WO2014162866A1

WO2014162866A1 - Cutting machine, cutting method, and chute

Info

Publication number: WO2014162866A1
Application number: PCT/JP2014/057265
Authority: WO
Inventors: 瀬戸　章男; 政孝鍛代
Original assignee: 株式会社アマダ; 株式会社アマダマシンツール
Priority date: 2013-04-02
Filing date: 2014-03-18
Publication date: 2014-10-09
Also published as: JP2014200859A; JP6154647B2

Abstract

A cutting machine is provided with: a saw blade for cutting a workpiece; and a chute provided below the cutting position at which the workpiece is cut by the saw blade and discharging an object to be discharged, which is originated from the workpiece, along a sloped surface. The chute has: a stationary member provided in the vicinity of the cutting position; and a pivotable flap provided on the opposite side of the stationary member from the cutting position. The stationary member has an upper surface which slopes downward at a first angle. The flap can pivot between a closed position at which the upper surface of the flap is substantially horizontal and an open position at which the upper surface slopes downward at a second angle (> first angle). A first mode which sets the flap to the open position at least when cutting is completed and a second mode which causes the flap to pivot from the closed position to the open position after the cutting is completed are selectively executed according to the length of the object to be discharged. The cutting machine can discharge in a short takt time, an object to be discharged, the discharge being performed without causing problems in the object to be discharged and in the saw blade.

Description

Cutting machine, cutting method and chute

The present invention relates to a cutting machine, a cutting method using the cutting machine, and a chute provided in the cutting machine.

One of the methods for discharging a product obtained by processing a workpiece from a working machine is a BOX discharging method in which the processed product is naturally dropped into a box arranged below. In the BOX discharge method, depending on the type of product, there is a concern that the product is easily damaged, and that the product falls loudly and becomes noisy.

For this reason, a discharge method using a chute that does not easily cause scratches or noise has been proposed. In the processing machine (cutting machine) disclosed in Patent Document 1 below, a chute having an inclined surface for sliding and discharging a product is selected as a receiving base for receiving a cut-off piece (product). be able to. Moreover, in the band saw machine [band saw machine] disclosed in the following Patent Document 2 with a twist angle of 0 ° [twist に angle 下記 0 °], the separated part is slid down inside the endless saw blade. A chute having an inclined surface for discharging is provided.

Japanese Patent No. 3400127 Japanese Unexamined Patent Publication No. 2011-148033

Since the chute disclosed in

Patent Documents

1 and 2 is provided with an inclined surface for discharge below the separated part, the part is not supported from below during processing. Therefore, when a long part is cut off, the leading end of the part to be cut off (particularly immediately before cutting) is tilted downward due to its own weight, and the final part of the cut surface is torn off [torn off ] Burr may be formed.

In order to prevent such burrs, an open / close chute having an inclined surface that can be switched between an inclined position and a horizontal position has been developed. The open / close chute is set to a horizontal position (closed) when machining the workpiece, and is set to an inclined position (opened) when discharging the separated part. The open / close chute is returned to the horizontal position after being discharged (closed).

However, with an open / close chute, the chute needs to be opened and closed during machining with a saw blade, resulting in a longer tact time. As a result, it is difficult to increase the processing efficiency. Further, in the open / close chute, when the inclined surface is in a horizontal position (closed) immediately after cutting, the saw blade is in a state where it can come into contact with the cut part (the work is stopped). There is little risk of contact with the saw blade). For this reason, when the retraction of the saw blade is started immediately after cutting in preparation for the next processing, the saw blade and the separated portion may come into contact with each other, and there is a possibility that a small chip (chipping) occurs in the saw tooth. In order to prevent such chipping, it is necessary to make sure that the portion that has been cut off by making the inclined surface an inclined position (open) before the saw blade is retracted is reliably discharged. However, also in this case, the tact time becomes long.

An object of the present invention is a cutting machine capable of discharging a part cut off with a short tact time without causing a defect in a part cut off from a work or a saw blade, and a cutting method using the cutting machine, And providing a shoot.

