JP7356877B2 - Chamfering device - Google Patents

Description

The present invention relates to a chamfering device for chamfering corners of a workpiece.

A chamfering device for chamfering a linearly extending corner of a workpiece is known. A chamfering device usually includes a device body that includes a drive unit such as an electric motor or an air motor, a rotating shaft that is rotationally driven by the drive unit, and a cutting tip fixed to the tip of the rotating shaft, and a device that is attached to the device body. A guide member for positioning the chamfering machine with respect to the workpiece is provided. The guide member has two guide surfaces that are in contact with the top and side surfaces of the workpiece, and the chamfering device is moved along the corner with each guide surface in contact with each side of the workpiece. By guiding the workpiece by the rotating cutting tip, the corners of the workpiece are cut and chamfered.

There are two methods for chamfering straight-line corners: shoulder milling and face milling. Shoulder milling means that the rotational axis of the rotary shaft is approximately perpendicular to the upper surface of the workpiece, and the corner is cut using the inclined blade of the cutting tip at a position near the right side of the rotational axis with respect to the direction of travel. Refers to the type of cutting performed. In addition, face milling is a state in which the axis of rotation is inclined approximately 45 degrees with respect to the top and side surfaces of the workpiece, and the corner is cut by the corner blade of the cutting tip at the front or rear position of the axis of rotation with respect to the direction of movement. This refers to a cutting mode that performs cutting. In a chamfering device for face cutting, as shown in Patent Document 1, for example, two guide surfaces are usually inclined at 45 degrees to opposite sides with respect to the rotation axis of a rotating shaft, and are formed between the two guide surfaces. The corner of the space is offset laterally from the axis of rotation. When the chamfering device is advanced along the corner of the workpiece, the corner blade of the cutting tip rotates and cuts the corner of the workpiece at a forward position. That is, the cutting tip chamfers the corners of the workpiece by up-cutting. By performing chamfering by up-cutting, the chamfering device receives a backward force when the cutting tip cuts the workpiece, making it easier to adjust the speed at which the chamfering device moves forward. On the other hand, if the cutting is performed by down cutting, the chamfering device receives a forward force and tries to move forward, so the advancing speed increases and the cutting surface becomes rough, which is generally undesirable. Further, the rotation axis of the rotation shaft is inclined forward with respect to the direction in which the chamfering device is guided, that is, the direction along the corner of the workpiece. As a result, the corner of the workpiece is cut only when the corner blade passes through the front position with respect to the rotation axis, and does not cut when the corner blade passes through the rear position. Thereby, when the square blade portion passes through the rear position, the cut surface cut at the front position is not scratched and damaged, and the finish of the cut surface can be improved.

Patent No. 5258074

When a workpiece is chamfered using a chamfering machine with a forward-inclined rotational axis as described above, the chamfered cutting surface has a rear side in the direction in which the corner edge of the cutting tip passes, that is, a rotational axis. A burr is formed on the edge on the axis side. Such burrs will be removed as necessary after chamfering. However, if burrs are formed at such locations, it may be difficult to remove the burrs due to work space constraints, or even if burrs are removed, it may be difficult to achieve the desired finish. be. In such a case, a burr is formed on the opposite edge by separately preparing a chamfering device whose axis of rotation is tilted backward and performing the chamfering process. However, in order to change the side on which the burr is formed depending on the situation, it is necessary to prepare two different chamfering devices at the work site.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a chamfering device that can perform chamfering in a state where the axis of rotation of a rotating shaft is tilted forward and backward with respect to the direction of guidance by a guide member.

