Part butt joint hole finish machining positioning device and positioning method

Abstract

The invention discloses a component butt joint hole finish machining positioning device and method, the device comprises a supporting platform, a drill jig frame, a drill jig body, a positioning plug pin and a gap adjusting insertion piece, and the positions of the drill jig frame and the drill jig body are checked through measurement datum points on the drill jig frame and the drill jig body; the aircraft component is hoisted to the position above the fork lug butt joint hole finish machining positioning device, and each fork lug connector is connected with the corresponding drill jig body through an initial hole positioning step plug pin; when final hole machining is conducted on the fork lug connectors, only one fork lug connector can be machined each time, and the relative positions of the other fork lug connectors and the corresponding drill jig body are fixed through the positioning plug pins and the gap adjusting plug pieces; all fork lug joints are machined in sequence; and the end hole positioning step plug pins of all the fork lug connectors are dismounted, and the aircraft component is hoisted away from the butt joint hole finish machining positioning device.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical manufacturing equipment, and in particular to a finishing positioning device and a positioning method for a fork ear docking hole of an aircraft component. Background Art

[0002] In the manufacturing process of modern aircraft, in order to eliminate the accumulated errors caused by positioning and assembly deformation during the assembly process, the method of margin compensation is adopted, that is, after the assembly of parts and components is completed, the surfaces, holes, grooves, skin edges, etc. of the docking parts are reprocessed according to special process equipment to meet the interchange and coordination between parts or certain functional requirements. The fork ears have high matching accuracy and generally multiple sets of fork ears are matched and coordinated with each other, so the assembly accuracy requirements are high.

[0003] When coordination and manufacturing accuracy can meet the docking requirements, the fork ear matching holes are generally processed to the final holes by separate CNC, and then assembled on the combined fixture. After the parts are assembled, the large parts are directly docked. When docking parts with high manufacturing accuracy requirements but low interchangeability requirements, a certain amount of machining allowance is generally reserved for the fork ear matching holes, and the fork ear matching holes are simultaneously machined to the final holes when the large parts are docked. When coordination and manufacturing accuracy cannot meet the docking requirements, a certain amount of machining allowance is reserved for the fork ear matching holes, and the fork ear matching holes are separately machined to the final holes using the same drilling jig before the large parts are docked, and then the large parts are docked.

[0004] When the requirements for the interchangeable coordination and manufacturing accuracy of the fork ears of large aircraft components are high, the accumulated errors formed due to the long error transmission chain for coordination using standard tools do not meet the current situation of direct docking requirements. The fork ear matching holes are separately CNC-machined and a certain machining allowance is reserved. The assembly is completed on the aircraft component assembly jig. Before the large components are docked, the fork ear matching holes are respectively machined to the final holes using the same drill jig, and then the large components are docked. Based on the above process method, the present invention proposes a finishing positioning device for fork ear docking holes. The device integrates the positioning tooling with the finishing drill jig to complete the finishing of the fork ear matching holes, thereby eliminating the accumulated errors in the assembly process and meeting the requirements for interchangeable coordination and high-precision matching of large component docking. Summary of the invention

[0005] The purpose of the present invention is to provide a component fork ear docking hole finishing positioning device and positioning method, in view of the accumulated errors formed due to coordination error transmission, positioning and assembly deformation during the assembly process of aircraft parts. The initial hole of the fork ear docking hole is processed to the final hole before the large parts are docked, so as to eliminate the accumulated errors in the assembly process and meet the requirements of interchangeable coordination and high-precision matching of the docking of large parts.

