CN109676171B - Inner hole mechanical tensioning device - Google Patents
Inner hole mechanical tensioning device Download PDFInfo
- Publication number
- CN109676171B CN109676171B CN201910039352.0A CN201910039352A CN109676171B CN 109676171 B CN109676171 B CN 109676171B CN 201910039352 A CN201910039352 A CN 201910039352A CN 109676171 B CN109676171 B CN 109676171B
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- Prior art keywords
- tensioning
- sleeve
- mandrel
- face
- inner hole
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- 125000006850 spacer group Chemical group 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 5
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 16
- 238000003754 machining Methods 0.000 abstract description 2
- 238000005056 compaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
Abstract
The invention belongs to the field of aviation machining process equipment, and relates to an inner hole mechanical tensioning device. The device comprises a main shaft flange, a tensioning mandrel, an end face positioning sleeve, a tensioning sleeve, a guiding tensioning sleeve, a spacer bush, a gasket and a locking nut. One end of the spindle flange is positioned in an inner hole of a spindle of the machine tool, and the other end of the spindle flange is connected with the tensioning mandrel; the end face positioning sleeve is sleeved on the tensioning mandrel and is used for positioning the end face of the product; the tensioning sleeve, the spacer bush, the guide tensioning sleeve, the gasket and the locking nut are sleeved on the tensioning mandrel in sequence; the tensioning sleeve and the guide tensioning sleeve are of thin-wall ring groove structures, and tensioning force is generated on the product through micro deformation; the outer circle size of the spacer bush is smaller than the inner hole size of the product; the gasket is used for isolating the guide tensioning sleeve and the locking nut so as to prevent the guide tensioning sleeve from being damaged; the locking nut is in threaded connection with the tensioning mandrel, and a formed thread pair provides pressure. The invention realizes the positioning and compaction of the special-shaped product with the hole characteristic, and the processing surface is completely opened, so that the first-order processing rate is improved.
Description
Technical Field
The invention belongs to the field of aviation machining process equipment, and relates to an inner hole mechanical tensioning device.
Background
In the field of aero-mechanical processing, both military and civilian aircraft, there are a large number of profiled parts with hole features. The appearance of the parts is complex, the processing manufacturability is poor, the final size requirement is difficult to ensure, and the qualification rate is low. However, the design reference and the processing reference of most products are hole elements, and a new solution is provided for us along with the massive application of various multi-functional numerical control compound machine tools.
The conventional fixture matched with the conventional machine tool is a set of fixture in one process, so that the provided positioning and compacting positions are more, and only the positioning and compacting elements are non-processing surfaces. However, a plurality of working procedures are needed for finishing the processing of one product, and the positioning reference and the processing reference of each working procedure are difficult to unify, so that the reference misalignment error is larger; the multi-process processing requires a plurality of sets of clamps to assist production, so that the preparation time is too long, the efficiency is low, and the cost of the plurality of sets of clamps is high, so that the economy is poor.
Along with the development of the numerical control machine tool, various multifunctional compound machine tools are widely applied. Such as a turning and milling compound numerical control machine is typical. Such machines are typically capable of completing 70% -100% of the process in sequence; and the design reference is overlapped with the processing reference, so that the processing precision is improved. However, with the application of various advanced machine tools, conventional jigs have not been able to match perfectly. To machine more features in a sequence requires that the surface of the product to be machined be fully open, and does not allow for placement of the platens, which would have to be clamped with the bores in place.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides an inner hole mechanical tensioning device, and a main shaft flange is designed according to a connecting interface of a main shaft of a machine tool; clamping a special-shaped product with a hole characteristic on an inner hole mechanical tensioning device, wherein a locking nut is arranged on a mandrel; the nut locking force is transmitted to the tensioning sleeve to enable the tensioning sleeve to be compressed and deformed to radially tension; the inner hole and the outer circle of the tensioning sleeve are both provided with precision, so that the product is positioned and tensioned on the device.
