Positioning device and method for machining riveted holes of partition assembly

Abstract

This invention relates to aero-engine manufacturing technology, and more particularly to a positioning device and processing method for machining riveting holes in bulkhead assemblies. The positioning device includes a base plate and multiple positioning blocks evenly distributed in a ring on the top surface of the base plate; multiple receiving grooves for accommodating bow-shaped frames are provided on the inner surface of each positioning block; a support platform is provided at the bottom of the inner surface of the positioning block to support the bow-shaped frame and the ring component; riveting guide holes are provided on the positioning blocks; expansion blocks are slidably mounted on the top surface of the base plate for tightening the ring component; and a driving mechanism is provided on the top surface of the base plate, with one driving mechanism corresponding to each expansion block, for driving the expansion block to slide radially. By using the positioning device provided by this invention, all individual parts in the bulkhead assembly can be quickly clamped, and the riveting holes can be machined by guiding the drill bit through the riveting guide holes on the positioning blocks. Individual parts do not require machining riveting process holes, improving the processing efficiency of individual parts and saving on the manufacturing cost of individual parts.

Description

Technical Field

[0001] This invention relates to the field of aero-engine manufacturing technology, and in particular to a positioning device and processing method for machining riveting holes in bulkhead components. Background Technology

[0002] Combination Figure 1 , Figure 2 As shown, the baffle assembly is a crucial component in the combustion chamber of an aero-engine, serving as heat insulation to prevent parts from burning out. The baffle assembly is manufactured by combining one high-temperature alloy sheet metal ring and 28 high-temperature alloy sheet metal bow-shaped frames. The ring has a diameter of φ854.4mm, a height of 50mm, and a material thickness of 1mm; the bow-shaped frames are 50mm wide, 40mm high, and 1mm thick. The ring and bow-shaped frames are joined by riveting, with each bow-shaped frame having 8 riveting holes. Therefore, each baffle assembly requires 224 riveting holes. The riveting quality largely depends on the hole quality, including the dimensional accuracy, positional accuracy, roundness, and angular position of the riveting holes.

[0003] The initial processing method for the partition assembly involves first machining process holes on the ring and the arched frame, leaving some allowance. Then, the riveting holes are machined into position using a drill bit to enlarge them before riveting. During riveting, the angular direction and position of the riveting holes on the sheet metal ring should be consistent with those on the arc of the sheet metal arched frame. However, because the alignment of the ring and arched frame's process holes relies solely on visual inspection during drilling and enlarging, the consistency of the dimensional accuracy, roundness, angular direction, and position of the riveting holes is difficult to guarantee. Furthermore, due to the large size and thin wall of the ring, this method can lead to surface deformation, further reducing the hole quality. If the sheet metal ring and arched frame are not properly secured during processing, causing positional shifts, the machining position needs to be reconfirmed, increasing processing time and extending the partition assembly's delivery cycle. Summary of the Invention

[0004] The main objective of this invention is to provide a positioning device and processing method for machining riveting holes in partition assemblies, aiming to solve the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention provides a positioning device for machining riveting holes in a partition assembly, comprising a base plate and a plurality of positioning blocks evenly distributed in a ring on the top surface of the base plate; a plurality of receiving grooves for accommodating an arc-shaped frame are provided on the inner surface of each positioning block; a support platform is provided at the bottom of the inner surface of the positioning block for supporting the arc-shaped frame and the ring component; a riveting guide hole is provided on the positioning block; an expansion block is slidably installed on the top surface of the base plate for tightening the ring component, with one expansion block corresponding to each positioning block; a driving mechanism is provided on the top surface of the base plate, with one driving mechanism corresponding to each expansion block for driving the expansion block to slide radially.

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

[0007] Preferably, multiple guide plates are evenly distributed in a ring on the top surface of the base plate; the guide plates are provided with U-shaped grooves; the rectangular slide rod is slidably inserted into the U-shaped groove.

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

[0009] Preferably, when the expansion block moves radially outward and tightens the ring, a pin is inserted into the guide plate and the rectangular slide bar, and anti-slip knurling is provided on the outer peripheral surface of the holding section of the pin.

[0010] Preferably, a locking hole is provided on the wall of the receiving groove, and a locking screw is provided in the locking hole.

[0011] Preferably, a centering pin is inserted on one of the positioning blocks.

[0012] Preferably, after all the positioning blocks are assembled on the base plate, the support platform is machined, requiring that the table surface of the support platform on all the positioning blocks be on the same horizontal plane, and the flatness is not greater than 0.02, and the parallelism of the base plate surface is not greater than 0.02.

