JP2000107982A - Working method and working device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the working time of a work. SOLUTION: The grinding wheels 74 and 76 on two wheel spindle stocks 54 and 62 work their charging working positions. When they finish the working in charge, it is decided whether the other side grinding wheel is being corrected (abraded or exchanged) or not, and when the other side grinding wheel is being corrected, the grinding wheel not being corrected works the working position charged by the grinding wheel in the correction. As a result, two wheel spindle stocks are operated efficiently, so as to reduce the processing time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining method and a machining apparatus, and more particularly, to a machining method and a machining apparatus for machining a plurality of machining locations on a workpiece with a plurality of tools.

[0002]

2. Description of the Related Art Conventionally, a work table for rotating a workpiece is fixed, and two grindstone tables each having a grindstone are independently movable in the X direction and the Y direction. There has been proposed an apparatus capable of executing an independent grinding cycle (Japanese Patent Application Laid-Open No. 54-71495). With such an apparatus, a plurality of machining points of a workpiece are machined with a plurality of tools, so that the machining time is shorter than a case where all the plurality of machining points of a workpiece are machined with one tool. Can be shortened.

[0003]

However, when one of the grindstones is not in a workable state, for example,
When it becomes necessary to modify the grindstone such as grinding or exchanging the grindstone, the grindstone is modified, and the other grindstone completes the machining at the processing position of the other grindstone. At that point, it is in a hibernation state. Therefore, in spite of having two grindstones, one grindstone cannot be machined, so that the machining time becomes longer.

The present invention has been made in view of the above-described circumstances, and has as its object to provide a machining method and a machining apparatus capable of shortening the machining time of a workpiece.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, according to the first aspect of the present invention, there is provided a machining method for simultaneously machining a plurality of machining points of a single workpiece with tools respectively attached to two tool stands. A tool table for machining a plurality of machining points of the workpiece is designated in advance, and the plurality of machining points are machined with a previously designated tool table. When the machining of all of the plurality of machining places is completed, and the machining of the plurality of designated machining places of the other tool stand is not completed, the designation of the other tool stand is performed by the one tool stand. Unprocessed processing points among the processed processing points are processed.

According to a second aspect of the present invention, there is provided a machining method for simultaneously machining a plurality of machining points of a single workpiece with tools attached to two tool stands, respectively. When a tool table for processing a processing location is specified in advance, the plurality of processing locations are processed by a pre-specified tool platform, and when the processing of the plurality of predetermined processing locations of one of the tool platforms is completed. It is determined whether or not the other tool table is in a workable state, and when it is determined that the other tool table is not in a workable state, the unprocessed processing portion of the other tool table is determined by the one tool table. I am trying to process it.

According to a third aspect of the present invention, there is provided a workpiece table for supporting a workpiece having a plurality of processing locations, two tool tables provided with tools for processing the workpiece, and the tool table. Moving means for relatively moving with respect to the workpiece table for processing the workpiece, and a processing section storage means for storing which of the tool tables is used to process a plurality of processing locations of the workpiece. A machining completion storage means for storing the presence or absence of completion of machining at the machining location; and a moving means for machining the machining location related to the tool platform for each tool table based on the storage of the machining section storage means. First control means, state determination means for determining the completion state of processing of the other tool table when processing by one of the two tool tables is completed, and processing of the other tool table by the state determination means Has been completed When it is determined that the unprocessed machining position stored in the machining completion storage means among the machining locations of the other tool table stored in the machining section storage means when it is determined that the machining is performed by the one tool, Second control means for controlling the moving means.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the state determining means determines whether the other tool table is in a workable state, and the second control means When it is determined that the machine is not in a workable state, the unprocessed machining location stored in the machining completion storage means among the machining locations of the other tool table stored in the machining category storage means is the one of the ones. The moving means is controlled so as to perform machining with a tool table.

A machining method according to claim 1 is a method for simultaneously machining a single workpiece having a plurality of machining points by using tools on two tool stands.

