CN109108697B - Thin-wall elastic support and tool and machining method thereof - Google Patents
Thin-wall elastic support and tool and machining method thereof Download PDFInfo
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- CN109108697B CN109108697B CN201811287661.1A CN201811287661A CN109108697B CN 109108697 B CN109108697 B CN 109108697B CN 201811287661 A CN201811287661 A CN 201811287661A CN 109108697 B CN109108697 B CN 109108697B
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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
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
- B23Q3/065—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding workpieces being specially deformable, e.g. made from thin-walled or elastic material
Abstract
The invention discloses a thin-wall elastic support, a tool and a processing method thereof, wherein the tool comprises a processing mandrel, a bushing and a fastener; the middle part of the processing mandrel is sequentially provided with a large-diameter section and a small-diameter section, and a first positioning part is formed between the large-diameter section and the small-diameter section so that one side of a limiting part extending in the radial direction of the inner wall of a blank to be processed is axially abutted against the first positioning part for positioning; the outer diameter of the large-diameter section of the processing mandrel is matched with the inner diameter of the first thin-wall section of the finished product on one side of the limiting part; the bushing is used for being sleeved on the small-diameter section of the processing mandrel, and a second positioning part is arranged at the end part of the inner shaft of the bushing so as to be axially abutted against the other side of the limiting part for positioning; the fastener is detachably and fixedly connected with the processing mandrel so as to limit the axial relative position of the bushing relative to the processing mandrel. By applying the scheme, the precision of the finished product of the thin-wall elastic support can be effectively improved, so that the yield of the product can be further ensured.
Description
Technical Field
The invention relates to the technical field of thin-wall elastic support structure processing, in particular to a thin-wall elastic support and a tool and a processing method thereof.
Background
The elastic bearing belongs to a damping device, and is widely applied to a damping device in a small displacement bearing mode based on the characteristic that the elastic bearing has no friction and abrasion.
It is known that thin-wall spring support structure processing requires high precision, such as but not limited to perpendicularity, and is easy to change in the processing process. Therefore, in the actual machining process, the precision requirement cannot be met by directly cutting the bar stock.
In view of this, it is desirable to optimize the tooling for the thin-wall elastic support machining and dismounting process to ensure the precision requirement and effectively improve the yield.
Disclosure of Invention
In order to solve the technical problems, the invention provides the thin-wall elastic support, and the tool and the processing method thereof, and the tool and the processing method can effectively improve the finished product precision of the thin-wall elastic support.
The invention provides a tool for a thin-wall elastic support, which comprises a processing mandrel, a bushing and a fastener; the middle part of the processing mandrel is sequentially provided with a large-diameter section and a small-diameter section, and a first positioning part is formed between the large-diameter section and the small-diameter section so that one side of a limiting part extending in the radial direction of the inner wall of a blank to be processed is axially abutted against the first positioning part for positioning; the outer diameter of the large-diameter section of the processing mandrel is matched with the inner diameter of the first thin-wall section of the finished product on one side of the limiting part; the bushing is used for being sleeved on the small-diameter section of the processing mandrel, and a second positioning part is arranged at the end part of the inner shaft of the bushing so as to be axially abutted against the other side of the limiting part for positioning; the fastener is detachably and fixedly connected with the processing mandrel so as to limit the axial relative position of the bushing relative to the processing mandrel.
Preferably, a first radially inward-contracting section forming the second positioning portion is arranged at the inner side end of the bushing body, and the outer diameter of the first radially inward-contracting section is matched with the inner diameter of the limiting portion.
Preferably, the outer diameter of the body of the bushing is matched with the inner diameter of the second thin-wall section of the finished product on the other side of the limiting part.
Preferably, a second radial inward-contracting section is arranged at the outer side end of the body of the bushing, and the second radial inward-contracting section axially extends into an inner hole of the second thin-wall section of the finished product; and an annular groove is arranged on the surface of the large-diameter section of the processing mandrel and axially extends into an inner hole of the first thin-wall section of the finished product.
