JP2003175401A - Machine tool with bar feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machine tool with a bar feeder, capable of performing efficient machining work, even if a bar material on a certain work runs short, by machining another workpiece when machining can be performed for the workpiece. <P>SOLUTION: This machine tool is provided with machining performing means 22 in which machining schedule information MS storing the type WNO, number, machining order OR of a workpiece to be machined is stored, and according to the machining order, machining for the workpiece is performed by the machine tool. The machine tool is provided with a machinable workpiece retrieval and determination means (step S2 to step S9), whereby in the course of machining, when the bar material runs short during feeding bars and it is decided that the workpiece cannot be machined for the number designated by machining schedule information, machining for the workpiece is suspended, and the machining schedule information is retrieved to determine whether there is any machinable workpiece other than the subject workpiece or not. Concerning the workpiece determined to be machined, bar materials are supplied by the bar feeder to perform machining for the workpiece. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool equipped with a bar feeder.

[0002]

2. Description of the Related Art Conventionally, in this type of machine tool, the number of works to be machined by the machine tool and the order of machining are set as a machining schedule, and bar materials are continuously supplied by a bar feeder for continuous machining. There is.

[0003]

However, in the conventional machine tool, if the bar material for one of the workpieces to be continuously machined runs short in the bar feeder due to a setup error, etc. An alarm occurred and the machine tool stopped further machining.

In this case, even if bar materials for works other than the lacking works are present in the bar feeder,
Since no processing is performed, the alarm is left unattended during unmanned processing at night, which not only deteriorates the processing efficiency but also causes the processing schedule to be drastically changed.

In view of the above-mentioned circumstances, the present invention efficiently processes a workpiece by processing the other workpiece even if the bar material for the workpiece is insufficient. It is an object of the present invention to provide a machine tool with a bar feeder capable of performing.

[0006]

According to the invention of claim 1, in a machine tool (1) provided with a bar feeder (7) for conveying a bar material (10) to a machine tool body (2), the bar material is provided. Bar material information storing means for storing bar material information of (1
9) is provided and the type of work to be processed (work number WN
Machining schedule storing means (19) for storing machining schedule information (MS) including O, etc.), the number of pieces, and a machining order (OR), and according to the machining order indicated in the machining schedule information, the workpiece by the machine tool is processed. Processing execution means for executing processing (22, processing control program MC
(Steps S10 to S22 of P, etc.) are provided, and during processing of the work, the bar material for processing the work is insufficient in the bar feeder, and the work is processed by the number instructed by the processing schedule information. When it is determined that it is not possible, the machining of the work is interrupted, and from the machining schedule information and bar material information,
Machinable workpiece search determining means (1) for determining whether or not there is a workpiece that can be machined other than the workpiece
1. Steps S2 to S9 of the machining control program MCP, etc.) are provided, and a bar material is supplied by the bar feeder with respect to a workpiece determined to be machinable by the machinable workpiece search determination means, and the workpiece is machined. It is configured by providing a skip processing means (22, MCP) for executing.

The invention according to claim 2 is characterized in that the bar material information storing means stores the material (MT) of the bar material as the bar material information.

According to a third aspect of the present invention, the machinable work retrieval determining means determines a machinable work after a machining order (for example, the machining order OR is “2”) of the work in which the machining is interrupted. (For example, the processing order OR is “3”).

[0009]

According to the invention of claim 1, the bar material for machining the work by the machinable work search determining means (11, steps S2 to S9 of the machining control program MCP, etc.) during machining of the work. However, when it is determined that the number of workpieces is insufficient in the bar feeder and the workpiece cannot be machined by the number instructed in the machining schedule information, the machining of the workpiece is interrupted, and the machining schedule information and bar material information It is determined whether or not there is a workable work other than the work, and a bar material is supplied by the bar feeder for the work determined to be workable by the skip working means (22, MCP), Since machining of a work can be performed, even if the bar material for one work is insufficient, machining for another work will be performed. If possible, performs processing of the other workpiece, it is possible to efficiently perform processing,
Highly reliable and efficient processing is possible.

According to the second aspect of the present invention, since the bar material is stored as the bar material information, the processable work search determining means determines the search of a workable work in a form in which bar materials having different materials are distinguished. Will be possible.

According to a third aspect of the present invention, a workable work is processed after a working order (for example, the working order OR is "2") of the work whose processing is interrupted (for example, the working order OR is "2"). 3)), it is not necessary to search the processing schedule information of the portion that has already been processed, and a quick search determination can be performed.

