A kind of measuring device for the drill of a photoelectric drilling machine

Abstract

The utility model discloses a kind of to the measuring device of photoelectric drilling machine gong drill of opposite radiation, including base, infrared detection system and floating dust blowing system;Base is equipped with detection groove;Infrared detection system contains transmitting unit, receiving unit and signal processing circuit;Floating dust blowing system is composed of detection groove bottom blowhole, air pipe and gas source, can blow dust.This device can prevent dust shielding, improve optical path stability, signal can be directly connected control system, strong anti-electromagnetic interference ability, effectively improve gong drill detection precision and efficiency, applicable to PCB drilling machine gong drill state real-time monitoring.

Description

Technical Field

[0001] This utility model relates to PCB drilling and router cutter detection technology, and in particular to a through-beam photoelectric drilling machine router cutter measuring device, which, together with a PLC or other host computer, realizes real-time detection of physical parameters such as router cutter diameter, and is suitable for monitoring the status of router cutters in the drilling process of multilayer printed circuit boards. Background Technology

[0002] With the rapid development of industrial automation and integrated circuit technology, printed circuit boards (PCBs), as the core carrier of electronic devices, have evolved from traditional single-layer structures to multi-layer, high-density, and complex structures. Layer-to-layer communication in multi-layer PCBs requires drilling, and drilling accuracy directly depends on the condition of the router bit used in the PCB drilling machine. Wear, deformation, or diameter deviation of the router bit can lead to out-of-tolerance hole diameters, rough hole walls, and even board scrapping. Therefore, the condition of the router bit needs to be monitored and replaced in real time during use.

[0003] Currently, through-beam photoelectric sensors have been initially applied to the inspection of milling cutters, but the following technical problems still exist in actual working conditions, seriously affecting the reliability of inspection and production efficiency:

[0004] Dust obstruction leads to low detection accuracy: Copper shavings and resin dust generated during drilling can easily adhere to the lens surface of the sensor's transmitting and receiving ends, obstructing the light path and causing signal attenuation or distortion at the receiving end, resulting in "false judgment that no screw tool was detected" or "missed judgment of screw tool abnormality".

[0005] Weak anti-interference capability: Traditional sensors mostly use infrared light sources, which are easily interfered with in the complex electromagnetic environment of PCB processing workshops (such as high-frequency motors and static electricity), causing fluctuations in light source intensity and further affecting detection accuracy.

[0006] In view of the shortcomings of the existing technology, there is an urgent need to design a through-beam photoelectric drilling machine milling cutter measuring device with dustproof function to solve the pain points in the current milling cutter inspection. Utility Model Content

[0007] The purpose of this invention is to overcome the defects of existing through-beam photoelectric milling cutter detection devices and provide a through-beam photoelectric drilling machine milling cutter measuring device, specifically solving the technical problem of how to prevent copper shavings and dust generated during drilling from adhering to the sensor lens and avoiding light path obstruction.

[0008] To achieve the above and other related objectives, the technical solution provided by this utility model is: a through-beam photoelectric drilling machine milling cutter measuring device, comprising:

[0009] A base on which a detection groove is formed;

[0010] An infrared detection system is provided, comprising a transmitting unit, a receiving unit, and a signal processing circuit. The transmitting unit and the receiving unit are located on two opposite side walls of the detection slot, and the signal processing circuit is connected to both the transmitting unit and the receiving unit.

[0011] A dust blowing system, comprising an air blowing hole, an air guide pipe and an air source, wherein the air blowing hole is formed at the bottom of the detection tank and the air guide pipe connects the air blowing hole and the air source.

[0012] The preferred technical solution is as follows: the emitting unit adopts a red LED emitting module, and the emitting end of the red LED emitting module is provided with a dustproof lens.

[0013] The preferred technical solution is as follows: the receiving unit adopts a phototransistor receiving module, and the receiving end of the phototransistor receiving module is equipped with a dustproof lens.

[0014] The preferred technical solution is that the dustproof lens one and the dustproof lens two have the same structure, both made of quartz glass, and the inner wall is provided with an antistatic coating.

[0015] The preferred technical solution is as follows: the signal processing circuit is used to control the transmitting unit to emit red light with a wavelength of 660nm, and to control the receiving unit to receive the red light and convert it into an electrical signal, and to amplify and compare the electrical signal, and to convert the processed electrical signal into a high-low level digital signal and output it to the control system of the PCB drilling machine through a digital signal processing module integrated on the signal processing circuit.

[0016] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:

[0017] The dustproof effect is significant, solving the problem of light path obstruction: Compressed air is continuously blown into the test tank through the air hole of the floating dust blowing system, which can directly remove copper shavings and dust from the surface of the milling cutter entering the test tank, and at the same time blow away the dust adhering to the first and second surfaces of the dustproof lens; together with the dustproof lens with antistatic coating, dust adsorption is further reduced, ensuring unobstructed light path, avoiding detection misjudgment caused by dust, and improving detection accuracy.

[0018] Strong anti-interference capability and convenient debugging: It adopts a 660nm wavelength red light source, which improves the anti-interference capability in complex electromagnetic environments compared with traditional infrared light sources; and the red light is visible to the naked eye, which makes it easy to calibrate the coaxiality of the transmitting unit and the receiving unit during installation, thus improving debugging efficiency. Attached Figure Description

[0019] Figure 1 This is an exploded view of the gong measuring device involved in this utility model. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0021] Please see Figure 1 It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component 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 utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example:

[0024] like Figure 1 As shown, according to a general technical concept of this utility model, a through-beam photoelectric drilling machine milling cutter measuring device is provided, comprising:

[0025] Base 1, with a detection groove 11 formed on base 1;

[0026] The infrared detection system consists of a transmitting unit 21, a receiving unit 22, and a signal processing circuit 23. The transmitting unit 21 and the receiving unit 22 are located on two opposite side walls of the detection slot 11, and the signal processing circuit 23 is connected to both the transmitting unit 21 and the receiving unit 22.

[0027] The dust blowing system consists of an air blowing hole 12, an air guide pipe (not shown), and an air source (not shown). The air blowing hole 12 is formed at the bottom of the detection groove 11, and the air guide pipe connects the air blowing hole 12 and the air source.

[0028] like Figure 1 As shown, in an exemplary embodiment of this utility model, the emitting unit 21 adopts a red LED emitting module, and the emitting end of the red LED emitting module is provided with a dustproof lens.

[0029] like Figure 1 As shown, in an exemplary embodiment of this utility model, the receiving unit 22 adopts a phototransistor receiving module, and the receiving end of the phototransistor receiving module is provided with a dustproof lens.

[0030] like Figure 1 As shown, in an exemplary embodiment of this utility model, dustproof lens one and dustproof lens two have the same structure, both made of quartz glass, and have an antistatic coating on their inner walls to prevent dust from adhering.

[0031] like Figure 1 As shown, in an exemplary embodiment of this utility model, the signal processing circuit 23 is used to control the transmitting unit 21 to emit red light with a wavelength of 660nm, and to control the receiving unit 22 to receive the red light and convert it into an electrical signal, as well as to amplify and compare the electrical signal, and to convert the processed electrical signal into a high-low level digital signal and output it to the control system of the PCB drilling machine through the digital quantity processing module integrated on the signal processing circuit 23.

[0032] Working principle

[0033] Optical path transmission and reception: After the PCB drilling machine is started, the signal processing circuit 23 controls the red LED emitting module of the transmitting unit 21 to emit red light with a wavelength of 660nm. The red light passes through the dustproof lens and then shines horizontally toward the detection slot 11.

[0034] Router obstruction and signal conversion: When the router enters the detection slot 11 vertically, it will obstruct part of the red light. The intensity of the red light received by the phototransistor receiving module of the receiving unit 22 will be weakened, and the output photocurrent signal will be reduced. The photocurrent signal is filtered and amplified by the filtering and amplification module of the signal processing circuit 23, then compared with the preset threshold by the comparison module, and finally converted into a low-level signal by the digital output module and transmitted to the PLC control system, indicating that the router has entered the detection area.

[0035] Unobstructed state: When the roulette wheel is not in or out of the detection slot 11, the red light is unobstructed, the intensity of the red light received by the receiving unit 22 is the maximum, and the output photocurrent signal is processed and the digital output module outputs a high-level signal, which is transmitted to the PLC control system, indicating that the roulette wheel is not in the detection area.

[0036] Dust removal: The air source blows compressed air into the detection slot 11 through the air pipe and the air blowing hole 12. The airflow simultaneously blows away the dust on the surface of the roulette wheel and the surfaces of the first and second dustproof lenses, ensuring that the roulette wheel is clean and the lenses are unobstructed, and maintaining the stability of the optical path.

[0037] Therefore, this utility model has the following advantages:

[0038] This utility model discloses a through-beam photoelectric drilling machine router cutter measuring device, including a base, an infrared detection system, and a dust blowing system. The base is provided with a detection slot; the infrared detection system includes a transmitting unit, a receiving unit, and a signal processing circuit; the dust blowing system consists of an air hole at the bottom of the detection slot, an air guide pipe, and an air source, which can blow away dust. This device can prevent dust from obstructing the light path, improve the stability of the optical path, and the signal can be directly connected to the control system. It has strong anti-electromagnetic interference capabilities, effectively improving the accuracy and efficiency of router cutter detection, and is suitable for real-time monitoring of the router cutter status of PCB drilling machines.

[0039] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A device for measuring the diameter of a drill bit of a laser beam drill, characterized in that, include: A base on which a detection groove is formed; An infrared detection system is provided, comprising a transmitting unit, a receiving unit, and a signal processing circuit. The transmitting unit and the receiving unit are located on two opposite side walls of the detection slot, and the signal processing circuit is connected to both the transmitting unit and the receiving unit. A dust blowing system, comprising an air blowing hole, an air guide pipe and an air source, wherein the air blowing hole is formed at the bottom of the detection tank and the air guide pipe connects the air blowing hole and the air source.

2. A device for measuring the diameter of a drill bit of a photoelectric drill according to claim 1, characterized in that: The emitting unit adopts a red LED emitting module, and the emitting end of the red LED emitting module is equipped with a dustproof lens.

3. A device for measuring the position of a drill bit of a photoelectric drill according to claim 2, characterized in that: The receiving unit adopts a phototransistor receiving module, and the receiving end of the phototransistor receiving module is equipped with a dustproof lens.

4. A device for measuring the position of a drill bit of a photoelectric drill according to claim 3, characterized in that: The dustproof lens one and the dustproof lens two have the same structure, both made of quartz glass, and have an antistatic coating on their inner walls.

5. The device according to claim 1, characterized in that: The signal processing circuit is used to control the transmitting unit to emit red light with a wavelength of 660nm, and to control the receiving unit to receive the red light and convert it into an electrical signal, as well as to amplify and compare the electrical signal, and to convert the processed electrical signal into a high or low level digital signal and output it to the control system of the PCB drilling machine through a digital signal processing module integrated on the signal processing circuit.

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