TWI810203B - A backing pad arrangement for an abrading system, and the abrading system - Google Patents

Abstract

The application relates to a backing pad arrangement suitable for an abrading system. The backing pad arrangement comprises a backing pad (413, 513, 523), and an additional layer (418, 518, 528) or an abrading article (417, 527) adapted to be attached to the backing pad (413, 513, 523) with at least one fixing member (319, 419, 519, 529), which at least one fixing member (319, 419, 519, 529) may be hollow in its longitudinal direction. The application further relates to the abrading system comprising the backing pad arrangement according to the application.

Description

Backing pad equipment and grinding system for grinding system

technical field

The present application relates to a backing pad apparatus suitable for grinding systems. The present application further relates to the grinding system.

Background of the invention

Grinding is performed in a variety of situations, such as automotive repair and painting work, building construction and repair, and furniture manufacturing and repair. Typically, the abrasive article is attached to the backing pad of the abrasive system via attachment elements. In all cases, grinding produces debris which causes wear of the attachment elements. As a result, the backing pad loses its property of holding the abrasive article in place, and thus the backing pad must be replaced.

Summary of the invention

The purpose of this application is to provide a backing pad with a longer life, thereby saving costs and protecting the environment.

According to one aspect of the present application, there is provided a backing pad apparatus for a grinding system, the backing pad apparatus includes a backing pad, wherein the The lower surface of the backing pad includes at least one opening adapted to receive a securing member. The back pad apparatus further comprises an additional layer adapted to be attached to the back pad. The additional layer includes an upper surface, a lower surface, and at least one opening extending through the additional layer. The additional layer is attached to the backing pad by at least one securing member. Alternatively, the backing pad apparatus further comprises an abrasive article adapted to be attached to the backing pad. The abrasive article includes at least one opening extending through the abrasive article. The abrasive article is attached to the backing pad by at least one securing member. The at least one fixing part is hollow in its longitudinal direction.

According to another aspect of the present application, there is provided a backing pad apparatus for a grinding system, the backing pad apparatus comprising a backing pad, wherein the lower surface of the backing pad comprises two or more openings adapted to receive the fixing components. The back pad apparatus further includes an additional layer adapted to be attached to the back pad, the additional layer comprising an upper surface, a lower surface and two or more openings extending through the additional layer. The additional layer is attached to the backing pad by two or more fixing members. Alternatively, the backing pad apparatus further comprises an abrasive article adapted for attachment to the backing pad, the abrasive article comprising two or more openings extending through the abrasive article. The abrasive article is attached to the backing pad by two or more securing members.

According to yet another aspect of the present application, there is provided a grinding system comprising a grinding device, wherein the grinding system further comprises a backing pad device according to the present application.

11: Motor

12: Motor shaft

13: Bearing

14: Spindle

15: Gasket screw

16, 216, 226, 236, 246, 416, 516, 526: suction opening

17: Grinding items

18, 413, 513, 523: backing pad

211, 221, 231, 241, 411, 521: cover plate

212, 222, 232, 242, 412, 522: upper opening

213, 223, 233, 243: glass fiber board

214, 224, 234, 244: hard foam

215, 225, 235, 245: Backing Pad Hooks

217: Abrasive paper with loops

227, 237, 247: Grinding net with ring line

238: Pad protector with loop and hook

248: interface with loop, soft foam and hook

319, 419, 519, 529: fixed parts

417, 527: grinding net

418, 518, 528: extra layers

422, 532: extra opening

534: Intake pipe, inlet pipe

535: Air intake opening

The drawings are presented to illustrate the disclosed embodiments and should not be considered as limiting the scope of use of the disclosed embodiments. The drawings are not to any particular scale.

Figure 1 illustrates a cross-sectional view of a backing pad attached to a grinding device.

Figure 2a illustrates a cross-sectional partial view of a backing pad with abrasive paper.

Figure 2b illustrates a partial cross-sectional view of a backing pad with abrasive mesh.

Figure 2c illustrates a cross-sectional partial view of a backing pad with a pad protector positioned between the backing pad and the grinding wire.

Figure 2d illustrates a cross-sectional partial view of a backing pad with an interface between the backing pad and the abrasive mesh.

Figure 3 illustrates a cross-sectional view and a perspective view of a hollow securing member for use in a backing pad apparatus.

Figure 4 illustrates a cross-sectional partial view of the backing pad.

Figure 5a illustrates the backing pad seen from the underside.

Figure 5b illustrates a cross-sectional view of the backing pad.

Detailed Description of the Preferred Embodiment

The solution is described in more detail below with reference to some examples, which should not be considered limiting.

In the following description, reference is made to the drawings with the following numbers and designations: S _x and S _y denote orthogonal directions

11 motor

12 Motor shaft

13 bearings

14 spindle

15 Spacer screw

16 Suction opening

17 Abrasive Items

18 backing pad

211 Cover

212 Upper opening

213 fiberglass board

214 Hard foam

215 Backing Pad Hook

216 Suction opening

217 Abrasive paper with loops

221 Cover

222 Upper opening

223 fiberglass board

224 hard foam

225 Backing Pad Hook

226 Suction opening

227 Grinding wire with loop

231 Cover

232 Upper opening

233 fiberglass board

234 hard foam

235 Backing Pad Hook

236 Suction opening

237 Grinding wire with loop

238 Pad Protector with Loop and Hook

241 Cover

242 Upper opening

243 fiberglass board

244 hard foam

245 Backing Pad Hooks

246 Suction opening

247 Grinding wire with loop

248 interface with loop, soft foam and hook

319 fixed parts

411 Cover

412 Upper opening

413 Backing Pad

416 Suction opening

417 Grinding Mesh

418 extra layers

419 fixed parts

422 Extra opening

513 Backing Pad

516 Suction opening

518 extra layers

519 fixed parts

521 Cover

522 Upper opening

523 Backing Pad

526 Suction opening

527 Grinding Mesh

528 extra layers

529 fixed parts

532 Extra opening

534 Air intake duct, inlet duct

535 Inlet opening

A lapping device with a backing pad attached is illustrated in FIG. 1 . The grinding device comprises a pneumatic or electric drive motor 11 for rotating a motor shaft 12 . The grinding device includes a bearing 13 mounted eccentrically with respect to the motor shaft 12 at the lower end of the motor shaft 12 . The main shaft 14 is mounted to the bearing 13 . Alternatively, the bearing may be installed in an additional shaft balancer, and the motor 11 configured to rotate the shaft balancer by means of a connecting member or a gear.

A backing pad 18 is attached to the spindle 14 . Backing pad 18 may be attached to spindle 14 by pad screw 15 . With this configuration, the backing pad 18 can move in random circles. This is called oscillatory movement. The upper surface of the backing pad 18 refers to the surface configured for attachment to an abrasive device. The lower surface of the backing pad 18 refers to the opposite surface on the S _x , S _y plane.

As illustrated in Figures 2a to 2d, the upper surface of the backing pad 18 is covered Including cover plates 211, 221, 231, 241. The cover plates 211 , 221 , 231 , 241 may include upper openings 212 , 222 , 232 , 242 . The backing pad 18 may comprise fiberglass sheets 213 , 223 , 233 , 243 disposed below the cover sheets 211 , 221 , 231 , 241 . The backing pad may further comprise a layer comprising rigid foam 214, 221, 234, 244 below the fiberglass board. The lower surface of the backing pad 18 may include suction openings 216 , 226 , 236 , 246 . The suction openings 216 , 226 , 236 , 246 may be connected with the upper openings 212 , 222 , 232 , 242 . As illustrated in FIGS. 2a-2d , the upper opening 212 , 222 , 232 , 242 may be connected to more than one suction opening 216 , 226 , 236 , 246 . Thus, one upper opening 212 , 222 , 232 , 242 can be used as an outlet for debris and/or airflow from more than one suction opening 216 , 226 , 236 , 246 .

Abrasive articles 217, 227, 237, 247 may be attached to the lower surface of backing pad 18 during abrading of a workpiece with the abrading system. The abrasive articles 217, 227, 237, 247 may be attached to the backing at the lower surface of the backing pad 18 and at the upper surface of the abrasive articles 217, 227, 237, 247 via attachment elements 215, 225, 235, 245 pad 18 below the surface. The upper surface of the abrasive articles 217 , 227 , 237 , 247 is removably attached to the lower surface of the backing pad 18 . The abrasive articles 217, 227, 237, 247 may comprise abrasive particles. The abrasive articles 217, 227, 237, 247 may comprise abrasive material, such as sandpaper or a grit mesh. By grinding surface is meant a surface adapted to be in contact with the surface to be ground during grinding.

In all grinding, whether grinding discrete workpieces or larger surfaces such as walls or ceilings, abrasive debris is generated. this broken Swarf can include abrasive material from the abrasive surface and abrasive particles separated from the abrasive article. Fragments may be fine-grained. Debris remaining during grinding may adversely affect grinding efficiency and resulting surface quality, and may clog the abrasive article. Accumulated debris on the abrasive article and/or backing pad adds weight to the system components on which the debris accumulates, resulting in an unbalanced abrasive system that can compromise user control, abrasive efficiency, and surface quality.

The abrasive articles 217, 227, 237, 247 may include openings corresponding to the suction openings 216, 226, 236, 246 of the backing pad 18, or the abrasive articles 217, 227, 237, 247 may include abrasive meshes comprising open mesh hole. The open mesh allows debris and air to flow through the mesh during grinding. When attached to the backing pad 18 , the openings of the abrasive articles 217 , 227 , 237 , 247 align with the suction openings 216 , 226 , 236 , 246 of the backing pad 18 .

The abrasive articles 217, 227, 237, 247 and the backing pad 18 may have any shape in the _Sx , _Sy planes, such as rectangular, triangular or preferably circular. Preferably, backing pad 18 and abrasive articles 217, 227, 237, 247 are substantially the same shape and size. The backing pad 18 and the abrasive articles 217, 227, 237, 247 are attachable such that edge portions of the facing surfaces of the backing pad 18 and the abrasive articles 217, 227, 237, 247 are attached adjacent to each other Compatible, thereby forming a uniform outer edge portion. The backing pad 18 and abrasive articles 217, 227, 237, 247 have outer edges that are similar in shape, size and form.

The grinding system may include a debris extractor to provide suction pressure and convey debris formed during grinding operations. The grinding system may include a device for directing suction pressure from the debris extractor system onto the backing pad 18 side shell. The suction pressure can be directed as far as the grinding device above the backing pad 18 . From outside the backing pad 18 and possibly through the inlet duct 534 and the air inlet opening 535 in the backing pad 18, air can be delivered by suction pressure through the suction opening in the backing pad 18 to the debris extractor. Debris is conveyed from the underside of the backing pad 18 and abrasive articles 217, 227, 237, 247 by this air flow.

Although most of the debris is conveyed with the air flow caused by the suction pressure, even a small amount of remaining debris may wear the attachment elements 215, 225, 235, 245 and/or abrasive on the lower surface of the backing pad 18 The upper surface layer of the article 217,227,237,247. In the event that the attachment elements 215, 225, 235, 245 wear, the lower surface of the backing pad 18 and/or the upper surface layer of the abrasive articles 217, 227, 237, 247 lose their ability to retain the abrasive articles 217, 227, 237, 247 is attached to the property of the backing pad 18.

For smaller backing pads 18 , additional layers 238 , 248 comprising attachment elements may be used between the backing pad 18 and the abrasive articles 217 , 227 , 237 , 247 . The use of additional layers 238 , 248 may provide cost savings and longer life of the backing pad 18 . When the attachment elements of the additional layers 238, 248 wear out, the additional layers 238, 248 will be replaced instead of the backing pad 18.

The additional layer 238, 248 comprises an upper surface which refers to the surface of the S _x , S _y plane configured to attach against the backing pad, and a lower surface which refers to the additional layer 238 , 248 in the S _x , S _{y plane} . Opposite surfaces on a plane. Additional layers 238, 248 may be pad protectors or interfaces. The pad protector includes an upper surface and a lower surface. The pad protector upper and lower surfaces may include attachment elements. The interface includes an upper surface, a lower surface and an intermediate layer. The upper and lower surfaces of the interface may include attachment elements.

However, the additional layers 238, 248 as described above may not prolong the life of the backing pad when larger backing pads are used. With larger backing pads, when using weak debris extractors, the airflow is insufficient to keep the area clean. Debris collects in the attachment elements between the backing pad and the additional layers 238, 248 and may even shorten the life of the attachment elements of the backing pad.

Larger backing pads refer to backing pads comprising a diameter greater than 150 mm. For backing pads having a shape other than circular, such as rectangular, triangular, elliptical or other polygonal, in the S _x , _Sy plane, the diameter refers to the longest possible distance between the edges of the backing pad.

For larger backing pads, a solution according to an embodiment is provided. According to an embodiment, the backing pad 413, 523 comprises an additional layer 418, 518, 528, which is attached to the backing pad 413, 523 by at least one fixing member 319, 419, 519, 529, as shown in Fig. 3, Fig. 4 , Figure 5a and Figure 5b illustrate.

The fixing members 319, 419, 519, 529 may be a type of screw. The fixing members 319, 419, 519, 529 may comprise threads. The fixing member 319, 419, 519, 529 may comprise a stud portion. Alternatively, the securing means may be of the snap hook type or of the expandable type, for example. The fixing components 319, 419, 519, 529 may include plastic and/or metal. Advantageously, the fixing parts 319, 419, 519, 529 comprise plastic. The fixing part 319, 419, 519, 529 may be hollow in its longitudinal direction. The longitudinal direction refers to the direction in which the securing member 319, 419, 519, 529 is configured to pass through the backing pad 413, 523 and the additional layer 418, 518, 528, which is perpendicular to the backing pad 413, 523 and the additional layer 418, 518 , 528 surface. Through backing pads 413, 523 The fixing means 319 , 419 , 519 , 529 and the additional layers 418 , 518 , 528 are configured to enable attachment of the backing pad 413 , 523 and the additional layers 418 , 518 , 528 . The hollow fixed members 319, 419, 519, 529 allow air to flow through.

The additional layer 418, 518, 528 comprises an upper surface which refers to the surface on the S _x , S _y plane configured to attach against the backing pad 413, 523, and a lower surface which refers to the additional layer 418, 518, The opposite surface of 528 on the S _x , S _y plane. Additional layers 418, 518, 528 may be pad protectors or interfaces. The pad protector includes an upper surface and a lower surface. The interface includes an upper surface, a lower surface and an intermediate layer.

The upper surface of the additional layer 418, 518, 528 may comprise fabric, film, plastic sheeting and/or attachment elements such as loops.

The lower surface of the additional layer 418 , 518 , 528 may include attachment elements for attaching the additional layer 418 , 518 , 528 to the abrasive article 417 , 527 . Such attachment elements may enable mechanical or adhesive attachment. Advantageously, such attachment enables removal and reattachment. Attachment elements may include hook and loop type fasteners with the ability to facilitate reattachment. In one embodiment, the lower surface layer of the additional layer 418, 518, 528 includes hooks. In another embodiment, the lower surface layer of the additional layer 418, 518, 528 includes loop wires.

The lower surface of the additional layer 418, 518, 528 may contain abrasive particles. Abrasive particles may be attached to the lower surface of the additional layer 418, 518, 528 via an adhesive.

The middle layer of the additional layers 418, 518, 528 may comprise a cushioning pad. The middle layer may comprise a soft material such as foam. Additional layers 418, 518, The soft intermediate layer of 528 enables the additional layers 418, 518, 528 to conform to the contours of the surface when lapped.

The cover plates 411 , 521 of the backing pads 413 , 523 include openings. The cover plate 411 , 521 of the backing pad 413 , 523 may include an upper opening 412 , 522 and an additional opening 422 , 532 . The upper openings 412 , 522 are technically similar to the additional openings 422 , 532 . The term upper opening 412, 522 refers to an opening that can be aligned with the suction opening 416, 516, 526 of the additional layer 418, 518, 528 comprising the fixing means 319, 419, 519, 529 fixed thereto. The term additional opening 422, 532 refers to an opening that can be aligned with the suction opening 416, 516, 526 of the additional layer 418, 518, 528 that does not include the fixing means 319, 419, 519, 529 fixed thereto.

The additional layer 418 , 518 , 528 contains suction openings 416 , 516 , 526 . Suction openings 416 , 516 , 526 may extend through additional layers 418 , 518 , 528 . The suction openings 416, 516, 526 extending through the additional layer 418, 518, 528 may be configured such that when attached to the backing pad 413, 523, the suction openings 416, 516, 526 are in contact with the upper openings 412, 522 and the additional openings 422, 532 comprised by the cover plates 411, 521 are aligned. The suction openings 416 , 516 , 526 can be connected with the upper openings 412 , 522 and/or with the additional openings 422 , 532 of the cover plate 411 , 521 . Via the thus formed continuously extending suction duct, chips formed during grinding work can be transported together with the air flow induced by the suction pressure provided by the chip extractor. The upper opening 412 , 522 may be connected to more than one suction opening 416 , 516 , 526 . Thus, one upper opening 412 , 522 or one additional opening 422 , 532 can be used as an outlet for debris and/or airflow from more than one suction opening 416 , 516 , 526 . fragments The extractor system is configured to direct debris away from the additional layers 418 , 518 , 528 and the abrasive surfaces of the abrasive articles 417 , 527 .

According to an embodiment, the additional layer 418 , 518 , 528 is attached to the backing pad 413 , 523 by means of at least one fixing member 319 , 419 , 519 , 529 . At least one fixing part 319, 419, 519, 529 is hollow in its longitudinal direction. The securing features 319, 419, 519, 529 configured through the openings of the backing pad and additional layers or abrasive articles may form boundaries at the circumference of the openings. Thus, due to the securing members 319, 419, 519, 529, the openings may have a smaller area and/or volume but still allow air and/or debris to flow through.

According to an embodiment, the additional layer 418 , 518 , 528 is attached to the backing pad 413 , 523 by means of a plurality of fixing members 319 , 419 , 519 , 529 . The fixing members 419, 519, 529 may be arranged in a symmetrical or asymmetrical manner. The fixing means 319 , 419 , 519 , 529 can be fixed to the suction openings 416 , 516 , 526 of the additional layer 418 , 518 , 528 . The fixing part may be fixed to be aligned with the upper opening 412 , 522 of the cover plate 411 , 521 . The suction openings 416 , 516 , 526 of the additional layer 418 , 518 , 528 are connected with the upper opening 412 , 522 and the additional opening 422 , 532 of the cover plate 411 , 521 of the backing pad 413 , 523 . The hollow stationary members 319, 419, 519, 529 allow debris to be conveyed through the stationary members along with the air. Debris can also be transported via the suction ducts formed by the suction openings 416 , 516 , 526 of the additional layer 418 , 518 , 528 and the additional openings 422 , 532 of the cover plates 411 , 521 of the backing pad 413 , 523 .

The air intake duct 534 of the backing pad 523 is configured to direct air to the abrasive surface of the abrasive article 527 through the air intake opening 535 . this increase The air flow from the abrasive surface of the abrasive article 527 to the suction opening 526 is reduced.

According to another embodiment, the additional layer can be attached to the backing pad by means of a fixing member arranged in the center of the backing pad. The center of the backing pad refers to the center point of the backing pad in the S _x , S _y plane. The fixing part is hollow in its longitudinal direction. Hollow fixed parts allow air to flow through. The hollow stationary member allows debris to be conveyed through the stationary member. The debris can also be transported via the suction duct formed by the suction openings of the additional layer and the additional openings of the cover plate of the backing pad.

According to an aspect of the present application, there is provided a backing pad apparatus for a grinding system, the backing pad apparatus includes a backing pad, wherein the lower surface of the backing pad includes at least one opening, the at least one opening Adapted to receive a fixed component. The back pad apparatus further comprises an additional layer adapted to be attached to the back pad. The additional layer includes an upper surface, a lower surface, and at least one opening extending through the additional layer. The additional layer is attached to the backing pad by at least one securing member. Alternatively, the backing pad apparatus further comprises an abrasive article adapted to be attached to the backing pad. The abrasive article includes at least one opening extending through the abrasive article. The abrasive article is attached to the backing pad by at least one securing member. The at least one fixing part is hollow in its longitudinal direction. The additional layer or the abrasive article may be attached to the backing pad by two or more securing members. The additional layer or the abrasive article can be attached to the backing pad by a securing member disposed in the center of the backing pad. The fixing part can be screw type, clasp type or expansion type. The backing pad may include at least one air intake duct for directing air to the abrasive surface. This additional layer can contain A soft intermediate layer is located between the upper surface and the lower surface of the additional layer. The lower surface of the additional layer may contain abrasive particles. The backing pad may include at least one additional opening not adapted to receive a securing member.

According to another aspect of the present application, there is provided a backing pad apparatus for a grinding system, the backing pad apparatus comprising a backing pad, wherein the lower surface of the backing pad comprises two or more openings adapted to receive the fixing components. The back pad apparatus further includes an additional layer adapted to be attached to the back pad, the additional layer comprising an upper surface, a lower surface and two or more openings extending through the additional layer. The additional layer is attached to the backing pad by two or more fixing members. Alternatively, the backing pad apparatus further comprises an abrasive article adapted for attachment to the backing pad, the abrasive article comprising two or more openings extending through the abrasive article. The abrasive article is attached to the backing pad by two or more securing members. These fixing parts can be screw type, clasp type or expansion type. The fixing members may be non-hollow. The backing pad may include at least one air intake duct for directing air to an abrasive surface. The additional layer may comprise a soft intermediate layer between the upper surface and the lower surface of the additional layer. The lower surface of the additional layer may contain abrasive particles. The backing pad may include at least one additional opening not adapted to receive a securing member.

According to yet another aspect of the present application, there is provided a grinding system comprising a grinding device, wherein the grinding system further comprises a backing pad device according to the present application. The grinding system may include a debris extractor system adapted to provide suction pressure and remove debris formed during grinding operations. The debris extractor system can be configured to Debris is directed away from the additional layer and the abrasive surface. The debris extractor system may be adapted to direct debris through at least one of: the additional layer, the abrasive article, the backing pad, the securing member(s), the opening of the additional layer, the abrasive article The opening of the back pad, the opening of a cover plate of the backing pad. The opening of the additional layer or the abrasive article and the opening of the cover plate of the backing pad can be connected to form a channel for removing debris.

The lifespan of the back pad apparatus according to one embodiment was tested and compared to a back pad apparatus having an additional layer attached thereto via a hook and loop type connection element. The average lifetime of the latter backing device was shown to be between 12 and 17 hours, depending on the material of the attachment elements. The lifetime of the extra layer was shown to be between 35 and 42 hours for the backing device according to the embodiments. Furthermore, after this time the backing pad did not appear to wear out and could be used again by replacing the extra layer with a new one.

The above presents a cost-effective and eco-efficient liner for grinding systems. It is more cost-effective to replace the extra layer rather than the entire backing pad. Extended backing pad life reduces backing pad waste and thus protects the environment.

Many variations of the present application will be apparent to those skilled in the art from the foregoing description. Such apparent variations are within the full contemplation of the appended claims.

521: cover plate

522: Upper opening

523: back pad

526: suction opening

527: Grinding net

528: extra layer

529: fixed parts

532: extra opening

534: Intake pipe, inlet pipe

535: Air intake opening

Claims (10)

A backing pad apparatus for an abrasive system, the backing pad apparatus comprising a backing pad (413, 513, 523), wherein a lower surface of the backing pad (413, 513, 523) includes at least one opening adapted to receive A stationary part (319, 419, 519, 529), wherein the backing pad comprises an air inlet duct (534) and an air inlet opening (535) for directing air to an abrasive surface, and the backing pad apparatus further comprises: adapted an additional layer (418, 518, 528) attached to the backing pad (413, 513, 523), the additional layer (418, 518, 528) comprising an upper surface, a lower surface and at least one opening (416, 516, 526) extending through the additional layer (418, 518, 528), and the additional layer is attached to the backing pad (413, 513, 523) by at least one securing member (319, 419, 519, 529), and an abrasive article (417, 527) adapted to be attached to the additional layer (418, 518, 528), wherein the at least one securing member The part (319, 419, 519, 529) is hollow in its longitudinal direction to transport debris by air through the at least one fixing part (319, 419, 519, 529) and wherein the fixing part (319, 419, 519, 529) is screw type, clasp type or expansion type. The backing pad apparatus of claim 1, wherein the additional layer (418, 518, 528) is attached to the backing pad (413, 513, 523) by two or more fixing members (319, 419, 519, 529). The backing pad device of claim 1, wherein the additional layer (418,518,528) is disposed on the backing pad (413,513,523) A fixing member (319, 419, 519, 529) in the center is attached to the backing pad (413, 513, 523). The backing apparatus of claim 1, wherein the additional layer (418, 518, 528) comprises an intermediate layer between the upper surface and the lower surface of the additional layer (418, 518, 528). The backing pad apparatus of claim 1, wherein the backing pad (413,513,523) comprises the at least one opening (416,516,526) of the additional layer (418,518,528) and a cover (411,521) of the backing pad (413,513,523) An additional opening (422, 532) forms a suction duct. A grinding system comprising a grinding device, wherein the grinding system further comprises a backing pad device according to any one of claims 1-5. The grinding system of claim 6, wherein the grinding system comprises a debris extractor system adapted to provide suction pressure and remove debris formed during the grinding operation. The grinding system of claim 7, wherein the debris extractor system is configured to direct debris away from the additional layer (418, 518, 528) and the grinding surface. The grinding system of claim 7, wherein the debris extractor system is adapted to direct debris through at least one of: the additional layer (418,518,528), the abrasive article (417,527), the backing pad (413,513,523 ), The fixing part or parts (319, 419, 519, 529), the opening of the additional layer (418, 518, 528), the opening of the abrasive article (417, 527), the opening (412, 522, 422, 532) of the cover (411, 521) of the backing pad (413, 513, 523). The grinding system of claim 6, wherein the opening (416,516,526) of the additional layer (418,518,528) or the opening (417,527) of the grinding article (417,527) is connected with the opening (412,522,422,532) of the cover (411,521) of the backing pad (413,513,523) Connect to form a conduit for debris removal.