JPH04146020A - Detection of remaining material in cutter and device therefor - Google Patents

Abstract

PURPOSE:To surely supply and discharge a work or remaining material so as to improve certainty and reliability by detecting the moving direction of the remainder by a plural number of detectors provided at an interval shorter than the diameter of the remainder, and by sensoring whether a remainder yard is filled with the remainder or not. CONSTITUTION:Remaining material Ws after a work is cut off is carried out by a material delivery device 5 and discharged in a remainder yard 9 by a material supply device 7. A plural number of detectors PSW1, PSW2 are provided in a row in the neighbourhood on the side of the remainder yard 9 of the material supply device 7, and as the distance between detection positions of these detectors SPW1, SPW2 is set shorter than the diameter of the remainder Ws, it is possible to find the moving direction of the remainder Ws since the sensing order of the detectors PSW1, PSW2 differs when the remainder Ws moves from the right direction to the left direction and when it moves from the left direction to the right direction. Additionally, it is possible to detect whether the remainder yard 9 is filled with the remaining material Ws or not by the detectors PSW1, PSW2, and certainty and reliability of the remainder discharge can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method and apparatus for detecting residual material in a cutting machine.

(Prior Art) Conventionally, when cutting a workpiece to a desired length using a cutting machine such as a horizontal bandsaw machine, a material feeding device for feeding the workpiece is provided on one side of the bandsaw machine, for example, to the rear side. There is. A residual material yard is provided on one side in a direction perpendicular to the longitudinal direction of this material feeding device, and the remaining material carried out by the material feeding device is discharged to this material yard, and the remaining material is transferred to the material feeding device. A material feeding device for feeding a workpiece is provided on the other side of the material feeding device in a direction orthogonal to the longitudinal direction. The workpiece is cut to a predetermined length by the cutting machine, and the remaining material is carried out by the material feeding device and discharged to the material yard.

(Problems to be Solved by the Invention) By the way, in the conventional residual material discharge means described above, when the residual materials carried on the chain conveyor as a material feeding device are transferred to the residual materials yard, It was difficult to detect with certainty whether or not it had moved to the leftover material yard.

For example, if the contact point at which the remaining material is transferred from the material supply yard to the remaining material yard is referred to as a transfer surface, the remaining material does not always pass through the transfer surface only once. In some cases, the material collides with the remaining material that has been discharged to the remaining material yard and is bounced back. In addition, if the remaining material overflows into the remaining material yard and is stopped on the transfer surface, moving the chain conveyor, which is the material feeding device, in the opposite direction to the remaining material discharge, the remaining material will be transferred to the chain again. There was also the problem that the material would get on top of the material and be returned to the material feeding device.

The purpose of this invention is to improve the above-mentioned problem.
To provide a method and device for detecting residual materials in a cutting machine, which detects whether a residual material yard has overflowed and there is no space to discharge the residual materials, and improves the certainty and reliability of residual material discharge. be.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention includes a material feeding device for feeding a workpiece to a cutting machine, and a material feeding device provided on one side of the material feeding device. In a cutting machine equipped with a residual material yard and a material feeding device that feeds a workpiece to the material feeding device or discharges residual material carried out by the material feeding device to the residual material yard, the material feeding device may A method of detecting the direction of movement of the remaining material using a plurality of detectors installed near the remaining material yard at intervals shorter than the diameter of the remaining material, and detecting whether the remaining material yard is filled with the remaining material. be.

The present invention also provides a material feeding device for feeding a workpiece to a cutting machine, a residual material yard provided on one side of this material feeding device, and a material feeding device for feeding a workpiece to the material feeding device. and a material feeding device for discharging the remaining material carried out by the material feeding device to the remaining material yard, a plurality of detectors are arranged in a row near the remaining material yard side of the material feeding device, and the distance between the detection positions of the detectors is The diameter of the remaining material is set to be shorter than the diameter of the remaining material to constitute a detection device for the remaining material in the cutting machine.

(Function) By employing the method and device for detecting residual material in a cutting machine of the present invention, the residual material after cutting the workpiece is carried out by the material feeding device and discharged to the residual material yard by the material feeding device.

