KR101087751B1 - Grinding discs used in grinders with dust collection - Google Patents

Abstract

The present invention relates to a structure of a polishing disk used in a grinding grinder having a dust collecting function, wherein the polishing disk includes a plurality of dust collecting means in a slit form corresponding to a dust collecting hole of a polishing pad used in the grinding grinder. It is characterized by including.

The dust collecting means of the abrasive disk according to the present invention is composed of slits formed in a spiral shape, a spiral shape or a concentric shape, thereby being compatible with various dust collecting hole patterns of polishing pads provided in various kinds of grinding grinders. Since there is no need to match the dust collecting means formed in the dust collecting hole and the polishing disk with each other, there is an advantage that the user's convenience can be improved.

In addition, since the dust collecting means of the abrasive disk used in the grinding grinder having a dust collecting function according to the present invention is configured in the form of a slit, the total area thereof is minimized, thereby forming the dust collecting means while maintaining dust collecting efficiency equal to or higher than that of the prior art. There is an advantage that can reduce the industrial waste generated in the process and improve the grinding efficiency of the grinder.

Grinding Discs, Dust Collectors, Slits

Description

Grinding Disc for Grinder with Dust Collector {Grinding Disc for Grinder with Dust Collecting Function}

The present invention relates to a polishing disk for use in a grinding grinder, and more particularly to a dust collecting means for dust intake of the polishing disk used in the grinder having a dust collecting function for sucking dust generated during the polishing operation.

In general, a grinder is a kind of surface polishing tool used for processing wood, stone, or metal, and the wood is rotated by rotating the drive shaft at a high speed while the polishing pad and the polishing disk are fixed to the drive shaft. To polish the surface of stone or metal material.

Typically, the polishing pad and the polishing disk have a disk shape, and the surface of the polishing disk, which is in close contact with the surface of the workpiece during polishing and performs polishing, is treated with a material that can be polished, such as sandpaper.

This conventional grinder has a problem that the dust of the workpiece polished by the polishing disk rotating at a high speed during the polishing operation obscures the operator's field of vision so that precise work cannot be performed, and furthermore, the worker's health is threatened by these dusts. there was.

In order to solve this problem, in recent years, a grinder having a dust collecting function for collecting and discharging dust generated during a polishing operation to the outside of the grinder through holes formed in the polishing pad and the polishing disk has been developed. An example is disclosed in Korean Utility Model Registration No. 0378411 (registered notification on March 14, 2005).

However, in the case of a grinder having a conventional dust collecting function, since the patterns of the dust collecting holes formed in the polishing pad and the polishing disk are different according to the products of each manufacturer, there is no mutual compatibility. And to check the model one by one there was a problem causing inconvenience to the user.

In addition, since the dust collecting hole formed in the polishing pad and the polishing disk is composed of a plurality of circular holes, when the user combines the two components, the dust collecting holes must be combined to match each other to obtain a desirable dust collecting effect, which is inconvenient for the user. There is a problem that further weights.

In addition, in the case of the polishing disk, since a dust collecting hole having a size at least equal to the size of the dust collecting hole formed in the polishing pad is formed, not only a large amount of industrial waste is generated during the punching process of the dust collecting hole, but the polishing area is equal to the total area of the dust collecting hole. There is a problem that the overall polishing efficiency is reduced because it is reduced.

The present invention is to solve the problems of the prior art described above, the object of the present invention is a polishing having a dust collecting means used in the grinder having a dust collecting function compatible with various dust collecting hole patterns of the polishing pad provided in the grinder It is to provide a disk.

In addition, another object of the present invention to provide a polishing disk having a dust collecting means used in the grinder having a dust collecting function that does not need to match the dust collecting hole of the polishing pad and the dust collecting means formed in the polishing disk during the grinder operation. It is for.

In addition, another object of the present invention is to minimize the total area of the dust collecting means formed on the abrasive disk, while reducing the industrial waste generated in the process of forming the dust collecting means and the grinding efficiency of the grinder while maintaining the dust collecting efficiency equivalent to the prior art An object of the present invention is to provide an abrasive disc having a dust collecting means for use in a grinder having a dust collecting function capable of improving the efficiency.

In order to achieve the above object, the present invention, in the structure of the polishing disk used in the grinding grinder having a dust collecting function, the polishing disk is a slit (slit) corresponding to the dust collecting hole of the polishing pad used for the grinding grinder It characterized in that it comprises a plurality of dust collecting means in the form.

In addition, the plurality of dust collecting means is characterized in that arranged in a spiral form with respect to the center of the abrasive disk.

In addition, the plurality of dust collecting means is characterized in that arranged in the form of a spiral with respect to the center of the abrasive disk.

In addition, the plurality of dust collecting means is characterized in that arranged in a concentric manner with respect to the center of the abrasive disk.

In addition, when viewed from the bottom of the polishing disk, the vortex or spiral shape is characterized in that formed in the rotational direction of the polishing disk.

As described above, the abrasive disc used in the grinder having a dust collecting function according to the present invention has a variety of polishing pads provided in various types of grinders by having dust collecting means composed of slits arranged in a spiral shape, a spiral shape or a concentric shape. It can be compatible with the dust collecting means pattern, and there is an advantage that it is possible to enhance the user's convenience because it is not necessary to match the dust collecting means formed on the polishing pad and the polishing disk in use.

In addition, the abrasive disk used in the grinder having a dust collecting function according to the present invention is provided with a dust collecting means composed of a slit shape, so that the total area is minimized, while forming the dust collecting means while maintaining a dust collecting efficiency equal to or higher than the prior art. There is an advantage that can reduce the industrial waste generated in the process and improve the grinding efficiency of the grinder.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a partial cutaway perspective view showing a grinder having a dust collecting function according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the grinder of FIG.

In the present embodiment, an air orbital sander which is generally used as an example will be described as an example, but the present invention may be applied to all grinders having a dust collecting function, without being limited thereto.

The grinder 1 of FIG. 1 is formed in the main body 11, the air inflow port 12 and the air discharge port 13 formed in the main body 11, and the main body 11, and the air inflow port ( And an air motor 14 including a rotor 15 and a shaft 16 that are rotated by the air introduced by 12.

In addition, the grinder 1 according to the present embodiment is a grinding coupled to the lower end of the power transmission shaft 17, the power transmission shaft 17 installed eccentrically with the shaft 16 of the air motor 14 by a predetermined dimension. It further comprises a pad 18 and an abrasive disk 19 attached to the polishing pad 18.

In addition, an upper end of the main body 11 is provided with a switch lever 20 and an on-off valve 21 for determining the shutoff and supply of air by the operation of the switch lever 20, and the lower end of the main body 11. The inner space portion 11a which can completely cover the upper surface of the polishing pad 18 is provided, one side of the space portion 11a of the main body 11, the dust collecting path 23 communicated to the air discharge port 13 Is installed.

At this time, the air discharge port 13 may be further connected to the suction means (not shown) to improve the dust collection function, unlike the present embodiment, the dust collecting path 23 is connected to the suction means not shown It may be configured to be connected separately.

Since the structure of the grinder provided with such suction means is a known technique, detailed description thereof is omitted here.

3 is a view showing the structure of a conventional abrasive disk.

As shown in FIG. 3, the polishing pad 18 has a plurality of circular dust collecting holes 22 penetrating the inside thereof at predetermined intervals, so that dust or foreign matter generated during the polishing operation will be described later. It provides a route to the outside to be discharged.

In this case, the dust collecting hole 22 formed in the polishing pad 18 may be formed in various patterns according to the manufacturer or model of the grinder, and is generally formed to be arranged in the circumferential direction as shown in FIG. 3. .

In addition, a plurality of dust collecting means are formed in the polishing disk 19 attached to the polishing pad 18 as described below. In the case of the polishing disk 19 according to the present invention, instead of the dust collecting holes, It is characterized by having a dust collecting means of the slit (slit) type.

4 shows various specific embodiments of the structure of the polishing disk according to the present invention, and FIG. 5 shows the polishing disk 19 according to the present invention coupled to the bottom of the polishing pad 18 shown in FIG. It is a bottom view which shows the state.

In the abrasive discs 19 to 4 of Fig. 4, a plurality of slit dust-collecting means 25 are arranged in a vortex, a spiral shape and a concentric shape with respect to the center of the polishing disc 19, respectively. In this case, the slit shape is preferably a mark cut by a cutting tool such as a blade, but may be molded in the shape of a fine gap as necessary.

In this case, it is preferable that the vortex-shaped or spiral-shaped dust collecting means 25 is formed in the rotational direction of the polishing disk 19 when viewed from the bottom of the polishing disk 19. In FIG. ) Is a bottom view showing the bonding state of the polishing pad 18 and the polishing disk 19 with respect to the case where the rotation of the < RTI ID = 0.0 > clockwise < / RTI >

As described above, when the dust collecting means 25 having the spiral shape and the spiral shape is formed in the rotational direction of the polishing disk 19, the dust collecting means 25 performs the same function as the impeller, and thus dust generated during the polishing operation. It has the advantage that it can be more easily discharged to the space (11a).

In addition, as illustrated in FIG. 5, the dust collecting means 25 of at least one polishing disk 19 communicating with each of the dust collecting holes 22 formed in the polishing pad 18 may collect dust of the polishing pad 18. Since the above-described dust suction force is applied not only to the area corresponding to the area of the hole 22 but also to the entire slit shape, the total area of the dust collecting means 25 is reduced, as can be seen from the experimental results described later. It is possible to obtain dust collection efficiency equal to or greater than.

In addition, each of the slit-shaped dust collecting means 25 has a plurality of discontinuous portions 26 as shown in FIGS. 4B and 4C to prevent deformation or damage of the polishing disk 19 during the polishing operation. ) Is preferably formed, and such a discontinuous portion 26 may also be formed with respect to FIG.

The dust collecting means may be alternately arranged in the form of a continuous slit and a discontinuous slit having a plurality of discontinuous portions.

In this case, the rigidity of the abrasive disc can be further maintained.

