JPH03147004A - Setting method for working condition - Google Patents

Abstract

PURPOSE:To set a working condition except for a data base by selecting a working speed in respective working parts among the registration working speeding of the working condition data base so as to add to working shape data. CONSTITUTION:Prior to working, working shape data where coordinate value data of X, Y and Z axes and the attitude angle of a working head are taught is called. Then, a working shape and working accuracy are considered, the arbitrary working speed fitted to respective working parts is added to working form data so as to generate a program for working, and it is stored in the memory of an NC control part. Then, the quality and the board thickness of work and designated and the working condition data base is called. The designated working speed and the registered working speed are referred. When the designated working speed is smaller than the minimum value of the registered working speed or larger than a maximum value, two registered working speeds which are the nearest to the designated working speed are selected.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for setting machining conditions for an electric machining device that processes a workpiece using a wire electrode or the like, and particularly to a method for setting arbitrary machining conditions other than those in a machining condition database registered in advance.

[Conventional technology]

Examples of electrical machining devices include laser machining devices, die-sinking electric discharge machining devices, wire electric discharge machining devices, and the like (known among others); however, a three-dimensional laser machining device will be explained here as an example.

A laser processing device mainly includes an optical path system for guiding laser light, a processing machine main body having a drive system, and a control device that outputs the laser light and operates the processing machine according to a program. The processing machine main body has three orthogonal axes (X, Y, Z
) and two axes of rotation and rotation (α, β) that determine the attitude of the processing head, which has a lens for focusing the laser beam.By controlling these, three-dimensional workpieces can be processed. This makes it possible to process any shape.

In order to perform laser processing, processing shape data (i.e., point data), which is operation locus data of the processing machine to stop the desired processing shape, and data necessary for performing good processing, A machining program is required that includes data on machining conditions such as the material of the target workpiece, machining speed relative to plate thickness, laser output, laser output form (continuous output/pulse output), type and pressure of machining assist gas. be. In addition.

The data for various machining conditions are tested in advance and the conditions that result in the best machining are set as a database, and the operator (operator) selects any machining condition from this database taking machining accuracy into consideration. I will do it.

Here, in Fig. 4, which explains the configuration of a general three-dimensional laser processing device, (1) is a processing head that irradiates a processing line K on the workpiece with laser light, and (7) is α, which will be described later. , β, and the arm consisting of the Z axis, (11)? ! The processing machine body, which has several drive shafts and motors, (process 2) is C
An NC control unit that is equipped with a PU, memory, etc., and outputs a signal M that drives the processing machine main body (11) based on instructions from the machine program, and a signal N that controls processing conditions such as the output of the laser oscillator (13). A database of machining shape data and machining conditions of the machining IK is stored. (14)
is an operation unit equipped with operation switches, etc., and allows initial settings and operation commands of the Kani program to be manually operated by the NC control unit (1).
2). (15) is a teaching box that inputs drive commands and the like for the processing machine main body (11) to the NC control section (12) and creates processing programs.

Next, the shaft configuration of the processing machine main body (11) will be explained with reference to FIG. In the figure, (8) is the β axis located at the driving end of the arm (7), (9) is the α axis connected to the β axis (8),
(101 is the Z axis connected to the α axis (9), and these constitute the arm (7).
) is attached to the tip of the β axis (8) and is controlled to move along the machining line K on the workpiece W. (
2) is a β bearing that rotates the motor (M5) i (8) in the direction of the arrow β (31!f motor IM4)
an α bearing that rotates the α axis (9) once in the direction of the arrow;
(4) is a Z bearing that moves the processing head (1) in the direction of arrow Z by the motor (M3), (5) is a Y bearing that moves the processing head (1) in the direction of arrow Y by the motor (■2), ( 6) is an X bearing that moves the machining head (1) in the direction of the arrow X by the motor (1).

The above motors (Ml) to (■5) are controlled by the NC control section (
It is driven by the drive signal M from 12), and the laser beam spot traces the machining line K while keeping the distance of the machining head (11) relative to the workpiece W constant according to the machine program. is controlled so that it is approximately perpendicular to the surface of the workpiece W.

