A fully automatic aviation nut closing machine

Abstract

The present invention discloses a fully automatic aviation nut closing machine and the field of aviation nut processing technology, which solves the problems of low closing precision of existing closing machines, easy wear of feeding mechanisms, and high requirements for the processing precision of parts, etc., and comprises: a machine table; a guide member; a rotating connecting frame, the rotating connecting frame comprises a power ring, and the power ring has at least two pressure wheels; an extrusion member, and the end of the extrusion member close to the pressure wheel has an inclined surface; a driving mechanism; wherein each pressure wheel is provided with a pin shaft, the pin shaft is installed on the power ring, the pressure wheel is rotatably connected with the pin shaft through a bearing, and an adjusting wheel is installed on the top of the pin shaft, and the adjusting wheel is not coaxial with the pressure wheel. Since the pressure wheel is matched with the inclined surface on the extrusion member, the pressure wheel extrudes the inclined surface to drive the extrusion member to move, thereby completing the closing process, and the closing precision is higher, the batch closing is more stable, and the output closing force is greater.

Description

Technical Field

[0001] The invention relates to the technical field of aviation nut processing, in particular to a fully automatic aviation nut high-precision closing machine. Background Art

[0002] After being assembled on the aircraft, titanium alloy and high-temperature alloy aviation nuts must have excellent anti-loosening function to achieve the high safety level standards of manned aircraft. After installation, they can obtain the specified precise locking torque, and there should be no loosening or falling off at any time during use. They have very high safety requirements; therefore, aviation nuts are widely used in the field of aerospace aircraft manufacturing; and the anti-loosening of aviation nuts is achieved through the closing process produced by extruding the nuts with high-precision two-point, three-point, or four-point special mold extrusion heads monitored by online process; therefore, the closing process is one of the necessary key processes in the processing of aviation nuts, and it needs to be carried out on a special high-precision aviation nut closing machine.

[0003] For example, the closing equipment with the publication number CN112192886A uses three servo motors to drive three closing dies to move radially respectively to close the nuts. However, this driving method has obvious defects, because the three sets of independent servo motors + low transmission ratio reducers + electric cylinders controlled by PLC cannot achieve micron-level synchronization, resulting in the three pressure heads being unable to contact the nuts at the same time when the three closing dies move, resulting in uneven force. In addition, due to the structural limitations of the arrangement of various components, the four-point closing function cannot be achieved. Secondly, when closing at four points, the synchronization of the molds is required to be higher, and this structure with poor synchronization cannot achieve the synchronization of the four pressure head molds to contact the nuts, but instead causes the aviation nuts to be damaged by uneven extrusion.

[0004] The nut closing machine with the publication number CN214023190U drives the seat body to move up and down. The extrusion piece on the seat body is wedge-shaped, and the extrusion piece and the mold body are matched with an inclined surface. When the seat body moves up and down, the extrusion piece will squeeze the mold body, thereby controlling multiple mold bodies to move synchronously along the radial direction. Although this driving method solves the problem of poor synchronization, the wedge-shaped body is sliding friction, resulting in low power transmission efficiency, insufficient closing force of the closing machine, usually only a few tons, for aviation nuts with larger diameters or high-temperature alloy nuts with elliptical closing requirements, because the closing pressure is too small, resulting in insufficient closing force and inability to close. At the same time, because the sliding friction of the wedge-shaped body is used for feeding, rapid wear of the feeding mechanism occurs, resulting in unstable accuracy.

[0005] The aviation nut closing machine with the publication number CN118204446A solves the problem of poor synchronization. It opens an arc hole on the feed platen, and the arc hole cooperates with the pressure wheel at the end of the die slide. When the feed platen rotates, the pressure wheel slides along the trajectory of the arc hole, thereby driving all the die slides to move synchronously along the radial direction, and the pressure head at the front end of the die slide will close the aviation nut. However, this driving method has very high requirements on the curvature and processing accuracy of the arc hole on the feed platen. If the accuracy deviation between each arc hole is too large, it is possible that all the die slides cannot move synchronously, and there will be a certain deviation, which will eventually affect the closing processing accuracy of the aviation nut. At the same time, in order to realize a multi-functional closing of two points, three points, four points, etc. on a feed platen, this leads to excessive metal entity removal of the feed platen. In addition, this structure limits the thickness of the feed platen, which eventually leads to an increase in the distortion and deformation of the feed platen when the nut needs a large force to close, resulting in instability. Summary of the invention

[0006] The present invention is to solve all the above-mentioned problems and at the same time achieve the purpose of higher closing accuracy, more stable batch closing, greater actual output closing force, and closing process monitoring, and designs a fully automatic high-precision aviation nut closing machine, which solves the problems of incomplete functions of existing closing machines, low closing accuracy, unstable closing, easy wear of feeding mechanisms, high requirements on the processing accuracy of parts, and easy impact on the closing processing accuracy of nuts due to poor accuracy.

