CN110756927B

CN110756927B - Swirler clamp and method for machining spiral groove based on swirler clamp

Info

Publication number: CN110756927B
Application number: CN201911109015.0A
Authority: CN
Inventors: 莫战海; 张强虎; 董少锋; 席丽娜; 张亚军; 李国峰; 许斌; 廖均
Original assignee: AECC Aviation Power Co Ltd
Current assignee: AECC Aviation Power Co Ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2021-04-06
Anticipated expiration: 2039-11-13
Also published as: CN110756927A

Abstract

The invention discloses a swirler clamp and a method for machining a spiral groove based on the swirler clamp, and belongs to the field of spiral groove manufacturing. The vortex device clamp provided by the invention integrates the clamping vortex device and the clamping vortex device, the processing angle of the spiral groove can be met by inclining a certain angle, and the through hole on the clamp can be used for indexing when the spiral groove is subjected to line cutting, so that the purpose of spiral groove indexing processing can be realized. The invention relates to a method for processing a spiral groove based on a swirler clamp, which is a method for quickly and accurately processing the spiral groove.

Description

Swirler clamp and method for machining spiral groove based on swirler clamp

Technical Field

The invention belongs to the field of spiral groove manufacturing, and relates to a swirler clamp and a spiral groove machining method based on the swirler clamp.

Background

The swirler with the spiral groove with the composite angle is used as one of main components in the nozzle, has the main function of enabling fuel to have radial components after passing through the spiral groove on the swirler, and promotes fuel atomization, and is structurally shown in figure 1, the swirler with the spiral groove is provided with N uniformly distributed spiral grooves, the groove bottom is of a curved surface structure, after the spiral groove is unfolded, a certain angle alpha exists between a swirl fan blade of the spiral groove and the vertical direction, and the left side of the swirler is provided with a positioning hole which is mainly used for dividing an oil path into two parts which respectively flow out of the spiral groove and an inner cavity, namely.

The processing difficulty of the swirler lies in the processing of the spiral groove, because the groove bottom of the spiral groove is arc-shaped and an included angle exists between the spiral groove and the vertical direction, the common method is to adopt a ball-end milling cutter to carry out milling processing, although the appearance of the spiral groove can be processed, the arc is formed at the junction of the spiral groove wall and the bottom surface, the final requirement is not met, cutter marks in the groove are distributed, the surface quality is poor, the flow loss is increased, and the processing efficiency is low.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a swirler clamp and a method for machining a spiral groove based on the swirler clamp.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:

a swirler clamp comprises a clamp body and a positioning pin;

one end of the clamp body is axially provided with a groove, and the inner diameter of the groove is equal to the outer diameter of the swirler to be clamped; a plurality of through holes are uniformly distributed on the peripheral wall of the groove, the diameter of each through hole is equal to that of a positioning hole in the vortex device to be clamped, and the number of the through holes is equal to that of the vortex fan blades of the spiral groove;

the diameter of the positioning pin is equal to that of a positioning hole in the swirler to be clamped.

Further, the clamp body is hollow cylindrical.

The method for machining the spiral groove by the swirler clamp comprises the following steps:

1) clamping the vortex device into a whole by using a clamp, wherein the vortex device as a whole is arranged at an angle alpha to the vertical line; wherein alpha is an angle formed by the swirl fan blade and a vertical line after the spiral groove is unfolded;

2) roughly machining according to the cross section shape of the spiral groove until the cutting depth reaches the highest point of the bottom curved surface of the spiral groove;

3) performing fine machining on the roughly machined spiral groove by using an electrode until the highest point of the bottom curved surface of the spiral groove coincides with the lowest point of the arc surface of the electrode; the radius of the arc surface of the electrode is R, the R is equal to the radius of the outer diameter of the swirler to be clamped, the diameter of the cylindrical section of the electrode is the same as the length of a diagonal line of a rectangle formed by adjacent swirl fan blades after the spiral groove is unfolded, and the width of the head of the electrode is the same as the width of the bottom of the spiral groove; (ii) a

4) And repeating the steps 1) to 3) until the spiral groove is processed.

Further, the specific process of the step 1) is as follows:

placing a swirler in a groove on a fixture;

aligning a positioning hole of the swirler with a through hole of the clamp;

and inserting a positioning pin into the aligned positioning hole and the through hole.

Further, the rough machining mode in the step 2) is wire cutting.

Further, the rough machining mode in the step 2) is formed electrode machining.

Further, the rough machining mode in the step 2) is to adopt an end mill for mechanical machining.

Further, in the step 3), the electrode is cylindrical, and the bottom surface of the cylinder is a processing surface.

Further, the grooves on the electrodes are made by wire cutting.

