Circuit board stepped hole depth control processing equipment and processing method

Abstract

The application discloses a circuit board stepped hole controlled deep processing equipment and a circuit board stepped hole processing method applying the same. The circuit board stepped hole controlled deep processing equipment comprises a processing device, and the processing device comprises a first drilling mechanism, a second drilling mechanism and a moving mechanism. The second drilling mechanism comprises a first lifting seat, a first cutter, a first motor and a position alignment assembly. The position alignment assembly comprises a first arm, a second arm, a first position detector, a second position detector and a position controller. The first position detector is used for detecting the axial position of a through hole. The second position detector is used for detecting the axial position of the first cutter. The position controller is used for controlling the moving mechanism to compensate for the position difference between the axial position of the first cutter and the axial position of the through hole. The circuit board stepped hole controlled deep processing equipment can improve the coaxiality of the through hole and the counterbore in the circuit board stepped hole, and improve the processing quality of the circuit board stepped hole.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board processing equipment, and in particular to circuit board step hole controlled deep processing equipment and a processing method. Background Art

[0002] A stepped hole in a circuit board is a special hole structure commonly found in multi-layer PCB designs. It can form holes of different diameters at different depths, thereby enabling connections between conductive layers in different layers.

[0003] The design of stepped holes can improve the wiring density of the circuit board and the flexibility of device installation, while also helping to improve reliability during soldering and connection.

[0004] A stepped hole usually consists of two or more cylindrical holes, forming a layered structure.

[0005] In the related art, the processing of stepped holes in a circuit board usually requires first using a small drill bit to drill a through hole in the circuit board, and then using a large drill bit to drill a countersink in the through hole.

[0006] However, the switching process between small drill bits and large drill bits is prone to position errors, which can easily lead to poor coaxiality between the through hole and the countersunk hole, affecting the processing quality of the stepped hole of the circuit board. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a circuit board stepped hole controlled deep processing device that can improve the coaxiality of the through hole and the countersunk hole, thereby improving the processing quality of the circuit board stepped hole.

[0008] The present invention also provides a circuit board stepped hole processing method using the above-mentioned circuit board stepped hole controlled deep processing equipment.

[0009] According to the first aspect of the present invention, a circuit board stepped hole controlled deep processing equipment comprises a machine body, a positioning carrier and a processing device, the machine body has an X direction and a Y direction perpendicular to each other in the horizontal direction and a vertical Z direction, and comprises a frame and a workbench; the positioning carrier is arranged on the workbench to support and position the circuit board; the processing device comprises a first drilling mechanism, a second drilling mechanism and a moving mechanism, the moving mechanism is arranged on the frame for translation along the X direction and the Y direction, the first drilling mechanism and the second drilling mechanism are arranged on the moving mechanism, the transfer mechanism is used to drive the first drilling mechanism and the second drilling mechanism to move alternately to the top of the positioning carrier, the first drilling mechanism is used to process through holes in the circuit board, and the second drilling mechanism is used to process countersunk holes on the through holes of the circuit board; the second drilling mechanism comprises a first lifting seat, a first tool, a first motor and a position alignment component, the first lifting seat is arranged on the moving mechanism, the first tool is rotatably arranged at the bottom of the first lifting seat, and the first motor is used to drive the The first tool rotates; the position alignment component is arranged on the first lifting seat, and the position alignment component is used to align the axis of the first tool with the axis of the through hole. The position alignment component includes a first arm that is slidable up and down with the first lifting seat, a second arm that is horizontally movable with the first arm, a first position detector arranged at the bottom of the second arm, a second position detector arranged at the top of the second arm, and a position controller. The first position detector is used to detect the axis position of the through hole, and the second position detector is used to detect the axis position of the first tool. The position controller is electrically connected to the first position detector and the second position detector. The position controller is electrically connected to the moving mechanism. The position controller is used to receive the detection signal of the first position detector and the detection signal of the second position detector and perform position signal comparison, and then control the moving mechanism to move the position of the first tool according to the position signal comparison result to compensate for the position difference between the axis position of the first tool and the axis position of the through hole.

[0010] According to some embodiments of the present invention, one end of the second arm is hinged to the first arm, and the first arm is also provided with a first power member that drives the second arm to swing horizontally. The first position detector and the second position detector are arranged at the other end of the second arm, and the second arm swings to drive the first position detector and the second position detector to move closer to and away from between the through hole and the first tool.

[0011] According to some embodiments of the present invention, the first arm includes a first seat portion, a vertical plate portion, and a horizontal plate portion connected in sequence, the first seat portion is connected to the first lifting seat in an up and down sliding manner, the top end of the vertical plate portion is connected to the first lifting seat, one side of the horizontal plate portion is connected to the bottom end of the vertical plate portion, and the other end of the horizontal plate portion is hinged to the second arm, the second arm is located below the horizontal plate portion, and the first power member is arranged above the horizontal plate portion.

[0012] According to some embodiments of the present invention, the processing device further includes an anti-shake mechanism, which is disposed on the first lifting seat and includes:

[0013] A lifting frame, slidably connected to the first lifting seat up and down;

[0014] a first spring, located between the bottom of the lifting frame and the first lifting seat, and used to press the lifting frame downward;

[0015] The guide member is connected to the bottom of the lifting frame, is sleeved on the outside of the first tool, and has a bottom end capable of abutting against the circuit board, and is used to guide and limit the first tool to prevent the first tool from shaking.

[0016] According to some embodiments of the present invention, the guide member is configured as a linear bearing.

