JP4500143B2 - Ice blasting device using ice blast - Google Patents

Description

The present invention relates to ice particles transporting apparatus according to ice blasting.

Conventionally, as a deburring method that removes relatively large burrs that cannot be removed by high-pressure water jet (water jet), a resin such as melamine or nylon, or a medium such as ceramics is mixed into the water jet and jetted at high pressure to eliminate burrs. Medium high-pressure spraying method (see Non-Patent Document 1) and dry ice blasting method that cleans the workpiece by spraying dry ice in the form of pellets and blasting it onto the surface of a jig or tool (see Patent Document 1) ) Etc.
http: // www. sugino. com / (media spray deburring machine) JP 05-113494 A (paragraphs 0003 to 0018, FIGS. 1 to 2)

However, in the medium high pressure injection method, after the medium is ejected, it is necessary to wash the work and completely remove the medium. Media such as ceramics tends to remain in the hole of the work, and the medium is completely removed from the work. A large amount of water must be jetted until it is completely removed. Further, when the collected media is reused, there has been a problem that a grain that has been reduced by repeated use must be classified and removed, which requires a base material such as a classifier.
In addition, the dry ice blasting method has the advantage that dry ice, which is a blasting material, is sublimated from solid to gas after jetting, so there is no need for removal work (secondary treatment), but dry ice pellets (spherical balls) are used. It needs to be manufactured. Production of this dry ice pellet is very expensive, and since it is transported by a gas containing air, the pump device such as a blower that supplies the gas is large, and the horsepower of the motor is large, so the power consumption is large. There was a problem.

Therefore, the present invention was devised to solve these problems, and is good for performing ice blasting by preventing ice clogging without lowering the ice temperature by ice blasting using ice particles. It is an object of the present invention to provide an ice particle transport device using ice blast for supplying fresh ice particles.

The invention according to claim 1 is an ice particle conveying device using ice blasting that jets ice particles together with high-pressure water and removes burrs generated at the corners of the workpiece surface, and an ice making means that is disposed at the top and produces the ice particles; , An ice particle collecting means for collecting ice particles discharged from the ice making means, which is disposed at the lower part of the ice making means, and an ice particle which is disposed at the lower part of the ice particle collecting means and flows down from the ice particle collecting means, e Bei and ice particle receiving means for conveying the workpiece, the said ice particles receiving means are ice particles receiving portion having an elbow-shaped path, an air-blowing injection nozzle disposed in the outer periphery of the ice particles receiving portion a ice particles transporting apparatus according to ice blasting, characterized in that it is.

  The invention according to claim 2 is the ice blasting device (1) by ice blasting according to claim 1, wherein the ice making means makes thin ice stretch inside the drum, which is turned into a rotating claw (2b). It is an internal drum type ice making machine (2) that creates ice particles by scraping.

  The invention according to claim 3 is the ice blasting ice conveying device (1) according to claim 1, wherein the ice collecting means is formed in a conical shape and is a funnel (4). To do.

  The invention according to claim 4 is the ice blast ice ball conveying device (1) according to claim 3, wherein the funnel (4) is made of Teflon (registered trademark) or polypropylene, or other A Teflon (registered trademark) tape is affixed to an inner peripheral surface formed of a material.

  The invention according to claim 5 is the ice blasting ice transfer device (1) according to claim 3, wherein a water jet nozzle (4c) is arranged at the upper end of the funnel (4). It is characterized by.

The invention according to claim 6 is the ice blasting apparatus (1) by ice blasting according to claim 1 , wherein the ice grain receiving part (5) is moved laterally from a position directly below the funnel (4). The moving means to be provided is provided.

According to the invention according to claim 1, the ice making means arranged at the upper part and producing ice grains, the ice grain collecting means arranged at the lower part of the ice making means and collecting the ice grains discharged from the ice making means, It is arranged at the lower part of the ice particle collecting means, and receives ice particles flowing down from the ice particle collecting means, and has an ice particle receiving means for transporting it to the workpiece, thereby enabling a smooth flow along the direction of gravity. Can be configured. In addition, since the media is made unnecessary by using ice particles, it is not necessary to remove or classify the media. Further, since the ice particles are changed from solid to water when melted, it is not necessary to remove the residue on the workpiece, and it is possible to provide an ice particle conveying device using ice blasting that reduces running costs.
Further, the ice grain receiving means is an ice grain receiving part having an elbow-shaped path, and an ice blown nozzle for air blow is arranged on the outer periphery of the ice grain receiving part, so that the ice grains flowing down to the ice grain receiving part Can be blown off to the workpiece by high-pressure water injection, so that the accumulation of ice particles on the inner surface of the elbow can be eliminated .

