JP2002205242A - Machining system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machining system capable of preventing occurrence of a machining failure even in work machined after shifting a tool on the way. SOLUTION: This machining system comprises a machine tool 1, a machined work measuring means 2 outside the machine tool, and a work conveying means 3. A plurality of same tools 21 are mounted to a tool holding means 17, and a machining control means 7 is provided with a tool shifting means 32 that, when one tool 21 failures, shifts to the other tool 21 for machining. A control means 43 for tool shift time is provided for performing machining for measurement with a required machining allowance remained and performing the remaining machining after measuring by the machined work measuring means 2 in shifting the tool. The remaining machining is performed after correcting the movement of a tool support body 17 in response to a measuring result.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining system including a machine tool such as a lathe, a work transfer means, and a work work measuring means outside the machine.

[0002]

2. Description of the Related Art Conventionally, in a turret lathe or the like, the same tool is attached to a plurality of tool stations of a turret for frequently used tools and the like, and one of the same tools is installed.
In some cases, when the tool wears or breaks while using the book, the tool is shifted to another new tool in the same tool. This function is called the tool shift function, etc., even if the tool wears, the operation can be continued by shifting to a new tool without stopping the operation for tool replacement, and it can be operated in automatic operation or unmanned operation Factories can be planned.

[0003]

After the tool shift,
If the processing is performed as it is, there is a high possibility that the workpiece processed by the tool will be defective. Basically, after a tool shift, a workpiece is machined and then measured by an external measuring device or the like, and the measured data is fed back to the machining control means. This prevents the next workpiece from being processed poorly. However, it is not possible to prevent a machining failure of a workpiece which has been machined by a tool shift on the way, and the defective workpiece is wasted, thereby lowering productivity.

An object of the present invention is to provide a processing system capable of preventing the occurrence of processing defects even in a workpiece which has been processed by a tool shift on the way. Another object of the present invention is to provide a two-axis lathe with the first and second workpieces on the same workpiece.
It is an object to prevent the occurrence of processing defects due to the tool shift during the first processing when the processing is sequentially performed. Still another object of the present invention is to provide a two-axis lathe in which, when performing the first and second machining operations on the same workpiece sequentially, even if a tool shift occurs in any of the first and second machining operations, a machining defect occurs. To be able to respond immediately so that it does not occur.

[0005]

The present invention will be described with reference to FIG. 1 corresponding to an embodiment. This processing system processes a work supported by a work support (16) with a tool (21) supported by a tool support (17) that can move forward and backward relative to the work support (16). A machine tool (1) having a machining section (5) to be machined, and machining control means (7) for controlling the machining section (5), and a dimension of a machined workpiece provided outside the machine tool (1). Workpiece measuring means (2) for measuring, a work support (16) of the machine tool (1), and the workpiece measuring means (2)
And a work transfer means (3) for transferring a work between the work support means (16), the work support (16) supports mutually compatible first and second tools (21), (7) is a function (3) of switching to processing by the first tool (21) and performing processing by the second tool (21).
In the machining system having the feature (2), a tool shift control means (43) for performing the following control is provided. The tool shift control means (43) is provided with the second tool (2).
When the processing is switched to the processing according to 1), as the processing by the processing section (5), the work supported by the work support (16) is subjected to measurement processing while leaving a necessary processing allowance. The processed workpiece is transported to the processed workpiece measuring means (2) by the workpiece transport means (3), and the transported workpiece is processed workpiece measuring means (2).
And the measured work is returned to the work support (16) by the work transfer means (3). Based on the measurement result by the processed work measurement means (2), the work control means (5) A series of controls for correcting the amount of movement of the tool support (17) and performing the remaining machining is performed.

