JPH06126596A - Turret tool post of numerical control lathe - Google Patents

Abstract

PURPOSE:To facilitate the changing of a detecting means and/or an auxiliary means on a turret tool post with mutual interchangeability, and to miniaturize the turret tool post and to reduce the cost of the device. CONSTITUTION:In the turret tool post 1 of a numerical control lathe provided with a turret 6 having a plurality of tool holder attaching faces 7 to which a plurality of tool holders 8 is severally attached, the tool holder attaching face 7 is changeably provided with a detecting means 51 to issue a detecting signal and/or an auxiliary means driven by hydraulic pressure, and a turning shaft 25 is fixed to the turret 6, and fluid passages 26A, 26B, 28A, 28B are formed in the turning shaft 25 and the turret 6 so as to make the turning shaft 25 communicate with the tool holder attaching face 7. Fluid is supplied through the fluid passage of the tool holder attaching face 7 to the detecting means 51 and/or the driving section of the auxiliary means, and in addition, a receptacle 42 is attached to the turning shaft 25 through a signal wire, and a connector 54 on the output side of the detecting means 51 attached to the tool holder attaching face 7 is connected to the receptacle 42.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a turret tool post for a numerically controlled lathe.

[0002]

2. Description of the Related Art In order to operate a numerically controlled lathe for a long time unattended, various types of devices such as an automatic measuring device for a work size, an automatic inspection device for a tool state (damage, wear, etc.), an automatic detecting device for a cutting oil splash position, etc. Detection means, or work recovery device,
Various auxiliary means such as a chip removing device are required. Various types of these detecting means and auxiliary means have been developed and used.

In a numerically controlled lathe, for example, Japanese Patent Publication No. 4
No. 29482, Japanese Patent Laid-Open No. 100803/1990,
As disclosed in Japanese Patent Application Laid-Open No. 4-171104, at least a spindle for gripping and rotating a workpiece and a tool rest for machining the workpiece are provided. It is installed independently of the turret,
No consideration is given to mutual compatibility. Therefore, even if the work collecting device becomes unnecessary due to a change in the type of work to be processed and the chip removing device becomes necessary instead, it is not possible to install the chip removing device in place of the work collecting device. It is possible, and the work collecting device which is an auxiliary means which is not used is still attached, or the work collecting device which is no longer used is removed and a chip removing device to be used newly is attached to another position.

[0004]

SUMMARY OF THE INVENTION In the above-mentioned prior art, when the numerical control lathe is operated with all the various detecting means or auxiliary means attached, the setup change for these detecting means or auxiliary means is required. Work becomes difficult.
Also, once remove the unnecessary parts of the detection means or auxiliary means,
When mounting a newly required detecting means or auxiliary means, as described above, they are not compatible with each other, and no special consideration is given to the setup workability of attachment / detachment, which requires a great deal of setup work time. . Further, since the detecting means or the auxiliary means is installed independently of the spindle and the tool rest, it becomes bulky and expensive.

An object of the present invention is to make it possible to easily replace the turret tool post of a conventional numerically controlled lathe with detection means and / or auxiliary means, and to reduce the size and cost of the apparatus. Is to try.

[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
Detecting means for outputting a detection signal and / or auxiliary means driven by fluid pressure are provided on the tool holder mounting surface so as to be replaceable, the turning shaft is fixed to the turret, and the turning shaft and the turret are connected to the tool from the turning shaft. A fluid passage is formed so as to communicate with the holder mounting surface, and the fluid can be supplied from the fluid passage on the tool holder mounting surface to the drive unit of the detection means and / or the auxiliary means, and further via a signal line to the swivel shaft. And a receptacle on the output side of the detection means mounted on the tool holder mounting surface can be connected to the receptacle.