That is, the present invention
A chamfering device configured to chamfer a corner of a workpiece having a linearly extending corner formed between two surfaces, the chamfering device comprising:
a device housing;
a drive disposed within the device housing;
A rotator having a base portion rotatably held within the device housing and a distal end portion located outside the device housing, and drivingly connected to the drive portion and driven to rotate about a rotation axis. axis and
a cutting blade provided at the tip of the rotating shaft and having a square blade portion located at a position offset from the rotating axis;
a guide member mounting portion provided on the device housing;
The first and second guides are attached to the guide member attachment portion and have a first guide surface that comes into contact with one surface of the workpiece and a second guide surface that comes into contact with the other surface of the workpiece. A guide member configured to guide the chamfering device along a corner of the workpiece by sliding a surface on each side of the workpiece, the first and second guides When the surface comes into contact with each surface of the work material, the axis of rotation is at a position shifted from the corner of the work material, and the first and second guide surfaces are placed on each surface of the work material. When the chamfering device is moved forward in the guide direction along the corner of the workpiece by sliding, the corner blade of the rotationally driven cutting blade rotates to move forward when the workpiece is moved forward. a guide member configured to cut a corner of the
Equipped with
the guide member is in a forward-inclined configuration in which the axis of rotation is inclined forward with respect to the guiding direction, so that the corner blade portion of the cutting blade chamfers the corner portion at a position forward of the axis of rotation; It is possible to switch between a backward tilting mode in which the rotational axis is tilted backward with respect to the guide direction, and the corner blade portion of the cutting blade chamfers the corner at a position rearward of the rotational axis. The present invention provides a chamfering device.

In this chamfering device, the guide member is designed to switch between a forward-tilted configuration and a backward-tilted configuration, so chamfering can be performed with the rotational axis tilted forward and chamfering with the rotational axis tilted backward. It becomes possible to selectively perform processing.

Also,
The guide member has a guide member main body fixed to the guide member attachment portion, and a guide surface constituent member having the first and second guide surfaces and detachably attached to the guide member main body,
The guide surface constituent member has a first end and a second end located at both ends in the guide direction,
When the guide surface forming member is attached to the guide member main body so that the first end is in the forward position and the second end is in the rear position, the guide member assumes the forward tilted configuration,
When the guide surface constituting member is attached to the guide member main body so that the second end portion is in the forward position and the first end portion is in the rear position, the guide member is configured to take the rearward tilted configuration. I can do it.

in particular,
The guide surface constituent member has a first guide plate having the first guide surface and a second guide plate having the second guide surface,
The guide member main body has a first holding surface that holds the first guide plate and a second holding surface that holds the second guide plate,
The first and second guide plates are each removably attached to the guide member main body,
The first guide plate has a first mounting surface attached to the first holding surface, and the first guide surface is directed away from the first mounting surface from the first end toward the second end. It is inclined to
The second guide plate has a second attachment surface attached to the second holding surface, and the second guide surface is directed away from the second attachment surface from the first end toward the second end. Can be tilted to.

Furthermore,
The first and second guide plates have both side edges extending between the first end and the second end, and a recess is formed at a substantially central position of each of the side edges, and When the first and second guide plates are attached to the guide member main body, an opening is formed by the recess of the first guide plate and the recess of the second guide plate, and the cutting blade is rotated. The corner blade portion may protrude from the opening to chamfer the corner of the workpiece.

Also,
The square blade portion of the cutting blade includes a tip end portion extending in a direction substantially perpendicular to the rotation axis, an outer cutter portion extending from the tip tip portion toward the outside in the radial direction of the rotation axis, and the tip tip portion. an inner cutter portion extending from the inner blade portion toward the inner side in the radial direction of the rotating shaft;
When the guide member is in the forward tilted configuration, the outer cutter portion of the corner blade portion chamfers the corner of the workpiece, and when the guide member is in the backward tilted configuration, the inner cutter of the corner blade portion chamfers the corner of the workpiece. The corners of the workpiece can be chamfered at certain points.

Since cutting is performed using different parts of the cutting blade in the forward and backward tilting modes, it is possible to extend the life of the cutting blade by appropriately switching between the forward and backward tilting modes while using the chamfering device. becomes.

Moreover, it is possible to further include a cutting tip that is removably attached to the tip of the rotating shaft and constitutes the cutting blade.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a chamfering device according to the present invention will be described based on the accompanying drawings.

