CN111438416A - Positioning device for brazing thin-wall metal plate multilayer structural part - Google Patents
Positioning device for brazing thin-wall metal plate multilayer structural part Download PDFInfo
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- CN111438416A CN111438416A CN201911228994.1A CN201911228994A CN111438416A CN 111438416 A CN111438416 A CN 111438416A CN 201911228994 A CN201911228994 A CN 201911228994A CN 111438416 A CN111438416 A CN 111438416A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/087—Soldering or brazing jigs, fixtures or clamping means
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Abstract
The invention discloses a positioning device for brazing a thin-wall metal plate multilayer structural part, belonging to the technical field of engine manufacturing, and comprising: the device comprises a base, a support ring, a support seat, a positioning table, an expansion core, an expansion flap, a stud and a pressing plate; the base is provided with three layers of annular step surfaces, namely a first step surface, a second step surface and a third step surface from bottom to top; the support ring is arranged on the second step surface of the base, the annular support seat is arranged on the third step surface of the base, and the cylindrical positioning table is arranged on the upper end surface of the base; the circular truncated cone-shaped expansion core is coaxially arranged on the positioning table through the double-end stud; more than two expansion flaps form a circular ring, and the inner circumferential surface of the circular ring is matched with the outer circumferential surface of the expansion core; the circular ring formed by more than two expansion flaps is positioned on the upper surface of the positioning table and is sleeved outside the expansion core; the positioning device can realize the positioning of the multilayer thin-wall sheet metal component and prevent each part from dislocation and deformation in the high-temperature brazing process.
Description
Technical Field
The invention belongs to the technical field of engine manufacturing, and particularly relates to a positioning device for brazing a thin-wall metal plate multilayer structural part.
Background
The engine thin wall sheet metal multilayer structure radially includes that 3 layers and above sheet metal structures cup joint, and the axial includes 3 steps and above sheet metal structure overlap joints, the thickness of thin wall sheet metal component is about 0.5mm ~ 1.2 mm. The brazing difficulty of the multi-layer multi-step thin-wall sheet metal structural part is extremely high under the influence of the sheet metal part structure; the forming precision of the thin-wall sheet metal part can hardly meet the requirement of a brazing gap, and the thin-wall sheet metal part is easy to deform under the action of thermal stress and structural stress of a component under the high-temperature brazing environment, so that the problems that the radial gap is large and cannot be ensured, the axial height is not easy to ensure and the like are caused, and the processing precision and the qualification rate of the thin-wall sheet metal component are influenced.
Disclosure of Invention
In view of the above, the invention provides a positioning device for brazing a thin-wall sheet metal multilayer structural member, which can position the multilayer thin-wall sheet metal member and prevent each part from dislocation and deformation in a high-temperature brazing process according to the structural characteristics of the thin-wall sheet metal multilayer member and the requirements of radial gap control and axial height control of the multilayer thin-wall sheet metal member.
The invention is realized by the following technical scheme:
a positioning device for brazing a thin-wall sheet metal multilayer structural part is characterized in that the thin-wall sheet metal multilayer structural part is formed by coaxially sleeving more than three layers of thin-wall sheet metal parts with different axial heights and then welding the thin-wall sheet metal parts together through high-temperature brazing; the positioning device includes: the device comprises a base, a support ring, a support seat, a positioning table, an expansion core, an expansion flap, a stud and a pressing plate;
the base is a cylinder with the diameter larger than the outer diameter of the thin-wall sheet metal multilayer structural part; three layers of annular step surfaces coaxial with the annular step surfaces are arranged on the first step surface, the second step surface and the third step surface from bottom to top respectively;
