Cutting device

Abstract

To provide a cutting device which can easily adjust a relative position of a cutting tool relative to a processed object.SOLUTION: In a cutting device, an adjustment ring 32 is rotated around an axis L relative to a positioning part 40 to change a relative position of the positioning part 40 relative to a milling cutter 23 in a direction in which the axis L extends. The structure allows a relative position of the milling cutter 23 relative to a processed object to be adjusted easily. Further, rotation of the adjustment ring 32 can be limited by operating a positioning plunger 34. The action inhibits the adjustment ring 32 from rotating to change the relative position of the milling cutter 23 relative to the processed object during work for processing the processed object with the cutting device 10.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a cutting device. [Background technology]

[0002] Conventionally, a chamfering machine is known as a cutting device (for example, Patent Document 1). Patent Document 1 discloses that a contact guide plate is fixed to a lock ring by screwing the contact guide plate into threads provided on the lock ring. By bringing the contact guide plate into contact with the workpiece, a cutting tool such as a cutter blade is positioned relative to the contact object. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-123564 Summary of the Invention [Problem to be solved by the invention]

[0004] In the prior art, when adjusting the relative position of a cutting tool with respect to a workpiece, it is considered to use a spacer. However, replacing the spacer requires removing the component that comes into contact with the workpiece, which is not easy. [Means for solving the problem]

[0005] A cutting device that solves the above problem comprises a cutting tool that rotates around an axis to cut a workpiece, and an adjustment mechanism that adjusts the relative position of the cutting tool and the workpiece, wherein the adjustment mechanism has a first part and a second part that contacts the workpiece, wherein threads formed on the first part engage with threads formed on the second part, and by rotating one of the first part and the second part relative to the other around the axis, the relative position of the second part to the cutting tool along the direction in which the axis extends changes, and the adjustment mechanism has a restriction means that restricts the relative rotation of one of the first part and the second part relative to the other. [Effects of the Invention]

[0006] According to the present invention, it is easy to adjust the relative position of the cutting tool with respect to the workpiece. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a plan view of the cutting device. [Figure 2] FIG. 2 is a bottom view of the cutting device. [Figure 3] FIG. 3 is a side view of the cutting device. [Figure 4] FIG. 4 is a cross-sectional view taken along line 4-4 shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the cutting device will be described. <Outline of cutting equipment> As shown in FIGS. 1 to 3, cutting device 10 is configured to remove weld beads 11a formed on object 11 to be processed.

[0009] The cutting device 10 includes a main body 20. The main body 20 includes a housing 21, a milling cutter 23, a support 24 that supports the milling cutter 23 rotatably around an axis L, and a drive unit 25 that drives the milling cutter 23. The milling cutter 23 is an example of a cutting tool. In the following description, the direction toward the tip end of the axial direction D of the milling cutter 23 is referred to as the +D direction, and the direction toward the base end is referred to as the -D direction.

[0010] 4, the support portion 24 has a rotor 24a to which the base end of the milling cutter 23 is fixed, and a holding portion 24b that holds the rotor 24a rotatably around the axis L of the milling cutter 23. The holding portion 24b is a frame-shaped member that is fixed to the housing 21 and surrounds the rotor 24a. The holding portion 24b has a flange 24c on its outer circumferential surface.

[0011] The drive unit 25 includes a motor 25a and a transmission unit 25b that transmits the rotation of the output shaft of the motor 25a to the rotor 24a. The motor 25a is driven by power supplied from a battery or a commercial power source. When the motor 25a is driven, the milling cutter 23 rotates around the axis L together with the rotor 24a.

[0012] The main body 20 is generally box-shaped and extends in a direction perpendicular to the axial direction D of the milling cutter 23. The main body 20 may include a handle (not shown). The handle is held by an operator when using the cutting device 10. The housing 21 may also serve as the handle.

[0013] The cutting device 10 includes an adjustment mechanism 30. The adjustment mechanism 30 is configured to adjust the relative distance of the milling cutter 23 with respect to the workpiece 11 in the axial direction D. The adjustment mechanism 30 includes a base 31. The base 31 is a cylindrical member extending along the axial direction D. The base 31 is fixed to the flange 24c so as to surround the milling cutter 23 and so that its center line coincides with the axis L of the milling cutter 23. The base 31 has an annular protrusion 31a that protrudes in the diameter direction from the outer circumferential surface around the entire circumference. The base 31 has an anti-rotation protrusion 31b that protrudes in the diameter direction from the outer circumferential surface on the +D direction side of the annular protrusion 31a.

