JPH03213275A - elastic polishing tool - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an elastic polishing tool, and particularly to an elastic polishing tool that is effective for polishing irregularly shaped workpieces such as molds.

(Conventional technology) In molds used for forging, die casting, plastic molding, etc., the condition of the mold surface not only changes the shape accuracy and skin gloss of the molded product, but also affects productivity. effect. Therefore, these molds are generally polished as a final step in the manufacturing process.

There are various types of polishing tools, but
One type of such tools is a polishing tool shown in FIGS. 5 and 6.

The polishing tool (la) shown in Fig. 5 is a rod (2).
Attach abrasive paper (3) to the tip of the tool body (4).
A built-in vibrator gives vibration in the direction of arrow (5), and its horizontal component (6) vibrates the workpiece (7) such as a mold.
).

In addition, the polishing tool (tb) shown in Fig. 6 has a rod (2
) A polishing paper (3) is wrapped around the tip or a grindstone is attached to the tip to apply rotational vibration to polish the workpiece.

However, these polishing tools (la) and (lb) are
As shown in Figures 7 (a) and (b) for the polishing tool (la), the polishing tool (la) does not blend sufficiently at the corners or curved surfaces of the workpiece (7), resulting in point contact, causing localized stress concentration and deep polishing. Easy to get scratches. In addition, the polishing becomes clogged quickly and requires frequent replacement of the abrasive paper (3) or dressing in the case of a grindstone, which takes time for polishing.

Furthermore, the polishing tool (lc) shown in FIG.
) also has the same problems as the polishing tools (la) and (lb), as shown in FIGS. 9(a) and (b).

(Problems to be Solved by the Invention) As mentioned above, conventional polishing tools for workpieces such as molds do not sufficiently blend at corners or curved surfaces of the workpiece, resulting in point contact, which causes localized stress. It is easy to concentrate and cause deep wounds. In addition, there are other problems such as the grinding paper becoming clogged quickly and requiring frequent replacement of the abrasive paper or dressing of the grindstone.

This invention was made in view of the above problems, and
To provide an inexpensive polishing tool capable of polishing an arbitrarily shaped surface smoothly without damaging it without being restricted by the shape of a workpiece, without the need for dressing, and in a short time.

[Structure of the invention (Means for solving the problem) The polishing tool is an elastic polishing tool, and the elastic polishing tool is made of abrasive grains with a particle size of 10 to 80 μm using at least one of natural rubber or synthetic rubber as a binder. It was constructed by combining.

(Function) As described above, if an elastic polishing tool is made by binding abrasive grains using an elastic body as a binder, the shape of the polishing tool can be easily molded to match the shape of the workpiece, and the polishing tool can be shaped into the shape of the workpiece. By making surface contact in accordance with the above method, it is possible to alleviate the local stress concentration that occurs with conventional polishing tools. In addition, since the elastic body is used as a binder, when the polishing tool is pressed against the workpiece, the protruding abrasive grains sink into the binder, and due to the relaxation of the local stress concentration and the penetration of the abrasive grains, It can be brushed smoothly to avoid deep scratches. Moreover, when the elastic body is used as the binder, the binder is appropriately scraped off and no clogging occurs, and therefore, no dressing is required.

(Example) Hereinafter, the present invention will be described based on an example with reference to the drawings.

FIG. 1 shows an elastic polishing tool that is an embodiment of the present invention. This elastic polishing tool (10) uses at least one elastic material such as natural rubber, silicone rubber, or urethane rubber as a binder, and is made of at least one material such as A 1203 + SI C, BN, or diamond, and has a particle size of 10 to 10. 80
It is formed into a block shape by bonding μm abrasive grains. The hardness of the elastic body as a binder is 50 to 8011s for workpieces made of soft materials such as aluminum.
Approximately 60 to 80 Hs is appropriate for various steel materials.

When using this polishing tool, as shown in Fig. 2 (a) to e), the polishing tool has a tabular surface (lla) and a convex surface (l
lb), concave surface (lie), etc., to suit the shape of the workpiece. Since the binder is a rubber elastic body, the molding can be easily performed using a cutter knife or the like.

For example, as shown in Figure 3(a), an arcuate concave surface (12
When polishing a), use a polishing tool (1
0) to the workpiece (7) and polish it. Also, Figure 3 (
When polishing the arc-shaped convex surface (12b) as shown in FIG. Work (7
) and polish.

Therefore, when an elastic polishing tool (10) made of an elastic binder is used, it will elastically deform to follow the shape of the workpiece (7), come into surface contact with the workpiece (7), and alleviate local stress concentration. do. Further, as shown in Fig. 4(a), the abrasive grains (13) protrude from the binder (14) by a height hl to form a cutting edge, but as shown in Fig. 4(b), this polishing tool (10) is pressed against the workpiece (7), the binder (14)
) is an elastic body, so the abrasive grains (13) are bonded to the binder (1
4) Climb inside and protrude height is h2 (h2 < h
l), the local stress concentration is relaxed and the binder (
14) By penetrating the abrasive grains (13) into the inner pot, it is possible to polish smoothly without causing deep scratches, and it is possible to perform polishing with good shape accuracy.

Furthermore, as the abrasive grains (13) fall off during the polishing process,
Since the binder (14) is also appropriately scraped off and new cutting edges are constantly generated, there is no need for dressing, and an inexpensive polishing tool that can perform polishing in a short time can be obtained.

The elastic polishing tool of this example can be used not only for manual polishing of a workpiece, but also for automatic polishing by attaching it to a robot or the like.

[Effect of the invention] When an elastic polishing tool is made by binding abrasive grains with a particle size of 10 to 80 μm using at least one type of natural rubber or synthetic rubber as a binder, since the binder is an elastic body, the workpiece is The shape of the polishing tool can be molded to match the shape of the workpiece, which allows the polishing tool to follow the shape of the workpiece and bring it into surface contact, thereby alleviating the local stress concentration that occurs with conventional polishing tools. In addition, since an elastic body is used as the binder, when the polishing tool is pressed against the workpiece, the protruding abrasive grains sink into the binder, and deep scratches occur due to the relaxation of local stress concentration and the penetration of the abrasive grains. It can be brushed smoothly to avoid stains. Moreover, when an elastic body is used as a binder, the abrasive grains fall off during the polishing process and the binder is also appropriately scraped off, so there is no clogging, and therefore there is no need for dressing, and polishing can be done in a short time. It can be made into an inexpensive polishing tool that can be used for machining.

[Brief explanation of drawings]

Figures 1 to 4 are detailed explanatory diagrams of this invention.
The figure is a perspective view showing an elastic polishing tool, which is an example of the same.
Figures 2 (a) to C) are diagrams showing the shape of the elastic polishing tool formed during use, and Figure 3 (a)
) and (b) are explanatory diagrams for polishing a concave arc-shaped surface and a convex arc-shaped surface, respectively; FIG. 4 (a)
and (b) are diagrams for explaining the action of the elastic polishing tool, Figure 5 is a diagram of a conventional polishing tool, Figure 6 is a diagram showing the main parts of a different conventional polishing tool, and Figure 7 (a )
and (b) are diagrams for explaining the problems of the polishing tool shown in Figure 5, Figure 8 is a diagram of a different conventional polishing tool, and Figures 9 (a) and (b) are diagrams for explaining the problems of the polishing tool shown in Figure 5, respectively. FIG. 9 is a diagram for explaining a problem with the polishing tool shown in FIG. 8;

Claims (1)

[Claims] An elastic polishing tool comprising abrasive grains having a particle size of 10 to 80 μm bound together using at least one of natural rubber or synthetic rubber as a binder.