JPH0985527A - Circular saw cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circular saw cutting machine capable of using both high speed steel saw blade and saw blade with cemented carbide tips in one cutting machine. SOLUTION: A cutting machine is provided with a saw blade oscillation stopping means 12 consisting of a pair of both side center rest blocks disposed opposedly to each other to sandwich a saw blade 2 and a braking means to remove the back-lash generated between a final stage gear and a front stage side gear by braking the final stage gear in a saw driving part when a material W to be cut off by the saw blade starts to be fed in. Further, a coolant supply means 14 is provided which has a misting nozzle 24 to supply mist-like coolant to the saw blade 2 and material W to be cut off and a nozzle 26 for liquid to supply liquid-like coolant, and can use selectively both nozzles 24, 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main vise mechanism for gripping a material to be cut before and after a cutting position by a saw blade which is driven to rotate, and a feeding device for gripping the material to be cut and conveying the material to the cutting position. The present invention relates to a circular saw cutting machine which has a material vise mechanism and cuts a material to be cut to a predetermined size.

[0002]

2. Description of the Related Art Saw blades used in circular saw cutting machines include high speed steel saw blades and saw blades with super steel tips such as carbide tips. Thus, in the case of a high speed steel saw blade, the cutting speed of the saw blade is used in the range of 12 to 40 m / min, and in the case of a saw blade with a super steel tip, the cutting speed is 80 to 120.
It is often used in the range of m / min.

As mentioned above, in the case of a high speed steel saw blade,
Since the cutting speed is considerably lower than that of saw blades with super steel tips,
There is little vibration of the saw blade during cutting, and there is little problem that the cutting accuracy decreases due to vibration. On the other hand, in the case of a saw blade with a super steel tip, since the cutting speed is very high at around 100 m / min, considerable vibration is generated during cutting, and therefore a means for suppressing the vibration of the saw blade is required. Become. In addition, in the circular saw cutting machine equipped with a saw blade with a super steel tip, the rotation speed of the saw blade is extremely high as described above, so at the start of cutting into the material to be cut by the saw blade, the final stage of the saw drive unit Due to the backlash formed between the gear and the front gear that meshes with the gear, a reaction force acts on the saw blade to generate a large vibration or impact. Therefore, a circular saw cutting machine using a saw blade with a super steel tip requires a means for removing the above backlash at the start of cutting. In addition, a liquid coolant is preferable for a circular saw cutting machine that uses a high-speed steel saw blade, but in the case of a circular saw cutting machine that uses a saw blade with ultra-steel chips, liquid coolant is used for cutting. It is said that a mist-like coolant is preferable because the super-steel chip, which has become hot by the heat generated at some time, is rapidly cooled, so that the super-steel chip is damaged.

[0004]

Conventionally, a high-speed steel saw blade has been used by equipping a circular saw cutting machine dedicated to this high-speed steel saw blade, and a saw blade with a super steel tip, Two types of circular saw cutting machines were required because they were used by being installed in a circular saw cutting machine exclusively for saw blades with super steel chips. That is, the conventional circular saw cutting machine dedicated to the high speed steel saw blade does not require the steadying means and the backlash removing means as described above, and therefore a suitable liquid coolant supply means is attached to the high speed steel saw blade. On the other hand, in the circular saw cutting machine dedicated to saw blades with super steel tips, those equipped with steady rest means, backlash removing means and mist-like coolant supply means are used. It is necessary to properly use a high-speed steel saw blade and a saw blade with a super steel tip depending on the type of material to be cut, but since it is necessary to provide two types of circular saw cutting machines, the equipment cost has risen. It was

Therefore, the present invention is to provide a circular saw cutting machine in which a high-speed steel saw blade and a saw blade with a super steel tip can be combined into one cutting machine, thereby reducing equipment costs. It is intended.

