JP2002028801A - Two-axle lathe and its machining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accomplish efficient machining by reducing the wait time of a spindle in the case of requiring different spindles and continuously performing two kinds of machining having a large difference in both machining times for plural works such as both-sided machining. SOLUTION: In this machining method, plural works W are sequentially machined by a first spindle 1a, and the machined works W are delivered to a second spindle 1b to be subjected to the other machining. In the first spindle 1a, a first machining A is performed for the n-th work W (n is an arbitrary natural number), and a second machining is performed for the (n+1)-th work W. In the second spindle 1b, the second machining B is performed for the n-th work W, and the first machining A is performed for the (n+1)-th work W. Thus, in both spindles 1a and 1b, the first and second machining A, B are concurrently performed at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-axis lathe for sequentially processing a plurality of workpieces on a two-axis lathe, a parallel two-axis lathe, or the like, and a method of processing the same.

[0002]

2. Description of the Related Art Conventionally, when processing A and B on a front and back of a plurality of workpieces is continuously performed by a facing two-axis lathe, conventionally, a procedure shown in FIG. 5 is performed. First, the first workpiece is supplied to the first spindle, and the surface is processed A. During this time, the second
Waits for the end of machining with the first spindle. The workpiece that has been processed by the first spindle is delivered to the second spindle, and a new workpiece is supplied to the first spindle. As a result, the surface processing A of the new work is performed on the first spindle, and the back surface processing B of the previous work is performed on the second spindle in parallel with this. When both processes A and B are completed, the processed work of the second spindle is carried out by the transfer device, and the work of the first spindle is transferred to the second spindle, and a new work is transferred to the first spindle. Is supplied. Hereinafter, similarly, the surface processing A of the work is performed on the first spindle, and the back surface processing B of the work is performed on the second spindle in parallel.

[0003]

In the above processing procedure, if the required time for the front processing A and the back processing B of the work W is substantially the same, the distance between the first main spindle and the second main spindle is reduced. In addition, a long waiting time does not occur in the other spindle until machining is completed in one spindle. However, for example, when the time required for the surface processing A is considerably longer than the time required for the back processing B, the second processing must be completed before the processing on the first spindle is completed.
Will have a long waiting time. In other words, although the front and back processing of the work is shared by the first spindle and the second spindle and performed in parallel, the processing time is determined as the time of the long processing (in this case, surface processing A). Would. The same applies to the case where the time required for back surface processing B is longer than that for surface processing A. Therefore, if there is a difference of more than twice in the processing time between the front surface processing A and the back surface processing B, there is a problem that a considerable waste of the processing time is generated and the energy cost increases. For example, if the processing time of the front surface processing A is 3 minutes and the processing time of the rear surface processing B is 1 minute, 2
Therefore, the processing efficiency is poor.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the waiting time of a spindle when two types of machining which require the use of different spindles and have a large time difference between the two operations are continuously performed on a plurality of workpieces. An object of the present invention is to provide a two-axis lathe processing method that can be performed well. Another object of the present invention is to make it possible to reduce the waiting time of the spindle when performing double-sided processing. Another object of the present invention is to provide a two-axis lathe having a control function for realizing the above-mentioned machining method.

[0005]

A machining method using a two-axis lathe according to the present invention is a method of sequentially passing a plurality of workpieces, which have been machined on a first spindle, to a second spindle for another machining. The first spindle performs the first machining on the n-th (n is an arbitrary natural number) work, and performs the second machining on the (n + 1) -th work. The second spindle performs the second processing on the n-th work, and performs the first processing on the (n + 1) -th work. Thus, the same machining of the first and second machining is performed in parallel on both spindles. According to this method, the same machining of the first machining and the second machining is performed in parallel at the same time on both spindles, so that the times required for the first machining and the second machining are different. Even
There is no unnecessary waiting time between the spindles, and machining efficiency is improved.
Energy costs can also be reduced. Both spindles are the first
And the second machining are performed alternately, so that the tool rests provided for the respective spindles have the first and second machining, respectively.
It is necessary to have tools that can perform both types of processing,
For control, for example, in the case of program control, it is only necessary to alternately execute a machining program for the first machining and a machining program for the second machining on each spindle, and there is no problem due to complicated control.

In the method of the present invention, the first and second processing may be either one of the processing of the front surface and the processing of the back surface in the double-side processing of the workpiece, and the other processing. In this case, it is possible to perform the double-sided processing with a large time difference in the processing of the front and back sides without causing useless time by the two-axis lathe.

