Method for removing PCB riveting static electricity

Abstract

The invention discloses a method for removing riveting static electricity of a PCB (Printed Circuit Board), which is characterized in that a riveting machine is adopted to perform riveting operation when the PCB is riveted, a rivet bowl for accommodating a rivet is rotationally arranged on the riveting machine, a static electricity eliminator for generating positive and negative charges is also arranged on the riveting machine, and the static electricity eliminator is communicated with the rivet bowl through an air pipe; and the generated positive and negative charges are conveyed into the rivet wrist. According to the method, the positive and negative charges generated by the static electricity eliminator are used for neutralizing static electricity on the rivets in the rivet bowl, the purpose of eliminating the static electricity on the rivets is achieved, and therefore the phenomena that the rivets are clamped and cannot be discharged due to electrostatic adsorption can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of printed circuit board manufacturing, and in particular to a method for removing static electricity during PCB riveting. Background Art

[0002] For the production of multi-layer circuit boards, it is necessary to use the rivet reinforcement method to rivet the stacked inner core board, prepreg and outer copper foil into a whole before pressing; the existing riveting operation of circuit boards is basically carried out by a riveting machine that can automatically load the rivets, that is, the riveting machine can realize the automatic loading of rivets, thereby achieving the purpose of automated production.

[0003] The rivet conveying mechanism used in the existing automatic riveting machine is shown in the previously disclosed patent CN219581592U. During the riveting production process of the riveting machine, rivets are automatically output from the rotating rivet bowl. During this process, the rivets will generate static electricity due to the rotational friction. Due to the electrostatic adsorption, a large number of rivets will be adsorbed on the inner wall of the rivet bowl, resulting in frequent rivet jams and failure to put in rivets during the rivet output process, which seriously affects the production efficiency and quality risks. This is a difficult problem in the industry; and when there is static electricity in the rivets, the rivet chips generated during the riveting process will be adsorbed on the upper and lower die head punches (the vacuum tube cannot absorb the rivet chips), resulting in the rivet chips easily splashing into the board during the next riveting process, causing the inner layer circuit to short-circuit, affecting the production quality of the circuit board. Summary of the invention

[0004] In view of the above-mentioned technical defects of the prior art, the present invention provides a method for removing static electricity during PCB riveting, which utilizes the positive and negative charges generated by an electrostatic eliminator to neutralize the static electricity on the rivets in the rivet bowl, thereby achieving the purpose of eliminating the static electricity on the rivets, thereby avoiding the phenomenon of rivet jamming and rivet failure caused by static adsorption.

[0005] In order to solve the above technical problems, the present invention provides a method for removing static electricity during PCB riveting. When the PCB is riveted, a riveting machine is used to perform the riveting operation. A rivet bowl for accommodating rivets is rotated on the riveting machine. The riveting machine is also provided with an electrostatic eliminator for generating positive and negative charges, and the electrostatic eliminator is connected to the rivet bowl through an air duct to transport the generated positive and negative charges to the rivet arm.

[0006] Furthermore, the static eliminator is fixed to the riveting machine via a bracket and is located above the rivet bowl.

[0007] Furthermore, a fixing seat is provided on the riveting machine, the rivet bowl is rotatably arranged on one side of the fixing seat, and a cavity for accommodating rivets is formed between the fixing seat and the rivet bowl.

[0008] Furthermore, an air inlet groove for inserting the air duct is provided at the upper end of the fixing seat, and an air inlet channel connecting the air inlet groove and the cavity is formed in the fixing seat.

[0009] Furthermore, the air intake channel includes a vertically arranged first air intake channel and a horizontally arranged second air intake channel, the lower end of the first air intake channel is connected to the inner end of the second air intake channel so that the air intake channel forms a right-angle structure, the upper end of the first air intake channel is connected to the air intake groove, and the outer end of the second air intake channel is connected to the cavity.

[0010] Furthermore, a motor is provided on the side of the fixing seat away from the rivet bowl, a through hole is provided in the middle of the fixing seat for the rotating shaft of the motor to pass through, and the rivet bowl is fixed to the rotating shaft of the motor by a fixing member; the static eliminator is fixed to the motor by a bracket and is located above the rivet bowl.

[0011] Furthermore, the lower end of the static eliminator is provided with an air outlet connected to the air duct.

[0012] Furthermore, an air inlet for connecting to an external air supply device or an air pump is provided at the upper end of the static eliminator.

[0013] Furthermore, the rivet bowl is provided with an inlet for inserting rivets, and a detachable outer cover for sealing is provided at the inlet.