According to this configuration, the tool (21) can be used during machining.
For example, when breakage or wear of is detected, the processing control means (7) switches to processing by the first tool (21),
Processing by the second tool (21) is performed. When the tool (21) is switched, that is, when there is a tool shift, the tool shift control means (43) performs the following series of controls. That is, as the processing by the processing section (5), the work supported by the work support (16) is subjected to measurement processing while leaving a necessary processing allowance. The processed work for measurement is transferred to the processed work measuring means (2) by the work transfer means (3), and the transferred work is measured by the processed work measuring means (2). The measured work is transferred to the work transfer means (3) by the work support (1).
Return to 6). On the basis of the measurement result by the machining work measuring means (2), the machining control means (7) corrects the amount of movement of the tool support (17) to perform the remaining machining. In this way, if there is a tool shift, normal machining is not continued, but a machining process that leaves a necessary machining margin, that is, a so-called dummy cutting is performed, and the machined work is measured outside the machine by a machined work measuring means (2). , And the remaining amount is corrected according to the measurement result to perform the remaining processing. Therefore, it is possible to prevent the occurrence of processing defects even in a workpiece that has been processed by tool shift on the way. Since it is an out-of-machine measurement, accurate measurement can be performed, and various measurements can be supported.

In the present invention, the following configuration may be adopted when the machine tool (1) is a two-axis lathe. That is, the machine tool (1) includes, as the processing units, a first processing unit (4) that performs a first processing, and a second processing unit (5) that processes a workpiece after the first processing. And the work transfer means (3) is provided between the tool supports (16) and (16) of the first and second working parts (4) and (5) and the work work measuring means (2). Between the first and second working parts (4), (5), and both the tool supports (16), (16) in the first and second working parts (4), (5), respectively. Second tool (21)
And first processing control means (6) for controlling the first processing section (4) and second processing control for controlling the second processing section (5) as the processing control means. Means (7)
The first and second machining control means (6) and (7) both switch to machining with the first tool (21) and perform machining with the second tool (21). Function (32). The tool shift control means (43) is configured to control the second machining section (5)
The above-described series of controls is performed at the time of switching to machining by the tool (21). In the first processing section (4),
A first processing section shift control means (42) is provided for controlling when the processing is switched to the processing by the second tool (21). The first processing section shift control means (42) completes the processing up to the processing by the second processing section (5) even after switching to the processing by the second tool (21), and completes the work of the second processing. Is transported by the workpiece transport means (3) and is measured by the processed workpiece measuring means (2). Until the measured data of the workpiece is fed back to the processing control means (6) of the first processing section (4), Processing of the next work shall not be performed. In the case of this configuration, in the first processing, which is a pre-process, during the tool shift, the processing of the next work is waited until the measurement data of the completed work is fed back, so that the useless defective work can be prevented from being generated.

In the present invention, when the machine tool (1) is a two-axis lathe, the following may be performed instead of waiting for the machining. That is, the machine tool (1) is a two-axis lathe, and includes, as the processing units, a first processing unit (4) that performs a first processing and a second processing unit that processes a workpiece after the first processing. The work transfer means (3) includes a tool support (3) of the first and second working parts (4) and (5) and the work work measuring means (2). And the tool supports (16) and (16) in the first and second processing sections (4) and (5) are compatible with each other. Supporting first and second tools (21);
As the processing control means, a first processing control means (6) for controlling the first processing part (4) and a second processing control means (7) for controlling the second processing part (5) And
These first and second processing control means (6), (7)
Switch to machining with the first tool (21),
Function (32) for performing machining with the second tool (21)
Shall be provided. In this case, the tool shift control means (43) controls the first processing section (4) when switching to the processing by the second tool (21) and the second processing section (5). The above-described series of controls are performed both at the time of switching to machining by the tool (21). In the case of this configuration, when the first and second machining are sequentially performed on the same work in the two-axis lathe, the first and second machining are performed.
Even if a tool shift occurs in any of the above processes, it is possible to immediately cope with the occurrence of a processing defect.

