Broken tool detection method, broken tool detection structure, scrap suction cover and machining equipment

Abstract

The invention is suitable for the technical field of printed circuit board processing, and provides a broken cutter detection method, a broken cutter detection structure, a chip suction cover and processing equipment. The cutter breaking detection method is applied to the PCB machining equipment, the PCB machining equipment is provided with a cutter breaking sensor and a dust detection device, the cutter breaking detection method comprises the steps that the current state of a cutter is obtained, and the current state comprises the machining state and the non-machining state; when the cutter is in the machining state, whether the cutter is broken or not is detected through the dust detection device; and when the cutter is in the non-machining state, whether the cutter is broken or not is detected through the cutter breaking sensor. According to the invention, whether the cutter is broken can be identified in time.

Description

Technical Field

[0001] This application belongs to the field of printed circuit board processing technology, and particularly relates to a broken blade detection method, a broken blade detection structure, a chip suction hood, and processing equipment. Background Technology

[0002] During the manufacturing process of printed circuit boards (PCBs), the cutting tools are constantly under wear because they are used to remove material from the PCB. When the cutting edge reaches its wear limit and breaks or breaks abnormally, if the breakage is not detected in time and processing continues, the PCB will be damaged or even scrapped. Therefore, how to promptly identify whether a cutting tool has broken is a technical problem that urgently needs to be solved. Summary of the Invention

[0003] This application provides a broken tool detection method, a broken tool detection structure, a chip suction hood, a device, and a processing equipment, which can promptly identify whether a tool is broken.

[0004] In a first aspect, embodiments of this application provide a broken tool detection method applied to PCB processing equipment, wherein the PCB processing equipment is equipped with a broken tool sensor and a dust detection device, and the broken tool detection method includes:

[0005] Obtain the current state of the tool, which includes machining state and non-machining state; When the cutting tool is in the machining state, the dust detection device detects whether the cutting tool is broken. When the tool is in the non-machining state, the tool breakage sensor detects whether the tool has broken.

[0006] In this embodiment, by acquiring the current state of the cutting tool, and detecting whether the cutting tool is broken when the cutting tool is in the machining state, and detecting whether the cutting tool is broken when the cutting tool is not in the machining state, it can be ensured that the cutting tool can be detected in real time whether the cutting tool is in the machining state or not, and whether the cutting tool is broken can be identified in a timely manner.

[0007] In some embodiments of the first aspect, the step of detecting whether the cutting tool is broken by the dust detection device specifically includes: The first dust signal is obtained through a dust detection device; If the first dust signal is greater than the first dust threshold, then it is determined that the cutting tool is not broken. If the first dust signal is less than or equal to the first dust threshold, it is determined that there is an abnormal event in the cutting tool, and the abnormal event indicates that there is a possibility of the cutting tool breaking.

[0008] In some embodiments of the first aspect, after the step of determining that an abnormal event has occurred with the cutting tool, the method further includes: Control the cutting tool to stop machining; After the cutting tool stops machining, the tool breakage sensor detects whether the tool has broken.

[0009] In some embodiments of the first aspect, the PCB processing equipment is further configured with a tool detector, which, after the step of detecting whether the tool is broken by the tool breakage sensor, further includes: If the tool breakage sensor detects that the tool is broken, the tool is controlled to move to the tool detector. When the tool is in the tool detector, the actual diameter and actual length of the tool are detected. If the actual cutting diameter does not match the standard cutting diameter of the tool, or the actual cutting length does not match the standard cutting length of the tool, then the tool is determined to be broken.

[0010] In some embodiments of the first aspect, the PCB processing equipment is further configured with a tool detector, which, after the step of detecting whether the tool is broken by the tool breakage sensor, further includes: If the broken tool sensor detects that the tool is not broken, then the broken tool sensor is cleaned. If the tool is still not broken after cleaning, the tool is moved to the tool detector for tool breakage detection.

[0011] In some embodiments of the first aspect, the broken blade detection method further includes: When the broken blade sensor issues an alarm signal, the broken blade sensor and / or the cleaning assembly are driven to move so that the cleaning assembly can clean the broken blade sensor.

[0012] In some embodiments of the first aspect, the broken blade detection method further includes: If the tool is in the machining state and the dust detection device detects that the tool is not broken, and the tool is detected to be broken by the tool breakage sensor after machining is stopped, then it is detected whether the tool breakage sensor has shifted position relative to the tool. If the broken tool sensor does not shift position relative to the tool, the dust detection device is cleaned.

[0013] Secondly, embodiments of this application provide a broken tool detection structure, the broken tool detection structure comprising: The main body, along a first direction, is provided with a through-hole that can accommodate the cutting tool, the first direction being the axial direction of the main body; A broken tool sensor is disposed on the main body, and the detection end of the broken tool sensor is exposed outside the clearance hole. The broken tool sensor can detect whether the tool is broken. A dust detection device is connected to the main body, and the dust detection device is connected to the clearance hole.

[0014] Thirdly, embodiments of this application provide a dust collection hood, including a dust collection hood body, a dust collection device, and a broken blade detection structure as described in the second aspect above, wherein the broken blade detection structure is detachably connected to the dust collection hood body.

[0015] In some embodiments of the third aspect, the dust collection hood body is provided with a dust collection channel connected to the dust collection device, the dust collection channel is connected to an external dust collection device, the dust detection device is located between the dust collection device and the dust collection hood body, the dust collection channel is connected to the clearance hole, and the dust collection channel is located above the broken knife sensor.

[0016] Fourthly, embodiments of this application provide a PCB processing equipment, including the aforementioned broken tool detection structure, or including the aforementioned chip suction hood; The PCB processing equipment also includes a worktable and a cleaning component. The worktable is used to support the PCB, and the cleaning component is disposed on the worktable. The cleaning component and the broken tool detection structure can move relative to each other so that the cleaning component can clean the broken tool detection structure.

[0017] In some embodiments of the fourth aspect, the cleaning assembly includes a cleaning head, the cleaning portion of which extends along the first direction.

[0018] In some embodiments of the fourth aspect, the PCB processing equipment further includes a tool detector and a tool magazine assembly, both of which are disposed on the worktable. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic flowchart of a broken blade detection method provided in an embodiment of this application; Figure 2 This is another schematic flowchart of the broken blade detection method provided in the embodiments of this application; Figure 3 This is a schematic diagram of the PCB processing equipment provided in the embodiments of this application (the tool is not milling the PCB). Figure 4 yes Figure 3 A partial cross-sectional view of the PCB processing equipment shown. Figure 5 This is another structural schematic diagram of the PCB processing equipment provided in the embodiments of this application (the tool is milling the PCB). Figure 6 yes Figure 5 A partial cross-sectional view of the PCB processing equipment shown. Figure 7 yes Figure 5 The diagram shows the structure of a dust detection device in a PCB processing equipment. Figure 8 This is another structural schematic diagram of the PCB processing equipment in the embodiments of this application; Figure 9 yes Figure 8 The diagram shows the structure of the main body, broken tool sensor, chip suction hood body, sealing ring, pressure brush and guide shaft of the PCB processing equipment shown. Figure 10 yes Figure 9 The exploded structural diagram shows the main body, the broken knife sensor, the chip suction hood body, the sealing ring, the pressure brush, and the guide shaft. Figure 11 yes Figure 8 The diagram shows a cross-sectional view of the main body, broken blade sensor, chip suction hood body, sealing ring, and pressure brush in the PCB processing equipment shown. Figure 12 yes Figure 8 The diagram shows the structure of the main body and the broken tool sensor in the PCB processing equipment. Figure 13 yes Figure 8 The diagram shows a partial cross-sectional view of the PCB processing equipment. Figure 14 yes Figure 8 Another state diagram of the PCB processing equipment shown; Figure 15 yes Figure 8 A schematic diagram of the cleaning head of the cleaning component in the PCB processing equipment shown. Figure 16 yes Figure 8 The cross-sectional view of the cleaning head shown; Figure 17 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application.

