JP3313845B2 - Saw machine chip removal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sawing machine such as a horizontal band sawing machine, a vertical band sawing machine and a circular sawing machine, which removes chips attached to the saw blade when the work is cut by the saw blade. The present invention relates to an apparatus for removing chips from a sawing machine.

[0002]

2. Description of the Related Art Conventionally, for example, in a horizontal band sawing machine as a sawing machine, chips are generated when a work is cut with a saw blade. The generated chips enter the saw blade gullet,
There is a risk of sticking to this part.

As a chip removing device for removing chips attached to a saw blade, for example, Japanese Patent Application Laid-Open No.
No. 46711 is known. That is, the rotatable brush provided on the brush support member is pressed against the stopper member by the biasing force of the spring, and the amount of overlap between the saw blade and the brush is automatically adjusted.

In addition, the number of revolutions of the brush for removing chips adhering to the saw blade is changed in proportion to the change in saw speed by being connected to a drive motor for rotating a drive wheel by a gear or the like. Alternatively, the drive motor for rotating the drive wheel and the drive motor for rotating the brush are simultaneously controlled by one inverter to change the rotation speed of the brush.

[0005]

When the brush in the above-mentioned conventional chip removing device is worn and its diameter becomes small, the peripheral speed changes. When the peripheral speed changes,
Since the passing length of the brush per saw blade becomes short, there is a problem that it becomes difficult to remove the attached chips.

That is, since there is a relationship of V = πdN between the peripheral speed V of the brush, the diameter d of the brush, and the number of revolutions N, the time for one saw blade to pass through the width A of the brush is represented by t. Then, the passing length L of the brush is L = (πNt / 60) · d, and the length L is directly proportional to the diameter d. Therefore, if the change in the diameter of the brush is Δd, the reduction amount X of the brush length is X = (πNt / 60) · Δd. Since Δd is, for example, 0 to 60 mm, d = 15
At ^0φ , there was a problem of about 40% reduction.

An object of the present invention is to improve the above problem by increasing the rotational speed of the brush in proportion to the amount of wear of the brush so that the peripheral speed of the brush can always be maintained at the optimum peripheral speed. An object of the present invention is to provide a device for removing chips from a board.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to rotatably support a circular brush provided on a saw blade housing having a saw blade for removing chips attached to the saw blade. A rotatable brush support member, a stopper member provided at a position close to the saw blade, and a brush abutting upon rotation of the brush support member, a driving means provided on the brush support member for rotating the brush, and a brush Means for detecting the amount of wear of the brush, and rotation of the driving means so that the peripheral speed of the brush becomes a preset optimal peripheral speed according to the amount of wear of the brush detected by the amount of wear of the brush. And a control device for controlling the cutting device.

It is preferable that the brush wear amount detecting means is a turning angle detecting means for detecting a turning angle of the brush supporting member, or a diameter detecting means for detecting an actual diameter of the brush. is there.

The rotation angle detection means may be a detection means for detecting a rotation angle of a hinge pin on which the brush support member is rotated, or a position when the brush support member is rotated. Preferably, it is a position detecting means for detecting.

[0011]

By using the apparatus for removing chips from a sawing machine according to the present invention, the brush supporting member is rotated in the direction of the stopper member, and the rotatable brush provided on the brush supporting member comes into contact with the stopper member. Thus, the tooth tip of the brush enters the saw blade by a predetermined amount.

In this state, by driving the driving means, the brush is rotated at the optimum peripheral speed, and the chips attached to the saw blade being cut are removed. Then, the wear amount of the brush from which the chips are removed is constantly detected by the brush wear amount detecting means. When the detected amount of wear of the brush is taken into the control device, the control device controls the number of rotations of the brush according to the amount of wear of the brush, and instructs the drive means to set the peripheral speed of the brush to the optimum peripheral speed. Is given. Thus, the chips attached to the saw blade are reliably removed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 6, a horizontal band sawing machine 1 as an example of a sawing machine includes a box-shaped base 3.
Is provided with a work table 5 for supporting the work W, and a main body vise 7 composed of a pair of fixed vise 7a and a movable vise 7b is provided for fixing the work W to a predetermined position on the work table 5. is there. Note that the fixed vise 7a is immovable, and the movable vise 7b is
It is possible to move in the left-right direction (left-right direction in FIG. 6) approaching and moving away from a. The work table 5 is provided on the base 3
Which constitute a part of.

