CN116652022A - Working method of spinning clamp of exhaust diffuser - Google Patents

Abstract

The invention relates to a working method of a spinning fixture for an exhaust diffuser. The spinning fixture for an exhaust diffuser includes a base, a connecting ring, a support ring, a pressing plate, a spinning ring and a positioning ring, and the base includes a disk-shaped base. And the supporting cylinder, the outer diameter of the supporting cylinder is adapted to the inner diameter of the thin-walled cylinder; the connecting ring is sleeved on the supporting cylinder, and the tail end of the connecting ring is fixedly connected with the disc-shaped base of the base; the supporting The ring is sleeved on the support cylinder, and the tail end of the support ring is connected with the front end of the connecting ring through adjusting bolts; the spinning ring includes a symmetrically arranged left half ring and a right half ring, and the left half ring/right half ring includes integrally formed The spinning ring support part and step part of the spinning ring, the length of the step part in the axial direction matches the length of the flange welding part, and the junction of the front end surface of the ring step part and the inner ring is provided with an inversion matching the shape of the bending part. Corner; the positioning ring is sleeved on the outer ring formed by the spinning support parts of the left half ring and the right half ring.

Description

A working method of spinning fixture for exhaust diffuser

technical field

The invention relates to the technical field of aero-engine parts processing, in particular to a spinning fixture for an exhaust diffuser and a working method thereof.

Background technique

A certain type of exhaust diffuser is made of sheet metal with a thickness of 0.6 ~ 1mm, which is drawn and expanded, and then combined and welded. Since all are thin plate parts, welding deformation is difficult to control. During the trial production process, many problems were encountered, among which the spinning forming of parts is a difficult point. Therefore, the requirements for the tooling are very high, and the tooling is required to have sufficient support. As shown in Figures 1 and 2, the part is composed of a thin-walled cylinder 1 and a flange 2; There is a transition portion 22 with a gap between them and a folded portion 21 arranged vertically outward along the transition portion. During processing, the front end of the thin-walled cylinder 1 is welded and fixed with the welded portion 23, and then the thin-walled cylinder 1 and the welded portion The front end of 23 is turned outwards to form a curved portion 24 with a certain bending radius; the curved portion 24 is outwardly spun, and the diameter of the tail end of the thin-walled cylinder 1 is larger than the diameter of the spinning place. If an integral support block is used, It will directly cause the part to be unable to be disassembled from the fixture. To sum up, the fixture must adopt a block structure to meet the disassembly of parts after spinning. However, the supporting ring is only fixed by screws after being divided into blocks, and the supporting force generated cannot meet the requirements of part spinning.

Contents of the invention

The technical problem to be solved by the present invention is to provide a simple-structured and easy-to-assemble exhaust diffuser spinning fixture and its working method.

In order to solve the above technical problems, the exhaust diffuser spinning fixture provided by the present invention includes a base, a connecting ring, a support ring, a pressure plate, a spinning ring and a positioning ring, and the base includes a disc-shaped base and a support cylinder, The tail end of the support cylinder is fixedly connected with the end surface of the disc-shaped base, and the outer diameter of the support cylinder is adapted to the inner diameter of the thin-walled cylinder; the connecting ring is sleeved on the support cylinder , the tail end of the connecting ring is fixedly connected with the disc-shaped base of the base, and there is a gap between the inner wall of the connecting ring and the outer wall of the supporting cylinder; the supporting ring is sleeved on the supporting cylinder, and the supporting The tail end of the ring is connected with the front end of the connecting ring via adjusting bolts, there is a gap between the inner wall of the supporting ring and the outer wall of the supporting cylinder, and the outer diameter of the supporting ring is set smaller than the outer diameter of the connecting ring; the pressing plate One end of the connecting ring is connected to the front end of the connecting ring through bolts, and the other end of the pressure plate is crimped with the front end of the supporting ring; the spinning ring includes a symmetrically arranged left half ring and a right half ring, and the left half ring /The right half ring includes an integrally formed spinning ring support part and a step part, the length of the step part in the axial direction is adapted to the length of the flange welding part, and the left half ring and the right half ring form a spinning ring Finally, the inner ring formed by the step of the left half ring and the right half ring fits in a gap with the outer wall of the support cylinder, and the junction between the front end surface of the ring step and the inner ring is set to match the shape of the curved part The chamfered part; the positioning ring is sleeved on the outer ring composed of the spinning support parts of the left half ring and the right half ring, and is used to fix and support the spinning ring.

