JPH03239453A - Tool edge measuring device available in lathe or turning machine - Google Patents

Abstract

PURPOSE:To secure such a tool edge measuring device that dispenses with a sensor arm and is simple in structure by installing a touch sensor in the backside position of a loader chuck for a turning arm being driven and turned round the turning center in parallel with a spindle. CONSTITUTION:A touch sensor 14 is installed in the backside position of a loader chuck 13 for a turning arm 11C of a loader 7, and such a mechanism as traveled between a measuring position in accord with a spindle 1 and a retractable position where it is not in the way of work machining is combinedly used by the loader 7. Consequently, a sensor arm is omissible, and the driver and the control system both also become disused, thus structure is simplified. In addition, since the touch sensor 14 is attached to the turning arm 11C being driven and turned round the specified turning center, a position of the touch sensor 14 at time of edge measurement can be accurately determined, so that accurate tool edge measurement is made performable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tool edge measuring device for a lathe equipped with a swing arm type loader such as a so-called fan type.

[Conventional technology]

If machining is continued on a lathe with a chipped or worn cutting edge of the tool, a large number of defective products will result. Therefore, it is necessary to periodically measure the cutting edge of the tool and replace defective tools.

As a device for performing such a cutting edge measurement, the device shown in FIG. 5 has been proposed (Japanese Utility Model Publication No. 62117053).

In this example, a sensor arm 53 is provided that can pivot to a retracted position around a pivot axis 52 parallel to a main shaft 51, and a touch sensor 54 is provided at the tip of the sensor arm 53. The touch sensor 54 is provided with a plurality of detectors 54a so that the tool 55 facing in each direction can be measured. Further, the sensor arm 53 is capable of axial movement.

When performing measurement, the sensor arm 53 is positioned in front of the main shaft 51, and the turret 56 is moved until the cutting edge of the tool 55 is detected by the touch sensor 54. Based on the position of the turret 56 at the time of this detection, the presence or absence of cutting edge damage and the amount of wear are measured. During turning operation, the sensor arm 53 is retracted to an upright position as shown by the chain line so as not to interfere with machining.

[Problem to be solved by the invention]

The conventional example requires a sensor arm 53 dedicated to measuring the cutting edge, and also requires a rotation drive source and a control system for the sensor arm 53. Therefore, there is a problem that the structure is complicated.

An object of the present invention is to provide a tool cutting edge measuring device for a lathe that does not require a conventional sensor case and has a simple structure.

[Means for Solving the Problems] A cutting edge measuring device of the present invention is a lathe having a loader in which a loader chuck is provided on a rotating arm, and a touch sensor is provided at the HM position of the loader chuck of the rotating arm. It is. The swing arm of the loader is driven to swing around a swing center parallel to the main shaft.

[Function] The swing arm of the loader swings between the main shaft and a workpiece supply station, workpiece discharge station, etc., and loads and unloads the workpiece to and from the main shaft using the loader chunk. In the middle of this loading or unloading process or in another process, the tool is brought into contact with the touch sensor of the swing arm, and the position 1 of the tool stand at the time of detection is determined to determine whether or not there is a chipped cutting edge 2 of the tool. Well, the amount of wear is QIt!
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, and a tool 1.7 (Fig. 3) such as a cutting tool or a rotary tool 18 such as a drill or end mill is installed on each peripheral surface.
(Fig. 4) is attached. As shown in FIG. 1, the tool turret 4 is installed on a turret slide 6 that moves on a rail 5 of the bed 3 so as to be indexable and rotatable and movable in the axial direction.

The loader main body 8 of the loader 7 is installed on the headstock 2, and the reversing device 9 is provided on top of it.The reversing device 9 is for reversing the workpiece W (Fig. 2) from front to back. 9a, and a rotating chuck 9 that horizontally rotates around the support shaft 9C.
It has b.

The loader 7 is of a so-called fan type, and has a radial arm 11 consisting of four rotating arms IIA to 11D fixed to a shaft 10 at the radial center. The shaft 10 is installed in the loader body 8 parallel to the main shaft 1, and is rotated and driven in the axial direction by a loader drive device 12 at the rear of the loader body 8. Each swivel arm IIA
-11D is equipped with a loader chuck 13 at its tip that can face the main shaft l and reversing device 9.
A touch sensor 14 is attached to the second rotating arm 11C, located on the back side of the loader chuck 13.

As shown in FIGS. 2 and 3, the touch sensor 14 has detectors 16 protruding from three sides of the sensor case 15, and when an object to be detected comes into contact with any of these detectors 16, a detection signal is generated. Output. That is, the touch sensor 14 has a built-in contact section that is turned on and off by a minute movement of the detector 16. It is also possible to use one that outputs detection signals independently for each of the three detectors 16. A signal line (not shown) of the touch sensor 14 connects the radial arm 11 and the loader body 8 when the radial arm 11 of the loader 7 is at a downward angle as shown in FIG.
(FIG. 1). Electricity is supplied through electrical contacts provided on the opposite surfaces of the shafts 10 (FIG. 1), or signal lines are passed through the shaft 10.

Although not shown, on the right side of the loader main body 8 in FIG. 1, a supply station for a workpiece carry-in conveyor is arranged, and on the left side, a discharge station for a carry-out conveyor is arranged. Each of these stations has a rotating arm 11
The position is opposite to the loader chucks 13 of A to 11D.

