JPH01164536A - Intermittent working data preparation device for nc machine tool - Google Patents

Abstract

PURPOSE:To automatically prepare the working data for the intermittent formation of chips in the forestage of turning by constituting the subject device from an intermittent working region processing means, intermittent working process processing means, intermittent work tool processing means, intermittent working order processing means, and an intermittent working condition processing means. CONSTITUTION:A material data 21, working drawing data 22, and an allowance part data 34 are read, and an intermittent working region is set. The working processes are divided by using a judgement data 23, having the intermittent working region as the intermittent working regions for the outer periphery, edge surface, and the inner periphery, and the intermittent working region for the inner periphery is set into the working method for the groove working or drilling work. The data for the outer peripheral groove working tool edge surface groove working tool, inner surface groove working tool, and an inner peripheral hole working tool are set by an intermittent working tool judgement processing part 50. The judgement data for the intermittent working order is input, and the intermittent working order in each working process is set. The intermittent working condition is set by using the intermittent working condition data, and the intermittent working data is automatically prepared.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an automatic creation device for NC machining data, and is particularly applicable to an NC machine tool suitable for turning machining in which chips are continuously entangled with machining tools. The present invention relates to an intermittent machining data creation device.

[Prior Art] In recent years, NC machine tools have become increasingly important as a driver of automation in production factories. This means that improvements in processing efficiency and processing quality accompanying automation are always strictly required.

Automated turning processes are particularly prone to many problems caused by chips. In other words, in turning machining, continuous chips generated during machining often become entangled with the machining tool (when the workpiece is a non-ferrous metal material such as pure copper or aluminum, or when machining a long hole, - The layer becomes noticeable.

Conventionally, there have been tools that generate intermittent chips by devising the shape of the cutting edge of a processing tool, but these tools are mainly used for steel materials and are not suitable for the above-mentioned processing. There is also a method of periodically varying the feed rate of the tool post, but problems remain in machining efficiency and machining quality.

[Problem that the invention seeks to solve]

The current state of automation in NC turning machining is problematic in that it reduces machining efficiency and machining quality due to chips.

The present invention aims to solve the above problems.

That is, in the present invention, milling processing (milling processing)
Using a complex NC lathe with additional functions (hereinafter referred to as a turning center), an interactive automatic programming device automatically creates NC machining data for intermittent machining, and before turning the workpiece, Create intermittent machining data for grooving and drilling so that chips are generated intermittently.

(Means for solving the problems) Means for solving the above problems in the present invention are as follows:
The structure of the present invention will be explained with reference to FIG. Intermittent machining process processing means 40 that divides and sets the intermittent machining area into respective machining processes as outer periphery, end face, and inner periphery machining areas according to judgment criteria;
Intermittent machining tool processing means 50 that sets an intermittent machining tool for groove machining and hole machining from machining process data; Intermittent machining order processing means 60 that sets a machining order of divided machining areas based on a criterion for determining the machining order; Intermittent machining of an NC machine tool that includes an intermittent machining condition processing means 70 that sets machining conditions of an interrupted machining tool based on the criteria of machining conditions, and automatically creates machining data that may cause chips to be generated intermittently before turning. The purpose is to provide a data creation device.

[Effect]

Reads the material drawing data, machining drawing data, and margin data and sets the intermittent machining area. Using the judgment data, the machining process is divided into the set interrupted machining area as the outer circumference, end face, and inner circumference intermittent machining area, and for the inner circumference interrupted machining area, either groove machining or hole machining is performed. Set to processing method. The set data is further set in the intermittent machining tool determination processing section as data for the outer circumferential groove machining tool, the end face groove machining tool, the internal groove machining tool, and the inner circumferential hole machining tool. Intermittent machining order determination data is input, and the intermittent machining order of each machining process is set. Intermittent machining conditions required for machining are set using the intermittent machining condition data, and data necessary for NC machining for interrupted machining is automatically created and stored in an intermittent machining data file.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a control block diagram of an intermittent machining data creation device for an NC machine tool embodying the present invention.

FIG. 2 is a block diagram showing the overall configuration of the present invention.

In FIG. 2, the present invention loads a workpiece;
It has a turning center 1 that performs intermittent turning. The turning center 1 is operated according to a central processing section 2 that is connected to an NC machining control section and performs overall control. N.C.
The processing control section includes a turning processing automatic creation section 3 that processes processing data for turning processing, a turning processing data file 4, and an intermittent processing processing section that processes data for intermittent processing that intermittently generates chips before turning processing. An automatic creation section 5, an intermittent machining data file 6, an input/output section 7 that automatically creates various machining data in an interactive format, a machining data exchange section 8 that converts the automatically created machining data into a part program, and an NC. The machine includes an automatic NC cutting program creation device 9 for creating a turning tool program, and the created NC cutting program is supplied to the turning center 1 via a remote buffer 10. Further, control information is transmitted and received to and from the turning center 1 via the programmable controller 11.