A first feature of the present invention is a cutting machine, which is provided below a saw blade that cuts a workpiece, and a cutting position where the workpiece is cut by the saw teeth, and the discharge target derived from the workpiece is inclined. A chute that is discharged along the cutting position, and the chute is disposed on the opposite side of the cutting position with respect to the fixing member adjacent to the fixing member, and a fixing member provided near the cutting position. A pivotable flap provided, wherein the fixing member has a top surface that is inclined downward at a first angle as it leaves the cutting position, and the top surface of the flap is substantially horizontal. The closed position and the open position inclined downward at a second angle larger than the first angle as the upper surface moves away from the cutting position, and the chute is to be discharged Depending on the length of the object The first mode in which the flap is at the open position at the end of cutting and the second mode in which the flap is rotated from the closed position to the open position after the end of cutting are selectively executed. Provide a cutting machine.

According to a second aspect of the present invention, there is provided a cutting method for cutting a workpiece with a cutting machine having a saw blade and a chute, wherein the chute has a closed position where an upper surface thereof is substantially horizontal, and the saw teeth. A flap that is rotatable between an open position that is inclined downward as the workpiece is cut away from the cutting position, and the method has a predetermined length of a discharge object to be cut from the workpiece; It is determined in advance whether or not the length is less than or equal to the predetermined length, and if it is determined that the length is less than or equal to the predetermined length, at least when the workpiece is cut, the flap is set to the open position and determined not to be equal to or less than the predetermined length And cutting the workpiece with the flap as the closed position, and opening the flap from the closed position to the open position after cutting to discharge the discharge target. The law provides.

A third feature of the present invention is a chute that is disposed below a cutting position at which a workpiece is cut and discharges a discharge target derived from the workpiece along an inclined surface, and is provided in the vicinity of the cutting position. A fixing member, and a rotatable flap provided on the opposite side of the cutting position with respect to the fixing member adjacent to the fixing member, and the upper surface of the flap in the open position. A chute is provided in which an end portion close to the cutting position is located at the same position as or below a position of an end portion of the upper surface of the fixing member far from the cutting position.

It is a schematic plan view of the cutting machine of an embodiment. It is a schematic front view of the cutting machine. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is a block diagram of the said cutting machine. It is a top view of the chute | shoot (horizontal position) in the said cutting machine. It is a perspective view of the said chute | shoot (horizontal position). It is a side view of the said chute | shoot (horizontal position). It is a side view of the said chute | shoot (inclination position). It is a perspective view of the said chute | shoot (inclination position). It is a top view which shows the state by which the selector of the said chute | shoot (horizontal position) was rotated. It is a perspective view which shows the state of FIG. It is a side view for demonstrating the operation | movement (short product mode) of the said chute | shoot. It is a side view for demonstrating the operation | movement (long product mode) of the said chute | shoot. It is a side view for demonstrating the 2nd operation | movement in the said long product mode. FIG. 6 is a perspective view for explaining a waiting position [waiting position] of the selector. It is a perspective view for demonstrating the discharge deflection position [ejection deflecting position] of the selector.

A cutting machine 51 according to the embodiment will be described with reference to FIGS. First, a schematic configuration of the cutting machine 51 will be described with reference to FIGS. For convenience of explanation, the vertical and horizontal directions are defined as shown in FIGS.

The cutting machine 51 is a horizontal band saw machine with a twist angle of the saw blade 5 of 0 °. The cutting machine 51 includes a base portion [base] 1 installed on the floor FL, a housing 2 disposed above the base portion 1, and a pair of

wheels

3 and 4 provided horizontally below the housing 2. The [looped over] saw blade 5 wound around the pair of

wheels

3 and 4, and a chute (discharge device) 6 provided on the base portion 1. The housing 2 moves up and down so as to be separated from and in contact with the base portion 1 (see arrow DR1 in FIG. 2). The housing 2 is moved up and down by a lift drive unit KD2 (see FIG. 4). The

wheels

3 and 4 are a drive wheel and a driven wheel, and the drive wheel is rotated by a wheel drive unit KD1 (see FIG. 4). The chute 6 is provided between the pair of

wheels

3 and 4.

