CN115815647A - Array composite pipe clamping method and device adopting internal expansion unit - Google Patents
Array composite pipe clamping method and device adopting internal expansion unit Download PDFInfo
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- CN115815647A CN115815647A CN202211400985.8A CN202211400985A CN115815647A CN 115815647 A CN115815647 A CN 115815647A CN 202211400985 A CN202211400985 A CN 202211400985A CN 115815647 A CN115815647 A CN 115815647A
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- 239000002131 composite material Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 4
- 230000036316 preload Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 4
- 210000000078 claw Anatomy 0.000 description 3
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a clamping method and a clamping device for an array composite pipe by adopting an internal expansion unit. The array composite pipe blank processing device comprises a clamp body and an internal expansion unit connected to the clamp body, wherein the internal expansion unit comprises a mandrel and telescopic clamping jaws sleeved on the mandrel, the array composite pipe blank to be processed is placed on a supporting surface of the clamp body, the mandrel enters into the corresponding composite pipe, the telescopic clamping jaws are used for being sleeved into the mandrel from the upper part of the composite pipe and then clamped in the composite pipe, and an electromagnetic clamping mechanism is arranged between the clamp body and the mandrel and used for ensuring that the array composite pipe clamped by the telescopic clamping jaws and the clamp body are kept fixed. The in-plane direction position of the internal expansion unit in the clamping process of the array composite pipe can be self-adaptive to the position of the axis of the corresponding composite pipe, and theoretically, the clamping stress generated due to inaccurate in-plane position of the axis of the composite pipe is inhibited. The invention has simple clamping process and convenient use.
Description
Technical Field
The invention relates to the technical field of clamping, in particular to a clamping method and a clamping device for an array composite pipe adopting an internal expansion unit.
Background
The array composite pipe is a typical honeycomb structure, is made of single cylindrical shell-shaped composite pipe units through two-dimensional close arrangement, has the advantages of low density, high axial rigidity, excellent impact resistance, vibration reduction, strong performance designability and the like as shown in figure 1, and can be applied to the manufacturing of industrial products such as aerospace, chemical engineering and the like. Similar to honeycomb structures, the array composite pipe is generally used in a sandwich structure, i.e., the array composite pipe is assembled with upper and lower skins as a sandwich structure. When the skin has the requirement of a specific surface type, the array composite pipe needs to be machined into a matched shape by a machining method.
Reliable and stable clamping is the basis for realizing high-quality processing of the array composite pipe. However, in the preparation process of the array composite pipe, the glue layers exist between the composite pipe units, and the outer diameters of the composite pipes have errors, so that tangency cannot be realized between the adjacent composite pipes at the same time, the positions of the axes of the composite pipes in the horizontal plane can float in a certain range, when the array composite pipe is clamped by using the clamping unit with a fixed position, larger local clamping stress can be introduced, and the processed surface shape precision can be deteriorated due to stress release and clamping rebound deformation after processing. Therefore, the clamping device and the method for self-adapting the in-plane position are needed, the position of the clamping unit in the horizontal plane can float freely in a corresponding range according to the position of the designated composite pipe, the clamping stress is reduced, and the processing precision is improved.
Disclosure of Invention
In view of the above-mentioned problems, a method and an apparatus for clamping an array composite pipe using an internal expansion unit are provided. The technical means adopted by the invention are as follows:
the array composite pipe clamping device comprises a clamp body and an internal expansion unit connected to the clamp body, wherein the internal expansion unit comprises a mandrel and a telescopic clamping jaw sleeved on the mandrel, a blank of an array composite pipe to be processed is placed on a supporting surface of the clamp body, the mandrel enters the corresponding composite pipe, the telescopic clamping jaw is used for being sleeved into the mandrel from the upper part of the composite pipe and then clamped in the composite pipe, and an electromagnetic clamping mechanism is arranged between the clamp body and the mandrel and used for ensuring that the array composite pipe clamped by the telescopic clamping jaw and the clamp body are kept fixed.
