Ceramic ferrule concentricity finishing equipment

Abstract

The invention relates to the technical field of ceramic ferrule polishing, in particular to ceramic ferrule concentricity finishing equipment which comprises a rack, a front ejector pin, a rear ejector pin, a grinding wheel and a swing arm are horizontally arranged on the rack, and a measuring instrument and a processing unit are further arranged on the rack. An arc-shaped groove is formed in the other end of the swing arm, an adsorption hole is formed in the groove, the adsorption hole is connected with negative pressure equipment and adsorbs the ceramic ferrule through negative pressure, two polishing pieces are symmetrically arranged on the two sides of the groove relative to the adsorption hole, and polishing layers are arranged on the polishing pieces. According to the grinding device, the grinding piece is arranged, the outer circle of the ceramic ferrule is roughly ground under the condition that the grinding piece is attached to the ceramic ferrule, protruding particles on the outer circle of the ceramic ferrule are ground, the protruding particles on the ceramic ferrule are prevented from being impacted by a grinding wheel when the grinding wheel grinds the ceramic ferrule, and the coaxiality finishing quality of the ceramic ferrule is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ceramic ferrule polishing, in particular to a ceramic ferrule concentricity trimming device. BACKGROUND

[0002] The ceramic ferrule is a core precision element for precisely butting optical fibers in the field of optical communication, and mainly functions to ensure the accurate alignment of the cores of two optical fibers and realize the efficient transmission of optical signals. The ceramic ferrule is in the shape of a cylinder, and a tiny guide hole is located at the center of the cylinder and has a diameter matching that of the core of an optical fiber. The ceramic ferrule is mainly made of zirconia oxide. This material has high hardness (only inferior to diamond) and strong wear resistance, and can maintain the plug-in precision for a long time, and has good corrosion resistance and insulation. In order to reduce the insertion loss and return loss in signal transmission, the ceramic ferrule has very high requirements for the dimensional precision such as concentricity and roundness.

[0003] The existing ceramic ferrule concentricity trimming device adopts a method of fixing the ceramic ferrule by a thimble and then rotating the ceramic ferrule, and then trimming the outer circle of the ceramic ferrule from the side of the ceramic ferrule by a grinding wheel to improve the concentricity of the guide hole and the outer circle of the ceramic ferrule.

[0004] However, during the sintering process of the ceramic ferrule, some particles may protrude from the outer surface of the ceramic ferrule, and the protruding particles are sintered to the outer circle of the ceramic ferrule. The grinding wheel approaches the ceramic ferrule at a fixed feed speed, and when there are protruding particles on the outer circle of the ceramic ferrule and the grinding wheel approaches the outer circle of the ceramic ferrule, the ceramic ferrule rotates quickly with the protruding particles, and the grinding wheel fails to contact the protruding particles in the first time. When the grinding wheel contacts the outer circle of the ceramic ferrule, the protruding particles are again rotated to contact the grinding wheel, which causes impact and collision between the protruding particles and the grinding wheel. Although the protruding particles can be removed, the outer circle of the ceramic ferrule may be damaged to form a pit at the original position of the particles during the removal of the particles, thereby reducing the yield of the ceramic ferrule.

[0005] Therefore, the present application provides a ceramic ferrule concentricity trimming device. SUMMARY

[0006] The ceramic ferrule concentricity trimming device provided by the present application has the advantages that the polishing sheet is arranged on the adsorption groove of the rocker arm, and when the ceramic ferrule is fixed on the thimble by the rocker arm, the polishing sheet is first kept in contact with the ceramic ferrule to perform preliminary rough polishing when the thimble rotates the ceramic ferrule, thereby solving the problem of low yield caused by the collision between the protruding particles and the grinding wheel during the trimming of the concentricity of the ceramic ferrule.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A ceramic ferrule concentricity dressing device includes a frame. A front ejector pin and a rear ejector pin for clamping the ceramic ferrule are horizontally arranged on the frame. The front and rear ejector pins are located on the same horizontal axis. The rear ejector pin can extend and retract towards the front ejector pin via a pneumatic unit, and the front ejector pin can also move towards the rear ejector pin via a pneumatic unit. A first drive assembly for rotating the rear ejector pin is provided on the frame. A grinding wheel for dressing the outer diameter of the ceramic ferrule is provided on the frame. A first drive guide rail is provided on the frame for driving... The moving grinding wheel moves horizontally towards the ejector pin. The frame is also equipped with a swing arm for transporting the ceramic ferrule between the front and rear ejector pins. The frame is also equipped with a measuring instrument for measuring the outer diameter of the ceramic ferrule. The frame is also equipped with a processing unit. One end of the swing arm is rotatably mounted on the frame, and the other end of the swing arm is provided with an arc-shaped groove. The groove is provided with an adsorption hole. The adsorption hole is connected to a negative pressure device to adsorb the ceramic ferrule through negative pressure. Two grinding discs are symmetrically arranged on both sides of the groove about the adsorption hole. Each grinding disc is provided with a grinding layer.

