JPH0588729A - Previously announcing method for tool lifetime and drilling numerical controller - Google Patents

Abstract

PURPOSE:To prevent the interruption of a drilling process of a drilling numerical controller. CONSTITUTION:A drilling process program is read out of a data input part 101 for retrieving the number of holes of each tool of a machining program before the execution of a drilling process. An arithmetic processing part 102 extracts a drilling operation component and a hole number monitoring part 105 integrates the number of holes of each tool included in the machining program. When the read of the machining program is complete, a tool lifetime deciding part 108 compares the hole number data on a tool-based hole number storage part 107 with that on a tool lifetime storage part 106 to decide the short of the tool lifetime. Thus it is possible to prevent the interruption of the drilling process due to the tool lifetime based on the deciding result of the tool lifetime.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for drilling in which a table is moved to a drilling position in the XY axis directions based on a drilling position movement command instructed by a machining program and drilled in the Z axis direction. The present invention relates to a numerical control device and a tool life advance notice method.

[0002]

2. Description of the Related Art Referring to FIG.
A drilling program, positioning data, etc. are read and output to the arithmetic processing unit 102.

The arithmetic processing unit 102 is a data input unit 101.
Drilling XY from the positioning data etc input from
Create axis positioning amount, Z-axis feed rate, Z-axis feed amount, etc.
This is transferred to the servo motor control unit 103.

The servo motor control unit 103 receives the drilling XY axis positioning amount, Z, received from the arithmetic processing unit 102.
Rotate the servo motor 104 to the arithmetic processing unit 102 after confirming the end of rotation by sending an appropriate amount of pulses to the servo motor based on the axis feed speed, Z axis feed amount, etc. Notify the end.

When the arithmetic processing unit 102 receives the rotation end notification of the servo motor 104 from the servo motor control unit 103, the arithmetic processing unit 102 requests the hole number monitoring unit 105 to confirm the service life of the tool used at that time.

When the arithmetic processing unit 102 is requested by the arithmetic processing unit 102 to confirm the life of the tool used at the time, the hole number monitoring unit 105 refers to the tool life data stored in the tool life storage unit 106, The arithmetic processing unit 102 is notified of the presence / absence of a tool life and the presence / absence of a tool with the same diameter that has a remaining life.

The arithmetic processing unit 102 includes a perforation monitoring unit 105.
If it is judged that there is no remaining life of the tool in use,
Repeat the following. If the tool in use has no life and there is no other tool with the same diameter that has a remaining life, the message display unit 109
Informs that the tool has no life and stops the device. If the tool in use has no remaining life, but there is another tool with the same diameter that has a remaining life, start the tool replacement program and replace it with a tool with the same diameter and a remaining life.

The positioning data and the like are received again from the data input unit 101, and the drilling XY-axis positioning amount, Z-axis feed speed, Z-axis feed amount, etc. are created, and the servo motor control unit 10
Hand over to 3.

[0009]

The above-described conventional numerical control device for drilling notifies the operator that the tool life has run out after the tool life is confirmed by the hole number monitoring unit 105 during drilling. When the tool life is actually reached, the worker notices the tool life message etc. and replaces the tool, and the drilling work is continued until the numerical control device for drilling is restarted. There was a problem that the productivity was remarkably reduced due to the interruption.

An object of the present invention is to provide a tool life advance notice method and a numerical control device for drilling, which prevent waste of time.

[0011]

In order to achieve the above-mentioned object, a tool life advance notice method according to the present invention uses a servo motor for XY axis control with a pulse amount corresponding to a drilling position movement command according to a predetermined machining program. In the numerical control device for drilling that controls the positioning of the table etc. and then controls the Z-axis control servo motor with the pulse amount corresponding to the drilling command to perform the drilling operation, before performing the actual machining, Check the tool life shortage from the number of holes (or machining length) for each tool commanded by the machining program and the tool life data corresponding to multiple tools, and interrupt the machining due to the tool life in advance. It is foretold.

Further, when confirming the shortage of the tool life, the processing required for the drilling operation is maintained in a stopped state.

Further, in the numerical control apparatus for drilling according to the present invention, the servo motor for controlling the XY axes is controlled by the pulse amount corresponding to the drilling position movement command according to a predetermined machining program to position the table or the like. A numerical control device for drilling, which performs a drilling operation by controlling the Z-axis control servomotor with a pulse amount corresponding to a drilling command,
Tool life storage section that holds tool life data corresponding to multiple tools, tool-specific hole number storage section that stores the number of holes (or machining length) for each tool instructed by the machining program, and tool life The tool life determination unit compares the data in the setting storage unit with the data in the tool-specific hole number storage unit and determines the shortage of the service life of each tool.

[0014]

[Operation] Before performing actual machining, the number of holes in each tool used in the machining program and the service life of multiple tools held by the drilling machine are automatically checked for insufficient tool life. Prevent interruptions.

[0015]

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

FIG. 1 is a block diagram showing an embodiment of a numerical control apparatus for drilling according to the present invention.

