JP3275555B2 - 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 a machining axis assignment information creating apparatus for assigning a plurality of machining axes to a gear head on a CAD system, and more particularly to constraints on gear head design (gear ratio limit value, bearing arrangement position) and shift. The work of assigning the processing axis to the gear head is also performed in consideration of the processing setting.

[0002]

2. Description of the Related Art In a conventional machining axis assignment information creating apparatus for assigning a plurality of machining axes to a gear head on a CAD system, in order to avoid complicated work of correcting cutting conditions on a desk due to a design change, etc. At the same time as allocating the machining axis, the cutting conditions are optimized based on the cutting power and the material of the workpiece and the cutting tool, and the machining time can be easily verified. (See, for example, JP-A-6-19521).

As shown in FIG. 25, the gear head is a device for rotating a plurality of machining shafts 50 via a rotating shaft 52a of a motor 52. Each processing shaft 50 via a gear 51
Is transmitted to Each gear 51 is housed in the gear head 43.

[0004]

However, in such a conventional machining axis assignment information creating apparatus, the possibility of gearing of the gear head 43 is not considered at all when the machining axis assignment operation is performed. However, even if the cutting conditions are determined in consideration of the cutting power, the design of the gear head 43 may be physically hindered. This is because the size and weight of the gear head 43 are limited by the performance of the machine (base machine holding the gear head 43), the layout of production equipment, and the like. Therefore, it is desirable to construct a system that also takes into account such structural constraints of the gear head 43 when performing the work of allocating the machining axis.

[0005] For example, FIG. 10 is a view showing an example in which gearing becomes impossible even if the machining axis is allocated.
The circles in the figure represent gears. In FIG.
The gears mounted on each of the three processing axes W1 to W4 are all within the shaft arrangable area P of the gear head 43. However, the rotation number of the processing axis Between the three intermediate axes T1
The rotation is transmitted through T3 (hereinafter referred to as idle shaft). During this transmission, the speed is increased or decreased. However, in this example, one idle shaft T3 protrudes from the shaft arranging region P in order to realize the rotation speed of the machining shaft W4, so that gearing is physically impossible.

Further, in the above apparatus, no consideration is given to the presence or absence of the setting of the shift processing. That is, when the setting of the shift machining is performed, the gear ratio of the machining axis already assigned and defined may change. Since the change in the gear ratio means that the condition of the idle shaft changes, the shift ratio setting may not satisfy the gear ratio constraint condition in some cases. Therefore, it is also desired to perform a machining axis assignment operation that also takes into account shift machining settings.

Further, in the above apparatus, the bearing arrangement position is not considered at all, and it is not possible to automatically determine whether or not the bearing position can be corrected. That is,
As shown in FIG. 24, the machining shaft 50 is a rotating body and is held by the bearing 42. Usually, the bearing 42 is included in a structure (part) mounted on the machining shaft 50.
Has the largest outside diameter. Therefore, the pitch Ps between the axes of the adjacent machining axes (α axis and β axis) is the minimum value of the pitch (minimum center axis pitch) because the bearing outer diameter is a constraint.
Is determined. Specifically, since the thickness of the portion H in FIG. 24 must be equal to or larger than the allowable value in design, the minimum inter-axis pitch is given by the following equation. Minimum inter-axis pitch = α-axis bearing radius + β-axis bearing radius + allowable radial thickness However, in some cases, due to design reasons (for example, when simultaneous machining is required), the pitch may be less than the minimum inter-axis pitch. The machining axes may be arranged in the gear head in a positional relationship, which is possible by shifting the bearing positional relationship between adjacent machining axes. In other words, for example, when the positional relationship of the machining holes is at a distance that does not allow simultaneous machining, it is possible to correct the structure of the gear head and shift the bearing positional relationship to achieve simultaneous machining in consideration of the number of machines and the process setting. is there. In such a case, as described above, since the bearing position is not considered at all, as described above, when the positional relationship of the machined holes is satisfied, simultaneous machining is established (in other words, the correction of the bearing position is not performed). It is not possible to automatically determine how to correct the tooling layout diagram linked to such machining axis assignment information. Therefore, in order to efficiently design a gear head with high accuracy,
It is also desired to construct a system that also takes such constraints (bearing arrangement positions) into consideration.

The present invention has been made in view of such problems of the prior art, and also considers constraints (gear ratio limit values, bearing arrangement positions) on gear head design and shift processing settings on CAD. It is another object of the present invention to provide a machining axis assignment information creating device capable of performing a task of assigning a machining axis to a gear head.

[0009]

In order to achieve the above object, the present invention provides a machining axis assignment information creating apparatus for assigning a plurality of machining axes to a gear head on a CAD . Enter data and assignment instructions
Input device for inputting, and an input device input by the input device.
Cutting condition setting means for setting a cutting condition and its range based on force data, and a cutting condition set by the input device.
Machining axis assigning means for assigning a machining axis to a gear head in accordance with an assignment instruction, and assignment by the machining axis assigning means
Information file that stores the result of assignment as assignment information
And the machining assigned by the machining axis assigning means
A spindle rotation speed calculation means for calculating a spindle rotation speed of each axis, before the allocation information file is stored
The size of the gear head included in the serial allocation information and the Giahe
Based on the number of working axes assigned to head, gear
Gear ratio limit value setting means for obtaining a gear ratio limit value as a structural constraint of the head, for each of the assigned machining axes
Multiply the spindle speed by the gear ratio limit value,
Based on the result of the multiplication,
A motor shaft rotational speed setting means for setting a motor shaft rotational speed of the machining axes group consisting, when the motor shaft rotational speed setting means can not set the number of rotation the motor shaft, on the basis of the said gear ratio limit value and the multiplication result Te, cutting condition correcting weather certain machining axes
Cutting condition correction means for selecting the auxiliary processing axis and correcting the cutting condition for the cutting condition correction candidate processing axis .

The motor shaft speed setting means multiplies the spindle speed by the gear ratio limit value.
Means for determining and means for calculating the allowable motor shaft rotation speed of the machining axis, the motor shaft rotational speed of the machining axes groups based on the <br/> spindle speed and said permissible motor shaft speed Te, the motor
The spindle rotates when the over motor shaft rotation speed can not be determined
Based on the number and said allowable motor shaft speed, the machining spindle
A cutting condition correction candidate machining axis is selected as a candidate for correcting a cutting condition from the group, and information on the cutting condition correction candidate machining axis is selected.
And the tolerance of the machining axis other than the machining parameter correction candidate machining axis
It is configured to include a means for outputting a correction auxiliary information determined by the motor shaft speed.

Further, the cutting condition correcting means described above, prior to
Means for calculating the cutting speed of the cutting condition correction candidate machining axis on the basis of the serial motor shaft rotational speed setting means setting results (the cutting condition correction candidate machining axis information correction auxiliary information) and to said gear ratio limit value is calculated Means for comparing the cutting speed and the cutting condition range to determine whether or not to correct the cutting conditions. Further, the above-mentioned cutting condition correction means,
Information on the cutting condition correction candidate machining axis and the correction auxiliary information
Based on the information on the gear ratio limit value and the cutting condition compensation value.
Means for calculating the cutting speed of the normal candidate machining axis;
Compare cutting speed and cutting condition range to correct cutting conditions.
Means for determining whether or not the permission is granted.

[0012] Further, the above-mentioned device may be arranged such that
Whether step number information indicating the order of shift processing is included
If there is shift processing setting means for determining whether or not shift processing is set, and if there is shift processing setting ,
And the gear ratio limit value changing means for shift processing to change the gear ratio limit value of the machining axis groups already set, and setting the shift processing there
The machining axis assigned by the machining axis assigning means is
Used as other machining axis group in other shift machining order
And a motor shaft rotation speed correction means for correcting the motor shaft rotation speed of the other machining shaft group based on the gear ratio determined based on the gear ratio limit value .

Further, other processing axis allocation information generating apparatus of the present invention, in the processing axis allocation information generating apparatus for allocating a plurality of working axes to the gear head on CAD, split machining axis
An input device for inputting an assignment instruction and a deletion instruction,
Verify the positional relationship between the machining axes designated to be assigned by the force device , and correct the bearing position in the positional relationship.
Machining axis verification means for creating machining axis combination information including the possibility of bearing position correction availability information indicating availability, screen display creation means for creating a screen display reflecting machining axis combination information, and deletion input to the input device a machining spindle deleting means for deleting information about the specified machining axis by an instruction from the machining axis combination information, the processing shaft combination information and Beari
Select the machining axis to implement the bearing position correction based on the correction point information on adverse effects that occur when the correction of the ring positions, Bearin for the selected machining axis
The correction amount of the bearing position is calculated, and the correction amount of the bearing position is calculated.
And a bearing position correcting means for correcting the bearing position based on the detected position.

[0014] Then, the above-described processing between the axes verification means, the processing between axes verification means includes means for determining a combination of machining axis on the basis of the machining axis allocation information, and the bearing outside diameter information and wall thickness tolerance information A means for verifying the inter-axis pitch of the processing axis based on the processing axis position information and extracting a processing axis combination candidate requiring a bearing position correction, and verifying whether the bearing position correction is possible for the processing axis combination candidate. Means, and means for creating machining axis combination information based on the machining axis combination candidate information and the bearing position correction availability verification result.