[0007] The technical solution of the present invention to achieve the above-mentioned purpose is a fully automatic aviation nut closing machine, comprising:

[0008] Machine;

[0009] A guide member, wherein the guide member comprises a guide plate, the guide plate is fixed on the machine platform, and the guide plate has at least two guide grooves, the guide grooves extend along the radial direction of the guide plate, and the directions of all the guide grooves point to the same processing position, and the processing position is located at the center of the guide plate;

[0010] A rotating connecting frame, the rotating connecting frame includes a power ring, the power ring is rotatably connected to the machine table, the center of the guide plate coincides with the center of the power ring, the power ring has at least two rotatable pressing wheels, and the power ring can rotate around the processing position;

[0011] An extrusion piece, each guide groove is slidably connected with the extrusion piece, the end of the extrusion piece close to the processing position has a pressure head, the end of the extrusion piece close to the pressing wheel has an inclined surface matched with the pressing wheel, and the pressing wheel corresponds to the inclined surface one by one;

[0012] A driving mechanism, the driving mechanism is drivingly connected to the rotating connecting frame to drive the rotating connecting frame to rotate;

[0013] Each of the pressure wheels is provided with a pin shaft, which is installed on a power ring. The pressure wheel is rotatably connected to the pin shaft through a bearing. An adjusting wheel is installed on the top of the pin shaft. The adjusting wheel and the pressure wheel are not coaxial. A pin is inserted on the adjusting wheel to prevent the adjusting wheel from rotating. The pin passes through the adjusting wheel and is plugged into the power ring. When the adjusting wheel rotates, the position of the pressure wheel can be fine-tuned so that the pressure wheel is close to the inclined surface on the extrusion piece.

[0014] Furthermore, a detachable wedge block is installed at one end of the extrusion member close to the pressing wheel, and the inclined surface on the wedge block is in close contact with the pressing wheel.

[0015] Furthermore, a turntable is fixedly installed at the bottom of the power ring, a base is fixedly installed at the bottom of the turntable, the base is rotatably connected to the machine, a linear bearing flange is fixedly arranged on the machine, the upper end of the linear bearing flange passes through the base and the turntable, and is fixedly connected to the bottom of the guide plate.

[0016] Furthermore, an oil pan is provided at the bottom of the power ring, and the oil pan is fixed on the base. A protective cover is fixedly installed on the power ring, and a guide rail cover is fixedly installed on the guide rail plate. The centers of the protective cover and the guide rail cover have holes that pass through from top to bottom.

[0017] Furthermore, a telescopic rod that can move up and down is provided at the processing position, and the top end of the telescopic rod has a supporting portion for supporting the product to be processed.

[0018] Furthermore, a heating mechanism is provided on one side of the power ring, the heating mechanism has a heating coil, a heating hole is provided in the middle of the heating coil, and the heating hole is coaxial with the telescopic rod.

[0019] Furthermore, an air nozzle fixing frame is fixedly mounted on the guide rail plate, an air blowing nozzle is mounted on the top of the air nozzle fixing frame, and the air blowing nozzle is connected to an external air source through an air pipe.

[0020] Furthermore, a yaw bracket is fixedly installed on the machine platform, a rotating shaft is fixedly installed on the yaw bracket, the driving mechanism includes a connecting frame, an electric cylinder horizontally installed and fixed on the connecting frame, a reducer connected to the electric cylinder, and a servo motor connected to the reducer, the output end of the electric cylinder is hinged to the power ring, and the connecting frame is rotatably connected to the rotating shaft.

