JP3010196B2 - Chamfering machine - Google Patents

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 of a workpiece such as a steel plate. And a chamfering machine for performing chamfering (referred to as C machining or R machining) such that two side surfaces are smoothly connected by an arcuate curved surface.

[0002]

2. Description of the Related Art A conventional chamfering machine is disclosed, for example, in JP-A-8-57707. This chamfering machine is generally constituted by rotatably mounting a cutter on which a cutter tip is exchangeably mounted on a chamfering machine main body, and having a rotation axis of the cutter perpendicular to one side surface of a corner of a workpiece. Then, the corners are cut with a cutter tip. Also, in order to facilitate the movement while maintaining the posture of the cutter tip with respect to the corner, a rotary base that comes into contact with one surface of the corner is attached to the chamfer body, and a guide roller that comes into contact with the other surface is attached to the cutter. Attached.

[0003]

In the above chamfering machine, when changing the radius of the arc-shaped curved surface formed by chamfering, the cutter tip is replaced with a cutter tip corresponding to a desired radius. A commercially available cutter tip is used, but the cutter tips 40a, 40b, 4
As shown in FIG. 6, when the front end faces 41 are made to coincide with each other, the shapes of the side surfaces 42a and 42
The positions b and 42c are different from each other. Therefore, when the cutter tip is replaced, it is necessary to adjust the position of the contact surface of the rotary base and the guide roller that contacts the workpiece.

Although the above publication does not disclose the adjustment of the position of the contact surface, the guide roller is disposed on a rotating cutter, so that the entire outer peripheral surface of the guide roller serves as the contact surface. It is considered that the position of the contact surface is adjusted by replacing the guide roller itself. Regarding the rotary base, it is considered that the rotary base is replaced with one having a different thickness, or the rotary base is configured to be movable in the direction of the rotation axis by rotating the adjusting screw, and the position is adjusted. Can be

When replacing the rotary base, it takes time and effort to adjust the position, and it is necessary to prepare a plurality of types of rotary bases in advance, which increases the cost. Also,
When an adjustment screw is used, it is necessary to adjust the position using a scale while rotating the adjustment screw, and therefore, the deviation is likely to occur.

It is also possible to fix the positions of the contact surfaces of the guide roller and the rotary base and to change the mounting position of the cutter tip depending on the type. However, in this case, there is a possibility that the mounting position may be mistaken.
Further, newly manufacturing a cutter having a plurality of mounting positions causes a cost increase. Further, it is possible to cope with this by changing the shape of the cutting edge of the cutter tip with one attachment position, but in this case, it is necessary to manufacture a new cutter tip, which again causes a cost increase.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and has as its object to be able to easily and accurately adjust the position of a guide plate in accordance with a change in the type of a cutter chip. Is to provide.

[0008]

Therefore, the chamfering machine according to the first aspect of the present invention comprises:
Is mounted so that it can be rotated by the driving means 5, and the above-mentioned tip holder 8 is attached to the corner 10 a of the workpiece 10 in which the two side surfaces 11 and 12 are substantially orthogonal to each other. The tip holder 8 is attached to the main body 2.
The guide plate 13 mounted concentrically with the rotation axis 8a and adjustable in the direction of the rotation axis 8a is attached to the one side surface 11.
A guide roller 14 coaxially and rotatably mounted on the tip holder 8 with the rotation axis 8a.
2 abuts on the rotation axis 8a.
Is set so as to be substantially perpendicular to the one side surface 11, and the corner portion 10 a is cut by the cutter tip 9 so as to be chamfered so that the two side surfaces 11 and 12 are smoothly connected by a substantially arc-shaped curved surface. When performing machining to change the radius of the arc-shaped curved surface, the type of the cutter tip 9 is changed, and the position of the contact surface of the guide plate 13 and the guide roller 14 is adjusted. Positioning projections 21 are formed on one of the mounting surfaces of the guide plate 13 and the guide plate 13 mounted on the main body 2, and one of the mounting surfaces corresponds to the type of the cutter chip 9. Then, a plurality of fitting portions 22a, 22b, 22c having different positions in the direction of the rotation axis 8a are formed, and the fitting portion 22 selected according to the type of the cutter chip 9 is formed.
The position of the contact surface of the guide plate 13 is adjusted by fitting the positioning projection 21 into the guide plate 13.

In the above chamfering machine, the workpiece 1
When changing the radius of the arc-shaped curved surface in the chamfering process with respect to 0, the type of the cutter tip 9 is changed, and then the positioning projection 21 is fitted into the fitting portion 22 corresponding to the changed type of the cutter tip 9 to guide the guide plate. 13 is adjusted. Therefore, there is no need to prepare a scale or the like at the time of position adjustment as in the related art, and the operation is simplified. In addition, the occurrence of positional deviation after the adjustment is suppressed as compared with the case where the position is adjusted using the adjusting screw.

[0010] In addition to the above configuration, the chamfering machine according to claim 1 forms two or three or more positioning projections 21 at positions around the rotation axis 8a. Correspondingly, a plurality of fitting portions 22a,
22b and 22c are formed respectively.

In the chamfering machine according to the first aspect, since the position is adjusted by using two or three or more positioning projections 21 formed at positions around the rotation axis 8a, the inclination with respect to the rotation axis 8a is reduced. Prevention allows more accurate position adjustment.

Further, in the chamfering machine according to the second aspect, the plurality of fitting portions 22a, 22b, 22c are connected to each other by grooves 25, 26 for slidingly guiding the positioning projections 21. Features.

In the chamfering machine according to the second aspect, when the positioning projection 21 is fitted to another fitting portion 22 for position adjustment, the positioning projection 21 is moved along the grooves 25 and 26 to achieve a desired position. Is fitted to the fitting portion 22. Therefore, the positioning protrusions 21 can be reliably and smoothly placed on the desired fitting portions 22.
Can be fitted, so that the position adjusting operation is simplified.

According to a third aspect of the present invention, the fitting portion 22 and the grooves 25 and 26 are formed on the mounting surface of the main body 2, and the grooves are formed in parallel with the rotation axis 8a. A plurality of guide grooves 25a, 25b, 25c each having one end used as the fitting portions 22a, 22b, 22c;
A connection groove 26 formed substantially perpendicular to the guide groove 25 and connecting the other end of the guide groove 25 to the guide plate 25; The identification information 27 indicating the type of the cutter chip 9 is displayed on the mounting surface that is exposed when is moved along the guide groove 25.

In the chamfering machine according to the third aspect , when performing position adjustment, first, the guide plate 13 is moved in the direction of the rotation axis 8a so that the positioning projection 21 moves from the fitting portion 22 along the guide groove 25. At this time, since the identification information 27 indicating the type of the cutter chip 9 is displayed on the exposed mounting surface, the operator can visually confirm the desired position of the fitting portion 22. Then, the guide plate 13 is rotated around the rotation axis 8 a so that the positioning protrusion 21 moves along the connection groove 26, and the positioning protrusion 21 is moved until the positioning protrusion 21 reaches the guide groove 25 connected to the desired fitting portion 22. Here, by moving the guide plate 13 in the direction of the rotation axis 8a again, the positioning projection 21 is moved along the guide groove 25 to abut one end which is the fitting portion 22. Thus, the position of the guide plate 13 is adjusted.

According to a fourth aspect of the present invention, a thumb screw 23 is screwed to the guide plate 13 so that a tip end thereof can protrude from the mounting surface. A plurality of recesses 24a, 24b, and 24c are formed corresponding to the respective positions of the thumb screw 23 after the position adjustment of the guide plate 13, and the guide plate 13 is formed by turning the thumb screw 23 to fit the tip into the recess 24. Is fixed to the main body 2.

In the chamfering machine according to the fourth aspect , after the positioning projection 21 is brought into contact with one end of the guide groove 25 to adjust the position, the tip of the thumbscrew 23 is fitted into the recess 24 to guide the guide. The plate 13 is fixed to the main body 2. Therefore, it is possible to prevent the positioning projection 21 from moving along the guide groove 25, and to fix the guide plate 13 firmly.

According to a fifth aspect of the present invention, there is provided a chamfering machine comprising two thumb screws 2
3 and 23 are arranged at positions facing each other with the rotation axis 8a interposed therebetween, and a plurality of recesses 24a, 24b and 24c are formed corresponding to the respective thumb screws 23.

In the chamfering machine of the fifth aspect , the rotation axis 8
two thumbscrews 2 arranged at positions facing each other with respect to a
The guide plate 13 is fixed to the main body 2 using 3 and 23. Therefore, the guide plate 13 can be more firmly fixed by preventing the inclination with respect to the rotation axis 8a.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of the chamfering machine of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a chamfering machine 1 according to an embodiment of the present invention, and FIG. 2 is a plan view of the chamfering machine 1.

The chamfering machine 1 has a substantially cylindrical main body 2. The main body 2 has a substantially cylindrical projection 2a on one end surface and two handles 3, 4 mounted on the outer peripheral surface at an angle of about 120 °. The main body 2 has a built-in air motor 5 serving as a driving means, and one end 6a of a rotating shaft 6 of the air motor 5 is disposed in the protruding portion 2a. A mounting member 7 is fixed to the one end 6a, and a distal end 7a of the mounting member 7 protrudes from the protruding portion 2a. A tip holder 8 is mounted on the tip 7 a of the mounting member 7, and a cutter tip 9 is exchangeably mounted on the outer peripheral surface of the tip holder 8.
The cutter tip 9 rotates together with the tip holder 8 by driving the air motor 5, and rotates the corner 1 of the workpiece 10.
The corner portion 10a is cut by being slid in contact with 0a and chamfering is performed.

In performing the chamfering, it is necessary to accurately position the chamfering machine 1 with respect to the corner 10a. The chamfering machine 1 according to the present invention has a
The rotation axis 8a of the tip holder 8 is set so as to be substantially perpendicular to the one side surface 11 with respect to the corner portion 10a formed by the two side surfaces 11 and 12 being substantially orthogonal to each other.
Is chamfered so that the two side surfaces 11 and 12 are smoothly connected by a substantially arc-shaped curved surface. Therefore, the guide plate 13 attached to the main body 2 has the guide roller 1 attached to the tip holder 8 on one side surface 11.
4 is brought into contact with the other side surface 12 to perform positioning.

The guide roller 14 is attached to the tip end of the tip holder 8 coaxially with the rotation axis 8a of the tip holder 8 by a bolt 16 via a ball bearing 15. Thus, the guide roller 14 is rotatably mounted independently of the chip holder 8, and performs positioning by bringing its outer peripheral surface into contact with the other side surface 12 of the workpiece 10. When the cutter tip 9 is replaced with another type in order to change the radius of the arcuate curved surface, it is necessary to move the position of the outer peripheral surface of the guide roller 14 in the radial direction. For example, it is possible that one guide roller 14 can cope with a plurality of types of cutter chips 9 by forming an annular member so that it can be sequentially fitted on the outer peripheral surface. Because of the drawback of becoming complicated, the cutter tip 9
Types of guide rollers 14 formed according to the type of
Are prepared in advance, and are exchanged according to the type of the cutter chip 9.

On the other hand, the guide plate 13 includes a cylindrical mounting portion 17 and an annular contact portion 18 extending outward from one end of the mounting portion 17. The rotation axis 8 is concentric with the rotation axis 8 a of the holder 8.
It is attached so as to be movable along a. More specifically,
The mounting portion 17 of the guide plate 13 is fitted to the cylindrical positioning member 19 fitted to the projecting portion 2a of the main body 2.

A pin 20 penetrates through the mounting portion 17 from the outer peripheral surface toward the inner peripheral surface, and a tip portion (a protruding portion from the inner peripheral surface) of the pin 20 serves as a positioning projection 21. The number of the positioning protrusions 21 may be one, but as in the present embodiment, the two positioning protrusions 21 are connected to the rotation axis 8.
By arranging them at positions opposing each other with "a" interposed therebetween, stable and more accurate position adjustment can be performed.
Of course, three or more may be provided. Fitting portions 22 are formed on the positioning member 19, and the position of the guide plate 13 is adjusted by fitting the positioning projections 21 to the fitting portions 22.

After the position is adjusted, the thumb screw 23 provided on the mounting portion 17 is turned so that the tip of the thumb screw 23 is fitted into the recess 24 formed in the positioning member 19, and the bottom surface of the recess 24 is attached to the tip of the thumb screw 23. Press to fix. Although the number of the thumb screw 23 may be one, as in the present embodiment, two thumb screws 23,
By arranging 23 (only one is shown in FIG. 1) at positions opposing each other with the rotation axis 8a interposed therebetween, it is possible to fix firmly. It is to be noted that if three or more are arranged, it is possible to fix more firmly. However, since the number of operations for adjusting the position of the guide plate 13 increases, two are desirable.

Next, the configuration of the positioning member 19 will be described. FIG. 3 is a bottom view of the positioning member 19, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG.
7 is a development view of the outer peripheral surface of the positioning member 19. FIG. When the positioning member 19 is attached to the main body 2, the main body 2
The surface in contact with is the top surface, and the opposite side is the bottom surface. In the present embodiment, a configuration for performing position adjustment corresponding to three types of cutter chips 9 will be described. However, the present invention can be similarly implemented in the case of two types or four or more types.

The positioning member 19 is, as shown in FIG.
Since the same structure is formed symmetrically with respect to the rotation axis 8a, the structure shown on the right side in FIGS. 3 to 5 will be described as an example. On the outer peripheral surface of the positioning member 19, three fitting portions 2 corresponding to the three types of cutter tips 9 are provided.
2a, 22b, 22c (when collectively referred to by reference numeral "2
2 ") is formed. Specifically, as shown in FIG. 5, the fitting portions 22a, 22b and 22c
The positions in the direction a are different from each other.
Are set on the uppermost side, and the fitting portion 22c is set on the lowermost side. In the present embodiment, one end of each of the guide grooves 25a, 25b, 25c (referred to as a reference numeral “25” when collectively referred to) is formed so as to extend in parallel with the rotation axis 8a.
Used as 2a, 22b, 22c. The other end of each of the guide grooves 25a, 25b, and 25c is connected by a connection groove 26 extending in a direction substantially orthogonal to the guide groove 25. Further, one end 26a of the connection groove 26 is
The positioning member 1 is bent in a direction opposite to the guide groove 25.
9 is open at the bottom. The guide groove 25 and the connection groove 26 are formed at the same depth, and the depth is formed to be equal to or slightly larger than the height of the positioning projection 21.

Therefore, the position of the guide plate 13 in the direction of the rotation axis 8a can be adjusted by fitting the positioning projection 21 to the fitting portion 22 selected according to the type of the cutter chip 9. When the guide plate 13 is moved to another position, the guide plate 13 is moved along the rotation axis 8a until the positioning protrusion 21 moves along the guide groove 25 and reaches the connection groove 26.
The guide plate 13 is rotated around the rotation axis 8 a so that the positioning protrusion 21 moves along the connection groove 26, and the positioning protrusion 21 is moved to the other end of another guide groove 25. At this time, the positioning protrusion 21 is fitted to the fitting portion 22 which is one end of the guide groove 25 by moving the guide groove 25 to the upper surface again along the rotation axis 8a. As described above, the movement from the fitting portion 22 to another fitting portion 22 can be performed by moving the guide plate 13 so that the positioning protrusion 21 moves along the guide groove 25 and the connection groove 26. Work becomes easier. Further, if the positioning projection 21 is moved to the opening 26 a which is one end of the connection groove 26, the guide plate 13 can be removed from the positioning member 19.

As shown in FIG. 5, the fitting portions 22a,
On the upper surface side of 22b, 22c, identification information 27 indicating which cutter chip 9 the fitting portion 22 corresponds to.
a, 27b, 27c (when referred to collectively, reference numeral "27")
) Are displayed. In the present embodiment, an alphabetic character “R” indicating a radius and a number indicating the size of the radius are displayed side by side. For example, “R3” means that the chamfer radius is 3 mm. The display of the identification information 27 is realized by engraving or the like. These pieces of identification information 27 are displayed on a surface exposed when the guide plate 13 is moved to the bottom side. Therefore, the worker can use the identification information 2
By looking at 7, the position and type of the fitting portion 22 can be confirmed at the time of position adjustment, and the operation of position adjustment can be performed without error.

On the outer peripheral surface of the positioning member 19, three concave portions 24a, 24b for fitting the thumb screw 23 are provided.
24c (the reference numeral "24" is used when collectively referred to) is formed, but is formed at a different position along the direction of the rotation axis 8a in accordance with the type of the cutter tip 9,
It goes without saying that the thumbscrews 23 are formed at positions facing each other when the positioning projections 21 are fitted to the respective fitting portions 22a, 22b, 22c.

[0032]

As described above, according to the chamfering machine of the first aspect, the operation of adjusting the position of the guide plate is simplified, and the occurrence of positional deviation after the position adjustment is suppressed.

Further, according to the chamfering machine, it is possible to perform the position adjustment of the more accurate the guide plate to prevent inclination relative to the axis of rotation of the tip holder.

Further, according to the chamfering machine of the second aspect , since the positioning projection can be securely and smoothly fitted to a desired fitting portion, the operation of adjusting the position of the guide plate is simplified.

According to the third aspect of the present invention, the position of the fitting portion can be visually checked, so that the position of the guide plate can be surely adjusted by preventing an error.

According to the chamfering machine of the fourth aspect , the positioning projection can be prevented from moving along the guide groove, and the guide plate can be firmly fixed to the main body.

According to the chamfering machine of the fifth aspect , the guide plate can be more firmly fixed by preventing inclination with respect to the rotation axis.

[Brief description of the drawings]

FIG. 1 is a sectional view of a chamfering machine according to an embodiment of the present invention.

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

FIG. 3 is a bottom view of a positioning member used for position adjustment.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3;

FIG. 5 is a developed view showing an outer peripheral surface of the positioning member.

FIG. 6 is a schematic diagram showing a shape of a cutting edge of a cutter tip.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chamfering machine 2 Main body 5 Air motor 8 Tip holder 8a Rotation axis 9 Cutter tip 10 Workpiece 10a Corner 11 Side 12 Side 13 Guide plate 14 Guide roller 19 Guide member 19 Positioning member 21 Positioning protrusion 22 Fitting part 23 Thumb screw 24 Depression 25 Guide Groove 26 Connection groove 27 Identification information

Claims (5)

(57) [Claims] 1. A body (2) incorporating a driving means (5).
A tip holder (8) on which a cutter tip (9) is exchangeably attached is mounted so as to be rotated by the driving means (5).
Corner (10) in which two side surfaces (11) and (12) are substantially orthogonal
a), the main body (2) is concentric with the rotation axis (8a) of the tip holder (8) and the rotation axis (8).
a) a guide plate (13) mounted so as to be position-adjustable in the direction a) on one side surface (11), and a guide coaxially and rotatably mounted on the tip holder (8) with the rotation axis (8a). By contacting the roller (14) with the other side surface (12), the rotation axis (8a)
Is set so as to be substantially perpendicular to the one side surface (11),
The corner (10a) is cut by the cutter tip (9), and chamfering is performed so that the two side surfaces (11) and (12) are smoothly connected by a substantially circular curved surface. When changing the radius of the main body (2), the type of the cutter tip (9) is changed and the positions of the contact surfaces of the guide plate (13) and the guide roller (14) are adjusted. ) And the guide plate (13) attached to the main body (2), one of the attachment surfaces is provided with a positioning projection (2).
1), and a plurality of fitting portions (22a) (22) having different positions in the direction of the rotation axis (8a) corresponding to the type of the cutter tip (9).
b) Forming (22c), fitting the positioning projection (21) into the fitting portion (22) selected according to the type of the cutter tip (9), and contacting the guide plate (13) made by configured to adjust the position, two more addition
Forms three or more positioning projections (21) and (21) at positions around the rotation axis (8a), and a plurality of fitting portions (22a) corresponding to the positioning projections (21) and (21). And (22b) and (22c). 2. A plurality of said fitting portions (22a) (22)
2. A chamfering machine according to claim 1, wherein said positioning projections are connected to each other by grooves for slidingly guiding said positioning projections. 3. The fitting portion (22) and the groove (25) (2)
6) is formed on the mounting surface of the main body (2), and the groove is
It is formed in parallel with the rotation axis (8a), and one end thereof is provided with the fitting portion (22a) (22b) (22c).
Guide grooves (25a) (25b) used as
(25c) and a connection groove (26) formed substantially perpendicular to the guide groove (25) and connecting the other end of the guide groove (25). (2
In the vicinity of 2), the mounting surface that is exposed when the guide plate (13) is moved along the guide groove (25) has identification information (27) indicating the type of the cutter chip (9). 3. ) The chamfering machine according to claim 2 , wherein (1) is displayed. 4. A guide screw (23) is screwed into the guide plate (13) so that a tip portion thereof can protrude from an attachment surface, and the guide plate is attached to the attachment surface of the main body (2). A plurality of recesses (24a) (24b) (24) corresponding to each position of the thumb screw (23) after the position adjustment of (13)
3. The method according to claim 2 , wherein c) is formed, and the guide plate (13) is fixed to the main body (2) by turning the thumb screw (23) to fit the tip into the recess (24). Beveling machine. 5. The two thumb screws (23) are arranged at positions opposing each other with the rotation axis (8a) interposed therebetween, and a plurality of recesses (24) corresponding to each thumb screw (23).
The chamfering machine according to claim 4 , wherein a) (24b) and (24c) are formed respectively.