JPH08229733A - Control method of fluid actuator, control method of sawing machine using this method control method, and this sawing machine - Google Patents

Abstract

PURPOSE: To reduce a cost and improve positioning accuracy of a carriage workpiece, by using in common a flow control valve in a control method of fluid actuator of positioning a positioning control object in a target position, in cut in control of a cutting head and in positioning control of carriage workpiece by a carriage feed cylinder. CONSTITUTION: In the case of positioning a positioning control object in a target position by a fluid actuator, controlling a speed of the fluid actuator by rotation controlling a motor connected to a flow control valve, flow control valve of controlling a cut in speed of cut in cylinder of performing cut in action of a cutting head 5 at cutting time of sawing machine 1 and a flow control valve of controlling a feed speed of carriage feed cylinders 55, 71 of performing carriage action of a workpiece W relating to a cutting position are used in common, to alternately perform control of cut in speed and control of a feed speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a fluid actuator for positioning a work or an apparatus at a target position, a method for controlling a saw machine for cutting a work, and a saw machine.

[0002]

2. Description of the Related Art Conventional sawing machines include horizontal band sawing machines,
A rigid band saw machine is known, and a cutting head having a band saw blade rotatably held is moved toward and away from the work to be processed, and the work is cut. Moreover, the desired position of the work to be processed is fed to the cutting position for cutting.

A cutting cylinder is used to perform the cutting action of the cutting head, and a material feeding cylinder is used to perform the material feeding action of the workpiece at the cutting position. Moreover, the cutting speed of the cutting cylinder is controlled. A flow control valve and a proportional solenoid valve are used to control the feed position of the material feeding cylinder.

[0004]

In the prior art described above, the flow rate control valve controls the cutting speed of the cutting cylinder that performs the cutting operation of the cutting head, and the flow rate control valve that controls the cutting speed of the cutting cylinder. Since the proportional solenoid valve is used for the feed position control, there is a drawback that the cost becomes high.

It is difficult to control a minute flow rate with the proportional control valve. For example, the minimum speed is 100 mm / min.
Since the following cannot be done, there is a problem that the positioning inevitably varies.

An object of the present invention is, for example, to use a flow rate control valve commonly for a control method of a fluid actuator for positioning a work or an apparatus at a target position, a cutting head cutting control, and a work material feeding cylinder positioning control. It is an object of the present invention to provide a saw machine control method and a saw machine with which the cost can be reduced and the positioning accuracy of the workpiece feeding can be improved.

[0007]

In order to achieve the above object, a method for controlling a fluid actuator according to a first aspect of the present invention is such that when the positioning target object is positioned at a target position by the fluid actuator, the speed of the fluid actuator is It is characterized in that it is controlled by rotation control of a motor connected to the flow control valve.

A method for controlling a saw according to claim 2 is
A flow control valve that controls the cutting speed of the cutting cylinder that performs the cutting action of the cutting head when cutting the saw machine,
Characterized by sharing a flow rate control valve that controls the feed speed of a material feed cylinder that feeds a workpiece to a cutting position, and alternately controlling the cutting speed and the feed speed. Is.

A saw machine according to a third aspect of the present invention is a hydraulic machine for operating a cutting cylinder for cutting a cutting head and a material feeding cylinder for feeding a workpiece to a cutting position when the saw is cut. A circuit is provided, and this hydraulic circuit is provided with a switching valve for supplying / discharging the cut cylinder, the piston side of the material feeding cylinder, and the rod side cylinder, and the cut valve is provided in the middle of the return oil passage in which each switching valve is branched and connected. It is characterized in that a flow rate control valve commonly used for both the cylinder and the material feeding cylinder is provided.

A saw machine according to a fourth aspect of the present invention is the saw machine according to the second aspect, wherein the cutting cylinder and the material feeding cylinder are provided with position sensors for respectively detecting a cutting position and a material feeding position. It is characterized in that the rotation of the motor provided in the flow control valve is controlled according to the detected cutting position and feeding position to control the speed of the flow control valve.

