A displacement-proof patching device for SMT patching machine

Abstract

The application discloses a kind of displacement-resistant patch devices for SMT chip mounter, specifically relates to SMT chip mounter technical field, including conveying belt, fixedly installed in the top surface of conveying belt chip mounter, fixedly installed in the operation panel of chip mounter front, two front and rear symmetrical clamps in the upper of conveying belt.It is synchronous translation by motor drive double-end threaded rod to drive both sides slider and clamp through displacement-resistant component, cooperate with the guidance of first slide rod, let clamp be stable to the patch and draw close, realize the close gapless clamping of patch front and rear side, eliminate horizontal direction displacement;Clamping simultaneously, patch extrusion push plate triggers gas transmission structure, promotes second slide rod and drives pressure plate to descend, so that rubber plate forms flexible extrusion to patch top surface, spring can be adapted to different thickness patch, realize non-injury pressure solid, form the double fixing effect of front and rear clamping+top surface pressure solid, avoid patch to appear deviation, warping etc. in the process of mounting, guarantee mounting precision.

Description

Technical Field

[0001] This invention relates to the field of SMT pick and place machine technology, and in particular to an anti-displacement pick and place device for SMT pick and place machines. Background Technology

[0002] SMT (Surface Mount Technology) pick-and-place machines are used to directly mount electronic components onto the surface of printed circuit boards (PCBs), and are the core equipment in surface mount technology (SMT) production lines. The mounting accuracy of an SMT pick-and-place machine directly determines the production quality and performance of electronic circuit boards, and the positioning and fixing effect of the components during the mounting process is a key factor affecting the mounting accuracy.

[0003] Existing SMT pick-and-place machines generally employ simple conveyor positioning structures, relying solely on conveyor belt limits or a single side contact method to fix the components. They lack specific anti-displacement designs, leading to numerous problems during actual placement. Firstly, existing devices can only achieve coarse unidirectional positioning, failing to provide multi-dimensional fixation. Components are prone to horizontal shifting (left / right, front / back), causing component placement misalignment and reducing PCB yield. Secondly, existing devices lack a top-surface clamping structure, making components susceptible to lifting or edge curling due to the machine's operating force. This not only affects placement accuracy but can also lead to loose component placement, subsequent detachment, and poor contact. Therefore, this paper proposes an anti-displacement placement device for SMT pick-and-place machines. Summary of the Invention

[0004] The main objective of this invention is to provide an anti-displacement placement device for SMT pick and place machines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An anti-displacement placement device for an SMT pick-and-place machine includes a conveyor belt, a pick-and-place machine fixedly mounted on the top surface of the conveyor belt, an operation panel fixedly mounted on the front of the pick-and-place machine, two symmetrical clamping plates located above the conveyor belt, a positioning plate located between the two clamping plates, an anti-displacement component disposed above the two clamping plates, the two clamping plates being connected to the pick-and-place machine via the anti-displacement component and used to adjust the distance between the two clamping plates to prevent placement displacement; a positioning component disposed above the positioning plate, the height of the positioning plate being adjusted via the positioning component.

[0006] Preferably, the anti-displacement component includes a motor fixedly connected to the front of the pick-and-place machine, a double-threaded rod located inside the pick-and-place machine, and two symmetrically arranged sliders. The rear end face of the motor output rod penetrates the front of the pick-and-place machine and extends to the inside of the pick-and-place machine, and is fixedly connected to the front end face of the double-threaded rod. The rear end face of the double-threaded rod is threaded through the front side of the two sliders and extends to the rear side of the two sliders. The two sliders are fixedly connected to the adjacent surfaces of two clamping plates, and the bottom surfaces of the two clamping plates are in contact with the top surface of the conveyor belt.

