JP2021079515A - Device main body of chamfering device and chamfering device - Google Patents

Abstract

To provide a chamfering device configured to perform chamfering processing in different modes.SOLUTION: A chamfering device 1 comprises a device main body 10 and a plurality of kinds of guide members that are selectively mounted on the device main body 10. The plurality of kinds of guide members include a guide member 100 for linear shoulder grinding, a guide member 200 for front face grinding, and a guide member 300 for curve shoulder grinding. When the guide member 100 for linear shoulder grinding is mounted on the main body, the chamfering device 1 performs chamfering by cutting a corner part extending linearly of a material to be cut with an inclined cutting part 23b of a cutting chip 22. When the guide member 200 for front face grinding is mounted, the chamfering device 1 performs chamfering by cutting the corner part extending linearly of the material to be cut with a corner cutting part 23a of the cutting chip 22. When the guide member 300 for curve shoulder grinding is mounted, the chamfering device 1 performs chamfering by cutting the corner part extending linearly of the material to be cut with the inclined cutting part 23b of the cutting chip 22.SELECTED DRAWING: Figure 1

Description

The present invention relates to a chamfering device for chamfering a corner portion of a work material.

A chamfering device for chamfering the corners of a work material is known. The chamfering device is usually attached to a device body having a drive unit such as an electric motor or an air motor, a rotation shaft rotationally driven by the drive unit, and a cutting tip fixed to the tip of the rotation shaft, and a device body. A guide member for positioning the chamfering machine with respect to the work material is provided. In a chamfering device for chamfering a linearly extending corner portion defined by two planes, the guide member has two guide surfaces that are in contact with the upper surface and the side surface of the work material. By advancing the chamfering device along the corners with each guide surface in contact with the upper surface and the side surface of the work material, the corners are cut and chamfered by the rotating cutting tip. There is. There are two methods of chamfering the corners extending in a straight line: shoulder cutting and front cutting. Here, shoulder cutting means that the rotation axis of the rotation axis is substantially perpendicular to the upper surface of the work material, and the corners are cut by the inclined blade portion of the cutting tip at a position near the side of the rotation axis with respect to the traveling direction. The form of cutting to be performed. In frontal cutting, the rotation axis is tilted by approximately 45 degrees with respect to the upper surface and side surfaces of the work material, and the corners are formed by the square blade of the cutting tip at the front or rear position of the rotation axis with respect to the traveling direction. Refers to the cutting mode in which the cutting is performed. In the chamfering device in which chamfering is performed by shoulder cutting, the guide member is configured so that one of the two guide surfaces extends at right angles to the rotation axis and the other extends parallel to the rotation axis (patented). Document 1). Further, in the chamfering device in which chamfering is performed by front cutting, the guide members are configured so that the two guide surfaces are inclined by 45 degrees with respect to the rotation axis (Patent Document 2). There is also a chamfering machine for chamfering curved corners such as the edge of a circular hole, in which the guide member has a guide surface that abuts on the upper surface and at the tip of the rotation axis. It has a guide roller, and the chamfering device is moved along a curved corner in a state where it is in contact with the guide surface and the upper surface and the guide roller is in contact with the curved side surface ( Patent Document 3).

Japanese Patent No. 3707519 Japanese Patent No. 5258074 Japanese Patent No. 3205514

As described above, chamfering of the corners of the work material is performed in various forms. There are two methods for chamfering the corners of the work material: shoulder cutting and front cutting, but the ease of processing, the finished state of the machined surface, and the presence or absence of burrs differ depending on which is selected. Therefore, the worker needs to properly use the chamfering device for shoulder cutting and the chamfering device for front cutting depending on the situation. Further, when chamfering a corner portion extending in a curved shape, it is necessary to use a chamfering device dedicated to the chamfering. As described above, it is necessary to prepare a plurality of chamfering devices in order to perform various chamfering processes.

Therefore, an object of the present invention is to provide an apparatus main body of a chamfering apparatus capable of selectively performing chamfering in different forms, and a chamfering apparatus including the apparatus main body.

