JPS62157710A - Cutting device - Google Patents

Abstract

PURPOSE:To make it possible to firmly and exactly mount a blade section and to perform highly accurate machining by pushing and clamping the blade section having a slant face in one way on a disk shaped cutter body, and by providing adjusting screws. CONSTITUTION:A blade section mounting face 18 in the axis direction of a cutter body 10 is provided with a face section 20 slant in a tangential direction and a face section 22 facing a radial direction. To these face sections, blade sections 26 are mounted and clamped with bolts 56. The hole section 46 of the blade section 26 has a slant face inclined at a specified angle in relation to a face section 34, and the blade section 26 is firmly and exactly mounted to the mounting face 18. Before complete screwing, the axial direction of the blade tip section 52a of the blade section 26 is exactly positioned with the adjusting screw 58 screwed in the tap hole 16 of a flange section 14. The blade section 26 can be removed only by loosing the bolt 56 without its complete removal allowing short time exchanging and exact and firm mounting of the blade section 26.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a canter device, and more particularly, the present invention relates to a canter device, and more particularly, a canter device is provided with a plurality of blades on a disc-shaped cuckoo body, and a position adjustment means is provided in correspondence with each blade. The present invention relates to a cutter device in which the blade portions are firmly attached to the cutter body and the cutting edge portions of each blade portion can be accurately aligned in the cutting direction.

BACKGROUND ART A cutter device, that is, a milling machine, is widely used, which rotates a circular blade fitted on a shaft and feeds the workpiece at a predetermined speed to cut the workpiece with the blade.

Conventionally, such cutter devices include a cuckoo in which a plurality of blades are integrally formed with a cutter body, and a cutter in which the blades are detachably attached to the cutter body. It has reached this point.

However, with the former cutter in which the blade and cutter body are integrated, if there are many workpieces to be cut, the cutting edge will wear out, and even if only the cutting edge needs to be replaced, The drawback is that the entire cutter must be replaced. Furthermore, if the type of workpiece is different, it goes without saying that the cutter itself will need to be replaced depending on the type of workpiece, and for this purpose it is necessary to always have many types of cutters available depending on the type of workpiece. However, it has been pointed out that it is not economical in practice.

On the other hand, there are two types of cutters in which the blade and cutter body are separated: one in which the cutting tip is directly attached to the cutter body, and the other in which the blade to which the cutting tip is fixed is disposed on the cutter body. be. Therefore, if high-precision cutting is desired, a large number of chips or blades must be provided on the cutter body, and the chips or blades must be positioned extremely accurately with respect to the workpiece.

However, conventional cutter devices do not have a function to adjust the position of the cutting blade that makes up the tip, and therefore, it is necessary to accurately position the cutting blade in advance. There was a requirement that all manufacturing operations for the blade be performed with precision.

As a result, the manufacturing process for the cutter as a whole becomes quite complicated, and the work requires a lot of time, resulting in a disadvantage that the manufacturing cost of the cutter increases considerably.

Furthermore, the tip or blade is generally attached to a predetermined-shaped attachment portion provided on the cutter body via a tightening means such as a bolt. Therefore, when a tip or a blade is disposed on the mounting portion and a bolt is firmly tightened, the tip or the blade may be fixed in a displaced state relative to the mounting portion due to the tightening force of the bolt.

For this reason, a disadvantage arises in that the positions of the cutting edges of the chips are uneven. Moreover, when cutting a workpiece, cutting resistance acts on the cutting edge of the chip, which causes the bolts that secure the chip or the blade to loosen, causing the tip or blade to become untightened. There is a risk that it will be insufficient. After all, if a workpiece is cut with such a cutter, it is pointed out that there is a problem in that it is completely impossible to precisely process the workpiece.

The present invention has been made in order to overcome the above-mentioned disadvantages, and includes forming a plurality of attachment portions consisting of grooves of a predetermined shape in a disc-shaped cutter body, and providing blade position adjustment means corresponding to the attachment portions. On the other hand, the blade part is provided with an inclined surface that engages with a blade part mounting bolt, and the bolt is screwed in a predetermined direction to press the blade part toward the position adjustment means, so that the blade part is attached to the mounting part. It is an object of the present invention to provide a cutter device in which the blade portion is firmly and accurately positioned and fixed to a cutter body, thereby making it possible to perform highly accurate machining work on a workpiece.

