JP2011110667A - Deburring tool and deburring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deburring tool and method for removing a burr, which can remove, more precisely, a burr formed at a ridge of a first hole of a crossing hole and a second hole. <P>SOLUTION: By reciprocating a deburring tool 4 in an axial direction, the deburring tool 4 is able to chip off and remove a burr formed at a ridge 3 of a first hole 1 of a crossing hole and a second hole 2 by using a ring-shaped cutting blade 13 of a cutting blade forming part 9 of a deburring part 6 inserted into the second hole 2. When using a conventional deburring tool to remove a burr by chamfering, it used to be difficult to remove, completely, a burr formed at the ridge 3 of the crossing hole. The deburring tool 4 is able to remove, precisely, the burr, particularly that which is formed at the ridge 3 of the crossing hole having a relatively small crossing hole ratio d1/d2 of an inner diameter d of the first hole 1 to an inner diameter d2 of the second hole. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a deburring tool and a deburring method, and more particularly, to a deburring tool and a deburring method for removing a burr formed at a ridge portion between a first hole and a second hole of an intersecting hole.

  Examples of the object in which the cross hole is formed include a carrier part of an automatic transmission of an automobile. In general, when a cross hole is machined in a carrier part, after the first hole is machined in the workpiece (base material) by the first drill, the second hole is formed by the second drill having a smaller diameter than the first drill. Processing to open to the inner surface (inner cylindrical surface). In the cross hole processed in this way, burrs occur at the ridge between the first hole and the second hole. Since the ridge portion extends three-dimensionally, it is difficult to reliably remove the burr when using a conventional deburring tool that removes the burr by chamfering (see, for example, Patent Document 1). Such burrs at the ridges are more difficult to remove as the ratio between the inner diameter d1 of the first hole and the inner diameter d2 of the second hole (d1 / d2: hereinafter referred to as the cross hole ratio) is smaller. .

JP 2005-169517 A

  Accordingly, the present invention has been made in view of the above circumstances, and a deburring tool and a deburring device that can more reliably remove burrs formed at the ridges of the first hole and the second hole of the intersecting holes. An object is to provide a method.

  In order to solve the above problems, the deburring tool of the present invention removes burrs formed at the ridges of the first hole of the intersecting hole and the second hole having an inner diameter smaller than the inner diameter of the first hole. A deburring tool having an axial shape, wherein the deburring tool includes a deburring portion having an outer diameter corresponding to an inner diameter of the second hole at a tip portion, and the deburring portion has an annular shape on an outer peripheral surface. And at least one groove formed on each of the ridges of the groove and the outer peripheral surface, and the deburring portion is inserted into the second hole and axially The burr formed at the ridge portion between the first hole and the second hole is scraped off and removed by the cutting blade of the deburring portion.

  In order to solve the above problems, the deburring method of the present invention removes burrs formed at the ridges of the first hole of the intersecting hole and the second hole having an inner diameter smaller than the inner diameter of the first hole. A method of inserting a deburring portion at a distal end portion of a deburring tool into the second hole and stroking the deburring tool in an axial direction, thereby forming a ridge portion between the first hole and the second hole. The burrs formed on the burrs are removed by scraping with an annular cutting blade formed on the deburring portion.

(Aspect of the Invention)
In the following, aspects of the invention that is recognized as being capable of being claimed in the present application (hereinafter referred to as claimable invention) will be exemplified, and each exemplified aspect will be described. Here, as in the claims, each aspect is divided into paragraphs, numbers are assigned to the respective paragraphs, and the descriptions of other paragraphs are cited as necessary. This is for the purpose of facilitating the understanding of the claimable invention, and is not intended to limit the combination of the constituent elements constituting the claimable invention to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description accompanying each section, the description of the embodiment, etc., and as long as the interpretation is followed, another aspect is added to the aspect of each section. Moreover, the aspect which deleted the component from the aspect of each term can also be one aspect of the claimable invention.
In the following items, each of items (1) to (8) corresponds to each of claims 1 to 8 described in the claims.