[0007] Preferably, a sliding cylinder is fixedly connected to the adjacent surfaces of the two clamping plates. A second piston and a second sliding rod are disposed inside the sliding cylinder. The bottom surface of the second piston is fixedly connected to the top surface of the second sliding rod. The bottom end surface of the second sliding rod slides through the bottom surface of the sliding cylinder and extends to the bottom of the sliding cylinder. A support plate is fixedly connected to the bottom end surface of the second sliding rod. A slot is formed through the side of the clamping plate away from the slider. A push plate is slidably disposed inside the slot. A connecting rod is fixedly connected to the rear side of the push plate. A cavity is formed inside the clamping plate. An adjusting plate and a first piston are disposed inside the cavity. The rear end surface of the connecting rod slides through the side surface of the slot and extends into the cavity, and is fixedly connected to the front side of the adjusting plate. An adjusting rod is disposed between the adjusting plate and the first piston. The upper and lower end surfaces of the adjusting rod are hinged to the bottom surface of the first piston and the top surface of the adjusting plate, respectively. A connecting pipe is disposed above the first piston. The end surface of the connecting pipe is fixedly connected through the top surface of the cavity and the top surface of the sliding cylinder and extends into the sliding cylinder.

[0008] Preferably, a pressure plate is provided below the support plate, and a spring is provided between the support plate and the pressure plate, with the two ends of the spring being fixedly connected to the bottom surface of the support plate and the top surface of the pressure plate, respectively.

[0009] Preferably, a rubber plate is fixedly connected to the bottom surface of the pressure plate.

[0010] Preferably, the side of the first piston is in contact with the inner side of the cavity, and the side of the second piston is in contact with the inner side of the slide.

[0011] Preferably, the two clamping plates are fixedly connected to the first sliding rod on the side near the slider, and the end faces of the first sliding rod on the front and rear sides slide through the front and rear sides of the placement machine and extend to the front and rear sides of the placement machine, respectively.

[0012] Preferably, the positioning component includes an electric push rod fixedly connected to the left side of the pick-and-place machine, the bottom end of the output rod of the electric push rod being fixedly connected to the top surface of the positioning plate, and the positioning plate being located in the middle of the two clamping plates.

[0013] Preferably, the electric push rod is provided with a connecting plate and a third slide rod on both the front and rear sides. The right side of the connecting plate is fixedly connected to the left side of the placement machine. The bottom end of the third slide rod slides through the top surface of the connecting plate and extends to the bottom of the connecting plate, and is fixedly connected to the top surface of the positioning plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The anti-displacement component utilizes a motor-driven double-ended threaded rod to synchronously move the sliders on both sides and the clamping plate. Combined with the guidance of the first sliding rod, the clamping plate smoothly approaches the patch, achieving tight, gapless clamping of the patch from the front and back, preventing horizontal displacement. Simultaneously, the patch pressing push plate triggers a gas transmission structure, pushing the second sliding rod to move the pressure plate downward, causing the rubber plate to flexibly compress the top surface of the patch. The spring can adapt to patches of different thicknesses, achieving damage-free pressing and forming a dual fixing effect of front and rear clamping + top surface pressing. This comprehensively prevents problems such as patch misalignment and lifting during the placement process, ensuring placement accuracy.

[0015] The positioning component uses an electric push rod to drive the positioning plate to rise and fall vertically. Combined with the guide limit of the connecting plate and the third slide rod, the lifting and lowering process of the positioning plate is smooth and without deviation or jamming. It can quickly contact the patch and complete the initial position definition, laying a precise benchmark for the subsequent clamping and fixing of the patch. This effectively avoids the placement error caused by the initial position deviation and ensures the accuracy and consistency of subsequent placement operations. Attached Figure Description

[0016] Figure 1 This is a perspective view of the overall front view of the present invention; Figure 2 This is a left-side perspective view of the present invention; Figure 3 This is a left-side perspective view of the spring of the present invention; Figure 4 This is a right perspective view of the double-threaded rod of the present invention; Figure 5 This is a perspective cross-sectional view of the left side of the connecting pipe of the present invention; Figure 6 This is a left perspective view of the third slider of the present invention.

