JP2000317769A - Numerically controlled device with function for controlling feed of cutting liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the periphery of a machine tool from being stained more than necessary by a fed cutting liquid by providing a means calculating the distance between a tool position and the machining position of a workpiece on a numerically controlled device, and instructing a stop of the feed of the cutting liquid when the calculated distance is larger than a prescribed value. SOLUTION: A tool position detection section 10 detects the position of a tool from the result analyzed by a numerical control information analysis section 6. Data corresponding to the machining position of a workpiece are stored in a machining position data storage section 11. A distance data calculation section 12 calculates a distance from the tool position data detected by the tool position detection section 10 and the machining position data stored in the machining position data storage section 11 and transmits the result to a cutting liquid feed control section 8. The cutting liquid feed control section 8 implements a process to instruct a stop of the feed of the cutting liquid when the distance data calculated by the distance data calculation section 12 are larger than a prescribed value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical controller having a function of controlling the supply of a cutting fluid such as water or oil for lubrication, cooling or cleaning supplied when machining a workpiece.

[0002]

2. Description of the Related Art When a workpiece is machined using a machine tool, it is necessary to supply a cutting fluid such as water or oil to the workpiece. Using a switch button or the like on the operation panel of the device, prepare an external input device for instructing whether or not to supply cutting fluid, or supply a cutting fluid supply command in numerical control information read by the numerical controller. And a cutting fluid stop command is prepared to control the supply of the cutting fluid. In the conventional numerical controller, upon receiving the above-described command for supplying the cutting fluid, the control for supplying the cutting fluid is immediately executed regardless of the position of the machining axis or the position of the tool.

FIG. 4 is a block diagram showing an example of the configuration of a conventional numerical controller. Among them, the CPU 1 connected by the bus line, the numerical control information input device control unit 2,
Cutting fluid supply command input device control unit 4, numerical control information analysis unit 6, numerical control information storage unit 7, cutting fluid supply control unit 8, and numerical control information input device 3 connected to numerical control information input device control unit 2. A cutting fluid supply command input device 5 connected to the cutting fluid supply command input device control unit 4 and a cutting fluid supply driving unit 9 connected to the cutting fluid supply control unit 8 constitute a conventional numerical controller. In addition, the tool position detection unit 10
A conventional numerical controller is also connected to a bus line for performing control unrelated to the present invention.

[0004] The CPU 1 controls the operation of each unit connected to the bus line and mediates data transfer.

Means for externally instructing the numerical control device to supply and stop the cutting fluid to the numerical controller includes a method of instructing by a command for controlling the supply of the cutting fluid described in the numerical control information; There are two methods of instructing from the cutting fluid supply command input device 5.

First, a description will be given of a control in a case where a command to supply and stop the cutting fluid is instructed by a command for controlling the supply of the cutting fluid described in the numerical control information. The numerical control information is input via the numerical control information input device 3 controlled by the numerical control information input device control unit 2 and stored in the numerical control information storage unit 7. The stored numerical control information is analyzed by the numerical control information analysis unit 6. When each command constituting the numerical control information analyzed by the numerical control information analysis unit 6 includes a command to control the supply of the cutting fluid, the content is transmitted to the cutting fluid supply control unit 8,
The cutting fluid supply control unit 8 controls the supply of the cutting fluid via the cutting fluid supply driving unit 9.

Next, a description will be given of the control in the case where a command to supply and stop the cutting fluid is issued from the cutting fluid supply command input device 5. The cutting fluid supply command input device 5 is generally prepared by using a switch button or the like on an operation panel or the like of the numerical control device in a generally well-known numerical control device. It goes without saying that there are things other than forms. The command to supply and stop the cutting fluid is input via a cutting fluid supply command input device 5 controlled by the cutting fluid supply command input device control unit 4. The content is transmitted to the cutting fluid supply control unit 8, and the cutting fluid supply control unit 8
The supply of the cutting fluid is controlled via the cutting fluid supply drive unit 9.

