JP2558054B2 - Annular cutter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annular cutter mounted on a drilling device used for drilling a relatively deep hole in a hard material such as a steel plate, and more specifically, it can be easily attached to and detached from the drilling device. At the same time, the present invention relates to an annular cutter that can eliminate the inconvenience of incorrectly mounting an unsuitable annular cutter on a punching device.

[0002]

BACKGROUND OF THE INVENTION As is known, punching devices for hard materials are
Generally, the structure is such that a perforation body (annular cutter) having a perforation blade at the lower end is rotated and the perforation work is performed while feeding at a constant speed. In this device, since it is necessary to replace the annular cutter according to the diameter of the hole to be drilled in the hard material during the drilling work, various annular cutter attaching / detaching devices have been conventionally used so that the annular cutter can be easily replaced. Has been proposed. Such annular cutter attachment / detachment devices range from simple attachment / detachment devices that fix the annular cutter to the arbor side using screws, to relatively complex mechanisms that use locking members such as balls. It is diverse. A typical essential structure of such an annular cutter attaching / detaching device will be described with reference to the drawings. FIG. 8 is a side view of the attaching / detaching device, and FIG. 9 is an enlarged view of an essential part of the same device. 62-
No. 74515). A detailed description of the configuration other than the attaching / detaching device in the figure is omitted here.

In FIG. 8, reference numeral 51 is an arbor, and this arbor 51 is mounted on a punching machine (not shown) so that rotation and feed necessary for punching work are transmitted from the punching machine. In FIG. 9, a cylindrical rotation transmission body 52 is attached to the arbor 51 via a key 53 so as not to rotate relative to each other. An end of the rotation transmission body 52 has a hole for accommodating an annular cutter attachment ball 57. A plurality of 52a penetrates toward the center.

On the inner peripheral surface of the rotation transmitting body 52, a plurality of rotation transmitting engaging elements 52b for transmitting a rotational force to an annular cutter 56, which will be described later, are provided in a protruding manner. Further, around the rotation transmitting body 52, an pushing operation sleeve 54 for pushing out the mounting ball 57 accommodated in the accommodation hole 52a toward the center of the rotation transmitting body 52 is slidable in the axial direction. A spring 55 for urging the pushing operation sleeve 54 to the left in the drawing is arranged between the pushing operation sleeve 54 and the rotation transmitting body 52. The push-out operation sleeve 54 is supported by a retaining ring 58 so as not to fall off the rotation transmitting body 52.

On the other hand, the annular cutter 56 is formed in a cylindrical shape with a large number of blades (not shown) planted at the lower end (on the left side in the drawing) and the lower end is opened. An insertion portion 56a that can be inserted into the lower end opening of the rotation transmitting body 52 is formed. And the insertion portion 56a
A protrusion 56b capable of engaging with a rotation transmitting engaging element 52b provided on the rotation transmitting body 52 is formed at the upper end of the mounting portion, and the mounting ball is provided around the middle portion of the insertion portion 56a. An insertion annular groove 56c of 57 is formed.

At the center of the annular cutter 56, a center pin 60 for piercing and positioning is disposed so as to be able to penetrate therethrough. The center pin 60 is provided with an engaging groove 61 formed on the center pin and a locking ball 62. And spring 6
It is held on the inner peripheral surface of the arbor 51 by means of 3. The center pin 60 is connected to the spring 6 via the ball 62.
3, the sealing member 64 provided on the center pin 60 is in contact with the shoulder of the annular cutter to prevent the cutting oil from flowing downward. However, during the drilling operation, the center pin 60 comes into contact with the hard material to be drilled, and the center pin 60 is pushed into the hole of the arbor 51 against the urging force of the spring 63. 5
The cutting oil, which is separated from the shoulder portion of 6 and is injected into the arbor hole, is supplied to the cutting edge of the annular cutter.

In order to attach the annular cutter 56 to the rotation transmitting body 52 in the above apparatus, the pushing operation sleeve 54 is moved rightward in the drawing against the urging force of the spring 55, and the insertion portion of the annular cutter 56 is inserted. 56a is the rotation transmitting body 52
To engage the rotation transmitting engagement element 52b with the projection 56b. At this time, since the push-out portion of the push-out sleeve 54 is displaced from the position facing the attachment ball 57, the ball 57 can be moved outward, and the insertion action of the insertion portion 56a of the annular cutter has no effect. It has no effect. When the pushing operation sleeve 54 is released in a state where the annular cutter is completely attached to the rotation transmitting body, the pushing operation sleeve 54 is moved leftward in the drawing by the urging force of the spring 55, and the attachment ball 57 is inserted. Part 5
6a into the annular groove 56c. In this way, the annular cutter 56 is integrally and detachably attached to the rotation transmitting body 52.

