JPH01316114A - Two-axis control for v-shaped groove working machine - Google Patents

Abstract

PURPOSE:To work a V-shaped groove with high precision under the easy control by carrying out the working for the start and completion division of the intermediate grinding for the rectilinear control in a main grinding division, through the rectilinear interpolation by two axes of a carriage and a grinding tool. CONSTITUTION:A carriage 45 is driven in the rectilinear direction for a plate member W positioned on a worktable by a work clamping device 33, in the state where a grinding tool 39 is kept at a constant height, and a main grinding division AM having a constant depth is worked. In this case, for the main grinding division AM through the rectilinear control by only the carriage 45, an intermediate grinding starting division AS and an intermediate grinding completion division AP are work through the rectilinear interpolation by two axes of the carriage 45 and the grinding tool 39. Therefore, a V-shaped groove through the start and completion of the intermediate grinding can be worked with high precision under the easy control.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a two-axis control method for a V-shaped groove machining machine.

(Prior Art) Conventionally, when bending a plate material, in order to make the bending radius of the bent part smaller, a groove with a V-shaped cross section is formed in the bent part of the plate material using a shaver or a plano mirror, for example. is being formed.

(Problem to be solved by the invention) However, in conventional machining of V-shaped grooves using a general-purpose machine such as a shaver or a plano mirror, cutting may be started from the middle of the plate material or cutting may be stopped in the middle of the plate material. There was a problem that the processing range was limited.

Further, when machining a V-shaped groove using a conventional general-purpose machine, it takes a lot of time to set the plate material, and there is a problem that machining efficiency is poor.

Therefore, in accordance with the development of a special machine for machining a figure-7 groove, the present invention has made the controlling method appropriate.
It is an object of the present invention to provide a two-axis control method for machining a V-shaped groove with high precision at the start or end of cutting, and which is easy to control.

U Structure of the Invention] (Means for Solving the Problems) A two-axis control method for a V-shaped groove processing machine of the present invention which solves the above problems is as shown in FIG. A work clamp device 33 that grips and positions the work table 11, a carriage 45 that moves along the longitudinal direction of the work table 11, and a cutting tool 39 (bit 53) that moves up and down with respect to the gear ridge 45. In the two-axis control method for the V-shaped groove processing machine 1, the carriage 45 is moved in a linear direction while the three cutting tools are kept at a constant height with respect to the plate material W positioned by the work clamp device 33. By driving, the main cutting section AM of a constant depth is machined, and in the intermediate cutting start section ΔS and the intermediate cutting end section AP, the carriage/I5 and the cutting tool 39 are simultaneously linearly interpolated using two axes. It is characterized by machining a V-shaped groove in the plate material W by starting cutting midway or completing midway cutting.

(Function) In the two-axis control method of the V-shaped groove processing machine of the present invention, for the main cutting section AM by linear control of only the carriage 45,
Since the mid-cutting start section AS and the mid-cutting end section are performed by simultaneous two-axis linear interpolation using the Kittredge 45 and three cutting tools, the figure 7-shaped groove due to the mid-cutting start or mid-cutting end can be machined with high accuracy with easy control. can do.

(Example) Referring to FIGS. 2 to 4, the grooved groove 1 used in this example is oriented in the left-right direction (in FIG. 4, the front and back directions of the page).
A box-shaped lower frame 3 extending relatively long is provided, and left and right side plates 5 are erected on the left and right sides 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.

Further, a plurality of brackets 15 are attached to the rear side of the lower frame 3 at appropriate intervals. A guide rail 19 is installed at the top of each placket 15 and extends through the pedestal 17 to a position close to the work table 11. A Y-axis positioning device 4 for positioning in the Y direction is supported.

