JP2727421B2 - Method and apparatus for controlling band saw in band saw machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION
The present invention relates to a band saw machine for sawing and cutting a metal lump, and in particular, to prevent bending and vibration of the band saw base metal due to a load, feed, or tension for cutting, and to cool the band. The present invention relates to an apparatus and a method for eliminating fracture of a band saw base metal due to metal fatigue and thermal expansion.

[0002]

2. Description of the Related Art In a conventional band saw machine, as shown in FIG. 1, a band saw base 1 has a vertically long and thin cross section, and a tooth 2 is provided at a lower end thereof.
The band saw base metal 1 is reciprocated on a straight line perpendicular to the paper surface, or continuously moved in one direction in conjunction with the pulling force of the rotating drum. The metal block 4 is cut by the teeth 2 or the blades 3 of the band saw base 1 by moving one or both of them in the vertical direction in which the base 1 and the metal block 4 arranged under the base 1 are relatively in contact with each other. I was

[0003] The band saw base 1 in the above-mentioned conventional technique is as follows.
The cross section is vertically long and thin due to the vertical movement and vertical movement with respect to the paper surface for cutting the metal lump 4, so that the metal lump 4 bends in the left and right direction in FIG. Vibration occurs, and even if it is cooled by a coolant, thermal expansion occurs due to friction at the time of cutting load, causing metal fatigue, fractures occur, and eventually fractures. Even when the fragments are scattered and the worker is harmed and does not break, the band saw table 1 vibrates up and down, right and left, and back and forth, so that the cut surface of the metal block 4 is refracted and becomes coarse or the cut gap is widened. Was occurring.

[0004]

SUMMARY OF THE INVENTION In the present invention, the band saw base metal 1 of the prior art band saw shown in FIG. 1 is vertically elongated and has a thin cross section. The vertical movement between the paper and the paper surface is a repetitive load, causing bending vibration in the left and right direction, thermal expansion due to friction at the time of cutting load is applied, metal fatigue occurs, cracks occur and fracture occurs Therefore, the service life is short and uneconomical, and the worker is harmed by the scattering of broken pieces. Even when the metal block is not broken, the cut surface of the metal block 4 is bent and coarsened, and the cut gap is widened.
Band saw base metal (approximately 0.5 mm) with an extremely thin electrodeposited blade (approximately 0.7 mm) for eliminating ── and forming a narrow cutting gap particularly required for cutting an expensive silicon lump.
It is an object of the present invention to eliminate the above-mentioned deficiencies of the prior art.

[0005]

SUMMARY OF THE INVENTION The present invention is a method and an apparatus for controlling a band saw in a band sawing machine having the following arrangement. `` A band saw that has a vertically elongated cross section and a hole that penetrates the cross section and moves in the direction of the cross section, an object to be cut that is arranged crossing the movement path of the band saw, and one or both of the band saw and the object to be cut An actuating means that operates in the direction of contact, and a detector that is disposed in the vicinity of the band saw to be cut and detects the magnitude of the side saw of the band saw to generate and output a strong or weak electrical signal, and A regulating valve that is arranged close to the body and adjusts the pressure of the fluid to be supplied to high and low in relation to the strength of the electrical signal of the sensing body, and a regulating valve that is arranged close to the regulating valve and a gap is formed around the cross section of the band saw. A control body that is fitted so as to be able to move and move, and presses the fluid of high or low pressure from the regulating valve into the gap and the hole to press the projecting side of the curved band saw toward the immersion side to return the band saw to a straight line. .

[0006]

[Operation] When the band saw 5 cuts the material 10 to be cut by the blade 7, the movement of the feed for cutting the band saw 5 with respect to the material 10 to be cut and the load are interlocked with the unidirectional rotation of the drums 9a and 9b. Moving the band saw 5 in one direction, the extremely thin band saw 5
If the detector 11 detects the curvature and generates and outputs a strong or weak electrical signal depending on the magnitude of the curvature, the control body 12 through which the band saw 5 passes in association with the electrical signal even if the detector 11 detects the curvature. The adjustment valve 16 adjusts the level of the pressure of the fluid 5 to be press-fitted into the gap 13 and immediately returns the band saw 5 to a linear state.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 2 and 3, the band saw 5 of the band sawing machine used in the present invention has a thickness of about 0.5 mm at the lower end of a hardened steel base metal 6 having a vertically long longitudinal section. A fixed blade portion 7 of 0.7 to 0.8 mm is provided,
A hole 8 penetrating in the thickness direction is disposed in the middle of the base metal 6 in the longitudinal direction over the entire surface of the band saw 5 in the longitudinal direction.

