A precise dispensing device integrating online detection and automatic centering and a dispensing process thereof

Abstract

The application discloses a precise point glue equipment integrated with online detection and automatic centering and a point glue process thereof. The precise point glue equipment comprises a rack, a point glue assembly, an automatic centering assembly, a radial run-out detection assembly and an end face flatness detection assembly. The automatic centering assembly comprises a rotary workbench, a jig centering adjusting mechanism and a workpiece positioning adjusting mechanism. The rotary workbench comprises a movable turntable, a driving rotating shaft, a servo driving motor and a rotary joint. Vacuum adsorption grooves are formed in the upper surface of the movable turntable. The radial run-out detection assembly comprises a table frame and a millionth table. The end face flatness detection assembly comprises a height gauge support and a height gauge. The precise point glue equipment can effectively guarantee the centering precision between a rotary workpiece and a glue jig, and can realize end face flatness detection of the rotary workpiece through an online detection mode, so that the end face defects of the rotary workpiece can be found in time through preventive detection before point glue, and the subsequent processing risk is reduced. The point glue process of the application is based on the above-mentioned precise point glue equipment.

Description

Technical Field

[0001] This invention relates to the field of dispensing equipment technology, and in particular to a precision dispensing equipment and dispensing process that integrates online detection and automatic centering. Background Technology

[0002] Dispensing is a key process in fields such as electronics manufacturing and precision machining. In the process of precision mold manufacturing, rotating workpieces such as tungsten carbide mold cores and sleeves are usually temporarily fixed to adhesive fixtures by dispensing before the outer diameter and aspherical surfaces are machined.

[0003] It should be noted that the existing dispensing process for rotating workpieces has the following technical problems, specifically: 1. Centering accuracy is difficult to guarantee and online calibration methods are lacking: Existing equipment mostly uses manual visual inspection or simple mechanical positioning. The coaxiality between the rotating workpiece and the adhesive fixture depends on operating experience, resulting in large and irregular deviations. When the component (the rotating workpiece is glued and fixed to the adhesive fixture) is installed on the machine tool (such as a lathe or grinding machine) after the adhesive has cured, a lot of time is required for "dimension calibration" to correct the eccentricity error. More seriously, if there is eccentricity between the rotating workpiece and the adhesive fixture, even if the machine tool spindle is calibrated to be concentric, the adhesive fixture itself will rotate eccentrically. During high-speed machining, this will cause centrifugal force, resulting in machine tool vibration, which seriously affects the dimensional accuracy and surface quality of the rotating workpiece. 2. Lack of online inspection for the flatness of the end face of rotating workpieces: The flatness of the end face of rotating workpieces directly affects the bonding strength and processing stability. If there are defects such as burrs or dents on the end face, uneven adhesive layer or local delamination is likely to occur after the adhesive has cured, causing the rotating workpiece to loosen and fall off during processing. The traditional manual dispensing process involves manually dispensing the adhesive and then moving the component to a height gauge for offline flatness measurement after the adhesive has cured. If the flatness exceeds the tolerance, it needs to be re-glued. This process is cumbersome, inefficient, and cannot achieve preventive inspection before dispensing.

[0004] To address the shortcomings of existing dispensing processes for rotating workpieces and adhesive fixtures, it is necessary to design and develop a precision dispensing device that integrates online detection and automatic centering. Summary of the Invention

[0005] The purpose of this invention is to provide a precision dispensing device that integrates online detection and automatic centering to address the shortcomings of existing technologies. This precision dispensing device with integrated online detection and automatic centering has a novel structural design. On the one hand, it can effectively ensure the centering accuracy between the rotating workpiece and the adhesive fixture. On the other hand, it can realize the flatness detection of the end face of the rotating workpiece through online detection, so as to detect defects on the end face of the rotating workpiece in time through preventive detection before dispensing and reduce the risk of subsequent processing.

[0006] Another objective of this invention is to provide a dispensing process that addresses the shortcomings of existing technologies. This dispensing process can effectively ensure the centering accuracy between the rotating workpiece and the adhesive fixture, and can also detect the flatness of the rotating workpiece end face through online detection. This preventive inspection before dispensing can promptly identify defects on the end face of the rotating workpiece and reduce the risk of subsequent processing.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions.

[0008] A precision dispensing device integrating online detection and automatic centering includes a frame, a dispensing assembly mounted on the frame, and the frame is also equipped with an automatic centering assembly, a radial runout detection assembly, and an end face flatness detection assembly. The automatic centering assembly includes a rotary table, which includes a movable turntable rotatably mounted on the upper side of the frame and arranged horizontally. The upper surface of the movable turntable is a fixture placement surface, and a vacuum adsorption groove is formed in the middle area of ​​the fixture placement surface of the movable turntable. The core of the movable turntable has a vertically penetrating turntable adsorption hole that connects to the vacuum adsorption groove. A drive shaft, arranged vertically and coaxial with the movable turntable, is rotatably mounted on the frame via a bearing seat. The upper end of the drive shaft extends to the upper side of the frame and is connected to the movable turntable. The core of the drive shaft has a vertically penetrating shaft adsorption hole that aligns with and communicates with the turntable adsorption hole of the movable turntable. A rotary joint connected to a vacuum generator via a pipe is installed at the lower opening of the shaft adsorption hole at the lower end of the drive shaft. A servo drive motor is installed on the frame corresponding to the drive shaft, and the servo drive motor is driven by the drive shaft. The automatic centering assembly also includes a fixture centering adjustment mechanism for causing the adhesive fixture to move horizontally, and a workpiece positioning adjustment mechanism for causing the rotating workpiece to move horizontally. The radial runout detection assembly includes a dial indicator frame mounted on the frame and a dial indicator mounted on the upper end of the dial indicator frame. The dial indicator frame is an adjustable support. The end face flatness detection component includes a height gauge bracket mounted on the frame, a height gauge mounted on the upper end of the height gauge bracket and located on the upper side of the movable turntable, and the height gauge bracket is an adjustable bracket.

[0009] The automatic centering component further includes a left support located at the left end of the rotation center of the movable turntable and a right support located at the right end of the rotation center of the movable turntable, with the left support and the right support respectively screwed onto the frame. The fixture centering adjustment mechanism includes a lower transmission link and a lower thrust wrench arranged horizontally, and the workpiece centering adjustment mechanism includes an upper transmission link and an upper thrust wrench arranged horizontally. The upper transmission link is located on the upper end side of the lower transmission link, and the upper thrust wrench is located on the upper end side of the lower thrust wrench. The right ends of the upper and lower transmission links are hinged to the right support via a vertically arranged right pivot. The right ends of the upper and lower thrust wrenches are hinged to the left support via a vertically arranged left pivot. The right end of the upper thrust wrench is provided with an upper arc-shaped cam surface, and the right end of the lower thrust wrench is provided with a lower arc-shaped cam surface. The left end of the upper transmission link extends to the rear end of the upper thrust wrench, and the upper arc-shaped cam surface is in line contact with the left end of the upper transmission link. The left end of the lower transmission link extends to the rear end of the lower thrust wrench, and the lower arc-shaped cam surface is in line contact with the left end of the lower transmission link. The upper end of the left support is equipped with an upper compression spring that elastically abuts against the left end of the upper transmission link and a lower compression spring that elastically abuts against the left end of the lower transmission link. The upper transmission link is equipped with an upper parallel push block and an upper limit stop block located on the left side of the upper parallel push block. The center of the upper parallel push block is aligned with the rotation center of the movable turntable. The lower transmission link is equipped with a lower parallel push block and a lower limit stop block located on the left side of the lower parallel push block. The center of the lower parallel push block is aligned with the rotation center of the movable turntable.

[0010] The upper parallel push block has a first screw mounting hole that extends vertically through the rear end and extends along the front-rear direction. A first locking screw is installed in the first bolt mounting hole. The first locking screw is screwed to the upper transmission link, and the upper parallel push block is locked and fixed to the upper transmission link by the first locking screw. The upper limit stop block has a second screw mounting hole that extends vertically through and along the left and right direction. A second locking screw is installed in the second screw mounting hole, and the upper limit stop block is locked and fixed to the upper transmission link by the second locking screw.

[0011] The lower parallel push block and the lower transmission link are an integral structure, and the lower limit stop is screwed onto the lower transmission link.

[0012] The right pivot is fastened to the right support, and the right end of the upper transmission link and the right end of the lower transmission link are pivotally connected to the right pivot through bearings. The left pivot is fastened to the left support, and the right end of the upper thrust wrench and the right end of the lower thrust wrench are pivotally connected to the left pivot via bearings.

[0013] The left support has spring positioning holes corresponding to the upper compression spring and the lower compression spring, and the upper compression spring and the lower compression spring are respectively installed in the corresponding spring positioning holes.

[0014] The upper surface of the movable turntable is coated with a diamond-like carbon (DLC) coating.

[0015] The frame is screwed with a motor mounting base corresponding to the servo drive motor, and the servo drive motor is screwed into the motor mounting base. The power output shaft of the servo drive motor is equipped with an active synchronous pulley, and the lower end of the drive shaft is equipped with a driven synchronous pulley. A transmission synchronous belt is wound between the active synchronous pulley and the driven synchronous pulley.

[0016] A dispensing process based on the aforementioned precision dispensing equipment integrating online detection and automatic centering; The dispensing process includes the following steps, specifically: Step S1: Adjust the position of the upper limit stop: Adjust the left and right positions of the upper limit stop according to the diameter of the rotating workpiece so that the distance between the workpiece contact position of the upper limit stop and the center plane of the upper parallel push block is adapted to the radius of the rotating workpiece. Step S2: Place the adhesive fixture: Place the adhesive fixture on the fixture placement surface of the movable turntable, and make the lower surface of the adhesive fixture cover the vacuum adsorption groove on the upper surface of the movable turntable. Step S3, Concentricity calibration of adhesive fixture: Start the servo drive motor and make the drive shaft drive the movable turntable to rotate slowly. Adjust the dial indicator frame and make the probe of the dial indicator contact the outer circumferential surface of the adhesive fixture. The dial indicator monitors the radial runout of the adhesive fixture in real time. The operator slowly pulls the lower push wrench, and the lower arc-shaped cam surface of the lower push wrench deflects. Under the restoring force of the lower compression spring, the left end of the lower transmission link slowly deflects forward. Under the action of the lower parallel push block and the lower limit block, the adhesive fixture gradually moves towards the rotation center of the movable turntable until the radial runout value of the adhesive fixture is less than or equal to the set value. Step S4, Vacuum Adsorption Adhesive Fixture: When the radial runout value of the adhesive fixture is less than or equal to the set value, it indicates that the concentricity of the adhesive fixture is qualified. Start the vacuum generator and make the vacuum adsorption tank of the movable turntable adsorb and fix the adhesive fixture under negative pressure, so as to firmly adsorb the adhesive fixture onto the upper surface of the movable turntable. Step S5: Place the rotating workpiece: After the adhesive jig is firmly attached to the upper surface of the movable turntable, pause the servo drive motor, and then place the rotating workpiece on the upper surface of the adhesive jig that has been fixed by negative pressure. Step S6, Concentricity calibration of rotating workpiece: Restart the servo drive motor and make the drive shaft drive the movable turntable to rotate slowly. Adjust the dial indicator frame and make the probe of the dial indicator contact the outer circumferential surface of the rotating workpiece. The dial indicator monitors the radial runout of the rotating workpiece in real time. The operator slowly pulls the upper thrust wrench, and the upper arc-shaped cam surface of the upper thrust wrench deflects. Under the restoring force of the upper compression spring, the left end of the upper transmission linkage slowly deflects forward. Under the action of the upper parallel push block and the upper limit stop block, the rotating workpiece gradually moves towards the rotation center position of the movable turntable until the radial runout value of the rotating workpiece is less than or equal to the set value. Step S7, Flatness Inspection: After the concentricity of the rotating workpiece is adjusted, turn off the servo drive motor and stop the rotating turntable. Then, use a height gauge to measure the flatness of the upper surface of the rotating workpiece at multiple points to obtain the flatness of the upper surface of the rotating workpiece. If the flatness value of the upper surface of the rotating workpiece is greater than the set value, readjust or replace the adhesive fixture. Step S8, dispensing operation: After confirming that the flatness value of the upper end face of the rotating workpiece is less than or equal to the set value, it means that the flatness of the upper end face of the rotating workpiece is qualified. Start the dispensing component and dispense glue to the joint between the rotating workpiece and the adhesive fixture. During this process, the servo drive motor starts and the movable turntable drives the adhesive fixture and the rotating workpiece to rotate, so that the joint between the rotating workpiece and the adhesive fixture is automatically dispensed one full circle. Step S9, Unloading: After the dispensing assembly completes the dispensing operation, turn off the vacuum generator and wait for the adhesive to solidify. Then remove the bonded rotating workpiece and the adhesive fixture, and then proceed to the next cycle.

[0017] Compared with the prior art, the present invention has the following beneficial effects, specifically: 1. In the process of centering the adhesive fixture and rotating workpiece in the precision dispensing equipment integrating online detection and automatic centering of the present invention, the present invention realizes online centering detection through a radial runout detection component; before the dispensing component performs the dispensing operation, the present invention performs flatness detection on the upper end face of the centered rotating workpiece through end face flatness detection, so that defects on the end face of the rotating workpiece can be detected before dispensing, avoiding subsequent processing risks; 2. When the precision dispensing equipment integrating online detection and automatic centering of the present invention is in operation, the present invention achieves accurate centering of the adhesive fixture and the movable turntable through the cooperation of the rotating worktable, the fixture centering adjustment mechanism, and the radial runout detection component, and achieves accurate centering of the rotating workpiece and the adhesive fixture through the cooperation of the rotating worktable, the workpiece centering adjustment mechanism, and the radial runout detection component; compared with the prior art, the precision dispensing equipment integrating online detection and automatic centering of the present invention can effectively ensure the centering accuracy between the rotating workpiece and the adhesive fixture; 3. Therefore, the precision dispensing equipment integrating online detection and automatic centering of the present invention has the advantages of novel structural design. On the one hand, it can effectively ensure the centering accuracy between the rotating workpiece and the adhesive fixture. On the other hand, it can realize the flatness detection of the end face of the rotating workpiece through online detection, so as to detect defects on the end face of the rotating workpiece in time through preventive detection before dispensing and reduce the risk of subsequent processing.

[0018] 4. The dispensing process of the present invention is based on the above-mentioned precision dispensing equipment that integrates online detection and automatic centering. Accordingly, the dispensing process of the present invention can effectively ensure the centering accuracy between the rotating workpiece and the adhesive fixture, and can also realize the flatness detection of the end face of the rotating workpiece through online detection, so as to detect defects on the end face of the rotating workpiece in time through preventive detection before dispensing and reduce the risk of subsequent processing. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0022] Figure 3 This is a structural schematic diagram from another perspective of the present invention.

[0023] Figure 4 This is a schematic diagram of the automatic centering component of the present invention.

[0024] Figure 5 This is a structural schematic diagram of the automatic centering component of the present invention from another perspective.

[0025] Figure 6 This is a cross-sectional schematic diagram of the automatic centering component of the present invention.

[0026] Figure 7 This is a structural schematic diagram of another location of the automatic centering component of the present invention.

[0027] Figure 8 This is a schematic diagram of the structure of the movable turntable of the present invention.

[0028] exist Figures 1 to 8 This includes: 1-Frame; 2-Dispensing assembly; 3-Automatic centering assembly; 31-Rotary worktable; 311-Modible turntable; 3111-Jig placement surface; 3112-Vacuum adsorption tank; 3113-Turntable adsorption hole; 312-Bearing seat; 313-Drive shaft; 3131-Shaft adsorption hole; 314-Rotary joint; 315-Servo drive motor; 316-Motor mounting base; 317-Active synchronous pulley; 318-Driven synchronous pulley; 319-Transmission synchronous belt; 32-Jig centering adjustment mechanism; 321-Lower transmission link; 322-Lower thrust wrench; 3221-Lower arc-shaped cam surface; 323-Lower compression spring; 324-Lower parallel push block; 325-Lower limit stop; 33-Workpiece centering adjustment mechanism; 331-Upper transmission link; 332-Upper push wrench; 3321-Upper arc-shaped cam surface; 333-Upper compression spring; 334-Upper parallel push block; 3341-First screw mounting hole; 335-Upper limit stop; 3351-Second screw mounting hole; 34-Left side support; 341-Spring positioning hole; 35-Right side support; 36-Left side pivot; 37-Right side pivot; 38-Bearing; 4-Radial runout detection assembly; 41-Indicator holder; 42-Dial indicator; 5-End face flatness detection assembly; 51-Altitude gauge bracket; 52-Altitude gauge; 6-Adhesive jig; 7-Rotating workpiece. Detailed Implementation

[0029] The present invention will now be described in conjunction with specific embodiments.

[0030] Example 1, as Figures 1 to 3 As shown, a precision dispensing device integrating online detection and automatic centering includes a frame 1 and a dispensing assembly 2 mounted on the frame 1. The frame 1 is characterized by further being equipped with an automatic centering assembly 3, a radial runout detection assembly 4, and an end face flatness detection assembly 5. It should be noted that the dispensing assembly 2 in this embodiment includes a dispensing head bracket mounted on the frame 1, with an automatic dispensing head mounted at the upper end of the bracket. The dispensing head bracket is an adjustable bracket. It should be pointed out that the dispensing assembly 2 in this embodiment is already prior art and will not be described in detail here.

