Positioning jig for batch welding of circuit boards

Abstract

The utility model discloses a positioning jig for batch welding of circuit boards, which comprises a positioning base, a plurality of circuit board positioning grooves are arranged on the positioning base, a first end of each circuit board positioning groove is provided with a guide horn mouth, and a second end, opposite to the first end, of each circuit board positioning groove is provided with a lifting limiting piece; an adsorption device is arranged on the groove bottom surface of the circuit board positioning groove, a lifting positioning device is arranged above the top of the circuit board positioning groove, the lifting positioning device comprises at least one positioning part used for pressing a circuit board downwards, and an avoiding area is arranged on the positioning part corresponding to the welding position of the circuit board; the multi-degree-of-freedom positioning device can perform stable multi-degree-of-freedom positioning on a plurality of circuit boards at one time, and meanwhile, reserves enough welding space for subsequent welding operation, so that the circuit boards can be quickly and efficiently welded.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit board welding positioning, and relates to a positioning fixture for batch welding circuit boards. Background Art

[0002] There are numerous soldering locations for pins and wiring on the circuit board, and soldering operations need to be performed at these soldering locations. In order to position the circuit board during the soldering process, a positioning jig is usually used in the prior art to position the circuit board. The existing positioning jig usually sets corresponding positioning pins corresponding to the positioning holes on the circuit board, and then aligns the positioning holes on the circuit board with the positioning pins, and then places the circuit board on the positioning jig. However, the positioning efficiency of the positioning method in which the positioning holes and the positioning pins correspond to each other is low. There is also a positioning method in the existing positioning jig that uses a downward pressure device to press the circuit board, which has a high positioning efficiency. However, the positioning method of pressing the circuit board by a downward pressure device has the defect of insufficient positioning freedom restriction, and the circuit board may still move on the horizontal plane. In addition, the existing circuit board positioning jig usually has only one workstation, and can only perform soldering processing on one circuit board at a time, which seriously reduces the soldering processing efficiency of the circuit board.

[0003] Therefore, in view of the above-mentioned technical problems existing in the existing jigs for welding circuit boards, the utility model discloses a positioning jig for batch welding circuit boards. Utility Model Content

[0004] The purpose of the utility model is to provide a positioning fixture for batch welding of circuit boards, which can stably position a number of circuit boards with multiple degrees of freedom at one time, and at the same time reserve sufficient welding space for subsequent welding operations, so as to quickly and efficiently perform welding operations on the circuit boards.

[0005] The utility model is realized by the following technical solutions:

[0006] A positioning fixture for batch welding of circuit boards comprises a positioning base, on which a plurality of circuit board positioning grooves are arranged, a first end of the circuit board positioning groove is provided with a guide bell mouth, and a second end of the circuit board positioning groove opposite to the first end is provided with a lifting limiter; an adsorption device is provided on the groove bottom surface of the circuit board positioning groove, and a lifting positioning device is provided above the top of the circuit board positioning groove, the lifting positioning device comprises at least one positioning portion for pressing the circuit board downward, and an avoidance area is provided on the positioning portion corresponding to the welding position of the circuit board.

[0007] The circuit board to be welded is moved from the guide bell mouth at the first end of the circuit board positioning groove to the inside of the circuit board positioning groove by a manipulator or a conveyor belt until one end of the circuit board contacts the lifting and limiting member at the second end of the circuit board positioning groove, and the position of the circuit board in the circuit board positioning groove is limited by the lifting and limiting member. Then, the bottom of the circuit board is fixed by the adsorption device at the bottom of the circuit board positioning, and the circuit board can be pressed downward into the inside of the circuit board positioning groove by the lifting and positioning device. At the same time, an avoidance area is reserved on the positioning part of the lifting and positioning device corresponding to the welding position of the circuit board, so that the welding device can weld the welding position on the circuit board.

[0008] After the circuit board is welded, the lifting and positioning device rises and no longer presses the circuit board, and the adsorption device stops and no longer adsorbs the circuit board, and the lifting and limiting member descends to open the second end of the circuit board positioning groove, so that the robot or conveyor belt can easily take out the welded circuit board from the second end of the circuit board positioning groove. By arranging a plurality of circuit board positioning grooves on the positioning base, it is possible to realize synchronous positioning and welding operations on a plurality of circuit boards, and realize batch and quick welding processing of circuit boards.

[0009] In order to better realize the utility model, further, the lifting and limiting component includes a limit block, a cam, and a limit motor. A lifting groove is provided at the second end of the circuit board positioning groove. A limit block is slidably arranged in the lifting groove. A cam is provided in contact with the bottom of the limit block. The wheel axle of the cam is connected to the output end of the limit motor.

[0010] In order to better implement the present invention, further, a limiting portion is provided on one side of the limiting stopper close to the circuit board positioning groove corresponding to the limiting position on the circuit board.