[0013] On the other hand, the present invention also proposes a method for machining riveting holes in a partition assembly, employing the above-mentioned positioning device, comprising the following steps:

[0014] S1. Place the bow-shaped frame in the receiving slot of the positioning block, and let the lower end of the bow-shaped frame abut against the table surface of the support platform.

[0015] S2. Place the ring inside the positioning device, with the support platform resting on the lower end face of the ring.

[0016] S3. The expansion block is driven to move radially outward using the drive mechanism and tighten the ring component, so that the bow-shaped frame fits against the outer circumferential surface of the ring component;

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

[0018] Preferably, in step S1, after the bow-shaped frame is placed in the receiving groove, the locking screw is screwed into the threaded hole on the bow-shaped frame through the locking hole on the positioning block to lock the bow-shaped frame; in step S3, when the expansion block moves radially outward to expand the ring into place, a pin is inserted on the guide plate and the rectangular slide rod; in step S4, when machining the riveting hole on the partition assembly, it can be machined by CNC program or by manual hole enlargement; if CNC program is used, a centering 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 processing riveting holes using the positioning device provided by the present invention, no riveting process holes 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-shaped frame and the ring part. The platform surface of the support platform serves as the reference surface. When processing the riveting holes on the partition assembly, the end face references of the bow-shaped frame and the ring part are consistent. The roundness of the ring part is guaranteed by the expansion block. The distance from the riveting hole to the reference surface is always consistent. By using the riveting guide hole for guidance, the angular position of the riveting hole corresponding to the bow-shaped frame and the ring part is always consistent, and the size of the corresponding hole is the same. This improves the processing quality of the riveting hole, thereby improving the processing quality of the entire assembly riveting and ensuring the consistency of the parts.

[0022] (3) By using the positioning device provided by the present invention, all individual parts in the partition assembly can be quickly clamped, and the riveting hole can be processed by guiding the drill bit through the riveting guide hole 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 the parts and shortens the processing cycle. When CNC equipment is used for processing, the alignment pin is used for alignment, and there is no need to repeatedly align the position of the processing hole. The riveting hole is processed quickly and accurately through the CNC program, which can realize the mass production of partition components and greatly reduce labor costs.

[0024] (5) The processing method provided by the present invention can be used for processing the riveting holes of the partition assembly. It cleverly utilizes the positioning device for auxiliary processing, effectively solving the problem of accurate positioning and processing of riveting holes in double-layer thin-walled riveting parts. Using the positioning device to process the riveting holes solves the problems of low processing efficiency, slow processing cycle and poor processing quality in the early stage. It has promotional significance for other similar structure parts and has a very wide range of applications. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

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

[0027] Figure 2 Left view of the partition assembly;

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

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

[0030] Figure 5 This is a schematic diagram of the structure of the base plate in this invention;

[0031] Figure 6 This is the front view of the positioning block in this invention;

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

[0033] Figure 8 for Figure 6 Sectional view of AA;

[0034] Figure 9 This is a top view of the expansion block in this invention;

[0035] Figure 10 for Figure 9 BB section view;

[0036] Figure 11 This is a top view of the guide plate in this invention;

[0037] Figure 12 for Figure 11 CC section view;

[0038] Figure 13 This is a front view of the support in this invention;

[0039] Figure 14 This is a top view of the support in this invention;

[0040] Figure 15 This is a schematic diagram of the pin structure in this invention;

[0041] Figure 16 for Figure 15 DD section view;

[0042] Figure 17 This is a schematic diagram of the structure of the locating pin in this invention;

[0043] Figure 18 This is a schematic diagram of the locking screw in this invention;

[0044] Figure 19 This is a schematic diagram of the component structure formed by the screw and the handle rod in this invention.

[0045] The following are the reference numerals: 1. Base plate; 2. Expansion block; 2a. Arc-shaped block; 2b. Rectangular slide bar; 2c. Open slot; 2d. Slot; 2e. Second pin hole; 3. Guide plate; 3a. U-shaped slide groove; 3b. First pin hole; 4. Support; 5. Positioning block; 5a. Receiving groove; 5b. Support platform; 5c. Riveting guide hole; 5d. Locking hole; 6. Pin; 7. Alignment pin; 8. Locking screw; 9. Screw; 10. Handle rod. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort 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 this embodiment of the invention are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly. In addition, in this embodiment, the outer end refers to the end that runs radially outward, and the inner end refers to the end that runs radially inward; similarly, the outer surface refers to the surface on the side that runs radially outward, and the inner surface refers to the surface on the side that runs radially inward.