[0017] According to some embodiments of the present invention, at least three pressure sensors are provided at the bottom of the guide member, and at least three pressure sensors are arranged equidistantly along the circumference of the first tool. A data processor is also included. The pressure sensors are electrically connected to the data processor. The pressure sensors are used to collect pressure data. The data processor is used to receive the pressure data of the pressure sensors and perform difference analysis on multiple pressure data. When the difference analysis result of the data processor is greater than the set value, the data processor determines that the circuit board clamping flatness is poor and issues an alarm.

[0018] According to some embodiments of the present invention, the first lifting seat has an upright first tube portion, the outer circumferential surface of the first tube portion has a first annular groove, the lifting frame has a first sleeve, the first sleeve is sleeved outside the first annular groove, the first annular groove has a first guide groove extending up and down, the inner side of the first sleeve has a guide protrusion, the guide protrusion cooperates with the first guide groove for guidance, the lower end of the first annular groove faces the first sleeve for limiting the position, the first spring is sleeved on the first annular groove, one end of the first spring abuts against the top end of the first sleeve, and the other end of the first spring abuts against the upper end surface of the first annular groove.

[0019] According to some embodiments of the present invention, the anti-shake mechanism further includes a lifting assembly, which is used to lift the lifting frame upward so that the guide member avoids the second position detector, and the lifting assembly includes:

[0020] A supporting arm, the supporting arm being used to support the bottom of the lifting frame;

[0021] The second power member is arranged on the first lifting seat and is used for driving the supporting arm to move up and down.

[0022] According to a second aspect of the present invention, a circuit board stepped hole processing method is provided, using the circuit board stepped hole controlled deep processing equipment described in the first aspect of the present invention. The circuit board stepped hole processing method includes:

[0023] In the through-hole processing step, the circuit board is clamped on the positioning carrier, and the moving mechanism drives the first drilling mechanism to move above the positioning carrier according to the set processing program, and the first drilling mechanism processes a through hole on the circuit board on the positioning carrier;

[0024] In the position compensation step, the moving mechanism drives the second drilling mechanism to move to the top of the through hole, the first arm moves downward to adjust the height of the first position detector and the second position detector to between the bottom end of the first tool and the top surface of the circuit board, and the second arm drives the first position detector and the second position detector to move between the bottom end of the first tool and the top surface of the circuit board. Then, the first arm moves downward to drive the first position detector to extend into the through hole, and the first position detector detects the through hole to obtain the horizontal coordinate value of the axis of the through hole. 、 Then, the first arm moves upward to drive the second position detector to detect the first tool. The second position detector detects the first tool to obtain the horizontal coordinate value of the axis of the first tool. 、 After receiving the detection position information from the first position detector and the second position detector, the position controller calculates the position difference of the axis of the first tool relative to the axis of the through hole along the X direction. , position difference along the Y direction , and The counting formula is as follows:

[0025] ;

[0026] ;

[0027] Position controller counts and The value of and The numerical control moving mechanism drives the second drilling mechanism to move along the X direction and the Y direction to compensate for the position difference between the axis position of the first tool and the axis position of the through hole. When the first detector and the second detector complete the position detection, the second arm drives the first detector and the second detector away from the first tool and the through hole, and then the first arm rises to drive the first detector and the second detector to rise.

[0028] In the countersink processing step, the first lifting platform descends to drive the first tool to process the countersink on the through hole.

[0029] According to some embodiments of the present invention, in the countersinking step, the bottom end of the guide member abuts against the circuit board during the lowering process of the first lifting seat, and at least three pressure sensors at the bottom of the guide member respectively collect pressure values ​​when the guide member abuts against the circuit board. , i is 1 to n, n is not less than 3, the data processor receives the pressure data collected by the pressure sensor and calculates to Correlation coefficient R;

[0030] ;

[0031] in, is the average pressure value of all pressure sensors;

[0032] When R is closer to 0, the correlation between the pressure values ​​of all pressure sensors is better, and the flatness of the circuit board when clamped on the positioning carrier is better. When R is greater than the set value, the data processor alarms;

[0033] When R is less than the set value, the circuit board step hole controlled deep processing equipment operates normally, and the guide member guides and limits the descending feed of the first tool.

[0034] A circuit board step hole control deep processing device according to an embodiment of the present invention has at least the following beneficial effects:

[0035] 1. The present invention provides a positioning carrier on the workbench, which is used to support and position the circuit board, thereby making the circuit board more stable on the processing equipment, avoiding the circuit board from shaking during processing by the processing equipment, and thus ensuring processing accuracy.

[0036] 2. The present invention sets up a processing device, which includes a first drilling mechanism, a second drilling mechanism and a moving mechanism. The moving mechanism is set on the frame for translation along the X direction and the Y direction. The first drilling mechanism and the second drilling mechanism are set on the moving mechanism. The transfer mechanism is used to drive the first drilling mechanism and the second drilling mechanism to move alternately to the top of the positioning carrier. The first drilling mechanism is used to process through holes in the circuit board, and the second drilling mechanism is used to process countersunk holes on the through holes of the circuit board. Therefore, the processing device can process through holes and countersunk holes on the circuit board in sequence, so that the through holes and the countersunk holes are combined to form stepped holes, thereby eliminating the need to use special tools to process the stepped holes in one go, thereby reducing the design cost and processing cost of the tool.