[0011] In order to better realize the utility model, further, the limiting portion includes any one of a limiting groove, a limiting bayonet, a limiting pin, and a limiting synapse.

[0012] In order to better realize the utility model, further, the lifting and positioning device includes a lifting base, a lifting cylinder, and a positioning press. The lifting base is arranged above the positioning groove of the circuit board, the top of the lifting base is connected to the push rod of the lifting cylinder, and the bottom of the lifting base is detachably clamped with a positioning press. An avoidance area is arranged on the bottom surface of the positioning press corresponding to the welding position on the circuit board.

[0013] In order to better realize the utility model, further, a positioning pin is provided on the bottom surface of the positioning press corresponding to the positioning hole on the circuit board, and a flexible contact is provided on the bottom surface of the positioning press corresponding to the positioning surface on the circuit board.

[0014] In order to better implement the present invention, further, a pressure rod is provided on the bottom surface of the positioning press corresponding to the wiring position on the circuit board.

[0015] In order to better realize the utility model, further, the adsorption device includes a magnetic adsorption device or a vacuum adsorption device.

[0016] In order to better implement the present invention, further, an in-position detection switch is provided inside the second end of the circuit board positioning groove.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] (1) The utility model can realize the positioning of several circuit boards at one time and the subsequent welding processing by arranging a plurality of circuit board positioning grooves on the positioning base, which significantly improves the welding processing efficiency of the circuit boards;

[0019] (2) The utility model provides a trumpet-shaped opening at the first end of the circuit board positioning groove for guiding, thereby ensuring that the circuit board can smoothly enter the interior of the circuit board positioning groove; at the same time, a lifting limiter is provided at the second end of the circuit board positioning groove, and the lifting limiter is raised to limit the circuit board, and the lifting limiter is lowered to open the second end for quick removal of the circuit board, thereby ensuring the stability of the circuit board during the processing and facilitating quick transfer of the circuit board after the processing is completed;

[0020] (3) The utility model provides an adsorption device at the bottom of the circuit board positioning groove to adsorb and fix the circuit board, thereby effectively preventing the circuit board from moving. At the same time, a lifting and positioning device is provided at the top of the circuit board positioning groove to press down the circuit board to fix it, thereby further positioning and fixing the circuit board. At the same time, an avoidance area is provided on the positioning portion corresponding to the welding position on the circuit board to reserve space for subsequent welding, thereby ensuring that the circuit board welding operation is carried out quickly and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the positioning fixture;

[0022] Figure 2 This is a schematic diagram of the installation of the lifting limiter;

[0023] Figure 3 A top view of the positioning fixture;

[0024] Figure 4 for Figure 3 AA section view;

[0025] Figure 5 It is a structural schematic diagram of the lifting and positioning device.

[0026] Among them: 1-positioning base; 2-circuit board positioning groove; 3-guide horn mouth; 4-lifting limiter; 5-adsorption device; 6-lifting positioning device; 41-limit block; 42-cam; 43-limit motor; 61-lifting base; 62-lifting cylinder; 63-positioning press. DETAILED DESCRIPTION

[0027] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the utility model explicitly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0030] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and so on in the present utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0031] Embodiment 1:

[0032] A positioning fixture for batch welding circuit boards in this embodiment, such as Figure 1-Figure 4As shown, it includes a positioning base 1, on which a plurality of circuit board positioning grooves 2 are arranged, a first end of the circuit board positioning groove 2 is provided with a guide bell mouth 3, and a second end of the circuit board positioning groove 2 opposite to the first end is provided with a lifting limiter 4; an adsorption device 5 is provided on the bottom surface of the circuit board positioning groove 2, and a lifting positioning device 6 is provided above the top of the circuit board positioning groove 2, and the lifting positioning device 6 includes at least one positioning portion for pressing the circuit board downward, and an avoidance area is provided on the positioning portion corresponding to the welding position of the circuit board.

[0033] like Figure 1 As shown, three circuit board positioning grooves 2 are arranged in sequence from left to right on the positioning base 1 to synchronously perform positioning welding processing on three groups of circuit boards. A manipulator or a conveyor belt is correspondingly arranged at the first end of each circuit board positioning groove 2 to move the processed circuit board to the inside of the circuit board positioning groove 2, and in order to ensure that the circuit board can smoothly enter the inside of the circuit board positioning groove 2, a guide bell mouth 3 is arranged at the first end of the circuit board positioning groove 2, and the width of the guide bell mouth 3 is greater than the width of the circuit board positioning groove 2, and the width of the circuit board positioning groove 2 is equal to or slightly greater than the width of the circuit board, and the above-mentioned slightly greater means that the width of the circuit board positioning groove 2 is 1mm-2mm greater than the width of the circuit board.

