JPS6051905A - Automatic generating system of working condition data - Google Patents

Abstract

PURPOSE:To simplify an input work, and to execute working with a high accuracy by deriving a working condition data by multiplying a set standard working data by a coefficient of correction corresponding to a series of key data. CONSTITUTION:In a numerically controlled machine tool, a standard working condition data is edited, also a correcting coefficient value table is edited, and the respective data are written in an ROM16 of a control device 12. A key data for working of a machine tool 1 is written in an RAM17 through an interface I/F 15 from an operating board 11. A CPU13 sets a standard working data by a working cycle number in the key data in accordance with a system managing program of the ROM16 and writes it in the RAM17 or an auxiliary storage device 21. Subsequently, the CPU13 derives a working condition data by multiplying this standard working condition data by a correcting coefficient value corresponding to a series of key data, stores it in the RAM17 or the device 21, and controls the machine tool 1 basing on this data.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic creation system for machining condition data in a numerically controlled machine tool.

Conventionally, in numerically controlled machine tools, the material of the workpiece,
Machining conditions such as machining tools, movement and speed of the workpiece (hereinafter referred to as work) are created in accordance with the machining order, taking into consideration the shape and finished shape, and input into the control device. .

The control device controls the operation of the machine tool based on these machining conditions.

As an example of a machine tool, FIG. 1 shows a cylindrical grinder, and FIG. 2 shows an example of its control device. Furthermore, as an example of the machining process, a plunge grinding cycle diagram (Fig. 3) and a traverse grinding cycle diagram (W diagram) for one stage of the fourth group are shown. This will be explained below with reference to FIGS. 1 to 4. The names of symbols used in FIGS. 1 and 2 are shown below.

DESCRIPTION OF SYMBOLS 1... Cylindrical grinder, 2... Grinding wheel, 3.5... Drive motor, 4, 6... Feed mechanism, 7... Head stock, 8... Foot stock, 9... Work,
11... Operation panel (including processing condition data input and display device), 12... Control device, 13... Central OX processing unit (hereinafter referred to as CPU), 14... System path ( address path, data path, and control path), 15.1B, 19.20...I10 interface, 16...ROM (i leak dedicated memory), 17... 21 of the memo
...Auxiliary storage device.

X, Z: Machining coordinate system [X: Workpiece radial rotation (diameter display)
, 2: workpiece longitudinal direction], VW=workpiece rotation speed, vQ:
Grinding wheel rotation speed, a, c:) Laperse grinding stage, b = Zolanzi grinding stage, Data: Machining condition data, Sin: Input signal from cylindrical grinding machine (grinding wheel position, finished diameter of workpiece, etc.), 5out: Cylindrical grinding machine Output signals to (grindstone feed rate/feed speed, work rotation speed, table feed amount/feed speed, etc.).

Next, the names of the symbols used in the Shiranshi v1 (Fig. 3) are shown below.

Xo: Grinding head start position, XG: Air grinding start position, XR: Coarse grinding feed start position, XF: Sheath grinding feed start position, X8: Finishing diameter, Xw: Workpiece outside diameter before processing, Fo: Grinding head rapid traverse speed, FQ: Air grinding feed speed, FR: Rough grinding feed 9 speed, FF: N
Grinding feed speed, SR: coarse grinding dwell ffl, sr: fine grinding dwell amount, zL: left end position of processing section.

Next, the names of the codes used in the fourth group of traverse grinding cycles are shown below. However, xo, xa.

XRSXs N Xw % Fo % Fa % FR
XS and zL are the same as in FIG.

Xy: ) Laparse grinding start position, XF2: Second traverse grinding start position, PRl: First traverse right end pick amount, PLl: First traverse left end pick amount, Pi
L2: Second traverse right end pick amount, PL2: Second traverse left end pick amount, DR: Dwell amount after right end big,
DL: Dwell it after left end big, TB: Rightward travel speed of trapper, TL: Leftward travel speed of trapper, zII: Right end position of machining section, W: Front width of grindstone, ND: Dead 741 times, A: Work center axis.

Next, the outline of FIGS. 1 to 4 will be explained. The cylindrical grinding machine 1 rotates a workpiece 9 supported by a head stock 7 and a footstock 8 at a speed vw, and can slide the workpiece in the longitudinal direction by a motor 5 and a feeder s6. . Also, the speed o
Using the motor 3 and the feed mechanism 4, the grinding wheel 2, which is rotated by the grinding wheel 2, can be ground in the radial direction. That is, by controlling the operations in these two directions, the workpiece can be processed into the desired shape.

Here, the workpiece grinding cycle includes plunge grinding as shown in Fig. 3, traverse grinding as shown in Fig. 4, etc.
Assume that a workpiece as shown in the figure is finished by traverse grinding at machining stages a and c, and plunge grinding at stage b. Cylindrical grinder 1
The operator inputs the machining conditions (examples shown in FIGS. 3 and 4) necessary for machining stages a, b, and c into the control device 12 via the operation panel 11 according to the machining procedure.
, 12 take in machining condition data via the interface 15 under the control of a program written in advance in the ROM 16, store it in the RAM 1, and display the input data on a suitable display device W. (Illustrated). Then, in response to an execution command from the operation panel 11, the RAM
The machining condition data written in 17 is read out, and the grinding machine 1
It has a function of outputting the control signal 5out of the grinding machine 1 through the interface 18 while monitoring the state 81n of the grinding machine 1 through the interface 19.

Taking the detailed example of plunge grinding and traverse described above, processing is performed in the following steps, and the condition data required for each step is determined by considering the mutual relationship.

[Plunge grinding]

(From the starting position Xo, just before the grinding wheel contacts the workpiece
Fast forward to a (speed Fo) (2) Cut the grindstone into the workpiece until the coordinate XR. The feed speed is Fa (<Fo) (3) Coordinate Xpt, coarse grinding. The sending speed is FB.

(4) Rotate the whetstone while stopping the whetstone feed. dwell i
S.R.

(5) Seiken up to coordinate X8. Speed up the feed, FF0 (6)
Rotate the whetstone while stopping the whetstone feed. Dwell amount S2° (7) Retract the grindstone to the starting position Xo.

However, Fo ) Fa ) Fa > FF [Traverse grinding] 6- (1) Rapid traverse from starting position Xg to Xo just before the grinding wheel contacts the workpiece. (Speed Fo) (2) Cut the grindstone into the workpiece up to the coordinate Xm. The feed speed is FG (< i”o) (3) Coarse grinding until the coordinate X. The feed speed is FR.

(4) Rotate the whetstone while stopping the whetstone feed. Dwell lid sl.

(5) Return the grindstone to the coordinate XG' and move the workpiece by the width W of the grindstone in the longitudinal direction.

(6 bar 2) to (5) are the length coordinates of the machining part zL - ZR
interval) repeat.

(7) Move the whetstone slightly in the radial direction (at the right end of the machining section, PR
14. PLl at the left end) Make a cut and rotate the whetstone while stopping the whetstone feed. Dwell Do Da (far right),,,DL
(far left).

(8) Move the whetstone relative to the workpiece in the longitudinal direction.
Speed TR (move rightward M), TL (traverse at leftward shift slope).

(9) Repeat (7) and (s) up to the coordinate xF2, under the same conditions as the first traverse 0 (1 ml) lapast (Pm2,
P L 2 /I)R% DL/TR% 'pi,
) to repeat the traverse up to the coordinate X8. While stopping the feeding of the second traverse 0p grindstone, the grindstone is rotated and the grindstone is rotated ND times.

(6) Retract the grindstone.

However, Fo > Fs > Fn However, in the conventional numerically controlled machine tool (for example, a cylindrical grinder) illustrated in Figs. 1 and 2 above, Fig. 3,
In order to execute the machining cycle illustrated in Fig. 4,
It was necessary to input a large amount of processing condition data (for example, grindstone feed speed, feed speed switching point coordinates, work rotation speed, table feed speed, etc.). These machining condition data must be input one by one by the operator, keeping in mind the material, shape, finishing accuracy, etc. of the workpiece, and considering mutual relationships based on past experience and intuition. Therefore, there was a drawback that a large amount of time was spent on input work. Furthermore, if an unskilled person inputs information, the accuracy of the finished workpiece may be lowered because the machining conditions are not appropriate.

The present invention has been made in view of the above points, and includes means for editing standard machining condition data, means for editing a correction coefficient value table, and reading key data for machining in a numerically controlled machine tool. , a means for setting standard machining condition data using the machining cycle number in the key data, and a correction function corresponding to a series of key data for the standard machining condition data set by this means. The main feature is that it is equipped with a means to enter machining condition data by multiplying numerical values, and can automatically generate machining condition data from a small number of key data, simplifying input work and achieving high machining accuracy. The purpose is to provide an automatic processing condition data creation system.

An embodiment of the present invention will be described below with reference to the drawings. The gist of the present invention is to automatically create machining condition data based on the program structure shown in FIG. 5 (the principle is shown in FIG. 6, and the processing flow is illustrated in FIG. (Figure 8 shows an example of the processing flow)
Correction coefficient value table editing (the processing flow is illustrated in Fig. 9) 7'-Transfer processing u (Transfers the standard data straddle correction coefficient value table registered on the ROM to the RAM. Alternatively, the standard data straddle correction coefficient value table registered on the ROM is transferred to the RAM. Alternatively, the RAM and auxiliary memory The main point lies in the arrangement of processing programs for bidirectional data transfer between devices. The present invention provides a machine tool (a cylindrical grinder is taken as an example in this embodiment) and a tlil control device illustrated in FIGS. , the processing flow illustrated in FIG. 7 (ROM 16
The machining condition data is automatically generated according to the program registered in , and written to the RAM 17. In addition, RAM 17
shall have a battery backup and retain its contents even if the device is powered off. The names of symbols used in FIGS. 6 to 9 are shown below.

Ncyc: Grinding cycle % number, Kl)(i): Key data, Do(n): Machining condition r-ta, Ds(k,
n)+Ds”(k.

n): standard data table, Kt(j, n), Ki
*(j, n): 10- correction coefficient table; ni=Ncyc, l=1.2. ...
1M.

j = fl(KD(+)'), n = 1.2.・
= , N where, M: number of correction coefficients, N: number of processing condition data.

n: 7Jn construction condition number, 1: Correction coefficient number.

k: plane number of standard data table j: plane number of correction coefficient table; Da, Da and Kl, Kl are two-dimensional tables each consisting of a plurality of planes. Also, items with * in the subscript are assumed to be registered on ROM Z 6, and items without * are assumed to be registered on RAM I 7.
It is assumed that it was created in J-. It is assumed that the function is is for determining the plane IV of the correction coefficient value team 7'' corresponding to the key data KD(1), and is registered in the ROM 16.

S+, 8: Standard data citation flag sK: Correction coefficient value citation flag DMOD(n) 'Standard data correction data, K11
on(j): Correction data for correction coefficient value table.

Next, the operation of the above embodiment will be explained. The basics of the present invention are as shown in FIG.
N The aim is to automatically generate individual machining condition data. Second, standard data and correction coefficient values are
The point is that it can be edited as necessary on AM 17.

First, the effect of the first point will be explained according to FIG. Through the data input process 101, the grinding cycle number Neyc
, key data KD(]) , KD(2) , ,・
・KD (goods) and flag data S. Obtain 81sK.

In process 1θ2, the parrot data table D s (k
*n) or Ds*(k, n) plane number k is set to Ncyc obtained in process 101. Then, in process 103, when flag 5D8=1, the process moves to process 104, and 5Ds=
When it is 0, the process moves to process 105. In process 104, machining condition data D o (n) is created on the RAM 77 and initialized with standard data 1) s(k, n) (which can be edited according to the process flow shown in FIG. 8). On the other hand, in step 105, the condition data Do(n) is initialized with the standard data Ds*(kin) registered on the ROM Ze. After the process 104 or 105, the process moves to process 106, where the correction coefficient number l is set to 1.

Then, processes 107 to 112 are inverted until l exceeds M. Processing i] 4107 inputs the key data KD(1) to the function fi, and inputs the correction coefficient value table old (,i,
n)-straddle Kl Determine the plane number j of (j, n). Processing 10B is performed when Iλli when flag 5K=1.
The process moves to step 109, and when the SK is 20, the process moves to process 110. In process J (J9), the correction condition data Do(n) stored in the RAM 77 is successively stored, and the correction coefficient value Kl(j, n) created on the RAM 17 is stored (as shown in FIG. 9). (can be edited according to the processing flow), and then RAM 1
Processing condition data Do(n) of No. 7 is stored in the area of
After multiplying by the correction coefficient value Kl*(j, n) registered on JG, the machining condition data Do(n) in RAM 17 is again
) area. After processing 109 or 110, the process moves to processing 111, where the correction coefficient value Chi is incremented by one. In process 112, l and M are compared to determine whether the loop process from processes 107 to 112 has ended. Processing 11
2, if it is determined as 1) M, it means that automatic generation of all machining condition data has been completed.

When the generation of the machining condition data is completed, the control device 12 successively outputs the nloe condition data written in the RAM J 7 in response to an execution command from the operation panel 11, and controls the operation of the cylindrical grinding machine 1. .

Next, the second point above will be explained. First, the standard data editing process shown in FIG. 8 consists of processes 201 to 208. In process 201, the grinding cycle number Ncycf is read, and in process 202, the plane number k of the standard data table I')s(k+n) is read as Ncycf.
Initialize with cyc. Process 203, D s (k r
n ) (n=1.2..., N) is displayed on a display device (not shown) on the operation panel 1 to assist in editing.

Process (jl) 204 checks whether there is a request for modification costs, and if there is no modification, the process goes to process 208. If there is modification data, the process advances from process 204 to process 205, and the modification data DMoD(n
). Processing 206 times, standard data Da(k+n)
is replaced with the modified data DM OD (n), and further, in process 207, the modified result is displayed on the display device #t(n) on the operation panel Il.
(not shown). Processing 208f'J determines whether or not to continue the editing work, and if continuing, processing 201 is performed again.
Return to

Next, the editing process of the correction coefficient value table in FIG.
Consists of 41!30I to 310. Place I11!30
1 reads the correction coefficient number 1, and in step 302, the machining condition number n is set to 1. Processes 303 to 309 are n
The process is repeated until N exceeds N. In process 303, the correction coefficient value Ki (j, n) (j=1.2..., j) is displayed on the display device on the operation panel II. In process 304, the presence or absence of a modification request is confirmed, and if there is no modification, the process jumps to process 308.

If there is modified data, the process advances from step 304 to step 305, and the modified data KMoD(j) is read. Processing 306 includes:
Correction coefficient value Kl (j, n) is corrected data KMoD (j)
In addition, in process 307, the correction result is displayed on the operation panel II.
Display on the display device above. Process 308 increments the processing condition number n by 1, compares n and N in process 309, and processes 30
It is determined whether the loop processing from 3 to 309 has ended. When n>N, it means that the editing work for correction coefficient number l has been completed, and the process moves to step 310. On the other hand, n <
If N, the process returns to step 303. Processing 310 determines whether or not to continue the editing work, and if continuing, processing 307 is performed again.
Return to

Note that the standard data or correction coefficient value table is stored in the ROM.
Transfer what is registered on the IG or auxiliary storage device 21 to the RAM 17 (processing flow is not illustrated)
However, it is also possible to perform editing based on this, and conversely, the editing results on the RAM 77 can also be registered in the auxiliary storage device 21 via the interface 20.

1U As mentioned above, according to the present invention, FIGS. 5 to 9
By adopting the configuration illustrated in the figure, machining conditions can be automatically generated by simply inputting a few key data without having to input a large amount of machining condition data, reducing the need for manual machining. The number of man-hours required can be reduced and high processing accuracy can be obtained.

In addition, although FIGS. 6 and 7 are illustrated in a general format,
In reality, as machining condition data, for example, Figures 3 and 4
Define each variable shown in the figure, and key data includes, for example, the shape of the workpiece.

Possible factors include material, hard JW, roughness, machining allowance, gauge, etc., and each should be set within a reasonable range for processing. It is obvious that the types of variables or correction coefficient values to be registered as processing conditions can be arbitrarily added or deleted depending on various processing conditions.

17- Furthermore, since the standard machining condition data and the 1 correction coefficient value table can be edited on the RAM, it is possible to flexibly deal with the characteristics of the workpiece and various constraints on machining. This allows the operating range of the machine tool to be expanded.

[Brief explanation of drawings]

Figure 1 is a diagram showing the schematic configuration of a conventional numerically controlled machine tool.
Figure 2 is a block diagram showing an example of the configuration of the control device;
Figure 4 is an operational diagram of the Zolange grinding cycle in the machining process, Figure 4 is an operational diagram of the traverse grinding cycle in the machining process, and Figures 5 to 9 show an embodiment of the present invention. is a diagram showing the overall program structure, Figure 6 is a diagram showing the principle of automatic creation of machining condition data, Figure 7 is a diagram showing the process 70- of automatic creation of machining condition data, and Figure 8 is a diagram of standard data editing. A diagram showing the processing flow,
FIG. 9 is a diagram showing a processing flow for editing a correction coefficient value table. DESCRIPTION OF SYMBOLS 1... Cylindrical grinder, 2... Grinding wheel, 3.5... 18-motor for drive, 4, 6... Feeding mechanism, 7... Head strike, 8... Foot・Stock, 9...Work, I
I...Operation panel, I2...Control device, 13...Central processing unit # (CPTr'l, 14...System path, 15°Ill, 19.20...I10 interface, 16. ...ROM117...RAM, IJ...
・Auxiliary storage device. Applicant Sub-Agent Patent Attorney Takehiko Suzue 19- Figure 1

Claims (1)

[Claims] In a numerically controlled machine tool, there is a means for editing standard machining condition data, a means for editing a correction coefficient value table, a means for reading machining key data, and a means for editing the machining cycle code in the key data. , a means for setting standard machining condition data; and a means for setting the machining condition r-value by multiplying the set standard machining condition data by a correction coefficient value corresponding to a series of key data. An automatic processing condition data creation system characterized by comprising means.