CN101706256B - Full-automatic quality detection device of micro drill point for drilling PCB - Google Patents

Abstract

A fully automatic quality inspection device for micro-drills for PCB board drilling in the field of tool detection technology, including: a feeding mechanism, a rotary table, a micro-drilling rotating mechanism, a height adjustment mechanism, a visual inspection device, and a feeding mechanism, wherein: The feeding mechanism, rotary table and unloading mechanism are respectively arranged on the working platform for the loading station, rotating station and unloading station. On the side of the working platform, the visual detection device is set at the visual detection station of the working platform, the loading station and the rotating station are located on the same side, the unloading station and the loading station are located The material station is located on the same side. The micro-drill rotation and height adjustment mechanism of the present invention can enable the micro-drill to simultaneously realize circumferential rotation and real-time precision adjustment of the axial direction, can fine-tune the axial positioning height of the micro-drill in real time, and ensures the imaging quality of the blade surface and the measurement accuracy of geometric parameters.

Description

Fully automatic quality inspection device for micro-drilling needles for PCB board drilling

technical field

The invention relates to a device in the technical field of tool detection, in particular to a fully automatic quality detection device for a miniature drill for PCB board drilling.

Background technique

For the detection of the quality of micro-drills, the traditional methods mostly rely on human eyes to observe the measurement results to judge whether the micro-drills are qualified. These detection methods are labor-intensive, and the detection personnel are prone to misjudgment due to fatigue, and are highly dependent on experience.

After searching the literature of the prior art, it is found that the Chinese patent document number CN2559963Y records a "special micro-drill inspection device for PCB board drilling", which uses a microscopic device and its adjustment mechanism to enlarge the image of the micro-drill and display it on the display. , the user completes the inspection based on the micro-drill image. For the microscopic device of this micro-drilling detection instrument, when adjusting the focal length, the operator must manually adjust a plurality of positioning buttons, which is not easy to be precise. In addition, the user must operate manually to place the micro-drill to be inspected at the inspection position.

It was also found through retrieval that the Chinese Patent Document No. CN1619256A has recorded a "omnidirectional automatic adjustment device and feeding device for a micro-drill inspection instrument for circuit board drilling". Controlled slide rail device. The micro-drilling detection device in the patent is operated by the servo motor to control the slide rail device according to the program regardless of the movement on the X, Y, and Z axes. The operator only needs to observe the enlarged image on the display without manual operation. Adjusting the position of the micro-drill and the position of the photographic lens of the micro-device increases the inspection efficiency. But the disadvantage is: due to structural reasons, during the inspection process, especially during the automatic feeding and receiving process, the micro-drilling tip is prone to breakage or shock, and the stability needs to be improved; secondly, the device does not use automatic feeding When the device is installed, the side and edge surface of the micro-drill can be detected at the same time, but the detection efficiency is low, and the micro-drill still needs to be replaced by manual operation; after the device is equipped with an automatic feeding device, although the degree of automation is further improved, only the edge of the micro-drill is Surface detection, the two cannot be taken into account. In addition, the device has a weak sorting function for the quality of micro-drills, and further sorting is required manually.

Contents of the invention

Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a fully automatic quality inspection device for micro-drills for PCB board drilling, which realizes independent detection of circuit boards by four stations in an unmanned operation environment.

The present invention is achieved through the following technical proposals. The present invention includes: a feeding mechanism, a rotary table, a micro-drilling rotary mechanism, a height adjustment mechanism, a side measurement mechanism, a blade surface measurement mechanism and a blanking mechanism, wherein: the rotary table is set On the working platform, the loading mechanism and the unloading mechanism are respectively arranged at the loading position and the unloading position of the rotary table. The measuring mechanism and the blade surface measuring mechanism are respectively arranged at the corresponding visual inspection positions of the working platform.

The feeding mechanism includes: a feeding manipulator, a feeding linear guide rail and a feeding tray part, wherein: the feeding linear guide rail is set on the working platform, the feeding manipulator is set on the feeding linear guide rail, and the feeding tray part is set On the working platform, the feeding linear guide rail and the feeding tray components are arranged orthogonally.

The unloading mechanism includes: a material receiving manipulator, a material receiving linear guide, a good product receiving tray part and a defective product receiving tray part, wherein: the material receiving linear guide is arranged on the working platform and is perpendicular to the feeding mechanism, and the receiving The material manipulator is set on the receiving linear guide rail, and the good product receiving tray part and the defective product receiving tray part are arranged on the working platform.