Preferably, the outer surface of the second radial adduction section is provided with a disassembly process hole.
Preferably, the processing dabber one side shaft ends of major diameter section is provided with first screw thread section, the frock still includes: the dismounting tool sleeve can be sleeved on the processing mandrel and can be axially abutted against the second thin-wall section of the finished product; and the disassembling nut is in threaded fit with the first threaded section so as to press and abut against the disassembling tool sleeve to apply a pushing force to the finished product elastic support.
Preferably, a second thread section is arranged at the shaft end part on one side of the small-diameter section of the machining mandrel, and the fastener comprises double nuts which are axially and sequentially in thread fit with the second thread section.
The invention also provides a thin-wall elastic support which is formed by machining the tool, wherein the inner wall of the elastic support is provided with a radially extending limiting part, and one side of the limiting part is provided with a first thin-wall section extending axially.
Preferably, the other side of the limiting part is provided with a second thin-wall section extending axially, the second thin-wall section is provided with a plurality of radial through holes uniformly distributed in the circumferential direction, and the outer side end of the second thin-wall section is provided with an end flange.
The invention also provides a processing method of the thin-wall elastic support, which adopts the tool and is executed according to the following steps:
s1, sleeving a blank to be processed on a processing mandrel from one end of a small-diameter section of the processing mandrel, and abutting one side of a radially extending limiting part of the inner wall of the blank to be processed against a first positioning part of the processing mandrel for positioning;
s2, sleeving the bushing on the machining mandrel from one end of the small-diameter section of the machining mandrel until a second positioning part on the bushing is axially abutted against the other side of the limiting part for positioning;
s3, fixedly connecting the fastener with the machining mandrel until the axial relative position of the bushing relative to the machining mandrel is determined;
s4, mounting the processing mandrel on a processing machine tool, and processing to a finished product size;
and S5, disassembling the processing mandrel from the processing machine tool, and sequentially disassembling the fastener, the bushing and the finished product elastic support.
Aiming at the characteristics that the thin-wall elastic support has high precision requirement and is easy to deform, the invention provides the technical scheme of the tool in a new way. In practical application, after a blank to be processed is mounted on the tool, on one hand, a processing mandrel of the blank is matched and attached to the inner surface of the thin-wall elastic support, so that reliable radial support is established; meanwhile, the axial positioning between the blank to be processed and the processing mandrel is pressed and fixed in the axial direction by the bushing, so that a good positioning reference is provided for the elastic support processing process, the possibility of deformation of the elastic support can be effectively prevented in the cutting process, the processing precision of finished products is greatly improved, and the yield of products is ensured. In addition, the scheme makes full use of the limiting part of the inner wall of the thin-wall elastic support, and has reasonable structural design and better operation convenience.
In a preferred embodiment of the present invention, a second radially inward contracting section is provided at the outer end of the body of the bushing, and the second radially inward contracting section axially extends into the inner hole of the second thin-walled section of the finished product, so that the outer end surface of the second thin-walled section can be radially machined; meanwhile, an annular groove is formed in the surface of the large-diameter section of the machining mandrel and axially extends into an inner hole of the first thin-wall section of the finished product, and therefore the outer end face of the first thin-wall section can be radially machined. So set up, can further ensure finished product axial dimension's accurate control, applicable in the higher elastic support of axial dimension precision requirement.
In another preferred scheme of the invention, a dismounting fabrication hole is formed in the outer surface of the second radial inward-contraction section of the bushing, and a first thread section, a matched dismounting tool sleeve and a dismounting nut are arranged at the shaft end part on one side of the large-diameter section of the processing mandrel. According to the arrangement, after the machining is completed, firstly, the bushing is disassembled from the mandrel through the disassembling process hole by using a hard object, then, the disassembling tool sleeve is sleeved on the mandrel, the thin-wall elastic support is ejected out through the matching of the disassembling nut and the first thread section of the mandrel, so that the thin-wall elastic support is separated from the mandrel, no radial force is applied in the process of disassembling a finished product, the radial deformation of the elastic support possibly caused by improper operation in the disassembling process can be completely avoided, and the product yield can be further ensured.
