CN115383378A - Self-positioning welding fixture and welding method for turbine assembly - Google Patents
Self-positioning welding fixture and welding method for turbine assembly Download PDFInfo
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- CN115383378A CN115383378A CN202210893126.0A CN202210893126A CN115383378A CN 115383378 A CN115383378 A CN 115383378A CN 202210893126 A CN202210893126 A CN 202210893126A CN 115383378 A CN115383378 A CN 115383378A
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/001—Turbines
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a self-positioning welding fixture for a turbine assembly, which comprises a first positioning assembly, a positioning shaft and a second positioning assembly, wherein the first positioning assembly is fixed on the first positioning shaft; the first positioning component is provided with a first elastic positioning structure which can be radially folded under the action of external force to clamp the outer ring surface of the first component to enable the first component and the outer ring surface to be coaxial; the second positioning assembly is provided with a second elastic positioning structure to clamp the third component to enable the third component and the second component to be coaxial; the axis position of the first elastic positioning structure is provided with a shaft positioning structure matched with the positioning shaft in a radial positioning mode, and the axis position of the second elastic positioning structure is provided with a shaft mounting structure used for positioning and fixing the positioning shaft. Through using this welding jig, based on first elastic locating structure and the cooperation of first part, second elastic locating structure and third part cooperation, first elastic locating mechanism, the coaxial and then make first part, third part of second elastic locating structure are coaxial, guarantee turbine assembly welded axiality requirement, more improve the welding process precision, weaken the welding deformation influence.
Description
Technical Field
The invention relates to the technical field of turbine assembly welding, in particular to a self-positioning welding fixture for a turbine assembly. In addition, the invention also relates to a welding method applying the self-positioning welding fixture for the turbine assembly.
Background
The turbine assembly of the swirler assembly of the engine comprises a first part 1, a second part 2 and a third part 3 which are sequentially connected and are annular; as shown in fig. 1 and fig. 2, the inner annular surface of the second part 2 has a tapered surface with a gradually decreasing outer diameter protruding in the direction of the second end surface, an annular protrusion 101 is formed at the edge of one end surface of the first part 1, the diameter of the inner annular surface of the annular protrusion 101 is adapted to the outer diameter of the second part 2, the inner annular surface of the first part 1 is adapted to the maximum outer diameter of the tapered surface, the first part 1 covers the second part 2, the end surface of the annular protrusion 101 of the first part 1 abuts against the end surface of the third part 3, the inner annular surface of the third part 3 protrudes in the direction of the other end surface, the outer diameter of the inner annular surface of the third part 3 is gradually decreased outwards, and the first part 1 and the third part 3 are connected by adopting 4-section 2cm long uniform fillet welds in the circumferential direction; as shown in fig. 3, the coaxiality of the first member 1 and the third member 3 after welding is ensured to be 0.15.
In the prior art, in order to ensure the coaxiality of the first component 1 and the third component 3, a welding fixture is generally used for positioning, as shown in fig. 4 and 5, a positioning pressure plate takes Φ D as a positioning reference, the contact surface Φ C of the first component 1 and the positioning pressure plate is ensured to be not more than 0.03 coaxial with the positioning reference a, and the first component 1 and the third component 3 are constrained simultaneously in the welding process to ensure the coaxiality.
As shown in fig. 3 to 5, since the tolerance zone between the first member 1 and the third member 3 is large, a full-circle gap of 0.35mm is formed between the contact surface of the first member 1 and the positioning platen 71 in the limit state, and the coaxiality of 0.15 cannot be ensured even without considering the manufacturing accuracy of the tool and the deformation of the parts after welding.
Disclosure of Invention
The invention provides a self-positioning welding fixture and a welding method for a turbine assembly, and aims to solve the technical problem that the coaxiality of the turbine assembly does not meet the requirement in the conventional welding mode.
