CN113369937A - A processing clamp of preapring for an unfavorable turn of events for thin wall baffle part - Google Patents
A processing clamp of preapring for an unfavorable turn of events for thin wall baffle part Download PDFInfo
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- CN113369937A CN113369937A CN202110732053.2A CN202110732053A CN113369937A CN 113369937 A CN113369937 A CN 113369937A CN 202110732053 A CN202110732053 A CN 202110732053A CN 113369937 A CN113369937 A CN 113369937A
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- Prior art keywords
- processed
- clamp
- fixture
- base
- positioning
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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 processing anti-deformation clamp for the thin-wall baffle part comprises a positioning clamp body, a pressing hook and a clamp base, wherein the positioning clamp body is annular and is provided with an annular step groove, a part to be processed is arranged in the annular step groove, and the back of the part to be processed on the outer side of the part to be processed is tightly propped against the outermost step surface of the positioning clamp body; the clamp base is fixedly connected with the lower part of the positioning clamp body; the press hook is L-shaped, the upper end of the press hook is buckled on the part to be processed, and the lower end of the press hook penetrates through the clamp base and fastens the part to be processed on the positioning clamp body. The auxiliary support device has the advantages that the auxiliary support of the clamp is provided for the part to be machined, the back surface of the part is completely attached to the auxiliary support plane when the part is in a compressed state, the part cannot deform in the cutting process, and the machining quality of the part is effectively improved.
Description
Technical Field
The invention belongs to the technical field of machining of parts of aero-engines, and particularly relates to a machining anti-deformation clamp for thin-wall baffle parts.
Background
In aircraft engines, the low pressure turbine backplate is a critical component in the core engine and serves to limit the low pressure turbine blades. As shown in figure 3, the thinnest part of the part web is only 1.7mm, and the width of the comb tooth point is about 0.3 mm. The part has more complex shape, thin wall, poor rigidity, more arc switching and easy deformation during processing. When the turning machining construction table procedure is carried out, the back machining surface of the part is in a suspended machining state, the cantilever is long, and the allowance is large, so that large part deformation can be caused, and the finish machining size guaranteed by the previous procedure is out of tolerance. As a thin-wall baffle part, the thin-wall baffle plate is extremely easy to deform under the action of cutting force in the machining process, and the part is extremely easy to cause out-of-tolerance due to high requirement on the dimensional precision of the part. The problem cannot be solved by a common clamping mode, and the problem of preventing the deformation of thin-wall baffle parts in the machining process is always a difficult problem in the industry. The problem is solved, the processing quality of thin-wall baffle parts can be effectively improved, and the method is significant to the whole aeroengine industry.
Disclosure of Invention
In order to solve the technical problems, the invention provides a machining deformation-preventing clamp for a thin-wall baffle part, which prevents the part from deforming during machining by adding an auxiliary support.
The invention is realized by the following technical scheme.
The invention provides a processing anti-deformation clamp for a thin-wall baffle part, which comprises a positioning clamp body, a pressing hook and a clamp base, wherein the positioning clamp body is annular and is provided with an annular step groove, a part to be processed is arranged in the annular step groove, and the back of the part to be processed at the outer side of the part to be processed is tightly propped against the outermost step surface of the positioning clamp body; the clamp base is fixedly connected with the lower part of the positioning clamp body; the press hook is L-shaped, the upper end of the press hook is buckled on the part to be processed, and the lower end of the press hook penetrates through the clamp base and fastens the part to be processed on the positioning clamp body.
The fixture comprises a fixture base, a hook pressing bolt, a plug seat and a bolt, wherein the plug seat is in a circular truncated cone shape, the fixture base is provided with a stepped hole corresponding to the plug seat, and the plug seat is embedded in the stepped hole arranged on the fixture base; the middle part of the plug seat is provided with an internal thread hole corresponding to the hook pressing bolt, when the plug seat is installed, the hook pressing bolt vertically penetrates through the hook pressing bolt and enters the internal thread hole of the plug seat embedded in the clamp base, and the hook pressing bolt is screwed down to fasten a part to be processed on the positioning clamp body fixedly connected with the clamp base.
