JPH0540921Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a chamfering device for round bars such as rods and pipes.

[Prior art] A device for chamfering round bars of different diameters was developed in 1983.
-Already disclosed by No. 134815. As shown in the plan view of FIG.
1, a plurality of smooth roller devices 2000 having axes parallel to 1, and a high spiral thread 4001.
and a plurality of spiral roller devices 4000 each having a low-height spiral thread 4002 formed on the outer periphery thereof, and a plurality of spiral roller devices 4000 that are rotatably arranged;
In this configuration, a stopper member 6000 is disposed above and parallel to the axis 1001 of the rotating grindstone 1000.

In this round bar chamfering device, as shown in FIG.
00 and in a direction perpendicular to the axis of the spiral roller device 4000. and smooth roller device 2
000, when the spiral roller device 4000 is rotationally driven, the screw threads 4001 and 4002 of the spiral roller device 4000 rotate, so that the round bar W is rolled and transferred in the axial direction of the spiral roller device 4000, and the smooth roller device A thrust force in the direction of arrow T is applied to the round bar W by the rotational drive of 2000.

As a result, the tip of the round bar W is pressed toward the grindstone surface of the rotary grindstone 1000 while the round bar W is rolling. Therefore, the tip of the round bar W is efficiently chamfered over its entire circumference by the grindstone surface of the rotary grindstone 100.

By the way, in the round bar chamfering device described above, when chamfering a large diameter round bar W10, as shown in FIG.
Set it to 0. On the other hand, small diameter round bar W20
When chamfering, use a high thread 400
1 and the low screw thread 4002, there is a round bar W2
Set it to 0.

In the round bar chamfering device described above, the large diameter round bar W
10, the lower surface of the round bar W10 will be at a height h1. On the other hand, small diameter round bar W20
When chamfering, the bottom surface of the round bar W20 is h2
The height position will be . Therefore, in order to properly chamfer a round bar, it is necessary to adjust the height position of the rotary grindstone 1000 and the height position of the smoothing roller device 2000 one by one in accordance with the above-mentioned fluctuation in the height position.

Moreover, the spiral roller device 4 of the round bar chamfering device described above
000, as shown in FIG. 8, a short screw thread 4002 with a low height and a small pitch is arranged between a screw thread 4001 with a high height and a large pitch. The degree of freedom in pitching Mt. 4002 was low. That is, when the pitch of the taller threads 4001 is set to a predetermined pitch, the smaller threads 4 arranged between the taller threads 4001 are set to a predetermined pitch.
The pitch of 002 had to be about 1/2 of the pitch of the taller screw thread 4001.

[Problems to be solved by the invention] The invention is an improvement on the round bar chamfering device described above, and even when chamfering round bars with different diameters, the height of the rotating grindstone or smooth roller device can be improved. An object of the present invention is to provide a round bar chamfering device that does not require adjustment of the screw position and can increase the degree of freedom of the thread pitch of a spiral roller device.

[Means for Solving the Problems] A round bar chamfering device according to the present invention includes: a rotatably disposed rotary grindstone; a plurality of sets of smooth roller devices rotatably disposed in front of the rotary whetstone; A plurality of spiral roller devices are rotatably arranged approximately parallel to and in front of the rotating grinding wheel and have spiral threads formed on the outer periphery, and are arranged above the rotating grinding stone substantially parallel to its axis. In the round bar chamfering device, the spiral roller device includes: at least two spiral rollers each having a spiral thread on the outer periphery and each having a different pitch; It is comprised of a roll switching device that holds the rollers so that they can be raised and lowered, and that switches any one of the at least two spiral rolls to a round bar support position at a constant height by raising and lowering the rollers. .

The rotating grindstone, smooth roller device, and stopper member are
A device having the same structure as the conventional one can be used.

The spiral roller device that characterizes the present invention includes at least two spiral rollers each having a spiral thread on the outer periphery and each having a different pitch of the thread, and a spiral roller that is held movably up and down so that at least two rollers can be moved up and down. It is comprised of a roller switching device that switches any one of the spiral rollers to a round bar support position at a constant height position.

As exemplified in the embodiment described later, the roller switching device includes a seesaw member that is swingably arranged and holds two spiral rollers, and a seesaw member that swings the seesaw member to move the spiral rollers to a fixed height position. A drive device that can be switched to a round bar support position.

