High-precision PLC board automatic precise positioning chip mounter

Abstract

The invention relates to the technical field of PLC boards, and discloses a high-precision PLC board automatic precise positioning chip mounter, which comprises a displacement part, the displacement part comprises a working table, the working table is slidably connected with a moving seat through a moving guide rail arranged on the upper surface of the working table, and a suction nozzle body is arranged in the moving seat; wherein the suction nozzle body comprises a suction nozzle rod, a cavity is formed in the suction nozzle rod, and a connecting base is arranged on the outer surface of the circumference of the suction nozzle rod in a sliding and sleeving mode. The automatic precise positioning chip mounter for the high-precision PLC board can effectively solve the problems that in the prior art, in the process of processing a PLC substrate, a surface-mounted element needs to be extracted through a suction nozzle in the chip mounter and then placed at a designated position on the PLC board, in the process, due to the fact that the suction nozzle is usually designed for an element with a specific size, the suction nozzle is usually designed for an oversized or undersized element, and the surface-mounted element is not required to be extracted and placed at the designated position on the PLC board. The problems that suction nozzles cannot be extracted, and suction nozzles of different models need to be replaced by shutdown in the chip mounting process, so that the adaptability is poor, and the production efficiency is low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of PLC boards, and in particular to a high-precision automatic and precise positioning chip placement machine for PLC boards. Background Art

[0002] PLC board, or programmable logic controller, is an electronic device used for industrial automation. It can perform logic or sequential control on various parameters in the production process according to the program compiled by the user to achieve automatic control of mechanical equipment. It has the characteristics of programmability, high reliability, strong flexibility, and easy maintenance. It is widely used in various industrial automation fields, such as manufacturing, energy, transportation, chemical industry, metallurgy, etc.

[0003] In the prior art, during the processing of the PLC substrate, the mounted components need to be extracted using the suction nozzle in the placement machine and then placed at the specified position on the PLC board. During this process, since the suction nozzle is usually designed for components of a specific size, the suction stability of the suction nozzle is poor for components that are too large or too small, and accurate extraction cannot be performed. During the placement process, the machine needs to be stopped to replace suction nozzles of different models, which has poor adaptability and low production efficiency. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a high-precision automatic and precise positioning placement machine for PLC boards, which can effectively solve the problem that in the process of processing PLC substrates in the prior art, the placement components need to be extracted by the suction nozzle in the placement machine and then placed at the specified position on the PLC board. In this process, since the suction nozzle is usually designed for components of a specific size, the suction nozzle cannot extract components that are too large or too small, and the placement process needs to be stopped to replace suction nozzles of different models, resulting in poor adaptability and low production efficiency.

[0006] Technical Solution

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

[0008] The present invention provides a high-precision PLC board automatic and accurate positioning placement machine, comprising:

[0009] A displacement part, the displacement part comprises a workbench, the workbench is slidably connected to a moving seat via a moving guide rail arranged on an upper surface thereof, and a nozzle body is arranged inside the moving seat;

[0010] The nozzle body comprises a nozzle rod, a cavity is formed inside the nozzle rod, and a connecting seat is slidably sleeved on the circumferential outer surface of the nozzle rod, the connecting seat and the nozzle rod are both hollow structured, and a nozzle head is fixedly connected to one end of the nozzle rod away from the connecting seat;

[0011] Among them, a diverter groove connected to the cavity is opened inside the suction nozzle head, and there are multiple diverter grooves. A sealing member that can be used to adjust the conduction state of the diverter groove is arranged inside the diverter groove. A receiving groove is opened on the lower surface of the suction nozzle head, and an adjusting member that can be used to adjust the opening and closing state of the sealing member is arranged inside the receiving groove.

[0012] Furthermore, a mounting hole is provided on the circumferential outer surface of the connecting seat, a limiting groove connected to the mounting hole is provided on the circumferential outer surface of the suction nozzle rod, a positioning pin is fixedly connected inside the mounting hole, and a spring is connected between adjacent surfaces of the connecting seat and the suction nozzle head.