Further, the axial length of the abutment cylinder is adapted to the axial depth of the thin-walled cylinder, so that when the thin-walled cylinder is sleeved outside the abutment cylinder, the thin-walled cylinder The front end and the welding part are placed on the front end edge of the supporting cylinder, which is convenient for turning the thin-walled cylinder body and the front end of the welding part outwards for spinning.

Further, the exhaust diffuser spinning fixture also includes a plurality of spacers, the spacers are placed between the connecting ring and the spinning ring, and are used to support and limit the position of the spinning ring to avoid spinning During the pressing process, the spinning ring is squeezed and displaced, which affects the processing dimensional accuracy.

Further, the left half ring and the right half ring are obtained by dividing the same ring body into two halves evenly by wire cutting, so that the obtained left half ring and right half ring are closely connected without faults, avoiding parts spinning. The problem of local depression; after the spinning is completed, the spinning ring that is divided into two halves is separated first, and then the parts can be smoothly disassembled from the fixture, which is easy to disassemble.

Further, the outer wall of the front end of the support cylinder is provided with a detachable inlay ring along the circumferential direction. After the thin-walled cylinder is inserted into the support cylinder, only the inlay ring contacts the inner wall of the thin-wall cylinder, so that the exhaust gas is diffused. After the spinning jig is used for many times, the size deviation is caused by wear and tear. Only the inlay ring needs to be replaced, which avoids replacing the entire base and saves costs.

Further, the supporting cylinder and the disc-shaped base are hollow, so as to reduce the overall weight of the fixture and reduce the manufacturing cost.

The working method of the above exhaust diffuser spinning fixture includes the following steps:

A. First, put the welded thin-walled cylinder and the flange into the supporting cylinder of the base, so that the tail end of the thin-walled cylinder is supported by the disc-shaped base, and the front end of the thin-walled cylinder and the flanged The welding part is placed on the front edge of the support cylinder.

B. Put the connecting ring on the outside of the thin-walled cylinder and fix the tail end of the connecting ring with the disc-shaped base of the base, so that the thin-walled cylinder is placed in the gap between the connecting ring and the supporting cylinder.

C. Put the supporting ring on the thin-walled cylinder body and connect the supporting ring with the connecting ring through the adjusting bolts, so that the folded part of the flange is set close to the front end of the supporting ring, at 0°, 90°, 180° of the connecting ring ° and 270 ° places are provided with pressing plates, one end of each pressing plate is fixedly connected with the connecting ring, and the opposite end compresses the folded portion of the flange on the front end surface of the supporting ring.

D. Clamp the left half ring and the right half ring on the front end of the thin-walled cylinder to form a spinning ring, so that the inner ring composed of the left half ring and the right half ring step is welded to the front end of the thin-walled cylinder and the flanging The fixed part is limited and fixed, and the area to be spun is placed on the chamfer of the spinning ring; pads are set at 45°, 135°, 225°, and 315° of the connecting ring to limit the spinning ring and the connecting ring The axial distance between them is used to limit the spinning ring; the positioning ring is sleeved on the outer ring of the spinning ring, and the positioning ring, spinning ring, spacer and the front end of the connecting ring are fixed by bolts Connected to complete the clamping of the exhaust diffuser spinning fixture and parts.

E. Cooperate the clamped exhaust diffuser spinning fixture with the power system transmission, so that the exhaust diffuser spinning fixture and parts keep rotating, insert the spinning wheel for spinning into the positioning ring, so that The rotary wheel spins the front end of the thin-walled cylinder and the flange along the chamfering to obtain parts with curved parts.

The technical effect of the invention: (1) Compared with the prior art, the spinning fixture of the exhaust diffuser of the present invention adopts a block design, which is easy to assemble and disassemble; (2) The connection between the connecting ring and the spinning ring Spacers are set between them to prevent the spinning ring from shifting during the spinning process and affect the machining accuracy; (3) The left half ring and the right half ring are obtained by dividing the same ring body into two halves evenly by wire cutting, so that the left half ring and the right half ring After the ring is assembled, the gap is small, there will be no faults, and the problem of local depression during part spinning can be avoided; (4) The setting of the inlaid ring can reduce the processing cost and prolong the overall service life of the fixture.

Description of drawings

Below in conjunction with accompanying drawing, the present invention will be described in further detail:

Fig. 1 is the cross-sectional structure schematic diagram of the exhaust diffuser thin-walled cylinder body and flange welding of the present invention;

Fig. 2 is a partial enlarged view of area A in Fig. 1;

Fig. 3 is the front view of the exhaust diffuser spinning fixture and the parts clamped in the present invention;

Fig. 4 is a sectional view along A-A direction in Fig. 3;

Fig. 5 is a partial enlarged view of area B in Fig. 4;

Fig. 6 is a schematic cross-sectional structure diagram of the base of the present invention;

Fig. 7 is a structural schematic diagram of the left half ring of the present invention;

FIG. 8 is a partially enlarged view of area C in FIG. 7 .

