207 results about "Hole making" patented technology

The present invention belongs to the technical field of composite material processing, and relates to a hole making tool for aramid fiber-reinforced plastic and a design method thereof. The drill bit has a step reversed point angle structure, which can reduce a trust force during drilling and effectively cut off a high toughness aramid fiber, thus to improve the hole making quality of an AFRP-related component. It is proved that the new tool can significantly improve the hole making quality of an AFRP component, improve the service life and safety degree, and greatly reduce the processing cost. Therefore, the present invention has a broad application prospect in the fields of aerospace, military industries and civil application.

The invention discloses an adjustable self-centering drilling device which comprises an adjusting screw rod and an adjusting cone, and the bottom end of the adjusting screw rod is fixedly connected with the adjusting cone; a center hole is formed in the center of the adjusting cone and used for allowing the spring fixing rod to penetrate. A groove gap is formed in the side part of the adjusting cone and is communicated with the central hole; a threaded hole is formed in the base, and the adjusting screw rod penetrates through the threaded hole and can move up and down; a plurality of positioning holes are formed in the base and used for allowing a drilling tool to penetrate through; the fixed cover is fixedly connected with the base; a through hole is formed in the fixed cover; the periphery of the fixed cover is sleeved with a to-be-machined workpiece; one end of the telescopic rod is provided with a boss which is used for being inserted into the edge of the groove gap and can slide, and the other end of the telescopic rod penetrates through the through hole and is fixedly connected with the telescopic supporting head; one end of the telescopic spring is connected with the spring fixing rod, and the other end of the telescopic spring is connected with the telescopic supporting head; by means of the device, machining of circumferential flange holes of a workpiece to be machined can be completed in a self-centering mode, and additional standard alignment is not needed.

The invention provides a coal seam collaborative anti-reflection method and a cave forming device. The coal seam cave forming device comprises a mounting main body and a blade mechanism for rotationally forming a cave. The collaborative permeability increasing method for the coal seam comprises the following steps that a coal seam sample is collected, experimental analysis is conducted, and the optimal acidizing fracturing fluid proportion is determined; fracturing drill holes and gas extraction drill holes are constructed; acid fracturing operation is carried out, and then gas extraction is carried out; gas extraction data are continuously monitored, and the extraction effect and abnormal conditions are analyzed; early warning is conducted on the extraction abnormal area, the extraction abnormal area is marked as a potential blank zone, rechecking is conducted through the micro-seismic monitoring technology, and the range and characteristics of the blank zone are determined; according to the geological conditions of the coal seam of the blank zone area, hydraulic punching or mechanical hole making is carried out to supplement pressure relief and permeability increasing measures; and gas extraction is recovered, and monitoring is enhanced. According to the method, a blank zone is effectively eliminated, efficient, uniform and long-term extraction of coal seam gas is guaranteed, and double optimization of the extraction effect in time and space is achieved.

The invention belongs to the technical field of numerical control machining, and particularly relates to an automatic machining method for a guide hole of a complex aviation structural member, which comprises the following steps: installing a visual system, a robot and a part tool; creating a robot base coordinate system O, a part machining coordinate system O1 and a tail end drilling tool coordinate system O2; before drilling, calculating a relation matrix W1 of O and O1 and a theoretical value W2 of a relative position relation matrix of O1 and O2; guide hole position information of the part under the machining coordinate system O1 is obtained; the hole site information is converted to a robot base coordinate system O through a matrix W1, the motion trail of a tail end hole making tool under O is determined, and an NC program with O as the benchmark is generated; and an NC program is executed, a visual system observes a position relation matrix W3 of a tail end hole forming tool coordinate system O2 and a part machining coordinate system O1 in real time, the deviation between the W3 and a theoretical value W2 is calculated, the position of the tail end hole forming tool is corrected through the deviation W2-W3, and automatic machining of the part guide hole is achieved.