In order to achieve the above object, the present invention includes a disc-shaped cutter body connected to a rotational drive source, a cutter body that is attached to a mounting portion formed on the cutter body via a tightening means, and that is engaged with the tightening means. a blade portion formed with a matching inclined surface, the inclined surface is formed to be deviated outward at a predetermined angle with respect to the tangential direction, and the tightening means is screwed in a predetermined direction so as to pass through the inclined surface. The blade part is attached to a cutter body so as to be pressed in one direction, and the workpiece is cut by rotating the blade part integrally with the cutter body under the action of a rotational drive source. do.

Next, preferred embodiments of the cutter device according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, reference numeral 10 indicates a cutter body constituting a cutter device according to the present invention. A large diameter stepped hole 12 is provided in the center of the cutter body 10.
is formed in the hole 12, and a rotating shaft connected to a rotational drive source is pivotally attached to the hole 12, as will be described later. A thin flange portion 14 is formed on the outer peripheral edge of the cutter body 10, and a plurality of screw holes 16 are bored in the flange portion 14 at equal intervals and extending in the axial direction thereof. The screw hole 16 is formed on the outer peripheral surface of the cutter body 10.
A plurality of blade attachment portions 18 are formed at equal intervals corresponding to the above.

The mounting portion 18 substantially includes two surface portions 20 and 22 that extend in the axial direction of the cutter body 10 and are integrally formed so as to be bent with each other. As shown in FIG. 2, the surface portion 20 is oriented in the tangential direction (arrow H direction) of the cutter body 10 and is inclined inward, while the surface portion 22 is oriented generally in the radial direction of the cutter body 10. are doing. Further, the cutter body 1 is attached to the surface portion 20.
A screw hole 24 is formed oriented substantially in the radial direction of 0. The screw hole 24 is for attaching a blade portion, which will be described later, to the mounting portion 18. In this case, the screw hole 24 is for attaching the blade portion to the mounting portion 18. It is desirable to select the direction in which the screw hole 24 is inserted so that the direction in which the bolt tends to rotate due to the cutting resistance generated when machining the screw hole 24 is the same.

Therefore, a blade portion 26 having a substantially columnar shape is attached to each mounting portion 18.
Attach. As shown in FIG.
is formed. A surface portion 32 on the opposite side corresponding to the mounting surface 28 is formed substantially parallel to this mounting surface 28, and a chip mounting portion is formed at the corner between the surface portion 32 and the surface portion 34 on the opposite side corresponding to the mounting surface 30. A groove 36 is carved. In this case, as shown in FIG. 2, the surface portion 34 is oriented in the radial direction of the cutter body 10 when the blade portion 26 is attached to the attachment portion 18, and is aligned with the axis of the screw hole 24 formed in the attachment portion 18. It becomes parallel state. Further, the surface portion 32 is formed with an opening 38 for attaching a blade portion.

The opening 38 includes an elliptical first groove 40 and an elliptical second groove 44 that communicates with the first groove 40 via inclined surfaces 42a and 42b, and A hole 46 having the same diameter as the end of the first groove 40 communicates with one end of the groove 44 (see FIGS. 3 and 4). On the other hand, the inclined surfaces 42a and 42b are oriented in a direction perpendicular to the surface portion 34 and are inclined by a predetermined angle θ0. That is, when attaching the blade portion 26 to the mounting portion 18, the inclined surfaces 42a, 4
2b is inclined outward by an angle θ° with respect to the tangential direction (arrow H direction) of the cuckoo body 10 (see FIG. 2).

The surface portion 48 constituting the blade portion 26 slopes inward as it moves away from the groove portion 36, and the surface portion 50 corresponding to this surface portion 48
is perpendicular to the surface portion 34. Then, the cutting tip 52 is fixed to the groove 36 by, for example, brazing.

It is preferable that an escape groove 54 is provided in the cutting edge portion 52a of the tip 52.

After fitting the blade portions 26 configured in this manner into the mounting portions 18 and inserting the bolts 56 into the openings 38, the tips thereof are screwed into the screw holes 24 of the surface portion 20 to assemble the blade portions 26. is attached to the mounting portion 18. Note that the screwing direction of the thread groove of the bolt 56 is selected in correspondence with the screw hole 24. Furthermore, the adjustment screw 58 is screwed into the screw hole 16 of the flange portion 14,
The head portion 58a is brought into contact with the surface portion 50 of the blade portion 26. In this case, the head 58a of the adjustment screw 58 is bored through a hole 60 in the radial direction.