The technical scheme adopted by the invention is as follows:
a self-positioning welding fixture for a turbine assembly at least comprises a first part, a second part and a third part which are sequentially connected and are annular; the first end face of first part border is formed with annular protrusion, and first part lid fits the second part and the annular protrusion of first part and the second end face butt of third part and waits to weld, from the positioning welding jig include:
the positioning device comprises a first positioning component, a positioning shaft and a second positioning component;
the first end of the first positioning assembly is provided with a first elastic positioning structure, and the first elastic positioning structure is used for radially drawing in the outer ring surface of the first component under the action of external force to clamp the first component so as to enable the first component and the first elastic positioning structure to be positioned on the same axis;
one end of the second positioning component facing the first positioning component is provided with a cavity part for accommodating the turbine component; the second positioning assembly is provided with a second elastic positioning structure, and the second elastic positioning structure is radially folded on the outer ring surface of the third component under the action of external force to clamp the third component, so that the third component and the second elastic positioning structure are positioned on the same axis;
the first positioning assembly is provided with a shaft positioning structure matched with the positioning shaft in a radial positioning mode at the axis position of the first elastic positioning structure, and the second positioning assembly is provided with a shaft mounting structure used for fixing the positioning shaft in a radial positioning mode at the axis position of the second elastic positioning structure.
As a preferable mode, the first positioning component comprises a cylindrical or tubular positioning part and a tubular first pressing part which is matched with the positioning part and sleeved on the positioning part; the first elastic positioning structure comprises clamping pieces formed on the end face of the positioning piece, and the clamping pieces are uniformly distributed in an annular shape along the edge of the end face of the positioning piece; the inner wall surface of the closing end of the clamping piece is provided with a first step structure, the axial size of the first step structure is matched with the thickness of the first component, and the inner ring surface of the first step structure is used for clamping the outer ring surface of the first component; the clamping piece is formed by an inclined plane structure formed by the protrusion of the outer wall surface of the furling end, and an inner conical surface matched with the gradient of the inclined plane structure of the clamping piece is formed on the inner wall of the end part of the first pressing piece and used for driving the clamping piece to furl radially when the first pressing piece sleeved on the positioning piece moves axially towards the large end of the inclined plane structure.
As a preferable mode, a welding window or a welding gap for a welding gun to pass through is formed in the outer wall of one end, clamping the first component, of the first pressing piece, and the position, in the gap between every two adjacent clamping pieces, of the first pressing piece is located.
As a preferable mode, the positioning element is radially provided with a first pin hole, and the first pressing element is provided with a kidney-shaped hole at a position corresponding to the first pin hole, so as to limit the relative rotation and the relative axial movement of the positioning element and the first pressing element.
As a preferable mode, the first positioning assembly further comprises a driving member for driving the first pressing member to move axially, the free end of the positioning member has a threaded section, the driving member comprises a nut in threaded connection with the threaded section of the positioning member, and a pressing plate for pressing the end surface of the first pressing member is formed on the radial protrusion of the nut and is used for driving the first pressing member to move axially towards the furling end of the positioning member when the nut is screwed.
As a preferable mode, the first positioning component further comprises a stud, an internal thread matched with the stud is further arranged at the axis position of the thread section of the positioning piece, and the inner end face of the large end of the stud is pressed on the free end face of the nut; and the axle center position of the stud is provided with an axle positioning hole matched with the outer diameter of the small end of the positioning shaft and used for penetrating and radially positioning the small end of the positioning shaft.
As a preferable mode, the second positioning assembly comprises a base and a supporting cylinder, wherein one end of the base is provided with a positioning cavity with an opening; the inner diameter of the supporting cylinder is matched with the outer diameter of the large end of the positioning shaft, and the supporting cylinder is used for radially limiting the positioning shaft and is fixed in a positioning cavity of the base through a connecting piece; the supporting cylinder is used for supporting the turbine assembly; the elastic positioning structure comprises an elastic clamping cylinder arranged in the positioning cavity and a second pressing piece connected to the opening end of the base; the inner wall of the furling end of the elastic clamping cylinder is used for clamping the outer ring surface of the third component; the outer wall surface of the furling end of the elastic clamping cylinder protrudes to form an outer conical surface, the inner wall of the second pressing piece protrudes to form an inner conical surface matched with the outer conical surface, and the second pressing piece drives the elastic clamping cylinder to furl radially when moving axially towards the large end of the inner conical surface.
