JP6111301B2 - Cleaning brush - Google Patents

Description

  The present invention relates to a polishing brush capable of performing brushing processing on an inner peripheral surface portion of a pipe including a cylindrical body made of metal or non-ferrous metal.

  In general, a rotating brush that has excellent polishing ability and a good finished surface can be used as a tool to polish and remove metal working surfaces and welds, and to polish and remove burrs and rust generated on metal surfaces. Many are used (refer patent document 1). However, this type of conventional rotating brush cannot perform brushing such as polishing, grinding, deburring, rust removal, and paint peeling on the inner peripheral surface of the metal pipe.

  Therefore, as an example of a brush for cleaning the inside of a pipe, for example, a brush in which a brush body is formed by bundling both ends of a plurality of wires twisted with a triangular wire having a triangular cross-sectional shape is developed. Yes. In this brush, a support shaft of a metal rod is disposed at the axial center portion of the brush body, and both ends of a plurality of wires each having a triangular line twisted are bundled at both ends of the support shaft. An intermediate portion between both ends of each wire is curved radially in a direction away from the support shaft.

  When this brush is used, a brush body having a diameter substantially the same as the inner diameter of the pipe is inserted into the pipe, and the base end portion of the brush body is attached to an electric drill or the like and rotated. Alternatively, the brush body may be reciprocated in the axial direction of the pipe. Thereby, it has the structure which brushes to the internal peripheral surface part of a metal pipe by making the corner | angular part of the triangular wire of a brush contact and grind | in contact with the internal peripheral surface part of a metal pipe.

Japanese Patent Laid-Open No. 8-131258

  The conventional brush that cleans the inside of a pipe is shaped so that the triangular wire of the metal wire expands radially, so the outer diameter of the brush must be physically smaller than the inner diameter of the pipe. If you do not work. In order to facilitate the work, it is necessary to increase the clearance between the pipe inner diameter and the brush outer diameter. Therefore, it is difficult to make the brush uniformly contact the entire inner surface of the pipe in the inner surface processing of the pipe, and abundant experience is required to perform the processing evenly. Furthermore, since the corners of the triangular wire of the brush are in contact with the inner surface of the pipe, the contact portion between the inner surface of the pipe and the brush is a point contact, so that the work efficiency is low.

  In addition, the brush using the metal wire having the above-described conventional configuration cannot change the outer diameter of the brush. Furthermore, since there is a possibility that a lot of scratches may be made on the inner surface of the pipe after the insertion until the brush is inserted into the processing portion of the pipe, it is not suitable for precise processing and the demand is limited.

  Further, since the support shaft of the metal rod is arranged at the shaft center portion of the brush body, the brush body has high rigidity, and for example, inner surface processing of a pipe such as a curved curved pipe cannot be performed.

  The present invention has been made paying attention to the above circumstances, and its purpose is to provide a polishing brush that can easily perform a brushing process in a pipe, has high work efficiency, and is suitable for precise processing. There is to do.

An aspect of one aspect of the present invention is a polishing brush that is inserted into a pipe to be processed and performs a brushing process on an inner peripheral surface portion of the pipe, and includes a plurality of brush bristles made of resin filaments containing abrasive grains. A bundle of brush hair bundles, a resin pipe that accommodates the brush hair bundle, a fixing portion that fixes one end of the brush hair bundle and one end of the resin pipe, and the brush from the other end of the resin pipe A brush working part formed by a projecting part projecting the other end of the hair bundle, and the brush working part is inserted in the pipe to be processed in the direction around the axis. The brush is brushed on the inner peripheral surface portion of the pipe by rotating in the axial direction and moving in the axial direction while deforming in the direction in which the brush bristle bundle is expanded .
In the polishing brush having the above configuration, after the brush working part is inserted into the metal pipe, the brush working part is mainly subjected to a brushing process by rotating the brush working part. At this time, by rotating the brush working part at a high speed, the brush bristle bundle of the brush working part can be expanded in the radial direction of the pipe by centrifugal force, and the brush bristle contacts the entire inner peripheral surface part of the metal pipe. Can be made. This makes it possible to easily perform brushing processing such as polishing, grinding, deburring, rust removal, and paint peeling on the inner peripheral surface of the metal pipe.