[0006] A device for fine machining and positioning of a component butt joint hole, wherein the component is provided with a plurality of fork ear joints, and the butt joint holes on all the fork ear joints are in the same plane and parallel to each other, and the device is characterized in that the device comprises a supporting platform, a drilling template frame, a drilling template body, a positioning pin and a gap adjustment plug, wherein the supporting platform is fixed to the floor of the assembly area of ​​the factory building by anchor bolts, the drilling template frame is a surrounding frame structure, the lower surface of the drilling template frame is mounted on the supporting platform, and the upper surface of the drilling template frame is used to install the drilling template body, the drilling template body is an integrated double-ear structure, and the double ears of the drilling template body have two coaxial drilling template holes, the drilling template hole on the outer ear piece is a drilling template guide hole, which matches the diameter of the automatic feed drill hole, and the drilling template hole on the inner ear piece is a positioning hole, and its diameter is smaller than the drilling template guide hole on the outer ear piece, and matches the diameter of the front end pin of the positioning pin, so that The positioning pin is a composite step pin with three different diameter sections, which is used for the connection between the positioning component fork ear joint and the drilling template body. The diameter of the front section pin of the positioning pin matches the aperture of the positioning hole on the drilling template body, the diameter of the rear section pin of the positioning pin matches the aperture of the drilling template guide hole on the drilling template body, and the diameter of the middle section pin of the positioning pin matches the aperture of the docking hole of the component fork ear joint. The diameter of the middle section pin of the positioning pin has two specifications, one specification is the initial hole positioning step pin, in which the section pin diameter matches the initial hole diameter of the docking hole of the component fork ear joint, and the other specification is the final hole positioning step pin, in which the section pin diameter matches the final hole diameter of the docking hole of the component fork ear joint. The gap adjustment plug is a U-shaped plug-in with a handle. The adjustment plug has specifications of different thicknesses and is used to adjust the gap between the component fork ear joint and the drilling template body.

[0007] The device for fine machining and positioning the butt hole of the fork ear joint of a component is characterized in that measurement reference points are provided on the jig frame and the jig body for detecting the relative accuracy of the position of the jig body.

[0008] The component fork ear joint docking hole finishing positioning device is characterized in that a rotating buckle for matching with the automatic feed drill is arranged on the outer ear piece of the drilling jig body around the drilling jig guide hole.

[0009] A method for fine machining and positioning of a fork ear joint butt hole of a component, characterized in that it comprises the following contents: 1) using the above-mentioned fine machining and positioning device for a fork ear joint butt hole of a component; 2) using the measurement reference point of a drilling jig frame to install four sets of drilling jig bodies to theoretical positions; 3) hoisting an aircraft component to the top of the fork ear butt hole fine machining and positioning device, dropping the fork ear joint into the corresponding fork ear of the drilling jig body, and connecting each fork ear joint with the corresponding drilling jig body using the initial hole positioning step pin; 4) using the gap adjustment plug to uniformly adjust the gap between the fork ear joint and the drilling jig body; 5) when the fork ear joint is subjected to final hole machining, only one fork ear joint can be machined at a time, and the remaining fork ear joints and the corresponding drilling jig body are fixed in relative position using the positioning pin and the gap adjustment plug; 6) for the fork ear joint that has been machined, the final hole of the machined fork ear joint is connected to the corresponding drilling jig body using the final hole positioning step pin, and then fixed with the gap adjustment plug, and all the fork ear joints are machined in sequence; 7) removing the final hole positioning step pins of all fork ear joints, and hoisting the aircraft component away from the fine machining and positioning device for the butt hole.

[0010] The beneficial effects of the present application are: 1) the accurate positioning and finishing reaming process of aircraft parts are completed through a finishing device, and the device integrates the positioning tooling and the finishing drilling jig into one, with a high degree of integration.

[0011] 2) The device is used in conjunction with an automatic feed drill during fine machining of the fork ear butt hole, thereby improving the reaming accuracy and work efficiency of the fine machining of the fork ear butt hole.

[0012] 3) The main body of the drilling jig of the device serves as both a connection hole for positioning and a drilling jig hole for the automatic feed drill, solving the problem that the fork ear docking hole is difficult to process due to space limitations.

[0013] 4) The device is simple to set up, easy to use and maintain.

[0014] The present application is further described in detail below in conjunction with the accompanying drawings and implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a finishing positioning device for a component docking hole;

[0016] Figure 2 It is a schematic diagram of the supporting platform structure.

[0017] Figure 3 It is a schematic diagram of the drilling template frame structure.

[0018] Figure 4 It is a schematic diagram of the main structure of the drilling template.