[0010] A tool table for machining a plurality of machining points of the workpiece is designated in advance, and the plurality of machining points are machined with the previously designated tool table, and machining is performed using one of the tool stands. When the processing of the location is completed, if the processing of the processing location by the other tool table is not completed, the unprocessed processing location of the processing location by the other tool platform is processed by the one tool platform.

As described above, when the machining of one of the tool tables is completed and the machining of the other tool table is not completed, the unprocessed portion of the other tool table is machined by the one tool table. Therefore, the workpiece can be machined by effectively operating the tool table, and the machining time can be shortened.

According to a second aspect of the present invention, when the machining by one of the tool tables is completed, it is determined whether or not the other tool table is in a workable state, and it is determined that the other tool table is not in a workable state. In such a case, one of the tool stands is used to machine an unprocessed part by the other tool stand.

As described above, when one of the two tool rests becomes unusable, the other tool rest takes over the machining, so that the tool rest is effectively operated to machine the workpiece. Therefore, the processing time can be shortened.

According to a third aspect of the present invention, there is provided an apparatus for simultaneously processing a plurality of processing locations on a workpiece with a plurality of tool tables.

As described above, when any one of the plurality of tool stands is not in a workable state, a machining portion of the workpiece to be machined is processed by a tool stand other than the tool stand not in the workable state. The workpiece can be machined by effectively operating the table, thereby shortening the machining time.

According to a third aspect of the present invention, there is provided a machining apparatus for simultaneously machining a plurality of machining locations on a workpiece with a plurality of tool tables.

The moving means moves a tool table for processing a plurality of processing locations on the workpiece.

The processing section storage means stores the relationship between each processing location and the tool stand.

The processing completion storage means stores the presence or absence of the processing completion of the processing location.

The first control means controls the moving means for each tool table based on the storage of the processing section storage means so as to process a processing position related to the tool table.

The state judging means judges the completion state of the machining of the other tool table when the machining by one tool table is completed.

The second control means, when the state determination means determines that the processing of the other tool table has not been completed, among the processing positions of the other tool table stored in the processing section storage means. The moving means is controlled so that the unprocessed processing portion stored in the processing completion storage means is processed by the one tool.

As described above, when the pre-specified machining on one tool table is completed, it is determined whether the pre-specified processing on the other tool table is not completed, and the other tool is determined. One of the tool tables assists the processing of the other tool table when the processing specified in advance by the table is not completed, so that the tool table can be operated effectively and the workpiece can be processed. Can be shortened.

According to a fourth aspect of the present invention, there is provided a machining apparatus which determines whether or not the other tool base in the third aspect is in a workable state. Is an apparatus that processes the data on one processing table instead.

Thus, the workpiece can be machined by effectively operating the tool, and the machining time can be shortened.

In the above description, the tool may be a grindstone. In this case, if the grindstone has been corrected, it is determined that the machine is not in a workable state.

If the grindstone has been modified, for example, the grindstone is polished or the grindstone is replaced.

[0028]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, a machine device according to the present embodiment comprises a work table 12, a right X-axis feed table 14, and a left X-axis feed table 16 on a bed 10.
It is a grinding machine provided with.

The work table 12 is provided with a headstock 18 having a servomotor (not shown) and a tailstock 20. A spindle 24 is rotatably mounted on the headstock 18, and a tailstock 20 is rotatably supported on a tailstock 30. Between the tailstock 24 and the spindle 30, a work piece is provided. Of the crankshaft 22 is held by a hydraulic chuck 26 of the main shaft, and the other end is rotatably supported by a center 31 mounted on a tailstock shaft 30.

The center 31 is movable in the axial direction and moves according to the length of the crankshaft 22.

The headstock 18 and the tailstock 20 are provided with grindstone correcting devices 32 and 34, respectively. The grindstone correcting devices 32 and 34 mainly include a motor 36 and a grindstone correction tool 38, and are retreated from a grinding position when a right grindstone table 54 and a left grindstone table 62, which will be described later, respectively, perform a grindstone correction operation. ing.

An unillustrated sizing device is mounted on the bed 10 to measure the dimensions of the crankshaft 22 as appropriate.

