JPH0531649A - Correcting device for machining data in machining device - Google Patents

Abstract

PURPOSE:To prevent lowering of machining precision owing to the error in the reference plane of a jig located on a pallet. CONSTITUTION:Through utilization of the reference plane of a jig located on a pallet 20, a work 10 is arranged in a given position on the pallet 20. The pallet 20 is set in the machining position of a machining device 40, and machining is applied on the work 10 based on given machining data. A correcting device for machining data a machining device comprises a recording means 50 located on the pallet 20 and prerecording the error in a reference plane of the pallet 20, a reading means 60 to read an error recorded in the recording means 50, and a data correcting means 80 to correct machining data based on an error read by the reading means 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for correcting machining data of a machining machine for machining a workpiece arranged on a pallet.

[0002]

2. Description of the Related Art In processing lines for automobile parts,
The work to be processed is conveyed to the processing machine while being placed on the pallet. Then, the processing machine pulls the conveyed work together with the pallet into a predetermined processing position,
After that, the work is processed based on predetermined processing data.

The work is arranged at a predetermined position of the pallet by utilizing the reference surface of a jig provided on the pallet. Therefore, when the pallet is set at the processing position of the processing machine, the reference is set. The surface becomes the processing reference position in the processing machine.

[0004]

In some cases, the reference surface of the jig provided on the pallet has an error from the beginning of manufacturing the jig. Further, the error of the reference surface is also caused by abrasion of the reference surface due to repeated use of the pallet. If there is an error in the reference plane, the relative positional relationship between the processing machine and the work is displaced, and the work accuracy of the work is reduced.

In view of the above-mentioned conventional problems, an object of the present invention is to provide a processing data correction apparatus in a processing machine capable of preventing a decrease in processing accuracy due to the error of the reference surface.

[0006]

According to the present invention, a work is placed at a predetermined position of a pallet by using a reference surface of a jig provided on the pallet, and the pallet is set at a working position of a working machine. It is applied when processing the work based on predetermined processing data, is provided on the pallet, and records the error of the reference surface in the pallet in advance, and the error recorded by the recording device is read. The reading means and the data correcting means for correcting the processed data based on the error read by the reading means are provided.

[0007]

The error of the reference surface recorded on the pallet is read by the reading means, and the working data of the working machine is corrected based on this error.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the work 10 is a pallet 2
In the state of being placed on 0, they are sequentially conveyed to the processing machines 40, 40, ... By the conveyor 30.

As shown in FIG. 2, the pallet 20 is
A base 21 placed on the transport conveyor 30 is provided. Each of the four corners of the lower surface of the base 21 has a reference surface 2
2 is formed on the upper surface of the base 21, and the workpiece mounting portions 25, 26, and 26 have machining reference surfaces 23, 24 ,.
... is projected.

The work 10 is placed on the machining reference surfaces 23, 24, ... With the pin hole 11 for positioning fitted in the pin 27 protruding from the machining reference surface 23, and then on the base 21. It is fixed by the arms 28 and 29 of the provided clamping means. The pin 27 functions as a left and right positioning means for the work. Further, the work placing parts 25, 26, ..., Clamping means and the like constitute a work fixing jig.

On the side surface of the base 21 of the pallet 20, the ID is
The tip 50 is detachably attached. In the ID chip 50, an error in the height direction of each of the processing reference planes 23, 24, ... With reference to the reference plane 22 is recorded in advance. That is, for example, with respect to the machining reference surface 23 on the work placement part 25, the difference between the measured value L of the distance from the reference surface 23 to the reference surface 22 and the standard value for the distance is the reference surface 23. ID data indicating an error (for example, +0.
012 mm). The recording of this ID data is performed by using a writing means (not shown).

Reading sensors 60, 60, ... Corresponding to the respective processing machines 40 are arranged on the side of the conveyor 30. These sensors 60, 60, ... Are provided to read the ID data of the ID chip 50 in a non-contact manner (for example, magnetic detection). The sensor 60 is connected to the NC device 80 of the corresponding machine 40 via the ID controller 70 of the corresponding machine 40.

Next, the operation of this embodiment will be described.
When the pallet 20 is conveyed to the front of the processing machine 40 by the conveyor 30 and its ID chip 50 is positioned beside the sensor 60, the ID recorded in the ID chip 50 based on the command from the NC device 40. The data is read by the sensor 60.

The ID data read by the sensor 60 is amplified by the ID controller 70, subjected to appropriate processing, and then added to the NC device 80.

By the way, as will be described later, the work 10
Is machined in a state of being set at the machining position of the machining machine 40 together with the pallet 20, so that the machining reference plane 23,
The error of 24, ...
This causes a setting error at the position of 0 and reduces the processing accuracy.

Therefore, the microprocessor incorporated in the NC unit 80, based on the NC machining data (tool positioning data) and the ID data stored in advance in the memory, the machining reference planes 23, 24, ... The corrected NC machining data is created by correcting the NC machining data by the positional deviation of the workpiece 10 due to the error. Specifically, for example, the Z-direction tool target position based on the NC machining data is P
1 and the position P obtained based on the ID data
Assuming that the Z-direction work position deviation amount for 1 is + ΔP1, P1 + ΔP1 is created as the corrected NC machining data corresponding to the position P1.

The NC device 80 operates the pallet loading / unloading means (not shown) after the correction NC processing data is created. As a result, the pallet 20 is drawn and set together with the work 10 from the conveyor 30 to the processing position of the processing machine 40. After that, the NC device 80 controls the machining machine 40 based on the corrected NC machining data, and as a result, even if there is an error in the machining reference planes 23, 24, ... Appropriate processing is performed.

When the processing of the work 10 is finished, the work 10 is returned together with the pallet 20 from the inside of the processing machine 40 to the conveyor 30 by the pallet loading / unloading means and is transferred to the next processing machine 40.

By the way, the machining reference surfaces 23, 24, ... Of the pallet 20 gradually wear as the work 10 is repeatedly placed. Therefore, the reference planes 23, 24,
The error of ... Is regularly measured, and the ID data is rewritten each time.

In the above embodiment, the reference planes 23, 2
Although the ID chip 50 is used as a means for recording the error of 4, ..., An appropriate recording means such as a barcode may be adopted instead.

Further, in the above embodiment, the error of the processing reference planes 23, 24, ... Is recorded in the ID chip 50, but other data such as the pallet number is recorded in the ID chip 50 for use. Is also possible.

[0023]

As described above, according to the present invention,
The error of the jig reference surface of the pallet provided on the pallet is recorded in advance, and the error is read to correct the processing data of the processing machine. Therefore, even if there is an error in the reference plane, it is possible to process a work with high accuracy.

[Brief description of drawings]

FIG. 1 is a perspective view conceptually showing an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a configuration of a pallet and a manner of placing a work on the pallet.

[Explanation of symbols]

 10 ... Work 20 ... Pallet 21 ... Base 22, ... Reference surface 23, 24, ... Processing reference surface 25, 26 ... Work placement part 30 ... Conveyor 40 ... Processing machine 50 ... ID chip 60 ... Sensor 70 ... ID controller 80 ... NC device

Claims (1)

Claims: 1. A workpiece is arranged at a predetermined position of the pallet by utilizing a reference surface of a jig provided on the pallet, and the pallet is set at a processing position of a processing machine to set the work. Applied to the case where processing based on predetermined processing data is performed, the recording means is provided on the pallet and previously records the error of the reference surface in the pallet, and the reading means for reading the error recorded in the recording means. And a data correction unit that corrects the processing data based on the error read by the reading unit.