Improved disc sandpaper and grinding equipment with the disc sandpaper

Abstract

The present invention relates to the technical field of grinding equipment, and in particular to an improved disc sandpaper and a grinding equipment with the disc sandpaper, which comprises a sandpaper body, on the grinding surface of the sandpaper body, a plurality of circles of main opening groups distributed along the radial direction of the sandpaper body are sequentially arranged, each circle of the main opening group comprises a plurality of main openings arranged at equal intervals, the plurality of main openings in each circle of the main opening group are distributed along the circumferential direction of the sandpaper body, the number of main openings in each circle of the main opening group increases sequentially from the inner circle to the outer circle, and the main openings penetrate the sandpaper body. The present invention ensures that the main openings can cover the entire grinding surface of the sandpaper as much as possible by providing a plurality of circles of main opening groups distributed along the radial direction of the sandpaper on the sandpaper body, reducing the sandpaper clogging phenomenon caused by uneven opening distribution, and extending the service life of the sandpaper.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, in particular to an improved disc sandpaper and a grinding equipment with the disc sandpaper. Background Art

[0002] At present, disc sandpaper is often used for polishing car paint. Since polishing will generate a lot of dust, and the polishing method is usually dry grinding, the existing disc sandpaper is easily clogged by dust, thereby reducing the grinding life. The current solution to this problem is mainly to open holes on the disc sandpaper and achieve chip removal through these holes. However, most of the existing sandpapers do not have reasonable holes, and there are problems such as a small number of holes and uneven distribution of holes in different areas of the sandpaper, which leads to the phenomenon that clogging is still easy to occur in the unopened areas. Summary of the invention

[0003] The present invention aims at solving the problems of the prior art and provides an improved disc sandpaper and a grinding device with the disc sandpaper, so as to solve the problem that clogging is still easy to occur in the non-perforated area due to the small number of openings and the uneven distribution of holes in various areas on the sandpaper in the prior art.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides an improved disc sandpaper, comprising a sandpaper body, wherein a plurality of circles of main opening groups distributed along the radial direction of the sandpaper body are sequentially arranged on the grinding surface of the sandpaper body, wherein each circle of the main opening group comprises a plurality of main openings arranged at equal intervals, wherein the plurality of main openings in each circle of the main opening group are distributed along the circumferential direction of the sandpaper body, and the number of main openings in each circle of the main opening group increases sequentially from the inner circle to the outer circle, and the main openings penetrate the sandpaper body.

[0006] Wherein, the area of ​​the main opening group is 4% to 9% of the area of ​​the grinding surface of the sandpaper body.

[0007] The main opening group includes a first circle main opening group, a second circle main opening group and a third circle main opening group arranged in sequence on the grinding surface of the sandpaper body along the direction from the inner circle to the outer circle of the sandpaper body;

[0008] The distance between the center of the main opening of the first circle main opening group and the center of the sandpaper body is 15% to 23% of the diameter of the grinding surface of the sandpaper body. The number of main openings in the first circle main opening group is 2 to 6, and the hole diameter is 3 to 8 mm.

[0009] The distance between the center of the main opening of the second circle main opening group and the center of the sandpaper body is 30% to 39% of the diameter of the grinding surface of the sandpaper body. The number of main openings in the second circle main opening group is 8 to 14, and the hole diameter is 3 to 8 mm.

[0010] The distance from the center of the main openings of the third circle main opening group to the center of the sandpaper body is 65% to 80% of the diameter of the grinding surface of the sandpaper body. The number of main openings in the third circle main opening group is 16 to 28, and the hole diameter is 3 to 8 mm.

[0011] Among them, at least one circle of auxiliary opening groups is also arranged on the grinding surface of the sandpaper body, and multiple auxiliary openings are arranged in the auxiliary opening group. The multiple auxiliary openings are distributed along the circumferential direction of the sandpaper body. The multiple auxiliary openings include at least two auxiliary openings with different diameters, and the auxiliary openings run through the sandpaper body.

