JPS5976758A - Work discriminating device for nc machine tool - Google Patents

Abstract

PURPOSE:To discriminate the work simply and surely by a method wherein a plate, equipped with a detecting piece detachably, is fixed to one end of a pallete putting the work thereon and the detecting work piece is detected by a touch sensor mounted on a main spindle head. CONSTITUTION:The plate 10 for discriminating the work is attached to the adaptor 9 therefor through bolts 11, in the machine tool in which a plurality of palletes 3, put on the head 4 of a pallete magazine device, are transferred intermittently and a necessary working is applied to the work 8 supported on the pallete 3 through the adaptor 9 by the NC machine tool 1 during stopping the pallets 3. The plate 10 is provided with a plurality of adaptor holes 13 and the detecting piece 12 is attached to the adaptor hole proper for the work 8 to be discriminated. Whenthe detecting piece 12 is detected by the probe 23 of the touch sensor 22 attached to the main spindle head 7 prior to be working by the NC machine tool 1, the work 8 is decided that it is the work to be worked, and the predetermined working is effected.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method in which a workpiece (hereinafter collectively referred to as a work) supplied to a numerically controlled machine machine is matched with a machine program prepared in a control device of a machine tool in order to machine the workpiece. This relates to a device that determines whether or not the

Numerical control machine tools (hereinafter collectively referred to as NC machine tools) are
A machining sequence consisting of a combination of tools, tool trajectories, machining conditions such as tool rotation speed and speed for machining a given workpiece is stored in a storage device such as a paper tape, magnetic tape, or magnetic drum. Process the workpiece according to the specified order. When moving a workpiece between multiple NC machine tools and using each NC machine tool to process the workpiece into a predetermined shape, the workpiece is placed on a pallet, and this pallet has the necessary information to process the placed workpiece. It is common practice to attach a corresponding code to each NC program. This code is usually composed of a combination of several signals such as binary codes, and an operator can attach a code sheet to a predetermined position on the pallet and detect it photoelectrically, or multiple coded signals can be detected photoelectrically. A protrusion has been installed and detected magnetically or mechanically.

In the above-mentioned conventional detection device, the code sheet is covered with cutting oil and dust adheres to it, resulting in false detection, and when multiple protrusions are installed, the cord and workpiece may be attached in the wrong position. There were disagreements and disagreements. If the operation of the NC machine tool progresses due to incorrect detection or installation error, the workpiece may not be in the position where the workpiece should be based on the contents of the workpiece, and conversely, the workpiece may be in the position where there is no workpiece. As a result, there have been cases where the tool being continuously fed collides with the workpiece, causing damage to the machine and the workpiece. The actual damage caused by machine failure is serious, and even if it does not occur, the workpiece will be defective and the machining time will be a complete waste of time.

It is an object of the present invention to eliminate the above-mentioned conventional drawbacks, to provide a workpiece identification device with a simple configuration and fewer operational errors, and to eliminate downtime due to mechanical failure or the like.

In order to achieve the above object, in the present invention, a plate having a large number of holes is provided at one end of the pallet on which the work is placed, and a detection piece is detachably formed on this plate, and a position where the detection piece is attached is provided. The present invention is characterized in that it includes a detection device for checking, a spindle head for positioning the detection device at a confirmation position of the detection piece, and a control device for controlling the position of the spindle head.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

FIG. 1 is a plan view showing a mechanical arrangement for explaining an embodiment of the present invention. 1 is an NC machine tool, a 2-piece setup station, and a 3-piece pallet magazine device. The NC machine tool 1 consists of a ped 4, a saddle (not shown), a table 5 mounted on the saddle so as to be movable in the direction of arrow Y, and a pallet pace 6 placed on the table 5 to fix the pallet 3. With a seven-digit spindle head, necessary tools are supplied from a tool magazine (not shown) using an automatic tool changer (not shown). The pallet magazine device 3 has a plurality of pallets 3 placed on a bed 4, and is placed on a transfer device so as to be able to pivot to the right or left as shown by an arrow A. Setup station 2 pallet magazine device 3
A pallet 3 is pulled out from a machining device 3 provided at one end of the pallet 3 to attach and detach a workpiece.

2 and 3 show a front view and a side view of a work 8 placed on the pallet 3. Reference numeral 9 denotes a fixture for fixing the work 8 on the pallet 3.

Reference numeral 10 denotes a plate attached to the left front side of the fixture 9, the details of which are shown in FIGS. 4 and 5.

