Abrasive wheels and abrasive brush rolls for printed circuit board surface treatment

Abstract

This utility model discloses a grinding wheel and grinding brush roller for surface treatment of printed circuit boards, which have the advantages of good grinding ability and resistance to breakage. The grinding wheel for surface treatment of printed circuit boards of this utility model includes an annular and elastic base part and multiple grinding parts connected to the base part and surrounding the base part. The grinding parts are arranged in a solid block structure, and the content of abrasive in the grinding parts exceeds 40%.

Description

Technical Field

[0001] This utility model relates to the field of printed circuit board processing equipment, and in particular to a grinding wheel and grinding brush roller for surface treatment of printed circuit boards. Background Technology

[0002] In the electronics industry, printed circuit boards (PCBs) are key components for the operation of electronic devices. PCBs often have various impurities, uneven areas, and burrs on their surface. These defects not only affect the performance of electronic devices but can also cause problems such as short circuits and open circuits. Therefore, grinding PCBs is an important step to ensure their quality and reliability.

[0003] Existing technology uses nylon brushes to grind printed circuit boards. Due to its design, it has weak elasticity. To solve the elasticity problem, the grinding wheel is designed as a flat and thin sheet structure, and the part that performs the grinding action is designed as a needle to increase the elasticity of the grinding wheel. However, the needle-shaped grinding body is limited by diameter, and the abrasive ratio is generally 40% of the total substrate weight. If the abrasive content is increased, the needle-shaped grinding body is very easy to break.

[0004] Therefore, there is an urgent need for a grinding wheel and grinding brush roller with good grinding ability and not easy to break for the surface treatment of printed circuit boards to overcome the above defects. Utility Model Content

[0005] The purpose of this invention is to provide a grinding wheel for surface treatment of printed circuit boards that has good grinding ability and is not easily broken.

[0006] Another objective of this invention is to provide a grinding brush roller for surface treatment of printed circuit boards that has good grinding ability and is not easily broken.

[0007] To achieve the above objectives, the present invention provides a grinding wheel for surface treatment of printed circuit boards, comprising an annular and elastic base portion and a plurality of grinding portions connected to and surrounding the base portion. The grinding portions are arranged in a solid block structure, and the content of abrasive in the grinding portions exceeds 40%.

[0008] Preferably, the grinding section has a square, trapezoidal, or columnar structure.

[0009] Preferably, the base portion has multiple structural through holes, and the base portion is elastically positioned by relying on the structural through holes thereon.

[0010] Preferably, the structural through-holes are arranged in an arc shape.

[0011] Preferably, all structural through holes are bent in the same direction, and all structural through holes are arranged in a circle on the base with the axis of the base as the center.

[0012] Preferably, the base portion has two rings of grinding portions arranged side by side along the axial direction, and the two rings of grinding portions are staggered.

[0013] Preferably, the base portion surrounds a circular through hole, and the sidewall of the base portion protrudes near the circular through hole to form a ring-shaped structural protrusion.

[0014] Preferably, the base portion has multiple strip-shaped positioning protrusions extending from the sidewall of the circular through hole. The positioning protrusions are parallel to the central axis of the base portion, and the multiple positioning protrusions are arranged at equal angles on the sidewall of the circular through hole.

[0015] To achieve another objective mentioned above, this utility model also provides a grinding brush roller for surface treatment of printed circuit boards, including a bearing shaft and a plurality of grinding wheels, wherein the grinding wheels are mounted on the bearing shaft and the plurality of grinding wheels are stacked on the bearing shaft along the axial direction of the bearing shaft.

[0016] Preferably, adjacent grinding wheels are spaced apart.

[0017] Compared with existing technologies, this invention employs an elastic base portion. The elasticity of the grinding section is supported by the base portion, eliminating the need for the grinding section to bear the elasticity itself. This significantly increases the volume of the grinding section, allowing for greater pressure to be applied, thereby increasing friction and the grinding force of the grinding wheel. This results in more thorough grinding of the printed circuit board and reduces the risk of breakage. Furthermore, the abrasive content in the grinding section can be increased to over 40%. This higher abrasive content contributes to increased grinding force, which in turn enhances the grinding force of the grinding section and, consequently, the grinding force of the grinding wheel. Attached Figure Description

[0018] Figure 1 This is a perspective view of the grinding brush roller of this utility model.

[0019] Figure 2 This is a perspective view of the grinding brush roller of this utility model when it is at another angle.

[0020] Figure 3 This is a perspective view of the grinding wheel of this utility model.

[0021] Figure 4 This is a perspective view of the grinding wheel of this utility model when it is at another angle. Detailed Implementation

[0022] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0023] like Figure 1 and Figure 2As shown, this utility model provides a grinding wheel 10 for surface treatment of printed circuit boards. Multiple grinding wheels 10 and a support shaft 20 constitute a grinding brush roller 100 for surface treatment of printed circuit boards. This grinding brush roller 100 is used to grind the surface of the printed circuit board. The grinding wheels 10 are mounted on the support shaft 20, and multiple grinding wheels 10 are stacked on the support shaft 20 along its axial direction. When the support shaft 20 rotates, it synchronously drives the grinding wheels 10 to rotate, grinding the surface of the printed circuit board. Preferably, the support shaft 20 is a phenolic paper tube, but it is not limited to this; it can also be a metal tube or other materials depending on actual needs.

[0024] The structure of the grinding wheel 10 of this utility model is described in detail below.