Drawings
Fig. 1 is a schematic view of a use state of the tool for thin-wall elastic support according to the embodiment;
FIG. 2 is a schematic view of an exemplary process for using the thin-walled elastomeric support tool according to one embodiment;
FIG. 3 is a schematic view of a disassembly aid of the tool shown in FIG. 1;
fig. 4 is a schematic view of the use state of the disassembly aid shown in fig. 3.
In fig. 1-4:
the tool comprises a fastener 1, a processing mandrel 2, a large-diameter section 21, an annular groove 211, a small-diameter section 22, a first positioning part 23, a first thread section 24, a second thread section 25, a bushing 3, a second positioning part 31, a body 32, a first radial inward-contracting section 33, a second radial inward-contracting section 34, a dismounting fabrication hole 35, a dismounting tool sleeve 4 and a dismounting nut 5;
the processing device comprises a blank to be processed 10 ', a process ring groove 11', a thin-wall elastic support 10, a limiting part 11, a first thin-wall section 12, an outer end face 121, a second thin-wall section 13, an outer end face 131, an end flange 14 and a radial through hole 15.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Without loss of generality, the thin-wall elastic support shown in the drawing is taken as a description main body in the embodiment, and the tool for machining and disassembling provided by the application is explained in detail. As shown in the figures, the inner wall of the thin-wall elastic support 10 is provided with a radially extending limiting part 11, one side of the limiting part 11 is provided with a first thin-wall section 12 extending axially, the other side of the limiting part is provided with a second thin-wall section 13 extending axially, and the outer side end of the second thin-wall section 13 is provided with an end flange 14; furthermore, a plurality of radial through holes 15 are provided in the second thin-walled section 13, which are distributed uniformly in the circumferential direction.
Fig. 1 is a schematic view showing a use state of the tool for thin-walled elastic support according to the present embodiment.
The tool can be used for the production process of the thin-wall elastic support 10, and mainly comprises a fastener 1, a processing mandrel 2 and a bushing 3 as shown in figure 1. Wherein, the tip of processing dabber 2 is installed in machine tool (not shown in the figure), here, the both ends axis department of processing dabber 2 can all be equipped with the apical pore for fixed processing frock. The middle part of the blank is sequentially provided with a large-diameter section 21 and a small-diameter section 22, and a first positioning part 23 is formed between the large-diameter section and the small-diameter section, so that one side of a limiting part 11 which extends radially on the inner wall of the blank 10' to be processed is axially abutted against the first positioning part 23 for positioning; and the outer diameter of the large diameter section 21 of the processing mandrel 2 is adapted to the inner diameter of the finished first thin-wall section 12 at one side of the limiting part 11. In this way, the machining mandrel 2 is approximately attached to the inner surface of the thin-walled elastic support 10, and a good supporting effect is achieved.
The bush 3 is used for being sleeved on the small-diameter section 22 of the processing mandrel 2, and the end part of the inner shaft of the bush 3 is provided with a second positioning part 31 so as to be abutted against the other side of the limiting part 11 in the axial direction for positioning; the fastener 1 is detachably fixedly connected with the machining mandrel 2 to define the axial relative position of the bush 3 with respect to the machining mandrel 2. With the arrangement, the bush 3, the blank 10' (the limiting part 11) to be processed and the processing mandrel 2 are reliably positioned in the axial direction under the action of the fastener 1. Due to the arrangement, a good positioning reference is provided for the elastic support in the machining process, and the possibility of deformation of the elastic support can be effectively prevented in the cutting process, so that the machining precision of finished products is greatly improved, and the yield of the products is ensured. In addition, the scheme makes full use of the limiting part of the inner wall of the thin-wall elastic support, and has reasonable structural design and better operation convenience.