The technical scheme of the invention is as follows:
an inner hole mechanical tensioning device comprises a main shaft flange 1, a tensioning mandrel 2, an end face positioning sleeve 3, a tensioning sleeve 4, a guiding tensioning sleeve 5, a spacer 6, a gasket 7, a locking nut 8, an inner hexagonal cylindrical head bolt a9, an inner hexagonal cylindrical head bolt b10 and an inner hexagonal cylindrical head bolt c11;
the tensioning mandrel 2 is a five-stage stepped shaft, the diameter of the second-stage stepped shaft is the largest, the diameter of the fifth-stage stepped shaft is the smallest, the outer cylindrical surface and the end surface of the shaft shoulder of the first-stage stepped shaft are matched with the main shaft flange 1, and the outer cylindrical surface and the end surface of the shaft shoulder of the first-stage stepped shaft are connected with one end of the main shaft flange 1 through an inner hexagonal cylindrical head bolt b 10; the other end of the spindle flange 1 is positioned in an inner hole of a spindle of a machine tool and is connected with the machine tool through an inner hexagonal cylindrical head bolt a 9; the end face positioning sleeve 3 is sleeved on a third-stage stepped shaft of the tensioning mandrel 2, the lower end face is connected with the shaft shoulder of the tensioning mandrel 2 through an inner hexagonal cylindrical head bolt c11, and the upper end face is used for positioning the end face of the product 12;
the tensioning sleeve 4, the spacer bush 6, the guide tensioning sleeve 5, the gasket 7 and the locking nut 8 are sleeved on a fifth-stage stepped shaft of the tensioning mandrel 5 in sequence; the tensioning sleeve 4 and the guiding tensioning sleeve 5 are made of spring steel and are of thin-wall ring groove structures, an inner hole is matched with the tensioning mandrel 2, the diameter phi D2 of the outer circle of the middle part is determined according to the inner hole sizes of different products 12, and tensioning force is generated on the products 12 through micro deformation under the condition of applying pressure; the guide tensioning sleeve 5 has an outer circle diameter of phi D2 at one end surface, and plays a role in guiding; the inner hole of the spacer bush 6 is matched with the tensioning mandrel 2, the outer circle size is smaller than the inner hole size of the product 12, and the spacer bush 6 is used for adapting to the length change of different products 12; the gasket 7 is used for isolating the guide tensioning sleeve 5 and the locking nut 8 so as to prevent the guide tensioning sleeve 5 from being damaged; the lock nut 8 is in threaded connection with the tensioning mandrel 2, and a formed thread pair provides pressure to compress and position the product 12.
The end face positioning sleeve 3 is made of different materials and heat treatment modes according to different materials of processed products.
The invention has the beneficial effects that:
the hole characteristics are used as positioning and clamping elements, so that the special-shaped products with the hole characteristics are positioned and compressed at the same time, the accurate positioning and clamping are reliable, the processing surface is completely opened, and the first-order processing rate is greatly improved; the reference conversion of multi-working-procedure processing is avoided, the coincidence of the design reference and the processing reference is realized, and the processing precision is improved.
Drawings
FIG. 1 is a schematic diagram of a mechanical tensioning device for an inner bore;
FIG. 2 is a side view of the mechanical tensioning device of the bore;
FIG. 3 (a) is a schematic view of a guide tension sleeve;
FIG. 3 (b) is a cross-sectional view of a guide tension sleeve;
in the figure: a main shaft flange; 2, tensioning the mandrel; 3, positioning the sleeve on the end face; 4, tensioning the sleeve; 5, guiding the tensioning sleeve; 6 spacer bush; 7, a gasket; 8, locking the nut; 9, a hexagon socket head cap bolt a;10 hexagon socket head cap bolts b;11 hexagon socket head cap bolts c;12 products.
Detailed Description
Specific embodiments of the present invention will be further described below with reference to the drawings and the accompanying technical schemes.
As shown in fig. 1 and 2, the inner hole mechanical tensioning device comprises a main shaft flange 1, a tensioning mandrel 2, an end face positioning sleeve 3, a tensioning sleeve 4, a guiding tensioning sleeve 5, a spacer bush 6, a gasket 7, a locking nut 8, an inner hexagonal cylindrical head bolt a9, an inner hexagonal cylindrical head bolt b10 and an inner hexagonal cylindrical head bolt c11;
the tensioning mandrel 2 is a five-stage stepped shaft, the diameter of the second-stage stepped shaft is the largest, the diameter of the fifth-stage stepped shaft is the smallest, the outer cylindrical surface and the end surface of the shaft shoulder of the first-stage stepped shaft are matched with the main shaft flange 1, and the outer cylindrical surface and the end surface of the shaft shoulder of the first-stage stepped shaft are connected with one end of the main shaft flange 1 through an inner hexagonal cylindrical head bolt b 10; the other end of the spindle flange 1 is positioned in an inner hole of a spindle of a machine tool and is connected with the machine tool through an inner hexagonal cylindrical head bolt a 9; the end face positioning sleeve 3 is sleeved on a third-stage stepped shaft of the tensioning mandrel 2, the lower end face is connected with the shaft shoulder of the tensioning mandrel 2 through an inner hexagonal cylindrical head bolt c11, and the upper end face is used for positioning the end face of the product 12;
the tensioning sleeve 4, the spacer bush 6, the guide tensioning sleeve 5, the gasket 7 and the locking nut 8 are sleeved on a fifth-stage stepped shaft of the tensioning mandrel 5 in sequence; the tensioning sleeve 4 and the guiding tensioning sleeve 5 are made of spring steel, are of thin-wall ring groove structures, an inner hole is matched with the tensioning mandrel 2, the diameter phi D2 of the outer circle of the middle part is determined according to the inner hole sizes of different products 12, and tensioning force is generated on the products 12 through micro deformation under the condition of applying pressure; the guide tensioning sleeve 5 has an outer circle diameter of phi D2 at one end surface, and plays a role in guiding; the inner hole of the spacer bush 6 is matched with the tensioning mandrel 2, the outer circle size is smaller than the inner hole size of the product 12, and the spacer bush 6 is used for adapting to the length change of different products 12; the gasket 7 is used for isolating the guide tensioning sleeve 5 and the locking nut 8 so as to prevent the guide tensioning sleeve 5 from being damaged; the lock nut 8 is in threaded connection with the tensioning mandrel 2, and a formed thread pair provides pressure to compress and position the product 12.