[0006]

A circular saw cutting machine according to claim 1 of the present invention comprises a main vise mechanism 1 for holding a material W to be cut before and after a cutting position P by a saw blade 2 which is driven to rotate, and In a circular saw cutting machine that has a material feeding vise mechanism 5 that grips a material W to be cut and conveys the material W to a cutting position P, so that the saw blade 2 is sandwiched in a circular saw cutting machine configured to cut the material W to a predetermined size. A pair of steady rest blocks 19, 20 and 2 arranged opposite to each other
The saw blade 2 is formed by braking the saw blade steady rests 12 and 13 composed of 1 and 22 and the final stage gear 33 of the saw drive unit 32.
The braking means 31 for removing backlash generated between the final stage gear 33 and the front side gear 34 meshing with the final stage gear 33 at the start of cutting of the material W to be cut, and a mist shape with respect to the saw blade 2 and the material W to be cut. And mist nozzles 24, 25 for supplying the coolant and a liquid nozzle 26 for supplying the liquid coolant, and a coolant supply means 14 for selectively using both nozzles 24, 25, 26. It is characterized by becoming.

Therefore, according to this circular saw cutting machine, especially when the saw blade with a super steel tip is used at high speed rotation, the saw blade steadying means 12 and 13 can prevent the saw blade 2 from swinging and braking. The means 31 removes the backlash generated between the final stage gear 33 and the front stage gear 34 meshing with the last stage gear 33 at the start of cutting of the material W to be cut by the saw blade 2, so that the saw blade 2 and the saw frame 10 can be removed. It is possible to eliminate the generated vibration, shock, and noise. Further, when the high speed steel saw blade is used, the liquid nozzle 2 of the coolant supply means 14 is used.
6 can be used to supply the liquid coolant, and when using the saw blade with a super steel tip, only the mist nozzles 24 and 25 can be used to supply the mist-like coolant.

According to a second aspect of the invention, in the circular saw cutting machine according to the first aspect, the cutting of the material W to be cut is completed and the main vise mechanism 1
After the release, the feeding material vise mechanism 5 holding the remaining material at the normal retreat position Q1 retracted by the predetermined cutting length is further retracted to the predetermined spread position Q2, and the cutting end face of the material to be cut and the saw blade surface are cut. It is characterized in that it is equipped with a spread device 43 for forming a gap S therebetween. Therefore, according to this circular saw cutting machine, by forming the gap S, when the saw blade 2 retreats from the cutting position P to the standby position, it does not rub against the cutting end surface of the material W to be cut. It is possible to prevent wear and damage of the saw blade with a super steel tip, extend the life of the saw blade, and prevent deterioration of cutting accuracy due to friction with the cutting end face.

A third aspect of the present invention is the circular saw cutting machine according to the second aspect, wherein the spread device 43 is a main vise mechanism 1.
The feed vise mechanism 5 is provided with the main vise opening / closing driving hydraulic cylinder 4 and the conveyance driving hydraulic cylinder 44, respectively, and is pivotally mounted at a fixed position so as to be swingable, and at one end of the swing fulcrum 46. A swing lever 45 having a stopper 47 that regulates the normal retreat position Q1 of the material feeding vise mechanism 5.
And a spring 48 that supports the other end of the swing lever 45 against the backward drive pressure of the material feeding vice mechanism of the transport drive hydraulic cylinder 44 so as to hold the stopper 47 at a predetermined restricting position, and swing. A spread hydraulic cylinder 50 that presses the other end of the lever 45 against the spring 48 to swing and move the stopper 47 in the backward direction of the material feeding vise mechanism 5 is provided. The main vise opening operating side chamber 55 and the lever pressurizing operating side chamber 57 of the spread hydraulic cylinder 50 are connected by a first conduit 58, and a second conduit 59 branched from the first conduit 58 and a main vise opening / closing drive. Main vice closing operation side chamber 5 of the hydraulic cylinder 4 for
It is characterized in that the hydraulic pressure source 62 and the tank 63 are connected via a switching valve 61 to a third pipe line 60 connected to No. 6.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a circular saw cutting machine. In FIG. 1, reference numeral 1 denotes a main vise mechanism for holding a material W to be cut before and after a cutting position P by a saw blade 2. , A fixed vise jaw 3a, a movable vise jaw 3b, and a hydraulic cylinder 4 that drives the movable vise jaw 3b to open and close with respect to the fixed vise jaw 3a. Reference numeral 5 denotes a material feeding vice mechanism that grips the material W to be cut and conveys it to the cutting position P, and is a guide rail (not shown) provided on the material feeding table 6.
Is mounted on a carriage 7 driven by a ball screw mechanism (not shown). This material feeding vise mechanism 5
Is composed of a fixed vise jaw 8a, a movable vise jaw 8b, and a hydraulic cylinder 9 that drives the movable vise jaw 8b to open and close with respect to the fixed vise jaw 8a. The saw blade 2
Equipped with an oscillating saw frame 10 as shown in FIG.
The saw frame 10 is swingable around a pivot 11 so that the saw blade 2 attached to the free end side is moved in a perspective manner with respect to the material W to be cut held by the main vise mechanism 1. Has become.

