JP2013071238A - Workpiece cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a workpiece into a spherical shape, a circular cone shape, and a truncated cone shape without rotating the workpiece pressed against a cutting part only by inserting the workpiece, thereby improving cutting efficiency.SOLUTION: A cutting recess for inserting a workpiece is formed in a base. A cutting element such as a cutting edge or cutting abrasive grain is provided on an inner circumferential surface of the cutting recess. When the base is rotated while pressing the workpiece inserted into the cutting recess against the cutting part, the workpiece can be cut along an inner circumferential surface shape of the cutting recess. An inlet-side cutting part for cutting the workpiece and a back-side cutting part with a smaller inner diameter than the inlet side cutting part are continuously provided in two or more stages on the inner circumferential surface of the cutting recess. Both cutting parts are continuously provided so as to insert the workpiece from the inlet side cutting part to the back-side cutting part. The inlet-side cutting part and the back-side cutting part are provided in a stepwise manner such that a workpiece cannot be continuously inserted from the inlet-side cutting part to the back-side cutting part. A discharge port for discharging chips or an accumulation space for temporarily accumulating the chips is provided in the cutting recess.

Description

  The present invention relates to a workpiece cutting tool that can cut or chamfer workpieces of various shapes such as rods, pipes, blocks, and the like made of a hard material such as metal, non-ferrous metal, hard resin, and stone.

  Conventionally, there have been tools for polishing a workpiece into a spherical surface and an arc surface (Patent Documents 1 and 2), but the tip of the workpiece such as a non-ferrous metal, a hard resin, a hard material such as stone, or a pipe is spherical, conical, There was no cutting tool that could cut into a convex arc. Therefore, conventionally, in order to cut a workpiece made of hard material, a disk-shaped cutting tool (cutting blade, cutting abrasive grain, etc.) is rotated, and the workpiece is pressed against the cutting tool to cut the workpiece. Cutting while changing the position where the cutting tool was pressed against the workpiece while checking. Therefore, it takes time to cut, and skill is required to be able to cut into a fixed shape.

  There are two types of polishing tools in the above-mentioned Patent Document 1, and one of them polishes the convex spherical part of a workpiece that has been processed into a convex spherical shape in advance by bringing it into contact with the curved curved polishing surface of the polishing tool. The other is to polish the concave spherical surface of the workpiece that has been processed into a concave spherical shape in advance by bringing it into contact with the spherical polishing surface protruding from the processing tool. However, since the former has a larger curved diameter than the convex spherical surface of the workpiece, and the latter has a larger protruding diameter than the concave spherical surface of the workpiece, the latter has both a convex spherical surface and a concave spherical surface. In order to polish the whole, it was necessary to move the workpiece while observing the cutting state of the workpiece to bring it into contact with the curved polishing surface or the spherical polishing surface.

  The polishing tool disclosed in Patent Document 2 polishes a curved polishing surface (surface member) in which a polishing tool is recessed by contacting the convex spherical surface of a workpiece that has been processed into a convex spherical surface in advance. However, since the curved polishing surface of the polishing tool is smaller than the convex spherical surface of the workpiece, the polishing tool must be moved along the convex spherical surface of the workpiece. Moreover, since the surface member of the tool is made of resin in order to finish the surface of the workpiece smoothly, it cannot be used for cutting.

  In either case of Patent Documents 1 and 2, the polished surface of the work must be processed into a spherical shape or a curved concave shape in advance. Moreover, although it was able to grind | polish, it was not able to cut.

JP-A-8-206953 JP-A-9-239666

  The problem to be solved by the present invention is that if the workpiece is inserted into the cutting tool and the work surface of the workpiece is pressed against the cutting portion of the cutting tool, the workpiece can be cut into a predetermined shape without moving the workpiece while observing the cutting state. It is to provide a work cutting tool with good cutting efficiency.