The turning center 1 is schematically configured as shown in FIGS. 3 and 4. A workpiece gripped by a chuck (not shown) at the end of the spindle S is rotated at high speed or indexed to a predetermined position by the positioning function (referred to as the C-axis) of the spindle S. A tool rest Tr is provided which is movable in two axis directions X and Z in the figure. By moving the tool rest Tr from the machine origin under numerical control, the processing tool T attached to the tool rest Tr cuts the workpiece to the required dimensions. A disk-shaped turret Th is attached to the tool rest Tr so that it can be rotated and positioned, and about ten processing tools T are accommodated therein. The machining tool T is sequentially indexed to machining positions according to the NC machining program and machining the workpiece. Turning center 1 is
Machining tool T for turning and milling (end mill).

It has a processing tool T for drilling, etc.). In milling, the workpiece is machined while rotating the processing tool T and indexing or positioning the main axis S using the C axis. In turning, the workpiece is machined by rotating the main shaft S while the processing tool T is fixed to the turret Th. If there are many machining tools T required, or if the machining tools T are not in the turret Th for the next machining session, an endless track-shaped tool magazine Mg is attached to the side of the tool rest Tr, and 30 to 40 machining tools can be stored. Since T is prepared in the tool pot PL, ATC (
The twin arm Ar of the automatic tool changer (automatic tool changer) replaces and replenishes unnecessary machining tools in the turret Th.

FIG. 1 is a control block diagram of the intermittent machining data creation device. FIG. 1 shows the input/output section 1, the central processing section 2, and the central processing section 2 in FIG.
Intermittent machining automatic creation section 5. and an intermittent machining data file 6 are the main components.

In FIG. 1, a CPU 2 which is a central processing unit has a display 7 with a keyboard which is an input/output unit and an input/output circuit 7.
connected via a. In addition, various data files 20 necessary for automatically creating intermittent machining data, and an intermittent machining area processing means 30 that input material drawing data and machining drawing data and set a machining area to be subjected to intermittent machining using an intermittent machining setting command. and an intermittent machining process processing means 40 which inputs data and judgment data of the intermittent machining area and divides the machining process into intermittent machining areas of the outer periphery, end face, and inner periphery, and area data and judgment data for each UT continuous machining process. , and an interrupted machining tool processing means 50 that inputs the intermittent machining tool data and sets the intermittent machining tool, inputs the intermittent machining data to which the intermittent machining tool is set, and inputs the judgment data of the interrupted machining order, and sets the intermittent machining order. An intermittent machining order processing means 60 that performs l!
Intermittent machining condition processing means 70 inputs the interrupted machining data in which the I'F continuous machining order is set and the intermittent machining condition data and sets the interrupted machining conditions, and stores the interrupted machining data determined by the above processing. Intermittent machining data file 6
The created intermittent machining data, which is roughly constructed from the following, passes through the machining data converter 8 (FIG. 2) and finally becomes data of an NC program.

FIG. 6 is a flowchart showing the operating procedure of the above device. Hereinafter, the above device will be explained in detail according to the operating procedure.

At the 0th stage of the operation, the operation is first started by an intermittent machining setting command using the display 7 with a keyboard.

When the operation is started, material drawing data as shown in FIG. 5(a) and processing drawing data as shown in FIG. 5(b) are read. These data are stored in advance in the material drawing data file 21 and processing drawing data file 22 in FIG. In FIGS. 5(a) and 5(b), the workpiece is a round material, and the upper half from the central axis CL is shown.

The processing drawing data is the final finished shape of the workpiece, and the material drawing data is the material shape before processing. These data can be displayed on the screen on a display 7 with a keyboard. In the turning processing area processing setting section 31, as shown in FIG. 5(C), the material drawing data and the processing drawing data are superimposed, and the processing area to be removed by turning, that is, the turning processing area is set. . Next, in the interrupted machining area processing section 32, as shown in FIG.
Areas unrelated to the intermittent machining area, such as the groove g, or the chamfer m on the inner periphery, are pinked up from each machining element and changed to the area shown by the chain line.

In the 0th stage of operation, the margin a in the margin data memory 34 is
As shown in FIG. 5(e), an allowance a for rough machining is given to the final finished shape, and an intermittent machining area M is set.