In the figure: thin-walled cylinder 1, flange 2, folded part 21, transition part 22, welded part 23, curved part 24, base 3, supporting cylinder 31, disc-shaped base 32, inlay ring 33, connecting ring 4. Support ring 5, adjusting bolt 51, pressure plate 6, spinning ring 7, stepped part 71, spinning ring supporting part 72, chamfering part 73, pad 8, positioning ring 9.

Detailed ways

Example 1

As shown in Figures 3 to 6, the exhaust diffuser spinning fixture of this embodiment includes a base 3, a connecting ring 4, a support ring 5, a pressing plate 6, a spinning ring 7 and a positioning ring 9, and the base 3 includes a disc Shaped base 32 and support cylinder 31, the tail end of this support cylinder 31 is fixedly connected with the end surface of disc-shaped base 32, the outer diameter of this support cylinder 31 is adapted to the inner diameter of thin-walled cylinder 1, and the support The axial length of the support cylinder 31 is adapted to the axial depth of the thin-wall cylinder 1, so that when the thin-wall cylinder 1 is sleeved outside the support cylinder 31, the front end of the thin-wall cylinder 1 and the welding part 23 are positioned On the front end edge of the support cylinder 31, the front end outer wall of the support cylinder 31 is provided with an inlay ring 33 which is threadedly connected with the support cylinder 31 in the circumferential direction. After the thin-walled cylinder 1 is inserted into the support cylinder 31, only the inlay ring 33 and The inner walls of the thin-walled cylindrical body 1 are in contact; the supporting cylinder 31 and the disc-shaped base 32 are hollow, so as to reduce the overall weight of the fixture.

When the connecting ring 4 is sleeved on the supporting cylinder 31, the tail end of the connecting ring 4 is fixedly connected with the disc-shaped base 32 of the base 3 through two symmetrically arranged bolts, and the inner wall of the connecting ring 4 is connected to the supporting cylinder 31. There is a gap between the outer walls; the supporting ring 5 is sleeved on the supporting cylinder 31, and the tail end of the supporting ring 5 is connected with the front end of the connecting ring 4 through two symmetrically arranged adjusting bolts 51, so that the adjustment bolts can pass through 51 to adjust, the position of the support ring 5 can be changed; there is a gap between the inner wall of the support ring 5 and the outer wall of the supporting cylinder 31, and the outer diameter of the support ring 5 is set smaller than the outer diameter of the connecting ring 4, so that Pressing plate 6 and spacer 8 can be arranged on the edge outside of supporting ring 5; Pressing plate 6 is arranged on 0 °, 90 °, 180 °, 270 ° of connecting ring 4, and one end of each pressing plate 4 is fixedly connected with connecting ring 4 through bolts, The opposite end presses the folded portion 21 of the flange 2 against the front end of the support ring 5 .

The spinning ring 7 includes a symmetrically arranged left half ring and a right half ring. The left half ring and the right half ring are obtained by dividing the same ring body into two halves evenly through wire cutting, so that the obtained left half ring and right half ring are connected. tight, no faults will occur; as shown in Figure 7 and Figure 8, the left half ring/right half ring both include an integrally formed spinning ring support part 72 and a step part 71, and the length of the step part 71 along the axial direction is the same as that of the flange The length of the welding part 23 is adapted, and after the left half ring and the right half ring form the spinning ring 7, the inner ring formed by the step part 71 of the left half ring and the right half ring matches with the outer wall of the supporting cylinder 31, and the annular A chamfer 73 matching the shape of the curved portion 24 is provided at the junction of the front end surface of the stepped portion 71 and the inner ring, for processing the curved portion 24; pads 8 are arranged at 45°, 135°, 225° of the connecting ring 4 °, 315°, to limit the axial distance between the spinning ring 7 and the connecting ring 4; the positioning ring 9 is sleeved on the outer ring formed by the spinning support part 72 of the left half ring and the right half ring, and Fix and connect the positioning ring 9, the spinning ring 7, the spacer 8 and the front end face of the connecting ring 4 by bolts to complete the clamping.

