A broken needle detection device for PCB processing equipment

Abstract

The present invention discloses a broken needle detection device for PCB processing equipment, which relates to the technical field of PCB processing equipment, and comprises a main body, wherein the main body is connected to the main body of the processing equipment, the upper surface of the main body is fixedly connected to a servo motor through a bracket, the output shaft of the servo motor is fixedly connected to a spindle, the spindle and the main body are connected to each other through a bearing, and the spindle is fixedly connected to a connecting block at one end away from the servo motor, and a detection mechanism is arranged at the main body, wherein the detection mechanism comprises a functional cavity, the functional cavity is arranged in the main body, and a section of the spindle located in the functional cavity is fixedly connected to a plurality of second conductive rods. The advantages are: the present invention can avoid the occurrence of broken needles to a certain extent, and even if the broken needle occurs, the processing can be continued, and the broken needle can be detected before processing, and if the broken needle occurs, the processing personnel can be reminded in time to make corresponding treatment, and the drill needle can be cleaned before drilling.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB processing equipment, and in particular to a broken needle detection device for PCB processing equipment. Background Art

[0002] With the continuous development of science and technology, more and more electronic products appear in our lives, and the intelligence of electronic products is also constantly improving. For the composition of electronic products, circuit boards are an important component. Circuit boards are also called PCB boards. Electronic equipment shows a trend of high performance, high speed, and light weight. PCB boards, as a multidisciplinary industry, have become one of the most critical technologies for electronic equipment. Circuit boards integrate the circuits of electronic products with electronic components, thereby integrating the circuits of electronic products to complete complex control and power transmission. In the processing of PCB boards, in order to facilitate the installation of electronic components, it is usually necessary to open holes in the PCB board, and the holes are opened through processing equipment.

[0003] In the prior art, needle breakage is one of the common phenomena during the processing of existing processing equipment. Needle breakage can cause product abnormalities or even damage the equipment. The detection of broken needles is usually carried out through manual observation, which makes it impossible to find abnormalities in time, resulting in the production of defective products. There are no measures to avoid the occurrence of broken needles to avoid the occurrence of broken needles from the source. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a broken needle detection device for PCB processing equipment.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A broken needle detection device for PCB processing equipment includes a main body, which is connected to the main body of the processing equipment. A servo motor is fixedly connected to the upper surface of the main body through a bracket. The output shaft of the servo motor is fixedly connected to a main shaft. The main shaft and the main body are rotatably connected through a bearing. The main shaft is fixedly connected to a connecting block at one end away from the servo motor. A detection mechanism is arranged on the main body.

[0007] Furthermore, the detection mechanism includes a functional cavity, which is opened in the main body, a section of the main shaft located in the functional cavity is penetrated and fixedly connected with a plurality of second conductive rods, an electromagnet is arranged in the connecting block, a first conductive rod is penetrated and fixedly connected with the main shaft, the first conductive rod is penetrated and fixedly connected with the connecting block, an end of the second conductive rod located in the functional cavity is fixedly connected with a third conductive rod, a plurality of permanent magnets are fixedly connected to the inner side wall of the functional cavity, and the first conductive rod is electrically connected to the electromagnet through a wire.

[0008] Furthermore, the detection mechanism also includes two sliding grooves, which are opened in the main body, and the main body is sealed and slidably connected with two sliders through the sliding grooves. The two sliders are commonly fixedly connected with a lifting block, and the lifting block is a hollow structure. The lifting block is provided with a through hole, and the lifting block is fixedly connected with a detection ring. The inner side wall of the detection ring is fixedly connected with an infrared transmitter and an infrared receiver, and the upper surface of the main body is fixedly connected with an alarm, and the infrared receiver is connected to the alarm through a PLC circuit.

[0009] Furthermore, the detection mechanism also includes an annular cavity, which is opened in the main body, and a piston is sealingly and slidingly connected in the annular cavity. A plurality of first springs are fixedly connected between the piston and the bottom wall of the annular cavity. A first tube is fixedly connected through the main body, and the first tube connects the corresponding sliding groove with the annular cavity. Hydraulic oil is filled between the top wall of the annular cavity and the piston.

