JP4392459B1 - Circular saw cutting machine - Google Patents

Abstract

[PROBLEMS] To shorten cycle time in continuous sizing cutting.
Air nozzles 21 and 21 for discharging compressed air from the direction in which a workpiece W is fed are provided in the vicinity of the cutting edge of a circular saw blade 9 mounted on a circular saw motor 11, and after the completion of cutting, compressed air is supplied from the air nozzles 21 and 21. The circular saw motor 11 is started to move backward after being discharged, and when the circular saw motor 11 returns to the standby position, control is performed to stop the discharge of compressed air. The air nozzles 21 and 21 are installed at the tip of an air passage built in a saw blade cover that covers the circular saw blade, and a universal hose 27 that introduces compressed air from the compressed air source 2 is connected to the air passage 25. The control device 40 outputs a command for performing opening / closing control of the air valve 29 installed at the inlet of the air passage 25.
[Selection] Figure 1

Description

  The present invention relates to a circular saw cutting machine having a mechanism for preventing a saw tooth from coming into contact with a workpiece when a circular saw that has been cut by moving it forward to a cutting position is moved back to the original position. It is.

  Conventionally, when a circular saw is reciprocated to continuously cut a rod-shaped workpiece into a predetermined length, as shown in FIG. 9 (A), the circular saw is configured to move along a path that draws a loop. Has proposed a circular saw cutting machine having a mechanism for avoiding contact with a workpiece when the circular saw is returned to its original position after cutting (Patent Document 1).

  In addition, as shown in FIG. 9B, there is also a proposal of a circular saw cutting machine that prevents the contact between the work and the saw blade by returning the movable table on which the work is placed in the separation direction when the circular saw is returned. (Patent Document 2).

Further, as shown in FIG. 9C (d), the tip position of the workpiece is indicated by a dotted line, and control is performed to avoid contact between the circular saw and the workpiece by raising the circular saw after returning the workpiece slightly backward. There is also a proposal of a circular saw cutter (Patent Document 3).
Japanese Utility Model Publication No. 6-9818 (FIGS. 4 and 5) JP 2000-176732 A (FIGS. 5 and 6) JP 2001-96424 A (FIG. 10)

  The circular saw cutting machine of Patent Document 1 has a problem that the mechanism is complicated, and the moving path of the circular saw becomes long, and the cycle time in continuous sizing cutting becomes long.

  The circular saw cutting machine of Patent Document 2 also requires a movable table, and the mechanism is complicated. In addition, when performing continuous sizing cutting, a “returning operation of the movable table” is required, resulting in an increase in cycle time. .

  Although the circular saw cutting machine of Patent Document 3 has a relatively simple structure, there is a problem that a retraction operation for retracting the workpiece when returning to the circular saw is required, and the cycle time in continuous sizing cutting becomes long.

  Accordingly, the present invention does not complicate the path of the reciprocating motion of the circular saw, eliminates the work retracting operation (retracting operation) when the circular saw returns, and can reduce the cycle time in continuous sizing cutting. The purpose was to provide a machine.

  In order to achieve the above object, a circular saw cutting machine according to the present invention includes a circular saw motor that rotationally drives a circular saw blade, a motor moving device that moves the circular saw motor between a standby position and a cutting position, The apparatus includes a conveying device that feeds the workpiece to the cutting position, and a fixed vice device that fixes the workpiece at the cutting position, and further includes the following configuration.

  (1) An air nozzle that discharges compressed air from the feeding direction of the workpiece is provided near the cutting edge of a circular saw blade mounted on the circular saw motor.

  (2) When the motor moving device retracts the circular saw motor from the cutting position to the standby position, after the compressed air is discharged from the air nozzle, the backward operation of the circular saw motor is started, and at least the circular saw is started. A saw blade return operation control device that performs control to continuously discharge compressed air from the air nozzle until the cutting edge of the blade has finished moving toward the standby position from the cut surface of the workpiece;

  According to the circular saw cutting machine of the present invention, by providing the configurations of (1) and (2), the compressed air is discharged from the air nozzle when the circular saw motor is returned to the standby position after the cutting is completed. Is done. Since this discharge direction is the workpiece feeding direction, and the discharge position is in the vicinity of the cutting edge of the circular saw blade, the circular saw blade is slightly curved so that the cutting edge faces away from the remaining workpiece. Become. Therefore, when the circular saw motor is returned to the standby position, the cutting edge of the circular saw blade does not contact the cut surface of the workpiece.

