JPS61190606A - Working discriminating method for workpiece - Google Patents

Abstract

PURPOSE:To detect accurately and easily whether a workpiece is already worked or not, by measuring preliminarily the weight of the workpiece before working and setting this weight as a reference value and measuring the weight of each work at the working time and comparing this measured weight with said reference value. CONSTITUTION:A weight measurer 3 is provided in a conversion position of a subloader 2, and a saucer 3a and the surface of the subloader 2 are leveled. Before discriminating whether a work 4 is already worked or not, the measured value measured by the weight measurer 3 is stored preliminarily as the reference value in a register of a controller. At the discrimination time, works 4 worked by a hobbing machine are carried to the subloader 2 and are placed on the saucer 3a successively at a certain timing. The weight of the work 4 is measured by the weight measurer 3 and is compared with the preliminarily stored reference value by the controller. If the reference value is larger than the measured value, it is discriminated that the work 4 is already worked. If it is discriminated that the work 4 is not worked yet, the work 4 is worked again.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a workpiece machining determination method.
This method measures fi to determine whether or not the workpiece is being machined.

<Prior Art> As shown in FIG. 3, a workpiece is supplied to the hob 21 by a workpiece supplying device such as a sub-loader 2. After the work is placed at the exchange position 2a of the sub-loader 2,
The workpiece is conveyed by the sub-loader 2 and set at the machining position i2b, where it is machined by a hobbing machine, and the further machined workpiece is conveyed again by the sub-loader 2 and returned to the exchange position 2a. At the exchange position 2a, an exchange operation is performed in which a processed workpiece is taken out and an unprocessed workpiece is placed thereon. This replacement work is performed manually or automatically by an autoloader.

As mentioned above, when a workpiece is fed to a machine tool by the workpiece feeding device, it is checked whether the workpiece is processed or unprocessed at the exchange position 2a in order to prevent duplicate machining and discharge of unprocessed parts. It is necessary to distinguish between them.

Conventional techniques for detecting the amount of processed phosphorus include mechanical methods such as interlocking with a master work, and methods such as electrically storing the processing history.

<Problems to be solved by the invention> By the way, the mechanical method requires a limitation on the processed products and lacks versatility. Especially for general purpose hobbing machines.

There are many problems because the target processed products come in many different sizes, thick and thin, and the history storage method loses memory in the event of a power outage. Alternatively, there are drawbacks such as incorrect judgments if the memory goes awry.

*In view of the prior art described in 1.1, an object of the invention is to provide a processing discrimination method that accurately and easily detects whether processing has been completed or not.

<Means for Solving the Problems> The present invention, which achieves the above object, measures the weight of the workpiece to be machined with a machine tool in advance, stores it as a reference value, and measures the weight of each workpiece one by one during machining. The method is characterized in that it is determined whether the workpiece is processed or unprocessed by measuring the measured value and comparing the measured value with the reference value.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 and 2.

As shown in FIG. 1, in this embodiment, a weight measuring device 3 is provided at the replacement position of the sub-loader 2, and the surface of the receiving tray 3a of the weight measuring device 3 and the surface of the sub-loader 2 are made equal to each other. , a small, high-precision electronic type is used. When the workpiece 4 is placed on the tray 3a, the weight of the workpiece 4 is measured by the weight measuring device 3, and the measured value is stored in a register of a control device (not shown).

Before making the determination, the driver places the unprocessed workpiece 4 on the tray 3a and presses the weight registration button.

Then, as shown in FIG. 2, the measured value measured by the weight measuring device 3 is stored in the register of the control device as a reference value.

The determination is made as follows. That is, the workpiece 4 processed by the bob machine 2 is transported by the subloader 2, and the weight measuring device 3, which is placed on the tray 3a one after another at a certain timing, measures the weight of the workpiece 4 each time it is placed. The measured value is sent to a register and stored. In the control device,
Each measured value sent one after another is compared point by point with a pre-stored reference value. When the relationship ``reference value > measured value'' holds, it is determined that the workpiece 4 has been processed, and when the above relationship does not hold, it is determined that the 7-ri 4 is unprocessed. This determination is possible because the workpiece 4 is cut when machining is performed, and its weight is reduced by the amount of the cut.

When determining that the workpiece 4 has been processed, the control device outputs a processed signal and discharges the workpiece 4 to the next process. On the other hand, when it is determined that the workpiece is unprocessed, an unprocessed signal is output, and the workpiece is operated to be reprocessed or not to be discharged to the primary process.

By carefully analyzing the deviation values of the measured values, it is possible to detect the quality of the material or the quality of the processed phosphorus content.

When the type of workpiece 4 is changed, the determination can be made in the same manner as described above by simply resetting the reference values.

<Effects of the Invention> As specifically explained above in conjunction with the embodiments, the present invention provides the following effects.

lj) Once the machine operator has decided on the workpiece, he or she can handle large and small, thick and thin, and various types of products in the same way by simply pressing the registration button for standard heavy stitching only once. .

■ Small gears and thin gears on modules can be detected reliably.

l■ The mechanical structure is simple and can be easily applied.

The weight data obtained from the measuring device can also be used for sorting out abnormally processed products, detecting abnormalities, etc.

If the reference value for each processing machine type is registered in advance, it can also be used to detect the machine type, and since the machine program can be automatically selected, it is also possible to process a mixture of multiple models.

[Brief Description of the Drawings] Fig. 1 is a configuration diagram showing an apparatus for realizing the present invention, Fig. 2 is a flow diagram showing the operating procedure of the present invention, and Fig. 3 shows the arrangement of a work supply device and a machine tool. FIG. Inside the drawing. 1 is a hobbing machine, 2 is a sub loader. 2a is the exchange position, 3 is the weight measuring device. 4 is the work.

Claims (1)

[Claims] By measuring the weight of the workpiece to be machined by the machine tool in advance and storing it as a reference value, measuring the weight of each workpiece during machining and comparing this measured value with the reference value, the workpiece can be checked. A method for determining processing of a workpiece, characterized by determining whether the workpiece is processed or unprocessed.