[0037] 3. The present invention arranges a position alignment component on the first lifting seat, and the position alignment component is used to align the axis of the first tool with the axis of the through hole. The position alignment component includes a first arm that is slidably arranged with the first lifting seat, a second arm that is horizontally movable with the first arm, a first position detector arranged at the bottom of the second arm, a second position detector arranged at the top of the second arm, and a position controller. The first position detector is used to detect the axis position of the through hole, and the second position detector is used to detect the axis position of the first tool. The position controller is electrically connected to the first position detector and the second position detector, and the position controller is electrically connected to the moving mechanism. The position controller is used to receive detection signals from the first position detector and the second position detector and perform position Signal comparison, and then the moving mechanism is controlled to move the position of the first tool according to the position signal comparison result to compensate for the position difference between the axial position of the first tool and the axial position of the through hole. It can be understood that after the first tool is moved into position, the first position detector and the second position detector respectively detect the axial position of the through hole and the first tool, and the position controller compares and analyzes the position difference data of the axial position of the first tool and the axial position of the through hole, and controls the moving mechanism to drive the first tool to move to compensate for the position difference. Then, the first tool processes the countersink on the circuit board, thereby eliminating the position error generated during the switching process of the first drilling mechanism and the second drilling mechanism, and then, improves the coaxiality of the through hole and the countersink, and improves the processing quality of the stepped hole of the circuit board.

[0038] 4. The present invention provides an anti-shake mechanism, which includes a lifting frame, a first spring and a guide member, so that when the first lifting seat is lowered for processing, the guide member can first abut against the circuit board, and then the first spring squeezes the guide member to press the circuit board. Then, the guide member can guide and limit the first tool to prevent the first tool from shaking when contacting the circuit board. At the same time, the installation of the guide member on the first tool can reduce the suspended part of the first tool, reduce the risk of the first tool being deformed by force during processing, and thus improve the processing quality of the countersink.

[0039] 5. The present invention is provided with at least 3 pressure sensors at the bottom of the guide member, and the at least 3 pressure sensors are arranged equidistantly along the circumference of the first tool. It also includes a data processor. The pressure sensor is electrically connected to the data processor. The pressure sensor is used to collect pressure data. The data processor is used to receive the pressure data of the pressure sensor and perform difference analysis on multiple pressure data. When the difference analysis result of the data processor is greater than the set value, the data processor determines that the flatness of the circuit board clamping is poor and alarms. It can be understood that before the first tool is processed, the pressure sensor and the data processor quickly detect the flatness of the circuit board clamping, which is convenient for judging and identifying poor processing of the circuit board, thereby facilitating the screening of defective products during the processing process, and being able to detect defects before all processing steps are completed, reducing the processing time of the processing equipment for defective products and improving production efficiency.

[0040] The present invention also provides a circuit board stepped hole processing method using the above-mentioned circuit board stepped hole controlled deep processing equipment, which has the above-mentioned beneficial effects.

[0041] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 This is a schematic structural diagram of a circuit board step hole controlled deep processing device according to an embodiment of the present invention;

[0044] Figure 2 This is a structural schematic diagram of another perspective of a circuit board step hole controlled deep processing equipment according to an embodiment of the present invention;

[0045] Figure 3 for Figure 1 A front view is shown;

[0046] Figure 4 for Figure 1 side view shown;

[0047] Figure 5 for Figure 1 An enlarged view of point A is shown;

[0048] Figure 6 for Figure 2 An enlarged view of point B is shown;

[0049] Figure 7 This is a process flow chart of a circuit board stepped hole processing method according to an embodiment of the present invention.

[0050] Figure markings: 100-frame, 110-workbench, 120-positioning carrier, 130-first drilling mechanism, 140-second drilling mechanism, 150-moving mechanism, 160-first lifting seat, 170-first tool, 180-first motor, 190-position alignment assembly, 200-first arm, 210-second arm, 220-first position detector, 230-second position detector, 240-first power member, 250-first seat, 260-vertical plate, 270-horizontal plate, 280-anti-shake mechanism, 290-lifting frame, 300-first spring, 310-guide member, 320-pressure sensor, 330-first pipe, 340-first ring groove, 350-first sleeve, 360-first guide groove, 370-guide protrusion, 380-upper support assembly, 390-support arm, 400-second power member. DETAILED DESCRIPTION

[0051] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0052] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. If a first or second is mentioned, this is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0054] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted, connected, and connected" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0055] The following describes a circuit board step hole controlled deep processing equipment and processing method according to an embodiment of the present invention with reference to the accompanying drawings.

[0056] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The present invention aims to provide an embodiment of a circuit board stepped hole controlled deep processing equipment.

[0057] For ease of explanation, Figure 1 The X direction, Y direction, and Z direction are indicated.

[0058] Structurally, a circuit board stepped hole controlled deep processing device of this embodiment includes a body, a positioning carrier 120 and a processing device.

[0059] The machine body has an X direction and a Y direction which are perpendicular to each other in the horizontal direction, and a Z direction which is vertical. The machine body includes a frame 100 and a workbench 110 .

[0060] The positioning carrier 120 is set on the workbench 110 and is used to support and position the circuit board, thereby making the circuit board more stable on the processing equipment, avoiding the circuit board from shaking during processing by the processing equipment, and thus ensuring processing accuracy.

[0061] It is understandable that the positioning carrier 120 can be configured as a fixture having a positioning groove matching the shape of the circuit board.

[0062] As for the processing device, the processing device includes a first drilling mechanism 130, a second drilling mechanism 140 and a moving mechanism 150. The moving mechanism 150 is arranged on the frame 100 for translation along the X direction and the Y direction. The first drilling mechanism 130 and the second drilling mechanism 140 are arranged on the moving mechanism 150. The transfer mechanism is used to drive the first drilling mechanism 130 and the second drilling mechanism 140 to move alternately to the top of the positioning carrier 120. The first drilling mechanism 130 is used to process through holes in the circuit board, and the second drilling mechanism 140 is used to process countersunk holes on the through holes of the circuit board. Therefore, it is convenient for the processing device to process through holes and countersunk holes on the circuit board in sequence, so that the through holes and countersunk holes are combined to form stepped holes, thereby eliminating the need to use special tools to process the stepped holes in one go, thereby reducing the design cost and processing cost of the tool.

