JPH0829504B2 - Vibrating tool - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vibration cutting device that generates vibration during cutting and cuts a workpiece while effectively utilizing this vibration.

[Conventional technology]

Machine tools for cutting workpieces using cutting tools include lathes, drilling machines, boring machines, milling machines, planing machines, and shapers, but other hand-held cutting tools include power-driven tools.

It is known that in these machine tools, when cutting is performed while applying appropriate vibration to a cutting tool, excellent effects such as improvement in cutting speed, processing accuracy, and durability of cutting blades are recognized.

As an oscillating device for vibrating the cutting tool as described above, a vibrating type or a magnetic flue type vibrator that is excited at a frequency from an oscillator is often used. Electro-hydraulic type, mechanical-hydraulic type, etc. have been proposed.

[Problems to be Solved by the Invention]

The vibration means of the conventional cutting tool as described above is used for a handheld small and lightweight tool because it requires a complicated electric circuit and a large and expensive device with a complicated function such as a hydraulic cylinder. There is a problem that you can not.

An object of the present invention is to provide a vibrating tool which solves the above-mentioned problems of the conventional vibrating cutting tool and which is of a hand-held type and can perform a vibrating cutting action.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present invention provides a rod that can move back and forth in the front part of a handle, and a reciprocating drive means for driving the rod in the handle, and a guide fixed to the front part of the rod. The member and the holder with the cutting tool attached are connected via a vibrator so that they can be moved slightly in the front-back direction.
(EN) Provided is a vibrating tool in which a guide member is provided with a receiving portion for receiving the rear end of a retracted holder, and a spring is provided between the holder and the guide member to press the rear end of the holder against the receiving portion.

In addition, a cylindrical cover that freely rotates about the shaft center of the rod is attached to the front portion of the handle, and fixing means for fixing the cover to the handle at an arbitrary rotation angle is provided. Provides a vibrating tool in which the guide member and the holder are mounted so as to be able to rotate together with the cover, and a vibrating tool in which the driving means is an air cylinder, and a communication passage for guiding the exhaust gas to the cutting tool as cooling air is provided. .

[Action]

Since the present invention has the above-mentioned structure, when the operator holds the handle and the reciprocating drive means inside the handle is activated, the rod reciprocates, and a cutting tool such as a saw blade or a file attached to the front portion of the rod by the guide member and the holder. Reciprocates to cut the work.

In the above cutting action, a minute vibration is generated in the cutting tool, but this minute vibration is transmitted to the vibrator through the holder,
This vibration is reversely transmitted to the cutting tool to enhance the cutting force of the cutting tool.

When no load is applied during cutting, the rear end of the holder comes into contact with the receiving portion by the action of the pressing spring, and the rod and holder are integrated, so that vibration does not occur even when the rod is driven.

Further, when the fixing means is loosened, the cover can freely rotate with respect to the handle.

Since the holder to which the cutting tool is fixed is rotated together with the cover, when the driving means is an air cylinder, the piston integrated with the rod is made to be rotatable with respect to the cylinder so that the cover can be rotated. The rotation of the saw blade allows the direction of the saw blade to be freely changed, which facilitates the lever operation and the cutting work.

Further, when the driving means is an air cylinder, the exhaust thereof is used as cooling air to be blown to the cutting tool through the communication passage to prevent the cutting tool from overheating.

〔Example〕

In the first embodiment shown in FIGS. 1 to 5, 1
Is a hollow handle in which a reciprocating drive means is provided.

The reciprocating driving means is composed of an air motor or an electric motor and a crank rod mechanism or a cylinder mechanism utilizing air or hydraulic pressure. To move rod 2 back and forth,
Reference numeral 3 in FIG. 1 denotes an operation lever for starting or stopping the reciprocating drive means.

Reference numeral 4 denotes a cylindrical cover rotatably attached to the tip of the handle 1, and a screw cylinder 5 is screwed and fixed to the tip of the rod 2 projecting inside thereof. The rear end of the tubular guide member 7 is fitted to the outer periphery and fixed by the bolt 8.

Reference numeral 9 denotes a holder slidably fitted in the front portion of the guide member 7, and a small diameter portion 11 integrally formed at the rear end of the holder 9.
A pressing spring 15 is mounted between the large-diameter head 13 of the bolt 12 screwed into the female screw inside and the receiving portion 14 on the inner circumference of the intermediate portion of the guide member 7.

The holder 9 has a round bar shape as shown in FIG. 4 and is provided with a saw blade 18 as a cutting tool. Therefore, a slit 16 having a required depth is provided from the tip thereof.

A round hole is provided in the rear portion of the saw blade 18, a similar round hole 20 is provided in one of the holders 9, and a set screw 21 inserted through the round hole 20 and the round hole of the saw blade 18 is provided on the other side of the holder 9. The saw blade 18 is screwed into the screw hole 22 so that the saw blade 18 is detachably fixed to the holder 9.

Further, the large-diameter head portion of the set screw 21 is used as the vibrator 23, and as shown in FIG.
A clearance X for generating vibration is provided between the front end of the elongated hole 19 and the vibrator 23 by loosely fitting it, and the other end of the set screw 21 is loosely fitted in the elongated hole 19 'on the other side of the guide member 7.

Reference numeral 24 is a U-shaped guard frame. The upper and lower straight portions 28 of the guard frame 24 are fitted in the upper and lower grooves 26 of the bush 25 in the cover 4, and the set screw 30 screwed into the screw hole of the cover 4 is used to form the guard frame 24. At the same time, the bush 25 is fixed in the cover 4, and the saw blade 18 is projected from the opening 29 in the front center of the guard frame 24. The bush 25 has elongated holes 27, 2 where the vibrator 23 and the end of the screw 21 fit.
7'is provided.

Further, the outer periphery of the guide member 7 is formed into a square shape as shown in FIG. 4, and is brought into contact with the guide surface 31 of the bush 25 to prevent rotation.

A handle bush 32 is screwed to the front portion of the handle 1 as shown in FIG. 2, and the rear portion of the cover 4 is rotatably fitted to the outer periphery of the bush 32 protruding from the front end of the handle 1,
The spring pin 34 pushed into the lateral hole 33 provided on one side of the rear portion of the cover 4 is engaged with the circumferential groove 35 on the outer periphery of the front end of the bush 32 as shown in FIGS.

A plurality of recesses 36 are formed on the outer circumference of the tip of the bush 32 or the entire circumference of the bush 32, and the inner end of the set screw 37 screwed into the screw hole at the rear of the cover 4 is engaged with any recess 36 to rotate. I will stop.

When air is used as a vibration source, the rod 2 is provided with a communication passage 41, and as shown in FIG.
Are communicated with each other through the communication hole 17, and the screw cylinder 5, bolt 12, holder 9
As shown in FIG. 3, communication passages 40, 38 and 39 are respectively provided at the centers of the so that the exhaust gas of the exhaust chamber 42 is discharged as cooling air toward the saw blade 18.

Next, the operation of the above embodiment will be described.
When the lever 3 is held by hand and the lever 3 is pushed toward the handle 1, the valve in the handle 1 is opened and the reciprocating drive means is activated, so that the rod 2
Goes back and forth.

When the rod 2 moves back and forth, the guide member 7 integrated with it moves back and forth.

When no load is applied without cutting, the rear end of the holder 9 comes into contact with the receiving portion 14 of the guide member 7 by the action of the pressing spring 15, and the rod 2 and the holder 9 are integrated so that the rod 2 is driven. However, vibration does not occur.

Further, when the cutting operation is started using the saw blade 18, the microvibration generated in the saw blade 18 is transmitted to the vibrator 23,
Vibrates to collide with the vibrator 23 and the front end of the elongated hole 19, whereby the vibration is increased and is transmitted to the saw blade 18 in reverse to improve the sharpness.

Further, when the set screw 37 is loosened, the cylindrical cover 4 can freely rotate with respect to the handle 1.

Since the holder 9 to which the saw blade 18 is fixed is rotated together with the cover 4, it is possible to rotate the piston (not shown) integrated with the rod 2 with respect to the cylinder (not shown). By rotating the cover 4 with respect to the handle 1, the direction of the saw blade 18 can be freely changed to operate the lever.

When the driving means is an air cylinder, its exhaust is used as cooling air, and the exhaust chamber 42 → communication hole 17 → communication passages 41, 40, 3
8 and 39 flow to both sides of the saw blade 18 to air cool the saw blade 18.

6 to 9 show the second embodiment, in which the head 21 'of the set screw 21 does not serve as a vibrator, and the small diameter part of the holder 9 is used.
A convex portion is provided on the outside of 11 to form a vibrator 45, and a gap X for generating vibration is provided between the receiving portions 14 of the guide member 7.

The inner periphery of the receiving portion 14 has a horizontally long opening 46 as shown in FIG. 8. At the time of assembly, the vibrator 45 is placed sideways into the opening 46 and then rotated by 90 ° to turn the head 21 of the set screw 21. 'And slot 19
To prevent the guide member 7 from rotating.

Further, a spring receiving projection 47 is provided on the inner periphery of the guide member 7 behind the vibrator 45.

 The other structure is the same as that of the first embodiment.

In the case of this embodiment, when no load is applied without cutting, the step portion 47 'of the holder 9 comes into contact with the receiving portion 14 of the guide member 7 by the action of the push spring 15, and the rod 2 and the holder 9 are integrated. Therefore, no vibration occurs even if the rod 2 is driven.

In addition, if the cutting work is started using the saw blade 18,
The minute vibration generated in 18 is transmitted to the oscillator 45, the oscillator 45 vibrates, and the oscillator 45 collides with the receiving portion 14, whereby the vibration is amplified and is transmitted back to the saw blade 18 to improve the sharpness. To do.

 The operation of other parts is the same as that of the first embodiment.

The graph in FIG. 9 is an example showing sharpness, the vertical axis represents the cutting speed mm / 10 sec, and the horizontal axis represents the workpiece (steel plate).
The plate thickness (mm) is taken.

In this graph, II indicates the cutting speed by the cutting tool according to the embodiment of the present invention, I indicates the cutting speed by the conventional cutting tool, and it can be seen that the cutting speed is improved in II as compared with I.

The above embodiment has been described with respect to the case of the saw blade 18, but it can also be used as a tool for cutting a work by reciprocating motion such as a round file, a flat file, a semi-round file, and a triangular file.

〔The invention's effect〕

As described above, according to the present invention, a rod that can move back and forth is provided in the front part of the handle, a reciprocating drive means for driving the rod is provided in the handle, and a guide member and a cutting tool fixed to the front part of the rod are provided. The attached holder is connected via a vibrator so that it can be moved slightly in the front-rear direction, and the guide member is provided with a receiving portion for receiving the rear end of the retracted holder, and the rear end of the holder is located between the holder and the guide member. Since there is a spring that presses against the receiving part, the rod, the guide member, and the holder with the cutting tool are integrally advanced and retracted even when the driving means is started and the cutting tool is moved back and forth when there is no load. Therefore, no vibration is generated, and therefore, there is no fear of causing unnecessary vibration before cutting and causing a user to feel uncomfortable.

Further, when the cutting is started, a minute vibration generated in the cutting tool is transmitted to the vibrator to increase its amplitude, and the vibration is transmitted to the cutting tool to vibrate the cutting tool to improve the sharpness.

Further, a cylindrical cover which is freely rotatable around the axis of the rod is attached to the front part of the handle, and a fixing means for fixing the cover to the handle at an arbitrary rotation angle is provided.
In the case where the guide member and the holder are installed in the cover so as to be rotatable together with the cover, the direction of the cutting tool can be freely changed together with the cover at the tip of the handle, so that the cutting tool is a saw blade or a file. However, in the case of a directional object such as a flat file or a semi-round file, the direction of the cutting tool can be changed with respect to the handle according to the shape of the cutting place, which is convenient.

Further, in the case where the exhaust of the air cylinder as the driving means is guided to the cutting tool as cooling air, the cutting tool is always air-cooled, so that there is an effect that the cutting tool does not become heated even if it is used for a long time. .

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the tool of the present invention, FIG. 2 is an enlarged vertical side view of the essential parts of the same, and FIG.
-III enlarged longitudinal plan view, FIG. 4 is an enlarged transverse front view of FIG. 2 IV-IV line, FIG. 5 is an enlarged transverse front view of VV line of FIG. 2, and FIG. An enlarged vertical side view showing the main part of the embodiment, FIG. 7 is an enlarged cross-sectional front view of the line VII-VII in FIG. 6, and FIG.
FIG. 6 is an enlarged cross-sectional front view of the line VIII-VIII in FIG. 6, and FIG. 9 is a graph showing the cutting ability. 1 ... Handle, 2 ... Rod, 7 ... Guide member, 9
…… Holder, 14 …… Reception part, 15 …… Pressing spring, 17 …… Communication hole, 18 …… Saw blade, 23,45 …… Transducer, 38, 39, 40, 41…
… Communication hole, 42 …… Exhaust chamber.

Claims (3)

[Claims] 1. A holder having a rod which can be moved back and forth in the front part of a handle, a reciprocating drive means for driving the rod provided in the handle, and a guide member fixed to the front part of the rod and a cutting tool. Are connected via a vibrator so that they can be moved slightly in the front-rear direction, the guide member is provided with a receiving portion for receiving the rear end of the retracted holder, and the rear end of the holder is received between the holder and the guide member. A vibrating tool with a spring that presses against. 2. A front cover of the handle is provided with a cylindrical cover which is freely rotatable around the axis of the rod, and fixing means is provided for fixing the cover to the handle at an arbitrary rotation angle. The vibrating tool according to claim 1, wherein the guide member and the holder are mounted in the cover so as to be rotatable together with the cover. 3. A vibrating tool according to claim 1, wherein the driving means is an air cylinder, and a communication passage for guiding the exhaust air of the air cylinder to the cutting tool is provided.