[0031] Furthermore, such as Figures 1 to 7As shown, the automatic centering assembly 3 includes a rotary table 31, which includes a movable turntable 311 rotatably mounted on the upper side of the frame 1 and arranged horizontally. The upper surface of the movable turntable 311 is a fixture placement surface 3111, and a vacuum adsorption groove 3112 is provided in the middle area of ​​the fixture placement surface 3111 of the movable turntable 311. The core of the movable turntable 311 has a vertically penetrating turntable adsorption hole 3113 that is connected to the vacuum adsorption groove 3112. The frame 1 is rotatably mounted with a vertically arranged drive shaft 311, which is coaxial with the movable turntable 311, via a bearing seat 312. 13. The upper end of the drive shaft 313 extends to the upper side of the frame 1 and is connected to the movable turntable 311. The core of the drive shaft 313 has a vertically penetrating shaft adsorption hole 3131 that is aligned and communicates with the turntable adsorption hole 3113 of the movable turntable 311. The lower end of the drive shaft 313 is equipped with a rotary joint 314 connected to a vacuum generator via a pipe at the lower opening of the shaft adsorption hole 3131. The frame 1 is equipped with a servo drive motor 315 corresponding to the drive shaft 313, and the servo drive motor 315 is driven by the drive shaft 313. It should be explained that in this embodiment, the rotary joint 314 rotates relative to the drive shaft 313, and the rotary joint 314 remains stationary during the rotation of the drive shaft 313. The rotary joint 314 in this embodiment is already prior art and will not be described in detail here.

[0032] Furthermore, such as Figures 1 to 7 As shown, the automatic centering assembly 3 also includes a fixture centering adjustment mechanism 32 for causing the adhesive fixture 6 to move horizontally, and a workpiece positioning adjustment mechanism for causing the rotating workpiece 7 to move horizontally.

[0033] In addition, such as Figures 1 to 3 As shown, the radial runout detection assembly 4 includes a dial indicator 41 mounted on the frame 1 and a dial indicator 42 mounted on the upper end of the dial indicator 41. The dial indicator 41 is an adjustable support.

[0034] And also, such as Figures 1 to 3 As shown, the end face flatness detection component 5 includes an altimeter bracket 51 mounted on the frame 1 and an altimeter 52 mounted on the upper end of the altimeter bracket 51 and located on the upper side of the movable turntable 311. The altimeter bracket 51 is an adjustable bracket. It should be noted that the altimeter 52 in this embodiment can be a Nikon contact digital altimeter with a measurement accuracy of ±0.5μm and a measurement range of 0-10mm.

[0035] It should be noted that the precision dispensing equipment integrating online detection and automatic centering in this embodiment is equipped with a controller. The dispensing component 2, servo drive motor 315, vacuum generator, dial indicator 42 and height gauge 52 in this embodiment can be electrically connected to the controller. When the precision dispensing equipment integrating online detection and automatic centering in this embodiment is working, the controller controls the dispensing component 2, servo drive motor 315 and vacuum generator to operate.

[0036] In the process of applying adhesive to the rotating workpiece 7 and the adhesive fixture 6 using the precision dispensing equipment with integrated online detection and automatic centering as described in Embodiment 1, the following steps are included: Step a: Place the adhesive jig 6 on the jig placement surface 3111 of the movable turntable 311, and make the lower surface of the adhesive jig 6 cover the vacuum adsorption groove 3112 on the upper surface of the movable turntable 311. Step b: Start the servo drive motor 315 and make the drive shaft 313 drive the movable turntable 311 to rotate slowly. Adjust the dial indicator frame 41 and make the probe of the dial indicator 42 contact the outer circumferential surface of the adhesive fixture 6. The dial indicator 42 monitors the radial runout of the adhesive fixture 6 in real time. During this process, the dial indicator 42 feeds back the collected data to the controller. The controller analyzes and calculates the radial runout of the outer circumferential surface of the adhesive fixture 6. Step c: Adjust the position of the adhesive jig 6 by means of the jig centering adjustment mechanism 32 so that the adhesive jig 6 is centered with the movable turntable 311 until the radial runout value of the adhesive jig 6 is less than or equal to the set value, for example, 0.005mm. Step d: After the radial runout value of the adhesive jig 6 is less than or equal to the set value, start the vacuum generator and make the vacuum adsorption groove 3112 of the movable turntable 311 adsorb and fix the adhesive jig 6 under negative pressure, so as to firmly adsorb the adhesive jig 6 onto the jig placement surface 3111 of the movable turntable 311. Step e: After the adhesive jig 6 is firmly attached to the jig placement surface 3111 of the movable turntable 311, pause the servo drive motor 315, and then place the rotating workpiece 7 on the upper surface of the adhesive jig 6 that has been fixed by negative pressure. Adjust the dial indicator frame 41 so that the probe of the dial indicator 42 contacts the outer circumferential surface of the rotating workpiece 7. The dial indicator 42 monitors the radial runout of the rotating workpiece 7 in real time. During this process, the dial indicator 42 feeds back the collected data to the controller, and the controller analyzes and calculates the radial runout of the outer circumferential surface of the rotating workpiece 7. Step f: Adjust the position of the rotating workpiece 7 by adjusting the workpiece centering mechanism so that the rotating workpiece 7 is centered with the adhesive fixture 6 until the radial runout of the rotating workpiece 7 is less than or equal to the set value, for example, 0.005mm. After step g, the concentricity of the rotating workpiece is adjusted, the servo drive motor 315 is turned off and the movable turntable 311 stops rotating. Then, the upper end face of the rotating workpiece 7 is measured at multiple points by the height gauge 52 to obtain the flatness of the upper end face of the rotating workpiece 7. The height gauge 52 uses the height of multiple positions on the upper end face of the rotating workpiece 7 and feeds the collected height value information back to the controller. The controller analyzes and calculates to obtain the flatness of the upper end face of the rotating workpiece 7. Step h: Apply glue to the joint between the rotating workpiece 7 and the adhesive fixture 6 through the glue dispensing assembly 2. During this process, the servo drive motor 315 is started and the movable turntable 311 drives the adhesive fixture 6 and the rotating workpiece 7 to rotate, so that the glue is automatically dispensed around the joint between the rotating workpiece 7 and the adhesive fixture 6. Step i: After the dispensing assembly 2 completes the dispensing operation, turn off the vacuum generator and wait for the adhesive to solidify. Then remove the bonded rotating workpiece 7 and the adhesive fixture 6, and then proceed to the next cycle.

[0037] It should be emphasized that, for the precision dispensing equipment integrating online detection and automatic centering in this embodiment, during the centering operation of the adhesive fixture 6 and the rotating workpiece 7, this embodiment uses the radial runout detection component 4 to achieve online centering detection; before the dispensing component 2 performs the dispensing operation, this embodiment uses end face flatness detection to perform flatness detection on the upper end face of the centered rotating workpiece 7, so that defects on the end face of the rotating workpiece 7 can be detected before dispensing, avoiding risks in subsequent processing.