That is, a gearbox 21 is disposed on each of the two intermediate pedestals of the pedestal 17, and a ball screw 27 is freely rotatable between the bearing 23 of the gearbox 21 and the front bearing 25. It is pivoted on. A suitable coupling mechanism is incorporated in both gearboxes 21 so as to rotate both ball screws 25 in conjunction with each other. Further, two sprockets are fixed to the rear end of the right ball screw 27, and the sprocket 29 is rotatably connected to the servo motor MY fixed to the bracket 15 via a chino 31.

Further, a Y-axis carriage 35 having a plurality of work clamp devices 33 is supported on the guide rail 19 so as to be movable in the front and rear direction. Further, a nut member 37 that is screwed into the ball screw 27 is attached below the carriage 35.

Therefore, the ball screw 27 is driven by the nervo motor MY.
By rotating in an appropriate direction, the :V ridge 35 can be moved back and forth.

In other words, the plate material W gripped by the work clamp device 33 can be positioned at any position on the Y axis.

In order to process a V-shaped groove on the upper surface of the plate material W positioned by the Y-axis positioning device 4, the work table 1
A processing head 4 equipped with a cutting tool 39 is located above the
A seven-axis positioning device and an X-axis positioning device are provided that allow the position of the device 1 to be freely adjusted in the vertical direction (Z direction) and movable in the left and right direction.

More specifically, a guide rail 43 extending in the left-right direction is attached to the intermediate frame 7, and an X-axis carriage 45 supporting the processing head 41 in a vertically movable manner is supported on the guide rail 43. carriage 45
In order to move the left and right direction, between the left and right side plates 5,
A ball screw 47 is provided parallel to the guide rail 43.

One end of this ball screw 47 is connected to a servo motor MX (not shown) via an appropriate coupling mechanism, and is screwed into a nut member (not shown) provided inside the carriage 45. Therefore, by driving the servo motor MX, the ball screw 47 can be rotated, and the X-axis carriage 45 can be moved to any position at any speed.

A nut member 49 is connected to the servo motor MZ through an appropriate gear at the upper end of the surface processing head 41, and whose intermediate portion is fixed to the carriage 45.
A ball screw 51 screwed into is rotatably supported. Therefore, by driving the servo motor MZ, the processing head 41 equipped with the cutting tool 39 at the lower end can be moved to any height and at any speed.

In this embodiment, there are a plurality of cutting tools 39 (five).
It consists of a cutting tool 53 and a cutting tool holder 55 that integrally connects these cutting tools 53, and the tip of the cutting tool 53 is formed in a V-shape. Each byte 53 above is
It is attached to the tool holder 55 in a detachable and positionally adjustable manner. In this embodiment, when forming a V-groove on the upper surface of the plate material W, the following cutting tool protrudes more downwardly toward the invasive side so that the cutting tool cuts deeper than the preceding cutting tool.

Therefore, when grooving the plate material W, each bit 53
The resistance acting on is small. Further, a deep groove can be formed with one stroke of the 1j[] head 41.

After positioning the plate 14 W, the plate material W is placed on the work table 11
A temporary holding device 57 is provided at the lower part of the intermediate frame 7 in order to firmly fix it.

In addition, the temporary holding device 57 detects this operation and presses the plate material W.
A plate thickness detector St (see Fig. 5) is attached to detect the thickness of the plate material W in a 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 t can be detected while the plate IJW is pressed.

In order to prevent the ball screw 47 from bending due to the weight of the X-axis carriage 45, the processing head 41, etc., the ball screw 47 is normally supported from below, and when the processing head 41 passes, it is moved backward. processing head 41
A plurality of screw support drawings 59 are provided at appropriate intervals in the left-right direction to avoid interference with the screws. Therefore, when the processing head 41 moves in the left-right direction, the height of the cutting tool 53 does not vary greatly.

One end of an inverted U-shaped arm 61 whose horizontal portion is higher than the height of the upper frame 5 is attached to the side surface of the upper frame 5 on the right side of the groove processing machine 1 in such a manner that it can rotate freely by an allowable angle. An operation panel 63 is provided at the other end of the arm 61 and is rotatable around a vertical axis by an allowable angle. Therefore, the operation panel 63 can be moved left and right within an allowable range, and its operation surface can be oriented in a direction that is easy for the operator to see.