[0013] Furthermore, the sealing member includes a lower ring plate, the circumferential outer surface of which is fixedly connected to the inner wall of the diverter groove, the upper surface of the lower ring plate is provided with an upper ring plate which fits with the inner wall of the diverter groove, the upper ring plate is rotatably connected to the upper ring plate via a buckle fixedly connected to its lower surface, a lower through hole is provided inside the lower ring plate, and an upper through hole is provided inside the upper ring plate.

[0014] Furthermore, the adjusting member includes an arc-shaped plate, the outer surface of which slides in contact with the inner wall of the accommodating groove, and the arc-shaped plate is rotatably connected to a connecting rod on one side close to the upper ring plate. Three arc-shaped plates are provided and distributed in a circular array with the upper ring plate as the center, and the three connecting rods are fixedly connected at one end away from the arc-shaped plate through a center seat.

[0015] Furthermore, an axial rod is rotatably connected at the center of the upper ring plate, and the axial rod passes through the upper ring plate and the lower ring plate in sequence from top to bottom.

[0016] Furthermore, an oblique groove is provided on the circumferential outer surface of the axial rod, and a connecting column which is fitted and slidably connected to the inner wall of the oblique groove is fixedly connected to the interior of the upper ring plate.

[0017] Furthermore, a support foot that can be used to buffer external elements is fixedly connected to the lower surface of the arc-shaped plate.

[0018] Beneficial Effects

[0019] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] The present invention is provided with a nozzle rod and a nozzle head. A plurality of diverter grooves connected with the inner cavity of the nozzle rod are provided inside the nozzle head. The sealing condition of the sealing member inside the diverter groove is determined by whether the supporting foot is in contact with the component. The sealing member can adapt to components within a certain range and adsorb them. When the area of ​​the component is smaller than the area of ​​the lower surface of the nozzle head, only the sealing member inside the diverter groove in contact with the upper surface of the component is in an open state, and the other sealing members remain in a sealed state. The adsorption range is precisely controlled within the required area, thereby ensuring the stability and consistency of the adsorption force, and being able to inhale more air under the same vacuum pressure. This generates a greater adsorption force, which can firmly adsorb the object; when the component area is greater than or equal to the area of ​​the lower surface of the nozzle head, the seals inside all the diverter slots are in an open state. When sucking larger components, the nozzle head with multiple diverter slots can evenly distribute the negative pressure in the vacuum pump on the upper surface of the component, so that the larger components can be adsorbed more stably. This stable adsorption force can ensure that the component will not be displaced or fall off during the mounting process, improve the accuracy and reliability of mounting, and ensure that components of different sizes within a certain range are accurately mounted on the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a nozzle body according to an embodiment of the present invention;

[0024] Figure 3 Schematic diagram of the separation structure of the nozzle rod, the connecting seat and the nozzle head according to an embodiment of the present invention;

[0025] Figure 4 A bottom view of a nozzle head according to an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of the cross-sectional structure of the nozzle head and the nozzle rod of an embodiment of the present invention;

[0027] Figure 6 For the embodiment of the present invention Figure 5 A schematic diagram of the structure with a partial enlargement at the center;

[0028] Figure 7 This is a schematic structural diagram of an upper ring plate, a lower ring plate and an adjusting member according to an embodiment of the present invention;

[0029] Figure 8 It is a schematic diagram of the separation structure of the axial rod, the upper ring plate and the lower ring plate according to an embodiment of the present invention.

[0030] The numbers in the figure represent respectively: 1. displacement part; 11. workbench; 12. moving guide rail; 13. moving seat; 2. nozzle body; 21. nozzle rod; 211. cavity; 212. limiting groove; 213. spring; 22. connecting seat; 23. nozzle head; 231. diverter groove; 232. accommodating groove; 24. sealing member; 241. lower ring plate; 2411. lower through hole; 242. upper ring plate; 2421. buckle; 2422. upper through hole; 243. axial rod; 2431. inclined groove; 2432. connecting column; 25. adjusting member; 251. arc plate; 252. connecting rod; 253. center seat; 254. supporting foot. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The present invention will be further described below in conjunction with the embodiments.