FIG. 1 is a front view of a chamfering device according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II in FIG. 1, showing a state in which the guide member is in a forward-inclined configuration. 3 is a partially enlarged sectional view taken along line III-III in FIG. 2. FIG. It is a top view of a guide plate. FIG. 5 is a side view of the guide plate of FIG. 4; FIG. 6 is a side view showing the positional relationship between the cutting tip and the workpiece during chamfering when the guide member is in a forward-inclined configuration. FIG. 7 is a plan view showing the positional relationship between the cutting tip and the workpiece during chamfering when the guide member is in a forward-inclined configuration. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, showing a state in which the guide member is in a backwardly tilted configuration. FIG. 6 is a side view showing the positional relationship between the cutting tip and the workpiece during chamfering when the guide member is in a backward-inclined configuration. FIG. 6 is a plan view showing the positional relationship between the cutting tip and the workpiece during chamfering when the guide member is in a backward-inclined configuration. It is a figure which shows the cutting tip of another form. It is a figure which shows the cutting tip of still another form.

A chamfering device 1 according to an embodiment of the present invention includes a device main body 10 and a guide member 30 attached to the device main body 10, as shown in FIGS. 1 and 2.

As shown in FIG. 2, the device main body 10 includes a device housing 12, an electric motor (drive unit) 14 disposed within the device housing 12, and a drive shaft 16 of the electric motor 14 that is drive-coupled via a gear mechanism 18. The rotating shaft 20 is provided with a rotating shaft 20. The rotating shaft 20 has a base portion 20 a rotatably held within the device housing 12 and a tip portion 20 b located outside the device housing 12 . The device main body 10 further includes a cutting tip 22 that is detachably attached to the tip 20b of the rotating shaft 20 and is rotationally driven together with the rotating shaft 20. As shown in FIG. 3, the cutting tip 22 has a pentagonal shape as a whole, and a cutting edge 23 is formed on the outer periphery of the cutting tip 22. The cutting blade 23 has five square blade parts, and when the cutting tip 22 is attached to the tip part 20b, one square blade part 24 moves toward the rotation axis 20 in the direction of the rotation axis R at a position deviated from the rotation axis R. It becomes a pointed position in the direction away from the base 20a. The device main body 10 further includes a guide member mounting portion 26 provided on the device housing 12 around the rotating shaft 20. Further, a male threaded portion 27 is formed in the device housing 12 near the guide member attachment portion 26, and an annular adjustment member 28 is screwed into this male threaded portion 27. The adjustment member 28 is configured to be displaced in the direction of the rotation axis R by rotating it around the rotation axis R with respect to the device housing 12.

