JPH11156691A - Material removing disposal tool for product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove materials from the surface of a workpiece very uniformly by inclining the outer peripheral surface of a tool main body in a relative manner, especially making self-adjustment, to a driving shaft. SOLUTION: When a driving shaft 4 is rotated to move from the axis (x) of a tool because of the slight inclination of a machine tool in the arrow direction C, a force applied to the tool is changed to deform the tool, and especially the outer peripheral surface 5 is inclined. An edge area 1a in contact with a workpiece surface 9 is deformed in the arrow direction V1. The deformation in the direction V1 affects an adjacent edge area and, since an edge area 1b facing the edge area 1a in the axial direction is deformed V2 in the reverse direction by nearly the same amount, materials are surely removed from the workpiece surface 9 substantially uniformly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for removing material from a product being processed (hereinafter referred to as a "workpiece"), and more particularly to a tool for performing clamping in a hand-held machine tool.

[0002]

BACKGROUND OF THE INVENTION Tools of the type mentioned at the outset have been used to modify the shape and / or surface of workpieces of various materials, not only in the manufacturing industry, but also in workshops, especially in manual work, and also in so-called home hobbies. Used to process.

In such a material removing tool, since the structure of the tool main body is hard, it is often difficult to remove the material uniformly even if a slight movement of the tool acts on the tool. Occur.

[0004] If the tool is slightly tilted, the set angle between the tool and the work piece changes, and the surface of the work piece may be damaged or defective. Thus, when such tools are clamped to hand-held or hand-guided machine tools, it is often very difficult and time-consuming to treat the surface of the workpiece with constant quality.

When processing substantially flat surfaces, such as plates and sheet metal, using a hand-held machine tool, the contact area of the processing surface of the tool provided for material removal is substantially reduced on the workpiece. It is often difficult to guide completely uniformly while applying a constant force to the body.

[0006] The higher the requirements on the quality and accuracy of the surface to be treated, the more the accuracy of the hand guided to the machine tool can be impaired.

[0007] Frequently, post-processing is required to eliminate errors introduced to the surface of the workpiece, which is also time consuming and adds cost. If the error is too large, flaws remain, which can significantly reduce the value of the workpiece.

Further, when grinding a cylindrical surface, such as a borehole or other borehole, from the inside, there is a possibility that a given type of tool that fits the cylindrical surface may tilt due to slight accidental movement. is there. For example, when removing material from a flat surface, the tool clamped on the machine tool may make a slight contact with the wall that borders the side of the surface, causing the tool to tilt or jam and become stuck. Or, as a result, the tool may even come off the chuck of the machine tool.

[0009] Depending on the nature of the tool and the workpiece to be processed, even a small disturbance to the tool can considerably damage the workpiece or even the tool itself.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to alleviate the aforementioned disadvantages, especially when using hand-held or hand-guided machine tools, and to ensure that the surface of the workpiece is substantially always of uniform quality. It is an object of the present invention to provide a tool of the kind described above, which enables efficient material removal treatment and which can be used for treating a very wide variety of surfaces.

[0011]

SUMMARY OF THE INVENTION The present invention comprises a substantially radially symmetric tool body on which material removal means is mounted on its outer periphery, and a concentric drive for transmitting torque to the outer peripheral surface of the tool body. This is achieved by a tool for material removal of a workpiece having a shaft or a receiving part for receiving the concentric drive shaft. This outer peripheral surface can be inclined relative to the drive shaft, in particular in a self-adjusting manner.

[0012] A cylindrical of the type described above with a rotating treatment surface which can be inclined relative to the drive shaft, in particular self-resetting, and which can be rotated for material removal. The tool of construction ensures a contact area that extends over substantially the entire width of the tool, even if the concentric drive shaft is slightly tilted, and thus can remove material from the surface of the workpiece very uniformly. This substantially uniform processing quality is achieved, and the work piece surface can be processed significantly faster and cost-effectively since less post-processing is otherwise required. Becomes

[0013] Since the tool body is cylindrical, the dimensions of the tool body can be easily adjusted to fit a flat, cylindrical, bent, and / or curved surface, so that the tool of the present invention can be used depending on the application. Can be used.