[0038] It should be further emphasized that, in the operation of the precision dispensing equipment integrating online detection and automatic centering in this embodiment, this embodiment achieves accurate centering of the adhesive jig 6 and the movable turntable 311 through the cooperation of the rotating worktable 31, the jig centering adjustment mechanism 32, and the radial runout detection component 4, and achieves accurate centering of the rotating workpiece 7 and the adhesive jig 6 through the cooperation of the rotating worktable 31, the workpiece centering adjustment mechanism 33, and the radial runout detection component 4. Compared with the prior art, the precision dispensing equipment integrating online detection and automatic centering in this embodiment can effectively ensure the centering accuracy between the rotating workpiece 7 and the adhesive jig 6.

[0039] In summary, the precision dispensing equipment integrating online detection and automatic centering in this embodiment has the advantage of novel structural design through the above structural design. On the one hand, it can effectively ensure the centering accuracy between the rotating workpiece 7 and the adhesive fixture 6. On the other hand, it can realize the flatness detection of the end face of the rotating workpiece 7 through online detection, so as to detect defects on the end face of the rotating workpiece 7 in time through preventive detection before dispensing and reduce the risk of subsequent processing. Example 2, as Figures 1 to 7As shown, the difference between this embodiment 2 and embodiment 1 is that the automatic centering component 3 further includes a left support 34 located on the left end of the rotation center of the movable turntable 311 and a right support 35 located on the right end of the rotation center of the movable turntable 311. The left support 34 and the right support 35 are respectively screwed onto the frame 1.

[0040] The fixture centering adjustment mechanism 32 includes a lower transmission link 321 and a lower thrust wrench 322, which are arranged horizontally. The workpiece centering adjustment mechanism 33 includes an upper transmission link 331 and an upper thrust wrench 332, which are arranged horizontally. The upper transmission link 331 is located on the upper end side of the lower transmission link 321, and the upper thrust wrench 332 is located on the upper end side of the lower thrust wrench 322.

[0041] In addition, the right ends of the upper transmission link 331 and the lower transmission link 321 are hinged to the right support 35 via a vertically arranged right pivot 37, and the right ends of the upper thrust wrench 332 and the lower thrust wrench 322 are hinged to the left support 34 via a vertically arranged left pivot 36; the right end of the upper thrust wrench 332 is provided with an upper arc-shaped cam surface 3321, and the right end of the lower thrust wrench 322 is provided with a lower arc-shaped cam surface 3221; the left end of the upper transmission link 331... The upper part extends to the rear end of the upper thrust wrench 332 and the upper arc-shaped cam surface 3321 is in line contact with the left end of the upper transmission link 331. The left end of the lower transmission link 321 extends to the rear end of the lower thrust wrench 322 and the lower arc-shaped cam surface 3221 is in line contact with the left end of the lower transmission link 321. The upper end of the left side support 34 is equipped with an upper compression spring 333 that elastically abuts against the left end of the upper transmission link 331 and a lower compression spring 323 that elastically abuts against the left end of the lower transmission link 321.

[0042] Furthermore, the upper transmission link 331 is equipped with an upper parallel push block 334 and an upper limit stop block 335 located on the left side of the upper parallel push block 334, with the center of the upper parallel push block 334 aligned with the rotation center of the movable turntable 311; the lower transmission link 321 is equipped with a lower parallel push block 324 and a lower limit stop block 325 located on the left side of the lower parallel push block 324, with the center of the lower parallel push block 324 aligned with the rotation center of the movable turntable 311.

[0043] During the centering process of the adhesive jig 6 and the movable turntable 311 by the cooperation of the rotary worktable 31, the jig centering adjustment mechanism 32 and the radial runout detection component 4, when the operator pulls the lower push wrench 322, the lower arc-shaped cam surface 3221 of the lower push wrench 322 retracts. Under the action of the return spring force of the lower compression spring 323, the left end of the lower transmission link 321 deflects forward. The deflecting action of the lower transmission link 321 drives the lower parallel push block 324 and the lower limit stop block 325 to move synchronously. Under the cooperation of the lower parallel push block 324 and the lower limit stop block 325, the adhesive jig 6 slowly moves towards the center position of the movable turntable 311, thereby achieving the centering of the adhesive jig 6 and the movable turntable 311.

[0044] During the centering process of the adhesive jig 6 and the movable turntable 311 by the cooperation of the rotary worktable 31, the workpiece centering adjustment mechanism 33 and the radial runout detection component 4, when the operator pulls the upper push wrench 332, the upper arc-shaped cam surface 3321 of the upper push wrench 332 retracts. Under the action of the reset elastic force of the upper compression spring 333, the left end of the upper transmission link 331 deflects forward. The deflecting action of the upper transmission link 331 drives the upper parallel push block 334 and the upper limit stop block 335 to move synchronously. Under the cooperation of the upper parallel push block 334 and the upper limit stop block 335, the rotating workpiece 7 slowly moves towards the center position of the adhesive jig 6, thereby achieving the centering of the rotating workpiece 7 and the adhesive jig 6.

[0045] It should be noted that the function of the lower limit block 325 and the upper limit block 335 in this embodiment is as follows: when the adhesive jig 6 or the rotating workpiece 7 moves automatically towards the center during rotation, the limit block can provide lateral limit to prevent the adhesive jig 6 or the rotating workpiece 7 from deviating after centering due to uneven friction. Example 3, as Figure 4 As shown, the difference between this embodiment 3 and embodiment 2 is that: the rear end of the upper parallel push block 334 is provided with a first screw mounting hole 3341 that extends vertically through and along the front-back direction, a first locking screw (not shown in the figure) is installed in the first bolt mounting hole, the first locking screw is screwed to the upper transmission link 331, and the upper parallel push block 334 is locked and fixed to the upper transmission link 331 by the first locking screw.

[0046] The upper limit stop 335 has a second screw mounting hole 3351 that extends vertically through and along the left and right directions. A second locking screw (not shown in the figure) is installed in the second screw mounting hole 3351. The upper limit stop 335 is locked and fixed to the upper transmission link 331 by the second locking screw.

