Aircraft engine hood welding device and machining method thereof

Abstract

The invention relates to the technical field of aircraft machining, and discloses an aircraft engine hood welding device and a machining method thereof.The aircraft engine hood welding device is characterized in that a turnover type pedestal mounting structure is adopted and matched with a conveying pedestal moving on the upper portion of a turnover support, feeding and discharging mounting of an engine hood workpiece can be conveniently and rapidly completed, and an inner side expansion supporting type workpiece positioning structure is adopted; a cylinder body of a hood and a headstock part can be clamped and supported from the inside, clamping and positioning are rapid and accurate, positioning and butt joint of the cylinder body of the hood and the headstock part can be rapidly and conveniently completed in cooperation with lifting adjustment of the upper positioning cylinder seat, and the welding positioning efficiency and the welding precision of the device are improved advantageously; in the adjusting and positioning stage, the inner side of the hood is supported in a rolling mode through the supporting guide wheel, clamping, positioning and adjusting of the hood structure can be effectively facilitated, the supporting guide wheel moves backwards and retracts after positioning and adjusting, and the hood is supported and limited through the edge of the inner supporting clamping base; and the clamping and positioning precision of the hood can be effectively improved while the hood workpiece is conveniently positioned and adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft processing, and specifically to a welding device for an aircraft engine cover and its processing method. Background Technique

[0002] With the development of science and technology, the products of aircraft and aero-engines are constantly updated, their structural designs are becoming more and more complex, the manufacturing accuracy is higher, and higher requirements are put forward for manufacturing technology. In recent years, due to the development of laser equipment and technology, the share of laser welding in the field of aviation manufacturing has been continuously expanding. As a working protection structure of the power structure of an aircraft, the engine cover is installed outside the aircraft engine to play a role in shielding and protecting the engine, and is an important working component of the aircraft.

[0003] In terms of structure, the aircraft engine cover is arranged as a cylindrical cover structure, which is mainly composed of a cylindrical ring part and a head seat part. Due to the cylindrical seat structure, a vertical positioning and clamping installation method is mostly used during welding. Due to the high clamping and positioning difficulty of the cylindrical structure of the engine cover, and it is difficult to ensure the clamping and docking accuracy. Moreover, due to the relatively large axial volume of the engine cover, the installation and unloading work is very inconvenient. Therefore, a welding device for an aircraft engine cover and its processing method are proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a welding device for an aircraft engine cover and its processing method to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A welding device for an aircraft engine cover, including a clamping mechanism, a welding mechanism, and a loading mechanism; The clamping mechanism is used for the clamping and installation of the engine cover workpiece. The clamping mechanism includes a bottom bracket, a flipping support, a flipping drive motor, a supporting turntable, a rotating drive motor, a lower positioning cylinder seat, an upper positioning cylinder seat, a lifting drive cylinder, a lower clamp seat drive motor, an upper clamp seat drive motor, an inner support clamp seat, and a supporting guide wheel. The flipping support is driven by the flipping drive motor to be flip-mounted on the upper part of the bottom bracket. The supporting turntable is driven by the flipping drive motor to be rotatably mounted on the upper part of the flipping support. The lower positioning cylinder seat is installed on the upper part of the supporting turntable. The upper positioning cylinder seat is driven by the lifting drive cylinder to be movably and vertically installed on the upper part of the lower positioning cylinder seat. The inner support clamp seat is driven by the lower clamp seat drive motor and the upper clamp seat drive motor to be respectively installed on the outer peripheral sides of the lower positioning cylinder seat and the upper positioning cylinder seat. The supporting guide wheel is retractably installed on the edge of the inner support clamp seat; The welding mechanism is used for welding the hood workpiece, and comprises a welding support, a transverse drive motor, a vertical drive motor and a laser welding head. The welding support is driven by the transverse drive motor to be movable and installed on the side of the bottom bracket, and the laser welding head is driven by the vertical drive motor to be movable and lifted and installed on the side of the welding support; The loading mechanism is used for supporting the loading and transfer of the engine hood, and the loading mechanism includes a transport platform, a lifting plate seat, a plate seat driving cylinder and a supporting roller column. The transport platform is horizontally movably installed on the upper part of the bottom bracket, and the supporting roller column follows the lifting plate seat and is driven by the plate seat driving cylinder to be movably lifted and lowered and installed on the upper part of the transport platform.

[0006] Preferably, the flip support is installed on the upper rear side of the bottom bracket through double-sided rotating shafts to support the fixed axis flipping, the flip drive motor is fixedly installed on the side of the bottom bracket, a driving gear is fixedly installed on the rotating shaft end of the flip drive motor, a semicircular gear seat is provided on the edge of the flip support, and the driving gear is meshed with the tooth groove portion of the semicircular gear seat.

[0007] Preferably, the above-mentioned support turntable is fixedly rotatably installed on the upper part of the flip support, the rotation drive motor is fixedly installed on the rear part of the flip support, and a transmission gear is fixedly installed on the shaft end of the rotation drive motor, and the transmission gear is meshed with the tooth groove part of the lower part of the support turntable.