[0008] The frame is also equipped with a second drive rail, which is responsible for moving the measuring instrument horizontally towards or away from the front ejector pin. The processing unit controls the extension and retraction of the front and rear ejector pins, and also controls the rotation and stopping of the rear ejector pin driven by the first drive assembly. Simultaneously, the processing unit also controls the movement of the first and second drive rails, the rotation of the swing arm, and the generation and stopping of negative pressure within the suction hole.

[0009] After the swing arm adsorbs the ceramic ferrule into the groove, the processing unit controls the swing arm to rotate and transport the ceramic ferrule between the front and rear ejector pins. The rear ejector pin then extends towards the front ejector pin, and the front ejector pin extends towards the rear ejector pin, together holding the ceramic ferrule cavity in place. At this time, the swing arm keeps the grinding disc inside the groove in contact with the ceramic ferrule. Then, the ejector pins drive the ceramic ferrule to rotate. As the ceramic ferrule rotates, the grinding disc performs preliminary coarse grinding on the outer circumference of the ceramic ferrule. The duration of this preliminary coarse grinding can be freely set. The grinding disc first grinds away any protruding particles on the outer circumference of the ceramic ferrule. During this coarse grinding, the impact of the protruding particles on the grinding disc is effectively reduced because the grinding disc is tightly attached to the outer circumference of the ceramic ferrule. This avoids high-speed impact when the grinding wheel comes into contact with the protruding particles on the high-speed rotating outer circumference of the ceramic ferrule, which could cause the ceramic ferrule to break. This helps improve the yield rate of the ceramic ferrule after concentric grinding and finishing.

[0010] After the initial grinding is completed, the processing unit controls the elimination of negative pressure inside the adsorption hole, the swing arm resets, and then the processing unit controls the first drive guide to move the grinding wheel towards the ceramic ferrule, allowing the grinding wheel to grind the outer circle of the ceramic ferrule at the set feed speed. Since the protruding particles on the outer circle of the ceramic ferrule have been ground off, there will be no surface chipping of the outer circle of the ceramic ferrule during the grinding process.

[0011] After the grinding wheel finishes grinding, the processing unit controls the second drive guide rail to move the measuring instrument toward the ceramic ferrule. The measuring instrument measures the outer circle of the ground ceramic ferrule. If it passes the test, the front ejector pin and the rear ejector pin move away from each other, and the ceramic ferrule is released. At this time, the concentricity of the ceramic ferrule is corrected.

[0012] The processing unit controls components such as the swing arm, grinding wheel, and measuring instrument to form an intelligent grinding equipment, which automatically grinds and measures the concentricity of ceramic inserts, helping to improve production efficiency and product quality stability.

[0013] Preferably, the grinding discs are all made of two-way shape memory alloy material. When the temperature of the grinding disc is lower than the abnormal temperature, the grinding disc forms an arc-shaped part, and the arc-shaped concave side of the arc-shaped part faces the center of the groove. When the temperature of the grinding disc is higher than the abnormal temperature, the grinding disc bends away from the center of the groove and fits against the surface of the swing arm. Metal contacts that cooperate with the grinding disc are provided on the surface of the swing arm on both sides of the groove. The metal contacts are electrically connected to the processing unit. The grinding discs are electrically connected to the processing unit. When the grinding discs come into contact with the metal contacts, a current loop is formed.

[0014] The grinding disc is made of two-way shape memory alloy and forms an arc-shaped part when the grinding disc is below the abnormal temperature. This allows the grinding disc to better fit the outer circular surface of the ceramic ferrule, thereby improving the effect of rough grinding. At the same time, because the arc-shaped part of the grinding disc clamps the ceramic ferrule, it can also effectively prevent the ceramic ferrule from falling off the groove when it is transported by the swing arm, further improving the stability of the ceramic ferrule during transportation.

[0015] When the grinding disc polishes the outer circumference of the ceramic ferrule, it generates heat. When the temperature of the grinding disc exceeds its abnormal operating temperature, it bends away from the center of the groove, thus coming into contact with the surface of the swing arm. At this point, the grinding disc comes into contact with the metal contacts, forming a current loop. The processing unit can use this loop to determine the change in the state of the grinding disc. When the loop is complete, it is determined that the initial polishing of the ceramic ferrule is finished, and the swing arm can then be controlled to reset, preparing to attract and fix the next ceramic ferrule into the groove.

[0016] Because the grinding disc bends away from the center of the groove when it exceeds the abnormal temperature, when the processing unit controls the swing arm to return to the initial position, the grinding disc will no longer have a clamping force on the ceramic insert fixed between the front and rear ejector pins. This ensures that the ceramic insert fixed between the front and rear ejector pins will not be removed from the fixing of the front and rear ejector pins due to the swing arm resetting, thus ensuring the stability of the equipment operation.

[0017] Preferably, a rubber head is provided inside the adsorption hole, and the rubber head is fixedly installed at the end of the adsorption hole, with the rubber head flush with the surface of the grinding disc. The rubber head helps to improve the fit between the adsorption hole and the ceramic ferrule, ensuring that the adsorption hole can adsorb the ceramic ferrule into the groove through negative pressure, thus ensuring the transfer effect of the ceramic ferrule.