  According to the second aspect of the invention, the ice making means stretches the ice thinly on the inside of the drum, and scrapes it with a rotating claw to make an internal drum type ice making machine. Compared to a general external drum type ice making machine that is formed on the outside, it is an ice making machine that is advantageous for keeping cold the falling ice particles and can provide an ice particle conveying device by ice blasting.

  According to the third aspect of the present invention, the ice particle collecting means is a funnel formed in a conical shape, can be widely received and collected in a funnel shape, slid downward, collected in the center, and dropped down. .

  According to the invention of claim 4, the funnel is formed of Teflon (registered trademark) or polypropylene, or has a low thermal conductivity because the Teflon (registered trademark) tape is attached to the inner peripheral surface. Since it is a coefficient of friction, the ice particles are difficult to melt and slip easily, so that they can be slid downward and dropped.

  According to the invention which concerns on Claim 5, since the nozzle for water injection is arrange | positioned at the upper end part of the funnel, since the ice particles adhering to the inclined surface of the funnel can be washed away with water, there is no trouble and smooth. Ice grains can be supplied.

According to the invention of claim 6, when the injection stop of the high-pressure water jet nozzle, by the ice particles receiving unit comprising a moving means for moving laterally from the position directly below the funnel, ice particles made of ice machine Can prevent clogging of ice particles and can be recovered from the funnel to the tank.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an ice particle conveying device using ice blasting, in which FIG. 1 (a) is a plan view and FIG. 1 (b) is a front view. As shown in FIG. 1B, the ice making means for producing ice particles in the ice blasting ice carrier 1 according to the present invention is an internal drum type ice making machine 2 here. The inner drum type ice making machine 2 is placed on the upper surface of the gantry 3. In the lower part of the ice making machine 2, ice particle collecting means for receiving and collecting the ice particles discharged from the bottom surface of the ice making machine 2 and being dropped is arranged. The ice particle collecting means is here a funnel 4. In the vicinity of the lower part of the funnel (also referred to as funnel) 4, ice particle receiving means for receiving ice particles flowing down from the lower part of the funnel 4 and transporting them to the hose part 5c (see FIG. 2) is arranged. Here, the ice particle receiving means is the ice particle receiving unit 5. And the hose part 5c is connected to the front-end | tip part of this ice grain receiving part 5, and the high-pressure water injection nozzle (not shown) which injects toward a workpiece | work for deburring is connected to the front-end | tip of the hose part 5c. ing.

  As shown in FIG. 1 (b), the internal drum type ice making machine 2 as ice making means has a thin claw applied to the inside of the drum, and this is attached to a rotating claw provided at the tip of three rotating doors 2a. Scrape off with 2b and drop down. Thus, by adopting the inner drum type ice making machine 2 which is more advantageous than the cooling of the outer drum type ice making machine, the ice particles can be quickly conveyed.

  FIG. 2 is an enlarged perspective view of the funnel and the ice particle receiving portion shown in FIG. As shown in FIG. 2, this conical funnel 4 has an opening 4a having a diameter of about 680 mm, and is formed in a size slightly larger than the diameter D (see FIG. 1) of the revolving door of the ice making unit of the ice making machine 2. Yes. A cylindrical portion 4b having a width of 50 mm is formed in the upper portion of the funnel 4 and eight water injection nozzles 4c are arranged at eight equal intervals in the cylindrical portion 4b. The water injection nozzle 4c forms an L shape, and one of the L shapes can be directed downward and water can be injected downward in a fan shape. A water injection hose 4d is connected to the other of the water injection nozzles 4c. Further, a bolt-through hole 4e for fixing a funnel is formed in the headband-shaped cylindrical portion 4b, and is fixed to the lower surface of the gantry 3 with a bolt (see FIG. 1). Further, the taper angle of the funnel 4 is about 55 °, and a thin tube portion 4f is formed at the lower portion.

The funnel 4 is made of Teflon (registered trademark) or polypropylene, which is a material having a low thermal conductivity and a low friction coefficient. For example, for Teflon (registered trademark), a Teflon (registered trademark) tape may be attached to the surface of the inner peripheral surface, or Teflon (registered trademark) processing may be performed. Alternatively, a material containing Teflon (registered trademark) powder may be used. If these materials are used, the ice particles are not easily melted and slippery, so they are widely received in a funnel shape and slid downward, so that they are easily collected in the center. Further, the water injection by the water injection nozzle 4c is intermittently and periodically determined. For example, after 0.5 seconds of injection and 3 seconds of pause 3 times, it is paused for 60 seconds, but it may be the first 1 second injection at 5 second intervals, or any other cycle. .
At the time of water injection, the final high-pressure water injection nozzle (not shown) is stopped, and the ice particle receiving unit 5 is also moved laterally from a position directly below the funnel 4.

Here, the ice grain receiving means is the ice grain receiving unit 5 having an elbow-shaped path. This ice grain receiving part 5 is comprised by the funnel part 5a, the elbow part 5b, the hose part 5c, and the hose band 5e which fixes the hose part 5c to the elbow part 5b.
3 is a cross-sectional view of the ice grain receiving portion shown in FIG. As shown in FIG. 3, the ice particle receiving portion 5 is disposed in the vicinity of the lower portion of the tube portion 4 f of the funnel 4 without being connected, and by the funnel portion 5 a having a slightly larger diameter than the tube portion 4 f of the funnel 4. The received ice particles suck the ice particles while the direction is changed to the elbow portion 5b in the bent shape of the ice particle receiving portion 5 by the ejector effect of the high pressure water injection nozzle (not shown) at the final end of the hose portion 5c. Further, by the injection energy generated by the high-pressure water injection nozzle at the final end (not shown), the ice particles pass through the hose portion 5c and are conveyed to the workpiece, and the ice particles charged with the impact energy of the high-pressure water are injected toward the workpiece. Then, the deburring of the work is broken from the root and deburring is performed.
The high-pressure water is preferably cooled cold water, and heat exchange between the ice particles and the water at the high-pressure water injection nozzle at the final end of the hose portion 5c is reduced, so that the work reaches the workpiece while holding the ice particles. Cold water is jetted continuously from the high-pressure water jet nozzle.

  The air blow injection nozzle 5d is used to prevent clogging in the elbow by blowing off ice particles that are intermittently injected and deposited on the inner surface of the elbow. The air blow is performed during the high-pressure water jet, for example, a jet for 0.3 seconds and a pause of 30 seconds. This injection pressure is 0.3 to 0.7 MPa.

With reference to FIG. 2, the moving apparatus as a moving means of the ice particle receiving part 5 shown in the lower part of the funnel 4 is demonstrated. As indicated by the two-dot chain line, the moving device for the ice particle receiving unit 5 moves the ice particle receiving unit 5 as the ice particle receiving means from a position directly below the funnel 4 to a lateral position, and It corresponds to when the injection is stopped. As shown in FIG. 2, an air cylinder 8 is held horizontally on the ground by a cylinder fixture (not shown), and the ice particle receiving portion 5 is moved from a position directly below the funnel 4 (ice indicated by a two-dot chain line). Move to grain receiving unit 5).
This is because the inner drum type ice making machine 2 cannot be stopped immediately. Therefore, when the injection of the high pressure water injection nozzle is stopped, the position of the ice particle receiving unit 5 is moved to prevent the ice particle receiving unit 5 from being clogged. . The moving direction of the ice grain receiving unit 5 may be any direction such as left and right and front and rear.
Further, a tank 6 having an opening 9 is provided on the lower surface, and ice particles flowing down from the funnel 4 are collected and reused.

Next, a method for conveying ice particles by ice blasting will be described.
In the ice particle transport method by ice blasting, which deburr the workpiece by spraying ice particles with high pressure water,
In the first step, ice particles are produced by an ice making machine 2 which is an ice making means provided in the upper part.
In the second step, a funnel 4 serving as an ice particle collecting means is arranged at the lower part of the ice making means, and ice particles falling by the ice making machine 2 are collected.
In the third step, an ice particle receiving part 5 is provided at the lower part of the funnel 4 serving as an ice particle collecting means, receives the ice particles flowing down from the funnel 4, and conveys them to the workpiece.
By the steps including these three steps, the ice particles can be transported easily and efficiently.

Next, the operation will be described with reference to the drawings.
As shown in FIG. 1 (b), when the internal drum type ice making machine 2, which is an ice making means, is switched on, the drum rotates and water is sprinkled inside the drum that maintains a low temperature, and instantly inside the drum. Ice is peeled off and scraped off by a rotating claw 2b provided at the tip of the rotating door 2a.
The ice particles scraped off fall downward and fall into the funnel 4 arranged downward. The eight ice spray nozzles 4c, which are disposed in the cylindrical portion 4b at the top of the funnel 4, periodically spray cold water downward by intermittent operation to prevent accumulation of the fallen ice particles. When the ice particles flow down to the ice particle receiving part 5, the ice particles are sucked by the injection of the high-pressure water injection nozzle, and the high-pressure impact energy is loaded on the ice particles, and the ice particles against the work burr. To remove the burr by breaking it from the root of the burr.

When the work deburring operation is completed, the air cylinder 8 shown in FIG. 2 is driven to move the ice particle receiving portion 5 at the same time as the high pressure water injection nozzle (not shown) at the final end of the hose portion 5c is stopped. Avoid clogging with ice particles in part 5 in advance. The ice particles flowing down from the funnel 4 are collected in the tank 6 disposed at the lower part and reused.
When the next workpiece is set, the injection of the high-pressure water injection nozzle resumes, and at the same time, the air cylinder 8 is driven to move the ice particle receiving portion 5 to the original position, and the ice particles flowing down from the funnel 4 are transferred to the workpiece. The burrs are removed by causing the ice particles to collide against the burrs of the workpiece and breaking them from the roots of the burrs.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications. For example, in addition to the funnel 4, the ice grain receiving portion 5 may also be formed of a Teflon (registered trademark) or polypropylene material having a low thermal conductivity and a low friction coefficient. Further, a Teflon (registered trademark) tape may be attached to the inner peripheral surface such as vinyl chloride or stainless steel, or a material having a water repellent function may be coated.

FIG. 1 (a) is a plan view and FIG. 1 (b) is a front view showing an ice particle conveying apparatus using ice blasting according to the present invention. It is the perspective view which expanded the funnel and the ice-drop receiving part shown in FIG.1 (b). FIG. 3 is a cross-sectional view of the ice grain receiving unit shown in FIG. 2.

Explanation of symbols

1 Ice grain transfer device 2 Ice maker (ice making means)
2a Rotating door 2b Rotating claw 3 Base 4 Funnel (ice collection means)
4a Opening 4b Cylindrical part 4c Water injection nozzle 4d Water injection hose 4e Bolt through hole 4f Pipe part 5 Ice grain receiving part (ice grain receiving means)
5a Funnel 5b Elbow 5c Hose 5d Air blow nozzle 5e Hose band 6 Tank 8 Air cylinder 9 Opening

Claims (6)

In the ice particle conveying device (1) by ice blasting, in which ice particles are jetted together with high pressure water to remove burrs generated at the corners of the workpiece surface
An ice making means arranged at the top for producing the ice particles;
Is disposed below the ice making unit, and ice particle collecting means for collecting by said ice particles discharged from the ice-making unit,
Wherein disposed below the ice particles collection means receiving said ice particles flowing down from the ice particles collecting means, Bei example and ice particle receiving means for conveying the workpiece, and
The ice grain receiving means is an ice grain receiving part (5) having an elbow-shaped path, and an air blow injection nozzle (5d) is arranged on the outer periphery of the ice grain receiving part (5). Ice grain conveying device by ice blasting (1).   The said ice making means is an internal drum type ice making machine (2) which makes ice thinly on the inside of a drum and scrapes it off with a rotating claw (2b) to produce ice particles. An ice particle conveying device (1) by the ice blast described.   2. The ice particle conveying device (1) by ice blasting according to claim 1, wherein the ice particle collecting means is a funnel (4) formed in a conical shape.   The ice funnel (4) is formed of Teflon (registered trademark) or polypropylene, or a Teflon (registered trademark) tape is affixed to an inner peripheral surface of the funnel (4). Conveying device (1).   The ice particle conveying device (1) according to claim 3, wherein a water jet nozzle (4c) is disposed at an upper end of the funnel (4). The ice blast conveying device (1) according to claim 1, further comprising moving means for moving the ice particle receiving portion (5) laterally from a position directly below the funnel (4).

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