JPS5828468A - Method of coating and forming abrasive material small piece to brush tool as metal tool and brush tool as metal tool manufactured through said method - 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

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for coating a brush tool as a metal tool with small pieces of abrasive material such as diamond, boron nitride particles, and corundum, and a brush tool as a metal tool manufactured by this method. It is related to.

A sintered grinder made of small pieces of abrasive material and a binder is known as a brush tool for deburring and polishing objects to be polished. This sintered glider/grider is attached to a holder device for attaching the metal, and is also used for deburring and polishing the periphery of the hole and the curved surface formed by the drilling operation.

By the way, a brush tool is much more advantageous for removing burrs from the periphery of the hole and the curved surface. This is because it is more efficient to remove spots on sensitive areas using a brush tool such as a handheld brush. In that case, it is preferable to use a brush tool coated with small pieces of abrasive material, and the brush tool is made of plastic and has a spherical cap on the tip of the brush according to DE-PS2518244.
It is already disclosed in the issue.

This spherical cap is made by hardening small pieces of abrasive material with a binding material, and during IWJ, this binding material has the function of fixing the spherical cap made of a combination of small pieces of abrasive material to the tip of the brush of the brush tool. ing.

This brush tool is soft and has the effect that the spherical cap made of abrasive pieces rolled up with a binding material is relatively large compared to the tip of the brush, making the tip of each brush unstable. . Moreover, the tip of the brush is easily broken. With this spherical cap, the number of brush tip parts of the brush tool is also limited by the size of the spherical cap, resulting in a relatively small number of brush tips.
It is not possible to use a regular brush; a specially made brush is required.

The object of the present invention is to provide a method for coating the tip of a brush as a metal tool with small abrasive particles, which can be applied simultaneously to a wide surface of a metal tool and to the tip of a brush of a common metal brush tool. The present invention provides a brush tool as a metal tool manufactured by the method.

The feature of this method is that the brush tool, which is a metal tool, is coated with small pieces of abrasive material such as diamond, boron nitride particles, and corundum. The brush tool partially coated in this way is immersed in a plating bath containing abrasive particles to coat a layer of a hard metal carrier such as nickel or chrome with at least a large number of abrasive particles. The coating is provided on the uncovered portion of the brush tool by plating such as electroplating or electroless plating while partially embedding the brush tool, and the coated portion of the brush tool is then removed.

According to the method of the present invention, a metal tool can be coated with small pieces of abrasive material such as diamond, boron nitride powder, corundum, etc., and the small piece of abrasive material is a suitable part of the metal tool, First, the small abrasive pieces are taken into and fixed in the metal composite layer made of hard metal, and a portion of the abrasive particles protrude from the metal composite layer to function as an abrasive. Metal tools coated with abrasive material in this way have a very long service life and are far superior to conventional brush tools. This is because the abrasive pieces are not attached to the brush tool by a bonding material or adhesive, but are embedded in a metal assembly layer formed by plating. In addition, a sufficient number of small pieces of abrasive material protrude from the metal assembly layer, and this protrusion has a sufficient width so as not to interfere with polishing. This is because the area and angle of the ridge are completely blind. Other advantages of the method of the invention are:
It is possible to provide the brush tip of the brush tool with a relatively small cap consisting of a small piece of abrasive material.

When a brush tool as a metal tool is provided with a small piece of abrasive material coated on the tip of the brush, the part of the brush tool with the tip of the brush is coated with a non-conductive material such as lacquer, wax, or plaster. It is preferable to surround the brush completely with the material and then extend the tip of the brush by a suitable length, about 1 to 2 mm. This can be done using an abrasive brush tool. can. It is very simple to coat the tip of the brush to be coated, leaving it intact.

An advantageous method is to use a non-conductive material that hardens within a certain temperature range and becomes viscous under temperature conditions significantly deviating from this. This coating operation can be carried out very simply by dipping the brush tool several times and curing the non-conductive material. Removal of the non-conductive material coating is accomplished by warming the brush tool to an appropriate temperature and dispensing fluidized non-conductive material from the brush tool.