Next, a method for setting processing conditions in laser processing will be described. First, in machining, it is necessary to create a machining program by combining machining shape data in which the locus of the machining line is taught and data on various machining conditions.

In this machining program, the operator creates the machining machine main body (11) using the teaching box (15) along the machining line K on the workpiece V, and the attitude angle (α,
Teaching the 5 axes including β): Create large machining pressure data using Koyo. Operate the actual machine based on the program to check whether machining is possible, and if there are any problems, correct the data.

Figure 2 is a database of processing conditions in which processing conditions corresponding to the material and thickness of the workpiece are set; in this example,
Machining speed, laser output, frequency, duty, and assist gas pressure required when machining a workpiece of material 5PC1 plate thickness 1.2mff+.

Processing conditions such as gas type and viasing time are registered.

In addition, in the figure, "L"' in the gas pressure column indicates that the pressure of the assist gas is low, "1" indicates that the pressure is high, and "2" in the gas type column indicates that the assist gas is low. indicates that it is oxygen.

The database of processing conditions includes lfI materials.

Approximately 10 conditions x 10 items (in the example of Fig. 2, 7 conditions x 8 items) are set corresponding to the plate thickness, and the NC control unit (12) also performs the above-mentioned operations depending on the memory capacity. It is possible to store approximately 10 to 100 machining condition databases.

Next, a method for creating a machining program using a pre-registered machining condition database will be explained using the flow diagram of FIG.

First, a total of five axes, including coordinate value data of the X, Y, and Z axes and attitude angles (α, β) of the machining head, are taught to create machining shape data (step 16). Next, the material and plate thickness (e.g. SPC
, 1, 2+nff1) to call up the machining condition database stored in the NC control unit (12). Step 17): Select a machining condition database suitable for machining from the machining condition database while considering the speed limit of each machining axis. Set the machining speed (step 18).

As a result, a machining program in which machining conditions are added to the machining shape data is completed and stored in the NC control section (12) (step 19).

Here, the method of setting the machining speed shown in step 18 in FIG. 6 will be specifically explained. Generally, limits are set for the speed of movement and rotation of each axis of a processing machine. Now 1. For example, the speed limit of the processing machine is 5000a++n
/win, when machining using the machining condition database shown in Figure 2, if the machining speed to obtain the desired machining accuracy is 3500w+m/11in, the speed #7 of 3000+eg+/ from the machining condition database.
Select gin.

In addition, if the machining shape is complex and the speed limit of the axis for machining that part is 300a+m/ffl1n, and you want to machine the above machining part at a speed of 250 vats/min, select speed #2 from the machining condition database. 10
0 f1w+/+nin will be selected.

That is, since the machining speed in laser machining is determined by the machining accuracy and machining shape required for machining, the desired machining speed and the machining speed registered in the machining condition data table do not necessarily match. In this case, if you select a registered machining speed that is higher than the desired machining speed and perform machining, the machining accuracy will decrease or the machining head will malfunction. The registered machining speed is selected and this is set as the machining speed. Note that if a machining speed other than that registered in the machining condition table is set, a setting error will occur and machining will not be possible.

As described above, the machining speed for each machining section is selected from among the machining speeds registered in the machining condition database and added to the machining shape data.

The laser machining program is completed, and the predetermined laser machining is performed according to this Niprogram.

[Problem to be solved by the invention]

As described above, the conventional machining condition setting method is that when setting a machining speed other than the machining speed registered in the machining condition database, always select a registered machining speed from the database that is lower than the specified machining speed. As a result, the machining speed of the entire machining process decreases, resulting in a significant increase in machining time.

Furthermore, since there is a limit to the number of machining speeds registered in the machining condition database, there is a large difference between the registered machining speeds. Therefore, the difference in the selected machining speeds naturally becomes large, and as a result, the actual machining conditions change rapidly, resulting in problems such as deterioration of machining quality.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a machining condition setting method that allows machining conditions other than those in a machining condition database to be set.