[0009]

An embodiment of the present invention will be described with reference to the drawings. The overall outline will be described with reference to FIG. This machining system includes a machine tool 1, a machined work measuring means 2 provided outside the machine tool 1, and a work transfer means 3
And The machine tool 1 is composed of a two-axis lathe and includes first and second processing units 4 and 5 and first and second processing control units 6 and 7 for controlling the processing units 4 and 5, respectively. The processed workpiece measuring means 2 is configured to process the processed workpiece W
A measurement unit 9 for measuring the size of the measurement unit 8 by a sensor 8 such as a touch sensor, and a measurement control unit 10 for controlling the operation of the measurement unit 9 and processing the measurement data. The work transfer means 3 includes a machine tool 1, a processed work measurement means 2,
This is a means for transporting the work W between the material work supply means 11 and the processed work unloading means 12. The work transfer unit 3 includes a loader unit 13 that is a mechanism part, and a transfer control unit 14 that controls the loader unit 13. The control units 6, 7, 10, and 14 are configured to perform a cooperative operation by mutually transmitting signals. These control means 6,
A general control unit 15 may be provided as a higher-level control unit that controls the whole of the units 7, 10, and 14.

FIG. 2 shows a specific example of the machine tool 1 and the work transfer means 3. The machine tool 1 is a parallel two-axis lathe. The first and second processing units 4 and 5 each include a work support 16 formed of a spindle chuck and a work support 1.
6 and a tool support 17 which can move relatively to and from the tool support 17. The tool support 17 includes a turret type tool rest, and is installed on a bed 18 via a turret base 19 and a turret carriage 20. The turret base 19 is movable in the left-right direction (X-axis direction), the turret carriage 20 is movable in the front-rear direction (Z-axis direction), and the tool support 17 indexes the turret carriage 20 around the turret center. It is installed so that it can rotate.
The turret base 19 and the turret carriage 20
It is driven forward and backward by a servo motor and a feed screw mechanism (not shown) of each axis. Tools 21 are mounted on a plurality of tool stations, each of which comprises a peripheral portion of the tool support 17. In each of the tool supports 17, some of the plurality of tools 21 to be attached are mutually compatible tools, for example, the same tool. The machine tool 1 has a reversing device 22 installed above the work support 17.
The reversing device 22 includes two reversing device chucks 22 a and 22.
b, the work held by one of the reversing device chucks 22a is replaced with the other reversing device chuck 22b, thereby reversing the work.

The loader section 13 of the work transfer means 3 is of a gantry type. A lift rod 26 is provided on a traveling platform 24 traveling along an erection rail 23 via a front-rear movable platform 25 so as to be movable up and down. A loader head 27 is provided at the lower end of 26. As shown in FIG.
7, two loader chucks 28 are provided on the workpiece support 1.
6 are provided in a forward-facing posture and a downward-facing posture, and the positions of both loader chucks 28 are interchangeable. The travel of the traveling platform 24, the longitudinal movement of the longitudinal platform 25, and the elevation of the elevating rod 26 are performed by driving the servo motors of the respective axes.

In FIG. 1, each control means 6, 7, 10,
14 will be described. Each of the first and second machining control means 6 and 7 is a computer-based numerical control device, and executes the machining program 33 in the arithmetic and control unit 30 so that the first and second machining control means in the machine tool 1 are respectively provided. Are controlled. Each arithmetic control unit 30 has a function of controlling the movement of the tool support 17 in accordance with a command of the machining program 33, and based on the measurement value fed back from the measurement control unit 10, It has a correcting means 31 for correcting the moving amount.

The first and second machining control means 6, 7 are:
The tool shift means 32 includes a tool shift means 32 which is used when the first tool 21 is used among the plurality of compatible tools 21 provided on the tool support 17. When the tool 21 is damaged or the like, control is performed to switch to processing by the second tool 21 among the compatible tools 21. Specifically, the tool shift means 32 reads a tool command specifying a predetermined tool station in the machining program 33 into a tool command specifying a tool station to which a compatible tool is attached. The tool shift means 32 sets a predetermined flag when the tool is switched, that is, when the tool is shifted.

The transport control means 14 is a computer-type numerical controller, and controls the loader unit 13 by executing a transport program 34 by an arithmetic control unit 35. The measurement control unit 10 includes a measurement operation control unit 36 that causes the measurement unit 9 to perform a predetermined measurement operation, and a measurement data processing unit 37 that processes results measured by the measurement unit 9. The measurement data processing unit 37 has a function of feeding back a measurement result to the correction unit 31 of the first or second arithmetic control unit 30 according to the measurement work W.

