JPH05208371A - Manufacture of grinding tool - Google Patents

Abstract

PURPOSE:To reform so that it may perform highly accurate working at high speed by elevating the tenacity of abrasive grains, and increasing service life, and improving the elimination of chips. CONSTITUTION:Abrasive grains 2 are fixed, ranging from inside of porous holes to the surface, to a tube 1 being made in multilayer and porous by weaving, braiding, and unweaving out of fibers of carbon, glass, ceramic, thermosetting resin, metal, or the like. The fixing is performed by electric plating, electroless plating, vappor-phase plating of PVD or CVD, or fusion by a laser. The grinding member consisting of the tube 1, where this abrasive grains 2 are fixed, is fixed to the shank 3, and in the shank 3, a coolant supply hole, at the center shaft, and an opening 3b, at the engaging part of the tube 1, are made, thus coolant can be jetted out of the hole 1a of the porous tube.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method of manufacturing a grinding tool.

[0002]

2. Description of the Related Art As a conventional grinding tool, various bond grindstones such as metal bond, resin bond, and vitrified bond in which abrasive grains are bonded to the surface of a base material are known. In these whetstones, the abrasive grains are bonded by various bonding materials, but all of them have the drawback that the bond holding force of the abrasive grains is not sufficient and the dropout consumption during processing is large.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a method for manufacturing a grinding tool capable of increasing the holding force of the abrasive grains, increasing the service life of the abrasive grains, improving the shape accuracy, and performing high-precision machining at high speed. With the goal.

[0004]

[Means for Solving the Problems] A woven, knitted, or non-woven single-layer or multi-layer porous body of fibers is formed into a tube shape having a required shape, and the porous body is subjected to liquid phase plating or vapor deposition of abrasive grains. A porous body tube fixed by phase plating and fixed with the abrasive grains is fitted and fixedly supported on a shank having a cooling liquid supply hole formed therein in order to eject the cooling liquid from the porous hole of the tube. And

[0005]

According to the present invention, as described above, a woven, knitted, or non-woven single-layer or multi-layer porous body having abrasive grains fixed thereto is fixedly supported on a shank. The holding of the abrasive grains is held extremely firmly by the porous holes, the falling of the abrasive grains is prevented, and the grinding process with stable wear resistance can be performed. Moreover, the holes of the porous body also serve as chip pockets for chips, which improves grindability and enables efficient, high-speed and high-precision machining. Further, since the shank having the cooling liquid supply hole for ejecting the cooling liquid from the porous body is used, it is possible to perform the grinding process while ejecting the supplied cooling liquid from the porous body. The excellent removal of cutting chips as well as cooling has the effect of enabling stable processing at high speed. In addition, since the porous body is formed into a tube shape, and is inserted into the shank to be fixedly supported, it is easy to manufacture, and the liquid supplied from the cooling liquid supply hole provided on the shank fits into the porous body. The cooling liquid can be jetted entirely from the holes of the body tube, and a grinding tool having good workability can be easily obtained.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment of the drawings. FIG. 1 shows an embodiment in which the grinding member is formed in a tubular shape.
Reference numeral 1 denotes a tube in which fibers having a diameter of about 1 to 10 μφ such as carbon, glass, ceramics, thermosetting resin, and metal are woven, knitted, or non-woven to form a multi-layered porous film. (B) is a front sectional view. Reference numeral _{2 is} an abrasive grain that is fixedly interposed between the inside of the porous hole of the tube 1 and the surface, and is Dia, CBN, TiC, TiB ₂ , TiBC, S.
iC, Al ₂ O ₃ , and other abrasive grains having a size of about _{3 to} 10 μφ, alone or as a mixture, are used. To fix the abrasive grains 2, liquid phase plating such as electroplating or electroless plating or vapor phase plating is used. Vacuum deposition for vapor plating,
PVD such as sputter deposition, ion plating, and CVD are chemical methods. Alternatively, laser welding may be used. The concentration of the fixed abrasive grains is set to about 10 to 50 Vol% so that the porous holes of the tube 1 are not filled up.

Reference numeral 3 denotes a shank for fixedly supporting a grinding member composed of a tube 1 to which abrasive grains 2 are fixed, and the tube 1 is fitted and fixed to the tip. For fixing, adhesive fixing, crimping, tightening band tightening, screwing, or other mechanical fixing is adopted. A supply hole 3a for cooling liquid, air, etc. is formed in the central axis of the shank 3, and a cross-shaped opening 3b is formed in the fitting portion of the tube 1 at the tip, from which the supply liquid is porous in the tube. It is designed to be ejected into the grinding gap through the hole 1a.

The grinding member composed of the porous tube 1 and the abrasive grains 2 performs the grinding process by fixing the shank 3 to the rotating shaft of the dental turbine and rotating at a high speed. It acts as a chip pocket for chips, and the cooling liquid can be jetted and supplied through the holes of this porous body. It has a high grindability due to chip removal, cooling, lubrication, etc., and a stable high speed. It is possible to perform high-precision machining.

Further, since the abrasive grains 2 adhered to the porous body 1 are held in the porous holes and have a high holding force, they do not easily come off due to the grinding process, have a stable and extremely long grinding life. Is obtained.