Further, the above bearing position correcting means includes:
A condition file in which an adverse effect that occurs when the bearing position of the machining axis is corrected is converted into a point in advance and registered, and a point is calculated with reference to the condition file for each machining axis to create correction point information; Means for setting a group of machining axes for which the bearing position is to be corrected based on the machining axis combination information, and verifying whether the bearing position can be corrected for each group based on the machining axis combination information and the correction point information, and selecting a correction candidate. And means for determining a bearing correction amount for the selected correction candidate.

The above condition file includes a condition file relating to a hole position tolerance, a condition file relating to a machining portion surface roughness, and a condition file relating to a machining surface condition at a machining position. It is preferable that the distance is set using the distance between the bearing positions, the tool diameter, and the spindle diameter as keys.

[0017] In addition, the apparatus described above, the bearing position
The apparatus has a means for adding the correction amount of the position to the spindle protrusion amount.

Further, the above-mentioned apparatus is further provided with means for correcting the tooling layout diagram based on the corrected spindle protrusion amount.

[0019]

In the machining axis assignment information creating device configured as described above, in the machining axis assignment information creating device configured as described above, a predetermined data is input by the input device.
When a cutting data or assignment instruction is input, the cutting condition setting
Based on the input data entered by the input device.
Set the cutting condition and its range, and set the machining axis
Processing according to the assignment instruction input by the input device
Assign the shaft to the gearhead, and the assignment information file
The result of assignment by the machining axis assignment means is used as assignment information.
And the spindle rotation number calculating means assigns the machining axis
Spindle for each machining axis assigned by means
The number of revolutions is calculated, and the gear ratio limit value setting means sets
Information included in the assignment information stored in the
Size of the gearhead and machining assigned to the gearhead
Based on the number of shafts, the structural constraints of the gearhead and
To determine the gear ratio limit value, and the motor shaft speed setting means
The spindle rotation speed for each assigned machining axis
The gear ratio limit value is multiplied, and based on the multiplication result,
Motor axis rotation of the machining axis group consisting of the assigned machining axes
The number of rotations is set, and the cutting condition correcting means is configured to rotate the motor shaft.
If the number setting means cannot set the motor shaft speed,
Based on the multiplication result and the gear ratio limit value,
Select the machining axis as the candidate machining axis for cutting condition correction, and
The cutting conditions are corrected for the normal candidate machining axis. More specific
The motor shaft rotation speed setting means includes the spindle rotation
Multiplied by the gear ratio limit value, the allowable motor axis of the machining axis
Calculate the number of rotations and calculate the number of rotations of the spindle and the allowable mode.
The motor shaft speed of the machining axis group is determined based on the
When the motor shaft speed cannot be determined,
Based on the pindle rotation speed and the allowable motor shaft rotation speed
Of the machining axis group as candidates to correct the cutting conditions
Select the cutting condition correction candidate machining axis, and
Information on the auxiliary processing axis and the processing other than the cutting condition correction candidate processing axis
Correction compensation determined by the allowable motor shaft rotation speed of the machining shaft
Outputs auxiliary information. Further, the cutting condition correction means,
Setting result of the motor shaft speed setting means (cutting condition correction
Candidate machining axis information and correction auxiliary information) and the gear ratio limit value
Of cutting condition correction candidate machining axis based on
And compare the calculated cutting speed with the range of cutting conditions.
Determining the propriety of Kezujo matter of correction. Further, the cutting conditions
The correction means includes information on the cutting condition correction candidate processing axis and the
Based on the correction auxiliary information and the information on the gear ratio limit value,
Calculate the cutting speed of the candidate machining axis, and calculate the cutting speed.
Comparing the cutting speed with the range of cutting conditions,
It is determined whether it is positive.

Further, the setting of the shift processing is based on the assignment information.
Contains step number information indicating the order of shift processing
It is determined whether or not shift processing is performed, and if shift processing is set , the gear ratio limit value changing unit changes the gear ratio limit value of the processing axis group for which the shift processing has been set, and the shift processing setting is not performed. Yes and assigned by the machining axis assignment means
Machining axis is other machining axis group in the order of other shift machining
When used as a motor shaft rotational speed correction means the
The motor shaft rotation speed of the other processing shaft group is corrected based on the gear ratio determined based on the gear ratio limit value .

According to another machining axis assignment information creating apparatus of the present invention , a plurality of machining axes are formed on a gear head on a CAD.
Processing by input device when performing axis assignment work
Input axis assignment and deletion instructions and verify between machining axes
The machining axis whose means have been assigned by the input device
Verify the positional relationship between the bearings in the positional relationship
The bearing position correction availability information indicating whether the position can be corrected
Creates machining axis combination information, including screen display creation means.
Create a screen display that reflects the machining axis combination information, and
Deletion means specified by the deletion instruction input to the input device
Information on the processed machining axis from the machining axis combination information
Deleted, and the bearing position correction means
The negative effects that occur when correcting the bearing and bearing position
Bearing position compensation based on
Select the machining axis to perform the correction, and apply it to the selected machining axis.
Calculate the correction amount of the bearing position
The bearing position is corrected based on the correction amount . More specifically, the machining axis verification means determines the combination of machining axes based on the machining axis assignment information, and then determines the machining axis based on the bearing outer diameter information, the allowable thickness information, and the machining axis position information. Is verified, and machining axis combination candidates requiring bearing position correction are extracted. Then, verification of whether or not the bearing position correction is possible is performed on the processing axis combination candidate, and processing axis combination information is created based on the processing axis combination candidate information and the bearing position correction possibility verification result. When the machining axis combination information is created, the screen display creating means creates a screen display reflecting the machining axis combination information, and the machining axis deleting means displays, for example, information on the machining axis specified by the user who referred to the screen display. delete. Then, the bearing position correcting means selects a processing axis for which bearing position correction is to be performed based on the processing axis combination information and the correction point information, and corrects the bearing position. More specifically, the bearing position correcting means refers to various condition files (for example, hole position tolerance conditions, processing part surface roughness conditions, and processing surface state conditions at processing positions) for each processing axis. After calculating the correction point information, a group of processing axes for which the bearing position correction is performed based on the processing axis combination information is set, and the processing axis combination information and the correction point information are set for each set group. Verify whether the bearing position can be corrected based on the results, select a correction candidate,
A bearing correction amount is determined for the selected correction candidate.

The obtained bearing correction amount is added to the spindle protrusion amount, and the tooling layout diagram is corrected based on the corrected spindle protrusion amount.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an example of hardware constituting the machining axis assignment information creating device of the present invention. This device has a graphic display device 10 (hereinafter simply referred to as a display), a light pen 11, and a keyboard 1 used by a designer instead of a conventional drawing board or pencil as an input device, similarly to the configuration of a general CAD system.
2 and a tablet 13 (hereinafter, the keyboard 12 represents an input device for the sake of simplicity).
The user can input data, commands, and the like to the computer 14 by operating the operations described above. 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. Also, an automatic drafting machine (plotter) 16 and a printer 17 are connected to the computer 14 as output devices. Can be printed.

First Embodiment FIG. 2 is a functional block diagram according to a first embodiment of the above apparatus. In the present embodiment, the above-described device has a function of allocating a processing axis to a gear head in consideration of whether gearing of the gear head is possible and whether or not shift processing is set,
For example, an initial information input unit 20 for inputting initial information such as machining hole information and machining axis information, a cutting condition setting unit 21 for setting a cutting condition and a range thereof, an assignment setting unit 22 for assigning a machining axis to a gear head, A cutting condition correction unit 23 that corrects the cutting conditions in consideration of the cutting power, a workable time verification unit 24 that verifies whether the machine can operate in a preset workable time, and a spindle rotation of the target processing axis. Spindle speed calculator 2 for calculating the number
5, a gear ratio limit value setting unit 26 that sets a limit value of the gear ratio in the gear head, a shift processing determination unit 27 that determines whether there is a shift processing setting in the target gear head,
A motor shaft rotation speed setting unit 28 for setting the motor shaft rotation speed in the target processing shaft group; a cutting condition correction unit 29 for correcting the cutting condition of a specific processing axis when the motor shaft rotation speed cannot be set; Output processing unit 30 for processing
An initial information file 31 storing initial information, a cutting condition file 32 storing information on cutting conditions,
An allocation information file 33 for storing allocation information of a machining axis to a gear head, a gear ratio restriction information file 34 for storing gear ratio restriction information including a gear ratio restriction value, and a control unit (not shown) for controlling the whole of them. These are internally connected to each other via an input / output interface 35, and are also connected to external input devices (such as the keyboard 12) and output devices (such as the display 10, the printer 17, the plotter 16). The initial information file 31 has a memory area 31 for storing machining hole information.
a, a memory area 31b for storing machining axis information, and the like.

The initial information input section 20 is for inputting initial information from the input device 12 or another CAD system by an operator, and storing the initial information in a predetermined memory area in the initial information file 31. The initial information includes, as described above, machining hole information, machining axis information, and the like. The machining hole information defines the machining type and the shape parameters (machining diameter, depth, etc.) for the machining hole and converts them into data. The machining axis information defines the machining axis corresponding to each machining hole. It has become. Machining axis information includes tool specifications (tool type, diameter, length, etc.), holder specifications,
Bearing specifications and the like and arrangement information of each of these parts are stored. FIG. 3 is a cross-sectional view showing an example of the processing shaft. In the figure, the machining axis is the
1 and is attached to a spindle 44 of a gear head 43 via a bearing 42.