The invention discloses a method and a device for designing, selecting and matching a pressing mechanism of automatic drilling equipment for aircraft assembly, and the method and the device are suitable for an aircraft assembly drilling process and serve as a guiding scheme for structural design of the automatic drilling equipment. Manufacturing indexes of different working condition differences of all hole sites are determined based on aircraft assembly hole manufacturing process correlation parameters; determining the size type of the pressing mechanism to be solved based on the structural characteristics of the pressing mechanism of the automatic hole making equipment; the curvature feature of the current hole making position is recognized, and a correlation model of the corresponding pressing mechanism size design is called; and threshold calibration is carried out based on the manufacturing index of the current hole manufacturing position, and pressing mechanisms of different sizes are preferably selected and matched. According to the invention, the characteristics of the to-be-processed product and the structural characteristics of the pressing mechanism of the automatic hole-making equipment can be interactively associated, and the accuracy and flexibility of selecting and matching the tail end mechanism of the automatic hole-making equipment can be improved.

The invention relates to a weak rigidity component hole position alignment and depth control machining device and method.Three laser distance measuring sensors are evenly distributed around a spindle at the tail end of a hole making robot, during hole making, a mechanical arm drives the tail end of the hole making robot to move to the position above a hole position, and the tail end of the hole making robot conducts posture adjustment and hole making direction feeding; light emitted by the laser distance measuring sensor falls on the periphery of the hole site, and before hole making machining, the distance value measured by the laser distance measuring sensor is used for calculating the normal vector of the to-be-machined hole site and feeding back the normal vector to the hole making robot for tail end posture adjustment; in the dimple process, the distance value measured by the laser distance measuring sensor is used for calculating the workpiece surface deformation amount in real time and feeding back the workpiece surface deformation amount to the hole making robot for continuous feeding depth compensation, and hole making and dimple work is completed.

The invention provides a robot tail end hole making system and method based on contact type normal correction, and relates to the technical field of aeronautical manufacturing and airplane digital assembly. The system is connected with a tail end mechanical arm of the industrial robot through a detachable connecting interface and comprises a hole forming actuator and a control subsystem. The control subsystem is configured to control the hole forming actuator to move to the position, where holes are to be formed, on the wall plate. A hole forming actuator is controlled to make contact with the surface of the wall plate, and normal information of the to-be-formed hole position is detected through a sensor arranged on the hole forming actuator; according to the normal direction information, the adjusting posture of a drilling actuator is controlled, so that the axis of the cutter is consistent with the normal direction of the position to be drilled; by measuring the back-off amount of the wall plate, the hole forming actuator is controlled to compensate the TCP position of the cutter; and after the posture adjustment and the TCP displacement compensation are completed, a hole forming actuator is controlled to complete hole forming machining. According to the invention, the high-precision drilling requirement for aircraft assembly can be met, and support is provided for an aircraft digital assembly technology.

The invention belongs to the field of aircraft digital assembly automatic drilling and riveting, and particularly discloses an automatic drilling and riveting machine actuator normal alignment method and system.The method comprises the steps that firstly, the original distance from the end face of a presser foot to the plane around a to-be-machined hole is collected through a sensor; then, a KF-MAF algorithm combining Kalman filtering and moving average filtering is adopted to suppress dynamic noise, and accurate distance information is obtained; then, the deviation between the feeding direction of an actuator and the normal direction of the surface of the hole to be machined is calculated, and the angle error amount of a target hole site is obtained through a bilinear interpolation method; and finally, an actuator is controlled to rotate to compensate errors, the position of the center point of the tool is kept unchanged, the axis of the drill bit coincides with the local surface of the workpiece in the normal direction, and normal alignment is achieved. According to the method, the needed original information is less and easy to obtain, alignment can be accurately and rapidly completed, and the drilling precision is guaranteed.

An automatic bed-forming robot, comprising a fixing frame (1), wherein a bed-forming roller (3) is provided in an inner cavity of the fixing frame (1); a hole digging mechanism (4) is provided on the surface of the bed-forming roller (3), and the hole digging mechanism (4) comprises vertical columns (41), a storage assembly (42) and an extension and retraction assembly (43), and the extension and retraction assembly (43) comprises a transmission part (431) and a control part (432); a fixed cylinder (6) is rotationally mounted in the inner cavity of the fixing frame (1); a hole making mechanism (7) is provided on the surface of the fixed cylinder (6); and the hole making mechanism (7) comprises insertion rods (71) and a guide assembly (72), and a plurality of groups of insertion rods (71) are provided and are uniformly distributed on the annular surface of the fixed cylinder (6). The automatic bed-forming robot solves the problem whereby existing bed-forming apparatuses can only perform a leveling treatment on soil, and cannot dig planting holes while forming a bed, resulting in a low overall seeding efficiency.

