JPH03501371A - Abrasive products with less abrasive particles - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Abrasive products with less abrasive particles The invention relates to an abrasive article of the type comprising a number of metal deposits, preferably electrodeposit, on a substrate. Regarding. The metal deposit is made of a granular abrasive material such as a diamond grid. have

European Patent No. 0263785, published on April 13, 1988, describes a diamond In the presence of a mask, a mask is passed over the conductive fabric. electrodeposition to form a deposit containing a large number of abrasive particles on the undercoating fibers ( From this disclosure, a technique for manufacturing an abrasive product is disclosed. This patented abrasive product In the polishing industry, it is particularly effective in stone and glass applications. This lab The polishing product has good bendability and lasts many times longer than normal polishing products.

Canadian Patent No. 530,811.531,996.549゜9011.552,3 87 and 556.049 for carrying out the method of deposition on fibers or other substrates. discloses various techniques for this purpose. In a preferred embodiment, a metal foil is deposited on the substrate. and photo-technically masked. Next, the said in the presence of Diamond Sword 1 Lusotho Through the apertures in the mask, the disokel is deposited onto a metal foil, preferably a copper foil, and the diamond Embed Sendog 1 Rusod in 2 Sokel deposits. After electrodeposition, remove the mask The copper in the deposit is etched in an acid bath and the resulting gaps are filled with a resin, preferably a filler. Filled with resin containing silicon carbide.

These abrasive products are generally highly effective.

According to the present invention, the substrate includes a large number of metal deposits, and the metal deposits are granular. an abrasive product having an abrasive material, the deposit being deposited relative to the total surface area of the substrate; An abrasive product having a coverage of less than about 25% is provided.

The coverage can be less than about 20%, preferably about 12-18%. on the board The pattern of deposits can be changed.

Arrangement of deposits in triangular groups of three, diamond-shaped groups of four, or diagonal arrays was found to be particularly desirable.

The present invention provides for substantial reduction in substrate coverage below normal practice expected by those skilled in the art. A significant reduction may lead to an improvement in polishing performance, or such a reduction may result in a gradual deterioration of performance. It is based on the significant and totally unexpected result that it does not yield. polishing Since the material, generally diamond grid, is a very expensive component, the latter result It is for use. The ability to reduce the amount of diamond used translates into cost savings. Garu. Overall, diamond coverage can be reduced without compromising performance. That is something unexpected.

A gradual decrease in abrasive concentration will result in a concomitant decrease in polishing performance. child It is not entirely clear why this does not occur, but at normal concentrations The protruding abrasive particles on the surface of the abrasive product are worn away, and the frictional force between the sample and the abrasive product is It is thought that the abrasive grains are spread over, resulting in rounded tips. Ken When the number of abrasive particles decreases, the frictional force caused by the particles is small, and the particles are broken into small pieces. This creates jagged edges that foster good polishing properties.

Figure 1 is a cross-sectional view of an abrasive product with normal surface coverage and Figure 2 is a cross-sectional view of an abrasive product with reduced surface coverage. Figure 3 is a cross-sectional view showing abrasive products with a normal surface coverage and a reduced surface coverage. Surface coverage of the belt and the material removal rate relative to the number of samples polished by the belt. The measured results are shown in Figure 4 for abrasive products with normal and reduced surface coverage. Figures 5a to 5e show the results of measuring the material removal rate versus time; Figure 6 shows the various stacking patterns of fallen plates in the stack; glass versus time for abrasives with surface coverage and surface pattern of A graph showing the removal rate, FIG. FIG. 8 shows an abrasive disc consisting of several segments, and FIG. For an abrasive with a normal distribution and an abrasive with a particle distribution reduced to 1/3. 3 is a graph showing the amount of substrate removed versus time.