As a preferable mode, the large end of the positioning shaft is provided with a first shaft shoulder, the inner wall of one end of the supporting cylinder connected with the base is provided with a second step structure, and the inner diameter and the height of the second step structure are respectively matched with the outer diameter and the thickness of the first shaft shoulder.
As a preferable mode, the side wall of the base and the side wall of the elastic clamping barrel are respectively provided with a second pin hole at a corresponding height position, and the second pin holes are used for inserting a cylindrical pin so as to prevent the second pressing piece from driving the elastic clamping barrel to rotate.
According to another aspect of the present invention, there is also provided a welding method using the welding jig as described above, including the steps of:
s1, positioning and assembling the large end of a positioning shaft at the axis position of a second elastic positioning structure by using a second positioning assembly;
s2, enabling the small end of the positioning shaft to penetrate through the turbine assembly, placing the turbine assembly on a second positioning assembly, and drawing and clamping a third part through a second elastic positioning structure to enable the third part to be coaxial with the second elastic positioning structure;
before the step S1 or S2 or S3, the first part is radially folded and clamped through a first elastic positioning structure of the first positioning assembly, so that the first part and the first elastic positioning structure are coaxial;
s3, penetrating the small end of the positioning shaft into a shaft positioning structure to enable the positioning shaft to be matched with the first positioning assembly in a radial positioning mode, matching the first positioning assembly provided with the first component with the second positioning assembly provided with the turbine assembly, and enabling the first component to be pressed on the second component and enabling the end face of the annular bulge of the first component to be abutted against the end face of the third component;
s4, welding the first component and the third component;
s5, removing the first positioning assembly, the second positioning assembly and the positioning shaft.
The invention has the following beneficial effects: the first part is radially drawn in and clamped by a first elastic positioning structure of the first positioning assembly, so that the first part is coaxial with the first elastic positioning structure, the first positioning assembly is not influenced by the radial dimensional tolerance of the first part, and a clamping surface has no whole-circle gap; the large end of the positioning shaft is radially positioned and assembled by using a second positioning assembly, the small end of the positioning shaft penetrates through the turbine assembly, the turbine assembly is arranged in a cavity part of the second positioning assembly, the third component is radially drawn and clamped by a second elastic positioning structure to be coaxial with the second elastic positioning structure, the small end of the positioning shaft penetrates through the shaft positioning structure and is radially positioned and matched with the first positioning assembly, and the first elastic structure and the second elastic structure are positioned on the same axis based on the positioning shaft so as to ensure that the first component and the third component are positioned on the same axis and are not influenced by the radial dimensional tolerance of the two components; after the small end of the positioning shaft penetrates through the shaft positioning structure, a first positioning assembly clamped with a first part is matched with a second positioning assembly provided with a turbine assembly, so that the first part is pressed on the second part, the end surface of the annular bulge of the first part is abutted against the end surface of the third part to complete clamping, and welding can be started; through using this welding jig, closely cooperate with the first part, second elastic positioning structure and third part based on first elastic positioning structure to closely cooperate, and make first elastic positioning mechanism, second elastic positioning structure be located same axis and then make first part, third part be located same axis based on the location axle, not only guaranteed the axiality requirement when turbine assembly welds, further improved welding process's machining precision, effectively weaken the influence of the welding deformation of spare part.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic illustration of a prior art turbine assembly;
FIG. 2 is an exploded view of a prior art turbine assembly;
FIG. 3 is a dimensional specification schematic of a prior art turbine assembly;
FIG. 4 is a prior art welding fixture in use reference view;
FIG. 5 is a schematic view of a prior art clamping engagement of a locating clamp plate of a welding fixture with a turbine assembly;
FIG. 6 is a sectional view of a welding jig according to a preferred embodiment of the present invention in a use state;
FIG. 7 is a cross-sectional view of a first positioning assembly in accordance with a preferred embodiment of the present invention;
FIG. 8 is a side view of a first positioning assembly of the preferred embodiment of the present invention;
FIG. 9 is a sectional view of a second positioning assembly for holding the positioning shaft and placing the turbine assembly in accordance with the preferred embodiment of the present invention.