The guide member 30 includes a plunger 31, a guide member main body 32 fixed to the guide member attachment part 26 of the device main body 10, and a first guide plate 34 and a second guide plate 36 that are removably attached to the guide member main body 32. Equipped with The guide member main body 32 includes an annular clamp portion 38 having an engagement inner circumferential surface 38a having a larger diameter than the engagement outer circumferential surface 26a of the guide member attachment portion 26, and a ring-shaped clamp portion 38 having an engagement outer circumferential surface 26a. A clamp mechanism 42 is provided, which includes a screw 39 for tightening and fixing, and a clamp lever 40 (FIG. 1) for rotating the screw 39. The plunger 31 is biased radially inward so that its tip protrudes inward from the engagement inner circumferential surface 38a. When the guide member attachment part 26 is inserted inside the clamp part 38 with the plunger 31 pulled radially outward and the plunger 31 is returned to a position where its tip protrudes inward from the engagement inner circumferential surface 38a, the plunger 31 is pulled radially outward. The tip of 31 engages with an annular groove 29 formed in adjustment member 28 . Thereby, the guide member 30 is held in the direction of the rotation axis R with respect to the apparatus main body 10. By operating the clamp lever 40 and tightening the screw 39 while the plunger 31 is engaged with the annular groove 29 of the adjustment member 28, the diameter of the clamp portion 38 is reduced and the engagement inner circumferential surface 38a becomes the engagement outer circumferential surface 26a. Through engagement, the guide member 30 is fixed to the device main body 10. As shown in FIG. 1, the guide member main body 32 has a first holding surface 44 for holding the first guide plate 34 and a second holding surface 46 for holding the second guide plate 36. The first guide plate 34 is fixedly held on the guide member main body 32 with the first mounting surface 34 a in contact with the first holding surface 44 . Similarly, the second guide plate 36 is fixedly held on the guide member main body 32 with the second mounting surface 36 a in contact with the second holding surface 46 . The first guide plate 34 has a first guide surface 34b on the surface opposite to the first mounting surface 34a, and the second guide plate 36 has a second guide surface 36b on the surface opposite to the second mounting surface 36a. are doing. As shown in FIG. 3, when the first guide surface 34b and the second guide surface 36b are brought into contact with each surface Ma, Mb of the workpiece M, the rotation axis R is aligned with the corner Mc of the workpiece M (see FIG. 3, which is already chamfered), is laterally shifted by a distance L, and is at a position that does not pass through the corner Mc. By bringing the first guide surface 34b and the second guide surface 36b of the guide member 30 into contact with each surface Ma, Mb of the workpiece M and sliding on each surface Ma, Mb, the chamfering device 1 is cut. The cutting material M is guided in a guiding direction along the linearly extending corner portion Mc.

As shown in FIGS. 4 and 5, the first guide plate 34 has a first end portion 34c and a second end portion 34c, which are both ends in the guiding direction (left and right direction in the figure) when attached to the guide member main body 32. It has an end 34d and both side edges 34e extending between the first end 34c and the second end 34d. An arcuate recess 34f is formed at the center of each side edge 34e. Further, the first guide surface 34b is inclined in a direction away from the first mounting surface 34a (downward as seen in FIG. 5) from the first end 34c toward the second end 34d. Note that a groove 34g is formed near the second end 34d of the first guide surface 34b, and this groove 34g is provided so that the first end 34c and the second end 34d can be easily distinguished. belongs to. The first guide plate 34 is further formed with four bolt holes 34h for passing bolts therethrough. The first guide plate 34 is attached to the guide member main body 32 by bolts passed through two of the bolt holes 34h. The second guide plate 36 has the same shape as the first guide plate 34, and like the first guide plate 34, is attached to the guide member main body 32 with bolts passed through four bolt holes. Note that bolts are omitted in the drawings. When the first guide plate 34 and the second guide plate 36 are attached to the guide member body 32, as can be seen from FIG. 3, one recess 34f of the first guide plate 34 and one recess 36f of the second guide plate 36 are facing each other to form an opening 48. The corner blade portion 24 of the cutting tip 22 protrudes from the opening 48 and chamfers the corner portion Mc of the workpiece M when driven to rotate.

When the first guide plate 34 is attached to the guide member main body 32 so that the first end 34c is at the front position in the guiding direction and the second end 34d is at the rear position, and the second guide plate 36 is attached in the same manner, As shown in FIG. 2, the rotation axis R is tilted forward with respect to the guide direction. In this state, the first guide surface 34b and the second guide surface 36b are brought into contact with each surface Ma, Mb of the workpiece M, and the rotating shaft 20 is rotationally driven, thereby moving the chamfering device 1 forward in the guide direction. Then, as shown in FIG. 6, the corner blade portion 24 of the rotationally driven cutting tip 22 cuts and chamfers the corner portion Mc at a position forward of the rotation axis R. At the rear position of the rotation axis R, the cutting tip 22 passes through a position away from the chamfered cutting surface Md. Therefore, when the rotation axis R is tilted forward, the cutting tip 22 cuts the workpiece M only at the front position of the rotation axis R, and does not touch the cutting surface Md at the rear position. In more detail, the square blade portion 24 of the cutting tip 22 includes a tip blade portion 24a extending substantially perpendicular to the rotation axis R, and an outer blade portion 24a extending toward the outside in the radial direction of the rotation shaft 20 from the tip blade portion 24a. It has a blade portion 24b and an inner blade portion 24c extending radially inward of the rotating shaft 20 from the tip blade portion 24a. Cutting with the rotational axis R tilted forward is mainly performed at the outer blade portion 24b of the square blade portion 24. Further, as shown in FIG. 7, the rotating direction of the rotating shaft 20 and the cutting tip 22 is clockwise as seen in the figure, and the corner blade portion 24 of the cutting tip 22 is rotated so that the corner portion Mc It is designed to cut. That is, the cutting tip 22 performs chamfering by up-cutting. In this case, burrs due to cutting are formed on the edge Me of the cutting surface Md on the side closer to the rotation axis R (upper side in the figure).