[0021] The markings in the diagram mean: 100. PCB processing equipment; 00. Cutting tools; 02. PCB; 10. Main body; 101. Clearance hole; 1021. First air blowing channel; 1022. Second air blowing channel; 103. Receiving part; 20. Broken blade sensor; 21. Transmitter; 22. Receiver; 301. Power component; 30. Cleaning assembly; 31. Cleaning head; 311. Inspection port; 32. Cleaning section; 40. Dust collection hood body; 401. Dust collection channel; 41. Dust collection adapter; 42. Pressure brush; 43. Sealing ring; 50. Guide shaft; 51. Guide bearing; 60. Spindle; 61. Main frame; 70. Tool magazine assembly; 80. Dust detection device; 81. Lower adapter; 82. Transparent pipe; 83. Transmitter plate; 84. Receiver plate; 85. Mounting base; 86. Housing; 87. Upper adapter. Detailed Implementation

[0022] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0023] In the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0025] The broken tool detection method provided in this application can be applied to electronic devices such as controllers in PCB processing equipment. This application does not limit the specific type of electronic device. In one embodiment, the electronic device can be integrated into the control system of the PCB processing equipment. This control system can be used to achieve functions such as precise control of the PCB processing process, automated operation, quality monitoring, and equipment dimensioning. For example, the control system can realize real-time monitoring of whether the tool is milling the PCB. Based on this, the electronic device can obtain the current state of the tool through the control system.

[0026] It should be understood that the cutting tool in this application can refer to a tool used for milling PCBs or a tool used for drilling. By way of example and not limitation, the cutting tool in this application can be a forming tool, which is a tool whose cutting edge shape matches the final shape of the workpiece being machined.

[0027] To improve production efficiency and ensure machining accuracy, high-speed milling is typically used when milling PCBs. Therefore, milling PCBs in this application can refer to high-speed milling of PCBs. Of course, it is understood that low-speed milling and other methods can also be used to mill PCBs, and this application does not limit this.

[0028] To illustrate the technical solution of this application, the following description is provided in conjunction with specific accompanying drawings and embodiments.

[0029] Please see Figure 1 , Figure 1 The diagram illustrates a flow chart of a broken tool detection method provided in an embodiment of this application. This is an example, not a limitation. The broken tool detection method is applied to PCB processing equipment equipped with a broken tool sensor and a dust detection device. The broken tool detection method includes the following steps: Step S101: Obtain the current state of the tool, which includes machining state and non-machining state.

[0030] In some embodiments, the current state of the tool can be obtained by detecting whether the tool is milling the PCB. For example, if the tool is milling the PCB, it is determined that the tool is in a machining state; if the tool is not milling the PCB, it is determined that the tool is in a non-machining state.

[0031] A tool not milling the PCB indicates that the tool did not perform a milling operation on the PCB. For example, the tool did not perform a milling operation on the PCB before processing the PCB, or when switching to another program after completing one program.

[0032] As an example rather than a limitation, operations such as changing tools or switching the position of router points during PCB manufacturing are considered as switching to another program after completing one program.

[0033] In this embodiment, the broken tool sensor and dust detection device configured in the PCB processing equipment can both detect broken tools. Based on the current state of the tool, the electronic device can selectively select the device for broken tool detection from the broken tool sensor and dust detection device. In this way, the tool can be effectively detected whether it is in the processing state or not.

[0034] Step S102: When the tool is in the machining state, the dust detection device is used to detect whether the tool is broken.

[0035] Among them, detecting whether a tool is broken can refer to detecting whether the cutting edge of the tool is broken.

[0036] The dust signal collected by the dust detection device can reflect the amount of dust passing through the device. Based on this, the electronic equipment can determine whether the cutting tool is broken based on the dust signal.

[0037] In some embodiments, either the dust distribution density or the total amount of dust (e.g., the total mass or total quantity of dust) can be determined as a specific quantitative indicator of the dust signal, or the change in the electrical signal output by the dust detection device can be determined as a specific quantitative indicator of the dust signal. This application does not limit this.

[0038] It should be understood that the dust in this application includes, but is not limited to, dust formed from fine solid particles, dust formed from mixtures of solid particles, and debris.

[0039] If the tool is in machining mode, it means that the tool is milling the PCB, and the pressure brush is pressing down on the PCB (see below). Figure 5 and Figure 6 When the cutting edge is fully inserted into the PCB, the high-speed rotating tool generates a large amount of dust during milling. This dust flows into the dust detection device through the through hole on the side of the pressure foot cup. If the tool is not broken, the dust detection device will detect a relatively large dust signal. If the tool is broken, the dust detection device will detect a relatively small dust signal. Therefore, when the tool is in the machining state, the dust detection device can identify whether the tool is broken in a timely and accurate manner.

[0040] Electronic equipment uses dust detection devices to monitor the cutting edge condition of tools used in PCB milling equipment. This can prevent the cutting edge from breaking during PCB processing, which could cause scratches and damage to the PCB.

[0041] Step S103: When the tool is in a non-machining state, the tool breakage sensor detects whether the tool is broken.

[0042] The aforementioned broken tool sensor can detect broken tools using a through-beam method. The broken tool sensor includes a transmitter and a receiver; whether the receiver receives a signal transmitted by the transmitter determines whether the tool has broken.

[0043] By way of example and not limitation, the broken blade sensor can be a fiber optic sensor or a laser sensor, and this application does not limit the specific type of broken blade sensor.

[0044] It should be understood that when the broken knife sensor is a fiber optic sensor, the signal emitted by the transmitter is an optical signal. When the broken knife sensor is a laser sensor, the signal emitted by the transmitter is a laser signal.

[0045] If the cutting tool is not in a machining state, it means that the tool has not yet milled the PCB, and a large amount of dust will not be generated. The pressure brush has not yet pressed down on the PCB (see below). Figure 3 and Figure 4 When the cutting tool's edge is not yet inserted into the PCB, if the edge does not break, it will block the signal transmitted by the transmitter, and the receiver will not receive the signal. If the edge breaks, the receiver will receive the signal transmitted by the transmitter. Therefore, when the tool is not in a machining state, the electronic equipment can detect whether the tool is broken using a tool breakage sensor.

[0046] Electronic equipment uses a broken tool sensor to detect whether the tool is broken when changing tools or switching the position of the PCB. This can prevent the cutting edge of the tool from breaking unexpectedly when the PCB processing equipment switches to another program after processing a PCB before processing the PCB, which would cause scratches and damage to the PCB.

[0047] In this embodiment of the application, by obtaining the current state of the cutting tool, and when the cutting tool is in the machining state, detecting whether the cutting tool is broken by at least a dust detection device, and when the cutting tool is in the non-machining state, detecting whether the cutting tool is broken by a cutting tool sensor, it can be ensured that the cutting tool can be detected in real time whether the cutting tool is in the machining state or the non-machining state, and whether the cutting tool is broken can be identified in a timely manner.