1. The clamping device comprises a first component 101, an annular bulge 2, a second component 3, a third component 4, a positioning shaft 41, a first shaft shoulder 5, a positioning piece 51, a clamping piece 511, a first step structure 512, a slope structure 52, a first pin hole 53, a threaded section 54, a shaft hole 6, a first pressing piece 61, an inner conical surface 62, a welding gap 63, a waist-shaped hole 7, a nut 71, a pressing plate 8, a base 9, an elastic clamping cylinder 91, an outer conical surface 10, a supporting cylinder 11, a connecting piece 12, a second pressing piece 13, a cylindrical pin 14, a stud and a bolt
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 6 to 9, a preferred embodiment of the present invention provides a self-positioning welding jig for a turbine assembly, wherein the turbine assembly includes at least a first member 1, a second member 2, and a third member 3, which are connected in sequence and each have a ring shape; the end face of the first component 1 is provided with an annular groove, the inner diameter of the annular groove is larger than the outer diameter of the second component 2 or the inner diameter of the annular groove is matched with the outer diameter of the second component 2, the height of the annular groove is larger than the thickness of the second component 2 or the annular groove is matched with the thickness of the second component 2, the first component 1 covers the second component 2, an annular bulge 101 of the first component 1 is abutted against the end face of the third component 3 and is to be welded, the inner annular face of the third component 3 is arranged in a protruding mode towards the direction of the first end face, and the outer diameter of the inner annular face of the third component 3 is gradually reduced towards the outer end;
this self-align welding jig includes:
the positioning device comprises a first positioning component, a positioning shaft 4 and a second positioning component;
the first positioning assembly is provided with a first elastic positioning structure, and the first elastic positioning structure is used for radially drawing in the outer ring surface of the first component 1 under the action of external force and clamping the first component 1 so as to enable the first component 1 and the first elastic positioning structure to be positioned on the same axis;
one end of the second positioning component facing the first positioning component is provided with a cavity part for accommodating the turbine component; the second positioning assembly is provided with a second elastic positioning structure, and the second elastic positioning structure is used for radially drawing in the outer ring surface of the third component 3 under the action of external force to clamp the third component 3 so as to enable the third component 3 and the second elastic positioning structure to be positioned on the same axis;
the first positioning component is provided with a shaft positioning structure matched with the positioning shaft 4 in a radial positioning mode at the axis position of the first elastic positioning structure, and the second positioning component is provided with a shaft mounting structure used for fixing the positioning shaft 4 in a radial positioning mode at the axis position of the second elastic positioning structure.
The working principle of the welding fixture is as follows: the first part 1 is clamped and drawn in radially through a first elastic positioning structure of the first positioning assembly, so that the first part 1 is coaxial with the first elastic positioning structure, the first positioning assembly is not influenced by the radial dimensional tolerance of the first part 1, and a clamping surface has no whole-circle gap; the large end of the positioning shaft 4 is radially positioned and assembled by using a second positioning assembly, the small end of the positioning shaft 4 penetrates through a turbine assembly, the turbine assembly is arranged in a cavity part of the second positioning assembly, the third component 3 is radially drawn and clamped by a second elastic positioning structure, so that the third component 3 is coaxial with the second elastic positioning structure, the small end of the positioning shaft 4 penetrates through the shaft positioning structure and is radially positioned and matched with the first positioning assembly, and the first elastic structure and the second elastic structure are positioned on the same axis based on the positioning shaft 4, so that the first component 1 and the third component 3 are positioned on the same axis and are not influenced by the radial dimensional tolerance of the two components; after the small end of the positioning shaft 4 is arranged in the shaft positioning structure in a penetrating manner, a first positioning assembly clamped with the first component 1 is matched with a second positioning assembly provided with a turbine assembly, so that the first component 1 is pressed on the second component 2, the end surface of the annular bulge 101 of the first component 1 is abutted against the end surface of the third component 3 to complete clamping, and then welding can be started; through using this welding jig, closely cooperate with first part 1 based on first elastic locating structure, second elastic locating structure closely cooperates with third part 3 to make first elastic locating mechanism, second elastic locating structure be located same axis and then make first part 1, third part 3 be located same axis based on location axle 4, not only guaranteed the axiality requirement when turbine assembly welds, further improved welding process's machining precision, effectively weaken the influence of the welding deformation of spare part.