The detailed structure of the present invention will become clear from the following description.

In Figure 1, with an 11#''t deburring brush tool,
In this brush tool 11 for deburring, metal brushes 12 are bundled together in a spiral shape and attached to a tool rotating shaft 15. The tool rotating shaft 1!5fi is constructed by twisting two metal wires together, and its free end 16 can be attached to a suitable drive device.

As shown in FIG. 3, each free end 18 of the metal brush 12 is provided with a cap 19.
The thickness of the metal brush 9 is about 2 to 3 times that of the metal brush 12. The cap 19 has nickel as a metal composite 21, and a portion of diamond/)' particles 22 as small pieces of abrasive material are embedded in the metal composite 21 so as to protrude from the gold Mffi material 21. has been done. Diamond/Do Particle 2
A large number of small abrasive pieces 22 are embedded inside the metal assembly 21, preferably about one-half to about one-fifth of the abrasive pieces 22 protruding from the metal assembly 21. The diamond 22Fi, which is a small abrasive piece completely buried in the metal assembly 21, is exposed when the metal assembly 21 is worn away by the use of the brush tool 11.

The diamond 220 grain size of the abrasive particles may be appropriately selected depending on the purpose of use.

The deburring brush tool 26 shown in FIG. 2 has a different configuration from that shown in FIG. 1, and has an elastic rod 28 attached to its shaft 27. This elastic rod 28
The elastic rods 28 are arranged in a distributed manner so as to surround the shaft 27, and both ends of the elastic rods 28 are attached to sockets 29 and 29'.

This elastic rod 28 is connected from the socket 29 to the socket 2? It extends toward ', and is said to be barrel-shaped with a bulging center. That is, if we consider the distance from this axis 27 in the radial direction of this axis, the distance to each part of the elastic rod 28 extending along this axis will be different no matter which distance wi in the axial direction is measured. It is said that Further, the elastic rod 26 is slightly twisted with respect to the longitudinal direction of the shaft 27.

In the area indicated by the symbol A, the elastic rod 28 is covered with a small abrasive material 2.
Coated with diamond particles as 2'-
However, in this case as well, the diamond particles as the abrasive particles 22' are partially placed on the nickel as the metal assembly 21', and approximately one-half to one-fifth of the diamond particles are on the metal assembly 21'. It protrudes from 21'.

Here, nickel is used as the metal assembly of the two brush tools 11.26, but other hard metals, such as chrome, can also be used, or completely different soft metals, Of course, materials such as copper metal, zinc metal, etc. can be used. Although diamond particles 22, 22' are used here as the abrasive particles, other materials such as corundum, naphire, ruby, etc. may also be used. Of course, in addition to the brush tool 26 shown in FIG. 2, a brush tool having a large polishing area may be provided with a metal assembly, and the metal assembly may be covered with small pieces of abrasive material embedded therein.

The operation of attaching the cap 19 to the brush 12 of the brush tool 11 is performed as follows.

First, at least the portion of the brush tool 11 having the brush 12 is completely coated with a non-conductive material. That is, a non-conductive material is used that has fluidity when heated and hardens within a specific temperature range. An example of such a non-conductive material is wax. Wax hardens below about 40 degrees Celsius and softens above this temperature. When the temperature of the wax approaches 200C, the wax becomes fluid. like this,
The part of the brush tool to be coated is dipped into the flowing non-conductive material, and then removed and rotated to shake off excess non-conductive material.

The non-conductive material adhering to the brush tool then cools and hardens. This series of operations, ie, immersion of the brush tool, removal of the brush tool, and rotation of the brush tool, is repeated until the attachment portion of the brush 12 of the brush tool 11 is completely covered. It goes without saying that lacquer, plaster, etc. can be used as the non-conductive material.

After this work is completed, the brush tool 11 is attached to a rotary stand, etc., and the entire outer periphery of the brush tool 11 is polished with an ordinary polishing brush.
The non-conductive material covering the brush 12t is removed over a length of about 1'lk to 2 mm of the free end of the brush 12t. This point 1 of the brush 12 from which the non-conductive material has been removed
8, the cap 1 is plated with gold.

