JPH10235539A - Measuring device for lathe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute a measuring system simply and inexpensively in a turret lathe equipped with two tool rests by sharing one sensor attached to a tool holding part of a tool rest on one side, both for workpiece measurement and for tool edge measurement. SOLUTION: A sensor 32 is detachably attached to one tool holding part of a turret 12 in an upper tool rest 11 by a holder 33. Two feelers 34 and 35 are projectingly installed in this sensor 32 so as to make them bifurcate at an angle of 90 deg. to each side of a headstock 2 and a lower tool rest 21. In succession, a spherical sensor 36 in contact with a work 5 held by this headstock 2 is installed in a tip of the feeler 34 to be projected to the side of this headstock 2. Likewise a rectangular parallelepipedic sensor 37 in contact with a tool 6 attached to a turret 22 of the lower tool rest 21 is installed in a tip of the feeler 35 projecting over the side of this lower tool rest 21 as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the positions of a workpiece and a tool edge in a lathe having two tool rests.

[0002]

2. Description of the Related Art Conventionally, in a lathe of this type, the outer diameter and the position of an end face of a work held on a headstock are measured by sensors attached to two turrets, and the lathes are held by the respective turrets. The position of the cutting edge of the tool was measured by another sensor attached to the headstock or the like.

[0003]

As a result, the number of sensors increases, the lathe measuring system becomes complicated and expensive, and the arrangement of the components of the lathe sometimes hinders the mounting of the sensors. .

Accordingly, an object of the present invention is to provide a lathe having two tool rests, in which one sensor is used for both workpiece measurement and tool edge measurement, so that a lathe measurement system can be configured simply and inexpensively. It is to provide a device.

[0005]

In order to solve the above-mentioned problems, a measuring device of the present invention comprises a headstock for supporting a spindle,
In a lathe having two turrets installed on both sides of the spindle axis so as to be relatively movable, a sensor is attached to a tool mounting portion of one of the turrets, and the sensor is branched into a headstock side and a turret side. Two feelers are protrudingly provided, a sensing part for contacting a work held on a headstock is provided at a tip of one feeler, and a tool attached to a tool mounting part of the other tool rest is provided at a tip of the other feeler. The sensor is provided with a sensing portion that comes into contact with the cutting edge.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, in the numerical control lathe of this embodiment, a headstock 2 is installed at one end of a bed 1, and a spindle 3 is rotatably supported by the headstock 2. A chuck 4 is attached to the tip of the spindle 3,
The work 5 is gripped by the chuck 4. Spindle 3
An upper tool rest 11 and a lower tool rest 21 are arranged on both upper and lower sides of the axis of the turret. It is supported so as to be able to turn index.

The tool rests 11 and 21 are fixed on the middle stands 13 and 23. The middle stands 13 and 23 are moved along the rails 17 and 27 with respect to the saddles 14 and 24 by the X-axis motors 15 and 25 via the ball screws 16 and 26. Thus, it is provided so as to be movable in the X-axis direction orthogonal to the spindle axis. The saddles 14 and 24 are mounted on the bed 1 with ball screws 19 and
It is provided movably in the Z-axis direction parallel to the main axis along rails 20 and 30 via 29. Then, the saddles 14 and 24 and the middle stands 13 and 23 are moved, and the tool rest 1 is moved.
1 and 21 are positioned on the headstock 2 and turrets 12 and 22 are positioned.
Is turned, the tool 6 is indexed to the machining position, the main shaft 3 is rotated, and the workpiece 5 is turned.

In the measuring device 31 of this embodiment,
The outer diameter and end face position of the work 5 and the position of the cutting edge of the tool 6 are measured by a single sensor 32. The sensor 32 is detachably attached to one tool attachment portion of the turret 12 of the upper tool rest 11 via the holder 33. The sensor 32 includes two feelers 34 and 35,
And the lower turret 21 side is protruded so as to branch off at an angle of 90 °. At the tip of the feeler 34 protruding toward the headstock 2, a spherical sensing part 36 that comes into contact with the work 5 held on the headstock 2 is provided. At the tip of the feeler 35 protruding toward the lower turret 21, a rectangular parallelepiped sensing unit 37 that comes into contact with the cutting edge of the tool 6 attached to the turret 22 of the lower turret 21 is provided.

