JPH0649264B2 - Machining control method for multi-face machining machine tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a). BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining control method for a multi-face machining machine tool, which does not require registration of a work origin on each machining plane during actual machining.

(b). Conventional technology Conventionally, when performing machining that involves turning the table, after creating a machining program for each machining surface, when machining the first workpiece, the reference position such as the tip of the tool contacts the workpiece origin. It was necessary to register the work origin for each machined surface in the machine tool by such a method.

(c). However, this requires an operator to register the workpiece origin for each machining surface each time the workpiece to be machined changes, which is extremely complicated and requires a small amount of recent work. There was an inconvenience that we could not cope with the trend of unmanned production of many kinds of products and processing work.

In order to eliminate the above-mentioned drawbacks, the present invention requires only a registration operation for one reference point when processing the first work piece.
An object of the present invention is to provide a machining control method in a multi-face machining machine tool that does not require the work of registering the work origin for each machining surface.

(d). Means for Solving the Problems That is, according to the present invention, a reference point (SPT) which is a reference for processing is provided.
Machine coordinate values for the machine origin (MZP) of the first work surface (a) and the work origin (WZP) of the first work surface 12a for the reference point (SPT) when the first work surface (12a) faces the machine origin (MZP). Coordinate values (x _S1 , y _S2 , z _S2 ) and coordinate values of the workpiece origin (WZP) on each machining surface with respect to the workpiece origin (WZP) of the first machining surface (x ₁₂ , y ₁₂ ... x _1n , Y _1n , z _1n ) and the rotation angle (α ₁ , α ₂ ... Of the table (11) with respect to the first machining surface, which is necessary when machining is performed with each machining surface facing the machine origin (MZP). ... alpha _n), further provided with a workpiece origin of each processing surface (the first memory means (8 machining program relative to the WZP) a (SPR) stored for each processing surface), the machine turning center (CT) Stores the machine coordinate value for the origin (MZP) A second memory means (2) is provided, and when machining each machining surface, the position of the machining origin (WZP) of each machining surface with respect to the turning center (CT) is set to the workpiece origin (WZP) of the first machining surface (12a). ), The coordinate value with respect to the reference point (SPT), the coordinate value of the work origin of each machining surface with respect to the work origin of the first machining surface, the machine coordinate value of the reference point (SPT), and the machine coordinate of the turning center (CT). The value is calculated from the value and the calculated work origin (W
From a position with respect to the turning center of ZP) (CT), at which the machined surface to be processed is facing the only pivoted mechanical home the rotation angle _{α 1, α 2 ...... α n} , the turning center of the workpiece zero (WZP) ( CT), and based on the calculated work origin (WZP) position, the coordinate value of the machining program (SPR) for each corresponding machining surface is used as the machine coordinate value after turning in the table (11). It is configured such that each processing surface (12) is converted and processing is performed based on the converted machine coordinate value.

It should be noted that the numbers in parentheses indicate the corresponding elements in the drawings for the sake of convenience, and thus the present description is not limited to the description in the drawings. The same applies to the section "(e). Action" below.

(e). Action With the above-described configuration, the present invention measures the coordinate value of the reference point (SPT) with respect to the machine origin (MZP) during machining, and registers it in the first memory means (8) to turn the table. Work origin of each subsequent machining surface (WZP)
Machine coordinate values are calculated, and based on the workpiece origin (WZP) for which the machine coordinate values are calculated, the machining program (SP
R) acts to be performed.

(f). Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a control block diagram showing an example of a multi-face machining machine tool to which an embodiment of a machining control method according to the present invention is applied, FIG. 2 is a diagram showing an example of a workpiece to be machined, and FIG. 3 is a machining program. FIG. 4 is a plan view showing the positional relationship between the processing surfaces.

As shown in FIG. 1, the multi-face machining machine tool 1 has a main control unit 2, and the main control unit 2 has a display unit 3 such as a display, an input unit 5 such as a keyboard, an execution control unit 6, The machine coordinate system conversion calculation unit 4, the machining program memory 8 and the like are connected. The execution control unit 6 is connected to a plurality of drive motors 7 for driving each control axis of the multi-face machining machine tool 1.

As shown in FIG. 2, the multi-face machining machine tool 1 has a spindle 10 that rotatably supports a tool 9.
0 is provided so as to be movable in the vertical direction of FIG. 2, that is, in the y-axis direction. A table 1 is located on the right side of FIG.
1 is provided, and the table 10 is provided so as to be movable in the X-axis and Z-axis directions and to be rotatable in the directions of arrows A and B around the swing center CT. A work 12 is mounted on the table 11, and the work 12 has a substantially rectangular shape. The work 12 has four machining surfaces, a first machining surface 12a, a second machining surface 12b, and a third machining surface 12.
c and the fourth machining surface 12d, and the respective workpiece surfaces 12a, 12b, 12c, and 12d are set with the workpiece origin WZP that serves as a reference for machining the machining surface. The first processed surface 12a has a step, as is clear from the figure.

Since the multi-face machining machine tool 1 has the above-described configuration, when machining the workpiece 12, the main control unit 2 reads the machining program PRO for the workpiece 12 from the machining program memory 8. In the machining program PRO, as shown in FIGS. 2 and 3, the machine coordinate value XA1 of the reference point SPT of the workpiece 12 viewed from the machine origin MZP,
The block CD1 storing the turning angle B of the table of the machining surface provided with YA1, ZA1 and the reference point SPT (the rotation angle of the table 11 when the machining surface is positioned perpendicular to the Z axis) is First there is. Therefore, the operator appropriately moves the table 11 in the Z- and X-axis directions to make the tool 9
The edge of the blade is brought into contact with the reference point SPT, and the reference point SPT
Position of the machine relative to the machine origin MZP and measure its coordinate value X
As shown in FIG. 3, A1, YA1, and ZA1 are stored at predetermined addresses in the block CD1. Reference point SPT
As shown in FIG. 2, is normally provided in a form corresponding to the reference surface among the plurality of processing surfaces of the work 12, that is, the work origin WZP of the first processing surface 12a, but this is not always necessary. Of course.

In the next block CD3 of the machining program PRO, the first
The coordinate value (x _S1 , y _S1 , z _S1 ) of the workpiece origin WZP of the machined surface with respect to the reference point SPT and the rotation angle α ₁ of the table 11 when the first machined surface is positioned perpendicular to the Z axis are stored. Further, in the next block CD2, the workpiece origin WZP relating to the respective machining surfaces 12b, 12c, 12d other than the first machining surface 12a (the workpiece origin WZP is the machining surface 1).
(One is provided for 2b, 12c, 12d)
The coordinate values (x ₁₂ , y ₁₂ , z ₁₂ ... X _1n , y _1n , z _1n ) of the first machining surface 12a with respect to the workpiece origin WZP are set (see FIG. 4). Further, in the block CD2, the rotation angles α ₂ ... α _n of the table 11 of each machining surface (the rotation angle of the table 11 when each machining surface is positioned perpendicular to the Z axis) are set. As shown in FIG. 3, these data are designated block by block with a command “M-OFS” at the beginning for each machining surface 12.
In the case shown in the figure, from the upper side in the figure, the first processed surface 12a,
Second machining surface ..., Data regarding the nth machining surface are stored in this order. Further, in each of the blocks CD2 and CD3, with respect to the processed surface corresponding to the blocks CD2 and CD3,
The work number WNO for machining the machining surface is stored (that is, the work number WNO of the first machining surface 12a).
Is 1, the work number WNO of the second machining surface 12b is 39, and the work number WNO of the nth machining surface 12n is 902. The main controller 2 reads out the machining program PRO, and reads the machine coordinate values (XA1, YA1, ZA1) of the reference point SPT shown in the block CD1 and the reference point SP.
Coordinate values (x _S1 , y _S1 , z _S1 ) of the work origin WZP of the first machining surface 12a based on T and the machining surfaces 12b, 12c, 12 with respect to the work origin WZP of the first machining surface 12a.
Coordinate value of the workpiece origin WZP of d (x ₁₂ , y ₁₂ , z ₁₂ ...
x _1n , y _1n , z _1n ), the first machined surface is the machine origin MZP
The coordinate system conversion calculation unit 4 calculates the coordinates of the work origin of each machining surface with the turning center CT of the table 11 as the center when facing each other. Since the coordinate values XB, YB, ZB (see FIG. 4) of the turning center CT with respect to the machine origin MZP are set as parameters in advance in an appropriate memory in the main control unit 2, such calculations can be easily performed. Be seen. That is,
The position of the workpiece origin WZP on the first machining surface is represented by the following equations (1) to (3), where the coordinates from the turning center CT of the table are xa ₁₁ , ya ₁₁ , and za ₁₁ .