The abrasive product shown in FIG. 1 includes a Kevlar 7M woven substrate 1. nickel electric The deposit 4 is formed on the copper foil disk 2 resin-bonded to the Kevlar TM substrate 1. be done. The nickel deposit 4 has diamond grid grains buried therein. Has 5 children. The deposit 5 is typically circular, about 1/16 inch in diameter, but Other shapes as described in the above patent specifications, and up to about 1/4 inch may have a diameter of

The spaces between the deposits 4 are filled with polyurethane resin containing silicon carbide as a filler. Filled with fat 3. This reduces shear forces on the deposit and during the polishing process to help keep them on track.

The structure of the second product is described in the above patent specification.

First, copper foil is woven with Kevlar TM using Lomod TM resin. It is bonded to the substrate. Then the surface mask is applied phototechnically, the diamond Electrodeposit nickel through a mask onto the copper foil in the presence of lid particles. Finally, Ma Remove the foil with sodium hydroxide solution and etch the remaining foil between the electrodeposit with acid. Remove the ringing. The space is then lined with resin.

The above patent specification describes a diamond deposited on some form of substrate by nickel electrodeposition. An improved technique for the production of products having Doggrid particles is described. diamond Other techniques for producing abrasive articles having nickel deposits are known.

For example, U.S. Patent No. 4,256,467 describes Discloses a technique for forming electrodeposited deposits by. U.S. Patent No. 4,047 , 902 discloses a technique for forming electrodeposited deposits on a substrate. The above patent These products manufactured according to the technology described in the specification and the actual products The traditional practice is to have a relatively high percentage coverage of the total area of the abrasive product. It was considered normal and necessary. In fact, the surface coverage is , at least about 1/3. The commercially available product herein has approximately 32.2% It has a coverage rate. Experience with other types of conventional abrasives has shown that this inherent surface coating He suggested that a reversal would be necessary. Additionally, surface coverage beyond this level It was not actually thought of to reduce the This is commercially available for polishing This is because the amount available is limited and the expected results are poor.

Quite suddenly, on the contrary, in some cases the decrease in surface coverage Improved polishing performance and no reduction in polishing performance over a wide range or Even if it is, it will be less.

It is not entirely clear why this occurs, but relatively high diamond concentrations It is believed that it depends on the degree. This is due to the frictional load caused by the large number of diamonds The frictional force spreads over the particles and causes the particles 5 to wear out, as shown in Figure 1. This is because the particles become round.

Figure 2 shows a product similar to that of Figure 1, but with reduced coverage of nickel deposits. Indicates an abrasive product with As shown in FIG. 2, the deposit 5 has jagged edges. shown as having. What happens at reduced diamond concentrations is Instead of the diamond particles being worn away, the frictional force causes microscopic fractures, creating jagged edges. It is thought to bring about the Edge of Giza. These abrasive products also have rounded ends. They tend to give better results and improve polishing performance.

In initial experiments, abrasive products made by the technology described in the above-mentioned application were Used to remove material from glass samples. This belt is a moving belt With respect to the direction, the pellets are arranged in a regular diagonal pattern, and the deposit is about 1 It has a diameter of 716 inches and a surface coverage of approximately 32.2%. first experiment smell One out of every three deposits is removed with a knife, and this belt grinds a series of samples. It was used for polishing.

The results shown in Figure 3 show that the number of samples polished by the belt is Removal rate (MRR) force (pro soted).

Roses indicate standard belts, squares indicate belts with reduced surface coverage. vinegar. The performance of belts with reduced surface coverage is better than that of belts with standard surface coverage. Belt C, which is substantially one better than the belt C and has a reduced surface coverage. The sample can be polished well.

FIG. 4 shows similar results where MRR is plotted against time.

Belt with reduced surface coverage, i.e. approximately 173 less zero coverage than a regular belt. The belt with coverage is substantially better than the MRR of conventional belts.

Figure 5a shows the deposition for a conventional belt with total coverage, i.e. 32.2% coverage. Shows the product pattern. Figures 5b-5e Ct of belts with reduced surface coverage (other deposits in the case) show a turn. The surface coverage is as follows.

Experiments were carried out on a belt with stacked turns as shown in Figures 5a to 5e. . A glass plate 1/4 inch thick, 1 + 1/8 (1,125) inch wide, 2 1 inch long Kevlar TM bell with grid size 220 Polished under normal conditions.

