Full-automatic grinding equipment for outer diameter of bar

Abstract

The invention belongs to the technical field of grinding machine tools, and particularly relates to bar outer diameter full-automatic grinding equipment. The invention provides full-automatic grinding equipment for the outer diameter of a bar. Comprising a grinding table, a rotary clamping head, a positioning clamping module, a follow-up adjusting module and the like, the positioning clamping module used for clamping and fixing the PCB drill bit is arranged between the grinding table and the rotary clamping head, and the follow-up adjusting module used for self-adaptive supporting and limiting of the PCB drill bit is arranged on a grinding mechanism. The equipment is integrated with four functional modules, and full-process automatic machining of a PCB drill bit from clamping, rough grinding, accurate grinding to discharging can be achieved; during rough grinding, the micrometer head is linked with the follow-up bracket, so that the grinding wheel is always attached to the outer diameter of the drill bit in the grinding process, the radial stress deviation can be effectively reduced, the grinding precision is improved, and the service life of the grinding wheel is prolonged; meanwhile, the follow-up structure can track the size change of the drill bit in real time, and stability and consistency of the grinding process are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of grinding machine tools, in particular to a fully automatic grinding device for the outer diameter of a bar. Background Art

[0002] PCB drill bits are commonly used tools for drilling holes in PCB circuit boards. They are manufactured by grinding and cutting bar stock. With the continuous advancement of technology, PCB drill bits have evolved into a variety of sizes, each with significant variations in dimensions. During the PCB drill bit production process, the bar stock undergoes rough grinding and then fine grinding to achieve the desired outer diameter.

[0003] In the existing technology, coarse grinding and fine grinding are processed by different equipment respectively, and the integration is relatively low. In addition, the bar material needs to be dragged by a bracket during grinding to process the bar material. When replacing the bar material of different models and specifications for processing, the existing equipment needs to adjust the position of the bracket. Moreover, adjusting the bracket is relatively troublesome and requires repeated debugging to adjust it into place, which is not convenient to operate. Summary of the Invention

[0004] In order to overcome the imperfect integration of existing grinding devices and the room for further improvement in grinding efficiency, the technical problem to be solved is to provide a fully automatic grinding device for the outer diameter of bars.

[0005] The technical solution is: a fully automatic grinding equipment for the outer diameter of a bar, comprising a grinding table, a control module, a rotary clamping head and a grinding mechanism. A control module for driving the PCB drill bit to move and rotate in a directional manner is installed in the middle of the grinding table, and the rotary clamping head is connected to the control module. A grinding mechanism for grinding the PCB drill bit is arranged on the periphery of the grinding table, and also comprises a positioning clamping module and a follow-up adjustment module. A positioning clamping module for clamping and fixing the PCB drill bit is arranged between the grinding table and the rotary clamping head. A follow-up adjustment module for adaptive support and limiting of the PCB drill bit is arranged on the grinding mechanism. The follow-up adjustment module comprises a follow-up bracket, an adjustment arm, a positioning block and a differential head. The follow-up bracket is arranged on the grinding mechanism, the adjustment arm is hingedly connected to the follow-up bracket, and a tension spring is hung between the adjustment arm and the follow-up bracket. The differential head is installed on the upper part of the follow-up bracket, and the end of the movable rod of the differential head abuts against the upper end of the adjustment arm, and the lower end of the adjustment arm is provided with a positioning block abutting against the PCB drill bit.

[0006] In addition, it is particularly preferred that the positioning and clamping module includes a clamping arm, an elastic member, an electric push rod and a first electric clamping arm, the internal hinged connection of the rotating clamping head is provided with a clamping arm for clamping and abutting against the PCB drill bit, an elastic member is connected between the inner end of the clamping arm and the inner wall of the rotating clamping head, an electric push rod capable of pushing the clamping arm to swing open is provided in the loading area of ​​the grinding table, and a first electric clamping arm for fixedly clamping the PCB drill bit is also provided in the loading area of ​​the grinding table.

