Smt pick-and-place machine nozzle cleaning device and cleaning process

Abstract

The application discloses a SMT chip mounter suction nozzle cleaning device and a cleaning process, and belongs to the technical field of suction nozzle cleaning of a chip mounter, which comprises a frame body and an integrated rotating head, a lifting telescopic cylinder is installed on the frame body, and a connecting seat is connected to the telescopic shaft end of the lifting telescopic cylinder; the integrated rotating head comprises a rotating head shell which is obliquely rotationally connected with the connecting seat, and a brush head mounting surface is formed by chamfering the outer edge of the bottom surface of the rotating head shell; a plurality of brush heads are vertically installed on the brush head mounting surface, the brush head comprises a rotating brush head which is rotationally installed on the brush head mounting surface and a telescopic brush head which is slidingly and telescopically installed on the brush head mounting surface; a driving motor which can rotationally drive the rotating brush head and telescopically drive the telescopic brush head and a station switching motor which can rotationally adjust the integrated rotating head are installed on the connecting seat; the overall structure is simple, convenient to use, can clean suction nozzles of various models of chip mounters, and is good in universality; the suction nozzles of the chip mounter can be efficiently, automatically and completely cleaned, manpower and material resources are saved, and work efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of SMT pick and place machine nozzle cleaning technology, specifically an SMT pick and place machine nozzle cleaning device and cleaning process. Background Technology

[0002] In the field of SMT (Surface Mount Technology), the application of pick-and-place machine nozzles is ubiquitous. Besides solder paste printing, placement is one of the key SMT process parameters; and the quality of placement depends entirely on the quality of the pick-and-place machine nozzles (equipment used in SMT placement machines that pick up and hold materials). Therefore, the nozzles are the lifeline for controlling placement quality. When nozzles become clogged or switching valves become inflexible, defects will occur in the SMT-produced PCBA (Printed Circuit Board Assembly). AOI (Automated Optical Inspection) inspection typically identifies two types of defects: misalignment and missing components.

[0003] Currently, there are seven common types of suction nozzles, each with varying orifice shapes. Because suction nozzles operate on a vacuum basis, some external objects can be sucked in. When the sucked-in dust, adhesive, and solder paste harden and form clumps, the nozzle will become clogged. If these foreign objects are not removed promptly, poor component pickup and placement performance will significantly decrease, resulting in issues such as: irregular component misalignment with corners; irregular component loss, especially with large and heavy components; inability to pick up components; and errors in component overlay. These are the aforementioned problems that can occur.

[0004] Currently, the most common way to clean the nozzles of SMT pick-and-place machines is by manual cleaning. This method is not only time-consuming and labor-intensive, but also has unsatisfactory cleaning results, and cannot thoroughly and efficiently clean the nozzles of the pick-and-place machine. Summary of the Invention

[0005] To address the problem that traditional manual cleaning methods for SMT pick-and-place machine nozzles are time-consuming, labor-intensive, and ineffective, failing to achieve thorough and efficient cleaning, this invention provides an SMT pick-and-place machine nozzle cleaning device and cleaning process.

[0006] This invention is achieved, in one respect, through the following technical solution:

[0007] A nozzle cleaning device for an SMT pick-and-place machine includes a frame and an integrated rotary head. A vertically downward-pointing lifting and telescopic cylinder is mounted on the frame, and a connecting seat is connected to the telescopic shaft end of the cylinder. The integrated rotary head includes a rotary head housing that is obliquely and rotatably connected to the connecting seat. The outer edge of the bottom surface of the rotary head housing is chamfered to form a brush head mounting surface. A plurality of brush heads are vertically mounted on the brush head mounting surface, including rotating brush heads rotatably mounted on the mounting surface and telescopic brush heads slidably and telescopically mounted on the mounting surface. The connecting seat is equipped with a drive motor capable of driving the rotating brush heads to rotate and the telescopic brush heads to extend and retract, and a station switching motor capable of adjusting the rotation of the integrated rotary head. The drive motor drives the integrated rotary head to rotate, causing the brush heads at the workstation to point vertically downward.

[0008] A further improvement of the present invention is that a connecting sleeve is provided at the center of the upper side of the rotating head housing, which is rotatably connected and installed with the connecting seat.

[0009] A further improvement of the present invention includes a drive motor output end connected to a rotating shaft mounted on the axis of the rotating head housing; a drive bevel gear connected to and mounted on the rotating shaft inside the rotating head housing; and a rotating brush head bevel gear that can mesh with the drive bevel gear mounted on the rod of the rotating brush head.

[0010] A further improvement of the present invention is that the driving bevel gear is provided with a boss, and the boss is provided with a plurality of protrusions that are intermittently pressed against the end face of the telescopic brush head rod. The telescopic brush head rod is fitted with a telescopic brush head support spring that can elastically support the telescopic brush head in the direction of the boss.

[0011] A further improvement of the present invention is that a guide key is installed on the rotating brush head bevel gear, and a keyway is provided on the surface of the rotating brush head rod to guide the guide key to slide along its axial direction; a rotating brush head bevel gear adjustment device is connected to the rotating brush head bevel gear, which can slide and adjust it.

[0012] A further improvement of the present invention is that the rotating brush head bevel gear adjustment device includes a rotating brush head control rod and a rotating brush head support bearing; the inner ring of the rotating brush head support bearing is connected and installed with the rotating brush head support bearing, and the outer ring of the rotating brush head support bearing is connected and installed with one end of the rotating brush head control rod; the other end of the rotating brush head control rod is adjustablely and slidably installed with the rotating head housing.

[0013] A further improvement of the present invention is that the telescopic brush head rod is connected to a telescopic brush head control rod that slides through the rotating head housing, and an adjusting nut that can abut against the outside of the rotating head housing is screwed onto the outer end of the telescopic brush head control rod.

[0014] A further improvement of the present invention is that a workstation switching bevel gear is installed at the output end of the workstation switching motor, and a workstation switching rack that meshes with the workstation switching bevel gear is provided on the upper side of the rotating head housing.

[0015] A further improvement of the present invention is that a guide rod is connected to the lifting and telescopic cylinder.

[0016] Another aspect of the present invention is achieved through the following technical solution:

[0017] A cleaning process for SMT pick and place machine nozzles, characterized in that it includes a primary cleaning zone, a secondary cleaning zone, a gripping robot, a nozzle conveyor line, and loading and unloading platforms located at the beginning and end of the nozzle conveyor line; the primary cleaning zone is equipped with the aforementioned SMT pick and place machine nozzle cleaning device.

[0018] It also includes the following steps:

[0019] S1: Place the pick-and-place machine nozzle to be cleaned into the tray, and place the tray onto the loading platform;

[0020] S2: The gripping robot grabs the pick-and-place machine nozzle from the tray and identifies its type; it controls the station's switching motor to rotate and selects the corresponding brush head to point vertically downwards.

[0021] S3: The gripping robot moves the gripped pick-and-place machine nozzle to the primary cleaning area and positions the pick-and-place machine nozzle to be cleaned directly below the brush head of the work station;

[0022] S4: Control the lifting telescopic cylinder to extend downwards, so that the brush head of the working station can be inserted into the nozzle of the pick-and-place machine to be cleaned; control the drive motor to run, so that the brush head of the working station can clean the nozzle of the pick-and-place machine to be cleaned.

[0023] S5: The cleaned pick-and-place machine nozzles are returned to the tray by the cleaning gripping robot;

[0024] S6: Repeat S3-S5 until all pick-and-place nozzles on the tray have been cleaned;

[0025] S7: The gripping robot picks up the tray and places it in the secondary cleaning area for ultrasonic cleaning;

[0026] S8: After ultrasonic cleaning is completed, the gripping robot places the tray onto the nozzle conveyor line;

[0027] S9: Controls the conveying of the nozzle conveyor line. After the tray is conveyed to the end of the nozzle conveyor line, it is unloaded from the unloading platform.

[0028] As can be seen from the above technical solutions, the beneficial effects of the present invention are:

[0029] Select the corresponding brush head according to the pick-and-place machine nozzle model. This involves controlling the station switching motor to rotate and selecting the appropriate brush head vertically downwards; extending the lifting and telescopic cylinder downwards to insert the brush head into the nozzle to be cleaned; controlling the drive motor to rotate or extend the brush head to clean the nozzle (rotating brush head for rotation, telescopic brush head for extension); after cleaning, the drive motor stops, the lifting and telescopic cylinder retracts upwards, and the brush head moves upwards, completing the automatic cleaning of the pick-and-place machine nozzle. The overall structure is simple, easy to use, and can clean various types of pick-and-place machine nozzles, offering good versatility. It provides efficient, automatic, and thorough cleaning of nozzles, saving manpower and resources, improving work efficiency, and demonstrating high practicality. Attached Figure Description

[0030] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the pick-and-place machine nozzle cleaning device according to a specific embodiment of the present invention.

[0032] Figure 2 This is a schematic diagram of the integrated rotor structure according to a specific embodiment of the present invention.

[0033] Figure 3 This is a schematic diagram of the first cross-sectional structure of the integrated rotor according to a specific embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the second cross-sectional structure of the integrated rotor according to a specific embodiment of the present invention.

[0035] Figure 5 This is a schematic diagram of the integrated rotating head installation structure according to a specific embodiment of the present invention.

[0036] Figure 6 This is a schematic diagram of the process equipment layout for a specific embodiment of the present invention.

[0037] In the attached diagram: 1. Frame, 2. Lifting and telescopic cylinder, 21. Guide rod, 3. Connecting seat, 4. Drive motor, 5. Station switching motor, 51. Mounting bracket, 52. Station switching bevel gear, 53. Station switching rack, 6. Integrated rotating head, 61. Rotating head housing, 62. Rotating brush head, 621. Rotating brush head bevel gear, 622. Rotating brush head support bearing, 623. Rotating brush head control rod, 624. Adjusting screw, 63. Telescopic brush head, 631. Telescopic brush head support spring, 632. Telescopic brush head control rod, 633. Adjusting nut, 64. Connecting sleeve, 65. Rotating shaft, 66. Drive bevel gear, 661. Protrusion, 7. Gripping robot, 8. Suction nozzle conveyor line, 9. Loading platform, 10. Unloading platform. Detailed Implementation

[0038] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0039] like Figure 1 As shown, an optional embodiment of the present invention discloses an SMT pick-and-place machine nozzle cleaning device, including a frame 1 and an integrated rotating head 6. A vertically downward lifting telescopic cylinder 2 is installed on the frame 1, and a connecting seat 3 is connected to the telescopic shaft end (lower end) of the lifting telescopic cylinder 2. The integrated rotating head 6 includes a rotating head housing 61 that is obliquely and rotatably connected to the connecting seat 3. The rotating head housing 61 has a disc-shaped structure, and a chamfered surface is provided on the outer edge of the bottom surface of the rotating head housing 61. This chamfered surface is a brush head mounting surface. Several brush heads are vertically installed on the brush head mounting surface, and the several brush heads are evenly spaced and distributed in a ring. The several brush heads include a rotating brush head 62 that is rotatably installed on the brush head mounting surface and a telescopic brush head 63 that is slidably and telescopically installed on the brush head mounting surface. A drive motor 4 that can drive the rotating brush head 62 to rotate and the telescopic brush head 63 to extend and retract is installed on the connecting seat 3, and a work position switching motor 5 that can adjust the rotation of the integrated rotating head 6. The drive motor 4 drives the integrated rotating head 6 to rotate, so that the brush head of the work position is vertically downward.

[0040] When using this SMT pick-and-place machine nozzle cleaning device, the pick-and-place machine nozzle to be cleaned is placed under and fixed under the integrated rotating head 6. The corresponding brush head is selected according to the nozzle model, i.e., the station switching motor 5 is rotated to select the corresponding brush head vertically downwards. The lifting telescopic cylinder 2 is extended downwards, allowing the brush head (vertically downwards) of the work station to be inserted into the pick-and-place machine nozzle to be cleaned. The drive motor 4 is operated, driving the brush head (connecting seat 3, integrated rotating head 6) of the work station to rotate or extend and retract to clean the pick-and-place machine nozzle (rotating brush head 62 is used for rotation cleaning, and telescopic brush head 63 is used for telescopic cleaning). After cleaning, the drive motor 4 stops, the lifting telescopic cylinder 2 retracts upwards, and the brush head (connecting seat 3, integrated rotating head 6) of the work station moves upwards, completing the automatic cleaning operation of the pick-and-place machine nozzle. With a simple overall structure and convenient use, it can clean the nozzles of various types of pick-and-place machines, making it highly versatile. It can also clean the nozzles of pick-and-place machines efficiently, automatically, and thoroughly, saving manpower and resources, improving work efficiency, and making it highly practical.

[0041] The rotating brush head 62 corresponds to a circular pick-and-place machine nozzle (including cylindrical, funnel-shaped, etc.) and is a single-hole pick-and-place machine nozzle; the telescopic brush head 63 corresponds to a non-circular pick-and-place machine nozzle or a multi-hole pick-and-place machine nozzle. The brush head is designed to conform to the shape of the pick-and-place machine nozzle.

[0042] To ensure the smoothness of the telescopic lifting cylinder 2's extension and retraction movements and prevent left-right swaying, the telescopic lifting cylinder 2 can adopt a servo electric cylinder structure with guide rods 21 on both sides. The vertical guidance via the guide rods 21 ensures the smoothness and reliability of the telescopic lifting cylinder 2's movements; furthermore, the use of a servo electric cylinder ensures the smoothness and precision of the extension and retraction movements, is easy to operate, and guarantees reliable cleaning of the pick-and-place machine's nozzle.

[0043] The upper center of the rotating head housing 61 is provided with a connecting sleeve 64, which is rotatably connected to the connecting seat 3. The connecting sleeve 64 is connected to the connecting seat 3 via a bearing, and the rotating shaft 65 is rotatably disposed within the connecting sleeve 64.

[0044] like Figure 3As shown, another optional embodiment of the present invention discloses an SMT pick-and-place machine nozzle cleaning device, including a frame 1 and an integrated rotating head 6. A vertically downward lifting telescopic cylinder 2 is installed on the frame 1, and a connecting seat 3 is connected to the telescopic shaft end of the lifting telescopic cylinder 2. The integrated rotating head 6 includes a rotating head housing 61 that is obliquely and rotatably connected to the connecting seat 3. The rotating head housing 61 has a disc-shaped structure, and a chamfered surface is provided on the outer edge of the bottom surface of the rotating head housing 61. This chamfered surface is a brush head mounting surface. Several brush heads are vertically installed on the brush head mounting surface, and the several brush heads are evenly spaced and distributed in a ring. The several brush heads include a rotating brush head 62 that is rotatably installed on the brush head mounting surface and a telescopic brush head 63 that is slidably and telescopically installed on the brush head mounting surface. A drive motor 4 that can drive the rotating brush head 62 to rotate and the telescopic brush head 63 to extend and retract is installed on the connecting seat 3, and a work position switching motor 5 that can adjust the rotation of the integrated rotating head 6. The drive motor 4 drives the integrated rotating head 6 to rotate, so that the brush head of the work position is vertically downward. The output end of the drive motor 4 is connected to a rotating shaft 65 located on the axis of the rotating head housing 61; the rotating head housing 61 is provided with an active bevel gear 66 connected to the rotating shaft 65; the rod of the rotating brush head 62 is equipped with a rotating brush head bevel gear 621 that can mesh with the active bevel gear 66.