  The workpiece cutting tool of the present invention is a workpiece cutting tool capable of cutting by inserting workpieces of various shapes such as a rod shape, a column shape, a cylindrical shape, and a block shape, and cutting capable of inserting the workpiece into a base body that can be mounted on a rotating device. When a recess is formed, a cutting portion is provided on the inner peripheral surface of the cutting recess, and the work piece inserted into the cutting recess is pressed against the cutting portion, the workpiece insertion portion ( The workpiece) can be cut along the shape of the inner peripheral surface of the cutting recess.

  The inner peripheral surface of the cutting recess can be formed into an arc shape, a conical shape or a truncated cone shape. The inner peripheral surface of the cutting recess is provided with two or more steps of an inlet side cutting part capable of cutting a workpiece and an inner side cutting part having a smaller inner diameter than the inlet side cutting part, and a cutting blade is provided at each stage cutting part, A cutting part such as a cutting grindstone can be provided. The entrance-side cutting part and the back-side cutting part can be provided continuously from the entrance-side cutting part to the back-side cutting part so as to be able to continuously press the work, or can be provided in a stepped shape that cannot be continuously pressed. It is also possible to provide the entrance side cutting part and the back side cutting part in a stepped shape where two or more steps cannot be pushed in continuously, and to provide a tapered chamfered cutting part at the boundary part between the two cutting parts. Two or more of the cutting blades can be provided on the inner peripheral surface of the cutting recess, and the cutting abrasive grains can be diamond particles or superhard metal particles, which are fixed to the inner peripheral surface of the cutting recess. In any of the above cases, a discharge space capable of discharging chips generated by cutting in the cutting recesses or a storage space for storing the chips can be provided in the cutting recesses.

The workpiece cutting tool of the present invention has the following effects.
(1) Insert the workpiece into the cutting recess of the workpiece cutting tool, and rotate the workpiece cutting tool while pressing the tip of the workpiece in the insertion direction against the cutting blade or cutting abrasive in the cutting recess, thereby inserting the workpiece. The tip side can be cut along the inner shape of the cutting recess with a cutting blade or cutting abrasive, and it is not necessary to rotate the workpiece while checking the cutting state of the workpiece as in the past, easily and quickly. Even an unskilled person can cut according to the shape of the cutting recess.
(2) Two or more entrance side cutting parts and a back side cutting part having a diameter smaller than that are continuously provided on the inner peripheral surface of the cutting recess, and can be continuously pushed from the entrance side cutting part side to the back side cutting part side. If the work is pushed in sequentially from the inlet side cutting part side to the back side cutting part side, the inserted part of the work automatically becomes the inner peripheral surface shape of the inlet side cutting part and the back side cutting part. It is cut into a multi-stage convex shape similar to the inner surface shape.
(3) When the entrance side cutting part and the back side cutting part are provided in a staircase shape that cannot be pushed in more than two steps, the workpiece is made into a staircase shape that can be inserted into each cutting part in advance, and these shapes Can be cut into a multi-stage convex shape similar to the inner shape of the inlet side cutting portion and the back side cutting portion. In addition, even if the workpiece is not processed into a shape that can be inserted into each cutting portion in advance, the workpiece can be inserted into the cutting portion on the inlet side and cut into a convex shape similar to the inner shape of the cutting portion. Since the workpiece can be inserted into the back side cutting portion and cut into a convex shape similar to the inner shape of the cutting portion, a workpiece having two or more outer diameters can be cut with one workpiece cutting tool.
(4) When the inlet side cutting part and the back side cutting part are provided in a stepped shape that cannot be pushed in more than two steps continuously, and a tapered chamfered cutting part is provided at the boundary between both cutting parts, it is inserted into the inlet side cutting part. By pressing the peripheral edge portion of the workpiece against the chamfered cutting portion, the peripheral edge portion can be chamfered and cut into a tapered surface.
(5) Since a discharge port capable of discharging chips generated by cutting or a storage space in which chips can be stored is provided in the cutting recess, cutting is suspended in the middle of cutting and the workpiece is removed from the cutting recess. Even if it is not extracted and the chips in the cutting recesses are not discharged, the chips do not interfere with the cutting, continuous cutting is possible, and workability is improved.
(6) Since the cutting blade and cutting abrasive grains are provided in the cutting recess, the operator's hand and fingers do not hit the cutting blade or cutting abrasive grains to be injured.

