JP2000225520A - Cutting work method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate incoming of a workpiece and enhance a vibration preventing effect. SOLUTION: A retainer device 53 provided in the vicinity of a cutting line on tables 25, 27 moved to reciprocate in right/left directions relating to a saw blade BS cutting a workpiece is made to take refuge from a table surface. The workpiece is loaded in the tables 25, 27 easily from upward by using a crane or the like. A cutting position of the workpiece is positioned in a cutting line of the saw blade BS. The retainer device 53 is reset onto the workpiece, and it is surely retained from upward along the cutting line CL of the saw blade BS by the retainer device 53. When cutting work is applied to the workpiece by moving the tables 25, 27 in the forward in a direction of the saw blade BS, a vibration at cutting work time is surely suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting method and an apparatus therefor, and more particularly to a cutting method for cutting a work by holding a work on a table reciprocating in a left-right direction with respect to a cutting tool with a holding device, and cutting the work. Related to the device.

[0002]

2. Description of the Related Art Conventionally, in a vertical band sawing machine as a cutting device for cutting a work, a table on which the work is placed is provided so as to be reciprocally movable in the left-right direction with respect to a saw blade. The work on the table is clamped by the clamp device, and the clamp device moves forward to advance the work by a desired cutting width in a direction substantially orthogonal to the cutting line of the saw blade. Moves forward in the direction of the saw blade to cut the workpiece. Next, after the table is moved backward to the original position, the clamping device again moves the work on the table forward by a desired cutting width from the cutting line of the saw blade, and the table moves forward in the direction of the saw blade. The work is cut. The above cutting process is repeated, and the workpiece is automatically cut in sequence.

For example, in a cutting apparatus that automatically cuts a single workpiece using a band sawing machine, if the distance between the clamping device and the cutting line is long, the workpiece vibrates during cutting.

[0004] In order to suppress the above-mentioned vibration, there is provided a holding device for holding a work on a table from above with holding portions of a plurality of cylinders provided on a gate-shaped main body.

Alternatively, as another conventional holding device 101, as shown in FIG. 5, a holding portion 103 which is urged downward by a cylinder or the like on a saw blade guide is provided. A roller 105 is provided, and the workpiece W moving forward is moved by the saw blade BS via the roller 105.
Is configured to press against the table 107 from above in the vicinity of the cutting position.

[0006]

By the way, in the conventional pressing device having a plurality of cylinder pressing portions 103 provided on the former gate-shaped main body, the vibration preventing effect is large, but the work W There is a problem in that the presser device itself becomes an obstacle when carrying the paper onto the table from above.

In addition, the conventional roller 105 described above is used.
Since the work W moving forward cannot be sufficiently held by the holding device 101 for holding the work W, the vibration prevention effect of the work W is small, so that the processing accuracy is poor and the saw blade B
There was a problem that the life of S was shortened. Further, in this case, there is a problem that the effect is small unless the shape of the work W is not flat.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a cutting method and a cutting apparatus capable of easily carrying in a work and increasing a vibration preventing effect. is there.

[0009]

According to a first aspect of the present invention, there is provided a cutting method according to the present invention, wherein a cutting tool is provided near a cutting line on a table which reciprocates left and right with respect to a cutting tool for cutting a workpiece. The work is placed on the table surface, the cutting position of the work is positioned on the cutting line of the cutting tool, and the holding device is returned on the positioned work. At the same time, the work is pressed from above by the pressing device, and the table is moved forward in the direction of a cutting tool to cut the work.

[0010] Therefore, since the holding device is avoided from above the surface of the table, the work can be easily mounted on the table from above using a transfer means such as a crane. In addition, after the work is placed on the table, the holding device is returned to the original position, and the work is reliably pressed from above along the cutting line by the holding device, so that vibration during cutting is reliably suppressed. .

According to a second aspect of the present invention, there is provided a cutting apparatus for mounting a work on a base having a saw blade for cutting the work, the table being reciprocally movable in the left-right direction with respect to the cutting tool. A pressing device comprising a pressing device main body provided on the table near the cutting line and an upper pressing portion provided in the pressing device main body so as to be able to ascend and descend to press the work on the table from above, ,
The pressing device main body is provided so as to be able to be avoided from above the table surface.