FIGS. 1 to 3 show a state after the work W supplied to the cutting machine 51 is cut by the saw blade 5. The part separated from the workpiece W becomes the product Ws. The product Ws (separated part) is a discharge object derived from the work W [ejection object made from the workpiece W]. In FIG. 2, for the

wheels

3 and 4 and the saw blade 5, an upper position (U) and a lower position (L) in the raising / lowering operation of the housing 2 are shown. FIG. 3 shows an upper position (U) and a lower position (L) for the saw blade 5. When the saw blade 5 is in the lower position (L), the workpiece W has been cut.

The schematic configuration of the chute 6 will be described. As shown in FIG. 3, the chute 6 includes a fixed plate (fixed member) 6a disposed on the rear side, and a flap 6b disposed on the front side of the fixed plate 6a. The fixed plate 6a is fixed to the base portion 1 so that the position of the rear end 6a2 of the fixed plate 6a is a distance L1 forward from the front surface position K5b of the rear section of the saw blade 5. The fixed plate 6a is inclined so that the front end is lowered. On the other hand, the flap 6b is rotated around the rotation fulcrum 6b1 by the cylinder SD1 provided below (see arrow DR2 in FIG. 3). That is, the flap 6b has an open position in which the upper surface 6bt is substantially horizontal (horizontal or slightly inclined so that the front portion is lowered) and the front surface of the upper surface 6bt is lowered. Rotate between positions.

As shown in FIGS. 5 and 6, the flap 6b has, on the left side, a fan-shaped expansion portion 6b2 that is expanded frontward and outward. A flange 6b3 erected upward is provided along the left edge of the extended portion 6b2. A flange 6c erected upward is provided along the right edge of the flap 6b. A box-shaped selector 6d having substantially the same side surface shape is attached to the right outer surface of the flange 6c. The flange 6c is fixed not to the flap 6b but to the selector 6d. The flange 6c and the selector 6d are rotated along the upper surface 6bt of the flap 6b about the rear rotation axis CL1 by the cylinder SD2 (see arrow DR3 in FIGS. 1 and 10).

7 and 8, in the cutting machine 51, the pass line PL of the workpiece W is set horizontally. 7 and 8 do not show the selector 6d. The inclination angle θ1 (first angle) of the fixed plate 6a is set so that the front side is lower than the pass line PL. Although the inclination angle θ1 is not limited, it is preferably 30 ° or less, and is set to 15 °, for example.

The inclination angle θ2 at the closed position of the flap 6b is set to 0 ° or an angle at which the flap 6b (upper surface 6bt) is slightly inclined. The inclination angle θ2 when the flap 6b is slightly inclined is, for example, 0.64 °. A case where the inclination angle θ2 is set to 0 ° is referred to as a horizontal mode [horizontal mode], and a case where a minute angle is set to the inclination angle θ2 is referred to as a fine inclination mode [minor slope mode]. These modes will be described later. The figure shows the horizontal mode. The horizontal distance L2 of the flap 6b in the closed position is set to be longer than the horizontal distance L3 between the rear end 6b4 of the flap 6b and the rear end 6a2 of the fixed plate 6a. For example, they are set to L3 / L2 = 0.3.

The inclination angle θ2 (see FIG. 8: second angle) at the open position of the flap 6b is larger than the inclination angle θ1 (first angle) of the fixed plate 6a. Further, the inclination angle θ2 at the open position is not limited, but is set to 35 °, for example. When the flap 6b is in the open position, the rear end 6b4 (end near the cutting position D) of the upper surface 6bt is the same height as or lower than the front end 6a1 (end far from the cutting position D) of the upper surface 6at of the fixing plate 6a. Is set to be located. The cutting position D is shown in FIGS. 1 and 12 to 14.

