DE3131641A1 - METHOD FOR PUTTING METAL TOOLS, IN PARTICULAR BRUSH TOOLS WITH ABRASIVE PARTICLES, AND METAL TOOL PRODUCED THEREFOR, IN PARTICULAR BRUSH TOOL - Google Patents

Abstract

1. Method for studding the free ends of the bristles of metallic brush tools with particles of grinding material, with which the tool is provided with a covering whilst these portions which shall studded with the grinding material particles, are left free, and subsequently the partially covered tool is dipped into a galavanic bath, into which the grinding material particles have been introduced, and further subsequently a layer of preferably hard metallic carrier material is deposited, whilst at least a plurality of grinding material particles is partially embedded onto said portions of tool, which had been left free, by electrolytic or currentless galvanic metal deposition, and in which further subsequently the cover from the corresponding portion of the tool is moved, wherein at least the bristle carrying brush tool portion is filled with non-conducting material by dipping it into a non-conducting material, which solidifies within a certain ambient temperature range and which at a higher temperature is liquid, preferably viscous, and that thereafter the cover is again removed from said ends of the bristles, which shall be studded with grinding material particles.

Description

description

The present invention relates to a method for filling metal tools, in particular brush tools with abrasive particles, e.g. made of diamond, cubic boron nitride, corundum and the like., And a metallic produced by this method Tools, in particular brush tools.

In the case of tools for deburring and those for honing, it is known to use corresponding grindstones to be used in the form of sintered bodies made of abrasive particles and a binder. These Sintered whetstones can be attached to any shaped holder and used for deburring or honing any bores and the like. Can be used.

It has been found that, in particular for the deburring of bore edges at the ends of bores, are within bore in estuaries and the like. Brushing tools of advantage, in particular when they are filled with abrasive particles. From DE-PS 25 18 246 a brush tool is known in which the bristles are made of plastic and are provided at their ends with a spherical cap. This spherical cap consists of abrasive particles that are bound in a binder, which binder also serves to hold the spherical cap firmly at the bristle end.

The disadvantage here is that this brush tool is relatively soft and that with the spherical cap provided with the abrasive particles is relatively large and thus also 0 for instability or easy kinkability of the individual bristles or the brush contributes overall. Since the ball caps are relatively large, the number of bristles is greatest Brush part of the tool is relatively small. No conventional brushes can therefore be used find, but there must be custom-made products.

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The object of the present invention is to provide a method for filling metallic To create tools with abrasive particles, dac both for covering large surfaces on metallic tools as well as for filling the bristle ends with the usual metallic ones Brush tools can be used equally. In addition, a manufactured according to this method metallic tool, in particular ßürstenwerkzeug be created.

In the case of a method of the type mentioned, this task is carried out by the characterizing feature of the claim 1 and in the case of a tool of the type mentioned by those in the code of claim 13 specified features solved.

With the method according to the invention it is possible to produce metallic tools with abrasive-0 Particles, such as. From diamond, cubic boron nitride, corundum or the like. To be occupied in such a way that they in a hard metal of a carrier material in the relevant areas of the metallic tool are held, wherein they are so partially embedded in the carrier-5 material that

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some of them protrude from the carrier material and can thus serve as an abrasive. Such with abrasive studded metallic tools have a very long service life, substantially above those of the known brush tools is because keeping the abrasive particles does not take place here by connective and other adhesive ₅ but the abrasive particles in a galvanically a - "placed carrier material are included. This also ensures that a sufficient amount and a sufficiently large surface and edges of the abrasive particles protrude from the metallic carrier material.Another advantage of the method according to the invention is that with brush tools, the individual bristle ends with relatively small caps from the embedded in the carrier material Abrasive particles can be provided.