[0007] In addition, it is particularly preferred that the control module includes a fixed seat, a drive motor, a rotating seat, a lifter, a positioning clamping tooth and a guide sleeve. The fixed seat is arranged in the middle of the grinding table, the drive motor is installed at the bottom of the fixed seat, the rotating seat is rotatably arranged on the upper part of the fixed seat and is connected to the output shaft of the drive motor, the lifter is installed on the rotating seat, and the rotating clamping heads are distributed in an array at the end of the telescopic shaft of the lifter, the guide sleeve is movably sleeved on the rotating seat and wrapped around the outer periphery of the rotating clamping head, and a pair of positioning clamping teeth that can engage and separate with each other are arranged between the top of the rotating seat and the inner wall of the guide sleeve.

[0008] In addition, it is particularly preferred that the grinding mechanism includes a first electric slide, a coarse grinder, a second electric slide and a fine grinder, and the first electric slide and the second electric slide are distributed on the grinding table along the circumferential direction, wherein the first electric slide has two groups that are symmetrically distributed on the left and right, and the second electric slide has two groups that are distributed on the same side, the coarse grinder is installed on one side of the first electric slide, and the follower bracket is installed on the first electric slide of the coarse grinder, and there are two groups of fine grinders and they are respectively installed on the corresponding two groups of second electric slides.

[0009] In addition, it is particularly preferred that a positioning mechanism is further included which is distributed corresponding to the first electric slide and the second electric slide, and the positioning mechanism includes a connecting seat, a clamping claw and an electric push rod. The connecting seats are distributed on the grinding table at intervals along the circumferential direction, and the connecting seats correspond one-to-one to the first electric slide and the second electric slide. A clamping claw movably connected to the top of each connecting seat is provided for clamping the PCB drill bit, and an electric push rod for driving and controlling the moving position of the clamping claw is provided in the middle of each connecting seat.

[0010] In addition, it is particularly preferred that a detection module is also included, which includes a cylinder, a roundness meter, a mounting seat, a detection probe and a protective cover. The cylinder is installed on the first electric slide on the other side, and the mounting seat is arranged at the end of the telescopic shaft of the cylinder. The roundness meters are symmetrically distributed on the mounting seat and are used to detect the end of the PCB drill bit. The detection probe is arranged on the mounting seat and is located between the two roundness meters. The protective cover is wrapped around the outer periphery of the mounting seat.

[0011] In addition, it is particularly preferred that it further includes a base, a movable adjustment module and a second electric clamping arm. The base is provided on the front side of the grinding table, and the second electric clamping arm for clamping and fixing the PCB drill bit is provided on the base through the movable adjustment module.

[0012] In addition, it is particularly preferred that it also includes a tray, a discharge tray and a clamping piece. The tray is arranged in the middle of the base, the discharge tray is distributed on the tray, and is used to insert the PCB drill bit. The clamping piece is symmetrically distributed on the tray and is used to press and fix the discharge tray.

[0013] In addition, it is particularly preferred that the grinding table is integrated with a controller, and the drive motor, lifter, electric push rod, first electric clamping arm, electric push rod, first electric slide, rough grinder, second electric slide, fine grinder, cylinder, roundness meter, detection probe, movable adjustment module and second electric clamping arm are electrically connected to the controller respectively.

[0014] The beneficial effects are as follows: this equipment integrates four major functional modules, which can realize the full-process automated processing of PCB drill bits from clamping, rough grinding, fine grinding to discharge; and during rough grinding, the micrometer head is linked to the follow-up bracket to ensure that the grinding wheel always keeps in contact with the outer diameter of the drill bit during the grinding process, which can effectively reduce radial force deviation and improve grinding accuracy and grinding wheel service life; at the same time, the follow-up structure can track the changes in drill bit size in real time to ensure the stability and consistency of the grinding process; it is not only beneficial to improve the grinding efficiency of PCB drill bits, but also can significantly improve processing accuracy and equipment operation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 Schematic diagram of the three-dimensional structure of the control module of the present invention.