The numbers in parentheses are for convenience of showing the corresponding elements in the drawings, and the present description is not limited to the description in the drawings.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an example of a machine tool with a bar feeder to which the present invention is applied, FIGS. 2 to 4 are flowcharts showing an example of a bar feeder machining program, and FIG. 5 is an example of a machining schedule screen. Figure, Figure 6
FIG. 3 is a diagram schematically showing an example of a processing mode according to the present invention.

As shown in FIG. 1, the machine tool 1 with a bar feeder has a machine tool main body 2, and the machine tool main body 2 is provided with a headstock 4. A spindle 3 is rotatably supported on a spindle head 4 around a spindle axis center CL which is a Z-axis, and a chuck 5 which is capable of gripping and releasing a work is mounted on the right side of the spindle 3 in the drawing. ing. A tool rest 6 is provided above the main shaft 3 in the drawing so as to be movable and driven in the Z axis and the X axis direction which is a direction orthogonal to the Z axis. The tool rest 6 is used for machining a workpiece. A tool 9 for removing is provided detachably. Various types can be adopted for the number of tool rests 6 and headstocks, their arrangement, the relative movement of the tool rest relative to the headstock, and the like.

A bar feeder 7 is provided on the left side of the machine tool body 2 in the figure, and a plurality of bar members 10 having various outer diameters and materials can be mounted on the bar feeder 7. The bar feeder 7 is provided so that the bar materials 10 can be selectively supplied to the headstock 4.

The machine tool 1 has a machine tool controller 12 such as a numerical controller, and the machine tool controller 12 has a main controller 11. The main controller 11 includes a display 15, a machining controller 16, an input unit 17, a machining schedule memory 19, a machining program memory 20, a bar feeder controller 21 for controlling the bar feeder 7, and a machine tool via the bus line 13. A machine tool controller 22 for controlling the main body 2 is connected.

Since the machine tool 1 with the bar feeder has the above-mentioned structure, when machining various works from the long bar material 10, the operator first operates the input unit 17 to start the machine tool. The type, number, and processing order of works to be processed in 1 are input and stored in the processing schedule memory 19 as a processing schedule table SCH.

That is, the processing schedule table SCH
Is displayed as a processing schedule screen on the display 15 as shown in FIG.
H has a memory area for registering and storing five pieces of material information BM of the bar material 10 (the number of storable bar materials 10 is arbitrary), and the material information BM is for processing from now on. Of the bar material 10 mounted on the bar feeder 7,
Each material MT and length ML are registered. In the embodiment, the number of bar materials 10 mounted on the bar feeder 7 is two, and the operator uses the material No. 1 as the first material. In column 1, the aluminum bar material 10 is used, the material MT is "aluminum", and the length is ML.
Is "2000" and the material No. is the second material.
In column 2, the bar material 10 of gun metal, the material MT is "gun metal",
Register as the length ML is "1000", and enter the material information BM.
And

Next, the operator selects the types of workpieces to be machined by the machine tool 1 in the order in which the workpieces should be machined.
The processing schedule information MS is stored in the corresponding memory area. The machining schedule information MS includes the machine tool 1
The machining order OR to be performed in step 1 is set in order of "1", "2", and so on. For the workpiece to be machined first, the operator first enters the work number in the row where the machining order OR is "1". "100M" as WNO, "aluminum" as material MT, "100" as the protrusion length PL indicating how much the bar material 10 is protruded from the chuck 5 in the Z-axis direction during processing, and as TC with or without top cut , “1 (present)” and “6” as the processing number MN are input and stored as the processing schedule information MS.

Next, for the second work to be machined, in the row where the machining order OR is "2", the work number WNO is "200M", the material MT is "aluminum", and the protrusion length PL is "200". “0 (None)” is input as the presence / absence TC of the top cut, and “4” is input as the processing number MN, and stored as the processing schedule information MS.

Further, for the third work to be machined, in the row where the machining order OR is "3", the work number WNO is "500M", the material MT is "gun metal", the protrusion length PL is "150", and the top. “0 (None)” is input as the presence / absence TC of the cut, and “2” is input as the processing number MN, and the pieces are stored as the processing schedule information MS.

Thus, three types of workpieces to be machined (in the present embodiment, the machining schedule information MS was created by inputting machining specifications for the three types of workpieces, but the kinds of workpieces to be machined are limited to three types. However, any number of types may be used. Here, for the purpose of simplifying the explanation, the case of machining three types of workpieces will be described), and the machining specifications are stored as the machining schedule information MS. The start of machining is commanded via 17.