[0048] In some embodiments of this application, such as Figure 2 As shown, at least the step of detecting whether the tool is broken by a dust detection device includes steps S201 to S203.

[0049] Step S201: Obtain dust signals through a dust detection device.

[0050] Step S202: If the dust signal is greater than the first dust threshold, it is determined that the tool has not broken.

[0051] Step S203: If the dust signal is less than or equal to the first dust threshold, it is determined that there is an abnormal event in the tool, and the abnormal event indicates that the tool may break.

[0052] Optionally, the first dust threshold can be set based on empirical values ​​or actual needs. This application does not limit the specific value of the first dust threshold.

[0053] When the tool is in the machining state, a dust detection device detects tool breakage. If the dust signal received by the electronic device is greater than a first dust threshold, it indicates that a large amount of dust has passed through the dust detection device, and it can be determined that the tool has not broken. If the dust signal received by the electronic device is less than or equal to the first dust threshold, it indicates that a small amount of dust has passed through the dust detection device, and it can be preliminarily determined that the tool may have broken, i.e., there is a possibility of tool breakage.

[0054] As an example, and not a limitation, when the dust signal represents the dust distribution density, a dust signal greater than the first dust threshold can mean that the dust distribution density is greater than a preset density threshold. When the dust signal represents the total amount of dust, a dust signal greater than the first dust threshold can mean that the total amount of dust is greater than a preset total amount threshold. When the dust signal represents the change in an electrical signal, a dust signal greater than the first dust threshold can mean that the change in the electrical signal output by the dust detection device is greater than a preset change threshold.

[0055] In some embodiments of this application, after determining that an abnormal event has occurred with the tool, the method further includes: Control the cutting tool to stop machining; After the tool stops machining, a tool breakage sensor detects whether the tool has broken.

[0056] In this embodiment, after determining that an abnormal event has occurred with the cutting tool, the electronic device can control the cutting tool to stop processing the PCB, so that the PCB processing equipment can detach from the PCB being processed, and the pressure foot assembly can move to the processing position, thereby realizing the transition of the cutting tool from the processing state to the non-processing state. After the cutting tool transitions from the processing state to the non-processing state, the electronic device can perform a secondary cutting tool breakage detection based on the cutting tool breakage sensor to further determine whether the cutting tool has broken.

[0057] In some embodiments of this application, the PCB processing equipment is further equipped with a tool detector, which, after the step of detecting whether the tool is broken by the tool breakage sensor, further includes: If a broken tool is detected by the broken tool sensor, the tool is controlled to move to the tool detector. When the tool is in the tool detector, the actual tool diameter and actual tool length are detected. If the actual tool diameter does not match the standard tool diameter, or the actual tool length does not match the standard tool length, then the tool is determined to have broken.

[0058] After the electronic equipment first uses a dust detection device to determine if there is an abnormal event in the cutting tool, and then performs a secondary detection using a tool breakage sensor, if the tool breakage sensor detects a broken tool, the breakage may be a false detection caused by chipping. To avoid false detections caused by chipping, the electronic equipment can detect the actual tool diameter and actual tool length. If the actual tool diameter does not match the standard tool diameter, or the actual tool length does not match the standard tool length, then the tool is determined to be broken; if the actual tool diameter matches the standard tool diameter, and the actual tool length matches the standard tool length, then the tool is determined not to be broken, but rather that the tool may have experienced chipping.

[0059] Optionally, the standard cutting diameter and standard cutting length of the tool can be pre-stored in the electronic device.

[0060] It should be understood that this application does not limit the method for determining whether the actual tool diameter matches the standard tool diameter, nor does it limit the method for determining whether the actual tool length matches the standard tool length. For example, the electronic device can determine whether the actual tool diameter and the standard tool diameter are the same; if they are the same, it determines that the actual tool diameter matches the standard tool diameter; if they are not the same, it determines that the actual tool diameter does not match the standard tool diameter of the tool. The electronic device can also calculate the difference between the standard tool diameter and the actual tool diameter; if the difference is less than a first difference threshold, it determines that the actual tool diameter matches the standard tool diameter; if the difference is greater than or equal to the first difference threshold, it determines that the actual tool diameter does not match the standard tool diameter. Similarly, the electronic device can determine whether the actual tool length and the standard tool length are the same; if they are the same, it determines that the actual tool length matches the standard tool length; if they are not the same, it determines that the actual tool length does not match the standard tool length of the tool. The electronic device can also calculate the difference between the standard tool length and the actual tool length; if the difference is less than a second difference threshold, it determines that the actual tool length matches the standard tool length; if the difference is greater than or equal to the second difference threshold, it determines that the actual tool length does not match the standard tool length.

[0061] Optionally, a first difference threshold and a second difference threshold can be set based on empirical values ​​or actual needs. This application does not limit the specific values ​​of the first difference threshold and the second difference threshold.

[0062] In some embodiments, when the electronic device further determines that the tool is broken based on the tool diameter and tool length, the PCB processing equipment can be controlled to move above the broken tool location (i.e., the broken tool point) on the PCB to wait for manual handling, thereby avoiding PCB damage caused by the broken tool and also making it easier for operators to find the broken tool point.

[0063] In some embodiments of this application, the PCB processing equipment is further equipped with a tool detector, which, after the step of detecting whether the tool is broken by the tool breakage sensor, further includes: If the tool breakage sensor detects that the tool is not broken, then the tool breakage sensor should be cleaned. If the tool is still not broken after cleaning, the tool is moved to the tool detector for broken tool detection.

[0064] In this embodiment, if the dust detection device detects an abnormality in the cutting tool while it is in the machining state, and the cutting tool is stopped after machining is controlled, the tool breakage sensor can be cleaned if it is detected that the tool is not broken. This improves the accuracy of the tool breakage detection and avoids false detections.

[0065] In some embodiments, the tool detector can detect tool breakage by acquiring the actual contour image of the tool, calculating the actual tool diameter and actual tool length, etc. For example, the actual contour image of the tool is matched with the standard contour image of the tool. If they match, the tool is determined not to be broken; if they do not match, the tool is determined to be broken. Detecting tool breakage based on the actual tool diameter and actual tool length can include: matching the actual tool diameter with the standard tool diameter, and matching the actual tool length with the standard tool length. If the actual tool diameter and the standard tool diameter do not match, or the actual tool length does not match, the tool is determined to be broken; if the actual tool diameter and the standard tool length match, the tool is determined not to be broken, but rather that the tool may have experienced chipping.

[0066] In some embodiments of this application, when the broken blade sensor issues an alarm signal, the broken blade sensor and / or the cleaning assembly are driven to move so that the cleaning assembly can clean the broken blade sensor.

[0067] In this embodiment, when the tool is not in a machining state, if the tool breakage sensor detects tool breakage and issues an alarm signal, it indicates that there is a lot of dust on the tool breakage sensor. Cleaning the tool breakage sensor with the cleaning component can remove the dust, thereby improving the accuracy of tool breakage detection.

[0068] In some embodiments of this application, the above-described blade breakage detection method further includes: If the tool is in the machining state and the dust detection device detects that the tool is not broken, and the tool is detected to be broken by the tool breakage sensor after machining is stopped, then it is detected whether the tool breakage sensor has shifted position relative to the tool. If no positional shift occurs, clean the dust detection device.