[0017] Figure 3 This is a structural separation diagram of the regulatory module of the present invention.

[0018] Figure 4 Schematic diagram of part of the structure of the control module of the present invention.

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the positioning and clamping module of the present invention.

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the locking mechanism of the present invention.

[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of the follow-up adjustment module and the rough grinder of the present invention.

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the follow-up adjustment module of the present invention.

[0023] Figure 9 It is a schematic diagram of the three-dimensional structure of the fine grinder of the present invention.

[0024] Figure 10 It is a schematic diagram of the three-dimensional structure of the detection module of the present invention.

[0025] Figure 11 It is a schematic diagram of the three-dimensional structure of the base, the movable adjustment module and the second electric clamping arm of the present invention.

[0026] Figure 12 It is a schematic diagram of the three-dimensional structure of the tray, the material discharging tray and the positioning member of the present invention.

[0027] Figure numbers: 1: Grinding table, 2: Fixed seat, 3: Driving motor, 4: Rotating seat, 5: Lifter, 6: Positioning gear, 7: Rotating clamping head, 70: Clamping arm, 71: Elastic part, 8: Guide sleeve, 9: Electric push rod, 10: First electric clamping arm, 11: Connecting seat, 12: Clamping claw, 13: Electric push rod, 14: First electric slide, 15: Rough grinder, 16: Follow-up bracket, 17: Adjusting arm, 18: Positioning block, 19: Differential head, 20: Second electric slide, 21: Fine grinder, 22: Cylinder, 23: Roundness meter, 24: Mounting seat, 25: Detection probe, 26: Protective cover, 27: Base, 28: Mobile adjustment module, 29: Second electric clamping arm, 30: Pallet, 31: Discharge tray, 32: Positioning part, a: PCB drill bit. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings.

[0029] First embodiment: Figures 1-9As shown, the present invention provides a fully automatic grinding equipment for the outer diameter of a bar, comprising a grinding table 1, a control module, a rotary clamping head 7 and a grinding mechanism. The control module is installed in the middle of the grinding table 1, which can be used to drive and control the PCB drill bit to perform regular intermittent directional movement and rotation; the rotary clamping head 7 is connected to the control module, and a grinding mechanism is provided on the outer periphery of the grinding table 1. The grinding mechanism is integrated with a rough grinding processing area and a fine grinding processing area, which can perform continuous rough grinding and fine grinding on the PCB drill bit a; it also includes a positioning clamping module and a follow-up adjustment module. A positioning clamping module is provided between the grinding table 1 and the rotary clamping head 7. The positioning clamping module can realize adaptive clamping and fixation of PCB drill bits a of different models and sizes through the positioning clamping module, which is convenient to use; the grinding mechanism is provided with a follow-up adjustment module, which can realize adaptive clamping and fixation of PCB drill bits a of different models and sizes through the follow-up adjustment module. The PCB drill bit a is adaptively supported and limited by the follow-up support, which is conducive to synchronously cooperating with the grinding mechanism to smoothly grind the PCB drill bit a, and is conducive to improving the quality of grinding; the follow-up adjustment module includes a follow-up bracket 16, an adjustment arm 17, a positioning block 18 and a differential head 19, the follow-up bracket 16 is arranged on the grinding mechanism, the adjustment arm 17 is hingedly connected to the follow-up bracket 16, and a tension spring is hung between the adjustment arm 17 and the follow-up bracket 16, and the tension spring is used to provide tension to the adjustment arm 17 so that the adjustment arm 17 and the positioning block 18 can adaptively abut against the outer diameter of the PCB drill bit a, which is conducive to reducing the influence of radial force during grinding; the differential head 19 is installed on the upper part of the follow-up bracket 16, and the end of the movable rod of the differential head 19 abuts against the upper end of the adjustment arm 17, and the lower end of the adjustment arm 17 is provided with a positioning block 18 abutting against the PCB drill bit a.