As shown in FIGS. 5 and 10, the selector 6d is pivotally supported by a support shaft 6b5 provided outside the flap 6b, and is centered on the rotation axis CL1 along the upper surface 6bt of the flap 6b. It can rotate. As shown in FIGS. 10 and 11, the selector 6d has a link arm 6d6, and the tip of the link arm 6d6 is connected to the tip of the rod SD2a of the cylinder SD2. With the stroke of the rod SD2a by the cylinder SD2, the selector 6d and the flange 6c rotate between the standby position (see FIG. 5) and the discharge deflection position (see FIG. 10). The selector 6d and the flange 6c enter the region of the upper surface 6bt of the flap 6b by the rotation thereof. The flange 6c at the discharge deflection position is substantially parallel to the flange 6b3 of the extended portion 6b2.

In the selector 6d, a cylinder SD3 and an extension plate 6d7 are accommodated. The rod SD3a of the cylinder SD3 is extended by the cylinder SD3 and protrudes from the tip 6ds of the selector 6d. When the selector 6d is at the discharge deflection position, the extension plate 6d7 projects from the tip 6ds in parallel with the flange 6c. The extension plate 6d7 is coupled to the tip of the rod SD3a. When the rod SD3a is contracted by the cylinder SD3, the extension plate 6d7 is accommodated in the selector 6d. When the rod SD3a is extended, it protrudes from the tip 6ds. That is, the extension plate 6d7 substantially extends the flange 6c.

¡The operation of cylinder SD2 and cylinder SD3 is interlocked. That is, in a state where the rod SD2a is extended and the selector 6d is in the standby position, the rod SD3a is contracted and the extension plate 6d7 is accommodated in the selector 6d. On the other hand, in a state where the rod SD2a is contracted and the selector 6d is at the discharge deflection position, the rod SD3a is extended and the extension plate 6d7 protrudes from the tip 6ds of the selector 6d to extend the flange 6c. The reason why the extension plate 6d7 is accommodated in the selector 6d when the selector 6d is in the standby position is to avoid contact between the extension plate 6d7 and the front section of the saw blade 5.

As shown in FIG. 4, the operations of the wheel drive unit KD1 and the lift drive unit KD2 and the cylinders SD1 to SD3 described above are performed by the control unit SG (personal computer or the like) provided in the cutting machine 51 (or outside). It is controlled by a control panel equipped with a CPU. Information on the workpiece W and the product Ws is supplied to the control unit SG as processing information J1 from an external server SV or the like. The control unit SG stores the processing information J1 in the storage unit M, and refers to the stored processing information J1 as necessary. Sensor information J2 from a detector SN (a position sensor that detects the vertical position of the housing 2 or a safety optical sensor) provided in the cutting machine 51 is also input to the control unit SG. Control part SG controls operation of cutting machine 51 based on processing information J1, sensor information J2, and input information inputted into an input device (not shown) by an operator.

Next, the operation of the chute 6 will be described with reference to FIGS. First, the control unit SG controls the cutting machine 51 according to the length of the product Ws based on the processing information J1 of the next product Ws. At this time, the chute 6 is controlled to perform any one of two different operations (short product mode or long product mode) according to the length of the product Ws. Specifically, the length Ls of the product Ws depends on the horizontal distance L4 (= L3 + L1: see FIG. 7) between the rear end 6b4 of the flap 6b and the front surface position K5b described above. The mode mode is selected. When the length Ls is less than or equal to the distance L4, the short product mode (first mode) is executed, and when the length Ls exceeds the distance L4, the long product mode (second mode) is executed.

(Short product mode)
In the case of Ls ≦ L4, as shown in FIG. 12, the flap 6b is opened at least at the end of cutting of the workpiece W (product Ws). Since the product Ws is short, the inclination of the workpiece W (product Ws) due to its own weight during cutting can be ignored, and burrs are not formed (almost). After cutting, the product Ws immediately slides down on the flap 6b (arrow DR4) and is placed on the conveyor CB and the like outside the cutting machine 51. In the short product mode, ascending of the saw blade 5 (housing 2) can be started immediately after cutting (or simultaneously) to prepare for the next processing.