[0034] The second end of the circuit board positioning groove 2 refers to the end opposite to the first end. The second end of the circuit board positioning groove 2 is provided with a lifting limiter 4. When the lifting limiter 4 is lifted, the second end of the circuit board positioning groove 2 is blocked and closed, so as to limit the circuit board inside the circuit board positioning groove 2. When the lifting limiter 4 is lowered, the second end of the circuit board positioning groove 2 is opened, so as to facilitate the robot or conveyor belt to take out the circuit board from the second end after the welding process of the circuit board is completed.

[0035] The positioning welding process of the circuit board is as follows:

[0036] Step A, moving a plurality of circuit boards into the circuit board positioning groove 2 by a manipulator or a transmission belt until one end of the circuit board contacts and stops the lifting phase member 4;

[0037] Step B, the adsorption device 5 at the bottom of the circuit board positioning groove 2 is started to adsorb and fix the circuit board inside the circuit board positioning groove 2 to prevent the circuit board positioning groove 2 from moving during subsequent processing;

[0038] Step C, the lifting and positioning device 6 is pressed down, so that the positioning part presses the circuit board tightly inside the circuit board positioning groove 2, so as to achieve complete positioning of the circuit board, and at the same time, an avoidance area is reserved on the positioning part corresponding to the welding position of the circuit board, and the avoidance area can be an avoidance hole, an avoidance slot, etc.;

[0039] Step D, welding the welding position of the circuit board by using a mobile welding device, and at the same time, the avoidance area on the positioning part limits the welding range of the mobile welding device to avoid over-welding;

[0040] Step E, after the circuit board is welded, the lifting and positioning device 6 is lifted up and no longer presses the circuit board, and at the same time the adsorption device 5 stops and no longer adsorbs the circuit board, and the lifting and limiting member 4 descends to open the second end of the circuit board positioning groove 2, at which time the circuit board can be taken out of the circuit board positioning groove 2 by a robot or a conveyor belt.

[0041] Embodiment 2:

[0042] A positioning fixture for batch welding circuit boards, improved on the basis of Example 1, such as Figure 4 As shown, the lifting and limiting member 4 includes a limiting block 41, a cam 42, and a limiting motor 43. A lifting and limiting groove is provided at the second end of the circuit board positioning groove 2. A limiting block 41 is slidably provided in the lifting and limiting groove. A cam 42 is provided at the bottom contacting the limiting block 41. The wheel axle of the cam 42 is connected to the output end of the limiting motor 43.

[0043] A protrusion is provided at the bottom of the limit stopper 41, and the protrusion contacts the wheel rim of the cam 42. The cam 42 is driven to rotate by the limit motor 43, and the limit stopper 41 is driven to slide inside the lifting groove by the change of the wheel diameter of the cam 42 to realize the lifting and lowering of the limit stopper 41.

[0044] Furthermore, a limiting portion is provided on one side of the limiting block 41 close to the circuit board positioning groove 2 corresponding to the limiting position on the circuit board, and the limiting portion includes any one of a limiting groove, a limiting bayonet, a limiting pin, and a limiting contact. The specific structure and position of the limiting portion correspond to the shape and position of the limiting position on the circuit board.

[0045] For example, if the limiting position on the circuit board is a limiting hole, the limiting part is set to a limiting pin corresponding to its position and plugged into the limiting hole; for example, if the limiting position on the circuit board is a limiting groove, the limiting part is set to a limiting protrusion corresponding to its position and docked with the limiting groove.

[0046] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0047] Embodiment 3:

[0048] A positioning fixture for batch welding circuit boards, improved on the basis of embodiment 1 or 2, such as Figure 5As shown, the lifting and positioning device 6 includes a lifting base 61, a lifting cylinder 62, and a positioning press 63. The lifting base 61 is arranged above the circuit board positioning groove 2, and the top of the lifting base 61 is connected to the push rod of the lifting cylinder 62. The bottom of the lifting base 61 is detachably clamped with the positioning press 63, and an avoidance area is arranged on the bottom surface of the positioning press 63 corresponding to the welding position on the circuit board.

[0049] The lifting cylinder 62 is installed above the circuit board positioning groove 2 through a vertical gantry. The push rod end of the lifting cylinder 62 is connected to the top of the lifting base 61. The bottom of the lifting base 61 is detachably connected to the positioning press 63 through a clamp, so that different specifications of positioning presses 63 can be easily replaced corresponding to circuit boards of different specifications.

[0050] The lifting base 61 is lowered by the lifting cylinder 62, so that the positioning press 63 at the bottom of the lifting base 61 presses the top surface of the circuit board. At the same time, an avoidance area is provided on the positioning press 63 corresponding to the welding position on the circuit board to reserve enough space for the mobile welding device to weld the circuit board.