Then, the main controller 11 reads out the bar feeder machining program MCP from a memory such as a system program memory (not shown), and controls the machining operation of the machine tool 1 with the bar feeder based on the bar feeder machining program MCP. To do. That is, as shown in FIG. 2, the machining control program MCP performs the initialization operation in step S1, and the machining schedule memory 1 in step S2.
The machining order OR of the machining schedule table SCH stored in 9 is searched to determine the type of work to be machined first. Processing schedule table S shown in FIG.
In the case of CH, the type of work to be machined first is the work having the machining order OR of “1” and the work number WNO of “100M”. Therefore, in step S3, the machining schedule defined in the machining schedule table SCH ends. Determine if not.

In this case, since the machining has just started, the machining schedule defined in the machining schedule table SCH has not been completed, and the process goes to step S4. In step S4, the type of the material of the work having the processing order OR “1” stored in the processing schedule information MS is determined to be “aluminum” from the material MT, and step S5
Then, it is determined whether or not the bar material 10 of the material MT is prepared in the bar feeder 7 by the processing schedule table S.
The determination is made by referring to the material information BM of CH.

The bar feeder 7 has a material number. Is "1"
Since the aluminum bar material 10 is registered as the material of No. 3, the machining program for the workpiece having the workpiece number WNO “100M” to be machined first is stored in the machining program memory 20 in step S6. in case of,
Enter step S8.

The work number WNO to be machined first is "1".
If there is no machining program for the workpiece of “00M” in the machining program memory 20, machining of the workpiece of which the work number WNO is “100M” is not executable because the machining program is not stored. After making a determination, the process returns to step S2 and the machining program memory 2
The machining schedule table SCH in 0 is searched, and the work to be machined next is searched and determined. In this case, the main control unit 11 determines in step S2 the earliest order after the order following the processing order OR attached to the work having the work number WNO determined as the work to be processed last time "100M", that is, the processing. The machining schedule information MS with the machining order OR having the order OR “2” is searched, and the work number WNO with the machining order OR “2” is “20”.
The work of "0M" is judged as the work to be processed next,
Hereafter, the same procedure is executed.

If there is a machining program for the workpiece to be machined in step S7, the process goes to steps S8 and S9 to see if the tools used in the machining program are prepared on the machine tool main body 2 side. Determine whether or not. If it is determined on the machine tool body 2 side that the number of tools used in the machining program is insufficient, it is determined that the machining program cannot be executed, and step S2 is performed.
Then, the machining schedule table SCH in the machining program memory 20 is searched again, and the work to be machined next is searched and determined. The work search procedure is the same as when there is no machining program in step S7.

When it is determined in step S9 that the tool is prepared on the machine tool body 2 side, step S10 in FIG. 3 is entered, and the machine tool body 2 side is operated via the machine tool control unit 22. Open the chuck 5, then step S
At 11, a stopper (not shown) on the machine tool body 2 side is positioned and set so as to have the protrusion length PL designated by the machining schedule information MS. Next, step S25.
Then, with respect to the bar feeder control unit 21, the material number. In response to the request for the bar feed of the bar material 10 of No. 1, the bar feeder control unit 21 receives the bar material 10 in step S12.
Supply to the headstock 4 of In addition, when there is no bar material 10 on the side of the bar feeder 7 for which bar feed is requested, or even when there is, the remaining material length is too short and the rear end portion 10a of the bar material 10 is detected. Is the bar material 10
If there is no, step S13 and step S14
From step S16, but normally step S15
Then, the bar material 10 is supplied by the bar feeder 7 to the spindle 3 of the headstock 4 with a predetermined length.

In step S16, in step S14
When it is determined that the remaining material length of the bar material 10 is not sufficient to newly machine the work, the process proceeds to step S17, the remaining material is processed, and then the number of materials is counted up in step S18. Then, the process returns to step S2, and the work to be processed next is determined by the procedure already described.

When it is determined in step S13 that the bar material 10 does not exist (the bar feeder 7 for the bar material 10).
No further machining can be performed (for example, if the setting is forgotten), the machining is finished in the machine tool 1 from step S19 to step S20.

Normally, after the bar material 10 is supplied in step S15, step S21 in FIG. 4 is entered to close the chuck 5 on the machine tool body 2 side, and then step S22.
Then, the bar material 10 is processed. The processing is performed based on the processing number MN stored in the processing schedule table SCH, and is performed until the processing number MN is reached in step S23. Further, every time one workpiece is machined, the remaining material length of the bar material 10 is updated in step S24, and the current remaining material length of the bar material 10 is calculated to appropriately calculate the machine tool control unit 22. It is stored in the memory, and it is determined whether the next work can be processed with the remaining material length.

