Automatic turnover device and method for aviation structural part machining

Abstract

The invention belongs to the technical field of machining, and particularly relates to an automatic turning device and method for aviation structural part machining, and the device comprises a fixed feeding and discharging power roller which is used for feeding a workpiece to be turned into a turning mechanism or sending out the turned workpiece; the overturning mechanism is used for receiving the workpiece to be overturned, overturning the workpiece after clamping the workpiece, and sending out the workpiece; the pneumatic driving mechanism is used for driving the turnover mechanism to turn over; the photoelectric detection in-place mechanism is used for detecting the movement position of the workpiece to be overturned or detecting whether the workpiece moves in place or not; and the electric control mechanism is used for controlling the turnover mechanism and the pneumatic driving mechanism to work according to a detection signal of the photoelectric detection in-place system.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to an automatic turning device and method for processing aviation structural parts. Background Art

[0002] Aviation structural parts have the characteristics of high dimensional accuracy, wide variety, large specification differences, thin-walled structures and multi-faceted features. During the machining process, multiple processing stations need to be converted to form part features. Generally, most aviation structural parts need to be processed in two stations because of their two-sided structural features, namely the first station where they are placed flat and the second station where they are flipped 180°. In the traditional machining process, the conversion of part processing stations is often done by operators manually flipping the parts. For larger raw materials, the single-sided features of the parts have been formed after the first station is completed. In the subsequent manual flipping process, the raw materials are large and heavy, which makes flipping laborious, and there are chips and coolant left on the workbench of the processing machine tool, which poses a great safety hazard and the resulting part quality risk. When the raw materials are large, multiple people are required to cooperate in flipping, and the flipping time is long, which prolongs the processing cycle and reduces production efficiency.

[0003] In the face of the growing demand for machined products, the machinery manufacturing industry has seen the emergence of more advanced manufacturing technologies, namely intelligent flexible production lines, in the continuous development and application of digitalization and intelligence. Flexible production lines are based on groups of CNC machine tools and are equipped with a variety of intelligent auxiliary production systems, including automatic feeding systems, automated control systems, automated positioning and clamping, automated monitoring systems, etc., to achieve intelligent control, monitoring and scheduling of the entire production line, expand production capacity, and significantly improve production efficiency.

[0004] As an auxiliary system of the flexible production line, the automatic flipping device is an indispensable part of the standardization of the parts manufacturing process. After the workpiece is processed at the first station, it is sent out of the production line from the fixed outlet for flipping. On the pallet sent out of the production line, the flipping space is small and may be equipped with tooling. Manual flipping poses great safety risks. In the intelligent flexible production line, manual intervention will inevitably become less and less. At present, in the operation of the production line, manual intervention only involves the clamping of raw materials. Manual intervention affects the production efficiency of the production line. Therefore, the use of automatic flipping devices instead of manual flipping further reduces human intervention in the flexible production line and improves the intelligence and standardization level of the production line.

[0005] The working principle of a general flipping machine is to rely on the power provided by the drive device, and transmit the power to the flipping component through the transmission mechanism, so that it moves around a certain axis to realize the flipping process. When using ordinary flipping machines for aviation structural parts, due to the large differences in the size and specifications of the raw materials, the smaller raw materials will slide on the placement plane during the flipping process. When they hit the side rollers and stop, the vibration caused by the collision will pose a quality risk to the parts and damage the flipping machine, posing a safety hazard. There are many sizes and specifications of aviation structural parts. How to fix the raw materials before flipping so that they do not slide on the placement plane and limit their movable space in the height direction has become a technical difficulty for the flipping device of aviation structural parts. In addition, the purpose of the flipping device in the flexible production line is to enable the parts to be flipped between multiple processing stations. When the parts are flipped, there are chips and cutting fluids left in the groove cavity. How to collect the fallen residues during the flipping process is also a problem that must be solved by the flipping device of aviation structural parts. Summary of the invention

[0006] Purpose of the invention: Aims to solve the problems mentioned in the background technology, and proposes an automatic flipping device and method for processing aviation structural parts, adding a holding device placed in a horizontal plane and a lifting limit device in the height direction, and adding sponge pads on the flat conveyor belt and the devices on both sides of the horizontal holding, and a cutting fluid drainage and collection device is set at the bottom of the clamping device on both sides and the flipping mechanism. Through the control of the electronic control system, the movement of different mechanisms of the flipping device is driven to realize the automatic flipping of parts and the recovery of cutting fluid and chips. Summary of the invention:

[0008] An automatic turning device for machining aviation structural parts, comprising:

[0009] Fixed feeding and discharging power rollers are used to feed the workpiece to be flipped into the flipping mechanism, or to send out the flipped workpiece;

[0010] The turning mechanism is used to receive the workpiece to be turned over, turn it over after clamping, and send it out;

[0011] A pneumatic driving mechanism, used for driving the turning mechanism to turn over;

[0012] Photoelectric detection positioning mechanism, used to detect the movement position of the workpiece to be flipped or whether it has moved into position;

[0013] The electric control mechanism is used to control the operation of the flip mechanism and the pneumatic drive mechanism according to the detection signal of the photoelectric detection positioning system.