The first guide plate 34 and the second guide plate 36 can also be attached to the guide member main body 32 with the front and back in the guiding direction reversed. That is, the first guide plate 34 is attached to the guide member main body 32 so that the second end 34d is at the front position in the guiding direction and the first end 34c is at the rear position, and the second guide plate 36 is attached in the same manner. Then, as shown in FIG. 8, the rotation axis R is tilted backward in the guide direction. In this state, the first guide surface 34b and the second guide surface 36b are brought into contact with each surface Ma, Mb of the workpiece M, and the rotating shaft 20 is rotationally driven, thereby moving the chamfering device 1 forward in the guide direction. As shown in FIG. 9, the rotationally driven cutting tip 22 passes through a position away from the workpiece M at a position forward of the rotation axis R, does not cut the corner Mc, and cuts the rotation axis R. Corner portion Mc is cut and chamfered at the rear position. Therefore, when the rotation axis R is tilted backward, the cutting tip 22 cuts the workpiece M only at the rear position of the rotation axis R, and does not cut at the front position. Cutting with the rotational axis R tilted backward is mainly performed at the inner blade portion 24c of the square blade portion 24. Further, as shown in FIG. 10, the corner blade portion 24 of the cutting tip 22 is configured to cut the corner portion Mc at a position facing forward by rotation. That is, the cutting tip 22 performs chamfering by up-cutting even at the rear position. In this case, burrs due to cutting are formed on the edge Mf of the cutting surface Md on the side far from the rotation axis R (lower side in the figure).

Before attaching the guide member 30 to the adjustment member 28 or before attaching it to the adjustment member 28 and fixing it to the guide member attachment portion 26 of the device housing 12, the adjustment member 28 is rotated to adjust the position in the direction of the rotation axis R. By doing so, the mounting position of the guide member 30 in the direction of the rotation axis R with respect to the apparatus main body 10 can be adjusted. Thereby, the amount by which the cutting blade 23 of the cutting tip 22 protrudes from the guide surfaces 34b, 36b can be adjusted, and the amount of chamfering of the workpiece M can be adjusted. An annular memory member 50 is attached to the outside of the adjustment member 28, and by adjusting the adjustment member 28 based on the memory engraved in the memory member 50, the amount of chamfering can be adjusted to an arbitrary value. Note that the memory member 50 is rotatable relative to the adjustment member 28, and after adjusting the position of the memory member 50 so that the memory of the memory member 50 and the actual chamfer amount are the same, the memory member 50 is adjusted with the setscrew 52. The member 50 can be fixed to the adjustment member 28.

In the chamfering device 1, by attaching the first guide plate 34 and the second guide plate 36 in different directions, the rotation axis R of the rotation shaft 20 is tilted forward with respect to the guiding direction. The guide member 30 is configured to switch between a backward tilting mode in which the rotation axis R is tilted backward with respect to the guide direction. Therefore, in the chamfering device 1, it is possible to selectively perform chamfering with the rotation axis R tilted forward and chamfering with the rotation axis R tilted backward. Thereby, the side on which burrs are formed due to cutting can be arbitrarily changed. In addition, in the forward tilting mode, cutting is mainly performed with the outer blade portion 24b of the cutting tip 22, and in the backward tilting mode, cutting is mainly performed with the inner blade portion 24c of the cutting tip 22, so that the forward tilting mode and the backward tilting mode are appropriately controlled. By using the chamfering device 1 while switching, it is also possible to greatly extend the life of the cutting tip 22.