[0012] Wherein, the distance from the center of the auxiliary opening to the center of the sandpaper body is 40% to 65% of the diameter of the grinding surface of the sandpaper body.

[0013] The plurality of auxiliary openings include first diameter openings and second diameter openings that are equally spaced.

[0014] Among them, the number of the first diameter openings is 4 to 8, and the diameter of the first diameter openings is 5 to 10 mm; the number of the second diameter openings is 4 to 8, and the diameter of the second diameter openings is 3 to 6 mm.

[0015] The main openings and the auxiliary openings are symmetrically distributed about an axis passing through the center of the sandpaper body and radially distributed along the sandpaper body, and the symmetry axis of the main openings does not coincide with the symmetry axis of the auxiliary openings.

[0016] The areas of the main openings and the auxiliary openings are 6% to 12% of the area of ​​the grinding surface of the sandpaper body.

[0017] A grinding device with the disc sandpaper comprises a rotatable grinding head, and the sandpaper body is fixed at the output end of the grinding head.

[0018] Beneficial effects of the present invention:

[0019] The invention provides a plurality of main opening groups radially distributed on the sandpaper body to ensure that the main openings can cover the entire grinding surface of the sandpaper as much as possible, reduce the clogging of the sandpaper caused by uneven opening distribution, and extend the service life of the sandpaper. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] exist Figure 1 Reference numerals in the drawings include:

[0022] 1—Sandpaper body 2—Main opening 3—First circle main opening group

[0023] 4—Second circle main opening group 5—Third circle main opening group 6—Auxiliary opening

[0024] 7—first diameter opening 8—second diameter opening. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and the accompanying drawings. The contents mentioned in the embodiments are not limitations of the present invention. The present invention is described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict.

[0026] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, front, back, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0027] In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments, not for limiting the present invention. The term "and / or" used herein includes any combination of one or more related listed items.

[0028] A modified disc sandpaper, such as Figure 1 , the dotted lines in the figure represent the distribution trajectory of each circle of openings. This embodiment includes a sandpaper body 1, and a plurality of circles of main opening groups distributed along the radial direction of the sandpaper body 1 are sequentially arranged on the grinding surface of the sandpaper body 1. Each circle of the main opening group includes a plurality of main openings 2 arranged at equal intervals. The plurality of main openings 2 in each circle of the main opening group are distributed along the circumferential direction of the sandpaper body 1. The number of main openings 2 in each circle of the main opening group increases sequentially from the inner circle to the outer circle, and the main openings 2 pass through the sandpaper body 1. Specifically, the main structure of the sandpaper body 1 adopts the existing technology, that is, it includes a base material layer and a grinding layer attached to the base material layer, and the surface of the grinding layer with abrasive particles attached is called a grinding surface. The base material layer, the grinding layer, and the abrasive particles are all existing technologies, and the present invention will not describe them in detail.

[0029] Specifically, the “circumferential distribution” referred to in the present invention means that the distribution trajectory of the main openings 2 is parallel to the circumference of the sandpaper body 1, but does not mean that the diameter of the distribution trajectory of the main openings 2 is equivalent to the diameter of the sandpaper body 1. In fact, the distribution trajectories of multiple main opening groups are multiple concentric circles of different sizes.

[0030] In this embodiment, the number of main openings 2 included in each circle increases in sequence from the inner circle to the outer circle, ensuring that the main openings 2 included in each circle have a reasonable density, thereby ensuring that the main openings 2 can cover the entire sandpaper grinding surface as much as possible, reducing the sandpaper clogging caused by uneven opening distribution, and extending the service life of the sandpaper. In order to ensure the chip removal ability of the sandpaper and avoid affecting the sandpaper grinding ability due to too many openings, in this embodiment, the area of ​​the main opening group is 4% to 9% of the area of ​​the grinding surface of the sandpaper body 1, preferably 6.6%.

[0031] The main opening group includes a first circle main opening group 3, a second circle main opening group 4 and a third circle main opening group 5 arranged in sequence on the grinding surface of the sandpaper body 1 along the direction from the inner circle to the outer circle of the sandpaper body 1;

[0032] The distance between the center of the main opening 2 of the first circle main opening group 3 and the center of the sandpaper body 1 is 15% to 23%, preferably 18%, of the diameter of the grinding surface of the sandpaper body 1. The number of the main openings 2 in the first circle main opening group 3 is 2 to 6, preferably 4, and the aperture is 3 to 8 mm, preferably 5 mm.

[0033] The distance between the center of the main opening 2 of the second circle main opening group 4 and the center of the sandpaper body 1 is 30% to 39%, preferably 35%, of the diameter of the grinding surface of the sandpaper body 1. The number of the main openings 2 in the second circle main opening group 4 is 8 to 14, preferably 12, and the aperture is 3 to 8 mm, preferably 5 mm.

[0034] The distance from the center of the main opening 2 of the third circle main opening group 5 to the center of the sandpaper body 1 is 65% to 80%, preferably 72%, of the diameter of the grinding surface of the sandpaper body 1. The number of main openings 2 in the third circle main opening group 5 is 16 to 28, preferably 24, and the aperture is 3 to 8 mm, preferably 5 mm.

[0035] In addition, the present invention has been verified through multiple experiments, and 400# sandpaper is used to polish automobile paint for verification. The non-porous disc sandpaper is blocked at 45 seconds, the ordinary 8-hole disc sandpaper is blocked at 60 seconds, and the disc sandpaper with the above-mentioned open hole design is blocked at 75 seconds, and its grinding amount is almost unaffected compared with ordinary sandpaper. Therefore, the present invention can effectively improve the anti-blocking effect of sandpaper on the basis of ensuring the polishing ability.

[0036] In this embodiment, in the present invention, the diameters of the main openings 2 of each ring may be the same or different.

[0037] In this embodiment, at least one circle of auxiliary opening groups is provided on the grinding surface of the sandpaper body 1, and a plurality of auxiliary openings 6 are provided in the auxiliary opening group. The plurality of auxiliary openings 6 are distributed along the circumferential direction of the sandpaper body 1, and the plurality of auxiliary openings 6 include at least two auxiliary openings 6 of different diameters, and the auxiliary openings 6 run through the sandpaper body 1.

[0038] In this embodiment, the plurality of auxiliary openings 6 include first diameter openings 7 and second diameter openings 8 that are equally spaced. Among them, the number of the first diameter openings 7 is 4 to 8, preferably 6, and the aperture of the first diameter openings 7 is 5 to 10 mm, preferably 8 mm; the number of the second diameter openings 8 is 4 to 8, preferably 6, and the aperture of the second diameter openings 8 is 3 to 6 mm, preferably 5 mm. The purpose of setting auxiliary openings 6 of different diameters is that: under the same distribution density, the cross distribution of the first diameter openings 7 and the second diameter openings 8 can take into account both the chip removal capacity and the grinding capacity, avoiding the problem of poor chip removal that may be caused when small holes are used for chip removal, and reducing the impact on the actual grinding area when large holes are used for chip removal. Among them, the area of ​​the main openings 2 and the auxiliary openings 6 is 6% to 12% of the area of ​​the grinding surface of the sandpaper body 1, preferably 8.9%.

[0039] Since the debris is mainly concentrated on the middle circle and outer circle of the sandpaper body 1 under the influence of centrifugal force, the auxiliary openings 6 are preferably distributed on the middle circle and outer circle of the sandpaper. Specifically, the distance from the center of the auxiliary opening 6 to the center of the sandpaper body 1 is 40% to 65%, preferably 52%, of the diameter of the grinding surface of the sandpaper body 1. In this embodiment, the auxiliary openings 6 are located between the second circle main opening group 4 and the third circle main opening group 5.