The clamp can be further suitable for various welding parts with high coaxiality requirements and large tolerance zones of workpieces;
specifically, the first positioning component comprises a cylindrical or tubular positioning part 5, a tubular first pressing part 6 sleeved on the positioning part 5, and a driving part for driving the first pressing part 6 to move axially; the first elastic positioning structure comprises clamping pieces 51 formed on the end surface of the positioning piece 5, and the clamping pieces 51 are uniformly distributed in a ring shape along the edge of the first end surface of the positioning piece 5; the inner wall surface of the furling end of the clamping piece 51 is provided with a first step structure 511, the axial size of the first step structure 511 is matched with the thickness of the first component 1, and therefore the first component 1 can be axially limited in the clamping process, and the clamping piece is convenient to compress and fix; the inner annular surface of the first step structure 511 is used for clamping the outer annular surface of the first component 1; the clamping piece 51 is provided with an inclined plane structure 512 by protruding from the outer wall surface of the closing end, the inner wall of the end part of the first pressing piece 6 is provided with an inner conical surface 61 matched with the gradient of the inclined plane structure 512 of the clamping piece 51, and the inner conical surface is used for driving the clamping piece 51 to be radially closed when the first pressing piece 6 sleeved on the positioning piece 5 axially moves towards the direction of the large end of the inclined plane structure 512, so as to clamp the outer annular surface of the first component 1 and keep the same axis;
it should be noted that, in the present embodiment, four clamping pieces 51 are provided, and the clamping pieces 51 are preferably arc-shaped pieces, and the arc is matched with the outer annular surface of the positioning member 5; similarly, the inner annular surface of the first step formation 511 is adapted to the outer annular surface of the first component 1 and should be slightly larger than the maximum dimension of the outer annular surface thereof;
the outer wall of the first end of the first pressing piece 6 is provided with a welding window or a welding notch 62 which is positioned at the gap position of the two adjacent clamping pieces 51 and is used for a welding gun to pass through, so that the welding operation after the clamp is clamped is facilitated;
based on the technical scheme, the positioning element 5 is radially provided with the first pin hole 52, the first pressing element 6 is provided with the kidney-shaped hole 63 at a position corresponding to the first pin hole 52, and the kidney-shaped hole is used for limiting the relative rotation and the relative axial movement of the positioning element 5 and the first pressing element 6, namely the relative position of the gap between the welding window/gap and the clamping piece 51 is kept, and the interference caused by the rotation is avoided; the slotted hole 63 is provided to allow the pin inserted into the first pin hole 52 to move axially in the slotted hole 63, so that the first pressing member 6 can move axially relative to the positioning member 5 to press or release the clamping piece 51 without relative rotation.
Specifically, the driving member comprises a nut 7 in threaded connection with the free end of the positioning member 5, and a pressing plate 71 for pressing the end surface of the first pressing member 6 is formed in a radial protrusion of the nut 7, so that when the nut 7 is screwed, the first pressing member 6 is driven to axially move towards the furling end of the positioning member 5; it should be noted that, based on the setting position of the driving member, the radial dimension of the inclined plane structure 512 of the embodiment gradually increases from the free end to the closed end of the positioning member 5; it will be understood that the end of the free end of the positioning member 5 has a threaded section 53, the threaded section 53 being provided with an external thread adapted to the nut 7;
further, the shaft positioning structure comprises a stud 14, the threaded section 53 of the positioning member 5 is also provided with an internal thread matched with the stud 14 at the axial center position, and the large end of the stud 14 radially protrudes out of an annular bulge 101 similar to the pressure plate 71 so as to be pressed on the free end surface of the nut 7; the axle center position of the stud 14 is provided with an axle positioning hole for penetrating the small end of the positioning shaft 4 and matching with the outer diameter of the small end, and the positioning piece 5 and the positioning shaft 4 can be further kept at the same axle center through the stud 14, so that the positioning precision is improved.