[0021] Compared with the prior art, the beneficial effects are:

[0022] The present invention drives the rotary connecting frame to rotate by a driving mechanism. During the rotation of the rotary connecting frame, the pressure wheel on the rotary connecting frame will slide relative to the inclined surface on the extrusion piece and squeeze the extrusion piece, so that the extrusion piece slides along the guide groove on the guide piece. All the extrusion pieces will move synchronously, and the pressure head at the front end of the extrusion piece will squeeze the nut on the support block to perform closing processing on it. The driving mechanism drives the rotary connecting frame to rotate laterally, so the extrusion force applied by the pressure wheel to the extrusion piece is very large, and the closing force can usually reach about 20 tons. At the same time, since the pressure wheel cooperates with the inclined surface on the extrusion piece, the processing accuracy requirements for each component are not high, the structure is simple, the synchronization is good, the fully automatic precision closing processing of high-lock nuts can be realized, and the production efficiency is high. The pressure applied by each pressure head to the aviation nut is the same, and the aviation nut is subjected to more uniform force, which can meet the closing processing of nuts of different specifications and is suitable for mass production and processing of nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the fully automatic aviation nut closing machine of the present invention;

[0024] Figure 2 yes Figure 1 The structural diagram of each component on the processing position on the left side of the middle;

[0025] Figure 3 yes Figure 2 A magnified view of the structure at center A;

[0026] Figure 4 It is a structural diagram of the vibration feeding mechanism;

[0027] Figure 5 It is a schematic diagram of the structure of the gripping robot;

[0028] Figure 6 It is a structural schematic diagram of the driving mechanism;

[0029] Figure 7 It is a schematic diagram of the installation structure of the power ring and the protective cover;

[0030] Figure 8 It is a schematic diagram of the installation structure of the power ring, the guide plate and the extrusion part;

[0031] Fig. 9 yes Figure 8 Schematic diagram of the structure when the power ring is removed;

[0032] Fig.10 It is a schematic diagram of the structure of the guide plate;

[0033] Fig.11 Schematic diagram of the installation structure of the telescopic rod and the support block;

[0034] Fig.12It is a structural schematic diagram of the heating mechanism;

[0035] Fig.13 It is a schematic diagram of the wedge block at the end of the extrusion piece and the pressure wheel;

[0036] Fig.14 It is a top view of the guide plate with three types of closing methods.

[0037] In the figure, 1, machine table; 2, power ring; 3, vibration feeding mechanism; 4, gripping robot; 41, gripper; 5, heating mechanism; 51, heating coil; 52, hanger; 53, adjustment seat; 54, heater; 55, temperature meter; 6, protective cover; 7, guide rail cover; 8, deflection bracket; 9, driving mechanism; 91, coupling frame; 92, reducer; 93, servo motor; 94, electric cylinder; 941, pressure sensor Sensor; 10, telescopic rod; 11, cylinder; 12, air nozzle fixing bracket; 13, air blowing nozzle; 14, rotating shaft; 15, base; 16, extrusion piece; 17, pressure head; 18, wedge block; 19, pressure wheel; 20, oil receiving tray; 21, turntable; 22, guide plate; 221, guide groove; 23, support block; 231, positioning part; 24, wedge clamping block; 25, pin shaft; 251, adjusting wheel; 26, pin. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0039] like Figure 1 , Figure 2 As shown, a preferred embodiment of the present invention proposes a fully automatic high-precision closing machine for aviation nuts, which is used for closing processing of aviation nuts, and mainly comprises: a machine table 1, and components such as a vibration feeding mechanism 3, a clamping robot 4, a guide, a rotating connecting frame, and a driving mechanism 9 arranged on the machine table 1, wherein the closing machine has two processing positions, and each processing position has components such as a vibration feeding mechanism 3, a clamping robot 4, a guide plate 22, a power ring 2, and a driving mechanism 9.

[0040] The processing position on the left side of the machine 1 is used for three-point closing processing of the nut, and the processing position on the right side is used for two-point or four-point closing processing of the nut.

[0041] like Figure 7-Figure 9 As shown, a base 15 and a turntable 21 are provided at each processing position of the machine 1. There are through holes in the middle of the base 15 and the turntable 21. The base 15 is rotatably connected to the machine 1 through a bearing, and the turntable 21 is fixed to the base 15 by bolts.

[0042] The guide member includes a guide plate 22, which is a disc-shaped structure with high overall strength and high rigidity. The rotating connecting frame includes a power ring 2, and the power ring 2 is fixed on the turntable 21 and rotates with the base 15. The guide plate 22 is located in the through hole in the middle of the power ring 2. A linear bearing flange is fixedly installed at the bottom of the guide plate 22. The lower end of the linear bearing flange is fixed on the machine table 1, and the upper end is fixedly connected to the bottom center of the guide plate 22 by bolts, which supports the guide plate 22. When the power ring 2 rotates, the guide plate 22 does not rotate.

[0043] There is a through hole in the center of the guide plate 22, the lower end of the telescopic rod 10 is fixedly connected to the output end of the cylinder 11, and the upper end of the telescopic rod 10 passes through the machine platform 1, the base 15, the linear bearing flange, the turntable 21 and the through hole in the middle of the guide plate 22 in sequence, and the telescopic rod 10 is controlled to move up and down by the cylinder 11.

[0044] like Fig.11 As shown, a support block 23 is installed at the top of the telescopic rod 10. The center of the support block 23 protrudes upward to form a positioning portion 231. The positioning portion 231 is used to position the nut, and the support block 23 supports the nut.

[0045] refer to Fig.10 There are three guide grooves 221 on the guide plate 22 at the processing position on the left side of the machine 1. The guide grooves 221 extend radially outward from the center of the guide plate 22. An extrusion piece 16 is slidably connected in each guide groove 221. A pressing head 17 is installed at the front end of each extrusion piece 16. The three extrusion pieces 16 move together radially toward the center of the guide plate 22, and the outer periphery of the nut located on the support block 23 is processed at three points by the three pressing heads 17.

[0046] There are four guide grooves 221 on the guide plate 22 at the processing position on the right side of the machine 1, and the structure is the same as the above. It is just that the four extrusions 16 move together along the radial direction toward the center of the guide plate 22, and the outer periphery of the nut on the support block 23 is processed at four points by four pressure heads 17. The other two extrusions 16 can also be removed, and only two symmetrically distributed extrusions 16 are retained. The two extrusions 16 slide, so that the outer periphery of the nut on the support block 23 can be processed at two points by two pressure heads 17.

[0047] That is to say, there are two closing processing methods for the extruded part 16 on the right processing position of the machine 1, one is four-point closing processing, and the other is two-point closing processing. For details, please refer to Fig.14 The front end shapes of the pressure heads 17 of different closing methods may be different. The three-point closing method uses a single guide plate 22, while the two-point closing and four-point closing methods share a single guide plate 22.

[0048] The guide grooves 221 on each guide plate 22 are independent and do not intersect or overlap with each other, ensuring that the opening width of each guide groove 221 near the center end of the guide plate 22 is consistent. In this way, the extrusion member 16 will not deflect outward when sliding, thereby ensuring the sliding accuracy of the extrusion member 16. The rigidity of the guide grooves 221 can also be ensured, and it is not easy to deform due to thinning of the wall thickness.

[0049] refer to Figure 8 , Fig. 9 When the power ring 2 rotates, it drives the extrusion piece 16 to move along the radial direction of the guide plate 22. For this reason, three pressing wheels 19 are arranged on the power ring 2 on the left processing position of the machine table 1. The three pressing wheels 19 are evenly distributed along the circumference of the power ring 2. The pressing wheels 19 are rotatably connected to the power ring 2 through the pin shaft 25. The three pressing wheels 19 correspond to the three extrusion pieces 16 one by one.

[0050] A wedge block 18 is installed at the end of the extrusion 16 away from the pressure head 17. The wedge block 18 is fixed to the end of the extrusion 16 by a wedge clamping block 24. The wedge block 18, the extrusion 16 and the wedge clamping block 24 are all matched with inclined surfaces. The wedge clamping block 24 is fixed to the extrusion 16 by screws and applies downward pressure to the wedge block 18. With the cooperation of the inclined surface, the wedge block 18 will be tightly attached to the end of the extrusion 16.

[0051] The wedge block 18 has an inclined surface on one side close to the pressure wheel 19, and the pressure wheel 19 is in close contact with the inclined surface. The inclined surface can be a plane, so that the extrusion piece 16 can move at a constant speed, or a concave curved surface, so that the extrusion piece 16 can move at a variable speed. When the power ring 2 rotates, the pressure wheel 19 will slide along the inclined surface of the extrusion piece 16 and squeeze the extrusion piece 16, thereby driving the extrusion piece 16 to slide along the guide groove 221 on the guide plate 22 to close the nut. When the power ring 2 is reset, the extrusion piece 16 will also return to its original position (i.e., the open state) under the action of the spring.