(A) is a longitudinal sectional view showing an example of the workpiece cutting tool of the present invention, (b) is a storage space in which cutting blades are attached to the cutting recesses at intervals, and the interval portions can store chips. Explanatory drawing when doing. (A)-(c) is sectional drawing which shows the example of a different shape at the time of making the entrance side cutting part and back | inner side cutting part of the cutting recessed part in the workpiece cutting tool of this invention continue in an arc shape, (d)-(f). (A)-(c) is sectional drawing which shows an example of the workpiece | work inserted in the cutting recessed part of (c), (g) is a perspective view of the workpiece | work which cut the work of (d) by the cutting recessed part of (a), (h) FIG. 3 is a perspective view of a workpiece obtained by cutting the workpiece (e) at the cutting recess portion (b). (A)-(c) is sectional drawing which shows the example of a different shape at the time of making the entrance side cutting part and back | inner side cutting part of a cutting recessed part in the workpiece cutting tool of this invention into a slope, (d)-(f (A) is sectional drawing which shows an example of the workpiece | work inserted in the cutting recessed part of (a)-(c), (g) is a perspective view of the workpiece | work which cut the work of (e) in the cutting recessed part of (b). (A) is sectional drawing which shows the example of a different shape at the time of making the entrance side cutting part and back | inner side cutting part of the cutting recessed part in the workpiece cutting tool of this invention into the slope, and (b) is the workpiece cutting of (a). Sectional drawing which shows an example of the workpiece | work cut with a tool, (c) is sectional drawing of the workpiece | work after cutting the workpiece | work of (b) with the workpiece cutting tool of (a). (A) is sectional drawing which shows the example which provided the chamfering cutting part in the boundary part of the entrance side cutting part and back | inner side cutting part of the cutting recessed part in the workpiece cutting tool of this invention, (b) is the workpiece cutting tool of (a). Sectional drawing which shows an example of the workpiece | work cut | disconnected by (c), (c) is sectional drawing of the workpiece | work after carrying out chamfering cutting of the workpiece | work of (b) with the workpiece cutting tool of (a). (A) is a plan view when cutting abrasive grains are attached to the inner peripheral surface of the cutting recess, (b) is a plan view when a cutting blade is attached to the inner peripheral surface of the cutting recess for clockwise rotation, and (c). (B) is a cross-sectional view when the AA cross section of the cutting blade is rectangular, (d) is a cross-sectional view when the AA cross section of the cutting blade (b) is chevron, (e) is a cutting recess. The top view at the time of attaching a cutting blade for left rotation to an internal peripheral surface.

(Embodiment with one cut recess)
An example of an embodiment of a workpiece cutting tool of the present invention will be described with reference to the drawings. The workpiece cutting tool 1 in FIG. 1A is provided with a mounting shaft 3 at one end in the axial direction of a cylindrical base material 2 and a cutting recess 4 into which a workpiece W can be inserted at the other end in the axial direction of the base material 2. A cutting portion 6 capable of cutting the workpiece W is provided on the inner peripheral surface 5 of the cutting recess 4. Several cutting blades 7 are attached to the cutting part 6 at intervals. A recess (groove, recess, etc.) is formed in the back between the adjacent cutting blades 7, and the recess is opened to the inner peripheral surface 5 of the cutting recess 4 to form a storage space 8. The reservoir space 8 has a size that allows the chips of the workpiece cut in the cutting recess 4 to be collected.

  The shape of the cutting recess 4 in FIGS. 1A and 1B is substantially semicircular, but the shape and size of the cutting recess 4 are various shapes and sizes according to the shape and size of the workpiece W to be cut. be able to. The number, formation location, area, and the like of the storage space 8 can be designed so as to easily collect chips.

