Positioning device and method for machining riveting holes of partition plate assembly

Abstract

The invention relates to an aero-engine manufacturing technology, in particular to a positioning device for machining a riveting hole of a partition plate assembly and a machining method. The positioning device comprises a bottom plate and a plurality of positioning blocks annularly and uniformly distributed on the top surface of the bottom plate; a plurality of containing grooves used for containing the arch-shaped frames are formed in the molded surface of the inner side of each positioning block. A supporting table is arranged at the bottom of the inner side molded surface of the positioning block and used for supporting the arch-shaped frame and the circular ring piece. A riveting guide hole is formed in the positioning block; an expansion block is installed on the top face of the bottom plate in a sliding mode and used for expanding the circular ring piece. Driving mechanisms are arranged on the top face of the bottom plate, and each expansion block is correspondingly provided with one driving mechanism used for driving the expansion block to slide in the radial direction. By the adoption of the positioning device, all single pieces in the partition plate assembly can be rapidly clamped, and riveting holes can be machined by guiding the drill bit through the riveting guide holes in the positioning block. Riveting process holes do not need to be machined in single pieces, the single piece machining efficiency is improved, and the single piece manufacturing cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine manufacturing, and in particular to a positioning device and a processing method for processing riveting holes of a partition assembly. Background Art

[0002] Combination Figure 1 , Figure 2 As shown in the figure, the partition assembly is an important component in the combustion chamber of an aircraft engine. It plays a role in heat insulation in the combustion chamber to prevent parts from being ablated. The partition assembly is made of a high-temperature alloy sheet metal circular ring and 28 high-temperature alloy sheet metal bow frames. The diameter of the circular ring is φ854.4mm, the height is 50mm, and the material thickness is 1mm; the width of the bow frame is 50mm, the height is 40mm, and the material thickness is 1mm. The combination of the circular ring and the bow frame is riveted. There are 8 rivet holes on each bow frame, so the number of rivet holes to be processed for each partition assembly is 224. The quality of riveting depends largely on the quality of hole making, that is, the dimensional accuracy, position, roundness, angular position, etc. of the riveted holes.

[0003] The preliminary processing method of the partition assembly is to first process the process holes on the circular ring and the bow frame respectively, leaving a margin for the process holes, and then drill and expand the holes to process the rivet holes in place before riveting. During the riveting process, the angle and position of the rivet holes on the sheet metal circular ring should be consistent with the angle and position of the rivet holes on the arc of the sheet metal bow frame. However, since the process holes of the circular ring and the bow frame are only visually matched during drilling and expansion, it is difficult to ensure the consistency of the dimensional accuracy, roundness, angle, and position of the riveted holes. At the same time, since the circular ring is large in size and thin in wall thickness, processing according to this method will cause deformation of its profile, further reducing the quality of hole making. If the sheet metal circular ring and the sheet metal bow frame are not fixed properly during processing and position shifts, the processing position needs to be reconfirmed, which will increase the processing time and extend the delivery cycle of the partition assembly. Summary of the invention

[0004] The main purpose of the present invention is to provide a positioning device and a processing method for processing riveting holes of a partition assembly, aiming to solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a positioning device for processing riveting holes of partition assemblies, comprising a base plate and a plurality of positioning blocks evenly distributed in an annular shape on the top surface of the base plate; a plurality of accommodating grooves for accommodating bow frames are arranged on the inner surface of each positioning block; a support platform is arranged at the bottom of the inner surface of the positioning block for supporting the bow frame and the circular ring member; a riveting guide hole is arranged on the positioning block; an expansion block is slidably installed on the top surface of the base plate for expanding the circular ring member, and each positioning block corresponds to an expansion block; a driving mechanism is arranged on the top surface of the base plate, and each expansion block corresponds to a driving mechanism for driving the expansion block to slide radially.

[0006] Preferably, the expansion block comprises an arc-shaped block and a rectangular slide rod integrally formed on the arc-shaped block; an empty slot is provided on the outer surface of the arc-shaped block, and the position of the empty slot corresponds to the position of the riveting guide hole.