[0051] Furthermore, a positioning pin is provided on the bottom surface of the positioning press 63 corresponding to the positioning hole on the circuit board, and a flexible contact is provided on the bottom surface of the positioning press 63 corresponding to the positioning surface on the circuit board.

[0052] Furthermore, a pressing rod is provided on the bottom surface of the positioning press 63 corresponding to the wiring position on the circuit board.

[0053] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0054] Embodiment 4:

[0055] A positioning fixture for batch welding circuit boards, improved on the basis of any one of embodiments 1-3, wherein the adsorption device 5 comprises a magnetic adsorption device or a vacuum adsorption device. The circuit surface (i.e., the relatively flat surface) of the circuit board has an area greater than or equal to 40 cm 2 When the circuit surface (i.e. the relatively flat surface) of the circuit board is less than 40cm 2 Or when there are concave-convex changes, a magnetic adsorption device is preferred.

[0056] The other parts of this embodiment are the same as any one of Embodiments 1-3, so they are not described again.

[0057] Embodiment 5:

[0058] A positioning jig for batch welding circuit boards, improved on the basis of any one of embodiments 1-4, wherein a position detection switch is provided inside the second end of the circuit board positioning groove 2, and after the circuit board enters the circuit board positioning groove 2, one end of the circuit board contacts the lifting limiter 4, and at this time, the position detection switch is used to detect whether the circuit board contacts the position. If the contact is in place, the position detection switch sends a first signal to an external controller, and the external controller controls the adsorption device 5 and the lifting positioning device 6 to perform corresponding actions; if the contact is not in place, the position detection switch sends a second signal to the external controller, and the external controller controls the alarm device to alarm the corresponding workstation.

[0059] The other parts of this embodiment are the same as any one of Embodiments 1-4, so they are not described again.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A positioning fixture for batch welding of circuit boards, comprising a positioning base (1), wherein a plurality of circuit board positioning grooves (2) are arranged in an array on the positioning base (1), characterized in that: The first end of the circuit board positioning groove (2) is provided with a guide bell mouth (3), and the second end of the circuit board positioning groove (2) opposite to the first end is provided with a lifting limiter (4); an adsorption device (5) is provided on the groove bottom surface of the circuit board positioning groove (2), and a lifting positioning device (6) is provided above the top of the circuit board positioning groove (2), and the lifting positioning device (6) comprises at least one positioning portion for pressing the circuit board downward, and a avoidance area is provided on the positioning portion corresponding to the welding position of the circuit board.

2. A positioning jig for batch welding circuit boards according to claim 1, characterized in that: The lifting and limiting member (4) comprises a limiting block (41), a cam (42), and a limiting motor (43); a lifting and limiting slot is provided at the second end of the circuit board positioning slot (2); a limiting block (41) is slidably provided in the lifting and limiting slot; a cam (42) is provided at the bottom of the limiting block (41) in contact with the limiting block; and a wheel shaft of the cam (42) is connected to an output end of the limiting motor (43).

3. A positioning jig for batch welding circuit boards according to claim 2, characterized in that: A limiting portion is provided on one side of the limiting stopper (41) close to the circuit board positioning groove (2) and corresponding to a limiting position on the circuit board.

4. A positioning jig for batch welding circuit boards according to claim 3, characterized in that: The limiting portion includes any one of a limiting groove, a limiting bayonet, a limiting pin, and a limiting synapse.

5. A positioning jig for batch welding circuit boards according to any one of claims 1 to 4, characterized in that: The lifting and positioning device (6) comprises a lifting base (61), a lifting cylinder (62), and a positioning press (63); the lifting base (61) is arranged above the circuit board positioning groove (2); the top of the lifting base (61) is connected to the push rod of the lifting cylinder (62); the bottom of the lifting base (61) is detachably mounted with the positioning press (63); and a avoidance area is arranged on the bottom surface of the positioning press (63) corresponding to the welding position on the circuit board.

6. A positioning jig for batch welding circuit boards according to claim 5, characterized in that: A positioning pin is provided on the bottom surface of the positioning press (63) corresponding to the positioning hole on the circuit board, and a flexible contact is provided on the bottom surface of the positioning press (63) corresponding to the positioning surface on the circuit board.

7. A positioning jig for batch welding circuit boards according to claim 6, characterized in that: A pressing rod is provided on the bottom surface of the positioning press (63) corresponding to the wiring position on the circuit board.

8. A positioning jig for batch welding circuit boards according to any one of claims 1 to 4, characterized in that: The adsorption device (5) comprises a magnetic adsorption device or a vacuum adsorption device.

9. A positioning jig for batch welding circuit boards according to any one of claims 1 to 4, characterized in that: A position detection switch is arranged inside the second end of the circuit board positioning groove (2).

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