JPH06277987A - Numerically controlled lathe - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a trouble caused by supply failure of cutting oil in long hour unmanned operation by arranging a cutting oil inspecting device to judge whether or not a delivery quantity of the cutting oil and/or a supply position of the cutting oil are proper, in a passage of the cutting oil delivered in the vicinity of a cutting point so as to be inserted and removed freely. CONSTITUTION:When a delivery quantity and/or a supply position of cutting oil 71 are detected by a cutting oil inspecting device 72, a turret 6 is rotated, and the cutting oil inspecting device 72 is indexed to a prescribed position, and is moved in the X axis direction and the Z axis direction, and a vibration sensor 73 of the cutting oil inspecting device 72 is situated in a passage of the cutting oil delivered in the vicinity of a tool 50, and vibration of an elastic body 74 caused by a flow of the cutting oil is detected. This vibration is detected, and judgment is made whether or not the cutting oil 71 is sprinkled rightly in a prescribed position of a work 60, and the delivery quantity of the cutting oil 71 is detected by the magnitude of the vibration of the elastic body 74.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerically controlled lathe, and more particularly to a numerically controlled lathe equipped with a cutting oil inspection device which is suitably applied to long-term unmanned operation.

[0002]

2. Description of the Related Art Conventionally, it has not been provided with a cutting oil inspection device for detecting whether or not the amount of cutting oil discharged and / or the supply position of cutting oil is appropriate to determine whether the cutting oil is appropriate or not. The amount of cutting oil discharged and the position of supply were checked and corrected accordingly. Therefore, even if there is a specific process that requires cutting oil (such as heavy cutting or precision machining) when performing unmanned operation for a long period of time, the cutting oil is sometimes applied visually as in normal machining. Only by confirming the condition, specially manage the cutting oil discharge rate and / or cutting oil supply position in the specific processing, and confirm that the required amount of cutting oil is reliably applied to the required position. I didn't do it.

[0003]

Conventionally, since there is no device for confirming that the required amount of cutting oil is surely applied to the required position, it is possible to use the chips of cutting chips mixed in the cutting oil. If the cutting oil pump or piping pipes are clogged, the flow of cutting oil stops, or the position of the discharge nozzle moves and the position of the cutting oil changes, it cannot be detected. Even if a defective product occurs in the machined work due to the lack of the machine, it will not be noticed until the development of a lathe failure, and the defective product may continue to be produced.

It is an object of the present invention to provide a cutting oil inspection device on a numerically controlled lathe to eliminate troubles due to defective supply of cutting oil during long-time unmanned operation.

[0005]

The structure of the present invention for achieving the above object is to provide a cutting oil inspection device for judging whether or not the discharge amount of cutting oil and / or the supply position of cutting oil is appropriate. It is characterized in that it is provided so that it can be inserted into and removed from the flow path of the cutting oil discharged in the vicinity of the cutting point.

[0006]

[Function] Since a cutting oil inspection device is provided on the numerically controlled lathe,
The discharge amount of cutting oil and / or the cutting oil supply position can be detected, and troubles due to defective supply of cutting oil during long-time unmanned operation can be eliminated.

[0007]

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 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 cutting oil supply pipe 70 is provided at a predetermined position of the work 60 chucked by a spindle (not shown).
There is shown an example in which a cutting oil inspection device 72 for detecting whether or not the cutting oil 71 is correctly applied is attached. The cutting oil inspection device 72 has a known vibration sensor 73, and the elastic body 74 of the bar field is fixed to the vibration sensor 73.
The vibration sensor 73 detects the vibration of the elastic body 74 due to the flow of cutting oil.
It is what is detected by. The output side has a cable guide 52 inserted into the tool holder hole 9 of the turret 6, a cable 53, and a connector 54 connected to the receptacle 42 attached to the receptacle attachment plate 41.
By connecting this connector 54 to the receptacle 42, it is connected to the control unit via the signal conversion circuit 40 and the curl cord 45. In the case of the cutting oil inspection device 72, it is not necessary to send compressed air from the curl tubes 33A and 33B. Therefore, the cutting oil inspection device 72 is mounted on the tool holder mounting surface 7 where the fluid passages 30A and 30B are not provided. It may be provided.

When the discharge amount and / or supply position of the cutting oil 71 is detected by the cutting oil inspection device 72, the turret 6 rotates in the A-axis direction and the cutting oil inspection device 72 indexes to a predetermined position. Then, the vibration sensor 73 of the cutting oil inspection device 72 is moved in the X-axis direction and the Z-axis direction to be positioned in the flow path of the discharged cutting oil in the vicinity of the tool 50, and the elastic body 74 is moved by the flow of the cutting oil. Detect vibration. The electrical signal generated by the detection by the vibration sensor 73 is sent from the receptacle 42 to the signal conversion circuit 40 through the cable 53, is converted from a parallel signal to a serial signal by the signal conversion circuit 40, and is sent to the control unit through the curl code 45. To be When the cutting oil 71 is correctly applied to the elastic body 74, the vibration of the elastic body 74 is detected by the vibration sensor 73, and thus it is possible to detect whether the cutting oil 71 is correctly applied to the predetermined position of the work 60. The discharge amount of the cutting oil 71 can be detected by the magnitude of the vibration of the elastic body 74.

In this embodiment, as described above, the cutting oil inspection device 72 is mounted on the tool holder mounting surface 7 of the turret tool post 1.
Since it is provided, it is possible to detect the discharge amount of the cutting oil 71 and / or the supply position of the cutting oil 71 at any timing, and eliminate the occurrence of troubles due to defective supply of cutting oil during long-term unmanned operation. You can Further, since the receptacle 42 serving as a signal line is attached to the turret 6, it is only necessary to connect the output side connector 54 of the cutting oil inspection device 72 to the receptacle 42 and attach the cutting oil inspection device 72 to the tool holder attachment surface 7. The electric signal of the vibration sensor 73 can be transmitted to the arithmetic and control unit. Further, the program for moving the cutting oil inspection device 37 can also be operated by the arithmetic control means of the numerically controlled lathe as the movement of the turret tool post 1, and the program can be simplified.

[0016]

According to the present invention, in a numerically controlled lathe, a cutting oil inspection device for determining whether or not the amount of cutting oil discharged and / or the position where cutting oil is supplied is discharged near the cutting point. Since it is provided so as to be insertable into and removable from the flow path of the cutting oil thus prepared, it is possible to eliminate the occurrence of troubles due to defective supply of cutting oil during long-time unmanned operation.

[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]

 1 Turret Turret 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 40 Signal Conversion Circuit 42, 44 Receptacle 45 Curled Cord 46 Connector 54 Connector 60 Work piece 71 Cutting oil 72 Cutting oil inspection device 73 Vibration sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihide Kanaya 840 Shimotomi, Tokorozawa, Saitama Prefecture Citizen Watch Co., Ltd. Tokorozawa Office

Claims (2)

[Claims] 1. A cutting oil inspection device for determining whether or not a discharge amount of cutting oil and / or a supply position of cutting oil is appropriate is inserted into a flow path of cutting oil discharged near a cutting point, A turret tool post for a numerically controlled lathe characterized by being detachable. 2. A detection terminal of the cutting oil inspection device is a vibrating body that vibrates according to the flow of cutting oil, and the amount of cutting oil discharged and / or the supply of cutting oil is detected by detecting the vibration of the vibrating body. The numerically controlled lathe according to claim 1, wherein the position is detected.