JPH09234616A - Chamfering device and its feeding base - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate attaching/detaching of a blade and discharging of chips by providing one of the feeding base of an article to be machined with by a screw so as to be detached, disposing a double-nut type screw for fine-tuning in the lower part of the fixed base of the V block of a screw attaching part and adjusting a chamfering width by the screw. SOLUTION: The attaching shaft 2 of a machining blade is attached to the shaft 3 of a motor 1 moved back and forth along an ant groove 7 by the rotation of a handle 9. V blocks 14 and 16 are fixed by screws 13 to the upper parts of L blocks 12 and 15 attached to a fixed base 11 and these are connected together by a connecting plate 17. Feeding bases 24 and 25 are fixed on the V blocks 14 and 16 and by rotating the integral feeding bases 24 and 25 around the rotary shaft of one end, an attaching shaft 2 is released and easily replaced by another. If the feeding bases 24 and 25 are adjusted in negative directions by a handle 22, a chamfering width is changed according to the lowering amounts thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering device for an end of a machined surface in a machining process such as cutting, grinding or cutting a metallic material or a nonmetallic material.

[0002]

2. Description of the Related Art Conventionally, in the processing of metal materials or non-metal materials performed in a machine shop, burrs are generated on the end surface of the processing surface in the processing such as cutting, grinding or cutting, and deep engraving. It is dangerous, and especially deep encroachment can cause the loss of commercial value. Therefore, cutting, grinding,
At the time of processing such as cutting, the end surface was chamfered with a file or grindstone. It is impossible to always chamfer the end face evenly with such a manual processing method using a file or a grindstone.Therefore, the chamfering width becomes large or small, and the chamfered portion has irregularities. Roughness usually changes and various states occur.

For this reason, a dedicated chamfering machine for mechanically chamfering has been commercially available, but since the reference feed table is fixed to the motor, for example, the blade mounting shaft The replacement needs to be performed once or twice a month, or once a week in an extreme case, and the loss of the working time is large. Further, since the feed table of the dedicated chamfering machine is fixed to the motor, it is difficult to replace the mounting axis of the blade, and in reality, only C chamfering is realized. Furthermore, the cutting tool is attached parallel to the motor axis, and the chamfering process is performed with the same blade part, which shortens the life of the cutting tool.
Therefore, the result is that the attachment shaft of the blade is frequently replaced.

Hereinafter, a conventional chamfering machine will be described with reference to FIGS.
1, FIG. 12, and FIG. 10 is a side view of a conventional chamfering machine, FIG. 11 is a front view of a feed table portion for moving a workpiece, FIG. 12 is a side view of a rotary cutting section, and FIG. 13 is a front view of a rotary cutting section. is there.

In FIG. 10, 51 is a motor, 52 is a motor mounting base, 53 is a base plate, and 54 is an L-shaped block. One surface of the L-shape is fixed around the bearing cover portion 55 of the motor 51 with a screw 55a, and the other surface is parallel to the base plate 53. Further, 56 is V-block-shaped, and the angle of the upper surface is 90 °. And on top of that, the feed board 57
And 58 are fixed. Reference numeral 59 denotes a joint shaft of the L-shaped block 54 and the V block 56, which is at the same height as the motor shaft 60 with respect to the base plate 53, and the V block has a predetermined angle with the joint shaft 59 as a fulcrum. It can be rotated.

Reference numeral 62 is a handle portion of an angle adjusting screw for the L-shaped block 54 and the V block, and a screw 62 at the lower portion thereof.
On the other hand, the upper screws 63 have the same pitch and the threading directions are opposite. That is, when the threading direction of the lower screw 62 is the right screw, for example, the upper screw 63
The threading direction of is a left-hand thread. As a matter of course, the threading direction on the L-shaped block side is the right-hand thread, and the threading direction on the V-block side is the left-hand thread. Therefore, by rotating the handle of the angle adjustment screw to the left or right,
With the joint shaft 59 as a fulcrum, the V block portion 56 moves up and down with respect to the blade mounting shaft 64. At this time, when the V block moves downward with respect to the attachment shaft 64 of the blade, the C chamfer angle increases, and when the V block moves upward, the chamfer angle of the workpiece 65 decreases. In addition,
In FIG. 11, 66 is an arrow indicating the rotation direction of the blade mounting shaft 64, and 67 is an arrow indicating the movement direction of the workpiece 65.