A plurality of detectors are installed in a row near the remaining material yard side of the material feeding device, and the distance between the detection positions of these multiple detectors is set to be shorter than the diameter of the remaining material, so that the remaining material is The detection order of the detector is different when moving from the left direction to the left direction and when moving from the left direction to the right direction, so it is possible to know the moving direction of the remaining material. Furthermore, the detector can also detect whether the residual material yard is full of residual materials, thereby improving the certainty and reliability of the residual material discharge.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIGS. 9 to 11, for example, a swing type horizontal bandsaw machine 1 as a cutting machine is equipped with a material feeding vise 3, and the rear side of the material feeding vice 3 (the right side in FIG. 9) is A material feeding device 5 for feeding a workpiece W to be cut to the horizontal bandsaw machine 1 is provided extending in the X-axis direction (left-right direction in FIG. 9).

A material feeding device 7 is disposed perpendicularly to the longitudinal direction of this material feeding device 5 and at an appropriate gap in the X-axis direction, and on an extension of this material feeding device 7 (lower side in FIG. 9). A residual material yard 9 is provided.

The specific configuration of the horizontal bandsaw machine 1 and material feeding vise 3 is as follows:
Although detailed description will be omitted since it is already well known, the horizontal bandsaw machine 1 cuts a workpiece W into desired dimensions. Further, the material feeding vice 3 is provided with a vice that grips the workpiece W, and can freely move back and forth while gripping the workpiece W.
The moving means is, for example, a rack and pinion system driven by an electric motor. A length measuring means for detecting the amount of movement by a detection member such as a pulse encoder is provided on the binion side.

The material feeding device 5 includes a rotatable roller 1 provided between support frames 11 and 13 and supported by a support member 15.
7 are arranged at appropriate gaps in the X-axis direction. As shown in FIG. 10, each roller 17 is provided with a plurality of sprockets 19 at appropriate positions, and a chino 21 is wound around each sprocket 19.

Furthermore, as shown in FIG. 10, a drive motor 23 is attached, and one of the sprockets 19 is fitted onto the output shaft of this drive motor 23.

With the above configuration, when the drive motor 23 is driven, the sprocket 19 fitted to the output shaft is rotated, and the chino 2 is run and rotated in the X-axis direction (the left-right direction in FIGS. 9 and 10). , each roller 17 is rotated. Therefore, the work W placed on each roller 17
is fed to the horizontal bandsaw machine 1, and the remaining material WS is returned to the material feeding device 7 side. Although not shown, each roller 17 is tiltable by a hydraulic cylinder or the like, and the workpiece W or residual material W placed on the roller 17 is transferred onto a chain conveyor of a material feeding device 7, which will be described later. It is now possible to do so.

Below the roller 17 in FIG. 9, a plurality of opposing rollers 25 (eight locations in this embodiment) are provided at appropriate positions. The opposed rollers 25 play the role of positioning and guiding when the work W placed on the rollers 17 is fed to the horizontal bandsaw machine 1. Further, the opposing roller 25 is the ninth
As shown in the figure, a kicker 27 is integrally installed as a kicker device for the remaining material, and this kicker 27 is used as a kicker device for the remaining material Ws.
It plays the role of pushing the remaining material toward Yard 9.

That is, the kicker 27 is attached to a hinge shaft 29 extending in the X-axis direction, one end of a connecting plate 31 is attached, and the tip of a piston rod 33 is connected to the other end of the connecting plate 31. rod 3
A cylinder 35 for expanding and contracting 3 is supported by the support frame 11 via a bracket 37.

With the above configuration, when the cylinder 35 is actuated to retract the piston rod 33 as shown in FIG. 9, the hinge shaft 29 rotates counterclockwise, so the kicker 27 and the opposing roller 25 are rotated. .

The material feeding device 7 includes a chain conveyor 39 as a plurality of material feeding conveyors constituting a part of the material feeding device 7, which are provided at appropriate gaps in the X-axis direction, which is the direction in which the workpiece W is fed to the horizontal bandsaw machine 1 side. It is being The chain conveyor 39 is supported by the support frames 11 and 13.

Sprockets 41.43 are provided on the upper and lower sides of the support frame 11.13 in FIG. 9, and a chino 45 is wound around the sprockets 41 and 43. Furthermore, a shaft 47 extending in the X-axis direction is attached to the axial center of the sprocket 41. A pulley 49 is fitted onto the shaft 47, and a drive motor 51 is supported on the support frame 11.

Another pulley 53 is attached to the output shaft of the drive motor 51, and a belt 55 is wound around this pulley 53 and the pulley 49.