2 and 3, reference numerals 12 and 13 respectively denote a saw blade steadying means provided on the saw frame 10.
Reference numeral 14 denotes a coolant supply means provided over the saw frame 10 and the base 15 of the main vise mechanism 1. 16
Is a cover body arranged so as to face the frame body 17 with the saw blade 2 interposed therebetween, and can be opened and closed by a hinge 18 interposed between the saw body 2 and the frame body 17. FIG.
Shows a state in which the cover body 16 is closed, and FIG.
6 shows an open state.

The saw blade steadying means 12 comprises a pair of both steadying blocks 19 and 20 which are arranged so as to face each other so as to sandwich the peripheral portion of the saw blade 2 from both sides thereof, and the saw blade steadying means 13 comprises A pair of steady rest blocks 21, which are oppositely arranged so as to sandwich the peripheral portion of the saw blade 2 from both sides at a position spaced from the saw blade steady rest means 12 in the circumferential direction,
It consists of 22. As shown in FIGS. 3 and 4, the steady blocks 19 and 21 on one side of the saw blades 2 and 13 of the saw blade steadying means 12 and 13 are attached to the frame body 17 side of the saw frame 10, and the other Steady rest block 2
0 and 22 are attached to the side of the cover body 16 that can be opened and closed. Also, each steady rest block 19, 20, 21, 2
Reference numeral 2 denotes a base plate 19a, 20a, 21a, 22a and chips 19b, 20b, 21b, 22b that are fixed to the inner surface side of the base plate 19 and perform a substantial steady rest action. It is arranged so that a minute gap (not shown) is formed between the facing side surfaces of the saw blades 21b and 22b and the saw blade 2. In FIG. 4, reference numeral 23 denotes a bolt for fixing the cover body 16 to the frame body 17 at the closed position.

The saw blade steadying means 12, 13 as described above
By providing the saw frame 10 on the saw frame 10, it is possible to suppress the vibration that occurs when rotating at high speed when a saw blade with a super steel tip is used as the saw blade 2. Even when a high-speed steel saw blade is used as the saw blade 2, the saw blade 2 having a considerably large diameter or the saw blade 2 having a smaller saw blade thickness than the diameter may cause vibration. Vibration can be suppressed by the saw blade steady rests 12, 13.

The coolant supply means 14 is shown in FIGS.
As shown in FIG. 2, a plurality of mist nozzles 24, 25 for supplying a mist-like coolant to the saw blade 2 and the material W to be cut.
And a plurality of liquid nozzles 26 for supplying liquid coolant
In addition, the mist nozzles 24, 25 and the liquid nozzle 26 can be selectively used. As shown in the figure, one mist nozzle 24 is attached, for example, to the upper end of the frame body 17 of the saw frame 10 toward the peripheral edge of the saw blade 2, and the other mist nozzle 25.
Is, for example, the mounting arm 2 attached to the frame body 17.
7 is attached to the tip of 7 so that the angle can be adjusted toward the cutting position P, and each mist nozzle 24, 25 is connected to a mist supply source (not shown) via a mist supply conduit 24a, 25a. . In addition, a plurality of liquid nozzles 26
Each have an opening / closing cock 26a, and are arranged toward the cutting position P in a liquid coolant distribution part 28 installed on the base 15 side of the main vice mechanism 1, and the distribution part 28 supplies the liquid coolant. It is connected to a liquid coolant supply source (not shown) via a pipe line 29.

