PCB grinding foaming non-woven fabric assembly not prone to chip falling

Abstract

The utility model relates to the technical field of PCB (printed circuit board) grinding, in particular to a foaming non-woven fabric component for PCB grinding not prone to chip falling, which comprises a grinding brush wheel composed of radial non-woven fabric and solidified polystyrene foam, annular indents are formed on the outer surfaces of two ends of the grinding brush wheel, an inner connecting pipe is fixedly connected to the inner surface of the grinding brush wheel, and the outer surface of the grinding brush wheel is fixedly connected with an outer connecting pipe. By means of the grinding brush wheel composed of the non-woven fabric and the solidified polystyrene foam, the PCB grinding brush wheel has the advantages of being not prone to chip falling and even in grinding when a PCB is ground, meanwhile, the fixing ring is fixed to the fixing rotating shaft through the fixing bolt, the grinding brush wheel is made of the non-woven fabric and the solidified polystyrene foam, the grinding brush wheel is not prone to chip falling and even in grinding, and therefore the PCB grinding brush wheel is not prone to chip falling and even in grinding. The end pressing rings are extruded and positioned at the two ends of the grinding brush wheel, the surface pressing rings are tightly arranged on the outer surfaces of the two ends of the grinding brush wheel in a sleeving mode, the stability of the grinding brush wheel can be guaranteed while the grinding brush wheel is conveniently replaced, and the grinding brush wheel is prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB grinding, in particular to a foamed non-woven fabric component for PCB grinding that is not prone to chip shedding. Background Art

[0002] PCB grinding refers to the process of removing burrs, protrusions, depressions and other defects on the PCB circuit board by grinding to make the surface flat and smooth, reduce contact resistance and improve signal transmission efficiency.

[0003] In the prior art, a non-woven brush wheel, such as that proposed in patent application number "CN201910312158.5", includes a grinding layer, and the grinding layer is an integral cylindrical grinding layer composed of multiple pieces of non-woven fabrics and solidified foamed rubber. The purpose of the present invention is to provide a non-woven brush wheel, the grinding layer of which is an integral structure, with uniform grinding, less chipping, and significantly improved service life.

[0004] However, in the above patent application, the grinding layer is directly fixed to the axis, and the outer side and both ends of the grinding layer lack positioning, which makes the grinding layer easy to loosen. At the same time, after the grinding layer is damaged after long-term use, it is not convenient to replace the grinding layer. Utility Model Content

[0005] The purpose of the utility model is to provide a foamed non-woven fabric component for PCB grinding that is not easy to shed, so as to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A foamed nonwoven fabric component for PCB grinding that is not easy to shed chips, including a grinding brush wheel composed of radial nonwoven fabric and cured foam glue, wherein the outer surfaces of both ends of the grinding brush wheel form an annular concave, and the inner surface of the grinding brush wheel is fixedly connected with an internal connecting tube, and both ends of the internal connecting tube protrude from the outside of the grinding brush wheel.

[0008] A fixed rotating shaft is arranged in the internal connecting tube, and both ends of the fixed rotating shaft pass through the internal connecting tube and extend to the outside of the internal connecting tube. Locking pieces are arranged at both ends of the grinding brush wheel, and the locking pieces include an end pressure ring and a surface pressure ring. The end pressure ring and the surface pressure ring are fixedly connected, the end pressure ring and the internal connecting tube are adapted, and the surface pressure ring and the annular concave are adapted.

[0009] Preferably, both ends of the fixed shaft are provided with annular openings, the side walls of the annular openings are provided with matching grooves in an annular array, and a fixing screw hole is provided at the center of the inner wall of the annular opening.

[0010] A fixing ring is arranged at one end of the end pressure ring, a through hole is arranged at the center of the fixing ring, a fixing bolt is arranged on the fixing ring, one end of the fixing bolt passes through the through hole and is threadedly connected with the fixing screw hole, so as to fix the fixing ring into the annular opening.

