Automatic drilling and riveting machine

Abstract

The utility model relates to the technical field of drilling and riveting, in particular to an automatic drilling and riveting machine which comprises a working table, a controller arranged on the working table, a rotary table rotationally connected to the working table, a rotation driving mechanism used for driving the rotary table to rotate and a supporting clamp arranged on the rotary table. The drilling machine and the riveting machine are arranged on the workbench, the rotation driving mechanism is installed on the rotating disc, a feeding station is reserved between the drilling machine and the riveting machine, and the drilling end of the drilling machine and the riveting end of the riveting machine are consistent in height and both face the position over the axis of the rotating disc; according to the utility model, the situation that the drilling position is easy to misplace can be avoided, the qualified rate of drilling is ensured, the lap joint section and the outer cylinder can be supported when the rivet is plastically deformed in the riveting hole 704 by applying external force, the situation that the drilling position is easy to deform is avoided, and the connection strength after the outer cylinder and the lap joint section are riveted is ensured.

Description

Technical Field

[0001] This utility model relates to the field of drilling and riveting technology, specifically to an automatic drilling and riveting machine. Background Technology

[0002] Existing heat shields for aero-engine afterburners include an inner cylinder 702 and an outer cylinder 701 arranged coaxially. An overlapping section 703 connects the inner cylinder 702 and the outer cylinder 701. After spot welding the overlapping section 703 to the inner cylinder 702 and the outer cylinder 701, multiple through-holes 704 need to be machined into the outer cylinder 701 and the overlapping section 703. External force is then applied to cause the rivets to undergo plastic deformation within the rivet holes 704, thereby achieving the purpose of fastening the outer cylinder 701 and the overlapping section 703. However, due to the thinness of the heat shield material, the outer cylinder 701 and the overlapping section 703... The material is GH3128 with a thickness of only 0.6mm. There is no supporting structure between the inner cylinder 702 and the overlapping section 703, or between the overlapping section 703 and the outer cylinder 701. The parts have poor rigidity. When drilling the riveting hole 704, the outer cylinder 701 and the overlapping section 703 are easily deformed by the drill bit pressure, which leads to misalignment at the drilled hole and affects the drilling pass rate. In addition, when external force is applied to cause the rivet to undergo plastic deformation in the riveting hole 704, the lack of supporting structure will also cause deformation at the drilled hole, affecting the connection strength of the outer cylinder 701 and the overlapping section 703 after riveting. Utility Model Content

[0003] The purpose of this utility model is to address the above-mentioned shortcomings by providing an automatic drilling and riveting machine. This machine can not only avoid misalignment at the drilling point and ensure the pass rate of drilling, but also support the lap section and outer cylinder when external force is applied to cause plastic deformation of the rivet in the riveting hole, thus preventing deformation at the drilling point and ensuring the connection strength of the outer cylinder and lap section after riveting.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic drilling and riveting machine includes a worktable, a controller mounted on the worktable, a turntable rotatably connected to the worktable, a rotation drive mechanism for driving the turntable to rotate, a support fixture mounted on the turntable, a drilling machine and a riveting machine mounted on the worktable, the rotation drive mechanism being mounted on the turntable, a feeding station being provided between the drilling machine and the riveting machine, the drilling end of the drilling machine and the riveting end of the riveting machine being at the same height and both facing directly upwards at the axis of the turntable, and the rotation drive mechanism, the support fixture, the drilling machine and the riveting machine being electrically connected to the controller.

[0006] Furthermore, the support fixture includes a plurality of support seats arranged in a circumferential array for driving the plurality of support seats toward or away from the fixture drive assembly, which is mounted on a turntable.

[0007] Furthermore, the multiple support seats are arranged at equal angles with the axis of the turntable as the center.

[0008] Furthermore, the support base includes a base and a support block vertically fixed on the base. The support block is provided with an arc surface, and a relief groove is provided radially on the arc surface.

[0009] Furthermore, the turntable is provided with multiple straight sliding grooves, each corresponding to a support base. The turntable has a circular cavity. The clamping drive assembly includes a drive disk rotatably connected to the circular cavity, a reduction motor fixed to the turntable, and a slider slidably connected to the straight sliding groove. The output end of the reduction motor passes through the circular cavity to drive the drive disk. The drive disk is provided with multiple drive slots, which extend spirally outward about the axis of the turntable. One end of the slider is slidably connected to the drive slot, and the other end of the slider is fixedly connected to the support base.

