JPH04310351A - Tool life control device - Google Patents

Abstract

PURPOSE:To enhance the control of tool life by computing the cutting time and the average load value, then registering the cutting capacity and the cutting applicable time, and multiplying the coefficients, obtained from the average load value and the cutting capacity, by the cutting time to compare the obtained specification conversion time with the cutting available time. CONSTITUTION:In a means T for computing/storing the actual result at the cutting time, the cutting time is integrated, and the load value to a spindle during that time, that is, the load value concerning a tool, is stored. The average value of the load value applied to the tool is computed simultaneously with the cutting termination of the tool. As a result, the cutting integrated time and the average load value are obtained by the means T. The actual use result of the tool is then computed by a means V after judging the removal of the tool by a tool removal judging block V. In this case, the cutting capacity and cutting time are previously registered by a tool capacity data registering means W before machining, and in the means V, the coefficients of the average load value obtained by the means T and the cutting capacity registered in the means W are obtained and multiplied by the cutting time in the means T to obtain the use conversion time. The tool life Y is then obtained by a comparing means X.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to tool life management for machine tools.

0002

[Prior Art] Conventional tool life management involves integrating the usage time and number of times a tool is used, and comparing it with a set time and number of times, as shown in Figure 2. If the set value is exceeded, the life of the tool is reduced. It is determined that it has run out.

In other words, when tool life is managed in terms of time as shown in FIG. B), the usage time during cutting is accumulated (block C), the machining is finished (block E) by determining whether the tool has been removed (block D), and it is determined whether the tool usage time is equal to or greater than the set time (block F
), if it is equal or larger, it is the tool life (block G
) is a thing.

[0004] Furthermore, when the tool life is managed by the number of times as shown in FIG. b), determine whether to remove the tool after cutting (block c), and then finish machining (block d)
Then, the number of times the tool is used is accumulated (block e), and it is determined whether the number of times the tool is used is greater than or equal to the set time (block f).
), if it is equal to or greater than the tool life (block g)
It is something.

[0005]

[Problem to be Solved by the Invention] However, regarding the determination of the usage time mentioned in the former, even if the machining time is the same depending on the workpiece, machining conditions, machining method, etc., the actual state of wear of the tool differs. There is a problem that the tool life is different. In addition, regarding the latter number of times the tool is used, unless the same workpiece is being machined, the state of tool wear during one machining process is also different, so there is a problem that it differs from the actual tool life.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a device that accurately detects the actual tool life and manages the tool life.

[0007]

[Means for Solving the Problems] The present invention, which achieves the above-mentioned objects, provides a means for determining a cutting time and an average load value, a means for registering a cutting capacity and a possible cutting time, and a means for determining the cutting capacity and the cutting capacity. and means for multiplying the coefficient obtained by the cutting time by the cutting time and comparing the result with the cutting possible time.

[0008]

[Operation] The means for determining the cutting time and average load value is a means for storing and calculating the actual load during cutting, and stores the load value and machining time during machining and also determines the average load value during machining. Next, the registration means registers the ability data of the tool, and registers the cutting ability (load) and available cutting time for each tool. In addition, as a means to calculate and judge the tool usage record, the usage conversion time is calculated by multiplying the cutting time by a coefficient calculated from the average load value during cutting and the cutting capacity (load) of the tool, and this usage This is to compare the converted time and usable time. As a result, tool life management becomes possible.

[0009]

Embodiment An embodiment of the present invention will now be described with reference to FIG. FIG. 1 shows a lifespan determination flow, and each means will be described while explaining this flow. The life determination flow includes a block R for determining attachment of the tool TXX to the spindle, a block S for determining cutting after attachment, and a means T for storing and calculating cutting results.

This means T is as shown in the block,
The cutting time is integrated, and the load value on the spindle during this time, that is, the load value related to the tool TXX is stored. Then, at the end of tool cutting, the average value of the load values applied to the tool is calculated. As a result, the means T can obtain the cumulative cutting time and the average load value.

[0011] Next, in a tool removal judgment block U, a removal judgment is made, and then in a block V, the usage history of the tool is calculated. In this case, first, the means W for registering tool capacity data is used to determine the cutting capacity (load) and cutting time (Hr) before each machining process.
) is registered in advance. Then, in block V, a coefficient of the average load value obtained by the means T and the cutting capacity (load) of the means W is determined, and this coefficient is multiplied by the cutting time of the means T to obtain the usage conversion time.

[0012] Next, in the means
).

[0013]

[Effects of the Invention] As explained above, according to the present invention, instead of the conventional life management based on simple processing time or the accumulation of the number of uses, life management can be performed based on the processing results, that is, the usage time converted from the load value. This makes it possible to manage tool life with a more reliable and accurate grasp of tool wear conditions.

[Brief explanation of drawings]

FIG. 1 is a lifespan determination flowchart for an embodiment of the present invention.

FIG. 2 is a conventional lifespan determination flowchart, in which (a) shows the usage time and (b) shows the number of usages.

[Explanation of symbols] T Means for storing and calculating cutting results V Means for calculating tool usage results W Means for registering tool ability data

Claims (1)

[Claims] 1. Means for determining a cutting time and an average load value, means for registering a cutting capacity and a machinable time, and a means for multiplying the cutting time by a coefficient obtained from the average load value and cutting capacity. A tool life management device characterized by: means for comparing with the machinable time.