The present invention belongs to the field of production and manufacturing technology, and proposes a method for obtaining the height of metal burrs. This method addresses the problems that existing methods cannot directly obtain the burr height of the entire circumference, and must manually select measurement points and then repeat multiple measurements to calculate the average, which is time-consuming, obviously subjective, has large errors, and low precision. The proposed method for obtaining the height of metal burrs obtains metal burr point cloud data through image processing, and then performs fitting and index evaluation through mathematical methods to obtain a quantitative evaluation method for the burr height of the entire hole. The present invention significantly improves the efficiency of metal burr height measurement, avoids the problems of high subjectivity and low reliability of metal burr height measurement results, and can be applied to the optimization of process parameters in working conditions such as metal drilling, composite material / metal laminate drilling, etc. It can help related companies research new technologies for aluminum alloy deburring, reduce hole making costs, and has good engineering prospects.

The invention relates to a high-quality and high-efficiency laser drilling method. Aiming at the problems of low processing efficiency, poor hole making quality, unstable processing technology and the like in small hole laser processing of difficult-to-process materials, the method specifically comprises the following steps of: 1, performing high-feed rotary spiral hole making, and removing a large amount of materials to form through holes; namely, a proper rotating laser beam (rotating radius r1) is selected to form a laser ring, and spiral drilling is performed in a high-feed manner, so that a large amount of materials can be removed, and through holes can be formed. The second step is low-feed rotary finish machining, a small amount of materials are removed to form a through hole, the rotating radius r2 of a rotating laser beam is adjusted, the hole is subjected to finish machining at the low z-axis feeding speed, the high-quality through hole is obtained, and if the quality of the through hole or the hole repairing part is not qualified, the parameters are further adjusted. According to the method, the advantages of high femtosecond laser machining precision and small thermal damage are combined, efficient machining of the small holes is achieved, and a solution is provided for high-quality and efficient machining of the small holes.

The invention discloses an aircraft assembly drilling method and device based on a high-energy laser beam, and the method comprises the steps: adjusting the current posture of equipment through a normal alignment module in an end effector of the equipment, and enabling the irradiation direction of the high-energy laser beam to be the normal direction of a product; the product structure of the current hole forming position is locally pressed through a pressure foot module in an end effector of the hole forming equipment; a high-energy laser beam coupling module in an end effector of the drilling equipment is used for carrying out beveling annular spiral scanning on the product until a conical blind hole molded surface is formed; and the high-energy laser beam coupling module in the end effector of the hole making equipment is adjusted again to be the normal posture of the hole making position, the posture is kept, the center of the conical blind hole serves as the circle center, and circular cutting straight hole machining is conducted till a complete assembly through hole is formed. The problem that the machining precision is low due to local deformation of a weak-rigidity product can be solved, meanwhile, the link of disassembly, finish machining and secondary racking in the assembling and hole forming procedure can be omitted, and the comprehensive hole forming efficiency is improved.

The present invention discloses an apparatus and method for reducing burrs in hole making of laminated materials. The apparatus comprises a frame, a supporting mechanism and a pressing mechanism are provided on the frame, the supporting mechanism is located below the pressing mechanism, a drilling assembly is provided on the pressing mechanism, the pressing mechanism is used to compress and fix the laminated material placed between the supporting mechanism and the pressing mechanism on the supporting mechanism, and the drilling assembly is used to make holes in the laminated material after being compressed; the pressing mechanism comprises an outer cylinder, a first movable plate and a second movable plate slidably arranged in the outer cylinder, the first movable plate is located above the second movable plate, a placement area is formed between the first and second movable plates, and a plurality of support balls are placed in the placement area. In actual use, the present invention makes the laminated material more compact by reducing the gap between layers, reduces burrs between layers when making holes, and thus improves the hole making quality of the laminated material.