The right X-axis feed table 14 and the left X-axis feed table 16 are respectively moved in the X-axis direction via a right X-axis ball screw 42 and a left X-axis ball screw 46 arranged along the X-axis guide rail 40. It is supported so that it can move.

The right X-axis ball screw 42 is rotated by the right X-axis servomotor 44 to move the right X-axis feed table 14 in the X-axis direction.
Is rotated by the left X-axis servo motor 48 to
The axis feed table 16 is moved in the X-axis direction. The right X-axis servomotor 44 and the left X-axis servomotor 48 are provided with encoders 50 and 52, respectively.

The right X-axis feed table 14 is supported by a right Y-axis servomotor 60 so as to be movable in the Y-axis direction along a right Y-axis guide rail 56 by a rotating right Y-axis ball screw 58. Right side grindstone table (tool table) 5
4 is provided.

Similarly, the left X-axis feed table 16 has
The left Y-axis servo motor 68 rotates the left Y-axis ball screw 66 along the left Y-axis guide rail 64 to rotate
A left grindstone table (tool table) 62 movably supported is provided.

The right Y-axis servo motor 60 and the left Y-axis servo motor 68 are provided with encoders 70 and 72, respectively.

The right wheel base 54 is provided with a right wheel 74 as a work tool, which is supported on a shaft rotated by a motor (not shown). Similarly, the left grindstone table 62 is provided with a left grindstone 76 as a work tool, which is supported on a shaft rotated by a motor (not shown).

Next, a block diagram of the grinding machine of the present embodiment will be described.

As shown in FIG. 2, the present control system includes a numerical controller 78. The numerical control device 78 includes a CPU 80 for controlling the right wheel and a CPU 90 for controlling the left wheel,
The M109 and the RAM 111 are configured to be mutually connectable via a bus 88. Note that the right whetstone control CPU 8
The 0 and left-side grinding wheel control CPU 90 constitute the first control means and the second control means of the present invention.

To the left wheel control CPU 80, via the interface 82, the wheel correction device 32, the control circuit 84 for the X-axis servomotor, and the control circuit 86 for the Y-axis servomotor.
Is connected. The X-axis servo motor control circuit 84 is connected to the right-side X-axis servo motor 44.
As described above, the axis servomotor 44 includes the encoder 5.
The encoder 50 is connected to a control circuit 84 for an X-axis servo motor.

The right Y-axis servomotor 60 is connected to the Y-axis servomotor control circuit 86, and the encoder 70 described above is arranged on the right Y-axis servomotor. It is connected to the control circuit 86.

The CPU 90 for controlling the grinding wheel on the left side includes, via an interface 92, the grinding wheel correcting device 34, the control circuit 94 for the X-axis servo motor, the control circuit 96 for the Y-axis servo motor, and the control circuit 98 for the spindle servo motor. It is connected.

An X-axis servomotor control circuit 94 is connected to a left-side X-axis servomotor 48, and an encoder 52 is arranged on the left-side X-axis servomotor 48. It is connected to the control circuit 94.

The left X-axis servo motor 68 is connected to the Y-axis servo motor control circuit 96, and an encoder 72 is arranged on the left X-axis servo motor. The encoder 72 is connected to the Y-axis servo motor control circuit. 96. A spindle servomotor 18W is disposed in the spindle servomotor control circuit 98.
An encoder 18E is arranged at 8W, and the encoder 18E is connected to a control circuit 98 for the spindle servomotor.

An input / output device 107 including a CRT 103 and a numeric keypad 105 is connected to the bus 88 via an interface 101.

The ROM 109 stores a direct sizing plunge program, a direct sizing traverse program, an indirect sizing plunge program, and the like, which will be described later. Also,
The ROM stores a program corresponding to the main control routine shown in FIGS. 3, 4, and 6. Further, the ROM 109 stores a grindstone correction program shown in FIG. These programs are read out when the numerical controller 78 is powered on and read
It is recorded in a work area (not shown) of the AM 111, and is read and executed at each processing.

The RAM 111 is provided with a management table, a right grindstone correction information storage area, a left grindstone correction information storage area, and the like, which will be described later.

Next, the operation of the present embodiment will be described.