[0030] Further, such as Figure 2-Figure 5 As shown, the positioning and clamping module includes a clamping arm 70, an elastic member 71, an electric push rod 9 and a first electric clamping arm 10. The clamping arm 70 is hingedly connected to the inside of the rotating clamping head 7. The clamping arm 70 is used to adaptively clamp and limit PCB drill bits a of different models and sizes; an elastic member 71 is connected between the inner end of the clamping arm 70 and the inner wall of the rotating clamping head 7. The elastic member 71 is an elastic rubber pad or a compression spring or other elastic member, which is used to provide tensioning force to one end of the clamping arm 70 so that the other end of the clamping arm 70 can adaptively clamp and fix the PCB drill bit a; an electric push rod 9 that can push the clamping arm 70 to swing open is provided in the loading area of ​​the grinding table 1, and a first electric clamping arm 10 for fixing and clamping the PCB drill bit a is also provided in the loading area of ​​the grinding table 1, which is used to assist the PCB drill bit a in installation and disassembly during loading and unloading.

[0031] Further, such as Figures 1-4As shown, the control module includes a fixed base 2, a drive motor 3, a rotating base 4, a lifter 5, a positioning tooth 6 and a guide sleeve 8. The fixed base 2 is arranged in the middle of the grinding table 1, the drive motor 3 is installed at the bottom of the fixed base 2, the rotating base 4 is rotatably arranged on the upper part of the fixed base 2 and is connected to the output shaft of the drive motor 3, the lifter 5 is installed on the rotating base 4, and the rotating clamping head 7 is distributed in an array at the end of the telescopic shaft of the lifter 5. The lifter 5 is an electric cylinder used to drive the PCB drill bit a to move up or down; the guide sleeve 8 is movably sleeved on the rotating base 4 and wrapped around the outer periphery of the rotating clamping head 7. A pair of positioning teeth 6 that can engage and separate with each other are provided between the top of the rotating base 4 and the inner wall of the guide sleeve 8. Through the clamping cooperation of the two positioning teeth 6, the purpose of automatically locking the rotating PCB drill bit a can be achieved.

[0032] Further, such as Figure 1 、 Figure 7 and Figure 9 As shown, the grinding mechanism includes a first electric slide 14, a rough grinder 15, a second electric slide 20 and a fine grinder 21. The first electric slide 14 and the second electric slide 20 are distributed on the grinding table 1 at intervals along the circumferential direction, wherein the first electric slide 14 has two groups that are symmetrically distributed on the left and right, and the second electric slide 20 has two groups that are distributed on the same side. The rough grinder 15 is installed on one side of the first electric slide 14, and the follower bracket 16 is installed on the first electric slide 14 of the rough grinder 15. There are two groups of fine grinders 21 distributed and installed on two groups of second electric slides 20; the integrated arrangement of the rough grinder 15 and the fine grinder 21 is conducive to continuous grinding of the PCB drill bit a, thereby improving the grinding efficiency of the PCB drill bit a.