12 and 13 show a mounting shaft 64 for a blade.
3A and 3B are a side view and a plan view of the blade, in which a plurality of blades 68 are attached to the blade attachment shaft 64 (four positions in the figure).
The blade to be used is a cutting tool, and for example, cemented carbide, high-speed steel or the like is used. Also, 69 is
A pressing plate of a cutting tool, which is fixed by 70 screws. Further, 71 is a fitting portion with the motor shaft 60, which is directly connected to the motor shaft 60 (see FIG. 10) and is fixed with a screw 72. In addition, the tip of the cutting tool, that is, the plurality of cutting edges is relative to the motor shaft,
They are located at the same position from the center of rotation and have a clearance angle of β ° at the cutting edge. There is also a chamfering machine that uses a Hasba solid cutter as a cutting tool.

[0008]

However, in the prior art, since the chamfering process is always performed with a constant cutting edge portion, the tool life is short, and the feed block and the V block are used for exchanging the attachment shaft of the cutting edge. Therefore, it is more efficient to remove the L-shaped block from the motor section than to remove the joining shaft in some cases. In this case, there is a problem in that in order to replace the mounting axis of the blade, it is necessary to remove all and reassemble from the beginning, and adjustment is required. There is a problem in that the blade using the special blade cutter is expensive.

Furthermore, since the discharged chips always remain on the feed table of the work piece, it is necessary to always blow them away with air for cleaning. That is, the number of chamfers is 1 when the workpiece is a cube or a rectangle.
There are two points, and the cleaning at each time is almost the same as the chamfering processing time, or on the contrary, it takes time to clean, and there is also a problem that the number of steps is increased.

Further, since the cutting tool is perpendicular to the work piece feed table and a plurality of blades intermittently hit the work piece, the unevenness of the work surface becomes large, and the work piece is particularly soft. In the case of a metal material, a burnishing phenomenon occurs, and it is also a problem that the surface worked hard is deformed at the end face and becomes a swelling phenomenon.

[0011]

According to the present invention, the rotary shaft of the blade and the feed bar of the workpiece are structurally separated, and the feed bar can be rotated by 30 ° or more with respect to one fixed shaft of the feed bar. A motor with a double-nut type ascending / descending shaft provided at the lower center of the center of the other side, which is fixed by the thumbscrew, and the blade mounting shaft is directly connected. It was possible to move in the direction perpendicular to.

Further, continuous cutting chips can be obtained by setting the cutting blade at a predetermined angle θ with respect to the center of rotation of the blade mounting shaft.

Further, in order to discharge chips, a plurality of chip discharge ports or discharge grooves are provided on one surface of the feed table in the moving direction of the workpiece after the blade mounting axis. Then, set the angle at the bottom of the chip escape groove on the surface of the feed base to 4
By setting the angle to 5 ° or less, it is possible to easily clean the feed table surface by air due to the natural fall of chips,
In addition, the flatness of the feed table is easily maintained.

By fixing the concave cutting tool to the mounting shaft of the blade and exchanging the mounting shaft, C
Not only chamfering but also chamfering of R shape or irregular shape is possible.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Since the mounting axis of a blade attached to a motor can be moved together with the motor, long-term machining is possible, and the mounting axis of the blade is set at a predetermined angle of θ. By doing so, it was possible to extend the life of the blade.

[0016]

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 is a perspective view of a chamfering apparatus according to the present invention, FIG. 2 is a front view of FIG. 1 seen from the front, FIG. 3 is a view showing a mounting axis of a cutting blade, and FIG. 4 is an example of a cutting blade, 5 and 6 show another embodiment of a cutting tool. 7 is a view showing the feed base, a plan view of the feed base portion, FIG. 8 is a side view of FIG. 7, and FIG. 9 is a partially enlarged view of FIG.

In FIG. 1, 1 is a motor, and 2 is a mounting shaft for mounting a cutting blade, which is fixedly mounted on a shaft 3 of the motor-1. Also, the motor-1 is attached to the motor base 4, and the motor base 4 has bolts 5
It is fixed to the base plate 6 by. The base plate 8 is threaded on the rear surface of the base plate 6 by the dovetail groove 7, and the motor 1 is moved back and forth along the dovetail groove 7 by rotating the handle 9. In addition, 10 is a fixed plate fixed to the fixed base 11.

Next, reference numeral 12 is an L-shaped block attached to the fixed base 11, and a V block 14 is fixed to the upper portion by a thumbscrew 13. Reference numeral 15 is an L-shaped block, and a rotation shaft 26 (not shown in FIG. 1; see FIG. 2) is fixed to the L-shaped block 15 at a substantially central portion of the side surface of the V block 16. The rotary shaft 26
On the other hand, the feed table is rotatable. Furthermore, 17 is V
A plate connecting the block 14 and the V block 16,
The V block 14 and the V block 16 are integrated.
The plates 18 and 19 parallel to the connecting plate 17 are for reinforcing the integrated V blocks 14 and 16 and the connecting plate 17. In addition, a screw is cut on the fixing base 11 at approximately the center of the V block 14, and the screw 20 fitted to the screw and the pole 21 fixed to the tip thereof have a spherical tip. And a nut 23 for fixing the handle 22 for rotating the screw 20. In addition,
Numerals 24 and 25 are feed bases for the workpiece to be screwed and fixed to the V blocks 14 and 16.

FIG. 2 is a front view 6 of the chamfering machine,
The V block 14 and the V block 16 are shown in a state where the feed blocks 24 and 25 are fixed to the connecting plate 17 and integrated. That is, the thumbscrew 13 is loosened, and the integrated feed base is rotated about the rotary shaft 26, so that
The portion of the mounting shaft 2 of the blade attached to the center of the tool-1 is opened to facilitate the replacement of the mounting shaft 2. The rotation angle θ with respect to the rotation shaft 26 at this time may be any number as long as the attachment shaft 2 of the blade can be easily replaced, and is generally in the range of 30 ° or more. Further, the feed bar integrated by the handle 22 is set to have a notch of "0" when the fixed base 11 is parallel to the fixed base 11, and the feed base integrated with the fixed base 11 is negative. When it is adjusted in the direction, that is, when the V block 14 becomes lower with respect to the rotation shaft 26, the chamfer width changes according to the descending amount. Reference numeral 27 is a foot of the processing apparatus.

FIG. 3 shows the mounting shaft 2 of the blade, which is directly connected to the shaft 3 of the motor-1 and fixed by the screw 28. Reference numeral 29 denotes a cutting tool, for example, a cutting tool such as cemented carbide or high-speed steel, which has an inclination angle of α ° with respect to the center line of the mounting shaft 2. In the figure, the cutting blade 29 is not newly made, and for example, there is an advantage that a cutting tool used in a factory can be used with a predetermined size.

4, 5, and 6 show an example of the external shape of the cutting tool, and FIG. 4 shows a cutting tool 32 for C chamfering, where ω is the width of the cutting tool. And, the clearance angle of β is provided on the cutting edge. Further, in FIGS. 4 and 5, the blade is attached at a predetermined angle α ° with respect to the mounting shaft 2, so that in FIG. 5, the R-chamfered cutting blade 29 has an angle of α ° as shown in FIG. A clearance angle of β ° is provided with respect to the angle. 4 and 6 are blade shapes 32 and 33 when the cutting blade is mounted parallel to the rotation center of the mounting shaft 2, 32 in FIG. 4 for C chamfering, and 33 in FIG. 6 for R chamfering. Needless to say, there is compatibility as a blade of a conventional chamfering device.

