A download pin bed and a method and tooling for manufacturing a download pin bed

Abstract

The present invention provides a download pin bed, a method and tooling for manufacturing the download pin bed. The tooling includes a positioning circuit board, magnetic download pins and a bed mold. The positioning circuit board is provided with a plurality of coils, and the center points of the coils are arranged in the same layout as the download point positions of the PCBA to be programmed. The number of magnetic download pins is not less than the number of coils. One end of each magnetic download pin is a magnetic needle head, and the other end is a connector for connecting a signal line. The bed mold includes a frame edge and a bottom plate. A phase change material is contained in the mold cavity formed by the bottom plate and the frame edge, and the bottom plate is detachably connected to the frame edge. By using the tooling provided by the present invention, a download pin bed can be manufactured at low cost and in a short cycle, and the manufactured download pin bed has a high recycling value.

Description

Technical Field

[0001] The present invention relates to the technical field of PCBA program burning, and in particular to a downloading needle bed and a method and tooling for manufacturing the downloading needle bed. Background Art

[0002] The PCBA (printed circuit board assembly) obtained after the PCB (Printed Circuit Board) is mounted using SMT (Surface Mounted Technology) requires program burning. The existing mass production burning method is to design a needle bed based on the download point position of the PCBA product, connect the signal of the burner to the probe of the needle bed, and perform program burning by contacting the download point of the PCBA through the probe. However, the design requirements of each product are different, and the download point position of the PCBA is not uniform. Therefore, the needle bed needs to be designed separately for different products and cannot be reused by other products. At the same time, the current needle bed has a high production cost and a long cycle, and when the corresponding PCBA is no longer produced, the needle bed will be directly scrapped because it cannot be recycled. In summary, how to produce a needle bed at low cost and in a short cycle has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0003] In view of this, the present invention provides a downloading needle bed and a method and tooling for manufacturing the downloading needle bed. The tooling can be used to manufacture the downloading needle bed at low cost and in a short period of time, and the downloading needle bed manufactured thereby has a high recycling value.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A tool for making a needle bed, comprising:

[0006] A positioning circuit board is provided with a plurality of coils, the center points of the coils being arranged in the same layout as the download point position of the PCBA of the program to be burned;

[0007] A plurality of magnetic download pins, the number of which is not less than the number of the coils, one end of each magnetic download pin being a magnetic needle head and the other end being a connector head for connecting a signal line;

[0008] The bed mold comprises a frame edge and a bottom plate. The mold groove surrounded by the bottom plate and the frame edge contains phase change material. The bottom plate is detachably connected to the frame edge.

[0009] Optionally, in the above tooling, the phase change material is in solid state at room temperature.

[0010] Optionally, in the above-mentioned tooling, a clamping device for clamping the positioning circuit board is further included. The clamping device is integrated with a first terminal for energizing the coil. When the clamping device clamps the positioning circuit board, the first terminal is electrically connected to the coil.

[0011] Optionally, in the above-mentioned tooling, a second terminal cooperating with the first terminal is arranged on the side of the positioning circuit board, and the second terminal is electrically connected to the coil.

[0012] Optionally, in the above-mentioned tooling, the bed mold further includes a temperature control module for changing the temperature of the phase change material.

[0013] Optionally, in the above-mentioned tooling, the coil is a planar spiral trace.

[0014] Optionally, in the above-mentioned tooling, one end point of the coil is located at the center point of the coil.

[0015] A method for manufacturing a download needle bed, the method uses the tooling for manufacturing a download needle bed disclosed in any one of the above, and includes the following steps:

[0016] Take the magnetic download needles and place them on the working platform. Suspend the positioning circuit board directly above the magnetic download needles. Energize the coils to generate a magnetic field and make each coil adsorb one of the magnetic download needles;

[0017] Move the positioning circuit board to the bed mold so that the connection heads of the magnetic download needles are immersed in the phase change material which is currently in a liquid state, and then change the phase change material from a liquid state to a solid state;

[0018] Cut off the power supply to the coils or energize them in the reverse direction to separate the positioning circuit board from the magnetic download needles, and remove the bottom plate of the bed mold to expose the connection heads of the magnetic download needles.

[0019] Optionally, in the above method, when adsorbing the magnetic download needles to the positioning circuit board, gently shake the positioning circuit board in the horizontal direction.

[0020] A download needle bed, which is obtained by the method for manufacturing a download needle bed disclosed in any one of the above.