[0014] The adjustment mechanism 30 includes an adjustment ring 32, which is an example of a first component. The adjustment ring 32 is a flat, cylindrical component. The adjustment ring 32 is disposed so as to surround the milling cutter 23 and the base 31, and so that its center line coincides with the axis L of the milling cutter 23. The adjustment ring 32 is supported so as to be rotatable around the axis L of the milling cutter 23. The adjustment ring 32 is sandwiched between the annular protrusion 31a of the base 31 and the flange 24c in the axial direction D.

[0015] The end face of the adjustment ring 32 on the -D direction side is in contact with the end face of the flange 24c on the +D direction side. The adjustment ring 32 has a screw thread 32a on its inner peripheral surface. The adjustment ring 32 is configured as a female screw as a whole. Scales 32b are provided on the outer peripheral surface of the adjustment ring 32 so as to divide the circumference into n equal parts (see FIG. 3). For example, n is 20, but is not limited to this, and may be less than 20 or 21 or greater. Positioning holes 32c are formed on the end face of the adjustment ring 32 on the -D direction side so as to align with the scales 32b toward the center in the diameter direction.

[0016] The adjustment mechanism 30 includes a moving part 33 supported by the base part 31 and the adjustment ring 32 so as to be movable back and forth along the axial direction D. The moving part 33 is a flat cylindrical part. The moving part 33 is disposed so as to surround the milling cutter 23 and the base part 31 and so that its center line coincides with the axis L of the milling cutter 23.

[0017] The moving part 33 has a screw thread 33a on its outer circumferential surface. The moving part 33 is configured as a male screw overall. The moving part 33 is held to the adjusting ring 32 by the interlocking of the screw thread 33a of the moving part 33 with the screw thread 32a of the adjusting ring 32. The moving part 33 engages with the anti-rotation protrusion 31b of the base 31, thereby preventing it from rotating as the adjusting ring 32 rotates. The inner circumferential surface of the moving part 33 contacts the outer circumferential surface of the base 31. In other words, the moving part 33 is guided by the outer circumferential surface of the base 31 so as to move along the axial direction D as the adjusting ring 32 rotates. The pitch of the screw threads 32a, 33a is such that when the adjusting ring 32 is rotated by one graduation indicated on the scale 32b, the moving part 33 moves a specified distance p along the axial direction D in the +D direction or the -D direction. For example, the specified distance p is 0.1 mm.

[0018] The adjustment mechanism 30 includes a positioning plunger 34 that limits the rotation of the adjustment ring 32. The positioning plunger 34 is an example of a restricting means and an example of a rod-shaped member. The positioning plunger 34 is inserted into a plunger hole 24e that is formed to penetrate the flange 24c in the axial direction D. The positioning plunger 34 is biased in the +D direction by a biasing means (not shown), such as a spring. A mark 24f is formed on the outer peripheral surface of the flange 24c at a position aligned with the plunger hole 24e in the diameter direction.

[0019] The distance from the axis L of the milling cutter 23 to the center of the plunger hole 24e is the same as the distance to the center of each positioning hole 32c. Therefore, when viewed from the axial direction D, as the adjusting ring 32 rotates, each positioning hole 32c can overlap with the plunger hole 24e. When the positioning hole 32c and the plunger hole 24e overlap, the positioning plunger 34 is inserted into the positioning hole 32c while still inserted into the plunger hole 24e. This state of the positioning plunger 34 is a restricted state in which the adjusting ring 32 cannot rotate. When the positioning plunger 34 is pulled up in the -D direction, the adjusting ring 32 is allowed to rotate.

[0020] A square plate-shaped wheel base 35 is fixed to the end of the moving part 33 on the +D direction side. A cutting tool hole 35a is formed in the wheel base 35 so as to penetrate in the axial direction D. The milling cutter 23 is disposed inside the cutting tool hole 35a. A recess 35b extending along the moving direction F of the cutting device 10 is formed in the surface on the +D direction side of the wheel base 35. The moving direction F coincides with the direction in which the weld bead 11a of the workpiece 11 extends.

[0021] The wheel base 35 has metal wheels 36 at both ends in a width direction W that intersects (preferably perpendicular to) the movement direction F and the axial direction D. Each wheel 36 is a roller and is provided at the center of the wheel base 35 in the movement direction F. When viewed from the width direction W, the axis L of the milling cutter 23 and the rotation axis (center) of each wheel 36 coincide with each other. The wheel base 35 has two auxiliary wheels 39 at both ends in the width direction W, respectively, to sandwich each wheel 36 in the movement direction F. Each wheel 36, 39 protrudes in the +D direction beyond the wheel base 35. Each wheel 36, 39 is an example of a portion that contacts the workpiece 11. The moving unit 33, the wheel base 35, and the wheels 36, 39 constitute a positioning unit 40, which is an example of a second component.