[0018] Preferably, the swing arm has two sliding grooves inside, which are symmetrically arranged about the groove and located below the two grinding discs respectively. The sliding grooves are perpendicular to the adsorption hole and communicate with the adsorption hole. The surface of the swing arm also has two locking grooves corresponding to the two grinding discs. The two locking grooves are symmetrically arranged about the groove and communicate with the two sliding grooves respectively. Each grinding disc has a hook portion on the side away from the center of the groove. When the grinding disc is in contact with the surface of the swing arm, the hook portion extends into the corresponding locking groove. A slider is slidably installed inside each sliding groove. The slider and the sliding groove are connected by a mechanical seal. A spring is provided inside each sliding groove. The spring is used to push the slider away from the adsorption hole. The end of the slider away from the adsorption hole is provided with a locking part. The locking part is used to lock the hook portion when it extends into the locking groove. The top of the locking part is provided with a downwardly inclined guide portion.

[0019] When the grinding disc is above the abnormal temperature, it automatically deforms, allowing the hook portion to extend into the locking groove. As the hook portion extends into the locking groove, its bottom presses against the guide portion at the top of the locking part. Because the guide portion is inclined, the hook portion exerts a horizontal force on it. The slider and locking part, subjected to this horizontal force, move horizontally towards the suction hole to avoid the hook portion. Once the hook portion passes the locking part, the spring drives the slider and locking part to return to their original positions. At this point, the locking part inserts into the hook portion, securing it within the locking groove. When the temperature is below the abnormal temperature, the grinding disc bends to form an arc shape. However, because the hook portion is locked within the locking groove, the arc shape cannot return to its original position. This allows for a longer grinding disc length, ensuring that the grinding disc, when forming the arc shape, covers the outer circumference of the ceramic ferrule as much as possible, further preventing impact between protruding particles on the ceramic ferrule and the grinding disc.

[0020] Furthermore, since the grinding disc will revert to its arc shape after cooling to its abnormal temperature, and this arc shape can hinder the ceramic ferrule from entering the groove, the addition of hooks and locking parts prevents the arc shape from obstructing the ceramic ferrule's entry into the groove before the swing arm adsorbs it. This further improves the stability of the equipment during operation.

[0021] When the adsorption hole begins to adsorb the ceramic insert that has entered the groove, the negative pressure inside the adsorption hole will adsorb the slider because the ceramic insert seals the adsorption hole. The slider moves along the groove towards the adsorption hole, and the locking part separates from the hook part. At this time, the grinding disc drops to an abnormal temperature, and the hook part leaves the locking groove under the elastic force of the grinding disc. The grinding disc loses the restriction of the locking part and forms an arc part to cover the ceramic insert, thereby ensuring that the grinding disc can effectively perform preliminary rough grinding on the ceramic insert.

[0022] Preferably, the top of each slider facing the adsorption hole is provided with an inclined first guide slope, and the bottom of the rubber head is provided with two second guide slopes corresponding to the two first guide slopes. When negative pressure is generated inside the adsorption hole, the slider slides towards the adsorption hole and causes the first guide slope to squeeze the second guide slope.

[0023] As the slider moves towards the adsorption hole, the first guide ramp at the top of the slider presses against the second guide ramp of the rubber head, causing the rubber head to deform and rise above the surfaces of the two grinding discs. This allows the rubber head to make better contact with the ceramic ferrule, preventing air leakage during contact and thus improving the adsorption force on the ceramic ferrule, ensuring stability during the ceramic ferrule's transport.

[0024] The sliding stroke of the slider can be preset by the length of the groove to ensure that the deformation range of the rubber head is within a reasonable range, which can meet the requirements of tight adsorption without damaging the rubber head due to excessive compression.

[0025] Preferably, a vent hole is provided at the end of the slider near the adsorption hole. The vent hole penetrates the slider, and the axial direction of the vent hole is the same as the axial direction of the adsorption hole. The purpose of the vent hole is to prevent the slider from moving excessively towards the adsorption hole due to the negative pressure, which could cause the adsorption hole to become blocked. This avoids the situation where the negative pressure cannot adsorb the ceramic insert at the port of the adsorption hole after the adsorption hole is blocked, which could cause the ceramic insert to loosen and fall off during transportation, thus further improving the stability of the equipment during operation.

[0026] Preferably, when the polishing disc is below the abnormal temperature, an arc-shaped guide portion is formed at the end of the polishing disc away from the adsorption hole, and the concave side of the arc-shaped portion is in the opposite direction to the concavity of the arc-shaped portion. The guide portion creates a gradually decreasing angle between the polishing disc and the outer surface of the ceramic ferrule, which guides the protruding particles on the outer circumference of the ceramic ferrule, preventing the protruding particles on the ceramic ferrule from directly impacting the polishing disc. This ensures that the surface of the ceramic ferrule will not be damaged by impact and form pits, thus guaranteeing the product quality after the ceramic ferrule undergoes concentricity finishing polishing.

[0027] Preferably, the swing arm swings along a vertical plane, and when the swing arm delivers the ceramic insert between the front and rear ejector pins, the adsorption hole is located above the ceramic insert and adsorbs it.