Surprisingly, it has been found that the tool according to the invention produces considerably less dust when compared to similar grinding machines. The removed material is not substantially scattered around by centrifugal force and generally substantially remains on or accumulates on the tool surface.

In a particularly preferred embodiment of the tool according to the invention,
The outer cap is held on the hub by a spoke-like or disc-like coupling device such that its edge region is axially cantilever-like in construction.

The coupling ensures that the predetermined diameter of the cap is maintained, so that the moment transmitted to the tool is reproduced substantially uniformly in the cap, as in the case of wheels and tires. If the zone of the edge region is forced to deform radially, it also acts on the adjacent edge region as the cap rotates, and the axially facing edge region zone deforms in the opposite direction, so the cap is A local tilt around the coupling device will ensure a contact area over substantially the entire width of the cap.

In another advantageous embodiment, the tool can further absorb shear and torsional forces if the coupling device is of a structure that can be deformed in a self-adjustable manner. Since the tool is held in this way so that it can be displaced or deformable both axially and radially, so that it can re-adjust itself,
The tool can absorb a slight, but rapid, sway or transmit it to an area outside the tool's contact area.

In a preferred development, the formation of a groove or pyramid extending around the outer peripheral surface improves the adhesion and self-centering of the processing medium stretched around the outer peripheral surface since the tool rotates. I do. Thus, the need for additional fastening means known per se to those skilled in the art is greatly reduced.

Further, since there is a groove, an air cushion is formed between the tool body and the stretched processing medium,
Undesired overheating of the processing surface, which could result in defects on the workpiece surface or overstress the tool as a result of the rotating material removal process, is prevented.

In one embodiment of the tool according to the invention, in particular in a material- and cost-saving embodiment, a one-piece tool body, preferably manufactured by injection molding from a plastic material, has proven to be particularly practical and advantageous.

In another aspect, the invention relates to a tool body, also referred to as a carrier, which receives abrasive means, particularly in an annular or sleeve-shaped backing, the tool body being made of a soft plastic or elastomer and having at least one end on at least one end of the body. It is characterized in that two steel edges are mounted or incorporated and at the same time act as anti-wear means for the carrier and as lateral guide means for the polishing means.

[0022] In particular, the tool body is a steel body in which the anti-wear means for the tool body and the lateral guide means for the polishing means are simultaneously loosely fitted at the second end.
It is characterized by being made of a disc.

An embodiment of the tool body in which the polishing means can be easily replaced by axial displacement after use is particularly advantageous.

[0024] Even if the steel rim is assembled,
The tool body is still flexible, so that the polishing means can adapt to the surface to be treated.

The invention will now be described by way of a preferred embodiment illustrated in the accompanying drawings.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference is now made to FIGS. 1, 2, and 3 which show an embodiment of the tool of the present invention made as one piece by injection molding. However, it should be noted that for the sake of clarity, the correct dimensions are not illustrated.

The tool of the present invention has a cylindrical cap 1,
The outer peripheral surface forms a surface for receiving the material removing means 10 fixed thereto, such as an abrasive or abrasive paper.

The cap 1 is provided by a disk 2 which is integral with the cap 1 and a receptacle for the hub 3 of the drive shaft 4 shown in dashed lines in FIGS. 2 and 3 (only schematically shown). ) Is held.

The hub shown schematically can preferably be equipped with a quick connection of the German utility model DE G 94 16 005.8, the entire contents of which are incorporated herein by reference. In this case, the tool according to the invention also comprises a corresponding joint which is arranged substantially concentrically with the axis of rotation at the center of gravity of the tool.

The outer peripheral surface 5 of the cap 1 is provided with a groove 6 which extends around the cap and extends around the outer peripheral surface 5 when the tool rotates. Ensures good adhesion and self-centering of the processing medium. As can be seen in particular in FIG. 3, the disc 2 has a hollow cylindrical shape so that the rotating edge regions 1a and 1b of the cap have a cantilever-like structure and are easily bent radially. Provided at the center of the cap 1.

Although the disk 2 has relatively high rigidity in the radial direction, a through-hole 7 is provided in a circle surrounding the hub 3 in order to increase the axial flexibility of the disk.

Depending on the desired flexibility of the edge areas 1a, 1b and the disc 2, their thickness dimensions can be determined in advance depending on the material used, the intended use, and the diameter and width 8 of the tool. .

When torque is transmitted from the machine tool (not shown) to the tool via the drive shaft 4 held concentrically on the hub 3, the resulting force is transmitted to the cap 1 via the disk 2, Although the radial compression of the cap 1 is prevented by the radial rigidity of the disc 2,
Embodiments of the present invention allow for elastic retraction.

Since the cap 1 is rotatable, the edge areas 1a and 1b are resiliently held in place when a force is applied to the tool, and the contact area is the area of the tool that contacts the workpiece surface 9. The area extends over the entire width 8 of the cap 1. Next, this operation will be described in detail.

For example, when the drive shaft 4 shown in FIG. 3 is rotated off the axis x of the tool because the machine tool is slightly inclined in the direction of arrow C, the force transmitted to the tool changes, and And in particular, the outer peripheral surface thereof is inclined.

The edge region 1a in contact with the workpiece surface 9 deforms in the direction of the arrow V1. Due to the presence of the disc 2 there is more radial stability and the cap 1 is rotatable, so that the deformation in the direction V1 also acts on the adjacent edge area, and the edge area 1a Are deformed V2 in the opposite direction by approximately the same amount as the edge region 1a, thereby ensuring substantially uniform material removal from the workpiece surface 9.

The forced deformation V1 on one side and the consequently opposite deformation V1 or V2 of the edge region result in a local inclination of the edge region in a plane about the axis Y of the disk. To ensure that the contact area further extends substantially over the entire width 8 of the cap 1.

When the tool is deformed, the restoring force generated on the rotating body due to the material and the special form further reliably prevents the cap 1 from being distorted. Further, when the drive shaft 4 rotates back to the axis X of the tool, the deformation that the edge regions 1a and 1b of the cap 1 return to the initial stable state is secured. The rotation of the drive shaft 4 in the opposite direction results in a corresponding, opposite deformation of the edge regions 1a and 1b.

When a compressive strain occurs in the axial direction due to, for example, the end of the tool colliding with the wall, the arrow E
Force acts on the tool. If a further force D acts on the tool in the opposite direction, the tool will not immediately tilt or get stuck, and the compressive strain will be reduced by the arrow V3 or V4.
, In the direction of, can be absorbed by the disk 2 which is configured to be axially flexible.

In general, forces acting in the radial direction are also generated, so that the local inclination of the edge regions 1a and 1b simultaneously and locally, in the same or exactly the same way as the deformation of these edge regions described above. Thus, a contact surface extending over the entire width of the tool is ensured.

It is within the scope of the present invention to include structures such as fabrics and fibers as well as radial tires to reinforce the rotating outer peripheral surface.

Furthermore, without using a carrier medium or carrier paper,
The plastic or the adhesive may directly hold the material removing medium such as corundum or sand on the outer peripheral surface.

Further, the disk 2 may have a diaphragm-like structure to increase elasticity, and may have a waveform running in the radial direction.

According to the present invention, the drive shaft 4 for transmitting the torque to the tool is provided on one side of the machine tool and the shaft 4.
Tool can be clamped on both sides of the machine tool as it extends through the machine tool, so that the tool of the present invention can be mounted on a machine tool of the hand-held or hand-guided type, either automatically or fixedly. It can be widely applied to any type of machine tool.

In another embodiment of the present invention, as shown in FIG. 4, for example, a rubber, a resilient polymer, etc.
The outer peripheral surface 5 can be made outside the cylinder of elastic solid material. Cylinder 11 can include further elements therein so that a clearly defined deformation occurs or a clearly defined restoring force is obtained.

A belt 12 is buried in a preferable manner so as to extend around the outer peripheral surface 3 of the cylinder 11. The belt 12 may be made of steel, plastic, or a cloth of nylon or Kevlar, and should preferably be made elastic so as to further allow the outer peripheral surface 5 to be deformed. A particularly preferred embodiment includes a steel belt 12 that is vulcanized in a rubber cylinder 11.

In the embodiment shown in FIG. 4, a lateral guide disk 13 is further provided, which has a plate-like transverse cross-sectional shape and has a band in which the material removing means 10 is provided. 14 form an axial transverse stop. This guide disc 13 can be fixed in a single fixing step with the quick coupling described above when the tool is mounted on the drive shaft 4.

Furthermore, the cylinder 11 facing the guide disc 13 can define a radially extending resilient stopper shoulder 15 which forms a further lateral stop for the band 14.

To reinforce the stopper shoulder 15, a flat ring 16 can be mounted on or in the cylinder 11, which ring is held resilient in the radial direction, but has a large axial lateral force. Can be absorbed.

[Brief description of the drawings]

FIG. 1 is a top plan view of a preferred embodiment of the present invention.

FIG. 2 is a side view of the embodiment shown in FIG.

FIG. 3 shows a cross section along the line BB of the embodiment shown in FIG. 1;

FIG. 4 shows a cross section of another embodiment along the line BB shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cap 2 Disk 3 Hub 4 Drive shaft 5 Outer peripheral surface

Claims (14)

[Claims] 1. A tool for performing a material removing process on a workpiece, comprising a substantially radially symmetric tool body, wherein a material removing means is mounted on an outer peripheral surface of the tool body. Has a concentric drive shaft for transmitting torque to the outer peripheral surface of the tool body, or has a receiving portion for the concentric drive shaft, and has the outer peripheral surface relative to the drive shaft. A tool characterized in that it can be tilted, in particular self-adjustable. 2. The tool body includes an outer cylindrical cap, a hub, and a device for connecting the cap to the hub, the edge area of the cap being axially cantilevered. The tool according to claim 1, wherein the tool has a structure. 3. The tool according to claim 2, wherein the device for coupling the cap to the hub is configured substantially in the form of a disk and / or a spoke. 4. The tool according to claim 2, wherein the device for coupling the cap to the hub is deformable in an axially self-resetting manner. 5. The tool according to claim 1, further comprising a groove or a pyramid extending around the outer peripheral surface. 6. The tool according to claim 1, wherein said tool body comprises a single member. 7. The tool according to claim 1, wherein the tool body is made of a resilient plastic. 8. The tool according to claim 1, wherein the device for coupling the cap to the hub is radially self-resetting. 9. The tool according to claim 7, wherein the tool body is configured as a substantially resilient cylinder, and a belt surrounding the tool body is embedded in the tool body. 10. The tool according to claim 1, further comprising at least one lateral guide disc. 11. A tool body for receiving abrasive means, particularly in the form of an annular or sleeve-shaped backing, said body being made of soft plastic or elastomer, with a steel rim attached to at least one end of said body. A tool body characterized in that it acts as a means for preventing wear of the tool body and also as a lateral guide means for the polishing means. 12. A steel disc inserted loosely at said second end, said anti-wear means for said tool body and lateral guide means for said polishing means being formed. Item 14. The tool body according to Item 13. 13. The tool body according to claim 11, wherein said polishing means can be easily replaced by being displaced in an axial direction after use. 14. The tool body, characterized in that the tool body is fitted with a steel rim, but still has the flexibility to allow the polishing means to adapt to the surface to be treated. 12. The tool body according to 11.