  The air nozzle can be attached to the table side of the cutting machine so that the compressed air can be discharged as described above in the vicinity of the cutting position.

  (3) The air nozzle is configured as a member that moves together with the circular saw motor.

  By adopting such a configuration, the discharge position of the compressed air to the circular saw blade by the air nozzle does not change during the return operation of the circular saw motor, so continuous sizing is performed on materials with different workpiece diameters. However, the state in which the circular saw blade does not contact the workpiece cutting surface can be more reliably realized.

  In this case, the following configuration can also be provided.

  (4) The air nozzle is installed at the tip of an air passage built in a saw blade cover that covers the circular saw blade, and a universal hose that introduces compressed air from a compressed air source is connected to the air passage. thing.

  (5) The saw blade return operation control device is configured as a device that outputs a command for performing opening / closing control of a valve installed between the compressed air source and the air nozzle.

  By connecting to the compressed air source with a universal hose, it is possible to flexibly adapt to the factory layout, and by incorporating an air passage in the saw blade cover, the discharge position of the compressed air by the air nozzle and the cutting edge of the circular saw blade It is possible to accurately adjust the positional relationship between

  These circular saw cutters of the present invention can further have the following configuration.

  (6) The saw blade return operation control device is configured as a device that executes control to continuously discharge compressed air from the air nozzle until the circular saw motor has finished moving to the standby position.

  After discharging compressed air, the circular saw motor starts to return to the standby position and continues to discharge compressed air until the return operation is completed, simplifying the control and bringing the circular saw blade into contact with the workpiece. It is possible to reliably exhibit the effect of avoiding the above.

  According to the present invention, since the circular saw blade can be returned to the standby position in a state in which the blade edge is curved in the direction of escaping from the workpiece, the circular saw motor can cope with the structure of linear movement, and the workpiece retraction operation can be performed. It is unnecessary and the cycle time in continuous sizing cutting can be shortened.

It is a block diagram of the cutting device of Example 1. The principal part of the cutting device of Example 1 is shown, (A) is a right view, (B) is a horizontal sectional view. It is a block diagram of the control system of the cutting device of Example 1. It is a flowchart of the work procedure at the time of using the cutting device of Example 1. FIG. It is a flowchart which shows the content of the control processing which the cutting device of Example 1 performs. It is a flowchart which shows the content of the control processing which the cutting device of Example 1 performs. It is a flowchart which shows the content of the control processing which the cutting device of Example 1 performs. It is explanatory drawing which shows the effect | action and effect by the air discharge at the time of the circular saw return operation | movement in Example 1. FIG. It is explanatory drawing of a prior art.

  Hereinafter, a circular saw motor that rotationally drives the circular saw blade, a motor moving device that moves the circular saw motor between a standby position and a cutting position, a transport device that feeds the workpiece to the cutting position, and a workpiece at the cutting position An embodiment including a fixed vise apparatus for fixing the above and further including all the configurations of (1) to (6) described above will be described.

  Embodiment 1 of the present invention will be specifically described below with reference to the drawings.

  As shown in FIG. 1, the cutting device 1 according to the first embodiment includes an automatic circular saw 3, a roller conveyor 5 for feeding the workpiece W to the automatic circular saw 3, and a stock yard 7 for the workpiece W. I have. The automatic circular saw machine 3 includes a circular saw motor 11 on which the circular saw blade 9 is mounted, a fixed vise 13 for clamping the workpiece W in the vicinity of the cutting position by the circular saw blade 9, A transfer vice device 15 that can move between a near advance end and a retreat end on the roller conveyor 5 side, a pinch roller 17 installed in the vicinity of a work feed port from the roller conveyor 5 to the automatic circular saw 3, A guide 19 for reciprocating the saw motor 11 between the cutting position and the standby position is provided.

  The fixed vise 13 is for performing a clamping / unclamping operation by a clamping cylinder.

  The conveying vise device 15 is for intermittently feeding the workpiece W by performing a clamping / unclamping operation by a clamping cylinder and a forward / backward operation by a servo motor and a screw feeding mechanism.

  The pinch roller 17 is composed of a moving roller that performs a clamping / unclamping operation by a clamping cylinder, and a fixed roller that is driven by a servo motor. The pinch roller 17 performs an operation of feeding the workpiece W when cutting is first started. Do.

  As shown in FIG. 2, the automatic circular saw machine 3 of the cutting apparatus 1 according to the first embodiment includes two air nozzles 21 and 21 that discharge compressed air to the surface of the circular saw blade 9 on the workpiece feeding side. Yes. The air nozzles 21 and 21 are built in a saw blade cover 23 that is detachably attached to the circular saw motor 11. Further, the positions of the air nozzles 21 and 21 are adjusted so that the discharge position by them is close to the outer periphery of the circular saw blade 9.

  An air passage 25 for introducing compressed air into the air nozzles 21 and 21 is built in the saw blade cover 23. The air passage 25 and the compressed air source 2 in the factory are connected by a bendable universal hose 27. Further, an air valve 29 that is electromagnetically opened and closed is attached to the inlet portion of the air passage 25.

  The cutting device 1 according to the first embodiment has a configuration as shown in FIG. 3 as a control system. The control device 40 is configured to receive signals from the photoelectric sensor 25, the linear sensor 37, and the operation panel 50. The photoelectric sensor 25 is provided in the transport vice apparatus 15 and detects that the tip of the workpiece W has reached a predetermined position near the front end of the jaw. The linear sensor 37 is for detecting the stroke amount of the clamping cylinder of the pinch roller 17.

  The control device 40 includes a clamping cylinder 35 for the pinch roller 17 and a servo motor 61 for the driving roller, a clamping cylinder 27 for the conveying vice device 15, a lifting cylinder 62 and a longitudinal servo motor 63, and a clamping cylinder 65 for the fixed vise 13. The control signal is output to the circular saw motor 11 and the servo motor 67 for moving the circular saw motor along the guide, and the air valve 29 for supplying compressed air to the air nozzles 21 and 21. An encoder signal is input from each servo motor 61, 63, 67.

  The operation panel 50 is used to input various setting conditions. In the first embodiment, in particular, the first mode in which the workpiece W is cut at the front end and then the fixed size is cut, and the end is not cut off. One feature is that a mode setting switch 51 for switching and setting the second mode for performing fixed-size cutting is provided. In addition, an input keyboard 53 for inputting various information is also provided.

  The control device 40 includes a control circuit 41 and a storage device 43. The control circuit 41 is configured by a computer, and the storage device 43 is configured by a hard disk or the like. The computer constituting the control circuit 41 includes a control program for controlling the sizing operation of the automatic circular saw machine 3, an arithmetic processing program for calculating a sizing feed amount based on information input from the input keyboard 53, and the like. Process based on. The program for calculating the fixed feed amount calculates the fixed feed amount A from the workpiece information such as the type and diameter of the workpiece W and blank information such as the mass of the material necessary as a blank and stores it in the storage device 43. Perform arithmetic processing.

  In the storage device 43, in addition to the above-described various computer programs and fixed-size feed amount A, the distance B between the forward end position of the conveying vice device 15 and the circular saw blade 9 in the automatic circular saw machine 1, “with end cut” Also stored are numerical information necessary for control processing such as a reference amount α for cutting off and a diameter difference allowance ΔD for outputting a diameter mismatch warning.