Further, still include the screw, the location anchor clamps body is equipped with the counter bore in the bottom of annular step groove, the anchor clamps base is equipped with the internal thread hole that suits with the screw in the department that corresponds, the screw is even as an organic whole with the anchor clamps base in the internal thread hole that sets up in the counter bore screw in anchor clamps base that the anchor clamps body bottom set up.
Furthermore, the press hooks are uniformly distributed on the clamp base in an annular shape.
Furthermore, the screw is a plurality of, is cyclic annular equipartition in the specific bottom of location anchor clamps.
Further, the outer side step ring surface of the positioning clamp body is higher than the inner side step ring surface.
Furthermore, the distance between the step surface on the outer side of the positioning fixture body and the bottom surface of the step on the inner side is larger than the distance between the back surface of the part to be processed and the bottom surface of the part to be processed.
Further, the difference value between the distance between the outer side upper step surface of the positioning fixture body and the bottom surface of the inner side step and the distance between the back surface of the part to be processed and the bottom surface of the part to be processed is 0.01-0.02 mm.
The invention has the beneficial effects that: by implementing the invention, in the processing process of the part, the auxiliary support of the clamp and the distance of interference fit are provided, so that the back of the part is completely attached to the auxiliary support plane when the part is in a compressed state, and the part cannot deform in the cutting process, thereby ensuring that the qualified size processed by the previous finish machining process cannot be damaged, effectively improving the processing quality of the part.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a positioning clamp body of the present invention;
FIG. 3 is a schematic view of the structure of the part to be machined according to the present invention;
in the figure: 1-positioning fixture body, 11-annular step groove, 2-pressing hook, 3-fixture base, 4-screw, 5-part to be processed, 51-part to be processed, 6-plug seat and 7-pressing hook bolt.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1-2, a processing anti-deformation clamp for a thin-wall baffle part comprises a positioning clamp body 1, a pressing hook 2 and a clamp base 3, wherein the positioning clamp body 1 is annular and is provided with an annular step groove 11, a part 5 to be processed is installed in the annular step groove 11, the outer side step ring surface of the positioning clamp body 1 is higher than the inner side step ring surface, and the back of the part 51 to be processed on the outer side of the part 5 to be processed is tightly pressed on the outermost side step surface of the positioning clamp body 1; the clamp base 3 is fixedly connected with the lower part of the positioning clamp body 1; the press hook 2 is L-shaped, the upper end of the press hook is buckled on the part 5 to be processed, and the lower end of the press hook penetrates through the clamp base 3 and fastens the part 5 to be processed on the positioning clamp body 1.
The clamp is characterized by further comprising a hook pressing bolt 7 and a plug seat 6, wherein the plug seat 6 is in a circular truncated cone shape, the clamp base 3 is provided with a step hole corresponding to the plug seat 6, and the plug seat 6 is embedded in the step hole arranged in the clamp base 3; the internal thread hole that stopper seat 6 middle part was equipped with and pressed hook bolt 7 to correspond, when installing, presses hook bolt 7 to pass perpendicularly and press hook 2 and go into the internal thread hole of embedding stopper seat 6 in the anchor clamps base 3, presses hook bolt 7 to make through screwing up and press hook 2 will wait to process part 5 and fasten on the location anchor clamps body 1 with anchor clamps base 3 fixed connection.
The fixture comprises a fixture body 1 and is characterized by further comprising a screw 4, wherein a counter bore is formed in the bottom of the annular stepped groove 11 of the fixture body 1, an inner threaded hole matched with the screw 4 is formed in a corresponding position of the fixture base 3, and the screw 4 is screwed into the inner threaded hole formed in the fixture base 3 through the counter bore formed in the bottom of the fixture body 1 to connect the fixture body 1 and the fixture base 3 into a whole.
The press hooks 2 are annularly and uniformly distributed on the clamp base 3. The number of the screws 4 is a plurality, and the screws 4 are uniformly distributed at the bottom of the positioning fixture body 1 in an annular shape, and in the embodiment, the number of the screws 4 is 6.