That is, the present invention
It is the main body of the chamfering device that chamfers the corners of the work material.
Equipment housing and
A drive unit arranged in the device housing and
Rotation that has a base that is rotatably held in the device housing within the device housing and a tip that is located outside the device housing, is drive-coupled to the drive unit, and is rotationally driven around a rotation axis. Axis and
A square blade portion provided at the tip portion of the rotating shaft and located at a position deviated from the rotating axis, and inclined outward in the radial direction in a direction approaching the base portion in the direction of the rotating axis from the square blade portion. A cutting blade with an inclined blade and
A guide member mounting portion provided in the device housing so that the shoulder-cutting guide member and the front-cutting guide member can be interchangeably mounted.
With
When the shoulder cutting guide member is attached to the guide member mounting portion, the cutting blade is rotationally driven when the device main body is guided along the corner portion of the work material by the shoulder cutting guide member. The inclined blade portion cuts a corner portion of the work material to chamfer the corner portion.
When the front cutting guide member is attached to the guide member mounting portion, the cutting blade is rotationally driven when the device main body is guided along the corner portion of the work material by the front cutting guide member. Provided is an apparatus main body capable of cutting a corner portion of a work material by the square blade portion and chamfering the corner portion.

In the main body of the chamfering device, the guide member for shoulder cutting and the guide member for front cutting are interchangeably attached, and when the guide member for shoulder cutting is attached, the inclined blade portion of the cutting blade is attached. When a guide member for front cutting is attached, chamfering is performed by the square blade portion of the cutting blade. Therefore, any guide member can be selectively used according to the required chamfering form, and the chamfering in different forms can be performed by one device main body.

Also,
Further provided with a guide roller detachably attached to the tip of the rotating shaft so that it can rotate around the rotating axis.
The shoulder cutting guide member is a curved shoulder cutting guide member for chamfering a curved corner portion of the work material.
When the curved shoulder cutting guide member is attached to the guide member mounting portion, the curved shoulder cutting guide member is brought into contact with one plane defining the corner portion, and the guide roller attached to the rotating shaft is brought into contact with the guide member. By abutting against the other curved surface that defines the corner, the device body can be guided along the curved corner.

Further, a cutting tip that is detachably attached to the tip of the rotating shaft to form the cutting blade can be further provided.

The present invention further
A chamfering device designed to chamfer the corners of the work material.
With the above-mentioned device body
A plurality of types of guide members selectively attached to the guide member attachment portion of the apparatus main body, and
With
The plurality of types of guide members
The main body of the device is guided along the linearly extending corners of the work material, and the corners are cut by the square blades of the rotationally driven cutting blade to chamfer the corners. The main body of the device is guided along the linearly extending corners of the front cutting guide member and the work material, and the corners are cut by the inclined cutting blade of the rotationally driven cutting blade. A guide member for straight shoulder cutting that chamfers the corners, and the inclined blade portion of the cutting blade that is rotationally driven by guiding the main body of the device along the curved corners of the work material. At least one guide member for shoulder cutting, which is a curved shoulder cutting guide member for cutting the corner portion and chamfering the corner portion.
Provide a chamfering device including.

further,
The guide member mounting portion has an engaging outer peripheral surface located around the rotating shaft.
Each of the plurality of types of guide members has an annular clamp portion having an engagement inner peripheral surface having a diameter larger than that of the engagement outer peripheral surface, and a clamp portion for tightening and fixing the clamp portion to the engagement outer peripheral surface. It is possible to have a clamp mechanism composed of a tightening member.

In this case, the clamp mechanisms of the plurality of types of guide members can be made to have the same shape.

Moreover,
Further, an annular adjusting member whose main body is screwed into the device housing at a position around the rotation axis and is displaced in the direction of the rotation axis by rotating with respect to the device housing. Prepare,
By displacing the adjusting member in the direction of the rotation axis, the position of the guide member attached to the guide member mounting portion in the direction of the rotation axis is adjusted so that the chamfering amount by the cutting blade is adjusted. be able to.

Hereinafter, embodiments of the chamfering apparatus according to the present invention will be described with reference to the accompanying drawings.

It is a figure which shows the chamfering apparatus which concerns on one Embodiment of this invention. It is a front view of the apparatus main body shown in FIG. It is a side sectional view of the apparatus main body of FIG. It is a front view of the guide member for straight shoulder cutting. It is a side view of the guide member for straight shoulder cutting of FIG. It is a front view of the guide member for front cutting. It is a side view of the guide member for front cutting of FIG. It is a front view of the guide member for curved shoulder cutting. It is a side view of the guide member for curved shoulder cutting of FIG. It is a front view of the chamfering apparatus in the state which attached the guide member for straight shoulder cutting of FIG. 4 to the apparatus main body of FIG. It is a side sectional view of the chamfering apparatus of FIG. It is a front view of the chamfering apparatus in the state which attached the guide member for front cutting of FIG. 6 to the apparatus main body of FIG. It is a side sectional view of the chamfering apparatus of FIG. It is a front view of the chamfering apparatus in the state which attached the guide member for the curved shoulder cutting of FIG. 8 to the apparatus main body of FIG. It is a side sectional view of the chamfering apparatus of FIG. 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.

As shown in FIG. 1, the chamfering device 1 according to an embodiment of the present invention includes a device main body 10, a guide member 100 for straight shoulder cutting, a guide member 200 for front cutting, and a guide member 300 for curved shoulder cutting. A plurality of types of guide members are provided, and the plurality of types of guide members are selectively attached to the apparatus main body 10 for use.

As shown in FIGS. 2 and 3, the apparatus main body 10 is connected to the apparatus housing 12, the electric motor (drive unit) 14 arranged in the apparatus housing 12, and the drive shaft 16 of the electric motor 14 via the gear mechanism 18. It is provided with a rotary shaft 20 which is driven and connected. The rotating shaft 20 has a base portion 20a rotatably held by the device housing 12 inside the device housing 12 and a tip portion 20b located outside the device housing 12. The apparatus main body 10 further includes a cutting tip 22 that is detachably attached to the tip portion 20b of the rotating shaft 20 and is rotationally driven together with the rotating shaft 20. The cutting tip 22 has a pentagonal shape as a whole, and a cutting blade 23 is formed on the outer periphery thereof. The cutting blade 23 has five square blade portions 23a and five inclined blade portions 23b. When the cutting tip 22 is attached to the tip portion 20b, one square blade portion 23a becomes a pointed position in the direction of the rotation axis R at a position deviated from the rotation axis R and away from the base portion 20a of the rotation axis 20. One inclined blade portion 23b is positioned so as to be inclined outward in the radial direction in a direction approaching the base portion 20a in the direction of the rotation axis R. The apparatus main body 10 further includes a guide member mounting portion 24 provided on the apparatus housing 12 around the rotating shaft 20. Further, a male screw portion 26 is formed in the device housing 12 near the guide member mounting portion 24, and an annular adjusting member 28 is screwed into the male screw portion 26. The adjusting member 28 is displaced in the direction of the rotation axis R by rotating the device housing 12 around the rotation axis R.

As shown in FIGS. 4 and 5, the straight shoulder cutting guide member 100 includes a plunger 101, a clamp mechanism 102 fixed to a guide member mounting portion 24 of the apparatus main body 10, a first guide plate 104, and a second guide. A plate 106 is provided. The clamp mechanism 102 engages with a tubular clamp portion 108 having an engaging inner peripheral surface 108a (FIG. 11) having a diameter larger than that of the engaging outer peripheral surface 24a of the guide member mounting portion 24, and the clamping portion 108. It has a screw (tightening member) 109 for tightening and fixing to 24a, and a clamp lever 110 for turning the screw 109. The plunger 101 is urged inward in the radial direction so that its tip protrudes inward from the engaging inner peripheral surface 108a. When the guide member mounting portion 24 is inserted inside the clamp portion 108 with the plunger 101 pulled outward in the radial direction and the tip of the plunger 101 is returned to a position where the tip of the plunger 101 protrudes inward from the engaging inner peripheral surface 108a, the plunger is returned. The tip of 101 engages with the annular groove 30 formed in the adjusting member 28. As a result, the straight shoulder cutting guide member 100 is held in the direction of the rotation axis R with respect to the apparatus main body 10. By operating the clamp lever 110 and tightening the screw 109 while the plunger 101 is engaged with the annular groove 30 of the adjusting member 28, the diameter of the clamp portion 108 is reduced and the engaging inner peripheral surface 108a is engaged with the engaging outer peripheral surface 24a. The straight shoulder cutting guide member 100 is fixed to the apparatus main body 10 by engaging with. The first guide plate 104 defines the first guide surface 104a, and the second guide plate 106 defines the second guide surface 106a. As shown in FIGS. 10 and 11, in a state where the straight shoulder cutting guide member 100 is attached to the apparatus main body 10, the first guide surface 104a is perpendicular to the rotation axis R, and the second guide surface 106a is the rotation axis. It is parallel to R. By bringing the first guide surface 104a into contact with the upper surface of the work material and the second guide surface 106a with the side surface of the work material, the chamfering device 1 is brought into contact with the corner portion extending linearly of the work material. It is designed to guide you. The corners of the work material are cut and chamfered by the inclined blade portion 23b of the cutting tip 22.