[0069] In this embodiment, if the broken blade sensor does not shift position relative to the blade, the false detection may be caused by dust accumulation in the dust detection device. In this case, cleaning the dust detection device can prevent false detections and improve the accuracy of broken blade detection.

[0070] Alternatively, the dust detection device can be cleaned by vacuuming it or by increasing the vacuuming intensity.

[0071] In some embodiments of this application, a tool breakage sensor can also be used to assist in detecting whether the tool has broken while the tool is in the machining state. In this case, the electronic device can clean the tool breakage sensor using the following cleaning method: While the tool is in the machining state, gas at the first pressure is continuously blown into the tool breakage sensor; When preset conditions are met, the system switches to blowing gas at a second pressure onto the broken blade sensor for a first time. The preset conditions include a preset time interval and the second pressure being greater than the first pressure.

[0072] It should be understood that this application does not limit the type of the first gas. For example, the first gas can be filtered clean, dry air.

[0073] Optionally, the pressure of the first gas can be set according to actual needs.

[0074] For example, the pressure of the first gas may be 0.08 MPa, 0.10 MPa, 0.12 MPa or 0.15 MPa, etc.

[0075] It should be understood that the electronic device can clean the broken blade sensor using the aforementioned cleaning method when it detects a command to activate the cleaning function. The aforementioned cleaning function can refer to the function of cleaning the broken blade sensor using the cleaning method provided in this application.

[0076] This application does not limit the triggering method of the above-mentioned start command. For example, it can be triggered manually or automatically when a contamination alarm is detected for the broken tool sensor.

[0077] Optionally, the start-up time of the cleaning function can be set according to experience or actual needs, but this application does not limit this.

[0078] Since the broken blade sensor includes a transmitter and a receiver, in practical applications, two air channels can be arranged to purge the transmitter and receiver respectively, thereby achieving cleaning of the transmitter and receiver.

[0079] It should be understood that the type of the second gas may be the same as or different from that of the first gas, and this application does not limit this.

[0080] Optionally, the pressure of the second gas and the preset time interval can be set according to empirical values ​​or actual needs.

[0081] For example, the pressure of the second gas can be 0.55 MPa, 0.60 MPa, or 0.65 MPa, etc. The preset time interval can be 5 s, 10 s, 15 s, or 20 s, etc.

[0082] In scenarios with small cutting volumes, continuous blowing of the first gas onto the broken tool sensor can achieve initial cleaning. However, due to the low pressure of the first gas, some dust may remain near the broken tool sensor during this process. Therefore, switching to blowing gas with a second pressure onto the broken tool sensor and continuing this process for the first time can quickly blow away a large amount of dust near the broken tool sensor using the stronger second gas, thereby improving the cleaning effect on the broken tool sensor. This effectively prevents dust from adhering to the broken tool sensor during PCB processing, improves the accuracy of broken tool detection, and intermittently blowing the second gas onto the broken tool sensor can also save gas consumption and prevent dust from splashing everywhere.

[0083] In PCB manufacturing, the processing stages are typically divided into rough milling and finish milling. Different cutting tools are used in these two stages, resulting in varying amounts of dust. Therefore, different cleaning methods can be employed to clean the broken tool sensor based on the dust generated at each stage. A preset processing state can be chosen for conditions with higher dust levels, such as the rough milling stage of a PCB.

[0084] It should be understood that, whether in the roughing or finishing milling stage, the electronic equipment can clean the tool breakage sensor when it detects a command to activate the cleaning function.

[0085] In one embodiment, during the rough milling stage of the PCB, a large amount of dust is generated. By continuously blowing a second pressure of gas onto the broken tool sensor while continuously blowing a first gas onto the broken tool sensor for a first time, the electronic device can quickly blow away the dust that is trapped near the broken tool sensor, thereby improving the cleaning effect on the broken tool sensor.

[0086] In another embodiment, during the precision milling stage of the PCB, less dust is generated. The electronic device can continuously blow the first gas to the broken tool sensor without blowing the second gas, which can save gas consumption and prevent dust from splashing everywhere due to excessive gas pressure.

[0087] As can be seen from the above, the cleaning method for the broken tool sensor provided in this application embodiment involves continuously blowing a first gas onto the broken tool sensor. Because the first gas pressure is relatively low, some dust may accumulate near the broken tool sensor during this process. Therefore, when preset conditions are met, the method switches to blowing a second-pressure gas onto the broken tool sensor for a first time. The preset conditions include at least one of a preset time interval and a preset processing state. Furthermore, the second gas pressure is greater than the first gas pressure. Therefore, the stronger second gas pressure can quickly blow away a large amount of dust accumulated near the broken tool sensor, thereby improving the cleaning effect on the broken tool sensor, effectively preventing dust from adhering to the broken tool sensor during PCB processing, and improving the accuracy of broken tool detection.

[0088] In some embodiments of this application, the step of switching to blowing gas at a second pressure onto the broken blade sensor and continuing for a first time when preset conditions are met specifically includes: Dust signals are acquired through a dust detection device; If the dust signal is greater than the second dust threshold, the gas at the second pressure is blown onto the broken blade sensor at the preset time interval and this continues for a first time.

[0089] Optionally, a second dust threshold can be set based on empirical values ​​or actual needs. This application does not limit the specific value of the second dust threshold.

[0090] The aforementioned second dust threshold may be greater than, less than, or equal to the first dust threshold; this application does not impose any limitation on this.

[0091] The electronic device collects dust signals near the broken blade sensor and determines whether the dust signal exceeds a first dust threshold. If the dust signal exceeds a second dust threshold, it is determined that there is a lot of dust in the environment where the broken blade sensor is located. In this case, by blowing gas at a second pressure onto the broken blade sensor at preset time intervals and continuing for a first time, the dust remaining near the broken blade sensor can be quickly blown away, thereby improving the cleaning effect on the broken blade sensor. If the dust signal is less than or equal to the second dust threshold, it is determined that there is less dust in the environment where the broken blade sensor is located. In this case, the first gas can be continuously blown onto the broken blade sensor instead of intermittently blowing the second gas, thereby saving gas consumption and preventing dust from splashing everywhere due to excessive gas pressure. The environment where the broken blade sensor is located can be the inside of the dust collection hood.

[0092] In some embodiments of this application, after the step of switching to blowing gas at a second pressure onto the broken blade sensor and continuing for a first time when a preset condition is met, the method further includes: Return to the step of continuously blowing gas at the first pressure to the broken tool sensor, and repeat until the machining is completed.

[0093] With this setup, a large amount of dust remaining near the broken tool sensor can be blown away by continuously blowing gas at the first pressure until the end of the processing.

[0094] In some embodiments of this application, a tool breakage sensor can also detect whether the tool has broken while the tool is in the machining state. In this case, the electronic device can also perform the following steps: Dust signals are acquired through a dust detection device; If the dust signal is less than the third dust threshold and the broken blade sensor does not issue an alarm signal, drive the broken blade sensor and / or the cleaning component to move so that the cleaning component can clean the broken blade sensor.

[0095] This configuration allows the cleaning component to move relative to the broken blade sensor, cleaning the sensor, removing dust, and thus improving the cleaning effect.

[0096] Optionally, a third dust threshold can be set based on empirical values ​​or actual needs. This application does not limit the specific value of the third dust threshold.