Specifically, the configuration gap between the processing mandrel 2 and the elastic support 10 to be processed is 0.004-0.006 mm, and the configuration gap between the processing mandrel 2 and the bushing 3 is 0.004-0.006 mm.
It should be noted that, the limiting portion 11 for establishing the axial positioning reference may be made of the thin-wall elastic support 10 itself as shown in this embodiment, and on the basis of not affecting the basic use function of the component, a limiting portion for positioning may also be provided on the inner surface of the thin-wall component, as long as the aforementioned core design concept is adopted, which is within the scope of the present application.
Referring to fig. 2, a schematic diagram of a typical process for applying the thin-walled elastic support tool is shown.
As shown in FIG. 2, a bar-shaped base material with a suitable outer diameter and length is selected, and the inner surface, including but not limited to the limiting portion 11 on the inner wall, is machined according to the specific shape and size of the thin-wall elastic support 10, so as to form the blank 10' to be machined as shown in FIG. 2 (a). Of course, for a thin-walled member requiring precise axial machining for dimension control, the inner wall of the blank 10 'to be machined can be further machined with the process ring groove 11' to facilitate the cutting of the outer end face 121 of the first thin-walled segment 12, and the finished thin-walled elastic support 10 is shown in fig. 2 (c). That is, the inner surface of the workpiece in the machining process needs to meet the design precision requirement, namely the inner surface of the finished thin-wall elastic support 10.
In order to further improve the supporting and positioning effect of the tool, it is preferable that a first radially inward-contracting section 33 is provided at the inner end of the main body 32 of the bushing 3 shown in the figure, and the first radially inward-contracting section 33 may form a second positioning portion 31 for axially fitting with the stopper portion 11, where the outer diameter of the first radially inward-contracting section 33 is adapted to the inner diameter of the stopper portion 11, so as to further improve the machining accuracy by increasing the fitting area between the blank 10' to be machined and the tool.
In addition, for the second thin-wall section 13 needing to be machined, the outer diameter of the body 32 of the bushing 3 is matched with the inner diameter of the finished second thin-wall section 13 on the other side of the limiting part 11, and effective bearing during cutting machining of the section of the structure is established.
In addition, a second radial inner shrinkage section 34 is arranged at the outer side end of the body 32 of the bushing 3, and the second radial inner shrinkage section 34 axially extends into an inner hole of the finished second thin-wall section 13 to serve as a technological structure for radially cutting the outer end surface 131 of the second thin-wall section 13; meanwhile, the annular groove 211 is formed in the surface of the large-diameter section 21 of the machining mandrel 2, the annular groove 211 axially extends into an inner hole of the first thin-wall section 12 of the finished product, and similarly, the annular groove 211 is used as a process structure for radially cutting the outer end face 121 of the first thin-wall section 12, so that the accurate control of the axial size of the finished product can be further guaranteed.
The outer surface of the second radial inward-contraction section 34 is provided with a dismounting process hole 35, after the processing is completed, the bushing 3 is dismounted from the processing mandrel 2 through the dismounting process hole 35 by using a hard object, and the dismounting and mounting of the bushing 3 can be realized without additionally using other tools.
As a further preference, in order to avoid radial stress deformation of the finished workpiece in the process of disassembling the finished workpiece, a related auxiliary tool can be additionally arranged for the purpose that the finished workpiece is separated from the machining mandrel 2. Please refer to fig. 3 and fig. 4 together, wherein fig. 3 is a schematic structural diagram of a disassembly aid of the tool shown in fig. 1, and fig. 4 is a schematic usage state diagram of the disassembly aid shown in fig. 3.