The base 3 is provided with a saw blade housing 11 which can swing up and down via a hinge shaft 9. In order to swing the saw blade housing 11, an elevating cylinder 13 is provided at an appropriate position on the base 3, and a piston rod 15 that can project upward from the elevating cylinder 13 is attached to the saw blade housing 11. Are connected at appropriate positions. Note that the saw blade housing 11 is attached to the base 3.
In addition to the above configuration, a guide post may be erected on the base 3 and the saw blade housing 11 may be moved up and down by being guided by the guide post.

A drive wheel 17 and a driven wheel 19 are rotatably provided in the saw blade housing 11, and an endless saw blade 21 is wound around the drive and driven wheels 17 and 19. The drive wheel 17 is linked to a rotating device (not shown). In order to hold the saw blade 21 substantially perpendicular to the work W supported on the work table 5, the beam member 23 attached to the saw blade housing 11 has a pair of saw blade guides 25a, 25a.
b is provided so that position adjustment is possible. The saw blade guide 25a is stationary, and the saw blade guide 25b is
5a can be moved in the left-right direction approaching or moving away from 5a.

With the above arrangement, the work W is fixed at a predetermined position on the work table 5 by bringing the pair of fixed and movable vises 7a and 7b close to each other. Then, the rotating device is appropriately operated to drive, the driven wheels 17, 19 are rotated, the band saw blade 21 is driven to travel, and the lifting cylinder 13 is appropriately operated to swing the saw blade housing 11 downward. Let it. As a result, the pair of saw blade guides 25
A desired cutting process is performed by the saw blade 21 guided perpendicularly to the workpiece W via a and 25b.

The saw blade housing 11 is provided with a chip removing device 27 for removing the chips attached to the saw blade 21. For details of the chip removing device 27, referring to FIGS. 1, 2, 3, and 4, the saw blade housing 11 is provided with one end of a fixed block 29. Has a fixed frame 31 integrated therein. Brush support member 35 in which the casing shape as a fulcrum hinge pin 33 is provided so as to be swingable to the left and right direction in FIG. 2 to the fixed frame 31. A left end of the hinge pin 33 in FIG. 1 is provided with, for example, an encoder 33E as a brush wear amount detecting means for detecting a wear amount of a brush (described later).

A motor base 37 is attached to a lower portion of the brush support member 35 with a plurality of bolts. On this motor base 37, a driving motor 3 as a driving means is provided.
9 is provided, and a gear box 41 is mounted below the motor base 37. In the gear box 41, for example, a bevel gear is provided on an output shaft of the drive motor 39, and another bevel gear is meshed with the bevel gear. In addition, a rotatable rotating shaft 43 is mounted on the other bevel gear. For example, a wire brush 45 is fitted to the rotating shaft 43 as a circular brush, and is fixed with a tightening screw 47. A cover 47C is attached to the front of the gear box 41 (to the left in FIG. 1) so as to cover the wire brush 45.

With the above configuration, when the drive motor 39 is driven, the rotating shaft 4 is driven via the output shaft and the pair of bevel gears.
The rotation is transmitted to 3. By rotating the rotation shaft 43, the wire brush 45 is rotated at a desired rotation speed.

FIGS. 1 and 2 show the saw blade housing 11.
And as shown in FIG.
9 are attached. A piston rod 51 is provided in the stopper cylinder 49.

The piston rod 51 protrudes downward, and one end of a link 57 is attached to the tip of the piston rod 51 via a pin 55 via an arm member 56. The other end of the link 57 is At one end of a rod 59 extending in the left-right direction. This rod 5
A stopper member 61 is attached to the other end (the left end in FIG. 3) of 9. The rod 59 is attached to the bracket 6
3 is attached to the saw blade housing 11. A pipe 6 is provided above the stopper cylinder 49.
5 is connected to the saw blade housing 11 and the other end of the pipe 65 is connected to the saw blade housing 11. Moreover, the pipe 65 is connected to a hydraulic pressure source via another pipe.

