An automatic compensation device for concentricity error of a nozzle of a packaging placement machine

Abstract

The present invention discloses an automatic compensation device for the concentricity error of a nozzle of a packaging placement machine, and the present invention relates to the field of placement machine technology. By setting a second correction mechanism, the action of the nozzle mechanism moving downward to absorb the electronic component sheet can be utilized, so that the bottom ends of multiple correction mechanisms II and the top of the carrier plate are abutted against each other, thereby utilizing the reaction force of the carrier plate to the correction mechanism II to push it upward, and then synchronously realizing the effect of multiple arc-shaped push blocks pushing the driving rod to move in a directional manner, so that multiple driving rods push the nozzle body from multiple directions to restore it to its original position, thereby achieving the purpose of correcting the position of the nozzle body; secondly, multiple correction mechanisms II utilize the power of the nozzle mechanism to absorb the electronic component sheet to complete the correction of the position of the nozzle body, and there is no need to set up a separate power device for the operation of the correction mechanism II, which makes the structure simpler, saves costs, and is convenient for subsequent inspection and maintenance work.

Description

Technical Field

[0001] The invention relates to the technical field of chip mounters, in particular to an automatic compensation device for the concentricity error of a nozzle of a packaging chip mounter. Background Art

[0002] A chip mounter is an automated device used to mount electronic components. It is usually used in printed circuit board assembly production lines to quickly and accurately place surface mount components of various sizes and shapes on the designated locations on the PCB. The chip mounter can greatly improve production efficiency and reduce labor costs, and is one of the indispensable key equipment in the modern electronic manufacturing industry.

[0003] At present, placement machines have increasingly higher requirements for high speed and high precision. With the increase in speed, the temperature of the equipment itself changes due to the heat generated by the motor itself and other factors. This temperature change will inevitably cause the equipment itself to expand and deform, affecting the accuracy of the equipment.

[0004] A chip mounter, a mounting correction device and a correction method thereof disclosed in the patent application with reference to publication number CN104735920A, the patent application is provided with a mounting correction device, the device is provided with a correction mechanism, the correction mechanism is provided with at least three slidable sliding blocks, each sliding block can correct the position of the sheet while moving toward the sheet placement position, so even if the position deviation of the sheet is large, the chip mounter can still complete the mounting work normally. The mounting correction device of the patent application has a simple structure, is easy to operate and maintain, and can effectively reduce the requirements of the chip mounter for the sheet, reduce the use conditions of the chip mounter, increase the use range of the chip mounter, and is conducive to improving production efficiency and reducing production costs.

[0005] A comprehensive analysis of the above patents reveals the following defects:

[0006] 1) During the operation of the above-mentioned placement machine, due to changes in ambient temperature and equipment temperature, the nozzle head used to absorb electronic components and the camera used to capture the position of electronic components are offset due to the deformation of their own structures, resulting in serious errors in accuracy. In high-precision placement situations, this error causes the equipment to be unable to be used normally; secondly, only the position of the sheet material is corrected, and the position of the nozzle head of the placement machine cannot be corrected, thereby failing to completely improve the placement accuracy of the placement machine, resulting in a high rate of defective placement of circuit boards.

[0007] Therefore, the present invention proposes an automatic compensation device for the concentricity error of a nozzle of a packaging placement machine to solve the above problem. Summary of the invention

[0008] In view of the deficiencies in the prior art, the present invention provides an automatic compensation device for the concentricity error of the suction nozzle of a packaging placement machine, which solves the problem that during the operation of the current placement machine, due to changes in ambient temperature and equipment temperature, the suction nozzle head used for adsorbing electronic components and the camera for capturing the position of electronic components are offset due to the deformation of their own structures, resulting in serious errors in accuracy. In high-precision placement situations, the error causes the equipment to be unable to be used normally; secondly, only the position of the sheet material is corrected, and the position of the suction nozzle head of the placement machine cannot be corrected, thereby failing to completely improve the placement accuracy of the placement machine, resulting in a high placement defective rate of circuit boards.

[0009] To achieve the above objectives, the present invention is implemented through the following technical scheme: an automatic compensation device for the concentricity error of a packaging placement machine nozzle, comprising a placement machine frame, a linear module movably arranged on the placement machine frame and a carrier plate arranged on the placement machine frame, and a control box for controlling the operation of electronic components is fixedly arranged on the placement machine frame.

[0010] A mounting plate is fixedly arranged on the outer wall of the linear module, and a nozzle mechanism for adsorbing electronic component sheets and an image capturing mechanism for capturing the position of the electronic component sheets are respectively arranged on the left and right sides of the front surface of the mounting plate, and a nozzle motor for driving the nozzle mechanism to complete the action of adsorbing the electronic component sheets is fixedly arranged on the side wall of the mounting plate. The image capturing mechanism transmits the captured image information of the position of the electronic component sheets to the control box, and the control box sends an instruction to adsorb or release the electronic component sheets to the nozzle motor to complete the operation of attaching the electronic component sheets to the circuit board.

[0011] The suction nozzle mechanism includes a supporting tube assembly connected to the output shaft of the suction nozzle motor, the supporting tube assembly includes a supporting tube 2 fixedly arranged on the output shaft of the suction nozzle motor and a long through hole and a circular through hole opened on the side wall of the supporting tube 2, the interior of the supporting tube 2 is provided with a suction nozzle head assembly for adsorbing electronic component sheets, and a plurality of correction mechanisms 2 for correcting the position of the suction nozzle head assembly are evenly arranged in the circumferential direction of the suction nozzle head assembly.

[0012] The image capture mechanism includes a carrier tube and a camera assembly arranged inside the carrier tube. A plurality of correction mechanisms for correcting the position of the camera assembly are evenly arranged in the circumferential direction of the camera assembly. An electric push rod for driving the carrier tube to move intermittently up and down is arranged above the carrier tube.

[0013] Furthermore, the nozzle head assembly includes a nozzle body, a circular ring fixedly mounted on the outer wall of the nozzle body, and a plurality of friction plates 2 evenly fixedly mounted on the top of the nozzle body; a plurality of bearing rods 2 are evenly fixedly mounted on the side wall of the nozzle body; and a rubber sleeve 2 is fixedly mounted on the outer wall of each of the bearing rods 2 and on the outer wall of the long through hole.

[0014] Furthermore, the second correction mechanism includes a correction rod that slides through the second cavity of the supporting cylinder, a pressure plate fixedly arranged at the top of the correction rod and a pointed cone fixedly arranged on one side of the bottom of the pressure plate, a correction unit for correcting the position of the electronic component sheet is sleeved on the outer wall of the correction rod away from the pressure plate, an actuator for correcting the position of the nozzle head assembly is movably sleeved on the outer wall of the correction rod and located between the pressure plate and the correction unit, a power component for driving the actuator to work is provided on the outer wall of the correction rod, a spring retaining ring is fixedly sleeved on the outer wall of the correction rod and located below the circular ring, and a spring is slidably sleeved on the outer wall of the correction rod and located between the spring retaining ring and the circular ring.

[0015] Furthermore, the actuator includes a driving rod slidably connected to the inside of the circular through hole and an insulating sleeve fixedly arranged at one end of the driving rod. An active cavity is opened on the outer wall of the driving rod to provide space for the movement of the supporting block, and an arc-shaped protrusion is fixedly arranged on the side wall of the active cavity.

[0016] Furthermore, the power component includes a bearing block fixedly sleeved on the outer wall of the correction rod and movably arranged inside the movable cavity, and an arc-shaped push block for pushing the arc-shaped protrusion to move is fixedly arranged on the side wall of the bearing block.

[0017] Furthermore, the bottom end of the pointed cone abuts against the top of the second friction plate to prevent the position of the suction nozzle body from shifting.

[0018] Furthermore, the correction unit includes a supporting tube fixedly mounted on the outer wall of the correction rod and an adjusting cavity opened inside the supporting tube, a screw rod is rotated through the inside of the adjusting cavity, a slider is connected to the outer wall of the screw rod and located in the internal thread of the adjusting cavity, a correction plate for pushing the electronic component sheet to move and completing the position correction operation is fixedly provided at one end of the slider, a pointer is fixedly provided on the side wall of the slider, an adjusting through groove for observing the position of the pointer is opened on the side wall of the supporting tube, and a scale line for measuring the moving distance of the pointer is opened on the outer wall of the supporting tube and located on one side of the adjusting through groove.

[0019] Furthermore, the structure of the carrier tube 1 is exactly the same as that of the supporting tube assembly, and is used to provide support and space for the operation of the camera assembly and the correction mechanism 1.

[0020] Furthermore, the camera assembly includes a camera body and a friction plate evenly fixedly arranged on the top of the camera body, a plurality of bearing rods evenly fixedly arranged on the outer wall of the camera body, and a rubber sleeve fixedly arranged on the outer wall of the bearing rod.

[0021] Beneficial Effects

[0022] The present invention provides an automatic compensation device for the concentricity error of a nozzle of a packaging placement machine. Compared with the prior art, the device has the following beneficial effects:

[0023] 1. An automatic compensation device for the concentricity error of a nozzle of a packaging placement machine can utilize the action of the nozzle mechanism moving downward to absorb electronic component sheets by setting a second correction mechanism. The bottom ends of multiple correction mechanisms II and the top of a carrier plate are abutted against each other, thereby utilizing the reaction force of the carrier plate to the correction mechanism II to push it upward, and then synchronously achieving the effect of multiple arc-shaped push blocks pushing the driving rods to move in a directional manner, so that multiple driving rods push the nozzle body from multiple directions to restore it to its original position, thereby achieving the purpose of correcting the position of the nozzle body; secondly, multiple correction mechanisms II utilize the power of the nozzle mechanism to absorb the electronic component sheets to complete the correction of the position of the nozzle body, and there is no need to separately set a power device for the operation of the correction mechanism II, which makes the structure simpler, saves costs, and facilitates subsequent inspection and maintenance work.

[0024] 2. An automatic compensation device for the concentricity error of the nozzle of a packaging placement machine, wherein each correction mechanism is an independent part, and the position deviation of the nozzle head assembly caused by temperature change in any direction can be "sensed" by one or more correction mechanisms in that direction, that is, the position deviation of the nozzle head assembly can push one or more correction mechanisms in that direction to produce synchronous deviation, and by utilizing the characteristic that the correction rod can only move in the vertical direction, the arc-shaped push block can push the drive rod to the original position each time, thereby utilizing the drive rod to complete the correction of the position of the nozzle head assembly.

[0025] 3. An automatic compensation device for the concentricity error of a nozzle of a packaging placement machine can realize automatic correction of the position of a camera body from multiple directions through the setting of a correction mechanism 1, utilizing the same principle as that of a correction mechanism 2. The position correction of the camera body can be realized without setting up a complicated position correction system, making the position correction work of the camera body simpler and more efficient.

[0026] 4. An automatic compensation device for the concentricity error of a nozzle of a packaging placement machine, by setting a correction unit, can utilize the downward movement process of the correction rod to enable multiple correction units to correct the position of the electronic component sheet from multiple directions, thereby achieving a synchronous correction effect on the nozzle body and the electronic component sheet, greatly improving the placement accuracy of the placement machine; secondly, by setting a screw rod, the position of the correction plate can be adjusted, so that the correction plate can be suitable for electronic component sheets of different sizes, thereby improving the scope of application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0028] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of part A;

[0029] Figure 3 For the present invention Figure 1 A schematic diagram of the enlarged structure of part B in FIG.

[0030] Figure 4 It is a schematic cross-sectional view of the structure of the nozzle mechanism of the present invention;

[0031] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of part C in FIG.

[0032] Figure 6 This is a schematic diagram of the structure of the nozzle assembly of the present invention after removing the second supporting tube;

[0033] Figure 7 It is a schematic diagram of the structure of the nozzle head assembly of the present invention;

[0034] Figure 8 This is a schematic diagram of the second structure of the correction mechanism of the present invention;

[0035] Fig. 9 For the present invention Figure 8 The D part in the figure is an enlarged structural diagram;

[0036] Fig.10 It is a schematic diagram of the cross-sectional structure of the driving rod of the present invention;

[0037] Fig.11 This is a schematic structural diagram of the driving rod and the bearing block in the assembly state of the present invention;

[0038] Fig.12 This is a schematic structural diagram of the assembly state of the pressing plate and the pointed cone of the present invention;

[0039] Fig.13 This is a schematic diagram of the correction unit structure of the present invention;

[0040] Fig.14 It is a schematic diagram of the cross-sectional structure of the correction unit of the present invention;

[0041] Fig.15 It is a schematic diagram of the structure of the image capturing mechanism of the present invention.

[0042] In the figure: 1, linear module; 2, mounting plate; 3, image capture mechanism; 31, bearing tube 1; 32, camera assembly; 321, camera body; 322, friction plate 1; 323, bearing rod 1; 324, rubber sleeve 1; 33, correction mechanism 1; 34, electric push rod; 4, nozzle mechanism; 41, bearing tube 2; 42, long through hole; 43, round through hole; 44, nozzle head assembly; 441, nozzle body; 442, friction plate 2; 443, bearing rod 2; 444, rubber sleeve 2; 45, correction machine Structure 2; 451, correction rod; 452, pressure plate; 453, pointed cone; 454, correction unit; 4541, bearing tube; 4542, screw; 4543, correction plate; 4544, slider; 4545, pointer; 4546, adjustment slot; 4547, scale line; 455, driving rod; 456, insulation sleeve; 457, movable cavity; 458, arc-shaped protrusion; 459, bearing block; 4510, arc-shaped push block; 4511, spring retaining ring; 4512, spring; 5, nozzle motor; 6, bearing plate. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] like Figure 1-Figure 15 The present invention provides three technical solutions: an automatic compensation device for the concentricity error of a nozzle of a packaging placement machine, specifically including the following embodiments:

[0045] Embodiment 1: An automatic compensation device for the concentricity error of a nozzle of a packaging placement machine, comprising a placement machine frame, a linear module 1 movably arranged on the placement machine frame, and a carrier plate 6 arranged on the placement machine frame, wherein a plurality of electronic component sheet support points are evenly arranged on the carrier plate 6 for carrying the electronic component sheets, a control box for controlling the operation of the electronic components is fixedly arranged on the placement machine frame, and the control box and each electronic component in the placement machine are electrically connected through a wire, and the linear module 1 is composed of the following parts: a linear track: a guide rail for carrying a module or other objects; a sensor: used to detect the position or movement state of the module on the track to adjust the speed and direction of the module. Motor: a power device for driving the module to move on the track; a controller: responsible for controlling the motor and the sensor so that the module moves according to a preset path and speed; a module carrier: carrying objects or equipment that actually need to move on the linear track; a structural support: a support structure for supporting and fixing various components such as the linear track, the motor, and the controller. The supporting plate 6 is located directly below the bottom end of the suction nozzle mechanism 4, and the circular area formed by the multiple correction mechanisms 45 is much larger than the projected area of ​​the electronic component sheet, so the suction nozzle mechanism 4 will not cause interference when sucking the electronic component sheet. A mounting plate 2 is fixedly provided on the outer wall of the linear module 1, and a suction nozzle mechanism 4 for sucking the electronic component sheet and an image capture mechanism 3 for capturing the position of the electronic component sheet are respectively provided on the left and right sides of the front of the mounting plate 2. A suction nozzle motor 5 for driving the suction nozzle mechanism 4 to complete the action of sucking the electronic component sheet is fixedly provided on the side wall of the mounting plate 2. The image capture mechanism 3 transmits the captured image information of the position of the electronic component sheet to the control box, and the control box sends an instruction to suck or release the electronic component sheet to the suction nozzle motor 5 to complete the operation of attaching the electronic component sheet to the circuit board; the suction nozzle mechanism 4 includes a support cylinder assembly connected to the output shaft of the suction nozzle motor 5, and the support cylinder assembly includes a support cylinder 41 fixedly provided on the output shaft of the suction nozzle motor 5 and an opening on the side of the support cylinder 41 The elongated through hole 42 and the circular through hole 43 are formed on the wall, and a nozzle head assembly 44 for adsorbing electronic component sheets is arranged inside the supporting tube 41, and a plurality of correction mechanisms 45 for correcting the position are evenly arranged in the circumferential direction of the nozzle head assembly 44; the nozzle head assembly 44 comprises a nozzle body 441, a circular ring fixedly sleeved on the outer wall of the nozzle body 441, and a plurality of friction plates 442 evenly fixedly arranged on the top of the nozzle body 441, and a movable gap is reserved between the correction rod 451 and the circular ring, and the gap ensures that the circular ring and the correction rod 451 do not contact each other, and a plurality of supporting rods 443 are evenly fixedly arranged on the side wall of the nozzle body 441, and a rubber sleeve 444 is fixedly sleeved on the outer wall of each supporting rod 443 and on the outer wall of the elongated through hole 42.The rubber sleeve 444 itself has a certain elasticity, so that the bearing rod 443 has a certain displacement space in the up and down direction inside the long through hole 42, and there is a certain friction between the outer wall of the rubber sleeve 444 and the inner wall of the long through hole 42, which can ensure that the cone 453 and the friction plate 442 are separated to stabilize the suction nozzle body 441. The suction nozzle head assembly 44 is connected to the air pump through an air pipe. The air pump is used to provide the suction nozzle head assembly 44 with power to adsorb electronic component sheets. The air pump is fixed on the outer wall of the mounting plate 2, and the operation of the air pump is controlled by the control box. The number of the long through hole 42 is the same as that of the bearing rod 443, and the positions correspond one to one. Since the long through hole 42 is long, the bearing rod 443 can move along the inner wall of the long through hole 42 when subjected to external force.

[0046] Embodiment 2: The main difference between this embodiment and the first technical solution is that: an automatic compensation device for the concentricity error of the nozzle of a packaging placement machine, the correction mechanism 45 includes a correction rod 451 slidingly penetrating the cavity of the carrier tube 41, a pressure plate 452 fixedly arranged at the top of the correction rod 451 and a pointed cone 453 fixedly arranged at one side of the bottom of the pressure plate 452, the correction rod 451 and the carrier tube 41 are slidably connected, and a correction rod 451 is sleeved on the outer wall of the correction rod 451 away from the pressure plate 452 for correcting the electric The correction unit 454 of the position of the sub-element sheet, the outer wall of the correction rod 451 and the movable sleeve between the pressure plate 452 and the correction unit 454 are provided with an actuator for correcting the position of the nozzle head assembly 44, the outer wall of the correction rod 451 is provided with a power component for driving the actuator to work, the outer wall of the correction rod 451 and the fixed sleeve below the ring is provided with a spring retaining ring 4511, and the outer wall of the correction rod 451 and the sliding sleeve between the spring retaining ring 4511 and the ring is provided with a spring 4512. The position of the sharp cone 453 corresponds to the friction plate 2 442 one by one, and the position of the sharp cone 453 is blocked by the friction plate 2 442 but not completely restricted. Under the action of a certain amount of force, the friction between the friction plate 2 442 and the sharp cone 453 can be overcome to cause displacement, which is the same as the working principle of the carrier tube 1 31 and the camera assembly 32 in the camera image capture mechanism 3, and the operation of the image capture mechanism 3 will not be repeated here. The bottom end of the correction rod 451 protrudes from the suction nozzle body 441, so that when the suction nozzle mechanism 4 moves vertically downward, the correction rod 451 contacts the carrier plate 6 before the suction nozzle body 441, and the correction work of the suction nozzle body 441 and the electronic component sheet body is completed in advance. The execution component includes a driving rod 455 slidably connected to the inside of the circular through hole 43 and a heat insulation sleeve 456 fixedly set at one end of the driving rod 455. When the suction nozzle head body 441 is in an initial state of non-operation, the side wall of the heat insulation sleeve 456 and the side wall of the suction nozzle head body 441 are in contact, and there is no force between the two in this state. An active cavity 457 is opened on the outer wall of the driving rod 455 to provide space for the movement of the carrier block 459, and an arc-shaped protrusion 458 is fixedly set on the side wall of the active cavity 457. There is a certain size of movable gap 1 between the outer wall of the driving rod 455 and the inner wall of the circular through hole 43, which can allow the driving rod 455 to move within a certain range, and there is a movable gap 2 between the movable cavity 457 and the bearing block 459, so that the bearing block 459 and the inner wall of the movable cavity 457 do not contact each other. In the initial position state, the side wall of the arc-shaped push block 4510 and the arc-shaped protrusion 458 do not contact each other, and push the bearing block 459 upward. After the arc-shaped push block 4510 and the arc-shaped protrusion 458 meet, no thrust is generated on the arc-shaped protrusion 458. The power component includes a bearing block 459 fixedly sleeved on the outer wall of the correction rod 451 and movably arranged inside the movable cavity 457, and an arc-shaped push block 4510 for pushing the arc-shaped protrusion 458 to move is fixedly arranged on the side wall of the bearing block 459.The bottom end of the pointed cone 453 abuts against the top of the friction plate 442 to prevent the position of the suction nozzle body 441 from shifting. The correction unit 454 includes a bearing tube 4541 fixedly sleeved on the outer wall of the correction rod 451 and an adjustment chamber provided inside the bearing tube 4541. A screw 4542 rotates through the inside of the adjustment chamber. A slider 4544 is threadedly connected to the outer wall of the screw 4542 and located inside the adjustment chamber. A correction plate 4543 for pushing the electronic component sheet to move and completing the position correction operation is fixedly provided at one end of the slider 4544. A pointer 4545 is fixedly provided on the side wall of the slider 4544. An adjustment slot 4546 for observing the position of the pointer 4545 is provided on the side wall of the bearing tube 4541. A scale line 4547 for measuring the moving distance of the pointer 4545 is provided on the outer wall of the bearing tube 4541 and located on one side of the adjustment slot 4546. The pointer 4545 slides through the adjustment slot 4546 and slides along the outer wall of the carrier tube 4541. The distance between the correction plate 4543 and the electronic component sheet can be calculated by the position where the pointer 4545 and the scale line 4547 overlap. The distance between the correction plate 4543 and the center position of the carrier plate 6 is a known value. The screw 4542 rotates through the carrier tube 4541 and is fixedly provided with an adjustment knob for facilitating the rotation of the adjustment screw 4542. The slider 4544 is slidably provided in the adjustment cavity.

[0047] Embodiment 3: The main difference between this embodiment and the second technical solution is: an automatic compensation device for the concentricity error of the nozzle of the packaging placement machine, the image capture mechanism 3 includes a carrier tube 31 and a camera assembly 32 arranged inside the carrier tube 31, a plurality of correction mechanisms 33 for correcting the position of the camera assembly 32 are evenly arranged in the circumferential direction, and an electric push rod 34 for driving the carrier tube 31 to reciprocate intermittently up and down is arranged above the carrier tube 31. The electric push rod 34 is fixedly arranged on the front of the mounting plate 2, and the output shaft of the electric push rod 34 is fixedly connected to the top of the carrier tube 31. The output shaft of the electric push rod 34 is made of heat-insulating material, and the electric push rod 34 is intermittent motion. The heat generated during its working process can be fully dissipated during the intermittent period, and the influence of the heat during the working of the electric push rod 34 on its working accuracy can be ignored. The top of the camera assembly 32 is electrically connected with a wire, which passes through the carrier tube 31 and is electrically connected to the control box. Except for the structure of the correction unit 454, the other structures of the correction mechanism 33 are the same as the correction mechanism 2 45. The top of the camera assembly 32 is evenly provided with an anti-skid plate having the same structure as the friction plate 2 442. The structure of the bearing tube 1 31 is exactly the same as that of the supporting tube assembly, and is used to provide support and space for the operation of the camera assembly 32 and the correction mechanism 1 33. The camera assembly 32 includes a camera body 321 and a friction plate 1 322 evenly fixedly provided on the top of the camera body 321. A plurality of bearing rods 1 323 are evenly fixedly provided on the outer wall of the camera body 321, and a rubber sleeve 1 324 is fixedly provided on the outer wall of the bearing rod 1 323.

[0048] When in use, first adjust the correction unit 454 according to the size of the electronic component sheet to be adsorbed (for electronic component sheets with a circular cross-sectional shape). When adjusting, manually rotate the screw 4542. Since the screw 4542 and the slider 4544 are threadedly connected and the slider 4544 is rotatably connected to the supporting tube 4541, the slider 4544 can move left and right along the inner wall of the adjustment cavity. By observing the position of the pointer 4545 on the scale line 4547, and referring to the size of the electronic component sheet and the initial distance of the correction plate 4543 from the electronic component sheet support point on the top of the supporting plate 6, the correction plate 4543 is adjusted to be able to just contact the side wall of the electronic component sheet placed at the center of the electronic component sheet support point on the top of the supporting plate during the downward movement, but will not generate any force on the electronic component sheet. After the adjustment is completed, perform multiple simulated electronic component sheet adsorption actions until the preset effect can be achieved each time. When the placement machine is working, the linear module 1 drives the nozzle mechanism 4 to move to the top of the carrier plate 6, the camera body 321 captures the position of the electronic component sheet, and sends the image information to the control box, the control box sends instructions to the nozzle motor 5 and the air pump, the nozzle motor 5 drives the nozzle mechanism 4 to move toward the carrier plate 6, the correction plate 4543 first contacts the side wall of the electronic component sheet, when the electronic component sheet is not correctly placed on the support point, the correction plate 4543 pushes the electronic component sheet to the center of the support point from multiple directions at the same time. Then, since the bottom end of the correction rod 451 is longer than the nozzle body 441, the bottom end of the correction rod 451 first contacts the top of the carrier plate 6, and since the circular area formed by the multiple correction rods 451 is much larger than the area of ​​the electronic component sheet, the electronic component sheet is located at the center of the circular area formed by the multiple correction rods 451, so the correction rod 451 will not interfere with the position of the electronic component sheet. During the upward movement of the correction rod 451, the carrier block 459 is pushed upward synchronously. Since there are gaps reserved between the driving rod 455 and the circular through hole 43 and between the bearing rod 443 and the long through hole 42, if the position of the suction nozzle body 441 is offset due to temperature changes, the arc-shaped push block 4510 pushes the arc-shaped protrusion 458, and the driving rod 455 returns to its original position. During the process of the driving rod 455 returning to its original position, the suction nozzle body is pushed to reset synchronously. At the same time, the position of the suction nozzle body 441 is corrected together under the synchronous action of the correction mechanism 45 in multiple directions. After the suction nozzle body 441 and the top of the electronic component sheet are attached, the suction force generated by the air pump generates negative pressure at the bottom of the suction nozzle body 441, thereby adsorbing the electronic component sheet. When the suction nozzle body 441 moves upward, the bottom end of the correction rod 451 and the top of the carrier plate 6 are separated, and the correction rod 451 is pushed to reset under the elastic force of the spring 4512.While the suction nozzle body 441 moves downward to absorb the electronic component sheet, the electric push rod 34 is controlled by the control box and moves downward a certain distance synchronously to ensure that the correction mechanism 33 is in contact with the bottom of the carrier plate and to generate a certain force on the bottom end of the correction mechanism 33. The working process of the correction mechanism 33 is the same as that of the correction mechanism 45, which will not be repeated here.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic compensation device for the concentricity error of a nozzle of a packaging mounter, comprising a mount frame, a linear module movably arranged on the mount frame, and a carrier plate arranged on the mount frame, wherein a control box for controlling the operation of electronic components is fixedly arranged on the mount frame, characterized in that: A mounting plate is fixedly arranged on the outer wall of the linear module, and a nozzle mechanism for adsorbing electronic component sheets and an image capture mechanism for capturing the position of the electronic component sheets are respectively arranged on the left and right sides of the front of the mounting plate, and a nozzle motor for driving the nozzle mechanism to complete the action of adsorbing the electronic component sheets is fixedly arranged on the side wall of the mounting plate. The image capture mechanism transmits the captured image information of the position of the electronic component sheets to the control box, and the control box sends an instruction to adsorb or release the electronic component sheets to the nozzle motor, thereby completing the operation of attaching the electronic component sheets to the circuit board; The nozzle mechanism includes a support cylinder assembly connected to the nozzle motor output shaft, the support cylinder assembly includes a bearing cylinder 2 fixedly arranged on the nozzle motor output shaft and a long through hole and a circular through hole provided on the side wall of the bearing cylinder 2, a nozzle head assembly for adsorbing electronic component sheets is arranged inside the bearing cylinder 2, and a plurality of correction mechanisms 2 for correcting the position of the nozzle head assembly are evenly arranged in the circumferential direction of the nozzle head assembly; The image capture mechanism comprises a carrier tube 1 and a camera assembly arranged inside the carrier tube 1, a plurality of correction mechanisms 1 for correcting the position of the camera assembly are evenly arranged in the circumferential direction of the camera assembly, and an electric push rod for driving the carrier tube 1 to reciprocate intermittently up and down is arranged above the carrier tube 1; The second correction mechanism includes a correction rod that slides through the second cavity of the carrier tube, a pressure plate fixedly arranged at the top of the correction rod and a pointed cone fixedly arranged at one side of the bottom of the pressure plate, a correction unit for correcting the position of the electronic component sheet is sleeved on the outer wall of the correction rod away from the pressure plate, an actuator for correcting the position of the nozzle head assembly is movably sleeved on the outer wall of the correction rod and located between the pressure plate and the correction unit, a power component for driving the actuator to work is provided on the outer wall of the correction rod, a spring retaining ring is fixedly sleeved on the outer wall of the correction rod and located below the circular ring of the correction rod, and a spring is slidably sleeved on the outer wall of the correction rod and located between the spring retaining ring and the circular ring of the correction rod; The actuator comprises a driving rod slidably connected to the inside of the circular through hole and a heat-insulating sleeve fixedly arranged at one end of the driving rod, an activity cavity is opened on the outer wall of the driving rod to provide space for the movement of the bearing block, and an arc-shaped protrusion is fixedly arranged on the side wall of the activity cavity; The power component comprises the bearing block fixedly sleeved on the outer wall of the correction rod and movably arranged inside the movable cavity, and an arc-shaped push block for pushing the arc-shaped protrusion to move is fixedly arranged on the side wall of the bearing block; The nozzle head assembly includes a nozzle body, a ring fixedly sleeved on the outer wall of the nozzle body, and a plurality of friction plates 2 uniformly fixedly arranged on the top of the nozzle body, the bottom end of the pointed cone abuts against the top of the friction plate 2 to prevent the position of the nozzle body from being offset; The correction unit includes a supporting tube fixedly mounted on the outer wall of the correction rod and an adjusting cavity opened inside the supporting tube, a screw rod is rotated and penetrated inside the adjusting cavity, a slider is connected with the inner thread on the outer wall of the screw rod and located in the adjusting cavity, a correction plate for pushing the electronic component sheet to move and completing the position correction operation is fixedly arranged at one end of the slider, a pointer is fixedly arranged on the side wall of the slider, an adjusting groove for observing the position of the pointer is opened on the side wall of the supporting tube, and a scale line for measuring the moving distance of the pointer is opened on the outer wall of the supporting tube and located on one side of the adjusting groove.

2. The automatic compensation device for concentricity error of a nozzle of a packaging placement machine according to claim 1, characterized in that: A plurality of bearing rods 2 are evenly and fixedly arranged on the side wall of the nozzle body, and a rubber sleeve 2 is fixedly sleeved on the outer wall of each of the bearing rods 2 and on the outer wall of the long through hole.

3. The automatic compensation device for concentricity error of a nozzle of a packaging placement machine according to claim 1, characterized in that: The structure of the supporting tube 1 is the same as that of the supporting tube 2. The supporting tube 1 is used to provide support and space for the operation of the camera assembly and the correction mechanism 1.

4. The automatic compensation device for concentricity error of a nozzle of a packaging placement machine according to claim 1, characterized in that: The camera assembly comprises a camera body and a friction plate evenly fixedly arranged on the top of the camera body, a plurality of bearing rods evenly fixedly arranged on the outer wall of the camera body, and a rubber sleeve fixedly sleeved on the outer wall of the bearing rod.

Images