Laser processing device with protective structure

Abstract

The utility model relates to laser processing device field especially, relate to a kind of laser processing device with protection structure.It includes: laser transmitter, the export side of laser transmitter is equipped with motor, motor drive connection has optical gate, the middle part of optical gate is equipped with the through-hole for laser to pass through, further include control circuit board and several sensing units, the output end of each sensing unit is electrically connected with control circuit board, sensing unit is correspondingly set in the detection place of laser processing device;When detection place detects illegal operation, corresponding sensing unit sends first signal to control circuit board, control circuit board receives first signal and sends control signal to motor, motor drives optical gate to rotate, and optical gate blocks laser;When very operation is removed, sensing unit sends second signal to control circuit board, control circuit board receives second signal and sends control signal to motor, motor drives optical gate reverse rotation, and laser passes through the through-hole of optical gate.

Description

Technical Field

[0001] This utility model relates to the field of laser processing equipment, and in particular to a laser processing equipment with a protective structure. Background Technology

[0002] Most small and medium-sized laser processing devices currently have built-in processing space and a enclosure to isolate the processing space from the outside world. To prevent the enclosure from being illegally opened, sensors are connected to it. When the enclosure is opened for some reason, the sensor sends a signal to the control system of the laser processing device, which then controls the laser emitter to stop working or shuts down the entire machine. When the enclosure is closed, the control system controls the laser emitter to continue working or restarts the power. Although this control method protects the operator's safety, it is harmful to the laser emitter, as frequent start-stop cycles accelerate its aging. Therefore, a protective structure needs to be designed so that the laser emitter can still continue to work when the laser processing device is illegally opened or disassembled, but the laser will not leak out. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a laser processing device with a protective structure. When the laser processing device is subjected to illegal operation, the protective structure will be triggered to block laser leakage, thus protecting the operator and preventing the laser emitter from suddenly starting or stopping.

[0004] A laser processing apparatus with a protective structure, comprising:

[0005] The laser emitter has a motor on its outlet side, which drives an optical shutter. The optical shutter has a through-hole in the middle for the laser to pass through.

[0006] It also includes a control circuit board and several sensing units. The output of each sensing unit is electrically connected to the control circuit board. The sensing units are correspondingly set at the detection point of the laser processing device. When the detection point detects an illegal operation, the corresponding sensing unit sends a first signal to the control circuit board. After receiving the first signal, the control circuit board sends a control signal to the motor. The motor drives the shutter to rotate, and the shutter blocks the laser. When the illegal operation is cleared, the sensing unit sends a second signal to the control circuit board. After receiving the second signal, the control circuit board sends a control signal to the motor. The motor drives the shutter to rotate in the opposite direction, and the laser passes through the through hole of the shutter.

[0007] Furthermore, the sensing unit includes a proximity switch assembly, a touch sensor, or a displacement sensor.

[0008] Furthermore, the laser emitter's outlet end is connected to a support frame, the support frame including a base plate fixed to the laser emitter, a support plate connected to the base plate, the base plate having laser clearance holes, the motor being fixed to the support plate, and the motor's shaft extending out of the support plate and connected to the optical shutter.

[0009] Furthermore, a sensing plate is connected to one side of the light shutter, and a sensor is connected to the support plate. When the light shutter rotates to a predetermined angle, the sensing plate approaches or abuts the sensor. The sensor senses the sensing plate and sends a signal to the control circuit board. The control circuit board controls the motor to stop rotating, and the light shutter blocks the laser.

[0010] Furthermore, the support frame is connected to a protective shell for shielding the light shutter, and a light-emitting hole is provided on one side of the protective shell.

[0011] Furthermore, the control circuit board is provided with a signal input detection circuit connected to the sensing unit. The signal input detection circuit includes a signal input interface connected to the sensing unit. The positive terminal of the signal input interface is connected to a signal input terminal through a series resistor. The intermediate potential point of the series resistor is connected to the power supply terminal through an intermediate resistor.

[0012] Preferably, the signal input terminal is grounded through a grounding capacitor.

[0013] Furthermore, the intermediate potential point is grounded through a reverse-connected TVS diode.

[0014] Furthermore, the control circuit board is equipped with a motor control circuit for controlling the forward and reverse rotation of the motor.

[0015] Furthermore, the detection area is equipped with two sensing units.

[0016] Preferably, the two sensing units at the detection point are connected to the control circuit board via a logic circuit. The logic circuit includes a NAND gate circuit, the two input terminals of which are respectively connected to the output terminals of the two sensing units, and the output terminal of the NAND gate circuit is connected to the control circuit board.

[0017] The beneficial effects of this utility model are as follows: By setting up an optical shutter to block the laser, this utility model can prevent the laser emitter from repeatedly starting and stopping in a short period of time, which helps to extend its service life and also protects the operator. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the laser processing equipment in this embodiment.

[0019] Figure 2 This is a schematic diagram of the laser emitter and optical shutter working together in this embodiment.

[0020] Figure 3 for Figure 2A schematic diagram of a structure with an added protective shell.

[0021] Figure 4 for Figure 2 Another perspective structural diagram.

[0022] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0023] Figure 6 This is a schematic diagram illustrating the principle of protective structure control in this embodiment.

[0024] Figure 7 This is a schematic diagram of signal coupling in a sensing unit.

[0025] Figure 8 This is a schematic diagram of the signal input detection circuit.

[0026] Figure 9 This is a schematic diagram of the control chip circuit in this embodiment.

[0027] Figure label:

[0028] 1—Laser emitter; 2—Motor; 3—Optical shutter; 4—Support frame; 5—Protective shell; 6—Sensor; 7—Induction plate; 41—Support plate; 42—Base plate; 43—Laser avoidance hole. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] The present invention will now be described in detail with reference to the accompanying drawings. Figures 1 to 9 As shown.

[0034] Example 1: See Figures 1 to 4 A laser processing apparatus with a protective structure, comprising:

[0035] A laser emitter 1 has a motor 2 on its outlet side. The motor 2 drives a shutter 3, which has a through hole in the middle for the laser to pass through.

[0036] It also includes a control circuit board and several sensing units. The output of each sensing unit is electrically connected to the control circuit board. The sensing units are correspondingly set at the detection point of the laser processing device. When the detection point detects an illegal operation, the corresponding sensing unit sends a first signal to the control circuit board. After receiving the first signal, the control circuit board sends a control signal to the motor 2. The motor 2 drives the light shutter 3 to rotate, and the light shutter 3 blocks the laser. When the illegal operation is cleared, the sensing unit sends a second signal to the control circuit board. After receiving the second signal, the control circuit board sends a control signal to the motor 2. The motor 2 drives the light shutter 3 to rotate in the opposite direction, and the laser passes through the through hole of the light shutter 3.

[0037] This technical solution involves installing a motor 2 and a shutter 3 on the exit side of the laser emitter 1. A sensing unit detects whether the laser emitter 1 is being operated illegally. If illegal operation is detected, the control circuit board controls the motor 2 to drive the shutter 3 to rotate, blocking the laser beam. At this time, the laser emitter 1 continues to operate, only the laser beam is blocked; the operator remains in a safe operating condition. When the operator resumes operation, the illegal operation is resolved, the sensing unit sends a second signal to the control circuit board, which then controls the shutter 3 to rotate, allowing the laser beam to pass through the through-hole of the shutter 3, and the laser processing device continues to operate. During this process, the laser emitter 1 can remain continuously operational, thus reducing potential damage to the laser emitter 1. Illegal operation generally indicates a malfunction requiring on-site inspection and repair. For example, if the workpiece experiences localized overheating during laser processing, it is necessary to check if the cooling system is functioning properly. This may require opening the casing or the side door detection circuit. Illegal operation generally refers to actions that violate the operating instructions, such as opening the casing or side door of the machine during operation.

[0038] Secondly, it should be noted that the detection points of the laser processing device can be the opening and closing positions of the machine body, such as the opening and closing positions of the cover and the machine body, the opening and closing positions of the side door and the machine body, and the closing positions of the cover and the machine body. It can detect whether the cover, the side door, and the cover are open. If any of these parts are illegally opened, it will cause the optical shutter 3 to block the laser beam.

[0039] Secondly, the applicant needs to clarify that the first signal and the second signal here are relative signals. The first signal can be a current signal or it can be a signal without sending a current signal; similarly, the second signal can be a current signal or it can be a signal without sending a current signal. The first signal and the second signal are different and cannot both be signals without sending a current signal at the same time. That is, at least one of the first signal and the second signal is a current signal. When both are current signals, the two current signals are different, such as one being a high-level signal and the other being a low-level signal.

[0040] Furthermore, the sensing unit includes a proximity switch assembly, a touch sensor, or a displacement sensor.

[0041] The sensing unit is used to detect whether a component is being operated improperly. Currently, it is mainly used at opening and closing joints to sense whether opening or closing parts, such as covers, side doors, and lids, are open. For monitoring purposes, proximity switch assemblies, touch sensors, or displacement sensors can be used. When using a proximity switch assembly, the proximity switch includes a sensing part and a magnet part, which are respectively mounted on the two opening / closing components, such as on a cover or the main body. When the cover is closed, the sensing part and the magnet part are adjacent to or abut against each other, with a distance of less than 5mm. The magnetic field of the magnet part affects the sensing part, and the sensing part sends a current signal (the second signal) to the control circuit board. When the cover is open, the sensing part and the magnet part separate, with a distance far exceeding 5mm. The magnetic field of the magnet part cannot affect the sensing part, and the sensing part does not send a current signal to the control circuit board. Similarly, by sensing whether a cover is open, a proximity switch can also sense whether a side door or lid is open.

[0042] See Figure 2 , Figure 4 The laser emitter 1 is connected to a support frame 4 at its outlet end. The support frame 4 includes a base plate 42 fixed to the laser emitter 1. The base plate 42 is connected to a support plate 41. The base plate 42 is provided with a laser clearance hole 43. The motor 2 is fixed to the support plate 41. The rotating shaft of the motor 2 extends out of the support plate 41 and is connected to the light shutter 3.

[0043] To facilitate the connection of motor 2 and avoid the need to adjust the positions of motor 2 and optical shutter 3 simultaneously when adjusting the position of laser emitter 1, in this embodiment, motor 2 is fixed to laser emitter 1 by support frame 4, and the two are integrated; when adjusting the position of laser emitter 1, there is no need to adjust the positions of motor 2 and optical shutter 3; optical shutter 3 can be a metal block with a through hole in the middle, etc.

[0044] See Figure 4 , Figure 5 The light shutter 3 is connected to a sensing plate 7 on one side, and a sensor 6 is connected to the support plate 41. When the light shutter 3 rotates to a predetermined angle, the sensing plate 7 approaches or abuts the sensor 6. The sensor 6 senses the sensing plate 7 and sends a signal to the control circuit board. The control circuit board controls the motor 2 to stop rotating, and the light shutter 3 blocks the laser.

[0045] To ensure that the light shutter 3 blocks the laser after rotation, this embodiment includes a sensing element 7 and a sensor 6. The sensor 6 detects whether the sensing element 7 has reached a predetermined position. If it has, the motor 2 stops driving the light shutter 3 to rotate. The sensor 6 can be a proximity switch, photoelectric sensor, Hall effect sensor, etc., used to sense the position of the sensing element 7. In this embodiment, the combination of the sensing element 7 and the sensor 6 can be used to provide feedback on the position of the light shutter 3. Each time the motor 2 controls the light shutter 3 to rotate, its rotation angle is predetermined. This can be achieved by selecting a servo motor 2, where the encoder inside the servo motor 2 can provide feedback on the rotation angle. This is existing technology and will not be elaborated further. When the control circuit board sends a control signal to the motor 2, it can first determine the position of the light shutter 3 based on the signal sent by the sensor 6 before sending the control signal. For example, if the light shutter 3 is already in the blocking position, the control circuit board does not need to send a control signal to drive the motor 2 to rotate the light shutter 3 to the blocking position, but it can send a control signal to drive the motor 2 to rotate the light shutter 3 to the light emission position. In this embodiment, the motor 2 drives the light shutter 3 to switch between the blocking position and the light emission position. The predetermined angle can be 60, 70 or 90 degrees, etc., and in this embodiment it is 90 degrees.

[0046] See Figure 3 The support frame 4 is connected to a protective shell 5 for shielding the light gate, and a light outlet is provided on one side of the protective shell 5.

[0047] The protective shell 5 further prevents laser leakage; the laser emitted by the laser emitter enters the space enclosed by the support frame and the protective shell 5, so there is no possibility of laser leakage, thus improving safety.

[0048] See Figure 6The control circuit board is provided with a signal input detection circuit connected to the sensing unit. The signal input detection circuit includes a signal input interface connected to the sensing unit. The positive terminal of the signal input interface is connected to a signal input terminal through a series resistor. The intermediate potential point of the series resistor is connected to the power supply terminal through an intermediate resistor.

[0049] See Figure 8 In this embodiment, the series resistors are R32 and R2 connected in series, with R1 as the intermediate resistor. The resistance values ​​of R2 and R1 can be equal and much larger than that of R32. The signal input terminal is electrically connected to the control chip on the control circuit board. The control chip can be a processor, microcontroller, etc. One signal input terminal is connected to the signal terminal of the control chip. When the sensing unit sends a signal to the control chip through the signal input detection circuit, the current signal flows through the series resistor to the signal input terminal. The addition of an intermediate resistor and connection to a power supply in the circuit can change the potential of the current signal, facilitating the detection of the current signal.

[0050] See Figure 8 The signal input terminal is grounded through a grounding capacitor.

[0051] To reduce the impact of background noise, in this embodiment, the signal input terminal is grounded through a grounding capacitor C1 for filtering. Secondly, the negative terminal of the signal input interface is grounded.

[0052] Furthermore, the intermediate potential point is grounded through a reverse-connected TVS diode.

[0053] A TVS diode is a transient voltage suppressor diode used to control the voltage range at the signal input terminal within a reasonable range to ensure the normal operation of the control chip. When the voltage at the signal input terminal is too high, the TVS diode will break down in reverse and become conductive. The intermediate potential point can be the connection point between resistors R32 and R2.

[0054] See Figure 6 The control circuit board is equipped with a motor 2 control circuit for controlling the forward and reverse rotation of motor 2.

[0055] The motor 2 is controlled by the control circuit to drive the light shutter 3 to rotate in the forward or reverse direction, so that the light shutter 3 can block the laser or be passed through by the laser.

[0056] The control circuit for motor 2 can be existing technology. The application number is CN201920322631.3, and the utility model name is a utility model patent for a forward and reverse control circuit for motor 2 and an electric curtain. This patent describes the forward and reverse control circuit for motor 2.

[0057] See Figure 7 The detection area is equipped with two sensing units.

[0058] Preferably, the two sensing units at the detection point are connected to the control circuit board via a logic circuit. The logic circuit includes a NAND gate circuit, the two input terminals of which are respectively connected to the output terminals of the two sensing units, and the output terminal of the NAND gate circuit is connected to the control circuit board.

[0059] Two sensing units are configured to prevent errors from a single sensing unit and improve the accuracy of the judgment. To simplify the judgment, a NAND gate circuit can be placed between the sensing unit and the signal input detection circuit. When the output levels of the two sensing units are inconsistent or both are low, the NAND gate outputs a high level, which serves as the first signal. Motor 2 controls the optical shutter 3 to rotate and block the laser beam. When both sensing units output a high level, motor 2 controls the optical shutter 3 to rotate to the working position; if it is already in the working position, it remains unchanged. Of course, the logic circuit can also be of other forms.

[0060] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A laser processing apparatus with a protective structure, characterized by: It includes: The laser emitter has a motor on its outlet side, which drives an optical shutter. The optical shutter has a through-hole in the middle for the laser to pass through. It also includes a control circuit board and several sensing units. The output of each sensing unit is electrically connected to the control circuit board. The sensing units are correspondingly set at the detection point of the laser processing device. When the detection point detects an illegal operation, the corresponding sensing unit sends a first signal to the control circuit board. After receiving the first signal, the control circuit board sends a control signal to the motor. The motor drives the shutter to rotate, and the shutter blocks the laser. When the illegal operation is cleared, the sensing unit sends a second signal to the control circuit board. After receiving the second signal, the control circuit board sends a control signal to the motor. The motor drives the shutter to rotate in the opposite direction, and the laser passes through the through hole of the shutter.

2. The laser processing apparatus with a protective structure according to claim 1, characterized by: The sensing unit includes a proximity switch assembly, a touch sensor, or a displacement sensor.

3. The laser processing apparatus with a protective structure according to claim 1, characterized by: The laser emitter's outlet end is connected to a support frame. The support frame includes a base plate fixed to the laser emitter, a support plate connected to the base plate, and a laser clearance hole on the base plate. The motor is fixed to the support plate, and the motor's shaft extends out of the support plate and is connected to the optical shutter.

4. The laser processing apparatus with a protective structure according to claim 3, characterized by: A sensor is connected to one side of the light shutter, and a sensor is connected to the support plate. When the light shutter rotates to a predetermined angle, the sensor approaches or abuts the sensor. The sensor senses the sensor and sends a signal to the control circuit board. The control circuit board controls the motor to stop rotating, and the light shutter blocks the laser.

5. The laser processing apparatus with a protective structure according to claim 3, characterized by: The support frame is connected to a protective shell for shielding the light shutter, and a light outlet is provided on one side of the protective shell.

6. The laser processing apparatus with a protective structure according to claim 1, characterized by: The control circuit board is provided with a signal input detection circuit connected to the sensing unit. The signal input detection circuit includes a signal input interface connected to the sensing unit. The positive terminal of the signal input interface is connected to the signal input terminal through a series resistor. The intermediate potential point of the series resistor is connected to the power supply terminal through an intermediate resistor.

7. The laser processing apparatus with a protective structure according to claim 6, characterized by: The signal input terminal is grounded through a grounding capacitor, and the intermediate potential point is grounded through a reverse-connected TVS diode.

8. The laser processing apparatus with a protective structure according to claim 1, characterized in that: The control circuit board is equipped with a motor control circuit for controlling the forward and reverse rotation of the motor.

9. The laser processing apparatus with a protective structure according to Claim 1, characterized by: The detection area is equipped with two sensing units.

10. The laser processing apparatus with a protective structure according to claim 9, characterized by: The two sensing units at the detection point are connected to the control circuit board via a logic circuit. The logic circuit includes a NAND gate circuit. The two input terminals of the NAND gate circuit are connected to the output terminals of the two sensing units respectively, and the output terminal of the NAND gate circuit is connected to the control circuit board.

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