CN110695867A

CN110695867A - Abrasive cloth wheel

Info

Publication number: CN110695867A
Application number: CN201910956986.2A
Authority: CN
Inventors: 谢泽
Original assignee: MIANYANG ZHONGYAN GRINDING TOOLS CO Ltd
Current assignee: MIANYANG ZHONGYAN GRINDING TOOLS CO Ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-01-17

Abstract

The invention discloses an abrasive cloth wheel which comprises a carrier and abrasive cloth sheets attached to the carrier, and is characterized in that Sin alpha is (1+ k) (D x N/2 pi R), k is as for-0.2, -0.3] ∪ [0.2,0.3], wherein D is the thickness of a single abrasive cloth sheet, N is the total number of the abrasive cloth wheels attached to a plane grinding wheel, R is the inner circle radius of the plane abrasive cloth wheel, and k is a correction coefficient.

Description

Abrasive cloth wheel

Technical Field

The invention relates to the technical field of grinding and polishing processing tools, in particular to a plane abrasive cloth wheel for grinding and polishing the surfaces of metal materials and non-metal materials.

Background

A flat abrasive cloth wheel is a tool for polishing and grinding the surface of a metal or nonmetal material, and an arrow is arranged on an abrasive cloth sheet to indicate the processing and running direction of the abrasive cloth sheet in the process of manufacturing the flat abrasive cloth wheel.

The prior plane abrasive cloth wheel generally adopts abrasive cloth which is sequentially overlapped and annularly arranged on the surface of a carrier, as disclosed in a patent No. 200710049576.7, the abrasive cloth sheets and the carrier are arranged according to a certain included angle, so that the grinding ratio and the grinding efficiency of the plane abrasive cloth wheel are improved and the service life of the plane abrasive cloth wheel is prolonged during grinding and polishing treatment; meanwhile, the conditions of abrasive cloth wheel fragments and flying fragments are reduced.

However, in practice, the abrasive cloth wheel designed and manufactured according to the formula in the above patent still has the problems of chipping, flying, and low grinding rate.

Aiming at the problems, a more excellent novel abrasive cloth wheel is provided.

Disclosure of Invention

The invention aims to: aiming at the problems, the abrasive cloth wheel is provided, and the problems of broken pieces, flying pieces and low grinding rate of the existing abrasive cloth wheel are solved.

The invention is realized by the following scheme:

an abrasive cloth wheel comprises a carrier and an abrasive cloth sheet attached to the carrier, wherein the included angle alpha between the abrasive cloth sheet and the plane where the carrier is located conforms to the following formula:

where D is the thickness of a single sheet of cloth, N is the total number of the cloth wheels attached to the flat grinding wheel, R is the radius of the inner circle of the flat grinding wheel, and k is a correction factor.

Preferably, the abrasive cloth pieces are annularly arranged along the inner circle of the plane abrasive cloth wheel, and the abrasive cloth wheels are sequentially overlapped on the circumference of the inner circle.

Preferably, the side edge of the grinding wheel is not collinear with the radial direction of the circular carrier.

Preferably, the center of the abrasive cloth piece carrier is provided with a fixed ring, the fixed ring comprises a center clamping ring and an edge clamping ring, the edge clamping ring is uniformly arranged on the fixed ring, and the edge clamping ring is at least provided with 3 clamping rings.

Preferably, the abrasive cloth sheet covers the surface of the carrier in an area not less than half the area of the surface of the carrier.

Preferably, the two adjacent abrasive cloth pieces are fixed on the carrier by adhesive at one end, and the end part of the other end, which is not positioned on the carrier, is in a non-adhesive state.

Preferably, the included angle α between the abrasive cloth sheet 2 and the plane of the carrier 1 gradually increases along the length direction of the abrasive cloth sheet.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the correction coefficient is added to the original formula, so that errors caused by the unevenness between the grinding wheel and the grinding wheel, errors caused by the deflection of the grinding wheel, and deviations generated after the multiple grinding wheels are overlapped due to the non-uniform thickness of the grinding wheel are compensated, thereby truly reducing the occurrence of the broken and flying conditions of the abrasive cloth wheel, improving the integral grinding rate and having stronger actual use effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the angle between the plane of the abrasive cloth sheet and the carrier in the present invention;

the labels in the figure are: 1 is a carrier, 2 is an abrasive cloth piece, and 3 is an eccentric distance between the abrasive cloth piece and the inner circle of the carrier.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.

