JPH0239708Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a unit for attaching a cutting tool to a spindle via a shank.

[Conventional technology and its problems]

When installing a cutting tool on the spindle of a machine tool, if the cutting tool is installed in the axial direction of the spindle (straight), the cutting tool with a shank is installed directly on the spindle, but if an acceleration/deceleration mechanism is added, the drive When installing a cutting tool at an angle with respect to the spindle via a direction change mechanism, it is necessary to support the acceleration/deceleration mechanism and the drive direction change mechanism on the machine tool frame, and for this reason, the unit according to this invention cannot be used. be done.

This unit is disclosed in, for example, Japanese Utility Model Publication No. 58-56112, in which the cutting tool is mounted at an angle. A shank 2 penetrating through the shank 2 is rotatably supported, and one protruding end of the shank 2 forms a connecting part 4 with the spindle 3, and the other protruding end has a cutting tool 5 tilted with respect to the shank 2. A chuck portion 6 is formed to which the unit case 1 is attached, and a pin holder 7 is provided protruding from the unit case 1, and the unit case is fixed to the pin holder 7, which can be latched to the end face of the frame 8 around the spindle 3. A stopper 11 for preventing shank rotation, which can be engaged with a locking part 10 integral with the shank 2, is attached to the locking part 10 such that it can move forward and backward.

To attach this unit to the frame 8 and spindle 3, fit the connecting part 4 into the spindle 3, and lock the unit case fixing pin 9 to the end face of the frame 8 to fix the unit case 1 and lock the stopper 11. The unit case 1 is fixed to the frame 8 and the shank 2 is made rotatable relative to the unit case 1. When the spindle 3 is turned, the cutting tool 5 is rotated through the shank 2 etc. to perform cutting. It is done.

By the way, the type of machine tool (size, model, etc.)
Since the fitting diameter between the spindle 3 and the connecting part 4 differs depending on the chuck part 6 (cutting tool 5) of the same structure,
Even for units with the same mounting angle, type, etc., the connection part 6 must be compatible with each model.

However, in the conventional unit, the unit case 1 is connected to the protruding part of the pin holding base 7 (the connecting part 4 side part) and the chuck part 6 at the cutting work site.
In addition, the driving mechanism consisting of the shank 2 and the like cannot be divided into the two divided unit case parts. For this reason, conventionally, each model is provided with a unit of each chuck structure.

[Purpose of invention]

The purpose of this invention is to keep the above points in mind and to make it possible to replace the chuck side with the pin holding stand side (connection side).

[Means to achieve the purpose]

In order to achieve the above object, in this invention, in the above-mentioned cutting tool mounting unit, the unit case is attached to the pin holding stand by a surface perpendicular to the axis of the linear shank in the middle of the unit case in the longitudinal direction. is divided into a protruding part and a chuck side part, and both of the divided unit case parts are separably connected and fixed by fastening screws at the dividing surface, and the shank is also connected in the middle. It is divided along a plane perpendicular to its axis, and both ends of the divided parts are rotatably supported on the same axis via bearings on the divided unit case part, and both divided parts are also supported on the divided plane. The structure is such that they are separably connected by fitting together.

To connect and fix the above two unit case parts, an inverted T-shaped annular groove is formed on one of the dividing surfaces with the shank as the center, and the required number of annular grooves are formed in the deep part of this annular groove. The structure may be such that a bolt is inserted into each nut and is inserted into the annular groove through the other part of the unit case part.

[Effect]

In a unit constructed in this way, the connecting part is fitted into the spindle, the unit case fixing pin is locked to the end face of the frame, and the stopper is released from the locking part to fix the unit case to the frame. At the same time, the shank is made rotatable relative to the unit case, is attached to a spindle and frame, and cutting is performed by rotating the spindle.

When performing this cutting work on a model with a different connection part, first loosen the screws and remove the unit case part on the chuck side used for the cutting action from the unit case part on the connection part side, and then
The connection to the spindle is made by the connecting part side unit case part corresponding to the different model, and the chuck part side unit case part which was removed is attached to this case part by fastening screws.

On the other hand, when performing different tasks on the same model, the chuck side portion corresponding to the task is replaced and the task is performed accordingly. In other words, if you manufacture a connecting part side unit case part that corresponds to each model, and also manufacture a chuck part side unit case part that corresponds to various types of work, and if the connection means for both unit case parts are the same, then both cases Various tasks can be performed on each model simply by selectively replacing parts.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

[Embodiment 1] As shown in FIGS. 1 and 2, in this embodiment, as in the conventional case, a shank 2 passing through the case 1 is rotatably supported in a unit case 1. A truncated conical connection part 4 with a spindle 3 of a machine tool is formed at one projecting end of the shaft, and a chuck part 6 is formed at the other projecting end. This chuck portion 6 is rotatably provided in the case 1 with the shank 13 of the chuck 12 positioned at right angles to the shank 2, and both shank 2 and 13 are connected via a bevel gear 14.
When the shank 2 rotates, the chuck 12 rotates via the bevel gear 14 and the shank 13, and the chuck 1
A cutting tool 5 attached to the shank 2 rotates while being inclined at right angles to the shank 2.

