JP2016107361A - Deburring tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deburring tool that is simply structured and enhanced in durability.SOLUTION: A deburring tool 1 is constituted of: a hollow cylindrical rotary shaft 2 having a shaft hole 2A; a guide groove 3 that is provided at a tip side 2C of the rotary shaft 2 and extends in a direction orthogonal to a rotation center O-O of the rotary shaft 2 while being communicated with the shaft hole 2A of the rotary shaft 2; a cutting tool 6 that is provided movably in the guide groove 3 and has a cutting blade 9 provided at a site protruding from the guide groove 3; a V-shaped grove 8 provided in the cutting tool 6 at a site opposing to the shaft hole 2A of the rotary shaft 2; a pressing member 11 that is provided movably in the shaft hole 2A of the rotary shaft 2 and has a sphere body 11b which contacts the V-shaped groove 8; and a spring member 12 which is provided in the shaft hole 2A of the rotary shaft 2 while regularly energizing the sphere body 11b of the pressing member 11 toward the V-shaped groove 8.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a deburring tool that is suitably used to remove flash generated at the peripheral edge of a machining hole formed in a workpiece.

  In general, when a machined hole is formed in a workpiece such as a steel plate using a tool such as a drill, a burr occurs on the inner peripheral edge of the machined hole. For this reason, after forming the machining hole in the workpiece, it is necessary to remove the flash generated at the inner peripheral edge of the machining hole or chamfer the inner peripheral edge of the machining hole.

  Here, as a tool for chamfering the inner peripheral edge of the processing hole, a tool main body attached to the rotation source, a gap formed by dividing the tool main body in the axial direction, and a pair of provided in the gap A pair of cutters, which are arranged so as to be able to swing around each pin in the gap between the pin and the tool body, and swing between a position protruding outside from the outer peripheral surface of the tool body and a position accommodated in the tool body There has been proposed a chamfering tool including a blade and a coil spring that urges each cutter blade in a direction protruding from the outer peripheral surface of the tool body (see Reference 1).

Registered Utility Model No. 3078213

  However, the conventional chamfering tool includes a pair of pins, a pair of cutter blades, and the like, so that the number of parts increases. Thus, if the number of parts constituting the chamfering tool increases, the risk of damage to each part increases, and the durability of the chamfering tool may be reduced. Further, there is a problem that the configuration becomes complicated due to the increase in the number of parts, and the manufacturing cost of the chamfering tool increases.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a deburring tool capable of simplifying the configuration and enhancing the durability.

  In order to solve the above-described problem, the deburring tool according to the present invention has an axial hole extending along the rotation center, the proximal end side in the axial direction is attached to the rotation source, and the distal end side in the axial direction is formed on the workpiece. A hollow cylindrical rotating shaft to be inserted into the machining hole, and provided on the tip side of the rotating shaft, and extends in a direction orthogonal to the rotation center of the rotating shaft in a state of communicating with the shaft hole of the rotating shaft. A cutting tool provided with a guide groove and a cutting blade provided in the guide groove so as to be movable in a direction perpendicular to the center of rotation of the rotary shaft and cutting the flash at a portion protruding from the guide groove; A V-shaped groove having a V-shaped inclined surface that is provided in the cutting tool at a portion facing the shaft hole of the rotation shaft and is inclined obliquely along the length direction of the guide groove, and the rotation shaft It is provided in the shaft hole so as to be movable in the axial direction. A pressing member having a contact portion that contacts the V-shaped groove on the other side of the direction, and the shaft hole of the rotating shaft in a state in which the contact portion of the pressing member is constantly biased toward the V-shaped groove. A spring member provided inside, and the cutting tool is inserted into the guide groove when the tip side of the rotating shaft is inserted into the machining hole and the cutting blade of the cutting tool is pressed against the machining hole. The contact portion of the pressing member moves along the inclined surface of the V-shaped groove against the biasing force of the spring member and removes the flash generated in the processing hole. Yes.

  According to the present invention, the contact portion of the pressing member biased by the spring member presses the inclined surface of the V-shaped groove provided in the cutting tool when the tip end side of the rotating shaft is separated from the machining hole of the workpiece. By doing so, the cutting blade of the cutting tool maintains the state of protruding from the guide groove. Therefore, when the tip end of the rotating shaft is inserted into the machining hole of the workpiece, the cutting blade of the cutting tool can be pressed with an appropriate force against the inner peripheral edge of the machining hole formed in the workpiece. The flash generated on the inner periphery can be removed.

