JPH0639923Y2 - Control device for work material transfer machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a work material transfer machine which feeds a work material such as a plate material or a square material placed on a table in a fixed direction in a constant size.

[0002]

2. Description of the Related Art As a conventional technique, there is one described in Japanese Patent Application No. 4-23066 filed by the present applicant. 1 and 2, 1 is a table of a processing machine (not shown), and A is a processing material W placed on the table 1.
Is a transfer machine for transferring. This transfer machine A supports a case 2 on a column (not shown) that is vertically fixed to the table 1,
The transfer unit 3 is attached to the lower side of the case 2. Transfer section 3
2, as shown in FIG. 2, two support shafts 4 (one is omitted in FIG. 2) are laterally projectingly fixed to the front and rear portions (left and right in FIG. 2) of the case 2, and fixed to each support shaft 4. The pair of arms 5 are expanded in the front-rear direction and rotatably fitted and inserted, and the arms 5 are pressed and urged downward by an elastic body 6 made of a coil spring. A rotating shaft 7 is rotatably supported at the rotating end of each arm 5 about an axis parallel to the supporting shaft 4, and a roller 8 is fixed to the right end of the rotating shaft 7 in FIG. The outer periphery of each of these rollers 8 is formed of a rubber material having a high friction coefficient.

A feed motor 9 is attached to the upper part of the case 2, and the rotary shafts 7 are driven to rotate in synchronization with the feed motor 9 via a transmission mechanism (not shown) such as a chain and a sprocket. Further, as shown in FIG.
A support plate 11 is attached to the right side of the bracket via a bracket 10, and a pair of upper and lower leaf springs 12 and 13 are projected and locked to the support plate 11 to the right. The leaf springs 12 and 13 have their surfaces parallel to the surface of the table 1 and have the same rightward protrusion length. These leaf springs 12, 13
The projecting end (right end) of is integrally connected by the connecting plate 14,
The suspension plate 15 is suspended and fixed to the connection plate 14.

A rotary feed amount detector, that is, an encoder 16 is locked to the lower portion of the suspension plate 15. The encoder 16 projects its rotary shaft 17 in parallel with the rotary shaft of the roller 8 in the direction of the roller 8 and engages with the suspension plate 15 at the protruding end (left end) of the rotary shaft 17. The disc-shaped probe 18 is fixed. Further, as shown in FIG. 1, an arm 19 is projected and fixed to the right in the vertical middle portion of the support plate 11 described above, and two adjusting screws 20 and 21 are separated from each other in the arm 19 in the left and right directions. Screw it in. this house,
The adjusting screw 20 on the left portion is brought into contact with the lower leaf spring 13 as necessary to adjust the initial spring force of the spring 13 upward. The right adjusting screw 21 is brought into contact with the upper leaf spring 12 to adjust the initial height of the probe 18.

Reference numeral 22 denotes a control unit which decelerates the rotation speed of the feed motor 9 when the length measurement signal calculated based on the pulse signal output in proportion to the rotation amount of the encoder 16 approaches a set value. When the long signal reaches the set value, the feed motor 9 is stopped, and thereby the work material W on the table 1 is fed to the work machine in the left direction in FIG.

[0006]

In such a transfer machine A, an accurate transfer can be achieved due to a short length of the work material W, a slip between the roller 8 and the work material W, or a failure of parts or devices. In order to prevent obstruction, it is considered to provide various safety devices. It is not preferable to equip the transfer device A with a new sensor or the like because the cost increases. Therefore, the signal of the encoder 16 which is always in contact with the workpiece W and outputs the length measurement signal is used during the transfer of the workpiece W, and when there is no output signal of the encoder 16 during the start of the feed motor 9, Is detected as an abnormal feed, in this case, for example, after the start-up, until the workpiece W is supplied, that is, until the tip of the workpiece W contacts the probe 18 of the encoder 16. Alternatively, the measuring element 18 of the encoder 16 during the discharge of the processed material W after the processing is completed.
When the work material W comes off the end of the work material W, it is immediately detected as a feed error, and smooth supply and discharge cannot be performed. It is an object of the present invention to obtain a new control device for a work material transfer machine, which solves the above drawbacks.

[0007]

The present invention is configured as follows to achieve the above object. That is, a feed motor driven by a drive signal from a motor drive unit, and a transfer unit that pushes a work material placed on a table by a rotating body rotated by the feed motor to transfer the work material in a certain direction. A feed amount detection sensor for detecting the feed amount of the processed material, a feed amount setting unit for setting the feed amount of the processed material, a feed amount set in the feed amount setting unit, and a length measurement signal from the feed amount detection sensor. In a control device of a work material transfer machine having a feed control unit that controls the feed motor drive unit so that a predetermined feed amount is obtained based on A feed abnormality detection unit that detects a feed abnormality depending on the presence or absence, and a start abnormality detection cut-off that cuts off the detection of the feed abnormality detection unit from the start until the feed amount detection sensor outputs a detection signal. Is obtained by the configuration in which the parts. Also,
A feed error detection unit that detects a feed error based on the presence or absence of a detection signal from the feed amount detection sensor during the transfer of the work material, and a discharge for cutting off the detection of the feed error detection unit for a predetermined time during the discharge of the work material An abnormality detection cutoff section is provided.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, FIG. 3 is a block diagram showing a circuit configuration of a control device applied to the transfer machine A of FIGS. Reference numeral 23 is a setting switch for setting processing conditions and the like, an operation panel panel on which operation switches and various display elements are arranged, 24 is a memory for storing a control program, various data, etc. A central processing unit (CPU) of a microcomputer that outputs various performance and control signals according to a control program stored in 24, 26 inputs a pulse signal from the encoder 16 to the CPU 25, and a control signal from the CPU 25 to an external device ( For example, the input / output unit for outputting to the feed motor 9 and the processing machine, and 27 is a motor drive unit for driving the feed motor 9.