For example, a carbon fiber having a wire diameter of 5 μφ is woven into a three-layer porous tube having an outer diameter of 1.6 mmφ and an inner diameter of 0.4 mmφ, and sodium succinate, DL-
An electroless nickel plating solution using malic acid as a complexing agent and sodium hypophosphite as a reducing agent was mixed with 40% of 300 mesh diamond and 5% of 100 mesh SiC to perform electroless composite plating at 360 ° C. Heat treatment was performed to form a grinding member. This was fixed to a 0.4 mmφ shank having a jet hole formed in a stainless steel central axis and used for grinding. In the grinding process, the grinding feed was 200 mm / min, the peripheral speed was 15 m / min, and the grinding ratio was calculated by processing Si ₃ N ₄ and found to be about 6 × 10 ³ at a working depth of 20 mm. It can be seen that this is extremely large in comparison with the conventional Ni electrodeposition tool having a grinding ratio of 3 × 10 ² .

FIG. 2 is an enlarged detailed view of another embodiment of the bonded portion of the porous tube and the abrasive grains, and FIG. 2A is a plating layer for mixing the abrasive grains 21 into the single-layer or multi-layer tube 11 in which the fibers are inclined and woven. 22 are formed in a scattered manner, and the supply cooling liquid is jetted from a large number of holes 11a of the tube 11 in the portion where the abrasive grains are not bonded to perform processing. (B) The figure shows a tube 12 in which fibers are woven vertically and horizontally.
The plating layer 22 mixed with the abrasive grains 21 is scatteredly formed, and the cooling liquid is ejected from the holes 12a of the porous tube 12.

FIG. 3 shows another embodiment, in which an abrasive grain layer is fixed in a dispersive and uneven shape as shown by 23 in the figure on a tube 11 formed into a multi-layered porous structure by weaving, knitting and non-woven of fibers. It is a thing. The height of the unevenness of the abrasive grain layer is about 0.05 mm to 3 mm
Form to a degree. Concentration is usually 50 ~
It can be arbitrarily fixed within a range of about 150. During processing, the cooling liquid supplied through the supply hole 31a of the shank 31 is jetted from the hole 11a of the porous tube 11 and also from the tip of the shank supply hole 3a to enhance the cooling effect, and the temperature rise is 100 ° or less. Usually, it can be ground at about 60 ° C. Grinding life is 1 compared to the conventional one
It is 0 times or more.

In FIG. 4, the fitting support portion of the tip porous tube 11 of the shank 31 is formed into a star shape 31b as shown in the sectional view of FIG. 31
This is an embodiment in which a is communicated with this star-shaped groove so that the liquid is ejected over the whole area.

FIG. 5 shows an example in which the tip is sharpened. A porous tube is formed in a conical shape 13, and this is fitted and fixed to the tip of a shank 32 formed in a similar conical shape. The abrasive grains are adhered to the side surface 24 of the conical shape 13 by normal concentration and to the conical tip 25 with high density.

In FIG. 6, a shank 33 having an uneven surface is provided at the grinding tip, and the porous tube 14 having abrasive grains fixed thereto is inserted into the uneven portion, and compressed from the outside so as to be fastened and fixed to the uneven portion. It was done. According to this, shank 3
3 and the porous tube 14 have high bonding strength, and stable processing can be performed without separation during processing. Incidentally, the grinding member composed of the porous tube and the fixed abrasive grains can be formed into any shape other than the above embodiment.

[0016]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, weaving, knitting of fibers,
Alternatively, since the grinding member is made by fixing and supporting the abrasive particles to the non-woven single-layer or multi-layer porous body on the shank, the abrasive particles are held very firmly by the porous holes, It is possible to prevent the falling off and to perform grinding with stable wear resistance. Moreover, the holes of the porous body also serve as chip pockets for chips, which improves grindability and enables efficient, high-speed and high-precision machining. Further, since the cooling liquid is ejected from the porous body as the shank, by using the shank having the cooling liquid supply hole, it is possible to perform the grinding process while ejecting the supplied cooling liquid from the porous body, and to cool the grinding portion. At the same time, the removal of cutting chips is favorably carried out, so that stable machining can be performed at high speed. Further, in manufacturing the grinding tool, the porous body is formed into a tube shape, and the porous body is fitted into the shank to be fixedly supported, so that it can be firmly supported and fixed, and the manufacture is easy. It is possible to easily obtain a grinding tool having good workability, in which the cooling liquid supplied from the liquid supply hole provided in the above can be jetted entirely from the hole of the porous tube to be fitted to the processed portion.

[Brief description of drawings]

FIG. 1 is a structural diagram of an embodiment of the present invention.

FIG. 2 is a partially enlarged view of another embodiment of the present invention.

FIG. 3 is a structural diagram of another embodiment of the present invention.

FIG. 4 is a structural diagram of another embodiment of the present invention.

FIG. 5 is a structural diagram of another embodiment of the present invention.

FIG. 6 is a structural diagram of another embodiment of the present invention.

[Explanation of symbols]

 1 Porous Tube 1a Hole 2 Abrasive Grain 3 Shank 3a Coolant Supply Hole 3b Opening

Claims (2)

[Claims] 1. A woven, knitted, or non-woven single-layer or multi-layered porous body of fibers is formed into a tubular shape having a desired shape, and abrasive grains are fixed to the porous body by liquid phase plating or vapor phase plating. Then, the porous body tube to which the abrasive grains are fixed is
A method of manufacturing a grinding tool, characterized in that the cooling tool is fitted, fixed and supported on a shank having a cooling liquid supply hole for ejecting the cooling liquid from a porous hole of the tube. 2. The method for manufacturing a grinding tool according to claim 1, wherein abrasive particles are laser-welded to the porous body.