[0052] That is to say, the extrusion piece 16 and the pressure wheel 19 in this embodiment are matched with each other in an inclined plane to control the movement of the extrusion piece 16. In this way, as long as the inclination of the inclined plane on each extrusion piece 16 is consistent, the consistency of the movement of all the extrusion pieces 16 can be guaranteed, and the requirements for the processing accuracy of parts are not high.

[0053] The wedge block 18 can be replaced according to different processing requirements. The slopes of the inclined surfaces on different wedge blocks 18 are inconsistent. Therefore, according to the different feed depths of the extrusion piece 16, wedge blocks 18 with different slopes can be replaced.

[0054] like Fig.13As shown, in order to ensure that the pressure wheel 19 can be closely attached to the inclined surface on the wedge block 18, the position of the pressure wheel 19 can be fine-tuned. Therefore, a pin 25 is provided on the pressure wheel 19, and the pressure wheel 19 is rotatably connected to the pin 25 through a bearing, and the pin 25 is inserted in the power ring 2. An adjusting wheel 251 is installed on the top of the pin 25. In this embodiment, the adjusting wheel 251 is coaxial with the pin 25 (that is, the center of the adjusting wheel 251 coincides with the center of the pin 25), while the pin 25 and the pressure wheel 19 are not coaxial, and the two are eccentrically arranged, and generally there is an eccentric distance of about 5 mm. In this way, when the adjusting wheel 251 is rotated, the pin 25 will also rotate. Since the pin 25 and the pressure wheel 19 are eccentric, when the pin 25 rotates, it will drive the pressure wheel 19 to be closely attached to the inclined surface on the wedge block 18, and eliminate the gap between the pressure wheel 19 and the inclined surface.

[0055] The adjusting wheel 251 and the pin shaft 25 may also be non-coaxial, while the pin shaft 25 and the pressing wheel 19 are coaxial, so that when the adjusting wheel 251 rotates, the position of the pressing wheel 19 can be fine-tuned so that the pressing wheel 19 is close to the inclined surface on the wedge block 18.

[0056] When the position of the pressure wheel 19 is adjusted, in order to prevent the adjusting wheel 251 from rotating, a pin 26 is inserted on the adjusting wheel 251. A plurality of semicircular grooves are provided on the outer circumference of the adjusting wheel 251, and the pin 26 passes through the grooves and is plugged into the power ring 2, so that the adjusting wheel 251 cannot rotate under the obstruction of the pin 26.

[0057] A plurality of circular holes may also be provided on the circumference of the adjusting wheel 251 , and the pin 26 passes through one of the circular holes and is plugged into the power ring 2 , which may also prevent the adjusting wheel 251 from rotating.

[0058] like Figure 7 , Fig. 9 As shown, a guide rail cover plate 7 is installed on the top of the guide rail plate 22, and the guide rail cover plate 7 is fixed to the guide rail plate 22 by bolts. There is a hole in the middle of the guide rail plate 22 to facilitate the clamping robot 4 to pick up and place the nut.

[0059] An oil receiving pan 20 is provided at the bottom of the turntable 21, and the oil receiving pan 20 is fixed on the base 15. The power ring 2 is located above the oil receiving pan 20, and the oil receiving pan 20 is used to hold the oil during the closing process. A protective cover 6 is fixedly installed on the power ring 2 by bolts, and the protective cover 6 has a through hole in the middle, and the protective cover 6 is used to prevent external dust from entering the power ring 2.

[0060] refer to Figure 6As shown, the driving mechanism 9 is used to drive the power ring 2 to rotate. The driving mechanism 9 is composed of a coupling frame 91, an electric cylinder 94, a reducer 92 and a servo motor 93, wherein a deflection bracket 8 is provided at each processing position on the machine table 1, and the coupling frame 91 is rotatably connected to the rotating shaft 14 installed on the deflection bracket 8, that is, the coupling frame 91 can rotate horizontally relative to the deflection bracket 8. The electric cylinder 94 is horizontally fixedly installed on the coupling frame 91, the reducer 92 is located at the tail end of the electric cylinder 94 and is transmission-connected thereto, and the servo motor 93 is transmission-connected to the reducer 92. When the servo motor 93 is working, it transmits power to the reducer 92, and then the reducer 92 transmits power to the electric cylinder 94, and controls the output end of the electric cylinder 94 to move telescopically.

[0061] The electric cylinder 94 is roughly tangent to the power ring 2, and the output end of the electric cylinder 94 is hinged to the outer periphery of the power ring 2. The electric cylinder 94 moves through the lead screw to push the power ring 2 to rotate, thereby driving the extrusion piece 16 to move and close the nut. Since the electric cylinder 94 pushes the power ring 2 to rotate, the rotational force of the power ring 2 is very large, so the pressure head 17 can obtain a large closing force, usually up to about 20 tons, and can close some nuts with very high hardness. While driving the power ring 2 to rotate, the drive mechanism 9 will also deflect relative to the deflection bracket 8 through the rotating shaft 14.

[0062] The electric cylinder 94 is provided with a pressure sensor 941, which detects the pressure applied by the electric cylinder 94 to the power ring 2. In this way, it is possible to determine whether the nut is closed in place by the pressure, and the actual closing force can be monitored in real time.

[0063] In other technical solutions, the driving mechanism 9 can also adopt driving modes such as air cylinder, oil cylinder, etc.

[0064] like Figure 2 , Figure 5 As shown, the vibrating feeding mechanism 3 and the gripping robot 4 are both located on one side of the power ring 2, wherein the gripping robot 4 is a multi-axis robot, which is fixedly mounted on the top of the yaw bracket 8, and the gripping robot 4 has three jaws 41 that can be opened and closed. The three jaws 41 can be inserted into the inner circumference of the nut, and then the gripping robot 4 controls the three jaws 41 to expand outward, thereby propping up and gripping the nut.

[0065] like Figure 4 As shown, the vibration feeding mechanism 3 is composed of a vibration plate and a direct vibration component. The vibration plate transmits the nuts to the direct vibration component by vibration, and then the direct vibration component transmits the nuts to the specified position in a linear arrangement by vibration. A material separation mechanism is provided at the discharge end of the direct vibration component, which is used to separate the nuts one by one so that the gripping robot 4 can grasp them.

[0066] refer to Figure 3 An air nozzle fixing frame 12 is also fixedly installed on the guide rail plate 22, and an air blowing nozzle 13 is fixedly installed on the top of the air nozzle fixing frame 12. The air blowing nozzle 13 is connected to an external air source through an air pipe. The air blowing nozzle 13 can blow out flat wind to blow the nut off the supporting block 23.

[0067] At the beginning, the cylinder 11 controls the telescopic rod 10 to move upward, and the support block 23 on the telescopic rod 10 will be higher than the height of the power ring 2. Then the gripping robot 4 grips the nut from the vibration feeding mechanism 3 and transfers it to the support block 23. Then the telescopic rod 10 descends, and the nut reaches the center of the guide plate 22 for closing processing. After the processing is completed, the telescopic rod 10 will lift the nut to the height of the blowing nozzle 13, and the blowing nozzle 13 will blow the nut off the support block 23, thereby completing the unloading.

[0068] The processing position on the left side of the machine table 1 is used for processing large-diameter nuts, so a heating mechanism 5 is also provided at the processing position.

[0069] refer to Fig.12 The heating mechanism 5 is composed of a hanger 52, an adjustment seat 53 mounted on the hanger 52, a heater 54 mounted on the adjustment seat 53, and a heating coil 51 mounted on the heater 54. The position of the heater 54 can be adjusted by the adjustment seat 53, and then the position of the heating coil 51 can be adjusted. A temperature measuring instrument 55 is installed on the top of the hanger 52 to detect the heating temperature of the nut.

[0070] There is a heating hole in the middle of the heating coil 51. The heating coil 51 is located directly above the guide plate 22 and is coaxial with the telescopic rod 10 and the support block 23 below. The large-diameter nut needs to be heated before the closing process. The cylinder 11 will control the telescopic rod 10 to lift up and lift the nut into the heating hole in the middle of the heating coil 51. The heater 54 will energize and heat the heating coil 51, and then heat the nut. When the nut is heated to the specified temperature, the telescopic rod 10 will drop, and then prepare for the subsequent closing process.