The feeding manipulator and the receiving manipulator are three-degree-of-freedom pneumatic grippers, which can move back and forth along the motion axis in a straight line, and can move vertically to the motion axis. Grab and place to realize loading and unloading actions.

The micro-drilling rotating mechanism includes: motor, cylinder, synchronous pulley and friction wheel, wherein: the output shaft of the motor is coaxially connected with the synchronous pulley, the coaxial pulley is meshed with the friction wheel, and the cylinder is arranged on the side frame and connected to the The sliding table is connected, and the cylinder rod controls the friction wheel to approach or stay away from the micro drill through the sliding table.

The height adjustment mechanism includes: a motor, a precision screw assembly and a nut bracket, wherein: the output shaft of the motor is coaxially connected with the precision ball screw assembly, and the nut bracket is arranged on the screw nut and connected with the micro-drill rotation mechanism.

The rotary table includes: a servo motor, a synchronous belt, a micro-drill pneumatic clamping mechanism and an indexing rotary platform, wherein: the micro-drill pneumatic clamping mechanism is arranged at the blanking position of the rotary table, and the servo motor is arranged on the working platform Below, the indexing rotary platform is set on the working platform, and the synchronous belt is respectively connected to the servo motor and the indexing rotary platform to realize station conversion.

The micro-drill pneumatic clamping mechanism includes: a clamping cylinder, a guide rod, a station contact, a pressure wheel, a clamper, a stand, an angle frame and a spring, wherein the clamping cylinder is arranged on the Angle frame, the two ends of the guide rod are respectively connected with the clamping cylinder and the station contact, the station contact is in contact with the pressure wheel, the pressure wheel is located on the rotary table, and the station contact makes the spring compressed by the pressure wheel Or loosen, control the gripper to tighten and loosen.

The visual detection device includes a side measurement mechanism and a blade surface measurement mechanism, wherein: a side camera, a side lens, a side coaxial light source, a side backlight, a blade surface camera, a blade surface detection lens assembly, a blade surface light source and two brackets , wherein: two brackets are respectively fixed on the opposite sides of the rotary table, the side camera, side lens and side coaxial light source are set on one bracket, the side backlight is set in front of the side lens, the edge camera, the edge light source and the blade surface detection lens assembly are arranged on another bracket of the rotary table.

The feeding mechanism included in the detection device of the present invention is specifically a feeding manipulator and a feeding tray part, the feeding tray part is responsible for feeding the feeding box along the V axis, and the feeding manipulator is responsible for grabbing the workpiece in the feeding box, and The shaft movement completes the loading work; the rotary table mechanism and the micro-drill rotation and height adjustment mechanism can adjust the position of the micro-drill and the precise adjustment of the circumferential and axial positions. position conversion; the visual detection device, specifically the micro-drill side measurement mechanism and the blade surface measurement mechanism, can respectively take pictures of the side and blade surface of the micro-drill, and send the image to the computer to judge whether the micro-drill is qualified; the blanking mechanism is specifically the collection The material manipulator, the good product receiving tray part and the defective product receiving tray part, the good product receiving tray part is responsible for feeding the good product receiving box along the U axis, and the defective product receiving tray part is responsible for feeding the defective product receiving box along the P axis, The receiving manipulator is responsible for grabbing the micro-drills on the unloading mechanism and placing them into the corresponding receiving boxes according to the test results - good product receiving boxes or defective product receiving boxes.

Compared with the prior art, the micro-drill quality detection device of the present invention adopts a rotating four-station layout, optimizes loading and unloading and measurement paths, and meets the requirements of detection accuracy and efficiency from the structure; the micro-drill rotation and height adjustment mechanism can make The micro-drill realizes the real-time precise adjustment of the circumferential rotation and the axial direction at the same time, which not only meets the detection requirements of the side parameters of the micro-drill, but also can fine-tune the axial positioning height of the micro-drill in real time, ensuring the imaging quality of the blade surface and the measurement accuracy of geometric parameters; Adopt precision servo drive and anti-seismic structure to ensure the stability and reliability of the detection device.

Description of drawings

Figure 1 is a schematic diagram of the layout of the micro-drill detection device.

Fig. 2 is a schematic diagram of the micro-drill rotation and height adjustment mechanism.