  Next, the case where the blank of the constant mass for forging is manufactured from the workpiece | work W of a round bar steel material using the cutting device 1 of embodiment is demonstrated. First, the procedure of the work performed by the worker will be described with reference to the flowchart of FIG. Prior to starting the machining, the steel type and diameter of the workpiece W to be input to the stock yard 7 are input (S1). Next, a blank mass condition to be manufactured is input (S2). Then, the mode setting switch 51 is operated to set “with edge cut” or “without edge cut” (S3). When the machining conditions are thus input, the workpiece W stocked in the stock yard 7 is put into the roller conveyor 5 and set to a position where it can be clamped by the pinch rollers 17 (S4). Then, a machining start is commanded (S5).

  When the operator gives an instruction to start machining (S5), the computer starts a cutting program and starts a control process as shown in FIGS. First, a clamping operation is commanded to the clamping cylinder 35 of the pinch roller 17 (S21). Based on the stroke amount detection signal input from the linear sensor 37, the workpiece diameter is calculated (S22). It is determined whether or not the difference between the diameter thus calculated and the diameter input by the operator is within a diameter difference allowable amount ΔD (S23). When the diameter difference allowable amount ΔD is exceeded (S23: NO), an alarm is generated (S24).

  When the difference between the actually measured diameter and the input diameter satisfies the diameter difference allowable amount ΔD (S23: YES), the constant feed amount A is calculated based on the actually measured diameter and the blank mass condition (S25). ) And stored in the storage device 43 (S26). Thereby, the fixed feed amount A is set based on the actual measurement value.

  Next, a feed operation is commanded to the drive servo motor 61 of the pinch roller 17 (S31). And it waits for the workpiece | work detection signal from the photoelectric sensor 25 to be input (S32). When the workpiece detection signal is input (S32: YES), the servo motor 61 for driving the pinch roller 17 is instructed to stop (S33).

  Subsequently, it is determined whether or not the mode of whether or not to cut off is set (S41). When the result of this determination is “with end cut”, the servo motor 63 of the conveying vice apparatus 15 is moved backward by B (distance between the forward end position and the circular saw blade 9) + α (end cut reference amount). A command (retract command) is output (S51). Then, when the completion of the backward movement of B + α is detected (S52: YES), a clamping operation is commanded to the clapping cylinder 27 of the transport vice apparatus 15 (S53). When the clamp completion signal is input (S54: YES), the lift is instructed to the lift cylinder 62 of the transport vice apparatus 15 (S55), and the servo motor 63 is instructed to move to the forward end. (S56). When the completion of the forward end movement is detected (S57: YES), a return command is issued to the lift cylinder 62 of the transport vice device 15 (S57), and a clamp command is issued to the clamp cylinder 65 of the fixed vise 13. Is output (S58). Then, unclamping and retracting is instructed to the conveying vice device 15 (S59), and clamping is instructed when the fixed position is returned (S60). By the series of commands so far, the workpiece is set in a state of protruding from the cutting position by the length of the end cutting by the conveying vise device 15 and the fixed vise 13. Moreover, it becomes a state which can start fixed-size cutting immediately after end cutting. In other words, the “fixed position” here is a position that is retracted by a fixed feed amount A from the forward end. Moreover, the workpiece | work is set, without colliding with the table of a cutting position by conveying in a lift state.

  Subsequently, a drive command is output to the circular saw motor 11 and an end cutting operation is commanded to the servo motor 67 for moving the circular saw (S61). When a cutting completion signal is input from the servomotor 67 for moving the circular saw (S62: YES), the fixed vise 13 is commanded to unclamp (S63), the air valve 29 is opened, and the compressed air from the nozzles 21 and 21 is sent. A command to start the discharge is output (S64). Next, a return command to the standby position is output to the servomotor 67 for moving the circular saw (S65). When the circular saw returns to the standby position (S66: YES), a command to close the air valve 29 and stop the discharge of compressed air is output (S66).

  By the discharge of the compressed air, the circular saw blade 9 is slightly curved in a direction away from the workpiece W as shown in FIG. 8, and a gap is formed between the cut surface of the workpiece W. As a result, even if the workpiece W is not retracted during the circular saw returning operation, the circular saw blade 9 can be smoothly returned without contacting the workpiece W.