_{xa 11 = x S1 + XA1-} XB ...... (1) ya 11 = y S1 + YA1-YB ...... (2) za 11 = z S1 + ZA1-ZB ...... (3) Further, a reference to the turning center CT of the table 11 When the coordinates of the workpiece origin WZP on the second surface are xa ₁₂ , ya ₁₂ , and za ₁₂ , these are expressed by the following equations (4) to (6).

xa ₁₂ = xa ₁₁ + x ₁₂ (4) ya ₁₂ = ya ₁₁ + y ₁₂ (5) za ₁₂ = za ₁₁ + z ₁₂ (6) where (1) + (3) is changed to (4) ) is substituted to _{(6), xa 12 = x S1 + XA1} -XB + x 12 ...... (7) ya 12 = y S1 + YA1-YB + x 12 ...... (8) za 12 = z S1 + ZA1-ZB + x 12 ...... It becomes (9).

When the coordinates of the workpiece origin WZP on the n-th machined surface with respect to the CT of the turning center are xa _1n , ya _1n , and za _1n , xa _1n = x _S1 + XA1 −XB + x _1n (10) ya _1n = y _{S1 + YA1-YB + y 1n ......} (11) za 1n = z S1 + ZA1-ZB + x 1n ...... becomes (12).

Thus, the turning center C of the workpiece origin WZP of each machining surface when the first machining surface 12a faces the machine origin MZP.
When the coordinate value based on T is calculated, the main control unit 2 performs the machining on the first machining surface 12a of the machining program PRO via the execution control unit 6. First processed surface 12a
In the machining program for machining, since the corresponding block CD3 in the machining program PRO is indicated by the work number WNO, the main control unit 2 is displayed in the block CD3 (here, the work number WNO is 1). The machining program SPR is read from the machining program memory 8 and executed.

At this time, since the first machining surface 12a is already positioned at the predetermined machining position (the position where the machining surface 12a and the machine origin MZP face each other), the table 11 immediately performs the predetermined machining without any rotation. You can When executing the machining program SPR, the machining program SPR
Machine coordinate value of workpiece origin WZP (xw ₁₀ ,
yw _10, zw ₁₀₎ becomes _{xw 10 = x S1 + XA1 ......} (12) yw 10 = y S1 + YA1 ...... (13) zw 10 = z S1 + ZA1 ...... (14). Therefore, the workpiece origin WZ of the first machining surface 12a
The coordinate values (xw _1m , yw _1m , zw _1m ) in the machining program SPR displayed based on P are machine coordinate values (XW _1m , YW _1m , ZW _1m ) based on the machine origin MZP, and XW _1m = Xw _1m + XA1 + x _S1 (15) YW _1m = yw _1m + YA1 + y _S1 (16) ZW _1m = zw _1m + ZA1 + z _S1 (17) The main controller 2 causes the processing unit 4 to process the program SPR.
Coordinate values (x
w _1m , yw _1m , zw _1m ) is converted into machine coordinate values (XW _1m , YW _1m , ZW _1m ) based on the machine origin MZP, and the execution controller 6 is operated based on the calculated machine coordinate values. To execute it.

The machining of the first machining surface 12a by the machining program SPR is completed, and then the table 11 is rotated by a ₂ degrees to make the second machining
When the machined surface 12b and the machine origin MZP are opposed to each other, and the second machined surface 12b is machined in this state,
The main control unit 2 tells the calculation unit 4 the coordinate value (x of the workpiece origin WZP of the second machining surface 12b based on the turning center CT).
_{w '20, yw' 20,} zw '20) is computed to. Since the table 11 is rotated by the angle α ₂ from the first machining surface 12a, xw ′ ₂₀ = xa ₁₂ · COSα ₂ + za ₁₂ · SINα ₂ …… (18) yw ′ ₂₀ = ya ₁₂ …… (19) zw ′ ₂₀ = xa ₁₂ · SINα ₂ + za ₁₂ · COSα ₂ (20). Therefore, the machine coordinate value of the workpiece origin WZP (xw
₍₂₀ , yw ₂₀ , zw ₂₀ ), xw ₂₀ = XB + xw ′ ₂₀ (a) yw ₂₀ = YB + yw ′ ₂₀ (b) zw ₂₀ = ZB + zw ′ ₂₀ (c)

Therefore, the coordinate values (xw _2m , yw _2m ) in the machining program SPR (the machining program SPR corresponding to the work number WNO of 39 in FIG. 3) displayed on the basis of the workpiece origin WZP on the second machining surface 12b. , Zw _2m )
Is in the machine coordinate system based on the machine origin MZP,
It is represented by coordinate values (XW _2m , YW _2m , ZW _2m ).

XW _2m = xw _2m + xw ₂₀ ...... (d) YW _2m = yw _2m + yw ₂₀ ...... (e) ZW _2m = zw _2m + zw ₂₀ ...... (f) That is, XW _2m = xw _2m + XB + xa ₁₂・ COSα ₂ + za ₁₂・ SINα ₂ …
… (G) YW _2m = yw _2m + YB + ya ₁₂ …… (h) ZW _2m = zw _2m + ZB + za ₁₂・ COSα ₂ + xa ₁₂・ SINα ₂ ….
(I) Based on the machine coordinate values arithmetically converted by the arithmetic unit 4, the execution control unit 6 executes machining based on the machining program SPR for the second machining surface.

Next, when the main control unit 2 performs machining on the n-th machining surface, the coordinate values (xw _nm , yw _nm , zw _nm ) in the machining program SPR for the n-th surface are calculated by the arithmetic unit 4 by the machine unit 4. Machine coordinate values in the coordinate system (XW _nm , YW _nm , ZW _nm )
Is calculated and executed.

XW _nm = xw _nm ＋ XB ＋ xa _in・ COSα _n ＋ za _in・ SINα _n
…… (j) YW _nm = yw _nm ＋ YB ＋ ya _in …… (k) ZW _nm ＝ zw _nm ＋ ZB ＋ za _in・ COSα _n −xa _in・ SINα _n
…… (l) Thus, the machining program SPR for each machining surface
Is subjected to coordinate conversion in the arithmetic unit 4 in a form corresponding to the turning angle amount of the table 11, and is executed by the execution control unit 6.

In the above-described embodiment, the machining program SPR for machining each machining surface 12a, 12b, 12c, 12d is designated by the work number WNO in the machining program PRO, and the machining program SPR corresponding to the work number WNO is designated as a sub-program. The case where the program is called and executed as a program has been described, but it goes without saying that the machining program SPR may be directly stored in the machining program PRO in addition to the above method.