[0011] Preferably, the outer surface of the fixing ring is fixedly connected with a fixing connecting plate in an annular array, the side of the fixing connecting plate away from the fixing ring is fixedly connected to the end pressure ring, and the fixing connecting plate is adapted to the matching pressure groove.

[0012] Preferably, the inner surface of the end pressure ring is fixedly connected with a clamping protrusion in an annular array, and both ends of the internal connecting pipe are provided with clamping grooves in an annular array, and the clamping protrusions and the clamping grooves are arranged in a one-to-one correspondence.

[0013] Preferably, a fixed connection ear is fixedly connected to the outer surface of the fixed connecting plate, and a fixing hole is opened on the fixed connecting ear, and the fixing hole is used to assist in the connection between the fixed connecting plate and the external mechanism.

[0014] Beneficial effects of the utility model:

[0015] The utility model adopts a grinding brush wheel composed of non-woven fabric and cured foam rubber, which has the advantages of not easy to drop chips and uniform grinding when PCB grinding. At the same time, the fixing ring is fixed to the fixed rotating shaft by using fixing bolts, so that the end pressure rings are squeezed and positioned at the two ends of the grinding brush wheel, and the surface pressure rings are tightly sleeved on the outer surfaces of the two ends of the grinding brush wheel. While facilitating the replacement of the grinding brush wheel, the stability of the grinding brush wheel can be guaranteed to prevent the grinding brush wheel from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This utility model Figure 1 A schematic diagram of the structure of one end of the middle grinding brush wheel;

[0019] Figure 3 This utility model Figure 1 Schematic diagram of the structure of the middle surface pressure ring;

[0020] Figure 4 This utility model Figure 3 Side view of the mid-surface pressure ring.

[0021] The reference numerals in the figures are as follows:

[0022] 1. Grinding brush wheel, 2. Annular concave, 3. Internal connecting pipe, 4. Fixed rotating shaft, 5. End pressure ring, 6. Surface pressure ring, 7. Matching pressure groove, 8. Fixed screw hole, 9. Fixed ring, 10. Fixed bolt, 11. Fixed connecting plate, 12. Clamping protrusion, 13. Clamping groove, 14. Fixed connecting ear. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] A foamed nonwoven fabric component for PCB grinding that is not easy to shed chips, comprising a grinding brush wheel 1 composed of radial nonwoven fabric and cured foam glue, wherein the outer surfaces of both ends of the grinding brush wheel 1 form annular concave portions 2, and the inner surface of the grinding brush wheel 1 is fixedly connected with an internal connecting tube 3, and both ends of the internal connecting tube 3 protrude from the outside of the grinding brush wheel 1.

[0025] A fixed rotating shaft 4 is arranged in the internal connecting tube 3, and both ends of the fixed rotating shaft 4 pass through the internal connecting tube 3 and extend to the outside of the internal connecting tube 3. Locking pieces are arranged at both ends of the grinding brush wheel 1, and the locking pieces include an end pressure ring 5 and a surface pressure ring 6. The end pressure ring 5 and the surface pressure ring 6 are fixedly connected, the end pressure ring 5 and the internal connecting tube 3 are adapted, and the surface pressure ring 6 and the annular concave 2 are adapted.

[0026] like Figure 1 The grinding brush wheel 1 is formed by a non-woven fabric plane being wound onto the surface of an internal connecting tube 3, immersed in a foaming agent, and heated and solidified. Both ends of the non-woven fabric plane are thin surfaces, so that an annular concave 3 appears on the surface of the grinding brush wheel 1. The fixed shaft 4 passes through the internal connecting tube 3, and two locking pieces are symmetrically arranged at both ends of the fixed shaft 4.

[0027] Both ends of the fixed rotating shaft 4 are provided with annular openings, the side walls of the annular openings are provided with matching pressing grooves 7 in an annular array, and the center of the inner wall of the annular opening is provided with a fixing screw hole 8.