(Long product mode)
In the case of Ls> L4, as shown in FIG. 13, when the workpiece W is cut, the flap 6b is closed, and the leading end of the workpiece W (product Ws) is placed on the flap 6b. After cutting, as shown in FIG. 14, the flap 6b is rotated to the open position (arrow DR5). As a result, the product Ws slides down on the flap 6b (arrow DR6) and is placed on the conveyor CB or the like outside the cutting machine 51. Since the product Ws is separated from the saw blade 5 by starting the rotation of the flap 6b to the open position, the saw blade 5 (housing 2) starts to rise immediately after (or simultaneously with) the rotation of the flap 6b, and the next machining is performed. Prepare for.

As described above, in the cutting machine 51 of this embodiment, the short product mode or the long product mode can be selectively performed according to the length Ls of the product Ws. When the length Ls of the product Ws is short (short product mode), the workpiece W (product Ws) is not tilted by its own weight, so that no burr is formed. That is, since it is not necessary to support the workpiece W (product Ws) from below, the flap 6b is opened before or during cutting in the short product mode (that is, the flap 6b is opened at least at the end of cutting). Since the product Ws is discharged by sliding down the inclined surface (the upper surface 6bt of the inclined flap 6b), there is almost no risk of scratches or noise. Further, since the product Ws is immediately discharged through the inclined flap 6b after cutting, the saw blade 5 can be lifted for the next processing immediately after cutting. Accordingly, no chipping occurs in the saw blade of the saw blade 5, and the tact time is not increased.

On the other hand, when the length Ls of the product Ws is long (long product mode), since the workpiece W (product Ws) is supported from below by the flap 6b until the end of cutting, the workpiece W (product Ws) does not tilt. Therefore, no burr is formed at the final portion of the cut surface. Further, since the product Ws is slid down along the inclined surface (the upper surface 6bt of the inclined flap 6b) when the flap 6b is opened, there is almost no risk of scratches or noise. In addition, the rising of the saw blade 5 for the next processing is also performed after the product Ws is separated from the saw blade 5 by the rotation of the flap 6b, so that the saw blade of the saw blade 5 is not chipped.

Next, the fine tilt mode or the horizontal mode related to the closed position of the flap 6b will be described. In the slight inclination mode, the inclination angle θ2 at the closed position of the flap 6b is not substantially equal to 0 °, and the flap 6b is rotated at high speed from the closed position to the open position. In the horizontal mode, the inclination angle θ2 at the closed position of the flap 6b is 0 °, and the flap 6b is rotated stepwise from the closed position to the open position.

The workpiece W is cut in the rear section of the saw blade 5, but in the long product mode, there is a concern that the product Ws sliding down along the flap 6b and the front section of the saw blade 5 may come into contact. In consideration of such a case, the fine tilt mode or the horizontal mode is selectively executed. When the flap 6b is rotated at a high speed from the closed position to the open position immediately after the cutting of the product Ws, the product Ws separated by the rear section of the saw blade 5 is quickly tilted and fast along the upper surface 6bt of the flap 6b. Slide down. For this reason, depending on conditions, the product Ws that slides down may come into contact with the front section of the rising saw blade 5.

When the rotation start timing and the rotation speed of the flap 6b (or the sliding speed of the product Ws) are equivalent to the rising start timing and the rising speed of the saw blade 5, the longer the product Ws, the longer the path of the product Ws. The higher the height from the line PL (the larger the outer diameter of the product Ws), the greater the possibility. The control unit SG makes contact between the product Ws and the saw blade 5 based on the processing characteristics due to the dimensions [dimensions] (the above-described length, height, etc.) and the material of the product Ws, and the timing and speed described above. It is determined whether or not. When it is determined that no contact is made, the slight inclination mode is selected, and when it is determined that contact is made, the horizontal mode in which the flap 6b is opened stepwise is selected.