[0033] This equipment integrates four areas, namely the loading and unloading area, the rough and fine grinding area, the finished product inspection area and the material conversion area. When in use, just insert the PCB drill bit a into the rotating clamping head 7 in the material conversion area. Through the cooperation of the clamping arm 70 and the elastic member 71, the PCB drill bits a of different models and sizes can be adaptively clamped and fixed; then, by controlling the lifter 5 in the material conversion area to rise and controlling the drive motor 3 to rotate 90 degrees, the PCB drill bit a is brought into the rough grinding area. At this time, the drive motor 3 stops and controls the lifter 5 to retract and reset. Through the mutual clamping cooperation of the two positioning teeth 6, the lifter 5 and the PCB drill bit a clamped thereon can be locked and limited; then the first electric slide 14 is controlled to drive the rough grinding on it Grinding mill 15 is positioned near PCB drill bit a. Through a pre-adjusted differential head 19, the adjustment arm 17 and positioning block 18 are adaptively aligned with the outer diameter of PCB drill bit a, thereby reducing the radial force exerted by the grinding wheel on the PCB drill bit a material during grinding. Controlling the rough grinder 15 allows for preliminary grinding of the outer diameter of PCB drill bit a. As the rough grinder 15 drives the grinding wheel on the PCB drill bit a material, it also drives the differential head 19 to move synchronously. The differential head 19 presses against the follower bracket 16, and the outer diameter of the PCB drill bit a material decreases as the grinding wheel grinds, causing the follower bracket 16 to move synchronously. During the grinding process, the follower bracket 16 maintains contact with the PCB drill bit a material, extending the lifespan and stability of the grinding wheel, thereby improving the grinding accuracy of the PCB drill bit a material. Similarly, by repeating the above operations, the PCB drill bit a that has been initially ground can be controlled to continue rotating 90 degrees to the fine grinding processing area, and then the two sets of fine grinders 21 can be controlled to perform fine grinding on the initially ground PCB drill bit a again. The grinding wheels on the two sets of fine grinders 21 simultaneously process the PCB drill bit a material, which is beneficial to improving the accuracy during grinding and also beneficial to increasing the service life of the grinding wheel; at the same time, intermittent material loading can be continued in the feeding area, thereby achieving continuous grinding, which is beneficial to improving the grinding efficiency of the PCB drill bit a.

[0034] Second embodiment: Based on the first embodiment, Figure 2 、 Figure 6 and Figure 9As shown, it also includes a locking mechanism distributed corresponding to the first electric slide 14 and the second electric slide 20, and the locking mechanism includes a connecting seat 11, a clamping jaw 12 and an electric push rod 13. The connecting seats 11 are distributed on the grinding table 1 at intervals along the circumferential direction, and the connecting seats 11 correspond one to one with the first electric slide 14 and the second electric slide 20. The top of each connecting seat 11 is provided with a clamping jaw 12 movably connected to clamp the PCB drill bit a, and the middle of each connecting seat 11 is provided with an electric push rod 13 for driving and controlling the moving position of the clamping jaw 12; by controlling the extension or shortening of the electric push rod 13 to drive the movement of the clamping jaw 12, different types of PCB drill bits a are clamped and fixed, which is beneficial to improving the stability of the PCB drill bit a during grinding.

[0035] Further, such as Figure 1 and Figure 10 As shown, a detection module is also included, which includes a cylinder 22, a roundness meter 23, a mounting seat 24, a detection probe 25 and a protective cover 26. The cylinder 22 is installed on the first electric slide 14 on the other side, and the mounting seat 24 is arranged at the end of the telescopic shaft of the cylinder 22. The roundness meters 23 are symmetrically distributed on the mounting seat 24. The detection probe 25 is arranged on the mounting seat 24 and is located between the two roundness meters 23. Through the cooperation of the two roundness meters 23 and the detection probe 25, multi-directional detection of the end of the PCB drill bit a is achieved, which is conducive to accurately controlling the grinding quality of the PCB drill bit a; the protective cover 26 is wrapped around the outer periphery of the mounting seat 24.

[0036] Further, such as Figure 1 、 Figure 11 and Figure 12 As shown, it also includes a base 27, a movable adjustment module and a second electric clamping arm 29. The base 27 is provided on the front side of the grinding table 1. The second electric clamping arm 29 for clamping and fixing the PCB drill bit a is provided on the base 27 through the movable adjustment module 28; it also includes a tray 30, a discharge tray 31 and a clamping piece 32. The tray 30 is provided in the middle of the base 27, the discharge tray 31 is distributed on the tray 30, and is used to insert and place the PCB drill bit a, and the clamping piece 32 is symmetrically distributed on the tray 30, and is used to press and fix the discharge tray 31; the auxiliary cooperation of the movable adjustment module and the second electric clamping arm 29 is conducive to further improving the convenience of loading and unloading the PCB drill bit a, thereby facilitating the insertion and placement of the PCB drill bit a on the corresponding discharge tray 31.