A saw machine according to a fifth aspect of the present invention is the saw machine according to the second aspect, wherein a front vise feed cylinder and a rear vise feed cylinder are provided as the material feed cylinders, and a front vise feed cylinder is provided in the hydraulic circuit. It is characterized in that a selection switching valve for selecting and operating the rear vise feed cylinder is provided.

[0012]

According to the fluid actuator control method of the present invention as described above, the rotation control of the motor connected to the flow rate control valve is performed to control the speed of the fluid actuator to perform the positioning control object. The object is accurately positioned at the target position.

According to a second aspect of the present invention, in a method for controlling a saw machine, a flow rate control valve for controlling a cutting speed of a cutting cylinder for cutting a cutting head and a material feeding operation for a cutting position. Since the flow rate control valve for controlling the feed speed of the material feeding cylinder is shared, the cutting speed and the feed speed are alternately controlled.
Only one flow control valve is needed, and the cost can be reduced.

In the saw machine according to the third aspect of the present invention, the hydraulic circuit for operating the cutting cylinder and the material feeding cylinder is switched to supply / discharge to / from the cutting cylinder, the piston side of the material feeding cylinder, and the rod side cylinder chamber. In addition to the valves, a flow rate control valve, which is commonly used for both the cutting cylinder and the material feeding cylinder, is installed in the middle of the return oil path that connects each switching valve. Therefore, the cutting speed and the feed speed are controlled alternately. It is possible to reduce the cost.

By using the saw machine according to the fourth aspect of the present invention, in addition to the configuration according to the second aspect, if the notch cylinder and the material feeding cylinder are provided with position sensors for detecting the notch position and the material feeding position, respectively, Since the rotation of the motor provided in the flow control valve is controlled by the cutting position and the feeding position detected by the position sensor, the speed of the flow control valve is controlled. Thus, the positioning accuracy of the material feeding position can be improved.

By using the saw machine according to the fifth aspect of the present invention, the front vise feed cylinder and the rear vise feed cylinder are provided as the material feed cylinders, and the front vise feed cylinder and the rear vise feed cylinder are selected in the hydraulic circuit. Since the switching valve for selection that operates by the above is provided, the front vise feed cylinder and the rear vise feed cylinder are selected and used, and the positioning accuracy is improved.

[0017]

Embodiments of the present invention will be described in detail below with reference to the drawings.

Referring to FIGS. 5 and 6, for example, a horizontal band saw machine 1 as a saw machine is provided with an upright box-shaped base 3.
And a cutting head 5 which can be raised and lowered with respect to the base 3. The cutting head 5 is pivotally supported on the base 3 by a hinge shaft 7 so as to be vertically rotatable.

The cutting head 5 is the base 3
The cutting cylinder 9 is interposed between the cutting head 5 and the cutting head 5 to move up and down. A driving wheel 13 and a driven wheel 15 around which an endless band saw blade 11 is hung are rotatably supported in the cutting head 5, and the driving wheel 13 is driven by a driving device provided behind the cutting head 5. When driven, the band saw blade 11 is driven to travel so as to perform a cutting action.

The portion of the horizontal band saw blade 11 located in the cutting action area (cutting portion) of the horizontal band saw blade 1 is slidably guided by a pair of guide members 17 and 19 so that the blade edge faces vertically downward. The pair of guide members 17, 19 are
The support arms 21 and 23 are properly attached to the lower end portions thereof, and the support arms 21 and 23 are supported by beam members 25 fixed to the upper position of the cutting head 5 so that their positions can be adjusted. is there.