[0007] Preferably, a plurality of guide plates are evenly distributed in an annular pattern on the top surface of the bottom plate; a U-shaped slide groove is provided on the guide plate; and the rectangular slide rod is slidably inserted in the U-shaped slide groove.

[0008] Preferably, the driving mechanism includes a support and a screw screwed on the support; the support is fixedly mounted on the base plate; a slot is provided at the end of the rectangular slide rod; the outer end of the screw is clamped in the slot; and a handle rod is provided at the inner end of the screw.

[0009] Preferably, when the expansion block moves radially outward and expands the annular member, a latch is inserted into the guide plate and the rectangular slide rod, and an anti-slip knurling is provided on the outer peripheral surface of the gripping section of the latch.

[0010] Preferably, a locking hole is provided on the groove wall of the accommodating groove, and a locking screw is matched with the locking hole.

[0011] Preferably, an alignment pin is inserted into one of the positioning blocks.

[0012] Preferably, after all positioning blocks are assembled on the base plate, the support table is processed, requiring that the table surfaces of the support tables on all positioning blocks are in the same horizontal plane, with a flatness not greater than 0.02, and a parallelism not greater than 0.02 on the base plate surface.

[0013] On the other hand, the present invention also provides a method for processing riveting holes of a partition assembly, using the above-mentioned positioning device, comprising the following steps:

[0014] S1. Place a bow-shaped frame in the receiving groove of the positioning block, and the lower end of the bow-shaped frame abuts against the table surface of the support table;

[0015] S2, placing the circular ring in the positioning device, and the support platform is supported on the lower end surface of the circular ring;

[0016] S3, using a driving mechanism to drive the expansion block to move radially outward and expand the circular ring member so that the bow frame fits the outer circumferential surface of the circular ring member;

[0017] S4. Use the rivet guide hole on the positioning block to guide the drill bit to process the rivet holes on the partition assembly.

[0018] Preferably, in step S1, after the bow frame is placed in the accommodating groove, a locking screw is passed through the locking hole on the positioning block and then screwed into the threaded hole on the bow frame to lock the bow frame; in step S3, when the expansion block moves radially outward to expand the circular ring into place, a pin is inserted on the guide plate and the rectangular slide rod; in step S4, when processing the riveted holes on the partition assembly, CNC program processing or manual hole expansion can be used for processing; if CNC program processing is used, a alignment pin is inserted on one of the positioning blocks.

[0019] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0020] (1) When the rivet holes are processed by the positioning device provided by the present invention, the rivet process holes do not need to be processed for a single piece, which shortens the processing time of a single piece in the partition assembly, improves the processing efficiency of a single piece, and saves the manufacturing cost of a single piece.

[0021] (2) In the positioning device provided by the present invention, a support platform is provided at the bottom of the inner surface of the positioning block to jointly support the bow frame and the circular ring member. The surface of the support platform is used as a reference plane. When processing the riveting holes on the partition assembly, the end face references of the bow frame and the circular ring member are consistent. The expansion block is used to ensure the roundness of the circular ring member, and the distance from the riveting hole to the reference plane is always consistent. By guiding with the riveting guide hole, the angular position of the riveting holes corresponding to the bow frame and the circular ring member is always consistent, and the corresponding holes are the same in size, thereby improving the processing quality of the riveting holes, thereby improving the processing quality of the riveting of the entire assembly, and ensuring the consistency of the parts.

[0022] (3) By adopting the positioning device provided by the present invention, all the individual parts in the partition assembly can be quickly clamped, and the rivet holes can be processed by guiding the drill bit through the rivet guide holes on the positioning block.

[0023] (4) The positioning device provided by the present invention has a simple structure and is easy to clamp, which greatly reduces the processing time of parts and shortens the processing cycle of parts. If CNC equipment is used for processing, alignment pins are used for alignment, and there is no need to repeatedly align the position of the processing holes. The riveting holes can be quickly and accurately processed through CNC programs, which can realize mass production of partition components and greatly reduce labor costs.