[0025] like Figures 1 to 4 As shown, the grinding wheel 10 of this invention includes an annular and elastic base portion 11 and a plurality of grinding portions 12 connected to and surrounding the base portion 11. The grinding portions 12 are arranged in a solid block structure, and the content of abrasive in the grinding portions 12 exceeds 40%.

[0026] This invention employs an elastic base portion 11, whose elastic properties are supported by the grinding portion 12. The grinding portion 12 no longer needs to bear the elasticity, thus significantly increasing its volume and allowing for greater pressure to be applied, thereby increasing friction and the grinding force of the grinding wheel 10. This results in more thorough grinding of the printed circuit board and reduces the risk of breakage. Furthermore, the abrasive content in the grinding portion 12 can be increased to over 40%, which enhances the grinding force and consequently, the grinding force of the grinding wheel 10.

[0027] Preferably, the grinding wheel 10 is made of nylon material and contains mineral sand, which gives the grinding wheel 10 considerable grinding ability.

[0028] like Figures 1 to 4 As shown, the grinding section 12 has a square structure to enhance its grinding capability, but the grinding section 12 can also be configured as a trapezoidal or columnar structure as needed.

[0029] like Figures 1 to 4As shown, the base portion 11 has multiple structural through holes 13, which allow it to be elastically positioned. Preferably, the structural through holes 13 are arranged in a strip-like bend, and more preferably, they are arranged in an arc shape. All structural through holes 13 bend in the same direction. Preferably, in the embodiment provided by this invention, all structural through holes 13 bend clockwise to better utilize the elastic properties of the base portion 11. All structural through holes 13 are arranged in a circle around the axis of the base portion 11. To enhance the grinding effect, the base portion 11 has two rings of grinding portions 12 arranged side by side along the axial direction, with the two rings of grinding portions 12 staggered.

[0030] like Figures 1 to 4 As shown, the base portion 11 surrounds a circular through hole 14, and the side wall of the base portion 11 protrudes near the circular through hole 14 to form a ring-shaped structural protrusion 15. The grinding wheels 10 mounted on the bearing shaft 20 are stacked. The arrangement of the structural protrusion 15 ensures that there is a certain gap between two adjacent grinding wheels 10, so that powder and grinding fluid do not accumulate in the gap, facilitating chip removal and grinding fluid discharge.

[0031] like Figures 1 to 4 As shown, to enhance the positioning of the grinding wheel 10, the base portion 11 has multiple strip-shaped positioning protrusions 16 extending from the sidewall of the circular through hole 14. The positioning protrusions 16 are parallel to the central axis of the base portion 11, and are arranged at equal angles on the sidewall of the circular through hole 14. Preferably, a total of four positioning protrusions 16 are provided, but this number is not limited and other numbers can be provided as needed. Multiple mounting grooves 21 are formed on the support shaft 20, and the extending direction of the mounting grooves 21 is parallel to the axis of the support shaft 20. When the grinding wheel 10 is mounted on the support shaft 20, the positioning protrusions 16 engage with the mounting grooves 21, enhancing the installation stability of the grinding wheel 10.

[0032] like Figures 1 to 4 As shown, multiple grinding wheels 10 are stacked on the support shaft 20 along the axial direction of the support shaft 20. Furthermore, adjacent grinding wheels 10 are spaced apart; specifically, the spacing between two adjacent grinding wheels 10 is achieved by the aforementioned structural protrusions 15. The multiple grinding wheels 10 mounted on the support shaft 20 are constrained and fixed using snap rings.

[0033] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A grinding wheel for surface treatment of printed circuit boards, characterized in that: It includes a ring-shaped and elastic base portion and a plurality of grinding portions connected to and surrounding the base portion. The grinding portions are arranged in a solid block structure and contain more than 40% abrasive.

2. The grinding wheel for surface treatment of printed circuit boards according to claim 1, characterized in that, The grinding section has a square, trapezoidal, or columnar structure.

3. The grinding wheel for surface treatment of printed circuit boards according to claim 1, characterized in that, The base portion has multiple structural through holes, and the base portion is elastically set by relying on the structural through holes thereon.

4. The grinding wheel for surface treatment of printed circuit boards according to claim 3, characterized in that, The through holes in the structure are arranged in an arc shape.

5. The grinding wheel for surface treatment of printed circuit boards according to claim 3, characterized in that, All the structural through holes are bent in the same direction, and all the structural through holes are arranged in a circle on the base portion with the axis of the base portion as the center.

6. The grinding wheel for surface treatment of printed circuit boards according to claim 1, characterized in that, The base portion is provided with two rings of grinding portions arranged side by side along the axial direction, and the two rings of grinding portions are staggered.

7. The grinding wheel for surface treatment of printed circuit boards according to claim 1, characterized in that, The base portion encloses a circular through hole, and the sidewall of the base portion protrudes near the circular through hole to form a ring-shaped structural protrusion.

8. The grinding wheel for surface treatment of printed circuit boards according to claim 7, characterized in that, The base portion has multiple strip-shaped positioning protrusions extending from the side wall of the circular through hole. The positioning protrusions are parallel to the central axis of the base portion, and the multiple positioning protrusions are arranged at equal angles on the side wall of the circular through hole.

9. A grinding brush roller for surface treatment of printed circuit boards, characterized in that, It includes a bearing shaft and a plurality of grinding wheels as described in any one of claims 1-8, wherein the grinding wheels are fitted onto the bearing shaft and the plurality of grinding wheels are stacked on the bearing shaft along the axial direction of the bearing shaft.

10. The abrasive brush roller for surface treatment of printed circuit boards according to claim 9, characterized in that, The two adjacent grinding wheels are spaced apart.

Images