JPH0588867U - Super abrasive wheel - Google Patents

Abstract

(57) [Summary] [Purpose] To secure the strength of the base metal and also reduce the weight of the wheel, enabling high-precision grinding even for machines with low spindle rigidity. [Structure] In a superabrasive grain wheel having a base metal provided with a superabrasive grain layer, the base metal 2 is made of aluminum, and a sprayed layer 4 of metal powder is formed on the surface of the base metal 2. The thickness of this sprayed layer is 0.1 mm
˜2.0 mm, and metal powder containing stainless steel as a main component can be used as the thermal spray material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to various types of superabrasive wheels such as a straight type or a cup type used for grinding various materials such as glass.

[0002]

[Prior Art]

 Conventionally, an iron base metal having high strength and hardness has been mainly used as a base metal for a super-abrasive metal bond wheel, and diamond, cBN (cubic crystal boron nitride), etc. are used around the base metal. The superabrasive layer is baked and adhered.

The reason why the iron base metal is used is that it has excellent heat resistance, good adhesiveness to metal bond (seizure property), low cost, sufficient base metal strength, Machinability) is good.

[0004]

[Problems to be solved by the device]

 Since a super-abrasive grain wheel using such an iron base metal is heavy, if it is used for a grinding machine with low spindle rigidity, good rotation accuracy cannot be obtained, and high-precision grinding processing is difficult. .. In addition, a heavy load is applied to the machine spindle, which increases power consumption and accelerates the wear of the spindle itself. Furthermore, even when used in a machine with a high spindle rigidity, the weight of the base metal itself causes vibration during the grinding process, which may lead to lower machining accuracy and increased wheel wear.

For this reason, in order to reduce the weight of the base metal, a superabrasive wheel using a base metal of resin or aluminum has been developed and used. However, such a base metal reduces the weight, but the strength is high. Is not sufficient and the heat resistance is poor.

Regarding heat resistance, a bonding method that does not require the heat resistance of the base metal (bonding the superabrasive layer and the base metal) without using a method of baking the superabrasive grain layer on the base metal, a so-called baking method. It doesn't matter if you take However, the strength of the base metal is not sufficient as compared with the iron base metal, and the mounting hole is easily damaged, especially when it is mounted on the machine, or the wheel hole is repeatedly attached and detached from the machine. However, there is a problem that it is easily deformed and worn. Then, the mounting hole and the wheel hole are deformed and worn, and the outer peripheral runout of the superabrasive wheel increases, which causes vibration during the grinding process, which lowers the working accuracy and increases the wheel wear.

In order to eliminate such problems and strengthen the surface of the base metal, it may be possible to perform surface plating of nickel, chrome, etc. on the aluminum alloy, but in the case of plating, the film thickness Is generally several μm to several tens of μm, and it is difficult to achieve sufficient reinforcement. Further, when the plating layer is thickened, the processing time becomes long and the thickness dimension becomes unstable, so that it is impossible to maintain high dimensional accuracy as a wheel.

The present invention solves such a problem by reducing the weight of the wheel while ensuring the strength of the base metal, and highly accurate grinding even if the machine has a small spindle rigidity. The purpose is to obtain a superabrasive wheel that enables processing.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is a superabrasive grain wheel in which a superabrasive grain layer is provided on a base metal, wherein the base metal is made of an aluminum alloy, and a sprayed layer of metal powder is formed on the surface of the base metal. It is characterized by

Here, the thickness of the sprayed layer is appropriately in the range of 0.1 mm to 2.0 mm in order to secure the strength of the base metal and not to increase the weight of the foil, and as the sprayed material, It is possible to use a material mainly composed of stainless steel such as 18-8 stainless steel or high-chromium stainless steel, which has excellent rust prevention.

[0011]

[Operation] In the superabrasive wheel of the present invention, the base metal material is made of aluminum alloy, and the metal sprayed layer is formed on the surface of the base metal. Therefore, the weight of the superabrasive wheel can be reduced and the base metal can be strengthened. Achieved at the same time.

[0012]

【Example】

 FIG. 1 is a plan view of the superabrasive wheel of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG.

Reference numeral 1 denotes a super-abrasive grain metal bond wheel of this embodiment, in which a metal-bond super-abrasive grain layer 3 is provided on the outer periphery of an aluminum alloy base metal 2. The base metal 2 is made of an aluminum alloy having an outer diameter of 150 mm and a thickness of 10 mm, and a uniform sprayed layer 4 having a thickness of 0.2 mm is formed on both surfaces of the base metal 2.

The thermal spray layer 4 is made of a metal powder mainly composed of 18-8 stainless steel, which is excellent in wear resistance and rust prevention, as a thermal spray material. It was formed by a low temperature spraying method with less adverse effect.

Further, 5 is a machine mounting hole, and 6 is a wheel hole. In this embodiment, the wheel hole 6 is deformed when the wheel is attached or detached, or the mounting hole 5 is damaged when the wheel is mounted on the machine. In order to prevent this, the sprayed layer 4 is also formed on all the inner peripheral portions of the wheel hole 6 and the mounting hole 5.

Using the super-abrasive metal bond wheel 1 having the sprayed layer 4 formed thereon, a grinding experiment was performed under the following conditions to measure the accuracy of grinding. As a comparative example, a conventional iron wheel was used.

[Test Conditions] Machine used: 2 horsepower Wheel peripheral speed: V = 2800 mm / min Wheel size: 150 mm D × 15 mm T × 75 mm H × 3 mmX (where D is the outer diameter of the wheel, T is the wheel thickness, and H is Eel hole diameter, X is an abrasive grain layer size.) Work material: Glass for automobile Work material: Overall length 2.5m Thickness 3.5mm Removal amount: 0.2mm [Result] With the superabrasive metal bond wheel, the amount of chipping on the surface of the grinding part was within 0.04 mm, whereas with the conventional superabrasive grain wheel of iron base metal, the amount of chipping was 0.08 mm, which is clear in the present invention product. An advantage was seen.

The present invention is not limited to the superabrasive wheel of the above-mentioned embodiment, but can be applied to, for example, a straight type wheel shown in FIG. 3 (a) or a cup type wheel shown in FIG. 3 (b). Of course.

[0019]

[Effect of the device]

 As described above, in the superabrasive wheel of the present invention, the base metal is made of aluminum alloy, and the sprayed layer of metal powder is formed on the surface of the base metal. For this reason, it is possible to reduce the weight of the wheel while ensuring the strength of the base metal, and it has become possible to perform highly accurate grinding with a small amount of chipping even with a machine with a low spindle rigidity.

Further, since the main component of the thermal spraying material is stainless steel such as 18-8 stainless steel or high-chromium stainless steel, it has excellent rust-preventing power and significantly extends the product life. You can

Further, as compared with the plating method, the wheel was excellent in strength while maintaining sufficient dimensional accuracy of the wheel.

[Brief description of drawings]

FIG. 1 is a plan view of a superabrasive wheel of the present invention.

2 is a cross-sectional view of the superabrasive wheel of the present invention taken along the line AA of FIG.

FIG. 3 is a sectional view of a superabrasive wheel according to another embodiment.

[Explanation of symbols]

 1 Super Abrasive Metal Bond Wheel 2 Base Metal 3 Abrasive Layer 4 Thermal Spray Layer 5 Mounting Hole 6 Wheel Hole

Claims (3)

[Scope of utility model registration request] 1. A superabrasive grain wheel in which a base metal is provided with a superabrasive grain layer, wherein the base metal is made of an aluminum alloy, and a sprayed layer of metal powder is formed on the surface of the base metal. Abrasive wheel. 2. The thickness of the sprayed layer is 0.1 mm to 2.0 mm.
The superabrasive wheel according to claim 1, wherein 3. The superabrasive wheel according to claim 1, wherein a metal powder mainly composed of stainless steel is used as the thermal spray material.