[0063] As for the moving mechanism 150, the moving mechanism 150 includes a mounting arm, a first moving component connected to the frame 100 and moving in one of the X direction and the Y direction, and a second moving component connected to the first moving component and moving in the other of the X direction and the Y direction. The mounting arm is set on the second moving component, and the first drilling mechanism 130 and the second drilling mechanism 140 are set on the mounting arm.

[0064] The first drilling mechanism 130 may include a second lifting seat, a second tool and a second motor. The second lifting seat is disposed on the moving mechanism 150 . The second tool is rotatably disposed at the bottom of the second lifting seat. The second motor is used to drive the second tool to rotate.

[0065] Reference Figure 1 、 Figure 2 、 Figure 5 and Figure 6As for the second drilling mechanism 140, the second drilling mechanism 140 includes a first lifting seat 160, a first tool 170, a first motor 180 and a position alignment component 190. The first lifting seat 160 is set on the moving mechanism 150, and the first tool 170 is rotatably set at the bottom of the first lifting seat 160. The first motor 180 is used to drive the first tool 170 to rotate; the position alignment component 190 is set on the first lifting seat 160. The position alignment component 190 is used to align the axis of the first tool 170 with the axis of the through hole. The position alignment component 190 includes a first arm 200 that is slidable up and down with the first lifting seat 160, a second arm 210 that is horizontally movable with the first arm 200, and a first arm 210 that is set at the bottom of the second arm 210. A detector 220, a second position detector 230 arranged on the top of the second arm 210 and a position controller, the first position detector 220 is used to detect the axial position of the through hole, the second position detector 230 is used to detect the axial position of the first tool 170, the position controller is electrically connected to the first position detector 220 and the second position detector 230, the position controller is electrically connected to the moving mechanism 150, the position controller is used to receive the detection signal of the first position detector 220 and the detection signal of the second position detector 230 and perform position signal comparison, and then control the moving mechanism 150 to move the position of the first tool 170 according to the position signal comparison result to compensate for the position difference between the axial position of the first tool 170 and the axial position of the through hole.

[0066] It can be understood that after the first tool 170 moves into position, the first position detector 220 and the second position detector 230 respectively detect the axial position of the through hole and the first tool 170, and the position controller compares and analyzes the position difference data between the axial position of the first tool 170 and the axial position of the through hole, and controls the moving mechanism 150 to drive the first tool 170 to move to compensate for the position difference. Then, the first tool 170 processes the countersink on the circuit board, thereby eliminating the position error generated during the switching process of the first drilling mechanism 130 and the second drilling mechanism 140, and then improving the coaxiality of the through hole and the countersink, thereby improving the processing quality of the stepped hole of the circuit board.

[0067] In some specific embodiments, one end of the second arm 210 can be hinged to the first arm 200, and the first arm 200 is further provided with a first power member 240 for driving the second arm 210 to swing horizontally. The first position detector 220 and the second position detector 230 are provided at the other end of the second arm 210, and the second arm 210 swings to drive the first position detector 220 and the second position detector 230 to move closer to and away from between the through hole and the first tool 170.

[0068] It can be understood that by hingedly connecting the second arm 210 to the first arm 200, the second arm 210 swings to drive the first position detector 220 and the second position detector 230 to move closer to and away from between the through hole and the first tool 170, so that the first power member 240 can be not arranged in the moving direction of the second arm 210, thereby reducing the occupied area of ​​the position alignment component 190 in the moving direction of the second arm 210, and further, making the structure of the position alignment component 190 more compact and occupying a smaller area.

[0069] Specifically, the first power member 240 may be configured as a motor.

[0070] In some specific embodiments, the first arm 200 can include a first seat portion 250, a vertical plate portion 260 and a horizontal plate portion 270 connected in sequence, the first seat portion 250 is connected to the first lifting seat 160 for sliding up and down, the top of the vertical plate portion 260 is connected to the first lifting seat 160, one side of the horizontal plate portion 270 is connected to the bottom end of the vertical plate portion 260, and the other end of the horizontal plate portion 270 is hinged to the second arm 210. The second arm 210 is located below the horizontal plate portion 270, and the first power member 240 is arranged above the horizontal plate portion 270.

[0071] It can be understood that by providing a horizontal plate portion 270 at the bottom end of the vertical plate portion 260, the horizontal plate portion 270 is hinged to the second arm 210 at one end away from the vertical plate portion 260, and the second arm 210 is located below the horizontal plate portion 270. The first power member 240 is provided above the horizontal plate portion 270, so that the vertical plate portion 260 can avoid the upper part of the hinge center between the second arm 210 and the first arm 200, so that the first power member 240 can be arranged above the second arm 210, thereby avoiding the first power member 240 from colliding with the circuit board when the position alignment component 190 descends.

[0072] Continue to refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 6 In some specific embodiments, the processing device may further include an anti-shake mechanism 280, which is arranged on the first lifting seat 160. The anti-shake mechanism 280 includes a lifting frame 290, a first spring 300 and a guide member 310. The lifting frame 290 is connected to the first lifting seat 160 for vertical sliding movement; the first spring 300 is located between the bottom of the lifting frame 290 and the first lifting seat 160, and the first spring 300 is used to press the lifting frame 290 downward; the guide member 310 is connected to the bottom of the lifting frame 290, and the guide member 310 is sleeved outside the first tool 170. The bottom end of the guide member 310 can abut against the circuit board, and the guide member 310 is used to guide and limit the first tool 170 to prevent the first tool 170 from shaking.