[0028] By setting the swing arm to swing up and down, so that the swing arm is above the ceramic insert when the ceramic insert is clamped by the front and rear ejector pins, it helps to further prevent debris from entering the adsorption hole after the ceramic insert is coarsely ground, further avoids the adsorption hole from being blocked, and ensures the stability of the equipment operation.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The ceramic ferrule concentricity trimming device designed in this invention sets a grinding disc inside the groove of the ceramic ferrule transfer mechanism. After the swing arm transfers the ceramic ferrule to the front and rear ejector pins, the grinding disc keeps in contact with the ceramic ferrule while rough grinding the outer circle of the ceramic ferrule. This grinds off the protruding particles on the outer circle of the ceramic ferrule, avoiding the impact of the grinding wheel on the protruding particles on the ceramic ferrule during grinding, and ensuring the quality of the coaxiality trimming of the ceramic ferrule.

[0030] 2. The ceramic ferrule concentricity trimming device designed in this invention uses a grinding disc made of a two-way shape memory alloy. At temperatures below the abnormal temperature range, the grinding disc forms an arc shape that better conforms to the ceramic ferrule, improving the rough grinding effect. Simultaneously, the arc shape prevents the ceramic ferrule from falling out of the groove during transport by the swing arm, improving the stability of the ceramic ferrule during transport. Furthermore, the heat generated during rough grinding automatically releases the ceramic ferrule from the grinding disc, and feedback is sent to the processing unit via metal contacts, enhancing the automation and intelligence of the equipment.

[0031] 3. The ceramic ferrule concentricity trimming device designed in this invention is further provided with a hook part and a snap-fit ​​part. By utilizing the shape change of the grinding disc made of double-pass shape memory alloy, the grinding disc automatically inserts the hook part into the locking groove after the temperature of the grinding disc exceeds the abnormal temperature. The snap-fit ​​part is used to fix the hook part from inside the locking groove, which prevents the grinding disc from returning to the arc shape before the ceramic ferrule enters the groove and affecting the entry of the ceramic ferrule into the groove, thus effectively ensuring the operational stability of the device. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 5 This is a top view of the swing arm in this invention; Figure 6 For the present invention Figure 5 Sectional view at point BB; Figure 7 For the present invention Figure 6 Enlarged view of point C in the middle; Figure 8 This is a schematic diagram of the structure of the grinding disc in this invention when it is above the abnormal temperature; Figure 9 For the present invention Figure 8 Enlarged view at point D; Figure 10 This is a schematic diagram of the structure of the present invention when the snap-fit ​​part snaps into the hook part and the grinding disc is below the abnormal temperature.

[0033] In the diagram: 1. Frame; 2. Front ejector pin; 3. Rear ejector pin; 4. First drive assembly; 5. Grinding wheel; 6. First drive guide rail; 7. Swing arm; 8. Measuring instrument; 9. Processing unit; 10. Groove; 11. Adsorption hole; 12. Grinding disc; 13. Grinding layer; 14. Arc-shaped part; 15. Metal contact; 16. Rubber head; 17. Slide groove; 18. Locking groove; 19. Hook part; 20. Slider; 21. Spring; 22. Snap-fit ​​part; 23. Guide part; 24. First guide ramp; 25. Second guide ramp; 26. Vent hole; 27. Guide part; 28. Second drive guide rail; 29. ​​Second drive assembly; 30. Pneumatic unit. Detailed Implementation

[0034] Please see Figures 1 to 10 This invention provides a ceramic ferrule concentricity adjustment device, the technical solution of which is as follows: A ceramic ferrule concentricity adjustment device, reference Figures 1 to 3The system includes a frame 1, on which a front ejector pin 2 and a rear ejector pin 3 are horizontally mounted for clamping ceramic inserts. The front ejector pin 2 and rear ejector pin 3 are located on the same horizontal axis. The rear ejector pin 3 can extend and retract towards the front ejector pin 2 via a pneumatic unit 30. The front ejector pin 2 is also controlled by another pneumatic unit 30 to move towards the rear ejector pin 3. A first drive assembly 4, which is a motor, is mounted on the frame 1 to drive the rear ejector pin 3 to rotate. A grinding wheel 5, also driven by a motor, is mounted on the frame 1 to dress the outer diameter of the ceramic insert. A first drive guide rail 6 is mounted on the frame 1 to move the grinding wheel 5 horizontally towards or away from the ejector pin. A second drive guide rail 28 is also mounted on the frame 1 to move the measuring instrument 8 horizontally towards or away from the front ejector pin 2.

[0035] The frame 1 is also equipped with a swing arm 7 for transporting the ceramic ferrule between the front ejector pin 2 and the rear ejector pin 3. The swing arm 7 is controlled by a second drive assembly 29 and swings along a vertical plane. The second drive assembly 29 is also a motor. When the swing arm 7 delivers the ceramic ferrule between the front ejector pin 2 and the rear ejector pin 3, the adsorption hole 11 is located above the ceramic ferrule and adsorbs it. The frame 1 is also equipped with a measuring instrument 8 for measuring the outer diameter of the ceramic ferrule.

