure 106 is larger than the thickness of a wrench opening.
As shown in fig. 5, the front end of the fastening member 2 is provided with a fastening external thread 201 which is adapted to and screwed with the mandrel internal thread 102 of the expansion mandrel 1, and the nominal diameter of the fastening external thread 201 on the fastening member 2 is equal to the nominal diameter of the mandrel internal thread 102 of the expansion mandrel 1; the rear part of the fastening external thread 201 is provided with a fastening external conical surface 202 which is contacted with the mandrel internal conical surface 105 of the expansion mandrel 1 to enable the expansion mandrel 1 to expand the thin-wall workpiece 3, the axial length of the fastening external conical surface 202 on the fastening piece 2 is greater than that of the mandrel internal conical surface 105 of the expansion mandrel 1, and the taper of the fastening external conical surface 202 is equal to that of the mandrel internal conical surface 105; and a knurled cylindrical surface 203 is arranged at the rear part of the fastening outer conical surface 202 and is used for manual screwing.
When the precision turning fixture for the thin-wall workpiece 3 is installed, as shown in fig. 1, the outer circle of the left end of a blank of the thin-wall workpiece 3 is clamped by three claws of a lathe or a spring chuck, the thin-wall workpiece 3 is clamped on the lathe, an inner conical surface 301 and an inner hole 302 of the workpiece are finely turned, a mandrel positioning outer circle 104 and a mandrel outer conical surface 103 of the expanding mandrel 1 are in contact positioning with the inner hole 302 and the inner conical surface 301 of the workpiece on the thin-wall workpiece 3, the fastening part 2 is manually screwed in, a fastening external thread 201 on the fastening part 2 is screwed in a mandrel internal thread 102 of the expanding mandrel 1 until the fastening external conical surface 202 is in contact with the mandrel inner conical surface 105. And (3) finely turning the outer circle and the outer conical surface of the thin-wall workpiece 3 to the size of the workpiece, and cutting off the workpiece, wherein the thickness of the cutting edge of the cutting-off tool is very thin and the cutting edge is sharp.
Example 2: a precision turning anchor clamps for thin wall conical surface part is including tight dabber 1 and fastener 2 of expanding. The taper angle of the workpiece inner conical surface 301 of the thin-wall workpiece 3 is 90 degrees, the wall thickness of the conical surface is 0.2, the wall thickness of the outer circle is 0.4, the length of the workpiece inner conical surface 301 is 7.2, and the total length of the workpiece inner conical surface is 11.5.
Clamping one end of a rough-machined blank of a thin-wall workpiece 3 by three claws, finely machining the inner conical surface 301 and the inner hole 302 of the workpiece at the other end of the thin-wall workpiece 3 to the size, positioning the mandrel positioning excircle 104 and the mandrel outer conical surface 103 of the expansion mandrel 1 in contact with the inner hole 302 and the workpiece inner conical surface 301 on the thin-wall workpiece 3, and setting the gap between the mandrel positioning excircle 104 and the inner hole 302 of the expansion mandrel 1 to be 0.01-0.03; the length of the mandrel outer conical surface 103 is 7.2-0.2, the taper angle is 90 degrees, the mandrel inner conical surface 105 is arranged at the other end of the mandrel outer conical surface, the taper angle is 60 degrees, the right end of the mandrel positioning outer circle 104 is of a square structure, four expansion slots 107 are arranged, and the width b of each expansion slot 107 is 2. The wrench is clamped at the square structural surface, the fastener 2 is manually screwed in, the fastening external thread 201 on the fastener 2 is screwed into the mandrel internal thread 102 until the fastening external conical surface 202 is contacted with the mandrel internal conical surface 105, and the workpiece is expanded. And (3) finely turning the outer circle and the outer conical surface of the thin-wall workpiece 3 to the size of the workpiece, and cutting off the workpiece, wherein the thickness of the cutting edge of the cutting-off tool is very thin and the cutting edge is sharp. The wrench is clamped at the main square structure, the fastener 2 is manually unscrewed, and the thin-wall workpiece 3 is removed.