(g). EFFECTS OF THE INVENTION As described above, according to the present invention, the machine coordinate value of the reference point SPT, which is the reference for processing, with respect to the machine origin MZP, and the case where the first machining surface faces the machine origin MZP, Coordinate values (x _S1 , y _S1 , z _S1 ) of the workpiece origin WZP of the first machining surface 12a with respect to the reference point SPT and coordinate values of the workpiece origin WZP of each machining surface with respect to the workpiece origin of the first machining surface (x ₁₂ , y ₁₂ , z ₁₂ ... x _1n , y
_1n , z _1n ) and 11 rotation angles α of the table, which are required when machining is performed with each machining surface facing the machine origin MZP.
₁ , α ₂ ...... α _n , a first memory means such as a machining program memory 8 storing a machining program SPR based on the workpiece origin WZP of each machining surface for each machining surface, and a machine origin MZP of the turning center CT. The second memory means such as the main control unit 2 storing the machine coordinate value for the machining center is provided, and when machining each machining plane, the position of each machining plane with respect to the turning center CT of the work origin WZP is set on the first machining plane 12a. Coordinate values of the workpiece origin WZP with respect to the reference point SPT, coordinate values of the workpiece origin of each machining surface with respect to the workpiece origin WZP of the first machining surface 12a, mechanical coordinate values of the reference point SPT, and mechanical coordinate values of the turning center CT. The calculated surface is calculated from MCV, and from the calculated position of the workpiece origin WZP with respect to the turning center CT, the processing surface to be processed is the rotation angle α ₁ ,
When the workpiece is rotated by α ₂ ... α _n and faces the machine origin MZP, the position of the workpiece origin WZP with respect to the swing center CT is calculated, and based on the calculated workpiece origin WZP position, the corresponding machining surface is calculated. Processing program SP
The coordinate value of R is converted into the machine coordinate value after turning of the table 11, and each machining surface 12 is converted based on the converted machine coordinate value.
Since it is configured so that the machining is performed on the machine origin, at the time of machining, the worker does not operate the reference point SPT with respect to the machine origin MZP.
By measuring the coordinate values XA1, YA1, ZA1 of the above and registering them in the first memory means, the machine coordinate value of the workpiece origin WZP of each machining surface after the turning of the table 11 is immediately calculated, and the machine coordinate values are calculated. Since the machining program SPR is executed based on the calculated work origin WZP, the operator performs the registration work for each machining surface of the work origin WZP, which was performed when actually machining the work, only for the reference point SPT. It is better to do it, and it is possible to accurately respond to trends such as small-quantity, high-mix production and unmanned processing work.

It should be noted that the data elements stored in the first and second memory means may have any form in the memory element, and even if they are stored in the same element, they are dispersed in a plurality of elements. May be stored in.

[Brief description of drawings]

FIG. 1 is a control block diagram showing an example of a multi-face machining machine tool to which an embodiment of a machining control method according to the present invention is applied, FIG. 2 is a diagram showing an example of a workpiece to be machined, and FIG. 3 is a machining program. FIG. 4 is a plan view showing the positional relationship between the processing surfaces. 1 ... Multi-face machining machine tool 2 ... Memory means (main control unit) 8 ... Memory means (machining program memory) 11 ... Table 12 ... Work 12a ... First machining surface (machining surface) 12b, 12c, 12d …… Machining surface MZP …… Machine origin SPT …… Reference point WZP …… Work origin SPR, PRO …… Machining program CT …… Rotation center

Claims (1)

[Claims] Claims: 1. A table having a rotatable table, on which a workpiece having a plurality of machining surfaces is set, is mounted. When machining, the table is swiveled to form a workpiece to be machined to the machine origin. In a multi-sided machine tool that performs machining with the machining surfaces facing each other, the machine coordinate value for the machine origin of the reference point that serves as the machining reference, the reference when the first machining surface faces the machine origin Coordinate value of the work origin of the first machining surface with respect to the point, and
Coordinate values of the work origin on each machining surface with respect to the work origin of the first machining surface, the rotation angle of the table necessary for machining with each machining surface facing the machine origin, and the workpiece on each machining surface. A first memory means for storing a machining program based on the origin for each machining surface is provided, and a second memory means for storing the machine coordinate value with respect to the machine origin of the turning center.
Is provided, the position of the work origin of each work surface with respect to the turning center is set to the position of the work origin of the first work surface.
The coordinate value for the reference point and the work origin of each machining surface
From the coordinate value of the first machining surface with respect to the work origin, the machine coordinate value of the reference point, and the machine coordinate value of the turning center, and from the calculated position of the work origin with respect to the turning center,
When the machining surface to be machined faces the machine origin rotated by the rotation angle, the position of the work origin with respect to the center of rotation is calculated, and based on the calculated work origin position, for each corresponding machining surface. A machining control method for a multi-face machining machine tool configured to convert the coordinate values of the machining program of 1 to the machine coordinate values after turning the table and perform machining on each machining surface based on the converted machine coordinate values.