[0007]

The tool holder, the detecting means, and the auxiliary means can be attached to the tool holder mounting surface of the turret tool post with compatibility with each other. Therefore, any tool holder, detecting means, and auxiliary means can be mounted as necessary. Etc. can be installed. The turret and the swivel shaft fixed to the turret are provided with fluid passages so that the fluid can be supplied to the inspection means mounting surface. Air blow,
Alternatively, auxiliary means can be activated. Also, since a receptacle that serves as a signal line is attached to the turret side of the swivel axis, electrical signals can be transmitted simply by connecting the output side connector of the detecting means to the receptacle and attaching the detecting means to the tool holder mounting surface. it can.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, the outline of a known configuration will be described. As shown in FIG. 1, the turret tool post 1 is moved by a Z-axis feed motor 2 in the Z-axis direction parallel to the center line of a main shaft (not shown) or a back main shaft, and the X-axis feed motor 3 is moved.
Is moved in the X-axis direction orthogonal to the Z-axis direction. An indexing shaft 4 is rotatably supported on the turret tool post 1, and the indexing shaft 4 is rotated in the A-axis direction by an A-axis rotation motor 5. A turret 6 having an outer periphery of a polyhedron is fixed to the indexing shaft 4, and a tool holder mounting surface 7 on the outer periphery of the turret 6 has a
As shown in FIG. 2, a plurality of tool holders 8 are fixed. Tool holder holes 9 are formed in the tool holder mounting surfaces 7, respectively. FIG. 1 shows a tool holder 8A having a bite 10A attached thereto and a tool holder 8B having a center support tool 10B attached thereto, and FIG. 2 shows a tool holder 8C having a rotary tool 10C such as a drill or end mill attached thereto.

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. A distributor 20 is fixed to the front end of the turret 6, and the rotary tool drive shaft 15 is rotatably supported by the distributor 20 via a bearing 21. The above configuration is almost the same as the configuration disclosed in the publications cited in the section of the prior art, and therefore further description is omitted.

As shown in FIG. 2, the distributor 2
The swivel shaft 25 is fixed to 0, and the swivel shaft 25 has two fluid holes 26A and 26B as shown in FIGS. 2, 3, 5, and 6. One fluid hole 2
The end of 6A on the distributor 20 side is sealed with a plug 27, and the other fluid hole 26B is a blind hole, which is shorter than the fluid hole 26A. 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 distributor 20, and an annular fluid passage 28A corresponding to the fluid hole 26A is The fluid passage 29A communicates with the fluid hole 26A. An annular fluid passage 28B is formed in a side surface portion of the swivel shaft 25 that is pressed against the side surface of the distributor 20,
A portion of the annular fluid passage 28B corresponding to the fluid hole 26B communicates with the fluid hole 26B through the fluid passage 29B.
On the other hand, on the tool holder mounting surface 7 of the turret 6, as shown in FIG. 3 and FIGS.
Individual fluid passages 30A and 30B are formed, and the fluid passages 30A and 30B are respectively the annular fluid passages 28.
Fluid passages 31A, 31B and 32 are provided in the turret 6 and the distributor 20 so as to communicate with A and 28B.
A and 32B are formed. Here, the fluid passage 30
For convenience of description, the tool holder mounting surface 7 of the turret 6 on which A and 30B are formed will be described below.
Let's call it a. Of course, the tool holder 8 is attached to the detecting means mounting surface 7a on which the detecting means described later is not mounted.
Needless to say, can be attached. Swivel axis 2
5 includes fluid holes 26A, 2A and 2A as shown in FIGS.
One end of each of the curl tubes 33A and 33B is connected to 6B, and the other end of the curl tubes 33A and 33B is connected to a hydraulic or pneumatic actuator, a compressor, a vacuum pump, or the like.

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 a receptacle mounting plate 41 fixed to the swivel shaft 25. It is connected to a plurality of mounted receptacles 42. 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, and a connector 46 attached to one end of the curl cord 45 is connected to the receptacle 44. 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 turret 6 is rotated within one rotation to prevent the curl tubes 33A and 33B and the curl cord 45 from being twisted. 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.

Next, a first application example of the turret tool post 1 having the above-described structure will be described with reference to FIGS. 8 and 9 with reference to FIGS. This embodiment shows an example in which a tool wear inspection device 51 is attached to one of the detection means attachment surfaces 7a when measuring a tool 50 attached to a tool rest (not shown). On the output side of the tool wear inspection device 51,
It has a cable guide 52 inserted into the tool holder hole 9 of the turret 6 and connects a connector 54 attached to the end of the cable 53 to a receptacle 42 attached to the receptacle attachment plate 41. Then, the signal conversion circuit 40
The curl cord 45 is connected to the control section of the numerically controlled lathe. The tool wear inspection device 51 includes a sensor terminal 5
5 are provided. The curl tube 33A is connected to a compressed air source such as a compressor via a solenoid valve (not shown).