The cutter device according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

Therefore, first, the position of each blade portion 26 is adjusted in accordance with the workpiece W. That is, the bolt 56 is slightly screwed into the screw hole 24 to temporarily fix the blade portion 26, and the adjustment screw 58
is screwed in a predetermined direction to displace the blade portion 26 in the axial direction of the cutter body 10 via its head 58a. In this case, for example, by fitting a bottle member or the like into the hole 60 formed in the head 58a of the adjustment screw 58,
The screwing operation of the adjustment screw 58 can be easily performed.

After pre-positioning with the adjustment screw 58 in this way, if the bolt 56 is further screwed into the screw hole 24 and fully tightened, the interface between the bolt 56 and the head 56a will be aligned with the inclined surface 56.
2a, and thereby the blade portion 26 is attached to the attachment portion 18 of the cutter body 10.

That is, in this way, a plurality of blade parts 26 are fixed to the outer peripheral part of the cutter body 10, and the tip 5 is fixed to the outer peripheral part of the cutter body 10.
2 is accurately positioned and adjusted in the axial direction of the cutter body 10.

Next, the large diameter hole 1 provided in the cutter body 10
When the cutter body 10 is attached to the cutter body 10 through the rotary shaft 2 and the rotary drive shaft 62 connected to the rotary drive mechanism is rotated, the cutter body 10 rotates in the direction of arrow A. When the rotating cutter body 10 is moved close to the workpiece W, the workpiece W is cut by the cutting blades 52a of the plurality of tips 52 mounted on the mounting portion 18. At this time, since the relief groove 54 is formed in the cutting edge portion 52a, the cutting process by the tip 52 can be performed satisfactorily. Furthermore, the surface portion 4 of the blade portion 26
8 away from the groove 36, that is, the direction in which the tip 52
Since the blade part 26 is inclined inward in the direction of separation from the workpiece W, the blade part 26 does not come into contact with the workpiece W during the cutting process by the cutting blade part 52a, and moreover, the cutting waste generated during the cutting process is suitably led out to the outside. .

By the way, when the types of work W are different, it can be easily handled by the procedure shown below. First, once the bolt 56 fixing the blade part 26 is loosened, the adjustment screw 58 is screwed in in a predetermined direction so that the blade part 26 that contacts the head 58a is aligned with respect to the axial direction of the cutter body IO. The position of the cutting edge portion 52a is adjusted to correspond to the new workpiece W. Then, after screwing the bolt 56 into the screw hole 24 and firmly fixing the blade part 26 to the mounting part 18, the cutting process is performed on a new workpiece W as described above.

In this case, according to the present invention, the blade portion 26 can be suitably mounted on the mounting portion 18. That is, the blade portion 26 is provided with inclined surfaces 42a and 42b, and the sloped surfaces 42a and 42b are arranged in the tangential direction of the cutter body 10 (
It is oriented in the direction of arrow H) and is inclined outward by an angle θ0. Therefore, after adjusting the position of the blade part 26 with the adjustment screw 58, if you try to attach the blade part 26 to the mounting part 18 by screwing the tip of the bolt 56 into the screw hole 24, the bolt 56 The boundary surface between the head portion 56a and the head portion 56a is the inclined surface 42a.
(See Figure 2). Therefore, as shown in FIG. 4, when the bolt 56 is screwed in in the direction of arrow C (counterclockwise), the interface between the bolt 56 and the head 56a presses the inclined surface 42a in the direction of arrow B. The surface portion 50 of the blade portion 26 is pressed against the head portion 58a of the adjustment screw 58. Therefore, when tightening the bolt 56, the blade portion 26 will not be displaced with respect to the mounting portion 18, and each tip 52 will be accurately positioned with respect to the cutter body 10. As a result, the blade part 26 is attached to the attachment part 18 by the bolt 56 and is pressed against the adjustment screw 58, so that it can be firmly and accurately attached to the cutter body 1o.