With the above configuration, when the drive motor 51 is driven, the shaft 47 passes through the pulley 53, belt 55, and pulley 49.
is rotated. When the shaft 47 is rotated, the chain conveyor 39 attached to the chain conveyor 39 is rotated in the Y-axis direction by rotating the chain conveyor 45 wound around the sprockets 41 and 43.

The remaining material yard 9 is on an extension' (9th point) with the material feeding device 7 in the Y-axis direction perpendicular to the
A support frame 57 is provided at the knee of the support frame 13 in FIG. 9. A plurality of chain conveyors 59 are provided above the support frame 57 and the support frame 13 at appropriate intervals in the X-axis direction.

A plurality of sprockets 61.63 are provided on the upper and lower sides of the support frame 13.57 in FIG. 9, and a chino 65 is wound around the sprockets 61.63. Furthermore, a shaft 67 extending in the X-axis direction is attached to the axial center of the sprocket 63. A pulley 69 is fitted onto the shaft 67, and a drive motor 71 is supported on the support frame 57. Another pulley 73 is attached to the output shaft of this drive motor 71.
is attached, and this pulley 73 and the pulley 69
A belt 75 is wound around the belt.

With the above configuration, when the drive motor 71 is driven, the shaft 67
is rotated. When the shaft 67 is rotated, the chain conveyor 59 is rotated in the Y-axis direction by rotating the chain 65 wound around the sprockets 61 and 63.

Therefore, the cut remaining material W from the horizontal bandsaw machine 1 is returned to the material feeding device 5, and the remaining material W placed on the chain conveyor 39, which is the material feeding device 7, is kicked out by the kicker 27. It is placed on three chain conveyors, and is sent from the three chain conveyors to the chain conveyor 59 where it comes into contact with the stopper member 77 and is temporarily stored.

Furthermore, as shown in FIG. 11(A) and FIG. 11(B), as a detection means for detecting the movement of the remaining material W5 when the remaining material W5 is discharged from the material supply device 7 to the remaining material yard 9, 1st
The beam B1 of the second detector and the beam B2 of the second detector are projected upward at the outlet side of the material supply bag W7, that is, near the leftover material yard 9 side.

This detection means will be explained in more detail. Referring to FIGS. 1 to 3, as detectors, for example, light emitting side photosensors PSWIA, PSW2A are provided near the leftover material yard 9 side of the material feeding device 7, and come into contact with the discharged leftover materials WS. In order to prevent this from happening, they are recessed from the upper surfaces of the chain conveyor 39 and the chain conveyor 59, and are arranged in a row on a bracket 79 provided on the support column 13. This bracket 79 is provided with an elliptical hole 81, and is fixed with a bolt or the like so as to be adjustable in position in the Y-axis direction.

On the other hand, the light receiving side photosensors PSWIB and P5W2B are
Post 8 erected on the frame 83 of the front 2 self-feeding vise 3
5 via brackets 87. Photo sensors PSWIA and PSWIB, PSW2A and PSW2B are provided opposite each other, and as shown in an enlarged view in FIG. photo sensor P
Beams B1 and 82 of SWIA and PSW2A are projected upward with a predetermined gap therebetween.

With the above configuration, the actions of the photosensors PSWI and PSW2 will be explained with reference to FIG. 4.

FIG. 4(A) shows the movement of the remaining material W5, and FIG. 4(B)
shows the ON and OFF states of the photosensors PSWI and PSW2 as the remaining material W moves.

The conditions are that the photosensors PSWI and PSW2 are arranged in a row, the interval between the beams B1 and 82 is set shorter than the diameter of the target remaining material Ws, and the photosensors PSW
I and PSW2 are turned off when they are blocked by the remaining material W5, and are always turned on.

FIG. 4(A) shows the moving position of the remaining material WS, and when the remaining material W5 moves from right to left, it moves from symbol a to e. Further, when the remaining material Ws moves from left to right, it moves from code a' to e'. FIG. 4(B) shows changes in the ON and OFF states of the photosensors P SWI and PSW2, which are detectors, as a result of this movement.

As can be understood from Fig. 4 (B), if you know the order in which the photosensors PSWI and PSW2 turn ON and OFF when the remaining material W5 moves from right to left and from left to right, you can The direction of movement of the material Ws can be known. In other words, the photosensors PSWI are activated at the positions of signs b-1 and d'.
Since the ON and OFF states of P SW2 are reversed, it can be determined whether the remaining material W5 has moved from right to left or from left to right.

Next, as a method for detecting the remaining material WS, Fig. 5 (A) and (B)
) and FIGS. 6, 7, and 8, the explanation will be given in order.

