JP2005161452A - Boring method of plate material and boring tool of plate material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately bore a rivet shaft hole in a plate joined to a plate already bored with a countersunk rivet hole including a countersunk part. <P>SOLUTION: This boring tool has a guide plate material fixing process 300 of fixing two plate materials by being positioned by the countersunk part and a prepared hole by boring the prepared hole in the plate materials bored with a hole including the countersunk hole and joined with a guide plate material being the joining one plate material as a guide, a hole boring template fixing process 600 of fixing a hole boring template provided with a hole for fitting a guide bush for guiding a drill in layers by aligning the drill center with the prepared hole center, and a regular hole boring process 800 of boring the rivet shaft hole by being guide by the guide bush. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a plate material drilling method for drilling a plate material such as metal using a drilling tool for fastening with a dish rivet, and a plate material drilling tool. The present invention relates to a drilling method and a drilling tool used when a shaft hole is drilled in a new plate material based on a plate material having the above.

  2. Description of the Related Art Conventionally, a plate rivet that forms a countersink hole in an outer plate and makes a rivet head flush with the surface of the outer plate is used for joining the outer plates used in an aircraft or the like. In rivet connection, if the centers of the rivet holes on each plate are not aligned precisely, the cracks that start from the rivet holes due to rattling of the connection part or excessive load on the connection part when using an aircraft, etc. May occur.

  As a drilling method for accurately determining the hole position, a transparent guide plate material showing the drilling position is superimposed on the work plate material to be drilled, and a cutting tool such as a drill is applied to the guide plate material and the work plate material at the drilling position. What penetrates is known (for example, refer to Patent Document 1). However, this drilling method is effective when the surface of the work plate is flat, but when the surface is curved like an outer plate of an aircraft or the like, the guide plate is accurately overlapped. It is extremely difficult to form the hole in the work plate material so as to extend in the normal direction.

As a drilling method that eliminates this problem, a substantially cylindrical guide bush is fitted into a hole drilled in one of the plates to be joined, and the drill is guided by a guide hole provided in the guide bush to reduce the size of the other plate. It is known that a hole is perforated and a guide shaft provided at the tip is inserted into the small hole and guided to perforate the main hole.
Japanese Utility Model Publication No. 5-44407

However, in the above drilling method, the guide bush is fitted into the drilled hole and fixed by hand, so that the guide bush is not securely fixed during drilling and is formed on the work plate by the cutting tool. There is a problem that the accuracy of the hole is deteriorated.
In addition, when the cutting tool rotates during drilling, the guide bushing vibrates because the guide bushing is not fixed securely, so an excessive load is applied around the guide hole of the guide plate material. Thereby, the periphery of the guide hole of the guide plate material is deformed relatively early, and there is a problem that the reliability and durability of the guide plate material cannot be sufficiently ensured.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a plate material drilling method and a plate material drilling tool which can accurately drill holes and improve the reliability durability of rivet connections. There is.

  In order to achieve the above object, in the invention described in claim 1, a rivet hole having a countersunk hole and a shaft hole having a constant diameter is formed in one plate material fastened by a countersunk rivet. A plate drilling method for drilling a shaft hole having a constant diameter on the other plate so as to coincide with the central axis, the guide for guiding a drill to the center of a cylinder having an outer diameter in contact with the dish surface of the dish hole portion A guide bush preparation step of forming a cylinder by providing a hole and forming a guide cylinder by forming a small cylindrical portion that fits into the shaft hole when the cylinder comes into contact with the dish surface at the tip thereof; A plate material fixing step in which the one plate material and the other plate material are stacked and fixed; and a guide bush fixing step in which the small cylindrical portion is fitted in the shaft hole portion and the cylinder is brought into contact with the plate surface and fixed. , Guide the drill through the guide hole Characterized in that and a piercing step of piercing to the other plate.

  According to the first aspect of the present invention, in the state in which the guide bush is positioned with respect to the one plate material in the guide bush fixing step, the other plate material is perforated by the drill guided by the guide bush. The Here, when the guide bush is positioned, if the guide bush is moved to one plate material side, the small cylindrical portion of the guide guide bush is first fitted into the shaft hole portion, so that the guide bush is positioned almost accurately. . When the guide bush is pressed to one plate material side, the cylinder of the guide bush comes into contact with the dish surface in the circumferential direction, so that the center axis of the guide bush is positioned so as to substantially coincide with the center axis of the guide hole. The

  Therefore, it is possible to perform drilling with high accuracy using a drill by using the guide bush positioned accurately. Further, since the guide bush is stably fixed to the guide plate material, the guide plate material guide bush does not vibrate excessively during the drilling process, and the other plate material can be drilled with high accuracy. Furthermore, since the vibration of the guide bush is suppressed, wear due to wear of the guide bush and one plate material can be reduced, and the reliability durability of the guide bush, one plate material, and the like can be improved.

  According to a second aspect of the present invention, in the method for perforating a plate material according to the first aspect, the guide bush is provided with a handle extending radially outward and substantially symmetrical about a central axis, and the perforating step. Then, the drilling is performed in a state where a load to the one plate material side is applied to the handle of the guide bush.

  According to the second aspect of the present invention, in addition to the action of the first aspect, when a load is applied to the handle of the guide bush toward the one plate member, the guide bush comes into close contact with the one plate member. That is, for example, by pressing the guide bush toward the one plate member with a jig, the guide bush can be positioned more accurately and the guide bush can be more stably fixed.

  According to a third aspect of the present invention, there is provided a pilot hole drilling step of drilling pilot holes at a plurality of positions by the drilling method according to the second aspect, and guidance of the guide bush arranged on the one plate member in a posture at the time of drilling. A guide plate material fixing step of inserting and fixing a pin bolt into the hole and the lower hole drilled in the other plate material, and a mold hole having a diameter larger than that of the guide bush in the one plate material fixed in the guide plate material fixing step A perforating mold plate fixing step for positioning and fixing a perforated mold plate with a guide, and a guide member having a guide hole for guiding a drill fitted into the mold hole and fixed, and a rivet shaft portion passing through the other plate material And a hole drilling step for drilling holes.

  According to the third aspect of the present invention, in the state where the guide bush is positioned with respect to one plate material, the one plate material and the other plate material are fixed by the pin bolt guided by the guide bush. Since the pin bolt is guided with high accuracy by the guide bush, it is possible to fix one plate material and the other plate material with high accuracy.

  Therefore, it is possible to perform drilling with high accuracy with the drill in a state where both plate materials are fixed with high accuracy. Further, since the guide bush is stably fixed to one plate material, the guide bush does not vibrate excessively during the drilling process, and the work plate material can be drilled with high accuracy. Furthermore, since the vibration of the guide bush is suppressed, wear due to wear of the guide bush and one plate material can be reduced, and the reliability durability of the guide bush, one plate material, and the like can be improved.

  According to a fourth aspect of the present invention, in the method for perforating a plate material according to the third aspect, in the perforated mold plate fixing step, pin bolts at an arbitrary position and a plurality of peripheral positions are loosened, and the guide hole is filled with the guide. A member is fitted, a drill having an outer diameter equal to the diameter of the guide hole is inserted into the guide hole of the guide member, the drill is inserted into the one shaft hole, and the position of the mold hole is aligned. A washer member having a hole having the same diameter as the pin bolt is disposed at the plurality of positions, and a washer pin bolt having the same diameter and different length as the pin bolt is inserted into the washer member, and the washer pin bolt is inserted into the other pin bolt. The pierced plate is fixed by inserting the rivet hole of the plate material to lock one end and screwing the nut to the other end.

  According to the fourth aspect of the present invention, in addition to the action of the third aspect, after positioning the perforated mold plate and the other plate material at the perforation position using a drill, the peripheral perforation position is a pin bolt for washer. Since the perforated mold plate and the other plate member are fixed by the nut and the nut, the perforating process can be performed in a more stable state, and the other plate member can be perforated more accurately.

  The invention according to claim 5 is a drilling tool for drilling a hole having a constant diameter by matching a central axis with a hole in which a countersunk hole part and a shaft hole part having a constant diameter are formed coaxially. A guide hole for guiding a drill is provided at the center of an outer diameter cylinder that abuts against the dish surface of the part, and a cylinder is formed. When the cylinder abuts against the dish surface, the cylinder fits into the shaft hole part. A guide bush having a small cylindrical portion and a drill drill guided by the guide hole are provided.

  According to the fifth aspect of the present invention, in the state where the guide bush is positioned with respect to the hole, the work plate is drilled by the drill guided by the guide bush. Here, when the guide bush is positioned, when the guide bush is moved to the hole side, first, the small cylindrical portion of the guide bush is fitted into the shaft hole portion, so that the guide bush is positioned almost accurately. When the guide bush is pressed to the hole side, the cylinder of the guide bush comes into contact with the dish surface in the circumferential direction, so that the center axis of the guide bush is positioned so as to substantially coincide with the center axis of the hole.