Furthermore, as shown in FIG.
When the tip 52 is rotated in the direction of arrow A and the cutting edge 52a of the tip 52 cuts the workpiece W, cutting resistance acts on the cutting edge 52a in a direction opposite to the direction of arrow A. Therefore, although the blade portion 26 is pressed in the direction of the arrow C, the bolt 56 does not loosen because the screwing direction of the bolt 56 is selected in the direction of the arrow C. As a result, when processing the workpiece W using the cutter body 10, it is possible to process the workpiece W with extremely high accuracy without causing vibration or the like to the blade portion 26.

Furthermore, in this embodiment, the blade portion 26 can be easily replaced. That is, after loosening the bolt 56 slightly, the blade part 2
6 is displaced in the direction opposite to the direction of arrow B in FIG. 4, and the hole 46 is positioned coaxially with the head 56a of the bolt 56. Therefore, by displacing the blade portion 26 radially outward of the cutter body 10, the blade portion 26 is removed from the attachment portion 18 through the hole portion 46. In other words, the bolt 56 is not completely removed from the screw hole 24 and the blade portion 2
6 is replaced, and the replacement work of the blade portion 26 can be performed more easily and in a shorter time.

As described above, according to the present invention, attachment portions of a predetermined shape are formed on a disc-shaped cutter body, and a blade portion having a shape corresponding to these attachment portions and having a cutting tip fixed thereto is attached to the adjusting means. The blade portion is configured such that its position can be adjusted through the blade portion, and an inclined surface that engages with a tightening means such as a bolt is formed on the blade portion. Therefore, by screwing the bolt in a predetermined direction, the blade part can be firmly attached to the attachment part by pressing against the adjustment means. Therefore, when the blade is attached to the cutter body, the blade is accurately positioned and fixed without being displaced relative to the cutter body, and as a result, extremely accurate cutting can be performed on the workpiece. It becomes possible. In addition, there is an advantage that the position adjustment and replacement work of the blade portion is further simplified, and it is possible to suitably handle a variety of different types of workpieces.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to this embodiment. For example, if the cutting rotation direction of the cutter body is opposite, the blade portion may be screwed. It goes without saying that various improvements and design changes can be made without departing from the spirit of the present invention, such as the ability to achieve the same effect by reversing the screwing direction of the bolt.

[Brief explanation of drawings]

FIG. 1 is a partially omitted perspective view of a cutter device according to the present invention, FIG. 2 is a partially omitted plan view of the cutter device according to the present invention, FIG. 3 is a partially omitted vertical sectional view of the present invention device, and FIG. The figure is a partial front view when processing a workpiece using the apparatus of the present invention.

Claims (4)

[Claims] (1) A disc-shaped cutter body connected to a rotational drive source, and a blade portion that is attached to a mounting portion formed on the cutter body via a tightening means and has an inclined surface that engages with the tightening means. The inclined surface is formed to be deviated outward at a predetermined angle with respect to the tangential direction, and the tightening means is screwed in a predetermined direction to press the blade portion in one direction via the inclined surface. 1. A cutter device, characterized in that the cutter device is configured to be attached to a cutter body, and to cut a workpiece by rotating the blade portion integrally with the cutter body under the action of a rotational drive source. (2) In the device according to claim 1, an adjustment screw is screwed in the axial direction into the flange portion formed to protrude from the outer circumference of the disc-shaped cutter body, and the adjustment screw is screwed into the mounting portion via a bolt. An inclined surface is formed on the blade to be mounted, which is oriented toward the counter-rotation direction of the cutter body and is inclined outward.
The position of the blade section is adjusted in the axial direction of the cutter body through the adjustment screw, and the outer end of the inclined surface that engages with the bolt is adjusted by screwing the bolt in a predetermined direction. The cutter device is mounted on a cutter body so that the blade portion is pressed by the bolt and adjustment screw. (3) The device according to claim 2, wherein the blade portion has an oval first groove extending in the axial direction of the cutter body and through which the head of the bolt is inserted, and a rod portion of the bolt. a second oval groove portion through which the first groove is inserted;
An inclined surface is provided at the boundary between the groove portion and the second groove portion and is inclined outward toward the counter-rotation direction of the cutter body, and a hole portion through which the head of the bolt is inserted is provided at one end side of the second groove portion. A cutter device that is connected. (4) In the device according to claim 1 or 2, the screwing rotation direction of the tightening means is configured to coincide with the direction in which the tightening means is about to rotate due to cutting resistance received by the blade part. A cutter device.