JP2009214234A - Deburring tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deburring tool that can be easily mounted on a machine tool and can finish the work at a uniform state by flexibly processing uneven burr. <P>SOLUTION: The deburring tool 1 has a shank 2 to be detachably mounted on a main shaft of the machine tool and a tool holding member 4 rotatably mounted on the shank 2 together with the shank 2 via a support member 3. The support member 3 has a tilting urging means 5 for urging the tool holding member 4 against a shank 2 by tiltably supporting the tool holding member 4 to the shank shaft in a loosely-fitting state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a deburring tool, and more particularly to a deburring tool in which a tool holding member can be tilted with a simple configuration.

  Conventionally, as a means of removing burrs from cast parts such as aluminum die-casting, it is performed manually by a grinder, etc., polished with a brush tool for deburring, or attached to a machining center with a cutting tool to follow the casting shape. A method of operating to draw a locus is employed (for example, Patent Documents 1 and 2).

JP 2006-224288 A (FIG. 1) JP-A-2005-349549 (paragraph 0017, FIG. 1)

However, when removing manually, there was a problem that it was very inefficient and could not be handled if the quantity increased. In addition, when removing by attaching a cutting tool to the machining center, there is a problem that accurate and uniform removal cannot be performed for products having individual variations in finished dimensions such as cast parts.
In the case of a brush tool, variations in the workpiece shape can be tolerated to some extent, but there is a limit to the size of burrs that can be removed, and there has been a problem that grinding traces of brush polishing remain in addition to the burrs where the workpieces are generated.

  In addition, the deburring tool described in Patent Document 1 has limitations on the size and material of the burr that can be removed. There was a problem that had to be done.

  Accordingly, the present invention provides a deburring tool that can be easily mounted on a machine tool and can flexibly cope with non-uniform burrs and finish a uniform work surface in order to solve the above-described problems. Is an issue.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes a shank that is detachably attached to a main spindle of a machine tool, and a tool holder that is attached to the shank so as to rotate integrally with the shank via a support member. A deburring tool having a member, wherein the support member is loosely supported so as to be freely tiltable with respect to the shank shaft, and the tool holding member is biased to the shank. It is characterized by providing a biasing means.

As described above, the present invention includes the tilting biasing means for biasing and supporting the tool holding member by the support member so as to be tiltable with respect to the shank shaft and biasing the tool holding member to the shank. Thus, the tool holding member rotates integrally with the shank and is configured to be tiltable with respect to the axial direction of the shank. For this reason, since the tool holding member can tilt and follow the burr contour even with a non-uniform burr, the non-uniform burr can be flexibly dealt with and finished to a uniform processing surface. .
Further, the deburring tool according to the present invention can be easily mounted on the machine tool because it can be deburred only by being mounted on the machine tool without providing a separate detent means.

  The invention according to claim 2 is the deburring tool according to claim 1, wherein the tilting biasing means is configured to bias the tool holding member in a direction opposite to the biasing direction of the tilting biasing means. A tilting urging force adjusting means for adjusting the urging force is provided.

  According to the second aspect of the present invention, since the tilt urging force adjusting means is provided, it is possible to adjust the lateral load (the machining pressing force in the direction orthogonal to the axial direction) when the tool holding member tilts. Even for non-uniform burrs, it is possible to remove the burrs uniformly by adjusting the lateral load flexibly according to the state of the burrs.

  The invention according to claim 3 is the deburring tool according to claim 2, wherein the tilting biasing force adjusting means includes a ball that abuts on the tool holding member, a ball holder that holds the ball, and the ball And a spring for urging the holder in the opposite direction.

  According to the third aspect of the present invention, since the ball that contacts the tool holding member is provided, the ball holder can follow even if it is tilted. Power can be granted.

  A fourth aspect of the present invention is the deburring tool according to any one of the first to third aspects, wherein the tool holding member includes a collet holder that holds the tool and a collet holder that holds the collet holder. A collet holder body that rotates integrally with the shank, and a pressing force adjustment biasing means that biases the collet holder toward the distal end side in the shank axial direction to adjust a processing pressing force.

  According to the fourth aspect of the present invention, since the pressing force adjusting biasing means for adjusting the axial processing pressing force can be provided, the processing pressing force can be automatically adjusted. It is possible to remove burrs evenly.