  Therefore, it is possible to perform drilling with high accuracy using a drill by using the guide bush positioned accurately. In addition, since the guide bush is stably fixed to the guide plate material, the guide bush does not vibrate excessively during the drilling process, and this makes it possible to drill the work plate material with high accuracy. Furthermore, since vibration of the guide bush is suppressed, wear due to wear between the guide bush and the plate material can be reduced, and the reliability durability of the guide bush, the plate material, and the like can be improved.

  According to a sixth aspect of the present invention, in the drilling tool according to the fifth aspect of the present invention, the drilling tool includes a handle that is provided on the guide bush, extends radially outward, and is substantially symmetrical with respect to the central axis of the guide bush. It is characterized by that.

  According to the sixth aspect of the invention, in addition to the action of the fifth aspect, when a load is applied to the handle on the hole side, the guide bush comes into close contact with the guide plate material. That is, for example, by pressing the guide bush toward the guide plate material with a jig, the guide bush can be positioned more accurately and the guide bush can be more stably fixed.

  According to a seventh aspect of the present invention, in the drilling tool according to the fifth or sixth aspect, a protective material is provided on the surface of the contact portion of the guide bush.

  According to the seventh aspect of the invention, in addition to the action of the fifth or sixth aspect, since the protective member is provided at the contact portion, the wear of the hole formed in the guide plate material can be suppressed. In addition, the reliability durability of the guide plate material can be improved.

  According to an eighth aspect of the present invention, in the plate material drilling tool according to any one of the fifth to seventh aspects, the base end portion is inserted into the guide hole of the guide bush and locked to the guide bush. A pin bolt having a predetermined length, and a nut screwed with the pin bolt are provided.

  According to the eighth aspect of the present invention, in addition to the operation of any one of the fifth to seventh aspects, in the state where the guide bush is positioned with respect to the guide plate material, the pin bolt that passes through the guide bush, and the pin bolt The guide plate material and the work plate material are fixed by the nuts screwed together. That is, the pin bolt is guided with high accuracy by the guide bush, and the guide plate material and the work plate material can be fixed with high accuracy.

  Therefore, for example, the cutting tool is guided to the guide bush and the work plate is subjected to drilling, and then the drilling of other parts of the work plate is performed with the guide plate and the work plate fixed. It can be carried out.

  According to a ninth aspect of the present invention, in the drilling tool according to the eighth aspect, a punching die plate having a mold hole formed corresponding to the drilling position, and the drilling hole are fitted to the mold hole. And a guide member that guides to a drilling position.

  According to the ninth aspect of the present invention, in addition to the action of the eighth aspect, in the state where the guide plate material and the work plate material are fixed by the pin bolts and nuts, the drill is guided by the guide member to drill the work plate material. Can be applied. That is, the accuracy of the hole formed in the work plate material can be improved by performing the drilling process with the drill stabilized.

  According to a tenth aspect of the present invention, in the drilling tool according to the ninth aspect of the present invention, the drilling tool includes a washer member that has an inner diameter that is the same as the inner diameter of the guide bush at the center and is placed on the drilling template. It is characterized by.

  According to the invention of claim 10, in addition to the action of claim 9, the washer member is placed on the punching plate at the drilling position where the drill is guided by the guide bush and the drilling is formed in the work plate material. Then, for example, by inserting a pin bolt and a nut through the perforation and washer member, the perforation mold plate and the work plate material can be fixed to each other.

According to the present invention, when the guide bush is positioned, when the guide bush is pressed to one plate material side, the cylinder of the guide bush comes into contact with the dish surface in the circumferential direction. Therefore, the guide bush is accurately positioned, and the guide bush is stably fixed to one of the plate members.
Therefore, using the accurately positioned guide bush, drilling can be performed with high accuracy, and the reliability durability of the rivet connection can be improved. Further, since the guide bush is stably fixed to one plate material, the guide bush does not vibrate excessively during the drilling process, and the other plate material can be drilled with high accuracy. Furthermore, since the vibration of the guide bush is suppressed, wear due to wear of the guide bush and one plate material can be reduced, and the reliability durability of the guide bush, one plate material, and the like can be improved.

  In this drilling method, a rivet hole having a countersunk hole portion and a shaft hole portion having a constant diameter is formed in one plate material fastened by a countersink rivet, and the other plate material has a constant diameter so as to coincide with the central axis of the rivet hole. The shaft hole is drilled. In the following description, a plate material that has been fastened and is already drilled is represented as a guide plate material, and a plate material that is the other plate material and is drilled by the method of the present invention is represented as a work plate material. That is, the plate material drilling method of the present embodiment is for drilling a work plate material with reference to the hole of the guide plate material.