In FIG. 1, in the present embodiment, according to a predetermined machining program, the XY-axis controlling servomotor is controlled by a pulse amount corresponding to the drilling position movement command to position a table or the like, and then the drilling command is issued. A numerical control device for drilling, which controls a Z-axis controlling servomotor with a pulse amount corresponding to, to perform a drilling operation, including a tool life storage unit 106 for holding tool life data corresponding to a plurality of tools, and a machining operation. Number of holes (or machining length) for each tool in the program
Of the number of holes for each tool to be stored and compared with the data of the tool life storage unit 106 and the data of the number of holes for each tool storage unit 107 to determine the shortage of the life of each tool. Section 108.

The other structure is the same as the conventional one.

Before drilling in FIG. 1, in order to retrieve the number of holes for each tool in the machining program, the drilling program, positioning data and the like are read from the data input unit 101 and output to the arithmetic processing unit 102.

The arithmetic processing unit 102 is a data input unit 101.
The component of the drilling operation is extracted from the positioning data and the like input from the, and the hole number monitoring unit 105 is requested to manage the life data of each tool.

In the drilling monitoring unit 105, the life of each tool used in the machining program is stored in the tool-specific hole number storage unit 107 of the machining program, and then the arithmetic processing unit 102.
Transfer processing to.

Until the data analyzed by the arithmetic processing unit 102 confirms the end of the machining program, the number-of-holes monitoring unit 105 is requested to manage the number of holes for each tool in the machining program each time the component of the drilling operation is searched. ..

When the arithmetic processing unit 102 detects "M02" which is the end of the machining program, the tool life discriminating unit 108
First, request the comparison of the life of each existing tool and the life of the tool used in the machining program.

In FIG. 2, the tool life discrimination unit 108
The data of the tool life storage unit 106 and the data of the tool-specific hole number storage unit 107 of the machining program are compared, and the tool number is T.
For tool i, the number of holes for each tool in the machining program is 10
The number of holes mi instructed in the machining program stored in No. 7 is compared with the life ni holes managed by the numerical control device stored in the tool life storage unit 106.

If mi> ni, the life of the mi-ni holes is insufficient, so the arithmetic processing unit 102 is notified that the life of Ti is insufficient.

The arithmetic processing unit 102 includes a tool life determining unit 10
8 received the comparison result of the data of the tool life storage unit 106 and the data of the tool-specific hole number storage unit 107 of the machining program, from which it was determined that the life value of each tool was less than the required amount for machining. In this case, the message display unit 109 is notified of the number of the tool whose life is insufficient,
Request message display on the display screen associated with the numerical control device for perforation.

The operator looks at the display screen attached to the numerical control device for drilling and confirms whether the tool life is excessive or insufficient when performing machining. If the tool life is insufficient, the corresponding tool is replenished. Then start drilling the workpiece as usual.

While using this function, the arithmetic processing unit 102
Data is not transmitted from the servo motor control unit 103 to the servo motor control unit 103, and consequently the servo motor control unit 103 and the servo motor 104 are not used.

[0029]

As described above, according to the present invention, it is possible to confirm whether or not the tool life required for drilling is set before actually performing the drilling. This has the effect of preventing the machine from stopping and wasting time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a numerical control device for drilling according to the present invention.

FIG. 2 is a diagram illustrating in detail a tool life storage unit, a tool-specific hole number storage unit, and a tool life determination unit in FIG.

FIG. 3 is a block diagram showing a conventional numerical control device for drilling.

[Explanation of symbols]

 101 Data Input Section 102 Arithmetic Processing Section 103 Servo Motor Control Section 104 Servo Motor 105 Hole Number Monitoring Control Section 106 Tool Life Storage Section 107 Machining Program-Specific Hole Number Storage Section 108 Tool Life Discrimination Section 109 Message Display Section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuyoshi Tonegawa 1-1, Shinrajima-cho, Kanagawa-ku, Yokohama-shi, Kanagawa 25 NEC Corporation Robotbot Engineering Co., Ltd.

Claims (3)

[Claims] 1. A XY-axis controlling servomotor is controlled by a pulse amount corresponding to a drilling position movement command in accordance with a predetermined machining program to position a table or the like, and then Z is pulsed corresponding to a drilling command. In the numerical control device for drilling, which controls the servo motor for axis control and performs drilling operation, before performing actual machining, the number of holes (or machining length) for each tool instructed by the machining program, A tool life forecasting method characterized by confirming the shortage of tool life from tool life data corresponding to multiple tools and giving advance notice of machining interruption due to tool life. 2. The tool life advance notice system according to claim 1, wherein when confirming the shortage of the tool life, the process required for the drilling operation is maintained in a stopped state. Method. 3. A XY-axis controlling servomotor is controlled by a pulse amount corresponding to a drilling position movement command according to a predetermined machining program to position a table or the like, and then Z is pulsed corresponding to the drilling command. A numerical control device for drilling that controls the axis control servo motor to perform drilling operation, including a tool life storage unit that holds tool life data corresponding to multiple tools, and individual tools that are commanded by machining programs. A tool that compares the data in the tool-specific hole number storage unit that stores the number of holes (or machining length) for each tool with the data in the tool life setting storage unit and the tool-specific hole number storage unit to determine the shortage of the tool life A numerical control device for drilling, comprising: a life determining unit.