As shown in FIG. 4, the band saw 5 is tensioned and wound around the annular drums 9a and 9b which are separated in the left and right directions and rotated in one direction by a rotating external force. The portion 7 is disposed in front of or in the vertical crossing direction with respect to the plane of FIG. 4, and the object 10 such as a silicon lump to be cut is vertically crossed with the intermediate plane of the drums 9 a and b of the band saw 5 with the plane of FIG. By moving the device of the band saw 5 including the drums 9a and 9b and the support device 10 of the object to be cut in a direction in which one or both of them are brought into contact with each other,
The cutting body 10 is configured to be cut by the blade 7 of the band saw 5.

As shown in FIG. 4, detectors 11a and 11b are arranged opposite to each other on the left and right sides of the material to be cut 10 and opposite to the longitudinal side surface of the band saw 5, respectively. The line of magnetic force acts on the band saw 5, and the reflection time or distance of the light beam or the line of magnetic force from the band saw 5 in accordance with the magnitude of the bending distance of the band saw 5 in the vertical direction (the side direction in FIG. 2) parallel to the plane of FIG. It is configured to generate and output a strong or weak electric signal according to the length of the signal.

As shown in FIGS. 2 and 4, the detectors 11a and 11b
The control bodies 12a and 12b made of carbon surround the band saw 5 inside and are movably held to the left or right in FIG. 4 (forward or forward in the vertical direction of FIG. 2). As shown in FIG. 2, the control bodies 12 a and 12 b are provided with a small gap 13 always including the metal base 6 and the blade 7 around the longitudinal section of the band saw 5. Air or cooling water, cutting oil, cutting oil, and the like, which are supplied to the outer ends of the flow paths 14a and b from the outside by a constant pressure, are provided at the outer ends of the flow paths 14a and b. Pressure pipes 17a, b, c, d for press-fitting a fluid 15 such as a lubricating oil into the gap 13 via adjustment valves 16a, b, c, d capable of adjusting their pressures are fixed.

Further, the detectors 11a, 11b and the regulating valves 15a,
In relation to b, c, and d, even if the band saw 5 is curved in the side direction, the curve is returned to a straight line so that the gap 13 is kept constant without the side surface contacting the inner surface of the control body 12. Next, the control valves 16a, b, c, d are adjusted in order to generate a level difference in the pressure of the fluid 15 pumped through the pipe 16 in accordance with the strength of the electric signal output from the detectors 11a, 11b. So as to relate.

At this time, for example, in FIG. 2, when the band saw 5 is curved to the right (the left end face is immersed and the right end face is protruded),
The detector 11a generates and outputs a strong or weak electrical signal corresponding to the distance to the immersion left side surface of the band saw 5 longer than that when the band saw 5 is rectilinear, and outputs the output signal to the right side of the curve of the band saw 5 By applying the pressure of the fluid 15 to the regulating valve 16c of the surface to be higher than the constant pressure of the fluid 15 on the immersion side and pressing the curved right protruding side of the band saw 5 to the left, the band saw 5 is straightened in FIG. It returns to the state and is located in the gap 13 of the control body 12 without contact, and the fluid 1
5 full.

[0013]

[Other Embodiments] In the above-described embodiment, the band saw 5 is provided with the hole 8 which penetrates the base metal 6 in the thickness direction and is opened. However, the one without the hole 8 can be adopted. is there.