In this embodiment, the second positioning assembly includes a base 8 and a supporting cylinder 10, the base 8 has a positioning cavity with an opening at one end; the inner diameter of the supporting cylinder 10 is matched with the outer diameter of the large end of the positioning shaft 4, the supporting cylinder 10 is used for radially limiting the positioning shaft 4 and is fixed in a positioning cavity of the base 8 through a connecting piece 11, a plurality of threaded holes are uniformly distributed and formed in the end face of the connecting end of the supporting cylinder 10 and the base, countersunk holes are correspondingly formed in the bottom of the base 8, and the connecting piece 11 is a screw and penetrates through the countersunk holes to be connected with the bottom end of the supporting cylinder 10; the second end of the support cylinder 10 is used for supporting the turbine assembly; the height of the supporting cylinder 10 is smaller than that of the base 8, so that a cavity part is formed between the end surface of the supporting cylinder 10 and the inner wall of the base 8; the elastic positioning structure comprises an elastic clamping cylinder 9 arranged in the positioning cavity and a second pressing piece 12 connected to the second end of the base 8; the inner wall of the second end of the elastic clamping cylinder 9 is used for clamping the outer annular surface of the third component 3; the outer wall surface of the second end of the elastic clamping cylinder 9 is protruded to form an outer conical surface 91, the inner wall surface of the second end of the second pressing piece 12 is protruded to form an inner conical surface 61 matched with the outer conical surface 91, and the elastic clamping cylinder 9 is driven to be radially folded when the second pressing piece 12 axially moves towards the large end direction of the inner conical surface 61, so that the elastic clamping cylinder is clamped on the outer annular surface of the third component 3 and keeps the same axis;
it should be noted that the outer wall of the second end of the base 8 is provided with an external thread, the first end of the second pressing member 12 is correspondingly provided with an internal thread to be in threaded connection with the base 8, and the second pressing member 12 can be rotated to move axially relative to the base 8, so as to drive the elastic clamping cylinder 9 to be folded radially; the side wall of the base 8 and the side wall of the elastic clamping barrel 9 are provided with second pin holes at corresponding height positions so as to insert a cylindrical pin 13 to prevent the second pressing piece 12 from driving the elastic clamping barrel 9 to rotate and driving the turbine component to rotate;
specifically, the main aspects of the positioning shaft 4 have a first shoulder 41, the shaft mounting structure includes a second step structure arranged on the inner wall of the first end of the supporting cylinder 10, the inner diameter and height of the second step structure are matched with the outer diameter and thickness of the first shoulder 41, and then the positioning shaft 4 is positioned radially and fixed in an axial limiting manner.