Further, a cutting material receiving device 27 for mounting and receiving the work W to be cut is mounted on the cutting action area of the base 3, and a fixing vise for clamping and fixing the work W. Jaw 31 and movable vise jaw 33
A main body vice device 29 having the above is attached. Therefore, when the cutting head 5 is lowered from the raised position as shown by the phantom line in FIG. 5, the band saw blade 11 driven by the drive wheel 13 is driven by the main body vice device 2.
The work W fixed on the cutting material receiving device 27 is cut by 9 and the work W can be cut. The cutting speed of the band saw blade 11 with respect to the work W can be controlled by appropriately controlling the lifting cylinder 9 to control the cutting speed (lowering speed) of the cutting head 5.

Further, the cutting chips generated by cutting the work W are not accumulated in the cutting material receiving device 27, but are discharged and removed to a cutting chip removing device provided in the base 3.

As shown in FIG. 6, the movable vise jaw 33 with respect to the fixed vise jaw 31 is moved by the hydraulic cylinder 35 as a fluid cylinder in the direction orthogonal to the longitudinal direction of the work W in the horizontal direction in FIG.
Is to fix. A tip of a piston rod 37 mounted on the hydraulic cylinder 35 is fixed to a rear end of the movable vice jaw 33.

In order to mount and support the work W, a support frame 39 extending vertically in FIG. 6 is integrally connected to the base 3. This support frame 39
A plurality of support rollers 41 for placing and supporting the work W are rotatably supported at one end (upper end in FIG. 6) of the.
A guide rail 43 extending in the material feeding direction (vertical direction in FIG. 6) is laid on the support frame 39.

A rear vise device 45 as a material feeding vise device is slidably supported on the guide rail 43. The rear vise device 45 has substantially the same structure as the main body vise device 29 described above, and includes a fixed vise jaw 47, a movable vise jaw 49, and a movable vise jaw 49 for moving the movable vise jaw 49 back and forth with respect to the fixed vise jaw 47. At the rear end of 49, the tip of a piston rod 53 attached to the hydraulic cylinder 51 is fixed.

Moreover, the rear vise device 45 is connected to the tip of the piston rod 57 mounted on the rear vise feed cylinder 55 extending in parallel with the plurality of guide rails 43, and the rear vise feed cylinder 55 operates. It is moved toward and away from the main body vice device 29.

At the other end (lower end in FIG. 6) of the support frame 39, a plurality of guide rails 59 are laid in order to carry out the cut work W. A front vise device 61 as a material feeding vise device is slidably supported on the guide rail 59. The front vise device 61 has substantially the same structure as the rear vise device 45, and includes a fixed vise jaw 63, a movable vise jaw 65, and a movable vise 6 thereof.
The tip of a piston rod 69 mounted on a hydraulic cylinder 67 is fixed to the rear end of the movable vice jaw 65 so as to move the 5 forward and backward with respect to the fixed vice jaw 63.

Further, the front vise device 61 is connected to the tip of the piston rod 73 mounted on the front vise feed cylinder 71 extending in parallel with the plurality of guide rails 59, and by the operation of the front vise feed cylinder 71. It is moved toward and away from the main body vice device 29.

With the above structure, the work W to be machined placed and supported on the support roller 41 is fixed by the operation of the hydraulic cylinder 51 in the rear vise device 45.
7 and the movable vice jaw 49 are clamped. Further, the work W is fed to the cutting position by a desired length by the operation of the rear vise feed cylinder 55.

By operating the hydraulic cylinder 35 of the main body vise device 29, the fixed vise jaw 31 and the movable vise jaw 3 are moved.
When the work W is clamped by 3 and 4, the rear vise device 45
The fixed vice jaw 47 and the movable vice jaw 49 are unclamped from the work W.

In this state, the cutting cylinder 9 is operated and the band saw blade 11 is driven to travel, whereby the work W is cut. When the cutting process is completed,
The hydraulic cylinder 67 of the front vise device 61 is operated to clamp the work W with the fixed vise jaw 63 and the movable vise jaw 65. The fixed vise jaw 31 and the movable vise jaw 33 of the main body vise device 29 are unclamped. Further, the work W cut by operating the front vise feed cylinder 71 of the front vise device 61 is carried out.