As shown in FIGS. 6 and 7, the front cutting guide member 200 includes a plunger 201, a clamp mechanism 202 fixed to a guide member mounting portion 24 of the apparatus main body 10, a first guide plate 204, and a second guide plate. It is equipped with 206. The clamp mechanism 202 engages with a tubular clamp portion 208 having an engaging inner peripheral surface 208a (FIG. 13) having a diameter larger than that of the engaging outer peripheral surface 24a of the guide member mounting portion 24, and an engaging outer peripheral surface. It has a screw (tightening member) 209 for tightening and fixing to 24a, and a clamp lever 210 for turning the screw 209. The plunger 201 is urged inward in the radial direction so that its tip protrudes inward from the engaging inner peripheral surface 208a. When the guide member mounting portion 24 is inserted inside the clamp portion 208 with the plunger 201 pulled outward in the radial direction and the tip of the plunger 201 is returned to a position where the tip of the plunger 201 protrudes inward from the engaging inner peripheral surface 208a, the plunger is returned. The tip of 201 engages with the annular groove 30 formed in the adjusting member 28. As a result, the front shoulder cutting guide member 200 is held in the direction of the rotation axis R with respect to the device main body 10. By operating the clamp lever 210 and tightening the screw 209 while the plunger 201 is engaged with the annular groove 30 of the adjusting member 28, the diameter of the clamp portion 208 is reduced and the engaging inner peripheral surface 208a is engaged with the engaging outer peripheral surface 24a. The front cutting guide member 200 is fixed to the apparatus main body 10 by engaging with. The first guide plate 204 defines the first guide surface 204a, and the second guide plate 206 defines the second guide surface 206a. As shown in FIGS. 12 and 13, in a state where the front cutting guide member 200 is attached to the apparatus main body 10, the first guide surface 204a and the second guide surface 206a are each tilted 45 degrees with respect to the rotation axis R. It becomes a state. By bringing the first guide surface 204a into contact with the upper surface of the work material and the second guide surface 206a with the side surface of the work material, the chamfering device 1 is brought into contact with the corner portion extending linearly of the work material. It is designed to guide you. The corner portion of the work material is cut and chamfered by the square blade portion 23a of the cutting tip 22.

As shown in FIGS. 8 and 9, the curved shoulder cutting guide member 300 includes a plunger 301, a clamp mechanism 302 fixed to the guide member mounting portion 24 of the apparatus main body 10, and a guide plate 304. The clamp mechanism 302 tightens and fixes a tubular clamp portion 308 having an engaging inner peripheral surface 308a having a diameter larger than the engaging outer peripheral surface 24a of the guide member mounting portion 24 and the clamp portion 308 to the engaging outer peripheral surface 24a. It has a screw (tightening member) 309 for turning the screw 309 and a clamp lever 310 for turning the screw 309. The plunger 301 is urged inward in the radial direction so that its tip protrudes inward from the engaging inner peripheral surface 308a. When the guide member mounting portion 24 is inserted inside the clamp portion 308 with the plunger 301 pulled outward in the radial direction and the tip of the plunger 301 is returned to a position where the tip of the plunger 301 protrudes inward from the engaging inner peripheral surface 308a, the plunger is returned. The tip of 301 engages with the annular groove 30 formed in the adjusting member 28. As a result, the curved shoulder cutting guide member 300 is held in the direction of the rotation axis R with respect to the device main body 10. By operating the clamp lever 310 and tightening the screw 309 while the plunger 301 is engaged with the annular groove 30 of the adjusting member 28, the diameter of the clamp portion 308 is reduced and the engaging inner peripheral surface 308a (FIG. 15) is engaged. The curved shoulder cutting guide member 300 is fixed to the apparatus main body 10 by engaging with the outer peripheral surface 24a. The guide plate 304 defines an annular guide surface 304a. As shown in FIGS. 14 and 15, when the curved shoulder cutting guide member 300 is attached to the apparatus main body 10, the guide surface 304a is perpendicular to the rotation axis R. Further, a guide roller 312 that can rotate around the rotation axis R is attached to the tip portion 20b of the rotation shaft 20. The guide roller 312 is easily removable. By abutting the guide surface 304a on the flat upper surface of the work material and abutting the guide roller 312 on the curved side surface of the work material, the chamfering device 1 is attached to the curved corner portion of the work material. It is designed to guide you along. The corners of the work material are cut and chamfered by the inclined blade portion 23b of the cutting tip 22.

