JPH07106490B2 - Cutting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device of the type which automatically reciprocates a cutting tool in a direction transverse to the axis of rotation.

[0002]

2. Description of the Related Art A conventional cutting method is to manually insert a blade into a hole of a workpiece, for example, by manually rotating one of the workpiece and the blade holder that are arranged in series, and then
The peripheral surface of the hole is cut by a blade while the workpiece or holder is moved in a direction that intersects at right angles to the axis.

After the cutting is completed, the workpiece or the holder is moved back, and then the holder is removed from the hole.

[0004]

When the cutting method as described above is adopted, since the blade is manually moved forward and backward, it is troublesome, inefficient, and the production capacity is significantly lowered. It was

Therefore, an object of the present invention is to automatically return the blade holder when the blade holder reaches a forward end point which can be freely set during operation, and further, the cutting feed speed is changed depending on the processing material. It can be adjusted.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a base body which is connected to a spindle at an end thereof and rotates together with the base body, and is provided rotatably on an axis line in the base body and has inertia. A rotating shaft having resistance applying means for eliminating force, a second gear engaged with the outer peripheral first gear of the rotating shaft and supported in the base body, and equally distributed to one end of the second gear and radially. A plurality of protrusions provided, a cylindrical body provided outside the tip of the base body so that the base body can rotate freely, and engaging with the bearing side of the spindle when the base body is connected to the spindle. A locking device provided to stop the rotation of the tubular body, a plurality of kick pins provided to the outer periphery of the tubular body by an operation from the outside, and to engage with the protrusion when the immersion is stopped, Fix it at the eccentric position of the tip surface of the rotating shaft. The rotation of the third internal gear, the rear first internal gear and the front second internal gear having different numbers of teeth partially meshed with the third gear, and the rotation of the first internal gear are limited. The torque limiter device provided as described above, the fourth gear with operating means provided so that the engagement with the second internal gear can be released by an external operation, and the pinion that rotates together with the fourth gear. A blade holder provided on the tip of the base body so as to be slidable in a direction intersecting at right angles to the axis of the base body, a fixed stopper provided on the front end surface of the base body, and the blade holder. A cutting device including a moving stopper provided so that at least one of the fixed stoppers can be moved and adjusted at a position facing the fixed stopper.

[0007]

Function: The end of the substrate is connected to the spindle.

At this time, since the locking device is locked to the bearing side of the spindle, the rotation of the cylindrical body is prevented.

When the spindle is rotated in the normal direction, the base body also rotates in the same direction.

At this time, the second gear is intermittently rotated each time the recessed kick pin and the projection are engaged, so that the rotation is transmitted from the second gear to the first gear to the rotary shaft.

Then, the torque limiter device prevents the first internal gear from rotating, and the third gear rotates with the first internal gear as a reference.

As a result, the second internal gear having a different number of teeth is decelerated and rotated (differential device) by the third gear, so that the pinion is driven from the second internal gear to the fourth gear.

When the pinion is driven, the blade holder moves forward through the rack, and when one of the moving stoppers of the blade holder comes into contact with the fixed stopper during the forward movement, the blade holder stops moving forward.

Then, since the rotation of the pinion is stopped, the rotation of the second internal gear is also stopped.

On the other hand, since the third gear continues to rotate with the second internal gear as a reference, the first internal gear rotates and the torque limiter device repeats disconnection and connection. This state continues until the forward rotation of the spindle is stopped.

Next, when the spindle is reversely rotated, the first
The internal gear blocks rotation, and the second internal gear rotates, so that the blade holder moves back.

When the other moving stopper of the blade holder comes into contact with the fixed stopper, the torque limiter device is turned off and repeated as described above, and the blade holder returns to its original position. The blade holder automatically reciprocates only by rotating.

If the number of immersive kick pins is increased,
The blade holder slides faster.

Further, if all the kick pins are projected so that the engagement relationship between the kick pins and the protrusions is lost, the blade holder will not slide.

Further, when the engagement of the fourth gear with the second internal gear is released by an external operation, the blade holder can be manually slid.

The fixed position of one of the movement stoppers with respect to the blade holder is adjusted to perform forward and backward positioning of the blade holder.