[0021] According to the above technical solution, when making a download pin bed for different PCBA products using the solution provided by the present invention, only the positioning circuit board in the tooling needs to be made separately, and the cost consumed when making a download pin bed by the traditional method is very low, and its production cycle is shorter. Therefore, the tooling provided by the present invention can be used to make a download pin bed at low cost and in a short cycle. In addition, after the program is burned into the PCBA products adapted by the download pin bed made by the solution provided by the present invention, the magnetic download pins in the download pin bed can be recovered by changing the phase change material in the download pin bed into a liquid state, and then used to make a download pin bed adapted to other PCBA products. Thus, it can be seen that the download pin bed provided by the present invention has a high recycling value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0023] Figure 1 is a schematic diagram of the working principle of the tooling for making a download pin bed provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of the structure of the positioning circuit board in the tooling for making a download pin bed provided by an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of the structure of the magnetic download pin in the tooling for making a download pin bed provided by an embodiment of the present invention;

[0026] Figure 4 is a schematic diagram of the structure of the bed mold in the tooling for making a download pin bed provided by an embodiment of the present invention.

[0027] The labels in the figure are:

[0028] 1, positioning circuit board; 11, coil; 12, terminal; 2, magnetic download pin; 21, needle tip; 22, connector; 3, working platform; 4, bed mold; 41, frame edge; 42, bottom plate; 43, temperature control module; 5, programming terminal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] For ease of understanding, the present invention will be further described below with reference to the accompanying drawings.

[0030] See Figure 1, the tooling for manufacturing a download pin bed provided by an embodiment of the present invention includes a positioning circuit board 1, a plurality of magnetic download pins 2, and a bed mold 4 filled with a phase change material. The working principle of the tooling for manufacturing a download pin bed provided by an embodiment of the present invention is as follows: First, the positioning circuit board 1 positions the magnetic download pins 2 placed on the working platform 3. The so-called "positioning" means that the magnetic download pins 2 are adsorbed to each preset point on the positioning circuit board 1 in an upright posture. Then, the positioning circuit board 1 transports the positioned magnetic download pins 2 into the bed mold 4. The bed mold 4 is provided with a phase change material. The magnetic download pins 2 are inserted into the phase change material when the phase change material is in a liquid state. Finally, the phase change material is changed from a liquid state to a solid state, so that the magnetic download pins 2 are fixed in the phase change material according to the preset points on the positioning circuit board 1. The solid phase change material and the magnetic download pins 2 together form a download pin bed. The magnetic download pins 2 are the probes of the download pin bed. When in use, the magnetic download pins 2 are connected to a programming terminal 5 through signal lines.

[0031] See Figures 2 to 4 , the positioning circuit board 1 is provided with a plurality of coils 11, and the center points of the coils 11 are arranged in the same layout as the download points of the PCBA to be programmed. Figure 2 Exemplarily shows the structure of the positioning circuit board 1 when the download points of the PCBA are three download points arranged in a row. The center points of the coils 11 are completely corresponding to the download points of the PCBA in terms of position layout. The center points of the coils 11 are the "preset points" mentioned above. One end of the magnetic download pin 2 is a magnetic needle tip 21, and the other end is a connector 22 for connecting a signal line. When the coils 11 are energized to generate a magnetic field, the needle tip 21 of the magnetic download pin 2 faces upward and is adsorbed to the preset points on the positioning circuit board 1. It should be noted that in order to ensure that the needle tip 21 of the magnetic download pin 2 faces upward and is adsorbed to the preset points on the positioning circuit board 1, the magnetic field generated by the energization of the coils 11 should correspond to the magnetic field of the magnetic needle tip 21. For example, when the upper end of the needle tip 21 is the S pole, the position of the magnetic field generated by the energization of the coils 11 corresponding to the upper end of the needle tip 21 should be the N pole; another example is that when the upper end of the needle tip 21 is the N pole, the position of the magnetic field generated by the energization of the coils 11 corresponding to the upper end of the needle tip 21 should be the S pole. In addition, the number of magnetic download pins 2 used is determined according to the number of coils 11 to ensure that there is a magnetic download pin 2 at each preset point. The bed mold 4 includes a frame edge 41 and a bottom plate 42. The phase change material is filled in the mold cavity surrounded by the bottom plate 42 and the frame edge 41. The connection between the bottom plate 42 and the frame edge 41 is detachable.

[0032] The following introduces the specific steps of manufacturing a download pin bed using the tooling provided by an embodiment of the present invention:

[0033] S1, take the magnetic download pins 2 and lay them on the working platform 3. Suspend the positioning circuit board 1 directly above the magnetic download pins 2. Energize the coils 11 to generate a magnetic field and let each coil 11 adsorb a magnetic download pin 2.