  In this case, the deburring tool has a rotary shaft having a guide groove on the tip side, a cutting tool movably provided in the guide groove, and a pressing portion having a contact portion that comes into contact with the V-shaped groove of the cutting tool. It is comprised by the member and the spring member which always urges | biases the contact part of a press member toward a V-shaped groove. For this reason, the structure of a deburring tool can be simplified by reducing the number of parts constituting the deburring tool. As a result, the risk of damaging each component of the deburring tool can be reduced, and the durability of the deburring tool can be increased.

It is a perspective view which shows the state which removes the flash | burr of the processing hole formed in the workpiece | work using the deburring tool by embodiment of this invention. It is a disassembled perspective view which shows each component of a deburring tool. It is sectional drawing which looked at the deburring tool from the arrow III-III direction in FIG. It is sectional drawing which shows the state which the cutting blade of the deburring tool was spaced apart from the process hole of the workpiece | work. FIG. 5 is a cross-sectional view similar to FIG. 4 showing a state in which the cutting blade of the deburring tool is in contact with the upper inner periphery of the machining hole of the workpiece. FIG. 5 is a cross-sectional view similar to FIG. 4 showing a state in which the cutting blade of the deburring tool is in contact with the inner peripheral surface of the work hole of the workpiece. It is sectional drawing similar to FIG. 4 which shows the state which the cutting tool of the deburring tool spaced apart from the process hole of the workpiece | work. FIG. 5 is a cross-sectional view similar to FIG. 4 showing a state in which the cutting blade of the deburring tool is in contact with the lower inner periphery of the work hole of the workpiece. It is sectional drawing of a partially broken part which shows the deburring tool provided with the press member by a modification.

  Hereinafter, embodiments of a deburring tool according to the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIG. 1, when drilling a workpiece 101 such as a steel plate using a drill or the like, the upper inner peripheral edge 102 </ b> A that is one side (upper side) in the axial direction of the machining hole 102 and the axis of the machining hole 102. A flash 103 is generated on each of the lower inner peripheral edges 102B that are the other side (lower side) of the direction.

  The deburring tool 1 according to the present embodiment removes the flash 103 generated on the upper inner peripheral edge 102A and the lower inner peripheral edge 102B of the machining hole 102. For example, the deburring tool 1 is applied to a machine tool (not shown) such as a machining center or a drilling machine. It is attached to a spindle 104 as a provided rotation source. Here, as shown in FIGS. 2 and 3, the deburring tool 1 includes a rotary shaft 2, a cutting tool 6, a pressing member 11, a spring member 12, and the like, which will be described later.

  The rotating shaft 2 is a base of the deburring tool 1 and is rotated about a rotation center OO by being attached to the spindle 104 of the machine tool. The rotating shaft 2 is formed of a hollow stepped cylindrical body as a whole, and an axial hole 2A extending along the rotation center OO is formed in the central portion thereof so as to penetrate in the axial direction. The base end side (upper end side) 2B in the axial direction of the rotary shaft 2 is attached to a spindle 104 as a rotation source, and the front end side (lower end side) 2C in the axial direction of the rotary shaft 2 is processed on the workpiece 101. It is inserted into the hole 102.

  In this case, a flat surface 2D is formed on the base end side 2B of the rotating shaft 2 by cutting the outer peripheral surface into a flat shape. For example, when the base end side 2B of the rotating shaft 2 is attached to the spindle 104, A bolt (not shown) for fixing the rotary shaft 2 to the spindle 104 is configured to abut on the flat surface 2D.

  The distal end side 2C of the rotary shaft 2 is provided with a large diameter portion 2E having a diameter larger than that of the proximal end side 2B. A fitting projection 2F having a circular shape smaller in diameter than the large-diameter portion 2E is provided on the end surface (lower end surface) of the large-diameter portion 2E, and an outer peripheral side of the fitting projection 2F is described later. The inner peripheral surface of the arcuate protrusion 4B of the lid body 4 to be fitted is fitted.

  The large-diameter portion 2E and the fitting protrusion 2F provided on the distal end side 2C of the rotary shaft 2 are formed with a guide groove 3 which will be described later, and the end face (lower end surface) on the distal end side of the fitting protrusion 2F. Two female screw holes (bolt holes) 2G are screwed to sandwich the guide groove 3.