Then, the mist supply pipelines 24a, 25
Although not shown, an opening / closing control valve is provided in the middle of a, the liquid coolant supply source is connected to the liquid coolant supply pipe 29, and the operation is installed on the base 15 as shown in FIG. By operating the switches M and N of the board 30, either one of the mist nozzles 24 and 25 and the liquid nozzle 26 can be selectively used.
The switch M on the operation panel 30 is a selection operation switch for mist, and the switch N is a selection operation switch for liquid. Therefore, when the saw blade with a super steel tip is used, the switch M is operated to move the mist nozzle 24,
25, it is possible to supply only the mist-like coolant to the saw blade 2 and the cutting position P of the workpiece W, and when using a high speed steel saw blade, the switch N is operated to operate the liquid nozzle 26. Thus, only the liquid coolant can be supplied to the saw blade 2 and the cutting position P of the workpiece W.

FIG. 5 shows the braking means 31 for removing the backlash, and the final stage gear 33 of the saw driving section 32 is braked to start the cutting of the workpiece W by the saw blade 2. It is possible to eliminate the backlash that occurs between the step gear 33 and the front gear 34 that meshes with the step gear 33. That is, the braking means 31 includes a brake shaft 35 mounted on the frame body 17 of the saw frame 10.
Is fixed to one end of the saw and the last stage gear 33 of the saw drive unit 32 is
A brake gear 36 meshing with the brake gear 37, a brake disc 37 fixed to the other end of the brake shaft 35, and a pair of brakes arranged opposite to each other so as to sandwich a required peripheral portion of the brake disc 37 from both sides. It is composed of a piece 38 and a brake drive cylinder 39 for driving the both braking pieces 38 forward and backward with respect to both side surfaces of the brake disc 37, and meshes with the final stage gear 33 during rotation of the saw blade 2 by the saw drive portion 32. The brake shaft 35 by the brake gear 36
Rotates, and while the saw blade 2 is rotating, the brake drive cylinder 39 is operated to move both braking pieces 38 to the brake disc 3.
When pressed against 7, the braking force acts on the brake shaft 35,
The front gear 34 is braked by the last gear 33. The saw driving unit 32 is, for example, a motor (not shown) and the gear 4 driven by the motor.
0, an intermediate transmission shaft 41 coaxial with the gear 40, a gear (previous stage gear) 34 fixed to the intermediate transmission shaft 41, and a final stage gear 33 meshing with the gear 34,
This final stage gear 33 is provided integrally with the saw blade drive shaft 42.

Accordingly, when the saw blade 2 is rotated by the saw driving unit 32 and the saw frame 10 is swung to bring the saw blade 2 closer to the cutting position P, the braking means 31 is operated. The front gear 34 is braked by the final gear 33, thereby eliminating the backlash between the gears 33 and 34. Since the backlash is removed in this way, when the saw blade 2 is cut into the material W to be cut, the saw blade does not generate vibration or impact. Therefore, when the saw blade with a super steel tip is used to rotate at high speed, the braking means 31 works effectively.

The circular saw cutting machine is equipped with a spreader 43 as shown in FIG. The spread device 43 further predetermines the feeding material vise mechanism 5 that holds the remaining material at the normal retracted position retracted by the predetermined cutting length after the cutting of the workpiece W is completed and the main vise mechanism 1 is opened. The so-called spread operation is performed in which the saw blade 2 is retracted to the spread position to form a gap between the cutting end surface of the workpiece W and the saw blade 2 surface, and the saw blade 2 cuts by forming the gap. Material W to be cut when exiting from the position P to the standby position
No longer rubbing against the cutting end face of the saw, which prevents wear and damage of the saw blade with ultra-steel tip, extending the life of the saw blade, and preventing deterioration of cutting accuracy due to rubbing against the cutting end face. it can. The spread device 43 will be described below with reference to FIG.