[0047] In this embodiment three, the upper parallel push block 334 can be adaptively adjusted to move forward and backward according to the outer diameter of the rotating workpiece 7, and the upper limit stop block 335 can be adaptively adjusted to move left and right according to the outer diameter of the rotating workpiece 7. Example 4, as Figure 4 and Figure 6 As shown, the difference between this embodiment four and embodiment two is that the lower parallel push block 324 and the lower transmission link 321 are an integral structure, and the lower limit stop block 325 is screwed onto the lower transmission link 321. Example 5, as Figure 5 and Figure 7 As shown, the difference between this fifth embodiment and the first embodiment is that the right pivot 37 is fastened to the right support 35, and the right end of the upper transmission link 331 and the right end of the lower transmission link 321 are pivotally connected to the right pivot 37 through the bearing 38 respectively.

[0048] In addition, the left pivot 36 is fastened to the left support 34, and the right end of the upper thrust wrench 332 and the right end of the lower thrust wrench 322 are pivotally connected to the left pivot 36 via bearings 38. Example 6, as Figure 7 As shown, the difference between this embodiment six and embodiment two is that: the left support 34 has spring positioning holes 341 respectively for the upper compression spring 333 and the lower compression spring 323, and the upper compression spring 333 and the lower compression spring 323 are respectively embedded in the corresponding spring positioning holes 341. Example 7 differs from Example 1 in that the upper surface of the movable turntable 311 is provided with a diamond-like carbon (DLC) coating.

[0049] The fixture placement surface 3111 of the movable turntable 311 is in direct contact with the adhesive fixture 6. By applying a diamond-like carbon (DLC) coating to the fixture placement surface 3111 of the movable turntable 311, the coating thickness can be 0.02-0.05mm and the hardness can reach HV3000 or higher. This can significantly improve the wear resistance and service life of the fixture placement surface 3111 of the movable turntable 311. Example 8, as Figures 2 to 7 As shown, the difference between this embodiment eight and embodiment one is that: the frame 1 is screwed with a motor mounting base 316 corresponding to the servo drive motor 315, and the servo drive motor 315 is screwed into the motor mounting base 316.

[0050] The servo drive motor 315 has a power output shaft equipped with an active synchronous pulley 317, and the lower end of the drive shaft 313 is equipped with a driven synchronous pulley 318. A transmission synchronous belt 319 is wound between the active synchronous pulley 317 and the driven synchronous pulley 318. Example 9: A dispensing process based on the aforementioned precision dispensing equipment integrating online detection and automatic centering; The dispensing process includes the following steps, specifically: Step S1: Adjust the position of the upper limit stop 335: Adjust the left and right positions of the upper limit stop 335 according to the diameter of the rotating workpiece 7 so that the distance between the workpiece contact position of the upper limit stop 335 and the center plane of the upper parallel push block 334 is adapted to the radius value of the rotating workpiece 7. Step S2, Place the adhesive fixture 6: Place the adhesive fixture 6 on the fixture placement surface 3111 of the movable turntable 311, and make the lower surface of the adhesive fixture 6 cover the vacuum adsorption groove 3112 on the upper surface of the movable turntable 311. Step S3, Concentricity calibration of adhesive fixture 6: Start the servo drive motor 315 and make the drive shaft 313 drive the movable turntable 311 to rotate slowly. Adjust the dial indicator frame 41 and make the probe of the dial indicator 42 contact the outer circumferential surface of the adhesive fixture 6. The dial indicator 42 monitors the radial runout of the adhesive fixture 6 in real time. The operator slowly pulls the lower push wrench 322, and the lower arc-shaped cam surface 3221 of the lower push wrench 322 deflects. Under the action of the return spring force of the lower compression spring 323, the left end of the lower transmission link 321 slowly deflects forward. Under the action of the lower parallel push block 324 and the lower limit stop block 325, the adhesive jig 6 gradually moves towards the rotation center position of the movable turntable 311 until the radial runout value of the adhesive jig 6 is less than or equal to the set value. Step S4, Vacuum Adsorption Adhesive Fixture 6: After the radial runout value of adhesive fixture 6 is less than or equal to the set value, it indicates that the concentricity of adhesive fixture 6 is qualified. Start the vacuum generator and make the vacuum adsorption groove 3112 of the movable turntable 311 adsorb and fix adhesive fixture 6 under negative pressure, so as to firmly adsorb adhesive fixture 6 onto the upper surface of the movable turntable 311. Step S5: Place the rotating workpiece 7: After the adhesive jig 6 is firmly attached to the upper surface of the movable turntable 311, pause the servo drive motor 315, and then place the rotating workpiece 7 on the upper surface of the adhesive jig 6 that has been fixed by negative pressure. Step S6, Concentricity calibration of rotating workpiece 7: Restart the servo drive motor 315 and make the drive shaft 313 drive the movable turntable 311 to rotate slowly. Adjust the dial indicator frame 41 and make the probe of the dial indicator 42 contact the outer circumferential surface of the rotating workpiece 7. The dial indicator 42 monitors the radial runout of the rotating workpiece 7 in real time. The operator slowly pulls the upper thrust wrench 332, and the upper arc-shaped cam surface 3321 of the upper thrust wrench 332 deflects. Under the action of the reset elastic force of the upper compression spring 333, the left end of the upper transmission link 331 slowly deflects forward. Under the action of the upper parallel push block 334 and the upper limit stop block 335, the rotating workpiece 7 gradually moves towards the rotation center position of the movable turntable 311 until the radial runout value of the rotating workpiece 7 is less than or equal to the set value. Step S7, Flatness Inspection: After the concentricity of the rotating workpiece 7 is adjusted, the servo drive motor 315 is turned off and the movable turntable 311 stops rotating. Then, the upper end face of the rotating workpiece 7 is measured at multiple points using the height gauge 52 to determine the flatness of the upper end face of the rotating workpiece 7. If the flatness value of the upper end face of the rotating workpiece 7 is greater than the set value, the adhesive jig 6 is readjusted or replaced. Step S8, dispensing operation: After confirming that the flatness value of the upper end face of the rotating workpiece 7 is less than or equal to the set value, it means that the flatness of the upper end face of the rotating workpiece 7 is qualified. Start the dispensing assembly 2 and dispense glue to the joint between the rotating workpiece 7 and the adhesive fixture 6. During this process, the servo drive motor 315 starts and the movable turntable 311 drives the adhesive fixture 6 and the rotating workpiece 7 to rotate, so that the joint between the rotating workpiece 7 and the adhesive fixture 6 is automatically dispensed one full circle. Step S9, Unloading: After the dispensing assembly 2 completes the dispensing operation, turn off the vacuum generator and wait for the adhesive to solidify. Then remove the bonded rotating workpiece 7 and the adhesive fixture 6, and then proceed to the next cycle.

