Lower actuator of automatic drilling and riveting machine

Abstract

The utility model belongs to the technical field of drilling and riveting machines, and discloses a lower actuator of an automatic drilling and riveting machine. The device comprises an AC swing head unit, a riveting head unit is connected in the A-axis direction of the AC swing head unit, and the driving end of the riveting head unit is connected with a pressure foot unit; the riveting head unit comprises a shell connected to the A-axis direction of the AC swing head unit, an ejector block is arranged in the shell, a spring is arranged on the surface of the ejector block, a pressing plate, an electromagnetic coil, a driving plate and a partition plate are sequentially arranged at the other end of the spring from bottom to top, an amplifier is fixedly connected to the center of the surface of the partition plate through an embedding block, and limiting blocks are arranged on the outer side of the driving plate and the outer side of the partition plate. The center of the surface of the top block is connected with a guide rod, and the amplifier driving end is connected with a pressure foot unit. The device has the function of measuring the thickness of the wall plate and the height of the rivet pier head in any angle direction in real time, the quality change of the pier head can be found in time, and the riveting quality is improved. And meanwhile, the capability of monitoring the working condition of each station in real time is achieved, and machine collision is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling and riveting machines, in particular to a lower actuator of an automatic drilling and riveting machine. Background Art

[0002] In the assembly of metal components such as aircraft wall panels, riveting is still one of the most important connection methods at present, which occupies a huge workload. Traditional manual riveting has poor working conditions and low production efficiency. The quality of riveting is heavily dependent on the experience and skills of workers, and it does not meet the development requirements of aircraft digital assembly. Therefore, it is imperative to use automatic drilling and riveting machines to replace manual operation. However, the principle and structure of high-end automatic drilling and riveting machines are quite complicated. At present, only a few manufacturers in Europe and the United States have the ability to develop and manufacture them, such as EI, GEMCOR, BROETJE, etc. The development of high-end automatic drilling and riveting machines is still blank in China. Domestic aircraft wall panel riveting is either operated manually or with low-end equipment, or relies on imported automatic drilling and riveting machines from abroad.

[0003] Aircraft fuselage and wing panel processing requires riveting, and also requires testing the rivet head height and panel thickness. When using traditional panel processing, not only do you have to switch to multiple devices for processing, but you also cannot guarantee accuracy when manually measuring the rivet head quality and panel thickness, and it is time-consuming and labor-intensive. Quality problems cannot be discovered immediately, and cannot meet the needs of mass-production, high-quality panel processing. Utility Model Content

[0004] The utility model aims to provide a lower actuator of an automatic drilling and riveting machine to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A lower actuator of an automatic drilling and riveting machine comprises an AC swing head unit, a rivet head unit is connected to the A-axis direction of the AC swing head unit, and a pressure foot unit is connected to the driving end of the rivet head unit;

[0007] The rivet head unit comprises a shell connected to the AC swing head unit in the A-axis direction, a top block is arranged inside the shell, a spring is arranged on the surface of the top block, a pressure plate, an electromagnetic coil, a driving plate and a partition are arranged on the other end of the spring in order from bottom to top, an amplifier is fixedly connected to the center of the partition surface through a fitting block, a limiting block is arranged on the outside of the driving plate and the partition, a guide rod is connected to the center of the top block surface, and a pressure foot unit is connected to the driving end of the amplifier;

[0008] The pressure foot unit includes a cylinder body connected to the outside of the limit block, a cylinder head is connected to the top of the cylinder body, a lower pressure foot sleeve is arranged at the center of the surface of the cylinder head, the rivet rod passes through the cylinder head and is movably connected to the inside of the lower pressure foot sleeve, and a rivet button is arranged at the end of the rivet rod.

[0009] Further preferably, the AC swing head unit includes a C-axis drive motor, a drive end of the C-axis drive motor is connected to a crossbeam, two ends of the crossbeam are respectively provided with an A-axis drive end and an A-axis driven end, and a rivet head unit is connected between the A-axis drive end and the A-axis driven end.

[0010] Further preferably, a groove is provided on the outer side of the lower pressure foot cover.

[0011] Further preferably, an insulating rubber layer is provided on the outside of the electromagnetic coil, the electromagnetic coil is also electrically connected to a power supply, a first laser ranging sensor is also provided on the bottom of the shell, and a second laser ranging sensor is also provided on the outside of the shell.

[0012] Further preferably, a pinhole camera is also provided on the outer side of the cylinder head, and the cylinder head and the pinhole camera are tightly fixedly connected by a bracket and a fastening nut.

[0013] Further preferably, the guide rod passes through the spring, the pressure plate, the electromagnetic coil, the drive plate and the partition and is connected to the center of the bottom of the amplifier.

[0014] Further preferably, the guide rod and the amplifier are coaxially arranged.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The device can measure the wall thickness and rivet head height at any angle in real time through the AC swing head unit, riveting head unit and pressure foot unit, and can timely detect the change of the head quality, improve the riveting quality and prevent the occurrence of unqualified production batches. At the same time, it also has the ability to monitor the working conditions of each station in real time to prevent collisions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the AC swing head unit of the utility model;

[0019] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the connection structure of the lower pressure foot sleeve, the wall plate and the pressure foot sleeve before riveting and punching of the utility model;

[0021] Figure 5 It is a schematic diagram of the connection structure of the lower pressure foot sleeve, the wall plate and the pressure foot sleeve after riveting and punching of the utility model;

[0022] Figure 6 This is a schematic diagram of the internal structure of the rivet head unit before the riveting punch of the utility model;

[0023] Figure 7 This is a schematic diagram of the position for measuring the thickness of the wall panel of the utility model;

[0024] Figure 8 This is a schematic diagram of the partial structure of the pressure foot unit of the utility model;

[0025] In the figure: 1. AC swing head unit; 101. C-axis driving motor; 102. A-axis driving end; 103. A-axis driven end; 104. crossbeam; 2. rivet head unit; 201. top block; 202. limit block; 203. spring; 204. pressure plate; 205. electromagnetic coil; 206. driving plate; 207. partition; 208. fitting block; 209. amplifier; 210. insulating rubber layer; 211. guide rod; 212. power supply; 213. lower pressure foot sleeve; 214. rivet button; 215. first laser ranging sensor; 216. rivet rod; 217. pressure foot sleeve; 218. wall panel; 219. cylinder block; 220. cylinder head; 221. second laser ranging sensor; 222. pinhole camera; 223. bracket; 3. pressure foot unit. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 8 , the utility model provides a technical solution:

[0028] A lower actuator of an automatic drilling and riveting machine comprises an AC swing head unit 1, a rivet head unit 2 is connected to the A-axis direction of the AC swing head unit 1, and a pressure foot unit 3 is connected to the driving end of the rivet head unit 2;

[0029] The riveting head unit 2 includes a shell connected to the AC swing head unit 1 in the A-axis direction, a top block 201 is arranged inside the shell, a spring 203 is arranged on the surface of the top block 201, the top block 201 is fixedly connected to the spring 203 to limit the displacement of the lower end of the spring 203, and the other end of the spring 203 is sequentially provided with a pressure plate 204, an electromagnetic coil 205, a driving plate 206 and a partition 207 from bottom to top, an amplifier 209 is fixedly connected to the center of the surface of the partition 207 through a fitting block 208, a limiting block 202 is arranged on the outer side of the driving plate 206 and the partition 207, a guide rod 211 is connected to the center of the surface of the top block 201, and the driving end of the amplifier 209 is connected to the pressure foot unit 3;

[0030] The pressure foot unit 3 includes a cylinder body 219 connected to the outside of the limit block 202, a cylinder head 220 is connected to the top of the cylinder body 219, a lower pressure foot sleeve 213 is arranged at the center of the surface of the cylinder head 220, a rivet rod 216 passes through the cylinder head 220 and is movably connected to the inside of the lower pressure foot sleeve 213, and a rivet button 214 is arranged at the end of the rivet rod 216.

[0031] In the utility model, the AC swing head unit 1 includes a C-axis drive motor 101, the drive end of the C-axis drive motor 101 is connected to a crossbeam 104, the two ends of the crossbeam 104 are respectively provided with an A-axis drive end 102 and an A-axis driven end 103, and a rivet head unit 2 is connected between the A-axis drive end 102 and the A-axis driven end 103.

[0032] In the present invention, a groove is formed on the outer side of the lower pressure foot cover 213 .

[0033] In the present invention, an insulating rubber layer 210 is provided on the outside of the electromagnetic coil 205, and the electromagnetic coil 205 is also electrically connected to the power supply 212. A first laser distance sensor 215 is also provided on the bottom of the shell, and a second laser distance sensor 221 is also provided on the outside of the shell. The electromagnetic coil 205 is charged and discharged by the power supply 212, so that the driving plate 206 generates an induced current, and then induces an induced magnetic field that repel each other with the electromagnetic coil 205. The two magnetic fields generate a strong repulsive magnetic field force, which pushes the driving plate 206, the partition plate 207, the amplifier 209, the fitting block 208, the rivet rod 216 and the guide rod 211 to rivet upward, and then after the riveting process is completed, wait for the next riveting.

[0034] In the present invention, a pinhole camera 222 is also provided on the outside of the cylinder head 220, and the cylinder head 220 and the pinhole camera 222 are tightly connected by a bracket 223 and a fastening nut. The real-time status during the riveting process can be monitored, and if there is a problem, it is convenient for the staff to find it in time.

[0035] In the utility model, the guide rod 211 penetrates the spring 203, the pressure plate 204, the electromagnetic coil 205, the drive plate 206 and the partition plate 207 and is connected to the bottom center of the amplifier 209. The guide rod 211 and the amplifier 209 are coaxially arranged. When in use, the amplifier 209, the engaging block 208, the partition plate 207, the drive plate 206 and the guide rod 211 move as a whole, and the amplifier 209 and the guide rod 211 are coaxial, ensuring that the force is transmitted in a straight line during the riveting process.

[0036] In the present invention, a wall plate 218 is further provided on the outer side of the lower pressure foot sleeve 213, and a pressure foot sleeve 217 of the upper actuator is provided on the other side of the wall plate 218. The axes of the pressure foot sleeve 217 of the upper actuator and the lower pressure foot sleeve 213 are parallel to the normal line of the wall plate 218.

[0037] Embodiment 1: During the riveting process, the pressure foot sleeve 217 of the upper actuator is always in contact with the outer side of the wall plate 218, and the lower pressure foot sleeve 213 is in contact with the inner side of the wall plate 218, pushing the lower pressure foot sleeve 213, the amplifier 209, the fitting block 208, the partition plate 207 and the driving plate 206 to move downward to the initial position as a whole. At this time, the driving plate 206 is in contact with the electromagnetic coil 205, and the end face of the rivet rod 216 is in contact with the end face of the pier head of the rivet button 214, as shown in FIG. Figure 4 The upper actuator and the lower actuator of the drilling and riveting machine continue to apply pressure to the wall plate 218, and the rivet rod 216 continues to be compressed, so that the amplifier 209, the engaging block 208, the partition plate 207, and the driving plate 206 push the electromagnetic coil 205 and the pressure plate 204 to move downward and compress the spring 203. When compressed to a certain set value, the first laser distance sensor 215 senses and records the distance Dx between the first laser distance sensor 215 and the lower end surface of the pressure plate 204 at this time, and then determines the height of the pier head of a specific rivet button 214, and determines its height D1 as the standard pier head. After obtaining its compression spring 203, the distance D2 between the first laser distance sensor 215 and the lower end surface of the pressure plate 204, these two sets of values ​​have a corresponding relationship as standard values. After each riveting is completed, the rivet rod 216 performs the same steps, contacts the pier head end face of the rivet button 214 to be tested, compresses the lower pressure foot sleeve 213, amplifier 209, engaging block 208, partition 207 and driving plate 206 involved in riveting and punching, and compresses the spring 203. The first laser ranging sensor 215 records the distance Dx from the lower end face of the pressure plate 204 this time, and calculates the difference between the standard pier head D2 value and the pier head Dx value to be tested, thereby correcting the standard pier head height D1, and then the pier head height can be obtained.

