JP2896559B2 - Band sawing machine control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention according to this patent application (hereinafter abbreviated as "the invention of the present application") relates to a band sawing machine for sawing and cutting a metal lump. And a method for preventing the bending and vibration of the band saw base metal due to tension and slippage with the rotating drum and cooling it to eliminate the metal fatigue of the band saw base metal, breakage due to thermal expansion and wear of the drum outer peripheral surface. is there.

[0002]

2. Description of the Related Art In a conventional band sawing machine, as shown in FIG.
Or the metal blade 3 is electrically welded, and the band saw base metal 1 is reciprocated on a straight line perpendicular to the paper surface, or the two drums 9a, 9b are separated in parallel by using the band saw base metal 1. The belt is wound tightly on both outer peripheral surfaces of one of the drums, and one of the drums is driven to rotate in one direction, and the other drum is driven to rotate in conjunction with the tension of the base metal 1 to continuously move in one direction. The metal lump 4 was cut by the teeth 2 or the blades 3 of the band saw base metal 1 by moving one or both of them in the vertical direction in which the metal lump 4 and the metal lump 4 disposed below the metal lump 1 are relatively in contact with each other. .

[0003] The thin band saw base 1 in the prior art described above.
Must rotate and move while enduring the load for cutting the metal lump 4, but the driven rotation is transmitted only by the tension of the band saw base metal 1 and the other drum 9 a is driven by the main rotation. In addition, the two drums 9ab and the band saw base metal 1 slip on both contact surfaces to cause abrasion and cutting, and the vertical movement and vertical movement with respect to the paper surface for cutting the metal block 4 cause the cross section to be reduced. Since it is vertically long and thin, it bends in the left and right directions in FIG. 1 under repeated loads in both directions, causing vibration, and even if cooled by a coolant, thermal expansion occurs due to friction during cutting load. Fatigue occurs, cracks occur and eventually break, so the service life is short and uneconomical,
Even if the broken pieces 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.
In this case, there is a defect that the cut surface becomes rough due to refraction and the cut gap is widened.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a defect of the prior art. The band saw base metal 1 of the band sawing machine is vertically long and has a thin cross section. And vertical movement with it occurs, and it is a repeated load to slide between both drums, causing bending vibration in the left and right direction,
The outer peripheral surfaces of both drums and the band saw are worn away, and thermal expansion due to friction at the time of cutting load is applied, causing metal fatigue, cracks are generated and broken, so the life is short and it is uneconomical and the fragments are scattered. Even if it does not cause breakage of the operator, the cut surface of the metal block 4 is refracted and coarsened and the cut gap is widened even when it is not broken. The above-mentioned deficiencies of the prior art are also solved in a band saw base (about 0.5 mm) having an extremely thin electrodeposited blade (about 0.7 mm) for forming a narrow cutting gap required for cutting a large silicon lump. The purpose is to:

[0005]

The present invention is characterized by having the following arrangement. `` Two cylindrical drums supported rotatably about a parallel straight line, a control body that controls both outer peripheral surfaces of both drums to rotate in the same direction at the same rotational speed, An annular band saw having a flat surface with a vertically long linear cross-section and a blade portion at an end surface, and a cut object arranged to intersect with a movement path of the band saw; An operating means for operating one or both of the band saw and the object to be cut in a direction in which the band saw comes into contact with each other; A detector that generates and outputs a signal, a regulating valve that is arranged close to the detector, and adjusts the pressure of the fluid to be supplied to a high or low level in relation to a strong or weak electrical signal of the detecting body; Arranged and fitted movably while maintaining a gap around the band saw section A control body that presses the fluid of high or low pressure into a hole penetrating the gap and the cross section of the band saw to press the protruding side of the curved band saw toward the immersion side to return the band saw to a straight line. .

[0006]

[Operation] The band saw 5 is extremely thin and is wound around both drums 9ab with a weak tension. However, as in the prior art, one of the drums is actively driven to rotate, and the other drum is strongly driven by the band saw 5. Since both drums 9a and 9b are positively rotated in the same direction at the same speed without being passively driven and rotated by the tension, the band saw 5 can reduce the cutting feed movement and load required for cutting the material 10 to be cut. Even if there is, there is no slippage between the band saw 5 and the two drums 9ab, and the band saw 5 rotates reliably.