[0017] In the diagram: 1. Conveyor belt; 2. Positioning plate; 3. Pick and place machine; 4. Operation panel; 5. Clamping plate; 60. Anti-displacement component; 601. Motor; 602. Double-ended threaded rod; 603. Slider; 604. First slide rod; 605. Push plate; 606. Connecting rod; 607. Adjusting plate; 608. First piston; 609. Adjusting rod; 6010. Slide cylinder; 6011. Connecting pipe; 6012. Second piston; 6013. Second slide rod; 6014. Support plate; 6015. Pressure plate; 6016. Spring; 6017. Rubber plate; 61. Positioning component; 611. Electric push rod; 612. Connecting plate; 613. Third slide rod. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] As the core equipment for electronic component placement, the placement accuracy of SMT placement machines directly determines the production quality and performance of electronic circuit boards. The positioning and fixing effect of the placement components during the placement process is a key factor affecting the placement accuracy.

[0020] Example 1: Please refer to Figure 1 - Figure 5 This invention provides a technical solution: an anti-displacement placement device for an SMT pick and place machine, comprising a conveyor belt 1, a pick and place machine 3 fixedly installed on the top surface of the conveyor belt 1, an operation panel 4 fixedly installed on the front of the pick and place machine 3, two symmetrical clamping plates 5 located above the conveyor belt 1, a positioning plate 2 located between the two clamping plates 5, an anti-displacement component 60 disposed above the two clamping plates 5, the two clamping plates 5 being connected to the pick and place machine 3 through the anti-displacement component 60 and used to adjust the distance between the two clamping plates 5 to prevent placement displacement; a positioning component 61 disposed above the positioning plate 2, the height of the positioning plate 2 being adjusted through the positioning component 61.

[0021] The anti-displacement assembly 60 includes a motor 601 fixedly connected to the front of the pick-and-place machine 3, a double-threaded rod 602 located inside the pick-and-place machine 3, and two symmetrically arranged sliders 603. The rear end face of the output rod of the motor 601 passes through the front of the pick-and-place machine 3 and extends to the inside of the pick-and-place machine 3, and is fixedly connected to the front end face of the double-threaded rod 602. The rear end face of the double-threaded rod 602 is threaded through the front side of the two sliders 603 and extends to the rear side of the two sliders 603. The two sliders 603 are fixedly connected to the adjacent surfaces of the two clamping plates 5, and the bottom surfaces of the two clamping plates 5 are in contact with the top surface of the conveyor belt 1.

[0022] Two clamping plates 5 are fixedly connected to adjacent surfaces of sliding cylinders 6010. Inside each sliding cylinder 6010 is a second piston 6012 and a second sliding rod 6013. The bottom surface of the second piston 6012 is fixedly connected to the top surface of the second sliding rod 6013. The bottom surface of the second sliding rod 6013 slides through the bottom surface of the sliding cylinder 6010 and extends below it. A support plate 6014 is fixedly connected to the bottom surface of the second sliding rod 6013. A slot is formed on the side of the clamping plate 5 away from the slider 603. A push plate 605 is slidably disposed inside the slot. A connecting rod 606 is fixedly connected to the rear side of the push plate 605. The plate 5 has a cavity inside, and an adjusting plate 607 and a first piston 608 are arranged inside the cavity. The rear end face of the connecting rod 606 slides through the inner side of the cavity and extends into the cavity, and is fixedly connected to the front side of the adjusting plate 607. An adjusting rod 609 is arranged between the adjusting plate 607 and the first piston 608. The upper and lower end faces of the adjusting rod 609 are respectively hinged to the bottom surface of the first piston 608 and the top surface of the adjusting plate 607. A connecting pipe 6011 is arranged above the first piston 608. The end face of the connecting pipe 6011 is fixedly inserted through the top surface of the cavity and the top surface of the slide cylinder 6010 and extends into the interior of the slide cylinder 6010.