On the other hand, the preferred embodiment of the present invention further provides a welding method, to which the welding jig is applied, including the steps of:
s1, positioning and assembling the large end of a positioning shaft 4 at the axis position of a second elastic positioning structure by using a second positioning assembly;
s2, enabling the small end of the positioning shaft 4 to penetrate through the turbine assembly, placing the turbine assembly on a second positioning assembly, and drawing in and clamping the third component 3 through a second elastic positioning structure to enable the third component 3 to be coaxial with the second elastic positioning structure;
it can be understood that, before step S1 or S2 or S3, the first component 1 is clamped by radially drawing the first elastic locating structure of the first locating assembly so that the first component 1 is coaxial with the first elastic locating structure;
s3, the small end of the positioning shaft 4 penetrates through the shaft positioning structure, so that the positioning shaft 4 is matched with the first positioning assembly in a radial positioning mode, the first positioning assembly provided with the first component 1 is matched with the second positioning assembly provided with the turbine assembly, the first component 1 is pressed on the second component 2, and the end face of the annular protrusion 101 of the first component 1 is abutted against the second end face of the third component 3;
s4, welding the first component 1 and the third component 3;
s5, removing the first positioning assembly, the second positioning assembly and the positioning shaft 4.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (10)
1. A self-positioning welding fixture for a turbine assembly at least comprises a first part (1), a second part (2) and a third part (3) which are sequentially connected and are annular; the first terminal surface border of first part (1) is formed with annular protrusion (101), and first part (1) covers second part (2) and annular protrusion (101) of first part (1) and the second terminal surface butt of third part (3) and waits to weld, its characterized in that, from positioning welding jig includes:
the positioning device comprises a first positioning component, a positioning shaft (4) and a second positioning component;
the first positioning component is provided with a first elastic positioning structure, and the first elastic positioning structure is used for radially drawing in the outer ring surface of the first component (1) under the action of external force and clamping the first component (1) so as to enable the first component (1) and the first elastic positioning structure to be positioned on the same axis;
one end of the second positioning component facing the first positioning component is provided with a cavity part for accommodating the turbine component; the second positioning assembly is provided with a second elastic positioning structure, and the second elastic positioning structure is used for radially drawing in the outer ring surface of the third component (3) under the action of external force and clamping the third component (3) so as to enable the third component (3) and the second elastic positioning structure to be positioned on the same axis;
the first positioning assembly is provided with a shaft positioning structure matched with the positioning shaft (4) in a radial positioning mode at the axis position of the first elastic positioning structure, and the second positioning assembly is provided with a shaft mounting structure used for fixing the positioning shaft (4) in a radial positioning mode at the axis position of the second elastic positioning structure.
2. The self-positioning welding fixture for turbine assemblies according to claim 1, wherein the first positioning assembly comprises a cylindrical or cylindrical positioning member (5), and a cylindrical first pressing member (6) which is matched with the positioning member (5) and sleeved on the positioning member (5); the first elastic positioning structure comprises clamping pieces (51) formed on the end face of the positioning piece (5), and the clamping pieces (51) are uniformly distributed in a ring shape along the edge of the end face of the positioning piece (5); the inner wall surface of the closing end of the clamping piece (51) is provided with a first step structure (511), the axial size of the first step structure (511) is matched with the thickness of the first component (1), and the inner annular surface of the first step structure (511) is used for clamping the outer annular surface of the first component (1); the clamping piece (51) is formed by protruding an outer wall surface of a furling end to form an inclined plane structure (512), an inner wall of the end part of the first pressing piece (6) is formed with an inner conical surface (61) matched with the gradient of the inclined plane structure (512) of the clamping piece (51), and the inner conical surface is used for enabling the first pressing piece (6) sleeved on the positioning piece (5) to move towards the large end direction of the inclined plane structure (512) and drive the clamping piece (51) to furl radially.
3. The self-positioning welding fixture for turbine assemblies according to claim 2, wherein the outer wall of one end of the first pressing member (6) for clamping the first component (1) is provided with a welding window or a welding notch (62) for a welding gun to pass through, which is located at a gap position between two adjacent clamping sheets (51).
4. The self-positioning welding fixture for the turbine assembly according to claim 3, wherein the positioning member (5) is radially provided with a first pin hole (52), and the first pressing member (6) is provided with a kidney-shaped hole (63) at a position corresponding to the first pin hole (52) for limiting relative rotation and relative axial movement of the positioning member (5) and the first pressing member (6).
5. The self-positioning welding fixture for the turbine assembly according to claim 2, wherein the first positioning assembly further comprises a driving member for driving the first pressing member (6) to move axially, the free end of the positioning member (5) is provided with a threaded section (53), the driving member comprises a nut (7) in threaded connection with the threaded section (53) of the positioning member (5), and the nut (7) is radially and convexly provided with a pressing plate (71) for pressing the end surface of the first pressing member (6) so as to drive the first pressing member (6) to move axially towards the furled end of the positioning member (5) when the nut (7) is screwed.