[Means for Solving the Problems] In the machining condition setting method according to the present invention, when setting any machining condition data other than machining condition data registered in a machining condition database, any machining condition data is registered as a registered machining condition. If it is less than the minimum value or more than the maximum value of the data, select two registered machining condition data that approximate the arbitrary machining condition data, and if the arbitrary machining condition data is within the range of the two registered machining condition data. By selecting registered machining condition data before and after any machining condition data and performing interpolation calculations based on the two selected registered machining condition data, various machining condition data corresponding to any machining condition data can be set. It was designed to do so.

[Effect]

In this invention, arbitrary machining condition data and registered data in a machining condition database are compared. Then, according to the result, two predetermined pieces of registered data are selected from among the registered data, and interpolation calculation is performed based on the selected two pieces of registered data.

[Embodiments of the invention]

An embodiment of the present invention will be described below, but the configuration of the laser processing device and the processing axis is the same as the conventional one shown in FIGS. 4 and 5, so the explanation will be omitted.

In this invention, when a machining speed that is not registered in the machining condition database is specified, two predetermined machining speeds are selected from among the machining speeds registered in the machining condition database, and the machining condition data of these two registered machining speeds is used. By doing interpolation calculations based on.

This is to set the machining conditions for the specified machining speed. Note that these processes are carried out by the N
This is done in the C control section (Engine 2).

Next, a method for setting arbitrary machining conditions using a machining condition database as shown in FIG. 2 will be specifically explained with reference to the flowchart of FIG. 1.

First, prior to machining, step 20) calls up machining shape data (point data) in which the coordinate value data of the x, y, and z axes and the attitude angle (α, β) of the machining head are taught;
Next, considering the machining shape and machining accuracy, a machining program is created by adding an arbitrary machining speed suitable for each machining part to the machining shape data, and this is stored in the memory of the NC control unit (12). (Steps 21 and 22) When machining according to this kind of machine program, ■First, the material and thickness of the workpiece (for example, 5PC11, 2m
III/ff110) and call up the machining conditions database shown in Fig. 2 (step 23) ■Next,
Compare the specified machining speed set in the cannibal program with the registered machining speed in the machining condition data table. (Step 24) ■As a result, if the specified machining speed is smaller than the minimum value of registered machining speeds or larger than the maximum value of registered machining speeds,
Two registered machining speeds closest to the specified machining speed are selected from among the registered machining speeds. (Step 25) In other words, if the specified machining speed is 10mm/+nin (or 6000me/sin), 11005x/win and 300 am/gi are selected from the registered machining speeds.
in (or 3000EllI/min and 500[
1mw/sin) will be selected.

At this time, in the database shown in FIG. 2, the registered machining speed "0" is the minimum value, but since this is for drilling (biasing) at the machining start point, it is excluded from selection.

■Also. If the designated machining speed is within the range of registered machining speeds, two registered machining speeds before and after the designated machining speed are selected from among the registered machining speeds. (Step 26) For example, if the specified machining speed is 400111111/ILI
If it is in, the registered processing speed is 300 mwl/wi
Since these two registered machining speeds are within the range of n and 500 + na/gin, these two registered machining speeds are selected.

(2) Then, interpolation calculation is performed by interpolating or extrapolating the machining conditions of the two registered speeds selected in steps 25 and 26.

(Step 27) Here, the registered processing speed F n (mwl/a+in), laser output S (w), pulse frequency B (H2), and pulse duty (%) are used as processing conditions to be interpolated or extrapolated. I am using it.

Hereinafter, the interpolation calculation method of machining speed exemplified in (1) and (2) above will be specifically described.

a. When the specified machining speed is lo+nm/gain (F), the registered machining speed selected is 100 mv/l1
lin (Fs) and 30 mouths ■/l! Iin (F31, so if you extrapolate these processing conditions and calculate by interpolation, to + to -10 1oo-3oo (10-100) = lO (%),
Processing condition data of a specified processing speed of 10+nan/min, a laser output of 36.5 W, a pulse frequency of 200H2, and a pulse duty of 10% will be obtained.