Under the control of the processing control means 6, 7 and the transfer control means 14, the operation when the normal processing program 33 and the normal transfer program 34 are executed is as follows.
For example, the following operation is performed. Work material is supplied from the work supply means 11 by the work transfer means 3. -Chuck unloading of the work support 16 of the first processing unit 4.・ Loading of the chuck. -Transfer the first processed product to the chuck 22a of the reversing device 22. Receiving the inverted product from another chuck 22b of the reversing device 22; -Chuck unloading of the work support 16 of the second processing unit 5.・ Loading of the chuck.・ The finished product of the second processing is unloaded and loaded into the processed workpiece measuring means 2.

In this embodiment, in a machining system having such control means 6, 7, 10, and 14, a tool shift control means 43 for performing the following series of controls is provided. The tool shift control unit 43 is a unit that controls when the second processing unit 5 performs processing. The above series of controls are the following controls. That is, when the processing is switched to the processing by the second tool 21 in the second processing section 5, the measurement is performed by the processing section 5 while leaving the necessary processing allowance on the work W supported by the work support 16. Work, so-called dummy cutting. The processed work W for measurement is transferred to the processed work measuring means 2 by the work transfer means 3, and the transferred work W is measured by the processed work measuring means 2. The measured work W is returned to the work support 16 by the work transfer means 3. Further, based on the measurement result by the processing workpiece measuring means 2, the processing control means 7 corrects the amount of movement of the tool support 17 and causes the remaining processing to be performed.

The tool shift control means 43 includes, specifically, a processing program 38 for measurement provided in the second processing control means 7 and a work state storage means 40, and a tool provided in the transport control means 14. Shift transport program 3
9 and the work state storage means 41, and the respective arithmetic control units 30 provided in the processing control means 7 and the transport control means 14,
35, a measurement operation control unit 36 for performing predetermined measurement operations and processing of measurement results in the measurement control unit 10, and a measurement data processing unit 37.

The machining program 38 for measurement leaves a necessary machining allowance on the workpiece W supported by the workpiece support 16 as machining by the machining section 5 when the machining is switched to machining with the second tool 21. This is a means for performing predetermined measurement processing. The specific contents of the processing for measurement are set to appropriate contents according to the shape of the work W before processing, the completed shape of the work W, the tool to be used, and the like. The work state storage means 40 stores information indicating the stage of the work W supported by the work support 16. For example, no work, material, first processed product, second processed material, second
Information indicating the distinction between a processed product, a tool shift product, and the like, and is indicated by a predetermined code (for example, a one-digit number).

The tool shift transfer program 39 causes the work transfer means 3 to transfer the work W for measurement of the work support 16 in the second processing unit 5 to the processed work measurement means 2, and the measured work W is returned to the work support 16. The work state storage means 41 in the transfer control means 14 is a means for storing the respective work states of the two chucks 28 in the loader unit 13 in the same manner as the work state storage means 40 in the processing control means 7. Although not shown, the measurement control unit 10 is provided with a work state storage unit similar to the work state storage unit 40 described above. Each work state storage means 40, 41,...
Has a function of transferring the stored contents of the work state to each other when the work is delivered.

The first machining control means 6 has a first machining section shift time control means 42 separately from the tool shift time control means 43. Similarly to the second machining control means 7, the first machining It has state storage means 40. The first processing section shift control means 42 is a means for controlling the first processing section 4 when the processing is switched to the processing by the second tool 21. The first processing section shift control means 42 completes the processing up to the processing by the second processing section 5 even after switching to the processing by the second tool 21, and the work W in which the second processing is completed
Is transported by the workpiece transport means 3 and is measured by the processed workpiece measuring means 2, and the next workpiece W is processed until the measured data of the workpiece is fed back to the processing control means 6 of the first processing section 4. Control so that there is not. The control not to process the next work W is a control to prevent a new work W from being carried into the first processing unit 4.