FIG. 4 is a front view of the operation panel panel 23. 28 is a power switch, 29 is an emergency feed stop switch, 30 is an interlocking output switch for selecting whether to output a processing command signal to the processing machine, 31 is various parameters (origin dimension value, discharge timer value of the workpiece W) , Manual feed speed value, etc.), discharge mode, machining mode (one shot, single process, all processes), machining course (programmed machining pitch), etc., in the memory 24 before starting machining. A selection switch section, 32 is a ten-key switch, 33 is a quantity display section for displaying the processing quantity (remaining quantity), 3
4 is a course and process display unit for displaying the selected machining course value, 35 is a feed amount (length) display unit, 36 is a motor speed display unit, 37 is a machining frequency display unit, and 38 is a selection unit. A display unit that displays the selected processing mode and a display unit 39 that displays the selected discharge mode. Reference numeral 40 is a start switch for starting processing.

Next, FIG. 5 shows the CP stored in the memory 24.
It is a flowchart which shows operation | movement of the control program of U25. The operator has a feed pitch (L), the number of machining times (N),
After setting the processing conditions such as the processing course and the discharge mode such as the forward direction (A), the reverse direction (B), or the stop (C) in the memory 24 by the mode selection switch unit 31 or the like,
When the start switch 40 is turned on, the control program starts (S1), and the feed motor 9 rotates normally (S2).
When the feed motor 9 rotates in the normal direction, the roller 8 transfers the processed material W in the forward direction (leftward in FIG. 2). However, until the workpiece W is transferred to the position of the encoder 16 and the probe 18 of the encoder 16 contacts the upper surface of the workpiece W and outputs a length measurement signal, the measurement start is started (S3). The detection of the feeding abnormality at the time is cut (S4). During this time, when the worker supplies the processed material W to the right end portion of the transfer unit 3 in FIG. 2, the roller 8 transfers the processed material W in the forward direction, and the probe 18 of the encoder 16 eventually comes to the upper surface of the processed material W. When they come into contact with each other and rotate, the state of measurement start (S6) is reached.

The CPU 25 compares the feed pitch (L) stored in the memory with the actually measured feed amount (Li) calculated based on the length measurement signal from the encoder 16 to obtain (L = L
When i) is reached, a sizing signal is output (S7) and the feed motor 9 is stopped (S10). The presence or absence of the length measurement signal from the encoder 16 is determined until the sizing signal is output (S8)
Then, when the length measurement signal is not output during this period, a feed abnormality alarm is issued (S9) and the feed motor is stopped (S23).
To do. When the sizing signal is output, the CPU 25 outputs a processing command signal to the processing machine (not shown) from the input / output unit 26 (S11). The processing machine starts the processing when the processing command signal is input from the input / output unit 26, and returns the processing completion signal to the input / output unit 26 when the processing is completed.

When the CPU 25 determines that the processing completion signal is output from the processing machine (S12), the CPU 25 subtracts the set number of times of processing (N) (N = N-1) and (S1).
3) Then, it is determined whether the subtracted number of machining operations (N) is (N = 0) (S14). When the number of times of machining (N) is not (N = 0), the feed motor 9 is used to machine the next machining pitch.
Is rotated in the normal direction (S15), and the process again jumps to the measurement start (S6).

On the other hand, when the number of times of processing (N) is (N = 0), that is, when the processing of the number of times of processing (N) set in advance is completed, the CPU 25 sets the discharge mode set for the motor drive unit 27. Perform corresponding control. That is, when the set discharge mode is the forward direction (A) (S16), the feed motor 9 is normally rotated (S17), and when the set discharge mode is the reverse direction (B) (S18), the feed is performed. The motor 9 is reversed (S19). Further, when the set discharge mode is stopped (C), the feed motor 9 is stopped (S23).

When the feed motor 9 rotates in the normal direction (S17), the roller 8 of the transfer section 3 automatically discharges the work material W (mill end material) in the forward direction (left in FIG. 2). Further, when the feed motor 9 reversely rotates (S19), the roller 8 of the transfer unit 3 automatically discharges the processed material W (mill end material) in the reverse direction (right side in FIG. 2). On the other hand, when the discharge mode is stopped (C), the feed motor 9
Is stopped (S23), the roller 8 of the transfer unit 3 stops while holding the processed material W (mill end material) between the tables 1. As described above, the worker can automatically discharge the processed material W (mill end material) after processing is completed in a predetermined direction only by setting the discharge mode in the mode setting unit in advance.

The CPU 25 detects whether or not the work material W (mill end material) that is automatically ejected in the forward and reverse directions has separated from the probe 18 of the encoder 16 based on the presence or absence of a length measurement signal from the encoder 16 (S20). Then, the predetermined time (for example, 1 to 9 seconds) preset in the control program is counted by the program timer (discharge delay timer) (S21).
Then, the feed error detection is cut off during the delay time (S22).
Let When the discharge delay timer times up (S21), the CPU 25 stops the feed motor 9 (S23) and ends the control program (S24).

FIG. 6 is a block diagram showing the functional arrangement of the above embodiment. Reference numeral 41 denotes a mode setting section for setting the discharge mode on the operation panel panel 23, and 42 denotes the discharge mode from the workpiece transfer section in the forward and reverse directions as shown in (S14 to S17 and S21) of the flowchart of FIG. A mode determining unit for selecting the direction or stop, 43 is a feed amount setting unit for setting various feed amounts (L) in the machining course on the operation panel panel 23, and 44 is the feed amount set in the feed amount setting unit 30. A feed control unit that controls the motor drive unit 27 so that a predetermined feed amount is obtained by comparing the amount (L) with a length measurement signal calculated based on an output signal from the encoder 16 that is a feed amount detection sensor. . Reference numeral 45 is a feed abnormality detection unit that detects a feed abnormality based on the presence or absence of a detection signal from the feed amount detection sensor during the transfer of the work material, and 46 is a material (work material W) at the time of start.
Is confirmed, that is, until the encoder 16 outputs a detection signal, the feed abnormality detection cut-off unit for start cuts off the detection of the feed abnormality detection unit 45, and 47 is the feed abnormality detection unit for a predetermined time during discharging. This is a discharge feed abnormality detection cutoff unit that cuts off the detection of 45.

[0017]

EFFECTS OF THE INVENTION As is clear from the above description, the present invention can accurately detect a feed error during transfer by using the feed amount detection sensor of the processed material, and the control device is simple and inexpensive. Has the effect.

[Brief description of drawings]

FIG. 1 is a sectional front view of a main part of a transfer machine.

FIG. 2 is a side view of a transfer machine.

FIG. 3 is a block diagram showing a circuit configuration of a control device according to the present invention.

FIG. 4 is a front view of an operation panel panel according to the present invention.

FIG. 5 is a flowchart showing the operation of a control program according to the present invention.

FIG. 6 is a block diagram showing a functional configuration according to the present invention.

[Explanation of symbols]

 1 table A transfer device 2 case 3 transfer part 4 support shaft 5 arm 6 elastic body 7 rotating shaft 8 roller 9 feed motor 16 encoder 17 rotating shaft 18 measuring element 23 operation panel panel 24 memory 25 microcomputer (CPU) 26 input / output unit 27 Motor Drive Section 40 Start Switch 41 Mode Setting Section 42 Mode Judgment Section 43 Feed Rate Setting Section 44 Feed Control Section 45 Feed Abnormality Detection Section 46 Start Feed Abnormality Detection Cutoff Section 47 Ejection Feed Abnormality Detection Cutoff Section W Work Material

Claims (2)

[Scope of utility model registration request] 1. A feed motor driven by a drive signal from a motor drive unit, and a rotating body rotated by the feed motor presses a work material placed on a table to transfer the work material in a certain direction. A transfer unit, a feed amount detection sensor for detecting the feed amount of the processed material, a feed amount setting unit for setting the feed amount of the processed material, and a feed amount and a feed amount detection sensor set in the feed amount setting unit. A control device for a work material transfer machine, comprising: a feed control unit that controls the feed motor drive unit so that a predetermined feed amount is obtained based on a length measurement signal,
A feed error detection unit that detects a feed error depending on the presence or absence of a detection signal from the feed amount detection sensor during the transfer of the work material, and the feed error detection unit from the start to the time when the feed amount detection sensor outputs the detection signal. And a start-up abnormality detection cut-off unit for cutting off the detection of the workpiece. 2. A feed motor driven by a drive signal from a motor drive unit and a rotating body rotated by the feed motor presses a work material placed on a table to move the work material in a certain direction. A transfer unit, a feed amount detection sensor for detecting the feed amount of the processed material, a feed amount setting unit for setting the feed amount of the processed material, and a feed amount and a feed amount detection sensor set in the feed amount setting unit. A control device for a work material transfer machine, comprising: a feed control unit that controls the feed motor drive unit so that a predetermined feed amount is obtained based on a length measurement signal,
A feed error detection unit that detects a feed error based on the presence or absence of a detection signal from the feed amount detection sensor during the transfer of the work material, and a discharge for cutting off the detection of the feed error detection unit for a predetermined time during the discharge of the work material An apparatus for controlling a work material transfer machine, which is provided with an abnormality detection cutoff section.