As shown in fig. 2 and 3, the distance between the outer upper step surface and the inner step bottom surface of the positioning fixture body 1 is a, the distance between the back surface of the part to be machined 51 of the part 5 to be machined and the bottom surface of the part to be machined 5 is B, and in order to ensure that the part to be machined 5 completely clings to the positioning fixture body 1 in a compressed state, it is necessary to ensure that a is equal to B +0.01-0.02mm for providing auxiliary support; meanwhile, a higher flatness is kept between two step surfaces of the positioning clamp body 1, so that the part 5 to be machined is prevented from clamping and deforming in the clamping process, the pressing hook 2 penetrates through the clamp base 3 and the positioning clamp body 1 to press the part, the jumping of two end surfaces of the positioning clamp body 1 is guaranteed within 0.01-0.015 mm, the rigidity of the part in machining is enhanced, and the part is prevented from deforming.
When processing, will wait to process part 5 and install on the location anchor clamps body 1, again with the location anchor clamps body 1 through pressing hook 2 treat that processing part 5 compresses tightly on the location anchor clamps body 1 to with 3 fixed connection of anchor clamps base, install whole anchor clamps on the lathe again afterwards and process. At the moment, in the machining process of the part, the auxiliary support of the clamp is provided, and the interference fit distance of 0.01 ensures that the back surface of the part to be machined 5 is completely attached to the support plane when the part is in a compressed state. The part 5 to be machined is not deformed during the cutting process, thereby ensuring that the qualified dimension machined by the previous finishing process cannot be damaged. Therefore, the processing quality of the parts is effectively improved, the fixture has high popularization value for processing the similar thin-wall baffle parts, and obvious effect is obtained through the practical examination of the part processing. The processing deformation of the parts is greatly prevented, and the size precision of the manufactured products is ensured.
Claims (8)
1. The utility model provides a processing of a thin wall baffle part clamp of preapring for an unfavorable turn of events, its characterized in that: comprises a positioning clamp body, a press hook and a clamp base,
the positioning fixture body is annular and is provided with an annular step groove, a part to be machined is arranged in the annular step groove, and the back of the part to be machined on the outer side of the part to be machined is tightly propped against the outermost step surface of the positioning fixture body;
the clamp base is fixedly connected with the lower part of the positioning clamp body; the press hook is L-shaped, the upper end of the press hook is buckled on the part to be processed, and the lower end of the press hook penetrates through the clamp base and fastens the part to be processed on the positioning clamp body.
2. A processing deformation preventing jig for a thin-walled baffle plate part according to claim 1, characterized in that: the fixture comprises a fixture base, a hook pressing bolt, a plug seat and a bolt, wherein the plug seat is in a circular truncated cone shape, the fixture base is provided with a stepped hole corresponding to the plug seat, and the plug seat is embedded in the stepped hole arranged on the fixture base; the middle part of the plug seat is provided with an internal thread hole corresponding to the hook pressing bolt, when the plug seat is installed, the hook pressing bolt vertically penetrates through the hook pressing bolt and enters the internal thread hole of the plug seat embedded in the clamp base, and the hook pressing bolt is screwed down to fasten a part to be processed on the positioning clamp body fixedly connected with the clamp base.
3. A processing deformation preventing jig for a thin-walled baffle plate part according to claim 1, characterized in that: the fixture comprises a fixture body and is characterized by further comprising a screw, wherein a counter bore is formed in the bottom of the annular stepped groove, an inner threaded hole matched with the screw is formed in the corresponding position of the fixture base, and the screw is connected with the fixture body and the fixture base into a whole through the counter bore arranged at the bottom of the fixture body and screwed into the inner threaded hole formed in the fixture base.
4. A processing deformation preventing jig for a thin-walled baffle plate part according to claim 1, characterized in that: the pressing hooks are annularly and uniformly distributed on the clamp base.
5. A processing deformation preventing jig for a thin-walled baffle plate part according to claim 3, characterized in that: the screws are annularly and uniformly distributed at the bottom of the positioning clamp body.
6. A processing deformation preventing jig for a thin-walled baffle plate part according to claim 1, characterized in that: the outer side step ring surface of the positioning clamp body is higher than the inner side step ring surface.