The cutting condition setting section 21 sets cutting conditions and their ranges for each machining hole based on input data from the input device 12 by the operator, and stores the set data in the cutting condition file 32. The cutting conditions consist of a cutting speed (m / min) and a feed amount (mm / rev), and the cutting condition range is constituted by their minimum and maximum values. That is, the cutting condition range includes the minimum value and the maximum value of the cutting speed, and the minimum value and the maximum value of the feed amount.
Cutting conditions and ranges are determined by the material of the tool. Table 1 below shows an example of cutting conditions and ranges.

[0027]

[Table 1]

The assignment setting unit 22 assigns a machining axis to a target gear head in accordance with an assignment instruction from the input device 12 by the operator, and stores the result (assignment information) in the assignment information file 33. FIG. 4 is a schematic diagram showing an example of the assignment of machining axes. Here, the gear head 43
Are assigned four drills 40a to 40d.
In the figure, "45" is a gear head outer frame, "46" is a gear head inner frame, "47" is a machining axis center point, "48" is a bearing outer diameter, "P" is a shaft disposable area, and "Q" is The axis arrangement dangerous area, “R” is the axis arrangement prohibition area, and each drill 40
a to 40d denote a shaft arrangable area P in the gear head inner frame 46.
And the bearing outer diameters 48 are assigned so as not to interfere with each other. The assignment information stored in the file 33 holds information on the size of the gear head and the number of machining axes assigned to the target gear head. For example, the size of the gear head is input by an operator, and the number of allocated machining axes is automatically counted.

Further, in the allocation information, when shift processing is set for the target gear head, a step number is assigned to the already set processing axis. Here, the step number indicates the order or order of the shift processing. For example, when four machining axes A, B, C, and D are assigned to the same gear head, machining is first performed with machining axes A and B, and then the arrangement position of the gear head is changed and machining axes C and When the setting is made to perform the next processing with D (this is called shift processing), the processing with the processing axes A and B is the first step, and the processing with the processing axes C and D is the second step. In the present embodiment, the setting of the shift processing is realized by repeatedly executing the processing axis assignment operation for the same gear head, and at this time, the step number is automatically given.

The cutting condition correction unit 23 automatically corrects the cutting conditions in consideration of the cutting power when a plurality of processing axes are assigned to the target gear head. Specifically, when a plurality of machining axes are assigned to one gear head, since they are driven by one motor, the feed rate (mm / min) in the cutting conditions needs to be the same. Modify the cutting conditions in that way. Here, the feed speed is adjusted to the minimum value. The feed speed of the machining axis is obtained by the following equation. Feed speed (mm / min) = spindle speed (rpm) x feed amount (m
m / rev) Then, the cutting power of each machining axis is calculated based on the corrected cutting conditions, and the sum of them is calculated for each machining position.
Compare with the allowable cutting power value of the drive motor (output shaft). If the sum of the cutting power exceeds the allowable value, the cutting conditions are re-corrected so that the total value of the cutting power falls within the allowable value due to the excess amount or the like. The cutting conditions thus modified are stored in the cutting condition file 32.

The workable time verification unit 24 verifies whether or not the machine can be operated within a preset workable time. In other words, if the feed rate is corrected, the machining time changes, and the total machining time of the machine that has the gear head under consideration also changes, so verify that the total machining time falls within the machining time. Is what you do. Specifically, the processing time required for each gear head allocated to the machine is integrated to calculate the total processing time of the machine, and the calculated total processing time is compared with a preset allowable processing time allowed for the machine. If the total machining time exceeds the possible machining time, or if there is little room for the possible machining time, the tool material is changed to shorten the machining time. The cutting conditions corrected with the change of the tool material are stored in the cutting condition file 32.

The spindle speed calculator 25 calculates the spindle speed of the machining axis to be allocated. The calculation is performed by the following equation. Spindle speed (rpm) = Cutting speed (m / min) / (Processing diameter
(mm) .pi. / 1000) Information on the calculated spindle speed is stored in the assignment information file 33 for each machining axis. As will be described later, the spindle speed information is used for setting the motor shaft speed and correcting cutting conditions. In the above calculation, the cutting speed (m / min) is read from the cutting condition file 32, and the processing diameter (mm) is read from the processing hole information memory area 31a in the initial information file 31.

The gear ratio limit value setting section 26 is stored in the gear ratio limit information file 34 based on the size of the target gear head stored in the allocation information file 33 and the number of machining axes allocated thereto. The gear ratio limit value is determined with reference to the gear ratio limit information. That is, data obtained from past design results is accessed using the above information, and matching information is searched.
The gear ratio limit value represents a structural constraint condition of the gear head, and is composed of a minimum value and a maximum value. Further, the obtained gear ratio limit value is stored in the gear ratio limit information file 34 as gear ratio limit information in association with the size of the gear head and the number of processing axes to be allocated,
It is also stored in the assignment information file 33.

As described above, the gear ratio limit value represents the structural constraint of the gear head, for the following reason. The region where the idle shaft can be arranged is determined from the structural constraints of the gear head. In other words, the shaft arrangable area of the idle shaft is obtained from the size of the gear head and the number of processing shafts to be arranged (the weight is determined by the size). Then, from the positional relationship between the machining axis and the motor axis,
The condition of the idle shaft that can be inserted between them is determined. The condition of the idle shaft is the number of idle shafts that can be inserted and the size of a gear attached to the idle shaft. By changing the size of the latter gear, the rotation difference between the machining shaft and the motor shaft, that is, the gear ratio can be changed. Therefore, among the combinations of the conditions of the idle shaft (for example, using one idle shaft to make the gear larger, or using two idle shafts and making the gear smaller), the gear ratio that maximizes the gear ratio is determined. If the minimum one is selected and set as the gear ratio limit value, this reflects the structural constraint of the gear head (see FIG. 10).

The shift processing determining section 27 refers to the assignment information file 33 to determine whether or not shift processing has been set for the target gear head. Specifically, by referring to the assignment information file 33, it is determined whether or not a machining axis has already been set for the target gear head. If there is a machining axis, the machining axis currently assigned is regarded as having a shift setting. As described later, when a shift setting is made, a special process is performed in consideration of the shift setting.

The motor shaft speed setting section 28 calculates the motor shaft speed in the machining axis group. Calculation of the motor shaft rotation speed is performed in the already set steps (machining axis group).
And the machining axis group to be currently assigned. In this case, the spindle speed information and the gear ratio limit value information stored in the assignment information file 33 are given. In addition, a function is provided for correcting the motor shaft speed set in another step when a shift processing setting is present. Detailed processing contents will be described later.

The cutting condition correcting section 29 corrects the cutting condition of a specific machining axis when the motor shaft rotation speed cannot be set. In other words, when the spindle rotation speed of the processing axis to be allocated cannot be realized from the gear ratio limit value, that is, when the spindle rotation speed difference between the target processing axes is large and the motor shaft rotation speed cannot be set, a specific This is for correcting the cutting condition of the machining axis. The correction is
It is performed within the range of cutting conditions (minimum value and maximum value). If the correction cannot be made within this range, an assignment cancel instruction is output assuming that the machining axis assignment instruction is not appropriate, and the operator is prompted to change the assignment instruction. Information necessary for this correction is provided from the motor shaft rotation speed setting unit 28 and the like. Detailed processing contents will be described later.

The output processing unit 30 outputs the processing results of the units 20 to 29 and the data stored in the files 31 to 34 and outputs them to the external display 10, printer 17, plotter 16 and the like.

The cutting condition setting means is a cutting condition setting section 21, the machining axis allocating means is an assignment setting section 22, the spindle speed calculating means is a spindle speed calculating section 25, a gear ratio limit value setting means and a gear ratio limit value. The changing unit is a gear ratio limit value setting unit 26, the motor shaft rotation speed setting unit and the motor shaft rotation speed correction unit are the motor shaft rotation speed setting unit 28, the cutting condition correction unit is a cutting condition correction unit 29, and the shift processing determination unit is shift. Each of the processing determination sections 27 is configured.

Next, the operation of the present apparatus will be described with reference to FIGS. 5 and 6 are flowcharts showing the operation of the present apparatus. First, prior to any processing, initial information serving as a basis for assignment work is defined. That is, the initial information input unit 20 performs input processing of data from the input device 12 or another CAD system by an operator, defines a machining hole and a machining axis, and converts the data into data (S1). The defined initial information (machining hole information, machining axis information) is stored in a predetermined memory area of the initial information file 31. In addition,
To use the data that has already been set, use S1
Can be omitted.

Then, the cutting condition setting section 21 determines the cutting condition based on the input data from the input device 12 by the operator.
Cutting conditions (cutting speed (m / min) and feed rate (mm /
rev)) and a range of cutting conditions (minimum and maximum values of cutting speed and feed amount) are set (S2). The set data is stored in the cutting condition file 32.

Then, the assignment setting section 22 assigns a machining axis to the target gear head in accordance with an assignment instruction from the input device 12 by the operator (see FIG. 4).
3). This assignment result is stored in the assignment information file 33. In addition, the number of assigned machining axes is automatically counted, and the result is stored in the assignment information file 33 together with information on the size of the target gear head input via the input device 12 by the operator at that time. .

