A network filter housing monomer structure and its production process

Abstract

The present invention discloses a network filter housing monomer structure and a production process thereof, and relates to the technical field of network filter housing production. Aiming at the problem that the quality of the soldering process of the existing network filter housing cannot be effectively controlled, resulting in unstable product quality and high rework rate, the following scheme is proposed, which includes a housing body, a pin terminal is arranged at the top of the housing body, an external PIN foot is installed at the bottom of the housing body, the pin terminal and the external PIN foot are evenly arranged along the length direction of the housing body, the pin terminal and the external PIN foot are symmetrically arranged with the central axis of the housing body, and the side wall of the pin terminal is provided with a wire hanging groove. The structure of the present invention is novel, and the device can effectively improve the product's solderability requirements and antioxidant capacity, and is conducive to tin climbing along the wedge-shaped tin slope to wrap the wedge-shaped slope of the external PIN foot, thereby improving the welding firmness, preventing the generation of cold solder joints, ensuring good conductivity, improving product safety performance, and facilitating use.

Description

Technical Field

[0001] The invention relates to the technical field of network filter housing production, and in particular to a network filter housing monomer structure and a production process thereof. Background Art

[0002] The function of the electronic network filter housing is to protect and contain the electronic and electrical components inside the inner cavity of the housing. The electrical components in the inner cavity are connected to the PCB board through the pin terminals on the outside of the housing. The existing network filter housing includes a shell and pin terminals symmetrically arranged on both sides.

[0003] During the production process of the shell, the pin terminals are first nickel-plated and tin-plated, and then the external connecting rods on the connecting pin terminals are cut off to form a single network filter shell. After cutting off the external connecting rod, the cross-section of the pin terminal will expose the original metal material, and there is no nickel-tin layer on the cross-section. The customer needs to perform a soldering process on the pin terminals of the network filter during subsequent use. The product is not put into the soldering process in time when it is transported to the client. The cross-section of the network filter pin terminal is very likely to produce an oxide layer, which makes it easy for the client to have a cold solder joint on the cross-section of the network filter pin terminal during the soldering process, and new tin cannot be soldered on. The soldering process quality of the network filter shell delivered to the client cannot be effectively controlled, resulting in unstable product quality and a high rework rate. Therefore, in order to solve such problems, we propose a single structure of a network filter shell and its production process. Summary of the invention

[0004] The invention provides a network filter housing monomer structure and a production process thereof, which solves the problem that the soldering process quality of the network filter housing cannot be effectively controlled, resulting in unstable product quality and a high repair rate.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A network filter housing monomer structure comprises a housing body, wherein a pin terminal is arranged at the top end of the housing body, an external PIN foot is installed at the bottom end of the housing body, the pin terminal and the external PIN foot are evenly arranged along the length direction of the housing body, the pin terminal and the external PIN foot are symmetrically arranged with respect to the central axis of the housing body, a wire hanging groove is arranged at the side wall of the pin terminal, a welding surface is arranged at the bottom end of the external PIN foot, a cross-section is arranged at one end of the external PIN foot, a wedge-shaped tin climbing slope is arranged on the outer wall of the external PIN foot, and an upper cover is arranged at the top end of the housing body.

[0007] Preferably, retaining walls are provided at both ends of the shell body, and grooves are provided at the top ends of the retaining walls.

[0008] Preferably, a core accommodating groove is provided at the top of the shell body, and the core accommodating groove is symmetrically arranged with respect to the central axis of the shell body, and the outer wall of the bottom end of the shell body and the inner cavity of the core accommodating groove are matte structures.

[0009] Preferably, a guide hole is provided at the top of the shell body, one end of the guide hole passes through the shell body and extends to the outside, and a first pin position identification mark is provided on the side wall of the shell body.

[0010] Preferably, the external PIN foot and the pin terminal are integrally formed by stamping a material plate, and the material plate is provided with an external connecting rod, an internal connecting rod, a pre-folding position, a trimming and a positioning hole, a limiting groove is provided between the pin terminal and the external PIN foot, a second cutting position is provided between the external connecting rod and the external PIN foot, and a first cutting position is provided between the internal connecting rod and the pin terminal.

[0011] Preferably, a cross-section and a wedge-shaped tin climbing slope are formed at one end of the outer PIN foot by punching the first cutting position and the second cutting position.