  FIGS. 1 to 5 show an embodiment of the present invention, FIG. 1 is a side sectional view of a work plate material and a guide plate material when a prepared hole is drilled at a drilling position, FIG. 2 is a top view of a guide bush, Fig. 3 is a side sectional view of the work plate and guide plate showing the state in which the guide plate and work plate are fixed with pin bolts and nuts, and Fig. 4 is the work when the main hole is drilled at the drilling position of the work plate. Side surface sectional views of the plate material, the guide plate material, and the perforated mold plate, and FIG. In each figure, hatching is omitted for illustration.

  As shown in FIG. 1, in the first drilling method, a drill 4 as a cutting tool is inserted into a guide hole 3 of a guide plate material 2 in a state where the guide plate material 2 is overlapped on one surface of the work plate material 1. The drill 4 is made to penetrate through one drilling position PP. As shown in FIG. 1, a guide plate material guide bush 5 is placed in the guide hole 3, and the drill 4 is guided by the inner peripheral surface of the guide plate material guide bush 5. Hereinafter, the drilling tool used for the first drilling method will be described. In this embodiment, the plate material drilling tool includes a guide plate material guide bush 5, a handle 10, a handle nut 9, a pilot hole pin bolt 14, a pilot hole nut 15, and a punch plate shown in FIG. 4. In the first drilling method, a guide plate material guide bush 5, a handle 10, a handle nut 9, and the like are used.

  In the present embodiment, the work plate material 1 is an aluminum alloy used for an outer plate of an aircraft, for example, and the surface is curved and formed into a predetermined body shape. A pilot hole BH for the main hole AH for dish rivets is formed in the work plate 1 by the first drilling method.

  The guide plate material 2 has a plurality of guide holes 3 formed corresponding to the plurality of drilling positions PP, and is curved to have the same curvature as the work plate material 1.

  As shown in FIG. 1, the guide hole 3 has a first section 3 a on the work plate material 1 side and a second section 3 b on the opposite side to the work plate material 1. The first section 3a is formed to have the same diameter and extend in the normal direction. The second section 3b is formed so as to expand in diameter toward the surface. That is, the guide hole 3 is a rivet hole having a countersunk hole part and a shaft hole part with a constant diameter, and is so-called countersunk in the second section 3b.

  The guide plate material guide bush 5 is formed in a cylindrical shape, and a large-diameter portion 6 having a predetermined length is formed around the axis of the guide plate material guide bush 5 in the central portion in the axial direction. When the guide plate material guide bush 5 is set as shown in FIG. 1, the large diameter portion 6 as a cylinder has a lower end of the large diameter portion 6 and a second section (dish surface) 3 b of the guide plate material 2 first. It is provided so that it may contact | abut. Further, the diameter of the lower end portion of the guide plate material guide bush 5 is made smaller than the diameter of the first section 3 a which is a straight portion of the guide hole 3. In the first drilling method for forming the lower hole BH of the work plate material 1, the lower end of the large-diameter portion 6 of the guide plate material guide bush 5 is applied to the second section 3 b of the guide hole 3 as shown in FIG. 1. The guide bush 5 for guide plate material is positioned in contact therewith. That is, the axis of the guide plate material guide bush 5 coincides with the axis of the second section (dish hole) 3 b of the guide hole 3.

  A protective material 7 is provided so as to cover the peripheral edge portion of the lower end portion of the large diameter portion 6. The protective material 7 is made of a material that is softer than the guide plate material 2 such as a resin and does not damage the surface of the guide plate material 2 when it comes into contact with the guide plate material 2. Further, a screw portion 8 is formed on the outer peripheral surface of the guide plate material guide bush 5 on the other end side. As shown in FIG. 1, a handle 10 through which a guide plate material guide bush 5 is inserted is fixed by a handle nut 9 screwed into the screw portion 8.

  The handle 10 extends outward in the radial direction, and is formed substantially symmetrically with respect to the central axis of the guide plate material guide bush 5. In the present embodiment, the handle 10 is formed symmetrically at an angle of about 180 ° from the central axis, and is formed so as to extend in a substantially straight line when viewed from above, as shown in FIG. As shown in FIG. 1, the handle 10 is formed in a plate shape, and is fixed to the guide plate material guide bush 5 by being clamped between the handle nut 9 and the other end of the large diameter portion 6.