When the machining axis is assigned to the target gear head, the cutting condition correcting section 23 automatically changes the feed speed (mm / mi).
After modifying the cutting conditions so that n) is adjusted to the minimum value, calculate the cutting power of each machining axis, re-correct the cutting conditions so that the total value of these cutting powers falls within the allowable value, and perform machining. The time verification unit 24 automatically calculates the total machining time of the machine by integrating the machining time required for each gear head allocated to the machine, and the total machining time falls within a preset possible machining time. The machining time is reduced by changing the tool material as described above (S4). The corrected cutting conditions are stored in the cutting condition file 32.

Then, the spindle rotational speed calculating section 25
Is the spindle rotation speed of the machining axis that has been
The calculation is performed using the above-described predetermined formula (S5). The calculation result is stored in the assignment information file 33 for each machining axis.

Then, the gear ratio limit value setting section 26 stores the gear ratio limit information file 34 based on the size of the target gear head stored in the allocation information file 33 and the number of machining axes allocated thereto. The limit values (minimum value and maximum value) of the gear ratio are obtained with reference to the gear ratio limit information (S6). The set gear ratio limit value is stored in the assignment information file 33 and the gear ratio limit information file 3.
4 is stored.

Then, the shift processing determining unit 27 refers to the assignment information file 33 and determines whether or not shift processing has been set for the target gear head. That is,
While referring to the assignment information file 33, it is first determined whether or not a processing axis has already been set for the target gear head. Determine if you want to. If there is a machining axis with a step number, it is determined that shift machining is set (S7). If there is no shift processing setting, the process proceeds to S13.

On the other hand, if it is determined in S7 that shift processing has been set, the gear ratio limit value setting unit 26 sets the step (machining axis group) already set on the basis of the current number of allocated axes. The limit value of the gear ratio is changed (S8).
The changed gear ratio limit value is stored in the assignment information file 33. The process of S8 is performed because the gear ratio limit value is determined from the size of the target gear head and the number of axes to be allocated as described above. It will be added. When the gear ratio limit value is changed in this manner, the set step is checked for the condition relating to the motor shaft rotation speed based on the gear ratio limit value before the change. In order to determine, it is necessary to recalculate the motor shaft rotation speed for the set step based on the changed gear ratio limit value that matches the current situation.

S9 is a process for executing this. That is, based on the spindle speed information calculated in S5 and the gear ratio limit value reset in S8, the motor shaft speed setting unit 28 performs the motor The shaft rotation speed is recalculated (S9).

FIG. 7 shows S9 of FIG. 5 (and S13 of FIG. 6).
It is a flowchart of a process of. In S9 and S13,
Since only the machining axis group to be calculated is different (in step S9, the already set steps (machining axis group), and in step S13, the machining axis group that is currently assigned), it is assumed here that they are common to both. explain.

The outline of the motor shaft rotation speed setting processing in S9 and S13 is as follows. Among the target processing shafts, the gear ratio of the processing shaft having the maximum spindle rotation speed is 1.0 or cannot be satisfied. In this case, the number of rotations of the motor shaft is set so as to minimize the number of processing axes at which the gear ratio increases (greater than 1.0). If the number of rotations of the motor shaft cannot be determined, all the processing axes whose cutting conditions are to be corrected (this is called a cutting condition correction candidate processing axis) are selected.

First, the target machining axes are sorted (rearranged) in descending order (S21). In this embodiment, the target processing axes are arranged in order from the one with the largest spindle rotation speed. Then, the allowable motor shaft rotation speed is calculated for each target processing axis (S22). The allowable motor shaft rotation speed is composed of a minimum value (min) and a maximum value (max), and is obtained by multiplying the spindle rotation speed by the gear ratio limit value. That is,
It is obtained by the following equation. Permissible motor shaft rotation speed min = spindle rotation speed × gear ratio limit value minimum value Permissible motor shaft rotation speed max = spindle rotation speed × gear ratio limit value maximum value A certain machining axis is selected, and its spindle speed x is determined (S23). Then, it is determined whether or not the x value obtained in S23 is within the range of the permissible motor shaft rotation speed of another processing axis (S24), and the x value is within the range of the permissible motor shaft rotation speed of another processing axis. If the value is within the range, the x value is set as the motor shaft rotation speed of the target machining axis group (S2
5).

On the other hand, if it is determined in S24 that the x value does not fall within the range of the allowable motor shaft rotation speed of the other processing axes, the allowable motor shaft rotation speed ma is selected from the target processing shaft group.
The minimum value a of x is selected (S26), and the maximum value b of the allowable motor shaft rotation speed min is selected (S27). Then, it is determined whether or not the a value obtained in S26 is equal to or more than the b value obtained in S27 (a ≧ b) (S28). If the a value is equal to or more than the b value, the a value is set to the target machining axis. The number of rotations of the motor shaft of the group is set (S29).

On the other hand, if the value a is not equal to or more than the value b in the determination of S28, it is determined that the motor shaft rotation speed cannot be set as it is, and the spindle is selected to select a cutting condition correction candidate machining axis. An allowable motor shaft rotation speed min value c of the processing axis having the maximum number of rotations (selected in S23) is selected (S30), and the processing axis and the number of processing axes whose c values fall within the allowable motor shaft rotation speed range. d is obtained (S31), and an allowable motor shaft rotation speed max value e of the processing axis having the minimum spindle rotation is selected from the target processing shaft group (S32), and is set within the range of the allowable motor shaft rotation speed. A machining axis in which the e value is entered and the number f of machining axes are obtained (S33). And
By comparing the d value obtained in S31 with the f value obtained in S33, all the processing axes that do not belong to the larger one are selected, and these are output as cutting condition correction candidate processing axes together with auxiliary correction information (S34). Here, the auxiliary correction information includes an allowable motor shaft rotation speed min of the processing axis having the smallest spindle rotation speed among the processing axes belonging to the larger one of the d value and the f value;
The maximum motor shaft rotation speed max of the machining axis having the maximum spindle rotation speed is configured. Also, in this case, the motor shaft rotation speed is undefined.

The above will be described using a specific example. FIG.
FIG. 4A shows the specifications of one machining axis A to D, and FIG. 4A is a table format, and FIG. 4B is a graph format. This data is S21 and S22
Obtained by Here, the gear ratio limit value is set to 0.8 to
It is calculated as 1.2.

First, the case where the target machining axes are A and B will be described. In this case, the machining axis having the maximum spindle rotation speed is A, and its value is x = 3000 (rpm) (S23). This x value is within the range of the allowable motor shaft rotation speed of the machining axis B (S24). Therefore, the motor shaft rotation speed becomes 3000 (rpm) (S25).

Next, the case where the target machining axes are A, B, and C will be described. In this case, the machining axis having the maximum spindle rotation speed is A, and its value is x = 3000 (rpm).
(S23). This x value is within the range of the permissible motor shaft rotation speed of the processing axis B, but not within the range of the permissible motor shaft rotation speed of the processing axis C (S24). Then, the process proceeds to S26, and the machining axis having the minimum value of the allowable motor shaft rotation speed max is C, and the value is a = 2400 (rpm) (S26). The machining axis having the maximum value of the permissible motor shaft rotation speed min is A, and the value is b = 2400 (rp
m) (S27). Accordingly, since the condition of a value ≧ b value is satisfied (S28), the motor shaft rotation speed is 2400 (r
pm) (S29).

Further, the case where the target machining axes are A, B, C, and D will be described. In this case, the machining axis having the maximum spindle rotation speed is A, and its value is x = 3000.
(rpm) (S23). This x value is within the range of the allowable motor shaft rotation speed of the processing axis B, but not within the range of the allowable motor shaft rotation speed of the processing axes C and D (S24). Therefore,
Proceeding to S26, the machining axis having the minimum value of the permissible motor shaft rotational speed max is D, and its value is a = 1800 (r
pm) (S26). Also, the allowable motor shaft rotation speed mi
The machining axis with the maximum value of n is A, whose value is b = 2
400 (rpm) (S27). Therefore, a value ≧ b
Since the value condition is not satisfied (S28), the process further proceeds to S30. The machining axis with the highest spindle speed is A
And the permissible motor shaft rotation speed min value of this shaft is c = 2
400 (rpm) (S30). The machining axes whose c values fall within the range of the allowable motor shaft rotation speed are A, B, and C, and the number of machining axes is d = 3 (S31). The machining axis with the minimum spindle rotation speed is C,
The allowable motor shaft rotation speed max value of this shaft is e = 1800 (r
pm) (S32). The machining axes whose e-values fall within the range of the permissible motor shaft rotation number are D and C, and the number of machining axes is f = 2 (S33). Therefore, d
When the value and the f value are compared, the d value is larger and the machining axis that does not belong to the larger value is D, so the cutting condition correction candidate is the machining axis D. In addition, the correction auxiliary information includes the allowable motor shaft rotation speed min value (1) of the processing axis C having the smallest spindle rotation speed among the processing axes A, B, and C belonging to the larger one.
600 (rpm)) and the allowable motor shaft rotation speed max value (3600 (rpm)) of the processing axis A having the maximum spindle rotation speed.
(S34). In this case, the motor shaft speed is undefined.

