JP2016203278A - Deburring tool, and deburring method with use of same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deburring tool having high practical utility, and a deburring method.SOLUTION: A deburring tool 10 which comprises a main body 30, an oscillation body 32 which is so supported on the main body as to be capable of oscillating, and energization mechanisms 50, 54 which so energize the oscillation body as to decrease an oscillation amount thereof, and which removes a burr formed at an opening of a hole 22. In the deburring device, the oscillation body is provided with blades 64, 68 for removing burrs during normal rotation thereof, and blades 66, 70 for removing burrs during reverse rotation thereof. According to a deburring method with the use of the tool, even if the opening of the hole is formed in the form of a step surface and has a ramp, deburring for the opening can be performed by the normal rotation and the reverse rotation thereby achieving sufficient deburring.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a deburring tool for deburring formed in an opening of a hole, and a method for deburring the deburring tool.

  It is common practice to remove burrs formed at the opening of a hole after drilling with a drill or the like. As a tool for removing such burrs, for example, a tool described in the following patent document has been studied. The tool is provided with a main body, an oscillating body supported by the main body so as to be able to oscillate, an urging mechanism for urging the oscillating body so as to reduce the oscillating amount, and a burring provided on the oscillating body to remove the burr The single blade is configured to remove the burr formed in the opening by rotating the main body and the rocking body in one direction.

JP 2006-281358 A

  Although the deburring tool as described in the above-mentioned patent document can perform a good deburring, there is still enough room for improvement. By improving such a deburring tool, the practicality of the deburring tool can be improved. The present invention has been made in view of such circumstances, and an object thereof is to provide a highly practical deburring tool and deburring method.

  In order to solve the above problems, a deburring tool according to the present invention includes a first blade for removing burrs in a normal rotation of the tool and a second blade for removing burrs in a reverse rotation. Both are provided. The deburring method of the present invention is characterized in that the deburring is performed using the deburring tool.

  As will be described in detail later, for example, a hole opening may be formed on the step surface, and in that case, the opening may include an inclined portion. It is expected that the burrs formed in the inclined portion cannot be sufficiently removed depending on the rotation direction of the tool. Such an opening is an example, but the burr may not be removed depending on the shape of the opening. Since the deburring tool of the present invention has the two blades, it can remove the burr formed at the opening of the hole by rotating in both the forward and reverse directions. Therefore, according to the deburring tool and the deburring method of the present invention, it is possible to perform good deburring with respect to openings of various shapes.

Aspects of the Invention

  In the following, some aspects of the invention that can be claimed in the present application (hereinafter sometimes referred to as “claimable invention”) will be exemplified and described. As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is merely for the purpose of facilitating the understanding of the claimable inventions, and is not intended to limit the combinations of the constituent elements constituting those inventions 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 embodiments, etc., and as long as the interpretation is followed, another aspect is added to the form of each section. In addition, an aspect in which some constituent elements are deleted from the aspect of each item can be an aspect of the claimable invention.

  In the following items, items (1) to (8) correspond to claims 1 to 8, respectively.

(1) A deburring tool for deburring formed in an opening of a hole,
A main body that is rotated forward and backward around a tool axis that is a rotation axis of the deburring tool;
A swing supported by the main body so as to extend in the direction in which the tool axis extends from the main body, rotated forward and backward together with the main body, and swingable about a swing axis intersecting the tool axis. Moving body,
An urging mechanism that urges the oscillating body to reduce the amount of oscillating by an elastic force of the elastic body;
(A) a first blade for removing burrs in forward rotation; and (b) a second blade for removing burrs in reverse rotation. Deburring tool.

  According to the deburring tool of this aspect, it is possible to deburr both in the forward rotation and the reverse rotation, and the rocking body can be swung at the time of deburring. Even if the opening is an opening that exists on a stepped surface connected by an inclined surface, it is possible to sufficiently remove burrs formed in the opening.