In addition, the gas pressure and gas type that are processing conditions other than these are #
2 (registered machining speed 100) is selected.

b, Specified machining speed is 6000son/llll1n f
F], the registered machining speed selected is 3 (100m+
n/ll1n (Ftl and 5000aon/aki
n (Fs), so by extrapolating these machining conditions and performing interpolation calculations, the specified machining speed becomes 6000nllI/akin
laser output 575W, pulse frequency 1000)
(Processing condition data of Z and pulse duty of 100% are obtained.

Note that data of #8 (registered processing speed 5ooo) is selected as the gas pressure and gas type in this case.

C1 specified machining speed is 400 +++++n/a+in (
F), the registered processing speed selected is 300 rnt
n/min (Fx> and 5o.

+nm/min fF41, so if these processing conditions are interpolated and the interpolation calculation is performed.

1O-12 (480-300) = 11f%)” ”
300-500, laser output 100 W, pulse frequency 25OH2 at specified processing speed 400 errs/akin
and machining condition data with a nozzle duty of 11%.

In this case, data #4 (registered processing speed 500) is selected as the gas pressure and gas type.

(2) Finally, based on the calculation results in step 27, processing conditions such as laser output, pulse frequency, pulse duty, gas pressure, and gas type are set corresponding to the designated processing speed. (Step 28) If the specified machining speed matches the registered machining speed in the machining condition database as a result of checking in step 24 of the above process, the machining conditions of the matching registered machining speed are used as the machining conditions of the specified machining speed. You will need to set it. Also 1
Processing steps 23 to 28 as described above are performed in real time during processing.

As described above, when any machining speed other than the machining speed registered in the machining condition database is specified, various types of machining speeds for the specified machining speed are selected by selecting two predetermined registered machining speeds and performing interpolation calculations. Since the machining conditions are set, it is possible to set the optimal machining speed according to the machining shape, and unlike the conventional method, the operator can check whether the machining speed is registered in the machining condition database. = You can omit the trouble of checking each one. Also.

The machining speed changes sequentially depending on the shape to be machined.

It becomes possible to perform continuous machining without any machining speed setting errors.

By the way, in the above embodiment, a method for setting arbitrary machining conditions using a machining condition database in laser machining has been explained. Even in this case, the same effects as in the above embodiment can be obtained.

Further, in the above embodiment, various machining conditions are set for the specified machining speed, but other machining conditions may be used as the specified target (.

It is not particularly limited to the processing speed.

〔Effect of the invention〕

As described above, according to the present invention, when setting Ig machining condition data other than machining condition data registered in the machining condition database, any machining condition data is less than or equal to the minimum value or the maximum value of the registered machining condition data. In the above cases, select two registered machining condition data that approximate the arbitrary machining condition data, and if the arbitrary machining condition data is within the range of the two registered machining condition data, register before and after the arbitrary machining condition data. By selecting machining condition data and performing interpolation calculations based on the two selected registered machining condition data, various machining condition data corresponding to any machining condition data can be set. Regardless of the shape, optimal machining conditions can be set for each machined part, which has the effect of shortening machining time and improving machining quality.

[Brief explanation of the drawing]

Fig. 1 is a flowchart of a processing condition setting method according to an embodiment of the present invention, Figs. 6 is a configuration diagram of each axis of a laser processing machine, and FIG. 6 is a flowchart of a conventional method of setting processing conditions.

Claims (1)

[Claims] When setting any machining condition data other than the machining condition data registered in the above database using a database in which various machining condition data are registered, the optional machining condition data must be less than or equal to the minimum value of the registered machining condition data. When the maximum value is exceeded, two registered machining condition data that approximate the arbitrary machining condition data are selected, and when the arbitrary machining condition data is within the range of the two registered machining condition data, the data before and after the arbitrary machining condition data are selected. Select the registered machining condition data,
A machining condition setting method characterized by setting various machining condition data corresponding to arbitrary machining condition data by performing interpolation calculation based on two selected registered machining condition data.