[0036] refer to Figures 1 to 3 The frame 1 is also equipped with a processing unit 9. The processing unit 9 can be a microcontroller control system, a computer host, or other device capable of receiving, processing, and feeding back data to control other units (such as the first drive rail 6, the first drive assembly 4, the second drive rail 28, and the grinding wheel 5). The processing unit 9 is responsible for controlling the extension and retraction of the front ejector pin 2 and the rear ejector pin 3, and for controlling the rotation and stopping of the rear ejector pin 3 driven by the first drive assembly 4. Simultaneously, the processing unit 9 is also responsible for controlling the movement of the first drive rail 6 and the second guide rail, the rotation of the swing arm 7, and the generation and stopping of negative pressure within the suction hole 11.

[0037] refer to Figures 1 to 6 One end of the swing arm 7 is rotatably mounted on the frame 1, and the other end of the swing arm 7 is provided with an arc-shaped groove 10. An adsorption hole 11 is provided inside the groove 10. The adsorption hole 11 is connected to an external negative pressure generating device, which can be a vacuum generator. The connection port on the back of the swing arm 7 is connected to the adsorption hole 11, and the vacuum generator can be connected to the connection port on the back of the swing arm 7 to provide negative pressure inside the adsorption hole 11. The adsorption hole 11 adsorbs the ceramic insert into the groove 10 through negative pressure. Two grinding discs 12 are symmetrically arranged on both sides of the groove 10 about the adsorption hole 11. The grinding discs 12 are fixedly connected inside the groove 10, and each grinding disc 12 is provided with a grinding layer 13.

[0038] refer to Figure 4 as well asFigure 6 All polishing discs 12 are made of two-way shape memory alloy. When the temperature of the polishing disc 12 is below the abnormal temperature, an arc-shaped portion 14 is formed in the polishing disc 12, and the arc-shaped concave side of the arc-shaped portion 14 faces the center of the groove 10. When the temperature of the polishing disc 12 is below the abnormal temperature, an arc-shaped guide portion 27 is also formed at the end of the polishing disc 12 away from the adsorption hole 11, and the concave side of the arc-shaped portion 14 is opposite to the concave direction of the arc-shaped portion 14.

[0039] The temperature can be set within the range of 40℃-50℃, depending on the actual situation. Setting the abnormal temperature between 40℃ and 50℃ serves two purposes: firstly, the ambient temperature during production generally does not reach 40℃. This ensures that the grinding disc 12 is in the arc-shaped portion 14 before grinding the ceramic ferrule, preventing the grinding disc 12 from failing to form the arc-shaped portion 14 and ensuring the equipment operates according to the set parameters. Secondly, since the grinding disc 12 only performs preliminary rough grinding on the ceramic ferrule, the grinding time does not need to be set too long. Setting the abnormal temperature within the range of 40℃-50℃ allows the grinding disc 12 to exceed the abnormal temperature more quickly during rough grinding of the ceramic ferrule, thereby reducing wear on the grinding layer 13. Furthermore, setting the transformation temperature within the range of 40℃-50℃ helps the grinding disc 12 to cool down quickly and naturally after the initial rough grinding of the ceramic ferrule, allowing it to fall below the transformation temperature and quickly return to the state of the arc-shaped portion 14 for the next processing operation. This ensures the operating speed of the equipment and guarantees the efficiency of concentricity adjustment and grinding of the ceramic ferrule. In this embodiment, the transformation temperature of the grinding disc 12 is selected as 45℃.

[0040] refer to Figure 8 and Figure 10 When the temperature of the grinding disc 12 is higher than the abnormal temperature, the grinding disc 12 bends away from the center of the groove 10 and fits against the surface of the swing arm 7. Metal contacts 15 that cooperate with the grinding disc 12 are provided on the surfaces of the swing arms 7 on both sides of the groove 10. The metal contacts 15 are electrically connected to the processing unit 9, and the grinding disc 12 is also electrically connected to the processing unit 9. When the grinding disc 12 contacts the metal contacts 15, a current circuit is formed. When the temperature of the grinding disc 12 is higher than the abnormal temperature, when the grinding disc 12 fits against the swing arm 7, the end of the grinding disc 12 furthest from the groove 10 fits against the metal contact 15. Thus, when the temperature of the grinding disc 12 is lower than the abnormal temperature, the furthest end of the grinding disc 12 deforms and lifts up, automatically detaching from the metal contact 15. This allows the processing unit 9 to identify the state of the grinding disc 12, facilitating the program control of the equipment.

