JPH01321110A - Cut-in shaft control method for v-form groove processing machine - Google Patents

Abstract

PURPOSE:To prevent interference of a machining tool with a work table caused by carelessness at the time of cut-in shaft control by prohibiting automatic operation in regions outside the safe region, where no interference occurs with the work table, and by disengaging the prohibition when a regular part-program is used. CONSTITUTION:In an NC device according to existing invention, servo motors Mx (not illustrated), MY, MZ are driven, and a plate grasped by a work clamping device 33 is moved by a Y-axis carriage 35 along the Y-axis at any speed under control to be positioned any desired, while a cutting tool 53 is moved by a slider 41 and a cutting head 45 in the X and Z directions at any speed under control to be located any desired. Therein a safe region is set, where no interference occurs with a work table 11 even though the longest tool 53 is loaded, and into a macro-program in the NC device, a program is intered, which is to insert a code as long as the part program is normal. If a start button is pushed an code insert is made at the head of the part program, this program concerned shall be implemented to the last, and stop is made at the point of origin, and if there is no insertion, judgement is made whether or not it is within the safe region to result in emission of alarm in the case of 'off', and stop is made.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to V-shaped groove machining and Akebono's cutting axis control method.
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(Prior Art) Conventionally, as a pre-processing for bending, a high-surface V-shaped groove has been formed in a bent portion.

However, when machining V-shaped grooves using a general-purpose machine such as a shaver, it is inconvenient that it is not possible to perform special machining such as starting cutting in the middle of the plate material or ending cutting in the middle of the plate H. There is.

Accordingly, the present inventors are currently developing a special machine for machining V-shaped grooves that can precisely control a cutting axis equipped with a cutting tool.

(Problem to be solved by the invention) However, in the special machine under development, the cutting axis was
When I tried to control it like this, the knee glance F-! Since you will have to drive the cutting axis while exchanging the cutting tool, you will need to use Knee IJ! There is a risk of interference between the cutting tool and the work table due to carelessness on the part of the operator.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method of controlling a V-shaped groove machining machine that prevents interference between a cutting tool and a work table due to carelessness on the part of the user.

[Structure of the Invention] (Means for Solving the Problems) A control method for a V-shaped groove machining machine of the present invention that solves the above problems is as shown in an outline in FIG. The cutting tool 39 (pigeon 53) has a cutting axis Z that allows the cutting tool 39 (pigeon 53) to move toward and away from the plate material W that has been cut. +! In a cutting axis υ control method for a V-shaped groove machining machine that processes a V-shaped groove, a safety area 1asT8 is defined for the cutting axis in which any cutting tool does not interfere with the work table 11, and generally In addition to prohibiting automatic operation in the STA outside the safety area, when the input part program is a regular b, the macro program 07G of the NC device 67 is executed.
Accordingly, codes C1 and C2 to release the prohibition are inserted into the part program while the part program is being executed, and the prohibition is canceled while the regular bar 1 program is being executed.

(Function) With the above configuration, the V-shaped groove processing machine of the present invention has
In the I+1 method, generally all cutting tools are provided with
Automatic operation is prohibited in the nblt (non-safety area), and this prohibition is canceled in the regular part program, so there is no risk of interference between the cutting tool and the work table during automatic operation using the non-regular part program. .

(Example) Referring to FIGS. 2 to 4, the full-processing machine 1 used in this example is oriented in the left-right direction (in FIG. 4, in the surface direction of the paper).
A box-shaped lower frame 3 extending relatively long is provided.
3. Left and right steel plates 5 are erected on both the left and right 1lIII portions of the lower frame 3, respectively. The upper parts of the left and right side plates 5 are integrally connected by a vertical intermediate frame 7, and are also connected to each other by a suitable connecting plate 9.

A work table 1 is mounted on the lower frame 3 to support the plate material W to be processed (not shown in FIGS. 2 to 4).
1 is attached to the work table 11, and an auxiliary table 13 for supporting the plate material W of the work table 11 is attached to the work table 11.

