JP2000176719A - Chamfering machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily move a chamfering machine without providing a travel function by providing jet nozzles for jetting air to the side face of a work near the side face of the work on a frame. SOLUTION: A plurality of recesses 57 extending nearly in the radial direction are formed on the whole face of a cover 16, and jet nozzles 58 are bored at the center side end sections of the recesses 57 on the cover 16. When air is jetted from the jet nozzles 58 via a tube 55, a turbine 51 is rotated to rotate rotary cutting edge 23. A fine gap is formed between a regular surface 19 and a steel sheet W by the air jetted from the jet nozzles 58, thereby the travel resistance between the regular surface 19 and the steel sheet W is almost eliminated, and a chamfering machine can be easily moved and stopped, thus the chamfering machine can be miniaturized and made lightweight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering machine for chamfering an end face of a work such as a steel plate.

[0002]

2. Description of the Related Art Conventionally, when chamfering an end face of a steel sheet as a work, it has been performed by grinding a corner of the end face of the steel sheet by a grinder. In such a method, since the amount and angle of chamfering are not constant, not only the appearance quality of the chamfered part is inferior but also the working efficiency is low. In order to solve this, chamfering is also performed by a device having a rotary blade at a fixed position and having a feed mechanism for feeding a steel plate toward the rotary blade.

[0003]

However, such an apparatus is large-scale, requires high equipment costs, and
Requires a large installation space. For this reason, it is impossible to perform chamfering at a construction site using a steel plate.

On the other hand, a small chamfering machine capable of chamfering at a construction site or the like has been developed. This apparatus is different from the above-mentioned large-scale installation type chamfering machine in that the apparatus moves on a steel plate to perform chamfering. For this reason, this chamfering machine is equipped with a traveling mechanism driven by a motor. Therefore, even with this chamfering machine, there is a limit in reducing the size and weight.

An object of the present invention is to provide a handy type chamfering machine which can solve the above problems and can be reduced in size and weight.

[0006]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, according to the first aspect of the present invention, a frame having a handle is provided with a rotary cutting blade for performing chamfer cutting, and the frame is provided with the rotary cutting blade. Is provided with an ejection port for injecting air toward the side surface of the work near the side surface of the work.

Therefore, at the time of chamfering, a minute gap is formed between the frame and the work by the air injected from the injection port. Therefore, the worker can easily move the chamfering machine without providing the traveling function. Therefore,
The traveling function becomes unnecessary, and the chamfering machine can be reduced in size and weight.

[0008] In the invention of claim 2, in claim 1,
The frame is provided with an air motor, and the rotary cutting blade is rotated by the air motor. Air supplied for driving the air motor is jetted from an injection port.

Therefore, since the air used for driving the air motor is used for moving the chamfering machine, there is no need to provide a dedicated air supply mechanism, and the configuration is simple. In addition, since air only functions to provide a minute gap between the chamfering machine and the work, the operator can freely move the chamfering machine in any direction or stop the movement of the chamfering machine. be able to.

According to a third aspect of the present invention, in the first or second aspect, the frame is provided with a defining surface for defining a positional relationship between the rotary cutting blade and the work in close proximity to the side surface of the work during chamfering cutting. The injection port is provided on a prescribed surface.

Therefore, air can be reliably supplied between the workpiece and the specified surface, the chamfering machine can be easily moved for chamfering, and the rotary cutting blade for the workpiece is operated by the function of the specified surface. Can be held accurately, and highly accurate chamfering can be performed. .

According to the fourth aspect of the invention, the first to third aspects are provided.
In any one of the above, an air blowing port is provided around the rotary cutting blade. Therefore, chips are scattered by the air blown from the air blowing port, and an efficient chamfering operation can be performed.

According to the fifth aspect of the present invention, the first to fourth aspects are provided.
In any one of the above, the rotary cutting blade is disposed at the center of the prescribed surface. Therefore, if the specified surface is along the side surface of the work, one of the injection ports faces the work. For this reason, the direction of the movement of the chamfering machine is lost, and the chamfering machine can be moved in all directions within a plane parallel to the side surface of the work. Therefore, it can easily cope with works of various shapes.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the frame 11 has a handle 12 and a disk portion 13 integrally. A shaft hole 14 is formed through the center of the handle 12 and the disk portion 13, and a circular recess 15 communicating with the shaft hole 14 is formed on a side surface of the disk portion 13. A cover 16 is provided on the side of the disk portion 13 so as to close the recess 15.
Is fixed by a screw 17, and an opening 18 as a blowing port is provided through the center of the screw 17. And the cover 16
Is the defining surface 19.

In the shaft hole 14, a rotating shaft 20 perpendicular to the defining surface 19 is rotatably supported via bearings 21 and 22, and the tip of the rotating shaft 20 projects outward from the opening 18. A cutting blade 23 is provided. This cutting blade 23
Is for chamfering and cutting the end face of the work W.

As shown in FIG. 4 and FIG.
Numeral 0 includes a cylindrical outer cylinder 31 and a blade holding shaft 32 inserted into the outer cylinder 31. Blade holding shaft 32
Has a cylindrical shape, and a blade shaft 33 is inserted therein. A roller 34 is rotatably supported at the tip of the blade shaft 32, the rotary cutting blade 23 is fixed, and a screw formed at the rear end of the blade shaft 33 has the blade holding shaft 3.
A retaining nut 35 located outside the screw 2 is screwed.
The blade holding shaft 32 is fixed to the retaining nut 35 by a screw 36 screwed from a side surface of the retaining nut 35. Further, the blade holding shaft 32 and the blade shaft 33 are fixed by a fixing means (not shown) so that the blade shaft 33 can move in the axial direction, and the shafts 32 and 33 are integrally rotated.

The blade holding shaft 32 and the outer cylinder 31 are fixed by screws 37, and they are integrally rotated. Notch 38
Is formed on the outer periphery of the blade holding shaft 32 and constitutes an engagement surface with which the tip of the screw 37 engages. A screw hole 39 is formed at the base end of the outer cylinder 31, and an adjustment screw 40 is screwed into the screw hole 39, and the tip of the adjustment screw 40 contacts the retaining nut 35.

A collar 41 is fitted on the outer peripheral surface of the outer cylinder 31 so as to correspond to the space between the bearings 20 and 21, and maintains the space between the bearings 21 and 22. Color 41
The screw 37 is loosely fitted in the through hole 42. To correspond to the through hole 42,
A through hole 43 is formed in the handle 12. Outer cylinder 31
A ring 45 is fitted into a groove 44 formed on the outer periphery of the ring. A ring 46 is also mounted on the inner peripheral surface of the shaft hole 14. These rings 45, 46 are
Block the movement of 2.

As shown in FIG. 1 and FIG.
Inside, a turbine 51 is fixed to a step portion at the tip of the outer cylinder 31, and a plurality of turbine blades 52 are formed on the outer periphery thereof. An air passage 53 extends through the inside of the disk portion 13, and a base 54 is connected to an intermediate portion of the air passage 53. The base 54 is connected to a high-pressure air supply source (not shown) via a tube 55, and high-pressure air is supplied into the air passage 53 from the high-pressure supply source. Inner peripheral surface 2 of recess 15
The nozzle openings 56 at both ends of the air passage 53 are 180
The openings are directed at the same angle in the same direction. The high-pressure air from the air passage 53 is injected from the nozzle port 56 toward the turbine blade 52,
Is rotated at high speed. The turbine 51, the air passage 53, and the like constitute an air motor.

A plurality of recesses 57 extending substantially in the radial direction are formed on the front surface of the cover 16, and the cover 16 is provided with an injection hole 58 at the center end thereof.
The chamfering machine configured as described above operates as follows.

First, in order to obtain a required chamfer width, the protrusion amount of the rotary cutting blade 23 may be adjusted. This is done as follows. That is, the screw 37 is inserted into the through holes 42 and 4.
3, and the screw 37 is loosened.
Therefore, the blade holding shaft 32 can move in the axial direction, and in this state, if the screw 40 is moved forward and backward from the rear end opening of the shaft hole 14, the blade holding shaft 32 is moved forward or backward in the axial direction, The protrusion amount of the rotary cutting blade 23 is adjusted.
In this state, the screw 37 is tightened to fix the blade holding shaft 32 and the outer cylinder 31.

When air is injected from the nozzle port 56 through the tube 55 and the like, the turbine 51 is rotated, and the rotary cutting blade 23 is rotated. At the same time, air is ejected from the opening 18 and the ejection port 58.

In this state, the specified surface 19 is made to extend along the side surface of the steel plate W, and the roller 34 is used as a work.
When the entire chamfering machine is moved along the end face of the steel sheet W in contact with the end face of the steel sheet W, the end face of the steel sheet W is chamfered by the rotary cutting blade 23.

The chamfering machine of this embodiment described above has the following effects. An injection port 58 is provided around the rotary cutting blade 23. Therefore, at the time of chamfering, a minute gap is formed between the defining surface 19 and the steel plate W by the air injected from the injection port 58. Therefore, there is almost no running resistance between the defining surface 19 and the steel plate W, and the movement and stop of the chamfering machine can be easily performed without providing a running function. Therefore, the chamfering machine can be reduced in size and weight.

Since the defining surface 19 is provided on the side surface of the chamfering machine, the positional relationship between the rotary cutting blade 23 and the steel plate W can be set accurately, and high-precision machining becomes possible. The frame 11 includes an air motor including a turbine 51 and the like, and the rotary cutting blade 23 is rotated by the air motor. Then, air supplied for driving the air motor is injected from the injection port 58. For this reason, since the air used for driving the air motor is used for moving the chamfering machine, there is no need to provide a dedicated air supply mechanism, and the configuration is simple. In addition, since the rotary cutting blade 23 is rotated by the air motor, when an abnormal load is applied to the rotary cutting blade 23, the rotation of the rotary cutting blade 23 stops or becomes slow. 23 can be prevented from occurring.

The frame 11 is provided with a defining surface 19 for defining the positional relationship between the rotary cutting blade 23 and the steel plate W in the vicinity of the side surface of the steel plate W at the time of chamfering, and an injection port 58 is formed on the defining surface 19. Provided. Therefore, air can be reliably supplied between the steel plate W and the defining surface 19, and the chamfering machine can easily move for chamfering.

Since the opening 18 is provided around the rotary cutting blade 23, chips can be blown off by air from the opening 18. Therefore, it is possible to suppress the chips from being caught between the roller 34 and the steel plate W, and the operation can be performed smoothly.

A rotary cutting blade 23 at the center of the defining surface 19;
, The directionality is lost in the movement of the chamfering machine. That is, even if the end surface of the steel plate W is curved or bent in the vertical direction in FIG. 1, any one of the injection ports 58 faces the side surface of the steel plate W, so that the chamfering machine can be moved in all directions, up and down, left and right. Therefore, it can easily cope with works of various shapes.

Since the injection port 58 is disposed in the concave portion 57, at least the region of the concave portion 57 becomes a high-pressure region of air, and a minute gap between the steel plate W and the defining surface 19 can be reliably formed, and high precision And can contribute to efficient processing.

The present invention is not limited to the above embodiment, but can be embodied as follows. Various changes in the shape and number of the concave portions 57 in which the injection ports 58 are formed.

The operation of moving the chamfering machine is performed from above with the handle 12 facing upward.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing the entire chamfering machine.

FIG. 2 is a side view of the chamfering machine.

FIG. 3 is a side view showing a state where a cover is removed.

FIG. 4 is a front view of a rotating shaft.

FIG. 5 is a sectional view of a blade holding shaft.

[Explanation of symbols]

11: Frame, 12: Handle, 18: Opening constituting air blowing hole, 19: Defined surface, 23: Rotating cutting blade,
51: turbine constituting the air motor, 58: injection port.

Claims (5)

[Claims] 1. A frame having a handle is provided with a rotary cutting blade for performing chamfer cutting, and the frame includes:
A chamfering machine provided with an injection port for injecting air toward the side of the work. 2. The chamfering machine according to claim 1, wherein the frame is provided with an air motor, and the rotary cutting blade is rotated by the air motor, and air supplied for driving the air motor is jetted from an injection port. 3. A frame is provided with a defining surface for defining a positional relationship between the rotary cutting blade and the work in close proximity to a side surface of the work at the time of chamfering cutting, and the injection port is provided on the defining surface. Or the chamfering machine according to 2. 4. The chamfering machine according to claim 1, wherein an air blowing port is provided around the rotary cutting blade. 5. The chamfering machine according to claim 1, wherein a rotary cutting blade is arranged at a center of the prescribed surface.