Attaching / detaching tool and processing tool to which the same is fitted

Abstract

To provide a floater which easily replaced with a floater for removing deburrs from a front surface and which removes burrs on a rear surface.SOLUTION: An attaching / detaching tool 30 detachably fitted to a tool fitting hole 21c of a tool holder 20 having the tool fitting hole 21c and a holder 25 disposed to be advanceable to / retreatable from a radial inside of the tool fitting hole 21c comprises: a housing 31 having an elastic body chamber 31f and a holder insertion hole 31c into which the holder 25 is inserted and supported at a predetermined position of the tool fitting hole 21c; a slider 36 to which a tip tool 43 having a blade in a base end direction can be fitted, which is supported on the housing 31 and reciprocated in the tool fitting hole 21c, and which has a guide groove 40 extending along the tool fitting hole 21c; an elastic body 39 which is disposed in the elastic body chamber 31f and which biases the slider 36 in the base end direction; and a rotation stopper 33 disposed in the housing 31 and inserted into the guide groove 40.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an attachment / detachment tool and a processing tool to which the attachment / detachment tool is attached. [Background technology]

[0002] A processing tool has been proposed in which the tool holder is detachable and the tool can be axially slid relative to the shank (JP 2023-58946 A, hereinafter referred to as Patent Document 1). In addition, a deburring tool has been proposed which includes a floater for deburring the back side which is inserted into a floater insertion hole, the floater having a guide groove, an elastomer chamber, and a ring-shaped elastomer receiver, a post having a head and being positioned inside the elastomer chamber, and an elastomer which is positioned inside the elastomer chamber between the head and the elastomer receiver and which urges the floater in the base end direction (Registered Utility Model Publication No. 3240218, hereinafter referred to as Patent Document 2). Summary of the Invention [Problem to be solved by the invention]

[0003] When replacing the floater of Patent Document 2, it is necessary to remove the tip tool and the post with a tool and assemble a different floater. In addition, the floater of Patent Document 2 cannot be replaced with a floater that removes burrs from the surface. An object of the present invention is to provide a floater for deburring the back surface which can be easily replaced with a floater for deburring the front surface. [Means for solving the problem]

[0004] The first aspect of the present invention is A removable tool is removable to a tool mounting hole of a tool holder having a tool mounting hole and a holder arranged to be movable toward and away from a radial inside of the tool mounting hole, A housing supported at a predetermined position in the tool mounting hole, An elastic chamber; a holder insertion hole into which the holder is inserted; a housing having a slider capable of mounting a tool tip having a blade in a base end direction, the slider being supported by the housing, reciprocating within the tool mounting hole, and having a guide groove extending along the tool mounting hole; an elastic body disposed in the elastic body chamber and biasing the slider in a proximal direction; a rotation prevention body that is disposed in the housing and is inserted into the guide groove; It is an attachment / detachment tool having the following features.

[0005] A second aspect of the present invention is A tool holder, comprising: Tool mounting holes, A holder arranged to be movable toward and away from the inside of the tool mounting hole; A pusher that is arranged in the tool mounting hole so as to be movable forward and backward; a tool holder having A slide tool that is detachably attached to the tool attachment hole, a slide body to which a first tool bit having a blade in a distal direction is attached, which is biased in a distal direction by the pusher and reciprocates in the tool mounting hole, the slide body having a first guide groove on an outer circumferential surface of the slide body, the first guide groove extending along the tool mounting hole and into which the holder is inserted; A slide tool having A mounting / removal tool is attached to the tool mounting hole in place of the slide tool, A housing supported at a predetermined position in the tool mounting hole, An elastic chamber; a holder insertion hole into which the holder is inserted; a housing having a slider capable of mounting a tool tip having a blade in a base end direction, the slider being supported by the housing, reciprocating within the tool mounting hole, and having a second guide groove extending along the tool mounting hole; an elastic body disposed in the elastic body chamber and biasing the slider in a proximal direction; a rotation prevention body that is disposed in the housing and is inserted into the second guide groove; A mounting / removal tool having The processing tool has the following features:

[0006] The tool tip may be, for example, a cutting tool, a brush, or an abrasive tool. The tool tip may be integral with the slider or the slide body. The tool tip may be fastened to the slider or the slide body by shrink fitting or a collet. The retainer insertion hole may be arranged on the outer circumferential surface of the housing. The guide groove may be disposed from the tip to the center of the stem. The elastic chamber may extend along the tool mounting hole.