Further, the resistance applying means applies a brake to the rotating shaft which rotates intermittently to stop the rotation due to the inertial force, and maintains the normal engagement relationship between the kick pin and the protrusion.

[0023]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, reference numeral 1 is a base for connecting the spindle A to the end side.

In the illustrated method, the shank portion 2 is inserted into the tapered hole a of the spindle A, but the shank portion 2 may be connected by using a method such as a clamp.

On the outer side of the tip of the base body 1, there is provided a cylindrical body 4 on which the base body 1 freely rotates via a bearing 3.

Further, the tubular body 4 is provided with a locking device 5 which engages with the bearing side of the spindle A and stops the rotation of the tubular body 4 when the base body 1 is connected to the spindle A.

In the illustrated case, the locking device 5 is a cylindrical body 4.
The projecting member 6 projecting from the outer peripheral portion is provided with a recessed hole 7 which is directed downward from the upper surface, and the elevating pin 8 inserted into the recessed hole 7 is provided with an upward projecting output by a spring 9 to form a tapered hole a. When the shank portion 2 is inserted into the shaft 10, the tip of the elevating pin 8 fits into the groove 12 of the block 11 fixed to the tip end surface of the bearing 10 of the spindle A, and the elevating pin 8 is compressed while compressing the spring 9. Is pushed down.

As shown in the drawing, when the shank portion 2 is connected to the spindle A, the anti-rotation mechanism 1 which projects from the elevating pin 8 and includes a hole and a pin fitted in this hole.
When the key 14 with a key 3 is pushed back and disengaged from the key groove 15 on the outer peripheral surface of the base body 1 and the base body 1 is removed from the spindle A, the key groove 15 is automatically moved as the lifting pin 8 moves up.
Since the key 14 is fitted in the lock member 5, the rotation of the tubular body 6 with respect to the base body 1 is stopped, and the locking device 5 is stopped at a fixed position.

Further, on the shaft center line in the base body 1, the rotating shaft 1 is rotatable and has a resistance applying means for eliminating inertial force.
6 is incorporated.

The rotating shaft 16 is the hollow chamber 1 in the base body 1.
7, a bearing 18 is supported by a bearing 18, and a resistance force imparting means for the rotating shaft 16 is constructed by pressing the tip end surface of the pressing member 20 against the outer peripheral surface of the rotating shaft 16 via a spring 19 to generate an inertial force by a frictional force. The rotation of the rotary shaft 16 is stopped.

Further, the first gear 21 provided on the outer circumference of the rotary shaft 16 has the second gear supported on the outer circumference of the base body 1.
The gear 22 meshes.

Further, on one end surface of the second gear 22, radial projections 23 which are evenly distributed are provided.

The second gear 22 is rotatably supported in a through window 24 through which the hollow chamber 17 and the outer peripheral surface of the base 1 communicate with each other, and a projection 23 extending in the outer peripheral direction of the base 1 is projected outside the base 1. .

Further, around the cylindrical body 4, there is provided a kick pin 25 which is retracted by an operation from the outside and engages with the projection 23 to rotate the second gear 22 when the immersion is stopped.

As shown in FIGS. 1 to 3, the kick pin 25 is provided with a large number of through holes 26 which communicate with the inner circumferential surface from the outer circumferential surface of the cylindrical body 4 at regular intervals. While inserting the kick pin 25, one projection 27 projecting from the peripheral surface of the through hole 26 is engaged with either one of the two concave portions 28 provided at the front and rear on the peripheral axis of the kick pin 26. The tip of a tool (such as a screwdriver) fitted in the notch 29 of the tubular body 4 is moved to the outer circumference of the kick pin 25 so that the kick pin 25 is kept in the retracted and projected state and a part of the outer circumference of each kick pin 25 is exposed. Groove 3 provided on the surface
It is locked at 0, and the kick pin 25 appears and disappears by operating the tool.

In addition, the tip end surface of the rotary shaft 16 is eccentric to the third position.
While fixing the gear 31, the third gear 31 has a number of teeth different from that of the first internal gear 32 that freely rotates at a fixed position, for example, the number of teeth of the first internal gear 32 is smaller than that of the first internal gear 32. 1
A large number of second internal gears 33 are meshed with each other (the second internal gear 33 is located on the tip side of the base body 1).

Reference numeral 34 is a torque limiter device for limiting the rotation of the first internal gear 32.