  On the other hand, a pressing member 11, a spring member 12, a set screw 13 and the like, which will be described later, are inserted into the shaft hole 2A formed in the central portion of the rotating shaft 2, and the portion corresponding to the set screw 13 in the shaft hole 2A A female screw portion 2H into which the set screw 13 is screwed is formed.

  The guide groove 3 is provided in the large-diameter portion 2E and the fitting protrusion 2F located on the distal end side 2C of the rotating shaft 2, and a cutting tool 6 described later slides in a direction orthogonal to the rotation center OO. It is movably inserted. The guide groove 3 extends in a direction orthogonal to the rotation center OO of the rotary shaft 2 and has a length dimension that penetrates the large diameter portion 2E and the fitting protrusion 2F in the radial direction. Therefore, the direction perpendicular to the rotation center OO of the rotation shaft 2 is the length direction of the guide groove 3.

  Here, the guide groove 3 is formed as a groove having a quadrangular cross section, and has a pair of side surfaces 3A facing each other with the rotation center O therebetween, and an upper surface 3B connecting the upper ends of the side surfaces 3A. A shaft hole 2 </ b> A of the rotating shaft 2 communicates with an intermediate portion in the length direction of the upper surface 3 </ b> B of the guide groove 3.

  The lid 4 is detachably attached to the distal end side 2 </ b> C of the rotary shaft 2 and forms a groove bottom of the guide groove 3. The lid body 4 is formed by a plate body formed in a substantially D shape, and has a flat bottom surface 4A located at the center and a pair of arc-shaped protrusions 4B rising from the peripheral edge of the bottom surface 4A. In 4A, two bolt insertion holes 4C are formed at positions corresponding to the female screw holes 2G of the rotary shaft 2.

  The lid 4 has the inner peripheral surface of each arcuate protrusion 4B fitted to the outer peripheral surface of the fitting projection 2F of the rotating shaft 2, and the bottom surface 4A is brought into contact with the end surface of the fitting projection 2F so that the bolt is inserted. The bolt 5 is screwed into the female screw hole 2G of the rotary shaft 2 through the hole 4C, so that the rotary shaft 2 is detachably attached to the distal end side. In this state, the bottom surface 4 </ b> A of the lid body 4 forms the groove bottom of the guide groove 3, and a cutting tool 6 described later can be held in the guide groove 3.

  The cutting tool 6 is provided in the guide groove 3 so as to be movable in the direction orthogonal to the rotation center OO, that is, in the length direction of the guide groove 3, and cuts the flash 103 generated in the machining hole 102 of the workpiece 101. It is. Here, the cutting tool 6 includes a holder 7 slidably provided along the guide groove 3, a V-shaped groove 8 formed in the holder 7, and a cutting blade 9 attached to the holder 7. It is configured.

  The holder 7 is formed in a prismatic shape corresponding to the cross-sectional shape of the guide groove 3 as a whole, a pair of side surfaces 7A that contact each side surface 3A of the guide groove 3, and an upper surface 7B that contacts the upper surface 3B of the guide groove 3; A bottom surface 7 </ b> C that contacts the bottom surface 4 </ b> A of the lid 4. Further, the base end side 7D in the length direction of the holder 7 is accommodated in the guide groove 3, and the tip end side 7E in the length direction of the holder 7 protrudes from the guide groove 3 to the outside. Here, the width dimension between the side surfaces 7A of the holder 7 is formed to be substantially equal to or slightly smaller than the groove width between the side surfaces 3A of the guide groove 3, and the holder 7 is formed of the side surface 3A of the guide groove 3 and the lid. 4 is slidably in contact with the bottom surface 4A.

  On the other hand, a substantially triangular cutting blade mounting portion 7 </ b> F formed by shaving the distal end side 7 </ b> E of the holder 7 is provided at the distal end portion of the holder 7. A female screw hole 7G for attaching the cutting blade 9 is formed in the cutting blade attaching portion 7F. In this case, the width dimension of the cutting blade attachment portion 7F is formed smaller than the width dimension of the holder 7 by the thickness dimension of the cutting blade 9 described later. Accordingly, the cutting blade 9 attached to the cutting blade attachment portion 7F of the holder 7 is configured to be accommodated in the guide groove 3 together with the holder 7.

