A conveying mechanism for a secondary positioning of a frame

Abstract

The application relates to the technical field of PCB production equipment, and discloses a conveying mechanism for secondary positioning of a material frame. The structure comprises a first double-row conveying line, a roller conveying line and a second double-row conveying line which are sequentially connected in the feeding direction. Two flat support feet are arranged at the bottom of the U-shaped material frame. The first double-row conveying line is driven by a double-sided air cylinder to drive an L-shaped push plate to realize first centering positioning. The second double-row conveying line is integrated with a jacking air floating platform and four groups of linkage air cylinders, and the secondary fine positioning is completed in the state of jacking and separating from the conveying line. Through the design of phased positioning and friction isolation, the problem of insufficient positioning accuracy (plus or minus 2 mm) caused by material frame deformation and conveying cumulative error is solved, the positioning accuracy is improved to plus or minus 0.1 mm, and the risk of mechanism jamming or material frame overturning is avoided.

Description

Technical Field

[0001] This application belongs to the technical field of PCB board production equipment, and in particular relates to a conveying mechanism for a secondary positioning material frame. Background Technology

[0002] In automated PCB production lines, the material frame, as a carrier, needs to move between multiple workstations. Traditional conveying mechanisms have the following problems: PCB line widths / spacings have evolved to ≤50μm (e.g., HDI boards), requiring a material frame repeatability accuracy of ≤±0.5mm; existing single-positioning mechanisms (e.g., single-sided cylinder pushing) are affected by material frame deformation and cumulative conveying errors, resulting in actual positioning errors of ±2mm; traditional conveyor lines and material frame structures interfere with each other during secondary positioning, hindering the positioning mechanism's movement, and forced clamping can cause the mechanism to jam or the material frame to tip over. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a conveying mechanism for a secondary positioning material frame in order to overcome the shortcomings of the prior art, and to solve at least one of the above-mentioned technical problems.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A conveying mechanism for a secondary positioning material frame includes a first double-row conveyor line, a roller conveyor line, and a second double-row conveyor line arranged sequentially along the feeding direction; The material frame is configured as a U-shaped structure, and two flat support legs parallel to the material frame wall are provided at the bottom. The outer distance between the two flat support legs is smaller than the inner distance between the first double-row conveyor lines. The first double-row conveyor line is used to support the bottom of the material frame for conveying. The first double-row conveyor line is provided with a first positioning mechanism on both sides for the initial centering and positioning of the material frame. The second double-row conveyor line is used to support the flat plate support legs of the conveying frame to achieve conveying. The second double-row conveyor line is provided with a second positioning mechanism on both sides for secondary centering and positioning of the frame.

[0005] Preferably, in the conveying mechanism of the secondary positioning material frame of the present invention, the first positioning mechanism includes a first push plate parallel to the conveying direction of the material frame and a first cylinder for driving the first push plate to move closer to or away from the material frame.

[0006] Preferably, in the conveying mechanism of the secondary positioning material frame of this utility model, a limiting cylinder is respectively provided on both sides of the starting end of the first double-row conveying line.

[0007] Preferably, in the conveying mechanism of the secondary positioning material frame of this utility model, the second positioning mechanism includes four second cylinders respectively arranged on both sides of the second double-row conveying line near the beginning and end, and the four second cylinders are linked together.

[0008] Preferably, in the conveying mechanism of the secondary positioning material frame of this utility model, a lifting air-floating platform is respectively provided on both sides of the second double-row conveying line. The lifting air-floating platform is used to flexibly lift the bottom of the material frame, so that the flat support foot of the material frame is removed from the second double-row conveying line.

[0009] Preferably, in the secondary positioning material frame conveying mechanism of this utility model, the lifting air flotation platform includes a lifting cylinder, a lifting plate and an air flotation head. The top rod of the lifting cylinder is fixedly connected to the lifting plate and is used to drive the lifting plate to lift and lower. The air flotation head is connected to the lifting plate.

[0010] Preferably, in the conveying mechanism of the secondary positioning material frame of this utility model, the second cylinder is fixedly connected to the lifting plate.

[0011] Preferably, in the conveying mechanism of the secondary positioning material frame of this utility model, both the roller conveyor line and the second double-row conveyor line are provided with limit guide strips for guiding and limiting the plate support feet.

[0012] Preferably, in the conveying mechanism of the secondary positioning material frame of this utility model, the height of the flat plate support foot is greater than the thickness of the first double-row conveying line.

[0013] Preferably, the conveying mechanism of the secondary positioning material frame of this utility model further includes an AGV conveyor vehicle, which is used to lift the material frame and insert it into the first double-row conveyor line.

[0014] The beneficial effects of this utility model are: (1) The first positioning is achieved by pushing the push plate with the double-sided synchronous cylinders to force the material frame to be centered laterally, thus eliminating the cumulative error of AGV feeding; the second positioning is achieved by four sets of linkage cylinders simultaneously clamping the material frame from the four corners after the lifting air flotation platform is removed from the conveyor line, thus avoiding the interference of material frame deformation, and the positioning accuracy can reach ±0.1mm. (2) The bottom flat support feet of the U-shaped material frame are matched with the spacing of the double-row conveyor lines, and the conveying trajectory is constrained by the limit guide strip to prevent deviation; (3) The height of the support leg (25cm) is greater than the thickness of the first conveyor line (20cm) to ensure that there is no structural interference when the AGV is connected; (4) The three-section conveyor line (belt-roller-belt) smoothly transitions through frequency conversion speed regulation, and the limit cylinder and positioning mechanism are linked for control. The cycle time matches the needs of the automated production line, improving the turnover efficiency by more than 30%. Attached Figure Description

[0015] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1These are two sets of structural schematic diagrams of the conveying mechanism in the embodiments of this application; The attached figures are labeled as follows: first double-row conveyor line 10, transitional roller conveyor line 20, and second double-row conveyor line 30; First positioning mechanism 11, limit cylinder 12, limit guide bar 13, second positioning mechanism 31, lifting air-float platform 32; Push plate 111, first cylinder 112, second cylinder 311, lifting cylinder 321, lifting plate 322, air float head 323. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0018] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0020] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0021] This embodiment provides a conveying mechanism for a secondary positioning material frame, referring to... Figure 1Its structure includes a first double-row conveyor line 10 arranged sequentially along the feeding direction, a roller conveyor line 20 connected in transition, and a second double-row conveyor line 30. The three conveyor lines are started and stopped by the control system according to the set program. In this embodiment, in order to facilitate the demonstration of the structure, two sets of parallel conveyor mechanisms are set up. The two sets of conveyor mechanisms have the same structure and asynchronous operation.

[0022] The first double-row conveyor line 10 adopts a belt conveyor line driven by synchronous belts. The spacing between the conveyor belts on both sides is adapted to the width of the material frame. The material frame is conveyed as a whole by friction contact to support the bottom plate of the material frame. The material frame adopts a U-shaped structure design, and two flat support legs parallel to the rectangular cross-section of the side wall of the material frame are welded to the bottom. The two support legs are symmetrically embedded, and their outer sides do not contact or interfere with the inner side of the first double-row conveyor line 10.

[0023] The flat support feet of the material frame are designed to be 25cm high, which provides a safety margin compared to the 20cm thickness of the first double-row conveyor line 10, ensuring that there is no interference during the conveying process.

[0024] The first double-row conveyor line 10 is symmetrically equipped with a first positioning mechanism 11 on both sides. Each first positioning mechanism 11 includes a push plate 111 parallel to the conveying direction, a matching first cylinder 112, a guide rod and a linear bearing for sliding guide support, and the material frame is laterally centered and positioned at the initial station by synchronous drive of the two cylinders.

[0025] Limit cylinders 12 are installed on both sides of the feed end of the first double-row conveyor line 10 to block and limit the material frame transferred by the AGV conveyor vehicle.

[0026] During operation, the configured AGV conveyor lifts the material frame and inserts it into the connection area of ​​the first double-row conveyor line 10. Then, the limit cylinder 12 extends to block and limit the material frame. The first cylinders 112 on both sides extend simultaneously to push the first push plate to push the material frame for the first centering and positioning, and then reset. Then, the AGV conveyor's pallet descends and disengages from the material frame. The bottom plate of the material frame falls on the first double-row conveyor line 10 and moves to the next station.

[0027] After the material frame is initially positioned, it is transferred to the second double-row conveyor line 30 via a frequency-controlled roller conveyor line 20. The roller conveyor line 20 adopts a multi-roller structure, and its working roller surface is flush with the bottom surface of the flat support feet of the material frame.

[0028] The second double-row conveyor line 30 has the same structure as the first double-row conveyor line 10. Its working surface is at the same height and flush with the working roller surface of the roller conveyor line 20, and the spacing between the two belts corresponds to the arrangement dimensions of the material frame plate support legs. The second double-row conveyor line 30 also integrates lifting air-float platforms 32 on both sides. Each platform includes a lifting cylinder 321, a lifting plate 322, a matrix of air-float heads 323, and the necessary linear bearings and guide rod assemblies for the lifting mechanism. When positioning is completed, the lifting cylinder 321 drives the lifting plate 322 to rise vertically by 3-5mm, causing the plate support feet to disengage from the conveyor line. The air-float heads 323 then contact the bottom of the material frame to provide flexible support, completely eliminating frictional resistance from interfering with secondary positioning and preventing impact.

[0029] It is worth noting that the second positioning mechanism 31, which is symmetrically arranged on both sides, includes four sets of second cylinders 311 that are equidistantly distributed. The mounting base of the second cylinder 311 is rigidly connected to the lifting plate 322. After the material frame is lifted and separated from the second double-row conveyor line 30, the four sets of cylinders extend and retract synchronously to complete the secondary precise positioning of the material frame at the terminal.

[0030] Furthermore, both sides of the roller surface of the roller conveyor line 20 and the second double-row conveyor line 30 are fitted with limit guide strips 13. The guide strips are made of ultra-high molecular weight polyethylene material, and their inner guide surfaces can effectively constrain the conveying trajectory of the flat plate support feet.

[0031] Based on the above-described preferred embodiments according to this application, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. The technical scope of this application is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A conveying mechanism for a secondary positioning material frame, characterized in that, It includes a first double-row conveyor line (10), a roller conveyor line (20), and a second double-row conveyor line (30) arranged sequentially along the feeding direction; The material frame is configured as a U-shaped structure, and two flat support legs parallel to the material frame wall are provided at the bottom. The outer distance between the two flat support legs is smaller than the inner distance of the first double-row conveyor line (10). The first double-row conveyor line (10) is used to lift the bottom of the material frame to realize the conveying. The first double-row conveyor line (10) is provided with a first positioning mechanism (11) on both sides for the initial centering and positioning of the material frame. The second double-row conveyor line (30) is used to support the flat support feet of the conveying frame to realize the conveying. The second double-row conveyor line (30) is provided with a second positioning mechanism (31) on both sides for secondary centering and positioning of the frame.

2. The conveying mechanism for a secondary positioning material frame according to claim 1, characterized in that, The first positioning mechanism (11) includes a first push plate (111) parallel to the material frame conveying direction and a first cylinder (112) that drives the first push plate to move closer to or away from the material frame.

3. The conveying mechanism for a secondary positioning material frame according to claim 2, characterized in that, A limit cylinder (12) is also provided on both sides of the starting end of the first double-row conveyor line (10).

4. The conveying mechanism for a secondary positioning material frame according to any one of claims 1-3, characterized in that, The second positioning mechanism (31) includes four second cylinders (311) respectively arranged on both sides of the second double-row conveyor line (30) near the beginning and end, and the four second cylinders (311) are linked together.

5. The conveying mechanism for a secondary positioning material frame according to claim 4, characterized in that, The second double-row conveyor line (30) is also provided with a lifting air flotation platform (32) on both sides. The lifting air flotation platform (32) is used to flexibly lift the bottom of the material frame so that the flat support foot of the material frame is removed from the second double-row conveyor line (30).

6. The conveying mechanism for a secondary positioning material frame according to claim 5, characterized in that, The lifting air flotation platform (32) includes a lifting cylinder (321), a lifting plate (322), and an air flotation head (323). The push rod of the lifting cylinder (321) is fixedly connected to the lifting plate (322) and is used to drive the lifting plate (322) to lift. The air flotation head (323) is connected to the lifting plate (322).

7. The conveying mechanism for a secondary positioning material frame according to claim 6, characterized in that, The second cylinder (311) is fixedly connected to the lifting plate (322).

8. The conveying mechanism for a secondary positioning material frame according to claim 1, characterized in that, Both the roller conveyor line (20) and the second double-row conveyor line (30) are provided with limit guide strips (13) for guiding and limiting the plate support feet.

9. The conveying mechanism for a secondary positioning material frame according to claim 1, characterized in that, The height of the flat plate support foot is greater than the thickness of the first double-row conveyor line (10).

10. A conveying mechanism for a secondary positioning material frame according to claim 1 or 9, characterized in that, It also includes an AGV conveyor vehicle, which is used to lift the material frame and insert it into the first double-row conveyor line (10).

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