Self-expanding drill jig

Abstract

The invention relates to a self-expansion drill jig which comprises a stud, an extrusion part and a drill jig body, and a circular boss is mounted on the stud; the extruding piece is of a frustum structure, and a groove is formed from the lower end face of the extruding piece to the interior of the extruding piece and used for assembling the circular boss of the stud; the circular boss is assembled in the groove of the extruding piece, and the lower end of the stud penetrates through the through hole in the extruding piece; the drill jig body is of a flange-shaped structure, a through circular hole is formed in the central axis direction, and the upper end of the stud penetrates through a center hole of the drill jig body and is provided with a nut. The upper portion of the drill jig body is a disc, the lower portion of the drill jig body is a cylindrical locking table which is coaxially arranged, and a conical locking cavity is formed in the locking table. Equal-division round holes are formed in a disc of the drill jig body in the circumferential direction, and linings are pressed into the round holes and used for drilling flange plate fixing holes in the aircraft structural part. And a clamping device is arranged on the upper surface of the disc above the drill jig body, is matched with the level bubble in shape and is used for fixing the level bubble. The method is high in accuracy, high in stability and simple to operate.

Description

Technical Field

[0001] The invention belongs to the field of aviation technology, and in particular relates to a self-expanding drilling jig and a use method thereof. Background Art

[0002] The ducts installed on aircraft wings are of many types, large in number, and complex in shape. In order to reduce the problem of duct scrapping due to incoordination during duct installation, the duct matching method is often used in the actual assembly process to ensure the coordination of the ducts. Although the duct matching method solves the problem of incoordination in on-site duct assembly, it also restricts the on-site production progress. The delivery node of the whole machine is often delayed due to the failure to deliver the sampling duct in time. Summary of the invention

[0003] The invention provides a self-expanding drilling jig, which is used to overcome the difficulty of making a conduit on site due to the inconsistency of hole position states after making holes on various frames when making flange fixing holes on aircraft structural parts.

[0004] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0005] A self-expanding drilling jig comprises a stud, an extrusion piece and a drilling jig body, wherein:

[0006] A circular boss is installed on the stud; the extrusion piece is a cone structure, and a groove is opened from the lower end surface of the extrusion piece to the inside thereof for assembling the circular boss of the stud; the circular boss is assembled into the groove of the extrusion piece, and the lower end of the stud passes through the through hole on the extrusion piece;

[0007] The drilling template body is a flange-shaped structure with a circular hole penetrating in the direction of the central axis. The upper end of the stud passes through the central hole of the drilling template body and is installed with a nut. The upper part of the drilling template body is a disc, and the lower part is a coaxially arranged cylindrical locking platform, and a conical locking cavity is opened on the locking platform.

[0008] The disc of the drilling template is provided with equally divided circular holes along the circumferential direction, and bushings are pressed into the circular holes for drilling flange fixing holes on aircraft structural parts;

[0009] A clamp is arranged on the upper surface of the disc above the drilling template body. The clamp matches the shape of the vial and is used to fix the vial.

[0010] Furthermore, the locking platform is a multi-section spliced ​​structure with slots between adjacent sections.

[0011] Furthermore, when the squeezing member is assembled into the locking cavity and the squeezing member is driven to move, the squeezing member expands the locking platform outward.

[0012] Furthermore, the inner diameter of the locking cavity is smaller at the top and larger at the bottom.

[0013] Furthermore, a cut angle is provided at the junction of the circular disc of the drilling template body and the locking platform to adapt to the changes when the locking platform is expanded.

[0014] Furthermore, the axis of the vial is perpendicular to the radial direction of the disk of the drilling template.

[0015] Furthermore, the locking platform at the bottom of the drilling template is placed in the circular hole of the aircraft structure, and then the extrusion piece is installed from bottom to top into the locking cavity of the locking platform, and the stud is passed through the through hole on the extrusion piece and the center hole of the drilling template, and a circular boss is assembled at the lower end of the stud, so that the circular boss is screwed into the groove of the extrusion piece, and then a nut is assembled at the upper end of the stud.