[0037] In addition, if Figures 1-11As shown, the grinding table 1 is integrated with a controller, and the drive motor 3, lifter 5, electric push rod 9, first electric clamping arm 10, electric push rod 13, first electric slide 14, rough grinder 15, second electric slide 20, fine grinder 21, cylinder 22, roundness meter 23, detection probe 25, movable adjustment module 28 and second electric clamping arm 29 are electrically connected to the controller respectively, which is conducive to further improving the overall automation level of the equipment.

[0038] After the fine grinding of the PCB drill bit a is completed, the PCB drill bit a is controlled to rotate 90 degrees again to the finished product detection area. A detection mechanism is set on the slide on the first electric slide 14 in the finished product detection area. During the detection, the slide on the first electric slide 14 is controlled to drive the detection mechanism to move to the set position, and the roundness meter 23 and the detection probe 25 of the detection mechanism are used to perform a full-scale detection of the PCB drill bit a material. The outer diameter value, concentricity, cylindricity and inclination of the material after grinding can be detected. When the detected data does not match the set value, the system will calculate the difference with the set value and correct it within the fine grinding area. This is conducive to reducing frequent manual measurement of materials, thereby helping to improve the yield rate of PCB drill bit a material grinding. When defective products are detected in the finished product inspection area, the upper and lower limits can also be distinguished. When unloading in the loading and unloading area, the finished product materials, defective upper limit materials, and unmeasured lower limit materials are respectively inserted into the corresponding discharge trays 31, thereby facilitating the rework of defective products, and eliminating the need to repeatedly screen the PCB drill bit a material.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fully automatic grinding device for the outer diameter of a bar material, comprising a grinding table (1), a control module, a rotary clamping head (7) and a grinding mechanism, wherein the grinding table (1) is provided with a control module for driving a PCB drill bit (a) to move and rotate in a directional manner, the rotary clamping head (7) is connected to the control module, and the grinding table (1) is provided with a grinding mechanism for grinding the PCB drill bit (a) on the periphery thereof, characterized in that: The invention also includes a positioning clamping module and a follow-up adjustment module. A positioning clamping module for clamping and fixing the PCB drill bit (a) is provided between the grinding table (1) and the rotating clamping head (7). A follow-up adjustment module for adaptively supporting and limiting the PCB drill bit (a) is provided on the grinding mechanism. The follow-up adjustment module includes a follow-up bracket (16), an adjustment arm (17), a positioning block (18) and a differential head (19). The follow-up bracket (16) is provided on the grinding mechanism. The adjustment arm (17) is hingedly connected to the follow-up bracket (16). A tension spring is hung between the adjustment arm (17) and the follow-up bracket (16). The differential head (19) is installed on the upper part of the follow-up bracket (16). The end of the movable rod of the differential head (19) is in contact with the upper end of the adjustment arm (17). The lower end of the adjustment arm (17) is provided with a positioning block (18) in contact with the PCB drill bit (a).

2. The fully automatic bar outer diameter grinding equipment according to claim 1, characterized in that: The positioning clamping module comprises a clamping arm (70), an elastic member (71), an electric push rod (9) and a first electric clamping arm (10); the clamping arm (70) for clamping and abutting against a PCB drill bit (a) is hingedly connected inside the rotating clamping head (7); an elastic member (71) is connected between the inner end of the clamping arm (70) and the inner wall of the rotating clamping head (7); an electric push rod (9) capable of pushing the clamping arm (70) to swing open is provided in the loading area of ​​the grinding table (1); and a first electric clamping arm (10) for fixing and clamping the PCB drill bit (a) is also provided in the loading area of ​​the grinding table (1).