[0097] The aforementioned third dust threshold may be greater than or less than the first dust threshold or the second dust threshold, or it may be equal to the first dust threshold or the second dust threshold. This application does not limit this.

[0098] In some embodiments, if a tool breaks while in the processing state or the tool has been removed, and the tool breakage sensor detects that the tool is not broken, the dust extraction device can be controlled to extract dust from the environment where the tool breakage sensor is currently located, continuously blow a fourth gas onto the tool breakage sensor, and drive the tool breakage sensor and / or the cleaning component to move so that the cleaning component can clean the tool breakage sensor.

[0099] When the suction power of the dust collector is too weak, the humidity in the air is too high, or there are other oily substances in the air, dust combines with these moisture and oily substances and adheres to the end face of the broken tool sensor. Even using a second gas with higher pressure may not be able to blow it off. This can cause the broken tool sensor to still detect that the tool is not broken even when the tool is being processed or has been removed. In this case, the PCB processing equipment will generate a contamination alarm for the broken tool sensor. In this situation, the broken tool sensor can be moved to the cleaning component. The cleaning part (such as a brush) in the cleaning component can brush the broken tool sensor up and down. While brushing, the air blowing and dust collection device can be used to quickly blow away the dust that has been brushed off and suck it away, allowing the broken tool sensor to work normally, deactivating the contamination alarm, and completing the cleaning process of the broken tool sensor. This ensures the effectiveness of the broken tool sensor's broken tool detection function, reduces the time spent manually cleaning the fiber optic head, improves the automation level of the equipment, facilitates the implementation of fully automated equipment, and increases the equipment's uptime.

[0100] This embodiment of the application continuously blows a first gas onto the broken blade sensor, and when a preset condition is met, switches to blowing a second gas pressure onto the broken blade sensor for a first time. By continuously blowing a weak gas and intermittently blowing a strong gas, the dust attached to the surface of the broken blade sensor can be effectively removed, realizing fully automatic cleaning of the broken blade sensor. This avoids the accumulation of dust on the surface of the broken blade sensor, thereby significantly improving the cleaning effect of the broken blade sensor, improving the long-term reliability of the broken blade detection function, and reducing the frequency of manual intervention.

[0101] In one application scenario, taking the broken tool sensor as an example of a fiber optic sensor, after the spindle removes the rough milling tool from the fiber optic head of the transmitter or receiver end of the fiber optic sensor, it begins the rough milling stage of the PCB. At this time, there is a lot of dust and the suction negative pressure is small. At this time, the dust inside the pressure foot cup cannot be quickly sucked away, resulting in a lot of accumulated dust that splashes everywhere. At this time, the fiber optic head can be cleaned by continuously blowing a first gas (e.g., air pressure of 0.1 MPa) onto the fiber optic head. During the continuous blowing of the first gas onto the fiber optic sensor, a second gas (e.g., air pressure of 0.6 MPa) is blown onto the fiber optic sensor at preset time intervals. For example, the second gas is blown onto the fiber optic sensor every time the tool is lifted, to avoid continuous dust accumulation on the end face of the fiber optic head and to ensure the cleanliness of the end face of the fiber optic head.

[0102] After rough milling and replacing the fine milling cutter, the PCB fine milling stage begins. At this stage, less dust is generated and the suction negative pressure is greater, resulting in less dust accumulation inside the pressure foot cup. At this time, the fiber head end face can be cleaned by continuously blowing the first gas (e.g., at a pressure of 0.1 MPa) onto the fiber head to ensure cleanliness.

[0103] When the suction power of the vacuum cleaner is too weak, the humidity in the air is too high, or other oily substances are present in the air, dust combines with water vapor and oily substances in the air to form oil stains and clumps, which adhere to the end face of the optical fiber head. Even using a second gas with higher air pressure may not be able to blow them off. If these clumps and oil stains are not cleaned in time, the fiber optic head's broken blade detection function will fail. In this situation, the PCB processing equipment will generate a contamination alarm for the optical fiber head. At this time, the optical fiber head can be controlled to move to the cleaning component, and the cleaning component can be controlled to brush the dust on the optical fiber head. While brushing, air is blown and the vacuum cleaner is used to remove the large dust particles that have been brushed off, thus completing the cleaning process of the optical fiber head, allowing the optical fiber head to work normally, ensuring the continued effectiveness of the broken blade detection function, and deactivating the alarm on the PCB processing equipment.

[0104] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0105] Please refer to Figures 3 to 14 As shown, in a second aspect, embodiments of this application provide a broken tool detection structure, which can be used in PCB processing equipment. The PCB processing equipment may include a dust suction hood body 40, a dust suction adapter 41, a pressure brush 42, a sealing ring 43, a guide shaft 50, a guide bearing 51, a spindle 60, and a main frame 61. The spindle 60 is used to connect with the cutting tool.

[0106] The broken blade detection structure includes a main body 10, a broken blade sensor 20, and a connected dust collection device and a dust detection device 80.

[0107] The main body 10 is provided with a through-hole 101 along the first direction, which is the axial direction of the main body 10.

[0108] The clearance hole 101 is used to accommodate the cutting tool, which can be a milling cutter or a drill bit, etc.

[0109] The broken blade sensor 20 is disposed on the main body 10, and the detection end of the broken blade sensor 20 is exposed in the clearance hole 101.

[0110] The broken tool sensor 20 can be a fiber optic sensor or a laser sensor, etc. The detection end of the broken tool sensor 20 is exposed outside the clearance hole 101 without any obstruction, enabling broken tool detection even when the tool is not in a machining state. The detection end of the broken tool sensor 20 includes a receiving end and a transmitting end.

[0111] The dust detection device 80 is connected to the clearance hole 101.

[0112] When the cutting tool is in the machining state and generates a large amount of dust, the dust passes through the clearance hole 101. The dust detection device 80 is connected to the clearance hole 101, which enables the dust detection device 80 to detect the dust and, on this basis, to detect the broken cutting tool.

[0113] In this embodiment, the above-mentioned tool breakage detection structure can ensure that the tool can be detected in real time whether the tool is in a machining state or not, and can promptly identify whether the tool is broken.

[0114] As an implementable method, the dust detection device 80 includes an upper adapter 87, a lower adapter 81, a housing 86, and a detection module. Holes are provided between the upper adapter 87, the lower adapter 81, the housing 86, and the detection module. When processing PCBs and generating a large amount of dust, the dust passes through these holes and eventually flows into a dust collection device.

[0115] The detection module is located in the middle of the housing 86 and is connected to the upper adapter 87 and the lower adapter 81 respectively. The upper adapter 87 and the lower adapter 81 can be directly fixed to the detection module or indirectly connected to the detection module through pipes. The housing 86 is connected to the upper adapter 87 and the lower adapter 81 to protect the detection module.

[0116] The upper adapter 87 can be directly connected to the vacuum cleaner, or indirectly connected to the vacuum cleaner through the vacuum hose, while the lower adapter 81 can be directly connected to the dust collection cover body 40, or indirectly connected to the dust collection cover body 40 through the vacuum hose.

[0117] The detection module includes a mounting base 85, a transmitting plate 83, and a receiving plate 84. The mounting base 85 has a through hole in the center for dust to pass through. Several circular holes are located on the side of the mounting base 85, perpendicular to the through hole, for the light emitted by the transmitting plate 83 to pass through and be received by the receiving plate 84. When dust passes through the through hole in the center of the mounting base 85, the light signal received by the receiving plate 84 changes, ultimately generating a change in the electrical signal used for broken tool detection.