[0010] Furthermore, a plurality of limit rods are fixedly connected between the inner top wall and the inner bottom wall of the annular cavity, and the limit rods are slidably connected to the piston.

[0011] Furthermore, the detection ring is provided with a plurality of absorption holes, and a plurality of bristles are fixedly connected to the inner side wall of the detection ring.

[0012] Furthermore, a cleaning mechanism is provided in the main body, and the cleaning mechanism includes a cavity, which is opened in the main body, and two pump plates are sealingly and slidably connected in the cavity, and a plurality of second springs are fixedly connected between the pump plates and the inner wall of the cavity. A section of the main shaft located in the cavity is penetrated and fixedly connected with a cam, and two second tubes are penetrated and fixedly connected to the main body, one end of the second tube extends into the cavity, and the other end extends to the outside of the main body, and two third tubes are penetrated and fixedly connected to the lifting block, one end of the third tube extends into the lifting block, and the other end extends into the corresponding second tube, and the third tube is sealed and slidably connected to the corresponding second tube, and the main body is provided with two processing holes, which connect the cavity with the outside, and the main body is rotatably connected to two blocking plates by hinges, and the blocking plate is penetrated and fixedly connected with a fourth tube, and a filter is provided in the fourth tube.

[0013] Furthermore, one-way valves are provided in the second tube and the fourth tube.

[0014] The present invention has the following advantages:

[0015] 1. During the drilling process, the servo motor drives the connection block to rotate, thereby driving the drill bit to rotate through the connection block. While the main shaft rotates, it also drives the third conductive rod to rotate, thereby cutting the magnetic flux lines of the permanent magnet, generating an induced current, which is supplied to the electromagnet, so that the electromagnet generates magnetic force, and generates a certain magnetic attraction force on the drill bit. Through this magnetic attraction force, the stress that may cause the drill bit to break is counteracted, thereby avoiding the occurrence of broken needles, thus avoiding the occurrence of broken needles from the source;

[0016] 2. If the needle breaks, the magnetic force of the electromagnet will prevent the broken part from remaining on the PCB board, but will continue to drill holes by relying on the magnetic force, thus avoiding the production of defective products caused by broken drill bits;

[0017] 3. Since the magnetic force of the electromagnet is related to the rotation speed of the spindle, and the rotation speed of the spindle determines the rotation speed of the drill needle during drilling, that is, when the drill needle rotates faster, the magnetic attraction it receives is greater, and vice versa. Therefore, appropriate magnetic force is applied according to the rotation speed to avoid needle breakage, making the device more automated;

[0018] 4. The infrared transmitter on the inner wall of the detection ring emits infrared rays. If the drill needle is not broken, it will block the infrared rays, resulting in the infrared receiver not being able to receive the infrared rays. If the needle is broken, the infrared rays will reach the infrared receiver, and the alarm will be powered on to alarm, thereby automatically detecting the broken needle phenomenon, ensuring that the broken needle is discovered and handled in time to avoid the production of defective products;

[0019] 5. When the drill needle starts to rotate, the electromagnet is energized synchronously, which will also cause the piston to slide down, thereby causing the lifting block to move upward. On the one hand, this will prevent the lifting block from affecting the drilling. At the same time, the lifting block moves upward, cooperating with the bristles on the inner wall of the detection ring to clean the groove of the drill needle to prevent impurities in the drill needle from affecting the drilling.

[0020] 6. When the main shaft rotates, it will also drive the cam to rotate, and cooperate with the second spring to make the pump plate reciprocate. After the bristles clean out the impurities in the drill bit groove, the cleaned impurities are absorbed and collected uniformly through the absorption holes, which is more convenient for subsequent impurity treatment;

[0021] 7. After the impurities are cleaned and collected, the pump plate still maintains suction during the drilling process, so that the absorption hole is always suctioning, thereby accelerating the air flow at the drill needle, cooling the drill needle to a certain extent, avoiding the drill needle temperature from being too high, and further protecting the drill needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a broken needle detection device for PCB processing equipment proposed by the present invention;

[0023] Figure 2A schematic diagram of the internal structure of a broken needle detection device for PCB processing equipment proposed by the present invention;

[0024] Figure 3 for Figure 2 A in the enlarged view;

[0025] Figure 4 for Figure 2 The enlarged view of point B in the figure;

[0026] Figure 5 A schematic diagram of the internal structure of a functional slot in a broken needle detection device for PCB processing equipment proposed by the present invention;

[0027] Figure 6 A schematic diagram of the internal structure of a cavity in a broken needle detection device for PCB processing equipment proposed by the present invention;

[0028] Figure 7 The present invention is a schematic structural diagram of a detection ring in a broken needle detection device for PCB processing equipment.

