JPH0825123A - Chamfering device - Google Patents

Abstract

PURPOSE:To simplify and automate a device, which chamfers work provided by cutting a metallic round bar by fixed length, so as to efficiently eliminate a burr or a warp generated in cutting. CONSTITUTION:A knife 2 rotating around the sane axial line R as work 1 is provided with plural cutting edges 4 arranged in the circumference direction of an end face 3' in a rotating part 3 at equal intervals, and each cutting edge 4 is inclined at a chamfering angle toward the center of the rotating part 3, so that the work 1 and the knife 2 can be relatively advanced/retracted, and as a result, chamfering is carried out in a single process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering device which automatically chamfers an end face of a work at a predetermined angle by using a metal round bar as a work, and rotates a blade whose axis is aligned with the work. A cutting blade provided on the end face of the cutting tool is used to remove burrs and the like on the end face.

[0002]

2. Description of the Related Art A work obtained by cutting a metal round bar having a constant diameter into a predetermined length has a strain along a cut surface or a burr on an end surface, so the following processing is performed. Before, it is necessary to chamfer the end face of the work to remove the strain and burrs.

Conventional chamfering devices used for such chamfering are, for example, Japanese Patent Laid-Open No. 3-197714 (Known Example 1) and Japanese Patent Laid-Open No. 5-337716 (Known Example 2).
There is. In the known example 1, the end face portion of the work is laterally cut by the primary cutter provided in the peripheral portion of the milling blade, and then,
A secondary cutter provided around the center portion chamfers the cut end surface of the work at a predetermined chamfering angle. In the known example 2, a flat plate-shaped workpiece is chamfered by contacting a peripheral edge portion of a flat plate-shaped work between a pair of left and right bevel gear-shaped rotary blades in which a cutting blade is inclined at a chamfering angle.

[0004]

In the known example 1, the chamfering of a round bar-shaped work requires two steps, that is, crossing and chamfering, which requires time and labor, and the structure of the blade is complicated and expensive. is there. The known example 2 is suitable for chamfering the peripheral edge of a flat plate-shaped work, but since the work itself is rotated to the cutting position, in the case of a round bar-shaped work, it is technically suitable for holding during cutting. It is difficult to apply as it is.

On the other hand, the present applicant has filed Japanese Patent Application No. 5-19915.
No. 56 has filed a parts feeder in which a metal rod-shaped work cut into a predetermined size can be conveyed with its axis aligned on a carry-out belt without using a vibration feeder.

It has become necessary to connect a device for chamfering to the work carried out by the parts feeder to make the work supply more automated. From the above, there has been a problem to be solved in a device for chamfering a round bar-shaped work, which is capable of simplifying the shape of the blade and automating it with high efficiency.

Therefore, the present invention is a chamfering device that uses a metal round bar having a substantially constant length and diameter as a work, and a blade for cutting the end face of the work rotates with the end face coaxial with the work. And a plurality of cutting blades, which are arranged at equal intervals in the circumferential direction on the end surface of the rotating portion and are inclined at a chamfering angle toward the axis of the rotating portion, respectively. The chamfering device is characterized in that the inner diameter formed by the portion is larger than the diameter of the work, and at least the work or the blade is provided so as to be movable in the axial direction.

The chamfering device of the present invention is provided with the two cutting tools which are provided coaxially with the end surfaces having the cutting blades facing each other and which advance and retreat along the axis, and the two cutting tools are provided. A disk that rotates with an axis parallel to the blade axis is provided between the two, and the disk has a thickness that is less than the length of the workpiece, and the disk is evenly divided in the circumferential direction on the disk. A plurality of work holding holes penetrating the front and back of the disk, and a drive device for intermittently rotating the disk so as to stop the work fitted in each work holding hole between the two blades, By providing a cutter advancing / retreating device that causes two cutters to come into contact with both ends of the work in conjunction with the stop of the disk, it is possible to provide a device that automates chamfering with high efficiency.

Further, according to the present invention, at the stop position where the work in the work holding hole of the disk is chamfered by the cutting tool, another one of the work holding holes of the disk is aligned with the supply portion of the work supply chute. To receive the uncut work, and to connect the supply chute and the pusher so that another work holding hole is aligned with the installation position of the pusher and the chamfered work is discharged. It is also possible to provide a device that is suitable for connection with a parts feeder and has an automated chamfering process with high efficiency.

[0010]

When the end face of the workpiece and the end face of the rotary portion of the cutting tool are coaxially positioned and one of them is brought into contact with the other end face, the work is brought into contact with the other end face as shown in FIG. The peripheral edge of the end face is cut by a cutting blade that is inclined and rotating, and the work can be chamfered in one step.

The chamfering blade used in the present invention is simply provided with a plurality of cutting blades inclined at the chamfering angle on the end face of the rotating body which rotates coaxially with the work. The structure becomes extremely simple. As described above, the present invention has solved the above-mentioned problems.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. A metal round bar having a substantially constant length and diameter is used as a work 1, and a blade 2 having a chamfered end face 1 ′ is rotated with the end face 3 ′ being coaxial with the work 1 as shown in FIG. 1. It comprises a part 3 and a plurality of cutting blades 4 which are equally distributed in the circumferential direction of the end face 3 ′ of the rotating part 3 (see FIG. 2).

