JPS6094252A - Nc machine tool - Google Patents

Abstract

PURPOSE:To reduce the manhour necessary for the input of working condition by installing a means for editing the standard working condition data and a means for obtaining the total sum of the correction-coefficient numerical-values on the basis of a series of key data and for obtaining the working condition data by multiplying the above-described total sum by the above-described data. CONSTITUTION:Each processing program for automatic automatic preparation of working condition, standard data editing, correction-coefficient numerical- value table editing, and data transfer processing is registered into the ROM16 of a controller 12 for controlling the working machine such as cylindrical grinder 1, etc. The total sum of the correction-coefficient numerical-values obtained corresponding to arbitrary key data input from an operating panel 11 is obtained, and N pieces of the working condition data are automatically prepared by multiplying said obtained value by the standard data corresponding to the grinding cycle number and written into an RAM17. Then, the working condition data written into the RAM17 is read-out through the execution instruction supplied form the operation panel 11, and the movement operation of the cylindrical grinder 1 is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in numerically controlled machine tools.

In a numerically controlled machine tool, machining condition data such as the material, shape, finishing speed, etc. of an object to be machined (hereinafter referred to as a work) is created according to the machining order, and is input into a control device. The control device then controls the operation of the machine tool based on the input machining condition data.

Fig. 1 shows a cylindrical grinder as an example of this numerically controlled machine tool, Fig. 2 shows the configuration of its control device, and Figs. 3 and 4 show a plano grinding cycle as an example of the machining process using the cylindrical grinder. , all the operation diagrams for one stage of the traverse grinding cycle are shown.

The cylindrical grinding machine 1 shown in FIG. It can be slid in any direction. Further, by moving the grindstone 2 rotating at a speed vG in the radial direction of the workpiece 9 using the motor 3 and the feed mechanism 4, the workpiece 9 can be ground in the radial direction.

That is, the longitudinal direction of the workpiece 9 and the radial direction of the grindstone 2 /7N
Ah lh-! f-ill 1ldn-h L>
Lbr? It can be processed into the size and shape of h n - force nt - mouth 6h.

Here, the grinding cycle of the workpiece 9 includes plunge grinding, which shows the operating action as shown in FIG. 3, traverse grinding, which shows the operating action as shown in FIG.
The part is finished by traverse grinding, and the step part is finished by plunge grinding.

In actual machining, the operator of the cylindrical grinding machine 1 instructs the control device 12 via the operation panel 11 to control the machining stages a and b.
, machining conditions (examples shown in FIGS. 3 and 4) necessary for machining portion c are input according to the machining procedure. The control device 12 takes in processing condition data via the interface 15 under the control of a program written in advance in the ROM 16, stores it in the RAM 17, and displays the input data on a suitable display device (not shown). indicate.

Then, in response to an execution command from the operation panel 11, RAM 1
Read the machining condition data written in 7, and turn the cylindrical grinder 1
The control signal S of the cylindrical grinding machine 1 is monitored while the state Sin of the cylindrical grinding machine 1 is monitored via the interface 19. ut via the interface 18. In FIG. 2, 13 is a central processing unit, 14 is a system path, 20 is an interface, and 21L is an auxiliary storage device.

Incidentally, the plunge grinding of the stepped portion of the workpiece 9 is performed in the following procedure (see FIG. 3).

(1) Fast forward from the starting position to position XG at speed Fo just before the grindstone 2 contacts the workpiece 9.

(2) Cut the grindstone 2 into the workpiece 9 at the speed FG (<F.) up to the coordinate xR.

(3) Rough grinding to coordinate xF at feed speed FR.

(4) Rotate the grindstone 2 while stopping its feeding. The dwell amount at this time is sR as shown in the figure.

(5) Perform fine grinding at the feed rate FF to the coordinate Xs.

(6) Rotate the grindstone 2 while stopping its feeding. As shown in the figure, the dwell measurement at this time is SF.

(7) Starting position X. The grindstone 2 is retracted until the point.

Further, traverse grinding of the machining stages a and e of the workpiece 9 is performed according to the following procedure (see FIG. 4).

(1) Rapidly traverse at speed Fo from the starting position to position XG, where the grindstone 2 is on the verge of contacting the workpiece 9.

(2) Cut the grindstone 2 to the coordinate xF at a feed rate FG (<F.).

(Rough grinding is performed at the feed speed pn until the 3rd coordinate XG.

(4) Rotate the grindstone 2 while stopping its feeding. Let the dwell amount at this time be sR as shown in the figure.

(5) Return the grindstone 2 to the coordinate XG and move the workpiece 9 by the width W of the grindstone in its longitudinal direction.

(6) Repeat the operations (2) to (5) above for the length of the machining section (section from coordinates zL to zR).

(7) Move the grindstone 2 slightly in the radial direction (PB at the right end of the machining part)
+, PH+ at the left end), rotate the grindstone 2 while stopping the feed of the grindstone 2. The dwell amount at this time is DR at the right end and DL at the left end.

(8) The two grinding wheels are traversed in the longitudinal direction relative to the workpiece 9 at speeds TR (rightward movement), Tt (leftward movement).

(9) Repeat the above operations (7) and (8) up to the coordinate XF2.
return.

This is called the first traverse.

αQ Same conditions as the first traverse above (PH1, PL
2/DR, DL/TR, TL) to repeat the traverse to the coordinate Xs. This is called the second traverse.

(b) While keeping the whetstone 2 still, rotate the whetstone 2 and
Let the spark Φ out.

Q4: Retract the grindstone 2.

The above are the processing procedures for plunge grinding and traverse grinding, but in order to execute these processing cycles, a large amount of processing condition data, such as the feed rate of the grinding wheel, the coordinates of the feed rate switching point, the work rotation speed, I had to input the table feed speed, etc. These machining condition data were determined by the operator taking into consideration the material, shape, finishing accuracy, etc. of the workpiece, and were entered one by one, requiring a great deal of effort and time to enter the data. I didn't get it. Further, when the operator is an unskilled person, the accuracy of the finished workpiece may not be satisfactory because the input machining condition data is not appropriate.

The present invention has been made to effectively eliminate such inconveniences, and its purpose is to provide a numerically controlled machine tool that can reduce the number of man-hours required for inputting machining condition data. be.

To achieve such an object, the present invention comprises a means for editing standard machining condition data, a means for editing a correction coefficient value table, and a means for reading key machining data and means for setting standard machining condition data based on the machining cycle number, further calculating the sum of correction coefficient values corresponding to a series of key operation data, and multiplying this by the standard machining condition data to obtain machining condition data; The present invention is characterized in that it is provided with means for transferring data for executing each of the above-mentioned means.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Figure 5 is a diagram showing the processing program configuration, Figure 6 is a diagram showing the configuration of the processing condition data automatic creation program, Figure 7 is a diagram showing the processing flow of the program, and Figure 8 is a diagram showing the processing flow of the standard data editing program. , FIG. 9 is a diagram showing the processing flow of the correction coefficient value table editing program.

The key point of the present invention is that processing programs for automatically creating machining condition data, editing standard data, editing a correction coefficient value table, and data transfer processing are arranged as shown in FIG.

According to the present invention, for example, in the cylindrical grinding machine 1 and the control device 12 shown in FIGS. 1 and 2, the operation panel 11
Machining condition data is automatically generated according to the processing flow shown in FIG. 7 (program registered in the ROM 16) for any key data input from the RAM.
17. It is assumed that the RAM 17 is equipped with a battery and backup, and retains its contents even if the power of the device is turned off.

By the way, the processing condition data automatic creation program is processing condition data D as shown in FIG. G) and a key ψ data group KD(i), and the key data group KD (1) is further a standard data table D8(k, n).

D8' (k, n) and correction coefficient table [4(j
, n).

It is composed of Ki*(j, n). Here, 1=1゜2
,...2M is the correction coefficient number, M is the number of correction coefficients, j
= fi (KD(t)) is the plane number of the correction coefficient table, and fl is a function for determining the plane number of the correction coefficient value table according to the key data KD(1), which is registered in the ROM 16. Also, n=1.2.・・・
・, N is the machining condition number, N is the number of machining condition data, k
is the plane number of the standard data table, j is the plane number of the correction coefficient table, and hJcyc is the grinding cycle number.

* The above Ds, DB and Ki, Ki are two-dimensional tables each consisting of a plurality of planes, and D8°Ki is R
DB* and Ki* are registered on AM 17 and ROM 16, respectively.

The basics of the present invention are, firstly, as shown in FIG.
Correction coefficient value (It
(registered on OM 16 or generated on RAM 17), and calculates the total sum as standard data (registered on ROM 16, or generated on RAM 17) according to the grinding cycle number (registered on ROM 16, or li RA?, 41
The objective is to automatically generate N pieces of machining condition data by multiplying the generated value on γ. Second, standard data and correction coefficient values can be edited on the RAM 17 as necessary.

The first point will be explained according to FIG. Data input processing 1
01, a grinding cycle number 1'Jcyc, key data KD(1), KD(2), . . . , KD(goods), and flag data SDS, SK' are obtained. In process 102, plane number k of standard data table D8(k,n) or (k,n) is N obtained in process 101. Let it be yc. Then, in process 103, the flag SDS
”If it is 1, proceed to process 104, and if SDS = O,
The process advances to process 105. Processing 104 is processing condition data Do
(n) and ■ are also standard data D8 created on AM17.
(k, n) (processing illustrated in FIG. 8) (can be edited with p-). On the other hand, processing 105 is processing condition data D. Initialize with standard data Dg (k, n) registered on the axis i ROM 16. After process 104 or process 105, the process moves to process 106, where the machining condition number is set to 1. Then, the loop processing LOOpl from processing 107 to 117 is repeated until n exceeds N. In process 107, the work coefficient KT for adding the correction coefficient is set to 1.
．． Initialize to 0. In process 108, the correction coefficient number l is set to 1. Here, processes 109 to 114 are loose processing LDOP 2, and are repeated until i exceeds M. In process 109, key data KD(i) is input to function fi, and correction coefficient value table Ki(j, n
)t or the plane number j of Ki(jr n ). In process 110, when the flag 5K=1, the process proceeds to process 111, and when 5K=O, the process proceeds to process 112. In process 111, the work collection is added. On the other hand, the process 112 is
Add 4 (j, n) to the correction coefficient value registered on the ROM 16 for the work variable KT. After the process 111 or 112, the process moves to process 113, where the correction coefficient number i′f
, increment by one. In process 114, I and M are compared, and process 1
It is determined whether the loop processing from 09 to 114 has ended. If it is determined in step 114 that i>M, this means that the sum of the correction coefficient values has been determined by KT.

Furthermore, in process 115, processing condition data D written in the RAM 17 is processed. ) and loop processing mLDOP 2
The total sum KT of the correction coefficient values obtained in . By multiplying by ω, the machining condition data D in RAM 17 is returned. Store in area (n). Process 11611″l: Increase the processing condition number n by 1, compare n and N in process 117, and perform loop processing Loo
Determine whether p1 has ended. In process 117, n
>N, 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 reads the machining condition data written in the RAM 17 in response to an execution command from the operation panel 11, and controls the operation of the cylindrical grinding machine 1.

The second point will be explained. First, the standard data editing process shown in FIG. 8 consists of processes 201 to 208. Processing 20
1, read the grinding cycle number No. 1, and process 202
Now, initialize the standard data table DB(k, n) with the plane number k t=Ncyc. The process 203 is
D3(k,n) (n = 1.2..., N) is displayed on a display device (not shown) on the operation panel 11 to aid editing.