Referring to FIG. 5, the control device 65 is mainly composed of an NC device 67 having a calculation section 67A therein.
In addition, the aforementioned operation panel 63 and each motor MX, MY
, MZ drivers Dx, □v, □z
, and input/output interfaces 69, 71 are connected. Each motor MX, MY.

MZ has position detectors EX and E that detect the operation results.
Y, EZ and speed detectors TGX, TGY.

TGZ is connected.

The plate thickness sensor St is connected to the input interface 69, and the output interface 71 has a solenoid S○L1.5QL2.8013 that divides the workpiece clamping device 33 into three groups and operates them in predetermined combinations. It is connected.

With the above configuration, the NG device 67 includes the servo motor Mx,
MY, MZ are driven, and the Y-axis gear ridge 35, the X-axis gear ridge 45. The processing heads 41 can be controlled to arbitrary positions at arbitrary speeds. That is, by driving the Y@carriage 35, the processing position of the plate material W held by the work clamp device 33 can be positioned directly below the cutting tool 53. Further, by driving the X@carriage 45 and the processing head 41, the cutting tool 53 can be moved in the X@force direction while controlling the processing head 41 to a predetermined height. Furthermore, the cutting tool 53 can be raised simultaneously while moving the Y@carriage 35.

As shown in FIG. 6, the cut of the cutting tool 53 into the mid-cutting start section AS is made, for example, from a position iPA (XA, ZA) 1 mm higher than the upper surface of the plate material W, and at a cutting angle θ=Oo.
−3° (θ0 is the relief angle of the cutting tool 53) and starts toward the starting point P[3(XB, ZB) of the main cutting section AM. Further, in the mid-cutting end section AP, the cutting tool 53 is moved to a position iw+m higher than the upper surface of the plate material W starting from the end point Pc of the main cutting section AM.

In addition, as shown in FIG. 7, the cutting speed F is set in the main cutting section A in order to achieve good finishing accuracy and to protect the cutting tool 53.
M, both the intermediate cutting start section AS and the intermediate cutting end section AP are set at the same speed F.

As shown in the flowchart of FIG. 8, the NO table device 7 inputs the following user variables in step 801: plate thickness torn, groove depth dm1, bite relief angle θ0, feed rate F, and X coordinates Xs and Xcm of the main cutting section AM. Then, in step 802, the calculation unit 67A executes the calculation of the following equation,
Motor MX, 1v towards target points Ps, Pc, Pz
Drive lz.

XA =Xs-[(d+1)jan(90-
θ)+2F-7] ZA=t+”I
/3 ten 0. 7F+IZZ=t+1 Here, the correction value for speed F is added to byte 5.
3 is to accurately determine the starting point PB and ending point Pc of the main cutting section AM, since a deviation from the target trajectory actually occurs due to operation delay. However, due to the equipment, the speed FZ of the cutting tool 53 was set to 3 m/min.

Therefore, by determining the target point as described above in accordance with the above condition input, the desired processing shown in FIG. 6 can be performed. Therefore, the user can perform accurate machining with easy input without having to consider adjustments due to the tool relief angle θ0 or deviations due to operation delays.

Incidentally, when the control method for the two XZ axes shown in FIG. 6 is compared with that using circular interpolation, the linear interpolation shown in FIG. 6 is more advantageous. That is, in the example of circular interpolation, the radius of the circular arc must be determined according to the thickness of the plate material W, and it is difficult to control the speed to obtain a good finish.

FIG. 9 is an explanatory diagram showing a specific example of control.

