JPH09295251A - Cut copying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the cutting in accordance with each standard without changing a copy roll for each standard. SOLUTION: This cut copying device comprises an eccentric cam 12 to be rotatably fitted to a fitting part 6 of a spindle 6 in which a milling cutter 10 is fitted to a tip of the fitting part 6a concentrically through a bearing 11, a copy roll 13 to be fitted to the eccentric cam 12 through a bush 13a, a timing pulley 14 to be fitted to the eccentric cam 12, a motor 15 provided on a frame 2, a timing pulley 16 fitted to a rotary shaft 15a of the motor 15, and a timing belt 17 to connect the timing pulleys 14, 16. The distance between an outer circumferential surface part of the copy roll 13 to be abutted on the outer circumferential surface of a steel tube 100 and the axis O1 of the spindle 6 can gradually be changed by adjusting the direction of the eccentric cam 12 in the circumferential direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting and copying apparatus for cutting a work while cutting the work along the surface of the work.

[0002]

2. Description of the Related Art When cutting a work, as a cutting copying apparatus for cutting the work along the surface of the work, for example, Japanese Patent Laid-Open No. 7-11690.
There is one disclosed in Japanese Patent No. this is,
As shown in FIG. 8, a protrusion 50b is formed at the tip of the attachment portion 50a of the main shaft 50, the milling cutter 51 is attached to the attachment portion 50a, and the bearing 5 is attached to the protrusion 50b.
The copying roll 53 is detachably provided via the two.

In such a structure, the copying roll 53 is brought into contact with the outer peripheral surface of the workpiece 101 such as a pipe material or a bar material to rotate the main shaft 50, and at the same time, the copying roll 5 is rotated.
3 to roll the copy roll 53 and the workpiece 10.
By relatively moving 1 and 1, it is possible to chamfer the work 101 while cutting the work 101 with the milling cutter 51 at a constant depth (see FIG. 8A).
When changing the processing standard, by replacing the copying roll 53 with one having a different diameter size,
The above change can be performed (see FIG. 8B).

[0004]

SUMMARY OF THE INVENTION The above-mentioned JP-A-7-17-1
The cutting copying apparatus disclosed in Japanese Patent No. 16903 has the following problems. (1) Copying roll 5 having an appropriate diameter according to the above standards
Since it is necessary to use No. 3, it is necessary to prepare a large number of copying rolls 53 having different diameter sizes, which makes maintenance and the like of the copying rolls 53 very complicated. (2) When exchanging the copying roll 53, it is necessary to temporarily stop the processing work and clean the periphery of the roll 53 and the like, which requires a great deal of work and is inefficient.

(3) When a welding bead or the like is projected on the surface of the work 101, when the rolling roll 53 rolls on the bead, the work 10 by the milling cutter 51 is performed.
The chamfering process of No. 1 becomes insufficient, and it becomes impossible to finish according to the regulation. (4) If the milling cutter 51 is worn or damaged,
When the milling cutter 51 is to be replaced, the copying roll 53 also has to be removed once, so that it takes a lot of trouble to replace it.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a cutting profiler according to the present invention is an eccentric cam which is rotatably fitted to a main shaft coaxially equipped with a milling cutter, and the eccentric cam. And a eccentric cam positioning fixing means for positioning and fixing the circumferential direction of the eccentric cam.

The above-described cutting and copying apparatus is provided with the undulation measuring means for measuring the undulation of the surface of the work, and the profiling control means for controlling the eccentric cam positioning and fixing means based on the signal from the undulation measuring means. It is characterized by

In the above-described cutting copying apparatus, the eccentric cam is fitted to the base end side of the main shaft with respect to the mounting position of the milling cutter of the main shaft.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a cutting copying apparatus according to the present invention will be described with reference to FIGS. In addition,
FIG. 1 is a sectional view showing the structure, FIG. 2 is a front view showing a schematic structure of an example of a steel pipe cutting machine to which a cutting copying apparatus according to the present invention can be applied, and FIG. 3 is a side view of FIG.