Further, the electromagnetic clamping mechanism comprises an electromagnetic chuck and a floating connecting disc, the mandrel is fixed at a threaded hole of the floating connecting plate through threads at the lower end, and the floating connecting plate is placed on the electromagnetic chuck.
Furthermore, the telescopic clamping jaw comprises a lower conical block, a clamping jaw, an upper conical block and a conical block pressing plate, the lower conical block, the clamping jaw, the upper conical block and the conical block pressing plate are sequentially sleeved into the mandrel from the upper part of the composite pipe, the conical block pressing plate and the mandrel are connected together through threads, and the composite pipe is expanded through adjusting the pressing position of the conical block pressing plate.
The invention also discloses a clamping method of the array composite pipe clamping device adopting the internal expansion unit, which comprises the following steps:
and 4, ensuring that the array composite pipe and the clamp body are kept fixed by starting the electromagnetic clamping mechanism.
Further, in the step 2, the special spanner is used for rotating the conical block pressing plate, and a preset pretightening force is applied to expand the clamping jaws.
Further, in step 4, when the electromagnetic chuck is turned on, a preset magnetic field force is generated between the electromagnetic chuck and the steel floating connecting plate, and the maximum static friction force between the contact surfaces of the electromagnetic chuck and the steel floating connecting plate is also increased by the magnetic field force of the electromagnetic chuck and the steel floating connecting plate, so that the position of the clamping device in the horizontal plane is limited.
Compared with the prior art, the invention has the following advantages:
the in-plane direction position of the internal expansion unit in the array composite pipe clamping process can be self-adaptive to the position of the corresponding composite pipe axis, and theoretically, the clamping stress generated due to inaccurate in-plane position of the composite pipe axis is inhibited. The clamping process is simple, and the use is convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of an array composite tube structure according to the present invention.
FIG. 2 is a schematic cross-sectional view of the present invention.
FIG. 3 is a schematic cross-sectional view of the array composite pipe of the present invention.
FIG. 4 is a schematic view of the whole clamping axis of the array composite pipe of the present invention.
In the figure: 1. the device comprises an electromagnetic chuck, 2, a floating connecting plate, 3, a mandrel, 4, a composite pipe, 5, a conical block pressing plate, 6, an upper conical block, 7, a clamping jaw, 8, a lower conical block, 9 and a clamp body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in fig. 2 to 4, the embodiment of the invention discloses an array composite pipe clamping method and device using an internal expansion unit, the array composite pipe clamping method and device comprises a clamp body 9 and the internal expansion unit connected to the clamp body, the internal expansion unit comprises a mandrel 3 and telescopic claws sleeved on the mandrel 3, blanks of array composite pipes to be processed are placed on a supporting surface of the clamp body 9, the mandrel 3 enters the corresponding composite pipe 4, the telescopic claws are used for being sleeved on the mandrel from above the composite pipe 4 and then clamped inside the composite pipe 4, and an electromagnetic clamping mechanism is arranged between the clamp body 9 and the mandrel 3 and used for ensuring that the array composite pipes 4 clamped by the telescopic claws and the clamp body 9 are kept fixed.
The electromagnetic clamping mechanism comprises an electromagnetic chuck 1 and a floating connecting plate 2, the mandrel 3 is fixed at a threaded hole of the floating connecting plate 2 through threads at the lower end, the floating connecting plate 2 is placed on the electromagnetic chuck 1, and when the axial position of the clamping device is inconsistent with the axial position of the expanded composite pipe, the clamping device is driven by the radial force of the composite pipe on the clamping jaw 7 after the clamping device is placed into the clamping jaw 7. The bottom surface of the floating connecting plate 2 is attached to the upper surface of the electromagnetic chuck 1, and the clamping device can move by overcoming the maximum static friction force generated by the gravity of the clamping device, so that the clamping device can move in the horizontal plane.