[0012] A production process of a network filter housing monomer structure comprises the following steps:

[0013] S1: Terminal pin stamping and bending: a process of placing the material plate into a stamping continuous die for stamping and bending. First, trim the two sides of the material plate to ensure that the material width dimensional accuracy meets the requirements;

[0014] Then, a positioning hole is punched out on one side of the material plate, and the material strip is accurately positioned by the positioning hole to achieve the punching size.

[0015] Afterwards, a pre-folding position is punched out on the other side close to the material plate;

[0016] Punching out pin terminals at corresponding positions on the material plate along the pre-folded positions;

[0017] After passing through an empty pressure position, an external PIN foot is punched out on the other side of the material plate connected to the pin terminal, and an external connecting rod and an internal connecting rod are formed at the outer ends of the pin terminal and the external PIN foot respectively;

[0018] The connection limit function of the inner connecting rod prevents the pin from being deformed during the bending, electroplating and injection molding process of the terminal pin;

[0019] After several consecutive empty pressure positions, cut off the inner connecting rod;

[0020] Then the next stamping station bends the outer PIN foot and the pin terminal 90° into shape, and the bending angle is controlled within the range of 90-95°;

[0021] Forming a terminal finished product;

[0022] S2: Injection molding: Take two groups of terminal products and place them flatly in the injection mold. Through injection molding, the bent parts of the terminal pins of the two groups of terminal products are injection-molded and wrapped together to form several shell bodies connected in the middle. The colloid is contained in the limiting groove. The limiting groove fixes the pin terminal and the outer PIN foot in the shell body to prevent the terminal pin from moving vertically up and down after injection molding;

[0023] An outer terminal pin group and an inner terminal pin group are formed on the plastic shell body, the outer terminal pin group is connected to the outer connecting rod, and the inner terminal pin group is connected to the inner connecting rod;

[0024] S3: Baking: Baking the injection molded product to release the internal stress of the product. The baking temperature is 135℃-145℃ for 2h-3h.

[0025] S4: Burr treatment: Then the finished product after baking is subjected to burr treatment. The steps of burr treatment are as follows: first, put the semi-finished product after baking into the track of the sandblasting machine, open the conveyor belt and adjust the sandblasting gun head to align it with the part of the semi-finished product where the burr needs to be treated; turn on the air pressure switch of the sandblasting gun head and adjust the air pressure to 35-50KG; turn on the sand suction machine, then turn on the conveyor belt and the sandblasting air pressure to perform sandblasting to remove the burrs;

[0026] S5: External rod cutting: the external connecting rod is cut off through the second cutting position;

[0027] S6: electroplating: then electroplating a metal protective layer on the surface of the formed pin terminal and the outer PIN pin, electroplating the surface of the outer terminal pin group and the inner terminal pin group, so that the outer surface of the outer terminal pin group and the inner terminal pin group are respectively formed with a metal protective layer, and the thickness of the plating layer is 0.5-1.5μm for the nickel layer and 4-12μm for the tin layer;

[0028] S7: removing the inner connecting rod: removing the inner connecting rod along the first cutting position, and separating the inner connecting rod from the inner terminal pin group on the plastic shell, so as to obtain a plurality of network filter shells with metal terminal pins;

[0029] S8: Obtain the finished product.

[0030] The beneficial effects of the present invention are:

[0031] 1. The pin terminals in the network filter housing are stamped and made by rolling sheet materials, so that there are outer connecting rods and inner connecting rods on both sides of the metal pins, and the inner pin terminals are provided with pre-folding positions. After the outer rods are cut off, the inner connecting rods are connected to the pin terminal groups on both sides of each housing for electroplating, so that the inner connecting rods conduct electricity and transfer current to each group of pin terminals, so that the pin terminals on both sides of the housing body and the cross-section surface of the outer PIN feet can be electroplated with a nickel-tin layer, thereby improving the product's solderability requirements and anti-oxidation ability.

[0032] 2. A wedge-shaped tin climbing slope is set at the front end of the outer PIN foot on the side wall of the network filter housing. This wedge-shaped tin climbing slope design is more effective in improving the client's welding of the PCB board, making the connection between the outer PIN foot and the PCB board more firmly, making it easier to solder the outer PIN foot and the PCB board, which is conducive to tin climbing along the wedge-shaped tin climbing slope to wrap the wedge-shaped slope of the outer PIN foot, thereby improving the welding firmness, preventing the occurrence of cold soldering, ensuring good conductivity, and improving product safety performance.

[0033] In summary, the device can effectively improve the product's solderability requirements and antioxidant capacity, and is conducive to tin climbing along the wedge-shaped tin slope to wrap the wedge-shaped slope of the outer PIN foot, thereby improving welding firmness, preventing the occurrence of cold solder joints, ensuring good conductivity, improving product safety performance, and facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the integrated stamping and bending forming structure of the terminal pins of the present invention.