Cutting speed by the cutting cylinder 9,
A flow rate control valve 75 is used to control the feed rate by the rear vise feed cylinder 55 and the front vise feed cylinder 71. A body 77 is integrated with the flow control valve 75 as shown in FIG.
7, a stepping motor 79 as a motor is provided in the upper part of FIG.

The body 77 has a stepping motor 7
Nine output shafts 81 are provided, and a screw shaft 85 is attached to the output shaft 81 via a sliding key 83. A male screw 87 formed on the outer periphery of the lower portion of the screw shaft 85 is screwed into a female screw 89 formed on the inner periphery of the lower portion of the body 77.

Referring to FIG. 3 together with the screw shaft 85, a pin 91 is attached extending in the left-right direction in FIG. The body 8 corresponding to the pin 91
A stopper 93 is attached to the position 5 with a plurality of bolts 95.

A ball 9 is provided at the lower end of the screw shaft 85.
7 is provided, and this ball 97 is in contact with the spool 99 of the flow control valve 75. And spool 9
9 is urged upward by a spring 101 inside the flow control valve 75 so as to always come into contact with the ball 97.

With the above structure, the stepping motor 79
Is driven, the output shaft 81 is rotated clockwise, for example, and the screw shaft 85 is also rotated in the same direction. Therefore, the screw shaft 85 is moved downward with respect to the body 77. As a result, the screw shaft 85 pushes the spool 99 via the ball 97 and the oil flowing into the flow rate control valve 75 is squeezed.

Further, when the screw shaft 85 is rotated clockwise, the pin 91 hits the stopper 93 and the screw shaft 85 cannot be advanced any further. Using this as the origin, the adjusting screw 103 adjusts the flow rate of the flow rate control valve 77 to zero. When the stepping motor 79 is rotated counterclockwise as indicated by an arrow in FIG. 3, the stepping motor 79 comes into contact with the stopper 95 at a position rotated by 330 °, for example. This place has the maximum flow rate.

The origin is set to 0 pulse, and one rotation is 1000
If the pulse stepping motor 79 is used, the maximum flow rate is 1000 pulses × (330/360) = 916 pulses. In order to control the minute flow rate with high accuracy, the flow rate characteristic curve is as shown in FIG.

Next, the control of the cutting speed by the cutting cylinder 9 and the feeding speed by the rear vise feed cylinder 55 and the front vise feed cylinder 71 will be described based on the hydraulic circuit shown in FIG.

In FIG. 1, a rack 107 is integrated with a piston rod 105 mounted on the cutting cylinder 9, and a pinion 109 is meshed with the rack 107. Moreover, the encoder 111 is connected to the pinion 109. Similarly, racks 113 and 115 are integrated with the piston rods 57 and 73 of the rear vise feed cylinder 55 and the front vise feed cylinder 71, respectively.
17, 119 are meshed. Moreover, encoders 121 and 123 are connected to the pinions 117 and 119.

With the above structure, the notch cylinder 9, the rear vise feed cylinder 55, and the front vise feed cylinder 71.
The piston rods 105, 57,
73 is moved to the left in FIG. At that time, the racks 107, 113, 115 also move in the same direction, and the pinion 1
09, 117, 119 rotate to rotate the encoders 111, 1
The movement amounts of the piston rods 105, 57, 73 are detected at 21, 123. That is, the cut amount of the cutting head 5, the material feeding amount of the rear vise device 45, and the front vise device 61 are automatically detected.

In the hydraulic circuit shown in FIG. 1, the notch cylinder 9 has a piston side cylinder chamber 9P and a rod side cylinder chamber 9R. Piping 125, rod side cylinder chamber 9R, pipe 125,
One end of 127 is connected and piping 125,12
The other end of 7 is connected to the B and A ports of the switching valve 129 at the 4-port 3-position position.

