Automatic dispensing machine for SMT (Surface Mount Technology) process

Abstract

The utility model discloses an automatic dispensing machine for SMT (Surface Mount Technology) process, which comprises a machine table and a controller, the machine table is provided with a conveying mechanism, a dispensing mechanism and a calibration glue cleaning nozzle mechanism, and two ends of the conveying mechanism are respectively connected with an upper computer and a lower computer; the glue dispensing mechanism is connected with the conveying mechanism and is used for injecting glue onto the to-be-processed product on the conveying mechanism; the calibration glue cleaning nozzle mechanism comprises a weighing assembly and a glue cleaning nozzle assembly, a glue injection nozzle is arranged at the output end of the glue dispensing mechanism, the glue dispensing mechanism can drive the glue injection nozzle to be connected with the weighing assembly and the glue cleaning nozzle assembly, the weighing assembly is used for weighing the glue injection amount of the glue injection nozzle, and the glue cleaning nozzle assembly is used for dredging the glue injection nozzle. According to the automatic feeding and discharging device, automatic feeding and discharging can be achieved, the glue injection amount of the dispensing machine can be automatically weighed and checked, the glue injection nozzle can be automatically dredged when being blocked, the automation degree of equipment is improved, the labor cost is reduced, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment for automated processing, and particularly relates to an automatic dispensing machine for SMT process. Background Art

[0002] A dispensing machine is a commonly used processing device with a very wide range of applications. In the field of SMT (Surface Mount Technology), the dispensing machine is mainly used for dispensing and curing chip electronic components in a PCB board, that is, a special glue is pre-applied at the positions on the PCB board where components need to be mounted to fix the surface-mounted components, and then through-hole reflow soldering is performed after curing. The purpose is to reduce the failure probability of components due to factors such as thermal cycling, dropping, and vibration during product use, thereby extending the service life of the product.

[0003] Currently, existing dispensing machines usually still use manual loading and unloading. The operator places the product to be dispensed at the dispensing position of the dispensing machine and takes out the product after the dispensing machine finishes processing, resulting in the need for an operator for each device, increasing the labor cost. On the other hand, since the glue is sticky, there is a possibility of clogging the dispensing nozzle of the dispensing machine. Therefore, the dispensing machine needs to weigh and calibrate the glue output every once in a while to ensure the processing stability of the dispensing machine. However, existing dispensing machines lack corresponding calibration devices. Usually, the operator manually takes out the dispensed glue once and takes it to an external weighing device for weighing and calibration. If the dispensing nozzle is clogged, manual cleaning is also used. Summary of the Utility Model

[0004] To solve some or all of the problems existing in the above prior art, the utility model provides an automatic dispensing machine for SMT process, which includes a machine platform and a controller. A conveying mechanism, a dispensing mechanism, and a calibration and nozzle cleaning mechanism are arranged on the machine platform and are respectively connected to the controller. Both ends of the conveying mechanism are respectively connected to a host computer and a slave computer. The conveying mechanism can convey the product to be processed transported by the host computer to the processing position and convey the processed product to the slave computer. The dispensing mechanism is connected to the conveying mechanism and is used to inject glue onto the product to be processed on the conveying mechanism. The calibration and nozzle cleaning mechanism includes a weighing component and a nozzle cleaning component. A dispensing nozzle is arranged at the output end of the dispensing mechanism. The dispensing mechanism can drive the dispensing nozzle to be respectively connected to the weighing component and the nozzle cleaning component. The weighing component is used to weigh the glue output of the dispensing nozzle, and the nozzle cleaning component is used to dredge the dispensing nozzle.

[0005] As a further improvement of the present utility model, the calibration glue cleaning nozzle mechanism includes a calibration mounting frame, the weighing assembly and the glue cleaning nozzle assembly are respectively connected to the calibration mounting frame, the weighing assembly includes an electronic scale, the electronic scale is connected to the calibration mounting frame, the electronic scale is connected to the controller, a cup groove is provided on the calibration mounting frame, the cup groove is used for placing a weighing measurement cup, and the dispensing mechanism can drive the injection nozzle to be connected to the cup groove.

[0006] As a further improvement of the present utility model, the glue cleaning nozzle assembly includes a wiping member and a vacuum suction head provided on the calibration mounting frame, the wiping member is detachably connected to the calibration mounting frame, the vacuum suction head is externally connected to a negative pressure device, and the dispensing mechanism can drive the injection nozzle to be respectively connected to the wiping member and the vacuum suction head.

[0007] As a further improvement of the present utility model, a calibration mounting block is provided on the calibration mounting frame, a height calibration block and a horizontal calibration block are provided on the calibration mounting block, the dispensing mechanism can drive the injection nozzle to be respectively connected to the height calibration block and the horizontal calibration block, the height calibration block is used for calibrating the horizontal height of the injection nozzle, and the horizontal calibration block is used for calibrating the horizontal movement distance of the injection nozzle.

[0008] As a further improvement of the present utility model, the conveying mechanism includes a first conveying frame and a second conveying frame, the first conveying frame and the second conveying frame are respectively connected to the machine table, conveyor belts are respectively provided on the first conveying frame and the second conveying frame, and the two conveyor belts are arranged in parallel, a conveying drive motor is provided on the first conveying frame and / or the second conveying frame, and the output end of the conveying drive motor is connected to the conveyor belt.