With the above configuration, the hydraulic pressure is supplied to the stopper cylinder 49 from the hydraulic pressure source (not shown) through the pipe 65, and the piston rod 51 is lowered in FIG. As a result, the rod 59 is rotated clockwise in FIG. 2, and the stopper member 61 is rotated from the retreat end position of the two-dot chain line to the forward end position of the solid line. Hydraulic cylinder 49
, The piston rod 51 rises, and the stopper member 61 is avoided from the forward end position indicated by the solid line to the retracted end position indicated by the two-dot chain line.

The brush support member 35 is swingably provided on the fixed frame 31 with a hinge pin 33 as a fulcrum. That is, the brush support member 35 is provided so as to be movable in a direction approaching and separating from the stopper member 61.

More specifically, as shown in FIG. 2, for example, one end of a spring 67 is attached to the brush support member 35 as urging means, and the other end of the spring 67 is connected to the stopper cylinder 49. Mounted on The biasing force of the spring 67 causes the hinge pin 3
2 is always rotated counterclockwise in FIG.

In order to detect the forward end position of the wire brush 45, a proximity switch 69 and a stopper 71 are mounted on a support frame 35B of the brush support member 35 as shown in FIGS. is there.

When the brush supporting member 35 is rotated counterclockwise in FIG. 2 with the hinge pin 33 as a fulcrum, the stopper 71 abuts against the lower surface of the fixed block 29 so that the proximity sensor 67 supports the brush. The forward end position of the wire brush 45 is detected via the member 35.

The fixing block 29 is provided with fixing means 73 for fixing the brush supporting member 35. More specifically, the lock cylinder 75
Is provided. The lock cylinder 75 has first and second cylinder chambers 75A, 75A
B is formed, and a piston rod 77 is integrated with the piston 75P. The piston rod 77 projects rightward in FIG. 4, and is provided with a brake plate 79 via the brush support member 35.

With the above configuration, when hydraulic pressure is supplied to the first cylinder chamber 75A, the piston rod 77 slides leftward in FIG.
Works, and the brush support member 35 is fixed (locked). By supplying the hydraulic pressure to the second cylinder chamber 75B, the brush support member 35 is unlocked.

Next, the overall operation of the chip removing device will be described with reference to the flowchart of FIG. 5. In step S1, the piston rod 51 is operated by the operation of the stopper cylinder 49.
Is lowered, the stopper member 61 is positioned at the forward end position. In step S2, the lock cylinder 79
Is unlocked, the spring 6 is released in step S3.
The brush support member 35 rotates counterclockwise around the hinge pin 33 in FIG. 2 by the urging force of 7, and the wire brush 45 contacts the stopper member 61.

When the wire brush 45 contacts the stopper member 61, the lock cylinder 75 is locked in step S4. Next, in step S5, the stopper cylinder 49
Causes the stopper member 61 to move to the retracted end position. When the stopper 71 provided on the brush support member 35 is abutted against the fixed block 29 in step S6, the proximity switch 69 is brought into contact with the dog 73 and the brush support member 3
5 is detected to be at the forward end position. As a result, an alarm is issued in step S7 to notify the wire brush 45 that the life has expired.

If it is determined in step S6 that the brush support member 35 has not reached the forward end position, it is determined in step S8 whether or not the position of the wire brush 45 is to be adjusted. Return, and if no adjustment is made, the process ends.

Thus, the saw blade 21 and the wire brush 45
Since the adjustment of the overlap amount is performed during cutting, it can be automatically adjusted, and a stable overlap amount can always be obtained. Since the movement direction of the wire brush 45 is fixed (locked) after the adjustment, it is possible to prevent a sudden force acting in the movement direction of the wire brush 45, for example, vibration due to a reaction force from the saw blade 21.