[0029] In the figure: 1. main body; 2. servo motor; 3. main shaft; 4. connecting block; 5. electromagnet; 6. functional cavity; 7. first conductive rod; 8. second conductive rod; 9. third conductive rod; 10. permanent magnet; 11. sliding groove; 12. slider; 13. lifting block; 14. through hole; 15. detection ring; 16. infrared transmitter; 17. infrared receiver; 18. annular cavity; 19. limit rod; 20. piston; 21. first spring; 22. first tube; 23. cavity; 24. pump plate; 25. second spring; 26. cam; 27. second tube; 28. third tube; 29. ​​processing hole; 30. blocking plate; 31. fourth tube; 32. filter; 33. absorption hole; 34. bristles; 35. alarm. DETAILED DESCRIPTION

[0030] Reference Figure 1-7 A broken needle detection device for PCB processing equipment includes a main body 1, which is connected to the processing equipment. The processing equipment can freely control the position of the main body 1 to move it horizontally and vertically to complete drilling. A servo motor 2 is fixedly connected to the upper surface of the main body 1 through a bracket. The output shaft of the servo motor 2 is fixedly connected to a spindle 3. The spindle 3 and the main body 1 are rotatably connected through a bearing. The end of the spindle 3 away from the servo motor 2 is fixedly connected to a connecting block 4. A three-claw fixing mechanism for fixing the drill needle is arranged in the connecting block 4. It is a prior art and will not be described in detail here. A detection mechanism is arranged at the main body 1.

[0031] The detection mechanism includes a functional cavity 6, which is opened in the main body 1, a section of the main shaft 3 located in the functional cavity 6 is penetrated and fixedly connected with a plurality of second conductive rods 8, an electromagnet 5 is arranged in the connecting block 4, a first conductive rod 7 is penetrated and fixedly connected with the main shaft 3, the first conductive rod 7 is penetrated and fixedly connected with the connecting block 4, one end of the second conductive rod 8 located in the functional cavity 6 is fixedly connected with a third conductive rod 9, and a plurality of permanent magnets 10 are fixedly connected to the inner wall of the functional cavity 6, and the arrangement of the permanent magnet 10 is as follows Figure 5 As shown, the magnetic flux lines of the permanent magnet 10 are directed from the permanent magnet 10 to the axis of the main shaft 3, so that the third conductive rod 9 cuts the magnetic flux lines of the permanent magnet 10 during the rotation process, thereby generating an induced current. The first conductive rod 7 is electrically connected to the electromagnet 5 through a wire. When the main shaft 3 rotates, the third conductive rod 9 is also driven to rotate through the second conductive rod 8. The third conductive rod 9 rotates to cut the magnetic flux lines of the permanent magnet 10, thereby generating an induced current. The induced current is supplied to the electromagnet 5, so that the electromagnet 5 generates a magnetic force. The electromagnet 5 can generate a magnetic attraction on the drill bit. The magnetic attraction is applied to the drill bit. The magnetic attraction force is used to counteract the stress that may cause the drill needle to break, thereby avoiding the occurrence of drill needle breakage, and avoiding the occurrence of drill needle breakage from the source. If the drill needle breaks, the magnetic attraction force of the electromagnet 5 on the drill needle can prevent the broken part of the drill needle from falling off, but continue to maintain a complete drill needle state until the drilling is completed and the drill needle stops rotating. The magnetic attraction force will disappear and the broken part of the drill needle will fall off, thereby ensuring that drilling can continue after the drill needle breaks, avoiding stopping to replace the drill needle and affecting the processing efficiency, and at the same time avoiding the broken drill needle from continuing to be processed to produce defective products.