The tool wear inspection device 51 is used for the tool 50.
When measuring wear and chipping of the
The tool wear etc. inspection device 51 is indexed to a predetermined position by rotating in the axial direction and moved in the X-axis direction and the Z-axis direction to position the sensor terminal 55 of the tool wear etc. inspection device 51 at the predetermined position. On the other hand, the tool 50 attached to a tool post (not shown) moves to a predetermined position and stops, and the sensor terminal 55 of the tool wear inspection device 51 moves forward to move the tool 5
Contact a predetermined position of 0 and measure the dimension (coordinate) of the position. The electrical signal generated by the measurement by the sensor terminal 55 is sent from the receptacle 42 to the signal conversion circuit 40 through the cable 53, is converted from the parallel signal to the serial signal by the signal conversion circuit 40, and the curl code 4
5 to the control unit. The control unit performs a predetermined arithmetic processing and compares it with the reference data to determine the dimension of the measurement point. Accordingly, when the tool 50 is set, the blade tip position of the tool 50 can be measured in three directions, and the tool can be measured according to the blade tip position. Further, while the numerically controlled lathe is in operation, it is possible to measure the blade edge position at a predetermined interval, detect friction and breakage of the tool 50, and determine the life of the tool.

Compressed air is fed into the curl tube 33A into the groove measured by the tool wear inspection device 51, and the fluid hole 26A and the fluid passage 29 provided in the swivel shaft 25 are provided.
A, a fluid passage 32A provided through the annular fluid passage 28A and further provided in the distributor 20 and the turret 6.
Compressed air is supplied from the fluid passage 30A to the tool wear inspection device 51 through 31A and 31A, and air is blown from the nozzle 56 to the blade tip position of the tool that contacts the sensor terminal 55. As a result, the chips, cutting fluid, etc. adhering to the tool 50 are removed and cleaned, and the measurement accuracy is improved.

10 and 11 show a second application example. The present embodiment shows an example in which a workpiece inspection device 61 is attached to one of the attachment surfaces 7a of the detection means or the like when measuring the outer diameter of the workpiece 60 chucked by a spindle or a back spindle not shown. The work inspection device 61 has a sensor terminal 62 and a sensor 63 on the input side, and the work inspection device 6 has an output side inserted into the tool holder hole 9 of the turret 6 as in the first application example. Cable guide 52 and cable 53
And a connector 54 attached to the receptacle 42.

Therefore, also in the case of this embodiment, the connector 54 is attached to the receptacle 42 and compressed air is sent to the curl cord 45 for use, as in the first application example. Thereby, similarly to the first application example, the sensor terminal 62 can be brought into contact with the work 60 to measure the work outer diameter dimension. By using the work inspection device 61 in which the type of the sensor 63 and the direction of the sensor terminal 62 are changed, it is needless to say that the work inner diameter dimension and the work longitudinal dimension can be measured.

12 and 13 show a third application example. In this embodiment, the cutting oil supply pipe 70 is used to detect whether or not the cutting oil 71 is correctly applied to a predetermined position of the work 60, and the cutting oil inspection device 72 is mounted on one of the mounting surfaces 7a such as the detection means. Here is an example. Cutting oil inspection device 72
Has a well-known vibration sensor 73, and in the case of the present embodiment, the vibration sensor 73 is operated in the same manner as in the above-described application examples, and
It is located near 0 and detected. In addition, cutting oil inspection device 7
2 has a cable guide 52, a cable 53, and a connector 54, like the above-described application examples, and the connector 54 is attached to the receptacle 42 for use. In the case of this embodiment,
Since it is not necessary to send compressed air into the curl tubes 33A and 33B, the cutting oil inspection device 72 uses the fluid passage 30
It may be mounted on the tool holder mounting surface 7 where A and 30B are not provided. When the cutting oil 71 is correctly applied to the vibration sensor 73, the vibration sensor 73 vibrates, so that it is possible to detect whether or not the cutting oil 71 is correctly applied to the predetermined position of the workpiece 60.