[0024] (5) The processing method provided by the present invention can be used for the processing of riveting holes of partition assemblies. It cleverly uses the positioning device for auxiliary processing, effectively solving the problem of accurate positioning and processing of riveting holes of double-layer thin-wall riveted parts. The use of the positioning device to process riveted holes solves the problems of low early processing efficiency, slow processing cycle, and poor processing quality. It has promotional significance for other parts with similar structures and has a very wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 is a front view of the partition assembly;

[0027] Figure 2 It is a left side view of the partition assembly;

[0028] Figure 3 A front view of the positioning device provided by the present invention;

[0029] Figure 4 A top view of the positioning device provided by the present invention;

[0030] Figure 5 It is a structural schematic diagram of the bottom plate of the present invention;

[0031] Figure 6 It is a front view of the positioning block in the present invention;

[0032] Figure 7 It is a left view of the positioning block in the present invention;

[0033] Figure 8 for Figure 6 Middle AA section view;

[0034] Fig. 9 It is a top view of the structure of the expansion block in the present invention;

[0035] Fig.10 for Fig. 9 Middle BB section view;

[0036] Fig.11 It is a top view of the structure of the guide plate in the present invention;

[0037] Fig.12 for Fig.11 Middle CC section view;

[0038] Fig.13 It is a front view of the support in the present invention;

[0039] Fig.14 A top view of the support in the present invention;

[0040] Fig.15 It is a schematic diagram of the structure of the latch in the present invention;

[0041] Fig.16 for Fig.15 Middle DD section view;

[0042] Fig.17 It is a structural schematic diagram of the positive pin finding method in the present invention;

[0043] Fig.18 It is a structural schematic diagram of the locking screw in the present invention;

[0044] Fig.19 It is a schematic diagram of the assembly structure formed by the screw rod and the handle rod in the present invention.

[0045] Explanation of the accompanying drawings: 1. Base plate; 2. Expansion block; 2a. Arc block; 2b. Rectangular slide bar; 2c. Empty slot; 2d. Card slot; 2e. Second latch hole; 3. Guide plate; 3a. U-shaped slide groove; 3b. First latch hole; 4. Support; 5. Positioning block; 5a. Accommodating groove; 5b. Support table; 5c. Riveting guide hole; 5d. Locking hole; 6. Latch; 7. Alignment pin; 8. Locking screw; 9. Screw; 10. Handle bar. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, in this embodiment, the outer end refers to the end along the radial outward, and the inner end refers to the end along the radial inward; similarly, the outer side surface is the profile along the radial outward side, and the inner side surface is the side surface along the radial inward side.

[0048] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] Combine 3 to Fig.19 As shown, on the one hand, this embodiment provides a positioning device for processing riveting holes of a partition assembly, including a bottom plate 1 and a plurality of positioning blocks 5 evenly distributed in an annular shape on the top surface of the bottom plate 1; a plurality of accommodating grooves 5a for accommodating the bow frame are arranged on the inner profile of each positioning block 5; a support platform 5b is arranged at the bottom of the inner profile of the positioning block 5 for supporting the bow frame and the circular ring; a riveting guide hole 5c is arranged on the positioning block 5; an expansion block 2 is slidably mounted on the top surface of the bottom plate 1 for tightening the circular ring, and each positioning block 5 is correspondingly provided with an expansion block 2; a driving mechanism is arranged on the top surface of the bottom plate 1, and each expansion block is correspondingly provided with a driving mechanism for driving the expansion block 2 to slide along the radial direction. The riveting guide hole 5c corresponds to the position of the riveting hole on the partition assembly.

[0050] In this embodiment, the expansion block 2 includes an arc block 2a and a rectangular slide bar 2b integrally formed on the arc block 2a; an empty slot 2c is provided on the outer profile of the arc block 2a, and the position of the empty slot 2c corresponds to the position of the riveting guide hole 5c. When machining the riveting hole on the partition assembly, the empty slot 2c plays a role of giving way to the drill bit to avoid drilling into the expansion block 2.

[0051] In this embodiment, a plurality of guide plates 3 are evenly distributed in an annular pattern on the top surface of the bottom plate 1; a U-shaped slide groove 3a is provided on the guide plate 3; and the rectangular slide bar 2b is slidably inserted in the U-shaped slide groove 3a. Further, the driving mechanism includes a support 4 and a screw 9 screwed on the support 4; the support 4 is fixedly mounted on the bottom plate 1; a slot 2d is provided at the end of the rectangular slide bar 2b; the outer end of the screw 9 is clamped in the slot 2d; and a handle bar 10 is provided at the inner end of the screw 9. By rotating the screw 9, the expansion block 2 can be driven to slide along the radial direction.