The data processed as described above is set in the intermittent machining area setting section 33 at the 0th stage of the operation.

As the 0th stage of the operation, the intermittent machining process is started. That is, as shown in FIG. 5(f), the machining process is divided and set as the intermittent machining area Ma on the outer periphery (stage 0 of the operation), and the intermittent machining area M is set as the intermittent machining area Ma on the outer periphery. After determining whether it is machining (stage 0 of the operation), the machining process is divided and set as an intermittent machining area Mb of the end face (
(0th stage of operation) and dividing and setting the machining process by setting the intermittent machining area M as the inner circumferential intermittent machining area tvfc (0th stage of operation). In addition, each interrupted processing area Ma,
Since Mb and Mc are milling processing regions before turning, they each have overlapping processing regions.

In other words, since milling is a part of the work, there are parts that are cut by turning and parts that are not.

The determination of the intermittent machining process in stage (1) and stage 0 of the operation is performed by the intermittent machining process determining section 41 shown in FIG. The determination of the intermittent machining process is performed based on the determination data input from the determination data file 23. Figure 7 shows the outer periphery intermittent machining area (Figure 7 (a)) based on the judgment data.
FIG. 7 is an explanatory diagram showing the criteria for determining the end face interrupted processing area (FIG. 7(b)) and the inner periphery interrupted processing area (FIG. 7(C)). Figure 7(a) is a diagram showing the criteria for determining the outer periphery.
From the X-coordinate point P of the material shape located at the same position as the point P1' of the maximum X-coordinate value of the machining element at the maximum coordinate value Zmax, move clockwise from the X-coordinate point P of the machining element at the minimum Z-coordinate value Zmin of the machining shape. X of the material shape located at the same position as the maximum value point p%
The machining area between the contour up to the coordinate point P2 and the material shape is defined as an outer circumferential intermittent machining area Ma.

FIG. 7(b) is a diagram showing the criteria for determining an end face, which is between a machining element having the maximum Z coordinate value Z'may of the machining shape and a material element having the maximum Z coordinate value Zmax of the material shape. The machining area is defined as an end face intermittent machining area ~1b.

FIG. 7(C) is a diagram showing the criteria for determining the inner circumference, where the X-coordinate point P of the material shape is located at the same position as the point P1' of the minimum X-coordinate value of the machining element located at the maximum Z-coordinate value Zmax of the machining shape. ,from,
Machining between the outline of the material shape and the point P2 of the material shape located at the same position as the point p2' of the maximum The area is defined as an inner circumferential intermittent machining area Mc.

In FIG. 1, the outer periphery interrupted machining area determined by the interrupted machining process determination section 41 is set by the outer periphery interrupted machining area setting section 42. The determined end face interrupted machining area is set by the end face interrupted machining area setting unit 43. Further, the determined inner circumference intermittent machining area is set by the inner circumference intermittent machining area setting section 44.

As the 0th stage of operation, the inner circumferential intermittent machining area is set as follows:
The inner circumference intermittent machining method determining section 45 determines the machining method. In other words, the inner periphery interrupted machining area is cut with a groove machining tool (
Determine whether to perform the process using an end mill (end milling) or a hole processing tool (drilling). In Fig. 1O, regarding the machining length l and machining diameter d of the inner circumferential intermittent machining area,
Judgment is made using the following equation using a length constant of 2 prepared for each workpiece material registered as judgment data and a diameter constant kd.

! >k2 and d<kd, hole machining with drill DR (Fig. 10(a), (b)); otherwise, groove machining with end mill En (Fig. 10(C)).

(d)).

Phase [phase] of operation, 0,0. In the [phase] stage, a determination process is performed to set the machining tool for each machining process. These are the outer periphery groove machining tool determination processing section 46 in FIG.
．． End face groove machining tool determination processing section 47. This is performed by the inner circumferential groove machining tool determination processing section 48a and the inner circumferential hole machining tool determination processing section 48b. The data of the intermittent machining tool data file 24 is input, and the T code, tool type, tool diameter, machinable length, applicable workpiece material, etc. are used.

FIGS. 8(a) and 8(b) are explanatory diagrams when the outer circumferential interrupted machining area Ma is machined by the outer circumferential groove machining tool EN. Intermittent machining of the outer periphery is performed by grooving in the -Z force direction, but the machining length T of the tool and the machining depth L are Tffi>Il, and the outer periphery tool is registered as the machining diameter d and tool diameter Td as judgment data. A machining tool whose setting constant is 1 and satisfies d/Td>K is applied.