The switching valve 129 has a solenoid SOL.
5 and SOL6 are provided. Moreover, the pipe 12
A check valve 131 is provided in the middle of 7.
Pipes 133, 13 are provided at the P and R ports of the switching valve 129.
5, one end of which is connected and piping 133,135
The other end of is connected to the tank T. A pump P is provided in the middle of the pipe 133, and a motor 137 is provided in the pump P. Moreover, the filter 139 is provided at the lower end of the pipe 133. In addition, the pipe 13
A filter 141 is provided in the middle of 5.

A piston side cylinder chamber 55P and a rod side cylinder chamber 55R are formed in the rear vise feed cylinder 55. One ends of pipes 143 and 145 are connected to the piston side cylinder chamber 55P and the rod side cylinder chamber 55R, and the other ends of the pipes 143 and 145 are connected to the B and A ports of the 4-port 3-position switching valve 147. ing.

The switching valve 147 has a solenoid SOL.
1, 2 are provided. Moreover, the pipes 143, 1
In the middle of 45, pilot check valves 149, 15
1 is provided. One ends of pipes 153 and 155 are connected to the P and R ports of the switching valve 147, and the other end of the pipe 153 is connected to the middle of the pipe 133. The other end of the pipe 155 is connected to the A port of the switching valve 157 at the 4-port 3-position position. Moreover, the switching valve 15
The solenoid 7 has solenoids SOL7 and SOL8.

A piston side cylinder chamber 71P and a rod side cylinder chamber 71R are formed in the vise feed cylinder 71. One ends of pipes 159 and 161 are connected to the piston side cylinder chamber 71P and the rod side symbol chamber 71R, and the other ends of the pipes 159 and 161 are connected to the B and A ports of the 4-port 3-position switching valve 163. ing.

The switching valve 163 has a solenoid SOL.
3 and 4 are provided. One ends of pipes 165 and 167 are connected to the P and R ports of the switching valve 163, and the other end of the pipe 165 is connected in the middle of the pipe 153. The other end of the pipe 167 has the B of the switching valve 157.
Connected to a port.

Piping 16 is provided at the P and R ports of the switching valve 157.
One end of 9, 171 is connected and the pipe 169
The other end of is connected to the flow control valve 75 described above. The other end of the pipe 171 is connected in the middle of the pipe 135. Moreover, in the middle of the pipe 169, the check valve 173 and the line filter 1 are sequentially arranged from top to bottom in FIG.
75 are provided. A check valve 177 is arranged in parallel with the line filter 175. The flow rate control valve 75 is connected to the tank T via a pipe 179.

One end of the pipe 181 is connected in the middle of the pipe 127, and the other end of the pipe 181 is connected in the middle of the pipe 169 between the check valve 173 and the line filter 175. Moreover, a pile check valve 183 and a check valve 185 are provided in the middle of the pipe 181 from top to bottom in FIG.

With the above structure, the motor 137 is driven and the pump P is operated so that the filter 1 is removed from the tank T.
Pressure oil is discharged to the pipe 133 via 39. This piping 1
The pressure oil discharged to 33 is the solenoid S of the switching valve 129.
When the OL 6 is turned on, it is supplied to the piston side cylinder chamber 9R of the cutting cylinder 9 through the pipe 125, and the piston rod 105 is moved leftward in FIG. That is, the cutting head 5 descends and the work W
A cut is made in.

The pressure oil discharged from the rod side cylinder chamber 9R passes through the pipe 127, the pile check valve 183, further passes through the check valve 185 and the line filter 175, and flows into the flow rate control valve 75. This flow control valve 75
By controlling the rotation of the stepping motor 79, the flow rate of the pressure oil flowing from the flow rate control valve 75 is controlled.

Moreover, the rotation of the stepping motor 79 of the flow control valve 75 is controlled based on the moving position of the piston rod 105 detected by the encoder 111, and the cutting speed can be controlled as instructed.