In process 204, the presence or absence of a modification request is confirmed, and if there is no modification, the process jumps to process 208. If there is correction data, process 204
The process then proceeds to step 205 to read the modified data Den (n). Processing 206 replaces the standard data D, (k, n) with modified data DmD(n), and further processing 207,
The correction results are displayed on a display device (not shown) on the operation panel 11. Process 208 determines whether or not the editing work is to be continued, and if it is to be continued, the process returns to process 201 again.

Next, the editing process of the correction coefficient value table shown in FIG. 9 consists of processes 301 to 310. In process 301, correction coefficient number 1 is read, and in process 302, machining condition number n is set to 1.
Set to . Processes 303 to 309 are repeatedly executed until n exceeds N. In process 303, the correction coefficient value Kl
(J on ) (j=1.2...,j) on the operation panel 1
Display on the display device above 1. 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 corrected data, the process advances from process 304 to process 305, and corrected data KP/DD(j) is read. Process 306 converts the correction coefficient value Ki(j, n) into correction data KMDD(j
), and then in step 307 the correction results are displayed on the operation panel l.
Display on the display device on the computer. Process 308 increments the processing condition number n by 1, and process 309 compares n and N. Process 3
It is determined whether the loop processing from 03 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 the editing work is to be continued, and if it is to be continued, the process returns to processing 301 again.

The standard data or correction coefficient value table is available from RO.
Transfer what is registered on the M 16 or the auxiliary storage device 21 to the RAM 17 (processing flow is not illustrated)
However, it is also possible to edit at this pace, and conversely, the editing results on the RAM 17 can also be registered in the auxiliary storage device 21 via the interface 20.

By adopting the configurations illustrated in FIGS. 5 to 9 above, machining conditions can be automatically generated by inputting several key data without having to input a large amount of machining condition data. The number of man-hours required for inputting processing conditions can be reduced.

Although FIGS. 6 and 7 are illustrated in a general format, in reality, as machining condition data, for example, each variable shown in FIGS. 3 and 4 is defined, and the key The data may include, for example, workpiece shape, material, hardness, roughness, machining allowance, data, 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 machining conditions can be arbitrarily added or deleted depending on various machining conditions.

In addition, since standard machining condition data or correction coefficient value tables can be edited on RAM, it is possible to flexibly deal with workpiece characteristics and various machining constraints.
The operating range of machine tools can be expanded.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the cylindrical grinder, Fig. 2 is a block diagram of the control device of the cylindrical grinder, and Figs. 3 and 4 are one lunge grinding cycle as an example of the processing process by the cylindrical grinder.
The operation diagram for one stage of the traverse grinding cycle, Fig. 5 is a configuration diagram of the processing program according to the present invention, and Fig. 6 is a
A configuration diagram of the automatic construction condition data creation program, Figure 7 is a diagram showing the processing flow of the same program, Figure 8 is a diagram showing the processing flow of the standard data editing program, and Figure 9 is a diagram showing the processing of the correction coefficient value table editing program. It is a figure showing a flow. In the drawings, 1 is a cylindrical grinder, 2 is a grinding wheel, 3j5 is a motor, 4.6 is a feed mechanism, 9 is a workpiece, 11 is an operation panel, 12 is a control device, 13 is a central processing unit, 15.18.19 .20 is ear 7 m - s 1
6 is ROM. 17 is a RAM. Patent applicant: Mitsubishi Heavy Industries, Ltd. Patent attorney, Mitsubishi Heavy Industries, Ltd., Department I (and 1 other person) Figure 7 Figure 8

Claims (1)

[Claims] means for editing standard machining condition data, means for editing a correction coefficient value table, reading machining key data, and using machining cycle numbers in the key data,
A means for setting standard machining condition data, further calculating the sum of correction coefficient values corresponding to a series of key data, and multiplying this by the standard machining condition data to obtain machining condition data, and each of the above means. A numerically controlled machine tool comprising: means for transmitting data for execution.