[0032] It is worth mentioning that, from E=BLV, it can be seen that the magnetic force of the electromagnet 5 is determined by the rotation speed of the third conductive rod 9, and the rotation speed of the third conductive rod 9 is determined by the rotation speed of the main shaft 3. The rotation speed of the main shaft 3 is the rotation speed of the drill when drilling. That is, the faster the drill rotates, the greater the induced current generated, and the greater the magnetic force of the electromagnet 5; otherwise, the smaller it is; that is, the magnetic attraction of the electromagnet 5 on the drill is related to the rotation speed of the drill when drilling, so that the appropriate magnetic force is applied according to the rotation speed to avoid the drill from breaking, so that the degree of automation of the device is higher.

[0033] The detection mechanism also includes two sliding grooves 11, which are opened in the main body 1. The main body 1 is sealed and slidably connected with two sliders 12 through the sliding grooves 11. The two sliders 12 are commonly fixedly connected with a lifting block 13. The lifting block 13 is a hollow structure. The lifting block 13 is opened with a through hole 14. The lifting block 13 is fixedly connected with a detection ring 15. The inner wall of the detection ring 15 is fixedly connected with an infrared transmitter 16 and an infrared receiver 17. The upper surface of the main body 1 is fixedly connected with an alarm 35. The infrared receiver 17 is connected to the alarm 35 through a PLC circuit. The PLC control circuit can enable the alarm 35 to be powered on and alarm when the infrared receiver 17 receives infrared rays.

[0034] It is worth mentioning that the detection mechanism can not only detect broken needles, but also make the alarm 35 sound when the drill bit is forgotten to be installed, thereby reminding the staff that the drill bit has not been installed, thereby avoiding negligence in work affecting the processing process.

[0035] The detection mechanism also includes an annular cavity 18, which is opened in the main body 1. A piston 20 is sealed and slidably connected in the annular cavity 18. A plurality of first springs 21 are fixedly connected between the piston 20 and the inner bottom wall of the annular cavity 18. A first tube 22 is fixedly connected through the main body 1. The first tube 22 connects the corresponding sliding groove 11 with the annular cavity 18. Hydraulic oil is filled between the inner top wall of the annular cavity 18 and the piston 20. A hole (not shown in the figure) is opened in the bottom wall of the main body 1 to connect the part below the piston 20 with the outside world, thereby ensuring that the sealed and slidably connected piston 20 can slide freely in the annular cavity 18. While the electromagnet 5 generates magnetic force to absorb the drill bit, it also generates magnetic attraction to the piston 20, thereby causing the piston 20 to slide down. The piston 20 can slide down through the first tube 22 The hydraulic oil in the sliding groove 11 is pumped into the annular cavity 18, so that the slider 12 slides up, and the sliding of the slider 12 can drive the lifting block 13 to rise. During the rising process, the infrared transmitter 16 emits infrared rays. If the drill needle is in a complete state, the infrared rays can be blocked, and the infrared rays cannot reach the infrared receiver 17. If there is a broken needle phenomenon, the infrared rays will not be blocked, but directly reach the infrared receiver 17. After the infrared receiver 17 receives the infrared rays, the alarm 35 can sound an alarm to remind the processing personnel that there is an abnormality in the drill needle and it needs to be dealt with in time, so that the drill needle can be detected before processing, and the broken needle phenomenon can be discovered in time to avoid affecting the processing process. After the lifting block 13 rises, it can also avoid the lifting block 13 from affecting the drilling of the drill needle.

[0036] It should be noted that the piston 20 is made of ferromagnetic metal, and the remaining metal parts of the device are all made of aluminum alloy, which is not only light in weight and high in strength, but also will not affect the magnetism of the electromagnet 5.

[0037] A plurality of limit rods 19 are fixedly connected between the inner top wall and the inner bottom wall of the annular cavity 18. The limit rods 19 are slidably connected with the piston 20. Through the setting of the limit rods 19, the piston 20 can only move in the vertical direction and cannot rotate, thereby preventing the electromagnet 5 from driving it to rotate together.

