EP3487665B1 - Surface machining apparatus comprising a curved portion - Google Patents

Description

The invention relates to a surface processing device, in particular a manual grinding device or polishing device, according to the preamble of claim 1.

Such a surface processing device is, for example, in US 3,120,084 B described.

Such processing devices are known, for example, as sanding blocks. The flat processing surface allows the operator to process flat surfaces or workpieces, while the curved processing surface is ideal, for example, for grinding or polishing narrow or round parts of the workpiece. However, curved processing surfaces are generally not suitable for every type of round workpiece or trough. Furthermore, the curved processing surfaces are often very small, which significantly limits the scope of application of such sanding blocks.

It is therefore the object of the present invention to provide an improved surface processing device.

To solve the problem, a surface processing device according to the technical teaching of claim 1 is provided.

A basic idea is that several different radii of curvature and thus several differently designed geometries of the processing surfaces are available for workpiece processing. The continuous course of the curved section advantageously means that there are no protruding or stepped areas Edges prevent clean and smooth processing of the workpiece surface.

The curved section preferably has the shape of a spiral or partial spiral.

The curve part expediently has the shape of a so-called Fibonacci spiral.

However, the curved section can also have the shape of a logarithmic spiral, in particular the shape of a so-called golden spiral.

According to the invention it is provided that the curved section and the flat surface section adjoin one another at an angle at at least one transition region. The angular transition area can, for example, provide an edge with which the workpiece surface can be processed. However, the angular transition area can also be an area that is, so to speak, inactive or not intended for processing the workpiece surface, for example an area on which respective end areas or edges of an abrasive are arranged. It is particularly advantageous if the angle is in a range of, for example, 90-45°. The angular transition area can also be designed at an acute angle of, for example, 45-25°.

A large number of radii of curvature is expediently provided. The largest radius of curvature of the curvature section is, for example, at least twice, preferably three times, in particular four times as large as the smallest radius of curvature of the curvature section.

It is preferred that a curvature section of the curvature section at the at least one angular transition region has a larger radius of curvature than at least one further curvature section of the curvature section. It is particularly preferred, for example, if a largest or the largest radius of curvature of the curvature section is provided on the at least one angular transition region.

It goes without saying that an angular transition area can be provided at opposite end areas or transition areas from the flat surface part into the curved part. However, an asymmetrical configuration is also possible, for example in connection with the following embodiment.

According to the invention it is provided that the curved section merges tangentially into the flat surface section at exactly one or at least one transition region. The curvature section therefore merges tangentially or continuously into the flat surface section at one or more transition areas. A rounding or curvature of the curved section begins directly from the flat surface section.

It is advantageously provided that a radius of curvature of a curvature section merging tangentially into the flat surface section is smaller than at least one further radius of curvature of a curvature section of the curvature section, preferably all further radii of curvature of the other curvature sections of the curvature section. A particularly small radius of curvature or the smallest radius of curvature of the curvature portion is therefore provided in the tangential transition region between the flat surface portion and the curvature portion.

A respective transition region between the curved section and the flat surface section is expediently provided on a longitudinal side region of the processing body.

It is ergonomically favorable and/or in the sense of optimal workpiece processing if the curved section projects laterally next to the flat surface section, according to the invention on exactly one side of the flat surface section.

However, it is advantageous if the curved part does not protrude frontally or in its normal direction in front of the flat surface of the flat surface part, so that it is completely suitable for flat contact with the workpiece surface without the curved part being a hindrance.

For example, it is provided that no polishing agent or abrasive or no holding means for holding an abrasive or polishing agent is arranged on at least one, in particular an angular or the angular, transition region between the flat surface part and the curved part. As already indicated above, the angular transition area can be used, for example, so that an operator can particularly easily grasp the abrasive or polishing agent there, for example for an exchange. Furthermore, in some cases it is advantageous that there is no surface suitable for workpiece processing, especially in the angular transition area, which could, for example, damage the workpiece surface if the processing device is handled clumsily.

The following measure advantageously provides that the curved section and the flat surface section on opposite sides of the processing body extend essentially over its entire transverse width. This means that particularly large processing surfaces are present, namely, for example, on a top and a bottom of the processing device.

It is advantageous, for example, if the flat surface section extends over part of the cross section of the processing body and the curved section extends over all remaining areas of the cross section of the processing body. The surface processing device therefore provides, on the one hand, the flat surface area and, on the other hand, the curvature area in the other areas. Of course it would be possible also a configuration in which, for example, in addition to the flat surface section, there are side wall sections or side sections which in turn merge into the curved section. Thus, for example, a processing body that is basically cuboid but has a curved section is possible.

A preferred concept provides that the curved section adjoins opposite transverse end regions of the flat surface section. A transition to the curved section, for example the above-mentioned angular transition region and/or the above-mentioned tangential transition region, is therefore provided on both transverse end regions or side regions of the flat surface section.

It is expediently provided that the processing body is designed entirely or at least in sections as a cylinder and/or as a cone, on the lateral surface of which the curved part and the flat surface part are provided. The cylindrical design has the advantage that the processing body has a continuous shape over a longitudinal length or along a longitudinal axis, which means that large processing surfaces with the same contours over the longitudinal length or longitudinal axis are available for workpiece processing. A cone has the advantage that, for example, the radii of curvature of the curvature section are larger at one longitudinal end region of the cylinder than at the other longitudinal end region. This means that additional and narrower radii of curvature are available. It goes without saying that, for example, a conical section can be provided on a cylindrical section of the processing body.

A stepwise design of the at least partially or partially conical and/or partially or partially cylindrical processing body is also possible:
It is preferably provided that the processing body has at least one step or is designed as a step body. For example, several, for example at least two, cylindrical sections with respect to one Longitudinal axis of the processing body can be arranged next to each other. These cylindrical sections or a cylindrical section can also be followed by a conical section, for example.

It should be mentioned at this point that the processing body preferably has the outer contour or jacket contour according to the invention over its entire longitudinal length. However, it is also possible for the processing body to have the flat surface section and curvature section explained above over a section, while another section is designed, for example, cuboid or circular cylindrical or with another different circumferential geometry or geometry of processing surfaces.

An advantageous concept provides that the processing body in the area of the curved section has the profile of the top side of a wing, on the underside of which the flat surface section is arranged. The top profile therefore has a curvature that runs in an arc towards the flat surface area on one side, but is angled and flat on the opposite side.

It is preferred if a length of the processing body is greater than a transverse width and/or a transverse height of the processing body, with the curvature section and the flat surface section extending over the respective length of the processing body. The processing body therefore has an elongated shape.

It is also expedient if a transverse width of the flat surface section is greater than a height of the processing body, so that the processing body has a flat shape.

The processing body is expediently elastic. It preferably comprises a foam material or is made from it. There is also the possibility that the processing body has a relatively hard core, for example by arranging an air guide body or air guide body there, which acts as a stiffener. The elastic material and/or material consisting of foam material can be arranged on the relatively hard core, so that in any case the preferred embodiment is achieved, which looks like this. A foam material or an elastic, resilient material is preferably provided at least in the area of the at least one processing surface. The foam material preferably contains or is polyurethane foam.

The surface processing device expediently has an abrasive and/or polishing agent on the flat processing surface and/or the curved section.

A polishing agent or abrasive can be or comprise, for example, a grain size or a grain structure. The polishing agent or abrasive can also be or comprise a knitted fabric, for example an abrasive knitted fabric, or an abrasive fabric or polishing fabric.

It is possible for different abrasives or polishing agents to be arranged in different zones of the processing surface, for example the curved processing surface and the flat processing surface. For example, it is conceivable that the curved section has an abrasive and the flat surface section has a polishing agent. However, it is also possible for the curved section to have two different abrasives or polishing agents. It is also possible for the flat surface section to have not just one abrasive or polishing agent, but at least two abrasives that are different from one another, for example abrasives with different grain sizes, different grain material or the like, or at least two polishing agents that are different from one another, for example polishing fabrics of different hardness and/or density , having.

It is possible for the processing body to have an integral abrasive or polishing agent, which means that, for example, an abrasive grain, an abrasive fabric, a polishing fabric or another polishing material or the like is arranged in the area of the at least one processing surface. If the machining body is worn, it is replaced.

In the sense of favorable consumption or sustainability, the following measure is advantageous: It is expedient if holding means, for example an adhesive layer, a Velcro layer or the like, are provided on the outer circumference of the processing body or the at least one processing surface in order to hold an abrasive or polishing agent, for example a To hold a sanding sheet, an abrasive fabric or the like.

The abrasive or polishing agent, which can be detachably or firmly arranged on the processing body using the holding means, expediently has a sheet-like shape. In particular, the abrasive or polishing agent is a sanding sheet or polishing sheet.

An abrasive or polishing agent which can be detachably arranged or arranged on the processing body expediently forms a component of a system which has the processing body and the abrasive and/or the polishing agent.

It is preferred if the flat surface area and/or the curved area have an abrasive and/or polishing agent without interruption or throughout. In the case of the flat surface part and/or the curved part, it is also advantageous if it has continuous holding means, in particular a Velcro layer, for holding an abrasive or polishing agent. For example, no section is provided on the flat surface part or the curved part that does not have any abrasive or polishing agent.

In particular, transitions between sections or end regions of the polishing agent or abrasive, whether arranged integrally directly on the processing body or designed as a replaceable component, are only provided at a transition region between the flat surface part and the curved part. For example, no edge of a sanding sheet is arranged on the flat surface part or the curved part.

The concept explained is preferably used in a manual surface processing device. But it is also possible for a machine Surface processing device is designed according to the invention. For example, a drive, in particular an electric or pneumatic drive motor with a corresponding transmission gear, can be provided for driving the processing body to rotary and/or eccentric and/or hypercycloid and/or oscillating movements. For example, the drive is arranged in a machine housing on which the processing body is arranged.

It is advantageous for the manual processing device if it has, for example, a handle on which the processing body is arranged. The handle is preferably arranged on a suction connection or has a suction connection for sucking dust from the at least one processing surface.

A preferred concept provides for active dust extraction. It is advantageously provided that inflow openings for extracting dust-laden air are arranged on the at least one processing surface, which are fluidly connected via a channel arrangement to a suction connection to which a suction device can be connected. This means that dust that arises on one or more of the processing surfaces can be effectively sucked out.

Particularly preferred is the following concept in conjunction with the measure described in the paragraph above, in which it is provided that the processing device has an adjusting device for adjusting effective flow cross sections, with which inflow openings of a first processing surface part of the at least one processing surface and inflow openings of at least a second processing surface part at least one processing surface is fluidly connected to the suction connection, so that a suction effect on the first processing surface part and the at least one second processing surface part can be adjusted and / or switched off. As a result, the suction power of the suction device is not lost on unused processing surfaces or processing areas, but rather is lost there used effectively where it is needed. For example, it is possible to provide the suction only on the flat surface area or only on the curved area. Even the flat surface section and/or the curved section can be divided in relation to the suction, so that, for example, partial areas of the flat surface section or the curved section can be brought into flow connection with the suction connection using the adjusting device, while other partial areas are not sucked off or are sucked off to a lesser extent. For example, in the curved section, a suction can be set in the area of larger radii of curvature and in the area of smaller radii of curvature of the curved section.

This means, for example, that the inflow of external air onto a processing surface that is not required or is currently not in engagement or contact with the workpiece can be prevented or limited. The suction performance on the active processing area is therefore higher. Furthermore, a potentially unpleasant air flow during workpiece machining, which would flow over a machining surface that is not in engagement with the workpiece, is prevented or reduced.

The two first and at least one second processing surface parts, for example the flat surface part and the curved part and/or components of a curved part, can also have processing surface sections or processing surface parts that are angled or curved relative to one another. A first processing surface portion of the at least one processing surface and at least a second processing surface portion of the at least one processing surface can therefore be understood to mean a region of processing surfaces.

It is preferably provided that the first and the at least one second processing surface portion are arranged on mutually angled sides of an outer circumference of the processing body. Processing surfaces or processing surface parts that are angled relative to one another expediently also include or are processing surfaces in which, for example, a processing surface is a flat surface, the other processing surface runs in an arc away from the flat processing surface.

It is also possible for the first and at least one second processing surface portion to be arranged on opposite sides of the processing body.

In this context, it should only be mentioned in addition that several processing surfaces or processing surface parts can be present, for example three or four processing surfaces or processing surface parts that are angled to one another. Furthermore, mutually angled processing surfaces or processing surface parts can also be provided on opposite sides of the processing body.

It is possible for the suction power to be variably adjustable using the adjusting device, so that, for example, the suction flow that flows over the first processing surface portion to the suction port is smaller or larger than that which flows over the at least one second processing surface portion to the suction port.

It is advantageously provided that the adjusting device is designed to reduce the effective flow cross section between the suction connection and the first processing surface section in favor of increasing the effective flow cross section between the suction connection and the at least one second processing surface section.

An expedient embodiment provides that the adjusting device is designed to switch a flow connection between the suction connection and the inflow openings of the first processing surface section and the inflow openings of the at least one second processing surface section, so that either the inflow openings of the first processing surface section or the inflow openings of the at least one second processing surface section are connected connected to the suction connection. This means, for example, that the suction flow can be switched off for one processing surface while it is flows over or through the other processing surface. If several processing surfaces are provided, in particular processing surfaces provided on opposite or mutually angled sides of the processing body, it is possible, for example, to vacuum one processing surface while the other processing surfaces are, so to speak, switched off with regard to the suction flow. No suction flow then flows to the suction connection via their inflow openings.

Combinations are also easily possible, i.e. that the flow connection between the inflow openings of a first processing surface section and the suction connection is switched off or prevented using the adjusting device, while in a second processing surface section there is a full suction flow or a so to speak unhindered flow connection between the inflow openings and the suction connection and Finally, at the inflow openings of a third processing surface section, a smaller suction flow flows than the inflow openings of the second processing surface section. Thus, the suction power is maximum in the second processing area, reduced in the third processing area and not present in the first processing area. This application example is also easily possible with additional, for example more than three, processing surfaces.

It is preferably provided that the processing device has latching means and/or a locking device for latching or locking the setting device in at least one setting position and/or in all setting positions in which the suction connection is fluidly connected to only one of the processing surfaces. The suction power can therefore be switched digitally between the processing surfaces or processing surface areas, for example. The flow connection to the suction connection is always only present in one part of the processing surface or processing surface. However, latching or locking or a combination thereof is also possible in further setting positions, for example as in the above exemplary embodiment, in which, for example, not only a suction flow via the inflow openings a processing surface, but also at least partially or to a reduced extent via the inflow openings of a further processing surface.

It should be mentioned that clamping means or similar other fixing means can also be provided for fixing the adjusting device in at least one adjusting position.

It is expediently provided that the adjusting device has a manually operable adjusting element, in particular an adjusting ring or an adjusting sleeve, for adjusting the effective flow cross sections. The setting device can therefore be operated manually. However, an electric or other motor drive variant would also be readily conceivable, in which, for example, an actuator, in particular an electromagnet, a stepper motor or the like, actuates the setting device.