[0008] Preferably, the above-mentioned lower positioning cylinder seat is fixedly installed on the upper part of the supporting turntable, and the lower part of the upper positioning cylinder seat is evenly and circularly fixed with lifting guide columns, the lower part of the lifting guide columns is movably plugged into the socket part on the upper part of the upper positioning cylinder seat, and the lifting drive cylinder is fixedly installed on the inner side of the cavity in the middle part of the lower positioning cylinder seat, and the lower part of the upper positioning cylinder seat is fixedly connected to the push rod end of the lifting drive cylinder.

[0009] Preferably, the lower positioning cylinder seat and the upper positioning cylinder seat are both provided with a driving disc seat and a driving support arm, and the two groups of driving disc seats are respectively rotatably installed inside the lower positioning cylinder seat and the upper positioning cylinder seat, and the lower clamp seat driving motor and the upper clamp seat driving motor are respectively installed with the two groups of driving disc seats through rotating shafts.

[0010] Preferably, the above-mentioned driving support arms are provided in plurality, and several of the driving support arms are evenly distributed in a circular shape. The driving support arms are slidably engaged with guide grooves provided on the sides of the lower positioning cylinder seat and the upper positioning cylinder seat. An arc-shaped tooth seat is provided at the end of the driving support arm, and the arc-shaped tooth seat is slidably engaged with the spiral groove provided on the upper part of the driving disc seat.

[0011] Preferably, the end of the inner support clamp seat is fixedly installed with the end of the driving support arm through notch fitting and bolt fastening. The support guide wheels are arranged in pairs. Inside the installation notches provided at both ends of the inner support clamp seat, guide wheel connection blocks are respectively slidably fitted and installed. The support guide wheels are rotatably installed on the upper part of the guide wheel connection blocks through shaft supports. Springs are installed between the guide wheel connection blocks and the installation sides of the installation notches in a contacting manner. On both sides of the middle part of the guide wheel connection blocks, limit bolt columns are installed through holes. The lower ends of the limit bolt columns are slidably fitted and installed in the limit guide grooves provided in the installation notches. A clamping support pad is fixedly installed in the middle of the outer side of the inner support clamp seat.

[0012] Preferably, a horizontal rail seat is provided at the rear edge of the bottom bracket. The lower part of the welding support is slidably fitted and supported with the rail seat part on the upper part of the horizontal rail seat. The horizontal driving motor is fixedly installed on the side of the horizontal rail seat. A driving lead screw is installed at the shaft end of the horizontal driving motor. The driving lead screw is threadedly installed with the threaded hole part at the lower part of the welding support. A vertical rail seat is fixedly installed on the inner side of the welding support. The rear support part of the laser welding head is slidably fitted and installed with the rail seat part of the vertical rail seat. The vertical driving motor is fixedly installed on the upper part of the welding support. A transmission lead screw is installed at the shaft end of the vertical driving motor. The transmission lead screw is threadedly installed with the threaded hole part of the support part of the laser welding head.

[0013] Preferably, support rail wheels are installed at the lower part of the transportation pedestal through shaft supports. The support rail wheels are rollingly supported with the track part at the front of the bottom bracket. A lifting guide post is fixedly installed on the upper part of the lifting plate seat. The lifting plate seat is slidably fitted and installed inside the lifting slot seat provided on the upper part of the transportation pedestal through the lifting guide post. A plurality of plate seat driving cylinders are provided. The plate seat driving cylinders are fixedly installed at the lower part of the transportation pedestal. The push rod ends of the plate seat driving cylinders are fixedly installed with the lower part of the lifting plate seat. Two groups of support roller columns are rotatably installed on the upper parts of two groups of lifting guide posts through shaft supports.