A two-axis lathe according to the present invention is a two-axis lathe having work transfer means for transferring a work from a first main spindle to a second main spindle, and which is controlled by executing a machining program by a control device. A machining program for performing the following control is provided. That is, the first spindle performs the first machining on the n-th (n is an arbitrary natural number) workpiece, the second machining on the (n + 1) -th workpiece, and the second machining on the n-th workpiece on the second spindle. And a machining program for performing the first machining on the (n + 1) -th workpiece so as to perform the same machining in the first and second machining in parallel on both spindles. For the above-described work transfer means, for example, in a facing two-axis lathe, a mechanism for moving a headstock of one of the spindles back and forth can be used. Further, the work transfer means may be a transfer device such as a loader. This 2
Also in the shaft lathe, even if the time required for the first machining and the time required for the second machining are different, it is possible to avoid a wasteful waiting time between the spindles.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a second embodiment according to the present invention.
It is a key map showing composition of a shaft lathe. This two-axis lathe is an opposed two-axis lathe in which a first main shaft 1a and a second main shaft 1b are arranged to face left and right with their axes aligned. These first,
A first tool rest 2a and a second tool rest 2b are arranged corresponding to the second spindles 1a and 1b, respectively. The first spindle 1a has a chuck 3a for gripping the work W, and is supported by a fixed headstock 4a. The second spindle 1b has a chuck 3b for gripping the work W, and is supported by a movable headstock 4b. The second spindle 1b is driven forward and backward in the axial direction (Z-axis direction) of the spindle 1b by the work transfer means 5. The work transfer means 5 includes a rail 6 on which the headstock 4b is freely movable in the axial direction, a feed screw 7 for moving the headstock 4b in the axial direction, and a servomotor 8 for driving the feed screw 7 to rotate. Become. The rail 6 is installed on a bed (not shown).

The feed stand 9a of the first tool rest 2a is set on the side of the first spindle 1a. The feed stand 9a has an index housing 10a, and is installed on a bed rail 11a so as to be movable in a direction (X-axis direction) orthogonal to the axial direction (Z-axis direction) of the main shaft 1a. The index housing 10a is mounted on the rail 12a of the feed bar 9a so as to be movable in the Z-axis direction. The tool rest 2a is rotatably mounted on the index housing 10a via a turret shaft 13a. ing. The feed base 9a and the index housing 10a are connected to servo motors 16a, 16a via feed screws 14a, 15a, respectively.
It is sent in the X and Z axis directions by 17a. The tool post 2a is of a turret type, and has a polygonal drum shape in front, and various tools 18a are mounted on a tool station composed of respective peripheral portions.

The second tool rest 2b arranged corresponding to the second spindle 1b has the same configuration as the first tool rest 2a, and its feed stand 9b is located on the side of the second spindle 1b. Will be installed. That is, the feed base 9b is the index housing 1
0b, and is mounted on the bed rail 11b so as to be movable in a direction (X-axis direction) orthogonal to the axial direction (Z-axis direction) of the main shaft 1b. The index housing 10b is mounted on the feed base 9b so as to be movable in the Z-axis direction.
The tool post 2 is mounted on the index housing 10b via a turret shaft 13b.
b is installed so that index rotation is possible. The feed base 9b and the index housing 10b are each provided with a feed screw 14
These are sent in the X and Z axis directions by servo motors 16b and 17b via b and 15b. Various tools 18b are mounted on each tool station of the tool rest 2b. The second tool rest 2b may not have the function of moving in the Z-axis direction, and in this case, the Z-axis of the tool with respect to the workpiece W is set by moving the second headstock 4b in the Z-axis direction. The movement in the direction is performed.

The transfer device 19 includes first and second spindles 1a,
This is a device for loading and unloading the work W with respect to 1b. The transfer device 19 supplies, for example, an unprocessed work W to the first spindle 1a and discharges the processed work W from the second spindle 1b. The transport device 19 is, for example, installed on a erected rail 20 and is movable in the X-axis direction. Note that the transfer device 19 may be used as a work transfer means.

