JP2510951Y2 - Double-edged bowling tool - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a double-edged boring tool which is used for a balance cut of a double-edged blade and which has a pair of cutting blades in the radial direction. More specifically, it is movable in the radial direction on a boring head. A pair of cutting blades are held by a cartridge, which is a cutting blade holding table, and is used as a punching tool having a cutting diameter corresponding to the facing interval between the pair of cutting blades at a position where the pair of cartridges are moved and adjusted in the radial direction. The present invention relates to a double-edged boring tool.

[0002]

2. Description of the Related Art The prior art of the present invention will be explained with reference to FIG. 1 showing an embodiment of the present invention. As shown in FIG. 1, a connecting portion 12 of a boring head 1 is provided in a connecting hole 11a of a boring body 11. By fitting and screwing the set screw 13 from the side of the boring body 11 and pressing the connecting portion 12, the boring head 1 is accurately and concentrically connected to the boring body 11.

As shown in FIGS. 1 to 3, a pair of cutting blade holding cartridges 2 are fitted in the boring head 1 in guide grooves 14 formed in the tip end surface of the boring head 1.
The respective cartridges 2 and 2 are movable and adjustable along the guide groove 14 so as to be spaced apart from or approaching each other in the radial direction, and at the adjusted position, the boring head 1 is provided by the lock means 3 including the lock bolt 15 and the lock nut 16. It is designed to be fixed to. Note that the lock bolt 15 has a large screw pitch in the screw portion 15a of the portion to be screwed into the boring head 1 and a small screw pitch in the screw portion 15b of the portion to which the lock nut 16 is screwed. Different so-called differential screws are used, and the bottom surface 16a of the lock nut 16 and the contact surface 2a of the cartridge 2 that contacts the lock nut 16 are formed as tapered surfaces.

A cutting blade 4 is provided on each of the cartridges 2 and 2.
Are held by being screwed, and adjusting pins 17 each having a function to be described later are integrally projectingly provided on the back side thereof, and as shown in FIG. 7, the adjusting pins 17 are movable in the radial direction. Notch 18 on the end surface of the boring head 1
Is formed, and screw holes 19 and 20 are formed so as to communicate with the cutout portion 18 on both sides in the radial direction thereof.
Adjusting screws 21 and 2 so that the adjusting pin 17 is sandwiched between
2 is screwed.

As shown in FIG. 1, the facing distance between the cutting edges 4 and 4 at both ends of the boring head 1 in the radial direction is the cutting diameter L. When the cutting diameter L needs to be changed, both cartridges 2 are used. It is necessary to release the lock means 3 for the both and adjust the movement of both the cartridges 2 in the radial direction along the guide groove 14. This adjusting method is screwed with the adjusting pin 17 sandwiched as shown in FIG. Adjusting screws 21,2
It is designed to be performed by moving 2. That is, in order to move and adjust the cutting edge 4 to the left in FIG. 7 in order to increase the cutting diameter L, the pair of adjusting screws 21 and 21 are used.
2 of the adjusting screws 21 on the left side is moved away from the adjusting pin 17 by using the hexagon wrench T and moved to the left, and then the adjusting screw 22 on the right side is adjusted by the hexagon wrench T.
7 is pushed to move the cartridge 2 which is integral therewith to the left. However, since the cartridge 2 does not restrict the movement in the radial direction by releasing the lock means 3, the adjustment screw 22 is pushed. Due to the action, it moves more than necessary in the radial direction.
When the adjustment position of the cutting blade 4 is determined by measuring with a measuring instrument M or the like as shown in FIG. It is fixed to 1.

[0006]

In order to adjust the cutting diameter L by the pair of cutting blades 4 and 4 provided on the boring head 1 as described above, a protrusion is provided on the back surface of the cartridge 2 holding the cutting blade 4. A pair of adjusting screws 21, 2 screwed into the boring head 1 with the adjusted adjusting pin 17 sandwiched therebetween.
This requires an extremely troublesome adjustment work of moving the right and left two times several times. This is because the rattling of the cartridge 2 is regulated when the lock means 3 is unlocked from the cartridge 2 as described above. Since there is nothing to do, the cartridge 2 moves more than necessary during the adjustment work, and it is necessary to further finely adjust the moving position.

Therefore, the present invention prevents unnecessary rattling during the above-described adjustment work of the cartridge 2,
The problem to be solved is to reduce the adjustment work as much as possible.