  Note that the urging mechanism is an elastic body according to the shape of the opening, such as the angle of the inclined surface, the step amount of the stepped surface, etc., for the purpose of adjusting the chamfering amount, adapting to the hardness of the workpiece, etc. It is desirable to be able to adjust the magnitude of the urging force by. In addition, the blade may be formed directly on the rocking body, or may be attached to the rocking body as a separate body, such as a throw-away tip described later. Note that, for the purpose of deburring the opening, the blade is preferably provided so as to extend in a direction inclined with respect to the tool axis, for example.

(2) The deburring tool is a tool for deburring formed at each of the openings at both ends of the through hole,
The first blade and the second blade are in contact with one of the openings at both ends of the through hole to remove a burr formed on one of the two,
The deburring tool is further
(C) a third blade for removing burrs formed on the other side in forward rotation, and (d) in reverse rotation. The deburring tool according to item (1), further comprising a fourth blade for deburring formed on the other side.

  According to the deburring tool of this aspect, even if at least one of the openings at both ends of the through hole is an opening on the step surface, it is possible to sufficiently remove the burrs at the openings at both ends. . When performing deburring with the deburring tool of this aspect, if only one of the openings at both ends of the through hole exists on the step surface, all of the four blades are not necessarily involved in deburring. It does not have to be.

  (3) Using the swinging of the swinging body, any part of the swinging body where the first blade, the second blade, the third blade, or the fourth blade is provided is also penetrated. The deburring tool according to (2), which is configured to be able to pass through a hole.

  According to this aspect, since the blade provided on the rocking body can pass through the through hole and protrude to the opposite side of the hole, the deburring of the opening at both ends of the through hole is performed. This can be done from one side. The blade provided on the oscillator may be configured to pass through the through hole without moving the deburring tool in a direction intersecting with the direction in which the tool axis extends, and without tilting the tool axis. desirable.

  (4) When the first blade, the second blade, the third blade, and the fourth blade all pass through the through hole, an end portion that comes into contact with the inner peripheral surface of the through hole is formed. The deburring tool according to item (3), which has an R shape.

  According to this aspect, when each blade passes through the through hole, the inner peripheral surface of the through hole is prevented or reduced by each blade.

  (5) Two sets of the first blade, the second blade, the third blade, and the fourth blade are provided in two sets close to each other in the tool axis direction, and the two sets However, in the direction in which the tool axis extends, all of the first blade, the second blade, the third blade, and the fourth blade are in contact with the opening in a state where the two sets are positioned with the through hole interposed therebetween. The deburring tool according to the item (3) or (4), which is provided with an interval sufficient to avoid contact.

  According to this aspect, the aspect described above, that is, the aspect in which deburring of the openings at both ends of the through hole is performed from one side of the hole can be easily realized. In this aspect, for example, an aspect in which the first blade and the second blade are combined into one set, and the third blade and the fourth blade are combined into another set, a first blade and a third blade described later. A mode in which the blade is combined into one set and the second blade and the fourth blade are combined into another set is included.

  (6) The burr according to (5), wherein the first blade and the third blade constitute one of the two sets, and the second blade and the fourth blade constitute the other of the two sets. Removal tool.

  According to this aspect, two blades that perform deburring in the forward rotation are provided close to each other, and two blades that perform deburring in the reverse rotation are provided in close proximity to each other. Therefore, according to this aspect, it is possible to easily realize an aspect described later, that is, an aspect in which two blades adjacent to each other are formed using one throw-away tip. Specifically, since two blades can be formed on one side of the throw-away tip, the throw-away tip can be easily used.

(7) Two throwaway tips are attached to the rocking body,
One of two adjacent sides of one of the two throwaway tips functions as the first blade, the other functions as the third blade, and the other of the two adjacent sides of the two throwaway tips. The deburring tool according to item (6), wherein one of the two functions as the second blade and the other functions as the fourth blade.

  According to this aspect, it is possible to easily cope with the wear (sagging) of the blade. Although not included in this embodiment, a throw-away tip is adopted in which a blade that performs deburring in the forward rotation and a blade that performs deburring in the reverse rotation are formed on one and the other of the two surfaces, respectively. It is also possible, and by adopting such a throw-away tip, it is possible to reduce the number of throw-away tips attached to the rocking body. Note that the throw-away tip may be in various shapes such as a square shape or a triangular shape.