The control system of the two-axis lathe includes a first control device 21 and a second control device 22.
And a transfer control device 23. These control devices 21
Numerals 23 are computer-type devices for performing program control of a numerical control device or the like, and include a numerical control unit and a programmable controller unit for performing sequence control.
Even if these first to third control devices 21 to 23 are provided in independent computers or the like,
It may be provided in one computer or the like. The first control device 21 is a device that controls the operation of the first spindle 1a and the corresponding first tool rest 2a, and is controlled according to a program described later. The second control device 22 is a device that controls the operation of the second spindle 1b and the corresponding second tool rest 2b. In this case, the control is performed according to the program written in the program memory 24. Will be The transfer control device 23 is a device that controls the operations of the transfer device 19 and the work transfer means 5, and is controlled according to a transfer program 27 written in a program memory 24. When the second tool rest 2b is fixed in the Z-axis direction and the second tool rest 4b is moved forward and backward for machining, the motor 8 for moving the second tool rest 4b forward and backward is used. Is controlled by the control device 22.

As a program written in the program memory 24, a machining program 25 for the first machining A,
A processing program 26 for the second processing B and a transport program 27 are included. Here, the first processing A is processing of the front surface in the double-side processing of the work W, and the second processing B is processing of the back surface. The machining program 25 of the first machining A is executed by the first spindle 1a or the second spindle 1b.
This is a program used when performing machining A, and mainly describes commands for controlling the spindles 1a and 1b and the tool rests 2a and 2b. Processing program 26 for second processing B
Is a program used when performing the second machining B using the first spindle 1a or the second spindle 1b.
a, 1b and commands for controlling the tool rests 2a, 2b are mainly described. The machining program 25 for the first machining A and the machining program 26 for the second machining B are two programs, one executed by the first controller 21 and the other executed by the second controller 22. May be provided, and the same machining programs 25 and 26 may be commonly executed by the first and second control devices 21 and 22. The transfer program 27 is a program for controlling the transfer device 19, and a program for controlling the work transfer means 5 is added to the transfer program 27.

Next, a working method will be described. FIG. 2 shows a plurality of works W shared by the first and second spindles 1a and 1b.
6 is a flowchart showing the operation of a two-axis lathe in the case where the double-sided processing is continuously performed. FIG. 3A shows the movement of the first spindle 1a.
FIG. 2B shows the movement of the second main shaft 1b. FIG. 3 is an explanatory diagram of the operation. With reference to FIGS. 2 and 3, the operation of the double-sided processing will be described below.

First, the work W is supplied to the first spindle 1a by the transfer device 19, and the work W is gripped by the chuck 3a (step S1). Then, as shown in FIG. The first processing A, that is, the surface processing of the work W is performed by the tool 18a of the tool rest 2a (step S2). The control is performed by the first control device 21 using the machining program 25 of the first machining A. When the machining is completed, the first spindle 1a is moved by the workpiece transfer means 5 on the second spindle 1b side as shown in FIG.
The workpiece W after the first machining A is delivered to the second spindle 1b from (step S3, R5).

The next unprocessed work W is supplied to the first spindle 1a having delivered the work W by the transfer device 19, and the work W is gripped by the chuck 3a (step S4). Next, the workpiece W supplied to the first spindle 1a is subjected to the second processing B, that is, the back processing (step S5). In parallel with this, as shown in FIG. 3C, the second machining B is also applied to the workpiece W on the second spindle 1b side.
Is performed (step R6). The control is performed by the first control device 21 and the second control device 22 using the machining program 26 of the second machining B. When the processing is completed, the work W having been subjected to the double-side processing is discharged from the second spindle 1b by the transfer device 19 (step R7).
Next, as shown in FIG. 3D, the work W after the second machining B is transferred from the first main shaft 1a to the second main shaft 1b by the work transfer means 5 on the second main shaft 1b side. (Steps S6, R8, R1). Work W
The next unprocessed work W is supplied to the first spindle 1a that has received the received work (step S1).

Next, the first machining A is performed on the unprocessed work W on the side of the first spindle 1a (step S2), and in parallel with this, the second spindle as shown in FIG. The first processing A is performed on the work W on the 1b side (step R2). The control is performed by the first control device 21 and the second control device 22 using the machining program 25 of the first machining A. When the processing is finished, the work W
Is discharged from the second spindle 1b by the transfer device 19 (step R3). Next, the first machining A is transferred from the first spindle 1a to the second spindle 1b by the work transfer means 5.
Delivery of the work W that has been completed is performed (step S3,
R4, R5).

In the same manner, on the first spindle 1a side, the unprocessed work W (n-th work)
In the processing A, the second processing B is performed on the next unprocessed work W (the (n + 1) th work). Second spindle 1b
On the side, the second processing B is performed on the n-th work W on which the first processing A has been completed, and the first processing A is performed on the next (n + 1) -th work W (n is an arbitrary natural number). ). Thereby, as shown in FIG. 4, when the first machining A is performed on the first spindle 1a side, the first machining A is also performed on the second spindle 1b side.
Is performed and the second processing B is performed on the first spindle 1a side, the second processing B is also performed on the second spindle 1b side.
Is performed. In FIG. 4, W _n is the n-th work W
And W _{n + 1} indicates the (n + 1) th work W, respectively.