[0014] Furthermore, the outer cover is sleeved on the rivet bowl through an elastic rope and covers the outside of the loading port.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention adds an electrostatic eliminator for generating positive and negative charges to the riveting machine, and transmits the generated positive and negative charges to the rivet bowl through the air duct, and then utilizes the positive and negative charges to neutralize the static electricity on the rivets in the rivet bowl, thereby achieving the purpose of eliminating the static electricity on the rivets. Therefore, the method of the present invention can avoid the phenomenon of rivet jamming and rivet failure caused by static electricity adsorption, and after the static electricity is removed, the rivet chips generated in the riveting process will be sucked away with the dust suction pipe, thereby avoiding the problem of rivet chips splashing into the board and causing a short circuit in the inner layer circuit.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure for removing static electricity from PCB riveting in an embodiment;

[0019] Figure 2A cross-sectional view of a structure for removing static electricity from PCB riveting in an embodiment;

[0020] Figure 3 A schematic diagram of another embodiment of a rivet bowl having a loading port;

[0021] Figure 4 It is a schematic diagram of another embodiment after an outer cover is mounted on the rivet bowl. DETAILED DESCRIPTION

[0022] In order to more fully understand the technical content of the present invention, the present invention will be further introduced and explained in conjunction with the accompanying drawings and specific embodiments below; it should be noted that if there are descriptions such as "first", "second", etc. in the text, they are used to distinguish different components, etc., and do not represent the order of precedence, nor do they limit the "first" and "second" to be different types.

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0024] Example

[0025] like Figure 1 to Figure 2 As shown, a method for removing static electricity from PCB riveting is shown in this embodiment. When the PCB is riveted, a riveting machine is used to perform the riveting operation. A rivet bowl 1 provided with accommodating rivets is rotated on the riveting machine. During the rotation of the rivet bowl, the rivets inside it will generate static electricity during the rotational friction. The riveting machine is also provided with an electrostatic eliminator 2 for generating positive and negative charges, and the electrostatic eliminator 2 is connected with the rivet bowl 1 through an air duct 3 to transport the generated positive and negative charges to the rivet arm 1; by adding an electrostatic eliminator for generating positive and negative charges to the riveting machine, and transporting the generated positive and negative charges to the rivet bowl through the air duct, and then using the transported positive and negative charges to neutralize the static electricity on the rivets in the rivet bowl, the purpose of eliminating the static electricity on the rivets is achieved. Therefore, the method of the present invention can avoid the phenomenon of rivet jamming and failure to be driven in caused by electrostatic adsorption, and after the static electricity is removed, the rivet chips generated in the riveting process will be sucked away with the vacuum tube, avoiding the problem of rivet chips splashing into the board and causing short circuit of the inner layer circuit.

[0026] The static eliminator mentioned above is an existing conventional product, which is a static eliminator that transports ionized air to a distant place to eliminate static electricity. It is mainly composed of a corona discharger, a high-voltage power supply and an air supply system.

[0027] Of course, in different application cases, in addition to using a static eliminator to achieve the purpose of eliminating static electricity, a static eliminator bar or ion blower with similar static eliminator function can also be used.

[0028] In one embodiment, in order to fix the rivet bowl 1, a fixing seat 4 is provided on the riveting machine, the rivet bowl 1 is rotatably arranged on one side of the fixing seat 4, and a cavity 10 for accommodating rivets is formed between the fixing seat 4 and the rivet bowl 1.

[0029] Preferably, in order to realize the rotation of the rivet bowl, a motor 5 is provided on the side of the fixed seat 4 away from the rivet bowl 1, and a through hole is provided in the middle of the fixed seat 4 for the rotating shaft 51 of the power supply motor 5 to pass through, and a bearing 52 is provided at the through hole, so that the rotation connection between the rotating shaft 51 and the fixed seat 4 is realized through the bearing, ensuring smooth rotation of the rotating shaft, and the rivet bowl 1 is fixed to the rotating shaft 51 of the motor 5 by the fixing part 6, so that the rivet bowl 1 can rotate with the rotation of the rotating shaft 51; the static eliminator 2 is fixed to the motor 5 by the bracket 53 and is located above the rivet bowl 1.

[0030] In one embodiment, an air inlet groove 41 for inserting the air supply pipe 3 is provided at the upper end of the fixing seat 4, and an air inlet channel 42 connecting the air inlet groove 41 and the cavity 10 is formed in the fixing seat 4, so that the positive and negative charges generated by the static eliminator 1 can flow into the cavity 10 inside the rivet bowl 1 by utilizing the air inlet channel 42 opened in the fixing seat 4, and the rivet bowl is not directly connected to the air duct, so as not to affect the rotation of the rivet bowl.