The seesaw member only needs to have the function of holding the spiral roller and the function of swinging, and its shape is not particularly limited, although it is generally a seesaw shape having a certain length. The drive device can be formed by a hydraulic cylinder, a drive motor, a gear mechanism, a link mechanism, etc.

[Function] In the round bar chamfering device according to the present invention, when the smooth roller device and the spiral roller device are driven to rotate as in the conventional case, the round bar set on the smooth roller device and the spiral roller device is The round bar is transported while being rolled along the axial direction, and a thrust is applied along the axial direction of the round bar by the rotational drive of the smooth roller device, so that the tip of the round bar is chamfered.

By the way, in the round bar chamfering device according to the present invention, when chamfering round bars of different diameters, a spiral roller having a thread pitch corresponding to the diameter of the round bar is selected from two or more spiral rollers. , the spiral roller is raised by a roller switching device, and the spiral roller is set at a round bar support position at a constant height. Then, in this state, the smooth roller device and the spiral roller device are rotationally driven.

[Effect of the invention] As explained above, in the round bar chamfering device according to the present invention, the spiral roller device has at least two spiral rollers each having a spiral thread on the outer periphery and each having a different pitch. It is comprised of a roller and a roller switching device that switches any one of the at least two spiral rolls to a round bar position at a constant height.

Therefore, when chamfering round bars with different diameters, select a spiral roller with a thread pitch corresponding to the diameter of the round bar from among two or more spiral rollers, and then It is raised by a switching device and the spiral roller is set at a round bar support position at a constant height. Therefore, even when chamfering round bars with different diameters, the method shown in Figures 7 and 8
Unlike the conventional method shown in the figure, there is no need to adjust the height position of the rotary grindstone or the smoothing roller device, and therefore the work of chamfering the tips of round bars of different diameters can be performed satisfactorily.

In addition, since a low-height, small-pitch screw thread is not arranged between high-height, large-pitch screw threads, when setting the pitch of the screw threads of the spiral roller,
Unlike the conventional round bar chamfering device shown in FIGS. 7 and 8, the degree of freedom of the thread pitch can be increased.

[Example] As shown in FIGS. 1 and 2, the round bar chamfering device according to this example includes a rotating grindstone 1, a plurality of smooth roller devices 6 in front of the rotating grindstone 1, and a rotating grindstone. 1, a plurality of spiral roller devices 2 in front of the
are each arranged rotatably on a base 5, and a stopper member 3 is arranged substantially parallel to the axis of the grinding wheel 1 and above the grinding wheel 1.

The rotary grindstone 1 has a cylindrical shape and is rotatably arranged on a base 5. As shown in FIG. 2, the rotating grindstone 1 is connected to a drive motor 14 via a belt 11. The rotating grindstone 1 can be adjusted in position upward by 45 degrees, that is, in the direction of arrow E, by a position adjustment mechanism 12. This is to adjust the amount of chamfering of the round bar W.

A plurality of spiral roller devices 2 are rotatably arranged substantially parallel to and in front of the rotary grindstone 1. Each spiral roller device 2 according to this embodiment includes a seesaw member 22 that holds a pair of a first spiral roller 20 and a second spiral roller 21, a drive device 29 that swings the seesaw member 22, It consists of 1st
The spiral roller 20 has a spiral thread 20a formed on its outer periphery. Second spiral roller body 2
1 is formed with a spiral thread 21a having a smaller thread height and smaller pitch than the thread 20a. Here, as shown in FIG. 2, the seesaw member 22 is pivotably supported around a shaft 22a. The drive device 29 includes a rod 23 that connects each seesaw member 22, and a hydraulic cylinder 24 that operates the rod 23 in its axial direction. Therefore, by operating the hydraulic cylinder 24 and operating the rod 23, the seesaw member 22 of the spiral roller device 2 can be swung about the shaft 22a. Either one of the second spiral rollers 21 and the second spiral roller 21 can be appropriately switched to a round bar supporting position at a constant height.

That is, when the outer diameter of the round bar W is small, the hydraulic cylinder 24 is activated to operate the rod 23 in its axial direction, thereby rotating the second spiral roller 21 having the small pitch thread 21a. When switching to the round bar support position at a constant height, and when the outside diameter of the round bar W is large, the hydraulic cylinder 24 is operated in the opposite direction to operate the rod 23 in the opposite direction along its axis, and the pitch is increased. The first spiral roller 20 having a large screw thread 20a is switched to a round bar support position at a constant height. In this way, even if the outer diameter of the round bar W changes in size, there is no need to adjust the height positions of the rotary grindstone 1 and the smoothing roller device 6.