[0016] Furthermore, the drill template is rotated to observe the level bubble until the level bubble reaches a horizontal position, and the nut is rotated to move the extrusion piece upward in the locking cavity, thereby opening the locking platform so that the drill template is fixed to the circular hole of the aircraft structure; then a hole is made on the surface of the aircraft structure through the bushing on the drill template disc.

[0017] Compared with the prior art, the present invention has the following technical features:

[0018] The present invention provides a self-expanding drilling jig and method, which has a simple structure, is easy to operate, and is lightweight and flexible. The positioning accuracy of the drilling jig is improved by adding a level bubble to the drilling jig. At the same time, the drilling jig itself and the aircraft structural parts have a locking function to prevent the position of the drilling jig from changing due to vibration when the handheld drilling jig is used to make holes, thereby ensuring that the hole-making state of the products is consistent during mass production, reducing the number of catheters currently equipped, and achieving the purpose of shortening the equipment cycle of catheter manufacturing, reducing manufacturing costs, and improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Three-view and isometric view of self-expanding drilling jig;

[0020] Figure 2 Sectional view of self-expanding drilling jig;

[0021] Among them: 1 stud, 2 nut, 3 bushing, 4 aircraft structure part, 5 extrusion part, 6 level bubble, 7 drilling template, 8 clamp, 9 circular boss, 10 groove, 11 disc, 12 locking platform, 13 locking cavity, 14 circular hole, 15 circular hole, 16 cut corner. DETAILED DESCRIPTION

[0022] The present invention provides a self-expanding drill jig. Under the action of extrusion force, the drill jig becomes larger in shape and fits closely with aircraft structural parts, avoiding the deviation of hole positions caused by vibration when drilling holes with the drill jig. The level bubble added to the drill jig assists in drilling jig positioning, effectively improving the hole drilling accuracy and reducing the number of flanged conduits that need to be produced on site.

[0023] Referring to the accompanying drawings, a self-expanding drilling template provided by the present invention includes a stud 1, a nut 2, a bushing 3, an extrusion 5, a level bubble 6, a drilling template body 7, and a clamp 8, wherein:

[0024] A circular boss is installed on the stud 1; the squeeze piece 5 is a frustum structure, and a groove 10 is opened from the lower end surface of the squeeze piece 5 to the inside thereof, for assembling the circular boss 9 of the stud 1; the circular boss is assembled into the groove of the squeeze piece 5, and the lower end of the stud 1 passes through the through hole on the squeeze piece 5;

[0025] The drilling template body 7 is a flange-shaped structure with a circular hole passing through in the direction of the central axis. The upper end of the stud 1 passes through the central hole of the drilling template body 7 and is installed with a nut 2. The upper part of the drilling template body 7 is a disc 11, and the lower part is a coaxially arranged cylindrical locking platform 12, and a conical locking cavity 13 is provided on the locking platform; wherein the locking platform is a multi-section splicing structure, and there are slots between adjacent sections; after the extrusion member 5 is assembled into the locking cavity and the extrusion member 5 is driven to move, the extrusion member 5 expands the locking platform outward, extruding the inner wall of the circular hole 14 of the aircraft structure 4, thereby playing a tightening role; wherein the slot can adapt to the expansion of the locking platform;

[0026] A 60° equally divided circular hole 15 is opened on the circular disc of the drilling template body 7 along the circumferential direction, and a bushing 3 is pressed into the circular hole for drilling the flange fixing hole on the aircraft structure 4; the service life of the drilling template is improved by installing the bushing 3; wherein the inner diameter of the locking cavity is smaller at the top and larger at the bottom; a cut angle 16 is set at the junction of the circular disc of the drilling template body 7 and the locking platform to adapt to the changes when the locking platform is expanded;

[0027] A clamp 8 is provided on the upper surface of the disk above the drilling template body 7. The clamp 8 matches the shape of the vial 6 and is used to fix the vial 6. The axis of the vial 6 is radially perpendicular to the disk of the drilling template body 7.