Further, when the band saw 5 cuts the workpiece 10 by the blade portion 7, the movement and the load of the feed for cutting the band saw 5 with respect to the workpiece 10 and the unidirectional rotation of the drums 9a, b. Even if the extremely thin band saw 5 is curved right and left in the vertical section due to the unidirectional movement of the linked band saw 5, the detection object 1
1 detects the curvature and generates and outputs a strong or weak electrical signal according to the magnitude of the curvature, and in accordance with the electrical signal, the level of the pressure of the fluid 5 pressed into the gap 13 of the control body 12 through which the band saw 5 passes is determined. The adjustment valve 16 adjusts and immediately returns the band saw 5 to a straight state.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS.
The following is a description based on the description. As shown in FIGS. 2 and 3, the band saw 5 of the band sawing machine used in the present invention is formed of a hardened steel base metal 6 having a thickness of about 0.5 mm, a vertically long cross section, and a flat surface band. Approximately 0.7-0.8mm in thickness at lower end
A plurality of holes 8 penetrating in the thickness direction are arranged in the longitudinal direction of the base metal 6 in the longitudinal direction of the band saw 5.

As shown in FIG. 4, two drums 9a each having a cylindrical outer peripheral surface of the same diameter supported rotatably about rotating shafts 9c and 9d of the same diameter on a fixed straight line parallel to and separated from the left and right sides. , 9b and a motor 19 rotatably supported in a clockwise direction around a fixed linear rotation shaft 18 above the middle of the two drums, and the respective rotation shafts 18, 9c of the motor 19 and both drums 9a, 9b. , D are individually wound around the belts 20a, 20b. Both drums 9a, b
Wrap the flat surface of the band saw 5 around each of the
At this time, the blade portion 7 of the band saw 5 is disposed at the front or the front in the direction perpendicular to the plane of FIG. 4, and the object to be cut 10 such as a silicon lump to be cut is positioned at an intermediate position between the drums 9 a and 9 b of the band saw 5. 4
By moving the device of the band saw 5 including the drums 9a and 9b and the supporting device 10 of the object to be cut in a direction in which one or both of them are in contact with each other. The cutting body 10 is cut by the blade 7 of the band saw 5.

As shown in FIG. 4, detectors 11a and 11b are arranged at right and left sides of the workpiece 10 and at opposite sides of the band saw 5 in the longitudinal direction. 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, b 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.

[0014]

In the above embodiment, the band saw 5 is provided with the hole 8 which penetrates in the thickness direction and is opened in the base metal 6 of the band saw 5. However, a hole without the hole 8 may be adopted. Further, the rotating shafts 9c, 9d of the same diameter of the two drums 9a, 9b having the same diameter,
When d is to be rotated in the same direction by two different independent motors, a control device having the same rotation speed of both motors may be interposed between the two motors, and further, when the diameters of both drums are different. In this case, a control device that makes the rotation speeds of the two motors different from each other may be provided between the two motors so that the rotation speeds of the two motors are the same and the rotation speeds of the outer peripheral surfaces of the two drums are the same.

[0015]

Since the present invention has the above-mentioned structure, the following effects are obtained and the effects are obtained. The band saw 5 is extremely thin and is wound around both drums 9ab with a weak tension. However, as in the prior art, one of the drums is actively driven to rotate, and the other drum is passive due to the strong tension of the band saw 5. Since the drums 9a and 9b are both positively rotated in the same direction and at the same speed without the following rotation, the band saw 5 can move the cutting feed required for cutting the workpiece 10 and the load, even if there is a load. There is no slippage between the band saw 5 and the two drums 9ab, so that the rotational feed is not interrupted. Since the band saw 5 is reliably rotated and moved, the outer peripheral surfaces of both drums are not worn without cutting and cutting.