[0035] Figure 2 It is a schematic diagram of the terminal pin bending structure of the present invention.

[0036] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0037] Figure 4 It is a schematic diagram of the injection molding structure of the present invention.

[0038] Figure 5 It is a front view of the shell injection molding structure of the present invention.

[0039] Figure 6 It is a side view of the shell injection molding structure of the present invention.

[0040] Figure 7 It is a structural schematic diagram of cutting the outer connecting rod of the present invention.

[0041] Figure 8 This is a front view of the structure of the outer connecting rod cut out of the present invention.

[0042] Fig. 9 The figure is a side view of the structure of the outer connecting rod cut out of the present invention.

[0043] Fig.10 The figure is a side view of the inner and outer connecting rods cut out of the present invention.

[0044] Fig.11 It is a schematic diagram of the finished structure of the housing monomer of the present invention.

[0045] Fig.12 It is a schematic diagram of the bottom structure of the finished shell monomer of the present invention.

[0046] Fig.13 It is a side view of the finished structure of the housing monomer of the present invention.

[0047] Fig.14 For the present invention Fig.11 Enlarged view of point B in the middle.

[0048] Numbers in the figure: 1. Shell body; 2. Retaining wall; 3. Magnetic core receiving slot; 4. First pin position identification mark; 5. External PIN pin; 6. Pin terminal; 7. Wire hanging slot; 8. Guide hole; 9. Groove; 10. Welding surface; 11. Cross section; 12. Wedge-shaped tin climbing slope; 13. Material plate; 14. External connecting rod; 15. Internal connecting rod; 16. First cutting position; 17. Pre-folding position; 18. Trimming; 19. Positioning hole; 20. Limiting slot; 21. Second cutting position; 22. Upper cover. DETAILED DESCRIPTION

[0049] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0050] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or connected or set in one piece; the models of electrical appliances provided in the present invention are for reference only. For ordinary technicians in this field, different models of electrical appliances with the same functions can be replaced according to actual usage conditions. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Reference Figure 1-11A network filter housing monomer structure, comprising a housing body 1, a pin terminal 6 is provided at the top of the housing body 1, an external PIN foot 5 is installed at the bottom of the housing body 1, the pin terminal 6 and the external PIN foot 5 are evenly arranged along the length direction of the housing body 1, the pin terminal 6 and the external PIN foot 5 are symmetrically arranged with the central axis of the housing body 1, the side wall of the pin terminal 6 is provided with a wire hanging groove 7, the bottom end of the external PIN foot 5 is provided with a welding surface 10, one end of the external PIN foot 5 is provided with a cross-section 11, the outer wall of the external PIN foot 5 is provided with a wedge-shaped tin climbing slope 12, the two sides increase the tin climbing slope, and the copper exposed area of ​​the cut surface is reduced, the top of the housing body 1 is provided with an upper cover 22, the two ends of the housing body 1 are provided with retaining walls 2, the top of the retaining wall 2 is provided with a groove 9, the top of the housing body 1 is provided with a magnetic core accommodating groove 3, the magnetic core accommodating The groove 3 is symmetrically arranged with respect to the central axis of the shell body 1. The outer wall of the bottom end of the shell body 1 and the inner cavity of the magnetic core accommodating groove 3 are of matte structure. A guide hole 8 is arranged at the top of the shell body 1. One end of the guide hole 8 passes through the shell body 1 and extends to the outside. A first pin position identification mark 4 is arranged on the side wall of the shell body 1. The outer PIN foot 5 and the pin terminal 6 are integrally formed by stamping a material plate 13. An outer connecting rod 14, an inner connecting rod 15, a pre-folding position 17, a trimming 18 and a positioning hole 19 are arranged on the material plate 13. A limiting groove 20 is arranged between the pin terminal 6 and the outer PIN foot 5. A second cutting position 21 is arranged between the outer connecting rod 14 and the outer PIN foot 5. A first cutting position 16 is arranged between the inner connecting rod 15 and the pin terminal 6. By stamping the first cutting position 16 and the second cutting position 21, a cross-section 11 and a wedge-shaped tin climbing slope 12 are formed at one end of the outer PIN foot 5.