[0031] Preferably, the air inlet channel 42 includes a vertically arranged first air inlet channel 421 and a horizontally arranged second air inlet channel 422, the lower end of the first air inlet channel 421 is connected to the inner end of the second air inlet channel 422, so that the air inlet channel 42 forms a right-angle structure, the upper end of the first air inlet channel 421 is connected to the air inlet groove 41, and the outer end of the second air inlet channel 422 is connected to the containing cavity 10; that is, the first air inlet channel 420 is drilled vertically downward from the top of the fixed seat, the outer orifice of the first air inlet channel 421 is located in the air inlet groove 41, and the second air inlet channel 422 is drilled horizontally on one side of the fixed seat close to the rivet bowl, the inner orifice of the second air inlet channel 422 is connected to the inner orifice of the first air inlet channel 421, and the outer orifice of the second air inlet channel 422 is located in the containing cavity 40. The air inlet channel formed in this way is convenient for production and processing.

[0032] In one embodiment, the lower end of the static eliminator 2 is provided with an air outlet 20 connected to the air duct 3, and the upper end of the static eliminator 2 is provided with an air inlet 21 for connecting to an external air supply device or an air pump. The air inlet 21 is connected to the external air supply device or air pump through the air pipe, and is used to provide high-pressure air to the static eliminator 2 and blow the positive and negative charges generated by the static eliminator 2 out from the air outlet.

[0033] In another specific embodiment, Figure 3-Figure 4 As shown, the rivet bowl 1 is provided with a loading port 11 for loading rivets, and a detachable outer cover 12 for sealing is provided at the loading port 11. The outer cover 12 is mounted on the rivet bowl 1 through an elastic rope 13 and covers the outside of the loading port 11. This method can facilitate the assembly and disassembly of the outer cover.

[0034] In another specific implementation case, the structure in which the rivets in the rivet bowl are automatically output outward is an existing conventional technical means, and a detailed description and specific structure are not given in the embodiment of the present invention. For details, please refer to the contents of paragraphs 30 to 35 in the specification of the prior published patent CN219581592U and the drawings shown therein.

[0035] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for removing static electricity during PCB riveting, wherein a riveting machine is used for riveting operation, and a rivet bowl for accommodating rivets is rotated on the riveting machine, characterized in that: The riveting machine is also provided with an electrostatic eliminator for generating positive and negative charges, and the electrostatic eliminator is connected to the rivet bowl through an air duct to transport the generated positive and negative charges into the rivet arm.

2. The method for removing static electricity during PCB riveting according to claim 1, characterized in that: The static eliminator is fixed on the riveting machine through a bracket and is located above the rivet bowl.

3. The method for removing static electricity during PCB riveting according to claim 2, characterized in that: The riveting machine is provided with a fixing seat, the rivet bowl is rotatably arranged on one side of the fixing seat, and a cavity for accommodating rivets is formed between the fixing seat and the rivet bowl.

4. The method for removing static electricity during PCB riveting according to claim 3, characterized in that: An air inlet groove for inserting the air duct is provided at the upper end of the fixing seat, and an air inlet passage connecting the air inlet groove and the containing cavity is formed in the fixing seat.

5. The method for removing static electricity during PCB riveting according to claim 4, characterized in that: The air intake passage includes a vertically arranged first air intake passage and a horizontally arranged second air intake passage. The lower end of the first air intake passage is connected to the inner end of the second air intake passage so that the air intake passage forms a right-angle structure. The upper end of the first air intake passage is connected to the air intake groove, and the outer end of the second air intake passage is connected to the cavity.

6. The method for removing static electricity during PCB riveting according to claim 5, characterized in that: A motor is provided on the side of the fixing seat away from the rivet bowl, a through hole is provided in the middle of the fixing seat for the rotation shaft of the motor to pass through, and the rivet bowl is fixed to the rotation shaft of the motor through a fixing piece; the static eliminator is fixed to the motor through a bracket and is located above the rivet bowl.

7. The method for removing static electricity during PCB riveting according to any one of claims 1 to 6, characterized in that: The lower end of the static eliminator is provided with an air outlet communicated with the air duct.

8. The method for removing static electricity during PCB riveting according to claim 7, characterized in that: An air inlet is arranged at the upper end of the static eliminator.

9. The method for removing static electricity during PCB riveting according to claim 1, characterized in that: The rivet bowl is provided with an inlet for inserting rivets, and a detachable outer cover for sealing is provided at the inlet.

10. The method for removing static electricity during PCB riveting according to claim 9, characterized in that: The outer cover is sleeved on the rivet bowl through an elastic rope and covers the outside of the loading port.

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