[0051] Through the above steps, the dispensing process of this embodiment nine can effectively ensure the centering accuracy between the rotating workpiece 7 and the adhesive fixture 6. On the other hand, it can realize the flatness detection of the end face of the rotating workpiece 7 through online detection, so as to detect defects on the end face of the rotating workpiece 7 in time through preventive detection before dispensing and reduce the risk of subsequent processing.

[0052] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A precision dispensing equipment integrated with online detection and automatic centering, comprising a frame (1), a dispensing assembly (2) installed on the frame (1), characterized in that: The frame (1) is also equipped with an automatic centering component (3), a radial runout detection component (4), and an end face flatness detection component (5); The automatic centering assembly (3) includes a rotary table (31), which includes a movable turntable (311) rotatably mounted on the upper side of the frame (1) and arranged horizontally. The upper surface of the movable turntable (311) is a fixture placement surface (3111), and a vacuum adsorption groove (3112) is provided in the middle area of ​​the fixture placement surface (3111) of the movable turntable (311). The core of the movable turntable (311) is provided with a turntable adsorption hole (3113) that is vertically penetrating and connected to the vacuum adsorption groove (3112). The frame (1) is rotatably mounted with a drive shaft (311) arranged vertically and coaxial with the movable turntable (311) via a bearing seat (312). 3) The upper end of the drive shaft (313) extends to the upper side of the frame (1) and the upper end of the drive shaft (313) is connected to the movable turntable (311). The core of the drive shaft (313) is provided with a vertical through hole (3131) that is aligned and connected to the turntable suction hole (3113) of the movable turntable (311). The lower end of the drive shaft (313) is provided with a rotary joint (314) connected to the vacuum generator through a pipe at the lower opening of the shaft suction hole (3131). The frame (1) is provided with a servo drive motor (315) corresponding to the drive shaft (313). The servo drive motor (315) is connected to the drive shaft (313) in a drive connection. The automatic centering assembly (3) also includes a jig centering adjustment mechanism (32) for causing the adhesive jig (6) to move horizontally, and a workpiece positioning adjustment mechanism for causing the rotating workpiece (7) to move horizontally. The radial runout detection assembly (4) includes a dial indicator (41) mounted on the frame (1) and a dial indicator (42) mounted on the upper end of the dial indicator (41). The dial indicator (41) is an adjustable support. The end face flatness detection component (5) includes a height gauge bracket (51) mounted on the frame (1) and a height gauge (52) mounted on the upper end of the height gauge bracket (51) and located on the upper side of the movable turntable (311). The height gauge bracket (51) is an adjustable bracket.

2. The precision dispensing apparatus with integrated online detection and automatic centering according to claim 1, wherein: The automatic centering component (3) also includes a left support (34) located on the left side of the rotation center of the movable turntable (311) and a right support (35) located on the right side of the rotation center of the movable turntable (311). The left support (34) and the right support (35) are respectively screwed onto the frame (1). The fixture centering adjustment mechanism (32) includes a lower transmission link (321) and a lower thrust wrench (322) arranged horizontally. The workpiece centering adjustment mechanism (33) includes an upper transmission link (331) and an upper thrust wrench (332) arranged horizontally. The upper transmission link (331) is located on the upper end side of the lower transmission link (321), and the upper thrust wrench (332) is located on the upper end side of the lower thrust wrench (322). The right ends of the upper transmission link (331) and the lower transmission link (321) are hinged to the right support (35) via a vertically arranged right pivot (37). The right ends of the upper thrust wrench (332) and the lower thrust wrench (322) are hinged to the left support (34) via a vertically arranged left pivot (36). The right end of the upper thrust wrench (332) is provided with an upper arc-shaped cam surface (3321), and the right end of the lower thrust wrench (322) is provided with a lower arc-shaped cam surface (3221). The left end of the upper transmission link (331) The upper part extends to the rear end of the upper thrust wrench (332) and the upper arc-shaped cam surface (3321) is in line contact with the left end of the upper transmission link (331). The left end of the lower transmission link (321) extends to the rear end of the lower thrust wrench (322) and the lower arc-shaped cam surface (3221) is in line contact with the left end of the lower transmission link (321). The upper end of the left side support (34) is equipped with an upper compression spring (333) that elastically abuts against the left end of the upper transmission link (331) and a lower compression spring (323) that elastically abuts against the left end of the lower transmission link (321). The upper transmission link (331) is provided with an upper parallel push block (334) and an upper limit stop block (335) located on the left side of the upper parallel push block (334). The center of the upper parallel push block (334) is aligned with the rotation center of the movable turntable (311). The lower transmission link (321) is provided with a lower parallel push block (324) and a lower limit stop block (325) located on the left side of the lower parallel push block (324). The center of the lower parallel push block (324) is aligned with the rotation center of the movable turntable (311).

3. The precision dispensing apparatus with integrated online detection and automatic centering of claim 2, wherein: The rear end of the upper parallel push block (334) is provided with a first screw mounting hole (3341) that extends vertically through and along the front-back direction. A first locking screw is installed in the first bolt mounting hole. The first locking screw is screwed to the upper transmission link (331), and the upper parallel push block (334) is locked and fixed to the upper transmission link (331) by the first locking screw. The upper limit stop (335) has a second screw mounting hole (3351) that extends vertically through and along the left and right directions. A second locking screw is installed in the second screw mounting hole (3351). The upper limit stop (335) is locked and fixed to the upper transmission link (331) by the second locking screw.

