BG1689U1 - Abrasive ring - Google Patents

Abstract

The abrasive ring is used for grinding and polishing of metal, wood, plastic, stone, glass. It achieves uniform grinding/polishing of the treated surfaces, the vibrations of the tool are avoided and safe operation of the operator is ensured. The abrasive ring consists of a base on which number of lamellas (2) are attached. The lamellas are from abrasive and they are arranged in a continuous row, while each lamella (2) is partially overlapped by the next one. According to the useful model, the base is a tubular element (1) along whose entire periphery the lamellas (2) are attached in the shapeof a parallelogram, positioned at an angle from 6 to 12 degrees relative to the central axis (4) of the tubular element (1), while the two ends of each lamella (2) are levelled with the upper, respectively the lower edge of the tubular element (1). The tubular element is made of paperboard or plastic or metal alloy. The abrasive material of the lamellas (2) is sandpaper or nonwoven textile with abrasive or felt.

Description

Technical field

The utility model refers to an abrasive ring for grinding and polishing metal, wood, plastic, stone, glass.

BACKGROUND OF THE INVENTION

EP 0 826 462 B1 discloses a grinding disc consisting of a support composed of a disc-shaped base, on the circumference of which a radially support ring is located. A plurality of abrasive blades are mounted on the entire periphery of the support ring, arranged in an axial direction with respect to the central axis of the tool and in a continuous order, with each rectangular blades partially overlapping from the next. The two ends of the slats are located outside the width of the base. The slats are secured to the support ring by an adhesive epoxy resin.

This well-known grinding tool has a sophisticated base structure that fixes the diameter and width of the disc. The center hole allows only one type of hand-held power tool to operate, and the tool's scope is limited to the areas within the range of the power tool. Tool assembly and disassembly are slow and require additional tools. The two ends of the slats, which are located beyond the width of the base, can bend in the process of work, resulting in a change in planar grinding into an arcuate. Due to the alignment of the slats in the axial direction with respect to the central axis, the work surface moves along the vertices of the polygon in the process of operation and the edges of the slats come into contact with the workpiece surface, which results in vibrations. In the case of working with a hand-held power tool, vibrations are detrimental to the health of the operator, and if soft material (plastic, non-ferrous metals, wood) is machined, traces of a "zebra effect" perpendicular to the machine travel remain on the workpiece.

The technical nature of the utility model

The utility of the utility model is to create an abrasive grinding or polishing ring that ensures uniform grinding / polishing of the machined surfaces, without vibration, with quick assembly / disassembly without the use of additional tools, and with a wide range of applications .

This task is accomplished by an abrasive grinding ring consisting of a base on which a plurality of abrasive lamellae are arranged by adhesive, arranged in a continuous order, each lamella partially covered by the next. According to a useful model, the base is a tubular element, on which the parallel-shaped lamellae are arranged on the entire periphery, at an alpha angle of 6 ° to 12 ° with respect to the central axis of the tubular element. The two ends of each lamellae are flush with the upper or lower edges of the tubular element, respectively.

The tubular element is made of cardboard or plastic or metal alloy.

The cardboard may be impregnated with resin.

The abrasive material from which the slats are made is sandpaper or non-woven fabric with abrasive or felt.

The adhesive used to attach the slats to the base is polyurethane or resin.

The advantages of the abrasive ring according to the utility model are as follows. Due to the wide variety of sizes and types of abrasives, the abrasive ring has a wide field of application - flat grinding / polishing; channel grinding / polishing; internal grinding / polishing of pipes and openings, etc. The positioning of the slats on the periphery of the tubular element at an angle to its central axis ensures a gradual, smooth contact of each of the slats in contact with the workpiece surface in the work process, thereby achieving a uniform grinding / polishing of the workable surfaces, avoiding vibrations of the tool and ensure safe operation of the operator. The inclination of the slats with respect to the central axis of the base reduces the contact area, respectively increases the pressure at a given force and improves the mode of operation of the abrasive grain. This leads to an increase in productivity, namely to increase the amount of material taken away. The lack of

1689 Ul blow during work extends the life of the sanding slats, which in turn extends the life of the abrasive ring itself. Changing the tool is easy and quick - with insertion, respectively, pulling from the holder, so no additional tools are needed. The use of a tubular element as a tool base provides flexibility in production, since different widths of tubular elements of a certain diameter can be obtained from a single cylindrical billet. The polyurethane adhesive used to attach the slats to the tube element is flexible and is not greatly affected by changes in temperature and humidity, which prolongs the tool life and does not require special storage conditions. The use of cardboard or metal for the manufacture of the pipe element solves the environmental problem associated with the easier recovery of the waste from the spent instruments.

Explanation of the annexed figures

Figure 1 is a perspective view of an abrasive ring according to the utility model;

Figure 2 is a side view of a portion of an abrasive ring with lamellae arranged thereon;

3 is a section through AA of FIG. 2;

4 is a segment b-b of FIG. 3 enlarged;

Figure 5 is a side view in partial section of the abrasive ring according to the utility model.

Examples of implementation of the utility model

The utility model is illustrated by the following example, which does not limit it.

1-5 shows an abrasive grinding / polishing disk consisting of a base which is a cylindrical tube element 1, on which a plurality of lamellae 2 of abrasive material are secured by an adhesive polyurethane. The lamellae 2 are in parallel shape and are arranged in a continuous order, with each lamellae 2 partially overlapped by the next. The lamellae 2 have a solid support in their entire rear surface, such as

1/3 of each louver 2 lies on the tube element 1, and 1/3 of it lays tightly on the adjacent louvre. The lamellae 2 are arranged at an alpha angle of 6 ° to 12 ° with respect to the central axis 4 of the cylindrical tube element 1 (Fig. 5), and the two ends of each of the lamellae 2 are arranged on a level with the upper or lower edges of the tube element, respectively. 1. A rubber expander roll 3 of standard type is housed in the inner volume of the tubular member 1.

Each of the slats 2 has a length L = 15 h30 mm.

The abrasive disc can be in size from 0 50 to 0 300 mm with width from 25 to 1500 mm.

The skin may be different in appearance and size, for example from AYX, SiC, Ceramics, Aggregate and the like.

The slats 2 can be made of non-woven fabric with abrasive or felt.

Using the utility model

According to the utility model, the abrasive ring can be mounted on a hand-held power tool or on a stationary machine and can be used both for rough grinding with a large amount of material from the surface being treated and for fine processing, including polishing. Due to the wide variety of sizes and types of abrasive or felt, the abrasive ring has a wide field of application - flat grinding / polishing; channel grinding / polishing; internal grinding / polishing of pipes and openings, etc.

To avoid vibration during operation of the abrasive ring, the angle of inclination of the slats 2 is calculated by the formula:

L, <b tg alpha alpha> arctg L _] b where L is the length of the working part of each of the slats; B - the width of the tube element; alpha - the angle of inclination of the slats with respect to the central axis of the tube element.

At min values of C = 5 and b = 25: alpha> 11.3 ° alpha = 12 °.

To provide a uniform working area of one or a maximum of 2 points of contact with a maximum width b = 100 mm and a maximum ra4

1689 Ul botched lamella width 10 mm alpha> 5.7 °, alpha = 6 °.

For simultaneous compliance with the vibration-free condition and uniform work surface of the slats 6 ° <alpha <12 °.

The abrasive ring is mounted on the propulsion machine by means of a standard holder - rubber expansion roller 3. The tool is suitable for internal / external surface treatment of metal, wood, plastic, stone, glass, depending on the abrasive or felt used in its production and dimensions. When working with the tool, a gradual, smooth contact of each of the slats in contact with the surface of the workpiece is observed, which achieves a uniform grinding / polishing of the work surfaces, the vibration of the tool is avoided, especially with coarse abrasive edges, wear evenly, which in turn extends the life of the abrasive ring. Due to the way the slats are tilted, no impact is observed and the operator is safe to operate.

Claims (5)

Claims An abrasive ring consisting of a base on which a plurality of lamellae (2) of abrasive material, arranged in a continuous order, are attached by adhesive, and each lamellae (2) is partially overlapped by the following, characterized in that the base represents a tubular element (1), on the whole circumference of which the lamellae (2) are attached, in the form of a parallel, arranged at an angle of 6 to 12 ° with respect to the central axis (4) of the tubular element (1), the two ends of each of The slats (2) are flush with the upper or lower edges of the tubular element (1). Abrasive ring according to claim 1, characterized in that the tube element (1) is made of cardboard or plastic or a metal alloy. Abrasive ring according to claims 1 and 2, characterized in that the cardboard is resin impregnated. Abrasive ring according to claim 1, characterized in that the abrasive material of which the slats (2) is made is sandpaper or non-woven fabric with an abrasive or felt. Abrasive ring according to claim 1, characterized in that the adhesive is polyurethane or resin.