JP2003001625A - Coolant for tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a situation easy to control sludge of chips and the like by decreasing an amount of coolant and preventing scattering and diffusion of chips by using foam when a tool is used. SOLUTION: The coolant in which a foaming agent is mixed is fed to an edge of the tool and the like.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] This invention is applicable to concrete, stone,
Used when cutting, piercing, and grinding ceramics, etc., when using cemented carbide tools and diamond tools.

[0002]

2. Description of the Related Art Generally, water is often used as a coolant when processing concrete, stones, ceramics and the like.

However, for example, in the dismantling work of a nuclear power plant, when a diamond wire saw, a diamond bit, a diamond blade and the like are used, a large amount of water is used as a coolant, and the water is contaminated by radioactivity. Therefore, it costs money to process and recover them.

Also in general buildings, a large amount of coolant pollutes the building, leaks water downstairs, and damages the electrical system.

Furthermore, for example, in the case of harbor construction, etc.
Sludge water with chips mixed in the coolant used for perforation also flows into the sea, causing natural destruction.

[0006]

In view of the above points, the present invention prevents the reduction of the amount of the coolant and the scattering and diffusion of the coolant by using bubbles, and further secures a situation in which sludge such as chips is easily managed. Especially.

[0007]

According to the first aspect of the present invention, a foaming agent is mainly used to form bubbles having a small diameter, and a cooling agent is supplied to a portion in need thereof.

The second aspect of the invention refers to a foaming agent for ensuring the diameter of the foam necessary for the foam to function and the time until the foam disappears, that is, the strength and life of the foam.

The blowing agent used in the present invention mainly refers to a surfactant / water-soluble polymer, but is not limited thereto. Further, the ratio of the surfactant or the water-soluble polymer may be arbitrarily mixed and used.

The amount of the foaming agent and the liquid to be diluted is smaller than the amount of the conventional coolant which relies only on the liquid. During processing, chips are entrapped in the bubbles and there is little or no scattering. Also, bubbles containing chips flow very slowly compared to liquids and are easy to manage.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial vertical sectional view of the embodiment.

A core bit 1 is mounted on a punching device body 2 mounted on a wall surface of a concrete structure 10. The punching device main body 2 has a base 5 which can be fixed by an anchor or the like so as to be fixed to the concrete structure 10. In the punching device main body 2 including the rack 7 of the column 6 and the pinion meshing with the rack 7, the core bit 1 can be moved forward and backward by turning the handle 8.

The core bit 1 mounted on the main body 2 of the punching device which incorporates the motor with the speed reducer rotates to punch the concrete structure 10. The foam supplied from the hose 9 fills the core bit 1 from the water supply port 4 of the drilling device, reaches the tip of the core bit 1, and is discharged to the outside of the core bit 1 along with the concrete chips generated during drilling.

FIG. 2 is a vertical sectional view of a device for supplying bubbles to the hose 9. Tank 20 having discharge port 23
Is mixed with water and a surfactant. The compressed air sent from the compressor 26 passes through a regulator 24 for pressure adjustment, and is divided into a pipe 22 that applies pressure to the liquid surface in the tank 20 and a hose 9 that is connected to a perforation device. The adjusting valve 25 is for adjusting the amount of compressed air passing through the hose 9 in order to control the properties of bubbles.

The drilling test uses a core bit with a diameter of 100 mm, the rotation speed is 900 rotations / minute, and the drilling speed is 50 mm.
/ Perforated reinforced concrete per minute.

The surfactant was 2 to 5 percent of the anionic surfactant ammonium lauryl sulfate mixed into water. The diameter of the bubbles formed at this time is estimated to be 10 microns to 1 mm.

Generally, the amount of water used under the above conditions is 2 to 3 liters per minute, but the amount of water used when foaming was 200 cc to 500 cc per minute.

When ammonium lauryl sulfate used as a foaming agent was mixed in 1 liter of water in an amount of 5% to form a foam with the apparatus shown in FIG. 2, the volume became about 20 times. The compressed air at this time was 5 kgf / cm ² .

Further, chips and bubbles of concrete or the like discharged to the outside of the diamond bit during drilling are deposited on the floor surface along the wall of the concrete structure 10, but remain within about 30 cm in diameter, and are cooled. When only water was used as the agent, it was limited to a very small area in comparison with the fact that the water spread to 1 to 1.5 m.

The present invention can be used not only as a drilling tool. Especially for the diamond wire saw, the chips discharged along with the bubbles could be managed systematically without scattering.

Ultrasonic waves may be used as a foam supply device, or the generated foam may be supplied using a pump.

[0021]

According to the present invention by the above method, the amount of water used as the cooling liquid was 10 to 20% as compared with the case where only conventional water was used as the cooling agent. Further, the chips that were wrapped in bubbles and discharged were deposited without splattering around the diamond bit and directly underneath it, so that the chips were easily carried out.

Further, the drilling condition was more stable than that of the conventional water-only coolant. This is because the bubbles spread over the entire tip of the core bit as compared with water, and due to the nature of the bubbles, the action of preventing clogging of the cutting edge of the core bit worked by piercing with a minimum amount of cooling liquid.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view when using a drilling tool according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the foam supply device.

[Explanation of symbols]

1 cored bit) 2 Punching device body 3 Perforator water inlet 4 base 5 props 6 racks 7 handle 8 hose 9 concrete structures 20 tanks 21 Foaming agent mixed liquid 22 Tank pressure hose 23 Suction hose with foaming agent mixed liquid 24 regulator 25 Adjustment valve 26 Compressor

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinichi Kizawa             4-10-3 Kamiyabe, Sagamihara City, Kanagawa Prefecture F-term (reference) 3C011 EE02                 3C069 AA01 AA04 BB02 BB04 CA01                       CA03 CA07 DA01 DA06 EA00

Claims (2)

[Claims] 1. Use of bubbles as a coolant when machining with a cemented carbide tool or a diamond tool. 2. The foaming agent is made of a surfactant or a water-soluble polymer and corresponds to the use according to claim 1.