The unit case 1 is divided into two parts at the mounting end of the pin holder 7 along a plane perpendicular to the shank 2, and the shank 2 is also divided in correspondence with the case division (see FIG. 4). As shown in FIG. 4, the split connecting portion of the shank 2 has an engaging groove 50 formed in the end of the portion 2a of one (connecting portion 4) in the direction of the end surface passing through the center, and the other (chuck portion 6).
A rectangular parallelepiped-shaped engagement protrusion 51 that engages with the groove 50 is provided on the portion 2b (side).
By fitting 1, the shank portions 2a, 2
b is connected and fixed.

Both divided parts 1a and 1b of the unit case 1 are
It is rotatable in shank portions 2a, 2b via bearings 15a, 15b, 15', respectively.
The other portion 1b is partially fitted into the bearing 15b on the connecting portion side of one portion 1a to center the portion 1b. An annular groove 16 having an inverted T-shaped cross section is formed toward the divided surface of one portion 1a,
This groove 16 has a through hole 17' that opens to the inner surface of the case at one location around the periphery, and the nut 17 is inserted into the groove 16 through this through hole 17', and then the nut 17 is inserted into the groove 16.
The bolt 18 inserted into the groove 16 from the nut 1
7, both parts 1a and 1b are tightened and fixed. A required number of bolts 18, for example four, are provided at equal intervals around the groove 16. Loosen the bolts/nuts 18 and 17 and rotate one part 1a to the other part 1b to the required position, and then tighten the bolts at that position. When tightened, both 1a and 1b are integrated.

Incidentally, a circumferential scale is formed on the outer periphery of one unit case part with the dividing plane as a boundary, and a reference line is formed on the other part, and the required rotational position can be determined by comparing the scale with the reference line. , that is, the cutting angle of the cutting tool 5 is set.

Also, a different structure of the chuck portion 6, for example a seventh
As shown in the figure, if you want to replace the other part 1b with one that mounts the cutting tool 5 at a 45-degree angle to the shank 2, remove the bolt 18 from the nut 17, remove the attached part 1b, and insert the required part. 1b
Install. In this case, unit case part 1
Of course, the connection structures of a, 1b and shank portions 2a, 2b are the same.

A pin holder 7 is bolted to protrude from one of the unit case portions 1a, and a hollow pin 9 for fixing the unit case 1, which is movable toward the end surface around the spindle 3, is attached to the pin holder 7. The pin 9 is fitted in, and the pin 9 is biased in the projecting direction by a spring 19. The tip of the pin 9 is formed into a tapered shape, and by fitting this tip into a locking hole 20 formed in the end surface of the frame 8, the pin 9
The unit case 1 is fixed to the frame 8 via. A supply oil passage 21 in the frame 8 opens in the locking hole 20, and when the pin 9 is fitted into the locking hole 20 and cutting oil is sent into the oil passage 21 from a cutting oil supply source (not shown). , the cutting oil flows into the locking hole 20
It reaches inside pin 9 through.

A stopper 11 for preventing two rotations of the shank is slidably fitted into the unit case fixing pin 9, and the protruding piece 11a of the stopper 11 is fitted into a locking part 10 formed on the outer surface of the shank. The shank 2 is fixed to, for example,
To prevent undesired rotation of the shank 2 during automatic replacement of this unit in a machining center. A guide pin 22 protruding from the pin holding base 7 slidably passes through the protruding piece 11a and attaches to the stopper 11.
At the same time, the stopper 11 is constantly biased by the spring 24 via the pin 23 protruding from the pin holder 7 as shown by the chain line in FIG. The unit case fixing pin 9 is inserted into the locking hole 20.
When the stopper 11 is inserted into the frame 8, the stopper 11 comes into contact with the end surface of the frame 8 and is pushed as shown by the solid line in the figure, and the protruding piece 11a
is retreated and separated from the locking portion 10, and the shank 2 becomes rotatable with respect to the unit case 1.