[0014] The present invention also provides a processing method for a welding device of an aircraft engine cover, including the following steps: S1. Loading and positioning: Before processing, the cylindrical ring part and the head seat part of the hood workpiece are supported and installed on the upper part of the support roller column above the transportation pedestal. Then, the device is switched to the loading mode. The support turntable is driven by the rotary drive motor to turn downward by 90 degrees, so that the lower positioning cylinder seat and the upper positioning cylinder seat are in a horizontal state. Then, the lifting plate seat is driven by the plate seat drive cylinder to adjust the support height of the hood workpiece so that the hood workpiece is coaxial with the positioning cylinder seat. Then, the hood workpiece is installed on the upper part of the positioning cylinder seat in a sleeved manner by pushing. Then, the inner support clamp seat is driven to expand by the lower clamp seat drive motor and the upper clamp seat drive motor, and the inner side of the hood workpiece is pre-supported and limited by the support guide wheel. Then, the position of the hood workpiece is adjusted by lifting, and then the inner side of the hood workpiece is limited and supported by the inner support clamp seat through outward expansion, completing the loading and positioning of the hood workpiece; S2. Inverted loading: After completing the loading and positioning, the support turntable is driven by the rotary drive motor to turn upward by 90 degrees, so that the lower positioning cylinder seat and the upper positioning cylinder seat are in a vertical state, completing the inverted loading work of the hood workpiece; S3. Positioning and welding: After loading, the upper positioning cylinder seat is driven to move downward by the lifting drive cylinder so that the cylindrical ring part and the head seat part of the hood workpiece are close to each other for butt joint. The position of the head seat part of the hood workpiece is adjusted and corrected for the second time by observing the interface and retracting the upper positioning cylinder seat. After completion, the adjusted head seat part of the hood workpiece is limited and fixed by the inner support clamping, and the welding sides of the cylindrical ring part and the head seat part of the hood workpiece are closely contacted by the lowering of the lifting drive cylinder. Then, the laser welding head is driven to move by the cooperation of the transverse drive motor and the vertical drive motor so that the laser welding head is located on the welding side of the hood workpiece. Then, the support turntable is driven by the rotary drive motor to drive the hood workpiece to rotate axially. During the process, the butt joint welding work of the cylindrical ring part and the head seat part of the hood workpiece is completed by the laser welding head; S4. Inverted unloading: After welding, the support turntable is driven by the rotary drive motor to turn downward by 90 degrees, so that the lower positioning cylinder seat and the upper positioning cylinder seat are in a horizontal state. Then, the transportation pedestal is pushed to the lower part of the hood workpiece. Then, the lifting plate seat is driven to lift by the plate seat drive cylinder so that the support roller column supports the lower part of the hood workpiece. Then, the inner support clamp seats on the sides of the lower positioning cylinder seat and the upper positioning cylinder seat retract, so that the released hood workpiece is supported on the upper part of the transportation pedestal. Then, the hood workpiece is pushed out of the processing area, completing the unloading work of the hood workpiece.

[0015] Compared with the prior art, the present invention adopts the above technical solutions and has the following technical effects: 1. This welding device adopts a flip-type pedestal installation structure, and uses the flip support as the clamping support structure of the workpiece. The flip drive motor drives the flip support to switch between vertical and horizontal support states. The transport pedestal moving on the upper part of the flip support can quickly and easily complete the loading and unloading installation of the hood workpiece, greatly improving the loading and unloading installation convenience of the device.

[0016] 2. An inner expansion support workpiece positioning structure is adopted. The upper positioning cylinder seat is coaxially driven by the lifting drive cylinder and can be lifted and lowered on the upper part of the lower positioning cylinder seat. With the inner support clamp seat driven by the seat drive motor, the cylinder body and the head seat of the hood can be clamped and supported from the inside. The clamping and positioning are fast and accurate. In addition, the lifting and lowering adjustment of the upper positioning cylinder seat can quickly and conveniently complete the positioning and docking of the hood cylinder body and the head seat, which is beneficial to improve the welding positioning efficiency and welding accuracy of the device.

[0017] 3. The inner support clamp adopts a stepped support working method and uses an elastic sliding structure to connect and install the support guide wheel. In the adjustment and positioning stage, the inner side of the hood is rolled supported by the support guide wheel, which can effectively facilitate the clamping, positioning and adjustment of the hood structure. After the positioning adjustment and correction, the support guide wheel is moved backward and retracted by constant pressure, and the hood is supported and limited by the edge of the inner support clamp. The dual structure can effectively improve the clamping and positioning accuracy of the hood while facilitating the positioning and adjustment of the hood workpiece, which is beneficial to the improvement of the hood welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the front side stereoscopic structure of the overall working installation of the present invention; Figure 2 It is a schematic diagram of the rear three-dimensional structure of the overall working installation of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the clamping mechanism of the present invention; Figure 4 It is a schematic diagram of the working installation structure of the lower positioning cylinder seat and the upper positioning cylinder seat of the present invention; Figure 5 It is a schematic diagram of the inner support clamp seat driving installation structure of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the structure of the middle A area; Figure 7 Schematic diagram of the working and installation structure of the welding mechanism of the present invention; Figure 8 Schematic three-dimensional structure diagram of the loading mechanism of the present invention.

[0020] Description of reference numerals: 1, bottom bracket; 2, flipping support; 3, flipping drive motor; 4, support turntable; 5, rotation drive motor; 6, lower positioning cylinder base; 7, upper positioning cylinder base; 8, lifting drive cylinder; 9, lower clamp seat drive motor; 10, upper clamp seat drive motor; 11, inner support clamp seat; 12, support guide wheel; 13, drive disc base; 14, drive support arm; 15, lifting guide post; 16, guide wheel connection block; 17, spring; 18, limit bolt post; 19, clamping support pad; 20, welding support; 21, lateral drive motor; 22, vertical drive motor; 23, laser welding head; 24, transport pedestal; 25, lifting plate base; 26, plate base drive cylinder; 27, support roller column. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions that can be implemented in this application. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size should still fall within the scope that can be covered by the technical content disclosed in this application without affecting the effects that this application can produce and the purposes that can be achieved.