A first thread section 24 is arranged at the shaft end part of one side of the large-diameter section 21 of the processing mandrel 2, and the auxiliary tool comprises a dismounting tool sleeve 4 and a dismounting nut 5; the dismounting tool sleeve 4 can be sleeved on the processing mandrel 3 and can be axially abutted against the finished product second thin-wall section 12, and the dismounting nut 5 is in threaded fit with the first thread section 24 so as to press the dismounting tool sleeve 4 to apply a pushing force to the finished product elastic support 10; that is, the thin-wall elastic support 10 is ejected out through the matching of the dismounting nut 5 and the first thread section 24 of the processing mandrel 2, so that the thin-wall elastic support is separated from the processing mandrel 2, no radial force is applied in the process of dismounting a finished product, and the radial deformation of the elastic support, which is possibly caused by improper operation in the dismounting process, can be completely avoided.
In addition, the fastening element 1 for limiting the axial relative position of the bushing 3 with respect to the machining mandrel 2 according to the present embodiment may be implemented in different structural forms as required, for example, but not limited to, a second threaded section 25 is provided at one side of the small-diameter section 22 of the machining mandrel 2, and the fastening element 1 includes a double nut, preferably a knurled nut, which is axially and sequentially in threaded engagement with the second threaded section 25; wherein, the nut that is close bush 3 plays the positioning action, and the outside nut plays locking effect, and two nut adaptations ensure that this positioning relation does not have the pine in the cutting process.
The machining method of the thin-wall elastic support adopting the tool is implemented according to the following steps:
s1, sleeving a blank to be processed 10 'on a processing mandrel 2 from one end of a small-diameter section 22 of the processing mandrel 2 until one side of a limiting part 11 extending radially from the inner wall of the blank to be processed 10' abuts against and is positioned on a first positioning part 23 of the processing mandrel 2;
s2, sleeving the bush 3 on the machining mandrel 2 from one end of the small-diameter section 22 of the machining mandrel 2 until the second positioning part 31 on the bush 3 is axially abutted against the other side of the limiting part 11 for positioning;
s3, fixedly connecting the fastener 1 with the processing mandrel 2 until the fixed bushing 3 is axially opposite to the processing mandrel;
s4, mounting the processing mandrel 2 on a processing machine tool, and processing to a finished product size;
s5, the processing mandrel 2 is disassembled from the processing machine tool, and the fastener 1, the bush 3 and the finished product elastic support 10 are sequentially disassembled.
In addition to the above-mentioned tool, the present embodiment also provides a thin-walled elastic support formed by processing the tool,
it should be noted that the above-mentioned examples provided by the present embodiment are not limited to the thin-walled elastic support of the structure shown in the drawings, and it should be understood that the core concept is consistent with the present disclosure and is within the scope of the present application.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (10)
1. A frock for thin wall elastic support, characterized by includes:
the middle part of the processing mandrel is sequentially provided with a large-diameter section and a small-diameter section, and a first positioning part is formed between the large-diameter section and the small-diameter section so that one side of a limiting part extending in the radial direction of the inner wall of a blank to be processed is axially abutted against the first positioning part for positioning; the outer diameter of the large-diameter section of the processing mandrel is matched with the inner diameter of the first thin-wall section of the finished product on one side of the limiting part;
the bushing is sleeved on the small-diameter section of the processing mandrel, and a second positioning part is arranged at the end part of an inner shaft of the bushing so as to be axially abutted against the other side of the limiting part for positioning;
a fastener removably fixedly connected with the machining mandrel to define an axial relative position of the bushing with respect to the machining mandrel.
2. The tooling of claim 1, wherein a first radially inward-contracting section forming the second positioning portion is arranged at the inner side end of the bushing body, and the outer diameter of the first radially inward-contracting section is matched with the inner diameter of the limiting portion.
3. The tooling of claim 2, wherein the outer diameter of the body of the bushing is adapted to the inner diameter of the second thin-walled section of the finished product on the other side of the limiting portion.