[0041] refer to Figures 6 to 8The swing arm 7 has two sliding grooves 17 inside. The two sliding grooves 17 are symmetrically arranged about the groove 10 and are located below the two grinding discs 12 respectively. The sliding grooves 17 are perpendicular to the adsorption hole 11 and are connected to the adsorption hole 11. The surface of the swing arm 7 is also provided with two locking grooves 18 corresponding to the two grinding discs 12. The two locking grooves 18 are symmetrically arranged about the groove 10 and are connected to the two sliding grooves 17 respectively. Each grinding disc 12 has a hook portion 19 on the side facing away from the center of the groove 10. When the grinding disc 12 is in contact with the surface of the swing arm 7, the hook portion 19 extends into the corresponding locking groove 18. A slider 20 is slidably installed inside the slide groove 17. A spring 21 is installed inside the slide groove 17. The spring 21 is used to push the slider 20 away from the adsorption hole 11. A snap-fit ​​portion 22 is provided at the end of the slider 20 away from the adsorption hole 11. The snap-fit ​​portion 22 is used to lock the hook portion 19 when it extends into the locking groove 18. A downwardly inclined guide portion 23 is provided at the top of the snap-fit ​​portion 22.

[0042] refer to Figure 6 A vent hole 26 is provided at one end of the slider 20 near the adsorption hole 11. The vent hole 26 passes through the slider 20, and the axial direction of the vent hole 26 is the same as the axial direction of the adsorption hole 11.

[0043] In addition, refer to Figure 6 and Figure 7 A rubber head 16 is installed inside the adsorption hole 11. The rubber head 16 is fixedly installed at the end of the adsorption hole 11 and is flush with the surface of the grinding disc 12 in its natural state. The top of the slider 20 facing the adsorption hole 11 is provided with an inclined first guide ramp 24. The bottom of the rubber head 16 is provided with two second guide ramps 25 corresponding to the two first guide ramps 24. When a negative pressure is generated inside the adsorption hole 11, the slider 20 slides towards the adsorption hole 11, causing the first guide ramps 24 to press against the second guide ramps 25. When the rubber head 16 is in contact with the top of the slider 20 under the guidance of the first guide ramps 24 and the second guide ramps 25, the top surface of the rubber head 16 exceeds the surface of the grinding disc 12 by 1 mm.

[0044] During use, refer to Figure 10 This ensures that in the initial state, the hook portion 19 is inserted into the locking groove 18 and locked by the snap-fit ​​portion 22. The temperature of the grinding disc 12 is lower than the abnormal temperature, and the grinding disc 12 forms an arc-shaped portion 14. However, since the hook portion 19 is locked by the snap-fit ​​portion 22, the groove 10 is in the open state at this time.

[0045] Subsequently, reference Figures 1 to 10The processing unit 9 controls the swing arm 7 to rotate to the position where the ceramic insert to be polished is stored. Then, the processing unit 9 activates the external negative pressure generating device to create a negative pressure inside the adsorption hole 11. After the negative pressure is formed, the ceramic insert is adsorbed and fixed inside the groove 10, the rubber head 16 is blocked by the ceramic insert, and the adsorption hole 11 is blocked. Since the adsorption hole 11 is blocked by the ceramic insert, the negative pressure inside the adsorption hole 11 begins to pull the two sliders 20 along the direction of the slide groove 17 toward the adsorption hole 11. After the sliders 20 slide toward the adsorption hole 11, the locking part 22 disengages from the hook part 19, and the spring 21 is compressed. Since the locking part 22 is no longer restricted, the hook part 19 is driven by the polishing disc 12 to move to the outside of the locking groove 18 under the elastic force of the polishing disc 12 itself. The two arc-shaped parts 14 formed by the two polishing discs 12 then hold the outer circle of the ceramic insert from both sides. The polishing layer 13 on the concave side of the arc-shaped part 14 is in contact with the outer circle of the ceramic insert.

[0046] Then, refer to Figure 2 , Figure 6 The processing unit 9 controls the second drive assembly 29 to drive the swing arm 7 to move. The swing arm 7 is controlled by the second drive assembly 29 and drives the ceramic ferrule to rotate from above between the front ejector pin 2 and the rear ejector pin 3. During the rotation of the swing arm 7, as the slider 20 slides towards the suction hole 11, the first guide ramp 24 on the slider 20 will squeeze the second guide ramp 25 at the bottom of the rubber head 16. The rubber head 16 is slightly pushed towards the ceramic ferrule, making the rubber head 16 fit more closely to the surface of the ceramic ferrule, preventing the ceramic ferrule from falling off during the transfer process by the swing arm 7 due to poor sealing at the end of the suction hole 11. The arc-shaped part 14 can also prevent the ceramic ferrule from falling off during the transfer process by clamping the outer circle of the ceramic ferrule.

[0047] When the ceramic insert is moved between the front ejector pin 2 and the rear ejector pin 3 by the swing arm 7, the processing unit 9 controls the pneumatic unit 30 to extend the front ejector pin 2 towards the rear ejector pin 3, and simultaneously controls the pneumatic unit 30 to extend the rear ejector pin 3 towards the front ejector pin 2. The front ejector pin 2 and the rear ejector pin 3 clamp and fix the ceramic insert from both ends. At this time, the swing arm 7 remains stationary, allowing the arc-shaped part 14 formed by the grinding disc 12 to maintain the state of clamping the outer circle of the ceramic insert from the outside. Under the action of the grinding disc 12, the grinding layer 13 and the outer circle of the ceramic insert remain in contact with the outer circle of the ceramic insert.