4. The precision dispensing apparatus with integrated online detection and automatic centering of claim 2, wherein: The lower parallel push block (324) and the lower transmission link (321) are an integral structure, and the lower limit block (325) is screwed onto the lower transmission link (321).

5. The precision dispensing apparatus with integrated online detection and automatic centering of claim 2, wherein: The right pivot (37) is fastened to the right support (35), and the right end of the upper transmission link (331) and the right end of the lower transmission link (321) are pivotally connected to the right pivot (37) through bearings respectively. The left pivot (36) is fastened to the left support (34), and the right end of the upper thrust wrench (332) and the right end of the lower thrust wrench (322) are pivotally connected to the left pivot (36) through bearings respectively.

6. The precision dispensing apparatus with integrated online detection and automatic centering of claim 2, wherein: The left support (34) has spring positioning holes (341) for the upper compression spring (333) and the lower compression spring (323), respectively, and the upper compression spring (333) and the lower compression spring (323) are respectively installed in the corresponding spring positioning holes (341).

7. The precision dispensing apparatus with integrated online detection and automatic centering of claim 1, wherein: The upper surface of the movable turntable (311) is provided with a diamond-like carbon (DLC) coating.

8. The precision dispensing apparatus with integrated online detection and automatic centering of claim 1, wherein: The frame (1) is screwed with a motor mounting base (316) corresponding to the servo drive motor (315), and the servo drive motor (315) is screwed into the motor mounting base (316). The power output shaft of the servo drive motor (315) is equipped with an active synchronous pulley (317), and the lower end of the drive shaft (313) is equipped with a driven synchronous pulley (318). A transmission synchronous belt (319) is wound between the active synchronous pulley (317) and the driven synchronous pulley (318).

9. A dispensing process, characterized by: This dispensing process is based on the precision dispensing equipment with integrated online detection and automatic centering as described in any one of claims 1-8; The dispensing process includes the following steps, specifically: Step S1: Adjust the position of the upper limit stop (335): Adjust the left and right positions of the upper limit stop (335) according to the diameter of the rotating workpiece (7) so that the distance between the workpiece contact position of the upper limit stop (335) and the center plane of the upper parallel push block (334) is adapted to the radius value of the rotating workpiece (7). Step S2, Place the adhesive fixture (6): Place the adhesive fixture (6) on the fixture placement surface (3111) of the movable turntable (311), and make the lower surface of the adhesive fixture (6) cover the vacuum adsorption groove (3112) on the upper surface of the movable turntable (311). Step S3, Concentricity calibration of adhesive jig (6): Start the servo drive motor (315) and make the drive shaft (313) drive the movable turntable (311) to rotate slowly. Adjust the dial indicator frame (41) and make the probe of the dial indicator (42) contact the outer circumferential surface of the adhesive jig (6). The dial indicator (42) monitors the radial runout of the adhesive jig (6) in real time. The operator slowly pulls the lower thrust wrench (322), and the lower arc-shaped cam surface (3221) of the lower thrust wrench (322) deflects. Under the action of the reset spring force of the lower compression spring (323), the left end of the lower transmission link (321) slowly deflects forward. Under the action of the lower parallel push block (324) and the lower limit stop block (325), the adhesive jig (6) gradually moves towards the rotation center position of the movable turntable (311) until the radial runout value of the adhesive jig (6) is less than or equal to the set value. Step S4, Vacuum Adsorption Adhesive Fixture (6): When the radial runout value of the adhesive fixture (6) is less than or equal to the set value, it indicates that the concentricity of the adhesive fixture (6) is qualified. Start the vacuum generator and make the vacuum adsorption groove (3112) of the movable turntable (311) adsorb and fix the adhesive fixture (6) under negative pressure, so as to firmly adsorb the adhesive fixture (6) onto the upper surface of the movable turntable (311). Step S5, Place the rotating workpiece (7): After the adhesive jig (6) is firmly attached to the upper surface of the movable turntable (311), pause the servo drive motor (315), and then place the rotating workpiece (7) on the upper surface of the adhesive jig (6) that has been fixed by negative pressure. Step S6, Concentricity calibration of rotating workpiece (7): Restart the servo drive motor (315) and make the drive shaft (313) drive the movable turntable (311) to rotate slowly. Adjust the dial indicator frame (41) and make the probe of the dial indicator (42) contact the outer circumferential surface of the rotating workpiece (7). The dial indicator (42) monitors the radial runout of the rotating workpiece (7) in real time. The operator slowly pulls the upper thrust wrench (332), and the upper arc-shaped cam surface (3321) of the upper thrust wrench (332) deflects. Under the action of the reset spring force of the upper compression spring (333), the left end of the upper transmission link (331) slowly deflects forward. Under the action of the upper parallel push block (334) and the upper limit stop block (335), the rotating workpiece (7) gradually moves towards the rotation center position of the movable turntable (311) until the radial runout value of the rotating workpiece (7) is ≤ the set value. Step S7, Flatness Detection: After the concentricity of the rotating workpiece (7) is adjusted, the servo drive motor (315) is turned off and the movable turntable (311) stops rotating. Then, the upper end face of the rotating workpiece (7) is measured at multiple points using a height gauge (52) to determine the flatness of the upper end face of the rotating workpiece (7). If the flatness value of the upper end face of the rotating workpiece (7) is greater than the set value, the adhesive jig (6) is readjusted or replaced. Step S8, dispensing operation: After confirming that the flatness value of the upper surface of the rotating workpiece (7) is less than or equal to the set value, it means that the flatness of the upper surface of the rotating workpiece (7) is qualified. Start the dispensing assembly (2) and dispense glue at the joint between the rotating workpiece (7) and the adhesive fixture (6). During this process, the servo drive motor (315) starts and the movable turntable (311) drives the adhesive fixture (6) and the rotating workpiece (7) to rotate, so that the glue is automatically dispensed around the joint between the rotating workpiece (7) and the adhesive fixture (6) in one revolution. Step S9, Unloading: After the dispensing operation is completed in the dispensing assembly (2), turn off the vacuum generator and wait for the glue to solidify. Then remove the bonded rotating workpiece (7) and the adhesive fixture (6) and then proceed to the next cycle.

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