JP2019072747A - Laser beam machine and noise warning method therefor - Google Patents

Abstract

To improve a work environment of an operator by sufficiently preventing the operator from being unexpectedly exposed to large noise.SOLUTION: A determination unit 60 determines that there is noise of a prescribed noise level or more after forming a small-diameter hole Hs when a thickness of a work W is equal to a prescribed thickness or more which has the possibility of generating noise of a prescribed noise level or more, a gas pressure of assist gas is equal to a prescribed gas pressure or more which has the possibility of generating noise of the prescribed noise level or more, and a diameter of a piercing hole Hp or the small-diameter hole Hs falls within a prescribed range of diameters which has the possibility of generating noise of the prescribed noise level or more, on condition that a prescribed injection time of the assist gas injected toward the piercing hole Hp or the small-diameter hole Hs side exceeds a prescribed allowable time after forming the piercing hole Hp or the small-diameter hole Hs. A notification unit 62 provides a notification on a result of the determination before executing piercing processing when it is determined that there is noise of the prescribed noise level or more after forming the piercing hole Hp or the small-diameter hole Hs.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a noise before performing a piercing process by a laser processing machine which performs a piercing process to a remaining material portion of a work before performing a product processing to the outline of a product portion inside a plate-like work and a piercing process by a laser processing machine The present invention relates to a noise warning method for a laser processing machine that warns in advance.

  As shown in FIGS. 1 (a) and 1 (b), when a product portion (portion to be a product) Wm is provided inside a plate-like workpiece (metal plate) W, the product of the workpiece W is usually produced by a laser processing machine Before performing product processing (product cutting) on the contour of the part Wm, piercing processing and approach processing (cutting processing) are sequentially performed on the remaining material part (part to be the remaining material) Wb of the work W. Here, in addition to the processing for forming the piercing hole Hp in the vicinity of the contour of the product portion Wm in the work W, the piercing processing includes forming the piercing hole Hp and then enclosing it around the piercing hole Hp ) Processing to form a small diameter hole Hs of, for example, 3 mm to 5 mm in diameter. The approach process (cutting process) refers to a process for forming a slit (cutting) S communicating from the piercing hole Hp or the small diameter hole Hs to the contour of the product portion Wm of the work W. The small diameter hole Hs may not be formed around the pierced hole Hp as long as the pierced hole Hp is included.

  As a prior art related to the present invention, there is one shown in Patent Document 1.

Unexamined-Japanese-Patent No. 3-165979

  By the way, when the piercing hole Hp or the small diameter hole Hs is formed in the remaining material portion Wb of the work W by performing the piercing process by the laser processing machine, at the same time, the assist gas ejected from the laser processing head in the laser processing machine pierces Pass through the hole Hp or the small diameter hole Hs. Then, as described in Patent Document 1, there may be a sudden frequency change of the drilling sound in the nozzle of the laser processing head. Furthermore, the assist gas is compressed once and expands, and in some cases, loud noise may occur instantaneously. As a result, there is a problem that the worker is exposed to loud noise unexpectedly, giving rise to a case where the worker is greatly surprised, and the working environment of the worker is impaired.

  Then, an object of this invention is to provide the laser processing machine of the novel structure which can solve the above-mentioned problem, and the noise warning method.

  According to a first aspect of the present invention, before performing product processing (product cutting) of a plate-like work (metal plate), a pierced hole or a small diameter hole containing (surrounding) the pierced hole is formed in the vicinity of the product portion Laser processing machine for performing piercing processing to generate noise above a predetermined noise level after formation (immediately after formation) of the piercing hole or the small diameter hole based on the thickness of the work and / or the processing conditions of the piercing processing If it is determined that there is noise above a predetermined noise level after (or immediately after) formation of the piercing hole or the small diameter hole, the determination result is determined before performing piercing processing. And a notification unit for giving notification.

  According to the first aspect of the present invention, the determination unit generates noise at a predetermined noise level or more after formation of the piercing hole or the small-diameter hole, based on the thickness of the work and / or the processing condition of piercing processing. Determine the presence or absence. Then, when it is determined that there is noise above the predetermined noise level after the formation of the pierced hole or the small diameter hole, the notification unit notifies the determination result before performing the piercing process. Thus, the operator can be warned in advance of noise before piercing.

  According to the second aspect of the present invention, before performing piercing processing by a laser processing machine for forming a piercing hole or a small diameter hole containing (surrounding) the piercing hole in the vicinity of the contour of the product portion in the residual material portion of the work In the noise warning method of the laser processing machine which warns in advance about noise, predetermined noise after formation (immediately after formation) of the piercing hole or the small diameter hole based on the thickness of the work and / or the processing condition of piercing processing. Before performing piercing if it is determined that there is noise above a predetermined noise level after formation (immediately after) formation of the piercing hole or the small diameter hole (determination step of determining the presence or absence of noise generation above the level) , And an informing step of informing the determination result.

  According to the second aspect of the present invention, as described above, noise generation above a predetermined noise level after the formation of the pierced hole or the small diameter hole is made based on the thickness of the work and / or the processing conditions of the piercing process. Determine the presence or absence. Then, when it is determined that there is noise above the predetermined noise level after the formation of the piercing hole or the small diameter hole, the determination result is notified before the piercing processing is performed. Thus, the operator can be warned in advance of noise before piercing.

  According to the present invention, it is possible to sufficiently prevent the worker from being unexpectedly exposed to loud noise, and to improve the working environment of the worker.

Fig.1 (a) is a figure which shows the workpiece | work which has a product part inside, and FIG.1 (b) is an enlarged view of the arrow B in FIG. 1 (a). FIG. 2 is a side view of a complex processing machine according to an embodiment (another embodiment) of the present invention. FIG. 3 is a control block diagram of the multi-tasking machine according to the embodiment of the present invention. FIG. 4A is a graph showing the result of the first noise test performed while changing the thickness of the workpiece as a parameter. FIG. 4B is a graph showing the result of the second noise test performed while changing the gas pressure of the assist gas as a parameter. FIG.4 (c) is a graph which shows the result of the 3rd noise test done changing the diameter of a small diameter hole as a parameter. FIG. 5 is a flow chart for explaining the operation of the embodiment of the present invention. FIG. 6 is a control block diagram of a complex processing machine according to another embodiment of the present invention. FIG. 7 is a determination table showing the relationship between the thickness of the work, the pressure of the assist gas, the diameter of the pierced hole or small diameter hole, and the presence or absence of noise generation above the predetermined noise level after formation of the pierced hole or small diameter hole FIG. FIG. 8 is a flow chart for explaining the operation of another embodiment of the present invention.

  Embodiments of the present invention and other embodiments will be described with reference to the drawings.

  In the specification and claims of the present application, "provided" includes not only directly provided but also indirectly provided via another member. The “X-axis direction” is one in the horizontal direction, and in the embodiment of the present invention, the horizontal direction in the horizontal direction. The “Y-axis direction” is one in the horizontal direction orthogonal to the X-axis direction, and in the embodiment of the present invention, is the horizontal front-rear direction. "And / or" is intended to include either one or both of the two. In the drawings, “FF” is forward, “FR” is backward, “L” is left, “R” is right, “U” is upward, and “D” is It points down respectively.

(Embodiment of the present invention)
As shown in FIG. 1 and FIG. 2, the compound processing machine 10 according to the embodiment of the present invention performs punching (including punching and forming) and laser processing (products) on a plate-like work (sheet metal) W. Complex type processing machine that includes processing, piercing processing, and approach processing). In addition, compound processing machine 10, before product processing (product cutting) to the contour of the product part (part which becomes the product) which has inside the work W which has been punch processed (product cutting), remaining material part of the work W Parts to be Used) One of the laser processing machines that perform piercing and approach processing (cutting) on Wb. Here, as described above, the piercing process by the combined processing machine 10 as a laser processing machine is internally included around the piercing hole Hp or the piercing hole Hp in the vicinity of the contour of the product portion Wm in the remaining material portion Wb of the work W For example, a small diameter hole Hs having a diameter of 3 mm to 5 mm is formed. A slit (notch) S communicating from the pierced hole Hp or the small diameter hole Hs to the product portion Wm of the work W is formed by approach processing (notch processing) by the combined processing machine 10 as a laser processing machine.

  The multi-task processing machine 10 includes a bridge-type main body frame 12, and the main body frame 12 has an upper frame 14 and a lower frame 16 opposed to each other in the vertical direction. Between the upper frame 14 and the lower frame 16, a processing space MS for performing punching and laser processing on the work W is formed. The lower frame 16 is provided with a processing table 18 for supporting the workpiece W.

  The processing table 18 is provided with a work moving unit 20 for moving the work W in the X-axis direction (left-right direction) and the Y-axis direction (front-back direction). The work moving unit 20 is provided on a carriage base 22 which extends in the X axis direction and can move in the Y axis direction, a carriage 24 provided on the carriage base 22 so as to be movable in the X axis direction, A plurality of (only one shown) clampers 26 for clamping (clamping) the end of the workpiece W are provided.

  The body frame 12 is provided with a punching unit 28 for punching the product portion Wm of the workpiece W. The punching unit 28 is rotatably provided on the upper frame 14 and holds the plurality of punch dies 30, and rotatably provided on the lower frame 16 and holds the plurality of die dies 34. And a lower turret 36. The punch processing unit 28 has a ram 38 provided on the upper frame 14 so as to be able to move up and down, and a striker 40 that is provided on the ram 38 and presses the punch die 30 indexed to the punch processing position PP. ing.

The upper frame 14 is provided with a laser processing unit 42 for performing laser processing on the workpiece W. The laser processing unit 42 is a slider 44 provided on the upper frame 14 so as to be movable in the Y-axis direction, and a laser processing provided on the slider 44 and emitting laser light while spraying assist gas toward the work W And a head 46. The laser processing head 46 has a nozzle 48 on the tip side, and the center position of the nozzle 48 of the laser processing head 46 is the irradiation position BP of the laser processing head 46. Here, the laser processing head 46 is connected to a gas supply source 50 that supplies an assist gas, and the pressure of the assist gas can be adjusted. The laser processing head 46 is optically connected to a fiber laser oscillator 52 as a laser oscillator that oscillates a laser beam, and the output of the laser beam can be adjusted. In place of the fiber laser oscillator 52, a YAG laser oscillator (not shown), a CO ₂ laser oscillator (not shown), a semiconductor laser oscillator (not shown) or the like may be used.

  With the above-described configuration, the work W is punched by moving the carriage 24 in the X-axis direction and moving the carriage base 22 in the Y-axis direction while holding the end of the work W by a plurality of clampers 26. Move and position (position) the PP. The punch processing unit 28 can perform punch processing on the product portion Wm of the work W.

  Thereafter, the carriage 24 is moved in the X-axis direction and the slider 44 is moved in the Y-axis direction in a state in which the end of the work W is gripped by the plurality of clampers 26. Movement positioning (positioning) relative to BP. Then, while positioning the irradiation position BP of the laser processing head 46 relative to the work W, the nozzle 48 of the laser processing head 46 jets the assist gas toward the work W while irradiating the laser light. Thereby, the workpiece W can be subjected to laser processing such as piercing processing and product processing. The details of piercing and the like will be described later.

  As shown in FIG. 2 and FIG. 3, the multi-function machine 10 controls the operations of the work moving unit 20, the punching unit 28, the laser processing unit 42, the gas supply source, etc. based on the processing program. Equipped with Further, the control device 54 is configured by one or more computers, and the control device 54 includes a memory for storing a processing program etc., and a CPU (Central Processing Unit) for interpreting and executing the processing program. ing. The control device 54 has an input unit 56 for inputting work information, product information, processing conditions for laser processing (processing conditions for piercing processing, processing conditions for approach processing, processing conditions for product processing), etc. 56 consists of a keyboard, a mouse, etc. The control device 54 has a display 58 for displaying work information, product information and the like. Here, the workpiece information includes each dimension such as the thickness of the workpiece W, material and the like, and the product information includes the shape of the product, each dimension and the like.

  The CPU of the control device 54 has a function as the determination unit 60, and the display 58 has a function as the notification unit 62. The specific contents of the determination unit 60 and the notification unit 62 are as follows.

  Based on the input thickness of the workpiece W and the processing conditions for piercing, the determining unit 60 determines whether or not noise generation above a predetermined noise level occurs (immediately after formation) of the piercing holes Hp or the small diameter holes Hs. . More specifically, when the determination unit 60 satisfies the first to third noise requirements, it is determined that noise is equal to or higher than a predetermined noise level after formation (immediately after formation) of the piercing hole Hp or the small diameter hole Hs. Do. The predetermined noise level refers to the level of noise that the operator feels uncomfortable according to the work environment, and the predetermined noise level is set to, for example, 85 dB (decibel), and the worker changes as appropriate. It is possible. The first noise requirement is that the thickness of the work W is equal to or more than a predetermined thickness that may generate noise of a predetermined noise level or more. The second noise requirement is that the gas pressure of the assist gas is equal to or higher than a predetermined gas pressure that may generate noise equal to or higher than a predetermined noise level. The third noise requirement is that the diameter of the small diameter hole Hs is within the range of a predetermined diameter that may generate noise above a predetermined noise level.

  Here, the predetermined thickness in the first noise requirement is set based on the result of the first noise test (refer to FIG. 4A) performed while changing the thickness of the work W as a parameter, for example, 3 It is set to .0 mm or more. The first noise test was performed by injecting an assist gas with a gas pressure of 0.5 MPa toward the small-diameter hole Hs having a diameter of 5.1 mm in the work W. When the same noise test is performed while changing the diameter of the small diameter hole Hs and the gas pressure of the assist gas, a predetermined thickness which may generate noise is set for each of the changed conditions. It will be.

  Further, the predetermined gas pressure in the second noise requirement is set based on the result of the second noise test (see FIG. 4B) performed while changing the gas pressure of the assist gas as a parameter, for example, It is set to 0.8 MPa or more. The second noise test was performed by injecting the assist gas toward the small diameter hole Hs side of the diameter 5.1 mm in the work W with a thickness 9 mm. When the same noise test is performed while changing the thickness of the workpiece W and the diameter of the small diameter hole Hs, predetermined gas pressures which may generate noise are set for each of the changed conditions. It will be.

  Furthermore, the range of the predetermined diameter in the third noise requirement is set based on the result of the third noise test (refer to FIG. 4C) performed while changing the diameter of the small diameter hole Hs as a parameter. For example, it is set to 3.0 mm to 5.0 mm. The third noise test was performed by injecting an assist gas with a gas pressure of 0.5 MPa toward the small diameter hole Hs side in a workpiece W with a thickness of 9 mm. When the same noise test is performed while changing the thickness of the workpiece W and the gas pressure of the assist gas, set a predetermined diameter that may generate noise for each of the changed conditions. become.

  In the case where at least one noise condition is satisfied instead of the case where the first to third noise requirements are satisfied, the determination unit 60 is a noise above a predetermined noise level after the formation of the piercing hole Hp or the small diameter hole Hs. It may be determined that there is. For example, based on the result of the first noise test performed by injecting the assist gas toward the piercing hole Hp side while changing the thickness of the work W, a predetermined thickness in the first noise requirement is set, It may be determined that the noise is equal to or higher than a predetermined noise level after the formation of the piercing hole Hp or the small diameter hole Hs only when the thickness of the above is exceeded. Further, based on the result of the second noise test performed by injecting the assist gas toward the piercing hole Hp side performed while changing the gas pressure of the assist gas, the predetermined gas pressure in the second noise requirement is It may be determined that there is noise above a predetermined noise level after the formation of the piercing holes Hp or the small diameter holes Hs only when the gas pressure is set and the pressure exceeds a predetermined gas pressure. Also, based on the result of the third noise test performed by injecting the assist gas toward the pierced hole Hp side while changing the diameter of the pierced hole Hp, the range of the predetermined diameter in the third noise requirement is set. Alternatively, it may be determined that noise is equal to or higher than a predetermined noise level after the formation of the piercing hole Hp or the small diameter hole Hs only in the range of the predetermined diameter.

  Alternatively, when any two of the first to third noise requirements are satisfied, it may be determined that there is noise above a predetermined noise level.

  If the notification unit 62 determines that there is noise above the predetermined noise level after (or immediately after) the formation of the piercing holes Hp or the small diameter holes Hs, for example, “piercing processing is performed before the piercing processing is performed. It is informed by the display such as In addition, the notification unit 62 ends the notification process after the piercing process is finished (immediately after the end).

  Note that, instead of the display 58, a display lamp (not shown) or a speaker (not shown) provided in the vicinity of the main body frame 12 may have a function as the notification unit 62. If it is determined that there is noise above the predetermined noise level after the formation of the piercing hole Hp or the small diameter hole Hs, the indicator light as the notification unit 62 lights up or blinks the determination result before performing the piercing process. The notification is given by display, and the speaker as the notification unit 62 reports the determination result by voice.

  Subsequently, with reference to FIG. 5 and the like, the operation of the embodiment of the present invention will be described including the noise warning method of the laser processing machine according to the embodiment of the present invention. Here, the noise warning method of the laser processing machine according to the embodiment of the present invention is a method of warning in advance about noise before performing piercing processing by the combined processing machine 10 as the laser processing machine, and a determination step; And an informing step.

  As described above, after punching the product portion Wm of the workpiece W, the determination unit 60 determines whether the thickness of the workpiece W is equal to or greater than a predetermined thickness that may cause noise of a predetermined noise level or more. It is determined whether or not it is (step S101 in FIG. 5). That is, the determination unit 60 does not exceed the set value (set value) based on the thickness of the workpiece W to be laser-processed and other processing conditions, and the result of the first noise test (see FIG. 4A). Make a judgment with you. When the thickness of the work W is less than the predetermined thickness (No in step S101 in FIG. 5), the determination unit 60 determines that the noise level is not less than the predetermined noise level after the formation of the piercing hole Hp or the small diameter hole Hs. It is determined that there is no noise (step S102 in FIG. 5, determination step). That is, as in step S101 in FIG. 5, the determination unit 60 sets values based on the thickness of the workpiece W to be laser-processed and other processing conditions, and the result of the second noise test (see FIG. 4B). It is judged whether it exceeds or not.

  When the thickness of the work W is equal to or greater than the predetermined thickness (in the case of Yes in step S101 in FIG. 5), the determination unit 60 determines that the gas pressure of the assist gas is equal to or higher than the predetermined noise level in the thickness of the work W It is determined whether the pressure is equal to or higher than a predetermined gas pressure which may cause the (step S103 in FIG. 5). That is, as in step S101 and step S102 in FIG. 5, the determination unit 60 determines the thickness of the workpiece W to be laser-processed and other processing conditions, and the result of the third noise test (see FIG. 4C). It judges based on whether it is within the setting range based on. Then, when the gas pressure of the assist gas is less than the predetermined gas pressure (in the case of No in step S103 in FIG. 5), the determination unit 60 determines the predetermined noise level after forming the piercing hole Hp or the small diameter hole Hs. It is determined that there is no noise (step S102 in FIG. 5, determination step).

  When the gas pressure of the assist gas is equal to or higher than the predetermined gas pressure (in the case of Yes in step S103 in FIG. 5), the determination unit 60 determines the piercing hole Hp or the small diameter It is determined whether or not the diameter of the hole Hs is within the range of a predetermined diameter which may generate noise of a predetermined noise level or more (step S104 in FIG. 5). Then, when the diameter of the piercing hole Hp or the small diameter hole Hs is not within the range of the predetermined diameter (in the case of No in step S104 in FIG. 5), the determination unit 60 determines after forming the piercing hole Hp or the small diameter hole Hs. It is determined that there is no noise above a predetermined noise level (step S102 in FIG. 5, determination step).

  If the diameter of the pierced hole Hp or the small diameter hole Hs is within the range of the predetermined diameter (in the case of Yes in step S104 in FIG. 5), the determination unit 60 performs the predetermined after forming the pierced hole Hp or the small diameter hole Hs. It is determined that there is noise above the noise level (step S105 in FIG. 5, determination step). Then, before the piercing process is performed, the display 58 as the notifying unit 62 notifies the determination result by, for example, a display such as "with noise in the piercing process" (step S106 in FIG. 5, notification step). Thus, the operator can be warned in advance of the noise before the piercing process is performed by the combined processing machine 10 as the laser processing machine. Note that, instead of the display 58 as the notification unit 62 notifying the determination result, as described above, the indicator light or the speaker as the notification unit 62 may notify the determination result.

  After it is determined that there is no noise above the predetermined noise level after the formation of the piercing hole Hp or the small diameter hole Hs, or after the determination result is notified, piercing is performed by the compound processing machine 10 as a laser processing machine (FIG. 5) Step S107). And piercing processing is specifically performed as follows.

  The irradiation position BP of the laser processing head 46 is positioned relative to the workpiece W in the vicinity of the contour of the product portion Wm in the remaining material portion Wb of the workpiece W. Then, while the assist gas is jetted from the nozzle 48 of the laser processing head 46 toward the remaining material portion Wb of the work W, the laser light is irradiated. Thereby, a pierced hole Hp of about 0.1 mm in diameter is formed.

  After the ass hole Hp is formed, the irradiation position BP of the laser processing head 46 is a work in a state where the laser beam is irradiated while the assist gas is jetted from the nozzle 48 of the laser processing head 46 toward the remaining material portion Wb of the work W Move slightly relative to W. Then, the irradiation position BP of the laser processing head 46 is moved (circular movement) relative to the work W so as to draw a circle having a diameter of, for example, 3 mm to 5 mm with the piercing hole Hp as a center. As a result, a small diameter hole Hs of, for example, 3 mm to 5 mm in diameter is formed to be contained (enclosed) around the piercing hole Hp.

  After forming the small diameter hole Hs, the irradiation of the laser beam from the nozzle 48 of the laser processing head 46 is temporarily stopped. Next, with the assist gas injected from the nozzle 48 of the laser processing head 46 toward the small diameter hole Hs side, the irradiation position BP (center position of the nozzle 48) of the laser processing head 46 is relative to the work W The position is moved slightly to coincide with the center position of the small diameter hole Hs. Then, the injection of the assist gas is stopped after a predetermined injection time, and the piercing processing by the multi-task processing machine 10 as a laser processing machine is ended.

  The notification unit 62 ends the notification processing after the end of the piercing process (step S108 in FIG. 5). Note that the notification process may end in the middle of the piercing process.

  After piercing processing is performed, approach processing is performed by the combined processing machine 10 as a laser processing machine (step S109 in FIG. 5), and the remaining material portion Wb in the work W is communicated from the small diameter hole Hs to the product portion Wm of the work W A slit (cut) S is formed. Then, the product processing (product cutting) is performed by the combined processing machine 10 as a laser processing machine (step S110 in FIG. 5), the outline of the product portion Wm in the work W is laser cut, and the product W (not shown) Take out.

  Among the processes performed by the determination unit 60, the process of step S103 and the process of step S104 in FIG. 5 may be omitted. In other words, when the thickness of the work W is equal to or more than the predetermined thickness (in the case of Yes in step S101 in FIG. 5), noise having a predetermined noise level or more after formation of the piercing hole Hp or the small diameter hole Hs You may judge.

  Further, among the processes performed by the determination unit 60, the process of step S101 and the process of step S104 in FIG. 5 may be omitted. In other words, when the gas pressure of the assist gas is equal to or higher than the predetermined gas pressure (in the case of Yes in step S103 in FIG. 5), noise equal to or higher than the predetermined noise level after forming the piercing hole Hp or the small diameter hole Hs. It may be determined that there is.

  Furthermore, among the processes performed by the determination unit 60, the process of step S101 and the process of step S103 in FIG. 5 may be omitted. In other words, if the diameter of the piercing hole Hp or the small diameter hole Hs is within the range of the predetermined diameter (in the case of Yes in step S104 in FIG. 5), the predetermined diameter after forming the piercing hole Hp or the small diameter hole Hs. It may be determined that there is noise above the noise level.

  Alternatively, the process of any one of the process of step S101, the process of step S103, and the process of step S104 in FIG. 5 may be omitted. In other words, when the thickness of the work W is a predetermined thickness or more, the gas pressure of the assist gas is a predetermined gas pressure or more, and the diameter of the piercing hole Hp or the small diameter hole Hs satisfies any two of the predetermined diameter ranges. It may be determined that there is noise above a predetermined noise level after the formation of the piercing holes Hp or the small diameter holes Hs.

  As described above, according to the embodiment of the present invention, the operator can be warned in advance of noise before piercing is performed by the combined processing machine 10 as a laser processing machine. Therefore, according to the embodiment of the present invention, it is possible to sufficiently prevent the worker from being unexpectedly exposed to a large noise, and to improve the working environment of the worker.

(Other embodiments of the present invention)
Another embodiment of the present invention will be described with reference to FIGS. 1 and 6 to 8.

  As shown in FIG. 2, a combined processing machine (laser processing machine) 10A according to another embodiment of the present invention has the same configuration as the combined processing machine 10 according to the embodiment of the present invention, and combined processing Of the configuration and the like of the machine 10A, only differences from the configuration and the like of the complex processing machine 10 will be described. Among components of the multi-task processing machine 10A, components corresponding to those of the multi-task processing machine 10 are denoted by the same reference numerals in the drawings.

  As shown in FIG. 6, in the multi-tasking machine 10A, the memory of the control device 54 has a function as a table storage unit 64, and the CPU of the control device 54 has a function as a determination unit 66. ing. The specific contents of the table storage unit 64 and the determination unit 66 are as follows.

  As shown in FIGS. 6 and 7, the table storage unit 64 has the thickness of the work W (see FIG. 1A), the pressure of the assist gas, and the diameter of the piercing hole Hp or the small diameter hole Hs (FIG. ) And a determination table showing the relationship between the presence or absence of noise generation above a predetermined noise level after formation of the piercing holes Hp or the small diameter holes Hs. The determination unit 66 refers to the determination table based on the input processing conditions of piercing such as the thickness of the workpiece W and the pressure of the assist gas, and a predetermined noise level after formation of the piercing holes Hp or the small diameter holes Hs. It judges about the existence of the above noise generation.

  Specifically, for example, when the thickness of the work W: 2 mm, the gas pressure of the assist gas: 0.1 MPa, the piercing hole Hp or the diameter of the small diameter hole Hs: 3 mm, the determining unit 66 determines Referring to (data on the second line in FIG. 7), it is determined that there is no noise above a predetermined noise level after the formation of the piercing holes Hp or the small diameter holes Hs. Further, for example, when the thickness of the work W: 3 mm, the gas pressure of the assist gas: 0.2 MPa, the diameter of the piercing hole Hp or the diameter of the small diameter hole Hs: 4 mm, the judging unit 66 It is determined that there is noise above a predetermined noise level after the formation of the piercing hole Hp or the small diameter hole Hs, with reference to the 15th line of Furthermore, for example, when the thickness of the work W: 16 mm, the gas pressure of the assist gas: 1.2 MPa, the diameter of the piercing hole Hp or the diameter of the small diameter hole Hs: 0.1 mm, the judging unit 66 With reference to the sixth row of data from the bottom of FIG. 7, it is determined that there is noise above a predetermined noise level after the formation of the piercing holes Hp or the small diameter holes Hs.

  The table storage unit 64 may store a plurality of determination tables which are different for each material of the work W. In this case, the determination unit 66 refers to the determination table corresponding to the material of the work W, and determines the presence or absence of noise generation above the predetermined noise level after the formation of the piercing hole Hp or the small diameter hole Hs.

  Subsequently, the operation of another embodiment of the present invention will be described with reference to FIG.

  As described above, after punching the product portion Wm (see FIG. 1A) of the workpiece W, the determination unit 66 refers to the determination table based on the thickness of the workpiece W and the processing conditions for piercing. Then, it is determined whether or not noise is generated above a predetermined noise level after the formation of the piercing holes Hp or the small diameter holes Hs (step S201 in FIG. 8). Then, if it is determined that there is noise above the predetermined noise level after the formation of the piercing hole Hp or the small diameter hole Hs (in the case of Yes in step S201 in FIG. 8), the processing of steps S202 to S206 in FIG. Run. If it is determined that there is no noise above the predetermined noise level after the formation of the pierced hole Hp or the small diameter hole Hs (No in step S201 in FIG. 8), the processing from step S203 to step S206 in FIG. . Note that the processing from step S202 to step S206 in FIG. 8 is the same processing as the processing from step S106 to step S110 in FIG.

  Therefore, according to another embodiment of the present invention, the same effect as the above-described embodiment of the present invention can be obtained.

  The present invention is not limited to the description of the above embodiment, and can be implemented in various aspects as follows, for example.

  That is, if it is determined that the noise above the predetermined noise level is present after the formation of the small diameter hole Hs, the gas pressure of the assist gas becomes less than the predetermined gas pressure in the first noise requirement or the assist gas is predetermined. The processing condition of the piercing process may be automatically changed by the controller 54 so that the injection time is within the predetermined allowable time.

  Although the control device 54 determines whether or not noise generation above a predetermined noise level occurs before laser processing after the end of punch processing, the automatic programming device for creating processing programs for punch processing and laser processing has the determination function. A determination unit may be provided. In this case, a warning can be issued by the instruction of the processing program by creating a determination process (a determination process of the presence or absence of the need for warning) about the presence or absence of noise generation above the predetermined noise level in the processing program. it can.

  And the scope of rights included in the present invention is not limited to the embodiment described above.

10 Combined processing machine (laser processing machine)
12 main frame 14 upper frame 16 lower frame 18 processing table 20 work moving unit 28 punching processing unit 42 laser processing unit 44 slider 46 laser processing head 48 nozzle 50 gas supply source 52 fiber laser oscillator 54 control unit 56 input section 58 display 60 judgment Unit 62 Notification unit 10A Combined processing machine (laser processing machine)
64 table storage unit 66 judgment unit W work Wm product part Wb residual material part Hp pierced hole Hs small diameter hole S slit (notched)

Claims (4)

In a laser processing machine which performs piercing processing for forming a piercing hole or a small diameter hole including the piercing hole in the vicinity of a product portion before processing a plate-like work product,
A determination unit that determines the presence or absence of noise generation above a predetermined noise level after the formation of the piercing hole or the small diameter hole based on the thickness of the work and / or the processing conditions of piercing processing;
And a notification unit for notifying of the determination result before the piercing process is performed when it is determined that there is noise above the predetermined noise level after the formation of the piercing hole or the small diameter hole. Laser processing machine.   When the thickness of the work is equal to or greater than a thickness that may generate noise above a predetermined noise level, the determination unit may be a gas that may generate noise at a gas pressure of the assist gas above the predetermined noise level. If at least one of the piercing holes or the small-diameter holes is within the range of diameters that may generate noise of a predetermined noise level or more, the piercing holes or the piercing holes The laser processing machine according to claim 1, wherein it is determined that noise of a predetermined noise level or more is present after the formation of the small diameter hole. The table storage unit stores a determination table indicating the relationship between the thickness of the work, the processing conditions for piercing, and the presence or absence of noise generation above the predetermined noise level after the formation of the pierced hole or the small diameter hole,
The determination unit refers to the determination table based on the thickness of the workpiece and the processing conditions for piercing, and determines whether or not noise generation above a predetermined noise level after formation of the piercing hole or the small diameter hole is made. The laser processing machine according to claim 1, characterized in that: This laser processing machine warns in advance of noise before performing piercing processing by a laser processing machine for forming a piercing hole or a small diameter hole including the piercing hole in the vicinity of the contour of a product portion in a residual material portion of a work In the noise warning method,
A determination step of determining the presence or absence of noise generation above a predetermined noise level after formation of the piercing hole or the small diameter hole based on the thickness of the work and / or the processing condition of piercing processing;
And a notification step of notifying the determination result before the piercing is performed when it is determined that noise is equal to or higher than a predetermined noise level after the formation of the piercing hole or the small diameter hole. Noise warning method for laser processing machines.

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