  The V-shaped groove 8 is formed on the upper surface 7 </ b> B of the holder 7 at a portion facing the shaft hole 2 </ b> A of the rotating shaft 2. The V-shaped groove 8 is formed by recessing the upper surface 7B of the holder 7 in a V shape toward the bottom surface 7C. Thereby, the V-shaped groove 8 has two inclined surfaces 8A and 8B inclined obliquely along the length direction of the guide groove 3, and a portion where the inclined surfaces 8A and 8B intersect serves as a groove bottom portion 8C. Yes. And the V-shaped groove | channel 8 always contacts the spherical body 11B of the press member 11 mentioned later.

  The cutting blade 9 is attached to the cutting blade attachment portion 7F of the holder 7 and cuts the flash 103 generated in the machining hole 102 of the workpiece 101. The cutting blade 9 is made of, for example, a throw-away tip, and is detachably attached to the cutting blade attachment portion 7F of the holder 7 using a bolt 10 screwed into the female screw hole 7G.

  The cutting blade 9 is formed in a substantially square plate shape as a whole, and two sides of the cutting blade 9 protrude from the guide groove 3 to the outside in a state of being attached to the cutting blade attachment portion 7F of the holder 7. On the two sides of the cutting blade 9 protruding outward from the guide groove 3, a one-side blade portion 9A and another-side blade portion 9B are provided orthogonal to each other. In addition, a spherical portion 9C is provided at a corner portion (between the one-side blade portion 9A and the other-side blade portion 9B) where the one-side blade portion 9A and the other-side blade portion 9B intersect. In this case, as shown in FIG. 3, the cutting blade of the holder 7 is in a state where the one-side blade portion 9A and the other-side blade portion 9B are inclined by an angle θ (for example, 45 degrees) with respect to the rotation center OO. It is attached to the attachment portion 7F.

  Here, the one-side blade portion 9A of the cutting blade 9 cuts the flash 103 generated on the upper inner peripheral edge 102A that is the inner peripheral edge on one side in the axial direction of the machining hole 102 (see FIG. 5). The other side blade portion 9B of the cutting blade 9 cuts the flash 103 generated on the lower inner peripheral edge 102B which is the inner peripheral edge on the other side in the axial direction of the machining hole 102 (see FIG. 8). On the other hand, the spherical portion 9C positioned between the one-side blade portion 9A and the other-side blade portion 9B has an inner periphery of the machining hole 102 when the tip side 2C of the rotating shaft 2 passes through the machining hole 102 of the workpiece 101. By contacting the surface 102C, the inner peripheral surface 102C is prevented from being cut and the dimensional accuracy of the processed hole 102 is maintained.

  The pressing member 11 is provided in the shaft hole 2 </ b> A of the rotating shaft 2 so as to be movable in the axial direction (direction along the rotation center OO). The pressing member 11 includes a cylindrical push rod 11A having an outer diameter slightly smaller than the diameter of the shaft hole 2A, and a sphere 11B as a contact portion disposed on the other side in the axial direction of the push rod 11A. It is configured. A concave portion 11A1 is formed on the end surface of the push rod 11A on the other side in the axial direction, and a spherical body 11B is rotatably engaged with the concave portion 11A1. The spherical body 11B of the pressing member 11 is always in contact with a V-shaped groove 8 provided in the holder 7, and the pressing member 11 is pivoted toward the lid body 4 with the V-shaped groove 8 directed toward the lid body 4 by a biasing force of a spring member 12 described later. Press in the direction.

  The spring member 12 is located between a set screw 13 and a pressing member 11 described later, and is provided in the shaft hole 2 </ b> A of the rotating shaft 2. Here, the spring member 12 is formed by a compression coil spring and is provided so as to be able to expand and contract in the axial direction of the shaft hole 2 </ b> A in a state in which the spherical body 11 </ b> B of the pressing member 11 is constantly urged toward the V-shaped groove 8 of the holder 7. It has been.

  The set screw 13 is screwed into a female screw portion 2H formed in the shaft hole 2A of the rotary shaft 2. Between the set screw 13 and the spring member 12, a cylindrical abutment 14 is provided so as to be movable in the axial direction. Accordingly, by changing the screwing amount of the set screw 13 into the female screw portion 2H and adjusting the length (compression length) of the spring member 12 between the push rod 11A of the pressing member 11 and the metal plate 14, the pressing force is reduced. The biasing force (spring force) of the spring member 12 with respect to the member 11 can be adjusted. The abutment 14 is not necessarily required, and the spring member 12 may be in direct contact with the set screw 13.