[0022] Each wheel 36 has a magnetic contact mechanism 37. Each contact mechanism 37 includes a cylindrical housing 37a and two columnar permanent magnets 37b, 37c stacked along the axial direction D. The permanent magnet 37b on the +D direction side is fixed to the housing 37a. The permanent magnet 37c on the -D direction side is accommodated in the housing 37a so as to be rotatable around its central axis.

[0023] Each abutment mechanism 37 includes a lever 37d that rotates the permanent magnet 37c. Operating the lever 37d switches between a first arrangement state in which the polarities of the permanent magnets 37b, 37c are aligned in the axial direction D, and a second arrangement state in which the polarities of the permanent magnets 37b, 37c are opposite in the axial direction D. Operating the lever 37d in each abutment mechanism 37 can switch the magnetic force on and off. If the workpiece 11 is a magnetic body, when the permanent magnets 37b, 37c are in the first arrangement state, the magnetic force attracts the wheel 36 to the workpiece 11. Each abutment mechanism 37 may be an electromagnet that generates a magnetic field when energized.

[0024] <Actions and Effects of the Embodiment> The operation and effects of the embodiment will be described. (1) By rotating the adjustment ring 32 around the axis L relative to the positioning part 40, the relative position of the positioning part 40 with respect to the milling cutter 23 changes in the direction of extension of the axis L. This allows the relative position of the milling cutter 23 with respect to the workpiece 11 to be easily adjusted. Then, by operating the positioning plunger 34, the rotation of the adjustment ring 32 can be limited. This prevents the adjustment ring 32 from rotating during the operation of machining the workpiece 11 using the cutting device 10, which would change the relative position of the milling cutter 23 with respect to the workpiece 11. This makes it easy to adjust the relative position of the cutting tool with respect to the workpiece 11.

[0025] (2) The positioning plunger 34 can be displaced between a restricting position that restricts the rotation of the adjustment ring 32 and an allowing position that allows the rotation of the adjustment ring 32. Therefore, the restriction and permission of the rotation of the adjustment ring 32 can be easily changed.

[0026] (3) The contact mechanism 37 uses magnetic force to bring the wheel 36, which is a roller, into contact with the workpiece 11. This allows the cutting device 10 to be easily fixed to the workpiece 11.

[0027] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0028] In addition to or instead of the adjustment ring 32, the adjustment mechanism 30 may be configured to move the moving part 33 along the axial direction D by rotating the moving part 33. The processing using the cutting device 10 is not limited to removing the weld bead 11a from the workpiece 11. For example, the cutting device 10 may be a device that removes burrs formed on the edge of the workpiece 11, or may be a device that performs R-chamfering, C-chamfering, grooving, or polishing. The cutting tool may be changed depending on the processing content.

[0029] The cutting device 10 is configured to be portable by the operator, but may be a stationary device. The cutting device 10 does not need to include the abutment mechanism 37. <Additional Notes> The technical ideas that can be understood from the above-described embodiment and modified examples will be described.

[0030] (Note 1) The contact mechanism is configured so that the magnetic force can be switched on and off. (Note 2) The roller is made of a magnetic material. [Explanation of symbols]

[0031] 10...cutting processing device, 11...workpiece, 23...milling cutter, 30...adjusting mechanism, 32...adjusting ring, 32a...screw thread, 33...moving part, 33a...screw thread, 34...positioning plunger, 36...roller, 37...contact mechanism, 39...auxiliary roller, 40...positioning part, L...axis.

Claims

1. a cutting tool that rotates around an axis to cut a workpiece; an adjustment mechanism for adjusting a relative position of the cutting tool with respect to the workpiece, the adjustment mechanism has a first part and a second part that contacts the workpiece; a thread formed on the first part and a thread formed on the second part are engaged with each other, and by rotating one of the first part and the second part relative to the other about the axis, a relative position of the second part with respect to the cutting tool changes in the direction in which the axis extends; A cutting device comprising a restricting means for restricting relative rotation of one of the first part and the second part with respect to the other.

2. When the first component is rotated around the axis, the second component moves along the direction in which the axis extends, the restricting means includes a rod-shaped member extending along the axis, The cutting device according to claim 1 , wherein the rod-shaped member is configured to be displaceable between a restricting position that restricts rotation of the first component and an allowing position that allows rotation of the first component.

3. the second part includes a roller as a part that contacts the workpiece, 3. The cutting device according to claim 1, further comprising a contact mechanism that causes the roller to contact the workpiece by magnetic force.

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