[0023] Please refer to Figures 1 - 8 , the present invention provides a technical solution: a welding device for an aircraft engine cover, including a clamping mechanism, a welding mechanism, and a loading mechanism. Specifically: The clamping mechanism is used for clamping and installing the engine cover workpiece. The clamping mechanism includes a bottom bracket 1, a flipping support 2, a flipping drive motor 3, a support turntable 4, a rotation drive motor 5, a lower positioning cylinder base 6, an upper positioning cylinder base 7, a lifting drive cylinder 8, a lower clamp seat drive motor 9, an upper clamp seat drive motor 10, an inner support clamp seat 11, and a support guide wheel 12. The flipping support 2 is driven by the flipping drive motor 3 to be flip-mounted on the upper part of the bottom bracket 1. Specifically, as shown in the attached Figure 3As shown in the figure, the tipping support 2 is pivotally mounted on the upper rear side of the bottom support 1 through bilateral rotating shafts. The tipping drive motor 3 is a reduction motor, which is fixedly mounted on the side of the bottom support 1. The rotating shaft end of the reducer of the tipping drive motor 3 is fixedly mounted with a driving gear. A semi-circular tooth seat is arranged at the edge of the tipping support 2, and the driving gear is meshed and installed with the tooth groove part of the semi-circular tooth seat. Adopting a tipping type pedestal mounting structure, the tipping support 2 is used as a clamping and supporting structure for the workpiece, and the tipping support 2 can be driven by the operation of the tipping drive motor 3 to switch the actions between the vertical and horizontal support states.

[0024] The supporting turntable 4 is rotationally mounted on the upper part of the tipping support 2 by being driven by the tipping drive motor 3. Specifically, as shown in the appendix Figure 3 As shown in the figure, the supporting turntable 4 is fixedly rotationally mounted on the upper part of the tipping support 2. The rotary drive motor 5 is a reduction motor, which is fixedly mounted on the rear part of the tipping support 2. The rotating shaft end of the reducer of the rotary drive motor 5 is fixedly mounted with a transmission gear, and the transmission gear is meshed and installed with the tooth groove part at the lower part of the supporting turntable 4. The rotation of the upper turntable part of the supporting turntable 4 can be driven through meshing transmission. The lower positioning cylinder seat 6 is fixedly mounted on the upper part of the supporting turntable 4. The upper positioning cylinder seat 7 is movably and vertically mounted on the upper part of the lower positioning cylinder seat 6 by being driven by a lifting drive cylinder 8. Specifically, as shown in the appendix Figure 4 As shown in the figure, in order to realize the lifting and guiding of the upper positioning cylinder seat 7, lifting guide columns 15 are uniformly and fixedly mounted in a circumferential shape on the lower part of the upper positioning cylinder seat 7. The lower parts of the lifting guide columns 15 are movably inserted and installed in the jacking parts on the upper part of the upper positioning cylinder seat 7. The lifting drive cylinder 8 is a servo electric cylinder, which is fixedly mounted on the inner side of the cavity in the middle of the lower positioning cylinder seat 6. The lower part of the upper positioning cylinder seat 7 is fixedly connected with the push rod end of the lifting drive cylinder 8. The vertical lifting displacement of the upper positioning cylinder seat 7 can be driven by the lifting drive cylinder 8.

[0025] The inner support clamp seat 11 is respectively mounted on the outer peripheral sides of the lower positioning cylinder seat 6 and the upper positioning cylinder seat 7 by being driven by a lower clamp drive motor 9 and an upper clamp drive motor 10. Specifically, as shown in the appendix Figure 5As shown, in order to realize working drive, a driving disc seat 13 and a driving support arm 14 are arranged inside the lower positioning cylinder seat 6 and the upper positioning cylinder seat 7. The two groups of driving disc seats 13 are rotatably installed inside the lower positioning cylinder seat 6 and the upper positioning cylinder seat 7 respectively. The lower clamp seat driving motor 9 and the upper clamp seat driving motor 10 are respectively installed with the two groups of driving disc seats 13 through the rotating shaft, and are respectively used for rotating working drive of the two groups of driving disc seats 13. A plurality of driving support arms 14 are arranged, and four driving support arms 14 are evenly distributed in a circular shape. The driving support arms 14 are slidably engaged with the guide slots arranged on the sides of the lower positioning cylinder seat 6 and the upper positioning cylinder seat 7, and can perform telescopic sliding movement in the direction of the slots. In order to realize telescopic drive The driving arm 14 is movable, and an arc-shaped tooth seat is arranged at the end thereof. The arc-shaped tooth seat is slidably fitted with the spiral groove arranged on the upper part of the driving disc seat 13 to form a four-claw chuck-like working driving structure, and an inner expansion support type workpiece positioning structure is adopted. The upper positioning cylinder seat 7 is driven by the lifting driving cylinder 8 and is coaxially liftably installed on the upper part of the lower positioning cylinder seat 6. In conjunction with the inner support clamp seat 11 driven by the seat driving motor, the cylinder body and the head seat part of the machine cover can be clamped and supported from the inside, and the clamping and positioning are fast and accurate. In addition, the lifting and lowering adjustment of the upper positioning cylinder seat 7 can quickly and conveniently complete the positioning and docking of the cylinder body of the machine cover and the head seat part, which is beneficial to improving the welding positioning efficiency and welding accuracy of the device.