When the processing of S9 is completed, it is confirmed whether or not there is a cutting condition correction candidate machining axis outputted by the motor shaft revolution number setting section 28, and it is determined whether or not the motor shaft revolution number has been set (step S9). S10). If the motor shaft speed has been set, the process proceeds to S13.

On the other hand, if the motor shaft speed cannot be set in S10, the cutting condition correction unit 29
Is based on the cutting condition correction candidate machining axis and the correction auxiliary information output from the motor shaft rotation speed setting unit 28, and the gear ratio limit value stored in the assignment information file 33. Then, the cutting conditions are corrected to determine whether the cutting conditions can be corrected (S11).

The correction method is as follows. First, when the spindle rotation speed of the cutting condition correction candidate processing axis is smaller than the allowable motor shaft rotation speed min value (hereinafter referred to as MIN) as correction auxiliary information, cutting speed (m / min) = processing diameter ( mm) ・ π ・ MIN / (100
0 x gear ratio limit value maximum value) Also, the spindle rotation speed of the cutting condition correction candidate machining axis is
When the value is larger than the allowable motor shaft rotation speed max value (this is referred to as MAX), which is the correction auxiliary information, the cutting speed (m / min) = the processing diameter (mm) · π · MAX / (100
(0 × minimum value of gear ratio limit value) to calculate the respective cutting speeds. If the calculated cutting speed is within the range (minimum value and maximum value) of the cutting condition of the cutting condition correction candidate machining axis, it is determined that the cutting condition can be corrected for the machining axis. Then, such processing is performed for all of the cutting condition correction candidate machining axes, and if at least one of the processing axes cannot be corrected, it is determined that the correction of the cutting conditions as a whole is impossible.

If it is possible to correct all of the candidate machining axes for cutting condition correction in the process of S11, the calculated correction value of the cutting condition is stored in the cutting condition file 32 for each machining axis (S12), and the process proceeds to S13. move on.

On the other hand, if at least one correction cannot be made in the processing of S11, the cutting condition correction unit 2 of this embodiment
No. 9 outputs an assignment cancel instruction to cancel the machining axis assignment instruction (S17), and prompts the operator to change the assignment instruction. The assignment cancellation command may be output from the control unit (not shown) instead of the cutting condition correction unit 29.

In S13, the same processing as in S9 is performed.
This is executed for the machining axis group that is currently assigned. Here, the motor shaft rotation speed is calculated using the gear ratio limit value set in S6. In S14, in response to the result of S13, the same processing as S10 is performed on the machining axis group to be assigned. Here, if the motor shaft speed can be set, the process proceeds to S19.
Proceeding to step S15 for the machining axis group
The same processing as in step 11 is performed. If it is determined in S15 that the cutting conditions can be corrected, a process of storing the correction values is performed as in S12 (S16), and S19.
However, if it is determined that the cutting conditions cannot be corrected, the process proceeds to S17, where an assignment cancel command is output.

After the assignment cancel command is output in S17, if the assignment command is changed by the operator via the input device 12 (S18), the process returns to S3.
The operation after S3 is repeated, but if not, the process ends.

When the motor shaft rotation speed can be set for the machining axis group to be assigned, or when the cutting conditions can be corrected even if the motor shaft rotation speed cannot be set, the motor shaft rotation speed is set. The setting unit 28 has been set to another step based on the determined gear ratio, on condition that there is shift setting processing and that the processing axis to be allocated is also used in another step (S19). The number of rotations of the motor shaft is corrected (S20), and a series of processing ends. For example, it is assumed that the first step is set as shown in FIG. 9A (the rotation speed of the motor shaft is 3000 (rpm)), and the second step is set as shown in FIG. 9B. In this case, the motor shaft rotation speed in the second step is 2340 (rpm) (see the flowchart of FIG. 7), and the gear ratio of the machining axis B is 0.78 (= 2340 (rpm)) 3000 (rpm)). Become. Therefore, in order to establish the first step, the motor shaft rotation speed in the first step is set to 2340 (rpm) (= 3000 (r
pm) × 0.78).

Therefore, according to the present embodiment, when performing the work of allocating the machining axis on the CAD system, the gear head structural constraint is cleared by using the gear ratio limit value, and each machining axis is cleared. The cutting conditions are corrected in consideration of the motor shaft rotation speed and the gear ratio limit value, so the assignment of machining axes is optimized in consideration of the constraints on the gearhead design and the cutting conditions for each machining axis. Can be Therefore, the accuracy of the machining axis assignment result is improved. Furthermore, since the machining axes are assigned in consideration of the constraints on the design of the gear head, the number of man-hours for studying the gearing in designing the gear head and the man-hour for designing the gear head can be reduced.

Further, in this embodiment, the machining axis is assigned in consideration of the shift machining. Therefore, when the shift machining is set, the accuracy of the machining axis assignment result when the shift machining is set, the number of study steps is reduced, and Design man-hours can be reduced.

Second Embodiment FIG. 11 is a functional block diagram according to a second embodiment of the apparatus shown in FIG. Note that parts common to those in FIG. 2 are denoted by the same reference numerals.

In this embodiment, the above apparatus has a function of assigning a machining axis to a gear head in consideration of another constraint condition (bearing arrangement position) on the gear head design, as shown in FIG. As in the case of the first embodiment, an initial information input unit 20 for inputting initial information (machining hole information, machining axis information, etc.), an initial information file 31 for storing the input initial information, In addition to having an assignment setting section 22 to be assigned and an assignment information file 33 for storing the set machining axis assignment information, a machining axis combination setting section 60 for setting a combination of machining axes and a verification of whether or not bearing position correction is possible. A bearing position correction availability verification unit 61, a screen state creation unit 62 for creating a screen state to be displayed on the display 10, and a function for deleting information on a designated machining axis. A shaft deletion processing section 63, a correction point information creation unit 64 for creating a correction point information, the correction candidate selection unit selects a candidate of the bearing position correction 65
And a correction amount calculator 6 for calculating a correction amount of the bearing position
6, a spindle protrusion amount correcting unit 67 for correcting the spindle protrusion amount, a processing axis combination information file 68 for storing processing axis combination information, and a hole position tolerance condition file 69 for storing a preset hole position tolerance condition. A processing part surface roughness condition file 70 for storing preset processing part surface roughness conditions, a processing surface state condition file 71 for storing processing surface state conditions at preset processing positions, and correction point information. A correction point information file 72 to be stored is provided. These are internally connected to each other via an input / output interface 35 as in the case of the first embodiment shown in FIG.
2) and output devices (display 10, printer 1)
7, plotter 16 etc.).

The processing axis verification means is a processing axis combination setting section 60, a bearing position correction propriety verification section 61 and a processing axis combination information file 68, the screen display creation means is a screen state creation section 62, and the processing axis deletion means is processing. Axis deletion processing unit 63,
The bearing position correcting means includes a correction point information creating unit 64.
, A correction candidate selection unit 65, a correction amount calculation unit 66, and various condition files 69 to 71.

The machining axis combination setting section 60 sets a combination of machining axes for which bearing position correction needs to be performed. Specifically, for example, the assignment information (including the number of assigned machining axes) set in accordance with the machining axis assignment instruction from the operator is read from the file 33, and the machining assigned to the designated turret (in the case of a turret machine) is performed. Determine the axis combination. The number of combinations at this time is mathematically given by nC2, where n is the number of machining axes assigned to the designated turret. Then, the inter-axis pitch is verified for each combination (α-axis and β-axis), and machining axis combination candidates requiring bearing position correction are extracted. Here, the verification of the inter-axis pitch is performed by comparing the minimum value of the inter-axis pitch (or the minimum inter-axis pitch) with the measured value of the inter-axis pitch. If the measured value of the inter-axis pitch is equal to or larger than the minimum value of the inter-axis pitch, it is not necessary to perform the bearing position correction, and the combination is excluded from the processing target. The minimum value of the inter-axis pitch and the measured value of the inter-axis pitch are obtained by the following equations. Minimum inter-axis pitch = α-axis bearing radius + β-axis bearing radius + allowable radial thickness Thickness measured between axes = ピ ッ チ (α-axis X coordinate-β-axis X coordinate) ² +
(Α-axis Y-coordinate-β-axis Y-coordinate) ² ｝ ^1/2 Various information such as the bearing radius, radial thickness tolerance, and machining axis position (X-coordinate and Y-coordinate) used in these equations are initial information. Memory area 31b for machining axis information in file 31
Read from. The processing result of the processing axis combination setting unit 60 is stored in the processing axis combination information file 68. For example, in the assignment state of machining axes (A axis to G axis) shown in FIG. 12, machining axis combination candidates to be extracted are BC,
There are four sets of CD, DE, and FG (the number of axis combination information = 4).

