Control device for plate feeding device

Abstract

A control device for a plate supply device is provided that can measure the amount of plate material being transported to a processing device by a plate supply device with high precision. The control device (101) for a plate supply device (201) comprises a control unit (102) that controls the rotation of a first roll (202) and a second roll (203) of the plate supply device (201), a transmitter (103) that transmits electromagnetic waves (105) toward the plate material (100), and a receiver (104) that receives electromagnetic waves (106) reflected by the plate material (100). The control unit (102) measures the transport speed of the plate material (100) for a predetermined period based on the frequency of the electromagnetic waves (106) received by the receiver (104), and measures the amount of plate material (100) being transported based on the transport speed.

Description

Technology Field

[0001] The present invention relates to a control device for a plate supply device capable of measuring the amount of plate material conveyed to a processing device by the plate supply device with high precision. Background Technology

[0002] Patent document 1 discloses a die forging system comprising a press mechanism, a material supply mechanism, and a material dispenser. In this die forging system, the material supply mechanism sends the material from the material dispenser through the material supply mechanism to the press mechanism, measures the movement of the material in the material dispenser, and uses this to determine the desired timing of the material release mechanism, which is equipped with a material gripping mechanism that grips the material in cooperation with a supply drive roll. Prior art literature

[0003] Japanese Patent Publication No. 2004-520934 The problem to be solved

[0004] In the die forging system according to Patent Document 1, the material conveyed from the material dispenser through the material supply mechanism to the press mechanism moves due to vibration during press processing by the press mechanism. Because of this, the amount of material actually conveyed to the press mechanism differs from the amount of material conveyed from the material dispenser, and there is a problem in that the amount of material conveyed to the press mechanism cannot be measured. In addition, since the material generally does not have markings such as scales to measure the amount of material conveyed, there is a problem in that the amount of material conveyed to the press mechanism cannot be measured.

[0005] Accordingly, the objective of the present invention is to solve the above problem and provide a control device for a sheet metal supply device capable of measuring the amount of sheet metal conveyed in a processing device, such as a press device, with high precision. means of solving the problem

[0006] According to one aspect of the present invention, a control device for a plate supply device having a first roll and a second roll, wherein the plate is clamped by the first roll and the second roll and the plate is conveyed according to the rotation of the first roll and the second roll, comprises a control unit that controls the rotation of the first roll and the second roll, a transmitting unit that transmits electromagnetic waves toward the plate, and a receiving unit that receives electromagnetic waves reflected by the plate. The control unit measures the conveying speed of the plate over a predetermined period based on the frequency of the electromagnetic waves received by the receiving unit, and measures the conveying amount of the plate based on the conveying speed.

[0007] According to one embodiment of the present invention, in a control device for a plate supply device, the control unit measures the transport speed of the plate based on the difference between the frequency of the electromagnetic wave transmitted by the transmitting unit and the frequency of the electromagnetic wave received by the receiving unit.

[0008] According to one embodiment of the present invention, in a control device for a plate supply device, a transmitting unit transmits electromagnetic waves from two directions toward a plate, a receiving unit receives electromagnetic waves from two directions reflected by the plate, and a control unit measures the conveying speed of the plate by the difference in frequency of the electromagnetic waves from the two reflected directions.

[0009] According to one embodiment of the present invention, in a control device for a plate supply device, a receiving unit transmits a signal related to the return speed based on the frequency of the received electromagnetic wave to a control unit.

[0010] According to one embodiment of the present invention, in a control device for a plate supply device, a signal related to the conveying speed has a period based on the conveying speed of the plate.

[0011] According to one embodiment of the present invention, in a control device for a plate supply device, when the plate supply device is conveying a plate, the control unit controls the receiver unit to transmit a signal related to the conveying speed to the control unit.

[0012] According to one embodiment of the present invention, in a control device for a plate supply device, when the plate supply device is transporting a plate, the control unit controls the transmitter unit to transmit electromagnetic waves toward the plate.

[0013] According to one embodiment of the present invention, in a control device for a plate supply device, a control unit controls the conveying of a plate by the rotation of a first roll and a second roll, and a predetermined period is a period during which the plate is conveyed by the rotation of the first roll and the second roll.

[0014] According to one embodiment of the present invention, the plate supply device further comprises a release device for releasing a plate clamped by a first roll and a second roll, and in a control device for the plate supply device, the control unit controls the conveying of the plate by the release device, and a predetermined period is the period during which the plate is clamped by the first roll and the second roll.

[0015] According to one embodiment of the present invention, in a control device for a plate supply device, a control unit determines a predetermined period based on a status signal from a processing device that processes a plate returned from the plate supply device. Effects of the invention

[0016] According to the present invention, the amount of a plate material being transported in a processing device can be measured with high precision without using a mark for measurement.

[0017] In addition, other objects, features, and advantages of the present invention will become apparent from the description of the embodiments of the present invention below in relation to the accompanying drawings. Brief explanation of the drawing

[0018] FIG. 1 is a schematic diagram of a control device for a plate supply device as an embodiment of the present invention. FIG. 2a is a schematic diagram showing the reflection of electromagnetic waves from a plate material as one embodiment. FIG. 2b is a schematic diagram showing the reflection of electromagnetic waves from a plate material as another embodiment. Figure 3 is a timing diagram of a signal related to the return speed as an embodiment. Specific details for implementing the invention

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these embodiments.

[0020] Referring to FIGS. 1 to 3, a control device (101) for a plate supply device (201) as an embodiment of the present invention is described. The plate supply device (201) is equipped with a first roll (202) and a second roll (203), clamps a plate (100) by the first roll (202) and the second roll (203), and, as shown in FIG. 1, rotates the first roll (202) and the second roll (203) in the direction of the arrow, and is configured to convey the plate (100) in the direction of the arrow according to the rotation of the first roll (202) and the second roll (203). The plate (100) is conveyed by the plate supply device (201) to a processing device (301), such as a press device, and is processed by the processing device (301). The control device (101) comprises a control unit (102) that controls the rotation of the first roll (202) and the second roll (203) of the plate supply device (201), a transmitting unit (103) that transmits electromagnetic waves (105) toward the plate (100), and a receiving unit (104) that receives electromagnetic waves (106) reflected by the plate (100). The control unit (102) is connected to the plate supply device (201) via a plate supply control signal line (107) and controls the rotation of the first roll (202) and the second roll (203). The control unit (102) measures the conveying speed (v) of the plate (100) during a predetermined period determined by the control unit (102) based on the frequency of the electromagnetic waves (106) received by the receiving unit (104). Continuing, based on the measured conveying speed (v) of the plate (100), the control unit (102) measures the amount of plate (100) conveyed to the processing device (301) during a predetermined period. In FIG. 1, the control unit (102) is provided separately from the plate supply device (201) and the processing device (301), but it may be built into the plate supply device (201) or the processing device (301).In addition, in FIG. 1, the transmitting unit (103) and the receiving unit (104) are embedded in the processing device (301), but they may also be embedded in the plate supply device (201) to measure the amount of plate (100) being transported before or after the plate (100) passes through the first roll (202) and the second roll (203), or they may be provided at a location as needed. In addition, the entire control device (101) may be embedded in the plate supply device (201) that transports the plate (100), or they may be embedded in the processing device (301), such as a press device, that processes the plate (100) transported from the plate supply device (201).

[0021] The control unit (102) may measure the transport speed (v) of the plate material (100) based on the difference between the frequency of the electromagnetic wave (105) transmitted by the transmitting unit (103) and the frequency of the electromagnetic wave (106) received by the receiving unit (104). In FIG. 2a, the transmitting unit (103) transmits the electromagnetic wave (105) to the plate material (100) at an angle of incidence θ, and the receiving unit (104) receives the electromagnetic wave (106) reflected from the plate material (100) at an angle of reflection θ. The frequency of the electromagnetic wave (105) transmitted by the transmitting unit (103) is f T If the speed of the electromagnetic waves (105, 106) is c, then the frequency f of the electromagnetic waves (106) received by the receiver (104) R It is represented by equation (1) due to the Doppler effect.

[0022]

[0023] The control unit (102) mixes the electromagnetic wave (105) transmitted by the transmitting unit (103) and the electromagnetic wave (106) received by the receiving unit (104), and the difference in frequency f of the two electromagnetic waves (106). T -f R From (2), a signal having the frequency of the equation can be obtained.

[0024]

[0025] The control unit (102) can measure the conveying speed (v) of the plate material (100) from the frequency of equation (2). Then, by measuring the conveying speed (v) over a predetermined period, the length of the conveying of the plate material (100) over the predetermined period, that is, the amount of the plate material (100) conveyed to the processing device (301) over the predetermined period can be measured. In this way, even if the material (100) does not have a mark for measuring the amount of conveying, such as a scale, the amount of the conveying of the plate material (100) can be measured by the Doppler effect of the electromagnetic wave.

[0026] In FIG. 2b, the transmitter (103) transmits electromagnetic waves (105) toward the plate (100) from two directions. In this case, the transmitter (103) has an electromagnetic wave source, a beam splitter, and a mirror. The electromagnetic waves generated from the electromagnetic wave source of the transmitter (103) are split into two by the beam splitter, one electromagnetic wave (105) is transmitted as is to the plate (100) at an angle of incidence θ, and the other electromagnetic wave (105) is reflected by the mirror and transmitted to the plate (100) at an angle of incidence θ opposite to that of the one electromagnetic wave (105). The frequency of the electromagnetic waves (105) transmitted by the transmitter (103) is f T If the speed of the electromagnetic waves (105, 106) is c, then the frequency f of the electromagnetic wave (106) when one electromagnetic wave (105) is reflected by the plate material (100) R1 It is represented by equation (3) due to the Doppler effect.

[0027]

[0028] In addition, the frequency f of the electromagnetic wave (106) when the electromagnetic wave (105) from the other side is reflected by the plate material (100). R2 This is expressed by equation (4) due to the Doppler effect.

[0029]

[0030] Electromagnetic waves (105) from two directions are reflected by the plate material (100), and the receiving part (104) has a frequency f R1 Electromagnetic waves (106) having and frequency f R2 Two electromagnetic waves (106) having different frequencies are received as electromagnetic waves (106). The control unit (102) heterodyne processes these two electromagnetic waves (106) received by the receiving unit (104) and the difference in frequency f of these two electromagnetic waves (106) R2 -f R1 From (5), a signal having the frequency of the equation can be obtained.

[0031]

[0032] The control unit (102) can measure the conveying speed (v) of the plate material (100) from the frequency of equation (5). Then, by measuring the conveying speed (v) over a predetermined period, the length of the conveying of the plate material (100) over the predetermined period, that is, the amount of the plate material (100) conveyed to the processing device (301) over the predetermined period can be measured. In this way, even if the material (100) does not have a mark such as a scale to measure the amount of conveying, the amount of the conveying of the plate material (100) can be measured by the Doppler effect of the electromagnetic wave.

[0033] The transmitting unit (103) is connected to the control unit (102) via an electromagnetic wave control signal line (108), and the receiving unit (104) is connected to the control unit (102) via a carrier speed related signal line (109). The receiving unit (104) receives an electromagnetic wave (106) having a frequency such as Equation (1), Equation (3), and Equation (4), which is different from the frequency of the electromagnetic wave (105) transmitted by the transmitting unit (103) as described above, and transmits a carrier speed related signal based on the frequency of the received electromagnetic wave (106) to the control unit (102) via the carrier speed related signal line (109). For example, the receiver (104) may transmit a signal related to the frequency of the received electromagnetic wave (106), such as equation (1), equation (3), and equation (4), to the control unit (102) via a signal line (109) related to the carrier speed, or transmit a signal related to mixing processing, such as equation (2), and heterodyne processing, such as equation (5), to the control unit (102) via a signal line (109) related to the carrier speed. These signals have a frequency, i.e., a period, based on the carrier speed (v) of the plate (100), as in equations (1) to (5). Additionally, these signals may include information related to the carrier speed (v) of the plate (100).

[0034] The control unit (102) may control the receiving unit (104) to transmit a signal related to the conveying speed to the control unit (102) when the plate supply device (201) is conveying the plate (100). Additionally, the control unit (102) may control the transmitting unit (103) to transmit an electromagnetic wave (105) toward the plate (100) when the plate supply device (201) is conveying the plate (100). When the plate supply device (201) starts conveying the plate (100), as shown in FIG. 3, the control unit (102) sets the conveying timing to the H level via the electromagnetic wave control signal line (108) and controls the transmitting unit (103) to transmit the electromagnetic wave (105) toward the plate (100). The receiver (104) receives the electromagnetic waves (106) reflected by the plate (100) and transmits a measurement result pulse, which is a signal related to the transport speed, to the control unit (102) via a signal line (109) related to the transport speed. The measurement result pulse may be an AB phase output with phases shifted 90° relative to each other, as shown in FIG. 3. The measurement result pulse has a frequency based on the transport speed (v) of the plate (100), and the frequency increases when the transport speed (v) of the plate (100) increases, and decreases when the transport speed (v) of the plate (100) decreases. Based on the measurement result pulse, the amount of transport of the plate (100) to the processing device (301) is measured. Additionally, when the plate supply device (201) finishes transporting the plate (100), as shown in FIG. 3, the control unit (102) controls the transport timing to L level via the electromagnetic wave control signal line (108) and controls the transmission unit (103) to stop transmitting the electromagnetic wave (105) to the plate (100). In this way, the transport speed (v) of the plate (100) during the period when the transport timing is H level can be measured, and the amount of the plate (100) transported to the processing device (301) can be measured.

[0035] Additionally, the control unit (102) may directly transmit the return timing to the receiver (104). In this case, when the control unit (102) sets the return timing to the H level, the receiver (104) transmits a return speed-related signal to the control unit (102) via a return speed-related signal line (109), and when the control unit (102) sets the return timing to the L level, the receiver (104) stops transmitting the return speed-related signal to the control unit (102). Additionally, the control unit (102) may not transmit the return timing to the transmitter (103) and the receiver (104). In this case, the receiving unit (104) transmits a signal related to the return speed to the control unit (102) through a signal line (109) related to the return speed at all times, but the control unit (102) generates a period in which the return timing is at the H level from the signal related to the return speed transmitted from the receiving unit (104), measures the return speed (v) of the plate (100) based on the signal related to the return speed of the generated period, and subsequently measures the amount of return of the plate (100) returned to the processing device (301) during the generated period based on the measured return speed (v) of the plate (100).

[0036] The control unit (102) controls the rotation of the first roll (202) and the second roll (203) of the plate supply device (201) via the plate supply control signal line (107), thereby controlling the conveyance of the plate (100) by the rotation of the first roll (202) and the second roll (203). The predetermined period during which the amount of conveyance of the plate (100) to the processing device (301) is measured may be the period during which the plate (100) is conveyed by the rotation of the first roll (202) and the second roll (203).

[0037] The plate supply device (201) may further include a release device (204) for releasing a plate (100) clamped by a first roll (202) and a second roll (203). The release device (204) may be connected to either the first roll (202) or the second roll (203), and by the release device (204) raising and lowering the first roll (202) and / or the second roll (203), the plate (100) is clamped or released. The control unit (102) controls the transport of the plate (100) by controlling the release device (204) via a plate supply control signal line (107). The predetermined period during which the amount of plate material (100) being returned to the processing device (301) is measured may be the period during which the plate material (100) is clamped by the first roll (202) and the second roll (203).

[0038] The processing device (301) processes the sheet metal (100) that has been transported from the sheet metal supply device (201). If the processing device (301) is a press device, the processing device (301) is equipped with an upper mold (302) and a lower mold (303), and the sheet metal (100) is punched by the cooperation of the upper mold (302) and the lower mold (303). When processing such as punching is being performed by the processing device (301), it is necessary to stop the transport of the sheet metal (100). For this reason, the processing device (301) transmits a state signal regarding the state of the processing device (301), that is, a signal indicating whether the sheet metal (100) should be transported or whether the transport of the sheet metal (100) should be stopped, to the control unit (102) via a state signal line (111). Based on a signal from the processing device (301), the control unit (102) determines the period for rotating the first roll (202) and the second roll (203), the period for the first roll (202) and the second roll (203) to clamp the plate (100), and further determines a predetermined period for measuring the amount of plate (100) being transported to the processing device (301) as described above. The amount of plate (100) being transported measured by the control unit (102) may be transmitted to the processing device (301) via a transport amount signal line (110), and may also be displayed on a display device such as a display.

[0039] The plate supply device (201) intermittently conveys a certain amount of plate material (100) to the processing device (301), and the control device (101) of the present invention can measure the amount of plate material (100) conveyed to the processing device (301) by the plate supply device (201) with high precision. The measured amount of plate material (100) conveyed can be used to adjust the conveying speed of the plate material (100) to the processing device (301), the amount of plate material (100) conveyed to the processing device (301), the stopping position of the plate material (100) in the processing device (301), etc.

[0040] Although the above description has been made with respect to specific embodiments, the present invention is not limited thereto, and it is obvious to those skilled in the art that various changes and modifications can be made within the scope of the principles of the present invention and the appended claims. Explanation of the symbols

[0041] 100 boards 101 Control Unit 102 Control Unit 103 Transmitter 104 receiver 105 Transmitted electromagnetic waves 106 Reflected electromagnetic waves 107 Plate supply control signal line 108 Electromagnetic Control Signal Line 109 Signal lines related to carrier speed 110 Carrier signal line 111 status signal line 201 Sheet metal feeder 202 First Roll 203 2nd Roll 204 Release Device 301 Machining Device 302 Upper mold 303 Lower mold

Claims

Claim 1 A control device for a plate supply device comprising a first roll and a second roll, wherein the plate is clamped by the first roll and the second roll and the plate is conveyed according to the rotation of the first roll and the second roll, wherein the control device comprises a control unit for controlling the rotation of the first roll and the second roll, a transmitter for transmitting electromagnetic waves toward the plate, and a receiver for receiving the electromagnetic waves reflected by the plate, wherein the transmitter and the receiver are arranged within a processing device for processing the plate conveyed from the plate supply device, and wherein the control unit determines the period during which the first roll and the second roll clamp the plate based on a status signal indicating whether processing is being performed input from the processing device, sets the clamping period to a predetermined period, and determines the conveying speed of the plate during the predetermined period based on the frequency of the electromagnetic waves received by the receiver A control device that measures and measures the amount of plate material returned based on the return speed and the predetermined period. Claim 2 In claim 1, the control unit is a control device that measures the transport speed of the plate material based on the difference between the frequency of the electromagnetic wave transmitted by the transmitting unit and the frequency of the electromagnetic wave received by the receiving unit. Claim 3 A control device according to claim 1, wherein the transmitting unit transmits electromagnetic waves from two directions toward the plate, the receiving unit receives electromagnetic waves from the two directions reflected by the plate, and the control unit measures the transport speed of the plate by the difference in frequency of the reflected electromagnetic waves from the two directions. Claim 4 A control device according to any one of claims 1 to 3, wherein the receiving unit transmits a signal related to the carrier speed based on the frequency of the received electromagnetic wave to the control unit. Claim 5 In claim 4, the above-mentioned signal related to the return speed is a control device having a period based on the return speed of the plate. Claim 6 In claim 4, when the plate supply device is conveying the plate, the control unit controls the receiver to transmit the conveying speed-related signal to the control unit. Claim 7 In claim 4, when the plate supply device is conveying the plate, the control unit controls the transmitter to transmit the electromagnetic wave toward the plate. Claim 8 In any one of claims 1 to 3, the plate supply device further comprises a release device for releasing the plate clamped by the first roll and the second roll, and the control unit controls the conveying of the plate by the release device. Claim 9 delete Claim 10 delete

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