In FIG. 6 (A), reference numeral 44 is a hydraulic cylinder for conveying drive for conveying the reciprocating table 7 of the material feeding vice mechanism 5 along the material feeding table 6, and 45 is a pivot shaft at a fixed position in the cutting machine. A swing lever pivotally attached by
A stopper 47 for restricting the normal retreat position Q1 of the main vise mechanism 1 is provided at one end of the swing lever 45 centered on the (swing fulcrum), and the stopper 47 has one end of the swing lever 45. Provided on the front surface of the section. The normal retreat position Q1 of the main vise mechanism 1 is shown as the rear end position of the carriage 7 that is retracted as shown by the solid line in the figure. 48 is
The stopper 47 is supported at a predetermined position (a position where the stopper 47 can abut the rear end of the carriage 7 at the normal retreat position Q1 of the main vise mechanism 1) on the front side of the other end of the swing lever 45. And a spring for attaching to the attachment member 49. This spring 48 is driven by the pressing force F (see B in FIG. 6) applied to the stopper 47 that abuts the rear end of the carriage 7 when the feeding drive hydraulic cylinder 44 drives the material feeding vise mechanism 5 backward. It has a spring force capable of supporting the other end of the swing lever 45 such that the moment acting in the opposite direction to the other end is larger than the moment acting on the one end of the swing lever 45.

A spread hydraulic cylinder 50 is installed at the other end of the swing lever 45 at a position facing the spring 48. This spread hydraulic cylinder 50
Is to press the other end of the swing lever 45 against the spring force of the spring 48 to swing the stopper 47 in the backward direction of the material feeding vise mechanism 5 as shown by the phantom line, that is, the spread operation. The piston rod 51 of the cylinder 50 is brought into contact with the rear surface of the other end of the swing lever 45. Further, in FIG. 6A, reference numeral 52 supports the other end of the swing lever 45 so as to hold the stopper 48 together with the spring 48 at a predetermined position as shown by a solid line when the spread hydraulic cylinder 50 is not operated. It is a spring assist hydraulic cylinder. The position of the swing lever 45 is regulated by a regulation member 53 so that the stopper 47 does not swing and move forward of the normal retreat position Q1 of the material feeding vise mechanism 5.

FIG. 6B shows a hydraulic circuit of the spread device 43. In the main vise opening / closing driving hydraulic cylinder 4 of the main vise mechanism 1, its piston rod 54 is connected to the movable vise jaw 3b. However, when pressure oil is supplied to the rod side chamber (main vise opening operation side chamber) 55, the movable vise jaw 3b separates from the fixed vise jaw 3a to be in the main vise open state, and conversely, the head side chamber (main vise closing operation side chamber). ) 56, the movable vise jaw 3b approaches the fixed vise jaw 3a and enters the main vise closed state. On the other hand, the hydraulic cylinder 50 for spread is supplied with pressure oil only to the head side chamber (lever pressurizing operation side chamber) 57, and the pressure oil is supplied to the head side chamber 57 to perform the spread operation, and the pressure oil is discharged. When done,
The piston is returned to its original position by the biasing force of the spring 48.

Therefore, the rod side chamber (main vice opening operation side chamber) 55 of the main vise opening / closing drive hydraulic cylinder 4 and the head side chamber (lever pressing operation side chamber) 57 of the spread hydraulic cylinder 50 are connected to the first conduit 58. The second pipeline 59 that is connected by the second pipeline 59 that is branched from the middle of the first pipeline 58 and the third pipeline 60 that is connected to the head side chamber (main vice closing operation side chamber) 56 of the main vise opening / closing drive hydraulic cylinder 4 are By the switching valve 61 provided in the middle of both the pipelines 59, 60,
It is selectively connected to the hydraulic pressure source 62 or the tank 63.

