US20230232975A1 - Rotary brush assembly - Google Patents

Rotary brush assembly Download PDF

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Publication number
US20230232975A1
US20230232975A1 US18/100,585 US202318100585A US2023232975A1 US 20230232975 A1 US20230232975 A1 US 20230232975A1 US 202318100585 A US202318100585 A US 202318100585A US 2023232975 A1 US2023232975 A1 US 2023232975A1
Authority
US
United States
Prior art keywords
brush
support
band
axis
assembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US18/100,585
Other languages
English (en)
Inventor
Sander Hendrikus Johannes Hofstee
Jan Frederik Doddema
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Monti Werkzeuge GmbH
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to MONTI-WERKZEUGE GMBH reassignment MONTI-WERKZEUGE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DODDEMA, Jan Frederik, Hofstee, Sander Hendrikus Johannes
Publication of US20230232975A1 publication Critical patent/US20230232975A1/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/02—Brushes with driven brush bodies or carriers power-driven carriers
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/001—Cylindrical or annular brush bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B24B29/005—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents using brushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/001—Cylindrical or annular brush bodies
    • A46B13/006—Cylindrical or annular brush bodies formed by winding a strip tuft in a helix about the body
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/026—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups where the surface of the brush body or carrier is not in one plane, e.g. not flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
    • B24D13/10—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/30—Brushes for cleaning or polishing
    • A46B2200/3086—Brushes for polishing
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/30—Brushes for cleaning or polishing
    • A46B2200/3093—Brush with abrasive properties, e.g. wire bristles