[0026] The inner support clamp 11 is used for clamping and supporting the hood workpiece, as shown in the attached Figure 5 As shown, the end of the inner support clamp 11 is fixedly installed with the end of the driving support arm 14 by means of a notch-fitting bolt fastening, and the support guide wheel 12 is used for positioning and adjusting the hood workpiece. Figure 6As shown, the support guide wheels 12 are arranged in pairs, and the inner sides of the installation grooves arranged at both ends of the inner support clamp seat 11 are respectively slidably fitted with guide wheel connecting blocks 16, and the support guide wheel 12 is rotatably installed on the upper part of the guide wheel connecting block 16 through the rotating shaft support. In order to provide elastic supporting force, a spring 17 is installed on the installation side of the guide wheel connecting block 16 and the installation groove. The middle of the guide wheel connecting block 16 is penetrated and installed on both sides. The lower end of the limit bolt column 18 is slidably fitted in the limit guide groove arranged in the installation groove. The working limit of the extension stroke of the support guide wheel 12 can be achieved through the fitting and clamping limit of the limit bolt column 18 and the limit guide groove. The inner support clamp seat 11 A stepped support working method is adopted, and the support guide wheel 12 is connected and installed by using an elastic sliding structure. In the adjustment and positioning stage, the support guide wheel 12 is used to provide rolling support for the inner side of the hood, which can effectively facilitate the clamping, positioning and adjustment of the hood structure. After the positioning adjustment and correction, the support guide wheel 12 is moved backward and retracted by constant pressure, and the hood is supported and limited by the edge of the inner support clamp 11. The dual structure can effectively improve the clamping and positioning accuracy of the hood while facilitating the positioning and adjustment of the hood workpiece, which is beneficial to the improvement of the hood welding quality. In order to improve the clamping and support stability of the inner support clamp 11 and the hood workpiece, a clamping pad 19 is fixedly installed on the middle part of the outer side of the inner support clamp 11.

[0027] The loading mechanism is used for loading and transferring support of the engine hood. The loading mechanism includes a transport platform 24, a lifting plate seat 25, a plate seat driving cylinder 26 and a supporting roller column 27. The transport platform 24 is horizontally movably installed on the upper part of the bottom bracket 1. Specifically, as shown in the attached Figure 7 As shown, the lower part of the transport platform 24 is supported by a rotating shaft and a supporting rail wheel is installed, and the supporting rail wheel is installed with the track part of the front part of the bottom bracket 1 in a rolling support manner. The supporting roller column 27 follows the lifting plate seat 25 and is driven by the plate seat driving cylinder 26 to move up and down and is installed on the upper part of the transport platform 24. Specifically, as shown in the attached Figure 8 As shown, a lifting guide column is fixedly installed on the upper part of the lifting plate seat 25, and the lifting plate seat 25 is movably mounted in the lifting groove seat arranged on the upper part of the transport platform 24 through the support of the lifting guide column. The plate seat driving cylinder 26 is a servo electric cylinder. Two plate seat driving cylinders 26 are provided. The two groups of plate seat driving cylinders 26 are respectively fixedly installed on both sides of the lower part of the transport platform 24. The push rod ends of the plate seat driving cylinders 26 are fixedly installed on the lower part of the lifting plate seat 25. The lifting and lowering displacement drive of the lifting plate seat 25 can be realized by driving the plate seat driving cylinder 26. The two groups of supporting rollers 27 are rotatably installed on the upper parts of the two groups of lifting guide columns through the rotating shaft support. The placed hood workpiece can be installed and supported by the two groups of supporting rollers 27.

[0028] The welding mechanism is used for welding the hood workpiece. The welding mechanism includes a welding support 20, a lateral drive motor 21, a vertical drive motor 22, and a laser welding head 23. The welding support 20 is movably installed on the side of the bottom support 1 by driving of the lateral drive motor 21. Specifically, as shown in the appendix Figure 7 As shown, in order to facilitate the movement and support of the welding support 20, a lateral rail seat is provided at the rear side of the bottom support 1. The lower part of the welding support 20 is slidably and fittingly supported and installed with the rail seat part on the upper part of the lateral rail seat. The lateral drive motor 21 is used for driving the displacement of the welding support 20. The lateral drive motor 21 is fixedly installed on the side of the lateral rail seat. A drive lead screw is installed at the shaft end of the lateral drive motor 21. The drive lead screw is threadedly installed with the threaded hole part at the lower part of the welding support 20. The laser welding head 23 is movably installed for lifting by driving of the vertical drive motor 22 on the side of the welding support 20. Specifically, in order to facilitate the movement and guiding support of the laser welding head 23, a vertical rail seat is fixedly installed on the inner side of the welding support 20. The rear support part of the laser welding head 23 is slidably and fittingly installed with the rail seat part of the vertical rail seat. The vertical drive motor 22 is fixedly installed on the upper part of the welding support 20. A transmission lead screw is installed at the shaft end of the vertical drive motor 22. The transmission lead screw is threadedly installed with the threaded hole part of the support part of the laser welding head 23. Through the biaxial drive and the axial self-rotation of the positioning cylinder seat, the welding process of the installed hood workpiece can be realized.