Processing (grinding) in the present embodiment
Indicates an operation for cutting the work piece 22, and the modification of the grindstone and the replacement of the grindstone during the grinding of a plurality of grinding portions are not included in the machining.

Prior to the machining, the operator determines the machining locations n = 1 to n = 4 of the crankshaft 22 and the grinding method for each machining location n = 1 to n = 4. A grinding method and a grinding section corresponding to each processing location are input via the 107 as shown in Table 1, and stored in the management table. Note that the grinding section corresponding to each processing location in the management table corresponds to the processing section storage means of the present invention.

[0053]

[Table 1] The determination of the grinding method may be automatically performed by the numerical controller 78 in consideration of the grinding accuracy, the grinding time, and the like.

The management table (Table 1) is further provided with a machining completion section area indicating whether or not the machining of the machining location has been completed. When 1 or 0 is stored in the processing completion division area, it indicates that the processing of the processing location is completed or not completed. The processing completion division area corresponding to each processing location corresponds to the processing completion storage means of the present invention.

In FIG. 3, the main control routine executed by the CPU 90 for controlling the left grindstone is indicated by a solid line. Note that the main control routine executed by the right wheel control CPU 80 is the same as the main control routine executed by the left wheel CPU 90 (indicated by a broken line in FIG. 3). Only the main control routine will be described, and the description of the main control routine executed by the right wheel control CPU 80 will be omitted.

That is, when a start key (not shown) is turned on, a main control routine shown in FIG. 3 is executed. In step 100, a processing portion in charge of the left wheel head is processed. Process the processing location.

Next, the processing of the left wheel grindstone in step 100 will be described in detail.

FIG. 4 shows a left wheel head machining processing routine. In step 100, a variable n for identifying a machining location is set to 1, and in step 104, the machining location identified by the variable n is It is determined with reference to the management table (Table 1) whether or not the person is in charge of the left wheel head.

If the processing location n is in charge of the left grinding wheel head, it is determined in step 106 whether the processing of the processing location n has not been completed.

If the processing of the processing location n is not completed, the left grindstone 76 is positioned at the processing location n in step 108, and the grinding method of the processing location n is read from the management table in step 110.

At step 112, the processing location n is ground in accordance with the program of the specified grinding method.

In step 114, the fact that the processing of the processing location n has been completed (information 1) is stored in the area (processing completion classification area) corresponding to the processing location n in the management table.

On the other hand, steps 104 and 106
Is negative, the process proceeds to step 116.

In step 116, it is determined whether or not all the processing positions in charge of the left grinding wheel head have been processed. If the processing of all the processing portions in charge of the left wheel head has not been completed, the variable n is incremented by 1 in step 118, and the process returns to step 104 to execute the above processing (steps 104 to 116). Then, when the processing of all the processing places in charge of the left wheel head is completed, the present routine ends, and the routine proceeds to step 200.

With the above processing, the processing of all the processing positions in charge of the left wheel head is completed.

As described above, the above is the main control routine executed by the left wheel control CPU 90, but the same applies to the main control routine executed by the right wheel control CPU 80. By the way, in this embodiment, as described above, when the processing of one processing portion is completed, the grindstone correction processing shown in FIG. 5 is interrupted and executed (step 120). Although the grinding wheel correction program shown in FIG. 5 is executed by the right-side grinding wheel control CPU 80, the left-side grinding wheel control CPU 90 similarly executes this grinding wheel correction program. The right wheel control CPU 80 and the left wheel control CP
The grinding wheel correction program of each of the U90 is executed every time the machining of the machining location is completed, or executed according to the operator's instruction via the input / output device 107 (step 13 in FIG. 5).
6 to step 142).

In step 132 of FIG. 5, a variable L indicating the number of times the processed portion has been machined by the right side grindstone is incremented by one.
Determine if it is equal to zero. If the variable L is not equal to the upper limit of the number of times of processing, this routine ends, and the process returns to step 104 of the flowchart of FIG. If the variable L is equal to the upper limit value of the number of times of processing, it is necessary to correct the right grinding wheel. If the right-side grinding wheel has been corrected, 0 is stored in the right-side grinding wheel correction information storage area in step 140, and the variable L is set to 0 in step 142, and the process ends. In addition, this grindstone correction (Step 136-
When step 142) is executed, the present embodiment ends without returning to the flowchart of FIG.