The bearing position correction propriety verification section 61 performs verification of the bearing position correction propriety of the machining axis combination candidates extracted by the processing axis combination setting section 60. Specifically, referring to FIG. 13, first, assuming that the bearing position of one α-axis is corrected, the actual thickness measurement values p and q are respectively calculated by the following equations. Thickness actual measurement value p = inter-axis pitch actual measurement value Ps− (α-axis bearing radius r1 + β-axis N value / 2) Thickness actual measurement value q = inter-axis pitch actual measurement value Ps− (β-axis bearing radius r2 + α-axis M value / 2) Here, the measured pitch Ps between axes is the machining axis combination setting unit 6
The values already calculated at 0 are used, and the bearing radii r1 and r2 and the M and N values of each axis are read from the memory area 31b of the machining axis information in the initial information file 31. If the measured actual thickness values p and q are both equal to or greater than a predetermined allowable thickness value (in the radial direction), it is determined that the α-axis bearing position can be corrected, and the information as the bearing position correction availability information is determined. The correction information flag is set to “1”. The meaning of the correction information flag will be described later. On the other hand, if at least one of the obtained actual thickness values p and q is less than the allowable thickness value (radial direction), it is determined that the α-axis bearing position cannot be corrected, and the correction information flag is set. Is set to “0”. Next, the same processing as described above is performed, assuming that the bearing position of the other β axis is corrected.
The processing result of the bearing position correction availability verification unit 61 is stored in the machining axis combination information file 68.

The machining axis combination information file 68 includes the result of the machining axis combination setting section 60 (candidate machining axis combination) and the result of the bearing position correction availability verification section 61 (correction information flag).
Based on the above, for example, machining axis combination information in a format as shown in FIG. 14 is created and stored. here,
The meaning of the correction information flag is as follows. When the combination of the values of the correction information flags for the α-axis and the β-axis is (0, 0), assignment is impossible because the pitch between axes is too small. The assignment is possible by correcting the bearing position, in the case of (0, 1), the assignment is possible by correcting the bearing position of the β axis, and in the case of (1, 1), the α axis or The assignment is possible by correcting the bearing position of the β axis.

The screen state creating unit 62 updates the screen state displayed on the display 10 with reference to the processing axis combination information. For example, as shown in FIG. 15, the center positions of the bearing outer diameters are connected by a line to the machining axis combination candidate (this line is referred to as an axis center line). At this time, if the assignment is not possible, the connection is made by a solid line, and if the assignment is made possible by performing the bearing position correction, the connection is made by a dotted line. This is convenient for an operator who instructs cancellation of the machining axis assignment.

The method of reflecting the processing axis combination information on the screen display state is not limited to the above-described embodiment. For example, as a method of reflecting the correction information flag, another line type may be used, or the line width may be changed. As a method of displaying a machining axis combination candidate, a line of the bearing outer diameter may be used. The seed and the line width may be changed. In the case of a color display, the color may be changed.

The machining axis deletion processing section 63 deletes information on the designated machining axis. Specifically, the bearing outer diameter shape, axis center line, and machining axis combination information of the designated machining axis are deleted, and the number of pieces of axis combination information is updated (decreased). The designation of the machining axis to be deleted is performed by the operator with reference to the screen state created by the screen state creating unit 62. For example, in the example of FIG. 15, when the operator instructs to delete the E axis, the display 10
The bearing outer diameter shape of the E-axis, the axis center line between the D-axis and the E-axis are deleted from the screen display, the machining axis combination candidate including the E-axis is deleted from the machining axis combination information file 68, Are updated to three sets. Further, the machining axis deletion processing unit 63 checks whether there is no machining axis combination candidate that cannot be assigned on the designated turret while referring to the machining axis combination information (especially the correction information flag) in the file 68. It also has functions. In the present embodiment, as will be described later, when there is a machining axis combination candidate that cannot be assigned, the next processing is not allowed to proceed.

The correction point information creating unit 64 processes various condition files 69 to 71 (hole position tolerance condition, processing part surface roughness condition, processing position processing position) for the processing axis stored in the processing axis combination information. With reference to the (surface condition), information (correction point information) that points to the adverse effect that occurs when the bearing position is corrected is created and stored in the dedicated file 72. The storage format of the correction point information is, for example, as shown in FIG.

FIGS. 17 to 19 are tables showing examples of hole position tolerance conditions, processing portion surface roughness conditions, and processing surface state conditions at processing positions, respectively. As shown in these figures, various condition files are pointed using the distance L between the tool tip and the bearing position, the tool diameter, and the spindle diameter as keys. The processing surface condition at the processing position includes an angle X between the processing direction and the processing surface 80, and a surface roughness Rmax of the processing surface 80 (FIG. 19A, respectively).
(B)). The surface roughness of the processed portion in FIG. 18 is the surface roughness Rmax of the processed portion (for example, the processed hole 81) (see FIG. 20). The points of the various condition files are set to appropriate values in advance by evaluating the adverse effect when the bearing position is corrected by experiments or the like.

The specific calculation method of the points is as follows. For each machining axis stored in the machining axis combination information file 68, the hole position tolerance T, the surface roughness Rmax of the machining hole 81, the machining direction and the machining from the machining hole information memory area 31a in the initial information file 31. The angle X with respect to the surface 80 and the surface roughness Rmax of the processing surface 80 are read, and the distance L between the tool tip and the bearing position, the tool diameter, and the spindle diameter are respectively determined from the memory area 31b of the processing axis information in the initial information file 31. Based on these data, the corresponding points are extracted with reference to the various condition files 69 to 71, and the total value of the points extracted from each file is obtained. The angle X between the machining direction and the machining surface 80 may be calculated each time based on the machining direction data and the position data of the machining surface 80, or the distance between the tool tip and the bearing position. L may be obtained by adding the tool protrusion amount, the holder length, and the spindle protrusion amount each time.

The correction candidate selection unit 65 selects a candidate for bearing position correction based on the machining axis combination information and the correction point information. Specifically, first, a group of machining axes to be subjected to bearing position correction is extracted with reference to machining axis combination information stored in the file 68. The group is extracted by setting all machining axes belonging to a machining axis combination candidate including a common machining axis with another machining axis combination candidate as the same group, and machining axes belonging to independent machining axis combination candidates not including the common machining axis. Is performed as a separate group. For example, taking the case of FIG. 14 as an example, assuming that the E-axis has been deleted by the operator, the extracted groups are as shown in FIG.

Next, for each of the extracted groups, a machining axis is selected in order, and whether or not correction is possible is verified with reference to the machining axis combination information. The contents of the verification are as follows.
Here, the example of FIG. 21 will be described. First, group 1 is verified. First, it is assumed that the bearing position of the B axis is corrected. Referring to the machining axis combination information, the B axis can be corrected (correction information flag = 1). B
When the axis is corrected, the adjacent C axis cannot necessarily be corrected. Therefore, the D axis is the correction candidate in the combination candidate CD. D axis can be corrected (correction information flag = 1)
Therefore, the B-axis bearing position correction is established. Therefore, the point total point is calculated with reference to the correction point information. In this case, since the bearing position is corrected for the B axis and the D axis (correction pattern), the total point is 10 + 8 = 18 (see FIG. 16). Next, C
Assume that the shaft bearing position is corrected. Referring to the machining axis combination information, the C axis cannot be corrected in the BC candidate combination (correction information flag = 0), so that the bearing position correction of the C axis is not established. Next, it is assumed that the D-axis bearing position is corrected. When the same processing as described above is performed, the pattern becomes the same as the B-axis bearing position correction pattern. That is, a candidate pattern based on the assumption that the bearing position of the D axis is corrected is not selected. Therefore, for Group 1, one pattern (B-axis and D-axis) is eventually selected as a bearing position correction candidate. Next, the same processing as described above is performed for group 2. In this case, one pattern (G axis) is used as a bearing position correction candidate.
Is selected.

In the above example, the number of candidates is one for each of group 1 and group 2. Therefore, there is no opportunity to use the calculation result of the point total point. In such a case, the point total points are compared, and the candidate (pattern) having the minimum value is selected.

That is, the processing based on the number of candidates obtained as a result of the above verification is as follows. First, the number of candidates is 0
If so, for each group, the operator is informed of which machining axis should be deleted to achieve the machining axis combination. When the number of candidates is one as in the above example, the processing is continued for the selected candidate. If the number of candidates is two or more,
The total points are compared, the candidate having the minimum value is selected, and the process is continued. When there are two or more patterns having the minimum point total point, for example, the operator arbitrarily selects a candidate (pattern) and continues the processing. By performing such a process, it is possible to automatically select a pattern for minimizing the adverse effect of performing the bearing position correction when processing the product.

The correction amount calculating section 66 includes a correction candidate selecting section 65
The correction amount of the bearing position is calculated with respect to the candidate selected in (1). The correction amount is calculated by the following equation. Correction amount = Bearing size + Allowable thickness in lateral direction Here, the bearing size is the length in the lateral direction of the bearing of the machining axis adjacent to the machining axis to be corrected, and the allowable thickness in the lateral direction is For example, the allowable thickness w in FIG.
It is. Each piece of information of the bearing size and the lateral thickness allowable value used in the above equation is read from the memory area 31b of the processing axis information in the initial information file 31.

The spindle protrusion amount correction unit 67 corrects the spindle protrusion amount by adding the bearing position correction amount obtained by the correction amount calculation unit 66 to the spindle protrusion amount. That is, the spindle protrusion amount is corrected by the following formula, and the spindle protrusion amount = spindle protrusion amount + bearing position correction amount The value of the spindle protrusion amount in the machining axis information memory area 31b of the initial information file 31 is updated. Since the spindle protrusion amount J is one of the tooling layout diagram creation parameters together with the tool protrusion amount I and the like, the contents of the bearing position correction during the tooling layout diagram creation (realized by the parametric graphic function) by the above-described processing. Feedback is automatically provided (see FIG. 22).