Furthermore, a plurality of brackets 1 to 15 are installed at appropriate intervals on the intrusion side of the lower frame 3 (-1'G-J). Distributed in advance.
A guide rail 19 is provided extending to a position close to the table 11, and this guide rail 19 has a Y-axis neck for gripping the plate W and positioning it in the rear direction (Y7J direction). The device is supported.

tl-Muwara, a gearbox 21 is disposed on each of the two intermediate pedestals of the pedestal 17, and a ball screw 27 is installed between the bearing 23 of the gearbox 21 and the bearing 25 of the front l1III. is rotatably supported. Both gearboxes 21 incorporate an appropriate connecting rock structure for interlockingly rotating both ball screws 25. A pulley 29 is fixed to the rear end of the right ball screw 27, and the pulley 29 is rotatably connected to the revo motor MY fixed to the bracket 15 via a timing bell 1-31.

Roughly, a Y-axis gear ridge 35 provided with a plurality of hinge clamps $4ia33 is supported on the guide rail 19 so as to be movable in the front-back direction. Further, a nut member 37 that is screwed into and engaged with the ball screw 27 is attached below the ridge 35 of the key 11.

Therefore, the servo motor MY is driven and the ball screw 27 is
By rotating in an appropriate direction, the carriage 35 can be moved back and forth.

In other words, the plate held by the work clamp @433 +
4 It is possible to position at any position using W as the Y axis.

To form a V-shaped groove on the upper surface of the plate material W positioned by the Y-axis necking device, a machining head 41 equipped with a cutting tool 39 is installed above the work table 11. Z-axis and X-axis positioning that allows you to freely adjust the position in the vertical direction (Z direction) and move freely in the left and right direction! A@ is provided.

More specifically, a guide rail 43 extending in the left-right direction is attached to the intermediate frame 7, and an X-axis key 11 ridge 45 supporting the processing head 41 vertically movably is supported on this guide rail 43. There is. Carriage 4
5 in the left-right direction, a ball screw 47 parallel to the guide rail 43 is provided on the left and right side plates 5.

One end of this ball screw 47 is connected via an appropriate coupling mechanism such as a robot motor Mx (not shown), and is screwed into a nut member (not shown) provided inside the key ridge 45. Therefore, by driving the y-bo motor Mx, the pole screw 47 is rotated, and the x-axis gear ridge 45 is moved to an arbitrary position at an arbitrary speed.
, can be done.

Further, the upper end of the processing head 41 is provided with an appropriate gear V.
A ball screw 51 is rotatably supported, the ball screw 51 being connected to the robot motor MZ through the screwdriver and having its intermediate portion screwed into a nut member 49 fixed to the key 11 ridge 45. Therefore, by driving the servo motor Mz, the processing head 41 equipped with the cutting shell 39 at the lower end can be moved to an arbitrary height at an arbitrary speed.

In this embodiment, there are a plurality of cutting tools 39 (five).
This tool consists of a cutting tool 53 and a cutting tool holder 55 that integrally connects these cutting tools 53.The tip of the cutting tool 53 is formed in a V-shape. Are each of the above-mentioned cutting tools 53 placed in the cutting tool holder 55? q It is installed in a removable and position adjustable manner. Kinomi/Jl! For example, in J3, a groove is formed on the upper surface of the plate W, and the groove protrudes downward toward the rear so that the succeeding cutting tool cuts deeper than the preceding cutting tool.

Therefore, when grooving the plate 44W, each bite 5
The resistance acting on 3 is small. Further, deep grooves can be processed with one stroke of the processing head 41.

In order to firmly fix the plate material W to the work table 11 after positioning the plate material W, a temporary press λ device 457 is provided at the lower part of the intermediate frame 7.

In addition, the temporary holding device 457 detects this defect and presses the plate material W.
A plate thickness detector St (see Fig. 5) is attached to detect the thickness of the plate @W in the pressed state.

Therefore, by operating the temporary holding device 57 using, for example, a pneumatic cylinder and pressing the arm tip of the device 57 against the upper surface of the workpiece W, the workpiece W can be firmly fixed on the upper surface side of the work table 11. Further, the plate thickness i can be detected while the plate material W is being pressed.

