Power supply circuit for radio frequency carbon dioxide laser and wire stripping laser equipment

Abstract

The utility model provides a power supply circuit for a radio frequency carbon dioxide laser and wire stripping laser equipment. The power supply circuit comprises a programmable controller, a first resistor and a second resistor, the pulse output end of the programmable controller is used for outputting first PWM voltage, the first resistor and the second resistor are sequentially connected to the pulse output end in series, and the series connection point between the first resistor and the second resistor is connected with the first power supply end of electric equipment through a wire. One end, far away from the series connection point, of the second resistor is connected with a second power supply end of the electric equipment through a wire, and second PWM voltage is provided for the electric equipment through the first power supply end and the second power supply end; wherein the resistance ratio of the first resistor to the second resistor is not smaller than 19: 5 and not larger than 21: 3, and the electric equipment is a radio frequency carbon dioxide laser. Through the PWM power supply circuit, an original programmable controller does not need to be replaced, and under the condition that the original programmable controller is not replaced, the system is suitable for various industrial sites, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser wire stripping, and in particular to a power supply circuit for a radio frequency carbon dioxide laser and a wire stripping laser device. BACKGROUND

[0002] The wire stripping laser device is an automatic device specially used for stripping cable sheaths, and realizes high-precision and high-efficiency cutting by using laser technology. The device is widely used in the electronic, electrical, communication and automobile manufacturing industries, and is used for processing various specifications of cables.

[0003] The wire stripping laser device needs to provide adaptive pulse width input. In the related art, the PC board card mode is mainly used to solve the problem. However, since the price of the PC board card and the price of the accompanying products are quite high, many industrial devices are not configured with the PC board card, and need to be purchased again, thereby increasing the hardware use cost.

[0004] Based on this, the application provides a power supply circuit for a radio frequency carbon dioxide laser and a wire stripping laser device. Practical new type content

[0005] The application aims to provide a power supply circuit for a radio frequency carbon dioxide laser and a wire stripping laser device, and solve the problem of high hardware cost when providing adaptive pulse width input for the wire stripping laser device.

[0006] The application achieves the purpose by adopting the following technical solutions:

[0007] In a first aspect, the application provides a power supply circuit for a radio frequency carbon dioxide laser, which comprises a programmable controller, a first resistor and a second resistor. The pulse output end of the programmable controller is used to output a first PWM voltage. The first resistor and the second resistor are connected in series in sequence on the pulse output end, and a connection point between the first resistor and the second resistor is connected to a first power supply end of an electric device through a wire. An end of the second resistor away from the connection point is connected to a second power supply end of the electric device through a wire, and a second PWM voltage is provided to the electric device through the first power supply end and the second power supply end. The resistance ratio of the first resistor and the second resistor is not less than 19:5 and not more than 21:3, and the electric device is a radio frequency carbon dioxide laser.

[0008] In some optional embodiments, the first PWM voltage is DC 24V, and the second PWM voltage is DC 5V.

[0009] In some optional embodiments, the power capacity of the first resistor and the second resistor is not less than 1 / 2W.

[0010] In some optional embodiments, the first resistor and the second resistor are adjustable resistors.

[0011] In some optional embodiments, the power supply circuit further comprises a linear voltage regulator, which is connected to the second PWM voltage supply line of the second PWM voltage to the power device.

[0012] In a second aspect, the application provides a stripping laser device, which comprises a touch screen, a radio frequency carbon dioxide laser, and the power supply circuit of any one of the first aspect; the power supply circuit comprises a programmable controller, the touch screen is used to receive the operation instructions of a user and send them to the programmable controller, the programmable controller is used to control the action sequence of each execution device of the stripping laser device to realize the automatic control of the stripping process; the radio frequency carbon dioxide laser is electrically connected with the programmable controller and is used to cut the cable sheath through a laser beam; the power supply circuit is electrically connected with the radio frequency carbon dioxide laser and is used to provide the second PWM voltage, which is used to make the radio frequency carbon dioxide laser emit invisible laser with a wavelength of 10.6 μm.

[0013] In some optional embodiments, the execution device comprises a cable feeding device, which is connected with the programmable controller and is used to control the feeding speed and position of the cable so as to move the cable to a predetermined cutting position during the cutting process.

[0014] In combination with the above technical solutions and the technical problems solved, the technical solutions to be protected by the application have the following advantages and positive effects: compared with the traditional solutions, which usually need to purchase programmable controllers supporting low-voltage PWM output or use PC boards, the cost is higher and the applicability is poor. The PWM power supply circuit provided by the application does not need to replace the original programmable controller, is suitable for various industrial sites without replacing the original programmable controller, and reduces the cost. The stripping laser device provided by the application realizes the automatic control of the stripping process through the combination of the touch screen and the programmable controller. The user can conveniently input parameters through the touch screen, which improves the convenience and efficiency of operation. The radio frequency carbon dioxide laser can emit invisible laser with a wavelength of 10.6 μm, has high focusing and energy concentration, can very accurately cut the cable sheath, and has a neat and smooth cutting edge without burrs or tearing phenomenon, which improves the stripping quality. The power supply circuit reduces the overall cost of the device. BRIEF DESCRIPTION OF DRAWINGS

[0015] The application will be further described below in combination with the drawings and examples.

[0016] Figure 1 is a structural schematic diagram of the power supply circuit for the radio frequency carbon dioxide laser provided by the embodiments of the application.

[0017] Figure 2 is a structural block diagram of stripping laser equipment provided by an embodiment of the present application. DETAILED DESCRIPTION

[0018] The present application will be further described below in conjunction with the drawings and the specific embodiments. It should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0019] A programmable logic controller (PLC) is a digital operation electronic system specially designed for application in an industrial environment. It uses a programmable memory to store instructions for performing logical operations, sequential control, timing, counting and arithmetic operations, etc. in its internal memory, and controls various types of mechanical equipment or production processes through digital or analog input and output, and can provide pulse width modulation function (PWM), but the PWM pulse output of the PLC supporting pulse width modulation function on the market is greater than the voltage of the pulse width input required by the actual stripping laser equipment.

[0020] For example, DC5V pulse width modulation can only find a programmable controller supporting DC5V PWM output or use a PC board card, and programmable controllers supporting DC5V PWM are generally expensive and have a long delivery period. Even if such a programmable controller is found, many of its functions may not meet other functions in an industrial site, and its applicability is poor. The price of a PC board card and its accompanying products is quite high, so many industrial equipment are not equipped with PC board cards. In order to reduce costs and increase the applicability of programmable controllers, especially when encountering a renovation project, it is desirable to increase the DC5V PWM pulse width output without replacing the original programmable controller.

[0021] The present application provides a power supply circuit for a radio frequency carbon dioxide laser and stripping laser equipment, which can convert the first PWM voltage output of a programmable controller into a second PWM voltage suitable for a radio frequency carbon dioxide laser.

[0022] Referring to Figure 1 , Figure 1 is a structural diagram of the power supply circuit for a radio frequency carbon dioxide laser provided by an embodiment of the present application.

[0023] The embodiment of the application provides a power supply circuit for a radio frequency carbon dioxide laser, the power supply circuit comprises: a programmable controller, a first resistor and a second resistor; a pulse output end of the programmable controller is used for outputting a first PWM voltage, the first resistor and the second resistor are sequentially connected in series on the pulse output end, and a connecting point between the first resistor and the second resistor is connected with a first power supply end of an electric device through a wire; and one end of the second resistor, which is away from the connecting point, is connected with a second power supply end of the electric device through a wire, so that the electric device is provided with a second PWM voltage through the first power supply end and the second power supply end; wherein the resistance ratio of the first resistor and the second resistor is not less than 19:5 and not more than 21:3, and the electric device is a radio frequency carbon dioxide laser.

[0024] The technical scheme provided by the embodiment converts the higher voltage PWM signal output by the programmable controller into a lower voltage PWM signal suitable for the radio frequency carbon dioxide laser through resistance voltage division. Specifically, the pulse output end of the programmable controller outputs a first PWM voltage. The first resistor and the second resistor are sequentially connected in series on the pulse output end of the programmable controller. According to the resistance voltage division principle, the current passing through each resistor is the same when the resistors are connected in series, and the voltage drop on each resistor is proportional to its resistance. By selecting a suitable resistance ratio (19:5<=R1 / R2<=21:3), a lower voltage, i.e., a second PWM voltage, can be obtained at the connecting point between the first resistor and the second resistor. In this case, the connecting point between the first resistor and the second resistor is connected with the first power supply end of the radio frequency carbon dioxide laser through a wire. One end of the second resistor, which is away from the connecting point, is connected with the second power supply end of the radio frequency carbon dioxide laser through a wire. In this way, the voltage received by the radio frequency carbon dioxide laser is the second PWM voltage after resistance voltage division, thereby realizing voltage conversion.

[0025] Therefore, compared with the traditional solution which usually needs to purchase a programmable controller supporting low-voltage PWM output or use a PC board card, the cost is higher and the applicability is poor. The present solution does not need to replace the original programmable controller through the PWM power supply circuit, is applicable to various industrial sites without replacing the original programmable controller, and reduces the cost.

[0026] In some embodiments, the first PWM voltage is DC 24V, and the second PWM voltage is DC 5V.

[0027] This is because the pulse output end of the programmable controller usually outputs a first PWM voltage of DC 24V. By selecting a suitable resistance ratio, a lower voltage, i.e., a second PWM voltage, can be obtained at the connecting point between the first resistor and the second resistor, which is preferably DC 5V in the embodiment.

[0028] In some embodiments, the power capacity of the first resistor and the second resistor is not less than 1 / 2W.

[0029] The power capacity of the first resistor and the second resistor is not less than 1 / 2W, which ensures that the resistors can work safely and stably in the circuit and will not be damaged due to excessive power.

[0030] In some embodiments, the first resistor and the second resistor are adjustable resistors. The adjustable resistors allow users to adjust the resistance value within a certain range, so that the voltage division ratio can be accurately controlled. By adjusting the adjustable resistors, fine tuning of the output voltage can be achieved, ensuring that the output voltage accurately reaches the required DC 5V.

[0031] As an example, see Figure 1 , the first PWM voltage (DC 24V) output by the PLC output end Y0 is divided by the first resistor R1 and the second resistor R2, the resistance value of the first resistor is 2kΩ, and the resistance value of the second resistor is 500Ω. The second PWM voltage (DC 5V) is provided. The COM end is the common end of the PLC.

[0032] In some embodiments, the power supply circuit further comprises a linear voltage regulator, which is connected to the power supply line of the second PWM voltage to the second PWM voltage of the power device.

[0033] The linear voltage regulator eliminates voltage fluctuations caused by power fluctuations, load changes or other interference factors through an internal feedback mechanism. The input second PWM voltage is adjusted to a more stable output voltage, which is provided to the power device, ensuring that the voltage received by the power device (such as a radio frequency carbon dioxide laser) is always stable, improving the performance and reliability of the power device.

[0034] Referring to Figure 2 , the application also provides a stripping laser device, which comprises a touch screen, a radio frequency carbon dioxide laser and the power supply circuit of any one of the above.

[0035] The power supply circuit includes a programmable controller, the touch screen is used for receiving operation instructions of a user and sending to the programmable controller, and the programmable controller is used for controlling action sequences of various execution devices of the stripping laser equipment to realize automatic control of the stripping process; the radio frequency carbon dioxide laser is electrically connected with the programmable controller, and is used for cutting the cable sheath through a laser beam; and the power supply circuit is electrically connected with the radio frequency carbon dioxide laser, and is used for providing a second PWM voltage for enabling the radio frequency carbon dioxide laser to emit invisible laser with a wavelength of 10.6 μm. That is, the programmable controller is used for controlling the stripping laser equipment and is also used for providing the second PWM voltage of the radio frequency carbon dioxide laser.

[0036] In a specific application, the user can input operation instructions through the touch screen, and the operation instructions can adjust the stripping length of the cable, the cutting speed and other parameters. The touch screen sends the operation instructions to the programmable controller. The programmable controller receives the operation instructions sent by the touch screen, and controls the action sequences of the execution devices of the stripping laser equipment according to a preset program. The programmable controller controls the movement of the servo motor and the stepping motor in the execution device, and realizes the feeding and positioning of the cable. Meanwhile, the programmable controller can also control the action of the electromagnetic valve in the execution device, and realize the clamping and loosening of the corresponding pneumatic clamping device of the electromagnetic valve, and fix and release the cable.

[0037] The power supply circuit includes a first resistor and a second resistor, and the voltage provided by the programmable controller is converted into the second PWM voltage through resistance voltage division, and the specific implementation manner is not described here. The radio frequency carbon dioxide laser cuts the cable sheath through a laser beam, emits invisible laser with a wavelength of 10.6 μm, and realizes high-precision and high-efficiency cutting.

[0038] Through the combination of the touch screen and the programmable controller, automatic control of the stripping process is realized. The user can conveniently input parameters through the touch screen, and the operation convenience and efficiency are improved. The radio frequency carbon dioxide laser can emit invisible laser with a wavelength of 10.6 μm, has high focusing and energy concentration, can very accurately cut the cable sheath, and the cutting edge is neat and smooth, without burr or tearing phenomenon, and the stripping quality is improved. The power supply circuit adopts resistance voltage division, has low cost and is easy to realize and maintain, and the overall cost of the equipment is reduced.

[0039] In some embodiments, the execution device includes a cable feeding device, and the execution device is connected with the programmable controller, and is used for controlling the feeding speed and position of the cable, so that the cable moves to a predetermined cutting position in the cutting process.

[0040] The execution device of the stripping laser equipment comprises a wire feeding device connected to the programmable controller for acting according to the control signal sent by the programmable controller and controlling the feeding speed and position of the cable to ensure that the cable moves to the predetermined cutting position during the cutting process.

[0041] The wire feeding device comprises, for example, a motor, a transmission mechanism (gear, belt, etc.). The motor drives the transmission mechanism according to the control signal of the programmable controller, so that the cable moves at a preset speed and position. The wire feeding mechanism ensures that the cable is stable and straight during movement, avoiding deviation of the cable during cutting. When the cable moves to the predetermined cutting position, the programmable controller controls the start of the radio frequency carbon dioxide laser to emit invisible laser with a wavelength of 10.6 μm to cut the outer skin of the cable. The cutting action of the laser works in cooperation with the feeding action of the cable to ensure the accuracy and continuity of the cutting process.

[0042] It should be noted that in the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. The "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b or c can represent a, b, c, a and b, a and c, b and c, or a and b and c, where a, b and c can be single or multiple. It should be noted that "at least one" can also be interpreted as "one or more".

[0043] The terms "first", "second", etc. in the specification and claims of the present application and the above-described drawings are configured to distinguish similar objects, and are not necessarily configured to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0044] The application is described from the use purpose, efficiency, progress and novelty, which meets the function improvement and use requirements emphasized by the patent law. The above description and drawings are only the preferred embodiments of the application, and are not limited to the application. Therefore, all similar, identical, equivalent replacement or modification within the scope of the patent application of the application shall be within the scope of the patent application protection of the application.

Claims

1. A power supply circuit for a radio frequency carbon dioxide laser, characterized by, The power supply circuit comprises a programmable controller, a first resistor and a second resistor; a pulse output end of the programmable controller is used to output a first PWM voltage, the first resistor and the second resistor are connected in series on the pulse output end, and a connecting point between the first resistor and the second resistor is connected to a first power supply end of an electrical device through a wire; an end of the second resistor away from the connecting point is connected to a second power supply end of the electrical device through a wire, and the second PWM voltage is provided to the electrical device through the first power supply end and the second power supply end; wherein a resistance ratio of the first resistor and the second resistor is not less than 19:5 and not more than 21:3, and the electrical device is a radio frequency carbon dioxide laser.

2. The power supply circuit of claim 1, wherein, The first PWM voltage is DC 24V, and the second PWM voltage is DC 5V.

3. The power supply circuit of claim 2, wherein, The power capacity of the first resistor and the second resistor is not less than 1 / 2W.

4. The power supply circuit of claim 1, wherein, The first resistor and the second resistor are adjustable resistors.

5. The power supply circuit of claim 1, wherein, The power supply circuit further comprises a linear voltage stabilizer connected to a power supply circuit of the second PWM voltage to the second PWM voltage of the electrical device.

6. A wire stripping laser apparatus, characterized by, The stripping laser equipment comprises a touch screen, a radio frequency carbon dioxide laser and the power supply circuit of any one of claims 1-5; the power supply circuit comprises a programmable controller, the touch screen is used to receive operation instructions of a user and send to the programmable controller, and the programmable controller is used to control the action sequence of each execution device of the stripping laser equipment to realize automatic control of the stripping process; the radio frequency carbon dioxide laser is electrically connected with the programmable controller and is used to cut the cable outer skin through a laser beam; and the power supply circuit is electrically connected with the radio frequency carbon dioxide laser and is used to provide the second PWM voltage to make it emit invisible laser with a wavelength of 10.6μm.

7. The wire stripping laser apparatus of claim 6, wherein, The execution device comprises a wire feeding device, and the execution device is connected with the programmable controller and is used to control the feeding speed and position of the cable to move the cable to a predetermined cutting position in the cutting process.

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