[0007] The stem or the inner surface of the elastic body chamber may guide the elastic body. The stem may be formed integrally with the slide body. The stem may have a male thread at a base end. The stem may have an abutting cylindrical portion. The elastic body receiver may have a female thread that mates with the male thread of the stem. The elastic body receiver may have a cylindrical inner surface that abuts against the abutting cylindrical portion. The stem may have a female thread at a base end. The stem may have a cylindrical inner surface. The elastic receiver may have a male thread that meshes with the female thread of the stem. The elastic receiver may have an abutting cylindrical portion that abuts against the cylindrical inner surface of the stem.

[0008] The stem may be formed integrally with the elastic receiver. The stem may be screwed to the slide body. In this case, the slide body and the stem may have cylindrical surfaces that abut against each other. The elastic body receiver may be detachably connected to the stem or the slide body. For example, the elastic body receiver is screwed to the stem. In this case, the elastic body receiver and the stem may have cylindrical surfaces that abut against each other.

[0009] The elastic body may be, for example, a compression coil spring or an extension coil spring. The extension coil spring may be disposed between a base end of the elastic body chamber and the slider.

[0010] The slider may slide inside the housing. In this case, the housing may have an elastic body support post arranged in the center of the housing. The elastic body support post has, for example, an elastic body support part at its tip. The slider may have a skirt extending in the base end direction beyond the elastic body support part, and an elastic body receiver arranged at the base end of the skirt. The compressible elastic body is arranged between the elastic body receiver and the elastic body support part. The elastic body is, for example, a compression coil spring. Effect of the Invention

[0011] According to the present invention, it is possible to provide a removable tool for deburring the back surface, which can be easily replaced with a floater for deburring the front surface. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a state in which a removable tool is attached to and detached from a tool holder according to the first embodiment; [Diagram 2] Exploded view of the attachment / detachment tool of the first embodiment [Diagram 3] Movement amount relative to the rotation angle of the attachment / detachment tool of the first embodiment [Figure 4] FIG. 1 is a vertical cross-sectional view showing a method of using the processing tool according to the first embodiment; [Diagram 5] FIG. 1 is a vertical cross-sectional view showing a state in which a slide tool is attached to and detached from a tool holder according to the first embodiment; [Figure 6] The slide tool of embodiment 1 [Figure 7] FIG. 11 is a vertical cross-sectional view showing a tool holder and a removable tool according to a second embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] <Embodiment 1> As shown in Fig. 1, the processing tool 10 of this embodiment has a tool holder 20 and a detachable tool 30. Here, the right half of Fig. 1 shows a state in which the trigger 23 is at the processing position 3 and the detachable tool 30 is attached. The left half of Fig. 1 shows a state in which the trigger 23 is at the detachable position 5 and the detachable tool 30 is detached from the tool holder 20. The detachable tool 30 in Fig. 1 is a half-side cross-sectional view. The tool holder 20 has a body 21 , a trigger 23 , a ball (holding body) 25 , a pusher 27 , and a spring 29 .

[0014] The body 21 has a shank 21a, a tool mounting hole 21c, a ball hole 21d, and a spring chamber 21f. The body 21 is attached to, for example, a spindle of a machine tool (not shown) and rotates around a central axis 1. The shank 21a, the tool mounting hole 21c, and the spring chamber 21f are arranged along the central axis 1. The tool mounting hole 21c is arranged at the tip of the body 21. The spring chamber 21f is connected to the tool mounting hole 21c. The ball hole 21d penetrates the body 21 in the radial direction.

[0015] The ball 25 is inserted into the ball hole 21d. The trigger 23 has a hollow cylindrical shape and is disposed radially outward of the body 21. The trigger 23 has a pressing surface 23a and a recess 23b. The trigger 23 reciprocates between the machining position 3 and the attachment / detachment position 5. When the trigger 23 is in the machining position 3, the pressing surface 23a causes the ball 25 to protrude into the tool mounting hole 21c. When the trigger 23 is in the attachment / detachment position 5, the ball 25 is housed in the recess 23b.

[0016] The spring 29 is a compression coil spring. The spring 29 is disposed in the spring chamber 21f. The pusher 27 reciprocates inside the tool mounting hole 21c. The pusher 27 is biased by the spring 29 in the direction of the tip.

[0017] 1 and 2, the attachment / detachment tool 30 has a housing 31, a ball (rotation stopper) 33, a ball ring 35, a slider 36, and a spring (elastic body) 39. All of the components constituting the attachment / detachment tool 30 are disposed about a central axis 1.