[0019] Figure 5 2. It is a schematic diagram of the positioning pin structure;

[0020] Figure 6 Schematic diagram of the gap adjustment insert structure.

[0021] Explanation of numbers in the figure: 1 support platform, 2 jig frame, 3 jig body, 4 positioning pin, 5 gap adjustment insert, 6 jig guide hole, 7 positioning hole, 8 buckle, 9 front section pin, 10 middle section pin, 11 rear section pin. DETAILED DESCRIPTION

[0022] Referring to the accompanying drawings, the aircraft component involved in the present application has a total of four fork ear joints, and the docking holes on all fork ear joints are in the same plane and parallel to each other. The docking holes on all fork ear joints are in the initial hole state after initial processing, and the initial holes need to be fine-machined to the final hole state.

[0023] According to the requirements of the aircraft components in the embodiment, the present application proposes a component docking hole finishing positioning device, which comprises a support platform 1, a drilling template frame 2, four drilling template bodies 3, four initial hole positioning pins 4, four final hole positioning pins 4, and multiple thickness specification gap adjustment plugs 5. The support platform 1 is a rigid support frame, which is fixed to the floor of the factory assembly area with anchor bolts. The drilling template frame 2 is a frame structure, and the lower surface of the drilling template frame is mounted on the support platform. The drilling template frame 2 is provided with a connecting hole for mounting the drilling template body 3. The drilling template body 3 is an integrated double-ear structure. There are two coaxial drilling template holes on the double ears of the drilling template body 3. The drilling template hole on the outer ear piece is a drilling template guide hole 6, which matches the automatic feed drilling hole diameter. The drilling template hole on the inner ear piece is a positioning hole 7, whose diameter is smaller than the drilling template guide hole 6 on the outer ear piece, and matches the diameter of the front end pin 9 of the positioning pin 4. The positioning pin 4 is a composite step pin containing three different diameter sections, which is used for the connection between the positioning component fork ear joint and the drilling template body 3. The diameter of the front section pin 9 of the positioning pin 4 matches the aperture of the positioning hole 7 on the drilling template body, the diameter of the rear section pin 11 of the positioning pin 4 matches the aperture of the drilling template guide hole 6 on the drilling template body 4, and the diameter of the middle section pin 10 of the positioning pin 4 matches the aperture of the docking hole of the component fork ear joint. The diameter of the middle section pin 10 of the positioning pin 4 has two specifications, one specification is the initial hole positioning step pin, in which the diameter of the section pin 10 matches the initial hole diameter of the docking hole of the component fork ear joint, and the other specification is the final hole positioning step pin, in which the diameter of the section pin 10 matches the final hole diameter of the docking hole of the component fork ear joint. The gap adjustment plug 5 is a U-shaped plug-in with a handle. The adjustment plug 5 has specifications of different thicknesses and is used to adjust the gap between the component fork ear joint and the drilling template body 4.

[0024] In the embodiment, measurement reference points are provided on the jig frame 2 and the jig body 3 for detecting the relative accuracy of the position of the jig body.

[0025] In the embodiment, in order to facilitate the cooperation with the automatic feed drill, a rotating buckle 8 cooperating with the automatic feed drill is provided on the outer ear piece of the drilling jig body 3 around the drilling jig guide hole 6.

[0026] When using the above-mentioned component fork ear joint docking hole finishing positioning device to finish-process and position the component fork ear joint docking hole, first use the measurement reference points on the drill jig frame and the drill jig body to check the position of the drill jig frame and the drill jig body to ensure that they are in the theoretical position under the aircraft coordinate system, and check that the aircraft component fork ear docking hole finishing positioning device is installed correctly so that each fork ear docking hole on the aircraft component corresponds to a drill jig body; then, the aircraft component is lifted above the fork ear docking hole finishing positioning device, and the fork ear joint is dropped into the corresponding fork ear of the drill jig body 3. After each fork ear joint is connected to the corresponding drill jig body 3 using the initial hole positioning step pin, the gap between the fork ear joint and the drill jig body 3 is adjusted evenly using the gap adjustment plug 5. When the fork ear joint is subjected to final hole processing, only one fork ear joint can be processed at a time, and the remaining fork ear joints and the corresponding jig body 3 are fixed in relative position using the positioning pins 4 and the gap adjustment inserts 5; for the fork ear joints that have been processed, the final hole positioning step pin is used to connect the processed fork ear joint final hole with the corresponding jig body 3, and then fixed with the gap adjustment insert 5, and all the fork ear joints are processed in sequence; finally, the final hole positioning step pins of all the fork ear joints are removed, and the aircraft components can be lifted away from the docking hole finishing positioning device.