[0029] Working principle or structural principle: Feeding and positioning: Before processing, the barrel ring part and the head seat part of the hood workpiece are supported and installed on the upper part of the support roller columns 27 above the transport pedestal 24. Then, the device is switched to the loading mode. The support turntable 4 is driven by the rotary drive motor 5 to turn downwards by 90 degrees, so that the lower positioning cylinder seat 6 and the upper positioning cylinder seat 7 are in a horizontal state. Then, the lifting plate seat 25 is driven by the plate seat drive cylinder 26 to lift and lower to adjust the support height of the hood workpiece so that the hood workpiece and the positioning cylinder seat are in a coaxial state. Then, the hood workpiece is installed on the upper part of the positioning cylinder seat in a sleeved manner by pushing. Then, the inner support clamp seat 11 is driven to expand by the lower clamp seat drive motor 9 and the upper clamp seat drive motor 10, and the inner side of the hood workpiece is pre-supported and limited by the support guide wheels 12. Then, after adjusting the position of the hood workpiece by lifting, the inner side of the hood workpiece is limited and supported by the inner support clamp seat 11 through outward expansion, and the feeding and positioning of the hood workpiece are completed; Turning and feeding: After the feeding and positioning are completed, the support turntable 4 is driven by the rotary drive motor 5 to turn upwards by 90 degrees, so that the lower positioning cylinder seat 6 and the upper positioning cylinder seat 7 are in a vertical state, and the turning and feeding work of the hood workpiece is completed; Positioning welding: after the loading is completed, the upper positioning cylinder seat 7 is driven downward by the lifting drive cylinder 8 to make the cylinder ring part and the head seat part of the hood workpiece close to each other, and the position of the head seat part of the hood workpiece is adjusted and corrected for the second time by coordinating the retraction of the upper positioning cylinder seat 7 through the observation interface. After completion, the adjusted head seat part of the hood workpiece is limited and fixed by the internal support clamping, and the welding sides of the cylinder ring part and the head seat part of the hood workpiece are closely contacted by the falling of the lifting drive cylinder 8. Then, the laser welding head 23 is displaced and driven by the cooperation of the horizontal drive motor 21 and the vertical drive motor 22, so that the laser welding head 23 is on the welding side of the hood workpiece, and then the support turntable 4 is driven by the rotating drive motor 5 to drive the hood workpiece to rotate axially. In the process, the laser welding head 23 completes the butt welding of the cylinder ring part and the head seat part of the hood workpiece; Flipping and unloading: After welding is completed, the support turntable 4 is flipped downward 90 degrees by rotating the drive motor 5, so that the lower positioning cylinder seat 6 and the upper positioning cylinder seat 7 are in a horizontal state, and then the transport platform 24 is pushed to the bottom of the hood workpiece, and then the plate seat driving cylinder 26 drives the jacking and lifting plate seat 25 to support the support roller column 27 on the lower part of the hood workpiece, and then the inner support clamp seat 11 on the side of the lower positioning cylinder seat 6 and the upper positioning cylinder seat 7 retracts, so that the released hood workpiece is supported on the upper part of the transport platform 24, and then the hood workpiece is moved out of the processing area by pushing to complete the unloading of the hood workpiece.

[0030] In summary, the present welding device adopts a flip-type pedestal installation structure, and uses the flip support 2 as the clamping support structure of the workpiece. With the working drive of the flip drive motor 3, the flip support 2 can switch between the vertical and horizontal support states. With the transport pedestal 24 moved on the upper part of the flip support 2, the loading and unloading installation of the hood workpiece can be completed conveniently and quickly, which greatly improves the loading and unloading installation convenience of the device. An inner expansion support workpiece positioning structure is adopted. The upper positioning cylinder seat 7 is driven by the lifting drive cylinder 8 to be coaxially lifted and installed on the upper part of the lower positioning cylinder seat 6. With the inner support clamp seat 11 driven by the seat drive motor, the cylinder body and the head seat of the hood can be clamped and supported from the inside, and the clamping and positioning are fast. The inner support clamp 11 is used to hold the hood in place and to adjust the workpiece so that the hood is positioned properly and the welder can move more easily and precisely.

[0031] Those skilled in the art will appreciate that the features recited in the various embodiments and / or claims of the present invention can be combined or / and combined in various ways, even if such combinations or combinations are not explicitly recited in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recited in the various embodiments and / or claims of the present invention can be combined and / and combined in various ways. All such combinations and / and combinations fall within the scope of the present invention.