According to the invention, the expansion core shaft 1 is adopted, the fastener 2 is manually screwed in to expand the workpiece, the conical surface is attached to the conical surface of the workpiece for clamping, the rigidity of the thin-wall part is increased, the deformation of the thin-wall part caused by cutting force when the thin-wall part is clamped and in the machining process is avoided, the machining precision of the part is improved, the structure is simple, the clamping is convenient, the manufacturing period is short, the realization is easy, and the problem of precise turning of the thin-wall conical part can be effectively solved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A accurate turning anchor clamps for thin wall conical surface part, its characterized in that: the expansion mandrel comprises an expansion mandrel (1) and a fastener (2), wherein the front part of the outer surface of the expansion mandrel (1) is provided with an outer mandrel conical surface (103) matched with a workpiece inner conical surface (301) of a thin-wall workpiece (3), the middle part of the outer surface of the expansion mandrel (1) forms a mandrel positioning excircle (104) matched with an inner hole (302) of the thin-wall workpiece (3), the center of the expansion mandrel (1) is provided with a mandrel inner hole (101), the front end of the mandrel inner hole (101) is provided with a mandrel inner thread (102), the rear end of the mandrel inner hole (101) is provided with an inner mandrel conical surface (105), and the circumference of the rear part of the expansion mandrel (1) is uniformly provided with a plurality of expansion slots; the front end of the fastener (2) is provided with a fastening external thread (201) which is matched and screwed with the mandrel internal thread (102) of the expansion mandrel (1), and the rear part of the fastening external thread (201) is provided with a fastening external conical surface (202) which is contacted with the mandrel internal conical surface (105) of the expansion mandrel (1) to enable the expansion mandrel (1) to expand the thin-walled workpiece (3); the axial length of the mandrel outer conical surface (103) of the expansion mandrel (1) is 0.2mm shorter than that of the workpiece inner conical surface (301) of the thin-wall workpiece (3), and the taper of the mandrel outer conical surface (103) is equal to that of the workpiece inner conical surface (301).
2. The precision turning fixture for thin-walled conical parts of claim 1, wherein: the axial length of the expansion slot (107) is less than that of the mandrel positioning excircle (104); the outer surface of the rear part of the expansion mandrel (1) is designed into a square structure (106), and the axial length of the square structure (106) is larger than the thickness of a wrench opening.
3. The precision turning fixture for thin-walled conical parts of claim 2, wherein: the nominal diameter of a fastening external thread (201) on the fastening piece (2) is equal to the nominal diameter of a mandrel internal thread (102) of the expansion mandrel (1); the axial length of a fastening outer conical surface (202) on the fastening piece (2) is greater than that of a mandrel inner conical surface (105) of the expansion mandrel (1), and the taper of the fastening outer conical surface (202) is equal to that of the mandrel inner conical surface (105); and a knurled cylindrical surface (203) is arranged at the rear part of the fastening outer conical surface (202).
4. The precision turning fixture for thin-walled conical parts of claim 3, wherein: the expansion mandrel (1) is made of bronze materials, and the fastening piece (2) is made of 45# steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911367017.XA CN111036950B (en) | 2019-12-26 | 2019-12-26 | Precision turning fixture for thin-wall conical part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911367017.XA CN111036950B (en) | 2019-12-26 | 2019-12-26 | Precision turning fixture for thin-wall conical part |
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| Publication Number | Publication Date |
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| CN111036950A CN111036950A (en) | 2020-04-21 |
| CN111036950B true CN111036950B (en) | 2021-06-18 |
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| CN201911367017.XA Active CN111036950B (en) | 2019-12-26 | 2019-12-26 | Precision turning fixture for thin-wall conical part |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902791B (en) * | 2021-03-05 | 2023-01-31 | 湖北旭扬工贸有限公司 | Thin-wall precision positioning device for detection |
| CN115213704A (en) * | 2021-04-21 | 2022-10-21 | 航天科工惯性技术有限公司 | Adjustable lining device for machining thin-wall parts and machining method based on adjustable lining device |
| CN113199396A (en) * | 2021-05-12 | 2021-08-03 | 自贡硬质合金有限责任公司 | Clamping tool and method for grinding outer conical surface of product |
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| CN207746431U (en) * | 2017-12-15 | 2018-08-21 | 重庆市旺成科技股份有限公司 | A kind of lathe and its truning fixture |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20314255U1 (en) * | 2003-09-13 | 2003-11-06 | Isad Electronic Sys Gmbh & Co | Rapid clamping chuck for spinning thin workpieces has a threaded fastener with two interacting tapering thrust sleeves to grip the inside of the mounting aperture of the workpiece |
| CN201931105U (en) * | 2010-12-17 | 2011-08-17 | 山东济宁特力机床有限公司 | Taper sleeve expander fixture of numerical-control lathe |
| CN203184684U (en) * | 2013-03-07 | 2013-09-11 | 连云港职业技术学院 | Numerical control lathe fixture of thin-wall barrel-shaped workpiece |
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| CN111036950A (en) | 2020-04-21 |
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Effective date of registration: 20221230 Address after: 224395 South of North 3rd Ring Road, east of Fujian Road, Sheyang Economic Development Zone, Yancheng City, Jiangsu Province Patentee after: Yancheng Keyi Communication Technology Co.,Ltd. Address before: 721006 No. 70 Qing Jiang Road, Shaanxi, Baoji Patentee before: SHAANXI BAOCHENG AVIATION INSTRUMENT Co.,Ltd. |
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