An annular contact surface 26 is formed on the outer circumferential surface of the other unit case portion 1b, and the annular contact surface 26 is centered around the shank 2 into which the ring 25 fixed to the pin holding base 7 is slidably fitted. 26 is formed with an annular groove 27 coaxial with the surface thereof. As shown in FIGS. 1 and 6, the ring 25 has a recess 25a formed at one location around its periphery, and by fitting the protrusion of the pin holding base 7 into the recess 25a via an oil seal, the ring 25 is removed. is integrated with the pin holding base 7. An oil passage 28 leading to the hollow part of the pin 9 is guided to the protrusion of the pin holding base 7, and this oil passage 28 passes through the through hole 28a of the recess 25a to the groove 2.
Even if the unit case portion 1b rotates with respect to the ring 25, the cutting oil in the pin 9 will flow into the oil channel 2.
8 and is guided into the groove 27 via the through hole 28a.

Further, on the surface of the other unit case portion 1b facing the chuck 12, as shown in FIGS. 1 and 3, four jet ports 29 facing the cutting tool 5 are formed with the cutting tool 5 as the center. Each spout 29
is connected to the groove 27 by an oil pipe 30,
Cutting oil in the groove 27 passes through the oil pipe 30 to the spout 29
from the cutting tool 5. The required number of oil passages 30 (for example, five) are formed at required intervals around the unit case portion 1b, and the cutting oil passing through each oil passage 30 is transferred from the bearing 15', the bevel gear 14, the bearing 13', etc. It has a cooling effect that covers the heat dissipation and cutting heat.

As shown in Fig. 16, the unit configured in this way is manufactured by manufacturing the required number of unit cases 1a each having a connection part 4 corresponding to the spindle 3 of various machine tools, and by connecting all of the cases 1a. A number of other possible unit cases 1b are manufactured according to the cutting angle, the size of the cutting tool 5, the length (machining depth) of the cutting tool 5, etc.

The embodiment is configured as described above, and its operation will be explained next.

In order to carry out the cutting action using this embodiment, first, the unit case portion 1a corresponding to the model used is
At the same time, select the unit case part 1b that corresponds to the work, and connect and connect both parts 1a and 1b.
The connecting part 4 of this unit is fitted into the spindle 3, the unit case fixing pin 9 is fitted and locked into the locking hole 20 on the end face of the frame 8, and the stopper 11 is inserted into the locking part 10.
and fix the unit case 1 to the frame 8.
is rotatable, and the spindle 3 and frame 8
Attach the unit to the

In this state, when the spindle 3 is rotated, the cutting tool 5 rotates via the shank 2, bevel gear 14, shank 13, and chuck to perform cutting. During this cutting, cutting oil flows from the supply oil path 21 of the frame 8.
The spout 2 passes through the hollow part of the pin 9, the annular groove 27, etc.
9 to the cutting tool 5 for smooth cutting action.

Further, the cutting angle can be changed by rotating and fixing the chuck side (other) unit case part 1b at a desired position relative to the pin holding stand side (one) unit case part 1a. At this time, since the oil passages of both unit case parts 1a and 1b are connected through the annular groove 27, the cutting oil reaches the spout 29 and spouts out without any support at all cutting angles.

[Embodiment 2] In this embodiment, the unit case 1 is divided and connected as shown in FIGS.
A is rotatably fitted to the other part 1b, and a cut groove 31 is formed in the other part 1b, and by tightening the bolt 32 between the cut grooves 31, the inner diameter of the member 1b is reduced to form a member. It is designed to be fixed to 1a and 1b by pressure contact.

[Example 3] As shown in FIG. 10, in this example, similarly to Example 2, one part 1a is rotatably fitted to the other part 1b, and the fitting surface of one part 1a is Inverted conical concave seats 33 are placed at equal intervals (for example, 4 locations) around the periphery.
A screw 34 threaded through the other portion 1b is press-fitted into the seat 33 to constitute means for dividing, connecting, and fixing the two members 1a and 1b. The seat 33 may be formed over the entire circumference, that is, may be a groove having a triangular cross section over the entire circumference of the member 1a.

[Embodiment 4] In this embodiment, cutting oil can be supplied from the oil pipe 30 to the shank 13 of the chuck portion 6 by the structure of the annular groove 27 described above.
As shown in FIG. 12, an annular groove 40 is formed on the other unit case portion 1b side, a packing 41 is inserted into this groove 40, and the shank 13 is inserted into the groove 40.
Four guide holes 42 are formed in the shaft center hole 13a. Therefore, the cutting oil in the oil passage 30 passes through the groove 40 and the guide hole 42 into the shank 13, and then reaches the cutting tool 5 having an oil seal.

In each of the above embodiments, the unit case fixing pin 9
Although the shank rotation preventing stopper 11 is formed separately, it is also possible to integrate both 9 and 11 as described in Japanese Utility Model Publication No. 55-15946.