For example, when the leading end of the product Ws at the time of cutting is close to the front section of the saw blade 5, in order to avoid contact between the front end of the product Ws and the front section of the saw blade 5 due to sliding of the product Ws. Horizontal mode is selected.

<Slight tilt mode>
In the slight inclination mode, the workpiece W is cut while the flap 6b is slightly inclined, and immediately after the cutting, the saw blade 5 starts to be lifted and the flap 6b is rotated to the open position at high speed. The initial inclination angle θ2 of the flap 6b in the closed position in the slight inclination mode is set to a slight angle that allows the product Ws to slide along the upper surface 6bt by its own weight. The product Ws is slightly inclined during the cutting by the initial inclination angle θ2, and the cut surface of the product Ws is separated from the rear section of the saw blade 5. Therefore, the raising of the saw blade 5 can be started immediately after cutting. Further, the product Ws starts to slide immediately after cutting by the initial inclination angle θ2, but the initial sliding speed of the product Ws is low. Therefore, when the product Ws reaches just below the front section of the saw blade 5, the saw blade 5 is sufficiently raised, and the front section of the saw blade 5 and the front end of the product Ws do not come into contact with each other. As a result, the product Ws is discharged without contacting the saw blade 5 (the rear section and the front section).

<Horizontal mode>
In the horizontal mode, the workpiece W is cut with the inclination angle θ2 of the flap 6b = 0 ° (the upper surface 6bt is horizontal), and the flap 6b is slightly rotated immediately after cutting. The inclination angle θ2 of the flap 6b (upper surface 6bt) due to this slight rotation is set to a slight angle such that the product Ws does not slide along the upper surface 6bt due to its own weight. That is, the inclination angle θ2 is set to a slight angle so that the product Ws does not slide down due to friction. The product Ws is slightly tilted by the slight rotation of the flap 6b, and the cut surface of the product Ws is separated from the rear section of the saw blade 5. Next, the rising of the saw blade 5 is started, and the front section of the saw blade 5 is also separated from the tip of the product Ws. Thereafter, the flap 6b is rotated to the open position at high speed. As a result, the product Ws is discharged without contacting the saw blade 5 (the rear section and the front section).

By selectively executing the two modes described above, it is possible to reliably avoid contact between the saw blade 5 and the product Ws regardless of conditions such as the length of the product Ws. As a result, defects of the product Ws and the saw blade 5 can be prevented more reliably, and highly efficient cutting can be performed with a short tact time. As described above, when the flap 6b is in the closed position (slightly inclined mode or horizontal mode), the upper surface 6bt is substantially horizontal. More specifically, the upper surface 6bt is horizontal in the horizontal mode, and is slightly inclined downward as it is away from the cutting position D in the fine inclination mode.

(End material mode)
In addition, the end material [offcut] Wh of the workpiece W is an object to be discharged similarly to the product Ws. The end material Wh is an unnecessary part separated from the workpiece W and not the product Ws. When the discharge target is not the product Ws but the end material Wh, the cutting machine 51 executes the end material mode other than the short product mode and the long product mode. Based on the processing information J1, the control unit SG determines whether the discharge object to be discharged next is the product Ws or the end material Wh, and executes the end material mode when it is determined as the end material Wh. The cutting machine 51 is controlled.

In the short / long product mode, as shown in FIG. 15, the separated product Ws is discharged straight to the conveyor CB and sent to the next process. On the other hand, in the end material mode, the end material Wh is discharged to the collection box B and discarded (may be reused) as shown in FIG. The control unit SG sets the selector 6d to the standby position in the short / long product mode (discharge of the product Ws) (see FIG. 15), and rotates the selector 6d in the end material mode (discharge of the end material Wh). The discharge deflection position is set (see FIG. 16). Further, the control unit SG projects the extension plate 6d7 in parallel with or after the rotation of the selector 6d. By this control, the discharge direction of the end material Wh is deflected as indicated by an arrow DR7 in FIG. Therefore, the end material Wh is automatically distinguished from the product Ws and collected in the collection box B.

