Tool for removing a burr from the outside of cylindrical workpieces

Abstract

The basic body (1) of Figure 2 is characterized in that it can be made of plastic or metal.

Description

[0001] There are many different tools on the reloading accessories market for deburring sharp-edged and trimmed cartridge cases. Unfortunately, most of them deliver unsatisfactory results after deburring the cartridge cases. Either the burr wasn't removed cleanly or it was simply bent. This is because almost all tools don't "cut" but simply remove the burr by "scraping" or "rubbing." Furthermore, the time required to achieve a less than satisfactory result with such a "rubbing" or "scraping" tool is relatively high.

[0002] This invention is based on the problem of creating a tool that quickly, evenly, and residue-freely removes the burr on the outer cartridge case mouth of trimmed or sharp-edged calibrated cartridge cases with minimal effort. It is easy to handle, prevents operating errors, and is available to the general public among reloaders. Furthermore, this invention should be easy to retrofit as an accessory to most common case processing stations and all cordless screwdrivers, or to conventional screwdrivers with bit attachments, without any modifications.

[0003] The external deburrer is equipped with three standard indexable inserts that permanently ensure the cutting function. They are arranged at a 120° angle to each other, thus ensuring consistent and self-centering contact with the cutting edges. The indexable inserts are relatively inexpensive compared to their extremely long service life and can be rotated three times before needing to be replaced.

[0004] The external deburrer for cartridge cases is suitable for all calibers from .22 to .50.

[0005] Thanks to its innovative design, the external deburrer features an automatic chip ejection system that uses centrifugal force to expel chips outward or downward through openings behind and below the indexable inserts during operation. This prevents the indexable inserts from clogging. Chip ejection also improves with increasing speed.

[0006] An embodiment of the invention is described with reference to Fig. 1 to 3. It shows: Fig. 1: Assembling the external deburrer Fig. 2: Exploded view of the individual parts Fig. 3: Application with sleeve

[0007] This external deburrer, in Fig. 1, works both purely mechanically in conjunction with a screwdriver with bit attachment or electro-mechanically in conjunction with a cordless screwdriver or a sleeve processing station.

[0008] In Fig. Figure 2 shows the structure and assembly of the individual parts.

[0009] The external deburrer (1) can be made of plastic or metal. With the plastic version, the four threaded sleeves (2, 5) must be subsequently melted or injected as inserts using the plastic injection molding process. With the metal version, thread inserts are not necessary, as the threads are cut directly into the metal body. The three indexable inserts (6) are screwed into the designated thread inserts (5) using the three screws (7) or, in the metal version, into the threads.

[0010] The base body is recessed (8) so that the indexable inserts (6) can be automatically screwed in at the correct angle, preventing them from twisting during operation after installation. One of the two adapters (3, 4) can then be screwed into the base.

[0011] In Fig. Figure 3 shows an example section to explain the function during operation.

[0012] The uneven or sharp-edged trimmed sleeves (10) are pressed lightly and briefly from above onto the rotating indexable inserts (6), removing the burr quickly and cleanly. Upon first contact (11) of the sleeve (10) with the indexable inserts (6), it automatically centers itself via the 3-point support (11) at a 120° angle on the cutting edges of the indexable inserts (6), ensuring perfect guidance.

[0013] On average Fig. 3 shows the end position of the threaded insert (2) in the base body (1) and the adapters (3, 4) mounted therein.

[0014] Reference numeral (13) indicates the specially designed shape of the base body, which serves to eject chips. The arrow indicates the ejection direction. List of reference symbols: 1 base body made of plastic or metal 2 threaded inserts for adapters 3 bit adapters for screwdriver bit attachment / cordless screwdriver chuck 4 adapters for sleeve processing stations 5 thread inserts for screws 6 indexable inserts 7 screws 8 Recess in the base body for self-alignment of the indexable inserts (6) 10 Sleeve to be deburred 11 Self-centering 3-point support of the sleeve on the indexable inserts (6) 12 Mounting the adapters (3, 4) in the threaded insert for adapters (2) 13 Shaped cavity for chip ejection, ejection direction

Claims

[1] Basic body (1) Fig. 2 is characterized by that it can be made of plastic or metal. [2] Basic body (1) Fig. 2 is characterized by that threaded inserts (2, 5) are present if the body is made of plastic. For metal, the thread is cut directly into the base body (1). [3] Adapters (3, 4) Fig. 2 are characterized by that they are made of metal. [4] Basic body (1) Fig. 2 is characterized by that there are three threaded inserts (5) or threads in the metal base body. [5] Basic body (1) Fig. 2 is characterized by that a threaded insert (2) or a thread in the metal base body is present centrally in the base. [6] Basic body (1) Fig. 2 is characterized by that three indexable inserts (6) are arranged at a 120° angle to each other. [7] Basic body (1) Fig. 2 and indexable inserts (6) Fig. 2 are characterized by that they are connected by means of three screws (7). [8] Basic body (1) Fig. 2 is characterized by that recesses form a cavity (13) below the indexable inserts (6) Fig. 3, which leads laterally outwards along the indexable inserts (6). [9] Basic body (1) Fig. 2 is characterized by that there is a recess (8) in the area of ​​the indexable inserts (6). [10] Basic body (1) Fig. 2 is characterized by that the recess (8) accommodates the indexable inserts (6) in a form-fitting manner. [11] Basic body (1) Fig. 2 is characterized by that it is lower than the indexable inserts (6) in the sleeve machining area. [12] Basic body (1) Fig. 2 is characterized by that it protrudes beyond the indexable inserts in the outer area. [13] Bit adapter (3) Fig. 2 is characterized bythat it has a thread on one side, matching the base body (1) or threaded insert (2) and a standard bit hexagon on the other side. [14] Sleeve processing station adapter (3) Fig. 2 is characterized by that it has a thread on one side, suitable for the base body (1) or threaded insert (2) and on the other side a thread, suitable for most sleeve processing stations. [15] Basic body (1) Fig. 2 is characterized by that the sleeves to be machined (10) Fig. 3 due to the 120° angle always only a 3-point support (11) Fig. 3 on the cutting edges of the indexable inserts (6) Fig. 2 have.

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