The invention discloses robot drilling equipment and a working method, and relates to the technical field of machining, the robot drilling equipment comprises a multi-degree-of-freedom drilling robot and a multifunctional end effector, and the multifunctional end effector is connected to the execution tail end of the multi-degree-of-freedom drilling robot; the multifunctional end effector comprises a machine head, a three-way driving mechanism, a laser scanning sensor, a visual camera and a remote control handle, the laser scanning sensor and the visual camera are fixedly connected to one side of the machine head, and the three-way driving mechanism is connected with the machine head and drives the machine head to conduct X / Y / Z axis three-way position adjustment. According to the machining method, small-batch hole machining can be carried out, during small-batch machining, through a man-machine cooperation mode, hole machining is carried out in the mode that manual coarse positioning and machine automatic precise positioning are combined, the tedious operation of small-batch hole machining is simplified, and the response speed is increased.

This application relates to the field of machine tool technology and discloses a dual-mode hole-making machine tool and a hole-making method. The dual-mode hole-making machine tool includes a bed assembly, a crossbeam assembly, a slide assembly, a spiral milling and reaming unit, and a water-guided laser hole-making unit. During operation, after the equipment starts, the crossbeam assembly moves along the first direction of the bed assembly, and the slide assembly moves along the second direction of the crossbeam assembly to complete X and Y axis positioning; it acquires workpiece material, hole diameter, and depth-to-diameter ratio parameters to determine the processing mode. When hole making is required separately, the water-guided laser hole-making unit feeds along a third direction to complete the processing; when reaming is required separately, the spiral milling and reaming unit feeds along a third direction to complete the processing; when combined processing is required, the water-guided laser first creates the initial hole, maintaining the work position and posture unchanged, and then switches to spiral milling and reaming to create the final hole.

The invention discloses a dimple speed regulation device and method based on a two-stage speed regulation valve. The dimple speed regulation device comprises an integrated set sensing switch, a wireless pilot controller, the two-stage speed regulation valve and an assembly of the two-stage speed regulation valve. According to actual working conditions on site, dimple speed adjustment of a semi-automatic drilling and dimple integrated tool or a manual dimple tool is achieved, and meanwhile dimple surface quality and hole making efficiency are guaranteed. During dimpling operation, the integrated set sensing switch of the device needs to be installed on a semi-automatic drilling and dimpling integrated tool or a manual dimpling tool, a high-speed mode is started during drilling, the device is switched to a low-speed mode according to the vibration condition of the tool during dimpling, and the dimpling rotating speed of the tool is limited; when a manual dimple tool is used for machining a composite material, the device starts the tool in a low-speed mode when a dimple drill does not make contact with a machining material, the device is switched to a high-speed mode according to the vibration condition of the tool after making contact with the material, the device is switched to the low-speed mode when a tool retracts to be separated from the material, and low-speed advancing and retreating and high-speed dimple are achieved.

The utility model provides a device for preparing a rivet hole of a nut of a floating supporting plate, which comprises a bottom plate and a top plate, a positioning column is vertically arranged in the middle of the bottom plate, a positioning hole consistent with the positioning column in diameter is arranged in the middle of the top plate, a vertical positioning groove is arranged on the side face of the positioning column, and a positioning block matched with the positioning groove is arranged on the side edge of the positioning hole. The positioning columns penetrate through the positioning holes, the positioning blocks are located in the positioning grooves, guide holes are formed in the bottom plate and the top plate respectively, and the guide holes in the bottom plate and the guide holes in the top plate are overlapped in the vertical direction. According to the device for manufacturing the rivet hole of the floating supporting plate nut, the floating supporting plate nut can be completely fixed, the accuracy of the drilling position is kept, the device is easy and fast to operate, the structure is simple, manufacturing is convenient, the difficulty of hole manufacturing work can be greatly reduced, and the yield of products is improved.