When filling metallic brush tools or their bristle ends, it is useful to that part of the brush tool, which has the brush, completely with a non-conductive one Material, such as a varnish, or

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a wax or plaster of paris to be filled and enveloped, and then in a second Working step to expose the bristle ends in the appropriate length, e.g. about 1 to 2 mm, which can be done, for example, with the help of a grinding brush. This is a very simple one Way of covering the brush of the brush tool so that only the bristle ends that should be occupied, are exposed. 10

Advantageously, the non-conductive material is designed such that it is in a certain ambient temperature range is solidified, while it is in a preferably considerable overlying temperature range is, for example, viscous. This allows the covering in particular simply by dipping in and taking out several times and intermittently Solidification of the material take place. The cover is then removed at the end by that the tool is heated to the relevant temperature, so that the now liquid material can drip out between the bristles or out of the brush.

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Further details and designs of the Ex'findung can be found in the following description, in which the invention is based on the in Embodiments illustrated in the drawing are described and explained in more detail. Show it:

Figure 1 in a schematic perspective representation of a brush deburring tool according to an embodiment of the present invention,

Figure 2 is a schematic perspective view of a deburring tool with resilient rods in accordance with one embodiment of the present invention _s

FIG. 3 shows an enlarged illustration of the free end of two bristles of the brush tool according to FIG. 1 covered with abrasive particles, in section and in view ₃ and FIG

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an enlarged view of a region of one with abrasive particles occupied resilient rod of the tool according to Tigur 2.

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Γη Vig. 1 shows a brush tool 11 for deburring, in which the metallic bristles 12 are attached in bundles and in a helical arrangement to the tool rotation axis 13, which consists of two metal wires twisted together and which at one of their free ends 16 are in a corresponding drive machine can be clamped.

As can be seen from FIG. 3, each free end 18 of a bristle 12 is provided with a cap 19 which is approximately two to three times the thickness of the metallic bristle 12. The cap 19 consists of nickel as the carrier material 21, in which diamond particles 22 as abrasive particles are completely or partially embedded _{5 in} such a way that they protrude from the carrier material 21 by about 1/2 to 1/3 of their size. A multiplicity of abrasive particles 22 is also embedded within the carrier material 21 and only some of the abrasive particles 22 protrude from the carrier material 21. The completely embedded particles 2 2 only emerge and take effect when the cap 19 is worn during the relevant processing. The grain size of the abrasive particles or the

Diamond particles 22 can be selected differently, depending on the area of application and material to be processed.

The tool 26 shown in Fig. 2 is also used for deburring and is around its axis 2 7 provided around with resilient rods 2 8, the are arranged distributed over the circumference and which are each supported at their ends by a sleeve 29. 29 ' are fixed or held. The rods 2 8 run from one sleeve 2.9 to the other sleeve 29 'bulbous, i.e. they constantly change their distance from axis 2 7. They also run in the Twisted somewhat with respect to the longitudinal direction of the axis 2 7.

Within the range indicated by A are the rods 28 with diamond particles as abrasive particles 22 'occupied, which is also partially embedded in this way in nickel as a carrier material 21' here are that they protrude to about 1/2 to 1/3 of their size from the carrier material 21 '.

It is understood that for both tools 11 _s 5 and 2 6, the carrier material, this is nickel, even through a andereo hard metal, such as chromium, or

Can also be replaced by a softer metal such as copper, zinc or the like. In addition, the abrasive particles 22, 22 ', which are diamond particles here, can also be replaced by other abrasives, such as cubic boron nitride, corundum, sapphire, ruby or the like. It is further understood that _s takes the tool 26 of FIG. 2 are also provided with other such large area surface grinding tools with abrasive corresponding embedded in the support material can be filled.

Occupying the metallic bristles 12 of the brush tool 11 with the caps 19 is possible like this:

First of all, the brush tool 11 is completely covered with a non-conductive material, at least with that part which contains the brush or the bristles 12. This covering takes place in that a non-conductive material is used which is liquid, for example viscous, when warm and solidifies in a certain ambient temperature range. Eg., The material in question, a wax, at about 40 ⁰ C

solidifies as it is a liquid at above this temperature, for example. about 200 ⁰ C to doughy masa. In this heated or heated liquid material is the relevant

.5 brush tool part completely immersed, then pulled out and rotated, removing the adhering non-conductive material solidifies. This process j i.e. immersing, pulling out and turning, is repeated until the brush il or the part provided with the bristles 12 of the Tool 11 is completely covered by the non-conductive material.