Furthermore, cutting oil can be supplied at any cutting angle by forming an annular groove 27 on the ring 25 side and communicating the hollow part of the pin 9 and the spout 29 with this groove 27.

Furthermore, the oil pipe 30 may be formed spirally in the axial direction of the unit case portion 1b to provide a cooling effect.In this case, the unit case portion 1b has a double pipe structure, and the oil pipe is formed between the double pipes. form 30.

The means for dividing and connecting and fixing the two parts 2a and 2b of the shank 2 is not limited to the one in the embodiment, but may be one in which the groove 50 and the protrusion 51 are shaped like a cross as shown in FIG. Various structures are conceivable, such as a spline connection, as shown in FIG. 15, and an Oldham joint as shown in FIG.

[Effect of idea]

This invention is structured as described above, and the unit case and shank are divided, connected, and fixed into the spindle connection side and the chuck side, so that various machining operations can be performed as explained in Fig. 16. One unit case with a connection part corresponding to the spindle of the machine is manufactured in the required number, and the other unit case that can be connected to all of the cases is manufactured in a number according to the cutting angle, size and length of the cutting tool, etc. By manufacturing just one, there is no need to provide a unit for each chuck structure for each model as in the past, and the number of parts related to the unit in each cutting operation is reduced, which has the effect of reducing costs.

[Brief explanation of the drawing]

FIG. 1 is a cutaway front view of essential parts of an embodiment of the cutting tool mounting unit according to this invention, FIG. 2 is a right side view of FIG. 1, FIG. 3 is a bottom view of essential parts of FIG. 1, and FIG. The figure is a cutaway front view of the main part of Fig. 1 in the separated state, Fig. 5 is a view taken along the Y-Y line in Fig. 4, Fig. 6 is a perspective view of the main part of Fig. 1, and Fig. 7 is a front view of the main part in the separated state. FIGS. 8, 10, and 11 are cutaway front views of the main parts of the embodiment, FIG. 9 is a perspective view of the main parts of FIG. 8, and FIG. 12 is a front view of the main parts of the embodiment. FIG. 11 is a sectional view taken along the line X--X, FIGS. 13 to 15 are perspective views of each example of the means for dividing, connecting, and fixing the shank, and FIG. 16 is an explanatory diagram of the combination. 1...Unit case, 1a, 1b...Divided portion of unit case, 2...Shank, 2a, 2
b... Divided part of shank, 3... Spindle,
4...Connection part, 5...Cutting tool, 6...Chuck part, 7...Pin holding stand, 8...Frame, 9...
Unit case fixing pin, 10... Shank side locking part, 11... Stopper for preventing shank rotation, 16... Inverted T-shaped groove, 17... Nut, 18
...Bolt, 20...Frame side locking hole, 21...
... Supply oil pipe, 25 ... Ring, 26 ... Annular contact surface, 27 ... Annular groove, 28, 30 ... Oil pipe, 2
9... spout, 31... kerf, 32, 34... bolt, 33... seat.

Claims (1)

[Claims for Utility Model Registration] (1) A linear shank 2 passing through the unit case 1 is rotatably supported, and a spindle 3 is attached to one protruding end of the shank 2.
At the same time, a chuck part 6 to which a cutting tool 5 is attached is formed at the other protruding end, and a pin holder 7 is attached to the unit case 1.
A unit case fixing pin 9 which can be engaged with the end face of the frame 8 around the spindle 3 is inserted into the pin holding base 7 so as to be able to move forward and backward.
Stopper 1 for preventing shank rotation that can be engaged with
1 is attached to the locking part 10 so as to be able to move forward and backward. 7 is divided into a protruding portion 1a and the chuck side portion 1b, and both of the unit case portions 1a and 1b are connected and fixed by tightening screws at the dividing surface, and the shank 2 is also connected in the middle. It is divided on a plane perpendicular to its axis, and both ends of the divided parts 2a and 2b are connected to the divided unit case parts 1a and 1b on the same axis with bearings 15a, 15b, 1.
The cutting tool mounting unit is rotatably supported via the cutting tool 5', and the two divided portions 2a and 2b are separably connected by fitting at the dividing surfaces. (2) An inverted T-shaped annular groove 16 is formed on one of the dividing surfaces of the unit case portions 1a and 1b, with the shank 2 as the center;
A required number of nuts 17 are inserted into the inner part of the annular groove 16, and a bolt 18 that passes through the other of the unit case parts 1a and 1b and inserted into the annular groove 16 is screwed into each nut 17. A cutting tool mounting unit according to claim (1) of the utility model registration, characterized in that both unit case parts 1a and 1b are separably connected and fixed.