FIGS. 9(a) and 9(b) are explanatory diagrams in the case of machining the end face interrupted machining region Mb by the end face groove machining tool E. In the end face interrupted machining, groove machining is performed in the -X direction.

The determination conditions are Tff>t and d/Td>Kz (end face tool setting constant).

FIGS. 10(a) and 10(b) are explanatory views when machining the inner periphery interrupted machining area Mc with the inner periphery hole machining tool DR, and FIGS. Peripheral groove machining tool E
FIG. 3 is an explanatory diagram when machining the inner periphery intermittent machining region Mc by N. The judgment condition is d/Td>K in all cases.

(inner circumference tool setting constant).

In each determination processing unit 46, 47.48a, and 48b,
Furthermore, consideration is being given to machining a plurality of times depending on the machining direction dr and the machining depth L, and to machining a plurality of grooves and holes depending on the machining diameter d.

In the 0th stage of operation, the data of the intermittent machining tool that has been subjected to the determination process described above is set in the intermittent machining tool setting section 49.

Next, as the 0th stage of operation, the intermittent machining order of each machining area is set. In the intermittent machining order processing section 61 of FIG. 1, machining order processing is performed based on determination data. The processing order is determined according to the priority order: 1. Outer periphery groove processing, 2.
End face groove processing, 3. Inner circumferential groove machining, 4. This is processed as inner circumferential hole machining and is set by the intermittent machining order setting unit 62.

In the 0th stage of operation, intermittent machining conditions for each machining area are set. The intermittent machining conditions are set in the intermittent machining condition processing section 71 based on the condition data of the intermittent machining condition data file 25. The processing condition data includes the material of the workpiece,
For each type of tool and type of machining process such as outer periphery, end face, and inner periphery interrupted machining, the cutting speed V and the feed amount per one revolution of the tool are [. Also, the necessity of coolant, the clearance I (C, -Cb) as shown in FIG. 10, etc.

The number of revolutions per minute N of the tool and the feed rate F of the tool are N=V
/π-Td, F=N-rT: Find. Td is the tool diameter shown in FIG.

The processing data processed as described above is set in the interrupted processing condition setting section 72 and stored in the interrupted processing data file 6 set by a series of processes.

〔Effect of the invention〕

As explained above, according to the present invention, using a turning center equipped with a pre-milling function, groove machining can be performed before turning a workpiece by automatic programming for interactive interrupted machining of the device of the present invention. It is now possible to automatically insert and drill machining, and it is now possible to generate chips intermittently.

Therefore, chips during turning do not get tangled with the machining tool, which eliminates problems in automation, and there is no need for new equipment or special treatment for the cutting tool, all within the cutting program. Since we were able to solve this problem, we were able to improve machining efficiency and, in turn, improve machining quality. Furthermore, safety during processing was also compromised.

[Brief explanation of the drawing]

FIG. 1 is a control block diagram of an embodiment according to the present invention, and FIG.
The figure is a block diagram showing the overall configuration of the present invention, FIGS. 3 and 4 are schematic configuration diagrams of a turning center, and FIG.
) to (f) are explanatory diagrams showing the processing process of the intermittent machining area, FIG. 6 is an operation flowchart of the embodiment, and FIG. 7(a) to
(C) is an explanatory diagram showing criteria for determination data, No. 811 (a)
), (b) is an explanatory diagram of outer peripheral machining, Fig. 9 (a)
, (b) is an explanatory diagram of end face processing, Fig. 10 (a)
-(d) are explanatory diagrams of inner circumferential machining. 1... Turning center 2... Central processing unit (CPU) 5... Intermittent machining automatic creation unit 6... Intermittent machining data file 20... Various data files 30... Intermittent machining area processing means 40...Intermittent machining process processing means 50...Intermittent machining tool processing means 60...Intermittent machining order processing means 70...[lJrContinuous machining condition processing means Figure 8Figure 8(b)

Claims (1)

[Claims] In a control device for a complex NC lathe having a milling function, an interrupted machining area processing means sets a machining area to be subjected to interrupted machining using material drawing data and machining drawing data read from a data file; Intermittent machining process processing means that divides the machining area into outer circumference, end face, and inner circumference machining areas according to judgment criteria and sets each machining process, and an intermittent machining process that sets intermittent machining tools for groove machining and hole machining from machining tool data. A machining tool processing means, an interrupted machining order processing means that sets the machining order of the divided machining areas based on the machining order judgment criteria, and an interrupted machining condition processing means that sets the machining conditions of the interrupted machining tool based on the machining condition judgment criteria. An intermittent machining data creation device for an NC machine tool that automatically creates machining data for pre-machining in which chips may be generated intermittently before turning.