[0033] Example:

[0034] See also Figure 1-Figure 8 The present invention provides a technical solution: a high-precision PLC board automatic precision positioning placement machine, comprising:

[0035] The displacement part 1 includes a workbench 11, the workbench 11 is slidably connected to a moving seat 13 via a moving guide rail 12 arranged on the upper surface thereof, and a nozzle body 2 is arranged inside the moving seat 13;

[0036] The nozzle body 2 includes a nozzle rod 21, a cavity 211 is formed inside the nozzle rod 21, and a connecting seat 22 is slidably sleeved on the circumferential outer surface of the nozzle rod 21. The connecting seat 22 and the nozzle rod 21 are both hollow structured, and a nozzle head 23 is fixedly connected to one end of the nozzle rod 21 away from the connecting seat 22;

[0037] Among them, a diverter groove 231 connected to the cavity 211 is opened inside the suction nozzle head 23, and a plurality of diverter grooves 231 are arranged. A sealing member 24 which can be used to adjust the conduction state of the diverter groove 231 is arranged inside the diverter groove 231. A receiving groove 232 is opened on the lower surface of the suction nozzle head 23, and an adjusting member 25 which can be used to adjust the opening and closing state of the sealing member 24 is arranged inside the receiving groove 232.

[0038] A mounting hole is provided on the circumferential outer surface of the connecting seat 22, a limiting groove 212 connected to the mounting hole is provided on the circumferential outer surface of the suction nozzle rod 21, a positioning pin is fixedly connected inside the mounting hole, and a spring 213 is connected between adjacent surfaces of the connecting seat 22 and the suction nozzle head 23. The spring 213 is used for buffering when the suction nozzle body 2 moves down and contacts the component, thereby reducing wear on the suction nozzle body 2 and the component.

[0039] The seal 24 includes a lower ring plate 241, the circumferential outer surface of the lower ring plate 241 is fixedly connected to the inner wall of the diverter groove 231, and an upper ring plate 242 is provided on the upper surface of the lower ring plate 241 to fit the inner wall of the diverter groove 231. The upper ring plate 242 is rotatably connected to the upper ring plate 242 through a buckle 2421 fixedly connected to the lower surface thereof. A lower through hole 2411 is provided inside the lower ring plate 241, and an upper through hole 2422 is provided inside the upper ring plate 242. In the initial state, the upper through hole 2422 and the lower through hole 2411 are not connected to each other, and the diverter groove 231 is divided into upper and lower ends to maintain sealing.

[0040] The adjusting member 25 includes an arc-shaped plate 251, the outer surface of which slides in contact with the inner wall of the accommodating groove 232, and the arc-shaped plate 251 is rotatably connected to a connecting rod 252 on one side close to the upper ring plate 242. The arc-shaped plate 251 is provided with three arc-shaped plates 251 and distributed in a circular array with the upper ring plate 242 as the center, and the three connecting rods 252 are fixedly connected at one end away from the arc-shaped plate 251 through a center seat 253.

[0041] An axial rod 243 is rotatably connected at the center of the upper ring plate 242 , and the axial rod 243 passes through the upper ring plate 242 and the lower ring plate 241 in sequence from top to bottom.

[0042] The outer circumferential surface of the axial rod 243 is provided with an inclined groove 2431, and the interior of the upper ring plate 242 is fixedly connected with a connecting column 2432 that slides in contact with the inner wall of the inclined groove 2431. The axial rod 243 slides upward under the lifting action of the center seat 253, driving the connecting column 2432 in the upper ring plate 242 to rotate under the action of the inclined groove 2431.

[0043] The lower surface of the arc plate 251 is fixedly connected with a support foot 254 which can be used to buffer external components to avoid wear caused by contact with the components and the upper surface of the PLC board.

[0044] The process of absorbing the components to be mounted:

[0045] In actual application, the PLC board to be mounted is sent to the surface of the workbench 11 of the displacement part 1, and the position of the PLC board is ensured to be accurate through optical alignment or manual adjustment. The PLC board is firmly fixed on the workbench 11 using a clamp or other fixing device to prevent displacement during the mounting process. The moving guide rail 12 is started to drive the moving seat 13 to move toward the external feeding mechanism, and the nozzle body 2 arranged on the outer surface of the moving seat 13 moves synchronously. In the initial state, the nozzle body 2 is in a retracted state until the nozzle head 23 in the nozzle body 2 is located directly above the component to be sucked, and the nozzle body 2 moves downward in the moving seat 13 so that the lower surface of the nozzle head 23 is close to the upper surface of the component. When the component to be mounted is small, the diverter groove 231 at the edge of the nozzle head 23 can be selected to coincide with the center of the component to avoid interference with other components to be sucked.