Therefore, the operation is similar to that of the first aspect, and since the main body of the holding device of the holding device is avoided from the surface of the table, the work can be easily placed on the table from above by using a transfer means such as a crane. Is placed. In addition, after the work is placed on the table, the holding device is returned to the original position, and the work is reliably pressed from above along the cutting line by the holding device, so that vibration during cutting is reliably suppressed. .

According to a third aspect of the present invention, there is provided a cutting apparatus according to the second aspect, wherein the pressing device main body has a portal shape, and the pressing device main body includes a plurality of upper pressing portions. It is characterized by becoming.

Therefore, since the holding device main body has a gate shape, a plurality of upper holding portions are easily provided on the horizontal portion along the cutting line in the longitudinal direction of the table.

According to a fourth aspect of the present invention, there is provided a cutting apparatus according to the second or third aspect, wherein the holding device main body is rotatable in a direction to avoid the work when the work is carried in from the surface of the table. It is characterized by being provided.

Therefore, by simply rotating the main body of the holding device, the holding device can be easily avoided from the surface of the table and returned to the original position.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cutting apparatus according to the present invention will be described below with reference to the drawings, taking an example of an automatic vertical band sawing machine called a thin plate automatic slicing machine as a cutting apparatus.

Referring to FIG. 3 and FIG. 4, an automatic vertical band sawing machine 1 according to the present embodiment includes a base 3 installed on a floor.
A saw blade housing 5 having a C-shaped cross section is provided substantially at the center in the left-right direction in FIG. 4 of the base 3 as shown in FIG.

The saw blade housing 5 has an endless band saw blade BS (cutting tool) as an example of a cutting tool, a rotatable drive wheel 7 for supporting the band saw blade BS and a driven wheel 9, and the driving device. A wheel drive motor (not shown) for rotating the wheel 7 is provided.

More specifically, the saw blade housing 5 includes a lower frame 11 for accommodating the drive wheel 7 and the wheel drive motor, a support frame 13 erected on one side of the upper surface of the lower frame 11, and a support frame 13. The upper frame 15 is integrally fixed to the upper portion and houses the driven wheel 9. The upper frame 15 has a C-shaped cross section provided with a foot portion 17 that is opened rightward in FIG. 3 by the frames 11, 13, and 15. I have.

One end of the band saw blade BS runs from the upper frame 15 to the lower frame 11 from the top to the bottom through the opening of the flap portion 17 from one side to the other, and the other side of the band saw blade BS moves downward in the support frame 13. It is provided to run upward from.

An operation box 21 having an operation panel 19 having various buttons for operating the operation of the automatic vertical band sawing machine 1 is provided on the side of the support frame 13.

A table 23 on which the work W is placed
Is located above the lower frame 11 described above,
The upper surface of the base 3 is provided movably in the left-right direction (X-axis direction) in FIG.

More specifically, the table 23 has a band saw blade BS.
The front table 25 is provided on the front side (left side in FIG. 3) of the cutting line CL, and the rear table 27 is provided on the back side (right side in FIG. 3) of the cutting line CL of the band saw blade BS. The front table 25 and the rear table 27 are configured to run endlessly through the groove 29 between the table 25 and the rear table 27 as described above, and both ends in the longitudinal direction of the front table 25 and the rear table 27 are integrally connected by a connecting member (not shown). Have been. The front table 25 and the rear table 27 are configured to integrally reciprocate in the left-right direction (X-axis direction) on a linear guide 31 extending in the X-axis direction on the upper surface of the base 3.

On the rear table 27, there is provided a cutting width positioning device 35 provided with a clamping device 33 for clamping the work W. As shown in FIG. 3, the clamp device 33 is configured to move forward and backward in the direction of the cutting line CL of the band saw blade BS to position the cutting width of the work W.

More specifically, as shown in FIG. 3, two ball screws 37 are extended on the rear table 27 in the Y-axis direction on the rear table 27, and both end sides thereof are interposed via bearing portions 39. It is bearing.

The clamping device 33 is provided with, for example, a servo motor 41 as a traveling driving means. The rotational force of the servo motor 41 is transmitted through rotation transmitting means such as a wheel and a timing belt, and the ball screw 37 is rotationally driven. Then, as shown in FIG.
Is moved in the Y-axis direction along the linear guide.