Fig. 3 is a schematic diagram of the micro-drill pneumatic clamping mechanism;

Among them: a is the main view, b is the top view.

Detailed ways

The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

As shown in Figure 1, the present embodiment includes: a feeding mechanism 1, a rotary table 2, a micro-drilling rotating mechanism 3, a height adjustment mechanism 4, a side measuring mechanism 5, a blade surface measuring mechanism 6 and a blanking mechanism 7, wherein: The rotary table 2 is set on the working platform, the feeding mechanism 1 and the unloading mechanism 6 are respectively arranged on the loading position and the unloading position of the working platform, and the micro-drilling rotating mechanism 3 and the height adjusting mechanism 4 are arranged sequentially from top to bottom At the side detection position of the rotary table 2, the visual detection device composed of the side measurement mechanism 5 and the blade surface measurement mechanism 6 is arranged at the corresponding visual detection position of the working platform.

The feeding mechanism 1 includes: a feeding manipulator 8, a feeding linear guide 9 and a feeding tray component 10, wherein: the feeding linear guide 9 is arranged in the X-axis direction of the working platform, and the feeding manipulator 8 is arranged on the feeding On the linear guide rail 9 , the feeding tray component 10 is arranged on the working platform, wherein the feeding linear guide rail 9 and the feeding tray component 10 are arranged orthogonally.

The unloading mechanism 7 includes: a receiving manipulator 11, a receiving linear guide rail 12, a good product receiving tray part 13 and a defective product receiving tray part 14, wherein: the receiving linear guide rail 12 is arranged in the y-axis direction of the working platform And perpendicular to the feeding linear guide rail 9, the material receiving manipulator 11 is arranged on the material receiving linear guide rail 12, the good product receiving tray part 13 and the defective product receiving tray part 14 are arranged on the working platform, the two are arranged in parallel at intervals, and respectively It is arranged orthogonally to the receiving linear guide rail 12.

The feeding manipulator 8 and the receiving manipulator 11 are three-degree-of-freedom pneumatic grippers, which can move back and forth along the motion axis in a straight line, and can move vertically. Catch and place the drill to realize the loading and unloading action.

Described micro-drilling rotating mechanism 3 comprises: motor 15, cylinder 16, synchronous pulley 17, friction wheel 18, wherein: the output shaft of motor 15 is coaxially connected with synchronous pulley 17, and synchronous pulley 17 meshes with friction wheel 18 , the cylinder 16 is arranged on the side frame and is connected with the slide table, and the cylinder 16 rod controls the friction wheel 18 to approach or stay away from the micro drill through the slide table.

The height adjustment mechanism 4 includes: a motor 19, a precision screw assembly 20 and a nut bracket 21, wherein: the output shaft of the motor 19 is coaxially connected with the precision ball screw assembly 20, and the nut bracket 21 is arranged on the screw nut and is connected to the screw nut. The micro-drilling rotating mechanism 3 is connected.

The rotary table 2 includes: a servo motor (not shown in the figure), a synchronous belt (not shown in the figure), a micro-drill pneumatic clamping mechanism 22 and an indexing rotary platform 23, wherein: the micro-drill is pneumatically clamped The mechanism 22 is arranged at the blanking position, the servo motor is arranged under the working platform, and the indexing and rotating platform 23 is arranged on the working platform, and the synchronous belt is respectively connected with the servo motor and the indexing and rotating platform 23 to realize station conversion.

Described micro-drill pneumatic clamping mechanism 22 comprises: clamping cylinder 24, guide rod 25, station contact 26, pressure roller 27, holder 28, stand (not shown in the figure), angle frame (figure Not shown in ) and spring 29, wherein: the clamping cylinder 24 is arranged on the angle frame connected with the stand, and the two ends of the guide rod 25 are respectively connected with the clamping cylinder 24 and the station contact 26, and the station contact 26 is in contact with the pinch wheel 27, and the pinch wheel 27 is located on the rotary table 2, and the station contact 26 makes the spring 29 compress or loosen by the pinch wheel 27, and controls the clamper 22 to clamp and loosen.

The visual detection device is composed of a side measuring mechanism 5 and a blade surface detection mechanism 6, and the visual monitoring device includes: a side camera, a side lens, a side coaxial light source, a side backlight, a blade surface camera, and a blade surface detection lens assembly , a blade surface light source and two brackets, wherein: the two brackets are respectively fixed on the opposite sides of the rotary table 2, the side camera, the side lens and the side coaxial light source are set on a bracket, and the side backlight is set on the side lens In the front, the blade surface camera, blade surface light source and blade surface detection lens assembly are arranged on another bracket.

The micro drill performs side parameter detection at the side measuring mechanism 5 . The micro-drill pneumatic clamping mechanism 22 controls the side measurement mechanism to release the micro-drill, the micro-drill rotation mechanism 3 controls the C-axis rotation to rotate the micro-drill, and at the same time, the host computer controls the side camera to collect images from the side of the micro-drill from multiple angles, and the image processing software calculates the micro-drill. Drill the geometric parameters of the side, and adjust the axial height of the micro-drill in real time. By controlling the height adjustment mechanism 4 of the micro-drill, adjust the micro-drill to a suitable height along the Z-axis, so that the image of the micro-drill blade surface on the blade surface measurement mechanism is clear. .

As shown in Figure 2, in the side detection process, the specific operation process of the micro-drilling rotating mechanism 3 and the height adjusting mechanism 4 is: the motor 18 drives the synchronous pulley 17 to rotate and drives the friction wheel 18 to rotate, the cylinder 16 rod of the cylinder 16 is retracted, and the friction wheel 18 compresses the micro-drill, and the rotation of the friction wheel 18 drives the micro-drill to rotate, and then realizes the rotation of the micro-drill. Motor 19 rotates and drives precision ball screw 20 to rotate, and lead screw nut moves linearly up and down, and lead screw nut and nut support 21 are fastened together, can drive micro-drill rotating mechanism 3 integral movements up and down, realizes micro-drill to move up and down.

After the side detection is completed, the cylinder 16 rod of the cylinder 16 stretches out, the friction wheel 18 is away from the micro-drill, the holder 28 clamps the micro-drill, and the indexing rotary platform 23 continues to rotate to send the micro-drill to the blade surface measuring mechanism 5, and the blade surface The camera collects the image of the blade surface, and the image processing software calculates the geometric parameters of the micro-drill blade surface.

As shown in Figure 3, the indexing rotary platform 23 continues to rotate and sends the micro-drill to the blanking mechanism 7, and the blanking mechanism 7 unclamps the micro-drill, and according to the detection results of the micro-drill at the side measuring mechanism 5 and the blade surface measuring mechanism 6, The upper computer automatically classifies the micro-drills and sends the classification results to the lower computer. The good product receiving tray part 13 and the defective product receiving box part 14 complete the good product receiving box and the defective product receiving box along the U axis and the P axis respectively. Here, the lower computer controls the receiving manipulator 11 to move along the Y-axis according to the classification results, and removes the micro-drill from the unloading mechanism 7 and places it in the corresponding material box—good product receiving box or defective product receiving box.

The work of the 4 stations is carried out at the same time, so that the reciprocating cycle realizes the purpose of fast-paced high-precision batch detection of micro-drills.

The working process of this embodiment is as follows: drive the feeding tray part to reach the feeding position, the feeding manipulator grabs the micro-drill in the feeding box, places it on the feeding position of the indexing rotary platform, and the rotation of the indexing rotary platform drives the micro-drill to Side measurement mechanism: the micro-drill performs side parameter detection on the side measurement mechanism, specifically: the micro-drill rotates for one revolution, and at the same time, the host computer performs multi-angle image acquisition on the side of the micro-drill, and the image processing software calculates the geometric parameters of the micro-drill side, and the micro-drill The axial height is compensated and adjusted in real time. Specifically, the micro-drill is adjusted to a suitable height by controlling the micro-drill height adjustment mechanism, so that the image of the micro-drill blade surface on the blade surface measurement mechanism is clear; the indexing rotary platform continues to rotate to send the micro-drill to Go to the blade surface measurement mechanism for image acquisition and detection of the blade surface; the indexing rotary platform continues to rotate to send the micro-drill to the blanking mechanism, and according to the detection results of the micro-drill on the side measurement mechanism and the blade surface measurement mechanism, the host computer automatically checks the micro-drill The drills are classified, and the classification results are sent to the lower computer. The lower computer controls the receiving manipulator according to the classification results, and removes the micro drills from the unloading mechanism and places them in the corresponding material box—good product box or defective product box.

Claims (8)

1. boring full-automatic quality detection device of micro drill point of pcb board, comprise: feed mechanism, rotary table, little brill rotating mechanism, height control mechanism, the side measuring mechanism, sword planar survey mechanism and cutting agency, it is characterized in that: rotary table is arranged on the workbench, corresponding respectively material loading position and the blanking position that is arranged at rotary table of feed mechanism and cutting agency, little brill rotating mechanism and height control mechanism from top to bottom are arranged at the side of rotary table successively, and side measuring mechanism and sword planar survey mechanism are arranged at the corresponding vision-based detection of workbench position respectively;

Described side measuring mechanism comprises: side camera, side camera lens, side coaxial light source and side backlight, described sword planar survey mechanism comprises: sword face camera, sword face detector lens assembly, sword area source and two supports, wherein: two supports are fixedly set in the relative both sides of rotary table respectively, side camera, side camera lens and side coaxial light source are arranged on the support, the side backlight is arranged at camera lens front, side, and sword face camera, sword area source and sword face detector lens assembly are arranged on another support of rotary table.

2. the boring full-automatic quality detection device of micro drill point of pcb board according to claim 1, it is characterized in that, described feed mechanism comprises: pan feeding mechanical arm, pan feeding line slideway and loading plate parts, wherein: the pan feeding line slideway is arranged on the workbench, the pan feeding mechanical arm is arranged on the pan feeding line slideway, the loading plate parts are arranged on the workbench, wherein pan feeding line slideway and the orthogonal thereto layout of loading plate parts.

3. the boring full-automatic quality detection device of micro drill point of pcb board according to claim 2, it is characterized in that, described cutting agency comprises: rewinding mechanical arm, rewinding line slideway, non-defective unit rewinding disk component and substandard products rewinding disk component, wherein: the rewinding line slideway is arranged on the workbench and is perpendicular with feed mechanism, the rewinding mechanical arm is arranged on the rewinding line slideway, non-defective unit rewinding disk component and substandard products rewinding disk component are arranged at workbench, the two spaced and parallel arranges, and respectively with the orthogonal thereto layout of rewinding line slideway.

4. the boring full-automatic quality detection device of micro drill point of pcb board according to claim 3, it is characterized in that, described pan feeding mechanical arm and rewinding mechanical arm are the Three Degree Of Freedom Pneumatic paw, can be along kinematic axis straight line back and forth movement, but and vertical movement axle motion, finger can be realized clamping and loosening up simultaneously, thereby finishes extracting and placement to little brill, realizes upper and lower material action.

5. the boring full-automatic quality detection device of micro drill point of pcb board according to claim 1, it is characterized in that, described little brill rotating mechanism comprises: motor, cylinder, synchronous pulley and friction pulley, wherein: the output shaft of motor is connected with synchronous pulley is coaxial, with shaft pulley and friction pulley engagement, cylinder is arranged at bogie side frame and is connected with slide unit, cylinder rod by slide unit control friction pulley near or away from little brill.

6. the boring full-automatic quality detection device of micro drill point of pcb board according to claim 1, it is characterized in that, described height control mechanism comprises: motor, precision lead screw assembly and nut support, wherein: the output shaft of motor is connected with the precision ball screw assembly is coaxial, and the nut support is arranged at feed screw nut and is connected with little brill rotating mechanism.

7. the boring full-automatic quality detection device of micro drill point of pcb board according to claim 1, it is characterized in that, described rotary table comprises: servomotor, synchronous band, the pneumatic clamping device of little brill and calibration rotation platform, wherein: the pneumatic clamping device of little brill is arranged at the blanking position of rotary table, servomotor is arranged at the workbench below, the calibration rotation platform is arranged on the workbench, and band connects servomotor and calibration rotation platform respectively synchronously, realizes the station conversion.

8. the boring full-automatic quality detection device of micro drill point of pcb board according to claim 7, it is characterized in that, the pneumatic clamping device of described little brill comprises: gripper cylinder, guide pole, station contact, pinch roller, clamper, stand, corner bracket and spring, wherein: gripper cylinder is arranged at the corner bracket that is connected with stand, the two ends of guide pole are connected with the station contact with gripper cylinder respectively, the station contact contacts with pinch roller, pinch roller is positioned on the rotary table, the station contact makes spring compression or loosen by pinch roller, and the control clamp holder clamping is loosened.