[0014] Furthermore, the fixed feeding and discharging power rollers include:

[0015] Inlet and outlet power roller motor, power roller, driven roller, conveyor belt, roller, bracket;

[0016] The motor of the power roller for feeding and discharging materials is installed on the bracket to drive the power roller;

[0017] A conveyor belt is installed on the upper end of the bracket, and the two ends of the conveyor belt are connected to the power roller and the driven roller respectively. The power roller rotates under the drive of the feeding and discharging power roller motor, and the power roller drives the driven roller to rotate through the belt. The power roller and the driven roller jointly drive the conveyor belt to move;

[0018] Sponge-covered rollers are installed on both sides of the transmission belt to define the initial position of the workpiece and clamp the workpiece in the horizontal direction. The sponge can absorb the vibration during the flipping process, thereby achieving a stable and safe flipping process.

[0019] Further, the turning mechanism includes: a sliding power roller assembly, a lifting assembly, an upper power roller assembly, and a turning assembly;

[0020] One end of the sliding power roller assembly is in contact with the fixed feeding and discharging power roller and is kept horizontal. The sliding power roller assembly is used to receive the workpiece to be turned over and transfer it to the end and then clamp it perpendicular to the moving direction;

[0021] The lifting assembly is used to lift up the sliding power roller assembly so as to clamp the assembly to be flipped in the vertical direction together with the upper power roller assembly;

[0022] The flip assembly is driven by the pneumatic drive mechanism to drive the sliding power roller assembly and the upper power roller assembly and the workpiece to be flipped therein;

[0023] After flipping, the upper power roller assembly sends the flipped workpiece to the fixed feeding and discharging power roller.

[0024] Further, the flip assembly includes:

[0025] Slewing support bearing, tilting mechanism bracket, ground bracket;

[0026] The ground bracket is concave, with one end fixing the outer ring of the slewing support bearing and the other end fixing the pneumatic drive mechanism. The ground bracket supports and stabilizes the flipping process of the flip assembly;

[0027] The flipping mechanism bracket is in a U-shape, the left bracket is fixedly connected to the inner ring of the slewing support bearing, and the right bracket is fixedly connected to the output shaft of the pneumatic drive mechanism. The flipping mechanism is driven by the pneumatic drive mechanism to drive the workpiece to be flipped to flip together.

[0028] Further, the sliding power roller assembly includes: a sliding power roller, a horizontal fixed clamping end, a lower conveyor belt, a horizontal clamping cylinder, a horizontal movable clamping end, a roller, and a sliding power roller motor;

[0029] The sliding power roller motor drives the sliding power roller to rotate, thereby driving the lower conveyor belt to rotate;

[0030] The horizontal fixed clamping end and the horizontal movable clamping end are respectively arranged on both sides of the lower conveyor belt perpendicular to the moving direction, and are used to clamp the workpiece to be flipped, so as to complete the clamping and fixing of the workpiece to be flipped in the horizontal direction;

[0031] A limit plate is provided at the end of the horizontal fixed clamping end and is connected to the horizontal movable clamping end to limit the movement of the workpiece;

[0032] The horizontal clamping cylinder is used for driving and moving the horizontal movable clamping end;

[0033] The sliding power roller assembly is installed on the lower bracket of the turning mechanism bracket, and is used to transport the workpiece to be turned to the position and provide support and clamping for the workpiece to be turned.

[0034] Further, the upper power roller assembly includes: an upper fixed power roller motor, an upper fixed power roller, and an upper conveyor belt;

[0035] The upper fixed power roller motor drives the upper fixed power roller to rotate, thereby driving the upper conveyor belt to operate.

[0036] Furthermore, the lifting assembly is a lifting cylinder or a linear servo, which lifts the sliding power roller together with the workpiece to be flipped until the workpiece to be flipped contacts and clamps the upper fixed power roller.