  Next, the assembly work of the deburring tool 1 will be described.

  First, as shown in FIG. 2, the cutting blade 9 is attached to the cutting blade mounting portion 7 </ b> F of the holder 7 constituting the cutting tool 6 using the bolt 10. In this case, the cutting blade 9 includes the cutting blade mounting portion of the holder 7 in a state where the one-side blade portion 9A and the other-side blade portion 9B are inclined by an angle θ (for example, 45 degrees) with respect to the rotation center OO. 7F (see FIG. 3).

  Next, the holder 7 of the cutting tool 6 is disposed in the guide groove 3 provided on the distal end side 2 </ b> C of the rotating shaft 2, and the lid body 4 is attached to the end surface of the distal end side 2 </ b> C of the rotating shaft 2. In this case, the inner peripheral surface of the arcuate protrusion 4B provided on the lid 4 is fitted to the outer peripheral surface of the fitting projection 2F of the rotating shaft 2, and the bottom surface 4A is brought into contact with the end surface of the fitting projection 2F. In the state of contact, the bolt 5 inserted into the bolt insertion hole 4 </ b> C of the lid 4 is screwed into the female screw hole 2 </ b> G of the rotating shaft 2. Thereby, the lid body 4 is fixed to the end surface of the distal end side 2 </ b> C of the rotating shaft 2, and the cutting tool 6 can be held in the guide groove 3.

  In this state, the sphere 11B, the push rod 11A, the spring member 12, the abutment 14, and the set screw 13 constituting the pressing member 11 are sequentially inserted into the shaft hole 2A of the rotating shaft 2 to be formed in the shaft hole 2A. A set screw 13 is screwed into the female screw portion 2H.

  Next, as shown in FIG. 3, the spherical body 11 </ b> B of the pressing member 11 is brought into contact with the inclined surfaces 8 </ b> A and 8 </ b> B of the V-shaped groove 8 provided in the holder 7 of the cutting tool 6. And the urging | biasing force of the spring member 12 with respect to the press member 11 is adjusted suitably by adjusting the screwing amount of the set screw 13 with respect to the internal thread part 2H of 2 A of shaft holes. Thereby, the assembly of the deburring tool 1 is completed.

  As shown in FIG. 3, the assembled deburring tool 1 has a force in the length direction of the guide groove 3 (direction perpendicular to the rotation center OO of the rotating shaft 2) with respect to the guide groove cutting tool 6. When not acting, the sphere 11B of the pressing member 11 comes into contact with the inclined surfaces 8A and 8B of the V-shaped groove 8 provided in the holder 7 of the cutting tool 6, and is stabilized at the position of the groove bottom 8C. Thereby, the cutting tool 6 is the position where the cutting blade 9 protrudes most from the guide groove 3, that is, the position where the distance between the spherical portion 9C of the cutting blade 9 and the rotation center OO of the rotating shaft 2 becomes the maximum. (Initial position).

  On the other hand, when a force in the length direction of the guide groove 3 is applied to the cutting tool 6, the holder 7 of the cutting tool 6 moves in a direction in which the cutting blade 9 approaches the rotation center OO of the rotary shaft 2. Try to move. At this time, since the spherical body 11B of the pressing member 11 urged by the spring member 12 is in contact with the V-shaped groove 8 provided in the holder 7, the force acting on the cutting tool 6 and the pressing member 11 are acted on. While the balance with the biasing force of the spring member 12 is maintained, the cutting tool 6 maintains the initial position.

  When the force acting on the cutting tool 6 exceeds the urging force of the spring member 12 acting on the pressing member 11, the holder 7 moves in a direction in which the cutting blade 9 approaches the rotation center OO of the rotating shaft 2. To do. At this time, the sphere 11B of the pressing member 11 separates from the inclined surface 8B of the V-shaped groove 8 against the urging force of the spring member 12, and moves in the direction of compressing the spring member 12 along the inclined surface 8A.

  On the other hand, when the force acting on the cutting tool 6 is removed, the sphere 11 </ b> B of the pressing member 11 presses the inclined surface 8 </ b> A of the V-shaped groove 8 toward the lid 4 by the biasing force of the compressed spring member 12. Thereby, the holder 7 of the cutting tool 6 moves along the guide groove 3 in a direction in which the cutting blade 9 is separated from the rotation center OO of the rotation shaft 2.