[0040] In this embodiment, the diameters of the main openings 2 and the second diameter openings 8 are equal, which helps to reduce the number of processing steps.

[0041] In addition, in this embodiment, the main opening 2 and the auxiliary opening 6 are symmetrically distributed along the axis passing through the center of the sandpaper body 1 and radially distributed along the sandpaper body 1, and the symmetry axis of the main opening 2 does not coincide with the symmetry axis of the auxiliary opening 6. That is, from the perspective of the main opening 2 and the auxiliary opening 6 as a whole, the openings on the sandpaper body 1 are neither axisymmetric nor centrally symmetrical, which can effectively disperse stress and prevent the sandpaper from bending, folding, and breaking.

[0042] A grinding device with the disc sandpaper comprises a rotatable grinding head, wherein the sandpaper body 1 is fixed at the output end of the grinding head, and as the grinding head rotates, the disc sandpaper can synchronously rotate for grinding.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A grinding device with a disc sandpaper, characterized in that: The invention comprises a rotatable grinding head, wherein the disc sandpaper comprises a sandpaper body, and the sandpaper body is fixed at the output end of the grinding head; a plurality of circles of main opening groups distributed along the radial direction of the sandpaper body are sequentially arranged on the grinding surface of the sandpaper body, each circle of the main opening group comprises a plurality of main openings arranged at equal intervals, the plurality of main openings in each circle of the main opening group are distributed along the circumferential direction of the sandpaper body, the number of main openings in each circle of the main opening group increases sequentially from the inner circle to the outer circle, and the main openings penetrate the sandpaper body; The area of ​​the main opening group is 4% to 9% of the area of ​​the grinding surface of the sandpaper body; The grinding surface of the sandpaper body is provided with a first circle main opening group, a second circle main opening group and a third circle main opening group in sequence from the inner circle to the outer circle of the sandpaper body; The distance between the center of the main opening of the first circle main opening group and the center of the sandpaper body is 15% to 23% of the diameter of the grinding surface of the sandpaper body. The number of main openings in the first circle main opening group is 2 to 6, and the hole diameter is 5 mm. The distance between the center of the main opening of the second circle main opening group and the center of the sandpaper body is 30% to 39% of the diameter of the grinding surface of the sandpaper body. The number of main openings in the second circle main opening group is 8 to 14, and the hole diameter is 5 mm. The distance between the center of the main opening of the third circle main opening group and the center of the sandpaper body is 65% to 80% of the diameter of the grinding surface of the sandpaper body. The number of main openings in the third circle main opening group is 16 to 28, and the hole diameter is 5 mm. The grinding surface of the sandpaper body is also provided with at least one circle of auxiliary opening groups, wherein the auxiliary opening groups are provided with a plurality of auxiliary openings, the plurality of auxiliary openings are distributed along the circumferential direction of the sandpaper body, the plurality of auxiliary openings include at least two auxiliary openings of different diameters, and the auxiliary openings penetrate the sandpaper body; The distance from the center of the auxiliary opening to the center of the sandpaper body is 40% to 65% of the diameter of the grinding surface of the sandpaper body; The plurality of auxiliary openings include openings of a first diameter and openings of a second diameter that are equally spaced; The main opening and the auxiliary opening are symmetrically distributed about the center of a circle passing through the sandpaper body and along the radial distribution axis of the sandpaper body, and the symmetry axis of the main opening does not coincide with the symmetry axis of the auxiliary opening; The number of the first diameter openings is 4 to 8, and the diameter of the first diameter openings is 5 to 10 mm; the number of the second diameter openings is 4 to 8, and the diameter of the second diameter openings is 3 to 6 mm; The areas of the main openings and the auxiliary openings are 6% to 12% of the area of ​​the grinding surface of the sandpaper body.

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