JPH0457661A - Polishing of cutting tool blade edge - Google Patents

Abstract

PURPOSE:To polish extremely efficiently a cutting edge and improve operability by applying a cutting tool blade to an attracting surface of an electromagnet, locating and attracting the edge of the blade and then moving the blade and a polishing wheel relative to each other to polish the edge. CONSTITUTION:A pair of left and right lades 2 of a cutting tool 1 are opened and the previously finished back of one blade 2 is applied to an attracting surface of an electromagnet 11 supported on a table 10. After the edge 4 of the blade 2 is located, the blade 2 is attracted by an electromagnet 11. Next, a polishing wheel 16 having a polishing surface inlined rather to the inner surface of the edge 4 of the blade 2 is rotated in one direction. The polishing wheel 16 and the blade 2 attracted to the electromagnet 11 are moved relative to each other while being held with a relative angle to each other to polish the edge of the blade 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a polishing method for polishing the cutting edge of a cutting tool such as nippers or pliers.

[Conventional technology]

Generally, in a cutting tool such as a nipper or a bench, after the halves are connected so as to be openable and closable by caulking, the back surfaces of the left and right blade parts are finished, and then the cutting edge of each blade part is polished.

[Problem to be solved by the invention]

By the way, the grinding of the above-mentioned cutting edge has traditionally been done manually, which requires a lot of effort and time, and also causes variations in the accuracy of the cutting edge angle, making it impossible to obtain products of uniform quality. There was a problem.

An object of the present invention is to solve the above-mentioned problems and to improve the working efficiency of cutting edge polishing and make the quality uniform.

[Means to solve the problem]

In order to solve the above problems, in this invention, a pair of left and right blade portions of a cutting tool are opened, and the pre-finished back surface of the blade portion is supported on a table. After applying it to the attracting surface of the magnetic magnet and positioning the edge of the blade, the electromagnetic magnet attracts the blade, and a grinding wheel whose abrasive surface is slightly inclined to the inner surface of the edge of the blade of the blade is attached. We adopted a configuration in which the grinding wheel rotates in one direction, and the cutting edge of the blade is polished by moving the grinding wheel and the blade, which is attracted to an electromagnetic magnet, at a relative angle.

[Effect]

With the above configuration, since the pre-finished back surface of the blade is attracted by the electromagnetic magnet, the blade can be supported extremely stably in a positioned state, and the cutting edge of the positioned blade can be supported very stably. Since the grinding wheel contacts the inner surface while maintaining a relative angle to polish the cutting edge, the angle of the cutting edge is always constant and a product of uniform quality can be obtained.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Now, to explain the polishing of the cutting edge of the nipper 1 as an example, the nipper 1 has a pair of blade parts 2, and each blade part 2 is
The back surface 3 of is pre-finished to a predetermined surface accuracy.

The nipper 1 has the first
cents on table 10 of the figure. Here, the table 10 is movable back and forth, left and right, and up and down, and an electromagnetic magnet 1 for supporting the nippers is mounted on the top surface of the table 10.
1 is supported.

1 itil! The magnet 11 has a suction surface 12 at one end, and the suction surface 12 has an appropriate shape depending on the shape of the back surface 3 of the blade portion 2.

For example, when the back surface 3 is flat as shown in FIG. 2, the suction surface 12 is also flat. Further, as shown in FIG. 4, when the suction surface 12 is a convex curved surface, the suction surface 12 is a concave curved surface and has a shape that allows the entire back surface 3 of the blade portion 2 to be suctioned.

As shown in FIG. 2, the back surface 3 of one blade portion 2 of the nipper 1 in the open state is 1 iM! The blade portion 2 is placed on the lower surface of the positioning piece 14 of the positioning block 13 that is applied to the attraction surface 12 of the L magnet 11 and provided on the upper surface of the electromagnetic magnet 11.
The entire blade edge 4 of the blade is brought into contact and positioned. After that positioning! By energizing the magnetic magnet 11, the blade portion 2 is attracted and held.

At this time, the entire back surface 3 of the blade portion 2 is attracted, so
The positioning block 13 is held extremely stably, and after positioning and attracting the blade portion 2, the positioning block 13 is removed from above the blade edge 4.

A circular polishing wheel 16 rotated by a motor 15 is provided on the front side of the blade portion 2 which is attracted and supported by an electromagnet 11 . The polishing surface 17 of this polishing whetstone 16 is slightly inclined with respect to the inner surface of the edge of the blade portion 2 which is attracted and held by the electromagnet 11.

The polishing whetstone 16 is rotated in one direction, and the table 10 is moved back and forth, left and right, and the inner surface of the cutting edge portion of the blade portion 2 is polished by the polishing whetstone 1.
By bringing the polishing wheel 16 into contact with the polishing surface 17 of the polishing wheel 16
The cutting edge of the blade portion 2 is polished by contact with the blade.

On the other hand, after polishing the cutting edge of blade part 2,! The adsorption of the magnetic magnet 11 is released, and the remaining blade part 2 is adsorbed by the adsorption surface 12 of the electromagnetic magnet 11, so that the cutting edge of the blade part 2 is polished once.

As mentioned above, in order to polish the blade edge by bringing the blade 2, which is positioned and attracted to the electromagnetic magnet 11, into contact with the polishing surface 17 of the polishing wheel 16 placed in a fixed position by moving the table 10 back and forth and in the left and right directions. The relative angle between the inner surface of the edge of the cutting edge of the blade portion 2 and the polishing surface 17 of the abrasive wheel 16 is always constant, and as a result, a uniform product with a constant cutting edge angle can be obtained.

In the case of the embodiment, the blade part 2 of the nipper 1 was moved relative to the abrasive wheel 16 placed at a fixed position, but the blade part 2 was fixed and the abrasive wheel 16 was moved relative to the blade part 2. may be moved.

In this case as well, the polishing wheel 16 is moved while keeping the relative angle between the polishing wheel 16 and the blade portion 2 constant.

The explanation was given using nippers as an example of a cutting tool.
The cutting tool is not limited to this, and may be pliers, for example.

〔Effect of the invention〕

As described above, according to the cutting edge polishing method according to the present invention,
The blade of the cutting tool is brought into contact with the attraction surface of the electromagnetic magnet, and the cutting tool is positioned with the cutting edge of the electromagnetic magnet. Polishing can be performed extremely efficiently and workability can be improved.

Furthermore, since the polishing work is performed while maintaining the relative angle between the blade portion positioned by the electromagnetic magnet and the polishing wheel, a uniform product with a constant blade edge angle can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing the apparatus used in the polishing method according to the present invention, FIG. 2 is a vertical side view of the same, FIG. 3 is a perspective view of the same, and FIG. 4 is a view of the blade of the nipper. It is a sectional view showing other examples. 1...Nippers, 2...Blade portion, 3...Back surface, 4...Blade edge, 10...Table, 11. ... Electromagnetic magnet, 12 ... Adsorption surface, 16 ... Polishing whetstone.

Claims (1)

[Claims] (1) Open the pair of left and right blades of the cutting tool, apply the pre-finished back side of the blade to the attraction surface of the electromagnetic magnet supported on the table, and position the cutting edge of the blade. The blade part is attracted by the electromagnetic magnet, and a grinding wheel whose polishing surface is slightly inclined to the inner surface of the edge of the blade part is rotated in one direction, and the grinding wheel and the blade part attracted by the electromagnetic magnet are rotated in one direction. A method for polishing the cutting tool's cutting edge, in which the cutting tool's cutting edge is polished by relatively moving the blade while maintaining its relative angle.