[0048] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0049] Combining 3 to Figure 19 As shown, this embodiment provides a positioning device for machining riveting holes in a partition assembly, including a base plate 1 and a plurality of positioning blocks 5 evenly distributed in a ring on the top surface of the base plate 1; a plurality of receiving grooves 5a for accommodating an arc-shaped frame are provided on the inner side surface of each positioning block 5; a support platform 5b is provided at the bottom of the inner side surface of the positioning block 5 for supporting the arc-shaped frame and the ring component; a riveting guide hole 5c is provided on the positioning block 5; an expansion block 2 is slidably installed on the top surface of the base plate 1 for tightening the ring component, and one expansion block 2 is provided for each positioning block 5; a driving mechanism is provided on the top surface of the base plate 1, and one driving mechanism is provided for each expansion block for driving the expansion block 2 to slide radially. 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-shaped block 2a and a rectangular slide rod 2b integrally formed on the arc-shaped block 2a; a slot 2c is provided on the outer surface of the arc-shaped block 2a, and the position of the slot 2c corresponds to the position of the riveting guide hole 5c. When machining the riveting hole on the partition assembly, the slot 2c provides clearance for the drill bit, preventing it from drilling into the expansion block 2.

[0051] In this embodiment, multiple guide plates 3 are evenly distributed in a ring on the top surface of the base plate 1; U-shaped grooves 3a are provided on the guide plates 3; the rectangular slide rod 2b is slidably inserted into the U-shaped grooves 3a. Further, the driving mechanism includes a support 4 and a screw 9 screwed onto the support 4; the support 4 is fixedly installed on the base plate 1; a slot 2d is provided at the end of the rectangular slide rod 2b; the outer end of the screw 9 is engaged in the slot 2d; a handle 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 in the radial direction.

[0052] When the expansion block 2 moves radially outward and tightens the ring, a pin 6 is inserted into the guide plate 3 and the rectangular slide rod 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 rod 2b. When the expansion block 2 moves radially outward and tightens the ring, the first pin hole 3b and the second pin hole 2e are aligned. At this time, the pin 6 can be inserted from the first pin hole 3b and downward into the second pin hole 2e, which restricts the radial movement of the expansion block 2 and prevents loosening during drilling. Furthermore, the outer circumferential surface of the gripping section of the pin 6 is provided with anti-slip knurling to prevent slippage and facilitate the worker's gripping of the pin 6 for insertion and removal operations.

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

[0054] In this embodiment, a alignment pin 7 is inserted into one of the positioning blocks 5. The purpose of setting the alignment pin 7 is to facilitate alignment when machining using a CNC program.

[0055] In this embodiment, after all the positioning blocks 5 are assembled on the base plate 1, the support platform 5b is machined. It is required that the table surface of the support platform 5b on all the positioning blocks 5 is on 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, there are seven positioning blocks 5, and correspondingly, there are also seven expansion blocks 2.

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

[0058] S1. Place the bow-shaped frame in the receiving slot 5a of the positioning block 5, and let the lower end of the bow-shaped frame abut against the table surface of the support platform 5b.

[0059] S2. Place the ring component inside the positioning device, and support platform 5b is supported on the lower end face of the ring component;

[0060] S3. The expansion block 2 is driven to move radially outward using the drive mechanism and tighten the ring, so that the bow-shaped frame fits against the outer circumferential surface of the ring.

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

[0062] Furthermore, in step S1, after placing the bow-shaped frame in the receiving groove 5a, the locking screw 8 is screwed onto the threaded hole on the bow-shaped frame through the locking hole 5d on the positioning block 5 to lock the bow-shaped frame.

[0063] In step S3, when the expansion block 2 moves radially outward to tighten the ring into place, a pin 6 is inserted on the guide plate 3 and the rectangular slide rod 2b.

[0064] In step S4, when machining the riveting holes on the partition assembly, CNC machining or manual hole enlargement can be used.

[0065] If CNC machining is used, a alignment pin 7 is inserted on one of the positioning blocks 5. This allows for the reuse of a machining program to batch process the riveting holes of the partition assembly. Furthermore, steps S1 to S4 can be repeated to process the riveting holes of each partition assembly. Subsequent machining can also be performed using the alignment pin 7 for alignment and positioning, thus improving machining efficiency, saving manufacturing costs, ensuring the consistency of the riveting holes in each partition assembly, and improving the machining quality of the riveted parts.

