JPH069820U - Equipment for removing chips from a band saw machine - Google Patents

Abstract

(57) [Summary] [Effect] Chips adhering to the cutting edge of the saw blade during cutting processing on the band saw machine can be completely removed on both sides of the clam, and the cutting ability is reduced and the cutting edge is worn or damaged. Can be effectively prevented to prolong the life of the saw blade, and at the same time, it is possible to avoid bending due to wear imbalance on both sides of the blade tip. [Structure] A saw head 3 having a band saw blade 1 wound between a pair of band wheels 2 and 2, and a wire rotating in a direction orthogonal to a saw blade traveling direction while contacting a peripheral portion of a blade tip portion of the band saw blade 1. A sawdust removing device for a band saw, which is equipped with a brush 4 and a rotation switching means for periodically reversing the rotation of the wire brush 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for removing chips adhering to a saw blade during work cutting by a band saw machine.

[0002]

[Prior art]

 In general, a band saw is equipped with a saw head, which has a band saw blade wound between a pair of band wheels, mounted on a machine base equipped with a mechanism for feeding and fixing a work piece to be cut and moved. The cutting process is performed by pressing the traveling band saw blade against the work to cut it. However, during this cutting, the generated cutting dust adheres to the cutting edge of the saw blade, which reduces the cutting ability and causes wear and loss of the cutting edge.

Therefore, conventionally, as a means for removing the chips adhering to the saw blade, a wire brush that rotates in one direction orthogonal to the traveling direction of the saw blade is attached to the saw head, and the peripheral portion of the wire brush is attached. A method has been adopted in which the attached cutting chips are removed by contacting the cutting edge of the saw blade during cutting.

[0004]

[Problems to be solved by the device]

 However, the band saw blade has a so-called clam in which the blade edges alternately warp in opposite directions.However, in the above-mentioned conventional chip removing means, since the wire brush is rotated only in one direction, the chip is completely removed. Can be removed only on one side of the pair of clam faces, and the sufficient effect cannot be obtained.In addition, the wear of one side of the clam progresses due to the effect of the wire brush that continuously contacts in one direction rotation There was a problem that due to the imbalance of the degree, the cutting surface of the work piece became curved such as spherical surface or sloped surface.

In view of the above situation, the present invention can completely remove the cutting chips adhering to the cutting edge of the saw blade during the cutting process in the band saw machine, reduce the cutting ability due to the cutting powder, and It is an object of the present invention to provide a chip removing device capable of effectively preventing wear and breakage to prolong the life of a saw blade and avoiding bending due to wear imbalance on both sides of the cutting edge.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a device for removing chips from a band saw machine according to the present invention is characterized in that, in a first aspect, a saw head 3 having a band saw blade 1 wound between a pair of band wheels 2 and 2 is provided with a saw. A wire brush 4 which rotates in a direction orthogonal to the traveling direction of the saw blade 1 is attached while the peripheral portion is in contact with the cutting edge portion 10 of the blade 1, and the rotation of the wire brush 4 is periodically reversed. This is a configuration in which the switching means 5 is provided.

According to a second aspect of the present invention, the wire brush 4 is attached to the blade tip portion 10 of the saw blade 1 so as to be adjustable in perspective.

[0008]

[Action]

 Therefore, according to claim 1 of the present invention, since the rotation of the wire brush 4 is periodically reversed, the cutting chips adhering to the cutting edge during cutting are completely removed on both sides of the clam, and both sides of the cutting edge portion 10 are removed. Wear is evenly distributed and no bending due to wear imbalance occurs.

According to the second aspect, it is possible to bring the wire brush 4 close to the cutting edge portion 10 according to the wear of the wire brush 4 without hindering the rotation of the wire brush 4.

[0010]

【Example】

 FIG. 1 shows a band saw machine according to an embodiment to which the present invention is applied, which is provided with a vise device 7 for sandwiching and fixing a work W on an upper part of a machine base 6, and ascending / descending operation via an ascending / descending cylinder 8. The saw head 3 is placed above the left and right columns 9 and 9 standing on the machine base 6. Left and right band wheels 2 and 2 around which a band saw blade 1 is wound are pivotally attached to the saw head 3, and the saw blade 1a on the cutting stroke side, that is, the lower traveling side is a left and right guide arm 11 attached to the saw head 3. , 11 are held vertically with the cutting edge facing downward.

As shown in FIG. 2, a face plate 12 is provided on the front surface of the right frame portion 3 a of the saw head 3, and a band wheel 2 on the drive side is arranged in front of the face plate 12 and the band wheel 2 A brush shaft 13 having a wire brush 4 fixed to the tip thereof is held by the face plate 12 via a bracket 14 below. A saw blade drive motor 15 for rotating the band wheel 2 is mounted coaxially with the band wheel 2 on the rear side of the right frame portion 3a, and a bracket 16 extending inward is provided with a lifting cylinder 8 of the lifting cylinder 8. The piston rod 8a is pivotally connected.