Next, the operation at the time of tool shift by the above configuration will be described with reference to the flowchart of FIG. FIG. 4 shows an operation when a tool shift is performed in the second processing unit 5. If there is a tool shift in the second processing unit 5 (S
1) The measurement processing is performed in the processing section 5 (S2). The presence or absence of the tool shift can be recognized by the flag in the tool shift means 32, and the arithmetic control unit 30 recognizes the flag and executes the measurement processing program 38 to perform the above-described processing for measurement. The workpiece W for which the processing for measurement has been completed is transported to the processed workpiece measuring means 2 by the workpiece transporting means 3 (S3).

The processed workpiece measuring means 2 confirms that the transported workpiece W is a workpiece to be measured by the second processing control means 7 or the workpiece state storage means 40 of the transport control means 14.
The data is received as stored data 41 and the like, and a measurement cycle of the processed product for measurement is performed (S4). The measurement data is fed back to the correction unit 31 in the arithmetic and control unit 30 of the second processing unit 7. When the measurement of the processed workpiece for measurement is completed, the workpiece W for measurement is returned to the original work support 16 in the processing unit 5 again by the work transfer means 3 (S
5) In the processing section 5, the remaining processing is performed (S)
6). The remaining processing is, for example, a finishing processing to be a finished product of the second processing. In the remaining machining, the amount of movement of the tool support 17 is corrected according to the feedback data from the machining work measuring means 22.

As described above, when there is a tool shift, the normal machining is not continued, and the machining machining which leaves a necessary machining margin is performed.
The so-called dummy cutting is performed, the processed work W is measured by the processed work measuring means 2 outside the machine, and the amount of movement is corrected according to the measurement result to perform the remaining processing. Also in the work W which has been performed, occurrence of processing defects can be prevented. Since it is an out-of-machine measurement, accurate measurement can be performed, and various measurements can be supported.

When the tool shift is performed in the first processing unit 4, the second processing unit 2 is controlled by the first processing unit shift control means 42 without performing the above-described processing for measurement. To complete the second processing. In this case, the finished workpiece W is transported by the workpiece transporting means 3 by the workpiece transporting means 3 and measured by the workpiece transporting means 3 as in the case where there is no tool shift. Until the feedback to the correcting means 31, the next work W is not carried into the first processing unit 4 and the processing of the next work W is not performed. As described above, the first processing unit 4 that performs the pre-processing waits for the processing of the next workpiece W until the measurement data of the completed workpiece is fed back at the time of the tool shift. it can.

In the above embodiment, the first processing unit 4
During the tool shift, the machining for measurement is not performed. However, the tool shift control means 43 also performs the tool shift in the first machining unit 4 in the same manner as the tool shift in the second machining unit 4. Then, the series of controls for the measurement processing shown in FIG. 4 may be performed. In such a case, when the first and second machining are sequentially performed on the same workpiece W in the two-axis lathe, even if a tool shift occurs in any of the first and second machining, an immediate machining is performed so that a machining defect does not occur. Can be handled.

[0026]

According to the processing system of the present invention, when there is a tool shift, normal processing is not continued, but a processing for measurement, that is, a so-called dummy cutting, which leaves a necessary processing allowance, is performed. Since the remaining work is performed by measuring the movement of the workpiece by the work measurement means and correcting the movement amount in accordance with the measurement result, it is possible to prevent the occurrence of processing defects even in a workpiece that has been machine-shifted halfway. . In the present invention, when the machine tool is a two-axis lathe, in the first machining which is the preceding process, at the time of tool shift, the machining of the next workpiece is waited until the measurement data of the completed workpiece is fed back. When the first processing unit shift control means for controlling is provided, it is possible to prevent the occurrence of useless defective work due to the tool shift during the first processing. In the present invention, when the machine tool is a two-axis lathe, the tool shift control means controls the switching to the processing by the second tool in the first processing section and the second tool in the second processing section. In the case of performing the above-described series of controls both at the time of switching to the machining by the first and second machinings, the first and second machinings are sequentially performed on the same workpiece on a two-axis lathe. In any of the cases, a tool shift can be dealt with immediately so that a processing defect does not occur.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a conceptual configuration of a processing system according to an embodiment of the present invention.