the supporting ring is arranged on the second step surface of the base, the annular supporting seat is arranged on the third step surface of the base, the cylindrical positioning table is arranged on the upper end surface of the base, and the supporting ring, the supporting seat and the positioning table are coaxial; an annular step surface is processed on the outer circumferential surface of the supporting seat;
the circular truncated cone-shaped expansion core is coaxially arranged on the positioning table through the stud, and the direction of the small diameter end of the expansion core is downward; more than two expansion flaps form a circular ring, and the inner circumferential surface of the circular ring is matched with the outer circumferential surface of the expansion core; the circular ring formed by more than two expansion flaps is positioned on the upper surface of the positioning table and is sleeved outside the expansion core; when the expansion core moves downwards under the action of the stud, the outer diameter of a circular ring formed by more than two expansion lobes is increased;
before the positioning device for brazing is adopted, except the thin-wall sheet metal parts on the outermost layer and the innermost layer in the thin-wall sheet metal multilayer structural part, other thin-wall sheet metal parts are welded together in advance to form a middle-layer thin-wall sheet metal component;
the thin-wall sheet metal multilayer structural part is coaxially sleeved on the base, wherein the folded edge at the bottom end of the thin-wall sheet metal part at the outermost layer is positioned on the first step surface of the base and is attached to the first step surface through the pressing plate; a set gap is reserved between the inner circumferential surface of the thin-wall sheet metal part on the outermost layer and the outer circumferential surface of the support ring, and when the support ring expands at high temperature, the support ring pushes against the inner circumferential surface of the thin-wall sheet metal part on the outermost layer; the bottom end of the middle-layer thin-wall sheet metal component is supported on the step surface of the outer circumferential surface of the supporting seat, a set gap is reserved between the inner circumferential surface of the middle-layer thin-wall sheet metal component and the outer circumferential surface of the upper part of the step surface of the supporting seat, and the supporting seat is abutted against the inner circumferential surface of the middle-layer thin-wall sheet metal component when expanding at high temperature; the thin-wall sheet metal part on the innermost layer is positioned outside a circular ring formed by more than two expansion lobes, and the bottom end of the thin-wall sheet metal part on the innermost layer is supported on the positioning table; by moving the expansion core downwards, the outer diameter of a ring formed by more than two expansion lobes is increased, and the thin-wall sheet metal part on the innermost layer is expanded.
Furthermore, the thermal expansion coefficients of the base, the support ring, the support seat, the positioning table, the expansion core, the expansion valve and the stud are the same and are all higher than that of the thin-wall sheet metal multilayer structural part.
Furthermore, the support ring, the support seat, the positioning table and the pressing plate are all installed on the base through screws.
Furthermore, an annular groove for positioning is machined in the second step surface of the base, and the support ring is installed at the bottom of the annular groove.
Furthermore, a circular groove for positioning is processed on the upper end face of the base, and the positioning table is installed at the bottom of the circular groove.
Furthermore, a stepped blind hole for reducing weight is machined in the lower end face of the base.
Has the advantages that: the base, the step surface of the supporting seat and the positioning table can realize the positioning of the axial height of each component of the thin-wall sheet metal multilayer structural part; the support ring, the support seat, the expansion valve and the expansion core can realize the positioning of radial gaps of all parts of the thin-wall sheet metal multilayer structural part; the method can prevent the dislocation of each part of the thin-wall metal plate multilayer structural part in the brazing process, and has the advantages of accurate and reliable positioning, strong applicability, simple and convenient operation and the like.