Preferably, the brush working unit is in a first form in which the plurality of brush bristles are held in an unconstrained state in which the plurality of brush bristles can be freely moved, or in a constrained state in which the plurality of brush bristles are bent in a U shape. It has at least any one of the 2nd form to hold | maintain.
Preferably, the fixing portion includes a metal case, and the metal case caulks and fixes the one end portion of the bristle bundle and the one end portion of the resin pipe integrally.
Preferably, the resin pipe can be cut according to a protruding amount of the brush working portion protruding from the other end portion of the resin pipe.
Preferably, the resin pipe is at least one of a hard resin pipe having high rigidity and a soft resin pipe having high flexibility.

  ADVANTAGE OF THE INVENTION According to this invention, the operation | work which performs a brushing process in a pipe can be performed easily, work efficiency is high, and the polishing brush suitable for a precise process can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows schematic structure of the whole polishing brush of the 1st Embodiment of this invention. An example of the use state of the scouring brush of 1st Embodiment is shown, (A) is a longitudinal cross-sectional view of the principal part which shows the state which inserted the scouring brush in the inside of a pipe, (B) is (A) IIB-IIB sectional view taken on the line of FIG. The longitudinal cross-sectional view of the principal part which shows another example of the use condition of the polishing brush of 1st Embodiment. The longitudinal cross-sectional view of the principal part which shows the use condition which inserts the polishing brush of FIG. 3 in the horizontal hole of the side surface of a pipe, and removes a crossing burr | flash. The longitudinal cross-sectional view of the principal part which shows the 2nd Embodiment of this invention. The longitudinal cross-sectional view of the principal part which shows an example of the use condition of the polishing brush of 2nd Embodiment. The longitudinal cross-sectional view which shows the schematic structure of the whole polishing brush of the 3rd Embodiment of this invention.

[First Embodiment]
(Constitution)
1 and 2 show a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view showing a schematic configuration of the entire polishing brush 1, and FIGS. 2A and 2B show an example of a usage state of the polishing brush 1. FIG. FIG. 2B is a cross-sectional view taken along the line IIB-IIB in FIG. 2A, showing a state in which the brush 1 is inserted into the metal pipe 2 to be processed.

  The polishing brush 1 of the present embodiment is a tool that can perform brushing processing on the inner peripheral surface portion of a metal pipe 2 including a cylindrical body such as a metal to be processed or a non-ferrous metal. As shown in FIG. 1, the polishing brush 1 includes a brush bristle bundle 3 in which a plurality of bristles 3 a are bundled, a resin pipe 4, a fixing part 5, and a brush working part 6. The brush bristles 3a are made of resin filaments containing abrasive grains formed of a resin material such as “N-GRIT” or “Negrit” (registered trademark) obtained by processing nylon and abrasive grains (grit) as filaments for brushes.

  The material of the brush bristles 3a of this embodiment is made by mixing nylon and silicon carbide grit or nylon and aluminum ocside and extruding them as brush filaments. This bristle 3a has a sharp edge of grit mixed in the base material nylon, which is randomly fixed on every surface, so it can capture any shape of work surface and exhibit polishing performance. It has been confirmed. Furthermore, the bristles 3a of this embodiment are resin wires with abrasive grains excellent in heat resistance (melting point 217 ° c) and can withstand work in places where it is difficult to release frictional heat, such as narrow work, Welding to the contact surface can be prevented.

  The resin pipe 4 is an outer pipe that accommodates the brush bristle bundle 3. The resin pipe 4 is formed of a hard resin pipe having high rigidity, for example, ABS resin. The fixing part 5 has a metal case 7 that fixes one end part of the bristle bundle 3 and one end part of the resin pipe 4. The metal case 7 includes a bottomed cylindrical case body 7a and a round bar shaft 8 fixed to the bottom 7b of the case body 7a. The case body 7a of the metal case 7 has a caulking fixing portion 7c that caulking and fixing one end portion of the bristle bundle 3 and one end portion of the resin pipe 4 integrally.

  The brush working part 6 is formed by a projecting part 9 that projects the other end part of the brush bristle bundle 3 from the other end part of the resin pipe 4 (the end part opposite to the fixed end part with the metal case 7). Yes. The bristle bundle 3 arranged in the protruding portion 9 is held in a first form in which a plurality of bristle bristles 3a are held in an unconstrained state where they can freely move. Therefore, in the brush working unit 6 of the present embodiment, the plurality of brush bristles 3a can be freely moved.

(Function)
Next, the operation of the polishing brush 1 having the above configuration will be described. When the polishing brush 1 of the present embodiment is used, as shown in FIG. 2A, the polishing brush 1 is inserted from the opening end on one end side of the metal pipe 2 to be processed. At this time, the brush 1 is inserted from the brush working unit 6 side of the brush 1 into the open end on one end side of the metal pipe 2. The outer diameter of the brush working part 6 of the polishing brush 1 used at this time is preferably smaller than the inner diameter of the metal pipe 2.

  After the brush working unit 6 is inserted into the metal pipe 2, the brush working unit 6 is mainly rotated to perform a brushing process on the metal pipe 2. Thereby, it is possible to easily perform brushing processing such as polishing, grinding, deburring, rust removal, paint peeling, and the like on the inner peripheral surface portion of the metal pipe 2. The brush working unit 6 can be reciprocated in the axial direction.

  When the brush working unit 6 is rotated at a high speed of, for example, about 8000 rpm, the brush bristle bundle 3 of the brush working unit 6 is centrifugally moved as shown in FIGS. 2 (A) and 2 (B). It can be expanded in the radial direction. At this time, each bristle 3a of the bristle bundle 3 spreads radially from the end surface position of the connecting portion with the resin pipe 4. Thereby, the protruding end part of each bristle 3a of the protruding part 9 of the bristle bundle 3 is elastically deformed so as to be in line contact with the inner peripheral surface part 2a of the pipe 2. Therefore, the brush bristles 3 a can be brought into contact with a wide range in the axial direction of the inner peripheral surface portion 2 a of the metal pipe 2. Thereby, it is possible to easily perform brushing processing such as polishing, grinding, deburring, rust removal, paint peeling, etc., on the inner peripheral surface portion 2a of the metal pipe 2.

(effect)
Therefore, the polishing brush 1 having the above configuration has the following effects. That is, in the polishing brush 1 of the present embodiment, a brush bristle bundle 3 in which a plurality of brush bristles 3a made of resin filaments containing abrasive grains are bundled is provided, and the brush 9 is projected by the protruding portion 9 that protrudes from the end of the resin pipe 4. A working unit 6 is formed. The brush bristles 3a can be brought into contact with the entire inner peripheral surface 2a of the metal pipe 2 by rotating the brush working unit 6 at a high speed of about 8000 rpm, for example. Thereby, it is possible to easily perform brushing processing such as polishing, grinding, deburring, rust removal, paint peeling, etc. on the inner peripheral surface portion 2a of the metal pipe 2.

  In this embodiment, the bristle bundle 3 is accommodated in the resin pipe 4. For this reason, when the brush working unit 6 is rotated, the high-toughness resin pipe 4 is used instead of a metal to prevent the bristles 3 other than the brush working unit 6 from swinging. It can prevent hurting other parts.

  Further, in the present embodiment, by using the polishing brush 1 in which the outer diameter of the brush working unit 6 is smaller than the inner diameter of the metal pipe 2, the operation of inserting the polishing brush 1 into the metal pipe 2 is simplified. Can be done. Furthermore, the brush bristle bundle 3 of the brush working unit 6 can be expanded in the radial direction of the pipe 2 by centrifugal force by rotating the brush working unit 6 at a high speed of about 8000 rpm, for example. Thereby, the side surface portion of the protruding portion 9 of the bristle bundle 3 on the protruding end portion side of each bristle 3a is elastically deformed so as to be in line contact with the inner peripheral surface portion 2a of the pipe 2. At this time, a wide range of the inner peripheral surface portion 2a of the pipe 2 can be brushed by the side surface portion of each brush bristle 3a that is elastically deformed so as to be in line contact with the inner peripheral surface portion 2a of the pipe 2, and the work efficiency of the brushing processing Can be increased.

  Further, by increasing the brush rotation speed of the brush working unit 6, the brush bristle bundle 3 of the brush working unit 6 spreads radially by centrifugal force, and the pipe 2 having a large inner diameter can be processed. At this time, since the tip of the brush working part 6 greatly expands in proportion to the length of the brush working part 6, one polishing brush 1 can be adapted to a large number of inner diameter pipes 2 and is economical. Is greatly improved.

  Further, the resin pipe 4 can be cut in accordance with the protruding amount of the brush working unit 6 protruding from the resin pipe 4. Thereby, the protrusion amount of the brush working part 6 protruding from the resin pipe 4 can be arbitrarily adjusted. When the amount of protrusion of the brush working unit 6 is reduced due to wear of the brush working unit 6, the tip of the resin pipe 4 is cut to reduce the amount of protrusion of the brush working unit 6 to wear of the brush working unit 6. You can easily return to the original length before. Thereby, the length of the required brush working part 6 can be ensured, and a service life can be extended.

  Further, as shown in FIGS. 2A and 2B, when the lateral hole 10 is opened from the outside on the side surface of the metal pipe 2 as a workpiece, the edge of the opening of the lateral hole 10 of the metal pipe 2 is surely formed. A cross burr 11 protruding to the inner side of the pipe 2 is formed. The cross burr 11 protruding from the edge of the opening of the horizontal hole 10 toward the inside of the pipe 2 can also be scraped and removed by the polishing brush 1 of the present embodiment.

  Furthermore, as shown in FIG. 3, even if the brush working part 6 of the scouring brush 1 of the present embodiment is inserted from the outside of the opening of the side hole 10 on the side surface of the metal pipe 2 that is the workpiece, Good. Also in this case, as shown in FIG. 4, the brush bristles 3 a of the brush working unit 6 spread radially, so that the brush bristles 3 a of the brush working unit 6 are directly entangled with the cross burr 11 by pulling forward while rotating. The cross burr 11 can be scraped and removed. Furthermore, scraping scraps of the cross burr 11 can be removed outside the metal pipe 2 while being attached to the brush bristles 3a when the brush working unit 6 is pulled out from the opening of the lateral hole 10 after the work.

[Second Embodiment]
(Constitution)
5 and 6 show a second embodiment of the present invention. The present embodiment is a modification in which the configuration of the polishing brush 1 according to the first embodiment (see FIGS. 1 and 2) is changed as follows. In FIG. 5 and FIG. 6, the same parts as those in FIG. 1 and FIG.

  The polishing brush 21 of the present embodiment is provided with a brush working portion 22 of a second form that holds the bristles 3 bundled with a plurality of bristles 3a in a restrained state folded in a U shape. is there. As shown in FIG. 5, the brush working unit 22 of the present embodiment removes the other end of the brush bristle bundle 3 from the other end of the resin pipe 4 (the end opposite to the fixed end with the metal case 7). The protruding portion 9 is bent in a U shape.

(Function)
Next, the operation of the above configuration will be described. When the polishing brush 21 of the present embodiment is used, the brush working unit 22 is rotated at a high speed of, for example, about 8000 rpm with the polishing brush 21 inserted into the metal pipe 2 as shown in FIG. . Thereby, the brush bristle bundle 3 of the brush working part 22 can be expanded in the radial direction of the pipe 2 by centrifugal force. Therefore, the side surface portion of the protruding portion 9 of the bristle bundle 3 on the protruding end side of each brush hair 3 a is elastically deformed so as to be in line contact with the inner peripheral surface portion 2 a of the pipe 2. At this time, a wide range of the inner peripheral surface portion 2a of the pipe 2 can be brushed by the side surface portion of each brush bristle 3a that is elastically deformed so as to be in line contact with the inner peripheral surface portion 2a of the pipe 2, and the work efficiency of the brushing processing is improved. Can be increased.

(effect)
Therefore, the same effect as the polishing brush 1 of the first embodiment can be obtained with the polishing brush 21 of the present embodiment. Furthermore, in the brush working unit 22 of the second form that is held in a U-shaped restrained state as in the present embodiment, the brush bristles of the brush working unit 22 are in the side holes 10 on the side surface of the metal pipe 2 during the work. It does not jump out of the opening. Therefore, it is possible to efficiently remove the cross burr.

  The shape of the brush working unit is the same as that of the brush working unit 6 of the first embodiment that holds a plurality of brush bristles 3a in an unconstrained state that can be freely moved, like the brush 1 of the first embodiment. It is not limited to the brush working part 22 of the 2nd form which hold | maintains the bristle bundle | flux 3 in the restraint state bent in U shape like the polishing brush 21 of 2nd Embodiment. Any shape can be produced depending on the location of use.

[Third Embodiment]
(Constitution)
FIG. 7 is a longitudinal sectional view showing a schematic configuration of the entire polishing brush 31 according to the third embodiment of the present invention. In FIG. 7, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is omitted.

  The polishing brush 31 of this embodiment is formed by forming the resin pipe 4 with a soft resin pipe 32 having high flexibility. The soft resin pipe 32 is made of, for example, vinyl chloride.

(Action / Effect)
Next, the operation and effect of the polishing brush 31 having the above configuration will be described. In the polishing brush 31 of the present embodiment, since the resin pipe 4 is formed by the soft resin pipe 32 having high flexibility, the flexibility of the polishing brush 31 can be increased. Therefore, since the entire body of the polishing brush 31 can be curved, the inner peripheral surface of the curved metal pipe can be brushed.

  Therefore, the brushing process of the inner peripheral surface of the curved metal pipe, which has been conventionally performed by the etching process using a chemical, can be easily performed without performing the etching process. As a result, great economic effects such as cost reduction of the entire apparatus can be obtained.

As an example of work of this embodiment,
(1) Material (S48C) crankshaft inner diameter tolerance deburring and polishing (2) Material (FC material) camshaft inner diameter tolerance deburring and polishing (3) Material (FCD material) power steering gear case parts Internal deburring (4) Internal deburring of piston of material (ADC12), Polishing (5) Internal diameter tolerance deburring of transmission of material (ADC12), Internal deburring of polishing (6) Hydraulic valve of material (FGD450), Polishing (7) Deburring the inner diameter of the air cylinder of the material (ADC12), polishing (8) Inner diameter polishing of various metal pipes of the material (SUS, aluminum, iron).

Furthermore, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, the type of abrasive grains to be mixed with the resin material can be appropriately selectively selected according to the target portion.
Hereinafter, the invention described in the scope of claims of the present application will be appended.
[1] A brush bundling a plurality of brush bristles made of resin filaments containing abrasive grains, a resin pipe for housing the bristles, one end of the bristles and one end of the resin pipe are fixed. And a brush working part formed by a protruding part in which the other end part of the bristles is protruded from the other end part of the resin pipe.
[2] In the first mode in which the brush working unit holds the plurality of brush bristles in an unconstrained state in which the plurality of brush bristles can move freely, or in a constrained state in which the plurality of brush bristles are bent in a U shape. The polishing brush according to [1], which has one of the second forms to be held.
[3] The fixing part includes a metal case, and the metal case includes a caulking fixing part that caulks and fixes the one end part of the bristle bundle and the one end part of the resin pipe integrally. The polishing brush according to [1] or [2].
[4] The resin pipe according to any one of [1] to [3], wherein the resin pipe can be cut according to a protruding amount of the brush working portion protruding from the other end portion of the resin pipe. Brushing brush.
[5] The polishing pipe according to any one of [1] to [4], wherein the resin pipe is at least one of a hard resin pipe having high rigidity and a soft resin pipe having high flexibility. Sweeping brush.

    DESCRIPTION OF SYMBOLS 1 ... Polishing brush, 2 ... Metal pipe, 2a ... Inner peripheral surface part, 3 ... Brush hair bundle, 3a ... Brush hair, 4 ... Resin pipe, 5 ... Fixed part, 6 ... Brush working part, 7 ... Metal case, 7a ... Case body, 7b ... Bottom part, 7c ... Fixing part, 8 ... Shaft part, 9 ... Projection part, 10 ... Horizontal hole, 11 ... Burr, 21 ... Brushing brush, 22 ... Brush working part, 31 ... Brushing brush, 32 ... soft resin pipe.

Claims (5)

A polishing brush that is inserted into a pipe to be machined and brushes the inner peripheral surface of the pipe,
A bristles bundling a plurality of bristles made of resin filaments containing abrasive grains,
A resin pipe for housing the bristles,
A fixing part for fixing one end of the brush bristle bundle and one end of the resin pipe;
A brush working part formed by a projecting part projecting the other end part of the bristle bundle from the other end part of the resin pipe;
Equipped with,
In a state where the brush working part is inserted into the pipe to be processed, the brush working part is rotated in the direction around the axis and moved in the axial direction while being deformed in the direction of expanding the brush bristle bundle. A polishing brush, wherein the inner peripheral surface of the pipe is brushed.   The brush working unit holds the plurality of brush bristles in a first state that holds each of the bristles in an unconstrained state that can be freely moved, or holds the plurality of brush bristles in a constrained state that is bent in a U shape. The polishing brush according to claim 1, which has one of two forms. The fixing portion has a metal case,
3. The scouring brush according to claim 1, wherein the metal case has a caulking fixing portion that caulking and fixing the one end portion of the brush bristle bundle and the one end portion of the resin pipe integrally.   4. The polishing brush according to claim 1, wherein the resin pipe can be cut according to a protruding amount of the brush working portion protruding from the other end portion of the resin pipe. 5.   The polishing brush according to any one of claims 1 to 4, wherein the resin pipe is at least one of a hard resin pipe having a high rigidity and a soft resin pipe having a high flexibility.