JP2836383B2 - Machining axis assignment information creation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for creating machining axis assignment information, and more particularly to a machining system which takes into account the cutting power generated for each axis when assigning machining axes to a target gear box on a CAD system. Having a function of determining whether or not a machining axis can be assigned.

[0002]

2. Description of the Related Art In recent years, with the progress of computers and graphic displays and their peripheral technologies,
A designer (computer) using graphic information as a medium
A so-called CAD (computer-aided design) system for designing using a computer has been put to practical use, and its application range is expanding.

As a part of this, recently, it has been attempted to apply this CAD system to a tooling layout, for example, an operation of allocating a tool machining axis to a gear box. That is, in a gearbox having a plurality of output shafts for one input shaft, an operation of assigning a plurality of machining axes to the gearbox is performed on a CAD system.

In general, when allocating machining axes, it is necessary to design so that the total of the cutting power generated in each assigned machining axis does not exceed the allowable cutting power of the drive motor. Above, when assigning multiple machining axes to the target gearbox,
There is no apparatus having a function of determining whether or not to assign a processing axis in consideration of the cutting power generated for each axis. In the conventional assignment work, the machining power generated for each machining axis is separately calculated on a desk, and then the machining axis is assigned on a CAD system. At this time, the calculation of the cutting power for each processing axis is performed in step processing units, for example, in the case of step processing in which cutting conditions such as a feed speed change during cutting of a processing hole.

[0005]

However, such a conventional machining axis assignment system on CAD is merely a drawing system, and no technical support is incorporated therein. Since it is not possible to incorporate target support into the design on the system, it must be said that the CAD system has not been used effectively.

Further, in the conventional system, when the cutting conditions are changed by a design change, it is necessary to reconfirm the cutting power conditions and reset the work axis assignment on the desk.
At this time, the calculation of the cutting power on the desk is an extremely complicated operation, and a design change can frequently occur in an actual design, so that a large number of design steps are required for each design change.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and provides machining axis assignment information capable of automatically performing machining axis assignment work based on cutting power conditions on a CAD system. It is intended to provide a device.

[0008]

According to the present invention, there is provided a machining axis assigning means for assigning one or more machining axes to one gear box based on preset machining axis information; Among the cutting condition information preset for each machining axis assigned by the machining axis assigning means , the machining axis feed rate is set to each machining axis.
To the lowest feed rate among the set feed rates
Cutting condition correcting means for correcting so as to match, and cutting for calculating a cutting power generated in each of the processing axes based on the cutting condition information in which the processing axis feed speed is corrected by the cutting condition correcting means to derive a total value. Power calculation means, and the total value of the cutting power of each machining axis obtained by the cutting power calculation means
And the permission of the drive source of the gear box set in advance.
Compared with the allowable cutting power value, the total
A machining axis assignment status determining means for determining whether or not exceed the power values, those by the machining axis allocation status determining means
Machining axis allocation information, characterized by having a resetting means for resetting the allocation or cutting conditions of the working shaft when said sum value is judged to exceed the allowable cutting power value
It is a report creation device.

[0009]

[Action] In the present invention configured as described above, after the first machining axis assignment means has assigned one or more machining axes into a single gearbox on the basis of the machining axis information, each machining cutting condition modifying means Machining axis feed in axis cutting condition information
Set the speed to the slowest of the machining axis feed speeds.
Make modifications. The cutting power calculation means calculates the cutting power dynamically generated in each processing axis based on the corrected cutting condition information of the processing axis feed speed, and derives a total value thereof.
Next, the machining axis assignment status determination means performs the cutting power calculation step.
The total value of the cutting power of each machining axis obtained by the step and
Allowable cutting motion of the gear box drive source that has been set
Force value, the total value determines the allowable cutting power value.
It is determined whether it does not exceed. Result of this determination, if the total value of the cutting force is determined to exceed the allowable cutting power value, the resetting means performs a re-correction of resetting or cutting conditions allocation processing axis, simulation again Be executed. In contrast, when the total value of the switching cutting power as a result of the determination is determined not to exceed the allowable cutting power value, and confirm the machining axis allocation status, and outputs it as machining axis allocation information.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a hardware configuration according to an embodiment of the present invention, FIG. 2 is a conceptual diagram showing a software structure of the embodiment, FIG. 3 is a flowchart showing a processing procedure in the embodiment, and FIG. Sectional view showing an example of a shaft,
FIG. 5 is an explanatory diagram showing an example of step feed machining, FIG. 6 is an explanatory diagram showing an example of a machining axis assignment situation, FIG. 7 is an explanatory diagram showing an example of correction of cutting conditions, and FIG. 8 is a graph of cutting power. FIG. 9 is an explanatory diagram showing one display example.

As shown in FIG. 1, the hardware configuration of the present embodiment is similar to the configuration of a general CAD system, and is a graphic display device used by a designer instead of a conventional drawing board or pencil as an input device. 10 (hereinafter simply referred to as display), light pen 11, keyboard 1
2, a tablet 13 and the like, and a designer can input data, commands, and the like to the computer 14 by operating the light pen 11, the keyboard 12, and the like. An external storage device 15 is connected to the computer 14, and processing results, data, and the like of the computer 14 are stored therein. The computer 14 has an automatic drafting machine (plotter) as an output device.
16 and a printer 17 are connected so that a drawing such as a processing axis assignment status and a tooling layout can be drawn as required, and data and calculation results can be printed.

Further, as shown in FIG. 2, the system structure (software structure) of this embodiment includes initial data (specifically, machining hole information and machining axis information described later) on which machining axes are allocated. , And cutting condition information), an assignment information database 19 for storing machining axis assignment data (including cutting power information to be described later) for the gearbox, and a machining axis to be described in addition to machining axis assignment. Assignment execution module 20 having contents of executing the condition correction and the calculation of the cutting power, and a determination module 2 for determining whether or not the allocation status is appropriate based on the cutting power information.
1, a resetting module 22 for resetting a machining axis, which will be described later, and executing a cutting condition re-correction, and an assignment display module 23 for displaying the assignment data to the outside. The display device 24 displays a graph related to the processing axis assignment status and the cutting power.
Specifically, it is displayed on the display 10 and output by the plotter 16 and the printer 17. The machining axis assigning means, the cutting condition correcting means and the cutting power calculating means are constituted by the assignment executing module 20, the machining axis assignment status judging means is constituted by the judging module 21, and the resetting means is constituted by the resetting module 21.

Next, specific processing of the machining axis assignment system according to the present embodiment will be described with reference to the flowchart shown in FIG. First, in steps 1 to 3, various initial data which are the basis of the assignment work are defined. These are stored in the initial information database 18.

First, all the target processing holes are converted into data in advance, and the type of processing and shape parameters (processing diameter, processing depth, etc.) are defined (step 1).

Next, a machining axis corresponding to each machining hole is defined based on the machining hole information, and is converted into data. This machining axis information holds tool specifications (tool type, tool diameter, tool length, etc.), holder specifications, bearing specifications, etc., and arrangement information of these components (step 2). FIG. 4 shows an example of a machining axis. In FIG. 4, a drill 25 is inserted into a holder 26 and the
7 is attached to the spindle 29 of the gear box 28 via the same.

Next, the feed rate, the cutting speed, the number of rotations of the shaft, the starting position of the machining are obtained from the above-mentioned machining hole information and machining axis information.
Define cutting conditions such as (from) and end position (to). In the case of step-feed machining, it is clearly defined which area of the machined hole is under what cutting conditions (step 3). FIG. 5 shows an example of step feed processing using a drill. As shown in FIG. 5, for each of step feed 1 and step feed 2, the processing position (from-to) and cutting conditions (feed speed, feed speed,
Cutting speed) is defined.

Next, based on the various data defined above, the system executes the assignment execution module 20 to determine which machining axis is assigned to the target gearbox (step 4). FIG. 6 shows an example of the assignment. Here, four drills 25a to 25d are assigned to the gear box 28. In the figure, reference numeral “30” denotes a gear box outer frame, “31” denotes a gear box inner frame, “32” denotes a machining axis center point, “33” denotes a bearing outer diameter, “P” denotes a shaft disposable area, and “Q” "Indicates a shaft arrangement dangerous area," R "indicates a shaft arrangement prohibition area, and each of the drills 25a to 25d is a gear box inner frame 31.
Are allocated so that the bearing outer diameters 33 do not interfere with each other. The data on the assignment status is stored in the assignment information database 19 and can be displayed on the display 10 at any time by driving the assignment display module 23, for example.

When a plurality of machining axes are assigned to the target gear box in step 4, the cutting condition correcting module in the assignment executing module 20 in the system is driven to automatically perform a cutting condition correcting operation. Do. Specifically, when a plurality of machining axes are assigned to one gear box, the feed speed (mm / mi) in the cutting conditions set for each assigned machining axis is driven by one motor.
n) needs to be the same, so the cutting conditions are modified accordingly (step 5). FIG. 7 shows an example of modification of the cutting conditions in consideration of step machining. In the figure, A is an axis for step machining, and B is an axis for normal machining, and shows three cases (a) to (c). The basics of modifying cutting conditions here are:
This is to adjust the feed rate (mm / min) to the minimum value. Therefore, in the case (a), the axis A of the step machining is changed to the ordinary machining, and in the cases (b) and (c), the axis B of the ordinary machining is changed to the step machining. At this time, conversion between step processing and normal processing is performed by referring to the hole reference position and step feed position information corresponding to each axis.

Next, the cutting power calculation module in the assignment execution module 20 in the system is driven to calculate the cutting power for each machining axis based on the cutting conditions corrected in step 5. At that time, since the cutting power dynamically changes depending on the cutting part, for example, the cutting power (KW) on the vertical axis,
The cutting power is calculated in a form that can be expressed in a graph with the processing part (mm) on the horizontal axis. When step machining is performed, the cutting power is calculated for each step (step 6).

Next, the system makes a graph of the total sum of the cutting power generated from the machining start point to the machining end point based on the data of the cutting power for each axis calculated in step 6, and plots this graph. The information is displayed on the display 10 by driving the assignment display module 23, for example. At this time, the permissible cutting power value of the drive motor (output shaft) given to the gearbox is set in the above graph so that it is possible to confirm whether the assignment of the processing axis or the setting of the cutting condition satisfies the condition relating to the cutting power. Also described above. This graph data is stored in the assignment information database 19 (step 7). FIG. 8 shows a display example of the graph. Here, in the case of step machining (step feed 1 and step feed 2), the total value of the cutting power generated on the three machining axes (E, F, G) is displayed in the form of a graph. The straight line H in the figure is the allowable cutting power value of the drive motor. The processing axis G is tapered.

Next, the system determines the judgment module 21
To determine whether the current assignment status is OK, that is, whether the sum of the cutting powers calculated in step 7 does not exceed the allowable value (step 8). If the sum of the cutting powers generated as a result of this determination does not exceed the permissible value (see FIG. 8), it is determined that the assignment of the machining axis and the setting of the cutting conditions satisfy the conditions on the cutting power side. That is, it is determined as OK, and the work of allocating the machining axis is completed. On the other hand, if the sum of the generated cutting power exceeds the allowable value (for example, FIG.
(See the chain line I in the case where the middle step was not processed.), It is judged as NG, and the process proceeds to the next step 9 in order to keep the total value of the cutting power within the allowable value by resetting.

In step 9, the reset module 2
The drive 1 determines whether to reset the assignment of the processing axis or to re-correct the cutting condition of each axis based on the excess amount of the cutting power or the like. If the former is selected, the machining axis assignment resetting module in the resetting module 21 is driven to assign the machining axis to the gear box again (step 10), and then the process returns to step 5. On the other hand, when the latter is selected, the cutting condition re-correction module in the resetting module 21 is driven to re-correct the cutting conditions for each processing axis (step 11).
Thereafter, the process returns to step 6. In any case, in the case of NG, resetting or re-correction is automatically performed and cutting power calculation is executed again.

Therefore, according to the present embodiment, when the work of allocating the machining axis is performed on the CAD system, the technical support of the cutting power is performed, the cutting power condition information is created, and the machining axis is created based on this information. It is possible to judge whether or not the assignment of the machining axis can be performed. By appropriately modifying the assignment of the machining axis while performing such a simulation, the C axis can be determined.
It is possible to optimize the cutting power condition and the cutting condition while performing the work of allocating the processing axis on the AD system.

In this embodiment, since the cutting power is converted into data in the form of a graph which can be dynamically expressed, it is possible to visually check at what point in the cutting and how much cutting power is generated. Can be.

Further, in this embodiment, the design is automatically made on the CAD system according to the data and the operation program set in advance, so that there is no individual difference in the design by the person in charge of the design when the design is changed. Can be unified. In addition, since the design is automatic, a significant reduction in design time is realized.

[0026]

As described above, according to the present invention, CA
It becomes possible to automatically perform a machining axis assignment operation based on the cutting power condition on the D system, thereby greatly improving the efficiency of tooling layout design.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a hardware configuration according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a software structure of the embodiment.

FIG. 3 is a flowchart showing a processing procedure in the embodiment.

FIG. 4 is a cross-sectional view illustrating an example of a processing shaft.

FIG. 5 is an explanatory diagram illustrating an example of step feed processing.

FIG. 6 is an explanatory diagram showing an example of a machining axis assignment status.

FIG. 7 is an explanatory diagram showing an example of cutting condition correction.

FIG. 8 is an explanatory diagram showing a display example of a graph of cutting power.

[Explanation of symbols]

Reference numeral 18: Initial information database 19: Assignment information database 20: Assignment execution module (machining axis assignment means, cutting condition correction means, cutting power calculation means) 21: Judgment module (machining axis assignment status judgment means) 22: Reset module (re Setting means) 23: Assignment display module 24: Display device

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G05B 19/4097 G05B 19/4068 G06F 17/50

Claims (1)

(57) [Claims] 1. A machining axis assigning means for assigning one or a plurality of machining axes to one gear box based on preset machining axis information, and a preset machining axis assigned by the machining axis assigning means. Of the cutting axis information
Set the feed rate among the feed rates set for each machining axis.
A cutting condition correcting means for correcting to match the lowest feed rate, and calculating a cutting power generated on each of the processing axes based on the cutting condition information in which the processing axis feed rate is corrected by the cutting condition correcting means. Cutting power calculating means for deriving the total value, and cutting power of each machining axis obtained by the cutting power calculating means.
The total value of the force and the preset gearbox
Compare with the allowable cutting power value of the drive source and calculate the total value.
A machining axis assignment status determining means for determining whether or not the allowable cutting power value is exceeded; and
Resetting means for resetting the assignment of the machining axis or the cutting condition when it is determined that the allowable cutting power value is exceeded, and a machining axis assignment information creating apparatus.