As described above, whether 1 or 0 is stored in the right grindstone correction information storage area can determine whether the right grindstone is being modified.

Next, the right-side grinding stone processing in step 200 will be described in detail.

FIG. 6 shows the routine of the right-side grinding stone processing, and in step 202, as described above,
By determining whether or not 1 is stored in the right grinding wheel correction information storage area of the RAM 111, it is determined whether or not the right grinding wheel head is being corrected.

If the wheelhead on the right side is being modified, the variable n is set to 1 in step 204 and
Then, it is determined whether or not the processing location n is in charge of the right grinding wheel head. If the processing location n is in charge of the right grinding wheel head, in step 208, it is determined whether or not the processing of the processing location n is completed. Judge. If the processing of the processing location n is not completed, the grindstone is positioned at the processing location n in step 210, and the grinding method of the processing location n is read from the management table in step 212, and the grinding method denied in step 214 According to the program of the method, the processing location n is ground.

At step 216, the fact that the machining of the machining location n has been completed is stored in the management table.

Steps 206 and 20
If the determination at step 8 is negative, the process proceeds to step 218. At step 218, it is determined whether or not the processing of all the processing portions in charge of the right wheel head has been completed. If the processing of all the processing portions in charge of the right wheel head has not been completed, the variable n is incremented by 1 in step 220 and
Returning to step 04, the above-mentioned processing (steps 204 to 218) is executed, and when the processing of all the processing points of the right wheel head has been completed, this routine ends.

Although the above description has been made with reference to the case where the right wheel is modified, the left wheel may be modified in some cases. In this case, there is a case where the processing portion in charge of the left grindstone is processed by the right grindstone while the left grindstone is being corrected (FIG. 4: Step 106 is negatively determined).

As described above, according to the present embodiment,
If any of the two wheels is being modified,
After the other grindstone head has completed its own processing, it performs the work in charge of the grindstone head being modified, so that the two grindstone heads can be operated efficiently, thereby shortening the machining time.

Further, in this embodiment, it is automatically determined whether or not one of the two grinding wheels is being modified, and if one of the grinding wheels is being modified, Since the other grindstone head automatically executes the processing for the one grindstone head, the work piece can be efficiently machined without any trouble for the operator.

In the embodiment described above, the case where the grindstone is modified (polishing or replacement of the grindstone) is described as an example. However, the present invention is not limited to this. The same applies to the case where the work is not possible.

In the above-described embodiment, the grinding stone is
Although the present invention has been described with reference to one example, the present invention is not limited to this, and a plurality (3, 4,...) Other than two can be similarly applied.

Further, in the above-described embodiment, the working method and the like are determined in advance for each grinding wheel head. However, the present invention is not limited to this. Decide which part to process or not,
The determined processing location may be processed.

In the above-described embodiment, an example in which a grindstone is used as a tool has been described. However, the present invention is not limited to this, and a tool other than a grindstone (for example,
Cutting tools, etc.) can be similarly applied.

[0081]

As described above, according to the first aspect of the present invention, when the machining by one of the tool stands is not completed when the machining of one of the tool stands is completed, the other is performed by the other tool stand. Since the unprocessed processing portion of the tool table is processed, the tool table can be effectively operated to process the workpiece, and thus the processing time can be shortened.

According to a second aspect of the present invention, when one of the two tool stands becomes unusable, the other tool stand takes over the shoulder of machining, so that the tool stand is effectively operated and the workpiece is Can be processed, and the processing time can be shortened.

According to a third aspect of the present invention, when any one of the plurality of tool stands is not in a workable state, a machining portion of the workpiece is not machined by a tool stand other than the tool stand that is not in a workable state. Therefore, there is an effect that the workpiece can be machined by effectively operating the tool stand, and the machining time can be shortened.