First, as shown in FIG. 6, as a condition, for example, the remaining material W5
The diameter was set to 30 mm. This remaining material W5 with a diameter of 30 mm
The distance between the photosensors PSW1 and PSW2 when discharging the material is set to 10 mm, and the distance from the photosensor PSWI to the falling point P of the remaining material Ws is 12.5 mm. The basis for setting this value to 1.2.5 mm is the residual material WS with a diameter of 30 mm.
is expanded to a distance at which the right side surface of the remaining material WS is detected by the photosensor PSWI.

The value of 5 mm at this time is a value that takes into consideration the variation in the diameter of the remaining material W3. Further, the distance of 10 mm between the photosensors PSWI and PSW2 is the distance between the two detectors.

In the positional relationship between PSWI and PSW2 as described above, a detection method will be explained in order based on the control flowcharts of FIGS. 5(A) and 5(B).

First, the remaining material W5 is carried out from the horizontal bandsaw machine 1 by the material feeding device 5 (step Sl).

Subsequently, in step S2, the following conditions must be met. That is, the conditions for the chain conveyor 39 of the material feeding device 7 to move to the left as shown in FIG. W5 rides on the chain conveyor 39's chain 45. Then, the opposing roller 25 and the kicker 27 rotate and sink below the upper surface of the chain conveyors 45, and the lower limit of the opposing roller 25 and the kicker 27 is detected by a limit switch or the like.

Furthermore, when all the conditions are met, namely that both of the photo sensors PSWI and PSW2, which are detectors, are ON and that the remaining material yard 9 is empty, the process proceeds to the next step. In this step S2, if the above-mentioned conditions are not met, the remaining material W5
Stop the system on the spot and eliminate the problem.

Next, when the conditions of step S2 are met, the process proceeds to step S3. In step s3, the chain conveyor 39 is driven,
Move the remaining material Ws to the left. At this time, a count of the leftward movement amount of the Cheno 45 is started.

The remaining material W5 moves to the left until the detector PSW2 changes from ON to OFF (Step S4). The state at this time is
This is the state of stage G1 shown in FIG.

Subsequently, in step s5, the detector PSW2
and move left until the PSWI turns OFF.

The state at this time is the state of stage G2 shown in FIG.

Then, PSW2 is turned from OFF to ON, and the process progresses to a state where PSW1 is OFF (step S6).

The state at this time is the state of stage G3 shown in FIG.

Further, the process proceeds to step s7. In this step S7, PSW2 is turned on and PSWI is turned on. Move left from FF to ON state. The state at this time is the state of stage G4 shown in FIG.
s will be discharged.

However, if the conditions in step S6 are not met, the process advances to step S8. That is, it is checked whether the leftward movement distance from the time when PSW2 was turned off from the first ON time has exceeded Ll. Note that Ll is the distance of 12.5
mm is the distance between the falling point P and PSWl, D is the remaining material W
The diameter of S, L2, is a parameter and is, for example, 80 mm.

If the remaining material W exceeds this distance, it is an abnormality and the machine will stop completely.

Also, if the conditions are not met in step S7,
Proceed to step S9. That is, it is checked whether the leftward movement distance from when 28w2 was turned off from the first ON to OFF has exceeded Ll, and if the remaining material W5 exceeds the distance L, it is abnormal and the operation is completely stopped.

Next, the process moves to the control flowchart shown in FIG. 5(B).

At step SIO, the chain conveyor 9 of the material supply device 7 is stopped from moving to the left. However, the detector PSWI is O
When the state changes from FF to ON, the remaining material WS is assumed to have been discharged and the chain conveyor 39 stops moving to the left, but after that, the remaining material W becomes the remaining material WS that has already been discharged to the remaining material yard 9
If the ball hits the ball and is bounced back, the process moves to step Sll.

In this step S11, PSW2 is ON and PSWI
is OFF, PSW2 is OFF and PSWI is OFF, PSW2 is OFF and PSWI is OFF.
When the result is N, check whether any of the states has occurred.

Then, the process moves to step S12. In step S12,
Check whether PSW2 is turned on and PSWl is also turned on. This step S12 is the remaining material Ws
This is a case where the remaining material WS is bounced back and rolls to the right beyond the two detectors PSW1 and PSW2. When this condition occurs, it is abnormal and the system will stop completely. If it is not in this state, it is normal and the process advances to the next step 813.