(1) A shaft-shaped deburring tool for removing burrs formed at the ridges of a first hole of an intersecting hole and a second hole having an inner diameter smaller than the inner diameter of the first hole, the deburring tool Has a deburring portion having an outer diameter corresponding to the inner diameter of the second hole at the tip portion, and the deburring portion includes at least one groove formed in an annular shape on the outer peripheral surface, the groove and the outer peripheral surface. Ring-shaped cutting blades formed on each of the ridges, and by inserting the deburring part into the second hole and reciprocating in the axial direction, the ridges between the first hole and the second hole A deburring tool in which the formed burr is scraped off and removed by a cutting blade of a deburring portion.
According to the deburring tool described in this section, the deburring part inserted into the second hole is reciprocated in the axial direction, so that the burr formed at the ridge between the first hole and the second hole is It can be scraped off by the shape of the cutting edge. In this case, when the deburring tool (deburring portion) is stroked in the projecting direction with respect to the second hole, the cutting blade formed on the shank side of the cutting blades formed on both sides in the axial direction of the groove portion is used. When the deburring tool is stroked in the pulling direction with respect to the second hole, the burr is scraped off by the cutting edge formed on the tip side of the cutting edges formed on both axial sides of the groove. It is. As a result, when the deburring tool described in this section is used, burrs formed at the ridges of the cross holes that could not be completely removed by the conventional deburring tool that removes burrs by chamfering, especially Even the burrs formed at the ridges of the intersecting holes where the intersecting hole ratio d1 / d2 between the inner diameter d1 of the first hole and the inner diameter d2 of the second hole is relatively small can be reliably removed. In addition, since the burr scraped off by the cutting blade is accommodated in the groove portion, the inner surface of the second hole is damaged because the burr enters between the second hole and the outer surface of the deburring portion. There is no.
In the aspect of this section, the first hole and the second hole of the intersecting hole are processed by, for example, drilling. In addition, the 1st hole and the 2nd hole include the case where it finishes by reaming etc. after a drill process.

(2) The deburring part (1) has at least one slot extending in the axial direction from the tip part.
According to the deburring tool described in this section, when the deburring part is reciprocated in the second hole, the deburring part is reduced within the range of the slit width according to the inner diameter of the second hole. By expanding the diameter and harmonizing (adhering) the deburring part to the second hole, the cutting edge of the deburring part can be brought into contact with the ridge part of the first hole and the second hole. The burr | flash formed in the ridge part can be removed reliably.
In the aspect of this section, the slit can be formed, for example, in a cross shape perpendicular to the axis line of the deburring tool so that the deburring part is divided into four equal parts around the axis line.

(3) A bending portion having an outer diameter smaller than the outer diameter of the shank portion is provided between the deburring portion and the shank portion, and the bending portion is set according to the misalignment amount between the deburring portion and the second hole. The deburring tool according to (1) or (2), wherein the deburring part is centered with respect to the second hole by bending.
According to the deburring tool described in this section, when the deburring tool is mounted on the spindle of the machine tool, the positioned deburring tool (deburring part) is misaligned with respect to the second hole. In addition, by bending the bending portion according to the misalignment amount, the deburring portion can be reliably centered with respect to the second hole.
In the aspect of this section, the shape (outer diameter, axial length, etc.) of the bending portion can be set as necessary.

(4) The deburring part is a deburring tool according to any one of (1) to (3), wherein the deburring part includes a guide part that guides the deburring part into the second hole.
According to the deburring tool described in this section, when the deburring tool is mounted on the spindle of the machine tool, the positioned deburring tool (deburring part) is misaligned with respect to the second hole. Alternatively, the deburring portion can be guided by the guide portion and the deburring portion can be reliably inserted into the second hole.
In the aspect of this section, the guide portion can be configured, for example, by forming the tip portion of the deburring portion in a tapered shape or by forming an R shape on the periphery of the tip portion of the deburring portion.