Next, the operation of the present apparatus will be described with reference to FIG. FIG. 23 is a flowchart showing the operation of the present apparatus. Here, various kinds of initial information (machining hole information, machining axis information, etc.) have already been set by the operator via the initial information input unit 20 and stored in the file 31, and machining axis assignment information (assigned information) has already been set. (Including the number of machining axes that have been set) are set via the assignment setting unit 22 and stored in the file 33, for example, according to a machining axis assignment instruction from the operator.

First, when the system is started, the machining axis combination setting section 60 reads machining axis assignment information from the file 33 (S40), and executes machining assigned to a designated gear head, for example, a designated turret (in the case of a turret machine). An axis combination is determined (S41). The number of combinations at this time is mathematically given by nC2, where n is the number of machining axes assigned to the turret, as described above.

Then, the machining axis combination setting section 60 sets S
The inter-axis pitch is verified for each combination (α axis and β axis) obtained in 41, and machining axis combination candidates requiring bearing position correction are extracted (S42). That is, as described above, the bearing radius and the machining axis position (X coordinate and Y coordinate) of the machining axis to be examined (α axis and β axis) and the radial thickness are stored in the machining axis information memory area 31b in the initial information file 31. After reading the thickness tolerance, substituting this information into a predetermined formula to calculate the minimum inter-axis pitch and the actual measured inter-axis pitch, the minimum inter-axis pitch and the measured inter-axis pitch are compared. Combinations for which the measured actual pitch is equal to or greater than the minimum pitch between axes are excluded from processing. For example, taking a machining axis assignment state (A axis to G axis) as shown in FIG. 12 as an example (the same applies hereinafter), machining axis combination candidates to be extracted are B-
There are four sets of C, CD, DE, and FG (the number of axis combination information = 4).

Then, the bearing position correction propriety verifying section 61 verifies the bearing position correction propriety of the machining axis combination candidates extracted in S42. That is, first, it is assumed that the bearing position of one α-axis is corrected, and the bearing radii r1, r2, and M of the machining axes to be verified (α-axis and β-axis) are stored in the memory area 31b of the machining axis information in the initial information file 31. And the N value are read out, and these data and the measured inter-axis pitch value Ps previously calculated in S42 are substituted into a predetermined formula to determine the actually measured thickness values p and q, respectively (see FIG. 13). Measured wall thickness p and q
Are greater than or equal to a predetermined thickness allowable value (in the radial direction), it is determined that the α-axis bearing position can be corrected, and the correction information flag as the bearing position correction availability information is set to “1”.
On the other hand, if at least one of the obtained actual thickness values p and q is less than the allowable thickness value (radial direction), α
It is determined that the shaft bearing position cannot be corrected, and the correction information flag is set to “0”. Next, the same processing as described above is performed, assuming that the bearing position of the other β axis is corrected. Then, machining axis combination information file 6
Reference numeral 8 denotes machining axis combination information (see FIG. 14) based on the result (correction information flag) of the bearing position correction propriety verification unit 61 and the result of S42 (machining axis combination candidate).
Is created and stored in the dedicated file 68 (S4)
3).

Then, the screen state creation unit 62 proceeds to S43
The screen state displayed on the display 10 is updated with reference to the processing axis combination information (combination candidate, correction information flag) created in step (S44). For example, as shown in FIG. 15, for each combination candidate, if the assignment is not possible, a solid line between the shaft centers is drawn. pull.

Then, the processing axis deletion processing section 63 processes the processing axis combination information (in particular, the correction information flag) in the file 68.
It is determined whether there is a machining axis combination candidate that cannot be assigned on the designated turret, in other words, whether there is a machining axis to be deleted on the designated turret (S45). If there is, the operator proceeds to S44
Waiting for the designation of the machining axis to be deleted with reference to the screen state created in step (S46), the bearing outer diameter shape and the axis center line (solid line) of the designated machining axis are deleted from the screen display ( S47) and machining axis combination information file 6
8, the machining axis combination candidate including the machining axis is deleted, and the contents of the machining axis combination information are updated (S48), and the process returns to S45. That is, the processes of S46 to S48 are repeated until there are no machining axis combination candidates that cannot be assigned on the designated turret, and the process does not proceed to the next S49 until there are no machining axis combination candidates that cannot be assigned. ing. For example, in the example of FIG. 15, the E-axis is deleted according to the instruction of the operator.

If the determination result in S45 is NO, that is, if there are no machining axis combination candidates that cannot be assigned on the designated turret, the correction point information creating unit 64
With respect to the machining axis stored in the machining axis combination information, the correction point information is referred to by referring to various condition files 69 to 71 (hole position tolerance condition, machining surface roughness condition, machining surface condition of machining position). (See FIG. 16) and store it in a dedicated file 72 (S49). That is, as described above, for each machining axis stored in the machining axis combination information file 68, the hole position tolerance T and the surface roughness of the machined hole 81 are obtained from the memory area 31a of the machined hole information in the initial information file 31. Read the degree Rmax, the angle X between the processing direction and the processing surface 80, and the surface roughness Rmax of the processing surface 80,
Similarly, the distance L between the tool tip and the bearing position, the tool diameter, and the spindle diameter are read from the processing axis information memory area 31b in the initial information file 31 (see FIG. 2).
0), based on these data, referring to various condition files 69 to 71, extracting corresponding points, and calculating the total value of the points extracted from each file,
Save as correction point information.

Then, the correction candidate selecting section 65 refers to the processing axis combination information stored in the file 68 and extracts a group of processing axes to be subjected to bearing position correction (see FIG. 21) (see FIG. 21). S50) After that, for each extracted group, the machining axis is selected in order and the file 6
With reference to the machining axis combination information in 8 and the correction point information in the file 72, the propriety of the correction is verified according to the above-described predetermined logic, and a candidate for the bearing position correction is selected (S51). For example, in the above example, the B axis and D
The axis is selected, and the G axis is selected from group 2. At this time, if the number of candidates obtained as a result of the verification is 0, or if the number of candidates is two or more and there are two or more patterns having the minimum point total points, the operator selects This is as described above.

Then, for the candidate selected in S51, the correction amount calculation unit 66 determines the bearing size of the adjacent machining axis and the allowable lateral thickness in the lateral direction from the memory area 31b of the machining axis information in the initial information file 31. Is read, and these pieces of information are substituted into a predetermined equation to calculate a bearing position correction amount (S52).

Then, the spindle protrusion amount correcting section 67
2 corrects the spindle protrusion amount by adding the bearing position correction amount obtained in S52 to the spindle protrusion amount (FIG. 2).
2), and updates the value of the spindle protrusion amount in the machining axis information memory area 31b of the initial information file 31 (S5).
3).

Therefore, according to the present embodiment, information on the outer diameter of the bearing, the allowable thickness of the bearing, and the like is held for inspecting the positional relationship of the machining axis, and it is determined whether or not the bearing position can be corrected based on the information. I decided to
When allocating machining axes on the CAD system, it is automatically determined whether the bearing position can be corrected due to the gearhead structure in consideration of the gearhead design constraints (bearing arrangement position). , Machining axis assignment information includes gearhead design know-how,
Stronger coordination between the examination result and the actual design content can be achieved.

In this embodiment, the machining axis for which the bearing position correction is to be performed is automatically selected. At this time, various condition files (hole position tolerance condition, machining part surface roughness condition, machining position By referring to the correction point information obtained by referring to (working surface condition), the candidate that minimizes the adverse effect of performing the bearing position correction is selected, so that the bearing position is adjusted in a direction that guarantees the processing accuracy. A machining axis for performing the correction can be selected.

Further, in this embodiment, since the bearing position correction amount is calculated and added to the spindle protrusion amount, the bearing position correction contents can be automatically fed back to the tooling layout diagram.

[0099]

According to the first to fourth aspects of the present invention, the allocation of the machining axes is optimized in consideration of the structural constraints (gear ratio limit value) of the gear head. The accuracy is improved, the number of study steps is reduced, and the number of design steps is reduced.

According to the fifth aspect of the present invention, the assignment of the machining axis is optimized in consideration of the shift machining setting, so that the accuracy of the machining axis assignment result at the time of the shift machining setting can be improved, the number of study steps can be reduced, Also, design man-hours can be reduced.

According to the sixth aspect of the present invention, the assignment of the machining axis is optimized in consideration of the constraint condition (bearing arrangement position) in the gear head design, so that the accuracy of the machining axis assignment result is improved and the number of man-hours to be studied is increased. And the number of design steps are reduced.

According to the seventh aspect of the present invention, in addition to the effect of the sixth aspect of the present invention, whether or not the bearing position can be corrected is automatically determined due to the structure of the gear head. It includes know-how, and enables stronger coordination between the examination result and the actual design content.

According to the eighth and ninth aspects of the present invention, in addition to the effect of the sixth aspect of the present invention, the candidate which minimizes the adverse effect of the bearing position correction is selected, so that the machining accuracy is ensured while ensuring the machining accuracy. Position correction can be performed.

