JPH0327323B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention uses a portable drilling machine such as an electric drill or an air drill to drill holes such as joints between two-dimensionally or three-dimensionally curved aircraft parts. The present invention relates to a drilling jig used for precision drilling at a constant pitch in stacked curved members.

[Conventional technology]

The methods of "fastener drilling, fastener insertion, and fastener joining" are often used in the assembly of general aircraft, but most of these methods are still done manually, and the drilling work depends on technical requirements or processing conditions. In cases where at least one of the following applies, a drilling jig is usually used.

(a) The material of the stacked curved member is hard.

(b) The total thickness of the stacked curved members is large.

(c) At least one of the hole pitch tolerance, hole diameter tolerance, or hole perpendicularity to the plate surface is extremely small.

(d) The pore diameter is approximately 1/4 inch or more.

Such a drilling jig is shown in FIGS. 13 and 14.
As shown in the figure, an anchor bush type perforation plate 3 is made up of a template 1 in which holes 1a corresponding to the diameter of the perforation are drilled at a constant pitch, and anchor bushes 2 for guiding the drill in cooperation with the holes are riveted. Alternatively, as shown in FIG. 15, a resin-shaped perforated plate 5 molded from synthetic resin with bushes 4 embedded therein is used.

[Problem that the invention seeks to solve]

However, the anchor bush-shaped perforated plate 3 has low rigidity even if it is curved in advance so that it fits tightly against the convex surface of the stacking curved member, and the anchor bush 2 is riveted to the template 1. This results in the problem that not only is it difficult to improve the perpendicularity between the plate surface and the hole, but also that chips are difficult to escape during drilling, making it difficult to improve drilling accuracy. Furthermore, the resin-shaped perforated plate 5 requires a master model 6 for its molding, but it cannot be manufactured if there is no master model equipped with the mold surface 6a, and even if it is attempted to be manufactured from the model line 7a of the curved member 7, If the offset amount H from the model line 7a is large, manufacturing is difficult.
In addition, it is difficult for chips to escape during drilling, making it difficult to improve drilling accuracy, which is the same as in the case of perforated plate 3, but it also requires a large amount of man-hours and time to manufacture the perforated plate, and avoids dimensional errors due to aging of the resin. I can't.

Moreover, it is clear that any perforated plate cannot accommodate changes in the degree of curvature of stacked curved members, and even if the hole diameter and hole pitch are the same, if the degree of curvature of stacked curved members differs, a drilling jig must be manufactured for each case. I have to.

[Means for solving problems]

The present invention deals with this problem, and is a drilling jig that is attached to a stacked curved member in which pilot holes are bored perpendicularly to the plate surface at a substantially constant pitch, under the legs of both ends of the top plate that supports the slide bush. Inverted U-shaped links and flat links, each having a connecting pin hole at each end, are alternately connected with pins so as to be bendable in a plane including the axis of the sliding bushing, so that both ends of each flat link are connected. A perforated band in which the pin holes of the pin connecting parts located on the same side of the pin connecting parts are formed into long holes in the longitudinal direction of the flat link, and the stacking curved member and the pilot hole are respectively fitted and inserted. The present invention is characterized by a combination of a bushing positioning pin that slidably passes through the insertion and removal bushings of each inverted U-shaped link, and temporary fixing means that can externally fix each flat link to the stacking curved member. [Function] According to the above structure, the perforated strips are placed as shown in FIG. 1 on the stacked curved members that are closely fixed to each other by appropriate means and have prepared holes perpendicular to the plate surface. By sequentially inserting the button positioning pins into the insertion bushes of the inverted U-shaped link and the corresponding pilot holes on the side of the stacking curved member, each slider bushing is positioned perpendicular to the plate surface of the stacking curved member.

Therefore, each flat link is pressed against the stacking curved member side, and the connection pins at both ends are not on the circumscribed plane F of the stacking curved member, the tolerance of the pilot hole pitch, or slight variation in the pilot hole pitch, etc. After circumscribing the flat link to the stacking curved member while absorbing variations in the length of the flat link by the engagement portion between the long hole in the longitudinal direction of the link and the pin at one end, the flat link is clamped with a C clamp ( If the inverted U-shaped link is fixed to the stacking curved member by pressure contact with any temporary fixing means such as a one-sided tightening tool or a one-sided tightening tool, one end of each inverted U-shaped link can be attached to the flat link fixed to the stacking curved member. is pivotally attached to the corresponding end by a pin, and the other end of the inverted U-shaped link is supported by the end of the corresponding fixed plate-like link through engagement between the long hole in the longitudinal direction of the link and the pin. Even if the bush positioning pin is removed from the slide bush and the pilot hole, each inverted U-shaped link is fixedly supported by the stacking curved member via the flat links at both ends thereof.

Therefore, it is possible to drill through the pilot hole while guiding the drill of the portable drilling machine with the slider bushing, or to precisely drill the pilot hole to a slightly larger predetermined diameter by replacing the slider bushing. [Example] As shown in Fig. 9 below, the tail wing outer plate (curved member) 7 made of carbon fiber reinforced plastic and the mounting bracket 8 (curved member) made of aluminum alloy are stacked on top of each other and precisely arranged at a constant pitch. An illustrated embodiment applied to the case of making a hole 9 will be described. As shown in FIGS. 6 to 8, the perforated belt connects inverted U-shaped links 10 and flat links 11 alternately with pins 12, and connects only the pin hole at the right end of each flat link to the link. It is constituted by a long hole 13 in the longitudinal direction. The inverted U-shaped link 10 has a liner bushing 1 on its top plate.
4 is press-fitted and fixed, and the liner bush 1
A screw hole 16 is bored into which a set screw (not shown) of the slide-out bushing 15 (FIG. 1) inserted into the top plate is screwed, and a leg 10a having a fork-shaped lower end is integrated at both ends of the top plate. The end of a flat link 11 is connected within the fork-shaped portion at the lower end of each leg by a pin 12 inserted into a round pin hole of the leg.

Therefore, the perforated bands 10 and 11 are bendable within the plane O-O that includes the axis of each liner bush 14 or slide bush 15, and the long axis is located at the center of each flat link 11. A long hole 17 located on the plane OO is bored.

Reference numeral 18 indicates pilot holes drilled in three rows at a constant pitch in the curved member 8. When drilling the pilot holes 18, the first
As shown in FIG.
0 to form a punch hole 8b in the joint surface, and then, as shown in FIG. 11, a drill 21 of a drilling machine is engaged with each punch hole 8b to make a hole perpendicular to the joint surface 8a. Also, the corresponding prepared hole 22 on the side of the curved member 7
is a stacked curved member 7 closely fixed by appropriate means,
As shown in FIG. 12, a hand-type drilling plate or a slide bushing 23 is tightly fitted into the pilot hole 18 of No. 8, and the hole is drilled while guiding the drill 24 of the portable drilling machine.

Therefore, the diameter of the pilot hole 22 is smaller than that of the pilot hole 18, so the bush positioning pin 25 is inserted into the pilot hole 22.
As shown in FIG. 1, a large diameter portion that tightly fits into the pilot hole 18 and the slide bushing 15 is provided above a small diameter portion that tightly fits into the lower hole 18 and the slide bushing 15.

The temporary fixing means is shown using a one-sided tightening tool 26 that can be inserted into the elongated hole 17 and the lower holes 18 and 22 from above, and the tightening tool 26 is attached to a wing nut 27.
By forward and reverse operations, the plurality of engaging claws 28 are moved against the fixed mandrel 29 so that the hook portions at the tips of the engaging claws are aligned with the pilot holes 22.
1, and a tightening position where the flat link 11 is pressed against the stacking curved members 7 and 8 by engaging the edge of the hook portion lower hole 22 It consists of a conventionally well-known configuration.

This structure of the temporary fixing means is because the edges of the elongated hole 17 on both sides of the plane O-O in FIG.
Even if the surface is a dimensional curve, tilting of the axis of the liner bush 14 or slide bush 15 within the vertical plane A-A orthogonal to the plane O-O is reliably prevented, and the curved member 7 is This is due to the fact that you can't put your hand down. Therefore, it is clear that if the underside of the bending member 7 is accessible, the fastener 26 can be a normal bolt and nut fastener.

In this way, the slide bush 15 is inserted into the perforated band 10,1.
1, the bush positioning pin 25 is removed from the slide bush 15, and while the drill 30 of the portable drilling machine is guided by the slide bush 15, the second Drill a pilot hole 18 through the curved member 7 as shown in the figure, then replace the slide bushing 15 with a slide bush 31 for drilling the reamer pilot hole, which has a slightly larger inner diameter as shown in Figure 3, and make it portable. Drill through the reamer lower hole 33 with the drill 32 of the drilling machine, then replace the slide bush 31 with a slide bush 34 for reaming as shown in Figure 4, and drill the hole with the reamer 35 of the portable drilling machine. Finish to 9.

When every other hole 9 has been finished in this way, the slide-out bushing 34 of each inverted U-shaped link is replaced with the slip-off bush 15, the tightening tool 26 is removed, and the remaining pilot holes 18 are removed as shown in FIG. , 22 and slide button 15
The bushing positioning pin 25 is inserted into the spacer 37, and the spacer 37 having the same hole 36 as the pilot hole 22 is used to circumscribe and fix each flat link 11 to the stacking curved members 7 and 8 with the tightening tool 26, as described above. Repeat the steps to finish the pilot holes 18 and 22 into the hole 9.

In addition, in continuous drilling work, the button positioning pin 2
5 at any part of the position, the first
It is efficient to perform the operations shown in Figures 4 to 4.

Although one embodiment has been described above, in order to cope with large variations in hole pitch, adjacent inverted U-shaped links 11 are , 10 are preferably connected with pins.

〔Effect of the invention〕

According to the present invention, the insertion bushing of each inverted U-shaped link and the bush positioning pin inserted into the lower hole of the stacking curved member guide the insertion bushing perpendicularly to the plate surface of the stacking curved member. This allows each flat link to be fixed externally to the stacking curved member, and even if the bushing positioning pin is removed, the inverted U-shaped links between adjacent flat links are fixed and supported in that position. Since the connecting pin holes on the same side of each flat link are formed into elongated holes in the longitudinal direction of the link, regardless of the variation in the degree of curvature of the stacked curved member in the plane including the axis of each prepared hole, Not only can a portable drilling machine be used to precisely drill holes perpendicular to the plate surface, but changes in hole diameter can also be accommodated by replacing the slide bushing, and slight variations in hole pitch can be absorbed by the long holes. Moreover, since the space between the slide bush and the pilot hole is open, chips can easily escape, and precision drilling can be performed without interrupting the drilling operation.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional front view when the perforated belt is installed (No. 9
(A sectional view corresponding to the XX section in the figure or the Y-Y section in FIG. Figures 6 and 7 are a vertical front view and a plan view of the perforated belt, respectively, Figure 8 is a Z-Z sectional view of Figure 6, and Figure 9 is a stacked curved view. A perspective view of the member, FIGS. 10 to 12 are cross-sectional views showing a method for drilling a pilot hole, FIGS. 13 and 14 are a front view and a plan view, respectively, of a conventional anchor bush type perforation plate.
FIGS. 15 and 16 are a longitudinal sectional front view and a longitudinal sectional side view of a conventional resin-type perforated plate and a longitudinal sectional side view of the conventional resin-shaped perforated plate when it is attached to a stacking curved member, respectively. 7, 8... Stacked curved member, 10... Inverted U-shaped link, 11... Flat link, 12... Pin, 1
3...Long hole, 15...Slip button, 18, 22
... Pilot hole, 25 ... Button positioning pin, 26
...Tightening device.

Claims (1)

[Scope of Claims] 1. A drilling jig that is attached to a stacked curved member in which pilot holes are bored perpendicularly to the plate surface at a substantially constant pitch,
The lower ends of the legs at both ends of the top plate that supports the slide bushing are alternately inverted U-shaped links and flat links each having a connecting pin hole, and the pins are bent freely within a plane that includes the axis of the slide bush. A perforated band that is connected to each other and has a pin hole in a pin connecting portion located on the same side of the pin connecting portions at both ends of each flat link formed into a long hole in the longitudinal direction of the flat link, and a stacked curved member. A bushing positioning pin that is fitted and inserted into the pilot hole of each inverted U-shaped link and slidably passes through the insertion and removal bushing of each inverted U-shaped link, and a temporary fixing means that can externally fix each flat link to the stacking curved member. A flexible drilling jig characterized by a combination of. 2. The temporary fixing means is formed by drilling a pilot hole in the stacking curved member at the center between the adjacent bush positioning pins inserted into the pilot hole of the stacking curved member, and a corresponding hole in the flat link. The flexible drilling jig according to claim 1, comprising a one-sidedly operated tightening tool that passes through a long hole provided therein.