  Then, when the spherical body 11B of the pressing member 11 comes into contact with the inclined surfaces 8A and 8B of the V-shaped groove 8 provided in the holder 7 and is stabilized at the position of the groove bottom portion 8C, the cutting tool 6 has the cutting blade 9 Is held at the initial position protruding most from the guide groove 3.

  The deburring tool 1 according to this embodiment has the above-described configuration, and the deburring operation using the deburring tool 1 will be described below.

  As shown in FIG. 1, the deburring operation is to remove the flash 103 generated on the upper inner peripheral edge 102A and the lower inner peripheral edge 102B of the processed hole 102 when the processed hole 102 is formed in the workpiece 101. .

  When performing the deburring operation, the base end side 2B of the rotary shaft 2 is attached to the spindle 104 as the rotation source shown in FIG. Thereby, the deburring tool 1 moves in the direction indicated by the arrow B or the direction indicated by the arrow C along the rotation center OO while rotating in the direction indicated by the arrow A in FIG. 4 around the rotation center OO. To do.

  Here, as shown in FIG. 4, when the cutting blade 9 is separated from the processing hole 102, the spherical body 11 </ b> B of the pressing member 11 urged by the spring member 12 is provided on the holder 7 of the cutting tool 6. It abuts on the inclined surfaces 8A and 8B of the groove 8 and is stabilized at the position of the groove bottom 8C. As a result, the cutting tool 6 is held at the initial position where the cutting blade 9 protrudes most from the guide groove 3, and the rotary shaft 2 rotates in the direction indicated by the arrow A with the cutting tool 6 held at the initial position.

  Next, as shown in FIG. 5, the rotary shaft 2 is moved in the direction indicated by the arrow B along the rotation center OO, and the one-side blade portion 9 </ b> A of the cutting blade 9 is moved to the upper inner peripheral edge 102 </ b> A of the processing hole 102. Make contact. Here, the one-side blade portion 9A of the cutting blade 9 is disposed to be inclined by an angle θ with respect to the rotation center OO (see FIG. 3). For this reason, a force in a direction approaching the rotation center OO acts on the cutting blade 9.

  At this time, since the spherical body 11B of the pressing member 11 biased by the spring member 12 is in contact with the V-shaped groove 8 provided in the holder 7, the cutting tool 6 tries to maintain the initial position. By further moving the rotary shaft 2 in the direction indicated by the arrow B, the one-side blade portion 9A of the cutting blade 9 is pressed against the upper inner peripheral edge 102A of the machining hole 102, and the cutting blade 9 is rotated about the center of rotation O against the cutting tool 6. A force in a direction approaching -O acts.

  Thereby, the one side blade part 9A of the cutting blade 9 can be pressed against the upper inner peripheral edge 102A of the processing hole 102 with an appropriate force. Therefore, the flash 103 generated on the upper inner peripheral edge 102A can be easily cut over the entire circumference by the rotating one-side blade portion 9A, and chamfering can be performed over the entire circumference of the upper inner peripheral edge 102A. it can.

  On the other hand, when the force acting on the cutting tool 6 exceeds the urging force of the spring member 12 acting on the pressing member 11, the cutting tool 6 moves in the direction in which the cutting blade 9 approaches the rotation center OO along the guide groove 3. Move to. At this time, the spherical body 11B of the pressing member 11 separates from the inclined surface 8B of the V-shaped groove 8 against the biasing force of the spring member 12, and moves (rolls) along the inclined surface 8A in the direction of compressing the spring member 12. Move). Thereby, as shown in FIG. 6, the cutting blade 9 of the cutting tool 6 is immersed in the processing hole 102, and the spherical portion 9 </ b> C of the cutting blade 9 comes into contact with the inner peripheral surface 102 </ b> C of the processing hole 102.

  Here, when the cutting blade 9 of the cutting tool 6 is immersed in the machining hole 102, the spherical portion 9C of the cutting blade 9 comes into contact with the inner peripheral surface 102C of the machining hole 102 as shown in FIG. Thereby, the inner peripheral surface 102C of the machining hole 102 can be prevented from being carelessly cut by the cutting blade 9, and the dimensional accuracy of the machining hole 102 can be maintained.

  Next, the rotary shaft 2 is further moved in the direction indicated by the arrow B along the rotation center OO, and the cutting tool 6 is projected to the lower surface side of the workpiece 101 through the machining hole 102 as shown in FIG.