[0009] As a further improvement of the present utility model, a blocking cylinder is provided on the first conveying frame and / or the second conveying frame, a blocking block is provided at the output end of the blocking cylinder, the blocking cylinder can drive the blocking block to move up and down, and the blocking block is used to prevent the products on the conveyor belt from flowing.

[0010] As a further improvement of the present utility model, an adjusting mechanism for adjusting the distance between the first conveying frame and the second conveying frame is provided on the machine table, the adjusting mechanism includes an adjusting mounting block, an adjusting motor and an adjusting lead screw are provided on the adjusting mounting block, the adjusting lead screw is rotatably connected to the adjusting mounting block, the output end of the adjusting motor is connected to the adjusting lead screw, an adjusting slider is sleeved on the adjusting lead screw, the adjusting slider is connected to the second conveying frame, an adjusting guide rail is provided on the machine table, and the second conveying frame is slidably clamped with the adjusting guide rail.

[0011] As a further improvement of the present utility model, a product positioning mechanism is provided on the machine table. The product positioning mechanism is connected to the conveying mechanism and is used to limit the product to be processed at the processing position on the conveying mechanism. The product positioning mechanism includes a positioning mounting plate, on which a positioning cylinder and a positioning guide rod are provided. The other end of the positioning guide rod is connected to the first conveying rack and / or the second conveying rack. A positioning clamp block is provided on the output end of the positioning cylinder. The positioning clamp block is slidably sleeved on the positioning guide rod. A clamping plate is provided on the first conveying rack and / or the second conveying rack, and the clamping plate is arranged directly above the positioning clamp block. The positioning cylinder can drive the positioning clamp block to move in a direction close to or away from the clamping plate.

[0012] As a further improvement of the present utility model, the dispensing mechanism includes a three-dimensional driving module, which is connected to the machine table. A glue injection cylinder and an optical positioning component are provided on the output end of the three-dimensional driving module. The glue injection cylinder is externally connected to a glue extrusion device. The optical positioning component is used to capture the product image at the processing position on the conveying mechanism. The glue injection nozzle is connected to the glue injection cylinder.

[0013] As a further improvement of the present utility model, the optical positioning component includes a CCD camera and a supplementary light. The supplementary light and the CCD camera are respectively connected to the controller. The supplementary light is used to illuminate the product on the conveying mechanism, and the CCD camera can capture the product image on the conveying mechanism.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The present utility model can realize automatic loading and unloading of the dispensing machine, can automatically weigh and calibrate the glue injection amount of the dispensing machine, and can also automatically dredge the glue injection nozzle when it is blocked, greatly improving the automation degree of the equipment, reducing manual participation, lowering the labor cost, and improving the processing efficiency. During operation, the upper computer will transport the product to be processed onto the conveying mechanism, control the conveying mechanism to transport the product to be processed to the processing position, and then control the dispensing mechanism to work to inject glue into the glue injection positions on the product to be processed on the conveying mechanism in sequence, so as to complete the dispensing operation of the product. Then, control the conveying mechanism to send out the processed product and transport it to the lower computer to complete the unloading. When it is necessary to weigh and calibrate the glue injection amount of the glue injection nozzle, only need to control the dispensing mechanism to drive the glue injection nozzle to the weighing component and inject glue onto the weighing component, and the weighing component can weigh the glue. If the weighing is insufficient and it is necessary to dredge the glue injection nozzle, only need to control the dispensing mechanism to drive the glue injection nozzle to the corresponding position of the glue cleaning nozzle assembly, and control the glue cleaning nozzle assembly to dredge the glue injection nozzle. Description of the Drawings

[0016] To more clearly illustrate the solutions in the present utility model or the prior art, the following will give a brief introduction to the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a schematic diagram of the external structure of an embodiment of the present utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of an embodiment of the present utility model;

[0019] Figure 3 is a schematic diagram of the internal structure of an embodiment of the present utility model from another perspective;

[0020] Figure 4 is a schematic diagram of the structure of the dispensing mechanism in an embodiment of the present utility model;

[0021] Figure 5 is a schematic diagram of the structure of the conveying mechanism in an embodiment of the present utility model;

[0022] Figure 6 is a schematic diagram of the structure of the product positioning mechanism in an embodiment of the present utility model;

[0023] Figure 7 is a schematic diagram of the structure of the calibration and cleaning nozzle mechanism in an embodiment of the present utility model. Detailed implementation manners

[0024] Unless otherwise defined, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs; the terms used in the description are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the description and claims of the present utility model and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of the present utility model or the above drawings are used to distinguish different objects and are not used to describe a specific order.

[0025] Referring to "embodiment" in the present utility model means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present utility model. The appearance of this phrase in various positions in the description does not necessarily refer to the same embodiment, nor is it an exclusive, independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present utility model can be combined with other embodiments.

[0026] To enable those skilled in the art of this technology to better understand the solution of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0027] As Figures 1-7 shown, an automatic dispensing machine for SMT process includes a machine table 1 and a controller 2. A conveying mechanism 3, a dispensing mechanism 4, and a calibration and cleaning nozzle mechanism 5 are provided on the machine table 1 and are respectively connected to the controller 2. Both ends of the conveying mechanism 3 are connected to the upper computer and the lower computer. The conveying mechanism 3 can receive the products to be processed transported by the upper computer, and transport the products to be processed to the processing position to complete loading. After the processing is completed, the conveying mechanism 3 can also transport the processed products to the lower computer; depending on the different products to be processed, some products may be dispensed after SMT chip mounting, in which case the upper computer is an SMT mounter; some products may also be dispensed first and then SMT chip mounted, in which case the lower computer is an SMT mounter.

[0028] The dispensing mechanism 4 is connected to the conveying mechanism 3 and is used for dispensing the products on the conveying mechanism 3. During specific processing, the products to be processed are transported to the conveying mechanism 3 by the upper computer, and then the conveying mechanism 3 is controlled to work to transport the products to be processed to the processing position to complete loading; then the dispensing mechanism 4 is controlled to work to perform a dispensing operation on the products on the conveying mechanism 3; after the dispensing is completed, the conveying mechanism 3 is controlled to send the processed products to the lower computer to complete unloading. Through the transmission of the conveying mechanism 3, automatic loading and unloading are realized, eliminating the need for manual picking and placing, reducing labor costs, and improving processing efficiency.

[0029] The calibration and cleaning nozzle mechanism 5 includes a weighing component and a cleaning nozzle component. A glue injection nozzle 41 is provided at the output end of the dispensing mechanism 4. The dispensing mechanism 4 can drive the glue injection nozzle 41 to be respectively connected to the weighing component and the cleaning nozzle component. The weighing component is used for weighing the glue injection amount of the glue injection nozzle 41, and the cleaning nozzle component is used for dredging the glue injection nozzle 41. During the processing, it is inevitable that the glue injection nozzle 41 will become blocked. Therefore, this automatic dispensing machine usually needs to weigh and calibrate the glue injection amount of the glue injection nozzle 41 after processing for a period of time to ensure the stability of processing. The specific calibration interval can be preset through the controller 2. When it is necessary to weigh and calibrate the glue injection amount of the glue injection nozzle 41, only need to control the dispensing mechanism 4 to drive the glue injection nozzle 41 to the weighing component, and then control the dispensing mechanism 4 to work, so that the glue injection nozzle 41 injects glue onto the weighing component, and the weighing component can weigh the glue. If it is found that the glue injection amount is insufficient (the glue weight does not meet the expectation) and the glue injection nozzle 41 needs to be dredged, only need to control the dispensing mechanism 4 to drive the glue injection nozzle 41 to move to the corresponding position of the cleaning nozzle component, and control the cleaning nozzle component to dredge the glue injection nozzle 41.

[0030] The automatic dispensing machine can weigh and calibrate the amount of glue injected by the glue injection nozzle 41, and can also automatically dredge the glue injection nozzle 41, reducing manual participation, thereby reducing labor costs and improving processing efficiency.

[0031] As Figure 1 shown, a protective cover 6 is provided on the machine table 1. The protective cover 6 is sleeved around the periphery of the conveying mechanism 3, the dispensing mechanism 4 and the calibration and cleaning glue nozzle mechanism 5, and is fixedly connected to the machine table 1; by covering the conveying mechanism 3, the dispensing mechanism 4 and the calibration and cleaning glue nozzle mechanism 5 with the protective cover 6, the safety of the processing of the automatic dispensing machine can be improved, and the possibility of harm to the operator's body during the operation of the equipment can be eliminated; at the same time, the protective cover 6 can also reduce the entry of dust and other foreign objects into the equipment processing area, improving the stability of the processing of the automatic dispensing machine. A switchable cover plate 61 is provided at the front end of the protective cover 6. By opening the cover plate 61, it is convenient to repair and maintain the conveying mechanism 3, the dispensing mechanism 4 and the calibration and cleaning glue nozzle mechanism 5 in the equipment. A transparent glass 62 is provided on the cover plate 61. Through the transparent glass 62, it is convenient for the operator to observe the processing situation of the equipment.

[0032] The controller 2 includes a control computer 21 and a plurality of control switches 22. The control switches 22 are installed on the protective cover 6 and can be used to control the corresponding actions of the automatic dispensing machine. The control switches 22 include a start switch, a pause switch, an emergency stop switch, a reset switch, etc. The control computer 21 is connected to the protective cover 6 through a computer mounting bracket 23. The computer mounting bracket 23 can be a bracket that can be telescoped or folded, so as to facilitate the storage of the control computer 21, place it on the side wall of the protective cover 6, reduce the occupied space, and facilitate transportation, handling and use.

[0033] As Figure 4 shown, the dispensing mechanism 4 includes a three-dimensional drive module 42. The three-dimensional drive module 42 is fixedly installed on the machine table 1. The three-dimensional drive module 42 is composed of three motor modules, and existing motor screw modules or motor pulley modules can be used. The structure of the three-dimensional drive module 42 is not limited in the present invention. An injection cylinder 43 and an optical positioning component are provided at the output end of the three-dimensional drive module 42. The three-dimensional drive module 42 can drive the injection cylinder 43 and the optical positioning component to move freely in three-dimensional space, that is, through the cooperation of the three motor modules, the injection cylinder 43 and the optical positioning component can be driven to move forward and backward, left and right, and up and down. Glue is pre-filled in the injection cylinder 43. The injection cylinder 43 is externally connected with a glue extrusion device. The glue injection nozzle 41 is installed at the discharge end of the injection cylinder 43. Through the glue extrusion device, the glue in the injection cylinder 43 can be extruded from the glue injection nozzle 41, thereby realizing dispensing processing and weighing calibration of the glue injection amount. The working principle of the injection cylinder 43 is similar to that of a "syringe", and the glue is extruded from the glue injection nozzle 41 by extrusion.

[0034] The optical positioning component is used to capture the product image at the processing position on the conveying mechanism 3. By capturing the product image with the optical positioning component and sending the image to the controller 2, the three-dimensional driving module 42 can be controlled by the controller 2 to drive the dispensing nozzle 41 to move to the dispensing position on the product, so as to achieve the purpose of accurately dispensing the product.

[0035] Specifically, the optical positioning component includes a CCD camera 44 and a fill light 45. The fill light 45 and the CCD camera 44 are respectively connected to the controller 2. The CCD camera 44 and the fill light 45 are respectively fixedly installed at the output end of the three-dimensional driving module 42. The fill light 45 is used to illuminate the product on the conveying mechanism 3, and the CCD camera 44 can capture the product image on the conveying mechanism 3. During operation, the three-dimensional driving module 42 drives the optical positioning component to move directly above the product on the conveying mechanism 3, and then controls the fill light 45 and the CCD camera 44 to work respectively. The light emitted by the fill light 45 irradiates the product on the conveying mechanism 3, so that the CCD camera 44 can capture a clear image of the product on the conveying mechanism 3 and send the captured image to the controller 2, so that the controller 2 can obtain the dispensing position of the product on the conveying mechanism 3, so as to control the three-dimensional driving module 42 to drive the glue injection cylinder 43 to move directly above the product, and squeeze the glue injection cylinder 43 through an external glue extrusion device, so that the glue flows out of the dispensing nozzle 41 and drops to the dispensing position on the product to complete the dispensing work.

[0036] As Figure 5 shown, the conveying mechanism 3 includes a first conveying frame 31 and a second conveying frame 32. The first conveying frame 31 is fixedly installed on the machine table 1, and the second conveying frame 32 is slidably connected to the machine table 1. Conveyor belts 33 are respectively provided on the first conveying frame 31 and the second conveying frame 32, and the two conveyor belts 33 are arranged in parallel. Conveying drive motors 34 are respectively provided on the first conveying frame 31 and the second conveying frame 32. The conveying drive motors 34 are respectively connected to the controller 2, and the output ends of the conveying drive motors 34 are respectively connected to the corresponding conveyor belts 33 through belt pulleys. During operation, the host computer can convey the product onto the two conveyor belts 33, so that the product is placed stably on the conveyor belts 33. By controlling the two conveying drive motors 34 to work, the corresponding conveyor belts 33 can be respectively driven to move, thereby driving the product to move and conveying the product to the processing position to complete the feeding; after the processing is completed, by controlling the two conveying drive motors 34 to work, the product can be moved to one end of the conveyor belt 33 and sent out to the lower computer on one side of the machine table 1 to complete the discharging.

[0037] In other embodiments, there may also be only one conveying drive motor 34. A transmission lead screw is installed at the output end of the conveying drive motor 34, and two drive pulleys are sleeved on the transmission lead screw, so that the two drive pulleys are respectively connected to a corresponding conveyor belt 33. By controlling the operation of the conveying drive motor 34 to drive the transmission lead screw to rotate, the two conveyor belts 33 can be driven simultaneously to meet the feeding and discharging processing requirements of the automatic dispensing machine.

[0038] In order to limit the product to be processed at the processing position, blocking cylinders 35 are respectively provided on the first conveying frame 31 and the second conveying frame 32. Blocking blocks 36 are respectively provided at the output ends of the blocking cylinders 35. The blocking cylinders 35 can drive the blocking blocks 36 to move up and down. The blocking blocks 36 are used to prevent the products on the conveyor belt 33 from flowing. Specifically, during the feeding process, the blocking cylinder 35 drives the blocking block 36 to rise so that it is higher than the horizontal height of the conveyor belt 33. During the process of the conveying drive motor 34 driving the conveyor belt 33 to drive the product to be fed, when the product to be processed moves to contact the blocking block 36, the blocking block 36 will block the product from continuing to move, indicating that the product to be processed has been transported to the processing position at this time, and then the conveying drive motor 34 is controlled to stop working. After the processing is completed, the blocking cylinder 35 is controlled to drive the blocking block 36 to descend so that it descends to a level lower than the horizontal height of the conveyor belt 33. Then the conveying drive motor 34 is controlled to drive the conveyor belt 33 to send the processed product out of the machine table 1 to complete the discharging. By providing the blocking cylinder 35 and the blocking block 36, the processing position of the product to be processed on the conveyor belt 33 can be accurately positioned, thereby improving the stability of processing.

[0039] In other embodiments, there may also be only one blocking cylinder 35, which can be installed at the processing position on the first conveying frame 31 or the second conveying frame 32, as long as it is ensured that the product on the conveyor belt 33 can be blocked from continuing to flow by driving the blocking block 36 to rise by the blocking cylinder 35.

[0040] Such as Figure 5 、 6As shown in the figure, a product positioning mechanism 7 is provided on the machine table 1. The product positioning mechanism 7 is arranged at the corresponding position of the conveying mechanism 3 and is used to limit the product to be processed at the processing position on the conveying mechanism 3. In this embodiment, the number of the product positioning mechanisms 7 is two, and the two product positioning mechanisms 7 are respectively arranged on the first conveying frame 31 and the second conveying frame 32. Specifically, the product positioning mechanism 7 includes a positioning mounting plate 71. A positioning cylinder 72 and a positioning guide rod 73 are provided on the positioning mounting plate 71. The other end of the positioning guide rod 73 is fixedly connected to the first conveying frame 31 or the second conveying frame 32. A positioning clamp block 74 is provided on the output end of the positioning cylinder 72. The positioning clamp block 74 is sleeved on the positioning guide rod 73 and is slidably connected to the positioning guide rod 73. Clamping plates 75 are respectively provided at the corresponding positions of the first conveying frame 31 and the second conveying frame 32 relative to the positioning clamp block 74. The clamping plates 75 are arranged directly above the positioning clamp block 74. The positioning cylinder 72 can drive the positioning clamp block 74 to move in a direction close to or away from the clamping plate 75. During specific operation, when the conveying mechanism 3 conveys the product to be processed to the processing position, the positioning cylinder 72 is controlled to work, driving the positioning clamp block 74 to rise. The positioning clamp block 74 will contact the bottom surface of the product on the conveyor belt 33 and push the product to rise together until the upper end surface of the product abuts against the clamping plate 75, so as to clamp and fix the product to be processed through the positioning clamp block 74 and the clamping plate 75, so that the dispensing mechanism 4 can perform dispensing processing on the product. After the processing is completed, the positioning cylinder 72 is controlled to reset, driving the positioning clamp block 74 to descend, so that the product is placed back on the conveyor belt 33, and it is sent out of the machine table 1 through the conveyor belt 33 to complete the blanking. By setting the product positioning mechanism 7, the product can be limited and fixed at the processing position on the conveying mechanism 3, avoiding situations such as product displacement during the dispensing operation, and improving the stability and accuracy of the processing.

[0041] In other embodiments, there can also be only one product positioning mechanism 7, which is arranged on the first conveying frame 31 or the second conveying frame 32, as long as it is ensured that the product can be clamped and fixed at the processing position on the conveying mechanism 3 through the product positioning mechanism 7.

[0042] Such as Figure 5As shown in the figure, in order to meet the processing requirements of products of different sizes, an adjustment mechanism 8 for adjusting the distance between the first conveyor frame 31 and the second conveyor frame 32 is provided on the machine table 1. By adjusting the distance between the first conveyor frame 31 and the second conveyor frame 32 through the adjustment mechanism 8, the distance between the two conveyor belts 33 can be adjusted, so that it can be applicable to the processing requirements of products of different sizes, and the versatility of the automatic dispensing machine is improved. Specifically, the adjustment mechanism 8 includes an adjustment mounting block 81, the adjustment mounting block 81 is fixedly connected to the machine table 1, an adjustment motor 82 and an adjustment screw rod 83 are provided on the adjustment mounting block 81, the adjustment screw rod 83 is rotatably connected to the adjustment mounting block 81, the adjustment motor 82 is connected to the controller 2, the output end of the adjustment motor 82 is connected to the adjustment screw rod 83 through a pulley structure, an adjustment slider 84 is sleeved on the adjustment screw rod 83, the adjustment slider 84 is fixedly connected to the second conveyor frame 32, and an adjustment guide rail 85 is provided on the machine table 1, and the second conveyor frame 32 is slidably clamped with the adjustment guide rail 85. When it is necessary to adjust the distance between the first conveyor frame 31 and the second conveyor frame 32, the adjustment motor 82 can be controlled to work to drive the adjustment screw rod 83 to rotate, drive the adjustment slider 84 to slide on the adjustment screw rod 83, and the adjustment slider 84 drives the second conveyor frame 32 to slide on the adjustment guide rail 85, so that the second conveyor frame 32 moves in a direction close to or away from the first conveyor frame 31; after adjusting to the appropriate position, then control the adjustment motor 82 to stop working.

[0043] In this embodiment, the number of the adjustment screw rods 83 and the adjustment guide rails 85 are both two, and the two are arranged in one-to-one correspondence. The two adjustment screw rods 83 are respectively connected to the output end of the adjustment motor 82, so that the two adjustment screw rods 83 can move synchronously; through the two adjustment screw rods 83 and the adjustment guide rails 85, the movement process of the second conveyor frame 32 is more stable, and the stability of the adjustment is improved. In other embodiments, the number of the adjustment screw rods 83 and the adjustment guide rails 85 can also be any other number.

[0044] Such as Figure 7As shown in the figure, the calibration glue cleaning nozzle mechanism 5 includes a calibration mounting bracket 51, which is fixedly installed on the machine table 1. The weighing assembly and the glue cleaning nozzle assembly are respectively installed on the calibration mounting bracket 51. The weighing assembly includes an electronic scale 52, which is electrically connected to the controller 2. The electronic scale 52 is fixedly installed on the calibration mounting bracket 51. A cup groove 53 is provided on the calibration mounting bracket 51, and the cup groove 53 is used to place the weighing measurement cup. The dispensing mechanism 4 can drive the dispensing nozzle 41 to be connected to the cup groove 53. Before weighing calibration, the weighing measurement cup can be placed into the cup groove 53 in advance. When weighing calibration is required, control the dispensing mechanism 4 to drive the dispensing nozzle 41 to move directly above the weighing measurement cup, and then control the dispensing nozzle 41 to extrude glue, and the glue will drip onto the weighing measurement cup. Then the operator can take out the weighing measurement cup from the cup groove 53 and then place it on the electronic scale 52 for weighing. If the weighed weight is within the error range of the preset value, it means that the dispensing nozzle 41 is not blocked, and the automatic dispenser can be controlled to continue working. If the weighed weight is lower than the error range of the preset value, it means that the dispensing nozzle 41 is blocked, and it is necessary to control the dispensing mechanism 4 to drive the dispensing nozzle 41 to move to the glue cleaning nozzle assembly to dredge the dispensing nozzle 41, so as to ensure that an appropriate amount of glue can be extruded in the subsequent dispensing process.

[0045] The glue cleaning nozzle assembly includes a wiping part 54 and a vacuum suction head 55. A wiping mounting block 56 is provided on the calibration mounting bracket 51. The wiping part 54 is installed on the wiping mounting block 56, and the wiping part 54 is detachably connected to the wiping mounting block 56, so as to facilitate the replacement of the wiping part 54. The vacuum suction head 55 is connected to the calibration mounting bracket 51, and a negative pressure device is externally connected to the vacuum suction head 55. The dispensing mechanism 4 can drive the dispensing nozzle 41 to be connected to the wiping part 54 and the vacuum suction head 55 respectively. During specific operation, when the dispensing nozzle 41 needs to be dredged, first control the dispensing mechanism 4 to drive the dispensing nozzle 41 to move onto the wiping part 54, so that the dispensing nozzle 41 rubs against the wiping part, and first wipe off the excess glue on the dispensing nozzle 41 through the wiping part 54. Then control the dispensing mechanism 4 to drive the dispensing nozzle 41 to be connected to the vacuum suction head 55. After that, the negative pressure device externally connected to the vacuum suction head 55 can generate negative pressure suction force on the vacuum suction head 55 in real time, so as to suck out the residual glue inside the dispensing nozzle 41 to achieve the purpose of dredging the dispensing nozzle 41.

[0046] In this embodiment, the wiping part 54 is a sponge adsorbed with alcohol. When the dispensing mechanism 4 drives the dispensing nozzle 41 to rub against the wiping part 54, the wiping part 54 can smear the alcohol onto the dispensing nozzle 41, so as to soften the residual glue on the dispensing nozzle 41, making it easier for the vacuum suction head 55 to suck out the glue inside the dispensing nozzle 41, improving the efficiency and stability of the glue cleaning nozzle.

[0047] A calibration mounting bracket 51 is provided with a calibration mounting block 57. The calibration mounting block 57 is provided with a height calibration block 58 and a horizontal calibration block 59. The dispensing mechanism 4 can drive the dispensing nozzle 41 to be respectively connected with the height calibration block 58 and the horizontal calibration block 59. The height calibration block 58 is used to calibrate the horizontal height of the dispensing nozzle 41, and the horizontal calibration block 59 is used to calibrate the horizontal movement distance of the dispensing nozzle 41. When it is necessary to calibrate the dispensing height of the dispensing nozzle 41, control the dispensing mechanism 4 to drive the dispensing nozzle 41 to move above the height calibration block 58, and control the dispensing nozzle 41 to descend until the dispensing nozzle 41 is connected with the height calibration block 58, which indicates that the height of the dispensing nozzle 41 at this time is the dispensing height of the automatic dispenser; when it is necessary to calibrate the horizontal movement distance of the dispensing nozzle 41, control the dispensing mechanism 4 to drive the dispensing nozzle 41 to move above the height calibration block 58, and control the dispensing nozzle 41 to descend until the dispensing nozzle 41 is connected with the height calibration block 58. The horizontal coordinate information of the current dispensing nozzle 41 can be obtained through the CCD camera 44 on the dispensing mechanism 4. By setting the horizontal calibration block 59 and the height calibration block 58, it is convenient to debug the automatic dispenser and improve the efficiency of machine adjustment.

[0048] Specifically, the height calibration block 58 is movably and limit-connected to the calibration mounting block 57. The calibration mounting block 57 is provided with a contact sensor 510, and the contact sensor 510 is connected to the controller 2. The contact sensor 510 is arranged directly below the height calibration block 58, and the height calibration block 58 can be connected to the contact sensor 510. When calibrating the horizontal height of the dispensing nozzle 41, when the dispensing mechanism 4 drives the dispensing nozzle 41 to descend until it is connected with the height calibration block 58, the dispensing nozzle 41 will appropriately squeeze the height calibration block 58, so that the height calibration block 58 presses down on the contact sensor 510, and the contact sensor 510 feeds back a signal to the controller 2, so that the controller 2 obtains the height data of the current dispensing nozzle 41; so that the controller 2 can accurately control the dispensing height of the dispensing nozzle 41 to be consistent each time, ensuring the consistency and stability of processing.

[0049] The horizontal calibration block 59 is provided with coordinate markings 511. During the calibration of the horizontal movement distance of the dispensing nozzle 41, the dispensing nozzle 41 will move on the coordinate markings 511. By photographing the numerical changes of the coordinate markings 511 corresponding to the dispensing nozzle 41 at various positions through the CCD camera 44, the movement distance of the dispensing nozzle 41 can be calculated, so that the controller 2 can accurately control the horizontal movement distance of the dispensing nozzle 41, ensuring the consistency and stability of processing.

[0050] Working principle:

[0051] Before processing, install this automatic dispenser between the upper computer and the lower computer, and make one end of the conveyor belt 33 connected to the discharging mechanism of the upper computer, and the other end of the conveyor belt 33 connected to the feeding mechanism of the lower computer.

[0052] During processing, the host computer transports the product to be processed onto the conveyor belt 33. Control the blocking cylinder 35 to work, drive the blocking block 36 to rise so that it is higher than the horizontal height of the conveyor belt 33; then control the conveyor drive motor 34 to work, drive the conveyor belt 33 to move, thereby driving the product to move until the side wall of the product abuts against the blocking block 36. At this time, the product to be processed is transported to the processing position of this automatic dispensing machine. Then, control the positioning cylinder 72 to work, drive the positioning clamp block 74 to rise, and the positioning clamp block 74 will contact the bottom surface of the product on the conveyor belt 33 and push the product to rise together until the upper end surface of the product abuts against the clamping plate 75, so as to clamp and fix the product to be processed through the positioning clamp block 74 and the clamping plate 75. Then, control the three-dimensional drive module 42 to drive the glue injection cylinder 43 and the optical positioning component to move above the product to be processed, take a photo of the product to be processed through the CCD camera 44 to obtain the dispensing position, and then control the three-dimensional drive module 42 to drive the glue injection cylinder 43 to move to the dispensing position of the product to be processed. An extrusion device is externally connected to the glue injection cylinder 43, and the glue in the glue injection cylinder 43 is extruded from the glue injection nozzle 41 and dripped onto the dispensing position of the product to be processed to complete the dispensing process.

[0053] After the dispensing is completed, control the positioning cylinder 72 and the blocking cylinder 35 to reset respectively, so that the processed product returns to the conveyor belt 33 again, and the blocking cylinder 35 drives the blocking block 36 to descend to a position lower than the horizontal height of the conveyor belt 33; then control the conveyor drive motor 34 to drive the conveyor belt 33 to move, and send the processed product out to the lower computer on one side of the machine table 1 to complete automatic blanking.

[0054] After processing for a period of time, it is necessary to weigh and calibrate the glue injection volume of the glue injection nozzle 41; first place the weighing measuring cup into the cup slot 53; then control the dispensing mechanism 4 to drive the glue injection nozzle 41 to move directly above the weighing measuring cup, and control the glue injection nozzle 41 to extrude glue, and the glue will drip onto the weighing measuring cup; then the operator can take out the weighing measuring cup from the cup slot 53 and then place it on the electronic scale 52 for weighing. If the weighed weight is within the error range of the preset value, it means that the glue injection nozzle 41 is not blocked, and the automatic dispensing machine can be controlled to continue working; if the weighed weight is lower than the error range of the preset value, it means that the glue injection nozzle 41 is blocked, and the glue injection nozzle 41 needs to be dredged to ensure that an appropriate amount of glue can be extruded during subsequent dispensing processing.

[0055] When it is necessary to dredge the glue injection nozzle 41, the dispensing mechanism 4 is controlled to drive the glue injection nozzle 41 to move onto the wiping member 54, so that the glue injection nozzle 41 rubs against the wiping member, and the excess glue on the glue injection nozzle 41 is first wiped off by the wiping member 54; then the dispensing mechanism 4 is controlled to drive the glue injection nozzle 41 to be connected with the vacuum suction head 55. After that, the negative pressure device externally connected to the vacuum suction head 55 can generate negative pressure suction on the vacuum suction head 55 in real time, so as to suck out the residual glue inside the glue injection nozzle 41, so as to achieve the purpose of dredging the glue injection nozzle 41.

[0056] The above specific implementation manner is the preferred implementation manner of the present invention, and does not limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation manner. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. An automatic dispensing machine for SMT process, characterized in that: It includes a machine platform and a controller. A conveying mechanism, a dispensing mechanism, and a calibration and glue nozzle cleaning mechanism are provided on the machine platform and are respectively connected to the controller. Both ends of the conveying mechanism are respectively connected to an upper computer and a lower computer. The conveying mechanism can convey the products to be processed transported by the upper computer to the processing position and convey the processed products to the lower computer. The dispensing mechanism is connected to the conveying mechanism and is used to inject glue onto the products to be processed on the conveying mechanism. The calibration and glue nozzle cleaning mechanism includes a weighing component and a glue nozzle cleaning component. A glue injection nozzle is provided at the output end of the dispensing mechanism. The dispensing mechanism can drive the glue injection nozzle to be respectively connected to the weighing component and the glue nozzle cleaning component. The weighing component is used to weigh the glue injection amount of the glue injection nozzle, and the glue nozzle cleaning component is used to dredge the glue injection nozzle.

2. The automatic dispensing machine for SMT process according to claim 1, wherein: The calibration and glue nozzle cleaning mechanism includes a calibration mounting frame. The weighing component and the glue nozzle cleaning component are respectively connected to the calibration mounting frame. The weighing component includes an electronic scale. The electronic scale is connected to the calibration mounting frame and is connected to the controller. A cup slot is provided on the calibration mounting frame and is used to place a weighing and measuring cup. The dispensing mechanism can drive the glue injection nozzle to be connected to the cup slot.

3. The automatic dispensing machine for SMT process according to claim 2, wherein: The glue nozzle cleaning component includes a wiping piece and a vacuum suction head provided on the calibration mounting frame. The wiping piece is detachably connected to the calibration mounting frame. The vacuum suction head is externally connected to a negative pressure device. The dispensing mechanism can drive the glue injection nozzle to be respectively connected to the wiping piece and the vacuum suction head.

4. The automatic dispensing machine for SMT process according to claim 2, characterized in that: A calibration mounting block is provided on the calibration mounting frame. A height calibration block and a horizontal calibration block are provided on the calibration mounting block. The dispensing mechanism can drive the glue injection nozzle to be respectively in contact with the height calibration block and the horizontal calibration block. The height calibration block is used to calibrate the horizontal height of the glue injection nozzle, and the horizontal calibration block is used to calibrate the horizontal movement distance of the glue injection nozzle.

5. The automatic dispensing machine for SMT process according to any one of claims 1-4, characterized in that: The conveying mechanism includes a first conveying frame and a second conveying frame. The first conveying frame and the second conveying frame are respectively connected to the machine platform. Conveyor belts are respectively provided on the first conveying frame and the second conveying frame, and the two conveyor belts are arranged parallel to each other. A conveying drive motor is provided on the first conveying frame and / or the second conveying frame, and the output end of the conveying drive motor is connected to the conveyor belt.

6. The automatic dispensing machine for SMT process according to claim 5, wherein: A blocking cylinder is provided on the first conveying frame and / or the second conveying frame. A blocking block is provided at the output end of the blocking cylinder. The blocking cylinder can drive the blocking block to move up and down, and the blocking block is used to prevent the products on the conveyor belt from flowing.

7. The automatic dispensing machine for SMT process according to claim 5, wherein: An adjusting mechanism for adjusting the distance between the first conveying frame and the second conveying frame is provided on the machine platform. The adjusting mechanism includes an adjusting mounting block. An adjusting motor and an adjusting lead screw are provided on the adjusting mounting block. The adjusting lead screw is rotatably connected to the adjusting mounting block. The output end of the adjusting motor is connected to the adjusting lead screw. An adjusting slider is sleeved on the adjusting lead screw. The adjusting slider is connected to the second conveying frame. An adjusting guide rail is provided on the machine platform, and the second conveying frame is slidably clamped with the adjusting guide rail.

8. The automatic dispensing machine for SMT process according to claim 7, wherein: A product positioning mechanism is provided on the machine table. The product positioning mechanism is connected to the conveying mechanism and is used to limit the product to be processed at the processing position on the conveying mechanism. The product positioning mechanism includes a positioning mounting plate. A positioning cylinder and a positioning guide rod are provided on the positioning mounting plate. The other end of the positioning guide rod is connected to the first conveying rack and / or the second conveying rack. A positioning clamp block is provided on the output end of the positioning cylinder. The positioning clamp block is slidably sleeved on the positioning guide rod. Clamping plates are provided on the first conveying rack and / or the second conveying rack, and the clamping plates are arranged directly above the positioning clamp block. The positioning cylinder can drive the positioning clamp block to move in a direction close to or away from the clamping plates.

9. The automatic dispensing machine for SMT process according to any one of claims 1-4 or any one of claims 6-8, characterized in that: The dispensing mechanism includes a three-dimensional driving module. The three-dimensional driving module is connected to the machine table. A glue injection cylinder and an optical positioning component are provided on the output end of the three-dimensional driving module. The glue injection cylinder is externally connected to a glue extrusion device. The optical positioning component is used to capture an image of the product at the processing position on the conveying mechanism. The glue injection nozzle is connected to the glue injection cylinder.

10. The automatic dispensing machine for SMT process according to claim 9, wherein: The optical positioning component includes a CCD camera and a supplementary light. The supplementary light and the CCD camera are respectively connected to the controller. The supplementary light is used to illuminate the product on the conveying mechanism, and the CCD camera can capture an image of the product on the conveying mechanism.

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