  The cutting blade 7 can be formed directly on the inner peripheral surface 5 of the cutting recess 4, but a blade manufactured separately from the inner peripheral surface 5 can also be attached to the inner peripheral surface 5 by welding or other attachment means. The cutting blade 7 may be linear, arcuately curved, or other shapes, but in any case, when several pieces are attached to the inner peripheral surface 5, the workpiece cutting tool 1 is rotated in the clockwise direction. If it is rotated (right-turned) and cut to make it easier to cut, it is attached to the lower right slope (Fig. 6 (b)), or conversely, the workpiece cutting tool 1 is rotated counterclockwise (left-turned). If it cuts, it can be attached to the downward sloping slope (FIG. 6E) so that it can be easily cut.

  The shape of the cutting blade 7 can be designed according to the material, hardness, cutting shape, etc. of the workpiece. As an example, the one shown in FIG. 6C is a rectangular cross-sectional shape, and the one shown in FIG. The shape is V-shaped (mountain shape). The cutting blade 7 in FIG. 6B has a cutting blade 7a formed at the tip in the right rotation direction, and the cutting blade 7 in FIG. 6C has a cutting blade 7a formed in the tip in the left rotation direction.

  In the present invention, not the cutting blade 7 but the cutting abrasive grains 9 are attached to the inner peripheral surface 5 of the cutting recess 4 as shown in FIGS. 2 (a) to 2 (c) and FIGS. 3 (a) to 3 (c). You can also. The cutting abrasive grains 9 are made of a material that can easily cut the workpiece W. For example, diamond particles, cemented carbide particles, and the like are suitable. The particle size (size) of the cutting abrasive grains 9 is preferably selected so that the cutting efficiency is good and the finished surface of the workpiece W is smooth. The cutting particles 9 are preferably attached uniformly and densely on the entire inner peripheral surface 5 of the cutting recess 4 by vapor deposition, adhesive, or other fixing means as shown in FIG.

  At the back of the cutting recess 4 is a discharge port 10 (FIGS. 2 (a) to (c), FIGS. 3 (a) to (c)) for discharging the chips of the workpiece W to be cut inside. Can be provided. As an example, the discharge port 10 shown in FIGS. 2A to 2C is opened through the depth of the cutting recess 4. The number of the discharge ports 10 can be two or more, and the opening location and size can be designed so that the chips are easily discharged.

(Usage example of workpiece cutting tool in FIG. 1 (a))
In order to cut the workpiece W using the workpiece cutting tool 1 shown in FIG. 1A, the mounting shaft 3 of the workpiece cutting tool 1 is attached to a rotating device. If the tip side of the round bar-shaped workpiece W is inserted into the cutting recess 4 of the workpiece cutting tool 1, the tip is pressed against the cutting portion 6, the mounting shaft 3 is rotated by a rotating device, and the base body 2 is rotated. The tip side of the workpiece W is cut into a convex hemisphere along the inner surface of the cutting recess 4. In this case, if the rotating device can be swung in any direction of 360 degrees with the axis of the mounting shaft 3 as the central axis, cutting becomes easier.

(Work cutting tool in FIG. 2A and its use example)
As shown in FIGS. 2A to 2C, the inner circumferential surface 5 of the cutting recess 4 can be formed in two or more stages, and the cutting blade 7 and the cutting abrasive grains 9 can be provided on the inner circumferential surface 5 of each stage. . The number of steps and the shape of each step can be designed according to the cutting shape of the workpiece. Even in the case of multiple stages, the same points as in the single stage shown in FIG. 1A can be made the same.

  As an example of the multistage shape, FIG. 2A shows a case of two stages, in which a large-diameter cylindrical inlet-side cutting portion 12 is provided on the inlet side of the cutting recess 4, and a semicircular arc-shaped rear side is provided behind it. The cutting part 13 is provided continuously. When this workpiece cutting tool 1 is used, the tip side of a round bar-shaped workpiece W formed in advance in two stages as shown in FIG. By pressing the surface against the back side cutting portion 13 and cutting, the tip side of the workpiece W is cut into a convex spherical shape along the inner surface shape of the cutting recess 4 as shown in FIG.