The invention discloses a variable-parameter helical milling hole making method for an aircraft laminated structure, and aims to solve the problems of great damage to a laminated interface and insufficient precision of traditional hole making. According to the method, a database is established by pre-collecting laminated material parameters, and a helical milling path is planned; after equipment is started, contact sensing positioning is executed, and the rotating speed, the feeding speed and the lead angle of a milling cutter are dynamically adjusted according to interlayer material differences; and a gradual change parameter transition strategy is adopted in the interface transition area, and tool retracting and quality detection are conducted after hole forming is completed. According to the method, the technological parameters are optimized in real time according to the characteristics of different laminated materials, interface burrs and layering defects are reduced, the drilling precision and efficiency are improved, and the method is suitable for drilling of multiple types of aircraft laminated structures such as aluminum alloy / carbon fiber composite materials and has high practicability and popularization value.

The invention provides a laser processing vacuum observation device for rapidly switching protective lenses, and relates to the technical field of laser precision cutting and hole making devices, the laser processing vacuum observation device comprises a vacuum box, a laser precision cutting and hole making device, a laser precision cutting and hole making device, a laser precision cutting and hole making device, a laser precision cutting and hole making device and a laser precision cutting and hole making device, a laser; a pair of lens changing openings are formed in the quick lens changing rotary disc, lens mounting discs are arranged in the lens changing openings in a lifting mode, and light-transmitting lenses are mounted above the lens mounting discs in a threaded mode; and the lens cleaning mechanism is used for wiping and cleaning the light-transmitting lens by scraping and contacting the light-transmitting lens through a cleaning rotating rod. According to the invention, rapid and reliable switching between the working lens and the standby / cleaning lens is realized, the processing interruption time caused by replacing or cleaning the lens is reduced, the processing efficiency and the stability of the vacuum environment are guaranteed, a set of lens cleaning mechanism is arranged, the manual intervention frequency is obviously reduced, and the production cost is reduced. And the lens can be reused, so that the lens replacement cost is reduced.

The utility model provides a pincher processing and drilling device, which relates to the technical field of pincher drilling and comprises a drilling box, a worktable mounted in the drilling box, drilling drills arranged on two sides of the top of the worktable and a positioning component arranged on the top of the worktable, and the positioning component comprises a cushion block, a positioning block and a scale layer. Two cushion blocks are installed at the top of the workbench, and positioning blocks are fixedly installed at the tops of the two cushion blocks through bolts. According to the positioning assembly of the pinchers machining hole-making device, the hole-making end of the pinchers mouth and the hole-making drill bit can be rapidly aligned and placed, the problem that the pinchers mouth needs to be repeatedly debugged for multiple times when manual comparison clamping and fixing are carried out is solved, the hole-making end of the pinchers mouth can be positioned and placed, operation is easy and convenient, and time and labor are saved; and the air flow generated by the cleaning assembly is quickly blown out towards the drilling drill bit, scraps generated by drilling around the drilling drill bit are blown away, the drilling position of the clamp mouth is kept clean, and the drilling quality of the clamp mouth is prevented from being affected.

The application relates to the field of aerospace technology and discloses a cabin section structure suitable for a recoverable carrier rocket, which comprises a cabin section structure main body, the cabin section structure main body is mainly composed of a thin wall, a high rib and a grid, and the thin wall and the high rib are integrated through the spinning, milling and turning modes to process an aluminum alloy cylinder ingot, so that the design time of the rivet structure is reduced, and the design efficiency is improved. A large number of part assembly designs are needed for a traditional semi-hard shell structure, including rivet design. The rivet design is related to hole making requirements, positioning size and rivet specifications and the like. The design work usually accounts for 30-40% of the workload of a designer. However, the unit wall plate structure of the application cancels the rivet structure, realizes rivet avoidance design, and greatly improves the design efficiency of the structure product.