[0066] When using manual hole enlargement for processing, multiple people can process the riveting holes of the same partition assembly simultaneously, improving processing efficiency.

[0067] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A positioning device for machining riveting holes in a partition assembly, the partition assembly being formed by riveting a circular ring to multiple bow-shaped frames; characterized in that, It includes a base plate (1) and multiple positioning blocks (5) evenly distributed in a ring on the top surface of the base plate (1); Multiple receiving grooves (5a) for accommodating the bow frame are provided on the inner surface of each positioning block (5); a support platform (5b) is provided at the bottom of the inner surface of the positioning block (5) for supporting the bow frame and the ring part; a riveting guide hole (5c) is provided on the positioning block (5). An expansion block (2) is slidably installed on the top surface of the base plate (1) for tightening the ring component, and one expansion block (2) is provided for each positioning block (5); a driving mechanism is provided on the top surface of the base plate (1), and one driving mechanism is provided for each expansion block for driving the expansion block (2) to slide radially; The expansion block (2) includes an arc-shaped block (2a) and a rectangular slide bar (2b) integrally formed on the arc-shaped block (2a); a slot (2c) is provided on the outer surface of the arc-shaped block (2a), and the position of the slot (2c) corresponds to the position of the riveting guide hole (5c).

2. The positioning device for machining riveting holes in a partition assembly as described in claim 1, characterized in that, Multiple guide plates (3) are evenly distributed in a ring on the top surface of the base plate (1); a U-shaped groove (3a) is provided on the guide plate (3); the rectangular slide rod (2b) is slidably inserted into the U-shaped groove (3a).

3. The positioning device for machining riveting holes in a partition assembly as described in claim 2, characterized in that, The drive mechanism includes a support (4) and a screw (9) screwed onto the support (4); the support (4) is fixedly installed on the base plate (1); a slot (2d) is provided at the end of the rectangular slide bar (2b); the outer end of the screw (9) is engaged in the slot (2d); and a handle (10) is provided at the inner end of the screw (9).

4. The positioning device for machining riveting holes in a partition assembly as described in claim 2, characterized in that, When the expansion block (2) moves radially outward and tightens the ring, a pin (6) is inserted into the guide plate (3) and the rectangular slide bar (2b), and anti-slip knurling is provided on the outer peripheral surface of the gripping section of the pin (6).

5. A positioning device for machining riveting holes in a partition assembly as described in claim 1, characterized in that, A locking hole (5d) is provided on the groove wall of the receiving groove (5a), and a locking screw (8) is provided on the locking hole (5d).

6. The positioning device for machining riveting holes in a partition assembly as described in claim 1, characterized in that, A centering pin (7) is inserted on one of the positioning blocks (5).

7. The positioning device for machining riveting holes in a partition assembly as described in claim 1, characterized in that, After all the positioning blocks (5) are assembled on the base plate (1), the support platform (5b) is machined. It is required that the table surface of the support platform (5b) on all the positioning blocks (5) is on 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.

8. A method for machining riveting holes in a partition assembly, characterized in that, The positioning device according to any one of claims 2 to 4 includes the following steps: S1. Place the bow-shaped frame in the receiving slot (5a) of the positioning block (5), and the lower end of the bow-shaped frame abuts against the table surface of the support platform (5b). S2. Place the ring inside the positioning device, and support platform (5b) is supported on the lower end face of the ring; S3. Use the drive mechanism to drive the expansion block (2) to move outward along the radial direction and tighten the ring, so that the bow frame fits against the outer circumferential surface of the ring; S4. Use the riveting guide hole (5c) on the positioning block (5) to guide the drill bit and process the riveting hole on the partition assembly.

9. A method for machining riveting holes in a partition assembly as described in claim 8, characterized in that, In step S1, after placing the bow frame in the receiving groove (5a), the locking screw (8) is screwed into the threaded hole on the bow frame through the locking hole (5d) on the positioning block (5) to lock the bow frame. In step S3, when the expansion block (2) moves radially outward to tighten the ring into place, a pin (6) is inserted on the guide plate (3) and the rectangular slide rod (2b); In step S4, when machining the rivet holes on the partition assembly, CNC machining or manual hole enlargement can be used; if CNC machining is used, a locating pin (7) is inserted on one of the positioning blocks (5).

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