The results are shown in FIG. Figure 6 shows the glass removal rate (27 minutes) versus time. Lots are available. In Figure 6, the square marks are obtained using the regular belt shown in Figure 5. The cross indicates the result obtained using the triangular array shown in Figure 5b, and the die Yamond marks indicate results obtained using the diagonal array shown in Figure 5C, and triangle marks indicate results obtained using the diagonal array shown in Figure 5C. The results obtained using the diamond array shown in the figure are shown; The results obtained using the pattern are shown.

The results shown in Figure 6 are very interesting. Using the pattern shown in Figure 4, i.e. the surface The best results are obtained with a coverage of 17.04%. This is the surface coating used previously. half of the rate.

Worst results are obtained using higher diamond concentrations, as shown by the squares. . Using the triangular array of Figure 5b, i.e. for a surface coverage of 15.2%, the Much better results are obtained than with arrays. Darkness of diamond grid The fact that the glass removal rate is tripled after 30 minutes is extremely significant. It is a fruit. The ability to reduce the diamond coating by a factor of 2 reduces the cost of the product. Substantially reduced.

FIG. 7 shows an abrasive disc having the advantages of this result.

The disc includes uniformly spaced shaped segments on a substrate and There are no deposits between the segments.

The surface coverage within the segment can be reduced as described above and is uniform over the entire surface. leading to less total surface coverage than would be the case with a belt with a uniform pattern. Sediment sa The size is approximately 1/4 inch.

Figure 8 shows the results of another experiment, using a reduced diamond particle concentration. Checking the benefits.

As described above, the present invention has been described using diamonds deposited on a copper substrate and embedded in a second sokel. Although the case of particles has been described, it is also possible to use other suitable materials. da Diamond particles it, depending on the application, cubic boron nitride or other suitable materials as mentioned above , and may be substituted with compatible materials other than copper and nickel. The point falls to about 25% of the total area or a given area. Reduced concentration by 50% If you use it, you will get better results than regular products.

O, place, pot n) international search report international search report GB 8900728

Claims (17)

[Claims] (1) Contains a large number of metal deposits on a substrate, and the metal deposits have granular abrasive material. in an abrasive product in which the coverage of the metal deposit over the total surface area of the substrate is about An abrasive product characterized in that it is less than 25%. (2) The polishing according to claim 1, wherein the coverage is less than about 20%. Polished products. (3) A claim characterized in that the coverage is in a range of about 12 to about 18%. The abrasive product according to item 1. (4) The metal deposit is arranged in a regular pattern. The abrasive product according to item 3. (5) Claim 4, wherein the metal deposits are arranged in a diagonal pattern. Abrasive products listed in . (6) The polishing product according to claim 4, wherein the coverage rate is about 13%. Goods. (7) The metal deposits are arranged in groups in a regular pattern. An abrasive product according to claim 4. (8) Each group of regular patterns includes three triangular deposits. 7. The abrasive product of claim 6. (9) The polishing product according to claim 8, wherein the coverage is about 15%. Goods. (10) Each group of regular patterns includes four deposits in a rectangular arrangement. An abrasive product according to claim 8. (11) The polishing according to claim 10, wherein the coverage rate is about 17%. Polished products. (12) The coverage ratio is in a range of about 15% to about 18%. The abrasive product according to claim 1. (13) The granular abrasive material is diamond grit. The abrasive product according to claim 1. (14) Electrodeposit metal on the substrate through a mask, and add granular abrasive material into the metal. Polishing comprising a step of embedding and a step of forming a pattern of electrodeposit on the substrate In the method for manufacturing a product, the coverage of the deposit on the total surface area of the substrate is about A method for producing an abrasive product, characterized in that the abrasive product is less than 25%. (15) The coverage rate is less than about 20% according to claim 13. Method of manufacturing abrasive products. (16) The coverage ratio is in a range of about 12% to about 18%. A method for producing an abrasive product according to claim 13. (17) The granular abrasive material is diamond grit. 15. A method for producing an abrasive product according to claim 14.