Example 1

As shown in fig. 1-2, an abrasive cloth wheel comprises a carrier 1 and an abrasive cloth sheet 2 attached to the carrier, wherein the included angle alpha between the abrasive cloth sheet and the plane of the carrier is in accordance with the following formula:

and Sin alpha is (1+ k) (D x N/2 pi R), k is as for-0.2, -0.3] ∪ [0.2,0.3], wherein D is the thickness of a single abrasive cloth piece, N is the total number of the abrasive cloth wheels attached to the plane grinding wheel, R is the inner circle radius of the plane abrasive cloth wheel, and k is a correction coefficient.

The abrasive cloth pieces are annularly arranged along the inner circle of the plane abrasive cloth wheel, and the abrasive cloth wheel is sequentially overlapped on the circumference of the inner circle.

The side edge of the grinding wheel is not collinear with the radius direction of the round carrier.

The emery cloth piece carrier center is provided with the retaining ring, the retaining ring includes central joint circle and edge joint circle, edge joint circle evenly sets up on the retaining ring, edge joint ring sets up 3 at least.

The area of the abrasive cloth sheet covering the surface of the carrier is not less than half of the surface of the carrier.

One end of each two adjacent abrasive cloth pieces on the carrier is fixed by adhesive, and the end part of the other end, which is not positioned on the carrier, is in a non-adhesive state.

The included angle alpha between the plane of the abrasive cloth sheet 2 and the plane of the carrier 1 is gradually increased along the length direction of the abrasive cloth sheet.

As seen from the formula of 200710049576.7, which is disclosed in the patent application No. 200710049576.7, for calculating the angle α between the abrasive cloth sheet and the plane of the carrier, there are many disadvantages and defects, which are not solved effectively in the patent, and it should be particularly noted that the above patent is also proposed by the present inventor and applied in 2007, and the technical solution is obtained after 20 years of continuous production improvement.

The 200710049576.7 patent and the related prior art patents have disadvantages mainly caused by the following reasons;

1. because the abrasive cloth wheel is composed of a plurality of abrasive cloth pieces, the number of the abrasive cloth pieces is generally different from 45 to 150 pieces according to the different diameters of the inner circle, in the actual manufacturing process, the thickness of each abrasive cloth piece cannot be completely the same, the thickness of each abrasive cloth piece is not uniform due to different manufacturing processes, different manufacturing materials and different stress degrees, the thicknesses of the abrasive cloth pieces are only approximately the same, the error of each abrasive cloth piece is a few tenths of millimeters, since the number of abrasive cloth pieces is sufficiently large to be distributed on the carrier, a relatively large deviation of the error value occurs, while the formula for calculating the included angle alpha in the patent application No. 200710049576.7 selects an ideal emery cloth thickness, that is, the thickness of each grinding wheel cloth is the same by default, the angle calculated according to the application is necessarily an ideal value, and the deviation of the included angle is corrected through manufacturing experience and research and development of the inventor for many years.

2. Because the adjacent grinding wheels are bonded by the adhesive, the grinding surface of the first grinding wheel is in contact with the back base layer of the second grinding wheel, the grinding particles on the grinding wheels are completely covered on the substrate, the grinding particles are different in size, angle and bonding position, so that when the grinding surface is in contact with the back base layer, the deviation angle of each grinding wheel is difficult to unify, the grinding wheels always deflect due to the collision of the grinding particles, because the adhesive is a triangular bonding area formed between the grinding wheels and the substrate, namely one end of the grinding wheel is fixed, because the grinding particles collide with the back base layer of the grinding wheels, particularly the grinding stones close to the bonding area collide with the back base layer, and because the grinding wheels are arranged in a fan-shaped outward radiation mode, the angle of the grinding wheels is changed due to small collision in the bonding area, the end of the grinding wheel is enlarged, so that the abrasive cloth wheel obtained by the formula for calculating the included angle alpha in the patent with the application number of 200710049576.7 is difficult to achieve the perfect effect, and the conditions of fragments and flying fragments still occur.

3. Because the grinding wheel is not regularly arranged on the carrier along the radial direction, but for better enhancing the grinding effect, the inclined eccentric arrangement is adopted, namely the side edge of the grinding wheel is not collinear with the radius of the circular carrier, so that the grinding area can be increased, but the inclined eccentric arrangement causes that the thickness of the abrasive cloth piece in the formula for calculating the included angle alpha in the patent with the application number of 200710049576.7 is measured and calculated according to the actual thickness of the abrasive cloth piece, and the actual condition is that the calculation formula of the included angle alpha is determined according to the ratio of the opposite side and the oblique side of the included angle alpha, under the ideal condition, the thickness of the gauze piece with the approximate length of the opposite side can be calculated, but actually, the thickness of the abrasive cloth piece is calculated in the inclined eccentric arrangement process, for the opposite side of the included angle alpha, the value of the opposite side is not the thickness of the abrasive cloth piece, but is a value slightly less than the thickness of the abrasive cloth piece, this introduces an error in the formula. Therefore, the arrangement position of the abrasive cloth wheel in the actual product manufacturing process is influenced, and finally, the finished product still has the problems of flying and breaking to a certain degree.