According to the tenth and eleventh aspects of the invention, in addition to the effect of the sixth aspect, the content of the bearing position correction can be automatically fed back to the tooling layout diagram.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of hardware constituting a machining axis assignment information creating device of the present invention.

FIG. 2 is a functional block diagram of a first embodiment of the apparatus shown in FIG. 1;

FIG. 3 is a cross-sectional view showing an example of a processing axis.

FIG. 4 is a schematic view showing an example of assignment of machining axes.

FIG. 5 is a flowchart showing the operation of the present embodiment.

FIG. 6 is a flowchart following FIG. 5;

FIG. 7 is a flowchart for setting the motor shaft rotation speed in FIGS. 5 and 6;

FIG. 8 is a table showing the specifications of the machining axis.

FIG. 9 is a chart showing an example of step processing;

FIG. 10 is a schematic diagram showing another example of assignment of machining axes.

FIG. 11 is a functional block diagram of a second embodiment of the apparatus of FIG. 1;

FIG. 12 is a schematic diagram showing an example of assignment of machining axes.

FIG. 13 is a diagram for explaining verification of whether or not bearing position correction is possible;

FIG. 14 is a diagram showing an example of machining axis combination information.

FIG. 15 is a diagram showing an example of updating a screen display state.

FIG. 16 is a diagram showing an example of correction point information.

FIG. 17 is a table showing an example of a hole position tolerance condition file.

FIG. 18 is a chart showing an example of a processing part surface roughness condition file;

FIG. 19 is a chart showing an example of a processing surface condition file of a processing position;

FIG. 20 is a diagram provided for description of FIGS. 17 to 19;

FIG. 21 is a diagram showing an example of group extraction.

FIG. 22 is a diagram for explaining a spindle protrusion amount correction;

FIG. 23 is a flowchart showing the operation of the present embodiment.

FIG. 24 is a diagram provided for describing a bearing arrangement position.

FIG. 25 is a diagram for explaining a gear head.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Display 12 ... Keyboard 14 ... Computer 15 ... External storage device 16 ... Plotter 17 ... Printer 20 ... Initial information input part 21 ... Cutting condition setting part (cutting condition setting means) 22 ... Assignment setting part (processing axis assignment means) 25 ... Spindle rotation speed calculation unit (spindle rotation speed calculation unit) 26 ... Gear ratio limit value setting unit (Gear ratio limit value setting unit, gear ratio limit value changing unit) 27 ... Shift processing determination unit (Shift processing determination unit) 28 ... Motor shaft rotation speed setting unit (motor shaft rotation speed setting unit, motor shaft rotation speed correction unit) 29: Cutting condition correction unit (cutting condition correction unit) 60: Machining axis combination setting unit (inter-shaft verification unit) 61: Bearing Position correction availability verification section (processing axis verification means) 62 ... screen state generation section (screen display generation means) 63 ... processing axis deletion processing section (processing axis deletion) Step 64: Correction point information creating unit (bearing position correcting unit) 65: Correction candidate selecting unit (bearing position correcting unit) 66: Correction amount calculating unit (bearing position correcting unit) 67: Spindle protrusion amount correcting unit 68: Processing axis Combination information file (processing axis verification means) 69 ... hole position tolerance condition file (bearing position correction means) 70 ... processing part surface roughness condition file (bearing position correction means) 71 ... processing surface state condition file (bearing position correction means) )

Claims (11)

(57) [Claims] 1. A machining axis assignment information creating apparatus for assigning a plurality of machining axes to a gear head on a CAD, based on an input device for inputting predetermined data and an assignment instruction, and an input device for inputting the data. Cutting condition setting means for setting a cutting condition and a range thereof, processing axis allocating means for allocating a processing axis to a gear head in accordance with an allocation instruction input by the input device, and allocation information for allocating a result of the allocation by the processing axis allocating means.
Information file to be stored as the processing axis , and the machining axis assigned by the machining axis allocating means.
The allocation information and the spindle rotation speed calculating means, said allocation information file is stored to calculate the spindle speed and
Of the gear head based on the size of the gear head and the number of machining axes allocated to the gear head
Gear ratio limit value setting means for obtaining a gear ratio limit value as a mechanical constraint, and the spindle rotation speed for each of the assigned machining axes.
Is multiplied by the gear ratio limit value, and based on the multiplication result,
Motor axis of a machining axis group consisting of the assigned machining axes
A motor shaft rotational speed setting means for setting a rotational speed, when the motor shaft rotational speed setting means can not set the number of rotation the motor shaft, on the basis of the multiplication result and said gear ratio limit value, a certain processing axis Select as cutting condition correction candidate machining axis
And a cutting condition correcting means for correcting a cutting condition with respect to the cutting condition correction candidate processing axis . 2. A motor shaft rotational speed setting means comprises means for calculating the allowable motor shaft rotation speed of the machining axis by multiplying the gear ratio limit value in the spindle speed, the allowable motor shaft and the spindle speed means for determining the motor shaft rotational speed of the machining axis groups on the basis of the rotational speed, the when the motor shaft rotational speed can not be determined spindle
Based on Le rotational speed and said permissible motor shaft rotational speed, the
As a candidate to correct the cutting conditions from the machining axis group selected cutting data correction candidate machining axis, the cutting condition correction candidate machining axis
Information before the machining axes other than the candidate machining axis
2. A processing axis assignment information creating apparatus according to claim 1, further comprising: means for outputting correction auxiliary information determined by the permissible motor axis rotation speed and means for outputting the information. Wherein the cutting condition correcting means comprises means for calculating the cutting speed of the cutting condition correction candidate machining axis on the basis of a result of setting the motor shaft rotational speed setting means and said gear ratio limit value, the calculated 2. A machining axis assignment information creating apparatus according to claim 1, further comprising: means for comparing a cutting speed with a cutting condition range to determine whether or not to correct the cutting condition. Wherein said cutting condition correcting means calculates the cutting speed of the cutting condition correction candidate machining axis on the basis of the information of the cutting condition correction candidate machining axis information and the correction auxiliary information the gear ratio limit value 3. The machining axis assignment information creating apparatus according to claim 2, further comprising: means for comparing the calculated cutting speed with a range of the cutting conditions to determine whether or not to correct the cutting conditions. 5. The order of shift processing is indicated in the assignment information.
Depending on whether includes information step number, and the shift processing determining means determines the presence or absence of setting of the shift processing, when the setting of the shift processing there, the shift processing is already set
And the gear ratio limit value changing means for changing the gear ratio limit value of the machining axis groups, the setting of the shift processing there and the machining axis allocation means
Machining axes assigned in the order of other shift machining
When used as another machining axis group, the gear ratio limitation
The other processing based on the gear ratio determined based on the value
The machining axis assignment information creating apparatus according to any one of claims 1 to 4, further comprising: a motor shaft rotation number correcting unit configured to correct a motor shaft rotation number of the shaft group . 6. An input device for inputting a machining axis assignment instruction and a deletion instruction in a machining axis assignment information creating apparatus for assigning a plurality of machining axes to a gear head on a CAD.
And verify the positional relationship between the processing axes designated to be assigned by the input device , and determine the bearing position in the positional relationship.
Machining axis verification means for creating machining axis combination information including the bearing position correction availability information indicating whether or not correction is possible; screen display creation means for creating a screen display reflecting the machining axis combination information; and input to the input device. a machining spindle deleting means for deleting information about the specified machining axis from said working axis combination information by deletion instruction has, when correcting the machining axis combination information and the bearing position
Select the machining axis to implement the bearing position correction based on the correction point information on adverse effects occur, selection
Calculate the amount of correction of the bearing position with respect to the processed machining axis
And a bearing position correcting means for correcting the bearing position based on the correction amount of the bearing position. 7. The process between axes verification means, said means for determining a combination of machining axis on the basis of the machining axis allocation information, based on the bearing outer diameter information and wall thickness tolerance information and the machining axis position information processing Means for verifying the inter-axis pitch of the axes and extracting machining axis combination candidates requiring bearing position correction; means for verifying whether or not bearing position correction is possible for the machining axis combination candidates; and processing axis combination candidate information. 7. A machining axis assignment information creating apparatus according to claim 6, further comprising: means for creating machining axis combination information based on the bearing position correction availability verification result. 8. The bearing position correcting means calculates a point by referring to a condition file in which an adverse effect that occurs when the bearing position of the processing axis is corrected is converted into a point in advance and a condition file for each processing axis. Means for creating correction point information; means for setting a group of machining axes for which bearing position correction is to be performed based on machining axis combination information; and means for each group based on machining axis combination information and compensation point information. 7. The machining axis assignment information according to claim 6, further comprising: means for verifying whether or not the bearing position can be corrected and selecting a correction candidate, and means for determining a bearing correction amount for the selected correction candidate. Creation device. 9. The condition file includes: a condition file relating to a hole position tolerance; a condition file relating to a surface roughness of a machined part;
9. A condition file relating to a machining surface state of a machining position, wherein the various condition files are set using a distance between a tool tip and a bearing position, a tool diameter, and a spindle diameter as keys. Described machining axis assignment information creation device. 10. An apparatus according to claim 6, further comprising means for adding the correction amount of the bearing position to a spindle protrusion amount. 11. The apparatus according to claim 10, further comprising means for correcting a tooling layout based on the corrected spindle protrusion amount.