[0071] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A fully automatic aviation nut closing machine, characterized in that: include: Machine (1); A guide member, the guide member comprising a guide plate (22), the guide plate (22) being fixed on the machine platform (1), the guide plate (22) having at least two guide grooves (221), the guide grooves (221) extending along the radial direction of the guide plate (22), and all the guide grooves (221) pointing to the same processing position, the processing position being located at the center of the guide plate (22); A rotating connecting frame, the rotating connecting frame comprising a power ring (2), the power ring (2) being rotatably connected to the machine platform (1), the center of the guide plate (22) being coincident with the center of the power ring (2), the power ring (2) having at least two rotatable pressing wheels (19), and the power ring (2) being capable of rotating around the processing position; An extrusion member (16), wherein each guide groove (221) is slidably connected with the extrusion member (16), the end of the extrusion member (16) close to the processing position has a pressure head (17), the end of the extrusion member (16) close to the pressing wheel (19) has an inclined surface matched with the pressing wheel (19), and the pressing wheel (19) corresponds to the inclined surface one by one; A driving mechanism (9), wherein the driving mechanism (9) is drivingly connected to the rotating connecting frame to drive the rotating connecting frame to rotate, the driving mechanism (9) comprises a connecting frame (91), an electric cylinder (94) horizontally mounted and fixed on the connecting frame (91), a reducer (92) drivingly connected to the electric cylinder (94), and a servo motor (93) drivingly connected to the reducer (92), the output end of the electric cylinder (94) is hinged to the outer periphery of the power ring (2), a deflection bracket (8) is fixedly mounted on the machine platform (1), a rotating shaft (14) is fixedly mounted on the deflection bracket (8), and the connecting frame (91) is rotationally connected to the rotating shaft (14); Each of the pressure wheels (19) is provided with a pin shaft (25), the pin shaft (25) being mounted on the power ring (2), the pressure wheel (19) being rotatably connected to the pin shaft (25) via a bearing, an adjusting wheel (251) being mounted on the top end of the pin shaft (25), the adjusting wheel (251) being not coaxial with the pressure wheel (19), a pin (26) being inserted on the adjusting wheel (251) for preventing the adjusting wheel (251) from rotating, the pin (26) passing through the adjusting wheel (251) being plugged into the power ring (2), a plurality of semicircular grooves being provided on the outer peripheral surface of the adjusting wheel (251), the pin (26) being plugged into the power ring (2) after passing through the grooves, and when the adjusting wheel (251) is rotated, the position of the pressure wheel (19) can be finely adjusted so that the pressure wheel (19) is closely attached to the inclined surface on the extrusion member (16).

2. A fully automatic aviation nut closing machine according to claim 1, characterized in that: A detachable wedge block (18) is installed at one end of the extrusion member (16) close to the pressing wheel (19), and the inclined surface on the wedge block (18) is in close contact with the pressing wheel (19).

3. The fully automatic aviation nut closing machine according to claim 1, characterized in that: A turntable (21) is fixedly mounted on the bottom of the power ring (2), a base (15) is fixedly mounted on the bottom of the turntable (21), the base (15) is rotatably connected to the machine platform (1), a linear bearing flange is fixedly arranged on the machine platform (1), the upper end of the linear bearing flange passes through the base (15) and the turntable (21), and is fixedly connected to the bottom of the guide plate (22).

4. A fully automatic aviation nut closing machine according to claim 3, characterized in that: An oil receiving pan (20) is provided at the bottom of the power ring (2), and the oil receiving pan (20) is fixed on the base (15). A protective cover (6) is fixedly mounted on the power ring (2), and a guide rail cover plate (7) is fixedly mounted on the guide rail plate (22). The centers of the protective cover (6) and the guide rail cover plate (7) are both provided with a hole that passes through from top to bottom.

5. The fully automatic aviation nut closing machine according to claim 1, characterized in that: A telescopic rod (10) that can move up and down is arranged at the processing position, and the top end of the telescopic rod (10) has a supporting portion for supporting the product to be processed.

6. A fully automatic aviation nut closing machine according to claim 5, characterized in that: A heating mechanism (5) is provided on one side of the power ring (2), the heating mechanism (5) having a heating coil (51), a heating hole in the middle of the heating coil (51), and the heating hole is coaxial with the telescopic rod (10).

7. The fully automatic aviation nut closing machine according to claim 1, characterized in that: An air nozzle fixing frame (12) is fixedly mounted on the guide rail plate (22), an air blowing nozzle (13) is mounted on the top of the air nozzle fixing frame (12), and the air blowing nozzle (13) is connected to an external air source via an air pipe.

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