[0008]

In order to solve the above-mentioned problems, the present invention provides a boring head 1 in the invention according to claim 1 by referring to the reference numerals shown in the embodiments. A pair of cutting blade holding cartridges 2 are attached so as to be movable and adjustable in the radial direction, and both cartridges 2 are moved by the locking means 3 at the adjusting position so that both cartridges 2 are drilled.
In the multi-blade drill, which is fixed to the boring head 1 so that a pair of cutting blades 4 respectively held by the two cartridges 2 can be mounted on the boring head 1 so as to be adjustable in the radial direction. On the back side of the cartridge, elastic load means 5 for constantly applying an elastic force from the side direction with respect to the moving direction is provided, and each cartridge 2 can move while receiving the load of the elastic force when moving in the radial direction. The elastic load means 5 is a boring head.
1 is installed in the radial through hole 6 formed in
A pressing body 7 that contacts the back surface 2b of the ridge 2 and presses this
Spring 8 and a flap for adjusting the spring pressure.
Oroset screw 9 and the back of the cartridge 2
2b is formed at an eccentric position with respect to the axis of the through hole 6.
So that the pressing body 7 abuts in an eccentric state.
The configuration including the V groove 10 is adopted.

[0009]

[0010]

[0011]

According to the first aspect of the invention, the elastic loading means 5 for constantly applying the elastic force from the lateral direction with respect to the moving direction is provided on the back side of each cutting edge holding cartridge 2 holding the cutting edge 4. Since each cartridge 2 is movable while receiving the load of the elastic force when moving in the radial direction, even if the lock means 3 is unlocked with respect to the cartridge 2, the cartridge 2 is guided by the guide groove 14 It is possible to move in the radial direction without rattling along with and always being elastically regulated. Therefore, the moving amount of the adjusting screws 21 and 22 for pressing the adjusting pin 17 described above can be accurately followed. Since the cartridge 2 does not move unnecessarily due to the pressing action of the adjusting screws 21 and 22, unlike the conventional case, the adjusting screw 21 and
It is not necessary to move and adjust 22 frequently, and the adjustment operation can be performed easily and quickly.

Further, since the cartridge 2 is constantly subjected to the elastic force load in the lateral direction with respect to the moving direction by the elastic load means 5, the cartridge 2 between the boring head 1 and the cartridge 2 moving in the guide groove 14 is moved. The clearance 2 does not cause the cartridge 2 to be displaced, and it is possible to maintain an accurate mounting position in the unit of micron.

Further, according to the present invention , the elastic load means 5 is
A pressing body 7 such as a sphere which is housed in a radial through hole 6 formed in the boring head 1 and contacts the back surface 2b of the cartridge 2, a spring 8 for pressing the pressing body 7, and a foroset screw 9 for adjusting the spring pressure. Therefore, the configuration is extremely simple, and the elastic force of the elastic load means 5 can be easily adjusted.

According to the present invention, the cartridge 2 is also provided.
On the rear surface 2b of the through hole 6 at an eccentric position with respect to the axis of the through hole 6.
Since the groove 10 is formed so that the pressing body 7 comes into contact with the V groove 10 in an eccentric state, the lock means 3 is released so that the radial direction and the axial direction with respect to the cartridge 2 can be changed as shown in FIG. A microscopic gap can be formed between the cartridge 2 and the boring head 1 by the resultant vector force, whereby the cartridge 2 receives the elastic load force of the elastic load means 5 and is mounted in its width direction and axial direction. It is possible to move smoothly in the adjustment direction while maintaining the position.

Further, even when the cartridge 2 is fixed to the boring head 1 by the lock means 3 at the adjusting position, the cartridge 2 is constantly pressed by the elastic load means 5, so that the cartridge 2 is prevented from swinging at the time of fixing and is accurately fixed. be able to.

[0016]

1 and 2 show the appearance of an embodiment of the present invention, in which components similar to those of the prior art are designated by the same reference numerals as those used in the description of the prior art. 3 to 5, the cutting edge holding cartridge 2 mounted on the boring head 1 has a V groove 10 of 90 ° formed along the longitudinal direction on the rear surface 2b side thereof. There is. The elastic load means 5 includes a spherical body 7 as a pressing body, a spring 8 for pressing the spherical body 7, and a spring 8.
Foroset screw 9 for adjusting pressure and these
It is installed in the through hole 6 formed in the radial direction of the ring head 1.
Slightly downward from the through hole 6 as shown in FIG.
The V-groove 10 is formed at a biased position, and therefore the sphere 7 installed therein presses the V-groove 10 to apply a vector pressure, which is a resultant force in the axial direction and the radial direction, to each cartridge 2, As a result, as shown in FIG. 4, the cartridge 2 is loaded with the elastic force of the elastic load means 5 not only in the radial direction of the boring head 1 but also on the depth side.