The tip portion 18 of the brush 12 from which the coating has been removed is immersed in an etching solution to gold-etch the tip portion 1a before forming the cap 19 by gold plating.
Chemically activate and clean B.

In this way, most of the area is covered, and only the tip portion 18 is covered by approximately 1
The exposed metal brush tool 11 over a length of 2 to 2 mm is then immersed in a plating solution. Here, electroplating is used for this plating, but electroless plating can also be used. The metal brush tool 11 immersed in the plating bath serves as one electrode.

A nickel material is used for the other electrode, and the nickel material constituting the other electrode is dissolved in the plating solution when electricity is applied, and the brush tool 11 as one electrode is , nickel as a metal component precipitates and adheres to the tip portion 18 . At this time, at the same time as the nickel 21 is deposited on the tip 18, the diamond particles 22 also adhere to the tip 18 and are embedded in the nickel as the metal assembly.

In the brush tool 11 shown in FIGS. 1 and 3, which shows the brush tool 11 coated with diamond particles 22 as an abrasive, the brush tool 111i is placed on a five-groove support for plating. It is immersed in the bath and completely submerged in the plating solution.

Next, it is applied to the upper surface of the brush 12 of the brush tool 11. Thereafter, the plating solution is activated, and nickel as the metal assembly 21 is deposited on the tip 18 of the brush 12, and at this time, the diamond powder particles are also embedded at the same time. After this work has progressed to a certain extent, the brush tool 11 is rotated to coat the opposite surface of the brush 120 with diamond powder, and then the plating solution is activated again. Then, the diamond particles are embedded in the metal phase material as nickel is precipitated at the tip portion 1B.

In this state, the diamond particles are incompletely attached to the tip 18. This is because the diamond particles are only relatively shallowly embedded in the metal assembly 21. Rounds that embed diamond particles deeper should be plated again. Here, plating is performed in a second plating bath different from the first plating bath, which includes electroplating,
Alternatively, a method using electroless plating can be used.

By performing plating in this second plating bath, the diamond particles on the side closer to the surface of the brush 120 are completely embedded in the metal phase material, but the diamond particles on the side farther from the surface of the brush 120, that is, the outermost diamond particles are completely embedded in the metal phase material. Approximately one-fourth to one-fifth of the diamond particles are metal composites 21
It is buried so that it is exposed. The time required for this work varies depending on the conditions of the plating solution. When this operation is completed, the diamond particles are fixed in the metal assembly 21, and the diamond particles can be used as an abrasive and have a long service life.

The middle yag 19 has a certain size, and there are diamond particles inside the cap 19, and the core diamond particles are exposed during the process of wear of the yag 119 and are used as an abrasive. Because of this,
The consumption of diamond particles as an abrasive is prevented to some extent.

The pointed end 18 of the brush 12 is activated by etching, and then immersed in a special plating solution.
The metal assembly 21 can also be formed in a thin layer. Additionally, complete embedding of diamond particles can be achieved without the use of a special plating bath as described above. When using a relatively inexpensive abrasive material such as diamond, diamond particles as abrasive particles are provided in a pool of plating solution, and the pointed end 18 of the brush tool 11 is used during the electroplating operation. can be left immersed in this pool-like plating solution, in which case there is no need to rotate the brush tool 11 during plating work.

When weaving a cap 19 on each of the pointed ends 151fC of the brush 12, the covering material such as wax as a non-conductive material must be removed again.
The required portions of the wax are heated under suitable environmental conditions to fluidize the wax and thereby remove it.

The engineering JL24KTh%A shown in Figure 2,
The same applies to the operation of covering the small pieces of abrasive material 22' embedded in the assembly. In FIG. 2, As of the brush tool 26
An abrasive material is provided only in the minute. Therefore, the remaining part is covered, for example by wrapping an insulating band around it. Next, perform the same operations as above. That is, the brush tool is etched and, if necessary, nickel plated, and then the metal assembly and abrasive material are provided in a plating bath. After e, the insulating band is removed. In this operation, the shaft 270 portion of the brush tool 26 is also unnecessarily covered, but the covering operation of other portions is also very easily performed.