[0023] A pressure plate 6015 is provided below the support plate 6014, and a spring 6016 is provided between the support plate 6014 and the pressure plate 6015. The two ends of the spring 6016 are fixedly connected to the bottom surface of the support plate 6014 and the top surface of the pressure plate 6015, respectively. The elastic force of the spring 6016 can be adapted to patches of different thicknesses to achieve flexible pressing.

[0024] A rubber plate 6017 is fixedly connected to the bottom of the pressure plate 6015. The rubber plate 6017 prevents the pressure plate 6015 from damaging the surface of the patch.

[0025] The side of the first piston 608 is in contact with the inner side of the cavity, and the side of the second piston 6012 is in contact with the inner side of the slide 6010.

[0026] Both clamping plates 5 are fixedly connected to the side of the slider 603 with a first slide rod 604. The end faces of the first slide rod 604 on the front and rear sides slide through the front and rear sides of the pick and place machine 3 and extend to the front and rear sides of the pick and place machine 3 respectively. The first slide rod 604 guides the movement of the clamping plates 5.

[0027] Through the anti-displacement component 60, the motor 601 drives the double-headed threaded rod 602 to move the sliders 603 on both sides and the clamping plate 5 synchronously. With the guidance of the first slide rod 604, the clamping plate 5 moves smoothly towards the patch, achieving tight and gapless clamping of the patch from the front and back, and preventing horizontal displacement. At the same time, the patch pressing push plate 605 triggers the gas transmission structure, pushing the second slide rod 6013 to move the pressure plate 6015 down, so that the rubber plate 6017 forms a flexible compression on the top surface of the patch. The spring 6016 can adapt to patches of different thicknesses to achieve non-damaging compression, forming a dual fixing effect of front and rear clamping + top surface compression, which comprehensively avoids problems such as patch displacement and lifting during the installation process, and ensures installation accuracy.

[0028] Example 2: Based on Example 1, a preferred embodiment of the anti-displacement placement device for an SMT pick-and-place machine provided by the present invention is as follows: Figure 2 and Figure 6 As shown: The positioning component 61 includes an electric push rod 611 fixedly connected to the left side of the pick and place machine 3. The bottom end of the output rod of the electric push rod 611 is fixedly connected to the top surface of the positioning plate 2. The positioning plate 2 is located in the middle of the two clamping plates 5.

[0029] The electric push rod 611 is provided with a connecting plate 612 and a third slide rod 613 on both the front and rear sides. The right side of the connecting plate 612 is fixedly connected to the left side of the pick and place machine 3. The bottom end of the third slide rod 613 slides through the top surface of the connecting plate 612 and extends to the bottom of the connecting plate 612, and is fixedly connected to the top surface of the positioning plate 2. The third slide rod 613 plays a guiding role for the positioning plate 2.

[0030] The positioning plate 2 is driven to rise and fall vertically by the positioning component 61 and the electric push rod 611. With the guide and limit of the connecting plate 612 and the third slide rod 613, the positioning plate 2 can rise and fall smoothly without deviation or jamming. It can quickly contact the patch and complete the initial position limit, laying a precise benchmark for the subsequent clamping and fixing of the patch. This effectively avoids the placement error caused by the initial position deviation and ensures the accuracy and consistency of subsequent placement operations.

[0031] In this application, the internal volume ratio of the cavity to the internal volume of the slide 6010 is 2:1, ensuring that the movement of the first piston 608 can effectively push the second piston 6012 to achieve a downward stroke. The connecting pipe 6011 adopts a rigid gas guide pipe with a diameter of 3mm to ensure timely gas transmission without delayed pressure relief. The spring 6016 adopts a stainless steel compression spring with a wire diameter of 0.8mm, an outer diameter of 8mm, and a free height of 20mm, with an elastic coefficient of 1.2N / mm, which can achieve flexible compression of the 0.23mm thick patch. The compression force can be controlled at 515N to avoid damaging the patch.

[0032] It should be noted that the specific installation methods, circuit connection methods, and control methods of the motor, electric actuator, and chip mounter used in this invention are all conventional designs, and will not be described in detail here.

