JPH07227704A - Turret type turret for automatic lathe - Google Patents

Abstract

(57) [Abstract] [Purpose] A turret type turret of an automatic lathe that can be indexed with a large number of processing tools without increasing the size of the turret itself or the indexing device. To provide. [Structure] A polygonal turret provided with an arbitrary number of machining tool mounting surfaces is arranged in series in the axial direction while being shifted by a predetermined angle in the rotational direction. As an example, it is conceivable that the polygonal turret is an octagonal turret, and the octagonal turrets are arranged in series while being shifted by 22.5 ° in the rotational direction to form a turret type turret of an automatic lathe. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turret type tool rest of an automatic lathe, and more particularly, to a common rotary tool unit without increasing the size of the tool rest itself or the indexing device. The present invention relates to a device devised so that a large number of machining tools can be provided and indexed without deteriorating.

[0002]

2. Description of the Related Art Turret-type turrets for automatic lathes
For example, the configuration is as shown in FIG. The turret type tool post 101 shown in FIG. 5 is an octagonal type and has eight machining tool mounting surfaces 103. Tool holders 104 are detachably attached to the eight machining tool attachment surfaces 103, and machining tools 105 are detachably attached to the tool holders 104, respectively. Then, an arbitrary machining tool 105 is selected from the eight machining tools 105 to be used by an indexing device (not shown).

On the other hand, recent automatic lathes are equipped with secondary machining capabilities such as cross machining, key groove machining, eccentric hole machining, polygon machining, etc. for turning and drilling, and are capable of machining complex parts. Is being developed. In this type of automatic lathe, it is necessary to attach a large number of machining tools such as a turning tool and a rotary tool for drilling in order to perform complicated part machining. In such cases, for example,
A turret type tool rest 101 as shown in FIG. 6 is used. This turret type tool post 101 is a hexagonal type,
It is provided with 16 machining tool mounting surfaces 103. 1 above
The tool holder 104 is provided on the six machining tool mounting surfaces 103.
Is removably attached to the tool holder 10
A machining tool 105 is detachably attached to each of the parts 4. Then, an arbitrary machining tool 105 among the 16 machining tools 105 is indexed and used by an indexing device (not shown).

Of the various machining tools 105, a rotary tool (for example, a drill for drilling) is rotationally driven by a mechanism as shown in FIG. Note that FIG. 7 illustrates the octagonal turret type tool post 101 shown in FIG. 5 as an example. First, there is a shaft 107 connected to the drive motor side (not shown), and a gear 109 is fixed to this shaft 107. On the other hand, another gear 111 is fixed to the rotary tool 105 side.
Mesh with the gear 109. Therefore, by rotating the drive motor, the shaft 107 and the gear 10
9, the rotary tool 105 rotates via the gear 111. Further, the rotary tool 105 and the tool holder 10
4, the gear 111 is unitized as a rotary tool unit. The indexing device is omitted in the figure, as already described.

As described above, the turret type tool post 101
There is an octagonal type as shown in FIG. 5 and a hexagonal type as shown in FIG. 6, and in the case of the hexagonal type turret type tool post 101, naturally,
More tool holders 104 can be provided compared to the rectangular turret type tool rest 101. However, as is clear from comparison between FIG. 5 and FIG. 6, it can be seen that the hexagonal turret tool post 101 is significantly larger than the octagonal turret tool post 101. . That is, assuming that the distance from the center of the turret type tool rest 101 to the machining tool mounting surface 103 is (r), this distance (r) is as shown by the following formula (I). r = B / 2 tan (π / n) --- (I) where B: width of machining tool mounting surface n: number of machining tool mounting surface And, for example, width of machining tool mounting surface 103 (B ) Is 70 mm, the distance (r) in the case of the octagonal turret type tool post 101 is 84.5 mm from the above formula (I), and in the case of the hexagonal type turret type tool post 101. The distance (r) is 176 mm. That is, if it is attempted to double the number of attachable machining tools 105, the distance (r) from the center of the turret type tool post 101 to the machining tool attachment surface 103 becomes 2.1 times, and the turret type tool post 10
1 itself will become large.

Considering that the inertial load is proportional to the square of the radius of gyration, as described above, the turret type tool post 1 is used.
Since 01 itself has a large diameter, the indexing device for the turret type tool post 101 also becomes large.
Further, the turret type tool rest 101 itself is increased in size, and the cost is significantly increased.