Here, a motor 25 is fixed to the base 5. The rotational force of the motor 25 is the rod 26, the rod 2
6, the gear 20c of the spiral roller 20 and the gear 2 of the spiral roller 21 via the bevel gear 27a, the rod 27, and the gear 28.
1c, spiral roller 20, spiral roller 2
1 is set to rotate.

The stopper member 3 has a face plate shape, is held on a base 5, and is arranged above the rotary grindstone 1 substantially parallel to its axis. This stopper member 3 comes into contact with the tip of the round bar W, and has a stopper function for stopping the round bar W.

The round bar supply device 4 is for supplying the round bar W to the spiral roller 2, and is arranged in front of the rotating grindstone 1.

By the way, as shown in FIG. 1, a smooth roller device 6 is arranged between the spiral roller devices 2. The smooth roller device 6 includes a roller main body 60 having a smooth outer peripheral portion and a motor 61 that rotationally drives the roller main body 60. In this embodiment, the smooth roller device 5 is arranged such that the axis of the smooth roller device 5 moves toward the rotating grindstone 1 as the spiral threads 20a, 21a of the helical roller device 2 wind in the winding direction, that is, in the direction of arrow F (see FIG. 1). Angle θ so that it is spaced from
It is placed at an angle. Therefore, when the smooth roller device 6 is driven to rotate, a thrust is applied to the round bar W on the smooth roller device 6 in the direction of arrow G (see FIG. 2), and this thrust causes the round bar W to move toward the stopper member 3 and rotate. It can be pressed against the grindstone 1, and furthermore, since the smooth roller device 6 is arranged at an angle θ, rotational force can be applied to the round bar W. Therefore, the round bar W rolls smoothly due to the rotational force, and slipping of the round bar W can be suppressed. Therefore, the entire periphery of the tip of the round bar W will surely come into contact with the grindstone surface 1a of the rotary grindstone 1, and the chamfering operation of the tip of the round bar W can be performed satisfactorily.

In this example, as shown in FIG. 1, a wire brush device 7 is arranged beside the rotary grindstone 1. As shown in FIG. 6, the wire brush device 7 includes a bracket 72 pivotally supported by a pin 72a, a brush body 70 held by the bracket 72 and rotatable via the pin 70a, and a brush body 70 held by the bracket 72. A brush motor 71 rotates the motor through a belt 71a, a hydraulic cylinder 74 swings a bracket 72 and is pivotally supported on the base 5 by a pin 74a, and a hydraulic cylinder 74 for forward and backward movement held on the bracket 72 by a stand 75a. It has a cylinder 75, an end face alignment stopper 76 having a feed adjustment handle 76a provided on the hydraulic cylinder 75, and a clamp 77.

In addition, in FIGS. 1 and 2, 26b, 27
b, 2a, 1c, 1d, 60a, and 60b are bearings, respectively.

Now, the chamfering method according to this embodiment will be explained. First, the round bar supply device 4 is driven to lower the round bar W between the threads of either the spiral roller 20 or the spiral roller 21 of the spiral roller device 2, as described above.

That is, when the outer diameter of the round bar W is small, the hydraulic cylinder 24 is operated and the rod 23 is operated, thereby swinging the seesaw member 22 around the shaft 22a, and threading the thread 21a with a small pitch. The second helical roller 21 having a height is switched to a round bar support position at a constant height. On the other hand, when the outer diameter of the round bar W is large, the hydraulic cylinder 24 is operated in the opposite direction, the rod 23 is operated in the opposite direction, and thereby the seesaw member 22 is swung in the opposite direction. The first helical roller 20 having a height is switched to a round bar support position at a constant height. In this way, even if the outer diameter of the round bar W changes in size, there is no need to adjust the height positions of the rotary grindstone 1 and the smoothing roller device 6.

Here, since the smooth roller device 6 is being rotated by the drive motor 61 and the spiral roller device 2 is being rotationally driven, the round bar W transferred onto the spiral roller device 2 in the chamfering process is marked with an arrow G. A thrust is applied in the direction (see FIG. 2), and as a result, the tip W1 of the round bar W is pressed against the grindstone surface 1a of the rotary grindstone 1 and the stopper member 3, as shown in FIG. That is, the round bar W is pressed toward the grindstone surface 1a of the rotary whetstone 1 by the rotation of the smooth roller device 2, and at the same time is pressed against the axis of the rotary whetstone 1 by the spiral thread of the spiral roller 2. It is transferred in the direction of arrow F (see FIG. 1) while being rolled almost parallel. Therefore, the end surface of the tip W1 of the round bar W is connected to the stopper member 3.
The rotating grindstone 1 slides on the grindstone surface 1a of the rotary grindstone 1 while being guided by. As a result, the end face of the tip of the round bar W is chamfered over the entire circumference of the end face.