As shown in FIGS. 1 and 3, the torque limiter device 34 has groove portions 35 provided at equal intervals on the outer peripheral surface of the first internal gear 32, and a part of the peripheral surface of each groove portion 35. The ball 36 in which is inserted and the spring 37 gives a protrusion output, and the ball 36 is pushed into the groove portion 35.
The slide pin 38 is formed by abutting a tapered portion (or a sloped surface) on the tip of the ball 36, and when a large overload is applied, the slide pin 38 is pushed out to allow the ball 36 to escape from the groove portion 35 and the first internal gear. When only the ball 32 is allowed to rotate and the escaped ball 36 and the groove portion 35 are aligned with each other, the ball 3 is inserted into the groove portion 35 by the applied protruding output of the slide pin 38.
6 is pushed in.

Further, the second internal gear 33 is provided with a fourth gear 39 which can be meshed with and released from the second internal gear 33 by an external operation.

In the above operation, as shown in FIGS. 1, 4 and 5, a rectangular hollow chamber 40 is provided at the tip of the base body 1, and the hollow chamber 40 is provided with balls 42 and grooves 45. The rectangular slide plate 41 that ensures smooth sliding is incorporated, and the tip of the screw shaft 44 screwed into the screw hole 43 communicating with the hollow chamber 40 from the outer peripheral surface of the base 1 is freely rotated at a fixed position at the end of the slide plate 41. As described above, the fourth gear 39 is supported by the slide plate 41 so that the slide plate 41 is slid and engaged, and the engagement is released.

Further, on the tip end surface of the base body 1, a fitting guide portion 4 of a ridge and a groove is formed in a direction transverse to the axis of the base body 1 at right angles.
A blade holder 47 guided by 6 is provided.

The attachment of the blade to the blade holder 47 is
In the case shown in the drawing, the fixing screw 49 is screwed in after the distal end side of a blade (not shown) is fitted into the hole 48.

A rack 50 is provided on the blade holder 47 along the sliding direction of the blade holder 47.
A pinion 51 provided coaxially with the fourth gear 39 meshes with 0.

The through hole 52 of the pinion shaft is an elongated hole parallel to the rack 50.

Reference numeral 53 designates a fixed stopper provided on the tip end surface of the base 1, 54 designates one side surface parallel to the sliding direction of the blade holder 47, and at least one of which is provided facing the fixed stopper 53 is movable for position adjustment. It is a stopper.

In the illustrated case, the moving stopper 54 is engaged with the blade holder 47 in the backward direction by a rail portion 55 so that it can travel, and can be fixed at a predetermined position by screwing a screw 56. There is.

With the above structure, the base body 1 rotates in the same direction as the spindle A rotates in the normal direction. Then,
Collision engagement between the kick pin 25 and the projection 23, in which the cylindrical body 4 that does not rotate is sunk, the second gear 22 is intermittently rotated each time, so that the second gear 22 moves from the second gear 22 to the rotary shaft 16 toward the rotary shaft 16. Is transmitted.

Third rotating with rotation of rotating shaft 16
The gear 31 and the torque limiter device 34 prevent the first internal gear 32 from rotating, and the third gear 31 rotates with the first internal gear 32 as a reference. The internal gear 33 decelerates and rotates. Therefore, the pinion 51 is driven from the second internal gear 33 to the fourth gear 39.

The rack 50 is driven by the drive of the pinion 51.
The blade holder 47 moves forward via the, and when the moving stopper 54 on one side contacts the fixed stopper 53 during the forward movement, the movement of the blade holder 47 stops.

Needless to say, cutting is performed by a blade (not shown) as the blade holder 47 moves forward.

Incidentally, the cutting includes machining of a tapered surface by a combined feed of the movement of the substrate 1 in the Z direction and the movement of the blade, in addition to the annular groove and step processing on the entire surface around the hole.

As the blade holder 47 stops moving forward, the rotation of the pinion 51 stops, so that the second internal gear 33 also stops.

At this time, since the third gear 31 continues to rotate with the second internal gear 33 as a reference, the first internal gear 3
Since 2 rotates and the torque limiter device 34 repeats disconnection and connection, the forward movement stop state of the blade holder 47 is maintained regardless of the forward rotation of the base body 1.