FIG. 4 is a front view of the plate 10, and 11 is a front view of the plate 10.
Attach to fixture 9. Bolt, 12 is detection piece 13
This is the mounting hole for attaching the

The plate 10 is a bent L-shaped plate with mounting holes 13 formed on both sides. FIG. 6 is an explanatory diagram for explaining the present invention in detail, and 14 is a motor that drives the table 5 in two axes (axes along the axis of the spindle head 7), and 15 is a feed screw around the Z-axis. As the motor 14 rotates, the table 5 is moved in the Z-axis direction. 16 is the X-axis circumferential motor;
Reference numeral 17 denotes an X-axis circumferential screw, and as the motor 16 rotates, the main head 111111 moves up and down along the X-axis.

A saddle 18 is placed under the table 3 and moves in the Y-axis direction relative to the pace 4. 19 is a Y-axis peripheral motor, and 20 is a Y-axis peripheral screw. 21 is an NC control device that controls 3 axes (X, y
, z) 17)% - The machining is progressed by driving the spindle head 7 and the workpiece 8 relative to each other by driving the shafts 14, 16 and 19 respectively.

Reference numeral 22 denotes a touch sensor attached to the spindle head 7, which is stored in a tool magazine together with tools, and is attached to the spindle head 7 by an automatic tool changer.

Reference numeral 23 denotes a prong attached to the tip of the touch sensor 22, and the tip of this prog 23 comes into contact with the object to be detected, thereby detecting the object.

Next, the operation will be explained using FIG. 7. The control device 24 selects the pallet 3 on which a predetermined workpiece 8 is placed by the pallet magazine R3 according to instructions from the control device 24 (often a computer that controls the machining process, etc.), and
C. Transfer to table 5 of machine tool 1. At this time, the plate 10 is oriented toward the machine as shown in FIG. At the same time, a predetermined Canadian program is selected and supplied to the NC device. Next, after the touch sensor 22 is attached to the spindle head 7,
The X-axis and Y-axis motors are driven by the NC control device 21, and the detection piece 12 is positioned on the Z-axis, which is an extension of the tip of the touch probe 23. The z#I motor 14 is driven and the touch probe 23 or the detection piece 1
It is sent at Nt to the extent that it should touch 2. At this time, detection piece 1
If the touch sensor 22 is installed in the predetermined position, the touch sensor 22
If a contact signal is generated from the contact signal, it means that the predetermined cutting program is normal and processing is executed. X-axis and Y-axis motors 16.
If the signal from the touch sensor 22 is output while rotating the 2-axis motor 14, and if there is no signal from the touch sensor 22 when the two-axis motor 14 is rotated and positioned, the work 8 and the prepared cannibal program It is determined that they do not match, and the pallet 3 is returned to the setup station 2 via the pallet magazine device 3. Furthermore, when the touch sensor 22 is brought into contact with the detection piece 12, it is necessary to allow for variations in the mounting method of the detection piece 12 and the dimensions of the parts. It is also possible to measure whether the value is within a certain value. In the explanation of the above embodiment, a horizontal machine tool was described, but in the case of a vertical machine tool, the main axis (Z axis) moves in the vertical direction, and the detection piece is placed on the other side of the play plate 10. 12 and use it.

As described above, the present invention provides a plate having a large number of holes at one end of the pallet on which the work is placed, and confirms the detection piece detachably formed on this plate and the position where this detection piece is installed in advance. This is a workpiece identification device for a machine tool that has a detection device, a spindle head that positions the detection device at the confirmation position of the detection piece, and a control device that controls the position of this spindle head, so it has a simple configuration and prevents operational errors. This has the effect of reducing downtime due to mechanical failure, etc.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the arrangement of machine tools, Figures 2 and 3
The figures are a front view and a side view of the pallet, Figures 4 and 5 are a front view and a side sectional view of the plate, Figure 6 is a mechanical configuration diagram explaining the invention in detail, and Figure 7 is a detailed diagram of the invention. A flowchart is provided to explain the process. 1...NC machine tool, 3...pallet magazine device, 3...pallet, 5...table,
6...Pallet pace, 7...Spindle head, 8...
Workpiece, 10...Plate, 12...Detection piece,
13... Mounting hole, 14, 16. 19... Motor, 21... NC control device, 22... Touch sensor, 24... Control device. $1 Figure 3 Figure 2 Figure 5 Figure 4 Figure 6

Claims (1)

[Claims] A plate having a large number of holes is provided at one end of a pallet on which a work is placed, and a detection piece is detachably formed on this plate, and a detection device that confirms the position where this detection piece is installed in advance. with equipment. A work identification device for a machine tool, comprising: a spindle head that positions the detection device at a confirmation position of the detection piece; and a control device that controls the position of the spindle head.