[0045] When using this SMT pick-and-place machine nozzle cleaning device, the pick-and-place machine nozzle to be cleaned is placed under the integrated rotating head 6 and fixed. The corresponding rotating brush head 62 is selected according to the nozzle model, i.e., the station switching motor 5 is rotated, and the corresponding rotating brush head 62 is selected vertically downwards. The lifting telescopic cylinder 2 is controlled to extend downwards, allowing the rotating brush head 62 of the work station to insert into the pick-and-place machine nozzle to be cleaned. The drive motor 4 is controlled to operate, driving the active bevel gear 66 to rotate via the rotating shaft 65. The rotating brush head bevel gear 621 meshes with the active bevel gear 66, thereby enabling the rotating brush head 62 of the work station to rotate and clean the pick-and-place machine nozzle. Water spraying can also be used to further enhance the cleaning process. After cleaning, the drive motor 4 stops, the rotating brush head 62 stops rotating, the lifting telescopic cylinder 2 retracts upwards, and the rotating brush head 62 of the work station moves upwards, completing the automatic cleaning operation of the pick-and-place machine nozzle. With a simple overall structure and convenient use, it can perform rotating cleaning operations on nozzles of various types of pick-and-place machines, making it highly versatile. It can also efficiently, automatically, and thoroughly clean pick-and-place machine nozzles, saving manpower and resources, improving work efficiency, and making it highly practical.

[0046] like Figure 3As shown, another optional embodiment of the present invention discloses an SMT pick-and-place machine nozzle cleaning device, including a frame 1 and an integrated rotating head 6. A vertically downward lifting and telescopic cylinder 2 is mounted on the frame 1, and a connecting seat 3 is connected to the telescopic shaft end of the lifting and telescopic cylinder 2. The integrated rotating head 6 includes a rotating head housing 61 that is obliquely and rotatably connected to the connecting seat 3. The rotating head housing 61 has a disc-shaped structure, and a chamfered surface is provided on the outer edge of the bottom surface of the rotating head housing 61, which serves as a brush head mounting surface. A plurality of brush heads are vertically mounted on the brush head mounting surface, and the plurality of brush heads are evenly spaced and distributed in a ring. The plurality of brush heads includes a rotating brush head 6 rotatably mounted on the brush head mounting surface. 2. A telescopic brush head 63 is slidably and telescopically mounted on the brush head mounting surface; a drive motor 4 capable of driving the rotation of the rotating brush head 62 and the telescopic brush head 63, and a station switching motor 5 capable of adjusting the rotation of the integrated rotating head 6 are mounted on the connecting seat 3; the drive motor 4 drives the integrated rotating head 6 to rotate, so that the brush head in the working position is vertically downward; the output end of the drive motor 4 is connected to and mounted on a rotating shaft 65 set on the axis of the rotating head housing 61; the rotating head housing 61 is provided with an active bevel gear 66 connected and mounted to the rotating shaft 65; the rod of the rotating brush head 62 is equipped with a rotating brush head bevel gear 621 that can mesh with the active bevel gear 66. A guide key is installed on the inner ring of the rotating brush head bevel gear 621. A keyway is formed on the surface of the rotating brush head 62 rod to guide the guide key along its axial direction. The keyway is in the axial direction of the rotating brush head 62 rod. A rotating brush head bevel gear adjustment device is connected to the rotating brush head bevel gear 621, which can slide and adjust the rotating brush head bevel gear 621 along the axial direction of the rotating brush head 62 rod. The rotating brush head bevel gear adjustment device includes a rotating brush head control rod 623 and a rotating brush head support bearing 622. The inner ring of the rotating brush head support bearing 622 is connected and installed to the rotating brush head support bearing 622, and the outer ring of the rotating brush head support bearing 622 is connected and installed to one end (inner end) of the rotating brush head control rod 623. The other end (outer end) of the rotating brush head control rod 623 is adjustablely and slidably installed to the rotating head housing 61.

[0047] When using this SMT pick-and-place machine nozzle cleaning device, the pick-and-place machine nozzle to be cleaned is placed under the integrated rotating head 6 and fixed. The corresponding rotating brush head 62 is selected according to the nozzle model, i.e., the station switching motor 5 is rotated, and the corresponding rotating brush head 62 is selected vertically downwards. By adjusting the relative position of the rotating brush head control rod 623 and the rotating head housing 61 (brush head mounting surface), i.e., inward and outward sliding adjustment, the rotating brush head bevel gear 621 on the working station rotating brush head 62 rod can slide upwards and mesh with the driving bevel gear 66. (And by adjusting the rotating brush head control rod 623 on other non-working station rotating brush heads 62, the rotating brush head bevel gear 621 on the non-working station rotating brush heads 62 can be separated from the driving bevel gear 66, ensuring that only the working station rotating brush head 62 can rotate during cleaning, avoiding power loss.) (To reduce costs and improve efficiency); control the lifting and telescopic cylinder 2 to extend downwards, so that the rotating brush head 62 of the working station is inserted into the pick-and-place machine nozzle to be cleaned; control the drive motor 4 to run, drive the active bevel gear 66 to rotate through the rotating shaft 65, and through the rotating brush head bevel gear 621 on the working station rotating brush head 62 meshing with the active bevel gear 66, thereby realizing the rotating brush head 62 of the working station to rotate and clean the pick-and-place machine nozzle to be cleaned. At the same time, water spraying can be used to make the cleaning more thorough; after cleaning, the drive motor 4 stops, the rotating brush head 62 stops rotating, the lifting and telescopic cylinder 2 retracts upwards, driving the rotating brush head 62 of the working station to move upwards, and by adjusting the rotating brush head control rod 623 on the rotating brush head 62, the rotating brush head bevel gear 621 on the rotating brush head 62 is separated from the active bevel gear 66; thus completing the automatic cleaning operation of the pick-and-place machine nozzle. With a simple overall structure and convenient use, it can perform rotating cleaning operations on nozzles of various types of pick-and-place machines, making it highly versatile. It can also efficiently, automatically, and thoroughly clean pick-and-place machine nozzles, saving manpower and resources, improving work efficiency, and making it highly practical.

[0048] Furthermore, the outer end of the rotating brush head control rod 623 slides through the rotating head housing 61 (brush head mounting surface) and has a bent section. The rotating brush head control rod 623 is parallel to the rod of the rotating brush head 62. An adjusting screw 624, which can be screwed onto the bent section at the outer end of the rotating brush head control rod 623, is rotatably mounted to it. By rotating the adjusting screw 624, the rotating brush head control rod 623 can slide and extend relative to the rotating head housing 61, thereby realizing the sliding adjustment of the rotating brush head bevel gear 621 on the rotating brush head 62. This allows for flexible engagement and disengagement of the rotating brush head bevel gear 621 and the driving bevel gear 66. The structure is simple and easy to implement.

[0049] Additionally, the outer end of the rotating brush head control lever 623 slides through the rotating head housing 61 (brush head mounting surface). A power device capable of slidingly driving the rotating brush head control lever 623 can be installed on the rotating head housing 61, replacing the adjusting screw 624. This power device can be a telescopic cylinder (including a miniature electric cylinder, pneumatic cylinder, etc.). Automatic control of the engagement and disengagement of the rotating brush head bevel gear 621 and the driving bevel gear 66 can be achieved, eliminating the need for manual adjustment and improving operational convenience.

[0050] like Figure 4 As shown, another optional embodiment of the present invention discloses an SMT pick-and-place machine nozzle cleaning device, including a frame 1 and an integrated rotating head 6. A vertically downward lifting telescopic cylinder 2 is installed on the frame 1, and a connecting seat 3 is connected to the telescopic shaft end of the lifting telescopic cylinder 2. The integrated rotating head 6 includes a rotating head housing 61 that is obliquely and rotatably connected to the connecting seat 3. The rotating head housing 61 has a disc-shaped structure, and a chamfered surface is provided on the outer edge of the bottom surface of the rotating head housing 61. This chamfered surface is a brush head mounting surface. Several brush heads are vertically installed on the brush head mounting surface, and the several brush heads are evenly spaced and distributed in a ring. The several brush heads include a rotating brush head 62 that is rotatably installed on the brush head mounting surface and a telescopic brush head 63 that is slidably and telescopically installed on the brush head mounting surface. A drive motor 4 that can drive the rotating brush head 62 to rotate and the telescopic brush head 63 to extend and retract is installed on the connecting seat 3, and a work position switching motor 5 that can adjust the rotation of the integrated rotating head 6. The drive motor 4 drives the integrated rotating head 6 to rotate, so that the brush head of the work position is vertically downward. The active bevel gear 66 is provided with a boss, and several protrusions 661 are provided in a ring at intervals on the boss, which can intermittently press against the inner end face of the telescopic brush head 63 rod. The telescopic brush head 63 rod is fitted with a telescopic brush head support spring 631 that can elastically support the telescopic brush head 63 towards the boss.

[0051] When using this SMT pick-and-place machine nozzle cleaning device, the pick-and-place machine nozzle to be cleaned is placed under the integrated rotating head 6 and fixed. The corresponding telescopic brush head 63 is selected according to the nozzle model; that is, the station switching motor 5 is rotated to select the corresponding telescopic brush head 63 vertically downwards. The lifting telescopic cylinder 2 is controlled to extend downwards, allowing the telescopic brush head 63 of the work station to insert into the pick-and-place machine nozzle to be cleaned. The drive motor 4 is controlled to operate, driving the active bevel gear 66 to rotate via the rotating shaft 65. The protrusions 661 spaced on the boss intermittently press against the inner end face of the telescopic brush head 63 rod, and the telescopic brush head support spring 631 elastically supports the telescopic brush head 63 towards the boss, thus enabling the telescopic brush head 63 of the work station to extend and retract to clean the pick-and-place machine nozzle. Water spraying can also be used to make the cleaning more thorough. After cleaning, the drive motor 4 stops, the telescopic brush head 63 stops extending and retracting, the lifting telescopic cylinder 2 retracts upwards, and the telescopic brush head 63 of the work station moves upwards, completing the automatic cleaning operation of the pick-and-place machine nozzle. With a simple overall structure and convenient use, it can perform rotating cleaning operations on nozzles of various types of pick-and-place machines, making it highly versatile. It can also efficiently, automatically, and thoroughly clean pick-and-place machine nozzles, saving manpower and resources, improving work efficiency, and making it highly practical.

[0052] The telescopic brush head 63 has a baffle that abuts against the telescopic brush head support spring 631. A telescopic brush head control rod 632, which slides through the rotating head housing 61 (brush head mounting surface), is connected to the baffle. An adjusting nut 633 is screwed onto the outer end of the telescopic brush head control rod 632, abutting against the outer side of the rotating head housing 61 (brush head mounting surface). When the telescopic brush head 63 is not in use, rotating the adjusting nut 633 abutting against the brush head mounting surface allows the telescopic brush head 63 to be pulled outwards by the telescopic brush head control rod 632, overcoming the telescopic brush head support spring 631. This completely separates the telescopic brush head 63 from the driving bevel gear 66, ensuring energy efficiency and reducing power waste. Similarly, when the telescopic brush head 63 is in use, rotating the adjusting nut 633 in the opposite direction allows the inner end face of the telescopic brush head 63 to abut against the protrusion 661, ensuring reliable telescopic movement.

[0053] Additionally, a power device capable of slidingly driving the telescopic brush head control rod 632 can be installed on the rotating head housing 61, replacing the adjusting nut 633. This power device can be a telescopic cylinder (including a miniature electric cylinder, pneumatic cylinder, etc.). It enables automatic control of the engagement and disengagement of the inner end face of the telescopic brush head 63 rod with the protrusion 661, eliminating the need for manual adjustment and improving operational convenience.

[0054] like Figure 1 , 5As shown, another optional embodiment of the present invention discloses an SMT pick-and-place machine nozzle cleaning device, including a frame 1 and an integrated rotating head 6. A vertically downward lifting telescopic cylinder 2 is installed on the frame 1, and a connecting seat 3 is connected to the telescopic shaft end (lower end) of the lifting telescopic cylinder 2. The integrated rotating head 6 includes a rotating head housing 61 that is obliquely and rotatably connected to the connecting seat 3. The rotating head housing 61 has a disc-shaped structure, and a chamfered surface is provided on the outer edge of the bottom surface of the rotating head housing 61. The chamfered surface is a brush head mounting surface. A plurality of brush heads are vertically installed on the brush head mounting surface, and the plurality of brush heads are evenly spaced and distributed in a ring. The plurality of brush heads include a rotating brush head 62 that is rotatably installed on the brush head mounting surface and a telescopic brush head 63 that is slidably and telescopically installed on the brush head mounting surface. A drive motor 4 that can drive the rotating brush head 62 to rotate and the telescopic brush head 63 to extend and retract is installed on the connecting seat 3, and a work position switching motor 5 that can adjust the rotation of the integrated rotating head 6. The drive motor 4 drives the integrated rotating head 6 to rotate, so that the brush head of the work position is vertically downward. The workstation switching motor 5 is connected to the connecting seat 3 via the mounting bracket 51. The output end of the workstation switching motor 5 is equipped with a workstation switching bevel gear 52. The upper side of the rotating head housing 61 is provided with a workstation switching rack 53 that meshes with the workstation switching bevel gear 52. The workstation switching rack 53 is arranged in a ring.

[0055] When using this SMT pick-and-place machine nozzle cleaning device, the pick-and-place machine nozzle to be cleaned is placed under and fixed under the integrated rotating head 6. The corresponding brush head is selected according to the nozzle model, i.e., the station switching motor 5 is controlled to rotate. Through the meshing of the station switching bevel gear 52 and station switching rack 53, the rotation of the integrated rotating head 6 is adjusted, and the corresponding brush head is selected vertically downwards. The lifting and telescopic cylinder 2 is controlled to extend downwards, allowing the brush head (vertically downwards) of the working station to be inserted into the pick-and-place machine nozzle to be cleaned. The drive motor 4 is controlled to operate, driving the brush head (connecting seat 3, integrated rotating head 6) of the working station to rotate or extend and retract to clean the pick-and-place machine nozzle (rotating brush head 62 is used for rotation cleaning, and telescopic brush head 63 is used for telescopic cleaning). After cleaning, the drive motor 4 stops, the lifting and telescopic cylinder 2 retracts upwards, driving the brush head (connecting seat 3, integrated rotating head 6) of the working station to move upwards, completing the automatic cleaning operation of the pick-and-place machine nozzle. With a simple overall structure and convenient use, it can clean the nozzles of various types of pick-and-place machines, making it highly versatile. It can also clean the nozzles of pick-and-place machines efficiently, automatically, and thoroughly, saving manpower and resources, improving work efficiency, and making it highly practical.

[0056] Among them, the workstation switching motor 5 adopts a servo motor or a stepper motor, which can ensure the accuracy and reliability of adjusting the rotation angle of the integrated rotor 6.

[0057] Among them, the rotating shaft 65 is installed at an angle of 45 degrees, that is, the integrated rotating head 6 (rotating head housing 61 and driving bevel gear 66) are both installed at an angle of 45 degrees.

[0058] like Figure 6 As shown, the present invention also discloses an SMT pick and place machine nozzle cleaning process, including a primary cleaning zone, a secondary cleaning zone, a gripping robot 7, a nozzle conveyor line 8, and loading platforms 9 and unloading platforms 10 set at the beginning and end of the nozzle conveyor line 8; the SMT pick and place machine nozzle cleaning device is provided in the primary cleaning zone.

[0059] It also includes the following steps:

[0060] S1: Place the pick-and-place machine nozzle to be cleaned into the tray, and place the tray onto the loading platform 9;

[0061] S2: The gripping robot 7 grips the pick-and-place machine nozzle in the tray and identifies the type; it controls the station switching motor 5 to rotate, and through the meshing of the station switching bevel gear 52 and the station switching rack 53, it realizes the rotation adjustment of the integrated rotating head 6 and selects the corresponding brush head to be vertically downward.

[0062] S3: The gripping robot 7 moves the gripped pick-and-place machine nozzle to the primary cleaning area and positions the pick-and-place machine nozzle to be cleaned directly below the work station brush head;

[0063] S4: Control the lifting telescopic cylinder 2 to extend downwards, so that the brush head of the working station is inserted into the nozzle of the pick-and-place machine to be cleaned; control the drive motor 4 to run, so that the brush head of the working station can clean the nozzle of the pick-and-place machine to be cleaned (rotating brush head 62 is used for rotating cleaning, and telescopic brush head 63 is used for telescopic cleaning); and can be used in conjunction with water spraying.

[0064] S5: The cleaned pick-and-place machine nozzle is returned to the tray by the cleaning gripping robot 7;

[0065] S6: Repeat S3-S5 until all pick-and-place nozzles on the tray have been cleaned;

[0066] S7: The gripping robot 7 grips the tray and places it in the secondary cleaning area for ultrasonic cleaning;

[0067] S8: After ultrasonic cleaning is completed, the gripping robot 7 places the tray onto the nozzle conveyor line 8;

[0068] S9: Control the conveying of the nozzle conveyor line 8. After the tray is conveyed to the end of the nozzle conveyor line 8, it is unloaded from the unloading platform 10.

[0069] This SMT pick-and-place machine nozzle cleaning device and process involves selecting the appropriate brush head based on the nozzle model. The station switching motor 5 rotates, selecting the corresponding brush head vertically downwards. The lifting and telescopic cylinder 2 extends downwards, inserting the brush head into the nozzle to be cleaned. The drive motor 4 rotates, causing the brush head to rotate or extend / retract to clean the nozzle (rotating brush head 62 for rotation, telescopic brush head 63 for extension / retraction). After cleaning, the drive motor 4 stops, the lifting and telescopic cylinder 2 retracts upwards, and the brush head moves upwards, completing the automatic cleaning of the pick-and-place machine nozzle. The overall structure is simple and easy to use, capable of cleaning various types of pick-and-place machine nozzles, offering good versatility. It provides efficient, automatic, and thorough cleaning of nozzles, saving manpower and resources, improving work efficiency, and demonstrating high practicality.

[0070] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0071] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0072] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A nozzle cleaning device for an SMT pick-and-place machine, comprising a frame (1) and an integrated rotating head (6), characterized in that, A vertically downward lifting telescopic cylinder (2) is installed on the frame (1), and a connecting seat (3) is connected to the telescopic shaft end of the lifting telescopic cylinder (2); the integrated rotating head (6) includes a rotating head housing (61) that is tilted and rotatably connected to the connecting seat (3), and the outer edge of the bottom surface of the rotating head housing (61) is chamfered to form a brush head mounting surface; several brush heads are vertically installed on the brush head mounting surface, including a rotating brush head (62) that is rotatably installed on the brush head mounting surface and a telescopic brush head (63) that is slidably telescopically installed on the brush head mounting surface. The rotating brush head (62) corresponds to a single-hole circular pick-and-place machine nozzle, and the telescopic brush head (63) corresponds to a non-circular pick-and-place machine nozzle or a multi-hole pick-and-place machine nozzle. The brush head is designed to conform to the shape of the pick-and-place machine nozzle. The connecting seat (3) is equipped with a drive motor (4) that can drive the rotating brush head (62) to rotate and the telescopic brush head (63) to extend and retract, and a station switching motor (5) that can adjust the rotation of the integrated rotating head (6). The station switching motor (5) drives the integrated rotating head (6) to rotate, so that the brush head at the working position is vertically downward.