14 and 15 show a fourth application example. The present embodiment is a case of collecting the work 60 after processing is completed.
An example is shown in which a handling device 75 having a known structure is attached to one of the attachment surfaces 7a of the detection means and the like. The pair of claws 76, 77 of the handling device 75 of the present embodiment is opened and closed by an actuator by hydraulic pressure or pneumatic pressure, and the handling device 75 has fluid passages 78A, 78B for sending hydraulic pressure or pneumatic pressure in the turret 6. Fluid passage 30A,
It is provided so as to communicate with 30B. 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.
In the case where the numerically controlled lathe is a lathe having a back spindle as disclosed in Japanese Examined Patent Publication No. 4-29482, parting is performed after chucking a workpiece with a back spindle (not shown), and then the back. If the rotation of the main shaft is stopped and the handling device 75 discharges the claws 76 and 77 of the handling device 75, it is not necessary to have a special structure.

From the hydraulic or pneumatic source to 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 distributor 20 and turret 6
Fluid passages 32A, 32B and 31A, 31 provided in the
It is sent to the fluid passages 78A and 78B of the handling device 75 from the fluid passages 30A and 30B through B, whereby the pawls 76 and 77 are opened and closed. Therefore, when the work 60 is taken out, the bar-shaped workpiece chucked by the main shaft is cut off by the tool and the work 60 is cut off, and the turret 6 is moved by moving the turret 6 with the pawls 76 and 77 open. , 77 between the workpieces 60 and 77. Then, before the work 60 is cut off by the tool, the hydraulic or pneumatic actuator is operated to close the claws 76 and 77 and chuck the work 60. After the work 60 is cut off, the turret 6 is moved and positioned above the work receiver, and the pawls 76 and 77 are opened to open the work 60.
Is discharged to the work receiver.

In this embodiment, not only the above-described work discharging work but also the following auxiliary work can be performed. When machining a workpiece 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 pawl 7
The work is chucked at 6, 77, then the spindle chuck is opened to retract the spindle, then the spindle chuck is closed to chuck the rod-shaped workpiece again, and then the handling device 75 is retracted again. The remaining part can be processed.

16 and 17 show the tool holder mounting surface 7
An example in which a chip removing device 81 having a chip guide plate 80 is attached is shown in FIG. Therefore, the turret 6 is moved in the A-axis, X-axis, and Z-axis directions by the same operation as in each of the above-described application examples to position the chip guide plate 80 near the workpiece 60 machined by the tool 50. As a result, the cutting chips 82 flow along the cutting chip guide plate 80 and the flow direction of the cutting chips 82 changes, so that the cutting chips 82 are prevented from being entangled with the work 60.

As described above, on the tool holder mounting surface 7 of the turret tool post 1, the tool holder 8, the tool wear / inspection device 51 as the detection means, the work inspection device 61, the vibration sensor device 70, and the handling as the auxiliary means. Device 75,
Since the chip removing device 81 and the like can be attached so as to be compatible with each other, for example, when the handling device 75 is unnecessary and the chip removing device 81 is needed instead, the chip removing device 81 is not required. Can be installed. If the handling device 75 and the chip removing device 81 are unnecessary, the tool holder 8 may be attached.

The turret 6 and the swivel shaft 25 fixed to the turret 6 are provided with fluid passages 26A, 26B, 28A to 26A, 26B, 28A so that the fluid can be supplied to the mounting surface 7a for the inspection means.
Since 32A and 28B to 32B are provided, the measuring unit can be air blown 57 or the auxiliary means can be operated only by attaching the above-mentioned detecting means or auxiliary means to the mounting surface 7a such as the inspection means. In addition, the turret 6 of the turning shaft 25
Since the receptacle 42 serving as a signal line is attached to the side, the connector 54 on the output side of the detection means is connected to the receptacle 4
The electrical signal can be transmitted only by connecting the detecting means to the tool holder attaching surface 7 by connecting the detecting means to the tool holder 2.

[0024]

According to the present invention, the detection means for outputting a detection signal and / or the auxiliary means driven by the fluid pressure are provided on the tool holder mounting surface so as to be interchangeable with each other, and the pivot shaft is fixed to the turret. A fluid passage is formed in the swivel shaft and the turret so that the swivel shaft communicates with the tool holder mounting surface, and the fluid can be supplied from the fluid passage on the tool holder mounting surface to the drive unit of the detection means and / or the auxiliary means. In addition, a receptacle that serves as a signal line is attached to the swivel axis, and the output side connector of the detection means attached to the tool holder mounting surface can be connected to the receptacle, so that it can be attached to the turret tool post of a conventional numerically controlled lathe. The detecting means and / or the auxiliary means are compatible with each other and can be easily exchanged, and the size and cost of the apparatus can be reduced.

[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 side view illustrating a first application example.

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

FIG. 10 is a side view illustrating a second application example.

11 is a right side explanatory view of FIG.

FIG. 12 is a side view illustrating a third application example.

13 is a right side explanatory view of FIG.

FIG. 14 is a side view illustrating a fourth application example.

15 is a right side explanatory view of FIG. 14. FIG.

FIG. 16 is a side view illustrating a case where a chip removing device is attached to the tool holder attachment surface.

17 is a right side explanatory view of FIG. 16. FIG.

[Explanation of symbols]

1 Turret Turret 6 Turret 7 Tool Holder Mounting Surface 7a Detection Means Mounting Surface 8, 8A, 8B Tool Holder 10A Bit 10B Center Support Tool 10C Rotating Tool 20 Distributor 25 Swivel Axis 26A, 26B, 28A to 32A, 28B to 32B Fluid Passage 33A, 33B Curl tube 40 Signal conversion circuit 42, 44 Receptor 45 Curl cord 46 Connector 50 Tool 51 Tool wear inspection device 54 Connector 57 Air blow 60 Work 61 Work inspection device 71 Cutting oil 72 Cutting oil inspection device 75 Handling device 81 Off Powder removal device 82 Chips

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[Procedure amendment]

[Submission date] October 21, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

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[Procedure amendment]

[Submission date] December 28, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

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[Document name] Statement

[Title of Invention] Turret Turret for Numerically Controlled Lathe

[Claims]

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a turret tool post for a numerically controlled lathe.

[0002]

2. Description of the Related Art In order to operate a numerically controlled lathe for a long time unattended, various types of devices such as an automatic measuring device for a work size, an automatic inspection device for a tool state (damage, wear, etc.), an automatic detecting device for a cutting oil splash position, etc. Detection means, or work recovery device,
Various auxiliary means such as a chip removing device are required. Various types of these detecting means and auxiliary means have been developed and used.

In a numerically controlled lathe, for example, Japanese Patent Publication No. 4
No. 29482, Japanese Patent Laid-Open No. 2-100803,
As shown in Japanese Unexamined Patent Publication No. 4-171104, it is essential to have at least a spindle that grips and rotates a workpiece and a tool rest that holds a tool for machining the workpiece.
However, conventionally, the above-mentioned detecting means or auxiliary means is usually installed independently of the spindle and the tool rest,
An example in which these detecting means or auxiliary means are installed on the turret tool post, and an example in which a product receiving means is provided together with a parting tool in JP-A-59-169702,
Japanese Unexamined Patent Publication No. 61-86102 discloses that a special tool holder mounting surface of a turret tool post has a rear surface processing device, a component holder,
Japanese Patent Laid-Open No. 62-130156 discloses an example in which an automatic measuring device for a workpiece is provided, which is provided with a drive source such as a rotation center and a steady rest, and a large-scale work auxiliary tool that does not require signal transmission / reception. However, these are also large in size and cannot be mounted by only one surface of the tool holder mounting surface, or are completely incompatible with other types of detecting means or auxiliary means. It has not been taken into consideration. Therefore, even if the work collection device is no longer necessary due to changes in the type of work to be processed, and a work size measurement device is needed instead, a work size measurement device should be installed instead of the work collection device. Is usually impossible, leave the work collection device that is not used as an auxiliary means all attached, or remove the work collection device that is no longer used and install a new work size measurement device at another position. Was there.

[0004]

In the above-mentioned prior art, when the numerical control lathe is operated with all of the various detecting means or auxiliary means described above attached, these detecting means or auxiliary means are attached. As a result, the space inside the numerically controlled lathe becomes narrower, and there is no space for setup change, which makes work such as setup change difficult. In addition, when the unnecessary detecting means or auxiliary means is temporarily removed and a newly required detecting means or auxiliary means is attached, they are not compatible with each other as described above, and especially regarding the setup workability of attachment and detachment. Since no consideration was given, a great deal of setup time was required. Further, the detection means or auxiliary means is
Since it is often installed independently of the spindle and the turret, it has the drawback of becoming large and expensive.

An object of the present invention is to make it possible to easily replace the turret tool post of a conventional numerically controlled lathe with detection means and / or auxiliary means, and to reduce the size and cost of the apparatus. Is to try.

[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
Detecting means for outputting a detection signal and / or auxiliary means driven by fluid pressure are exchangeably attached to a plurality of tool holder attachment surfaces of the turret, and the detection is performed in a receptacle and a fluid passage provided in the turret tool post. Means and / or a signal line connector of the auxiliary means or a fluid passage is connected to receive a signal from the detection means and / or the auxiliary means mounted on the tool holder mounting surface, or the detection means and / or And / or driving and controlling the auxiliary means.

[0007]

The tool holder, the detecting means, and the auxiliary means can be attached to the tool holder mounting surface of the turret tool post with compatibility with each other. Therefore, any tool holder, detecting means, and auxiliary means can be mounted as necessary. Etc. can be installed. Further, since the turret tool post is provided with a fluid passage so that a fluid can be supplied to the inspection means or the auxiliary means,
The fluid passage is connected only by attaching the detecting means or the auxiliary means to the tool holder mounting surface, and the measuring portion can be air blown or the auxiliary means can be operated. In addition, since a receptacle that serves as a signal line is attached to the turret tool post,
The electrical signal from the detecting means can be transmitted only by attaching the detecting means to the cutting oil mounting surface and connecting the output side connector of the detecting means to the receptacle.

[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 spindle (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.

Next, a first application example of the turret tool post 1 having the above construction will be described with reference to FIGS. 8 and 9. In this embodiment, a tool tip position measuring device 51 that measures the tip position of the tool 50 mounted on another tool post (not shown) to inspect the tool 50 for wear or chipping is provided with a detecting means mounting surface 7.
The example attached to one of a is shown. Tool tip position measuring device 5
1 is a sensor terminal 5 for measuring the position of the tool tip.
5 has a cable guide 52 inserted into the tool holder hole 9 of the turret 6 on the output side thereof, and a connector 54 attached to the end of the cable 53 is attached to the receptacle attachment plate 41. Connected to the receptacle 42. Then, the curl cord 45 is connected to the control unit via the signal conversion circuit 40. The tool tip position measuring device 51 is provided with a sensor terminal 55. The curl tube 33A is connected to a compressed air source such as a compressor via a solenoid valve (not shown).

With this tool tip position measuring device 51, the tool 50
When measuring wear and chipping of the
The tool tip position measuring device 51 is indexed to a predetermined position by rotating in the axial direction, and is moved in the X-axis direction and the Z-axis direction to position the sensor terminal 55 of the tool tip position measuring device 51 at a predetermined position. On the other hand, the tool 50 attached to another tool post (not shown) moves to a predetermined position and stops, and the sensor terminal 55 of the tool tip position measuring device 51 advances to a predetermined position of the cutting edge of the tool 50. Contact and measure the size (coordinates) of the position. The electric signal generated by the measurement by the sensor terminal 55 is sent from the receptacle 42 to the signal conversion circuit 40 through the cable 53, and is converted from the parallel signal to the serial signal by the signal conversion circuit 40.
It is sent to the control unit through the curl code 45. The control unit performs a predetermined arithmetic processing, compares the reference data with the reference data to determine the dimension of the cutting edge (amount of wear or presence of a chip) at the measurement point, and outputs the determination result to the arithmetic control means of the numerically controlled lathe. The arithmetic and control unit corrects the tool correction amount or issues a tool replacement command based on the determination result. Accordingly, when the tool 50 is set, the blade edge position of the tool 50 is measured in three directions, and the origin of the tool or the tool correction amount can be set with the blade edge position as a reference. Further, during operation of the numerically controlled lathe, the blade edge position is measured at a predetermined interval to detect friction and breakage (chip) of the tool 50,
The tool life can be determined.

At the time of measurement by the tool tip position measuring device 51, compressed air is sent into the curl tube 33A, the fluid hole 26A provided in the swivel shaft 25, and the fluid passage 29.
Compressed air is supplied to the tool tip position measuring device 51 from the fluid passage 30A through the fluid passages 32A and 31A provided in the end plate 20 and the turret 6 and the sensor terminal 55. Air is blown from the nozzle 56 to the position of the blade edge of the tool that comes into contact. As a result, the chips, cutting fluid, etc. adhering to the tool 50 are removed and cleaned, and the measurement accuracy is improved.