[0037] Further, the pneumatic drive mechanism includes: a tilt cylinder, a speed reduction valve, a slip ring, a rack and pinion, a hydraulic buffer, a drive mechanism bracket, a rotating gear, and an electrical cabinet;

[0038] The rotating gear is connected to the flip mechanism bracket through the rotating shaft and is coaxial with the slewing support bearing, and is driven to rotate by the rack;

[0039] The rotating gear is connected to the flip cylinder through a rack and a gear, and is driven by the flip cylinder;

[0040] The deceleration valve is installed on the rotating shaft, and the hydraulic input end of the deceleration valve is connected to the hydraulic buffer. The hydraulic buffer relies on hydraulic damping and a clamping ring fixed on the rotating shaft to buffer and decelerate the rotation of the rotating shaft.

[0041] The slip ring is connected to the rotating shaft for supporting the rotating shaft, and the lower side of the slip ring is fixed on the driving mechanism bracket.

[0042] Furthermore, the photoelectric detection positioning mechanism includes: an inlet and outlet photoelectric sensor, which is installed at the initial position of the fixed inlet and outlet powered roller conveyor belt, and is used to detect the position of the workpiece that has completed the flipping and is sent out of the flipping mechanism to the inlet and outlet powered roller conveyor belt.

[0043] The sliding powered roller photoelectric sensor is installed at the end of the sliding powered roller conveyor belt and is used to detect the position of the workpiece to be flipped when it is sent to the sliding powered roller conveyor belt by the fixed feeding and discharging powered rollers.

[0044] The horizontal clamping direction photoelectric sensor is installed at the horizontal movable clamping end of the sliding power roller and is used to detect the position of the horizontal movable clamping end of the sliding power roller moving toward the workpiece until it contacts and clamps the workpiece.

[0045] The vertical photoelectric sensor is installed at the inner end of the upper fixed power roller to detect the position of the workpiece lifted on the sliding power roller until the workpiece contacts the upper fixed power roller.

[0046] An automatic flipping method for machining aviation structural parts is implemented based on the device, and the steps are as follows:

[0047] The workpiece is placed on the fixed feeding and discharging power roller mechanism and fed into the sliding power roller of the flipping mechanism. After the photoelectric sensor of the sliding power roller detects that it is in place, the horizontal movable clamping end moves toward the workpiece under the drive of the horizontal clamping cylinder. The photoelectric sensor in the horizontal clamping direction detects that the workpiece is in place, indicating that the workpiece has been clamped and fixed in the horizontal direction.

[0048] The lifting cylinder starts to move, lifting the sliding power roller until the upper surface of the workpiece contacts the upper fixed power roller. The vertical photoelectric sensor detects that the workpiece is in place and clamps the workpiece to fix it in the vertical direction.

[0049] Control the cylinder action of the pneumatic drive mechanism to achieve 180° flipping of the workpiece;

[0050] The sliding power roller located above the workpiece starts to move upward and leaves the workpiece, realizing the reset of the sliding power roller; the upper fixed power roller located below the workpiece starts to move, transferring the workpiece to the fixed feed and discharge power roller mechanism, and continues to drive the workpiece to move. When the feed and discharge photoelectric sensor detects that the workpiece has reached the feed position, the fixed feed and discharge power roller mechanism stops moving;

[0051] The flipping mechanism flips 180° in the opposite direction, and at the same time, the horizontal movable clamping end of the sliding power roller returns to the initial position, thus completing the flipping process.

[0052] The beneficial effects of this application are:

[0053] The present application provides an automatic flipping device for processing aviation structural parts. Different from general flipping machines, the flipping device provided by the present application comprehensively considers the characteristics of aviation structural parts such as high dimensional accuracy, large specification differences, and thin-walled structures. On the basis of ordinary flipping machines, a clamping and fixing device on the horizontal placement surface of the tooling and a clamping and fixing device in the vertical direction are added, and sponge pads are laid on the contact surfaces between all mechanisms and the workpiece to minimize the sliding of the workpiece during the flipping process and to absorb the vibration during the flipping process to the maximum extent, thereby achieving a stable and safe flipping process. The clamping device on the horizontal placement surface is divided into a fixed end and a movable end. The fixed clamping end serves as a reference for placing the workpiece, and the movable clamping end can adapt to workpieces of different sizes and specifications, so as to realize the processing and flipping of all workpieces in the flexible production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is the overall structure diagram of the automatic flipping device for machining aviation structural parts;

[0055] Figure 2 This is the structure diagram of the fixed feeding and discharging power roller of the automatic turning device for processing aviation structural parts;

[0056] Figure 3 This is a structural diagram of the turning mechanism of the automatic turning device for machining aviation structural parts;

[0057] Figure 4 This is the structure diagram of the pneumatic drive mechanism of the automatic turning device for machining aviation structural parts;