In this case, if only a necessary portion of the elastic rod 28 of the brush tool 26 is coated with the abrasive material 22', this portion may be individually immersed in the plating solution.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a first embodiment of a deburring brush tool according to the method of the present invention. FIG. 2 is a perspective view of a second embodiment of a deburring brush tool according to the method of the present invention, and is a perspective view of a deburring brush tool equipped with an elastic rod. 3rd wA#i Sectional and elevational views of the brush tool shown in FIG. 1. Figure 4 is an enlarged view of the elastic rod portion of the brush tool shown in Figure s2. 11.26--Brush tool for deburring 11--Brush 21--Metal assembly 22--Diamond particles 1g--Pointed part Patent applicant Kadia Diamant Maschinenkuntperkutuoi 77 Apric Oh, =Tsupgamepher Kunt Kompany (and 1 other person)

Claims (1)

[Scope of Claims] (1) A method in which a brush tool as a metal tool is coated with small pieces of abrasive material such as diamond, boron nitride particles, corundum, etc. Coating 116L on the tool, the brush tool partially coated in this way,
immersing the brush tool in a plating bath containing an abrasive and partially embedding a hard metal finger layer of nickel, chrome, etc. on the uncovered portion of the brush tool, at least partially embedding a plurality of small pieces of the abrasive; A method for providing abrasive particles on a brush tool as a metal tool, characterized in that the abrasive material is provided by plating such as electroplating or electroless plating, and the coated portion of the brush tool is subsequently removed. (2. In the method described in claim 1, before immersing the partially coated brush tool in the plating solution,
It is characterized by immersing it in an etching solution. (3) Claim 1 or #! 3. A method according to claim 2, characterized in that the uncoated portion of the partially coated brush tool is first provided with a base layer of metal assembly in a plating bath. (4) In the method described in claim 1, two-fifths to five-quarters of the total size of the small abrasive pieces are embedded in the metal assembly. characterized by. (5) In the method according to any one of claims 1 to 4, the embedding of the abrasive particles into the metal assembly is carried out in a plating bath separate from the plating bath for forming the base layer. (6) A method according to claims 1 to 5, in which a small piece of abrasive material is coated on the tip of a brush of a brush tool, and the portion of the brush tool where the brush is attached is coated with a small piece of abrasive material. is provided with at least a non-conductive material, and then
A device designed to remove non-conductive material attached to the tip of the brush that is to be coated. (7) % In the method according to claim 6, the brush of the brush tool is immersed in a non-conductive material which hardens in a certain temperature range, melts outside this temperature range and preferably exhibits viscosity. Something that is characterized by (8) In the method according to claim 6 or 7, the brush of the brush tool is immersed in a heated non-conductive material, and the brush is completely taken out and the brush is removed from the heated non-conductive material. is cured by rotating the brush tool, and this operation is repeated until the brush of the brush tool is completely covered. (9) The method according to any one of claims 6 to 8, characterized in that the non-conductive material is lacquer or wax. 00 Claim 8g In the method according to items 1 to 9, the abrasive is diamond powder, and the particle size of the abrasive is appropriately selected depending on the purpose of use. In the method according to claims 6 to 10, a brush tool is placed on a groove-shaped support and immersed in a plating solution to form a diamond powder into a paste. applied to the tool surface evenly. @ In the method described in claim 11, the diamond powder is applied to the surface of the brush tool in at least two stages, and after the diamond powder is spread and the metal assembly is plated, the brush tool is applied to the surface of the brush tool in at least two stages. Rotating the t-characteristic. (To) A brush tool as a companion metal tool manufactured by the method according to any one of claims 1 to 12, wherein at least the outer surface of the brush tool is preferably hard. A brush tool in which an abrasive material is partially embedded in a metal assembly by plating. 04% In the brush tool according to claim 15, a hard metal layer of nickel, chrome, etc. is provided as a metal assembly on the tip of the metal brush, and the metal carrier is partially polished. Material particles are embedded and the cap is formed by plating.