FIG. 2 is a perspective view of a specific example of the machine tool and the work transfer means.

FIG. 3 is a cutaway side view of the work transfer means.

FIG. 4 is an explanatory diagram of a processing cycle for measurement at the time of a tool shift.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Machine tool 2 ... Workpiece measuring means 3 ... Work transfer means 4 ... 1st processing part 5 ... Second processing part 6, 7 ... Processing control means 13 ... Loader part 14 ... Transfer control means 16 ... Work support DESCRIPTION OF SYMBOLS 17 ... Tool support 21 ... Tool 22 ... Reversing device 28 ... Loader chuck 30 ... Calculation control unit 31 ... Correction means 32 ... Tool shift means 33 ... Normal machining program 38 ... Measuring machining program 39 ... Tool shifting conveyance program 42: control means at the time of shifting the first processing portion 43: control means at the time of tool shift W: work

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G05B 19/404 G05B 19/404 F

Claims (3)

[Claims] 1. A processing unit for processing a work supported by a work support with a tool supported by a tool support that can move relatively to and from the work support, and a processing for controlling the processing unit. A machine tool having control means, a machined work measuring means provided outside the machine tool and measuring a size of a machined work, and a work piece between the work support of the machine tool and the machined work measuring means. A work transfer means for transferring the work, the work support supports first and second tools compatible with each other, and the processing control means switches the processing to processing by the first tool, and switches the processing to the second tool. In a machining system having a function of performing machining by a tool, control means at the time of tool shift is provided, and the control means at the time of tool shift is provided when the machining is switched to machining by the second tool. As processing, the work supported by the work support is subjected to measurement processing leaving a necessary processing allowance, and the processed work for measurement is transferred to the processed work measurement means by the work transfer means, The transferred work is measured by the processed work measuring means, the measured work is returned to the work support by the work transfer means, and based on the measurement result by the processed work measuring means, the processing control means controls the tool support. A processing system that performs a series of controls of correcting the amount of movement of the workpiece and performing the remaining processing. 2. The machine tool according to claim 1, wherein the machine tool is a two-axis lathe, wherein the machining unit includes a first machining unit that performs a first machining;
A second processing unit configured to process the completed workpiece, wherein the work transfer unit is configured to transfer the work between the tool support of the first and second processing units and the processed work measurement unit. It is possible that both of the tool supports in the first and second working parts support first and second tools, respectively, which are mutually compatible, and that the first working First machining control means for controlling the first machining section and second machining control means for controlling the second machining section, and both the first and second machining control means are provided with a first tool. The tool shift control means has a function of switching to the machining by the second tool in the second machining section when switching to the machining by the second tool in the second machining section. In the first processing section, A first processing section shift control means for performing control when the processing is switched to the processing by the second tool is provided, and the first processing section shift control means keeps the second processing section shifted even after the switching to the processing by the second tool. The work completed by the second processing unit is completed, and the workpiece on which the second processing has been completed is transported by the work transport unit and measured by the processed work measuring unit. The measurement data of the workpiece is processed by the processing control unit of the first processing unit. 2. The processing system according to claim 1, wherein the processing of the next workpiece is not performed until the feedback is made. 3. The machine tool is a two-axis lathe, wherein a first processing unit that performs a first processing is provided as the processing unit.
A second processing unit configured to process the completed workpiece, wherein the work transfer unit is configured to transfer the work between the tool support of the first and second processing units and the processed work measurement unit. It is possible that both of the tool supports in the first and second working parts support first and second tools, respectively, which are mutually compatible, and that the first working First machining control means for controlling the first machining section and second machining control means for controlling the second machining section, and both the first and second machining control means are provided with a first tool. The tool shift control means has a function of switching to the processing by the second tool in the first processing unit and switching the processing to the processing by the second tool in the first processing unit. Both when switching to machining with the second tool in the part The processing system according to claim 1, wherein the series of controls is performed for (a).