The application discloses a method for researching the influence of random hole geometric deviation on the strength of an aircraft wall plate connecting structure, and relates to the field of advanced composite material connection, and comprises the following steps: determining a characterization parameter of hole geometric deviation of a composite material strip-hole laminated plate test piece; establishing a simulation model of a composite material single-nail connecting structure plug-nail connection without hole geometric deviation; based on the characterization parameter and the simulation model of the composite material single-nail connecting structure plug-nail connection without hole geometric deviation, a simulation model of a composite material single-nail connecting structure interference plug-nail process is established; a simulation model of a composite material connecting structure tensile load is established; based on the simulation model of the composite material connecting structure tensile load, a probability distribution graph of the strength change value of the structure is established, and the strength distribution trend under different geometric deviations is determined; and based on the strength distribution trend under different geometric deviations, a new composite material hole making deviation design criterion is constructed. The application can improve the hole making precision of the connecting hole, and reduce the manufacturing difficulty and cost.

The application discloses a kind of based on radar chart's hole making quality evaluation method, system and storage medium, belong to the technical field of hole making quality evaluation, determine N features data of influencing hole making quality, and corresponding N-dimensional radar chart is drawn as radar chart evaluation model;Obtain the feature data of hole making, adopt box plot method to correct.Based on the feature data after correction, draw closed radar chart;The area of the radar chart drawn is calculated, and the quality of hole making is measured based on the size of area;If N feature data is all negatively correlated with the quality of hole making, then the smaller the area of the radar chart drawn, the higher the quality of hole making;If N feature data is all positively correlated with the quality of hole making, then the larger the area of the radar chart drawn, the higher the quality of hole making.The application realizes multidimensional feature correlation evaluation, avoids the difference caused by subjective evaluation, intuitively compares the quality of hole making by radar chart area, quickly locates the advantages and disadvantages of hole making quality, with good practicability.

A kind of vector deviation detection method of laser step gun based hole making method, first, the standard rivet hole position is drilled and countersunk on the measured part, then a plurality of measurement points are determined in the standard rivet hole position, the concave-convex amount of the measurement points is measured by using the laser step gun, the coordinate value of the coordinate origin in the standard rivet hole position is calculated, the actual deviation value of the hole position is obtained from the coordinate value of the coordinate origin, and finally the actual deviation value of the hole position is compared with the theoretical normal line, and the vector deviation is obtained.The present application effectively solves the problem of normal value deviation measurement of rivet hole of oversized curved surface product;It can be measured in time in actual production environment, and the normal deviation value can be quickly obtained by calculation, and the measurement data is convenient for research and analysis.

The utility model relates to an auxiliary punching template for a special-shaped sealing element. An existing hole forming technology for the special-shaped sealing element is low in efficiency, holes cannot be formed in advance, and the hole forming quality is low. The sealing structure comprises a cover plate and a base, after the cover plate and the base are assembled through a fixing assembly, a cavity is formed in the cover plate and the base, and a sealing piece is arranged in the cavity; the cover plate is divided into a plurality of parts, and each part is provided with a plurality of notches and a plurality of hole sites. According to the utility model, the cover plate and the base are arranged, and the time for determining the assembly hole site of the sealing element can be shortened through the hole site corresponding to the assembly hole site of the sealing element on the cover plate, so that the hole making operation efficiency is improved; according to the utility model, the hole can be formed in advance, so that the assembly period can be shortened, and meanwhile, through the fixing of the positioning pin and the laser cutting processing, the hole site precision of the template and the sealing element is high, so that the hole forming quality is improved, and the operation is simple.

The invention discloses a robot drilling end effector simulating vibration reduction of the head of a woodpecker and a using method of the robot drilling end effector. The effector comprises a frame module, a drilling module, a vision module, a pressing module and a normal detection module. The frame module provides installation positions for the hole forming module, the pressing module and the vision module and is connected with a flange at the tail end of a robot. The hole making module comprises a driving motor and a high-speed main shaft and is an execution part of the hole making action of the actuator; the visual module is used for positioning a machining point before the actuator is used for drilling; the pressing module is used for pressing the workpiece, and workpiece sliding and vibration generated when the hole forming module works are reduced. And the normal detection module is used for measuring the normal deviation between the high-speed main shaft and the surface of the current workpiece, so that the pose of the drilling module is adjusted to ensure the drilling perpendicularity. According to the invention, the vibration generated by drilling by the robot can be reduced, and the hole machining precision is improved.