[0028] like Figure 1 and Figure 2 The center of the annular opening, the center of the fixed shaft 4 and the fixed screw hole 8 are all located in the same horizontal direction.

[0029] A fixing ring 9 is provided at one end of the end pressure ring 5, a through hole is provided at the center of the fixing ring 9, a fixing bolt 10 is provided on the fixing ring 9, one end of the fixing bolt 10 passes through the through hole and is threadedly connected to the fixing screw hole 8, so as to fix the fixing ring 9 into the annular opening.

[0030] like Figure 2 and Figure 3 When the fixing ring 9 is located in the annular opening, the through hole thereon and the fixing screw hole 8 are aligned together, so that the fixing bolt 10 can pass through the fixing ring 9 from the through hole and be threadedly connected to the fixing screw hole 8 to fix the fixing ring 9 to the fixed shaft 4.

[0031] The outer surface of the fixing ring 9 is fixedly connected with a fixing connecting plate 11 in an annular array. The side of the fixing connecting plate 11 away from the fixing ring 9 is fixedly connected to the end pressing ring 5 , and the fixing connecting plate 11 is adapted to the matching pressing groove 7 .

[0032] like Figure 2 and Figure 3 When the fixing ring 9 is fixed to the annular opening of the fixed rotating shaft 4 , the fixing connecting plate 11 can be fixed to the matching pressing groove 7 .

[0033] The inner surface of the end pressure ring 5 is fixedly connected with a clamping protrusion 12 in an annular array, and both ends of the internal connecting pipe 3 are provided with clamping grooves 13 in an annular array, and the clamping protrusions 12 and the clamping grooves 13 are arranged in a one-to-one correspondence.

[0034] like Figure 2 and Figure 3 When the end pressure ring 5 is sleeved onto the internal connecting pipe 3, the clamping protrusion 12 and the clamping groove 13 are clamped together.

[0035] The outer surface of the fixed connecting plate 11 is fixedly connected with a fixed connecting ear 14 , and the fixed connecting ear 14 is provided with a fixing hole, which is used to assist in the connection between the fixed connecting plate 11 and an external mechanism.

[0036] like Figure 3 and Figure 4 The external driving mechanism can be fixed by the assistance of the fixing hole and the fixed connecting ear 14, so that the external driving mechanism can drive the fixed connecting plate 11 to rotate, and the entire locking piece rotates accordingly. The locking piece and the fixed rotating shaft 4 are fixed, driving the fixed rotating shaft 4 to rotate, and the end pressure ring 5 drives the internal connecting tube 3 and the grinding brush wheel 1 to rotate to grind the PCB.

[0037] The working principle of the foamed non-woven fabric component for PCB grinding that is not easy to drop chips provided by the utility model is as follows:

[0038] When the fixed shaft 4 passes through the inside of the grinding brush wheel 1, the fixing ring 9 can be fixed to the fixed shaft 4 by the fixing bolt 10. At this time, the fixing connecting plate 11 is inserted into the inner side of the matching groove 7, so that the fixing ring 9 will not rotate relative to the fixed shaft 4.

[0039] The surface pressing ring 6 is now tightly sleeved onto the annular concave 2, and the two ends of the grinding brush wheel 1 are tightened to prevent the grinding wheel 1 from being sent to the surface of the internal connecting tube 3, and squeezed on the two ends of the grinding brush wheel 1, and the grinding brush wheel 1 is positioned from both ends. At the same time, the clamping protrusion 12 and the clamping groove 13 are clamped together, so that the end pressing ring 5 can rotate together with the internal connecting tube 3;

[0040] On the contrary, when removing the fixing bolt 10, the locking piece can be pulled away from the fixed shaft 4 to separate the locking piece and the fixed shaft 4, and then the fixed shaft 4 can be pulled out from the internal connecting tube 3, and a new grinding brush wheel 1 and the internal connecting tube 3 can be replaced and put on the fixed shaft 4.