[0118] A transparent pipe 82 can also be installed in the through hole in the middle of the fixing base 85 to prevent dust from blocking the light transmission hole on the side of the fixing base 85 and affecting the transmission of light signals.

[0119] In one embodiment, the main body 10 is also provided with an air blowing channel, which is tangent to the clearance hole 101.

[0120] One or more air blowing channels can be provided. Gas in the air blowing channels can be blown into the interior of the clearance hole 101 along the tangential direction. The air blowing channels can be connected to an air source, such as an air compressor or a high-pressure gas cylinder. After the gas in the air blowing channels is blown into the interior of the clearance hole 101 along the tangential direction, it not only blows directly along the inner wall of the clearance hole 101 towards the detection end of the broken knife sensor 20, causing the dust remaining near the detection end to be quickly dispersed and finally sucked away by the dust collection device, but also forms a gas vortex similar to a "tornado" within the clearance hole 101 (e.g., Figure 12 (As shown by the dashed line), the dust on the detection end can be carried away more quickly by the upward suction generated by the gas vortex, which improves the cleaning effect of the broken blade sensor 20 and also improves the subsequent dust collection and dust prevention effect.

[0121] As one possible implementation method, the detection end of the broken blade sensor 20 is located at the tangent point between the air blowing channel and the clearance hole 101.

[0122] This configuration facilitates the arrangement of the relative positions of the detection end of the broken blade sensor 20, the air blowing channel, and the clearance hole 101, and allows the gas in the air blowing channel to be blown into the interior of the clearance hole 101 along the tangential direction of the clearance hole 101.

[0123] It should be noted that the tangent point between the air blowing channel and the clearance hole 101 can be the tangent point between the inner wall surface of the air blowing channel and the inner wall surface of the clearance hole 101.

[0124] Please refer to Figures 8 to 12 In some embodiments, the air blowing channel includes a first air blowing channel 1021 and a second air blowing channel 1022. Both the first air blowing channel 1021 and the second air blowing channel 1022 are tangent to the clearance hole 101, and the first air blowing channel 1021 and the second air blowing channel 1022 are symmetrical about the axis of the main body 10.

[0125] By adopting the above scheme, gas can be simultaneously introduced into the interior of the clearance hole 101 through the first air blowing channel 1021 and the second air blowing channel 1022, which are centrally symmetrical about the axis of the clearance hole 101. This allows a gas vortex to be formed inside the clearance hole 101 more quickly, and the suction force generated by the gas vortex is greater. This allows the dust on the detection end of the broken knife sensor 20 to be carried away more quickly, thus improving the cleaning effect of the broken knife sensor 20.

[0126] It should be noted that the axis of the clearance hole 101 is centrally symmetrical and can be arranged clockwise or counterclockwise (usually consistent with the machining direction of the spindle 60 of the machining equipment). The machining direction of the spindle 60 can be the same as the rotation direction of the gas vortex to improve the cleaning effect of the broken tool sensor 20.

[0127] Optionally, the broken knife sensor 20 includes a transmitter 21 and a receiver 22, both of which are disposed on the main body 10 along a second direction, and the transmitting end of the transmitter 21 and the receiving end of the receiver 22 are exposed in the clearance hole 101; the second direction is the radial direction of the main body. The transmitting end of the transmitter 21 is located at the tangent point between the first air blowing channel 1021 and the clearance hole 101, and the receiving end of the receiver 22 is located at the tangent point between the second air blowing channel 1022 and the clearance hole 101.

[0128] With this configuration, the transmitting end of the transmitter 21 and the receiving end of the receiver 22 can be cleaned through the first air blowing channel 1021 and the second air blowing channel 1022, respectively.

[0129] Please refer to Figures 8 to 12 In some embodiments, the main body 10 may be provided with a receiving portion 103, which may be a receiving groove or a receiving hole, etc. The broken knife sensor 20 is disposed in the receiving portion 103 to facilitate the arrangement of the position of the broken knife sensor 20.

[0130] The accommodating portion 103 can extend along the radial direction of the clearance hole 101. Two accommodating portions 103 are provided, and the two accommodating portions 103 are centrally symmetrical about the axis of the clearance hole 101 and are respectively used to accommodate the receiver 22 and the transmitter 21.

[0131] This configuration allows the relative positions of the receiver 22 and the transmitter 21 to be defined by the two receiving parts 103. After installation, the receiver 22 and the transmitter 21 have high coaxiality, eliminating the need for further adjustment of the firing accuracy between the receiver and the transmitter. It also facilitates installation and disassembly, as well as subsequent maintenance.

[0132] For example, both accommodating portions 103 are configured as round holes and can be integrally machined, with small fitting gaps between the receiving end and the accommodating portion 103 and between the transmitting end and the accommodating portion 103.

[0133] Optionally, the extending direction of the receiving portion 103 is perpendicular to the axis of the air blowing channel.

[0134] This design prevents gas in the air blowing channel from being blown directly into the receiving part 103 through the opening of the air blowing channel, which would cause dust on the receiving end and transmitting end to be blown into the receiving part 103, thereby preventing interference from the air blowing at the receiving end and transmitting end.

[0135] It is understandable that when gas is simultaneously introduced into the clearance hole 101 through multiple air blowing channels, the resulting gas vortexes rotate in the same direction. When any one air blowing channel is blocked by dust or debris, causing the gas pressure to weaken or be completely blocked, the gas vortexes formed by the gas introduced into the clearance hole 101 through other air blowing channels can also carry away the dust or debris blocking the air blowing channel.

[0136] It should be noted that the receiving part 103 and the air blowing channel can be connected through the orifice of the air blowing channel, so that the gas in the air blowing channel can be directly blown to the broken knife sensor 20 through the orifice of the air blowing channel. The receiving part 103 and the air blowing channel can be set one-to-one.

[0137] Optionally, the detection end of the broken blade sensor 20 is tangent to the clearance hole 101; or, the detection end of the broken blade sensor 20 protrudes into the clearance hole 101.

[0138] This configuration allows for better cleaning of the detection end of the broken blade sensor 20 and better detection of broken blades.

[0139] Please refer to Figures 3 to 12 Thirdly, this application also provides a chip suction hood, including a chip suction hood body 40 and a broken blade detection structure as described above, wherein the broken blade detection structure is detachably connected to the chip suction hood body 40.

[0140] The chip suction cover provided in this application includes a broken tool sensor 20 and a dust detection device 80. The detection end of the broken tool sensor 20 is exposed in the clearance hole 101, and the dust detection device 80 is connected to the clearance hole 101. With this configuration, it can ensure that the tool can be detected in real time whether the tool is in the processing state or not, and can promptly identify whether the tool is broken.

[0141] It should be noted that the broken knife detection structure and the chip suction hood body 40 can be detachably connected by means of snap-fit, screw connection, bolt connection or buckle connection.

[0142] Optionally, the dust collection hood body 40 is provided with a dust collection channel 401 connected to the dust collection device, and the dust detection device 80 is located between the dust collection device and the dust collection hood body 40. The dust collection channel 401 is connected to the clearance hole 101 and is located above the broken knife sensor 20.

[0143] With this configuration, dust inside the clearance hole 101 can be sucked away through the dust suction channel 401.

[0144] It is understandable that the vacuuming channel 401 can be connected to a vacuuming device via the vacuuming adapter 41.

[0145] Please refer to Figures 3 to 12 Fourthly, embodiments of this application also provide a broken blade detection device, including the broken blade detection structure as described above, or including the chip suction hood as described above.

[0146] The broken tool detection device provided in this application includes a broken tool sensor 20 and a dust detection device 80. The detection end of the broken tool sensor is exposed in the clearance hole 101, and the dust detection device 80 is connected to the clearance hole 101. With this configuration, it can ensure that the tool can be detected in real time whether the tool is in the processing state or not, and can promptly identify whether the tool is broken.

[0147] Please refer to this as well. Figures 13 to 16 Optionally, the broken blade detection device also includes a worktable and a cleaning component 30. The worktable is used to support the PCB, and the cleaning component 30 is disposed on the worktable. The cleaning component 30 and the broken blade detection structure can move relative to each other so that the cleaning component 30 can clean the broken blade detection structure.

[0148] With this configuration, when the detection end of the broken knife sensor 20 in the broken knife detection structure is stuck with dust or other substances and cannot be cleaned by high-pressure gas, the cleaning component 30 can be moved relative to the broken knife detection structure to clean the detection end of the broken knife sensor 20 using the cleaning component 30.

[0149] It is understood that relative movement can occur between the detection end of the broken blade sensor 20 and the cleaning assembly 30. The broken blade detection device may also include a power component 301, which is used to drive the cleaning assembly 30 and / or the broken blade detection structure to move, so that relative movement can occur between the cleaning assembly 30 and the broken blade detection structure.

[0150] It should be noted that the broken blade detection device may also include a control component, which may be a control chip or a programmable logic controller, etc. The power component 301 and the air source are electrically connected to the control component. The broken blade sensor 20 can be automatically cleaned periodically by the cleaning component 30 without human intervention, thus reducing the time required for manual cleaning.

[0151] It is understood that the power component 301 can be a cylinder, a hydraulic cylinder, or a linear module, etc. The power component 301 may drive only the cleaning component 30 to move; the power component 301 may drive only the broken blade detection structure to move; or, the power component 301 may drive the cleaning component 30 and the broken blade detection structure to move in opposite directions.

[0152] Please refer to the following for details. Figure 3 and Figure 16 For example, the broken blade sensor 20 is connected to the main body 10, the main body 10 is connected to the dust collection hood body 40, and the power component 301 is set as a telescopic cylinder. The telescopic cylinder drives the dust collection hood body 40, the main body 10 and the broken blade sensor 20 to move up and down relative to the cleaning component 30.

[0153] Optionally, the cleaning assembly 30 includes a cleaning head 31, and a cleaning portion 32 of the cleaning head 31 extends along a first direction. By adopting the above solution, the broken blade detection structure can be cleaned through the cleaning portion 32.

[0154] Multiple cleaning units 32 may be provided, and the multiple cleaning units 32 are spaced apart along the first direction.

[0155] This design prevents dust from falling onto other components (such as the tool magazine holder) after being cleaned, thanks to the cleaning section 32 below.

[0156] For example, two cleaning sections 32 are provided, and the two cleaning sections 32 are arranged sequentially in the vertical direction. When the power unit 301 drives the broken knife detection structure to move up and down relative to the cleaning head 31, the broken knife detection structure can contact the two cleaning sections 32 one after the other.

[0157] Optionally, the cleaning head 31 is provided with an observation hole 311, which is located between the two cleaning sections 32 and / or on the side of one of the cleaning sections 32 away from the other. The observation hole 311 penetrates the cleaning head 31 and can be set to correspond to the detection head of the broken blade sensor 20.

[0158] With this setup, the cleaning section 32 can contact the detection end of the broken blade sensor 20. After cleaning the detection end of the broken blade sensor 20, the laser emitted from the detection end of the broken blade sensor 20 can pass through the observation hole 311 to directly determine whether the detection end is clean. There is no need to lift the dust collection hood body 40 before detection, making the operation simple and convenient.

[0159] For example, the detection end of the broken knife sensor 20 includes the transmitting end of the transmitter 21 and the receiving end of the receiver 22. There are two cleaning heads 31 corresponding to the transmitting end and the receiving end. The cleaning parts 32 of the two cleaning heads 31 can clean the transmitting end and the receiving end respectively.

[0160] With this setup, after cleaning the transmitter and receiver, the observation hole 311 is positioned corresponding to the transmitter and receiver. If the laser emitted by the transmitter can be received by the receiver, it can be determined that the transmitter and receiver have been cleaned properly. If the laser emitted by the transmitter cannot be received by the receiver, it can be determined that the transmitter and receiver have not been cleaned properly. Thus, the cleaning of the transmitter and receiver can be determined through the observation hole 311 without having to lift the dust collection cover body 40 for inspection, making the operation simple and convenient.

[0161] For example, two observation holes 311 are provided. One observation hole 311 is located between the two cleaning parts 32, and the other observation hole 311 is located on the lower side of one cleaning part 32 away from the other cleaning part 32. During the process of the broken knife sensor 20 moving upward relative to the cleaning head 31, the two cleaning parts 32 come into contact with the broken knife sensor 20 in turn. The detection end of the broken knife sensor 20 can be determined by the two observation holes 311 respectively.

[0162] The cleaning unit 32 can be a brush made of materials such as nylon or pig bristles. It can be used to brush away dust or debris adhering to the detection end of the broken tool sensor 20. Alternatively, it can be made of absorbent material such as plush to clean oil stains from the detection end of the broken tool sensor 20. The cleaning head 31 can be fixedly mounted on the tool magazine base of the tool magazine assembly 70. A swing cylinder or motor can be mounted on the tool magazine base, and the cleaning head 31 is directly mounted on the output shaft of the swing cylinder or motor. The rotation of the swing cylinder or motor cleans the detection end of the broken tool sensor 20. The tool magazine assembly 70 is mounted on a worktable, and the cleaning head 31 can also be fixedly mounted on the worktable.

[0163] Optionally, the broken blade detection device also includes a dust cover, with the main body 10 located inside the dust cover.

[0164] This configuration prevents dust from splashing when air is introduced into the clearance hole 101 through the air blowing channel to clean the detection end of the broken blade sensor 20 and when the broken blade detection structure is cleaned through the cleaning head 31.

[0165] Please refer to Figures 3 to 16 Fifthly, embodiments of this application also provide a PCB processing equipment, including a broken tool detection structure as described in the second aspect above, or a chip suction hood as described in the third aspect above, or a broken tool detection device as described in the fourth aspect above. The PCB processing equipment 100 is provided with a cutting tool, which passes through a clearance hole 101, and the broken tool detection mechanism is used to detect broken tools.

[0166] The PCB processing equipment provided in this application includes a broken tool sensor 20 and a dust detection device 80. The detection end of the broken tool sensor is exposed in the clearance hole 101, and the dust detection device 80 is connected to the clearance hole 101. With this configuration, it can ensure that the tool can be detected in real time whether the tool is in the processing state or not, and can promptly identify whether the tool is broken.

[0167] The PCB processing equipment 100 provided in this application embodiment may also include a dust extraction adapter 41, a pressure brush 42, a sealing ring 43, a guide shaft 50, a guide bearing 51, a main frame 61, and a power component 301.