  In the present embodiment, as shown in FIG. 1, the lower end of the guide plate material guide bush 5 as a small cylindrical portion with the lower end of the large diameter portion 6 in contact with the second section 3 b of the guide hole 3. The part passes through the first section 3 a of the guide hole 3, but has a smaller diameter than the hole of the section, and the lower end does not contact the work plate 1. As shown in FIG. 1, the drill 4 is guided to the inner peripheral surface of the guide plate material guide bush 5.

  Here, the first drilling method will be described with reference to the process explanatory diagram shown in FIG. In FIG. 5, before the bush positioning step 100, a guide bush preparation step for preparing the guide plate material guide bush 5 described above, and a plate material fixing step for fixing the guide plate material 2 and the work plate material 1 in an overlapping manner, , Are omitted. In addition, as described above, the guide hole 3 of the guide plate material 2 is such that the first section 3a on the work plate material 1 side has substantially the same diameter and extends in the normal direction, and the second section 3b on the opposite side to the work plate material 1. Is formed so as to expand its diameter toward the surface.

  In this state, the substantially cylindrical guide plate material guide bush 5 formed with the large diameter portion 6 that is in contact with the second section 3 b of the guide hole 3 in the circumferential direction is used as the guide plate material 2. (Bush positioning step 100). When the guide plate material guide bush 5 is moved to the guide plate material 2 side, the insertion portion 5a of the guide plate material guide bush 5 is first inserted into the first section 3a of the guide hole 3 to thereby guide the guide plate material guide. Almost accurate positioning of the bush 5 is performed. When the guide plate material guide bush 5 is pressed against the guide plate material 2 side, the large diameter portion 6 of the guide plate material guide bush 5 contacts the second section 3b of the guide hole 3 in the circumferential direction. The central axis of the guide bush 5 is positioned so that the central axis of the guide hole 3 substantially coincides with the central axis of the second section (dish hole) 3 b of the guide hole 3.

  In this embodiment, at the time of positioning, both ends of the handle 10 are fixed by a jig (not shown), and a force in the direction of the work plate 1 is applied to both ends of the handle 10. As a result, the lower end of the large-diameter portion 6 is pressed against the second section 3 b of the guide hole 3, the guide plate material guide bush 5 is in close contact with the guide plate material 2, and the guide plate material guide bush 5 is against the guide plate material 2. Positioning is fixed. That is, the bush positioning process 100 of this embodiment includes a guide bush fixing process. At this time, since the handle 10 is formed of a flexible material, the handle 10 is elastically deformed and bent, so that the large diameter portion 6 of the guide bush 5 for the guide plate material or the guide plate material 2 is excessive. There is no load.

  After positioning the guide plate material guide bush 5, as shown in FIG. 1, the drill 4 is guided to the inner peripheral surface (guide hole) of the guide plate material guide bush 5, and the work plate material 1 is drilled (lower hole). Drilling process 200). Thereby, the prepared hole BH as shown in FIG.

  Thus, according to this embodiment, the chamfering process is performed on the guide hole 3 of the guide plate material 2 so that the second section 3b which is the plate surface and the large diameter portion 6 of the guide bush 5 for the guide plate material are in contact with each other. Since the contact has been made, the guide plate material guide bush 5 can be positioned accurately. Further, since the guide bush 5 for the guide plate material is accurately positioned and the guide bush 5 for the guide plate material is accurately fixed, the guide bush 5 for the guide plate material does not vibrate during drilling, and the work plate material is accurately obtained. One drilling can be performed. Further, since vibration of the guide plate material guide bush 5 is suppressed, wear due to wear between the guide plate material guide bush 5 and the guide plate material 2 can be reduced, and the guide plate material guide bush 5, the guide plate material 2 and the like. The reliability durability can be improved.

  Further, since the handle 10 is provided on the guide plate material guide bush 5, the guide plate material guide bush 5 can be pressed to the guide plate material 2 side by a jig, and the guide plate material guide bush 5 is positioned more accurately. In addition, the guide plate material guide bush 5 can be more stably fixed. Further, the bending of the handle 10 can prevent the guide plate material guide bush 5, the guide plate material 2 and the like from being damaged. This also increases the reliability of the guide plate material guide bush 5, the guide plate material 2 and the like. Can be improved.

  Furthermore, since the protective material 7 is provided at the lower end portion of the large diameter portion 6, the wear of the guide hole 3 can be suppressed, and the reliability durability of the guide plate material 2 can also be improved. Further, for example, if the protective material 7 is detachable from the large-diameter portion 6, the guide plate material guide bush 5 can be repeatedly used over a long period of time by replacing the protective material 7 every time it is worn out.

  Thus, after forming the plurality of prepared holes BH in the work plate 1 by the first drilling method, the main holes AH having the set diameter are formed by the second drilling method.