[0046] In the initial state, the upper ring plate 242 and the lower ring plate 241 of the seal 24 are in a staggered distribution, the lower through hole 2411 and the upper through hole 2422 opened therein are not connected to each other, the diverter groove 231 is connected to the inside of the cavity 211, and the space surrounded by the nozzle head 23, the upper ring plate 242 and the nozzle rod 21 is in a sealed state and separated from the external air. Since the arc plate 251 has a certain weight, the arc plate 251 is inside the receiving groove 232, and under the influence of its gravitational potential energy, the support foot 254 at the bottom of the arc plate 251 protrudes below the nozzle head 23.

[0047] During the process of the lower surface of the nozzle head 23 approaching the upper surface of the component to be sucked, the lower surface of the support foot 254 at the bottom of the nozzle head 23 first contacts the upper surface of the component. At the moment of downward movement, the connecting seat 22 is sleeved on the outer surface of the nozzle rod 21 and slightly displaced downward. The spring 213 between the connecting seat 22 and the nozzle head 23 is squeezed to prevent the nozzle body 2 from damaging the component due to the large impact force during the descent process. At the same time, the limiting groove 212 opened on the outer surface of the circumference of the nozzle rod 21 ensures that during the movement of the nozzle body 2, the nozzle head 23 remains stable and does not rotate compared to the connecting seat 22, ensuring the accuracy of the component placement. After contact, the nozzle body 2 continues to move downward until the lower surface of the nozzle head 23 fits the upper surface of the component. During the downward squeezing of the nozzle body 2, the arc plate 251 moves upward in the receiving groove 232 due to the reverse force given by the component.

[0048] Two inclined grooves 2431 are arranged on the circumferential outer surface of the axial rod 243. The two inclined grooves 2431 are arranged in a circumferential array with the axial rod 243 as the axis. A limited sliding groove is arranged on the circumference of the axial rod 243 to ensure that the axial rod 243 is always in a state of up and down displacement inside the upper ring plate 242 and cannot rotate. In the initial state, the connecting column 2432 fixedly connected to the circumferential inner wall of the circular hole inside the upper ring plate 242 is at the top of the inner wall of the inclined groove 2431. The upper ring plate 242 is rotatably connected to the upper surface of the lower ring plate 241 under the action of the buckle 2421 on its lower surface. The circumferential outer surface of the connecting column 2432 is in contact with the inner wall of the inclined groove 2431. When the inner wall of the arc plate 251 close to the upper ring plate 242 is provided with a connecting rod 252, when the arc plate 251 moves upward When moving, the connecting rod 252 will be driven to move upward together, and the connecting rods 252 in three directions will move upward smoothly together, so that the center seat 253 in the middle will move smoothly toward the lower ring plate 241 until the center seat 253 moves into the circular groove at the center of the lower ring plate 241 and fits with the lower surface of the axial rod 243. As the arc plate 251 continues to move upward inside the accommodating groove 232, the center seat 253 pushes the axial rod 243 upward.

[0049] The inclined groove 2431 is formed on the outer circumferential surface of the axial rod 243. When the axial rod 243 moves vertically upward, the connecting column 2432 drives the upper ring plate 242 to rotate clockwise by a certain angle. The lower ring plate 241 is fixedly connected to the inner wall of the diverter groove 231, and the lower through hole 2411 formed inside the lower ring plate 241 is always in this position. After the upper ring plate 242 rotates by an angle, the upper through hole 2422 formed inside the upper ring plate 242 coincides with the lower through hole 2411 inside the lower ring plate 241. At this time, the upper through hole 2422 is connected to the inside of the lower through hole 2411.