[0058] Figure 5 It is a schematic diagram of the control system of the automatic flipping device for machining aviation structural parts;

[0059] Among them: 1 fixed feeding and discharging power roller mechanism, 2 flip mechanism, 3 pneumatic drive mechanism, 4 chip and cutting fluid recovery device, 5 electrical cabinet and operation panel, 1.1 feeding and discharging power roller motor, 1.2 power roller, 1.3 driven roller, 1.4 sponge layer conveyor belt, 1.5 sponge layer roller, 1.6 photoelectric sensor, 1.7 bracket, 2.1 sliding power roller, 2.2 sliding power roller horizontal fixed clamping end, 2.3 sponge layer conveyor belt, 2.4 sliding power roller horizontal movable clamping end, 2.5 sponge layer roller, 2.6 lifting Cylinder, 2.7 Sliding power roller motor, 2.8 Horizontal clamping cylinder, 2.9 Horizontal clamping direction photoelectric sensor, 2.10 Sliding power roller photoelectric sensor, 2.11 Upper fixed power roller, 2.12 Vertical direction photoelectric sensor, 2.13 Upper fixed power roller motor, 2.14 Counterweight, 2.15 Turning mechanism bracket, 2.16 Slewing support bearing, 3.1 Cylinder, 3.2 Speed ​​reduction valve, 3.3 Slip ring, 3.4 Rack and pinion, 3.5 Hydraulic buffer, 3.6 Safety pin, 3.7 Drive mechanism bracket, 3.8 Electrical cabinet. DETAILED DESCRIPTION

[0060] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0061] The terms "first", "second", etc. in the specification and claims of the present invention are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0062] In a first aspect, the present application provides an automatic flipping device for machining aviation structural parts, the flipping device comprising:

[0063] The fixed in-and-out power roller is used to place the workpiece to be turned over and feed the raw material into the turning mechanism through the conveyor belt. The fixed in-and-out power roller includes: in-and-out power roller motor, power roller, driven roller, conveyor belt, roller, and bracket; the in-and-out power roller motor is installed on the bracket to drive the power roller; the conveyor belt is installed on the upper end of the bracket, and the two ends of the conveyor belt are respectively connected to the power roller and the driven roller, and the power roller rotates under the drive of the in-and-out power roller motor; the power roller drives the driven roller to rotate through the belt, and the power roller and the driven roller jointly drive the conveyor belt to move; the sponge layer rollers are installed on both sides of the sponge layer conveyor belt.

[0064] The flipping mechanism sends the workpiece to the designated position. Driven by the horizontal supporting cylinder, the movable clamping end slowly moves until it contacts the edge of the workpiece to clamp and fix the workpiece, limiting its sliding in the horizontal direction. Then, driven by the lifting cylinder, the sliding power roller on which the workpiece is placed is lifted to a certain height, contacts the upper fixed power roller and clamps the workpiece in the vertical direction. The power input of the pneumatic drive mechanism realizes a 180° flip of the workpiece. After the flipping is completed, the horizontal movable clamping end is reset, and the fixed power roller conveys the workpiece to the feeding position; the flipping mechanism performs the reset. The flipping mechanism includes: a sliding power roller assembly, a lifting assembly, an upper power roller assembly, and a flipping assembly; one end of the sliding power roller assembly is in contact with the fixed feed and discharge power roller and remains horizontal, and the sliding power roller assembly is used to receive the workpiece to be flipped and transmit it to the end and then clamp it perpendicular to the direction of movement; the lifting assembly is installed under the sliding power roller, and is used to lift the sliding power roller assembly so as to clamp the workpiece to be flipped in the vertical direction together with the upper power roller assembly; the flipping assembly includes: a slewing support bearing, a flipping mechanism bracket, and a ground bracket; the ground bracket is concave, one end of which is fixed with the outer ring of the slewing support bearing, and the other end is fixed with the pneumatic drive mechanism, and the ground bracket supports and stabilizes the flipping process of the flipping assembly; the flipping mechanism bracket is in a mouth shape, the left bracket is fixedly connected to the inner ring of the slewing support bearing, and the right bracket is fixedly connected to the output shaft of the pneumatic drive mechanism, and the flipping mechanism is driven by the pneumatic drive mechanism to drive the workpiece to be flipped to flip together.