  (8) A deburring method characterized in that the deburring formed at the opening of the hole is removed by using the deburring tool according to any one of (1) to (7).

  According to the deburring method of this aspect, it is possible to enjoy the advantages obtained by the deburring tool of each aspect described above.

It is a figure which shows the deburring tool as an Example of claimable invention, and the workpiece | work used as the object of the deburring by the tool. It is a 3rd view which shows the detail of a deburring tool. It is a figure which shows a mode that the quill which is a rocking body of the deburring tool rocks. It is a figure for demonstrating an example of the deburring process by a deburring tool. It is a figure for demonstrating another example of the deburring process by a deburring tool.

  Hereinafter, as a form for carrying out the claimable invention, a deburring tool as an embodiment of the claimable invention will be described in detail with reference to the drawings. In addition to the embodiments described below, the claimable invention should be implemented in various forms including various modifications and improvements based on the knowledge of those skilled in the art, including the forms described in the above [Aspect of the Invention]. Can do.

[1] Application of Deburring Tool The deburring tool 10 of the embodiment shown in FIG. 1 is designed for the purpose of deburring the holes 22a and 22b of the workpiece 20 called a yoke. The holes 20a and 22b of the workpiece 20 (hereinafter sometimes collectively referred to as “holes 22” when they do not need to be distinguished from each other) are two plate-like portions 24a and 24b that are arranged at intervals (similarly, “ The plate-like portion 24 "may be collectively referred to as a through-hole, and both have the same diameter and the center line is a common through-hole. The deburring tool 10 is formed at each of the openings 26 at both ends of each of the two holes 22, specifically, at the corner between the plate surface of the plate-like portion 24 and the inner peripheral surface of the hole 22. A tool for deburring. In other words, the deburring tool 10 is a tool for performing extremely small chamfering of the opening 26 of the hole 22.

  The surfaces of the two plate upper portions 24a and 24b facing each other (hereinafter sometimes referred to as “inner surface” and the opposite surface as “outer surface”) are stepped surfaces, and the two holes 22 Each of the openings 26 on the inner surface has two inclined portions 28 (also referred to as “ridge line portions”) and two stepped surface portions 29a and 29b. The burr formed on one of the two inclined portions 28 may not be sufficiently removed when the tool is rotated in one direction. The deburring tool 10 is a tool designed in consideration of that.

[2] Configuration of Deburring Tool The configuration of the deburring tool 10 will be described below with reference to FIG. 2 (a) is a front view (partially sectional view), FIG. 2 (b) is a bottom view (view of the tool from below), and FIG. 2 (c) is a side view (related). The figure which looked at the tool from the tip side) is shown respectively. As can be seen from FIG. 2, the deburring tool 10 includes a tool main body 30 and a quill 32 as a swinging body supported by the tool main body 30 so as to be swingable.

  The tool main body 30 has a shank 34 located on the base end side (right side in FIGS. 2A and 2B) and a support 36 located on the distal end side (left side in FIGS. 2A and 2B). , Integrated. The shank 34 is a part attached to a chuck such as a drilling machine or a milling machine, and the support 36 is a part that supports the quill 32. The shank 34 and the support 36 are integrated by fastening their flange portions with bolts. Incidentally, the center axis of the tool body 30 is the tool axis L, and the direction in which the tool axis L extends is hereinafter referred to as the tool axis direction.

  The support 36 is a generally cylindrical member having the flange portion on the proximal end side, and a slot 38 is formed on the distal end side. On the other hand, the quill 32 is a generally plate-like member having a step, and a proximal end portion is inserted into the slot 38. A pin holding hole 40 is formed in the support 36 so as to intersect with the slot 38. On the other hand, a hole 42 having substantially the same diameter as the pin holding hole 40 is formed in the proximal end portion of the quill 32. It is drilled at a position corresponding to the pin holding hole 40. A pin 44 is fitted into the pin holding hole 40 so as to pass through the hole 42, and the quill 32 is swingably supported by the support 36, that is, the tool body 30 by the pin 44. Specifically, the quill 32 is supported so as to extend from the tool body 30 to the tip side in the tool axis direction, and swings around the swing axis O (the center line of the pin 44) intersecting the tool axis L. It is possible. The quill 32 rotates about the tool axis L together with the tool body 30 when the tool body 30 is rotated about the tool axis L.