[0048] At this time, refer to Figures 1 to 4 as well as Figure 6The processing unit 9 controls the first drive assembly 4 to rotate the rear ejector pin 3. The rear ejector pin 3 drives the ceramic ferrule to rotate at a speed of 300 r / min to begin the initial rough grinding operation. At this time, if there are protruding particles formed during sintering on the outer circle of the ceramic ferrule, these protruding particles will be ground smooth by the grinding layer 13 that is in contact with the outer circle of the ceramic ferrule. At the same time, the guide part 27 guides the protruding particles on the outer circle of the ceramic ferrule, preventing the protruding particles from directly hitting the grinding disc 12, ensuring that the surface of the ceramic ferrule will not be damaged by impact and form pits, thereby improving the product quality after concentricity finishing and grinding.

[0049] During the polishing process of the ceramic insert by the polishing disc 12, the processing unit 9 controls the external negative pressure generating device to stop generating negative pressure. The slider 20, no longer pulled by negative pressure, is pushed back to its original position away from the adsorption hole 11 by the elastic force of the spring 21. The rubber head 16, after losing the compression of the first guide ramp 24, also resets under its own elastic force. Simultaneously, to prevent debris generated during polishing from entering the adsorption hole 11, the processing unit 9 can also control the external negative pressure generating device to blow air into the adsorption hole 11.

[0050] refer to Figures 6 to 10 Due to the continuous frictional contact between the polishing layer 13 and the outer circle of the ceramic insert, the polishing layer 13 generates heat and transfers the heat to the polishing disc 12. When the temperature of the polishing disc 12 exceeds 45°C, the polishing disc 12 made of shape memory metal begins to deform automatically. The polishing disc 12 bends away from the center of the groove 10 and fits against the surface of the swing arm 7. When the grinding disc 12 is in contact with the swing arm 7, the hook portion 19 on the grinding disc 12 re-enters the locking groove 18. The bottom of the hook portion 19 presses against the guide portion 23 at the top of the snap-fit ​​portion 22. The inclined guide portion 23 generates a horizontal force after being pressed. The slider 20 and the snap-fit ​​portion 22 move horizontally towards the suction hole 11 to avoid this force. When the hook portion 19 passes the snap-fit ​​portion 22, the spring 21 will drive the slider 20 and the snap-fit ​​portion 22 to return to their original positions. At this time, the snap-fit ​​portion 22 inserts into the hook portion 19 and re-locks the hook portion 19 into the locking groove 18. When the grinding disc 12 is in contact with the surface of the swing arm 7, the friction disc will contact the metal contact 15 on the surface of the swing arm 7 and form a current circuit. After the processing unit 9 detects the formation of a current loop, it controls the first drive assembly 4 to stop rotating the ceramic ferrule. Then, the processing unit 9 controls the swing arm 7 to reset, preparing to pick up the next ceramic ferrule to be polished, and allows the polishing disc 12 to cool naturally to below 45°C. Alternatively, before the swing arm 7 picks up the next ceramic ferrule to be polished, coolant can be dripped onto the polishing disc 12 to rapidly cool it to below 45°C.

[0051] refer to Figure 3After the swing arm 7 resets, the processing unit 9 controls the first drive guide rail 6 to drive the grinding wheel 5, which rotates at 2000 r / min, to move towards the ceramic ferrule at a set feed speed. Simultaneously, the processing unit 9 re-controls the second drive assembly 29 to drive the ceramic ferrule to rotate at 1500 r / min. The grinding wheel 5 performs fine grinding on the outer circle of the ceramic ferrule to ensure that the concentricity of the ceramic ferrule meets production requirements. Since the ceramic ferrule has already undergone preliminary rough grinding by the grinding disc 12, the outer surface of the ceramic ferrule is flat and free of protruding particles. Therefore, when the grinding wheel 5 contacts the outer circle of the ceramic ferrule, the impact force between the ceramic ferrule and the grinding wheel 5 can be significantly reduced by setting the feed speed. This avoids the ceramic ferrule from breaking due to impact between protruding particles and the grinding wheel 5, effectively ensuring the quality stability of ceramic ferrule production.

[0052] refer to Figure 1 After the grinding wheel 5 finishes grinding the outer diameter of the ceramic ferrule, the processing unit 9 controls the first drive guide rail 6 to reset the grinding wheel 5. Then, the processing unit 9 controls the second drive guide rail 28 to move the measuring instrument 8 towards the ground ceramic ferrule. The measuring instrument 8 measures the outer diameter of the ceramic ferrule. If it meets production requirements, the processing unit 9 controls the pneumatic unit 30 to reset the front ejector pin 2 and rear ejector pin 3, and the ceramic ferrule automatically falls onto the lower frame 1 for collection. If the measuring instrument 8 determines that the outer diameter of the ceramic ferrule does not meet requirements, the processing unit 9 controls the grinding wheel 5 to re-grind the ceramic ferrule. This allows for automated and intelligent grinding of the ceramic ferrule using intelligent grinding equipment.

[0053] After polishing one ceramic ferrule, repeat the above steps to continuously adjust the concentricity of multiple ceramic ferrules.