10 and 11 show a second application example. In this embodiment, the work 60 chucked on a spindle (not shown)
When measuring the outer diameter of the
An example in which the work inspection device 61 is attached is shown below. A sensor 63 having a sensor terminal 62 is attached to the work inspection device 61, and an output side of the work inspection device 61 is
Similar to the first application example, it has a cable guide 52 inserted into the tool holder hole 9 of the turret 6, a cable 53, and a connector 54 attached to the receptacle 42.

Therefore, also in the case of the present embodiment, the connector 54 is attached to the receptacle 42 as in the first application example.
The curl cord 45 is connected to the control unit, and compressed air is sent to the curl tube 33A for use. As a result, similarly to the first application example, the air blow 57 is performed by the compressed air from the fluid passage 30A, the sensor terminal 62 is brought into contact with the work 60, and the work outer diameter dimension can be measured. Since the processing of the electric signal generated by the measurement is exactly the same as that of the first application example, it will not be described in detail here. By using the work inspection device 61 in which the type of the sensor 63 and the orientation of the sensor terminal 62 are changed, the work outer diameter dimension is measured while sandwiching the work 60, or the work inner diameter dimension is measured.
Of course, it is also possible to measure the dimension in the longitudinal direction of the work.

12 and 13 show a third application example. In this embodiment, the cutting oil supply pipe 70 is used to detect whether or not the cutting oil 71 is correctly applied to a predetermined position of the work 60, and the cutting oil inspection device 72 is mounted on one of the mounting surfaces 7a such as the detection means. Here is an example. Cutting oil inspection device 72
Has a well-known vibration sensor 73, and in the case of the present embodiment, it is operated in the same manner as in each of the application examples described above, and the elastic body 74 fixed to the vibration sensor 73 is positioned in the flow path of the cutting oil in the vicinity of the tool 50. Let it detect. Further, the cutting oil inspection device 72 has a cable guide 52, a cable 53, and a connector 54, and the connector 54 is attached to the receptacle 42 for use, as in the above-described applied examples. In the case of the present embodiment, it is not necessary to send compressed air to the curl tubes 33A and 33B, so the cutting oil inspection device 72 can be attached to the tool holder attachment surface 7 where the fluid passages 30A and 30B are not provided. Good. If the cutting oil 71 is correctly applied to the elastic body 74 of the vibration sensor 73, the vibration sensor 73 vibrates due to the vibration of the elastic body 74. Therefore, whether the cutting oil 71 is correctly applied to the predetermined position of the work 60 by this. Can detect.

14 and 15 show a fourth application example. The present embodiment is a case of collecting the work 60 after processing is completed.
An example is shown in which a handling device 75 having a known structure is attached to one of the attachment surfaces 7a of the detection means and the like. The pair of claws 76, 77 of the handling device 75 of the present embodiment is opened and closed by an actuator operated by hydraulic pressure or pneumatic pressure, and the configuration thereof is known as a robot hand or a manipulator, so detailed description will be omitted. To do. 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, 77 of the handling device 75 have no problem even if the workpiece held by the spindle is chucked before being cut off.
In addition, after being cut off, it is chucked via a roller so as to be surely chucked, or is made of a material having small sliding friction. In the case where the numerically controlled lathe is a lathe having a back spindle as disclosed in Japanese Patent Publication No. 29482/1992, after the workpiece is chucked by a back spindle (not shown), a parting process is performed to perform the back machining. If the rotation of the rear main shaft is stopped after the completion of the operation and the handling device 75 discharges the claws 76 and 77 of the handling device 75, it is not necessary to have a special structure.

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.

The handling device 75 of this embodiment can perform not only the above-described work discharging work but also the following auxiliary work. When machining a workpiece over the axial stroke of the spindle, the rod-shaped workpiece chucked on the spindle has a certain length (length less than the spindle stroke).
After machining, the work piece is chucked by the claws 76 and 77, then the spindle chuck is released to retract the spindle, then the spindle chuck is closed to chuck the rod-shaped workpiece again, and then It is also possible to open the claws 76 and 77 and retract the handling device 75 to process the remaining portion again.