[0008]

In the above annular cutter attaching / detaching device, the annular cutter is replaced according to the diameter of the hole to be drilled in the hard material during the drilling work, or a suitable cutting edge suitable for the quality of the material to be drilled is used. It is necessary to replace it with an annular cutter that has However, in the above device, the rotation transmitting body 52
Since the structure is such that any annular cutter can be attached as long as the lower end opening and the outer diameter of the insertion part of the annular cutter and the position of the insertion annular groove are aligned, sometimes the driving capability of the punching device and the Occasionally, an annular cutter will be installed that is not compatible with the drilling material. And if you continue drilling work without noticing this, unexpected cutting resistance occurs during work, which may damage the drive mechanism on the drilling machine side or damage the cutting edge of the annular cutter. The problem of occurs.

In this case, if the cutting edge on the annular cutter side is damaged, it can be dealt with immediately by replacing the annular cutter, but if the driving mechanism on the punching device side is damaged, the work is interrupted for a long time. It is necessary to do so, and there is a risk that the production plan will go wrong. Further, if the annular cutter is not compatible with the material to be drilled, even if a hole is drilled, burrs may appear around the hole and the accuracy may be reduced.

Therefore, the present invention provides a novel annular cutter which can select only an annular cutter suitable for the punching device from various types of annular cutters and can be attached to the punching device, and which is easy to attach and detach the annular cutter. The proposal is to solve the above problems.

[0011]

Therefore, according to the present invention, when the cutter is inserted into the arbor mounted on the punching device, the arbor is in a semi-protruding state on the inner side of the arbor so that it can be immersed by operating the sleeve. An annular cutter detachably attached to the arbor by a locking member that is provided, wherein the annular cutter has an insertion portion into the arbor,
On the outer surface of the insertion portion, a locking member passage concave portion that is provided so as to semi-project toward the inside on the arbor side and that allows passage of the locking member, and an engagement concave portion that engages with the locking member are formed in a continuous manner. It is an annular cutter characterized by being formed, and is used as a means for solving the problem.

[0012]

[Action]

[Mounting Operation of Annular Cutter 6] When the annular cutter 6 is mounted, a part 7b of the locking member 7 is in a state of protruding inside the hole 1a. An annular cutter having a locking member passing portion that allows the locking member 7 to pass is inserted into the hole 1a. When the insertion portion 9 of the annular cutter 6 is fitted into the hole 1a while pushing the support member 2, the locking member 7 falls into the engagement portion 9b formed by being connected. Then, the sleeve 4 returns to the position shown in FIG. 5 by the urging force of the return spring 5, and the locking member 7 is firmly locked to the engaging portion 9b by the second control surface 4e.

[Detachment Operation of Annular Cutter 6] When the sleeve 4 is rotated from the state where the annular cutter 6 is attached, the pressing of the sleeve 4 against the locking member 7 is lost, so that the locking member 7 is controlled by the first control of the sleeve 4. The surface 4b is ready to escape. As a result, the annular cutter 6
And pulling out downwards, the locking member passing portion 9 of the annular cutter 6
Since a is pulled out from the hole 1a while pushing the locking member 7 into the first control surface 4b, the annular cutter 6 can be easily removed from the hole 1a of the arbor 1.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of an annular cutter attaching / detaching device and an annular cutter according to an embodiment of the present invention, and FIG. 3 is a sectional view taken along the line C-C, FIG. 3 is a sectional view taken along the line AA in FIG. 1, and FIG. 4 is a sectional view taken along the line BB in FIG. In FIG. 1, reference numeral 1 denotes an arbor, and this arbor 1 is mounted on a punching machine (not shown) so that rotation and feed necessary for drilling work are transmitted from the punching machine. A hole 1a is formed in the central portion of the arbor 1 from the lower end side (the left side in the drawing) to a predetermined depth, so that cutting oil can be supplied from a channel (not shown) to the hole 1a. Has become.

A seal member 12 is attached to the inside of the hole 1a by a locking ring 10, and a flow path opening / closing valve body 11 is attached to the seal member 12. The flow path opening / closing valve body 11 is pressed toward the seal member 12 (to the left in the drawing) by the spring 13 arranged in the hole 1a of the arbor 1, and these cooperate to form a valve. ing. FIG. 1 shows a state in which the flow path is closed by the valve body 11 and the seal member 12, and the cutting oil supplied into the hole 1a does not flow downward. When the arbor 1 moves toward the material to be pierced during the piercing operation in which the annular cutter is attached to the arbor (details will be described later), the center pin 8 of the annular cutter 6 causes the valve body 11 to work. The center pin 8 pushes up the valve element 11 against the urging force of the spring 13 to open the flow path and allow the cutting oil to flow downward.

On the lower end side of the arbor 1, there is formed a receiving hole 7a for a locking member for mounting an annular cutter (a ball in this embodiment, hereinafter referred to as a locking member) 7 toward the center of the hole 1a. The locking member 7 is arranged in the accommodation hole 7a. A plurality of the accommodation holes 7a are provided in the circumferential direction of the hole 1a. On the other hand, corresponding to this locking member 7, the hole 1
A support member 2 when the locking member 7 protrudes inside the hole 1a is arranged in a. The support member 2 has a recess 2a for receiving the locking member 7 in a semi-projected state, and is urged downward by a spring 3 arranged between the support member 2 and the locking ring 10. Further, in this support member 2, the insertion portion of the annular cutter has a hole 1a of the arbor 1.
When it enters the inside, it is pushed upward from the state shown in FIG. 1 against the urging force of the spring 3 by the insertion portion of the annular cutter, so that it does not interfere with the insertion of the annular cutter.

On the outer peripheral surface of the lower end of the arbor 1 on which the locking member 7 is arranged, a step portion 1b having a smaller outer diameter is formed, and a sleeve 4 for locking an annular cutter is fitted on the step portion 1b. Are combined. The sleeve 4 has a ring shape as shown in FIG. 2, and a return spring 5 is provided on the entire circumference on one side thereof.
Is formed with a concave portion 4a for accommodating therein. Also sleeve 4
The inner peripheral surface of the first control surface 4b for accommodating the locking member 7 and the second control surface 4 for pushing the locking member 7 in the centripetal direction.
e is formed. The first control surface 4b has a function of housing the locking member 7 in the first control surface 4b. As shown in FIG. 3, the depth 4c of the first control surface 4b is such that the locking member 7 is housed in the first control surface 4b.
A part 7b of the locking member 7 is formed to have a depth so as to project inside the hole 1a.

A substantially C-shaped return spring 5 is housed in the recess 4a of the sleeve 4 as shown in FIG.
One end of the return spring 5 is fixed to the arbor side,
The other end is fixed to the sleeve 4 side. In the figure, 5a is a side plate, and 5b is a locking ring for attaching the side plate 5a to the arbor. The sleeve 4 is always fitted in the step portion 1b of the arbor 1 by the return spring 5 in the direction of arrow A in FIG.
The urging is maintained in a state of being pushed out into a). Therefore, in the state shown in FIG. 3 (that is, when the annular cutter is not attached to the arbor), from the first control surface portion 4b of the sleeve 4 which is biased in the direction of arrow A in FIG. The locking member 7 is about to be pushed out into the hole 1a, but the locking member 7 is placed in the hole 1a.
Due to this, a part 7b of the locking member 7 is in a state of semi-projecting into the hole 1a. As a result, only the annular cutter having the locking member passing portion that allows the locking member 7 to pass can be mounted on the annular cutter attaching / detaching device,
As a result, it is possible to prevent erroneous mounting of the annular cutter. As described above, the sleeve 4 and the locking member 7 and the like constitute a locking mechanism that connects the annular cutter to the arbor.

Next, the structure of the annular cutter to be attached to the above-mentioned annular cutter attaching / detaching device will be described with reference to FIG. In FIG. 6, the annular cutter 6 is formed in a cylindrical shape in which a large number of blades (not shown) are planted at the lower end and the lower end is opened. The arbor 1 is inserted in the insertion portion 9 of the annular cutter 6.
Locking member passage portion 9 that allows passage of a portion 7b (see FIG. 3) of the locking member 7 that is in a protruding state into the hole 1a of the
a is formed. The locking member passing portion 9a has a shape in which a part of the insertion portion is chamfered as shown in FIG. 6A, a shape in which a part of the tip is made small in diameter as shown in FIG. 6B, or Although not shown, various members such as a member having a recess formed in the locking member 7 can be used. Further, an engaging portion 9b that engages with the locking member 7 is formed in an intermediate portion of the insertion portion 9 so as to be connected to the engaging portion 9b. Further, a center pin 8 for drilling positioning is provided at the center of the annular cutter 6.
(See FIG. 1) is arranged so as to be freely inserted and removed, and the center pin 8 has a head portion 8a (FIG.
(Refer to FIG. 4), the downward drop from the annular cutter 6 is prevented. The center pin 8 can be removed from the annular cutter 6 and replaced if necessary.