Before attaching the guide members 100, 200, and 300 to the adjusting member 28, or before attaching the guide members 100, 200, and 300 to the adjusting member 28 and fixing them to the guide member attaching portion 24 of the device housing 12, the adjusting member 28 is rotated in the direction of the rotation axis R. By adjusting the position in, the mounting positions of the guide members 100, 200, and 300 in the direction of the rotation axis R with respect to the device main body 10 can be adjusted. As a result, the amount of the cutting blade 23 of the cutting tip 22 protruding from the guide surfaces 104a, 106a, 204a, 206a, 304a can be adjusted to adjust the chamfering amount of the work material. An annular memory member 32 is attached to the outside of the adjusting member 28, and the chamfering amount can be adjusted to an arbitrary value by adjusting the adjusting member 28 based on the memory engraved on the memory member 32. The memory member 32 is rotatable with respect to the adjusting member 28, and after adjusting the position of the memory member 32 so that the memory of the memory member 32 and the actual chamfered amount are the same, the memory is stored by the set screw 34. The member 32 can be fixed to the adjusting member 28.

Each of the guide members 100, 200, and 300 includes clamp mechanisms 102, 202, and 302 fixed to the guide member mounting portion 24 of the apparatus main body 10, but these clamp mechanisms 102, 202, and 302 have the same shape. There is.

As the cutting tip, a cutting tip 122 as shown in FIG. 16 can be used instead of the pentagonal cutting tip 22 described above. The cutting tip 122 is attached to the tip portion 120b of the rotating shaft 120. The cutting blade 123 of the cutting tip 122 is located between the inclined blade portion 123b inclined by 45 degrees with respect to the rotating axis R of the rotating shaft 120 and the right-angled blade portion 123c and the inclined blade portion 123b perpendicular to the rotating axis R. It has a square blade portion 123a to be formed. The square blade portion 123a is sharpened diagonally downward to the right as seen in the drawing, but is sharpened at least in the direction of the rotation axis R in a direction away from the base portion 120a of the rotation axis 120. Further, in the cutting tip 222 shown in FIG. 17, the square blade portion 223a between the inclined blade portion 223b and the right-angled blade portion 223c of the cutting blade 223 has a slightly rounded arc shape. The shape of the cutting tip can be changed arbitrarily, and in addition to the shapes of the cutting tips 22, 122 and 222, other polygonal shapes such as a quadrangle and a triangle may be used, and the inclined blade portion has a portion curved inward. R chamfering may be performed when the shoulder is shaved.

In the chamfering device 1, a plurality of types of guides including a guide member 100 for straight shoulder cutting, a guide member 200 for front cutting, and a guide member 300 for curved shoulder cutting, which can be selectively attached to one device main body 10. It is equipped with a member. Therefore, it is possible to perform chamfering in different forms with one chamfering device 1 by exchanging with an arbitrary guide member according to the required chamfering form. Further, since chamfering is performed at different portions of the cutting blade depending on whether the shoulder cutting guide member is attached or the front cutting guide member is attached, the life of the cutting blade can be extended.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. For example, in the above embodiment, the plurality of types of guide members include three types of guide members: a guide member for straight shoulder cutting, a guide member for front cutting, and a guide member for curved shoulder cutting. One of the guide member for shoulder cutting and the guide member for curved shoulder cutting may be included, or a guide member of another form may be further included. An air motor can also be used as the drive unit. Although the above embodiment is a hand-held chamfering device, it may be a stationary chamfering device in which a work material is moved with respect to the chamfering device to perform chamfering. Further, instead of providing the cutting blade by attaching the cutting tip to the rotating shaft, the cutting blade may be formed directly at the tip of the rotating shaft. The purpose of the chamfering process may be chamfering as a finishing process of the member or chamfering for groove processing on the base metal to be welded.

1 Device 10 Device body 12 Device housing 14 Electric motor (drive unit)
16 Drive shaft 18 Gear mechanism 20 Rotating shaft 20a Base 20b Tip 22 Cutting tip 23 Cutting blade 23a Square blade 23b Inclined blade 24 Guide member mounting 24a Engagement outer peripheral surface 26 Male thread 28 Adjusting member 30 Circular groove 32 Memory Member 34 Set screw 100 Guide member for straight shoulder cutting 101 Plunger 102 Clamp mechanism 104 First guide plate 104a First guide surface 106 Second guide plate 106a Second guide surface 108 Clamp portion 108a Engagement inner peripheral surface 109 Screw (tightening member) )
110 Clamp Lever 120 Rotating Shaft 120b Tip 122 Cutting Tip 123 Cutting Blade 123a Square Blade 123b Inclined Blade 123c Right Angle Blade 200 Front Cutting Guide Member 201 Plunger 202 Clamp Mechanism 204 1st Guide Plate 204a 1st Guide Surface 206 2 Guide plate 206a 2nd guide surface 208 Clamp portion 208a Engagement inner peripheral surface 209 Screw (tightening member)
210 Clamp lever 222 Cutting tip 223 Cutting blade 223a Square blade 223b Inclined blade 223c Right-angle blade 300 Curved shoulder cutting guide member 301 Plunger 302 Clamp mechanism 304 Guide plate 304a Guide surface 308 Clamp part 308a Engagement inner peripheral surface 309 Screw (Tightening member)
310 Clamp lever 312 Guide roller R Rotation axis