  The shank 34 is also a cylindrical member having the flange portion, and the inside of the shank 34 and the inside of the support 36 are connected. Inside the shank 34 and the support 36, that is, the inside of the tool body 30, a generally cylindrical rod 50 having a rounded tip side is movable in the tool axis direction and a portion on the tip side faces the slot 38. Arranged. Further, both ends of the shank 34 are supported by a portion on the proximal end side of the rod 50 and one of the two screw plugs 52 screwed in line with the portion on the proximal end side of the shank 34. Thus, a compression coil spring 54 as an elastic body is disposed. On the other hand, a generally V-shaped notch 56 that opens toward the proximal end is formed in the proximal end portion of the quill 32, and the distal end of the rod 50 is engaged with the notch 56. Yes.

  The quill 32 is maintained at the position shown in FIG. 2, that is, the neutral position by the urging force of the spring 54, and overcomes the urging force when force is applied from the outside. For example, FIG. Swings as shown. That is, the spring 54, which is an elastic body, biases the quill 32 through the rod 50 so as to reduce the amount of swing from the neutral position of the quill 32. In the deburring tool 10, the spring 54, the rod 50 includes the urging mechanism. Note that the magnitude of the urging force can be adjusted by adjusting the position of the screw plug 52.

  As shown in the drawing, two throwaway tips 60 and 62 are attached to the quill 32 at a distance in the tool axis direction. Each of the two throw-away tips 60 and 62 is rectangular, and one corner, that is, a direction in which two sides on both sides of the one corner intersect the tool axial direction from the quill 32, that is, a diameter. It is attached in a posture that protrudes in the direction. Furthermore, these two sides are attached in a posture inclined with respect to the tool axis L. Incidentally, the throwaway tips 60 and 62 are fixed by bolts not shown.

  Since the throwaway tips 60 and 62 are attached in the above-described posture, the deburring tool 10 extends while being inclined with respect to the tool axis L, and abuts against the opening 26 of the hole 22 to deburr. It has four blades for the purpose, specifically, a first blade 64, a second blade 66, a third blade 68, and a fourth blade 70. Specifically, one of the two adjacent sides of the throw-away tip 60 functions as the first blade 64, the other functions as the third blade 68, and one of the two adjacent sides of the throw-away tip 62 is the first blade 64. As the two blades 66, the other functions as the fourth blade 70.

  Furthermore, the first blade 64 and the third blade 68 of the throw-away tip 60 are blades for removing burrs formed in the opening 26 in the normal rotation (right rotation) of the deburring tool 10. The second blade 66 and the fourth blade 70 of the throw-away tip 62 are blades for removing burrs formed in the opening 26 in the reverse rotation (left rotation) of the deburring tool 10. Yes.

  Further, the first blade 64 of the throw-away tip 60 and the second blade 66 of the throw-away tip 62 are one of the openings at both ends of the two through-holes 22a and 22b, specifically, the hole 22a. A blade capable of abutting against the opening 26 on the outer side surface and the opening 26 on the inner side surface of the hole 22b and removing each burr of these openings 26; a third blade 68 of the throw-away tip 60; The fourth blade 70 of the throw-away tip 62 is formed on the other of the openings at both ends of the two through-holes 22a and 22b, specifically, the opening 26 on the inner surface of the hole 22a and the outer surface of the hole 22b. It is set as the blade which can contact | abut to the opening 26 and can remove each burr | flash of these openings 26. FIG.

  The radial dimension of the quill 32 and the portion of the tool body 30 that supports the quill 32 (portion forming the cylindrical shape of the support 36) is made smaller than the inner diameter of the hole 22. In the state where the center line and the tool axis L of the deburring tool 10 coincide with each other and the quill 32 is located at the neutral position, all of the four blades 64, 66, 68, 70 are openings 26 of the holes 22. The throw-away tips 60 and 62 protrude outward in the radial direction from the virtual surface obtained by extending the inner peripheral surface of the hole 22.

