JPS6020831A - Chucking for porous body - Google Patents

Abstract

PURPOSE:To certainly hold a porous material and permit a various kinds of work high accuracy by heating and liquefying the magnetic fluid in solid state at a room temperature and cooling said material after being filled into the porous material and holding said solid porous material by an electromagnet. CONSTITUTION:A ceramic porous body 1 contains magnetic fluid in solid state, and an electromagnet 2 is installed onto a working base 2b constituted of electromagnet, and the porous body 1 is held by the magnetic force. A slider 4 which is advanced and retreated by a projection part 2a and a screw 3 is installed onto the working base 2, and further a holding part having a variable holding span W is installed, and then the lateral shift of the porous body 1 is prevented, and the more certain holding is permitted. When the magnetic fluid is drawn-out from the porous body after the completion of work, the porous body is heated to liquefy the solid magnetic fluid inside, and a magnetic force is applied. Therefore, even if a brittle material such as ceramics can be held firmly, and the working high accuracy is permitted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for chucking porous bodies, and particularly to a method suitable for chucking porous ceramics.

[Background of the invention]

In recent years, the scope of use of ceramics has been expanding, and many operations have been performed to cut or grind ceramic materials for various purposes.

By the way, in general, in order to perform machining of a component, it is necessary to firmly grasp and fix the component. However, porous bodies, especially porous ceramic bodies, are brittle materials and easily break due to non-uniform stress, so it is difficult to hold them firmly with a gripping tool such as a vise.

Therefore, when processing such porous parts, it is usually done by attaching it to the processing table etc. using adhesive, but after processing (processing table etc.) (removal from 1a, removal of contact 1a agent) is ir+7, fqjJ,
There are also times when parts get dirty. -Also, because porous materials have air permeability, general Shinkyu chucks cannot be used.

Particularly in recent years, deep tin claw cutting has been used for ceramic porous bodies, and a method that can further retain the sulfur content is desired.

[Purpose of the invention]

The present invention was developed in view of the above-mentioned circumstances, and its object is a 4-inch, porous hole L'! It is an object of the present invention to provide a method for chucking a porous body, which can reliably hold even a porous body and allow each (11) processing to be carried out with high accuracy.

[Structure of the invention]

In order to achieve this objective, the chucking method of the present invention uses a magnetic fluid that is solid at room temperature but becomes liquid when heated, and the magnetic fluid is liquefied to form a porous body. The magnetic fluid in the porous body is made into a solid by filling the inside of the porous body and then cooling it, and the porous body treated in this way is held by a magnet.

The present invention will be explained in detail below.

As is well known, a magnetic fluid is made by dispersing colloid-sized ferromagnetic powder in a liquid phase.

However, although the present invention is in a liquid phase and is solid at room temperature,
A substance such as graphine, which becomes liquid when heated to a higher temperature, is used.

The type of ferromagnetic particles dispersed in the liquid phase is not particularly limited. Further, the particle size is sufficient as long as it can pass through the pores of the porous body and be stably suspended in the liquid phase.

The compatibility between the liquid phase and the porous body is not particularly limited. For example, those with a low degree of familiarity (
If a material with a large contact angle is used, it is easy to extract the magnetic fluid, which will be described later. Furthermore, if a material with good compatibility (a material with a small contact angle) is used, the magnetic fluid can easily enter every nook and corner of the pores of the porous material, which has the effect of increasing the retention force.

[Embodiments of the invention]

FIG. 1 is a cross-sectional WJ diagram showing an embodiment of the present invention, in which a ceramic porous body 1 contains a magnetic fluid in a solid state. Reference numeral 2b is a processing table made by Solenoid 5, to which an electromagnet 2 is attached. This '1'ji 6M stone 2 holds the porous body 1 by its magnetic force.

Note that the processing table 2b has protrusions 1; 4ii 2 a and screws 3.
By providing a slider 4 that is moved back and forth by a slider 4 and providing a holding portion with a variable holding span W, the porous body 1 can be prevented from shifting 4j;j, and more secure holding can be achieved.

The present invention thus allows the magnetic fluid to exist in a porous body in a solid state, and holds it by magnetic force.

In order to extract the magnetic fluid from the porous body after processing, etc., the porous body is heated to liquefy the solid magnetic fluid inside, and then a magnetic force is applied to easily extract the magnetic fluid.

In the above description, a ceramic porous body is exemplified as a porous body, but the present invention is not limited to this, and it is clear that porous bodies such as glass, wood, and other paramagnetic bodies may be used. be.

〔Effect of the invention〕

As described above, the present invention allows magnetic fluid to exist in a solid state within a porous body and is held by magnetic force, so even brittle members such as ceramics can be held securely and firmly, making these processing extremely easy. This can be done with high precision. At this time, there is no fear of breaking or notching the porous body. Furthermore, since the magnetic fluid used is one that becomes liquid at ￥ temperature, it is easy to impregnate and remove the magnetic fluid, resulting in excellent workability. Furthermore, by taking out the magnetic fluid from the porous body, there is also the effect that cutting waste and the like can be taken out together with the magnetic fluid.

[Brief explanation of drawings]

FIG. 1 is a cross-section iii+ diagram showing the method of the present invention. 1... Porous body, 2... Electromagnet, 7 Agent: Patent attorney Tsuyoshi Shigeno

Claims (1)

[Claims] (1) A magnetic fluid that is solid at room temperature and becomes liquid when heated is heated to a liquid state, the liquid magnetic fluid is filled into the pores of a porous body, and then cooled and solidified to form a solid. A method for chucking a porous body, the porous body being held by a magnet.