According to a fourth aspect of the present invention, it is determined whether or not the other tool table is in a workable state, and when the other tool table is not in a workable state, the processing location of the other tool table is replaced by one of the work tables. Therefore, the tool can be operated effectively to machine the workpiece, and the machining time can be shortened.

[Brief description of the drawings]

FIG. 1 is a top view of a machine tool according to the present embodiment.

FIG. 2 is a block diagram of the machining apparatus according to the embodiment.

FIG. 3 is a flowchart showing a main control routine of the left wheel head.

FIG. 4 is a flowchart showing a left-side grinding wheel processing routine of step 100 in FIG. 3;

FIG. 5 is a flowchart illustrating a right wheel grinding processing routine that is interrupted and executed each time processing of a processing portion is completed.

FIG. 6 is a flowchart showing a right-side grinding wheel processing routine of Step 200 in FIG. 3;

[Explanation of symbols]

 22 Crankshaft 74 Grindstone 76 Grindstone 54 Right grindstone head 58 Right Y-axis ball screw 60 Right Y-axis servo motor 62 Left grindstone base 66 Left Y-axis ball screw 68 Left Y-axis servomotor 42 Right X-axis ball screw 46 Left X-axis ball Screw 44 Right X-axis servo motor 48 Left X-axis servo motor 78 Numerical controller 80 CPU for right wheel control 90 CPU for left wheel control

Continuing from the front page (72) Inventor Makoto Nonoyama 1-1-1, Asahi-cho, Kariya-shi, Aichi, Japan Toyota Machine Works Co., Ltd. (72) Inventor Kenji Matsuba 1-1-1, Asahi-cho, Kariya-shi, Aichi Prefecture Toyoda Machine Works Co., Ltd. (72) Inventor Keita Goto 1-1-1 Asahi-cho, Kariya-shi, Aichi F-term in Toyota Koki Co., Ltd. (reference) 3C034 AA13 AA19 DD07 DD20 3C045 AA10 BA06 CA12 DA06 DA21 EA02

Claims (4)

[Claims] 1. A machining method for simultaneously machining a plurality of machining locations of a single workpiece with tools respectively attached to two tool stands, wherein the tool machining the plurality of machining locations of the workpiece. When a table is designated in advance, the plurality of machining points are machined with a tool table designated in advance, and when all machining of the plurality of designated machining points in one of the tool tables is completed, the other tool is used. A machining method for machining an unmachined machining location among the designated machining locations of the other tool base by the one tool base when the processing of a plurality of predetermined machining sites of the base is not completed. . 2. A machining method for simultaneously machining a plurality of machining locations of a single workpiece with tools respectively attached to two tool stands, wherein the tool machining the plurality of machining locations of the workpiece. Specify a table in advance, process the plurality of machining points with a pre-specified tool table, and when the processing of the plurality of pre-specified processing points of one of the tool tables is completed, the other tool table is A machining method for judging whether or not it is in a workable state and, when it is judged that the other tool stand is not in a workable state, machining an unprocessed machining portion of the other tool stand with the one tool stand. 3. A workpiece table for supporting a workpiece having a plurality of machining points, two tool tables provided with tools for processing the workpiece, Moving means for relatively moving with respect to the work table for processing; processing section storing means for storing which tool table is to be used for processing a plurality of processing locations of the workpiece; processing of the processing location Machining completion storage means for storing the presence or absence of completion, and for each tool base based on the storage of the machining section storage means,
First control means for controlling the moving means so as to machine a machining portion relating to the tool table; and when machining by one of the two tool tables is completed, judging a completion state of machining of the other tool table. State determination means; and when the state determination means determines that the processing of the other tool table is not completed, the processing completion storage of the processing positions of the other tool table stored in the processing division storage means And a second control means for controlling the moving means so that the unprocessed processing portion stored in the means is processed by the one tool. 4. The state determination means determines whether or not the other tool table is in a workable state, and when the second control means determines that the work is not in a workable state, Controlling the moving means so that the unprocessed processing portion stored in the processing completion storage means among the processing positions of the other tool table stored in the processing section storage means is processed by the one tool table. The machine tool according to claim 3, wherein: