SE545824C2 - A grinding apparatus with a vertical adjustment device for grinding a concrete surface and a method for operating the same - Google Patents

A grinding apparatus with a vertical adjustment device for grinding a concrete surface and a method for operating the same

Info

Publication number
SE545824C2
SE545824C2 SE2150898A SE2150898A SE545824C2 SE 545824 C2 SE545824 C2 SE 545824C2 SE 2150898 A SE2150898 A SE 2150898A SE 2150898 A SE2150898 A SE 2150898A SE 545824 C2 SE545824 C2 SE 545824C2
Authority
SE
Sweden
Prior art keywords
grinding apparatus
grinding
rotating means
base unit
pad
Prior art date
Application number
SE2150898A
Other languages
Swedish (sv)
Other versions
SE2150898A1 (en
Inventor
Arild Viken
Original Assignee
Arilds Betongslipning Ab
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 Arilds Betongslipning Ab filed Critical Arilds Betongslipning Ab
Priority to SE2150898A priority Critical patent/SE545824C2/en
Priority to PCT/SE2022/050688 priority patent/WO2023282832A1/en
Publication of SE2150898A1 publication Critical patent/SE2150898A1/en
Publication of SE545824C2 publication Critical patent/SE545824C2/en

Links

Classifications

    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/20—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by planing, e.g. channelling by means of planing tools
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
    • 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
    • B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Road Repair (AREA)

Abstract

The present disclosure relates to a grinding apparatus (1) for grinding a concrete surface comprising a base unit (2) comprising a chassi (3) and at least one rotating means (4) at least partially enclosed by said chassi (3). The at least one rotating means (4) is arranged to drive at least one grinding pad (5) for engaging with said surface. Further, the grinding apparatus (1) comprises a at least one motor (7) driving said rotating means (4). Moreover, the grinding apparatus (1) comprises at least one level measuring means (8) arranged to determine if at least a first and a second surface-facing portion (9, 9') of said grinding apparatus (1) has vertical level differences from said surface relative to each other, wherein said grinding apparatus (1) further comprises at least one vertical adjustment device (10) configured to vertically (y1) adjust a portion of said grinding apparatus (1) to, if said vertical level differences exceeds a pre-determined threshold, compensate said level differences.

Description

TECHNICAL FIELD The present disclosure relates to a grinding apparatus for grinding and/or polishing concrete surface. BACKGROUND ART Grinded concrete has seen a major growth over the recent years and is a result of taking what is a traditional building product (i.e. concrete flooring) and manipulating it into an attractive floor finish. lt provides a wide spectrum of varying colo_=\_._s_r choices and surface finishes. Grinding and polishing concrete (also referred to herein as grinding concrete) is generally a truly mechanical process.
Conventionally, the grinding apparatuses has grinding pads comprising ahrasive elements. These abrasix/e elements are preferabiy diamond pads and are rotatecl during the grinding steps, eg., at rotating speecls in the range of about 500 to SUG rpm. Typicaliy, the tool pads are enclosed by a chassi that is in proxintity to the floor and surrounds the rotating pads.
For large floor surfaces the task of grinding surfaces can be quite laborious using conventional grinding apparatuses. The burden may be eased by using a plurality of grinding apparatuses to reduce the time taken to carry out the task, however this requires a plurality of operators making the process more costly. A way to ease such a situation is to use a larger grinding apparatus.
However, a problem that grinding apparatuses, and especially larger grinding apparatuses face is that the floors that are to be grinded usually have level variations - especially close to the walls. This may cause problems in the grinding process since the variations in levels may result in that a portion of the grinding apparatus scrapes and damages the surface to be treated. As previously mentioned, this is specifically common ifthe grinding apparatus is a large grinding apparatus.
Thus, there is room for grinding apparatuses in the present art to explore the domain of providing improved grinding apparatuses that generally are more flexible and efficient than 2 what is currently known. Specifically, it would be desirable to provide grinding apparatuses that are flexible and that can handle floor-level variations efficiently.
Even though some currently known solutions work well in some situations it would be desirable to provide a grinding apparatus that specifically fulfils requirements relating to efficiency and flexibility. SUMMARY lt is therefore an object of the present disclosure to provide a grinding apparatus to mitigate, alleviate or eliminate one or more of the above-identified deficiencies and disadvantages.
This object is achieved by means of the grinding apparatus as defined in the appended claims. The present disclosure is at least partly based on the insight that by providing a grinding apparatus that is more flexible and efficient, the grinding apparatuses will be improved in terms of having a better performance, being faster in operation and less damaging to a surface that is treated.
The present disclosure provides a grinding apparatus for grinding a concrete surface. The grinding apparatus comprising a base unit comprising a chassi,rotating means at least partially enclosed by said chassi, wherein said rotating means f” surface, at least one motor driving said rotating means, at least one level measuring means arranged to determine if at least a first and a second surface-facing portion of said grinding apparatus has vertical level differences from said surface relative to each other, wherein said grinding apparatus further comprises a vertical adjustment device configured to vertically automatically adjust (in other words, adjust along a vertical axis) a portion of said grinding apparatus to, if said vertical level differences exceeds a pre-determined threshold, v. compensate said level differences.
The threshold may be a vertical level difference of 1-10mm. \ " :f vertical adjustment device may upon receiving control signals from said level measuring means, automatically adjust a portion of said grinding apparatus. Thus, the adjustment device allows for automatic adjustment.
A benefit with the grinding apparatus is that it allows for surface variations on a floor to be treated to be overcome efficiently, thus preventing damages on the surface to be treated and allowing for a more efficient grinding process. ~ "n _ïïi3§he wheel arrangement allow for a convenient manner to adjust the grinding apparatus while maintaining its mobility while operating.
The said first pair of wheels may be positioned at a side portion of said base unit forming a row in an operating direction of said grinding apparatus. Allowing for the grinding apparatus to vertically adjust its height from the side. This is specifically beneficial since conventionally surface variations occur close to walls. Thus, by adjusting the side of the grinding apparatus, the grinding apparatus can grind the wall in its operating direction and be automatically adjusted during the way.
The wheel arrangement may further comprise a second pair of wheels positioned at an opposing side portion of said base unit. ln other words, the grinding apparatus may have two pairs of wheels so to allow it to be adjusted from a plurality of directions, giving it higher flexibility to solve surface variations on a floor that is treated. 4 The measuring means may comprise a gyroscope instrument e.g. a laser gyroscope instrument, or a spirit level The base unit may comprise a handle rotatably attached to said base unit, wherein said handle is rotatable of at least 180 degrees around an attachment axis. Thus, the handle may allow the base unit to be put into a transporting position and an inspection position.
Each of said rotating means comprises a tension roller arrangement attached to said spindle axle, each tension roller arrangement comprising a first and a second pad attachment axle, wherein each first and second pad attachment axle are offset relative said central axis of said base unit. A benefit of this is that it allows for the two grinding pads to operate on a larger surface.
Further, in some embodiments the first and second grinding pad may be attached to each of said rotating means, wherein each first and second grinding pad partially overlap said central axis.
Further, an extension axis between each first and second pad attachment axle may form an angle with said central axis, wherein said angle is greater than 90 degrees.
A benefit ofthis is that the grinding pads are allowed be more efficient and flexible, by being offset relative said central axis they are allowed to operate on a wider surface. Further, by having an angle ofgreater than 90 degrees between the extension axis and the central axis allows the grinding apparatus to operate broader than conventionally, but not to broad, compared to e.g. if they were to form a vertical row.The grinding apparatus may comprise a control unit configured to independently adjust the motor speed of each ofthe at least one motors. Thus, allowing for more flexibility in a grinding process since each motor may operate at a differing speed, and/or be changed dynamically to a different speed. The control unit may also be configured to independently adjust the rotating direction of each of the rotating means. Thus, allowing e.g. a rotating means to rotate in an opposing direction compared to another rotating means of the plurality of rotating meanS.
The spindle axle may be configured to move said tension roller arrangement to rotate each grinding pad around each corresponding pad attachment axle. Thus, the spindle axle may facilitate rotation around each pad attachment axle allowing for a more efficient grinding pFOCeSS.
There is also disclosed a method of operating the grinding apparatus in accordance with any of the embodiments herein, the method comprising the steps of: Determining if said at least a first and a second surface-facing portion of said grinding apparatus has vertical level differences from said surface relative to each other. Further, compensating said vertical level differences, if said vertical level differences exceeds a pre-determined threshold.
According to some aspects of the present disclosure, there is provided a grinding apparatus for grinding a concrete surface comprising a base unit comprising a chassi, a plurality of rotating means at least partially enclosed by said chassi, wherein said plurality of rotating means are arranged to drive at least one grinding pad for engaging with said surface. Further, the grinding apparatus comprises a plurality of motors driving each rotating means, wherein said plurality of rotating means are arranged on a common row along a central axis in an operating direction of said grinding apparatus, wherein each rotating means is attachable to a first and a second grinding pad, wherein each rotating means comprises a spindle axle driven by said motor.
Thus the grinding apparatus according to the present aspect is arranged so to have a plurality of rotating means, each having its corresponding motor, wherein each rotating means drives 'EO Each of said rotating means may comprise a tension roller arrangement attached to said spindle axle, each tension roller arrangement comprising a first and a second pad attachment 6 axle, wherein each first and second pad attachment axle are offset relative said central axis of said base unit.
Further, an extension axis between a first and a second pad attachment axle may form an angle with said central axis, wherein said angle is greater than 90 degrees.
Moreover, the grinding apparatus may comprise a control unit configured to independently adjust the motor speed of each motor.
Further, said grinding apparatus may comprise a control unit configured to independently adjust the rotating direction of each of the rotating means.
Furthermore, said spindle axle may be is configured to move said tension roller arrangement to rotate each grinding pad around each corresponding pad attachment axle. lt should be noted that benefits and features of the present disclosure may be interchanged between the different aspects of the disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS ln the following the disclosure will be described in a non-limiting way and in more detail with reference to exemplary embodiments illustrated in the enclosed drawings, in which: Figure 1A illustrates from a side view a grinding apparatus in accordance with an embodiment of the present disclosure; Figure 1B illustrates from an objective view a part of a grinding apparatus in accordance with an embodiment ofthe present disclosure; Figure 2 illustrates from an objective view a grinding apparatus operating on a floor in accordance with an embodiment of the present disclosure; Figure 3 illustrates from an objective view a grinding apparatus in accordance with an embodiment of the present disclosure; Figure 4 illustrates from a back view a grinding apparatus operating on a floor in accordance with an embodiment of the present disclosure;Figure 5A illustrates from a top cross-sectional view a grinding apparatus in accordance with an embodiment ofthe present disclosure; Figure 5B illustrates a tension roller arrangement from an objective view; Figure 6A-6B illustrate a part of a grinding apparatus from an objective view in accordance with an embodiment ofthe present disclosure; Figure 7 illustrates a method for operating a grinding apparatus in accordance with an embodiment of the present disclosure; Figure 8A illustrates from a side view a grinding apparatus in accordance with an embodiment of the present disclosure; Figure 8B illustrates from a top cross-sectional view a grinding apparatus in accordance with an embodiment of the present disclosure; DETAILED DESCRIPTION ln the following detailed description, some embodiments of the present disclosure will be described. However, it is to be understood that features of the different embodiments are exchangeable between the embodiments and may be combined in different ways, unless anything else is specifically indicated. Even though in the following description, numerous specific details are set forth to provide a more thorough understanding of the provided apparatus, it will be apparent to one skilled in the art that the apparatus may be realized without these details. ln other instances, well known constructions or functions are not described in detail, so as not to obscure the present disclosure.
Figure 1A illustrates from a side view, a grinding apparatus 1 for grinding a concrete surface. The apparatus 1 comprising a base unit 2 comprising a chassi 3. Further, the apparatus 1 comprises at least one rotating means 4 at least partially enclosed by said chassi 3, wherein said at least one rotating means 4 is arranged to drive at least one grinding pad 5 for engaging with said surface. Further, the grinding apparatus 1 comprises at least one motor 7 driving said rotating means 4. Further, the grinding apparatus 1 comprises at least one level measuring means 8 arranged to determine if at least a first and a second surface-facing portion 9, 9' 8 (shown in Figure 1B) of said grinding apparatus 1 has vertical level differences from said surface relative to each other, wherein said grinding apparatus 1 further comprises at least one vertical adjustment device 10 configured to vertically Y1 adjust a portion of said grinding apparatus 1 to, if said vertical level differences exceeds a pre-determined threshold, compensate said level differences.
The pre-determined threshold may specifically be defined by, when a vertical level difference may damage the surface that is to be grinded upon. The pre-determined threshold may be in a range of 1-10mm (e.g. if level differences between two portions exceed a value in the range the adjustment device 10 may compensate), the threshold may also be expressed in an angle or any other suitable measure.
Figure 1B shows a part ofthe base unit 2 from an objective view, showing the first and the second portions 9, 9' as two points, thus the term ”portion” may be interchanged with points. Accordingly, the level measuring means 8 may compare the vertical level difference, between first portion 9, and second portion 9' from the surface (i.e. surface facing the grinding pads 5). The level measuring means 8 may be a gyroscope or a spirit level. ln other words, the level measuring means 8 may determine differences in elevation between two or more points/portions and if said vertical level differences exceeds a pre-determined threshold, the vertical adjustment device 10 may compensate said level differences to a pre-determined desired level difference, or, the level measuring means 8 determine the extent the surface is paraliei to a horizontal piane and based on the difference, vertically adjust at least a portion of the grinding apparatus 1 in order to compensate for said difference. Preferably, the level measuring means 8 is a laser gyroscope instrument, that determines level differences betvveen the first 9 and the second portionThe Figures 1A and 1B illustrate that said vertical adjustment device 10 may be coupled to a wheel arrangement 11 comprising at least a first pair ofwheels 12, wherein said vertical adjustment device 10 is configured to adjust at least one of said first pair ofwheels 12 in a vertical direction Y1 of said grinding apparatus 1. As shown in Figure 1B, each pair of wheels 12 may be coupled to a corresponding adjustment device 10 by means of a common wheel rod 12'. I\/|oreover, the adjustment device 10 may at least partially circumferentially enclose said wheel rod 12'. Further, to adjust the wheels 11, an adjustment screw 10' may be actuated (by e.g. an actuating means in said adjustment device 10) so to adjust the wheel rod 12' and 9 consequently the wheels 12. ln some embodiments, each wheel 12 is coupled to a separate adjustment device 10. By using an adjustment screw 10' coupled to the adjustment device 10 coupled to the pair of wheels 12 shown in Figure 1B, the pair of wheels 12 may be adjusted simultaneously in an efficient manner.
As shown in Figure 1A the base unit 2 may comprises a handle 14 rotatably attached to said base unit 2, wherein said handle 14 is rotatable of at least 180 degrees around an attachment axis 14'. Figure 1A further illustrate that the grinding apparatus may comprise a control unit. The control unit 20 may comprise memory may comprise, for example, one or more central processing units (CPUs), graphics processing units (GPUs) dedicated to performing calculations, and/or other processing devices. Further, the control unit 20 may comprise at least one memory device. Moreover, the grinding apparatus 1 may comprise a control unit 20 configured to independently adjust the motor speed of each of the at least one motors 7. Accordingly, each motor 7 may be individually adjusted to allow for a more flexible grinding operation.
The control unit 20 may further be configured to independently adjust the rotating direction of each ofthe rotating means 4. E.g. one rotating means 4 may rotate clockwise, and another one may rotate anti-clockwise. The control unit 20 may also be configured to control the adjustment device 10 and obtain signals from the level measuring means 8. However, the adjustment device 10 may also operate independently of the control unit Figure 2 illustrates an objective view of a grinding apparatus 1 in accordance with an embodiment ofthe present disclosure wherein the grinding apparatus 1 operates on a surface 30. As seen in Figure 2, the pair ofwheels 12 are positioned at a side portion 13 of said base unit 2 forming a row in an operating direction X1 of said grinding apparatus 1. Preferably, the pair ofwheels 12 are arranged at a side surface 19 of said base unit The grinding apparatus 1 may further comprise an additional pair of wheels 12 positioned at an opposing side portion 13' of said base unit 2 (not shown). ln such an embodiment (having 2 pair ofwheels), the grinding apparatus 1 may comprise a transporting position, wherein the adjustment device 10 may be configured to, when said grinding apparatus 1 is set to an transporting position, vertically adjust the wheel arrangement 11, so that the wheels 12 can be used to transport said grinding apparatus Referring to Figure 2, there may be surface level variations between the first and the second portions 9, 9' when performing grinding on particularly a concrete surface (this is particularly common when grinding/polishing close to walls or other types of intersecting surfaces). Accordingly, the adjustment device 10 may adjust the wheels vertically Y1 in a portion 9 so to compensate for said surface variations. Thus, e.g. preventing edges of the grinding pads (see Figure 5) to damage the concrete surface Figure 3 shows an objective view of a grinding apparatus 1, showing that it may comprise a pair ofwheels 12 at one side surface of said grinding apparatus 1. The wheels 12 may be placed inside the chassi 3 in accordance with some embodiments of the present disclosure.
Figure 4A and 4B illustrates from a side-view, the grinding apparatus 1 in accordance with some embodiments of the present disclosure. Figure 4A illustrates the grinding apparatus 1 showing that the adjustment device 10 hasn't adjusted the wheel arrangement 11 vertically Y1. Emphasized in the enlarged view with reference sign A.
Figure 4B illustrates the grinding apparatus 1 showing that the wheel arrangement 11 is vertically Y1 adjusted, seen in more detail in the enlarged view with reference sign B. Thus, Figure 4A and 4B illustrate that the vertical adjustment device 10 may adjust the wheel arrangement 11, upon determining level differences on a surface that is treated e.g. the surface shown in Figure 2. Figure 4B illustrates that the wheel arrangement 11 is adjusted so that the wheels 12 are adjusted relative a surface facing portion 9 of the grinding apparatus 1 so to compensate for surface variations. Consequently, a portion ofthe grinding apparatus 1 is adjusted.
Figure 5 illustrates the grinding apparatus 1 from a back view, showing that a surface 30 has level variations, and that the grinding apparatus 1 has adjusted a portion 9 (in other words an area of said grinding apparatus associated with said wheels) of said grinding apparatus 1 to compensate said surface variations by adjusting a pair of wheels 12 of the wheel arrangement Figure 6A illustrates a cut-out view of a top of said grinding apparatus 1, wherein said grinding apparatus 1 comprises a plurality of rotating means 4 arranged on a common row along a central axis c1 (in other words, along the operating direction x1 ofthe grinding apparatus 1) in an operating direction x1 of said grinding apparatus 1, wherein each rotating means 4 is 11 attachable to a first and a second grinding pad 15, 15' (i.e. the at least one grinding pad 5 may be a first and a second grinding pad 15, 15'), wherein each rotating means 4 comprises a spindle axle 16 (also shown in Figure 1A) driven by said motor 7 (not shown in Figure 6A).
Figure 6A further i||ustrates that each of said rotating means 4 may comprise a tension roller arrangement 17 attached to said spindle axle 16. Each tension roller arrangement 17 may comprise a first and a second pad attachment axle 18, 18'. Further, each first and second pad attachment axle 18, 18' may be offset relative said central axis c1 of said base unit.
Further, Figure 6A i||ustrates that an extension axis e1 between a first and a second pad attachment axle 18, 18' form an angle oL with said central axis c1, wherein said angle (a) is greater than 90 degrees. Furthermore, each spindle axle 16 is configured to move said tension roller arrangement 17 to rotate each grinding pad 15, 15' around each corresponding pad attachment axle 18, 18'. Accordingly, the grinding pads 15, 15' may have a fixed position about said spindle axle 16, wherein the grinding pads 15, 15' rotate about each corresponding pad attachment axle 18, 18'.
Figure 6B i||ustrates an objective view of a tension roller arrangement 17, coupled to a spindle axle 16 and wherein the arrangement 17 comprises a first and second pad attachment axle 18, 18. lt should be noted that the tension roller arrangement 17 may comprise more than a first and a second pad attachment axle 18, 18'.
Figure 7 i||ustrates an objective view of a part of the base 2 ofthe grinding apparatus 1 in accordance with embodiments of the present disclosure. Figure 7 i||ustrates the tension roller arrangement 17 attached to the grinding apparatus 1 wherein the grinding apparatus further comprises the adjustment device 10 and the wheel arrangement Figure 8 schematically i||ustrates a method 100 for operating a grinding apparatus in accordance with the present disclosure. The method 100 comprising the steps of determining 101 if said at least a first and a second surface-facing portion of said grinding apparatus has vertical level differences from said surface relative to each other. Also comprising the step of compensating 102 said vertical level differences, if said vertical level differences exceeds a pre-determined threshold.
Figures 9A and 9B i||ustrates the grinding apparatus 6 in accordance with another aspect of said grinding apparatus 1, Figure 9A discloses from a side view a grinding apparatus 1 forgrinding a Concrete surface comprising a base unit 2 comprising a chassi 3. Further dislosing a plurality of rotating means 4 at least partially enclosed by said chassi 3, wherein said plurality of rotating means 4 are arranged to drive a first and a second grinding pad 15, 15' (only showing grinding pad 5 in Fig. 9A, the first and second grinding pad 15, 15' are shown in Fig. 9B) for engaging with said surface. There is further shown a plurality of motors 7 driving each rotating means 4, wherein said plurality of rotating means 4 are arranged on a common row along a central axis cl (shown in Figure 9B) in an operating direction x1 of said grinding apparatus 1, wherein each rotating means 4 comprises a spindle axle 16 driven by said motor 7. As shown in Figure 9B the central axis cl extend in the length ofthe grinding apparatus As further illustrated in Figure 9B, each of said rotating means 4 may comprises a tension roller arrangement 17 attached to said spindle axle 16, each tension roller arrangement 17 comprising a first and a second pad attachment axle 18, 18', wherein each first and second pad attachment axle 18, 18' are offset relative said central axis c1 of said base unit Moreover, an extension axis e1(extending) between a first and a second pad attachment axle 18, 18' form an angle (a) with said central axis c1, wherein said angle (a) is greater thandegrees. Allowing for an optimal placement of said grinding pads 15, 15' relative each other.
The spindle axle 16 may be configured to move said tension roller arrangement 17 to rotate each grinding pad 15, 15' around each corresponding pad attachment axle 18, 18'. Accordingly, the grinding pads 15, 15' may have a fixed position about said spindle axle 16, wherein the grinding pads 15, 15' rotate about each corresponding pad attachment axle 18, 18'.

Claims (11)

  1. CLAIMS A grinding apparatus (1) for grinding a Concrete surface comprising: - a base unit (2) comprising a chassi (3); - a plurality of rotating means (4) at least partially enclosed by said chassi (3), wherein said plurality of rotating means (4) are arranged to drive at least one grinding pad (5) for engaging with said surface; - at least one motor (7) driving said rotating means (4); - at least one level measuring means (8) arranged to determine if at least a first and a second surface-facing portion (9, 9') of said grinding apparatus (1) has vertical level differences from said surface relative to each other, wherein said grinding apparatus (1) further comprises at least one vertical adjustment device (10) configured to vertically (Y1) adjust a portion of said grinding apparatus (1) to, if said vertical level differences exceeds a pre-determined threshold, compensate said level differences ”flfgusaid plurality of rotating means (4) are arra nged on a common row along the operating direction (xl) of said grinding apparatus (1), wherein each rotating means (4) is attachable to a first and a second grinding pad (15, 15') of the at least one grinding pads (5), wherein each rotating means (4) comprises a spindle axle (16) driven by said motor (7), wherein said vertical adjustment device (10) is coupled to a wheel arrangement (11) comprising at least a first pair ofwheels (12), wherein said vertical adjustment device (10) is configured to adjust at least said first pair of wheels (12) in a vertical direction (Y1) of said grinding apparatus (1).
  2. The grinding apparatus (1) according to claim 1, wherein said at least one pair of wheels (12) are positioned at a side portion (13) of said base unit (2) forming a row in an operating direction (X1) of said grinding apparatus (1).
  3. The grinding apparatus (1) according to claim 1 or 2, wherein said wheel arrangement (11) further comprises an additional pair of wheels (12) positioned at an opposing side portion (13') of said base unit (2).
  4. The grinding apparatus (1) according to any one of claims 1-3, wherein said level measuring means (8) comprises a gyroscope instrument.
  5. The grinding apparatus (1) according to any one of claims 1-4, wherein said base unit (2) comprises a handle (14) rotatably attached to said base unit (2), wherein said handle (14) is rotatable of at least 180 degrees around an attachment axis (14').
  6. The grinding apparatus (1) according to any one of preceding claims, wherein each of said rotating means (4) comprises a tension roller arrangement (17) attached to said spindle axle (16), each tension roller arrangement (17) comprising a first and a second pad attachment axle (18, 18'), wherein each first and second pad attachment axle (18, 18') are offset relative said central axis (cl) of said base unit (2).
  7. The grinding apparatus (1) according to claim 6, wherein an extension axis (el) between a first and a second pad attachment axle (18, 18') form an angle with said central axis (cl), wherein said angle is greater than 90 degrees.
  8. The grinding apparatus (1) according to any one ofthe claims 1-7, wherein said grinding apparatus (1) comprises a control unit (20) configured to independently adjust the motor speed of each of the at least one motors (7).
  9. The grinding apparatus (1) according to any one ofthe claims 1-8, wherein said grinding apparatus (1) comprises a control unit (20) configured to independently adjust the rotating direction of each of the rotating means (4).
  10. The grinding apparatus (1) according to claim 6, wherein said spindle axle (16) is configured to move said tension roller arrangement (17) to rotate each grinding pad (15, 15') around each corresponding pad attachment axle (18, 18'). 3
  11. 11. A method (100) for Operating the grinding apparatus in accordance with any one of the claims 1-10, the method comprising the steps of: - determining (101) if said at least a first and a second surface-facing portion of said grinding apparatus has vertical level differences from said surface relative to each other; - compensating (102) said vertical level differences, if said vertical level differences exceeds a pre-determined threshold.
SE2150898A 2021-07-07 2021-07-07 A grinding apparatus with a vertical adjustment device for grinding a concrete surface and a method for operating the same SE545824C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE2150898A SE545824C2 (en) 2021-07-07 2021-07-07 A grinding apparatus with a vertical adjustment device for grinding a concrete surface and a method for operating the same
PCT/SE2022/050688 WO2023282832A1 (en) 2021-07-07 2022-07-06 A grinding apparatus for grinding a concrete surface and method for operating the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2150898A SE545824C2 (en) 2021-07-07 2021-07-07 A grinding apparatus with a vertical adjustment device for grinding a concrete surface and a method for operating the same

Publications (2)

Publication Number Publication Date
SE2150898A1 SE2150898A1 (en) 2023-01-08
SE545824C2 true SE545824C2 (en) 2024-02-13

Family

ID=84800850

Family Applications (1)

Application Number Title Priority Date Filing Date
SE2150898A SE545824C2 (en) 2021-07-07 2021-07-07 A grinding apparatus with a vertical adjustment device for grinding a concrete surface and a method for operating the same

Country Status (2)

Country Link
SE (1) SE545824C2 (en)
WO (1) WO2023282832A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129539A (en) * 1962-12-26 1964-04-21 Nicholas L Tempero Surface sander having automatic leveling properties
US5643047A (en) * 1990-08-01 1997-07-01 Concrete Grinding Ltd. Mobile floor grinding vehicle
WO2008100211A1 (en) * 2007-02-15 2008-08-21 Htc Sweden Ab System, device and method for levelling floors
US20090117833A1 (en) * 2005-05-06 2009-05-07 Alfred Puchegger Floor sanding machine
CN105538075A (en) * 2016-02-29 2016-05-04 晋江兴翼机械有限公司 Grinding plane positioning method of grinder
US20180333823A1 (en) * 2017-05-19 2018-11-22 Karl Heesemann Maschinenfabrik Gmbh & Co. Kg Grinding machine for grinding a surface of an object

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129539A (en) * 1962-12-26 1964-04-21 Nicholas L Tempero Surface sander having automatic leveling properties
US5643047A (en) * 1990-08-01 1997-07-01 Concrete Grinding Ltd. Mobile floor grinding vehicle
US20090117833A1 (en) * 2005-05-06 2009-05-07 Alfred Puchegger Floor sanding machine
WO2008100211A1 (en) * 2007-02-15 2008-08-21 Htc Sweden Ab System, device and method for levelling floors
CN105538075A (en) * 2016-02-29 2016-05-04 晋江兴翼机械有限公司 Grinding plane positioning method of grinder
US20180333823A1 (en) * 2017-05-19 2018-11-22 Karl Heesemann Maschinenfabrik Gmbh & Co. Kg Grinding machine for grinding a surface of an object

Also Published As

Publication number Publication date
WO2023282832A1 (en) 2023-01-12
SE2150898A1 (en) 2023-01-08

Similar Documents

Publication Publication Date Title
US5514025A (en) Apparatus and method for chamfering the peripheral edge of a wafer to specular finish
KR101707252B1 (en) Method for chamfering wafer
JPH02139172A (en) Polishing tool
US6183342B1 (en) Polishing apparatus
JP2000005988A (en) Polishing device
JP2002519129A (en) Mobile surface finishing equipment
US20190240803A1 (en) Surface Treatment Apparatus
JPH08186089A (en) Polishing device
KR102464016B1 (en) roll grinder supplying level information of grinding bed
JPH0985619A (en) Surface grinding method and device therefor
SE545824C2 (en) A grinding apparatus with a vertical adjustment device for grinding a concrete surface and a method for operating the same
JP3701188B2 (en) Substrate cleaning method and apparatus
KR20180005415A (en) Edge polishing apparatus and edge polishing method
JPH04343663A (en) Cylinder grinding device
KR20110082427A (en) Chemical mechanical polishing apparatus for semiconductor device manufacturing
JP3043578B2 (en) Polishing equipment
JP2001150339A (en) Polishing device and polishing method
JP2003229396A (en) Machine and method for grinding wafer
CN107030549B (en) Floor surface processing machine
JP2002052453A (en) Wood working belt polishing device
JPH05138529A (en) Polishing device
CN220613320U (en) Ground grinding device
JP2552306B2 (en) Single side polishing machine
KR102260684B1 (en) CMP apparatus having uniformity improvement function of display substrate
JPH04296629A (en) Tire correction device