(Work cutting tool in FIG. 2B and its use example)
As an example of the multi-stage shape, the one shown in FIG. 2B is also a two-stage case, in which the inner peripheral surface of the cylindrical inlet-side cutting part 12 is inflated to the outside and curved, and a semicircular arc-shaped back side behind it. The cutting part 13 is provided continuously, and the cutting part 6 is provided on the inner peripheral surface 5 of the inlet side cutting part 12 and the back side cutting part 13. When this workpiece cutting tool 1 is used, the distal end side of a round bar-shaped workpiece W formed in advance in two stages as shown in FIG. The large diameter portion of the workpiece W shown in FIG. 2 (e) is cut by the cutting portion 6 of the inlet side cutting portion 12 by pressing the surface against the back side cutting portion 13 and rotating the workpiece cutting tool 1. The small diameter portion is cut by the back side cutting portion 13 and cut into a convex shape along the inner surface shape of the cutting concave portion 4 as shown in FIG.

(Work cutting tool of FIG. 2 (c) and its use example)
As an example of the multi-stage shape, FIG. 2C shows a case where the cutting recess 4 has three stages, the inner peripheral surface of the inlet-side cutting part 12 is formed in a tapered semicircular arc shape, and the inlet-side cutting is formed in the back thereof. A semicircular arc-shaped intermediate cutting portion 14 having a smaller diameter than that of the portion 12 is continuously provided, and a deeper semicircular arc-shaped cutting portion 13 having a smaller diameter is further provided behind the intermediate cutting portion 13. When this workpiece cutting tool 1 is used, the tip side of a round bar-shaped workpiece W formed in three stages in advance as shown in FIG. By cutting the distal end surface against the back-side cutting portion 13 and rotating the cutting tool 1, the entrance-side cutting portion 12, the intermediate cutting portion 14, and the back-side cutting portion 13 are cut into a convex shape along the inner shape of the cutting recess 4. Is done.

  The workpiece cutting tool 1 shown in FIG. 2 (c) allows the workpiece to be continuously pushed in by allowing the boundary portions of the inlet-side cutting portion 12, the intermediate cutting portion 14, and the back-side cutting portion 13 to continue gently, and the inlet-side cutting portion 12 can be continuously pushed. Since the cutting parts 6 are provided on all the inner peripheral surfaces 5 of the intermediate cutting part 14 and the back side cutting part 13, a cylindrical workpiece that is not processed in advance as shown in FIG. Then, the workpiece is pushed into the intermediate cutting portion 14 as it is to be cut, and further, the workpiece is pushed into the back-side cutting portion 13 so that the convex shape along the inner shape of the cutting recess 4 is continuous. Can be cut.

(Work cutting tool in FIG. 3A and its use example)
The workpiece cutting tool shown in FIG. 3 (a) is also a case where the cutting recess 4 has three steps, the entrance-side cutting portion 12 is formed into a cylindrical recess, and a tapered intermediate cutting portion 14 is provided at the tip thereof. The tip of the flat portion 16 is stepped, the far side cutting portion 13 of the flat portion 16 is conical concave, and the inner periphery of the inlet side cutting portion 12, the intermediate cutting portion 14, and the back side cutting portion 13 is formed. A cutting portion 6 is provided on the surface. If a workpiece formed in advance in two steps is inserted into the cutting recess 4 and cut as shown in FIG. 3D, the tip side of the workpiece W can be cut into a conical shape by the back side cutting portion 13, The cutting portion 14 can form an intermediate portion of the workpiece W on a slope, and the entrance-side cutting portion 12 can cut the base side of the workpiece W into a cylindrical shape.