Next, when the spindle A is rotated in the reverse direction, the first
Since the internal gear 32 is prevented from rotating and the second internal gear 33 rotates, the blade holder 47 moves back.

When the other moving stopper 54 comes into contact with the fixed stopper 53, the torque limiter device 34 is turned off and on again as described above, so that the blade holder 47 is maintained in the backward movement stop state. .

When the number of the kick pins 25 immersed is increased, the blade holder 47 slides faster.

If all the kick pins 25 are projected so that the kick pins 25 and the projections 23 are not engaged with each other, the rotary shaft 16 will not rotate. That is, since the blade holder 47 is stationary, boring can be performed by moving the base body 1 in the Z direction.

Further, while the screw shaft 44 is rotated by a driver or the like, the slide plate 41 is slid to move the second shaft.
When the engagement between the internal gear 33 and the fourth gear 39 is released, the manual slide operation of the blade holder 47 becomes easy.

[0060]

Since the cutting device of the present invention is configured as described above, the forward and backward stop of the blade holder can be automatically performed only by the forward and reverse rotation operation.

Further, if the number of immersive kick pins is increased,
If the feed speed of the blade holder is fast and the number of kick pins immersed is small, the feed speed of the blade holder can be adjusted slower, and if all kick pins are projected, the blade holder can be stopped and machining can be performed. .

Further, since the engagement of the fourth gear with the second internal gear is released by an operation from the outside, it is easy to manually move the blade holder to adjust the stop position of the blade.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an embodiment of the present invention.

[Figure 2] Bottom view of the same

FIG. 3 is an enlarged cross-sectional plan view showing a kick pin portion.

FIG. 4 is a cross-sectional plan view showing a moving portion of a fourth gear.

FIG. 5 is a cross-sectional plan view in which engagement is released.

[Explanation of symbols]

 A Spindle a Tapered hole 1 Base 2 Shank part 3 Bearing 4 Cylindrical body 5 Locking device 6 Projection member 7 Recessed hole 8 Lifting pin 9 Spring 10 Bearing 11 Block 12 Groove 13 Locking mechanism 14 Key 15 Key groove 16 Rotating shaft 17 Hollow Chamber 18 Bearing 19 Spring 20 Pressing Member 21 First Gear 22 Second Gear 23 Protrusion 24 Through Window 25 Kick Pin 26 Through Hole 27 Protrusion 28 Recess 29 Cutout 30 Groove 31 Third Gear 32 First Internal Gear 33 2 Internal gear 34 Torque limiter device 35 Groove 36 Ball 37 Spring 38 Slide pin 39 Fourth gear 40 Hollow chamber 41 Slide plate 42 Ball 43 Screw hole 44 Screw shaft 45 Groove 46 Guide part 47 Tool holder 48 Hole 49 Fixing screw 50 Rack 51 Pinion 52 Through hole 53 Fixed stopper 54 Transfer Stopper

Claims (1)

[Claims] 1. A base body which is connected to a spindle at an end thereof and rotates together with the base body, and a rotary shaft which is rotatably provided on an axis line in the base body and has a resistance force applying means for eliminating inertial force.
A second gear that meshes with the outer peripheral first gear of the rotary shaft and is supported in the base body, a plurality of protrusions radially distributed evenly on one end of the second gear, and the outside of the tip end portion of the base body. A tubular body provided so that the base body can rotate freely;
A locking device that is provided to engage the bearing side of the spindle to stop the rotation of the tubular body when the base body is connected to the spindle, and is retracted from the outer periphery of the tubular body by an external operation. In addition, a plurality of kick pins provided so as to engage with the protrusions when the immersion is stopped, a third gear fixed to the tip surface eccentric position of the rotary shaft, and a number of teeth partially meshed with the third gear. Different rear first internal gears and front second internal gears, a torque limiter device provided so as to limit the rotation of the first internal gears, and the second internal gears that are externally operated. A fourth gear provided with an operating means so that the engagement with the
A rack is engaged with a pinion that rotates together with the fourth gear, and a blade holder is provided at the tip of the base body so as to be slidable in a direction intersecting at right angles to the axis of the base body. A cutting device comprising: a fixed stopper; and a movable stopper, at least one of which is movable and adjustable at a position facing the fixed stopper of the cutter holder.