  Hereinafter, “(1) Work lift operation” → “(2) Transport vice device advance operation” → “(3) Work lowering operation” → “(4) Fixed vise clamp operation” → “(5) Transport vise device unclamp” -"Retract Operation"-> "(6) Transport Vise Device Clamp Operation"-> "(7) Circular Saw Motor Cutting Operation"-> "(8) Fixed Vise Unclamp Operation"-> "(9) Compressed Air Discharge Operation"-> "( 10) Circular saw motor return operation ”→“ (11) Compressed air discharge stop operation ”→“ (1) Work lift operation ”→... The “fixed size cutting operation” to be executed is performed (S80).

  On the other hand, when the setting mode is “no end cut”, instead of the control processing of S51 to S65, as shown in FIG. 7, the servo motor 63 of the transport vice apparatus 15 is instructed to advance at low speed (S71). ), When the photoelectric sensor 25 detects the tip of the workpiece, the stop is instructed (S72, S73), the reverse operation of A + B is instructed (S74), and the clamping operation by the transport vice device 15 in the reverse position is instructed (S75). , S76), and thereafter, a fixed-size cutting operation (S80) is executed.

  As described above, according to the cutting device 1 of the first embodiment, it is possible to avoid contact between the workpiece and the saw blade when performing the circular saw return operation without retracting the workpiece W. Therefore, the cycle time for performing continuous sizing can be shortened. In addition, since the cut blank is discharged | emitted from the cutting position via a chute | shoot etc. at the time of completion | finish of a cutting | disconnection, a blade edge does not contact also these products.

  As mentioned above, although one Example of this invention was described, it cannot be overemphasized that various deformation | transformation implementation is possible for this invention within the range which is not restricted to this Example and does not deviate from the summary.

  The present invention can be applied to an apparatus that continuously cuts a workpiece.

DESCRIPTION OF SYMBOLS 1 ... Cutting device 2 ... Compressed air source 3 ... Automatic circular saw machine 5 ... Roller conveyor 7 ... Stock yard 9 ... Circular saw blade 11 ... Circular saw motor 13 ... -Fixed vice 15 ... Conveying vice device 17 ... Pinch roller 21 ... Air nozzle 23 ... Saw blade cover 25 ... Air passage 27 ... Universal hose 29 ... Air valve 40 ... Control Equipment 50 ... Operation panel 61 ... Servo motor for driving roller 63 ... Servo motor for forward / backward movement 65 ... Cylinder for clamping of fixed vise 67 ... Servo motor for moving circular saw W ... Workpiece

Claims (4)

A circular saw motor that rotationally drives a circular saw blade, a motor moving device that moves the circular saw motor between a standby position and a cutting position, a transport device that feeds the workpiece to the cutting position, and a workpiece fixed at the cutting position A circular saw cutting machine comprising: a fixed vice device that further includes:
(1) An air nozzle that discharges compressed air from the feeding direction of the workpiece is provided near the cutting edge of a circular saw blade mounted on the circular saw motor.
(2) When the motor moving device retracts the circular saw motor from the cutting position to the standby position, the compressed air is discharged from the air nozzle and then the backward operation of the circular saw motor is started, and at least the circular saw is started. A saw blade return operation control device that performs control to continuously discharge compressed air from the air nozzle until the cutting edge of the blade has finished moving toward the standby position from the cut surface of the workpiece; The circular saw cutter according to claim 1, further comprising the following configuration.
(3) The air nozzle is configured as a member that moves together with the circular saw motor. The circular saw cutter according to claim 2, further comprising the following configuration.
(4) The air nozzle is installed at the tip of an air passage built in a saw blade cover that covers the circular saw blade, and a universal hose that introduces compressed air from a compressed air source is connected to the air passage. thing.
(5) The saw blade return operation control device is configured as a device that outputs a command for performing opening / closing control of a valve installed between the compressed air source and the air nozzle. The circular saw cutter according to any one of claims 1 to 3, further comprising the following configuration.
(6) The saw blade return operation control device is configured as a device that executes control to continuously discharge compressed air from the air nozzle until the circular saw motor has finished moving to the standby position.