  Furthermore, in the deburring tool 10, the first blade 64 and the third blade 68 adjacent to each other in the tool axis direction form one set, and the second blade 66 and the second blade 66 adjacent to each other in the tool axis direction. The four blades 70 form another set, and the interval between these sets is larger than the length of the hole 22 that is a through hole, that is, the thickness of the plate-like portion 24. In other words, as shown in FIG. 2A, in the state where the two sets are located with the hole 22 in between, all of the four blades 64, 66, 68, and 70 are in contact with any opening 26. It is provided with an interval so as not to touch.

  Further, the movement of the deburring tool 10 toward the distal end in the tool axis direction is referred to as advancement and movement toward the proximal end, which is referred to as retraction. As the deburring tool 10 moves forward and backward, the throw-away tip 60 is moved. , 62 contacts the opening of the hole 22. If the deburring tool 10 is moved forward and backward, as shown in FIG. 3, the quill 32 resists the biasing force of the spring 54 by the external force applied to the throw-away tips 60 and 62, and the throw-away tips 60 and 62 are moved. Oscillates until the tip (corner portion) reaches the inner peripheral surface of the hole 22. Incidentally, FIG. 3A shows a state in which the quill 32 swings until the protruding end of the slowway tip 60 reaches the inner peripheral surface of the hole 22, and FIG. 3B shows a state where the protruding end of the slowway tip 62 has the hole 22. The state where the quill 32 is swung to the inner peripheral surface is shown. In other words, the deburring tool 10 uses the swing of the quill 32 so that the first blade 64, the second blade 66, the third blade 68, and the fourth blade 70 of the quill 32 are provided. It is possible to pass through the hole 22.

  With the configuration as described above, the deburring tool 10 allows the burrs of the openings 26 at both ends of the hole 22 that is a through hole formed in the plate-like portion 24 to be transferred from one surface side of the plate-like portion 24 to the workpiece. Therefore, it is possible to remove 20 by either forward rotation or reverse rotation without inverting 20.

  In the deburring tool 10, the corners (corner portions) of the throw-away tips 60 and 62 have an R shape. In other words, in each of the first blade 64, the second blade 66, the third blade 68, and the fourth blade 70, the end that contacts the inner peripheral surface of the hole 22 when passing through the hole 22 has an R shape. It is said that. With such a shape, each of the first blade 64, the second blade 66, the third blade 68, and the fourth blade 70, that is, each of the throwaway tips 60 and 62 passes through the hole 22. At that time, the blades 64, 66, 68, and 70 effectively prevent or reduce damage to the inner peripheral surface.

[3] Deburring with Deburring Tool An example of deburring with respect to the workpiece 20 with the deburring tool 10 will be described below with reference to FIG. In the example of machining described below, the deburring tool 10 is attached to a horizontal milling machine or the like that can be rotated forward and backward, and can be moved forward and backward in the tool axis direction. 20 is set on the tip side of the attached deburring tool 10 at a machining start position where the center line of the two holes 22 coincides with the tool axis L of the attached deburring tool 10.

  First, the deburring tool 10 (hereinafter may be abbreviated as “tool 10”) is positioned at the position shown in FIG. (A), that is, the first blade 64 contacts the opening 26 on the outer surface of the hole 22a of the plate-like portion 24a. The first blade 64 deburrs the opening 26 on the outer surface of the hole 22a while moving forward to a position immediately before the rotation, and then moving forward at a predetermined processing speed in the forward rotation. Subsequently, the position shown in (b) (the position where the apex of the cutting edge follows the entire inner circumference of the hole 22a, in other words, the position where the corner of the throw-away tip follows the entire inner circumference of the hole 22a) ), A predetermined feed speed while maintaining normal rotation to the position shown in (c), that is, the position immediately before the first blade 64 contacts the opening 26 on the inner surface of the hole 22b of the plate-like portion 24b. The tool 10 is further advanced at a speed (for example, generally faster than a rapid feed speed or a machining speed).