2. The SMT pick-and-place machine nozzle cleaning device according to claim 1, characterized in that, A connecting sleeve (64) is provided on the upper center of the rotating head housing (61) and is rotatably connected to the connecting seat (3).

3. The SMT pick-and-place machine nozzle cleaning device according to claim 1, characterized in that, The output end of the drive motor (4) is connected to a rotating shaft (65) set on the axis of the rotating head housing (61); the rotating head housing (61) is provided with an active bevel gear (66) connected to the rotating shaft (65); the rod of the rotating brush head (62) is equipped with a rotating brush head bevel gear (621) that can mesh with the active bevel gear (66).

4. The SMT pick-and-place machine nozzle cleaning device according to claim 3, characterized in that, The active bevel gear (66) is provided with a boss, and a number of protrusions (661) are provided on the boss in a ring at intervals, which can intermittently press against the end face of the telescopic brush head (63). The telescopic brush head (63) is fitted with a telescopic brush head support spring (631) that can elastically support the telescopic brush head (63) towards the boss.

5. The SMT pick-and-place machine nozzle cleaning device according to claim 3, characterized in that, A guide key is installed on the rotating brush head bevel gear (621), and a keyway is provided on the surface of the rotating brush head (62) rod to guide the guide key to slide along its axial direction; a rotating brush head bevel gear adjustment device is connected to the rotating brush head bevel gear (621) to adjust it by sliding.

6. The SMT pick-and-place machine nozzle cleaning device according to claim 5, characterized in that, The rotating brush head bevel gear adjustment device includes a rotating brush head control rod (623) and a rotating brush head support bearing (622); the inner ring of the rotating brush head support bearing (622) is connected and installed with the rotating brush head support bearing (622), and the outer ring of the rotating brush head support bearing (622) is connected and installed with one end of the rotating brush head control rod (623); the other end of the rotating brush head control rod (623) is adjustablely and slidably installed with the rotating head housing (61).

7. The SMT pick-and-place machine nozzle cleaning device according to claim 4, characterized in that, The telescopic brush head (63) has a telescopic brush head control rod (632) that slides through the rotating head housing (61). The outer end of the telescopic brush head control rod (632) is screwed with an adjusting nut (633) that can abut against the outside of the rotating head housing (61).

8. The SMT pick-and-place machine nozzle cleaning device according to claim 1, characterized in that, The output end of the workstation switching motor (5) is equipped with a workstation switching bevel gear (52), and the upper side of the rotating head housing (61) is provided with a workstation switching rack (53) that meshes with the workstation switching bevel gear (52).

9. The SMT pick-and-place machine nozzle cleaning device according to claim 1, characterized in that, A guide rod (21) is connected to the lifting telescopic cylinder (2).

10. A nozzle cleaning process for an SMT pick-and-place machine, characterized in that, The equipment for implementing this process includes a primary cleaning zone, a secondary cleaning zone, a gripping robot (7), a nozzle conveyor line (8), and loading platforms (9) and unloading platforms (10) located at the beginning and end of the nozzle conveyor line (8). The cleaning zone is equipped with the SMT pick-and-place machine nozzle cleaning device as described in any one of claims 1-9; return Includes the following steps: S1: Place the pick-and-place nozzle to be cleaned into the tray, and place the tray onto the loading platform (9); S2: The grabbing robot (7) grabs the pick-and-place machine nozzle in the tray and identifies the type; controls the station switching motor (5) to rotate and selects the corresponding brush head to be vertically downward; S3: The gripping robot (7) moves the gripped pick-and-place machine nozzle to the primary cleaning area and places the pick-and-place machine nozzle to be cleaned directly below the brush head of the work station. S4: Control the lifting telescopic cylinder (2) to extend downwards, so that the brush head of the working station is inserted into the nozzle of the pick-and-place machine to be cleaned; control the drive motor (4) to run, so that the brush head of the working station can clean the nozzle of the pick-and-place machine to be cleaned. S5: The cleaned pick-and-place nozzle is returned to the tray by the cleaning gripping robot (7); S6: Repeat S3-S5 until all pick-and-place nozzles on the tray have been cleaned; S7: The gripping robot (7) grips the tray and places it in the secondary cleaning area for ultrasonic cleaning; S8: After ultrasonic cleaning is completed, the gripping robot (7) places the tray on the nozzle conveyor line (8); S9: Control the nozzle conveyor line (8) to convey the tray. After the tray is conveyed to the end of the nozzle conveyor line (8), it is unloaded from the unloading platform (10).

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