[0038] The detection ring 15 is provided with a plurality of absorption holes 33, and a plurality of bristles 34 are fixedly connected to the inner wall of the detection ring 15. By setting the bristles 34, when the drill bit rotates, the impurities in the drill bit groove can be cleaned by the bristles 34 to avoid the impurities affecting the drilling.

[0039] The main body 1 is provided with a cleaning mechanism, which includes a cavity 23, the cavity 23 is opened in the main body 1, and two pump plates 24 are sealed and slidably connected in the cavity 23. The main body 1 is provided with a hole (not shown in the figure) so that the part between the two pump plates 24 is connected to the outside, thereby ensuring that the two pump plates 24 in the sealed and slidable connection can slide freely. A plurality of second springs 25 are fixedly connected between the pump plates 24 and the inner side wall of the cavity 23. A section of the main shaft 3 located in the cavity 23 is penetrated and fixedly connected with a cam 26. The main body 1 is penetrated and fixedly connected with two The second tube 27 has one end extending through the cavity 23 and the other end extending through the outside of the main body 1. The lifting block 13 is fixedly connected with two third tubes 28. One end of the third tube 28 extends through the lifting block 13 and the other end extends through the corresponding second tube 27. The third tube 28 is sealed and slidably connected with the corresponding second tube 27. The main body 1 is provided with two processing holes 29, which connect the cavity 23 with the outside. The main body 1 is rotatably connected with two blocking plates 30 through hinges. The side of the blocking plate 30 is provided with a sealing The sealing plate 30 is connected with the fourth tube 31 through which the fourth tube 31 is fixedly connected. The filter screen 32 is arranged inside the fourth tube 31. The filter screen 32 blocks impurities and ensures that the air can be discharged smoothly. When the lifting block 13 is in the rising process, the drill needle is in a rotating state. The bristles 34 on the inner wall of the detection ring 15 can clean the impurities in the drill needle groove. At the same time, the rotation of the main shaft 3 will also drive the cam 26 to rotate. The rotation of the cam 26 cooperates with the second spring 25 to make the pump plate 24 reciprocates. During the reciprocating motion of the pump plate 24, when it moves toward the direction of the main shaft 3, the impurities cleaned by the bristles 34 can be absorbed into the cavity 23 through the second tube 27, the third tube 28 and the absorption hole 33. Then, when the pump plate 24 moves away from the main shaft 3, the air mixed with impurities can be pumped into the fourth tube 31. The impurities are blocked by the filter screen 32, and the air is discharged to the outside through the filter screen 32, thereby retaining the impurities in the cavity 23. The sealing plate 30 is opened regularly to clean the impurities in the cavity 23.

[0040] It is worth mentioning that when drilling, after the lifting block 13 is raised, the main shaft 3 is still rotating, so that the cam 26 continues to rotate, and the pump plate 24 keeps reciprocating motion, so that the absorption hole 33 of the detection ring 15 always keeps air suction, thereby accelerating the air flow near the drill needle, achieving a certain heat dissipation effect, avoiding the drill needle from overheating, and protecting the drill needle to a certain extent.

[0041] Both the second tube 27 and the fourth tube 31 are provided with a one-way valve. The one-way valve in the second tube 27 only allows fluid to enter the second tube 27 from the third tube 28, and the one-way valve in the fourth tube 31 only allows fluid to be discharged from the cavity 23 to the outside.

[0042] In the present invention, the drill bit is fixed by a three-claw fixing mechanism in the connecting block 4. After the fixing is completed, drilling can be started. The servo motor 2 is turned on to rotate the main shaft 3. The rotation of the main shaft 3 can drive the connecting block 4 to rotate, thereby causing the drill bit to rotate. At this time, the movement of the main body 1 can be controlled by the processing equipment to perform drilling.

[0043] When the main shaft 3 rotates, the third conductive rod 9 is also driven to rotate through the second conductive rod 8. The third conductive rod 9 rotates to cut the magnetic flux lines of the permanent magnet 10, thereby generating an induced current. The induced current is supplied to the electromagnet 5, so that the electromagnet 5 generates a magnetic force. The electromagnet 5 can generate a magnetic attraction on the drill bit. The magnetic attraction is applied to the drill bit, and the stress that may cause the drill bit to break is counteracted through the magnetic attraction, thereby avoiding the occurrence of broken needles.

[0044] If the drill needle breaks, the magnetic attraction of the electromagnet 5 on the drill needle will prevent the broken part of the drill needle from falling off, but will keep it in a complete state until the drilling is completed and the drill needle stops rotating. The magnetic attraction will disappear and the broken part of the drill needle will fall off, thereby ensuring that drilling can continue after the drill needle breaks, avoiding stopping to replace the drill needle and affecting the processing efficiency, and preventing the broken drill needle from continuing to be processed to produce defective products.

[0045] When the electromagnet 5 generates magnetic force to attract the drill bit, it also generates magnetic attraction force on the piston 20, so that the piston 20 slides down. When the piston 20 slides down, the hydraulic oil in the sliding groove 11 can be pumped into the annular cavity 18 through the first tube 22, so that the slider 12 slides up. The sliding of the slider 12 can drive the lifting block 13 to rise. During the rising process, the infrared transmitter 16 emits infrared rays. If the drill bit is in a complete state, the infrared rays can be blocked and the infrared rays cannot reach the infrared receiver 17. If there is a broken needle phenomenon, the infrared rays will not be blocked, but directly reach the infrared receiver 17. After the infrared receiver 17 receives the infrared rays, the alarm 35 can sound an alarm to remind the processing personnel that the drill bit is abnormal and needs to be dealt with in time. Therefore, the drill bit can be detected before processing, and the broken needle phenomenon can be discovered in time to avoid affecting the processing process.

[0046] When the lifting block 13 is in the ascending process, the drill needle is in a rotating state, and the bristles 34 on the inner wall of the detection ring 15 can clean the impurities in the drill needle groove. At the same time, the rotation of the main shaft 3 will also drive the cam 26 to rotate. The rotation of the cam 26 cooperates with the second spring 25 to make the pump plate 24 reciprocate. During the reciprocating motion of the pump plate 24, when it moves toward the main shaft 3, the impurities cleaned by the bristles 34 can be absorbed into the cavity 23 through the second tube 27, the third tube 28 and the absorption hole 33. Then, when the pump plate 24 moves away from the main shaft 3, the air mixed with impurities can be pumped into the fourth tube 31. The impurities are blocked by the filter screen 32, and the air is discharged to the outside through the filter screen 32, thereby retaining the impurities in the cavity 23. The sealing plate 30 is opened regularly to clean the impurities in the cavity 23.