When the predetermined position of the work W is positioned at the cutting position, the rear vise feed cylinder 55 is operated. That is, the pressure oil discharged to the pipe 133 is changed by turning on the solenoid SOL2 of the switching valve 147.
It is supplied to the piston side cylinder chamber 55P of the rear vise feed cylinder 55 through the pipe 143 and the pilot check valve 149, and the piston rod 57 is moved leftward in FIG. Thus, with the rear vise device 5 clamping the work W, the work W is fed to the cutting position side.

The pressure oil discharged from the rod side cylinder chamber 55R is supplied to the pipe 145 and the pilot check valve 151.
And is sent to the switching valve 147. The pressure oil sent to the switching valve 147 is sent to the switching valve 157 via the pipe 155,
Further, by turning on the solenoid SOL7, the pipe 1
After passing through 69, the check valve 173, and the line filter 175, it is flown into the flow control valve 75. This flow control valve 75
By controlling the rotation of the stepping motor 79, the flow rate of the pressure oil flowing from the flow rate control valve 75 is controlled.

Moreover, the rotation of the stepping motor 79 of the flow rate control valve 75 is controlled on the basis of the movement amount of the piston rod 57 detected by the encoder 121, and the feed speed can be controlled as instructed.

The cut work W is clamped by the front vise device 61 and conveyed by the operation of the front vise feed cylinder 71. That is, the pressure oil discharged to the pipe 133 is supplied to the piston rod side cylinder chamber 71P of the front vise feed cylinder 71 via the pipe 159 by turning on the solenoid SOL4 of the switching valve 163, and the piston rod 73 is drawn. At 1, it is moved to the left. Thus, the front vice device 61 conveys the cut work W in a clamped state.

The pressure oil discharged from the rod side cylinder chamber 71R is sent to the switching valve 163 via the pipe 161. The pressure oil sent to the switching valve 163 is sent to the switching valve 157 via the pipe 167, and further turns on the solenoid SOL7 to flow into the flow control valve 75 via the pipe 169, the check valve 173, and the line filter 175. .
The flow control valve 75 controls the rotation of the stepping motor 79 to control the flow rate of the pressure oil flowing from the flow control valve 75.

Moreover, the rotation of the stepping motor 79 of the flow rate control valve 75 is controlled based on the moving amount of the piston rod 73 detected by the encoder 123, and the feed speed can be controlled as instructed.

In the case of the horizontal band saw machine 1, the rear vise device 45 and the front vise device 61 for clamping the work W are stopped when cutting the work W, and the cutting head 5 is moved when the work W is fed. Because it's stopped
By providing only one flow rate control valve 75 in the hydraulic circuit shown in FIG. 1 and sharing the flow rate control valve 75, it is possible to alternately control the feed and the cutting of the work W, and to reduce the cost. Moreover, it is possible to improve the positioning accuracy when the work W is fed.

The case where the above-mentioned rear vise feed cylinder 55 is positioned at a position where it extends by 100 mm, for example, will be described in more detail. When the solenoid SOL2 is turned on,
Pressure oil is supplied to the piston side cylinder chamber 55P, pressure oil in the rod side cylinder chamber 55R passes through the pilot check valve 151, and the piston rod 57 of the rear vise feed cylinder 55 extends at high speed.

To avoid overrun, (100 mm-
When the solenoid SOL7 is turned on at the point (15 mm), the pressure oil in the rod side cylinder chamber 55R flows into the flow rate control valve 75. At this time, if the stepping motor 79 is rotated counterclockwise so as to be set to the position of 900 pulses from the origin 0 pulse (before inserting the solenoid SOL7), it becomes clockwise as 85 mm → 90 mm → 95 mm. And the extension speed of the piston rod 57 is gradually reduced. When 99.5 mm → 100 mm, the solenoid is reduced to about 30 mm per minute, and the solenoids SOL2 and SOL7 are simultaneously turned off in consideration of inertia. As a result, the extension of the piston rod 57 is correctly 100 mm. The machine learns the extension speed of each pulse of the flow control valve 75 in advance. This is to correct the solid difference due to the manufacture of the flow control valve 75.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. Although the example in which the spool 99 of the flow rate control valve 75 is controlled by the stepping motor 79 has been described, it may be a servo motor, a DC motor or a hydraulic motor, or may be controlled by a cam. The example in which the rear vise feed cylinder 55 and the front vise feed cylinder 71 are switched by the switching valve 157 using a solenoid valve has been described, but a switching valve using a mechanical valve may be used.

