JP2001025968A - Liquid honing device using ice slurry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the quality of the blasting work by unifying the grain size of icicles. SOLUTION: This honing device comprises a supercooling ice-making device 1, a cooling water feed device 7, and an icicle mixing tank 6 to make ice slurry 20 of a desired concentration by mixing icicles 11 to be fed from the supercooling ice-making device 1 and the temperature-controlled water to be fed from the cooling water feed device 7. The ice slurry 20 made in the icicle mixing tank 6 is pumped into a blast gun 16 by a slurry pump 17, and ejected from the blast gun 16 by the compressed gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid honing apparatus using an ice slurry, and more particularly, to a blast processing without damaging soft workpieces which are susceptible to damage. The present invention relates to a liquid honing apparatus capable of performing the following.

[0002]

2. Description of the Related Art A slurry in which an abrasive is dispersed in a liquid such as water is made to collide with the surface of a workpiece at a high speed to finish the surface of the workpiece, undercoat treatment, cleaning, deburring, descaling, Liquid honing for performing peening or the like is widely used in various industrial fields.

[0003]

However, some workpieces do not like residual abrasives or surface damage. In such a case, ice blasting using ice particles as abrasives is not preferred. The device is used. Conventional ice blasting equipment stores block-shaped block ice produced by an ice maker in an ice storage tank, ice-cuts it into slices using an ice-breaker, sends it into an ice particle mixing tank, and mixes it with water. An ice slurry was sent to a blast gun by a slurry pump under a pressure of a slurry pump, and was sprayed on the surface of a workpiece with a compressed gas such as air.

However, in the prior art, since the ice grains are produced by an ice-sharpening machine, it is difficult to stabilize the grain size of the ice grains, and the grain size distribution of the ice grains is as wide as about 2 mm to 9 mm. Some thin metal plates are damaged by large ice particles and cannot be used depending on the material of the workpiece.

An object of the present invention is to solve the above-mentioned conventional problems relating to liquid honing.
An object of the present invention is to provide a new liquid honing apparatus which can safely process even a soft workpiece which may be damaged by a conventional liquid honing apparatus using an ice slurry. It is.

[0006]

SUMMARY OF THE INVENTION The present invention provides a supercooled water ice making device 1, a cooling water supply device 7, an ice particle 11 supplied from the supercooled water ice making device 1, and a supply from the cooling water supply device 7. And an ice particle mixing tank 6 for producing an ice slurry 20 having a desired concentration by mixing the water whose temperature is controlled, and blasting the ice slurry 20 formed in the ice particle mixing tank 6 by a slurry pump 17. The above problem is to be solved by feeding the gas to the gun 16 and injecting the compressed gas from the blast gun 16.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a liquid honing apparatus using an ice slurry according to the present invention will be described with reference to FIG. In the figure, reference numeral 1 denotes a supercooled water ice making device, which is a supercooling unit 2 for cooling water to a supercooled state, and ice making which causes supercooled water 3 produced by the supercooled unit 2 to fall and collide to crystallize ice particles 11. A plate 4 and a conduit 5 for guiding the supercooled water 3 above the ice making plate 4. The supercooled water 3 is water that has been cooled to a temperature below the freezing point (about −2 ° C.) and is not frozen, and retains a liquid phase because impurities have been removed. It has the property of freezing momentarily.

On the other hand, 6 is an ice particle mixing tank located immediately below the ice making plate 4 of the supercooled water ice making apparatus 1, and 7 is a cooling water supply device for supplying temperature-controlled water to the ice particle mixing tank 6. The amount of water supplied from the cooling water supply device 7 to the ice particle mixing tank 6 is adjusted by a solenoid valve 8. Further, a stirring blade 10 driven by a motor 9 is located in the ice particle mixing tank 6, and the ice particles 11 crystallized by the ice making plate 4 of the supercooled water ice making apparatus 1 and the cooling water supply. The water supplied from the apparatus 7 is stirred to produce a uniform ice slurry 20.

In the figure, reference numeral 12 denotes a slurry monitor.
The conduits 13 and 15 are connected to the ice particle mixing tank 6 via a slurry pump 14 so that the concentration of the ice slurry 20 is always detected. The concentration of ice slurry-20 is
The electromagnetic valve 8 of the cooling water supply device 7 is appropriately opened and closed based on the detection result of the slurry monitor 12, and the amount of water flowing into the ice particle mixing tank 6 is adjusted to be maintained at a set value. I have. In the figure, reference numeral 16 denotes a blast gun, in which an ice slurry 20 is pressure-fed from an ice particle mixing tank 6 by an ice slurry supply pipe 18 via a slurry pump 17 and compressed gas supplied by a compressed gas supply pipe 19. This causes the ice slurry 20 to be jetted. Usually, air is used as the compressed gas. In addition, without using compressed gas (air), the pressure of the slurry pump 17 causes
0 may be injected.

This embodiment has the above-described configuration, and the supercooling unit 2 of the supercooled water ice making apparatus 1 cools the subcooled water to below the freezing point (about -2 ° C. in this embodiment). The cooling water 3 is caused to collide with the ice making plate 4 from the conduit 5 and is instantaneously frozen by the impact to form ice particles 11, which are successively supplied to the ice particle mixing tank 6. The ice grains 11 are stable at an IPF (ice making rate) of about 60%,
The particle size is extremely uniform, about 1 mm to 2 mm. The ice particles 11 supplied to the ice particle mixing tank 6 are mixed with temperature-controlled water supplied from a cooling water supply device 7 to form an ice slurry 20 having a predetermined concentration, thereby forming a blast gun 1.
6 and is accelerated by the compressed gas sent from the compressed gas supply pipe 19 and sprayed from the blast gun 16 toward the surface of the workpiece, and used for surface processing of the workpiece.

[0011]

According to the present invention, the ice particles used for the ice slurry have a particle size of about 1 mm to 2 mm and are highly uniform, and are not covered by the conventional liquid honing apparatus using the ice slurry. Even when the workpiece surface is damaged, not only can the blast work be performed without any problem, but also the uniformity of the ice particles can improve the quality of the blast work, It is very useful for deburring and cleaning of parts. Also, instead of slicing solid block ice with an ice-sharpening machine as in the conventional apparatus, ice particles are made directly from the supercooled water. It is extremely excellent from the viewpoint of energy.

[Brief description of the drawings]

FIG. 1 is an explanatory view of one embodiment of a liquid honing apparatus using an ice slurry according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 supercooled water ice making device 2 supercooled part 3 supercooled water 4 ice making plate 5 conduit 6 ice particle mixing tank 7 cooling water supply device 8 solenoid valve 9 motor 10 stirring blade 11 ice particle 12 slurry monitor 13 conduit 14 Slurry pump 15 Conduit 16 Blast gun 17 Slurry pump 18 Ice slurry supply pipe 19 Compressed gas supply pipe 20 Ice slurry

[Procedure amendment]

[Submission date] October 26, 1999 (1999.10.
26)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 3

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

This embodiment has the above-described configuration, and the supercooling unit 2 of the supercooled water ice making apparatus 1 cools the subcooled water to below the freezing point (about -2 ° C. in this embodiment). The cooling water 3 is caused to collide with the ice making plate 4 from the conduit 5 and is instantaneously frozen by the impact to form ice particles 11, which are successively supplied to the ice particle mixing tank 6. The ice grains 11 are stable at an IPF (ice making rate) of about 60%,
The particle size is extremely uniform, about 0.2 mm to 0.6 mm. The ice particles 11 supplied to the ice particle mixing tank 6 are mixed with temperature-controlled water supplied from the cooling water supply device 7 to form an ice slurry 20 having a predetermined concentration and send it to the blast gun 16. The gas is accelerated by the compressed gas sent from the compressed gas supply pipe 19 and is sprayed from the blast gun 16 toward the surface of the workpiece to be used for surface processing of the workpiece.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011]

According to the present invention, the ice particles used in the ice slurry have a uniform particle size of about 0.2 mm to 0.6 mm, and the liquid particles using the conventional ice slurry are used. Honing equipment can not only perform blasting work without any problem even if it damages the surface of the workpiece, but also improves the quality of blasting work by uniformizing the particle size of ice particles. It is very useful for operations such as deburring and cleaning precision parts. Also, instead of slicing solid block ice with an ice-sharpening machine as in the conventional apparatus, ice particles are made directly from the supercooled water. It is extremely excellent from the viewpoint of energy.

Claims (3)

[Claims] 1. A supercooled water ice making device 1, a cooling water supply device 7, and ice particles 11 supplied from the supercooled water ice making device 1.
And an ice particle mixing tank 6 for mixing the temperature-controlled water supplied from the cooling water supply device 7 to produce an ice slurry 20 having a desired concentration. The ice slurry formed in the ice particle mixing tank 6 is provided. 2
A liquid honing apparatus using an ice slurry, characterized in that 0 is pressure-fed to a blast gun 16 by a slurry pump 17 and jetted from the blast gun 16 by compressed gas. 2. A supercooling water ice making device 1 which makes supercooling water having a temperature below the freezing point, and an ice making plate which causes supercooling water sent from the supercooling unit 2 to fall and collide to crystallize ice particles 11. The liquid honing device using the ice slurry according to claim 1, wherein the liquid honing device comprises: 3. The liquid honing apparatus using an ice slurry according to claim 1, wherein the ice particles constituting the ice slurry have a uniform particle size of about 1 mm to 2 mm.