JPH06312301A - Turret tool post of numerically controlled lathe - Google Patents

Abstract

PURPOSE:To reduce the space and to simlify the program, by providing a handling device to grasp a work to plural tool holder installing surfaces of a turret, and providing a motive power feeding device to open and close a pair of claws of the handling device to the turret. CONSTITUTION:In a turret tool post, a turret 6 of a polyhedron form is fixed to a dividing shaft held to the turret tool post, and plural tool holders are fixed to the tool holder installing surface on the outer periphery of the turret 6. In this case, on one of the tool holder installing surfaces, a handling device 75 which grasps and collects a work 60 after machining chucked on the main spindle is provided. This handling device 75 has a pair of claws 76 and 77 opened and closed by an actuator, and it is provided to communicate the fluid passages 78A and 78B of the device main body to the fluid passages 30A and 30B of the turret 6. Consequently, it is not necessary to provide a moving means to move the handling device 75, and the space can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turret tool rest of a numerically controlled lathe, and particularly to a numerically controlled lathe that is operated unattended for a long time. The present invention relates to a turret tool post of a numerically controlled lathe equipped with a handling device such as.

[0002]

2. Description of the Related Art In order to operate a numerically controlled lathe for a long time unattended, various auxiliary means necessary for the unattended operation of the numerically controlled lathe,
For example, a work take-out device that automatically takes out a worked work is required.

Conventionally, the handling device used as the above-mentioned work take-out device is usually provided as an independent work take-out device, and has an independent drive shaft or drive means. Incidentally, Japanese Patent Laid-Open No. 59-169702 discloses an example in which a product receiving means is provided on a turret tool post along with a parting tool, but the product receiving means of the present invention simply supports a work. Only
The present invention is completely different from the work taking-out means which is composed of a handling device which surely chucks the work and conveys it to the work taking-out position as in the present invention.

[0004]

For long-term unmanned operation, in addition to the work take-out device, various auxiliary means (for example, a chip removing device) and detection means (for example, an automatic measuring device for measuring the work size, It is often necessary to measure the tool tip position, etc.), but in the prior art, little consideration was given to the combination and compatibility of these auxiliary means and detection means, mutual arrangement, etc. Since an independent device is provided at each position and each has its own moving mechanism, if various types of auxiliary means and detection means necessary for unmanned operation are attached, the inside of the lathe will be It is possible to create independent control programs for programs that control the position of the tool bit of the turret and various auxiliary means and detection means irrespective of each other due to congestion. Next, also various a command code used in these control programs, was cumbersome.

An object of the present invention is to reduce the space required by providing a handling device on the turret of a turret tool post of a conventional numerically controlled lathe to provide a work take-out device, which can be replaced with other auxiliary means or detection means. The purpose is to simplify the program.

[0006]

The structure of the present invention for achieving the above object is a turret blade of a numerically controlled lathe equipped with a turret having a plurality of tool holder mounting surfaces to which a plurality of tool holders can be mounted respectively. On the table
A handling device for chucking a work is provided on the tool holder mounting surface, and a power supply means for opening and closing a pair of claws of the handling device is provided on the turret.

[0007]

Since the handling device used as the work take-out device is provided on the tool holder mounting surface of the turret tool post, other auxiliary means (for example, a chip removing device) and detection means (for example, an automatic measuring device for the work size or Tool tip position measuring devices, etc.) can be installed with mutual compatibility,
In addition, a dedicated moving mechanism is not required, and space can be reduced. Further, since the fluid supply means or the power supply means is provided in the turret, it is possible to control the opening and closing of the pair of claws of the handling device simply by mounting and controlling by the arithmetic control means. Therefore, the program can also be operated by the arithmetic control means of the numerically controlled lathe, and the program can be simplified.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, an outline of the configuration of a known numerically controlled lathe will be described. The conventional numerical control lathe is 4-2
As disclosed in Japanese Patent No. 9482, it has a headstock that supports at least a rotating spindle, and a tool rest that moves relative to the headstock in a direction parallel to and perpendicular to the centerline of the spindle. The work held by the main shaft is cut by a tool held by a tool rest that moves relatively. The tool post is often a turret tool post, and usually has two or more tool posts that are driven and controlled independently of each other in order to alternately machine a workpiece. In addition to this, the numerically controlled lathe disclosed in Japanese Patent Publication No. 4-29482 has an opposite main spindle for back surface machining, but it does not matter in the present invention whether or not the opposite main spindle is provided.

An example of such a turret tool post is shown in FIG. The turret tool post 1 is moved by the Z-axis feed motor 2 in the Z-axis direction parallel to the center line of the main shaft (not shown), and the X-axis feed motor 3 moves the X-axis orthogonal to the Z-axis direction.
It can be moved axially. An indexing shaft 4 is rotatably indexed on the turret tool post 1, and the indexing shaft 4 is indexed by the A-axis rotary motor 5 in the A-axis direction. A turret 6 having an outer peripheral shape of a polyhedron is fixed to the indexing shaft 4, and a plurality of tool holders 8 are fixed to a tool holder mounting surface 7 on the outer circumference of the turret 6, as shown in FIGS. 1 and 2. ing. The tool holder mounting surface 7 is formed with tool holder holes 9 for positioning the tool holders. FIG. 1 shows a tool holder 8A having a bite 10A attached thereto and a tool holder 8B having a center drilling tool 10B such as a drill attached thereto,
FIG. 2 shows a tool holder 8C to which a rotary tool 10C for lateral drilling such as a drill and an end mill is attached.

