JPH08257806A - Work seating confirming device for lathe - Google Patents

Abstract

PURPOSE: To provide a work seating confirming device capable of confirming seating of a chuck even when a work has black surface. CONSTITUTION: In a work seating confirming device for lathes, in which a work pusher device 29 is used to postion a work W in a chuck jaw 28a of a lathe, a main plate 5 is provided integrally with the shaft of the work pusher device 29, and three work mounting members 2 are mounted along the main plate 5 spaced at 120 degrees so that they can axially move. The work mounting member 2 is movably mounted through a spring 3 to a spring bearing 4 formed integrally with the main plate 5, and three proximity switches 10 are provided spaced 120 degrees on the main plate 5. Further, proximity dogs 6 are provided on the main plate 5 at the same positions as the proximity switches 10 so that they can move axially.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work seating confirmation device for a lathe which uses a work pusher device to position the work on the chuck jaws of the lathe.

[0002]

2. Description of the Related Art For example, when a gear rough material, which is a work, is processed by an automatic lathe by using an autoloader, the gear rough material W on a conveyor 22a of a work stocker 22 is loaded by an autoloader R as shown in FIG. The work is gripped by the work hand 25, pulled up in the U direction by the air cylinder 24, moved from the position A to the position B, the work hand 25 is lowered in the direction D, and the chuck 28 grips the gear rough material W which is the work. At this time, a technique is known in which the work pusher 29 is moved forward by the cylinder 30 so that the work W is in close contact with the chuck 28 and the work W is pressed against the chuck 28. Then, with reference to FIG.
Whether or not the workpiece is in close contact with the chuck is checked by the presence or absence of air leakage from the air nozzle provided at c. After the machining, the work hand 25 holds the turned work 27, moves the loader R to the C position, lowers the work hand 25 in the D direction, and carries the work 27 out onto the carry-out conveyor 23. .

[0003]

However, in the case where the work is a black skin without casting, since the surface is rough, it is not possible to judge whether or not the air leaks and the work is in close contact with the chuck. Therefore, there is a problem that machining is performed with foreign matter such as cutting chips sandwiched between the work and the chuck, resulting in defective machining.

Therefore, an object of the present invention is to provide a work seating confirmation apparatus capable of confirming the seating of a chuck even on a work having a black skin surface.

[0005]

According to the present invention, there is provided a work seating confirmation device for a lathe, which uses a work pusher device for positioning a work on a chuck claw of a lathe,
The work pusher device is provided with a main plate integrally with the shaft, and three work attaching members are attached along the main plate so as to be axially movably angularly separated by 120 degrees, and the work attaching members are attached via springs. Is movably attached to a spring receiver that is integral with the main plate. Three proximity switches are provided on the main plate at angular intervals of 120 degrees, and a proximity dog that is axially movable to the main plate at the same position as the proximity switches. Is provided.

Further, according to the present invention, the proximity switch is screw-engaged with the bracket so that the position in the axial direction can be adjusted, and the bracket is pressed against the main plate by the spring.

[0007]

The present invention is constructed as described above, and the shaft of the work pusher device is moved forward, and the three work mounting members of the main plate integrally formed with the shaft chuck the work. Press it against the abutting surface of. At that time, if there is no foreign matter between the work and the abutting surface, the three proximity dogs turn on all three proximity switches, but there is a foreign matter somewhere between the work and the abutting surface.
If the work is tilted, at least one of the three switches does not hit the proximity dog, so it does not turn on.

If all three switches are not turned on,
If the processing cannot be started, defective processing can be prevented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In the drawings, members having the same functions as those of the prior art are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 1 is a partial sectional side view of a work seating confirmation apparatus of the present invention, in which a main plate 5 is fixed to a shaft 1 attached to a work pusher 30 with a set bolt 18 by a bolt 5a. Further, referring to FIG. 2, the main plate 5 is provided with arms 5b which are separated by 120 degrees in three directions. The arm 5b is provided with a work attaching member 2 and a spring bearing 4 and the work attaching member 2 for the work W. Via the spring 3 that biases toward the (gear rough material in the illustrated example),
It is mounted so as to be movable in the axial direction. Note that reference numeral 2b
Indicates a stopper.