Further, the spring assist hydraulic cylinder 52 supports the swing lever 45 by the piston rod 64, and the head side chamber (lever pressurizing operation side chamber) 65 of the cylinder 52 is provided with the fourth conduit 66. It is connected to the three conduits 60. When pressure oil is supplied to the head side chamber (lever pressurizing operation side chamber) 65 of the spring assisting hydraulic cylinder 52, the piston rod 64 expands and the swing lever 45 moves together with the spring 48 to a predetermined position (stopper 47 The feeding material vise mechanism 5 is supported at the normal retracted position Q1).

In the hydraulic control circuit as described above, when the switching valve 61, which is now in the neutral position a, is switched to the position b, the pressure oil from the hydraulic pressure source 62 flows through the second conduit 59 and the first conduit 58. It is supplied to the rod side chamber (main vice opening operation side chamber) 55 of the main vise opening / closing drive hydraulic cylinder 4 and the head side chamber (lever pressing operation side chamber) 57 of the spread hydraulic cylinder 50. At this time, since the piston rod 51 of the spread hydraulic cylinder 50 is pressed and supported by the spring 48 via the end portion of the swing lever 45, the main vise opening / closing drive hydraulic cylinder 4 is operated in advance to perform the main vise mechanism. 1 is released, and after the piston reaches the stroke end, when the hydraulic pressure of the head side chamber (lever pressurizing side chamber) 57 of the spread hydraulic cylinder 50 becomes larger than the spring pressure of the spring 48, this spread Hydraulic cylinder 50 operates to swing lever 45
6 is pressed, whereby the stopper 47 of the rocking lever 45 is rocked and displaced by a predetermined amount in the backward direction of the material feeding vise mechanism 5 as shown by the phantom lines in FIGS. 6A and 6B. At this time, since the head side chamber (lever pressurizing operation side chamber) 65 of the spring assisting hydraulic cylinder 52 is connected to the tank 63 via the fourth pipe line 66 and the third pipe line 60, the swing lever 45. Does not have a pressure supporting function.

Therefore, in the step of cutting the material W to be cut, the hydraulic cylinder 44 for driving the conveyance is operated while the material W is cut.
When the feeding material vise mechanism 5 is retracted by the reciprocating table 7, the reciprocating table 7 of the material feeding vice mechanism 5 hits the stopper 47 of the swing lever 45, and the reciprocating table 7 is moved to the normal retreat position Q1 as shown by the solid line in FIG. 6A. To be stopped. After the main vise mechanism 1 is opened by the operation of the main vise opening / closing hydraulic cylinder 4 as described above, the stopper 47 of the swing lever 45 is retracted by the material feeding vise mechanism 5 by the operation of the spread hydraulic cylinder 50. When a certain amount of swing displacement in the direction,
The material feeding vise mechanism 5 is normally retracted S from the retracted position Q1 to the spread position Q2 by a length corresponding to the swing displacement of the stopper 47, whereby the cutting end face of the material W to be cut and the saw blade of the saw blade 2 are cut. A gap S is formed between the surface and the surface.

After the material feeding vise mechanism 5 is retracted from the normal retreat position Q1 to the spread position Q2 as described above, the material feed vise mechanism 5 is forwardly driven by the hydraulic cylinder 44 for transport driving, and the material feed vise mechanism is moved. As shown in FIG. 6 (A), the cut length L and the gap S of the material W to be cut are
And (L + S) are conveyed to the cutting position P side. After that, by switching the switching valve 61 to the position c, the first pipe line 58 and the second pipe line 59 are connected to the tank 63 side, and the third pipe line 60 is connected to the hydraulic pressure source 62. The pressure oil in the rod-side chamber 55 of the cylinder 44 is discharged, the pressure oil is supplied to the head-side chamber 56 thereof, the main vise mechanism 1 is closed, and the swing lever 45 causes the spring 4 to move.
8 returns to the original position as shown in the phantom line.

