A tool and method for bending lock plates in a narrow space

Abstract

A tool and method for bending lock plates in narrow spaces are disclosed. The tool includes a support block and a backing plate mounted on the support block. The bottom end face of the support block is configured as a support plane for abutting against the top surface A of the outer ring of the part. An arc-shaped surface is provided on the backing plate for abutting against the cylindrical surface B of the inner ring of the part. A groove is provided on the support block, extending vertically through the support block and open at its left end. A punch is provided within the groove, with its sidewalls slidingly engaging with the sidewalls of the groove. The lower end of the punch extends into the annular groove of the part. A wedge-shaped block is provided on the left side of the bottom of the punch. The tool also includes a driving mechanism for driving the punch to move left and right. This method uses the aforementioned tool. The lower end of the punch extends into the annular groove of the part, and the wedge-shaped block on the left side of the bottom of the punch is used to bend the lock plate to be bent. This tool has a simple structure, is lightweight, easy to operate, provides precise bending results, and does not damage the surface of the part.

Description

Technical Field

[0001] This invention relates to the field of aircraft engine assembly, and more particularly to a tool and method for bending locking plates in confined spaces. Background Technology

[0002] Currently, the main method for bending the locking plates of aero engines is to use a punch to apply force. After confirming the bending direction and angle, a punch of the corresponding size is selected to apply force to the locking plate at a certain angle, thereby achieving the effect of bending the locking plate. This method has three limitations: first, it requires a large space for the placement and application of force by the punch; second, the bending angle of the locking plate is not precise enough; and third, the process of applying force with the punch can easily damage the surface of the parts, and replacing the punch is cumbersome.

[0003] like Figure 1 The diagram shows the assembly structure of the locking piece 11 to be bent and part 10. Part 10 is an annular part, and the locking piece 11 to be bent is located at the bottom of the annular groove of part 10. Because the annular groove is relatively narrow, it is impossible to use a punch to apply force to bend the locking piece 11 upwards. Therefore, there is an urgent need for tools and methods for bending locking pieces in confined spaces to solve this problem. Figure 1 The problem of difficulty in bending the locking plate. Summary of the Invention

[0004] The main objective of this invention is to provide a tool and method for bending lock plates in narrow spaces, in order to solve the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention provides a tool for bending a locking plate in a narrow space, comprising a support block and a backing plate disposed on the support block; the bottom end face of the support block is configured as a support plane for abutting against the top surface A of the outer ring of the part; an arc-shaped surface is provided on the backing plate for abutting against the cylindrical surface B of the inner ring of the part; a sliding groove is provided on the support block, the sliding groove extending vertically through the support block and being open at the left end; a punch is disposed within the sliding groove, the sidewall of the punch slidingly engaging with the two sidewalls of the sliding groove; the lower end of the punch extends into the annular groove of the part; a wedge-shaped block is disposed on the left side of the bottom of the punch; and a driving mechanism is also included for driving the punch to move left and right.

[0006] Preferably, the support block is provided with a through slot extending vertically, the slot being located on the right side of the slide groove and communicating with the slide groove; the driving mechanism is a screw; the punch is provided with a transverse threaded hole; the screw is screwed into the threaded hole, and an annular groove is provided at the right end of the screw; a baffle is inserted into the slot of the support block; a slot is provided on the lower end face of the baffle, the slot being open at the lower end and engaging with the annular groove of the screw; the two side walls of the slot and the annular groove form a sliding fit.

[0007] Preferably, a countersunk hole is provided on the right side wall of the slot; the right end of the screw extends into the countersunk hole.

[0008] Preferably, the lower ends of the two side walls of the slot are provided as inclined guide slopes, and the two guide slopes are in the shape of an octagon.

[0009] Preferably, the left end of the screw is integrally formed with a hexagonal head; the hexagonal head has an external hexagonal structure.

[0010] Preferably, a slider is integrally formed at the top of the punch, so that the punch forms a T-shaped structure; a guide block is fixedly connected to the top of the support block; the groove at the bottom of the guide block and the top surface of the support block together form a guide groove; the slider is slidably disposed in the guide groove.

[0011] Preferably, a cylindrical pin is inserted laterally into the upper part of the baffle.

[0012] Preferably, a U-shaped handle is welded to the top surface of the support block.

[0013] Preferably, the right side of the support block is provided with a stepped surface, and the backing plate is fastened to the stepped surface by screws; the arc-shaped surface is then processed after the backing plate and the support block are combined.

[0014] On the other hand, the present invention also proposes a method for bending a locking plate in a narrow space, using the above-mentioned tool, including the following steps:

[0015] S1. First, adjust the drive mechanism to drive the punch to move to the right to its limit position;

[0016] S2. Place the entire bending tool on the part, so that the bottom end of the support block abuts against the top surface A of the outer ring of the part, while the arc-shaped surface of the backing plate abuts against the cylindrical surface B of the inner ring of the part.

[0017] S3. Adjust the drive mechanism to drive the punch to move to the left, so that the wedge block of the punch is inserted under the locking piece to be bent, and further drive the punch to move to the left until the wedge block bends the locking piece to be bent into place.

[0018] S4. Adjust the drive mechanism to drive the punch to move to the right, so that the wedge block of the punch disengages from the locking piece to be bent.

[0019] S5. Rotate the entire bending tool around the axis of the part so that the bottom surface of the support block slides on the top surface A of the outer ring of the part and the arc surface slides on the cylindrical surface B of the inner ring of the part. Move the entire bending tool to the next position of the part and repeat steps S3 to S4.

[0020] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0021] (1) In the tool provided by the present invention, the support block and the backing plate are used to position the part, and the lower end of the punch is inserted into the annular groove of the part. The driving mechanism drives the punch to move to the left, and then the wedge block set on the left side of the bottom of the punch is used to bend the locking piece to be bent. This tool has a simple structure, light weight, convenient operation, accurate bending effect and will not damage the surface of the part.

[0022] (2) In the workpiece provided by the present invention, since the slide groove runs through the support block from top to bottom and the left end is open, punches with different wedge block structures can be quickly replaced to change the bending angle of the locking plate. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the assembly structure of the locking plate and the parts to be bent.

[0025] Figure 2 A top view of the tool for bending locking plates in narrow spaces provided by the present invention;

[0026] Figure 3 for Figure 2 Sectional view of AA;

[0027] Figure 4 A three-dimensional structural diagram of the tool for bending locking plates in narrow spaces provided by the present invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the punch in this invention;

[0029] Figure 6 This is a top view of the support block and backing plate in this invention;

[0030] Figure 7 This is a schematic diagram of the baffle in this invention.

[0031] The following are the symbols and their meanings: 1. Screw; 2. U-shaped handle; 3. Support block; 3a. Slide groove; 3b. Slot; 3c. Countersunk hole; 3d. Stepped surface; 4. Baffle; 4a. Slot; 4b. Guide slope; 5. Cylindrical pin; 6. Guide block; 7. Backing plate; 7a. Arc surface; 8. Punch; 8a. Wedge block; 8b. Threaded hole; 8c. Slider; 9. Screw; 9a. Annular groove; 9b. Hexagonal head; 10. Part; 11. Locking piece to be bent. Detailed Implementation

[0032] 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.

[0033] 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 positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0034] like Figure 1 The diagram shows the assembly structure of the locking piece 11 to be bent and the part 10. Part 10 is an annular part, and the locking piece 11 to be bent is located at the bottom of the annular groove of part 10. Because the annular groove is relatively narrow, it is not possible to use a punch to apply force to bend the locking piece 11 upwards.

[0035] Combination Figures 2 to 7 As shown, this embodiment provides a tool for bending lock plates in narrow spaces, including a support block 3 and a backing plate 7 disposed on the support block 3; the bottom end face of the support block 3 is configured as a support plane for abutting against the top surface A of the outer ring of the part 10; an arc-shaped surface 7a is provided on the backing plate 7 for abutting against the cylindrical surface B of the inner ring of the part 10; a sliding groove 3a is provided on the support block 3, which extends vertically through the support block 3 and is open at the left end; a punch 8 is provided in the sliding groove 3a, and the side wall of the punch 8 slides in cooperation with the two side walls of the sliding groove 3a; the lower end of the punch 8 extends into the annular groove of the part 10; a wedge block 8a is provided on the left side of the bottom of the punch 8; and a driving mechanism is also included for driving the punch 8 to move left and right.

[0036] This embodiment also provides a method for bending a locking plate in a narrow space, using the aforementioned tool, and including the following steps:

[0037] S1. First, adjust the drive mechanism to drive the punch 8 to move to the right to its limit position;

[0038] S2. Place the entire bending tool on part 10, so that the bottom end of the support block 3 abuts against the top surface A of the outer ring of part 10, while the arc-shaped surface 7a of the abutment plate 7 abuts against the cylindrical surface B of the inner ring of part 10.