Example 2

The working method of the above exhaust diffuser spinning fixture specifically includes the following steps:

A. First put the welded thin-walled cylinder 1 and flange 2 into the supporting cylinder 31 of the base 3, so that the tail end of the thin-walled cylinder 1 is supported by the disc-shaped base 32, and the thin-walled cylinder 1 The welding part 23 of the front end and the flange 2 is placed on the front edge of the support cylinder 31 .

B. Set the connecting ring 4 outside the thin-walled cylinder 1 and fix the tail end of the connecting ring 4 with the disc-shaped base 32 of the base 3, so that the thin-walled cylinder 1 is placed on the connecting ring 4 and the supporting cylinder 31 in the gap between.

C. Set the support ring 5 outside the thin-walled cylinder 1 and connect the support ring 5 with the connecting ring 4 through the adjusting bolt 51, so that the folded part 21 of the flange 2 is set close to the front end of the support ring 5, and the connection 0°, 90°, 180°, and 270° of the ring 4 are provided with pressure plates 6, one end of each pressure plate 6 is fixedly connected with the connecting ring 4 through bolts, and the opposite end presses the folded portion 21 of the flange 2 on the support ring 5 on the front end face.

D. Clamp the left half ring and the right half ring on the front end of the thin-walled cylinder 1 to form the spinning ring 7, so that the inner ring formed by the left half ring and the right half ring step 71 is opposite to the front end of the thin-walled cylinder 1 and The welding part 23 of the flange 2 is limited and fixed, and the area to be spun is placed on the chamfer 73 of the spinning ring 7; pads 8 are set at 45°, 135°, 225°, and 315° of the connecting ring 4 , to limit the axial distance between the spinning ring 7 and the connecting ring 4, and to limit the spinning ring 7; the positioning ring 8 is sleeved on the outer ring of the spinning ring 7, and the positioning ring is fixed by bolts 9. The spinning ring 7 and the spacer 8 are fixedly connected to the front end of the connecting ring 4 to complete the spinning fixture and parts of the exhaust diffuser.

E. Cooperate the clamped exhaust diffuser spinning fixture with the power system (such as the rotating shaft on the lathe), so that the exhaust diffuser spinning fixture and parts keep rotating, and the spinning fixture used for spinning The wheel is inserted into the positioning ring 9 so that the wheel spins the front end of the thin-walled cylinder 1 and the flange 2 along the chamfer 73 to obtain a part with a curved portion 24 .

Apparently, the above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or changes derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims (1)

1. A method of operating an exhaust diffuser spinning clamp, comprising the steps of:

A. firstly, sleeving the welded thin-wall cylinder and the flanging into a supporting cylinder of a base, so that the tail end of the thin-wall cylinder is supported by a disc-shaped base, and the front end of the thin-wall cylinder and the welding part of the flanging are arranged at the front end edge of the supporting cylinder;

B. sleeving the connecting ring outside the thin-wall cylinder body, and fixedly connecting the tail end of the connecting ring with the disc-shaped base of the base, so that the thin-wall cylinder body is arranged in a gap between the connecting ring and the supporting cylinder;

C. the method comprises the steps that a supporting ring is sleeved outside a thin-wall cylinder and connected with a connecting ring through an adjusting bolt, so that a turnup part of a turnup is tightly attached to the front end face of the supporting ring, pressing plates are arranged at 0 DEG, 90 DEG, 180 DEG and 270 DEG of the connecting ring, one end of each pressing plate is fixedly connected with the connecting ring, and the turnup part of the turnup is pressed on the front end face of the supporting ring by the opposite end;

D. the left half ring and the right half ring are clamped at the front end of the thin-wall cylinder body to form a spinning ring, so that an inner ring formed by the step parts of the left half ring and the right half ring limits and fixes the front end of the thin-wall cylinder body and the welding part of the flanging, and a region to be spun is arranged at the chamfering part of the spinning ring; setting cushion blocks at 45 degrees, 135 degrees, 225 degrees and 315 degrees of the connecting ring to limit the axial distance between the rotating ring and the connecting ring and limit the rotating ring; sleeving the positioning ring on an outer ring of the spinning ring, and fixedly connecting the positioning ring, the spinning ring, the cushion block and the front end surface of the connecting ring through bolts to finish the clamping of the spinning clamp of the exhaust diffuser and the parts;

E. and (3) driving the clamped exhaust diffuser spinning clamp to be matched with a power system, so that the exhaust diffuser spinning clamp and the part keep a rotating state, and inserting a spinning roller for spinning into the positioning ring, so that the front ends of the thin-wall cylinder body and the flanging of the spinning roller are spun along the chamfer part, and the part with the bending part is obtained.