6. The self-positioning welding fixture for the turbine assembly according to claim 5, wherein the shaft positioning structure comprises a stud (14), the threaded section (53) of the positioning piece (5) is further provided with an internal thread matched with the stud (14) at an axial position, and an inner end surface of a large end of the stud (14) abuts against a free end surface of the nut (7); and the axis position of the stud (14) is provided with an axis positioning hole matched with the outer diameter of the small end of the positioning shaft (4) and used for penetrating and radially positioning the small end of the positioning shaft (4).
7. The self-positioning welding fixture for turbine assemblies according to any one of claims 1 to 6, wherein the second positioning assembly comprises a pedestal (8) and a support cylinder (10), one end of the pedestal (8) having an openly disposed positioning cavity; the inner diameter of the supporting cylinder (10) is matched with the outer diameter of the large end of the positioning shaft (4), and the supporting cylinder (10) is used for radially limiting the positioning shaft (4) and is fixed in a positioning cavity of the base (8) through a connecting piece (11); the supporting cylinder (10) is used for supporting the turbine assembly; the elastic positioning structure comprises an elastic clamping cylinder (9) arranged in the positioning cavity and a second pressing piece (12) connected to the opening end of the base (8); the inner wall of the furling end of the elastic clamping cylinder (9) is used for clamping the outer ring surface of the third component (3); the outer wall surface of the furling end of the elastic clamping cylinder (9) is protruded to form an outer conical surface (91), the inner wall of the second pressing piece (12) is protruded to form an inner conical surface (61) matched with the outer conical surface (91), and the elastic clamping cylinder (9) is driven to furl radially when the second pressing piece (12) moves axially towards the large end of the inner conical surface (61).
8. The self-positioning welding jig for turbine assemblies according to claim 7, wherein the large end of the positioning shaft (4) has a first shoulder (41), and the shaft mounting structure comprises a second stepped configuration provided on the inner wall of the end of the support cylinder (10) connected to the base, the inner diameter and height of the second stepped configuration being adapted to the outer diameter and thickness of the first shoulder (41), respectively.
9. The self-positioning welding fixture for the turbine assembly according to claim 7, wherein the side wall of the base (8) and the side wall of the elastic clamping cylinder (9) are respectively provided with a second pin hole at corresponding height positions, and the second pin holes are used for inserting a cylindrical pin (13) so as to prevent the second pressing member (12) from driving the elastic clamping cylinder (9) to rotate.
10. A welding method for a turbine assembly, characterized in that a welding jig according to any one of claims 1 to 9 is applied, comprising the steps of:
s1, positioning and assembling the large end of a positioning shaft (4) on the axis position of a second elastic positioning structure by using a second positioning assembly;
s2, enabling the small end of the positioning shaft (4) to penetrate through the turbine assembly, placing the turbine assembly on a second positioning assembly, and drawing in and clamping a third part (3) through a second elastic positioning structure to enable the third part (3) to be coaxial with the second elastic positioning structure;
before the step S1 or S2 or S3, the first part (1) is radially folded and clamped through a first elastic positioning structure of the first positioning assembly, so that the first part (1) is coaxial with the first elastic positioning structure;
s3, the small end of the positioning shaft (4) penetrates through the shaft positioning structure, so that the positioning shaft (4) is matched with the first positioning assembly in a radial positioning mode, the first positioning assembly provided with the first component (1) is matched with the second positioning assembly provided with the turbine assembly, the first component (1) is pressed on the second component (2), and the end face of the annular bulge (101) of the first component (1) is abutted to the end face of the third component (3);
s4, welding the first component (1) and the third component (3);
s5, removing the first positioning assembly, the second positioning assembly and the positioning shaft (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210893126.0A CN115383378A (en) | 2022-07-27 | 2022-07-27 | Self-positioning welding fixture and welding method for turbine assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210893126.0A CN115383378A (en) | 2022-07-27 | 2022-07-27 | Self-positioning welding fixture and welding method for turbine assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116213978A (en) * | 2023-05-06 | 2023-06-06 | 深圳市鑫精诚传感技术有限公司 | Laser welding fixture and laser welding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116213978A (en) * | 2023-05-06 | 2023-06-06 | 深圳市鑫精诚传感技术有限公司 | Laser welding fixture and laser welding machine |
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