The telescopic clamping jaw comprises a lower conical block 8, a clamping jaw 7, an upper conical block and a 6-conical block pressing plate 5, wherein the lower conical block 8, the clamping jaw 7, the upper conical block 6 and the conical block pressing plate 5 are sequentially sleeved into the mandrel 3 from the upper side of the composite pipe 4, the conical block pressing plate 5 and the mandrel 3 are connected together through threads, and the composite pipe is expanded through adjusting the pressing position of the conical block pressing plate 5.
A clamping method of an array composite pipe clamping device adopting an internal expansion unit comprises the following steps:
and 4, ensuring that the array composite pipe and the clamp body are kept fixed by starting the electromagnetic clamping mechanism.
In the step 4, the electromagnetic chuck 1 is opened, a preset magnetic field force is generated between the electromagnetic chuck 1 and the steel floating connecting plate 2, the floating connecting plate 2 cannot be separated from the electromagnetic chuck 1 due to external force due to the magnetic field force, and meanwhile, the maximum static friction force between the contact surfaces of the electromagnetic chuck 1 and the steel floating connecting plate is increased due to the magnetic field force, so that the position of the clamping device in the horizontal plane is limited.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The array composite pipe clamping device is characterized by comprising a clamp body and an internal expansion unit connected to the clamp body, wherein the internal expansion unit comprises a mandrel and a telescopic clamping jaw sleeved on the mandrel, a blank of an array composite pipe to be processed is placed on a supporting surface of the clamp body, the mandrel enters into the corresponding composite pipe, the telescopic clamping jaw is used for being sleeved into the mandrel from the upper part of the composite pipe and then clamped in the composite pipe, and an electromagnetic clamping mechanism is arranged between the clamp body and the mandrel and used for ensuring that the array composite pipe clamped by the telescopic clamping jaw and the clamp body are kept fixed.
2. The array composite pipe clamping device using the internal expanding unit as claimed in claim 1, wherein the electromagnetic clamping mechanism comprises an electromagnetic chuck and a floating connection plate, the mandrel is fixed at a threaded hole of the floating connection plate through threads at a lower end, and the floating connection plate is placed on the electromagnetic chuck.
3. The array composite pipe clamping device adopting the internal expansion unit as claimed in claim 1, wherein the telescopic clamping jaw comprises a lower conical block, a clamping jaw, an upper conical block and a conical block pressing plate, the lower conical block, the clamping jaw, the upper conical block and the conical block pressing plate are sequentially sleeved into the mandrel from the upper part of the composite pipe, the conical block pressing plate and the mandrel are connected together through threads, and the composite pipe is expanded through adjusting the pressing position of the conical block pressing plate.
4. A clamping method of the array composite pipe clamping device adopting the internal expansion unit according to any one of claims 1 to 3, which is characterized by comprising the following steps:
step 1, placing an array composite pipe blank to be processed on a supporting surface of a fixture body, ensuring that all mandrels enter into corresponding composite pipes, and then sleeving a lower conical block, a clamping jaw, an upper conical block and a conical block pressing plate into the mandrels from the upper part of the composite pipes in sequence;
step 2, the clamping jaws expand to contact the inner surface of the composite pipe;
step 3, automatically adjusting the position of the clamping device in the horizontal plane according to the position of the clamped composite pipe under the clamping stress-free condition;
and 4, ensuring that the array composite pipe and the clamp body are kept fixed by opening the electromagnetic clamping mechanism.
5. The method as claimed in claim 4, wherein in the step 2, the jaw is expanded by applying a predetermined pre-load force by rotating the tapered block pressing plate with a special wrench.