[0033] The working principle of this invention is as follows: The patch is placed on the conveyor belt 1 for conveying. The electric push rod 611 is turned on, and its output rod drives the positioning plate 2 to move downward. When the positioning plate 2 moves, it drives the third slide rods 613 on both sides to slide on the connecting plate 612 to ensure that the positioning plate 2 rises and falls vertically. When the patch contacts the right side of the positioning plate 2, the conveyor belt 1 stops running, and the initial position of the patch is defined. After the chip is positioned, the motor 601 is turned on. The output rod of the motor 601 drives the double-headed threaded rod 602 to rotate. The double-headed threaded rod 602 drives the two sliders 603 to move closer to each other. The sliders 603 synchronously drive the two clamping plates 5 to move towards the chip. When the clamping plate 5 moves, the first slide rod 604 on one side slides inside the chip mounter 3 to ensure the stability of the translation of the clamping plate 5 until the push plate 605 on the clamping plate 5 contacts the chip. The clamping plate 5 continues to move toward the patch, and the patch pressing push plate 605 slides into the cavity of the clamping plate 5. The push plate 605 drives the connecting rod 606 to move synchronously. The connecting rod 606 drives the adjusting plate 607 in the cavity of the clamping plate 5 to move. The adjusting plate 607 pushes the first piston 608 to move upward through the hinged adjusting rod 609. The first piston 608 presses against the inner side wall of the cavity and compresses the gas in the cavity when it moves upward. The gas is transported to the inside of the slide cylinder 6010 on the clamping plate 5 through the connecting pipe 6011. After the gas enters the slide cylinder 6010, it pushes the second piston 6012, which is in contact with the inner wall of the slide cylinder 6010, to move downward. The second piston 6012 drives the second slide rod 6013 to descend vertically, which in turn pushes the support plate 6014 downward. The support plate 6014 drives the pressure plate 6015 to move downward through the spring 6016, and the rubber plate 6017 on the bottom surface of the pressure plate 6015 moves downward accordingly. When the push plate 605 slides completely into the slot of the clamping plate 5, the clamping plates 5 on both sides complete the clamping and fixing of the front and rear sides of the patch; at this time, the rubber plate 6017 just contacts the top surface of the patch and forms a compression, and the elastic force of the spring 6016 can be adapted to patches of different thicknesses to achieve flexible pressing. At this point, the clamping of the front and rear sides and the pressing of the top surface of the patch are all completed, and the patcher 3 can perform patch placement operations, effectively preventing patch displacement. After the placement machine 3 completes the placement, the operation panel 4 controls the motor 601 to reverse and drive the clamping plate 5 to reset. At the same time, the gas in the cavity flows back, the second piston 6012 moves up and drives the pressure plate 6015 to disengage from the placement. The electric push rod 611 drives the positioning plate 2 to move up, and the conveyor belt 1 automatically starts to transport the placed placement to the next process, realizing automated continuous operation.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A non-displacement placement device for an SMT pick and place machine, comprising a conveyor belt 1, a pick and place machine 3 fixedly mounted on the top surface of the conveyor belt 1, an operation panel 4 fixedly mounted on the front of the pick and place machine 3, two symmetrical clamping plates 5 located above the conveyor belt 1, and a positioning plate 2 located between the two clamping plates 5, characterized in that: An anti-displacement component 60 is provided above the two clamping plates 5. The two clamping plates 5 are connected to the pick and place machine 3 through the anti-displacement component 60 and are used to adjust the distance between the two clamping plates 5 to prevent the pick and place machine from shifting. A positioning component 61 is provided above the positioning plate 2. The height of the positioning plate 2 is adjusted through the positioning component 61.