Drawings
FIG. 1 is a structural component diagram of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic structural view of a base;
FIG. 4 is a schematic structural view of the thin-wall sheet metal multi-layer structure of the present invention during assembly;
FIG. 5 is an enlarged fragmentary view of the expansion core and expansion lobe of FIG. 4;
FIG. 6 is a partial enlarged view of the folded edge of the bottom end of the thin-wall sheet metal part in FIG. 4;
the device comprises a base 1, a support ring 2, a support seat 3, a positioning table 4, an expansion core 5, an expansion flap 6, a stud 7 and a pressing plate 9.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides a positioning device for brazing a thin-wall sheet metal multilayer structural part, wherein the thin-wall sheet metal multilayer structural part is formed by coaxially sleeving more than three layers of thin-wall sheet metal parts with different axial heights and then welding the thin-wall sheet metal parts together through high-temperature brazing; therefore, before the sleeved thin-wall sheet metal part is placed into a high-temperature furnace for high-temperature brazing, the radial clearance and the axial height between more than three layers of thin-wall sheet metal parts are positioned, and the size of the sheet metal part cannot be influenced in the high-temperature brazing process;
the positioning device is used for axially and radially positioning the sheet metal part with more than three layers of thin walls, referring to the attached drawings 1 and 2, and comprises the following components: the device comprises a base 1, a support ring 2, a support base 3, a positioning table 4, an expansion core 5, an expansion flap 6, a stud 7 and a pressing plate 9;
referring to the attached figure 3, the base 1 is a cylinder with the diameter larger than the outer diameter of the thin-wall sheet metal multilayer structural part; three layers of annular step surfaces are arranged on the base, the annular step surfaces are an a surface, a b surface and a d surface from bottom to top respectively, and the upper end surface of the base 1 is an e surface; a coaxial annular groove for positioning is processed on the surface b, and the bottom of the annular groove is a surface c; a coaxial circular groove for positioning is processed on the e surface, and the bottom of the circular groove is an f surface; more than two axial threaded holes distributed along the circumferential direction of the surface a are processed on the surface a and used for installing a pressing plate 9 to determine the position of a chassis of the thin-wall sheet metal multilayer structural part; more than two first axial mounting holes distributed along the circumferential direction of the c surface are processed on the c surface and used for positioning the support ring 2; more than two second axial mounting holes distributed along the circumferential direction of the d surface are processed on the d surface and used for positioning the supporting seat 3; more than two third axial mounting holes distributed along the circumferential direction of the f surface are processed on the f surface and used for positioning the positioning table 4; the lower end surface of the base 1 is provided with a coaxial stepped blind hole for reducing weight;
the support ring 2 is arranged on the surface c of the base 1 through a screw arranged in a first axial mounting hole, the annular support seat 3 is arranged on the surface d of the base 1 through a screw arranged in a second axial mounting hole, the cylindrical positioning table 4 is arranged on the surface f of the base 1 through a screw arranged in a third axial mounting hole, and the support ring 2, the support seat 3 and the positioning table 4 are coaxial; an annular step surface is processed on the outer circumferential surface of the supporting seat 3;
the circular truncated cone-shaped expansion core 5 is coaxially arranged on the positioning table 4 through the stud 7, and the direction of the small-diameter end of the expansion core 5 is downward; more than two expansion flaps 6 form a circular ring, and the inner circumferential surface of the circular ring is matched with the outer circumferential surface of the expansion core 5, namely the cone angle of the inner circumferential surface of the circular ring is the same as that of the outer circumferential surface of the expansion core 5; a circular ring consisting of more than two expansion flaps 6 is positioned on the upper surface of the positioning table 4 and is sleeved outside the expansion core 5; when the expansion core 5 moves downwards under the action of the stud 7, the outer diameter of a circular ring formed by more than two expansion flaps 6 is increased; in this embodiment, the number of the expansion flaps 6 is three;
referring to the attached drawings 4-6, more than three layers of thin-wall sheet metal parts after the sleeving are installed on the base 1, and the folded edge at the bottom end of the thin-wall sheet metal part at the outermost layer is positioned on the surface a of the base 1; the pressing plate 9 is installed on the surface a of the base 1 through screws and tightly presses the folded edge, so that the folded edge at the bottom end of the thin-wall sheet metal part on the outermost layer is tightly attached to the surface a of the base 1, and the axial displacement and the radial displacement of the thin-wall sheet metal part on the outermost layer are limited; a set gap is reserved between the inner circumferential surface of the thin-wall sheet metal part on the outermost layer and the outer circumferential surface of the support ring 2, and when the support ring 2 expands at high temperature, the support ring can abut against the inner circumferential surface of the thin-wall sheet metal part on the outermost layer to expand and support the thin-wall sheet metal part on the outermost layer; the bottom end of the thin-wall sheet metal part of the middle layer is supported on the step surface of the outer circumferential surface of the supporting seat 3, a set gap is reserved between the inner circumferential surface of the thin-wall sheet metal part of the middle layer and the outer circumferential surface of the upper part of the step surface of the supporting seat 3, and when the supporting seat 3 expands at high temperature, the thin-wall sheet metal part of the middle layer can be abutted against the inner circumferential surface of the thin-wall sheet metal part of the middle layer to expand and support the thin-; the thin-wall sheet metal part of the middle layer consists of more than one layer of thin-wall sheet metal parts which are welded in advance; (ii) a The thin-wall sheet metal part at the innermost layer is positioned outside a circular ring formed by more than two expansion flaps 6, and the bottom end of the thin-wall sheet metal part at the innermost layer is supported on the positioning table 4; the expansion core 5 is moved downwards, so that the outer diameter of a ring formed by more than two expansion flaps 6 is increased, and the thin-wall sheet metal part at the innermost layer is expanded and supported;
the thermal expansion coefficients of the base 1, the support ring 2, the support seat 3, the positioning table 4, the expansion core 5, the expansion valve 6 and the stud 7 are the same and are all higher than that of the thin-wall sheet metal multilayer structural part.
The installation process of the positioning device is as follows:
firstly, respectively installing a support ring 2, a support base 3 and a positioning table 4 on a base 1;
secondly, mounting more than two layers of thin-wall sheet metal parts after the sleeving on the base 1, wherein the folded edge at the bottom end of the thin-wall sheet metal part at the outermost layer is positioned on the surface a of the base 1; the pressing plate 9 is arranged on the base 1 through a screw and presses the folded edge tightly; a set gap is reserved between the inner circumferential surface of the thin-wall sheet metal part at the outermost layer and the outer circumferential surface of the support ring 2, and the bottom end of the thin-wall sheet metal part at the middle layer is supported on the step surface of the outer circumferential surface of the support base 3; a set gap is reserved between the inner circumferential surface of the thin-wall metal plate of the middle layer and the outer circumferential surface of the supporting seat 3;
thirdly, a circular ring consisting of more than two expansion flaps 6 is placed on the upper surface of the positioning table 4 and is positioned in the thin-wall sheet metal part at the innermost layer;
fourthly, placing the expansion core 5 in the inner circumferential surface of a circular ring formed by more than two expansion flaps 6, and installing the expansion core on the positioning table 4 through a stud 7;
fifthly, the expansion core 5 moves downwards through the stud 7, the outer diameter of a circular ring formed by more than two expansion flaps 6 is enlarged, and the outer circumferential surface of the circular ring is abutted against the inner circumferential surface of the innermost thin-wall sheet metal part; the positioning device is used for assembling more than two layers of thin-wall sheet metal parts after the sleeving is finished;
and sixthly, coating brazing filler metal at the joint of more than two layers of thin-wall sheet metal parts, and then putting the sheet metal parts into a furnace for high-temperature brazing after the brazing filler metal is coated.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A positioning device for brazing a thin-wall sheet metal multilayer structural part is characterized in that the thin-wall sheet metal multilayer structural part is formed by coaxially sleeving more than three layers of thin-wall sheet metal parts with different axial heights and then welding the thin-wall sheet metal parts together through high-temperature brazing; characterized in that, the positioner includes: the device comprises a base (1), a support ring (2), a support seat (3), a positioning table (4), an expansion core (5), an expansion flap (6), a stud (7) and a pressing plate (9);
the base (1) is a cylinder with the diameter larger than the outer diameter of the thin-wall sheet metal multilayer structural part; three layers of annular step surfaces coaxial with the annular step surfaces are arranged on the first step surface, the second step surface and the third step surface from bottom to top respectively;
the support ring (2) is arranged on the second step surface of the base (1), the annular support seat (3) is arranged on the third step surface of the base (1), the cylindrical positioning table (4) is arranged on the upper end surface of the base (1), and the support ring (2), the support seat (3) and the positioning table (4) are coaxial; an annular step surface is processed on the outer circumferential surface of the supporting seat (3);
the circular truncated cone-shaped expansion core (5) is coaxially arranged on the positioning table (4) through the stud (7), and the direction of the small diameter end of the expansion core (5) is downward; more than two expansion flaps (6) form a circular ring, and the inner circumferential surface of the circular ring is matched with the outer circumferential surface of the expansion core (5); a circular ring consisting of more than two expansion flaps (6) is positioned on the upper surface of the positioning table (4) and sleeved outside the expansion core (5); when the expansion core (5) moves downwards under the action of the double-end stud (7), the outer diameter of a circular ring formed by more than two expansion flaps (6) is enlarged;
before the positioning device for brazing is adopted, except the thin-wall sheet metal parts on the outermost layer and the innermost layer in the thin-wall sheet metal multilayer structural part, other thin-wall sheet metal parts are welded together in advance to form a middle-layer thin-wall sheet metal component;