6. The method as claimed in claim 4, wherein in step 4, the electromagnetic chuck is turned on, and a predetermined magnetic force is generated between the electromagnetic chuck and the steel floating connection plate, and the magnetic force of the electromagnetic chuck and the steel floating connection plate increases the maximum static friction force between the contact surfaces of the electromagnetic chuck and the steel floating connection plate, so as to limit the position of the clamping device in the horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211400985.8A CN115815647A (en) | 2022-11-09 | 2022-11-09 | Array composite pipe clamping method and device adopting internal expansion unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211400985.8A CN115815647A (en) | 2022-11-09 | 2022-11-09 | Array composite pipe clamping method and device adopting internal expansion unit |
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| Publication Number | Publication Date |
|---|---|
| CN115815647A true CN115815647A (en) | 2023-03-21 |
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| CN202211400985.8A Pending CN115815647A (en) | 2022-11-09 | 2022-11-09 | Array composite pipe clamping method and device adopting internal expansion unit |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4130623A1 (en) * | 1990-06-02 | 1993-03-18 | Eurocopter Deutschland | Process to mfr. sandwich panel with honeycomb core and convex surfaces - has sheet of thermoplastics on one side of core which is heated and drawn into cells by pneumatic pressure or suction |
| US5224690A (en) * | 1991-05-13 | 1993-07-06 | Vaught James V | Work holder for honeycomb structure |
| CN202428217U (en) * | 2011-11-01 | 2012-09-12 | 成都飞机工业（集团）有限责任公司 | Tool for processing and fixedly holding honeycomb core parts |
| US20120291252A1 (en) * | 2009-10-21 | 2012-11-22 | Fooke Gmbh | Device and method for stiffening and holding a workpiece for machining |
| CN105522182A (en) * | 2016-02-25 | 2016-04-27 | 四川聚能核技术工程有限公司 | Internal expansion centering clamp and application thereof |
| CN109648358A (en) * | 2019-01-20 | 2019-04-19 | 成都飞机工业（集团）有限责任公司 | A kind of flexible frock and holding method for honeycomb core part processing and fixing |
| CN110524276A (en) * | 2019-08-09 | 2019-12-03 | 清华大学 | Bar group formula mounting and clamping system for cellular composite material |
| CN113182894A (en) * | 2021-04-02 | 2021-07-30 | 大连理工大学 | Clamping method for double-sided processing of pipe clamping layer structure of array composite material |
| CN114131359A (en) * | 2021-12-02 | 2022-03-04 | 首都航天机械有限公司 | Clamping device |
-
2022
- 2022-11-09 CN CN202211400985.8A patent/CN115815647A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4130623A1 (en) * | 1990-06-02 | 1993-03-18 | Eurocopter Deutschland | Process to mfr. sandwich panel with honeycomb core and convex surfaces - has sheet of thermoplastics on one side of core which is heated and drawn into cells by pneumatic pressure or suction |
| US5224690A (en) * | 1991-05-13 | 1993-07-06 | Vaught James V | Work holder for honeycomb structure |
| US20120291252A1 (en) * | 2009-10-21 | 2012-11-22 | Fooke Gmbh | Device and method for stiffening and holding a workpiece for machining |
| CN202428217U (en) * | 2011-11-01 | 2012-09-12 | 成都飞机工业（集团）有限责任公司 | Tool for processing and fixedly holding honeycomb core parts |
| CN105522182A (en) * | 2016-02-25 | 2016-04-27 | 四川聚能核技术工程有限公司 | Internal expansion centering clamp and application thereof |
| CN109648358A (en) * | 2019-01-20 | 2019-04-19 | 成都飞机工业（集团）有限责任公司 | A kind of flexible frock and holding method for honeycomb core part processing and fixing |
| CN110524276A (en) * | 2019-08-09 | 2019-12-03 | 清华大学 | Bar group formula mounting and clamping system for cellular composite material |
| CN113182894A (en) * | 2021-04-02 | 2021-07-30 | 大连理工大学 | Clamping method for double-sided processing of pipe clamping layer structure of array composite material |
| CN114131359A (en) * | 2021-12-02 | 2022-03-04 | 首都航天机械有限公司 | Clamping device |
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