[0065] The pneumatic drive mechanism receives the signal, the drive mechanism cylinder extends, drives the rack drive gear, and the rotating mechanism rotates 180 degrees, which is the power source for flipping. The pneumatic drive mechanism includes: flip cylinder, reduction valve, slip ring, rack and gear, hydraulic buffer, drive mechanism bracket, rotating gear, electrical cabinet; the rotating gear is connected to the flip mechanism bracket through the rotating shaft and is coaxial with the slewing support bearing; the rotating gear is connected to the flip cylinder through the rack and gear, and is driven by the flip cylinder; the reduction valve is installed on the rotating shaft, and the hydraulic input end of the reduction valve is connected to the hydraulic buffer. The hydraulic buffer relies on hydraulic damping and the clamping ring fixed on the rotating shaft to buffer and reduce the rotation of the rotating shaft; the slip ring is connected to the rotating shaft to support the rotating shaft.

[0066] The electric control mechanism, the entire material flipping action only needs to put the material in place, and after one-button start, the fixed feed and discharge power roller motor starts, and the feed and discharge power roller and the flip mechanism power roller feed the material into the flip mechanism. When the material reaches the flip mechanism feed limit trigger, the flip mechanism power roller motor automatically stops, extends the pneumatic lifting mechanism, lifts the workpiece, and after the workpiece is in place, starts the pneumatic drive mechanism to start flipping. After the flip in place signal is triggered, the lifting mechanism is retracted and started. After the lifting return signal is triggered, the material is sent out through the flip mechanism power roller and the feed and discharge power roller. After the fixed feed and discharge roller in place limit signal is triggered, the pneumatic drive mechanism rotates in the opposite direction. After the flip initial position signal is triggered, the entire flipping action is completed, and the flipping action completion indicator shows completion. The electric control mechanism includes an electrical cabinet and an operation panel, which are installed in front of the fixed feed and discharge power roller mechanism for easy control by operators.

[0067] Photoelectric detection positioning system, the workpiece is fed into the sliding power roller of the flipping mechanism. After being transmitted to the fixed position, the photoelectric switch detects the position and sends out a position signal, and the sliding power roller stops moving; after the sliding power roller is lifted to the fixed position, the photoelectric switch detects the position and sends out a position signal, the sliding power roller stops lifting, and the pneumatic drive mechanism starts to move; after the workpiece is flipped and transmitted to the fixed position of the feed power roller by the power roller, the photoelectric switch detects the position and sends out a position signal, and the feed power roller stops moving. The photoelectric detection positioning mechanism includes: an in-and-out material photoelectric sensor, a sliding power roller photoelectric sensor, a horizontal clamping direction photoelectric sensor and a vertical direction photoelectric sensor; one is installed at the initial position of the fixed in-and-out material power roller conveyor belt, and is used to detect the position of the workpiece that has completed the flipping and is sent out of the flipping mechanism to the in-and-out material power roller conveyor belt; the sliding power roller photoelectric sensor is installed at the end position of the sliding power roller conveyor belt, and is used to detect the position of the workpiece to be flipped from the fixed in-and-out material power roller to the sliding power roller conveyor belt; the horizontal clamping direction photoelectric sensor is installed at the horizontal movable clamping end of the sliding power roller, and is used to detect the position of the horizontal movable clamping end of the sliding power roller moving toward the workpiece until it contacts and clamps the workpiece; the vertical direction photoelectric sensor is installed at the inner end of the upper fixed power roller, and is used to detect the position of the workpiece lifted on the sliding power roller until the workpiece contacts the upper fixed power roller.

[0068] In addition, in order to reduce the small-distance displacement of the workpiece during the flipping process due to loose clamping, and the subsequent vibration that may cause quality risks and safety hazards to the workpiece, the sliding power roller, fixed power roller, horizontal fixed clamping end, and horizontal movable clamping end of the flipping mechanism are wrapped with sponge pads.

[0069] Preferably, the turning device further comprises: a turning device protective cover and a cutting fluid collection tank below, which are used to drain and collect cutting fluid and aluminum chips.

[0070] In a second aspect, the present application also provides an automatic flipping method for machining aviation structural parts, the flipping method comprising:

[0071] The workpiece is placed on the feed power roller and fed into a specific position on the sliding power roller of the flipping mechanism through the roller. After the photoelectric sensor detects that it is in place, the horizontal movable clamping end moves toward the workpiece under the drive of the horizontal clamping cylinder. The photoelectric sensor in the horizontal clamping direction detects the workpiece signal, indicating that the workpiece has been clamped and fixed in the horizontal direction. After that, under the control of the electronic control system, the lifting cylinder starts to move, lifting the sliding power roller to the upper surface of the workpiece and contacting the upper fixed power roller. The vertical photoelectric sensor detects that the workpiece is in place, clamps the workpiece, and fixes the workpiece in the vertical direction. At this point, the workpiece has completed the fixed clamping before flipping, and the electronic control system sends a signal to control the cylinder of the pneumatic drive mechanism to drive the rack to start moving, realizing a 180° flip of the workpiece. After the rack action stops at the limit position, the sliding power roller located above the workpiece starts to move upward and leaves the workpiece, realizing the reset of the sliding power roller; the upper fixed power roller located below the workpiece starts to move, and transmits the workpiece to the feed and discharge power roller conveyor belt through the conveyor belt, and continues to drive the workpiece to move. When the photoelectric sensor detects that the workpiece has reached the feeding position, the feed and discharge power roller stops moving; the flipping mechanism part flips back 180°, and the horizontal movable clamping end of the sliding power roller also returns to the initial position, thus completing the flipping process.

[0072] The details are as follows:

[0073] The operator controls the elevator to place the workpiece on the sponge layer conveyor belt 1.4 of the fixed inlet and outlet power roller 1, close to the left reference edge sponge layer roller 1.5, and presses the operation button on the electrical cabinet operation panel 5, the inlet and outlet power roller mechanism 1 starts to operate, the inlet and outlet power roller reduction motor 1.1 rotates to drive the power roller to rotate, and drives the driven roller 1.3 to rotate through the sponge layer conveyor belt 1.4, and transports the workpiece from the initial feeding position to the sponge layer conveyor belt 2.3 of the sliding power roller 2.1 of the flipping mechanism.

[0074] Under the control of the electronic control system, the sliding power roller motor 2.7 starts accordingly, and the workpiece continues to be conveyed through the sponge layer conveyor belt 2.3 until the workpiece reaches the position of the sliding power roller photoelectric sensor 2.10. The sensor detects the in-position signal and feeds back to the electronic control system. The electronic control system sends a signal to control the fixed power roller motor 1.1 for feeding and discharging and the sliding power roller motor 2.7 of the flipping mechanism to stop rotating, and the workpiece stops at the sliding power roller photoelectric sensor 2.10, indicating that the workpiece has reached the position to be flipped on the conveyor belt.

[0075] The electronic control system sends a signal to control the horizontal clamping cylinder 2.8 under the sliding power roller 2.1 to advance, and the horizontal movable clamping end 2.4 slowly approaches the workpiece under the action of the cylinder 2.8 until the sponge layer roller 2.5 is close to the workpiece, and the horizontal clamping direction photoelectric sensor 2.9 detects that it has contacted the workpiece and sends a signal of arrival, and the horizontal clamping cylinder 2.8 stops advancing and maintains pressure. After the workpiece is clamped and fixed in the horizontal direction, the electronic control system sends a signal to control the lifting cylinder 2.6 to advance, and the sliding power roller 2.1 is lifted upward together with the workpiece until the vertical direction photoelectric sensor 2.12 on the upper fixed power roller 2.11 detects the upper surface of the workpiece. At this time, the upper surface of the workpiece and the upper fixed power roller 2.11 are clamped and fixed in the vertical direction. The vertical direction photoelectric sensor 2.12 sends a signal, and the electronic control system controls the lifting cylinder 2.6 to maintain pressure. At this point, the workpiece has completed the fixed clamping in the horizontal and vertical directions. During the clamping and fixing process in the horizontal and vertical directions, the sponge-covered conveyor belt 2.3 and the sponge-covered roller 2.5 are always in contact with the workpiece, which can effectively absorb vibration and protect the workpiece during the turning process.

[0076] The electric control system sends a rotation signal, and the drive mechanism cylinder 3.1 extends, driving the rack and gear 3.4 to move, driving the rotating mechanism in the flip mechanism 2 to rotate 180 degrees. The rotating mechanism includes a sliding power roller 2.1, a lifting cylinder 2.6, a sliding power roller motor 2.7, a horizontal clamping cylinder 2.8, a horizontal clamping direction photoelectric sensor 2.9, a sliding power roller photoelectric sensor 2.10, an upper fixed power roller 2.11, a vertical direction photoelectric sensor 2.12 and a counterweight 2.14, etc. The accessories contained in the above-mentioned rotating mechanism are turned over as a whole under the guidance of the slewing support bearing 2.16. During the flipping process, the sponge roller 2.5 and the sponge conveyor belt 2.3 on the side of the power roller bear the weight of the workpiece, and the speed reduction valve 3.2 and the hydraulic buffer 3.5 ensure that the rotating mechanism is stable in place. After the rotating mechanism rotates to the limit, the solenoid valve of the drive mechanism controls the cylinder to lock and maintain pressure, and the center of gravity of the entire flipping mechanism is close to the rotating axis. The counterweight 2.14 is used to adjust the center of gravity of the flipping mechanism to achieve a smooth flipping process.