As shown in FIG. 2 and FIG.
A guide table 3 is provided on a frame 2 provided on an upper part of the table to guide and support a steel pipe 100, which is a work continuously manufactured by a spiral manufacturing facility, an electric resistance welded pipe manufacturing facility, and the like so that the steel pipe 100 can travel. The frame 2 has a steel pipe 1
A clamp 4 for holding 00 is provided. The frame 2 is provided with a pair of cutter heads 5 opposed to each other with the steel pipe 100 sandwiched therebetween so as to be able to move toward and away from each other in the horizontal direction and the vertical direction by the same size, and the cutter head 5 has its main shaft. The shaft center of 6 is the steel pipe 10
It is deployed so as to face the axis direction of 0.

The frame 2 is provided with the cutter head 5
A vertical drive device 7a for moving the cutter head 5 toward and away from each other in the vertical direction and a horizontal drive device 7b for moving the cutter head 5 toward and away from the cutter head 5 by the same size are provided. The cutter head 5
Each of them is provided with a rotary drive device 7c for rotationally driving the main shaft 6. Each of the driving devices 7a to 7c
Are electrically connected to the cutter head control device 8, and the cutter head control device 8 controls the operation of these drive devices 7a to 7c based on the conditions inputted in advance.

That is, in the steel pipe cutting machine, a steel pipe 100 continuously manufactured by a spiral manufacturing facility, an electric resistance welded pipe manufacturing facility, etc. is supported so as to be able to run on the guide table 3, and the steel pipe 100 is clamped by the clamp 4. When the cutter head control device 8 drives the drive device 7 based on a pre-input condition, the steel pipe 100 travels in synchronization with the steel pipe 100.
The operation of a to 7c is controlled.

As shown in FIG. 1, the mounting portion 6 of the main shaft 6 is mounted.
A milling cutter 10 is attached to the tip of a so as to be coaxial with the main shaft 6. An eccentric cylindrical eccentric cam 12 is fitted to the mounting portion 6a of the main shaft 6 via a bearing 11. That is, the eccentric cam 1
The shaft 2 is fitted to the main shaft 6 so as to rotate while being eccentric to the base end side of the mounting position of the milling cutter 10. The copying roll 13 is fitted to the outer peripheral surface of the eccentric cam 12 via a bush 13a.

A timing pulley 14 is fitted on the outer peripheral surface of the eccentric cam 12. The timing pulley 1
Reference numeral 4 is connected to a timing pulley 16 of a rotary shaft 15a of a motor 15 attached to the frame 2 via a timing belt 17. Timing belt 1
7 is expandable / contractible in its longitudinal direction. That is,
By driving the motor 15, the timing pulley 16, the timing belt 17, the timing pulley 1
4 to rotate the eccentric cam 12 with respect to the main shaft 6,
That is, the circumferential direction of the eccentric cam 12 can be positioned, and the driving of the motor 15 is stopped to prevent the eccentric cam 12 from rotating via the timing pulley 16, the timing belt 17, and the timing pulley 14. That is, the circumferential direction of the eccentric cam 12 can be fixed.

That is, since the eccentric cam 12 is eccentric as described above, as shown in FIG. 4, by changing the direction in the circumferential direction, the outer peripheral surface of the copying roll 13 that contacts the outer peripheral surface of the steel pipe 100. Since the distance S between the portion and the axis O ₁ of the main shaft 6 can be gradually changed, the cutting depth t of the milling cutter 10 with respect to the steel pipe 100 can be arbitrarily set as shown in FIG. It has become. In the figure, O ₂ is the center of rotation of the copying roll 13, R is the radius of the copying roll 13, δ ₀ is the difference between O ₁ and O _2, and δ is the amount of adjustment eccentricity.

[0016] Such timing pulleys 14, 16,
In the present embodiment, the eccentric cam positioning and fixing means is constituted by the motor 15, the timing belt 17, etc., and the eccentric cam positioning and fixing means, the bearing 11, and the eccentric cam 1 are provided.
2, the copying roll 13 and the like constitute a cutting copying device in this embodiment. In FIG. 1, 5a is a housing of the cutter head 5, 5b is a bearing that rotatably supports the main shaft 6 with respect to the housing 5a, and 5c is a bearing that rotatably supports the eccentric cam 12 with respect to the housing 5a. Is.