[0073] It can be understood that by setting up the anti-shake mechanism 280, the anti-shake mechanism 280 includes a lifting frame 290, a first spring 300 and a guide member 310, so that when the first lifting seat 160 is lowered for processing, the guide member 310 can first abut the circuit board, and then the first spring 300 squeezes the guide member 310 to press the circuit board, and then the guide member 310 can guide and limit the first tool 170 to prevent the first tool 170 from shaking when contacting the circuit board. At the same time, the installation of the guide member 310 on the first tool 170 can reduce the suspended part of the first tool 170, reduce the risk of the first tool 170 being deformed by force during processing, and thus improve the processing quality of the countersink.

[0074] In addition, conventional circuit board stepped holes usually require a cover plate on the top surface of the circuit board before drilling. When the drill bit drills a hole in the circuit board, the drill bit first passes through the cover plate and then drills a hole in the circuit board. On the one hand, the cover plate can guide and fix the drill bit to reduce the shaking of the drill bit. On the other hand, the cover plate can reduce burrs and unevenness of the hole during drilling, thereby improving the accuracy and quality of the hole. In this embodiment, by providing an anti-shake mechanism 280, the guide member 310 can replace the cover plate to achieve the effect of guiding and fixing the drilling and reducing burrs and unevenness of the hole during drilling, thereby eliminating the need for a cover plate on the top surface of the circuit board, thereby improving production efficiency and reducing consumables costs.

[0075] In some specific embodiments, the guide member 310 is configured as a linear bearing, which is beneficial to reducing the friction between the guide member 310 and the first tool 170, reducing the wear of the guide member 310 and the first tool 170, and increasing the service life of the guide member 310 and the first tool 170.

[0076] In some specific embodiments, the first tool 170 can be configured as a flat-bottom milling cutter, so that the bottom wall of the countersunk hole machined by the first tool 170 is flat, thereby facilitating the installation of components on the stepped hole support circuit board.

[0077] It is understandable that conventional processing equipment usually uses a drill bit with a tapered bottom surface to ensure the smoothness of the tool feed when processing countersinks. The tapered bottom surface of the drill bit can provide a guide for the tool during tool feed, making the tool feed more stable and the processed countersinks more accurate. However, the bottom wall of the countersink processed by the drill bit with a taper on the opposite side will have a taper corresponding to the bottom surface of the drill bit, which is not conducive to the installation of components on the circuit board through the stepped hole. In this embodiment, a guide member 310 is provided, and the guide member 310 can guide the first tool 170 when the first tool 170 is fed, thereby enhancing the stability of the first tool 170 during feeding and eliminating the need to set a taper on the bottom surface of the first tool 170 to guide the first tool 170. Furthermore, the first tool 170 can process a countersink with a flat bottom wall, which is convenient for the installation of components on the circuit board supported by the stepped hole.

[0078] In some specific embodiments, at least three pressure sensors 320 can be provided at the bottom of the guide member 310, and the at least three pressure sensors 320 are arranged equidistantly along the circumference of the first tool 170. A data processor is also included. The pressure sensor 320 is electrically connected to the data processor. The pressure sensor 320 is used to collect pressure data. The data processor is used to receive the pressure data of the pressure sensor 320 and perform difference analysis on multiple pressure data. When the difference analysis result of the data processor is greater than the set value, the data processor determines that the circuit board clamping flatness is poor and issues an alarm.

[0079] It can be understood that before the first tool 170 is processed, the pressure sensor 320 and the data processor quickly detect the flatness of the circuit board clamping, which is convenient for judging and identifying the poor processing of the circuit board, thereby facilitating the screening out of defective products during the processing process, and being able to detect defects before all processing steps are completed, thereby reducing the processing time of the processing equipment for defective products and improving production efficiency.

[0080] In some specific embodiments, the first lifting seat 160 can have an upright first tube portion 330, the outer circumferential surface of the first tube portion 330 has a first annular groove 340, the lifting frame 290 has a first sleeve 350, the first sleeve 350 is sleeved outside the first annular groove 340, the first annular groove 340 has a first guide groove 360 ​​extending up and down, the inner side of the first sleeve 350 has a guide protrusion 370, the guide protrusion 370 cooperates with the first guide groove 360 ​​for guidance, the lower end of the first annular groove 340 faces the first sleeve 350 for limiting the position, the first spring 300 is sleeved on the first annular groove 340, one end of the first spring 300 abuts against the top end of the first sleeve 350, and the other end of the first spring 300 abuts against the upper end surface of the first annular groove 340.

[0081] It can be understood that by providing an upright first tube portion 330 on the first lifting seat 160, providing a first annular groove 340 on the outer circumferential surface of the first tube portion 330, and providing a first sleeve 350 on the lifting frame 290, the first sleeve 350 is sleeved outside the first annular groove 340, so that the first sleeve 350 cooperates with the first annular groove 340 to limit the horizontal movement of the lifting frame 290 relative to the first lifting seat 160, so that the horizontal position of the lifting frame 290 relative to the first lifting seat 160 is more stable. At the same time, the upper end surface of the first annular groove 340 can limit the first sleeve 350, prevent the first sleeve 350 from being separated from the first annular groove 340, and limit the downward position of the lifting frame 290 relative to the first lifting seat 160 The first sleeve 350 is provided with a first guide groove 360 ​​which extends vertically therefrom. The first guide groove 360 ​​is provided with a guide protrusion 370 on the inner side of the first sleeve 350. The guide protrusion 370 cooperates with the first guide groove 360 ​​for guiding, thereby preventing the first sleeve 350 from rotating relative to the first guide groove 340.

[0082] In some specific embodiments, a displacement sensor may be provided on the lifting frame 290 , and the displacement sensor is electrically connected to the first lifting seat 160 . The displacement sensor is used to detect the relative height displacement distance between the lifting frame 290 and the first lifting seat 160 and control the descending distance of the first lifting seat 160 .

[0083] It can be understood that when the guide member 310 abuts the circuit board, the guide member 310 can drive the lifting frame 290 and the first lifting seat 160 to produce relative displacement in the height direction. Since the relative height of the bottom surface of the guide member 310 and the bottom surface of the first tool 170 is fixed, by detecting the relative height displacement distance between the lifting frame 290 and the first lifting seat 160, the depth of the countersink processed by the first tool 170 on the circuit board can be monitored in real time, thereby eliminating the assembly height error of the circuit board and the thickness difference of the circuit board itself, and thus making the countersink depth of the stepped hole more accurate.

[0084] In some specific embodiments, the anti-shake mechanism 280 may further include an upper supporting assembly 380, which is used to lift the lifting frame 290 upward so that the guide member 310 avoids the second position detector 230. The upper supporting assembly 380 includes a supporting arm 390 and a second power member 400. The supporting arm 390 is used to support the bottom of the lifting frame 290. The second power member 400 is arranged on the first lifting seat 160, and the second power member 400 is used to drive the supporting arm 390 to move up and down.

[0085] It can be understood that when the first tool 170 is not processing the circuit board, the first spring 300 will drive the guide member 310 to cover the first tool 170. By setting the upper support assembly 380, when the second power member 400 drives the support arm 390 to rise, the support arm 390 can support the lifting frame 290 to move upward, so that the guide member 310 can expose the first tool 170 after moving upward synchronously, thereby making it convenient to avoid the second position detector 230, so that the second position detector 230 can detect the axial position of the first tool 170. It should be explained that since the support arm 390 only supports the lifting frame 290 and is not fixedly connected to the lifting frame 290, when the support arm 390 is at the lowest position, the support arm 390 can be separated from the lifting frame 290, so that the support arm 390 will not interfere with the lifting of the lifting frame 290.

[0086] Specifically, the second power member 400 can be configured as a pneumatic cylinder or an oil cylinder.

[0087] Reference Figure 7 An embodiment of the present invention also provides a circuit board stepped hole processing method, using the above-mentioned circuit board stepped hole controlled deep processing equipment, the circuit board stepped hole processing method includes a through processing step, a position compensation step and a countersink processing step.

[0088] In the through-hole processing step, the circuit board is clamped on the positioning carrier 120, and the moving mechanism 150 drives the first drilling mechanism 130 to move above the positioning carrier 120 according to the set processing program. The first drilling mechanism 130 processes a through hole on the circuit board on the positioning carrier 120.

[0089] In the position compensation step, the moving mechanism 150 drives the second drilling mechanism 140 to move above the through hole, and the first arm 200 moves downward to adjust the height of the first position detector 220 and the second position detector 230 to between the bottom end of the first tool 170 and the top surface of the circuit board. The second arm 210 drives the first position detector 220 and the second position detector 230 to move between the bottom end of the first tool 170 and the top surface of the circuit board. Then, the first arm 200 moves downward to drive the first position detector 220 to extend into the through hole. The first position detector 220 detects the through hole to obtain the horizontal coordinate value of the axis of the through hole. 、 Then, the first arm 200 moves upward to drive the second position detector 230 to detect the first tool 170. The second position detector 230 detects the first tool 170 to obtain the horizontal coordinate value of the axis of the first tool 170. 、 After receiving the detection position information from the first position detector 220 and the second position detector 230, the position controller calculates the position difference of the axis of the first tool 170 relative to the axis of the through hole along the X direction. , position difference along the Y direction , and The counting formula is as follows:

[0090] ;

[0091] ;

[0092] Position controller counts and The value of and The numerical control moving mechanism 150 drives the second drilling mechanism 140 to move along the X direction and the Y direction to compensate for the position difference between the axial position of the first tool 170 and the axial position of the through hole. When the first detector and the second detector complete the position detection, the second arm 210 drives the first detector and the second detector away from the first tool 170 and the through hole, and then the first arm 200 rises to drive the first detector and the second detector to rise.

[0093] It can be understood that after the first tool 170 moves into position, the first position detector 220 and the second position detector 230 respectively detect the axial position of the through hole and the first tool 170, and the position controller compares and analyzes the position difference data between the axial position of the first tool 170 and the axial position of the through hole, and controls the moving mechanism 150 to drive the first tool 170 to move to compensate for the position difference. Then, the first tool 170 processes the countersink on the circuit board, thereby eliminating the position error generated during the switching process of the first drilling mechanism and the second drilling mechanism, and then improving the coaxiality of the through hole and the countersink, thereby improving the processing quality of the stepped hole of the circuit board.

[0094] The detection and acquisition method for the first position detector 220 to detect the axial position of the through hole and the second position detector 230 to detect the axial position of the first tool 170 can be a method of obtaining the three-point positions of the inner wall of the through hole or the three-point positions of the outer wall of the first tool 170 and then obtaining the axial position through mathematical calculation, or a method of obtaining the Z-direction projection image of the through hole or the first tool 170 by taking pictures and then obtaining the axial position through image parameterization.

[0095] In some specific embodiments, the second position detector 230 obtains the positions of three points on the outer wall of the first tool 170 and obtains the axis position through mathematical calculation.

[0096] Specifically, the three position coordinates of the outer wall of the first tool 170 obtained by the second position detector 230 are A( , )、B( , )、C( , ), assume that the axis position coordinates of the first tool 170 is O (h, k);

[0097] The axis position coordinates of the first tool 170 are obtained by solving the following equations:

[0098] ;

[0099] ;

[0100] ;

[0101] Where r is the radius of the first tool 170;

[0102] After calculation and solution, the result can be obtained:

[0103] ;

[0104] .

[0105] Furthermore, for the detection and acquisition method of the axial position of the through hole by the first position detector 220, the first position detector 220 also obtains the three-point position of the inner wall of the through hole, and obtains the axis position through mathematical calculation. The specific calculation method can refer to the calculation method of the position coordinates of the axis of the above-mentioned first tool.

[0106] In the countersinking process, the first lifting platform 160 descends to drive the first tool 170 to process the countersink on the through hole.

[0107] In some specific embodiments, during the countersinking process, the bottom end of the guide member 310 abuts against the circuit board during the descent of the first lifting seat 160, and at least three pressure sensors 320 at the bottom of the guide member 310 respectively collect pressure values ​​when the guide member 310 abuts against the circuit board. , i is 1 to n, n is not less than 3, the data processor receives the pressure data collected by the pressure sensor 320 and calculates to Correlation coefficient R;

[0108] ;

[0109] in, is the average value of the pressure values ​​of all the pressure sensors 320; when R is closer to 0, the better the correlation of the pressure values ​​of all the pressure sensors 320, and the better the flatness of the circuit board when clamped on the positioning carrier 120. When R is greater than the set value, the data processor alarms; when R is less than the set value, the circuit board step hole controlled deep processing equipment operates normally, and the guide part 310 guides and limits the descending feed of the first tool 170.

[0110] It can be understood that before the first tool 170 is processed, the pressure sensor 320 and the data processor quickly detect the flatness of the circuit board clamping, which is convenient for judging and identifying the poor processing of the circuit board, thereby facilitating the screening out of defective products during the processing process, and being able to detect defects before all processing steps are completed, thereby reducing the processing time of the processing equipment for defective products and improving production efficiency.

[0111] In some specific embodiments, the first lifting platform 160 drives the first tool 170 and the anti-shake mechanism 280 to move downward. After the guide member 310 abuts the circuit board, the displacement sensor begins to detect and record the height displacement distance data of the lifting frame 290 relative to the first lifting platform 160. When the displacement distance data detected by the displacement sensor is the same as the set displacement distance data for stopping feeding, the displacement sensor controls the first lifting platform 160 to stop descending.

[0112] It can be understood that in the countersink processing step, after the guide member 310 abuts the circuit board, the guide member 310 can drive the lifting frame 290 and the first lifting seat 160 to produce relative displacement in the height direction. Since the relative height of the bottom surface of the guide member 310 and the bottom surface of the first tool 170 is fixed, by detecting the relative height displacement distance between the lifting frame 290 and the first lifting seat 160, the countersink depth processed by the first tool 170 on the circuit board can be monitored in real time, thereby eliminating the assembly height error of the circuit board and the thickness difference of the circuit board itself, and thus making the countersink depth of the stepped hole more accurate.

[0113] Throughout this specification, references to terms such as "one embodiment, some embodiments, exemplary embodiments, examples, specific examples, or some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0114] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A circuit board step hole control deep processing equipment, characterized in that: include: The machine body has an X direction and a Y direction perpendicular to each other in the horizontal direction and a Z direction perpendicular to each other, and includes a frame (100) and a workbench (110); A positioning carrier (120), arranged on the workbench (110), and used for supporting and positioning the circuit board; A processing device, comprising a first drilling mechanism (130), a second drilling mechanism (140) and a moving mechanism (150), wherein the moving mechanism (150) is arranged on the frame (100) for translation along the X direction and the Y direction, the first drilling mechanism (130) and the second drilling mechanism (140) are arranged on the moving mechanism (150), and the moving mechanism (150) is used to drive the first drilling mechanism (130) and the second drilling mechanism (140) to move alternately to above the positioning carrier (120), the first drilling mechanism (130) is used to process through holes in a circuit board, and the second drilling mechanism (140) is used to process countersunk holes in the through holes of the circuit board; The second drilling mechanism (140) comprises a first lifting seat (160), a first tool (170), a first motor (180) and a position alignment component (190); the first lifting seat (160) is arranged on the moving mechanism (150); the first tool (170) is rotatably arranged at the bottom of the first lifting seat (160); and the first motor (180) is used to drive the first tool (170) to rotate; The position alignment component (190) is arranged on the first lifting seat (160), and the position alignment component (190) is used to align the axis of the first tool (170) with the axis of the through hole. The position alignment component (190) includes a first arm (200) that is slidably arranged up and down with the first lifting seat (160), a second arm (210) that is horizontally movable with the first arm (200), a first position detector (220) arranged at the bottom of the second arm (210), a second position detector (230) arranged at the top of the second arm (210), and a position controller. The first position detector (220) is used to detect the axis position of the through hole. The second position detector (230) is used to detect the axial position of the first tool (170), the position controller is electrically connected to the first position detector (220) and the second position detector (230), the position controller is electrically connected to the moving mechanism (150), the position controller is used to receive the detection signal of the first position detector (220) and the detection signal of the second position detector (230) and perform position signal comparison, and then control the moving mechanism (150) to move the position of the first tool (170) according to the position signal comparison result to compensate for the position difference between the axial position of the first tool (170) and the axial position of the through hole; The processing device further comprises an anti-shake mechanism (280), wherein the anti-shake mechanism (280) is arranged on the first lifting seat (160), and the anti-shake mechanism (280) comprises: A lifting frame (290) is connected to the first lifting seat (160) in an up-and-down sliding manner; a first spring (300), located between the bottom of the lifting frame (290) and the first lifting seat (160), and used to press the lifting frame (290) downward; A guide member (310) is connected to the bottom of the lifting frame (290), is sleeved outside the first tool (170), and has a bottom end capable of abutting against a circuit board, and is used to guide and limit the first tool (170) to prevent the first tool (170) from shaking.

2. The circuit board step hole control deep processing equipment according to claim 1, characterized in that: One end of the second arm (210) is hinged to the first arm (200), and the first arm (200) is further provided with a first power member (240) for driving the second arm (210) to swing horizontally. The first position detector (220) and the second position detector (230) are provided at the other end of the second arm (210), and the second arm (210) swings to drive the first position detector (220) and the second position detector (230) to move closer to and away from between the through hole and the first tool (170).

3. The circuit board step hole control deep processing equipment according to claim 2, characterized in that: The first arm (200) includes a first seat portion (250), a vertical plate portion (260) and a horizontal plate portion (270) connected in sequence, the first seat portion (250) is connected to the first lifting seat (160) in an up and down sliding manner, the top of the vertical plate portion (260) is connected to the first lifting seat (160), one side of the horizontal plate portion (270) is connected to the bottom end of the vertical plate portion (260), the other end of the horizontal plate portion (270) is hinged to the second arm (210), the second arm (210) is located below the horizontal plate portion (270), and the first power member (240) is arranged above the horizontal plate portion (270).

4. The circuit board step hole control deep processing equipment according to claim 1, characterized in that: The guide member (310) is configured as a linear bearing.

5. The circuit board step hole control deep processing equipment according to claim 1, characterized in that: At least three pressure sensors (320) are provided at the bottom of the guide member (310), and the at least three pressure sensors (320) are arranged equidistantly along the circumference of the first tool (170). The guide member (310) also includes a data processor, the pressure sensor (320) is electrically connected to the data processor, the pressure sensor (320) is used to collect pressure data, and the data processor is used to receive the pressure data of the pressure sensor (320) and perform difference analysis on multiple pressure data. When the difference analysis result of the data processor is greater than a set value, the data processor determines that the clamping flatness of the circuit board is poor and issues an alarm.

6. The circuit board step hole control deep processing equipment according to claim 1, characterized in that: The first lifting seat (160) has an upright first tube portion (330), the outer peripheral surface of the first tube portion (330) has a first annular groove (340), the lifting frame (290) has a first sleeve (350), the first sleeve (350) is sleeved outside the first annular groove (340), the first annular groove (340) has a first guide groove (360) extending up and down, the inner side of the first sleeve (350) has a guide protrusion (370), the guide protrusion (370) cooperates with the first guide groove (360) for guidance, the lower end of the first annular groove (340) faces the first sleeve (350) for limiting, the first spring (300) is sleeved on the first annular groove (340), one end of the first spring (300) abuts against the top end of the first sleeve (350), and the other end of the first spring (300) abuts against the upper end surface of the first annular groove (340).

7. The circuit board step hole control deep processing equipment according to claim 1, characterized in that: The anti-shake mechanism (280) further includes an upper supporting assembly (380), the upper supporting assembly (380) being used to lift the lifting frame (290) upwards so that the guide member (310) avoids the second position detector (230), the upper supporting assembly (380) including: A supporting arm (390), the supporting arm (390) being used to support the bottom of the lifting frame (290); The second power member (400) is arranged on the first lifting seat (160) and is used to drive the supporting arm (390) to move up and down.

8. A method for processing a stepped hole in a circuit board, using the circuit board stepped hole controlled deep processing equipment according to any one of claims 1 to 7, characterized in that: The circuit board stepped hole processing method comprises: In a through-hole processing step, the circuit board is clamped on the positioning carrier (120), the moving mechanism (150) drives the first drilling mechanism (130) to move above the positioning carrier (120) according to a set processing program, and the first drilling mechanism (130) processes a through hole on the circuit board on the positioning carrier (120); Position compensation step, the moving mechanism (150) drives the second drilling mechanism (140) to move to the top of the through hole, the first arm (200) moves downward to adjust the height of the first position detector (220) and the second position detector (230) to between the bottom end of the first tool (170) and the top surface of the circuit board, the second arm (210) drives the first position detector (220) and the second position detector (230) to move between the bottom end of the first tool (170) and the top surface of the circuit board, then, the first arm (200) moves downward to drive the first position detector (220) to extend into the through hole, and the first position detector (220) detects the through hole to obtain the horizontal coordinate value of the axis of the through hole 、 Then, the first arm (200) moves upward to drive the second position detector (230) to detect the first tool (170), and the second position detector (230) detects the first tool (170) to obtain the horizontal coordinate value of the axis of the first tool (170). 、 After receiving the detection position information from the first position detector (220) and the second position detector (230), the position controller calculates the position difference between the axis of the first tool (170) and the axis of the through hole along the X direction. , position difference along the Y direction , and The counting formula is as follows: ； ； Position controller counts and The value of and The numerical control moving mechanism (150) drives the second drilling mechanism (140) to move along the X direction and the Y direction to compensate for the position difference between the axis position of the first tool (170) and the axis position of the through hole. After the first detector and the second detector complete the position detection, the second arm (210) drives the first detector and the second detector away from the first tool (170) and the through hole, and then the first arm (200) rises to drive the first detector and the second detector to rise. In the countersink processing step, the first lifting seat (160) descends to drive the first tool (170) to process the countersink on the through hole.

9. A method for machining a stepped hole in a circuit board according to claim 8, characterized in that: In the countersinking process, the bottom end of the guide member (310) abuts against the circuit board during the descending process of the first lifting seat (160), and at least three pressure sensors (320) at the bottom of the guide member (310) respectively collect pressure values ​​when the guide member (310) abuts against the circuit board. , i is 1 to n, n is not less than 3, the data processor receives the pressure data collected by the pressure sensor (320) and calculates to Correlation coefficient R; ; in, is the average value of the pressure values ​​of all pressure sensors (320); When R is closer to 0, the correlation of the pressure values ​​of all the pressure sensors (320) is better, and the flatness of the circuit board when clamped on the positioning carrier (120) is better. When R is greater than a set value, the data processor alarms; When R is less than a set value, the circuit board step hole controlled deep processing equipment operates normally, and the guide member (310) guides and limits the downward feeding of the first tool (170).

Images