JPH0857707A - Chamfering machine - Google Patents

Abstract

PURPOSE: To perform chamfering work smoothly and effectively by changeably installing cutter tips on a cutter, and coaxially installing a guide roller to be relatively rotatable. CONSTITUTION: In the case of performing chamfering work at a side angular part of a fused surface M of a steel plate P, a rotary base 18 is placed on an upper surface of the steel plate P, a cutter 13 is rotated, and the angular part is cut by cutter tip 26. At this time, a guide surface 37 of a guide roller 31 is applied to a fused surface M, and a chamfering machine is moved along the fused surface M, so the rotary base 18 and the guide roller 31 rotate to move the chamfering machine smoothly to perform chamfering work smoothly and at favorable precision. A guide surface 37 is positioned to be extremely close to the angular part, and a contact length of the guide surface 37 is short, thereby an almost constant size of the chamfering work can be performed even in the case where a squareness of the fused surface M to the upper surface of the steel plate P is not satisfactory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering machine used for chamfering a corner portion of a metal material such as a steel plate used for bridges, ships, and other structures.

[0002]

2. Description of the Related Art Generally, steel materials used for bridges are
Chamfering processing called C or R processing is required for all corners regardless of whether they are straight lines or curved lines. Conventionally, as this type of chamfering machine, one in which a cutter is rotatably attached to its main body and a fixed surface plate and a guide roller are attached is used.

[0003]

By the way, since a fusing machine is used for cutting steel plates, etc., there are some cases where the squareness of the fusing cross section with respect to the plate surface is bad. Therefore, when chamfering is performed, However, there is a problem that the size of R on the upper surface and the lower surface of the steel sheet is large or small, and it takes a lot of labor and time to make the largeness (R) uniform. The present invention has been made in view of the above situation, and an object of the present invention is to provide a chamfering machine capable of improving processing accuracy and workability and increasing productivity.

[0004]

In order to achieve the above object, the present invention takes the following technical means. That is, according to the present invention, a cutter is rotatably attached to a chamfering machine main body by a rotation driving means, and a rotary base is rotatably attached to the outside of the cutter and concentrically, and a cutter tip can be exchanged with the cutter. Along with the mounting, the guide roller is coaxially mounted so as to be relatively rotatable. Further, the present invention is characterized in that the generatrix of the guide roller coincides with the extension line of the blade tip of the cutter tip, and the guide roller is as close as possible to the tip of the blade. It is characterized in that a plurality of are attached.

[0005]

According to the present invention, the rotary base is placed on the plate surface of the work material such as a steel plate, the guide roller is applied to the melted surface of the work material while rotating the cutter, and the chamfering machine uses the melted surface as a guide. By moving, the corners can be smoothly cut and chamfered. At this time, since the rotary base and the guide roller are rotatable, the chamfering machine moves smoothly. Also, since the guide roller is as close as possible to the cutter tip, the size of the machined surface (for example, R surface) is a straight line of the melted cross section in order to use a guide near the corner being machined. It becomes almost constant regardless of the angle, the processing accuracy is improved, the correction processing is not required, and the workability and the productivity are improved.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In the drawing, 1 is a chamfering machine main body, which has a cylindrical shape,
An upper half portion is a motor case 1A and a lower half portion is a cutter holding portion 1B, and an air motor 2 as a driving means is housed in the motor case 1A. The air motor 2 includes a cylinder 3, upper and lower plates 4,
5, the rotor 6, and the ball bearings 7 and 8, the compressed air is supplied into the cylinder 3 to rotationally drive the rotor 6 via the rotary vane 6A.

A motor case cover 9 is fixed to the upper end of the motor case 1A by a cap bolt 10. The lower end shaft portion 6 of the rotor 6
B is inserted into the cutter holding portion 1B, and is fitted and connected to the cutter 13 rotatably mounted in the holding portion 1B via bearings 11 and 12. In addition, 14 is a spacer, 15 is a snap ring, 16 is a spacer,
Reference numeral 17 is a bearing cover, and 41 is a lock nut.

On the outer peripheral surface of the cutter holding portion 1B of the main body 1, a rotary base 18 is fitted with a base body 19 and a needle bearing 20.
1 is attached concentrically with the cutter 13. The rotary base 18 is replaceably attached to the lower end of the annular and cylindrical base body 19 by a bolt 22. The lower end of the cutter 13 is located in the circular hole 18A at the center of the rotary base 18.

As shown in FIG. 3, the lower end of the cutter 13 is inflated and is inclined at two positions symmetrical with respect to the center of the shaft so as to open upward with respect to the axis and from the center of the shaft. The chip fitting portions 23 are provided in a groove shape apart from each other,
As shown in FIG. 4, an air introduction groove 24 is provided at the back of the tip fitting portion 23, and a tip mounting screw hole 25 which is orthogonal to and communicates with the tip fitting portion 23 is provided on the outer peripheral surface in a penetrating manner. Has been.

The tip fitting portion 23 has a structure shown in FIG.
As shown in FIG. 3, a substantially cross-shaped cutter tip 26 is replaceably attached by a mounting screw 27. The cutter tip 26 is provided with four arcuate cutting blades 26A, a tip portion 26B between adjacent cutting blades 26A is sharpened at a right angle like a sword tip, a mounting hole 28 is provided in the center, and a tip of the screw 27 is provided. As shown in FIGS. 5 and 6, a shaft portion 29 eccentrically provided by a predetermined dimension H is loosely fitted in the mounting hole 28.

The mounting hole 28 of the cutter tip 26 has the same diameter as the root diameter of the screw 27. As shown in FIG. 6, one point on the outer peripheral surface of the tip shaft portion 29 of the screw 27 is screwed. It matches with one of the 27 root diameters. Then, as shown in FIG. 4, the inner bottom of the tip fitting portion 23 is a tip supporting surface 30 orthogonal to each other, and the tip end portion 2 is formed.
6B is abutted, and is pushed by the eccentricity H of the shaft portion 29 of the screw 27.

The lower end of the cutter 13 is reduced in diameter to form a mounting portion 32 for the guide roller 31.
1 is rotatably attached by a bolt 35 via a bearing 33 and a snap ring 34. As shown in FIG. 4, the guide roller 31 is provided with an upwardly tapered flange 36, the outer peripheral cylindrical surface of the flange 36 serves as a guide surface 37, and the tip portion 26B of the cutter tip 26 is inside the flange 36. The guide surface 37 (bus bar) is located on the peripheral side and on the downward extension line of the tip cutting blade 26A, and moreover, the tip cutting blade 26A
The upper end of the guide surface 37 of the guide roller 31 is made as close as possible to the lower end of the guide roller 31 so as not to come into contact with it.

As shown in FIG. 2, an operation handle 38 and a throttle handle 39 are attached to the outer peripheral surface of the motor case 1A of the main body 1. And
A drive compressed air supply pipe (not shown) is connected to the throttle handle 39 via a throttle body 4.

In the above embodiment, when chamfering the corners of the steel sheet P on the side of the molten cross section M, the rotary base 18 is placed on the upper surface of the steel sheet P as shown in FIG.
Is rotated, the corner portion is cut by the cutter tip 26, the guide surface 37 of the guide roller 31 is brought into contact with the melted surface M, and the chamfering machine is moved along the melted surface M. Guide roller 31
Rotates and the chamfering machine moves smoothly, and chamfering is performed accurately and smoothly.

According to the above embodiment, the guide surface 37 is located very close to the corner portion, and in addition to the guide surface 3
Since the contact length of 7 is short, even if the squareness of the molten cross section M with respect to the upper surface of the steel plate P is not good, chamfering of a substantially constant size can be performed. And the cutter tip 26
Since the two are arranged symmetrically and are inclined with respect to the axis center line, the cutting reaction force is small, the impact on the hand of the operator is small, and the workability is improved.

Further, since the cutter tip 26 has cutting blades 26A at four positions, if the cutting blade 26A is worn or damaged, it can be used for a long time by changing the mounting position of the cutter tip 26, Durability is greatly improved. The present invention is not limited to the above embodiment, and can be appropriately modified in design, for example, an electric motor can be used as a drive source of the cutter 13, and the shapes of the cutter tip 26 and the guide roller 31 can be variously changed. can do.

[0017]

As described above, according to the present invention, the cutter is rotatably mounted on the main body of the chamfering machine by the rotation driving means, and the rotary base is concentrically mounted on the outside of the cutter so as to be rotatable. It is characterized in that the cutter tip is attached so that it can be exchanged, and the guide roller is coaxially attached so as to be relatively rotatable, so that the chamfering machine can be moved smoothly and the chamfering process can be performed smoothly. Can be done efficiently.

Further, the present invention is characterized in that the generatrix of the guide roller is aligned with the extension line of the cutting blade of the cutter tip, and the guide roller is as close as possible to the tip of the cutting blade. Therefore, even if the molten cross section of the work material such as a steel plate does not have a good squareness with respect to the plate surface, chamfering of approximately the same size can be performed accurately, and quality, work efficiency, and Productivity can be improved.

Further, since the present invention is characterized in that a plurality of the above-mentioned cutter tips are attached, the cutting reaction force is small, the impact on the hand of the operator is small, and the processing efficiency is improved. be able to.

[Brief description of drawings]

FIG. 1 is a central longitudinal front view showing an embodiment of the present invention.

FIG. 2 is an overall plan view of the same.

FIG. 3 is an enlarged view taken along the line AA of FIG.

4 is a partially cutaway left side view of FIG. 3. FIG.

FIG. 5 is a front view of a cutter tip mounting screw.

FIG. 6 is a left side view of FIG.

[Explanation of symbols]

 1 Chamfering machine main body 2 Cutter rotation driving means 13 Cutter 18 Rotary base 26 Cutter tip 31 Guide roller 37 Guide surface P Work material (steel plate)

Claims (3)

[Claims] 1. A chamfering machine main body is provided with a cutter rotatably by a rotation driving means, and a rotary base is concentrically and rotatably attached to the outside of the cutter, and a cutter tip is replaceably attached to the cutter. A chamfering machine is characterized in that a guide roller is coaxially attached so as to be relatively rotatable. 2. The generatrix of the guide roller is aligned with the extension line of the cutting edge of the cutter tip, and the guide roller is as close as possible to the tip of the blade. Chamfering machine. 3. The chamfering machine according to claim 1, wherein a plurality of the cutter tips are attached.