CN216180474U

CN216180474U - Special tool for trimming and scribing edge margin of covering skin of opening cover

Info

Publication number: CN216180474U
Application number: CN202122745557.6U
Authority: CN
Inventors: 赵凯; 毕庆鹏; 薛江久; 王环
Original assignee: AVIC Sac Commercial Aircraft Co Ltd
Current assignee: AVIC Sac Commercial Aircraft Co Ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-04-05
Anticipated expiration: 2031-11-10

Abstract

The utility model provides a special tool for trimming and marking the margin of the edge of a covering cap, which comprises a marking head, a rotary adjusting tail handle and a main shaft graduated scale, wherein the rotary adjusting tail handle is connected with the main shaft graduated scale through threads, and the marking head is embedded on the main shaft graduated scale. The main shaft graduated scale is of a cylindrical structure, a working area is arranged between the scribing head and the rotary adjusting tail handle, the size of the working area is adjusted by rotating the rotary adjusting tail handle, a graduation line is carved in the working area, and the zero point position of the graduation line is the central axis position of the scribing head. The front end of the marking head to the main shaft graduated scale is an auxiliary working area, the area is also marked with scale marks, and the zero point of the scale marks is also the position of the central axis of the marking head. The special tool for trimming and marking the margin of the covering of the opening cover can realize accurate marking of the margin of the covering of the opening cover, solve the technical problem that the margin line cannot be accurately determined by traditional marking with a straight steel ruler, and improve the quality and the working efficiency of trimming and marking the margin of the covering of the opening cover.

Description

Special tool for trimming and scribing edge margin of covering skin of opening cover

Technical Field

The utility model belongs to the field of mechanical design, and relates to a special tool for repairing and scribing margin of an edge of a flap skin.

Background

In the assembly and manufacturing process of modern airplanes, process margins are often reserved on cover skins in order to obtain better assembly manufacturability edges, and seam alignment clearance values meeting the requirements of technical documents are finally obtained through trimming margins during actual assembly. In the actual operation process, an operator generally uses a universal vernier caliper or a steel ruler and utilizes a line drawing pen to determine an edge distance reference line and repair an edge line, but the steel ruler or the caliper cannot draw an accurate margin line or a center reference line for installing a bolt for the flap on the flap due to the irregular use of the edge shape, and the repair process often needs to be disassembled, assembled and debugged for multiple times to meet the final engineering requirements (namely, the seam clearance value and the edge distance line of the flap bolt meet the requirements). The operation flow has the defects of uneven butt seam gap value and bolt edge distance value after repair, and low working efficiency due to repeated disassembly and assembly. The tool and the method for repairing and marking the margin of the covering of the opening cover provide a tool and a method for quickly and accurately marking, and improve the product repairing quality and the operation efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a special tool for repairing and scribing the margin of the skin edge of a covering cap, which is mainly applied to the field of assembly and manufacturing of modern airplanes, in particular to a special tool for precisely and quickly scribing the margin to be removed of the edge of the covering cap or the margin line of a bolt for fixing the covering cap by aiming at the problem of repairing and scribing the processing margin left at the edge of the covering cap.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a tool for trimming and marking the margin of the edge of a special cover skin comprises a marking head 2, a rotary adjusting tail handle 1 and a main shaft graduated scale 3. The rotation adjusting tail handle 1 is in threaded connection with the spindle graduated scale 3, and the scribing head 2 is embedded on the spindle graduated scale 3. The main shaft graduated scale 3 is of a cylindrical structure, an external thread is arranged at one end of the main shaft graduated scale connected with the rotary adjusting tail handle 1, and an internal thread is arranged on the rotary adjusting tail handle 1.

The main shaft graduated scale 3 is a working area between the scribing head 2 and the rotary adjusting tail handle 1, the size of the working area is adjusted by rotating the rotary adjusting tail handle 1, the area is marked with a graduation line, and the zero point position of the graduation line is the central axis position of the scribing head 2. The front ends of the marking head 2 and the main shaft graduated scale 3 are auxiliary working areas, the auxiliary functions comprise two functions of reference positioning and working supporting, the areas are also marked with scale marks, the zero points of the scale marks are also the positions of the central axis of the marking head, and the tool structure can refer to the attached drawing 1.

The scribing head 2 is made of metal, the tip of the scribing head 2 is similar to a spherical shape and has a spherical structure, so that the scribing head can not only perform the scribing purpose, but also avoid scratching the parts.

The utility model has the beneficial effects that: the special tool for trimming and marking the margin of the covering of the opening cover can realize accurate marking of the margin of the covering of the opening cover, solve the technical problem that the margin line cannot be accurately determined by traditional marking with a straight steel ruler, and improve the quality and the working efficiency of trimming and marking the margin of the covering of the opening cover.

Drawings

FIG. 1 is a schematic view of a tool configuration;

FIG. 2 is a front view of the tool configuration;

FIG. 3 is a cross-sectional view taken along the plane A-A of FIG. 2;

FIG. 4 is a schematic view of the working principle

In the figure: 1, rotating and adjusting a tail handle; 2, marking off a head; 3, a main shaft graduated scale; 4, a region to be repaired; 5 covering the cover with a cover; 6 fixing the structure.

Detailed Description

The present invention is further illustrated by the following specific examples.

A tool for trimming and marking the margin of the edge of a special cover skin comprises a marking head 2, a rotary adjusting tail handle 1 and a main shaft graduated scale 3. The rotation adjusting tail handle 1 is in threaded connection with the spindle graduated scale 3, and the scribing head 2 is embedded on the spindle graduated scale 3. The main shaft graduated scale 3 is of a cylindrical structure, an external thread is arranged at one end of the main shaft graduated scale connected with the rotary adjusting tail handle 1, and an internal thread is arranged on the rotary adjusting tail handle 1. The main shaft graduated scale 3 is a working area between the marking head 2 and the rotary adjusting tail handle 1, the area is marked with graduation lines, and the zero point position of the graduation lines is the central axis position of the marking head 2. The front ends of the marking head 2 and the main shaft graduated scale 3 are auxiliary working areas, the auxiliary functions comprise two functions of reference positioning and working supporting, the areas are also marked with scale marks, the zero points of the scale marks are also the positions of the central axis of the marking head, and the tool structure can refer to the attached drawing 1.

The end face of the tool rotation adjusting tail handle 1 is defined as a datum A, the corresponding edge of the butt seam of an airplane fixed structure (such as a fixed opening frame or a fixed covering) and a detachable cover covering is defined as a datum B, the other edge of the fixed structure is positioned as a datum C, and the datum can refer to the attached figure 4 (note that the datum B and the datum C on the fixed structure need to be selected according to an actual state, because the position of the datum C in the actual state is possibly far away from the datum C, the use range of the tool is exceeded, and necessary calculation needs to be carried out when the datum C is used so as to determine the gap value of a position to be repaired).

In actual repair operation, an end face (reference A) of a tool rotation adjusting tail handle 1 is attached to or aligned with an edge (reference B or reference C) of a fixed structure, wherein the attached figure 4 shows a working state that the reference A and the reference C are attached, the dimension from the fixed structure reference B to the reference C is subtracted from the distance from a scribing head 2 to the rotation tail handle (reference A) in operation, the amount of a covering cover needing to be repaired can be calculated through a final allowed target gap value, a numerical value is fixed after the tail handle 1 is rotated, at the moment, the scribing head moves along the edge (reference covering cover C) of the fixed structure, and a margin trajectory line is scribed on the covering cover by the scribing head, namely, the margin of the covering needing to be repaired is determined (a red line frame section line area in the attached drawing); and in the other working state, if the marking is carried out according to the alignment of the reference A and the reference B, calculation is not needed, only the rotation adjustment tail handle is fixedly rotated according to the target gap value, the alignment of the end surface (the reference A) and the edge of the fixed structure (the reference B) is kept, and the movement along the reference B edge is carried out, so that the allowance track line needing to be repaired can be obtained on the cover skin of the flap. In practical operation, selection principles of the reference B and the reference C need to be selected according to practical conditions, and after the method is used for repairing, the purpose that the butt seam gap between the edge of the fixed skin and the cover skin meets the requirement can be achieved. The working principle diagram refers to fig. 4.

In addition, two points need to be explained: the first point is that the principle of the line of the center edge distance of the bolt of the opening drawing cover is the same as the principle and method of the line of the process allowance of the covering drawing cover, and only a proper reference needs to be selected; the second point, the function of the graduation marks on the auxiliary working area of the spindle graduated scale 3, is mainly used for auxiliary reference positioning, and the spindle graduated scale 3 is cylindrical in shape for the purpose that the tool has better smoothness and does not cause damage to the part when moving along the edge where the reference B or C is located.

The above-mentioned embodiments only express the embodiments of the present invention, but not should be understood as the limitation of the scope of the utility model patent, it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the concept of the present invention, and these all fall into the protection scope of the present invention.

Claims

1. A tool for trimming and marking the margin of the edge of a special cover skin is characterized by comprising a marking head (2), a rotary adjusting tail handle (1) and a main shaft graduated scale (3); the rotary adjusting tail handle (1) is in threaded connection with the main shaft graduated scale (3), and the marking head (2) is embedded on the main shaft graduated scale (3);

the main shaft graduated scale (3) is of a cylindrical structure, a working area is arranged between the marking head (2) and the rotary adjusting tail handle (1), the size of the working area is adjusted by rotating the rotary adjusting tail handle (1), scale marks are marked in the working area, and the zero point position of the scale marks is the central axis position of the marking head (2); the front end of the marking head (2) to the main shaft graduated scale (3) is an auxiliary working area, the auxiliary function comprises two functions of reference positioning and working supporting, the area is also marked with scale marks, and the zero point of the scale marks is also the central axis position of the marking head.

2. The tool for trimming and marking the margin of the skin edge of the dedicated flap according to claim 1, wherein the marking head (2) is made of metal, and the tip of the marking head (2) is similar to a sphere.