In order to adjust the movement of the cartridge 2 in the radial direction, the lock nut 16 screwed into the lock bolt 15 of the lock means 3 may be loosened slightly. As a result, the rear surface 2b side of each cartridge 2 receives the elastic force of the elastic load means 5 in its V groove 10, and the tapered contact surface 2a on the inner peripheral side of the cartridge 2 contacts the bottom surface 16a of the lock nut 16. The bottom surface 2c of the cartridge 2 is in contact with the guide groove 14 of the boring head 1.
The cartridge 2 is in contact with the bottom surface of the boring head 1, and even if the locking means 3 is loosened, the cartridge 2 is not displaced by the clearance between the boring head 1 and the protruding direction of the cartridge 2 from the boring head 1. It is possible to move in the radial direction while maintaining the position in the width direction.

In this state, as shown in FIG. 7, the adjustment pin 1
The adjustment screws 21 and 22 screwed in with 7 in between may be screwed left and right using a hexagon wrench T to press the adjustment pin 17. At this time, the cartridge 2 integrated with the adjusting pin 17 is always subjected to the elastic load force of the elastic load means 5, so that the pressing action of the adjusting screws 21 and 22 does not move the cartridge more than necessary, and the amount of the pressing force of the adjusting screw is accurate. In addition, it moves while maintaining the widthwise and axial positions as described above.

When the cutting blade 4 reaches the required adjustment position by measuring with the measuring instrument M, the lock nut 16 is again pressed.
By tightening, the cartridge 2 can be fixed to the boring head 1 while receiving the load of the elastic load means 5 and maintaining its position even during the tightening.

[0020]

According to the first aspect of the invention, when the cutting blade holding cartridges for holding the cutting blades are moved and adjusted in the radial direction, the cartridges are moved and adjusted without being displaced in the width direction. The adjustment work can be performed accurately, and the adjustment work can be performed quickly and easily.

Further, since the cartridge is always kept in the fixed position by the elastic load means, the floating clearance between the cartridge and the boring head can be minimized, and the tolerance can be brought to the micron unit.

Further, according to the present invention , the elastic load means is installed in a radial through hole formed in the boring head,
The pressing member that comes into contact with the back surface of the cartridge, the spring that presses the pressing member, and the folloset screw for adjusting the spring pressure have a very simple structure, and the elastic force of the elastic load means can be easily adjusted. It can be carried out.

Further, according to the present invention , when each cutting blade holding cartridge for holding the cutting blade is radially moved and adjusted, not only the cartridge can be moved and adjusted without being displaced in the width direction. The adjustment work can be performed accurately without displacement in the protruding direction of the cartridge, that is, in the axial direction.

[Brief description of drawings]

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

FIG. 2 is a plan view of the same.

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

FIG. 4 is an enlarged sectional view of the main part.

FIG. 5 is a perspective view of the main part.

FIG. 6 is a front view of the main part.

FIG. 7 is a front view showing the same usage state.

[Explanation of symbols]

 1 Boring Head 2 Cartridge for Holding Cutting Edge 3 Locking Means 4 Cutting Edge 5 Elastic Load Means 6 Through Hole 7 Pressing Body (Sphere) 8 Spring 9 Fororeset Screw 10 V Groove

Claims (1)

(57) [Scope of utility model registration request] 1. A pair of cartridges for holding a cutting blade are mounted on a boring head so as to be movable in the radial direction, and both cartridges are fixed to the boring head by a locking means at the adjusted position, and the cartridges are respectively held by the cartridges. In a double-edged boring tool in which a pair of cutting blades are attached to a boring head so as to be adjustable in the radial direction, a cutting blade holding cartridge is mounted on the back side of the cutting blade holding cartridge from a lateral direction with respect to its moving direction. An elastic load means for constantly applying an elastic force is provided so that each cartridge can move while receiving the load of the elastic force when moving in the radial direction.
Is installed in the radial through hole formed in the ring head,
The pressing body that comes in contact with the back surface of the cartridge and the pressing body
The spring to press and the flap to adjust the spring pressure.
The front side of the cartridge and the
It is formed at an eccentric position with respect to the axis of the through hole and
A V-groove that allows the body to contact the eccentric state,
A double-edged boring tool.