JPS60228075A - Grinding tool for removing burr - Google Patents

Abstract

PURPOSE:To easily scrape down strong burr from a wall without damaging it, by using a brush material to restrain the freedom of flection of steel wires which are for removing the burr. CONSTITUTION:A metal member 30, to which a strong brush material 3 is tightly fitted, is wound on a core shaft 2. Steel wires 4 highly effective for burr removal are disposed on the core shaft 2 so that the steel wires 4 tightly enter into the brush material 3 when the steel wires are partly moved away from the core shaft 2. For that reason, the freedom of flection of the steel wires 4 is restrained by the brush material 3. A grinding tool for burr removal is thus constructed. When the rotating grinding tool is brought into contact with the inside surface of a large hole, even strong burr on the inside surface can be easily scraped down by the steel wires 4. Both the ends of the steel wires 4 are bundled and secured on the core shaft 2 by a fixing metal 1 and a fixing tube 13.

Description

[Detailed Description of the Invention] Purpose of the Invention The present invention provides a method for easily removing burrs attached to the inner surface of a metal product during cutting of the metal product, particularly drilling holes using a drill, etc. This invention relates to the improvement of tools that can grind the inner surface of metal products to create a beautiful finish.

Industrial Application Fields The same applies to cutting of wood and synthetic resin products, but this invention is particularly applicable to cutting of metal products such as metal castings, forgings, steel products, aluminum, and brass. The present invention relates to a tool that easily removes generated burrs from the product.

Prior Art As shown in Fig. 8, while rotating a tool A in which a wire B having a ridge line (for example, a piano wire with a triangular cross section) is bundled into a cylindrical shape, and the central part is bulged to give the steel wire BK elasticity. , inserted into a through hole of a metal product C, and a burr F generated by drilling process E on the wall of the hole,
A deburring grinding tool for removal from the hole wall surface has already been proposed by the present inventor. (Tokuko Showa 46-1
7877, Meeting 11[:148-39744Refer to each publication]However, these deburring tools are very effective in removing deburrs when the hole size is smaller than the size of the swell of wire rod group B of tool A. However, as shown in Fig. 9, if the hole H is considerably larger than the bulge of the steel wire rod group B, operate the tool A so that the steel wire rod B slides smoothly against the inner surface of the hole wall. Also, there was a problem that the steel wire B group escaped toward the side that did not contact the hole wall surface and the steel wire B single wire itself escaped (deflected), and a sufficient deburring and grinding effect could not be obtained.

Therefore, in order to eliminate such drawbacks, the present inventor proposed a method in which various types of fillers were applied to the cylindrical shape formed by the steel wire B group to reduce the complementarity of the steel wire B. (Jikko Sho 4
(See Publications No. 6-2876, No. 2877, and No. 47-26069) However, it was not very effective for strong objects such as steel banners.

Problems to be Solved by the Invention and Structure of the Invention This invention aims to minimize the complementarity of the steel wire B constituting such a conventional deburring tool, and to improve the grinding and polishing effects. A required number of steel wire rods with twisted ridges in a screw shape are arranged in a cylindrical shape around a core shaft, one end of the steel wire rods is fixed to the core shaft, and a rigid brush material is arranged around the core shaft in a cylindrical shape. Arrange the excellent wire rods on the cylindrical brush material so that the @ wire rods are floating above the core shaft, and then place the other end of the steel wire rods in the floating state on the core shaft again. The steel wire rod is supported by the cylindrical brush material and is supplementarily reinforced, making it possible to improve the strong deburring and grinding effect. As well,
The tip of the brush material that protrudes from between each steel wire rod is reinforced by each steel wire rod, which polishes the polished surface well and exhibits excellent deburring function as a tool for automatic deburring machines. Therefore, it was possible to use it as a tool.

In the first embodiment shown in FIG. 1 of the accompanying drawings, the deburring tool includes a rotating part mounting fixture 1, a core shaft 2, and the core shaft 2.
It is made up of a brush material 3 wound around the brush material 3, and four groups of steel wire rods arranged in a cylindrical shape around the brush material 3.

The wire rod 4, which is mainly used for deburring and grinding, is made of a material such as piano powder and has a triangular cross section as shown in FIG. Of course, the steel wire rod 4 is not limited to one having a triangular cross section as shown in the figure, but may have a square or pentagonal cross section as well.
It is fine as long as it has a ridge line that has a grinding action similar to that of 0, but it goes without saying that if the ridge line has a polygonal shape that is too obtuse, the grinding effect will be reduced accordingly.

In order to allow the steel wire rod 40 to bend freely in any angle, the steel wire rod 40 is twisted as shown in FIG. 5, and the ridge line 40 is formed into a screw shape. A required number of the steel wire strips 40 thus formed are arranged in a cylindrical shape around the core shaft 2 as shown in FIG. 1, and one end thereof is fixed 10.

This fixed part 10 is a part similar to the part shown on the right side of Fig. 8.9, and is arranged around the core shaft 2 and around it as shown in Fig. A blind hole 11 of a size that can be inserted together with the four groups of steel wire rods prepared is formed at the end of the fixing metal fitting 1, and the blind hole mouth edge (portion with the same reference numeral as the fixed part 10) of the fixing metal fitting 1 is compressed and reduced. A structure is shown in which a core shaft 2 inserted into a blind hole 11 and four groups of steel wire rods are fixed 10 in the blind hole 11. A thin shaft 12 is formed on the side opposite to the blind hole 11 side of the fixing fitting 1, and the thin shaft 12 is attached to a suitable rotation mechanism,
The tool is rotated for use.

The tips of the four groups of steel wire rods are also gathered at the tip of the core shaft 2, and a fixing tube 16 is fitted thereon, and the fixing tube 13 is compressed and reduced to fix the tips of the steel wire rods 4 to the core shaft 2. Before doing this, in order to give a bulge to the middle part of the 4 groups of steel wire rods arranged on the core shaft 2, a brush material 5 is wound around the core shaft 2, and each steel wire material 4 is arranged around the brush material 3-H. .

The brush material 6 is a trap, as shown in FIG. The material 6 is a particularly strong wire or a synthetic resin wire such as nylon having a diameter of 0.5 Wm or more, and a metal fitting 60 densely planted with such a strong brush material 6 is wrapped around the core @2, and then K
When the f14m material 4 is arranged, the steel wire 4 will be difficult to enter into the brush material 6, that is, the free complementation of the steel wire 4 will be restricted by the brush material 6, and this action will cause strong adhesion of burrs. However, it can be easily scraped off. At the same time, the tip of the brush material 3 protruding from between the steel wire rods 4 also scrapes the machined surface, and depending on the material of the brush material 5, the machined surface can be beautifully polished and ground.

Needless to say, if it is desired to improve the polishing and grinding properties, the brush material 3 may be made of a synthetic resin wire mixed with abrasive grains. .

Effects of the Invention As described above, since the steel wire rod 4, which has excellent deburring effect, is restricted in its free complementarity by the brush material 3, the tool of the present invention is rotated, and as shown in FIG. Even strong burrs that are applied to the wall of the hole H and adhere to the wall can be easily scraped off. However, the elasticity of the steel wire 40 does not have the power to scrape off the hole wall like a file. This means that metal products with extremely high precision can be obtained without damaging the metal.

In the second embodiment shown in FIG. 2, instead of the brush material 5 in the previous example, the brush material 5 is arranged in a cylindrical shape, and the brush material 5 is held between four VC twisted wire materials 6 as shown in FIG. The core shaft in this example is the twisted wire rod 6, which is interposed between the steel wire rods 4, 4, . It goes without saying that the brush material 5 in this example is similar to the brush material 3 in the previous example.

In the case of this example, since the shape can be formed into a small size, it has the advantage that it can be used as a tool suitable for grinding to remove small holes.

A third embodiment shown in FIG. 3 uses a core shaft 7 corresponding to the core shaft 2 in the first embodiment as a tube, and a steel plate formed at the tip of the tube shaft 7 in the same manner as in the first embodiment. The bundled tips of the four groups of wire rods are inserted, and the tip 70 of the tube shaft 7 is compressed and contracted to fix the four groups of steel wire rods to the tip 70 of the tube shaft. Therefore, the tip of the tool is made of elastic material of the four groups of steel wire rods. It is a curved aggregate, which is effective in deburring and grinding without damaging the inner end surface of the blind hole.

[Brief explanation of drawings]

The attached drawings show an embodiment of the deburring and grinding tool of the present invention,
1 is a partially broken side view of the first embodiment, FIG. 2 is a partially broken side view of the second embodiment, FIG. 3 is a partially broken side view of the third embodiment, and FIG. The figure is a perspective view of the steel wire rod, Fig. 5 is a side view of the same twisted form, Fig. 6 is a perspective view of the brush material, Fig. 7 is a perspective view of the same side form, and Fig. 8.9 is a side view of the twisted form. FIG. 3 is a partially cut side view showing a deburring and grinding mode using a tool. 1 is a fixing fitting, 2 is a core shaft, 3.5 is a brush material, 4, B is a steel wire material, 6 is a twisted wire material, 7 is a tube shaft, 10 is a compression fixing part, 11 is a blind hole, 13 is a fixing tube , 30 is a U-shaped cross-section clamping fitting, 40 is the ridgeline of the steel wire 4, C is a metal product, D is a small hole,
H is a large hole, F is a large hole.

Claims (1)

[Claims] A required number of steel wire rods whose ridges are twisted in a screw-like manner are arranged in a cylindrical shape around a core shaft, and one end of the steel wire rods is fixed to the core shaft. A rigid brush material is arranged in a cylindrical shape around the core shaft, and the steel wire material is arranged on the cylindrical brush material so that the steel and the wire material are raised from the core shaft. A deburring grinding tool in which the other raised end of the steel wire rod is again focused and fixed on the core axis.