The end face positioning sleeve 3 is made of different materials and heat treatment modes according to different materials of processed products.
In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.
Claims (1)
1. The inner hole mechanical tensioning device is characterized by comprising a main shaft flange (1), a tensioning mandrel (2), an end face positioning sleeve (3), a tensioning sleeve (4), a guiding tensioning sleeve (5), a spacer bush (6), a gasket (7), a locking nut (8), an inner hexagonal cylindrical head bolt a (9), an inner hexagonal cylindrical head bolt b (10) and an inner hexagonal cylindrical head bolt c (11);
the tensioning mandrel (2) is a five-stage stepped shaft, the diameter of the second-stage stepped shaft is the largest, the diameter of the fifth-stage stepped shaft is the smallest, the outer cylindrical surface and the end face of the shaft shoulder of the first-stage stepped shaft are matched with the main shaft flange (1), and the outer cylindrical surface and the end face of the shaft shoulder of the first-stage stepped shaft are connected with one end of the main shaft flange (1) through an inner hexagonal cylindrical head bolt b (10); the other end of the main shaft flange (1) is positioned in an inner hole of a main shaft of the machine tool and is connected with the machine tool through an inner hexagonal cylindrical head bolt a (9); the end face positioning sleeve (3) is sleeved on a third-stage stepped shaft of the tensioning mandrel (2), the lower end face is connected with a shaft shoulder of the tensioning mandrel (2) through an inner hexagonal cylindrical head bolt c (11), and the upper end face is used for positioning the end face of the product (12);
the tensioning sleeve (4), the spacer bush (6), the guide tensioning sleeve (5), the gasket (7) and the locking nut (8) are sequentially sleeved on a fifth-stage stepped shaft of the tensioning mandrel (2); the tensioning sleeve (4) and the guiding tensioning sleeve (5) are made of the same material and are made of spring steel, are of a thin-wall ring groove structure, an inner hole is matched with the tensioning mandrel (2), the diameter phi D2 of the outer circle of the middle part is determined according to the inner hole sizes of different products (12), and tensioning force is generated on the products (12) through micro deformation under the condition of applying pressure; the guide tensioning sleeve (5) has an end face with an outer circle diameter of phi D2, and plays a role in guiding; the inner hole of the spacer bush (6) is matched with the tensioning mandrel (2), the outer circle size is smaller than the inner hole size of the product (12), and the spacer bush (6) is used for adapting to the length change of different products (12); the gasket (7) is used for isolating the guide tensioning sleeve (5) and the locking nut (8) so as to prevent the guide tensioning sleeve (5) from being damaged; the locking nut (8) is in threaded connection with the tensioning mandrel (2) to form a threaded pair to provide pressure, so that the compression and positioning of the product (12) are realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910039352.0A CN109676171B (en) | 2019-01-16 | 2019-01-16 | Inner hole mechanical tensioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910039352.0A CN109676171B (en) | 2019-01-16 | 2019-01-16 | Inner hole mechanical tensioning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109676171A CN109676171A (en) | 2019-04-26 |
| CN109676171B true CN109676171B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910039352.0A Active CN109676171B (en) | 2019-01-16 | 2019-01-16 | Inner hole mechanical tensioning device |
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| Country | Link |
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| CN (1) | CN109676171B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111168441B (en) * | 2020-03-16 | 2024-04-16 | 沈阳飞机工业（集团）有限公司 | Stress-free pressing device |
| CN112045213A (en) * | 2020-09-09 | 2020-12-08 | 马鞍山中金超硬材料科技发展有限公司 | Roller ring expansion clamp and machining process thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921983A (en) * | 2012-11-05 | 2013-02-13 | 中核(天津)科技发展有限公司 | Internal expanding type clamp device |
| WO2013170475A1 (en) * | 2012-05-18 | 2013-11-21 | 浙江联宜电机股份有限公司 | Expanding and tightening clamping tool |
| CN207288938U (en) * | 2017-10-23 | 2018-05-01 | 云科智能制造（沈阳）有限公司 | One kind automatic positioning tensioning clamper |
| CN209632155U (en) * | 2019-01-16 | 2019-11-15 | 沈阳飞机工业（集团）有限公司 | Inner hole machinery tensioning device |
-
2019
- 2019-01-16 CN CN201910039352.0A patent/CN109676171B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013170475A1 (en) * | 2012-05-18 | 2013-11-21 | 浙江联宜电机股份有限公司 | Expanding and tightening clamping tool |
| CN102921983A (en) * | 2012-11-05 | 2013-02-13 | 中核(天津)科技发展有限公司 | Internal expanding type clamp device |
| CN207288938U (en) * | 2017-10-23 | 2018-05-01 | 云科智能制造（沈阳）有限公司 | One kind automatic positioning tensioning clamper |
| CN209632155U (en) * | 2019-01-16 | 2019-11-15 | 沈阳飞机工业（集团）有限公司 | Inner hole machinery tensioning device |
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| Publication number | Publication date |
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| CN109676171A (en) | 2019-04-26 |
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