[0014]

Since the present invention has the above-described structure, the following effects are obtained and the effects are obtained. When the band saw 5 cuts the material 10 to be cut by the blade portion 7, the movement of the feed for cutting the band saw 5 with respect to the material to be cut 10 and the load of the band saw 5 interlocked with the unidirectional rotation of the drums 9a and 9b. Even if the extremely thin band saw 5 is curved to the left and right in the longitudinal section due to the one-way movement, when the detector 11 detects the curvature and generates and outputs a strong or weak electric signal depending on the degree of the curvature, the detection object 11 is related to the electric signal. The adjusting valve 16 adjusts the level of the pressure of the fluid 15 to be pressed into the gap 13 of the control body 12 through which the band saw 5 passes, and immediately returns the band saw 5 to a linear state.
Does not cause metal fatigue or thermal expansion due to the repeated load, so there is no crack or breakage, there is no risk of shards being scattered, the cutting operation is easy, the life is long, and the control body 12 is not contacted. Therefore, the band saw 5 and the control body 12 do not wear out, so that both of them have a long service life, and the cut object 10 has a narrow cutting gap, a smooth cut surface, and a thin cut piece.
In the case where the band saw 5 is provided, the stress easily escapes from the hole 8 when the band saw 5 is bent, so that the band saw 5 is quickly returned to the linear state, metal fatigue is further prevented, and the band saw 5 is separated from the control body 12. When heading to the drum 9, the fluid 15 attached to the outer peripheral surface of the band saw 5 is easily discharged from the hole 8, so that the fluid 15 is unlikely to be interposed between the drum 9 and the band saw 5. Rotate without slipping and surely sent.

[0015]

[Brief description of the drawings]

FIG. 1 is a longitudinal section of a conventional band saw.

FIG. 2 is a longitudinal section of a part of the device of the present invention.

FIG. 3 is a side view of the band saw of the present invention.

FIG. 4 is a plan view of the entire apparatus of the present invention.

[0016]

[Explanation of symbols]

 5 band saw 6 base metal 7 blade 8 hole 9a, b drum 10 body to be cut 11a, b detector 12a, b controller 13 gap 14a, b flow path 15 flow body 16a, b, c, d regulating valve 17a , B, c, d pressure tube

Claims (3)

(57) [Claims] 1. A direction in which one or both of a band saw having a longitudinally elongated cross section and a hole having a hole penetrating the cross section and moving in the direction of the cross section, and an object to be cut and arranged crossing the movement path of the band saw are mutually in contact with each other. In relation to the fact that the portion of the band saw close to the object to be cut is curved in the lateral direction, the pressure of the fluid acting through the side surface and the hole of the band saw presses the projecting side of the curve toward the immersion side. A method for controlling a band saw in a band sawing machine, wherein the band saw is returned to a straight line shape. 2. A band saw having a longitudinally straight cross section and moving in the direction of the cross section, an object to be cut which is arranged crossing a movement path of the band saw, and one or both of the band saw and the object to be cut are brought into contact with each other. An operating means that operates in the direction of the band saw, a detector that is disposed in the vicinity of the object to be banded, detects the bending of the band saw in the side direction, generates and outputs an electric signal, and is disposed in proximity to the detector. A regulating valve that regulates the pressure of the fluid to be supplied in relation to the electric signal of the sensing object; and a regulating valve that is arranged close to the regulating valve and is movably fitted around the cross section of the band saw with a gap therebetween. A control body configured to press the protruding side of the curved band saw into the immersion side by pressing the fluid from the gap into the gap to return the band saw to a linear shape. 3. A band saw having a vertically long cross section and a hole penetrating the cross section and moving in the direction of the cross section, an object to be cut and arranged to cross the movement path of the band saw, and one of the band saw and the object to be cut. Alternatively, an operating means for operating both in a direction in which they contact each other, and a detecting device in which the band saw is disposed in the vicinity of the object to be cut and detects the magnitude of the bending of the band saw in the side direction to generate and output a strong or weak electric signal. And a regulating valve arranged in close proximity to the sensing object and for adjusting the pressure of the supplied fluid to a high or low level in relation to the electric signal of the sensing object, and a regulating valve arranged in close proximity to the regulating valve and having a cross section of the band saw. The circumference of the band is movably fitted with a gap, and the fluid of high and low pressure from the regulating valve is pressed into the gap and the hole, and the projecting side of the curved band saw is pressed toward the immersion side to return the band saw to a straight line. A control device for a band saw in a band saw, comprising: