Positioning anti-deviating mounting assembly and method for SMT mounting machine production line

Abstract

The present invention proposes a positioning anti-deviating mounting assembly and method for an SMT placement machine production line, and relates to the field of patch processing technology. The present invention includes a carrier, a mounting mechanism is arranged on the carrier, and the two ends of the carrier are respectively a feeding end and a blanking end, and also includes: two storage racks, which are respectively detachably positioned and connected to the feeding end and the blanking end of the carrier, and the storage racks are provided with a plurality of conveying fixtures. The loading and unloading work of the proposed patch device does not require the intervention of a manipulator, and does not require manual circuit board turnover processing. The fixed-point loading and unloading of the circuit board are completed by relying on the linkage of the mechanical structure, and the circuit board on the positioning fixture has been locked in position to avoid the occurrence of deviation, so it is conducive to the entire mounting work, and is applicable to both small-batch circuit board processing and medium-batch circuit board processing, and compared with the loading and unloading of the manipulator, the degree of integration is low and it is easier to debug.

Description

Technical Field

[0001] The invention relates to the technical field of patch processing, and in particular to a positioning anti-deviating patch assembly and method for a SMT patch machine production line. Background Art

[0002] The SMT production line is a new generation of electronic assembly technology developed from hybrid integrated circuit technology. It is characterized by the use of component surface mounting technology and reflow soldering technology, and has become a new generation of assembly technology in electronic product manufacturing.

[0003] In the entire mounting process, the blank PCB is loaded into the mounting machine, and the pinless or short-lead surface assembly components are mounted on the surface of the printed circuit board or other substrates through the mounting mechanism, and then soldered and assembled through reflow soldering or dip soldering. The circuit boards after mounting are loaded and unloaded from the mounting machine.

[0004] At present, the loading and unloading of PCB boards in the production line are mainly carried out through the cooperation of the manipulator and the material cart. The material cart with empty PCB boards is moved to the loading place of the placement machine, and the manipulator is used to take out the empty PCB boards on the material cart one by one and place them on the fixture of the placement mechanism. Then, the fixture carries the empty PCB boards into the placement area to complete the placement, and moves the circuit board to the unloading place with the movement of the fixture. At this time, the manipulator is used to take down the circuit board and put it on the empty material cart again. In the whole process, at least two manipulators are required to cooperate with each other, and the When a PCB board is taken off a material cart and placed on a fixture, or taken off a fixture and placed on a material cart, it needs to be constantly positioned to avoid positioning failure caused by offset. Therefore, the entire link has a high degree of integration, high precision requirements, and low fault tolerance. For some circuit boards with small production volumes and low shipments, this loading and unloading method does not conform to the economic concept. Therefore, manual loading and unloading is used. However, manual loading and unloading has large errors and requires constant fixing and releasing. In view of this, the present application proposes a positioning and anti-offset mounting component and method for an SMT placement machine production line. Summary of the invention

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] The positioning and anti-deviating mounting assembly for SMT placement machine production line comprises a carrier frame, the carrier frame is provided with a mounting mechanism, the two ends of the carrier frame are respectively a feeding end and a blanking end, and also comprises: two storage racks, which are respectively detachably positioned and connected to the feeding end and the blanking end of the carrier frame, the storage rack is provided with a plurality of conveying fixtures, the circuit board is restricted in the conveying fixtures, and the plurality of conveying fixtures are moved in a circular cycle on the storage rack, wherein the storage rack is provided with a conveying station, and the conveying fixture is connected to the feeding end or the blanking end through the conveying station. Material end alignment; a conveying mechanism, which is installed on the carrier frame, wherein a positioning fixture is configured on the conveying mechanism, the positioning fixture is used to carry the circuit board and position the circuit board on the positioning fixture, wherein the conveying mechanism is used to drive the positioning fixture to continuously reciprocate between the feeding end and the blanking end, and the positioning fixture and the conveying fixture complete the circuit board transfer at the conveying station, when the positioning fixture is at the feeding end, the circuit board is transferred from the conveying fixture to the positioning fixture, and when the positioning fixture is at the blanking end, the circuit board is transferred from the positioning fixture to the conveying fixture.

[0007] Furthermore, the conveying fixture includes two side plates distributed at intervals, and the opposite sides of the two side plates are constructed with accommodating notches. The circuit board is located between the two side plates and inserted into the two accommodating notches. A shield is slidably mounted on the two side plates, and the shield encloses and covers the open ends of the two accommodating notches to limit the movement of the circuit board. A spring is connected between the shield and the side plate.

[0008] Furthermore, the storage rack includes a frame, in which two main rods distributed in parallel up and down are rotatably connected, two sprockets are installed on the main rods, and a chain is meshed and connected between two adjacent sprockets up and down. A guide rail located in the enclosed area between the four sprockets is installed on the frame, and a connecting rod and a guide wheel are rotatably installed on the side plate, the end of the connecting rod is rotatably connected to the chain link, and the guide wheel is rollingly installed in the guide rail.

[0009] Furthermore, a linkage plate located between two side plates is installed on the shield plate, a bevel groove is constructed on one side of the linkage plate, and a clearance hole connected to the bevel groove is constructed on the other side of the linkage plate. The positioning fixture includes two horizontally spaced base plates, at least two suction cups are installed on the base plates, and the two base plates are connected by a support plate, and the support plate is connected to a straight rod through a rotating part, and the straight rod is connected to a conveying mechanism, and both ends of the straight rod are constructed with bevels, and the ends of the straight rod can be inserted into the bevel groove and extended through the clearance hole.

[0010] Furthermore, the rotating part includes a locking groove constructed on the straight rod, the support plate is rotatably connected to the straight rod, a locking rod is connected to the support plate through a spring, the locking rod and the support plate are slidingly matched, the end of the locking rod has two inner inclined surfaces, and two outer inclined surfaces are constructed in the locking groove, and a positioning telescopic rod is installed on the support frame.

[0011] Furthermore, the conveying mechanism includes two transmission rollers rotatably mounted on a carrier frame, transmission sleeves on the two transmission rollers are provided with conveyor belts, the straight rods are mounted on the conveyor belts, and a reduction motor connected to one of the transmission rollers is mounted on the carrier frame.

[0012] Furthermore, a first linkage wheel is installed on the transmission roller connected to the reduction motor, a linkage shaft is rotatably installed in the middle of the carrier frame, both ends of the linkage shaft are connected to the second linkage wheel through a one-way bearing, one end of the linkage shaft is connected to the third linkage wheel, the first linkage wheel and the third linkage wheel are connected through a first linkage belt transmission, fourth linkage wheels are installed on both sides of the carrier frame and at the positioning corners through brackets, the second linkage wheel is connected to the adjacent fourth linkage wheel on the same side through a second linkage belt transmission, the fourth linkage wheel is detachably connected to the main rod located at the bottom of the adjacent frame, and when the transmission roller rotates forward or reversely, it can only drive one of the fourth linkage wheels to rotate, and the positioning fixture also includes a driving mechanism, which drives the straight rod to perform linear reciprocating motion through the driving mechanism.

[0013] Furthermore, the fourth linkage wheel includes a support shaft rotatably connected to the bracket, a center block is installed on the end of the support shaft, at least three positioning frames distributed in a circular array along the axis of the center block are installed on the center block, an adjusting screw is installed through the positioning frame, and two locking nuts are sleeved on the adjusting screw, which are respectively located on both sides of the position where the positioning frame is penetrated by the adjusting screw, the end of the adjusting screw located outside the positioning frame is connected to an arc block, the outer contours of the multiple arc blocks can be enclosed to form a circle, and the second linkage belt is sleeved on the outside of the multiple arc blocks.

[0014] Furthermore, two guide grooves distributed in opposite positions are constructed on the carrier frame, a mounting plate is installed on the conveyor belt, rollers are installed on both sides of the mounting plate, the rollers are in rolling cooperation with the guide grooves, the driving mechanism includes a cylinder push rod and a positioning rack installed on the mounting plate, the piston end of the cylinder push rod is connected to a mounting frame, a transmission gear is rotatably installed on the mounting frame, the straight rod is constructed with teeth meshing with the transmission gear, and the straight rod is in sliding cooperation with the positioning rack.

[0015] The present invention also proposes a positioning and anti-deviating mounting method for an SMT placement machine production line, using the positioning and anti-deviating mounting component for an SMT placement machine production line, comprising the following steps:

[0016] Move the two material storage racks to the feeding end and the blanking end of the carrier frame respectively, lock the positions of the material storage racks, and connect the supporting shaft to the main rod, with the positioning fixture at the feeding end;

[0017] The positioning fixture works to transfer the circuit board from the conveying fixture to the positioning fixture, and the reduction motor is started to drive the conveying mechanism to work, and the positioning fixture moves from the feeding end to the blanking end;

[0018] The positioning fixture moves with the conveying mechanism to the placement mechanism station to complete the placement action;

[0019] The positioning fixture moves with the conveying mechanism to the material storage rack at the blanking end, and the positioning fixture works to transfer the circuit board from the positioning fixture to the conveying fixture.

[0020] The beneficial effects of the present invention are as follows:

[0021] Compared with the prior art, the loading and unloading work of the patch device proposed in the present application does not require the intervention of a robot, nor does it require manual circuit board turnover processing. It relies on the linkage of a mechanical structure to complete the fixed-point loading and unloading of circuit boards, and the circuit boards on the positioning fixtures have been locked in position to avoid offset. This is beneficial to the entire mounting work and is suitable for both small-batch and medium-batch circuit board processing. Compared with robot loading and unloading, it has a low degree of integration, is easier to debug, and improves the fault tolerance of the device. Compared with manual loading and unloading, it improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 The present invention Figure 1 Schematic diagram from another perspective;

[0024] Figure 3 The present invention Figure 2 A magnified view of the structure at center;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the material storage rack of the present invention;

[0026] Figure 5 The present invention Figure 4 A magnified view of the structure at B in the middle;

[0027] Figure 6 It is another three-dimensional structural schematic diagram of the material storage rack of the present invention;

[0028] Figure 7 The present invention Figure 6 A magnified view of the structure at C in the middle;

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the conveying fixture of the present invention when clamping a circuit board;

[0030] Fig. 9It is a schematic diagram of the three-dimensional structure of the conveying clamp of the present invention when the circuit board is not clamped;

[0031] Fig.10 It is a schematic diagram of the three-dimensional structure of the positioning fixture of the present invention;

[0032] Fig.11 The present invention Fig.10 A plan view of a

[0033] Fig.12 The present invention Fig.11 Cross-sectional view in the middle DD direction;

[0034] Fig.13 The present invention Fig.10 Another perspective of the picture;

[0035] Fig.14 It is a schematic diagram of the three-dimensional structure of the locking rod of the present invention;

[0036] Fig.15 is a schematic diagram of the three-dimensional structure of the fourth linkage wheel of the present invention;

[0037] Figure numerals: 1, carrier; 2, mounting mechanism; 3, storage rack; 301, frame; 302, main rod; 303, sprocket; 304, chain; 305, guide rail; 4, conveying fixture; 401, side plate; 402, accommodating gap; 403, shield plate; 404, edge plate; 405, connecting rod; 406, guide wheel; 407, linkage plate; 408, inclined groove; 409, clearance hole; 5, conveying mechanism; 501, transmission roller; 502, conveyor belt; 503, reduction motor; 6, positioning fixture; 601, substrate; 602, suction cup; 603, support plate; 604, straight rod; 605, driving mechanism; 6051, cylinder push rod ;6052, positioning rack;6053, mounting frame;6054, transmission gear;606, locking slot;607, locking rod;7, guide slot;8, mounting plate;9, roller;10, sliding rod;11, positioning telescopic rod;12, linkage shaft;13, second linkage wheel;14, third linkage wheel;15, first linkage belt;16, bracket;17, fourth linkage wheel;1701, support shaft;1702, center block;1703, positioning frame;1704, adjusting screw;1705, arc block;1706, dial;18, second linkage belt;19, positioning claw;20, first linkage wheel;21, positioning slot;22, positioning rod. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] Combine the following Figure 1-Figure 15The present invention describes a positioning anti-deviating mounting assembly and mounting method for an SMT mounting machine production line according to an embodiment of the present invention. The mounting assembly proposed in the present invention is used to realize automatic loading and unloading of circuit boards and positioning anti-deviating conveying.

[0040] like Figure 1-Figure 2 As shown, one embodiment of the present application proposes a positioning and anti-deviation placement component for an SMT placement machine production line, including a carrier frame 1, on which a placement mechanism 2 is arranged. The placement mechanism 2 is composed of a multi-axis moving mechanism and a placement machine head, and is used to place SMT components on the solder paste brushing position of the circuit board, which is a distinguishing feature of the prior art of the present application. The two ends of the carrier frame 1 are respectively a feeding end and a blanking end.

[0041] The distinguishing technical features of the present application also include: two storage racks 3, which are detachably positioned and connected to the feeding end and the blanking end of the carrier frame 1, respectively; the storage racks 3 are equipped with universal self-locking wheels for moving in the production workshop; when the circuit boards on the storage racks 3 are used or stored, the storage racks 3 are removed and replaced with the next storage rack 3, that is, in the entire production process, the coordinated cooperation of multiple storage racks 3 is required; a plurality of conveying fixtures 4 are arranged on the storage racks 3, and the circuit boards are restricted in the conveying fixtures 4, and the conveying fixtures 4 can fix the circuit boards to ensure the stability of the circuit boards on the storage racks 3; a plurality of conveying fixtures 4 perform circular circulation and turnover movement on the storage racks 3, wherein the storage racks 3 have a feeding station, and the conveying fixtures 4 are aligned with the feeding end or the blanking end through the feeding station, and when the feeding station is at the feeding end, the circuit boards are in the loading action, and when the feeding station is at the blanking end, the circuit boards are in the unloading action.

[0042] The conveying mechanism 5 is installed on the carrier 1. The conveying mechanism 5 is equipped with a positioning fixture 6. The positioning fixture 6 is used to carry the circuit board and position the circuit board on the positioning fixture 6. The conveying mechanism 5 is used to drive the positioning fixture 6 to move back and forth between the feeding end and the blanking end, and the positioning fixture 6 and the conveying fixture 4 complete the circuit board transfer at the feeding station. When the positioning fixture 6 is at the feeding end, the circuit board is transferred from the conveying fixture 4 to the positioning fixture 6. When the positioning fixture 6 is at the blanking end, the circuit board is transferred from the positioning fixture 6 to the conveying fixture 4. The movement path of the positioning fixture 6 is unchanged. It moves back and forth between the feeding end and the blanking end in a linear motion, not a circular motion. The position adjustment of the positioning fixture 6 relative to the mounting mechanism 2 is only a linear adjustment, which meets the positioning requirements and avoids offset. The conveying fixture 4 will be fixed When the circuit board is moved to the feeding station or the circuit board that has been mounted is received at the feeding station, the loading or unloading action is completed at a fixed position, thereby reducing the error in the circuit board transfer process and there is no need to adjust the positioning of the fixed circuit board multiple times. Therefore, compared with the prior art, the loading and unloading work of the patch device proposed in the present application does not require the intervention of a robot, nor does it require manual circuit board turnover processing. The fixed-point loading and unloading of the circuit board are completed by relying on the linkage of the mechanical structure, and the circuit board on the positioning fixture 6 has been locked in position to avoid offset. Therefore, it is beneficial to the entire mounting work and is suitable for both small-batch circuit board processing and medium-batch circuit board processing. Compared with robot loading and unloading, it has a low degree of integration and is easier to debug, which improves the fault tolerance of the device. Compared with manual loading and unloading, it improves work efficiency.

[0043] like Figure 8 and Fig. 9 As shown, the partial structure of the conveying fixture 4 of the present application is disclosed to realize the clamping and fixing function of the conveying fixture 4 on the circuit board. Specifically, the conveying fixture 4 includes two side plates 401 distributed at intervals. The two side plates 401 are both configured with accommodating notches 402 on opposite sides. The two side plates 401 themselves are not directly connected. Fig. 9 As shown, the circuit board is located between the two side plates 401 and inserted into the two receiving notches 402. The state of the circuit board being fixed by the conveying fixture 4 is shown in FIG. Figure 8 As shown, shield plates 403 are slidably mounted on the two side plates 401, and the shield plates 403 indirectly connect the two side plates 401, so that the two side plates 401 can be regarded as a whole, and the area between the two side plates 401 is for the positioning fixture 6 to pass through, so as to facilitate the transfer of the circuit board from the conveying fixture 4 to the positioning fixture 6, or the transfer of the circuit board on the positioning fixture 6 to the conveying fixture 4. The shield plate 403 encloses and covers the open ends of the two accommodating notches 402 to limit the movement of the circuit board. A spring is connected between the shield plate 403 and the side plates 401. Figure 8 and Fig. 9 It can be seen that the end of the side panel 401 has an edge plate 404 in contact with the baffle 403. The purpose of the edge plate 404 is to limit the excessive movement of the baffle 403. Since the baffle 403 blocks the entire accommodating gap 402, the circuit board in the middle is restricted on all sides. Therefore, the stability of the circuit board can be guaranteed during the operation of the storage rack 3.

[0044] like Figure 4-Figure 6 , Figure 8-Figure 9 As shown, the specific structure of the material storage rack 3 and the partial structure of the conveying fixture 4 of the present application are disclosed, so as to realize the smooth circulation movement of the conveying fixture 4 on the material storage rack 3, thereby reaching the material feeding station. The specific material storage rack 3 includes a frame 301, and two main rods 302 distributed in parallel and arranged vertically are rotatably connected in the frame 301. Two sprocket wheels 303 are installed on the main rods 302, and a chain 304 is meshed and connected between two adjacent sprocket wheels 303. A guide rail 305 located in the enclosed area between the four sprocket wheels 303 is installed on the frame 301, and a guide rail 305 located in the enclosed area between the four sprocket wheels 303 is installed on the side plate 401. A connecting rod 405 and a guide wheel 406 are installed. The end of the connecting rod 405 is rotatably connected to the chain link 304. The guide wheel 406 is rollingly installed in the guide rail 305. There are two chains 304 in total, and a guide wheel 406 and a connecting rod 405 are provided on a side plate 401. The two side plates 401 are connected by a shield plate 403 to form a whole. Then, when the two main rods 302 rotate, the two chains 304 move synchronously. The purpose of the connecting rod 405 is to support and maintain the balance of the entire conveying fixture 4. The connecting rod 405 After being connected to the chain 304, the center of gravity is used to maintain the balance of the conveying fixture 4 on the chain 304, especially in the arc segment, where the guide rail 305 is not a complete segment, but exists in the vertical segment of the entire chain 304 motion trajectory. Because the chain 304 moves in a circular motion, the conveying fixture 4 in the arc segment also needs to be adjusted synchronously. In order to ensure the stability of the position of the conveying fixture 4 in the feeding station, the guide rail 305 and the guide wheel 406 are added. When the guide wheel 406 enters the guide rail 305, its position is restricted. The conveying fixture 4 can only move in a straight line as a whole, so that stable conveying of the circuit board can be achieved. The structure in this embodiment is designed to be used in conjunction with the positioning fixture 6 described below; positioning claws 19 are installed at the feeding end and the blanking end of the carrier frame 1. When the storage rack 3 contacts the positioning claws 19, the alignment contact is completed. The purpose of the positioning claws 19 is to complete the docking through friction. The main purpose is to achieve the alignment purpose and ensure the position of the feeding station. The storage rack 3 is provided with a universal self-locking wheel, which can prevent the storage rack 3 from moving.

[0045] like Figure 8-Figure 10As shown, the specific structure of the positioning fixture 6 of the present application and the entire structure of the conveying fixture 4 are disclosed. A linkage plate 407 located between the two side plates 401 is installed on the shield plate 403. A bevel groove 408 is constructed on one side of the linkage plate 407, and a clearance hole 409 connected to the bevel groove 408 is constructed on the other side of the linkage plate 407. The positioning fixture 6 includes two horizontally spaced base plates 601, and at least two suction cups 602 are installed on the base plates 601. The two base plates 601 are connected by a support plate 603. The support plate 603 is connected to a straight rod 604 through a rotating member. The straight rod 604 is connected to the conveying mechanism 5. Both ends of the straight rod 604 are constructed with bevels. The ends of the straight rod 604 can be inserted into the bevel groove 408 and extend out through the clearance hole 409. The suction cup 602 is connected to the vacuum equipment in the production workshop, such as a vacuum machine, through a pipeline. The positioning fixture 6 uses vacuum adsorption to fix the circuit board. This fixing method is a common method for fixing the circuit board. The circuit board transfer action between the positioning fixture 6 and the conveying fixture 4 is as follows: the two storage racks 3 are aligned with the carrier rack 1, and the conveying mechanism 5 drives the positioning fixture 6 to move to the feeding end. During the movement, the inclined surface of the end of the straight rod 604 contacts the inclined surface groove 408 of the linkage plate 407, and the height position of the straight rod 604 does not change, while the height position of the linkage plate 407 is reduced, which drives the shield plate 403 to lower its position, thereby exposing the end position of the accommodating notch 402, and as the straight rod 604 continues to move and pass through the gap Hole 409, part of the structure of the substrate 601 is moved to the bottom of the circuit board, and the circuit board is fixed on the substrate 601 by suction cup 602. During the whole process, the height of the shield plate 403 and the linkage plate 407 is lower than the substrate 601, and will not interfere with the movement of the substrate 601. After the circuit board is sucked by the suction cup 602, the conveying mechanism 5 drives the positioning fixture 6 to move toward the mounting mechanism 2, and the straight rod 604 is continuously retreated until it is separated from the linkage plate 407. The shield plate 403 is reset again under the action of the spring, realizing the loading action. Similarly, the circuit board unloading action can be realized, and the design of the rotating member is to rotate the support plate 603 180 degrees relative to the straight rod 604, change the orientation of the two substrates 601, so that the circuit board on the substrate 601 It can be aligned with the conveying fixture 4 on the storage rack 3 at the blanking end to complete the unloading action. During the resetting process of the positioning fixture 6, the substrate 601 is driven to rotate one hundred and eighty degrees again and can be aligned with the conveying fixture 4 on the storage rack 3 at the feeding end. The present application adopts the linkage cooperation between mechanical structures to replace the complex manipulator structure and manual loading and unloading. In the processing of a small number of circuit boards, batch loading and unloading of circuit boards can be realized, and the loading and unloading stations are fixed each time, which reduces the adjustment and reduces the error. The conveying fixture 4 has the same structural design, and the loading and unloading positions of the positioning fixture 6 are fixed. Therefore, the position of the circuit board on the positioning fixture 6 can maintain a stable state, which is beneficial to the patch processing, and has the functions of positioning and anti-drifting.

[0046] like Figure 10-Figure 14 As shown, the specific structure of the rotating member of the present application is disclosed, wherein the rotating member includes a locking groove 606 constructed on the straight rod 604, the support plate 603 is rotatably connected to the straight rod 604, a locking rod 607 is connected to the support plate 603 through a spring, the locking rod 607 is slidably matched with the support plate 603, the end of the locking rod 607 has two inner bevels, and the locking groove 606 has two outer bevels. A positioning telescopic rod 11 is installed on the carrier 1, and the positioning telescopic rod 11 consists of an outer rod, an inner rod inserted in the outer rod, and a spring connecting the inner rod and the outer rod, wherein the end of the inner rod is hemispherical, and the locking rod 607 is normally inserted into the locking groove 606, and the inner bevel and the outer bevel fit together. The specific structure of the locking rod 607 is as follows Fig.14 As shown, due to the position layout of the two storage racks 3, Fig.10 For example, in this state, the substrate 601 can be smoothly inserted into the conveying fixture 4 at the feeding end, but cannot be inserted into the conveying fixture 4 at the blanking end. Therefore, it is necessary to change the angle of the substrate 601 so that the substrate 601 is rotated one hundred and eighty degrees. The specific operation method of the present application is as follows: Under normal circumstances, the locking rod 607 and the locking slot 606 maintain a plug-in relationship, the two are locked, and the substrate 601 remains stable. When the conveying mechanism 5 drives the positioning fixture 6 to cooperate with the conveying fixture 4 at the feeding end to complete the transfer of the circuit board, the positioning fixture 6 is completed through the mounting mechanism 2, and then moves to the blanking end. During the movement, the support plate 603 contacts the positioning telescopic rod 11, wherein the end of the inner rod passes over the axis of the rotation connection point of the support plate 603 and the straight rod 604. Due to the obstruction of the positioning telescopic rod 11, the entire support plate 603 cannot pass through the positioning telescopic rod 11 in a straight line. Under the influence of the resistance force, the support plate 603 will inevitably be driven to rotate at the rotation point with the straight rod 604. 606, and the locking rod 607 is also driven downward by the spring, and the support plate 603 is forced to rotate again during the whole process until the locking rod 607 is inserted into the locking groove 606. At this time, the entire support plate 603 has been rotated 180 degrees, and the angle adjustment of the substrate 601 is completed. Therefore, the angle adjustment of the substrate 601 is completed during the movement of the positioning fixture 6, and the positioning fixture 6 is realized. The orderly loading and unloading of the circuit board by the positioning fixture 6 is realized.

[0047] like Figure 1-Figure 3As shown, the specific structure of the conveying mechanism 5 of the present application is disclosed, wherein the conveying mechanism 5 includes two transmission rollers 501 rotatably mounted on a carrier frame 1, transmission sleeves on the two transmission rollers 501 are provided with a conveyor belt 502, a straight rod 604 is installed on the conveyor belt 502, and a reduction motor 503 connected to one of the transmission rollers 501 is installed on the carrier frame 1. Since the positioning fixture 6 performs a linear reciprocating motion, which is different from the circular rotation of the traditional conveyor belt 502, the transmission roller 501 of the present application continuously reciprocates under the drive of the reduction motor 503, thereby realizing the movement of the conveyor belt 502. In the existing mechanical design, the reciprocating motion structure includes a screw mechanism, a cylinder piston motion, and a crank mechanism, etc., and the present application adopts a transmission belt in order to realize the structural function disclosed below.

[0048] like Figure 1 and Figure 2 As shown, the present application discloses a further technical solution for the movement of the conveying fixture 4 and the positioning fixture 6. A first linkage wheel 20 is installed on the transmission roller 501 connected to the reduction motor 503. A linkage shaft 12 is rotatably installed in the middle of the carrier frame 1. Both ends of the linkage shaft 12 are connected to second linkage wheels 13 through one-way bearings. The one-way bearings installed on the two second linkage wheels 13 rotate in opposite directions. One end of the linkage shaft 12 is connected to a third linkage wheel 14. The first linkage wheel 20 and the third linkage wheel 14 are connected by a first linkage belt 15. Fourth linkage wheels 17 are installed on both sides of the carrier frame 1 and at the alignment corners through brackets 16. The positions of the two fourth linkage wheels 17 can be Figure 1 and Figure 2 It is intuitively understood that the second linkage wheel 13 is connected to the adjacent fourth linkage wheel 17 on the same side through the second linkage belt 18, and the fourth linkage wheel 17 is detachably connected to the main rod 302 located below the adjacent frame 301, and when the transmission roller 501 rotates forward or reversely, it can only drive one of the fourth linkage wheels 17 to rotate, and the positioning fixture 6 also includes a driving mechanism 605, which drives the straight rod 604 to perform linear reciprocating motion through the driving mechanism 605. The reduction motor 503 not only realizes the rotation of the conveyor belt 502, but also realizes the rotation of the sprocket wheels 303 on the two storage racks 3, thereby satisfying the adjustment of the position of the conveying fixture 4. However, considering that the conveying fixture 4 on the storage rack 3 needs to adjust its position to replace the next conveying fixture 4 after completing feeding or dropping at the feeding station, and the positioning fixture 6 itself also needs to switch its position between the feeding end and the dropping end, the specific principle of this embodiment is as follows:

[0049] When the reduction motor 503 drives the transmission roller 501 to rotate, under the cooperation of the first linkage wheel 20 and the third linkage wheel 14, the rotation direction of the linkage shaft 12 is the same as the rotation direction of the transmission roller 501, but the two second linkage wheels 13 are installed on the linkage shaft 12 through one-way bearings, and the directions of the two one-way bearings are opposite, the main rod 302 is connected to the fourth linkage wheel 17, and the fourth linkage wheel 17 and the third linkage wheel 14 maintain transmission connection through the second linkage belt 18, so when the linkage shaft 12 is driven by the reduction motor 503 to rotate in one direction When the sprocket 303 and the chain 304 on only one material storage rack 3 can operate normally, while the sprocket 303 and the chain 304 on the other material storage rack 3 do not work, because the inner ring of the one-way bearing is mounted on the linkage shaft 12, and the outer ring is mounted on the third linkage wheel 14. Therefore, when the linkage shaft 12 rotates in one direction, if the direction is the rotation direction of the one-way bearing, the inner ring rotates relative to the outer ring, and the outer ring is fixed on the third linkage wheel 14. Therefore, if slippage occurs, the third linkage wheel 14 cannot be driven to rotate smoothly, otherwise the third linkage wheel 14 can be driven to rotate smoothly.

[0050] Based on the above disclosed content, taking the movement of the positioning fixture 6 from the feeding end to the blanking end as an example, the linkage shaft 12 drives the third linkage wheel 14 and the fourth linkage wheel 17 corresponding to the feeding end storage rack 3 to rotate. At this time, the circuit board has been transferred to the positioning fixture 6, and the straight rod 604 has been separated from the linkage plate 407 under the cooperation of the driving mechanism 605. The linkage plate 407 and the shielding plate 403 are reset under the action of the spring, then the empty conveying fixture 4 will move, so that the conveying fixture 4 with the circuit board is moved to the feeding station, but at this time The feeding rack at the blanking end does not work. Similarly, when the positioning fixture 6 moves from the blanking end to the feeding end, the conveying fixture 4 at the blanking end will move to replace the unloaded conveying fixture 4. At this time, there is a circuit board on the conveying fixture 4 on the feeding end, so the storage rack 3 at the feeding end will not move. In this way, the storage rack 3 can move to achieve alternating loading and unloading of circuit boards, and no additional electric drive components are required to complete the drive. In this way, the entire storage rack 3 only has a mechanical structure, and there is no need to configure a separate power structure.

[0051] like Fig.15 As shown, the specific structure of the fourth linkage wheel 17 of the present application is disclosed. Considering the number of conveying fixtures 4 on the storage rack 3, in order to meet the requirement that the positioning fixture 6 moves a stroke (a stroke from the feeding end to the blanking end, or a stroke from the blanking end to the feeding end) to realize the conveying fixture 4 moving a fixed distance, the fixed distance refers to the distance from the next conveying fixture 4 to the feeding station, the fourth linkage wheel 17 includes a support shaft 1701 rotatably connected to the bracket 16, as shown in FIG. Figure 7As shown, the support shaft 1701 and the main rod 302 are locked by bolts, a center block 1702 is installed at the end of the support shaft 1701, and at least three positioning frames 1703 distributed in a circular array with the axis of the center block 1702 are installed on the center block 1702, an adjusting screw 1704 is installed through the positioning frame 1703, and two locking nuts are sleeved on the adjusting screw 1704, which are respectively located on both sides of the position where the positioning frame 1703 is penetrated by the adjusting screw 1704, and the end of the adjusting screw 1704 located outside the positioning frame 1703 is connected with an arc block 1705, and the outer contours of the multiple arc blocks 1705 can be enclosed to form a circle, the second linkage belt 18 is sleeved on the outside of the multiple arc blocks 1705, and the support shaft 1701 is sleeved with a dial 1706. By adjusting the center block 17 02 is used to change the radius of the circle enclosed by the center block 1702 to achieve the purpose of adjusting the transmission ratio, thereby realizing stroke adjustment. The length of a stroke is divided by the circumference of the transmission roller to obtain the number of circles that the rotating roller needs to rotate. Taking the number of conveying clamps 4 on the storage rack 3 as n as an example, the sprocket 303 needs to rotate 1 / n, which is equal to a fixed distance. The transmission ratios of the first interlocking wheel 20 and the third interlocking wheel 14 are fixed values, and the size of the second interlocking wheel 13 is fixed. Therefore, the transmission ratio adjustment requirement is met only by adjusting the size of the fourth interlocking wheel 17, so that the positioning clamp 6 moves a stroke and the conveying clamp 4 moves a fixed distance. The dial 1706 is designed to meet the adjustment accuracy. When adjusting, loosen the nut, adjust the position of the adjusting screw 1704, and then tighten the nut.

[0052] like Figure 10-13As shown, the specific structure of the driving mechanism 605 of the present application is disclosed. Because the chain 304 and the conveyor belt 502 are movable, the movement of the base plate 601 requires a separate power to drive. Two guide grooves 7 distributed in opposite positions are constructed on the carrier 1. A mounting plate 8 is installed on the conveyor belt 502. Rollers 9 are installed on both sides of the mounting plate 8. The rollers 9 and the guide grooves 7 are rollingly matched. The rollers 9 cooperate with the guide grooves 7 to provide a linear guide for the mounting plate 8. The driving mechanism 605 includes a cylinder push rod 6051, a positioning rack 6052 and a sliding rod 10 installed on the mounting plate 8. The cylinder push rod 6051 is movable. The plug end is connected with a mounting frame 6053, which is slidably matched with the sliding rod 10. A transmission gear 6054 is rotatably mounted on the mounting frame 6053. The straight rod 604 is provided with teeth meshing with the transmission gear 6054. The straight rod 604 is slidably matched with the positioning rack 6052. Two positioning rods 22 are installed on the positioning rack 6052. The straight rod 604 is provided with a positioning groove 21. The positioning rod 22 is slidably matched with the positioning groove 21. The straight rod 604 plays a role of limiting guide. A travel switch is installed in the guide groove 7 of the carrier frame, and the roller 9 can contact the travel switch. And triggered, the travel switch, reduction motor 503, cylinder push rod 6051, and the switching valve circuit of the suction cup 602 are all connected to the control system of the patch device. Assuming that the two travel switches are A (at the feeding end) and B (at the blanking end), when the reduction motor 503 drives the positioning fixture 6 on the conveyor belt 502 to move to the feeding end, the roller 9 contacts A, the reduction motor 503 and the cylinder push rod 6051 start to drive the mounting frame 6053 to move, the transmission gear 6054 rolls relative to the positioning rack 6052, and synchronously drives the straight rod 604 to move, and the straight rod 604 gradually enters The linkage plate 407 drives the shield plate 403 to be lowered, and the substrate 601 enters under the circuit board. The switching valve works to open the pipeline and complete the adsorption of the circuit board. The start time of the cylinder push rod 6051 is earlier than the working time of the switching valve. This ensures that the suction cup 602 works only after it is under the circuit board. Then the cylinder push rod 6051 is reset to the initial position, and the reduction motor 503 rotates in the opposite direction again, thereby driving the positioning fixture 6 to move from the feeding end to the blanking end, and stays in the mounting mechanism 2 for a period of time to complete the mounting work, and then moves to the blanking end to contact B, repeating the actions to complete the blanking.

[0053] An embodiment of the present application provides a positioning and anti-deviating mounting method for an SMT placement machine production line, using the above-mentioned positioning and anti-deviating mounting component for an SMT placement machine production line, including the following steps:

[0054] Move the two material storage racks 3 to the feeding end and the blanking end of the carrier 1 respectively, lock the position of the material storage rack 3, and connect the support shaft 1701 with the main rod 302, with the positioning fixture 6 at the feeding end;

[0055] The positioning fixture 6 works to transfer the circuit board from the conveying fixture 4 to the positioning fixture 6, and the reduction motor 503 is started to drive the conveying mechanism 5 to work, and the positioning fixture 6 moves from the feeding end to the blanking end;

[0056] The positioning fixture 6 moves with the conveying mechanism 5 to the mounting mechanism 2 station to complete the mounting action;

[0057] The positioning fixture 6 moves to the blanking end storage rack 3 along with the conveying mechanism 5 , and the positioning fixture 6 performs work to transfer the circuit board from the positioning fixture 6 to the conveying fixture 4 .

[0058] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A positioning and anti-deviating mounting assembly for an SMT mounting machine production line, comprising a carrier (1), wherein a mounting mechanism (2) is arranged on the carrier (1), wherein the two ends of the carrier (1) are a feeding end and a blanking end, respectively, and wherein: Also includes: Two material storage racks (3) are respectively detachably positioned and connected to the feeding end and the blanking end of the carrier frame (1); a plurality of conveying fixtures (4) are arranged on the material storage rack (3); the circuit board is confined in the conveying fixtures (4); the plurality of conveying fixtures (4) are moved in a circular cycle on the material storage rack (3); the material storage rack (3) has a conveying station; the conveying fixtures (4) are aligned with the feeding end or the blanking end through the conveying station; A conveying mechanism (5) is mounted on the carrier frame (1), and a positioning fixture (6) is arranged on the conveying mechanism (5), and the positioning fixture (6) is used to carry the circuit board and position the circuit board on the positioning fixture (6), wherein the conveying mechanism (5) is used to drive the positioning fixture (6) to continuously move back and forth between the feeding end and the blanking end, and the positioning fixture (6) and the conveying fixture (4) complete the transfer of the circuit board at the feeding station, when the positioning fixture (6) is at the feeding end, the circuit board is transferred from the conveying fixture (4) to the positioning fixture (6), and when the positioning fixture (6) is at the blanking end, the circuit board is transferred from the positioning fixture (6) to the conveying fixture (4).

2. The positioning and anti-deviating mounting assembly for an SMT placement machine production line according to claim 1, characterized in that: The conveying fixture (4) comprises two side plates (401) arranged at intervals, and opposite sides of the two side plates (401) are each configured with a receiving notch (402). The circuit board is located between the two side plates (401) and inserted into the two receiving notches (402). A shield plate (403) is slidably mounted on the two side plates (401), and the shield plate (403) encloses and covers the open ends of the two receiving notches (402) to limit the movement of the circuit board. A spring is connected between the shield plate (403) and the side plates (401).

3. The positioning and anti-deviating mounting assembly for an SMT placement machine production line according to claim 2, characterized in that: The material storage rack (3) comprises a frame (301), wherein two main rods (302) which are arranged parallel to each other in an upper and lower direction are rotatably connected in the frame (301), two sprocket wheels (303) are mounted on the main rods (302), a chain (304) is meshedly connected between two upper and lower adjacent sprocket wheels (303), a guide rail (305) located in an area enclosed between the four sprocket wheels (303) is mounted on the frame (301), a connecting rod (405) and a guide wheel (406) are rotatably mounted on the side plate (401), an end of the connecting rod (405) is rotatably connected to a link of the chain (304), and the guide wheel (406) is rollingly mounted in the guide rail (305).

4. The positioning and anti-deviating mounting assembly for an SMT placement machine production line according to claim 2, characterized in that: The shielding plate (403) is provided with a linkage plate (407) located between the two side plates (401); one side of the linkage plate (407) is provided with an inclined groove (408); the other side of the linkage plate (407) is provided with a clearance hole (409) connected to the inclined groove (408); the positioning fixture (6) comprises two horizontally spaced base plates (601); at least two suction cups (602) are provided on the base plates (601); the two base plates (601) are connected via a support plate (603); the support plate (603) is connected with a straight rod (604) via a rotating member; the straight rod (604) is connected to the conveying mechanism (5); both ends of the straight rod (604) are provided with inclined surfaces; the end of the straight rod (604) can be inserted into the inclined groove (408) and extended through the clearance hole (409).

5. The positioning and anti-deviating mounting assembly for an SMT placement machine production line according to claim 4, characterized in that: The rotating member comprises a locking groove (606) constructed on the straight rod (604); the support plate (603) is rotatably connected to the straight rod (604); a locking rod (607) is connected to the support plate (603) via a spring; the locking rod (607) and the support plate (603) are slidably matched; the end of the locking rod (607) has two inner inclined surfaces; the locking groove (606) has two outer inclined surfaces; and a positioning telescopic rod (11) is installed on the support frame (1).

6. The positioning and anti-deviating mounting assembly for an SMT mounting machine production line according to claim 4, characterized in that: The conveying mechanism (5) comprises two transmission rollers (501) rotatably mounted on a carrier frame (1); transmission sleeves on the two transmission rollers (501) are provided with conveyor belts (502); the straight rod (604) is mounted on the conveyor belts (502); and a reduction motor (503) connected to one of the transmission rollers (501) is mounted on the carrier frame (1).

7. The positioning and anti-deviating mounting assembly for an SMT placement machine production line according to claim 6, characterized in that: A first linkage wheel (20) is mounted on a transmission roller (501) connected to a reduction motor (503); a linkage shaft (12) is rotatably mounted in the middle of the carrier frame (1); both ends of the linkage shaft (12) are connected to second linkage wheels (13) via one-way bearings; one end of the linkage shaft (12) is connected to a third linkage wheel (14); the first linkage wheel (20) and the third linkage wheel (14) are connected in transmission via a first linkage belt (15); both sides of the carrier frame (1) and at the alignment corners are provided with brackets (16) A fourth linkage wheel (17) is provided, the second linkage wheel (13) is connected to an adjacent fourth linkage wheel (17) on the same side by a second linkage belt (18), the fourth linkage wheel (17) is detachably connected to a main rod (302) located below the adjacent frame (301), and when the transmission roller (501) rotates forward or reversely, only one of the fourth linkage wheels (17) can be driven to rotate, and the positioning fixture (6) further comprises a driving mechanism (605), which drives the straight rod (604) to perform linear reciprocating motion through the driving mechanism (605).

8. The positioning and anti-deviating mounting assembly for an SMT mounting machine production line according to claim 7, characterized in that: The fourth linkage wheel (17) comprises a support shaft (1701) rotatably connected to the bracket (16); a center block (1702) is mounted at the end of the support shaft (1701); at least three positioning frames (1703) are mounted on the center block (1702) and are distributed in a circular array around the axis of the center block (1702); an adjusting screw (1704) is installed through the positioning frame (1703); and two locking nuts are sleeved on the adjusting screw (1704), which are respectively located on both sides of the location where the adjusting screw (1704) penetrates the positioning frame (1703); an arc block (1705) is connected to the end of the adjusting screw (1704) located outside the positioning frame (1703); the outer contours of the plurality of arc blocks (1705) can be enclosed to form a circle; and the second linkage belt (18) is sleeved on the outside of the plurality of arc blocks (1705).

9. The positioning and anti-deviating mounting assembly for an SMT mounting machine production line according to claim 8, characterized in that: The carrier frame (1) is provided with two guide grooves (7) arranged in opposite positions. A mounting plate (8) is installed on the conveyor belt (502). Rollers (9) are installed on both sides of the mounting plate (8). The rollers (9) are in rolling cooperation with the guide grooves (7). The driving mechanism (605) comprises a cylinder push rod (6051) and a positioning rack (6052) installed on the mounting plate (8). The piston end of the cylinder push rod (6051) is connected to a mounting frame (6053). A transmission gear (6054) is rotatably installed on the mounting frame (6053). The straight rod (604) is provided with teeth meshing with the transmission gear (6054). The straight rod (604) is in sliding cooperation with the positioning rack (6052).

10. A positioning and anti-deviation mounting method for an SMT placement machine production line, using the positioning and anti-deviation mounting component for an SMT placement machine production line as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Move the two material storage racks (3) to the feeding end and the blanking end of the support rack (1) respectively, lock the position of the material storage rack (3), and connect the support shaft (1701) with the main rod (302), with the positioning fixture (6) at the feeding end; The positioning fixture (6) performs work to transfer the circuit board from the conveying fixture (4) to the positioning fixture (6), and the reduction motor (503) is started to drive the conveying mechanism (5) to work, and the positioning fixture (6) moves from the feeding end to the blanking end; The positioning fixture (6) moves along with the conveying mechanism (5) to the workstation of the mounting mechanism (2) to complete the mounting action; The positioning fixture (6) moves along with the conveying mechanism (5) to the blanking end storage rack (3), and the positioning fixture (6) performs work to transfer the circuit board from the positioning fixture (6) to the conveying fixture (4).

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