As such, since the dust collecting means 25 of the abrasive disk 19 according to the present invention is formed in a slit shape, it is possible to make almost no waste produced in the process of punching a circular dust collecting hole according to the prior art. have.

In addition, since the area of the entire dust collecting means 25 is significantly smaller as compared with the circular dust collecting hole according to the prior art as described above, the overall polishing efficiency of the grinder 1 is increased by increasing the effective polishing area of the polishing disk 19. The advantage is that it can be improved.

Further, in the polishing disk 19 according to the present invention, since the long slit-shaped dust collecting means 25 is arranged radially about the center of the polishing disk 19, the polishing pad 18 as shown in FIG. There is an advantage that the dust collecting passage 22 can be easily formed in the dust collecting hole 22 structure having any pattern formed thereon.

Therefore, the abrasive disk 19 according to the present invention is compatible with the grinders of various various products, as well as the dust collecting hole 22 and the dust collecting means 25 of both parts when combined with the polishing pad 18. Since the effort for matching can be omitted, the user's convenience can be remarkably improved in comparison with the prior art.

An operation relationship for the grinder 1 having the above configuration will be described as follows.

First, an air hose (not shown) connected to an air supply source (not shown) is connected to the air inflow port 12, and then the switch lever 20 is opened to open and close the valve 21 to air the air motor 24. When the air motor 14 rotates, the shaft 16 and the power transmission shaft 17 connected thereto are eccentrically rotated at high speed.

As a result, the polishing pad 18 and the polishing disk 19 mounted on the power transmission shaft 17 rotate at a high speed to polish the surface of the workpiece such as wood, stone or metal.

In addition, the dust or foreign substances generated in the process of polishing the surface of the workpiece as described above is the main body 11 through the dust collecting means 25 formed in the polishing pad 18, the dust collecting hole 22 and the polishing disk 19. It flows into the space part 11a of the lower end.

The dust or foreign matter introduced into the space 11a is transferred to the air discharge port 13 along the dust collecting path 23 installed at one side of the space 11a and then through the air discharge port 13. The discharged air may be discharged to the outside together with the discharged air, or may be discharged to the outside by the suction means (not shown) separately to the dust collecting path 23 as described above.

The results of performing the performance test on the polishing disk 19 according to the present invention having the configuration as described above and the polishing disk according to the prior art are shown in <Comparative Table 1> below.

<Comparative Table 1>

con New (ⓐ) New (ⓑ) New (ⓒ) New (ⓓ) Grinding amount (g) 7.9 8.2 8.1 8.5 8.4 Roughness (Ra) 0.214 0.210 0.210 0.215 0.212 Dust resistance
(anti-loading) 0.87 g 0.10 g 0.15 g 0.14 g 0.18 g usually good good good good

At this time, the type of sand sander was used DYNABRADE SANDER (ORBITAL) 6 inches, the rotational speed is # 8000 ~ 10,000 RPM, the grinding amount is a total of 10 times each 2 to 3 minutes after grinding the average value.

The comparative experiments were performed using P320 in Applicant's SA 331 film abrasive disc product.

The product is mainly used to grind paint components applied to automobile exteriors, and as a film polishing disk, a velcro or the like is attached to one surface and can be directly attached to the grinder even if a coupling hole is not formed for the grinder.

In the comparative experiments, in the case of the abrasive disk 19 according to the present invention, the dust collection efficiency was found to be greatly increased while maintaining the same level or higher than in the prior art, according to the above-described present invention. The advantages of the abrasive disc 19 could be practically confirmed.

1 is a partial cutaway perspective view showing a grinder having a dust collecting function according to an embodiment of the present invention,

2 is a cross-sectional view of the grinder of FIG.

3 is a plan view illustrating a dust collecting hole structure formed in the polishing pad of FIG. 1;

FIG. 4 is a bottom view illustrating various types of dust collecting holes formed in the polishing disk of FIG. 1; FIG.

FIG. 5 is a bottom view illustrating a state in which a polishing disk is attached to a bottom of the polishing pad of FIG. 1.

Claims (7)

delete In a grinding disc used in a grinding grinder having a dust collecting function, It includes a plurality of dust collecting means in the form of a slit (slit) corresponding to the dust collecting hole of the polishing pad used for the grinding grinder, The plurality of dust collecting means is a polishing disk having a dust collecting function, characterized in that arranged in a spiral form with respect to the center. In a grinding disc used in a grinding grinder having a dust collecting function, It includes a plurality of dust collecting means in the form of a slit (slit) corresponding to the dust collecting hole of the polishing pad used for the grinding grinder, And said plurality of dust collecting means are arranged in a spiral form extending in a centrifugal force direction with respect to a center thereof. In a grinding disc used in a grinding grinder having a dust collecting function, It includes a plurality of dust collecting means in the form of a slit (slit) corresponding to the dust collecting hole of the polishing pad used for the grinding grinder, And said plurality of dust collecting means are arranged concentrically with respect to the center. delete The method according to any one of claims 2, 3, and 4, And said dust collecting means further has a plurality of discontinuities. The method according to any one of claims 2, 3, and 4, And said dust collecting means has a continuous slit shape and a discontinuous slit shape having a plurality of discontinuities.

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