In order to prevent the X-axis ball screw 47 from being compressed by the weight of the X-axis kill/ridge 45 and the machining head 41, the ball screw 47 is usually supported from below and the machining head 41 is not allowed to pass through the ball screw 47. When the time comes, turn I2 back to the superior side to prevent interference with the machining head 41 with a screw support that costs N$! 259
A plurality of are provided at appropriate intervals in the left and right direction. Therefore, when moving the processing head 41 in the left-right direction, the cutting tool 53
The height is very different! FIJJ never happens.

, l: Grooving] On the side surface of the upper frame 5 on the right side of the second rock 1, a horizontal part is raised higher than the height of the upper frame 5, and one end of an arm 61 in the shape of a reverse turn is rotatable at an allowable angle. The other end of the arm 61 is provided with an operation panel 63 that is rotatable by an allowable angle around a vertical axis. Therefore, the operation panel 63 can be moved left and right within a range of 1 inch, and the operation surface can be moved in a direction that is easy for the operator to see.

Referring to FIG. 5, the control device ff165 has a Mac! 21 Program 67C/j: (lirae/, 1:
It is composed of an NC device 67 as one unit, and includes the aforementioned operation panel 63 and each motor Mx, Mv, M7.
．． Drive! 11I drivers l)x, DY, Dz, and input/output interfaces (69.71) are connected.

The macro program 67G contains the input bar I.
When the program is regular 6, I! I] t5, as long as it is of the type that follows step 71, in order to enable the cutting tool 39 to operate even in non-safety areas, insert the code C1 (preparation code) at the beginning of the cutting tool 39, and then insert the latch code C1x at the end. There is a built-in program to insert code C2. Each motor Mx, MY, MZ is equipped with a position detector EX, EY, E that detects the result of its operation.
Z and speed detectors TGx, TGY, -rGz are connected.

The input interface 69 is connected to the plate thickness, and the output interface 71 is connected to a solenoid 5OL1. 8012.8013
is connected.

With the above configuration, the NG device 67 includes the revo motor Mx,
Drive MY, Mz, Y axis 4; V ridge 35, x@
Ki11 Ridge 45. Each processing head 41 can be controlled to an arbitrary position at an arbitrary speed. In other words, Y
Workpiece clamp aAIi by driving the shaft ridge 35
The pressurizing position of the plate UW held by the ff33 can be positioned directly below the cutting tool 53. Also, X-axis key iI ridge 4
5 and the processing head 41, the cutting tool 53 is moved in the X-axis direction while controlling the processing head 41 to a predetermined height W.
can be done. Roughly, it is also possible to move the Y-axis kittridge 35 and simultaneously raise the cutting tool 53.

Next, a control formula for the cutting axis (Z-axis) will be shown using the flowchart 1 in FIG. 6 and the time chart in FIG. 7.

First, as a prerequisite for performing wood a and II control, a cutting tool 53 arbitrarily selected by the cord is attached to the processing head 41 located above the work table 11.

Therefore, a safety area STΔ is set in which even if the best cutting tool 53 is installed, it will not interfere with the work table 11.

Further, the macro program 67C of the NG device 67 includes:
It is determined whether the input part program is a regular one as indicated in the work procedure manual, and if it is a regular one, a so-called preparation code (M code) C1 is inserted at the beginning, and then a latch code is inserted. A program for inserting the auxiliary code C1x and inserting the code C2 at the end is stored.

So, myself! When the iJ+ driving mode is selected and the start button is pressed, in step 601 of flowchart 1, not shown in FIG. If it has been inserted, the process moves to step 606, and if it has not been inserted, the process moves to step 602.

In snap 602, the code C1 is not inserted, so it is determined whether or not it is within the safety area STA in step 603, and if it is outside the safety area 1jl STA, an NG alarm is output in step 604, and the process proceeds to step 604. 60
The initial operation will be suspended at 5.

On the other hand, on the step 606 side, code C1 is inserted and C
Therefore, the part program is executed to the end, and in step 607, =1-doC2 is recognized, and the movement is stopped at the origin position.

