JPH06246514A - Automatic lathe - Google Patents

Abstract

PURPOSE:To facilitate tool exchange to a preliminary tool and selection of machining tool for the next process with a simple constitution and in a short time by changing-over plural tools mounted on the tool mounting surface of a turret rest, by aid of utilizing the movement control function of a turret rest. CONSTITUTION:A headstock 3 is installed on a base 1, and it is driven in a Z-axis direction by a servo-motor 5. On the headstock 3, a main spindle 4 is mounted, ahead of with a guide bush device 7 is mounted. Consequently, both ends of a work 6 are supported. On the base 1, is installed a slide base 9 which is driven in an X-axis direction by a servo-motor 11. On the slide base 11, is mounted a turret rest 13 whose movement is controlled in Y-axis direction by the servo-motor 15. In this case, plural tool mounting surfaces 19 are formed. On the outside of a turret 14 rotatingly-mounted on the turret rest 13, and mounting holes 21 for plural tools 23 are formed in the tool mounting surfaces 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic lathe, and in particular,
When equipped with one or more turret turrets and capable of controlling movement of at least one turret turret in the Y-axis direction (direction perpendicular to the base), the movement control function in the Y-axis direction The present invention relates to a turret tool post configured to switch a plurality of tools mounted on an arbitrary tool mounting surface of the turret tool post.

[0002]

2. Description of the Related Art In an automatic lathe, for example, an ATC system (automatic tool change system) is employed in order to replace a new tool with a new tool according to wear or damage of the tool and continue machining. As such a device, for example, there is one shown in Japanese Patent Laid-Open No. 2-9502, which is shown in FIG. First, there is a turret turret 101, and this turret turret 101 has a plurality of tool mounting surfaces 103.
Are provided, and any fixed tool or rotary tool can be removably attached to the plurality of tool attachment surfaces 103. On the other hand, a tool magazine 105 is installed, and a plurality of tools are stored in this tool magazine 105. An automatic tool changer (ATC device) is provided between the tool magazine 105 and the turret tool post 101.
107 is installed, and this automatic tool changer 107
Is to replace an arbitrary tool of the turret tool post 101 with an arbitrary tool of the tool magazine 105.

There is also a system in which the tool is replaced by means other than the above ATC system. For this, the turret tool post is made large so that multiple positions can be indexed, and empty positions are provided in advance. Then, install a spare tool in this empty position,
If necessary, this spare tool will be replaced and processing will continue.

[0004]

The above-mentioned conventional structure has the following problems. First, in the case of the ATC system, there is a problem that the device basically becomes large and a large installation space is required. Further, there is a problem that each tool or tool holder must have a shape capable of automatic replacement in order to replace the tool by the ATC system. On the other hand, if the turret turret is large enough to index multiple positions, the turret rotation / replacement for changing to the next machining tool during machining
There has been a problem that the indexing operation requires a long time, which results in a long processing time and a reduction in productivity. This is because the turret is large, and
This is because the spare tool has to be skipped during the process to rotate and index.

The present invention has been made on the basis of such a point, and its object is to have a relatively simple and small structure and shorten the machining time by switching the tools in a short time. Consequently, it is to provide an automatic lathe capable of improving productivity.

[0006]

In order to achieve the above object, an automatic lathe according to the present invention is provided with one or a plurality of turret turrets, and at least one turret turret is vertical to the base. In an automatic lathe configured to control movement in an axial direction, a plurality of tools are attached to an arbitrary tool attachment surface out of an arbitrary number of tool attachment surfaces provided on the at least one turret tool post, and the turret It is characterized in that the plurality of tools are switched by controlling the movement of the tool rest in the Y-axis direction. At that time, using multiple tools as the same tool, the turret tool post is moved in the Y-axis direction based on any conditions such as the number of pieces to be machined, machining time, damage / wear detection, etc. It is possible to do it. Further, it is conceivable that a plurality of tools are used as different tools and the turret tool post is moved in the Y-axis direction to sequentially switch the different tools to perform different machining sequentially.

[0007]

In the case of the present invention, the Y-axis control of the turret tool post mounted so that the movement of the turret can be controlled in the Y-axis direction is utilized.
It has a simple structure and is configured to switch tools in a short time. That is, a plurality of tools are attached to an arbitrary tool attachment surface (may be the entire tool attachment surface or a part of the tool attachment surfaces) of at least one Y-axis controllable turret tool post. Then, switching of these tools is performed by the movement control in the Y-axis direction. The plurality of tools may be the same tool or different tools.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. The automatic lathe according to this embodiment has a structure as shown in FIGS. First, there is a base 1, and a headstock 3 is installed on the base 1. The headstock 3 is adapted to move on the base 1 in the Z-axis direction by a servomotor 5. In addition, a spindle 4 is attached to the headstock 3.
Is rotatably attached, and a work (shown by an imaginary line in the drawing) 6 is gripped by the main spindle 4. Headstock 3 above
A guide bush device 7 is installed in front of the guide bush device 7, and the tip end portion of the work 6 is supported by the guide bush device 7.

A slide base 9 is arranged on the base 1, and the slide base 9 is used as the servo motor 1.
1 moves in the X-axis direction orthogonal to the Z-axis. A turret tool post 13 is attached to the slide base 9, and the turret tool post 13 is attached.
Is driven by the servomotor 15 and the ball screw / ball nut mechanism 17 in the Y-axis direction (base 1
It is configured to move in the vertical direction). As a means for controlling the movement of the turret tool post 13 in the Y-axis direction, there is, for example, that disclosed in Japanese Patent Laid-Open No. 62-282801, which makes it possible to easily perform special processing.

The turret tool post 13 has a turret 14 attached to it.
Is rotatably mounted, and a plurality of (six in the case of this embodiment) tool mounting surfaces 19 are formed on the outer side of the turret 14. Three
As shown in Fig. 2, two tool mounting holes 21 and 21 'are formed. Then, the above two tool mounting holes 21, 21 '
As shown in FIGS. 1, 2 and 4, the same tool 2
3, 23 'and tools 24, 24' are detachably attached. That is, the same tool 2 is mounted on the same tool mounting surface 19.
By attaching two 3, 23 '(24, 24') and appropriately controlling the movement of the turret tool post 13 in the Y-axis direction, it is possible to continue the machining while appropriately switching between them.

In the case of this embodiment, the tools 23,
23 '(24, 24') is provided with a counter for individually counting the number of processed pieces (the number of processed workpieces) by them, and for example, the number of processed pieces is first calculated by the tool 23. When the value reaches a preset value, it is confirmed by the signal from the corresponding counter, and the turret tool post 13 is moved in the Y-axis direction by a certain amount (indicated by symbol a in FIG. 3), and Tool 2
It is controlled to switch to 3'and continue machining. For the sake of explanation, the counter for the tool 23 will be referred to as the first counter, and the counter for the tool 23 'will be referred to as the second counter.

The operation will be described based on the above configuration. That is, as shown in the flow chart of FIG. 5, first, the program starts to start machining with the tool 23 (sequence S1). The number processed by the tool 23 is counted by the first counter. Next, it is determined whether or not the count value of the second counter has reached a preset value (sequence S2). If the count value of the second counter has reached a preset value, the tool 23
Even if the machining by is finished, the tool 23 'cannot be switched to, so the process is stopped (sequence S3). This is because the tool 23 'has already machined a predetermined number of pieces and needs to be replaced with a new identical tool. On the contrary,
If the count value of the second counter has not reached the preset value, it is determined whether the count value of the first counter has reached the preset value (sequence S).
4).

When the count value of the first counter has not reached the preset value, the process returns to the sequence S1 and the machining by the tool 23 is continued. On the other hand, if the count value of the first counter has reached a preset value,
The process moves to sequence S5, and it is determined whether or not the count value of the second counter is "0". If the count value of the second counter is not "0", the process returns to the sequence S1 and the tool 2
Continue processing according to 3. On the other hand, when the count value of the second counter is 0, the process proceeds to sequence S6 and the tool is replaced. That is, the turret tool post 13
Is moved in the Y-axis direction by a certain amount (a) to position the tool 23 'at a predetermined machining position. Then, the process returns to the sequence S1 and is processed by the tool 23 '. Next, the process proceeds to sequence S2, it is determined whether or not the count value of the second counter has reached a preset value, and if it has reached, the process proceeds to sequence S3 and stops. become.

According to this embodiment, the following effects can be obtained. First, it has become easy to switch tools, and it has become possible to switch tools in an extremely short time. The same tools 23 and 23 'are attached to the tool attachment surface 19 of the turret 14 of the turret tool post 13,
This is because when switching between these same tools 23, 23 ', the turret tool post 13 need only be moved by a predetermined amount (a) in the Y-axis direction. And
It does not require a large-scale configuration like the conventional ATC system, and does not cause a problem that it takes a long time to replace a tool like a large turret tool post capable of multi-position indexing. . By shortening the time required for switching the tool in this way, the processing time itself is shortened, and thereby the productivity can be improved.

Next, a second embodiment will be described with reference to FIG. In the case of this embodiment, one tool mounting hole is formed in each mounting surface 19 of the turret 14 of the turret tool post 13 (only the tool mounting hole 21 ″), and instead, the same tool holder 25 is used. The tools 23 and 23 'are attached, so that the same effect as in the case of the first embodiment can be obtained.

Next, a third embodiment will be described with reference to FIG. In the case of this embodiment, different tools 23 and 24 are attached to the tool attachment surface 19 of the turret 14 of the turret tool post 13, and the same tools 23 and 24 are attached to different adjacent tool attachment surfaces 19. The tools 23 'and 24' are attached. Then, the machining by the tool 23 and the subsequent machining by the tool 24 are set as normal operations. In that case, the turret tool post 13 is moved in the Y-axis direction by a predetermined amount (a), so that the tool 23 and the tool 24 is switched. When the tools 23 and 24 'are replaced with the same type of tool, the turret 14 of the turret tool post 13 is swiveled for indexing. Therefore, also in this case, the same effect as that of each of the above-described embodiments can be obtained.

The present invention is not limited to the above embodiments. For example, the number of turret turrets is arbitrary, and how many turret turrets are configured to be capable of Y-axis control is also arbitrary. Further, the number and types of tools attached to the tool attachment surface of the turret tool post may be set appropriately. The configuration of the automatic lathe is shown in Fig. 1.
The present invention is not limited to the one shown in FIG. 2 and can be applied to automatic lathes having various configurations such as one having an opposed headstock and one having another tool rest. In addition, in the above-described embodiment, the conditions for switching the tools 23 and 23 'include, in addition to the number of pieces to be machined, machining time, detection of tool wear / damage, and dimension of a machined work (for example, machining error is It may be switched under any condition such as replacement when the size becomes larger).

[0018]

As described in detail above, according to the automatic lathe according to the present invention, the same turret tool post can be used by utilizing the Y-axis movement control function of the turret tool post mounted so as to be controllable in the Y-axis direction. Since it is configured to switch a plurality of tools mounted on the tool mounting surface, it is possible to easily switch to a spare tool and select a machining tool for the next process in a short time with a simple configuration. It was Therefore, a large-scale device and a large installation space are not required, and productivity can be improved by shortening the processing time.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an automatic lathe in the first embodiment of the present invention.

FIG. 2 is a front view of the automatic lathe, showing the first embodiment of the present invention.

FIG. 3 is a view showing a first embodiment of the present invention and is a view showing a state of a tool mounting surface of a turret tool post.

FIG. 4 is a view showing a first embodiment of the present invention and is a view for explaining a tool attached to a turret tool post.

FIG. 5 is a flowchart showing a first embodiment of the present invention.

FIG. 6 is a view showing a second embodiment of the present invention and is a view for explaining a tool attached to the turret tool post.

FIG. 7 is a view showing a third embodiment of the present invention and is a view for explaining a tool attached to a turret tool post.

FIG. 8 is a perspective view showing a configuration of an automatic lathe, showing a conventional example.

[Explanation of symbols]

1 base 13 turret turret 14 turret 15 turret servo motor for moving and controlling the turret turret 19 knives mounting surface 23 knives 23 'knives 24 knives 24' knives

Claims (3)

[Claims] 1. An automatic lathe comprising one or a plurality of turret turrets and configured to control movement of at least one turret turret in a Y-axis direction vertical to a base. A plurality of tools are mounted on an arbitrary tool mounting surface out of an arbitrary number of tool mounting surfaces provided on one turret tool post, and the plurality of tools are controlled by moving the turret tool post in the Y-axis direction. The automatic lathe is characterized in that it is adapted to switch between. 2. The automatic lathe according to claim 1, wherein the plurality of tools are the same tool, and the turret tool post is set to the Y-axis based on an arbitrary condition such as the number of pieces to be machined, machining time, and damage / wear detection. The automatic lathe is characterized in that the machining is continued by appropriately controlling the movement in the direction. 3. The automatic lathe according to claim 1, wherein the plurality of tools are different tools, and the turret tool post is controlled to move in the Y-axis direction so that the different tools are sequentially switched to perform different machining. An automatic lathe characterized by