Further, among the machining tools 105, the rotary tool 10
The configuration for rotating 5 also changes. That is, the configuration of the drive mechanism of the rotary tool 105 in the case of the octagonal turret type tool post 101 is as shown in FIG. 7, but when this becomes the hexagonal type turret type tool post 101, As you can see, the turret type turret 1
Since the distance (r) from the center of 01 to the machining tool mounting surface 103 changes, it is necessary to change the number of teeth of the gears 109 and 111 for transmitting the rotation correspondingly. Therefore, there arises a problem that the rotary tool unit (the unit including the rotary tool 105 to the gear 111 in FIG. 7) cannot be shared. In other words, the rotary tool unit attached to the octagonal turret type tool post 101 cannot be attached to the hexagonal turret type tool post 101 as it is.

In order to solve the above problems, for example, a turret type tool rest 201 having a structure as shown in FIG. 8 has been proposed. First, the turret type tool post 201 has eight machining tool mounting surfaces 203,
The tool holder 2 is attached to these eight machining tool mounting surfaces 203.
Various processing tools 205 are attached via 04. Among them, the tool holder 204 attached on the left side in FIG. 8 is configured so that two machining tools 205 can be attached. In this way, the tool holder 204 capable of mounting two processing tools 205 instead of one is adopted, and the indexing device is subdivided (indexing is performed at half the normal angle). By doing
It is intended to increase the number of processing tools 205 that can be used without increasing the size of the turret type tool rest 201 itself or the size of the indexing device.

[0009]

The above-mentioned conventional structure has the following problems. First, in the turret type tool post 201 having the configuration shown in FIG. 8, as is clear from the figure, by increasing the number of the processing tools 205, there is a fear of interference with another adjacent processing tool 205. , The tool holder 2 so that such interference can be prevented.
There was a problem that the shape of 04 was restricted.
As described above, when the shape of the tool holder 204 is restricted, it may be inferior in terms of mechanical strength.
There was a problem that it was difficult to obtain sufficient rigidity of 04. Further, a tool holder 20 capable of mounting two machining tools 205 on all eight machining mounting surfaces 203.
It is not possible to attach the 4. That is, such attachment may be difficult in terms of space depending on the shape of the processing tools 205 that are adjacent to each other. Therefore, the number of machining tools that can be increased is limited and insufficient.

The present invention has been made on the basis of such a point, and the object thereof is not to increase the size of the tool rest itself or the indexing device, and to use a common rotary tool unit. (EN) Provided is a turret type tool post of an automatic lathe which can be equipped with a large number of machining tools and can be indexed without impairing the performance.

[0011]

In order to achieve the above object, a turret type tool rest of an automatic lathe according to the present invention is configured so that a polygonal type turret provided with an arbitrary number of machining tool mounting surfaces is displaced by a predetermined angle in a rotating direction. It is characterized in that they are arranged in series in the axial direction in the opened state. As an example, it is conceivable that the polygonal turret is an octagonal turret, and the octagonal turrets are arranged in series while being shifted by 22.5 ° in the rotational direction to form a turret type turret of an automatic lathe. .

[0012]

In other words, the turret type tool rest of an automatic lathe is arranged in series in the axial direction with a polygonal turret provided with an arbitrary number of machining tool mounting surfaces displaced by a predetermined angle in the rotational direction. Therefore, the number of usable machining tools can be increased while avoiding an increase in size of the turret type tool rest itself, an increase in size of the indexing device, and a non-common use of rotary tool units.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Turret type tool post 1 according to this embodiment
As shown in FIG. 2, the octagonal turrets 1a and 1b are arranged in series in the axial direction, and they are integrated in a state in which they are displaced in the rotational direction by a predetermined angle (22.5 ° in this embodiment). It is a thing. Eight machining tool mounting surfaces 3 are formed on the octagonal turret 1a, and eight machining tool mounting surfaces 5 are also formed on the octagonal turret 1b. A tool holder 7 is detachably attached to each of the machining tool attachment surfaces 3, and a machining tool 9 is detachably attached to each of the tool holders 7.
Further, the tool holder 11 is also attached to the machining tool mounting surface 5, respectively.
Are removably attached to each of the tool holders 1
A machining tool 13 is detachably attached to the machine 1.

Of the machining tools 9 and 13, the rotary tools 9 and 13 are rotated by the mechanism shown in FIG. That is, there is a shaft 15, and gears 17 and 19 are coaxially fixed to the shaft 15 at a predetermined interval. On the other hand, on the rotary tools 9 and 13 side,
Gears 21 and 23 are fixed, respectively. These gears 2
The gears 1 and 23 mesh with the gears 17 and 19, respectively.
Further, there is a drive motor 25, and a gear 27 is fixed to an output shaft 25a of the drive motor 25. A gear 29 is fixed to the shaft 15, and the gear 27 meshes with the gear 29. Therefore, the drive motor 2
As the gear 5 rotates, the gears 27, 29 and the shaft 1
5, the machining tools 13 and 19 rotate via the gears 17 and 21 and the gears 19 and 23, respectively.