Thus, for example, the work 34a having the work number WNO of "100M" is replaced by 6 as shown in FIG.
Individual, material No. After processing from the aluminum bar material 10 of No. 1, the processing control program MCP executes step S23.
If it is determined that the machining of the workpiece of the workpiece 34a having the workpiece number WNO of "100M" has reached the machining number MN stored in the machining schedule information MS and the machining has ended, then in step S2, The search determination regarding the workpiece to be machined is performed in the same procedure as when there is no machining program in step S7. Thus, step S2
And the work number WNO stored in the machining order OR of the machining schedule information MS is “2” and the work number WNO is “200M” 3
4b is determined to be the work to be processed next, and the work 34b having the work number WNO of "200M" is processed. For this work, four pieces of the processing number MN are designated in the processing schedule information MS, but when the second processing is performed during the processing, the remaining number is left in step S24 of FIG. There is a case where it is judged that the material length is insufficient and the work with the work number WNO cannot be processed any more.

In such a case, in step S2, the machining of the work whose work number WNO is "200M" is being interrupted, and the work to be processed next is followed by the same procedure as when there is no machining program in step S7. Is determined and the machining order OR is designated as “3” in the machining schedule table SCH, the work number WNO
The workpiece 34c with "500M" is determined as the workpiece to be processed next. At this time, in step S4, the work number W
A gun metal which is the material MT of the work piece whose NO is "500M",
Material MT of the bar material 10 stored in the bar feeder 7
To determine whether the work can be processed. In this case, the material information BM includes the material number. 2 bars 10
Since the gun metal is stored as the material MT of the above, it is determined that the work can be processed by the bar material 10 prepared in the bar feeder 7, and the work number WNO is set to "500M" by the same procedure thereafter. Process the work.

Thus, the bar material 1 on the bar feeder 7 side
As shown in FIG. 6, even if the total number of processed pieces for each type of work specified in the processing order OR specified in the processing schedule is not completed due to lack of 0, etc., the machine tool is not stopped immediately as an alarm. like,
Since it is determined whether or not machining of the work 34c for which the subsequent machining order OR is designated in the machining schedule table SCH is possible and the machining of the work is possible, the machining is executed. In the case of No. 1, it is possible to prevent a situation in which all the subsequent processing is stopped due to the shortage of the bar material 10 for a certain type of work.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a machine tool with a bar feeder to which the present invention is applied.

FIG. 2 is a flowchart showing an example of a bar feeder processing program.

FIG. 3 is a flowchart showing an example of a bar feeder processing program.

FIG. 4 is a flowchart showing an example of a bar feeder processing program.

FIG. 5 is a diagram showing an example of a processing schedule screen.

FIG. 6 is a diagram schematically showing an example of a processing mode according to the present invention.

[Explanation of symbols]

1 ... Machine tool 2 ... Machine tool main body 7 ... Bar feeder 10 ... Bar material 11 ... Machinable work search determination means (main control unit) 19 ... Bar material information storage means, processing schedule storage means (processing) Schedule memory) 22 ... Machining execution means (machine tool control unit) MS ... Machining schedule information MT ... Material OR ... Machining order MCP ... Bar feeder machining program

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masahiro Kurata             Aichi Prefecture Oguchi-machi Oguchi-machi Large-scale small-scale character boarding number 1               Yamazaki Mazak Co., Ltd. Head Office Factory (72) Inventor Morikuni Kimura             Aichi Prefecture Oguchi-machi Oguchi-machi Large-scale small-scale character boarding number 1               Yamazaki Mazak Co., Ltd. Head Office Factory F-term (reference) 3C045 FC36 HA10

Claims (3)

[Claims] 1. A machine tool provided with a bar feeder for conveying a bar material to a machine tool body, comprising bar material information storage means for storing bar material information of the bar material, and the type and number of workpieces to be machined. A machining schedule storing means for storing machining schedule information including a machining order, a machining executing means for machining the workpiece by the machine tool according to the machining order indicated in the machining schedule information, and machining the workpiece. If there is insufficient bar material in the bar feeder to process the work, and it is determined that the work cannot be processed by the number specified in the processing schedule information, the processing of the work is interrupted and From the machining schedule information and bar material information, is there a workable work other than the work concerned? A skipping process is provided in which a processable work search determination unit is provided for determining a search, and a bar material is supplied by the bar feeder for a work determined to be processable by the processable work search determination unit, and the work is processed. A machine tool with a bar feeder configured by providing means. 2. The machine tool with a bar feeder according to claim 1, wherein the bar material information storage means stores the material of the bar material as the bar material information. 3. The bar feeder according to claim 1, wherein the machinable workpiece search determining means searches for a machinable workpiece from a machining order subsequent to a machining order of the workpiece whose machining is interrupted. Machine tool with.