[0077] After the flipping is completed, the electronic control system sends a signal to control the lifting cylinder 2.6 to start shrinking. At this time, the sliding power roller 2.1 located above the workpiece rises upward and leaves the workpiece. After the sliding power roller 2.1 returns to the initial position in the vertical direction, the fixed power roller motor 2.13 starts to run in the reverse direction. The conveyor belt of the fixed power roller 2.11 conveys the workpiece to the fixed feed and discharge power roller 1. The workpiece continues to be conveyed until the photoelectric sensor 1.6 on the feed and discharge power roller 1 detects that the workpiece is approaching, and the feed and discharge power roller motor 1.1 stops running, and the feed and discharge power roller 1 stops.

[0078] When the workpiece that has completed flipping is sent back to the initial position, the electronic control system sends a signal, the flipping mechanism 2 performs a reset operation, the cylinder 3.1 is retracted, driving the rack and gear 3.4 to move, the rotating mechanism rotates in the opposite direction as a whole, the sliding power roller 2.1 rotates 180° in the opposite direction and returns to the bottom of the upper fixed power roller 2.11, and at the same time the horizontal clamping cylinder 2.8 is retracted, the horizontal movable clamping end 2.4 of the sliding power roller moves away from the horizontal fixed clamping end 2.2 of the sliding power roller and resets, and the flipping mechanism 2 waits for the next flip.

[0079] During the entire turning process, the cutting fluid attached to the workpiece flows into the recovery device 4 through the drainage groove.

[0080] After the above process is completed, the indicator light 5 of the operation panel lights up green, indicating that the flipping operation has been completed and the workpiece can be taken out. The whole flipping process lasts for 2 minutes. The operator lifts the workpiece to the feeding and unloading power roller 1, presses the start button of the operation panel, and waits for 2 minutes to complete the flipping of the workpiece. The whole process can be realized by one person.

[0081] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present invention is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0082] Through the description of the above implementation modes, those skilled in the art can clearly understand that the above implementation modes can be implemented by means of software plus a necessary general hardware platform, and of course by means of hardware, but in many cases the former is a better implementation mode. The above describes the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above specific implementation modes, which are merely illustrative and not restrictive. Under the enlightenment of the present invention, those skilled in the art can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. An automatic turning device for machining aviation structural parts, characterized in that: The device includes: Fixed feeding and discharging power rollers are used to feed the workpiece to be flipped into the flipping mechanism, or to send out the flipped workpiece; The turning mechanism is used to receive the workpiece to be turned over, turn it over after clamping, and send it out; A pneumatic driving mechanism, used for driving the turning mechanism to turn over; Photoelectric detection positioning mechanism, used to detect the movement position of the workpiece to be flipped or whether it has moved into position; The electric control mechanism is used to control the operation of the flip mechanism and the pneumatic drive mechanism according to the detection signal of the photoelectric detection positioning system.

2. The device according to claim 1, characterized in that: Fixed inlet and outlet power rollers include: Inlet and outlet power roller motor, power roller, driven roller, conveyor belt, roller, bracket; A conveyor belt is installed on the upper end of the bracket, and the two ends of the conveyor belt are respectively connected to a power roller and a driven roller; The motor of the power roller for feeding and discharging materials is installed on the bracket to drive the power roller; Rollers are installed on both sides of the transmission belt.

3. The device according to claim 2, characterized in that: The turning mechanism includes: a sliding power roller assembly, a lifting assembly, an upper power roller assembly, and a turning assembly; One end of the sliding power roller assembly is in contact with the fixed feeding and discharging power roller and is kept horizontal. The sliding power roller assembly is used to receive the workpiece to be turned over and transfer it to the end and then clamp it perpendicular to the moving direction; The lifting assembly is used to lift up the sliding power roller assembly so as to clamp the assembly to be flipped in the vertical direction together with the upper power roller assembly; The flip assembly is driven by the pneumatic drive mechanism to drive the sliding power roller assembly and the upper power roller assembly and the workpiece to be flipped therein; After flipping, the upper power roller assembly sends the flipped workpiece to the fixed feeding and discharging power roller.

4. The device according to claim 3, characterized in that: The flip assembly includes: Slewing support bearing, tilting mechanism bracket, ground bracket; The ground bracket is concave in shape, with the outer ring of the slewing support bearing fixed at one end and the pneumatic drive mechanism fixed at the other end; The tilting mechanism bracket is in a U-shape, the left bracket is fixedly connected to the inner ring of the slewing support bearing, and the right bracket is fixedly connected to the output shaft of the pneumatic drive mechanism.