[0050] When the adsorbed component is larger than the bottom area of ​​the nozzle head 23, the lower surfaces of all the supporting feet 254 inside the nozzle head 23 are in contact with the component until all the internal arc plates 251 are squeezed to the inner wall of the accommodating groove 232, and the upper surface of the component fits with the lower surface of the nozzle head 23; when the adsorbed component is smaller than the bottom area of ​​the nozzle head 23, the nozzle head 23 is optically aligned so that the center point of the diverter groove 231 coincides with the center position of the component. At this time, the lower surfaces of all the supporting feet 254 within the overlapping area of ​​the nozzle head 23 and the component are in contact with the component until all the corresponding arc plates 251 are squeezed to the inner wall of the accommodating groove 232, and the upper surface of the component fits with the lower surface of the nozzle head 23. Since the component has a certain thickness and protrudes from the surface of the placement platform, the supporting feet 254 within the overlapping area of ​​the nozzle head 23 that does not overlap with the component remain in their original state, so the corresponding sealing member 24 remains in its initial state, the interior is in a sealed state, and no air circulates with the outside.

[0051] Since the lower surface of the nozzle head 23 around the diverter groove 231 is in contact with the component, its interior is highly airtight and in a vacuum state. The accommodating groove 232 is connected to the inside of the diverter groove 231. The arc plate 251 is always in the accommodating groove 232 and remains in a contracted state. The center seat 253 follows it and is located in the circular groove at the center of the lower ring plate 241, keeping the axial rod 243 in a lifted state. The upper through hole 2422 is connected to the inside of the lower through hole 2411.

[0052] When there is a diverter groove 231 at the center position of the component, but its edge position cannot completely cover one of the open ends of the diverter grooves 231, that is, only one or two supporting feet 254 are in contact with the upper surface of the component, the supporting foot 254 in contact with the component drives the arc plate 251 to move upward, and the connecting rod 252 moves up together, and the supporting foot 254 and the connecting rod 252 that are not in contact with the component remain in a stable state. At this time, the three connecting rods 252 are not at the same height, and the center seat 253 fixed in the middle of the three connecting rods 252 is affected by it and is in a tilted state. Even if the supporting foot 254 that is not in contact with the component is pulled by the supporting foot 254 that moves upward, the center seat 253 is still in a tilted state, and the circumferential outer surface of the upper end of the center seat 253 is in contact with the inner wall of the circular groove at the center of the lower ring plate 241. When the center seat 253 is in a tilted state, it cannot be in contact with the axial rod 243 inside the circular groove, and thus cannot squeeze the axial rod 243 upward. When the edge of the component cannot completely cover the open end of one of the diverter grooves 231, the seal 24 still maintains a sealed state, ensuring the airtightness inside the single suction nozzle body 2, avoiding wasting adsorption force, and disrupting the external air circulation state of the suction nozzle head 23 to cause unstable component adsorption.

[0053] When the upper surface of the component fits with the lower surface of the suction nozzle head 23 around the squeezed arc plate 251, a vacuum pump for controlling the suction nozzle head 23 is also provided inside the movable seat 13. When the placement machine detects that the suction nozzle head 23 is above the component to be picked up and fits with it, the vacuum pump starts to start, and the air will pass through the upper through hole 2422 and the lower through hole 2411 to generate negative pressure suction, thereby forming a seal between the component and the diverter groove 231 below the suction nozzle head 23, and adsorbing the component. After the component is tightly adsorbed, the suction nozzle body 2 retracts upward, and the moving guide rail 12 starts to move the suction nozzle body 2 below the movable seat 13 to the position required for placement on the PLC substrate.

[0054] The process of mounting components:

[0055] When the nozzle body 2 moves to above the required mounting position, the nozzle body 2 moves downward as a whole inside the movable seat 13 until the lower surface of the component coincides with the upper surface of the PLC substrate. When the placement machine detects that the nozzle head 23 is above the PLC substrate to be mounted and is in contact with it, the vacuum pump stops working, the internal air pressure inside the diverter groove 231 is released, and the component is no longer affected by the adsorption force of the nozzle head 23. The inner top ends of the arc plate 251 and the axial rod 243 are equipped with counterweights. Therefore, after the internal air pressure is released, the arc plate 251 slides downward under the action of its own gravity, and the upper surface of the center seat 253 no longer squeezes the bottom end of the axial rod 243. The axial rod 243 also slides downward under the action of its own gravity. Since the downward sliding force of the axial rod 243 is greater than the friction force, the inclined groove 2431 opened on the circumferential outer surface of the axial rod 243 rotates relative to the upper ring plate 242. Since the axial rod 243 only moves up and down, the upper ring plate 242 rotates clockwise under the action of the downward movement of the axial rod 243 until the upper ring plate 242 returns to its initial position. The upper through hole 2422 inside the upper ring plate 242 and the lower through hole 2411 inside the lower ring plate 241 are staggered and not connected, separating the inside of the diverter slot 231.