A case where a steel pipe is cut by using the above steel pipe cutting machine to which such a cutting copying device is applied will be described below.
After the motor 15 is operated and the eccentric cam 12 is rotated through the timing pulley 16, the timing belt 17, and the timing pulley 14, the distance S is set to a target size, and then the spiral manufacturing facility or the electric resistance welded pipe is installed. By gripping the steel pipe 100 continuously manufactured by the manufacturing facility or the like with the clamp 4, the steel pipe cutting machine is operated by the steel pipe 10.
0 and the cutter head controller 8 actuate and control each of the driving devices 7a to 7c.
Based on the preset conditions, that is, the copying roll 1
When the cutter head 5 is moved and the main shaft 6 is rotated so as to bring the outer peripheral surface of the steel pipe 100 into contact with the steel pipe 3 and roll the steel pipe 100, the steel pipe 100 becomes eccentric.
Due to the above-mentioned action, the chamfering is performed while cutting at the intended cutting depth t corresponding to the distance S.

In this way, when the chamfering of the steel pipe 100 is performed, if the copying roll 13 is mounted on the welding bead or the like protruding on the outer peripheral surface of the steel pipe 100, the welding bead or the like. If the motor 15 is operated to rotate the eccentric cam 12 so as to increase the distance S by an amount corresponding to the height of the steel pipe 100, the cutting and chamfering of the steel pipe 100 can be performed with a certain size.

When the standard for chamfering the steel pipe 100 is changed, the motor 15 is operated to rotate the eccentric cam 12 as described above, and the distance S is changed to a new target size. That is, it is possible to immediately implement the standard change without setting, that is, without stopping the operation of the spindle 6 and the like or replacing the copying roll 13.

Further, when the milling cutter 10 is abraded or chipped due to the chamfering of the steel pipe 100, the eccentric cam 12 and the copying roll 13 are attached to the spindle 6 more than the mounting position of the milling cutter 10. Since it is arranged at the base end side, the milling cutter 10 can be removed from the main shaft 6 and replaced without removing the above-mentioned members from the main shaft 6.

Therefore, according to such a cutting copying apparatus, the following effects can be obtained. (1) Since it is not necessary to prepare the copying roll 13 for each cutting and chamfering standard, there is no need for troublesome maintenance and the like of the copying roll. (2) Since it is not necessary to replace the copying roll 13 when changing the cutting chamfering standard, the standard can be changed immediately, the work accompanying the standard change becomes very easy, and the work efficiency is greatly improved. Can be made. (3) Since the cutting and chamfering can be performed with a constant size without being influenced by the surface shape of the steel pipe 100, the steel pipe 100 can always be finished as specified. (4) Since the milling cutter 10 can be replaced without removing the copying roll 13 and the like from the spindle 6, the milling cutter 10 can be easily replaced.

In this embodiment, the eccentric cam positioning and fixing means is composed of the timing pulleys 14 and 16, the motor 15, the timing belt 17 and the like. However, for example, the eccentric cam can be rotated by hand and the eccentricity can be changed. If the cam can be stopped with a clamp, etc., the rotation of the main shaft, etc. will have to be temporarily stopped, so the work efficiency is inferior to that of the present embodiment, but the structure is simplified. Therefore, the cost can be reduced.

A second embodiment of the cutting copying apparatus according to the present invention will be described with reference to FIG. Note that FIG. 6 is a cross-sectional view showing the structure. However, the same parts as those in the above-described embodiment will be denoted by the same reference numerals as those in the above-described embodiment, and the description thereof will be omitted.

As shown in FIG. 6, the milling cutter 10
The measuring instrument 2 which is an undulation measuring means such as a camera or a distance sensor for measuring the undulations of the surface of the steel pipe 100 is provided in the vicinity of
8 are provided. The measuring device 28 is electrically connected to a copying control device 29 which is a copying control means, and the copying control device 29 detects the circumferential direction of the eccentric cam 13 based on the measurement signal from the measuring device 28. The motor 15 is controlled so that the direction is set to a predetermined position.

That is, when the welding bead or the like is projected on the surface of the steel pipe 100 and the copying roll 13 is lifted up on the welding bead, the copying control device 29 is based on the signal from the measuring device 28 regarding the surface undulation of the steel pipe 100. Then, the motor 15 is controlled to rotate the eccentric cam 13 to adjust the distance S so that the size of the cutting chamfering process for the steel pipe 100 of the milling cutter 10 is kept constant.

