JP2677820B2 - Processing method for intermediate bent products using V-shaped groove processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a method for processing an intermediate bent product using a V-shaped groove processing machine.

(Prior Art) Conventionally, a product having a shape in which a flange is projected from an intermediate portion of a plate material such as a frame of an entrance door or a window frame (step 10 in FIG. 1).
2)), it is difficult to form a V-shaped groove in the bent part because the end of the bent part is in the middle of the plate material, and the V-shaped groove is formed in the bent part. Instead, it was bent as it was.

(Problems to be Solved by the Invention) However, the processing of the V-shaped groove at the time of bending is necessary to minimize the bending radius, and especially for highly accurate bending of a thick plate material. Required.

Therefore, an object of the present invention is to provide a method for highly accurately processing a product having a shape in which a flange portion is projected from an intermediate portion of a plate material such as a door frame or a window frame.

[Structure of the Invention] (Means for Solving the Problems) A method for processing an intermediate bent product using a V-shaped groove processing machine of the present invention for solving the above problems is as shown in FIG. A work clamp device 33 for gripping the plate W and positioning it on the work table; a carriage that moves along the longitudinal direction of the work table; and a cutting tool (bite 53) that moves up and down with respect to the carriage. Using the V-shaped groove processing machine, the plate material W is positioned by the work clamp device 33, and then the carriage and the cutting tool 53 are operated sequentially or simultaneously to start intermediate cutting on the plate material W. V due to end of cutting B
The entire length of the V-shaped groove is processed at the same cutting speed (step 101), and then bending processing is performed with the V-shaped groove inside through an appropriate cutting line (step 102). It is characterized in that a bent product having a shape in which the flange 81 is projected from the middle is obtained.

(Operation) In the method for processing an intermediate bent product by the V-shaped groove processing machine of the present invention, the entire length of the V-shaped groove due to the intermediate cutting start A or the intermediate cutting end B at the bent portion of the flange 81 is cut at the same cutting speed. Processed with this flange 81 with this V-shaped groove inside
Is bent. The appropriate cutting line necessary for bending can be appropriately processed by a punching machine, a laser processing machine or the like.

(Embodiment) Referring to FIGS. 2 to 4, the groove processing machine 1 used in the present embodiment is in the left-right direction (in FIG. 4, the front-back direction of the paper).
In addition, a box-shaped lower frame 3 extending relatively long is provided, and left and right side plates 5 are erected on both left and right side portions of the lower frame 3. The upper parts of the left and right side plates 5 are connected to the integrated liquid by a vertical intermediate frame 7, and are also connected to each other by an appropriate connecting plate 9.

A work table is provided on the lower frame 3 for supporting a plate material W to be processed (not shown in FIGS. 2 to 4).
11 is attached, and this work table 11 has an auxiliary table 13 for supporting the plate material W of the work table 11.
Is installed.

Further, a plurality of brackets 15 are attached to the rear side of the lower frame 3 at appropriate intervals. A guide rail 19 extending to a position close to the work table 11 via a pedestal 17 is laid on an upper portion of each bracket 15, and a plate material W is gripped on the guide rail 19 in the front-back direction (Y direction). )
A Y-axis positioning device for positioning is supported.

That is, a gearbox 21 is provided on each of two intermediate pedestals of the pedestal 17, and a ball screw 27 rotates between a bearing 23 in the gearbox 21 and a front bearing 25. Freely supported. Both gearbox 21
An appropriate connecting mechanism is incorporated in the two so as to rotate both ball screws 25 in an interlocking manner. A pulley 29 is fixed to the rear end of the ball screw 27 on the right side, and the pulley 29 is mounted on the bracket.
Servo motor M _Y fixed to 15 Timing belt 31
Is rotatably connected via a.

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-rear direction. Further, below the carriage 35, a nut member 37 screwed with the ball screw 27 is attached.

Therefore, the servomotor M _Y is driven and the ball screw 27
The carriage 33 can be moved in the front-back direction by rotating the carriage in an appropriate direction. In other words, the plate material W gripped by the work clamp device 33 can be positioned at an arbitrary position on the Y axis.