Claims

1. A component butt hole finishing positioning device, the component is provided with a plurality of fork ear joints, the butt holes on all the fork ear joints are in the same plane and parallel to each other, characterized in that: The device comprises a supporting platform, a drilling template frame, a drilling template body, a positioning pin and a gap adjustment plug. The supporting platform is fixed to the floor of the assembly area of ​​the plant by anchor bolts. The drilling template frame is a frame structure. The lower surface of the drilling template frame is installed on the supporting platform. The upper surface of the drilling template frame is used to install the drilling template body. The drilling template body is an integrated double-ear structure. There are two coaxial drilling template holes on the double ears of the drilling template body. The drilling template hole on the outer ear piece is a drilling template guide hole, which matches the automatic feed drilling hole diameter. The drilling template hole on the inner ear piece is a positioning hole, whose diameter is smaller than the drilling template guide hole on the outer ear piece, and matches the front pin diameter of the positioning pin. The positioning pin is a composite step pin containing three different diameter sections, which is used for positioning. The connection between the component fork ear joint and the drilling jig body, the front pin diameter of the positioning pin matches the aperture of the positioning hole on the drilling jig body, the rear pin diameter of the positioning pin matches the aperture of the drilling jig guide hole on the drilling jig body, the middle pin diameter of the positioning pin matches the aperture of the docking hole of the component fork ear joint, and the middle pin diameter of the positioning pin has two specifications, one specification is the initial hole positioning step pin, in which the segment pin diameter matches the initial hole diameter of the docking hole of the component fork ear joint, and the other specification is the final hole positioning step pin, in which the segment pin diameter matches the final hole diameter of the docking hole of the component fork ear joint. The gap adjustment plug is a U-shaped plug-in with a handle, and the adjustment plug has specifications of different thicknesses and is used to adjust the gap between the component fork ear joint and the drilling jig body.

2. The component fork ear joint butt hole finishing positioning device according to claim 1, characterized in that: The drilling template frame is provided with a measuring reference point for detecting the relative position accuracy of the drilling template body.

3. The component fork ear joint butt hole finishing positioning device according to claim 1, characterized in that: On the outer ear piece of the drilling jig body, a rotating buckle matching the automatic feed drill is arranged around the drilling jig guide hole.

4. A method for fine machining and positioning of a fork ear joint butt hole, characterized in that The invention comprises the following contents: 1) using any one of the fork ear joint butt hole finishing positioning devices as claimed in claims 1 to 3; 2) using the measuring reference points of the jig frame to install four sets of jig bodies to the theoretical positions; 3) lifting the aircraft component to the top of the fork ear butt hole finishing positioning device, dropping the fork ear joint into the corresponding jig body fork ear, and connecting each fork ear joint with the corresponding jig body using the initial hole positioning step pin; 4) using the gap adjustment plug to adjust the gap between the fork ear joint and the jig body to be uniform; 5) when the fork ear joint is subjected to the final hole processing, only one fork ear joint can be processed at a time, and the remaining fork ear joints and the corresponding jig body are fixed in relative position using the positioning pin and the gap adjustment plug; 6) for the fork ear joints that have been processed, the final hole of the processed fork ear joint is connected to the corresponding jig body using the final hole positioning step pin, and then fixed with the gap adjustment plug, and all the fork ear joints are processed in sequence; 7) removing the final hole positioning step pins of all fork ear joints, and lifting the aircraft component away from the butt hole finishing positioning device.

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