Definitions

  • the present invention relates to a brush assembly. More particularly this invention concerns a rotary brush assembly for surface-treating a workpiece.
  • a typical rotary brush assembly comprises a support drum rotatable about an axis and an annular brush essentially consisting of a brush band and an array of radially outwardly projecting bristles connected to it and forming a bristle ring.
  • the stop engaged in the rotating bristle array is also formed as an abrasive for the bristles.
  • the two functions i.e. the stopping function and the grinding function, in accordance with a rotational direction of the ring brush and/or an adjusting position of the stop with respect to the bristle array.
  • the stop is adjustable with respect to the bristle array. The adjustment of the stop is carried out radially and/or tangentially. Eccentric adjustment of the stop is also possible.
  • the stop can be adjusted by the driven bristles.
  • the prior art has proven itself in principle with regard to the machining of the surface of the workpiece with the aid of the bristles and the roughness achieved as a result.
  • the surface of the workpiece is not uniformly provided with “craters” caused by the bristles.
  • comparable and also adjustable roughness levels as is the case with sandblasting are achieved in such a way that a subsequent coating, a welding process, etc. of the relevant surface of the workpiece is successful without any problems.
  • the roughness profile is subject to fluctuation, so it has a certain anisotropy in prior art. For many applications, however, an isotropic and uniform roughness of the surface of the treated workpiece is required.
  • the anisotropy or lack of uniformity of the roughness profile observed in the prior art can be attributed basically to the fact that the bristles are typically anchored in the brush band. Since the bristles are often also formed as U-shaped bristles, the brush band carrying the bristles in its circumferential direction is provided with bristle rows and axial spaces in between, created by the U-shape of the bristles for example. These spaces between the individual bristle rows now lead to the generated roughness profile being uneven during the striking machining of the workpiece surface. In practice, this is countered by the user moving the brush assembly or a rotary brush tool provided with it back and forth over the surface for example.
  • Another object is the provision of such an improved rotary brush assembly that overcomes the above-given disadvantages, in particular that the roughness profile generated in this manner on the surface of the workpiece processed here has increased uniformity with respect to the previous prior art.
  • Yet another object is to make it possible to increase the roughness of the workpiece surface.
  • a brush assembly comprises a support rotatable about an axis and an annular brush essentially consisting of a brush band and an array of bristles connected thereto and projecting radially therefrom.
  • the brush band and the bristle array extending on the support obliquely to a perpendicular to the axis of the support.
  • a longitudinal extension of the band and also the bristle array are connected to the support extending at an angle to the axis deviating from a perpendicular orientation with respect to the axis of the support.
  • the longitudinal extension of the brush band and the axis of the support form an acute angle of about 60° to less than 90°.
  • acute angles of about 70° to 85° are used.
  • angles of about 85° have proven to be favorable.
  • This back-and-forth movement of the bristles in a lateral view is interpreted in the context of the present application as a staggering movement. Because if one imagines the bristle array as a disk that is embedded diagonally in relation to the axis of the support, the disk of the bristle array in question performs a staggering movement in a lateral view or in a front view on the support because the rotational axis belonging to the disk in question performs a change of rotational direction of the bristle array, as explained in more detail below with reference to this embodiment. In any case, there is a staggering rotative impingement of the surface of the workpiece, which ensures a particularly uniform machining of the surface. In particular, any inhomogeneities as in prior art are expressly not observed.
  • the brush band is guided around the axis of the support in more than one turn and is connected to it.
  • the brush band encloses the support as a helix.
  • the brush band generally runs in a spiral shape about the axis of the support at a constant pitch; consequently, the spiral described by the brush band runs regularly with respect to the axis of the support. In principle of course, an irregular progression is also conceivable.
  • the support has a helical guide groove in its outer surface that holds the brush band. This is usually done in such a way that the brush band essentially engages laterally without play into the groove in question.
  • the groove is delimited by the respective groove walls. These groove walls are generally perpendicular to an outer cylindrical surface of the support. In fact, it has proven to be particularly favorable if the support including groove and groove walls is designed as a plastic molded part and in particular plastic injection-molded part.
  • the brush band is at least connected to the support at points.
  • the connection is generally established mechanically and/or adhesively.
  • the brush band is formed as a fabric tape, for example, as a polyamide fabric tape.
  • the described brush assembly can also be favorably provided with an additional stop in the rotating bristle array.
  • the roughness can be affected in a particularly favorable and positive manner, as described above.
  • such a stop can of course also be dispensed with.
  • FIG. 1 is a perspective view of the brush assembly according to the invention in a perspective view together with a rotary brush tool;
  • FIG. 2 is a detail view of the support according to the invention.
  • FIG. 3 is a side view of the support during the processing of a surface of a workpiece and the staggered rotative impingement of the relevant surface provided according to the invention.
  • FIG. 4 is a detail view showing how two bristled are anchored.
  • a rotary brush tool has a machine housing 1 and a drive 2 for a brush assembly 3 accommodated within it.
  • the brush assembly 3 has a drum support 4 rotatable about an axis A.
  • the support 4 is cylindrical and shown in detail in FIG. 2 .
  • annular brush 5 , 6 essentially consists of a flexible brush band 5 and an array 7 of bristles 6 connected to and projecting radially outwardly therefrom. Particularly in the schematic side view in accordance with FIG. 4 one can see how the individual bristles 6 are anchored in the brush band 5 .
  • the individual bristles 6 can be legs of a U-shaped strand and inserted through respective pairs of mounting holes 5 a in the brush band 5 .
  • the assembly is made in such a way that a longitudinal extension L of the brush band 5 indicated in FIGS. 2 and 3 and thus also of the bristle array 7 extends on the support 4 at a pitch n angle to its axis A, obliquely to a plane perpendicular to the axis A of the support 4 .
  • an acute pitch angle a is formed between the longitudinal extension L of the brush band 5 on the one hand and the central rotation axis A of the support 4 on the other.
  • the acute angle a in question lies within a range of about 70° to 85° and is in any case less than 90°. In most cases, the angle a in the range of about 85° is used here, which of course is only an example.
  • each bristle 6 not only impinges the relevant surface 9 of the workpiece in a point-specific manner during its rotation, but rather passes over an axially extended machining zone B on the surface 9 of the workpiece as indicated in FIG. 3 .
  • the bristles 6 are usually formed as shown in FIG. 4 from a U-shaped strand and consequently are at a slight spacing from one another, this results in the surface 9 of the workpiece in question no longer being impinged as in prior art by the individual bristles 6 practically in a straight line or on circles lying planes perpendicular to the axis A, but rather the individual machining zones B of the bristles 6 run at a small acute angle to such planes and thus overlap each other and overall provide for a particularly homogeneous roughness profile on the surface 9 of the workpiece being surface treated. This type of result and roughness profile has not yet been observed.
  • the brush band 5 is now not only guided around the support 4 in one turn, but in more than one turn around the axis A of the support 4 that it is connected to. In fact, the brush band 5 forms a helix surrounding the support 4 .
  • the design is such that the helical brush band 5 centered on the axis A of support 4 has a constant pitch, i.e. the angle a indicated in FIG. 2 between the longitudinal extension L of the brush band 5 and the axis A of the support 4 is the same along its full length. It is therefore a uniform helix of constant pitch in which the brush band 4 extends around the relevant axis A.
  • the design is made in such a way that the brush band 4 essentially engages laterally without play in a helical groove 10 formed in the support outer surface as shown in FIG. 2 .
  • the groove 10 is delimited by helical walls 11 projecting from a cylindrical outer support floor of the groove 10 .
  • the support 4 together with the groove 10 and the groove walls 11 defining the groove 10 is a plastic part and preferably a plastic injection-molded part.
  • the groove 10 and the groove walls 11 can also be printed via 3D printing. It is also conceivable to machine the groove 10 as well as the groove walls 11 , for example, by milling a cylindrical plastic part.
  • the brush band 5 is at least connected to the support 4 at at least one point.
  • the punctual connection can be established mechanically and/or by an adhesive.
  • the brush band 4 is usually a fabric tape made in particular from polyamide yarns or filaments.
  • a stop 12 positioned in the rotating bristle array 7 (only indicated in FIG. 1 ) and is mounted on a wall 13 of the rotary brush tool shown there or its machine housing 1 .
  • each individual bristle 6 or each turn of the brush band 4 on the surface 9 of the workpiece processes the axially extended machining zone B already mentioned, as shown in FIG. 3 .
  • This results is an overlap of the individual machining zones B and the fact that the surface 9 is provided with a particularly homogeneous roughness profile.
  • the individual bristles 6 are made of steel. In principle, of course, other materials such as for example plastic or combinations are also conceivable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Brushes (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Massaging Devices (AREA)
  • Transplanting Machines (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US18/100,585 2022-01-26 2023-01-24 Rotary brush assembly Pending US20230232975A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22153479.5 2022-01-26
EP22153479.5A EP4218494A1 (de) 2022-01-26 2022-01-26 Bürstenaggregat

Publications (1)

Publication Number Publication Date
US20230232975A1 true US20230232975A1 (en) 2023-07-27

Family

ID=80035136

Family Applications (1)

Application Number Title Priority Date Filing Date
US18/100,585 Pending US20230232975A1 (en) 2022-01-26 2023-01-24 Rotary brush assembly

Country Status (9)

Country Link
US (1) US20230232975A1 (de)
EP (1) EP4218494A1 (de)
JP (1) JP2023109167A (de)
KR (1) KR20230115258A (de)
CN (1) CN116491756A (de)
AU (1) AU2023200348A1 (de)
CA (1) CA3187780A1 (de)
MX (1) MX2023001135A (de)
TW (1) TW202335606A (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PT1834733E (pt) 2006-03-13 2008-11-27 Monti Werkzeuge Gmbh Grupo de escovas e processo para o acabamento de uma superfície de uma peça a ser trabalhada com auxílio do grupo de escovas
JP5459648B2 (ja) * 2008-02-13 2014-04-02 株式会社アオキスイーパー 直線状又は円盤状ブラシ材及び円筒状ブラシ並びに直線状又は円盤状ブラシ材の製造方法
DE102010046398A1 (de) 2010-09-24 2012-03-29 Monti-Werkzeuge Gmbh Bürstenaggregat

Also Published As

Publication number Publication date
TW202335606A (zh) 2023-09-16
MX2023001135A (es) 2023-07-27
KR20230115258A (ko) 2023-08-02
JP2023109167A (ja) 2023-08-07
CA3187780A1 (en) 2023-07-26
EP4218494A1 (de) 2023-08-02
CN116491756A (zh) 2023-07-28
AU2023200348A1 (en) 2023-08-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MONTI-WERKZEUGE GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HOFSTEE, SANDER HENDRIKUS JOHANNES;DODDEMA, JAN FREDERIK;REEL/FRAME:062890/0349

Effective date: 20230207