The utility model discloses a novel electric control hydraulic punching device which comprises a shell, an electric cylinder connecting base is fixedly installed in the shell, a telescopic electric cylinder is installed in the electric cylinder connecting base, a top end cover is installed at the output end of the telescopic electric cylinder, and an electric cylinder pressure stabilizing plate protection outer pipe is fixedly installed in the shell. A power line connecting piece is fixedly mounted in the shell; the device is placed in a mechanical water jet cutter of an underground hydraulic cave-making water jet cutter device, the top end cover is controlled to move through stretching and retracting of the output end of the telescopic electric cylinder, and a water flow channel in the water jet cutter can be changed through movement of the top end cover, so that water flow can flow in the preset direction; therefore, the water flow direction in the water jet cutter is precisely controlled, the cutting efficiency and the hole forming quality of the water jet cutter can be remarkably improved through precise water flow control, and energy consumption and equipment abrasion are reduced.

The present invention discloses a positioning tooling for exhaust duct acoustic liner for hole making of an aeroengine nacelle, which relates to the field of aeroengine manufacturing. The positioning tooling includes a rotary transfer station platform, an acoustic liner support bottom plate, a support frame and vacuum suckers. The acoustic liner support bottom plate is adapted to the inner shape of the exhaust duct acoustic liner, and a middle part thereof protrudes outwards to form an arc part. The support frame includes a triangular support frame and a plurality of annular support pipes for supporting the arc part, and each annular support pipe is adapted to the arc part. The present invention can realize flexible and efficient positioning of the exhaust duct acoustic liner of the aeroengine nacelle, provide conditions for automatic and precise hole making of the exhaust duct acoustic liner, and can also provide reference for the design of positioning tooling for other acoustic liner parts, and provide technical support for the formulation of relevant design and development specifications or standards.

The present invention discloses an automatic processing center for large-size angle steels for ultra-high voltage projects, comprising the following steps: loading: placing the angle steel on a loading rack, transporting it to a limiting mechanism along a loading conveyor belt, then clamping and fixing both sides of the angle steel, and then cutting the angle steel by laser using a laser cutting machine; making holes: making holes on both limbs of the angle steel by a five-axis drilling machine, and stamping them with a steel stamp; then, moving the angle steel to the vicinity of the next hole point, clamping both sides of the angle steel, and completing the hole making work; making a hole judgment on the angle steel, and if there is no hole drilled at the corresponding position on the angle steel, continuing to complete the hole making work according to the above steps; if there is a hole drilled at the corresponding position on the angle steel, moving the angle steel to the other end, clamping both sides of the angle steel, cutting the material by laser, moving the angle steel to a unloading rack, flipping the rack, and the workpiece into a finished product. The present invention ensures that the angle steel is precisely located at the processing station, ensures the accuracy of the angle steel processing, and improves the quality of the angle steel processing.

The utility model discloses a steel structure production hole making device which comprises a supporting frame, a punching mechanism is arranged on the supporting frame, the punching mechanism comprises sliding rods, sliding seats, an installation frame, a driving machine, a hydraulic cylinder, a quick fixing mechanism and a drill bit, the multiple sets of sliding rods are fixed to the supporting frame, the multiple sets of sliding seats are arranged on the outer walls of the multiple sets of sliding rods in a sliding mode, and the multiple sets of sliding seats are arranged on the installation frame. The mounting frame is fixed to the outer walls of the multiple sets of sliding seats, the driving machine is fixed to the outer wall of the mounting frame, the hydraulic cylinder is fixed in the supporting frame, the telescopic end of the hydraulic cylinder is fixedly connected with the mounting frame, the quick fixing mechanism comprises a fixing sleeve, sliding blocks, clamping blocks, a pushing block, a sliding sleeve, a mounting rod and a clamping groove, the fixing sleeve is fixed to the output end of the driving machine, and the sliding blocks are arranged in the fixing sleeve in a sliding mode. According to the quick fixing mechanism, through exquisite cooperation of a fixing sleeve, a sliding block, a clamping block and a mounting rod, quick mounting and dismounting of the drill bit are achieved, and accurate positioning and rotation prevention of the drill bit in the mounting process are guaranteed through the design of a polygonal adaptive block and an adaptive groove.