A specific example of the above process 111 is shown in FIG.
In the self-help operation upper mode (AUTM), during automatic operation (OP), the predetermined flag is set until the end code (C2) is output with the latch river assistance code (C1x) due to the first code (C1). was erected, and during this period the Anzenryo [(,
Automatic operation stops even if '-sg (LPCZ) is turned on or off!
will not be hit.

On the other hand, if the flag is not set, a program alarm (PRGAL) is output at a position outside the safety zone 1iiiI STKA, and then an NG alarm (P△LM) is output, and automatic operation is suspended. Signal (QS
P) is output.

Therefore, the seven-axis control rJI+ shown in FIGS.
Byte 5 is deleted by a non-regular part program.
3 will not interfere with the work table.

':XX Figures 8 and 9 show examples of processing V-shaped grooves.

Figure 8 shows that after fixing the plate material W on the work table 11, the bisillary 53 is moved in the X-axis direction.
This is an example of machining a V-shaped tM 75 with half-way cutting completed by raising the cutting tool 53 by circular interpolation of mXZ2@.

FIG. 7 shows that after fixing the tentative phase W, the tool 53 is lowered to position x 2 by linear interpolation of the two XZ axes, then only the X axis is driven, and from position - This is an example in which V-shaped groove 75 is machined by moving 53 upward q to start and end mid-cutting. The arrow in the figure indicates the moving direction of the cutting tool 53.

As shown in these examples, the groove processing machine 1 of this example has the following features:
Cutting can be started in the middle of the plate UW, or can be finished 1° in the middle of the plate W.

In the example shown in FIG. 10, when moving from control of only the X axis to interpolation of two axes of XZ, the cutting speed of the cutting tool 53 is set to the same speed F in both controls. The same applies to the transition from XZ two-axis control to X@-only control at the start of mid-cutting. In other words, at the start and end of mid-way cutting, it is preferable to keep the cutting speed (combined speed in biaxial interpolation) constant for the qJ cutting surface of the plate material W at least at the bending point. In this way, if the cutting speed is kept constant at the bending point, the machining accuracy will be good.
Moreover, each axis can be easily controlled.

The present invention is not limited to the above-mentioned embodiments, but can be implemented in other appropriate modes by making appropriate design changes.

[Effect of the invention 1 As described above, in the control method of the V-shaped groove processing machine of the present invention, generally speaking, all cutting tools are controlled in areas other than the safe area (non-safe area) where there is no risk of interference with the work table. , automatic operation is prohibited, and this prohibition is lifted in the official part program, so there is no risk of interference between the two shells and the work table.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an outline of the present invention, FIGS. 2 and 3 are a plan view and a front view of a V-shaped groove processing machine implementing the present invention,
Figure 4 is an rV-IV cross-sectional side view of Figure 3, Figure 5 is a block diagram of the control device, Figure 6 is a flowchart showing the control method for the cutting axis, and Figure 7 is a timing chart showing the control method for the cutting axis. FIG. 8 is an explanatory diagram of a machining example in which cutting is completed midway; FIG. 69 is an explanatory diagram of a machining example in which mid-cutting is started and mid-cutting is terminated; and FIG. 10 is an explanatory diagram showing a preferred example of linear interpolation. 1...Groove processing machine 11...Work table 39...Cutting tool 53...Bite 65...Control device 67C...Macro program CI, C1x, C2...Code W...Plate material 7... Incision axis agent Yasuo Miyoshi, patent attorney (Figure 1, Figure 5, Figure 6, Figure 17, voluntary writing of amendments to procedures) September 6, 1999

Claims (1)

[Claims] The cutting tool has a cutting axis that allows the cutting tool to move toward and away from a plate material positioned on a work table, and a linear V-shaped groove is machined in the plate material by moving the cutting tool along the work table. In a cutting axis control method for a V-shaped groove processing machine, a safe area is defined for the cutting axis in which any cutting tool does not interfere with the work table, and automatic operation is generally prohibited outside the safe area, and When the input part program is a regular one, a macro program of the NC device inserts into the part program a code that should cancel the prohibition while the part program is being executed, and removes the prohibition while the regular part program is being executed. A cutting axis control method for a V-shaped groove processing machine characterized by releasing the cutting axis.