[0018] The housing 31 has a housing body 31a, a small cylinder portion 31b, a holder insertion hole 31c, a ball holding hole 31d, a spring chamber (elastic chamber) 31f, and a stem hole 31h. The housing 31 is hollow cylindrical. The outer cylindrical surface of the housing body 31a abuts against the tool mounting hole 21c. The small cylinder portion 31b extends from the tip end of the housing body 31a. The holder insertion hole 31c is disposed on the outer cylindrical surface of the housing body 31a. The holder insertion hole 31c is semispherical and has substantially the same diameter as the ball 25. The holder insertion hole 31c abuts against the ball 25. The spring chamber 31f is cylindrical and opens at the base end of the housing body 31a. The spring chamber 31f may have a large diameter portion 31f1 and a small diameter portion 31f2. The small diameter portion 31f2 is disposed toward the tip end of the large diameter portion 31f1. The stem hole 31h extends from the tip end of the housing 31 along the central axis 1. The stem hole 31h is connected to the spring chamber 31f.

[0019] The ball 33 is inserted into the ball holding hole 31d. The ball ring 35 is disposed in the small cylinder portion 31b and holds the ball 33.

[0020] The slider 36 has a slide body 37, a stem 38, a guide groove 40, and a spring receiver (elastic receiver) 41. The slide body 37 has a right cylindrical shape. The slide body 37 has a slide surface 37a and a tool hole 37b. The slide surface 37a slides in the tool mounting hole 21c. The tool hole 37b is disposed at the tip of the slide body 37.

[0021] The stem 38 is disposed at the base end of the slide body 37. The stem 38 has a right cylindrical shape. The stem 38 has a slide shaft 38a, a contact cylindrical portion 38b, and a male thread 38c. A plurality of guide grooves 40 (two in this embodiment) are formed in the slide shaft 38a rotationally symmetrically about the central axis 1. The guide groove 40 extends spirally about the central axis 1. The guide groove 40 has a lead angle α. The guide groove 40 may extend linearly along the central axis 1.

[0022] The spring bearing 41 is connected to the base end of the stem 38. The spring bearing 41 has a bearing portion 41a, a shaft portion 41b, an inner cylindrical portion 41d, and a female thread 41c. The diameter of the bearing portion 41a is larger than the outer diameter of the spring 39. Preferably, the bearing portion 41a slides on the large diameter portion 31f1 of the spring chamber 31f. The outer diameter of the shaft portion 41b is smaller than the inner diameter of the spring 39. The outer diameter of the shaft portion 41b is substantially equal to the outer diameter of the slide shaft 38a. The inner cylindrical portion 41d abuts against the abutting cylindrical portion 38b. The female thread 41c is fastened to the male thread 38c of the stem 38. The guide groove 40 is guided by the ball 33 , so that the slider 36 advances and retreats in a spiral manner within the housing 31 in the direction of the central axis 1 .

[0023] The tool tip 43 has a shank 43a, a reduced diameter portion 43b, and a blade portion 43c. The blade portion 43c is supported by the shank 43a via the reduced diameter portion 43b. The blade portion 43c has a cutting edge in the proximal direction. The shank 43a is fastened to the tool hole 37b.

[0024] The spring 39 is a compression coil spring. The spring 39 is inserted into the gap between the housing 31 and the stem 38. The spring 39 is supported by fastening a spring receiver 41 to the stem 38. The spring 39 is guided by the slide shaft 38a, the shaft portion 41b, and the small diameter portion 31f2. The spring 39 biases the slider 36 in the base end direction.

[0025] FIG. 3 shows the relationship between the position of the slide body 37 relative to the housing 31 and the rotation angle. The vertical axis shows the axial displacement amount h (see FIG. 1) of the slide body 37, with the cutting direction 2 (see FIG. 1) of the slide body 37 being negative. The horizontal axis shows the angular displacement θ (see FIG. 1) of the slide body 37, with the rotation direction of the processing tool 10 (clockwise toward the bottom in FIG. 1) being negative. The slide body 37 moves within a hatched area 45 in FIG. 3. In the area 45, the displacement amount h has a constant displacement width w for any angular displacement θ.

[0026] Fig. 4 shows the processing tool 10 with the attachment / detachment tool 30 attached in use. The right half of Fig. 4 shows the state in which the slider 36 is located at the base end. The left half of Fig. 4 shows the state in which the slider 36 moves toward the tip end to remove burrs from the workpiece 7. The processing tool 10 rotates in the -θ direction. The slider 36 moves, and the blade portion 43c comes into contact with the edge of the back surface of the workpiece 7 as viewed from the tool holder 20. The processing tool 10 moves in a direction perpendicular to the paper. The housing 31 is supported in a fixed position by the ball 25. The spring 29 is kept in a compressed state. The slider 36 is urged toward the base end by the elastic force of the spring 39. The slider 36 is guided by the guide groove 40. When the height of the edge of the workpiece 7 that the blade portion 43c comes into contact with changes with the movement of the processing tool 10, the spring 39 expands and contracts, and the slider 36 slides in the tool mounting hole. Here, the ball 33 and the guide groove 40 guide the slider 36. Since the guide groove 40 has a displacement width w and a lead angle α, the slider 36 advances and retreats depending on the magnitude of the cutting torque that the blade portion 43c receives.

[0027] As shown in Fig. 5, a slide tool 50 can be attached to the tool holder 20 in place of the attachment / detachment tool 30. Here, the right half of Fig. 5 shows a state in which the slide tool 50 is attached to the tool holder 20 and is machining the workpiece 7. The left half of Fig. 5 shows a state in which the slide tool 50 is detached from the tool holder 20.

[0028] As shown in Fig. 5 and Fig. 6, the slide tool 50 has a slide body 51, a tool tip 53, and a guide groove 52. The slide body 51 has a right cylindrical shape and slides in the rotational direction and axial direction with the tool mounting hole 21c. The tool tip 53 is mounted on the slide body 51. The tool tip 53 has a blade portion 53a. The blade portion 53a has a cutting edge in the tip direction. The slide body 51 is biased in the tip direction by the pusher 27. The cutting direction 2 of the slide tool 50 is directed downward in Fig. 5.

[0029] 5, the processing tool 10 rotates as a whole. Then, while bringing the tip tool 53 into contact with the workpiece 7, the processing tool 10 moves in a direction perpendicular to the plane of the drawing. Then, burrs are removed from the edge of the workpiece 7 on the tool holder 20 side, i.e., the front side of the workpiece 7. When the distance (height) of the workpiece 7 from the tool holder 20 varies, the entire slide tool 50 reciprocates inside the tool mounting hole 21c together with the pusher 27 in conjunction with the height of the workpiece 7. At this time, the ball 25 and the guide groove 52 guide the slide body 51.

[0030] The slide tool 50 receives cutting resistance in a counterclockwise direction when viewed from above and below in Fig. 6. The guide groove 52 generally describes a spiral that moves in the opposite direction to the cutting direction 2 (upward in Fig. 6) as it advances in the opposite direction (+θ) to the rotation direction of the processing tool 10. The rest of the structure of the guide groove 52 is substantially the same as the guide groove 40 of the attachment / detachment tool 30. However, the ball 25 is inserted into the guide groove 52.

[0031] The processing tool 10 of this embodiment provides the following advantages. When the attachment / detachment tool 30 is attached, the ball 25 holds the housing 31 in a fixed position, and the spring 29 does not substantially work. A spring 39 disposed inside the attachment / detachment tool 30 biases the slide body 37 in the base end direction. The processing tool 10 can remove burrs on the back surface of the workpiece 7 as viewed from the tool holder 20. The attachment / detachment tool 30 can be easily removed from the tool holder 20 by simply changing the position of the trigger 23 from the processing position 3 to the attachment / detachment position 5. When the slide tool 50 is attached to the tool holder 20 in place of the attachment / detachment tool 30, the ball 25 is inserted into the guide groove 52, and the pusher 27 urges the slide tool 50 toward the tip via the spring 29. The processing tool 10 can remove burrs from the front surface of the workpiece 7 as viewed from the tool holder 20. According to the processing tool 10 of this embodiment, the process of removing burrs from the front surface of the workpiece 7 and the process of removing burrs from the back surface of the workpiece 7 can be easily switched between by simply changing the attached tool.

[0032] Since the slide body 37 slides in the tool mounting hole 21c, the total runout of the slide body 37 is suppressed. In addition, the outer cylindrical surface of the housing 31 abuts against the tool mounting hole 21c, thereby improving the assembly accuracy of the attachment / detachment tool 30. Furthermore, the receiving portion 41a, which is the rear end portion of the slider 36, slides into the spring chamber 31f. Then, the front and rear ends of the slider 36 are guided into the tool mounting hole 21c, so that the total runout of the slide body 37 is further suppressed.

[0033] The spring chamber 31f opens at the rear end of the housing 31, and the spring receiver 41 is detachable from the stem 38. Therefore, the spring 39 can be easily replaced by removing the spring receiver 41 from the stem 38. Also, the strength with which the cutting edge 43c contacts the workpiece 7 is determined by the spring constant of the spring 39. According to this embodiment, the spring 39 can be easily replaced with another spring 39 having a different spring constant. This makes it possible to easily change the deburring strength.

[0034] The slide body 37 is disposed at the tip side of the housing 31. The slide body 37 slides in the tool mounting hole 21c. The housing 31 is supported by abutting against the tool mounting hole 21c. The spring 39, the stem 38 connected to the slide body 37, and the spring receiver 41 are accommodated inside the housing 31. This allows the attachment / detachment tool 30 to be configured compactly. The ball 33 is also incorporated in the housing 31. The guide groove 40 is disposed in the stem 38. This allows the attachment / detachment tool 30 to be configured even more compactly. The overall shape of the part of the attachment / detachment tool 30 that is inserted into the tool mounting hole 21c is a simple straight cylindrical shape. This allows the shape of the slide tool 50 to also be a simple straight cylindrical shape.

[0035] <Embodiment 2> 7, the processing tool 100 of this embodiment has a tool holder 120 and a mounting / detaching tool 30. Instead of the mounting / detaching tool 30, a slide tool 50 can be attached to the tool holder 120.

[0036] The tool holder 120 includes a case 161 , a body 121 , a main bearing 162 , a spindle motor 163 , a ball 25 , and a trigger 23 . The case 161 is hollow cylindrical. The case 161 is attached to, for example, an industrial robot. The body 121 is supported by the case 161 via a main bearing 162. The body 121 is a main shaft. The spindle motor 163 is disposed in the case 161. The spindle motor 163 has an output shaft 163a. ​​The output shaft 163a is connected to the body 121 by, for example, serrations. The configuration of the body 121 is substantially the same as that of the body 21 of the first embodiment. [Explanation of symbols]

[0037] 20, 120 Tool holder 21c Tool mounting hole 25 Ball (Holder) 30 Installation and removal tools 31 Housing 33 Ball (anti-rotation body) 36 Slider 40 Guide groove 39 Elastic Body

Claims

1. A removable tool is removable to a tool mounting hole of a tool holder having a tool mounting hole and a holder arranged to be movable toward and away from a radial inside of the tool mounting hole, A housing supported at a predetermined position in the tool mounting hole, An elastic chamber; a holder insertion hole into which the holder is inserted; a housing having a slider capable of mounting a tool tip having a blade in a base end direction, the slider being supported by the housing, reciprocating within the tool mounting hole, and having a guide groove extending along the tool mounting hole; an elastic body disposed in the elastic body chamber and biasing the slider in a proximal direction; a rotation prevention body that is disposed in the housing and is inserted into the guide groove; An attachment / detachment tool having

2. The slider is disposed on a tip side of the housing and has a slide body that slides in the tool mounting hole. The attachment / detachment tool according to claim 1 .

3. The housing has a stem hole connected to the elastic chamber, The slider includes: a stem extending through the stem hole; an elastic receiver disposed inside the elastic chamber and connected to a proximal end of the stem; having The elastic body is disposed between the housing and the elastic body receiver. The attachment / detachment tool according to claim 1 or 2.

4. The stem has the guide groove. The attachment / detachment tool according to claim 3.

5. The housing abuts against an inner surface of the tool mounting hole. The attachment / detachment tool according to claim 1 or 2.

6. The elastic body receiver slides inside the elastic body chamber. The attachment / detachment tool according to claim 3.

7. The elastic chamber opens to a base end of the housing, The elastic receiver is detachable from the slider. The attachment / detachment tool according to claim 3.

8. A tool holder, comprising: Tool mounting holes, A holder arranged to be movable toward and away from the inside of the tool mounting hole; A pusher that is arranged in the tool mounting hole so as to be movable forward and backward; a tool holder having A slide tool that is detachably attached to the tool attachment hole, a slide body to which a first tool bit having a blade in a distal direction is attached, which is biased in a distal direction by the pusher and reciprocates in the tool mounting hole, the slide body having a first guide groove on an outer circumferential surface of the slide body, the first guide groove extending along the tool mounting hole and into which the holder is inserted; A slide tool having An attachment / detachment tool that is attached to the tool attachment hole in place of the slide tool, A housing supported at a predetermined position in the tool mounting hole, An elastic chamber; a holder insertion hole into which the holder is inserted; a housing having a slider capable of mounting a tool tip having a blade in a base end direction, the slider being supported by the housing, reciprocating within the tool mounting hole, and having a second guide groove extending along the tool mounting hole; an elastic body disposed in the elastic body chamber and biasing the slider in a proximal direction; a rotation prevention body that is disposed in the housing and is inserted into the second guide groove; A mounting / removal tool having A processing tool having

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