[0052] When the expansion block 2 moves radially outward and expands the circular ring, a pin 6 is inserted on the guide plate 3 and the rectangular slide bar 2b. Specifically, a first pin hole 3b is provided on the guide plate 3, and a second pin hole 2e is provided on the rectangular slide bar 2b. When the expansion block 2 moves radially outward to expand the circular ring, the first pin hole 3b is aligned with the second pin hole 2e. At this time, the pin 6 can be inserted from the first pin hole 3b and inserted downward into the second pin hole 2e, which plays a role in limiting the radial movement of the expansion block 2 and preventing it from loosening during the drilling process. Furthermore, an anti-skid knurling is provided on the outer peripheral surface of the grip section of the pin 6 to play an anti-skid role, making it convenient for workers to hold the pin 6 for plugging and unplugging operations.

[0053] Combination Figure 4 , Figure 6 As shown, a locking hole 5d is provided on the groove wall of the accommodating groove 5a, and a locking screw 8 is matched with the locking hole 5d.

[0054] In this embodiment, a aligning pin 7 is inserted into one of the positioning blocks 5. The aligning pin 7 is provided for the purpose of facilitating alignment when machining using a numerical control program.

[0055] In this embodiment, after all the positioning blocks 5 are assembled on the base plate 1, the support table 5b is processed, requiring that the table surfaces of the support tables 5b on all the positioning blocks 5 are in the same horizontal plane, and the flatness is not greater than 0.02, and the parallelism of the surface of the base plate 1 is not greater than 0.02.

[0056] In this example, the number of the positioning blocks 5 is seven, and correspondingly, the number of the expansion blocks 2 is also seven.

[0057] On the other hand, this embodiment also provides a method for processing riveting holes of a partition assembly, using the above-mentioned positioning device, comprising the following steps:

[0058] S1. Place a bow-shaped frame in the receiving groove 5a of the positioning block 5, and the lower end of the bow-shaped frame abuts against the surface of the support platform 5b;

[0059] S2, placing the circular ring in the positioning device, and the support platform 5b is supported on the lower end surface of the circular ring;

[0060] S3, using the driving mechanism to drive the expansion block 2 to move radially outward and expand the circular ring member so that the bow frame fits the outer circumference of the circular ring member;

[0061] S4. Use the riveting guide hole 5c on the positioning block 5 to guide the drill bit to machine the riveting hole on the partition assembly.

[0062] Furthermore, in step S1, after the bow frame is placed in the receiving groove 5a, the locking screw 8 is passed through the locking hole 5d on the positioning block 5 and then screwed into the threaded hole on the bow frame to lock the bow frame.

[0063] In step S3, when the expansion block 2 moves radially outward to expand the annular member into place, a latch 6 is inserted into the guide plate 3 and the rectangular slide bar 2b.

[0064] In step S4, when processing the riveting holes on the partition assembly, numerical control program processing or manual hole enlarging method can be used for processing.

[0065] If a numerical control program is used for processing, a aligning pin 7 is inserted into one of the positioning blocks 5. One processing program can be reused, and batch processing of the rivet holes of the partition assembly can be achieved. Moreover, the rivet holes of each partition assembly can be processed by simply repeating steps S1 to S4. In the later processing, the aligning pin 7 can be used for alignment and positioning, and can be reused, thereby improving processing efficiency, saving manufacturing costs, ensuring the consistency of the rivet holes of each partition assembly, and improving the processing quality of the riveted parts.

[0066] When manual hole enlarging is used for processing, multiple people can process the rivet holes on the same partition assembly at the same time, thereby improving processing efficiency.