[0039] S3. Adjust the drive mechanism to drive the punch 8 to move to the left, so that the wedge block 8a of the punch 8 is inserted below the locking piece 11 to be bent, and further drive the punch 8 to move to the left until the wedge block 8a bends the locking piece 11 to be bent into place.

[0040] S4. Adjust the drive mechanism to drive the punch 8 to move to the right, so that the wedge block 8a of the punch 8 disengages from the locking piece 11 to be bent.

[0041] S5. Rotate the entire bending tool around the axis of part 10 so that the bottom surface of the support block 3 slides on the top surface A of the outer ring of part 10 and the arc surface 7a slides on the cylindrical surface B of the inner ring of part 10. Move the entire bending tool to the next position of part 10 and repeat steps S3 to S4.

[0042] Combination Figure 3 , Figure 6 and Figure 7 As shown, a through slot 3b is provided on the support block 3, located on the right side of the slide groove 3a and connected to it. The driving mechanism is a screw 9. A transverse threaded hole 8b is provided on the punch 8. The screw 9 is screwed into the threaded hole 8b, and an annular groove 9a is provided at the right end of the screw 9. A baffle 4 is inserted into the slot 3b of the support block 3. A slot 4a is provided on the lower end face of the baffle 4. The slot 4a is open at the lower end and engages with the annular groove 9a of the screw 9. The two side walls of the slot 4a form a sliding fit with the annular groove 9a. Since the slot 3b can restrict the left and right movement of the baffle 4, and the slot 4a engages with the annular groove 9a, the axial movement of the screw 9 is restricted. When the screw 9 is rotated, the screw 9 engages with the threaded hole 8b of the punch 8, which can drive the punch 8 to move left and right.

[0043] Combination Figure 3 As shown, in order to avoid interference between the right end of the screw 9 and the right side of the slot 3b, a clearance countersunk hole 3c is provided on the right side wall of the slot 3b; the right end of the screw 9 extends into the clearance countersunk hole 3c.

[0044] Combination Figure 3 and Figure 7 As shown, during assembly of the bending tool, the punch 8 with the screw 9 is first installed in the groove 3a of the support block 3. Then, the baffle 4 is inserted downwards from the slot 3b, so that the slot 4a engages with the annular groove 9a of the screw 9, thus completing the axial limiting function of the screw 9. To facilitate the engagement of the slot 4a into the annular groove 9a of the screw 9, the lower ends of the two side walls of the slot 4a are set as inclined guide slopes 4b. The two guide slopes 4b are V-shaped, thus serving a guiding function.

[0045] Combination Figure 3and Figure 4 As shown, the left end of the screw 9 has an integrally formed hexagonal head 9b; the hexagonal head 9b has an external hexagonal structure. The hexagonal head 9b is provided to facilitate the rotation of the screw 9 with a wrench.

[0046] Combination Figures 2 to 5 As shown, a slider 8c is integrally formed at the top of the punch 8, giving the punch 8 a T-shaped structure. A guide block 6 is fixedly connected to the top of the support block 3. The groove at the bottom of the guide block 6 and the top surface of the support block 3 together form a guide groove 6a. The slider 8c is slidably disposed within the guide groove 6a. Specifically, the guide block 6 is fixedly mounted on the top surface of the support block 3 by two screws 1 and a locating pin. Because the slider 8c makes the punch 8 a T-shaped structure, and the slider 8c can slide left and right within the guide groove 6a, the slider 8c not only stabilizes the left and right sliding of the punch 8, but also restricts the vertical position of the entire punch 8 in cooperation with the guide groove 6a.

[0047] Combination Figure 3 , Figure 4 As shown, a cylindrical pin 5 is horizontally inserted into the upper part of the baffle 4. In this embodiment, multiple sets of punches 8 with different parameters can be designed. When replacing the punch 8, the cylindrical pin 5 is pulled upward, causing the baffle 4 to exit from the slot 3b of the support block 3, so that the slot 4a of the baffle 4 disengages from the annular groove 9a of the screw 9. By pulling the screw 9 to the left, the punch 8 together with the screw 9 can be removed from the sliding groove 3a of the support block 3, thus realizing the quick-change function of the punch.

[0048] Combination Figures 2 to 4 As shown, a U-shaped handle 2 is welded to the top surface of the support block 3. The U-shaped handle 2 facilitates lifting the entire bending tool.