[0034] The number of the magnetic download pins 2 is not less than that of the coils 11 of the positioning circuit board 1. When laying the magnetic download pins 2, they can be placed neatly or scattered. Of course, since each coil 11 only needs to adsorb one magnetic download pin 2, it is necessary to avoid the magnetic download pins 2 from stacking locally as much as possible. In addition, if it is found that a certain coil 11 adsorbs more than one magnetic download pin 2, the redundant magnetic download pins 2 can be manually removed.

[0035] Since the position layout of the coils 11 is consistent with the download points of the PCBA to be programmed when manufacturing the positioning circuit board 1, the correspondence between the positions of the magnetic download pins 2 and the download points can be quickly completed through step S1. In specific practical applications, in order to ensure that the magnetic download pins 2 accurately locate at the center points of the coils 11, the diameter of the coils 11 should not be too large. This embodiment provides a preferred structure of the coils 11, as Figure 2 shown, the coil 11 is a planar spiral trace, and one end thereof is located at the center point of the coil 11. In other embodiments, the coil 11 can also be in other structural forms. For example, the coil 11 adopts a planar spiral trace with an end point not at the center point, that is, the coil 11 is integrally annular. Another example is that the coil 11 is separately manufactured in the structure of a helical spring and then installed on the positioning circuit board 1 to form a part of the positioning circuit board 1. In addition, when adsorbing the magnetic download pins 2 onto the positioning circuit board 1, the positioning circuit board 1 can be slightly shaken horizontally, similar to the action of shaking a sieve, which is beneficial to the accurate positioning of the magnetic download pins 2.

[0036] S2. Move the positioning circuit board 1 to the bed die 4 to immerse the connection heads 22 of the magnetic download pins 2 into the phase change material which is in a liquid state currently, and then change the phase change material from the liquid state to the solid state.

[0037] As Figure 3 shown, after the magnetic download pins 2 are adsorbed onto the positioning circuit board 1, the needle tips 21 face upward and remain upright. When immersing the connection heads 22 into the phase change material, the positioning circuit board 1 should be kept horizontal, so that the plane where the bottom ends of all the magnetic download pins 2 are located will be parallel to the bottom plate 42 of the bed die 4. It should be noted that keeping the positioning circuit board 1 stationary and moving the bed die 4 upward can also immerse the connection heads 22 into the phase change material.

[0038] Since the phase change material needs to be kept in a solid state when using the download needle bed, the phase change material that is solid at normal temperature can be used as a preferred material, such as paraffin wax, etc. It can be understood that the phase change material does not necessarily have to be a phase change material that is solid at normal temperature. For example, when programming the PCBA at low temperature, a phase change material that is liquid at normal temperature can also be used, as long as the phase change material is solid in the above-mentioned low-temperature environment.

[0039] AsFigure 4 As shown, in order to facilitate changing the temperature of the phase change material, the bed mold 4 of this embodiment is provided with a temperature regulation module 43. The temperature regulation module 43 is located inside the frame edge 41 and contacts the phase change material. Turning on the temperature regulation module 43 can heat the phase change material. Additionally, the temperature regulation module 43 can also be arranged outside the frame edge 41. The frame edge 41 and / or the bottom plate 42 are made of heat-conducting materials. After turning on the temperature regulation module 43, the heat is conducted to the phase change material through the frame edge 41 and / or the bottom plate 42 to achieve heating. Particularly, a dedicated temperature regulation module may not be provided for the tooling for manufacturing the download needle bed. When needed, the download needle bed can be directly placed in an environment that can cause the phase change material to complete the phase change.

[0040] S3. Cut off the power supply to the coil 11 or supply power in the reverse direction to separate the positioning circuit board 1 from the magnetic download needle 2, and remove the bottom plate 42 of the bed mold 4 to expose the connector 22 of the magnetic download needle 2.

[0041] After the phase change material becomes solid, it forms a download needle bed together with the magnetic download needle 2. By exposing both ends of the magnetic download needle 2, it can be put into use. Therefore, it is necessary to move the positioning circuit board 1 above the needle tip 21 and the bottom plate 42 below the connector 22. Cutting off the power supply to the coil 11 is to make the magnetic field disappear, and supplying power to the coil 11 in the reverse direction is to generate a repulsive magnetic force with the needle tip 21. Both methods can separate the positioning circuit board 1 from the magnetic download needle 2.