Further, the specific process of step 4) is as follows:

pulling out the positioning pin, and rotating the swirler by 360/N degrees; wherein N is the number of the spiral flow fan blades on the spiral groove;

inserting a positioning pin into the aligned positioning hole and the through hole;

and repeating the steps 2) -3) until the spiral groove is machined.

Compared with the prior art, the invention has the following beneficial effects:

the vortex device clamp provided by the invention has the advantages that the vortex device and the clamping vortex device are integrated, the processing angle of the spiral groove can be met by inclining a certain angle, and the through hole on the clamp can be divided when the spiral groove is subjected to linear cutting, so that the purpose of dividing and processing the spiral groove can be realized; furthermore, the design of the hollow structure reduces the size of the clamp and is convenient to transport.

The invention relates to a method for processing a spiral groove based on a swirler clamp, which is a method for quickly and accurately processing the spiral groove, wherein the existing mechanical processing modes such as wire cutting, milling and the like are utilized during rough processing, and an electrode with a cambered surface is utilized for processing during fine processing, so that a series of problems caused by the fact that a cutter for narrowing the spiral groove is limited in use along with the deepening of rough processing are solved; further, when the rough machining mode is wire cutting, only the vortex device needs to be rotated, the positioning hole in the vortex device can be coincided with the next through hole to be positioned, a plurality of vortex fan blades can be machined, the clamp is fixed in the process, and the problem that wire cutting wires are in the vertical direction during wire cutting is solved.

Drawings

Fig. 1 is a schematic structural view of a swirler, in which 1(a) is a front view, 1(b) is a left view, 1(c) is a top view of a positioning hole, and 1(d) is an expanded view of a spiral groove;

FIG. 2 is a schematic view of the structure of the jig, wherein 2(a) is a front view and 2(b) is a view along the direction C-C;

FIG. 3 is an assembly view of the clamp with the swirler;

fig. 4 is a schematic diagram of the electrode structure, in which 4(a) is a front view and 4(b) is a view rotated by an angle α.

Wherein: 1-a swirler; 101-a positioning hole; 102-a swirler body; 103-helical groove; 104-swirl fan blades; 2-clamping; 201-a clamp body; 202-grooves; 203-a via hole; 204-positioning pin.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention is described in further detail below with reference to the accompanying drawings:

referring to fig. 1, fig. 1 is a schematic structural diagram of a swirler, wherein 1(a) is a front view, 1(b) is a left view, 1(c) is a top view of a positioning hole, and 1(d) is an expanded view of a spiral groove; the vortex device comprises a vortex device body 102, wherein a spiral groove 103 is formed in the circumferential direction of the vortex device body 102, the spiral groove 103 is composed of uniformly distributed vortex fan blades 104, the bottom of the spiral groove 103 is of an arc structure, after the spiral groove 103 is unfolded, an included angle alpha between each vortex fan blade 104 and the vertical direction is formed, and a positioning hole 101 is further formed in the vortex device body 102 and is mainly used for dividing an oil path into two parts which respectively flow out of the spiral groove 103 and an inner cavity, namely, a double oil path.

Referring to fig. 2, fig. 2 is a schematic view of the structure of the clamp, wherein 2(a) is a front view, and 2(b) is a view along direction C-C; the clamp body 201 is in a hollow cylindrical shape, one end of the clamp body is provided with an axial groove 202, and the groove 202 is used for fixing a swirler; a circle of through holes 203 are processed on the groove 202, the number of the through holes 203 is consistent with that of the swirl fan blades 104 of the spiral groove 103 and the through holes 203 are evenly distributed along the circumference, and the diameter of each through hole 203 is the same as that of the positioning hole 101.

Referring to FIG. 3, FIG. 3 is an assembly view of the fixture and swirler; the swirler 1 extends into the groove 202, the positioning hole 101 of the swirler 1 is aligned with the through hole 203 of the clamp 2, the positioning hole and the through hole are connected into a whole through the positioning pin 204, and the whole is arranged at an angle alpha with the vertical direction. Performing rough machining according to the cross section shape of the spiral groove 103 by adopting linear cutting, removing most of machining allowance, wherein the cutting depth is the highest point of the bottom curved surface of the spiral groove 103; when the next swirl fan blade of the spiral groove 103 is processed, the positioning pin 204 in the through hole 203 is pulled out, after the part rotates by 360/N degrees, the positioning pin 204 is inserted into the adjacent through hole 203, and so on, and the rough processing of the whole spiral groove 103 is completed.