(5) A method of removing burrs formed at the ridges of the first hole of the intersecting hole and the second hole having an inner diameter smaller than the inner diameter of the first hole, the burrs at the tip of the deburring tool The burr formed at the ridge between the first hole and the second hole is inserted into the second hole and the deburring tool is reciprocated in the axial direction. A deburring method characterized in that it is removed by scraping off with a cutting blade.
According to the deburring method described in this section, the deburring part inserted into the second hole is reciprocated in the axial direction, so that the burr formed at the ridge part between the first hole and the second hole is deburred. It can be scraped off by the ring-shaped cutting edge of the take-up part. In this case, when the deburring tool (deburring portion) is stroked in the projecting direction with respect to the second hole, the cutting blade formed on the shank side of the cutting blades formed on both sides in the axial direction of the groove portion is used. When the deburring tool is stroked in the pulling direction with respect to the second hole, the burr is scraped off by the cutting edge formed on the tip side of the cutting edges formed on both axial sides of the groove. It is. As a result, when the deburring tool used in the deburring method in this section is used, the crossing that could not be completely removed by the deburring method using the conventional deburring tool that removes the burr by chamfering. A burr formed on a ridge of a hole, particularly a burr formed on a ridge of a cross hole in which the cross hole ratio d1 / d2 between the inner diameter d1 of the first hole and the inner diameter d2 of the second hole is relatively small. Can also be reliably removed. In addition, since the burr scraped off by the cutting blade is accommodated in the groove part, the inner peripheral surface of the second hole is damaged due to the burr entering between the second hole and the outer peripheral surface of the deburring part. There is nothing.
In the aspect of this section, the first hole and the second hole of the intersecting hole are processed by, for example, drilling. In addition, the 1st hole and the 2nd hole include the case where it finishes by reaming etc. after a drill process.

(6) When the deburring tool is reciprocated in the axial direction, the outer diameter of the deburring portion is reduced according to the inner diameter of the second hole by using at least one slot formed in the deburring portion. / The deburring method according to (5), wherein the deburring portion is matched with the second hole by expanding the diameter.
According to the deburring method described in this section, when the deburring portion is reciprocated in the second hole, the deburring portion is reduced in accordance with the inner diameter of the second hole within the slit width. By expanding the diameter and harmonizing (adhering) the deburring part to the second hole, the cutting edge of the deburring part can be brought into contact with the ridge part of the first hole and the second hole. The burr | flash formed in the ridge part can be removed reliably.
In the aspect of this section, the slit can be formed, for example, in a cross shape perpendicular to the axis line of the deburring tool so that the deburring part is divided into four equal parts around the axis line. In addition, when the deburring tool used in the deburring method is mounted on the spindle of the machine tool, the stroke of the ridge between the first hole and the second hole can be handled by simply stroking the deburring tool. Although it is conceivable that the burrs formed on the portion to be removed are not removed, this problem can be solved by rotating the deburring tool.

(7) The bending portion formed between the deburring portion and the shank portion is bent according to the misalignment amount between the deburring portion and the second hole, so that the deburring portion is centered with respect to the second hole. The deburring method of (5) and (6).
According to the deburring method described in this section, when the deburring tool used in the deburring method is mounted on the main spindle of the machine tool, the positioned deburring tool (deburring portion) is in contact with the second hole. Even if misalignment occurs, the deburring portion can be reliably centered with respect to the second hole by bending the bending portion according to the misalignment amount.

(8) The deburring method according to (5) to (7), wherein the deburring portion is guided into the second hole by the guide portion formed at the tip of the deburring portion.
According to the deburring method described in this section, when the deburring tool used in the deburring method is mounted on the main spindle of the machine tool, the positioned deburring tool (deburring portion) is in contact with the second hole. Even if the center is misaligned, the deburring portion can be guided by the guide portion and the deburring portion can be reliably inserted into the second hole.

  ADVANTAGE OF THE INVENTION According to this invention, the deburring tool and the deburring method which can remove more reliably the burr | flash formed in the edge part of the 1st hole and 2nd hole of a cross hole can be provided.

It is a general view of the deburring tool of this embodiment. It is an enlarged view of the deburring part in FIG. It is explanatory drawing of the deburring method of this embodiment, Comprising: It is a figure which shows a mode that it inserts in a 2nd hole from a guide part. It is a figure which shows the state from which the deburring tool was further protruded from the state shown by FIG. 3, and the front-end | tip part of the cutting blade formation part was inserted in the 2nd hole. It is a figure which shows a mode that a deburring part repeats diameter reduction / expansion by reciprocating a deburring tool to an axial direction.