Each cutting blade 4 is inclined together with the chamfering angle, in this case 45 °, toward the axial center of the rotating part 3 and rotates integrally with the rotating part 3. Further, the inner diameter d1 formed by the outer end portion 4'of each cutting blade 4 has a diameter sufficiently larger than the diameter d2 of the work 1.

The blade 2 is connected to an advancing / retreating device, which will be described later,
It is provided so as to be movable in the axial direction, and further advances from the position where the cutting blade 4 first comes into contact with the end face 1'of the work 1, and as shown in FIG. 1
1 of FIG.
Chamfer as shown in.

In the chamfering device of the present invention, the blade 2 is moved forward while being rotated, and is retracted to receive the next work 1, or the work 1 is pressed toward the blade 2 which is rotating at a fixed position. It is optional. Whether to make the cutting blade 4 and the rotating body 3 separately or integrally
Is arbitrary, and the inclination angle of the cutting blade 4 is not limited to 45 °.

In this embodiment, the rotary portion 3 of the blade 2 is
And the end face member A forming the end face 3 ′ of the end face member A is a separate body, and the end face member A has a T-shaped cross section, penetrates the center of the rotating portion 3 and is screwed to rotate the rotating portion 3. It is connected to the end of the shaft B, and the end face member A is exchanged with one having a different length, or a shim plate (not shown) is inserted between the flange of the end face member A and the inner end face 3 ″ of the rotating portion. By doing so, the protruding length of the end face 3'is adjusted so that the chamfer length can be changed.

FIG. 3 shows an embodiment in which the chamfering device of the present invention equipped with the cutting tool 2 is automated. In this example,
The blade 2 has an axis R common to one side of the machine base F,
And, the cutting blades 4 face each other to form a pair of two,
Each can be moved in the axial direction. A disk 6 in which work holding holes 5 penetrating through the front and back are equally arranged in the circumferential direction of a peripheral edge portion 6 ′ is rotatably provided between two facing blades 2.

The disk 6 is fixed at its center to a rotary shaft 7 which is laid horizontally on an axis L parallel to the axis R of the cutting tool 2 at an appropriate interval, and a stepping motor for rotating the disk having the rotary shaft 7 attached thereto. 8 (driving device) to intermittently rotate in one direction at regular intervals.

The work 1 is supplied to the work holding hole 5 in the peripheral portion 6'of the disk 6 through the hole. Then, at a position where the work 1 intervenes between the two blades 2, the disk 6 is controlled to stop for a certain period of time by the operation of a predetermined stepping motor 8.

Interlocking with the stopping operation of the disk 6, the two blades 2 rotate and move forward to chamfer both ends of the work 1 held in the work holding holes 5 as described above. Each of the two blades 2 is integrally connected to a blade rotating motor 9, and always rotates. or,
The two blades 2 are supported together with their respective blade rotating motors 9 by an advancing / retreating device 10 which is moved back and forth on the axis R.

In this embodiment, the advancing / retreating device 10 includes
A rail 12 slidably supporting a mount 11 for a motor 9 for rotating a blade and a piston 13 at the rear end of the motor 9.
A fluid pressure device is used which is composed of a cylinder 14 which is fixed on the machine base F by connecting the tips of the above.

The drive mechanism of the advancing / retreating device 10 is not limited to the fluid pressure device, but may be a link motion mechanism such as a combination of a crank and a rod that is intermittently rotated by a motor.

Further, the peripheral edge portion 6'of the disk 6 provided with the work holding hole 5 must have a thickness smaller than the length of the work 1 when chamfering both ends simultaneously. In this chamfering device, when the rotation of the disk 6 is stopped and the work 1 in one work holding hole 5 is chamfered as described above, the other work holding hole 5 is supplied to the work supply chute 15. The work holding hole 5 is aligned with the portion 15 ', and the other work holding hole 5 is aligned with the installation position of the pusher 16 for discharging the work (see FIGS. 5, 6, and 7).

Although not shown in the drawing, the work supply chute 15 has a base end placed below a discharge port in which an elongated slit having a diameter substantially equal to the diameter of the work 1 is opened at the bottom of a funnel-shaped hopper. The work is provided with a receiving portion whose axis extends along the direction of conveyance from the discharge port, and conveys the work 1 with its axis aligned vertically. As shown in FIG. 8, the end of the chute 15 holds one work. The work 1 is automatically supplied to the disk 6 by installing it at the stop position of the hole 5. As the pusher 16 for ejecting the chamfered work 1 from the work holding hole 5, a cylinder 16 ″ that makes the piston 16 ′ reciprocate once in association with the stop of the disk 6 is used.

In this embodiment, the disk 6 is provided with eight work holding holes 5 with the circumference equally divided, and the work discharger 16 is fitted to one side of the work holding hole 5 at the top of the disk 6. A discharge chute 21 for accommodating the work 1 extruded by the pusher 16 in a stocker (not shown) or the like is provided on the other side.