5. The device according to claim 4, characterized in that: The sliding power roller assembly includes: a sliding power roller, a horizontal fixed clamping end, a lower conveyor belt, a horizontal clamping cylinder, a horizontal movable clamping end, a roller, and a sliding power roller motor; The sliding power roller motor drives the sliding power roller to rotate, thereby driving the lower conveyor belt to rotate; The horizontal fixed clamping end and the horizontal movable clamping end are respectively arranged on both sides of the lower conveyor belt perpendicular to the moving direction, and are used to clamp the workpiece to be turned over; A limit plate is provided at the end of the horizontal fixed clamping end and is connected to the horizontal movable clamping end to limit the movement of the workpiece; The horizontal clamping cylinder is used for driving and moving the horizontal movable clamping end; The sliding power roller assembly is installed on the lower bracket of the turning mechanism bracket.

6. The device according to claim 5, characterized in that: The upper power roller assembly includes: an upper fixed power roller motor, an upper fixed power roller, and an upper conveyor belt; The upper fixed power roller motor drives the upper fixed power roller to rotate, thereby driving the upper conveyor belt to operate.

7. The device according to claim 6, characterized in that: The lifting component is a lifting cylinder or a linear servo.

8. The device according to claim 7, characterized in that: The pneumatic drive mechanism includes: a tilt cylinder, a speed reduction valve, a slip ring, a rack and pinion, a hydraulic buffer, a drive mechanism bracket, a rotating gear, and an electrical cabinet; The rotating gear is connected to the flip mechanism bracket through the rotating shaft and is coaxial with the slewing support bearing; The rotating gear is connected to the flip cylinder through a rack and a gear, and is driven by the flip cylinder; The deceleration valve is installed on the rotating shaft, and the hydraulic input end of the deceleration valve is connected to the hydraulic buffer. The hydraulic buffer relies on hydraulic damping and a clamping ring fixed on the rotating shaft to buffer and decelerate the rotation of the rotating shaft. The slip ring is connected to the rotating shaft to support the rotating shaft.

9. The device according to claim 7, characterized in that: The photoelectric detection positioning mechanism includes: an in-and-out photoelectric sensor, which is installed at the initial position of the fixed in-and-out powered roller conveyor belt and is used to detect the position of the workpiece that has completed the flipping and is sent out of the flipping mechanism to the in-and-out powered roller conveyor belt. The sliding powered roller photoelectric sensor is installed at the end of the sliding powered roller conveyor belt and is used to detect the position of the workpiece to be flipped when it is sent to the sliding powered roller conveyor belt by the fixed feeding and discharging powered rollers. The horizontal clamping direction photoelectric sensor is installed at the horizontal movable clamping end of the sliding power roller and is used to detect the position of the horizontal movable clamping end of the sliding power roller moving toward the workpiece until it contacts and clamps the workpiece. The vertical photoelectric sensor is installed at the inner end of the upper fixed power roller to detect the position of the workpiece lifted on the sliding power roller until the workpiece contacts the upper fixed power roller.

10. An automatic flipping method for machining aviation structural parts, implemented based on any of the above-mentioned devices, characterized in that: Here are the steps: The workpiece is placed on the fixed feeding and discharging power roller mechanism and fed into the sliding power roller of the flipping mechanism. After the photoelectric sensor of the sliding power roller detects that it is in place, the horizontal movable clamping end moves toward the workpiece under the drive of the horizontal clamping cylinder. The photoelectric sensor in the horizontal clamping direction detects that the workpiece is in place, indicating that the workpiece has been clamped and fixed in the horizontal direction. The lifting cylinder starts to move, lifting the sliding power roller until the upper surface of the workpiece contacts the upper fixed power roller. The vertical photoelectric sensor detects that the workpiece is in place and clamps the workpiece to fix it in the vertical direction. Control the cylinder action of the pneumatic drive mechanism to achieve 180° flipping of the workpiece; The sliding power roller located above the workpiece starts to move upward and leaves the workpiece, thereby resetting the sliding power roller; The upper fixed power roller located below the workpiece starts to move, transferring the workpiece to the fixed feed and discharge power roller mechanism, and continues to drive the workpiece to move. When the feed and discharge photoelectric sensor detects that the workpiece has reached the feed position, the fixed feed and discharge power roller mechanism stops moving; The flipping mechanism flips 180° in the opposite direction, and at the same time, the horizontal movable clamping end of the sliding power roller returns to the initial position, thus completing the flipping process.

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