[0038] A cylinder is arranged at the upper end of the rivet head unit 2. The cylinder body 219 is fixedly connected to the shell of the rivet head unit 2. The cylinder cover 220 moves up and down. A second laser distance sensor 221 is arranged at the lower end of the cylinder cover 220. When the pressure foot sleeve 217 of the upper actuator contacts the outer side of the wall panel 218, the lower pressure foot sleeve 213 contacts the inner side of the wall panel 218. When the pressure on the wall panel 218 continues to be applied, the lower pressure foot sleeve 213 pushes the cylinder cover 220 to move downward to achieve the purpose of buffering. When it descends to a certain height, the second laser distance sensor 221 senses and transmits the signal to the CNC system. The system will then record the position coordinates of the center point of the end face when the lower pressure foot sleeve 213 contacts the wall panel 218, and also record the position coordinates of the center point of the end face when the pressure foot sleeve 217 of the upper actuator contacts the wall panel 218. The coordinate values ​​of the center points of the end faces on both sides are calculated by the formula The distance between the two points can be calculated. Because the upper and lower actuators are coaxial during the riveting process, the calculated coordinate distance is always the shortest distance between the wall panels 218, which ensures that the measured value is the wall thickness of the wall panel 218.

[0039] The AC swing head unit 1 can swing within a certain angle driven by the C-axis driving motor 101, and the A-axis can also drive the rivet head unit 2 to swing within a certain range under the cooperation of the A-axis driving end 102 and the A-axis driven end 103, so that the lower actuator can measure the wall thickness in any direction.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lower actuator of an automatic drilling and riveting machine, comprising an AC swing head unit (1), characterized in that: The AC swing head unit (1) is connected to a rivet head unit (2) in the A-axis direction, and the driving end of the rivet head unit (2) is connected to a pressure foot unit (3); The rivet head unit (2) comprises a shell connected to the A-axis direction of the AC swing head unit (1), a top block (201) is arranged inside the shell, a spring (203) is arranged on the surface of the top block (201), a pressure plate (204), an electromagnetic coil (205), a driving plate (206) and a partition (207) are arranged in sequence from bottom to top at the other end of the spring (203), an amplifier (209) is fixedly connected to the center of the surface of the partition (207) through a fitting block (208), a limiting block (202) is arranged on the outside of the driving plate (206) and the partition (207), a guide rod (211) is connected to the center of the surface of the top block (201), and the driving end of the amplifier (209) is connected to the pressure foot unit (3); The pressure foot unit (3) comprises a cylinder body (219) connected to the outside of the limit block (202); the top of the cylinder body (219) is connected to a cylinder head (220); a lower pressure foot sleeve (213) is arranged at the center of the surface of the cylinder head (220); a rivet rod (216) passes through the cylinder head (220) and is movably connected to the inside of the lower pressure foot sleeve (213); and a rivet button (214) is arranged at the end of the rivet rod (216).

2. The lower actuator of the automatic drilling and riveting machine according to claim 1, characterized in that: The AC swing head unit (1) comprises a C-axis drive motor (101), the drive end of the C-axis drive motor (101) is connected to a crossbeam (104), the two ends of the crossbeam (104) are respectively provided with an A-axis drive end (102) and an A-axis driven end (103), and a rivet head unit (2) is connected between the A-axis drive end (102) and the A-axis driven end (103).

3. The lower actuator of the automatic drilling and riveting machine according to claim 1, characterized in that: A groove is formed on the outer side of the lower pressure foot cover (213).

4. The lower actuator of the automatic drilling and riveting machine according to claim 1, characterized in that: An insulating rubber layer (210) is arranged on the outside of the electromagnetic coil (205), and the electromagnetic coil (205) is also electrically connected to a power supply (212). A first laser distance measuring sensor (215) is also arranged on the bottom of the shell, and a second laser distance measuring sensor (221) is also arranged on the outside of the shell.

5. The lower actuator of the automatic drilling and riveting machine according to claim 1, characterized in that: A pinhole camera (222) is also provided on the outside of the cylinder head (220), and the cylinder head (220) and the pinhole camera (222) are tightly connected and fixed by a bracket (223) and a fastening nut.

6. The lower actuator of the automatic drilling and riveting machine according to claim 1, characterized in that: The guide rod (211) passes through the spring (203), the pressure plate (204), the electromagnetic coil (205), the driving plate (206) and the partition plate (207) and is connected to the bottom center of the amplifier (209).

7. The lower actuator of the automatic drilling and riveting machine according to claim 6, characterized in that: The guide rod (211) and the amplifier (209) are coaxially arranged.

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