[0042] As can be seen from step S3, before the positioning circuit board 1 is separated from the magnetic download needle 2, the coil 11 has been kept powered on. To facilitate power supply to the coil 11, the tooling provided in this embodiment further includes a clamping device. The clamping device is integrated with terminals for supplying power to the coil 11. When the clamping device clamps the positioning circuit board 1, the terminals on the clamping device are electrically connected to the coil 11. Figure 1 An exemplary preferred solution of the positioning circuit board 1 that can cooperate with the clamping device is shown. In this solution, terminals 12 (i.e., the second terminals) electrically connected to the coil 11 are provided on the side of the positioning circuit board 1. The clamping device clamps through the side of the positioning circuit board 1. The terminals (i.e., the first terminals) on the clamping device correspond to the positions of the terminals 12 and form an electrical connection after clamping. It can be understood that in other embodiments, there may only be the terminals on the clamping device. In this case, when the clamping device clamps the positioning circuit board 1, the terminals are directly electrically connected to the coil 11 through wires. Of course, terminals electrically connected to the coil 11 may also be provided only on the positioning circuit board 1. When the clamping device clamps the positioning circuit board 1, it is directly connected through wires corresponding to the terminals on the positioning circuit board 1.

[0043] The present invention also provides a downloading pin bed prepared by the method of the present invention. The downloading pin bed includes a bed body made of a phase change material and magnetic downloading pins fixed to the bed body. After the program of a certain PCBA product is burned, the phase change material of the downloading pin bed corresponding to the PCBA product can be changed back to the liquid state, so as to recover the magnetic downloading pins in the downloading pin bed for making downloading pin beds adapted to other PCBA products. Thus, it can be seen that the downloading pin bed provided by the present invention has a high recycling value. In addition, although the positioning circuit board 1 needs to be separately made for different PCBA products, the cost is very low compared with the cost consumed in the traditional method of making the downloading pin bed, and its production cycle is shorter. Therefore, the tooling provided by the present invention can be used to make the downloading pin bed at low cost and in a short cycle.

[0044] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tooling for manufacturing a download bed of needles, characterized in that, Comprising: A positioning circuit board (1), the positioning circuit board (1) is provided with a plurality of coils (11), and the center points of the coils (11) are arranged in the same layout as the download points of the PCBA to be programmed; A plurality of magnetic download pins (2), the number of the magnetic download pins (2) is not less than the number of the coils (11), one end of the magnetic download pin (2) is a magnetic needle head (21), and the other end is a connector (22) for connecting a signal line; A bed mold (4), the bed mold (4) includes a frame edge (41) and a bottom plate (42), a phase change material is contained in the mold cavity surrounded by the bottom plate (42) and the frame edge (41), and the bottom plate (42) is detachably connected to the frame edge (41); It further includes a clamping device for clamping the positioning circuit board (1), and the clamping device is integrated with a first terminal for energizing the coils (11). When the clamping device clamps the positioning circuit board (1), the first terminal is electrically connected to the coils (11); A second terminal cooperating with the first terminal is arranged on the side of the positioning circuit board (1), and the second terminal is electrically connected to the coils (11); the coils (11) are used to generate a magnetic field when energized to adsorb the magnetic download pins (2) to be adsorbed to the preset positions on the positioning circuit board (1) in an upright posture to complete positioning; The bed mold (4) further includes a temperature control module (43) for changing the temperature of the phase change material; when the phase change material is in a liquid state, it can immerse the connector (22) of the positioned magnetic download pin (2), and then change to a solid state; the temperature control module (43) can heat the phase change material and make it change to a liquid state to recover the magnetic download pins (2).

2. The tooling according to claim 1, characterized in that, The phase change material is in a solid state at normal temperature.

3. The tooling according to any one of claims 1 to 2, characterized in that, The coil (11) is a planar spiral trace.

4. The tooling according to claim 3, characterized in that, One end point of the coil (11) is located at the center point of the coil (11).

5. A method for manufacturing a download pin bed, characterized in that, The method uses the tooling for manufacturing a download needle bed as described in any one of claims 1 to 4, and includes the following steps: Take the magnetic download pins (2) and place them on the working platform (3), suspend the positioning circuit board (1) directly above the magnetic download pins (2), energize the coils (11) to generate a magnetic field and let each coil (11) adsorb a magnetic download pin (2); Move the positioning circuit board (1) to the bed mold (4) to immerse the connector (22) of the magnetic download pin (2) in the currently liquid phase change material, and then change the phase change material from a liquid state to a solid state; Cut off the power supply of the coils (11) or energize them in the reverse direction to separate the positioning circuit board (1) from the magnetic download pins (2), and remove the bottom plate (42) of the bed mold (4) to expose the connector (22) of the magnetic download pins (2).

6. The method according to claim 5, wherein When adsorbing the magnetic download pins (2) to the positioning circuit board (1), gently shake the positioning circuit board (1) in the horizontal direction.

7. A download jig, characterized in that The download needle bed is obtained by the method for manufacturing a download needle bed as described in claim 5 or 6.

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