Further, the support portion 45 of the positioning device main body 43 is provided.
Is provided with a clamp device 33 as shown in FIG. As the clamp device 33, a clamp cylinder 47 is provided on the upper portion of the support portion 45, and an upper clamp jaw 49 provided at a lower end of a piston rod (not shown) of the clamp cylinder 47 is provided with a linear guide (shown in FIG. (Omitted)
A lower clamp jaw 51 for gripping the work W together with the upper clamp jaw 49 is fixed to a lower portion of the column 45. Note that the gripping surface of the lower clamp jaw 51 is located substantially at the pass line PL.

The servo motor 41 is electrically connected to a controller (not shown), and the operation of the clamp cylinder 47 is controlled by, for example, an electromagnetic valve or the like which is electrically connected to the controller. Is configured.

Next, the presser device as a main part of the present embodiment will be described with reference to the drawings.
In FIG. 3, a gate-shaped holding device 53 as shown in FIG. 4 is provided near the cutting line CL of the band saw blade BS on the left side.

More specifically, as shown in FIG. 4, in the pressing device 53, a horizontal portion 57 of a pressing device main body 55 having a gate shape is provided with, for example, a total of five pressing cylinders 59 in the present embodiment. Attached, each presser cylinder 5
The piston rod 61 of FIG. 9 passes through the horizontal portion 57 of the pressing device main body 55 as shown in FIG. 3, and moves downward so that the upper pressing portion 63 of the lower end of the piston rod 61 presses the upper surface of the work W. It is provided to be able to expand and contract. In addition,
Each upper holding portion 63 is provided so as to rise to a position where the cutting width positioning device 35 that has moved near the cutting line CL does not interfere.

A lower holding portion 65 is provided on the table 23 at a position opposing below each upper holding portion 63, as shown in FIG. The operation of each of the presser cylinders 59 is controlled by, for example, an electromagnetic valve or the like that is electrically connected to a control device.

In FIG. 4, two holding cylinders 59 are provided at a narrow interval on the right end side of the horizontal portion 57 of the plate holding device main body 55 in FIG.

As shown in FIGS. 1 and 2, the lower part of the holding device main body 55 has a lower part of a column-shaped column 67 supported by a bracket 69 provided on the table 23.
As shown in FIGS. 1 and 3, for example, the avoidance drive cylinder 7 provided as an avoidance drive means provided on the front table 25 side is provided on the left support portion 67 of the holding device main body 55 in FIG. 2.
The tip of one piston rod 73 is connected. Therefore, the presser device main body 55 is rotated by the operation of the avoidance drive cylinder 71 in the direction of avoiding from the surface of the rear table 27 on which the work W is to be placed as shown in a two-dot chain line in FIG. It is configured to be movable.

It should be noted that even if the table 23 moves rightward in FIG. 4, there is no collision because the position of the avoidance drive cylinder 71 stops at a position to the left of the position of the band saw blade BS.

With the above structure, the pressing device main body 55 is rotated to the position indicated by the two-dot chain line shown in FIG. 1 by the operation of the avoidance drive cylinder 71, and the surface of the rear table 27 is opened. Therefore, as described above, the holding device 53
The work W is easily placed on the rear table 27 from above using a crane or the like.

The rotation of the servo motor 41 drives the ball screw 37 to rotate, and the positioning device main body 43 moves forward,
When the clamp cylinder 47 of the clamp device 33 operates,
The work W is composed of the upper clamp jaw 49 and the lower clamp jaw 5
1 clamped.

By the operation of the avoidance drive cylinder 71, the presser device main body 55 is rotated to the position shown by the solid line in FIG. 1 and is set up on the surface of the rear table 27 and above the work W.

The operator inputs the cutting width and the expected number of cutting for each processing station of each product by operating the switch. Thereafter, when the start button is pressed, the presser cylinder 59 of the presser device 53 is operated, and the upper presser 63 presses the work W against the lower presser 65 to perform pressing. Even if the clamping device 3
Even if the clamp position of No. 3 is far from the cutting line CL, the work W is pressed near the cutting line CL, so that vibration of the work W at the time of cutting can be prevented. Moreover, since the work W is reliably pressed from above by the plurality of upper pressing portions 63 along the cutting line CL, vibration during cutting can be suppressed more reliably.

In the state where the work W is positioned and pressed as described above, the table 23 moves forward in the right direction in FIG. 4, and is cut into products with the set cutting width.