In conclusion, due to the introduction of triple errors, the formula for calculating the included angle α in the patent with the application number of 200710049576.7 is affected, so that the yield and the grinding efficiency of the flat abrasive cloth wheel manufactured by the formula are reduced.

In this case, the inventor empirically summarized the design and manufacture for more than 20 years and found that the included angle α of the actually manufactured sanding sheet with good performance is deviated from the included angle α calculated by the formula for calculating the included angle α in the patent with application No. 200710049576.7, and the first patent in the following table is the patent with application No. 200710049576.7.

The specific deviation data are as follows:

through a plurality of tests and calculation data, the fact that the optimum included angle alpha always has a deviation value with the included angle alpha calculated by the formula for calculating the included angle alpha in the patent with the application number of 200710049576.7 is that the deviation value is plus or minus (20 percent to 30 percent), so that a correction coefficient k is obtained, and the grinding efficiency and the service life of the abrasive cloth wheel obtained through the new formula are greatly improved.

The specific manufacturing steps of the plane abrasive cloth wheel are as follows:

1. the cut abrasive cloth pieces 2 are arranged into a ring shape according to the following conditions:

(1) the direction of an arrow attached to the abrasive cloth sheet is outward;

(2) the eccentricity is 1/2 pieces wide;

(3) the angle α formed by the abrasive cloth sheet 2 and the plane of the carrier 1 corresponds to the above formula Sin α ═ (1+ k) (D × N/2 pi R), k ∈ [ -0.2, -0.3] ∪ [0.2,0.3], and the numerical relationship can be as shown in the above table.

2. The carrier coated with resin is covered to adhere the abrasive cloth sheet to the carrier.

3. And putting the product into a curing oven for curing.

In order to verify the technical effect of the invention, a comparative grinding test is carried out on the plane abrasive cloth wheel with the structure and the existing plane abrasive cloth wheel with the general structure by adopting the typical data in the table.

In both cases, the same batch of No. 60 abrasive cloth was used as a flat abrasive cloth wheel, and the same specification iron was used as an object to be ground to perform a grinding test, and the following test data were obtained:

note: the first patent is the patent with application number 200710049576.7

Obviously, the comparison data in the table show that, compared with the prior art, the grinding ratio of the grinding machine is improved from 39g/g to 51g/g, the grinding efficiency is still maintained at 10g/m (g/min), the service life is improved from 60 min to 80 min, compared with the prior patent product, the grinding efficiency is maintained unchanged, other indexes are obviously improved, and the phenomena of fragment and flyover are effectively avoided.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. An abrasive cloth wheel comprises a carrier and abrasive cloth pieces attached to the carrier, and is characterized in that an included angle alpha between the abrasive cloth pieces (2) and a plane where the carrier (1) is located meets the following formula, wherein Sin alpha is (1+ k) (D x N/2 pi R), k belongs to the range of-0.2, -0.3 and ∪ [0.2 and 0.3], D is the thickness of a single abrasive cloth piece, N is the total number of the abrasive cloth wheels attached to a plane grinding wheel, R is the inner circle radius of the plane abrasive cloth wheel, and k is a correction coefficient.

2. An abrasive cloth wheel according to claim 1, characterized in that: the abrasive cloth pieces are annularly arranged along the inner circle of the plane abrasive cloth wheel, and the abrasive cloth wheel is sequentially overlapped on the circumference of the inner circle.

3. An abrasive cloth wheel according to claim 1 or 2, characterized in that: the side edge of the grinding wheel is not collinear with the radius direction of the round carrier.

4. An abrasive cloth wheel according to claim 1 or 2, characterized in that: the area of the abrasive cloth sheet covering the surface of the carrier is not less than half of the area of the surface of the carrier.

5. An abrasive cloth wheel according to claim 4, characterized in that: one end of each two adjacent abrasive cloth pieces on the carrier is fixed by adhesive, and the end part of the other end, which is not positioned on the carrier, is in a non-adhesive state.

6. An abrasive cloth wheel according to claim 1, 2 or 5, characterized in that: the included angle alpha between the plane where the abrasive cloth sheet (2) and the carrier (1) are located is gradually increased along the length direction of the abrasive cloth sheet.