In order to form a V-shaped groove on the upper surface of the plate material W positioned by the Y-axis positioning device, the work table
Above the position 11 is provided a Z-axis and X-axis positioning device that allows the machining head 41 equipped with the cutting tool 39 to be positionally adjusted in the vertical direction (Z direction) and movable in the horizontal 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 that supports the processing head 41 so as to be vertically movable is supported by the guide rail 43. A ball screw 47 parallel to the guide rail 43 is provided between the left and right side plates 5 in order to move the carriage 45 in the left-right direction. One end of the ball screw 47 is connected to a servo motor M _X (not shown) via an appropriate connecting mechanism, and a nut member (not shown) provided inside the carriage 45 is screwed into the screw. Therefore, by driving the servo motor M _X , the ball screw 47 can be rotated and the X-axis carriage 45 can be moved to any position at any speed.

Further, an upper end of the machining head 41 is connected to a servomotor M _Z through a gear as appropriate, and an intermediate part of the ball head is screwed to a nut member 49 fixed to the carriage 45. 51 is rotatably supported. Therefore, by driving the servo motor M _Z , the machining head 41 having the cutting tool 39 at the lower end can be moved to any height at any speed.

In this embodiment, the cutting tools 39 are plural (five).
Of the cutting tool 53 and a cutting tool holder 55 for integrally connecting the cutting tools 53.
It is formed in the shape of a letter. Each of the cutting tools 53 is attached to a cutting tool holder 55 so as to be detachable and position-adjustable. In the present embodiment, when forming a V groove on the upper surface of the plate material W,
The rear side projects downward so that the subsequent bite cuts deeper than the preceding bite. Therefore, when the plate material W is grooved, the resistance acting on each bite 53 is small. Further, the deep groove can be processed by the one-stroke operation of the processing head 41.

In order to firmly fix the plate material W to the work table 11 after the positioning of the plate material W, a plate pressing device 57 is provided below the intermediate frame 7. The plate holding device 57 is provided with a plate thickness detector St (see FIG. 5) which detects this operation and detects the thickness t of the plate W while the plate W is held down.

Therefore, the plate pressing device 57 is operated by, for example, a pneumatic cylinder, and the arm tip end of the device 57 is pressed against the upper surface of the plate material W, so that the plate material W on the upper surface side of the work table 11 is pressed.
Can be firmly fixed. Further, the plate thickness t can be detected while the plate material W is pressed.

The ball screw 47 is an X-axis carriage 45 and a machining head.
In order to prevent bending due to the weight of the ball 41, etc., the ball screw 47 is normally supported from below and the machining head 41
When passing through, a plurality of screw support devices 59 are provided at appropriate intervals in the left-right direction so as to move backward and avoid interference with the processing head 41. Therefore, when the processing head 41 is moved in the left-right direction, the height of the cutting tool 53 does not significantly change.

On the side surface of the upper frame 5 on the right side of the groove machine 1, one end of an inverted concave arm 61 having a horizontal portion higher than the height of the upper frame 5 is attached in such a manner that the arm 61 is rotatable by an allowable angle. At the other end of the arm 61, an operation panel 63 is provided which is rotatable around a vertical axis by an allowable angle.
Therefore, the operation panel 63 can be moved right and left 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, on which the operation panel 63 and drivers D _X , D for driving the respective motors M _X , M _Y , M _Z are provided. _Y , D _Z and input / output interfaces 69, 71 are connected. Position detectors E _X , E _Y , E _Z and speed detectors TG _X , TG _Y , TG _Z for detecting the operation results are connected to the motors M _X , M _Y , M _Z.

The plate thickness sensor St is connected to the input interface 69, and the solenoids SOL1, SOL2, SOL3 for operating the work clamp device 33 into three groups and operating them in a predetermined combination are connected to the output interface 71. ing.

With the above configuration, the NC device 67 has the servo motors M _X , M _Y , M _Z.
Can be driven to control the Y-axis carriage 35, the X-axis carriage 45, and the machining head 41 to arbitrary positions at arbitrary speeds. That is, the processing position of the plate material W gripped by the work clamp device 33 can be positioned immediately below the cutting tool 53 by driving the Y-axis carriage 35. Further, by driving the X-axis carriage 45 and the processing head 41, the processing head
The bite 53 can be moved in the X-axis direction while controlling 41 to a predetermined height. Further, the cutting tool 53 can be simultaneously raised while moving the Y-axis carriage 35.

 6 and 7 show examples of processing the V-shaped groove.

FIG. 6 shows that after the plate material W is fixed on the work table 11, the bite 53 is moved to the position X ₁ in the X-axis direction, and then in the intermediate cutting end section A _P , the bite 53 is formed by circular interpolation of the XZ2 axis.
Is an example in which the V-shaped groove 75 that has been cut midway is machined by raising.

Similarly, in FIG. 7, after fixing the plate material W, in the intermediate cutting start section A _S , the bite 53 is lowered to the position X ₂ by linear interpolation of the XZ2 axis, and then only the X axis is driven to perform the intermediate cutting from the position X _3. it is an example of machining a V-shape groove 75 of the cutting start and middle cutting ends halfway to raise the byte 53 by linear interpolation of the termination section a _P in again XZ2 axis. The arrow in the figure indicates the moving direction of the cutting tool 53.

As shown in these examples, in the grooving machine 1 of the present example, cutting can be started from the middle of the plate material W, or can be ended in the middle of the plate material W.

In this method, since the bite 53 is servo-controlled, unlike the case where the bite 53 is raised by the so-called M function of the NC device, the finish of the descending end point and the ascending start point is uniform, and the bite 53 is damaged. There is nothing.

Comparing the control methods of the XZ2 axes in FIGS. 6 and 7,
The linear interpolation shown in FIG. 7 is more advantageous. That is, in the example of the circular arc interpolation shown in FIG. 6, the radius of the circular arc has to be determined according to the thickness of the plate material W, and it is difficult to control the speed for achieving a good finish.

Therefore, the linear interpolation example shown in FIG. 7 is advanced, and a more suitable processing example is shown in FIG.

That is, in the example of FIG. 8, when shifting from the control of only the X axis to the interpolation of the XZ2 axis, the cutting speed of the cutting tool 53 is set to the same speed F in both controls. The same applies when shifting from XZ two-axis control to control of only the X-axis at the start of cutting in the middle. In other words, it is preferable that the cutting speed (composite speed in biaxial interpolation) with respect to the cutting surface of the plate W be constant at least at the bending point at the start and end of the mid-cut. In this way, if the cutting speed is constant at the refraction point, the processing accuracy becomes good and the XYZ axes can be easily controlled. The fact that the processing accuracy is good has been verified by multiple experiments.

FIG. 9 is an explanatory diagram showing an example of controlling the XYZ axes with respect to the plate material W.

In the illustrated example, when processing two V-shaped grooves from the point P ₂ to the point P ₄ and from the point P ₇ to the left end of the plate material W, the points P ₀ , P ₁ , P ₂ ... It is shown that the axes indicated by () may be sequentially controlled. That is, in this example, first, the point P
_The work clamp device 33 is moved in the Y-axis direction with respect to the cutting tool 53 located at ₀ . Next, the cutting tool 53 is lowered at the point P ₁ , and the X axis is also operated near the point P ₂ on the right side of the cutting start position to start the machining faster. Byte 53 is moved up to the vicinity of the point P ₄ while keeping a predetermined height, where for example, by performing a linear interpolation XZ2 axis shown in FIG. 7, the middle cutting after the end byte 53 in the vicinity of the point P ₄ To raise.

After that, linear interpolation of XY2 axis is performed from point P ₅ to point P ₆ to start cutting the next V-shaped groove on the way.
By controlling each axis in the order of X and XY, two V-shaped grooves, one of which is the end of intermediate cutting and the other of which intermediate cutting is started, are machined.

As described above, in the present example, by appropriately incorporating biaxial control such as XZ and XY, it is possible to start the mid-cut and end the mid-cut, and further improve the machining efficiency.

10 and 11 are explanatory views of specific processing examples.

As described above, in the groove processing machine 1 of this example, the clamp device 33
Since it is possible to start and finish the intermediate cutting while moving the, the two V-shaped grooves 75 with the intermediate cutting completed and the two V-shaped grooves with the intermediate cutting started as shown in FIG.
Process 75. Next, a cutting line is inserted in the middle of the V-shaped grooves 75 adjacent to each other by a cutting machine (not shown), and then the tip end portion 79 of the V-shaped groove 75 is punched by a punch press (not shown) as shown by a broken line. Finally, an intermediate bending product having a flange 81 as shown in FIG. 11 can be manufactured by bending each cut portion with each V-shaped groove 75 inside by a bending machine (not shown). .

As described above, in the method for processing the intermediate bent product of this example, the V-shaped groove 75 can be processed only in the bent portion of the plate material by the intermediate cutting start A or the intermediate cutting end B, and the flange is formed.
The 81 can be bent with high precision.

Further, as shown in FIG. 10, by making a small hole in the tip end portion 79, the ineffective portion can be easily removed without deteriorating the appearance.

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

[Effects of the Invention] As can be understood from the above description of the embodiments, the present invention is, in short, a work clamp device that grips a plate member and positions it on a work table, and a work clamp device that is moved along the longitudinal direction of the work table. Using a V-shaped groove processing machine provided with a carriage and a cutting tool that is moved up and down with respect to the carriage, the plate material is positioned by the work clamp device, and then the carriage and the cutting tool are operated sequentially or simultaneously. By doing so, the entire length of the V-shaped groove is cut on the plate material at the same cutting speed by the start of the midway cutting or the end of the midway cutting, and then the bending process is performed with the V-shaped groove inside through an appropriate cutting line. Is performed to obtain a bent product in which a flange portion is projected from the middle of the plate material, which is a method for processing an intermediate bent product using a V-shaped groove processing machine. .

Therefore, according to the present invention, when the flange portion is bent at the intermediate portion of the plate material, the bending radius of the bent portion can be made smaller than the plate thickness. As described above, when machining a V-shaped groove in order to make the bending radius of the bent portion smaller than the plate thickness, the entire length of the groove is machined at the same cutting speed. Also in the above, the cutting conditions are the same, and accurate processing can be performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of the present invention, FIGS. 2 and 3 are plan and front views of a V-shaped groove processing machine capable of carrying out the present invention, and FIG. 4 is an IV of FIG. -IV cross section side view, 5th
FIG. 6 is a block diagram of the control device, FIG. 6 is an explanatory view of a processing example by the end of intermediate cutting, FIG. 7 is an explanatory view of a processing example by the start of intermediate cutting and end of intermediate cutting, and FIG. 8 is a preferred example of linear interpolation. FIG. 9 is an explanatory diagram of a bite locus, FIG. 10 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 ...... workpiece clamping device 35 ...... Y-axis carriage 39 ...... cutting tool 53 ...... byte 65 ...... controller 75 ...... V-shaped grooves 81 ...... flange M _X , M _Y , M _Z …… Servomotor W …… Plate material X, Y, Z …… Axis

Claims (1)

(57) [Claims] 1. A V provided with a work clamp device for holding a plate material and positioning it on a work table, a carriage moved along the longitudinal direction of the work table, and a cutting tool vertically moved with respect to the carriage. By using a V-shaped groove processing machine, the plate material is positioned by the work clamp device, and then the carriage and the cutting tool are operated sequentially or simultaneously to start V-shaped groove on the plate material by starting or ending the intermediate cutting. Is processed at the same cutting speed, and then the V
An intermediate bent product using a V-shaped groove processing machine, characterized in that a bent product having a flange portion protruding from the middle of the plate material is obtained by performing a bending process with the groove groove inside. Processing method.