  The deburring tool according to the present invention can be easily mounted on a machine tool, and can be finished to a uniform processed surface flexibly corresponding to non-uniform burrs.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the drawings to be referred to, FIG. 1 is a front sectional view for explaining a configuration of a deburring tool according to an embodiment of the present invention. 2A and 2B are cross-sectional views of FIG. 1, in which FIG. 2A shows an AA section, FIG. 2B shows a BB section, FIG. 2C shows a CC section, and FIG. 2D shows a DD section.

  As shown in FIG. 1, a deburring tool 1 according to an embodiment of the present invention includes a shank 2 that is detachably attached to a main shaft of a machine tool (not shown) and ten needles 3 that are support members on the shank 2. And a collet holder body 41 and a collet holder 42 which are tool holding members 4 attached so as to rotate integrally with the shank 2, and a clutch spring 5 which is a tilting biasing means for biasing the collet holder body 41 to the shank 2. The body 21 fixed to the shank 2 so as to accommodate the clutch spring 5, the tilting biasing force adjusting means 6 for adjusting the biasing force of the clutch spring 5 with the ball set spring 63, and the collet holder 42 at the front end in the shank axial direction. A return spring 8 that is a pressing force adjusting biasing means that biases the pressing force to adjust the processing pressing force. It is equipped with a.

  The deburring tool 1 according to the present invention uses the name “deburring”, but it is not limitedly interpreted. Can also be suitably used.

As shown in FIG. 1, the shank 2 has a stepped columnar shape having an enlarged diameter portion 22 on the front side of the outer peripheral surface and a reduced diameter portion 23 on the rear side. A body 21 is screwed into the enlarged diameter portion 22. The reduced diameter portion 23 is configured to have a predetermined diameter or shape so that it can be attached to a processing machine such as a machining center (not shown).
The inner peripheral portion of the shank 2 is formed with a through hole having a diameter enlarged on the front side and a diameter reduced on the rear side, and a tilting urging force adjusting means 6 is mounted.

  The needle 3 is configured by a pin having a cylindrical shape, and as an example, ten needles 3 are arranged at equal intervals on the circumference so as to be parallel to the axial direction of the shank 2 on the front end surface 22a of the shank 2. (See FIG. 2 (a)). A collet holder body 41 is inserted into the needle 3, and the collet holder body 41 is attached to the shank 2.

The collet holder body 41 is formed of a bottomed cylindrical member having a flange 41a at the rear end, and the flange 41a has U-shaped notches 41b (figure 2 in FIG. b)) is formed.
That is, the needle 3 as a support member loosely supports the collet holder body 41 constituting the tool holding member 4 so as to be tiltable with respect to the shaft of the shank 2.

  Specifically, the collet holder body 41 and the shank 2 are integrated in the rotational direction (circumferential direction) when the needle 3 is inserted into the notch 41b formed in the flange 41a at the rear end of the collet holder body 41. So that the collet holder body 41 can be smoothly tilted with respect to the shank shaft in the radial direction (see FIG. 3B). Has been.

  A pin 43 is fixed to the collet holder body 41 so as to penetrate in the radial direction, and a spring receiver 44 for holding the return spring 8 is disposed on the pin 43. The rear end surface 41c of the collet holder body 41 is formed with a conical recess 41d for stably holding the ball 61.

  The shape of the notch 41b is not limited to the U-shaped notch 41b, and may be a long hole. In short, the collet holder body 41 in the rotational direction (circumferential direction) with the needle 3 inserted. And the shank 2 can be integrated and rotated smoothly, and the collet holder body 41 can be smoothly tilted in the radial direction (see FIG. 3B).

The collet holder 42 is attached to the inner peripheral portion of the collet holder body 41, and is formed with a long hole 42a through which a pin 43 for holding the collet holder 42 so as to be slidable in the axial direction.
And the tool T is inserted in the front-end | tip part of the collet holder 42, The collet nut N is screwed together and the tool T is fixed.
Further, a flange 42b is provided on the outer peripheral portion of the collet holder 42 and abuts on the front end face 41e of the collet holder body 41 to serve as a stopper (see FIG. 3A).

  The return spring 8 is held by a spring receiver 44 disposed in the collet holder body 41, and is disposed so as to press the collet holder 42 toward a workpiece (not shown) (front end side).