An advantageous concept provides that the adjusting element is motion-coupled or firmly connected to a mask body or has a mask body, the mask body being arranged between the inflow openings of the processing surface parts and the suction connection and having a passage section having at least one passage opening and at least one reducing section which has a Closing surface for closing a flow connection between the inflow openings of at least one processing surface section and the suction connection or is permeable to air with a smaller effective flow cross section than the passage section. For positioning the passage section or the at least one reducing section between the suction connection and the inflow openings of a respective processing surface section, the mask body is mounted movably, in particular rotatably, with respect to the processing body using a bearing, in particular a pivot bearing. A sliding bearing or a combination of sliding bearing and rotary bearing would also be possible without further ado. The at least one reducing section can therefore be completely closed, ie a flow connection between the processing surface section or Prevent the processing surface to which it is assigned in a respective setting position of the setting device and the suction connection. It is also possible for the at least one reducing section to reduce a flow connection between the processing surface part or processing surface to which it is currently assigned according to the respective setting position of the setting device. The flow cross section of the reducing section through which the suction flow can flow is smaller than a flow cross section of the passage section through which the suction flow can flow.

The mask body can also be referred to as a valve body or can be a valve body.

It is also advantageous if the mask body is permeable to flow only at the passage section. In this case, the mask body or valve body is closed except for the passage portion. This is advantageous, for example, in the case of a digital switchover in such a way that only a first processing surface is vacuumed.

It can also be provided that the mask body forms part of a mask arrangement, the masks of which are adjustable, in particular rotatable, relative to one another in order to adjust an effective flow cross section for the dust air between the inflow openings of a respective processing surface and the suction connection. For example, mask bodies or valve bodies can be provided which are designed like a disk and are mounted so that they can be rotated and/or displaceable relative to one another. However, a combination of drum-like or sleeve-like mask bodies or valve bodies, which are mounted, for example, in a manner that can be displaced or rotated relative to one another, or both, would also be possible. Through the relative adjustment of the mask bodies or valve bodies, it is possible for passage openings or flow openings of the two mask bodies or valve bodies to be adjustable into different relative positions to one another, in which they are aligned with one another and then provide a maximum flow cross section or are adjustable or adjusted relative to one another in such a way that, for example a closed surface or wall surface of one mask body or valve body completely or at least partially covers a passage opening of the other mask body or valve body, so that the flow cross section of this covered passage opening is closed or reduced.

An advantageous measure provides that at least one suction channel extends along a longitudinal axis of the processing body and is fluidly connected to the suction connection and to the inflow openings of at least one of the first processing surface parts or the at least one second processing surface part by means of transverse channels or a flow-permeable structure. The air flow can flow from the inflow openings to the suction connection via the, so to speak, elongated suction channel. One or more such suction channels can be provided. It goes without saying that all suction channels can extend over the entire longitudinal length of a processing body. However, it is also possible for one or more suction channels to extend or extend only over part of a longitudinal length of the processing body. A length of a suction channel is preferably designed such that it extends from the processing surface area to be suctioned essentially to the suction connection.

A suction channel can also serve, for example, as a valve body or valve seat, particularly in the embodiment that is explained below
The at least one suction channel has, for example, passage openings which are fluidly connected to the inflow openings of the processing surface areas. However, it is also possible for the suction channel to have a porous structure or to be at least partially permeable to air in some other way, so that air flowing in through the inflow openings can flow into the suction channel.

It is expediently provided that in the at least one suction channel there is a particularly tubular and/or rod-shaped air guide body, for example in the manner of a mask body or valve body, as described above. is rotatable about an axis of rotation extending along the longitudinal axis and/or mounted displaceably along a sliding axis.

The air guide body advantageously has at least one flow opening on its outer circumference, which is fluidly connected to a flow channel which extends along the longitudinal axis and is fluidly connected to the suction connection, so that by adjusting the air guide body in the suction channel, the at least one flow opening of the air guide body is relative to the inflow openings and / or to at least one passage opening of the suction channel communicating with the inflow openings of at least one processing surface area can be adjusted to change the effective flow cross section of the inflow openings with respect to the suction connection.

The at least one suction channel is, for example, a mask body or valve body that is stationary with respect to the processing body, relative to which the movable mask body or valve body is movably mounted in the form of the air guide body. For example, both mask bodies or valve bodies are tubular or sleeve-shaped.

It is possible for such air guide bodies to be arranged in each suction channel or in several suction channels if the suction channels are separate from one another.

It is preferably provided that the suction channel comprises a suction channel body in which the air guide body is rotatably and/or displaceably mounted.

The air guide body, in particular the mask body or valve body, advantageously has at least one or at least one throughflow opening on a first angular segment region or longitudinal region of its outer circumference, in particular a row arrangement of throughflow openings arranged next to one another along the longitudinal axis, and no throughflow openings or throughflow openings on at least a second angular segment region or longitudinal region with a smaller flow cross section than at the first angle segment region, the flow openings being fluidly connected to the flow channel, which extends along the longitudinal axis and is fluidly connected to the suction connection. By rotating and/or moving the air guide body, the first angular segment region or the at least one second angular segment region or the first longitudinal region and the first longitudinal region are in flow connection with the inflow openings of the first processing surface section or the at least one second processing surface section in order to adjust the effective flow cross section between the suction connection and can be brought to the respective processing surface.

A configuration is possible in which the air guide body is mounted in a longitudinally displaceable manner in the suction channel, with through-flow openings of the air guide body in the suction channel, which communicate with its flow channel, with flow openings of the suction channel, which communicate with the inflow openings of a respective processing surface or processing surface section are flow-connected, can be placed in alignment, so that the suction air can flow through the inflow openings of the processing surface or processing surface section and the flow openings of the suction channel into the flow channel of the air guide body. The flow openings of the air guide body can also be adjusted away from the flow openings of the suction channel, so that the flow openings of the suction channel are at least partially covered and thus no suction air can flow into the flow channel of the air guide body through the inflow openings of the associated processing surface or processing surface area.

It is also useful if the air guide body has sealing contours on its outer circumference that extend in the longitudinal direction and delimit at least one angle segment area, in particular sealing projections or sealing ribs, which rest on an inner circumference of the suction channel. However, a longitudinal region can also be separated from another longitudinal region by at least one sealing contour, with the sealing contour then extending in the circumferential direction extends. Thus, for example, a tubular or sleeve-shaped air guide body with ribs or sealing contours projecting radially outward can be rotatably provided in a suction channel. However, the ribs or sealing contours do not have to lie flat or sealingly on the inner circumference of the suction channel, but can also be provided with a certain amount of play so that the air guide body can be rotated or moved more easily.

A suction channel is advantageously provided for each processing surface, which extends along the longitudinal axis of the processing body and is fluidly connected to the inflow openings of the respective processing surface. For this purpose, for example, several dedicated suction channels can be arranged in the processing body as bores, channel bodies or the like. However, it is also possible for a single flow body, for example a tubular body, to be divided into angle segments or cross-sectional segments, in each of which a suction channel is formed. For example, in such a flow body, which can also be seen in the drawing, partitions or intermediate walls can be provided that separate the suction channels from one another.

The mask body or valve body is expediently arranged between the suction connection and the suction channels.

The mask body is advantageously mounted movably, in particular rotatably and/or displaceably, using the bearing for positioning the passage section and the at least one reducing section between a respective suction channel and the suction connection.

It is therefore possible, for example, for the mask or the valve body to be arranged between the suction connection and the individual suction channels, for example on the front side of the suction channels, and to be mounted in a relatively adjustable manner, for example rotatably mounted and/or displaceably mounted around a respective suction channel to close it, so to speak, or to release its flow cross section. However, it is also easily possible that a respective suction channel is only partially closed, so that its flow cross section towards the suction connection is reduced.

It is advantageously provided that a connecting element of the suction connection for connecting a suction hose is rotatably mounted to the processing body, wherein advantageously the processing body and the suction hose can be rotated relative to one another without adjusting the adjusting device. The connection element is expediently sleeve-shaped or comprises a sleeve. In this way, a rotational decoupling of the suction hose relative to the processing body is possible, which, among other things, makes handling easier. But unintentional adjustment of the adjustment device, possibly caused by the suction hose, can also be easily avoided by rotating decoupling.

It is expediently provided that an inlet channel arrangement which is laterally open to the processing surface and is fluidly connected to the suction connection via at least one of the inflow openings or the inflow openings is arranged on the at least one processing surface or processing surface part. In particular, a labyrinth is provided or a tree-like structure of inlet troughs or an inlet trough arrangement is provided. The inlet channel arrangement advantageously comprises at least two, preferably several, branched inlet channels, which are at least partially open, so that suction air can reach an inflow opening via the inlet channels.

Figur 1

eine perspektivische Schrägansicht eines Oberflächen-Bearbeitungsgeräts,

Figur 2

eine perspektivische Schrägansicht eines Schleifmittels für das Bearbeitungsgerät gemäß Figur 1,

Figur 3

eine Explosionsdarstellung einer Einstelleinrichtung zur Einstellung einer Absaugwirkung bei dem Bearbeitungsgerät gemäß vorstehender Figuren,

Figur 4

eine Frontalansicht auf einen Bearbeitungskörper des Bearbeitungsgeräts gemäß vorstehender Figuren zur Verdeutlichung von dessen Außenumfangskontur, die in einem in

Figur 5

dargestellten Querschnitt entlang einer Schnittlinie A-A in Figur 1 deutlich wird,

Figur 6

einen Längsschnitt durch das Bearbeitungsgerät gemäß Figur 1, entlang einer Schnittlinie A-A in Figur 1,

Figur 7

ein Detail D1 aus Figur 6,

Figur 8

eine Seitenansicht einer alternativen Einstelleinrichtung zur Einstellung einer Absaugwirkung bei dem Bearbeitungsgerät gemäß vorstehender Figuren,

Figur 9

einen Längsschnitt durch die Einstelleinrichtung gemäß Figur 8, entlang einer Schnittlinie C-C in Figur 8,

Figur 10

ein Detail D2 aus Figur 9,

Figur 11

eine Explosionsdarstellung der Einstelleinrichtung gemäß Figuren 8-10,

Figur 12

einen Maskenkörper der Einstelleinrichtung gemäß Figur 11 in perspektivischer Schrägansicht,

Figur 13

einen alternativen Bearbeitungskörper sowie eine Einstelleinrichtung mit einem Funktionsprinzip ähnlich der Einstelleinrichtung gemäß Figuren 8-12, wobei der Bearbeitungskörper voneinander separate, rohrförmige Absaugkanäle aufweist,

Figur 14

den Bearbeitungskörper und die Einstelleinrichtung gemäß Figur 13, jedoch in einer anderen Einstellposition der Einstelleinrichtung,

Figur 15

die Anordnung gemäß Figur 13, 14, wobei die Einstelleinrichtung noch weiter verstellt ist, und

Figur 16

einen als Stufenkörper ausgestalteten Bearbeitungskörper.

Exemplary embodiments of the invention are explained below with reference to the drawing. Show it:

Figure 1

a perspective oblique view of a surface processing device,

Figure 2

a perspective oblique view of an abrasive for the processing device according to Figure 1 ,

Figure 3

an exploded view of an adjusting device for adjusting a suction effect in the processing device according to the above figures,

Figure 4

a frontal view of a processing body of the processing device according to the above figures to illustrate its outer circumferential contour, which is in an in

Figure 5

shown cross section along a section line AA in Figure 1 becomes clear,

Figure 6

a longitudinal section through the processing device Figure 1 , along a cutting line AA in Figure 1 ,

Figure 7

a detail D1 Figure 6 ,

Figure 8

a side view of an alternative setting device for setting a suction effect in the processing device according to the above figures,

Figure 9

a longitudinal section through the adjusting device Figure 8 , along a cutting line CC in Figure 8 ,

Figure 10

a detail D2 Figure 9 ,

Figure 11

an exploded view of the adjusting device according to Figures 8-10 ,

Figure 12

a mask body according to the adjusting device Figure 11 in perspective oblique view,

Figure 13

an alternative processing body and an adjusting device with a functional principle similar to the adjusting device according to Figures 8-12 , wherein the processing body has separate, tubular suction channels,

Figure 14

the processing body and the adjusting device accordingly Figure 13 , but in a different setting position of the setting device,

Figure 15

according to the order Figure 13, 14 , with the adjustment device being adjusted even further, and

Figure 16

a processing body designed as a step body.

A processing device 10 comprises a processing body 20, on the outer circumference of which several processing surfaces 21, 22 and 23 are provided. Using the processing surfaces 21-23, a schematically indicated workpiece W can be processed on its workpiece surface O, for example ground and/or polished. The processing surfaces 21-23 extend on an outer circumference 24 of the cylindrical processing body 20. The processing body 20 has a longitudinal shape and extends along a longitudinal direction or longitudinal axis L.

The processing surface 21 is equipped as a flat surface 25 or flat surface with which a correspondingly flat workpiece surface O can be optimally processed. The processing surface 21 or flat surface 25 is provided on a processing surface part 28, which is designed as a flat surface part 26 based on the flat surface 25.

The processing surfaces 22 and 23, on the other hand, are curved processing surfaces and are provided on processing surface parts 29, 30, which form components of a curved part 27.

The processing surfaces 21-23 merge continuously into one another, so that they can also be referred to as a single processing surface. The distinction between processing surfaces 21-23 is intended in particular to clarify the assignment to the processing surface areas 28-30.

In any case, the curved processing surfaces 22-23 in principle form a single processing surface, which, however, has different radii of curvature and thus different geometric properties, which will become clear below.

The curvature section 27 has a plurality of curvature sections 31, 32, 33, 34, 35, 36 which continuously merge into one another and which have different radii of curvature, for example radii of curvature R1, R2, R3, R4, R5. The curvature sections 31-36 merge continuously into one another, which means that in the end there are also further radii of curvature that are not specifically named here. It is possible, for example, that the curvature section 27, starting from the radius of curvature R1, has a large number of radii of curvature, which are not explained in detail, up to the radius of curvature R5.

The flat surface section 26 goes into one Figures 4 and 5 Transition area 37 shown on the right tangentially into the curved section 27. The smallest radius of curvature R1 is present there. The curvature section 27 protrudes laterally in front of the flat surface section 26 in the transition area 37. However, the curved section 27 does not protrude frontally in front of the flat surface 25 and/or in its normal direction. A flat contact of the flat surface 25 on the workpiece surface O is therefore possible without being affected by the curved section 27. However, the narrow radius of curvature R1 enables the machining of correspondingly curved or narrow parts of the workpiece surface O.

In contrast to the radius R1, the radius R5 is significantly larger, for example at least twice as large or three times as large, preferably about four times as large as the radius R1, so that the curvature section 27 leads to a transition region 38, where the curvature section 27 lies at an angle to the flat surface section 26 adjoins, ends relatively flat, for example with an angle of less than 90 °, preferably 80-70 °. The transition region 38 and the transition region 37 are provided on opposite sides of the flat surface part 26 and extend along the longitudinal axis L.

Overall, the processing body 20 has a cylindrical, wing-like shape, with the underside of the "wing" being flat or flat, in contrast to a real wing, and therefore not having any concave or convex curvature. The top of this wing extends convexly over the flat surface 25 and is round at the transition area 37, while in the transition area 38 it ends at an angle with respect to the flat surface 25.

A transverse width B1 of the flat surface 25 or the flat surface section 26 is almost as large as a transverse width B2 of the curved section 27, so that the surface of the curved section 27 and the flat surface 25 that can be effectively used for workpiece machining are of similar size.

However, the usable surface of the curved section 27 is larger in that the transverse width B2 is larger than the transverse width B1 and the curved section 27 also extends convexly over the flat surface section 26, so to speak arches. The processing body 20 has a height H, over which the curvature section 27 arches over the flat surface section 26.

The height H is expediently about half as large as the transverse width B1 or B2.

Overall, this results in a processing body 20 that is compact, handy and therefore easy to grasp manually.

The angular transition region 38 is not intended for workpiece machining in the exemplary embodiment. In principle, this would be possible without further ado, for example if there is an appropriate polishing agent or abrasive available.

In the present embodiment, however, it is provided that a base material or base material 39 of the processing body 20 is exposed in the transition region 38, ie no polishing agent or abrasive is provided and also no adhesive or holding agent 40, which otherwise extends over the outer circumference 24 of the processing body 20. The base material 39 is, for example a polyurethane foam or other elastic material. The adhesive or holding means 40 includes, for example, a Velcro layer, adhesive layer or the like.

The transition area 38, which is provided without holding means 40, has a grip zone or grip areas 41, on which an abrasive 120, explained below, in the form of a sanding sheet can be easily gripped and thus removed from the processing body 20.

The relatively soft processing body 20 is covered on its end faces, so to speak the cylinder base surfaces, by covers 42, 43 and is therefore protected. The covers 42, 43 are preferably harder than the base material 39, for example made of a thermoplastic. The covers 42, 43 include, for example, cover plates or are designed as such. The covers 42, 43 can be glued to the foam material of the processing body 20.

The abrasive 120 has holding means 140, for example a Velcro layer or Velcro hooks, which interact with the holding means 40 of the processing body 20 in the sense of a solid neck suitable for surface processing of the workpiece W. In other words, the abrasive 120 can be releasably attached to the outer circumference 24 of the processing body 20 using the holding means 140, 40. This is known per se. On a side of the abrasive 120 opposite the side having the holding means 140, an abrasive material 124, for example an abrasive fabric, a grain or the like, is provided, with which the workpiece surface O can be treated in the sense of abrasive processing or grinding processing.

Alternatively, it would of course also be possible for an abrasive, polishing agent or the like to be arranged directly on the outer circumference 24 of the processing body 20, for example the abrasive material 124.

When the abrasive 120 is arranged on the processing body 20 (not shown, it takes the in Figure 2 schematically indicated shape of the outer circumference 24 of the processing body 20. The abrasive 120 therefore has a processing surface 121 and processing surfaces 122, 123, which rest on the processing surfaces 21, 22, 23 of the processing body 20. The processing surface 121 forms a flat surface 125 and thus a flat surface part 126, while the other processing surfaces 122, 123 form components of a curvature part 127, corresponding to the curvature part 27 of the processing body 20.

The abrasive 120 has side edges 141, which come to rest on the grip areas 41 when the abrasive is arranged on the processing body 20. There, the abrasive 120 can be easily gripped and, so to speak, removed from the processing body 20, with the holding means 40, 140 becoming detached from one another.

Furthermore, inflow openings 150, 151, 152 are provided on the processing surfaces 121, 122, 123, through which dust can be extracted, which is formed, for example, during abrasive processing of the workpiece surface O using the abrasive material 124.

The inflow openings 150-152 are made, for example, in the form of holes, protruding tongues or the like.

When the abrasive 120 is mounted or arranged on the processing body 20, the inflow openings 150-152 communicate with inflow openings 50, 51 and 52 on the processing surfaces 21, 22, 23, and therefore with inflow openings 50, 51 and 52 on the processing surface parts 28-30 are provided.

The inflow openings 50, 51, 52 have, for example, angular distances with angles W1 and W2, which are preferably the same. Dust extraction is therefore possible on mutually angled sides of the processing body 20, namely at angular distances W1 and W2.

The inflow openings 50, 51, 52 are fluidly connected to an inlet channel arrangement 53, the inlet channels 54, 55, 56 of which are open to the respective processing surface 21, 22, 23. The inlet channels 54-56 are mentioned as examples and represent a plurality of inlet channels that branch away from the inflow openings 50-52. Above a respective inlet channel 54-56, one or more of the inflow openings 150-152 of the abrasive 120 are arranged, so that dust-laden air passes through the respective inflow opening 150-152 into the inlet channels 54-56 and from there further into the inflow openings 50, 51 and 52 can stream. An inflow opening 50-52 is therefore not provided for each of the inflow openings 150-152. Rather, dust air can flow through several inflow openings 150-152 and via the inlet channels 54-56 to the inflow openings 50-52. Furthermore, it is possible for an inlet channel 54, 55 or 56 to communicate or be fluidly connected to several of the inflow openings 50 or 51 or 52, as shown in the example of the flow channel 55 in Figure 1 is indicated. In any case, it is ensured that dust extraction is provided under a plurality of inflow openings 150-152 of the abrasive 120.

When using the processing device 10, the processing body 20 is usually only partially in engagement with the workpiece W. For example, only one of the processing parts 28, 29 or 30 is effectively used, while the other processing parts are not used. The operator will select the processing section 28, 29, 30 which is best adapted to the respective surface geometry of the workpiece surface O or which enables optimal grinding or polishing processing. The problem here is that dust extraction would not only take place at the processing section 28, 29, 30 that is being used, but air would also flow over the processing section 28 or 29 or 30 that is not being used, i.e. false air would flow, so to speak. The measures explained below provide effective relief here:
The dust extraction can be effectively adjusted using an adjusting device 60, 260, 360. The setting device 60 is in the processing device 10 according to figure ren 1-7 provided, the setting device 260 in a processing device 210 according to Figures 8-12 and the setting device 360 in a processing device 310 according to Figures 13, 14 and 15 . The processing devices 210, 310 have processing bodies 220, 320, which are constructed the same with regard to their basic external design, for example the outer circumference 24, the processing surface parts 28-30 and the like, and therefore are not explained in more detail. However, the flow concept and the setting thereof are designed differently for the suction flow. The adjustment devices 60, 260, 360 make it possible to switch the suction between the inflow openings 50, 51 and 52 and, in advantageous embodiments, to influence the suction power or the effective flow cross section for the suction available for the inflow openings 50, 51 and 52.

The inflow openings 50, 51 and 52 are fluidly connected to a suction connection 11 via a channel arrangement 57 and the adjusting devices 60, 260, 360. The suction connection 11 comprises, for example, a connection element 12, in particular in the form of a connection piece, to which a suction hose SL can be connected, which leads to a suction device AB. The suction device AB includes, for example, a mobile vacuum cleaner or a stationary central dust extraction system.

At this point it should be mentioned that in a processing device according to the invention, dust extraction can of course also be provided on board the processing device. For example, it is possible for a dust collection container to be connected to the suction connection 11. A fan or other flow generator is then preferably assigned or connected upstream of this to generate a suction flow which can flow via the inflow openings which are assigned to the processing surfaces, in particular a respective processing surface section, in the exemplary embodiment, i.e. the inflow openings 50 or 51 or 52.

The connection element 12 includes, for example, a connection section 13 for attaching or inserting the suction hose SL. At the connection section 13, ribbing is preferably provided. The connecting element 13 further has a connecting section 14, which is provided for rotatable connection to the components of the adjusting device 60, which are explained further below.

The channel arrangement 57 comprises transverse channels 58, which lead inwards from the inflow openings 50, 51, 52 in the processing body 20, 220, 320 and open into a central suction channel 45 via passage openings 68 in the processing body 20, into separate suction channels 245 in the processing body 220, 246, 247 and in the processing body 320 into separate suction channels 345, 346, 347.

The suction channels 45, 245, 246, 247 and 345, 346, 347 extend along the longitudinal axis L of the processing body 20, 220, 320, preferably over the entire or almost the entire longitudinal length of the processing body 20, 220, 320. They are on the front side, for example closed by the covers 42, although another closure would also be possible.

The suction channel 45 is provided in a suction channel body 65 which has a tubular shape. The suction channel body has, for example, a peripheral wall 66 which is designed to be tubular. The peripheral wall 66 or the suction channel body 65 is expediently provided with ribs 67, which improve the hold in the base material 39 of the processing body 20. For example, the suction channel body 65 is foamed with the base material 39. On the front side, the suction channel body 65 can be closed by the cover 42, but also by a base which is integrally formed on the suction channel body 45. The cover 42 has, for example, a closure projection 42a, which can be inserted into the suction channel body 65 or a cavity of the processing body 20 having the suction channel body 65.

Through openings 68 are also provided on the peripheral wall 66, which are fluidly connected to the transverse channels 58, in particular aligned. Dust air can thus pass through the inflow openings 50-52 and the transverse channels 58 as well finally flow through the passage openings 68 in order to get into the suction channel 45.

On the side facing the suction connection 11, the suction channel body 55 has a connection section 69, for example a connection sleeve 70. A screw thread 71, in particular an internal thread, is preferably provided on the connection section 69, which is connected to the peripheral wall 66 or represents an extension thereof . Alternatively, a contact surface could also be provided for gluing or latching or the like.

The suction channel 45 extends in the suction channel body 65 and opens out of the suction channel body 65 at the connection section 69.

A connection element 73 is connected to the connection section 69, for example screwed in. The connection element 73 comprises, for example, a tubular or sleeve-shaped connection body 74, which has a screw thread 75 on a connecting section. The screw thread 75 is screwed into the screw thread 71 of the suction channel body 65 to create a substantially airtight connection.

The connecting body 74 penetrates, for example, a passage opening 44 in the cover 42.

A space 77 is provided between an end face 76 of the connecting body 74 and the bottom of a receptacle 72 of the connecting section 69, in which the screw thread 71 is arranged.

The connecting element 73 has a bearing receptacle 78, into which an adjusting element 80 engages and in which the adjusting element 80 is rotatably mounted. An axis of rotation D of the adjusting element 80 with respect to the bearing receptacle 78 corresponds, for example, to the longitudinal axis L. The connecting element 73 and the adjusting element 80 together form bearing elements of a rotary bearing.

The adjusting element 80 has a channel body 81 which protrudes from an adjusting section 82 of the adjusting element 80 towards the suction channel body 65. The adjusting section 82 has, for example, a receptacle 83 into which the connecting element 12 engages with the connecting section 14. The receptacle 83 forms a pivot bearing receptacle in which the connecting section 14 is rotatably mounted, so that a rotational decoupling between the connecting element 12 or the suction connection 11 on the one hand and the processing body 20 and/or the adjusting device 60 is created.

There is preferably a holding projection 84 in the receptacle 83, for example an annular or partially annular rib arranged on the inner circumference of the receptacle 83 and projecting radially inwards, which engages in a corresponding recess 15 on the connecting section 14 of the connecting element 12. Using the holding projection 84 and the recess 15, the connecting element 12 is fixed in a tensile manner with respect to its axis of rotation, about which it can rotate relative to the receptacle 83. In this case, the axis of rotation corresponds to the longitudinal axis L or is parallel to the longitudinal axis L.

It is expedient if the connecting element 12 rests with a flange projection 16 on an end face 85 of the adjusting element 80. It is also advantageous if an end face of the connecting element 12 or the connecting section 14 is supported on the bottom of the receptacle 83.

Due to the rotational bearing on the one hand of the connecting element 12 on the adjusting element 80 and on the other hand of the adjusting element 80 with respect to the processing body 20 or the connecting element 73, the adjusting element 80 can rotate freely between the suction hose SL and the processing body 20.

The adjusting element 80 is held on the connecting element 73 in a tensile manner with respect to the longitudinal axis L or its axis of rotation D relative to the connecting element 73 by means of a latching mechanism. For example, hook projections 86 are provided on the adjusting element 80 and protrude in front of the adjusting section 82. The hook projections 86 have hook lugs 87, which engage in the gap 77, so that through this rear grip the adjusting element 80 is fixed to the connecting element 73 in a tension-proof manner with respect to the longitudinal axis L of the rotation axis D with respect to the connecting element 73. The hook projections 86 are spaced from one another in the circumferential direction, so that they are radially movable to the extent that they can lock in the bearing receptacle 78. The adjusting element 80 can therefore be inserted and locked into the bearing holder 78 along the longitudinal axis L or the axis of rotation D. Assembly is easy.

Fixing means 88 are preferably provided, in particular a locking device or locking means. The fixing means 88 include, for example, locking lugs 89, which protrude radially outward in front of the hook projections 86 and engage in corresponding locking recesses 79 of the connecting element 73. The locking recesses 79 are provided, for example, on an inner circumference of the bearing holder 78.

An air guide body 90 is connected in a rotationally fixed manner to the adjusting element 80, in particular the channel body 81. For example, the channel body 81 is inserted into the air guide body 90 and is glued, locked, pressed or otherwise firmly connected to it in the area of a connecting part 81A. So when the adjusting element 80 is rotated about the axis of rotation D, the air guide body 90 rotates accordingly.

A combination of groove and projection projecting into the groove or similar other mechanical rotation angle marking 81B, which is provided, for example, between the channel body 81 and the inner circumference or the flow channel 94 of the air guide body 90, ensures that the adjusting element 80 and the air guide body 90 are mounted to one another at the correct angle of rotation .

The air guide body 90 has a cylindrical or tubular shape and extends along the longitudinal axis L in the suction channel 45. The air guide body 90 is rotatably mounted in the suction channel 45. The air guide body 90 has a peripheral wall 91 on which flow openings 92, 93 are provided, through which air can flow into an interior of the air guide body 90, namely into a flow channel 94. On the outer circumference of the air guide body 90, sealing contours 95, for example longitudinal ribs, are provided, which rest on the inner circumference of the suction channel 45 or are at least arranged close to this inner circumference. Angle segments of the air guide body 90 are, so to speak, separated from one another by the sealing contours 95. For example, one of the angle segments includes the flow openings 92, another angle segment includes the flow openings 93. The other angle segments, which are separated from one another by the sealing contours 95, have no flow openings and are therefore flow-tight.

By rotating the air guide body 90 in the suction channel 45 about the axis of rotation D, the flow openings 92 can be positioned relative to the through openings 68 assigned to the inflow openings 50 or 51 or 52, so that dust air S flows through the respective inflow openings 50 or 51 or 52, the transverse channels 58 and the flow openings 92 can flow into the flow channel 94 and can flow further via the adjusting element 80 to the suction connection 11, where the dust air S can flow from a flow channel 17 of the connection element 12 into the suction hose SL. A flow cross section of this flow connection is maximum.

The air guide body 90 therefore forms a valve body or mask body 96, the flow cross section which is available for the respective inflow openings 50, 51 or 52 for suction via the suction connection 11 depends on the rotational position of the latter in relation to the axis of rotation D.

A respective rotational position adjustment position of the air guide body 90 or the adjustment body 80 can be traced using at least one index 97, which is arranged, for example, on the outer circumference of the sleeve-shaped adjustment body 80. Symbols 98 for the respective processing surface area 28, 29, 30 are also advantageously arranged on the setting body 80, in particular close to the index or indices 97. The operator can therefore easily see which processing surface area 28, 29, 30 is in the respective rotational position of the adjustment body 80 and the air guide body 90 is currently being sucked out, for example if only the flow openings 92 are present.

The flow openings 93, on the other hand, are an option. The number or the effective flow cross section of the flow openings 93 is smaller than the number or the effective flow cross section of the flow openings 92. If the flow openings 93 are opposite the through openings 68, there is still suction via the inflow openings 50 or 51 or respectively assigned to the through openings 68 52 possible, but with a smaller suction power or suction effect compared to the suction via the flow openings 92.

An embodiment is also possible in which, for example, the flow-through openings 92 or the flow-through openings 93 or a combination of both, i.e. both the push-through openings 92 and the flow-through openings 93, are positioned relative to the flow-through openings 68 assigned to a respective processing surface section 28, 29, 30. The suction power for a respective processing surface 28, 29, 30 can therefore be changed in a total of 4 stages: no flow, larger flow via the flow openings 93, even larger flow via the flow openings 92 and maximum flow via the combination of the flow openings 92 and 93.

At the in the Figures 8-11 In the setting device 260 shown, an adjustment facial expression arranged at the front near the suction connection 11 ensures that the dust air can flow through one of the suction channels 245, 246 or 247 or the flow cross section of these suction channels 245, 246 or 247 is released or closed. A mask body 296 of the adjusting device 260 is arranged between the suction connection 11 and the end face or on the end face of the processing body 220.

The suction channels 245, 246 or 247 run in a suction channel body 265, which extends along the longitudinal axis L in the processing body 220. The suction channel body 265 has a peripheral wall 266 which is tubular Interior limited, in which partition walls 267 extending along the longitudinal axis and connected to one another, approximately in the center of the suction channel body 265, are arranged. The partitions 267 are arranged, for example, in a star shape and separate the interior of the suction channel body 265, which is delimited by the peripheral wall 266, into the suction channels 245, 246 or 247. On the peripheral wall 266, passage openings 268 are provided which communicate with the suction channels 245, 246 or 247 and are fluidly connected to transverse channels 58, which in turn communicate with the inflow openings 50, 51, 52 and thus the processing surface areas 28, 29, 30. Thus, each processing surface section 28, 29, 30 is assigned one of the suction channels 245, 246 or 247.

Using an adjusting element 280 of the adjusting device 260, one of the suction channels 245, 246 or 247 can be fluidly connected to the suction connection 11, so that as a result one of the processing surface parts 28, 29 or 30 is fluidly connected to the suction connection 11 and a suction for the respective processing surface part 28, 29 or 30 is ready. The adjusting element 280 forms or includes the mask body 296.

The adjusting element 280 rotatably accommodates the connection element 12 already explained. For example, the adjusting element has a receptacle 283 in which the connecting section 14 is rotatably mounted. For example, a holding projection 284 arranged on the receptacle 283, for example an annular holding projection 284 in the manner of the holding projection 84, engages in its recess 15, so that the connecting element 12 is rotatable with respect to its axis of rotation D, but not along the axis of rotation D Recording 283 can be pulled out. Therefore, the adjusting element 280 is rotatably mounted relative to, for example, the suction hose SL or, conversely, the suction hose SL is rotatably mounted with respect to the adjusting element 280.

Furthermore, the adjusting element 280 is rotatably mounted relative to a connecting element 270, which is non-rotatable with respect to the processing body 220 and the suction channel body 265. The connection element 270 includes, for example, one Sleeve section 273, in which the suction channel body 265 is received or into which it is inserted.

The connection element 270 projects, for example, in front of a cover 243 and is preferably integrally connected to it, which in principle corresponds to the cover 43 and covers the processing body 220 on the front side. The cover 243 has a passage opening 244.

A bearing holder 278 for the adjusting element 280 is provided on the connecting element 270. The adjusting element 280 is rotatably accommodated in the bearing holder 278. On the inner circumference of the bearing receptacle 278 there is, for example, a support projection 287 which engages in a support receptacle 277 of the adjusting element 280. The support projection 287 and the support receptacle 277 form a pull-out protection or ensure that the adjusting element 280 is rotatable with respect to its axis of rotation D of the bearing receptacle 278, but cannot be pulled out of this bearing receptacle 278 along the axis of rotation D.

The adjusting element 280 is supported with end-side support projections 282 on the bottom of the bearing holder 278, in particular on an annular bearing surface 275. In the area of the bearing surface 275 there are additionally provided locking recesses 279, in any case at least one locking recess 279, which are or are intended for locking with one or more locking projections 289. The at least one locking projection 289 projects in front of the support projections 282 and engages in the locking recess 279 in the respective setting positions of the adjusting element 280. The elasticity of the locking projection 289 is preferably increased in that it has a cavity 289A into which an arcuate section 289B of the locking projection 289 can deform.

On the outer circumference of the sleeve-shaped adjusting element 280, for example its peripheral wall 291, symbols 98A and 98B and another symbol not visible in the drawing are provided, which indicate the suction with respect to a respective processing surface area 28, 29 or 30.

An end wall 295 extends in the interior of the adjusting element 280, on which a flow opening 292 and optionally a flow opening 293 are provided. The flow opening 292 has a large area and extends over an angular segment which corresponds to the flow cross section of a suction channel 245-247. So if the flow opening 292 is located frontally in front of one of the suction channels 245-247 or is aligned with it, a maximum flow cross section is available for the processing surface area 28-30 assigned to the respective suction channel 245-247. However, if the smaller cross section of the flow opening 293 is in front of a respective suction channel 245-247, the flow cross section is smaller and the suction performance is therefore reduced. If the end wall 295 completely or partially covers one of the suction channels 245-247, the processing surface area 28, 29 or 30 assigned to the suction channel is not vacuumed or is vacuumed with reduced suction power. The adjusting element 280 therefore influences the effective flow cross section that is available for suction of a respective processing section 28, 29, 30.

The latching arrangement or the latching means with the latching projection 289 and the latching recess 279 is preferably designed so that in a respective latching position the flow opening 292 is aligned with one of the suction channels 245-247.

A cross section of the flow opening 292 expediently corresponds to a flow cross section of a suction channel 245, 246, 247.

For the adjusting device 360, a concept similar in principle to the adjusting device 260 has been chosen, with the suction channels 345, 346, 347 being separate tubes that pass through the processing body 320 parallel to the longitudinal axis L. The individual tubes can, for example, be formed integrally during the manufacturing process of the processing body 320, for example when foaming the base material 39 with a corresponding shape.

Instead of a single mask body 296, one or more mask bodies 396, 496 can be provided, for example disk-like or drum-like mask bodies. The mask bodies 396, 496 are, for example, rotatably mounted with respect to the suction channels 345, 346, 347 about an axis of rotation which is not visible in the drawing and extends between the suction channels 345, 346, 347 parallel to the longitudinal axis L. The axis of rotation corresponds, for example, to the axis of rotation D already explained.

The mask body 396 has, for example, a flow opening 392 and preferably a further flow opening 393, which can be aligned with the suction channels 345, 346, 347 by rotating about the aforementioned axis of rotation. The mask body 396 therefore forms an adjusting element 380.

In Figure 13 For example, the flow opening 392 is aligned with the suction channel 347, while the flow opening 393 is aligned with the suction channel 346, thus providing a smaller flow cross section there. Accordingly, the processing surface area 30 is vacuumed with a higher suction power than the processing area area 29. In Figure 14 you can see the mask body 396 rotated counterclockwise, so that the flow opening 392 is only partially in front of the suction channel 347, so the suction power or the flow cross section is reduced there. In Figure 15 the flow opening 392 is aligned with the suction channel 346, so that a maximum suction power is available on the processing surface part 29, while the suction on the processing surface part 30 is switched off, so to speak.

It can be seen that a continuous adjustment of a suction power or a flow cross-section would be possible using the mask body 396 alone, in that the mask body 396 or the adjusting element 380 cannot only be in those adjustment positions in which the flow opening 392 is connected to one of the suction channels 345, 346 , 347 is aligned, but also in intermediate positions in which the flow opening 392 is only partially in front of one of these suction channels stands and enables a reduced flow through the respective suction channel by the suction flow S.

The options for adjusting the suction power on one or more of the processing surface areas 28, 29 or 30 can be improved by the additional mask body 496. This has, for example, a flow opening 492, which makes variable flow cross sections between the suction connection 11 and the suction channels 345, 346, 347 adjustable by rotating the mask body 496 relative to the suction channels 345, 346, 347 and relative to the flow openings 392 and optionally 393.

A processing body 420 ( Figure 16 ) is designed as a stepped body. The processing body 420 has, for example, partial processing bodies 420A, 420B, which have different cross sections. Both partial processing bodies 420A, 420B are arranged directly next to one another or border one another, with a step 418 being provided between the two partial processing bodies 420A, 420B. The partial processing bodies 420A, 420B can be made in one piece or in one piece.

The partial processing bodies 420A, 420B have the following in the exemplary embodiment Figure 16 Although they have the same cross-sectional geometry, they have different cross-sectional area dimensions. This results in that curved sections 427A, 427B of the partial processing bodies 420A, 420B have the same basic geometric contours, but different radii.

The partial processing bodies 420A, 420B have curvature parts 427A, 427B, which correspond geometrically to the curvature part 27, and flat surface parts 426A, 426B, which correspond to the flat surface part 426.

In principle, it would be possible for the partial processing bodies 420A, 420B to be coaxial with respect to a longitudinal axis that passes centrally through their respective cross sections. In the present case, however, an embodiment has been selected in which the flat surface parts 426A, 426B of the partial processing bodies 420A, 420B overlap one another merge, that is, merge into one another without a step, so that a continuous flat surface section 426 is formed.

However, the step 418 is provided between the curved parts 427A, 427B of the partial processing bodies 420A, 420B.

Furthermore, the configuration of the processing body 420 is such that processing surfaces 422A, 422B of the partial processing bodies 420A, 420B are aligned with one another at least in a transition region 438 corresponding to the transition region 38 to the flat surface part 426, while between processing surfaces 423A, 423B, which are the processing surfaces already explained 23 are similar in principle, and the step 418 is formed between the transition areas 437A, 437B, which are basically the same as the transition area 37. Here, too, it should be said that this offset or step 418 can also be provided between the processing surfaces 422A, 422B if the partial processing bodies 420A, 420B are arranged differently relative to one another transversely to a longitudinal axis LA of the processing body 420 (not shown ).

Suction is preferred for the processing body 420, i.e. that, for example, the connecting element 12 with the connecting section 13 is arranged on the processing body 420, in particular on the partial processing body 420A, which has a smaller cross section. However, it would also be possible to provide such a suction connection on the other partial processing body 420B, which has a larger cross section.

For example, the abrasive material 124, for example a grain, a granulate structure, a knitted fabric or the like, can be arranged directly on the processing body 420, in particular the processing surfaces 423A and/or 423B and/or 422A and/or 422B.

It is also possible that the processing body 420 has, for example, a holding means 480 comparable to the holding means 40 in the area of the processing surfaces 423A and / or 423B and / or 422A and / or 422B, on which an abrasive or polishing agent, for example a sanding sheet, polishing material, polishing fabric or polishing fabric or the like, can be releasably attached.

It is possible for different surface properties to be provided on the processing surfaces 423A, 423B, 422A, 422B, for example a holding means on one of the processing surfaces, a polishing material on another and a polishing fabric on another processing surface.

Claims (14)

1. Surface processing device (10), in particular manual grinding device or polishing device, with a processing body (20), which has at least one processing surface (21-23) for grinding or polishing a workpiece surface (O), where the processing body (20) has a flat surface portion (26) with a flat processing surface (21) for processing flat workpiece surfaces (O) and at least one curved portion (27) with a curved processing surface (22, 23) for processing curved workpiece surfaces (O), wherein the curvature section (27) extends over a side of the processing body (20) opposite the flat surface section (26), wherein the curvature section (27) has a plurality of continuously merging curvature sections (31-36) with mutually different radii of curvature (R1-R5) and not projecting in front of the flat processing surface (21-23) of the flat surface section (26), and wherein the curved section (27) merges tangentially into the flat surface section (26) at exactly one or at least one transition region (37), characterised in that the curved portion (27) and the flat surface portion (26) adjoin one another at an angle on at least one transition region (38) and the curved section (27) projects laterally next to the flat surface section (26) on exactly one side.
2. Processing device according to Claim 1, characterised in that a curvature portion (31-36) of the curvature section (27) at the at least one angular transition region (38) has a larger radius of curvature (R5) than at least one further curvature section (31-36) of the curvature section (27), in particular has a largest radius of curvature (R1-R5) or the largest radius of curvature (R5) of the curvature section (27).
3. Processing device according to any one of the preceding claims, characterised in that a radius of curvature (R1) of a curvature section (31-36) which merges tangentially into the flat surface section (26) is smaller than a radius of curvature (R2-R5) of at least one further curvature portion (32-36) of the curvature section (27), preferably all further radii of curvature (R2-R5) of the other curvature portions (32-36) of the curvature section (27).
4. Processing device according to any one of the preceding claims, characterised in that no polishing agent or abrasive (140) or holding agent (40) for holding an abrasive (140) or polishing agent is arranged on at least one, in particular angular, transition region (38) between the flat surface section (26) and the curved section (27).
5. Processing device according to any one of the preceding claims, characterised in that the curved section (27) and the flat surface section (26) extend on opposite sides of the processing body (20) for the most part over the entire transverse width thereof.
6. Processing device according to any one of the preceding claims, characterised in that the flat surface section (26) extends over a part of the cross-section of the processing body (20) and the curvature section (27) extends over all the remaining regions of the cross-section of the processing body (20).
7. Processing device according to any one of the preceding claims, characterised in that the curvature section (27) adjoins mutually opposite transverse end regions of the flat surface section (26).
8. Processing device according to any one of the preceding claims, characterised in that the processing body (20) is designed wholly or at least in sections as a cylinder and/or as a cone and/or as a stepped body, on the circumferential surface of which the curved section (27) and the flat surface section (26) are provided.
9. Processing device according to any one of the preceding claims, characterised in that the processing body (20) has, in the region of the curved section (27), the profile of the upper side of a wing, on the underside of which the flat surface section (26) is arranged.
10. Processing device according to any one of the preceding claims, characterised in that the processing body (20) is elastic at least in the region of the at least one processing surface (21-23) and/or has a foam material, in particular in the region of the at least one processing surface (21-23).
11. Processing device according to any one of the preceding claims, characterised in that the processing body (20) has holding means (40), in particular a Velcro layer, on its outer circumference (24) or on the processing surfaces (21-23) for holding an abrasive (140) or polishing agent and/or in that the processing body (20) has an abrasive (140) or polishing agent integrally on its outer circumference (24) and/or on the processing surfaces (21-23).
12. Processing device according to any one of the preceding claims, characterised in that the processing body (20) has a longitudinal shape and/or is configured as a cylinder.
13. Processing device according to any one of the preceding claims, characterised in that inlet openings (50-52) are arranged on the at least one processing surface (21-23) for suctioning off dust-laden dust air, where these inlet openings are flow-connected via a duct arrangement (57) to a suction connection (11) to which a suction device (AB) can be connected.
14. Processing device according to Claim 13, characterised in that an inlet duct arrangement which is open laterally with respect to the processing surface (21-23) is arranged on the at least one processing surface (21-23) and is flow-connected to the suction connection (11) by means of at least one of the inlet openings (50-52) or the inlet openings (50-52) and/or in that it comprises an adjustment device (60; 260; 360) for adjusting effective flow cross-sections, with which inlet openings (50-52) of a first processing surface section (29, 30) (28) of the at least one processing surface (21-23) and inlet openings (50-52) of at least a second processing surface section (29, 30) of the at least one processing surface (21-23) are flow-connected to the suction connection (11), so that a suction effect can be set and/or switched off at the first processing surface portion (28) of the at least one processing surface (21-23) and the at least a second processing surface portion (29, 30) of the at least one processing surface (21-23).

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