When the chamfering is completed, the round bar W reaches the wire brush device 7 side. Then, the clamp 77 is operated by a hydraulic cylinder (not shown), and the clamp 77 is actuated by a hydraulic cylinder (not shown).
7, the end faces of a large number of round bars W are aligned.
In this state, the bracket 72 is attached to the pin 72a due to the extension of the piston rod 74b of the hydraulic cylinder 74.
swing upwards. At this time, the brush body 70
is rotated by a brush motor 71. Therefore, since the tip W1 of the round bar W comes into sliding contact with the brush surface 700 of the brush body 70, the tip of the round bar W is deburred.

Further, in this embodiment, unlike the conventional example shown in FIGS. 7 and 8, the screw threads 21a having a low height and a small pitch are not arranged between the high height and large pitch threads 20a. Therefore, screw threads 20a, 2
The degree of freedom in the pitch of 1a can be increased.

Furthermore, in this embodiment, the smooth roller device 6 is arranged so as to be inclined so that the axis of the smooth roller device 5 moves away from the rotating grindstone 1 as it goes in the winding direction of the spiral threads 20a, 21a of the spiral roller device 2. has been done. Therefore, when the smoothing roller device 6 is rotationally driven, rotational force is applied to the round bar W on the smoothing roller device 6 in addition to the thrust force as described above.
Therefore, this rotational force allows the round bar W to roll smoothly, suppresses slipping of the round bar, and has the advantage that the tip of the round bar W can be chamfered reliably.

Furthermore, in this embodiment, since the wire brush device 7 swings as described above, even if a burr W2 (see FIG. 6) is generated on the tip W1 of the round bar W during the chamfering process, the burr W2 can be easily removed.

Note that in this embodiment, the chamfering conditions can be set as follows. For example, the rotation speed of the spiral roller device 2 is 73 rpm, and the lateral feed speed of the spiral roller device 2 is
133mm/sec, rotation speed of smoothing roller device 5 3.5rpm,
Feed speed of smooth roller device 5 20 mm/sec, rotation speed of rotary grindstone 1 1750 rpm, circumferential speed of rotary grindstone 1
It can be set to 1540m/min.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the chamfering device according to this embodiment, FIG. 2 is a side view thereof, and FIG. 3 is a side view of main parts of the helical roller device. FIG. 4 is a front view of a main part of a spiral roller having a high thread, and FIG. 5 is a front view of a main part of a spiral roller having a short thread. FIG. 6 is a side view of the wire brush device. FIG. 7 is a plan view of a conventional round bar chamfering device, and FIG. 8 is a front view of a main part of a spiral roller device of the conventional round bar chamfering device. In the figure, 1 is a rotating grindstone, 2 is a spiral roller device, 2
0 is a first spiral roller, 21 is a second spiral roller, 22 is a seesaw member, 29 is a drive device, 3 is a stopper member, 5 is a base, 6 is a smooth roller device, 7
1 and 2 respectively indicate a wire brush device.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A rotatably disposed rotary whetstone, a plurality of sets of smooth roller devices rotatably disposed in front of the rotary whetstone, and a roller device substantially parallel to the rotary whetstone. a plurality of spiral roller devices rotatably arranged in the front and having spiral threads formed on the outer periphery; and a stopper member arranged above the rotary grindstone substantially parallel to its axis. In the round bar chamfering device configured, the spiral roller device includes at least two spiral rollers each having a spiral thread on the outer periphery and each having a different pitch of the thread, and each spiral roller can be raised and lowered. and a roller switching device that holds at least one of the two spiral rollers at a certain height and switches any one of the two spiral rollers to a round bar support position at a constant height by raising and lowering the rod. chamfering device. (2) The roller switching device includes a seesaw member that is swingably arranged and holds two spiral rollers, and a seesaw member that swings to move the spiral rollers to a round bar support position at a constant height. 1. A round bar chamfering device according to claim 1, which comprises a changeable drive device.