In a horizontal band saw machine such as the cutting machine 51, the lower portion of the front surface position K5b of the saw blade 5 corresponding to the cutting position D needs to be opened for discharging chips and the like. That is, the rotation fulcrum 6b1 of the flap 6b cannot be disposed directly below the cutting position D. Therefore, as shown in FIGS. 3 and 7, the pivot fulcrum 6b1 is set in front of the front surface position K5b and below the pass line PL. Further, the rear end 6b4 is set in front of the rotation fulcrum 6b1 so that the rear end 6b4 (see FIG. 7) does not protrude above the pass line PL when the flap 6b rotates.

In order to fill the gap between the front position K5b and the rear end 6b4, the above-described fixing plate 6a is disposed. If the distance L1 between the rear end 6a2 of the fixed plate 6a and the front surface position K5b is too wide, the short product Ws falls. For this reason, the distance L1 is preferably less than or equal to half the length of the shortest product Ws that can be cut by the cutting machine 51. On the other hand, if the distance L1 is too short, it becomes difficult to discharge chips, so the distance L1 is preferably 2 to 5 mm or more.

The present invention is not limited to the above embodiment, and can be modified within the scope of the invention. For example, in the above embodiment, the upper surface 6at of the fixed plate 6a is formed by a single plane. However, the upper surface 6at may be formed by a plurality of planes having different inclination angles. The plurality of planes may include a horizontal plane. The upper surface 6at may be formed including a curved surface.

In the above embodiment, the extension plate 6d7 is stroked by the cylinder SD3. However, a link mechanism that connects the extension plate 6d7 and the rotation mechanism of the selector 6d may be provided, and the extension plate 6d7 may be mechanically stroked in synchronization with the rotation of the selector 6d.

The cutting machine 51 of the above embodiment is a horizontal band saw machine in which the twist angle of the saw blade 5 is 0 °, but may be a horizontal band saw machine, a circular saw machine or a steel bar cutting machine in which the saw blade is twisted. In such a processing machine (cutting machine), there is no saw blade in contact with the cut product in front of the cutting position D. Therefore, even if the product to be separated is longer than the product that can be separated by the above-described cutting machine 51, the trouble of the product Ws and the saw blade 5 can be more reliably achieved by using the chute 6 of the above embodiment for these processing machines. In addition to prevention, it is possible to perform highly efficient cutting with a short tact time.

Also, the processing machine may be connected to an automatic material feeding system that carries out the separated product. In such an automatic material feeding system, normally, a flat mode in which the product is carried out on the work pass line and a low mode in which the product is carried out below the pass line can be selectively used. Since the above-described chute 6 can operate in accordance with these two modes, the product can be suitably carried out by using the above-described chute 6 in a processing machine connected to the automatic material feeding system.

In the flat mode, the flap 6b is maintained in the closed position from the time of cutting the workpiece to the completion of the conveyance of the separated product. That is, since the product is supported on the pass line, it can be carried out along the pass line by an automatic material feeding system. On the other hand, in the low mode, similarly to the cutting machine 51 described above, the flap 6b can be rotated from the closed position to the open position, and the product can be discharged to the lower automatic material feeding system.

Furthermore, in the above embodiment, the extension plate 6d7 is stroked with the rotation of the selector 6d in order to prevent contact between the extended extension plate 6d7 and the front section of the saw blade 5. In the above-described processing machine (horizontal band saw machine, circular saw machine, or steel bar cutting machine in which the saw blade is twisted), there is no saw blade in contact with the product in front of the cutting position D, so the extension plate 6d7 is stretched. The stroke structure may not be necessary. Alternatively, the selector 6d may be formed long without providing the extension plate 6d7.

Further, the fixed plate 6a does not necessarily have a plate shape. Furthermore, the values of the inclination angle θ1 and the inclination angle θ2 are not limited to the values exemplified in the above embodiment.