  As shown in FIG. 4, in the second drilling method, a punching mold plate 12 having a plurality of mold holes 11 formed corresponding to a plurality of drilling positions PP of the work plate material 1 is interposed between the guide plate material 2. A drill 13 as a cutting tool inserted through the mold hole 11 of the drilling plate 12 is accurately passed through the drilling position PP of the work plate 1 in a state of being overlaid on one surface of the work plate material 1. Hereinafter, the second drilling method and the drilling tool used therefor will be described with reference to the process explanatory diagram of FIG.

  As shown in FIG. 3, first, after forming the pilot hole BH by the first drilling method, the drill 4 is removed from the guide plate material guide bush 5 with the guide plate material guide bush 5 fixed to the guide plate material 2. The pilot hole pin bolt 14 as the first pin bolt is inserted into the guide plate material guide bush 5. The lower hole pin bolt 14 has substantially the same diameter as the inner peripheral surface of the guide plate material guide bush 5, and has a male screw portion 14 a formed on one end side, and the other end portion of the guide plate material guide bush 5 on the other end side. A large-diameter portion 14b that abuts is formed. The large-diameter portion 14 b of the lower hole pin bolt 14 is formed to have a smaller diameter than the mold hole 11 of the punched mold plate 12. That is, as shown in FIG. 3, the guide plate material 2 and the work piece are cut by inserting the pilot hole pin bolt 14 from the guide plate material 2 side and screwing it with the pilot hole nut 15 as the first nut on one end side. The plate 1 is fixed (guide plate fixing step 300). Therefore, in the present embodiment, the drill 4 is guided by the guide bush 5 for the guide plate material, and the work plate material 1 is drilled, and then the guide plate material 2 and the work plate material 1 are fixed, It is possible to perform drilling or the like of other parts in the work plate material 1.

  Then, after fixing the guide plate material 2 and the work plate material 1 with the lower hole pin bolts 14 and the lower hole nuts 15 at all the drilling positions PP, the lower holes at the drilling positions PP where the drilling is performed by the drill 13 are performed. The screwing of the hole pin bolt 14 and the pilot hole nut 15 is released (screwing releasing step 400). When the drilling positions PP are regularly arranged in a straight line as in the present embodiment shown in FIGS. 3 and 4, as shown in FIG. 4, the left side adjacent to the drilling position PP in which drilling with the drill 13 is shown is shown. The screw hole of the lower hole pin bolt 14 and the two right lower hole nuts 15 at the drilling position PP is released. That is, when FIG. 4 is described, the drilling position PP fastened and fixed from the left side of the drawing, the drilling position PP released from the fixing, the drilling position PP released from the fixing, the drilling position PP fastened and fixed, and the fixing These are arranged in the order of the released drilling positions PP,.

  In this state, as shown in FIG. 4, the perforated mold 12 is superimposed on the guide plate 2 (perforated mold stacking step 500). As shown in FIG. 4, as a guide member for guiding the drill 13 for forming the main hole AH in the middle mold hole 11 among the three mold holes 11 of the three drilling positions PP which are fixed. The perforated plate guide bush 16 is fitted. Then, the drill 13 is inserted into the perforated mold plate guide bush 16 to be fitted into the first section 3a of the guide hole 3, and the perforated mold plate 12 is positioned with respect to the work plate material 1 (perforated mold plate positioning step). 600). Thereby, the center position of the drilling position PP where the main hole AH is formed is accurately determined.

  Then, the punching template 12 is fixed at the two punching positions PP on both sides of the punching position PP where the main hole AH is formed. A collar 17 serving as a washer member for inserting and locking the pilot hole pin bolt (second pin bolt) 14 is disposed in contact with the perforated mold plate 12. The collar 17 has an inner diameter substantially the same as the inner diameter of the guide plate material guide bush 5 and has a cylindrical shape. Next, as shown in FIG. 4, the pilot hole pin bolt 14 is inserted into the collar 17, the perforated mold plate 12, the guide plate material 2, and the work plate material 1, and screwed with the pilot hole nut 15 as the second nut. Combine. In this way, the collar 17 is placed on the punching die plate 12 at the drilling position PP where the drill 4 is guided by the guide bushing 5 for the guide plate material and the drilling is formed in the work plate material 1. Is inserted into the lower hole BH and the collar 17, so that the perforated mold plate 12 and the work plate material 1 can be fixed to each other. In the present embodiment, the lower hole pin bolt 14 and the lower hole nut 15 are used for fixing the guide plate material 2 and the work plate 1 using the guide plate material guide bush 5 and the lower hole pin bolt. The same except for 14 axial dimensions. As a result, as shown in FIG. 4, except for the drilling position PP where the punching plate 12 forms the main hole AH, the work plate material 1 and the punching plate 12 are in the lower hole at each drilling position PP. It is fixed by the pin bolt 14 for use and the nut 15 for the prepared hole (perforated mold plate fixing step 700).