As described above, in either case, when the command for controlling the supply of the cutting fluid is transmitted to the cutting fluid supply control unit 8, the supply and the stop of the cutting fluid are immediately performed via the cutting fluid supply driving unit 9. Will be implemented.

However, the original purpose of supplying the cutting fluid is to lubricate the workpiece and the tool, to cool the heat generated when the workpiece is machined, and to clean the cutting chips. There is no need to supply cutting fluid during non-cutting. When the cutting fluid is supplied irrespective of the position of the machining axis or the position of the tool as in a conventional numerical control device, the cutting fluid is supplied even if the tool position is far away from the workpiece. As a result, there is a problem that not only a wasteful cutting fluid is supplied at the time of non-cutting of the workpiece, but also the periphery of the machine tool is unnecessarily stained by the supplied cutting fluid.

Of course, numerical control information such as supplying the cutting fluid immediately before cutting the workpiece and stopping the cutting fluid immediately after the end of the cutting is prepared, and prepared on the operation panel of the numerical control device. Using an external input device that instructs whether or not to supply the cutting fluid, it is possible to perform an operation corresponding to the numerical control information, but in that case, a creator of the numerical control information or a machine operator, The start and end of each machining are determined, and a command to supply and stop the cutting fluid is issued each time.

[0011]

As described above, the conventional numerical control apparatus supplies the cutting fluid immediately upon receiving the cutting fluid supply command regardless of the position of the machine axis or the position of the tool. However, there is a disadvantage that the cutting fluid is supplied even if it is far away from the workpiece. Further, the above-mentioned drawbacks have caused a problem of supplying wasteful cutting fluid when the workpiece is not cut and a problem of unnecessarily soiling the periphery of the machine tool with the supplied cutting fluid. The problem to be solved by the present invention is to eliminate the drawbacks and problems of the prior art.

[0012] In the conventional numerical controller, numerical control information such as supplying a cutting fluid immediately before cutting a workpiece and stopping the cutting fluid immediately after the end of cutting is also provided. Using an external input device that instructs whether to supply the prepared cutting fluid to the operation panel, etc.,
By performing the operation corresponding to the numerical control information during machining, it is possible to avoid the problem to be solved by the present invention, but in this case, the creator of the numerical control information and the machine operator, The start and end of each processing is determined in the process unit necessary for all the processing of the workpiece, and the time and effort for instructing the supply and stop of the cutting fluid each time are required. Further, the work of instructing the supply and stop of the cutting fluid as described above many times whenever necessary, not only requires a lot of trouble but also causes a human error.

[0013]

In order to achieve the above object, the present invention provides a tool position and information corresponding to the tool position,
Information corresponding to the machining position of the workpiece and the machining position of the workpiece,
Alternatively, the present invention is characterized in that the numerical controller controls the supply of the cutting fluid by using information indicating that the workpiece is being machined.

According to the first aspect of the present invention, the numerical controller has means for calculating a distance between the tool position and the machining position of the workpiece. If the calculated distance is larger than a predetermined value, , And instructs to stop the supply of the cutting fluid.

Next, according to the present invention, means for setting a region indicating a machining position of a workpiece in the numerical controller and whether the tool position is inside or outside the set region. Is determined, and when the tool position is outside the above-mentioned area, an instruction to stop the supply of the cutting fluid is issued.

According to a third aspect of the present invention, when the distance between the tool position and the machining position of the workpiece is calculated by the numerical controller according to the first aspect, an axis movement command described in the numerical control information is used. To determine the processing position of the workpiece.

According to the fourth aspect of the invention, except for the case where the numerical controller executes the cutting feed, an instruction to stop the supply of the cutting fluid is issued.

As described above, according to the present invention, it is possible to supply the cutting fluid only when the tool position is near the workpiece. Further, according to the third or fourth aspect of the present invention, the object can be achieved more effectively by using the numerical control information as the information for determining the cutting fluid supply control.

[0019]

FIG. 1 is a block diagram showing an example of a numerical controller according to the present invention. Using this figure,
An embodiment of the control according to the first and third aspects of the present invention will be described. The same components as those of the conventional numerical control device are denoted by the same reference numerals, and description thereof will be omitted.

In the numerical control device of the present invention, a block of a tool position detecting unit 10, a processing position data storing unit 11, and a distance data calculating unit 12 are added to the conventional numerical control device. The tool position detecting unit 10 may be added to a conventional numerical controller for the purpose of performing control unrelated to the present invention, but a block which is indispensable for realizing the present invention. Becomes The tool position detecting unit 10 is provided with a command for controlling the tool position or a command corresponding to the command constituting the numerical control information analyzed by the numerical control information analyzing unit 6 when the command is included in the command. The tool position detector 10 detects the position of the tool that is currently operating. The tool position here is not limited to the position of the tool used for actual machining, but represents all data that changes following the change of the tool position, such as the position of the machine axis where the tool is mounted. Is supplemented. Also, here, an example in which the position of the tool is detected from the result of analyzing the numerical control information has been described, but it is needless to say that the tool position data can be detected using other general techniques. Incidentally, as an example of other means for detecting tool position data, there is an example of detecting the position of a tool based on position measurement data transmitted from a position measurement device attached to an actual tool, a work axis, or the like. .
The processing position data storage unit 11 stores data corresponding to the processing position of the workpiece. Distance data calculation unit 12
Then, the distance between the tool position data detected by the tool position detection unit 10 and the processing position data stored in the processing position data storage unit 11 is calculated, and the result is transmitted to the cutting fluid supply control unit 8. In addition to the control performed by the conventional numerical controller, the cutting fluid supply controller 8 stops the supply of the cutting fluid when the distance data calculated by the distance data calculator 12 is larger than a predetermined value. Execute the specified process.

In this way, the invention according to claim 1 is carried out. In the numerical control device according to claim 3, when calculating the distance between the tool position and the machining position of the workpiece, It is an object of the present invention to more effectively realize the invention described in claim 1 by using the axis movement command described in the control information. In the numerical control device shown in FIG. New processing is added to the control executed in step 6, and data corresponding to the processing position of the workpiece is stored in the processing position data storage unit 11. That is, the numerical control information analysis unit 6 analyzes the numerical control information stored in the numerical control information storage unit 7 and determines the processing position of the workpiece based on the axis movement command included in the numerical control information. The result is transmitted to the processing position data storage unit 11 and stored.

The block diagram shown in FIG. 1 shows an example of the numerical controller according to the present invention, and it goes without saying that the present invention can be realized with a different configuration.

FIG. 2 is a block diagram showing an example of the numerical controller according to the second aspect of the present invention. An embodiment of the control according to the second aspect of the present invention will be described with reference to FIG. The same components as those of the conventional numerical control device are denoted by the same reference numerals, and the description is omitted.

In the numerical control device according to the second aspect of the present invention, the block of the tool position detection unit 10, the machining region data storage unit 15, and the tool position existence region determination unit 16 is different from the conventional numerical control device. Is added. When data to be stored in the machining area data storage unit 15 is externally set in the numerical control device, a machining area data input device control unit 13 and a machining area data input device 14 are also added. Is not an essential block for the present invention. The description of the tool position detector 10 is omitted because it executes the same processing as that of the numerical controller of FIG. The processing area data storage unit 15 stores area data corresponding to a processing position of a workpiece. As an example of means for setting the area data, the numerical controller inputs desired data from outside the numerical controller via the machining area data input device 14 controlled by the machining area data input device controller 13. And processing area data storage unit 1
5, but any other data setting means can be used in the present invention. In the tool position existence area determination unit 16, whether the tool position data detected by the tool position detection unit 10 is inside or outside the area indicated by the processing area data stored in the processing area data storage unit 15. Is determined, and the result is transmitted to the cutting fluid supply control unit 8. Cutting fluid supply controller 8
In addition, in addition to the control performed by the conventional numerical controller, the supply of the cutting fluid is stopped only when the result determined by the tool position existence area determination unit 16 is determined to be outside the area. Is executed.

The block diagram shown in FIG. 2 shows an example of the numerical controller according to the present invention, and it goes without saying that the present invention can be realized with a different configuration.

According to the fourth aspect of the present invention, the control executed by the numerical control information analyzer 6 and the cutting fluid supply controller 8 is the same as that of the conventional numerical controller shown in FIG. This can be achieved by adding new processing. The numerical control information stored in the numerical control information storage unit 7 is analyzed by the numerical control information analysis unit 6 as conventionally performed. When analyzing the numerical control information, the numerical control information analysis unit 6 also analyzes whether or not each command constituting the numerical control information is one that instructs a cutting feed, and determines the result as a cutting fluid supply control. The information is transmitted to the unit 8. Note that the above-described analysis process is a process that is commonly performed when a general numerical controller controls a machining axis. However, until now, it is not possible to transmit the result to the cutting fluid supply control unit 8. Not done. In the cutting fluid supply control unit 8, in addition to the control performed by the conventional numerical control device, except for the case where the command analyzed by the numerical control information analysis unit 6 indicates the cutting feed, the cutting fluid supply is controlled. A process for instructing stop is executed.

FIG. 3 shows an example of numerical control information for operating the numerical control device of the present invention. Using this, the relationship between the process in which the numerical control device of the present invention executes numerical control information and operates and the operation content of the cutting fluid supply control at that time will be described. The commands constituting the numerical control information described in the present numerical control information example will be described first. G00 is a rapid feed command, G01 is a cutting feed command, M0
Reference numeral 8 denotes a cutting fluid supply start command. X, Y,
Z and the number following them mean a position control command for each machining axis. For example, when commanded as X100, X
The tool moves to the position of 100 with respect to the axis. N at the head of each line and the number following it are sequence numbers assigned to recognize the line, and no special control is performed by the numerical controller.

According to the numerical control information shown in FIG. 3, the machining of the workpiece is started from the sequence N07 in which the G01 command appears, and the machining positions at that time are X = 10, Y = 10, Z = 15.
It turns out that is. The tool position at the time of executing the sequence N03 in which the M08 command is executed is X = 300, Y =
300, Z = 500, and the distance between the tool position and the processing position at this time is 635.157. By the way, in the conventional numerical control device, the supply of the cutting fluid is started when the M08 command is issued in the sequence N03.

First, consider an operation of instructing to stop the supply of the cutting fluid when the distance between the tool position and the machining position is one of the numerical controllers according to the present invention, which is larger than 5.
Even if the M08 command is issued in the sequence N03, the distance between the tool position and the processing position at this time is 635.157 as described above, and since the distance is larger than 5, the supply of the cutting fluid is suppressed. Becomes The distance between the tool position and the processing position becomes smaller than 5 after the execution of the command in sequence N05, and at this time, the supply of the cutting fluid is started for the first time. The supply of the cutting fluid is suppressed again during the execution of the sequence N10 in which the machining is completed and the distance between the tool position and the machining position is larger than 5. Except for the case where the distance between the tool position and the processing position is smaller than 3, in the operation for instructing to stop the supply of the cutting fluid, the position of the Z-axis is When the value becomes 18, the supply of the cutting fluid is started for the first time.

Next, one of the numerical control devices of the present invention, a means for setting an area indicating a processing position of a workpiece, a means for determining whether a tool position is inside or outside the set area, For a numerical control device provided with a means for supplying a cutting fluid when the tool position is within the above-mentioned area, the area indicating the processing position of the workpiece is represented by points X = −80, Y = 0, Z = 0. And a rectangular parallelepiped having a diagonal line connecting points X = 280, Y = 280 and Z = 20. When the numerical control information is executed from the beginning, after the command in sequence N05 has been executed, the tool position is X = 10, Y = 1.
When the tool reaches the position of 0, Z = 20, the tool enters the set area for the first time. At this point, it is determined that the tool position is inside the area, and the supply of the cutting fluid is started. The supply of the cutting fluid is suppressed again when the command in the sequence N10 in which the tool position moves to the outside of the set area is being executed, and the tool position at that time is X = −50, Y =
150 and Z = 20.

Also, in the numerical control device which is one of the numerical control devices of the present invention and instructs to stop the supply of the cutting fluid except when executing the cutting feed, the M08 command is issued in the sequence N03. However, at this time, the supply of the cutting fluid remains suppressed. Sequence N07
When the G01 command is executed in, the supply of the cutting fluid is started because the cutting feed mode is set for the first time, and in the sequence N10, the supply of the cutting fluid is suppressed again because the cutting feed mode is stopped by the G00 command. Become.

[0032]

As described above, according to the numerical controller having the function of controlling the supply of the cutting fluid of the present invention, information corresponding to the tool position and information corresponding to the machining position of the workpiece are stored. Since the supply control of the cutting fluid can be performed in consideration of the above, it is possible to suppress the supply of the cutting fluid when the tool position is located far from the workpiece. As a result, it is possible to prevent problems such as supplying wasteful cutting fluid during non-cutting of the workpiece and unnecessarily soiling the periphery of the machine tool with the supplied cutting fluid.

The creator of the numerical control information or the machine operator creates numerical control information such as supplying the cutting fluid immediately before cutting the workpiece and stopping the cutting fluid immediately after the end of the cutting, and By using an external input device for instructing whether to supply the prepared cutting fluid to the operation panel or the like of the numerical control device, it is possible to eliminate the trouble of performing the operation corresponding to the numerical control information during processing. It becomes possible, and it becomes possible to prevent human error caused by such work.

The cutting fluid described in describing the present invention refers to the lubrication of a workpiece and a tool, and the heat generated when machining a workpiece in a generally well-known numerical controller. It is a general term for all materials supplied for the purpose of cooling or cleaning chips, etc., not only representing liquid, but also gas or solid, mixing liquid and gas. Of course, it may be a mist.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a numerical control device according to the present invention.

FIG. 2 is a block diagram showing a configuration of a numerical control device according to the present invention.

FIG. 3 is an example of numerical control information prepared for explaining the operation of the numerical control device of the present invention.

FIG. 4 is a block diagram showing a configuration of a conventional numerical control device.

[Explanation of symbols]

1 CPU, 2 numerical control information input device control unit, 3 numerical control information input device, 4 cutting fluid supply command input device control unit, 5 cutting fluid supply command input device, 6 numerical control information analysis unit, 7 numerical control information storage unit , 8 cutting fluid supply control unit, 9 cutting fluid supply drive unit, 10 tool position detection unit, 1
1 processing position data storage unit, 12 distance data calculation unit,
13 processing area data input device control unit, 14 processing area data input device, 15 processing area data storage unit, 16
Tool position existence area determination unit.

Claims (4)

[Claims] 1. A numerical control device having a function of controlling supply of a cutting fluid such as water or oil supplied when processing a workpiece, means for calculating a distance between a tool position and a processing position of the workpiece. And a means for instructing stop of the supply of the cutting fluid when the calculated distance is larger than a predetermined value. 2. A numerical control device having a function of controlling the supply of a cutting fluid such as water or oil supplied when processing a workpiece, means for setting a region indicating a processing position of the workpiece, and a tool. Numerical control comprising means for determining whether the position is inside or outside the set area, and means for instructing stop of the supply of the cutting fluid when the tool position is outside the area, apparatus. 3. The numerical control device according to claim 1, wherein the means for calculating a distance between the tool position and the processing position of the workpiece determines the processing position of the workpiece based on an axis movement command described in the numerical control information. A numerical control device characterized by making a judgment. 4. A numerical control device having a function of controlling the supply of a cutting fluid such as water or oil supplied when machining a workpiece, except for executing a cutting feed. Numerical control device characterized by having means for instructing the stop of the operation.