JPS5943079Y2 - Blade support device for polishing rotary multi-blade tools - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a blade receiver and device used for polishing a rotary multi-blade tool.

When polishing a rotary multi-blade tool, normally the blade receiver 10 is placed on the rake face 12 of the blade 12 of the rotary multi-blade tool 11, as shown in FIG. Rotate the grindstone 13 in the direction of the arrow while holding the tool 11 so that it does not rotate.

The purpose of using such a blade rest 10 is to (tl) avoid the influence of the blade groove division error caused by the tool manufacturer during re-sharpening, and (2) to reduce the second angle α (Fig. 4) of the tool. This is to ensure that it comes out evenly on every blade.

Also, for this purpose, in Fig. 4, the second angle α of the tool is
In order to set the value to a predetermined value, the center position of the grinding wheel 13 and the tool 11
The rotary multi-blade tool 11. Grindstone 13 and blade rest 1
You must install and set the 0 champion.

Further, in order to rotate the tool 11 by one pitch when the polishing of one blade of the tool 11 is completed and the next blade is to be polished, the blade rest 10 is attached to the rake surface of the blade 12 of the tool 11.
You must be able to retreat from 2a.

A conventional blade receiver for a rotary multi-blade tool that satisfies these requirements is shown in FIGS. 5 and 6.

In these figures, the blade rest 10 is fixed to a rotating block 14, and this rotating block 14 is attached to a fixed block 16 so as to be rotatable about a pin 15.

The rotating block 14 is pushed counterclockwise by the spring 17 and comes into contact with the end face of the adjusting screw 18.

This position is either the blade rest 10 or the blade 12 of the tool 11 (Fig. 3).
This is the position where the tool 11 comes into contact with the rake face 12°, the rotation of the tool 11 is prevented, and the grinding by the grindstone 13 is performed.

When one blade 12 has been polished, the rotating block 14 is rotated clockwise against the spring 17.

The blade rest 10 is withdrawn from the area of rotation of the blade of the tool 11, allowing the tool 11 (FIG. 3) to rotate clockwise.

When the rotating block 14 is returned counterclockwise by the spring 17 until it contacts the end face of the adjusting screw 18 and the tool 11 is further turned clockwise, the rake face of the next blade to be polished comes into contact with the blade holder 10.

The disadvantages of conventional rotary multi-blade tools are as follows:
The blade rest 10 is not straight with respect to the central axis 21 of the device main body 20.

Note that the main body 20 of the apparatus is a part composed of a main body 22, a support shaft 23, a key 24, a threaded shaft 25, a pin 26, a height adjustment knob 27, and the like.

Even if the positional relationship between the blade holder 10 and the device body 20 is adjusted using the adjustment screw 18, there is no guideline, and even if the blade holder 1
Even if 0 is adjusted straight with respect to the center axis 21 of the main body 20, the backlash of the adjusting screw 18 causes the housing to move and the position of the housing cannot be determined.

Moreover, the position of the blade rest 10 has an important influence on the polishing performance of the rotary multi-blade tool 11.

For example, when the blade holder 10 is at the reference position (for example, 1 position straight with respect to the central axis 21 of the main body 20), as shown in FIGS. 3 and 4, the rake of the blade 12 of the tool 11 is When the surface 12 is perpendicular to the blade rest 10, and assuming that the blade rest 10 is deviated from the reference position by an angle β in the counterclockwise direction, the position of the blade to be polished is I, (1- cmSβ) (L: distance between the tip of the blade receiver and the center of rotation of the blade receiver), and H in FIG. 4 becomes larger by that amount.

As a result, the second angle α of the teeth 12 of the tool 11 becomes larger,
Accurate polishing will not be possible.

Conversely, if the blade rest 10 is shifted clockwise from the reference position, accurate polishing will not be performed in the same way, and in extreme cases, the blade rest 10 will shift from the rake face 12a of the blade 12 of the tool 11.
If it comes off, the casing becomes impossible to polish.

The purpose of the present invention is to improve this point, and to accurately position the blade holder with a simple structure and prevent the blade holder from shifting from the reference position during polishing, thereby causing defective polishing of rotary multi-blade tools. An object of the present invention is to provide a blade support device that prevents the above.

Hereinafter, the present invention will be described in detail with reference to the attached circular.

Fig. 1 is a partial cross-sectional view of the blade receiver of the rotary multi-blade tool of the present invention, and Fig. 2 shows the upper part of Fig. 1 (arrow ■).
This is a diagram seen from.

In FIGS. 1 and 2, the blade rest 10 is integrally fixed to a rotating block 30 by means such as screws (not shown).

As is clear from FIG. 2, the rotating block 30 has a U-shaped portion, and the inner surfaces JOa of the U-shaped portions are parallel to each other.
*30b is a flat carved surface.

The fixed block 31 also has flat cut outer surfaces 31 parallel to each other.
．． It has L steps 31b, and these surfaces are adapted to fit exactly into the U-shaped inner surface 30ae30b of the rotation block 30.

The rotating block 30 is fixed to the fixed block 3 with the fixing bolt 32.
1 and is rotatable about the central axis of the fixing bolt 32.

In order to restrict this rotational movement, a compression spring 33 is provided between the rotating block 30 and the fixed block 31.

In the embodiment shown in FIG. 1, the compression spring 33 is
Rotating block 30 and fixed block 3 at the top of 2
1 into respective holes 34,35.

The rotation block 30 is biased counterclockwise in FIG. 1 by a compression spring 33.

Since the rotating block 30 cannot be fixed in this state, the rotating block 30 and the fixed block 31 are joined to each other by flat-cut joint surfaces 30c and 31c.
are provided respectively.

That is, the rotating block 30 is urged counterclockwise with respect to the defining block 31 by the force of the compression spring 33, and the joint surface 30c=
31c are connected to each other (the first position of the rotating block 30), the tip of the blade holder 10 is connected to the rotating multi-blade tool 11 (
The tool 10 comes into contact with the rake face 12a of the blade 12 in FIG.
This is the position that prevents rotation.

In this position, the tool 10 with the grinding wheel 13 (FIG. 3)
Polishing work is performed.

In this first position, the housing and joint surfaces 30c and 31c are arranged in the direction in which the blade holder 10 receives force from the blade 12 of the tool 11 (
The fixing bolt 32 is positioned so that it is installed substantially perpendicular to the central axis 21 of the device main body 20 and the blade rest 10 is straight with respect to the central axis 21 of the device main body 20.

Of course, the rotating block 30 can be rotated clockwise in FIG. can be withdrawn from the region of rotation of the blade 12 of the tool 11 (FIG. 3) and prepared for the sharpening of the next blade of the tool.

Of course, in this second position, the bonding surfaces 30c"31c are separated from each other.

According to the present invention, at the first position of the rotating block 30, the joining directions 30c, 30c are in a joining relationship with each other,
In addition, since the pressure of the compression spring 33 acts only in one direction, the position of the blade rest 10 (the position straight with respect to the central axis 21 of the device main body 20) is uniquely determined by the fixing bolt 32.

Therefore, in the conventional blade holder shown in FIGS. 5 and 6, it is not difficult to position the blade holder unlike the device, and the blade holder is not affected by backlash of the adjusting screw.

Therefore, according to the present invention, with a simple structure, it is possible to reduce polishing defects of a rotary multi-blade tool and shorten setup time.

[Brief explanation of the drawing]

Fig. 1 shows a partial cross-sectional view (line I-I in Fig. 2) of the rotary multi-blade tool of the present invention.
It is a figure seen from the upper part (arrow If) of a figure. Fig. 3 is a schematic diagram showing the state in which a rotary multi-blade tool is being polished using a blade receiver, Fig. 4 is a schematic diagram for explaining the characteristics of polishing a rotary multi-blade tool, and Fig. 5 is a conventional diagram. Fig. 6 is a partial cross-sectional view of the blade support device of a rotary multi-blade tool.
It is a view seen from the arrow ■ in the figure. 10...Blade receiver, 11...Rotary multi-blade tool, 12...
- Blade, 121... Rake face of blade, 30... Rotating block, 31... Fixed block 3oc, 31c... Joint surface, 32... Fixing bolt, 33... Compression spring.

Claims (1)

[Scope of utility model registration request] The rotary block 30 attached to the fixed block 31 has a blade holder 10 integrally formed therewith that contacts the rake face 121 of the blade 12 of the rotary multi-blade tool 11 to prevent rotation of the tool. and a second position for permitting rotation of the tool, between the defining block and the rotating block, biasing the rotating block to the first position. A spring 33 is provided, and joint surfaces 30c and 31e where the fixed block and rotating block are joined to each other at the -th position are substantially perpendicular to the direction of the force that the blade rest 10 receives from the tool blade. Blade support device for polishing rotary multi-blade tools.