According to the above embodiment, when there is a possibility that the long product Ws is inclined by its own weight during cutting, the chute 6 is closed and the product Ws is supported from below (long product mode). On the other hand, since the short product Ws is not likely to be tilted by its own weight during cutting (less), the chute 6 is opened and the product Ws is discharged immediately after cutting (short product mode). As a result, “breaking” immediately before the end of cutting is eliminated, and defects such as burrs can be avoided.

In addition, according to the above-described embodiment, the short product Ws is immediately separated from the saw blade 5 of the product Ws after cutting in the short product mode, so that problems such as chipping of the saw blade of the saw blade 5 can be avoided. In the short product Ws, since the chute 6 is not opened and closed after cutting, the tact time is not increased. Since the product Ws is always discharged along the inclined flap 6b, noise due to scratches or dropping of the product Ws can be reduced. At the time of discharging the end material Wh, the selector 6d is operated so as to deflect the sliding direction of the end material Wh, so that it is not necessary to sort the product Ws and the end material Wh, and the work efficiency can be improved.

Claims

A cutting machine,
A saw blade for cutting the workpiece;
Provided below the cutting position at which the workpiece is cut by the saw teeth, and a chute that discharges the discharge target derived from the workpiece along an inclined surface,
The chute includes a fixing member provided in the vicinity of the cutting position, and a rotatable flap provided adjacent to the fixing member and on the opposite side of the cutting position with respect to the fixing member. ,
The fixing member has an upper surface that is inclined downward at a first angle as the distance from the cutting position increases.
The flap pivots between a closed position where the upper surface is substantially horizontal and an open position where the upper surface is inclined downward at a second angle greater than the first angle as the upper surface moves away from the cutting position. Is possible,
The chute rotates the flap from the closed position to the open position after the end of cutting, according to the length of the discharge object, at least when the cutting ends. A cutting machine configured to selectively execute two modes.
The cutting machine according to claim 1,
The chute further includes a selector that is rotatable along the upper surface of the flap and deflects the sliding direction of the discharge target when the discharge target is an end material of the workpiece. Machine.
The cutting machine according to claim 1 or 2,
The cutting machine in which the edge part near the cutting position of the upper surface of the flap in the open position is the same as or below the position of the edge part of the upper surface of the fixing member far from the cutting position.
A cutting method for cutting a workpiece with a cutting machine having a saw blade and a chute,
The chute has a flap that is pivotable between a closed position where the upper surface is substantially horizontal and an open position inclined downward as the workpiece is cut by the saw blade. And
Said method comprises
It is determined in advance whether or not the length of the discharge object to be separated from the workpiece is a predetermined length or less,
When it is determined that the length is equal to or shorter than the predetermined length, at least when the workpiece is cut, the flap is set to the open position,
When it is determined that the length is not less than the predetermined length, the workpiece is cut with the flap as the closed position, and after the cutting, the flap is opened from the closed position to the open position, and the discharge target is discharged. A cutting method comprising the above.
The cutting method according to claim 4, wherein
The chute further includes a selector rotatable along the upper surface of the flap;
Said method comprises
Determining whether the discharge object is an end material of the workpiece;
A cutting method comprising: turning the flap to deflect the discharge direction of the discharge object when the discharge object is the end material.
The chute is disposed below the cutting position at which the workpiece is cut, and discharges the discharge target derived from the workpiece along the inclined surface,
A fixing member provided in the vicinity of the cutting position, and a rotatable flap provided adjacent to the fixing member on the opposite side of the cutting position with respect to the fixing member,
A chute in which an end portion of the upper surface of the flap close to the cutting position at the open position is the same as or below a position of an end portion of the upper surface of the fixing member far from the cutting position.
A chute according to claim 6,
A chute that is rotatable along the upper surface of the flap and further includes a selector that deflects the sliding direction of the discharge target when the discharge target is an end material of the workpiece.