  The clutch spring 5 is held via a spacer 21 a disposed on the body 21. In addition, ten clutch springs 5 are provided so as to cover the ten needles 3 (see FIG. 2D), and the needle 3 is attached to the needle 3 via a spring spacer 51 (see FIG. 2C). The rear end surface 41 c of the loosely fitted collet holder body 41 is urged toward the front end surface 22 a of the shank 2.

  With this configuration, when a lateral load exceeding the urging force of the clutch spring 5 is applied while holding the collet holder body 41 so as to rotate integrally with the shank 2 using the urging force of the clutch spring 5, the collet holder The body 41 can be tilted (see FIG. 3B).

  The tilting biasing force adjusting means 6 includes a ball 61 that abuts on the collet holder body 41, a ball holder 62 that holds the ball 61, and a direction opposite to the biasing direction (rearward) of the clutch spring 5. A ball set spring 63 that urges (forward) and an adjustment screw 64 that guides the ball set spring 63 are provided.

The ball 61 is in contact with the collet holder body 41 so as to be accommodated in a recess 41d formed in the rear end surface 41c of the collet holder body 41.
The ball holder 62 has an enlarged diameter portion 62 a on the front side and a reduced diameter portion 62 b on the rear side, and is accommodated in the inner peripheral portion of the shank 2. A recess 62c for stably holding the ball 61 is formed on the front end surface of the enlarged diameter portion 62a. The ball 61 is formed between the recess 62c and the recess 41d formed on the rear end surface 41c of the collet holder body 41. It is held stably.

The adjusting screw 64 is screwed into the rear end side of the inner peripheral portion of the shank 2 so as to be able to advance and retract, and a ball set spring 63 is held by the adjusting screw 64. The ball holder 62 is configured to urge the ball holder 62 to the collet holder body 41 via the ball 61 by the ball set spring 63.
Therefore, the spring force (biasing force) of the ball set spring 63 increases when the adjustment screw 64 is screwed in the forward direction (the maximum spring force is F3), and decreases when the adjustment screw 64 is loosened in the backward direction (minimum). The spring force is F2.) In this way, the spring force of the ball set spring 63 can be adjusted from F2 to F3.

With this configuration, the urging force of the ball set spring 63 acts in the opposite direction to resist the urging force of the clutch spring 5.
For this reason, if the urging force of the clutch spring 5 is F1 in total, and the urging force of the ball set spring 63 is F2 to F3 (varies in the adjustment range), the relationship between them is F1> (F2 to F3). As a result, the apparent urging force of the clutch spring 5 can be adjusted in the range of (F1-F3) to (F1-F2).

  The urging force of the clutch spring 5 and the adjustment range thereof are appropriately set in consideration of the material and shape of the workpiece W, the state of occurrence of burrs, and the like.

  The operation of the deburring tool 1 according to the embodiment of the present invention configured as described above will be described mainly with reference to FIG. 3A and 3B are front sectional views for explaining the operation of the deburring tool according to the embodiment of the present invention. FIG. 3A shows a state in which the collet holder is most retracted in the axial direction, and FIG. The most tilted state is shown.

  Before the deburring process, as shown in FIG. 1, when the reduced diameter portion 23 of the shank 2 is mounted on a machining center (not shown) and a rotational force is applied to the shank 2, the shank 2 is disposed on the front end surface 22a. The rotational force is transmitted to the collet holder body 41 through the needle 3. And it is transmitted to the collet holder 42 and the tool T via the pin 43 from the collet holder body 41, and the tool T can be rotated.

At this time, before the deburring process, as shown in FIG. 1, the work pressing force does not act because the workpiece W and the tool T are not in contact with each other. For this reason, the collet holder 42 is located at the forward end, and the rear side of the elongated hole 42 a formed in the pin 43 and the collet holder body 41 is in contact.
Further, since the collet holder body 41 is biased by the front end face 22a of the shank 2, the tool T is held so as to match the shank axis.

On the other hand, at the time of deburring, the deburring process is performed while moving the deburring tool 1 along a workpiece shape trajectory set in advance by a spindle moving mechanism of a machining center (not shown).
At this time, as shown in FIG. 3A, since the workpiece W and the tool T come into contact with each other, the processing pressing force Fv acts on the tool T in the direction in which the collet holder 42 is retracted. The processing pressing force Fv is in a state (so-called floating state) balanced with the spring reaction force of the return spring 8, and the deburring process is performed while maintaining the floating state.