[0056] When the nozzle body 2 moves upward inside the moving seat 13 and the arc plate 251 moves downward inside the receiving groove 232, the lower surface of the nozzle head 23 separates from the upper surface of the component. Under the action of its own gravity, the support foot 254 at the bottom of the arc plate 251 still fits with the upper surface of the component to ensure good contact between the component and the PLC board, so that the component fits more closely on the PLC board. The bottom of the support foot 254 is made of rubber material and will not wear the surface of the component. After that, the nozzle body 2 leaves the PLC board driven by the moving guide rail 12, ready to suck the next component and continue the mounting work.

[0057] In summary, the nozzle body 2 has the following advantages in the component placement process:

[0058] Advantage 1: The arc plate 251 protruding below the nozzle head 23 in the initial state can adjust the sealing state of the seal 24 according to whether there are components on its lower surface. When the support foot 254 at the bottom of the arc plate 251 contacts the component, it is subjected to a reaction force and squeezed upward, driving the upper ring plate 242 to rotate, so that the upper through hole 2422 is connected to the inside of the lower through hole 2411, and the seal 24 is in an open state; when the support foot 254 at the bottom of the arc plate 251 does not contact the component, the seal 24 inside the diverter trough 231 remains in a sealed state. The adjustment member 25 can quickly determine whether adsorption is required through the support foot 254, thereby saving a lot of time and improving the overall operation speed of the equipment.

[0059] Advantage 2: The lower surface of the nozzle head 23 is provided with a plurality of shunt grooves 231 connected with the cavity 211, which can adapt to components within a certain range and absorb and mount them. Since the adsorption force of the vacuum pump is the rated value, when the area of ​​the component is smaller than the area of ​​the lower surface of the nozzle head 23, only the internal seal 24 of the shunt groove 231 in contact with the upper surface of the component is in an open state, and the other seals 24 remain in a sealed state. The adsorption range is precisely controlled within the required area, ensuring the stability and consistency of the adsorption force, and being able to inhale more air under the same vacuum pressure, thereby generating a greater adsorption force. , which can firmly adsorb objects; when the component area is greater than or equal to the area of ​​the lower surface of the suction nozzle head 23, the seals 24 inside all the diverter grooves 231 are in an open state. When sucking larger components, the suction nozzle head 23 with multiple diverter grooves 231 can evenly distribute the negative pressure in the vacuum pump on the upper surface of the component, so that the larger component can be adsorbed more stably. This stable adsorption force can ensure that the component will not be displaced or fall off during the mounting process, improve the mounting accuracy and reliability, and ensure that components of different sizes within a certain range are accurately mounted on the circuit board.

[0060] Advantage three: when there are no components on the lower surface of the diverter groove 231, the seal 24 remains in a closed state; when there are components underneath, the seal 24 opens, but the internal space enclosed by the components and the diverter groove 231 is in a sealed state, which can prevent the vacuum system inside the nozzle body 2 from being exposed to the air for a long time, reducing the chance of dust, impurities and external solder paste entering the nozzle body 2, thereby reducing the risk of nozzle clogging and damage.

[0061] Advantage 4: Compared with ordinary suction nozzles, the suction force of the suction nozzle head 23 with multiple diversion grooves 231 is dispersed on multiple suction holes, and no concentrated pressure points are formed on the surface of the object, thereby reducing damage to the surface of the object. For some objects with easily scratched or indented surfaces, such as precision electronic components, optical lenses, etc., using a multi-hole suction nozzle can better protect their surface quality.

