JPS6124148B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a pallet magazine used in machine tools to store pallets loaded with workpieces for automatic operation, in which the workpieces carried into the machining station are truly preset workpieces. The present invention relates to a workpiece discriminating device for a machine tool equipped with a pallet magazine for discriminating whether a workpiece is a workpiece or a workpiece.

Conventionally, a workpiece corresponding to a predetermined pallet is set in an automatic machine tool equipped with a pallet magazine, and when the workpiece is carried into a machining station, it is machined using a machining program corresponding to the workpiece.

That is, the workpieces to be mounted on a predetermined pallet are set in advance, and by detecting the pallet, the workpieces are sensed and processed according to a predetermined processing program.

For example, as shown in FIG.
A plurality of carts b are provided, and a pallet c with workpieces placed on the cart b is placed on the pallet c. A dock d facing the work number is provided on the pallet c, and the work number is entered by the dot d and a limit switch e. It is detected and input to the NC device f to control the operation of the machine tool g according to a predetermined machining program.

In FIG. 1, h is a pallet magazine operating device.

This operation is illustrated in a table as shown in FIG.

For this purpose, a large number of docks d are provided, and the amount of work varies depending on the work number when combining them.
The operation is troublesome and operation errors are likely to occur, and when the number of types of workpieces increases, the number of docks must be increased, resulting in high costs.

In addition, the workpiece number detected by the dock d and the limit switch e is input to the NC device f, and the processing program corresponding to the signal is searched from the memory f' of the NC device f based on the signal.
Machining program search errors are likely to occur, and problems may occur because machining cannot be performed using a machining program that matches the workpiece number.

The present invention was made in view of the above circumstances, and its purpose is to accurately select a machining program that matches the workpiece number, which is highly reliable, and which is easy to operate and inexpensive to identify workpieces in a machine tool. The purpose is to provide equipment.

Embodiments of the present invention will be described below with reference to FIG. 3 and subsequent figures.

FIG. 3 is an overall schematic explanatory diagram, in which the pallet magazine A is connected to the endless chain 1 by the first to tenth carts 2 ₁
2 ₁₀ is provided, and the endless chain 1 is rotationally driven by the magazine drive device 3, and the machine tool M is placed in the conveyance path 7 facing the predetermined loading/unloading position B.
are arranged opposite to each other via.

Each cart 2 is provided with a pallet 4, and a workpiece 5 is mounted on the pallet 4, and a pallet loading/unloading mechanism 8 for loading/unloading the pallet 4 into/out of the machine tool M is installed at the loading/unloading position B. It is provided.

Each pallet 4 is provided with a work number setting device 6 for displaying the number of the work mounted thereon.

The machine tool M is provided with a turntable 11 at the lower part of the main body 10 and a horizontal member 12 at the upper part, and a mounting body 13 is provided on the horizontal member 12 so as to be movable left and right. A ram 14 is provided so as to be movable up and down, and a swing head 15 is provided on the ram 14 so as to be movable up and down, and a touch sensor 16 is detachably attached to the swing head 15.

As shown in FIGS. 5, 6, and 7, the work number setting device 6 has a housing 21 provided on a mounting plate 20 bolted to the pallet 4, and a rod 22 is slidable into the housing 21. The support shaft 25 of the pinion 24 is provided in the
A dial knob 26 is provided, and a scale 27 facing a pointer 26a of the dial knob 26 is formed on the housing 21, so that the rotational position of the dial knob 26 corresponds to the amount N in which the rod 22 moves in and out.
28 is a spring 29 that connects to the back surface 26b of the dial knob 26.
This is a member that is crimped to the dial knob 26 and applies a load when the dial knob 26 is rotated.

Next, the operation will be explained.

The dial knob 26 is rotated in accordance with the workpiece number loaded on the pallet 4, so that the pointer 26a matches the scale corresponding to the workpiece number.

As a result, the amount N of movement in and out of the rod 22 is determined and becomes a value corresponding to the workpiece number.

Then, the pallet 4 is transported onto the turntable 11 of the machine tool M and positioned at a predetermined position.

At the same time, the ram 14 is moved left and right to position the contact piece 16a of the touch sensor 16 at the left and right origin Y, and then the ram 14 is moved left and right to bring the contact piece 16a into contact with the rod 22.

As a result, the distance traveled by the touch sensor 16 from the origin Y until it comes into contact with the rod 22 is measured, and the workpiece number is detected from this measured value.

In other words, since the distance corresponds to the amount N of the rod 22 going in and out, the work number can be detected by measuring the distance.

The details are shown in FIG. 8. The mounting body 13 is moved by rotating the feed screw rod 30 by the motor M, and the amount of movement from the origin Y is measured by the stroke counter 3.
1, counting starts with the counting start signal _R1 , and the signal from the touch sensor 16
Counting is stopped at _R2 , and the amount of movement from the origin Y to contact with the rod 22 is counted and sent to the NC device 32 as a machining program call signal _R3 .

As a result, a machining program corresponding to the workpiece number is selected, the touch sensor 16 and a predetermined tool are exchanged by an automatic tool exchanger (not shown), and the machining operation is controlled based on the selected machining program.

The above operation is illustrated in a table as shown in FIG.

With the present invention as described above, it is possible to accurately know the amount of movement in and out of the rod 22 using the pointer 26a and the scale plate 27, and it is possible to accurately set the amount of movement in and out of the rod 22 corresponding to the workpiece number.
Since the moving amount of 2 can be accurately detected as the moving amount of the ram 14 by the touch center 16 and the stroke counter 31, the machining program that matches the workpiece number can be accurately selected without error and is highly reliable.

In addition, by rotating the dial knob 26, the amount of movement in and out of the rod 22 can be adjusted to correspond to the workpiece number, making the operation easy. In addition, by adjusting the rotation angle of the dial knob 26, it is possible to adjust the amount of movement of the rod 22 into and out corresponding to the workpiece number. The amount of movement of the rod 22 in and out can be adjusted accordingly, and there is no need to provide a large number of docks, resulting in lower costs.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is an operation table thereof, Fig. 3 is a plan view showing an embodiment of the present invention, and Fig. 4 is an explanatory diagram of a conventional example.
The figure is a front view of the machine tool, Figure 5 is a front view of the workpiece number setting device, Figure 6 is a sectional view, Figure 7 is a perspective view,
FIG. 8 is an operation explanatory diagram, and FIG. 9 is an operation table diagram. 4 is a pallet, 6 is a work number setter, 14 is a ram, 16 is a touch sensor, 22 is a rod, 26
is a dial knob.

Claims (1)

[Claims] 1. In a machine tool equipped with a ram 14 that moves in a predetermined direction from the origin, a work number setting device 6 is provided on the pallet 4 on which a work is mounted, and
The work number setting device 6 is connected to a rod 22 which is moved in and out by rotating a dial knob 26 having a pointer 26a.
and a scale 27 facing the pointer 26a, and the amount of inflow and outflow of the rod 22 is measured by the ram 1.
A touch sensor 16 is attached to the ram 14 to detect the amount of movement from the origin of 4.
A stroke counter 31 is provided to detect the amount of movement of the ram 14 from the origin until the touch sensor 16 comes into contact with the rod 22, and the machining program corresponding to the workpiece number is selected based on the detected value. A machine tool workpiece discrimination device featuring: