WO2017179355A1 - プレスブレーキの安全装置及びプレスブレーキの制御方法 - Google Patents
プレスブレーキの安全装置及びプレスブレーキの制御方法 Download PDFInfo
- Publication number
- WO2017179355A1 WO2017179355A1 PCT/JP2017/010085 JP2017010085W WO2017179355A1 WO 2017179355 A1 WO2017179355 A1 WO 2017179355A1 JP 2017010085 W JP2017010085 W JP 2017010085W WO 2017179355 A1 WO2017179355 A1 WO 2017179355A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- mold
- die
- upper table
- punch
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 46
- 239000000463 material Substances 0.000 claims abstract description 78
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 68
- 238000010586 diagram Methods 0.000 description 5
- 230000002457 bidirectional effect Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/004—Bending sheet metal along straight lines, e.g. to form simple curves with program control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/166—Electrical control arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/18—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
- B30B15/285—Arrangements for preventing distortion of, or damage to, presses or parts thereof preventing a full press stroke if there is an obstruction in the working area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
- F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
- F16P3/144—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using light grids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
Definitions
- This disclosure relates to a press brake safety device and a press brake control method.
- the press brake includes an upper table on which a punch mold is mounted and a lower table on which a die mold is mounted.
- the press brake lowers the upper table to the lower table, and bends the metal material between the punch die and the die die.
- the press brake detects that an intruder such as a human hand has entered and bends it in order to prevent human hands from entering the area where the punch mold descends.
- a safety device is provided to stop the machining operation.
- Patent Document 1 describes that a safety interval is 6 to 14 mm. However, disabling the safety device even at such a relatively short distance is not preferable.
- an object of the present invention is to provide a press brake safety device and a press brake control method capable of stopping the bending operation.
- a press brake comprising an upper table for holding a punch die, a lower table for holding a die die, and an actuator for lowering and raising the upper table.
- a safety device mounted on the upper table and emitting a laser beam so as to pass between the punch mold and the die mold; mounted on the upper table; and the punch mold and the A photodetector having a photodetector for detecting the laser beam that has passed between the die mold and determining whether the laser beam is in a light-receiving state or a light-blocking state in which the laser beam is not received;
- the actuator lowers the upper table in order to bend the material disposed on the die mold between the punch mold and the die mold, A first distance between the tip of the punch die on the die die side and an upper end of the material on the punch die side is equal to or greater than a second distance between the tip of the punch die and the photodetector.
- a safety device for a press brake comprising: a safety control unit that controls to keep the descent of the upper table without stopping even if it is determined that the light receiver is in a light shielding state during the period Is provided.
- the laser beam passes between the punch mold held by the upper table and the die mold held by the lower table by the projector mounted on the upper table.
- the light receiver is based on whether or not a light detector included in the light receiver mounted on the upper table detects the laser light that has passed between the punch mold and the die mold.
- an actuator for lowering and raising the upper table is configured to transfer the material disposed on the die mold to the punch mold and the When the upper table is lowered to bend and bend with a die mold, a first end of the punch mold on the die mold side and a top end of the material on the punch mold side distance
- the light receiver is determined to be in a light-shielding state during a period that satisfies a condition that is greater than or equal to a second distance between the tip of the punch mold and the photodetector, the lowering of the upper table is stopped.
- the actuator Controlling the actuator, and when the actuator is lowering the upper table to bend the material placed on the die mold between the punch mold and the die mold, In a period that satisfies the condition that the first distance is less than the second distance, the actuator is configured to continue the descent without stopping the descent of the upper table even if it is determined that the light receiver is in a light shielding state.
- a method for controlling a press brake characterized in that control is performed.
- the bending operation is performed when the laser beam is blocked by the material without setting a region for disabling the safety device above the material. If the laser beam is blocked by the intruder without stopping, the bending operation can be stopped.
- FIG. 1 is a diagram illustrating a schematic configuration of a press brake safety device according to an embodiment.
- FIG. 2 is a block diagram illustrating a specific configuration of a safety device for a press brake according to an embodiment.
- FIG. 3 is a schematic plan view showing the arrangement of the photodiodes when the light receiver is viewed from the projector.
- FIG. 4 is a diagram illustrating parameters used to determine whether or not the safety control unit performs a safe operation during normal bending in which a material having no flange is bent.
- FIG. 5 is a diagram illustrating parameters used to determine whether or not the safety control unit performs a safety operation when bending a box in which a material having a flange is bent.
- FIG. 1 is a diagram illustrating a schematic configuration of a press brake safety device according to an embodiment.
- FIG. 2 is a block diagram illustrating a specific configuration of a safety device for a press brake according to an embodiment.
- FIG. 3 is a schematic plan view showing the arrangement
- FIG. 6 is a block diagram illustrating a functional internal configuration example of the safety control unit.
- FIG. 7 is a table summarizing, in tabular form, stop conditions for stopping the bending operation during normal bending and box bending and non-stop conditions for not stopping.
- FIG. 8 is a perspective view showing an example of a material that is bent by a press brake.
- FIG. 9 is a perspective view showing a state where the material shown in FIG. 8 is being bent.
- FIG. 10 is a flowchart showing processing when the press brake control device controls the press brake to execute the bending process of the material.
- the press brake includes an upper table 10 and a lower table 20.
- the upper table 10 is configured to move up and down by hydraulic cylinders 11L and 11R provided on the left and right.
- Actuators 12L and 12R drive hydraulic cylinders 11L and 11R, respectively.
- the actuators 12L and 12R include, for example, a bidirectional rotary pump 121 and a motor 122 that rotates the bidirectional rotary pump 121 forward or backward.
- the press brake control device 50 controls the motor 122 to rotate the motor 122 in the normal direction
- the bidirectional rotary pump 121 can rotate in the normal direction to lower the hydraulic cylinders 11L and 11R.
- the press brake control device 50 controls the motor 122 to reverse the motor 122
- the bidirectional rotary pump 121 can reverse and raise the hydraulic cylinders 11L and 11R.
- the press brake control device 50 can be configured by an NC device.
- the linear encoders 13L and 13R detect the vertical position of the upper table 10.
- the position information detected by the linear encoders 13L and 13R is supplied to the press brake control device 50 and a safety control unit 42 described later.
- the press brake control device 50 controls the position of the upper table 10 in the vertical direction based on the position information.
- An upper mold holder (not shown) is attached to the upper table 10, and a lower mold holder (not shown) is attached to the lower table 20.
- a punch die 14 is attached to the upper die holder, and a die die 24 is attached to the lower die holder.
- the upper table 10 holds the punch mold 14 and the lower table 20 holds the die mold 24.
- the material W which is a flat plate material, is disposed on the die mold 24. When the upper table 10 is lowered, the material W is sandwiched between the punch die 14 and the die die 24 and bent.
- a projector 30 is mounted on the left side of the upper table 10 via an arm 15L.
- a light receiving unit 40 including a light receiver 41 and a safety control unit 42 is mounted on the right side of the upper table 10 via an arm 15R.
- the safety control unit 42 may be provided outside the light receiving unit 40.
- the light projector 30 emits laser light L30 toward the light receiver 41 so as to pass between the punch mold 14 and the die mold 24, and the light receiver 41 receives the laser light L30.
- the light receiver 41 receives the laser light L30 until the laser light L30 is blocked by the material W.
- the safety control unit 42 determines whether to stop the lowering of the upper table 10 depending on whether the light receiver 41 is in a light receiving state in which the laser light L30 is received or in a light blocking state in which the laser light L30 is not received.
- a signal Sstop is generated and output. The stop signal Sstop indicates that the descent of the upper table 10 is continued without stopping if the value is “0”, and the descent of the upper table 10 is stopped if the value is “1”.
- the safety control unit 42 If the light receiver 41 receives the laser beam L30, the laser beam L30 is not blocked by an intruder such as a hand. Therefore, the safety control unit 42 outputs a value “0” as the stop signal Sstop. If the laser beam L30 is blocked by an intruder such as a hand while the upper table 10 is descending, the light receiver 41 does not receive the laser beam L30. Therefore, the safety control unit 42 outputs the value “1” as the stop signal Sstop.
- the safety control unit 42 sets a value “ It is configured not to output 1 ′′.
- the press brake control device 50 stops the lowering of the upper table 10 and interrupts the bending of the material by the press brake.
- the projector 30 includes a laser light source 301 and a collimator lens 302 that converts the laser beam of the diffused light emitted from the laser light source 301 into a laser beam L30 that is parallel light.
- the light receiver 41 has, for example, six photodiodes Pd1 to Pd6. For convenience, numbers 1 to 6 are assigned to the photodiodes Pd1 to Pd6, respectively.
- a photodiode is an example of a photodetector. The photodiodes Pd1 to Pd6 individually detect the light receiving state and the light shielding state of the laser light L30.
- the light receiver 41 amplifies the output signals of the photodiodes Pd1 to Pd6 and determines whether or not the laser light L30 is blocked based on the current values output from the amplifiers Ap1 to Ap6. And a discriminant value output unit 411 for outputting a value.
- the discriminant value output unit 411 may be configured by a circuit or a processor.
- FIG. 3 shows the arrangement of the photodiodes Pd1 to Pd6 when the light receiver 41 is viewed from the projector 30.
- FIG. The right side of FIG. 3 is the front side of the press brake, and the left side is the back side of the press brake.
- the photodiodes Pd1 to Pd3 are arranged in the vertical direction along the movement path of the punch die 14 when the punch die 14 descends in the direction of the die die 24.
- the photodiodes Pd1 to Pd3 are arranged on the moving path or slightly behind the moving path.
- the photodiodes Pd4 to Pd6 are arranged in the vertical direction in front of the movement path.
- the photodiodes Pd1 and Pd4, Pd2 and Pd5, Pd3 and Pd6 are arranged at the same position in the vertical direction.
- the number of photodiodes disposed along the movement path of the punch die 14 and the number of photodiodes disposed in front of the movement path is not limited to three, but may be two or four or more. .
- the number of photodiodes that receive the laser beam L30 is not limited. The larger the number of photodiodes, the easier it is to detect intruders.
- the discriminant value output unit 411 indicates that the laser light L30 is not blocked when the amplifiers Ap1 to Ap6 receive the laser light L30 and a current value of a predetermined level or more is output from the amplifiers Ap1 to Ap6.
- the discriminant value “0” is output.
- the discrimination value output unit 411 outputs the laser beam L30.
- the discriminant value “1” indicating the interruption is output.
- the safety control unit 42 has two central processing units (CPUs) 421 and 422.
- the discrimination value output from the discrimination value output unit 411 is supplied to the CPUs 421 and 422.
- the signal line from the discriminant value output unit 411 to the CPUs 421 and 422 is represented by one, but the CPUs 421 and 422 have discriminant values Det1 to Det6 based on the output signals of the photodiodes Pd1 to Pd6, respectively. Are supplied in parallel.
- the CPU 421 and 422 are supplied with a press brake stroke which is position information detected by the linear encoders 13L and 13R.
- the press brake stroke is one of the parameters.
- various parameters of the press brake (including the safety device) are supplied from the press brake control device 50 to the CPUs 421 and 422.
- the parameters supplied from the press brake control device 50 to the CPUs 421 and 422 include information about the punch mold 14 and the die mold 24, information about the material W, and information about the mounting positions of the photodiodes Pd1 to Pd6.
- the press brake control device 50 may supply the press brake stroke to the CPUs 421 and 422.
- the CPUs 421 and 422 detect whether or not an intruder such as a hand has entered the area in which the punch die 14 descends based on the input parameters and the discrimination value output from the discrimination value output unit 411.
- the safety control unit 42 has two CPUs 421 and 422 so that the lowering of the upper table 10 is surely stopped when an intruder such as a hand enters the area where the punch die 14 is lowered. As a result, even if one of the CPUs fails, a safe operation can be performed.
- the safety control unit 42 may be composed of one CPU or may be composed of three or more CPUs.
- the safety control unit 42 is configured by a CPU and the presence / absence of an intruder is detected by software.
- the safety control unit 42 may be configured by a hardware circuit to detect the presence / absence of an intruder.
- the press brake control device 50 has a slide control processing unit 501.
- a target stroke for bending the material W is given to the slide control processing unit 501.
- the slide control processing unit 501 controls the actuators 12L and 12R to lower the upper table 10 by the target stroke.
- the CPU 421 or 422 supplies the value “1” to the slide control processing unit 501 as the stop signal Sstop, the slide control processing unit 501 controls the actuators 12L and 12R to stop the lowering of the upper table 10.
- FIG. 4 shows a case where the flat material W is bent
- FIG. 5 shows a case where the material W having a flange WF rising upward (on the punch die 14 side) on the side of the flat plate material is bent.
- the bending process as shown in FIG. 4 is called normal bending
- the bending process as shown in FIG. 5 is called box bending.
- the safety control unit 42 (CPUs 421 and 422) causes the stroke St, which is the distance from the lower end of the upper table 10 to the upper end of the lower table 20, as shown in FIG. Is supplied.
- the stroke St is a value that changes as the upper table 10 descends or rises.
- the safety control unit 42 can obtain the stroke St based on the position information of the upper table 10 detected by the linear encoders 13L and 13R.
- the press brake control device 50 supplies parameters other than the stroke St shown in FIG. 4 or FIG. 5 to the safety control unit 42 at the start of the machining program.
- the parameters that the press brake control device 50 supplies to the safety control unit 42 are as follows in more detail.
- the press brake control device 50 includes photodiodes Pd1, Pd4, and Pd2 from the height Th of the punch die 14, the height Dh of the die die 24, and the tip of the punch die 14 (end portion on the die die 24 side). And information indicating the distances h1 to h3 to Pd5, Pd3, and Pd6 is supplied to the safety control unit. The distances h1 to h3 are preset fixed values. The press brake control device 50 supplies a value indicating the flange height Fh to the safety control unit 42 in the case of the material W having the plate thickness t and the flange WF.
- FIG. 6 shows a functional internal configuration example of the CPUs 421 and 422.
- an adder 4201 adds the values of the height Th of the punch die 14, the height Dh of the die die 24, and the sheet thickness t, and calculates a value indicating (Th + Dh + t).
- the subtractor 4202 calculates a distance H from the tip of the punch die 14 to the upper end of the material W by subtracting a value indicating (Th + Dh + t) from the stroke St.
- a distance H in FIG. 4 is a distance from the tip of the punch die 14 to the upper surface of the material W.
- a distance H in FIG. 5 is a distance from the tip of the punch die 14 to the upper surface of the flat portion of the material W.
- the flange height Fh is input to the subtractor 4203.
- the subtractor 4203 calculates a distance Hf from the tip of the punch die 14 to the upper end of the flange WF shown in FIG. 5 by subtracting the flange height Fh from the distance H. In the portion where the flange WF exists, the upper end of the flange WF becomes the upper end of the material W.
- a value indicating the distance H is input to the terminal Ta of the switch 4204, and a value indicating the distance Hf is input to the terminal Tb.
- a selection signal Ssel is supplied to the switch 4204 from the press brake control device 50. The switch 4204 selects the terminal Ta when the selection signal Ssel indicates normal bending, and selects the terminal Tb when the selection signal Ssel indicates box bending.
- the comparators 4205 to 4207 and 4211 to 4213 all receive a value indicating the distance H. Comparators 4205 and 4211, 4206 and 4212, 4207 and 4213 are input with values indicating distances h1 to h3, respectively.
- Comparators 4205 and 4211, 4206 and 4212, 4207 and 4213 compare the value indicating distance H with the values indicating distances h1 to h3, respectively, and values are satisfied if H ⁇ h1, H ⁇ h2, and H ⁇ h3 are satisfied. Outputs “1”.
- Satisfying H ⁇ h3 means that the upper table 10 is not lowered to a position where the positions of the photodiodes Pd3 and Pd6 reach the upper surface of the material W.
- Satisfying H ⁇ h2 means that the upper table 10 is not lowered to a position where the positions of the photodiodes Pd2 and Pd5 reach the upper surface of the material W.
- Satisfying H ⁇ h1 means that the upper table 10 does not descend to a position where the positions of the photodiodes Pd1 and Pd4 reach the upper surface of the material W.
- the value “1” is supplied to the AND circuits 4208 to 4210 and 4214 to 4216, respectively.
- the AND circuits 4208 to 4210 are supplied with determination values Det1 to Det3 based on the output signals of the photodiodes Pd1 to Pd3, respectively, and the AND circuits 4214 to 4216 are respectively determined based on the output signals of the photodiodes Pd4 to Pd6. Values Det4 to Det6 are supplied.
- the discrimination values Det1 to Det6 are the discrimination value “0”. Therefore, the CPUs 421 and 422 output a value “0” indicating that the lowering of the upper table 10 is not stopped as the stop signal Sstop which is the output of the AND circuits 4208 to 4210 and 4214 to 4216.
- the CPUs 421 and 422 output a value “1” indicating that the lowering of the upper table 10 is stopped as the stop signal Sstop.
- Comparators 4205 and 4211, 4206 and 4212, 4207 and 4213 compare the value indicating distance H with the values indicating distances h1 to h3, respectively, and values are satisfied if H ⁇ h1, H ⁇ h2, and H ⁇ h3 are satisfied. Outputs “0”.
- the comparators 4207 and 4213 output the value “0”.
- the discrimination values Det3 and Det6 become the discrimination value “1”. Since the AND circuits 4210 and 4216 are supplied with the value “0” from the comparators 4207 and 4213, the outputs of the AND circuits 4210 and 4216 have the value “0”.
- the CPUs 421 and 422 do not output the value “1” indicating that the lowering of the upper table 10 is stopped as the stop signal Sstop, and the value “0” indicating that the lowering of the upper table 10 is not stopped. Is output, and the lowering of the upper table 10 is continued.
- the positions of the photodiodes Pd2 and Pd5 reach the upper surface of the material W, and the comparators 4206 and 4212 output the value “0”.
- the discrimination values Det2 and Det5 become the discrimination value “1”.
- the CPUs 421 and 422 output a value “0” indicating that the lowering of the upper table 10 is not stopped as the stop signal Sstop, and continues the lowering of the upper table 10.
- the CPUs 421 and 422 output a value “0” indicating that the lowering of the upper table 10 is not stopped as the stop signal Sstop, and continues the lowering of the upper table 10.
- the light receiver 41 After the machining program is started and until the bending of the material W is completed, the light receiver 41 is always operating regardless of the position of the upper table 10, and outputs the discrimination values Det1 to Det6. Therefore, there is no period during which the safety control unit 42 is disabled, and the safety control unit 42 is always operating, so that safety can be improved.
- the press brake control device 50 After completion of the bending of the material W, the press brake control device 50 (slide control processing unit 501) raises the upper table 10. When the upper table 10 is raised, it is not necessary to operate the safety operation described above.
- the safety control unit 42 may forcibly set the stop signal Sstop to the value “0” when the stroke St increases.
- a value indicating the distance H is input to the comparators 4205 to 4207. Since the terminal Tb is selected by the selection signal Ssel at the time of box bending, a value indicating the distance Hf from the tip of the punch die 14 to the upper end of the flange WF is input to the comparators 4211 to 4213.
- the discrimination value Det6 becomes the discrimination value “1”.
- the CPUs 421 and 422 output a value “0” indicating that the lowering of the upper table 10 is not stopped as the stop signal Sstop, and continues the lowering of the upper table 10.
- the discrimination value Det5 becomes the discrimination value “1”.
- the CPUs 421 and 422 output a value “0” indicating that the lowering of the upper table 10 is not stopped as the stop signal Sstop, and continues the lowering of the upper table 10.
- the CPUs 421 and 422 output a value “0” indicating that the lowering of the upper table 10 is not stopped as the stop signal Sstop, and continues the lowering of the upper table 10.
- i of hi is 1, 2, or 3.
- the safety control unit 42 determines whether or not to stop the lowering of the upper table 10 depending on whether each of the determination values Det1 to Det6 is the determination value “0” or the determination value “1”.
- the safety control unit 42 does not stop the lowering of the upper table 10 even if any of the determination values Det1 to Det6 becomes the determination value “1”.
- the safety control unit 42 determines whether or not to stop the lowering of the upper table 10 depending on whether each of the determination values Det1 to Det6 is the determination value “0” or the determination value “1”.
- the safety control unit 42 does not stop the lowering of the upper table 10 even if any of the determination values Det1 to Det6 becomes the determination value “1”.
- the bending operation is performed when the laser beam is blocked by the intruder regardless of whether the material W has the flange WF or not.
- the bending operation can be continued.
- the press brake control device 50 receives processing data indicating how to process the material W from a server or a computer in step S1.
- the processing data includes shape data of the material W.
- the press brake control device 50 automatically determines the processing order based on the processing data. The operator may manually set the processing order.
- step S3 the press brake control device 50 determines whether each of the sides Ws1 to Ws4 is a normal bending or a box bending. If it is box bending, the press brake control device 50 automatically calculates the height Fh of the flange WF in step S3. An operator may manually set the height Fh of the flange WF.
- the press brake control device 50 can set a selection signal Ssel indicating normal bending and a selection signal Ssel indicating box bending for each bending process of the sides Ws1 to Ws4.
- the press brake control device 50 transmits various parameters including the height Fh of the flange WF to the safety control unit 42 in step S4.
- the press brake control device 50 starts bending in step S5.
- the bending process here is the first bending process when there are a plurality of bending processes such as the sides Ws1 to Ws4.
- the press brake control device 50 determines whether or not the value “1” is input as the stop signal Sstop from the safety control unit 42 in step S6. If the value “1” is not input (NO), the press brake control device 50 determines whether or not the machining is completed in step S7. If the machining has not been completed (NO), the press brake control device 50 repeats the processes of steps S6 and S7.
- the press brake control device 50 raises the upper table 10 and determines whether or not there is a next bending process in step S8. If there is a next bending process (YES), the operator places the material W on the punch die 14 for the next bending process, and again responds to the operation to start the process by the operator in step S5. Start bending. Thereafter, the processes in steps S5 to S8 are repeated until all the bending processes are completed. If there is no next bending process in step S8 (NO), it means that all the bending processes have been completed, and the press brake control device 50 ends the process.
- step S6 When the value “1” is input in step S6 during the above bending process (YES), this means that an intruder such as a hand has entered the area where the punch die 14 is lowered. Therefore, in step S9, the press brake control device 50 stops the lowering of the upper table 10, interrupts the bending process, and ends the bending process.
- the press brake control device 50 suspends the bending process and then stops the bending process when instructed to resume the bending process in step S9.
- the bending process may be continued by resuming. In this case, the press brake control device 50 may move to step S7 after step S9.
- the press brake safety device and the press brake control method of the present embodiment since no region for disabling the safety device is set above the material W, safety can be improved.
- the bending operation is performed when an intruder such as a hand blocks the laser beam regardless of whether the material W has a flange or not. When the material W blocks the laser beam, the bending operation can be stopped.
- the present invention can be used to improve the safety of the press brake.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
Description
Claims (8)
- パンチ金型を保持するための上部テーブルと、ダイ金型を保持するための下部テーブルと、前記上部テーブルを下降及び上昇させるアクチュエータとを備えるプレスブレーキの安全装置であり、
前記上部テーブルに装着され、前記パンチ金型と前記ダイ金型との間を通過するようにレーザ光を射出する投光器と、
前記上部テーブルに装着され、前記パンチ金型と前記ダイ金型との間を通過したレーザ光を検出する光検出器を有して、前記レーザ光を受光する受光状態であるか前記レーザ光を受光しない遮光状態であるかを判別する受光器と、
前記アクチュエータが、前記ダイ金型上に配置された材料を前記パンチ金型と前記ダイ金型とで挟んで曲げ加工するために前記上部テーブルを下降させているとき、前記パンチ金型の前記ダイ金型側の先端と前記材料の前記パンチ金型側の上端との第1の距離が、前記パンチ金型の前記先端と前記光検出器との第2の距離以上である条件を満たす期間においては、前記受光器が遮光状態であると判別したら、前記上部テーブルの下降を停止させるよう制御し、前記第1の距離が前記第2の距離未満である条件を満たす期間においては、前記受光器が遮光状態であると判別しても、前記上部テーブルの下降を停止させず下降を継続させるよう制御する安全制御部と、
を備えることを特徴とするプレスブレーキの安全装置。 - 前記受光器は、前記パンチ金型の移動経路に沿って配列された第1の複数の光検出器と、前記第1の複数の光検出器よりも前側に配列された第2の複数の光検出器とを有し、前記第1及び第2の複数の光検出器それぞれの光検出器が個別に前記レーザ光を検出したか否かに基づいて、受光状態であるか遮光状態であるかを判別することを特徴とする請求項1に記載のプレスブレーキの安全装置。
- 前記材料が平板状の板材の側方に前記パンチ金型側に立ち上がるフランジを有するとき、
前記安全制御部は、
前記受光器が、前記第1の複数の光検出器が前記レーザ光を検出したか否かに基づいて受光状態であるか遮光状態であるかを判別するときには、前記板材の上端を前記材料の前記パンチ金型側の上端として前記第1の距離を算出し、
前記受光器が、前記第2の複数の光検出器が前記レーザ光を検出したか否かに基づいて受光状態であるか遮光状態であるかを判別するときには、前記フランジの上端を前記材料の前記パンチ金型側の上端として前記第1の距離を算出する
ことを特徴とする請求項2に記載のプレスブレーキの安全装置。 - 前記安全制御部には、前記材料の加工の仕方を示す加工データに基づいて計算された前記フランジの高さを示す値が供給され、
前記安全制御部は、前記フランジの高さに基づいて前記第1の距離を算出する
ことを特徴とする請求項3に記載のプレスブレーキの安全装置。 - 上部テーブルに装着された投光器によって、前記上部テーブルに保持されたパンチ金型と下部テーブルに保持されたダイ金型との間を通過するようにレーザ光を射出し、
前記パンチ金型と前記ダイ金型との間を通過したレーザ光を前記上部テーブルに装着された受光器が備える光検出器が検出するか否かに基づいて、前記受光器が前記レーザ光を受光する受光状態であるか受光しない遮光状態であるかを判別し、
前記上部テーブルを下降及び上昇させるアクチュエータが、前記ダイ金型上に配置された材料を前記パンチ金型と前記ダイ金型とで挟んで曲げ加工するために前記上部テーブルを下降させているとき、前記パンチ金型の前記ダイ金型側の先端と前記材料の前記パンチ金型側の上端との第1の距離が、前記パンチ金型の前記先端と前記光検出器との第2の距離以上である条件を満たす期間においては、前記受光器が遮光状態であると判別したら、前記上部テーブルの下降を停止させるよう前記アクチュエータを制御し、
前記アクチュエータが、前記ダイ金型上に配置された材料を前記パンチ金型と前記ダイ金型とで挟んで曲げ加工するために前記上部テーブルを下降させているとき、前記第1の距離が前記第2の距離未満である条件を満たす期間においては、前記受光器が遮光状態であると判別しても、前記上部テーブルの下降を停止させず下降を継続させるよう前記アクチュエータを制御する
ことを特徴とするプレスブレーキの制御方法。 - 前記受光器は、前記パンチ金型の移動経路に沿って配列された第1の複数の光検出器と、前記第1の複数の光検出器よりも前側に配列された第2の複数の光検出器とを有し、
前記第1及び第2の複数の光検出器それぞれの光検出器が個別に前記レーザ光を検出したか否かに基づいて、受光状態であるか遮光状態であるかを判別する
ことを特徴とする請求項5に記載のプレスブレーキの制御方法。 - 前記材料が平板状の板材の側方に前記パンチ金型側に立ち上がるフランジを有するとき、
前記受光器が、前記第1の複数の光検出器が前記レーザ光を検出したか否かに基づいて受光状態であるか遮光状態であるかを判別するときには、前記板材の上端を前記材料の前記パンチ金型側の上端として前記第1の距離を算出し、
前記受光器が、前記第2の複数の光検出器が前記レーザ光を検出したか否かに基づいて受光状態であるか遮光状態であるかを判別するときには、前記フランジの上端を前記材料の前記パンチ金型側の上端として前記第1の距離を算出する
ことを特徴とする請求項6に記載のプレスブレーキの制御方法。 - 前記材料の加工の仕方を示す加工データに基づいて前記フランジの高さを計算し、
計算された前記フランジの高さに基づいて前記第1の距離を算出する
ことを特徴とする請求項7に記載のプレスブレーキの制御方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201780023747.0A CN109070168B (zh) | 2016-04-14 | 2017-03-14 | 折弯机的安全装置 |
EP17782173.3A EP3444044B1 (en) | 2016-04-14 | 2017-03-14 | Safety device for press brake and control method for press brake |
KR1020187024011A KR101942889B1 (ko) | 2016-04-14 | 2017-03-14 | 프레스 브레이크의 안전 장치 및 프레스 브레이크의 제어 방법 |
US16/093,026 US10369607B2 (en) | 2016-04-14 | 2017-03-14 | Safety device of press brake and controlling method of press brake |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016-080757 | 2016-04-14 | ||
JP2016080757A JP6243954B2 (ja) | 2016-04-14 | 2016-04-14 | プレスブレーキの安全装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017179355A1 true WO2017179355A1 (ja) | 2017-10-19 |
Family
ID=60041696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2017/010085 WO2017179355A1 (ja) | 2016-04-14 | 2017-03-14 | プレスブレーキの安全装置及びプレスブレーキの制御方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US10369607B2 (ja) |
EP (1) | EP3444044B1 (ja) |
JP (1) | JP6243954B2 (ja) |
KR (1) | KR101942889B1 (ja) |
CN (1) | CN109070168B (ja) |
WO (1) | WO2017179355A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111867746A (zh) * | 2018-03-14 | 2020-10-30 | 株式会社天田集团 | 弯板机用光学式安全装置、弯板机以及光学式监视方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4105539A1 (de) * | 2021-06-15 | 2022-12-21 | Fiessler Elektronik GmbH & Co. KG | Umformeinrichtung und verfahren zum betreiben einer umformeinrichtung |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1387121A2 (de) * | 2002-07-31 | 2004-02-04 | Fiessler Elektronik OHG | Schutzeinrichtung für Maschinen, wie Biegepressen, Schneidemaschinen, Stanzmaschinen oder dergleichen |
JP2005296966A (ja) * | 2004-04-07 | 2005-10-27 | Amada Co Ltd | 曲げ加工方法及びその装置 |
JP2006504914A (ja) * | 2002-11-05 | 2006-02-09 | ピルツ ゲーエムベーハー アンド コー.カーゲー | 機械、特にプレスブレーキのための安全装置 |
EP1515078B1 (de) * | 2003-09-13 | 2007-04-25 | Fiessler Elektronik GmbH & Co. KG | Schutzeinrichtung für Maschinen, wie Abkantpressen, Schneidemaschinen, Stanzmaschinen oder dergleichen |
JP2015211984A (ja) * | 2014-05-03 | 2015-11-26 | フィースラー エレクトロニク ゲーエムベーハー ウント コー カーゲー | 成形装置及び成型装置を作動させる方法 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4166369A (en) * | 1978-04-06 | 1979-09-04 | Kabushiki Kaisha Komatsu Seisakusho | Safety device for press brake |
US4660703A (en) * | 1983-11-07 | 1987-04-28 | Nevio Filcich | Method and apparatus for machine safety |
FR2556074B1 (fr) * | 1983-12-06 | 1987-03-06 | Ereis Exploit | Procede et dispositif de protection, au moyen d'un faisceau laser, d'une machine de travail d'une tole |
AU667057B2 (en) * | 1991-10-18 | 1996-03-07 | Thomas John Appleyard | Brake press safety apparatus |
AUPN744696A0 (en) * | 1996-01-05 | 1996-02-01 | Appleyard, Thomas John | Safety apparatus and protection method for machines |
US6660993B2 (en) * | 1999-04-16 | 2003-12-09 | Tirops Safety-Technology Inc. | Safety apparatus and protection method for machines |
DE10027156A1 (de) * | 2000-05-31 | 2001-12-06 | Fiessler Elektronik Ohg | Schutzeinrichtung für Maschinen, wie Abkantpressen, Schneidmaschinen, Stanzmaschinen oder dergleichen |
DE10123562A1 (de) * | 2001-05-15 | 2002-11-21 | Fiessler Elektronik Ohg | Schutzeinrichtung für Maschinen, wie Abkantpressen, Schneidemaschinen, Stanzmaschinen oder dergleichen |
DE10247136A1 (de) * | 2002-10-09 | 2004-04-22 | Sick Ag | Schutzvorrichtung zur Überwachung eines mit einem Bauteil zu bewegenden Schutzbereichs |
JP4544566B2 (ja) * | 2003-01-31 | 2010-09-15 | サンクス株式会社 | 多光軸光電センサ |
DE10309399A1 (de) * | 2003-03-04 | 2004-09-16 | Sick Ag | Sicherungsverfahren und optoelektronischer Sensor |
DE10346918A1 (de) * | 2003-10-09 | 2005-05-04 | Sick Ag | Vorrichtung mit Schutzeinrichtung |
DE102004020024A1 (de) * | 2004-04-23 | 2005-11-10 | Sick Ag | Verfahren zur Sicherung einer Werkzeugmaschine und optoelektronischer Sensor zur Durchführung eines solchen Verfahrens |
DE102004058472B4 (de) * | 2004-11-24 | 2006-12-14 | Pilz Gmbh & Co. Kg | Sicherheitseinrichtung und Verfahren zum Bestimmen eines Nachlaufweges bei einer Maschine |
DE202010004438U1 (de) * | 2010-03-29 | 2011-08-11 | Pilz Gmbh & Co. Kg | Sicherheitseinrichtung für eine Maschine, bei der ein erstes Maschinenteil eine Arbeitsbewegung gegen ein zweites Maschinenteil ausführt |
JP5579877B2 (ja) * | 2011-02-09 | 2014-08-27 | 株式会社アマダ | 曲げ加工機 |
CN103831333A (zh) * | 2012-11-20 | 2014-06-04 | 叶小平 | 一种安全冲床 |
JP6287677B2 (ja) * | 2014-08-08 | 2018-03-07 | オムロン株式会社 | 多光軸光電センサ |
-
2016
- 2016-04-14 JP JP2016080757A patent/JP6243954B2/ja active Active
-
2017
- 2017-03-14 CN CN201780023747.0A patent/CN109070168B/zh active Active
- 2017-03-14 WO PCT/JP2017/010085 patent/WO2017179355A1/ja active Application Filing
- 2017-03-14 KR KR1020187024011A patent/KR101942889B1/ko active IP Right Grant
- 2017-03-14 US US16/093,026 patent/US10369607B2/en active Active
- 2017-03-14 EP EP17782173.3A patent/EP3444044B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1387121A2 (de) * | 2002-07-31 | 2004-02-04 | Fiessler Elektronik OHG | Schutzeinrichtung für Maschinen, wie Biegepressen, Schneidemaschinen, Stanzmaschinen oder dergleichen |
JP2006504914A (ja) * | 2002-11-05 | 2006-02-09 | ピルツ ゲーエムベーハー アンド コー.カーゲー | 機械、特にプレスブレーキのための安全装置 |
EP1515078B1 (de) * | 2003-09-13 | 2007-04-25 | Fiessler Elektronik GmbH & Co. KG | Schutzeinrichtung für Maschinen, wie Abkantpressen, Schneidemaschinen, Stanzmaschinen oder dergleichen |
JP2005296966A (ja) * | 2004-04-07 | 2005-10-27 | Amada Co Ltd | 曲げ加工方法及びその装置 |
JP2015211984A (ja) * | 2014-05-03 | 2015-11-26 | フィースラー エレクトロニク ゲーエムベーハー ウント コー カーゲー | 成形装置及び成型装置を作動させる方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3444044A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111867746A (zh) * | 2018-03-14 | 2020-10-30 | 株式会社天田集团 | 弯板机用光学式安全装置、弯板机以及光学式监视方法 |
US11623267B2 (en) | 2018-03-14 | 2023-04-11 | Amada Co., Ltd. | Optical safety device for press brake, press brake, and optical monitoring method |
Also Published As
Publication number | Publication date |
---|---|
EP3444044A1 (en) | 2019-02-20 |
JP2017189800A (ja) | 2017-10-19 |
CN109070168A (zh) | 2018-12-21 |
JP6243954B2 (ja) | 2017-12-06 |
CN109070168B (zh) | 2019-08-23 |
KR20180099895A (ko) | 2018-09-05 |
US10369607B2 (en) | 2019-08-06 |
KR101942889B1 (ko) | 2019-01-28 |
EP3444044A4 (en) | 2019-12-25 |
EP3444044B1 (en) | 2020-09-02 |
US20190151921A1 (en) | 2019-05-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11267037B2 (en) | Workpiece processing machine and method for operating the workpiece processing machine | |
JP5537027B2 (ja) | 産業機械用の画像化および安全システムならびに方法 | |
JP4740594B2 (ja) | 安全装置 | |
WO2017179355A1 (ja) | プレスブレーキの安全装置及びプレスブレーキの制御方法 | |
JP4511193B2 (ja) | 多重レーザ安全機構 | |
US9862018B2 (en) | Forming apparatus and method of operating a forming apparatus | |
JP5922057B2 (ja) | 成形装置および成形装置の操作方法 | |
KR20150020979A (ko) | 레이저를 이용한 절곡기 방호장치 | |
JP2006061958A (ja) | プレスブレーキ | |
JP2019504768A (ja) | 機械のモニタリング方法およびその方法を用いる安全デバイス | |
US8103373B2 (en) | Control system | |
JP6812184B2 (ja) | プレスブレーキ及びワーク有無判定方法 | |
WO2018163525A1 (ja) | プレスブレーキ | |
JP6572338B1 (ja) | プレスブレーキ用光学式安全装置、プレスブレーキ、及び光学式監視方法 | |
JP2006061959A (ja) | プレスブレーキ | |
JP2020192606A (ja) | 変形加工機 | |
ZA200605725B (en) | A control system | |
US20220395890A1 (en) | Forming press and method for operating a forming press | |
TWI495894B (zh) | 用來檢測工件是否正確置放之檢測裝置及其方法 | |
AU2004296897B2 (en) | A control system | |
JPH09329296A (ja) | プレス機械の安全装置 | |
JP2018130747A (ja) | プレス機械用の位置速度検出装置及びプレス機械 | |
JP2020052027A (ja) | 光学検出設備 | |
RU2386507C2 (ru) | Система управления | |
JP2006116574A (ja) | 曲げ加工方法及びその装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 20187024011 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020187024011 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2017782173 Country of ref document: EP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 17782173 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2017782173 Country of ref document: EP Effective date: 20181114 |