  In this state, the drill 13 is used to form the main hole AH in the work plate 1 (main hole drilling step 800). At this time, since the center position of the drilling position PP is accurately determined, drilling can be performed with high accuracy. In addition, since the drilling die plate 12 and the work plate material 1 are fixed at a plurality of drilling positions PP, the drilling die plate 12 and the work plate material 1 are displaced or excessively vibrated by the rotational load of the drill 13. The main hole AH can be formed in a stable state.

  Thus, after the main hole AH is formed at the predetermined perforation position PP, the perforated mold plate guide bush 16 is left as it is, and the main hole pin bolt corresponding to the diameter of the main hole AH, and the main hole pin bolt. The perforated mold plate 14 and the work plate material 1 are fixed by the main hole nuts screwed together (perforated mold plate refixing step 900). As a result, the punching template 12 and the work plate 1 are again fixed at the entire punching position PP.

  Then, the main hole AH is formed by the same procedure for the drilling position PP which is adjacent to the drilling position PP where the main hole AH is formed and is still in the state of the lower hole BH. In this case, at the drilling position PP in which the main hole AH is already formed, the guide bush, the collar, etc. corresponding to the diameter of the main hole AH are used in the same manner as the pin bolt and nut.

  As described above, according to the second drilling method of the present embodiment, the pilot hole pin bolt 14 is accurately guided by the guide plate material guide bush 5, and the guide plate material 2 and the work plate material 1 can be accurately fixed. Therefore, the drill 13 can be drilled with high accuracy. Further, since the guide bush 5 for the guide plate material is stably fixed to the guide plate material 2, the guide bush 5 for the guide plate material does not vibrate excessively at the time of drilling the main hole AH, and this also allows accurate cutting. Drilling of the plate material 1 can be performed. Further, since vibration of the guide plate material guide bush 5 is suppressed, wear due to wear between the guide plate material guide bush 5 and the guide plate material 2 can be reduced, and the guide plate material guide bush 5, the guide plate material 2 and the like. The reliability durability can be improved.

  Of the drilling positions PP adjacent to the drilling position PP to be drilled by the drill 13, one of the guide plate material 2 and the work plate material 1 is fixed by the lower hole pin bolt 14 and the lower hole nut 15. Since the drilling plate 12 and the work plate material 1 are fixed by the pin hole 14 for the lower hole and the nut 15 for the lower hole, both sides of the drilling position PP of the work plate material 1 are fixed when drilling with the drill 13. Can do. When the drilling position PP to be fixed has already been processed from the pilot hole BH to the main hole AH, not the pilot hole pin bolt 14 and the pilot hole nut 15 but the main hole pin bolt and the main hole. A nut will be used. Thereby, it is possible to perform drilling in a more stable state, and it is possible to perform drilling of the work plate material 1 with higher accuracy.

In addition, since the drill 13 is positioned at the drilling position PP at the drilling position PP, the accuracy of drilling can be improved.
Further, since the drill 13 can be guided by the punching plate guide bush 16 and the work plate 1 can be drilled, the work can be performed on the work plate 1 by performing the drilling while the drill 13 is stabilized. The accuracy of the main hole AH to be formed can be improved.

  In the above-described embodiment, the work plate material 1 used for an outer plate of an aircraft is shown. However, for example, a steel material, an aluminum material, or the like used for the outer plate of a railway vehicle or an automobile vehicle may be used. Of course.

  In the above embodiment, the handle 10 is formed in a substantially straight line when viewed from above. However, for example, it may be a trident or a cross, and if it is substantially symmetrical with respect to the central axis. A substantially equal load can be applied to the guide plate material guide bush 5 toward the guide plate material 2 side. In addition, it is good also as a structure which does not install the handle | steering-wheel 10 in the guide bush 5 for guide plate materials. Furthermore, for example, when the guide bush 5 for the guide plate material is made of a relatively soft material, the protective material 7 can be omitted, and other details such as a detailed structure can be changed as appropriate. Of course.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, and is a side sectional view of a work plate material and a guide plate material when a prepared hole is drilled at a drilling position. It is a top view of a guide bush. It is side surface sectional drawing of a work board material and a guide plate material which show the state which fixed the guide plate material and the work board material with the pin volt | bolt and the nut. It is side surface sectional drawing of a to-be-cut board material, a guide plate material, and a perforation type | mold board at the time of perforating this hole in a perforation position. It is process explanatory drawing at the time of forming a prepared hole and a main hole in the drilling position of a work board material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work plate material 2 Guide plate material 3 Guide hole 3a 1st area | region 3b 2nd area 4 Drill 5 Guide bush for guide plate material 5a Insertion part 6 Guide shaft 7 Protective material 9 Handle nut 10 Handle 11 Type hole 12 Drilling type plate 13 Drill 14 Pin Bolt for Prepared Hole 15 Nut for Prepared Hole 16 Guide Bush for Drilled Plate 17 Color AH Main Hole BH Prepared Hole PP Drilled Position