[0168] The chip suction hood body 40, sealing ring 43, main body 10, and pressure brush 42 are all provided with through holes. The main shaft 60 is fixed on the main frame 61 and passes through the sealing ring 43, chip suction hood body 40, main body 10, and pressure brush 42 in sequence to perform PCB cutting.

[0169] The guide bearing 51 and the power component 301 are both fixed on the main frame 61. One end of the guide shaft 50 is connected to the output end of the power component 301 and cooperates with the guide bearing 51 to realize the up and down lifting movement. The other end is connected to the chip suction hood body 40, so that the chip suction hood body 40 can realize the up and down lifting movement with the extension and retraction of the cylinder.

[0170] The dust collection hood body 40 also has a dust collection hole on its side. This hole is connected to the central dust collection device through a dust collection adapter 41 and a dust collection pipe. It is used to remove dust and debris generated during the PCB cutting process.

[0171] The sealing ring 43 is fixed above the chip suction cover body 40. When the PCB is being cut, the sealing ring 43 and the spindle 60 cooperate to seal, which reduces or eliminates the gap between the upper part of the pressure foot assembly and the spindle 60, thereby increasing the suction force below the pressure foot assembly.

[0172] The main body 10 is fixed below the chip suction hood body 40. The broken tool sensor 20 includes a transmitter 21 and a receiver 22. When the PCB board is being cut, the status of the tool on the spindle 60 can be detected in real time.

[0173] The pressure brush 42 is fixed below the main body 10 and is used to press the processing board during PCB processing. The inner side of the pressure brush 42 is provided with a sealing sleeve to seal the cutting chip area of ​​the tool and prevent a large amount of dust from splashing to other areas of the machine during PCB processing.

[0174] In some embodiments, the PCB processing equipment further includes a tool inspector disposed on the worktable.

[0175] Figure 17 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 17 As shown, the electronic device 17 of this embodiment includes: at least one processor 1700 ( Figure 17 (Only one is shown in the diagram), memory 1701, and computer program 1702 stored in said memory 1701 and executable on said at least one processor 1700, which, when executing said computer program 1702, implements the steps in any of the above method embodiments.

[0176] The electronic device may include, but is not limited to, a processor 1700 and a memory 1701. Those skilled in the art will understand that... Figure 17This is merely an example of electronic device 17 and does not constitute a limitation on electronic device 17. It may include more or fewer components than shown, or combine certain components, or different components, such as input / output devices, network access devices, etc.

[0177] The processor 1700 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0178] In some embodiments, the memory 1701 may be an internal storage unit of the electronic device 17, such as a hard disk or memory of the electronic device 17. In other embodiments, the memory 1701 may be an external storage device of the electronic device 17, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the electronic device 17. Furthermore, the memory 1701 may include both internal and external storage units of the electronic device 17. The memory 1701 is used to store the operating system, applications, bootloader, data, and other programs, such as the program code of the computer program. The memory 1701 can also be used to temporarily store data that has been output or will be output.

[0179] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0180] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying computer program code to a device / electronic device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks.

[0181] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0182] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0183] In the embodiments provided in this application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings or direct couplings or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0184] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0185] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for detecting broken blades, applied to PCB processing equipment, wherein the PCB processing equipment is equipped with a broken blade sensor and a dust detection device, characterized in that, The broken blade detection method includes: Obtain the current state of the tool, which includes machining state and non-machining state; When the cutting tool is in the machining state, the dust detection device detects whether the cutting tool is broken. When the tool is in the non-machining state, the tool breakage sensor detects whether the tool has broken.

2. The method for detecting broken blades according to claim 1, characterized in that, The step of detecting whether the cutting tool is broken using the dust detection device specifically includes: Dust signals are acquired through a dust detection device; If the dust signal is greater than the first dust threshold, it is determined that the tool is not broken. If the dust signal is less than or equal to the first dust threshold, it is determined that there is an abnormal event in the cutting tool, and the abnormal event indicates that there is a possibility of tool breakage.

3. The method for detecting broken blades according to claim 2, characterized in that, Following the step of determining that an abnormal event has occurred with the cutting tool, the method further includes: Control the cutting tool to stop machining; After the cutting tool stops machining, the tool breakage sensor detects whether the tool has broken.

4. The method for detecting broken blades according to claim 3, characterized in that, The PCB processing equipment is also equipped with a tool detector, which, after the step of detecting whether the tool is broken by the tool breakage sensor, further includes: If the tool breakage sensor detects that the tool is broken, the tool is controlled to move to the tool detector. When the tool is in the tool detector, the actual diameter and actual length of the tool are detected. If the actual cutting diameter does not match the standard cutting diameter of the tool, or the actual cutting length does not match the standard cutting length of the tool, then the tool is determined to be broken.

5. The method for detecting broken blades according to claim 3, characterized in that, The PCB processing equipment is also equipped with a tool detector, which, after the step of detecting whether the tool is broken by the tool breakage sensor, further includes: If the broken tool sensor detects that the tool is not broken, then the broken tool sensor is cleaned. If the tool is still not broken after cleaning, the tool is moved to the tool detector for tool breakage detection.

6. The method for detecting broken blades according to any one of claims 1 to 5, characterized in that, The broken blade detection method further includes: When the broken blade sensor issues an alarm signal, the broken blade sensor and / or the cleaning assembly are driven to move so that the cleaning assembly can clean the broken blade sensor.

7. The method for detecting broken tools according to any one of claims 1 to 5, characterized in that, The broken blade detection method further includes: If the tool is in the machining state and the dust detection device detects that the tool is not broken, and the tool is detected to be broken by the tool breakage sensor after machining is stopped, then it is detected whether the tool breakage sensor has shifted position relative to the tool. If the broken tool sensor does not shift position relative to the tool, the dust detection device is cleaned.

8. A broken knife detection structure, characterized in that, The broken blade detection structure includes: The main body, along a first direction, is provided with a through-hole that can accommodate the cutting tool, the first direction being the axial direction of the main body; A broken tool sensor is disposed on the main body, and the detection end of the broken tool sensor is exposed outside the clearance hole. The broken tool sensor can detect whether the tool is broken. A dust detection device is connected to the main body, and the dust detection device is connected to the clearance hole.

9. A dust collection hood, characterized in that, It includes a chip suction hood body and a broken blade detection structure as described in claim 8, wherein the broken blade detection structure is detachably connected to the chip suction hood body.

10. The dust collection hood according to claim 9, characterized in that, The dust collection hood body is provided with a dust collection channel, which is connected to an external dust collection device. The dust detection device is located between the dust collection device and the dust collection hood body. The dust collection channel is connected to the clearance hole and is located above the broken knife sensor.

11. A PCB processing equipment, characterized in that, Includes the broken blade detection structure as described in claim 8, or includes the chip suction hood as described in claim 9 or 10; The PCB processing equipment also includes a worktable and a cleaning component. The worktable is used to support the PCB, and the cleaning component is disposed on the worktable. The cleaning component and the broken tool detection structure can move relative to each other so that the cleaning component can clean the broken tool detection structure.

12. The PCB processing equipment according to claim 11, characterized in that, The cleaning assembly includes a cleaning head, the cleaning portion of which extends along the first direction.

13. The PCB processing equipment according to claim 11, the PCB processing equipment further includes a tool detector and a tool magazine assembly, wherein the tool detector and the tool magazine assembly are both disposed on the worktable.

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