  Next, deburring of the opening 26 on the inner side surface of the hole 22b is performed by the first blade 64 while maintaining forward rotation and moving forward at a predetermined processing speed at the position indicated by (c). Subsequently, while maintaining the normal rotation, the position shown in (d) (the position where the vertex of the cutting edge follows the entire inner circumference of the hole 22b) passes through the position shown in (e), that is, the second blade 66 is in the hole. The tool is further advanced at a predetermined feed speed to a position immediately before contacting the opening 26 on the inner surface of 22b.

  Then, at the position shown in (e), the rotation of the tool 10 is switched to the reverse rotation and advanced at a predetermined processing speed, and the second blade 66 makes the burrs of the opening 26 on the inner surface of the hole 22b of the plate-like portion 24b. Take. After that, while maintaining the reverse rotation, from the position shown in (f) (position where the vertex of the cutting edge follows the entire inner circumference of the hole 22b), the position shown in (g), that is, the third blade 68 is located in the hole 22b. The tool 10 is retracted at a predetermined feed speed to a position immediately before contacting the opening 26 on the outer surface.

  Next, at the position shown in (g), the rotation of the tool 10 is switched again to the normal rotation, and the third blade 68 is used to retract the opening 26 on the outer surface of the hole 22b of the plate-like portion 24b while retreating at a predetermined processing speed. Deburring. Subsequently, while maintaining the normal rotation, the position shown in (h) (the position where the apex of the cutting edge follows the entire inner circumference of the hole 22b) passes through the position shown in (i), that is, the fourth blade 70 is a plate. The tool is further retracted at a predetermined feed rate to a position immediately before contacting the opening 26 on the inner side surface of the hole 22a of the shaped portion 24a.

  Next, at the position shown in (i), the rotation of the tool is switched again to the reverse rotation, and the fourth blade 70 is used to retract the opening 26 on the inner surface of the hole 22a of the plate-like portion 24a while retreating at a predetermined processing speed. Perform deburring. Subsequently, while maintaining reverse rotation, the position shown in (j) (the position where the vertex of the cutting edge follows the entire inner circumference of the hole 22a) passes through the position shown in (k), that is, the third blade 68 is in the hole. The tool is further retracted at a predetermined feed speed to a position immediately before contacting the opening 26 on the inner surface of 22a.

  Next, at the position shown in (k), the rotation of the tool is further switched to the normal rotation again, and retracted at a predetermined processing speed, and the opening 26 on the inner surface of the hole 22a of the plate-like portion 24a is made by the third blade 68. Deburring. Then, while maintaining the normal rotation, the tool 10 is retracted to the start position at a predetermined feed speed through the position shown in (l) (the position where the vertex of the cutting edge follows the entire inner circumference of the hole 22a), The rotation of the tool 10 is stopped at the position, and the deburring process for the workpiece 20 including a series of deburring is completed.

  According to the deburring process, the deburring of the opening 26 on the inner surface of the hole 22a formed in the plate-like portion 24a and the burring between the opening 26 on the inner surface of the hole 22b formed in the plate-like portion 24b are performed. Deburring is performed twice in each of normal rotation and reverse rotation of the deburring tool 10. Therefore, the burrs of the openings 26 are sufficiently removed even though the openings 26 are openings formed on the stepped surface, that is, the openings having the inclined portions 28. Become.

  More specifically, when the blade comes to the burr of the inclined portion 28 from the upper side (moves in the direction from the step surface portion 29b to the step surface portion 29a in FIG. 1), the blade directly hits the burr, so that the burr is sufficiently removed. However, when the blade comes from the lower side (moves in the direction from the stepped surface portion 29a to the stepped surface portion 29b in FIG. 1), the ridge line on the back side of the blade comes into contact (so-called second hit phenomenon), etc. For this reason, a phenomenon occurs as if the blade jumps on the inclined portion 28, and the burrs on the inclined portion 28 are not likely to be sufficiently removed. According to the deburring tool 10, it is possible to deburr the inclined portion 28 in both the forward rotation and the reverse rotation, and thus the burrs in both of the two inclined portions are sufficiently removed. More specifically, the opening 26 on the inner surface sequentially deburrs the step surface portion 29a, the inclined portion 28, and the step surface portion 29b while moving the deburring tool 10 forward or backward, but deburring the inclined portion 28 and the step surface portion 29b is performed. At the time of processing, the throwaway tips 60 and 62 are swung to fit in the holes 22a and 22b, and the stepped surface portion 29a is processed more than necessary, or the throwaway tips 60 and 62 are caught by the stepped surface portion 29a and deburred. The rotation of the tool 10 does not stop.