[0028] When in use, the locking platform at the bottom of the drilling template 7 is placed into the circular hole of the aircraft structure 4, and then the extrusion piece 5 is installed from bottom to top into the locking cavity of the locking platform, and the stud 1 is passed through the through hole on the extrusion piece 5 and the center hole of the drilling template 7, and the circular boss is assembled at the lower end of the stud 1, so that the circular boss is screwed into the groove of the extrusion piece 5, and then the nut 2 is assembled at the upper end of the stud 1;

[0029] Slowly rotate the drilling template 7 and observe the spirit bubble 6 until the spirit bubble reaches a horizontal position, rotate the nut 2 to move the extrusion piece 5 upward in the locking cavity, open the locking platform, and fix the drilling template 7 to the circular hole of the aircraft structure 4; then make a hole in the surface of the aircraft structure 4 through the bushing 3 on the disc of the drilling template 7.

[0030] This invention solves the problem of inconsistent installation of the conduit due to the inconsistency between the conduit with the flange and the structural opening, reduces the number of conduits to be equipped, and achieves the purpose of shortening the conduit manufacturing equipment cycle, reducing manufacturing costs and improving assembly efficiency. The invention has achieved very good results in actual application, with high accuracy, strong stability and simple operation.

Claims

1. A self-expanding drilling template, characterized in that: It includes studs, extrusions and jigsaw bodies, wherein: A circular boss is installed on the stud; the extrusion piece is a cone structure, and a groove is opened from the lower end surface of the extrusion piece to the inside thereof for assembling the circular boss of the stud; the circular boss is assembled into the groove of the extrusion piece, and the lower end of the stud passes through the through hole on the extrusion piece; The drilling template body is a flange-shaped structure with a circular hole penetrating in the direction of the central axis. The upper end of the stud passes through the central hole of the drilling template body and is installed with a nut. The upper part of the drilling template body is a disc, and the lower part is a coaxially arranged cylindrical locking platform, and a conical locking cavity is opened on the locking platform. The disc of the drilling template is provided with equally divided circular holes along the circumferential direction, and bushings are pressed into the circular holes for drilling flange fixing holes on aircraft structural parts; A clamp is arranged on the upper surface of the disc above the drilling template body. The clamp matches the shape of the vial bubble and is used to fix the vial bubble.

2. The self-expanding drilling template according to claim 1, characterized in that: The locking platform is a multi-section splicing structure with slots between adjacent sections.

3. The self-expanding drilling template according to claim 1, characterized in that: When the squeeze piece is assembled into the locking cavity and driven to move, the squeeze piece expands the locking platform outward.

4. The self-expanding drilling template according to claim 1, characterized in that: The inner diameter of the locking cavity is smaller at the top and larger at the bottom.

5. The self-expanding drilling template according to claim 1, characterized in that: A cut angle is set at the junction of the circular disc of the drilling template and the locking platform to adapt to the changes when the locking platform is expanded.

6. The self-expanding drilling template according to claim 1, characterized in that: The axis of the level bubble is perpendicular to the radial direction of the circular disk of the drilling template.

7. The self-expanding drilling template according to claim 1, characterized in that: Place the locking platform at the bottom of the drilling template into the circular hole of the aircraft structure, then install the extrusion piece into the locking cavity of the locking platform from bottom to top, pass the stud through the through hole on the extrusion piece and the center hole of the drilling template, and assemble the circular boss at the lower end of the stud so that the circular boss is screwed into the groove of the extrusion piece, and then assemble the nut at the upper end of the stud.

8. The self-expanding drilling template according to claim 1, characterized in that: Rotate the drill template and observe the level bubble until it reaches a horizontal position, rotate the nut to move the extrusion piece upward in the locking cavity, open the locking platform, and fix the drill template to the circular hole of the aircraft structure; then make a hole on the surface of the aircraft structure through the bushing on the drill template disc.

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