Claims (7)

It is the main body of the chamfering device that chamfers the corners of the work material.
Equipment housing and
A drive unit arranged in the device housing and
Rotation that has a base that is rotatably held in the device housing within the device housing and a tip that is located outside the device housing, is drive-coupled to the drive unit, and is rotationally driven around a rotation axis. Axis and
A square blade portion provided at the tip portion of the rotating shaft and located at a position deviated from the rotating axis, and inclined outward in the radial direction in a direction approaching the base portion in the direction of the rotating axis from the square blade portion. A cutting blade with an inclined blade and
A guide member mounting portion provided in the device housing so that the shoulder-cutting guide member and the front-cutting guide member can be interchangeably mounted.
With
When the shoulder cutting guide member is attached to the guide member mounting portion, the cutting blade is rotationally driven when the device main body is guided along the corner portion of the work material by the shoulder cutting guide member. The inclined blade portion cuts a corner portion of the work material to chamfer the corner portion.
When the front cutting guide member is attached to the guide member mounting portion, the cutting blade is rotationally driven when the device main body is guided along the corner portion of the work material by the front cutting guide member. The main body of the apparatus, in which the corner portion of the work material is cut by the square blade portion to chamfer the corner portion. Further provided with a guide roller detachably attached to the tip of the rotating shaft so that it can rotate around the rotating axis.
The shoulder cutting guide member is a curved shoulder cutting guide member for chamfering a curved corner portion of the work material.
When the curved shoulder cutting guide member is attached to the guide member mounting portion, the curved shoulder cutting guide member is brought into contact with one of the planes defining the corner portion, and the guide roller attached to the rotating shaft is brought into contact with the guide member. The apparatus main body according to claim 1, wherein the apparatus main body is guided along the curved corner portion by abutting against the other curved surface defining the corner portion. The apparatus main body according to claim 1 or 2, further comprising a cutting tip that is detachably attached to the tip of the rotating shaft to form the cutting blade. A chamfering device designed to chamfer the corners of the work material.
The apparatus main body according to any one of claims 1 to 3 and
A plurality of types of guide members selectively attached to the guide member attachment portion of the apparatus main body, and
With
The plurality of types of guide members
The main body of the device is guided along the linearly extending corners of the work material, and the corners are cut by the square blades of the rotationally driven cutting blade to chamfer the corners. The main body of the device is guided along the linearly extending corners of the front cutting guide member and the work material, and the corners are cut by the inclined cutting blade of the rotationally driven cutting blade. A guide member for straight shoulder cutting that chamfers the corners, and the inclined blade portion of the cutting blade that is rotationally driven by guiding the main body of the device along the curved corners of the work material. At least one guide member for shoulder cutting, which is a curved shoulder cutting guide member for cutting the corner portion and chamfering the corner portion.
Chamfering device, including. The guide member mounting portion has an engaging outer peripheral surface located around the rotating shaft.
Each of the plurality of types of guide members has an annular clamp portion having an engagement inner peripheral surface having a diameter larger than that of the engagement outer peripheral surface, and for tightening and fixing the clamp portion to the engagement outer peripheral surface. The chamfering device according to claim 4, further comprising a clamp mechanism including a tightening member. The chamfering device according to claim 5, wherein the clamp mechanisms of the plurality of types of guide members have the same shape as each other. Further, an annular adjusting member whose main body is screwed into the device housing at a position around the rotation axis and is displaced in the direction of the rotation axis by rotating with respect to the device housing. Prepare,
By displacing the adjusting member in the direction of the rotating axis, the position of the guide member attached to the guide member mounting portion in the direction of the rotating axis is adjusted to adjust the chamfering amount by the cutting blade. The chamfering device according to any one of claims 4 to 6.

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