[0010] Furthermore, an annular groove is provided on the workbench with the axis of the turntable as the center. The rotation drive mechanism includes a second reduction motor fixed on the workbench and multiple rollers rotatably connected to the bottom of the turntable. The output end of the second reduction motor drives the turntable. During the rotation of the turntable driven by the second reduction motor, the rollers roll along the annular groove.

[0011] The beneficial effects of this utility model are:

[0012] In practical applications, the spot-welded heat shield of the afterburner chamber of an aero-engine is placed on a turntable and supported by a support fixture. During the intermittent rotation of the turntable driven by the rotation drive mechanism, riveting holes are drilled in the overlapping section and the outer cylinder using a drilling machine. When the riveting holes rotate to the loading station, workers insert rivets into the drilled holes. As the riveting holes, carrying the rivets, rotate to the riveting machine, the riveting machine rivets the overlapping section and the outer cylinder. This invention not only avoids misalignment at the drilled holes, ensuring a high drilling pass rate, but also supports the overlapping section and the outer cylinder when external force is applied to cause plastic deformation of the rivets within the riveting holes, preventing deformation at the drilled holes and ensuring the connection strength of the riveted outer cylinder and overlapping section. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a top view of the present invention;

[0015] Figure 3 This is a schematic diagram of the structure of the turntable and support clamp in this utility model;

[0016] Figure 4 This is a cross-sectional view of the turntable and support fixture in use according to this utility model;

[0017] Reference numerals: 1. Workbench; 2. Controller; 3. Turntable; 31. Straight slide groove; 32. Circular cavity; 33. Roller; 4. Drilling machine; 5. Riveting machine; 611. Base; 612. Support block; 613. Arc surface; 614. Clearance groove; 621. Drive disc; 621. Drive groove; 622. Gear motor; 623. Slider; 701. Outer cylinder; 702. Inner cylinder; 703. Overlap section; 704. Riveting hole. Detailed Implementation

[0018] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an automatic drilling and riveting machine includes a worktable 1, a controller 2 mounted on the worktable 1, a turntable 3 rotatably connected to the worktable 1, a rotation drive mechanism for driving the turntable 3 to rotate, a support fixture mounted on the turntable 3, a drilling machine 4 and a riveting machine 5 mounted on the worktable 1. The rotation drive mechanism is mounted on the turntable 3. A feeding station is provided between the drilling machine 4 and the riveting machine 5. The drilling end of the drilling machine 4 and the riveting end of the riveting machine 5 are at the same height and are both positioned directly above the axis of the turntable 3. The rotation drive mechanism, the support fixture, the drilling machine 4, and the riveting machine 5 are all electrically connected to the controller 2.