7. A processing deformation preventing jig for a thin-walled baffle plate part according to claim 1, characterized in that: the distance between the outer upper step surface of the positioning fixture body and the bottom surface of the inner step is larger than the distance between the back surface of the part to be processed and the bottom surface of the part to be processed.
8. A processing anti-deformation clamp for a thin-wall baffle plate part according to claim 7, characterized in that: the difference value between the distance between the outer upper step surface of the positioning fixture body and the bottom surface of the inner step and the distance between the back surface of the part to be processed and the bottom surface of the part to be processed is 0.01-0.02 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110732053.2A CN113369937A (en) | 2021-06-29 | 2021-06-29 | A processing clamp of preapring for an unfavorable turn of events for thin wall baffle part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110732053.2A CN113369937A (en) | 2021-06-29 | 2021-06-29 | A processing clamp of preapring for an unfavorable turn of events for thin wall baffle part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113369937A true CN113369937A (en) | 2021-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110732053.2A Pending CN113369937A (en) | 2021-06-29 | 2021-06-29 | A processing clamp of preapring for an unfavorable turn of events for thin wall baffle part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113369937A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3329942C1 (en) * | 1983-08-19 | 1984-09-20 | Albert Meywald Kg, 3548 Arolsen | Clamping device in particular for workpieces to be machined |
| CN103586710A (en) * | 2013-11-11 | 2014-02-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Deformation-resistant clamp for machining thin-wall cone |
| CN104476245A (en) * | 2014-11-10 | 2015-04-01 | 沈阳黎明航空发动机(集团)有限责任公司 | Assembling method and device for thin-wall box |
| CN205085700U (en) * | 2015-11-04 | 2016-03-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Digital control processing anchor clamps of dysmorphism silk braid |
| CN107790830A (en) * | 2017-11-24 | 2018-03-13 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of honeycomb processing method of thin-walled honeycomb class part |
| CN109352364A (en) * | 2018-12-10 | 2019-02-19 | 中国航发贵州黎阳航空动力有限公司 | A kind of reverse drawing fixture |
| CN209175307U (en) * | 2018-12-12 | 2019-07-30 | 中国航发湖南南方宇航工业有限公司 | A kind of ring-shaped thin-walled part fixture |
| CN211053151U (en) * | 2019-11-19 | 2020-07-21 | 中国航发贵州黎阳航空动力有限公司 | A compact structure for thin wall part |
-
2021
- 2021-06-29 CN CN202110732053.2A patent/CN113369937A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3329942C1 (en) * | 1983-08-19 | 1984-09-20 | Albert Meywald Kg, 3548 Arolsen | Clamping device in particular for workpieces to be machined |
| CN103586710A (en) * | 2013-11-11 | 2014-02-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Deformation-resistant clamp for machining thin-wall cone |
| CN104476245A (en) * | 2014-11-10 | 2015-04-01 | 沈阳黎明航空发动机(集团)有限责任公司 | Assembling method and device for thin-wall box |
| CN205085700U (en) * | 2015-11-04 | 2016-03-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Digital control processing anchor clamps of dysmorphism silk braid |
| CN107790830A (en) * | 2017-11-24 | 2018-03-13 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of honeycomb processing method of thin-walled honeycomb class part |
| CN109352364A (en) * | 2018-12-10 | 2019-02-19 | 中国航发贵州黎阳航空动力有限公司 | A kind of reverse drawing fixture |
| CN209175307U (en) * | 2018-12-12 | 2019-07-30 | 中国航发湖南南方宇航工业有限公司 | A kind of ring-shaped thin-walled part fixture |
| CN211053151U (en) * | 2019-11-19 | 2020-07-21 | 中国航发贵州黎阳航空动力有限公司 | A compact structure for thin wall part |
Non-Patent Citations (2)
| Title |
|---|
| 吴拓编著: "《现代机床夹具典型结构实用图册》", 31 October 2015 * |
| 朱耀祥，浦林祥主编: "《现代夹具设计手册》", 28 February 2010 * |
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Application publication date: 20210910 |