90 degrees from the installation position of the pusher 16
° A disk 6 is placed at a position that matches the front work holding hole 5.
A pair of two blades 2 are provided on the front and back sides with the blade sandwiched therebetween, and further, a supply portion 15 'of a work supply chute 15 is installed at the front position in the rotation direction of 180 °.

At a chamfering position where two blades 2 chamfer the work 1 in the work holding hole 5 from the front and back, a pedestal 17 is erected on the side of the disk 6, and as shown in FIG. A rod 19 protruding from a cylinder 18 installed at the top is inserted into a hole 20 communicating with the work holding hole 5 from the outside of the disk 6, and chamfered between the tip of the rod 19 and the inner surface of the work holding hole 5. It is configured to sandwich the center of the work 1 to be held.

Incidentally, the rod 19 and the pusher 16
It goes without saying that the advancing and retreating of the piston 16 ′ and the supply of the work 1 from the work supply chute 15 are performed in synchronization with the intermittent rotation of the disk 6.

As described above, the feature of the present invention is that the work 1
And the axis R are made coincident with each other, and the rotary unit 3 provided with a plurality of cutting blades 4 inclined at the chamfering angle is rotated to move forward and backward relative to the workpiece in the axial direction. Therefore, the work holding structure, the cutter advancing / retracting device, the work supply / discharge structure, and the like for chamfering are not limited to the illustrated embodiments, and may be arbitrarily designed and modified according to the gist of the present invention.

[0030]

As described above, the end face of the rotating part which is rotated coaxially with the workpiece to be chamfered is equally divided in the circumferential direction, and each of them is located at the axis of the rotating part. According to the present invention, which chamfers the end surface of the work having a substantially constant length and diameter by a tool provided with a plurality of cutting blades inclined to the chamfering angle, the work is chamfered. This can be performed by a very efficient and simple one-step operation of bringing the blades into and out of each other in the axial direction. Further, since the structure of the blade to be chamfered is extremely simple, it can be manufactured at low cost and is very useful for automating the chamfering device.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of a cutting tool according to the present invention.

FIG. 2 is a front view of the same blade.

FIG. 3 is a plan view of a chamfering device using the same blade.

FIG. 4 is a front view of the same chamfering device.

FIG. 5 is a left side view of the same chamfering device.

FIG. 6 is a right side view of the same chamfering device.

FIG. 7 is a partially cutaway front view showing an installation portion of a pusher.

FIG. 8 is a partially cutaway front view showing a supply chute portion of the work.

FIG. 9 is a right side view, partly cut away, showing a support device portion of a work to be chamfered.

[Explanation of symbols]

 1 Work 1'End Face 2 Blade 3 Rotating Part 3'End Face 3 "Rotating Inner End Face 4 Cutting Blade 4'Outer End 5 Work Holding Hole 6 Disk 6'Rim Edge 7 Rotating Shaft 8 Stepping Motor (Drive) 9 For Turning Tool Motor 10 Advance / retractor 11 Mounting base 12 Rail 13 Piston 14 Cylinder 15 Supply chute 15 'Supply part 16 Pusher 16' Piston 16 "Cylinder 17 Frame 18 Cylinder 19 Rod 20 Hole (hole on disk side) 21 Ejecting chute A End member B Rotation drive shaft F Machine stand L Axis R Work and blade axis d1 Outer end inner diameter d2 Work diameter

Claims (3)

[Claims] 1. A chamfering device using a metal round bar having a substantially constant length and diameter as a work, wherein a cutting tool for cutting the end face of the work has a rotating portion that rotates with the end face coaxial with the work. And a plurality of cutting blades that are equally circumferentially arranged on the end surface of the rotating portion and are inclined at a chamfering angle toward the axis of the rotating portion, and the outer end portion of each cutting blade is formed. The chamfering device has an inner diameter that exceeds the diameter of the work, and at least the work or the blade is provided so as to be movable in the axial direction. 2. The chamfering device according to claim 1, wherein the end faces having the cutting blades are made to face each other, and the chamfering device is provided coaxially with the two blades that advance and retreat along an axis. A disc that rotates with an axis parallel to the blade axis is provided between the individual blades with a peripheral edge having a thickness that is less than the length of the workpiece, and the peripheral edge of the disk is equally divided in the circumferential direction. Drive for rotating the disk intermittently so that a plurality of work holding holes penetrating the front and back of the disk are provided and the work fitted in each work holding hole is stopped between the two blades. A chamfering device comprising: a device and a device for advancing and retracting the blades, which interlocks two blades with both ends of a work in conjunction with the stop of the disk. 3. The disk at a stop position where the work is chamfered by the blade, the other work holding hole is aligned with the supply portion of the work supply chute to receive the uncut work, and The chamfering device according to claim 2, wherein one work holding hole is connected to the installation position of the pusher and is connected to the supply chute and the pusher so as to discharge the chamfered work.