4. The tooling as claimed in any one of claims 1 to 3, wherein the outboard end of the body of the bushing is provided with a second radially inner section extending axially into the inner bore of the second thin walled section of the finished product; and an annular groove is arranged on the surface of the large-diameter section of the processing mandrel and axially extends into an inner hole of the first thin-wall section of the finished product.
5. The tooling of claim 4, wherein an outer surface of the second radially inner section is provided with a removal tooling hole.
6. The tooling of claim 4, wherein a first thread section is arranged at one side shaft end part of the large-diameter section of the machining mandrel, and the tooling further comprises:
the dismounting tool sleeve can be sleeved on the processing mandrel and can be axially abutted against the second thin-wall section of the finished product;
and the disassembling nut is in threaded fit with the first threaded section so as to press and abut against the disassembling tool sleeve to apply a pushing force to the finished product elastic support.
7. The tooling of claim 6, wherein a second thread section is arranged at one side shaft end part of the small-diameter section of the machining mandrel, and the fastener comprises double nuts which are axially and sequentially in thread fit with the second thread section.
8. The thin-wall elastic support is characterized in that the thin-wall elastic support is formed by machining the tool according to any one of claims 1 to 7, the inner wall of the elastic support is provided with a radially extending limiting part, and one side of the limiting part is provided with a first thin-wall section extending axially.
9. The thin-wall elastic support according to claim 8, wherein the other side of the limiting part is provided with a second thin-wall section which extends axially, the second thin-wall section is provided with a plurality of radial through holes which are uniformly distributed in the circumferential direction, and the outer side end of the second thin-wall section is provided with an end flange.
10. A method for processing a thin-wall elastic support, which is characterized by adopting the tool set forth in any one of claims 1 to 7 and comprising the following steps:
s1, sleeving a blank to be processed on a processing mandrel from one end of a small-diameter section of the processing mandrel, and abutting one side of a radially extending limiting part of the inner wall of the blank to be processed against a first positioning part of the processing mandrel for positioning;
s2, sleeving the bushing on the machining mandrel from one end of the small-diameter section of the machining mandrel until a second positioning part on the bushing is axially abutted against the other side of the limiting part for positioning;
s3, fixedly connecting the fastener with the machining mandrel until the axial relative position of the bushing relative to the machining mandrel is determined;
s4, mounting the processing mandrel on a processing machine tool, and processing to a finished product size;
and S5, disassembling the processing mandrel from the processing machine tool, and sequentially disassembling the fastener, the bushing and the finished product elastic support.
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| CN201811287661.1A CN109108697B (en) | 2018-10-31 | 2018-10-31 | Thin-wall elastic support and tool and machining method thereof |
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| CN109909433B (en) * | 2019-03-29 | 2020-11-03 | 北京航空航天大学 | Machining tool and machining method for centrifugal compressor |
| CN113414591B (en) * | 2021-07-21 | 2022-06-07 | 程旭 | Portable machine tool for machining |
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| RU2225954C2 (en) * | 2001-12-21 | 2004-03-20 | Самарская государственная академия путей сообщения | Elastic damping support for rotor |
| CN101504038A (en) * | 2009-03-09 | 2009-08-12 | 浙江大学 | Rotor cage type elastic support |
| CN102425639A (en) * | 2011-11-30 | 2012-04-25 | 中国航空动力机械研究所 | Elastic supporting structure |
| CN203614601U (en) * | 2013-12-13 | 2014-05-28 | 中航商用航空发动机有限责任公司 | Combined type elastic supporting device |
| CN105526304B (en) * | 2015-12-02 | 2018-03-30 | 西北工业大学 | A kind of intelligence structure cartridge branch dry damping device |
| CN106907355B (en) * | 2017-04-28 | 2019-03-05 | 中国航发湖南动力机械研究所 | A kind of elastic bearing squeeze film damper |
| CN207989146U (en) * | 2018-02-05 | 2018-10-19 | 中国人民解放军海军工程大学 | One kind having multiple bearing fulcrum mouse cage elastic bearing |
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