(Work cutting tool in FIG. 3B and its use example)
The workpiece cutting tool 1 shown in FIG. 3 (b) has the cutting recesses 4 in five stages, the entrance side cutting part 12 is cylindrical, and the inner peripheral surface of the first intermediate cutting part 14 in front of it. , And the inner peripheral surface of the second intermediate cutting portion 17 ahead and the third intermediate cutting portion 18 ahead is a tapered arc surface, and the inner side cutting portion 13 is a conical recess, The cutting part 6 is provided on the inner peripheral surfaces of the inlet side cutting part 12, the intermediate cutting parts 14, 17, 18 and the back side cutting part 13. If the workpiece W, which has been formed in four stages in advance as shown in FIG. 3 (e), is inserted into the cutting recess 4 and cut, the root side of the workpiece W can be cut into a cylindrical shape by the inlet side cutting portion 12. The intermediate cutting portions 14, 17 and 18 can cut the intermediate portion of the workpiece W into a three-step slope, and the back-side cutting portion 13 can cut the tip of the workpiece W into a conical convex shape.

  The workpiece cutting tool 1 shown in FIG. 3B is configured such that the boundary portion between the inlet side cutting portion 12, the three intermediate cutting portions 14, 17, 18 and the back side cutting portion 13 is gently and continuously pushed into the workpiece. Yes, since the cutting parts 6 are provided on all the inner peripheral surfaces 5 of the inlet side cutting part 12, the intermediate cutting parts 14, 17, 18, and the back side cutting part 13, without processing the workpiece W in multiple stages in advance. The workpiece is inserted into the entrance-side cutting portion 12 and cut in the cylindrical shape, and the workpiece is successively pushed into the intermediate cutting portions 14, 17, 18 and the back-side cutting portion 13 as the cutting progresses. Can be cut into a continuous convex shape along the inner shape of the cutting recess 4.

(Work cutting tool in FIG. 3C and its use example)
The workpiece cutting tool 1 shown in FIG. 3 (c) has three cutting recesses 4. The entrance-side cutting part 12 is formed in a cylindrical shape, a flat part 16a is provided at the tip, and a cylindrical intermediate part is provided at the tip. The cutting part 14 is provided, the flat part 16b is provided at the tip, the conical concave back side cutting part 13 is provided at the tip, the inlet side cutting part 12, the intermediate cutting part 14, and the back side cutting part 13 A cutting portion 6 is provided on the inner peripheral surface. If the workpiece W, which has been formed in three stages in advance as shown in FIG. 3 (f), is inserted into the cutting recess 4 and cut, the tip side of the workpiece W becomes a conical convex shape at the back side cutting portion 13. The intermediate portion of the workpiece W is cut into a cylindrical shape by the intermediate cutting portion 14, and the root side of the workpiece W is cut into a cylindrical shape at the entrance-side cutting portion 12.

(Work cutting tool in FIG. 4A and its use example)
The workpiece cutting tool 1 shown in FIG. 4 (a) has the cutting recess 4 in two stages, the entrance-side cutting part 12 is formed into a cylindrical concave shape, and the inner peripheral surface of the intermediate cutting part 14 ahead is slightly changed. An arcuate slope that swells inward, the back side cutting portion 13 at the back is conical concave, the back side cutting portion 13 at the tip is conical, the inlet side cutting portion 12, the intermediate cutting portion 14, the back side The cutting part 6 is provided on the inner peripheral surface of the cutting part 13. If the columnar workpiece W shown in FIG. 4B is pushed into the cutting recess 4 for cutting, the back side cutting portion 13 cuts the tip side of the workpiece W into a conical convex shape, and the inlet side cutting portion. 12, the base side of the workpiece W can be cut into a convex slope along the shape of the inlet-side cutting part 12. Also in this case, the columnar workpiece W shown in FIG. 4B can be pressed and continuously cut as the cutting progresses to obtain the cross-sectional shape shown in FIG.

(Work cutting tool in FIG. 5A and its use example)
The workpiece cutting tool 1 shown in FIG. 5 (a) has the cutting recess 4 in two steps, the entrance-side cutting portion 12 is formed into a cylindrical concave shape, and a flat portion 16 is provided at the tip thereof to form a step, A concave inner side cutting portion 13 having a semicircular arc shape is provided at the back of the flat surface portion 16, and a chamfering cutting portion 19 is provided at a boundary portion between the inlet side cutting portion 12 and the flat surface portion 16. When the cylindrical workpiece W shown in FIG. 5 (b) is inserted into the cutting recess 4 and the tip surface thereof is pressed against the flat portion 16, the chamfered cutting portion 19 causes the workpiece W as shown in FIG. 5 (c). The outer peripheral edge of the tip is chamfered to form the inclined surface 20. The chamfered cutting portion 19 can also be provided at another location in the cutting recess 4.