At step 31B, the chain conveyor 39 starts moving the chain 45 to the right. At this time, start counting the amount of rightward movement.

Subsequently, in step S14, pswl is turned from ON to OFF.
Check whether it has become F or is in the OFF state. This check is a control performed when the remaining material W5 that should have been discharged is returned. If this state is YES, the remaining material W5 is full in the remaining material yard 9 and the remaining material W5 cannot be discharged, so the system must be completely stopped and the remaining material W5 accumulated in the remaining material yard 9 must be carried out. No. If No in step S14, the process moves to step S15.

In step S15, the chain conveyor 39's chain conveyor 39
Checks whether the amount of movement since the start of rightward movement has reached L3. The amount of movement, as shown in FIG. 8, is the amount of movement counted by the chain conveyor 39 from when it starts moving left to when it stops moving left. Then, when the movement it L s is reached in step S15, the process proceeds to the next step S16. In addition, in step S15, the amount of movement is determined,
If this is not the case, the process returns to step 313 and the chain conveyor 39's chain 45 is further moved to the right.

In step S16, the opposing roller 25 is rotated until it is in a vertical state, and in step S17, it is detected by a limit switch or the like whether or not the opposing roller 25 is completely in a vertical state.

If it is detected in step 517 that the opposing roller 25 has completely returned to the vertical state, the process proceeds to step S18.

In step 818, a series of detection controls are completed, and in order to discharge the remaining material WS carried out by the material feeding device 7 again, the chain conveyor 39's chain 45 starts to move leftward, and the remaining material WS is transferred to the remaining material yard. Discharge to 9.

Through the above-described series of controls, the provision of the two pairs of detectors, the photosensors PSWI and PSW2, ensure that the remaining material W5 is discharged to the remaining material yard 9, or that the remaining material W5 is discharged from the remaining material yard 9 to the remaining material WS. It is possible to reliably detect whether the remaining material Ws has been bounced back and has overflowed into the remaining material yard 9 and there is no longer space to discharge the remaining material W5.

Note that the present invention is not limited to the embodiments described above, and can be implemented in other embodiments by making appropriate changes.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, a plurality of detectors are provided near the remaining material yard side of the material feeding device, and the detection positions of the plurality of detectors are adjusted. The distance between them is set to be shorter than the diameter of the remaining material, and the moving direction of the remaining material is detected by turning on and off the detector, and it is also detected whether the remaining material yard is full of the remaining material.

As a processing system, a series of workpieces or residual materials such as material supply, product transport, and residual material discharge can be reliably performed, and reliability and reliability can be improved.

[Brief explanation of drawings]

FIG. 1 shows the main part of this invention, and I-
2 is a right side view of FIG. 1, FIG. 3 is an enlarged view of the part shown by the ■ arrow in FIG. 5(A) and 5(B) are control flowcharts of the method for detecting the movement position of residual materials, FIG. 6 is an explanatory diagram of the operation, and FIG. Fig. 8 is an explanatory diagram of the amount of movement of the remaining material, Fig. 9 is a plan view of a detection device in a cutting machine according to an embodiment of the present invention, and Fig. 10 is a cross-sectional view taken along the line X-X in Fig. 9. , FIG. 11 is a sectional view taken along the line XI-XI in FIG. , is a sectional view showing the discharge state. 1...Horizontal band saw machine 5...Material feeding device 7...Material feeding device 9...Remaining material yard PSWI, PSW2
···Detector

Claims (2)

[Claims] (1) A material feeding device that feeds the workpiece to the cutting machine, a residual material yard provided on one side of this material feeding device, and a material yard for feeding the workpiece to the material feeding device and carrying it out by the material feeding device. In a cutting machine equipped with a material feeding device for discharging leftover material to the remaining material yard, a plurality of detectors provided near the remaining material yard side of the material feeding device at intervals shorter than the diameter of the remaining material; A method for detecting residual materials in a cutting machine, comprising detecting the moving direction of the residual materials and detecting whether the residual materials yard is filled with residual materials. (2) A material feeding device that feeds the workpiece to the cutting machine, a residual material yard provided on one side of this material feeding device, and a material feeding device that supplies the workpiece to the material feeding device and carries out the workpiece by the material feeding device. a material feeding device for discharging the remaining material to the remaining material yard, a plurality of detectors are arranged in a row near the remaining material yard side of the material feeding device, and the distance between the detection positions of the detectors is set to A residual material detection device for a cutting machine, characterized in that the device is set to be shorter than the diameter.