At this time, the head side chamber (lever pressurizing side chamber) 65 of the spring assist hydraulic cylinder 52 is moved to the fourth pipe line 6.
6 and the third hydraulic line 60, the piston rod 64 is extended to support the rocking lever 45 together with the spring 48. The spring assisting hydraulic cylinder 52 is provided with a swing lever 45 by the spring 26.
It has the function of supporting the support of. That is, even if an unexpected situation occurs in which the backward driving force of the material feeding vice mechanism 5 by the transport driving hydraulic cylinder 44 exceeds the pressure supporting force of the rocking lever 45 by the spring 48, the rocking lever 45 is held by this spring. It can be supported in place by the auxiliary hydraulic cylinder 52.

In the spread device 43, the swing lever 45, the spring 48, the spread hydraulic cylinder 50,
The spring assisting hydraulic cylinder 52 and the regulating member 53 are disposed on, for example, one movable block (not shown) that is movable and adjustable in the material feeding table 6 along the material feeding direction, and the material W to be cut is
When the cutting length is changed, the movable block is slid along the material feeding direction according to the change in the cutting length.

In order to perform the spread operation, the conveyance driving means for conveying the material feeding vice mechanism 5 is composed of a ball screw mechanism consisting of a ball screw and a servo motor for driving it, or a rack and pinion and a servo motor for driving this. A rack and pinion mechanism may be used, and such a motor-driven mechanism and the opening / closing drive mechanism of the main vise mechanism 1 may be electrically controlled to perform a spread operation. With such a configuration, the electrical control relationship becomes considerably complicated, and the manufacturing cost becomes very high. On the other hand, according to the spread device 43 configured as described above, the hydraulic cylinder is used for both the opening / closing drive means of the main vise mechanism 1 and the conveyance drive means of the material feeding vise mechanism 5, and the main vise mechanism is used. Since the opening / closing operation of No. 1 and the spread operation of the material feeding vise mechanism 5 are performed by a so-called hydraulic sequence circuit, the operation of two different mechanisms can be performed by one switching valve, and the control can be performed. Can be simplified, and the manufacturing cost can be significantly reduced.

[0030]

According to the circular saw cutting machine of the first aspect of the present invention, the saw blade steadying means for preventing the saw blade from swinging, and the final stage gear of the saw driving portion at the start of cutting of the material to be cut are provided. A braking means for removing backlash generated between the front gears meshing with this, a mist nozzle for supplying a mist-like coolant to the saw blade and the material to be cut, and a liquid nozzle for supplying a liquid coolant are selected. Since it is equipped with a coolant supply means that can be used for various purposes, it requires two types of dedicated machines, a conventional cutting machine dedicated to high-speed steel saw blades and a cutting machine dedicated to saw blades with ultra-steel chips. Instead, one circular saw cutting machine can be used as both a high-speed steel saw blade and a saw blade with a super steel tip, so that the facility cost can be reduced.

According to the second aspect, after the cutting of the material to be cut is completed and the main vise is opened, the feeding material vise mechanism which holds the remaining material at the normal retracted position retracted by the predetermined cutting length is further provided. By equipping with a spreader that retracts to the spread position and forms a gap between the cutting end surface of the material to be cut and the saw blade surface, the material to be cut is cut when the saw blade retreats from the cutting position to the standby position. There is no rubbing against the end face, so the saw blade with super steel tip can be prevented from wear and damage,
It is possible to extend the life of the saw blade and prevent a decrease in cutting accuracy due to friction with the cutting end face.

According to a third aspect of the present invention, a hydraulic cylinder is used for both the opening / closing driving means of the main vice mechanism and the conveyance driving means of the material feeding vice mechanism, and the opening / closing operation of the main vice mechanism and the material feeding vice mechanism are used. Since the spread operation is performed by a so-called sequence circuit of hydraulic pressure, the operation of two different mechanisms can be performed by one switching valve, the control is simple, and the manufacturing cost is significantly reduced. Can be achieved.