Claims (10)

A rivet hole having a countersink hole portion and a shaft hole portion having a constant diameter is formed in one plate material fastened by a plate rivet, and a shaft hole having a constant diameter is formed in the other plate material so as to coincide with the central axis of the rivet hole. A method for drilling a plate material to be drilled,
A guide hole for guiding a drill is formed at the center of a column having an outer diameter that comes into contact with the dish surface of the dish hole portion to form a cylinder, and when the cylinder comes into contact with the dish surface at the tip thereof A guide bush preparation step of forming a small cylindrical portion to be fitted into the shaft hole portion and preparing a guide bush;
A plate material fixing step of stacking and fixing the one plate material and the other plate material;
A guide bush fixing step of fitting the small cylindrical portion into the shaft hole and fixing the cylinder in contact with the dish surface;
And a drilling step of drilling the other plate member by guiding a drill through the guide hole. The guide bush is provided with a handle that extends radially outward and is substantially symmetrical with respect to the central axis.
2. The plate material drilling method according to claim 1, wherein in the punching step, drilling is performed in a state in which a load to the one plate material side is applied to a handle of the guide bush. 3. A pilot hole drilling step of drilling pilot holes at a plurality of positions by the drilling method according to claim 2;
A guide plate material fixing step of inserting and fixing a pin bolt into the guide hole of the guide bush arranged in the posture at the time of drilling in the one plate material and the lower hole drilled in the other plate material;
A perforated mold plate fixing step for positioning and fixing a perforated mold plate having a mold hole larger in diameter than the guide bush on the one plate material fixed in the guide plate material fixing step;
A plate material comprising: a main hole drilling step for fitting and fixing a guide member having a guide hole for guiding a drill into the mold hole, and drilling a main hole through which the rivet shaft portion is passed through the other plate material. Drilling method.   In the perforated mold plate fixing step, pin bolts at an arbitrary position and a plurality of surrounding positions are loosened, the guide member is fitted into the mold hole, and the diameter of the guide hole is equal to the guide hole of the guide member. Insert a drill with an outer diameter, fit the drill into the one shaft hole to align the position of the mold hole, and place a washer member having holes with the same diameter as the pin bolts at the peripheral positions, A washer pin bolt having the same diameter and different length as the pin bolt is inserted into the washer member, and the washer pin bolt is also inserted into the rivet hole of the other plate member to lock one end and a nut at the other end. The plate material punching method according to claim 3, wherein the punching plate is fixed by screwing together. A drilling tool for drilling a hole with a constant diameter by matching a central axis to a hole formed coaxially with a countersunk hole part and a shaft hole part with a constant diameter,
A cylinder is formed by providing a guide hole for guiding a drill at the center of an outer diameter cylinder that abuts the dish surface of the dish hole, and the shaft hole when the cylinder abuts the dish surface at the tip thereof A guide bush formed with a small cylindrical portion to be fitted in,
A drilling tool comprising: a drill drill guided in the guide hole.   The drilling tool according to claim 5, further comprising a handle provided on the guide bush, extending radially outward, and formed substantially symmetrically with respect to a central axis of the guide bush.   The drilling tool according to claim 5 or 6, wherein a protective material is provided on a surface of the contact portion of the guide bush. A pin bolt of a predetermined length inserted through the guide hole of the guide bush and having a base end locked to the guide bush;
The plate material drilling tool according to any one of claims 5 to 7, further comprising a nut screwed into the pin bolt. A perforated mold plate having a mold hole formed corresponding to the perforation position;
The drilling tool according to claim 8, further comprising a guide member that fits into the mold hole and guides the drilling drill to a drilling position.   10. The drilling tool according to claim 9, further comprising a washer member having an inner diameter that is the same as the inner diameter of the guide bush at the center, and is placed on the punch mold.

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