Claims

1. A welding device for an aircraft engine hood, comprising a clamping mechanism, a welding mechanism and a loading mechanism, characterized in that: The clamping mechanism is used for clamping and installing the hood workpiece. The clamping mechanism includes a bottom bracket (1), a flipping support (2), a flipping drive motor (3), a supporting turntable (4), a rotating drive motor (5), a lower positioning cylinder seat (6), an upper positioning cylinder seat (7), a lifting drive cylinder (8), a lower clamp seat drive motor (9), an upper clamp seat drive motor (10), an inner support clamp seat (11) and a supporting guide wheel (12). The flipping support (2) is driven by the flipping drive motor (3) to be flip-mounted on the upper part of the bottom bracket (1). The supporting turntable (4) is driven by the flipping drive motor (3) to rotate and is mounted on the upper part of the flipping support (2). The lower positioning cylinder seat (6) is mounted on the upper part of the supporting turntable (4). The upper positioning cylinder seat (7) is driven by the lifting drive cylinder (8) to be movably lifted and installed on the upper part of the lower positioning cylinder seat (6). The inner support clamp seat (11) is driven by the lower clamp seat drive motor (9) and the upper clamp seat drive motor (10) and is respectively mounted on the outer peripheral sides of the lower positioning cylinder seat (6) and the upper positioning cylinder seat (7). The supporting guide wheel (12) is retractably mounted on the edge of the inner support clamp seat (11); The welding mechanism is used for welding the hood workpiece. The welding mechanism includes a welding support (20), a lateral drive motor (21), a vertical drive motor (22) and a laser welding head (23). The welding support (20) is driven by the lateral drive motor (21) to be movably installed on the side of the bottom bracket (1). The laser welding head (23) is driven by the vertical drive motor (22) to be movably lifted and installed on the edge of the welding support (20); The loading mechanism is used for loading, transferring and supporting the engine hood. The loading mechanism includes a transportation pedestal (24), a lifting plate seat (25), a plate seat drive cylinder (26) and a supporting roller column (27). The transportation pedestal (24) is horizontally movably installed on the upper part of the bottom bracket (1). The supporting roller column (27) follows the lifting plate seat (25) and is driven by the plate seat drive cylinder (26) to be movably lifted and installed on the upper part of the transportation pedestal (24).

2. The welding device for the engine cover of an aircraft according to claim 1, characterized in that: The flipping support (2) is supported by a bilateral rotating shaft and is fixedly flipped and installed on the upper rear side of the bottom bracket (1). The flipping drive motor (3) is fixedly installed on the side of the bottom bracket (1). A drive gear is fixedly installed at the shaft end of the flipping drive motor (3). A semi-circular tooth seat is arranged at the edge of the flipping support (2). The drive gear is meshed and installed with the tooth groove part of the semi-circular tooth seat.

3. The welding device for an aircraft engine cover according to claim 2, wherein: The supporting turntable (4) is fixedly rotatably installed on the upper part of the flipping support (2). The rotating drive motor (5) is fixedly installed at the rear part of the flipping support (2). A transmission gear is fixedly installed at the shaft end of the rotating drive motor (5). The transmission gear is meshed and installed with the tooth groove part at the lower part of the supporting turntable (4).

4. The welding device for the engine hood of an aircraft according to claim 3, characterized in that: The lower positioning cylinder seat (6) is fixedly mounted on the upper part of the supporting turntable (4); the lower part of the upper positioning cylinder seat (7) is evenly and circumferentially fixedly mounted with a lifting guide column (15); the lower part of the lifting guide column (15) is movably plugged into the socket part of the upper part of the upper positioning cylinder seat (7); the lifting drive cylinder (8) is fixedly mounted on the inner side of the cavity in the middle part of the lower positioning cylinder seat (6); and the lower part of the upper positioning cylinder seat (7) is fixedly connected to the push rod end of the lifting drive cylinder (8).

5. The welding device for the engine cover of an aircraft according to claim 4, characterized in that: The lower positioning cylinder seat (6) and the upper positioning cylinder seat (7) are both provided with a driving disc seat (13) and a driving support arm (14). The two sets of driving disc seats (13) are rotatably mounted inside the lower positioning cylinder seat (6) and the upper positioning cylinder seat (7), respectively. The lower clamp seat driving motor (9) and the upper clamp seat driving motor (10) are respectively installed in transmission with the two sets of driving disc seats (13) via rotating shafts.

6. The welding device for the engine cover of an aircraft according to claim 5, characterized in that: A plurality of the driving arms (14) are provided, and the plurality of the driving arms (14) are evenly distributed in a circular shape. The driving arms (14) are slidably engaged with guide grooves provided on the sides of the lower positioning cylinder seat (6) and the upper positioning cylinder seat (7). An arc-shaped tooth seat is provided at the end of the driving arm (14), and the arc-shaped tooth seat is slidably engaged with a spiral groove provided on the upper part of the driving disc seat (13).

7. The welding device for the engine hood of an aircraft according to claim 6, characterized in that: The end of the inner support clamp seat (11) is fixedly installed with the end of the driving support arm (14) by means of slot-engaging matching bolts. The support guide wheels (12) are arranged in pairs. The inner sides of the installation slots arranged at both ends of the inner support clamp seat (11) are respectively slidably engaged with guide wheel connecting blocks (16). The support guide wheel (12) is rotatably installed on the upper part of the guide wheel connecting block (16) through a rotating shaft supporting a fixed axis. The guide wheel connecting block (16) is abutted against the installation side of the installation slot by a spring (17). Both sides of the middle part of the guide wheel connecting block (16) are penetrated and installed. The lower end of the limit bolt column (18) is slidably engaged with the limit guide groove arranged in the installation slot. A clamping support pad (19) is fixedly installed on the middle part of the outer side of the inner support clamp seat (11).

8. The welding device for the engine hood of an aircraft according to claim 1, wherein: A transverse rail seat is arranged at the rear edge of the bottom bracket (1); the lower portion of the welding support (20) is slidably engaged with the rail seat portion of the upper portion of the transverse rail seat for support installation; the transverse drive motor (21) is fixedly installed on the side of the transverse rail seat; a drive screw is installed on the rotating shaft end of the transverse drive motor (21); the drive screw is threadedly installed with the screw hole portion of the lower portion of the welding support (20); a vertical rail seat is fixedly installed on the inner side of the welding support (20); the rear support portion of the laser welding head (23) is slidably engaged with the rail seat portion of the vertical rail seat; the vertical drive motor (22) is fixedly installed on the upper portion of the welding support (20); a transmission screw is installed on the rotating shaft end of the vertical drive motor (22); the transmission screw is threadedly installed with the screw hole portion of the support portion of the laser welding head (23).

9. The welding device for the engine cover of an aircraft according to claim 1, characterized in that: The lower part of the transportation pedestal (24) is supported and installed with support track wheels through a rotating shaft. The support track wheels are supported and installed in a rolling manner on the track part at the front of the bottom bracket (1). The upper part of the lifting plate seat (25) is fixedly installed with lifting guide columns. The lifting plate seat (25) is supported and movably fitted inside the lifting groove seat arranged on the upper part of the transportation pedestal (24) through the lifting guide columns. A plurality of plate seat driving cylinders (26) are provided. The plate seat driving cylinders (26) are fixedly installed on the lower part of the transportation pedestal (24). The push rod end of the plate seat driving cylinder (26) is fixedly installed with the lower part of the lifting plate seat (25). Two groups of support roller columns (27) are respectively rotatably installed on the upper parts of two groups of lifting guide columns through a rotating shaft support.

10. The processing method of a welding device for an aircraft engine cover according to any one of claims 1-9, characterized in that, It includes the following steps: S1. Loading and positioning: Before processing, the barrel ring part and the head seat part of the hood workpiece are supported and installed on the upper parts of the support roller columns (27) above the transportation pedestal (24). Then, the device is switched to the loading mode. The support turntable (4) is driven by the rotation driving motor (5) to turn downward by 90 degrees, so that the lower positioning cylinder seat (6) and the upper positioning cylinder seat (7) are in a horizontal state. Then, the lifting plate seat (25) is driven by the plate seat driving cylinder (26) to lift and lower to adjust the support height of the hood workpiece so that the hood workpiece is in a coaxial state with the positioning cylinder seat. Then, the hood workpiece is installed on the upper part of the positioning cylinder seat in a sleeved manner by pushing. Then, the inner support clamp seat (11) is driven by the lower clamp seat driving motor (9) and the upper clamp seat driving motor (10) to expand, and the inner side of the hood workpiece is pre - supported and limited by the support guide wheels (12). Then, after adjusting the position of the hood workpiece by lifting, the inner side of the hood workpiece is limited and supported by the inner support clamp seat (11) through outward expansion, and the loading and positioning of the hood workpiece is completed. S2. Inverting and loading: After completing the loading and positioning, the support turntable (4) is driven by the rotation driving motor (5) to turn upward by 90 degrees, so that the lower positioning cylinder seat (6) and the upper positioning cylinder seat (7) are in a vertical state, and the inverting and loading work of the hood workpiece is completed. S3. Positioning and welding: After loading, the upper positioning cylinder seat (7) is driven by the lifting driving cylinder (8) to move downward so that the barrel ring part and the head seat part of the hood workpiece are close to each other for butt - joint. By observing the interface and retracting the upper positioning cylinder seat (7), the position of the head seat part of the hood workpiece is adjusted and corrected for the second time. After completion, the adjusted head seat part of the hood workpiece is limited and fixed by inner support clamping, and the welding sides of the barrel ring part and the head seat part of the hood workpiece are closely contacted by the lowering of the lifting driving cylinder (8). Then, the laser welding head (23) is driven for displacement by the cooperation of the lateral driving motor (21) and the vertical driving motor (22) so that the laser welding head (23) is located on the welding side of the hood workpiece. Then, the support turntable (4) is driven by the rotation driving motor (5) to drive the hood workpiece to rotate axially. During the process, the butt - joint welding work of the barrel ring part and the head seat part of the hood workpiece is completed by the laser welding head (23). S4. Invert and unload. After welding is completed, the support turntable (4) is driven by the rotation drive motor (5) to be turned downward by 90 degrees, so that the lower positioning cylinder base (6) and the upper positioning cylinder base (7) are in a horizontal state. Then, the transport pedestal (24) is pushed to the lower part of the hood workpiece. After that, the lifting and lowering plate pedestal (25) is driven by the plate pedestal drive cylinder (26) to make the support roller columns (27) support the lower part of the hood workpiece. Then, the inner support clamp seats (11) on the sides of the lower positioning cylinder base (6) and the upper positioning cylinder base (7) retract, so that the released hood workpiece is supported on the upper part of the transport pedestal (24). After that, the hood workpiece is moved out of the processing area by pushing, and the unloading work of the hood workpiece is completed.

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