[0019] In use, the spot-welded heat shield of the afterburner chamber of the aero-engine is placed on the turntable 3 and supported by a support fixture. During the intermittent rotation of the turntable 3 driven by the rotation drive mechanism, the drilling machine 4 drills riveting holes 704 on the overlapping section 703 and the outer cylinder 701. When the riveting hole 704 rotates to the loading station, the worker inserts a rivet into the drilled riveting hole 704. When the riveting hole 704, carrying the rivet, rotates to the riveting machine 5, the riveting machine 5 rivets the overlapping section 703 and the outer cylinder 701 with the rivet. This utility model can not only avoid the situation of easy misalignment at the drilled hole, ensuring the qualification rate of the drilled hole, but also support the overlapping section 703 and the outer cylinder 701 when an external force is applied to cause the rivet to undergo plastic deformation in the riveting hole 704, avoiding the situation of easy deformation at the drilled hole, and ensuring the connection strength of the outer cylinder 701 and the overlapping section 703 after riveting.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the support fixture includes multiple support seats arranged in a circumferential array, used to drive the multiple support seats to move closer to or away from the fixture drive assembly, which is mounted on the turntable 3. In this embodiment, the multiple support seats are driven away from each other by the fixture drive assembly, so as to abut the overlapping section 703 and the outer cylinder 701 of the afterburner heat shield of the aero-engine, so that it can support them when drilling the riveting hole 704 and riveting.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the multiple support seats are arranged at equal angles with the axis of the turntable 3 as the center. In this embodiment, when the multiple support seats are arranged at equal angles with the axis of the turntable 3 as the center, they can not only support the heat shield of the afterburner of the aero-engine, but also position it.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the support base includes a base 611 and a support block 612 vertically fixed on the base 611. The support block 612 is provided with an arc surface 613, and the arc surface 613 is provided with a radial clearance groove 614. In this embodiment, when in use, the support block 612 is inserted between the overlapping section 703 and the inner cylinder 702. The clearance groove 614 can avoid the overlapping section 703 and the outer cylinder 701 when drilling the riveting hole 704, and can also support them during riveting.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the turntable 3 has multiple radially arranged straight sliding grooves 31, each corresponding to a support base. A circular cavity 32 is provided within the turntable 3. The clamping drive assembly includes a drive disk 621 rotatably connected within the circular cavity 32, a reduction motor 622 fixed to the turntable 3, and a slider 623 slidably connected within the straight sliding grooves 31. The output end of the reduction motor 622 passes through the circular cavity 32 and drives the drive disk 621. The drive disk 621 has multiple drive slots 6211, which extend spirally outwards around the axis of the turntable 3. One end of the slider 623 is slidably connected within the drive slot 6211, and the other end is fixedly connected to the support base. In this embodiment... When the spot-welded heat shield of the afterburner of the aero-engine is placed on the turntable 3, the geared motor 622 drives the drive disk 621 to rotate. During this process, the drive disk 621 drives the slider 623 to slide along the straight slide groove 31 through the drive groove 6211, so that multiple support seats are moved away from each other. The arc surface 613 of the multiple support seats abuts the overlapping section 703 and the outer cylinder 701 of the heat shield of the afterburner of the aero-engine, so that it can support them during drilling and riveting of the riveting hole 704. This can not only avoid the situation of easy misalignment at the drilling point and ensure the qualification rate of drilling, but also support the overlapping section 703 and the outer cylinder 701 when external force is applied to cause plastic deformation of the rivet in the riveting hole 704, avoiding the situation of easy deformation at the drilling point, and ensuring the connection strength of the outer cylinder 701 and the overlapping section 703 after riveting.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an annular groove is provided on the workbench 1 with the axis of the turntable 3 as the center. The rotation drive mechanism includes a second geared motor fixed on the workbench 1 and multiple rollers 33 rotatably connected to the bottom of the turntable 3. The output end of the second geared motor drives the turntable 3. During the rotation of the turntable 3 driven by the second geared motor, the rollers 33 roll along the annular groove. In this embodiment, the turntable 3 is rotated by the second geared motor to send the riveting holes 704 on the heat shield of the afterburner of the aero-engine to the loading station and the riveting machine 5 in sequence.

[0025] The specific embodiments described herein are merely illustrative examples of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the scope defined by this utility model.

Claims

1. An automatic drilling and riveting machine, characterized in that: The device includes a worktable, a controller mounted on the worktable, a turntable rotatably connected to the worktable, a rotation drive mechanism for driving the turntable to rotate, a support fixture mounted on the turntable, and a drilling machine and a riveting machine mounted on the worktable. The rotation drive mechanism is mounted on the turntable, and a loading station is provided between the drilling machine and the riveting machine. The drilling end of the drilling machine and the riveting end of the riveting machine are at the same height and are both positioned directly above the axis of the turntable. The rotation drive mechanism, the support fixture, the drilling machine, and the riveting machine are all electrically connected to the controller.

2. The automatic drilling and riveting machine according to claim 1, characterized in that, The support fixture includes a plurality of support seats arranged in a circumferential array for driving the plurality of support seats toward or away from a fixture drive assembly, which is mounted on a turntable.

3. An automatic drilling and riveting machine according to claim 2, characterized in that, The multiple support bases are arranged at equal angles with the axis of the turntable as the center.

4. An automatic drilling and riveting machine according to claim 2, characterized in that, The support base includes a base and a support block vertically fixed on the base. The support block is provided with an arc surface and a relief groove is provided radially on the arc surface.

5. An automatic drilling and riveting machine according to claim 4, characterized in that, The turntable has multiple radiating straight sliding grooves, each corresponding to a support base. A circular cavity is formed within the turntable. The clamping drive assembly includes a drive disk rotatably connected within the circular cavity, a geared motor fixed to the turntable, and a slider slidably connected within the straight sliding grooves. The output end of the geared motor passes through the circular cavity to drive the drive disk. The drive disk has multiple drive slots that extend spirally outwards around the axis of the turntable. One end of the slider is slidably connected within the drive slot, and the other end of the slider is fixedly connected to the support base.

6. An automatic drilling and riveting machine according to claim 2, characterized in that, The workbench is provided with an annular groove centered on the axis of the turntable. The rotation drive mechanism includes a second geared motor fixed on the workbench and multiple rollers rotatably connected to the bottom of the turntable. The output end of the second geared motor drives the turntable. During the rotation of the turntable driven by the second geared motor, the rollers roll along the annular groove.

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