2. The anti-displacement placement device for an SMT placement machine according to claim 1, characterized in that: The anti-displacement component 60 includes a motor 601 fixedly connected to the front of the pick-and-place machine 3, a double-threaded rod 602 located inside the pick-and-place machine 3, and two symmetrically arranged sliders 603. The rear end face of the output rod of the motor 601 penetrates the front of the pick-and-place machine 3 and extends to the inside of the pick-and-place machine 3, and is fixedly connected to the front end face of the double-threaded rod 602. The rear end face of the double-threaded rod 602 is threaded through the front side of the two sliders 603 and extends to the rear side of the two sliders 603. The two sliders 603 are fixedly connected to the adjacent surfaces of the two clamping plates 5, and the bottom surfaces of the two clamping plates 5 are in contact with the top surface of the conveyor belt 1.

3. The anti-displacement placement device for an SMT pick-and-place machine according to claim 2, characterized in that: Two clamping plates 5 are each fixedly connected to a sliding cylinder 6010 on their adjacent surfaces. A second piston 6012 and a second sliding rod 6013 are disposed inside the sliding cylinder 6010. The bottom surface of the second piston 6012 is fixedly connected to the top surface of the second sliding rod 6013. The bottom surface of the second sliding rod 6013 slides through the bottom surface of the sliding cylinder 6010 and extends below the sliding cylinder 6010. A support plate 6014 is fixedly connected to the bottom surface of the second sliding rod 6013. A slot is formed on the side of the clamping plate 5 away from the slider 603. A push plate 605 is slidably disposed inside the slot. A connecting rod 606 is fixedly connected to the rear side of the push plate 605. The clamping plate 5 has a cavity inside, and an adjusting plate 607 and a first piston 608 are arranged inside the cavity. The rear end face of the connecting rod 606 slides through the inner side of the slot and extends into the cavity, and is fixedly connected to the front side of the adjusting plate 607. An adjusting rod 609 is arranged between the adjusting plate 607 and the first piston 608. The upper and lower end faces of the adjusting rod 609 are respectively hinged to the bottom surface of the first piston 608 and the top surface of the adjusting plate 607. A connecting pipe 6011 is arranged above the first piston 608. The end face of the connecting pipe 6011 is fixedly inserted through the top surface of the cavity and the top surface of the slide cylinder 6010 and extends into the interior of the slide cylinder 6010.

4. The anti-displacement placement device for an SMT pick-and-place machine according to claim 3, characterized in that: A pressure plate 6015 is provided below the support plate 6014, and a spring 6016 is provided between the support plate 6014 and the pressure plate 6015. The two ends of the spring 6016 are fixedly connected to the bottom surface of the support plate 6014 and the top surface of the pressure plate 6015, respectively.

5. The anti-displacement placement device for an SMT pick-and-place machine according to claim 4, characterized in that: A rubber plate 6017 is fixedly connected to the bottom surface of the pressure plate 6015.

6. The anti-displacement placement device for an SMT pick-and-place machine according to claim 3, characterized in that: The side of the first piston 608 is in contact with the inner side of the cavity, and the side of the second piston 6012 is in contact with the inner side of the slide 6010.

7. The anti-displacement placement device for an SMT pick-and-place machine according to claim 2, characterized in that: Both clamping plates 5 are fixedly connected to the side of the slider 603 with a first sliding rod 604. The end faces of the first sliding rod 604 on the front and rear sides slide through the front and rear sides of the pick and place machine 3 and extend to the front and rear sides of the pick and place machine 3, respectively.

8. The anti-displacement placement device for an SMT pick-and-place machine according to claim 1, characterized in that: The positioning component 61 includes an electric push rod 611 fixedly connected to the left side of the pick and place machine 3. The bottom end of the output rod of the electric push rod 611 is fixedly connected to the top surface of the positioning plate 2. The positioning plate 2 is located in the middle of the two clamping plates 5.

9. A device for preventing displacement of components in an SMT pick-and-place machine according to claim 8, characterized in that: The electric push rod 611 is provided with a connecting plate 612 and a third slide rod 613 on both the front and rear sides. The right side of the connecting plate 612 is fixedly connected to the left side of the placement machine 3. The bottom end of the third slide rod 613 slides through the top surface of the connecting plate 612 and extends to the bottom of the connecting plate 612, and is fixedly connected to the top surface of the positioning plate 2.

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