The indexing of each processing tool 9, 13 is as follows.
Indexing angle of the conventional octagonal turret type tool post (45
22.5 °, which is half of the angle (°), and the indexing is performed by the following configuration. First, there is a drive motor 31 for indexing, and an output shaft 31 of this drive motor 31.
A gear 33 is fixed to a. A gear 37 fixed to a shaft 35 meshes with the gear 33. A gear 41 fixed to a shaft 39 meshes with the gear 37. A gear 43 is coaxially fixed to the shaft 39. On the other hand, a hollow rotating body 45 is arranged on the outer peripheral side of the shaft 15, one end of the hollow rotating body 15 is connected to the octagonal turrets 1a, 1b side, and the other end has a gear 47. Is stuck. The gear 43 described above is meshed with the gear 47. Therefore, by rotating the drive motor 31, the gear 3
The octagonal turrets 1a, 1b can be rotated via the 3, 41, 43, 47 and the hollow rotator 45, thereby performing the desired indexing.

According to this embodiment, the following effects can be obtained. First, the number of attachable tools 9, 13 can be increased without increasing the size of the turret type tool rest 1. This is because the conventional octagonal turrets 1a and 1b are arranged in series in the axial direction, and they are placed at 22.5 °.
This is because they are integrated in a state of being shifted in the rotational direction. Further, since the diameter of the turret type tool rest 1 is not increased, the inertial load is not significantly increased, and therefore the indexing device need not be increased in size. Further, even if the configuration for rotating the rotary tools 9 and 13 is seen, the gears 17,
Since it is not necessary to change the number of teeth of 19, 21, 23, the rotary tool unit can be made common. Therefore,
The rotary tool unit attached to the conventional octagonal turret tool post can be used as it is. Further, as shown in FIG. 8, the adjacent machining tools 9 and 13 are
It is no longer necessary to consider interference with.

The present invention is not limited to the above-mentioned embodiment. For example, in the above-mentioned one embodiment, a structure in which octagonal turrets are stacked in the axial direction is shown.
A configuration in which angular-diameter turrets are stacked in the axial direction is also conceivable, and the number of angles is not limited. Also, the number of turrets to be overlapped is not limited, and the indexing angle may be arbitrarily determined accordingly.

[0018]

As described in detail above, according to the turret type tool rest of the automatic lathe according to the present invention, a polygonal type turret provided with an arbitrary number of machining tool mounting surfaces is displaced by a predetermined angle in the rotational direction. Since it is arranged in series in the axial direction to form a turret type tool post for an automatic lathe, it can be used while avoiding an increase in the size of the turret type tool post itself, an increase in the size of the indexing device, and non-common use of rotary tool units. It is possible to increase the number of processing tools that can be used, and thus it is possible to easily cope with recent automatic lathes that perform complicated processing.

[Brief description of drawings]

FIG. 1 is a front view of a turret type tool post in a state in which a tool holder and a machining tool are attached, showing an embodiment of the present invention.

FIG. 2 is a top view of the turret type tool post with the tool holder and the machining tool removed, showing an embodiment of the present invention.

FIG. 3 is a front view of a turret type tool post with a tool holder and a machining tool removed, showing an embodiment of the present invention.

FIG. 4 is a view showing an embodiment of the present invention, showing a mechanism for rotating a rotary tool and a mechanism for indexing.

FIG. 5 is a front view of an octagonal turret type tool rest in a state in which a tool holder and a processing tool are attached in a view showing a conventional example.

FIG. 6 is a front view of a hexagonal turret type tool post in a state in which a tool holder and a processing tool are attached in a view showing a conventional example.

FIG. 7 is a view showing a conventional example and a view showing a mechanism for rotating a rotary tool.

FIG. 8 is a front view of an octagonal turret type tool post in a state in which a tool holder and a machining tool are attached, showing a conventional example.

[Explanation of symbols]

 1 Turret type turret 1a Octagonal turret 1b Octagonal turret 3 Machining tool mounting surface 5 Machining tool mounting surface 7 Tool holder 9 Machining tool 11 Tool holder 13 Machining tool 15 Shaft 17 Gear 19 Gear 21 Gear 23 gear

Claims (2)

[Claims] 1. A turret type tool post of an automatic lathe in which polygonal type turrets each having an arbitrary number of machining tool mounting surfaces are arranged in series in the axial direction while being shifted by a predetermined angle in the rotational direction. 2. The turret type tool rest of the automatic lathe according to claim 1, wherein the polygonal type turret is an octagonal type turret, and the octagonal type turret is shifted by 22.5 ° in a rotational direction. Turret type turret for automatic lathes arranged in series.