Here, as shown in FIG.
Is 3 minutes and the time required for the second machining B is 1 minute. However, the same machining is always performed in parallel between the first spindle 1a and the second spindle 1b as described above. So that one spindle does not become a waiting time,
Unnecessary machining time as in the conventional example can be eliminated, and the energy cost can be significantly reduced.

In this embodiment, each spindle 1a, 1
b, the first processing A and the second processing B are alternately repeated, respectively.
The machining program 25 and the machining program 26 for the second machining B are selected and used for machining on each of the spindles 1a and 1b. Therefore, two machining programs for machining on the two spindles 1a and 1b are selected. Is sufficient, and the configuration is simplified. Two spindles 1
When different machining programs are used for a and 1b,
The same machining program may be copied for each machining A and B, or the copied content may be copied to each of the spindles 1a and 1a.
Modifications may be made in accordance with the configuration on the 1b side, and no effort is required to create a machining program.

[0021]

The processing method using the two-axis lathe according to the present invention is as follows.
A method in which a plurality of workpieces sequentially processed by a first main spindle are transferred to a second main spindle to perform another processing. In the first main spindle, an n-th (n is an arbitrary natural number) work is assigned to a first workpiece. 1 is performed, the second processing is performed on the (n + 1) th work, the second processing is performed on the nth work on the second spindle, and the first processing is performed on the (n + 1) th work. In the main spindle, the same processing of the first and second processing is performed in parallel. Therefore, it is necessary to use different main spindles, and two types of processing having a large time difference between the two processing are performed on a plurality of workpieces. When the operation is performed continuously, the waiting time of the spindle can be reduced and the operation can be performed efficiently. In the case where the first and second processes are either one of the front surface processing and the rear surface processing in the double-sided processing of the work, the double-sided lathe processing of the double-sided processing of the work causes wasteful time. Can be done without letting it go.

A two-axis lathe according to the present invention has a work transfer means for transferring a work from a first main spindle to a second main spindle, and is controlled by a control device by a machining program.
In the first spindle, the first machining is performed on the n-th (n is an arbitrary natural number) workpiece, the second machining is performed on the (n + 1) th workpiece, and the second machining is performed on the n-th workpiece in the second spindle. And a machining program that controls to perform the same machining of the first and second machining in parallel on both spindles by performing the first machining on the (n + 1) th work. Therefore, when two types of machining that require the use of different spindles and have a large time difference between the two operations are performed continuously for a plurality of workpieces, the waiting time of the spindle can be reduced and the machining can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a configuration of a two-axis lathe according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing operation by the two-axis lathe.

FIG. 3 is an explanatory view showing a processing operation by the two-axis lathe.

FIG. 4 is an explanatory diagram showing a cycle of a machining operation by the two-axis lathe.

FIG. 5 is an explanatory view showing a cycle of a processing operation according to a conventional example.

[Explanation of symbols]

 1a: First spindle 1b: Second spindle 5: Work transfer means 25: First machining program 26: Second machining program A: First machining B: Second machining W: Work

Claims (3)

[Claims] 1. A method in which a plurality of workpieces sequentially processed by a first main spindle are transferred to a second main spindle to perform another processing, wherein n (n is an arbitrary natural number) is used in the first main spindle. The first processing is performed on the n-th work, the second processing is performed on the (n + 1) -th work, the second processing is performed on the n-th work on the second spindle, and the first processing is performed on the (n + 1) -th work. A processing method using a two-axis lathe in which the same processing of the first and second processing is performed in parallel on both spindles. 2. The processing according to claim 1, wherein the first processing and the second processing are either one of the front surface processing and the back surface processing in the double-sided processing of the workpiece.
A processing method using the two-axis lathe described in the above. 3. A two-axis lathe having a work transfer means for transferring a work from a first main spindle to a second main spindle, wherein the lathe is controlled by executing a machining program by a control device. (N is an arbitrary natural number) the first machining is performed on the n-th workpiece, the second machining is performed on the (n + 1) -th workpiece, the second machining is performed on the n-th workpiece on the second spindle, and the (n + 1) -th machining is performed. A two-axis lathe provided with a machining program for performing a first machining on a workpiece so as to perform the same machining in the first and second machining in parallel on both spindles.