[Brief description of drawings]

FIG. 1 is a plan view of a circular saw cutting machine according to the present invention.

FIG. 2 is a side view of the circular saw cutting machine shown in FIG. 1, showing a state where the cover body of the saw frame is closed.

FIG. 3 is a side view of a circular saw cutting machine similar to FIG. 2, showing a state in which a cover body of the saw frame is open.

FIG. 4 is a vertical cross-sectional view showing a saw blade steady rest.

FIG. 5 is a vertical sectional view showing a braking means.

FIG. 6A is a plan view showing a spread device, and FIG. 6B shows a hydraulic circuit of the spread device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 main vise mechanism 2 saw blade 4 main vise opening / closing hydraulic cylinder 5 material feeding vise mechanism 10 saw frame 12 saw blade steadying means 13 saw blade steadying means 14 coolant supply means 15 base 19 steadying block 20 steadying block 24 Mist Nozzle 25 Mist Nozzle 26 Liquid Nozzle 31 Braking Means 32 Saw Drive Part 33 Final Stage Gear 34 Previous Stage Gear 43 Spread Device 44 Conveyor Drive Hydraulic Cylinder 45 Swing Lever 46 Pivot (Swinging Support) 47 Stopper 48 Spring 50 Spread hydraulic cylinder 55 Rod side chamber (main vise opening side chamber) 56 Head side chamber (main vise closing side chamber) 57 Head side chamber (lever pressurizing side chamber) 58 First pipe line 59 Second pipe line 60 Third pipe line Line 62 Hydraulic source 63 Tank 66 Fourth line

Claims (3)

[Claims] 1. A main vise mechanism for gripping a material to be cut before and after a cutting position by a saw blade that is rotationally driven, and a material feeding vise mechanism for gripping the material to be cut and transporting the material to the cutting position. In a circular saw cutting machine configured to cut a material to be cut to a predetermined size, saw blade steadying means composed of a pair of steadying blocks on both sides oppositely arranged so as to sandwich a saw blade, and a final stage of a saw driving unit. Braking means for removing the backlash between the final stage gear and the preceding stage gear meshing with the last stage gear at the start of cutting the workpiece by the saw blade by braking the gear, and a mist for the saw blade and the workpiece. Characterized in that it has a mist nozzle for supplying a uniform coolant and a liquid nozzle for supplying a liquid coolant, and is provided with a coolant supply means capable of selectively using both nozzles. The circular saw cutting machine according to claim 1. 2. After the cutting of the material to be cut is completed and the main vise mechanism is opened, the feeding vise mechanism holding the remaining material at the normal retracted position retracted by a predetermined cutting length is further extended to a predetermined spread position. The circular saw cutting machine according to claim 1, further comprising a spread device that is retracted to form a gap between the cutting end surface of the material to be cut and the saw blade surface. 3. The spread device comprises a main vise mechanism and a material feeding vise mechanism respectively provided with a main vise opening / closing drive hydraulic cylinder and a transport drive hydraulic cylinder, and is pivotally mounted at a fixed position so as to be swingable. A swing lever that has a stopper that regulates the normal retreat position of the material feeding vise mechanism at one end of the dynamic fulcrum, and the other end of the swing lever that drives the transport to hold the stopper at a predetermined restraint position. Feeding vise mechanism for hydraulic hydraulic cylinders, which supports the spring against the backward drive pressure, and the other end of the swing lever is pressed against the spring to move the stopper in the backward direction of the feeding vise mechanism. A spread hydraulic cylinder is provided, and the main vise opening operation side chamber of the main vise opening / closing drive hydraulic cylinder and the lever pressurization operation side chamber of the spread hydraulic cylinder are first provided.
The second pipe line branched from the first pipe line and the third pipe line connected to the main vise closing operation side chamber of the main vise opening / closing drive hydraulic cylinder are connected to each other via a switching valve, and are connected to each other via a switching valve. The circular saw cutting machine according to claim 2, wherein the circular saw cutting machine is connected to a tank.