On the side of the main plate 5 opposite to the work W, a bracket 7 in which three proximity switches 10 are screwed in three directions separated by 120 degrees is attached so as to be movable in the axial direction. It is biased to the plate side.

Further, the bracket 7 is provided with a guide 9 so that the switch 10 is on the same radial direction as the work attaching member 2 provided on the arm 5b of the main plate 5.

The work mounting member 2 has an arm 2a.
Attached to the end of the arm 2a of the proximity dog 6
Is attached, the dog 6 is provided on the main plate 5, penetrates a hole 11 formed so as to match the position of the proximity switch 10, and pushes the switch 10 to turn it on.
Is configured to.

Reference numeral 14 is a guide member for guiding the work W substantially to the center, reference numeral 16 is a base for mounting the guide member 14, and reference numeral 15 is the guide member 14 for the work W.
The reference numeral 17 indicates a stroke bearing, and the reference numeral 17 indicates a stroke bearing.

The operation will be described below with reference to FIG.

When the work W is set on the abutting surface 28c of the claw 28a of the chuck 28 with the work pusher, and the foreign matter B exists between the work W and the abutting surface as shown in the figure, it is close to the foreign matter B. Workpiece mounting member 5 in position
Is pushed against the spring 3. Therefore, the proximity dog 6 provided on the workpiece mounting member 5 cannot move the bracket 7, and at least one other proximity dog 6 cannot operate one proximity switch (10b in the illustrated example).

When the work W is in close contact with the abutting surface of the chuck, all the three switches are activated. Therefore, the fact that at least one switch is not operated indicates that the work is not in close contact with the abutting surface. You can check the seating of the work. Therefore, the work should be stopped and checked.

Therefore, it is possible to prevent processing defects due to poor seating of the work.

[0020]

The present invention is configured as described above,
The following excellent effects can be achieved. (1) When a work is attached to the chuck by the work pusher device, when foreign matter is caught between the work abutting surface of the chuck and the work, even if the work is rough material with black skin, it can be detected before the start of processing. (2) Therefore, machining defects are reduced and productivity is improved.

[Brief description of drawings]

FIG. 1 is a side sectional view of a work seating confirmation device for a lathe showing an embodiment of the present invention.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a diagram for explaining the operation of the seating confirmation device of FIG.

FIG. 4 is a view showing an example of automatic lathe processing using a conventional work pusher device.

5 is a side view showing the main part of FIG.

[Explanation of symbols]

 1 ... Shaft 2 ... Work mounting member 3, 8, 15 ... Spring 4 ... Spring receiver 5 ... Main plate 6 ... Proximity dog 7 ... Bracket 9 ... Guide 10 ... Proximity switch 11 ... Hole 22 ... Work stocker 25 ... Work hand 29 ... Work pusher 30 ... Cylinder B ... Foreign matter W ... Work

Claims (2)

[Claims] 1. A work seating confirmation device for a lathe, which uses a work pusher device to position a work on a chuck claw of a lathe, wherein the work pusher device is provided with a main plate integrally with the shaft, and the main plate is provided along the main plate. The three work mounting members are angularly movably 120 degrees apart from each other in a direction, and the work mounting members are movably mounted on a spring receiver integrated with the main plate via a spring, and are angularly mounted on the main plate. 120 degrees apart 3
A work seating confirmation device for a lathe, which is provided with two proximity switches, and a proximity dog that is axially movable on the main plate at the same position as the proximity switches. 2. The work seating confirmation device for a lathe according to claim 1, wherein the proximity switch is screwed to the bracket so that the position in the axial direction is adjustable, and the bracket is pressed against the main plate by a spring.