  3A shows a state in which the collet holder 42 is most retracted in the axial direction, and the flange 42b formed on the outer peripheral portion of the collet holder 42 and the front end face 41e of the collet holder body 41 are in contact with each other. Since it is in a contact state, it does not indicate the state at the time of deburring.

  As a result of this operation, the return spring 8 absorbs fluctuations in the machining pressure caused by the variation in the size of the burrs formed on the workpiece W (non-uniform state), and the machining pressure Fv is appropriately controlled. Therefore, a good finished surface can be obtained.

  Further, at the time of deburring, as shown in FIG. 3B, when a lateral load (a load in a direction intersecting the axial direction, a processing pressing force Fh) is applied to the tool T, the collet holder body 41 is Of the ten clutch springs 5 biased to the front end surface 22a of the shank 2, a force to be contracted acts on the upper clutch spring 5 in the figure, and the upper and lower clutch springs 5 are stretched. Force to act acts.

At this time, since the rear end surface 41c of the collet holder body 41 is held in contact with the front end surface 22a of the shank 2, only the upper clutch spring 5 in the drawing is contracted, and the collet holder body 41 moves forward, and the collet holder The body 41 tilts by θ.
Then, the lateral processing pressing force Fh accompanying this tilting is in a state (so-called floating state) balanced with the spring reaction force of the clutch spring 5, and the deburring process proceeds while the floating state is maintained.
As a result of this operation, the clutch spring 5 absorbs fluctuations in the horizontal processing pressing force Fh caused by variations in the size of the burrs formed on the workpiece W (non-uniform state), and the horizontal processing pressing is performed. Since the pressure Fh is also appropriately controlled, a better finished surface can be obtained.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications.
For example, in the present embodiment, coil springs are employed as the clutch spring 5, the ball set spring 63, and the return spring 8. However, the present invention is not limited to this, and various biasing means such as a disc spring and a rubber spring are used. The quantity and the arrangement are also appropriately set according to the specifications of the deburring tool.

It is front sectional drawing for demonstrating the structure of the deburring tool which concerns on embodiment of this invention. It is a cross-sectional view of FIG. 1, (a) is AA cross section, (b) is BB cross section, (c) is CC cross section, (d) shows DD cross section. It is front sectional drawing for demonstrating operation | movement of the deburring tool which concerns on embodiment of this invention, (a) shows the state which the collet holder retracted most in the axial direction, (b), the collet holder tilted most. Indicates the state.

Explanation of symbols

1 Deburring tool 2 Shank 3 Needle (support member)
4 Tool holding member (Collet holder, Collet holder body)
5 Clutch spring (spring, tilting biasing means)
6 Tilt biasing force adjusting means 8 Return spring (pressing force adjusting biasing means)
41 Collet holder body (tool holding member)
42 Collet holder (tool holding member)
43 pin 51 spring spacer 61 ball (tilting biasing force adjusting means)
62 Ball holder (tilting biasing force adjusting means)
63 Ball set spring (spring, tilting force adjusting means)
64 Adjustment screw (Tilt biasing force adjusting means)
T tool W work

Claims (4)

A shank that is detachably attached to the spindle of the machine tool;
A tool holding member attached to the shank through a support member so as to rotate integrally with the shank, and a deburring tool,
The support member loosely supports the tool holding member so as to be tiltable with respect to the shank shaft,
A tilting biasing means for biasing the tool holding member to the shank;
Deburring tool characterized by A tilt biasing force adjusting means for biasing the tool holding member in a direction opposite to the biasing direction of the tilt biasing means to adjust the biasing force of the tilt biasing means;
The deburring tool according to claim 1.   The tilt biasing force adjusting means includes a ball that abuts on the tool holding member, a ball holder that holds the ball, and a spring that biases the ball holder in the opposite direction. The deburring tool according to claim 2. The tool holding member is
A collet holder for holding the tool;
A collet holder body that holds the collet holder and rotates integrally with the shank;
A pressing force adjustment biasing means for biasing the collet holder toward the tip end side in the shank axial direction to adjust a processing pressing force;
The deburring tool according to any one of claims 1 to 3, wherein the deburring tool is provided.

Images