  Further, according to the deburring process, the movement direction of the deburring tool 10 is switched only once, so that a quick deburring process is realized. Incidentally, in the series of deburring in the deburring process, the tool is advanced and retracted while maintaining the rotation of the tool 10 when the throwaway tips 60 and 62 pass through the holes 22a and 22b. , 66, 68, 70 is to prevent or suppress damage to the openings 26 and the inner peripheral surfaces of the holes 22 a, 22 b as much as possible.

  Next, another example of the deburring process for the workpiece 20 by the deburring tool 10 will be described with reference to FIG.

  In the deburring process of this example, after setting the workpiece 20 and the tool 10 in the same manner as in the previous deburring process, first, the tool 10 is moved to the position shown in FIG. The first blade 64 is used to deburr the opening 26 on the outer surface of the hole 22a while moving forward to a position immediately before contacting the opening 26 on the outer surface of the hole 22a. . Subsequently, after passing through the position shown in (b) (the position where the vertex of the cutting edge follows the entire inner circumference of the hole 22a), the position shown in (c), that is, the third blade 68 is located in the hole 22a of the plate-like portion 24a. The tool 10 is further advanced at a predetermined feed speed while maintaining normal rotation to a position slightly away from the opening 26 on the inner surface.

  Next, at the position shown in (c), the tool 10 is retracted at a predetermined processing speed while maintaining normal rotation, and the third blade 68 is used to open the opening 26 on the inner surface of the hole 22a of the plate-like portion 24a. Perform deburring. Thereafter, while maintaining normal rotation, from the position shown in (d) (the position where the vertex of the cutting edge follows the entire inner circumference of the hole 22a), the position shown in (e), that is, the first blade 64 is a plate-like portion. The tool 10 is advanced at a predetermined feed speed to a position just before contacting the opening 26 on the inner surface of the hole 22b of 24b.

  Then, at the position shown in (e), while the forward rotation is maintained, the tool 10 is advanced at a predetermined processing speed, and the first blade 64 is used to burrs the opening 26 on the inner surface of the hole 22b of the plate-like portion 24b. Take. Thereafter, while maintaining the normal rotation, the position shown in (f) (the position where the vertex of the cutting edge follows the entire inner circumference of the hole 22b) passes through the position shown in (g), that is, the third blade 68 is plate-shaped. The tool 10 is further advanced at a predetermined feed speed to a position slightly away from the opening 26 on the outer surface of the hole 22b of the portion 24b.

  Next, at the position shown in (g), the tool is retracted at a predetermined processing speed while maintaining normal rotation, and the third blade 68 is used to burr the opening 26 on the outer surface of the hole 22b of the plate-like portion 24b. Take. Thereafter, while maintaining normal rotation, the position shown in (i) from the position shown in (h) (the position where the vertex of the cutting edge follows the entire inner circumference of the hole 22b), that is, the second blade 66 is a plate-like portion. The tool 10 is advanced at a predetermined feed speed to a position just before contacting the opening 26 on the inner surface of the hole 22b of 24b.

  Then, at the position shown in (i), the rotation of the tool 10 is switched from normal rotation to reverse rotation and advanced at a predetermined processing speed, and the second blade 66 opens the inner surface of the hole 22b of the plate-like portion 24b. 26 deburring. Subsequently, while maintaining the reverse rotation, the position shown in (k) from the position shown in (j) (position where the vertex of the cutting edge follows the entire inner circumference of the hole 22b), that is, the fourth blade 70 is plate-shaped. The tool 10 is retracted at a predetermined feed speed to a position immediately before contacting the opening 26 on the inner side surface of the hole 22a of the portion 24a.