[0049] Combination Figure 4 As shown, in order to facilitate the installation of the back plate 7, a stepped surface 3d is provided on the right side of the support block 3, and the back plate 7 is fastened to the stepped surface 3d by screws; the arc-shaped surface 7a is then processed after the back plate 7 and the support block 3 are combined.

[0050] 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 tool for bending a locking plate in a narrow space, characterized in that, The utility model provides a tool for bending the inner ring of a part, comprising a support block (3), and a backrest (7) arranged on the support block (3); the end face of the bottom end of the support block (3) is arranged as a support plane for abutting against the top surface A of the outer ring body of the part (10); an arc surface (7a) is arranged on the backrest (7) for abutting against the cylindrical surface B of the inner ring body of the part (10); A sliding groove (3a) is arranged on the support block (3), which penetrates the support block (3) from top to bottom and has an open left end; A punch (8) is arranged in the sliding groove (3a), and the side wall of the punch (8) is in sliding fit with the two side walls of the sliding groove (3a); the lower end of the punch (8) extends into the annular groove of the part (10); a wedge block (8a) is arranged on the left side of the bottom of the punch (8); A driving mechanism is further arranged for driving the punch (8) to move leftward and rightward; An insertion groove (3b) is arranged on the support block (3) and penetrates the support block (3) from top to bottom, the insertion groove (3b) is located on the right side of the sliding groove (3a) and is in communication with the sliding groove (3a), and the driving mechanism is a screw rod (9); a transverse threaded hole (8b) is arranged on the punch (8); the screw rod (9) is screwed in the threaded hole (8b), and an annular recess (9a) is arranged at the right end of the screw rod (9); A baffle (4) is inserted in the insertion groove (3b) of the support block (3); a clamping groove (4a) is arranged on the lower end face of the baffle (4), the clamping groove (4a) has an open lower end and is clamped in the annular recess (9a) of the screw rod (9); the two side walls of the clamping groove (4a) are in sliding fit with the annular recess (9a); A clearance counterbore (3c) is arranged on the right side wall of the insertion groove (3b); the right end of the screw rod (9) extends into the clearance counterbore (3c); A sliding block (8c) is integrally formed at the top end of the punch (8), so that the punch (8) forms a T-shaped structure; a guide block (6) is fixedly connected to the top of the support block (3); the groove at the bottom of the guide block (6) and the top surface of the support block (3) jointly form a guide groove (6a); the sliding block (8c) is slidably arranged in the guide groove (6a); A stepped surface (3d) is arranged on the right side of the support block (3), and the backrest (7) is fastened to the stepped surface (3d) by screws; the backrest (7) and the support block (3) are combined, and then the arc surface (7a) is machined.

2. The tool for bending a locking tab in a narrow space according to claim 1, wherein The lower ends of the two side walls of the clamping groove (4a) are arranged as inclined guide inclined surfaces (4b), and the two guide inclined surfaces (4b) form a figure-of-eight shape.

3. The tool for bending a locking tab in a narrow space according to claim 1, wherein A hexagonal head (9b) is integrally formed at the left end of the screw rod (9); the hexagonal head (9b) has an outer hexagonal structure.

4. The tool for bending a locking tab in a narrow space according to claim 1, wherein A cylindrical pin (5) is transversely inserted in the upper part of the baffle (4).

5. The tool for bending a locking tab in a narrow space according to claim 1, wherein A U-shaped handle (2) is welded on the top surface of the support block (3).

6. A method for bending a lock plate in a narrow space, characterized in that, The tool according to any one of claims 1 to 5 comprises the following steps: S1, first adjust the driving mechanism to drive the punch (8) to move rightward to the limit position; S2, place the entire bending tool on the part (10) so that the bottom end of the support block (3) abuts against the top surface A of the outer ring body of the part (10), and the arc surface (7a) of the backrest (7) abuts against the cylindrical surface B of the inner ring body of the part (10); S3, adjust the driving mechanism to drive the punch (8) to move left, so that the wedge (8a) of the punch (8) is inserted below the to-be-bent locking piece (11), further drive the punch (8) to move left until the wedge (8a) bends the to-be-bent locking piece (11) to the right position; S4, adjust the driving mechanism to drive the punch (8) to move right, so that the wedge (8a) of the punch (8) is separated from the to-be-bent locking piece (11); S5, rotate the entire bending tool around the axis of the part (10), so that the bottom surface of the support block (3) slides on the top surface A of the outer ring body of the part (10), and the arc surface (7a) slides on the cylindrical surface B of the inner ring body of the part (10), move the entire bending tool to the next position of the part (10), repeat steps S3 to S4.

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