[0041] Compared with the related art, the foamed non-woven fabric component for PCB grinding that is not easy to drop chips provided by the utility model has the following beneficial effects:

[0042] The utility model uses a grinding brush wheel 1 composed of non-woven fabric and cured foamed adhesive, which has the advantages of not easy to drop chips and uniform grinding when PCB grinding. At the same time, a fixing ring 9 is fixed to a fixed shaft 4 by a fixing bolt 10, so that the end pressure rings 5 ​​are squeezed and positioned at the two ends of the grinding brush wheel 1, and the surface pressure rings 6 are tightly sleeved on the outer surfaces of the two ends of the grinding brush wheel 1. While facilitating the replacement of the grinding brush wheel 1, the stability of the grinding brush wheel 1 can be guaranteed to prevent the grinding brush wheel 1 from loosening.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A foamed nonwoven fabric component for PCB grinding that is not easy to shed, comprising a grinding brush wheel (1) composed of a radial nonwoven fabric and a cured foamed adhesive, characterized in that: The outer surfaces of both ends of the grinding brush wheel (1) form an annular concave (2), the inner surface of the grinding brush wheel (1) is fixedly connected to an internal connecting tube (3), and both ends of the internal connecting tube (3) protrude outside the grinding brush wheel (1); A fixed rotating shaft (4) is arranged inside the internal connecting tube (3), and both ends of the fixed rotating shaft (4) penetrate the internal connecting tube (3) and extend to the outside of the internal connecting tube (3). Locking pieces are arranged at both ends of the grinding brush wheel (1), and the locking pieces include an end pressure ring (5) and a surface pressure ring (6). The end pressure ring (5) and the surface pressure ring (6) are fixedly connected, the end pressure ring (5) and the internal connecting tube (3) are matched, and the surface pressure ring (6) and the annular concave (2) are matched.

2. The non-chip-resistant foamed non-woven fabric component for PCB grinding according to claim 1, characterized in that: Both ends of the fixed rotating shaft (4) are provided with annular openings, the side walls of the annular openings are provided with matching pressing grooves (7) in an annular array, and the center of the inner wall of the annular opening is provided with a fixing screw hole (8).

3. The non-chip-resistant foamed non-woven fabric component for PCB grinding according to claim 2, characterized in that: A fixing ring (9) is provided at one end of the end pressure ring (5), a through hole is provided at the center of the fixing ring (9), a fixing bolt (10) is provided on the fixing ring (9), one end of the fixing bolt (10) passes through the through hole and is threadedly connected to the fixing screw hole (8), so as to fix the fixing ring (9) into the annular opening.

4. The foamed nonwoven fabric component for PCB grinding that is not easy to drop chips according to claim 3 is characterized in that: The outer surface of the fixing ring (9) is fixedly connected with a fixing connecting plate (11) in an annular array, and the fixing connecting plate (11) is fixedly connected to the end pressure ring (5) at a side away from the fixing ring (9), and the fixing connecting plate (11) is matched with the matching pressure groove (7).

5. The non-chip-resistant foamed non-woven fabric component for PCB grinding according to claim 1, characterized in that: The inner surface of the end pressure ring (5) is fixedly connected with a clamping protrusion (12) in an annular array, and both ends of the internal connecting pipe (3) are provided with clamping grooves (13) in an annular array, and the clamping protrusions (12) and the clamping grooves (13) are arranged in a one-to-one correspondence.

6. The non-chip-resistant foamed non-woven fabric component for PCB grinding according to claim 4, characterized in that: The outer surface of the fixed connecting plate (11) is fixedly connected with a fixed connecting ear (14), and a fixing hole is provided on the fixed connecting ear (14). The fixing hole is used to assist in the connection between the fixed connecting plate (11) and an external mechanism.

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