[0062] Advantage 5. When the seal 24 is in the open state, that is, the upper through hole 2422 and the lower through hole 2411 opened inside the upper ring plate 242 and the lower ring plate 241 are connected, since the upper ring plate 242 and the lower ring plate 241 are in contact with each other, when the vacuum pump is working to extract air, the upper through hole 2422 and the lower through hole 2411 can produce a "narrow tube effect". Due to the limiting effect of the through holes, the air flow velocity will increase. The increase in flow velocity helps to enhance the carrying capacity of the air flow, thereby enabling the nozzle head 23 to adsorb the component more tightly.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-precision PLC board automatic and accurate positioning placement machine, characterized in that: include: A displacement part (1), the displacement part (1) comprising a workbench (11), the workbench (11) being slidably connected to a moving seat (13) via a moving guide rail (12) arranged on an upper surface thereof, and a suction nozzle body (2) being arranged inside the moving seat (13); The nozzle body (2) comprises a nozzle rod (21), a cavity (211) is provided inside the nozzle rod (21), and a connecting seat (22) is slidably sleeved on the circumferential outer surface of the nozzle rod (21), the connecting seat (22) and the nozzle rod (21) both adopt a hollow structure design, and one end of the nozzle rod (21) away from the connecting seat (22) is fixedly connected to a nozzle head (23); The nozzle head (23) is provided with a diverter groove (231) in communication with the cavity (211), a plurality of diverter grooves (231) are provided, a sealing member (24) for adjusting the conduction state of the diverter groove (231) is provided inside the diverter groove (231), a receiving groove (232) is provided on the lower surface of the nozzle head (23), and an adjusting member (25) for adjusting the opening and closing state of the sealing member (24) is provided inside the receiving groove (232).

2. A high-precision PLC board automatic and accurate positioning placement machine according to claim 1, characterized in that: The circumferential outer surface of the connecting seat (22) is provided with a mounting hole, the circumferential outer surface of the suction nozzle rod (21) is provided with a limiting groove (212) connected to the mounting hole, a positioning pin is fixedly connected inside the mounting hole, and a spring (213) is connected between adjacent surfaces of the connecting seat (22) and the suction nozzle head (23).

3. A high-precision PLC board automatic and accurate positioning placement machine according to claim 1, characterized in that: The sealing member (24) comprises a lower ring plate (241), the circumferential outer surface of the lower ring plate (241) is fixedly connected to the inner wall of the diverter groove (231), the upper surface of the lower ring plate (241) is provided with an upper ring plate (242) which fits the inner wall of the diverter groove (231), the upper ring plate (242) is rotatably connected to the upper ring plate (242) via a buckle (2421) fixedly connected to the lower surface thereof, the lower ring plate (241) is provided with a lower through hole (2411) inside, and the upper ring plate (242) is provided with an upper through hole (2422) inside.

4. A high-precision PLC board automatic and accurate positioning placement machine according to claim 3, characterized in that: The adjusting member (25) comprises an arc-shaped plate (251), the outer surface of which is fitted and slidably connected to the inner wall of the receiving groove (232), and a connecting rod (252) is rotatably connected to one side of the arc-shaped plate (251) close to the upper ring plate (242), and three arc-shaped plates (251) are arranged in a circular array with the upper ring plate (242) as the center, and the ends of the three connecting rods (252) away from the arc-shaped plate (251) are fixedly connected via a center seat (253).

5. A high-precision PLC board automatic accurate positioning placement machine according to claim 4, characterized in that: An axial rod (243) is rotatably connected to the center of the upper ring plate (242), and the axial rod (243) passes through the upper ring plate (242) and the lower ring plate (241) in sequence from top to bottom.

6. A high-precision PLC board automatic accurate positioning placement machine according to claim 5, characterized in that: An oblique groove (2431) is formed on the circumferential outer surface of the axial rod (243), and a connecting column (2432) is fixedly connected to the interior of the upper ring plate (242) and is slidably fitted with the inner wall of the oblique groove (2431).

7. A high-precision PLC board automatic accurate positioning placement machine according to claim 4, characterized in that: A supporting foot (254) that can be used to buffer external elements is fixedly connected to the lower surface of the arc-shaped plate (251).

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