Further, since the stopper member 61 is made of a surface, the stopper member 61 is pressed by a strong force, and is moved to the retreat end position after the adjustment of the stopper member 61. Therefore, the stopper member 61 does not contact the wire brush 45. , The torque of the drive motor 39 is small, and power is saved.
5 can be reduced, and the life can be prolonged.

As shown in FIG. 2, the brush 45 contacts the stopper member 61 at the forward end position (see FIG. 2).
2 ), and a movement positioning device 81 that moves and positions the brush 45 at a position off the stopper member 61 at the forward end position.

More specifically, as shown in FIG. 2, a cylinder 83 is provided at a lower portion of the saw blade housing 11, and the cylinder 83 has a piston rod 85.
Are movably mounted in the left-right direction.

With the above-described configuration, while the workpiece W is being cut by the saw blade 21, that is, as shown in FIG. 2, the piston rod 85 of the cylinder 83 is in the contracted state at the forward end position. Chips attached to the saw blade 21 at the contact position where the brush 45 contacts the stopper member 61 are removed by the rotating brush 45.

When the workpiece W is not cut by the saw blade 21, for example, when the workpiece W is loaded or unloaded, the cylinder 83 is operated and the piston rod 8 is moved.
When the gear box 41 is pushed to the left and the gear box 41 is pushed, the brush support member 35 rotates clockwise in FIG. 2 around the hinge pin 33 as a fulcrum, and the brush 45 moves to a position separated from the stopper member 61. Positioned.
Therefore, while the cutting work is not performed on the workpiece W by the saw blade 21, the brush 45 is detached from the saw blade 21 so that the brush 45 does not wear out. 45 can be extended. Note that the wire brush 45 may be replaced at a position separated from the stopper member 61.

Referring again to FIG. 1, a control device 87 is connected to, for example, the encoder 33E as a brush wear amount detecting means for detecting the wear amount of the brush 45. The drive motor 39 is connected to the control device 87 via a speed controller 89.

With the above-described configuration, while the work W is being cut by the saw blade 21, the wire brush 45 is rotated at the optimum peripheral speed by driving the drive motor 39 to cut the work W attached to the saw blade 21. The powder is removed. Then, as the chips are removed by the wire brush 45 during the cutting process, the wire brush 45 gradually wears, and the brush support member 35 is rotated counterclockwise about the hinge pin 33 in FIG. You. This brush support member 35
Is detected by an encoder 33 </ b> E provided on the hinge pin 33.

The rotation angle detected by the encoder 33E is taken into the control device 87, and the control device 87 calculates the wear amount of the wire brush 45. Further, in the control device 87, V = πdN (V: peripheral speed, d: diameter, N:
From the relationship (rotational speed), in order to always maintain the peripheral speed V at the optimum peripheral speed, the control device 87 increases the rotational speed N in proportion to the reduction amount of the diameter d, that is, the wear amount of the wire brush 45.
Gives a command to the speed controller 89 to increase the rotation speed of the drive motor 39.

Therefore, the peripheral speed of the wire brush 45 can always be maintained at the optimum peripheral speed by increasing the number of rotations of the drive motor 39 in accordance with the wear amount of the wire brush 45, and the cutting speed adhered to the saw blade 21 can be maintained. Powder can be reliably removed. Since the wire brush 45 is always rotated at the optimum peripheral speed, wear of the wire brush 45 can be minimized.

In the above-described embodiment, the rotation angle of the brush support member 35 is detected by the encoder 33E provided on the hinge pin 33 as the brush wear amount detecting means for detecting the wear amount of the wire brush 45. As shown in FIG. 7, the rotational resistance detecting means 91 is connected to the hinge pin 33.
Is provided, the amount of rotation of the hinge pin 33 when the brush support member 35 rotates can be determined by the rotational resistance detecting means 91.
The detection may be performed by using.

As shown in FIG. 8, the rotation angle of the brush supporting member 35 may be detected by position detecting means 93 such as an optical displacement sensor provided on the saw blade housing 11. Absent.