  In the present invention, the number of steps, structure, shape, size, radius of arc, inclination angle of the slope, shape of the cutting blade, number of cutting blades, mounting position, cutting abrasive material, particle size, mounting density, etc. are necessary. It can be designed accordingly, but the parts common to both can be the same.

  The shape, size, material, and the like of the workpiece to be cut with the workpiece cutting tool of the present invention can be arbitrarily selected. The shape may be any of a rod, a pipe, a block, a plate and the like, for example.

  In the above-described embodiment, the case where the columnar workpiece W is cut is described as an example. However, the workpiece W may be a pipe-shaped (cylindrical) shape. May be. The present invention can also be used as a polishing tool for polishing a cut surface of a workpiece cut into a predetermined shape. In that case, the cutting blade or cutting abrasive provided on the inner peripheral surface of the cutting recess 4 is used instead of a polishing buff or other abrasive.

DESCRIPTION OF SYMBOLS 1 Work cutting tool 2 Base material 3 Mounting shaft 4 Cutting recessed part 5 Inner peripheral surface 6 Cutting part 7 Cutting blade 7a Cutting blade 8 Reserving space 9 Cutting abrasive grain 10 Outlet 12 Inlet side cutting part 13 Back side cutting part 14 1st Intermediate cutting part 16 Flat part 16a First flat part 16b Second flat part 17 Second intermediate cutting part 18 Third intermediate cutting part 19 Chamfered cutting part 20 Slope W Workpiece

Claims (9)

  A workpiece cutting tool that can cut a workpiece. A cutting recess that can be inserted into the workpiece is formed on a base that can be mounted on a rotating device. A cutting portion is provided on the inner peripheral surface of the cutting recess, and the difference is within the cutting recess. A workpiece cutting tool characterized in that when the substrate is rotated in a state where the inserted workpiece is pressed against the cutting portion, the insertion portion of the workpiece can be cut along the shape of the inner peripheral surface of the cutting recess. .   2. The workpiece cutting tool according to claim 1, wherein the inner peripheral surface of the cutting recess is an arc, a cone, or a truncated cone.   2. The workpiece cutting tool according to claim 1, wherein an inlet-side cutting portion capable of cutting a workpiece inserted into the cutting recess and a back-side cutting portion having an inner diameter smaller than the inlet-side cutting portion are provided on the inner peripheral surface of the cutting recess. A workpiece cutting tool characterized in that a cut object is provided in a row at a stage or more, and a cutting object is provided at a cutting portion of each stage.   4. The workpiece cutting tool according to claim 3, wherein the entrance-side cutting portion and the back-side cutting portion are continuously provided so that the workpiece can be continuously pushed from the entrance-side cutting portion to the back-side cutting portion.   4. The workpiece cutting tool according to claim 3, wherein the entrance-side cutting portion and the back-side cutting portion are provided in a staircase shape in which the workpiece cannot be continuously pushed from the entrance-side cutting portion to the back-side cutting portion. .   6. The workpiece cutting tool according to claim 1, wherein a chamfered cutting portion is provided in the cutting recess.   The workpiece cutting tool according to any one of claims 1 to 6, wherein the workpiece is a cutting blade, and two or more cutting blades are provided on the inner peripheral surface of the cutting recess. Cutting tool.   The workpiece cutting tool according to any one of claims 1 to 6, wherein the workpiece is cutting abrasive grains, and the cutting abrasive grains are fixed to the inner peripheral surface of the cutting recess. Ingredients.   The workpiece cutting tool according to any one of claims 1 to 8, wherein a discharge port or chips capable of discharging chips generated by cutting in the cutting recesses are temporarily stored in the cutting recesses. A workpiece cutting tool characterized by having a storage space for storing the workpiece.

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