As shown in FIG. 2, a rotary tool drive shaft 15 extending in the turret 6 is rotatably supported by the indexing shaft 4 on the turret tool post 1, and the rotary tool drive shaft 15 has a turret 6 inside. A rotary tool driving gear 16 is fixed to the portion of. The tool holder 8C includes a rotary tool holding portion 17 to which the rotary tool 10C is attached, a fixing portion 18 rotatably supporting the rotary tool holding portion 17 and fixed to the turret 6, and the rotary tool driving gear 16. And a driven gear 19 fixed to the rotary tool holding portion 17 so as to mesh with each other. An end plate 20 is fixed to the front end of the turret 6, and the rotary tool drive shaft 15 is rotatably supported by the end plate 20 via a bearing 21. The above configuration is almost the same as the well-known configuration of the turret tool post, so further description will be omitted.

As shown in FIG. 2, a swivel shaft 25 is fixed to the end plate 20, and two swivel shafts 25 are provided on the swivel shaft 25 as shown in FIGS. 2, 3, 5, and 6. Fluid hole 2
6A and 26B are formed. One end of the fluid hole 26A on the end plate 20 side is sealed with a plug 27, and the other fluid hole 26B is a blind hole.
It is made shorter. As shown in FIGS. 5 and 6,
An annular fluid passage 28A is formed in the outer peripheral portion of the swivel shaft 25 inserted into the inner diameter of the end plate 20.
The portion of the annular fluid passage 28A corresponding to 6A is communicated with the fluid hole 26A by the fluid passage 29A. Swivel axis 25
In the side surface portion that is pressed against the side surface of the end plate 20 of
An annular fluid passage 28B is formed, and a portion of the annular fluid passage 28B corresponding to the fluid hole 26B communicates with the fluid hole 26B by a fluid passage 29B.

On the other hand, on the tool holder mounting surface 7 of the turret 6, as shown in FIGS. 3 and 5 to 7, two fluid passages 30A and 30B are formed every other one. Fluid passages 31A, 31B and 32A, 32B are formed in the turret 6 and the end plate 20 so that 30A, 30B communicate with the annular fluid passages 28A, 28B, respectively. Here, the fluid passage 3
The tool holder mounting surface 7 of the turret 6 on which 0A and 30B are formed is hereinafter referred to as a detecting means mounting surface 7a for convenience of description. Of course, the tool holder 8 may be attached to the detecting means mounting surface 7a to which the detecting means to be described later is not mounted, or two fluid passages 30A and 30B may be provided on all the tool holder mounting surfaces 7 instead of every other one. It is needless to say that they may be formed, or every other two may be formed. As shown in FIG. 2 and FIG.
Curl tubes 33 are provided in the fluid holes 26A and 26B, respectively.
One end of A, 33B is connected, and the curl tube 33A,
The other end of 33B is connected to a hydraulic pump, a compressor, a vacuum pump, or the like, which is a hydraulic or pneumatic source, via a solenoid valve (not shown).

As shown in FIG. 2, a commercially available signal conversion circuit 40 is fixed to the swivel shaft 25, and an input side of the signal conversion circuit 40 is attached to a receptacle mounting plate 41 fixed to the swivel shaft 25. Mounted receptacles 4
Connected to 2. The output side of the signal conversion circuit 40 is connected to a receptacle 44 attached to a receptacle attachment plate 43 fixed to the swivel shaft 25.
A connector 46 attached to one end of the curl cord 45 is connected to 4. The other end of the curl cord 45 is connected to the control unit of the numerically controlled lathe. A cover 47 is fixed to the swivel shaft 25 so as to cover the signal conversion circuit 40, the curl tubes 33A and 33B, and the curl cord 45. Here, the rotation of the turret 6 is limited to one rotation or less, and the curl tubes 33A and 33B and the curl cord 4 are rotated.
Prevent twist of 5. Although the swivel shaft 25 is provided so as to project from the turret 6 in the above-mentioned embodiment, it may of course be provided so as to be buried inside the turret 6.

On one of the mounting surfaces 7a for the detecting means,
As shown in FIGS. 8 and 9, a handling device 75 that is chucked by a spindle (not shown) and is cut, and that grips and collects the work 60 after the completion of the work is attached. The pair of claws 7 of the handling device 75 of this embodiment
Reference numerals 6 and 77 are opened and closed by an actuator using hydraulic pressure or pneumatic pressure, and the configuration thereof is known as a robot hand or a manipulator, and therefore detailed description thereof will be omitted. The main body of the handling device 75 is provided with fluid passages 78A, 78B to which hydraulic pressure or pneumatic pressure is sent so as to communicate with the fluid passages 30A, 30B of the turret 6. The claws 76 and 77 of the handling device 75 can be chucked or slipped via rollers so that the workpiece held by the main shaft can be chucked before being cut off, and can be reliably chucked after cutting. It is made of a material with low friction. Numerical control lathe is specially fair 29-29
In the case of a lathe having a back spindle as disclosed in Japanese Patent No. 482, the back spindle is chucked with a back spindle (not shown), cut off, and then the back spindle is rotated. Stopping and handling device 75
And the claw 7 of the handling device 75
There is no need to make the 6, 7 7 special configuration.