FIG. 7 shows the feed platforms 24 and 2 for the workpiece 35.
5 is a plan view, FIG. 8 is a side view of FIG. 7, and FIG. 9 is a partially enlarged side view of FIG.
7, in principle, W is longer than the length L of the machined surface of the work piece 35 in the entire width of the feed bases 24 and 25, but it is not always necessary to stick to this, and the work piece 35 can be manually indicated by an arrow. When moving in the direction 34, the feed platforms 24 and 2
5 may be contacted and transferred. Reference numeral 36 is an approximately midpoint of the entire width W of the feed base, which is a relief portion due to the rotation of the mounting shaft 2 of the cutting edge, and the cutting edge is 0 to 3 mm in this portion.
It is designed to project. (In the case of C chamfering of 90 ° chamfer, the chamfer width is twice the protrusion amount.) And 37
The part (indicated by the dotted line) is a state diagram in which a plurality of discharge ports are intermittently provided for facilitating discharge of chips generated by cutting that occurs during chamfering, and 38 is a relief part of the rotary shaft from the relief part of the rotary shaft. FIG. 3 is a state diagram in which one is extended to form a chip discharge groove.

Further, FIG. 8 shows a side view thereof, and the feed bases 24 and 25 are screwed and fixed to the V blocks 14 and 16 (see FIG. 1) so as to be 90 °. At this time, the chip escape groove 3 is formed on the surface of the feed bases 24 and 25.
9 are formed at equal intervals and parallel to the moving direction of the workpiece 35.

FIG. 9 is an enlarged view of a part of the chip escape groove 39. That is, the upper portion 40 of the chip escape groove 39 is formed at 90 ° with respect to the contact surface with the workpiece, while the lower portion 41 is at an angle of 45 ° or less. The surface 42 of the feed table is made flat. The feed table is preferably made of a hard material such as hardened steel.

The operation will be specifically described below.
In the chamfering apparatus of the present invention, not only the conventional C chamfering apparatus but also an apparatus capable of performing R chamfering or chamfering of an irregular shape, and therefore a mounting shaft having a plurality of cutting blades mounted thereon is C chamfered. It is possible to easily replace the one for chamfering, the one for R chamfering, and the one for chamfering a different shape. As this method, the feed table of the work is made so that one of the rotary shafts can be attached and detached with the thumbscrew, and the V of the thumbscrew mounting part can be attached.
A finely adjustable double-nut type screw is placed under the fixed base of the block, and the chamfer width is changed by adjusting this screw.

At this time, in the case of C chamfering, the chamfering width is narrower than the cutting blade width, that is, the blade width is 5 at the minimum.
If the cutting edge wears out due to repeated chamfering, the handle at the rear of the motor moves the motor by the minimum chamfering width because the chamfering width is more than mm.
It can always be a new cutting edge, which can be used several times repeatedly, depending on the chamfer width, which means that the mounting axis of the cutting blade does not have to be replaced, reducing the number of replacement steps. be able to.

Further, in the conventional cutting blade, since the blade is mounted parallel to the center of rotation of the mounting shaft, the chamfered surface becomes an intermittent uneven surface, and the impact on the cutting edge during chamfering is large. Although there was also an early wear of the cutting edge due to this, in the present invention, since the cutting blade is tilted at a predetermined angle α ° with respect to the center of rotation, the chips produced by cutting are continuous and the surface quality is also good. Improved, less impact, and longer life of the cutting edge is possible.

Further, the cutting edge is not a flat straight line,
If the concave R surface shape is used, the end surface portion of the workpiece can be chamfered in an R shape, and if the concave shape is formed, the end surface portion can be formed as a convex shape. As for the cutting edge, there is also an effect that the cutting edge of a tool that has already been used up is cut into a predetermined size and processed, so that a new cutting edge is not purchased and the tool can be effectively used in the company.

When the workpiece is a non-metallic material, for example, a hard and brittle material such as glass or ceramics, the blade has an outer diameter of 50 mm or less such as WA abrasive grains, GC abrasive grains, and diamond abrasive grains. It is also possible to use a grindstone with a shaft for grinding of No. 3, and in this case, when it is attached to the shaft 3 of the motor, it can be attached via a connecting joint (not shown).

Next, the chips generated when the workpiece passes through the cutting blade portion and chamfering is performed,
It is preferable that the chips are discharged sequentially. For this reason, a plurality of discharge ports are provided intermittently in the moving direction of the work piece after the mounting axis of the cutting blade and for facilitating the discharge of chips to one feed table. ing. This is to prevent the work piece from coming off from the intersection of the feeds 24 and 25 when the work piece is a thin material or a small material, and the work piece is a thick material. If a large material is used, a groove cut parallel to the traveling direction from the relief portion of the rotary shaft may be used instead of the intermittent discharge port. Needless to say, these discharge ports and discharge grooves can be attached not only to one feed table but also to the other feed table, that is, both feed tables. The emission effect of is large.

Further, regarding chips generated during cutting, conventionally, chips are left in the groove of the feed base of the work piece, and the chips cannot be discharged and accumulate at the bottom of the groove of the feed base. This sometimes affected the chamfering accuracy. On the other hand, in the present invention, the upper part of the groove portion of the feed bar may be machined at 90 ° to the surface of the feed bar, but the lower part of the groove is cut at an angle of 45 ° or less. Therefore, even if the chips enter the groove, they form a plane parallel to the vertical line in the moving direction of the work piece when making a 45 ° cut, and an obtuse angle when making a cut of 45 ° or less, so the chips naturally fall. It will be easily discharged from the groove.

[0033]

As described above, according to the present invention, since the feed table of the workpiece can be easily released from the mounting axis of the cutting blade, it becomes easy to replace the mounting axis of the cutting blade or the grinding blade. In the case of C chamfering, if the blade wears off, the life of the blade can be extended by moving the motor to which the blade for cutting is attached so that the blade becomes a new blade. Furthermore, by exchanging the cutting blade, a convex chamfer or an irregular chamfer is possible. Further, if the cutting blade has a predetermined thickness, there is an effect that it is possible to utilize the usage of the cutting tool conventionally used in other steps.

Further, since the lower part of the groove cut parallel to the movement of the work piece is set to 45 ° or less on the feed base of the work piece, the chips are naturally dropped, and further provided at the intersection of the feed base. There is also an effect that the chips can be easily discharged by forming the discharged parts of the cut chips as intermittent discharge ports or discharge grooves.

[Brief description of drawings]

FIG. 1 is a perspective view of a chamfering apparatus according to the present invention. 1, motor 2, mounting shaft 9, handle 13, thumbscrew

FIG. 2 is a front view of FIG. 22, handle 23, nut 26, rotating shaft

FIG. 3 is a mounting shaft of a cutting blade. 28, screw α °

FIG. 4 is an example of a cutting blade. 32, cutting blade β °

FIG. 5 is another embodiment of FIG. 29, cutting blade

FIG. 6 is another embodiment of FIG. 33, cutting blade

FIG. 7 is a plan view of a feed table. 36, escape portion 37 of mounting shaft 2, intermittent discharge port 38, discharge groove

FIG. 8 is a side view of FIG. 7; 39, chip escape groove

FIG. 9 is a partially enlarged view of FIG. 8; 40, upper part of groove 41, lower part of groove

FIG. 10 is a side view of a conventional chamfering machine. 55, bearing cover

FIG. 11 is a front view of FIG. 10; 59, joining shaft 61, angle adjusting screw

FIG. 12 is a side view of a rotary cutting unit. 64, mounting axis for blades

FIG. 13 is a front view of FIG. β °, clearance angle 66, direction of rotation

[Explanation of symbols]

 1 Motor 2 Mounting Shaft 3 Shaft 4 Motor Stand 5 Bolt 6 Base Plate 7 Dovetail Groove 8 Substrate 9 Handle 10 Fixing Plate 11 Fixing Base 12 L-type Block 13 Thumb Screw 14 V-block 15 L-type Block 16 V Block 17 V Block 14, 16 Connecting Plate 18, 19 Reinforcing Plate 20 Screw 21 Ball 22 Handle 23 Nut 24, 25 Feeding Stand 26 Rotating Shaft 27 Foot 28 Screw 29 Cutting Blade 30 Holding Plate 31 Screw 32, 33 Cutting blade 34 Direction of movement of work piece 35 Work piece 36 Relief part of mounting shaft 37 Intermittent discharge port 38 Discharge groove 39 Chip escape groove 40 Upper part of groove 41 Lower part of groove 42 Surface of feed table 51 Motor 52 Motor mounting base 53 Base plate 54 L-shaped block 55 Bearing cover part 56 Screws 57, 58 Feeding base 59 joining shaft 60 motor shaft 61 angle adjusting screw 62 lower screw 63 upper screw 64 blade mounting shaft 65 workpiece 66 rotation direction 67 moving direction 68 blade 69 pressing plate 70 screw 71 mating portion 72 screw α mounting shaft Angle of inclination β Escape angle θ Rotation angle W Width of feed bar ω Width of cutting blade L Width of work piece

Claims (6)

[Claims] 1. A C-chamfering, R-chamfering or irregularly-shaped chamfering device for a workpiece such as a metallic material or a non-metallic material, wherein one of a table for sending the metallic material or the non-metallic material is fixed. A part that is rotatable with respect to the shaft and that can be attached to and detached from the other end with a thumbscrew and that can be moved up and down to the bottom of the base that is fixed with the thumbscrew and that can make fine adjustments, and that is in contact with the feed base at the tip. Is a spherical shape, and a rotating handle of the screw and a double nut for fixing the screw are arranged, and the mounting shaft of the blade directly connected to the main shaft of the motor in the middle part between the rotatable fixed shaft and the removable thumbscrew A chamfering device having a shaft for mounting a blade and an adjusting mechanism for moving a motor in a front-back direction with respect to a feed table for a workpiece. 2. By rotating the removable fixed shaft according to claim 1 by loosening the other removable thumbscrew, the feed table of the workpiece is rotated by 30 ° or more with respect to the rotatable fixed shaft. A chamfering device characterized by facilitating the exchange of blades by making it possible. 3. An outer circumference of the mounting shaft is divided into equal parts at a predetermined angle with respect to the center line of the mounting shaft of the cutting tool, and the cutting tool is attached to that portion, and the cutting tool is for cutting cemented carbide or high speed steel. The chamfering device according to claim 2, wherein the cutting surface of the cutting tool is straight or concave. 4. The blade according to claim 3, which has an outer diameter of 50.
A chamfering device characterized in that a grindstone with a grinding shaft of mm or less can be used. 5. The movement of the work piece is provided on the surface of the plate that serves as a guide of the feed base section so that the whole of the projection section is a flat surface, and with respect to the movement direction of the work piece, after the mounting axis of the blade. A feed table of a chamfering apparatus, characterized in that a chip discharge groove or a plurality of discharge holes are provided in a feed table portion in the direction. 6. A concave-convex groove formed on the surface of two feed bases configured to have a predetermined angle, wherein one angle of the concave groove is 90 ° and the angle of the other groove is 45 °. The chamfering machine of the present invention is characterized in that the following is set, and that the 90 ° concave and convex groove is the upper part with the feed table fixed, and the one that is 45 ° or less is the lower part.