As the cutting tip, instead of the pentagonal cutting tip 22 described above, a cutting tip 122 as shown in FIG. 11 can also be used. This cutting tip 122 is attached to the tip 120b of the rotating shaft 120. The square blade portion 124 of the cutting tip 122 includes a sharp tip end portion 124a, and an outer blade portion 124b extending radially outward from the tip end portion 124a at an angle of 45 degrees with respect to the rotation axis R. , and an inner blade portion 124c extending from the tip blade portion 124a toward the inner side in the radial direction of the rotation shaft 120 at right angles to the rotation axis R. The square blade portion 124 is pointed diagonally downward to the right in the figure, but is pointed away from the base 120a of the rotation shaft 120 at least in the direction of the rotation axis R. In addition, in the cutting tip 222 shown in FIG. 12, the tip end portion 224a between the outer blade portion 224b and the inner blade portion 224c of the square blade portion 224 is oriented away from the base 120a of the rotation shaft 120 in the direction of the rotation axis R. It has a generally pointed shape and a slightly rounded arc shape. The shape of the cutting tip can be changed arbitrarily, and in addition to the shape of the cutting tips 22, 122, and 222, it may be other polygonal shapes such as a quadrangle or a triangle.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. For example, the guide surface constituting member that constitutes the first guide surface and the second guide surface may be an L-shaped member that integrates the first guide plate and the second guide plate, for example. Further, the guide surface constituent member swings relative to the guide member body around a horizontal axis perpendicular to the rotation axis and the guiding direction, thereby tilting the first and second guide surfaces in an arbitrary direction with respect to the rotation axis. Accordingly, it is also possible to configure the device to switch between a forward-leaning form and a backward-leaning form. Moreover, an air motor can also be used as a drive part. Although the above embodiment is a hand-held chamfering device, it may be a stationary chamfering device that performs chamfering by moving the workpiece relative to the chamfering device. The shape of the cutting tip can be changed arbitrarily, and may be, for example, other polygonal shapes such as a square or a triangle. Further, the cutting blade may be formed directly on the tip of the rotating shaft. The chamfering device according to the present invention can be used not only for chamfering as finishing work on a member, but also for chamfering for beveling a base material to be welded.

1 Chamfering device 10 Device main body 12 Device housing 14 Electric motor (drive unit)
16 Drive shaft 18 Gear mechanism 20 Rotating shaft 20a Base 20b Tip part 22 Cutting tip 23 Cutting blade 24 Square blade part 24a Tip blade part 24b Outer blade part 24c Inner blade part 26 Guide member mounting part 26a Engagement outer peripheral surface 27 Male thread part 28 Adjustment member 29 Annular groove 30 Guide member 31 Plunger 32 Guide member main body 34 First guide plate 34a First mounting surface 34b First guide surface 34c First end 34d Second end 34e Both side edges 34f Recess 34g Groove 34h Bolt hole 36 Second guide plate 36a Second mounting surface 36b Second guide surface 36f Recess 38 Clamp portion 38a Engagement inner peripheral surface 39 Screw 40 Clamp lever 42 Clamp mechanism 44 First holding surface 46 Second holding surface 48 Opening 50 Memory member 52 Set screw 120 Rotating shaft 120b Tip part 122 Cutting tip 124 Square blade part 124a Tip blade part 124b Outer blade part 124c Inner blade part 222 Cutting tip 224 Square blade part 224a Tip blade part 224b Outer blade part 224c Inner blade part L Distance M Work material Ma Surface Mb Surface Mc Corner Md Cutting surface Me Edge Mf Edge R Rotation axis

Claims (6)