The operation of the above configuration will be explained. When performing double-side machining of the workpiece W (Fig. 2), the workpiece W, which has been machined on one side with one main spindle l, is mounted on the fixed chuck 9a of the reversing device 9, and then transferred to the rotating chuck 9b. , by turning the rotating chuck 9b for 180 m, the front and back sides are turned over. This inverted workpiece is mounted on the other spindle l, and the remaining one side is machined.

The loader 7 supports the workpiece W with respect to the bidirectional shaft 1, the reversing device 9, and the loading/unloading conveyor.
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εA・RIJ:Numberf・・,−Then, the other two rotating arm 11A, 11B are rotated to the position opposite to the main shaft 1. At the same time, screw the pre-grabbed screws W onto the double shaft 1''Q. When the row F is completed, the i'';i,::fi1 & arm 1'' in FIG.

Blade edge measurement is performed during this loader cycle process.

That is, in the unloading process explained with FIG. 3(A), the workpiece W is gripped by the loader chuck 13 as shown by the solid line in FIG. Move in the axial direction to a certain position. At this time, as shown in Figure 3 (A), the right tool turret 4
The cutting edge of the tool 17 is measured in . The cutting edge measurement is performed by moving the tool turret 4 until the tool 17 is detected by a predetermined detector 16 of the touch sensor 14. From the position of the tool turret 4 at the time of this detection, the presence or absence of cutting edge damage and the amount of wear are measured. The blade edge measurement may be performed each time the blade is unloaded, or may be performed at predetermined intervals. Since the touch sensor 14 is provided with detectors 16 in three directions, the touch sensor 14 extends in a direction parallel to the main axis 1! 1.
18 (FIG. 4) can also be measured.

When measuring the cutting edge of the tool 17 of the tool turret 4 on the left side of FIG. 3, the measurement is performed at an angle with the two center swing arms IIB and 11c facing the main shaft 1 as shown in FIG. 3(B).

In addition, in this way, the two central swivel arms IIB and IIC
Since the operation of stopping the blade facing the main shaft 1 is not performed in a normal loader cycle, a stopping stroke for measuring the cutting edge is added.

This blade edge measuring device is provided with the touch sensor 14 on the back side of the loader chuck 13 of the swing arm IIC in the loader 7.
The loader 7 can also serve as a mechanism for moving the loader 4 between the measurement position where it aligns with the main spindle 1 and the retracted position where it does not interfere with workpiece machining. Therefore, the conventional sensor arm (FIG. 5) can be omitted, its drive device and control system are also unnecessary, and the structure is simplified.

Furthermore, since the touch sensor 14 is attached to the swing arm 11C that is driven to swing around a predetermined swing center, unlike the case where the touch sensor 14 is installed in, for example, the loader of gantry 2 that is driven in an orthogonal coordinate system, when measuring the cutting edge, The position of the touch sensor 14 can be determined with high accuracy, and accurate blade edge measurement can be performed.

Moreover, the touch sensor 1 is attached to the swing arm IIC of the loader 7.
4, the blade edge measurement can be performed during the normal loader cycle as described above, and there is no need to provide dedicated time for blade edge measurement.

Therefore, the operating rate improves. For the tool turret 4 on the left side, it is necessary to increase the stop stroke of the loader 7 to measure the cutting edge as described above, but it is sufficient to provide a stop time during the normal turning process of the loader 7, and it is necessary to increase the stop stroke of the loader 7 during the special turning process. There is no need to add any action. Therefore, the time required to measure the cutting edge is only slightly increased, and the time required for measurement is shortened compared to the case where the conventional sensor arm 53 is used.

A touch sensor 14 is also installed on the swing arm IID at the left end in FIG.
If you set up and measure at the turning angle shown in Figure 3 (A),
The cutting edge of the left tool turret 4 can also be measured using only a normal loader cycle.

This makes it possible to further improve cycle time. However, if the measurement is performed as shown in FIG. 3 CB), only one touch sensor 14 is required, resulting in a simple structure.

In the embodiment described above, the detectors 16 were provided on three sides of the touch sensor 14, but the number of detectors 16 may be only one, and the number of detectors 16 can be further increased to enable measurement of the cutting edge of various tools. You can also.

Furthermore, although the above embodiments have been described with reference to a case where the present invention is applicable to a two-axis turret lathe, the present invention may also be applicable to a one-axis lathe, and may also be applicable to a lathe with a tool rest type other than a turret. The loader 7 has a rotating arm IIA-
The present invention is not limited to four 11Ds, and can be applied to one or more.

[Effects of the Invention] Since the cutting edge measuring device of the present invention is provided with a touch sensor at the back side of the loader chunk of the swing arm of the loader, the touch sensor can be moved from the detection position to a position where it does not interfere with workpiece machining. A loader can also serve as a means for moving. Therefore, the conventional sensor arm, its drive device and control system are no longer required.
This has the effect of simplifying the structure.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of the loader, FIG. 3 is an explanatory diagram of the blade edge measurement operation, and FIG. 4 is another example of the blade edge measurement operation. A broken plan view of
FIG. 5 is a partial front view of a conventional example. 1... Main spindle, 2... Headstock, 4... Tool turret, 6... Turret slide, 7... Loader, 8...
- Loader main body, 9... Reversing device, 11... Radial arm, IIA to ILD... Swivel arm, 13... Loader chuck, 14... Touch sensor, 16... Detector, 17. 18...Tool, W...Work Figure 2 Figure 1

Claims (1)

[Claims] In a lathe equipped with a loader in which a loader chuck for transferring a workpiece to the main shaft is provided at the tip of a swing arm that is driven to swing around a turning center parallel to the main shaft, , a tool edge measurement device for a lathe equipped with a touch sensor that detects the tool edge.