The operation of the annular cutter attaching / detaching device having the above structure will be described. [Attachment Operation of Annular Cutter 6] When attaching the annular cutter 6, a part 7b of the locking member 7 is in a state of protruding inside the hole 1a. Therefore, an annular cutter having a locking member passage portion 9a that allows the locking member 7 to pass is inserted into the hole 1a. When the insertion portion 9 of the annular cutter 6 is fitted into the hole 1a while pushing the support member 2,
The locking member 7 falls into the engaging portion 9b formed by being connected. Then, the sleeve 4 returns to the position shown in FIG. 5 by the urging force of the return spring 5, and the locking member 7 is firmly locked to the engaging portion 9b by the second control surface 4e. In this way, the annular cutter 6 is attached to the arbor 1 as shown in FIG.

As described above, according to the present invention, since only the annular cutter suitable for the arbor 1 of each punching device can be selected from a large number of annular cutters and can be mounted by one-touch operation, the incorrect mounting of the annular cutter can be prevented. can do. Further, the required rotation and feed are transmitted from the punch to the annular cutter 6 via the arbor 1. During the drilling work,
The center pin 8 is pushed upward, and the seal member 12
The cutting oil is supplied to the cutting edge of the annular cutter by separating the valve body 11 from the valve.

[Detachment Operation of Annular Cutter 6] When the sleeve 4 is rotated from the state in which the annular cutter 6 is attached (FIGS. 5 and 7) to the state shown in FIG.
Since the first control surface 4b and the first control surface 4b coincide with each other, the pressing of the sleeve 4 against the locking member 7 by the second control surface 4e is eliminated, so that the locking member 7 escapes into the first control surface 4b of the sleeve 4 and moves the annular cutter 6 downward. Can be pulled out. At this time, since the annular cutter 6 is pulled out from the hole 1a and locked in the recess 2a of the support member 2 with the locking member passage portion 9a of the annular cutter 6 partially projecting the locking member 7a, the locking member 7 is locked. The member 7 is held by the support member 2 again in the initial state in which a part 7b thereof projects into the hole 1a. On the other hand, since the locking member 7 of the sleeve 4 is fitted into the first control surface 4b, the sleeve 4 is held against the resilient force of the spring.

The above embodiment is one of the embodiments of the present invention, and the insertion portion of the annular cutter is formed into a polygonal shape, or the positioning irregularities are formed on the arbor side and the annular cutter side. Various other forms having a selection function can be adopted. Furthermore, the number of locking members to be attached to the arbor side can be set appropriately, and by doing this, by matching the shapes on the annular cutter side, it is possible to carry out a more detailed selection work of the annular cutter. Further, when the locking member passing portion 9a has a shape in which a part of the insertion portion is chamfered as shown in FIG. 6 (a), this annular cutter is used as a conventional screw type annular cutter attaching / detaching device. Can also be applied. Etc. can be implemented in various other forms without departing from the spirit or main characteristics of the present invention. Therefore, the above embodiments are merely examples in all respects, and should not be limitedly interpreted.

[0024]

As described in detail above, according to the present invention,
An annular cutter that is always suitable for the driving capacity of the punching device and the material to be punched can be selected from many annular cutters, and it is possible to prevent problems caused by erroneous mounting of an inappropriate annular cutter on the punching device. it can. As a result, it is possible to reliably prevent problems such as damage to the driving mechanism on the punching device side and damage to the blade edge of the annular cutter. It has excellent effects such as.

[Brief description of drawings]

FIG. 1 is a side sectional view of an annular cutter attaching / detaching device and an annular cutter according to an embodiment of the present invention.

FIG. 2 is a side sectional view and a front sectional view of a sleeve.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a sectional view taken along line BB in FIG.

FIG. 5 is an enlarged cross-sectional view of a locked portion with the annular cutter attached to the arbor.

FIG. 6 is a side view and a plan view of two different annular cutters used in the present invention.

FIG. 7 is a side sectional view showing a state in which the annular cutter is attached to the arbor.

FIG. 8 is a side sectional view of a conventional annular cutter attaching / detaching device.

FIG. 9 is an enlarged sectional view of a main part of a conventional annular cutter attaching / detaching device.

[Explanation of symbols]

 1 Arbor 1a Hole 2 Supporting Member 3 Spring 4 Sleeve 5 Return Spring 6 Annular Cutter 7 Locking Member 8 Center Pin 9 Annular Cutter Insertion Section 9a Locking Member Passing Section 9b Engaging Section 10 Locking Ring 11 Flow Opening / Closing Valve Body 12 Sealing Member

Claims (1)

(57) [Claims] 1. When the cutter is inserted into the arbor mounted on the punching device, the arbor is in a semi-protruding state so that it can be removably attached to the arbor by a locking member provided so as to be retractable by operating the sleeve. An annular cutter to be attached, wherein the annular cutter has an insertion portion into the arbor, and an outer surface of the insertion portion is a locking member that is semi-protruding inward on the arbor side and that allows the locking member to pass therethrough. An annular cutter, characterized in that a member passing recess and an engaging recess that locks with the locking member are connected to each other.