In the illustrated example, when machining two V-shaped grooves from point P2 to point P4 and from point P7 to the left end of plate material W, points PO, P+, P2, etc. are indicated in parentheses in this order. It has been shown that it is sufficient to control the axes sequentially. That is, in this example, first, the workpiece clamp device 33 is moved in the Y-axis direction with respect to the cutting tool 53 positioned at the point PO. Next, lower the cutting tool 53 at point P1, and move to point P2 on the right side of the cutting start position.
The X-axis is also operated nearby to start machining faster. While keeping the cutting tool 53 at a predetermined height, move it to the vicinity of point P4, perform the linear interpolation of the XZ two axes shown in FIG. .

After that, in order to start cutting the next V-shaped groove halfway from point P5, linear interpolation on the XY two axes is performed from point P8 to point P8.
, ZX, and XY in this order, two V-shaped grooves are machined at the end of mid-cutting and at the start of mid-cutting.

In this way, in this example, by incorporating 2@ control such as XZ and XY as appropriate, it is possible to start cutting midway or end cutting midway, and in addition, machining efficiency can be further improved.

FIG. 10 and FIG. 11 are explanatory diagrams of specific processing examples.

As mentioned above, in this example, it is possible to start and end mid-cutting as appropriate, so as shown in FIG.
A V-shaped groove 75 at which cutting is finished halfway through the book and two V-shaped grooves 75 at which cutting begins halfway through the book are machined. Next, adjacent V
A cutting line is made in the middle of the V-shaped groove 75 by a cutting section (not shown), and then, as shown by the broken line, the tip 79 of the V-shaped groove 75 is punched, for example, by a punch press (not shown). Finally, by bending the cut portions for each V-shaped groove 75 using a bending machine (not shown), seven lunges 81, such as a frame for a doorway or a window frame, as shown in FIG. 11, are formed. It is possible to produce products with

As described above, in the two-axis control method of the V-shaped groove processing machine of this example, the mid-cutting start section or the mid-cutting end section is performed by linear interpolation in accordance with the linear control of the main cutting section, so the speed at the refraction point Variations are minimized and the finish at the inflection point is good.

Furthermore, as shown in FIGS. 6 to 8, the cutting start point and end point can be easily calculated using approximate expressions, so that control is easy.

Furthermore, since the cutting speed is the same at the bending point, speed fluctuations at the bending point are smaller, resulting in better finishing accuracy.

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

[Effects for Valve] As described above, in the two-axis control method of the V-shaped groove processing machine of the present invention, in contrast to the linear control in the main cutting section, the intermediate cutting section and the intermediate cutting end section are controlled by the carriage and the cutting tool. simultaneous 2
Since this is performed by @ linear interpolation, it is possible to machine a V-shaped groove with high precision by easy control when cutting is started midway or when cutting is ended midway.

[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 that can carry out the present invention, and FIG. 4 is a diagram showing the IV of FIG. 3. -IV sectional side view, Fig. 5 is an explanatory diagram of the blocked locus of the control device, Fig. 10
The figure is an explanatory diagram of a processing example, and FIG. 11 is an explanatory diagram of a product example. 1 Grooving machine 11 Work table 33 Work clamp device 35 Three Y-axis carriages Cutting tool 53 Bit 65 Control device 75 V Shape groove 81... Flange MX, MY, MZ... Nervo motor W... Plate material X, Y, Z... Axis PA... Cutting start point pz... Cutting end point Agent Patent attorney 3 Yasushi Yoshio Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Procedures...Orthographical text 1999

Claims (1)

[Claims] A V-shaped groove processing machine equipped with a work clamp device that grips a plate material and positions it on a work table, a carriage that moves along the longitudinal direction of the work table, and a cutting tool that moves up and down with respect to the carriage. In the two-axis control method, the main cutting section of a constant depth is machined by driving the carriage in a linear direction while keeping the cutting tool at a constant height with respect to the plate material positioned by the work clamp device. At the same time, in the intermediate cutting start section and the intermediate cutting end section, the carriage and the cutting tool are simultaneously linearly interpolated in two axes, thereby machining a V-shaped groove in the plate material by starting the intermediate cutting or ending the intermediate cutting. A two-axis control method for a V-shaped groove machining machine.