  An embodiment of the present invention will be described with reference to the accompanying drawings. Here, a second hole having a first hole 1 and an inner diameter d2 smaller than the inner diameter d1 of the first hole 1 of the cross hole processed in the carrier part (work) constituting the automatic transmission of the automobile shown in FIG. A deburring tool 4 and a method of removing the burr using the deburring tool 4 for removing the burr formed on the ridge 3 with the hole 2 will be described. The second hole 2 is processed after the first hole 1 is processed.

  As shown in FIG. 1, the deburring tool 4 is made of tool steel. For example, a shank portion 5 attached to a main shaft of a machining center via a tool holder and a tip portion (a lower portion in FIG. 1). The deburring part 6 to be formed and the bending part 7 formed between the shank part 5 and the deburring part 6 are included. The deburring part 6 is formed with a base 8 continuous to the bending part 7 and slightly larger than the outer diameter d3 of the base 8 (for example, +0.2 mm) and with a + tolerance with respect to the inner diameter d2 of the second hole 2. A cutting edge forming portion 9 having an outer diameter d4 and a guide portion 10 provided on an end surface of the cutting blade forming portion 9. The guide portion 10 is formed in a frustoconical shape having a bottom surface diameter d5 smaller than the outer diameter d4 of the cutting edge forming portion 9, and is disposed coaxially with the axis L. In addition, the guide part 10 is smoothly continuing to the cutting blade formation part 9 via the R shape 11 (refer FIG. 2).

  As shown in FIG. 2, the cutting edge forming portion 9 has an annular groove portion 12 centering on the axis L (see FIG. 1). A plurality (three in this embodiment) of the groove portions 12 are provided at predetermined intervals in the axial direction (vertical direction in FIG. 2). Further, the cutting edge forming part 9 has an annular cutting edge 13 formed at each ridge part between each groove part 12 and the outer peripheral surface of the cutting edge forming part 9. As shown in FIGS. 1 and 2, the deburring portion 6 has a slot 14 having a predetermined depth s extending in the axial direction from the guide portion 10 at the tip. The slit 14 has an axial cross section formed in a cross shape. Thereby, the deburring part 6 is divided into four equal parts around the axis L from the leading guide part 10 to the slit depth s. In addition, the hole 15 formed in the bottom part of the slot 14 is a pierced hole processed when the slot 14 is processed by wire cutting.

  The bending section 7 has an outer diameter d8 smaller than the outer diameter d7 of the shank section 5 and the outer diameter d3 of the base section 8 of the deburring section 6, and both ends of the shank section 5 and the deburring section 6 are chamfered. Each is continuous with the base 8. The outer diameter d8 and the total length b of the bending part 7 are determined by, for example, the deburring tool 4 for the second hole 2 when the deburring tool 4 is mounted on the spindle of the machining center and positioned coaxially with the second hole 2. The amount of misalignment is set to such an extent that it can be absorbed by the bending of the bending portion 7.

Next, the operation of this embodiment will be described. In addition, the case where an intersection hole is processed using a machining center is demonstrated.
First, a tool holder to which a first drill for machining the first hole 1 is mounted by an automatic tool changer (ATC) is mounted on the spindle of the machining center, and the first hole is formed in the workpiece (carrier component) by the first drill. 1 is processed. Next, a tool holder to which a second drill for machining the second hole 2 is attached to the spindle of the machining center by an automatic tool changer, and the second hole 2 is machined into the workpiece by the second drill. Thereby, the 1st hole 1 and the 2nd hole 2 are orthogonally crossed in the workpiece | work, and the cross hole (refer FIG. 3) which the 2nd hole 2 opened to the inner surface of the 1st hole 1 is formed. It should be noted that burrs extending in three dimensions are formed at the ridge 3 between the first hole 1 and the second hole 2.

  Next, the tool holder to which the deburring tool 4 of this embodiment is attached is mounted on the spindle of the machining center by the automatic tool changer, and the deburring tool 4 is positioned coaxially with respect to the second hole 2. Next, the deburring tool 4 is allowed to approach the second hole 2 while maintaining the coaxiality between the second hole 2 and the deburring tool 4. At this time, even if the second hole 2 and the deburring tool 4 are misaligned due to the positioning accuracy or the like of the machining center, the deburring section 6 is moved to the second position by the guide section 10 at the tip of the deburring tool 4. Smooth guidance into the hole 2 is possible. Further, when the deburring tool 4 is moved toward the axis L of the first hole 1 in the direction of the axis L (left direction in FIG. 3), as shown in FIG. Is inserted into the second hole 2.