[0054] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A ceramic ferrule concentricity trimming device, comprising a frame (1), wherein a front ejector pin (2) and a rear ejector pin (3) for clamping the ceramic ferrule are horizontally arranged on the frame (1), the front ejector pin (2) and the rear ejector pin (3) are located on the same horizontal axis, a first drive assembly (4) for driving the rear ejector pin (3) to rotate is provided on the frame (1), a grinding wheel (5) for trimming the outer diameter of the ceramic ferrule is provided on the frame (1), a first drive guide rail (6) is provided on the frame (1), the first drive guide rail (6) is used to drive the grinding wheel (5) to move horizontally in the direction of the ejector pin, a swing arm (7) for transporting the ceramic ferrule between the front ejector pin (2) and the rear ejector pin (3) is also provided on the frame (1), a measuring instrument (8) for measuring the outer diameter of the ceramic ferrule is also provided on the frame (1), and a processing unit (9) is also provided on the frame (1), characterized in that, One end of the swing arm (7) is rotatably mounted on the frame (1), and the other end of the swing arm (7) is provided with an arc-shaped groove (10). An adsorption hole (11) is provided inside the groove (10). The adsorption hole (11) is connected to an external negative pressure generating device to adsorb ceramic inserts through negative pressure. Two grinding discs (12) are symmetrically arranged on both sides of the groove (10) about the adsorption hole (11). A grinding layer (13) is provided on each grinding disc (12).

2. The ceramic ferrule concentricity adjustment device according to claim 1, characterized in that, The polishing discs (12) are all made of two-way shape memory alloy material. When the temperature of the polishing disc (12) is lower than the abnormal temperature, the polishing disc (12) forms an arc-shaped part (14), and the arc-shaped concave side of the arc-shaped part (14) faces the center of the groove (10). When the temperature of the polishing disc (12) is higher than the abnormal temperature, the polishing disc (12) bends away from the center of the groove (10) and fits against the surface of the swing arm (7). The surfaces of the swing arms (7) on both sides of the groove (10) are provided with metal contacts (15) that cooperate with the polishing disc (12). The metal contacts (15) are all electrically connected to the processing unit (9). The polishing discs (12) are all electrically connected to the processing unit (9). When the polishing disc (12) contacts the metal contacts (15), a current loop is formed.

3. The ceramic ferrule concentricity adjustment device according to claim 2, characterized in that, A rubber head (16) is provided inside the adsorption hole (11). The rubber head (16) is fixedly installed at the end of the adsorption hole (11) and is flush with the surface of the grinding disc (12).

4. The ceramic ferrule concentricity adjustment device according to claim 3, characterized in that, The swing arm (7) has two sliding grooves (17) inside. The two sliding grooves (17) are symmetrically arranged about the groove (10) and are located below the two grinding discs (12). The sliding grooves (17) are perpendicular to the adsorption hole (11) and communicate with the adsorption hole (11). The surface of the swing arm (7) is also provided with two locking grooves (18) corresponding to the two grinding discs (12). The two locking grooves (18) are symmetrically arranged about the groove (10) and communicate with the two sliding grooves (17) respectively. Each grinding disc (12) has a hook (19) on the side away from the center of the groove (10). 12) When it is in contact with the surface of the swing arm (7), the hook part (19) extends into the corresponding locking groove (18). The sliding groove (17) is equipped with a slider (20). The sliding groove (17) is equipped with a spring (21). The spring (21) is used to push the slider (20) away from the adsorption hole (11). The end of the slider (20) away from the adsorption hole (11) is provided with a snap-fit ​​part (22). The snap-fit ​​part (22) is used to snap the hook part (19) when it extends into the locking groove (18). The top of the snap-fit ​​part (22) is provided with a downwardly inclined guide part (23).

5. The ceramic ferrule concentricity adjustment device according to claim 4, characterized in that, The top of the slider (20) facing the adsorption hole (11) is provided with an inclined first guide slope (24), and the bottom of the rubber head (16) is provided with two second guide slopes (25) corresponding to the two first guide slopes (24). When negative pressure is generated inside the adsorption hole (11), the slider (20) slides towards the adsorption hole (11) and causes the first guide slope (24) to squeeze the second guide slope (25).

6. The ceramic ferrule concentricity adjustment device according to claim 4, characterized in that, The slider (20) has a vent (26) at one end near the adsorption hole (11). The vent (26) passes through the slider (20), and the axial direction of the vent (26) is the same as the axial direction of the adsorption hole (11).

7. The ceramic ferrule concentricity adjustment device according to claim 2, characterized in that, When the grinding disc (12) is below the abnormal temperature, an arc-shaped guide portion (27) is formed at the end of the grinding disc (12) away from the adsorption hole (11), and the concave side of the arc-shaped portion (14) is opposite to the concave direction of the arc-shaped portion (14).

8. The ceramic ferrule concentricity adjustment device according to claim 1, characterized in that, The swing arm (7) swings along the vertical plane. When the swing arm (7) delivers the ceramic insert between the front ejector pin (2) and the rear ejector pin (3), the adsorption hole (11) is located above the ceramic insert and adsorbs the ceramic insert.

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