It goes without saying that a corresponding lacquer or plaster of paris can also be used as a non-conductive material Can be found.

The brush is then clamped on a lathe, for example, and with a normal grinding brush ground on the outer circumference, so that the free ends of the bristles 12 are exposed to a length of about 1 to 2 mm. These exposed ends or tips 18 of the bristles 12 are then electroplated with the caps 19.

The exposed ends 18 of the bristles 12 are used in preparation for the electroplating the caps 19 are placed in an etching bath so that the bristle ends 17 are etched and thus chemically cleaned.

The metallic brush tool 11, which is thus largely covered and in which only the above-mentioned bristle ends 18 are exposed for about 1 to 2 mm, is now shown in FIG is immersed in an electroplating bath and thus represents one electrode. The electroplating bath can be electrolytic or operated without current. In the electroplating bath, one carrier material 21, in the exemplary embodiment nickel, is separated from the other Electrode deposited on the exposed ends 18 of the bristles 12 and applied galvanically. At the same time as the galvanic application of nickel 21 to the Bristle ends 18 with the diamond particles 22 too brought the bristle ends 18 and embedded in the carrier material.

In the case of the brush tool 11 according to FIGS. 1 and 3, the one with diamond particles 22 as abrasive particles should be occupied, the brush

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tool 11 placed on a, for example. Trough-shaped carrier in the electroplating bath ₃ in such a way that the brush tool 11 is completely submerged. The diamond powder is then applied as a pulpy substance to the top area of the brush of the tool 11. The electroplating bath is then activated, so that nickel is deposited as a carrier material on the ends 18 of the bristles 12 and in the process embeds the particles of the diamond powder. If this has been done to a certain extent, the brush tool 11 is rotated, whereupon the other opposite area of the brush is coated with the diamond powder and then the electroplating _{bath is activated again 3} so that here too the diamond particles up to a certain extent with the galvanic application of the carrier material at the bristle ends 18 are embedded in the carrier material.

In this state, the diamond particles adhere only imperfectly to the bristle ends 18, since this has so far only been applied with a relatively small layer thickness on the carrier material 21 are in bed. The further embedding of the diamond

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particles takes place in the embodiment in a second electroplating bath, which can also be operated electrolytically or without current. In this bath embedding now be DER diamond particles in such a way that the inner abrasive particles are completely embedded in the carrier material 21, while the outer diamond particles are embedded only so far that they ₅ at most to about 1/4 to 1/3 of their size from the Support material 21 protrude. The time required for this embedding depends on the data of the electroplating bath. At the end of this process, the diamond particles are anchored within the carrier material 21 in such a way that they can be used as abrasives and have a very long service life. A certain amount of wear is absorbed by the fact that the cap 19 has a certain size and further diamond particles are arranged inside the cap, which are then exposed during the previous wear period and come into effect.

It is also possible to convert the exposed ends 18 5 of the bristles 12 in a special manner after the etching Electroplating bath beforehand with carrier material 21

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To be provided in the form of a thin layer, i.e. to be nickel-plated.

Krj is also possible, complete embedding, not in a special electroplating bath as described above, but in the bath where the abrasive particles are also to be found be introduced. If less expensive abrasive particles are used than diamond, so it is also possible to borrow the abrasives to be provided as a sump in the electroplating bath and the relevant end of the brush tool 11 to leave immersed therein during the metallic deposition process, so that twisting of the brush tool 11 is not necessary during this galvanic process »

If the free ends 18 of the bristles 12 are each provided with a cap 19, it must 0 Covering material in the form of the non-conductive wax or other material removed again will. For this purpose, the relevant part of the brush tool 11 is heated to the appropriate temperature heated so that the then liquid wax 5 can drip out of the brush 11 again. There-

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through the non-conductive cover material is removed again in a simple manner.

The tool 26 according to FIG. 2 is filled in a similar manner with abrasive particles 22 'which are embedded in a carrier material. According to FIG. 2, only the area A of the tool 26 is to be covered with abrasive particles. Therefore, the other areas are wrapped with, for example, insulating tape and thus covered. The method is then carried out in the same way as described above, ie the exposed tool areas are etched, if necessary, wound on and then provided with the carrier material and the abrasive particles in the electroplating bath. At the end, the insulating tapes and the like must be removed again. In this process, the exposed area of the tool axis 27 is also unnecessarily occupied, but the process of covering the other areas is very simple here. You want only the areas concerned and the rods 28 of the Wex'küeuges? (> With the Schleifmi tteltcilchen 22 'occupy, so / *!>"I :: L .: it also possible to them individually ir. To dive dun electroplating bath.

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Claims (14)

Claims [1.) Method for populating of metallic tools, and in ^ "^ special brush tools with abrasive particles, such as diamond, cubic boron nitride, corundum and the like, characterized by the following steps:.. Covering the tool whilst leaving free the areas which with the abrasive particles are to be occupied; Immersing the partially covered tool in an electroplating bath in which abrasive particles have been introduced, and applying a layer of preferably hard metallic Carrier material, such as nickel, chromium or the like. With partial embedding of at least a large number of Abrasive particles on the exposed areas of the tool by electrolytic or electroless galvanic Metal deposition; and then removing the cover from the relevant areas of the white stuff. -2- Dresdner Bank Stuttgart 1919854 (BLZ 60060000), Postscheckkonto Stuttgart 507 71-705 (BLZ 600100 7Oi Deutsche Bank Stuttgart 11/03928 (bank code 600 700 70), postal check account Stuttgart 246 46 704 (bank code 600 100 70) 2. The method according to claim 1, characterized in that that the partially covered tool is immersed in an etching bath before being immersed in the galvanic bath. 3. The method according to claim 1 or 2, characterized that the free areas of the partially covered tool in an electroplating bath be provided with a base layer of the carrier material in advance. 4. The method according to claim 1, characterized in that that embedding abrasive particles in the backing material at least about 2/3 to 3A of their size takes place. 5. The method according to any one of the preceding claims, characterized in that the embedding of the Abrasive particles are made into the backing material in a separate electroplating bath. 6. Method of coating the free ends of the bristles of brush tools with abrasive particles, according to one of the preceding claims, characterized in that at least the one with the Part of the brush tool provided with bristles a non-conductive material is filled and then the ends to be coated the bristles are exposed again. 7. The method according to claim 6, characterized in that that the bristles of the brush tool are immersed in a non-conductive material that solidifies in a certain ambient temperature range and at temperature above it is liquid, preferably viscous. 8. The method according to claim 6 or 7 _a, characterized in that the brush of the brush tool is immersed in the heated non-conductive material and pulled out, wherein the material is made to solidify with rotation of the brush tool, and that this process is repeated until the bristles 0 of the brush tool are completely covered. 9. The method according to any one of claims 6 to 8, characterized ₃ that the non-conductive material is a paint or a wax. j> v>: ί 3-13 ' 10. The method according to any one of the preceding claims, characterized gekennzeichrvet ₉ characterized in that the abrasive particles are of diamond powder, wherein the particle size is selected depending on the application. 11. The method according to claims 6 and 10, characterized in that the brush tool is placed on a channel-like carrier in the electroplating bath and the diamond powder is evenly distributed as a pulpy mass over the tool surface. 12. The method according to claim 11, characterized in that - characterized in that the distribution of the diamond powder conclud over the surface of the brush tool in at least two stages, wherein the brush after each stage _s applied in the diamond powder and the carrier material is galvanisch.abgelagert, is rotated. 13. Metallic tool produced by the method according to one of the preceding claims, in particular a brush tool, characterized in that at least the outer surface of the tool (11, 26) with grinding ■ "O ™" Mittelpartike1 (22, 22 ') are occupied, the partially galvanically in a preferably hard metallic carrier material (21, 21 ') are embedded. 5 14. Brush tool according to claim 13, characterized in that the free ends (18) of the metallic bristles (12) are galvanically provided with caps (19) ", which consists of a hard metal as a carrier material (21) _s, for example. Nickel, chromium or the like ., and partially embedded abrasive particles (22), preferably diamond particles. - End of claims -