Although the workpiece to be cut by a saw as the positioning object has been described as an example, the positioning of the punching unit for punching the angle is performed by using the flow control valve 75 described in this embodiment. Hydraulic cylinder 5
5 may be used.

[0064]

As will be understood from the above description of the embodiment, according to the invention according to claim 1, the positioning is performed by controlling the speed of the fluid actuator by controlling the rotation of the motor connected to the flow control valve. The object to be used can be accurately positioned at the target position.

According to the second to fourth aspects of the invention, in the saw machine, the cutting head cutting control and the workpiece feeding position control by the feeding cylinder are commonly used by one flow control valve so that they can be selectively used. Therefore, it is possible to reduce the cost by using only one flow control valve, and it is possible to improve the positioning accuracy of the workpiece feeding material.

According to the fifth aspect of the present invention, the rear vise feed cylinder and the front vise feed cylinder are used as the material feeding cylinder, and the selection switch valve is provided in the hydraulic circuit. The cylinder and the cylinder can be selectively used, and the positioning accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a hydraulic circuit for controlling a cutting head and a material feeding cylinder of a saw machine embodying the present invention.

FIG. 2 is a front sectional view of a flow control valve used in the hydraulic circuit in FIG.

3 is a cross-sectional view taken along the line III-III in FIG.

4 is a diagram showing a flow rate characteristic curve of the flow rate control valve shown in FIG.

FIG. 5 is a front view of a horizontal band saw machine as a saw machine embodying the present invention.

FIG. 6 is a plan view of FIG.

[Explanation of symbols]

 1 Horizontal band saw machine (saw machine) 5 Cutting head 9 Cutting cylinder 11 Band saw blade 29 Main body vise device 45 Rear vise device (feed material vise device) 55 Rear vise feed cylinder 61 Front vise device (feed material vise device) 71 Before vise Feed cylinder 75 Flow control valve 79 Stepping motor

Claims (5)

[Claims] 1. When the positioning control target is positioned at a target position by a fluid actuator, the speed of the fluid actuator is controlled by rotation control of a motor connected to a flow control valve. Control method. 2. A flow rate control valve for controlling a cutting speed of a cutting cylinder for performing a cutting operation of a cutting head when cutting a saw, and a feeding speed of a material feeding cylinder for carrying a work material to a cutting position. The method of controlling a saw according to claim 1, wherein the cutting speed control and the feed speed control are alternately performed by commonly using the flow rate control valve. 3. A hydraulic circuit for activating a cutting cylinder for cutting the cutting head and a material feeding cylinder for feeding the work to the cutting position is provided in the hydraulic circuit. A switching valve for supplying / discharging is provided to the piston side and rod side cylinder of the cutting cylinder and the material feeding cylinder, and both the cutting cylinder and the material feeding cylinder are provided in the middle of the return oil passage in which the respective switching valves are branched and connected. A saw machine characterized in that it is provided with a flow control valve that is used in common. 4. The cutting cylinder and the material feeding cylinder are provided with position sensors for respectively detecting a cutting position and a material feeding position, and the flow rate control valve is equipped with the cutting position and the material feeding position detected by the respective position sensors. The saw machine according to claim 3, wherein the rotation of the motor is controlled to control the speed of the flow control valve. 5. A front vise feed cylinder and a rear vise feed cylinder are provided as the material feed cylinders, and a selection switching valve for selecting and operating the front vise feed cylinder and the rear vise feed cylinder is provided in the hydraulic circuit. The saw machine according to claim 3, wherein the saw machine is provided.