When the band saw 5 cuts the material 10 to be cut by the blade portion 7, the movement of the feed and the load for cutting the band saw 5 with respect to the material to be cut 10 are 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 unidirectional movement of the band saw 5, when the detector 11 detects the curvature and generates and outputs a strong or weak electric signal depending on the degree of the bending, the detection object 11 Since the regulating 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 in relation to the signal, the band saw 5 is immediately returned to the linear state. Since the returned load does not cause metal fatigue or thermal expansion, there is no cracking or breakage, there is no danger of shards being scattered, cutting work is easy, the life is long, and there is no contact with the control body 12, so the band saw 5 And control body 1
2 is not worn, the life of both members is long, the cut body 10 has a narrow cutting gap, the cut surface is smooth, and the cut piece can be formed thin. Further, when the band saw 5 is provided with the hole 8, At the time of the bending, the stress easily escapes from the hole 8, so that the return to the linear state is quickened and the metal fatigue is further prevented, and when the band saw 5 moves away from the control body 12 toward the drum 9, the band saw 5 Since the fluid 15 attached to the outer peripheral surface is easily discharged from the hole 8, the fluid 15 is placed between the drum 9 and the band saw 5.
Is hard to intervene, so that the band saw 5 rotates without slipping in close contact with the drum 9 and is reliably fed.

[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.

[Explanation of symbols]

 5 band saw 6 base metal 7 blade portion 8 hole 9a, b drum 9c, d rotating shaft 10 cut object 11a, b detector 12a, b controller 13 gap 14a, b flow path 15 fluid 16a, b, c, d adjustment Valve 17a, b, c, d Pressure pipe 18 Rotary shaft 19 Motor 20a, b Belt

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-208311 (JP, A) JP-A-6-106415 (JP, A) JP-A-6-106501 (JP, A) 170523 (JP, U) JP-A 4-60613 (JP, U) JP-B 51-48308 (JP, B2) JP-B 57-28610 (JP, B2) JP-B 1-333286 (JP, B2) Japanese Patent Publication 57-2449 (JP, B2) Japanese Patent Publication 5-25609 (JP, B2) Japanese Utility Model 58-2575 (JP, Y2) Japanese Utility Model Publication 53-35823 (JP, Y2) (58) (Int.Cl. ⁶ , DB name) B23D 55/00 B23D 55/06 B23D 55/08

Claims (2)

(57) [Claims] 1. Two cylindrical drums supported so as to be rotatable about respective different parallel straight lines, and controlled so as to positively rotate both outer peripheral surfaces in the same direction at the same speed; An annular band saw having a flat surface with a vertically long linear cross section and a blade portion at an end surface, and an object to be cut which is arranged crossing a movement path of the band saw. An operating means for operating one or both of the band saw and the object to be cut in a direction in contact with each other; and an electric signal generated by arranging the band saw in a position close to the object to be cut and detecting the bending of the band saw in the side direction. A detector that outputs and outputs, a regulating valve that is arranged close to the detector and adjusts the pressure of the supplied fluid in relation to the electric signal of the detector, It is movably fitted around the circumference with a gap, and the fluid from the regulating valve is pressed into the gap. Controls body so as to return to linearly the protruding side of the curved band saw pressed band saw into immersive side, with a capital, band saw of the control device. 2. Two cylindrical drums supported so as to be rotatably separated from each other about respective parallel straight lines and controlled so as to positively rotate both outer peripheral surfaces at the same speed in the same direction, and both drums. An annular band saw having a flat surface with a vertically long linear cross section and a blade portion at an end surface, and an object to be cut which is arranged crossing a movement path of the band saw. An operating means for operating one or both of the band saw and the object to be cut in a direction in which the band saw comes into contact with each other; and A sensing element that generates and outputs an electric signal; a regulating valve that is arranged close to the sensing object and adjusts the pressure of the supplied fluid to a high or low level in relation to the strong or weak electric signal of the sensing object; With a gap around the cross section of the band saw so as to be movable. A control body that presses a fluid of high or low pressure from the valve into a hole penetrating the gap and the cross section of the band saw, presses a projecting side of the curved band saw toward a immersion side, and returns the band saw to a straight line. Also, the control device of the band saw machine.