From the hydraulic or pneumatic source, the curl tube 33
When hydraulic pressure or pneumatic pressure is supplied to A and 33B, the hydraulic pressure or pneumatic pressure is applied to the fluid holes 26A and 26B, the fluid passages 29A and 29B, and the annular fluid passages 28A and 28B provided in the swivel shaft 25.
Through the fluid passages 32A, 32B and 31A, 31B provided in the end plate 20 and the turret 6 from the fluid passages 30A, 30B.
5 to the fluid passages 78A and 78B, which causes the pawls 76 and 77 to open and close. Therefore, the work 6 after processing is completed
When 0 is taken out, the rod-shaped work piece chucked by the spindle is cut off by the tool held by another tool rest, and the work piece 60 is cut off before being clawed 76, 77.
In the open state, the turret 6 is moved to position the work 60 between the claws 76 and 77. Immediately before the work 60 is cut off by the tool, the hydraulic or pneumatic actuator is operated to close the pawls 76 and 77 and chuck the work 60. After the work 60 is cut off, the turret 6 is moved to be positioned above a work receiver (not shown), the pawls 76 and 77 are opened, and the work 60 is discharged to the work receiver.

In the above description, the handling device 7
Although the claws 76 and 77 of No. 5 have been described as being driven by a hydraulic or pneumatic actuator, they are configured to be opened and closed by a motor or an electromagnet, and the curl cord 45, the connector 46, the receptacle 44, the receptacle 42, and the connector 54.
It goes without saying that power may be supplied via the.

The handling device 75 of this embodiment can perform not only the above-described work discharging work but also the following auxiliary work. That is, in the case of machining a work over the axial stroke of the spindle, after the rod-shaped workpiece chucked on the spindle is machined for a certain length (length less than the spindle stroke), the pawls 76, 77 are used. The work is chucked, then the spindle chuck is released to retract the spindle, then the spindle chuck is closed to re-chuck the rod-shaped workpiece, and then the pawls 76 and 77 are opened to operate the handling device 75. It is also possible to retreat and process the remaining part again. When the bar is pulled out from the main shaft and processed, it can be pulled out in exactly the same way. Further, in the embodiment of the present invention, since the swivel shaft 25 fixed to the turret 6 is provided with the signal conversion device 40 and the receptacle 42, the handling device 75 may be provided with a chuck error detection mechanism or the like as necessary. Auxiliary functions can also be added easily.

[0018]

According to the present invention, in a turret tool post of a numerically controlled lathe equipped with a turret having a plurality of tool holder mounting surfaces on which a plurality of tool holders can be mounted, a handling device for chucking a work is described above. Since the turret is provided with fluid supply means provided on the tool holder mounting surface and for opening and closing the pair of claws of the handling device, there is no moving mechanism for moving the handling device, and space is reduced, and
The program for moving the handling device controls Z-axis and X-axis for moving the turret tool post, and the program can be simplified and moved with high accuracy.

[Brief description of drawings]

FIG. 1 is an external view showing a schematic configuration of an embodiment of a turret tool post of a numerically controlled lathe according to the present invention.

FIG. 2 is a cross-sectional view showing a main part of the present invention.

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

4 is a sectional view taken along the line BB in the cover of FIG.

5 is a sectional view taken along line CC of FIG.

6 is a cross-sectional view taken along the line DD of FIG.

FIG. 7 is a plan view of a tool holder mounting surface.

FIG. 8 is a front explanatory view of a main part of the present invention.

9 is a right side explanatory view of FIG. 8. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Turret tool post 6 Turret 7 Tool holder mounting surface 7a Detection means mounting surface 8, 8A, 8B Tool holder 10A, 10B, 10C Tool 20 End plate 25 Swivel axis 26A, 26B, 28A to 32A, 28B to 32B Fluid passage 33A , 33B Curl tube 40 Signal conversion circuit 42, 44 Receptacle 45 Curl cord 46 Connector 60 Workpiece 75 Handling device

Front page continuation (72) Inventor Akihide Kanaya 840 Shimotomi, Tokorozawa, Saitama Prefecture Citizen Watch Co., Ltd. Tokorozawa Office

Claims (1)

[Claims] 1. A turret tool post of a numerically controlled lathe equipped with a turret having a plurality of tool holder mounting surfaces on which a plurality of tool holders can be mounted, and a handling device for chucking a work is provided on the tool holder mounting surface. A turret tool post for a numerically controlled lathe, characterized in that power supply means for opening and closing a pair of claws of the handling device is provided in the turret.