A chamfering device configured to chamfer a corner of a workpiece having a linearly extending corner formed between two surfaces, the chamfering device comprising:
a device housing;
a drive disposed within the device housing;
A rotator having a base portion rotatably held within the device housing and a distal end portion located outside the device housing, and drivingly connected to the drive portion and driven to rotate about a rotation axis. axis and
a cutting blade provided at the tip of the rotating shaft and having a square blade portion located at a position offset from the rotating axis;
a guide member mounting portion provided on the device housing;
The first and second guides are attached to the guide member attachment portion and have a first guide surface that comes into contact with one surface of the workpiece and a second guide surface that comes into contact with the other surface of the workpiece. A guide member configured to guide the chamfering device along a corner of the workpiece by sliding a surface on each side of the workpiece, the first and second guides When the surface comes into contact with each surface of the work material, the axis of rotation is at a position shifted from the corner of the work material, and the first and second guide surfaces are placed on each surface of the work material. When the chamfering device is moved forward in the guide direction along the corner of the workpiece by sliding, the corner blade of the rotationally driven cutting blade rotates to move forward when the workpiece is moved forward. a guide member configured to cut a corner of the
Equipped with
the guide member is in a forward-inclined configuration in which the axis of rotation is inclined forward with respect to the guiding direction, so that the corner blade portion of the cutting blade chamfers the corner portion at a position forward of the axis of rotation; It is possible to switch between a backward tilting mode in which the rotational axis is tilted backward with respect to the guide direction, and the corner blade portion of the cutting blade chamfers the corner at a position rearward of the rotational axis. chamfering device. The guide member has a guide member main body fixed to the guide member attachment portion, and a guide surface constituent member having the first and second guide surfaces and detachably attached to the guide member main body,
The guide surface constituent member has a first end and a second end located at both ends in the guide direction,
When the guide surface forming member is attached to the guide member main body so that the first end is in the forward position and the second end is in the rear position, the guide member assumes the forward tilted configuration,
When the guide surface constituting member is attached to the guide member main body so that the second end is in the forward position and the first end is in the rear position, the guide member assumes the rearward tilted configuration. , A chamfering device according to claim 1. The guide surface constituent member has a first guide plate having the first guide surface and a second guide plate having the second guide surface,
The guide member main body has a first holding surface that holds the first guide plate and a second holding surface that holds the second guide plate,
The first and second guide plates are each removably attached to the guide member main body,
The first guide plate has a first mounting surface attached to the first holding surface, and the first guide surface is directed away from the first mounting surface from the first end toward the second end. It is inclined to
The second guide plate has a second attachment surface attached to the second holding surface, and the second guide surface is directed away from the second attachment surface from the first end toward the second end. 3. The chamfering device according to claim 2, wherein the chamfering device is inclined at . The first and second guide plates have both side edges extending between the first end and the second end, and a recess is formed at a substantially central position of each of the side edges, and When the first and second guide plates are attached to the guide member main body, an opening is formed by the recess of the first guide plate and the recess of the second guide plate, and the cutting blade is rotated. 4. The chamfering device according to claim 3, wherein the corner blade protrudes from the opening to chamfer a corner of the workpiece. The square blade part of the cutting blade includes a tip blade part and an outer blade part extending from the tip blade part in a direction inclined to the rotation axis in a direction toward the base in a direction outward in the radial direction of the rotation axis. and an inner blade portion extending from the tip blade portion toward the radial inner side of the rotation axis in a direction perpendicular to the rotation axis or in a direction inclined to the rotation axis in a direction approaching the base; It has
When the guide member is in the forward tilted configuration, the outer cutter portion of the corner blade portion chamfers the corner of the workpiece, and when the guide member is in the backward tilted configuration, the inner cutter of the corner blade portion chamfers the corner of the workpiece. The chamfering device according to any one of claims 1 to 4, wherein the chamfering device chamfers a corner of a workpiece in sections. The chamfering device according to any one of claims 1 to 5, further comprising a cutting tip that is detachably attached to the tip of the rotating shaft and constitutes the cutting blade.

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