Further, as shown in FIG. 9, the diameter of the rotating wire brush 45 may be directly detected. That is, in FIG.
1, one end of a guide 95 extending in the left-right direction is provided, and a drive motor 97 is attached. A screw 99 connected to the drive motor 97 extends in the left-right direction. An arm member 101 extending in the vertical direction is screwed to the screw 99 and guided by the guide 95. In addition, a contact sensor 103 is provided at the upper end of the arm member 101, for example.

When the drive motor 97 is driven by the above configuration, the screw 99 is rotated, and the arm member 101 is guided by the guide 95 and moves to the left, for example. , The diameter of the wire brush 45 can be detected.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. In the present embodiment, an example of detecting a change in the diameter of the wire brush 45 has been described. Since the optimum peripheral speed of the brush is different, the information may be read by an NC device and the peripheral speed may be automatically adjusted. Further, the present invention is not limited to the automatic adjustment type wire brush, but can be implemented in a manually adjustment type wire brush because the change amount can be detected.

The number of revolutions of the drive motor of the wire brush may be changed not only electrically but also mechanically by a continuously variable transmission or the like. The timing to take in the data and change the peripheral speed of the brush is
A method of taking in a processing start signal may be used, or adjustment may be made at an arbitrary cycle. The material of the brush is not limited to the wire, but may be nylon or the like.

[0049]

As will be understood from the above description of the embodiment, according to the present invention, since the construction is as described in the claims, the amount of wear of the brush diameter can be reduced. By detecting with the detecting means, the rotation speed of the brush can be increased according to the amount of wear of the brush and the peripheral speed of the brush can always be maintained at the optimum peripheral speed, so that the chips attached to the saw blade can be reliably removed. Can be. Further, since the circumferential speed of the brush is always the optimum circumferential speed, the wear of the brush can be minimized.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a chip removing device of the present invention.

FIG. 2 is a right side view in FIG.

FIG. 3 is an explanatory view of a portion for positioning a stopper member at a forward end position and a backward end position.

FIG. 4 is a plan view of FIG.

FIG. 5 is a flowchart of an operation of removing chips with a brush of the chip removing device of the present invention.

FIG. 6 is a front view of a horizontal saw machine according to an embodiment provided with a chip removing device of the present invention.

FIG. 7 is an explanatory diagram for explaining another embodiment of the brush wear amount detecting means which is a main feature of the present invention.

FIG. 8 is an explanatory diagram for explaining another embodiment of the brush wear detecting means which is a main part of the present invention.

FIG. 9 is an explanatory view for explaining another embodiment of the brush wear detecting means which is a main part of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal band saw machine (saw machine) 11 Saw blade housing 27 Chip removal device 33 Hinge pin 33E Encoder (brush wear amount detecting means) 35 Brush support member 39 Drive motor (Drive means) 45 Wire brush (Brush) 61 Stopper member 87 Control apparatus

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23D 55/00 B23D 47/00 B23D 59/00

Claims (5)

(57) [Claims] 1. A rotatable brush support member provided in a saw blade housing having a saw blade for rotatably supporting a circular brush for removing chips attached to the saw blade, and a position close to the saw blade. A brush member, a stopper member provided on the brush support member for rotating the brush, a brush wear amount detecting means for detecting the wear amount of the brush, A control device for controlling the rotation of the driving means so that the peripheral speed of the brush becomes a preset optimal peripheral speed in accordance with the brush wear amount detected by the amount detecting means. Board chip removal device. 2. The saw chip removing device according to claim 1, wherein said brush wear amount detecting means is a turning angle detecting means for detecting a turning angle of said brush supporting member. 3. The apparatus for removing chips from a sawing machine according to claim 1, wherein said brush wear amount detecting means is a diameter detecting means for detecting an actual diameter of the brush. 4. The sawing machine according to claim 2, wherein said turning angle detecting means detects a turning angle of a hinge pin on which said brush supporting member is turned. apparatus. 5. The apparatus for removing chips from a sawing machine according to claim 2, wherein said rotation angle detection means is a position detection means for detecting a position when said brush support member is rotated. .