FIG. 2 shows the measuring operation of the workpiece 5 and the tool 6 by the sensor 32. When measuring the outer diameter of the work 5, the upper tool rest 11 is moved in the Z-axis direction and the sensing unit 36 of the feeler 34 is positioned near the outer periphery of the work 5 as shown in FIG. Then, the upper tool rest 11 is moved in the X-axis direction, and the sensing unit 36 is brought into contact with the outer peripheral surface of the work 5. Then, the outer diameter of the work 5 is measured by calculation based on the output of the sensor 32 and the output of a position detector (not shown) provided on the X-axis motor 15 at this time.

When measuring the end face position of the work 5,
As shown in FIG. 2B, the upper tool rest 11 is moved in the X-axis direction, the sensing portion 36 of the feeler 34 is positioned near the end face of the workpiece 5, and the upper tool rest 11 is moved in the Z-axis direction. The sensing unit 36 is applied to the end face of the work 5, and the position of the end face of the work 5 is measured based on the output of the sensor 32 and the output of a position detector (not shown) provided on the Z-axis motor 18.

When measuring the position of the cutting edge of the tool 6 in the X-axis direction, as shown in FIG.
1 is moved in the Z-axis direction, the tool 6 is positioned near the sensing portion 37 of the feeler 35, the lower tool rest 21 is moved in the X-axis direction, and the cutting edge of the tool 6 is applied to the sensing portion 37, and the sensor 32 is moved.
And the output of a position detector (not shown) provided on the X-axis motor 25, the X-axis position of the cutting edge is measured.

When measuring the position of the cutting edge of the tool 6 in the Z-axis direction, as shown in FIG.
1 is moved in the X-axis direction, the tool 6 is positioned near the sensing unit 37 of the feeler 35, the lower tool rest 21 is moved in the Z-axis direction, and the cutting edge of the tool 6 is brought into contact with the sensing unit 37, and the sensor 3 is moved.
2 and the output of a position detector (not shown) provided on the Z-axis motor 28, the Z-axis position of the cutting edge is measured.

When measuring the position of the cutting edge, contrary to the above, the tool 6 is fixed and the sensor 32 is moved. That is, in the illustrated example, the lower tool rest 21 is fixed and the upper tool rest 11 is moved. May be. When measuring a tool attached to the turret 12 of the upper turret 11, the sensor 32 is attached to the turret 22 of the lower turret 21 for measurement.

[0014]

As described above in detail, according to the measuring device of the present invention, in a lathe having two tool rests, one sensor is used in the tool mounting portion of one tool rest. Mounting and sharing this sensor for work measurement and tool edge measurement has the effect of enabling a lathe measurement system to be simple and inexpensive.

[Brief description of the drawings]

FIG. 1 is an elevational view of a lathe showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an operation of a measuring device provided on the lathe of FIG. 1;

[Explanation of symbols]

2. Spindle stand, 3. Spindle, 5. Work, 6. Tool, 11. Upper turret, 21 Lower turret, 31. Measuring device, 32 Sensor, 33 Holder , 34,3
5. Feeler, 36, 37. Sensing part.

Claims (1)

[Claims] 1. A lathe having a headstock supporting a spindle and two tool rests provided on both sides of a spindle axis so as to be relatively movable, a sensor can be attached to and detached from a tool mounting portion of one of the tool rests. , The sensor is provided with two feelers that branch into the headstock side and the tool post side, and a sensing part that comes into contact with the work held by the headstock is provided at the end of one feeler, and the other feeler A measuring device having a tip provided with a sensing portion that comes into contact with the cutting edge of a tool attached to a tool attaching portion of the other tool rest.