As shown in FIGS. 3 and 4, a mounting cylinder 17a is fixed to the right edge portion of the face plate 12, and a holding cylinder 17b fitted and fixed in the mounting cylinder 17a is provided with a driven pulley 18a. The shaft 18a is rotatably held via bearings 19, 19. The base end of the shaft 18a is connected to the end of the brush shaft 13 via a universal joint 20. Further, the bracket 14 has an elongated hole 14a at an upper portion thereof which extends substantially along an arc centered on the connecting portion of the shafts 13 and 18a, and through which the elongated hole 14a is tightened, the lever 21 is screwed to the face plate 12 side. The brush shaft 13 is rotatably held via a bush 22 while being mounted so that its position can be adjusted within the range of the elongated hole 14a by an operation. Therefore, by operating the lever 21, it is possible to freely adjust the contact pressure of the wire brush 4 to the cutting edge portion 10 and the adjustment due to wear of the wire brush 4.

Therefore, the wire brush 4 is in a tilted position in which the saw blade 1a on the lower traveling side is in a tilted position on the way from the substantially horizontal position of the drive side band wheel 2b to the vertical position of the guide arm 11. It is set so as to come into contact with the blade tip portion 10 of the saw blade 1a. When the saw blade 1 is replaced or the wire brush 4 is worn out, the wire brush 4 can be detached from the blade tip 10 by loosening the lever 21 and lowering the bracket 14.

On the other hand, a brush drive motor 23 is installed on the back side of the face plate 12 so as to be lined up with the mounting cylinder 17a, and a drive pulley 24 and the driven pulley 18 fixed to the rotary shaft 23a thereof are connected to the timing belt 25. It is designed to rotate in conjunction with. Reference numeral 26 is a cover that covers the entire pulleys 18 and 24 and the timing belt 25.

FIG. 5 shows a power / electric circuit for driving the saw blade drive motor 15 and the brush drive motor 23. As shown in the figure, both motors 15 and 23 have a common drive source, and when the start switch 27a of the inverter 27 is turned on, they are simultaneously driven to rotate. A forward rotation magnet switch 5a and a reverse rotation magnet switch 5b are interposed in the power circuit on the side of the brush drive motor 23, and both switches 5a and 5b are set by a timer so that they are switched at fixed intervals. As a result, the wire brush 4 rotates in a state that it is periodically inverted. The inverter 27 has a function of adjusting the traveling speed of the saw blade 1 by frequency conversion, and the rotation speed of the wire brush 4 is also adjusted at the same time by this speed adjustment. Therefore, the traveling speed of the saw blade 1 and the rotation speed of the wire brush 4 always maintain a constant proportional relationship, but normally the ratio of the traveling speed of the saw blade 1 to the peripheral speed of the wire brush 4 is about 1: 2. Is set to.

When cutting the work W, the saw blade 1 is moved by driving the motors 15 and 23, the wire brush 4 is rotated, and the saw head 3 is lowered at a predetermined speed. As a result, the traveling saw blade 1a cuts into the work W, and finally cuts the work W vertically. However, as shown in FIG. While rotating in a direction orthogonal to the running direction of the cutting edge and contacting with each other at regular intervals, the chips adhering to the cutting edge portion 10 during cutting are completely removed from both sides of the set. Therefore, the cutting ability due to the chips is effectively prevented, and the wear and chipping of the cutting edge is effectively prevented to prolong the life of the saw blade 1. Is avoided and high cutting accuracy can be obtained.

In the present invention, various reversing mechanisms other than the magnet switches 5a and 5b exemplified as the rotation switching means for reversing the wire brush 4 at regular intervals can be adopted. Further, the contact position of the wire brush 4 with the saw blade 1 and the reversal time interval can be arbitrarily set.

[0018]

[Effect of device]

 According to the chip removing device for a band saw machine according to claim 1 of the present invention, the chip adhering to the cutting edge of the saw blade can be completely removed on both sides of the clam during cutting, and the cutting with the chip is possible. The ability of the saw blade can be extended by effectively preventing performance deterioration and blade wear and chipping, as well as avoiding bending due to imbalanced wear on both sides of the blade tip, resulting in high cutting accuracy. It has the advantage that the structure is simple and can be applied to various band saws at low cost.

According to the second aspect, it is possible to freely adjust the contact pressure to an optimum contact pressure even if the wire brush wears due to use, and it is possible to use the wire brush stably for a long period of time.

[Brief description of drawings]

FIG. 1 is a front view of a band saw machine of an embodiment to which a chip removing device of the present invention is applied.

FIG. 2 is a front view showing a right frame portion of a saw head of the same band saw machine.

FIG. 3 is a vertical sectional front view of a wire brush portion of the saw head.

FIG. 4 is a side view showing a drive unit of the wire brush.

FIG. 5 is a power electric circuit diagram of a saw blade drive motor and a brush drive motor in the embodiment.

6 is an enlarged vertical sectional view taken along line VI-VI in FIG.

[Explanation of symbols]

 1 band saw blade 2 band wheel 3 saw head 4 wire brush 5a magnet switch (rotation switching means) 5b magnet switch (rotation switching means)

Claims (2)

[Scope of utility model registration request] 1. A saw head, in which a band saw blade is wound between a pair of band wheels, is provided with a wire brush which rotates in a direction orthogonal to a traveling direction of the saw blade while contacting a peripheral portion of a blade edge portion of the saw blade. A sawdust removing device for a band saw, which is installed and provided with rotation switching means for periodically reversing the wire brush. 2. The chip removing device for a band saw machine according to claim 1, wherein the wire brush is attached to a blade tip portion of a saw blade so as to be adjustable in perspective.