  In this state, when the cutting tool 6 is separated from the processing hole 102, the spherical body 11B of the pressing member 11 comes into contact with the inclined surfaces 8A and 8B of the V-shaped groove 8 provided in the holder 7 of the cutting tool 6, Stable at the position of the groove bottom 8C. Thereby, the cutting tool 6 is held at the initial position where the cutting blade 9 protrudes most from the guide groove 3.

  Next, the other side blade portion 9B of the cutting blade 9 is brought into contact with the lower inner peripheral edge 102B of the machining hole 102 by moving the rotary shaft 2 in the direction of arrow C along the rotation center OO. Here, since the other-side blade portion 9B is disposed at an angle θ with respect to the rotation center OO, a force in a direction approaching the rotation center OO acts on the cutting blade 9. .

  In this case, since the spherical body 11B of the pressing member 11 urged by the spring member 12 is in contact with the V-shaped groove 8 provided in the holder 7, the cutting tool 6 tries to maintain the initial position. By further moving the rotary shaft 2 in the direction indicated by the arrow C, the other blade portion 9B of the cutting blade 9 is pressed against the lower inner peripheral edge 102B of the machining hole 102, and the cutting blade 9 is rotated with respect to the cutting tool 6. A force in a direction approaching OO acts.

  Thereby, the other side blade portion 9B of the cutting blade 9 can be pressed against the lower inner peripheral edge 102B of the processing hole 102 with an appropriate force. Therefore, the flash 103 generated on the lower inner peripheral edge 102B can be easily cut over the entire circumference by the rotating other-side blade portion 9B, and the entire circumference of the lower inner peripheral edge 102B is chamfered. be able to.

  In this case, the deburring tool 1 according to the present embodiment mainly includes a rotating shaft 2 provided with a guide groove 3 on the distal end side 2C, and a cutting blade 9 provided in a movable manner in the guide groove 3. 4 members including a tool 6, a pressing member 11 having a sphere 11 </ b> B that abuts on the V-shaped groove 8 of the cutting tool 6, and a spring member 12 that constantly biases the sphere 11 </ b> B of the pressing member 11 toward the V-shaped groove 8. It is configured. For this reason, the structure of the deburring tool 1 can be simplified by reducing the number of parts. As a result, the deburring tool 1 according to the present embodiment can reduce the risk of damage to each component, and can increase the durability of the deburring tool 1 as a whole. Furthermore, the deburring tool 1 according to the present embodiment can contribute to a reduction in manufacturing cost by reducing the number of parts.

  According to the deburring tool 1 according to the present embodiment, the pressing member 11 uses the sphere 11 </ b> B as a contact portion that contacts the V-shaped groove 8 of the holder 7. Thereby, since the sphere 11B moves (rolls) while rotating on the inclined surface 8A of the V-shaped groove 8, friction generated between the inclined surface 8A and the sphere 11B can be suppressed. Therefore, the holder 7 can be smoothly moved along the guide groove 3, and the reliability of the deburring tool 1 can be improved.

  In the deburring tool 1 according to the present embodiment, the cutting blade 9 of the cutting tool 6 has a one-side blade portion 9A for cutting the flash 103 generated on the upper inner peripheral edge 102A on one side in the axial direction of the processing hole 102, and a processing The other side blade portion 9B that cuts the flash 103 generated on the lower inner peripheral edge 102B, which is the other side in the axial direction of the hole 102, is located between the one side blade portion 9A and the other side blade portion 9B. And a spherical portion 9C that comes into contact with the inner peripheral surface 102C.

  Thereby, when the cutting tool 6 attached to the tip side 2C of the rotating shaft 2 is inserted into the machining hole 102 from the upper surface side of the workpiece 101, the flash 103 of the upper inner peripheral edge 102A is formed by the one side blade portion 9A of the cutting blade 9. When the cutting tool 6 is inserted into the machining hole 102 from the lower surface side of the workpiece 101, the flash 103 on the lower inner peripheral edge 102B can be cut by the other blade portion 9B of the cutting blade 9. .