Claims

1. A broken needle detection device for PCB processing equipment, comprising a main body (1), wherein the main body (1) is connected to a main body of the processing equipment, and is characterized in that: The upper surface of the main body (1) is fixedly connected to a servo motor (2) via a bracket, the output shaft of the servo motor (2) is fixedly connected to a main shaft (3), the main shaft (3) and the main body (1) are rotatably connected via a bearing, the end of the main shaft (3) away from the servo motor (2) is fixedly connected to a connecting block (4), a three-claw fixing mechanism for fixing a drill needle is arranged in the connecting block (4), a detection mechanism is arranged at the main body (1), the detection mechanism comprises a functional cavity (6), the functional cavity (6) is arranged in the main body (1), a section of the main shaft (3) located in the functional cavity (6) is fixedly connected to a plurality of second conductive rods (8), an electromagnet (5) is arranged in the connecting block (4), a first conductive rod (7) is fixedly connected to the main shaft (3), the first conductive rod (7) is fixedly connected to the connecting block (4), and a third conductive rod (9) is fixedly connected to the end of the second conductive rod (8) located in the functional cavity (6), The inner wall of the functional cavity (6) is fixedly connected to a plurality of permanent magnets (10); the first conductive rod (7) is electrically connected to the electromagnet (5) via a wire; two sliding grooves (11) are provided in the main body (1); the main body (1) is sealed and slidably connected to two sliders (12) via the sliding grooves (11); the two sliders (12) are fixedly connected to a lifting block (13); the lifting block (13) is a hollow structure; the lifting block (13) is provided with a through hole (14); the lifting block (13) is fixedly connected to a detection ring (15); an infrared transmitter (16) and an infrared receiver (17) are fixedly connected to the inner wall of the detection ring (15); an alarm (35) is fixedly connected to the upper surface of the main body (1); the infrared receiver (17) is connected to the alarm (35) via a PLC circuit; an annular cavity (18) is provided in the main body (1); a piston (20) is sealed and slidably connected to the annular cavity (18); The magnetic flux lines of the permanent magnet (10) point from the permanent magnet (10) to the axis of the main shaft (3), so that the third conductive rod (9) cuts the magnetic flux lines of the permanent magnet (10) during the rotation process, thereby generating an induced current. The first conductive rod (7) is electrically connected to the electromagnet (5) through a wire. When the main shaft (3) rotates, the third conductive rod (9) is driven to rotate through the second conductive rod (8). The third conductive rod (9) rotates to cut the magnetic flux lines of the permanent magnet (10), thereby generating an induced current. The induced current is supplied to the electromagnet (5), so that the electromagnet (5) generates a magnetic force. The electromagnet (5) can generate a magnetic attraction force on the drill needle. The magnetic attraction force is applied to the drill needle. The magnetic attraction force is used to counteract the stress that may cause the drill needle to break, thereby avoiding the occurrence of a broken needle. The phenomenon of the drill needle is avoided from the source. If the drill needle breaks, the magnetic attraction force of the electromagnet (5) on the drill needle can prevent the broken part of the drill needle from falling off, but continue to maintain a complete drill needle state.

2. A broken needle detection device for PCB processing equipment according to claim 1, characterized in that: A plurality of first springs (21) are fixedly connected between the piston (20) and the inner bottom wall of the annular cavity (18); a first tube (22) is fixedly connected through the main body (1); the first tube (22) connects the corresponding sliding groove (11) with the annular cavity (18); and hydraulic oil is filled between the inner top wall of the annular cavity (18) and the piston (20).

3. A broken needle detection device for PCB processing equipment according to claim 2, characterized in that: A plurality of limit rods (19) are fixedly connected between the inner top wall and the inner bottom wall of the annular cavity (18), and the limit rods (19) are slidably connected to the piston (20).

4. The broken needle detection device for PCB processing equipment according to claim 2, characterized in that: The detection ring (15) is provided with a plurality of absorption holes (33), and a plurality of brush bristles (34) are fixedly connected to the inner side wall of the detection ring (15).

5. The broken needle detection device for PCB processing equipment according to claim 4, characterized in that: The main body (1) is provided with a cleaning mechanism, the cleaning mechanism comprising a cavity (23), the cavity (23) being opened in the main body (1), two pump plates (24) being sealingly and slidably connected in the cavity (23), a plurality of second springs (25) being fixedly connected between the pump plates (24) and the inner wall of the cavity (23), a section of the main shaft (3) located in the cavity (23) being penetrated and fixedly connected with a cam (26), the main body (1) being penetrated and fixedly connected with two second tubes (27), one end of the second tube (27) being penetrated and extended into the cavity (23), and the other end of the second tube (27) being penetrated and extended to the outside of the main body (1), the lifting mechanism (25) being provided with a plurality of second springs (25) and a plurality of second springs (25) being fixedly connected between the pump plates (24) and the inner wall of the cavity (23), the main shaft (3) being penetrated and fixedly connected with a cam (26), The lowering block (13) is penetrated and fixedly connected with two third tubes (28), one end of the third tube (28) extends through the lifting block (13), and the other end extends through the corresponding second tube (27), the third tube (28) is sealed and slidably connected with the corresponding second tube (27), the main body (1) is provided with two processing holes (29), the processing holes (29) connect the cavity (23) with the outside, the main body (1) is rotatably connected with two blocking plates (30) through hinges, the blocking plate (30) is penetrated and fixedly connected with a fourth tube (31), and a filter screen (32) is arranged in the fourth tube (31).

6. A broken needle detection device for PCB processing equipment according to claim 5, characterized in that: Both the second pipe (27) and the fourth pipe (31) are provided with a one-way valve.

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