Therefore, according to such a cutting profiler, it is possible to obtain the same effects as those of the above-described embodiment, and the steel pipe 100 is always cut and chamfered in a constant size. As described above, since the distance S can be automatically adjusted according to the surface shape of the steel pipe 100, it is possible to further improve the working efficiency of processing.

In each of the above-mentioned embodiments, the eccentric cam positioning and fixing means is composed of the timing pulleys 14 and 16, the motor 15, the timing belt 17 and the like. For example, as shown in FIG. The sprockets 34 and 36 are attached to the cam 12 and the motor 15, respectively, and these sprockets 34 and 36 are connected by an endless chain 37. As shown in FIG. 7B, while the pinion 44 is attached to the eccentric cam 12,
A rack 46 may be attached to the tip of the rod 45a of the cylinder 45 so that the pinion 44 and the rack 46 mesh with each other.

Further, in each of the above-described embodiments, the milling cutter 10 having the chamfering blade portion on both sides is used, but the milling cutter or the chamfering blade having the chamfering blade portion on only one side is used. It can be applied even in the case of a milling cutter having only a part. Further, in the above-described embodiment, the case where the traveling steel pipe 100 is gripped by the clamp 4 and applied to the steel pipe cutting machine for cutting the steel pipe 100 has been described, but the present invention is not limited to such a steel pipe cutting machine, and, for example,
The present invention can be applied to various cutting machines such as a machine in which the workpiece is cut by rotating the spindle while moving the workpiece arranged near the spindle. Further, in each of the above-described embodiments, the case where the steel pipe 100 is cut and chamfered has been described. However, for example, not only pipes and rods made of other materials such as resin such as hard vinyl chloride, but also according to the surface shape Any work that can be used for cutting can be applied without particular limitation.

[0029]

According to the cutting copying apparatus of the present invention, the following effects can be obtained. (1) Since it is not necessary to prepare a copy roll for each cutting and chamfering standard, there is no need for troublesome maintenance of the copy roll. (2) Since it is not necessary to replace the copying roll when changing the cut chamfering standard, the standard can be changed immediately, the work associated with the standard change becomes very easy, and work efficiency is greatly improved. be able to. (3) Since the work can be always machined to a constant size without being influenced by the surface shape of the work, the work can always be finished as specified. (4) Since the milling cutter can be replaced without removing the copying roll or the like from the spindle, the milling cutter can be easily replaced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a first embodiment of a cutting copying apparatus according to the present invention.

FIG. 2 is a front view showing a schematic structure of an example of a steel pipe cutting machine to which a cutting copying apparatus according to the present invention can be applied.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is an explanatory view of the operation of the main part of FIG.

FIG. 5 is an explanatory view of the operation of the main part of FIG.

FIG. 6 is a cross-sectional view showing the structure of a second embodiment of the cutting copying apparatus according to the present invention.

FIG. 7 is a structural diagram of another example of the eccentric cam positioning and fixing means.

FIG. 8 is a sectional view showing a structure of an example of a conventional cutting copying apparatus.

[Explanation of symbols]

 6 Spindle 6a Mounting part 10 Milling cutter 11 Bearing 12 Eccentric cam 13 Copying roll 14,16 Timing pulley 15 Motor 17 Timing belt 28 Measuring instrument 29 Copying control device 34,36 Sprocket 37 Endless chain 44 Pinion 45 Cylinder 46 Rack 100 Steel pipe

Claims (3)

[Claims] 1. An eccentric cam rotatably fitted to a main shaft coaxially mounted with a milling cutter, a profiling roll rotatably fitted to the eccentric cam, and a circumferential direction of the eccentric cam. And a eccentric cam positioning and fixing means for fixing the same. 2. An undulation measuring means for measuring the undulation of the surface of a work, and a copying control means for controlling the eccentric cam positioning and fixing means based on a signal from the undulation measuring means. The copying machine according to Item 1. 3. The cutting copying apparatus according to claim 1, wherein the eccentric cam is fitted closer to the base end side of the spindle than the mounting position of the milling cutter on the spindle.