  Accordingly, while the cutting tool 6 attached to the tip side 2C of the rotating shaft 2 is moved between the upper surface side and the lower surface side of the workpiece 101 through the processing hole 102, the upper inner peripheral edge 102A and the lower inner side of the processing hole 102 are moved. The flash 103 generated on the periphery 102B can be efficiently removed. On the other hand, when the cutting tool 6 moves in the axial direction between the upper inner peripheral edge 102B and the lower inner peripheral edge 102B of the processing hole 102, the spherical portion 9C of the cutting blade 9 is formed on the inner peripheral surface 102C of the processing hole 102. Abut. Thereby, the inner peripheral surface 102C of the machining hole 102 can be prevented from being carelessly cut by the cutting blade 9, and the dimensional accuracy of the machining hole 102 can be maintained.

  In the embodiment, the case where the pressing member 11 is configured by a cylindrical push rod 11A and a sphere 11B that is rotatably engaged with the recessed portion 11A1 of the push rod 11A is illustrated.

  However, the present invention is not limited to this. For example, as shown in FIG. 9, the pressing member is formed by a cylindrical push rod 15 integrally formed with a spherical contact portion 15 </ b> A that contacts the V-shaped groove 8. It may be configured.

  In addition, the pressing member 11 according to the embodiment is configured by two members of the push rod 11A and the sphere 11B. However, the present invention is not limited to this, and for example, the sphere 11B is engaged with the recessed portion 11A1 of the push rod 11A. In this state, the sphere 11B may be fixed to the push rod 11A by means such as welding.

  Moreover, in embodiment, the case where the bottom part of the guide groove 3 was formed with the cover body 4 by attaching the cover body 4 to the end surface of the front end side 2C of the rotating shaft 2 is illustrated. However, the present invention is not limited to this, and a configuration may be adopted in which a lid is unnecessary by forming a bottomed guide groove on the distal end side of the rotating shaft.

  Furthermore, in the embodiment, the case where the flash 103 generated in the peripheral edge portion of the machining hole 102 is cut with the rotating shaft 2 extending in the vertical direction (upward and downward) is illustrated, but the present invention is not limited thereto. For example, the flash 103 generated at the peripheral edge of the processing hole 102 may be cut in a state where the rotating shaft 2 extends in the horizontal direction.

DESCRIPTION OF SYMBOLS 1 Deburring tool 2 Rotating shaft 2A Shaft hole 2B Base end side 2C Tip end 3 Guide groove 6 Cutting tool 8 V-shaped groove 8A, 8B Inclined surface 9 Cutting blade 9A One side blade part 9B Other side blade part 9C Spherical part 11 Press Member 11B Sphere (contact part)
12 Spring member 15 Push rod (Pressing member)
15A Contact portion 101 Work 102 Processing hole 103 Beam 104 Spindle (Rotation source)

Claims (3)

A hollow cylindrical rotary shaft having a shaft hole extending along the rotation center, the base end side in the axial direction being attached to the rotation source and the tip side in the axial direction being inserted into a processing hole formed in the workpiece;
A guide groove that is provided on the distal end side of the rotary shaft and extends in a direction perpendicular to the rotation center of the rotary shaft in a state communicating with the shaft hole of the rotary shaft;
A cutting tool provided in the guide groove so as to be movable in a direction perpendicular to the rotation center of the rotation shaft, and provided with a cutting blade for cutting the flash at a portion protruding from the guide groove;
A V-shaped groove having a V-shaped inclined surface which is provided in the cutting tool at a portion facing the shaft hole of the rotating shaft and which is inclined obliquely along the length direction of the guide groove;
A pressing member provided in the shaft hole of the rotating shaft so as to be movable in the axial direction and having a contact portion that contacts the V-shaped groove on the other side in the axial direction;
A spring member provided in the shaft hole of the rotating shaft in a state in which the contact portion of the pressing member is constantly urged toward the V-shaped groove,
When the distal end side of the rotating shaft is inserted into the machining hole and the cutting blade of the cutting tool is pressed against the machining hole, the cutting tool moves along the guide groove and the spring member is attached. A deburring tool configured to remove the flash generated in the processing hole by moving the contact portion of the pressing member along the inclined surface of the V-shaped groove against a force.   The deburring tool according to claim 1, wherein the pressing member is configured to use a sphere as the contact portion.   The cutting blade of the cutting tool includes a one-side blade portion that cuts the flash generated on the inner peripheral edge on one axial side of the processing hole, and the flash generated on the inner peripheral edge on the other axial side of the processing hole. The structure according to claim 1 or 2, further comprising: an other side cutting portion for cutting a surface, and a spherical portion located between the one side cutting portion and the other side cutting portion and contacting the inner peripheral surface of the machining hole. Deburring tool as described.

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