16 and 17 show the tool holder mounting surface 7
An example in which a chip removing device 81 having a chip guide plate 80 is attached is shown in FIG. Therefore, the turret 6 is moved in the A-axis, X-axis, and Z-axis directions by the same operation as in each of the above-described application examples to position the chip guide plate 80 near the workpiece 60 machined by the tool 50. As a result, the cutting chips 82 flow along the cutting chip guide plate 80 and the flow direction of the cutting chips 82 changes, so that the cutting chips 82 are prevented from being entangled with the work 60.

Thus, the tool holder mounting surface 7 of the turret tool post 1 is provided with a tool holder 8, a tool tip position measuring device 51 as a detecting means, a workpiece inspection device 61, a vibration sensor device 70 and the like, and an auxiliary means. Handling device 7
5. Since the chip removing device 81 and the like can be attached so as to be compatible with each other, for example, when the handling device 75 becomes unnecessary and the chip removing device 81 becomes necessary instead, the chip removing device 81 can be attached. If the handling device 75 and the chip removing device 81 are unnecessary, the tool holder 8 may be attached.

The turret 6 and the swivel shaft 25 fixed to the turret 6 are provided with fluid passages 26A, 26B, 28A to 26A, 26B, 28A to enable the fluid to be supplied to the mounting surface 7a for the inspection means.
Since 32A and 28B to 32B are provided, the measuring unit can be air blown 57 or the auxiliary means can be operated only by attaching the above-mentioned detecting means or auxiliary means to the mounting surface 7a such as the inspection means. In addition, the turret 6 of the turning shaft 25
Since the receptacle 42 serving as a signal line is attached to the side, the connector 54 on the output side of the detection means is connected to the receptacle 4
The electrical signal can be transmitted only by connecting the detecting means to the tool holder attaching surface 7 by connecting the detecting means to the tool holder 2.

[0026]

According to the present invention, detection means for outputting a detection signal or auxiliary means driven by fluid pressure are provided on the tool holder mounting surface so that they can be exchanged with each other, and the turret tool post communicates with the tool holder mounting surface. Fluid passage is formed so that the fluid can be supplied from the fluid passage on the tool holder mounting surface to the drive unit of the detecting means or the auxiliary means, and a receptacle that serves as a signal line is mounted on the tool holder mounting surface. Since the output side connector of the detecting means can be connected to the receptacle, the detecting means or the auxiliary means can be easily interchanged with each other in the turret tool post of the conventional numerically controlled lathe, and Since these detection means or auxiliary means are attached to the turret tool post, an independent drive mechanism for moving them to the operating position is not required, Reduction in size and equipment cost of the auxiliary means can be reduced.

[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 side view illustrating a first application example.

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

FIG. 10 is a side view illustrating a second application example.

11 is a right side explanatory view of FIG.

FIG. 12 is a side view illustrating a third application example.

13 is a right side explanatory view of FIG.

FIG. 14 is a side view illustrating a fourth application example.

15 is a right side explanatory view of FIG. 14. FIG.

FIG. 16 is a side view illustrating a case where a chip removing device is attached to the tool holder attachment surface.

17 is a right side explanatory view of FIG. 16. FIG.

[Explanation of reference numerals] 1 Turret tool post 6 Turret 7 Tool holder mounting surface 7a Detection means mounting surface 8, 8A, 8B Tool holder 10A Bit 10B Center support tool 10C Rotating tool 20 End plate 25 Swivel axes 26A, 26B, 28A 32A, 28B to 32B Fluid passage 33A, 33B Curl tube 40 Signal conversion circuit 42, 44 Receptacle 45 Curl cord 46 Connector 50 Tool 51 Tool tip position measuring device 54 Connector 57 Air blow 60 Work 61 Work inspection device 71 Cutting oil 72 Cutting oil inspection Device 75 Handling device 81 Chip removing device 82 Chip

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 ─────────────────────────────────────────────────── ─── Continuation of the front page (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, respectively, driven by a detection means for outputting a detection signal and / or a fluid pressure. Is provided on the tool holder mounting surface in a replaceable manner, a turning shaft is fixed to the turret, and a fluid passage is formed in the turning shaft and the turret so as to communicate with the tool holder mounting surface from the turning shaft, A fluid can be supplied from the fluid passage on the tool holder mounting surface to the drive unit of the detecting means and / or the auxiliary means, and a receptacle is mounted on the swivel shaft via a signal line to detect the mounting on the tool holder mounting surface. A turret tool post for a numerically controlled lathe, characterized in that an output side connector of the means can be connected to the receptacle.