3. The fully automatic bar outer diameter grinding equipment according to claim 1, characterized in that: The control module comprises a fixed seat (2), a driving motor (3), a rotating seat (4), a lifter (5), a positioning clamping tooth (6) and a guide sleeve (8); the fixed seat (2) is arranged in the middle of the grinding table (1); the driving motor (3) is installed at the bottom of the fixed seat (2); the rotating seat (4) is rotatably arranged on the upper part of the fixed seat (2) and is connected to the output shaft of the driving motor (3); the lifter (5) is installed on the rotating seat (4), and the rotating clamping head (7) is distributed in an array at the end of the telescopic shaft of the lifter (5); the guide sleeve (8) is movably sleeved on the rotating seat (4) and wrapped around the outer periphery of the rotating clamping head (7); a pair of positioning clamping teeth (6) that can be engaged and separated with each other are arranged between the top of the rotating seat (4) and the inner wall of the guide sleeve (8).

4. The fully automatic bar outer diameter grinding equipment according to claim 1, characterized in that: The grinding mechanism comprises a first electric slide (14), a coarse grinder (15), a second electric slide (20) and a fine grinder (21). The first electric slide (14) and the second electric slide (20) are distributed on the grinding table (1) at intervals along the circumferential direction, wherein the first electric slide (14) has two groups that are symmetrically distributed on the left and right, and the second electric slide (20) has two groups that are distributed on the same side. The coarse grinder (15) is installed on one side of the first electric slide (14), and the follower bracket (16) is installed on the first electric slide (14) of the coarse grinder (15). There are two groups of fine grinders (21) and they are respectively installed on the corresponding two groups of second electric slides (20).

5. The fully automatic bar outer diameter grinding equipment according to claim 4, characterized in that: The invention also includes a positioning mechanism distributed corresponding to the first electric slide (14) and the second electric slide (20), the positioning mechanism including a connecting seat (11), a clamping claw (12) and an electric push rod (13), the connecting seat (11) is distributed on the grinding table (1) at intervals along the circumference, and the connecting seat (11) corresponds to the first electric slide (14) and the second electric slide (20) one by one, the top of each connecting seat (11) is provided with a clamping claw (12) movably connected to clamp the PCB drill bit (a), and the middle of each connecting seat (11) is provided with an electric push rod (13) for driving and controlling the moving position of the clamping claw (12).

6. The fully automatic bar outer diameter grinding equipment according to claim 4, characterized in that: The invention also includes a detection module, which includes a cylinder (22), a roundness meter (23), a mounting seat (24), a detection probe (25) and a protective cover (26). The cylinder (22) is mounted on the first electric slide (14) on the other side. The mounting seat (24) is arranged at the end of the telescopic shaft of the cylinder (22). The roundness meter (23) is symmetrically distributed on the mounting seat (24) and is used to detect the end of the PCB drill bit (a). The detection probe (25) is arranged on the mounting seat (24) and is located between the two roundness meters (23). The protective cover (26) is arranged in a wrapped manner around the outer periphery of the mounting seat (24).

7. The fully automatic bar outer diameter grinding equipment according to claim 1, characterized in that: The grinding table (1) further comprises a base (27), a movable adjustment module (28) and a second electric clamping arm (29). The base (27) is provided on the front side of the grinding table (1). The second electric clamping arm (29) for clamping and fixing the PCB drill bit (a) is provided on the base (27) through the movable adjustment module (28).

8. The fully automatic bar outer diameter grinding equipment according to claim 7, characterized in that: The utility model also includes a tray (30), a material discharge tray (31) and a clamping member (32), wherein the tray (30) is arranged in the middle of the base (27), the material discharge tray (31) is distributed on the tray (30) and is used for inserting and placing the PCB drill bit (a), and the clamping member (32) is symmetrically distributed on the tray (30) and is used for pressing and fixing the material discharge tray (31).

9. The fully automatic bar outer diameter grinding equipment according to any one of claims 1 to 8, characterized in that: The grinding table (1) is integrated with a controller, and the driving motor (3), the lifter (5), the electric push rod (9), the first electric clamping arm (10), the electric push rod (13), the first electric slide (14), the rough grinder (15), the second electric slide (20), the fine grinder (21), the cylinder (22), the roundness meter (23), the detection probe (25), the movement adjustment module (28) and the second electric clamping arm (29) are respectively electrically connected to the controller.

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