JPS6228156A - Machining method for nc machine tool with workpiece discriminant means - Google Patents

Abstract

PURPOSE:To detect a mounting error before machining a workpiece and prevent the occurrence of a machining error by providing a discriminant means for cyclic judgment on the touch probe which contacts the workpiece and detects the shape thereof. CONSTITUTION:A touch probe 2 comprises a contactor 2a contacting a workpiece 5, a contactor body 2b movable in x-, y- and z-directions after contact with the workpiece 5 and transmitting a signal corresponding to the displacement thereof, a grip 2c and a signal generating part for an NC control device. The touch probe 2 is stored in a tool magazine 3 and coupled to a spindle 4 whenever necessary. Provided that A shows the workpiece at a finished condition, B is for a rough machining position and C for pre-rough machining position respectively, it is possible to make judgment as to which position of B or C corresponds to the workpiece 5, according to measurements by the touch probe 2 which is in contact with said workpiece 5, thereby enabling the selection of a subsequent machining process. By the application of the aforesaid constitution, a workpiece mounting error, if any, can be detected in advance and no problem occurs at the time of machining.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is suitable for mounting a specified workpiece on a specified jig specified by a program without error, determining the quality of the workpiece by 'I', or rough finishing processing of the workpiece. The present invention relates to a machining force method for a numerically controlled machine tool having one stage of workpiece discrimination in which a predetermined machining process is performed after pre-machining the workpieces, such as determining the distinction between the two.

In a conventional machine tool having numerical control, a jig is mounted on a table or a pallet according to program instructions, and a predetermined workpiece is mounted on the jig to perform machining. In this case, it is often the case that workpieces of similar shapes are mounted on jigs of the same shape, resulting in the problem that the workpieces to be mounted are mistaken.

Furthermore, when rough-cutting and finishing of a workpiece are performed separately, a malfunction may occur in which finishing is performed even though the rough-cutting of the workpiece is not yet completed.

As shown in the 4th episode, barre hl, 2 is program 1.2
The predetermined IFIs A and B are automatically or manually selected.

Next, the recognition cards A and B installed on the jigs A and B
Work A based on the voluntary judgment of humans.

Workpiece B is mounted on jigs A and B, but at this time, for example, when mounting workpiece C on jigs B and 41, a mounting error occurs.

Problems to be Solved by the Invention The present invention solves the above-mentioned problems.Prior to machining the workpiece, the shape of the workpiece is determined, installation errors are detected in advance, and the workpiece is processed after correction. It is an object of the present invention to provide a machining force method for a numerically controlled machine tool having an F stage for work discrimination.

Means for Solving the Problems For this purpose, the present invention provides a numerical control mechanism of a machine tool with a determination means that performs a determination cycle using a touch probe that comes into contact with the workpiece and detects the shape of the workpiece. This method is characterized by a machining force method that determines the shape of the workpiece before machining it.

EXAMPLES Hereinafter, examples of the present invention will be described based on the drawings. As shown in Figure 1, it is recovered by programs 1, 2, etc.) 1.2
The jigs AA, B, etc. to be placed on the workpiece are automatically determined, and as with the conventional technology described above, one person can place the jigs A, B, etc. before machining the workpiece.
Attach it to H. Thereafter, the shape of the workpiece is determined in judgment-F stage 1. If workpiece A is attached to Jt-A, it is determined that the workpiece has passed, and the predetermined processing is continued.

However, for example, when workpiece C is mounted on jig B, the judgment means 1 will issue an alarm, indicating that there has been a mounting error! IS
detected before.

Next, we will discuss the determination cycle for '1 fixed hair stage l).

A touch probe 2 as shown in FIG. 2 is used for the determination.

The touch probe 2 has a contactor 2a that contacts the workpiece, and a main body that moves in the three directions of X, Y, and Z after contacting the workpiece, and emits a signal corresponding to the moving probe. 2b
The gripping portion 2c is formed to be inserted into the main shaft or the like, and the signal generating portion 2d'i is configured to send a signal to the numerical control mechanism of the machine tool. As shown in FIG. 3, this touch probe 2 is housed in a machine tool magazine 3, and is attached to the main shaft 4 when necessary, as shown in the figure.

Next, the determination cycle will be explained.

First, the X, Y, and Z coordinates of each measurement point on the workpiece are determined. Next, the call position of each part of the workpiece is determined, and the allowable range of the thickness of the workpiece at that position is determined. The workpiece thickness of each part is determined. Dimensions can be determined. Measurements will proceed further north, but an alarm will be displayed in the following cases. That is, if no calling position is commanded, the measurement point X.

These include cases in which Y and Z coordinates are not commanded to be displayed, the thickness of the workpiece is not commanded, the touch probe 2 does not come into contact with the workpiece, and the allowable thickness of the workpiece exceeds the allowable range.

(In order to explain the discrimination cycle described in 2 in an easy-to-understand manner,
As shown in the figure, the determination of whether the workpiece 5 is roughly ground or finished will be described.

A workpiece 5 which has not been roughly ground and a workpiece 5 which has been roughly ground are attached to the jig 6, and these are carried into the machining position t of the machine.

In the figure, if position A is the completed position, position B
is the position after rough grinding, and Hc is the position before rough grinding. The touch probe 2 contacts the workpiece 5, and the measured value is ? It is determined in which state of 2B and 2C the workpiece 5 is located. As a result, the next processing step will be selected accordingly. Even if there is +1 mistake in picking up the workpiece from the north, it will be detected in advance and no problem will occur during machining.For example, if workpiece 5, which has already been machined, is brought in by 11f, an alarm will be set for position A by I. It is also possible to do C. The shape of the workpiece is also determined in the same way. For example, when similar workpieces 5 are brought in, it is possible to easily determine which workpiece 5 has been brought in by determining the workpiece thickness at a certain measurement position (single or multiple locations) and measuring this. Furthermore, measure the thickness of the workpiece and
Variations in workpieces and defective products can be easily detected. If a printer is installed at stage R by R, the measured value (workpiece thickness j4), the type of work determined, and the program number to be called next''!
? You can also print it out.

Effects of the Invention As described above, according to the present invention, the shape, condition, etc. of the workpiece can be grasped before machining the workpiece, mistakes in mounting the workpiece can be reliably discovered, and the machining process can be proceeded with the mistake in mounting the workpiece. It is possible to perform highly @1 processing without any problems, and it also has the effect of improving work efficiency.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a plan view of a touch probe used for discrimination, Fig. 3 is an explanatory diagram for explaining the discrimination method, and Fig. 4 is a block diagram of a conventional technique. It is. ■-...Hiraibetsu f continuation, Part 2...Touch probe, 3
豐... Ldan Magazine, 4 yari-・kai main axis, 5 ＊ ＊
e *Work, 6.1111. jig. 1,200 spears 3

Claims (1)

[Claims] In the processing method of a numerically controlled machine tool, which processes the workpiece by identifying the table or the specified workpiece to be attached to a specified jig placed on a pallet and confirming the rough cutting or finishing condition of the workpiece, the workpiece thickness, etc. In order to check the shape of the workpiece before processing the workpiece, a touch probe formed to contact the workpiece and detect the shape of the workpiece is engaged with the workpiece, and the workpiece is identified based on the signal of the touch probe. A processing method for a numerically controlled machine tool having a workpiece discriminating means, wherein the numerical control mechanism of the machine tool is provided with a discriminating means for performing a discriminating cycle for such purposes.