  Here, the deburring tool 4 of this embodiment forms the outer diameter d4 of the cutting edge forming portion 9 with a + tolerance with respect to the inner diameter d2 of the second hole 2, and the deburring portion 6 has a cross-shaped slide. Since the split 14 is provided and the cutting blade forming portion 9 is formed so as to be able to reduce the diameter, the cutting blade forming portion 9 can be brought into close contact with the second hole 2. Further, the deburring tool 4 can absorb the misalignment amount by bending the bending portion 7 according to the misalignment amount (including the misalignment direction) with respect to the second hole 2 of the cutting edge forming portion 9. it can. Then, as shown in FIG. 5, when the deburring tool 4 is reciprocated in the direction of the axis L (left-right direction in FIG. 5), the cutting blade forming portion 9 repeats the reduced diameter and the increased diameter as necessary. The burrs at the ridge 3 between the first hole 1 and the second hole 2 are scraped off by the ring-shaped cutting blades 13 formed in harmony (close contact) with the second hole 2 and formed on both axial sides of the groove 12. Removed.

  Here, when the deburring tool 4 is stroked to the projecting side (left side in FIG. 3), burrs are generated by the cutting blade 13a on the shank side (right side in FIG. 3) of the cutting blades 13 on both sides in the axial direction of the groove 12. It is scraped off to the entry side. Further, when the deburring tool 4 is stroked to the drawing side (right side in FIG. 3), the burr is pulled out by the cutting edge 13b on the tip side (left side in FIG. 3) of the cutting edges 13 on both sides in the axial direction of the groove portion 12. It is scraped off to the side. The burr from which the ridge 3 has been removed can be accommodated in the groove 12. Further, even when the deburring tool 4 is reciprocated in the direction of the axis L, and simultaneously rotated around the axis L at a predetermined number of revolutions, even the burr formed at a position corresponding to the slot 14 of the ridge 3 It can be removed reliably.

This embodiment has the following effects.
According to this embodiment, the deburring part 6 is inserted into the second hole 2 and the deburring tool 4 is reciprocated in the direction of the axis L, whereby the ridge between the first hole 1 and the second hole 2 of the intersecting hole. The burr formed in the part 3 can be removed by scraping with the ring-shaped cutting edge 13 of the cutting edge forming part 9 of the deburring part 6. As a result, the burr formed on the ridge 3 of the cross hole, particularly the inner diameter of the first hole 1, which has been difficult to remove completely when using a conventional deburring tool that removes the burr by chamfering, is used. Even burrs formed on the ridge 3 of the intersecting hole having a relatively small intersecting hole ratio d1 / d2 between d1 and the inner diameter d2 of the second hole can be reliably removed. Further, since the burrs of the ridge portion 3 scraped off by the cutting blade 13 are accommodated in the groove portion 12, the burrs of the removed ridge portion 3 enter between the second hole 2 and the deburring portion 6. Thus, the inner peripheral surface of the second hole 2 is not damaged.
In the present embodiment, the outer diameter d4 of the cutting edge forming portion 9 is formed with a + tolerance with respect to the inner diameter d2 of the second hole 2, and the deburring portion 6 is provided with a cross-shaped slit 14, thereby deburring. When the part 6 is reciprocated in the second hole 2, the deburring part 6 is contracted / expanded in accordance with the inner diameter d2 of the second hole 2 within the slit width range, thereby forming the cutting edge forming part 9. Is harmonized (adhered) to the second hole 2, so that the cutting edge 13 of the cutting edge forming portion 9 can be brought into contact with the ridge 3 of the first hole 1 and the second hole 2. The burr | flash formed in the ridge part 3 can be removed reliably.
In the present embodiment, a bending portion 7 having an outer diameter d8 smaller than the outer diameter d7 of the shank portion 5 is provided between the deburring portion 6 and the shank portion 5, and the bending portion 7 is connected to the deburring portion 6. For example, when the deburring tool 4 is mounted on the spindle of the machining center, the deburring tool 4 is positioned when the deburring tool 4 is mounted on the spindle of the machining center. Even if the deburring portion 6 is misaligned with respect to the second hole 2, the bending portion 6 is bent with respect to the second hole 2 by bending the bending portion 7 according to the misalignment amount. Can be put out.
In this embodiment, since the guide part 10 which guides the deburring part 6 into the 2nd hole 2 was provided in the front-end | tip part of the deburring tool 4, for example, when attaching the deburring tool 4 to the spindle of a machining center Even if the positioned deburring tool 4 (deburring section 6) is misaligned with respect to the second hole 2, the guide section 10 guides the deburring section 6 into the second hole 2 and The two holes 2 can be reliably inserted.

In addition, embodiment is not limited above, For example, you may comprise as follows.
In this embodiment, the groove 12 formed in the cutting edge forming portion 9 of the deburring portion 6 of the deburring tool 4 is formed in a U-shaped cross section, but the groove 12 may be a V-groove, for example. Moreover, the width | variety of the groove part 12, quantity, and the space | interval with the adjacent groove part 12 can also be set as needed.
In this embodiment, the slit 14 is formed in a cross shape, and the cutting edge forming portion 9 is divided into four equal parts around the axis L. For example, the cutting blade forming part 9 is divided into three equal parts around the axis L. A slot 14 can be formed.
In the present embodiment, the object in which the cross hole is formed is the carrier part of the automatic transmission of the automobile, but this is not intended to limit the object to the carrier part.
In this embodiment, the deburring tool 4 is mounted on the main spindle of the machining center, but the deburring part 6 of the deburring tool 4 is inserted into the second hole 2 and reciprocated by the operator's manual work. Thus, the burr at the ridge 3 of the cross hole can be scraped off and removed.
The tool which processes the 1st hole 1 and the 2nd hole 2 is not limited to a drill. In addition, after drilling or removing burrs, the first hole 1 or the second hole 2 may be finished with a reamer or the like.

1 1st hole, 2nd hole, 3 ridges, 4 Deburring tool, 6 Deburring part, 7 Bending part, 10 Guide part, 11 R shape (Guide part), 12 Groove part, 13 Cutting edge, 14 Slot

Claims (8)

A shaft-shaped deburring tool for removing burrs formed at the ridges of the first hole of the intersecting hole and the second hole having an inner diameter smaller than the inner diameter of the first hole,
The deburring tool includes a deburring portion having an outer diameter corresponding to an inner diameter of the second hole at a tip portion,
The deburring portion includes at least one groove formed in an annular shape on an outer peripheral surface, and an annular cutting blade formed on each ridge portion of the groove and the outer peripheral surface,
By inserting the deburring part into the second hole and reciprocating in the axial direction, the burr formed on the ridge between the first hole and the second hole is caused by the cutting edge of the deburring part. Deburring tool characterized by being removed by scraping. The deburring tool according to claim 1, wherein the deburring portion has at least one slot extending in an axial direction from a tip end portion. A bending portion having an outer diameter smaller than the outer diameter of the shank portion is provided between the deburring portion and the shank portion, and the bending portion is in accordance with an amount of misalignment between the deburring portion and the second hole. The deburring tool according to claim 1, wherein the deburring portion is centered with respect to the second hole by bending the deburring portion. The deburring tool according to any one of claims 1 to 3, wherein the deburring section includes a guide section that guides the deburring section into the second hole at the tip. A method of removing burrs formed at the ridges of a first hole of an intersecting hole and a second hole having an inner diameter smaller than the inner diameter of the first hole,
A deburring portion at the tip of the deburring tool was inserted into the second hole, and the deburring tool was reciprocated in the axial direction, thereby forming a ridge portion between the first hole and the second hole. A deburring method comprising removing a burr by scraping off with a ring-shaped cutting blade formed in the deburring portion. When the deburring tool is reciprocated in the axial direction, the outer diameter of the deburring portion is reduced according to the inner diameter of the second hole by using at least one slot formed in the deburring portion. The deburring method according to claim 5, wherein the deburring portion is matched with the second hole by increasing / decreasing the diameter. The bending part formed between the deburring part and the shank part is bent according to the misalignment amount between the deburring part and the second hole, so that the deburring part becomes the second hole. The deburring method according to claim 5, wherein centering is performed. The deburring method according to any one of claims 5 to 7, wherein the deburring portion is guided into the second hole by a guide portion formed at a tip portion of the deburring portion.

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