Referring to fig. 4, fig. 4 is a schematic diagram of an electrode structure; after the spiral groove 103 is unfolded, calculating a dimension E1, wherein E1 is the length of a rectangular diagonal line formed by adjacent swirl fan blades 104 after the spiral groove 103 is unfolded, the diameter of a processed cylinder is phi E1, an electrode head with the width of F1 is processed on a cylindrical electrode by adopting linear cutting according to the groove bottom width F1 of the spiral groove 103, as shown in fig. 4(a), then after the electrode rotates around the axis of the electrode, as shown in fig. 4(b), an arc is cut by adopting the linear cutting, the radius of the arc is R, and the R is equal to the radius of a swirler to be clamped, and then an electric spark is adopted to process an arc surface at the bottom opening of the spiral groove by using the processed electrode, so that the final dimension processing of the spiral groove.

Examples

Taking a spiral groove of a swirler with a composite angle spiral groove as an example, the spiral groove is accurately processed through the steps, and the specific implementation mode is as follows:

(1) processing a clamp: the length L is 50mm, the diameter of the outer circle phi 16, the diameter of the inner hole phi B is phi 10.6, 10 small holes are evenly processed on the inner hole phi B, and the hole diameter phi C is phi 2;

(2) after the swirler is inserted into an inner hole of a clamp phi 10.6, the inner hole is fixed by a positioning pin, the inner hole is adjusted by 35 degrees together according to the graph shown in figure 3, rough machining is carried out by linear cutting, and the highest point of the bottom curved surface of the spiral groove in the machining depth is determined to be 5.35;

(3) according to the calculated size E1, processing a cylindrical electrode with the diameter phi E1, linearly cutting the electrode head to 4.5 according to the width F1 of the bottom of the spiral groove, rotating the electrode by 35 degrees, and then processing an arc phi 10.6 in the center of the cylindrical electrode by linear cutting;

(4) and the manufactured electrode slowly enters along the spiral groove, and the residual machining allowance at the inlet and the outlet is removed. And (4) after the part is taken down and rotated by 36 degrees, repeating the steps.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A method for processing a spiral groove by a swirler clamp comprises a clamp body and a positioning pin; a groove (202) is axially formed in one end of the clamp body (201), and the inner diameter of the groove (202) is equal to the outer diameter of the swirler to be clamped; a plurality of through holes (203) are uniformly distributed on the peripheral wall of the groove (202), the diameter of each through hole is equal to that of a positioning hole (101) on the swirler to be clamped, and the number of the through holes (203) is equal to that of the swirl fan sheets (104) of the spiral groove (103); the diameter of the positioning pin (204) is equal to that of a positioning hole (101) on the swirler to be clamped, and the method is characterized by comprising the following steps:

1) the swirler (1) is clamped into a whole by a clamp (2) and is arranged at an angle alpha with a vertical line as a whole; wherein alpha is an angle formed by the swirl fan blade (104) and a vertical line after the spiral groove (103) is unfolded;

2) rough machining is carried out according to the cross section shape of the spiral groove (103) until the cutting depth reaches the highest point of the bottom curved surface of the spiral groove (103);

3) finely processing the roughly processed spiral groove (103) by using an electrode until the highest point of the bottom curved surface of the spiral groove (103) coincides with the lowest point of the arc surface of the electrode; the radius of the arc surface of the electrode is R, the R is equal to the radius of the groove (202), the diameter of the cylindrical section of the electrode is equal to the length of a diagonal line of a rectangle formed by adjacent swirl fan blades after the spiral groove is unfolded, and the width of the head of the electrode is equal to the width of the bottom of the spiral groove;

4) and repeating the steps 1) -3) until the spiral groove (103) is processed.

2. A method for machining a spiral groove according to claim 1, wherein the step 1) comprises the following specific steps:

placing the swirler (1) in a groove (202) on the fixture (2);

aligning a positioning hole (101) of the swirler (1) with a through hole (203) of the clamp (2);

and inserting a positioning pin (204) into the aligned positioning hole (101) and the through hole (203).

3. A method of machining a spiral groove according to claim 1 wherein the manner of roughing in step 2) is wire cutting.

4. A method of machining a spiral groove according to claim 1, wherein the manner of rough machining in step 2) is profiled electrode machining.

5. A method of machining a spiral groove as claimed in claim 1, wherein the rough machining in step 2) is performed by machining with an end mill.

6. A method for forming a spiral groove according to claim 1, wherein the electrode in step 3) has a cylindrical shape and the circular arc surface of the cylindrical head is a forming surface.

7. A method of forming a helical flute according to claim 6 wherein the flute in the electrode is formed by wire cutting.

8. A method for machining a spiral groove according to claim 1, wherein the specific process of step 4) is:

pulling out the positioning pin (204), and rotating the swirler (1) by an angle of (360/N) °; wherein N is the number of the rotating fan blades (104) on the spiral groove (103);

inserting a positioning pin (204) into the aligned positioning hole (101) and the through hole (203);

and repeating the steps 2) -3) until the spiral groove (103) is processed.