Next, the presser cylinder 59 of the presser device 53 is operated to raise the upper presser 63 to release the press of the work W, and the product is carried out in the left work takeout direction in FIG. The device 35 retreats and stops so that the tip of the work W is located behind the cutting line CL of the band saw blade BS. In this state, the table 23 retreats leftward in FIG. 4, so that the front end surface of the work W is returned to the original position without contacting the band saw blade BS.

The cutting of the next product is performed by the servo motor 41 so that the workpiece W is sequentially positioned at each cutting position for each processing station based on the processing program of the control device.
, A cutting operation is automatically performed sequentially at the set cutting width.

As described above, the products obtained by cutting each product at each processing station are released from the front table 25 with the presser released.

The present invention is not limited to the above-described embodiment of the present invention, but can be embodied in other forms by making appropriate changes. In the present embodiment, an automatic vertical band sawing machine has been described as an example of a cutting machine, but a cutting machine such as another band saw or a circular saw and other cutting machines may be used.

For example, the plurality of holding cylinders 59 provided with the above-mentioned upper holding portions 63 are separately provided on the holding device main body having a simple columnar shape, for example, instead of the above-mentioned gate-shaped shape. May be separately rotatably provided on a table by an avoidance drive means such as an avoidance drive cylinder.

[0046]

As will be understood from the above description of the embodiments of the present invention, according to the first aspect of the present invention, the pressing device main body of the pressing device can be avoided from the surface of the table. The work can be easily placed on the table from above using the transfer means. Moreover, after the work is placed on the table, the presser can be returned to the original position, so that the work can be surely pressed from above along the cutting line by the presser, so that vibration during cutting can be suppressed reliably. Can be.

According to the second aspect of the present invention, the effect is the same as that of the first aspect, and the pressing device main body of the pressing device can be avoided from the surface of the table. Can be easily placed on the table. Moreover, after the work is placed on the table, the presser can be returned to the original position, so that the work can be surely pressed from above along the cutting line by the presser, so that vibration during cutting can be suppressed reliably. Can be.

According to the third aspect of the present invention, since the holding device main body has a gate shape, a plurality of upper holding portions can be easily provided on the horizontal portion along the cutting line in the longitudinal direction of the table. .

According to the fourth aspect of the present invention, it is possible to easily avoid the pressing device from above the table or to return to the original position by simply rotating the pressing device main body.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a side view of a holding device.

FIG. 2, showing an embodiment of the present invention, is a front view of a holding device.

FIG. 3 is a side view showing the entire automatic vertical band sawing machine used in the embodiment of the present invention.

FIG. 4 is a front view showing the entirety of the automatic vertical band sawing machine used in the embodiment of the present invention.

FIG. 5 is a schematic view of a conventional holding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic vertical band sawing machine (cutting device) 3 Base 5 Saw blade housing 23 Table 33 Clamping device 35 Cutting width positioning device 53 Holding device 55 Holding device main body 57 Horizontal portion 59 Holding cylinder 63 Upper holding portion 65 Lower holding portion 69 Bracket 71 Avoidance drive cylinder (Avoidance drive means) BS band saw blade CL Cutting line

Claims (4)

[Claims] 1. A holding device provided near a cutting line on a table reciprocating in a left-right direction with respect to a cutting tool for cutting a work is avoided from a table surface, and a work is placed on the table surface. The cutting position of the work is positioned on the cutting line, and the pressing device is returned onto the positioned work, and the work is pressed from above by the pressing device, and the table is moved forward in the direction of a cutting tool to move the table. A cutting method characterized by cutting a work. 2. A table on which a work is placed is provided on a base provided with a cutting tool for cutting the work so as to be reciprocally movable in the left-right direction with respect to the cutting tool, and is located near the cutting line on the table. A pressing device comprising a pressing device main body provided as above and an upper pressing portion provided on the pressing device main body so as to be able to ascend and descend so as to press the work on the table from above is provided, and the pressing device main body is placed on the table surface. A cutting device characterized by being provided so as to be able to avoid the cutting process. 3. The cutting apparatus according to claim 2, wherein the holding device main body has a gate shape and includes a plurality of upper holding portions in the holding device body. 4. The cutting apparatus according to claim 2, wherein the holding device main body is rotatably provided from a surface of the table in a direction to avoid the work when the work is carried in.