  Next, at the position shown in (k), while maintaining the reverse rotation, the fourth blade 70 is moved backward at a predetermined processing speed to deburr the opening 26 on the inner surface of the hole 22a of the plate-like portion 24a. Do. Subsequently, while maintaining the reverse rotation, the position shown in (l) (the position where the vertex of the cutting edge follows the entire inner circumference of the hole 22a) is passed to a position shown in (m) (processing completion position). The tool 10 is further retracted at the feed speed, the rotation of the tool 10 is stopped at that position, and the deburring process for the workpiece 20 including a series of deburring is completed.

  According to this deburring process, as in the previous deburring process, the deburring of the opening 26 on the inner surface of the hole 22a drilled in the plate-like portion 24a and the hole 22b drilled in the plate-like portion 24b are performed. The deburring with the opening 26 on the inner surface is performed twice in each of the forward rotation and the reverse rotation of the deburring tool 10. Therefore, although the openings 26 are openings formed on the stepped surface, that is, the openings having the inclined portions 28, as described in detail earlier, Is sufficiently removed.

  According to this deburring process, the deburring process of all the openings 26 is realized without changing the rotation direction of the deburring tool 10 only once. In this deburring process, the tool is advanced and retracted at a fast feed speed while maintaining the rotation of the tool 10 in a series of deburring processes for the same reason as in the previous deburring process.

  The deburring process on the workpiece 20 is not limited to the deburring process in the above two examples as long as the deburring of the opening 26 formed on the step surface is performed in both the forward rotation and the reverse rotation. Absent. It is also possible to switch between forward and backward movement of the tool 10 and switch between forward rotation and reverse rotation of the tool 10 and deburr each opening 26 in an arbitrary order.

  10: Deburring tool 20: Work piece 22, 22a, 22b: Hole 26: Opening 30: Tool body 32: Quill [oscillating body] 50: Rod [biasing mechanism] 54: Compression coil spring [elastic body], [biasing] Mechanism] 60, 62: Throw away tip 64: First blade 66: Second blade 68: Third blade 70: Fourth blade L: Tool axis O: Oscillating axis

Claims (8)

A deburring tool for deburring formed at the opening of a hole,
A main body that is rotated forward and backward around a tool axis that is a rotation axis of the deburring tool;
A swing supported by the main body so as to extend in the direction in which the tool axis extends from the main body, rotated forward and backward together with the main body, and swingable about a swing axis intersecting the tool axis. Moving body,
An urging mechanism that urges the oscillating body to reduce the amount of oscillating by an elastic force of the elastic body;
(A) a first blade for removing burrs in forward rotation; and (b) a second blade for removing burrs in reverse rotation. Deburring tool. The deburring tool is a tool for deburring formed at each of the openings at both ends of the through hole,
The first blade and the second blade are in contact with one of the openings at both ends of the through hole to remove a burr formed on one of the two,
The deburring tool is further
(C) a third blade for removing burrs formed on the other side in forward rotation, and (d) in reverse rotation. The deburring tool according to claim 1, further comprising a fourth blade for deburring formed on the other side.   Using the swing of the swinging body, any part of the swinging body where the first blade, the second blade, the third blade, or the fourth blade is provided passes through the through hole. The deburring tool according to claim 2, wherein the deburring tool is configured to be possible.   Any of the first blade, the second blade, the third blade, and the fourth blade has an R-shaped end that contacts the inner peripheral surface of the through hole when they pass through the through hole. The deburring tool according to claim 3, wherein   Two of the first blade, the second blade, the third blade, and the fourth blade are provided in two sets close to each other in the tool axis direction, and the two sets are the tool In the direction in which the axis extends, the first blade, the second blade, the third blade, and the fourth blade are not in contact with the opening in a state where the two sets are located with the through hole interposed therebetween. The deburring tool according to claim 3 or 4, which is provided with an interval of.   The deburring tool according to claim 5, wherein the first blade and the third blade constitute one of the two sets, and the second blade and the fourth blade constitute the other of the two sets. Two throwaway tips are attached to the rocking body,
One of two adjacent sides of one of the two throwaway tips functions as the first blade, the other functions as the third blade, and the other of the two adjacent sides of the two throwaway tips. The deburring tool according to claim 6, wherein one functions as the second blade and the other functions as the fourth blade.   The deburring method formed in the opening of a hole using the deburring tool as described in any one of Claim 1 thru | or 7.

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