[0067] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A positioning device for processing riveting holes of a partition assembly, characterized in that: It comprises a bottom plate (1) and a plurality of positioning blocks (5) evenly distributed in an annular shape on the top surface of the bottom plate (1); A plurality of accommodating grooves (5a) for accommodating the bow-shaped frame are arranged on the inner profile of each positioning block (5); a support platform (5b) is arranged at the bottom of the inner profile of the positioning block (5) for supporting the bow-shaped frame and the circular ring; and a riveting guide hole (5c) is arranged on the positioning block (5); An expansion block (2) is slidably mounted on the top surface of the base plate (1) for expanding the annular member, and each positioning block (5) is provided with a corresponding expansion block (2); a driving mechanism is provided on the top surface of the base plate (1), and each expansion block is provided with a corresponding driving mechanism for driving the expansion block (2) to slide radially.

2. A positioning device for processing riveting holes of a partition assembly as claimed in claim 1, characterized in that: The expansion block (2) comprises an arc block (2a) and a rectangular sliding rod (2b) integrally formed on the arc block (2a); an empty slot (2c) is provided on the outer surface of the arc block (2a), and the position of the empty slot (2c) corresponds to the position of the riveting guide hole (5c).

3. A positioning device for processing riveting holes of a partition assembly as claimed in claim 2, characterized in that: A plurality of guide plates (3) are evenly distributed in an annular pattern on the top surface of the bottom plate (1); a U-shaped slide groove (3a) is provided on the guide plate (3); and the rectangular slide rod (2b) is slidably inserted in the U-shaped slide groove (3a).

4. A positioning device for processing riveting holes of a partition assembly as claimed in claim 3, characterized in that: The driving mechanism comprises a support (4) and a screw rod (9) screwed onto the support (4); the support (4) is fixedly mounted on the base plate (1); a clamping groove (2d) is provided at the end of the rectangular sliding rod (2b); the outer end of the screw rod (9) is clamped into the clamping groove (2d); and a handle rod (10) is provided at the inner end of the screw rod (9).

5. A positioning device for processing riveting holes of a partition assembly as claimed in claim 3, characterized in that: When the expansion block (2) moves radially outward and expands the annular member, a latch (6) is inserted into the guide plate (3) and the rectangular slide rod (2b), and anti-slip knurling is provided on the outer peripheral surface of the gripping section of the latch (6).

6. A positioning device for processing riveting holes of a partition assembly as claimed in claim 1, characterized in that: A locking hole (5d) is provided on the groove wall of the accommodating groove (5a), and a locking screw (8) is matched with the locking hole (5d).

7. A positioning device for processing riveting holes of a partition assembly as claimed in claim 1, characterized in that: A aligning pin (7) is inserted into one of the positioning blocks (5).

8. A positioning device for processing riveting holes of a partition assembly as claimed in claim 1, characterized in that: After all the positioning blocks (5) are assembled on the base plate (1), the support platform (5b) is processed, requiring that the surfaces of the support platforms (5b) on all the positioning blocks (5) are in the same horizontal plane, and the flatness is not greater than 0.02, and the parallelism of the surface of the base plate (1) is not greater than 0.

02.

9. A method for processing riveting holes of a partition assembly, characterized in that: The positioning device according to any one of claims 1 to 7 comprises the following steps: S1. placing a bow-shaped frame in the receiving groove (5a) of the positioning block (5), with the lower end of the bow-shaped frame resting on the surface of the supporting platform (5b); S2, placing the circular ring in the positioning device, and the support platform (5b) is supported on the lower end surface of the circular ring; S3, using a driving mechanism to drive the expansion block (2) to move radially outward and expand the circular ring member, so that the bow frame fits the outer circumference of the circular ring member; S4. Use the riveting guide hole (5c) on the positioning block (5) to guide the drill bit to machine the riveting hole on the partition assembly.

10. A method for processing riveting holes of a partition assembly as claimed in claim 9, characterized in that: In step S1, after the bow frame is placed in the receiving groove (5a), a locking screw (8) is passed through the locking hole (5d) on the positioning block (5) and then screwed into the threaded hole on the bow frame to lock the bow frame; In the step S3, when the expansion block (2) moves radially outward to expand the circular ring into place, a latch (6) is inserted into the guide plate (3) and the rectangular slide bar (2b); In step S4, when processing the riveting holes on the partition assembly, numerical control program processing or manual hole enlarging method can be used for processing; if numerical control program processing is used, a aligning pin (7) is inserted into one of the positioning blocks (5).

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