the thin-wall sheet metal multilayer structural part is coaxially sleeved on the base (1), wherein the folded edge at the bottom end of the outermost thin-wall sheet metal part is positioned on a first step surface of the base (1) and is attached to the first step surface through a pressing plate (9); a set gap is reserved between the inner circumferential surface of the thin-wall sheet metal part at the outermost layer and the outer circumferential surface of the support ring (2), and when the support ring (2) expands at high temperature, the support ring pushes against the inner circumferential surface of the thin-wall sheet metal part at the outermost layer; the bottom end of the middle-layer thin-wall sheet metal component is supported on the step surface of the outer circumferential surface of the supporting seat (3), a set gap is reserved between the inner circumferential surface of the middle-layer thin-wall sheet metal component and the outer circumferential surface of the upper part of the step surface of the supporting seat (3), and the middle-layer thin-wall sheet metal component is abutted against the inner circumferential surface of the middle-layer thin-wall sheet metal component when the supporting seat (3) expands at high temperature; the thin-wall sheet metal part at the innermost layer is positioned outside a circular ring formed by more than two expansion flaps (6), and the bottom end of the thin-wall sheet metal part at the innermost layer is supported on the positioning table (4); by moving the expansion core (5) downwards, the outer diameter of a circular ring formed by more than two expansion flaps (6) is increased, and the thin-wall sheet metal part at the innermost layer is expanded.
2. The positioning device for brazing the thin-wall sheet metal multilayer structural part according to claim 1, wherein the base (1), the support ring (2), the support base (3), the positioning table (4), the expansion core (5), the expansion flap (6) and the stud (7) have the same thermal expansion coefficient and are higher than that of the thin-wall sheet metal multilayer structural part.
3. The positioning device for brazing the thin-wall sheet metal multilayer structural part according to claim 1, wherein the support ring (2), the support base (3), the positioning table (4) and the pressing plate (9) are all mounted on the base (1) through screws.
4. The positioning device for brazing the thin-wall sheet metal multilayer structural part according to claim 1, wherein an annular groove for positioning is machined in the second step surface of the base (1), and the support ring (2) is installed at the bottom of the annular groove.
5. The positioning device for brazing the thin-wall sheet metal multilayer structural part according to claim 1, wherein a circular groove for positioning is processed on the upper end face of the base (1), and the positioning table (4) is installed at the bottom of the circular groove.
6. The positioning device for brazing the thin-wall sheet metal multilayer structural part according to claim 1, wherein a stepped blind hole for reducing weight is processed on the lower end surface of the base (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911228994.1A CN111438416B (en) | 2019-12-04 | 2019-12-04 | Positioning device for brazing thin-wall metal plate multilayer structural part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911228994.1A CN111438416B (en) | 2019-12-04 | 2019-12-04 | Positioning device for brazing thin-wall metal plate multilayer structural part |
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| CN111438416A true CN111438416A (en) | 2020-07-24 |
| CN111438416B CN111438416B (en) | 2021-06-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114393273A (en) * | 2022-03-04 | 2022-04-26 | 安徽机电职业技术学院 | Positioning device for brazing thin-wall metal plate multilayer structural part |
| CN115007961A (en) * | 2022-06-29 | 2022-09-06 | 中国航发动力股份有限公司 | Increase composite set of annular part volume of advancing stove during high temperature vacuum brazing |
| CN115283937A (en) * | 2022-07-21 | 2022-11-04 | 中国航发成都发动机有限公司 | Thin-wall annular sheet metal part assembling device and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393273A (en) * | 2022-03-04 | 2022-04-26 | 安徽机电职业技术学院 | Positioning device for brazing thin-wall metal plate multilayer structural part |
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| CN115283937B (en) * | 2022-07-21 | 2023-11-10 | 中国航发成都发动机有限公司 | Thin-wall annular sheet metal part assembling device and method |
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| CN111438416B (en) | 2021-06-15 |
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