[0053] A production process of a network filter housing monomer structure comprises the following steps:

[0054] S1: Terminal pin stamping and bending: a process of placing the material plate 13 into a stamping continuous die for stamping and bending, firstly trimming 18 the two sides of the material plate 13 to ensure that the material width dimensional accuracy meets the requirements;

[0055] Then, a positioning hole 19 is punched out on one side of the material plate 13, and the material strip is accurately positioned by the positioning hole 19 for punching and blanking.

[0056] Afterwards, a pre-folding position 17 is punched out on the other side close to the material plate 13;

[0057] Punching out the pin terminal 6 at the corresponding position on the material plate 13 along the pre-folding position 17;

[0058] After a vacuum position, an external PIN foot 5 is punched out on the other side of the material plate 13 connected to the pin terminal 6, and an external connecting rod 14 and an internal connecting rod 15 are formed at the outer ends of the pin terminal 6 and the external PIN foot 5 respectively;

[0059] The connection and limiting function of the inner connecting rod 15 prevents the pin from being deformed during the bending, electroplating and injection molding processes of the terminal pins;

[0060] After several consecutive empty pressure positions, the inner connecting rod 15 is cut off;

[0061] Then the next stamping station bends the outer PIN foot 5 and the pin terminal 6 by 90°, and the bending angle is controlled within the range of 90-95°;

[0062] Forming a terminal finished product;

[0063] S2: Injection molding: Take two groups of terminal products and place them flatly in the injection mold. Through injection molding, the bent parts of the terminal pins of the two groups of terminal products are injection-molded and wrapped together to form several shell bodies 1 connected in the middle. The colloid is contained in the limiting groove 20. The limiting groove 20 fixes the pin terminal 6 and the outer PIN foot 5 in the shell body 1 to prevent the terminal pins from moving vertically up and down after injection molding;

[0064] An outer terminal pin group and an inner terminal pin group are formed on the plastic housing body 1. The outer terminal pin group is connected to the outer connecting rod 14, and the inner terminal pin group is connected to the inner connecting rod 15.

[0065] S3: Baking: Baking the injection molded product to release the internal stress of the product. The baking temperature is 135℃-145℃ for 2h-3h.

[0066] S4: Burr treatment: Then the finished product after baking is subjected to burr treatment. The steps of burr treatment are as follows: first, put the semi-finished product after baking into the track of the sandblasting machine, open the conveyor belt and adjust the sandblasting gun head to align it with the part of the semi-finished product where the burr needs to be treated; turn on the air pressure switch of the sandblasting gun head and adjust the air pressure to 35-50KG; turn on the sand suction machine, then turn on the conveyor belt and the sandblasting air pressure to perform sandblasting to remove the burrs;

[0067] S5: Cutting of outer rods: cutting off the outer connecting rod 14 through the second cutting position 21;

[0068] S6: electroplating: then electroplating a metal protective layer on the surface of the formed pin terminal 6 and the outer PIN pin 5, electroplating the surface of the outer terminal pin group and the inner terminal pin group, so that the outer surface of the outer terminal pin group and the inner terminal pin group are respectively formed with a metal protective layer, and the thickness of the plating layer is 0.5-1.5μm for the nickel layer and 4-12μm for the tin layer;

[0069] S7: removing the inner connecting rod 15: removing the inner connecting rod 15 along the first cutting position 16, the inner connecting rod 15 is separated from the inner terminal pin group on the plastic shell, and a plurality of network filter shells with metal terminal pins are obtained;

[0070] S8: Obtain the finished product.

[0071] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0072] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for producing a single structure of a network filter housing, characterized in that: The steps include: S1: stamping and bending of terminal pins: a process of placing a material plate (13) into a stamping continuous die for stamping and bending, firstly trimming (18) both sides of the material plate (13) to ensure that the material width dimensional accuracy meets the requirements; Then, a positioning hole (19) is punched out on one side of the material plate (13), and the punching blanking size of the material strip is accurately positioned through the positioning hole (19); Afterwards, a pre-folding position (17) is punched out on the other side close to the material plate (13); Punching out pin terminals (6) at corresponding positions on the material plate (13) along the pre-folded positions (17); After passing through an empty pressure position, an external PIN foot (5) is punched out on the other side of the material plate (13) connected to the pin terminal (6), and an external connecting rod (14) and an internal connecting rod (15) are formed at the outer ends of the pin terminal (6) and the external PIN foot (5), respectively; The connection limiting function of the inner connecting rod (15) prevents the pin from being deformed during the bending, electroplating and injection molding processes of the terminal pin; After several consecutive empty pressure positions, the inner connecting rod (15) is cut off; Then, the next stamping station bends the outer PIN foot (5) and the pin terminal (6) by 90°, and the bending angle is controlled within the range of 90-95°; Forming a terminal finished product; S2: Injection molding: Take two groups of terminal products and place them flat against each other in an injection mold. Through injection molding, the bent parts of the terminal pins of the two groups of terminal products are injection molded and wrapped together to form a plurality of shell bodies (1) connected in the middle. The colloid is contained in the limiting groove (20). The limiting groove (20) fixes the pin terminal (6) and the outer PIN foot (5) in the shell body (1) to prevent the terminal pin from moving vertically up and down after injection molding. An external terminal pin group and an internal terminal pin group are formed on the plastic housing body (1), the external terminal pin group is connected to the external connecting rod (14), and the internal terminal pin group is connected to the internal connecting rod (15); S3: Baking: Baking the injection molded product to release the internal stress of the product. The baking temperature is 135℃-145℃ for 2h-3h. S4: Burr treatment: Then the finished product after baking is subjected to burr treatment. The steps of burr treatment are as follows: first, put the semi-finished product after baking into the track of the sandblasting machine, open the conveyor belt and adjust the sandblasting gun head to align it with the part of the semi-finished product where the burr needs to be treated; turn on the air pressure switch of the sandblasting gun head and adjust the air pressure to 35-50KG; turn on the sand suction machine, then turn on the conveyor belt and the sandblasting air pressure to perform sandblasting to remove the burrs; S5: cutting of outer rod: cutting off the outer connecting rod (14) through the second cutting position (21); S6: electroplating: then electroplating the formed pin terminal (6) and the outer PIN pin (5) with a metal protective layer, electroplating the outer terminal pin group and the inner terminal pin group so that the outer surfaces of the outer terminal pin group and the inner terminal pin group are respectively formed with a metal protective layer, the thickness of the plating layer is 0.5-1.5 μm for the nickel layer, and the thickness of the tin layer is 4-12 μm; S7: removing the inner connecting rod: removing the inner connecting rod (15) along the first cutting position (16), the inner connecting rod (15) is separated from the inner terminal pin group on the plastic shell, and a plurality of network filter housings with metal terminal pins are obtained; S8: Obtain the finished product.

2. A network filter housing monomer structure obtained by the production method according to claim 1, characterized in that: The invention comprises a shell body (1), the top of the shell body (1) is provided with a pin terminal (6), the bottom of the shell body (1) is provided with an external PIN foot (5), the pin terminal (6) and the external PIN foot (5) are evenly arranged along the length direction of the shell body (1), the pin terminal (6) and the external PIN foot (5) are symmetrically arranged with respect to the central axis of the shell body (1), the side wall of the pin terminal (6) is provided with a wire hanging groove (7), the bottom end of the external PIN foot (5) is provided with a welding surface (10), one end of the external PIN foot (5) is provided with a cross-section (11), the outer wall of the external PIN foot (5) is provided with a wedge-shaped tin climbing slope (12), and the top of the shell body (1) is provided with an upper cover (22).

3. A network filter housing monomer structure according to claim 2, characterized in that: Both ends of the outer shell body (1) are provided with retaining walls (2), and the top of the retaining wall (2) is provided with a groove (9).

4. A network filter housing monomer structure according to claim 2, characterized in that: A magnetic core accommodating groove (3) is provided at the top of the shell body (1), and the magnetic core accommodating groove (3) is symmetrically arranged with respect to the central axis of the shell body (1); the outer wall at the bottom end of the shell body (1) and the inner cavity of the magnetic core accommodating groove (3) are matte structures.

5. A network filter housing monomer structure according to claim 2, characterized in that: A guide hole (8) is provided at the top end of the shell body (1), one end of the guide hole (8) passes through the shell body (1) and extends to the outside, and a first pin position identification mark (4) is provided on the side wall of the shell body (1).

6. A network filter housing monomer structure according to claim 2, characterized in that: The outer PIN foot (5) and the pin terminal (6) are integrally formed by stamping a material plate (13); the material plate (13) is provided with an outer connecting rod (14), an inner connecting rod (15), a pre-folding position (17), a trimming (18) and a positioning hole (19); a limiting groove (20) is provided between the pin terminal (6) and the outer PIN foot (5); a second cutting position (21) is provided between the outer connecting rod (14) and the outer PIN foot (5); a first cutting position (16) is provided between the inner connecting rod (15) and the pin terminal (6); and a cross-section (11) and a wedge-shaped tin climbing slope (12) are formed at one end of the outer PIN foot (5) by stamping the first cutting position (16) and the second cutting position (21).

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